Structure for reducing conduction abnormal sound of loudspeaker

Abstract

The utility model relates to the technical field of automobile safety, in particular to a structure for reducing conduction abnormal sound of a horn, which comprises a decorative cover, the decorative cover is provided with a wall body, a cavity with an opening at the bottom is enclosed by the wall body, a supporting plate assembly is clamped and matched at the opening of the cavity, the supporting plate assembly comprises a supporting plate, and a conducting strip is arranged on the bottom surface of the supporting plate. Pin mounting holes are formed in the bottom surface of the supporting plate at intervals; a fixed pin is fixed on the steering wheel opposite to the pin mounting hole, the fixed pin is sleeved with a spring wire bracket, and a conductive spring wire is arranged between the spring wire brackets; the supporting plate is arranged on the fixing pin in a sliding and sleeving mode through the pin mounting hole, the fixing pin is sleeved with a straight cylinder spring, and the straight cylinder spring abuts against the position between the pin mounting hole and the spring wire support. When the decorative cover is pressed, the conducting strip and the conducting spring wire realize line-line cross contact; the utility model has the advantages of simple structure, low cost and wide application, is not easy to cause dislocation, and can avoid the problems of spatial layout and contact dislocation caused by increasing the area of the salient points in different product structures, and is simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile safety, in particular to a structure for reducing abnormal sound when a speaker is turned on. Background Art

[0002] As consumers' requirements for car comfort gradually increase, car manufacturers have invested a lot of R&D costs in improving car NVH. At present, when the car engine is working, the vibration will be transmitted to other parts, causing local vibration, so that most cars will have more or less steering wheel shaking problems in various working conditions such as idling, high speed and bad roads, which will cause abnormal noise when the horn is turned on.

[0003] Traditional horns are mostly connected by overlapping the metal surface on the steering wheel with the independent metal conductive sheet on the metal tray that carries the driver's airbag, and by adding contact bumps on the metal conductive sheet to reduce the contact area, the abnormal noise caused by the horn conduction during driving is reduced. At present, most cars use the convex point contact method to reduce the abnormal noise of conduction, but the point contact area is relatively small, and it is easy to cause point contact displacement under special working conditions. In addition, the corresponding conductive sheet tray is mostly a metal structure, which is easy to vibrate and produce alternative abnormal noises at certain points. Based on this, some convex points need to increase the contact area, which leads to limitations in the spatial layout of different product structures, and correspondingly increases production costs, limiting applications. Utility Model Content

[0004] In view of the above problems, an embodiment of the utility model provides a structure for reducing abnormal sound caused by speaker conduction.

[0005] The utility model embodiment provides a structure for reducing abnormal sound caused by speaker conduction, including a decorative cover, the decorative cover having a wall, the wall enclosing a cavity with an opening at the bottom, a support plate assembly snap-fitted at the cavity opening, the support plate assembly including a support plate snap-fitted with the wall, a conductive sheet is provided on the bottom surface of the support plate, and pin mounting holes are provided at intervals on one side of the bottom surface of the support plate along the conductive sheet; a fixing pin is fixed on the steering wheel relative to the pin mounting hole, a spring wire bracket is sleeved on the fixing pin, and conductive spring wires are provided between the spring wire brackets; the support plate is slidably sleeved on the fixing pin through the pin mounting hole, a straight spring is also sleeved on the fixing pin, and the straight spring is abutted between the pin mounting hole and the spring wire bracket; when the decorative cover is pressed, the conductive sheet on the support plate assembly is driven to approach the conductive spring wire and achieve line-to-line cross contact with the conductive spring wire.

[0006] Compared with the prior art, the beneficial effects of the utility model are: when the horn needs to be sounded, the driver presses the decorative cover, and the operating pressing force is transmitted to the support plate assembly through the decorative cover, and the support plate assembly drives the conductive sheet to move toward the conductive spring wire, while compressing the straight-tube spring, and finally realizes line-to-line cross-contact dotting with the conductive spring wire; after the pressing force is removed, the support plate assembly together with the decorative cover returns to its original position under the action of the straight-tube spring; the use of line-to-line cross-contact dotting is not easy to cause dislocation, and can avoid the spatial layout problem and contact malposition problem caused by the increase of the convex point area due to different product structures, and has a simple structure and low cost, which is conducive to wide application.

[0007] Optionally, a base is provided on the bottom surface of the support plate, and the conductive sheet and the base are hot-fused into an integrated structure.

[0008] Optionally, the conductive sheet has a door-shaped structure, including positioning holes at both ends, linear contacts protruding toward the conductive spring wire near the positioning holes, and a first speaker connection interface in the middle.

[0009] Optionally, a retaining spring groove is provided on the side wall of the pin mounting hole, a retaining spring is clamped between each retaining spring groove, a sliding groove is provided on the fixed pin, and after the pin mounting hole is sleeved on the fixed pin, the retaining spring is clamped into the sliding groove.

[0010] Optionally, a fixing groove is further provided on the fixing pin, and the fixing pin is positioned on the shock-absorbing pad through the fixing groove and a limiting gasket, and the shock-absorbing pad is fixed on the steering wheel.

[0011] Optionally, the conductive spring wire and the spring wire bracket are injection molded as one piece.

[0012] Optionally, a hook is provided on the pin mounting hole, and a buckle is provided on the spring wire bracket to cooperate with the hook to realize sliding limitation. The spring wire bracket is also provided with a punched hole, and the conductive spring wire passes through the punched hole radially so as to bulge toward the linear contact on one side of the conductive sheet. A second speaker connection interface is provided at one end of the spring wire bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of the present application, and do not constitute a limitation of the present invention. In the drawings:

[0014] Figure 1 A three-dimensional diagram of a structure for reducing abnormal sound during speaker conduction provided by an embodiment of the utility model;

[0015] Figure 2 An exploded view of a structure for reducing abnormal sound during speaker conduction provided by an embodiment of the utility model;

[0016] Figure 3 A structural schematic diagram of a decorative cover provided by an embodiment of the utility model;

[0017] Figure 4 A structural schematic diagram of a support plate provided in an embodiment of the utility model;

[0018] Figure 5 A schematic diagram of the structure of a conductive sheet provided in an embodiment of the utility model;

[0019] Figure 6 A schematic diagram of the structure of a spring wire support part provided by an embodiment of the utility model;

[0020] Figure 7 A schematic diagram of the structure of a positioning pin provided in an embodiment of the utility model;

[0021] Figure 8 It is a cross-sectional view at the line-line intersection state.

[0022] Among them, the decorative cover 1, the wall 2, the hook 3, the hole 4, the support plate 5, the conductive sheet 6, the pin mounting hole 7, the fixing pin 8, the spring wire bracket 9, the conductive spring wire 10, the straight spring 11, the base 12, the positioning hole 13, the linear contact 14, the first speaker connection interface 15, the retaining spring groove 16, the retaining spring 17, the sliding groove 18, the fixing groove 19, the hook 20, the buckle 21, the dotted hole 22, the second speaker connection interface 23, and the limit gasket 24. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with the implementation mode and the accompanying drawings. Here, the schematic implementation mode of the utility model and its description are used to explain the utility model, but are not used as a limitation of the utility model.

[0024] See also Figure 1-Figure 8 The utility model provides a structure for reducing abnormal sound of speaker conduction, including a decorative cover 1, the decorative cover 1 has a wall 2, the wall 2 encloses a cavity with a bottom opening, an air bag is embedded in the cavity, and a support plate assembly is snap-fitted at the cavity opening. The two can be snap-fitted and fixed by a hook 3 provided on the support plate assembly and a snap hole 4 provided on the decorative cover 1; the support plate assembly includes a support plate 5 snap-fitted with the wall 2, a conductive sheet 6 is provided on the bottom surface of the support plate 5, and pin installation holes are arranged at intervals on one side of the bottom surface of the support plate 5 along the conductive sheet 6. Mounting hole 7; a fixing pin 8 is fixed on the steering wheel relative to the pin mounting hole 7, a spring wire bracket 9 is sleeved on the fixing pin 8, and a conductive spring wire 10 is arranged between the spring wire brackets 9; the support plate 5 is slidably sleeved on the fixing pin 8 through the pin mounting hole 7, and a straight spring 11 is also sleeved on the fixing pin 8, and the straight spring 11 is against between the pin mounting hole 7 and the spring wire bracket 9; when the decorative cover 1 is pressed, the conductive sheet 6 on the support plate assembly is driven to approach the conductive spring wire 10 and realize line-to-line cross contact with the conductive spring wire 10.

[0025] In practice, the bottom surface of the support plate 5 is provided with a base 12, and the conductive sheet 6 is thermally fused with the base 12 to form an integrated structure. The support plate 5 wraps the conductive sheet 6 and has a strong noise absorption property.

[0026] The conductive sheet 6 is a door-shaped structure, including positioning holes 13 at both ends, linear contacts 14 protruding toward the conductive spring wire 10 are arranged near the positioning holes 13, and a first speaker connection interface 15 is arranged in the middle.

[0027] A retaining spring groove 16 is provided on the side wall of the pin mounting hole 7 , and a retaining spring 17 is clamped between each retaining spring groove 16 . A sliding groove 18 is provided on the fixing pin 8 . After the pin mounting hole 7 is sleeved on the fixing pin 8 , the retaining spring 17 is clamped into the sliding groove 18 .

[0028] The fixing pin 8 is also provided with a fixing groove 19 , and the fixing pin 8 is positioned on the shock absorbing pad through the fixing groove 19 and the limiting gasket 24 , and the shock absorbing pad is fixed on the steering wheel.

[0029] The conductive spring wire 10 and the spring wire bracket 9 are integrally formed by injection molding, and the spring wire bracket 9 wraps the conductive spring wire 10 to also enhance the noise absorption.

[0030] A hook 20 is provided on the pin mounting hole 7, and a buckle 21 is provided on the spring wire bracket 9 to cooperate with the hook 20 to realize sliding limitation. A dotted hole 22 is also provided on the spring wire bracket 9, and the conductive spring wire 10 passes through the dotted hole 22 along the radial direction so as to convex toward the linear contact point 14 on one side of the conductive sheet 6. A second speaker connection interface 23 is provided at one end of the spring wire bracket 9.

[0031] In practice, the number of fixing pins 8, the position and quantity of linear contacts 14 can be set as required. The key is to use line-to-line intersection contact points between the conductive sheet 6 and the conductive spring wire 10, and to use an injection-molded integrated structure for noise absorption.

[0032] In practice, when the horn needs to be sounded, the driver presses the decorative cover 1, and the operating pressing force is transmitted to the support plate 5 through the decorative cover 1. The support plate 5 drives the linear contact 14 on the conductive sheet 6 to move toward the conductive spring wire 10, and compresses the straight spring 11 at the same time. Finally, the linear contact 14 and the conductive spring wire 10 realize line-to-line cross contact and point making, such as Figure 8 As shown; after the pressing force is removed, the conductive sheet 6 on the support plate 5 together with the decorative cover 1 returns to the original position under the action of the straight spring 11; the line-to-line cross-contact dotting is adopted, which is not easy to be misaligned, and can avoid the spatial layout problem and contact misalignment problem caused by the increase of the convex point area due to different product structures. The structure is simple, the cost is low, and it is conducive to wide application.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A structure for reducing abnormal sound during speaker conduction, comprising a decorative cover, the decorative cover having a wall, the wall enclosing a cavity with an opening at the bottom, a support plate assembly being snap-fitted at the cavity opening, characterized in that: The support plate assembly includes a support plate clamped with the wall, a conductive sheet is arranged on the bottom surface of the support plate, and pin mounting holes are arranged at intervals on one side of the bottom surface of the support plate along the conductive sheet; a fixing pin is fixed on the steering wheel relative to the pin mounting hole, a spring wire bracket is sleeved on the fixing pin, and a conductive spring wire is arranged between the spring wire brackets; the support plate is slidably sleeved on the fixing pin through the pin mounting hole, a straight spring is also sleeved on the fixing pin, and the straight spring is abutted between the pin mounting hole and the spring wire bracket; when the decorative cover is pressed, the conductive sheet on the support plate assembly is driven to approach the conductive spring wire and realize line-to-line cross contact with the conductive spring wire.

2. The structure for reducing abnormal sound during speaker conduction according to claim 1, characterized in that: A base is arranged on the bottom surface of the supporting plate, and the conductive sheet and the base are thermally melted into an integrated structure.

3. The structure for reducing abnormal sound during speaker conduction as claimed in claim 2, characterized in that: The conductive sheet is of a door-shaped structure, including positioning holes at both ends, linear contacts protruding toward the conductive spring wire near the positioning holes, and a first speaker connection interface in the middle.

4. The structure for reducing abnormal sound during speaker conduction as claimed in claim 1, characterized in that: A retaining spring groove is arranged on the side wall of the pin installation hole, and a retaining spring is arranged between each retaining spring groove. A sliding groove is arranged on the fixed pin, and the retaining spring is inserted into the sliding groove after the pin installation hole is sleeved on the fixed pin.

5. The structure for reducing abnormal sound during speaker conduction as claimed in claim 4, characterized in that: A fixing groove is also provided on the fixing pin, and the fixing pin is positioned on the shock-absorbing pad through the fixing groove and the limiting gasket, and the shock-absorbing pad is fixed on the steering wheel.

6. The structure for reducing abnormal speaker conduction noise according to claim 1, characterized in that: The conductive spring wire and the spring wire bracket are injection molded as one body.

7. The structure for reducing abnormal sound during speaker conduction as claimed in claim 3, characterized in that: A hook is arranged on the pin mounting hole, and a buckle is arranged on the spring wire bracket to cooperate with the hook to realize sliding limitation. A dotted hole is also arranged on the spring wire bracket, and the conductive spring wire passes through the dotted hole radially so as to bulge toward the linear contact on one side of the conductive sheet. A second speaker connection interface is arranged at one end of the spring wire bracket.

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