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 JPS60103798 [0001] FIELD OF THE INVENTION The present invention relates to a displacement-type bone conduction microphone, and more particularly to a displacement-type bone-conduction microphone in which an electroacoustic transducer is broken. (Prior Art) First, a conventional displacement microphone will be described. FIG. 1 shows an external perspective view of a conventional displacement-type bone conduction microphone. FIG. 2 is a perspective view of FIG. 1 with one damper member removed. As shown in FIG. 2, a strip-shaped electroacoustic transducer 2 such as a bimorph made of a piezoelectric member such as barium titanate magnet is implanted in the support member 1. A lead wire 3 is electrically connected to an end of the electro-acoustic transducer 2 on the support member 1 side, and the lead wire 3 penetrates the support member 1 and is led to the outside of the microphone ing. The other end of the electroacoustic transducer 2 is an open end. As shown in FIG. 1, a cylindrical damper partial wing 4 formed of a silicon mold or another rubber-like material is provided around the strip-shaped electroacoustic transducer 2. There is. The diameter of the circular cross section perpendicular to the central axis of the damper member 4 is formed to be approximately the same as or slightly smaller than the diameter of the ear hole, and the damper member 4 can be inserted into the ear hole There is. In the displacement-type bone conduction microbon having the above structure, when the microbon is inserted into the ear canal, the damper member 4 is flexed by the bone conduction sound transmitted to the ear canal, whereby the electroacoustic transducer 2 also flex. For this purpose, the bone conduction sound is converted by the electroacoustic transducer 2 into an electrical signal, which is sent via the lead 3 to a not shown subsequent device connected thereto. This conventional displacement-type bone-conduction microphone has a merit that it picks up only the bone conduction sound well, is completely insensitive to air vibration noise such as noise, and is hard to cause howling. However, since the electroacoustic transducer is mechanically fragile, there is a drawback that it is necessary to pay sufficient care in handling so as not to break by 04-05-2019 1 applying unnecessary external force. Therefore, the inventor made a prototype of a displacement-type bone conduction microphone having a structure in which << the electroacoustic transducer as shown in FIG. 3 was broken. That is, three non-flexible piano wires 5a, 5b and 5c7i are set up at three points on the support member 1 and around the electroacoustic transducer 20, and they are molded with silicon resin so as to wrap them. , The damper 1 member 4 was formed. According to this prototype example, even if an unnecessary external force is applied to the first damper member 4, the first damper member 4 is reinforced by the three piano wires 5a, sb + and 5c, and therefore does not bend. Therefore, the sound-to-acoustic transducer 2 is also not distorted by the external force and the destruction is prevented. However, in the displacement type bone conduction microphone of this structure, the piano wire is effectively used as an auxiliary vibrator because the piano wire is not deformed too hard and the piano wire and the electroacoustic transducer are separated. Because it is not done, there is a drawback that the sensitivity to big-amp bone conduction noise is low. There is also a conventional device in which the electroacoustic transducer is molded with a damper material such as resin and the outside is covered with a cylindrical hard metal. In this conventional device, the cylindrical metal is too hard to vibrate. In addition, since it does not work effectively as a vibrator, it has the same disadvantages as described above. (Objective) The object of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to provide a displacement-type bone conduction microphone capable of sufficiently picking up an electric sound transducing sound <<<, the electroacoustic transducer is broken. It is to do. (Summary) A feature of the present invention is a displacement type bone having a strip-shaped electroacoustic transducing element implanted on one end face of a support member, and a damper member formed so as to enclose the electroacoustic transducing element. In the microphone, a flexible reinforcing member is disposed around or in the vicinity of the electroacoustic transducer, and the open end of the electro-acoustic transducer and the tip of the reinforcing member are fixed or placed close to each other. The point is that the periphery of the electro-acoustic transducer and the reinforcing member is wrapped with the damper member, and the reinforcing member is used as a main body or an aid for reinforcement and vibration detection of the electro-acoustic transducer. EXAMPLES The present invention will be described below by way of examples. FIG. 4 shows a perspective view of the structure of the first embodiment O of the present invention. In the figure, 6 has one end engaged with the projection 1 a of the support member 1, the central part encases the periphery of the electroacoustic transducer 20, and the other end fixed to the open end of the electroacoustic transducer 2 or near the open end 2 shows a coil spring, such as metal or plastic, which is arranged. The other reference numerals indicate the same as in FIG. 5 and 6 show enlarged side views in the vicinity of the open end of the electroacoustic transducer 2. FIG. FIG. 5 shows an example in which the other end of the coil spring 6 is wound around the open end 8 of the electroacoustic transducer 2. The other end of the coil spring 6 may be fixed to the open end of the electroacoustic transducer 2 by soldering or by a resin or the like having a large hardness, or may be disposed 04-05-2019 2 close to each other without being fixed. Further, FIG. 6 shows an example in which the other end of the coil spring 6 is placed on the extension of the electroacoustic transducer 2. Also in this case, as described above, the other end of the coil spring 6 may be fixed to the open end of the electroacoustic transducer 2 or may be disposed close to each other. The rigidity of the coil spring 6 determined by the pitch, material, thickness, etc. is combined with the rigidity of the molding material as the core material, and a person exerts a force in the radial direction with a finger and does not crush even if crushed. The force in the direction perpendicular to the axis is bent acoustically and is sized to transmit bone conduction noise. The structure of FIG. 4 configured as described above is immersed in a liquid silicon resin placed in a cylindrical mold, and then hardened to form a damper member that covers the coil spring 6. As a result, a displacement-type bone-conduction microphone shaped as shown in FIG. 1 in appearance is produced. As another manufacturing method of this embodiment, there are the following methods. A through hole through which the support member 1 and the protrusion 1aK electroacoustic transducer 2 can be inserted is opened. First, as shown in FIG. 4, one end of the coil spring 6 is locked to the projection 1a. Next, secure a hole in the central portion of the coil spring 6 into which the electroacoustic transducer 2 can be inserted, fill and cover the inside and the outside of the coil spring 6 with silicon, harden the silicon, and partially damper Form Thereafter, the electroacoustic transducer 2 is inserted into the hole secured in the central portion of the coil spring 6 through the through holes of the support member 1 and the projection 1a. Subsequently, in order to increase the sensitivity, a silicon adhesive or the like is poured into the gap between the electroacoustic transducer and the hole of the damper one member to fill the gap between the electroacoustic transducer and the damper one member. In addition, for mechanical protection of the electroacoustic transducer 2, it is good not to fill this gap but to leave a gap between the two. According to the displacement-type bone conduction microphone of this embodiment, the coil spring 6 is provided around the electroacoustic transducer 2 and the damper member 4 is interposed between the coil springs 60. Stiffness is enhanced. For this reason, even if an external force such as bending, twisting or axial pushing is applied while the electroacoustic transducer 2 is reinforced, a large force is not applied to the electroacoustic transducer 2 in the coil spring 6, and the electroacoustic transducer There is an effect that damage to the element can be prevented. Moreover, according to the present embodiment, the bone conduction outer ear vibration is replaced by a coil spring having a large vibration area, which is a primary vibration system, via the damper member 4, and the electroacoustic transducer 2 which is a second vibration system. The vibration is transmitted to the tip. Thereby, an output as large as that of the microphones of FIGS. 1 and 2 can be obtained. When a coil spring made of metal is used in this embodiment, it has the effect of shielding extraneous electromagnetic waves and shielding electrical noise. FIG. 7 shows a modification of the present embodiment. In this modification, a square coil spring 04-05-2019 3 6 'is used instead of the cylindrical coil spring 6 of the first embodiment. This modification also has the same effect as that of the first embodiment. The shape of the coil spring 6.6 'is not limited to a spiral whose cross section perpendicular to the central axis is a circle or a square, and the cross section may be another shape such as an ellipse or a triangle. 8 and 9 show a second embodiment of the present invention. 8 shows a perspective view, and FIG. 9 shows a perspective view of FIG. 8 as seen from the open end direction of the electroacoustic transducer 2. As shown in FIG. In the figure, the same reference numerals as in FIG. 1.2 indicate the same or equivalent. It is to be noted that, in FIG. 8, the damper 1 member 4 is indicated by a broken line in order to make the description easy. In this embodiment, an electroacoustic transducer 2 and an elongated reinforcing member 7 formed of a V-shaped cross section are embedded in the projection 1a of the supporting member 1, and the reinforcing member 7 is bent in the middle. The open ends of the two are opposed to each other, and then the opposite part is soldered or fixed with a hard resin as required. Note that the facing portions do not adhere, and may be disposed so as to be close to each other with a slight gap. The thickness or strength of the reinforcing member 7 of the phosphor bronze plate is a thickness or strength which does not significantly bend even when a force is applied with a human finger in a V-shaped or U-shaped state, and acoustically The strength is chosen to be flexible enough. Therefore, even if the microphone is roughly handled, it is not easily damaged. Further, in this embodiment, the bone conduction outer ear vibration is transmitted to the electroacoustic transducer 2 directly or through the damper member 4, and the reinforcing member 7 supplementarily carries the bone conduction sound at the open end thereof. Transmit vibration to Therefore, good efficiency (, bone conduction sound is picked up. The tenth @ shows a modification of the present embodiment, and shows an enlarged perspective view of the vicinity of the open end of the electroacoustic transducer 2 and the facing portion of the reinforcing member 70. In this modification, an opening 8 is provided in the vicinity of the open end of the reinforcing member 7, and the open end of the electroacoustic transducer 2 is located in the opening 8. In the microphones of FIGS. 8 and 10, when the damper member 4 is provided in the range of the electroacoustic transducer 2td and the reinforcing member 7, the electroacoustic transducer 2 and the reinforcing member 7 are mounted on the support member 1 as described above. It may be made by immersing it in a liquid silicone resin contained in a suitable mold and solidifying it, or the reinforcing member 7 is planted on the support member 1 After that, a hole sufficient for the electroacoustic transducer 2 to enter is secured to form a cylindrical damper member 4 of silicon resin, and thereafter, the support member IK is formed into strips from the through holes previously formed with the IK shadow. Shaped electro-acoustic room. The replacement element 2 may be inserted. In addition, although the example which provided only one reinforcement member 7 of a phosphor bronze board is shown by FIG. 8, it is not limited to one but you may provide multiple reinforcement members of the same shape. Although the example which bent the reinforcement member 7 of a phosphor bronze board was shown in the example, it is needless to say that you may curve. A third embodiment of the 04-05-2019 4 present invention is shown in FIG. In the figure, the same reference numerals as in FIGS. 1 and 2 denote the same or equivalent parts as those in these figures. A feature of this embodiment is that a large number of slits 10 cut in the circumferential direction around the electroacoustic transducer 2. It is a point surrounded by a thin brass or the like made of a thin brass or the like 10 having a hole of 10 'or other shape and filled and covered with a damper member 4 made entirely of a silicon resin. The slit 10 ′ is provided substantially symmetrically with the slit 10 with respect to the center line of the cylindrical body 9. Therefore, when a force in the left and right direction (arrows a and b in the figure) is applied to the damper member 4, bending occurs in the same direction. This deflection is transmitted to the electroacoustic transducer 2 through the rod member 11 fixed at one end fixed at the open end of the cylindrical body 9 in the diameter direction. Therefore, the bone conduction sound transmitted from the ear canal can be picked up well. Further, since the electro-acoustic transducer 2 is surrounded by the cylindrical body 9, the deflection is small even if the unnecessary outer side is added, so it is not broken. FIG. 12 shows a perspective view of a fourth embodiment of the present invention. In this figure, the same reference numerals as in FIGS. 1 and 2 indicate the same or equivalent. A feature of this embodiment is that the periphery of the electroacoustic transducer (not shown) is covered with a fibrous sleeve 2 made of metal or glass fiber mesh or the like, and the inner and outer sides of the sleeve 12 are made of silicone resin. It is molded by the member 4. In this embodiment, since the electroacoustic transducer is covered with the fibrous sleeve 12 and the silicone resin, it does not cause a large deflection even under a large external force. Therefore, it becomes difficult to be destroyed by external force. On the other hand, with respect to bone conduction sound, the fibrous sleeve and the electroacoustic transducer covered with silicone resin should be sufficiently bent to the extent that the bone conduction sound is converted into an electric signal and be picked up with high sensitivity. Can. In addition, the third. In the fourth embodiment, the cylindrical body 9 and the fibrous sleeve 12 may have an elliptical cross section perpendicular to the central axis. Also, when the cylindrical body 9 and the fibrous sleeve 12 are made of metal and metal mesh, it has the effect of shielding extraneous electromagnetic waves and shielding electrical noise. The microphone of each of the above-described embodiments is covered with a damper member having an impedance similar to the mechanical impedance of the outer ear guiding wall, so that when the microphone is mounted on the outer ear guiding wall, the bone conduction sound is damped from the outer ear guiding wall It is transmitted to one member almost without reflection. Because of this, there is no loss of bone conduction energy. Therefore, bone conduction sound is efficiently transmitted from the outer ear wall to the microphone. Next, the bone conduction sound is picked up by the prototype displacement bone conduction microphone shown in FIG. 3, the microphone of the first embodiment of the present invention of FIG. 4, and the microphone of the second embodiment of FIG. FIGS. 13 and 14 show waveform diagrams of the electric signal output as measured by the synchroscope. The A and B views of FIG. 13 are shown by the microphones of FIGS. 8 and 3, respectively. The wave form diagram of the electric 04-05-2019 5 signal output at the time of picking up the bone conduction sound of "oh, yeah, yes" is shown. Also, FIGS. 14A and 14 are waveform diagrams of the electric signal output when the bone conduction sound of [う, 、, 、, い] is picked up by the microphones of FIGS. 8 and 4, respectively. Indicates Referring to FIGS. 13 and 14, it can be seen that the prototype microphone according to FIG. 3 has very poor pickup sensitivity of bone conduction sound. Also, it can be seen that the microphone of the first embodiment of FIG. 4 has the best sensitivity, and the sensitivity of the microphone of the second embodiment of FIG. 8 is slightly worse than that of the first embodiment. However, it was found that the microphone of the second embodiment as well as the microphone of the first embodiment has sufficient sensitivity in practical use, and the latter is not inferior to the former in any way. (Effects) As described above, according to the present invention, since the strength of the electroacoustic transducer, which was originally considered as the weak point of the displacement bone conduction microphone, can be sufficiently reinforced, it is possible to deal with some rough handling There is a big effect that it will not be damaged. In addition, there is an effect that the bone conduction sound can be picked up with the same sensitivity as the microphones shown in FIG. 1 and FIG. [0002] Brief description of the drawings [0003] 1 and 2 are an external appearance perspective view of the conventional displacement bone conduction microphone and a perspective view of the microphone with the one member of the damper removed from FIG. 1, respectively, and FIG. 3 is an electroacoustic conversion made by the present inventor. FIG. 4 is a perspective view of the main part of the first embodiment of the present invention, and FIG. 5 and FIG. 6 are the opening of the electroacoustic transducer of the first embodiment. FIG. 7 is a side view showing the relationship between the end and the open end of the coil spring, FIG. 7 is a perspective view of a modification of the first embodiment, and FIGS. 8 and 9 are perspective views of the second embodiment of the present invention. FIG. 10 is a perspective view of an essential part of a modification of the second embodiment, and FIGS. 11 and 12 are a perspective view of the 31st embodiment of the present invention, and FIGS. 13 and 14 respectively. In the figure, the bone conduction sound is picked up by the microphones of FIG. 3, FIG. 4 and FIG. 8 respectively. Shows a waveform diagram of an electrical signal output when the. DESCRIPTION OF SYMBOLS 1 ... Support member, 2 ... Electro-acoustic conversion element, 4 ... One member of dampers, 6.6 '... Coil spring, 7 ... Reinforcement member, 9 ... Cylindrical body, lO. 04-05-2019 6 ... slit, 12 ... fibrous sleeve representative patent attorney flat wood road evildoer FIG. 8 No. 10 Figure 6 1 emissions Figure 7 Figure 5 Figure 4 Figure 3 Figure 2 Figure 1 1 persons Fig. 9 Fig. 11171 Fig. 12 04-05-2019 7
© Copyright 2021 DropDoc