CN110203121B

CN110203121B - Bacterin transports case

Info

Publication number: CN110203121B
Application number: CN201910398104.5A
Authority: CN
Inventors: 丁自立
Original assignee: Zhejiang Maizhi Network Technology Co ltd
Current assignee: Jiaxing Zhuoshi Biotechnology Co ltd
Priority date: 2019-05-14
Filing date: 2019-05-14
Publication date: 2021-01-15
Anticipated expiration: 2039-05-14
Also published as: CN110203121A

Abstract

The invention provides a vaccine conveying box which comprises a vehicle body and a first sliding cavity, wherein the first sliding cavity is arranged in the right side end wall of the vehicle body and provided with a right opening, a lifting device is arranged in the first sliding cavity and comprises a first sliding block which is arranged in the first sliding cavity in a sliding manner, a second sliding cavity with a right opening is arranged in the first sliding block, a second sliding block is arranged in the second sliding cavity in a sliding manner, an upward moving device is arranged in the second sliding block, and a first transmission cavity is arranged in the second sliding block; the vaccine conveying device is more reasonable and ingenious in overall structure and very convenient to use, the same power source can be used for driving the device to move and move upwards, the automation degree is high, the lifting height can be adjusted, meanwhile, the supporting device is arranged below the storage box, the vaccine box is supported, the storage and transportation safety is improved, and the vaccine conveying device is high in practicability and safety and has high use and popularization values.

Description

Bacterin transports case

Technical Field

The invention relates to the field of vaccine storage and transportation, in particular to a vaccine transportation box.

Background

People often have this problem in the bacterin transportation process of storing, traditional warehousing and transportation equipment often need cooperate the tray practical, just so can't transport the bacterin that does not set up the tray, traditional lifting device is bulky, and the expense is higher, is unsuitable for some bacterin transports.

Some clamping transportation devices for vaccines exist at present, but the devices are often damaged by threatened goods due to the fact that transportation personnel are not clamped firmly.

Therefore, there is a need for further improvement of the prior art vaccine delivery device, so as to improve the efficiency and safety of the vaccine delivery device.

Disclosure of Invention

The invention aims to provide a vaccine delivery box which can overcome the defects in the prior art and improve the efficiency and safety of equipment.

The vaccine conveying box comprises a vehicle body and a first sliding cavity which is arranged in the right side end wall of the vehicle body and is provided with a right opening, wherein a lifting device is arranged in the first sliding cavity, the lifting device comprises a first sliding block which is arranged in the first sliding cavity in a sliding manner, a second sliding cavity which is arranged in the first sliding block and is provided with a right opening, a second sliding block is arranged in the second sliding cavity in a sliding manner, an upward moving device is arranged in the second sliding block, a first transmission cavity is arranged in the second sliding block, third sliding cavities which are arranged at the front side and the rear side of the first transmission cavity are symmetrically arranged in the right side end wall of the second sliding block, a clamping device is arranged in each third sliding cavity, a second transmission cavity is arranged in the bottom wall of each second sliding cavity, a supporting device is arranged in each second transmission cavity, and a third transmission cavity is arranged in the bottom wall of each, the power switching device is characterized in that a fourth sliding cavity with an upward opening is arranged in the bottom wall of the third transmission cavity, a power switching device is arranged in the fourth sliding cavity, a fourth transmission cavity located below the third transmission cavity is arranged in the end wall of the left side of the fourth sliding cavity, and a moving device is arranged in the fourth transmission cavity.

The ascending device comprises a through hole which is formed in the upper end wall and the lower end wall of the first sliding block and penetrates through the first sliding block, the ascending device comprises a first threaded hole which is formed in the second sliding block and penetrates through the second sliding block from top to bottom, a first threaded rod which extends from top to bottom is connected with the first threaded hole in a thread fit mode, the top end of the first threaded rod rotates and is arranged in the top wall of the first sliding cavity, the bottom end of the first threaded rod penetrates through the bottom wall of the first sliding cavity and extends to the bottom wall of the third sliding cavity, and a first gear is fixedly arranged at the tail end.

Wherein, the clamping device comprises a spline housing which is rotatably arranged between the upper end wall and the lower end wall of the first transmission cavity, a first bevel gear is fixedly arranged on the outer surface of the spline housing in the first transmission cavity, a spline hole which is communicated up and down is arranged in the spline housing, a spline shaft which is extended up and down is connected in the spline hole in a spline fit way, the tail end of the top part of the spline shaft is rotatably arranged in the top wall of the second sliding cavity, the tail end of the bottom part of the spline shaft penetrates through the bottom wall of the second sliding cavity and extends into the second transmission cavity, a second bevel gear is fixedly arranged at the tail end, a third sliding block is slidably arranged in the third sliding cavity, a second threaded hole which is communicated back and forth is arranged in the third sliding cavity, a second threaded rod which is connected in a threaded fit way and extends back and forth is arranged in the outer end wall of, the second threaded rod is close to the tail end of one side of the first transmission cavity and penetrates through the end wall of the first transmission cavity to extend into the first transmission cavity, and a third bevel gear meshed with the first bevel gear is fixedly mounted at the tail end of the first transmission cavity.

Preferably, the supporting device includes a first motor fixedly installed in the front end wall of the second transmission cavity, a fourth bevel gear engaged with the second bevel gear is fixedly installed at the backward extending end of the output shaft of the first motor, a first rotating shaft is rotatably arranged in the rear end wall of the second transmission cavity, a sector gear is fixedly installed on the outer surface of the first rotating shaft, the first rotating shaft is connected with the output shaft of the first motor through a ratchet wheel, a first sliding hole communicated with the outside is formed in the right end wall of the second transmission cavity, a rack matched with the sector gear is slidably arranged in the first sliding hole, and an elastic resetting device is elastically arranged between the rack and the bottom wall of the first sliding hole.

Preferably, the mobile device includes running through of end wall internal rotation setting around the automobile body the second pivot in fourth transmission chamber, the terminal fixed mounting in both sides has the drive wheel around the second pivot, in the fourth transmission chamber second pivot surface fixed mounting has the turbine, rotate between the end wall about the fourth transmission chamber be provided with turbine meshing's scroll bar, both sides rotate about the scroll bar set up with in the end wall about the fourth transmission chamber, the scroll bar top is terminal to be run through fourth transmission chamber roof stretches into third transmission chamber and terminal fixed mounting has the second gear, fixed mounting has the directive wheel that is located on drive wheel right side on the end wall around the automobile body.

Preferably, the power switching device includes a fourth sliding block capable of sliding left and right and arranged in a fourth sliding cavity, a second motor is fixedly arranged in a top wall of the fourth sliding block, an output shaft of the second motor extends upwards, a tail end of the output shaft of the second motor is fixedly arranged with a third gear meshed with the second gear, a second sliding hole with a left opening is arranged in a right end wall of the fourth sliding cavity, a sliding rod fixedly connected with the fourth sliding block is slidably arranged in the second sliding hole, a permanent magnet is fixedly arranged on the right end wall of the sliding rod, an electromagnet matched with the permanent magnet is fixedly arranged on the right end wall of the second sliding hole, and a jacking spring is elastically arranged between the electromagnet and the permanent magnet.

The invention has the beneficial effects that: the vaccine conveying device is more reasonable and ingenious in overall structure and very convenient to use, the same power source can be used for driving the device to move and move upwards, the automation degree is high, the lifting height can be adjusted, meanwhile, the supporting device is arranged below the storage box, the vaccine box is supported, the storage and transportation safety is improved, and the vaccine conveying device is high in practicability and safety and has high use and popularization values.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic view showing the overall structure of a vaccine delivery box according to the present invention.

FIG. 2 is a schematic of the structure of A-A in FIG. 1.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

In the description of the present invention, 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", etc., indicate orientations or positional relationships based on those shown in fig. 1, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.

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

As shown in fig. 1-2, the vaccine delivery box of the present invention comprises a vehicle body 100 and a first sliding cavity 101 with a right opening disposed in a right side end wall of the vehicle body 100, wherein a lifting device is disposed in the first sliding cavity 101, the lifting device comprises a first sliding block 104 slidably disposed in the first sliding cavity 101, a second sliding cavity 105 with a right opening is disposed in the first sliding block 104, a second sliding block 106 is slidably disposed in the second sliding cavity 105, an upward moving device is disposed in the second sliding block 106, a first transmission cavity 134 is disposed in the second sliding block 106, third sliding cavities 145 disposed in front and rear sides of the first transmission cavity 134 are symmetrically disposed in a right side end wall of the second sliding block 106, a clamping device is disposed in the third sliding cavities 145, and a second transmission cavity 141 is disposed in a bottom wall of the second sliding cavity 106, a supporting device is arranged in the second transmission cavity 141, a third transmission cavity 119 is arranged in the bottom wall of the first sliding cavity 101, a fourth sliding cavity 118 with an upward opening is arranged in the bottom wall of the third transmission cavity 119, a power switching device is arranged in the fourth sliding cavity 118, a fourth transmission cavity 113 located below the third transmission cavity 119 is arranged in the end wall of the left side of the fourth sliding cavity 118, and a moving device is arranged in the fourth transmission cavity 113.

Next, the specific structure of the ascending device and the upward moving device thereof of the present application will be described in detail with reference to fig. 1-2, wherein the ascending device includes a through hole 103 disposed in the upper and lower end walls of the first sliding block 104 and penetrating through the first sliding block 104, the upward moving device includes a first threaded hole 107 disposed in the second sliding block 107 and penetrating up and down, the first threaded hole 107 is connected with a first threaded rod 102 extending up and down in a threaded fit manner, the top end of the first threaded rod 102 is rotatably disposed in the top wall of the first sliding cavity 101, the bottom end of the first threaded rod 102 penetrates through the bottom wall of the first sliding cavity 104 and extends into the third transmission cavity 119, and the bottom end is fixedly mounted with a first gear 108.

Next, the specific structure of the clamping device of the present application will be described in detail with reference to fig. 1, the clamping device includes a spline housing 131 rotatably disposed between the upper and lower end walls of the first transmission cavity 134, a first bevel gear 132 is fixedly mounted on the outer surface of the spline housing 131 in the first transmission cavity 134, a spline hole 131 vertically penetrating is disposed in the spline housing 131, a spline shaft 129 vertically extending is spline-coupled in the spline hole 131, the top end of the spline shaft 129 is rotatably disposed in the top wall of the second sliding cavity 106, the bottom end of the spline shaft 129 penetrates the bottom wall of the second sliding cavity 106 and extends into the second transmission cavity 141, a second bevel gear 140 is fixedly mounted at the end, a third sliding block 144 is slidably disposed in the third sliding cavity 145, a second threaded hole 143 longitudinally penetrating is disposed in the third sliding block 144, and a second threaded rod 142 longitudinally extending is threadedly engaged in the second threaded hole 143, the end of one side of the second threaded rod 142, which is far away from the first transmission cavity 134, is rotatably arranged in the end wall of the outer side of the third sliding cavity 144, the end of one side of the second threaded rod 142, which is close to the first transmission cavity 134, penetrates through the end wall of the first transmission cavity 134 and extends into the first transmission cavity 134, and the end of the second threaded rod 142 is fixedly provided with a third bevel gear 133 engaged with the first bevel gear 132.

Advantageously, as shown in fig. 1-2, the supporting device includes a first motor 135 fixedly installed in a front end wall of the second transmission cavity 141, an output shaft of the first motor 135 is fixedly installed at a backward extending end thereof with a fourth bevel gear 136 engaged with the second bevel gear 140, a first rotating shaft 139 is rotatably disposed in a rear end wall of the second transmission cavity 141, a sector gear 138 is fixedly installed on an outer surface of the first rotating shaft 139, the first rotating shaft 139 is connected with the output shaft of the first motor 135 by a ratchet gear 137, a first sliding hole 128 communicated with the outside is disposed in a right end wall of the second transmission cavity 141, a rack 127 engaged with the sector gear 138 is slidably disposed in the first sliding hole 128, and an elastic return device 126 is elastically disposed between the rack 127 and a bottom wall of the first sliding hole 128.

Advantageously, as shown in fig. 1-2, the moving device includes a second rotating shaft 112 rotatably disposed on the front and rear end walls of the vehicle body 100 and penetrating through the fourth transmission cavity 113, driving wheels 114 are fixedly mounted at the front and rear ends of the second rotating shaft 112, a turbine 111 is fixedly mounted on the outer surface of the second rotating shaft 112 in the fourth transmission cavity 113, a worm 115 engaged with the turbine 111 is rotatably disposed between the upper and lower end walls of the fourth transmission cavity 113, the upper and lower ends of the worm 115 are rotatably disposed in the upper and lower end walls of the fourth transmission cavity 113, the top end of the worm 115 penetrates through the top wall of the fourth transmission cavity 113 and extends into the third transmission cavity 119, and the end of the worm 115 is fixedly mounted with the second gear 110, and a steering wheel 123 located on the right side of the driving wheel 114 is fixedly mounted on the front and rear end walls of the vehicle body 100.

Advantageously, as shown in fig. 1-2, the power switching device includes a fourth sliding block 117 disposed in the fourth sliding cavity 118 and capable of sliding left and right, a second motor 116 is fixedly mounted in a top wall of the fourth sliding block 117, a third gear 109 engaged with the second gear 110 is fixedly mounted at an upwardly extending end of an output shaft of the second motor 116, a second sliding hole 125 with a leftward opening is disposed in a right end wall of the fourth sliding cavity 118, a sliding rod 120 fixedly connected with the fourth sliding block 117 is slidably disposed in the second sliding hole 125, a permanent magnet 121 is fixedly mounted on a right end wall of the sliding rod 120, an electromagnet 124 matched with the permanent magnet 121 is fixedly mounted on a right end wall of the second sliding hole 125, and a pressing spring 122 is elastically disposed between the electromagnet 124 and the permanent magnet 121.

The applicant will now describe in detail the method of use of the vaccine delivery device of the present application with reference to the accompanying figures 1-2 and the specific components of the construction of the vaccine delivery device of the present application described above: first, in the initial state, the first motor 135 and the second motor 116 are in a stationary state, the fourth slide block 117 is located on the left side of the fourth slide cavity 118, the third gear 109 is engaged with the second gear 110, and the third gear 109 is disengaged from the first gear 108.

When the device works, the second motor 116 is started to rotate, the second motor 116 rotates to drive the third gear 109 to rotate, the third gear 109 rotates to drive the second gear 110 to rotate, the second gear 110 rotates to drive the worm 115 to rotate, the worm 115 rotates to drive the turbine 111 to rotate, the turbine 111 rotates to drive the second rotating shaft 112 to rotate, the second rotating shaft 112 rotates to drive the driving wheel 114 to rotate, so as to drive the vehicle body 100 to move, when the vehicle body 100 moves to drive the rack 127 to abut against a vaccine box to be transported, the rack 127 moves leftwards, when the vaccine box abuts against the right end wall of the vehicle body 100, the first motor 135 is started to rotate, so as to drive the fourth bevel gear 136 to rotate, at the moment, the first motor 135 cannot drive the ratchet wheel 137 to rotate, and the fourth bevel gear 136 rotates to drive the second bevel gear 140 to rotate, thereby driving the spline shaft 129 to rotate, the spline shaft 129 to rotate and driving the spline housing 131 to rotate, the spline housing 131 to rotate and driving the first bevel gear 132 to rotate, the first bevel gear 132 to rotate and driving the third bevel gear 133 to rotate, the third bevel gear 133 to rotate and driving the second threaded rod 142 to rotate, the second threaded rod 142 to rotate and driving the third sliding block 144 to move towards each other, the third sliding block 144 to move towards each other and firmly clamp the vaccine box, at this time, the electromagnet 124 is started to drive the permanent magnet 121 to move towards the right, at this time, the third gear 109 is separated from the second gear 110, the third gear 109 is engaged with the first gear 108, at this time, the second motor 116 rotates and driving the third gear 109 to rotate, the third gear 109 rotates and driving the first gear 108 to rotate, the first gear 108 rotates and driving the first threaded rod 102 to rotate, the first threaded rod 102 rotates to drive the second sliding block 106 to move upwards, the second sliding block 106 moves upwards to drive the vaccine box to move upwards, when the vaccine box moves upwards to the upper part of the rack 127, the rack 127 is popped up under the action of the elastic resetting device, the rack 127 is positioned below the vaccine box at the moment and plays a supporting role for the vaccine box, the electromagnet 124 is closed at the moment, the fourth sliding block 117 is reset under the action of the jacking spring 122, the third gear 109 is meshed with the second gear 110, the third gear 109 is separated from the first gear 108, the second motor 116 is started to drive the vehicle body 100 to move again at the moment, when the vaccine box moves to a position needing to be stacked, the electromagnet 124 is started to drive the permanent magnet 121 to move to the right, and the third gear 109 is separated from the second gear 110 at the moment, the third gear 109 is engaged with the first gear 108, at this time, the second motor 116 rotates to drive the first threaded rod 102 to rotate, the first threaded rod 102 rotates to drive the second sliding block 106 to move upwards, the second sliding block 106 moves upwards to drive the first sliding block 104 to move upwards, so as to drive the vaccine box to move upwards, when the vaccine box moves upwards above the stacked object, the first motor 135 is started, the first motor 135 rotates reversely to drive the fourth bevel gear 136 to rotate reversely, the fourth bevel gear 136 rotates reversely to drive the second bevel gear 140 to rotate reversely, the second bevel gear 140 rotates reversely to drive the first bevel gear 132 to rotate reversely, the first bevel gear 132 rotates reversely to drive the third bevel gear 133 rotates reversely, and the third bevel gear 133 rotates reversely to drive the second threaded rod 142 to rotate reversely, the second threaded rod 142 rotates reversely to drive the third sliding block 144 to move back and forth to release the vaccine box, meanwhile, the first motor 135 rotates reversely to drive the ratchet wheel 137 to rotate reversely, the ratchet wheel 137 rotates reversely to drive the sector gear 138 to rotate reversely, the sector gear 138 rotates to drive the rack 127 to be taken in the first sliding block 104, and at the moment, the vaccine box falls on the stacked object to finish transportation.

From the above detailed analysis it can be seen that: the equipment of the invention utilizes the same power source to drive the equipment to move and move upwards, has high automation degree, can transport vaccine boxes with different specifications, and improves the practicability of the equipment.

The vaccine box is clamped by the lifting device in the carrying process, a traditional tray forklift is not needed, and the bottom of the vaccine box is supported by the supporting device after the vaccine box is lifted, so that the falling accident caused by overweight of the vaccine is prevented, and the safety of the device is improved.

Therefore, the vaccine conveying device is more reasonable and ingenious in overall structure and very convenient to use, the same power source can be used for driving the device to move and move upwards, the automation degree is high, the lifting height can be adjusted, meanwhile, the supporting device is arranged below the storage box, the vaccine box is supported, the storage and transportation safety is improved, and the vaccine conveying device is high in practicability and safety and has high use and popularization values.

The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.

Claims

1. A vaccine delivery box comprising a body and a first slide chamber provided in a right end wall of the body and opening to the right, characterized in that: the first sliding cavity is internally provided with an ascending device, the ascending device comprises a first sliding block which is arranged in the first sliding cavity in a sliding way, the first sliding block is internally provided with a second sliding cavity with a right opening, the second sliding cavity is internally provided with a second sliding block in a sliding way, the second sliding block is internally provided with an ascending device, the second sliding block is internally provided with a first transmission cavity, the right side end wall of the second sliding block is internally and symmetrically provided with third sliding cavities which are positioned at the front side and the rear side of the first transmission cavity, the third sliding cavity is internally provided with a clamping device, the bottom wall of the second sliding cavity is internally provided with a second transmission cavity, the second transmission cavity is internally provided with a supporting device, the bottom wall of the first sliding cavity is internally provided with a third transmission cavity, the bottom wall of the third transmission cavity is internally provided with a fourth sliding cavity with an upward opening, and the fourth, a fourth transmission cavity positioned below the third transmission cavity is arranged in the left end wall of the fourth sliding cavity, and a moving device is arranged in the fourth transmission cavity; the ascending device comprises a through hole which is arranged in the upper end wall and the lower end wall of the first sliding block and penetrates through the first sliding block, the ascending device comprises a first threaded hole which is arranged in the second sliding block and penetrates through the first sliding block up and down, a first threaded rod which extends up and down is connected with the first threaded hole in a matching mode through threads, the tail end of the top of the first threaded rod is rotatably arranged in the top wall of the first sliding cavity, the tail end of the bottom wall of the first threaded rod penetrates through the bottom wall of the first sliding cavity and extends into the third transmission cavity, and a first gear is fixedly arranged at; the clamping device comprises a spline housing which is rotatably arranged between the upper end wall and the lower end wall of the first transmission cavity, a first bevel gear is fixedly arranged on the outer surface of the spline housing in the first transmission cavity, a spline hole which is communicated up and down is arranged in the spline housing, a spline shaft which is extended up and down is connected in the spline hole in a spline fit manner, the top end of the spline shaft is rotatably arranged in the top wall of the second sliding cavity, the bottom end of the spline shaft penetrates through the bottom wall of the second sliding cavity and extends into the second transmission cavity, a second bevel gear is fixedly arranged at the tail end of the second sliding cavity, a third sliding block is slidably arranged in the third sliding cavity, a second threaded hole which is communicated back and forth is arranged in the third sliding cavity, a second threaded rod which is connected in a threaded fit manner and extends back and forth is arranged in the inner side end wall of the second, the tail end of one side, close to the first transmission cavity, of the second threaded rod penetrates through the end wall of the first transmission cavity and extends into the first transmission cavity, and a third bevel gear meshed with the first bevel gear is fixedly mounted at the tail end of the second threaded rod; the supporting device comprises a first motor fixedly installed in the front side end wall of the second transmission cavity, a fourth bevel gear meshed with the second bevel gear is fixedly installed at the rear extending tail end of an output shaft of the first motor, a first rotating shaft is rotatably arranged in the rear side end wall of the second transmission cavity, a sector gear is fixedly installed on the outer surface of the first rotating shaft, the first rotating shaft is connected with the output shaft of the first motor through a ratchet wheel, a first sliding hole communicated with the outside is formed in the right side end wall of the second transmission cavity, a rack matched with the sector gear is slidably arranged in the first sliding hole, and an elastic resetting device is elastically arranged between the rack and the bottom wall of the first sliding hole; the moving device comprises a second rotating shaft which is rotatably arranged on the front end wall and the rear end wall of the vehicle body and penetrates through a fourth transmission cavity, driving wheels are fixedly arranged at the tail ends of the front side and the rear side of the second rotating shaft, a turbine is fixedly arranged on the outer surface of the second rotating shaft in the fourth transmission cavity, a worm rod meshed with the turbine is rotatably arranged between the upper end wall and the lower end wall of the fourth transmission cavity, the upper side and the lower side of the worm rod are rotatably arranged in the upper end wall and the lower end wall of the fourth transmission cavity, the tail end of the top of the worm rod penetrates through the top wall of the fourth transmission cavity and extends into the third transmission cavity, a second gear is fixedly arranged at the tail end of the top of; but power switching device includes the fourth sliding block of horizontal slip that sets up in the fourth sliding cavity, fixed mounting has the second motor in the fourth sliding block roof, second motor output shaft upwards extend terminal fixed mounting have with second gear engagement's third gear, be provided with opening second sliding hole left in the fourth sliding cavity right side end wall, slidable in the second sliding hole be provided with fourth sliding block fixed connection's slide bar, fixed mounting has the permanent magnet on the end wall of slide bar right side, fixed mounting has on the end wall of second sliding hole right side with permanent magnet complex electro-magnet, the electro-magnet with elasticity is provided with the roof pressure spring between the permanent magnet.