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DESCRIPTION JPS63222600

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DESCRIPTION JPS63222600
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
electromechanical imaging transducer, and more particularly to an electromechanical vibration
transducer used as an imaging source for a somatoacoustic imaging device. (Conventional
technology), the sensational acoustic imaging device not only transmits the music sound to the
user by the speaker but also takes a low-pitched portion lower than the audible range and makes
it a mechanical image, which is low to the user. So-called realism is given by the overlap between
the vibration felt by the body and the auditory sense by giving the shooting movement of the
tone range. As these bodily sensation acoustic imaging devices, those shown in FIG. 1 and FIG. 2
are known. In the case shown in FIG. 1, the peripheral portions of the plate-like frame member 1
and the plate-like frame member 2 are integrally joined to form the case main body 5, and the
plate 4 is attached to the frame member 1 in the case main body 6. A bobbin 6 around which the
coil 5 is wound is fixedly fixed, and a yoke 9 provided with a magnet 8 supported displaceably by
the damper 7 is mounted in the frame member 2. The yoke 9 is composed of a bottom plate 11
having a pole piece 10 in the center and an annular top plate 12, and an annular magnet 8 is
disposed and fixed around the pole piece 10 on the bottom plate 11. Top Great 12 is stuck. The
damper 7 adheres and fixes the inner peripheral edge portion 71 to the magnet peripheral edge
portion 81 and adheres and fixes the outer peripheral edge g 72 of the damper 7 to the step 21
provided on the frame member 2. Then, when an electric signal is sent, the yoke 9 and the case
main body 3 supported by the case main body 5 via the damper are relatively changed by the
magnetic interference between the magnetic force generated in the coil 5 and the magnetic force
of the magnet 8 Vibration will occur. In FIG. 2, the inner peripheral edge 71 of the damper is
fixed to the peripheral edge 121 of the top plate 12 and the outer peripheral edge 72 is
adhesively fixed to the step 21 of the frame member 2 by another known technique. By the way,
in such a known electromechanical strain transducer, the damper 7 is positioned inward in the
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thickness direction of the yoke 9 so as to be outside the vibration range of the yoke 9 in the one
shown in FIG. It succeeded in thinning. However, this structure has a drawback that the radial
dimension can not be reduced. What is shown in FIG. 2 is da / buff? ! It is fixed within the surface
area of the top plate 120, that is, within the imaging range of the yoke 9, which can be
miniaturized in the radial direction. However, for the purpose of fixing the damper 7 on the
surface of the top grate 12, there has been a drawback that the operation of accurately
positioning the pole piece 1o of the yoke 9 constituting the magnetic circuit, the coil 5 and the
top plate 12 is not easy. .
In the case where the coil 5 and the magnet 8 and the yoke 9 are not accurately positioned, the
positional relationship between the coil and the magnetic circuit in the non-oscillating direction,
which relatively fluctuates in the photographing direction when energized, causes a deviation.
The influence is reduced and the efficiency of vibration is reduced. (Problems to be Solved by the
Invention) The present invention has been made based on the above circumstances, and the
object of the present invention is to accurately determine the positional relationship between the
coil 5, the yoke 90 pole piece 1o and the top plate 12 It is an object of the present invention to
provide an electromechanical vibration transducer which can be maintained and which is easy to
assemble, and hence can improve the excitation capability and reduce the manufacturing cost. In
order to solve the above problems, the present invention comprises a case, a wire supported by a
damper in the case, a magnet and a coil fixed to the case, and a coil, a yoke and a magnet In the
case where the magnetic circuit is configured and three-folded when energized, the case is
inwardly provided with a first frame member to which the coil is fixed, a second frame member
disposed to face the first frame member, and The damper is formed in a disk shape, and a disclike slit is formed in the outer peripheral portion in the circumferential direction, and the locking
portion is provided on the plate surface. The positioning of the yoke and the damper is
performed by the locking portion provided in the damper, and the positioning of the side frame
member with the damper and the first and second frame members is performed by the step
portion of the side frame member and the frame member The top plate of the yoke is carried out
by contact with each outer peripheral end And a damper which is attached to the top plate or the
bottom plate of the yoke and supports the yoke and the magnet, and the first and second frame
members and the side frame members. By integrally joining and fixing the step portions of the
side frame members, the positions of the members constituting the magnetic circuit can be
accurately set and maintained, and the assembling work can be facilitated. An embodiment of the
present invention will be described below with reference to the drawings. FIG. 3 is a plan view of
the '1 magnetic mechanical dynamic converter according to the present invention, and FIG. 4 is a
cross sectional view showing the magnet 8 and the yoke 9 adhered and fixed in this embodiment;
A case 3 is formed by the side frame member 2 and the magnet 8 and the yoke 9 are
displaceably supported by the damper 7 in the case 6, and one frame member 1 aK of the frame
member 1 is connected via the plate 4. The bobbin 6 around which the coil 5 is wound is fixed.
When the magnetic circuit is constituted by the yoke 9, the coil 5 and the magnet 8 and the
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power is supplied, the case 6 and the yoke 9 are displaced relative to each other to generate an
imaging motion.
Each component will be described in detail below. The side frame member 6 is annularly formed
of a hard synthetic resin material and has a notch step 21 facing inward at the upper and lower
end faces and is further cut out from this step 21 in the center direction Columnar stepped
portions 22 formed by protruding are provided at four inner circumferential surfaces. A through
hole 25 is provided in the columnar step 22 and a rivet described later is inserted. The damper 7
is a metal plate formed in a disk shape, and an arc-shaped slit 76 punched out in the
circumferential direction is formed to be transparent, and the outline of the slit 76 is in the
direction of the magnet 8 along the arc 77 in the center direction. A band-shaped locking piece
76 bent at a right angle is provided. Protrusions 74 extend in four places on the outer periphery
of the metal plate, and through holes 75 are bored in each of them so that the tip thereof
coincides with the step side wall 24 of the side frame member 2 It is cut off. The frame member
1 uses a damping plate, and in this damping plate, the upper and lower layers are skin steel
plates and the middle layer is a three-layered viscoelastic resin, and the vibration energy
generated in the frame member 1 is a viscoelastic resin The heat energy can be converted by the
deformation of H. Therefore, the noise generated in the frame member 1 can be eliminated. In
the frame member 1, a frame member 1 a on which a bobbin 6 obtained by winding a coil 5 is
fixed via a plate 4 is fixed, and a frame member 1 b is disposed on the surface facing the frame
member 1 a. In each of the frame members 1a and jb, holding recesses 14 are provided at four
peripheral edges, and the holding recesses 14 are provided with mounting holes 15
corresponding to the step through holes 23 and the through holes 75 of the damper. Is provided.
Thus, the locking pieces 73a 1731: + of the dampers 7a and 7b are positioned by abutting on the
outer peripheral side surfaces of the top plate 12 and the bottom plate 11, and are adhesively
fixed on the top plate 12 and the bottom plate 11 . The engaging recess 14 of the frame member
1 and the projecting piece 74 of the damper 7 are superposed on the columnar step 22, the
mounting hole 15 and the through hole 75 are aligned with the through hole 26, and the rivet 16
is inserted and crimped integrally fixed. doing. At this time, among the outer peripheral ends of
the frame member 1, the end of the engagement recess 14 is in contact with the wall 24 of the
step 22, and the other outer peripheral end is placed in the step 21 and is in contact with the
wall 25. ing. According to the electromechanical vibration converter configured as described
above, accurate positioning between the damper 7 and the top plate 12 and bottom plate 11 of
the yoke can be easily set by the locking piece 73 of the damper 7, and the damper 7 is the top
Since the inner periphery of the plate 12 or the bottom plate 11 is adhesively fixed on the plane
of the plate 12 or the bottom plate 11, the adhesive strength can be increased to enable a wide
range of fixation.
Then, since the outer peripheral ends of the frame member 1 and the damper 7 are in contact
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with the steps 24. 25 of the side frame member 2 having the same diameter, the position of the
coil 5 in the gap between the yoke 90 pole piece 10 and the top plate 12 Since the frame
member 1 and the damper 7 are superposed at the step 21.22 of the side frame member 2 and
integrally joined and fixed, the assembly operation is also extremely easy. The manufacturing
cost can be reduced. In particular, when the holes 15.75.23 of each of the frame member 1, the
damper 7, and the side frame member 2 are made to coincide with each other and the rivet 16 is
inserted and fixed as in this embodiment, this electromechanical vibration converter is extremely
effective. It is possible to maintain a good excitation ability for a long time without any
displacement of the position of the coil 5 and a strong one. [Effects of the Invention] As described
above, according to the present invention, the damper is provided with the locking piece and
attached to the yoke, and the frame member which is a component of the case is engaged with
the damper at the inner peripheral step of the side frame member. Since the position of the coil is
accurately and firmly maintained since the contact and fixation are made, it is possible to
improve the excitation capability and reduce the manufacturing cost due to the ease of
manufacture.
[0002]
Brief description of the drawings
[0003]
1 and 2 are cross-sectional views of a conventional electromechanical vibration transducer, and
FIG. 3 is a plan view showing a part of the electromechanical vibration transducer according to
the present invention cut away. Is a cross-sectional view of FIG. 3 cut in the X-1 direction.
FIG. 5 is a perspective view of the step 21.22. Reference Signs List 1 Frame member Material 2
side frame member 3 Case 5 Coil 6 и ? и bobbin 7 и Dan 8 и Magnet 9 и и и? Yellow 10 ? 1 pole
piece 11 ? ? ? Bottom plate 12 ? ? ? Top plate 73 ? ? ? Locking piece 74 иии Projection
piece 21.22 и и и Step part * 2 Area procedure correction document (method ) Display of the case
on April 3, 1955 Patent application No. 572?O No. 2 in the case of Showa 6z, name of the
invention electromechanical vibration converter 4 Relationship with the person making
correction Patent applicant address 61 Sakuragaokacho, Shibuya-ku, Tokyo No. 15 5, Target
statement of correction (It-4,
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