Buffer type press-fit assembly jig

Abstract

The utility model discloses a buffer type press-fit assembly jig, which relates to the technical field of earphone production and comprises a base and a pressing plate, the top end of the base is connected with a boss, limiting grooves are arranged in the base and the boss, lifting seats and springs are arranged in the grooves, and the springs are abutted between the limiting grooves and the lifting seats. First and second positioning pins and screws are fixed in the limiting grooves, and the lifting seat is correspondingly provided with a limiting channel to realize stable sliding. A third positioning pin is arranged on the upper portion of the lifting seat. The pressing plate is provided with an avoiding hole matched with the third positioning pin. During use, all the components are sequentially placed on the boss, the press machine pushes the pressing plate to press downwards, the spring contracts to buffer impact force, the lifting base moves downwards stably, and all the components of the earmuff are accurately bonded. According to the jig, through spring buffering and accurate positioning, downward pressing impact force is effectively reduced, earmuff parts are prevented from being damaged, the earmuff assembling quality and production efficiency are improved, and the defective rate is reduced.

Description

Technical Field

[0001] This utility model relates to the field of headphone manufacturing technology, specifically a buffer-type pressing and assembly fixture. Background Technology

[0002] Currently, the common assembly method for earmuffs is to use double-sided adhesive to bond the three components together. This method is simple to operate and provides a strong bond, effectively ensuring the stability of the connection between the earmuff components. However, during assembly, a certain amount of downward pressure needs to be applied to ensure the double-sided adhesive fully bonds the components and guarantees a strong bond.

[0003] However, in existing technologies, the fixtures used during assembly cannot effectively reduce the impact force generated during the pressing process. When the press applies downward pressure to the various components of the earcup through the fixture, due to the lack of an effective cushioning mechanism, the impact force acts directly on the earcup's foam, plastic parts, and PORON foam. These components are usually quite soft and are easily deformed or damaged by excessive impact. For example, the foam may be over-compressed, leading to a decrease in its elasticity and affecting the earcup's wearing comfort; plastic parts may crack or break, affecting the earcup's structural strength and appearance; and PORON foam may also shift or deform due to the impact, affecting the earcup's sound insulation performance. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a buffer-type pressing assembly fixture, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a buffer-type pressing assembly fixture, including a base and a pressure plate, wherein a boss is connected to the top of the base, and a limiting groove is provided inside the base and the boss. A lifting seat and a spring are provided inside the limiting groove, and the spring abuts between the limiting groove and the lifting seat. When the lifting seat is pressed down by the pressure plate, the spring contracts.

[0006] Furthermore, the limiting groove is fixed with a first positioning pin, a second positioning pin, and a screw respectively. The lifting seat is provided with a first limiting channel, a second limiting channel, and a third limiting channel along the axial direction. The second positioning pin, the screw, and the first positioning pin are respectively inserted into the first limiting channel, the second limiting channel, and the third limiting channel, and can all slide relative to the lifting seat.

[0007] Furthermore, both the second and third limiting channels have stepped grooves inside. The stepped grooves of the second and third limiting channels are in opposite directions. The spring is sleeved outside the first positioning pin, and the upper end of the spring abuts against the stepped groove of the second limiting channel. The top of the screw abuts against the stepped groove of the second limiting channel.

[0008] Furthermore, a third positioning pin is installed on the upper part of the lifting seat, and an avoidance hole is opened inside the pressure plate, which is located directly above the third positioning pin.

[0009] Furthermore, the third positioning pin is installed on the upper part of the lifting seat by means of threaded connection or snap-fit, and the top of the third positioning pin has a conical structure, which facilitates precise positioning with the clearance hole of the pressure plate.

[0010] Furthermore, the diameter of the clearance hole is greater than the diameter of the third positioning pin, and the depth of the clearance hole is greater than the maximum depth to which the third positioning pin enters the clearance hole when the pressure plate is pressed down, so as to ensure that the pressure plate can be pressed down smoothly.

[0011] Furthermore, the spring is a compression spring made of stainless steel to ensure its elasticity and corrosion resistance.

[0012] This invention provides a buffer-type pressing assembly fixture. Compared with the prior art, it has the following advantages:

[0013] This cushioned pressing assembly fixture, through its spring-buffered structure and precise positioning guide design, effectively reduces the impact force when pressing down on the foam, plastic parts, and PORON foam of the earcups. This prevents deformation and damage to the earcup components due to excessive impact, greatly improving the quality and yield of earcup assembly, reducing the defect rate in the production process, and thus saving production costs and improving economic efficiency for enterprises. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the disassembled structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the lifting seat in this utility model;

[0016] Figure 3 This is a schematic diagram of the first cross-section of the present invention after assembly;

[0017] Figure 4 This is a schematic diagram of the second cross-section of the present invention after assembly;

[0018] Figure 5 This is a disassembled schematic diagram of the sponge, plastic parts, foam, and double-sided tape assembled in this utility model;

[0019] Figure 6 for Figure 5 A half-section view.

[0020] In the diagram: 1. Base; 2. Boss; 21. Limiting groove; 3. Lifting seat; 31. First limiting channel; 32. Second limiting channel; 33. Third limiting channel; 34. Step groove; 4. First positioning pin; 5. Spring; 6. Second positioning pin; 7. Screw; 8. Third positioning pin; 9. Pressure plate; 91. Clearance hole; 10. Sponge; 11. Lower double-sided adhesive; 12. Plastic part; 13. Upper double-sided adhesive; 14. Foam. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: a buffer-type pressing assembly fixture, including a base 1 and a pressure plate 9. A boss 2 is tightly connected to the top of the base 1, and a limiting groove 21 is provided inside both the base 1 and the boss 2. A lifting seat 3 and a spring 5 are installed inside the limiting groove 21. The spring 5 abuts against the bottom of the limiting groove 21 and between the lifting seat 3. When the lifting seat 3 is pressed down by the pressure plate 9, the spring 5 will contract.

[0023] The first positioning pin 4, the second positioning pin 6, and the screw 7 are fixed inside the limiting groove 21. The lifting seat 3 has a first limiting channel 31, a second limiting channel 32, and a third limiting channel 33 respectively opened along the axial direction inside. The second positioning pin 6, the screw 7, and the first positioning pin 4 are correspondingly inserted into the first limiting channel 31, the second limiting channel 32, and the third limiting channel 33, so that the second positioning pin 6, the screw 7, and the first positioning pin 4 can slide relative to the lifting seat 3, thereby ensuring that the lifting seat 3 moves stably up and down within the limiting groove 21.

[0024] Both the second limiting channel 32 and the third limiting channel 33 have stepped grooves 34 inside, and the stepped grooves 34 of the second limiting channel 32 and the third limiting channel 33 are oriented in opposite directions. The spring 5 is sleeved on the outside of the first positioning pin 4, and the upper end of the spring 5 abuts against the stepped groove 34 of the second limiting channel 32. The top of the screw 7 abuts against the stepped groove 34 of the second limiting channel 32. This design ensures that the spring 5 maintains a relatively stable force direction during compression and recovery, preventing the lifting seat 3 from shifting.

[0025] The upper part of the lifting seat 3 is equipped with a third positioning pin 8, and the inside of the pressure plate 9 has a clearance hole 91, which is located directly above the third positioning pin 8. When the pressure plate 9 is pressed down, the third positioning pin 8 can enter the clearance hole 91, which serves to position and guide the device.

[0026] In actual use, first install base 1 on the worktable of the press, ensuring that base 1 is stable and level. Then install pressure plate 9 on the lifting spindle of the press, and adjust the position of pressure plate 9 so that it can press down accurately.

[0027] Please see Figure 5-6 During assembly, first place the sponge 10 on the boss 2, ensuring the sponge 10 is accurately positioned and flat. Then, attach the lower layer of double-sided adhesive 11 (with release paper removed) to the upper surface of the sponge 10, ensuring a tight fit without air bubbles. Next, place the plastic part 12 on top of the lower layer of double-sided adhesive 11, ensuring alignment. Then, place the upper layer of double-sided adhesive 13 (with release paper removed) into the pre-drilled annular groove on the upper surface of the plastic part 12, ensuring accurate positioning. Finally, place the foam 14 on top of the upper layer of double-sided adhesive 13. At this point, all components are complete.

[0028] After placement, the press is started, and the lifting spindle of the press pushes the pressure plate 9 downward. When the pressure plate 9 contacts the foam 14, it continues to press down based on the downward pressure of the foam 14. At this time, the lifting seat 3 is subjected to the downward pressure of the pressure plate 9, the spring 5 begins to contract, and the lifting seat 3 moves downward along the direction of the first positioning pin 4, the second positioning pin 6, and the screw 7, achieving a cushioning effect. After moving to the correct position, the sponge 10, the plastic part 12, and the foam 14 are bonded together by the lower double-sided adhesive 11 and the upper double-sided adhesive 13 to form a complete assembly.

[0029] Subsequently, the lifting spindle of the press raises the height of the pressure plate 9, separating it from the assembled product. At this point, the operator can remove the assembled product.

Claims

1. A buffer-type pressing assembly fixture, comprising a base (1) and a pressure plate (9), characterized in that: The top of the base (1) is connected to the boss (2). The base (1) and the boss (2) are provided with a limiting groove (21). The limiting groove (21) is provided with a lifting seat (3) and a spring (5). The spring (5) abuts between the limiting groove (21) and the lifting seat (3). When the lifting seat (3) is pressed down by the pressure plate (9), the spring (5) contracts.

2. The press-fit assembly jig of claim 1, wherein, The first positioning pin (4), the second positioning pin (6) and the screw (7) are fixed inside the limiting groove (21). The first limiting channel (31), the second limiting channel (32) and the third limiting channel (33) are respectively opened in the lifting seat (3) along the axial direction. The second positioning pin (6), the screw (7) and the first positioning pin (4) are respectively inserted into the first limiting channel (31), the second limiting channel (32) and the third limiting channel (33), and can all slide relative to the lifting seat (3).

3. The cushioning compression assembly jig of claim 2, wherein, The second limiting channel (32) and the third limiting channel (33) are both provided with stepped grooves (34). The stepped grooves (34) of the second limiting channel (32) and the stepped grooves (34) of the third limiting channel (33) are in opposite directions. The spring (5) is sleeved on the outside of the first positioning pin (4), and the upper end of the spring (5) abuts against the stepped groove (34) of the second limiting channel (32). The top of the screw (7) abuts against the stepped groove (34) of the second limiting channel (32).

4. The cushioning compression assembly fixture of claim 1, wherein, The upper part of the lifting seat (3) is equipped with a third positioning pin (8), and the inside of the pressure plate (9) is provided with a clearance hole (91), which is located directly above the third positioning pin (8).

5. A buffer-type pressing assembly fixture according to claim 4, characterized in that, The third positioning pin (8) is installed on the upper part of the lifting seat (3) by means of threaded connection or snap-fit, and the top of the third positioning pin (8) is a conical structure, which facilitates precise positioning with the clearance hole (91) of the pressure plate (9).

6. A buffer-type pressing assembly fixture according to claim 4, characterized in that, The diameter of the clearance hole (91) is greater than the diameter of the third positioning pin (8), and the depth of the clearance hole (91) is greater than the maximum depth to which the third positioning pin (8) enters the clearance hole (91) when the pressure plate (9) is pressed down, so as to ensure that the pressure plate (9) can be pressed down smoothly.

7. A buffer-type pressing assembly fixture according to claim 1, characterized in that, The spring (5) is a compression spring made of stainless steel to ensure its elasticity and corrosion resistance.

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