Combined jig capable of preventing stripping plate from being warped

Abstract

The utility model relates to a combined jig for preventing a stripper plate from warping, which comprises a carrier plate and an ejector pin bottom plate arranged on the lower surface of the carrier plate, the carrier plate comprises a circuit board positioning area and a side wall area positioned outside the circuit board positioning area, a circuit board is embedded in the circuit board positioning area, and the ejector pin bottom plate is arranged below the carrier plate. A plurality of avoiding holes are distributed in the circuit board positioning area in an array mode, the ejector pin bottom plate comprises a plate body and a plurality of ejector pins, and the ejector pins correspond to the avoiding holes in a one-to-one mode and can eject the circuit board to the height higher than the side wall area. According to the utility model, the ejector pin can be in contact with a certain position on the lower surface of the circuit board after penetrating through the receding hole, so that the circuit board can be wholly jacked up and can be better clamped and taken away from two sides after being separated from a side wall area, and the problem of board warping caused by single-side stripping is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to printed circuit board manufacturing technical field, especially relate to a kind of combined fixture for avoiding material-removing plate warping. BACKGROUND

[0002] Circuit board, also known as circuit board or PCB (Printed Circuit Board), is a flat plate used to connect and support electronic components in electronic devices. It is usually made of insulating material, covered with conductive paths that are used to transmit electrical signals. Circuit boards are widely used in various electronic products, such as mobile phones, computers, automotive electronics, and industrial control equipment.

[0003] Some circuit board products need to use fixtures for positioning during welding. The fixtures have a recess structure matching the edge of the circuit board as a positioning area. However, when the circuit board is manually separated from the fixture, the gap between the sidewall of the fixture and the edge of the circuit board is too narrow, causing difficulty in material removal. If the circuit board is pried from one side, it may cause warping problems, which cannot meet the precision requirements of customers.

[0004] Therefore, a new fixture is needed to solve the above problems. SUMMARY

[0005] The main purpose of the utility model is to provide a combined fixture that avoids material-removing plate warping. When the circuit board is removed from the carrier plate, the ejector pin is used to lift the circuit board from the circuit board positioning area, thereby eliminating the warping problem of one-sided pickup of the circuit board.

[0006] The utility model realizes the above-mentioned purpose through the following technical scheme: a combined fixture that avoids material-removing plate warping, including a carrier plate and an ejector pin base plate located below the carrier plate. The carrier plate includes a circuit board positioning area and a side wall area located outside the circuit board positioning area. The circuit board is embedded in the circuit board positioning area. A plurality of avoidance holes are arrayed in the circuit board positioning area. The ejector pin base plate includes a plate body and a plurality of ejector pins. The ejector pins correspond one-to-one with the avoidance holes and can eject the circuit board to a height higher than the side wall area.

[0007] Specifically, four corner blocks are provided at the four corners of the plate body, and the carrier plate is located within the range surrounded by the four corner blocks.

[0008] Further, the side wall area is provided with a plurality of carrier plate positioning holes, and the plate body is provided with a carrier plate positioning column corresponding one-to-one with the carrier plate positioning holes.

[0009] Further, the carrier plate positioning column has four, and the four carrier plate positioning columns are arranged as four corners of a quadrilateral, and the quadrilateral is a non-parallelogram.

[0010] Specifically, opposite sides of the bottom plate are provided with two pickup notches, innermost sides of the pickup notches are located in a lower projection range of the carrier plate.

[0011] Specifically, the circuit board positioning area is provided with a plurality of circuit board positioning columns.

[0012] The beneficial effects of the technical scheme of the utility model are:

[0013] The utility model discloses after the thimble passes through the position-avoiding hole, and the circuit board lower surface can be contacted, so that the circuit board can be lifted, and after the circuit board is separated from the side wall area, the circuit board can be better clamped and taken from both sides, which avoids the circuit board warping caused by unilateral material removal. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the top view of the combination fixture (the thick line is the outline of the carrier plate, and the thin line is the outline of the thimble bottom plate);

[0015] Figure 2 It is the top view of the carrier plate;

[0016] Figure 3 It is the top view of the thimble bottom plate;

[0017] Figure 4 It is the partial sectional view of the combination fixture and the circuit board when the material is removed.

[0018] The numbers in the drawing represent:

[0019] 1-combination fixture, 11-carrier plate, 111-circuit board positioning area, 1111-position-avoiding hole, 1112-circuit board positioning column, 112-side wall area, 1121-carrier plate positioning hole, 12-thimble bottom plate, 121-plate body, 1211-pickup notch, 122-thimble, 123-angle block, 124-circuit board positioning column;

[0020] 2-circuit board. DETAILED DESCRIPTION

[0021] The utility model will be further explained in detail in combination with specific embodiments.

[0022] Embodiment:

[0023] For example, Figures 1 to 4As shown, the utility model discloses a kind of combined jigs 1 for avoiding material-removing plate warping, including carrier plate 11 and the ejector pin bottom plate 12 of being located below carrier plate 11, carrier plate 11 includes circuit board positioning area 111 and the side wall area 112 located outside circuit board positioning area 111, circuit board positioning area 111 is embedded circuit board 2, circuit board positioning area 111 is arrayed distribution with several avoiding holes 1111, ejector pin bottom plate 12 includes plate body 121 and several ejector pins 122, ejector pin 122 and avoiding hole 1111 one-to-one correspondence and can eject circuit board 2 to the height higher than side wall area 112.

[0024] When welding, ejector pin bottom plate 12 is not used, and circuit board 2 will be embedded in the circuit board positioning area 111 of carrier plate 11, and circuit board 2 will cover each avoiding hole 1111. When the material of circuit board 2 is removed, the ejector pin bottom plate 12 is close to the carrier plate 11 from below and then relies on the ejector pin 122 to pass through the avoiding hole 1111. The avoiding hole 1111 here is mainly to avoid the position of the ejector pin 122, but also to avoid some uneven places on the lower surface of the circuit board 2. Therefore, some avoiding holes 1111 will match the outer diameter of the ejector pin 122, and the range of some avoiding holes 1111 will be greater than the cross section of the ejector pin 122. The length and diameter of the ejector pin 122 can be inconsistent. When the ejector pin 122 passes through the avoiding hole 1111, it can contact a position on the lower surface of the circuit board 2. Therefore, the circuit board 2 can be completely lifted, and after being separated from the side wall area 112, it can be better clamped and taken away from both sides, which avoids the problem of plate warping caused by unilateral material removal.

[0025] As shown in Figure 1 and Figure 3 , the four corners of the plate body 121 are provided with four corner blocks 123, and the carrier plate 11 is located within the range surrounded by the four corner blocks 123.

[0026] Because the ejector pin 122 needs to be accurately inserted into the avoiding hole 1111 when the material is removed, the corner block 123 needs to be used as a reference for the edge of the carrier plate 11 for preliminary positioning. This can also prevent the ejector pin 122 from being bent and deformed.

[0027] As shown in Figure 2 and Figure 3 , the side wall area 112 is provided with a plurality of carrier plate positioning holes 1121, and the plate body 121 is provided with a carrier plate positioning column 124 corresponding to the carrier plate positioning hole 1121. The carrier plate positioning column 124 has four, and the four carrier plate positioning columns 124 are arranged as four corners of a quadrilateral, and the quadrilateral is a non-parallel quadrilateral.

[0028] The carrier plate positioning hole 1121 and the carrier plate positioning column 124 can precisely position the carrier plate 11 and the ejector pin bottom plate 12, and can better help the ejector pin 122 to align with the smaller caliber avoiding hole 1111. The four carrier plate positioning columns 124 are arranged as a non-parallel quadrilateral, which can prevent the carrier plate 11 from being placed in reverse.

[0029] As shown in Figure 1 and Figure 3 opposite sides of the bottom plate 121 are provided with two pickup notches 1211, the innermost side of the pickup notches 1211 is located within the lower projection range of the carrier plate 11.

[0030] The pickup notches 1211 provide a position for the fingers to put on the side of the carrier plate 11, so that the carrier plate 11 can be lifted from both sides, and the carrier plate 11 is separated from the pin bottom plate 12.

[0031] As shown in Figure 2 a plurality of circuit board positioning columns 1112 are arranged on the circuit board positioning area 111.

[0032] The circuit board 2 is provided with positioning holes, and the circuit board positioning columns 1112 can use the positioning holes to finely position the circuit board 2, thereby meeting the need for operation accuracy.

[0033] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, a number of modifications and improvements can be made, which are all within the scope of protection of the present application.

Claims

1. A combined jig for avoiding warpage of a material removal plate, characterized by: The device comprises a carrier plate and a ejector plate below the carrier plate, the carrier plate comprises a circuit board positioning area and a side wall area outside the circuit board positioning area, a circuit board is embedded in the circuit board positioning area, a plurality of avoiding holes are arranged in the circuit board positioning area, the ejector plate comprises a plate body and a plurality of ejector pins, the ejector pins correspond to the avoiding holes one by one and can eject the circuit board to a height higher than the side wall area.

2. The combination jig of claim 1, wherein: Four corner blocks are arranged at four corners of the plate body, and the carrier plate is located in a range surrounded by the four corner blocks.

3. The combination fixture of claim 2, wherein: The side wall area is provided with a plurality of carrier plate positioning holes, and the plate body is provided with carrier plate positioning columns corresponding to the carrier plate positioning holes.

4. The combination fixture of claim 3, wherein: The carrier plate positioning columns are four, and the four carrier plate positioning columns are arranged as four corners of a quadrilateral, and the quadrilateral is not a parallelogram.

5. The combination fixture of claim 1, wherein: Opposite sides of the bottom plate are provided with two pickup notches, and innermost sides of the pickup notches are located in a projection range of the carrier plate.

6. The combination fixture of claim 1, wherein: The circuit board positioning area is provided with a plurality of circuit board positioning columns.

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