CN212540621U - Protection plate test fixture - Google Patents

Abstract

The utility model belongs to the technical field of the circuit board, more specifically say, relate to a protection shield test fixture. The backboard comprises a bottom board and a backboard body, wherein a mounting groove is formed in the bottom board, a positioning long hole is formed in the bottom board, the backboard body can be detachably connected to the bottom board and can move along the positioning long hole to adjust the position of the backboard relative mounting groove, a driving assembly is installed on the backboard body, the driving end of the driving assembly is suspended above the mounting groove and is detachably connected with a testing board provided with a testing needle, and the driving assembly can drive the testing board to move up and down relative to the bottom board. When testing the protection shield of different models, will await measuring the protection shield installation to the mounting groove, will correspond to survey the test panel and change the drive end that is connected to drive assembly, follow location slot hole again and survey the concrete position of testing panel and finely tune and make the test needle just can the test point. So, to the test of different model protection shields, only need to change the test panel of corresponding combination can, test fixture commonality is strong, is applicable to the test of different model protection shields.

Description

Protection plate test fixture

Technical Field

The utility model belongs to the technical field of the circuit board, more specifically say, relate to a protection shield test fixture.

Background

The protection board is a type of circuit board which is commonly used for protecting the battery from damaging the battery so as to prolong the service life of the battery, and when the protection board is used, the protection board is connected into a battery circuit, so that the battery can be protected in the most stable and effective mode, and more serious circuit accidents caused by the failure of the battery can be prevented.

Generally, the protection board needs to be tested for reliability before being shipped out of a factory, so as to ensure that the protection board can correspondingly protect the battery. The existing test jig for testing the protection plate is mostly an integrated jig, one jig can only fixedly test one type of protection plate, the test model of the jig is single, and the test jig is not strong in universality; in addition, aiming at the protection plates of different models, a special test fixture needs to be manufactured, and the cost for manufacturing various test fixtures is high.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a protection shield test fixture to the protection shield test fixture commonality that solves among the prior art is not strong, the higher technical problem of cost of manufacture.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a protection shield test fixture, includes bottom plate and backplate, be provided with the mounting groove that supplies the protection shield installation on the bottom plate, the location slot hole has been seted up on the bottom plate, the backplate can dismantle connect in on the bottom plate and can follow location slot hole removes with the adjustment the backplate is relative the position of mounting groove, install drive assembly on the backplate, drive assembly's drive end hangs to be located the top of mounting groove and detachable connection have the survey test panel of installing the test needle, drive assembly can drive survey the test panel and relative the bottom plate reciprocates, so that test needle contact or keep away from the test point on the protection shield.

Furthermore, the length direction of the positioning long hole is parallel to the length direction of the mounting groove, and the position of the back plate relative to the mounting groove is adjusted along the length direction of the positioning long hole.

Furthermore, the back plate is connected with the bottom plate through a screw inserted into the positioning long hole, and the screw can move along the length direction of the positioning long hole so as to change the installation position of the back plate.

Furthermore, the bottom plate is provided with at least two positioning long holes at intervals, and two opposite end parts of the back plate are respectively connected with the bottom plate through two screws inserted in the two positioning long holes.

Furthermore, the protection board test fixture further comprises a mounting plate which is adapted to be embedded in the mounting groove, and the mounting plate is right opposite to the accommodating groove which is used for accommodating the protection board and is concavely arranged on the top surface of the test board.

Furthermore, the protection board test fixture further comprises a connecting plate, the connecting plate is connected with the driving end of the driving assembly, a clamping groove matched with the test board in shape is formed in the connecting plate, and the test board is clamped in the clamping groove.

Furthermore, the clamping groove is located right above the mounting groove, the length direction of the clamping groove is parallel to the length direction of the mounting groove, and the width dimension of the clamping groove is larger than that of the test board.

Furthermore, the back plate is vertically arranged on the bottom plate, two linear guide rails perpendicular to the bottom plate are convexly arranged on the back plate at intervals, two sliding blocks are connected to positions of the connecting plate corresponding to the two linear guide rails, the two linear guide rails are correspondingly clamped in sliding grooves of the two sliding blocks, and the driving assembly drives the connecting plate to move up and down along the linear guide rails relative to the bottom plate.

Further, drive assembly includes support frame, drive push rod and drive handle, the support frame has relative first end and the second end that sets up, drive push rod activity set up in the first end of support frame and with the bottom plate is mutually perpendicular, drive handle rotate connect in the second end of support frame, drive push rod's one end with the connecting plate links to each other and forms drive assembly's drive end, drive handle with drive push rod interlock, thereby drive when drive handle is rotatory can drive push rod in be linear motion on the support frame and drive the connecting plate is kept away from or is close to the bottom plate.

Furthermore, a supporting arm is arranged at the second end of the supporting frame, one end, close to the driving push rod, of the driving handle is hinged to the supporting arm, and one end, close to the driving push rod, of the driving handle is bent upwards and extends to form a handle connecting part;

the driving assembly further comprises a driving connecting rod, two opposite ends of the driving connecting rod are respectively hinged to the handle connecting portion and the end portion, far away from the connecting plate, of the driving push rod, the first end of the supporting frame is perpendicular to the bottom plate, a sleeve is arranged on the bottom plate, the driving push rod penetrates the sleeve in a sliding mode, the two ends of the driving push rod extend out of the sleeve, the driving handle winds the supporting arm to rotate to drive the handle connecting portion to rotate to drive the driving connecting rod to drive the driving push rod to move back and forth in the sleeve.

The utility model provides an above-mentioned one or more technical scheme in the protection shield test fixture have one of following technological effect at least: when the test board is used, the protection board is arranged in the installation groove on the bottom board, the test board corresponding to the test protection board is arranged to the drive end of the drive component, then the position of the back board is adjusted along the positioning long hole, so that the test needle on the protection board moves to be right above the test point of the protection board, the drive component drives the test board to move downwards relative to the bottom board, and the test needle on the test board is abutted against the test point on the protection board, so that the test on the protection board can be; when the protection boards of different models need to be tested, the protection board to be tested is installed to the installation groove, the test board corresponding to the protection board is replaced and connected to the driving end of the driving assembly, and then fine adjustment is carried out on the specific position of the test board along the positioning long hole so that the test pin can be just opposite to the test point. So, to the test of different model protection shields, only need to change the test panel of corresponding combination can, the test fixture commonality is strong, is applicable to the test of different model protection shields, in the production process, need not to make special test fixture to the protection shield of multiple different models, the effectual cost of manufacture who has saved test fixture.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a protection board testing fixture according to an embodiment of the present invention;

FIG. 2 is an exploded view of the testing fixture for a protection board shown in FIG. 1;

FIG. 3 is another view of the protection board testing fixture shown in FIG. 1;

FIG. 4 is a schematic structural diagram of a bottom plate of the protection board testing fixture shown in FIG. 1;

fig. 5 is a schematic structural diagram of a driving assembly of the protection board testing fixture shown in fig. 1.

Wherein, in the figures, the respective reference numerals:

10-bottom plate 11-mounting groove 12-positioning long hole

20-back plate 21-linear guide rail 30-test plate

31-test needle 40-drive assembly 41-support frame

42-driving push rod 43-driving handle 44-driving connecting rod

50-mounting plate 51-accommodating groove 60-connecting plate

61-clamping groove 62-sliding block 70-supporting plate

80-side plate 81-avoiding cavity 100-protective plate

101-connecting needle 411-supporting arm 412-sleeve

421-handle connection part 611-support table.

Detailed Description

In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, it is right to combine fig. 1 ~ 5 and embodiment below the utility model discloses further detailed description proceeds. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

As shown in fig. 1 to 5, an embodiment of the present invention provides a testing fixture for a protection board, which is used to test the protection board 100. Specifically, as shown in fig. 1 to 3, the protection board testing jig includes a bottom plate 10 and a back plate 20, a mounting groove 11 for installing the protection board 100 is provided on the bottom plate 10, a long positioning hole 12 is provided on the bottom plate 10, the back plate 20 is detachably connected to the bottom plate 10 and can move along the long positioning hole 12 to adjust the position of the back plate 20 relative to the mounting groove 11, a driving component 40 is installed on the back plate 20, the driving end of the driving component 40 is suspended above the mounting groove 11 and is detachably connected with a testing board 30, a testing pin 31 is installed on the testing board 30 for testing the protection board 100, the driving component 40 can drive the testing board 30 to move up and down relative to the bottom plate 10, so that the testing pin 31 contacts or is far away. That is, the test board 30 can be lifted and lowered by the driving assembly 40, when the protection board 100 is tested, the test board 30 is lowered to make the test pins 31 on the test board 30 contact the test points of the protection board 100, and the test of the protection board 100 is completed, after the test is completed, the test board 30 is lifted to make the protection board 100 be detached from the mounting groove 11, so that when the protection boards 100 of different models are tested, the replacement protection board 100 and the test board 30 can be conveniently detached, and the test board 30 is correspondingly replaced to be matched with the protection board 100 to be tested.

The utility model discloses protection shield test fixture, during the use, install protection shield 100 in mounting groove 11 on bottom plate 10, the test board 30 that corresponds test protection shield 100 is installed to the drive end of drive assembly 40, subsequently, along the position of location slot hole 12 regulation backplate 20, make the test needle 31 on protection shield 100 move to the test point of protection shield 100 directly over, drive assembly 40 drive test board 30 move down relatively to bottom plate 10, test needle 31 offsets with the test point on protection shield 100 on reaching test board 30 and can test protection shield 100; when the protection plates 100 of different models need to be tested, the protection plate 100 to be tested is mounted in the mounting groove 11, the corresponding test plate 30 is connected to the driving end of the driving component 40 in a replacement manner, and then the specific position of the test plate 30 is finely adjusted along the positioning long hole 12 so that the test needle 31 directly faces the test point. So, to the test of different model protection shields 100, only need to change the test panel 30 of corresponding combination can, the protection shield test fixture of this embodiment is applicable to the test of different model protection shields 100, and the test commonality is strong, in the production process, need not to make special test fixture to the protection shield 100 of multiple different models, the effectual cost of manufacture who has saved test fixture.

In another embodiment of the utility model, as shown in fig. 2 and 4, the length direction of location slot hole 12 parallels with the length direction of mounting groove 11, backplate 20 adjusts its relative mounting groove 11's position along the length direction of location slot hole 12, when testing point on test panel 30 and protection shield 100 exists the position deviation of horizontal direction promptly, along the length direction of location slot hole 12 about adjust backplate 20 can, so, thereby remove backplate 20 through removing about so that test panel 30 goes up test pin 31 and remove about relative protection shield 100, make test pin 31 can remove to just to the test point on protection shield 100, ensure that test pin 31 and test point are accurate to counterpoint.

In another embodiment of the present invention, as shown in fig. 2, fig. 3 and fig. 4, the back plate 20 is connected to the bottom plate 10 through screws (not shown) inserted into the positioning long holes 12, and the screws can move along the length direction of the positioning long holes 12 to change the installation position of the back plate 20, so that the back plate 20 can be detachably connected to the bottom plate 10 through the screws, when the position of the back plate 20 needs to be adjusted, the screws are unscrewed from the back plate 20, the back plate 20 is moved, and after the movement and positioning of the back plate, the screws are screwed again, the connection structure of the back plate 20 and the bottom plate 10 is simple, and the assembly, disassembly and position adjustment operations are very convenient.

Further, in this embodiment, as shown in fig. 2 and 4, at least two positioning long holes 12 are formed in the bottom plate 10 at intervals, two opposite ends of the back plate 20 are connected to the bottom plate 10 through two screws inserted into the two positioning long holes 12, the two ends of the back plate 20 are respectively provided with screws to connect to the bottom plate 10, and the connection between the back plate 20 and the bottom plate 10 is more stable and reliable.

It is understood that bolts or the like may be used instead of screws for fixing the back plate 20 in other embodiments of the present invention.

In another embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 3, the protection board testing jig further includes a mounting plate 50 adapted to be embedded in the mounting groove 11, and the mounting plate 50 is just opposite to the recessed accommodating groove 51 for accommodating the protection board 100 on the top surface of the testing board 30. Protection board 100 installs in storage tank 51 of mounting panel 50 promptly, and protection board 100 passes through mounting panel 50 and links to each other with bottom plate 10, and when changing protection board 100 and testing, take off mounting panel 50 from the mounting groove 11 in, will treat protection board 100 replacement of changing to storage tank 51 in the back, again with mounting panel 50 device mounting groove 11 can, the dismouting of protection board 100 is changed more conveniently.

Preferably, in this embodiment, a plurality of mounting plates 50 adapted to the mounting groove 11 may be provided for positioning and mounting different protection plates 100, when one of the mounting plates is placed on the bottom plate 10, the other protection plate 100 to be tested may be replaced, the replacement and the test of the protection plate 100 are not affected by each other, the test efficiency of the protection plate 100 can be improved, and the test period can be shortened.

In another embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 3, the protection board testing fixture further includes a connecting plate 60, the connecting plate 60 is connected to the driving end of the driving component 40, a slot 61 is formed in the connecting plate 60, the shape of the slot is matched with that of the testing board 30, and the testing board 30 is clamped in the slot 61. Like this, when testing the board 30 in the installation, with test the board 30 directly clamp dress to the connecting plate 60 can, test the dismouting operation of board 30 more convenient.

Further, in this embodiment, as shown in fig. 1 and fig. 2, the card slot 61 is located right above the mounting groove 11, the length direction of the card slot 61 is parallel to the length direction of the mounting groove 11, two ends of the test board 30 along the length direction abut against two side walls of the card slot 61, the width dimension of the card slot 61 is greater than the width dimension of the test board 30, and the test board 30 can move along the width direction of the card slot 61. Like this, test panel 30 clamps to draw-in groove 61 in, when there is position deviation in the width direction of mounting groove 11 at the test point on test needle 31 and protection shield 100, promotes test panel 30 and moves along draw-in groove 61 lateral wall, and at this moment, test panel 30 is relative bottom plate 10 back-and-forth movement to the realization is to the front and back position adjustment of the relative test point of test needle 31, and the counterpoint when further testing test panel 30 and protection shield 100 is accurate provides the guarantee.

In another embodiment of the present invention, as shown in fig. 1 and fig. 2, two supporting platforms 611 are protruded from two opposite side walls of the slot 61, and the two supporting platforms 611 correspondingly support two opposite ends of the testing board 30, so as to prevent the testing board 30 from coming off from the slot 61.

In another embodiment of the present invention, as shown in fig. 1 and fig. 2, the back plate 20 is vertically installed on the bottom plate 10, two linear guide rails 21 perpendicular to the bottom plate 10 are convexly disposed on the back plate 20 at intervals, two sliders 62 are connected to positions of the connecting plate 60 corresponding to the two linear guide rails 21, the two linear guide rails 21 are correspondingly clamped in the sliding grooves of the two sliders 62, and the driving assembly 40 drives the connecting plate 60 to move up and down along the linear guide rails 21 relative to the bottom plate 10. So, set up the spacing direction cooperation of linear guide 21 and slider 62, drive assembly 40 can reciprocate perpendicular bottom plate 10, appears moving the deviation and lead to the skew test point of test needle 31 when avoiding surveying test panel 30 and being driven by drive assembly 40 to remove, with the counterpoint accuracy of further improvement test.

In another embodiment of the present invention, as shown in fig. 1 and fig. 2, the protection board testing jig further includes four side plates 80, the bottom plate 10 is a rectangular plate, the four side plates 80 are respectively and vertically connected to four sides of the bottom plate 10, the four side plates 80 jointly avoid the cavity 81, the tank bottom of the mounting groove 11 is hollowed out and communicated with the avoiding cavity 81, the avoiding hole for the connection pin 101 for connecting the electric wire on the protection board 100 to be adapted to pass is formed on the mounting board 50, the mounting board 50 with the protection board 100 is mounted on the mounting groove 11, the connection pin 101 of the protection board 100 passes through the avoiding hole and goes deep into the cavity 81, thereby preventing the connection pin 101 of the protection board 100 from interfering with the normal operation of the test.

In another embodiment of the present invention, as shown in fig. 2, fig. 3 and fig. 4, the protection board testing fixture further includes a supporting board 70 for supporting the back board 20, one end of the supporting board 70 is detachably connected to the bottom board 10, one side of the supporting board 70 abuts against the back board 20 to support the back board 20, the position of the bottom board 10 corresponding to the connecting supporting board 70 is also provided with the positioning slot 12, so as to ensure that the supporting board 70 can follow the back board 20 to move synchronously, thereby realizing the positioning and supporting of the back board 20.

In another embodiment of the present invention, as shown in fig. 1, fig. 2 and fig. 5, the driving assembly 40 includes a supporting frame 41, a driving rod 42 and a driving handle 43, the supporting frame 41 has a first end and a second end which are relatively disposed, the driving rod 42 is movably disposed at the first end of the supporting frame 41 and is perpendicular to the bottom plate 10, the driving handle 43 is rotatably connected to the second end of the supporting frame 41, one end of the driving rod 42 is connected to the connecting plate 60 and forms the driving end of the driving assembly 40, the driving handle 43 is linked with the driving rod 42, and the driving handle 43 can drive the driving rod 42 to move linearly on the supporting frame 41 to drive the connecting plate 60 to keep away from or close to the bottom plate 10 when rotating. When it is desired to drive the test board 30 to move, the user holds the driving handle 43, applies a force to the driving handle 43, drives the driving handle 43 to rotate and drives the driving rod 42 to move synchronously, so as to drive the driving rod 42 to drive the connecting plate 60 to move together with the test board 30 to approach or move away from the mounting plate 50 on the base plate 10.

Preferably, as shown, the driving rod 42 is vertically connected between the two sliding blocks 62, and the rotation center point of the driving handle 43 relative to the rotation of the supporting arm 411 is located on the axis of the driving rod 42, so as to ensure that the driving assembly 40 always provides a force perpendicular to the base plate 10 to drive the test plate 30 to move, thereby raising or lowering the test plate 30.

Specifically, as shown in fig. 1 and 5, a support arm 411 is provided at a second end of the support frame 41, one end of the driving handle 43 close to the driving push rod 42 is hinged to the support arm 411, and one end of the driving handle 43 close to the driving push rod 42 is bent upwards to form a handle connection portion 421; the driving assembly 40 further includes a driving connecting rod 44, two opposite ends of the driving connecting rod 44 are respectively hinged to the ends of the handle connecting portion 421 and the driving push rod 42 away from the connecting plate 60, a sleeve 412 is disposed on the first end of the supporting frame 41 perpendicular to the bottom plate 10, the driving push rod 42 is slidably disposed in the sleeve 412, the two ends of the driving push rod 42 extend out of the sleeve 412, and the driving handle 43 rotates around the supporting arm 411 to drive the handle connecting portion 421 to rotate so as to drive the driving connecting rod 44 to drive the driving push rod 42 to move back and forth in the sleeve 412. When the test board 30 needs to be driven to move, a user holds one end of the driving handle 43 departing from the supporting arm 411 and applies force, the driving handle 43 rotates with the supporting arm 411 as a pivot, so as to drive the handle connecting part 421 to rotate to be close to or far away from the connecting plate 60, at the moment, the driving connecting rod 44 synchronously moves and drives the driving push rod 42 to drive the connecting plate 60 to drive the test board 30 to move up and down, and therefore the driving component 40 drives the test board 30 to reciprocate on the bottom plate 10.

Of course, in some other embodiments, the driving assembly 40 may also adopt other transmission structures, such as a ball screw, an electric screw, etc., so the driving assembly 40 is not limited herein.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a protection shield test fixture, its characterized in that, includes bottom plate and backplate, be provided with the mounting groove that supplies the protection shield installation on the bottom plate, the location slot hole has been seted up on the bottom plate, the backplate can dismantle connect in can follow on the bottom plate location slot hole removes with the adjustment the backplate is relative the position of mounting groove, install drive assembly on the backplate, drive assembly's drive end hangs to be located the top of mounting groove and detachable connection have the survey test panel of installing the test needle, drive assembly can drive survey the test panel relatively the bottom plate reciprocates, so that test needle contact or keep away from the test point on the protection shield.

2. The protection plate test fixture of claim 1, wherein: the length direction of the positioning long hole is parallel to the length direction of the mounting groove, and the position of the back plate relative to the mounting groove is adjusted along the length direction of the positioning long hole.

3. The protection plate test fixture of claim 1, wherein: the back plate is connected with the bottom plate through a screw inserted into the positioning long hole, and the screw can move along the length direction of the positioning long hole so as to change the installation position of the back plate.

4. The protection plate test fixture of claim 3, wherein: the bottom plate is provided with at least two positioning long holes at intervals, and the two opposite end parts of the back plate are respectively connected with the bottom plate through two screws inserted in the two positioning long holes.

5. The protection plate test fixture of claim 1, wherein: the protection board test fixture further comprises a mounting plate which is adapted to be embedded in the mounting groove, and the mounting plate is right opposite to the accommodating groove which is used for accommodating the protection board and is concavely arranged on the top surface of the test board.

6. The protection plate test fixture as claimed in any one of claims 1 to 5, wherein: the protection plate test fixture further comprises a connecting plate, the connecting plate is connected with the driving end of the driving assembly, a clamping groove matched with the test plate in shape is formed in the connecting plate, and the test plate is clamped in the clamping groove.

7. The protection plate test fixture of claim 6, wherein: the clamping groove is located right above the mounting groove, the length direction of the clamping groove is parallel to the length direction of the mounting groove, and the width dimension of the clamping groove is larger than that of the test board.

8. The protection plate test fixture of claim 6, wherein: the back plate is vertically arranged on the bottom plate, two linear guide rails perpendicular to the bottom plate are convexly arranged on the back plate at intervals, two sliding blocks are connected to positions of the connecting plate corresponding to the two linear guide rails, the two linear guide rails are correspondingly clamped in sliding grooves of the two sliding blocks, and the driving assembly drives the connecting plate to move up and down along the linear guide rails relative to the bottom plate.

9. The protection plate test fixture of claim 6, wherein: the driving assembly comprises a supporting frame, a driving push rod and a driving handle, the supporting frame is provided with a first end and a second end which are arranged oppositely, the driving push rod is movably arranged at the first end of the supporting frame and is perpendicular to the bottom plate, the driving handle is rotatably connected to the second end of the supporting frame, one end of the driving push rod is connected with the connecting plate to form a driving end of the driving assembly, the driving handle is linked with the driving push rod, and the driving handle can drive the driving push rod to move linearly on the supporting frame when rotating so as to drive the connecting plate to be far away from or close to the bottom plate.

10. The protection plate test fixture of claim 9, wherein: a support arm is arranged at the second end of the support frame, one end of the driving handle close to the driving push rod is hinged with the support arm, and one end of the driving handle close to the driving push rod is bent upwards and extends to form a handle connecting part;

the driving assembly further comprises a driving connecting rod, two opposite ends of the driving connecting rod are respectively hinged to the handle connecting portion and the end portion, far away from the connecting plate, of the driving push rod, the first end of the supporting frame is perpendicular to the bottom plate, a sleeve is arranged on the bottom plate, the driving push rod penetrates the sleeve in a sliding mode, the two ends of the driving push rod extend out of the sleeve, the driving handle winds the supporting arm to rotate to drive the handle connecting portion to rotate to drive the driving connecting rod to drive the driving push rod to move back and forth in the sleeve.

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