Handle lock
By employing a dual-locking-point design with a rotating motion, the locking wing achieves double locking through the rotating mounting sleeve and linkage of the locking component. This solves the problem of insufficient locking strength and load-bearing capacity in existing handle locks, ensuring a compact structure and stable locking of the locking component, and preventing the handle from shifting or being scratched inside the lock case.
Patent Information
- Application Number
- CN202520063704.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-10
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-10
AI Technical Summary
Existing handle locks have insufficient locking strength and load-bearing capacity, and the handle is prone to shifting within the handle slot, causing the handle to scrape.
The design employs a dual-locking point mechanism with a rotating action. The two locking protrusions are engaged in the locking slots on the transverse sidewalls of the recessed cavity through the rotating mounting sleeve and linkage of the locking component. Automatic locking is achieved by combining the return spring and the one-way drive ramp. The actuating component is linked to the lock cylinder seat.
It improves the locking effect of the lock, enhances the locking stability and load-bearing capacity of the lock, prevents wear on the lock case, and simplifies the operation of the locking components. It also achieves a compact structure and stable locking, and prevents the handle from shifting or being scratched inside the lock case.
Smart Images
Figure CN223675989U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a lock, in particular a handle lock. BACKGROUND
[0002] A handle lock in the prior art comprises a lock shell and a handle, the lock shell has a handle slot, a rotating shaft is installed at one end of the handle slot, a locking notch is arranged at the other end of the handle slot, one end of the handle is hingedly connected to the rotating shaft, and a lock cylinder mechanism is installed at the other end of the handle, the lock cylinder mechanism comprises a lock cylinder and a locking piece, the locking piece is locked / unlocked in cooperation with the locking notch, the locking piece is locked after the handle is buckled into the handle slot, and the handle is locked in the handle slot; in order to realize automatic retraction of the locking piece when the handle is buckled into the handle slot, the locking piece is a telescopic lock tongue which is slidingly fitted on the handle along the length direction of the handle. The handle lock can only be designed with a single locking point under the structure design of one-side linear reciprocating movement of the telescopic lock tongue, and the locking strength and the bearing capacity are insufficient. In addition, the handle of the existing lock is displaced in the handle slot, and the handle is scratched. SUMMARY
[0003] The utility model discloses a handle lock with a locking piece rotating and a double-locking-point design, which has the advantages of stable locking and large bearing capacity.
[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme.
[0005] A handle lock comprises a lock shell, a handle slot, a rotating shaft installed at one end of the handle slot, a sunken slot at the other end of the handle slot, a locking notch arranged in the sunken slot,
[0006] a handle arranged in the handle slot, one end of the handle being hingedly connected to the rotating shaft, the other end of the handle having a lock cylinder hole seat corresponding to the sunken slot,
[0007] and a lock cylinder mechanism installed on the lock cylinder hole seat, the lock cylinder of the lock cylinder mechanism being arranged to be rotatable in the lock cylinder hole seat, the bottom of the lock cylinder being connected to a driving piece, the driving piece being drivingly connected to a locking piece movably arranged at the bottom end of the lock cylinder hole seat, the locking piece having a locking position corresponding to the locking notch and an unlocking position out of the locking notch,
[0008] characterized in that the locking piece is arranged to be limited to rotate in the lock cylinder hole seat, the locking piece comprises a rotating mounting sleeve rotatingly and movably arranged in the lock cylinder hole seat, the rotating mounting sleeve being provided with a linkage part, the driving piece and the linkage part of the locking piece being drivingly connected, the outer circumferential surface of the rotating mounting sleeve being provided with two locking wings arranged oppositely, and the two locking notches corresponding to the two locking wings are arranged on the two side walls of the sunken slot corresponding to the width direction of the handle slot.
[0009] Preferably, the toggle member is provided with a pushing portion, the pushing portion is in pushing cooperation with the linkage portion to form the driving connection between the toggle member and the locking member, the rotating mounting sleeve is in relative rotation cooperation with the toggle member, the locking member is provided with a return spring acting between the lock cylinder hole seat and the locking member to drive the locking member into the locking position, the locking member has a self-adaptive stroke to rotate against the spring force of the return spring and away from the pushing portion of the linkage portion, the locking lug bottom is provided with a one-way driving slope, when the one-way driving slope is pressed against the handle groove cavity opening edge, the locking member in the locking position is forced to rotate into the self-adaptive stroke until the locking member is inserted into the sunken groove cavity, the locking slot is a strip-shaped slot recessed on the wall of the sunken groove cavity and extending along the length direction of the handle groove cavity.
[0010] Preferably, the locking lug has a locking position limiting end, the locking position limiting end is in abutment with the wall of the locking slot to limit the locking lug from continuing to rotate beyond the locking position after entering the locking position from the unlocking position.
[0011] Preferably, the toggle member includes a central connecting portion, the central connecting portion is fixedly connected to the lock cylinder, the rotating mounting sleeve is sleeved on the central connecting portion, a limiting end is arranged at one end of the central connecting portion, the lock cylinder hole seat has an axial limiting end face, the axial limiting end face is in corresponding cooperation with the limiting end to form a positioning interval, the rotating mounting sleeve of the locking member is arranged in the positioning interval.
[0012] Preferably, the linkage portion is arranged on the inner hole wall of the rotating mounting sleeve, and the pushing portion and the return spring are arranged in the inner hole of the rotating mounting sleeve.
[0013] Preferably, the inner hole wall of the rotating mounting sleeve is radially provided with a convex portion extending in the circumferential direction, the radial end of the convex portion surrounds a positioning hole, and the circumferential direction has a broken interval, the central connecting portion has a rotating positioning wall in positioning cooperation with the positioning hole, the pushing portion is a protruding block on the rotating positioning wall, the protruding block is inserted into the broken interval in the axial direction of the rotating mounting sleeve, the convex portion forms a pushing wall after being broken through the broken interval, and the pushing wall forms the linkage portion, and the broken interval provides a movement space for the relative rotation of the locking member and the pushing portion during the self-adaptive stroke rotation.
[0014] Preferably, the return spring is a torsion spring, the spring ring of the torsion spring is arranged in the axial direction of the rotating mounting sleeve, spring arm insertion holes are arranged in the axial direction on the convex portion and the axial limiting end face of the lock cylinder mounting seat, one end arm of the return spring is inserted into the spring arm insertion hole of the convex portion, and the other end arm of the return spring is inserted into the spring arm insertion hole of the axial limiting end face.
[0015] Preferably, the lock core bottom protrusion has a square plug, the square plug is provided with a threaded connection hole, the center connecting part has a square plug hole, the square plug hole penetrates the limiting end, and a countersunk hole is formed on the limiting end to connect the square plug hole, the actuating member is sleeved on the square plug through the square plug hole, and a locking screw is inserted into the countersunk hole and screwed into the threaded connection hole, and the head of the locking screw is arranged in the countersunk hole.
[0016] Preferably, the handle is provided with a downwardly protruding anti-pressing corner on each of the two lateral sides of the articulated end, the rotating shaft comprises a shaft body which is fixedly arranged on the lock shell, an upper end of the shaft body is formed with a disc-shaped part, the disc-shaped part is protruded with an open ring-shaped articulated head, the articulated end of the handle is arranged in a cavity surrounded by the articulated head and is articulated on the articulated head, a positioning recess is recessed in a bottom wall of the handle groove cavity, and the disc-shaped part is provided with a avoiding through hole corresponding to the position of the anti-pressing corner, the avoiding through hole is out of position with the positioning recess when the handle is out of position with the handle groove cavity, and the avoiding through hole corresponds to the position of the positioning recess when the handle is rotated to a position aligned with the handle groove cavity, and the anti-pressing corner can be buckled into the positioning recess when the handle is buckled into the handle groove cavity.
[0017] By adopting the above technical scheme, the locking member is rotatable, two locking protruding wings can be designed on the locking member, the locking protruding wings can be clamped into the locking grooves on the two lateral walls of the sunken groove cavity through the rotation of the locking member, the lock core is symmetrically locked on both sides, and the locking is stable and has large bearing capacity; the locking grooves are arranged on the lateral walls of the sunken groove cavity in the transverse direction (the width direction of the handle groove cavity), so that the structure of the locking member is compact, and the locking is stable and reliable. Further, in the process that the handle is directly buckled into the handle groove cavity, the driving slope at the bottom of the locking protruding wing touches the edge of the handle groove cavity, the handle is pressed into the handle groove cavity, the locking member rotates in the self-adapting stroke under the action of the one-way driving slope under the external force formed in the process that the handle is continuously pressed into the handle groove cavity, then the locking member enters the handle groove cavity, and when the locking member reaches the position of the locking groove, the locking member is buckled into the locking groove under the driving of the reset spring and enters the locking position, so that the handle is automatically locked when being pressed down, and the operation is simple and convenient; in addition, the lock core mechanism of the lock has the advantages of simple and compact structure and reliable action.
[0018] The utility model will be further described in connection with the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is the handle pop-up state diagram of the utility model handle lock;
[0020] Figure 2 It is the handle closed state diagram of the utility model handle lock;
[0021] Figure 3 For Figure 2 Sectional view along A-A section of
[0022] Figure 4 For Figure 2 Sectional view along B-B section of
[0023] Figure 5 For the utility model lock and the cooperation state diagram of the locking piece and the poking piece;
[0024] Figure 6 For the utility model handle lock's explosion view;
[0025] Figure 7 For the utility model handle lock's lock cylinder mechanism explosion view. DETAILED DESCRIPTION
[0026] Referring to the accompanying Figures 1-7 The utility model discloses a handle lock, including lock shell 1, handle 2 and lock cylinder mechanism, lock shell 1 has handle slot cavity 11, handle slot cavity 11 one end is installed with the pivot 3, handle slot cavity 11 other end is equipped with the subsided slot cavity 111, and the subsided slot cavity 111 is equipped with locking notch 112;Handle 2 is configured in handle slot cavity 11, and handle 2 one end is hinged on pivot 3, and handle 2 other end has the lock cylinder hole seat 21 corresponding with the subsided slot cavity 111 cooperation;Lock cylinder mechanism is installed on lock cylinder hole seat 21, and the lock cylinder 4 of lock cylinder mechanism is configured as rotatable setting in lock cylinder hole seat 21, and the bottom of lock cylinder 4 is connected with the poking piece 5, and the poking piece 5 is driven to be connected with the locking piece 6 of active configuration on the bottom end on lock cylinder hole seat 21, and the locking piece 6 has the locking position of locking cooperation with locking notch 112 and the unlocking position of unlocking that the locking notch 112 is taken out, and the locking piece 6 is configured as being limited to rotate on lock cylinder hole seat 21, and the locking piece 6 includes the rotation mounting sleeve 61 of rotation dynamic cooperation in lock cylinder hole seat 21, and the rotation mounting sleeve 61 is equipped with linkage 62, and the linkage 62 of poking piece 5 and locking piece 6 is driven to be connected, so that lock cylinder 4 rotates and drives the locking piece 6 to reciprocate rotation between locking position and unlocking position through poking piece 5, and the outer circumferential surface of rotation mounting sleeve 61 is protruded with two locking wings 63 that are oppositely arranged, and the locking notch 112 corresponding cooperation with two locking wings 63 is set up on the two side walls of the subsided slot cavity 111 corresponding handle slot cavity 11 width direction X.The locking wing is inserted into the locking notch in the lateral two side walls of the subsided slot cavity with the rotation of the locking piece, and the lock cylinder both sides symmetrical lock, has the advantages such as locking stable, and carrying capacity big.
[0027] In order to realize the handle touch type locking, the push part 51 is arranged on the toggle piece 5, the push part 51 is in push fitting with the linkage part 62, so as to form the driving connection of the toggle piece 5 and the locking piece 6, the rotary mounting sleeve 61 is in relative rotary fitting with the toggle piece 5, the locking piece 6 is matched with the reset spring 7 which is used for driving the locking piece 6 to enter the locking position between the lock cylinder hole seat 21 and the locking piece 6, the locking piece 6 has the self-adaptive stroke which is rotated to the direction of separating the push part 51 of the linkage part 62 and overcoming the spring force of the reset spring 7, the bottom of the locking lug 63 is provided with the one-way driving slope 631, when the one-way driving slope 631 is pressed on the edge of the handle groove cavity 11, the locking piece 6 in the locking position is forced to rotate in the self-adaptive stroke until the locking piece 6 is inserted into the sunken groove cavity 111, the locking slot 112 is the strip-shaped groove which is recessed on the wall of the sunken groove cavity 111 and extends along the length direction of the handle groove cavity 11. After the force of rotating the lock cylinder 4 is removed, the locking piece 6 is rotated to the locking position under the driving of the reset spring 7, during the process of buckling the handle 2 into the handle groove cavity 11, the one-way driving slope 631 of the locking piece 6 touches the edge of the handle groove cavity 1, the handle 2 is continuously buckled into the handle groove cavity 11, the one-way driving slope 631 is pressed through the edge of the handle groove cavity 11, under the action of the one-way driving slope 631, the locking piece 6 is forced to rotate in the self-adaptive stroke until the locking piece 6 enters the handle groove cavity 11, after the handle 2 is buckled into the handle groove cavity 11 in place, the locking lug 63 of the locking piece 6 corresponds to the position of the locking slot 112, the locking lug 63 loses the limitation of the wall of the handle groove cavity 11, the locking piece 6 is rotated to the locking position under the spring force of the reset spring 7, and the locking is completed. Thus, the person skilled in the art can think that the locking piece can also be in synchronous action with the lock cylinder, when the handle locking operation is performed, the locking piece is rotated to the unlocking position by rotating the lock cylinder, after the handle is buckled in place, the lock cylinder is rotated to complete the locking, but there is the defect of inconvenient operation. Under the guidance of the utility model, the person skilled in the art can obtain the parameters such as the inclination angle of the one-way driving slope by combining the prior art and the conventional experiment, therefore, the above is not repeated.
[0028] In the embodiment, the locking lug 63 has the locking position limiting end 632 which is in abutment with the wall of the locking slot 112, so as to limit the locking lug 63 from continuously rotating after breaking through the locking position from the unlocking position. In this way, when the handle is locked in the handle groove cavity, the lock cylinder can only be reversely rotated for unlocking operation, which is convenient for unlocking operation.
[0029] In order to make the locking piece cooperate with the compact structure of the knob piece, and work stably and reliably, the following optimization design is adopted, specifically: the knob piece 5 comprises a center connecting part 52 fixedly connected to the lock cylinder 4, the rotating mounting sleeve 61 is sleeved outside the center connecting part 52, a limiting end 53 is arranged at one end of the center connecting part 52, the lock cylinder hole seat 21 has an axial limiting end face 211, the axial limiting end face 211 is correspondingly matched with the limiting end 53 to form a positioning interval, and the rotating mounting sleeve 61 of the locking piece 6 is mounted in the positioning interval. Under the design, after the knob piece is connected to the lock cylinder, the limiting end of the knob piece realizes the axial limiting of the rotating mounting sleeve, the overall structure is compact, and assembly is convenient. The linkage part 62 is arranged on the inner ring hole wall of the rotating mounting sleeve 61, and the push part 51 and the return spring 7 are arranged in the inner ring hole of the rotating mounting sleeve 61; the matched structures, such as the push part and the return spring, are arranged in the rotating mounting sleeve, and the structure is simple and compact. Therefore, under the guidance of the utility model, corresponding variant structure designs can also be made, for example, the locking piece can be rotatably arranged on the lock cylinder hole seat, and a positioning member can also be arranged on the lock cylinder hole seat; or the linkage part is arranged on the outside of the rotating mounting sleeve, and the like.
[0030] Wherein, the inner ring hole wall of the rotating mounting sleeve 61 is radially protruded with a convex part 611 extending in the circumferential direction, the radial end part of the convex part 611 surrounds a positioning hole 6111, and the circumferential direction has a disconnected interval 6112, the center connecting part 52 has a rotating positioning wall 521 matched with the positioning hole 6111, the push part 51 is a convex block protruded on the rotating positioning wall 521, the convex block is axially inserted into the disconnected interval 6112 of the rotating mounting sleeve 61, the convex part 611 forms a push wall after being disconnected through the disconnected interval 6112, the push wall constitutes the linkage part 62, and the disconnected interval 6112 provides a relative rotating movement space of the push part 51 when the locking piece rotates in the self-adaptive stroke, that is, the push part 51 moves in the disconnected interval 6112 when the locking piece 6 rotates in the self-adaptive stroke, the rotating positioning of the locking piece is realized through the knob piece, and the convex part 611 used for the rotating positioning of the locking piece simultaneously forms the push wall for the knob piece, and the overall structure is simple and compact.
[0031] Further, the return spring 7 is a torsion spring, the spring ring of the torsion spring is arranged in the axial direction of the rotating mounting sleeve 61, the spring arm insertion holes 6113 and 2111 are arranged in the axial direction on the convex part 611 and the axial limiting end face 211 of the lock cylinder mounting seat 21, one end arm of the return spring 7 is inserted into the spring arm insertion hole 6113 of the convex part 611, and the other end arm of the return spring 7 is inserted into the spring arm insertion hole 2111 of the axial limiting end face 211; assembly is convenient, the structure is compact, and work is reliable. As the return spring driving the locking piece to act, the return spring can also be a compression spring design, but there is a defect of inconvenient assembly arrangement.
[0032] In order to realize the convenient and reliable connection of the knob to the lock cylinder, a square plug 41 is protruded at the bottom of the lock cylinder 4, the square plug 41 is provided with a threaded connection hole, the center connecting part 52 is provided with a square plug hole, the square plug hole penetrates the limiting end 53, and the counterbore hole 531 connecting the square plug hole is formed on the limiting end 53, the knob 5 is sleeved on the square plug 41 through the square plug hole, the lock screw 8 is inserted into the counterbore hole 531 and is screwed in the threaded connection hole, and the head of the lock screw 8 is arranged in the counterbore hole. In this way, the positioning and installation of the knob and the lock cylinder are convenient, the lock cylinder and the knob are fixed firmly and reliably, and the assembly structure is simple and convenient.
[0033] In order to solve the problem that the handle is pressed accidentally and the handle and the lock shell collide and scratch the paint surface when the handle is not locked in place, the hinged end of the handle 2 is protruded downward on both sides in the transverse direction and is provided with a downward pressing prevention corner 22, the rotating shaft 3 includes a shaft body 31 which is positioned and installed on the lock shell 1, the upper end of the shaft body 31 is formed with a disc-shaped part 32, the disc-shaped part 32 is protruded with an open ring-shaped hinge 33, the hinged end of the handle 2 is arranged in the cavity surrounded by the hinge 33 and is hinged to the hinge 33, the bottom wall of the handle groove cavity 11 is recessed with a positioning recess 113, the disc-shaped part 32 is provided with an avoiding through hole 321 which corresponds to the position of the downward pressing prevention corner 22, the avoiding through hole 321 is dislocated with the positioning recess 113 when the handle 2 is dislocated with the handle groove cavity 11, when the handle 2 is rotated with the rotating shaft 3 to the position aligned with the handle groove cavity 11, the avoiding through hole 321 corresponds to the position of the positioning recess 113, and the downward pressing prevention corner 22 can be buckled into the positioning recess 113 when the handle 2 is buckled into the handle groove cavity 11. The disc-shaped part is protruded with an open ring-shaped hinge, which can realize the surrounding protection of the handle end, and the hinged end of the handle is provided with a downward pressing prevention corner, when the handle is dislocated with the handle groove cavity, the avoiding through hole of the disc-shaped part is dislocated with the positioning recess, the downward pressing prevention corner is limited by the bottom wall of the handle groove cavity, and the handle cannot be pressed downward, only when the handle is aligned with the handle groove cavity, the avoiding through hole of the disc-shaped part corresponds to the position of the positioning recess, the downward pressing prevention corner can pass through the avoiding through hole and enter the positioning recess to form an avoiding, and the handle can be pressed downward into the handle groove cavity.
Claims
1. A handle lock, comprising a lock housing having a handle slot, a rotating shaft installed at one end of the handle slot, a sunken slot provided at the other end of the handle slot, and a locking notch provided in the sunken slot, a handle arranged in the handle slot, one end of the handle being hingedly connected to the rotating shaft, and the other end of the handle having a lock core hole seat corresponding to the sunken slot, and a lock core mechanism installed on the lock core hole seat, the lock core of the lock core mechanism being arranged rotatably in the lock core hole seat, the bottom of the lock core being connected to a pusher, the pusher being drivingly connected to a locking member movably arranged at the bottom end of the lock core hole seat, the locking member having a locking position corresponding to the locking notch and an unlocking position out of the locking notch to complete unlocking, characterized in that the locking member being arranged to be limited to rotate in the lock core hole seat, the locking member comprising a rotating installation sleeve rotatably installed in the lock core hole seat, the rotating installation sleeve being provided with a linkage portion, the pusher being drivingly connected to the linkage portion of the locking member, the outer circumferential surface of the rotating installation sleeve being provided with two locking lugs arranged oppositely, and the two side walls of the sunken slot corresponding to the width direction of the handle slot being provided with the locking notch corresponding to the two locking lugs.
2. The handle lock of claim 1, wherein: the pusher being provided with a pushing portion, the pushing portion being in pushing cooperation with the linkage portion to form the driving connection between the pusher and the locking member, the rotating installation sleeve being rotatably cooperated with the pusher, the locking member being provided with a return spring acting between the lock core hole seat and the locking member to drive the locking member into the locking position, the locking member having a self-adaptive stroke rotating to the direction of the linkage portion away from the pushing portion against the spring force of the return spring, the bottom of the locking lug being provided with a one-way driving slope, the one-way driving slope forcing the locking member in the locking position to rotate in the self-adaptive stroke when being pressed on the edge of the handle slot, until the locking member is inserted into the sunken slot, and the locking notch being a strip-shaped slot recessed on the wall of the sunken slot and extending along the length direction of the handle slot.
3. The handle lock of claim 2, wherein: the locking lug having a locking position limiting end portion abutting against the wall of the locking notch to limit the locking lug from continuing to rotate beyond the locking position after entering the locking position from the unlocking position.
4. The handle lock of claim 2, wherein: the pusher comprising a central connecting portion fixedly connected to the lock core, the rotating installation sleeve being sleeved on the central connecting portion, a limiting end head being provided at one end of the central connecting portion, the lock core hole seat having an axial limiting end face corresponding to the limiting end head to form a positioning interval, and the rotating installation sleeve of the locking member being installed in the positioning interval.
5. The handle lock of claim 4, wherein: the linkage portion being provided on the inner hole wall of the rotating installation sleeve, and the pusher and the return spring being arranged in the inner hole of the rotating installation sleeve.
6. The handle lock of claim 5, wherein: the inner hole wall of the rotating installation sleeve being radially provided with a protruding portion extending in the circumferential direction, the radial end portion of the protruding portion surrounding a positioning hole, and the circumferential direction having a broken interval, the central connecting portion having a rotating positioning wall positioned in cooperation with the positioning hole, the pusher being a protruding block on the rotating positioning wall, the protruding block being axially inserted into the broken interval of the rotating installation sleeve, the protruding portion being broken through the broken interval to form a pushing wall, the pushing wall constituting the linkage portion, and the broken interval providing a movement space for the locking member to rotate relative to the pusher in the self-adaptive stroke.
7. The handle lock of claim 6, wherein: The reset spring is a torsion spring, the spring coil of the torsion spring is arranged axially along the rotating mounting sleeve, spring arm insertion holes are arranged axially on the axial limiting end faces of the convex portion and the lock cylinder mounting base, one end arm of the reset spring is inserted into the spring arm insertion hole of the convex portion, and the other end arm of the reset spring is inserted into the spring arm insertion hole of the axial limiting end face.
8. The handle lock of claim 4 or 5 or 6 or 7, wherein: The lock cylinder bottom is provided with a square insertion head, the square insertion head is provided with a threaded connection hole, the center connecting portion is provided with a square insertion hole, the square insertion hole penetrates the limiting end head, and a counterbore orifice connecting the square insertion hole is formed on the limiting end head, the driving member is sleeved on the square insertion head through the square insertion hole, a locking screw is inserted into the counterbore orifice and screwed in the threaded connection hole, and the head of the locking screw is arranged in the counterbore orifice.
9. The handle lock of claim 1, wherein: The articulated end of the handle is provided with an anti-downward pressing corner downwardly on both sides in the transverse direction, the rotating shaft comprises a shaft body which is positioned and mounted on the lock shell, a disc-shaped portion is formed on the upper end of the shaft body, an open ring-shaped articulated head is protruded on the disc-shaped portion, the articulated end of the handle is arranged in the cavity surrounded by the articulated head and articulated on the articulated head, a positioning recess is concavely arranged on the bottom wall of the handle groove cavity, an avoiding through hole corresponding to the position of the anti-downward pressing corner is arranged on the disc-shaped portion, the avoiding through hole is out of position with the positioning recess when the handle is out of position with the handle groove cavity, the avoiding through hole corresponds to the position of the positioning recess when the handle carrying the rotating shaft is rotated to the position aligned with the handle groove cavity, and the anti-downward pressing corner can be buckled into the positioning recess when the handle is buckled into the handle groove cavity.