阅读说明：本技术 一种恒温恒湿柜门用齿轮齿条驱动锁闭机构及其工作方法 (Gear and rack driving locking mechanism for constant temperature and humidity cabinet door and working method of gear and rack driving locking mechanism ) 是由 张洪涛 于 2021-08-10 设计创作，主要内容包括：本发明公开了一种恒温恒湿柜门用齿轮齿条驱动锁闭机构,设置在柜门主体的内侧,包括齿轮和上下活动组件,上下活动组件包括齿条导柱、第一导向套座、转接件、锁舌和第二导向座,齿轮设置在柜门主体内侧面中间位置,齿条导柱竖直设置且与齿轮啮合,齿条导柱两端分别导向滑动在一个第一导向套座内,齿条导柱外端连接转接件,转接件两端竖直向外探出锁舌,锁舌导向滑动在第二导向座内,锁舌前端能够向外探出穿过柜门锁舌孔后锁紧在门框插孔中；第一导向套座和第二导向座结构一致。本发明恒温恒湿柜门用齿轮齿条驱动锁闭机构及其工作方法,严格导向锁舌伸缩,多点锁定,锁闭强度高,柜门锁定牢固。(The invention discloses a gear and rack driven locking mechanism for a constant temperature and humidity cabinet door, which is arranged on the inner side of a cabinet door main body and comprises a gear and an up-down movable assembly, wherein the up-down movable assembly comprises a rack guide pillar, a first guide sleeve seat, an adapter, a lock tongue and a second guide seat; the first guide sleeve seat and the second guide sleeve seat are consistent in structure. The gear and rack driven locking mechanism for the constant-temperature and constant-humidity cabinet door and the working method thereof strictly guide the spring bolt to stretch and retract, lock at multiple points, have high locking strength and lock the cabinet door firmly.)

1. The utility model provides a constant temperature and humidity rack gear drive locking mechanism for cabinet door, sets up the inboard at cabinet door main part (1), its characterized in that: the door lock comprises a gear (2) and an up-down movable assembly, wherein the up-down movable assembly comprises a rack guide post (3), a first guide sleeve seat (4), an adapter (5), a bolt (6) and a second guide seat (7), the gear (2) is arranged in the middle of the inner side surface of a cabinet door main body (1), the rack guide post (3) is vertically arranged and meshed with the gear (2), two ends of the rack guide post (3) respectively slide in the first guide sleeve seat (4) in a guiding manner, the outer end of the rack guide post (3) is connected with the adapter (5), two ends of the adapter (5) vertically extend out of the bolt (6), the bolt (6) slides in the second guide sleeve seat (7) in a guiding manner, and the front end of the bolt (6) can extend out to pass through a cabinet door bolt hole (101) and then is locked in a door frame jack; the first guide sleeve seat (4) and the second guide sleeve seat (7) are consistent in structure.

2. The rack and pinion driving locking mechanism for the constant temperature and humidity cabinet door according to claim 1, characterized in that: the upper and lower movable assemblies are arranged symmetrically along the axis of the gear (2), and the two lock tongues (6) can lock the cabinet door main body (1) to the door frame upwards and downwards respectively.

3. The gear and rack driven locking mechanism for the constant temperature and humidity cabinet door according to claim 2, characterized in that: the adaptor (5) is made of C-shaped steel, the opening of the C-shaped steel is arranged outwards, and a plurality of coaxial insertion holes (501) are formed in two side plates of the adaptor (5); the rack guide post (3) and the end part of the bolt (6) are inserted into the insertion hole (501) and are connected in a welding mode.

4. The rack and pinion driving locking mechanism for the constant temperature and humidity cabinet door according to claim 1, characterized in that: the second guide seat (7) comprises a guide sleeve (702), a pressure spring (703) and a plug (704); the front section of a middle hole of the second guide seat (7) is set as a threaded hole section (705), the rear section of the middle hole is set as a taper hole (701), the outer surface of the guide sleeve (702) is set as a conical surface matched with the taper hole (701), and an inner hole of the guide sleeve (702) guides the lock tongue (6) of the cylinder; the guide sleeve (702) is arranged in the taper hole (701), the plug (704) is in threaded connection with the threaded hole section (705), and the plug (704) presses the pressure spring (703) to the rear end face of the guide sleeve (702).

5. The rack and pinion driving locking mechanism for the constant temperature and humidity cabinet door according to claim 4, characterized in that: the guide sleeve (702) is made of tin bronze or polytetrafluoroethylene materials.

6. The gear and rack driven locking mechanism for the constant temperature and humidity cabinet door according to claim 5, characterized in that: the deformation joint is arranged on the guide sleeve (702) and axially arranged along the guide sleeve (702).

7. The rack and pinion driving locking mechanism for the constant temperature and humidity cabinet door according to claim 6, wherein: the deformation joint comprises a first deformation joint (7021) and a second deformation joint (7022), the first deformation joint (7021) is arranged from the large end of the guide sleeve (702) to the middle part, the second deformation joint (7022) is arranged from the small end of the guide sleeve (702) to the middle part, and the first deformation joint (7021) and the second deformation joint (7022) are overlapped in the middle part; the number of the first deformation joint (7021) and the second deformation joint (7022) is consistent and is a plurality of and circumference equipartitions, and the first deformation joint (7021) and the second deformation joint (7022) are arranged in a circumferential staggered manner.

8. The gear and rack driven locking mechanism for the constant temperature and humidity cabinet door according to any one of claims 4 to 7, characterized in that: the bolt locking device is characterized by further comprising a gasket (706), wherein the gasket (706) is sleeved on the bolt (6) and is arranged between the pressure spring (703) and the large end face of the guide sleeve (702).

9. The gear and rack driven locking mechanism for the constant temperature and humidity cabinet door according to claim 8, characterized in that: the outer end face of the plug (704) is provided with a plurality of wrench holes (7041), and the wrench holes (7041) are uniformly distributed on the circumference.

10. A working method of a gear and rack driven locking mechanism for a constant temperature and humidity cabinet door is characterized in that the gear and rack driven locking mechanism for the constant temperature and humidity cabinet door according to any one of claims 1 to 9 is used for locking the cabinet door on a door frame, and a lock tongue strictly guides telescopic motion and locks at multiple points.

Technical Field

The invention relates to the technical field of constant temperature and humidity cabinets, in particular to a gear and rack driving locking mechanism for constant temperature and humidity cabinet doors and a working method of the gear and rack driving locking mechanism.

Background

The museum cultural relic storage cabinet is a device which is used for storing valuable article materials and can simulate a suitable storage environment for the stored articles in order to prevent the stored article materials from deforming, deteriorating and losing effectiveness. The cabinet body controls the temperature and the humidity in the cabinet by utilizing the built-in working module, and can be called as a constant temperature and humidity cabinet due to the special function effect. The device is widely applied to storage of articles such as cultural relics, paintings and calligraphy, precision instruments, biological samples, film films, valuable materials and the like.

However, the locking mechanism of the existing constant temperature and humidity cabinet is relatively simple, and a split door middle seam bolt locking mode or an external inserting plate locking mode is often adopted. The disadvantage that the locking safety is poor and the sealing isolation failure caused by the loosening of the cabinet door is easy to occur exists.

Therefore, it is necessary to develop a rack and pinion driving locking mechanism for a door of a constant temperature and humidity cabinet and a working method thereof.

Disclosure of Invention

The invention aims to provide a gear and rack driven locking mechanism for a constant temperature and humidity cabinet door, which strictly guides a lock tongue to stretch and retract, locks at multiple points, has high locking strength and firmly locks the cabinet door.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention relates to a gear and rack driven locking mechanism for a constant temperature and humidity cabinet door, which is arranged on the inner side of a cabinet door main body and comprises a gear and an up-down movable assembly, wherein the up-down movable assembly comprises a rack guide pillar, a first guide sleeve seat, an adapter, a lock tongue and a second guide seat, the gear is arranged in the middle position of the inner side surface of the cabinet door main body, the rack guide pillar is vertically arranged and is meshed with the gear, two ends of the rack guide pillar are respectively guided and slide in the first guide sleeve seat, the outer end of the rack guide pillar is connected with the adapter, two ends of the adapter vertically extend out of the lock tongue, the lock tongue is guided and slides in the second guide seat, and the front end of the lock tongue can extend out to pass through a lock tongue hole of the cabinet door and then is locked in a door frame jack; the first guide sleeve seat and the second guide sleeve seat are consistent in structure.

Furthermore, the upper and lower movable assemblies are arranged in two sets, the upper and lower movable assemblies are arranged along the axis of the gear in a central symmetry manner, and the two sets of lock tongues can respectively lock the cabinet door main body to the door frame upwards and downwards.

Furthermore, the adaptor is made of C-shaped steel, the opening of the C-shaped steel is arranged outwards, and a plurality of coaxial insertion holes are formed in two side plates of the adaptor; the rack guide post and the end part of the lock tongue are inserted into the insertion hole and are connected in a welding mode.

Further, the second guide seat comprises a guide sleeve, a pressure spring and a plug; the front section of a middle hole of the second guide seat is a threaded hole section, the rear section of the middle hole of the second guide seat is a taper hole, the outer surface of the guide sleeve is a conical surface matched with the taper hole, and the inner hole of the guide sleeve guides the lock tongue of the cylinder; the guide sleeve is arranged in the taper hole, the plug is in threaded connection with the threaded hole section, and the plug compresses the pressure spring to the rear end face of the guide sleeve.

Furthermore, the guide sleeve is made of tin bronze or polytetrafluoroethylene materials.

Furthermore, a deformation joint is formed in the guide sleeve, and the deformation joint is axially arranged along the guide sleeve.

Furthermore, the deformation joint comprises a first deformation joint and a second deformation joint, the first deformation joint is arranged from the large end of the guide sleeve to the middle part, the second deformation joint is arranged from the small end of the guide sleeve to the middle part, and the first deformation joint and the second deformation joint are overlapped in the middle part; the quantity of first movement joint and second movement joint is unanimous for a plurality of and circumference equipartition, first movement joint and second movement joint circumference stagger arrange.

Furthermore, the spring bolt assembly further comprises a gasket, wherein the gasket is sleeved on the spring bolt and is arranged between the pressure spring and the large end face of the guide sleeve.

Furthermore, a plurality of wrench holes are formed in the outer end face of the plug, and are evenly distributed on the circumference of each wrench hole.

The invention also discloses a working method of the rack and pinion driving locking mechanism for the constant temperature and humidity cabinet door, the rack and pinion driving locking mechanism for the constant temperature and humidity cabinet door is used for locking the cabinet door on the door frame, and the lock tongue strictly guides the telescopic action and locks at multiple points.

Compared with the prior art, the invention has the beneficial technical effects that:

according to the gear rack driving locking mechanism for the constant temperature and humidity cabinet door, the first guide sleeve seat and the second guide seat are arranged, the guide rack guide column and the lock tongue are guided, so that a large lateral clearance is avoided when the upper and lower movable assemblies move, the cabinet door is locked more tightly, and looseness is avoided. A lock tongue is respectively extended out vertically and outwards from two ends of the adapter, so that the two positions can be locked, and the locking strength is improved. By arranging two sets of up-and-down movable assemblies which are symmetrical about the axis of the gear, one gear drives two rack guide posts which are arranged in parallel at the same time, and the upper lock tongue and the lower lock tongue synchronously extend out or return, the driving efficiency is improved, the gear is symmetrical in stress, torsion deformation cannot occur, and the service life of the equipment is prolonged. The gear and rack driving locking mechanism for the constant-temperature and constant-humidity cabinet door strictly guides the spring bolt to stretch, locks at multiple points, and is high in locking strength and firm in locking the cabinet door.

In addition, select to C shaped steel through the adaptor, the opening is outwards, is convenient for observe the cartridge condition of rack guide pillar and spring bolt, simultaneously, is convenient for carry out spot welding fixed in the inboard during the welding. The guide sleeve is arranged in the taper hole and is pre-compressed by the pressure spring, the guide sleeve can be extruded, the diameter of the inner hole of the guide sleeve is reduced, and then the gap between the guide sleeve and the lock tongue is closed, so that the lateral shaking of the lock tongue is avoided, and the guiding accuracy is improved; the compression spring is pre-compressed through the plug, the compression strength can be adjusted, the holding force of the guide sleeve to the lock tongue is further adjusted, and flexible adjustment is performed according to the use condition. Through set up the movement joint on the uide bushing, can increase the elastic deformation ability of uide bushing, the plastic deformation that the uide bushing appears when having avoided hard extrusion. Through the deformation joint sets up to the first deformation joint and the second deformation joint of dislocation, and overlaps in first deformation joint and second deformation joint middle part, can wholly lead to long whole elastic shrinkage deformation. Through the arrangement of the gasket, the guide sleeve with relatively soft texture can be effectively protected, and the indentation and crushing condition caused by the fact that the guide sleeve directly contacts the pressure spring is avoided; the pressure spring is in a disc spring group form, so that the axial size of the spring is small, the elasticity is large, the structure is compact, and the spring is convenient to integrate into the second guide seat; through the setting of spanner hole, convenient to use special spanner carries out the rotating adjustment, convenient operation.

Drawings

The invention is further illustrated in the following description with reference to the drawings.

FIG. 1 is a schematic structural view of a gear and rack driven locking mechanism for a constant temperature and humidity cabinet door according to the present invention;

FIG. 2 is a schematic cross-sectional structural view of a bolt mounting part of the adaptor of the present invention;

FIG. 3 is a longitudinal sectional view of a second guide sleeve seat according to the present invention;

fig. 4 is a schematic top view of the guide sleeve of the present invention.

Description of reference numerals: 1. a cabinet door main body; 101. a lock bolt hole of the cabinet door; 2. a gear; 3. a rack guide post; 4. a first guide sleeve seat; 5. an adapter; 501. inserting holes; 6. a latch bolt; 7. a second guide sleeve seat; 701. a taper hole; 702. a guide sleeve; 7021. a first deformation joint; 7022. a second deformation joint; 703. a pressure spring; 704. plugging with a thread; 7041. a wrench hole; 705. a threaded bore section; 706. and (7) a gasket.

Detailed Description

The core of the invention is to provide a gear and rack driven locking mechanism for a constant temperature and humidity cabinet door and a working method thereof, which strictly guide the stretching of a lock tongue, realize multipoint locking, have high locking strength and ensure that the cabinet door is firmly locked.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to the attached drawings, fig. 1 is a schematic structural view of a gear and rack driven locking mechanism for a constant temperature and humidity cabinet door of the invention; FIG. 2 is a schematic cross-sectional structural view of a bolt mounting part of the adaptor of the present invention; FIG. 3 is a longitudinal sectional view of a second guide sleeve seat according to the present invention; fig. 4 is a schematic top view of the guide sleeve of the present invention.

In one embodiment, as shown in fig. 1, a rack and pinion driving locking mechanism for a constant temperature and humidity cabinet door is arranged inside a cabinet door body 1 and comprises a rotating gear 2 and an up-and-down movable assembly. The up-down movable assembly comprises a rack guide post 3, a first guide sleeve seat 4, an adapter 5, a lock tongue 6 and a second guide seat 7. The gear 2 is arranged in the middle of the inner side face of the cabinet door main body 1, and the gear 2 is connected to a hand wheel on the outer side of the cabinet door main body 1 through a transmission mechanism with a lock cylinder. Rack guide pillar 3 is the cylinder strip and is provided with the driving gear in one side, rack guide pillar 3 is vertical to be set up and meshes with gear 2, rack guide pillar 3 both ends are provided with first uide bushing seat 4 respectively, and the direction slides in first uide bushing seat 4, 3 outer end welded connection adaptor 5 of rack guide pillar, adaptor 5 both ends are vertical outwards to be stretched out a spring bolt 6 respectively, spring bolt 6 direction slides in second uide bushing 7, the locking bolt 6 front end can outwards be stretched out and lock in the door frame jack after passing cabinet lock tongue hole 101. The first guide sleeve seat 4 and the second guide seat 7 have the same structure, and can guide the guide column in sliding fit strictly without gap.

Specifically, as shown in fig. 1, the upper and lower movable assemblies are two sets, the two sets of upper and lower movable assemblies are arranged along the axis of the gear 2 in a central symmetry manner, and the two sets of locking tongues 6 can lock the cabinet door main body 1 to the door frame upwards and downwards respectively.

Through the setting of first uide bushing seat 4 and second uide bushing seat 7, direction rack guide pillar 3 and spring bolt 6 avoid appearing great side clearance appears when the activity subassembly moves from top to bottom, and the locking cabinet door is inseparabler, avoids appearing becoming flexible. A bolt 6 is vertically outwards extended from two ends of the adapter 5 respectively, so that the two parts can be locked, and the locking strength is improved. Through setting up two sets of about gear 2 axis central symmetry the activity subassembly from top to bottom, a gear 2 drives two parallel arrangement's rack guide pillar 3 simultaneously, and two upper and lower spring bolts 6 are synchronous to be stretched out or are returned, have improved drive efficiency, and gear 2 symmetry atress can not take place torsion deformation moreover, has improved equipment life. The gear and rack driving locking mechanism for the constant-temperature and constant-humidity cabinet door strictly guides the spring bolt to stretch, locks at multiple points, and is high in locking strength and firm in locking the cabinet door.

In a specific implementation manner of embodiment 1 of the present invention, as shown in fig. 2, the adaptor 5 is a C-shaped steel, an opening of the C-shaped steel is disposed outwards, a plurality of coaxial insertion holes 501 are disposed on two side plates of the adaptor 5, and when the holes are processed, one insertion hole 501 is formed by drilling or boring after being clamped once, so that coaxiality of holes of the two side plates is ensured. The rack guide post 3 and the end of the bolt 6 are inserted into the insertion hole 501 for welding connection, and during welding, after the periphery is symmetrically spot-welded firmly, the welding is symmetrically performed. Obviously, the adaptor 5 may also be a square pipe or a rectangular pipe as the main body, and similar modifications fall within the scope of the present invention.

Select to C shaped steel through adaptor 5, the opening is outwards, is convenient for observe the cartridge condition of rack guide pillar 3 and spring bolt 6, simultaneously, is convenient for carry out spot welding in the inboard during the welding and fixes.

In a specific embodiment of embodiment 1 of the present invention, as shown in fig. 3 and 4, the second guide holder 7 includes a guide sleeve 702, a compression spring 703, and a plug 704. The front section of the middle hole of the second guide seat 7 is set as a threaded hole section 705, and the rear section is set as a taper hole 701. The outer surface of the guide sleeve 702 is a conical surface matched with the conical hole 701, and the inner hole of the guide sleeve 702 is a round hole and guides the cylindrical bolt 6. The guide sleeve 702 is arranged in the taper hole 701, the external thread of the plug 704 is in threaded connection with the threaded hole section 705, and the plug 704 presses the compression spring 703 onto the rear end face of the guide sleeve 702.

Specifically, the guide sleeve 702 is made of tin bronze or polytetrafluoroethylene.

Specifically, as shown in fig. 4, the guide sleeve 702 is provided with a deformation joint, and the deformation joint is provided along the axial direction of the guide sleeve 702.

Specifically, as shown in fig. 4, the deformation joint includes a first deformation joint 7021 and a second deformation joint 7022, the first deformation joint 7021 is arranged from the large end of the guide sleeve 702 to the middle, the second deformation joint 7022 is arranged from the small end of the guide sleeve 702 to the middle, and the first deformation joint 7021 and the second deformation joint 7022 are overlapped in the middle. The number of the first deformation joints 7021 is consistent with that of the second deformation joints 7022, the first deformation joints 7021 are circumferentially and uniformly distributed, and the second deformation joints 7022 are circumferentially staggered.

The guide sleeve 702 is arranged in the taper hole 701 and is pre-compressed by the pressure spring 703, the guide sleeve 702 can be extruded, the diameter of the inner hole of the guide sleeve 702 is reduced, and then the gap between the guide sleeve 702 and the lock tongue 6 is closed, so that the lateral shaking of the lock tongue 6 is avoided, and the guiding accuracy is improved; the pressure spring 703 is pre-compressed by the plug 704, so that the compression strength can be adjusted, the holding force of the guide sleeve 702 on the lock tongue 6 is further adjusted, and flexible adjustment is performed according to the use condition. By providing a deformation joint on the guide sleeve 702, the elastic deformability of the guide sleeve 702 can be increased, avoiding plastic deformation of the guide sleeve 702 during hard extrusion. The deformation joint is set into a first deformation joint 7021 and a second deformation joint 7022 which are staggered, and the middle parts of the first deformation joint 7021 and the second deformation joint 7022 are overlapped, so that the whole deformation joint can be wholly elastically contracted and deformed in the whole full length.

In a specific implementation manner of embodiment 1 of the present invention, as shown in fig. 3, the gear and rack driven locking mechanism for a constant temperature and humidity cabinet door of the present invention further includes a gasket 706, and the gasket 706 is sleeved on the bolt 6 and is disposed between the compression spring 703 and the large end surface of the guide sleeve 702.

Specifically, as shown in fig. 3, the compression spring 703 is a plurality of disc springs connected in series. The disc spring group is pre-compressed between the large end surface of the guide sleeve 702 and the inner end surface of the plug 704.

Specifically, as shown in fig. 3, the outer end surface of the plug 704 is provided with a plurality of wrench holes 7041, and the wrench holes 7041 are circumferentially and uniformly arranged. Using a special wrench, the post from which the wrench protrudes can be inserted into the wrench aperture 7041 to rotate the plug 704.

By arranging the gasket 706, the guide sleeve 702 with relatively soft texture can be effectively protected, and the situation that the guide sleeve 702 is directly contacted with the pressure spring 703 to cause indentation and crushing is avoided; the compression spring 703 adopts a disc spring group form, so that the axial size of the spring is small, the elasticity is large, the structure is compact, and the integration into the second guide seat 7 is convenient; through the setting of spanner hole 7041, convenient to use special spanner to carry out the rotating adjustment, convenient operation.

The invention also discloses a working method of the gear and rack driven locking mechanism for the constant-temperature and constant-humidity cabinet door, the gear and rack driven locking mechanism for the constant-temperature and constant-humidity cabinet door in any embodiment is utilized to lock the cabinet door on the door frame, and the lock tongue strictly guides telescopic action and locks at multiple points.

According to the gear and rack driven locking mechanism for the constant-temperature and constant-humidity cabinet door, the first guide sleeve seat 4 and the second guide seat 7 are arranged, the guide rack guide column 3 and the lock tongue 6 are used for preventing a larger lateral clearance from occurring when the upper and lower movable assemblies move, the cabinet door is locked more tightly, and looseness is avoided. A bolt 6 is vertically outwards extended from two ends of the adapter 5 respectively, so that the two parts can be locked, and the locking strength is improved. Through setting up two sets of about gear 2 axis central symmetry the activity subassembly from top to bottom, a gear 2 drives two parallel arrangement's rack guide pillar 3 simultaneously, and two upper and lower spring bolts 6 are synchronous to be stretched out or are returned, have improved drive efficiency, and gear 2 symmetry atress can not take place torsion deformation moreover, has improved equipment life. The gear and rack driving locking mechanism for the constant-temperature and constant-humidity cabinet door strictly guides the spring bolt to stretch, locks at multiple points, and is high in locking strength and firm in locking the cabinet door. In addition, select to C shaped steel through adaptor 5, the opening is outwards, is convenient for observe the cartridge condition of rack guide pillar 3 and spring bolt 6, simultaneously, is convenient for carry out spot welding fixed in the inboard during the welding. The guide sleeve 702 is arranged in the taper hole 701 and is pre-compressed by the pressure spring 703, the guide sleeve 702 can be extruded, the diameter of the inner hole of the guide sleeve 702 is reduced, and then the gap between the guide sleeve 702 and the lock tongue 6 is closed, so that the lateral shaking of the lock tongue 6 is avoided, and the guiding accuracy is improved; the pressure spring 703 is pre-compressed by the plug 704, so that the compression strength can be adjusted, the holding force of the guide sleeve 702 on the lock tongue 6 is further adjusted, and flexible adjustment is performed according to the use condition. By providing a deformation joint on the guide sleeve 702, the elastic deformability of the guide sleeve 702 can be increased, avoiding plastic deformation of the guide sleeve 702 during hard extrusion. The deformation joint is set into a first deformation joint 7021 and a second deformation joint 7022 which are staggered, and the middle parts of the first deformation joint 7021 and the second deformation joint 7022 are overlapped, so that the whole deformation joint can be wholly elastically contracted and deformed in the whole full length. By arranging the gasket 706, the guide sleeve 702 with relatively soft texture can be effectively protected, and the situation that the guide sleeve 702 is directly contacted with the pressure spring 703 to cause indentation and crushing is avoided; the compression spring 703 adopts a disc spring group form, so that the axial size of the spring is small, the elasticity is large, the structure is compact, and the integration into the second guide seat 7 is convenient; through the setting of spanner hole 7041, convenient to use special spanner to carry out the rotating adjustment, convenient operation.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the scope of the present invention is defined by the claims.