A screwless mounting structure to prevent PCB noise

Abstract

This application discloses a screwless mounting structure for preventing abnormal noise from PCBs, relating to the field of PCB mounting. It includes a lower housing and an upper housing detachably mounted to the lower housing. A circuit board is mounted inside both the upper and lower housings. Several positioning plates are fixed to both the upper and lower housings, respectively abutting against both sides of the circuit board. Each positioning plate includes a rigid portion and an elastic portion. The rigid portion is fixed to the upper or lower housing, and the elastic portion is mounted to the rigid portion, abutting against the circuit board and deforming according to the circuit board's movement. This application effectively reduces the probability of circuit board vibration due to equipment vibration.

Description

Technical Field

[0001] This application relates to the field of PCB mounting, and in particular to a screwless mounting structure for preventing abnormal noise from PCBs. Background Technology

[0002] PCB, or Printed Circuit Board, is a key component in the electronics industry. It is not only the support for electronic components, but also the carrier for realizing the electrical connection between them, which is equivalent to the "neural network" and "skeleton" of electronic products.

[0003] Existing PBCs are usually installed inside a housing, which is then installed on the device. The PBC inside the housing is connected to the electronic components on the device via a data cable. When the PBC is installed on some devices that vibrate significantly during use, the vibration generated by the device can easily cause the PCB to shake and produce abnormal noises, or even cause the PCB to be damaged due to impact from the shaking. Summary of the Invention

[0004] To reduce the probability of circuit board vibration caused by equipment vibration, this application provides a screwless mounting structure to prevent abnormal noise from the PCB.

[0005] The screwless mounting structure for preventing abnormal noise from PCBs provided in this application adopts the following technical solution:

[0006] A screwless mounting structure for preventing abnormal noise from a PCB includes a lower housing and an upper housing detachably mounted on the lower housing. A circuit board is installed inside the upper and lower housings. Several positioning plates are fixed on both the upper and lower housings. The positioning plates of the upper and lower housings respectively abut against both sides of the circuit board. Each positioning plate includes a rigid part and an elastic part. The rigid part is fixed to the upper or lower housing, and the elastic part is mounted on the rigid part. The elastic part abuts against the circuit board and deforms according to the circuit board.

[0007] By adopting the above technical solution, the circuit board is abutted by the elastic part, and the abutting deformation of the elastic part can reduce the probability of the circuit board shaking due to the vibration of the equipment. At the same time, the elastic part can absorb part of the abutting force through deformation, thereby reducing the probability of damage to the circuit board or positioning plate caused by rigid contact between the positioning plate and the circuit board.

[0008] Preferably, the circuit board has a plurality of positioning holes in its circumference, and the positioning plate deforms and inserts into the positioning holes when it abuts against the positioning holes on the circuit board.

[0009] By adopting the above technical solution, the positioning plate can improve the fixing strength of the circuit board between the upper and lower housings by deforming and inserting into the positioning hole, and reduce the probability of the circuit board falling off due to external force after installation.

[0010] Preferably, the elastic part is integrally molded and mounted on the rigid part.

[0011] By adopting the above technical solution, the integrally formed rigid and elastic parts are not easily separated by external forces, thereby ensuring the structural strength of the positioning plate.

[0012] Preferably, the elastic part is detachably mounted on the rigid part.

[0013] By adopting the above technical solution, the detachable design of the rigid part and the elastic part allows for easy replacement of the elastic part after it loses its elasticity, ensuring the normal use of the positioning plate.

[0014] Preferably, a disassembly and assembly mechanism is provided between the rigid part and the elastic part. The disassembly and assembly mechanism includes an insertion slot and a disassembly and assembly block. The disassembly and assembly slot is opened in the rigid part, and the disassembly and assembly block is fixed in the elastic part. The disassembly and assembly block can be detachably inserted into the disassembly and assembly slot.

[0015] By adopting the above technical solution, the disassembly and assembly mechanism can facilitate the disassembly and assembly of the elastic part on the rigid part.

[0016] Preferably, the side wall of the disassembly slot is provided with a reinforcing slot, and a reinforcing block is fixed on the disassembly block. The reinforcing block is inserted into the reinforcing slot by deformation.

[0017] By adopting the above technical solution, the reinforcement slot and reinforcement block can improve the installation strength of the elastic part on the rigid part.

[0018] Preferably, the bottom of the disassembly slot is provided with a debris discharge hole, which connects to the reinforcement slot.

[0019] By adopting the above technical solution, the impurity discharge hole can discharge the broken reinforcing block in the reinforcing slot, thereby reducing the impact of the broken reinforcing block on the replacement of the elastic part.

[0020] Preferably, a stop is slidably disposed on the rigid part, and the stop opens or closes the impurity discharge hole by sliding.

[0021] By adopting the above technical solution, the setting of the baffle can reduce the probability of debris entering and clogging the discharge hole.

[0022] Preferably, the elastic part is sleeved outside the rigid part, and a drive rod is slidably disposed on the rigid part. The drive rod slides out of the rigid part to drive the stop block to open the impurity discharge hole. When the elastic part is sleeved on the rigid part, the elastic part drives the sliding rod to slide and be housed inside the rigid part, and the drive stop block closes the impurity discharge hole.

[0023] By adopting the above technical solution, the drive rod can be set to facilitate the drive of the stop block, and at the same time, the installation strength of the elastic part can be improved.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The circuit board is abutted by the elastic part, and the deformation of the elastic part can reduce the probability of the circuit board shaking due to the vibration of the equipment. At the same time, the elastic part can absorb part of the abutting force through deformation, thereby reducing the probability of damage to the circuit board or positioning plate caused by rigid contact between the positioning plate and the circuit board.

[0026] 2. When the positioning plate abuts against the positioning hole on the circuit board, it deforms and inserts into the positioning hole. The positioning plate can improve the fixing strength of the circuit board between the upper and lower housings by deforming and inserting into the positioning hole, and reduce the probability of the circuit board falling off due to external force after installation.

[0027] 3. The integrally molded rigid and elastic parts are not easily separated by external forces, thus ensuring the structural strength of the positioning plate;

[0028] 4. The disassembly and assembly block can be detachably inserted into the disassembly and assembly slot. The disassembly and assembly mechanism facilitates the disassembly and assembly of the elastic part onto the rigid part.

[0029] 5. The design of the vent hole can discharge the broken disassembly inserts and reinforcement blocks in the reinforcement slot, thereby reducing the impact of the broken disassembly inserts and reinforcement blocks remaining in the reinforcement slot on the replacement of the elastic part. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0031] Figure 2 This is a schematic diagram of the cross-sectional structure of Embodiment 1 of this application;

[0032] Figure 3 This is a cross-sectional view of the positioning plate in Embodiment 2 of this application;

[0033] Reference numerals: 1. Lower housing; 2. Upper housing; 3. Circuit board; 4. Positioning plate; 41. Rigid part; 42. Elastic part; 5. Positioning hole; 6. Disassembly and assembly mechanism; 61. Insertion slot; 62. Disassembly and assembly block; 7. Reinforcing block; 8. Reinforcing groove; 9. Impurity discharge hole; 10. Stop block; 11. Drive rod; 12. Wedge block. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0035] Example 1:

[0036] This application discloses a screwless mounting structure for preventing abnormal noise from a PCB, referring to... Figure 1 and Figure 2 The device includes a lower housing 1 and an upper housing 2 detachably mounted on the lower housing 1. A circuit board 3 is installed inside the upper housing 2 and the lower housing 1. Several positioning plates 4 are fixed on both the upper housing 2 and the lower housing 1. The positioning plates 4 are evenly distributed along the edge of the circuit board 3. The positioning plates 4 of the upper housing 2 and the lower housing 1 abut against both sides of the circuit board 3. The positioning plate 4 includes a rigid part 41 and an elastic part 42. The rigid part 41 is fixed to the upper housing 2 or the lower housing 1, and the elastic part 42 is installed on the rigid part 41. In this embodiment, the elastic part 42 is made of rubber with deformation capability. The elastic part 42 abuts against the circuit board 3 and deforms according to the circuit board 3. The elastic part 42 abuts against the circuit board 3. The abutting deformation of the elastic part 42 can reduce the probability of the circuit board 3 shaking due to the vibration of the equipment. At the same time, the setting of the elastic part 42 can absorb part of the abutting force through deformation, thereby reducing the probability of damage to the circuit board 3 or the positioning plate 4 due to the rigid abutting between the positioning plate 4 and the circuit board 3.

[0037] Reference Figure 1 and Figure 2 The circuit board 3 has several positioning holes 5 around its circumference. When the positioning plate 4 abuts against the positioning hole 5 on the circuit board 3, it deforms and inserts into the positioning hole 5. The positioning plate 4 can improve the fixing strength of the circuit board 3 between the upper shell 2 and the lower shell 1 by deforming and inserting into the positioning hole 5, and reduce the probability of the circuit board 3 falling off due to external force after installation.

[0038] Reference Figure 1 and Figure 2 The elastic part 42 is integrally molded and installed on the rigid part 41. In this embodiment, both the upper shell 2 and the lower shell 1 are made of plastic, and the rigid part 41 of the positioning plate 4 is also made of plastic. During production, it is formed by pouring molten plastic masterbatch into a mold. In this embodiment, after the rigid part 41 is poured, molten rubber raw material is poured into the mold so that the elastic part 42 is integrally molded and installed on the rigid part 41. The integrally molded rigid part 41 and elastic part 42 are not easily separated by external force, thereby ensuring the structural strength of the positioning plate 4.

[0039] The implementation principle of this application embodiment is as follows: the circuit board 3 is installed in the lower housing 1, and then the upper housing 2 is installed on the lower housing 1. The positioning plate 4 on the lower housing 1 and the upper housing 2 abuts against the circuit board 3. The circuit board 3 is fixed by the deformation of the elastic part 42. At the same time, the elastic part 42 can absorb the impact force when the equipment vibrates, reducing the probability of the circuit board 3 shaking.

[0040] Example 2:

[0041] The difference between this embodiment and embodiment 1 is that the connection method between the elastic part 42 and the rigid part 41 in this embodiment is different from that in embodiment 1.

[0042] Reference Figure 3 The elastic part 42 is detachably mounted on the rigid part 41. A disassembly and assembly mechanism 6 is provided between the rigid part 41 and the elastic part 42. The disassembly and assembly mechanism 6 includes an insertion slot 61 and a disassembly and assembly block 62. The disassembly and assembly slot is opened in the rigid part 41, and the disassembly and assembly block 62 is fixed in the elastic part 42. The disassembly and assembly block 62 is integrally formed with the elastic part 42, and the material is the same as that of the elastic part 42, which is made of rubber with deformation capability. The disassembly and assembly block 62 can be detachably inserted into the disassembly and assembly slot. The disassembly and assembly mechanism 6 can facilitate the disassembly and assembly of the elastic part 42 on the rigid part 41.

[0043] Reference Figure 3 The side wall of the disassembly slot is provided with a reinforcing slot 8, and a reinforcing block 7 is fixed on the disassembly insert 62. The reinforcing block 7 and the disassembly insert 62 are integrally formed and are made of the same material as the disassembly insert 62, which is rubber with deformation capability. The reinforcing block 7 is inserted into the reinforcing slot 8 through deformation. The reinforcing slot 8 and the reinforcing block 7 can improve the installation strength of the elastic part 42 on the rigid part 41.

[0044] Reference Figure 3The bottom of the disassembly slot is provided with a vent hole 9, which connects to the reinforcement slot. When disassembling the elastic part 42, the disassembly insert 62 is easily pulled and broken due to the contact between the reinforcement clip 7 and the reinforcement slot 8. The vent hole 9 can discharge the disassembly insert 62 and the reinforcement clip 7 that are broken in the reinforcement slot 8, thereby reducing the impact of the disassembly insert 62 and the reinforcement clip 7 remaining in the reinforcement slot 8 due to breakage on the replacement of the elastic part 42; the rigid part 41 slides upwards. A stop block 10 is provided, which opens or closes the discharge hole 9 by sliding. The stop block 10 reduces the probability of debris entering and clogging the discharge hole 9. An opening spring 13 is provided between the stop block 10 and the rigid part 41. The elastic force of the opening spring 13 drives the stop block 10 to slide and open the discharge hole 9. An elastic part 42 is sleeved on the rigid part 41. A drive rod 11 is slidably provided on the rigid part 41. The drive rod 11 slides out of the rigid part 41 and drives the stop block 10. When the discharge hole 9 is opened, the drive rod 11 extends to the stop block 10. A wedge block 12 is fixed on the stop block 10. The drive rod 11 abuts against the wedge-shaped surface of the wedge block 12. When the elastic part 42 is fitted onto the rigid part 41, the elastic part 42 drives the sliding rod to slide and be housed inside the rigid part 41. When the drive rod 11 slides and is housed inside the rigid part 41, it drives the stop block 10 to close the discharge hole 9 through the wedge block 12. The installation of the elastic part 42 is achieved by the drive rod 11 cooperating with the wedge block 12. When the discharge hole 9 is closed, it reduces the entry of debris and prevents blockage of the discharge hole 9. When the elastic part 42 needs to be replaced, the removal of the elastic part 42 allows the stop block 10 to slide down under the action of the opening spring 13 to open the discharge hole 9, thereby facilitating the discharge of the broken reinforcing block 7. After the elastic part 42 is installed, the drive rod 11 can slide against the elastic part 42 to drive the elastic part 42 to produce a slight deformation, thereby reinforcing the installation of the elastic part 42.

[0045] The implementation principle of this application embodiment is as follows: the elastic part 42 is installed on the rigid part 41 of the upper housing 2 and the lower housing 1, the circuit board 3 is installed in the lower housing 1, and then the upper housing 2 is installed on the lower housing 1. The positioning plate 4 on the lower housing 1 and the upper housing 2 abuts against the circuit board 3. The circuit board 3 is fixed by the deformation of the elastic part 42 against the circuit board 3. At the same time, the elastic part 42 can absorb the impact force when the equipment vibrates, reducing the probability of the circuit board 3 shaking. When the elastic part 42 weakens after long-term use, it can be replaced to continue to be used.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A screwless mounting structure for preventing abnormal noise from a PCB, comprising a lower housing (1) and an upper housing (2) detachably mounted on the lower housing (1), wherein a circuit board (3) is mounted inside the upper housing (2) and the lower housing (1), characterized in that: Several positioning plates (4) are fixed on the upper shell (2) and the lower shell (1). The positioning plates (4) of the upper shell (2) and the lower shell (1) respectively abut against the two sides of the circuit board (3). The positioning plate (4) includes a rigid part (41) and an elastic part (42). The rigid part (41) is fixed on the upper shell (2) or the lower shell (1). The elastic part (42) is installed on the rigid part (41). The elastic part (42) abuts against the circuit board (3) and deforms according to the circuit board (3).

2. The screwless mounting structure for preventing abnormal noise on a PCB according to claim 1, characterized in that: The circuit board (3) has several positioning holes (5) circumferentially. When the positioning plate (4) abuts against the positioning holes (5) on the circuit board (3), it deforms and inserts into the positioning holes (5).

3. The screwless mounting structure for preventing abnormal noise on a PCB according to claim 2, characterized in that: The elastic part (42) is integrally molded and installed on the rigid part (41).

4. The screwless mounting structure for preventing abnormal noise on a PCB according to claim 2, characterized in that: The elastic part (42) is detachably mounted on the rigid part (41).

5. A screwless mounting structure for preventing abnormal noise on a PCB according to claim 4, characterized in that: A disassembly and assembly mechanism (6) is provided between the rigid part (41) and the elastic part (42). The disassembly and assembly mechanism (6) includes an insertion slot (61) and a disassembly and assembly block (62). The disassembly and assembly slot is opened in the rigid part (41), and the disassembly and assembly block (62) is fixed in the elastic part (42). The disassembly and assembly block (62) can be disassembled and inserted into the disassembly and assembly slot.

6. The screwless mounting structure for preventing abnormal noise on a PCB according to claim 5, characterized in that: The side wall of the disassembly slot is provided with a reinforcing slot (8), and a reinforcing block (7) is fixed on the disassembly insert (62). The reinforcing block (7) is inserted into the reinforcing slot (8) by deformation.

7. A screwless mounting structure for preventing abnormal noise on a PCB according to claim 6, characterized in that: The bottom of the disassembly slot is provided with a drainage hole (9), which is connected to the reinforcement slot.

8. A screwless mounting structure for preventing abnormal noise on a PCB according to claim 7, characterized in that: A stop (10) is slidably disposed on the hard part (41), and the stop (10) opens or closes the impurity discharge hole (9) by sliding.

9. A screwless mounting structure for preventing abnormal noise on a PCB according to claim 8, characterized in that: The elastic part (42) is sleeved on the hard part (41). A drive rod (11) is slidably provided on the hard part (41). The drive rod (11) slides out of the hard part (41) and drives the stop block (10) to open the discharge hole (9). When the elastic part (42) is sleeved on the hard part (41), the elastic part (42) drives the sliding rod to slide and be stored in the hard part (41), and the drive stop block (10) closes the discharge hole (9).

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