Patent Translate Powered by EPO and Google Notice This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate, complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or financial decisions, should not be based on machine-translation output. DESCRIPTION JP2018056747 PROBLEM TO BE SOLVED: To provide a listener who is positioned on the front panel side of a passive radiator mounted speaker provided with a passive radiator on the opposite surface of a speaker casing in a backrest, by providing a powerful bass sound than before. SOLUTION: The present invention is provided with a first passive radiator 21 and a second passive radiator 22 which resonate by utilizing air vibration in a casing 10 of the speaker, respectively, in a state of being opposed to the opposing surfaces 11 and 12 of the casing 10. The present invention relates to a passive radiator mounted speaker 1 including a reflecting member 40 at a position facing the second passive radiator 22 provided on one surface 12 of the facing surfaces at an interval in the outward direction. [Selected figure] Figure 1 Passive radiator mounted speaker [0001] The present invention relates to a speaker equipped with a passive radiator. [0002] Generally, small-sized speakers do not easily emit bass, and so a bass reflex system, a passive radiator system, and the like are known as methods for effectively producing bass. The passive radiator is a speaker unit that removes an electromagnetic circuit from the speaker unit and operates using air vibration in the housing of the speaker. Passive radiators are used for 03-05-2019 1 small-sized portable speakers and the like because they resonate at a fixed frequency and can produce powerful deep bass by mainly amplifying and reinforcing the bass range (for example, patent documents See 1). [0003] FIG. 7 shows a front perspective view (7A) and a rear perspective view (7B) of a speaker equipped with a conventionally known passive radiator. [0004] The conventional passive radiator mounted speaker 100 shown in FIG. 7 has a passive radiator 121 on the opening side of a housing 101 and front panels provided with speaker units 131 and 131 on both left and right sides of the passive radiator 121 in a front view. 111 is provided. The passive radiator mounted speaker 100 includes a rear panel 112 on the opposite side (back side) to the front panel 111. The rear panel 112 includes the passive radiator 122 of the same type at a position facing the passive radiator 121 on the front panel 111 side. As described above, the passive radiator mounting type speaker 100 includes the passive radiators 121 and 122 one on each side of the housing 101. [0005] JP, 2009-232040, A [0006] However, the passive radiator mounting type speaker 100 having the above-described structure has the following problems. When the passive radiator mounting type speaker 100 is placed in a wide space and the front panel 111 side listens to the sound, the sound from the passive radiator 122 on the rear panel 112 side escapes to the rear side, and the front panel 111 side The problem is that it is difficult for the listener to get in the ear. As a result, the volume of the deep bass becomes insufficient. 03-05-2019 2 [0007] The present invention has been made to solve the above-described problems, and a listener who is positioned on the front panel side of a passive radiator mounted speaker provided with a passive radiator on the opposite surface of the speaker housing is back-mounted. The aim is to provide a more powerful bass. [0008] A passive radiator mounting type speaker concerning one embodiment for achieving the abovementioned object makes the 1st passive radiator and the 2nd passive radiator which resonate using air vibration in the housing of a speaker on the opposite side of a housing, respectively. In order to prepare for back-to-back alignment, a reflecting member is provided at a position facing the second passive radiator provided on one of the opposing surfaces at an interval in the outward direction. [0009] In the passive radiator mounted speaker according to another embodiment, the reflecting member may be reciprocally movable from a first position covering the second passive radiator to a second position separating from the second passive radiator. [0010] In a passive radiator mounted speaker according to another embodiment, the reflecting member may also be provided with a parallel reflecting plate parallel to one surface. [0011] In the passive radiator mounted speaker according to another embodiment, the reflecting member also includes a left reflecting plate and a right reflecting plate that reflect the sound from the second passive radiator to the left and right sides of the housing, respectively. good. [0012] In the passive radiator mounting type loudspeaker according to another embodiment, the reflecting member may further include an upper reflecting plate that reflects the sound from the second passive radiator to the upper side of the housing. [0013] 03-05-2019 3 In the passive radiator mounted speaker according to another embodiment, the reflecting member may further include a lower reflecting plate that reflects the sound from the second passive radiator to the lower side of the housing. [0014] According to the present invention, it is possible to provide a listener who is positioned on the front panel side of a passive radiator mounted speaker provided with a passive radiator on the opposite surface of the speaker housing in a backrest, with a more powerful heavy bass than before. [0015] FIG. 1 is a front perspective view (1A) of the passive radiator mounted speaker according to the first embodiment in a state in which the reflection member is pulled backward from the rear panel side, and a rear perspective view in a state of drawing the reflection member ( 1B) shows a front perspective view (1C) of the state where the reflection member is stored toward the rear panel and a rear perspective view (1D) of the state where the reflection member is stored toward the rear panel. FIG. 2 shows a cross-sectional structure of the first passive radiator in a state of being cut at a substantially central portion in the longitudinal direction of the front panel of the speaker of FIG. FIG. 3 is a rear perspective view (3A) of the passive radiator mounted speaker according to the second embodiment in which the reflecting member is accommodated toward the rear panel, and the rear perspective view of the reflecting member drawn backward (3B) Rear perspective view (3C) of the state which changed each angle of the left side reflecting plate and the right side reflecting plate from the state of (3B) and (3B) is each shown. FIG. 4 is a rear perspective view (4A) of the passive radiator mounted speaker according to the third embodiment in which the reflecting member is accommodated toward the rear panel, and the rear perspective view of the reflecting member drawn backward (4B) The rear perspective view (4C) of the state which changed the angle of the upper side reflecting plate from the state of (4 B) and (4 B) is shown, respectively. 03-05-2019 4 FIG. 5 is a front perspective view (5A) of the passive radiator mounted speaker according to the fourth embodiment with the reflecting member pulled out toward the rear, a rear perspective view (5B) with the reflecting member drawn out, The front perspective view (5C) of the state which accommodated the reflective member toward the rear surface panel, and the rear perspective view (5D) of the state which accommodated the said reflective member toward the rear surface panel are shown, respectively. FIG. 6 is a front perspective view (6A) of the passive radiator mounted speaker according to the fifth embodiment with the reflecting member pulled out toward the rear, a rear perspective view (6B) with the reflecting member drawn out, The front perspective view (6C) of the state which accommodated the reflective member toward the rear surface panel, and the rear perspective view (6D) of the state which accommodated the said reflective member toward the rear surface panel are shown, respectively. FIG. 7 shows a front perspective view (7A) and a rear perspective view (7B) of a speaker equipped with a conventionally known passive radiator. [0016] Hereinafter, each embodiment of a passive radiator loading type loudspeaker concerning the present invention is described, referring to drawings. [0017] First Embodiment FIG. 1 is a front perspective view (1A) of the passive radiator mounted speaker according to the first embodiment in a state in which the reflecting member is pulled backward from the rear panel side, the reflecting member is pulled out A rear perspective view (1B) of the state, a front perspective view (1C) of a state in which the reflecting member is stored toward the rear panel, and a rear perspective view (1D) in a state of storing the reflecting member toward the rear panel; It shows each. [0018] The passive radiator mounting type speaker (hereinafter, simply referred to as a "speaker") 1 is provided with a housing 10 which has a substantially rectangular parallelepiped shape and which has a space therein. 03-05-2019 5 The housing 10 includes a front panel 11 provided on one of six surfaces of the housing 10 (here, also referred to as front ), and a surface facing the front panel 11 (here, also referred to as rear ). And the rear panel 12 provided in FIG. As main materials of the housing 10, polyamide, polypropylene, polyethylene terephthalate, acrylic resin, polybutylene terephthalate, polycarbonate, polyphenylene sulfide, ABS resin and the like can be suitably exemplified. Among the above resins, a particularly preferred resin is polycarbonate. The housing 10 may be made of FRP in which glass fiber, carbon fiber, etc. are dispersed in the above-mentioned resin. Furthermore, the housing 10 may be made of metal such as aluminum or wood. The same applies to the following embodiments. [0019] The front panel 11 mounts the first passive radiator 21 substantially at the center of the front panel 11 and one speaker unit 31 on each of the left and right sides of the first passive radiator 21 in front view. . The first passive radiator 21 and the speaker units 31, 31 are embedded in the through holes of the front panel 11 so that the side outputting the sound is directed outward. [0020] On the other hand, the rear panel 12 mounts the second passive radiator 22 in a substantially central portion in a front view toward the rear panel 12. The second passive radiator 22 is embedded in the through hole of the rear panel 12 so that the side outputting the sound is directed outward. In the first embodiment and each of the subsequent embodiments, the second passive radiator 22 has substantially the same shape as the first passive radiator 21. However, the second passive radiator 22 may have a size, shape or structure different from that of the first passive radiator 21. The first passive radiator 21 and the second passive radiator 22 are both speaker units that resonate using air vibration in the housing 10 of the speaker 1. The speaker 1 is provided with a first passive radiator 21 and a second passive radiator 22 on the opposite surface of the housing 10 in a back-to-back manner. The configuration of the first passive 03-05-2019 6 radiator 21 and the second passive radiator 22 will be described later. [0021] The speaker 1 is provided with a reflecting member 40 at a position facing the second passive radiator 22 with an interval in the outward direction. The reflective member 40 is preferably reciprocable from a first position covering the second passive radiator 22 to a second position away from the second passive radiator 22. The reflection member 40 is a substantially L-shaped plate-like member, and connects the parallel reflection plate 41 parallel to the rear panel 12 and the substantially horizontal bottom plate 42 which can be stored and drawn on the bottom surface of the speaker 1 at substantially a right angle It will When the reflecting member 40 is moved to the first position, the bottom plate 42 almost overlaps the bottom of the housing 10. The parallel reflection plate 41 covers the second passive radiator 22 and is in contact with the rear panel 12. The parallel reflection plate 41 is preferably a plate having a larger area than the second passive radiator 22 so as to completely cover the second passive radiator 22. [0022] When the reflecting member 40 is moved to the second position, the bottom plate 42 is pulled back from the bottom of the housing 10. In addition, the parallel reflection plate 41 is separated from the rear panel 12 by a predetermined distance while maintaining substantially parallel to the second passive radiator 22. As a result, the sound output from the second passive radiator 22 reaches the parallel reflection plate 41, is reflected by the parallel reflection plate 41, turns forward, and is transmitted to the ear of the listener facing the front panel 11. The main material of the reflecting member 40 can be selected from the above-mentioned candidates for the main material of the housing 10. The reflecting member 40 is preferably made of a material that does not easily resonate. The parallel reflection plate 41 may attach rubber, felt, sponge or paper to the surface facing the second passive radiator 22 to obtain a reflected sound obtained by cutting a sound of a specific frequency. About the above-mentioned material or composition of reflecting member 40, it is the same also in various reflecting members 40a, 40b, 40c, and 40d in each subsequent embodiment. [0023] The reflecting member 40 may be configured to be separable from the housing 10, and in this 03-05-2019 7 case, the bottom plate 42 may be configured to be detached from the bottom of the housing 10. In addition, the reflecting member 40 may be configured not to be easily separated from the housing 10, in which case the bottom plate 42 is provided with a stopper for holding the tip portion of the bottom plate 42 at the bottom of the housing 10 It is good. The reflection member 40 is configured to be able to adjust the distance between the parallel reflection plate 41 and the second passive radiator 22. Therefore, by adjusting the distance, the output of the reflected sound is changed to thereby output the desired tone to the listener. It can be done. [0024] FIG. 2 shows a cross-sectional structure of the first passive radiator in a state of being cut at a substantially central portion in the longitudinal direction of the front panel of the speaker of FIG. [0025] Here, each structure of the first passive radiator 21 and the front panel 11 will be described. In addition, since the 2nd passive radiator 22 is the same structure as the 1st passive radiator 21, only the structure of a 1st passive radiator is demonstrated here, and the overlapping description is abbreviate ¦ omitted. Moreover, FIG. 2 shows a state in which the speaker units 31, 31 are removed. The following contents of the first passive radiator 21 and the front panel 11 are the same in the following embodiments. [0026] The first passive radiator 21 includes a diaphragm 50 disposed substantially at the center of the inside thereof, and an elastic flange 51 formed between the outer periphery of the diaphragm 50 and the front panel 11 and having a hollow structure. The diaphragm 50 is made of a metal such as iron, stainless steel or tungsten steel, and more preferably made of a metal having a high specific gravity. As a constituent material of the elastic flange 51, preferably, silicone rubber, urethane rubber, ethylene propylene rubber, butyl rubber, ethylene propylene diene rubber, and nitrile rubber can be mentioned. Also, the elastic flange 51 may be configured using an esterbased, styrene-based, olefin-based or fluorine-based thermoplastic elastomer, a composite thereof, or the like. Among these materials, silicone rubber is particularly preferred. The first passive radiator 21 resonates with the vibration of the speaker units 31 to vibrate the diaphragm 50. In order for the diaphragm 50 to vibrate normally, the elastic flange 51 needs to be 03-05-2019 8 configured to freely vibrate the diaphragm 50 without disturbing the vibration of the diaphragm 50 while holding the diaphragm 50 firmly. . The elastic flange 51 is not limited to one having a hollow structure, and may have a solid structure. [0027] The elastic flange 51 is a component that connects the panel main body 54 forming the main skeleton of the front panel 11 and the diaphragm 50. The elastic flange 51 includes a first flange 52 having a hollow structure, and a second flange 53 positioned closer to the panel main body 54 than the first flange 52. The first flange 52 is a component having a hollow ring shape, and the inside thereof is connected to the diaphragm 50, and the outside thereof is connected to the second flange 53. The second flange 53 is a component having a solid ring shape, and the inside thereof is connected to the first flange 52 and the outside thereof is connected to the panel main body 54. The first flange 52 and the second flange 53 are connected in a thin loop area. For this reason, the diaphragm 50 can vibrate in the front-rear direction with respect to the opening surface of the housing 10 in the free state as much as possible with respect to the second flange 53. [0028] The front panel 11 is provided with a seal member 55 at its outer periphery. The seal member 55 eliminates the gap between the inner peripheral edge of the opening of the housing 10 and the front panel 11 and contributes to bringing the front panel 11 into close contact with the opening of the housing 10. As a result, the vibration of the air in the case 10 is unlikely to leak to the outside of the case 10 and is reliably transmitted to the first passive radiator 21 and the second passive radiator 22. [0029] Second Embodiment Next, a passive radiator mounted speaker according to a second embodiment will be described. In the second embodiment, parts in common with the first embodiment will be substituted by the descriptions in the first embodiment, and duplicate descriptions will be omitted. 03-05-2019 9 [0030] FIG. 3 is a rear perspective view (3A) of the passive radiator mounted speaker according to the second embodiment in which the reflecting member is accommodated toward the rear panel, and the rear perspective view of the reflecting member drawn backward (3B) Rear perspective view (3C) of the state which changed each angle of the left side reflecting plate and the right side reflecting plate from the state of (3B) and (3B) is each shown. [0031] The configurations of the inner and outer surfaces of the housing 10 of the speaker 1 are common to those of the first embodiment. The speaker 1 is provided with a reflecting member 40 a at a position facing the second passive radiator 22 with an interval in the outward direction. The reflecting member 40 a is preferably reciprocally movable from a first position covering the second passive radiator 22 to a second position separating rearward from the second passive radiator 22. The reflecting member 40 a is a substantially L-shaped plate-like member, and includes a left reflecting plate 61 and a right reflecting plate 62 capable of covering the second passive radiator 22 in the stored state. In this embodiment and the following embodiments, the left side is referred to as "left side" and the right side is referred to as "right side" toward the rear panel 12, unless otherwise stated. The left reflecting plate 61 is rotatable at least rearward about an axis 64 on the right side thereof. In addition, the right reflecting plate 62 can be pivoted at least rearward about an axis 65 on the left side thereof. Here, since it is at least , the left reflector 61 and / or the right reflector 62 may be rotatable both backward and forward around the axis 64 and / or the axis 65. [0032] The shaft 64 and the shaft 65 preferably stand close to each other and substantially perpendicularly to the substantially central portion in the left-right direction of the plate formed of the left reflector 61 and the right reflector 62. The shaft 64 and the shaft 65 are rotatably connected at substantially right angles with respect to a substantially horizontal bottom plate 63 which can be stored and drawn at the bottom of the speaker 1. The bottom plate 63 is a plate corresponding to the bottom plate 42 of the first embodiment. When the reflecting member 40 a is moved to the first position, the bottom plate 63 substantially overlaps the bottom of the housing 10. The left reflector 61 and the right reflector 62 cover the second passive radiator 22 and are in contact with the rear panel 12. The plate formed of the left side reflector 61 and the 03-05-2019 10 right side reflector 62 is preferably a plate having a larger area than the second passive radiator 22 so as to completely cover the second passive radiator 22. [0033] When the reflecting member 40 a is moved to the second position, the bottom plate 63 is pulled back from the bottom of the housing 10. Further, the left reflector 61 and the right reflector 62 are separated from the rear panel 12 by a predetermined distance while maintaining substantially parallel to the second passive radiator 22. From this state, as shown in (3C), the left reflector 61 is rotated backward about the axis 64 (that is, in the direction opposite to the hand of the watch when the axis 64 is viewed from above), and the right reflector 62 is The sound output from the second passive radiator 22 is transmitted to the left reflector 61 and the right reflector 62 when rotated backward about the axis 65 (that is, in the same direction as the hand of the watch when the After reaching, it is reflected, turns to the left and right of the housing 10, and is transmitted to the ear of the listener facing the front panel 11. The main material of the reflecting member 40a can be selected from the above-mentioned candidates of the main materials of the housing 10 described above. The reflecting member 40a is preferably made of a material that is difficult to resonate. The left reflector 61 and the right reflector 62 may be made of rubber, felt, sponge or paper attached to the surface facing the second passive radiator 22 to obtain a reflected sound with a specific frequency cut. good. [0034] The reflecting member 40 a may be configured to be separable from the housing 10, and in this case, the bottom plate 63 may be configured to be detached from the bottom of the housing 10. The reflecting member 40a may be configured not to be easily separated from the housing 10. In that case, the bottom plate 63 is provided with a stopper for holding the tip portion of the bottom plate 63 at the bottom of the housing 10. It is good. The reflecting member 40 a includes a left reflecting plate 61 and a right reflecting plate 62 that reflect the sound from the second passive radiator 22 to the left and right sides of the housing 10 respectively. Furthermore, the left reflector 61 and the right reflector 62 are configured to be adjustable in angle. Therefore, in addition to the effect of the first embodiment, the speaker 1 can change the wraparound path of the reflected sound by the adjustment, and according to the size of the room, the distance between the listener and the speaker 1, etc. There is also an effect that the output of the deep bass can be changed. 03-05-2019 11 [0035] Third Embodiment Next, a passive radiator mounted speaker according to a third embodiment will be described. In the third embodiment, the parts in common with the previous embodiments are substituted by the descriptions in the previous embodiments, and duplicate explanations are omitted. [0036] FIG. 4 is a rear perspective view (4A) of the passive radiator mounted speaker according to the third embodiment in which the reflecting member is accommodated toward the rear panel, and the rear perspective view of the reflecting member drawn backward (4B) The rear perspective view (4C) of the state which changed the angle of the upper side reflecting plate from the state of (4 B) and (4 B) is shown, respectively. [0037] The configurations of the inner and outer surfaces of the housing 10 of the speaker 1 are common to those of the first embodiment. The speaker 1 is provided with a reflecting member 40 b at a position facing the second passive radiator 22 with an interval in the outward direction. The reflecting member 40 b is preferably reciprocally movable from a first position covering the second passive radiator 22 to a second position separating rearward from the second passive radiator 22. The reflecting member 40 b is a substantially L-shaped plate-like member, and has a configuration similar to that of the reflecting member 40 in the first embodiment. Unlike the reflecting member 40, the reflecting member 40b includes an upper reflecting plate 71 that reflects the sound from the second passive radiator 22 to the upper side of the housing 10. Further, the upper reflecting plate 71 is rotatable at least rearward from a state perpendicular to the bottom plate 72 (a plate corresponding to the bottom plate 42 in the first embodiment). Here, since it is at least , the upper reflection plate 71 may be rotatable also on the housing 10 side. The parallel reflection plate 41 of the reflection member 40 is fixed to the bottom plate 42 in a fixed angle, but the upper reflection plate 71 of the reflection member 40 b is provided to be variable in angle to the bottom plate 72. In order to realize this operation, the upper reflection plate 71 is held by the bottom plate 72 so as to be rotatable about an axis 70 extending substantially horizontally. The upper reflecting plate 71 preferably has a larger area than the second passive radiator 22, and the bottom plate 72 may or may not be easily separated from the housing 10. Common to the 03-05-2019 12 first embodiment. The upper reflecting plate 71 may be made of a rubber, felt, sponge or paper attached to the surface facing the second passive radiator 22 to obtain a reflected sound obtained by cutting a sound of a specific frequency. [0038] The reflecting member 40 b can rotate the upper reflecting plate 71 backward to turn the surface of the upper reflecting plate 71 facing the rear panel 12 upward, and the angle thereof can also be adjusted. Therefore, in addition to the same effects as those of the first embodiment, the speaker 1 can change the upward routing path of the reflected sound, and according to the size of the room, the distance between the listener and the speaker 1, etc. There is also an effect that the output of the deep bass can be changed. [0039] Fourth Embodiment Next, a passive radiator mounted speaker according to a fourth embodiment will be described. In the fourth embodiment, the parts in common with the previous embodiments are substituted by the descriptions in the previous embodiments, and duplicate descriptions are omitted. [0040] FIG. 5 is a front perspective view (5A) of the passive radiator mounted speaker according to the fourth embodiment with the reflecting member pulled out toward the rear, a rear perspective view (5B) with the reflecting member drawn out, The front perspective view (5C) of the state which accommodated the reflective member toward the rear surface panel, and the rear perspective view (5D) of the state which accommodated the said reflective member toward the rear surface panel are shown, respectively. [0041] The configurations of the inner and outer surfaces of the housing 10 of the speaker 1 are common to those of the first embodiment. 03-05-2019 13 The speaker 1 is provided with a reflecting member 40c at a position facing the second passive radiator 22 with an interval in the outward direction. The reflecting member 40 c is preferably reciprocally movable from a first position covering the second passive radiator 22 to a second position separating rearward from the second passive radiator 22. Unlike the reflective member 40 in the first embodiment, the reflective member 40c is not a substantially L-shaped plate-like member. The reflection member 40 c includes a parallel reflection plate 81 corresponding to the parallel reflection plate 41 in the first embodiment, and rods 82 and 82 connecting the parallel reflection plate 81 and the rear panel 12. The parallel reflection plate 81 may attach rubber, felt, sponge or paper to the surface facing the second passive radiator 22 so as to obtain a reflected sound obtained by cutting a sound of a specific frequency. The rods 82, 82 are inserted into the holes 83, 83 formed from the rear surface panel 12 toward the inside of the housing 10, and the distance between the parallel reflection plate 81 and the rear surface panel 12 can be varied freely. It is possible to move in 83. [0042] As described above, the parallel reflection plate 81 can be disposed to face the second passive radiator 22 using the rods 82 and 82 instead of the bottom plate 42 of the first embodiment. Since the speaker 1 does not include the bottom plate 42, in addition to the same effect as the first embodiment, the sound from the second passive radiator 22 is reflected by the parallel reflection plate 81 and then transmitted to the bottom of the housing 10 as well. It also has the effect of being able to If the bottom of the speaker 1 is installed so as not to be in full contact with the floor, the sound from the second passive radiator 22 can be transmitted to the listener's ear located on the front panel 11 side via the bottom of the housing 10 as well. . [0043] Fifth Embodiment Next, a passive radiator mounted speaker according to a fifth embodiment will be described. In the fifth embodiment, the parts in common with the previous embodiments are substituted by the descriptions in the previous embodiments, and duplicate descriptions are omitted. [0044] FIG. 6 is a front perspective view (6A) of the passive radiator mounted speaker according to the fifth embodiment with the reflecting member pulled out toward the rear, a rear perspective view (6B) with the reflecting member drawn out, The front perspective view (6C) of the state which 03-05-2019 14 accommodated the reflective member toward the rear surface panel, and the rear perspective view (6D) of the state which accommodated the said reflective member toward the rear surface panel are shown, respectively. [0045] The configurations of the inner and outer surfaces of the housing 10 of the speaker 1 are common to those of the first embodiment. The speaker 1 includes a reflecting member 40 d at a position facing the second passive radiator 22 at an interval in the outward direction. The reflecting member 40 d is preferably reciprocally movable from a first position covering the second passive radiator 22 to a second position separating rearward from the second passive radiator 22. The reflection member 40d does not include a plate corresponding to the bottom plate 42 as the reflection member 40c in the fourth embodiment, but includes rods 92 and 92 and a reflection plate 91 connected to the rods 92 and 92. The rods 92, 92 are inserted into the holes 93, 93 formed from the rear surface panel 12 toward the inside of the housing 10, and the distance between the reflecting plate 91 and the rear surface panel 12 can be varied freely. It is possible to move inside. [0046] The reflection plate 91 is a bending plate in which the upper reflection plate 95 and the lower reflection plate 96 are connected in the vertical direction by the boundary line 94. The upper reflection plate 95 is an obliquely upward plate inclined rearward from the vertically upward direction at the boundary line 94. The lower reflector 96 is an obliquely downward plate which is inclined rearward from the vertically downward direction at the boundary line 94. The upper reflection plate 95 is a plate that reflects the sound from the second passive radiator 22 to the upper side of the housing 10. The lower reflection plate 96 is a plate that reflects the sound from the second passive radiator 22 to the lower side of the housing 10. The upper reflector 95 and the lower reflector 96 are made of rubber, felt, sponge or paper attached to the surface facing the second passive radiator 22 so as to obtain a reflected sound obtained by cutting a sound of a specific frequency. Also good. [0047] 03-05-2019 15 As described above, since the speaker 1 does not include the bottom plate 42 and includes the upper reflection plate 95 and the lower reflection plate 96, the sound from the second passive radiator 22 is reflected by both reflection plates 95 and 96. Afterward, it can be effectively transmitted to both the upper side and the lower side (= bottom) of the housing 10. Therefore, in addition to the same effect as that of the first embodiment, the speaker 1 has a reflected sound from the second passive radiator 22 of the second passive radiator 22 as compared with the reflection member 40 c having the parallel reflection plate 81 in the fourth embodiment. It also has the effect of easily reaching the listener without being affected. [0048] (Other Embodiments) The speaker 1 according to each embodiment of the present invention has been described above, but the present invention is not limited to these embodiments, and can be implemented with various modifications. [0049] The speaker 1 according to each of the above-described embodiments includes one first passive radiator 21 and one second passive radiator 22, but may include a plurality of first passive radiators 21 or second passive radiators 22. The reflecting members 40, 40a, 40b, 40c, and 40d (referred to as "reflecting members 40 and the like") are configured such that the distance between the housing 10 and the second passive radiator 22 is variable. And may be fixed to the housing 10 in a state in which the distance between the However, when the reflective member 40 and the like can be stored in the rear panel 12 side of the housing 10, it is advantageous when the speaker 1 is carried. [0050] The reflecting members 40 and the like can change the distance steplessly from the position closest to the rear panel 12 (first position) to the position farthest (second position). However, the reflecting member 40 or the like may be a member capable of changing the distance stepwise. The left reflector 61 and the right reflector 62 can rotate steplessly around the axes 64 and 65, respectively, but the angles may be changed stepwise. The reflecting plate 91 is a plate in which each angle with respect to the vertical direction of the upper reflecting plate 95 and the 03-05-2019 16 lower reflecting plate 96 is fixed, but similarly to the left reflecting plate 61 and the right reflecting plate 62 in the third embodiment, Each angle may be variable. [0051] In the fourth embodiment, the parallel reflection plate 81 may not be fixed to the rods 82, and may be configured to be variable in angle in the upward and / or downward directions with respect to the rods 82, 82. For example, the angle variable configuration can be realized by providing a ball at each end of the rods 82 and 82 and providing the parallel reflection plate 81 with a recess that surrounds the ball in a non-fixed manner. Further, in the fifth embodiment, the reflecting plate 91 may be configured to be variable in the upward and / or downward direction with respect to the rods 92, 92 without being fixed to the rods 92, 92. As described above, by providing a ball at each end of the rods 92 and 92 and by providing the reflecting plate 91 with a recess that surrounds the ball in a non-fixed manner, the variable angle configuration can be realized. [0052] Each of the above-described embodiments can arbitrarily combine some of their configurations except in the case where they can not be combined. As an example, the speaker 1 may be provided with a reflecting member including the parallel reflecting plate 41, the left reflecting plate 61, and the right reflecting plate 62 by combining the first embodiment and the second embodiment. In addition, as another example, combining the second embodiment and the fifth embodiment, the left reflector plate 61 and the left reflector plate 61 are disposed on the left and right of the reflector 91 (a plate composed of the upper reflector 95 and the lower reflector 96). The speaker 1 may be provided with a reflection member provided with the right reflection plate 62 respectively. [0053] The present invention can be used for a speaker, particularly a small speaker. [0054] DESCRIPTION OF SYMBOLS 1 ... Speaker (passive radiator mounted type speaker) 10 ... Housing ¦ casing 11 ... Front panel (one of opposing surfaces) 12 ... Rear panel (It is one of opposing surfaces, 21: first passive radiator, 22: second passive radiator, 40, 40a, 40b, 40c, 40d: reflecting 03-05-2019 17 member, 41, 81: parallel reflecting plate, 61: left reflector, 62: right reflector, 71, 95: upper reflector, 96: lower reflector. 03-05-2019 18
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