Speaker device and method for assembling panel-type speaker using speaker device

Abstract

To provide a speaker device capable of strengthening the connection with a diaphragm.SOLUTION: A speaker device is attached to a diaphragm and outputs sound waves from the diaphragm. The speaker device includes: an oscillator portion having a magnetic circuit and a voice coil; and an exciter that includes a holding portion that holds the oscillator portion and is fixed to the diaphragm, a transmission member that is disposed between the oscillator portion and the diaphragm and transmits vibrations from the oscillator portion to the diaphragm; and an adhesive portion that bonds the transmission member and the diaphragm by applying pressure. When the speaker device is viewed from the oscillator portion side along the arrangement direction of the oscillator portion and the transmission member, a part of the transmission member is exposed as a pressing portion that can be pressed from the oscillator portion side.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a speaker device and a method for assembling a panel-type speaker using the speaker device. [Background technology]

[0002] Conventionally, panel-type speakers capable of emitting sound waves by vibrating a panel such as a display as a diaphragm have a structure in which an exciter or the like is attached to the diaphragm (for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-191323 A [Patent Document 2] JP 2005-184393 A Summary of the Invention [Problem to be solved by the invention]

[0004] When attaching an exciter to a diaphragm, it is necessary to attach a transmission member included in the exciter to the diaphragm. However, since a typical exciter has a structure including a spring, when attaching the transmission member so as to press it against the diaphragm, it is not possible to apply a load greater than the repulsive force of the spring, making it difficult to firmly connect the exciter to the diaphragm.

[0005] The technology of the present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a speaker device that can strengthen the connection with the diaphragm. [Means for solving the problem]

[0006] In order to solve the above problems, the technology of the present invention employs the following configuration. A speaker device according to one aspect of the technology of the present invention is a speaker device that is attached to a diaphragm and outputs sound waves from the diaphragm. The speaker device includes an oscillator having a magnetic circuit and a voice coil, a holding part that holds the oscillator and is fixed to the diaphragm, an exciter that includes a transmission member that is disposed between the oscillator and the diaphragm and transmits vibrations from the oscillator to the diaphragm, and an adhesive part that bonds the transmission member and the diaphragm by applying pressure. When the speaker device is viewed from the oscillator side along the arrangement direction of the oscillator and the transmission member, a part of the transmission member is exposed as a pressing part that can be pressed from the oscillator side. Effect of the Invention

[0007] According to the present invention, it is possible to provide a speaker device capable of strengthening the connection with the diaphragm because the transmission member can be directly pressed. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view of an exciter according to an embodiment, as viewed from the rear surface side. [Diagram 2] FIG. 2 is a cross-sectional side view of the panel type speaker according to the embodiment. [Diagram 3] FIG. 3 is a plan view of the exciter according to the first modified example of the embodiment, as viewed from the rear surface side. [Figure 4] FIG. 4 is a plan view of the exciter according to the second modification of the embodiment, as viewed from the rear surface side. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that each configuration and their combination in the present embodiment is merely an example, and addition, omission, substitution, and other modifications of the configuration are possible as appropriate within the scope of the present invention. Furthermore, the present invention is not limited to the embodiment, but is limited only by the claims.

[0010] Here, a panel-type speaker that vibrates a panel with an exciter and outputs sound from the panel will be described. In the following embodiment, an example will be described in which an exciter vibrates a panel to output (emit) sound waves from the panel, thereby functioning as a panel-type speaker.

[0011] [Overall structure] Fig. 1 is a plan view of a panel type speaker 10 according to an embodiment as viewed from the back, and Fig. 2 is a cross-sectional view of the panel type speaker 10 as viewed from the side. The panel type speaker 10 in Fig. 2 includes a panel 100 (an example of a "diaphragm" in the present invention) and an exciter 200. In this embodiment, the exciter 200 with double-sided tape 301 attached thereto is referred to as a speaker device 1.

[0012] The panel 100 is, for example, a panel member having a generally flat plate shape. In the panel 100, the surface on which the speaker device 1 (exciter 200) is attached is called the back surface, and the opposite surface is called the front surface. The speaker device 1 is attached to the panel 100 to output sound waves from the front surface of the panel 100. That is, the panel-type speaker 10 is configured to emit sound waves into space from the front surface of the panel 100. The exciter 200 includes a main body 210 including an oscillator 2 having a magnet 211 and a voice coil 212, a holding part 220, and a transmission member 230. For convenience, the direction in which the oscillator 2 and the transmission member 230 are arranged is called the Z direction, and the direction toward the front surface side of the panel 100 in the Z direction is called the front direction, and the direction toward the back surface side is called the back direction. The X direction is the direction that coincides with the left-right direction when the panel 100 is viewed from the front surface side, and the Y direction is the direction that coincides with the up-down direction when the panel 100 is viewed from the front surface side. Note that each direction merely indicates the relative positional relationship of each element in this embodiment.

[0013] The panel 100 is an aluminum member or the like used for the housing of a rear seat entertainment product for an automobile. In this embodiment, the panel 100 is formed in a generally flat plate shape, and the panel 100 has a plurality of support columns 110 protruding from the rear surface of the panel 100 for fixing the exciter 200. In this embodiment, four support columns 110 are formed. A screw hole is formed in the support column 110, and a screw 302 described later can be screwed into the female thread of the screw hole. On the rear surface of the panel 100, the support columns 110 are arranged so that the exciter 200 can be positioned. More specifically, the four support columns 110 are formed so as to correspond to the four corners of the holding portion 220 of the exciter 200 formed in a generally square shape. This defines the position on the rear surface of the panel 100 where the exciter 200 is fixed. The support column 110 in this embodiment is a quadrangular column, but may have other external shapes, for example, a frustum shape or a cylindrical shape. However, the shape of the panel 100 is not particularly limited. The panel 100 may be a non-flat member such as a curved panel or a curved display, as long as the exciter 200 can be fixed to the back side. The material of the panel 100 is also not particularly limited, and may be, for example, a resin, a metal, or the like. The panel 100 may be, for example, a display panel. The display panel is a display element such as a liquid crystal display or an organic EL (Electro-Luminescence) display, and displays and outputs an image when a video signal is input. The surface of the display panel coincides with the display surface of the image, and is configured to emit sound waves from the surface into space.

[0014] The exciter 200 is a vibration device for vibrating the panel 100. In this embodiment, the exciter 200 is formed as an electrodynamic exciter. 00 includes a main body 210, a holding part 220, and a transmission member 230. The electrodynamic exciter in this embodiment has a moving coil placed in a magnetic field created by a permanent magnet or the like, and can vibrate a diaphragm by passing a current through the moving coil.

[0015] The main body 210 has a magnet 211, a voice coil 212, and a spring 213. In the main body 210, the voice coil 212 and the spring 213 are arranged in front of the magnet 211, and the spring 213 is arranged inside the voice coil 212 formed in a cylindrical shape. In the main body 210, a magnetic circuit is formed by the magnet 211. For convenience, the magnet 211 and the voice coil 212 are collectively referred to as the oscillator 2. The magnet 211 is formed of a permanent magnet. The material used for the magnet 211 may be alnico, ferrite, neodymium, or the like. The magnet 211 is not limited to a permanent magnet, and may be an electromagnet or the like. The main body 210 including the magnet 211 is fixed to a holding portion 220 described later, and the magnet 211 is thereby fixed to the holding portion 220.

[0016] The voice coil 212 is a coil formed in a cylindrical shape and is arranged along the Z direction. The voice coil 212 has a central axis A1 along the Z direction. A terminal (not shown) is connected to the voice coil 212, and the terminal is connected to a control device or the like, so that a current can be passed through the voice coil 212. The front end face of the voice coil 212 is fixed to the transmission member 230. The back end face of the voice coil 212 has a gap between it and the magnet 211, and the voice coil 212 is formed so as to be vibrable in the Z direction. When a current is passed through the voice coil 212, a Lorentz force is generated by the magnetic field formed by the magnet 211 and the current flowing through the voice coil 212, and the voice coil 212 vibrates in the Z direction.

[0017] The spring 213 is a member for holding the voice coil 212 and the transmission member 230 in a predetermined position in the exciter 200, and for damping the vibration of the transmission member 230 generated by the magnet 211 and the voice coil 212. The spring 213 according to this embodiment is formed as a leaf spring. The spring 213 is interposed between the magnet 211 and the transmission member 230. One end of the spring 213 is connected to the magnet 211, and the other end is connected to the transmission member 230. The shape and material of the spring 213 are not particularly limited as long as it can position the voice coil 212 and the transmission member 230 in the exciter 200 and damp the vibration of the transmission member 230.

[0018] The holding portion 220 is a member formed in a generally square flat plate shape. As shown in FIG. 1, when the holding portion 220 is viewed in a plan view on the XY plane, the holding portion 220 is formed so that the main body portion 210 can be fitted in the center. The main body portion 210 is fixed to the holding portion 220 by fitting using a claw or by fixing with an adhesive. In this way, the oscillation portion 2 is held by the holding portion 220. The holding portion 220 is formed with a fixing hole 221 penetrating the holding portion 220 in the Z direction. The fixing hole 221 is formed as a through hole through which a screw or the like can be inserted. The fixing hole 221 is formed so that when the screw 302 is screwed into the female thread formed in the support column 110, the screw 302 is inserted into the fixing hole 221, thereby fixing and positioning the exciter 200 to the panel 100. In this way, the holding portion 220 is fixed to the panel 100. 1, in this embodiment, the fixing holes 221 are formed at four locations corresponding to the four corners of the holding portion 220. In the XY plane, the fixing holes 221 are arranged so as to be symmetrical with respect to the central axis A1 of the voice coil 212. However, the material of the holding portion 220 is not particularly limited, and may be, for example, a resin, a metal, a ceramic, or the like. In addition, the shape of the holding portion 220 is not particularly limited, and may be a disk shape or another shape.

[0019] The transmission member 230 is a member formed in a rectangular plate shape. The transmission member 230 is disposed between the oscillation unit 2 and the panel 100, and is disposed so as to transmit the vibration generated by the oscillation unit 2 to the panel 100. In this embodiment, the transmission member 230 is formed in a rectangular shape with the X direction being the short side direction and the Y direction being the long side direction. In this embodiment, a total of two pressing parts 231 are formed on the end side of the transmission member 230 from the support column 110 in the long side direction. The pressing parts 231 are formed so as to protrude outward from the holding part 220 when the exciter 200 is viewed from the oscillation unit 2 side along the arrangement direction (Z direction) of the oscillation unit 2 and the transmission member 230. In other words, the pressing parts 231 are parts of the transmission member 230 exposed from the oscillation unit 2 side so as to be able to be pressed. The pressing parts 231 are formed in positions symmetrical to each other across the central axis A1 of the voice coil 212 in the XY plane. Furthermore, the material of the transmission member 230 is not particularly limited, but may be, for example, a resin, a metal, or a ceramic.

[0020] A double-sided tape 301 (an example of the "adhesive portion" in the present invention) is attached to the front side of the transmission member 230, and the panel 100 and the transmission member 230 are connected via the double-sided tape 301. A voice coil 212 and a spring 213 are connected to the rear side of the transmission member 230. By pressing the pressing portion 231 in the Z direction, the double-sided tape 301 is pressed, and the panel 100 and the transmission member 230 can be bonded together. In addition, the method of connecting the transmission member 230 and the panel 100 is not limited to the method using the double-sided tape 301, and may be, for example, connected by adhesive, welding, brazing, or the like, or the transmission member 230 and the panel 100 may be integrally formed. In addition, in this embodiment, a mode in which the pressing portion 231 is pressed at two places using two push pins 303 is shown, but the method of pressing the pressing portion 231 is not limited to this, and may be pressed by, for example, the operator's fingers. Furthermore, by forming the transmission member 230 in a shape different from that of this embodiment, the number of pressing portions 231 formed may be increased or decreased.

[0021] The transmission member 230 vibrates in association with the vibration of the voice coil 212. More specifically, as described above, when a current flows through the voice coil 212, the voice coil 212 vibrates so as to move in the Z direction. Also, since the voice coil 212 is connected to the transmission member 230, the voice coil 212 vibrates in association with the transmission member 230. In other words, since the panel 100 is connected to the transmission member 230 with the double-sided tape 301, it is possible to vibrate the panel 100 so as to output sound waves from the surface into space.

[0022] [assembly] Next, a method for assembling the panel type speaker 10 according to this embodiment will be described. In this embodiment, the panel type speaker 10 is assembled by installing the exciter 200 on the back surface of the panel 100. Below, the method for assembling the panel type speaker 10 will be described with reference to the embodiment. However, the method for assembling the panel type speaker 10 according to this embodiment is not limited to the following method.

[0023] In step S0, speaker device 1 is prepared by attaching double-sided tape 301 to the front side of transmission member 230. In step S1, exciter 200 is moved in the Z direction to install exciter 200 at a fixed position of exciter 200 defined by four support columns 110. When aligning, exciter 200 is installed so that fixing hole 221 communicates with female threads formed in support columns 110.

[0024] In step S2, the pressing portion 231 is pressed in the Z direction from the oscillator 2 side by the push pin 303. This allows the double-sided tape 301 to be pressure-bonded to the panel 100 and the transmission member 230. This allows the exciter 200 to be attached to the panel 100.

[0025] In step S3, the exciter 200 and the panel 100 are fixed together using the screw 302. In step S1, the fixing hole 221 and the female screw formed in the support column 110 are connected to each other. In step S3, the screw 302 can be inserted through the fixing hole 221 and screwed into the female thread formed in the support pole 110 to install the exciter 200 on the panel 100. This allows the exciter 200 and the panel 100 to be fixed together, and the panel type speaker 10 is completed.

[0026] [Effects] As described above, the speaker device 1 according to this embodiment includes the oscillator 2 having the magnet 211 and the voice coil 212, the holding portion 220 that holds the oscillator 2 and is fixed to the panel 100, the exciter 200 that includes the transmission member 230 that is disposed between the oscillator 2 and the panel 100 and transmits vibration from the oscillator 2 to the panel 100, and the double-sided tape 301 that bonds the transmission member 230 to the panel 100 by applying pressure. When the speaker device 1 is viewed from the oscillator 2 side along the arrangement direction of the oscillator 2 and the transmission member 230, a part of the transmission member 230 is exposed as the pressing portion 231 that can be pressed from the oscillator 2 side.

[0027] According to the speaker device 1 configured as above and the panel type speaker 10 using the speaker device 1, when the transmission member 230 of the exciter 200 is to be bonded to the rear surface of the panel 100 in the process of step S1 described above, the pressure for pressing the double-sided tape 301 is transmitted to the transmission member 230 via the spring 213. If the pressing portion 231 does not exist, the pressure applied to the double-sided tape 301 that bonds the transmission member 230 to the rear surface of the panel 100 depends on the repulsive force of the spring 213, and the double-sided tape 301 cannot be sufficiently pressed. Here, by providing the pressing portion 231 to the transmission member 230, it is possible to perform the process of step S3 in which the transmission member 230 is directly pressed with a pressure larger than the repulsive force of the spring 213 without going through the spring 213. This makes it possible to strengthen the adhesion between panel 100 and double-sided tape 301, and between transmission member 230 and double-sided tape 301, and therefore makes it possible to strengthen the connection between panel 100 and transmission member 230.

[0028] [Variation 1] Fig. 3 is a plan view of exciter 200A according to modified example 1 of the embodiment, as viewed from the back side. Hereinafter, exciter 200A according to modified example 1 of the embodiment will be described with reference to Fig. 3. Note that in the description of this modified example, differences from exciter 200 described with reference to Figs. 1 and 2 will be mainly described. Also, among the members constituting exciter 200A, members common to exciter 200 will be given the same reference numerals and detailed description thereof will be omitted.

[0029] Exciter 200A includes holding portion 220A. Through hole 222 and notch 223 are formed in holding portion 220A. Here, for convenience, through hole 222 and notch 223 are collectively referred to as a penetration portion. Through hole 222 is formed in a circular shape, and is a hole penetrating holding portion 220A. Also, notch 223 is a roughly U-shaped notch disposed at one end of holding portion 220A in the Y direction. In other words, the penetration portion penetrates a part of exciter 200A, and through hole 222 and notch 223 are disposed at positions symmetrical to each other across central axis A1 of voice coil 212. In addition, in the XY plane, the positions of the through hole 222 and the pressing portion 231A, and the positions of the notch 223 and the pressing portion 231A are aligned, and when the exciter 200A is viewed from the oscillation portion 2 side along the arrangement direction (Z direction) of the oscillation portion 2 and the transmission member 230A, the pressing portion 231A is exposed through the through hole 222 and the notch 223. That is, the pressing portion 231A is a part of the transmission member 230A exposed so as to be pressable from the oscillation portion 2 side. As a result, the pressing portion 231A is formed so as to be pressable by inserting the push pin 303 through the through hole 222 and the notch 223. However, the shapes of the through hole 222 and the notch 223 are not limited to this, and may be, for example, a rectangular hole or a notch. In addition, the positions and the number of the through hole 222 and the notch 223 may be changed according to the change in the position of the pressing portion 231A or the increase or decrease in the number.

[0030] [Variation 2] Fig. 4 is a plan view of an exciter 200B according to the second modification of the embodiment, as viewed from the rear side. Hereinafter, the exciter 200B according to the second modification of the embodiment will be described with reference to Fig. 4. Note that in the description of this modification, differences from the exciter 200 described with reference to Figs. 1 and 2 will be mainly described. Also, among the members constituting the exciter 200B, members common to the exciter 200 will be given the same reference numerals, and detailed description thereof will be omitted.

[0031] Exciter 200B includes a main body 210B. Main body 210B includes a magnet 211B. Magnet 211B has a through hole 215 (an example of a "through portion" in the present invention) centered on central axis A1 of voice coil 212 (not shown) and formed along central axis A1. Through hole 215 is formed in a circular shape and is a hole that penetrates magnet 211B. In other words, the through portion penetrates a part of exciter 200B.

[0032] The transmission member 230B is a member formed in a rectangular flat plate shape. In this modification, one pressing portion 231B is formed on the central axis of the voice coil 212 in the XY plane. In the XY plane, the position of the through hole 215 and the position of the pressing portion 231B coincide with each other, and when the exciter 200B is viewed from the oscillation unit 2 side along the arrangement direction (Z direction) of the oscillation unit 2 and the transmission member 230B, the pressing portion 231B is exposed through the through hole 215. That is, the pressing portion 231B is a part of the transmission member 230B exposed so as to be pressable from the oscillation unit 2 side. Thereby, the pressing portion 231B is formed so as to be pressable by inserting the push pin 303 through the through hole 215. However, the shape of the through hole 215 is not limited to this, and may be, for example, a square hole. In addition, the position and number of the through holes 215 may be changed according to the change in the position of the pressing portion 231B or the increase or decrease in the number.

[0033] The above describes the embodiments of the present invention and modified examples of the embodiments of the present invention. However, each aspect disclosed in this specification can be combined with any other features disclosed in this specification. [Explanation of symbols]

[0034] 10: Panel type speaker 100: Panel 200: Exciter

Claims

1. A speaker device attached to a diaphragm and outputting sound waves from the diaphragm, an oscillator having a magnetic circuit and a voice coil; a holder that holds the oscillator and is fixed to the diaphragm; an exciter including a transmission member disposed between the oscillation unit and the diaphragm and configured to transmit vibration from the oscillation unit to the diaphragm; an adhesive portion that adheres the transmission member and the diaphragm by being pressurized; When the speaker device is viewed from the oscillator side along an arrangement direction of the oscillator and the transmission member, a part of the transmission member is exposed as a pressing portion that can be pressed from the oscillator side. Speaker device.

2. When the speaker device is viewed from the oscillator side along an arrangement direction of the oscillator and the transmission member, the pressing portion protrudes outward beyond the holding portion.

2. The speaker device according to claim 1.

3. a through-hole portion is formed in the exciter along an arrangement direction of the oscillation portion and the transmission member, the through-hole portion penetrating a part of the exciter, the pressing portion is exposed through the through-hole when the speaker device is viewed from the oscillator side along an arrangement direction of the oscillator and the transmission member.

2. The speaker device according to claim 1.

4. the voice coil is disposed such that a central axis of the voice coil is aligned along an arrangement direction of the oscillator and the transmission member, The pressing portions are formed at positions symmetrical to each other across the central axis of the voice coil. The speaker device according to claim 1 .

5. the voice coil is disposed such that a central axis of the voice coil is aligned along an arrangement direction of the oscillator and the transmission member, The pressing portion is formed on the central axis of the voice coil.

4. The speaker device according to claim 3.

6. A method for assembling a panel-type speaker, comprising the steps of: attaching a speaker device to a diaphragm and outputting sound waves from the diaphragm, the method comprising the steps of: preparing the speaker device by providing an adhesive portion on an exciter having an oscillation portion, a transmission member, and a holding portion that holds the oscillation portion and is fixed to the diaphragm; placing the exciter on the diaphragm; a step of pressing a part of the transmission member that is exposed as a pressing portion that can be pressed from the oscillation unit side when the speaker device is viewed from the oscillation unit side along an arrangement direction of the oscillation unit and the transmission member, and applying pressure to the adhesive portion, thereby adhering the exciter to the diaphragm; A method for assembling a panel type speaker comprising:

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