Printed circuit board buckle installation structure and frequency converter

Abstract

The utility model discloses a printed circuit board buckle installation structure and a frequency converter, and relates to the electronic equipment assembly field, the printed circuit board buckle installation structure comprises a pedestal, a printed circuit board and a position limiting member, two sides of the pedestal are provided with a first clamping groove and a second clamping groove, and an installation surface is provided with a position limiting hole and a dismounting channel; a first elastic clamping part is arranged in the middle of the limiting piece, and a second elastic clamping part is arranged at the tail end of the limiting piece. The printed circuit board is inserted into the first clamping groove and is slidably mounted on the base; the limiting piece is inserted into the second clamping groove, the limiting piece is pushed in a sliding mode to enable the first elastic clamping part to be buckled with the limiting hole, meanwhile, the second elastic clamping part clamps the base, and bidirectional locking is achieved through the synergistic effect of the first elastic clamping part and the second elastic clamping part. The first elastic clamping part is ejected open through a dismounting tool inserted from the dismounting channel, so that the first elastic clamping part is released from the limiting hole, and the printed circuit board is dismounted.

Description

Technical Field

[0001] The utility model relates to the field of electronic equipment assembly, and particularly relates to a snap - on installation structure for a printed circuit board and an inverter. Background Art

[0002] In electronic equipment such as inverters, a printed circuit board, i.e., a PCB board, usually needs to be fixed inside the electronic equipment. Traditional fixing methods mostly use screw connections, which have problems such as inconvenient installation and disassembly, cumbersome operation and low efficiency, and difficult control of insulation spacing. Although there are also some snap - type fixing structures in the prior art, for example: elastic snaps are provided on the fixing parts, and when installing the printed circuit board, the elastic snaps are pressed down forcefully to complete the assembly of the printed circuit board. Such snap structures have the following deficiencies:

[0003] 1. Poor stability after installation, easy to loosen in a vibrating environment;

[0004] 2. Lack of effective guiding and limiting mechanisms, resulting in difficult installation and disassembly;

[0005] 3. Short stroke of the elastic snap, excessive force applied during installation and disassembly, easy to damage;

[0006] 4. Unable to remedy after the snap breaks, resulting in scrapping of the entire part.

[0007] Therefore, there is an urgent need for a snap - on installation structure for a printed circuit board with a simple structure, convenient installation and disassembly, and high reliability. Summary of the Utility Model

[0008] To solve the above - mentioned problems, the utility model provides a snap - on installation structure for a printed circuit board and an inverter, which realizes the rapid installation and disassembly of the printed circuit board through a two - way locking and guiding design, and at the same time ensures the stability after installation.

[0009] To achieve the above purpose, in the first aspect, the utility model provides a snap - on installation structure for a printed circuit board, including: a base, a printed circuit board, and a limiting member. The printed circuit board and the limiting member are installed on the base, and the limiting member is located behind the printed circuit board. Specifically, the base is provided with a first guiding structure for installing the printed circuit board and a second guiding structure for installing the limiting member, and a limiting hole is also provided on the base surface. The end of the limiting member is provided with a limiting flange for restricting the displacement of the printed circuit board; the middle part is provided with a first elastic clamping portion for cooperating with the limiting hole of the base; the end is provided with a second elastic clamping portion for forming a clamping connection with the bottom of the base.

[0010] When specifically implementing the snap - in mounting structure of the printed circuit board, after the printed circuit board is mounted to a predetermined position on the base along the first guiding structure, the limiting member is advanced to the working position along the second guiding structure. At this time, the limiting flange abuts against the printed circuit board, the first elastic clamping portion engages with the limiting hole, and the second elastic clamping portion clamps the bottom surface of the base, achieving two - way locking through the coordinated action of the first elastic clamping portion and the second elastic clamping portion.

[0011] A disassembly channel is also provided behind the limiting hole of the base for disassembling the first elastic clamping portion. The axis of the disassembly channel coincides with the movement track of the first elastic clamping portion. An external separation force can, through the disassembly channel, disengage the first elastic clamping portion from the locking of the limiting hole, thus completing the preliminary disassembly of the limiting member.

[0012] When specifically setting the base, the first guiding structure is set as a first slot with a C - shaped cross - section for accommodating the edge portion of the printed circuit board. A certain gap should be set between the slot width of the first slot and the board thickness of the printed circuit board to ensure no interference and vertical displacement during the movement of the printed circuit board. During installation, the printed circuit board is inserted into the first slot and pushed linearly along the slot direction to be mounted on the base. To facilitate the insertion of the printed circuit board into the first slot along the slot opening, a guiding surface is set at the slot - entry position of the first slot, and the guiding surface can be set as a guiding inclined surface or a guiding arc surface.

[0013] The above - mentioned second guiding structure is set as a second slot with a C - shaped cross - section for mounting the limiting member. The first slot and the second slot are arranged in parallel, and the first slot is located above the second slot.

[0014] When specifically setting the limiting member, bosses can be set on one side or both sides of the limiting member. The thickness of the bosses should be matched with the gap of the second slot to ensure no vertical displacement during the horizontal movement of the limiting member. To facilitate the insertion of the limiting member into the second slot along the slot opening, a guiding inclined surface is set at the end of the boss close to the second slot.

[0015] The first elastic clamping portion of the limiting member is set as a hook - type cantilever snap. The cross - section of the cantilever can be set as a common rectangle, and the elastic clamping portion is a hook claw. The movement track of the hook claw is perpendicular to the movement track of the printed circuit board. The snap needs to have sufficient holding strength. When the hook claw is in a free state, the holding surface angle β of the hook - type cantilever snap can be set to 90°.

[0016] The above - mentioned second elastic clamping portion is set as a hook - type straight - arm snap. The elastic clamping portion is a hook claw, and the hook claw is in the same direction as the advancing direction of the limiting member. The cross - section of the straight arm can also be set as a common rectangle. When the hook claw is in a free state, the holding surface angle β of the hook - type straight - arm snap is set such that 35° ≤ β ≤ 45°.

[0017] When the limiting member is installed, the first elastic clamping portion is pushed to the position of the limiting hole, and the hook claw is engaged with the limiting hole to complete the locking in the vertical direction. At the same time, the hook claw of the second elastic clamping portion clamps the bottom surface of the base to complete the locking in the horizontal direction.

[0018] In a second aspect, the present utility model further provides an inverter, which adopts the printed circuit board snap-in mounting structure described above, wherein the base is located inside the inverter housing. The installation form of the base inside the inverter and the type of the printed circuit board are not specifically limited.

[0019] Compared with the prior art, the present utility model has the characteristics of simple structure, convenient installation and disassembly, and stable installation. Description of the Drawings

[0020] The present utility model will be further described in detail below with reference to the drawings:

[0021] Figure 1 is a schematic diagram of a printed circuit board snap-in mounting structure;

[0022] Figure 2 is an exploded schematic diagram of a printed circuit board snap-in mounting structure;

[0023] Figure 3 is a schematic diagram of the limiting member in a printed circuit board snap-in mounting structure;

[0024] Figure 4 is a schematic diagram of disassembling the first elastic buckle in a printed circuit board snap-in mounting structure. Detailed Embodiment

[0025] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0026] As Figures 1 to 2 shown, the present utility model provides a printed circuit board snap-in mounting structure, including: a base 1, a printed circuit board 2, and a limiting member 3. The printed circuit board 2 and the limiting member 3 are installed on the base 1, and the limiting member 3 is located behind the printed circuit board 2. Electronic components are soldered on the printed circuit board 2, and the device soldering feet are on the back of the printed circuit board 2. During installation, the device soldering feet need to be avoided.

[0027] Specifically, during implementation, as Figure 2As shown, the base 1 is provided with a first guiding structure for installing the printed circuit board 2 and a second guiding structure for installing the limiting member 3. In this embodiment, the first guiding structure and the second guiding structure adopt a slot structure and are respectively arranged on both sides of the base 1. The first guiding structure is set as the first slot 12, and its cross-section is a C-shaped cross-section, which is used to accommodate the edge part of the printed circuit board 2. During installation, the printed circuit board 2 is inserted into the first slot 12 and linearly slides inward along the slot direction to be installed on the base 1. A certain gap should be set between the slot width of the first slot 12 and the board thickness of the printed circuit board 2 to ensure that there is no interference and vertical displacement when the printed circuit board 2 moves. To facilitate the insertion of the printed circuit board 2 into the slot along the slot opening, a guiding surface is set at the slot entrance position of the first slot 12, and this guiding surface can be a guiding inclined surface or a guiding arc surface.

[0028] The second guiding structure is set as the second slot 13, and its cross-section is a C-shaped cross-section. It is a guiding mechanism for the linear sliding of the limiting member 3, which is used to install the limiting member 3 and also limit the upward movement of the limiting member 3. The first slot 12 and the second slot 13 are arranged in parallel, and the first slot 12 is located above the second slot 13.

[0029] During specific implementation, as Figure 3 shown, when implementing the installation structure of the printed circuit board and the limiting member, at the end of the limiting member 3, at the part where the limiting member 3 abuts against the printed circuit board 2, the limiting member 3 is provided with a limiting flange 31 for restricting the displacement of the printed circuit board 2. When the limiting flange 31 abuts against the printed circuit board 2, it can prevent the printed circuit board 2 from generating backward displacement.

[0030] Bosses 34 are arranged on one side or both sides of the limiting member 3 as the guiding mechanism of the limiting member 3, which is used to guide the limiting member 3 to be pushed into the second slot 13 and linearly slide along the second slot 13 until it abuts against the printed circuit board 2. Specifically, the thickness of the boss 34 is set to match the gap of the second slot 13 to ensure that there is no vertical displacement when the second buckle 33 moves horizontally. To facilitate the pushing of the limiting member 3 into the slot along the slot opening of the second slot 13, a guiding inclined surface is set at one end of the boss 34 close to the second slot 13.

[0031] A first elastic clamping portion 32 is arranged at the middle position of the limiting member 3 for restricting the displacement of the limiting member 3. The first elastic clamping portion 32 is set as a hook-shaped cantilever beam buckle, and the movement track of its hook claw is perpendicular to the movement track of the printed circuit board 2. The buckle needs to have sufficient holding strength. When the hook claw is in a free state, the holding surface angle β of the hook-shaped cantilever buckle can be set to 90°.

[0032] The cross-section of the cantilever of the first elastic clamping portion 32 can be set as a common rectangle, which is simple to manufacture and has low cost, or a ⊥-type structure, etc. The present utility model does not make specific restrictions.

[0033] At the end of the limiting member 3, a second elastic clamping portion 33 is provided for forming a clamping connection with the bottom of the base 1. The second elastic clamping portion 33 is set as a hook-shaped straight-arm buckle, and is provided with a claw in the same direction as the advancing direction of the limiting member 3. The cross-section of the straight arm can also be set as a common rectangle, and the present utility model does not make specific restrictions. When the claw is in a free state, the angle β of the holding surface of the hook-shaped straight-arm buckle is set to 35° ≤ β ≤ 45°.

[0034] During specific implementation, a limiting hole 11 is provided on the base 1, located in the middle part between the two side slots. The limiting hole 11 is used to cooperate with the first elastic clamping portion 32. The size of the limiting hole 11 should be larger than the size of the elastic clamping portion of the first elastic clamping portion 32 to ensure that there is no interference when the elastic clamping portion undergoes elastic deformation.

[0035] On the base 1, a disassembly channel 14 is also provided, located behind the limiting hole 11, mainly used for disassembling the first elastic clamping portion 32. The axis of the disassembly channel 14 coincides with the movement trajectory of the first elastic clamping portion 32. An external separating force can, through the disassembly channel 14, cause the first elastic clamping portion 32 to disengage from the locking of the limiting hole 11, thereby completing the preliminary disassembly of the limiting member 3.

[0036] When implementing the printed circuit board clamping installation structure, first insert the printed circuit board 2 into the first slots 12 on both sides of the base 1, and then push the printed circuit board 2 straight in along the direction of the first slots 12 to the predetermined position of the base 1. Then, push the boss 34 of the limiting member 3 into the second slot 13 and slide it straight along the second slot 13 until the limiting flange 31 abuts against the printed circuit board 2 to fix the printed circuit board 2. During the pushing process, when the limiting member 3 reaches the position of the limiting hole 11 on the base 1, the claws of the first elastic clamping portion 32 will undergo elastic deformation, rebound and engage with the limiting hole 11 to complete the vertical direction locking. At the same time, the claws of the second elastic clamping portion 33 of the limiting member 3 are clamped to the bottom surface of the base 1 to complete the horizontal direction locking.

[0037] As Figure 1 shown, after installation is completed, a stable mechanical connection is formed between the first elastic clamping portion 32 of the limiting member 3 and the limiting hole 11, and between the second elastic clamping portion 33 and the base 1. Through the synergistic action of the first elastic clamping portion 32 and the second elastic clamping portion 33, two-way locking is achieved, thereby ensuring that the limiting member 3 firmly installs and fixes the printed circuit board 2 on the base 1 and preventing the printed circuit board 2 from loosening in a vibrating environment.

[0038] When the printed circuit board 2 needs to be disassembled, as Figure 4As shown, a disassembly tool such as a screwdriver or a small sharp object can be used to insert into the disassembly channel 14 of the base 1, and push up the first elastic clamping portion 32 of the limiting member 3 from the bottom to disengage the hook of the first elastic clamping portion 32 from the locking of the limiting hole 11, so as to achieve the loosening of the first buckle 32. Then, the limiting member 3 is withdrawn from the base 1 along the second card slot 13, and then the printed circuit board 2 can be taken out.

[0039] The present utility model also provides an inverter, and the inverter adopts the printed circuit board buckle mounting structure described above, wherein the base 1 is located inside the inverter housing. The base can be installed inside the inverter in the same housing as the inverter, or through connection and fixation, etc. The specific installation form and the type of the printed circuit board are not specifically limited in the present utility model.

[0040] The above are only the preferred embodiments of the present utility model, rather than any form of limitation to the present utility model. Those skilled in the art can make various equivalent changes and improvements on the basis of the above embodiments. Any equivalent changes or modifications made within the scope of the claims shall be included within the protection scope of the present utility model.

Claims

1. A snap-in mounting structure for a printed circuit board, characterized in that, Comprising: A base (1), the base (1) is provided with a first guiding structure for mounting a printed circuit board (2) and a second guiding structure for mounting a limiting member (3); The limiting member (3) is provided with a limiting flange (31) at the end for restricting the displacement of the printed circuit board (2); a first elastic clamping portion (32) provided in the middle for cooperating with the limiting hole (11) of the base (1); a second elastic clamping portion (33) provided at the end for forming a clamping connection with the bottom of the base (1); After the printed circuit board (2) is mounted in place along the first guiding structure, the limiting member (3) is advanced along the second guiding structure to the working position, the first elastic clamping portion (32) engages with the limiting hole (11), and the second elastic clamping portion (33) clamps the bottom surface of the base (1), and two-way locking is achieved through the synergistic action of the first elastic clamping portion (32) and the second elastic clamping portion (33).

2. The snap-in mounting structure of the printed circuit board according to claim 1, wherein, The base (1) is further provided with a disassembly channel (14) behind the limiting hole (11), and the axis of this channel coincides with the movement track of the first elastic clamping portion (32).

3. The printed circuit board snap-in mounting structure according to claim 1, characterized in that, The first guiding structure is a first card slot (12) with a C-shaped cross-section, and the second guiding structure is a second card slot (13) with a C-shaped cross-section. The two card slots are arranged in parallel and the first card slot (12) is located above the second card slot (13).

4. The printed circuit board snap-in mounting structure according to claim 3, characterized in that, One side or both sides of the limiting member (3) are provided with bosses (34), and the end of the boss (34) close to the second card slot (13) has a guiding inclined surface.

5. The printed circuit board snap-in mounting structure according to claim 1, characterized in that, The first elastic clamping portion (32) is a hook-shaped cantilever buckle, and the movement track of the hook claw is perpendicular to the movement track of the printed circuit board, and its holding surface angle β = 90°.

6. The snap-in mounting structure of a printed circuit board according to claim 1, characterized in that, The second elastic clamping portion (33) is a hook-shaped straight arm buckle, and is provided with a hook claw in the same direction as the advancing direction, and its holding surface angle β is 35° ≤ β ≤ 45°.

7. The snap-in mounting structure of a printed circuit board according to claim 4, characterized in that, The thickness of the boss (34) matches the gap of the second card slot (13) to ensure that there is no vertical displacement when the second elastic clamping portion (33) moves horizontally.

8. The printed circuit board buckle mounting structure according to claim 3, characterized in that, The first card slot (12) has a guiding surface for the insertion of the printed circuit board (2).

9. A frequency converter, characterized in that, Adopt the printed circuit board clamping and mounting structure according to any one of claims 1 to 8, wherein the base (1) is located inside the frequency converter housing.

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