Vehicle speaker

Abstract

Provided is a vehicular speaker that is capable of achieving acoustic output of constant characteristics irrespective of the dimension or configuration of overall interior materials in use, and that can be constructed with a smaller number of components and assembling steps.　The vehicular speaker according to the present invention has a plate-like vibration member 1. A vibrating surface portion 10 is formed in a part of the vibration member 1. A non-vibrating surface portion 11 is formed in a part of the vibration member 1. The vibrating surface portion 10 and the non-vibrating surface portion 11 are partitioned into separate compartments by a partition part 12. A voice coil 3 is fixed to the vibrating surface portion 10. A holding member 8 is fixed to the non-vibrating surface portion 11. A magnetic circuit 2 is fixed to the holding member 8 in such a manner as to correspond to the voice coil 3.

Description

Technical Field

[0001] The present invention relates to a vehicle speaker, and more particularly to a vehicle speaker using a resin molded member used for interior and exterior decoration of a vehicle as a vibrating member.

Background Art

[0002] Conventionally, a speaker device that reproduces sound by vibrating a conical diaphragm has been widely used for acoustic reproduction of music and voice in a vehicle interior, for example, in an automobile. This speaker device is disposed, for example, embedded in the door for the front seats on the left and right.

[0003] In recent years, in order to create a high-quality acoustic space in the vehicle interior, a plurality of speakers may be installed not only in the doors for the front seats but also in limited spaces of the vehicle such as in the doors for the rear seats, in the back doors, in the dashboard, and in the ceiling. Therefore, vehicle speakers are required to have a high degree of freedom in installation position and space saving. However, a speaker having a diaphragm requires a certain installation space, and in order to maintain high-quality sound, the size of the speaker itself must be increased, making it difficult to achieve a high degree of freedom in installation position and space saving.

[0004] Therefore, as shown in Patent Documents 1 to 4, for example, an exciter has been proposed that vibrates an interior material that comes into contact by vibrating itself and generates sound from the interior material. According to the exciter, acoustic reproduction is possible without using a conical diaphragm, and a high degree of freedom in installation position and space saving are possible.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

[0006] However, with the prior art as described above, it has been difficult to reproduce an acoustic signal with the same sound quality as a speaker. For example, when an exciter is attached to an interior material that covers a pillar or the like, which is a window pillar of an automobile, the entire interior material vibrates, so the sound quality changes depending on the shape, dimensions, wall thickness, etc. of the interior material. In particular, vehicle speakers are assumed to be installed in various types and sizes of vehicles. However, if the type and size of the vehicle are different, even if the same parts are used, their shapes, dimensions, wall thickness, etc. are different. Therefore, even if the same exciter is attached to the same interior material, it is impossible to reproduce the same characteristic sound.

[0007] In addition, the prior art has the disadvantages that the number of components constituting the exciter, such as a frame, a magnetic circuit, a damper, a voice coil, and a double-sided tape, is large, the structure is complex, and the manufacturing man-hours are also many. In particular, when an intermediate object for fixing both is interposed between the exciter and the interior material, there is a problem that the vibration efficiency decreases and as a result, the sound quality deteriorates.

[0008] The present invention has been proposed to solve the problems of the prior art as described above. An object of the present invention is to provide a vehicle speaker that can output sound with equivalent characteristics regardless of the dimensional shape of the entire interior and exterior members, and has a small number of components and assembly man-hours. [Means for Solving the Problems]

[0009] The vehicle speaker of the present invention has the following configuration. (1) A plate-shaped vibration member. (2) A vibration surface portion formed on a part of the vibration member. (3) A non-vibration surface portion formed on a part of the vibration member. (4) A partitioning portion that partitions the vibrating surface portion and the non-vibrating surface portion and is provided on the vibrating surface portion. (5) A voice coil fixed to the vibrating surface portion. (6) A holding member fixed to the non-vibrating surface portion. (7) A magnetic circuit fixed to the holding member corresponding to the voice coil. (8) The partitioning portion has a concave groove shape that surrounds at least a part of the vibrating surface portion, and the thickness from the lower surface of the vibrating surface portion to the bottom surface of the concave groove shape of the partitioning portion is thinner than the thickness from the lower surface of the vibrating surface portion to the upper surface of the vibrating surface portion. (9) The non-vibrating surface portion is thicker than the vibrating surface portion. The vehicle speaker of the present invention has the following configuration. (1) A plate-shaped vibrating member. (2) A vibrating surface portion formed on a part of the vibrating member. (3) A non-vibrating surface portion formed on a part of the vibrating member. (4) A partitioning portion that partitions the vibrating surface portion and the non-vibrating surface portion and is provided on the vibrating surface portion. (5) A voice coil fixed to the vibrating surface portion. (6) A holding member fixed to the non-vibrating surface portion. (7) A magnetic circuit fixed to the holding member corresponding to the voice coil. (8) The partitioning portion has a concave groove shape that surrounds at least a part of the vibrating surface portion, and the thickness from the lower surface of the vibrating surface portion to the bottom surface of the concave groove shape of the partitioning portion is thinner than the thickness from the lower surface of the vibrating surface portion to the upper surface of the vibrating surface portion. (9) A rib surrounding the vibrating surface portion is provided. Also, the vehicle speaker of the present invention has the following configuration. The vehicle speaker of the present invention has the following configuration. (1) A plate-shaped vibrating member. (2) A vibrating surface portion formed on a part of the vibrating member. (3) A non-vibrating surface portion formed on a part of the vibrating member. (4) A partitioning portion that partitions the vibrating surface portion and the non-vibrating surface portion and is provided on the vibrating surface portion. (5) A voice coil fixed to the vibrating surface portion. (6) A holding member fixed to the non-vibrating surface portion. (7) A magnetic circuit fixed to the holding member corresponding to the voice coil. (8) The partitioning portion has a concave groove shape that surrounds at least a part of the vibrating surface portion, and the thickness from the lower surface of the vibrating surface portion to the bottom surface of the concave groove shape of the partitioning portion is thinner than the thickness from the lower surface of the vibrating surface portion to the upper surface of the vibrating surface portion. (9) A vibration control portion for controlling the vibration is provided on the vibrating surface portion. (10) The voice coil includes a coil bobbin, and a cylindrical voice coil mounting portion is provided on the vibrating surface portion. (11) The vibration control portion is connected to the voice coil mounting portion. The vehicle speaker of the present invention has the following configuration. (1) A plate-shaped vibrating member. (2) A vibrating surface portion formed on a part of the vibrating member. (3) A non-vibrating surface portion formed on a part of the vibrating member. (4) A partitioning portion that partitions the vibrating surface portion and the non-vibrating surface portion and is provided on the vibrating surface portion. (5) A voice coil fixed to the vibrating surface portion. (6) A holding member fixed to the non-vibrating surface portion. (7) A magnetic circuit fixed to the holding member corresponding to the voice coil. (8) The partitioning portion has a concave groove shape surrounding at least a part of the vibrating surface portion, and the thickness from the lower surface of the vibrating surface portion to the bottom surface of the concave groove shape of the partitioning portion is thinner than the thickness from the lower surface of the vibrating surface portion to the upper surface of the vibrating surface portion. (9) A vibration damping portion for controlling the vibration is provided on the vibrating surface portion. (10) The voice coil includes a coil bobbin, and a cylindrical voice coil mounting portion is provided on the vibrating surface portion. (11) The vibration damping portion includes a first vibration damping portion disposed at the center line portion in the length direction of the vibrating surface portion and adjacent to the voice coil mounting portion, and a second vibration damping portion disposed at other positions of the vibrating surface portion. (12) The height of the first vibration damping portion is higher than that of the second vibration damping portion.

[0010] In the present invention, the following configurations can be adopted. (1) The shape of the vibration surface is any one of a track shape, a circular shape, or an elliptical shape. (2) The non-vibrating surface portion is thicker than the vibrating surface portion. (3) The holding member and the vibrating member are composed of separate members, and both are fixed by an engaging member. (4) Positioning members for both are provided on the holding member and the vibrating member. (5) A rib surrounding the vibrating surface portion is provided. (6) The voice coil includes a coil bobbin, a cylindrical voice coil mounting portion is provided on the vibrating surface portion, and the voice coil is fixed to the vibrating surface portion with the coil bobbin mounted in the voice coil mounting portion. (7 ) The damping portion is formed by a plurality of frame portions or linear rib portions having a cylindrical shape or a polygonal shape, or a combination thereof. ( 8 ) The linear rib portion connects the voice coil mounting portion and the frame portion. ( 9 ) The voice coil and the vibrating surface portion are fixed via a cap mounted on the voice coil.

Advantages of the Invention

[0011] According to the present invention, by forming a vibrating surface portion and a non-vibrating surface portion on a part of a plate-shaped vibrating member, a vehicle speaker can be realized that can be controlled to obtain desired acoustic output characteristics regardless of the shape of the entire plate-shaped member for interior and exterior decoration. Further, by fixing the holding member of the magnetic circuit to the vibrating surface portion, it becomes possible to simplify the fixing structure of the magnetic circuit, the voice coil, and the vibrating member.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Embodiments for Carrying Out the Invention

[0013] [1. First Embodiment] [1-1. Configuration] As shown in FIGS. 1 to 3, the vehicle speaker of the present embodiment has a vibration member 1, a magnetic circuit 2, and a voice coil 3. The vibration member 1 is a panel-shaped vibration member that forms a part of an interior material inside a vehicle such as a pillar, a door, a dashboard, an instrument panel, a console box, or a ceiling. As an example, it is a tray-shaped member with four curved sides rising up. Since the vibration member 1 is used by being attached to a vehicle in various directions and thus the vertical positional relationship fluctuates during use, for the sake of convenience in explanation, the following description will be made with the center of the curved panel of the vibration member 1 being downward and the opening being upward.

[0014] The magnetic circuits 2 are provided in the same number corresponding to the voice coils 3. The magnetic circuit 2 of the present embodiment uses an internal magnetic type magnetic circuit, but an external magnetic type magnetic circuit may also be used. The magnetic circuit 2 includes a yoke 4, a magnet 5, and a plate 6. The voice coil 3 is wound around a coil bobbin 7. The coil bobbin 7 is fixed to the vibration member 1. In the first embodiment, there are two voice coils 3, but there may be one or three or more. The coil bobbin 7 is a cylindrical member, and the voice coil 3 is wound around its periphery.

[0015] The holding member 8 is a holder that holds the magnetic circuit 2 and is generally also referred to as a magnetic circuit frame. The holding member 8 is, as an example, a frame-shaped member. The holding member 8 has a shape and dimensions such that it covers the vibration surface portion 10 (described later) provided on the vibration member 1 from above.

[0016] The vibration member 1 is provided with fixing convex portions 9 for fixing the vibration member 1 to the vehicle side. Using the notch provided in the convex portion 9, the vibration member 1 is screwed or clipped to the vehicle side. The convex portion 9 is not limited to this shape, and the number can also be increased or decreased as needed. It is also possible to adhere the outer periphery of the vibration member 1 using an adhesive or the like without providing the convex portion 9.

[0017] The vibrating member 1 has a vibrating surface portion 10 and a non-vibrating surface portion 11. The vibrating surface portion 10 is a thin portion provided at the central portion of the vibrating member 1 and vibrates when an acoustic signal is output. The vibrating surface portion 10 of the first embodiment has an elongated track shape (the two sides in the length direction are straight lines and both ends are semi-circular) along the outer shape of the vibrating member 1.

[0018] The non-vibrating surface portion 11 is a thicker portion than the vibrating surface portion 10 provided so as to surround the vibrating surface portion 10 at the peripheral portion of the vibrating member 1 and does not vibrate even when an acoustic signal is output. However, since the non-vibrating surface portion 11 is provided as a part of the vibrating member 1 together with the vibrating surface portion 10, when the vibrating surface portion 10 vibrates during the output of the acoustic signal, it is inevitable that the vibration is transmitted to the non-vibrating surface portion 11. In the present invention, the non-vibrating surface portion 11 means a portion that vibrates less than the vibrating surface portion 10 during the output of the acoustic signal and substantially does not affect the output characteristics of the acoustic signal.

[0019] The vibrating member 1 has a partitioning portion 12 that partitions the vibrating surface portion 10 and the non-vibrating surface portion 11 and suppresses the vibration transmission from the vibrating surface portion 10 to the non-vibrating surface portion 11 during the output of the acoustic signal. In the first embodiment, it is formed in a rib shape that protrudes toward the opening direction of the vibrating member 1 rather than the non-vibrating surface portion 11. The partitioning portion 12 does not necessarily need to be formed around the entire circumference of the vibrating surface portion 10, but from the viewpoint of stabilizing the characteristics, it is more preferable to form it around the entire circumference of the vibrating surface portion 10. In the present embodiment, the partitioning portion 12 is provided around the entire circumference of the track-shaped vibrating surface portion 10. Among them, at the arc-shaped portions at both ends in the length direction of the vibrating surface portion 10, as shown in the cross-sectional view of FIG. 5, a low-rib-shaped partitioning portion 12 is provided. Also, as shown in the cross-sectional view of FIG. 6, for the two side portions along the length direction of the vibrating surface portion 10, a rib-shaped partitioning portion 12 that protrudes to a height several times the thickness of the non-vibrating surface portion 11 is provided. As shown in FIG. 3, since the holding member 8 is fitted and mounted inside the high-rib-shaped partitioning portion 12 provided on the two sides in the length direction, in order to improve the workability of fitting, the surface of the partitioning portion 12 on the vibrating surface portion 10 side has an inclined surface that spreads upward toward the non-vibrating surface portion 11 side.

[0020] As shown in FIGS. 4 to 6, the vibrating member 1 is provided with a positioning portion 13 for accurately positioning the holding member 8 on the vibrating member 1. The positioning portion 13 is a rectangular cylindrical member with an open upper part, and is provided on the non-vibrating surface portion 11. The inner wall surface of the cylindrical member is an inclined surface that widens upward. The positioning portion 13 is provided at the outer sides of the four corners of the vibrating surface portion 10, that is, at the ends of the rib-shaped partition portions 12 with a higher side on two sides respectively. The vibrating member 1 is provided with locking holes 14 for fixing the holding member 8 to the vibrating member 1. The locking holes 14 are provided horizontally along the surface of the vibrating member 1 at the base of the rib-shaped partition portion 12 with a higher side. In this embodiment, since two rib-shaped partition portions 12 with a higher side are provided linearly so as to sandwich the vibrating surface portion 10, two locking holes 14 are provided in each partition portion 12 respectively.

[0021] As shown in FIGS. 3 and 6, the vibrating member 1 has a voice coil mounting portion 15 for mounting the voice coil 3 and the coil bobbin 7. The voice coil mounting portion 15 is a cylindrical frame portion with an open upper part into which the lower part of the coil bobbin 7 of the voice coil 3 is fitted. Two voice coil mounting portions 15 are provided on the vibrating surface portion 10 of the vibrating member 1 according to the number of voice coils 3. By fixing the coil bobbin 7 and the voice coil mounting portion 15 with an adhesive, the voice coil 3 is integrated with the vibrating surface portion 10 via the coil bobbin 7. Lead wires 16 are drawn out from both ends of the voice coil 3. The lead wires 16 are drawn out toward the arc-shaped portion at the end in the length direction of the track-shaped vibrating surface portion 10.

[0022] As shown in FIGS. 5 and 6, the vibrating member 1 is provided with a terminal fixing portion 17 for connecting the lead wire 16 of the voice coil 3 to an external audio device. The terminal fixing portion 17 is a cylindrical member protruding upward from the surface of the non-vibrating surface portion 11. The terminal fixing portion 17 is provided close to the arcuate portion at the end in the length direction of the track-shaped vibrating surface portion 10. At the upper end of the terminal fixing portion 17, it is possible to horizontally fix the connection terminal 18. As the fixing method of the connection terminal 18, press-fitting, adhesion, welding, etc. can be appropriately used. The lead wire 16 of the voice coil 3 is connected to two metal connection terminal portions of the terminal fixing portion 17 respectively.

[0023] As shown in FIGS. 7 and 8, the holding member 8 has a magnetic circuit mounting portion 19, a reinforcing rib 20, a leg portion 21, and a locking projection 22. The magnetic circuit mounting portion 19 is a cylindrical opening provided in the central portion of the frame-shaped holding member 8, and is fixed with the magnetic circuit 2 fitted therein. The magnetic circuit mounting portion 19 is arranged along the length direction of the vibrating surface portion 10, and two are provided corresponding to the positions of the voice coils 3 provided on the vibrating surface portion 10.

[0024] Around the magnetic circuit mounting portion 19, a reinforcing rib 20 is provided to reinforce the magnetic circuit mounting portion 19. The reinforcing rib 20 has a triangular shape and is provided in four directions between the outer peripheral surface of the cylindrical magnetic circuit mounting portion 19 and the upper surface of the holding member 8. In this embodiment, the magnetic circuit 2 and the magnetic circuit mounting portion 19 are fixed by insert molding, but fixing by press-fitting, adhesion, etc. may also be used.

[0025] At the four corners of the holding member 8, there are leg portions 21 protruding toward the vibrating member 1 side. The leg portions 21 are generally called guide pins and are provided at positions corresponding to the positioning portions 13 provided on the vibrating member 1. That is, these leg portions 21 and the positioning portions 13 correspond to the "member for positioning the holding member and the vibrating member" of the present invention. In this embodiment, four leg portions 21 are provided, but the number of leg portions 21 can vary depending on the size of the holding member 8. The leg portions 21 are provided with inclined surfaces around them so that the lower ends become thinner for easy insertion into the positioning portions 13.

[0026] The holding member 8 is provided with locking protrusions 22 for fixing the holding member 8 to the vibrating member 1. The locking protrusions 22 are provided on two sides along the length direction of the holding member 8, and two locking protrusions 22 are provided opposite to the locking holes 14 of the partition portion 12 respectively. The lower end of the locking protrusion 22 protrudes in a keyhole shape outward. The locking protrusion 22 can be deformed in a direction perpendicular to the length direction of the partition portion 12 by the elasticity of the resin-made holding member 8. The locking protrusion 22 and the locking hole 14 correspond to the "engaging member for fixing the holding member and the vibrating member" of the present invention. The locking protrusion 22 is not limited to this shape, and the number can also be increased or decreased as needed. The holding member 8 can also be fixed by adhering the leg portion 21 without providing the locking protrusion 22.

[0027] [2. Operation of the Embodiment] In the present embodiment, the voice coil 3 fixed to the vibration surface portion 10 is electrically connected to an external device by the lead wire 16. When an electrical signal from the external device is transmitted through the lead wire 16 to the voice coil 3, the voice coil 3 vibrates due to the interaction between the magnetic circuit 2 and the voice coil 3. Since the voice coil 3 is fixed to the vibrating member 1 via the voice coil mounting portion 15, when the voice coil 3 vibrates, the vibration surface portion 10 of the vibrating member 1 vibrates and sound is generated.

[0028] In this embodiment, the vibration of the voice coil 3 is controlled by the vibration surface portion 10 inside the partition portion 12 provided in the vibration member 1. That is, the vibration of the voice coil 3 generated by an electrical signal from an external device is blocked by the partition portion 12 and is not transmitted to the surrounding non-vibration surface portion 11. Further, the vibration surface portion 10 is formed to be thinner than the surrounding non-vibration surface portion 11, so that the vibration of the voice coil 3 is more likely to be transmitted only to the vibration surface portion 10. Therefore, it is possible to vibrate only the vibration surface portion 10 within the range controlled by the partition portion 12 integrally with the voice coil 3, rather than the entire vibration member 1. As a result, according to the vehicle speaker of this embodiment, it is possible to reproduce a sound with less distortion and a clean sound, which could not be achieved simply by attaching an exciter to a vibration member such as a pillar or a door.

[0029] In this embodiment, the magnetic circuit 2 is fixed in a state of being fitted inside the magnetic circuit mounting portion 19 and is held by the holding member 8. The holding member 8 holding the magnetic circuit 2 is accurately positioned on the vibration member 1 by inserting the leg portion 21 into the positioning portion 13 provided in the vibration member 1. The holding member 8 is simply fixed to the non-vibration surface portion 11 of the vibration member 1 without using tools or adhesives by fitting the locking protrusion 22 provided on the holding member 8 into the locking hole 14 of the vibration member 1.

[0030] The voice coil 3 is firmly fixed to the vibration surface portion 10 by adhering the coil bobbin 7 to the voice coil mounting portion 15. The voice coil mounting portion 15 is a cylindrical frame portion that is open upward so that the lower portion of the coil bobbin 7 around which the voice coil 3 is wound can be fitted, and the voice coil 3 can be fixed by a surface. Further, the inclination of the coil bobbin 7 can be prevented by the voice coil mounting portion 15. Therefore, it is possible to eliminate members such as dampers that have been conventionally used in the structure of speakers, and the assembly becomes easy. In this embodiment, by adopting a damperless structure, the reliability is improved, and it becomes possible to withstand long-term use as a vehicle speaker.

[0031] [3. Effects of the Embodiment] (1) In a vehicle speaker having a vibrating member 1, a magnetic circuit 2, and a voice coil 3, by providing a partitioning portion 12 that partitions the vibrating surface portion 10 and the non-vibrating surface portion 11 on the vibrating member 1, only the vibrating surface portion 10 is vibrated according to an input signal. As a result, by setting the size of the vibrating surface portion 10 to a certain value, regardless of the dimensional shape of the vibrating member 1, acoustic output with the same characteristics becomes possible, and equivalent acoustic output can be expected even when installed in interior materials with various shapes and wall thicknesses. Also, when the entire vibrating member 1 is vibrated as in the prior art, the vibration frequency decreases and reproduction in the high frequency range becomes difficult. However, in this embodiment, by forming a vibrating surface portion 10 with a small area on a part of the vibrating member 1, it becomes possible to reproduce acoustic output even in the high frequency range.

[0032] As described above, in this embodiment, it is possible to realize a vehicle speaker that can reproduce a clear sound with less distortion while achieving freedom in the installation position of the speaker and space saving, and it is possible to create a high-quality acoustic space in the vehicle interior.

[0033] (2) By fixing the voice coil 3 within the partition of the vibrating surface portion 10 and fixing the magnetic circuit 2 to the non-vibrating surface portion 11, it becomes possible to vibrate only the vibrating surface portion 10 without vibrating the magnetic circuit 2, and it is possible to reproduce a sound with less distortion and a clear sound.

[0034] (3) By reducing the intervening parts between each member such as a damper, it is possible to directly transmit the vibration of the voice coil 3 to the vibrating surface portion 10. By adopting a damperless structure, assembly becomes easy, reliability is improved, and it becomes possible to withstand long-term use as a vehicle speaker.

[0035] (4) By making the voice coil mounting portion 15 cylindrical and increasing the adhesive area between the coil bobbin 7 and the vibrating member 1, the vibration of the voice coil 3 can be directly transmitted to the vibrating surface portion 10, and it becomes possible to vibrate the vibrating surface portion 10 as per the input signal.

[0036] (5) There are two types of speaker coils: moving coil type (MC type) and moving magnet type (MM type). In this embodiment, a moving coil type (MC type) coil is used, which makes it possible to vibrate a lightweight voice coil and, compared to the MM type, makes it possible to vibrate the vibrating surface portion 10 in accordance with the input signal.

[0037] (6) By fitting the retaining member 8 inside the tall rib-shaped partition section 12 provided on two sides along the length of the vibrating surface section 10, the retaining member 8 can be used as both a member that blocks the transmission of vibrations from the vibrating surface section 10 to the non-vibrating surface section 11 and a member that fixes the retaining member 8 to the non-vibrating surface section 11, making it possible to simplify the overall structure of the speaker.

[0038] 5. Other embodiments As described above, several embodiments of the present invention have been described, but the scope of the invention is not intended to be limited thereto, and the invention may be embodied in various other forms as listed below without departing from the spirit of the invention, and various omissions, substitutions, and modifications may be made. These embodiments, combinations thereof, and further modifications thereof are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents as described in the claims. The following are examples of embodiments included in the present invention.

[0039] (1) When the partitioning portion 12 of the vibrating surface portion 10 is ribbed, it is also possible to provide a groove at the inner lower end of the rib shape. This prevents the vibrating surface portion 10 from vibrating separately and allows the vibrating surface portion 10 to vibrate as a unit, resulting in sound with less distortion. The groove at the inner lower end of the rib shape of the partitioning portion 12 does not necessarily have to be provided around the entire circumference of the vibrating surface portion 10, but it is better if it is around the entire circumference. Also, the rib shape of the partitioning portion 12 does not necessarily have to be provided around the entire circumference of the vibrating surface portion 10, but it is better if it is around the entire circumference.

[0040] (2) The partitions 12 of the vibrating surface portion 10 do not necessarily have to be ribbed, and may be grooved. The grooves of the partitions 12 do not necessarily have to be around the entire periphery of the vibrating surface portion 10, but it is preferable that they are around the entire periphery.

[0041] (3) The shape of the vibrating surface portion 10 is not limited to an elongated track shape (two sides along the length direction are straight lines and both ends in the length direction are semi-circular) along the outer shape of the vibrating member, but a circular or elliptical shape is preferable. Also, the number of the vibrating surface portions 10 is not limited to one, and a plurality of them can be formed according to the number of voice coils.

[0042] (4) It is also possible to sandwich a film of an elastomer material or coat a part or all of the contact portion between the holding member 8 and the vibrating member 1. The film of the elastomer material eliminates the gap between the vibrating member 1 and the holding member 8, and the vibration of the voice coil 3 is directly transmitted to the vibrating surface portion 10, making it more possible to vibrate the vibrating surface portion 10 as per the signal, so that reproduction up to a high frequency becomes possible.

[0043] (5) As the fixing means between the voice coil 3 and the vibrating surface portion 10, in addition to adhesion in the illustrated embodiment, insert molding, ultrasonic welding, etc. can be used.

[0044] (6) As the means for fixing the holding member 8 and the vibrating member 1, in addition to the engaging member combining the locking hole 14 and the locking projection 22, press fitting, adhesion, or molding both of them into one resin molded product is also possible.

[0045] (7) A vibration damping portion for controlling the vibration can be formed on the vibrating surface portion 10. The vibration damping portion can be formed, for example, by forming one or a plurality of linear rib portions 23d at the central portion along the length direction of the vibrating surface portion 10 as shown in FIG. 9. The "control" by the vibration damping portion means controlling the resonance of the vibrating surface portion 10 due to the vibration of the voice coil 3. By forming the vibration damping portion, it becomes possible to prevent the division and resonance of the vibrating surface portion 10, and it becomes possible to generate a sound with less distortion.

[0046] (8) As shown in FIGS. 10 and 11, the linear rib portion 23d serving as the vibration damping portion may be connected to the voice coil mounting portion 15. By connecting the linear rib portion 23d and the voice coil mounting portion 15, it becomes possible to efficiently transmit the vibration generated from the voice coil 3 to the vibration surface portion 10 by the vibration damping portion.

[0047] (9) The vibration damping portion can be formed by combining a plurality of frame portions or linear rib portions having a cylindrical or polygonal shape and different sizes, or a combination thereof. For example, as shown in FIGS. 10 and 11, a small hexagonal frame portion 23a can be provided in a portion close to the voice coil mounting portion 15, and a plurality of large hexagonal frame portions 23b can be formed in a portion close to the partition portion 12. In this way, by making the shape or size of the vibration damping portion different between the central portion and the peripheral portion of the vibration surface portion 10, it becomes possible to control resonance. Further, a frame portion 23c taller than the small frame portion 23a is provided at the center line portion in the length direction of the vibration surface portion 10, so that the rigidity in the length direction can be further increased. Note that the taller frame portion 23c is taller than the large frame portion 23b. Furthermore, the small frame portion 23a, the large frame portion 23b, the taller frame portion 23c, and the voice coil mounting portion 15 are connected by a linear rib portion 23d. With these configurations, compared to a mere plate-shaped vibration surface portion 10, the rigidity of each part of the vibration surface portion 10 can be appropriately changed from the voice coil mounting portion 15 to the vicinity of the partition portion 12. Thereby, it becomes possible to adjust the vibration characteristics (resonance performance) of the vibration surface portion 10 and provide a higher-quality acoustic space. That is, by combining the frame portions 23a, 23b, 23c having a plurality of sizes and formed of a cylindrical or polygonal shape and the linear rib portion 23d, resonance dispersion can be achieved, and it becomes possible to relatively stabilize the frequency characteristics from the low frequency range to the high frequency range.

[0048] (9) The frame portions such as the small frame portion 23a, the large frame portion 23b, and the taller frame portion 23c that constitute the vibration damping portion are not limited to a hexagonal shape as long as they are frame portions having a plurality of sizes and formed of a cylindrical or polygonal shape, and may be cylindrical, polygonal frame portions such as triangular or square.

[0049] (10) The vibration damping part may consist of one or more linear rib parts 23d without being combined with each frame part 23a, 23b, 23c. Also, the shape of the linear rib part 23d may be a straight line or a curve, and it doesn't matter where it is formed as long as it is on the vibration surface part 10. Also, even when the linear rib part 23d is formed in combination with each frame part 23a, 23b, 23c, the linear rib part 23d doesn't necessarily have to be connected to the voice coil mounting part 15, and it may connect the frame parts 23a, 23b, 23c to each other. On the other hand, it may be connected to the voice coil mounting part 15 and not connect the frame parts 23a, 23b, 23c to each other.

[0050] (11) In the above-described embodiment, a damper is not provided because the coil bobbin 7 is adhered to the voice coil mounting part 15. However, as shown in FIG. 10, a damper 24 that supports the coil bobbin 7 (voice coil 3) by the holding member 8 can also be provided. By providing the damper 24, it becomes possible to handle the voice coil 3 integrally with the holding member 8, and at the same time as fixing the holding member 8 to the vibrating member 1, it becomes possible to fix the voice coil 3 to the vibrating member 1.

[0051] (12) As shown in FIG. 10, a cap 25 fixed to the tip of the coil bobbin 7 can also be provided. By using the cap 25, the fixing of the coil bobbin 7 and the vibration surface part 10 can be joined by a simple operation. In this case, it is preferable to provide a contact part with the cap 25 on the inner part of the voice coil mounting part 15 of the vibration surface part 10.

Explanation of Reference Numerals

[0052] 1...Vibrating member 2...Magnetic circuit 3...Voice coil 4...Yoke 5...Magnet 6...Plate 7...Coil bobbin 8...Holding member 9...Protrusion 10...Vibration surface part 11...Non-vibration surface part 12...Partition part 13…Positioning part 14…Locking hole 15…Voice coil mounting part 16…Lead wire 17…Terminal fixing part 18…Connection terminal 19…Magnetic circuit mounting part 20…Reinforcing rib 21…Leg part 22…Locking projection 23a…Small frame part 23b…Large frame part 23c…Tall frame part 23d…Linear rib part 24…Damper 25…Cap

Claims

1. A plate-shaped vibration member, A vibration surface portion formed on a part of the vibration member, A non-vibration surface portion formed on a part of the vibration member, A partition portion that partitions the vibration surface portion and the non-vibration surface portion and is provided on the vibration surface portion, A voice coil fixed to the vibration surface portion, A holding member fixed to the non-vibration surface portion, A magnetic circuit fixed to the holding member corresponding to the voice coil, Comprising, The partition portion has a concave groove shape surrounding at least a part of the vibration surface portion, and the thickness from the lower surface of the vibration surface portion to the bottom surface of the concave groove shape of the partition portion is thinner than the thickness from the lower surface of the vibration surface portion to the upper surface of the vibration surface portion, A vehicle speaker characterized in that the non-vibration surface portion is thicker than the vibration surface portion.

2. A plate-shaped vibration member, A vibration surface portion formed on a part of the vibration member, A non-vibration surface portion formed on a part of the vibration member, A partition portion that partitions the vibration surface portion and the non-vibration surface portion and is provided on the vibration surface portion, A voice coil fixed to the vibration surface portion, A holding member fixed to the non-vibration surface portion, A magnetic circuit fixed to the holding member corresponding to the voice coil, Comprising, The partition portion has a concave groove shape surrounding at least a part of the vibration surface portion, and the thickness from the lower surface of the vibration surface portion to the bottom surface of the concave groove shape of the partition portion is thinner than the thickness from the lower surface of the vibration surface portion to the upper surface of the vibration surface portion, A vehicle speaker characterized in that a rib surrounding the vibration surface portion is provided.

3. A plate-shaped vibration member, A vibration surface portion formed on a part of the vibration member, A non-vibration surface portion formed on a part of the vibration member, A partition portion that partitions the vibration surface portion and the non-vibration surface portion and is provided on the vibration surface portion, A voice coil fixed to the vibration surface portion, A holding member fixed to the non-vibration surface portion, A magnetic circuit fixed to the holding member corresponding to the voice coil, Comprising, The partition portion has a concave groove shape surrounding at least a part of the vibration surface portion, and the thickness from the lower surface of the vibration surface portion to the bottom surface of the concave groove shape of the partition portion is thinner than the thickness from the lower surface of the vibration surface portion to the upper surface of the vibration surface portion, A vibration control portion for controlling the vibration is provided on the vibration surface portion, The voice coil includes a coil bobbin, and a cylindrical voice coil mounting portion is provided on the vibration surface portion, A vehicle speaker characterized in that the vibration control portion is connected to the voice coil mounting portion.

4. A plate-shaped vibration member, A vibrating surface portion formed on a part of the vibrating member, A non-vibrating surface portion formed on a part of the vibrating member, A partitioning portion that partitions the vibrating surface portion and the non-vibrating surface portion and is provided on the vibrating surface portion, A voice coil fixed to the vibrating surface portion, A holding member fixed to the non-vibrating surface portion, A magnetic circuit fixed to the holding member corresponding to the voice coil, Comprising, The partitioning portion has a concave groove shape that surrounds at least a part of the vibrating surface portion, and the thickness from the lower surface of the vibrating surface portion to the bottom surface of the concave groove shape of the partitioning portion is thinner than the thickness from the lower surface of the vibrating surface portion to the upper surface of the vibrating surface portion, A vibration damping portion for controlling the vibration is provided on the vibrating surface portion, The voice coil includes a coil bobbin, and a cylindrical voice coil mounting portion is provided on the vibrating surface portion, The vibration damping portion includes a first vibration damping portion disposed at a center line portion in the longitudinal direction of the vibrating surface portion and adjacent to the voice coil mounting portion, and a second vibration damping portion disposed at other positions of the vibrating surface portion, A vehicle speaker characterized in that the height of the first vibration damping portion is higher than that of the second vibration damping portion.

5. The vehicle speaker according to any one of claims 1 to 4, wherein the shape of the vibrating surface portion is any one of a track shape, a circular shape, or an elliptical shape.

6. The vehicle speaker according to any one of claims 2 to 4, wherein the non-vibrating surface portion is thicker than the vibrating surface portion.

7. The vehicle speaker according to any one of claims 1 to 6, wherein the holding member and the vibrating member are composed of separate members, and both are fixed by an engaging member.

8. The vehicle speaker according to claim 7, wherein positioning members for both are provided on the holding member and the vibrating member.

9. The vehicle speaker according to any one of claims 1, 3 to 8, characterized in that a rib surrounding the vibrating surface portion is provided.

10. The voice coil includes a coil bobbin, a cylindrical voice coil mounting portion is provided on the vibrating surface portion, the coil bobbin is mounted in the voice coil mounting portion, and the voice coil is fixed to the vibrating surface portion via the coil bobbin. The vehicle speaker according to any one of claims 1 to 9.

11. The vibration damping part is formed by a plurality of frame parts or linear rib parts having a cylindrical or polygonal shape and different sizes, or a combination thereof. The vehicle speaker according to claim 3 or claim 4, characterized in that.

12. The vehicle speaker according to claim 11, characterized in that the linear rib part connects the voice coil mounting part and the frame part.

13. The vehicle speaker according to any one of claims 1 to 12, characterized in that the voice coil and the vibration surface part are fixed via a cap attached to the voice coil.

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