阅读说明：本技术 减振部件 (Vibration damping member ) 是由 三木晃 冈田优子 森田浩一 于 2020-03-24 设计创作，主要内容包括：提供一种结构简单、向框体的安装容易的减振部件。一种减振部件(100A),其安装在音响装置的框体内部,由第一部件(101)、第二部件(102)和第三部件(103)构成,经由第三部件(103)连接第一部件(101)和第二部件(102)。第三部件(103)具有比第一部件(101)以及第二部件(102)低的弹性模量。(Provided is a vibration damping member which has a simple structure and can be easily attached to a housing. A vibration damping member (100A) is mounted inside the housing of an acoustic device, and is configured from a first member (101), a second member (102), and a third member (103), and the first member (101) and the second member (102) are connected via the third member (103). The third member (103) has a lower modulus of elasticity than the first member (101) and the second member (102).)

1. A vibration damping member characterized by comprising a base member,

the vibration damping member is mounted inside a housing of the acoustic device and includes a first member, a second member, and a third member,

connecting the first component and the second component via the third component,

the third member has a lower modulus of elasticity than the first member and the second member.

2. Damping part according to claim 1,

the first member and the second member have a first opposing region and a second opposing region that are opposed to each other,

the third member is disposed in a gap between the first opposing region and the second opposing region.

3. Damping part according to claim 1 or 2,

the third component is a viscoelastic body.

4. Damping part according to one of claims 1 to 3,

at least one of the first member and the second member is provided with an overall length adjustment unit for adjusting the overall length of the vibration damping member.

5. The vibration damping member according to any one of claims 1 to 4,

the first member and the second member are cylindrical in shape,

the first part has a hollow area into which the second part is inserted,

the third member is sandwiched between an inner wall surface of the hollow region of the first member and an outer wall surface of the second member inserted into the hollow region.

6. Damping part according to claim 5,

the first member or the second member has an opening in at least one of them.

7. The vibration damping member according to any one of claims 1 to 4,

the first and second parts are plate bodies,

the third member is sandwiched between the plate surface of the first member and the plate surface of the second member.

8. The vibration damping member according to any one of claims 1 to 7,

the first member is in contact with one face inside the frame,

the second member is in contact with a surface of the frame body other than the one surface.

9. Damping part according to claim 8,

the first member and the second member are in contact with the one surface and the different surface facing each other in the housing, respectively.

10. An audio device is characterized in that a sound source,

the vibration damping member according to any one of claims 1 to 7 is provided, the first member is in contact with one face in the housing, and the second member is in contact with a face different from the one face.

11. Acoustic apparatus according to claim 10,

the first member and the second member are respectively in contact with the one surface and the different surface facing each other in the housing.

12. An acoustic apparatus is characterized by comprising:

a frame body;

a speaker unit fixed to the housing;

a vibration damping member mounted inside the housing;

the frame body has a first wall and a second wall different from the first wall as walls delimiting the interior of the frame body,

the vibration damping member includes:

a first member abutting against the first wall;

a second member abutting the second wall;

and a third member that connects the first member and the second member and has a lower elastic modulus than the first member and the second member.

13. Acoustic apparatus according to claim 12,

the first wall and the second wall face each other.

14. Acoustic apparatus according to claim 12 or 13,

the third member connects the first member and the second member so as to allow a distance between the first wall with which the first member is in contact and the second wall with which the second member is in contact to be varied when the speaker unit is operated.

15. The vibration damping member according to any one of claims 12 to 14,

The third component is a viscoelastic body.

16. The vibration damping member according to any one of claims 12 to 15,

the first member and the second member are cylindrical in shape,

the first part has a hollow area into which the second part is inserted,

the third member is sandwiched between an inner wall surface of a hollow region of the first member and an outer wall surface of the second member inserted into the hollow region.

Technical Field

The present disclosure relates to a vibration damping member for suppressing vibration generated in a casing of an acoustic apparatus.

Background

In an acoustic apparatus such as a speaker, it is known that vibration is generated in a housing due to mechanical vibration of the speaker or sound pressure in the housing, and the vibration becomes noise and is emitted from the acoustic apparatus, thereby deteriorating the sound quality of reproduced sound. Therefore, in the acoustic apparatus, a stopper is provided as a mechanism for suppressing such vibration of the housing, and the stopper is deformed by the propagated vibration to absorb the vibration and attenuate the vibration of the housing.

In the technique disclosed in patent document 1, a bar-shaped reinforcing member is provided between opposing walls of a speaker cabinet. Here, one end of the reinforcement is fixed to the wall by a flanged ring. In more detail, a ring portion of the flanged ring is inserted into an opening provided on the wall, the flange portion is screwed to the wall, and one end of the reinforcement is inserted into an opening hollowed out in the ring portion. A stopper is interposed between an inner peripheral surface of the opening of the ring portion and an outer peripheral surface of the end portion of the reinforcement. Shear deformation is generated on the stopper due to vibration generated in the wall of the speaker cabinet. Due to the occurrence of this shear deformation, the vibration of the wall is absorbed.

Documents of the prior art

Patent document

Patent document 1: japanese Kokai publication Sho 55-29819

Disclosure of Invention

Problems to be solved by the invention

In the technique disclosed in patent document 1, since a flanged ring is used, an opening for attaching the flanged ring needs to be provided in a wall of the housing. In addition, it is necessary to secure the flanged ring to the wall by screw fastening.

The present disclosure has been made in view of the above-described circumstances, and an object thereof is to provide a vibration damping member having a simple structure and easily attached to a housing.

Means for solving the problems

The present disclosure provides a vibration damping member which is attached to the inside of a housing of an acoustic apparatus, and which is composed of a first member, a second member, and a third member, wherein the first member and the second member are connected via the third member, and wherein the third member has a lower modulus of elasticity than the first member and the second member.

In addition, the present disclosure provides an acoustic apparatus including: a frame body; a speaker unit fixed to the housing; a vibration damping member mounted inside the housing; the frame body has a first wall and a second wall different from the first wall as walls defining the interior of the frame body, and the vibration damping member has: a first member abutting against the first wall; a second member abutting the second wall; and a third member that connects the first member and the second member and has a lower elastic modulus than the first member and the second member.

Drawings

Fig. 1 is a sectional view showing a structure of a speaker in which a vibration damping member as a first embodiment of the present disclosure is attached to a housing.

Fig. 2 is a sectional view of the vibration damping member.

Fig. 3 is a sectional view taken along line III-III' of fig. 2.

Fig. 4 is a sectional view showing the structure of a vibration damping member as a second embodiment of the present disclosure.

Fig. 5 is a sectional view showing the structure of a vibration damping member as a third embodiment of the present disclosure.

Fig. 6 is a sectional view showing the structure of a vibration damping member as another embodiment of the present disclosure.

Fig. 7 is a sectional view showing the structure of a vibration damping member as another embodiment of the present disclosure.

Fig. 8 is a sectional view showing the structure of a vibration damping member as another embodiment of the present disclosure.

Fig. 9 is a sectional view showing the structure of a vibration damping member as another embodiment of the present disclosure.

Fig. 10 is a sectional view showing a structure of a speaker in which a vibration damping member as another embodiment of the present disclosure is attached to a housing.

Detailed Description

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

< first embodiment >

Fig. 1 is a sectional view showing a structure of a speaker attached to a housing 1 as a vibration damping member 100A according to a first embodiment of the present disclosure. In fig. 1, the housing 1 is a rectangular parallelepiped housing surrounded by a front surface wall 1F, a rear surface wall 1B, a left side surface wall 1L, a right side surface wall 1R, a bottom surface wall and a top surface wall, not shown, on which the speaker units SP are provided. The vibration damping member 100A according to the present embodiment is a substantially rod-shaped member as a whole, and both ends are brought into contact with a substantially center of the left side wall 1L and a substantially center of the right side wall 1R, and fixed in the housing 1 while being sandwiched between the left side wall 1L and the right side wall 1R. The vibration damping member 100A may be fixed at both ends to the left side wall 1L and the right side wall 1R by an adhesive, but may be fixed by a contact pressure against the left side wall 1L and the right side wall 1R. As shown in fig. 1, the vibration damping member 100A preferably has both ends in contact with a pair of walls facing each other among the plurality of walls defining the inside of the housing 1. Therefore, the first member 101 described later can be brought into contact with the left side wall 1L and the second member 102 described later can be brought into contact with the right side wall 1R, but the present invention is not limited to this, and for example, the first member 101 can be brought into contact with the entire surface wall 1F and the second member 102 can be brought into contact with the back surface wall.

Fig. 2 is a cross-sectional view of the damping member 100A cut along a plane including the center axis thereof. In addition, fig. 3 is a sectional view taken along line III-III' of fig. 2. The vibration damping member 100A has a first member 101, a second member 102, and a third member 103. In the illustrated example, the first member 101 has a hollow cylindrical shape. The second member 102 has a central axis common to the first member 101, and has a cylindrical shape having an outer diameter shorter than the inner diameter of the first member 101, and a portion near one end is inserted into the hollow region of the first member 101. The end of the first member 101 opposite to the second member 102 is in contact with the left side wall 1L, and the end of the second member 102 opposite to the first member 101 is in contact with the right side wall 1R. The third member 103 has a cylindrical shape that fills the gap of the portion where the second member 102 is inserted into the first member 101. The inner wall of the third member 103 is bonded to the outer wall of the second member 102 by an adhesive, and the outer wall of the third member 103 is bonded to the inner wall of the first member 101 by an adhesive. The third member may be fixed not only by an adhesive but also by pressure generated by deformation of the third member. Thus, the first member 101 and the second member 102 are connected via the third member 103, and are formed integrally into a substantially rod-like shape as a whole. The first member 101 and the second member 102 have a first opposing region and a second opposing region that face each other, that is, an inner wall surface (first opposing region) of a portion of the first member 101 that accommodates the second member 102 and an outer wall surface (second opposing region) of a portion of the second member 102 that is inserted into the first member 101, and the third member 103 having a cylindrical shape is disposed in a gap between the first opposing region and the second opposing region.

In the present embodiment, the force due to the vibration of the housing 1 is transmitted to the third member 103 via the left side wall 1L and the first member 101, and transmitted to the third member 103 via the right side wall 1R and the second member 102, whereby the third member 103 is shear-deformed, and the vibration of the housing 1 is attenuated by the third member 103 absorbing the vibration energy. That is, the third member 103 connects the first member 101 and the second member 102 so as to allow variation in the distance between the left side wall 1L with which the first member 101 abuts and the right side wall 1R with which the second member 102 abuts when the speaker unit SP operates and the housing 1 vibrates.

The first member 101 and the second member 102 need to transmit the force from the left side wall 1L and the right side wall 1R to the third member 103. Therefore, the first member 101 and the second member 102 need to be made of a material having at least a higher elastic modulus than the third member 103, and ideally, rigid bodies. In the present embodiment, the first member 101 and the second member 102 are made of metal such as aluminum having high rigidity. The third member 103 is shear-deformed by a force applied through the first member 101 and the second member 102, and therefore needs to have elasticity to return to its original shape and sufficient viscosity to absorb vibration energy. Therefore, a viscoelastic body such as rubber having viscosity and elasticity is used as the third member 103. The viscoelastic body used in the third member 103 can be appropriately selected according to the frequency band range to be absorbed. For example, in the present embodiment, in order to absorb the primary vibration mode of the housing, the viscoelastic body may be selected in accordance with the frequency of the primary vibration mode.

According to the present embodiment, when vibration is generated in the housing 1, a force based on the vibration is transmitted from the left side wall 1L to the third member 103 via the first member 101, and is transmitted from the right side wall 1R to the third member 103 via the second member 102. As a result, shear deformation occurs in the third member 103, and vibration energy is absorbed, thereby damping vibration of the housing 1. Specifically, the vibration energy is converted into thermal energy by the third member that is shear-deformed. Therefore, according to the present embodiment, noise caused by vibration of the housing 1 can be suppressed in the speaker, and the sound quality of reproduced sound can be improved. Note that, if vibration is sufficiently transmitted from the left side wall 1L and the right side wall 1R to the first member 101 and the second member 102, the first member 101 and the second member 102 do not need to be in direct contact with the left side wall 1L and the right side wall 1R, and may be formed by another member. In the present embodiment, the damping member 100A can be supported by applying a contact pressure to the left side wall 1L and the right side wall 1R by a restoring force generated by the deformation of the third member 103. Therefore, it is not necessary to provide a hole for attaching the vibration damping member 100A to the wall surface of the housing, and the end of the vibration damping member 100A is attached to the hole by a flanged ring, and the vibration damping member 100A can be attached to the housing 1 only by being sandwiched between the left side wall 1L and the right side wall 1R. As described above, according to the present embodiment, the vibration damping member 100A having a simple structure and easily attached to the housing 1 can be realized.

< second embodiment >

Fig. 4 is a sectional view showing the structure of a vibration damping member 100B as a second embodiment of the present disclosure. As in the first embodiment, the damping member 100B is also substantially rod-shaped as a whole, and is attached to a housing such as a speaker in a state of being sandwiched between two opposing wall surfaces of the housing.

The vibration damping member 100B includes three plate-shaped first members 111 arranged in parallel and two plate-shaped second members 112 arranged in parallel. The end portions of the two second members 112 are inserted between the end portions of the adjacent two first members 111. The portions near the ends of the first member 111 and the portions near the ends of the second member 112 are alternately arranged at equal intervals. The plate surface near the end of the first member 111 and the plate surface near the end of the second member 112 adjacent to each other form a first opposing region and a second opposing region that face each other, and a plate-shaped third member 113 is sandwiched between the first opposing region and the second opposing region.

In the present embodiment, as in the first embodiment, the first member 111 and the second member 112 are also made of metal such as aluminum having high rigidity, and the third member 113 is made of a viscoelastic body such as rubber. In the present embodiment, the same effects as those of the first embodiment can be obtained.

< third embodiment >

Fig. 5 is a sectional view showing the structure of a vibration damping member 100C as a third embodiment of the present disclosure. As in the first and second embodiments, the damping member 100C is also substantially rod-shaped as a whole, and is attached to a housing such as a speaker in a state of being sandwiched between two opposing wall surfaces of the housing.

The vibration damping member 100C includes a rod-shaped first member 121 and a rod-shaped second member 122 having the same central axis, and a third member 123 inserted between end portions of the first member 121 and the second member 122. As in the first and second embodiments, the first member 121 and the second member 122 are rigid bodies made of metal such as aluminum. Further, the third member 123 is made of foamed rubber.

In the present embodiment, a force based on the vibration of the housing is transmitted to the third member 123 via the first member 121 and the second member 122, and compression/extension deformation is generated in the third member 123. However, the third member 123 made of foamed rubber also has an effect of absorbing vibration energy during compression/extension deformation. Therefore, the vibration of the frame is attenuated. Therefore, the present embodiment can also obtain the same effects as those of the first and second embodiments.

< other embodiment >

While the first to third embodiments of the present disclosure have been described above, other embodiments are also conceivable in the present disclosure. For example as follows.

(1) In the first embodiment, the third member 103 is a cylindrical member that is continuous in the circumferential direction of the second member 102, but the third member 103 may be divided in the circumferential direction. Fig. 6 is a cross-sectional view showing a structure in which the vibration damping member 100D of this embodiment is cut by a plane perpendicular to the central axes of the first member 131 and the second member 132. In the damper member 100D, four third members 133 spaced apart in the circumferential direction of the second member 132 are sandwiched between the first member 131 and the second member 132. The number of the third members 133 is arbitrary, and may be two or three, or may be five or more. In this embodiment, the same effects as those of the first embodiment can be obtained. Further, according to this embodiment, by adjusting the number of the third members and the width of the second member 102 in the circumferential direction, the amount of shear deformation occurring in the third members can be adjusted, and the damping characteristics of the vibration of the housing can be adjusted.

(2) The third member 103 in the first embodiment may be divided in the direction along the central axis of the second member 102. Fig. 7 is a cross-sectional view showing a structure in which the vibration damping member 100E of this embodiment is cut by a plane including the center axes of the first member 141 and the second member 142. In the damper member 100E, three third members 143 spaced apart in the center axis direction of the second member 142 are sandwiched between the first member 141 and the second member 142. The number of the third members 143 is arbitrary, and two, four or more may be provided. In this embodiment, the same effect as that of fig. 6 can be obtained.

(3) The embodiment of fig. 6 or the embodiment of fig. 7 can also be applied to the second embodiment described above. That is, in fig. 4, the plate-like third member 113 is divided in the width direction of the first member 111 or the second member 112 (application of the embodiment of fig. 6), or divided in the length direction of the first member 111 or the second member 112 (application of the embodiment of fig. 7). In these embodiments, the same effects as those of the embodiment of fig. 6 or the embodiment of fig. 7 can be obtained.

(4) The telescopic vibration damping member may be configured by providing a length adjustment unit for adjusting the length of the vibration damping member on at least one of the first member and the second member. Fig. 8 and 9 are sectional views showing structural examples of the retractable vibration damping member.

The vibration damping member 100F shown in fig. 8 has a first member 151 and a second member 152 in the shape of a hollow cylinder with both ends open. Although not shown, similarly to the first embodiment, the end portion vicinity portion of the second member 152 is inserted into the end portion vicinity portion of the first member 151, and a third member made of rubber or the like is sandwiched between the inner wall surface of the end portion vicinity portion of the first member 151 and the outer wall surface of the end portion vicinity portion of the second member 152.

A cylindrical extension member 153 is inserted into an opening end of the first member 151 on the opposite side of the second member 152. A male screw 153a is formed on the outer peripheral surface of the extension member 153. On the other hand, a female screw 151a that engages with the male screw 153a is formed on the inner peripheral surface of the first member 151. An opening end of the second member 152 opposite to the first member 151 is inserted into an opening end of a cylindrical extension member 154. A female screw 154a is formed on the inner peripheral surface of the extension member 154. On the other hand, a male screw 152a that engages with the female screw 154a is formed on the outer peripheral surface of the second member 152. That is, in the embodiment shown in fig. 8, the female screw 151a, the extension member 153, and the male screw 153a thereof formed in the first member 151 constitute a first adjustment portion, and the male screw 152a, the extension member 154, and the female screw 154a thereof formed in the second member 152 constitute a second adjustment portion. According to this embodiment, the extension members 153 and 154 are rotated to adjust the protruding lengths of the extension members 153 and 154 with respect to the first members 151 and 152, thereby adjusting the overall length of the vibration damping member 100F. Therefore, according to this embodiment, the entire length of the vibration damping member 100F can be adjusted in accordance with the distance between the two opposing wall surfaces of the housing, and the vibration damping member 100F can be attached to the housing.

The vibration damping member 100G shown in fig. 9 includes a first member 161 and a second member 162 each having a hollow cylindrical shape. Although not shown, the structure of the connecting portion between the first member 161 and the second member 162 is the same as that of the first embodiment.

An end of the first member 161 opposite to the second member 162 is an open end, and a cylindrical extension member 163 having both closed ends is inserted into the open end. The hollow area in the first member 161 is blocked at its middle by the wall 161 a. A spring 161b is interposed between the closed end of the extension member 163 inserted from the open end of the first member 161 and the wall 161 a. On the other hand, the end of the second member 162 opposite to the first member 161 is a closed end, and the closed end is inserted into the open end of a cylindrical extension member 164 having one open end and the other closed end. A spring 162b is interposed between the closed end of the second member 162 and the closed end of the extension member 164. That is, in the embodiment shown in fig. 9, the extension member 163 inserted into the first member 161 and the spring 161a constitute a first adjustment portion, and the extension member 164 inserted into the second member 162 and the spring 162b constitute a second adjustment portion. According to this embodiment, the extension members 163 and 164 are pressed against the first member 161 and the second member 162, whereby the entire length of the vibration damping member 100G can be adjusted. Therefore, also in this embodiment, the same effect as that of the embodiment of fig. 8 can be obtained.

The mechanism for adjusting the overall length of the vibration damping member is not limited to a screw or a spring, and may be adjusted by oil, air, or the like. In fig. 8 and 9, the adjustment portions are provided in both the first member and the second member, but the adjustment portions may be provided in only one of the first member and the second member.

(5) In the first embodiment, at least one of the first member 101 and the second member 102 may be provided with an opening to function as a resonator. The damper member 100H shown in fig. 10 includes a first member 171 and a second member 172 having hollow cylindrical shapes, and a third member 173 connecting the first member 101 and the second member 172, as in the first embodiment. Here, the first member 171 is provided with an opening 171a that communicates the hollow region in the vibration damping member 100H with the hollow region in the housing 1. In the vibration damping member 100H, the hollow region inside thereof functions as a resonator, and thus the acoustic characteristics of the housing 1 can be adjusted. According to this embodiment, vibration suppression and adjustment of acoustic characteristics of the housing 1 can be performed by one vibration damping member 100H. In fig. 10, the opening 171a is provided in the first member 171, but may be provided in the second member 102. Alternatively, both the first member 171 and the second member 172 may be provided with openings. The number and position of the openings provided in the vibration damping member 100H are arbitrary, and may be appropriately determined according to the shape and size of the housing 1 and the desired acoustic characteristics

(6) In the first embodiment, the first member 101 and the second member 102 are cylindrical, but may be cylindrical other than a cylinder such as a square cylinder.

(7) In fig. 1, one damping member is provided between two opposing wall surfaces of the housing, but a plurality of damping members having different damping characteristics of vibration may be provided between the two wall surfaces. According to this aspect, a desired damping characteristic can be achieved by a combination of a plurality of vibration damping members.

(8) The vibration damping member according to the present disclosure can be applied not only to audio devices such as speakers and subwoofers but also to electronic musical instruments, audio equipment, in-vehicle audio devices, and the like that have a box-shaped housing and generate sound, such as portable keyboards.

Further, the present disclosure discloses a vibration damping member which is attached to the inside of a housing of an acoustic apparatus, and which includes a first member, a second member, and a third member, the first member and the second member being connected via the third member, the third member having a lower elastic modulus than the first member and the second member.

The first member and the second member may have a first opposing region and a second opposing region that face each other, respectively, and the third member may be disposed in a gap between the first opposing region and the second opposing region.

Further, the third member may be a viscoelastic body.

The damping member may be provided with a total length adjustment portion for adjusting the total length of the damping member, in at least one of the first member and the second member.

The first member and the second member may be cylindrical, the first member may have a hollow region into which the second member is inserted, and the third member may be sandwiched between an inner wall surface of the hollow region of the first member and an outer wall surface of the second member inserted into the hollow region.

Further, at least one of the first member and the second member may have an opening.

The first member and the second member may be plate bodies, and the third member may be sandwiched between the plate surface of the first member and the plate surface of the second member.

The first member may be in contact with one surface of the housing, and the second member may be in contact with a surface of the housing different from the one surface.

The first member and the second member may be in contact with the one surface and the different surface facing each other in the housing, respectively.

The first member may be in contact with one surface inside the housing, and the second member may be in contact with a surface different from the one surface.

The first member and the second member may be in contact with the one surface and the different surface facing each other in the housing, respectively.

In addition, the present disclosure discloses an acoustic apparatus including: a frame body; a speaker unit fixed to the housing; a vibration damping member mounted inside the housing; the frame body has a first wall and a second wall different from the first wall as walls defining the interior of the frame body, and the vibration damping member has: a first member abutting against the first wall; a second member abutting the second wall; and a third member that connects the first member and the second member and has a lower elastic modulus than the first member and the second member.

Alternatively, the first wall and the second wall may face each other.

The third member may connect the first member and the second member so as to allow a distance between the first wall with which the first member is in contact and the second wall with which the second member is in contact to be varied when the speaker unit is operated.

The third member may be a viscoelastic body.

The first member and the second member may be cylindrical, the first member may have a hollow region into which the second member is inserted, and the third member may be sandwiched between an inner wall surface of the hollow region of the first member and an outer wall surface of the second member inserted into the hollow region.

Description of the reference numerals

1 frame body

SP speaker unit

1L, 1R, 1F, 1B, 161a wall

100A, 100B, 100C, 100D, 100E, 100F, 100G vibration damping member

101. 111, 121, 131, 141, 151, 161 first part

102. 112, 122, 132, 142, 152, 162 second part

103. 113, 123, 133, 143 third part

153a, 152a external screw thread

151a, 154a internal thread

153. 154, 163, 164 extension member

161b, 162b spring