Clamp for mounting plastic shell on PCB (Printed Circuit Board)

Abstract

The utility model discloses a PCB (printed circuit board) rubber shell mounting fixture, which comprises a top die and a first guide post mounted on the lower surface of the top die, the outer ring of the first guide post is sleeved with a spring, a first pressing plate and a second pressing plate from top to bottom, the bottom of the first guide post is connected with a bolt and a gasket, and the gasket limits the second pressing plate to be separated from the lower end of the first guide post. The spring is in a compressed state and applies downward elastic force to the first pressing plate and the second pressing plate; the lower surface of the second pressing plate is fixedly connected with a pressing head, and the first pressing plate and the second pressing plate are connected with spring columns in an inserted mode through inserting holes. The lower end of the spring column is provided with a flexible contact, and the circumference of the spring column is provided with a limiting ring with the diameter larger than that of the jack. The side, making contact with the rubber shell, of the pressing head is provided with an inclined face, and the pressing head is in a big-end-up shape within the length range where the inclined face is located.

Description

Technical Field

[0001] The utility model belongs to the technical field of installation moulds, and in particular relates to a PCB board plastic shell mounting clamp. Background Art

[0002] After the electronic components on the surface are attached, the PCB board 11 needs to be installed in the plastic shell 12 for sealing. One side of the PCB board 11 can be easily placed in the plastic shell 12, while the other side needs to overcome the undercut 122 and be placed at the bottom of the plastic shell 12. The undercut 122 is used to press the PCB board 11 to prevent the PCB board 11 from falling off. The existing assembly method is manual assembly.

[0003] The problems of manual assembly are: 1. low efficiency; 2. no guarantee of assembly quality; 3. easy to damage electronic components on the surface of PCB. Summary of the invention

[0004] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a PCB board plastic shell fixture.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0006] A PCB board plastic shell fixture, comprising a top mold and a first guide column installed on the lower surface of the top mold, the outer ring of the first guide column is sleeved with a spring, a first pressure plate, and a second pressure plate from top to bottom, the bottom of the first guide column is connected with a bolt and a gasket, the gasket limits the second pressure plate from being separated from the lower end of the first guide column, and the spring is in a compressed state and applies a downward elastic force to the first pressure plate and the second pressure plate;

[0007] The lower surface of the second pressing plate is fixedly connected to the pressing head, and the first pressing plate and the second pressing plate are plugged into the spring column through the plug hole;

[0008] A flexible contact is provided at the lower end of the spring column, and a limiting ring with a diameter larger than the insertion hole is provided on the circumference of the spring column;

[0009] A slope is arranged on one side of the pressure head in contact with the plastic shell, and the pressure head is in a shape of being larger at the top and smaller at the bottom within the length range of the slope.

[0010] It is further defined that it also includes a positioning mold for positioning and carrying the plastic shell, and the positioning mold is provided with a positioning hole for accommodating the bottom support feet of the plastic shell. With such a structural design, the positioning mold is used to carry the plastic shell and serves as a working table for pressing the PCB board into the interior of the plastic shell. The support feet of the plastic shell are inserted into the positioning holes, so that the placement position of the plastic shell can be positioned.

[0011] It is further defined that the lower surface of the top mold is connected to the second guide column, and the positioning mold is provided with a guide hole at the position corresponding to the projection of the second guide column. With such a structural design, the guide hole regulates the freedom of the second guide column, so that the second guide column can move in the vertical direction, thereby regulating the movement of the top mold and other components installed on the top mold. Preferably, a bushing can be provided inside the guide hole to guide the second guide column, thereby improving the guiding accuracy and avoiding the situation where the entire positioning mold needs to be replaced after the guide hole is worn.

[0012] It is further defined that the lower surface of the top mold is connected to a limiting column, and the limiting column limits the maximum downward position of the top mold by interfering with the positioning mold. With such a structural design, the upper surface of the positioning mold interferes with the lower end of the limiting column, thereby limiting the limiting column from continuing to descend.

[0013] It is further defined that the upper surface of the top mold is connected to a mold handle for coupling power. With such a structural design, the mold handle is used to connect to a power source that drives the top mold to move up and down.

[0014] The beneficial effects of the utility model include: the spring can gradually increase the downward pressure by compression, the pressing process is relatively gentle, and the damage rate of the product is greatly reduced. In addition, the pressure head can assist in expanding the internal space of the plastic shell, reduce the difficulty of pressing down the PCB board, improve the efficiency and consistency of product assembly, and effectively avoid damage to electronic components due to incorrect operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0016] Figure 1 This is a schematic diagram of the structure of a PCB board installed in a plastic shell according to an embodiment of the utility model;

[0017] Figure 2 This is a structural schematic diagram of a plastic shell in an embodiment of a PCB board plastic shell fixture of the utility model;

[0018] Figure 3 This is a front view of an embodiment of a PCB board plastic shell fixture of the utility model;

[0019] Figure 4 This is a left view of an embodiment of a PCB board plastic shell fixture of the utility model;

[0020] Figure 5 This is an isometric view of an embodiment of a PCB board plastic shell fixture of the utility model after removing the top mold and the mold handle;

[0021] Figure 6 This is a structural schematic diagram of a positioning mold in an embodiment of a PCB board plastic shell fixture of the utility model;

[0022] Figure 7 This is a structural schematic diagram of a spring column in an embodiment of a PCB board mounting plastic shell fixture of the utility model;

[0023] Figure 8 This is a structural schematic diagram of a pressure head in an embodiment of a PCB board plastic shell fixture of the utility model;

[0024] The main component symbols are described as follows:

[0025] 2. Positioning mold; 21. Guide hole; 22. Positioning hole;

[0026] 31. Second guide column; 32. Limit column;

[0027] 4. Top mold;

[0028] 5. Die handle;

[0029] 61. first guide column; 62. bolt; 63. gasket;

[0030] 71. first pressing plate; 72. second pressing plate;

[0031] 8. Spring;

[0032] 9. Spring column; 91. Flexible contact; 92. Limiting ring;

[0033] 10. Indenter; 101. Incline;

[0034] 11. PCB board;

[0035] 12. Plastic shell; 121. Support legs. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0037] like Figure 1-8 As shown, a PCB board plastic shell fixture of the utility model comprises a top mold 4 and a first guide column 61 installed on the lower surface of the top mold 4, the outer ring of the first guide column 61 is sleeved with a spring 8, a first pressing plate 71, and a second pressing plate 72 from top to bottom, the bottom of the first guide column 61 is connected with a bolt 62 and a gasket 63, the gasket 63 limits the second pressing plate 72 from being separated from the lower end of the first guide column 61, and the spring 8 is in a compressed state and applies a downward elastic force to the first pressing plate 71 and the second pressing plate 72;

[0038] The lower surface of the second pressing plate 72 is fixedly connected to the pressing head 10, and the first pressing plate 71 and the second pressing plate 72 are plugged into the spring column 9 through the plug hole;

[0039] A flexible contact 91 is provided at the lower end of the spring column 9, and a limiting ring 92 having a diameter larger than that of the insertion hole is provided on the circumference of the spring column 9;

[0040] A slope 101 is provided on the side of the pressing head 10 that contacts the plastic shell 12 . The pressing head 10 has a shape that is larger at the top and smaller at the bottom within the length range of the slope 101 .

[0041] In this embodiment:

[0042] Under the action of external force, the top mold 4 drives the pressure head 10 and the spring column 9 to move downward. When the flexible contact 91 at the lower end of the spring column 9 contacts the edge of the plastic shell 12, the spring column 9 is subjected to a reaction force, and the reaction force is applied to the second pressure plate 72 through the limit ring 92. The second pressure plate 72 pushes the first pressure plate 71 to move upward, thereby squeezing the spring 8. After being compressed, the spring 8 exerts a greater elastic force. Since the longitudinal space is reduced after the spring 8 is compressed, the top mold 4 can continue to move downward. The spring column 9 presses the plastic shell 12 under a greater elastic force. The spring column 9 should be on the side where the PCB board 11 has been placed in place.

[0043] The pressing head 10 presses the side of the plastic shell 12 outwards while following the top mold 4 to descend. The pressing head 10 has an inclined surface 101, which is larger at the top and smaller at the bottom, and can gradually press the side of the plastic shell 12 outwards, thereby expanding the internal space of the plastic shell 12, making it easier for the PCB board 11 to pass over the undercut 122 and be placed in place. The lower end of the pressing head 10 directly contacts the PCB board 11, exerting a downward force on the PCB board 11, so that the PCB board 11 enters the bottom of the plastic shell 12;

[0044] Since the spring 8 is provided, the downward pressure can be gradually increased by compression, and the pressing process is relatively gentle, which greatly reduces the damage rate of the product. In addition, the pressing head 10 can assist in expanding the internal space of the plastic shell 12, reduce the difficulty of pressing the PCB board 11, improve the efficiency and consistency of product assembly, and effectively avoid damage to electronic components due to incorrect operation.

[0045] Preferably, it also includes a positioning mold 2 for positioning and carrying the plastic shell 12. The positioning mold 2 is provided with a positioning hole 22 for accommodating the bottom support leg 121 of the plastic shell 12. With such a structural design, the positioning mold 2 is used to carry the plastic shell 12 and serves as a work surface for pressing the PCB board 11 into the plastic shell 12. The support leg 121 of the plastic shell 12 is inserted into the positioning hole 22, so that the plastic shell 12 can be positioned. In fact, other structural shapes for positioning and carrying the plastic shell 12 can also be considered according to specific circumstances.

[0046] Preferably, the lower surface of the top mold 4 is connected to the second guide column 31, and the positioning mold 2 is provided with a guide hole 21 at the position corresponding to the projection of the second guide column 31. With such a structural design, the guide hole 21 regulates the freedom of the second guide column 31, so that the second guide column 31 moves in the vertical direction, thereby regulating the movement of the top mold 4 and other components installed on the top mold 4. More preferably, a bushing can be provided inside the guide hole 21 to guide the second guide column 31, thereby improving the guiding accuracy and avoiding the situation where the positioning mold 2 needs to be replaced after the guide hole 21 is worn. In fact, other guiding structures can also be considered according to specific circumstances.

[0047] Preferably, the lower surface of the top mold 4 is connected to the limiting column 32, and the limiting column 32 limits the maximum downward position of the top mold 4 by contacting with the positioning mold 2. With this structural design, the upper surface of the positioning mold 2 contacts the lower end of the limiting column 32, thereby limiting the limiting column 32 from continuing to move downward. In fact, other limiting structures can also be considered according to specific circumstances.

[0048] Preferably, the upper surface of the top mold 4 is connected to a mold handle 5 for coupling power. With this structural design, the mold handle 5 is used to connect to a power source that drives the top mold 4 to move up and down. In fact, other power access structures can also be considered according to specific circumstances.

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A PCB board plastic shell fixture, characterized by: It comprises a top mold (4) and a first guide column (61) mounted on the lower surface of the top mold (4), the outer ring of the first guide column (61) being sleeved with a spring (8), a first pressure plate (71), and a second pressure plate (72) from top to bottom, the bottom of the first guide column (61) being connected with a bolt (62) and a gasket (63), the gasket (63) limiting the second pressure plate (72) from being separated from the lower end of the first guide column (61), the spring (8) being in a compressed state and exerting a downward elastic force on the first pressure plate (71) and the second pressure plate (72); The lower surface of the second pressing plate (72) is fixedly connected to the pressing head (10), and the first pressing plate (71) and the second pressing plate (72) are plugged into the spring column (9) via the plug hole; A flexible contact (91) is provided at the lower end of the spring column (9), and a limiting ring (92) having a diameter greater than that of the insertion hole is provided on the circumference of the spring column (9); A slope (101) is provided on the side of the pressing head (10) that contacts the plastic shell (12), and the pressing head (10) has a shape that is larger at the top and smaller at the bottom within the length range where the slope (101) is located.

2. A PCB board mounting plastic housing fixture according to claim 1, characterized in that: It also comprises a positioning mold (2) for positioning and supporting the plastic shell (12), wherein the positioning mold (2) is provided with a positioning hole (22) for accommodating a bottom support foot (121) of the plastic shell (12).

3. A PCB board mounting plastic housing fixture according to claim 2, characterized in that: The lower surface of the top mold (4) is connected to the second guide column (31), and the positioning mold (2) is provided with a guide hole (21) at a position corresponding to the projection of the second guide column (31).

4. The PCB board mounting plastic housing fixture according to claim 2, characterized in that: The lower surface of the top mold (4) is connected to a limiting column (32), and the limiting column (32) limits the maximum downward position of the top mold (4) by interfering with the positioning mold (2).

5. The PCB board mounting plastic housing fixture according to claim 1, characterized in that: The upper surface of the top mold (4) is connected to a mold handle (5) for coupling power.

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