CN210837917U

CN210837917U - Tab positioning and adjusting mechanism

Info

Publication number: CN210837917U
Application number: CN201921850188.3U
Authority: CN
Inventors: 黎帆; 李奎; 常柯; 徐一帆
Original assignee: Kunshan Ju Innovative Energy Technology Co Ltd
Current assignee: Kunshan Ju Innovative Energy Technology Co Ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-06-23
Anticipated expiration: 2029-10-30

Abstract

The utility model discloses a utmost point ear location guiding mechanism, utmost point ear location guiding mechanism includes: the operation platform, the upper mounting plate, lower mounting plate, first drive arrangement and two second drive arrangement, utmost point ear is suitable for placing on operation platform, operation platform locates the top of upper mounting plate, the top of platform is down located to the upper mounting plate, upper mounting plate and lower platform can relative slip, first drive arrangement locates on the platform down, first drive arrangement is suitable for the drive upper mounting plate to remove along the X axle, two second drive arrangement locate on the platform down, and separate along the X axle, when two second drive arrangement have the same amount of feed, be suitable for the drive upper mounting plate to remove along the Y axle, when two second drive arrangement have different amounts of feed, be suitable for the drive upper mounting plate to rotate around the Z axle. According to the utility model discloses utmost point ear location guiding mechanism not only can make utmost point ear remove along X axle and Y axle, can also center on Z axle rotational positioning effectual, the flexibility good.

Description

Tab positioning and adjusting mechanism

Technical Field

The utility model belongs to the technical field of the electronic battery technique and specifically relates to a utmost point ear location guiding mechanism is related to.

Background

The lithium ion battery has the advantages of high energy density, long cycle life, low self-discharge rate and the like, and the lithium battery industry is rapidly developed in recent years. Lithium ion batteries are mainly classified into three types, namely square, cylindrical and soft packages at present; the soft bag has the advantages of small volume, light weight, high specific energy, high safety, flexible design and the like. Laminate polymer battery utmost point ear size is electric core equipment process key control point, and size such as utmost point ear interval, utmost point ear length is bad not only leads to electric core unable assembly in the module, may lead to safety risks such as electric core insulation is bad, weeping even. The size of the lug is mainly controlled by a lug positioning mechanism, the precision of the positioning mechanism directly influences the size of the lug, and the lug positioning mechanism in the prior art is poor in positioning effect and poor in flexibility.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide an utmost point ear location guiding mechanism, utmost point ear location guiding mechanism location is effectual, the flexibility is good.

According to the tab positioning and adjusting mechanism of the embodiment of the utility model, the tab positioning and adjusting mechanism comprises an operating platform, an upper platform, a lower platform, a first driving device and two second driving devices, the tab is suitable to be placed on the operating platform, the operating platform is arranged above the upper platform, the upper platform is arranged above the lower platform, the upper platform and the lower platform can slide relatively, the first driving device is arranged on the lower platform, the first driving device is suitable for driving the upper platform to move along an X axis, the two second driving devices are arranged on the lower platform, the two second driving devices are spaced along the X axis, are suitable for driving the upper platform to move along the Y axis when having the same feeding amount, and are suitable for driving the upper platform to rotate around the Z axis when having different feeding amounts.

According to the utility model discloses utmost point ear location guiding mechanism through set up first drive arrangement and two second drive arrangement on the platform down, not only can make utmost point ear remove along X axle and Y axle, can also rotate around the Z axle to can adjust the position of utmost point ear better, and then be favorable to the processing operation of utmost point ear better, location effect is good, the flexibility is good.

In addition, according to the utility model discloses a utmost point ear location guiding mechanism can also have following additional technical characterstic:

in some embodiments of the present invention, in the X-axis direction, the first driving device is located on one side of the upper platform, the tab positioning adjustment mechanism further includes a first elastic component located on the other side of the upper platform, the first elastic component is adapted to make the upper platform and the first driving device maintain the abutment.

Optionally, the first driving device includes a first mounting plate and a first micrometer, the first mounting plate is disposed on the lower platform, the first micrometer is disposed on the first mounting plate, and the first micrometer is adapted to drive the upper platform to move toward the first elastic assembly.

Optionally, the first elastic assembly comprises a second mounting plate and a spring plunger, the second mounting plate is arranged on the lower platform, the spring plunger is arranged on the second mounting plate, the spring plunger is suitable for enabling the upper platform to be abutted against the first micrometer, and the spring plunger is coaxially arranged with the first micrometer.

In some embodiments of the present invention, a first stop and a second stop are disposed on the upper platform, the first stop is disposed on one side of the upper platform along the X axis, the second stop is disposed on the other side of the upper platform along the X axis, the first driving device and the second driving device respectively abut against the first stop, and the first elastic component and the second driving device respectively abut against the second stop.

In some embodiments of the present invention, the tab positioning adjustment mechanism further comprises: and the two second elastic assemblies and the two second driving devices are respectively arranged on two sides of the upper platform in a one-to-one correspondence manner in the Y-axis direction, and the two second elastic assemblies respectively enable the second driving devices at corresponding positions to be kept in butt joint with the upper platform.

Optionally, the second driving device comprises: the third mounting plate is arranged on the lower platform, the second micrometer is arranged on the third mounting plate, the second micrometer of the second driving device is suitable for driving the upper platform to move along the Y axis when the second micrometer has the same feeding amount, and the second driving device is suitable for driving the upper platform to rotate around the Z axis when the second micrometer has different feeding amounts.

Optionally, the second elastic component comprises: the first spring column is arranged on the upper platform, the second spring column is arranged on the lower platform, the first spring column and the second spring column are arranged at intervals along the Y-axis direction, two ends of the middle spring are fixed on the first spring column and the second spring column respectively, and the middle spring extends along the Y-axis direction and is arranged coaxially with the second micrometer.

The utility model discloses an in some embodiments, be equipped with two at least instruction rulers on the upper mounting plate, the platform orientation down the side of upper mounting plate is formed with the sign region, the instruction ruler is suitable for be in move in the sign region, with the sign the upper mounting plate with relative movement's distance between the lower platform.

In some embodiments of the present invention, the tab positioning adjustment mechanism further includes a rolling connection device, the rolling connection device is disposed between the upper platform and the lower platform, so that the upper platform and the lower platform slide relatively to each other, the rolling connection device includes: the upper fixing plate is arranged on the side face, facing the lower platform, of the upper platform, the lower fixing plate is arranged on the side face, facing the upper platform, of the lower platform, and the thrust ball bearing is arranged between the upper fixing plate and the lower fixing plate.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of an angle of a tab positioning adjustment mechanism according to an embodiment of the present invention;

fig. 2 is a schematic structural view of another angle of the tab positioning and adjusting mechanism according to the embodiment of the present invention

FIG. 3 is an enlarged view of area A of FIG. 2;

fig. 4 is a front view of a tab positioning adjustment mechanism according to an embodiment of the present invention.

Reference numerals:

100: a tab positioning and adjusting mechanism;

1: an operating platform;

2: an upper platform; 21: a first stopper; 22: a second stopper; 23: an indication ruler; 3: a lower platform;

4: a first driving device; 41: a first mounting plate; 42: a first micrometer;

5: a second driving device; 51: a third mounting plate; 52: a second micrometer;

6: a first elastic member; 61: a second mounting plate; 62: a spring plunger;

7: a second elastic member; 71: a first spring post; 72: a second spring post; 73: a middle spring;

8: a rolling connection device;

9: and (7) a tab.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, 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 otherwise specified.

A tab positioning adjustment mechanism 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 4.

As shown in fig. 1 to 4, the tab positioning adjustment mechanism 100 according to the embodiment of the present invention includes an operation platform 1, an upper platform 2, and a lower platform 3.

Specifically, the tab 9 is adapted to be placed on the operation platform 1 to perform a machining operation on the tab 9.

Operation platform 1 locates the top of upper mounting plate 2, and upper mounting plate 2 locates the top of lower platform 3, and upper mounting plate 2 and lower platform 3 can relative slip, for example as shown in fig. 1, be lower platform 3, upper mounting plate 2 and operation platform 1 in proper order on the direction from bottom to top, and upper mounting plate 2 can drive operation platform 1 and remove for lower platform 3 to can carry out the adjustment of position to placing utmost point ear 9 on operation platform 1, and then can conveniently carry out the processing operation to utmost point ear 9.

Further, the tab positioning adjustment mechanism 100 further includes a first driving device 4 and two second driving devices 5.

Specifically, the first driving device 4 is disposed on the lower platform 3, the first driving device 4 is adapted to drive the upper platform 2 to move along the X-axis, the two second driving devices 5 are disposed on the lower platform 3 and spaced apart along the X-axis, the two second driving devices 5 are adapted to drive the upper platform 2 to move along the Y-axis when having the same feeding amount, and the two second driving devices 5 are adapted to drive the upper platform 2 to rotate around the Z-axis when having different feeding amounts. As shown in fig. 1, the X axis may refer to a straight line in the left-right direction, the Y axis may refer to an axis in the front-back direction, and the Z axis may refer to a straight line in the up-down direction.

That is, the first driving device 4 may drive the upper stage 2 to move along the X axis, so that the tab 9 may move along the X axis, the two second driving devices 5 may drive the upper stage 2 to move along the Y axis when having the same feeding amount, so that the tab 9 may move along the Y axis, and the two second driving devices 5 may drive the upper stage 2 to rotate around the Z axis when having different feeding amounts, so that the tab 9 may rotate around the Z axis.

Therefore, according to the utility model discloses utmost point ear location guiding mechanism 100 through set up first drive arrangement 4 and two second drive arrangement 5 on platform 3 down, not only can make utmost point ear 9 remove along X axle and Y axle, can also rotate around the Z axle to can adjust utmost point ear 9's position better, and then be favorable to utmost point ear 9's processing operation better, location effect is good, the flexibility is good.

In some embodiments of the present invention, as shown in fig. 1 and 2, the tab positioning adjustment mechanism 100 further includes a first elastic assembly 6, in the X-axis direction, the first driving device 4 is located on one side of the upper platform 2, the first elastic assembly 6 is located on the other side of the upper platform 2, and the first elastic assembly is adapted to make the upper platform 2 and the first driving device 4 keep abutting. Here, the direction from right to left as shown in fig. 1 may be referred to in the X-axis direction, for example, as shown in fig. 1, in the X-axis direction, the first driving device 4 is located at the rear side of the upper platform 2 and abuts against the rear side surface of the upper platform 2, and the first elastic component 6 is located at the front side of the upper platform 2 and abuts against the front side surface of the upper platform 2, so that, in the X-axis direction, the upper platform 2 may be relatively stably limited between the first driving device 4 and the first elastic component 6, and it can be understood that, after the first driving device 4 drives the upper platform 2 to move by a distance, the upper platform 2 may be kept stationary, so that the tab 9 placed on the operating platform 1 may be kept stationary, and further, the tab 9 may be better processed, and the stability is good.

In some embodiments of the utility model, as shown in fig. 1 and fig. 2, first drive arrangement 4 includes first mounting panel 41 and first micrometer 42, first mounting panel 41 is located down on platform 3, first micrometer 42 is located on first mounting panel 41, first micrometer 42 is suitable for drive upper platform 2 and moves towards first elastic component 6, thereby, through installing first micrometer 42 on first mounting panel 41, can make first micrometer 42 drive upper platform 2 remove comparatively steadily, and further, the feed volume of first micrometer 42 is comparatively accurate, can drive upper platform 2 and remove in less within range, thereby make utmost point ear location adjustment mechanism 100 can adjust the position of utmost point ear 9 of X axle direction in less within range, thereby can better fix a position the processing to the X axle direction of utmost point ear 9.

Optionally, as shown in fig. 1 and fig. 2, the first elastic assembly 6 includes a second mounting plate 61 and a spring plunger 62, the second mounting plate 61 is disposed on the lower platform 3, the spring plunger 62 is disposed on the second mounting plate 61, the spring plunger 62 is adapted to abut the upper platform 2 with the first micrometer 42, the first micrometer 42 can drive the upper platform 2 to overcome the elastic force of the spring plunger 62, so as to move the upper platform 2 toward the spring plunger 62, further, the spring plunger 62 is disposed coaxially with the first micrometer 42, and therefore, the spring plunger 62 can cooperate with the first micrometer 42 to better drive the upper platform 2 to move along the X axis, and can also prevent the upper platform 2 from shifting when moving along the X axis, which is good in stability.

In some embodiments of the present invention, as shown in fig. 1 and 2, a first stop 21 and a second stop 22 are disposed on the upper platform 2, the first stop 21 is disposed on one side of the upper platform 2 along the X axis, the second stop 22 is disposed on the other side of the upper platform 2 along the X axis, the first driving device 4 and the second driving device 5 are respectively abutted against the first stop 21, and the first elastic component 6 and the second driving device 5 are respectively abutted against the second stop 22.

For example, as shown in fig. 1 and 2, the first stopper 21 is disposed on the left side surface of the upper platen 2, the second stopper 22 is disposed on the right side surface of the upper platen 2, the first stopper 21 and the second stopper 22 may be formed in an L shape, the first driving device 4 and the right second driving device 5 are both abutted on the second stopper 22, and the first elastic member 6 and the left second driving device 5 are both abutted on the first stopper 21, so that the first driving device 4, the second driving device 5, and the first elastic member 6 may not directly contact with the upper platen 2, and damage to the upper platen 2 may be prevented.

Optionally, the first stopper 21 and the second stopper 22 are detachably disposed on the upper platform 2, so that the first stopper 21 and the second stopper 22 can be conveniently replaced and maintained, and the working efficiency of the tab positioning and adjusting mechanism 100 can be improved.

In some embodiments of the present invention, the tab positioning adjustment mechanism 100 includes two second elastic assemblies 7, and in the Y-axis direction, the two second elastic assemblies 7 and the two second driving devices 5 are respectively disposed on two sides of the upper platform 2 in a one-to-one correspondence manner, and the two second elastic assemblies 7 respectively enable the second driving devices 5 corresponding to the positions to maintain the butt with the upper platform 2.

For convenience of description, the second elastic component 7 located on the left side is referred to as a left second elastic component, the second elastic component 7 located on the right side is referred to as a right second elastic component, the second driving device 5 located on the left side is referred to as a left second driving device, and the second driving device 5 located on the right side is referred to as a right second driving device, so that, in the Y-axis direction, the left second elastic component is disposed corresponding to the left second driving device, the right second elastic component is disposed corresponding to the second driving device, the left second elastic component and the left second driving device can better limit the position of the left end of the upper platform 2, and the right second elastic component and the right second driving device can better limit the position of the right end of the upper platform 2, which not only can facilitate the stability of the upper platform 2, but also can facilitate the movement of the upper platform 2 along the Y-axis and the rotation around the Z-axis.

Alternatively, as shown in fig. 1 and 2, the second driving device 5 includes a third mounting plate 51 and second micrometers 52, the third mounting plate 51 is disposed on the lower platform 3, the second micrometers 52 are disposed on the third mounting plate 51, the second micrometers 52 of the two second driving devices 5 are adapted to drive the upper platform 2 to move along the Y-axis when having the same feeding amount, and the second micrometers 52 of the two second driving devices 5 are adapted to drive the upper platform 2 to rotate around the Z-axis when having different feeding amounts.

From this, through locating second micrometer 52 on third mounting panel 51, can be so that platform 2 removes in the comparatively stable drive of second micrometer 52, simultaneously, second micrometer 52's the volume of feeding is comparatively accurate, can drive platform 2 and remove in less within range to make utmost point ear location guiding mechanism 100 can adjust the position of utmost point ear 9 in Y axle direction in less within range, thereby can fix a position processing to the Y axle direction of utmost point ear 9 better.

Alternatively, as shown in fig. 1 to 3, the second elastic assembly 7 includes a first spring post 71, a second spring post 72, and an intermediate spring 73, the first spring post 71 is disposed on the upper platform 2, the second spring post 72 is disposed on the lower platform 3, the first spring post 71 and the second spring post 72 are disposed at a distance along the Y-axis direction, and two ends of the intermediate spring 73 are respectively fixed to the first spring post 71 and the second spring post 72. For example, as shown in fig. 2 and 3, the first spring post 71 is located at the front side of the second spring post 72, when the second micrometer 52 drives the upper platform 2 to move towards the rear side, the second micrometer 52 is screwed to overcome the elastic force of the middle spring 73 to stretch the middle spring 73, and when the second micrometer 52 rotates reversely to reduce the feeding amount, the middle spring 73 can drive the upper platform 2 to move towards the front side, so that the front side and the rear side of the upper platform 2 are always kept in abutment with the second driving device 5 and the second elastic assembly 7, and the upper platform 2 has better stability.

It is understood that the first spring post 71 may be located at the rear side of the second spring post 72, which is not limited herein.

Further, middle spring 73 extends along the Y-axis direction, and is disposed coaxially with second micrometer 52, so that two second micrometers 52 can feed the same amount, upper platform 2 can be driven well to move along the Y-axis, and upper platform 2 can be prevented from shifting along the Y-axis, and stability is good.

In some embodiments of the present invention, as shown in fig. 1 and fig. 2, at least two indicating rulers 23 are provided on the upper platform 2, that is, two indicating rulers 23 may be provided, or three or more indicating rulers may be provided, which is not limited herein. The side of the lower platform 3 facing the upper platform 2 is formed with an identification area within which an indicator scale 23 is adapted to move to identify the distance of relative movement between the upper platform 2 and the lower platform 3. From this, through the cooperation of instruction chi 23 and sign region, can obtain better between upper mounting plate 2 and the lower mounting plate 3 at X axle, Y axle displacement distance and the rotation distance of Z axle, not only can fix a position the utmost point ear 9 of same type betterly, also can fix a position the utmost point ear 9 of different grade type comparatively fast, can practice thrift positioning time to improve work efficiency.

In some embodiments of the present invention, as shown in fig. 1-4, the tab positioning adjustment mechanism 100 further includes a rolling connection device 8, the rolling connection device 8 is disposed between the upper platform 2 and the lower platform 3 to enable relative sliding between the upper platform 2 and the lower platform 3, the rolling connection device 8 includes an upper fixing plate, a lower fixing plate and at least one thrust ball bearing, the upper fixing plate is disposed on the side of the upper platform 2 facing the lower platform 3, the lower fixing plate is disposed on the side of the lower platform 3 facing the upper platform 2, and the thrust ball bearing is disposed between the upper fixing plate and the lower fixing plate.

That is, through set up the upper fixed plate between thrust ball bearing and upper mounting plate 2, can make thrust ball bearing better and the upper fixed plate cooperation, through set up the bottom plate between thrust ball bearing and lower mounting plate 3, can make thrust ball bearing better and the bottom plate cooperation, thrust ball bearing cooperation is installed back between upper fixed plate and bottom plate, and upper fixed plate and bottom plate can restrict thrust ball bearing's activity region to make thrust ball bearing roll between upper fixed plate and bottom plate steadily.

Further, the thrust ball bearing has better rolling capacity, and after the thrust ball bearing is installed between the upper fixing plate and the lower fixing plate in a matching mode, the upper fixing plate and the lower fixing plate can better move along the X axis and the Y axis and rotate around the Z axis, so that the upper platform 2 and the lower platform 3 can better move along the X axis and the Y axis and rotate around the Z axis, and the lug 9 can better move along the X axis and the Y axis and rotate around the Z axis, and the flexibility is good.

Further, by providing a plurality of thrust ball bearings, the relative movement between the upper and lower platforms 2, 3 can be facilitated.

Other constructions and operations of the tab positioning adjustment mechanism 100 according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "some embodiments," "optionally," "further," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A tab positioning and adjusting mechanism is characterized by comprising:

the lug is suitable for being placed on the operating platform;

the operation platform is arranged above the upper platform, the upper platform is arranged above the lower platform, and the upper platform and the lower platform can slide relatively;

the first driving device is arranged on the lower platform and is suitable for driving the upper platform to move along the X axis;

the two second driving devices are arranged on the lower platform and are spaced along the X axis, the two second driving devices are suitable for driving the upper platform to move along the Y axis when having the same feeding amount, and the two second driving devices are suitable for driving the upper platform to rotate around the Z axis when having different feeding amounts.

2. The tab positioning adjustment mechanism according to claim 1, wherein the first driving device is located on one side of the upper platform in the X-axis direction, and the tab positioning adjustment mechanism further comprises:

a first resilient assembly located on the other side of the upper platform, the first resilient assembly being adapted to hold the upper platform in abutment with the first drive means.

3. The tab positioning adjustment mechanism according to claim 2, wherein the first driving means comprises:

the first mounting plate is arranged on the lower platform;

the first micrometer is arranged on the first mounting plate and is suitable for driving the upper platform to move towards the first elastic assembly.

4. The tab positioning adjustment mechanism according to claim 3, wherein the first elastic assembly comprises:

the second mounting plate is arranged on the lower platform;

spring plunger, spring plunger locates on the second mounting panel, spring plunger is suitable for so the upper mounting plate with first thousandth chi butt, spring plunger with the coaxial setting of first thousandth chi.

5. The tab positioning and adjusting mechanism according to claim 2, wherein the upper platform is provided with a first stop and a second stop, the first stop is disposed on one side of the upper platform along the X-axis, the second stop is disposed on the other side of the upper platform along the X-axis, the first driving device and one of the second driving devices are respectively abutted against the first stop, and the first elastic assembly and the other second driving device are respectively abutted against the second stop.

6. The tab positioning adjustment mechanism according to claim 1, further comprising:

and the two second elastic assemblies and the two second driving devices are respectively arranged on two sides of the upper platform in a one-to-one correspondence manner in the Y-axis direction, and the two second elastic assemblies respectively enable the second driving devices at corresponding positions to be kept in butt joint with the upper platform.

7. The tab positioning adjustment mechanism according to claim 6, wherein the second driving means comprises:

the third mounting plate is arranged on the lower platform;

the second micrometers are arranged on the third mounting plate, the second micrometers of the two second driving devices are suitable for driving the upper platform to move along the Y axis when having the same feeding amount, and the second micrometers of the two second driving devices are suitable for driving the upper platform to rotate around the Z axis when having different feeding amounts.

8. The tab positioning adjustment mechanism according to claim 7, wherein the second elastic assembly comprises:

the first spring column is arranged on the upper platform;

the second spring column is arranged on the lower platform, and the first spring column and the second spring column are arranged at intervals along the Y-axis direction;

and two ends of the middle spring are respectively fixed on the first spring column and the second spring column, and the middle spring extends along the Y-axis direction and is coaxially arranged with the second micrometer.

9. The tab positioning and adjusting mechanism according to claim 1, wherein the upper platform is provided with at least two indicating rules, and a marking area is formed on a side surface of the lower platform facing the upper platform, and the indicating rules are adapted to move in the marking area to mark a distance of relative movement between the upper platform and the lower platform.

10. The tab positioning adjustment mechanism according to claim 1, further comprising:

a rolling connection device disposed between the upper platform and the lower platform to allow relative sliding between the upper platform and the lower platform, the rolling connection device comprising:

the upper fixing plate is arranged on the side surface, facing the lower platform, of the upper platform;

the lower fixing plate is arranged on the side surface, facing the upper platform, of the lower platform;

at least one thrust ball bearing disposed between the upper and lower fixed plates.