CN214538325U - Button stress test equipment - Google Patents

Abstract

The utility model relates to a button stress test equipment, including pressure measurement device and positioning device, the pressure measurement device is used for monitoring the pressure that the await measuring button received, and the pressure measurement device includes actuating system, pressure sensor and contact, and pressure sensor is connected with actuating system, and straight reciprocating motion is descended at actuating system drive, and the contact is installed on pressure sensor for pressing the await measuring button, and positioning device corresponds the setting with the pressure measurement device, is used for fixing the await measuring button and adjusts the position of awaiting measuring the button; the position adjusting device is arranged to enable the position adjustment in the key testing process to be more convenient, the equipment to be more convenient to use, the use efficiency is improved, the arrangement of a group of driving systems can be omitted due to the arrangement of the position adjusting device, the structure of the equipment is simplified, and the manufacturing and use cost is reduced.

Description

Button stress test equipment

Technical Field

The utility model belongs to the technical field of stress test and specifically relates to a button stress test equipment.

Background

With the progress of society and the development of science and technology, more and more electronic products and electrical equipment are applied to the daily life of people, and in the electronic products and the electrical equipment, a plurality of key devices can be applied, the key products need to be subjected to related tests before being assembled and packaged, such as the measurement of the stroke, load, hand feeling, resistance and the like of the key, the stress test of the key in the process of being pressed at different points is an important item, and the traditional key stress test equipment can test a plurality of different points of the key by at least two groups of driving systems, has a complex equipment structure, high production, manufacturing and use costs, is inconvenient to use and has low test efficiency.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a can test button at a plurality of positions and press in-process stress to simple structure, convenient to use's button stress test equipment is with the production manufacturing cost who reduces button stress test equipment, and improve its efficiency of software testing.

The embodiment of the utility model provides a button stress test equipment, equipment includes: the pressure measuring device is used for monitoring the pressure applied to the key to be tested, and comprises: the pressure sensor is connected with the driving system and driven by the driving system to move linearly and reciprocally, and the contact is mounted on the pressure sensor and used for pressing a key to be tested; and the positioning device is arranged corresponding to the pressure measuring device and is used for fixing the keys to be tested and adjusting the positions of the keys to be tested.

Further, the positioning device comprises: the base is arranged at the front end of the pressure sensor in the moving direction and is provided with a fixed plane; the guide rail is laid on the fixed plane; the position adjusting sliding block is arranged on the guide rail in a sliding mode and used for fixing the key to be tested and adjusting the position of the key to be tested; the left positioning piece and the right positioning piece are respectively arranged at the two ends of the guide rail and are fixed on the base; and the centering positioning piece is arranged in the middle of the guide rail and adjacent to the guide rail and is fixedly arranged on the base.

Further, the apparatus further comprises: and the fixture is fixed on the positioning slide block and is used for fixing the to-be-tested key.

Further, the jig includes: the bottom plate is fixed on the positioning slide block; the limiting piece is fixed on the bottom plate and is provided with a fixing groove matched with the side face of the key to be tested; and the clamping device is arranged corresponding to the fixing groove and is used for clamping the key to be tested in the fixing groove.

Further, the positioning device further comprises: the positioning platform is fixedly installed on the positioning sliding block, the positioning platform is positioned on the positioning sliding block when being matched with the left positioning piece, the right positioning piece or the middle positioning piece, and the bottom plate is detachably fixed on the positioning platform.

Furthermore, a clamp stop block is arranged on the positioning platform and used for limiting the bottom plate.

Furthermore, the clamp stop dog and the bottom plate are provided with magnetic parts on the surfaces which are mutually contacted, and the clamp stop dog performs magnetic attraction fixing on the bottom plate through the magnetic parts.

Furthermore, a groove is formed in the surface of one side, close to the centering positioning piece, of the positioning platform, an elastic piece is installed on the centering positioning piece, and the elastic piece is matched with the groove and used for positioning the positioning platform.

Further, the pressure measuring device further includes: the control platform is arranged at the bottom of the driving system and is in communication connection with the driving system and the pressure sensor.

Furthermore, the top of the console is provided with an installation surface, a plurality of positioning holes are uniformly distributed on the installation surface, holes are formed in the base, and the base is fixed on the installation surface through the positioning holes and the holes.

Further, all seted up the mounting hole on left side setting element, right setting element and the setting element placed in the middle, the mounting hole is the bar hole that extending direction and guide rail extending direction are the same, left side setting element, right setting element and the setting element placed in the middle pass through the mounting hole is fixed on the base.

Further, the drive system includes: the motor drives the lead screw assembly to move through the coupler.

Further, the pressure measuring device further includes: the protection casing, the protection casing sets up the actuating system periphery, just the gap has been seted up to pressure sensor one side, the gap is followed pressure sensor direction of motion extends, pressure sensor by the gap stretches out.

Further, the clamping device includes: the fixing block is fixedly arranged on the bottom plate, and a threaded hole is formed in the fixing block; the sliding rail is arranged on the bottom plate, and the extending direction of the sliding rail is the same as the axial direction of the threaded hole; the sliding block is connected with the sliding rail in a sliding mode and used for clamping the key to be tested in the fixing groove, and a clamping structure is arranged on the end face, close to one side of the fixing block, of the sliding block; and the screw rod, with the screw thread hole forms screw-thread fit, just the ladder groove has on the screw rod, joint structure joint is in will in the ladder groove the screw rod with the slider rotates to be connected.

Further, the clamping device further comprises: the pressure head, the pressure head fixed mounting be in be close to on the slider fixed slot one side with the corresponding position of fixed slot, and adopt the super power to glue the material for will await measuring the button press from both sides tightly in the fixed slot.

The embodiment of the utility model provides a through setting up the positioning device, it is more convenient to make the position adjustment in the button testing process, makes equipment usage more convenient, has improved the availability factor to owing to set up the positioning device, make equipment can reduce a set of actuating system's setting, simplified the structure of equipment, reduced manufacturing and use cost.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural view of the pressure measuring device of the present invention;

FIG. 3 is a schematic view of the overall structure of the positioning device and the clamp of the present invention;

fig. 4 is one of the specific structural schematic diagrams of the positioning device of the present invention;

FIG. 5 is a second schematic view of the positioning device of the present invention;

fig. 6 is a schematic view of the specific structure of the clamp of the present invention.

Legend: 1. a pressure measuring device; 11. a drive system; 111. a motor; 112. a coupling; 113. a lead screw assembly; 1131. a mounting frame; 1132. a lead screw; 14. a pressure sensor; 15. a contact; 16. a console; 161. a mounting surface; 162. positioning holes; 17. a protective cover; 171. a gap; 2. a position adjusting device; a base; 211. fixing a plane; 212. an aperture; 22. a guide rail; 23. a position adjusting slide block; 24. a left positioning member; 25. a right positioning member; 26. a centering positioning member; 261. an elastic member; 27. positioning the platform; 271. a clamp stop block; 2711. a magnetic member; 2712. a first stopper; 2713. a second stopper; 272. a groove; mounting holes; 3. a clamp; 31. a base plate; 32. a limiting member; 321. fixing grooves; 33. a clamping device; 331, fixing blocks; 3311. a threaded hole; 332. a slide rail; 333. a slider; 3331. a clamping structure; 334. a screw; 3341. a stepped groove; 335. and (4) pressing head.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in fig. 1, the utility model discloses a button stress test equipment of embodiment, including pressure measurement device 1 and positioning device 2, pressure measurement device 1 is used for the pressure that the examination button that awaits measuring received, and pressure measurement device 1 includes: the pressure sensor 14 is an MPM281 type pressure sensor and is connected with the driving system through a connecting arm, the contact 15 is installed on the pressure sensor 14 and used for pressing a key to be tested and transmitting the pressure to the pressure sensor 14, and the positioning device 2 is arranged corresponding to the pressure measuring device 1 and used for fixing the key to be tested and adjusting the position of the key to be tested; when the device works, a key to be tested is fixedly arranged on the positioning device 2, then the position of the positioning device 2 is adjusted, a pressing point to be tested on the key to be tested is positioned at a corresponding position of the contact 15, the position of the positioning device 2 is fixed, then the pressure measuring device 1 is started, the driving system 11 drives the pressure sensor 14 to move towards the direction close to the key to be tested until the contact 15 contacts the pressing point to be tested, at the moment, the pressure sensor 14 starts to generate pressure data, then the driving system 11 continues to drive the pressure sensor 14 to move until the contact 15 presses the key to be tested to the maximum stroke, then the driving system 11 acts reversely to drive the pressure sensor 14 and the contact 15 to release the key, in the process, the pressure sensor 14 continuously generates pressure data, after the key is released, the pressure sensor 14 finishes working, and the pressure measuring device 1 returns to the original position, then readjusting the position of the positioning device 2 to enable the next to-be-tested pressing point on the to-be-tested key to be located at the position corresponding to the contact 15, and then repeating the above actions by the pressure measuring device to test the pressing stress of the next pressing point; adjustment when having made things convenient for the button difference to press the position and carry out pressure test through setting up positioning device 2, easy operation is convenient, has improved the availability factor to through using positioning device 2, make equipment only need set up the actuating system 11 of a set of folk prescription, simplified the structure of equipment, practiced thrift the manufacturing and the use cost of equipment.

As shown in fig. 2, in one particular embodiment, the drive system 11 includes: the motor 111 drives the lead screw assembly 113 to move through the coupler 112, the lead screw assembly 113 comprises an installation frame 1131 and a lead screw 1132, the installation frame 1131 and the lead screw 1132 are vertically arranged, the lead screw 1132 is rotatably installed on the installation frame 1131, and the pressure sensor 14 is fixedly installed on a nut of the lead screw 1132; when the device works, firstly, the motor 111 is started, the motor 111 drives the lead screw 1132 to move on the mounting frame 1131 through the coupler 112, and at this time, the nut of the lead screw 1132 drives the pressure sensor 14 to perform linear motion, so as to complete the test of the key stress; specifically, lead screw 132 is ball, and motor 11 is servo motor, and the motion accuracy is high, and the control performance is good, can satisfy the test needs, makes the test result more accurate.

As shown in fig. 1, in some alternative embodiments, the pressure measuring device 1 further includes a protective cover 17, the protective cover 17 is disposed on the periphery of the driving system 11, and a slot 171 extending along the moving direction of the pressure sensor 14 is opened on one side of the pressure sensor 14, and the pressure sensor 14 extends from the slot 171; through setting up protection casing 17, can protect staff's safety, avoid meeting accident in the use, protection casing 17 still can play dirt-proof effect simultaneously, can prolong actuating system 11's life.

In some alternative embodiments, the pressure measuring device 1 further comprises: the console 16 is arranged at the bottom of the driving system 11, and the console 16 is in communication connection with the driving system 11 and the pressure sensor 14; the start and stop of the driving system 11 can be controlled by the console 16, and the pressure data measured by the pressure sensor 14 will be transmitted to and recorded in the console 16, and the console 16 is disposed at the bottom of the driving system 11, so that the operation and recording of the operator are more convenient.

As shown in fig. 1 and 4, in a specific embodiment, the top of the console 16 has an installation surface 161, and a plurality of positioning holes 162 are uniformly distributed on the installation surface 161, a hole 212 is formed in the base 21, the base 21 is fixed on the installation surface 161 through the positioning hole 162 and the hole 212, and a plurality of positioning holes 162 are uniformly distributed on the installation surface 161, so that the installation position of the base 21 can be conveniently adjusted, the apparatus can be suitable for various keys to be tested and positioning devices 2 with different shapes or sizes, and the universality of the device is increased; in this embodiment, the hole 212 may be a strip-shaped hole, and the extending direction is perpendicular to the extending direction of the guide rail 22, so that the position of the positioning device 2 can be finely adjusted in the direction perpendicular to the extending direction of the guide rail 22.

As shown in fig. 1, fig. 3, fig. 4 and fig. 5, the positioning device 2 includes a base 21, a guide rail 22, a positioning slider 23, a left positioning element 24, a right positioning element 25 and a centering positioning element 26, the base 21 is disposed at the front end of the movement direction of the pressure sensor 14 and has a fixing plane 211, the guide rail 22 is laid on the fixing plane 211, the positioning slider 23 is slidably disposed on the guide rail 22 and is used for fixing the key to be tested and adjusting the position of the key to be tested, the left positioning element 24 and the right positioning element 25 are respectively mounted at two ends of the guide rail 22 and are fixed on the base 21, the centering positioning element 26 is disposed adjacent to the guide rail 22 at the middle position of the guide rail 22 and is fixedly mounted on the base 21; when the testing device is used, a key to be tested is fixed on the positioning slide block 23, the pressed position of the key to be tested is changed by adjusting the position of the positioning slide block 23 on the guide rail 22, when the positioning slide block 23 moves to the left end of the guide rail 22, the positioning slide block 23 is in contact with the left positioning piece 24 to realize positioning, at the moment, the pressure sensor 14 measures the right side stress of the key to be tested, when the positioning slide block 23 moves to the right end of the guide rail 22, the positioning slide block 23 is in contact with the right positioning piece 25 to realize positioning, at the moment, the pressure sensor 14 measures the left side stress of the key to be tested, when the positioning slide block 23 moves to the middle of the guide rail 22, the positioning slide block 23 is matched with the centering positioning piece 26 to realize positioning in a magnetic attraction, clamping and the like mode, and at the moment, the pressure sensor 14 measures the middle stress of the key to be tested; the positioning is realized through the arrangement of the positioning sliding block 23 and the guide rail 22, and the positioning sliding block 23 is quickly positioned by arranging the left positioning piece 24, the right positioning piece 25 and the middle positioning piece 26, so that the equipment is simpler and more convenient to use, and the use efficiency of the equipment is improved.

In some optional embodiments, the left positioning element 24, the right positioning element 25 and the central positioning element 26 are all provided with mounting holes 28, the mounting holes 28 are strip-shaped holes having the same extending direction as the extending direction of the guide rail 22, and the left positioning element 24, the right positioning element 25 and the central positioning element 26 are fixed on the base 21 through the mounting holes 28; through the arrangement of the strip-shaped mounting hole 28, when the size or the shape of the key to be tested changes, the positions of the left positioning piece 24, the right positioning piece 25 and the middle positioning piece 26 can be finely adjusted, so that the positioning position of the key can be finely adjusted, and the pressing point to be tested can be accurately pressed.

As shown in fig. 1 and fig. 3, the key stress testing device further includes a fixture 3, the fixture 3 is fixed on the positioning slider 23 and is used for fixing a key to be tested; the to-be-tested key can be quickly fixed on the positioning slide block 23 by using the clamp 3, so that the equipment is more convenient and quicker to use.

As shown in fig. 6, the fixture 3 includes a bottom plate 31, a limiting member 32 and a clamping device 33, the bottom plate 31 is fixed on the positioning slider 23, the limiting member 32 is fixed on the bottom plate 31 and has a fixing groove 321 matched with a side surface of the key to be tested, the clamping device 33 is arranged corresponding to the fixing groove 321 and is used for clamping the key to be tested in the fixing groove 321; the key to be tested is placed in the fixing groove 321, the key is fixed in the fixing groove 321 through the clamping device 33, and finally the bottom plate 31 of the clamp 3 is installed on the positioning sliding block 23, so that the key can be fixedly installed on the positioning sliding block 23, the structure is simple, and the disassembly is convenient.

Specifically, the clamping device 33 includes: the fixing block 331 is fixedly mounted on the bottom plate 31, the fixing block 331 is provided with a threaded hole 3311, the sliding rail 332 is arranged on the bottom plate 31, the extending direction of the sliding rail is the same as the axial direction of the threaded hole 3311, the sliding block 333 is slidably connected with the sliding rail 332 and used for clamping a key to be tested in the fixing groove 321, the sliding block 333 is provided with a clamping structure 3331 on the end surface close to one side of the fixing block 331, the screw rod 334 is in threaded fit with the threaded hole 3311, the screw rod 334 is provided with a stepped groove 3341, and the clamping structure 3331 is clamped in the stepped groove 3341 to rotatably connect the screw rod 334 and the sliding block 333; when needs step up the button, rotate screw rod 334, screw rod 334 takes place the motion for fixed orifices 331 through the cooperation with screw hole 3311, pass through the cooperation of ladder groove 3341 and joint structure 3331 this moment, slider 333 follows the screw rod 334 motion and slides along slide rail 332, until slider 333 with await measuring the button contact with it steps up, after the test is accomplished, the reverse rotation screw rod, can loosen the button, easy operation is convenient, more excellent, fixed mounting has the handle on the screw rod, make things convenient for the staff to operate more.

As a specific implementation manner, the clamping device 33 further includes a pressing head 335, the pressing head 335 is fixedly mounted at a position on the sliding block 333 corresponding to the fixing groove 321 near one side of the fixing groove 321, and is made of a high-strength rubber material, and is used for clamping the key to be tested in the fixing groove 321.

As shown in fig. 3 to 5, in some optional embodiments, the positioning device 2 further includes a positioning platform 27, the positioning platform 27 is fixedly installed on the positioning slider 23, the positioning platform 27 positions the positioning slider 23 when being matched with the left positioning member 24, the right positioning member 25, or the centering member 26, the bottom plate 31 is detachably fixed on the positioning platform 27, the positioning platform 27 is installed on the positioning slider 23, and positioning is achieved through matching between the positioning platform 27 and the left positioning member 24, the right positioning member 25, or the centering member 26, so that abrasion of the positioning slider 23 can be reduced, and positioning accuracy can be improved.

In a specific embodiment, a groove 272 is formed on a side surface of the positioning platform 27 close to the centering positioning member 26, an elastic member 261 is mounted on the centering positioning member 26, and the elastic member 261 is matched with the groove 272 for positioning the positioning platform 27; elastic member 261 is ball spring plunger in this embodiment, when locating platform 27 moves the assigned position, the bulb of elastic member 261 pops out and gets into in the recess 272, fix a position locating platform 27, when locating platform 27 needs the change position, move locating platform 27 through external force, ball spring plunger's bulb can retract under the effect of external force, make locating platform 27 can move, realize the location to locating platform 27 through the cooperation of elastic member 261 and recess 272, moreover, the steam generator is simple in structure, and convenient for operation.

In a specific embodiment, a clamp stop 271 is disposed on the positioning platform 27, the clamp stop 271 is used for limiting the position of the bottom plate 31, when the bottom plate 31 of the clamp 3 is mounted on the positioning platform 27, the bottom plate 31 can be abutted against the clamp stop 271 to determine the position of the bottom plate 31 on the positioning platform 27, and then the bottom plate 31 is fixed with the positioning platform 27, so that the quick installation is realized, the working efficiency is improved, in this embodiment, the jig stopper 271 includes a first stopper 2712 and a second stopper 2713, the first stopper 2712 and the second stopper 2713 are disposed perpendicular to each other, and the bottom plate 31 is two right-angled sides at the matching position with the clamp stop block 271, the bottom plate 31 is placed on the positioning platform 27, the position of the clamp 3 can be determined by moving the position of the clamp to enable two right-angle sides of the clamp to be simultaneously abutted against the first stopper 2712 and the second stopper 2712, and the operation is fast and convenient.

As shown in fig. 4 to 6, in a specific embodiment, the clamp stopper 271 and the bottom plate 31 are provided with magnetic members 2711 on surfaces contacting each other, and the clamp stopper 271 magnetically fixes the bottom plate 31 by the magnetic members 2711; when the bottom plate 31 is placed at the corresponding position on the positioning platform 27, the clamp stopper 271 and the magnetic member 2711 on the bottom plate 31 attract each other, so that the bottom plate 31 is automatically fixed at the position where the clamp stopper 271 is positioned, the operation is further simplified, and the use is more convenient and faster.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (15)

1. A key stress testing apparatus, the apparatus comprising:

pressure measuring device (1) for monitoring the pressure to which a key to be tested is subjected, said pressure measuring device (1) comprising: the device comprises a driving system (11), a pressure sensor (14) and a contact (15), wherein the pressure sensor (14) is connected with the driving system (11) and driven by the driving system (11) to move downwards in a linear reciprocating manner, and the contact (15) is installed on the pressure sensor (14) and used for pressing a key to be tested;

the positioning device (2) is arranged corresponding to the pressure measuring device (1) and used for fixing the to-be-tested key and adjusting the position of the to-be-tested key.

2. The apparatus according to claim 1, characterized in that said positioning means (2) comprise:

a base (21) which is arranged at the front end of the pressure sensor (14) in the movement direction and is provided with a fixed plane (211);

the guide rail (22) is laid on the fixed plane (211);

the positioning sliding block (23) is arranged on the guide rail (22) in a sliding mode and used for fixing the key to be tested and adjusting the position of the key to be tested;

the left positioning piece (24) and the right positioning piece (25) are respectively arranged at two ends of the guide rail (22) and fixed on the base (21); and

the centering positioning piece (26) is arranged at the middle position of the guide rail (22) and adjacent to the guide rail (22), and is fixedly installed on the base (21).

3. The apparatus of claim 2, further comprising:

the fixture (3) is fixed on the positioning slide block (23) and used for fixing the key to be tested.

4. The apparatus according to claim 3, characterized in that the clamp (3) comprises:

the bottom plate (31), the said bottom plate (31) is fixed to the said positioning slide block (23);

the limiting piece (32), the limiting piece (32) is fixed on the bottom plate (31), and is provided with a fixing groove (321) matched with the side surface of the key to be tested; and

a clamping device (33), wherein the clamping device (33) is arranged corresponding to the fixing groove (321) and is used for clamping the key to be tested in the fixing groove (321).

5. The apparatus according to claim 4, characterized in that said positioning means (2) further comprise:

positioning platform (27), positioning platform (27) fixed mounting be in positioning slider (23) is last, positioning platform (27) with left side setting element (24) or right setting element (25) or setting element (26) are right when coordinating positioning slider (23) are fixed a position, bottom plate (31) detachable is fixed in on positioning platform (27).

6. The apparatus according to claim 5, characterized in that a clamp stop (271) is arranged on the positioning platform (27), the clamp stop (271) being used for limiting the base plate (31).

7. The apparatus according to claim 6, characterized in that the clamp stop (271) and the base plate (31) are provided with magnetic means (2711) on the surfaces that are in contact with each other, the clamp stop (271) magnetically fixing the base plate (31) by the magnetic means (2711).

8. The device according to claim 5, characterized in that a groove (272) is formed in a surface of the positioning platform (27) close to one side of the centering member (26), an elastic member (261) is mounted on the centering member (26), and the elastic member (261) is matched with the groove (272) to position the positioning platform (27).

9. The apparatus according to claim 2, characterized in that the load cell (1) further comprises:

a console (16), wherein the console (16) is arranged at the bottom of the driving system (11) and is connected with the driving system (11) and the pressure sensor (14) in a communication way.

10. The apparatus of claim 9, wherein the console (16) has a mounting surface (161) at the top, and a plurality of positioning holes (162) are uniformly distributed on the mounting surface (161), the base (21) is provided with holes (212), and the base (21) is fixed on the mounting surface (161) through the positioning holes (162) and the holes (212).

11. The device according to claim 2, characterized in that the left positioning member (24), the right positioning member (25) and the middle positioning member (26) are respectively provided with a mounting hole (28), the mounting holes (28) are strip-shaped holes with the extending direction being the same as that of the guide rail (22), and the left positioning member (24), the right positioning member (25) and the middle positioning member (26) are fixed on the base (21) through the mounting holes (28).

12. The apparatus according to claim 1, characterized in that said drive system (11) comprises: the motor (111), shaft coupling (112) and lead screw subassembly (113), motor (111) pass through shaft coupling (112) drive lead screw subassembly (113) motion.

13. The apparatus according to claim 1, characterized in that the load cell (1) further comprises:

the protective cover (17), protective cover (17) set up actuating system (11) periphery, and pressure sensor (14) one side has been seted up gap (171), gap (171) are followed pressure sensor (14) direction of motion extends, pressure sensor (14) by gap (171) stretch out.

14. The apparatus according to claim 4, characterized in that said clamping means (33) comprise:

the fixing block (331) is fixedly arranged on the bottom plate (31), and a threaded hole (3311) is formed in the fixing block (331);

the sliding rail (332), the sliding rail (332) is set on the bottom plate (31), and the extending direction is the same as the axial direction of the threaded hole (3311);

the sliding block (333) is connected with the sliding rail (332) in a sliding mode and used for clamping the key to be tested in the fixing groove (321), and a clamping structure (3331) is arranged on the end face, close to one side of the fixing block (331), of the sliding block (333); and

screw rod (334), with screw hole (3311) forms screw-thread fit, just ladder groove (3341) have on screw rod (334), joint structure (3331) joint is in will in ladder groove (3341) screw rod (334) with slider (333) rotate and are connected.

15. The apparatus according to claim 14, wherein the clamping device (33) further comprises:

the pressing head (335) is fixedly arranged on the sliding block (333) at a position close to one side of the fixing groove (321) and corresponding to the fixing groove (321), and is used for clamping the key to be tested in the fixing groove (321).

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