CN210696530U

CN210696530U - Can hide chinese teaching podium of graphoscope

Info

Publication number: CN210696530U
Application number: CN201921299359.8U
Authority: CN
Inventors: 李玮
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-06-09
Anticipated expiration: 2029-08-12

Abstract

The utility model discloses a can hide chinese teaching podium of graphoscope, include the base, place the district and place the platform, place the district and set up in the top position of base and pass through screw fixed connection with the base, place the platform set up in the top position of placing the district and pass through screw fixed connection with placing the district, place the district and place the platform inboard and be the fretwork form, and place the district and place a intercommunication, control the lift of display through simple machinery, the cost is lower, can satisfy a large amount of purchases of the limited school of fund, and the desktop board passes through the motor control and removes, has improved work efficiency greatly, and easy operation.

Description

Can hide chinese teaching podium of graphoscope

Technical Field

The utility model relates to a teaching podium technical field specifically says to a can hide chinese teaching podium of computer display.

Background

The multifunctional platform is also called a multimedia platform and is a product integrating the platform and a computer; the multifunctional platform adopts the principle of human engineering, and meets the teaching requirements of teachers; besides the function of a common platform, a computer is integrated in the platform, a display is arranged on the desktop of the platform, and the platform adopts a brand-new integrated integral design, so that the appearance of the multifunctional platform is neat and attractive, and the operation of teachers is simple, convenient and safe in the application process.

However, analysis shows that the existing teaching platform controls the lifting of a computer display through a complex system, the manufacturing cost is high, a large number of purchases of schools with limited funds cannot be met, and the desktop plate is generally manually moved by people and is complex to operate.

SUMMERY OF THE UTILITY MODEL

Therefore, in order to solve the above-mentioned not enough, the utility model provides a can hide chinese teaching podium of computer display herein, control the lift of display through simple machinery, the cost is lower, can satisfy a large amount of purchases of limited school of fund, and the desktop board passes through the motor control and removes, has improved work efficiency greatly, and easy operation.

The utility model discloses a realize like this, construct a chinese teaching podium that can hide computer display, including the base, place the district and place the platform, place the district and set up in the top position of base and pass through screw fixed connection with the base, place the platform set up in the top position of placing the district and with place the district through screw fixed connection, place the district and place the inboard fretwork form that is of platform, and place the district and place the platform intercommunication.

Furthermore, the placing area comprises a box cover, a Z-shaped connecting rod and a telescopic mechanism, the Z-shaped connecting rod penetrates through one side of the placing area and keeps rotating with the placing area, heat dissipation ports are formed in the periphery of the placing area, the box cover is arranged on one side of the placing area and is hinged with the placing area, and the telescopic mechanism is installed at the edge of the bottom of the inner side of the placing area; make telescopic machanism rise, descend through rotating Z type connecting rod, make the display hide through telescopic machanism, make the host computer put into through the case lid and place the district, dispel the heat to the host computer through the thermovent, prevent that the too high influence of host computer temperature from using to go up and down of control display through simple machinery.

Further, the telescopic mechanism comprises a supporting seat, a supporting plate, a placing table, a screw rod, a rotating shaft and a threaded sleeve, wherein the supporting seat is arranged at the edge position of the inner side bottom of the placing area and welded with the placing area, a supporting table is arranged at the top of the supporting seat and fixedly connected with the supporting seat through screws, the bottom of the supporting plate is provided with a supporting table which is parallel to the supporting table and has the same size as the supporting table, two ends of the top of the supporting table connected with the supporting seat are respectively provided with a connecting rod A with the same size and are rotatably connected with the supporting table through bearings, two ends of the supporting table connected with the supporting plate are respectively provided with a connecting rod B with the same size and are rotatably connected with the supporting table through bearings, the rotating shaft penetrates through one end of the connecting rod A and one end of the connecting rod B, the connecting rod A and the connecting rod B are rotatably, one end of the screw rod is welded with the Z-shaped connecting rod, and the object placing table is arranged at the center of the top of the supporting plate and is fixedly connected with the supporting plate through screws; put the thing platform and placed the display, make it drive the screw rod and rotate in the thread bush inboard through clockwise rotation Z type connecting rod, make two the same thread bushes drive the axis of rotation and constantly be close to along the screw rod, connecting rod A and connecting rod B change along with the position of axis of rotation simultaneously, make connecting rod A and connecting rod B rotate, connecting rod A and connecting rod B move up, the supporting bench with the supporting seat connection supports it, the effect of brace table through-force that is connected with the backup pad moves up along with connecting rod B, drive the backup pad and move up simultaneously, put the thing platform with backup pad fixed connection and also follow up the removal, thereby control the lift of display through simple machinery, the cost is lower, can satisfy the limited a large amount of purchases of school of fund.

Further, the placing table comprises a drawer, a blocking plate and a sliding mechanism, the drawer is nested and arranged on one side of the placing table and keeps sliding with the placing table, the sliding mechanism is nested and arranged at one end of the top of the placing table and keeps sliding with the placing table, and the blocking plate is arranged at the edge position of the top of the placing table and is fixedly connected with the placing table through screws; the keyboard is stored through the drawer that sets up, blocks through blocking the version to the object of placing the bench top, prevents to place the object of bench top and falls to the ground, influences its use, makes through sliding mechanism and places the bench top and form an opening, and the display stretches out from placing bench top opening, and the size of the supporting plate is the same with the opening of placing bench top formation in addition to work efficiency has been improved greatly, and easy operation.

Further, the sliding mechanism comprises a fixed plate, a motor, a rolling shaft, a gear, a limiting block, an arc gear, a movable plate, a fixed rod, a movable groove A, a connecting plate, an arc connecting plate, a movable rod, a movable groove B and a sliding plate, wherein the fixed plate is arranged on one side inside the placing table and fixedly connected with the placing table through screws, the motor is embedded in the side surface of the fixed plate, the rolling shaft penetrates through the gear and the movable plate and is connected to a motor shaft of the motor, the gear rotates along with the rolling shaft, the movable plate is rotatably connected with the rolling shaft through a bearing, the limiting block is arranged on the outer edge of the gear and is integrally formed with the gear, the arc gear is arranged at one end of the arc connecting plate and is fixedly connected with the arc connecting plate through screws, the gear is meshed with the arc gear and, the other end of the arc-shaped connecting plate is fixedly connected with the movable rod through a screw, one end of the fixed rod is fixedly connected to one side of the fixed plate through a screw, the other end of the fixed rod is fixedly connected to one side of the interior of the placing table through a screw, the movable groove A is hollowed out and arranged on the inner side of the fixed rod, the movable rod is fixedly connected with the sliding plate through a screw, the movable groove B is hollowed out and arranged on the inner side of the movable rod, rolling bearings with the same size are arranged at two ends of the connecting plate respectively, the two rolling bearings with the same size are respectively movable in the movable groove A and the movable groove B, one end of; the motor is controlled to rotate clockwise to drive the rolling shaft to rotate, meanwhile, the gear connected with the rolling shaft also rotates along with the rolling shaft to drive the arc gear meshed with the rolling shaft to rotate, meanwhile, the arc connecting plate integrally formed with the arc gear rotates along with the rotation of the arc connecting plate, the rolling bearings at the two ends of the connecting plate move in the movable groove A and the movable groove B, the arc connecting plate and the movable plate also rotate through the bearings, the movable plate moves along the bottom direction of the placing area to change the positions at the two ends of the arc connecting plate and drive the movable rod connected with one end of the movable rod to move towards one side of the placing table, meanwhile, the sliding plate fixedly connected with the movable rod also moves along with the movable rod towards one side of the placing table, finally, an opening is formed at the top of the placing table, the display extends out of the opening at the top of the placing table, the motor is a Y, the working efficiency is greatly improved, and the operation is simple.

The utility model discloses an improve and provide a can hide computer display's chinese teaching podium here, compare with the current chinese teaching podium that can hide computer display, have following advantage: control the lift of display through simple machinery, the cost is lower, can satisfy the limited a large amount of purchases of school of fund, and the desktop board passes through motor control and removes, has improved work efficiency greatly, and easy operation, and the concrete embodiment is:

the method has the advantages that: make it drive the screw rod and rotate inboard at the thread bush through clockwise rotation Z type connecting rod, make two the same thread bushes drive the axis of rotation and constantly be close to along the screw rod, connecting rod A and connecting rod B change along with the position of axis of rotation simultaneously, make connecting rod A and connecting rod B rotate, connecting rod A and connecting rod B move up, the supporting bench with the supporting seat connection supports it, the effect of brace table through-force that is connected with the backup pad moves up along with connecting rod B, drive the backup pad and move up simultaneously, it also follows up the removal with backup pad fixed connection's thing platform of putting.

The method has the advantages that: rotate clockwise through the control motor and drive the roll axis and rotate, the gear of being connected with the roll axis simultaneously also follows the rotation, drive the arc gear rotation rather than meshing, simultaneously with arc gear integrated into one piece's arc connecting plate along with rotating, the antifriction bearing at connecting plate both ends removes in activity groove A and activity groove B this moment, the arc connecting plate also passes through the bearing rotation with the fly leaf, the fly leaf removes along placing district bottom direction, make the position at arc connecting plate both ends change, the movable rod that drives to be connected rather than one end removes toward one side of placing the platform, the sliding plate with movable rod fixed connection also removes along with the movable rod toward one side of placing the platform simultaneously, finally make and place the bench top and form an opening, the display stretches out from the open-top of placing the platform, the motor is the Y series alternating current motor that has the reduction gear.

The method has the advantages that: the keyboard is stored through the drawer, the object on the top of the placing table is blocked through the blocking plate, the object on the top of the placing table is prevented from falling to the ground and affecting use of the object, the top of the placing table forms an opening through the sliding mechanism, and the display stretches out of the opening on the top of the placing table.

Drawings

FIG. 1 is a schematic view of a Chinese teaching platform with a computer monitor capable of being hidden according to the present invention;

FIG. 2 is a schematic view of a local structure of a telescoping mechanism of a Chinese teaching platform capable of hiding a computer monitor according to the present invention;

FIG. 3 is a longitudinal section of the sliding mechanism of the Chinese teaching platform with the computer monitor hidden according to the present invention;

FIG. 4 is a longitudinal section of the telescopic mechanism of the Chinese teaching platform with the computer monitor hidden according to the present invention;

fig. 5 is a schematic view of the local structure of the thread cover of the Chinese teaching platform of the computer monitor capable of being hidden.

Sequence numbers shown in the figures: the base 1, the placing area 2, the box cover 21, the heat dissipation opening 22, the Z-shaped link 23, the telescopic mechanism 24, the supporting base 241, the supporting plate 242, the object placing table 243, the link a244, the link B245, the screw 246, the supporting table 247, the rotating shaft 248, the thread bushing 249, the placing table 3, the drawer 31, the blocking plate 32, the sliding mechanism 33, the fixing plate 331, the motor 332, the gear 333, the rolling shaft 334, the limiting block 335, the arc-shaped gear 336, the movable plate 337, the fixing rod 338, the movable groove a339, the connecting plate 3310, the arc-shaped connecting plate 3311, the movable rod 3312, the movable groove B3313, the sliding plate 3314, and the rolling.

Detailed Description

The present invention will be described in detail below with reference to the attached drawings, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention; furthermore, the terms "first," "second," "third," "upper, lower, left, right," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Meanwhile, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model provides a language teaching platform capable of hiding a computer display through improvement, as shown in the attached drawing of the specification, the language teaching platform can be implemented as follows; including base 1, place district 2 and place platform 3, place district 2 and set up in the top position of base 1 and pass through screw fixed connection with base 1, place platform 3 set up in the top position of placing district 2 and with place district 2 through screw fixed connection, place district 2 and place 3 inboards of platform and be the fretwork form, and place district 2 and place 3 intercommunications of platform.

In the utility model, the placing area 2 comprises a box cover 21, a Z-shaped connecting rod 23 and a telescopic mechanism 24, the Z-shaped connecting rod 23 is arranged on one side of the placing area 2 in a penetrating way and keeps rotating with the placing area 2, the periphery of the placing area 2 is provided with a heat dissipation opening 22, the box cover 21 is arranged on one side of the placing area 2 and is hinged with the placing area 2, and the telescopic mechanism 24 is arranged at the edge position of the bottom inside the placing area 2; the telescopic mechanism 24 is enabled to ascend and descend by rotating the Z-shaped connecting rod 23, the display is hidden by the telescopic mechanism 24, the host is placed into the placing area 2 through the box cover 21, the host is cooled through the cooling port 22, and the use is prevented from being influenced by overhigh temperature of the host.

The telescopic mechanism 24 comprises a supporting base 241, a supporting plate 242, a placing table 243, a screw rod 246, a rotating shaft 248 and a threaded sleeve 249, wherein the supporting base 241 is arranged at the edge position of the inner bottom of the placing area 2 and is welded with the placing area 2, a supporting table 247 is arranged at the top of the supporting base 241 and is fixedly connected with the supporting base 241 through screws, a supporting table 247 parallel to the supporting table 247 and with the same size is arranged at the bottom of the supporting plate 242, connecting rods A244 with the same size are arranged at two ends of the top of the supporting table 247 connected with the supporting base 241 and are rotatably connected with the supporting table 247 through bearings, connecting rods B245 with the same size are arranged at two ends of the supporting table 247 connected with the supporting base 242 and are rotatably connected with the supporting table 247 through bearings, the rotating shaft 248 is arranged at one end of the connecting rods A244 and B245 in a penetrating manner, the connecting rods A244 and B245 are rotatably connected, the screw 246 is nested inside the threaded sleeve 249 and is movably connected with the threaded sleeve 249, one end of the screw 246 is welded with the Z-shaped connecting rod 23, and the object placing table 243 is arranged at the center of the top of the supporting plate 242 and is fixedly connected with the supporting plate 242 through screws; the display is placed on the object placing table 243, the Z-shaped connecting rod 23 is rotated clockwise to drive the screw rod 246 to rotate inside the threaded sleeve 249, two identical threaded sleeves 249 drive the rotating shaft 248 to continuously approach along the screw rod 246, meanwhile, the positions of the connecting rods A244 and B245 along with the rotating shaft 248 change, the connecting rods A244 and B245 are rotated, the connecting rods A244 and B245 move upwards, the supporting table 247 connected with the supporting seat 241 supports the supporting rod, the supporting table 247 connected with the supporting plate 242 moves upwards along with the connecting rod B245 under the action of force, the supporting plate 242 is driven to move upwards at the same time, and the object placing table 243 fixedly connected with the supporting plate 242 also moves upwards along with the object placing table 243.

The placing table 3 comprises a drawer 31, a blocking plate 32 and a sliding mechanism 33, the drawer 31 is nested and arranged on one side of the placing table 3 and keeps sliding with the placing table 3, the sliding mechanism 33 is nested and arranged on one end of the top of the placing table 3 and keeps sliding with the placing table 3, and the blocking plate 32 is arranged at the edge position of the top of the placing table 3 and is fixedly connected with the placing table 3 through screws; the keyboard is stored through the arranged drawer 31, the object on the top of the placing table 3 is blocked through the blocking plate 32, the object on the top of the placing table 3 is prevented from falling to the ground and affecting the use of the object, the opening is formed on the top of the placing table 3 through the sliding mechanism 33, the display extends out of the opening on the top of the placing table 3, and in addition, the size of the supporting plate 242 is the same as that of the opening formed on the top of the placing table 3.

The sliding mechanism 33 includes a fixed plate 331, a motor 332, a rolling shaft 334, a gear 333, a limit block 335, an arc gear 336, a movable plate 337, a fixed rod 338, a movable slot a339, a connecting plate 3310, an arc connecting plate 3311, a movable rod 3312, a movable slot B3313 and a sliding plate 3314, the fixed plate 331 is disposed at one side of the interior of the placing table 3 and fixedly connected with the placing table 3 through screws, the motor 332 is embedded in the side surface of the fixed plate 331, the rolling shaft 334 penetrates through the gear 333 and the movable plate 337 and is connected to the motor shaft of the motor 332, the gear 333 rotates along with the rolling shaft 334, the movable plate 337 and the rolling shaft 334 are rotatably connected through bearings, the limit block 335 is disposed at the outer edge of the gear 333 and is integrally formed with the gear 333, the arc gear 336 is disposed at one end of the arc connecting plate 3311 and fixedly connected with the arc connecting, the arc-shaped connecting plate 3311 is arranged on the side surface of the movable plate 337 and is rotationally connected with the movable plate 337 through a stud, the other end of the arc-shaped connecting plate 3311 is fixedly connected with the movable rod 3312 through a screw, one end of the fixed rod 338 is fixedly connected with one side of the fixed plate 331 through a screw, the other end of the fixed rod 338 is fixedly connected with one side of the interior of the placing table 3 through a screw, the movable groove a339 is hollowed out on the inner side of the fixed rod 338, the movable rod 3312 is fixedly connected with the sliding plate 3314 through a screw, the movable groove B3313 is hollowed out on the inner side of the movable rod 3312, the two ends of the connecting plate 3310 are respectively provided with rolling bearings 3315 with the same size, the two rolling bearings 3315 with the same size are respectively movable in the movable groove a339 and the movable groove B3313; the motor 332 is controlled to rotate clockwise to drive the rolling shaft 334 to rotate, meanwhile, the gear 333 connected with the rolling shaft 334 also rotates along with the rotation to drive the arc gear 336 meshed with the rolling shaft to rotate, meanwhile, the arc connecting plate 3311 integrally formed with the arc gear 336 rotates along with the rotation, at the moment, the rolling bearings 3315 at the two ends of the connecting plate 3310 move in the movable groove A339 and the movable groove B3313, the arc connecting plate 3311 and the movable plate 337 also rotate through the bearings, the movable plate 337 moves along the bottom direction of the placing area 2 to change the positions at the two ends of the arc connecting plate 3311 to drive the movable rod 3312 connected with one end of the arc connecting plate to move towards one side of the placing table 3, meanwhile, the sliding plate 3314 fixedly connected with the movable rod 3312 also moves towards one side of the placing table 3 along with the movable rod 3312, finally, an opening is formed at the top of the placing table 3, the display extends out from the opening at the top, the slow speed of rotation can be maintained.

The working principle of the language teaching platform capable of hiding the computer display comprises the following steps: the motor 332 is a Y-series alternating current motor with a reducer, which can keep a slow rotation speed, and drives the screw 246 to rotate inside the threaded sleeve 249 by clockwise rotating the Z-shaped connecting rod 23, so that the two identical threaded sleeves 249 drive the rotating shaft 248 to continuously approach along the screw 246, and simultaneously the connecting rod a244 and the connecting rod B245 change along with the position of the rotating shaft 248, so that the connecting rod a244 and the connecting rod B245 rotate, the connecting rod a244 and the connecting rod B245 move upwards, the supporting table 247 connected with the supporting seat 241 supports the supporting seat, the supporting table 247 connected with the supporting plate 242 moves upwards along with the connecting rod B245 under the action of force, and simultaneously drives the supporting plate 242 to move upwards, the object placing table 243 fixedly connected with the supporting plate 242 also moves upwards, the rolling shaft 334 is driven to rotate by clockwise rotating the control motor 332, and the gear 333 connected with the rolling shaft 334 also rotates, and drives the arc gear 336 meshed with the rolling shaft to, simultaneously with arc gear 336 integrated into one piece's arc connecting plate 3311 along with rotating, the antifriction bearing 3315 at connecting plate 3310 both ends this moment removes in activity groove A339 and activity groove B3313, arc connecting plate 3311 also rotates through the bearing with fly leaf 337, fly leaf 337 removes along placing 2 bottom directions in district, the position that makes arc connecting plate 3311 both ends changes, the movable rod 3312 that drives to be connected rather than one end is toward placing one side of platform 3 and is removed, simultaneously with movable rod 3312 fixed connection's sliding plate 3314 also along with movable rod 3312 toward placing one side of platform 3 and remove, the final messenger places 3 tops of platforms and forms an opening, the display stretches out from placing the top opening of platform 3.

In conclusion; the utility model discloses can hide computer display's chinese teaching podium compares with current can hide computer display's chinese teaching podium, controls the lift of display through simple machinery, and the cost is lower, can satisfy a large amount of purchases of the limited school of fund, and the desktop board passes through the electric machine control and removes, has improved work efficiency greatly, and easy operation.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides a can hide chinese teaching podium of computer display, includes base (1), places district (2) and places platform (3), its characterized in that: place district (2) and set up in the top position of base (1) and pass through screw fixed connection with base (1), place platform (3) set up in the top position of placing district (2) and pass through screw fixed connection with placing district (2), place district (2) and place platform (3) inboard and be the fretwork form, and place district (2) and place platform (3) intercommunication.

2. The language teaching podium capable of hiding a computer display as claimed in claim 1, wherein: place district (2) including case lid (21), Z type connecting rod (23) and telescopic machanism (24), Z type connecting rod (23) run through set up in the one side of placing district (2) and keep rotating with placing district (2), it is equipped with thermovent (22) all around to place district (2), case lid (21) set up in the one side of placing district (2) and with place district (2) articulated, telescopic machanism (24) are installed in placing district (2) inboard bottom border position.

3. The language teaching podium capable of hiding a computer display as claimed in claim 2, wherein: the telescopic mechanism (24) comprises a supporting seat (241), a supporting plate (242), an object placing table (243), a screw rod (246), a rotating shaft (248) and a threaded sleeve (249), wherein the supporting seat (241) is arranged at the edge position of the inner bottom of the object placing area (2) and welded with the object placing area (2), a supporting table (247) is arranged at the top of the supporting seat (241) and fixedly connected with the supporting seat (241) through screws, the supporting table (247) which is parallel to the supporting table (247) and has the same size is arranged at the bottom of the supporting plate (242), connecting rods A (244) with the same size are arranged at two ends of the top of the supporting table (247) connected with the supporting seat (241) and are rotatably connected with the supporting table (247) through bearings, and connecting rods B (245) with the same size are arranged at two ends of the supporting table (247) connected with the supporting plate (242) and are rotatably connected, the rotating shaft (248) is arranged at one end of the connecting rod A (244) and one end of the connecting rod B (245) in a penetrating mode, the connecting rod A (244) and the connecting rod B (245) are connected in a rotating mode through the rotating shaft (248), the threaded sleeve (249) is arranged in the middle of the rotating shaft (248) in a penetrating mode and is integrally formed with the rotating shaft (248), the screw rod (246) is nested on the inner side of the threaded sleeve (249) and is movably connected with the threaded sleeve (249), one end of the screw rod (246) is welded with the Z-shaped connecting rod (23), and the placing table (243) is arranged at the center of the top of the supporting plate (242) and is fixedly connected with the supporting plate (242) through screws.

4. The language teaching podium capable of hiding a computer display as claimed in claim 1, wherein: the placing table (3) comprises a drawer (31), a blocking plate (32) and a sliding mechanism (33), the drawer (31) is nested and arranged on one side of the placing table (3) and keeps sliding with the placing table (3), the sliding mechanism (33) is nested and arranged at one end of the top of the placing table (3) and keeps sliding with the placing table (3), and the blocking plate (32) is arranged at the edge position of the top of the placing table (3) and is fixedly connected with the placing table (3) through screws.

5. The language teaching podium of claim 4 wherein said computer display is hidden: the sliding mechanism (33) comprises a fixed plate (331), a motor (332), a rolling shaft (334), a gear (333), a limiting block (335), an arc-shaped gear (336), a movable plate (337), a fixed rod (338), a movable groove A (339), a connecting plate (3310), an arc-shaped connecting plate (3311), a movable rod (3312), a movable groove B (3313) and a sliding plate (3314), wherein the fixed plate (331) is arranged on one side inside the placing table (3) and fixedly connected with the placing table (3) through screws, the motor (332) is embedded in the side surface of the fixed plate (331), the rolling shaft (334) penetrates through the gear (333) and the movable plate (337) and is connected to a motor shaft of the motor (332), the gear (333) rotates along with the rolling shaft (334), the movable plate (337) and the rolling shaft (334) are rotatably connected through bearings, the limiting block (335) is arranged on the outer side edge of the gear (333) and integrally formed with the gear, the arc-shaped gear (336) is arranged at one end of an arc-shaped connecting plate (3311) and is fixedly connected with the arc-shaped connecting plate (3311) through screws, the gear (333) is meshed with the arc-shaped gear (336) and keeps rotationally connected with the arc-shaped connecting plate, the arc-shaped connecting plate (3311) is arranged at the side surface of the movable plate (337) and keeps rotationally connected with the movable plate (337) through a stud, the other end of the arc-shaped connecting plate (3311) is fixedly connected with the movable rod (3312) through screws, one end of the fixed rod (338) is fixedly connected with one side of the fixed plate (331) through screws, the other end of the fixed rod (338) is fixedly connected with one side of the interior of the placing table (3) through screws, the movable groove A (339) is arranged at the inner side of the fixed rod (338), the movable rod (3312) is fixedly connected with the sliding plate (3314) through screws, connecting plate (3310) both ends all are equipped with the same antifriction bearing of size (3315), two the same size antifriction bearing (3315) move about respectively in activity groove A (339) and activity groove B (3313), connecting plate (3310) one end is passed through the screw rod and is kept rotating with movable rod (3312) and be connected, connecting plate (3310) other end is passed through the screw rod and is kept rotating with dead lever (338) and be connected.