Pressure maintaining clamp

Abstract

The utility model relates to the technical field of assembly, and discloses a pressure maintaining clamp which comprises a first cover body, a second cover body and reinforcing ribs, and in the uncovering state, the first cover body and the second cover body are separated; in the cover closing state, the first cover body is connected with the second cover body; the number of the reinforcing ribs is multiple, the reinforcing ribs are arranged on the side, away from the press fit space, of at least one of the first cover body and the second cover body, the thickness of each reinforcing rib is F, F is larger than A * 1.5 mm and smaller than A * 2 mm, and A is larger than or equal to 1 and smaller than or equal to 2. The reinforcing ribs are arranged on the sides, far away from the pressing space, of the first cover body and the second cover body, so that the rigidity of the first cover body and the second cover body is improved, the glue coverage rate is guaranteed by limiting the thickness of the reinforcing ribs, meanwhile, the situation that force transmitted by the first cover body and the second cover body to a workpiece to be machined is large, and the workpiece to be machined is damaged is avoided. And overvoltage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of assembly and fitting, in particular to a pressure-maintaining clamp. Background Art

[0002] With the continuous development of science and technology, electronic devices play an increasingly important role in people's lives. In the production process of electronic devices, a pressure-holding fixture is often used to bond two independent parts together. In the prior art, a punching machine acts on the upper and lower covers of the fixture to provide pressure so that the parts to be bonded are in full contact with the applied glue. However, due to the low rigidity of the upper and lower covers, under the action of the punching machine, the pressure transmitted from the upper and lower covers to the parts to be bonded is low, resulting in large deformation of the product after pressure holding and failure to meet the flatness requirements. Utility Model Content

[0003] In view of this, the utility model provides a pressure-maintaining fixture to solve the problem that the product is greatly deformed after pressure-maintaining and fails to meet the flatness requirement.

[0004] In the first aspect, the utility model provides a pressure-maintaining clamp, including a first cover body, a first pressing surface is formed on one side of the first cover body; a second cover body, which is detachably connected to the first cover body, and a second pressing surface is formed on the side of the second cover body facing the first cover body, the pressure-maintaining clamp has an open cover state and a closed cover state, in which the first cover body and the second cover body are separated; in the closed cover state, the first cover body and the second cover body are connected, and the first pressing surface and the second pressing surface are spaced apart to form a pressing space, and the pressing space is suitable for placing a workpiece to be processed; a plurality of reinforcing ribs are provided, and the plurality of reinforcing ribs are connected to a side of the first cover body away from the pressing space, and / or a side of the second cover body away from the pressing space, the surface where the thickness direction of the reinforcing rib is located is connected to the first cover body and / or the second cover body, and the thickness of the reinforcing rib is F, satisfying A×1.5mm<F<A×2mm, where 1≤A≤2.

[0005] Beneficial effect: By arranging reinforcing ribs on the side of the first cover body and the second cover body away from the pressing space, the rigidity of the first cover body and the second cover body is improved, and by limiting the thickness of the reinforcing ribs, while ensuring the glue coverage rate, the first cover body and the second cover body are prevented from transmitting a large force to the workpiece to be processed, thereby avoiding overpressure.

[0006] In an optional embodiment, the height of the reinforcing rib is H, satisfying A×20mm<H<A×30mm.

[0007] Beneficial effect: By limiting the height of the reinforcing ribs, the rigidity of the first cover body and the second cover body is further corrected, thereby improving the flatness of the workpiece after pressure maintenance.

[0008] In an optional embodiment, along the thickness direction of the reinforcing ribs, the distance between two adjacent reinforcing ribs is L, satisfying A×20mm<L<A×30mm.

[0009] Beneficial effect: By limiting the distance between two adjacent reinforcing ribs, the rigidity of the first cover body and the second cover body is further corrected, thereby improving the flatness of the workpiece after pressure maintenance.

[0010] In an optional embodiment, the pressure-maintaining fixture further includes a buffer component, which is disposed on the first pressing surface and is suitable for being fitted with the workpiece to be processed.

[0011] Beneficial effect: By providing a buffer, the first pressing surface is prevented from directly contacting with the workpiece to be processed, thereby preventing the workpiece to be processed from being damaged. At the same time, the compression amount of the buffer is utilized to maintain the pressure, thereby ensuring that the glue is evenly spread.

[0012] In an optional embodiment, the pressure-maintaining clamp also includes a clip and a slot, the clip is arranged on one of the first cover body and the second cover body, the slot is arranged on the other of the first cover body and the second cover body, the slot is arranged corresponding to the clip, in the open cover state, the clip is separated from the slot, and in the closed cover state, the clip is inserted into the slot.

[0013] Beneficial effect: By using the clamping piece to fix and clamp the first cover body and the second cover body, the opening and closing method of the first cover body and the second cover body is simple and easy to operate.

[0014] In an optional embodiment, the pressure maintaining clamp also includes a protrusion and a guide pin, the protrusion is arranged on one of the first cover body and the second cover body, and the guide pin is arranged on the other of the first cover body and the second cover body. A guide groove is opened on the protrusion, and the guide pin is arranged corresponding to the guide groove. In the open cover state, the guide pin is separated from the guide groove, and in the closed cover state, the guide pin is inserted into the guide groove.

[0015] Beneficial effect: By providing the guide pins and the guide grooves, the first cover body and the second cover body can be quickly and accurately positioned when the pressure-maintaining fixture is closed, thereby improving work efficiency.

[0016] In an optional embodiment, the pressure-maintaining clamp further includes a limit assembly, wherein the limit assembly is disposed between the first cover body and the second cover body, and in the closed state, the limit assembly is suitable for limiting the distance between the first pressing surface and the second pressing surface.

[0017] Beneficial effect: By setting a limit assembly, the distance between the first pressing surface and the second pressing surface is limited to prevent uneven glue distribution due to over-pressing of the product, thereby preventing the flatness of the workpiece after pressure maintenance.

[0018] In an optional embodiment, the limiting assembly includes a first limiting column and a second limiting column, the first limiting column is arranged on the first cover body, the second limiting column is arranged on the second cover body, the first limiting column and the second limiting column are arranged correspondingly, in the open cover state, the first limiting column is separated from the second limiting column, and in the closed cover state, the two end faces of the first limiting column and the second limiting column that are relatively arranged are abutted.

[0019] In an optional embodiment, the pressure-maintaining fixture further includes a positioning member, the positioning member is connected to the second cover body, the positioning member is arranged corresponding to the second pressing surface, and the positioning member is suitable for positioning the position of the workpiece to be processed.

[0020] Beneficial effect: By setting the positioning parts, the positioning accuracy of the pressure-holding fixture on the workpiece to be processed is further improved, preventing the workpiece from being misplaced and causing uneven glue distribution, thereby affecting the flatness of the workpiece after pressure holding.

[0021] In an optional embodiment, the pressure-maintaining clamp further includes a hand-held portion, and the hand-held portion is disposed on the first cover body.

[0022] Beneficial effect: By providing the hand-held portion, it is easy to take and hold the first cover body, thereby improving the convenience of the pressure-maintaining clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a structural exploded diagram of the pressure-maintaining fixture of an embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the reinforcing ribs of an embodiment of the utility model;

[0026] Figure 3 This is a structural schematic diagram of a first cover body according to an embodiment of the utility model;

[0027] Figure 4 This is a structural schematic diagram of another first cover body of an embodiment of the utility model;

[0028] Figure 5 for Figure 1 Enlarged schematic diagram at point A in the middle.

[0029] Description of reference numerals:

[0030] 10. First cover body; 11. First pressing surface; 12. Slot; 13. Protrusion; 131. Guide groove; 14. First bottom plate; 15. First side plate; 20. Second cover body; 21. Second pressing surface; 22. Guide pin; 30. Reinforcing rib; 40. Buffer; 50. Snap-in member; 61. First limiting column; 62. Second limiting column; 70. Positioning member; 80. Hand-held portion; 90. Workpiece to be processed. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] Combine the following Figures 1 to 5 , describing an embodiment of the utility model.

[0033] According to an embodiment of the utility model, on the one hand, a pressure-maintaining fixture is provided, comprising a first cover body 10, a second cover body 20 and a reinforcing rib 30. A first pressing surface 11 is formed on one side of the first cover body 10; the second cover body 20 is detachably connected to the first cover body 10, and a second pressing surface 21 is formed on the side of the second cover body 20 facing the first cover body 10. The pressure-maintaining fixture has an open cover state and a closed cover state. In the open cover state, the first cover body 10 and the second cover body 20 are separated; in the closed cover state, the first cover body 10 and the second cover body 20 are connected, and the first pressing surface 11 and the second pressing surface 21 are arranged at intervals to form a pressing space, and the pressing space is suitable for placing a workpiece 90 to be processed; a plurality of reinforcing ribs 30 are provided, and the plurality of reinforcing ribs 30 are connected to the side of the first cover body 10 away from the pressing space and the side of the second cover body 20 away from the pressing space, and the thickness of the reinforcing rib 30 is F, satisfying A×1.5mm<F<A×2mm, where 1≤A≤2.

[0034] The pressure-maintaining clamp of this embodiment is applied, and the stiffness of the first cover body 10 and the second cover body 20 is improved by setting reinforcing ribs 30 on the side of the first cover body 10 and the second cover body 20 away from the pressing space. By limiting the thickness of the reinforcing ribs 30, while ensuring the glue coverage rate, it is prevented that the first cover body 10 and the second cover body 20 transmit a large force to the workpiece 90 to avoid overpressure.

[0035] It should be noted that the thickness of the reinforcing ribs 30 generally does not exceed 4 mm. When the size of the first cover body 10 or the second cover body 20 is larger, in order to ensure the glue coverage rate, it is only necessary to increase the number of arrangements of the reinforcing ribs 30 or the length of the reinforcing ribs 30 without increasing the thickness of the reinforcing ribs 30.

[0036] For details, please refer to Figure 1 , the workpiece 90 to be processed in this embodiment is a mobile device.

[0037] It should be noted that, for the convenience of production and processing, the value of A is mostly selected as an integer, and in this embodiment, the value of A is 1. It can be understood that when the value of A is a decimal, the thickness of the reinforcing rib 30 is mostly a decimal, so a higher processing accuracy is required to meet the thickness requirement of the reinforcing rib 30, which is not convenient for processing the reinforcing rib 30.

[0038] It should be noted that when F≤A×1.5mm, the rigidity of the pressure-holding clamp is still relatively low, the force transmitted to the workpiece 90 by the pressure-holding clamp is relatively small, and the coverage rate of the glue for bonding the workpiece 90 is low, which affects the flatness; when F≥A×2mm, the rigidity of the pressure-holding clamp is too high, the force transmitted to the workpiece 90 by the pressure-holding clamp is relatively large, resulting in overpressure and uneven distribution of the glue.

[0039] In other alternative embodiments, the reinforcing rib 30 can also be separately arranged on the side of the first cover 10 away from the pressing space or on the side of the second cover 20 away from the pressing space. That is, the reinforcing rib 30 is arranged on the side of the first cover 10 away from the pressing space; or, the reinforcing rib 30 is arranged on the side of the second cover 20 away from the pressing space.

[0040] For details, please refer to Figures 2 to 4The first cover body 10 includes a first bottom plate 14 and a first side plate 15. The first side plate 15 is arranged along the circumferential direction of the first bottom plate 14 and connected to the first bottom plate 14 to enclose a first groove. A portion of the first bottom plate 14 on one side close to the pressing space is protruded to form a first pressing surface 11. The reinforcing rib 30 is arranged in the first groove. The surface enclosed by the thickness direction and the length direction of the reinforcing rib 30 is parallel to the first pressing surface 11. One of the surfaces enclosed by the thickness direction and the length direction of the reinforcing rib 30 is fitted and connected to the first bottom plate 14; the surface enclosed by the thickness direction and the height direction of the reinforcing rib 30 is perpendicular to the first pressing surface 11. At least one of the surfaces enclosed by the thickness direction and the height direction of the reinforcing rib 30 is fitted and connected to the first side plate 15.

[0041] Of course, in other alternative embodiments, the reinforcing rib 30 may also be only closely connected to the first bottom plate 14 or the first side plate 15 .

[0042] Of course, in other alternative embodiments, the second cover body 20 includes a second bottom plate and a second side plate, the second side plate is arranged along the circumferential direction of the second bottom plate and is connected to the second bottom plate to enclose a second groove, and a portion of the second bottom plate on one side close to the pressing space is protruded to form a second pressing surface 21, and the reinforcing rib 30 is arranged in the second groove, and the surface enclosed by the thickness direction and the length direction of the reinforcing rib 30 is parallel to the second pressing surface 21, and one of the surfaces enclosed by the thickness direction and the length direction of the reinforcing rib 30 is fit-connected to the second bottom plate; the surface enclosed by the thickness direction and the height direction of the reinforcing rib 30 is perpendicular to the second pressing surface 21, and at least one of the surfaces enclosed by the thickness direction and the height direction of the reinforcing rib 30 is fit-connected to the second side plate.

[0043] In one embodiment, Figure 2 and Figure 3 As shown, the height of the reinforcing rib 30 is H, satisfying A×20mm<H<A×30mm.

[0044] It should be noted that when H≤A×20mm, the rigidity of the pressure-holding clamp is still relatively low, the force transmitted to the workpiece 90 by the pressure-holding clamp is relatively small, and the coverage rate of the glue for bonding the workpiece 90 is low, which affects the flatness; when H≥A×30mm, the rigidity of the pressure-holding clamp is too high, the force transmitted to the workpiece 90 by the pressure-holding clamp is relatively large, resulting in overpressure and uneven distribution of the glue.

[0045] It is worth noting that, by limiting the height of the reinforcing ribs 30 , the rigidity of the first cover body 10 and the second cover body 20 is further corrected, thereby improving the flatness of the workpiece 90 after pressure maintenance.

[0046] In one embodiment, along the thickness direction of the reinforcing ribs 30 , the distance between two adjacent reinforcing ribs 30 is L, satisfying A×20 mm<L<A×30 mm.

[0047] It should be noted that when H≤A×20mm, the rigidity of the pressure-holding clamp is still relatively low, the force transmitted to the workpiece 90 by the pressure-holding clamp is relatively small, and the coverage rate of the glue for bonding the workpiece 90 is low, which affects the flatness; when H≥A×30mm, the rigidity of the pressure-holding clamp is too high, the force transmitted to the workpiece 90 by the pressure-holding clamp is relatively large, resulting in overpressure and uneven distribution of the glue.

[0048] It is worth noting that, by limiting the distance between two adjacent reinforcing ribs 30 , the rigidity of the first cover body 10 and the second cover body 20 is further corrected, thereby improving the flatness of the workpiece 90 after pressure maintenance.

[0049] For details, please refer to Figure 3 The reinforcing ribs 30 are divided into two groups. The reinforcing ribs 30 in each group are arranged in parallel. The two groups of reinforcing ribs 30 are arranged at an angle to form a mesh. The distance between two adjacent reinforcing ribs 30 is the parallel spacing of the reinforcing ribs 30 in each group.

[0050] In one embodiment, the pressure-maintaining fixture further includes a buffer member 40 , which is disposed on the first pressing surface 11 , and is suitable for being fitted with the workpiece 90 to be processed.

[0051] Specifically, the buffer member 40 is foam.

[0052] For further information, see Figure 1 The shape of the buffer member 40 is adjusted according to the shape of the part to be bonded to the workpiece 90 .

[0053] It is worth noting that by providing the buffer member 40 , direct contact between the first pressing surface 11 and the workpiece 90 to be processed is avoided, thereby preventing damage to the workpiece 90 . At the same time, the compression amount of the buffer member 40 is used to maintain the pressure and ensure that the glue is evenly spread.

[0054] In one embodiment, the pressure-maintaining clamp also includes a snap-fit ​​component 50 and a slot 12. The snap-fit ​​component 50 is arranged on the first cover body 10, and the slot 12 is opened on the second cover body 20. The slot 12 is arranged corresponding to the snap-fit ​​component 50. When the cover is opened, the snap-fit ​​component 50 is separated from the slot 12. When the cover is closed, the snap-fit ​​component 50 is inserted into the slot 12.

[0055] Specifically, a plurality of the clamping members 50 are provided.

[0056] In other alternative embodiments, the clamping member 50 may also be disposed on the second cover body 20 , and the clamping slot 12 is opened on the first cover body 10 .

[0057] In other alternative embodiments, the clamping member 50 and the clamping slot 12 may also be provided on the first cover body 10 and the second cover body 20 at the same time, and the clamping slot 12 is provided corresponding to the clamping member 50 .

[0058] It is worth noting that by using the clamping member 50 to fix and clamp the first cover body 10 and the second cover body 20 , the opening and closing method of the first cover body 10 and the second cover body 20 is simple and easy to operate.

[0059] In other alternative embodiments, the clamping member 50 may be replaced by a fixing bolt, the clamping groove 12 may be replaced by a threaded groove, and the fixing bolt may be tightened by using a torque-limiting wrench.

[0060] In one embodiment, the pressure-maintaining clamp also includes a protrusion 13 and a guide pin 22. The protrusion 13 is arranged on the first cover body 10, and a guide groove 131 is opened on the protrusion 13. The guide pin 22 is arranged on the second cover body 20. The guide pin 22 is arranged corresponding to the guide groove 131. In the open cover state, the guide pin 22 is separated from the guide groove 131. In the closed cover state, the guide pin 22 is inserted into the guide groove 131.

[0061] In other alternative embodiments, the protrusion 13 may also be disposed on the second cover body 20 , and the guide pin 22 may be disposed on the first cover body 10 .

[0062] In other alternative embodiments, the protrusion 13 and the guide pin 22 may also be provided on the first cover body 10 and the second cover body 20 at the same time.

[0063] It is worth noting that, by providing the guide pin 22 and the guide groove 131 , when the pressure-maintaining fixture is closed, the first cover body 10 and the second cover body 20 can be positioned quickly and accurately, thereby improving work efficiency.

[0064] In one embodiment, the pressure-maintaining fixture further includes a limiting assembly, which is disposed between the first cover body 10 and the second cover body 20 . In the closed state, the limiting assembly is suitable for limiting the distance between the first pressing surface 11 and the second pressing surface 21 .

[0065] It is worth noting that by setting a limit assembly, the distance between the first pressing surface 11 and the second pressing surface 21 is limited to prevent uneven glue distribution due to over-pressing of the product, thereby preventing the flatness of the workpiece 90 after pressure maintenance.

[0066] In one embodiment, the limiting assembly includes a first limiting column 61 and a second limiting column 62. The first limiting column 61 is arranged on the first cover body 10, and the second limiting column 62 is arranged on the second cover body 20. The first limiting column 61 and the second limiting column 62 are arranged correspondingly. In the open cover state, the first limiting column 61 is separated from the second limiting column 62. In the closed cover state, the two end faces of the first limiting column 61 and the second limiting column 62 that are relatively arranged are abutted.

[0067] In other alternative embodiments, only the first limiting column 61 may be provided, one end of the first limiting column 61 is connected to the first cover body 10 , and the other end of the first limiting column 61 abuts against the second cover body 20 in the closed state.

[0068] In other alternative embodiments, only the second limiting column 62 may be provided, one end of the second limiting column 62 is connected to the second cover body 20 , and the other end of the second limiting column 62 abuts against the first cover body 10 in the closed state.

[0069] In one embodiment, Figure 5 As shown, the pressure-maintaining fixture further includes a positioning member 70 , which is connected to the second cover body 20 . The positioning member 70 is arranged corresponding to the second pressing surface 21 , and is suitable for positioning the position of the workpiece 90 to be processed.

[0070] For details, please refer to Figure 5 The positioning member 70 is a boss, and the boss is arranged corresponding to the camera opening of the workpiece 90 to facilitate the positioning of the workpiece 90 to be processed.

[0071] Of course, in other alternative implementations, multiple positioning members 70 may be provided according to actual conditions; the positioning members 70 may also be provided in various shapes according to the structural shape of the workpiece 90 to be processed.

[0072] It is worth noting that by providing the positioning member 70 , the positioning accuracy of the pressure-holding fixture on the workpiece 90 is further improved, preventing the workpiece 90 from being misplaced and causing uneven glue distribution, thereby affecting the flatness of the workpiece 90 after pressure holding.

[0073] In one embodiment, the pressure-maintaining fixture further includes a hand-held portion 80 , and the hand-held portion 80 is disposed on the first cover body 10 .

[0074] For details, please refer to Figure 1 There are four hand-held parts 80 in total, and the four hand-held parts 80 are arranged on the first cover body 10 at intervals.

[0075] Of course, in other alternative implementations, the number and positions of the hand-held parts 80 may be adjusted according to actual conditions.

[0076] It is worth noting that, by providing the hand-held portion 80 , it is easy to take and hold the first cover body 10 , thereby improving the convenience of the pressure-maintaining fixture.

[0077] When using the pressure-maintaining clamp of this embodiment, first, the workpiece 90 is positioned using the positioning member 70 on the second cover body 20; then, the buffer member 40 is placed between the workpiece 90 and the first cover body 10; thereafter, the snap-fit ​​member 50 on the second cover body 20 is snapped into the snap-fit ​​groove 12 on the first cover body 10 to complete the closing of the cover; finally, pressure is applied to the first cover body 10 and the second cover body 20.

[0078] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A pressure-maintaining fixture, characterized in that: include: A first cover body (10), wherein a first pressing surface (11) is formed on one side of the first cover body (10); The second cover body (20) is detachably connected to the first cover body (10), and a second pressing surface (21) is formed on a side of the second cover body (20) facing the first cover body (10). The pressure-maintaining fixture has an open cover state and a closed cover state. In the open cover state, the first cover body (10) and the second cover body (20) are separated; in the closed cover state, the first cover body (10) and the second cover body (20) are connected, and the first pressing surface (11) and the second pressing surface (21) are spaced apart to form a pressing space, and the pressing space is suitable for placing the workpiece (90) to be processed; A plurality of reinforcing ribs (30) are provided, and the plurality of reinforcing ribs (30) are provided on a side of at least one of the first cover body (10) and the second cover body (20) away from the pressing space, and the thickness of the reinforcing ribs (30) is F, satisfying A×1.5mm<F<A×2mm, wherein 1≤A≤2.

2. The pressure-maintaining fixture according to claim 1, characterized in that: The height of the reinforcing rib (30) is H, satisfying A×20mm<H<A×30mm.

3. The pressure-maintaining fixture according to claim 1 or 2, characterized in that: Along the thickness direction of the reinforcing ribs (30), the distance between two adjacent reinforcing ribs (30) is L, satisfying A×20mm<L<A×30mm.

4. The pressure-maintaining fixture according to claim 1 or 2, characterized in that: The pressure-maintaining fixture further comprises a buffer component (40), wherein the buffer component (40) is arranged on the first pressing surface (11), and the buffer component (40) is suitable for being fitted with the workpiece (90) to be processed.

5. The pressure-maintaining fixture according to claim 1 or 2, characterized in that: The pressure-maintaining clamp also includes a snap-in component (50) and a slot (12); the snap-in component (50) is arranged on one of the first cover body (10) and the second cover body (20); the slot (12) is arranged on the other of the first cover body (10) and the second cover body (20); the slot (12) is arranged corresponding to the snap-in component (50); in the open cover state, the snap-in component (50) is separated from the slot (12); in the closed cover state, the snap-in component (50) is inserted into the slot (12).

6. The pressure-maintaining fixture according to claim 1 or 2, characterized in that: The pressure-maintaining clamp also includes a protrusion (13) and a guide pin (22), wherein the protrusion (13) is arranged on one of the first cover body (10) and the second cover body (20), and the guide pin (22) is arranged on the other of the first cover body (10) and the second cover body (20), and a guide groove (131) is opened on the protrusion (13), and the guide pin (22) is arranged corresponding to the guide groove (131). In the open cover state, the guide pin (22) is separated from the guide groove (131), and in the closed cover state, the guide pin (22) is inserted into the guide groove (131).

7. The pressure-maintaining fixture according to claim 1 or 2, characterized in that: The pressure-maintaining clamp further comprises a limit assembly, which is arranged between the first cover body (10) and the second cover body (20). In the closed state, the limit assembly is suitable for limiting the distance between the first pressing surface (11) and the second pressing surface (21).

8. The pressure-maintaining fixture according to claim 7, characterized in that: The limiting assembly comprises a first limiting column (61) and a second limiting column (62), wherein the first limiting column (61) is arranged on the first cover body (10), and the second limiting column (62) is arranged on the second cover body (20), and the first limiting column (61) and the second limiting column (62) are arranged correspondingly. In the open cover state, the first limiting column (61) and the second limiting column (62) are separated, and in the closed cover state, two end surfaces of the first limiting column (61) and the second limiting column (62) which are arranged oppositely are abutted.

9. The pressure-maintaining fixture according to claim 1 or 2, characterized in that: The pressure-maintaining fixture further comprises a positioning member (70), wherein the positioning member (70) is connected to the second cover body (20), the positioning member (70) is arranged corresponding to the second pressing surface (21), and the positioning member (70) is suitable for positioning the position of the workpiece (90) to be processed.

10. The pressure-maintaining fixture according to claim 1 or 2, characterized in that: The pressure-maintaining clamp further comprises a hand-held portion (80), and the hand-held portion (80) is arranged on the first cover body (10).

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