Exciter and speaker

Abstract

Provided are an exciter 1 and a speaker for which the assembly man-hours can be decreased by simplifying a fixing structure, and in which a voice coil 3 can be easily and reliably mounted to a vibrating member 20 to enable reproduction of quality sound.　An exciter 1 of the present invention is provided with a magnetic circuit 2 fixed to a holding member 11, a voice coil 3, and an engaging member 9 attached to the voice coil 3. The engaging member 9 includes an engaging portion 9e for engaging an engaged portion 21 of the vibrating member 20, and a pressed portion 9d for engaging the engaged portion 21 and the engaging portion 9e with each other.

Description

[Technical Field]

[0001] The present invention relates to an exciter and a speaker, and more particularly to an exciter and a speaker that are fixed to the interior or exterior of a vehicle. [Background technology]

[0002] Speakers that reproduce sound by vibrating a cone-shaped diaphragm have been widely used for reproducing music and voices, and are typically embedded in the left and right front door compartments of an automobile.

[0003] In recent years, in order to create a high-quality acoustic space inside a vehicle, multiple speakers are installed not only in the front door but also in the rear door, back door, dashboard, ceiling, and other limited spaces within the vehicle. Therefore, speakers are required to have flexibility in installation location and space-saving features. However, speakers with diaphragms require a certain amount of installation space, and in order to maintain high-quality sound, the speaker itself must be large, making it difficult to achieve flexibility in installation location and space-saving features.

[0004] Therefore, as shown in Patent Documents 1 to 3, for example, exciters have been proposed that vibrate interior materials that come into contact with them by vibrating themselves, thereby generating sound from the interior materials. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5758021 [Patent Document 2] Patent No. 3953454 [Patent Document 3] Japanese Patent Application Laid-Open No. 2005-14793 Summary of the Invention [Problem to be solved by the invention]

[0006] In such exciters, the voice coil must be securely fixed to a vibrating member, such as an interior material. However, when using double-sided adhesive tape, as in the conventional techniques described in Patent Documents 1 and 2, for example, the vibrating member and voice coil cannot be directly pressed against each other when installing the exciter. In particular, the portion where the vibrating member and voice coil are fixed is covered by a cylindrical magnetic circuit, which gets in the way and prevents the double-sided adhesive tape from being properly pressed against the vibrating member, making it difficult to securely fix the voice coil to the vibrating member. Furthermore, in such exciters, the voice coil is supported by a magnetic circuit and its frame so that it can vibrate. Therefore, even if a pressing force is applied to the magnetic circuit and its frame when fixing the voice coil to the vibrating member, the force is not transmitted to the voice coil. As such, if the voice coil and the vibrating member are not in close contact with each other, it is difficult to vibrate the vibrating member together with the voice coil, resulting in problems such as reduced vibration efficiency and poor sound quality.

[0007] The prior art described in Patent Document 3 involves forming a joint member integrally with a portion of an automobile's interior or exterior material, which is a vibrating member, by injection molding, and then fastening the voice coil to the joint member by screwing. While this prior art has the advantage of securely fastening the voice coil to the vibrating member via a frame without applying force to the voice coil, it also suffers from the drawback of a complex configuration, requiring a male thread on the joint member and a female thread on the voice coil for screw fastening. The screw fastening process requires rotating the voice coil relative to the joint member several times, which makes it difficult to fasten the two in one go. This results in inferior assembly workability compared to prior art using double-sided adhesive tape. Furthermore, the need to prepare a dedicated joint member increases costs. Particularly when retrofitting an exciter at the user's request, the inability to form the joint member integrally with a portion of the automobile's interior or exterior material poses a problem: the exciter installation is time-consuming and labor-intensive.

[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 an exciter and a speaker that can reduce the number of assembly steps by simplifying the fixing structure and can reproduce high-quality sound by simply and reliably attaching the voice coil to the vibrating member. [Means for solving the problem]

[0009] The exciter of the present invention has the following configuration. (1) A magnetic circuit fixed to a holding member. (2) Voice coil. (3) An engaging member attached to the voice coil. (4) The engaging member includes an engaging portion that engages with an engaged portion provided on the vibration member, and the engaging portion The pressing member has a pressed portion that engages with the engaging portion. (5) An insertion portion for a pressing jig capable of pressing the pressed portion is provided. (6) The insertion portion is a through hole that penetrates the center of the magnetic circuit. The exciter of the present invention has the following configuration. (1) A magnetic circuit fixed to a holding member. (2) Voice coil. (3) An engaging member attached to the voice coil. (4) The engaging member includes an engaging portion that engages with an engaged portion provided on the vibration member, and the engaging portion The pressing member has a pressed portion that engages with the engaging portion. (5) A pressing portion that presses the pressed portion is provided on the magnetic circuit or a holding member of the magnetic circuit. Furthermore, the exciter of the present invention has the following configuration. (1) A magnetic circuit fixed to a holding member. (2) Voice coil. (3) An engaging member attached to the voice coil. (4) The engaging member includes an engaging portion that engages with an engaged portion provided on the vibration member, and the engaging portion The pressing member has a pressed portion that engages with the engaging portion. (5) The engaging member has an outer peripheral wall portion on which the voice coil is attached, a bottom surface portion that abuts against the vibrating member, and a protruding portion that protrudes toward the magnetic circuit. (6) The protruding portion is provided with a pressed portion.

[0010] In the present invention, the following configuration can be adopted. (1 The engaging member has an engaging portion formed on the outer peripheral wall portion. (2 ) The engaging member has a cushioning material formed on its surface. ( 3 The voice coil is supported on the holding member by a damper. ( 4 ) A vibrating member having the engaged portion is provided, and an exciter is attached to the vibrating member. ( 5 The engaging portion is formed of a locking claw or a locking hole, and the engaged portion is formed of a locking hole or a locking claw that corresponds to the engaging portion. ( 6 The engaged portion is formed by a voice coil mounting portion that protrudes from the vibrating member, and the engaging member is attached to the voice coil mounting portion. ( 7 ) the engaging member has a bottom surface portion that abuts against the vibration member, A concave or convex surface is formed on the bottom surface of the engaging member and / or on the vibration member. [Effects of the Invention]

[0011] According to the present invention, by attaching an engaging member to the voice coil, it is possible to simplify the fixing structure and reduce the number of assembly steps. Also, by reliably fixing the holding member of the magnetic circuit to the vibrating member, it is possible to provide an exciter and a speaker that can reproduce high-quality sound. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view showing the entire assembled state of a first embodiment. [Figure 2] FIG. 2 is a perspective view of the assembled state of the first embodiment as seen from the rear side. [Figure 3] FIG. 2 is an overall exploded perspective view of the first embodiment. [Figure 4] FIG. 2 is an exploded perspective view showing a vibrating member and a voice coil with a magnetic circuit portion removed in the first embodiment. [Figure 5] FIG. 2 is a longitudinal cross-sectional view showing a vibrating member and a voice coil in the first embodiment. [Figure 6]FIG. 2 is an enlarged perspective view showing a voice coil mounting portion in the first embodiment. [Figure 7] FIG. 2 is an exploded perspective view of a magnetic circuit and an engaging member according to the first embodiment, as viewed from below. [Figure 8] FIG. 2 is an exploded perspective view of a magnetic circuit and an engaging member according to the first embodiment, as viewed from above. [Figure 9] FIG. 3 is a cross-sectional view showing a fixed state of a magnetic circuit in the first embodiment. [Figure 10] FIG. 2 is a cross-sectional view showing a state in which the pressing jig according to the first embodiment is used. [Figure 11] FIG. 10 is an exploded perspective view showing a voice coil and an engaging member in a second embodiment. [Figure 12] FIG. 10 is a cross-sectional view showing a state in which the pressing jig according to the second embodiment is used. DETAILED DESCRIPTION OF THE INVENTION

[0013] [1. First embodiment] [1-1.Configuration] (1) Exciter and vibrating member 1, the exciter 1 of this embodiment is used by being fixed to a vibrating member 20. Examples of the vibrating member 20 include interior and exterior vehicle materials such as pillars, doors, dashboards, instrument panels, console boxes, and ceilings. The exciter 1 of this embodiment is used by being attached to a vehicle or the like in various directions, and therefore its vertical positional relationship varies during use. However, for convenience of explanation, the following description will be given with the vibrating member 20 side as the bottom and the exciter 1 side as the top.

[0014] The vibrating member 20 is not particularly limited in its configuration as long as it can accommodate the exciter 1 of this embodiment. As shown in FIG. 6 , the vibrating member 20 has a voice coil mounting portion 20a for mounting the voice coil 3 and coil bobbin 8 that constitute the exciter 1. In this embodiment, the voice coil mounting portion 20a is a cylindrical frame portion with an open top into which the lower part of the coil bobbin 8 is fitted. However, the shape of the frame is not limited to a cylindrical shape and may be a cylindrical, fan-like, rod-like, or other shape. In this embodiment, the exciter 1 having two magnetic circuits 2 is mounted on the vibrating member 20, so two voice coil mounting portions 20a are provided on the vibrating member 20, corresponding to the number of voice coils 3. A convex portion 22 protruding toward the voice coil 3 is formed in the shape of a dotted annular line on the inside of the voice coil mounting portion 20a. As will be described later, in this embodiment, the engaging member 9 on which the voice coil 3 is mounted is mounted inside the voice coil mounting portion 20a of the vibrating member 20, so the convex portion 22 is formed on the inside of the voice coil mounting portion 20a. When the engaging member 9 is attached to the outside of the voice coil attachment portion 20a, the convex surface portion 22 is preferably formed on the vibrating member 20 on the outside of the voice coil attachment portion 20a.

[0015] (2) Magnetic circuit and voice coil As shown in Fig. 3, the exciter 1 of this embodiment has a magnetic circuit 2 and a voice coil 3. As shown in Figs. 1 and 8, the magnetic circuit 2 is fixed to a frame-shaped holding member 11. In this embodiment, two magnetic circuits 2 and two voice coils 3 are provided for one holding member 11, but one or more magnetic circuits 2 and voice coils 3 may be provided. The magnetic circuit 2 of this embodiment is an internal magnet type magnetic circuit, but an external magnet type magnetic circuit may also be used. As shown in Fig. 3, the magnetic circuit 2 includes a yoke 4, a magnet 5, and a pole piece 6.

[0016] As shown in Figures 3 to 5, the voice coil 3 has a coil bobbin 8, but it may also be composed of just the voice coil 3 without the coil bobbin 8. In this embodiment, there are two voice coils 3, but there may be one or three or more. The coil bobbin 8 is a cylindrical member around which the voice coil 3 is wound, and lead wires 29 are drawn out from both ends of the voice coil 3. The lead wires 29 are connected to connection terminals 31.

[0017] As shown in FIG. 10 , the yoke 4 is cylindrical and has a bottom, with an opening on the voice coil 3 side. The yoke 4 is circular and has a through-hole in its center. A magnet 5 and a pole piece 6 are stacked one above the other within the yoke 4. The pole piece 6, also called a plate, is circular and has a through-hole in its center. As shown in FIG. 10 , the voice coil 3 is inserted into a magnetic gap formed between the yoke 4 and the magnet 5 and pole piece 6. As shown in FIG. 10 , the through-hole in the center of the yoke 4, magnet 5, and pole piece 6 serves as the insertion portion 2 a of a pressing jig 40 that can press a pressed portion 9 d provided on an engaging member 9 (described later). While the insertion portion 2 a is provided in the magnetic circuit 2 in this embodiment, it may be provided in either the magnetic circuit 2 or the holding member 11, as long as it is a component constituting the exciter 1.

[0018] (3) Holding member As shown in Fig. 3, the holding member 11 is a frame that holds the magnetic circuit 2. As shown in Figs. 7 and 8, the holding member 11 has a magnetic circuit mounting portion 12, reinforcing ribs 13, legs 14, and locking projections 15. The magnetic circuit mounting portion 12 is a cylindrical opening provided in the center of the holding member 11, and the magnetic circuit 2 is fitted inside and fixed therein. As shown in Fig. 6, the magnetic circuit mounting portions 12 are arranged along the length direction of a vibration surface portion 23 of the vibrating member 20, which will be described later, and are provided in two locations corresponding to the positions of voice coil mounting portions 20a provided on the vibration surface portion 23.

[0019] 8, reinforcing ribs 13 are provided around the magnetic circuit mounting portion 12 to reinforce the magnetic circuit mounting portion 12. The reinforcing ribs 13 are triangular and are provided in four directions between the outer circumferential surface of the cylindrical magnetic circuit mounting portion 12 and the upper surface of the holding member 11. In this embodiment, the magnetic circuit 2 and the magnetic circuit mounting portion 12 are fixed by adhesive, but they may also be fixed by press fitting, insert molding, or the like.

[0020] 3 and 7, the holding member 11 has legs 14 at its four corners that protrude toward the vibrating member 20. The legs 14 are generally called guide pins, and are provided at positions corresponding to positioning portions 26 provided on the vibrating member 20. In this embodiment, four legs 14 are provided, but the number of legs 14 can vary depending on the size of the holding member 11. The legs 14 have sloped surfaces around their peripheries so that their lower ends become thinner, making them easier to insert into the positioning portions 26.

[0021] As shown in Figures 3, 7, and 8, the holding member 11 is provided with locking protrusions 15 to secure the holding member 11 to the vibrating member 20. The locking protrusions 15 are provided on two sides of the holding member 11 along the length direction, with two locking protrusions 15 provided on each side facing the locking holes 27 of the partition section 25. The lower ends of the locking protrusions 15 protrude outward in a hook shape. The locking protrusions 15 are formed to be elastically deformable, and can be easily secured in a direction perpendicular to the length direction of the partition section 25. The shape of the locking protrusions 15 is not limited to this, and the number of locking protrusions 15 can be increased or decreased as needed. The holding member 11 can also be secured by adhesively adhering the legs 14 without providing the locking protrusions 15.

[0022] (4) Engagement member As shown in FIG. 7, the engaging member 9 is, for example, a cap-shaped member with a reduced diameter on the magnetic circuit 2 side. The engaging member 9 is formed of a resin material with relatively high rigidity, but a buffer material may be provided on its surface by insert molding a thin film of elastomer material with low rigidity that does not interfere with vibration transmission, or by using a thick elastomer material with high rigidity. The buffer material may be provided not only by insert molding, but also by bonding. The engaging member 9 has an outer wall portion 9a on which the voice coil 3 is attached, a bottom portion 9b that abuts against the vibrating member 20, and a protruding portion 9c that protrudes toward the magnetic circuit 2 and is inserted into the coil bobbin 8.

[0023] The engaging member 9 may be attached to the coil bobbin 8 on either the inner or outer peripheral surface of the outer peripheral wall portion 9a, but since it is easier to achieve dimensions and greater precision on the inner peripheral surface, in this embodiment the end of the coil bobbin 8 is fitted onto the inner peripheral surface of the outer peripheral wall portion 9a. The outer peripheral surface of the coil bobbin 8 and the inner peripheral surface of the outer peripheral wall portion 9a are fixed together with an adhesive, thereby integrating the coil bobbin 8 and the engaging member 9.

[0024] Engaging portions 9e are formed on the outer peripheral wall portion 9a, and these engaging portions 9e engage with engaged portions 21 provided on the voice coil mounting portion 20a of the vibrating member 20, which will be described later. The engaging portions 9e are configured as locking claws or locking holes, and the engaged portions 21 provided on the vibrating member 20 are configured as locking holes or locking claws corresponding to the engaging portions 9e. Engagement between the engaging portions 9e and the engaged portions 21 fixes the voice coil 3 to the voice coil mounting portion 20a of the vibrating member 20 via the coil bobbin 8. In this embodiment, the engaging portions 9e are configured as locking claws. The upper ends of the locking claws protrude outward in a hook shape. The locking claws are formed to be elastically deformable and can be elastically deformed toward the center. The shapes of the engaging portions 9e and the engaged portions 21 are not limited to those in this embodiment, and the numbers can be increased or decreased as necessary.

[0025] As shown in FIG. 7 , the bottom surface portion 9b has an annular shape and abuts against the vibrating surface portion 23 of the vibrating member 20. The surface of the vibrating member 20 that contacts the lower surface of the bottom surface portion 9b may be flat, or a convex portion protruding toward the vibrating member 20 may be formed on the lower surface of the bottom surface portion 9b in the form of a dotted annular line. This convex portion is not limited to a dotted annular line, and any shape or type of line is acceptable. By providing a convex portion on the abutting surface with the vibrating member 20, the contact area between the bottom surface portion 9b and the vibrating member 20 can be minimized, the coil bobbin 8 and the bottom surface portion 9b are tightly attached, and the vibration of the voice coil 3 can be reliably transmitted to the vibrating member 20. As long as the contact area between the bottom surface portion 9b and the vibrating member 20 is reduced and the coil bobbin 8 and the bottom surface portion 9b are tightly attached, a concave portion may be formed on the abutting surface of the bottom surface portion 9b instead of a convex portion, or both a convex portion and a concave portion may be formed.

[0026] As shown in FIG. 8 , the protruding portion 9 c is cap-shaped with a protruding inclined surface that reduces in diameter on the magnetic circuit 2 side. The shape of the protruding portion 9 c is not limited to a cap-shaped shape with an inclined surface, and various shapes such as a cone, a pyramid, or a stepped shape are possible. The protruding portion 9 c has a small-area pressed portion 9 d at its upper portion that is parallel to the surface of the vibration member 20. As shown in FIG. 10 , when the pressed portion 9 d is pressed from the magnetic circuit 2 side toward the vibration member 20 by a pressing jig 40, the engaging portion 9 e of the engaging member 9 can be elastically deformed and the engaging portion 9 e of the engaging member 9 can be pressed against the vibration surface portion 23 of the vibration member 20, thereby engaging the engaged portion 21 provided on the vibration member 20 with the engaging portion 9 e of the engaging member 9. The pressed portion 9d does not necessarily have to be provided on the top of the protruding portion 9c, but may be provided on any of the outer peripheral wall portion 9a, bottom surface portion 9b, or protruding portion 9c of the engaging member 9, as long as it is provided in a position that can be pressed when the pressing jig 40 is inserted through the insertion portion 2a provided in the magnetic circuit 2. The pressed portion 9d does not need to be limited to a small flat portion as shown in the figure, and it is sufficient as long as the engaging member 9 is elastically deformed when pressed, and the engaged portion 21 provided on the vibrating member 20 can be engaged with the engaging portion 9e.

[0027] (5) Damper The voice coil 3 is supported on the holding member 11 by a damper 7. The damper 7 is, for example, a ring-shaped member, the outer periphery of which is fixed to the holding member 11, and the inner periphery of which is fixed to the outer periphery of the coil bobbin 8. The damper 7 can be made of a resin material or a metal material. When the damper 7 is made of a resin material, thermoplastic polyurethane elastomer (TPU) is suitable, but is not limited to this. The means for fixing the damper 7 to the coil bobbin 8 (voice coil 3) or the holding member 11 may be adhesive, heat welding, or other means.

[0028] (6) Vibration member As shown in Fig. 3, the vibrating member 20 of this embodiment is provided with a fixing part 33 for fixing the vibrating member 20 to the vehicle side. The vibrating member 20 is fixed to the vehicle side with a screw or a clip by utilizing a cutout provided in this fixing part 33. The fixing part 33 is not limited to this shape, and the number of fixing parts can be increased or decreased as needed. It is also possible to fix the vibrating member 20 with a screw or the like without providing the fixing part 33.

[0029] As shown in Fig. 6, the vibrating member 20 has a vibrating surface portion 23 and a non-vibrating surface portion 24. The vibrating surface portion 23 is a thin portion provided on the vibrating member 20, and vibrates when an acoustic signal is reproduced. The vibrating surface portion 23 in the first embodiment has an elongated track shape (an elliptical shape with two straight sides in the length direction and semicircular ends) that follows the outer shape of the vibrating member 20.

[0030] The non-vibration surface portion 24 is a thicker portion than the vibrating surface portion 23 that is provided on the periphery of the vibrating member 20 so as to surround the vibrating surface portion 23, and does not vibrate even when an acoustic signal is reproduced. However, since the non-vibration surface portion 24 is provided as part of the vibrating member 20 together with the vibrating surface portion 23, when the vibrating surface portion 23 vibrates when an acoustic signal is reproduced, the vibrations can be transmitted to the non-vibration surface portion 24. In the present invention, the non-vibration surface portion 24 means a portion that vibrates less than the vibrating surface portion 23 when an acoustic signal is reproduced, and does not substantially affect the reproduction characteristics of the acoustic signal.

[0031] The vibrating member 20 has a partitioning portion 25 that separates the vibrating surface portion 23 from the non-vibrating surface portion 24 and suppresses vibration transmission from the vibrating surface portion 23 to the non-vibrating surface portion 24 during acoustic signal reproduction. In the first embodiment, the partitioning portion 25 is formed in a rib shape that protrudes further toward the opening (upward) of the vibrating member 20 than the non-vibrating surface portion 24. The partitioning portion 25 does not necessarily have to be formed around the entire periphery of the vibrating surface portion 23, but from the viewpoint of stabilizing characteristics, it is more preferable to form the partitioning portion 25 around the entire periphery of the vibrating surface portion 23. In this embodiment, the partitioning portion 25 is provided around the entire periphery of the track-shaped vibrating surface portion 23, and among them, low partitioning portions 25 are provided in the arc-shaped portions at both ends of the vibrating surface portion 23 in the longitudinal direction, as shown in the cross-sectional view of FIG. 5. Furthermore, as shown in FIG. 6, rib-shaped partitioning portions 25 that protrude to a height several times the thickness of the non-vibrating surface portion 24 are provided on two sides along the longitudinal direction of the vibrating surface portion 23. As shown in Figures 3, 9 and 10, the retaining member 11 is fitted and attached inside the tall, rib-shaped partition section 25 provided on two longitudinal sides, and in order to improve the ease of fitting, the surface of the partition section 25 on the vibration surface section 23 side is an inclined surface whose upper part widens toward the non-vibration surface section 24 side.

[0032] As shown in FIGS. 3 to 6 , the vibration member 20 is provided with a positioning portion 26 for accurately positioning the holding member 11 on the vibration member 20. The positioning portion 26 is a rectangular cylindrical member that is open at the top and is provided on the non-vibration surface portion 24. The inner wall surface of the cylindrical member of the positioning portion 26 is an inclined surface that widens upward. The positioning portions 26 are provided on the outer sides of the four corners of the vibration surface portion 23, i.e., on the ends of the tall rib-shaped partition portions 25 on two sides. The vibration member 20 is provided with locking holes 27 for fixing the holding member 11 to the vibration member 20. The locking holes 27 are provided in the tall rib-shaped partition portions 25 horizontally along the surface of the vibration member 20. In this embodiment, two tall partition portions 25 are provided linearly on either side of the vibration surface portion 23, so that each partition portion 25 has two locking holes 27 along its longitudinal direction.

[0033] As shown in Fig. 8, the holding member 11 is provided with a terminal fixing portion 30 for connecting the lead wire 29 of the voice coil 3 to an external audio device. A connection terminal 31 can be fixed horizontally to the terminal fixing portion 30. The connection terminal 31 can be fixed by press-fitting, bonding, welding, or other suitable method. The lead wire 29 of the voice coil 3 is connected to each of the two metal connection terminals 31 on the terminal fixing portion 30.

[0034] As shown in Figures 5 and 6, a vibration-damping portion 32 can be formed on the vibrating surface portion 23 of the vibrating member 20. By forming a plurality of vibration-damping portions 32 and varying the shape or size of the vibration-damping portions 32 between the central portion and the peripheral portion of the vibrating surface portion 23, it is possible to control the resonance of the vibrating surface portion 23. By providing a tall vibration-damping portion 32 at the center line portion in the longitudinal direction of the vibrating surface portion 23, the rigidity in the longitudinal direction can be further increased. In this embodiment, the vibration-damping portions 32 are formed in a hexagonal shape, but these hexagonal vibration-damping portions 32 and the voice coil mounting portion 20a may also be connected by linear rib portions.

[0035] [1-2. Operation of the embodiment] The exciter 1 of this embodiment is used by being fixed to a vibrating member 20, which is an interior or exterior material of a vehicle. A cap-shaped engaging member 9 is attached to the lower end of the coil bobbin 8 of the voice coil 3 that constitutes the exciter 1. The conical protrusion 9c is inserted inside the coil bobbin 8, and the lower end of the coil bobbin 8 is inserted inside an outer peripheral wall portion 9a provided on the outer periphery of the protrusion 9c, and the two are bonded together. More specifically, the outer peripheral surface of the coil bobbin 8 is bonded to the inner peripheral surface of the outer peripheral wall portion 9a, and the coil bobbin 8 is fixed to the engaging member 9. In this state, a locking claw-shaped engaging portion 9e extends outside the outer peripheral wall portion 9a of the engaging member 9, protruding beyond the outer peripheral surface of the coil bobbin 8.

[0036] In this state, the exciter 1 is fixed to the vibrating member 20. This fixing operation is performed by inserting the legs 14 provided at the four corners of the holding member 11 into the positioning portions 26 of the vibrating member 20, thereby positioning the vibrating member 20 and the holding member 11. The positioned vibrating member 20 and the holding member 11 are fixed by engaging the locking protrusions 15 of the holding member 11 with the locking holes 27 of the vibrating member 20.

[0037] When the holding member 11 is fixed to the vibrating member 20, the voice coil 3 and coil bobbin 8 of the exciter 1 are attached to the magnetic circuit 2 via the damper 7, so that the pressing force when attaching the holding member 11 to the vibrating member 20 is not directly applied, and the engaging member 9 provided at the lower end of the coil bobbin 8 cannot be securely fixed to the vibrating member 20. In other words, the bottom surface 9b of the engaging member 9 does not come into contact with the vibrating surface 23 of the vibrating member 20, but rather comes into contact with the upper part of the voice coil mounting part 20a, or is lightly fitted inside the upper part of the voice coil mounting part 20a.

[0038] In this state, a pressing jig 40 is inserted through the insertion portion 2a provided on the magnetic circuit 2. Then, when the tip of the pressing jig 40 presses the pressed portion 9d, which is the top of the protruding portion 9c of the engaging member 9, an upward force is applied to the engaging member 9, and the engaging member 9 is pressed into the voice coil mounting portion 20a together with the coil bobbin 8 attached thereto. As a result, the engaging portion 9e, which is shaped like a locking claw and extends from the outer periphery of the engaging member 9, descends while being pressed inward along the inner surface of the voice coil mounting portion 20a. When it reaches the engaged portion 21, which is shaped like an engaging hole and provided in the voice coil mounting portion 20a, it expands due to its elasticity and engages with the engaged portion 21. As a result, the lower end of the coil bobbin 8 is engaged within the voice coil mounting portion 20a, and the voice coil 3 and the vibrating member 20 are fixed. In this state, a pressing force is applied between the engaging member 9 and the vibrating member 20, and they are held in close contact with each other.

[0039] Furthermore, in this embodiment, a cushioning material such as an elastomer is provided on the surface of the engaging member 9, so that when the engaging member 9 and the vibrating member 20 are fixed, the cushioning material on the bottom surface 9b of the engaging member 9 elastically deforms and presses, and the resulting stress causes the bottom surface 9b of the engaging member and the surface of the vibrating member 20 to adhere tightly to each other.

[0040] [1-3. Effects of the embodiment] (1) In this embodiment, the voice coil 3 is attached to the holding member 11 and is integrated with the magnetic circuit 2 as a unit. Therefore, compared to the conventional configuration in which a joint member and a voice coil are fastened with screws, the labor and time required to fasten the exciter 1 to the vibrating member 20 can be saved, and the installation work of the exciter 1 is easy. Furthermore, the fixing structure can be simplified, the number of assembly steps can be reduced, and the cost required to install the exciter 1 can be reduced. Furthermore, the engaging member 9 and the vibrating member 20 can be reliably fixed together with a pressing force applied to each other. In this case, the engaging member 9 and the vibrating member 20 have high adhesion, so that the vibration of the voice coil 3 can be reliably transmitted to the vibrating member 20 via the engaging member 9.

[0041] (2) In this embodiment, by using the pressing jig 40 when adhesively fixing the exciter 1, a force can be applied directly to the pressed portion 9d of the engaging member 9. As a result, the engaging member 9 is strongly pressed against the vibrating member 20 via the adhesive member 10. In this way, in this embodiment, the voice coil 3 can be reliably fixed to the vibrating member 20 via the engaging member 9, improving the vibration efficiency of the exciter 1 and enabling the reproduction of acoustic signals up to high frequencies. Furthermore, because the pressing jig 40 presses the pressed portion 9d of the engaging member 9 when fixing the exciter 1, deformation, damage, and breakage of the voice coil 3 (bobbin or wire) due to bottoming can be prevented. In this way, preventing bottoming improves the reliability of the exciter 1 when adhesively fixing it, improving the durability of the product.

[0042] (3) Since the engaging member 9 can be pushed through the insertion portion 2a formed in the center of the magnetic circuit 2 without any intermediate object for fixing the exciter 1 and the vibrating member 20 between them, the voice coil 3 and the vibrating member 20 can be firmly fixed together without applying excessive force to them. As a result, it is possible to reliably fix the end of the voice coil 3 and the surface of the vibrating member 20 together, which are surrounded by the magnetic circuit 2 and the holding member 11 and therefore difficult to apply force to.

[0043] (4) Because the upper part of the protruding portion 9c of the engaging member 9 protrudes toward the magnetic circuit 2, it is easy to press the pressed portion 9d and force is easily applied to the bottom surface portion 9b when adhesively fixing the exciter 1. As a result, the engaging member 9 can be pressed downward more firmly when adhesively fixing, and the voice coil 3 can be more reliably fixed to the vibrating member 20. In addition, by tapering the engaging member 9, it is possible to reliably match the surfaces to the shape of the mating part and to shorten the length of the pressing jig 40.

[0044] (5) By fitting the engaging portion 9e provided on the holding member 11 into the engaged portion 21 of the vibration member 20, the magnetic circuit 2 can be easily fixed to the holding member 11 without using any tools or adhesives.

[0045] (6) Since a buffer material is formed on the surface of the engaging member 9, it is possible to prevent buffer noise and buzzing noise between the voice coil 3 and the engaging member 9.

[0046] (7) When the exciter 1 is fixed, the force required for fixing is received by the engaging member 9 and can be transmitted directly to the vibrating member 20. Therefore, it is possible to prevent an overload on the damper 7 during fixing.

[0047] (8) Since a convex surface portion 22 is formed on the bottom surface portion 9b of the engaging member 9 and / or on the inside or outside of the voice coil mounting portion 20a of the vibrating member 20, the contact area between the voice coil 3 and the vibrating surface portion 23 is minimized, thereby bringing the voice coil 3 into close contact with the bottom surface portion 9b and ensuring that the vibration of the voice coil 3 is transmitted to the vibrating member 20.

[0048] [2. Second Embodiment] In the second embodiment, the engaging member 9 of the first embodiment has a different configuration. In the second embodiment, as shown in Fig. 11, the protruding portion 9c of the engaging member 9 is configured in a rib shape. As shown in Fig. 12, this rib-shaped protruding portion 9c extends from the bottom surface portion 9b of the engaging member 9 to near the bottom of the magnetic circuit 2, and the upper end of this rib shape, i.e., the end on the magnetic circuit 2 side, forms the pressed portion 9d.

[0049] In the second embodiment as well, by inserting a pressing jig 40 through the insertion portion 2a provided in the magnetic circuit 2 and pressing the pressed portion 9d at the top of the protrusion 9c with its tip, the engaging member 9 is pressed into the cylindrical voice coil mounting portion 20a, the engaging portion 9e engages with the engaged portion 21, and the voice coil 3 is fixed to the vibrating member 20 via the engaging member 9. The rib shape provided on the engaging member 9 may be any shape, such as radial or cross.

[0050] In the second embodiment having such a configuration, the voice coil 3 and the vibrating member 20 can be fixed by pressing the vibrating member 20 without pressing the magnetic circuit 2. This prevents deformation, damage, and disconnection caused by bottoming of the voice coil 3, improves reliability when adhesively fixing the exciter 1, and improves product durability. In the second embodiment, the fixing structure of the exciter 1 can also be simplified, reducing the number of assembly steps and reducing the cost of installing the exciter 1. Furthermore, since it is possible to press the rib-shaped upper pressed portion 9d directly with the lower part of the magnetic circuit 2 without using a separate pressing jig 40, when attaching the holding member 11 to the vibrating member 20, the number of parts required is reduced and assembly is simplified.

[0051] 3. Other Embodiments Although several embodiments of the present invention have been described above, they are not intended to limit the scope of the invention. As listed below, the invention can be embodied in various other forms without departing from the spirit of the invention, and various omissions, substitutions, and modifications can be made. These embodiments, combinations thereof, and further modifications thereof are included within the scope and spirit of the invention, as well as within the scope of the inventions described in the claims and their equivalents. The following are examples of embodiments encompassed by the present invention.

[0052] (1) The vibrating member 20 is not limited to that for a vehicle, but may be any member that is in a space where sound is heard, such as a wall of a building, furniture such as a chair, etc., and to which the exciter 1 can be fixed.

[0053] (2) The engaging member 9 does not need to be a separate member from the voice coil 3, and may be molded integrally with the voice coil 3 by insert molding or the like. Also, the voice coil 3 does not necessarily have to be configured together with the coil bobbin 8, and may be configured as a standalone voice coil.

[0054] (3) The outer peripheral wall portion 9a of the engaging member 9 does not have to be cylindrical with a wall surface around the entire circumference, but may be a plurality of arc-shaped portions arranged at predetermined intervals. The bottom surface portion 9b does not necessarily have to be provided around the entire circumference at the bottom of the outer peripheral wall portion 9a. As long as the pressed portion 9d has a shape that allows the pressing force of the pressing jig 40 to be transmitted, the shapes of the outer peripheral wall portion 9a and the bottom surface portion 9b are not important.

[0055] (4) As long as the pressed portion 9d is provided on the engaging member 9, its position, shape, and number are not important.

[0056] (5) The magnetic circuit 2 and the holding member 11 can be fixed together by insert molding, press-fitting, bonding, or the like. The engaging member 9 may be bonded to the vibrating member 20. Double-sided adhesive tape, adhesive, or the like can also be used as the bonding member for bonding the engaging member 9 and the vibrating member 20 together.

[0057] (6) In each of the above-described embodiments, the pressed portion 9d is pressed by a separately prepared pressing jig 40 to fix the engaging member 9 to the vibration member 20. However, instead of the pressing jig 40, a pressing portion such as a protrusion that abuts against the pressed portion 9d of the engaging member 9 may be provided on a part of the magnetic circuit 2 or a part of the holding member 11 of the magnetic circuit 2, and the engaging member 9 may be pressed by the pressing portion. [Explanation of symbols]

[0058] 1...Exciter 2...Magnetic circuit 2a...insertion section 3...Voice coil 4. York 5...Magnet 6...Pole piece 7...Damper 8...Coil bobbin 9...Engagement member 9a...Outer peripheral wall 9b…Bottom part 9c...Protruding part 9d...Pressure receiving part 9e…Engagement part 11...Holding member 12...Magnetic circuit mounting part 20...Vibration member 20a...Voice coil mounting part 21...Engaged portion 22...Convex part 23…Vibration surface section 24…Non-vibration surface part 25...Partition 26... Positioning part 27...Latching hole 40...Pressing jig

Claims

1. a magnetic circuit fixed to a holding member; A voice coil and an engaging member attached to the voice coil; Equipped with The engaging member is an engaging portion that engages with an engaged portion provided on the vibration member; a pressed portion that engages the engaged portion with the engaging portion; and an insertion portion of a pressing jig capable of pressing the pressed portion; The insertion portion is a through hole that penetrates the center of the magnetic circuit.

2. A magnetic circuit fixed to a holding member; A voice coil and an engaging member attached to the voice coil; Equipped with The engaging member is an engaging portion that engages with an engaged portion provided on the vibration member; a pressed portion that engages the engaged portion with the engaging portion; and An exciter in which a pressing portion that presses the pressed portion is provided on the magnetic circuit or a holding member of the magnetic circuit.

3. A magnetic circuit fixed to a holding member; A voice coil and an engaging member attached to the voice coil; Equipped with The engaging member is an engaging portion that engages with an engaged portion provided on the vibration member; a pressed portion that engages the engaged portion with the engaging portion; and the engaging member has an outer peripheral wall portion on which the voice coil is mounted, a bottom surface portion that contacts the vibrating member, and a protrusion portion that protrudes toward the magnetic circuit, An exciter in which a pressed portion is provided on the protruding portion.

4. 4. The exciter according to claim 3, wherein the engaging member has an engaging portion formed on the outer peripheral wall portion.

5. 5. The exciter according to claim 1, wherein the engaging member has a surface formed with a buffer material.

6. 6. An exciter according to claim 1, wherein said voice coil is supported by said holding member by a damper.

7. A speaker comprising a vibrating member having the engaged portion, and an exciter according to any one of claims 1 to 6 attached to the vibrating member.

8. 8. The speaker according to claim 7, wherein the engaging portion is formed of a locking claw or a locking hole, and the engaged portion is formed of a locking hole or a locking claw corresponding to the engaging portion.

9. 9. The speaker according to claim 7, wherein the engaged portion is formed by a voice coil mounting portion protruding from the vibrating member, and the engaging member is attached to the voice coil mounting portion.

10. The engaging member has a bottom surface portion that abuts against the vibration member, 10. The speaker according to claim 7, wherein a concave or convex surface is formed on the bottom surface of the engaging member and / or on the vibrating member.

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