JP2024017030A - Speaker device and speaker device manufacturing method - Google Patents

Abstract

To suppress transmission of a vibration of a speaker unit to an external side while suppressing an increase of a manufacturing cost.SOLUTION: A speaker device 1 includes: a speaker unit 2 having a diaphragm 3; an attachment member 40 for attaching the speaker unit 2 to an object; and a plurality of belt-like or linear support members 30 for supporting the speaker unit 2 by extending in a direction to cross with a center axis O of the speaker unit 2 so as to connect the speaker unit 2 to the attachment member 40.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a speaker device and a method of manufacturing the speaker device.

2. Description of the Related Art Speaker devices (sound output devices) that suppress vibrations of a speaker unit from being transmitted to the outside are known. For example, Patent Document 1 discloses an audio output device in which a speaker unit and a mounting member are connected by a spring member.

International Publication No. 2017/022254

By the way, if the cost of the structure (for example, a spring member) for suppressing the vibration of the speaker unit from being transmitted to the outside increases, the manufacturing cost of the audio output device increases. Therefore, it is desired to suppress an increase in the cost of a structure for suppressing vibrations of the speaker unit from being transmitted to the outside.

In consideration of the above circumstances, one aspect of the present disclosure aims to suppress transmission of vibrations of a speaker unit to the outside while suppressing an increase in manufacturing costs.

A speaker device according to an aspect of the present disclosure includes a speaker unit having a sound emitting portion, a mounting member for attaching the speaker unit to an object, and a mounting member extending in a direction intersecting a central axis of the speaker unit. A plurality of band-shaped or linear support members are provided, which support the speaker unit by being connected to the mounting member.

A method for manufacturing a speaker device according to an aspect of the present disclosure is a method for manufacturing a speaker device including a speaker unit having a sound emitting portion and a mounting member for attaching the speaker unit to an object, the method comprising: a central axis of the speaker unit; a connecting step of connecting a plurality of belt-shaped or linear supporting members extending in a direction intersecting with the speaker unit and supporting the speaker unit to the speaker unit and the mounting member; A first connection surface to which the plurality of support members among the mounting members are connected, and a second connection surface to which the plurality of support members among the mounting members are connected, in a direction perpendicular to the first connection surface. The speaker unit and the mounting member are arranged on spacers at different positions, each of the plurality of support members is connected to the first connection surface and the second connection surface, and the spacer is removed.

FIG. 1 is a cross-sectional view of a speaker device according to an embodiment. FIG. 2 is a front view of the speaker device shown in FIG. 1. FIG. FIG. 7 is an explanatory diagram for explaining the effect of supporting the speaker unit by the support member. FIG. 2 is an explanatory diagram for explaining an example of a method for manufacturing a speaker device. FIG. 7 is an explanatory diagram for explaining another example of a method for manufacturing a speaker device. It is an explanatory view for explaining an example of the connection method of the support member concerning the 1st modification. It is an explanatory view for explaining an example of a support member concerning a 2nd modification. FIG. 8 is an explanatory diagram for explaining an example of a method of connecting the support members shown in FIG. 7; FIG. 7 is a cross-sectional view of a speaker device according to a third modification. FIG. 7 is a front view of a speaker device according to a fourth modification.

Embodiments of the present disclosure will be described below with reference to the drawings. In the drawings, the dimensions and scale of each part are appropriately different from the actual ones. Furthermore, the embodiments described below are preferred specific examples of the present disclosure. For this reason, various technically preferable limitations are attached to this embodiment. However, the scope of the present disclosure is not limited to these forms unless there is a statement that specifically limits the present disclosure in the following description.

FIG. 1 is a sectional view of a speaker device 1 according to an embodiment. Note that FIG. 1 schematically shows a cross-sectional view of the speaker device 1 when the speaker device 1 is cut along a plane passing through a central axis O of a speaker unit 2, which will be described later.

The central axis O of the speaker unit 2 is the central axis O of a magnetic circuit 6, which will be described later. The central axis O is a line segment that is parallel to the vibration direction of the diaphragm 3, which will be described later, and passes through the center of the diaphragm 3. The direction perpendicular to the central axis O is the radial direction Y of the speaker unit 2. In the cross-sectional view of FIG. 1, a direction parallel to the cross section of the speaker device 1 in the radial direction Y is indicated by an arrow. Further, hereinafter, one side in the direction along the central axis O may be referred to as the front side Xf, and the other side (the side opposite to the front side Xf) may be referred to as the back side Xb. For example, the front surface Xf of both surfaces of the diaphragm 3 is a sound emitting surface that emits sound. Furthermore, hereinafter, the direction along the central axis O will also be referred to as the central axis direction X, without particularly distinguishing between the front side Xf and the back side Xb. The central axis direction X corresponds to "the axial direction of the speaker unit".

Further, FIG. 1 shows a state in which the speaker device 1 is inserted into the opening 50a of the attachment target member 50. The mounting target member 50 is not particularly limited, but the mounting target member 50 is a member on which the speaker device 1 is installed so that the sound emitting surface of the speaker unit 2 is approximately parallel to the direction of gravity (the central axis O is approximately horizontal). It is suitably used as For example, the attachment target member 50 is preferably an inner panel of a vehicle door. Note that the attachment target member 50 may be a member other than the inner panel of the vehicle door (for example, a door trim, etc.). Alternatively, the attachment target member 50 may be a member (for example, a cabinet, etc.) used for purposes other than vehicles. Here, the horizontal direction is, for example, a direction parallel to a plane (horizontal plane) perpendicular to the direction of gravity.

For example, the speaker device 1 is fixed to a peripheral portion 50b surrounding the opening 50a of the attachment target member 50 via a plurality of band-shaped or linear support members 30, which will be described later.

The speaker device 1 includes a speaker unit 2, a sealing member 16, a plurality of support members 30, and a mounting member 40. The speaker unit 2 includes a diaphragm 3, a drive section 4, and a speaker frame 5. That is, the speaker unit 2 is a structure in which the diaphragm 3, the drive section 4, and the speaker frame 5 are integrated into a unit.

The diaphragm 3 is a vibrating body that is made of a sheet material and emits sound by vibration. The sheet material is obtained, for example, by curing or solidifying a fiber base material impregnated with a resin material. Examples of the resin material include acrylic resin, polyurethane, melamine resin, modified rubber resin, and phenol resin. Examples of the fiber base material include carbon fiber, aramid fiber, glass fiber, ceramic fiber, silica fiber, metal fiber, potassium titanate fiber, zirconia fiber, polyacrylate fiber, polyphenylene sulfide fiber, vinylon fiber, rayon fiber, and nylon. Examples include fibers, polyester fibers, acrylic fibers, polypropylene fibers, polyethylene fibers, cotton fibers, hemp fibers, and cellulose fibers.

For example, the diaphragm 3 is disposed on the front side Xf of a drive unit 4, which will be described later, and vibrates in the central axis direction X. The diaphragm 3 is cone-shaped. Note that the shape of the diaphragm 3 is not limited to a cone shape, and may be, for example, a dome shape. The diaphragm 3 is an example of a "sound emitting section".

The drive unit 4 is a mechanism that drives the diaphragm 3 based on an input electrical signal. For example, the drive unit 4 includes a magnetic circuit 6 that generates a magnetic field, and a voice coil 7 connected to the diaphragm 3.

The magnetic circuit 6 includes an annular magnet 8, a disc-shaped yoke 9, and a cylindrical center pole 10. Note that the magnet 8, yoke 9, and center pole 10 are arranged coaxially with the center axis O. Further, the magnet 8, yoke 9, and center pole 10 are arranged on the back side Xb of the diaphragm 3 in the central axis direction X. The material of the yoke 9 and the center pole 10 is, for example, a magnetic material.

The magnetic flux generated from the magnet 8 passes through the yoke 9 and the center pole 10. The magnetic flux passing through the magnetic circuit 6 forms a magnetic field around the magnetic circuit 6. Voice coil 7 is placed within a magnetic field formed by magnetic circuit 6 .

The speaker unit 2 further includes a bobbin 11 around which the voice coil 7 is wound. The bobbin 11 includes a cylindrical portion 11a and a center cap 11b. The center cap 11b closes the opening on the front side Xf of the cylindrical portion 11a. The voice coil 7 is wound along the outer peripheral surface of the cylindrical portion 11a of the bobbin 11.

The inner circumference 3a of the diaphragm 3 is connected to the outer circumference of the center cap 11b. That is, the diaphragm 3 is formed around the center cap 11b when viewed from the central axis direction X.

Furthermore, the speaker unit 2 further includes an edge portion 12 having elasticity. The shape of the edge portion 12 when viewed from the central axis direction X is, for example, an annular shape. For example, the edge portion 12 is provided along the outer periphery 3b of the diaphragm 3 when viewed from the central axis direction X. That is, the outer periphery 3b of the diaphragm 3 is connected to the edge portion 12. The diaphragm 3 is connected to the speaker frame 5 via the edge portion 12.

The speaker frame 5 holds the diaphragm 3 and the magnetic circuit 6. The speaker frame 5 is made of metal or resin material. The shape of the speaker frame 5 is not limited to the shape shown in FIG. 1 and may be arbitrary as long as it can hold the diaphragm 3 and the magnetic circuit 6.

The speaker frame 5 includes a cone portion 13, a magnetic circuit housing portion 14, and a flange 15. The cone portion 13 is formed to cover the diaphragm 3 from the outside in the radial direction Y. The magnetic circuit housing portion 14 is arranged on the back side Xb of the cone portion 13 in the central axis direction X. The magnetic circuit accommodating portion 14 accommodates the magnet 8 and the yoke 9 of the magnetic circuit 6. A portion of the center pole 10 on the back side Xb is housed in a magnetic circuit housing section 14 . A front side Xf portion of the center pole 10 extends into the cone portion 13. That is, the magnetic circuit accommodating portion 14 accommodates a part of the magnetic circuit 6.

The flange 15 projects outward in the radial direction Y from the end 13a on the front side Xf of the cone portion 13. The shape of the flange 15 when viewed from the central axis direction X is annular.

Further, the speaker unit 2 further includes a fixing part 20 that fixes the plurality of support members 30 to the speaker frame 5. The fixing portion 20 is provided on the back surface 15b of the flange 15. The shape of the fixing part 20 when viewed from the central axis direction X is annular. For example, the inner diameter of the fixing part 20 is larger than the outer diameter of the end 13a of the cone part 13 on the front side Xf. Further, the outer diameter of the fixing portion 20 may be the same as the outer diameter of the flange 15. A support member 30 is connected to the back surface 20b of the fixed part 20. The back surface 20b is an example of a "first connection surface."

Note that the fixing part 20 is not limited to being fixed to the flange 15. The fixing part 20 may be fixed to the cone part 13 of the speaker frame 5, for example. Further, the fixing portion 20 may be formed integrally with the speaker frame 5. The fixing portion 20 may be formed as a separate member from the flange 15, or may be formed integrally with the flange 15.

Moreover, the fixing part 20 may be arranged apart from the flange 15 in the central axis direction X. The fixing part 20 is not limited to an annular shape. The fixing portion 20 may be formed partially in the circumferential direction of the speaker unit 2. Note that the circumferential direction of the speaker unit 2 is a direction around the central axis O. Further, the fixing portion 20 is not limited to being placed on the back side Xb of the flange 15, but may be placed on the front side Xf of the flange 15. Further, the fixing portion 20 may be arranged inside the flange 15 in the radial direction Y of the speaker unit 2, or may be arranged outside the flange 15.

The attachment member 40 is a member for attaching the speaker unit 2 to the attachment target member 50, and has a predetermined strength. For example, the material of the mounting member 40 is resin. Note that the material of the mounting member 40 may be metal. The shape of the mounting member 40 viewed from the central axis direction X is annular. For example, the attachment member 40 is attached to the peripheral edge 50b of the attachment target member 50 so as to protrude inward in the radial direction Y from the peripheral edge 50b. Moreover, the inner peripheral edge portion 40c of the attachment member 40 protrudes toward the back side Xb. The support member 30 is connected to the back surface 40d of the inner peripheral edge 40c of the attachment member 40. The back surface 40d is an example of a "second connection surface." Note that the inner peripheral edge portion 40c of the attachment member 40 does not need to protrude toward the back side Xb.

The back surface 40b of the attachment member 40 is joined to the front surface 50c of the attachment target member 50. For example, the attachment member 40 may be fixed to the attachment target member 50 with bolts. Note that the attachment member 40 may be joined to the attachment target member 50 by a method other than fixing with bolts. Further, the front surface 40a of the attachment member 40 may be joined to the rear surface 50d of the attachment target member 50.

The plurality of support members 30 are band-shaped or linear members extending in a direction intersecting the central axis O (for example, in the radial direction Y). For example, the support member 30 is formed into a band or line shape using a material that is difficult to stretch in the extending direction and is flexibly deformed in response to rotational motion and twisting. Specifically, the support member 30 may be formed in a linear shape from a material containing at least one of metal, synthetic fiber, and glass fiber. Alternatively, the support member 30 may be a cloth (belt) knitted from fibers made of a durable material with little elongation. Specifically, the support member 30 may be formed into a band shape of glass fiber cloth (glass cloth). In this embodiment, it is assumed that the support member 30 is a linear member (for example, a wire rope).

One end and the other end of each of the plurality of support members 30 are connected to the fixing part 20 and the attachment member 40, respectively. The plurality of supporting members 30 connect the speaker unit 2 and the mounting member 40 by connecting the fixing portion 20 and the mounting member 40. Thereby, the speaker unit 2 is supported by the attachment target member 50 via the plurality of support members 30. That is, the plurality of support members 30 support the speaker unit 2 by connecting the speaker unit 2 and the mounting member 40. Note that a method of connecting the fixing portion 20 and the mounting member 40 to the support member 30 will be described later with reference to FIG. 4.

The sealing member 16 seals the gap between the mounting member 40 and the speaker unit 2. One end and the other end of the sealing member 16 are joined to the front surface 15a of the flange 15 and the front surface 40a of the mounting member 40, respectively. The sealing member 16 is an elastic member, for example, a rubber membrane. The material of the sealing member 16 is not limited to rubber, and may be resin or the like. Further, the sealing member 16 is not limited to a film shape, but may be, for example, a block shape. As described above, in this embodiment, the gap between the speaker unit 2 and the mounting member 40 is sealed by the sealing member 16, so that the sound is prevented from going around from the back side Xb to the front side Xf of the speaker unit 2. Can be suppressed.

Here, in the speaker device 1, the speaker unit 2 may vibrate in the central axis direction X, for example. Although details will be described later with reference to FIG. 3, in this embodiment, the force in the central axis direction X generated in the mounting member 40 is reduced by converting the movement in the central axis direction X into the rotational movement of a pendulum. Thereby, in this embodiment, it is possible to suppress vibrations of the speaker unit 2 from being transmitted to the outside.

FIG. 2 is a front view of the speaker device 1 shown in FIG. 1. Note that FIG. 2 shows the speaker device 1 when viewed from the front side Xf. In FIG. 2, in order to explain the arrangement of the plurality of support members 30, the plurality of support members 30 located on the back side Xb of the sealing member 16 and the like are shown by broken lines. Further, in FIG. 2, the flange 15 and the mounting member 40 are shown by hatching to make the drawing easier to read. The annular broken line in FIG. 2 indicates the peripheral edge 50b of the attachment target member 50.

The four support members 30 are arranged radially around the central axis O. As a result, in this embodiment, support of the speaker unit 2 can be prevented from becoming unstable compared to the case where the speaker unit 2 is supported by two or less supporting members 30. Note that the number of support members 30 is not limited to four. For example, the speaker unit 2 may be supported by three supporting members 30 arranged radially around the central axis O, or by five or more supporting members 30 arranged radially around the central axis O. May be supported.

FIG. 3 is an explanatory diagram for explaining the effect of supporting the speaker unit 2 by the support member 30. The circle mark in FIG. 3 indicates the speaker unit 2, and the direction Yg indicates the direction of gravity. In FIG. 3, it is assumed that the central axis O is perpendicular to the direction of gravity. Furthermore, in FIG. 3, it is assumed that the speaker device 1 is in a state in which one of the four supporting members 30 suspends the speaker unit 2 from the mounting member 40. When no tension is applied to the support members 30 other than the support member 30 suspending the speaker unit 2, the speaker unit 2 swings like a pendulum. In FIG. 3, unless otherwise specified, the support member 30 means the support member 30 from which the speaker unit 2 is suspended, among the four support members 30.

The angle θ indicates the inclination of the support member 30 with respect to the direction of gravity. In addition, the distance x indicates the moving distance of the speaker unit 2 in the central axis direction X with respect to the position of the speaker unit 2 when the angle θ is 0. If the length of the support member 30 in a state where the support member 30 suspends the speaker unit 2 from the mounting member 40 is l, the relationship between the angle θ, the distance x, and the length l is expressed by equation (1). be done. Further, the angle θ is expressed by Equation (2) by transforming Equation (1).

x/l=sinθ...(1)
θ=arcsin(x/l)...(2)

According to equation (2), when the length l of the support member 30 is sufficiently larger than the distance x (l>>x), the angle θ can be regarded as 0. Note that the length l is determined based on, for example, the elongation rate of the support member 30 and the mass of the speaker unit 2.

Furthermore, when the mass of the speaker unit 2 is m and the acceleration in the central axis direction X is a, the force in the central axis direction X of the speaker unit 2 is the product (ma) of the mass m of the speaker unit 2 and the acceleration a. It is expressed as Further, the force in the gravitational direction of the speaker unit 2 is expressed as the product (mg) of the mass m of the speaker unit 2 and the gravitational acceleration g, where g is the gravitational acceleration (acceleration in the direction Yg).

At the connection point of the support member 30 with the speaker unit 2, a force in the direction opposite to the gravitational direction is balanced with "mg", and a force in the direction opposite to the direction of the force acting on the speaker unit 2 along the central axis direction X is "mg". Tension is generated in balance with ma”. Therefore, the force F applied to the support member 30 at the connection point between the support member 30 and the attachment member 40 (the fulcrum of the pendulum) is expressed by equation (3). Further, the force Fx in the central axis direction X generated at the connection point between the support member 30 and the mounting member 40 is expressed by equation (4). Note that in equations (3) and (4), in order to make the equations easier to read, a symbol (•) indicating multiplication is written only after "ma" and "mg".

F=mg・cosθ+ma・sinθ...(3)
Fx=(mg・cosθ+ma・sinθ)sinθ...(4)

From equation (4), for example, when the angle θ is 0, the force Fx is 0. Furthermore, from equations (3) and (4), it can be seen that when the angle θ is small (when the inclination of the support member 30 is small), the force Fx becomes smaller than when the angle θ is large. For example, when the length l of the support member 30 is 10 mm and the distance x is 1 mm, the force Fx is suppressed to 1/10 of the force F (-20 dB) from equations (1) to (4). I understand that.

In this manner, in this embodiment, by converting the motion in the central axis direction X acting on the speaker unit 2 into the rotational motion of the pendulum, the force Fx in the central axis direction X generated on the mounting member 40 can be reduced. . As a result, in this embodiment, it is possible to suppress vibrations of the speaker unit 2 from being transmitted to the mounting member 40.

Further, the resonance frequency of the speaker unit 2 when the speaker unit 2 is suspended by the support member 30 is determined by the length l of the support member 30 and the gravitational acceleration, as the resonance frequency of a pendulum with the speaker unit 2 as a weight. It is calculated based on g. For example, the angular frequency ω of the speaker unit 2 is expressed by equation (5). Further, the resonant frequency f of the speaker unit 2 is expressed by Equation (6) by modifying Equation (5) based on the relationship “ω=2πf”.

ω=√(g/l)...(5)
f=(1/2π)√(g/l)...(6)

The resonance frequency f of the speaker unit 2 when the speaker unit 2 is suspended by the support member 30 is an example of "the resonance frequency of the speaker unit based on the tension of the plurality of support members and the weight of the speaker unit". be. In this embodiment, the speaker unit 2 and the plurality of support members 30 are provided so that the resonance frequency f of the speaker unit 2 is lower than the lowest resonance frequency of the speaker device 1.

For example, when the length l of the support member 30 is 10 mm (l=0.01 m), the resonant frequency f of the speaker unit 2 is about 5 Hz according to equation (6). Therefore, when the speaker device 1 is a woofer (for example, a vehicle door speaker) with a minimum resonance frequency of about 40 Hz to 60 Hz, and the length l of the support member 30 is 10 mm, the resonance frequency f of the speaker unit 2 is: It is lower than the lowest resonant frequency of the speaker device 1.

Note that the lowest resonant frequency of the speaker device 1 is the band of sound input to the speaker unit 2 (more specifically, the diaphragm 3) or the sound band output from the speaker unit 2 (more specifically, the diaphragm 3). corresponds to the lower limit of the band. Therefore, in the above assumption, the resonant frequency f of the speaker unit 2 is lower than the band of sound input to the speaker unit 2 or the band of sound output from the speaker unit 2. Thereby, in this embodiment, it is possible to suppress the quality of the sound emitted from the speaker unit 2 from deteriorating.

Here, as a configuration for suppressing the vibration of the speaker unit 2 from being transmitted to the outside, a configuration can be considered in which an annular leaf spring surrounding the speaker unit 2 is used instead of the support member 30. However, if the leaf spring is made of a strong material in order to have a predetermined strength, the cost of the leaf spring increases. Further, in a configuration in which a leaf spring is used, a stopper is provided to limit displacement of the leaf spring. In this case, the collision sound when the leaf spring collides with the stopper causes abnormal noise. On the other hand, in this embodiment, since the support member 30 is formed of a material that is more flexible than the leaf spring, the mechanical strength can be made higher than in the structure using the leaf spring. Furthermore, in this embodiment, there is no need to make the support member 30 a custom-made product such as a leaf spring, so an increase in manufacturing costs can be suppressed. Furthermore, in this embodiment, the movement of the speaker unit 2 in the central axis direction X is restricted by the plurality of support members 30 arranged radially around the central axis O pulling the speaker unit 2. Therefore, in this embodiment, no abnormal noise such as a collision sound is generated.

FIG. 4 is an explanatory diagram for explaining an example of a method for manufacturing the speaker device 1. As shown in FIG. The upper part of FIG. 4 shows a view of the periphery of the support member 30 seen from the back side Xb, and the lower part of FIG. It shows.

When the plurality of support members 30 are formed of a material that stretches to some extent, for example, when the elongation rate of each of the plurality of support members 30 is 3% or more, the plurality of support members 30 are stretched without slack. On the other hand, when the plurality of support members 30 are made of a material that is difficult to stretch, the plurality of support members 30 are stretched such that they are loosened. In FIG. 4, it is assumed that the elongation rate of each of the plurality of support members 30 is 3% or more.

For example, each of the plurality of support members 30 is fixed to the fixed part 20 with a screw SC1 and a washer WA1, and fixed to the mounting member 40 with a screw SC2 and a washer WA2. The fixing portion 20 is formed with a screw hole Hs1 into which the shaft portion SC1b of the screw SC1 is inserted, and the mounting member 40 is formed with a screw hole Hs2 into which the shaft portion SC2b of the screw SC2 is inserted. Furthermore, the fixing portion 20 includes a protruding portion 20c that surrounds the screw hole Hs1 and protrudes toward the back side Xb. The shape of the protrusion 20c viewed from the central axis direction X is, for example, an annular shape. The outer diameter R1 of the protrusion 20c is larger than the diameter of the head SC1a of the screw SC1. The outer diameter R1 of the protrusion 20c may be the same as the diameter of the head SC1a of the screw SC1 as long as it is larger than the diameter R2 of the shaft SC2b of the screw SC2, or it may be smaller than the diameter of the head SC1a of the screw SC1. You can.

Washer WA1 is arranged between protrusion 20c and head SC1a of screw SC1. The diameter of washer WA1 is larger than the outer diameter R1 of protrusion 20c. Further, the washer WA2 is arranged between the back surface 40d of the inner peripheral edge portion 40c and the head SC2a of the screw SC2. Note that the diameter of the washer WA2 may be the same as the diameter of the head SC2a of the screw SC2, or may be larger than the diameter of the head SC2a of the screw SC2.

Note that the shapes of the fixing portion 20 and the mounting member 40 are not limited to the example shown in FIG. 4. For example, the protrusion 20c may not be formed. In this case, a washer having the same shape as the protruding portion 20c may be placed between the washer WA1 and the fixing portion 20. Further, the mounting member 40 may include a protrusion that surrounds the screw hole Hs2 and protrudes from the inner peripheral edge 40c toward the back side Xb. In this case, the protrusion surrounding the screw hole Hs2 is formed, for example, in an annular shape having an outer diameter smaller than the outer diameter R1 of the protrusion 20c.

Next, a specific example of a connection method for tensioning the support member 30 without loosening will be described.

In the connection method of tensioning the support member 30 without loosening, a spacer SP is used to align the back surface 20b of the fixed portion 20 and the back surface 40d of the inner peripheral edge 40c of the attachment member 40 in the central axis direction X. Note that "match" includes not only exact match but also substantial match (for example, the difference in position between back surface 20b and back surface 40d is within an error range). Spacer SP includes a protrusion SPa that sets the distance between fixing part 20 and attachment member 40 to distance Ds. The shape of the protrusion SPa viewed from the central axis direction X is, for example, an annular shape.

For example, in the connection process of connecting the plurality of support members 30 to the speaker unit 2 and the mounting member 40, the speaker unit 2 and the mounting member 40 are is placed on the spacer SP. Thereby, in the central axis direction X, the position of the back surface 20b of the fixing portion 20 and the position of the back surface 40d of the inner peripheral edge portion 40c of the mounting member 40 are aligned with each other. Furthermore, the distance between the fixed portion 20 and the mounting member 40 on the Y axis (radial direction Y) is determined as the distance Ds.

Then, the support member 30 is folded back at the protrusion 20c and pulled outward in the radial direction Y so as to surround the protrusion 20c and the shaft portion SC2b of the screw SC2. In this state, screws SC1 and SC2 are tightened. Further, the support member 30 surrounding the protruding portion 20c and the shaft portion SC2b of the screw SC2 is crimped by the sleeve SL. This prevents the support member 30 from coming off the screws SC1 and SC2. After the support member 30 is crimped by the sleeve SL, the spacer SP is removed.

As described above, in the manufacturing method shown in FIG. 4, since the spacer SP is used to align the positions of the back surface 20b of the fixing part 20 and the back surface 40d of the inner peripheral edge 40c of the mounting member 40 in the central axis direction X, a plurality of spacers SP are used. The support member 30 can be stretched without slack. That is, when the elongation rate of each of the plurality of support members 30 is 3% or more, the plurality of support members 30 are A supporting member 30 is connected to the speaker unit 2 and the mounting member 40. Note that the predetermined state is, for example, a state in which the position of the back surface 20b of the fixing portion 20 and the position of the back surface 40d of the inner peripheral edge portion 40c of the mounting member 40 coincide with each other in the central axis direction X.

In this embodiment, when the support members 30 are made of a material that stretches to some extent, the plurality of support members 30 are stretched without slack, so that support for the speaker unit 2 can be stabilized. Note that since the support members 30 are made of a material that stretches to some extent, even when the plurality of support members 30 are stretched without slack, the movement in the central axis direction X can be converted into the rotational movement of a pendulum. For example, the resonant frequency f of the speaker unit 2 is lower than the lowest resonant frequency of the speaker device 1. Therefore, in this embodiment, by forming the support member 30 from a material that stretches to some extent, it is possible to stabilize the support of the speaker unit 2 and to suppress the vibration of the speaker unit 2 from being transmitted to the mounting member 40. .

FIG. 5 is an explanatory diagram for explaining another example of the method for manufacturing the speaker device 1. The upper and lower rows in FIG. 5 correspond to the upper and lower rows in FIG. 4, respectively. Detailed explanation of the elements explained in FIG. 4 will be omitted. In FIG. 5, it is assumed that each of the plurality of support members 30 is formed of a material that can be deformed with an elongation rate of 1% or less. That is, in FIG. 5, it is assumed that the plurality of support members 30 are made of a material that is difficult to stretch. In this case, the plurality of support members 30 are stretched so that they are loosened.

The connection method in which the support member 30 is stretched so that there is slack is the same as the connection method in which the support member 30 is stretched without slack as explained in FIG. 4, except that spacer SP2 is used instead of the spacer SP shown in FIG. The same is true.

In the connection method in which the support member 30 is stretched so as to generate slack, a spacer SP2 is used that makes the positions of the back surface 20b of the fixing part 20 and the back surface 40d of the inner peripheral edge 40c of the attachment member 40 different in the central axis direction X. Note that the central axis direction X is an example of "a direction perpendicular to the first connection surface."

For example, in the connection process of connecting the plurality of support members 30 to the speaker unit 2 and the mounting member 40, the speaker unit 2 and the mounting member 40 are is arranged on the spacer SP2. Thereby, in the central axis direction X of the speaker unit 2 and the mounting member 40, the position of the back surface 20b of the fixing portion 20 and the position of the back surface 40d of the inner peripheral edge portion 40c of the mounting member 40 are maintained in a different state from each other. Furthermore, the distance between the fixed portion 20 and the mounting member 40 on the Y axis (radial direction Y) is determined as the distance Ds.

Then, in the connection step, similarly to the connection method in which the support members 30 are stretched without slack, each of the plurality of support members 30 is connected without slack to the back surface 20b of the fixed portion 20 and the back surface 40d of the inner peripheral edge portion 40c, and the spacer SP2 is remove.

As a result, for example, in a state (predetermined state) in which the position of the back surface 20b of the fixing portion 20 and the position of the back surface 40d of the inner circumferential edge portion 40c of the mounting member 40 coincide with each other in the central axis direction X, the fixing portion 20 and The length of the support member 30 between it and the attachment member 40 becomes longer than the distance Ds. Therefore, when the speaker unit 2 is in a predetermined state, the plurality of support members 30 become slack. That is, when each of the plurality of support members 30 is formed of a material that can be deformed with an elongation rate of 1% or less, the total tension of the plurality of support members 30 when the speaker unit 2 is in a predetermined state is: It is 0.

As described above, in this embodiment, even when the support members 30 are made of a material that is difficult to stretch, the plurality of support members 30 are stretched in such a way that slack occurs in the plurality of support members 30, so that the support members 30 are stretched in the central axis direction. The motion of X can be converted into the rotational motion of the pendulum. As a result, in this embodiment, even when the support member 30 is made of a material that is difficult to stretch, it is possible to suppress vibrations of the speaker unit 2 from being transmitted to the mounting member 40.

Moreover, in this embodiment, it is possible to use a general-purpose material, either a material that stretches to some extent or a material that does not stretch easily. Therefore, in this embodiment, compared to a configuration in which the speaker unit 2 and the mounting member 40 are connected by a dedicated spring member or the like, the cost of the configuration for suppressing the vibration of the speaker unit 2 from being transmitted to the outside is higher. can suppress the increase in That is, in this embodiment, it is possible to suppress the vibration of the speaker unit 2 from being transmitted to the outside while suppressing an increase in manufacturing costs.

Note that when the elongation rate of the support member 30 is greater than 1% and less than 3%, the support member 30 may be stretched so as to have slack or may be stretched without slack. For example, even if the elongation rate of the support member 30 is less than 3%, the motion in the central axis direction If it can be lowered, the support member 30 may be stretched without slack.

As described above, in the present embodiment, the speaker device 1 includes a speaker unit 2 having a diaphragm 3, a mounting member 40 for attaching the speaker unit 2 to an object (mounting target member 50), and a mounting member 40 that intersects with the central axis O of the speaker unit 2. It has a plurality of linear support members 30 that extend in the direction and support the speaker unit 2 by connecting the speaker unit 2 and the mounting member 40 .

In this manner, in this embodiment, the speaker unit 2 can be supported using a linear member such as a wire rope, which is a general-purpose item that is cheaper than a spring member or the like. For example, each of the plurality of support members 30 may be formed of a material containing at least one of metal, synthetic fiber, and glass fiber. Further, in this embodiment, since the speaker unit 2 is suspended by the support member 30, when a force is applied to the speaker unit 2 in the direction along the central axis O (central axis direction X), the speaker unit 2 swings like a pendulum. Thereby, in this embodiment, the motion in the central axis direction X can be converted into the rotational motion of the pendulum. As a result, in this embodiment, the force in the central axis direction X that is generated outside the speaker unit 2 (for example, the mounting member 40) can be reduced. In this manner, in this embodiment, it is possible to suppress the vibration of the speaker unit 2 from being transmitted to the outside while suppressing an increase in manufacturing costs.

Furthermore, in this embodiment, the speaker device 1 further includes a sealing member 16 that seals the gap between the mounting member 40 and the speaker unit 2. As a result, in this embodiment, it is possible to prevent the sound emitted from the side opposite to the sound emitting surface of the speaker unit 2 from passing between the mounting member 40 and the speaker unit 2 and being emitted (going around). can.

Further, in the present embodiment, the resonance frequency f of the speaker unit 2 based on the tension of the plurality of supporting members 30 and the weight of the speaker unit 2 is the band of the sound input to the speaker unit 2 or the sound output from the speaker unit 2. lower than the sound band. That is, in this embodiment, the resonance frequency f of the speaker unit 2 suspended by the support member 30 is lower than the frequency band used by the speaker unit 2. Therefore, in this embodiment, it is possible to suppress the quality of the sound emitted from the speaker unit 2 from deteriorating.

Moreover, in this embodiment, the elongation rate of each of the plurality of support members 30 may be 3% or more. In the speaker device 1 in which each of the plurality of support members 30 has an elongation rate of 3% or more, when the state of the speaker unit 2 is in a predetermined state, the tension of all the plurality of support members 30 is greater than 0. Good too. In this case, since the plurality of support members 30 are stretched without slack, the speaker unit 2 can be stably supported. That is, in this embodiment, by using the support member 30 with an elongation rate of 3% or more, it is possible to stabilize the support of the speaker unit 2 while suppressing vibrations of the speaker unit 2 from being transmitted to the outside. .

Further, in this embodiment, each of the plurality of support members 30 may be formed of a material that can be deformed with an elongation rate of 1% or less. In the speaker device 1 in which the plurality of support members 30 are formed of a deformable material with an elongation rate of 1% or less, when the state of the speaker unit 2 is in a predetermined state, the tension of all the plurality of support members 30 is It may be 0. In this case, since the plurality of support members 30 are stretched so as to generate slack, movement in the central axis direction X can be converted into a rotational movement of a pendulum. That is, in the present embodiment, even when the plurality of support members 30 are formed of a deformable material with an elongation rate of 1% or less, the speaker unit can be stretched by stretching the plurality of support members 30 so that there is slack. It is possible to suppress the vibration of No. 2 from being transmitted to the outside.

Further, in this embodiment, the plurality of supporting members 30 may support the speaker unit 2 so that the central axis direction X (the axial direction of the speaker unit 2) is in the horizontal direction. Note that the fact that the central axis direction X is horizontal does not mean that the central axis direction X is strictly horizontal; it also means that the central axis direction Including becoming. When the speaker unit 2 is supported so that the central axis direction X is horizontal, the movement in the central axis direction X can be efficiently converted into the rotational movement of a pendulum.

Furthermore, the method for manufacturing the speaker device 1 in which the plurality of support members 30 are stretched such that they are loosened includes a connecting step of connecting the plurality of support members 30 to the speaker unit 2 and the mounting member 40. In the connection step, the speaker unit 2 and the mounting member 40 are arranged on a spacer SP2 that makes the positions of the back surface 20b of the fixing part 20 and the back surface 40d of the mounting member 40 different in the central axis direction Each is connected to the back surface 20b and the back surface 40d, and the spacer SP2 is removed. Note that the back surface 20b of the fixing portion 20 is a surface to which a plurality of support members 30 of the speaker unit 2 are connected, and the back surface 40d is a surface to which a plurality of support members 30 of the mounting members 40 are connected. The central axis direction X is a direction perpendicular to the back surface 20b.

As described above, in this embodiment, by using the spacer SP2, it is possible to easily connect the plurality of support members 30 to the speaker unit 2 and the mounting member 40 so that the plurality of support members 30 are loosened. can.

Note that the embodiments illustrated above may be modified in various ways. Specific modifications that can be applied to the above-described embodiments are illustrated below. Two or more aspects arbitrarily selected from the following examples may be combined to the extent that they do not contradict each other.

In the embodiment described above, the case where the support member 30 is crimped by the sleeve SL is illustrated, but the present disclosure is not limited to such an aspect. For example, the support member 30 may be formed of a lead wire and may be connected to the fixing portion 20 and the attachment member 40 by solder. This modification (first modification) will be described with reference to FIG. 6.

FIG. 6 is an explanatory diagram for explaining an example of a method for connecting the support member 30A according to the first modification. Note that FIG. 6 shows a view around the support member 30A viewed from a direction perpendicular to the extending direction of the support member 30A. In this modification, it is assumed that the support member 30 is formed of a lead wire. The lead wire may be a conducting wire containing aramid fiber, for example. This type of lead wire has high tensile strength and heat resistance.

The speaker device 1 of this modified example is the speaker device 1 of the embodiment described above, except that it has a supporting member 30A, a fixing portion 20A, and a mounting member 40A instead of the supporting member 30, the fixing portion 20, and the mounting member 40. It is similar to

The fixing part 20A has a through hole H1 passing through the fixing part 20A in the central axis direction X, and the mounting member 40A has a through hole H2 passing through the mounting member 40A in the central axis direction X. Further, a terminal TE1 is fixed to the fixing portion 20A, and a terminal TE2 is fixed to the mounting member 40A. For example, the terminal TE1 is formed integrally with the fixing portion 20A by insert molding. Similarly, the terminal TE2 is integrally formed with the mounting member 40A by insert molding.

The support member 30A passes through the through holes H1 and H2 and is fixed to the terminal TE1 and the terminal TE2. For example, one end of the support member 30A is fixed to the terminal TE1 with solder SO1, and the other end of the support member 30A is fixed to the terminal TE2 with solder SO2. Further, the through hole H1 is closed with adhesive AD1, and the through hole H2 is closed with adhesive AD2.

In the configuration in which the support member 30A is connected to the terminal TE1 and the terminal TE2 through the through holes H1 and H2, compared to the configuration in which the support member 30A is connected to the terminal TE1 and the terminal TE2 without passing through the through holes H1 and H2. , the force applied to the terminals TE1 and TE2 can be reduced. As a result, in a configuration in which the support member 30A is connected to the terminal TE1 and the terminal TE2 through the through holes H1 and H2, the connection between each of the terminals TE1 and TE2 and the support member 30A becomes unstable, and the terminal Damage to TE1 and TE2 can be suppressed. Note that the support member 30A may be connected to the terminal TE1 and the terminal TE2 without passing through the through holes H1 and H2.

As described above, the same effects as in the above-described embodiment can be obtained also in this modification.

Further, in the above-described embodiments and modified examples, the support member 30 is a linear member, but the present disclosure is not limited to such an embodiment. For example, the support member 30 may be formed into a belt shape of cloth knitted from fibers made of a material that is strong and has little elongation. This modification (second modification) will be described with reference to FIGS. 7 and 8.

FIG. 7 is an explanatory diagram for explaining an example of a support member 30B according to a second modification. Note that FIG. 7 shows the support member 30B viewed from the back side Xb.

The support member 30B is formed into a band shape of glass fiber cloth (glass cloth). Glass fiber has good processability, less elongation, and is easy to handle. For example, the support member 30B is formed by processing glass cloth with a cutting die. Further, the support member 30B has two through holes H3 through which shaft portions SC3b of two screws SC3 (described later in FIG. 8) pass, and two through holes H4 through which shaft portions SC4b of two screws SC4 pass, respectively. For example, the above-mentioned cutting die includes a die for making holes in the glass cloth corresponding to the two through holes H3 and the two through holes H4. Note that the number of through holes H3 and H4 is not limited to the example shown in FIG. 7.

FIG. 8 is an explanatory diagram for explaining an example of a method of connecting the support member 30B shown in FIG. 7. The upper part of FIG. 8 shows a view around the support member 30 as seen from the back side Xb, and the lower part of FIG. 8 shows a cross-sectional view of the support member 30 around the line A1-A2.

The speaker device 1 of this modification example is the speaker device 1 of the embodiment described above, except that it has a support member 30B, a fixing portion 20B, and a mounting member 40B instead of the supporting member 30, the fixing portion 20, and the mounting member 40. It is similar to

The fixing part 20B has a screw hole Hs3 into which the shaft SC3b of the screw SC3 is inserted, and the mounting member 40B has a screw hole Hs4 into which the shaft SC4b of the screw SC4 is inserted. Support member 30B is fixed to fixed part 20B by screw SC3 and fixed part FI1, and fixed to mounting member 40B by screw SC4 and fixed part FI2. The fixed component FI1 has a through hole through which the shaft portion SC3b of the screw SC3 passes, and is arranged between the support member 30B and the head SC3a of the screw SC3. The fixed component FI2 has a through hole through which the shaft portion SC4b of the screw SC4 passes, and is arranged between the mounting member 40B and the head SC4a of the screw SC4. That is, the shaft portion SC3b of the screw SC3 passes through the through hole of the fixed component FI1 and the through hole H3 of the support member 30B, and is inserted into the screw hole Hs3 of the fixed portion 20B. Similarly, the shaft portion SC4b of the screw SC4 passes through the through hole of the fixed component FI2 and the through hole H4 of the support member 30B, and is inserted into the screw hole Hs4 of the mounting member 40B.

As described above, the same effects as in the above-described embodiment can be obtained also in this modification.

Further, in the above-described embodiments and modified examples, the speaker unit 2 is suspended by the support member 30 from a position near the end 13a of the cone portion 13 in the central axis direction X. It is not limited to this embodiment. For example, the speaker unit 2 may be suspended in the central axis direction X from a position near the bottom of the cone portion 13 by the support member 30, 30A, or 30B. This modification (third modification) will be described with reference to FIG. 9.

FIG. 9 is a cross-sectional view of a speaker device 1A according to a third modification. Note that, similarly to FIG. 1, FIG. 9 schematically shows a cross-sectional view of the speaker device 1A when the speaker device 1A is cut along a plane passing through the central axis O of the speaker unit 2.

The speaker device 1A includes a fixing part 20A, a supporting member 30A, and a mounting member 40A instead of the fixing part 20, the supporting member 30, and the mounting member 40 shown in FIG. The speaker unit 2 is suspended in the central axis direction X from a position near the bottom portion 13b of the cone portion 13 by the support member 30A. The other configuration of the speaker device 1A is the same as the speaker device 1 shown in FIG. 1.

The fixing portion 20A is fixed to the cone portion 13 so as to protrude outward in the radial direction Y from the bottom portion 13b of the cone portion 13. Note that the fixing portion 20A may be formed as a separate member from the cone portion 13, or may be formed integrally with the cone portion 13.

The attachment member 40A is attached to the attachment target member 50A such that the front side Xf surface of the attachment member 40A and the front side Xf surface of the fixing part 20A are aligned in the central axis direction X. Note that the attachment target member 50A includes, for example, a portion connecting a portion to which the sealing member 16 is joined and a portion to which the attachment target member 50A is attached.

Note that the configuration of the speaker device 1A is not limited to the example shown in FIG. 9. For example, the speaker device 1A may have the fixing part 20, the supporting member 30, and the mounting member 40 instead of the fixing part 20, the supporting member 30, and the mounting member 40, or the speaker device 1A may have the fixing part 20B, the supporting member 30B, and the mounting member 40. It may also include a member 40B.

As described above, the same effects as in the above-described embodiment can be obtained also in this modification.

Further, in the embodiment described above, the four supporting members 30 are arranged radially around the central axis O, but the present disclosure is not limited to such an embodiment. For example, three support members 30 may be arranged radially around the central axis O. This modification (fourth modification) will be described with reference to FIG. 10.

FIG. 10 is a front view of a speaker device 1 according to a fourth modification. Note that, similarly to FIG. 2, FIG. 4 shows the speaker device 1 when viewed from the front side Xf. The meanings of the broken lines and shading in FIG. 4 are the same as those of the broken lines and shading in FIG.

The three support members 30 are arranged radially around the central axis O. Therefore, in this modification, the speaker unit 2 can be supported more stably than when the speaker unit 2 is supported by two or less supporting members 30. Note that the speaker device 1 may include a support member 30A or 30B instead of the support member 30.

As described above, the same effects as in the above-described embodiment can be obtained also in this modification. Moreover, in this modification, since the number of support members 30 is three, manufacturing costs can be reduced compared to the case where the number of support members 30 is four or more.

Further, in the above-described embodiment, the sealing member 16 that seals the gap between the mounting member 40 and the flange 15 is described, but the sealing member 16 may have other configurations. For example, the sealing member may seal gaps between a plurality of components other than the mounting member 40 and the flange 15. As described above, the same effects as in the above-described embodiment can be obtained also in this modification.

DESCRIPTION OF SYMBOLS 1, 1A...Speaker device, 2...Speaker unit, 3...Diaphragm, 5...Speaker frame, 15...Flange, 20, 20A, 20B...Fixing part, 30, 30A, 30B...Supporting member, 40, 40A, 40B... Attachment member, 50, 50A... Attachment target member, 50a... Opening, 50b... Periphery.

Claims (9)

a speaker unit having a sound emitting section;
a mounting member for attaching the speaker unit to an object;
a plurality of band-shaped or linear support members that extend in a direction intersecting a central axis of the speaker unit and support the speaker unit by connecting the speaker unit and the mounting member;
A speaker device comprising: further comprising a sealing member that seals a gap between the mounting member and the speaker unit;
The speaker device according to claim 1. The plurality of support members are three support members,
The three support members are arranged radially around the central axis,
The speaker device according to claim 1. The resonance frequency of the speaker unit based on the tension of the plurality of support members and the weight of the speaker unit is lower than the band of sound input to the speaker unit or the band of sound output from the speaker unit.
The speaker device according to claim 1. The elongation rate of each of the plurality of supporting members is 3% or more,
When the state of the speaker unit is in a predetermined state, the tension of all of the plurality of support members is greater than 0.
The speaker device according to claim 4. Each of the plurality of supporting members is formed of a deformable material with an elongation rate of 1% or less,
When the state of the speaker unit is in a predetermined state, the tension of all of the plurality of support members is 0.
The speaker device according to claim 4. Each of the plurality of support members is formed of a material containing at least one of metal, synthetic fiber, and glass fiber.
The speaker device according to claim 1. The plurality of supporting members support the speaker unit so that the axial direction of the speaker unit is in a horizontal direction.
The speaker device according to claim 1. A method for manufacturing a speaker device comprising a speaker unit having a sound emitting part and a mounting member for attaching the speaker unit to an object, the method comprising:
a connecting step of connecting a plurality of band-shaped or linear support members extending in a direction intersecting a central axis of the speaker unit and supporting the speaker unit to the speaker unit and the mounting member;
In the connection step,
A first connection surface to which the plurality of support members of the speaker unit are connected and a second connection surface to which the plurality of support members of the mounting members are connected, perpendicular to the first connection surface. arranging the speaker unit and the mounting member on spacers having different positions in different directions;
connecting each of the plurality of support members to the first connection surface and the second connection surface;
removing the spacer;
A method of manufacturing a speaker device.

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