Circuit board screw-free fixing structure

Abstract

The utility model discloses a screw-free fixing structure for a circuit board. The screw-free fixing structure comprises a base, the at least one positioning column is arranged on the base, and at least part of the positioning column penetrates through a positioning hole formed in a circuit board; the at least one buckling piece is arranged on the base, and the buckling piece is configured to be clamped on at least one side of a circuit board; the cover plate is matched with the base to form a shell structure, the circuit board is installed in an installation cavity between the cover plate and the base, the cover plate is provided with at least one limiting rib, the limiting rib limits the back side of the buckling piece, and the front side of the buckling piece is provided with a limiting part used for limiting the circuit board. According to the embodiment, the cover plate and the base can be connected through a buckle or fixed through a screw. Compared with the prior art, the utility model has the advantages that the structure is simple, not only is the cost rise caused by screw fixation saved, but also the risk of damaging the circuit board can be reduced, meanwhile, the assembly stability is strong, and the installation is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to circuit board production and manufacturing technical field, concretely relates to a circuit board screwless fixing structure. BACKGROUND

[0002] When the existing circuit board is installed on the fixed plate, it needs to be fixed by auxiliary installation parts such as screws. In the installation process of the circuit board, it is necessary to lock the screw, and the installation time is long and complicated. At the same time, it is necessary to inlay copper nuts on the fixed plate for tightening and fixing, and the number of additional parts is large, and the production cost is high. If the force is not well controlled during the screw installation process, there is a risk of damaging the circuit board, and the screw will rust and corrode the circuit board over time, which also increases the cost of parts and labor. Therefore, it is very important to obtain a circuit board screwless fixing structure. SUMMARY

[0003] In order to solve at least one of the above technical problems, the utility model provides a circuit board screwless fixing structure, which comprises a base;

[0004] At least one positioning column is arranged on the base, and the positioning column at least partially penetrates the positioning hole arranged on the circuit board;

[0005] At least one buckle part is arranged on the base, and the buckle part is configured to be clamped on at least one side of the circuit board;

[0006] A cover plate cooperates with the base to form a shell structure, and the circuit board is installed in the installation cavity between the cover plate and the base. At least one limiting rib is arranged on the cover plate, the limiting rib limits the back side of the buckle part, and the front side of the buckle part is provided with a limiting part for limiting the circuit board.

[0007] A positioning groove is arranged on the cover plate and matched with the positioning column. A protrusion is arranged on the cover plate, the positioning groove is arranged on the protrusion, and a gap is formed between the bottom of the protrusion and the circuit board. The gap is about 0.3mm.

[0008] The positioning column comprises at least one first positioning column and at least one second positioning column, and the first positioning column is higher than the second positioning column. The positioning hole comprises at least one first positioning hole, and the shape of the first positioning hole is matched with the first positioning column to realize high-precision matching. The positioning hole comprises at least one second positioning hole, at least one of the second positioning holes is a long hole, the width of the long hole is matched with the diameter of the second positioning column, the length is longer than the diameter of the second positioning column, the second positioning column penetrates the second positioning hole to realize low-precision matching in the length direction and high-precision matching in the width direction to prevent the circuit board from rotating. At least one of the second positioning holes is matched with the second positioning column to realize low-precision matching.

[0009] A guide inclined surface is formed on the positioning column.

[0010] A supporting surface is arranged on the positioning column for supporting the circuit board, so that a space is formed between the circuit board and the bottom surface of the base.

[0011] The limiting rib is tightly attached to the outer wall of the buckle member or a space is formed between the limiting rib and the outer wall of the buckle member.

[0012] Compared with the prior art, the utility model has the advantages that the utility model has simple structure, can not only save the cost increase caused by screw fixing, but also can reduce the risk of damaging the circuit board, has stable assembling performance, and is convenient to install. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a perspective view of the base and the circuit cooperation structure of the utility model;

[0014] Figure 2 It is a bottom perspective view of the cover plate of the utility model;

[0015] Figure 3 It is a cross section schematic of the utility model Figure 1 ;

[0016] Figure 4 It is a cross section schematic of the utility model Figure 2 ;

[0017] Figure 5 It is a top view of the utility model;

[0018] Figure 6 It is a perspective view of the base of the utility model;

[0019] Reference signs:

[0020] 1 base; 2 positioning column; 201 first positioning column; 202 second positioning column; 3 buckle member; 4 cover plate; 5 limiting rib; 6 limiting part; 7 positioning hole; 701 first positioning hole; 702 second positioning hole; 8 protrusion; 9 gap; 10 guide inclined surface; 11 buckle inclined surface; 12 supporting surface; 13 circuit board; 14 positioning groove. DETAILED DESCRIPTION

[0021] In order to make the person skilled in the art better understand the utility model, so that the scope of protection of the utility model is more clearly limited, the utility model is described in detail below with regard to certain specific embodiments of the utility model. It should be noted that the following is only certain specific embodiments of the utility model concept and is only a part of the utility model, and the specific and direct description of related structures is only for the convenience of understanding the utility model, and each specific feature does not of course, directly limit the implementation scope of the utility model.

[0022] Referring to the drawings, the utility model adopts the following technical scheme, a circuit board screwless fixing structure, including base 1,

[0023] At least one positioning column 2 is arranged on the base 1, and the positioning column 2 at least partially penetrates the positioning hole 7 arranged on the circuit board 13;

[0024] At least one buckle piece 3 is arranged on the base 1, and the buckle piece 3 is configured to be clamped on at least one side of the circuit board 13;

[0025] The cover plate 4 cooperates with the base 1 to form a shell structure, the circuit board 13 is installed in the mounting cavity between the cover plate 4 and the base 1, at least one limiting rib 5 is arranged on the cover plate 4, the limiting rib 5 limits the back side of the buckle piece 3, and the front side of the buckle piece 3 is provided with a limiting portion 6 for limiting the circuit board. In the embodiment, the cover plate 4 can be buckled or screwed with the base 1.

[0026] The cover plate 4 is provided with a positioning groove 14 matched with the positioning column 2 for insertion. The cover plate 4 is provided with a protrusion 8, the positioning groove 14 is arranged on the protrusion 8, and the bottom of the protrusion 8 has a gap 9 with the circuit board 13. The gap 9 is about 0.3mm.

[0027] The positioning column 2 includes at least one first positioning column 201 and at least one second positioning column 202, and the first positioning column 201 is higher than the second positioning column 202. The positioning hole 7 includes at least one first positioning hole 701, and the shape of the first positioning hole 701 is matched with the first positioning column 201 to realize high-precision matching. The positioning hole 7 includes at least one second positioning hole 702, at least one of the second positioning holes 702 is a long hole, the width of the long hole is matched with the diameter of the second positioning column 202, the length is longer than the diameter of the second positioning column 202, and the second positioning column 202 penetrates the second positioning hole 702 to realize low-precision matching in the length direction and high-precision matching in the width direction to prevent the circuit board 13 from rotating. At least one of the second positioning holes 702 is matched with the second positioning column 202 to realize low-precision matching, for example, the second positioning hole is larger than the cross section of the second positioning column, which can facilitate the second positioning column to penetrate to realize low-precision matching.

[0028] In the embodiment, one first positioning column 201 and three second positioning columns 202 are arranged.

[0029] In the embodiment, a guide slope 10 is arranged on the first positioning column 201, and one of the high-precision second positioning columns 202 is arranged with a guide slope 10; a buckle slope 11 is arranged on the buckle member 3.

[0030] The positioning column 2 is arranged with a supporting surface 12 for supporting the circuit board 13, so that the circuit board 13 and the bottom surface of the base 1 have a spacing, facilitating heat dissipation.

[0031] The limiting rib 5 is tightly arranged on the outer wall of the buckle member 3 or has a spacing with the outer wall of the buckle member 3, for example, 0.1 mm.

[0032] Compared with the prior art, the utility model has the advantages that the utility model has simple structure, not only saves the cost rising caused by screw fixing, but also reduces the risk of damaging the circuit board 13, has stable assembling performance, and is more convenient to install.

[0033] The technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the utility model, and the technical schemes after the changes or replacements will fall within the protection scope of the utility model.

Claims

1. A screwless circuit board fixing structure, characterized in that: Including the base (1); At least one positioning post (2) is disposed on the base (1), and the positioning post (2) passes at least partially through the positioning hole (7) opened on the circuit board (13); At least one latching member (3) is disposed on the base (1), the latching member (3) being configured to snap onto at least one side of the circuit board (13); The cover plate (4) cooperates with the base (1) to form a shell structure. The circuit board (13) is installed in the mounting cavity between the cover plate (4) and the base (1). The cover plate (4) is provided with at least one limiting rib (5). The limiting rib (5) limits the back side of the buckle (3). The front side of the buckle (3) is provided with a limiting part (6) for limiting the circuit board.

2. The screwless circuit board fixing structure according to claim 1, characterized in that: The cover plate (4) is provided with a positioning groove (14) that is inserted into the positioning post (2).

3. The screwless circuit board fixing structure according to claim 2, characterized in that: The cover plate (4) has a protrusion (8), the positioning groove (14) is formed on the protrusion (8), and there is a gap (9) between the bottom of the protrusion (8) and the circuit board (13).

4. The screwless circuit board fixing structure according to claim 1, characterized in that: The positioning post (2) includes at least one first positioning post (201) and at least one second positioning post (202), wherein the first positioning post (201) is higher than the second positioning post (202).

5. The screwless circuit board fixing structure according to claim 4, characterized in that: The positioning hole (7) includes at least one first positioning hole (701), the shape of which matches the first positioning post (201) to achieve a high-precision fit.

6. The screwless circuit board fixing structure according to claim 4, characterized in that: The positioning hole (7) includes at least one second positioning hole (702), at least one second positioning hole (702) is an elongated hole, the width of the elongated hole is adapted to the diameter of the second positioning post (202), and the length is longer than the diameter of the second positioning post (202). The second positioning post (202) passes through the second positioning hole (702) to achieve a low-precision fit in the length direction and a high-precision fit in the width direction to prevent the circuit board (13) from rotating.

7. The screwless circuit board fixing structure according to claim 6, characterized in that: At least one of the second positioning holes (702) is shaped to fit the second positioning post (202) to achieve a low-precision fit.

8. The screwless circuit board fixing structure according to claim 1, characterized in that: The positioning post (2) is provided with a guide slope (10); and / or, the buckle (3) is provided with a buckle slope (11).

9. The screwless circuit board fixing structure according to claim 1, characterized in that: The positioning post (2) is provided with a support surface (12) for supporting the circuit board (13) so that there is a gap between the circuit board (13) and the bottom surface of the base (1).

10. The screwless circuit board fixing structure according to claim 1, characterized in that: The limiting rib (5) is close to the outer wall of the buckle (3) or there is a gap between the rib (5) and the outer wall of the buckle (3).

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