CN213550661U

CN213550661U - Movable accomodates cabinet

Info

Publication number: CN213550661U
Application number: CN202020845114.7U
Authority: CN
Inventors: 刘佳音
Original assignee: Ningbo Fengyuan Outdoor Products Technology Co ltd
Current assignee: Ningbo Fengyuan Outdoor Products Technology Co ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2021-06-29
Anticipated expiration: 2030-05-19

Abstract

The utility model relates to a cabinet is accomodate to movable relates to household articles's technical field, and it includes the cabinet body, seted up on the cabinet body and accomodate the chamber, one side of the cabinet body is equipped with the lid and closes the apron of accomodating the chamber, the apron is articulated with the cabinet body, cabinet body downside an organic whole is equipped with the landing leg, the quantity of landing leg is two, two the cabinet body is located to the landing leg corner with one side, one side corner that the landing leg was kept away from to the cabinet body is equipped with two universal wheels. The utility model discloses need not to wholly lift up the cabinet of accomodating when having the removal and accomodating the cabinet, remove convenient laborsaving, reduced porter's intensity of labour's effect.

Description

Movable accomodates cabinet

Technical Field

The utility model belongs to the technical field of household articles's technique and specifically relates to a cabinet is accomodate to movable.

Background

At present people's consumption level is higher and higher, and the article of purchasing is also more and more, often can buy the article that are not very common use, and these articles are stacked in a disorderly and indiscriminate place in life and work area, have occupied a large amount of spaces, so people are now with accomodating the cabinet and are going to hold the article that do not use often.

Referring to fig. 9, the existing storage cabinet includes a cabinet body 1, a storage cavity 16 has been opened on the cabinet body 1, an upper side of the cabinet body 1 is provided with a cover plate 2 covering the storage cavity 16, the cover plate 2 is hinged to one side of the cabinet body 1, and a supporting leg 11 is integrally arranged on a lower side of the cabinet body 1.

The above prior art solutions have the following drawbacks: the storage cabinet is supported and placed through the supporting legs, when the storage cabinet needs to be moved, the storage cabinet is often lifted by a carrying person and then carried, and the carrying is relatively labor-consuming, high in labor intensity and improved.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a cabinet is accomodate to movable need not to wholly lift up the cabinet of accomodating when removing the cabinet of accomodating, removes convenient laborsaving, has reduced porter's intensity of labour.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the utility model provides a cabinet is accomodate to movable, includes the cabinet body, seted up on the cabinet body and accomodate the chamber, one side of the cabinet body is equipped with the lid and closes the apron of accomodating the chamber, the apron is articulated with one side of the cabinet body, downside an organic whole of the cabinet body is equipped with the landing leg, the quantity of landing leg is two, two the corner with one side of the cabinet body is located to the landing leg, the downside of the cabinet body still is equipped with two universal wheels, two one side that the landing leg was kept away from to the cabinet body is.

Through adopting above-mentioned technical scheme, when the cabinet is accomodate in needs transport, only need to lift the one end that the cabinet body is close to the landing leg, can promote through the rolling butt on universal wheel and ground and accomodate the cabinet and remove, and need not to accomodate the cabinet wholly and lift up, remove comparatively convenient laborsaving, reduced porter's intensity of labour, when need not remove, put down the landing leg and can place and accomodate the cabinet, make and accomodate the cabinet and be difficult for removing.

The present invention may be further configured in a preferred embodiment as: one side of the cover plate close to the cabinet body is provided with an air spring, one end of the air spring is hinged with the cover plate, and the other end of the air spring is hinged with the inner side wall of the cabinet body.

Through adopting above-mentioned technical scheme, when accomodating the cabinet and being in the open mode, the air spring is in the extension state, plays the effect that supports the apron, and convenience of customers gets and puts article, and when accomodating the cabinet and being in the closed condition, the air spring is in the contraction state, provides the pulling force, makes the apron be difficult for opening when the unmanned operation, has improved the stability when accomodating the cabinet closure.

The present invention may be further configured in a preferred embodiment as: the cover plate is far away from the cabinet body and is provided with an upper handle at one side far away from the hinge, the cover plate is provided with a penetrating hole, the cover plate is provided with a bolt, and the bolt sequentially penetrates through the penetrating hole and the upper handle and is in threaded connection with the upper handle.

Through adopting above-mentioned technical scheme, go up the setting of handle, convenience of customers grips when opening the apron to exert the pulling force to the apron, improved the efficiency of opening of apron.

The present invention may be further configured in a preferred embodiment as: and one side of the cover plate, which is close to the cabinet body, is also integrally provided with a reinforcing rib.

Through adopting above-mentioned technical scheme, the strengthening rib is vertically and horizontally staggered and sets up, strengthens the structure of apron, has increased the impacted ability of apron, has improved the life of apron.

The present invention may be further configured in a preferred embodiment as: one side of the cabinet body far away from the universal wheels is hinged with a side handle.

Through adopting above-mentioned technical scheme, the setting of side handle, convenience of customers grips when removing the cabinet of accomodating to the one end that the universal wheel was kept away from to the cabinet of accomodating is lifted up and is promoted the cabinet of accomodating, has improved the removal efficiency of accomodating the cabinet.

The present invention may be further configured in a preferred embodiment as: the cabinet body is kept away from one side of universal wheel and has been seted up the standing groove, the side handle articulates in the standing groove.

Through adopting above-mentioned technical scheme, the side handle articulates in the standing groove, and when the cabinet is accomodate to unmovable, the side handle is whole to be placed in the standing groove, reduces the space occupancy of accomodating the cabinet.

The present invention may be further configured in a preferred embodiment as: a groove is further formed in one side, close to the supporting legs, of the cabinet body, the groove penetrates through the bottom wall of the cabinet body, a pulley is embedded in the groove, a hollow lifting rod is integrally arranged on the upper side of the pulley, a movable groove is further formed in one side, close to the supporting legs, of the cabinet body, the movable groove is communicated with the groove, the lifting rod is embedded in the movable groove and connected with the movable groove in a sliding mode, a mounting plate covering the movable groove is further arranged on one side, close to the supporting legs, of the cabinet body, and one side wall of the lifting rod is abutted to the mounting plate and slides;

the locking assembly is arranged on the lifting rod and clamped with the mounting plate.

Through adopting above-mentioned technical scheme, when needs remove and accomodate the cabinet, remove the locking of locking Assembly to the lifter, take out the pulley from the recess, make pulley and ground butt, and the landing leg breaks away from ground, need not to lift the cabinet body and can remove and accomodate the cabinet, further reduced transport personnel's intensity of labour.

The present invention may be further configured in a preferred embodiment as: the locking subassembly is including inlaying compression spring and the button piece of locating in the lifter, first interlude hole has been seted up on a lateral wall that the lifter is close to the mounting panel, the button piece is worn to locate in the first interlude hole and slides with first interlude hole and is connected, the one end an organic whole that the button piece is close to the lifter is equipped with the baffle, the inside wall butt of baffle and lifter, compression spring's one end welds on the baffle, compression spring's the other end and the inside wall butt of lifter, set up two at least confession button piece male first locking holes in the mounting panel.

Through adopting above-mentioned technical scheme, when the cabinet is accomodate in needs removal, press the button piece, when button piece compression spring breaks away from the first locking hole of mounting panel upside simultaneously, the pulling pulley makes the pulley move down and stretches out recess and ground butt, makes the button piece insert the first locking hole of mounting panel downside under compression spring's effect in, locks the lifter, when removing the cabinet of accomodating, need not to lift the cabinet body and can remove the cabinet of accomodating, has further reduced porter's intensity of labour.

The present invention may be further configured in a preferred embodiment as: the locking subassembly is including inlaying the spring of jumping beans of locating in the lifter, the second interlude hole has been seted up to one side that the lifter is close to the mounting panel, jump beans on the spring of jumping beans wear to locate in the second interlude hole and slide with the second interlude hole and be connected, set up the second locking hole that the beans of jumping of two at least confession spring of jumping beans inserted the joint on the mounting panel.

Through adopting above-mentioned technical scheme, when needs remove accomodate the cabinet, press the jump beans on the jump bean spring, make the jump beans break away from the second locking hole of mounting panel upside, pulling pulley makes the pulley move down and stretches out recess and ground butt, and the jump beans inserts in the second locking hole of mounting panel downside under the effect of jump bean spring, locks the lifter, when removing accomodate the cabinet, need not to lift the cabinet body and can remove accomodate the cabinet, further reduced porter's intensity of labour.

The present invention may be further configured in a preferred embodiment as: the locking subassembly is still including wearing to locate the bean-jumping button in the second locking hole, integrative locating the bean-jumping button on stopper and the cover that is close to lifter one end locate the reset spring on the bean-jumping, the mounting panel is close to one side of lifter and has still seted up the sliding hole, the sliding hole communicates with each other with second locking hole, it closes the ring to inlay to be equipped with a lid in the sliding hole, lid closes ring fixed connection on the inner wall that the sliding hole is close to lifter one side, the bean-jumping wears to locate the lid and closes the ring intra-annular, the stopper inlays to locate in the sliding hole and slides with the sliding hole and is connected, reset spring inlays to locate in the sliding hole, reset spring's one end and stopper butt, reset spring's the other end and lid close the ring butt, the bean-jumping wears to locate in proper order on second interlude hole, lid and reset spring and with the stopper butt.

Through adopting above-mentioned technical scheme, when needs order about the beans that jump of jumping the beans spring and break away from second locking hole, only need press the beans button that jumps to press the beans that jump on the beans spring, need not to relieve the locking of jumping the beans spring to the lifter with the help of other instruments, easy operation is convenient, implements more easily.

To sum up, the utility model discloses a following at least one useful technological effect:

1. when the storage cabinet is moved, the storage cabinet does not need to be integrally lifted, the movement is convenient and labor-saving, and the labor intensity of carrying personnel is reduced;

2. when the storage cabinet does not need to be moved, the supporting legs can be abutted against the ground, so that the storage cabinet is not easy to move;

3. the arrangement of the upper handle facilitates users to hold the cover plate when the cover plate is opened, so that the cover plate is pulled, and the opening efficiency of the cover plate is improved.

Drawings

Fig. 1 is a schematic structural diagram of a movable storage cabinet according to a first embodiment.

Fig. 2 is a rear view of the cover plate of the first embodiment.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a schematic partial exploded view of the mounting plate, the lifting rod and the cabinet according to the first embodiment.

Fig. 5 is an enlarged view of a portion B in fig. 4.

Fig. 6 is a plan view of the cabinet of the second embodiment.

Fig. 7 is a sectional view taken along line C-C in fig. 6.

Fig. 8 is an enlarged view of a portion D in fig. 7.

Fig. 9 is a schematic structural view of a conventional storage cabinet.

In the figure, 1, a cabinet body; 11. a support leg; 12. a placement groove; 13. mounting a plate; 131. a first locking hole; 132. a second locking hole; 133. a sliding hole; 134. covering the circular ring; 14. a groove; 15. a movable groove; 16. a receiving cavity; 2. a cover plate; 21. a through hole; 22. reinforcing ribs; 3. a universal wheel; 4. a side handle; 5. a gas spring; 6. a pulley; 61. a lifting rod; 611. a first through hole; 612. a second through hole; 62. a locking assembly; 621. a compression spring; 622. a button block; 623. a baffle plate; 624. a bean jumping spring; 625. jumping beans; 626. a return spring; 627. a bean jumping button; 628. a limiting block; 7. an upper handle; 71. and (4) bolts.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

referring to fig. 1, the movable storage cabinet disclosed in this embodiment includes a cabinet body 1, a cover plate 2 disposed on the cabinet body 1, and support legs 11 integrally disposed on the lower side of the cabinet body 1 and disposed on the lower side of the cabinet body 1, the cabinet body 1 has a storage cavity 16, an opening of the storage cavity 16 is disposed upward, the number of the support legs 11 is two, the two support legs 11 are disposed at two corners of the same side of the cabinet body 1 in a one-to-one correspondence manner, the number of the universal wheels 3 is two, and the universal wheels 3 are disposed on the same side of the cabinet body 1 away; when the storage cabinet is moved, the storage cabinet can be moved only by lifting the support legs 11 to separate the support legs 11 from the ground and then pushing one side of the cabinet body 1 close to the support legs 11; the cover plate 2 is arranged on the upper side of the cabinet body 1 and hinged to one side wall of the cabinet body 1 so as to cover the containing cavity 16 of the cabinet body 1, the cover plate 2 is provided with at least one gas spring 5 on one side close to the cabinet body 1, the number of the gas springs 5 is preferably two, one end of each of the two gas springs 5 is hinged to the cover plate 2, and the other end of each of the two gas springs 5 is hinged to the two opposite side walls of the cabinet body 1; one side of the cover plate 2 close to the cabinet body 1 is also provided with reinforcing ribs 22, and the reinforcing ribs 22 are arranged in a criss-cross manner, so that the cover plate 2 is firmer; the apron 2 is kept away from the cabinet body 1 and is kept away from articulated one side and install handle 7, goes up handle 7 and supplies the user to grip to make things convenient for the user to exert the pulling force to apron 2, open apron 2.

Referring to fig. 2 and 3, two bolts 71 are mounted on the upper handle 7, the cover plate 2 is provided with through holes 21 corresponding to the bolts 71, and the bolts 71 penetrate through the through holes 21 from one side of the cover plate 2 close to the cabinet 1 to be in threaded connection with the upper handle 7, so as to fix the upper handle 7 on the cover plate 2.

Referring to fig. 4 and 5, a placing groove 12 is opened on one side of the cabinet body 1 close to the supporting legs 11, a side handle 4 is hinged in the placing groove 12, and when the cabinet body is not used, the side handle 4 can be completely placed in the placing groove 12.

The cabinet body 1 is close to one side of landing leg 11 and has seted up recess 14, recess 14 runs through the diapire of the cabinet body 1 and the lateral wall that is close to landing leg 11 one side, the embedded pulley 6 that is equipped with of recess 14, the upside welding of pulley 6 has lifter 61, lifter 61 is the cavity setting, movable groove 15 has still been seted up to one side that the cabinet body 1 is close to landing leg 12, movable groove 15 locates recess 14 upside and communicates mutually with recess 14, lifter 61 inlays to be located in movable groove 15 and slides with movable groove 15 and be connected, movable groove 15 is close to the opening part of side handle 4 and still installs the mounting panel 13 that the lid closed movable groove 15, at least two first locking hole 131 have been seted up on the mounting panel 13, first locking hole 131 runs through mounting panel 13 and follows the length direction setting of mounting panel 13, first locking hole supplies button block 622 to insert, with locking.

Still install locking Assembly 62 on lifter 61, locking Assembly 62 is used for locking lifter 61 on mounting panel 13, locking Assembly 62 includes compression spring 621 and button piece 622, lifter 61 has seted up first break-through hole 611 on being close to the lateral wall of landing leg 11, button piece 622 wears to locate in first break-through hole 611 and slides with first break-through hole 611 and is connected, the one end that button piece 622 is close to lifter 61 has baffle 623, baffle 623 and lifter 61's inside wall butt, so that button piece 622 is difficult for the first break-through hole 611 of roll-off, compression spring 621 inlays to be located in lifter 61, compression spring 621's one end welds on baffle 623, compression spring 621's the other end and lifter 61's inside wall butt, reset with order to press button piece 622.

The implementation principle of the embodiment is as follows: when the storage cabinet needs to be moved, the button block 622 is pressed, the button block 622 is made to slide away from the first locking hole 131 on the upper side of the mounting plate 13, the pulley 6 is pulled to move downwards, when the button block 622 is aligned with the first locking hole 131 on the lower side of the mounting plate 13, the button block 622 is inserted into the first locking hole 131 on the lower side of the mounting plate 13 under the action of the compression spring 621 to lock the lifting rod 61, at the moment, the pulley 6 is in rolling contact with the ground, the supporting legs 11 are separated from the ground, and the storage cabinet can be moved only by pushing the cabinet body 1 without lifting the cabinet body 1; after the storage cabinet is moved to a destination, the button block 622 in the first locking hole 131 on the lower side of the mounting plate 13 is pressed to slide the button block 622 away from the first locking hole 131 on the lower side of the mounting plate 13, the pulley 6 is pushed to move upwards, and when the button block 622 is aligned with the first locking hole 131 on the upper side of the mounting plate 13, the button block 622 is inserted into the first locking hole 131 on the upper side of the mounting plate 13 under the action of the compression spring 621 to lock the lifting rod 13, so that the pulley 6 is not easy to slide out of the groove 14.

Example two:

the difference from the first embodiment is that: referring to fig. 6, 7, and 8, the locking assembly 62 includes a bean-jumping spring 624 embedded in the lifting rod 61, a second through hole 612 is opened on a side wall of the lifting rod 61 close to the leg 11, a bean-jumping 625 on the bean-jumping spring 624 penetrates the second through hole 612 and is connected to the second through hole 612 in a sliding manner, at least two second locking holes 132 are opened on the mounting plate 13, the second locking holes 132 penetrate the mounting plate 13, the number of the second locking holes 132 is preferably two, the two second locking holes 13 are arranged along the length direction of the mounting plate 13, and the bean-jumping 625 is inserted into the second locking holes 132 to lock the lifting rod 61.

The locking assembly further comprises a reset spring 626 and a bean jumping button 627, the bean jumping button 627 is arranged in the second locking hole 132 in a penetrating manner and is connected with the second locking hole 132 in a sliding manner, a sliding hole 133 is further formed in one side, close to the lifting rod 61, of the mounting plate 13, the sliding hole 133 is concentrically arranged with the second locking hole 132 and is communicated with the second locking hole 132, a limiting block 628 is integrally arranged on one side, close to the lifting rod 61, of the bean jumping button 627, the limiting block 628 is arranged in the sliding hole 133 in a penetrating manner and is connected with the sliding hole 133 in a sliding manner so as to limit the bean jumping button 627, and the bean jumping button 627 is not easy to slide out from one side, far away from the; a covering ring 134 is welded on one side of the mounting rod 13 close to the lifting rod 61, and the covering ring 134 and the sliding hole 133 are concentrically arranged to cover the sliding hole 133, so that the limiting block 628 is not easy to slide out of the sliding hole 133; a return spring 626 is embedded in the sliding hole 133, one end of the return spring 626 abuts against a limit block 628, the other end of the return spring 626 abuts against the covering ring 134, and the limit block 628 abuts against the jumping bean 625.

The implementation principle of the embodiment is as follows: when the storage cabinet needs to be moved, the bean jumping button 627 is pressed, the bean jumping button 627 pushes the bean jumping 625 on the bean jumping spring 624 to slide away from the sliding hole 133 on the upper side of the mounting plate 13, the pulley 6 is pulled to move downwards, when the bean jumping 625 is aligned with the sliding hole 133 on the lower side of the mounting plate 13, the bean jumping 625 is inserted into the sliding hole 133 on the lower side of the mounting plate 13 under the action of the bean jumping spring 624, the lifting rod 61 is locked, at the moment, the pulley 6 is in rolling contact with the ground, the supporting legs 11 are separated from the ground, the cabinet body 1 does not need to be lifted, and the storage cabinet can be moved only by pushing the; when the storage cabinet is moved to a destination, the bean jumping button 627 in the second locking hole 132 on the lower side of the mounting plate 13 is pressed, the bean jumping button 627 pushes the bean jumping 625 to slide away from the sliding hole 133 on the lower side of the mounting plate 13, the pulley 6 is pushed to move upwards, when the bean jumping 625 is aligned with the sliding hole 133 on the upper side of the mounting plate 13, the bean jumping 625 is inserted into the sliding hole 133 on the upper side of the mounting plate 13, the lifting rod 61 is locked, and the pulley 6 is not easy to slide out of the groove in the case of non-manual operation.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a cabinet is accomodate to movable, includes the cabinet body (1), seted up on the cabinet body (1) and accomodate chamber (16), one side of the cabinet body (1) is equipped with apron (2) that the lid closed and accomodate chamber (16), apron (2) are articulated with one side of the cabinet body (1), the downside an organic whole of the cabinet body (1) is equipped with landing leg (11), its characterized in that: the quantity of landing leg (11) is two, two the corner with one side of the cabinet body (1) is located in landing leg (11), the downside of the cabinet body (1) still is equipped with two universal wheels (3), two one side that landing leg (11) were kept away from to the cabinet body (1) is located in universal wheel (3).

2. A cabinet according to claim 1, wherein: one side that apron (2) are close to the cabinet body (1) is equipped with air spring (5), the one end and the apron (2) of air spring (5) are articulated, the other end of air spring (5) is articulated with the inside wall of the cabinet body (1).

3. A cabinet according to claim 1, wherein: the cabinet body (1) is kept away from and articulated one side is equipped with handle (7) in apron (2), penetrating hole (21) have been seted up on apron (2), be equipped with bolt (71) on apron (2), bolt (71) wear to locate in proper order on penetrating hole (21) and last handle (7) and with last handle (7) threaded connection.

4. A cabinet according to claim 1, wherein: one side of the cover plate (2) close to the cabinet body (1) is also integrally provided with a reinforcing rib (22).

5. A cabinet according to claim 1, wherein: one side of the cabinet body (1) far away from the universal wheels (3) is hinged with a side handle (4).

6. A cabinet according to claim 5, wherein: a placing groove (12) is formed in one side, far away from the universal wheels (3), of the cabinet body (1), and the side handle (4) is hinged in the placing groove (12).

7. A cabinet according to claim 1, wherein: one side, close to the supporting legs (11), of the cabinet body (1) is provided with a groove (14), the groove (14) penetrates through the bottom wall of the cabinet body (1), pulleys (6) are embedded in the groove (14), a lifting rod (61) which is arranged in a hollow mode is integrally arranged on the upper side of each pulley (6), a movable groove (15) is formed in one side, close to the supporting legs (11), of the cabinet body (1), the movable groove (15) is communicated with the groove (14), the lifting rod (61) is embedded in the movable groove (15) and connected with the movable groove (15) in a sliding mode, a mounting plate (13) which covers the movable groove (15) is further arranged on one side, close to the supporting legs (11), of the cabinet body (1), and one side wall of the lifting rod (61) is abutted to and slides against the mounting plate (;

the lifting device also comprises a locking assembly (62) which is arranged on the lifting rod (61) and is clamped with the mounting plate (13).

8. A cabinet according to claim 7, wherein: locking Assembly (62) including inlaying compression spring (621) and the button piece (622) of locating in lifter (61), first interlude hole (611) has been seted up on lifter (61) is close to the lateral wall of mounting panel (13), button piece (622) wear to locate in first interlude hole (611) and slide with first interlude hole (611) and be connected, button piece (622) are close to the one end an organic whole of lifter (61) and are equipped with baffle (623), the inside wall butt of baffle (623) and lifter (61), the one end of compression spring (621) welds on baffle (623), the other end of compression spring (621) and the inside wall butt of lifter (61), it supplies button piece (622) male first locking hole (131) to have seted up two at least in mounting panel (13).

9. A cabinet according to claim 7, wherein: locking subassembly (62) are including inlaying jumping beans spring (624) of locating in lifter (61), second interlude hole (612) have been seted up to one side that lifter (61) are close to mounting panel (13), jump beans (625) on jumping beans spring (624) wear to locate in second interlude hole (612) and slide with second interlude hole (612) and be connected, set up second locking hole (132) that beans (625) of jumping beans spring (624) of at least two confessions inserted the joint on mounting panel (13).

10. A cabinet according to claim 9, wherein: the locking assembly (62) further comprises a bean jumping button (627) arranged in the second locking hole (132) in a penetrating manner, a limit block (628) arranged at one end of the bean jumping button (627) and a reset spring (626) sleeved on the bean jumping button (625), wherein the mounting plate (13) is further provided with a sliding hole (133) at one side close to the lifting rod (61), the sliding hole (133) is communicated with the second locking hole (132), a covering ring (134) is embedded in the sliding hole (133), the covering ring (134) is fixedly connected to the inner wall of one side of the sliding hole (133) close to the lifting rod (61), the bean jumping button (625) is arranged in the covering ring (134) in a penetrating manner, the limit block (628) is embedded in the sliding hole (133) and is connected with the sliding hole (133) in a sliding manner, the reset spring (626) is embedded in the sliding hole (133), one end of the reset spring (626) is abutted against the limiting block (628), the other end of the reset spring (626) is abutted against the covering ring (134), and the jumping beans (625) sequentially penetrate through the second through hole (612), the covering ring (134) and the reset spring (626) and are abutted against the limiting block (628).