Pressure holding fixture

CN224621892UActive Publication Date: 2026-08-11BOZHON PRECISION IND TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-22
Publication Date
2026-08-11

AI Technical Summary

Technical Problem

[0005]本实用新型的目的在于提供一种保压治具,以解决现有技术中更换保压载具时调试时间长,调试效率低,影响用户体验的问题

Benefits of technology

[0026]本实用新型提供一种保压治具,该保压治具包括底座、第一导轨、承载座、保压组件、调节组件和若干个治具座,其中,第一导轨设于底座,且沿第一方向延伸;承载座滑动设于第一导轨,且在压载位置和装置位置之间切换;若干个治具座被配置为盛放不同型号的工件,且择一可拆卸连接于承载座;保压组件设于底座,保压组件的输出端能沿垂直于第一方向的第二方向移动以靠近或远离工件;调节组件设于底座,且其输出端的位置可调并在抵接承载座时限制承载座于压载位置。

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Abstract

This utility model relates to the field of pressure-holding technology, specifically disclosing a pressure-holding fixture. In this fixture, a first guide rail is disposed on a base and extends along a first direction; a support seat is slidably disposed on the first guide rail and can switch between a pressure-bearing position and a device position; several fixture seats are configured to hold workpieces of different types, and one of them is detachably connected to the support seat; a pressure-holding component is disposed on the base, and the output end of the pressure-holding component can move along a second direction perpendicular to the first direction to approach or move away from the workpiece; an adjustment component is disposed on the base, and the position of its output end is adjustable and restricts the support seat to the pressure-bearing position when it abuts against the support seat. This application, by rapidly adjusting the position of the output end of the adjustment component, enables the support seat after fixture seat replacement to be constrained to the pressure-bearing position after contact with the output end of the adjustment component, achieving rapid positioning of the fixture seat, thereby greatly improving the fixture seat replacement efficiency and enhancing the user experience.
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Description

Technical Field

[0001] This utility model relates to the field of pressure holding technology, and in particular to a pressure holding fixture. Background Technology

[0002] In the pressure holding process of 3C electronics components, different types of components are often encountered. Different types of components have different dimensions, and different pressure holding carriers need to be changed during the pressure holding process to ensure the stability of component installation and the stability of the pressure holding process.

[0003] In related technologies, multiple pressure-holding carriers of different models are typically set up and connected to the base by screws. When it is necessary to replace the pressure-holding carrier, a lot of time is required for disassembly and assembly, and the position of the pressure-holding carrier also needs to be adjusted. The adjustment process requires the use of other auxiliary tools, resulting in low adjustment efficiency and affecting the user experience.

[0004] Therefore, it is urgent to study a pressure-holding fixture to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a pressure-holding fixture to solve the problems of long debugging time, low debugging efficiency, and negative impact on user experience when changing pressure-holding fixtures in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Pressure holding fixture, including:

[0008] Base;

[0009] A first guide rail is disposed on the base and extends along a first direction;

[0010] The bearing seat is slidably mounted on the first guide rail and can switch between the ballast position and the device position;

[0011] Several fixture seats are configured to hold workpieces of different types, and one of them is detachably connected to the support seat;

[0012] A pressure-holding assembly is disposed on the base, and the output end of the pressure-holding assembly can move along a second direction perpendicular to the first direction to approach or move away from the workpiece;

[0013] An adjustment component is provided on the base, and the position of its output end is adjustable and restricts the bearing seat to the ballast position when it abuts the bearing seat.

[0014] As an optional technical solution for a pressure-holding fixture, the bearing seat is provided with a locking screw hole, and the fixture seat has a first elongated hole extending along a third direction that is simultaneously perpendicular to the first direction and the second direction. The locking screw passes through the first elongated hole and is screwed into the locking screw hole.

[0015] As an optional technical solution for a pressure-holding fixture, the fixture base includes a fixture body, wherein the fixture base includes a pin disposed on the fixture body, the workpiece has a insertion hole, and the pin is inserted into the insertion hole; and / or,

[0016] The fixture base includes at least two limiting blocks disposed on the fixture body, and the at least two limiting blocks form a limiting area for holding the workpiece.

[0017] As an optional technical solution for a pressure-holding fixture, the bearing seat includes a bearing body and a first stop provided on the bearing body. The bearing body is slidably disposed on the first guide rail. The base has a second stop, which abuts against the first stop to restrict the bearing seat to the loading position.

[0018] As an optional technical solution for a pressure-holding fixture, the adjustment component includes an adjustment block and a micrometer. The adjustment block is slidably disposed on the base along a first direction. The micrometer is disposed on the base, and the output end of the micrometer abuts against the adjustment block to limit the position of the adjustment block. The bearing seat located at the ballast position abuts against the adjustment block, and the adjustment block is located between the micrometer and the bearing seat.

[0019] As an optional technical solution for a pressure-holding fixture, the adjustment component further includes a first magnetic attractor, which is located at one end of the adjustment block facing the support seat. The support seat is made of magnetic material or a second magnetic attractor that is attracted to the first magnetic attractor is installed on the support seat.

[0020] As an optional technical solution for a pressure-holding fixture, the adjusting block has a second elongated hole extending along a first direction, and the base is provided with an adjusting screw hole, with the adjusting screw passing through the second elongated hole and screwed into the adjusting screw hole.

[0021] As an optional technical solution for a pressure-holding fixture, the pressure-holding assembly includes a pressure-holding base and a pressure-holding head. The base is provided with a second guide rail extending in a second direction. The pressure-holding base is slidably disposed on the second guide rail and moves between a pressing position and an lifting position. The pressure-holding base is provided with a third guide rail extending in a second direction, and the pressure-holding head is slidably disposed on the third guide rail.

[0022] As an optional technical solution for a pressure-holding fixture, the pressure-holding assembly further includes several pressure-holding counterweights, the weights of which are different, and the pressure-holding head has a bearing position to bear at least one of the pressure-holding counterweights.

[0023] As an optional technical solution for a pressure-holding fixture, the pressure-holding assembly further includes a buffer member, which is disposed on the base and abuts against the pressure-holding seat moved to the pressing position; and / or,

[0024] The pressure-holding assembly includes a limiting member, which is disposed on the base, and a gap is left between the pressure-holding seat in the pressed position and the limiting member.

[0025] This utility model has at least the following beneficial effects:

[0026] This utility model provides a pressure-holding fixture, which includes a base, a first guide rail, a support seat, a pressure-holding component, an adjustment component, and several fixture seats. The first guide rail is disposed on the base and extends along a first direction. The support seat is slidably disposed on the first guide rail and can switch between a pressure-bearing position and a device position. Several fixture seats are configured to hold workpieces of different types, and one of them is detachably connected to the support seat. The pressure-holding component is disposed on the base, and its output end can move along a second direction perpendicular to the first direction to approach or move away from the workpiece. The adjustment component is disposed on the base, and the position of its output end is adjustable and restricts the support seat to the pressure-bearing position when it abuts against the support seat.

[0027] By adjusting the position of the output end of the adjustment component, the position of the output end of the adjustment component can be quickly adjusted. This allows the bearing seat after the fixture seat is replaced to be in contact with the output end of the adjustment component and to be limited to the ballast position. This enables the fixture seat to be quickly positioned, which greatly improves the debugging efficiency of the fixture seat. No additional measuring tools are required, the operation is simple, and the user experience is improved. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0029] Figure 1 This is a first-view structural schematic diagram of the pressure-holding fixture in an embodiment of this utility model;

[0030] Figure 2 This is a structural schematic diagram of the pressure-holding fixture from a second perspective in an embodiment of this utility model;

[0031] Figure 3 This is a cross-sectional view of the pressure-holding fixture in an embodiment of this utility model;

[0032] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0033] In the picture:

[0034] 100. Base; 110. Second stop; 111. Magnetic component; 120. Buzzer;

[0035] 200. First guide rail;

[0036] 300, support base; 310, support body; 320, handle; 330, second magnetic suction element; 340, first stop element;

[0037] 400. Fixture base; 410. Fixture body; 411. First elongated hole; 420. Insertion pin; 430. Limiting block;

[0038] 500, Pressure holding assembly; 510, Pressure holding seat; 520, Pressure holding head; 530, Second guide rail; 540, Third guide rail; 550, Pressure holding counterweight; 560, Pressure holding pin; 570, Buffer; 580, Limiting component; 590, Elbow clamp mechanism;

[0039] 600. Adjustment component; 610. Adjustment block; 611. Second elongated hole; 620. Micrometer; 630. First magnetic chuck. Detailed Implementation

[0040] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0041] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0042] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0043] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0044] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0045] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0046] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0047] like Figures 1 to 4As shown, this embodiment provides a pressure-holding fixture, which includes a base 100, a first guide rail 200, a support seat 300, a pressure-holding component 500, an adjustment component 600, and a plurality of fixture seats 400. The first guide rail 200 is disposed on the base 100 and extends along a first direction. The support seat 300 is slidably disposed on the first guide rail 200 via a slider and can switch between a pressure-holding position and a device position. The plurality of fixture seats 400 are configured to hold workpieces of different types, and one of them is detachably connected to the support seat 300. The pressure-holding component 500 is disposed on the base 100, and the output end of the pressure-holding component 500 can move along a second direction perpendicular to the first direction to approach or move away from the workpiece. The adjustment component 600 is disposed on the base 100, and the position of its output end is adjustable and restricts the support seat 300 to the pressure-holding position when it abuts against the support seat 300.

[0048] With the help of the adjustment component 600, the position of the output end of the adjustment component 600 can be quickly adjusted, so that after the bearing seat 300 after replacing the jig seat 400 comes into contact with the output end of the adjustment component 600, it can be limited in the ballast position, realize the rapid positioning of the jig seat 400, thereby greatly improving the debugging efficiency of the jig seat 400. No additional measuring tools are required, the operation is simple, and the user experience is improved.

[0049] In some embodiments, the support 300 is provided with a locking screw hole, and the fixture 400 has a first elongated hole 411 extending along a third direction. A locking screw passes through the first elongated hole 411 and is screwed into the locking screw hole. This arrangement allows the position of the fixture 400 relative to the support 300 along the third direction to be adjustable, thereby accommodating a wider range of workpiece types. The third direction is perpendicular to both the first and second directions.

[0050] To facilitate workpiece positioning, in some embodiments, the fixture base 400 includes a fixture body 410 and insertion pins 420. The insertion pins 420 are disposed on the fixture body 410, and the workpiece has insertion holes into which the insertion pins 420 are inserted. Specifically, the fixture body 410 has three non-collinear insertion pins 420, and correspondingly, the workpiece has three insertion holes. The fixture base 400 includes at least two limiting blocks 430 disposed on the fixture body 410, forming a limiting area for holding the workpiece. The limiting blocks 430 are L-shaped, the workpiece is square, and the two limiting blocks 430 are positioned diagonally across the workpiece, thereby limiting the four sides of the workpiece.

[0051] After replacing the fixture seat 400 with a different model, the position of the bearing seat 300 needs to be adjusted to ensure that the workpiece is in the pressure-holding position. In some embodiments, the adjusting component 600 includes an adjusting block 610 and a micrometer 620. The adjusting block 610 is slidably disposed on the base 100 along a first direction, and the micrometer 620 is disposed on the base 100. The output end of the micrometer 620 abuts against the adjusting block 610 to limit the position of the adjusting block 610. The bearing seat 300, located in the pressure-holding position, abuts against the adjusting block 610, and the adjusting block 610 is located between the micrometer 620 and the bearing seat 300. With the help of the micrometer 620, after replacing the fixture seat 400, the position of the extended output end of the micrometer 620 can be adjusted according to its model, thereby adjusting the position of the adjusting block 610. This ensures that after the bearing seat 300 and the adjusting block 610 abut against each other, the workpiece on the fixture seat 400 is in the pressure-holding position, facilitating subsequent pressure-holding processes. The micrometer 620's output end extends precisely, allowing the workpiece to be accurately positioned in the pressure-holding position.

[0052] The support 300 includes a support body 310 and a first stop 340 disposed on the support body 310. The support body 310 is slidably disposed on the first guide rail 200 via a slider. The base 100 has a second stop 110, which abuts against the first stop 340 to restrict the support 300 to the loading position. At least one of the first stop 340 and the second stop 110 is equipped with a magnetic element 111 to attract the other. Exemplarily, both the first stop 340 and the second stop 110 are equipped with mutually attracting magnetic elements 111, so that the support 300 stops in the loading position. The magnetic element 111 is a magnet.

[0053] The support seat 300 includes a support body 310 and a handle 320 disposed on the support body 310. The support body 310 is slidably disposed on the first guide rail 200. The grip portion of the handle 320 is higher than the support body 310, so as to facilitate pushing and pulling the support seat 300 in the first direction and improve the convenience of operation.

[0054] During the pressure holding process, the support seat 300 needs to be maintained in the pressure-holding position to ensure pressure holding accuracy. Therefore, the adjusting assembly 600 also includes a first magnetic attractor 630, which is located at the end of the adjusting block 610 facing the support seat 300. The support seat 300 is made of magnetic material, or a second magnetic attractor 330 that attracts the first magnetic attractor 630 is mounted on the support seat 300. Specifically, both the first magnetic attractor 630 and the second magnetic attractor 330 are magnets. The adjusting block 610 has a first mounting groove in which the first magnetic attractor 630 is mounted, and the support seat 300 has a second mounting groove in which the second magnetic attractor 330 is mounted. The openings of the first and second mounting grooves are opposite each other.

[0055] Furthermore, the adjusting block 610 has two first mounting slots for correspondingly mounting two first magnetic members 630; the support base 300 has two second mounting slots for correspondingly mounting two second magnetic members 330. The two first magnetic members 630 are arranged at intervals along a third direction and are arranged correspondingly to the two second magnetic members 330 along a first direction.

[0056] For the pressure holding process of multiple workpieces of the same model, the position of the adjusting block 610 does not need to be adjusted. Therefore, the adjusting block 610 has a second elongated hole 611 extending along a first direction. The base 100 is provided with an adjusting screw hole. The adjusting screw passes through the second elongated hole 611 and is screwed into the adjusting screw hole to lock the adjusting block 610. There are two second elongated holes 611, which are arranged at intervals along a third direction. The number of adjusting screw holes and adjusting screws is the same as the number of second elongated holes 611, and they are arranged in a one-to-one correspondence.

[0057] The pressure-holding assembly 500 includes a pressure-holding base 510 and a pressure-holding head 520. A second guide rail 530 extending along a second direction is provided on the base 100. The pressure-holding base 510 is slidably disposed on the second guide rail 530 and moves between a pressing position and an lifting position. A third guide rail 540 extending along the second direction is provided on the pressure-holding base 510, and the pressure-holding head 520 is slidably disposed on the third guide rail 540. This arrangement ensures that the weight acting on the workpiece is equal to the weight of the pressure-holding head 520, thereby guaranteeing the reliability of the pressure-holding effect.

[0058] To achieve different pressure-holding effects, the pressure-holding assembly 500 also includes several pressure-holding counterweights 550, each with a different weight. The pressure-holding head 520 has a bearing position to support at least one pressure-holding counterweight 550. Some of the pressure-holding counterweights 550 weigh 0.05 kg, some weigh 0.1 kg, some weigh 0.3 kg, and some weigh 0.5 kg. Each pressure-holding counterweight 550 has a positioning hole, through which a pressure-holding pin 560 passes and is inserted into a positioning groove in the pressure-holding head 520.

[0059] During the descent of the pressure-holding seat 510, to avoid impact and damage to the workpiece, in some embodiments, the pressure-holding assembly 500 further includes a buffer 570. The buffer 570 is disposed on the base 100 and abuts against the pressure-holding seat 510 which has moved to the pressing position, thereby causing the pressure-holding seat 510 to slowly descend to the pressing position until the pressure-holding head 520 presses down on the workpiece. The buffer 570 can be a hydraulic damper.

[0060] The pressure-holding assembly 500 includes a limiting member 580, which is located on the base 100. A gap exists between the pressure-holding seat 510 in the depressed position and the limiting member 580. Even if the hydraulic damper is damaged, the limiting member 580 can limit the lower limit position of the pressure-holding seat 510, preventing excessive downward movement and damage to the workpiece. The limiting member 580 is a limiting screw. The base 100 has a limiting seat with a limiting screw hole. The limiting screw is screwed into and partially passes through the limiting screw hole. A locking nut engages with the limiting screw and abuts against the limiting seat, thereby locking the limiting screw and the limiting seat together.

[0061] In some embodiments, to achieve the lifting and lowering of the pressure-holding seat 510, the pressure-holding assembly 500 further includes an elbow clamp mechanism 590. The output end of the elbow clamp mechanism 590 is connected to the pressure-holding seat 510, and the input end of the elbow clamp mechanism 590 can adjust the movement of the pressure-holding seat 510 between a pressed position and an raised position. Exemplarily, the elbow clamp mechanism 590 includes an elbow clamp seat, an elbow clamp member, an elbow clamp connecting rod, and an elbow clamp handle. The elbow clamp seat is disposed on the base 100, the elbow clamp member is slidably disposed on the elbow clamp seat along a second direction, and its lower end is connected to the pressure-holding seat 510. One end of the elbow clamp connecting rod is hinged to the elbow clamp member, and the other end is hinged to the actuating part of the elbow clamp handle. The lower end of the elbow clamp handle is hinged to the elbow clamp seat, and the actuating part is located above the lower end of the elbow clamp handle. Of course, in other embodiments, the elbow clamp mechanism 590 can also be replaced by an electric push rod, which is disposed on the base 100 and its output end is connected to the pressure-holding seat 510.

[0062] The base 100 is equipped with an electrical control component that can record the pressure holding time. After the pressure holding time reaches the preset time, a prompt sound is emitted by the buzzer 120 to remind the staff to change the workpiece.

[0063] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A hold-down jig characterized by, include: Base (100); A first guide rail (200) is disposed on the base (100) and extends along a first direction; The bearing seat (300) is slidably mounted on the first guide rail (200) and can switch between the ballast position and the device position; Several fixture seats (400) are configured to hold workpieces of different types, and one of them is detachably connected to the support seat (300); A pressure holding assembly (500) is disposed on the base (100), and the output end of the pressure holding assembly (500) can move along a second direction perpendicular to the first direction to approach or move away from the workpiece; An adjustment component (600) is provided on the base (100), and the position of its output end is adjustable and restricts the bearing seat (300) to the ballast position when it abuts against the bearing seat (300).

2. The hold-down jig of claim 1, wherein The bearing seat (300) is provided with a locking screw hole, and the fixture seat (400) has a first elongated hole (411) extending along a third direction that is simultaneously perpendicular to the first direction and the second direction. The locking screw passes through the first elongated hole (411) and is screwed into the locking screw hole.

3. The holding fixture of claim 1, wherein The fixture base (400) includes a fixture body (410), wherein the fixture base (400) includes a pin (420) disposed on the fixture body (410), the workpiece has a insertion hole, and the pin (420) is inserted into the insertion hole; and / or, The fixture base (400) includes at least two limiting blocks (430) disposed on the fixture body (410), and the at least two limiting blocks (430) form a limiting area for holding the workpiece.

4. The hold-down jig of claim 1, wherein The support (300) includes a support body (310) and a first stop (340) disposed on the support body (310). The support body (310) is slidably disposed on the first guide rail (200). The base (100) has a second stop (110) that abuts against the first stop (340) to restrict the support (300) in the loading position.

5. The pressure-holding fixture according to any one of claims 1-4, characterized in that, The adjustment assembly (600) includes an adjustment block (610) and a micrometer (620). The adjustment block (610) is slidably disposed on the base (100) along a first direction. The micrometer (620) is disposed on the base (100), and the output end of the micrometer (620) abuts against the adjustment block (610) to limit the position of the adjustment block (610). The bearing seat (300) located at the ballast position abuts against the adjustment block (610). The adjustment block (610) is located between the micrometer (620) and the bearing seat (300).

6. The pressure-holding fixture according to claim 5, characterized in that, The adjustment assembly (600) further includes a first magnetic attractor (630), which is located at one end of the adjustment block (610) facing the support (300). The support (300) is made of magnetic material or a second magnetic attractor (330) that is attracted to the first magnetic attractor (630) is installed on the support (300).

7. The pressure-holding fixture according to claim 5, characterized in that, The adjusting block (610) has a second elongated hole (611) extending along a first direction, and the base (100) is provided with an adjusting screw hole. The adjusting screw passes through the second elongated hole (611) and is screwed into the adjusting screw hole.

8. The pressure-holding fixture according to any one of claims 1-4, characterized in that, The pressure holding assembly (500) includes a pressure holding base (510) and a pressure holding head (520). The base (100) is provided with a second guide rail (530) extending in a second direction. The pressure holding base (510) is slidably disposed on the second guide rail (530) and moves between a pressing position and an lifting position. The pressure holding base (510) is provided with a third guide rail (540) extending in a second direction. The pressure holding head (520) is slidably disposed on the third guide rail (540).

9. The pressure-holding fixture according to claim 8, characterized in that, The pressure holding assembly (500) also includes a plurality of pressure holding counterweights (550), the plurality of pressure holding counterweights (550) having different weights, and the pressure holding head (520) having a bearing position to bear at least one of the pressure holding counterweights (550).

10. The pressure-holding fixture according to claim 8, characterized in that, The pressure-holding assembly (500) further includes a buffer (570) disposed on the base (100) and abutting against the pressure-holding seat (510) moved to the pressing position; and / or, The pressure holding assembly (500) includes a limiting member (580) disposed on the base (100), and a gap is left between the pressure holding seat (510) in the pressed position and the limiting member (580).