Vacuum test fixture

Abstract

The utility model discloses a vacuum test fixture comprising a vacuum fixture seat and a vacuum adsorption plate which are fixedly connected, and a jacking device, the vacuum adsorption plate is installed on the top surface of the vacuum fixture seat, and the jacking device comprises a placing plate and a lifting box installed on the surface of the vacuum adsorption plate. A jacking mechanism is arranged in the lifting box, the jacking mechanism comprises an adjusting screw rod, a mounting box, a connecting plate, a stabilizing block and a parallel stabilizing plate, the connecting plate and the stabilizing block are fixedly connected, the adjusting screw rod penetrates through the lifting box and the side face of the mounting box, and a lifting gear is arranged on the outer side, located in the mounting box, of the adjusting screw rod; an adjusting screw rod and a lifting gear are rotated, so that the lifting gear lifts a stabilizing block, the stabilizing block drives a connecting plate and a stabilizing plate to move upwards, an ejector pin penetrates through a through hole in a placing plate, the integrated circuit board moves upwards, a gap is formed between the integrated circuit board and the placing plate, and the integrated circuit board can be taken down easily.

Description

Technical Field

[0001] The utility model belongs to the technical field of electronic device processing fixtures, and particularly relates to a vacuum test fixture. Background Art

[0002] The material of an integrated circuit board is semiconductor. An integrated circuit is composed of a large number of semiconductor elements (such as transistors, diodes, etc.) connected together through a microcircuit, realizing an electronic device with complex functions, small volume and low power consumption. An integrated circuit board is an electronic device composed of semiconductor elements. During the manufacturing process of an integrated circuit board, fixtures are needed to process it. A vacuum test fixture is a conventional fixed test fixture. The Chinese utility model authorized patent application number CN202120747004.1 discloses a chip vacuum test fixture. The vacuum test fixture is a conventional method to firmly fix a circuit board by pumping to form a pressure difference.

[0003] Air holes are formed on the top surface of the vacuum test fixture. During the process of adsorbing an integrated circuit board for processing, the integrated circuit board is closely attached to the top surface of the vacuum test fixture. When manually removing the integrated circuit board, the integrated circuit board is likely to slide, resulting in wear. Moreover, the thickness of the integrated circuit board is small, which is not conducive to lifting it off. When the vacuum test fixture adsorbs the integrated circuit board, there is a problem that the integrated circuit board cannot be conveniently removed. For this reason, this application proposes a vacuum test fixture. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a vacuum test fixture to solve the problem that the integrated circuit board cannot be conveniently removed as mentioned in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A vacuum test fixture includes a fixedly connected vacuum fixture base and a vacuum adsorption plate, and a lifting device. The vacuum adsorption plate is installed on the top surface of the vacuum fixture base. The lifting device includes a placement plate and a lifting box installed on the surface of the vacuum adsorption plate. A lifting mechanism is arranged inside the lifting box. The lifting mechanism includes an adjusting screw, an installation box, a connecting plate and a stabilizing block fixedly connected, and parallel stabilizing plates. The adjusting screw penetrates through the side surfaces of the lifting box and the installation box. A lifting gear is arranged on the outer side of the adjusting screw inside the installation box. The two ends of the stabilizing plate are connected to the end of the connecting plate. The stabilizing block is perpendicular to the connecting plate. The surface of the stabilizing plate is provided with equally spaced ejector pins. The surface of the placement plate is provided with a first air hole, and through holes are formed on the surfaces on both sides of the placement plate.

[0006] Preferably, the adjusting screw is connected to the lifting box and the installation box through bearings. The adjusting screw penetrates through the lifting gear, and the outer surface of the lifting gear is provided with first teeth.

[0007] Preferably, the side surface of the stabilizing block is provided with second teeth, and the first teeth on the lifting gear are distributed in a staggered manner with the second teeth.

[0008] Preferably, the cross-section of the mounting box is a "U"-shaped structure, and guide posts are provided on the inner surface of the bottom end of the mounting box, and the guide posts are embedded inside the bottom surface of the stabilizing block.

[0009] Preferably, the connecting plate is an "I"-shaped structure, the stabilizing plate and the connecting plate form a "day"-shaped structure, and the corresponding ejector pins and through holes are in clearance fit.

[0010] Preferably, an installation frame is provided inside the lifting box, a dust-proof screen and a blocking plate are provided inside the installation frame, the dust-proof screen is flush with the top surface of the installation frame, and the outer surface of the installation frame fits with the inner surface of the lifting box.

[0011] Preferably, the blocking plate includes bent plates and a horizontal plate distributed in a staggered manner, and the bent plates are in a curved shape.

[0012] Preferably, second air holes are formed on the surface of the horizontal plate, and a blocking net is provided inside the horizontal plate at the second air holes.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the present utility model, by rotating and adjusting the screw rod and the lifting gear, the lifting gear lifts the stabilizing block, the stabilizing block drives the connecting plate and the stabilizing plate to move upward, the ejector pins penetrate through the through holes on the placing plate, so that the integrated circuit board moves upward, and there is a gap between the integrated circuit board and the placing plate, which is beneficial to removing the integrated circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a three-dimensional structural diagram of the lifting box of the present utility model;

[0017] Figure 3 is a sectional structural diagram of the mounting box of the present utility model;

[0018] Figure 4 is a sectional structural diagram of the installation frame of the present utility model;

[0019] Figure 5 is of the present utility model Figure 4 Schematic enlarged structure diagram of part A;

[0020] Figure 6 is a top view structural diagram of the blocking plate of the present utility model;

[0021] In the figure: 1, vacuum fixture base; 2, vacuum adsorption plate; 3, lifting box; 4, adjusting screw; 5, placing plate; 6, mounting box; 7, connecting plate; 8, stabilizing plate; 9, mounting frame; 10, stabilizing block; 41, lifting gear; 51, first air hole; 52, through hole; 61, guiding column; 81, ejector pin; 91, dust-proof gauze; 92, blocking plate; 921, bent plate; 922, horizontal plate; 923, second air hole; 924, blocking net. Detailed implementation manner

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Embodiment 1

[0024] Please refer to Figures 1 to 3 , the present invention provides a technical solution: a vacuum test fixture, including a fixedly connected vacuum fixture base 1 and a vacuum adsorption plate 2, and a lifting device. The vacuum adsorption plate 2 is installed on the top surface of the vacuum fixture base 1. The vacuum adsorption plate 2 is screwed to the vacuum fixture base 1. The vacuum fixture base 1 is connected to an external vacuum pumping device. The vacuum fixture base 1 and the vacuum adsorption plate 2 suck the space where the placing plate 5 and the lifting box 3 are closed, and adsorb the integrated circuit board placed on the placing plate 5. The lifting device includes a placing plate 5 and a lifting box 3 installed on the surface of the vacuum adsorption plate 2. The placing plate 5 and the lifting box 3 are of a split structure. The lifting box 3 is screwed to the vacuum adsorption plate 2. An elevating mechanism is provided inside the lifting box 3. The elevating mechanism includes an adjusting screw 4 and a mounting box 6, a fixedly connected connecting plate 7 and a stabilizing block 10, and parallel stabilizing plates 8. The lifting gear 41 is meshed with the stabilizing block 10. By rotating the adjusting screw 4 and the lifting gear 41, the lifting gear 41 lifts the stabilizing block 10. The stabilizing block 10 drives the connecting plate 7 and the stabilizing plate 8 to move upward. The ejector pin 81 penetrates through the through hole 52 on the placing plate 5, so that the integrated circuit board moves upward. There is a gap between the integrated circuit board and the placing plate 5, which is beneficial to removing the integrated circuit board. The adjusting screw 4 penetrates through the side surfaces of the lifting box 3 and the mounting box 6. A lifting gear 41 is provided on the outer side of the adjusting screw 4 located inside the mounting box 6. The lifting gear 41 is welded to the adjusting screw 4 by screws. The two ends of the stabilizing plate 8 are connected to the end of the connecting plate 7. The stabilizing block 10 is perpendicular to the connecting plate 7. The stabilizing block 10 is screwed to the connecting plate 7. The surface of the stabilizing plate 8 is provided with ejector pins 81 distributed at equal intervals. The ejector pins 81 are perpendicular to the stabilizing plate 8. The surface of the placing plate 5 is provided with first air holes 51, which is beneficial to forming an air pressure difference. Through holes 52 are provided on the surfaces on both sides of the placing plate 5, which is beneficial to the penetration of the ejector pins 81.

[0025] In this embodiment, the adjusting screw rod 4 is connected to the lifting box 3 and the mounting box 6 through bearings. The adjusting screw rod 4 penetrates through the lifting gear 41. The outer surface of the lifting gear 41 is provided with first teeth, and the side surface of the stabilizing block 10 is provided with second teeth. The first teeth on the lifting gear 41 and the second teeth are staggeredly distributed. The lifting gear 41 is meshed and connected with the stabilizing block 10. By rotating the adjusting screw rod 4 and the lifting gear 41, the lifting gear 41 lifts the stabilizing block 10, and the stabilizing block 10 drives the connecting plate 7 and the stabilizing plate 8 to move upward.

[0026] In this embodiment, the cross-section of the mounting box 6 is a "U"-shaped structure. The inner surface of the bottom end of the mounting box 6 is provided with guide posts 61. The guide posts 61 are embedded inside the bottom surface of the stabilizing block 10. The guide posts 61 play a role in guiding the stabilizing block 10. The cross-section of the guide posts 61 is square-shaped to prevent the stabilizing block 10 from tilting.

[0027] In this embodiment, the connecting plate 7 is of an "I"-shaped structure. The stabilizing plate 8 and the connecting plate 7 form a "day"-shaped structure. The corresponding ejector pins 81 and the through holes 52 are in clearance fit. The ejector pins 81 penetrate through the corresponding through holes 52. The ejector pins 81 lift the integrated circuit board, which is beneficial for taking it off.

[0028] In summary: Rotate the adjusting screw rod 4 and the lifting gear 41 to make the lifting gear 41 lift the stabilizing block 10. The stabilizing block 10 drives the connecting plate 7 and the stabilizing plate 8 to move upward. The ejector pins 81 penetrate through the through holes 52 on the placement plate 5 to make the integrated circuit board move upward. There is a gap between the integrated circuit board and the placement plate 5, which is beneficial for taking off the integrated circuit board.

[0029] Embodiment 2

[0030] Please refer to Figures 1 to 6 , which is the second embodiment of the present utility model. This embodiment is based on the previous embodiment. An installation frame 9 is provided inside the lifting box 3. The installation frame 9 is screwed to the lifting box 3. Inside the installation frame 9, there are a dust-proof screen 91 and a baffle plate 92. The dust-proof screen 91 and the baffle plate 92 play a role in blocking debris. The dust-proof screen 91 is flush with the top surface of the installation frame 9. The outer surface of the installation frame 9 fits with the inner surface of the lifting box 3. The baffle plate 92 includes staggeredly distributed bent plates 921 and a horizontal plate 922. The bent plates 921 are in a bent shape. There is a height difference between the bent plates 921 and the horizontal plate 922, which is beneficial for debris precipitation. The surface of the horizontal plate 922 is provided with second air holes 923, which do not affect the formation of an air pressure difference. A blocking net 924 is provided inside the horizontal plate 922 at the second air holes 923. The blocking net 924 plays a role in blocking debris. The dust-proof screen 91 and the blocking net 924 are designed as a double-layer debris blocking structure to prevent debris from blocking the adsorption holes on the surface of the vacuum adsorption plate 2.

[0031] In summary, the dust-proof screen 91 and the baffle 92 play a role in blocking debris. The dust-proof screen 91 and the blocking net 924 are designed as a double-layer debris blocker to prevent debris from clogging the adsorption holes on the surface of the vacuum adsorption plate 2.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vacuum test fixture, comprising a fixedly connected vacuum fixture seat (1) and a vacuum adsorption plate (2), and a lifting device, wherein the vacuum adsorption plate (2) is mounted on the top surface of the vacuum fixture seat (1), characterized in that: The lifting device comprises a placing plate (5) and a lifting box (3) mounted on the surface of a vacuum adsorption plate (2); a lifting mechanism is arranged inside the lifting box (3); the lifting mechanism comprises an adjusting screw (4) and an installation box (6), a fixedly connected connecting plate (7) and a stabilizing block (10), and a parallel stabilizing plate (8); the adjusting screw (4) passes through the sides of the lifting box (3) and the installation box (6); a lifting gear (41) is arranged on the outer side of the adjusting screw (4) located inside the installation box (6); both ends of the stabilizing plate (8) are connected to the ends of the connecting plate (7); the stabilizing block (10) is perpendicular to the connecting plate (7); the surface of the stabilizing plate (8) is provided with equidistantly distributed ejectors (81); a first air hole (51) is provided on the surface of the placing plate (5); and through holes (52) are provided on the surfaces of both sides of the placing plate (5).

2. A vacuum test fixture according to claim 1, characterized in that: The adjusting screw (4) is connected to the lifting box (3) and the installation box (6) via bearings. The adjusting screw (4) passes through the lifting gear (41). The outer surface of the lifting gear (41) is provided with first teeth.

3. A vacuum test fixture according to claim 2, characterized in that: A second tooth is provided on the side of the stabilizing block (10), and the first tooth and the second tooth on the lifting gear (41) are staggered.

4. A vacuum test fixture according to claim 1, characterized in that: The cross section of the installation box (6) is a "U"-shaped structure. The inner surface of the bottom end of the installation box (6) is provided with a guide column (61), and the guide column (61) is embedded in the inner surface of the bottom end of the stabilizing block (10).

5. A vacuum test fixture according to claim 1, characterized in that: The connecting plate (7) is an "I"-shaped structure, the stabilizing plate (8) and the connecting plate (7) form a "R"-shaped structure, and the ejector pins (81) and through holes (52) are in one-to-one correspondence with each other in clearance fit.

6. A vacuum test fixture according to claim 1, characterized in that: The lifting box (3) is provided with an installation frame (9) inside, and a dust-proof screen (91) and a blocking plate (92) are provided inside the installation frame (9). The dust-proof screen (91) is flush with the top surface of the installation frame (9), and the outer surface of the installation frame (9) is consistent with the inner surface of the lifting box (3).

7. A vacuum test fixture according to claim 6, characterized in that: The blocking plate (92) comprises a staggered distribution bent plate (921) and a horizontal plate (922), and the bent plate (921) is in a curved shape.

8. A vacuum test fixture according to claim 7, characterized in that: A second air hole (923) is provided on the surface of the horizontal plate (922), and a blocking net (924) is provided on the horizontal plate (922) in the second air hole (923).

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