JP2007097070A - Structure for attaching speaker unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a diaphragm from being distorted or a voice coil position from being deviated by attaching a speaker unit. <P>SOLUTION: A waterproof sheet component is held between an opening edge of an opposite side member and a flange part of a speaker frame, and a speaker is fixed while compressing an elastic sheet component using a screw inserted, into the opposite side member, from a fastening part extending from the flange part to the outer periphery. In such a speaker unit attaching structure, the fastening part comprises a protruding portion protruded at a fastening surface side of a peripheral part of an attaching hole into which the screw is inserted. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a speaker unit mounting structure, and more particularly, a speaker unit mounting structure capable of preventing deformation of a speaker frame or a diaphragm or displacement of a voice coil due to mounting of the speaker unit. About.

  A conventional speaker unit mounting structure will be described with reference to FIGS. FIG. 7 is a schematic cross-sectional view (before fastening) showing a conventional speaker unit mounting structure. FIG. 8 is a schematic cross-sectional view (after fastening) showing a conventional speaker unit mounting structure. FIG. 9 is a schematic cross-sectional view showing the main part of another conventional speaker unit mounting structure, in which (a) a normal state and (b) an abnormal state.

  A speaker unit 11 includes a diaphragm 15, a voice coil bobbin 17, a damper 20, a speaker frame 30, a magnetic circuit unit 23, and the like as shown in FIG.

  The diaphragm 30 has a substantially conical cylindrical shape, and the inner peripheral edge of the small diameter portion of the conical cylinder is fixed near the tip of the voice coil bobbin 17, and the outer peripheral edge of the large diameter portion of the conical cylinder is made of an elastic member. The inner peripheral edge of the formed edge 19 is bonded, and the outer peripheral edge of the edge 19 is fixed to the front opening of the speaker frame 30.

  The damper 20 is an annular elastic body that uses a blended member or the like and has an annular cross-sectional shape, and the inner peripheral edge of the damper 20 is inserted into the voice coil bobbin 17 and is fixed substantially in the vicinity of the center. . The outer peripheral edge portion of the damper 20 is fixed to the damper fixing portion of the speaker frame 30 and elastically holds the voice coil bobbin 17.

  In the speaker frame 30, the portion holding the diaphragm 15 by the two elastic members of the edge 21 and the damper 20 has a shape close to a conical cylinder shape, and the terminal portion is fixed to the upper surface of the top plate of the magnetic circuit portion 23. ing. Therefore, the diaphragm 15 is held in a suspended state inside the speaker frame 30 by the two elastic members of the edge 19 and the damper 20. In addition, a cylindrical waterproof portion 31 is formed from the front opening so as to surround the outer side of the conical cylinder, a flange portion 32 is formed outward from the opening of the waterproof portion 31, and A plurality of attachment portions 33 (usually three places) extending from the outer peripheral edge portion are provided, and attachment holes 34 to the counterpart member are formed.

  Here, attachment of the speaker unit will be described.

  For example, when the speaker unit 11 is mounted inside the door of the vehicle, a waterproof measure for protecting the speaker unit 11 from water droplets is required as shown in FIG. Mounting of the mounting portion 33 extending from the outer peripheral edge portion of the flange portion 32 with the waterproof sheet 24 sandwiched between the opening edge portion of the door inner panel 25 and the opening edge portion of the flange portion 32 of the speaker frame 30 The speaker unit 11 is fixed while compressing the waterproof sheet 24 with a screw inserted through the hole 34 into the inner panel 25.

Prior art documents relating to the invention of this application include the following.
JP-A-10-76883

  In the speaker unit mounting structure described above, the waterproof sheet 24 is compressed to a predetermined thickness as shown in FIG. 8 when the speaker unit 11 is fastened, and the mounting portion 33 is inclined by the thickness of the compressed waterproof sheet 24. Since the speaker frame 30 is distorted, the speaker frame 30 and the diaphragm 15 are deformed and the position of the voice coil 18 is displaced as shown in FIG. Occurrence of the noise may cause poor speaker performance. Further, as an improvement measure of FIG. 8, there is a case where a rib 26 is provided at a height corresponding to the thickness of the compressed waterproof sheet 24 at the tip of the mounting portion 33 as shown in FIG. 9. Even in this case, the effect of improvement differs depending on the state of the mating mounting surface. For example, when the mounting surface is flat, it seems that there is an improvement effect. However, if there are irregularities or wavy undulations on the mounting surface, distortion occurs as in FIG. There is a possibility that the performance of the speaker may be deteriorated due to the generation of sound.

  Patent Document 1 is disclosed as a prior art document related to this case. The content is that the mounting seat for screwing is attached to the mounting surface of the ear part, which is not provided with sponge rubber, around the flange of the speaker at a height corresponding to the thickness of the compressed sponge rubber. It is formed for the purpose of reducing the cost of sponge rubber. However, when the state of the mating mounting surface (for example, unevenness or wavy undulation) is bad, distortion may occur in the fastening portion, which may adversely affect the inside of the speaker body.

  The present invention solves the above-described problem, and distortion generated when the speaker unit is attached to the counterpart member is absorbed by the fastening portion, and deformation of the speaker frame and the diaphragm or displacement of the voice coil occurs. It is an object of the present invention to provide a speaker unit mounting structure that can prevent the above-described problem.

  The present invention achieves the above-mentioned object. An elastic sheet component is sandwiched between the opening edge of the counterpart member and the flange portion of the speaker frame, and the counterpart from the fastening portion extending in the outer peripheral direction from the flange portion. In a speaker unit mounting structure in which a speaker is fixed while compressing the elastic sheet component by a fastening member inserted through a side member, the fastening portion is fastened to a fastening surface side of a peripheral portion of the mounting hole through which the fastening member is inserted. A strain absorbing means is provided.

  Further, the fastening strain absorbing means is characterized in that a protruding portion that protrudes from the fastening surface side so as to surround the attachment hole is integrally formed with the fastening portion.

  Further, the protruding portion is formed such that when a predetermined pressure is applied, the protruding portion is elastically deformed or partially collapsed.

  In addition, a concave portion is formed on the back side of the protruding portion so that the protruding portion is elastically deformed when a predetermined pressure is applied to the protruding portion.

  Further, the protrusion is a tongue-like protrusion and is integrally formed with the fastening portion.

  Further, the protruding portion is formed in contact with the counterpart member in a state where the elastic sheet component is compressed.

  The fastening strain absorbing means is a spacer formed of a sheet member having the same quality and the same thickness as the elastic sheet component.

  As described above, according to the present invention, the distortion generated in the fastening portion when the speaker unit is attached to the counterpart member is absorbed by the fastening portion, and the deformation of the speaker frame or the diaphragm or the displacement of the voice coil occurs. Can be prevented.

The present invention is a speaker unit in which a distortion generated in an attachment portion can be absorbed by the attachment portion when the speaker unit is fastened to a counterpart member. A part of application examples of the present invention will be described below with reference to FIGS.
(Embodiment 1)
Embodiment 1 of the present invention will be described with reference to FIG. 1, FIG. 2, and FIG. 1A and 1B are schematic views showing a speaker unit mounting structure according to Embodiment 1 of the present invention, in which FIG. 1A is a cross-sectional view, and FIG. 2A and 2B are enlarged views showing a mounting portion of the speaker unit according to the first embodiment, where FIG. 2A is a contact surface view, FIG. (D) It is BB sectional drawing. FIG. 3 is a contact surface enlarged view showing a mounting portion different from that in FIG. (E) It is a point-shaped protrusion part. The speaker unit of the present invention is substantially the same as the conventional speaker unit except for the components related to the mounting portion of the speaker frame, and has been described in the background art. The description will be omitted or simplified, and parts related to the invention will be mainly described.

  A speaker unit 10 includes a diaphragm 15, a voice coil 18, a damper 20, a speaker frame 30, a magnetic circuit unit 23, and the like as shown in FIG.

  The speaker frame 30 is a portion that holds the diaphragm 15 with two elastic members of the edge 19 and the damper 20, and has a shape close to a conical cylinder shape, and the terminal portion is fixed to the upper surface of the top plate of the magnetic circuit portion 23. Has been. In addition, a cylindrical waterproof portion 31 is formed from the front opening so as to surround the outer side of the conical cylinder, a flange portion 32 is formed outward from the opening of the waterproof portion 31, and A plurality of attachment portions 40 (usually three places) extending from the outer peripheral edge portion are provided, and attachment holes 41 to the counterpart member are formed. On the outer peripheral portion of the mounting hole 41 of the mounting portion 40, annular projecting portions 42 and 43 (corresponding to fastening strain absorbing means) projecting to the contact surface side to the mating member are formed. As shown in FIG. 2, the cross-sectional shape of the projecting portion 42 is a quadrangle or a triangle, and the height H of the projecting portions 42 and 43 is the thickness when a waterproof sheet 24 (corresponding to an elastic sheet component) described later is compressed. Formed slightly higher than the eyes. When a predetermined pressure is applied to the protrusions 42 and 43, the protrusions 42 and 43 are elastically deformed or partially collapsed.

  In addition, for example, the projecting portion 00 can be projected in a shape as shown in FIGS. (A) is a double circular protrusion 44 provided double on the outer periphery of the mounting hole 41, (b) is a rectangular protrusion 45 provided on the outer peripheral of the mounting hole 41, and (c) is an outer periphery of the mounting hole 41. U-shaped projections 46 provided so as to surround the part, (d) is a radial projection 47 provided radially on the outer periphery of the mounting hole 41, and (e) is provided on the outer periphery of the mounting hole 41 in a dot-like manner. This is a dot-shaped protrusion 48. Note that the cross-sectional shape of the protruding portion and the dimension of the height H in (a) to (d) are the same as those in FIG. However, with regard to the shape of the dot-shaped protruding portion 48 in (e), for example, protruding portions such as a cylinder, a cone, a prism, a pyramid, etc. are erected at necessary places, and the others are based on the description of FIG. .

  Next, attachment of the speaker unit will be described.

  For example, when the speaker unit 10 is mounted inside a door of a vehicle, as shown in FIG. 1, it is necessary to take a waterproof measure to protect the speaker unit 10 from water droplets. The waterproof sheet 24 is sandwiched between the opening edge of the flange portion 32 of the 30 and a screw inserted into the inner panel 25 from the mounting hole 41 of the mounting portion 40 extending from the outer peripheral edge of the flange portion 32. The speaker unit 10 is fixed while compressing.

  As described above, according to the speaker unit mounting structure of Embodiment 1 of the present invention, the annular protrusion 42 or 43 is formed on the outer peripheral portion of the mounting hole 41 of the mounting portion 40 of the speaker unit 10. When a predetermined pressure is applied to the protrusions 42 and 43, the protrusions 42 and 43 are elastically deformed or partially collapsed. Therefore, the height of the protrusions 42 and 43 is adjusted according to the compression state of the waterproof sheet 24. It also changes. Therefore, since the attachment part 40 can always maintain a parallel state with respect to the attachment surface, it is possible to prevent the occurrence of fastening distortion that leads to deformation of the speaker frame 30, and to absorb other distortions by the fastening part.

In the first embodiment of the present invention, the case of mounting inside the door of the vehicle has been described. However, the present invention is not limited to this, and between the mounting surface of the counterpart member and the flange portion 32 of the speaker unit 10 other than the waterproof purpose. For example, even when an elastic body part is provided and fastened for the purpose of vibration proofing and dust proofing, the present invention can be applied if the mounting structure is the same as that of the present invention.
(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIG. 4A and 4B are enlarged views showing a mounting portion of the speaker unit according to the second embodiment of the present invention, in which (a) is a contact surface view and (b) CC sectional view. In the second embodiment, a part of the first embodiment is changed, and the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  Reference numeral 40 denotes an attachment portion of the speaker unit 10, and an annular protrusion 50 is formed on the outer peripheral portion of the attachment hole 41 provided in the attachment portion 40 so as to protrude toward the contact surface. The shape is a quadrangle, and the height H of the protrusion 50 is formed to be approximately the same as the thickness of the waterproof sheet 24. An annular recess 51 having a U-shaped cross section is formed on the back side of the protrusion 50 so that the protrusion 50 is easily elastically deformed when a predetermined pressure is applied to the protrusion 50. Note that the pressure resistance of the protrusion 51 can be adjusted by changing the width and depth of the recess 51.

As described above, according to the speaker unit mounting structure of the second embodiment of the present invention, when a predetermined pressure is applied to the protrusion 50, the protrusion 50 sinks in the direction of the recess 51. The height H of the protrusion 50 also changes in accordance with the compressed state of the waterproof sheet 24. Therefore, as in the first embodiment, since the mounting portion 40 can be kept parallel to the mounting surface, it is possible to prevent the occurrence of fastening distortion that leads to deformation of the speaker frame 30, and to fasten other distortions as well. Can be absorbed in the part. In addition, a recess may be provided on the back side of the protruding portion described in the first embodiment as in the second embodiment.
(Embodiment 3)
A third embodiment of the present invention will be described with reference to FIG. FIG. 5 is an enlarged view showing a mounting portion of the speaker unit according to Embodiment 3 of the present invention, in which (a) is a contact surface view and (b) DD sectional view. In the third embodiment, a part of the first embodiment is changed, and the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  Reference numeral 40 denotes an attachment portion of the speaker unit 10, which is provided with a slit from the attachment hole 41 provided in the attachment portion 40 toward the outer peripheral direction, and a portion that is divided by the slit 54 protrudes toward the contact surface side. A protruding portion 53 is formed. When a predetermined pressure is applied to the tongue-like protrusion 53, the tongue-like protrusion 53 is elastically deformed, and the height H of the tongue-like protrusion 53 changes according to the compressed state of the waterproof sheet 24. Note that the pressure resistance of the tongue-like protruding portion 53 can be adjusted by changing the length, the protruding angle, the number of divisions, the thickness of the plate, and the like of the tongue-like protruding portion 53.

As described above, according to the mounting portion 40 of the speaker unit 10 according to the third embodiment of the present invention, the height H of the tongue-like protruding portion 53 is adjusted according to the compressed state of the waterproof sheet 24. Therefore, as in the first embodiment, the mounting portion 40 can always maintain a parallel state with respect to the mounting surface, so that it is possible to prevent the occurrence of fastening strain that leads to deformation of the speaker frame 30 and other strains. Can be absorbed by the fastening part.
(Embodiment 4)
A fourth embodiment of the present invention will be described with reference to FIG. 6A and 6B are schematic views showing a mounting portion of the speaker unit according to the fourth embodiment of the present invention. FIG. 6A is a sectional view of a fastening portion, FIG. 6B is an enlarged plan view of a spacer, and FIG. In the second embodiment, a part of the first embodiment is changed, and the same components as those in the first embodiment are denoted by the same reference numerals and the description thereof is omitted.

  55 is a spacer, and the material of the spacer 55 is the same as that of the waterproof sheet 24 (the same material and thickness dimension) are used and formed in an annular shape. When the speaker unit 10 is attached to the inner panel 25, the speaker unit 10 is provided between the inner panel 25 and the attachment portion 35 in order to compress the waterproof sheet 24 provided between the flange portion 32 and the inner panel 25. A screw is inserted through the spacer 55 and the waterproof sheet 24 and the spacer 55 are fastened while being compressed.

  As described above, since the spacer 55 formed of the same member as the waterproof sheet 24 is used in the fastening portion of the speaker unit 10 according to the fourth embodiment of the present invention, the spacer 55 and the waterproof sheet 24 Is compressed in parallel, so that the mounting portion 35 can always be kept parallel to the mounting surface of the inner panel 25 in the same manner as in the above-described embodiment. Generation | occurrence | production can be prevented and another distortion can also be absorbed in a fastening part.

  In addition, although the spacer 55 is used in the fourth embodiment, the present invention is not limited to this, and a part that can cope with the compression of the waterproof sheet 24, such as a disc spring, can also be used.

It is the schematic which shows the attachment structure of the speaker unit of Embodiment 1 of this invention. 3 is an enlarged view showing a mounting portion of the speaker unit according to Embodiment 1. FIG. FIG. 3 is a contact surface view enlarged view showing a mounting portion different from FIG. 2. It is an enlarged view which shows the attachment part of the speaker unit of Embodiment 2 of this invention. It is an enlarged view which shows the fastening attachment of the speaker unit of Embodiment 3 of this invention. It is the schematic which shows the attaching part of the speaker unit of Embodiment 4 of this invention. It is a schematic sectional drawing (before fastening) which shows the attachment structure of the conventional speaker unit. It is a schematic sectional drawing (after fastening) which shows the attachment structure of the conventional speaker unit. It is a schematic sectional drawing which shows the principal part of the attachment structure of another conventional speaker unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Speaker unit 15 ... Diaphragm 17 ... Voice coil bobbin 18 ... Voice coil 19 ... Edge 20 ... Damper 23 ... Circuit part 24 ... Waterproof sheet 25 ... Inner panel 30 ... Speaker frame 31 ... Waterproof part 32 ... Flange part 35, 40 ... Mounting part 41 ... Mounting hole 42, 43, 50 ... Projection part 44 ... Double Circular projection 45 ... Square projection 46 ... U-shaped projection 47 ... Radial projection 48 ... Point projection 51 ... Concavity 53 ... Tongue projection 54 ...・ Slit 55 ... Spacer

Claims (7)

An elastic sheet component is sandwiched between the opening edge portion of the counterpart member and the flange portion of the speaker frame, and the elastic sheet is inserted by a fastening member inserted into the counterpart member from a fastening portion extending in the outer peripheral direction from the flange portion. In the mounting structure of the speaker unit for fixing the speaker while compressing the parts,
The fastening structure of the speaker unit, wherein the fastening portion is provided with fastening strain absorbing means on a fastening surface side of a peripheral portion of the mounting hole through which the fastening member is inserted. 2. The speaker unit mounting structure according to claim 1, wherein the fastening strain absorbing means is formed integrally with the fastening portion with a projecting portion that projects from the fastening surface side so as to surround the mounting hole. 3. The speaker unit according to claim 1, wherein the protrusion is formed such that the protrusion is elastically deformed or partially collapsed when a predetermined pressure is applied. 4. Mounting structure. 4. The concave portion is formed on the back side of the protruding portion so that the protruding portion is elastically deformed when a predetermined pressure is applied to the protruding portion. The mounting structure of the speaker unit according to any one of the above. The speaker unit mounting structure according to claim 1, wherein the protrusion is a tongue-like protrusion and is integrally formed with the fastening portion. The speaker unit mounting structure according to any one of claims 1 to 5, wherein the protruding portion is in contact with the counterpart member in a state where the elastic sheet component is compressed. The speaker unit mounting structure according to claim 1, wherein the fastening strain absorbing means is a spacer formed of a sheet member having the same quality and the same thickness as the elastic sheet component.