CN215688708U

CN215688708U - Over-and-under type animal experiment table

Info

Publication number: CN215688708U
Application number: CN202121225898.4U
Authority: CN
Inventors: 李利新; 吕昕泽
Original assignee: XUHE (TIANJIN) YIYAOKEJIYOUXIANGONGSI
Current assignee: XUHE (TIANJIN) YIYAOKEJIYOUXIANGONGSI
Priority date: 2021-06-02
Filing date: 2021-06-02
Publication date: 2022-02-01
Anticipated expiration: 2031-06-02

Abstract

The application provides a lifting type animal experiment table, and belongs to the technical field of animal experiments. The lifting type animal experiment table comprises a lifting component, a lifting component and a fixing component. The frame body is fixed at two ends above the movable base, the motor is fixed at one side below the frame body, one end of the shaft rod is connected with the output end of the motor, and two ends of the movable plate are in threaded connection with the screw rods. The table top is fixed on the top end of the adjusting rod, the electric push rod is fixed on one side of the adjusting rod, the output end of the electric push rod is connected with the adjusting rod in a sliding mode, the adjusting column is fixed at one end above the table top, and the illuminating lamp is rotatably connected to one end of the adjusting column. The height of the experiment table can be adjusted according to the height of a user, the position of the animal can be fixed, convenience in operation of the user is facilitated, and the experiment effect is improved.

Description

Over-and-under type animal experiment table

Technical Field

The application relates to the field of animal experiments, in particular to a lifting type animal experiment table.

Background

Animal experiments refer to scientific research using animals in order to gain new knowledge about biology, medicine, etc. or solve specific problems in laboratories, and animal experiments must be performed by or under the guidance of trained personnel with academic or professional skills.

When an animal experiment is carried out, experiments are often required to be carried out on the experiment table, most of the existing experiment tables are fixedly arranged and cannot be adjusted according to the heights of users, so that the users are inconvenient to operate during the experiment, the experiment effect is influenced, meanwhile, when the existing experiment tables are used, devices for fixing the animals are lacked, the operation of the users is further influenced, and how to invent the lifting type animal experiment table to improve the problems becomes the problem which needs to be solved at present.

SUMMERY OF THE UTILITY MODEL

In order to compensate more than not enough, this application provides a over-and-under type animal experiment table, aim at improving that current laboratory bench is fixed setting mostly, can not adjust according to user's height to it is inconvenient to lead to the user to operate when experimenting, has influenced the experiment effect, and current laboratory bench lacks the device of fixing to the animal when using simultaneously, has also further caused the problem of influence to user's operation.

The embodiment of the application provides a lifting type animal experiment table which comprises a lifting component, a lifting component and a fixing component.

The lifting assembly comprises a movable base, a frame body, a motor, a shaft rod, a first bevel gear, a screw rod, a second bevel gear and a movable plate, wherein the frame body is fixed at two ends of the upper portion of the movable base, the motor is fixed at one side of the lower portion of the frame body, one end of the shaft rod is connected with the output end of the motor, the first bevel gear is fixed on the shaft rod, one end of the screw rod is rotatably connected with the upper portion of the frame body, the second bevel gear is fixed at the other end of the screw rod, the second bevel gear is meshed with the first bevel gear, and two ends of the movable plate are in threaded connection with the screw rod.

The lifting subassembly is including adjusting pole, mesa, electric putter, regulation post and light, it fixes to adjust the pole the upper surface of movable plate, the mesa is fixed the top of adjusting the pole, electric putter fixes one side of adjusting the pole, electric putter's output with adjust pole sliding connection, it fixes to adjust the post the top one end of mesa, the light rotates to be connected the one end of adjusting the post.

Fixed subassembly includes threaded rod, buffering splint, first connecting band, second connecting band and regulating part, threaded rod threaded connection be in the top both sides of mesa, buffering splint are fixed the one end of threaded rod, the regulating part sets up on the mesa, first connecting band with the second connecting band respectively with the regulating part is connected.

In the implementation process, the shaft lever and the first bevel gear are driven to rotate by the starting motor, and the first bevel gear is meshed with the second bevel gear, so that the second bevel gear drives the screw to rotate, the movable plate moves relative to the screw, and the position height of the table top is adjusted. The electric push rod is started to drive the adjusting rod to move, so that the length of the adjusting rod is adjusted, and the position height of the table top is adjusted again. The height of the adjusting column can be changed to adjust the position height of the illuminating lamp, so that the illuminating effect of the illuminating lamp is improved, and the operation is facilitated. Drive the removal of buffering splint through rotating the threaded rod, realize buffering splint and animal and contact, realized that buffering splint centre gripping is fixed the animal each other, bind fixedly the animal through binding first connecting band and second connecting band, be favorable to adjusting the position of first connecting band and second connecting band through setting up the regulating part to be favorable to improving and bind fixed effect. The height of the experiment table can be adjusted according to the height of a user, the position of the animal can be fixed, convenience in operation of the user is facilitated, and the experiment effect is improved.

In a specific embodiment, the mobile base comprises a base plate and mobile wheels fixed below the base plate.

In the above-mentioned realization process, it is favorable to removing the laboratory bench to set up the removal wheel, has improved the flexibility of laboratory bench, sets up the bottom plate and is favorable to supporting the framework.

In a specific embodiment, a base plate is connected below the motor, and one side of the base plate is connected with the frame body.

In the implementation process, the base plate is favorable for fixing the motor and the frame body, and the fixing effect of the motor is improved.

In a specific embodiment, the moving plate comprises a threaded sleeve and a supporting plate, the threaded sleeve is sleeved on the threaded rod in a threaded manner, and two ends of the supporting plate are fixedly connected with the threaded sleeve.

In the implementation process, the shaft lever and the first bevel gear are driven to rotate through the starting motor, so that the threaded rod is driven to rotate, the threaded sleeve moves relative to the threaded rod, and the position height of the supporting plate and the position height of the table top are adjusted.

In a particular embodiment, the adjustment lever comprises a first lever body fixed above the support plate and a second lever body slidably connected above the first lever body.

In the implementation process, the second rod body is connected with the first rod body in a sliding mode, so that the distance between the second rod body and the first rod body can be adjusted, and the length of the adjusting rod can be changed conveniently.

In a specific implementation scheme, a connecting block is fixed on the second rod body, and the output end of the electric push rod is connected with the connecting block.

In the implementation process, the electric push rod is started to drive the connecting block to move, so that the second rod body moves relative to the first rod body, and the position height of the table top is adjusted again.

In a specific embodiment, the adjusting column comprises a first column body, a second column body and an adjusting knob, the first column body is fixed at one end of the upper portion of the table board, the second column body is slidably connected above the first column body, and the adjusting knob is fixed on the second column body.

In the implementation process, the adjusting knob can fix the distance between the first cylinder and the second cylinder, and the position height of the illuminating lamp can be adjusted by changing the distance between the first cylinder and the second cylinder, so that the illuminating effect of the illuminating lamp is improved, and the operation is facilitated.

In a specific embodiment, the two sides above the table top are connected with connecting sleeves, the threaded rod is in threaded connection with the connecting sleeves, and a rotating hand wheel is fixed at one end of the threaded rod.

In the implementation process, the threaded rod is connected with the table board through the connecting sleeve in a threaded mode, and the threaded rod is favorably rotated by the aid of the rotary hand wheel.

In a specific embodiment, the buffer clamping plate comprises a connecting plate, a spring and a plate body, wherein the connecting plate is connected with the other end of the threaded rod, one end of the spring is connected with the connecting plate, and the plate body is connected with the other end of the spring.

In the above-mentioned realization process, drive the plate body through rotating the threaded rod and remove, realize that the plate body contacts with the animal, realized that the plate body centre gripping is fixed the animal each other, set up the spring and be favorable to providing the buffering, reduce the injury that the plate body centre gripping led to the fact the animal.

In a specific embodiment, be provided with first magic subsides on the first connecting band, be provided with second magic subsides on the second connecting band, first magic subsides with the second magic is pasted and is bonded each other, the regulating part includes the slider, the spout has been seted up on the mesa, slider sliding connection be in the spout, the slider respectively with first connecting band with the one end of second connecting band is connected.

In the implementation process, the first magic tape and the second magic tape are bonded with each other, the first connecting belt and the second connecting belt are bound and fixed to the animal, the positions of the first connecting belt and the second connecting belt are adjusted by the aid of the sliding grooves and the sliding blocks, and accordingly the binding and fixing effect is improved.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a schematic structural diagram of a lift type animal experiment table provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a lift assembly according to an embodiment of the present disclosure;

FIG. 3 is a schematic illustration of a lift assembly according to an embodiment of the present disclosure;

fig. 4 is a schematic view of a connection structure of an illumination lamp according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a fixing assembly according to an embodiment of the present disclosure.

In the figure: 100-a lifting assembly; 110-a mobile base; 112-a backplane; 114-a moving wheel; 120-a frame body; 130-a motor; 132-a backing plate; 140-a shaft rod; 150-a first bevel gear; 160-screw; 170-second bevel gear; 180-moving the plate; 182-a threaded sleeve; 184-a support plate; 200-a lift assembly; 210-adjusting rod; 212-a first rod; 214-a second stick body; 220-a table top; 230-an electric push rod; 232-connecting block; 240-a conditioning column; 242-a first cylinder; 244-a second cylinder; 246-adjusting knob; 250-lighting lamps; 300-a stationary component; 310-a threaded rod; 312-connecting sleeve; 314-rotating the handwheel; 320-buffer clamping plate; 322-a connecting plate; 324-a spring; 326-plate body; 330-first connecting strip; 332-a first magic tape; 340-a second connecting strip; 342-a second magic tape; 350-an adjusting part; 352-a chute; 354-slider.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.

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 application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1-5, the present application provides a technical solution: an elevating animal experiment table comprises an elevating component 100, an elevating component 200 and a fixing component 300.

Referring to fig. 1-5, the lifting assembly 100 includes a movable base 110, a frame 120, a motor 130, a shaft 140, a first bevel gear 150, a screw 160, a second bevel gear 170, and a movable plate 180, wherein the movable base 110 includes a bottom plate 112 and a movable wheel 114, and the movable wheel 114 is fixed below the bottom plate 112. The movable wheels 114 are arranged to facilitate the movement of the experiment table, so that the flexibility of the experiment table is improved, and the bottom plate 112 is arranged to facilitate the support of the frame body 120. The frame 120 is fixed at both ends of the upper part of the movable base 110, the motor 130 is fixed at one side of the lower part of the frame 120, a backing plate 132 is connected to the lower part of the motor 130, and one side of the backing plate 132 is connected to the frame 120. The setting of the backing plate 132 facilitates the fixation of the motor 130 and the frame body 120, and improves the fixation effect of the motor 130. One end of the shaft rod 140 is connected with the output end of the motor 130, the first bevel gear 150 is fixed on the shaft rod 140, one end of the screw 160 is rotatably connected with the upper part of the frame body 120, the second bevel gear 170 is fixed at the other end of the screw 160, the second bevel gear 170 is meshed with the first bevel gear 150, and two ends of the moving plate 180 are in threaded connection with the screw 160. The moving plate 180 comprises a threaded sleeve 182 and a supporting plate 184, the threaded sleeve 182 is sleeved on the screw 160 in a threaded manner, and two ends of the supporting plate 184 are fixedly connected with the threaded sleeve 182. By starting the motor 130, the shaft 140 and the first bevel gear 150 are rotated to rotate the screw 160, and the threaded sleeve 182 moves relative to the screw 160, so as to adjust the height of the supporting plate 184 and the table-board 220.

Referring to fig. 1 to 5, the lifting assembly 200 includes an adjustment lever 210, a table 220, an electric push rod 230, an adjustment post 240 and a lamp 250, the adjustment lever 210 is fixed on the upper surface of the moving plate 180, the adjustment lever 210 includes a first lever 212 and a second lever 214, the first lever 212 is fixed above the supporting plate 184, and the second lever 214 is slidably connected above the first lever 212. The second rod 214 is slidably connected to the first rod 212, so that the distance between the second rod 214 and the first rod 212 can be adjusted, thereby facilitating the change of the length of the adjustment rod 210. The table top 220 is fixed at the top end of the adjusting rod 210, the electric push rod 230 is fixed at one side of the adjusting rod 210, the output end of the electric push rod 230 is slidably connected with the adjusting rod 210, a connecting block 232 is fixed on the second rod body 214, and the output end of the electric push rod 230 is connected with the connecting block 232. The electric push rod 230 is activated to drive the connecting block 232 to move, so that the second rod body 214 moves relative to the first rod body 212, and the position and the height of the table-board 220 are adjusted again. The adjusting column 240 is fixed at one end above the table-board 220, and the illuminating lamp 250 is rotatably connected at one end of the adjusting column 240. The adjustment post 240 includes a first post 242, a second post 244, and an adjustment knob 246, the first post 242 being fixed to the top end of the table top 220, the second post 244 being slidably coupled to the top of the first post 242, and the adjustment knob 246 being fixed to the second post 244. The adjusting knob 246 can fix the distance between the first cylinder 242 and the second cylinder 244, and the height of the position of the illumination lamp 250 can be adjusted by changing the distance between the first cylinder 242 and the second cylinder 244, so that the illumination effect of the illumination lamp 250 can be improved, and the operation can be more facilitated.

Referring to fig. 1 to 5, the fixing assembly 300 includes a threaded rod 310, a buffer clamp plate 320, a first connecting band 330, a second connecting band 340, and an adjusting member 350, the threaded rod 310 is screwed on two sides above the table-board 220, two sides above the table-board 220 are connected with connecting sleeves 312, the threaded rod 310 is screwed with the connecting sleeves 312, and a rotating handwheel 314 is fixed on one end of the threaded rod 310. The threaded rod 310 is connected with the table top 220 through a connecting sleeve 312 in a threaded manner, and the rotating handwheel 314 is arranged to facilitate rotation of the threaded rod 310. The buffer clamping plate 320 is fixed at one end of the threaded rod 310, the buffer clamping plate 320 comprises a connecting plate 322, a spring 324 and a plate body 326, the connecting plate 322 is connected with the other end of the threaded rod 310, one end of the spring 324 is connected with the connecting plate 322, and the plate body 326 is connected with the other end of the spring 324. Drive plate body 326 through rotating threaded rod 310 and remove, realize plate body 326 and animal and contact, realized plate body 326 and fixed the animal each other the centre gripping, set up spring 324 and be favorable to providing the buffering, reduce the injury that plate body 326 centre gripping led to the fact the animal. The adjusting member 350 is disposed on the table top 220, and the first connecting band 330 and the second connecting band 340 are connected to the adjusting member 350, respectively. The first connecting belt 330 is provided with a first magic tape 332, the second connecting belt 340 is provided with a second magic tape 342, the first magic tape 332 and the second magic tape 342 are adhered to each other, the adjusting piece 350 comprises a sliding block 354, the table top 220 is provided with a sliding groove 352, the sliding block 354 is slidably connected in the sliding groove 352, and the sliding block 354 is respectively connected with one end of the first connecting belt 330 and one end of the second connecting belt 340. Through pasting first magic subsides 332 and second magic subsides 342 each other, realize that first connecting band 330 and second connecting band 340 bind fixedly to the animal, be favorable to adjusting the position of first connecting band 330 and second connecting band 340 through setting up spout 352 and slider 354 to be favorable to improving and bind fixed effect.

The working principle of the lifting type animal experiment table is as follows: when the adjustable height adjusting device is used, the motor 130 is started to drive the shaft rod 140 and the first bevel gear 150 to rotate, the first bevel gear 150 is meshed with the second bevel gear 170, the second bevel gear 170 drives the screw rod 160 to rotate, the threaded sleeve 182 moves relative to the screw rod 160, and therefore the position heights of the supporting plate 184 and the table top 220 are adjusted. The electric push rod 230 is activated to drive the connecting block 232 to move, so that the second rod body 214 moves relative to the first rod body 212, and the position and the height of the table-board 220 are adjusted again. The adjusting knob 246 can fix the distance between the first cylinder 242 and the second cylinder 244, and the height of the position of the illumination lamp 250 can be adjusted by changing the distance between the first cylinder 242 and the second cylinder 244, so that the illumination effect of the illumination lamp 250 can be improved, and the operation can be more facilitated. Drive plate body 326 through rotating threaded rod 310 and remove, realize plate body 326 and animal and contact, realized plate body 326 and fixed the animal each other the centre gripping, set up spring 324 and be favorable to providing the buffering, reduce the injury that plate body 326 centre gripping led to the fact the animal. Through pasting first magic subsides 332 and second magic subsides 342 each other, realize that first connecting band 330 and second connecting band 340 bind fixedly to the animal, be favorable to adjusting the position of first connecting band 330 and second connecting band 340 through setting up spout 352 and slider 354 to be favorable to improving and bind fixed effect. The experimental bench has improved present laboratory bench and is mostly for fixed setting, can not adjust according to user's height to lead to the user to operate inconveniently when experimenting, influenced the experiment effect, current laboratory bench lacks the device of fixing to the animal simultaneously when using, has also further caused the problem of influence to user's operation.

It should be noted that the specific model specifications of the motor 130, the electric push rod 230, and the lighting lamp 250 need to be determined according to the actual specification of the device, and the specific model selection calculation method adopts the prior art, so detailed description is omitted.

The power supply and the principle of the motor 130, the power push rod 230, and the illumination lamp 250 will be apparent to those skilled in the art and will not be described in detail herein.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A lifting type animal experiment table is characterized by comprising

The lifting assembly (100), the lifting assembly (100) comprises a movable base (110), a frame body (120), a motor (130), a shaft lever (140), a first bevel gear (150), a screw (160), a second bevel gear (170) and a movable plate (180), the frame body (120) is fixed at the two ends above the movable base (110), the motor (130) is fixed at one side below the frame body (120), one end of the shaft lever (140) is connected with the output end of the motor (130), the first bevel gear (150) is fixed on the shaft lever (140), one end of the screw rod (160) is rotationally connected with the upper part of the frame body (120), the second bevel gear (170) is fixed at the other end of the screw (160), the second bevel gear (170) is in meshed connection with the first bevel gear (150), two ends of the moving plate (180) are in threaded connection with the screw (160);

the lifting assembly (200) comprises an adjusting rod (210), a table top (220), an electric push rod (230), an adjusting column (240) and a lighting lamp (250), wherein the adjusting rod (210) is fixed on the upper surface of the moving plate (180), the table top (220) is fixed at the top end of the adjusting rod (210), the electric push rod (230) is fixed on one side of the adjusting rod (210), the output end of the electric push rod (230) is connected with the adjusting rod (210) in a sliding mode, the adjusting column (240) is fixed at one end above the table top (220), and the lighting lamp (250) is connected to one end of the adjusting column (240) in a rotating mode;

fixed subassembly (300), fixed subassembly (300) include threaded rod (310), buffering splint (320), first connecting band (330), second connecting band (340) and regulating part (350), threaded rod (310) threaded connection is in the top both sides of mesa (220), buffering splint (320) are fixed the one end of threaded rod (310), regulating part (350) set up on mesa (220), first connecting band (330) with second connecting band (340) respectively with regulating part (350) are connected.

2. The lift-type animal experiment table according to claim 1, wherein the movable base (110) comprises a bottom plate (112) and movable wheels (114), and the movable wheels (114) are fixed below the bottom plate (112).

3. The lifting type animal experiment table as claimed in claim 1, wherein a base plate (132) is connected below the motor (130), and one side of the base plate (132) is connected with the frame body (120).

4. The lifting type animal experiment table as claimed in claim 1, wherein the moving plate (180) comprises a threaded sleeve (182) and a supporting plate (184), the threaded sleeve (182) is sleeved on the screw (160) in a threaded manner, and two ends of the supporting plate (184) are fixedly connected with the threaded sleeve (182).

5. The lift type animal experiment table according to claim 4, wherein the adjusting rod (210) comprises a first rod body (212) and a second rod body (214), the first rod body (212) is fixed above the supporting plate (184), and the second rod body (214) is connected above the first rod body (212) in a sliding manner.

6. The lifting type animal experiment table as claimed in claim 5, wherein a connecting block (232) is fixed on the second rod body (214), and the output end of the electric push rod (230) is connected with the connecting block (232).

7. The lift type animal experiment table of claim 1, wherein the adjusting column (240) comprises a first column (242), a second column (244) and an adjusting knob (246), the first column (242) is fixed at one end above the table top (220), the second column (244) is slidably connected above the first column (242), and the adjusting knob (246) is fixed on the second column (244).

8. The lifting type animal experiment table as claimed in claim 1, wherein connecting sleeves (312) are connected to two sides above the table top (220), the threaded rod (310) is in threaded connection with the connecting sleeves (312), and a rotating hand wheel (314) is fixed to one end of the threaded rod (310).

9. The elevating animal experiment table as claimed in claim 1, wherein the buffer clamp plate (320) comprises a connecting plate (322), a spring (324) and a plate body (326), the connecting plate (322) is connected to the other end of the threaded rod (310), one end of the spring (324) is connected to the connecting plate (322), and the plate body (326) is connected to the other end of the spring (324).

10. The lifting type animal experiment table as claimed in claim 1, wherein a first magic tape (332) is disposed on the first connecting belt (330), a second magic tape (342) is disposed on the second connecting belt (340), the first magic tape (332) and the second magic tape (342) are adhered to each other, the adjusting member (350) comprises a sliding block (354), a sliding groove (352) is disposed on the table top (220), the sliding block (354) is slidably connected in the sliding groove (352), and the sliding block (354) is connected to one end of the first connecting belt (330) and one end of the second connecting belt (340).