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Description of the Invention An annular electro-acoustic transducer 1, an annular diaphragm
similar to the above-mentioned substrate and qy is supported opposite to the above-mentioned
substrate via a support having elasticity with respect to the annular substrate, An annular
electro-acoustic transducer characterized in that the cough diaphragm is provided with drive
means comprising a voice coil or the like for driving the cough diaphragm. 2. The ring-shaped
electro-acoustic transducer according to the above item 1, wherein the diaphragm is folded at the
one end and the outer end of the diaphragm in the vibration direction of the cough diaphragm.
DETAILED DESCRIPTION OF THE INVENTION The present invention provides an annular electroacoustic transducer suitable for use as a bracelet or as a headphone, and thus a must! Depending
on attaching the circuit of the receiver integrally, it is convenient for carrying and convenient to
use as a bracelet, and 411 can improve the sound quality of high range. It is. Although a radio
receiver that can be used as a bracelet has hitherto been proposed, in this case, even if the entire
receiver casing is expanded, the electric-sound transducer or speaker used for this is small.
However, due to the conventional configuration (the shape is used, the part that accommodates
this speaker needs a certain size so that the K used as a bracelet is totally received There was a
tendency that the production of the machine became large and not preferable. In addition, socalled open type headphones are often used as headphones, and for this reason, a special
construction tube is required to provide a window hole at the part of the ear stop. In view of the
above-described point, the present invention takes into consideration that the above-described
points can be satisfied by making the shape of the entire speaker annular. Hereinafter,
embodiments of the electro-acoustic transducer according to the present invention will be
described with reference to the drawings. That is, as shown in FIGS. 1 to 3, as a whole, it is
formed endlessly, i.e., an annular t-ring, and can be used also as a bracelet. In addition, it is not
limited to the special ring of EndPage: 1. And the direction of the central axis of the rod body (1)
collar ring rod body KIIIL, divided into two parts,-half lli is the upper rod body (2), the other part
is the lower rod body (3) Explain as. Accordingly, the upper and lower housings (2) and (3) are
respectively also in the form of a ring as a whole, and each has a U-shaped cross section. 1st W!
Each enlarged cut 1iir (! Of AA, BB and CC in J and 2nd WJK! lt is shown in FIG. 4, FIG. 5 and FIG.
The upper housing (2) can be formed of a synthetic resin or a metal material, and a wiping sound
hole (4) is formed on the upper surface thereof. The lower housing (3) can also be formed of a
metal material, but may be formed of an insulating material such as a synthetic resin. Between
the junctions of the parent bodies (2) and (3), steps Ka (5) and (6) respectively are formed, and in
the junction state of the parents (2) and (3), these steps (5) and ((6) 6) are fitted to each other.
The above-mentioned steps (#i and further steps (7) are formed on the inner side of 5J of the
upper housing (2), and the substrate (8) serving as the frame (frame) Yt of the receiver is just
fitted -
This substrate (&) has an annular shape similar to the shape of the housing (1), and as will be
apparent from the later description, it is also a mounting substrate for a speaker and other circuit
parts, and also a speaker magnetic circuit. It also serves as a metal magnetic material (eg, soft
iron). Thus, the substrate (8) is located approximately at the bonding surface of the upper and
lower housings (2) and (3). When the surface of the substrate (8) facing the upper housing (2) is
the upper surface and the surface facing the lower housing (3) is the lower surface, the inner and
outer peripheral edges of the lower surface of the substrate (8) Each step is provided with a
tapered surface (9), and with the substrate (8) fitted to the inner step (7), the outer step (5) is
directed inward, ie along the teno-surface (9). Attach the substrate (8) to the upper housing (2)
by bending it into a box. FIGS. 4 to 6 show the state thus engraved, and the company shown by
the dotted line in FIG. 4 still shows the state mt-before folding the stage 5 (5) inward. It is a thing.
In addition, the outer shell O & Is (5) is formed in a wedge shape in advance for this bending, and
when the upper housing (2) is formed of a metal material, it can be performed by so-called
caulking; When it is made of a resin material, it can be deformed by heat release. Furthermore, in
the illustrated example, the inner step (7) is formed in a wedge shape, and both the inner and
outer II edges of the substrate (8) are correspondingly inclined toward the upper crucible,
thereby the substrate When the lower housing (2) is engaged with the lower housing (2), the
protrusion IIQ (IK reduces the width W of the upper housing (2) formed based on the inclination
of the substrate (8), In the case where the upper housing (2) is formed of a synthetic resin, even
if its thickness t is, for example, about 1 mm and tends to be soft, the entire housing can be
hardened by the substrate (8) K . The above-mentioned f5Wf11 mm, the inner diameter of the
casing (11 whole if if 7 mm can be selected. A boss αD as a rod assembly support pillar is
attached to a plurality of locations (6 locations in the illustrated example) at equal angular
intervals when viewed from the central axis of the casing (1) on the lower surface side of the
substrate (8) (See FIG. 5), that is, the substrate (8) K through hole 0 is formed, into which one end
of the boss a is inserted. This end corresponds to the opening slope of the through hole sieve of
the substrate (8). It is attached by caulking. The boss IK of the nut and the other end are formed
with a screw hole a, while the lower housing (3) is provided with a screw insertion hole αcorresponding to these bosses Qn, and this insertion A dispersion village screw Q5 is screwed
into the screw hole (13 and the lower housing (3) is brazed to the substrate (8) through the hole
A speaker σe is formed on the upper surface of the substrate (8) together with the substrate (3).
FIG. 7 is a front view of a state in which the upper housing (2) is removed and a part of the
diaphragm η of the speaker OG is cut away. Also in this drawing, the cross-sectional positions
corresponding to FIGS. 1 and 2 are shown with the same reference numerals. As is apparent from
this, the diaphragm Q71 has an annular shape as a whole as in the case of the housing (1), and
its cross section has an arc shape, and the inner edge (171) and the outer edge (17b) The
direction KWII is substantially perpendicular to the direction (the direction substantially along
the vibration direction of the diaphragm Qη). A coil winding device lllaS for winding a coil in a
direction perpendicular to the center of the imaging plate 17) is connected. Therefore, this coiled
leg has a short cylindrical shape as a whole as a so-called coil bobbin. And EndPage: 2 voice coil
a! J is covered. The support (2) of the diaphragm weir is disposed at substantially equal angular
intervals 't' at the base 11 (a plurality of places on the 81 (K11 1 as shown in this example at 7 @
in this example)). This arrangement position is selected approximately in the middle of the
positions of the respective bosses av described above. As the support {circle over (1)}, an elastic
material tube is used, and a urethane rubber can be used. In this example, the cross-sectional
shape of the support is formed along the diaphragm & 'no shape, and in order to be supported by
the diaphragm (l.eta..pi. It is inserted into a groove (lea) formed on the upper surface, and is
adhered to a support (i) by a coil bobbin ast adhesive. A pair of O11 stones Q11 and (2) are
disposed on the substrate (8) (ie, magnetic type as the speaker ae) with a predetermined gap @ 1
and the coil bobbin 0, that is, the voice coil a9 is interposed between the gaps (2). The magnet (2)
and a21 are to be positioned without contact. The magnets all and (2) are disposed along the coil
bobbin ridge at portions excluding the support cQ of the vibration SaW, and thus the magnet
ridges and (2) are each formed in an arc shape. . Also, as shown in FIGS. 4 to 6, the magnet 0υ
can be formed by mutually superposing a magnet piece (21 having a rectangular cross section)
and a magnet piece (21 b) having a triangular cross section, as shown in FIGS. However, it is not
necessary to separately make them separately as described above, and both (21 m) and (21 b)
can be made in advance as one.
In this case, the end of the surface facing the voice coil 4 and the end of the surface in contact
with the substrate (8) may be magnetized so as to form N and 8 magnetic poles, respectively. The
magnets Qυ and (至) can also be attached to the substrate (8) with an adhesive, respectively, but
they can also be dispersed by means of screws or the like as required. The same applies to the
magnet port (in this example, composed of (221) and <22b) K. It should be noted that under the
substrate (8) through a through hole (not shown) formed in the base m (8) from an appropriate
position between the double-edged magnet (2m1 @ and the support (2)) of the voice coil a9. [K is
derived and connected to the radio receiver's electrical circuit. As mentioned above. The
magnetic circuit 如 き is formed as shown at point 4 110 from the 5K e le magnet 磁石 and 判 る
判 る as can be seen from ろ, and the voice coil に よ っ て is supplied by supplying an
alternating current (low frequency signal charge fIL) to the voice coil 4 9 vibrates in a direction
perpendicular to the direction of the magnetic flux, ie, in a direction along the coil-bobbin axis,
and can be oscillated along the axial direction of the annular diaphragm aηt, and the sound
emission hole of the upper housing (2) Low frequency signals taX such as voice can be obtained
through (4). For example, an adhesive t-4 is printed on the lower surface of the substrate (8) with
an adhesive t-4, and a printed wiring (c) is formed on the upper surface thereof. In this case,
since the substrate (8) is formed of a metal material and has a high hardness, a thin so-called
flexible O 'can be used as the printed wiring board Q. The printed wiring board (2) can also be
formed in an annular shape corresponding to the shape of the base (8), and the printed wiring
board (2) does not exist in the portion facing the boss a. This print E * g! jtlj) An electric circuit or
part ave of a transistor, a semiconductor integrated circuit, a resistor, a capacitor or an
inductance element is dispersed, and a radio receiver is configured in a predetermined circuit
example. The FM antenna is annularly or endlessly formed along the outer surface of the lower
housing 3 and embedded therein. However, some of them may be cut off. Then, as shown in FIG.
4, a lead II @@ is inserted inside through the through hole (2) formed in the lower housing (3)
and is connected to the so-called antenna input terminal of the receiver. AM antenna C [it is
housed at an arbitrary position of the tiT body, but this AM antenna 1 can be obtained as a socalled normal par antenna configuration). 01) is the ferrite core, which is formed in an arc shape
corresponding to the-ratio of the housing (1).
(2)はアンテナコイルである。 Alternatively, as shown in FIG. 9, a part of the substrate (8)
may be provided with a recess-and an antenna coil (end) may be wound around the base to form
a per antenna 0It-. At the inner edge of the lower housing (3), the window holes (s) are sanded at
a plurality of locations (three locations in the example shown in FIG. 2), from which part of the
rotating forceps (2) is exposed to the outside. And it is made to be turned by a fingertip. The
tuning operation is used for the tuning operation or the volume adjustment operation of this
rotary ladder @ wide-radio receiver. The tuning operation uses the variable capacity die EndPage:
3 ore, and the capacity is changed by the change of the applied voltage by the variable resistor. It
can also be made to change. Since this means is conventionally known, its detailed explanation
W14t-it abbreviates. Therefore, in the example shown in the figure, the wedge pivoting knob is
the case where the rotation resistor is configured, and this will be described below with reference
to FIG. This automatic insulator (2) is made of an insulating material gold and formed in a disk
shape, and a through hole (most) is formed at the center as shown in FIG. 8, which is rotatable
relative to the nine bosses υ It is fitted so as to rotate as the boss aυ 會 central axis.
Accordingly, the boss Q1) and the cylindrical shape in the through hole oI in this case are formed
in a cylindrical shape. Further, the protrusion side is provided on a part of the outer peripheral
page of the eyelid forceps ((), and the protrusion side is made K so as to be exposed to the
outside from the window hole (good) of the lower lower housing (3). The concave portion and the
concave portion are respectively formed on the surface of the automatic insulator (2) facing the
substrate (8) and the surface on the opposite side. An elastic body and a contact made of a metal
material are accommodated in the concave S @, an elastic body and a positioning ball (steel ball)
are accommodated in the concave portion @, ie, an elastic body and a positioning ball (a steel
ball) The contact point (the conductive layer-and the resistor layer-are formed on the locus of 41)
associated with the rotation of the contact axis), and the contact axis axis is common to both the
layer-and-by the elastic force of the elastic body. Electrically contacted. Therefore, these two
layers (goods) and-are respectively formed in a circular arc on the printed wiring board (2) on
concentric circles centering on the boss αυ. Of course, these two layers (formed in the same
manner as the 44-one printed wiring). An 11Ka sheet metal part #-opposite to the substrate (8)
of the automatic insulator (d) is dispensed, and its center hole is penetrated by the abovementioned boss revenge. And, on the locus of the rotation KfP concave S (most) of this sheet
metal member 0 automatic forceps (most), a large number of holding 5 (481 rotations formed
with a large number of positions are formed. Although it is made so that click morphs 3 times in
the same way, it is not necessary to use this method.
Therefore, by rotating the protrusion S @ of the automatic forceps (至) that is exposed to the
window hole of the lower housing (3) and the outside 11, the contact point − slides between the
two layers (goods) and 4 The resistance value can be changed, whereby it is possible to perform
so-called tuning by changing the capacity t of the variable capacity diode as well as adjusting the
sound volume and the sound quality as known in the prior art. Although the variable resistor
configuration has been described in this example, as shown in FIG. 1O, the ends of a plurality of
printed wiring are arranged side by side at equal angular intervals as shown in FIG. Thus, the
changeover switch can be configured. In addition, it is advantageous to dispose the forceps (2) in
this way as a bracelet, since the forceps (2) is placed in the inner ring of the automatic forceps
(2) t-annular casing (1) 0 as a bracelet. As is also apparent from FIG. 5, the outer peripheral
surface of the forceps (2) is carelessly rotated when used as a bracelet by choosing not to
protrude outward from the inner peripheral surface of the casing (11 You can prevent it from
moving. A storage battery S- of the maintenance battery is formed in a part of the lower housing
(3). FIG. 6 is an enlarged sectional view of a part of the battery, which is a mercury battery as an
example of the battery. Then, it is in contact with the printed wiring 6 that becomes the power
supply terminal formed on the -10,000 electrodes (50 printed wiring board (good)), and the
other electric (Sob) tiT body (3) KIIIL attachment When the elastic strip ω is made of a
conductive material, it is mechanically held by K and electrically connected to the circuit cleK
which constitutes the internal radio receiver. The 63 companies are the lids of the storage unit 4
of the battery ω, and it is possible to replace the battery by removing it. In the embodiment
shown in the drawings, a large number of window holes are provided on both side surfaces of the
upper housing (2). To explain this reason, when these window holes ω do not exist, the sound
waves generated on the back surface of the diaphragm a 間隙 form the gaps between the inner
and outer edges (17a) and (17b) and the substrate (8). Because the phase of the sound wave on
the back side of diaphragm a が is opposite to that of the front side, the sound waves generated
on the front side cancel each other and the efficiency drops, especially the wavelength It is
influenced by the sound KIN by the long mid and image area of However, as described above, by
providing window holes on both sides of the upper housing (2), the sound waves generated on
the back of the vibration temporary housing η are those window holes Since it is possible to
escape to the outside through the above, it is possible to avoid the turning in of the abovementioned diaphragm aη to the end page: 4 front side, and it is possible to prevent the
efficiency from being lowered.
In the embodiment shown in FIGS. 1 to 6, although the circuit as a receiver is attached to the
lower surface of the substrate (8), this circuit can be configured separately, and the receiver
circuit and It is obvious that the speaker rod can also be connected with a lead wire. FIG. 11
shows another embodiment of the electro-acoustic transducer according to the present invention.
The parts corresponding to those in FIGS. 1 to 6 are given the same reference numerals and the
explanation thereof is omitted. In the present example, a support is inserted between the inner
surface of each of the broken inner edge (17a) and the outer edge (17b) of the diaphragm and
the upper surface of the substrate (8). And (2ob)), and therefore these supports (20M) and (20b)
are respectively formed in a ring shape. Also, as the material of them, the same ones as those
described in FIG. 6 and nine can be used. 1 is a lead wire for voice coil members. FIG. 12 shows
still another embodiment, and in this embodiment, seven flanges are integrally provided on the
ends of the inner edge (17a) and the outer edge (17b) of the diaphragm and these are provided
This is the case where the support (2) for the diaphragm αα (this example is also shown as
(20a) and (20b)), respectively. In the embodiments shown in FIGS. 11 and 12, the magnets cJ]
and (2) can be configured endlessly or annularly, respectively. Also, in these embodiments, the
above-mentioned window holes are not particularly required. FIG. 13 shows still another
embodiment, and in FIG. 4 to FIG. 6, both side edges (171) and (17b) of diaphragm a.eta. Are
bent downward toward substrate (81 K). In the present example, the structure is the same as in
the present example, except that there are nine cases of bending in the opposite direction, so
detailed description thereof will be omitted. In this case, the diaphragm Q? Can be supported by
the support (2) k in the state shown in FIG. 7, and magnets (21) and (2) can also be of the same
construction. FIGS. 14 to 16 show further embodiments of the present invention, and FIGS. 15
and 16 are 0 examples showing enlarged cross-sectional views on XX and YY of FIG. 14
respectively. On the line annular substrate (8), electromagnetic driving means are provided at a
plurality of equiangular intervals at a plurality of positions so that the diaphragm all can be
driven by this K. As is well known, this electromagnetic drive means 6η is constructed by
winding a coil rod around a bar-shaped magnet @ and adhering a magnetic piece ... to the back
surface of the diaphragm a. Of course, the respective polarities of the respective electromagnetic
drive means groups are chosen to be identical to one another. In this case, as the elastic support
(2), as shown in FIG. 16, k, the relation between the front surface of the diaphragm and the
substrate (8), the same material as described in FIG. The arrangement positions can be selected
at respective intermediate positions of the respective electromagnetic drive means.
FIG. 17 shows still another embodiment. In this embodiment, the diaphragm (the inner edge (17
m) and the outer edge (17 b) of l 形成 are formed at the inner corner of the housing tl) and
directly to the nine steps-. In this case, the case is attached by adhesion or the like. Also in this
case, the magnets Qυ and (2) can each be annularly formed. FIGS. 18 to 20 show still another
embodiment, and FIGS. 19 and 20 are enlarged sectional views taken along the lines P--P and Q-Q of FIG. 18, respectively. In this embodiment, an electrostrictive element is interposed between
the substrate (8) and the diaphragm α に お い て at a plurality of locations (6 locations in the
illustrated example) on the substrate (8), and one end is a support substrate It is a case where it
attaches to (8) and a diaphragm (LnK connection is carried out by the connection body-at the
other end. Reference numerals (62a) and (62b) denote electrodes respectively deposited on both
sides of the electrostrictive element. Therefore, in this case, the electrostrictive element-also
serves as a support for the diaphragm (if) K. In this case, of course, the magnet series (2) shown
on the upper side is not required. Fig. 21 shows another embodiment of the supporting means of
the diaphragm afi, wherein the supporting body is manufactured as a thin plate made of a metal
material or a synthetic resin material, and this thin plate is folded in two to give elasticity. Attach
one plate portion to the substrate (8) K and attach it with an adhesive or the like, and further
bend the free end of the other plate portion upward to form a groove C20m>, this groove (20a)
On the other hand, in the same manner as in FIG. 6, the voice coil (11 is engaged with the coil
bobbin aI and adhered by an adhesive. The supports in this case can also be arranged at six
places with respect to the substrate (8) as shown in FIG. As a driving means of the diaphragm
Q.eta. In this case, an electromagnetic driver Ml @ shown in FIG. 15 can also be used in addition
to the case of using a voice coil aIIt using EndPage: 5 as shown in FIG. FIG. 22 is a cross-sectional
view showing an example of use of the electro-acoustic transducer according to the present
invention. That is, in the present embodiment, when this is used as the head 7 on, the cross
section has a square shape, and along the inner surface of the ear pad (bat) of nine flexible
structures, electricity according to the present invention An acoustic transducer is fitted. And, as
is clear from this figure, a so-called open head 7 is formed by forming a through hole at the
bottom of the pad, while the electro-acoustic transducer according to the present invention is
annular. It has the feature that the on can be obtained very easily. In addition, in the drawing, it is
a net for a sleeper provided so as to cover a through hole with v6 杜, and-is an ear.
In addition, as shown in FIG. 23, the electro-acoustic transducer according to the present
invention may be coaxially arranged with respect to the speaker box @, for example, with respect
to the low frequency speaker 4 and used as a medium or high sound speaker, for example. In this
case as well, since the speaker according to the present invention has a ring shape, there is an
effect such that there is almost no adverse effect on the sound generated from the low frequency
speaker [phase]. 0 indicates the supporting odor of the speaker αe. In each of the abovedescribed nineteen embodiments, the speaker according to the present invention (1e is an
annular ring and is a round gold, but it will be apparent that a quadrangle or other polygon can
be adopted. According to the invention described above, since the speaker has an annular shape
as a whole, it has characteristics that it can be easily used as an open type head 7 in addition to
being used as a bracelet. Further, the ratio of the drive portion to the area of the diaphragm αη
is sufficiently large compared to the case of the conventional cone type speaker, so that the
sound quality is improved, and in particular, the expansion of the high sound portion is
improved. Also, in the cases shown in FIG. 4 to FIG. 6, FIG. 11, and FIG. 15 to FIG. 16, there is no
need to provide a so-called edge portion on the diaphragm a.eta. Can have 4I conspiracy. When
the inner edge (17m) and the outer edge (17b) of the vibration plate aη of the speaker are bent
in the vibration direction of the vibration plate (1), the strength of the vibration plate αη can be
improved. Thus, the sound quality can be improved. In the embodiment shown in FIG. 7, the pair
of magnets (company) and (2) are both formed in an arc shape, but in this case, the magnets Q1)
and (i) are formed long. In this case, each of the magnets c11) and (d) is composed of a large
number of small pieces, and these are each formed on the locus of the arc, respectively. By
arranging them, as shown in FIG. 7, it is possible to form a magnet and also to make a coin. In
this case, there is a benefit that the productivity is improved because the absence of the magnet
is small compared to the case of making a long magnet.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of an electro-acoustic transducer
according to the present invention, FIG. 2 is a rear view thereof, FIG. 3 is an overhead view, and
FIGS. 4 to 6 are FIGS. Fig. 7 is an enlarged sectional view of A-person, B- and C-C in Fig. 2; Fig. 7
is a front view showing a state in which the upper body of Fig. 1 is removed and a part of the
diaphragm is cut away; FIG. 10 is a front view of a portion of a printed wiring board showing the
state of printed wiring, and FIGS. 11 to 13 are enlarged sectional views of a portion showing
another embodiment of the electro-acoustic transducer according to the present invention, The
figure shows a still further embodiment, with the casing removed and a front view with a part of
the diaphragm cut away, and FIGS. 15 and 16 are the x-X line and Y-Yli top view of FIG. 14,
respectively. FIG. 17 is a cross-sectional view showing still another embodiment, and FIG. 18 is a
view showing another embodiment with the exception of a frame and a state in which a part of
the diaphragm is cut out. 18, 19 and 20 are sectional views taken along the line P-P and Q-Qil of
FIG. 18, respectively, and FIG. 21 is a perspective view showing another embodiment of the
support means of the diaphragm, FIG. FIG. 2z is a cross-sectional view of a state in which the
electro-acoustic transducer according to the present invention is used as a head fo y and FIG. 23
is a front view B in a state of being attached to a speaker brace and used. 1 (1) is a radio receiver
housing, (2) and (3) are upper and lower housings respectively, (8) is a substrate, αυ is a
housing assembly support, EndPage: 6 mounting screws, a · A speaker, a は is its diaphragm, 舖 is
a coil bobbin, 舖 is a voice coil, (至 is a support of the diaphragm, 3]) and (2) a spreading magnet,
弼 is a printed wiring board, (2) Is printed wiring, (d) is an electric circuit part, surface is an FM
antenna, (d) is an M antenna, @ daughter rotation knob,-a resilient member, a company contact,-a
conductive layer,-is a resistor Layer, four-wire battery compartment, ■ is a battery. Agent 9 9 貞
隈 盛 盛 盛 第 4 End 5 EndPage: 7 第 6 6 8 8 14 EndPage: 8 17 17 21 MID / 1 EndPage: 9