CN210634288U

CN210634288U - Portable seal machine with locking structure

Info

Publication number: CN210634288U
Application number: CN201920718881.9U
Authority: CN
Inventors: 赖建仁
Original assignee: Zhuhai Sigete Intelligent System Co ltd
Current assignee: Zhuhai Sigete Intelligent System Co ltd
Priority date: 2019-05-17
Filing date: 2019-05-17
Publication date: 2020-05-29
Anticipated expiration: 2029-05-17

Abstract

The utility model discloses a portable stamping machine with a locking structure, which comprises an inner shell, a stamp and a driving part, wherein the stamp is arranged inside the inner shell and is fixedly connected with the driving part, the driving part is connected with the inner shell in a sliding way, and the driving part drives the stamp to move up and down in the shell along the vertical direction; a control module, a first locking assembly and a second locking assembly which are respectively and electrically connected with the control module are arranged between the inner shell and the driving component. The utility model utilizes the first locking component to limit whether the driving component can drive the seal to move or not so as to realize the seal; the distance that the seal can slide up and down along the inner shell driven by the driving part is limited by the second locking component, and the seal can be prevented from moving out of the inner shell when sliding down in the process of stamping the seal; the utility model discloses simple structure can prevent to be stolen under the unauthorized condition of seal, also can avoid the seal to be stolen the condition of changing or being stolen simultaneously.

Description

Portable seal machine with locking structure

Technical Field

The utility model relates to a seal technical field, especially a portable seal machine with locking structure.

Background

A stamp, which is used as a stationery to be printed on a document to represent authentication or signing, is widely used in various industries such as banks, enterprises, schools and the like. As a most direct and effective legal certificate, the standard use and safe storage of the seal have great significance in various industries. In daily management work, most of the seals are locked in a safe or even a drawer of an office by managers or authorized personnel, and the seals need to be signed or stamped for use at any time.

The seal processing of many key services lacks effective supervision, and no records are used for traceability, so that illegal operations such as seal embezzlement, unauthorized seal stamping and the like are carried out by using professional convenience or other secret means, and economic crimes are carried out when a certain activity is carried out externally, and huge economic losses are often brought. Most enterprises at present adopt the seal machine to realize seal intelligent management and operation record, but most seal machines at present can not realize the function that the seal was stolen and was used by the prevention, and present automatic stamping system exists certain risk promptly, appears stealing easily, steals the condition of changing or stealing the seal, can not prevent to seal, steal the condition of changing the seal or steal the seal at unauthorized person.

Disclosure of Invention

In order to solve the technical problem, the utility model provides a portable seal machine with locking structure prevents that the seal from being stolen, stolen and traded and stolen condition.

The utility model provides a technical scheme that its technical problem adopted is: a portable stamping machine with a locking structure comprises an inner shell, a stamp and a driving component, wherein the stamp is arranged in the inner shell and fixedly connected with the driving component, the driving component is connected with the inner shell in a sliding mode, and the driving component drives the stamp to move up and down in the shell along the vertical direction; a control module, a first locking assembly and a second locking assembly which are electrically connected with the control module respectively are also arranged between the inner shell and the driving part, and the first locking assembly is used for locking the driving part and the inner shell and limiting the driving part to drive the seal to move; the second locking assembly is used for limiting the distance of the driving component sliding up and down along the inner shell.

Furthermore, the first locking assembly comprises a first electromagnet arranged in the inner shell and a locking groove arranged in the driving component, a first armature of the first electromagnet is arranged in the locking groove, and the control module controls whether the first electromagnet is electrified and is matched with the locking groove to limit the movement of the driving component; second locking subassembly including locate the inside second electro-magnet of interior casing and vertical set up in the inside bar groove of driver part, the bar inslot is arranged in to the second armature of second electro-magnet, and control module is through controlling whether the second electro-magnet has got the electricity and with bar groove cooperation restriction driver part along interior casing gliding distance from top to bottom.

Furthermore, the driving component comprises an outer shell and a connecting piece, guide rails are arranged on two sides inside the outer shell, and a sliding groove matched with the guide rails is formed in the inner shell; the outer shell is sleeved on the inner shell and slides up and down along the sliding groove; the connecting piece locate the inside of interior casing and with shell body fixed connection, the lower extreme and the seal fixed connection of connecting piece, the shell body passes through drive connecting piece and drives the seal and slide from top to bottom along the inside of interior casing, both sides still overlap respectively on the guide rail and be equipped with the guide rail cover, both sides the guide rail cover is arranged respectively in between corresponding guide rail and the spout, the locking groove is located the guide rail of one side and is sheathe in, the bar groove is located the guide rail of opposite side and is sheathe in.

Furthermore, the lower end of the connecting piece is provided with an internal thread hole matched with a threaded rod at the upper end of the stamp.

Further, the upper end in the inner shell is also provided with a cross frame, and the first electromagnet and the second electromagnet are respectively fixed on the cross frame.

Furthermore, the control module is fixed above the cross frame and fixedly connected with the inner shell.

Furthermore, the driving part also comprises a return spring, one end of the return spring is fixedly connected with the lower end of the cross frame, and the other end of the return spring is fixedly connected with the upper end of the connecting piece.

The utility model has the advantages that: the first locking component can limit whether the driving component can drive the seal to move or not so as to realize sealing; the distance that the driving component drives the seal to slide up and down along the inner shell is limited by the second locking component, and the seal can be prevented from moving out of the inner shell when sliding down in the process of stamping the seal; the utility model discloses simple structure can prevent to be stolen under the unauthorized condition of seal, also can avoid the seal to be stolen the condition of changing or being stolen simultaneously.

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic structural view of a preferred embodiment of the present invention;

fig. 2 is an exploded view of the driving member of the present invention;

fig. 3 is a schematic structural view of the inner housing of the present invention;

fig. 4 is a schematic structural view of the guide rail cover of the present invention;

FIG. 5 is a schematic diagram of the circuit schematic connection of the present invention;

fig. 6 is a schematic view of the present invention in a state where only the first locking assembly is unlocked;

fig. 7 is a schematic diagram of the first locking assembly and the second locking assembly in an unlocked state.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the conception, specific structure and technical effects of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor are within the scope of the present invention.

Referring to fig. 1 to 4, a preferred embodiment of the present invention is a portable stamping machine with a locking structure, which includes an inner housing 11, a stamp 23 and a driving member, wherein the stamp 23 is disposed inside the inner housing 11 and fixedly connected to the driving member, the driving member is slidably connected to the inner housing 11, and the driving member drives the stamp 23 to move up and down inside the housing along a vertical direction; a control module 31, a first locking component and a second locking component which are respectively electrically connected with the control module 31 are further arranged between the inner shell 11 and the driving part, and the first locking component is used for locking the driving part and the inner shell 11 and limiting the driving part to drive the stamp 23 to move; the second locking assembly is used to limit the distance that the driving member slides up and down along the inner housing 11.

The driving part is in sliding connection with the inner shell 11, namely the driving part can slide up and down along the inner shell 11, and in the process of sliding up and down, the seal 23 is driven to move up and down along the inner part of the inner shell 11; and the control module 31 controls the actions of the first locking component and the second locking component.

When the first locking component is not powered, the inner shell 11 and the driving component are locked, so that the driving component cannot slide along the inner shell 11, and only when the control module 31 powers the first locking component, the limitation of the locking component is removed, so that the inner shell 11 and the driving component are not locked any more, and the driving component can slide along the inner shell 11, so that the stamp 23 can be driven to slide up and down along the inner part of the inner shell 11;

when the first locking component is powered and the second locking component is not powered, the distance that the driving component can slide down along the inner shell 11 is limited to a certain distance, and specifically, the distance that the stamp 23 can slide down is limited by the second locking component; even if the driving member can drive only the stamp face of the stamp 23 to be kept in a position flush with the plane of the bottom opening of the inner case 11, it cannot drive the stamp face of the stamp 23 to move out of the plane of the bottom opening of the inner case 11.

Preferably, the first locking assembly includes a first electromagnet 41 disposed inside the inner housing 11 and a locking groove 42 disposed inside the driving member, the first armature 411 of the first electromagnet 41 is disposed in the locking groove 42, and the control module 31 controls whether the first electromagnet 41 is energized and cooperates with the locking groove 42 to limit the movement of the driving member; the second locking subassembly including locate the inside second electro-magnet 51 of interior casing 11 and vertically set up in the inside bar groove 52 of driver part, the second armature 511 of second electro-magnet 51 is arranged in bar groove 52, and control module 31 is through whether the control second electro-magnet 51 is got electric and with bar groove 52 cooperation restriction driver part along the gliding distance from top to bottom of interior casing 11.

When the first electromagnet 41 and the second electromagnet 51 are not powered, in this embodiment, the size of the slot of the locking groove 42 matches the size of the first electromagnet 41, that is, the first electromagnet 41 can just be plugged into the locking groove 42, so that the driving part and the inner housing 11 are in a locked state, the driving part cannot move up and down, the driving part cannot slide down, and the second armature 511 is placed in the strip-shaped groove 52;

when the coil of the first electromagnet 41 is energized and the second electromagnet 51 is not energized, the coil will generate magnetic force to attract the first armature 411 inwards, so that the first armature 411 will not abut against the upper end of the inner wall of the locking groove 42, the driving part can slide along the inner housing 11, the driving stamp 23 can move up and down, and at the same time, the second armature 511 will slide up and down along the strip-shaped groove 52; when the second armature 511 abuts against the top end of the bar-shaped groove 52, the driving component cannot slide downward any more, and the stamp 23 cannot move downward either, and only when a corresponding instruction is input to the control module 31, the coil of the second electromagnet 51 is energized, and the second armature 511 is sucked back, so that the second armature 511 is not clamped in the bar-shaped groove 52 any more, and the driving component can continue to drive the stamp 23 to move downward along the inner housing 11, so that the stamp 23 is completely separated from the inside of the inner housing 11, and is moved out from the bottom opening of the inner housing 11. Specifically, in the present embodiment, the length of the strip-shaped groove 52 is determined according to the distance from the original position of the stamp face of the stamp 23 to the position where the stamp face of the stamp 23 slides down to be flush with the plane of the bottom opening of the inner housing 11, that is, the length of the strip-shaped groove 52 is equal to the distance from the original position of the stamp face of the stamp 23 to the plane of the bottom opening of the inner housing 11. Therefore, the second locking assembly is mainly used for limiting the downward movement distance of the stamp 23, specifically, the stamp face of the stamp 23 can only reach the bottom opening plane of the inner housing 11 at the lowest, that is, the stamp face of the stamp 23 can dip in the inkpad or stamp, but the stamp face does not exceed the position of the bottom opening plane of the housing.

Referring to fig. 5, the control module 31 at least includes a power supply unit, a microprocessor, a memory, a first driving unit and a second driving unit, the power supply unit is electrically connected to an input terminal of the microprocessor, the power supply unit includes a power switch switching circuit and a storage battery and/or a mains supply circuit, and the storage battery can directly supply power or directly connect with a mains supply to supply power to the control module; the memory is connected with the input end of the microprocessor and is used for storing control programs for controlling the first electromagnet 41 and the second electromagnet 51, starting instructions and other related data; the input end of the first driving unit and the input end of the second driving unit are electrically connected with the first output end and the second output end of the microprocessor respectively, the output end of the first driving unit is electrically connected with the first electromagnet 41, the output end of the second driving unit is electrically connected with the second electromagnet 51, and whether the first electromagnet 41 and the second electromagnet 51 are powered can be controlled respectively by inputting corresponding instructions to the microprocessor. Specifically, in order to input a corresponding instruction to the control module 31, the control module 31 further includes a key unit and/or a wireless communication unit, and the microprocessor can send a signal for correspondingly controlling the first electromagnet 41 or the second electromagnet 51 to be powered by inputting a corresponding password instruction through the key unit, wherein the key unit can be arranged at the top end of the inner housing 11, so that an operator can input a corresponding instruction conveniently; or signal transmission is realized through the wireless communication unit and the background terminal, and a corresponding instruction can be directly generated to the microprocessor through the background terminal, so that the microprocessor sends out a signal for correspondingly controlling the first electromagnet 41 or the second electromagnet 51 to be electrified; the wireless communication unit can adopt a GPRS unit or a WCDMA unit to realize wireless signal transmission. The program for the microprocessor to control whether the first electromagnet 41 and the second electromagnet 51 are powered according to the instruction is a conventional program. Therefore, the control module 31 can only enable the first electromagnet 41 or both the first electromagnet 41 and the second electromagnet 51 to be powered when sending a correct command to the microprocessor, so that the stamp 23 can be driven by the driving member to dip the inkpad or stamp, and meanwhile, the situation that an unauthorized person replaces or steals the stamp 23 can be avoided.

In addition, the microprocessor can be replaced by a single chip microcomputer or a Programmable Logic Controller (PLC), can be selected according to the cost and the function expansion requirement, and can mainly control the actions of the first electromagnet 41 and the second electromagnet 51.

Because the seal 23 and the driving part are detachably connected, if the sliding distance of the seal surface is not limited, when the first electromagnet 41 is powered on, an operator can drive the seal 23 to move out of the position of the bottom opening of the inner shell 11 to detach the seal 23 and the driving part, so that the seal 23 can be replaced or stolen privately. In the practical use process of seal machine, what the enterprise need stamp is the majority staff of company, consequently increase the second locking subassembly, then can disclose the instruction of unblock first locking subassembly to company's inside personnel is the instruction that first electro-magnet 41 gets electricity, make company's inside personnel have the authority to carry out drive part drive seal 23 and make the seal face can realize dipping in the action of inkpad or stamping, but only have senior managers, just like the law personnel have the instruction of unblock second locking subassembly to control the instruction that second electro-magnet 51 got electricity, consequently increase the second locking subassembly, can make low-level staff still can realize by oneself that the seal face dips in the action of inkpad or stamping, but can't carry out the operation of private self-dismounting seal 23. The safety performance of the stamp 23 is effectively improved.

Preferably, the driving component includes an outer shell 21 and a connecting piece 22, guide rails 211 are arranged on two sides inside the outer shell 21, and a sliding groove 12 matched with the guide rails 211 is arranged on the inner shell 11; the outer shell 21 is sleeved on the inner shell 11, and the outer shell 21 slides up and down along the sliding groove 12; connecting piece 22 locate interior casing 11 inside and with shell body 21 fixed connection, the lower extreme and the seal 23 fixed connection of connecting piece 22, shell body 21 drives seal 23 through drive connecting piece 22 and slides from top to bottom along interior casing 11's inside, both sides still overlap respectively on the guide rail 211 and be equipped with guide rail cover 212, both sides guide rail cover 212 is arranged in respectively between corresponding guide rail 211 and spout 12, locking groove 42 is located on the guide rail cover 212 of one side, bar groove 52 is located on the guide rail cover 212 of opposite side. The upper ends of the guide rail sleeves 212 on the two sides are fixedly connected with the corresponding guide rails 211 through screws respectively, and the guide rail sleeves 212 and the guide rails 211 can be conveniently disassembled and assembled by adopting a screw structure.

Referring to fig. 6, specifically, in practical use, the bottom of the inner housing 11 is covered above the stamping surface, after an instruction for controlling the first electromagnet 41 to be powered is sent to the control module 31, an operator can slide the outer housing 21 downward in a manual mode, the outer housing 21 drives the connecting piece 22 to drive the stamp 23 to slide downward along the inside of the inner housing 11, the stamp 23 moves to a position aligned with the bottom opening of the inner housing 11 to dip the stamping surface with inkpad or stamp, because the second electromagnet 51 is in a state of being not powered, the second armature 511 can be abutted against the top end of the bar-shaped groove 52, and the outer housing 21 cannot slide downward.

In addition, guide rail 211 and spout 12 all are equipped with two, and the both sides of shell body 21 inner wall are located respectively to two guide rails 211, and the inner wall both sides of shell body 11 are located respectively to two spout 12, set up two guide rails 211 and two spout 12 respectively, can improve shell body 21, connecting piece 22 and seal 23 and slide the stability of in-process at last, dynamics and direction when making seal 23 stamp remain stable, improve the position accuracy degree of seal, the colour degree of consistency and the definition of seal. Add guide rail cover 212, can improve the life of guide rail 211 effectively, avoid guide rail 211 and spout 12 direct counterbalance to rub and cause wearing and tearing, still can improve the stability of shell body 21 at last gliding process simultaneously, and keep the synchronism when shell body 21 and seal 23 fall, can avoid shell body 21 to take place the skew at last gliding process and cause seal 23 originally stamp face down to take place the direction skew, influence the effect that stamping or seal face dip in the inkpad.

Preferably, the inner shell 11 and the outer shell 21 are both of a hollow structure, a through groove is formed below the sliding groove 12 of the inner shell 11, the bottom of the guide rail 211 can be fixedly connected with the connecting piece 22 through screws or welding modes, in this embodiment, screws are preferably adopted for fixed connection, the connecting piece 22 and the outer shell 21 can be detachably connected, the connecting piece 22 and the outer shell 21 can be conveniently overhauled and/or replaced, and meanwhile, after the connecting piece 22 and the outer shell 21 are detached, all parts can be conveniently collected and stored, and convenience is improved; in addition, the inner shell 11 and the outer shell 21 are both hollow structures, and through grooves are formed in the inner shell 11 and the outer shell 21, so that the outer shell 21 can penetrate through the inner shell 11 and be fixedly connected with a connecting piece 22 arranged in the inner shell 11, and the outer shell 21 can drive the connecting piece 22 to drive the stamp 23 to synchronously slide up and down.

Preferably, the lower end of the connecting piece 22 is provided with an internal thread hole matched with a threaded rod at the upper end of the stamp 23. Seal 23 is when adopting the upper end to have the structure of threaded rod, like the copper seal, then can set up the internal thread hole that matches with the copper seal upper end in the bottom of connecting piece 22, then accessible helicitic texture realizes that copper seal and connecting piece 22 carry out fixed connection, makes things convenient for seal 23 and connecting piece 22's dismouting simultaneously. Meanwhile, a locking screw can be arranged at the upper end of the connecting piece 22, the bottom of the locking screw is tightly abutted to the copper seal, and when the locking screw is not moved out of the inner shell 11, the copper seal cannot be directly rotated to be detached.

In addition, in another embodiment, the lower end of the connecting member 22 may be provided with a groove for accommodating the stamp 23, and one side of the connecting member is provided with a threaded hole and a locking screw which are communicated with the groove, so that, for a general stamp 23, the handheld portion at the upper end of the stamp 23 may be directly placed in the groove at the lower end of the connecting member 22, so that the stamp face of the stamp 23 faces downward and is parallel to the bottom face of the connecting member 22, and the bottom face of the locking screw abuts against the handheld portion of the stamp 23 by rotating the locking screw, thereby fixing the stamp 23 in the connecting member 22.

The utility model discloses in, seal 23's installation or dismantlement need shell body 21 drive connecting piece 22 from interior shell body 11 bottom open-ended lower extreme after, just can realize seal 23 and connecting piece 22's installation or dismantlement.

Preferably, a cross frame 13 is further disposed at an upper end inside the inner housing 11, and the first electromagnet 41 and the second electromagnet 51 are respectively fixed to the cross frame 13. The cross frame 13 is provided to lock the driving member and the inner case 11 and to restrict the sliding distance of the driving member by engaging with the locking groove 42 and the strip groove 52 while keeping the positions of the first electromagnet 41 and the second electromagnet 51 fixed.

Preferably, the control module 31 is fixed above the cross frame 13 and is fixedly connected with the inner housing 11. The control module 31 may be fixed to the inner housing 11 by a fixing frame and a bolt structure.

Preferably, the driving part further comprises a return spring 61, one end of the return spring 61 is fixedly connected with the lower end of the cross frame 13, and the other end of the return spring 61 is fixedly connected with the upper end of the connecting piece 22.

Referring to fig. 6 and 7, in actual use, the inner case 11 is placed at the seal, after the first electromagnet 41 is electrically unlocked the first locking assembly, the outer housing 21 can be directly and manually slid downwards, at this time, the inner housing 11 is kept still, the outer housing 21 drives the connecting member 22 to drive the stamp 23 to slide downwards along the inside of the inner housing 11, the stamp 23 is moved to a position aligned with the bottom opening of the inner housing to dip the stamp face with inkpad or stamp, in the process, the return spring 61 is stretched as the connecting member 22 slides down, and when the force applied to the outer housing 21 is stopped, the elastic member will recover its original shape due to the elastic deformation, and will pull the connecting member 22 back to its original position, and will make the connecting member 22, the stamp 23 and the outer housing 21 return to their original positions synchronously, meanwhile, the first electromagnet 41 is not electrified any more, and the first armature 411 is clamped in the locking groove 42, so that the outer shell 21 cannot move downwards.

If the second electromagnet 51 is also powered during the sliding process, the second electromagnet can continuously apply force to the outer shell 21, the outer shell 21 continues to slide downwards, the return spring 61 continues to be stretched, when the stamp 23 or the connecting end of the stamp 23 and the connecting piece 22 is exposed out of the bottom of the inner shell 11, the stamp 23 can be detached or mounted, after the detachment is completed, the connecting piece 22 is loosened, the return spring 61 pulls back the driving part, then the second electromagnet 51 and the first electromagnet 41 are sequentially powered off, the second armature 511 is reset to be placed in the strip-shaped groove 52, and then the first armature 411 is reset to be placed in the locking groove 42.

The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the technical effects of the present invention should be all included in the protection scope of the present invention as long as the technical effects are achieved by any of the same or similar means.

Claims

1. The utility model provides a portable seal machine with locking structure which characterized in that: the stamping device comprises an inner shell (11), a stamp (23) and a driving component, wherein the stamp (23) is arranged in the inner shell (11) and fixedly connected with the driving component, the driving component is in sliding connection with the inner shell (11), and the driving component drives the stamp (23) to move up and down in the shell along the vertical direction; a control module (31), a first locking assembly and a second locking assembly which are respectively electrically connected with the control module (31) are further arranged between the inner shell (11) and the driving part, the first locking assembly is used for locking the driving part and the inner shell (11) and limiting the driving part to drive the stamp (23) to move; the second locking assembly is used for limiting the distance of the driving component sliding up and down along the inner shell (11).

2. The portable stamping machine with locking structure as claimed in claim 1, wherein: the first locking assembly comprises a first electromagnet (41) arranged in the inner shell (11) and a locking groove (42) arranged in the driving component, a first armature (411) of the first electromagnet (41) is arranged in the locking groove (42), and the control module (31) controls whether the first electromagnet (41) is electrified and is matched with the locking groove (42) to limit the movement of the driving component; second locking subassembly including locate inside second electro-magnet (51) of interior casing (11) and vertical set up in bar groove (52) inside the driver part, bar groove (52) are arranged in second armature (511) of second electro-magnet (51), and whether control module (31) are got electric and are restricted driver part along interior casing (11) gliding distance from top to bottom with bar groove (52) cooperation through control second electro-magnet (51).

3. The portable stamping machine with locking structure as claimed in claim 2, wherein: the driving component comprises an outer shell (21) and a connecting piece (22), guide rails (211) are arranged on two sides inside the outer shell (21), and a sliding groove (12) matched with the guide rails (211) is formed in the inner shell (11); the outer shell (21) is sleeved on the inner shell (11), and the outer shell (21) slides up and down along the sliding groove (12); connecting piece (22) locate the inside of interior casing (11) and with shell body (21) fixed connection, the lower extreme and seal (23) fixed connection of connecting piece (22), shell body (21) slide from top to bottom along the inside of interior casing (11) through drive connecting piece (22) drive seal (23), both sides still overlap respectively on guide rail (211) and be equipped with guide rail cover (212), both sides guide rail cover (212) are arranged respectively in between corresponding guide rail (211) and spout (12), locking groove (42) are located on guide rail cover (212) of one side, bar groove (52) are located on guide rail cover (212) of opposite side.

4. The portable stamping machine with locking structure as claimed in claim 3, wherein: the lower end of the connecting piece (22) is provided with an internal thread hole matched with a threaded rod at the upper end of the stamp (23).

5. The portable stamping machine with locking structure as claimed in claim 3, wherein: the upper end in the inner shell (11) is further provided with a transverse frame (13), and the first electromagnet (41) and the second electromagnet (51) are respectively fixed on the transverse frame (13).

6. The portable stamping machine with locking structure as claimed in claim 5, wherein: the control module (31) is fixed above the transverse frame (13) and is fixedly connected with the inner shell (11).

7. The portable stamping machine with locking structure as claimed in claim 5, wherein: the driving part further comprises a return spring (61), one end of the return spring (61) is fixedly connected with the lower end of the cross frame (13), and the other end of the return spring (61) is fixedly connected with the upper end of the connecting piece (22).