Micro suede fabric punching equipment for ceiling hidden microphone

Abstract

The utility model discloses a suede fabric punching device for a ceiling hidden microphone, which comprises a punch, a stamping knife base and a clamp, the diameter of the punch is 1.5-2.5 mm, the stamping knife base is provided with a circular through hole, after the clamp fixes a suede fabric, the punch passes through the suede fabric and enters the circular through hole on the stamping knife base, and the suede fabric is punched into the circular through hole on the stamping knife base. Sound receiving through holes are formed in the suede fabric layer. According to the micro suede fabric punching device, micro suede fabric is punched in a shearing mode through size matching between the punch and the round through hole in the stamping knife base, sound receiving through holes formed in the micro suede fabric are free of edge burrs, the forming quality is good, the precision is high, and the micro suede fabric punching device can be comparable with laser punching quality.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle body structure technology, and in particular relates to a perforation device for a suede-like fabric used for a concealed microphone in the roof. Background Technology

[0002] With increasing demands for vehicle voice transmission and sound quality, many car models now incorporate multiple microphones in the headliner to deliver and capture clear voice information, aiming to provide a premium and comfortable intelligent interior experience. Existing headliners are typically constructed by bonding a base material layer and a fabric layer. The base material is usually made of plastic, while the fabric layer, for aesthetic reasons, is increasingly being made of suede-like material. To allow the microphones to capture sound through multiple apertures, apertures are first created in the base material layer based on the microphone's placement. Then, after bonding the fabric layer to the base material layer, corresponding apertures are created in the fabric layer at the locations of the apertures.

[0003] To ensure that the sound-receiving holes in the suede-like fabric layer meet the requirements for size and sound reception, laser drilling technology is generally used to drill holes in the suede-like fabric layer of the ceiling. However, the high cost of laser drilling equipment limits its application. Summary of the Invention

[0004] To address the deficiencies and shortcomings of the existing technology, this utility model provides a perforation device for suede-like fabric used in ceiling-mounted concealed microphones. The device uses a conventional shearing and punching method to perforate the suede-like fabric layer, thus solving the technical problem of high investment costs associated with the need for laser perforation equipment.

[0005] The technical solution of this utility model is:

[0006] A perforation device for suede-like fabric used in ceiling-mounted concealed microphones includes a punch, a punch base, and a clamp. The punch has a diameter of 1.5–2.5 mm. The punch base has a circular through hole. The clamp is used to fix the suede-like fabric to the punch base. After the punch passes through the suede-like fabric and enters the circular through hole on the punch base, it forms a sound-receiving through hole on the suede-like fabric layer. The diameter of the circular through hole on the punch base is 1–2 mm larger than the diameter of the punch.

[0007] Furthermore, the punch is bullet-shaped with a hemispherical and cylindrical shape. The front end of the punch is hemispherical, and the rear support part of the punch is cylindrical. The diameter of the hemispherical part is 1.5 to 2.5 mm.

[0008] Furthermore, the circular through holes are arranged in a quincunx pattern on the punch base, and the punches corresponding to each circular through hole are also arranged in a quincunx pattern.

[0009] Furthermore, the drilling device also includes a limiting block, which is used to position the relative positions of the ceiling and the punch.

[0010] Furthermore, the drilling equipment also includes a cylinder, which is used to drive the punch to move towards the punch base.

[0011] Furthermore, a waste box is provided below the circular through hole on the punch base.

[0012] Furthermore, the imitation suede fabric can be either woven imitation suede fabric or microfiber imitation suede fabric.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. This utility model, through the design of a perforation device for imitation suede fabric, uses the dimensional matching between the punch and the circular through hole on the punch base to perforate the imitation suede fabric by shearing, saving the investment in laser perforation equipment and reducing production costs.

[0015] 2. This utility model achieves a sound-absorbing through hole formed on the imitation suede fabric layer without edge burrs through the dimensional matching between the punch and the circular through hole on the punch base. The forming quality is good and the precision is high, comparable to the quality of laser drilling.

[0016] 3. The circular through holes on the punch base of this utility model can be arranged in a plum blossom shape according to the shape of the sound-receiving through holes, and the punches can also be arranged in a plum blossom shape. Thus, plum blossom-shaped sound-receiving through holes can be formed in one step on the imitation suede fabric layer. This not only meets the appearance requirements of the sound-receiving through holes, but also saves working time compared to the operation process of drilling holes one by one required by laser drilling.

[0017] 4. The punching equipment of this utility model can be equipped with multiple punches, punch bases and clamps according to the position of the sound-receiving through holes, and punch holes in the entire suede-like fabric layer of the ceiling at the same time, which further improves production efficiency. In addition, the punching equipment of this utility model can arbitrarily adjust the position of the punches, punch bases and clamps according to the hole position, and can be used for punching ceilings of different specifications, realizing flexible production. Attached Figure Description

[0018] The disclosure of this utility model will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are merely illustrative of the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model.

[0019] Figure 1 This is an overall layout diagram of the perforation device for the suede-like fabric used in the ceiling-mounted concealed microphone of this utility model.

[0020] Figure 2 This is a partial view of the punch and punch base of this utility model.

[0021] Figure 3This is a diagram illustrating the drilling process of the drilling device of this utility model.

[0022] Figure 4 This is a front view of the shape of the punch of this utility model.

[0023] Figure 5 Diagrams showing the sound-receiving through holes obtained using different drilling methods.

[0024] In the diagram, 1 is the punch guide post, 2 is the circular through hole on the punch base, and 3 is the waste box; 5-1 is the sound-collecting through hole after shearing and punching the fabric-type imitation suede fabric layer, where the dimensions of the punch and the circular through hole on the punch base are not specifically specified; 5-2 is the sound-collecting through hole after chopping and punching the fabric-type imitation suede fabric layer; 5-3 is the sound-collecting through hole after shearing and punching the microfiber imitation suede fabric layer, where the diameter difference between the punch and the circular through hole on the punch base is 1-2 mils; and 5-4 is the sound-collecting through hole after chopping and punching the microfiber imitation suede fabric layer. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0026] Figure 1 This is an overall layout diagram of a perforation device for a ceiling-mounted concealed microphone made of suede-like fabric. It includes a flip base, a limiting block, a clamping device, a cylinder, a punch, a punch base, and a waste bin. The flip base and flip block are used to place the ceiling and achieve a 180° rotation of the ceiling. The limiting block is used to position the ceiling so that the punch is aligned with the location where a sound-absorbing hole needs to be punched in the suede-like fabric layer. The clamping device is used to fix the ceiling, facilitating punching. The cylinder pushes the punch towards the punch base, and with the cooperation of the punch and punch base, a sound-absorbing hole is punched in the suede-like fabric layer.

[0027] Figure 2This is a partial view of the punch and punch base of this utility model. The view includes a punch guide post 1, a circular through hole 2 on the punch base, and a waste box 3. A layer of imitation suede fabric is placed between the punch guide post 1 and the punch base and fixed with a clamp. The punch guide post 1 is equipped with a punch with a diameter of 1.5–2.5 mm. After penetrating the imitation suede fabric layer and entering the circular through hole on the punch base, the punch forms a sound-absorbing through hole in the imitation suede fabric layer. The diameter of the circular through hole on the punch base is 1–2 mm larger than the diameter of the punch. A waste box 3 is located below the circular through hole 2 to collect the imitation suede fabric that falls during punching, facilitating subsequent centralized processing and maintaining the cleanliness of the production line.

[0028] Figure 3 This is a diagram illustrating the drilling process of the drilling device of this utility model. Figure 3 This allows for a clearer understanding of the drilling process and equipment structure of this utility model. The sound-receiving through holes in the ceiling are generally arranged in a quincunx pattern; therefore, in this embodiment, the circular through holes on the punch base and the punches on the punch guide post are also arranged in a quincunx pattern. The diameter of the sound-receiving through holes is 1.5–2.5 mm, therefore the corresponding punch diameter is also machined to 1.5–2.5 mm, and the punch shape is a bullet-shaped form combining a hemispherical and cylindrical shape. The diameter of the circular through hole on the punch base corresponding to each punch is 1–2 micrometers larger than the diameter of the punch. The shape of the punch is as follows... Figure 4 As shown, the punch is bullet-shaped, consisting of a hemispherical and cylindrical section. The front end of the punch is hemispherical, and the rear support is cylindrical. A faux suede fabric layer is laid on the punch base, and then a clamp is used to fix the faux suede fabric layer in place. The punch guide post is inserted into the through hole above the clamp, through which the punch on the punch guide post can be aligned with the circular through hole on the punch base. Finally, an impact force is applied to the punch guide post, causing it to move towards the punch base. After the punch passes through the faux suede fabric layer and the circular through hole on the punch base, a plum blossom-shaped arrangement of sound-receiving through holes is formed on the faux suede fabric layer.

[0029] Comparative Example

[0030] This invention uses a shearing method to punch holes in imitation suede fabric. By combining the size matching between the punch and the circular through hole on the punch base—a diameter difference of 1 to 2 filaments—smooth, burr-free sound-absorbing through holes can be punched in the imitation suede fabric layer. Figure 5The figures illustrate sound-collecting through-holes obtained through different punching methods. Figure 5-3 shows the sound-collecting through-hole after shearing and punching a microfiber imitation suede fabric layer, using the circular through-hole dimensions of the punching and punching base specified in this invention, with a diameter difference of 1-2 microns. Compared to the sound-collecting through-hole after shearing and punching a fabric-type imitation suede fabric layer without specific specifications for the punching and punching base dimensions in Figure 5-1, the sound-collecting through-hole after chopping and punching a fabric-type imitation suede fabric layer in Figure 5-2, and the sound-collecting through-hole after chopping and punching a microfiber imitation suede fabric layer in Figure 5-4, it can be seen that using the shearing method and size difference control of this invention, the edges of the sound-collecting through-holes on the microfiber imitation suede fabric layer are smoother and burr-free.

[0031] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the inventive concept, and all such substitutions or modifications should be considered within the scope of protection of the present invention.

Claims

1. A perforation device for suede-like fabric used in ceiling-mounted concealed microphones, comprising a punch, a punch base, and a clamp, characterized in that, The diameter of the punch is 1.5 to 2.5 mm. The punch base has a circular through hole. The clamp is used to fix the imitation suede fabric on the punch base. After the punch passes through the imitation suede fabric and enters the circular through hole on the punch base, it forms a sound-absorbing through hole on the imitation suede fabric. The diameter of the circular through hole on the punch base is 1-2 mm larger than the diameter of the punch.

2. The perforation device for suede-like fabric used in a ceiling-mounted concealed microphone according to claim 1, characterized in that, The punch is bullet-shaped with a hemispherical and cylindrical shape. The front end of the punch is hemispherical, and the rear support part of the punch is cylindrical. The diameter of the hemispherical part is 1.5 to 2.5 mm.

3. The perforation device for suede-like fabric used in ceiling-mounted concealed microphones according to claim 1, characterized in that, The circular through holes are arranged in a plum blossom pattern on the punch base, and the punches corresponding to each circular through hole are also arranged in a plum blossom pattern.

4. The perforation device for suede-like fabric used in ceiling-mounted concealed microphones according to claim 1, characterized in that, The drilling device also includes a limiting block, which is used to position the relative positions of the ceiling and the punch.

5. The perforation device for suede-like fabric used in a ceiling-mounted concealed microphone according to claim 1, characterized in that, The drilling equipment also includes a cylinder, which is used to drive the punch to move towards the punch base.

6. The perforation device for suede-like fabric used in a ceiling-mounted concealed microphone according to claim 1, characterized in that, A waste box is also provided below the circular through hole on the punch base.

7. The perforation device for suede-like fabric used in a ceiling-mounted concealed microphone according to claim 1, characterized in that, The faux suede fabric can be either woven faux suede fabric or microfiber faux suede fabric.

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