A thin sheet clamp

Abstract

This utility model relates to the field of substrate manufacturing technology, specifically to a sheet clamping fixture. It includes: a main frame with a rectangular hollow area; a fixed clamping assembly fixedly connected to two adjacent sides of the hollow area; and a movable clamping assembly slidably connected to the other two sides of the hollow area, forming an adjustable clamping area with the fixed clamping assembly. In this application, the four sides of the sheet can be clamped by the fixed clamping assembly and the movable clamping assembly respectively, preventing unevenness of the sheet after clamping and ensuring that the sheet remains straight when straightened. The movable clamping assembly slidably connected to the other two sides of the hollow area, forming an adjustable clamping area with the fixed clamping assembly, enables the clamping of sheets of different sizes.

Description

Technical Field

[0001] This utility model relates to the field of substrate manufacturing technology, specifically to a thin sheet clamp. Background Technology

[0002] In today's era of rapid development in electronic information technology, all kinds of electronic devices rely on PCB circuit boards. Modern electronic devices demand high integration, high power handling, complex signal processing, and special physical layouts. With the rapid development of industries such as industry, energy, medicine, and communications, the quality requirements for PCBs are increasing. Therefore, it is necessary to inspect semi-finished products during the PCB production process. Semi-finished PCBs refer to circuit boards that have completed copper plating and etching but have not yet completed lamination.

[0003] Semi-thin circuit boards are generally thin. Traditional clamps can only clamp the two sides of the thin sheet and can only clamp a single size of thin sheet. After clamping, unevenness may occur, which makes it impossible to ensure that the entire thin sheet is straight when straightening it. Utility Model Content

[0004] In view of this, the present invention provides a sheet clamp to solve the problems of traditional clamps that can only clamp sheets of a single size and cannot ensure that the entire sheet is in a straight state.

[0005] This utility model provides a sheet clamp, comprising:

[0006] The main frame has a rectangular hollow area;

[0007] A fixing clamp assembly is fixedly connected to the two adjacent sides of the hollow area;

[0008] The movable clamping assembly is slidably connected to the other two sides of the hollow area, forming an adjustable clamping area with the fixed clamping assembly.

[0009] In this application, the four sides of the sheet can be gripped by a fixed clamping assembly and a movable clamping assembly, respectively, which can prevent the sheet from becoming uneven after clamping and ensure that the sheet is straight when it is straightened. The movable clamping assembly is slidably connected to the other two sides of the hollow area and forms an adjustable clamping area with the fixed clamping assembly, which can realize the gripping of sheets of different sizes.

[0010] In one optional embodiment, both the fixed clamp assembly and the movable clamp assembly include at least one clamping unit, the clamping unit comprising:

[0011] The lower clamping plate has a clamping surface;

[0012] The upper clamping plate is movably connected to the lower clamping plate;

[0013] A cylinder assembly adapted to drive the upper clamping plate to open and close to clamp the sheet.

[0014] In this application, the sheet can be placed on the clamping plane, and the upper clamping plate can be opened and closed by the cylinder assembly, so that the upper and lower clamping plates clamp the edge position of the sheet.

[0015] In one alternative embodiment, the lower clamping plate of the movable clamping assembly is connected to the main frame via a sliding assembly;

[0016] The sliding component includes:

[0017] A sliding groove is opened along the side of the main frame;

[0018] An adjusting bolt passes through the slide groove and is screwed to the lower clamping plate of the movable clamping assembly. The adjusting bolt is adapted to lock the lower clamping plate of the movable clamping assembly onto the slide groove.

[0019] In this application, the lower clamping plate of the movable clamping assembly can slide along the extension direction of the slide groove, the size of the adjustable clamping area can be adjusted according to the size of the sheet, and the movable clamping assembly can be fixed in the adjustment position by adjusting bolts.

[0020] In one alternative embodiment, the lower clamping plate of the movable clamping assembly is connected to a mounting plate, which is adapted to be locked to a slide by adjusting bolts.

[0021] In one optional embodiment, the clamping planes of the lower clamping plate are located on the same horizontal plane, ensuring the flatness of the sheet.

[0022] In one alternative embodiment, the cylinder assembly includes:

[0023] The cylinder body is located in the groove of the lower clamping plate, and the lower clamping plate has a limiting block to prevent the cylinder body from disengaging from the groove.

[0024] The piston is slidably disposed within the cylinder body, connected to an inflation assembly, and is driven to extend and retract by the inflation assembly.

[0025] The rotating plate is rotatably connected to the cylinder body via a rotating pin and is also connected to the upper clamping plate;

[0026] The piston is adapted to push the upper clamping plate to control the opening and closing of the upper clamping plate.

[0027] In this application, the rotating plate can act as a lever, and the piston can apply torque to the upper clamping plate, causing the rotating plate to rotate around the rotating pin shaft, thereby driving the upper clamping plate to close relative to the lower clamping plate, thus realizing the clamping of the sheet.

[0028] In one alternative embodiment, the cylinder assembly further includes an opening and closing spring, embedded in the cylinder body, adapted to provide a resetting force for the upper clamping plate. When it is necessary to loosen or disassemble the sheet, the opening and closing spring can reset the upper clamping plate, causing the upper clamping plate to open relative to the lower clamping plate.

[0029] In one alternative embodiment, the cylinder assembly further includes a push spring embedded in the cylinder body, the push spring driving the cylinder body away from the adjustable clamping area when an external force is released.

[0030] In this application, when clamping the sheet, after moving the lower clamping plate of the movable clamping assembly to the adjusted position according to the size of the sheet, the lower clamping plate or mounting plate of the movable clamping assembly can be fixed first by adjusting bolts. The sheet is placed on the clamping plane, and under the action of external force, the upper clamping plate moves towards the position of the sheet, causing the upper clamping plate to drive the cylinder body towards the position of the sheet. During this process, the push spring and the groove sidewall of the lower clamping plate generate force and are in a compressed spring state. The edge of the sheet is clamped by adjusting the upper clamping plate. After releasing the external force, the push spring releases the external force, driving the cylinder body away from the adjustable clamping area. Under the action of friction between the upper clamping plate and the sheet, the sheet can be straightened.

[0031] In one alternative embodiment, multiple clamping units are detachably mounted on the mounting plate along its extension direction. The number of clamping units can be adjusted according to the size of the sheet, preventing interference between the moving clamping assemblies during movement.

[0032] In one alternative embodiment, the lower clamping plate of the fixing fixture assembly is integrally formed or fixedly connected to the main frame. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0035] Figure 2 This is a partially enlarged schematic diagram of embodiment A of this utility model;

[0036] Figure 3 This is a schematic diagram showing the position of the rotating pin in an embodiment of this utility model;

[0037] Figure 4This is a schematic diagram showing the position of the rotating plate in an embodiment of the present invention.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Main frame; 2. Fixed clamp assembly; 3. Moving clamp assembly; 4. Lower clamp plate; 5. Upper clamp plate; 6. Slide groove; 7. Adjusting bolt; 8. Adjusting block; 9. Mounting plate; 10. Cylinder body; 11. Limiting block; 12. Piston; 13. Rotating pin; 14. Opening and closing spring; 15. Push spring; 16. Rotating plate. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] In today's era of rapid development in electronic information technology, all kinds of electronic devices rely on PCB circuit boards. Modern electronic devices demand high integration, high power handling, complex signal processing, and special physical layouts. With the rapid development of industries such as industry, energy, medicine, and communications, the quality requirements for PCBs are increasing. Therefore, it is necessary to inspect semi-finished products during the PCB production process. Semi-finished PCBs refer to circuit boards that have completed copper plating and etching but have not yet completed lamination.

[0042] Semi-thin circuit boards are generally thin, and traditional fixtures cannot effectively hold and test them. Thin board fixtures have higher requirements for our testing equipment fixtures. The board under test cannot be uneven after being clamped. Therefore, we need to design a more stable fixture.

[0043] Traditional fixtures typically consist of an upper clamp and a lower clamp. Before placing the board, the pneumatic clamp opens; after the board is placed in, the upper and lower clamps close, and the upper clamp lifts upwards to keep the board taut. However, as PCBs become increasingly thinner, the upper and lower clamps cannot completely guarantee that the board is taut, leading to decreased testing efficiency and failure to meet testing requirements.

[0044] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0045] According to embodiments of the present invention, such as Figures 1 to 4 As shown, a sheet clamp is provided, comprising:

[0046] Main frame 1 has a rectangular hollow area;

[0047] Fixture assembly 2 is fixedly connected to the two adjacent sides of the hollow region;

[0048] The movable clamp assembly 3 is slidably connected to the other two sides of the hollow area, forming an adjustable clamping area with the fixed clamp assembly 2.

[0049] In this application, the four sides of the sheet can be gripped by the fixed clamp assembly 2 and the movable clamp assembly 3 respectively, which can prevent the sheet from becoming uneven after clamping and ensure that the sheet is straight when it is straightened. The movable clamp assembly 3 is slidably connected to the other two sides of the hollow area and forms an adjustable clamping area with the fixed clamp assembly 2, which can realize the gripping of sheets of different sizes.

[0050] In one optional embodiment, both the fixed clamp assembly 2 and the movable clamp assembly 3 include at least one clamping unit, such as... Figures 3 to 4 As shown, the clamping unit includes:

[0051] The lower clamping plate 4 has a clamping plane; the clamping plane can be set on the side of the cylinder body 10 near the adjustable clamping area.

[0052] The upper clamping plate 5 is movably connected to the lower clamping plate 4; wherein, the upper clamping plate 5 may be provided with a plane adapted to the clamping plane for clamping the thin sheet.

[0053] A cylinder assembly is provided to drive the upper clamping plate 5 to open and close to clamp the sheet. The cylinder assembly may include a cylinder connected between the upper clamping plate 5 and the lower clamping plate 4, which moves the upper clamping plate 5 and the lower clamping plate 4 closer and further apart by extending and retracting the cylinder, thereby achieving opening and closing.

[0054] In this application, the sheet can be placed on the clamping plane, and the upper clamping plate 5 can be opened and closed by the cylinder assembly, so that the upper clamping plate 5 and the lower clamping plate 4 can clamp the edge position of the sheet.

[0055] In one alternative implementation, such as Figures 1 to 2 As shown, the lower clamping plate 4 of the movable clamping assembly 3 is connected to the main frame 1 via a sliding assembly;

[0056] The sliding component includes:

[0057] A sliding groove 6 is formed along the side of the main frame 1; there can be four sliding grooves 6, which are respectively set on the four sides of the rectangular hollow area and are parallel to the sides. One side of the sliding groove can be provided with a scale for marking the sliding groove.

[0058] An adjusting bolt 7 passes through the slide groove 6 and is screwed to the lower clamping plate 4 of the movable clamping assembly 3. The adjusting bolt 7 is adapted to lock the lower clamping plate 4 of the movable clamping assembly 3 onto the slide groove 6. Specifically, the head size of the adjusting bolt 7 can be larger than the width of the slide groove 6. The lower clamping plate 4 of the movable clamping assembly 3 and the head of the adjusting bolt 7 are respectively located on both sides of the main frame 1. The lower clamping plate 4 of the movable clamping assembly 3 can be locked onto the slide groove 6 by turning the adjusting bolt 7. Alternatively, the sliding assembly may also include an adjusting block 8. The adjusting bolt 7 is screwed onto the adjusting block 8 and passes through the slide groove 6. The size of the adjusting block 8 can be larger than the width of the slide groove 6. The lower clamping plate 4 of the movable clamping assembly 3 and the adjusting block 8 are respectively located on both sides of the main frame 1. The lower clamping plate 4 of the movable clamping assembly 3 can be locked onto the slide groove 6 by turning the adjusting bolt 7.

[0059] In this application, the lower clamping plate 4 of the movable clamping assembly 3 can slide along the extension direction of the slide groove 6, the size of the adjustable clamping area can be adjusted according to the size of the sheet, and the movable clamping assembly 3 can be fixed in the adjustment position by adjusting bolt 7.

[0060] In one alternative implementation, such as Figure 1 and Figure 3 As shown, the lower clamping plate 4 of the movable clamping assembly 3 is connected to a mounting plate 9, which is adapted to be locked to the sliding groove 6 by adjusting bolts 7. There can be two movable clamping assemblies 3, slidably connected to the other two sides of the hollow area respectively. The mounting plate 9 can be disposed on the lower clamping plate 4 of one of the movable clamping assemblies 3, and the mounting plate 9 is located on the side of the lower clamping plate 4 of the other movable clamping assembly 3 away from the upper clamping plate 5. This ensures that the movement between the two movable clamping assemblies 3 will not interfere when adjusting their positions, and that the clamping planes are coplanar.

[0061] In one optional embodiment, the clamping planes of the lower clamping plate 4 are located on the same horizontal plane. All clamping planes are coplanar, ensuring the flatness of the sheet.

[0062] In one alternative embodiment, the cylinder assembly includes:

[0063] The cylinder body 10 is located within the groove of the lower clamping plate 4, which has a limiting block 11 to prevent the cylinder body 10 from disengaging from the groove. The cylinder body 10 may have a protrusion adapted to the limiting block 11, which limits the protrusion in a direction away from the groove. It should be noted that the limiting block 11 in the moving clamp assembly 3 may not be fixedly connected to the cylinder body 10, while the limiting block 11 in the fixed clamp assembly 2 may be fixedly connected to the cylinder body 10.

[0064] Piston 12 is slidably disposed within the cylinder body 10, connected to an inflation assembly, and extended and retracted by the inflation assembly. The number of pistons 12 can be two, but this embodiment is not limited to this. The inflation assembly can be an air pump, and the piston 12 can move towards the upper clamping plate 5 under the action of the inflation assembly. The piston 12 can be disposed on the rotating plate 16 on the side away from the adjustable clamping area.

[0065] The rotating plate 16 is rotatably connected to the cylinder body 10 via a rotating pin 13 and is connected to the upper clamping plate 5; the rotating pin 13 can be embedded in the cylinder body 10.

[0066] The piston 12 is adapted to push the upper clamping plate 5 to control the opening and closing of the upper clamping plate 5.

[0067] The cylinder body 10 may be provided with grooves for guiding the piston 12 and accommodating the rotating plate 16 and the rotating pin 13. The upper clamping plate 5 may be detachably connected to the rotating plate 16 by bolts. In the moving clamp assembly 3, a gap may be provided between the groove of the lower clamping plate 4 and the cylinder body 10 in the direction of the cylinder body 10 toward the adjustable clamping area, so that the cylinder body 10 may move along the groove of the lower clamping plate 4 toward the adjustable clamping area under the action of the limiting block 11.

[0068] In this application, the rotating plate 16 is supported by the rotating pin 13 and can act as a lever. The piston 12 can apply torque to the upper clamping plate 5, which is equivalent to applying torque to the rotating plate 16, so that the rotating plate 16 rotates around the rotating pin 13, thereby driving the upper clamping plate 5 to close relative to the lower clamping plate 4, thereby realizing the clamping of the thin sheet.

[0069] In an alternative embodiment, the cylinder assembly further includes an opening / closing spring 14, embedded in the cylinder body 10, adapted to provide a restoring force for the upper clamping plate 5. When it is necessary to loosen or disassemble the sheet, the opening / closing spring 14 can cause the upper clamping plate 5 to return to its original position, thereby opening the upper clamping plate 5 relative to the lower clamping plate 4.

[0070] It should be noted that the cylinder body 10 may be provided with a groove for accommodating the opening and closing spring 14. The opening and closing spring 14 may be located on the side of the rotating plate 16 away from the piston 12, that is, on the side close to the clamping plane. There may be two opening and closing springs 14, respectively located on both sides of the groove accommodating the rotating plate 16. The opening of the groove accommodating the opening and closing spring 14 faces the upper clamping plate 5. When the upper clamping plate 5 rotates with the rotating plate 16 under the action of the piston 12, it can abut against the opening and closing spring 14, so that the opening and closing spring 14 is in a compressed state.

[0071] In one alternative embodiment, the cylinder assembly further includes a push spring 15 embedded in the cylinder body 10. The push spring 15 drives the cylinder body 10 away from the adjustable clamping area when an external force is released. The cylinder body 10 may have a groove for accommodating the push spring 15, with the groove facing the sidewall of the recess near the adjustable clamping area. Two push springs 15 may be present.

[0072] In this application, when clamping the sheet, after moving the lower clamping plate 4 of the movable clamping assembly 3 to the adjusted position according to the size of the sheet, the lower clamping plate 4 or the mounting plate 9 of the movable clamping assembly 3 can be fixed first by adjusting the bolt 7. The sheet is placed on the clamping plane, and the upper clamping plate 5 is moved towards the sheet under the action of external force, causing the upper clamping plate 5 to drive the cylinder body 10 towards the sheet. During this process, the push spring 15 interacts with the groove sidewall of the lower clamping plate 4 and is in a compressed spring state. The edge of the sheet is clamped by adjusting the upper clamping plate 5. After releasing the external force, the push spring 15 releases the external force, driving the cylinder body 10 away from the adjustable clamping area. Under the action of friction between the upper clamping plate 5 and the sheet, the sheet can be straightened. Friction plates can be provided in the area of ​​the upper clamping plate 5 opposite to the clamping plane to increase the friction between the upper clamping plate 5 and the sheet. The upper clamping plate 5 and the lower clamping plate 4 can clamp the edges of the sheet, for example, clamp the edge of the PCD substrate. If the friction of the upper clamping plate 5 or the lower clamping plate 4 on the sheet does not affect the performance of the sheet.

[0073] In one alternative embodiment, multiple clamping units are detachably mounted on the mounting plate 9 along its extending direction. The number of clamping units can be adjusted according to the size of the sheet, thus preventing interference from the moving clamping assembly 3 during movement. Figures 1 to 3 As shown, there are two movable clamping assemblies 3. One movable clamping assembly 3 is equipped with a mounting plate 9, on which multiple clamping units are detachably mounted. The mounting plate 9 is connected to an adjusting bolt 7. The lower clamping plate 4 of the other movable clamping assembly 3 is also connected to the adjusting bolt 7. The corresponding clamping units on the mounting plate 9 can be removed according to the size of the sheet, causing motion interference when adjusting the two movable clamping assemblies 3. Essentially, the lower clamping plate 4 of the other movable clamping assembly 3 moves along the area of ​​the mounting plate 9 where no clamping units are located. The movement directions of the two movable clamping assemblies 3 are perpendicular. The lengths of the multiple clamping units can vary.

[0074] In one optional embodiment, the lower clamping plate 4 of the fixing clamp assembly 2 is integrally formed or fixedly connected to the main frame 1.

[0075] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A sheet clamp, characterized in that, include: The main frame (1) has a rectangular hollow area; The fixing fixture assembly (2) is fixedly connected to the two adjacent sides of the hollow area; The movable clamp assembly (3) is slidably connected to the other two sides of the hollow area, forming an adjustable clamping area with the fixed clamp assembly (2); Both the fixed clamp assembly (2) and the movable clamp assembly (3) include at least one clamping unit, the clamping unit comprising: The lower clamping plate (4) has a clamping plane; The upper clamping plate (5) is movably connected to the lower clamping plate (4); A cylinder assembly adapted to drive the upper clamping plate (5) to open and close to clamp the sheet.

2. The sheet clamp according to claim 1, characterized in that: The lower clamping plate (4) of the movable clamping assembly (3) is connected to the main frame (1) via a sliding assembly; The sliding component includes: A sliding groove (6) is opened along the side of the main frame (1); An adjusting bolt (7) passes through the slide groove (6) and is screwed to the lower clamping plate (4) of the moving clamping assembly (3). The adjusting bolt (7) is adapted to lock the lower clamping plate (4) of the moving clamping assembly (3) onto the slide groove (6).

3. The sheet clamp according to claim 2, characterized in that: The lower clamping plate (4) of the movable clamping assembly (3) is connected to a mounting plate (9), which is adapted to be locked with a slide groove (6) by adjusting bolts (7).

4. The sheet clamp according to claim 1, characterized in that: The clamping plane of the lower clamping plate (4) is located on the same horizontal plane.

5. The sheet clamp according to claim 1, characterized in that: The cylinder assembly includes: The cylinder body (10) is located in the groove of the lower clamping plate (4), and the lower clamping plate (4) has a limiting block (11) to prevent the cylinder body (10) from disengaging from the groove. The piston (12) is slidably disposed inside the cylinder body (10), connected to an inflation assembly, and is driven to extend and retract by the inflation assembly; The rotating plate (16) is rotatably connected to the cylinder body (10) via the rotating pin (13) and is connected to the clamping plate (5). The piston (12) is adapted to push the upper clamping plate (5) to control the opening and closing of the upper clamping plate (5).

6. The sheet clamp according to claim 5, characterized in that: The cylinder assembly also includes an opening and closing spring (14), which is embedded in the cylinder body (10) and is adapted to provide the upper clamping plate (5) with a reset spring force.

7. The sheet clamp according to claim 5, characterized in that: The cylinder assembly also includes a push spring (15) embedded in the cylinder body (10), which drives the cylinder body (10) away from the adjustable clamping area when the external force is released.

8. The sheet clamp according to claim 1, characterized in that: Multiple clamping units are detachably mounted on the mounting plate (9) along the extension direction of the mounting plate (9).

9. The sheet clamp according to claim 1, characterized in that: The lower clamping plate (4) of the fixed clamping assembly (2) is integrally formed or fixedly connected to the main frame (1).

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