CN218848203U - Clamping device suitable for integrated circuit test machine - Google Patents

Abstract

The utility model provides a clamping device suitable for an integrated circuit testing machine, which comprises a panel fixing frame, a cam driven bearing and a clamping device, wherein the panel fixing frame is used for fixedly mounting a panel to be tested; the clamping table comprises a base plate and a movable clamping piece, the movable clamping piece is arranged on one side of the base plate, and the movable clamping piece comprises two lower pressing plates and a screw rod adjusting assembly; the two lower pressing plates are oppositely arranged on the base plate to form a clamping space, one opposite sides of the two lower pressing plates are respectively provided with a guide groove, the guide grooves are obliquely arranged along the length direction of the lower pressing plates, and when the panel fixing frame is installed and clamped in the clamping space, the cam driven bearing of the panel fixing frame is positioned in the guide grooves and is in sliding fit with the guide grooves; when the screw adjusting assembly drives the two lower pressing plates to move along the length direction of the lower pressing plates relative to the base plate, the cam driven bearing slides in the guide groove to enable the panel to be tested to be switched between a locking state and a pulling-up state.

Description

Clamping device suitable for integrated circuit test machine

Technical Field

The application relates to the technical field of chip testing, in particular to a clamping device suitable for an integrated circuit testing machine.

Background

An Automatic Test Equipment (ATE) for integrated circuits is provided, which aligns, locks and pulls a female connector (connect) on a function board (function board) with a male connector on a Device Under Test (DUT).

The existing test equipment has a plurality of PCB function boards, and function signals are connected and transmitted to a male seat of a board of the equipment to be tested through a female seat of a connector on the board, because a large number of connecting pins on 20 connectors are about 2500, each pin generates about 0.3N force when being meshed, and the meshing force is large.

In order to prevent the connecting pins from being damaged, the relative stability of the equipment board to be tested and the function board is ensured in the connecting process, and the downward pressure on the equipment board to be tested is ensured to be vertically downward; meanwhile, the replacement of the subsequent equipment board to be tested is required. Therefore, need for a mechanism and can satisfy when the test simultaneously and press from both sides tight equipment board that awaits measuring and conveniently play and pull out in order to change the equipment board that awaits measuring.

Disclosure of Invention

The embodiment of the application provides a clamping device suitable for integrated circuit test machine, can solve and press from both sides tight equipment board that awaits measuring and conveniently play and pull out the problem in order to change the equipment board that awaits measuring when can not satisfying the test simultaneously among the prior art.

In a first aspect of the embodiments of the present application, a clamping device suitable for an integrated circuit testing machine is provided, where the clamping device includes:

the panel fixing frame is used for fixedly mounting a panel to be tested, and cam driven bearings are arranged on two sides of the panel fixing frame;

the clamping table comprises a base plate and a movable clamping piece, the movable clamping piece is arranged on one side of the base plate, and the movable clamping piece comprises two lower pressing plates and a screw rod adjusting assembly;

the two lower pressing plates are oppositely arranged on the base plate to form a clamping space, one opposite sides of the two lower pressing plates are respectively provided with a guide groove, the guide grooves are obliquely arranged along the length direction of the lower pressing plates, and when the panel fixing frame is installed and clamped in the clamping space, the cam driven bearing of the panel fixing frame is positioned in the guide grooves and is in sliding fit with the guide grooves;

when the screw adjusting assembly drives the two lower pressing plates to move along the length direction of the lower pressing plates relative to the base plate, the cam driven bearing slides in the guide groove to enable the panel to be tested to be switched between a locking state and a pulling state.

Furthermore, a positioning bulge is arranged on the substrate, a positioning hole is arranged on the panel fixing frame, and when the panel fixing frame is installed in the clamping space, the positioning bulge is located in the positioning hole so as to limit the panel fixing frame on the plane where the substrate is located.

Furthermore, a sliding block is fixedly connected to one side, facing the substrate, of the lower pressing plate, a guide rail is arranged on one side, facing the lower pressing plate, of the substrate, the guide rail extends along the length direction of the lower pressing plate, and the sliding block is in sliding fit with the guide rail.

Further, the slider passes through screw nut subassembly and lower clamp plate fixed connection, or slider and lower clamp plate integrated into one piece set up.

Furthermore, the guide rail is fixedly connected with the substrate through a screw nut assembly, or a strip-shaped groove is formed in the substrate to form the guide rail.

Furthermore, the movable clamping piece further comprises a connecting plate, two ends of the connecting plate are fixedly connected with the two lower pressing plates respectively, and the connecting plate is connected with the screw adjusting assembly.

Further, the screw adjusting assembly comprises a pulsator hand wheel and a screw rod, the connecting plate is rotatably connected with the pulsator hand wheel through the screw rod, and the connecting plate drives the two lower pressing plates to move in the rotating process of the pulsator hand wheel.

Furthermore, a bearing seat fixing block is fixedly arranged on the base plate, the bearing seat fixing block is arranged between the impeller hand wheel and the connecting plate, and the impeller hand wheel is rotatably connected with the bearing seat fixing block.

Furthermore, a first limiting groove and a second limiting groove are formed in the lower pressing plate; the panel fixing frame is provided with a limiting bulge;

when the panel to be tested is in a locking state, the limiting bulge is positioned in the first limiting groove; when the panel to be tested is in a pulling state, the limiting bulge is positioned in the second limiting groove.

Furthermore, a plurality of cam driven bearings are arranged on two sides of the panel fixing frame, a plurality of guide grooves are formed in each lower pressing plate, and the cam driven bearings correspond to the guide grooves one to one.

The clamping device that this application embodiment provided includes panel fixed frame and clamping table, and the clamping table includes base plate and activity holder, and panel fixed frame fixed mounting will be fixed and remain the panel fixed frame centre gripping of testing the panel in the activity holder behind the panel fixed mounting awaits measuring the panel. The cam driven bearings are arranged on two sides of the panel fixing frame, the movable clamping piece comprises two lower pressing plates and a screw rod adjusting assembly, guide grooves are formed in the opposite sides of the two lower pressing plates, the guide grooves are obliquely arranged along the length direction of the lower pressing plates, and when the panel fixing frame is installed and clamped in a space, the cam driven bearings of the panel fixing frame are located in the guide grooves and are in sliding fit with the guide grooves; when the screw adjusting assembly drives the two lower pressing plates to move along the length direction of the lower pressing plates relative to the base plate, the cam driven bearing slides in the guide groove to enable the panel to be tested to be switched between a locking state and a pulling state. Because the guide groove is the chute, also extend along the thickness direction of the lower pressing plate when extending along the length direction of the lower pressing plate, like this, when the screw adjusting component drives two lower pressing plates to move along the length direction of the lower pressing plate relative to the substrate, the panel fixing frame provided with the panel to be tested moves in the thickness direction relative to the clamping table, and the pressing and pulling-up of the panel to be tested can be realized.

Drawings

Fig. 1 is a schematic structural view of a panel fixing frame of a clamping device according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a clamping table of the clamping device according to an embodiment of the present disclosure;

fig. 3 is a second schematic structural diagram of a clamping table of the clamping device according to the embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of the clamping device according to the present disclosure, shown unlocked before movement of the lead screw;

FIG. 5 is a schematic cross-sectional view illustrating locking after a screw rod of the clamping device provided by the embodiment of the present application is moved;

FIG. 6 is a schematic view of a panel fixing frame of the clamping device according to the embodiment of the present disclosure before being assembled on a clamping table and locked;

fig. 7 is a schematic view of the panel fixing frame of the clamping device according to the embodiment of the present application after being assembled on the clamping table and locked;

fig. 8 is a schematic view of a guide groove on one side of a lower platen according to an embodiment of the present application.

Reference numerals are as follows:

1. a panel fixing frame; 11. a cam follower bearing; 12. positioning holes; 13. a limiting bulge; 2. a movable clamping member; 20. positioning the projection; 201. a bearing seat fixing block; 210. a lower pressing plate; 211. a connecting plate; 212. a slider fixing hole; 213. a slider; 214. a guide rail; 215. a guide groove; 216. a first limit groove; 217. a second limit groove; 220. a flange nut; 221. a screw rod; 222. a bearing seat; 223. a nut; 224. a pulsator hand wheel; 225. tightening the bolt; 3. a substrate; 31. a pin fixing hole; 32. the panel fixes the slot.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the inherent logic thereof, and should not constitute any limitation to the implementation process of the embodiments of the present application.

It should be understood that, in this application, "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be understood that in this application, "plurality" means two or more. "and/or" is merely an association describing an associated object, meaning that three relationships may exist, for example, and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "comprising a, B and C", "comprising a, B, C" means that all three of a, B, C are comprised, "comprising a, B or C" means comprising one of a, B, C, "comprising a, B and/or C" means comprising any 1 or any 2 or 3 of a, B, C.

It should be understood that in the present application, "B corresponding to a", "a corresponds to B", or "B corresponds to a" means that B is associated with a, from which B can be determined. Determining B from a does not mean determining B from a alone, but may be determined from a and/or other information. And the matching of A and B means that the similarity of A and B is greater than or equal to a preset threshold value. As used herein, "if" may be interpreted as "when" or "in response to a determination" or "in response to a detection," depending on the context.

The technical solution of the present application will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.

As shown in fig. 1-7, the clamping device for an integrated circuit tester provided in the embodiments of the present application is used for clamping a panel to be tested to be put into the integrated circuit tester for testing. The panel to be tested may be a chip, an integrated circuit, etc. The clamping device comprises a panel fixing frame 1 and a clamping table, wherein the panel fixing frame 1 is a square frame and is used for fixedly mounting a panel to be tested, a connector is convenient to insert and pull, and meanwhile, the panel to be tested can be prevented from being directly clamped by the clamping device to cause damage to the panel to be tested. Cam driven bearings 11 are arranged on two sides of the panel fixing frame 1, the cam driven bearings 11 can be bearings or cylindrical protrusions, and the cam driven bearings 11 are fixedly connected with the panel fixing frame 1.

The centre gripping platform includes base plate 3 and activity holder 2, and activity holder 2 sets up and the one side of base plate, and activity holder 2 includes two holding down plate 210 and screw rod adjusting part. Two holding down plates 210 set up relatively on base plate 3 in order to constitute the centre gripping space, and the relative one side of two holding down plates 210 all is provided with guide groove 215, and guide groove 215 inclines to set up along the length direction of holding down plate, and when panel fixed frame 1 installation and centre gripping space, panel fixed frame 1's cam follower bearing 11 is located guide groove 215 and with guide groove 215 sliding fit.

When the screw adjusting assembly drives the two lower pressing plates 210 to move along the length direction of the lower pressing plates relative to the base plate 3, the cam driven bearing 11 slides in the guide groove 215 to switch the panel to be tested between a locking state and a pulling state.

It can be understood that the base plate 3 is a mounting base of the movable clamping member 2, and the base plate 3 is provided with a panel fixing clamping groove 32, a pin positioning hole 31 and a positioning pin 200, and a bearing seat fixing block 201 for fixing a lead screw bearing seat 222.

Two lower pressing plates 210 are respectively installed at both side edges of the substrate 3 and slidably connected with the substrate. A clamping space is formed between the two lower pressing plates 210 for clamping the panel fixing frame 1. A guide groove 215 is formed on a side wall of the lower pressing plate 210 forming the clamping space, and the guide groove 215 is a chute. That is, the guide groove 215 extends in the thickness direction of the lower platen while extending in the length direction of the lower platen. When the lower pressing plate 210 moves relative to the substrate 3 under the driving of the screw adjusting assembly, the panel fixing frame 1 moves in the thickness direction relative to the clamping table due to the sliding fit of the upper inclined groove of the lower pressing plate 210 and the cam driven bearing on the panel fixing frame 1, so that the switching between the locking state and the pulling state can be realized.

Alternatively, the guide groove 215 extends to the surface of the lower platen 210 on the side away from the substrate 3. Therefore, when the lower pressing plate 210 is driven by the screw adjusting assembly to move relative to the substrate 3, the panel fixing frame 1 can be moved out of the clamping space, so that the panel fixing frame 1 can be taken out more conveniently.

A plurality of cam driven bearings 11 can be arranged on two sides of the panel fixing frame 1, and the cam driven bearings 11 are uniformly distributed on the side edge of the panel fixing frame 1 at intervals; correspondingly, each lower pressing plate 210 is provided with a plurality of guide grooves 215, the plurality of guide grooves 215 are uniformly distributed on the side wall of the lower pressing plate 210 at intervals, and the cam driven bearings 11 correspond to the guide grooves 215 one to one. Therefore, the panel fixing frame 1 can be uniformly stressed to move, the installation stability of the panel to be tested is guaranteed, and the damage to the panel to be tested in the processes of pressing and pulling is avoided.

Optionally, a positioning protrusion 20 is disposed on the substrate 3, a positioning hole 12 is disposed on the panel fixing frame 1, and when the panel fixing frame 1 is installed in the clamping space, the positioning protrusion 20 is located in the positioning hole 12 to limit the panel fixing frame 1 on the plane where the substrate 3 is located. It can be understood that the substrate 3 may be provided with positioning holes, and the panel fixing frame 1 may be provided with positioning protrusions. Through the cooperation of locating hole and location arch, can realize panel fixed frame 1's accurate location. The positioning holes can be multiple, and the positioning bulges correspond to the positioning holes one by one. Therefore, the installation stability of the panel to be tested can be guaranteed, the test error caused by the installation position is reduced, and the butt joint and the separation stability of the equipment board to be tested can be guaranteed in the process of pressing down or pulling up when the equipment board to be tested is in butt joint with a plurality of connectors or in the process of separation in a testing machine.

In the present application, the lower platen 210 and the base plate are slidably coupled. Specifically, a slide block 213 is fixedly connected to a side of the lower pressing plate 210 facing the substrate 3, a guide rail 214 is disposed on a side of the substrate 3 facing the lower pressing plate 210, the guide rail extends along a length direction of the lower pressing plate, and the slide block 213 is in sliding fit with the guide rail 214. Alternatively, a guide rail is arranged on one side of the lower pressing plate 210 facing the substrate 3, a slider is fixedly arranged on one side of the substrate 3 facing the lower pressing plate 210, and the lower pressing plate 210 and the substrate 3 slide relative to each other through the cooperation of the guide rail and the slider.

Optionally, the sliding block 213 and the lower pressing plate 210 are separate structures, the lower pressing plate 210 is provided with a sliding block fixing hole 212, and the sliding block 213 is fixedly connected with the lower pressing plate 210 through a screw and nut assembly and the sliding block fixing hole 212, so that the sliding block 213 and the lower pressing plate 210 can be conveniently mounted and dismounted. Alternatively, the slider 213 and the lower pressing plate 210 are formed as an integral structural member.

Alternatively, the guide rail 214 and the base plate 3 are of a separate structure. The guide rail 214 is fixedly connected with the substrate 3 through a screw nut assembly, so that the guide rail 214 and the substrate 3 can be conveniently mounted and dismounted. Alternatively, the side of the base plate 3 facing the lower platen 210 is recessed to form a strip-shaped groove that forms the guide rail 214.

In one embodiment, the movable clamping member 2 further includes a connection plate 211, two ends of the connection plate 211 are respectively fixedly connected to the two lower pressing plates 210, and the connection plate 211 is connected to the screw adjusting assembly. The connection plate 211 is disposed at one end of the lower pressing plate 210 near the screw adjusting assembly, and forms a clamping space together with the two lower pressing plates 210. The connecting plate 211 and the two lower pressing plates 210 constitute an integral movable member. The screw adjustment assembly acts on the connection plate 211 and moves the two lower press plates 210 together relative to the base plate 3.

The screw adjusting component can comprise a fastening bolt 225, a pulsator handwheel 224 and a screw rod 221, the pulsator handwheel 224 and the screw rod 221 are fixed by the fastening bolt 225, the connecting plate 211 is rotatably connected with the pulsator handwheel 224 by the screw rod 221, a bearing seat fixing block 201 is fixedly arranged on the base plate 3, the bearing seat fixing block 201 is arranged between the pulsator handwheel 224 and the connecting plate 211, the pulsator handwheel 224 is rotatably connected with the bearing seat fixing block 201, and a nut 223 is arranged between the pulsator handwheel 224 and the bearing seat fixing block 201 in a cushioning manner.

In the rotation process of the impeller handwheel 224, the connecting plate 211 drives the two lower pressing plates to move. The impeller handwheel 224 is fixed with the screw rod 221, the screw rod 221 is driven by rotating the impeller handwheel 224, the screw rod 221 and the flange nut 220 are meshed with each other through threads between the screw rod 221 and the flange nut 220, the screw rod 221 is fixed on the bearing seat 222, the purpose is to reduce the friction force generated by the screw rod and the connecting plate 211 when the screw rod rotates, simultaneously convert the rotating angle into linear motion, and simultaneously drive the lower pressing plate 210 to move along the length direction through the connecting plate 211. When the pulsator hand wheel 224 rotates clockwise (or counterclockwise), the lead screw drives the connecting plate 211 to move in a direction away from the pulsator hand wheel 224, the lower pressing plate 210 moves in the length direction relative to the substrate 3, the panel fixing frame 1 moves downwards in the thickness direction relative to the substrate 3, and the panel to be tested is gradually pressed; when the pulsator handwheel 224 rotates counterclockwise (or clockwise), the lead screw drives the connecting plate 211 to move in the direction close to the pulsator handwheel 224, the lower pressing plate 210 moves in the length direction relative to the substrate 3, and the panel fixing frame 1 moves upwards in the thickness direction relative to the substrate 3, so that the panel to be tested is pulled out.

In an alternative embodiment, the lower pressing plate 210 is provided with a first limiting groove 216 and a second limiting groove 217; the panel fixing frame 1 is provided with a limiting bulge 13. The limiting protrusion is used for limiting and matching with the first limiting groove 216 or the second limiting groove 217. Specifically, the first limiting groove 216 is a groove far away from the pulsator hand wheel 224, and the second limiting groove 217 is a groove close to the pulsator hand wheel 224. When the panel to be tested is in a locked state, the limiting protrusion 13 is positioned in the first limiting groove 216; when the panel to be tested is in a pulling state, the limiting protrusion 13 is positioned in the second limiting groove 217. In the process of rotating the pulsator hand wheel 224, the limiting protrusions 13 move from one limiting groove to the other limiting groove. So, can avoid leading to the device to damage because the rotatory too much circle of impeller hand wheel 224, on the scale of adding the directional bearing frame fixed block 201 of arrow point on impeller hand wheel 224 simultaneously, its purpose is when the different connector of needs change, the stroke of connector can be different, conveniently observe the condition that the connector pushed down during the use, when the public female seat of in-process connector takes place the circumstances such as skew of impressing, can in time release impeller hand wheel 224 reverse rotation equipment board that awaits measuring, prevent that the connector pin from taking place to warp or be the fracture, reduce the maintenance of the equipment board that awaits measuring. When different connectors are adapted, the downward pressure of the connector is different, so that the diameter of the impeller hand wheel 224 can be selected, and the torque in the force application direction can be increased by selecting the hand wheel with a larger diameter, so that labor is saved.

The clamping device suitable for the integrated circuit testing machine comprises a panel fixing frame 1 and a clamping table, wherein the clamping table comprises a substrate 3 and a movable clamping piece, and the panel fixing frame 1 is fixedly arranged behind a panel to be tested and is used for clamping the panel fixing frame 1 fixed with the panel to be tested in the movable clamping piece. The two sides of the panel fixing frame are provided with cam driven bearings 11, the movable clamping piece comprises two lower pressing plates 210 and a screw adjusting component, one opposite sides of the two lower pressing plates 210 are provided with guide grooves 215, the guide grooves 215 are obliquely arranged along the length direction of the lower pressing plates, and when the panel fixing frame 1 is installed and clamped in a space, the cam driven bearings 11 of the panel fixing frame 215 are positioned in the guide grooves 215 and are in sliding fit with the guide grooves 215; when the screw adjustment assembly drives the two lower press plates 210 to move along the length direction of the lower press plates 210 relative to the substrate 3, the cam driven bearing 11 slides in the guide groove 215 to switch the panel to be tested between a locking state and a pulling state. Because the guiding groove 215 is a chute, that is, it extends along the length direction of the lower press plate and also along the thickness direction of the lower press plate 210, when the screw adjusting assembly drives the two lower press plates to move along the length direction of the lower press plate relative to the substrate 3, the panel fixing frame 1 with the panel to be tested moves in the thickness direction relative to the clamping table, so as to realize the pressing and pulling of the panel to be tested.

The clamping device suitable for integrated circuit test machine that this application embodiment improves through setting up screw rod adjusting part, will rotate impeller hand wheel 224 and lead screw 221 fixed connection through holding bolt 225 and drive lead screw 221 and then drive the holding down plate and remove at its length direction, and then drive the panel that awaits measuring and have panel fixed frame 1 to remove at thickness direction for the grip slipper, can realize awaiting measuring compressing tightly of panel and play and pull out, structural design is simple, convenient operation. Meanwhile, the limit groove and the limit bulge 13 are matched to prevent the damage of the device caused by the excessive rotation of the impeller handwheel 224, and meanwhile, the requirement of clamping the equipment board to be tested during testing is met, and the equipment board to be tested is convenient to pull up and replace, so that the operation safety and the test reliability are improved.

It is noted that, unless expressly stated otherwise, all features disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features. Where used, further, preferably, still further and more preferably is a brief introduction to the description of the other embodiment based on the foregoing embodiment, the combination of the contents of the further, preferably, still further or more preferably back strap with the foregoing embodiment being a complete construction of the other embodiment. Several further, preferred, still further or more preferred arrangements of the belt after the same embodiment may be combined in any combination to form a further embodiment.

It will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A clamping apparatus adapted for use in an integrated circuit testing machine, the clamping apparatus comprising:

the panel fixing frame (1) is used for fixedly mounting a panel to be tested, and cam driven bearings (11) are arranged on two sides of the panel fixing frame (1);

the clamping table comprises a substrate (3) and a movable clamping piece (2), the movable clamping piece (2) is arranged on one side of the substrate, and the movable clamping piece (2) comprises two lower pressing plates (210) and a screw adjusting assembly;

the two lower pressing plates (210) are oppositely arranged on the base plate (3) to form a clamping space, one opposite sides of the two lower pressing plates (210) are respectively provided with a guide groove (215), the guide grooves (215) are obliquely arranged along the length direction of the lower pressing plates, and when the panel fixing frame (1) is installed in the clamping space, the cam driven bearing (11) of the panel fixing frame (1) is positioned in the guide grooves (215) and is in sliding fit with the guide grooves (215);

when the screw adjusting component drives the two lower pressing plates (210) to move along the length direction of the lower pressing plates relative to the base plate (3), the cam driven bearing (11) slides in the guide groove (215) to enable the panel to be tested to be switched between a locking state and a pulling state.

2. Clamping device according to claim 1, characterized in that a positioning protrusion (20) is provided on the substrate (3), a positioning hole (12) is provided on the panel fixing frame (1), and when the panel fixing frame (1) is mounted in the clamping space, the positioning protrusion (20) is located in the positioning hole (12) to position the panel fixing frame (1) on the plane of the substrate (3).

3. The clamping device according to claim 1, wherein a sliding block (213) is fixedly connected to a side of the lower pressure plate (210) facing the substrate (3), a guide rail (214) is arranged on a side of the substrate (3) facing the lower pressure plate (210), the guide rail extends along a length direction of the lower pressure plate, and the sliding block (213) is in sliding fit with the guide rail (214).

4. The clamping device according to claim 3, characterized in that the sliding block (213) is fixedly connected with the lower pressure plate (210) through a screw and nut assembly, or the sliding block (213) and the lower pressure plate (210) are integrally formed.

5. Clamping device according to claim 3, characterized in that the guide rail (214) is fixedly connected with the base plate (3) by means of a screw and nut assembly, or the base plate (3) is provided with a strip-shaped groove to form the guide rail (214).

6. The clamping device according to claim 1, wherein the movable clamping member (2) further comprises a connecting plate (211), two ends of the connecting plate (211) are respectively fixedly connected with the two lower pressing plates (210), and the connecting plate (211) is connected with the screw adjusting assembly.

7. The clamping device as claimed in claim 6, wherein the screw adjustment assembly comprises a pulsator hand wheel (224) and a screw rod (221), the connecting plate (211) is rotatably connected with the pulsator hand wheel (224) through the screw rod (221), and the connecting plate (211) drives the two lower pressing plates to move during rotation of the pulsator hand wheel (224).

8. The clamping device according to claim 7, wherein a bearing seat fixing block (201) is fixedly arranged on the base plate (3), the bearing seat fixing block (201) is arranged between the impeller handwheel (224) and the connecting plate (211), and the impeller handwheel (224) is rotatably connected with the bearing seat fixing block (201).

9. The clamping device according to claim 1, wherein the lower pressure plate (210) is provided with a first limiting groove (216) and a second limiting groove (217); a limiting bulge (13) is arranged on the panel fixing frame (1);

when the panel to be tested is in the locking state, the limiting bulge (13) is positioned in the first limiting groove (216); when the panel to be tested is in the pulling state, the limiting bulge (13) is positioned in the second limiting groove (217).

10. The clamping device according to claim 1, wherein a plurality of the cam driven bearings (11) are arranged on two sides of the panel fixing frame (1), a plurality of the guide grooves (215) are arranged on each lower pressing plate (210), and the plurality of the cam driven bearings (11) and the plurality of the guide grooves (215) correspond to each other one by one.

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