JP2012134640A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact and thin speaker having excellent input tolerance and bass playback capability, without increasing component costs and manufacturing costs.SOLUTION: A speaker 1 includes: a diaphragm 2 of a thin and long formation; a thin, long and annular edge 3 disposed in a manner to surround the periphery of the diaphragm 2; a voice coil bobbin 4 for vibrating the diaphragm 2; a voice coil 5 wound along the outer peripheral surface of the voice coil bobbin 4; a frame 6; a magnetic circuit 7 joined to the frame 6 more backward than the diaphragm 2; and a connection member 8 for joining to the rear face of the diaphragm 2. The connection member 8 is composed of a plurality of members including a diaphragm joint portion 21, a bobbin connection portion 22, a center retention portion 23 and a frame body portion 24. Therefore, when the shape of the diaphragm 2 is varied, only the shape of the diaphragm joint portion 21 is sufficiently varied accompanying thereto, and the other members can be commonized.

Description

  The present invention relates to a speaker.

  Speakers are widely used not only in home audio equipment and in-vehicle audio equipment, but also in personal computers, mobile phones, game machines, and various electronic devices. Electronic devices are becoming lighter, thinner, and smaller, and speakers are also required to be smaller, thinner, and higher performance. For higher performance, in addition to excellent sound quality, high input resistance is required.

  The electronic device is required to have a high input resistance despite being an elongated shape because the installation space of the speaker is limited. An elongated speaker has a short diameter dimension, and therefore cannot have a large voice coil diameter, which is disadvantageous for input resistance. If the voice coil diameter is increased without changing the short diameter dimension of the speaker, the edge width is reduced accordingly, the amplitude of the diaphragm is limited, and as a result, the input resistance cannot be increased. Further, when the edge width is narrowed, the minimum resonance frequency is also increased, and the reproduction capability in the low band is deteriorated.

  FIG. 16 is a cross-sectional view of a conventional elongated speaker 121, with the cross-sectional structure of the short diameter side of the speaker 121 shown on the left side and the cross-sectional structure of the long diameter side shown on the right side. 16 includes a frame 122, a voice coil 124 supported in a magnetic gap of a magnetic circuit 123 coupled to the frame 122, and a voice coil 124 whose outer peripheral portion is fixed to the frame 122 via an edge 125. In addition, a vibration plate 126 that vibrates in the vertical direction, a damper 127 whose inner peripheral portion is fixed to the voice coil 124 and whose outer peripheral portion is fixed to the frame 122, and a center cap 128 that covers the front of the voice coil 124 are provided.

  In the speaker 121 of FIG. 16, when the diameter of the voice coil 124 is increased in order to achieve high input resistance, the width of the edge 125 on the short diameter side becomes narrower, the minimum resonance frequency is increased, and the reproduction capability in the low range is increased. It will deteriorate. There exists patent document 1 as an example which solves such a problem.

  FIG. 17 is a diagram showing the structure of the elongated speaker 231 described in Patent Document 1. In FIG. 17A is a cross-sectional view of the speaker 231, and FIG. 17B is a perspective view of the main part of the speaker 231. In FIG. 17A, the cross-sectional structure on the short diameter side of the speaker 231 is shown on the left side, and the cross-sectional structure on the long diameter side is shown on the right side, as in FIG.

  The voice coil 232 of the speaker 231 in FIG. 17 is arranged on the short diameter side on the outer side of the inner periphery of the edge 233 so that the edge 233 and the voice coil 232 are not in contact with each other at the upper end portion of the voice coil 232. The part 235 is cut away. Therefore, the diameter of the voice coil 232 can be increased without reducing the width of the edge 233 on the short diameter side, and high input resistance can be ensured.

  Another example of solving the above problem is Patent Document 2. FIG. 18 is a cross-sectional view of the speaker 341 described in Patent Document 2. The speaker 341 shown in FIG. 18 has a diameter of the voice coil bobbin 343 larger than the diameter of the central dome 342 of the diaphragm, and an expansion member 344 is disposed between the voice coil bobbin 343 and the central dome 342 of the diaphragm. The inner peripheral portion of the outer peripheral dome 345 of the diaphragm is joined to the member 344.

  The speaker 341 of FIG. 18 is provided with the expansion member 344, so that even if the diameter of the voice coil bobbin 343 is increased, it is not necessary to reduce the width of the outer peripheral dome 345 of the diaphragm, and input resistance can be increased.

Japanese Patent No. 3956485 JP 2006-31156 A

  However, in the above-mentioned Patent Document 1, a processing process for cutting out the upper end portion of the voice coil 232 is necessary, and the workability is deteriorated because the voice coil 232 has directionality when the speaker 231 is assembled. These can cause an increase in component costs and manufacturing costs.

  Further, in Patent Document 2, since the shape of the expansion member 344 is a substantially elongated voice coil shape and a flat ring shape, it cannot be applied to an elongated speaker using a normal round voice coil. There's a problem. Further, Patent Document 2 is a micro speaker without a damper and has a problem that the low-frequency reproduction capability is inferior.

  The present invention has been made in order to solve the above-described problems, and its purpose is to reduce the size and thickness of the device with excellent input resistance and bass reproduction capability without increasing the component cost and manufacturing cost. Is to provide a simple speaker.

In order to solve the above problems, in one embodiment of the present invention, a diaphragm;
A frame arranged from the outer peripheral side of the diaphragm to the rear;
An inner edge is bonded to the diaphragm, and an outer edge is bonded to the frame;
A magnetic circuit disposed behind the diaphragm and joined to the frame;
A voice coil bobbin that vibrates the diaphragm;
A voice coil wound around an outer peripheral surface of the voice coil bobbin and supported in a magnetic gap of the magnetic circuit,
A bonding member bonded to the back surface of the diaphragm and bonded to the voice coil bobbin, the frame, and the magnetic circuit;
The coupling member is
A diaphragm joint bonded to the back surface of the diaphragm;
A bobbin coupling portion in which the diaphragm joint portion is joined to the front side and the voice coil bobbin is joined to the bottom side;
A center holding part for positioning the center position of the bobbin coupling part;
There is provided a speaker characterized by having a frame body portion joined to the center holding portion and joined to the frame and the magnetic circuit.

  According to the present invention, it is possible to provide a speaker that is excellent in input resistance and bass reproduction capability and can be reduced in size and thickness without increasing the component cost or manufacturing cost.

1 is an exploded perspective view of a speaker 1 according to an embodiment of the present invention. FIG. The top view which looked at the speaker 1 through the voice coil bobbin from the front. AA line sectional view of Drawing 3. (A) is the top view which looked at the diaphragm 2 from the front, (b) is the BB sectional drawing of Fig.5 (a). An example of the diaphragm 20a without a recess is shown, wherein (a) is a plan view of the diaphragm 20a, (b) is a cross-sectional view taken along the line bb in the longitudinal direction of the diaphragm 20a, and (c) is a short view of the diaphragm 20a. FIG. The short-diameter direction sectional view of speaker 1 provided with diaphragm 20a of concave shape where the front side is gentle. FIG. 3 is an exploded perspective view of a coupling member 8 used for the speaker 1. Sectional drawing of the speaker 1 in case the back surface shape of the diaphragm 2 is planar shape. FIG. 3 is an exploded perspective view of a coupling member 8 used for the speaker 1. The partial expanded bird's-eye view of the diaphragm junction part 21 which has the collar part 21a. It is a figure which shows the 1st modification of the center holding | maintenance part 23, (a) is a top view, (b) is a perspective view. It is a figure which shows the 2nd modification of the center holding | maintenance part 23, (a) is a top view, (b) is a perspective view. The exploded perspective view of the speaker 1 provided with the coupling member 8 which has the vibration transmission part 25 which integrated the diaphragm junction part 21 and the bobbin coupling part 22. FIG. The disassembled perspective view which shows the modification of the speaker 1 of FIG. Sectional drawing of the conventional elongate speaker 121. FIG. FIG. 9 shows a structure of an elongated speaker 231 described in Patent Document 1. Sectional drawing of the speaker 341 described in patent document 2. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of a speaker 1 according to an embodiment of the present invention. A speaker 1 in FIG. 1 includes an elongated diaphragm 2, an elongated annular edge 3 disposed so as to surround the diaphragm 2, a voice coil bobbin 4 that vibrates the diaphragm 2, and a voice coil bobbin 4. A voice coil 5 wound along the outer peripheral surface, a frame 6, a magnetic circuit 7 joined to the frame 6 on the rear side of the diaphragm 2, and a coupling member 8 joined to the back surface of the diaphragm 2. It has.
The inner peripheral part of the edge 3 is joined to the diaphragm 2, and the outer peripheral part of the edge 3 is joined to the frame 6. The voice coil 5 wound along the outer peripheral surface of the voice coil bobbin 4 is supported in the magnetic gap of the magnetic circuit 7.

  When the voice coil bobbin 4 and the diaphragm 2 and the coupling member 8 are joined, for example, an adhesive member may be attached to at least one of the voice coil bobbin 4, the diaphragm 2 and the coupling member 8 to join them. In addition, a specific joining form is not ask | required.

  The magnetic circuit 7 in FIG. 1 includes a pot yoke 11 joined to the inner periphery of the frame 6, a magnet 12 disposed inside the pot yoke 11, and a pole piece 13 disposed on the front surface of the magnet 12. . The magnetic circuit 7 is an inner magnet type, but an outer magnet type magnetic circuit 7 may be used.

  One of the technical features of this embodiment is the structure of the coupling member 8. FIG. 2 is an exploded perspective view of the coupling member 8. The coupling member 8 in FIG. 2 includes a diaphragm joint portion 21, a bobbin coupling portion 22, a center holding portion 23, and a frame body portion 24. The diaphragm joining portion 21 is joined to the back surface of the diaphragm 2. The diaphragm joint 21 is joined to the front side of the bobbin joint 22, and the voice coil bobbin 4 is joined to the bottom side of the bobbin joint 22. The center holding part 23 positions the center position of the bobbin coupling part 22, that is, the center position of the voice coil bobbin 4. The frame body part 24 is joined to the center holding part 23 and to the frame 6 and the magnetic circuit 7.

  FIG. 3 is a plan view of the speaker 1 viewed from the front through the voice coil bobbin, and FIG. 4 is a cross-sectional view taken along line AA of FIG. 5A is a plan view of the diaphragm 2 viewed from the front, and FIG. 5B is a cross-sectional view taken along the line BB in FIG. 5A.

  As shown in FIG. 1, since the voice coil bobbin 4 is attached to the back side of the diaphragm 2, the position of the voice coil bobbin 4 is shown by a broken line in FIG. As shown in FIG. 5, the diaphragm 2 is formed with three concave portions 2 a along the longitudinal direction thereof. Further, a rib 2c extending rearward is formed on the outer peripheral edge portion of the diaphragm 2. A diaphragm joint 21 is joined to the side surface of two adjacent recesses 2a of the diaphragm 2 and the inner peripheral surface of the rib 2c between these recesses 2a.

  As shown in the cross-sectional view of FIG. 4, the front surface side of the diaphragm joint portion 21 has a gently curved shape in accordance with the back surface shape of the diaphragm 2, and the contact area with the back surface side of the diaphragm 2 is widened. ing. Further, a protrusion 21 a is provided at the center of the back surface side of the diaphragm joint 21, and the protrusion 21 a is fitted into a hole provided at the center of the bobbin coupling portion 22. Thereby, the diaphragm joining part 21 and the bobbin coupling part 22 are positioned with respect to each other.

  The inner diameter of the back surface side of the bobbin coupling portion 22 is substantially equal to the outer diameter of the voice coil bobbin 4, and the front end portion of the voice coil bobbin 4 is joined to the rear surface side of the bobbin coupling portion 22. As described above, since the center position of the voice coil bobbin 4 is positioned by the center holding part 23, the voice coil bobbin 4 and the bobbin coupling part 22 are correctly connected by joining the voice coil bobbin 4 to the back side of the bobbin coupling part 22. Can be positioned. The bobbin coupling portion 22 is positioned at the center position of the coupling member 8 by the center holding portion 23. Therefore, the voice coil bobbin 4 can be positioned at the center position of the coupling member 8 by inserting the voice coil bobbin 4 into the bobbin coupling portion 22.

  As shown in FIG. 4, the center holding portion 23 is joined to the frame body portion 24, and the frame body portion 24 is joined to the pot yoke 11 and the frame 6 of the magnetic circuit 7. Thereby, the coupling member 8 is firmly joined to the frame 6 and the magnetic circuit 7.

  The material of the coupling member 8 is not particularly limited, but among the members constituting the coupling member 8, the diaphragm joint portion 21 and the bobbin coupling portion 22 are formed using a material having a higher Young's modulus than the center holding portion 23. . This is because the diaphragm joint portion 21 and the bobbin joint portion 22 play a role of transmitting the vibration of the voice coil 5 to the diaphragm 2, so that the harder the material of the diaphragm joint portion 21 and the bobbin joint portion 22, the voice coil This is because the vibration 5 can be transmitted to the diaphragm 2 without loss. On the other hand, since the center holding part 23 functions as a damper, it is preferable to use a resilient material to lower the minimum resonance frequency and to enhance the low frequency reproduction capability.

  The concave portion 2a and the rib 2c of the diaphragm 2 are constituted by a single member formed integrally. For example, paper or resin is used as the material of this member, but the material is not particularly limited.

  As shown in FIG. 4, the diaphragm 2 has a gently curved shape in the short direction, and the center line in the short direction protrudes forward most.

  An edge 3 is joined to the outer peripheral side of the front surface of the diaphragm 2. The inner peripheral portion 3 a of the edge 3 is joined to the diaphragm 2 inside the outer peripheral edge portion of the diaphragm 2. Further, as shown in FIG. 3, the voice coil bobbin 4 joined to the diaphragm joining portion 21 is larger than the inner diameter of the edge 3. Further, the outer peripheral edge of the voice coil bobbin 4 is not in contact with the edge 3.

  Therefore, according to the present embodiment, the outer diameter of the voice coil bobbin 4 can be increased. That is, in the case of the present embodiment, in order to increase the outer diameter of the voice coil bobbin 4, it is necessary to increase the outer diameter of the bobbin coupling portion 22 accordingly, but the outer diameter of the bobbin coupling portion 22 increases. However, there is no interference with the edge 3, and there is no possibility that the width of the edge 3 will be narrowed due to the increase in the outer diameter of the bobbin coupling portion 22. Therefore, the conventional problem that the width of the edge 3 is narrowed and the minimum resonance frequency is increased due to the increase in the diameter of the voice coil bobbin 4 does not occur.

  Thus, according to this embodiment, even if the outer diameter of the voice coil bobbin 4 is increased, the width of the edge 3 is not affected. Therefore, it is possible to easily cope with an increase in the diameter of the voice coil bobbin 4. As the diameter of the voice coil bobbin 4 is larger, the input withstand voltage is higher, so that it is possible to increase the output even though the speaker 1 is small and thin.

  As described above, according to the present embodiment, the diameter of the voice coil bobbin 4 can be made larger than the short diameter of the diaphragm 2, but the diameter of the voice coil bobbin 4 is always larger than the short diameter of the diaphragm 2. Doesn't have to be big. The present embodiment can be applied to the speaker 1 having a voice coil bobbin 4 having a diameter smaller than the short diameter of the diaphragm 2 without any problem.

  In FIGS. 1 to 5, an example in which three concave portions 2 a are formed in the diaphragm 2 and two coupling members 8 are fixed by these three concave portions 2 a has been described. However, when only one voice coil bobbin 4 is used, vibration is generated. The plate 2 may be provided with two recesses 2a. That is, at least two recesses 2a are formed in the diaphragm 2 of the present embodiment. It is necessary to set the interval between two adjacent recesses 2 a in accordance with the outer diameter of the diaphragm joint 21.

  The present embodiment can also be applied when the number of voice coil bobbins 4 is three or more. In this case, the number of recesses 2 a corresponding to the number of voice coil bobbins 4 may be formed in the diaphragm 2. Further, it is necessary to provide a coupling member 8 for each voice coil bobbin 4.

  In the above-described embodiment, the example in which the diaphragm 2 having the three recesses 2a is used has been described. However, the recesses are not necessarily required in the diaphragm 2.

  For example, FIG. 6 shows an example of a diaphragm 20a having no recess, FIG. 6 (a) is a plan view of the diaphragm 20a, FIG. 6 (b) is a cross-sectional view taken along line bb in the longitudinal direction of the diaphragm 20a, and FIG. 6 (c) is a cross-sectional view of the diaphragm 20a in the short direction cc line.

  The front surface of the diaphragm 20a of FIG. 6 has a gentle convex shape, and there is no concave portion. The rear surface side of the diaphragm 20a is also convex when viewed from the front, and this is the same as the diaphragm 2 in FIG. Therefore, if the convex shape of the back surface side of the diaphragm 2 in FIG. 3 and the diaphragm 2 in FIG. 6 are exactly the same, the diaphragm joint portion 21 in FIG. 2 can be applied as it is.

  The shape on the front side of the diaphragm 2 may be a shape other than the convex shape, for example, a concave shape. FIG. 7 is a cross-sectional view in the short-diameter direction of the speaker 1 provided with the concave-shaped diaphragm 20a whose front side is gentle, and FIG. 8 is an exploded perspective view of the coupling member 8 used in the speaker 1.

  The coupling member 8 in FIG. 8 includes the diaphragm joint portion 21, the bobbin joint portion 22, the center holding portion 23, and the frame body portion 24, like the joint member 8 in FIG. The shape of the front side of 21 is different from the diaphragm joint 21 of FIG. The rear surface side of the diaphragm 20a in FIG. 7 has a concave shape when viewed from the front, and the curved surface shape is opposite to that of the diaphragm 2 in FIG. The front surface side of the diaphragm joint portion 21 of FIG. 8 has a shape that matches the curved surface shape of the rear surface side of the diaphragm 20a, and this shape is opposite to the curved surface shape of the diaphragm joint portion 21 of FIG. .

  On the other hand, the shape of the bottom surface side of the diaphragm joint portion 21 in FIG. 8 is the same as that of the diaphragm joint portion 21 in FIG. 2, and the bobbin coupling portion 22 and the center holding portion disposed on the rear side from the diaphragm joint portion 21. 23 and the frame part 24 can all be made common with the thing of FIG.

  As described above, even if the shapes of the diaphragms 2 and 20a change, as long as the front surface side of the diaphragm joint portion 21 in the coupling member 8 is made to have a shape that matches the rear surface shape of the diaphragms 2 and 20a, Since all the members can be made common, the diaphragm 2 of various sizes and shapes can be handled without much cost.

  The shapes of the diaphragms 2 and 20a are not limited to those described above, and can take various shapes. For example, FIG. 9 is a cross-sectional view of the speaker 1 when the rear surface shape of the diaphragm 20b is a planar shape, and FIG. 10 is an exploded perspective view of the coupling member 8 used in the speaker 1. Also in this case, although the shape of the front surface side of the diaphragm joint portion 21 needs to be flat, the bottom surface side of the diaphragm joint portion 21 may be the same as the diaphragm joint portion 21 of FIG. The bobbin coupling part 22, the center holding part 23, and the frame part 24 arranged on the rear side of the joint part 21 can all be shared.

  As described above, the diaphragms 2, 20 a and 20 b can be formed in various shapes according to the performance of the speaker 1. In general, the concave or flat diaphragms 20a and 20b as shown in FIGS. 7 and 9 are desirable when the low range is emphasized, and the convex diaphragm 2 as shown in FIG. 4 is desirable when the middle and high range is emphasized.

  The above-described diaphragm joint portion 21 is joined to the rear surface side of the diaphragms 2, 20 a, and 20 b, but a flange portion 21 a may be provided on the front surface side of the diaphragm joint portion 21. FIG. 11 is a partially enlarged bird's-eye view of the diaphragm joint portion 21 having the flange portion 21a. By providing the flange portion 21a, the contact area with the diaphragms 2, 20a, and 20b can be increased, and the joining force between the diaphragm joining portion 21 and the diaphragms 2, 20a, and 20b can be increased. The flange portion 21a does not need to be provided in both the major axis direction and the minor axis direction of the diaphragm 2, and may be provided in only one of them.

  In the embodiment described above, the voice coil bobbin 4 and the voice coil 5 have a circular shape, but may have a rectangular shape with rounded corners, or a track shape (a shape in which arcs are connected to both ends of two parallel straight lines, respectively) ) Or any other shape, and the specific shape is not limited.

  The shape of the center holding part 23 is not necessarily limited to that shown in FIG. For example, FIG. 12 is a view showing a first modification of the center holding portion 23, FIG. 12 (a) is a plan view, and FIG. 12 (b) is a perspective view.

  In the center holding portion 23 shown in FIG. 2, the widths of the four leg portions 23a extending from the bobbin coupling portion 22 to the frame body portion 24 are substantially equal. However, the center holding portion 23 in FIG. The width of is not constant. The minimum resonance frequency can be adjusted by changing the width of the four leg portions 23a depending on the location. More specifically, the lowest resonance frequency can be made lower. Therefore, the center holding part 23 of FIG. 12 is a desirable shape for improving the reproduction capability in the low sound range.

  In order to simply lower the lowest resonance frequency, for example, the widths of the four leg portions 23a may be narrowed uniformly. However, if the width is simply narrowed, the strength of the center holding portion 23 becomes weak, and a high output is obtained. I can't put it out. Accordingly, the center holding portion 23 in FIG. 12 is configured to partially adjust the widths of the four leg portions 23a so that the high output can be maintained while lowering the lowest resonance frequency. In view of such a purpose, the shape of the center holding part 23 is not necessarily limited to that shown in FIG. The shape of the four leg portions 23a may be adjusted in consideration of the material and thickness of the center holding portion 23, the length and width of the four leg portions 23a, and the like.

  On the other hand, FIG. 13 is a figure which shows the 2nd modification of the center holding | maintenance part 23, Fig.13 (a) is a top view, FIG.13 (b) is a perspective view. 13 has a flat plate portion 23b for placing the bobbin coupling portion 22 in the center, and four leg portions 23c extending outward from the flat plate portion 23b and joined to the frame body portion 24. . The leg portion 23c of FIG. 13 is shorter than the leg portion 23a of FIG. 12, and the flat plate portion 23b firmly fixes the bobbin coupling portion 22. Therefore, the center holding portion 23 in FIG. 13 has a desirable shape when it is desired to increase the minimum resonance frequency. By adopting this center holding portion 23, it is possible to improve the reproduction capability in the middle and high range.

  In FIGS. 12 and 13 described above, the example in which the sound range is adjusted by changing the shape of the center holding portion 23 has been described. However, instead of such a change in shape or along with the change in shape, the center holding is performed. The sound range may be adjusted by variously changing the material of the portion 23.

  Thus, in this embodiment, the coupling member 8 joined to the back surface of the diaphragm 2 is composed of a plurality of members including the diaphragm joining portion 21, the bobbin coupling portion 22, the center holding portion 23, and the frame body portion 24. For this reason, when the shape of the diaphragm 2 changes, only the shape of the diaphragm joint portion 21 needs to be changed accordingly, and other members can be used in common. This makes it easy to reduce parts costs.

  Further, by configuring the coupling member 8 with a plurality of members, for example, when it is desired to adjust the minimum resonance frequency, only the shape of some members (for example, the center holding portion 23) needs to be changed, and the design can be easily changed. Therefore, the cost associated with the design change can be reduced.

  Further, since the coupling member 8 is joined to the back surface of the diaphragm 2 without depending on the diameter of the diaphragm 2 in the minor axis direction, the voice coil bobbin 4 having a larger diameter than the diameter of the diaphragm 2 in the minor axis direction is coupled. It can be attached to the member 8 and high input resistance can be achieved. Further, since the width of the edge 3 joined to the diaphragm 2 is not limited, the edge 3 does not have to be narrowed more than necessary, the lowest resonance frequency can be kept low, and the reproduction capability in the low sound range can be improved.

  Further, each member constituting the coupling member 8 can be miniaturized, and after assembling each member to produce the coupling member 8, bonding to the diaphragm 2 is performed, so that the assembly process of the speaker 1 can be simplified. Thus, a small and thin speaker 1 having excellent acoustic characteristics can be realized.

  Furthermore, since a plurality of coupling members 8 of the present embodiment can be arranged in a row, the speaker 1 in which a plurality of woofers or tweeters are arranged side by side can be easily obtained using the elongated diaphragm 2. Can be made.

  In FIG. 1 and the like, the example in which the coupling member 8 is configured by a plurality of members including the diaphragm joint portion 21, the bobbin coupling portion 22, the center holding portion 23, and the frame body portion 24 is shown. May be integrated. For example, FIG. 14 is an exploded perspective view of the speaker 1a including the coupling member 8 having the vibration transmitting unit 25 in which the diaphragm joint 21 and the bobbin coupling 22 are integrated.

  The center of the vibration transmitting portion 25 of FIG. 14 is a cavity, and the voice coil bobbin 4 inserted from the bottom surface side is supported in a state of being in contact with the frame on the front surface side. Further, the center holding portion 23 has a circular frame that matches the outer diameter of the voice coil bobbin 4 so that the voice coil bobbin 4 can be inserted.

  The coupling member 8 of FIG. 14 has the same structure as the coupling member 8 of FIG. 2 except that a vibration transmission unit 25 is newly provided and the center of the center holding unit 23 is hollow. Further, the components of the speaker 1a other than the coupling member 8 of FIG. 14 are the same as those of the speaker 1 of FIG.

  FIG. 15 is an exploded perspective view of a speaker 1b showing a modification of the speaker 1a of FIG. When the plurality of coupling members 8 are arranged in a row in the longitudinal direction, the members constituting the coupling member 8 may be simply arranged side by side as shown in FIG. Some members may be integrated with adjacent members. For example, the speaker 1b of FIG. 15 shows an example having a structure 26 in which adjacent center holding portions 23 are integrally formed and a structure 27 in which adjacent frame portions 24 are integrally formed.

As shown in FIG. 15, by integrating a part of the coupling member 8 with another coupling member 8, the labor of assembling the individual coupling members 8 can be reduced, and the assembly workability is improved. .
In addition, the kind of member integrated by several coupling members 8 is not limited to what was shown in FIG. For example, the vibration transmission unit 25 may be integrated.

  The aspect of the present invention is not limited to the individual embodiments described above, and includes various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the contents described above. That is, various additions, modifications, and partial deletions can be made without departing from the concept and spirit of the present invention derived from the contents defined in the claims and equivalents thereof.

1, 1a, 1b Speaker 2, 20a, 20b Diaphragm 2a Recess 2c Rib 3 Edge 3a Inner circumference 4 Voice coil bobbin 5 Voice coil 6 Frame 7 Magnetic circuit 8 Coupling member 11 Pot yoke 12 Magnet 13 Pole piece 21 Diaphragm junction 21a ridge part 22 bobbin coupling part 23 center holding part 23a, 23c leg part 23b flat plate part 24 frame part

Claims (11)

A diaphragm,
A frame arranged from the outer peripheral side of the diaphragm to the rear;
An inner edge is bonded to the diaphragm, and an outer edge is bonded to the frame;
A magnetic circuit disposed behind the diaphragm and joined to the frame;
A voice coil bobbin that vibrates the diaphragm;
A voice coil wound around an outer peripheral surface of the voice coil bobbin and supported in a magnetic gap of the magnetic circuit,
A bonding member bonded to the back surface of the diaphragm and bonded to the voice coil bobbin, the frame, and the magnetic circuit;
The coupling member is
A diaphragm joint bonded to the back surface of the diaphragm;
A bobbin coupling portion in which the diaphragm joint portion is joined to the front side and the voice coil bobbin is joined to the bottom side;
A center holding part for positioning the center position of the bobbin coupling part;
A speaker having a frame part joined to the center holding part and joined to the frame and the magnetic circuit.   The speaker according to claim 1, wherein an outer diameter of the voice coil bobbin is larger than an outer diameter of the diaphragm in a short direction. The center holding portion has a plurality of legs that extend outward from the bobbin coupling portion disposed in the center and are joined to the frame body portion,
The speaker according to claim 1 or 2, wherein a minimum resonance frequency of the diaphragm is adjusted by adjusting a width of each of the plurality of leg portions. The center holding part is
A flat plate portion on which the bobbin coupling portion is placed in the center;
The speaker according to claim 1, further comprising a plurality of legs that extend outward from opposite ends of the flat plate portion and are joined to the frame body portion. A vibration transmission unit integrally forming the diaphragm joint and the bobbin coupling part;
The speaker according to any one of claims 1 to 4, wherein the center holding portion positions a center position of the vibration transmitting portion. A plurality of the coupling members are arranged in a row on the rear surface of the diaphragm,
The at least one of a plurality of diaphragm joint portions, a plurality of bobbin joint portions, a plurality of center holding portions, and a plurality of frame portions in the plurality of coupling members is integrally formed. 6. The speaker according to any one of 5 to 5.   The speaker according to claim 1, wherein the diaphragm coupling portion and the bobbin coupling portion are formed using a material having a Young's modulus larger than that of the center holding portion. The diaphragm is
At least two recesses that are disposed at a distance approximately equal to the diameter of the voice coil and are formed on the back side of the diaphragm;
The speaker according to claim 1, further comprising: a rib formed on a back surface side along an outer peripheral edge portion of the diaphragm. The diaphragm has an elongated shape,
The diaphragm joint portion is joined to the side surface portions of the two recesses along the longitudinal direction of the diaphragm, and is joined to the inner peripheral surface of the rib along the lateral direction of the diaphragm. The speaker according to claim 8.   The speaker according to claim 1, wherein the voice coil bobbin has a circular shape.   The speaker according to claim 1, wherein the voice coil bobbin has a rectangular shape or a track shape with rounded corners.

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