A stripping jig

Abstract

This utility model relates to the field of circuit board processing. It discloses a peeling fixture, comprising: a substrate, positioning components, and several ejection assemblies. The through-holes of the circuit board are covered with a protective film. The circuit board is detachably connected between two positioning components. Each ejection assembly includes: a guide component, an ejection component, and an elastic component. The guide component is located on the bottom surface of the substrate. The ejection component includes a bottom end and an ejection portion, which penetrates the guide component and extends into the through-hole. The ejection portion is slidably connected to the guide component in a vertical direction. The centerline of the elastic component is coaxial with the centerline of the ejection portion, and the elastic component is sandwiched between the guide component and the bottom end. When the substrate and circuit board are pressed downwards, the ejection portion rises relative to the circuit board, lifting the protective film covering the through-hole, thus initially separating the protective film from the circuit board. When the fixture substrate and elastic component are reset, the ejection portion retracts into the through-hole, facilitating the complete removal of the protective film by on-site personnel.

Description

Technical Field

[0001] This utility model relates to the field of circuit board processing, and in particular to a stripping fixture. Background Technology

[0002] SMT (Surface Mount Technology) is an important assembly method in modern electronics manufacturing. SMT directly mounts components onto pads on the PCB surface, greatly improving component density and production efficiency.

[0003] In surface mount technology (SMT) processes, circuit boards often have various vias (such as conductive vias). To prevent these vias from being immersed in solder paste or other materials during SMT processing, a protective film made of plastic is used to cover them, preventing them from being exposed. After SMT processing, the protective film covering the vias needs to be peeled off. However, due to the small diameter of the vias, the protective film area is small, and it adheres tightly to the copper surface of the circuit board, making it difficult to peel off. Utility Model Content

[0004] The purpose of this invention is to provide a peeling fixture to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a stripping fixture, comprising: a substrate for supporting a circuit board, two positioning components facing each other, and several ejection components, wherein the circuit board is configured with several through holes, and each through hole is covered with a protective film. The two positioning components are distributed along the diagonal of the substrate on the upper surface of the substrate, and the circuit board is detachably connected between the two positioning components; The ejector assembly array is distributed on the substrate, and each ejector assembly includes: A guide component is provided, wherein the bottom surface of the substrate is provided with a positioning groove, and the guide component is connected to the inside of the positioning groove; An ejector component, comprising a bottom end and an ejector portion extending vertically upward from the bottom end, the bottom end being located below a guide component, the ejector portion penetrating the guide component and extending into a through hole, and the ejector portion being slidably connected to the guide component in a vertical direction; An elastic component, the centerline of which is coaxial with the centerline of the ejector portion, is sandwiched between the guide component and the bottom end.

[0006] Preferably, the cross-section of the positioning groove gradually decreases from bottom to top, the guide component is a sleeve, the sleeve is frustum-shaped, and a central hole is formed in the middle of the sleeve for the ejector portion to pass through.

[0007] Preferably, the bottom end is a circular plate, and the top part is a cylindrical structure with a circular cross-section. The bottom end and the top part are integrally formed or threadedly connected.

[0008] Preferably, the elastic component is a compression spring, the outer diameter of the elastic component is smaller than the diameter of the bottom end, and the inner diameter of the elastic component is larger than the diameter of the top end.

[0009] Preferably, the upper end face of the protruding part is spherical.

[0010] Preferably, the fixture further includes a limiting component, which is slidably connected to the positioning component in the horizontal direction, and the edge of the circuit board is sandwiched between the substrate and the limiting component.

[0011] Preferably, the limiting component includes a pressure plate extending in the horizontal direction, the positioning component is an L-shaped block, the upper surface of the positioning component is provided with a sliding groove, and the pressure plate is slidably connected to the sliding groove in the horizontal direction.

[0012] Preferably, the limiting component further includes a pressure block, one end of the bottom surface of the pressure block is provided with a groove, the other end of the bottom surface of the pressure block is provided with an upwardly inclined surface, the pressure plate is detachably connected to the inside of the groove, and the edge of the circuit board is sandwiched between the substrate and the inclined surface.

[0013] Preferably, one end of the pressure plate is bent upwards and has a folding plate, which is detachably connected to the side of the pressure block.

[0014] Preferably, a graphite sleeve is fitted inside the central hole, and the graphite sleeve slidably abuts against the circumferential surface of the ejector portion.

[0015] The beneficial effects of this invention are as follows: The circuit board is clamped and fixed to the substrate by two positioning components, and the ejector portion penetrates the through-hole. When a vertically downward force is applied to the upper surface of the substrate, the substrate moves downward, and the guide component follows the substrate downward, causing the distance between the guide component and the bottom end to decrease. The elastic component is then compressed by the bottom end and the guide component. At this time, the ejector portion and the circuit board move relative to each other, and the ejector portion rises relative to the circuit board, lifting the protective film covering the through-hole, thus initially separating the protective film from the circuit board. When the fixture substrate and the elastic component are reset, the ejector portion retracts into the through-hole, facilitating the complete removal of the protective film by on-site personnel. Attached Figure Description

[0016] The accompanying drawings further illustrate the present invention, but the embodiments in the drawings do not constitute any limitation on the present invention.

[0017] Figure 1 This is a schematic diagram of the structure of a peeling fixture provided in an embodiment of the present invention; Figure 2 A cross-sectional view provided for an embodiment of this utility model; Figure 3 for Figure 2 A magnified view of a portion of region A in the middle; Figure 4 This is a schematic diagram of the structure of a pressure block provided in an embodiment of the present invention; The markings in the diagram are: 1. Base plate; 2. Positioning component; 3. Guiding component; 4. Ejection component; 5. Bottom end; 6. Ejection part; 7. Pressure plate; 8. Pressure block; 9. Fixing plate. Detailed Implementation

[0018] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0019] It should be noted that, in this utility model, unless otherwise stated, when an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or an intervening element may be present simultaneously. When an element is referred to as "connected to" another element, it can be directly connected to the other element or an intervening element may be present simultaneously. The directional terms used, such as "up," "down," "left," and "right," generally refer to... Figure 1 The directions shown are up, down, left, and right. "Inner" and "outer" refer to the inner and outer parts of a specific outline. "Far" and "near" refer to the distance or proximity relative to a particular component.

[0020] like Figures 1-4 As shown in the figure, an embodiment of the present invention provides a stripping fixture, including: a substrate 1 for supporting a circuit board, two positioning components 2 facing each other, and a plurality of ejection components, wherein the circuit board is configured with a plurality of through holes, and each of the through holes is covered with a protective film. The two positioning components 2 are distributed along the diagonal of the substrate 1 on the upper surface of the substrate 1, and the circuit board is detachably clamped between the two positioning components 2; The ejector assembly array is distributed on the substrate 1, and each ejector assembly includes: Guide component 3, the bottom surface of the base plate 1 is provided with a positioning groove, and the guide component 3 is connected to the inside of the positioning groove; The ejector part 6 component 4 includes a bottom end 5 and an ejector part 6 extending vertically upward from the bottom end 5. The bottom end 5 is located below the guide component 3. The ejector part 6 penetrates the guide component 3 and extends into the through hole. The ejector part 6 can be slidably connected to the guide component 3 in the vertical direction. An elastic component, the center line of which is coaxial with the center line of the ejector portion 6, is sandwiched between the guide component 3 and the bottom end 5.

[0021] The cross-section of the positioning groove gradually narrows from bottom to top. The guide component 3 is a sleeve, which is frustum-shaped, with a central hole in the middle for the ejector part 6 to pass through. The guide component 3 is clearance-fitted with the positioning groove. The weight of the substrate 1 compresses the elastic component, which applies elastic force to the guide component 3, causing the guide component 3 to move upward relative to the substrate 1 to the upper end of the positioning groove. This allows the guide component 3 to fit tightly against the inner wall of the positioning groove, thereby achieving the positioning of the ejector part 6.

[0022] The bottom end 5 is a circular plate, and the ejector part 6 is a cylindrical structure with a circular cross-section. The bottom end 5 and the ejector part 6 are integrally formed or threadedly connected. The upper end surface of the ejector part 6 is spherical. The upper end surface of the ejector part 6 has a raised structure to facilitate the lifting of the protective film. The detachable connection between the bottom end 5 and the ejector part 6 facilitates the installation of the graphite sleeve. The integral forming of the bottom end 5 and the ejector part 6 reduces the number of parts and facilitates processing.

[0023] Preferably, the elastic component is a compression spring, the outer diameter of the elastic component is smaller than the diameter of the bottom end 5, and the inner diameter of the elastic component is larger than the diameter of the top part 6.

[0024] The fixture also includes a limiting component, which is slidably connected to the positioning component 2 in a horizontal direction. The edge of the circuit board is sandwiched between the substrate 1 and the limiting component. The circuit board and the substrate 1 are detachably connected via the limiting component.

[0025] The limiting component includes a pressure plate 7 extending horizontally. The positioning component 2 is an L-shaped block with a groove on its upper surface. The pressure plate 7 is slidably connected to the groove in the horizontal direction. A fixing plate 9 is provided on the upper surface of the positioning component 2. The edge of the pressure plate 7 is sandwiched between one end of the fixing plate 9 and the bottom of the groove. The circuit board is fixed by clamping it with the base plate 1 through the pressure plate 7. Pressing the base plate 1 will cause the circuit board to move downwards and approach the bottom end 5.

[0026] The limiting component also includes a pressure block 8, which has a groove at one end of its bottom surface and an upwardly inclined surface at the other end. A pressure plate 7 is detachably connected to the groove, and the edge of the circuit board is sandwiched between the substrate 1 and the inclined surface. The inclination of the inclined surface is 5° to 15°. The inclined surface fixes the edge of the circuit board to the substrate 1, and can accommodate circuit boards of various thicknesses.

[0027] One end of the pressure plate 7 is bent upwards and has a folded plate, which is detachably connected to the side of the pressure block 8 by countersunk screws. The detachable connection between the folded plate and the side of the pressure block 8 fixes the pressure plate 7 and avoids creating holes in the pressure plate 7.

[0028] A graphite sleeve is fitted inside the central hole, and the graphite sleeve slidably abuts against the circumferential surface of the ejector portion 6. The graphite sleeve reduces the friction between the central hole and the ejector portion 6, thereby reducing the resistance when pressing down the substrate 1 and achieving the purpose of saving effort.

[0029] The technical features of the embodiments described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these should all be considered to be within the scope of this specification.

Claims

1. A peeling fixture, characterized in that: include: A substrate for supporting a circuit board, two opposing positioning components, and several ejection assemblies, wherein the circuit board is detachably connected between the two positioning components, and the circuit board is configured with several through holes, each of which is covered with a protective film. The two positioning components are distributed along the diagonal of the substrate on the upper surface of the substrate; The ejector assembly array is distributed on the substrate, and each ejector assembly includes: A guide component is provided, wherein the bottom surface of the substrate is provided with a positioning groove, and the guide component is connected to the inside of the positioning groove; An ejector component, comprising a bottom end and an ejector portion extending vertically upward from the bottom end, the bottom end being located below a guide component, the ejector portion penetrating the guide component and extending into a through hole, and the ejector portion being slidably connected to the guide component in a vertical direction; An elastic component, the centerline of which is coaxial with the centerline of the ejector portion, is sandwiched between the guide component and the bottom end.

2. The peeling fixture according to claim 1, characterized in that: The cross-section of the positioning groove gradually decreases from bottom to top. The guide component is a sleeve, which is truncated cylindrical in shape. A central hole is constructed in the middle of the sleeve for the ejector to pass through.

3. The peeling fixture according to claim 2, characterized in that: The bottom end is a circular plate, and the top part is a cylindrical structure with a circular cross-section. The bottom end and the top part are integrally formed or threadedly connected.

4. The peeling fixture according to claim 1, characterized in that: The elastic component is a compression spring, the outer diameter of the elastic component is smaller than the diameter of the bottom end, and the inner diameter of the elastic component is larger than the diameter of the top end.

5. The peeling fixture according to claim 3, characterized in that: The upper surface of the protruding part is spherical.

6. The peeling fixture according to claim 1, characterized in that: The stripping fixture also includes a limiting component, which is slidably connected to the positioning component in the horizontal direction, and the edge of the circuit board is sandwiched between the substrate and the limiting component.

7. The peeling fixture according to claim 6, characterized in that: The limiting component includes a pressure plate extending in the horizontal direction, the positioning component is an L-shaped block, the upper surface of the positioning component is provided with a sliding groove, and the pressure plate is slidably connected to the sliding groove in the horizontal direction.

8. The peeling fixture according to claim 7, characterized in that: The limiting component also includes a pressure block, one end of the bottom surface of the pressure block has a groove, the other end of the bottom surface of the pressure block has an upwardly inclined slope, the pressure plate is detachably connected to the inside of the groove, and the edge of the circuit board is sandwiched between the substrate and the inclined slope.

9. The peeling fixture according to claim 8, characterized in that: One end of the pressure plate is bent upwards and has a folded plate, which is detachably connected to the side of the pressure block.

10. The peeling fixture according to claim 3, characterized in that: A graphite sleeve is fitted inside the central hole, and the graphite sleeve is slidably abutting against the circumferential surface of the ejector portion.

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