CN218644053U - Door handle - Google Patents

Abstract

The utility model belongs to the technical field of the door handle, especially, relate to a door handle, include: the handle comprises a handle, a rotating core and a connecting cylinder; one end of the rotating shaft is provided with a lock cylinder, and the other end of the rotating shaft is fixedly connected with the handle; the mounting seat is arranged at the joint of the handle and the rotating shaft; the first reset device comprises a reset rotary disc and a first torsion spring, the reset rotary disc is fixedly arranged on the end part of the connecting cylinder, the first torsion spring is sleeved on the connecting cylinder, and the reset rotary disc is provided with a first limiting block; the second reset device comprises a gasket and a second torsion spring, the gasket is arranged on the rotating shaft, and a second limiting block is arranged on the peripheral side of the gasket; the first reset device and the second reset device are both positioned in the mounting seat; the utility model discloses beneficial effect does: after the handle rotates to drive the lock core to rotate to realize that the lock is opened and closed, the resilience force through the second torsional spring and the first torsional spring in the dual resetting means can let the handle get back to the initial position fast, has improved the practicality of door handle.

Description

Door handle

Technical Field

The utility model belongs to the technical field of the door handle, especially, relate to a door handle.

Background

Door handles are common items designed on doors for controlling the opening and closing of door locks.

In prior art, the handle of lock is generally simple to be fixed to the lock panel with jump ring and spring, can't accomplish the precision fit, and the handle is not hard up easily during the use, can't convolute smoothly and resets, gives other people not firm sensation, and the nut can not lock when installing the handle, and the handle can't rotate after locking.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the technical problem who exists to the aforesaid, provide a door handle, reached the effect that can reset fast after the handle rotates.

In view of this, the utility model provides a door handle, a serial communication port, include:

the handle comprises a handle, a rotating core and a connecting cylinder, the connecting cylinder is arranged on the handle, and the rotating core is arranged in the handle;

one end of the rotating shaft is provided with a lock cylinder, and the other end of the rotating shaft is fixedly connected with the handle;

the mounting seat is arranged at the joint of the handle and the rotating shaft;

the first reset device comprises a reset rotary disc and a first torsion spring, the reset rotary disc is fixedly mounted on the end part of the connecting cylinder, the first torsion spring is sleeved on the connecting cylinder, a first limiting block is arranged on the reset rotary disc, and two ends of the first torsion spring are arranged on two sides of the first limiting block;

the second reset device comprises a gasket and a second torsion spring, the gasket is arranged on the rotating shaft, a second limiting block is arranged on the peripheral side of the gasket, and two ends of the second torsion spring are arranged on two sides of the second limiting block;

wherein, first resetting means and second resetting means all are located the mount pad.

In the technical scheme, the door handle is fixedly installed on a door through an installation seat, the handle is connected with a rotating shaft, the rotating shaft is connected with a lock cylinder, a connecting cylinder of the handle is fixedly connected with a reset rotary disc in the installation seat, a first torsion spring is sleeved on the connecting cylinder of the handle and fixedly arranged between the reset rotary disc and a shell, an extension section is arranged on the peripheral side of the reset rotary disc, a first limiting block is positioned on the extension section, the handle is rotated, the connecting cylinder drives the reset rotary disc to rotate, the reset rotary disc rotates to drive the first limiting block and one end of the first torsion spring to be in touch extrusion, and the other end of the first torsion spring is limited and fixed by the installation seat, so that the first limiting block can push the first torsion spring to expand and deform to generate resilience force, when the handle stops rotating, the resilience force of the first torsion spring can push the reset rotary disc to rotate to the original position, and further drive the handle to rotate to the original position, and reset effect is achieved;

the gasket is arranged on the rotating shaft and is clamped and fixed with the rotating shaft, when the handle rotates to drive the rotating shaft to rotate, the gasket also rotates, the second limiting block on the gasket can be in contact extrusion with one end of the second torsion spring, and the other end of the second torsion spring is limited and fixed by the mounting rod, so that the second limiting block pushes the second torsion spring to expand and deform to generate resilience force;

be equipped with the key hole on hand, insert in the key hole when the key, promote to rotate the core and make the handle can be fixed with the pivot joint, it can drive the pivot and the carousel that resets to rotate the handle after fixed with the pivot joint, it is first, the second torsional spring all produces elasticity and promotes the handle and reset, when not having the key to insert the key hole, the handle rotates and can only drive the carousel that resets and rotate, at this moment, the rotation of handle can only realize idle running, can not play control to the lock core, then realize resetting to the handle through first torsional spring, the lock door effect of door handle has been realized to this design, the practicality of door handle has been improved.

In the above technical scheme, further, its characterized in that is equipped with connecting block and spring in the connecting cylinder, the pivot is connected to the one end of connecting block, and the rotation core is connected to the other end, and the spring is located between connecting block and the pivot.

In the technical scheme, a first clamping key is arranged at one end, connected with a rotating shaft, of a connecting block, a first clamping groove is arranged on the end face, connected with the connecting block, of the rotating shaft, a second clamping groove is arranged at one end, connected with a rotating core, of the connecting block, a second clamping key is arranged on the rotating core, when a key is inserted into a key opening of a handle, the second clamping key on the rotating core is pushed to be inserted into the second clamping groove, then the connecting block is pushed, so that the first clamping key is clamped with the first clamping groove, and then the rotating shaft can be driven to rotate by rotating the handle; the end face of the connecting block, which is connected with the rotating shaft, is provided with an annular groove, the spring is arranged in the annular groove, and two ends of the spring are respectively contacted with the connecting block and the rotating shaft; utilize the key to promote the rotation core to indirectly promote connecting block and pivot joint drive lock core and rotate, realize inserting the function that the key opened the door, extract the key after, the elasticity of spring can promote the connecting block and keep away from the function that the pivot realized extracting the key lock door, has improved the practicality of door handle effectively.

In the above technical solution, it is further characterized in that the mount pad includes a housing, a mounting plate, a mounting rod and a mounting cylinder, the mounting plate is disposed on the rotating shaft and fixedly connected with the housing, the mounting cylinder is disposed on the inner wall of the housing, and the mounting rod passes through the mounting plate and fixedly connected with the mounting cylinder.

In this technical scheme, the installation pole is the threaded rod, and the installation section of thick bamboo is a screw section of thick bamboo and structure as an organic whole with the shell, and the helicitic texture and the installation section of thick bamboo looks adaptation of installation pole, installation pole pass door and installation section of thick bamboo screw thread fixed connection for the door handle can be firm install on the door, improved the installation fastness of door handle.

In the above technical solution, it is further characterized in that the reset rotary disc is provided with a hollow structure, and the end of the connecting cylinder is provided with a hook-shaped protrusion.

In this technical scheme, be equipped with hollow out construction on the carousel that resets, and the connecting cylinder passes the hollow out construction that resets the carousel, the hook-like arch of connecting cylinder is connected with the carousel joint that resets, utilizes the hollow out construction that resets the carousel and the hook-like arch of connecting cylinder to make the carousel that resets can be fixed in the tip of connecting cylinder, and simple structure, the firm in connection of connecting cylinder and the carousel that resets have improved the practicality of door handle effectively.

In the above technical solution, it is further characterized in that a limiting plate is provided on the reset turntable.

In this technical scheme, be equipped with the limiting plate on the carousel that resets, rotate when the handle and drive the carousel that resets and rotate, when the turned angle of handle is too big, limiting plate on the carousel that resets can contradict with the installation pole that passes the mounting panel, does not let the carousel that resets continue to rotate to the rotation range of restriction handle also produces the guard action to the torsional spring, prevents that torsional spring deformation degree is too big, can't recover, has improved the practicality of handle effectively.

In above-mentioned technical scheme, it is further, characterized in that, the connecting block includes that first commentaries on classics piece and second change the piece, and first commentaries on classics piece and second change the mutual joint of piece, are equipped with protruding and the spacing slider of V type on the first commentaries on classics piece, are equipped with the recess with the protruding looks adaptation of V type on the second commentaries on classics piece.

In the technical scheme, the connecting block is composed of a first rotating block and a second rotating block, the two ends of the first rotating block are respectively connected with a rotating shaft and the second rotating block, the two ends of the second rotating block are respectively connected with the first rotating block and a rotating core, a V-shaped bulge is arranged on the first rotating block, a groove matched with the first rotating block is formed in the second rotating block, the first rotating block is connected with the second rotating block in a clamped mode, a certain gap exists between the first rotating block and the second rotating block, when the rotating core pushes the first rotating block and the second rotating block in a clamped mode, then the handle rotates to drive the second rotating block to rotate, the first rotating block can be driven to rotate by rotation of the second rotating block, the connecting cylinder can also rotate by rotation of a limiting sliding block of the first rotating block, the connecting block is set to be of a two-section structure, force transmission is improved, the handle is enabled to be more labor-saving, and practicability of the door handle is effectively improved.

The utility model has the advantages that:

1. be equipped with dual resetting means in the handle, rotate at the handle and drive the lock core and rotate and realize the lock and open and close the back, can let the handle get back to initial position fast through the resilience force of the second torsional spring among the dual resetting means and first torsional spring, improved the practicality of door handle.

2. Be equipped with the limiting plate on the carousel that resets, can prevent that handle turned angle is too big, cause the damage to the torsional spring, increased the life of door handle, improved the durability.

3. Be equipped with the spring between the connecting block and the pivot of handle, when no key inserts, the spring can push away the connecting block from the pivot, and connecting block and pivot break away from the joint, and the handle rotates and also can not drive the lock core and rotate, plays the lock door effect, has improved the practicality of door handle effectively.

Drawings

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

FIG. 2 is an exploded view of the structure of the present invention;

FIG. 3 is a cross-sectional view of the internal connection structure of the mounting base of the present invention;

fig. 4 is a schematic structural diagram of the first and second reset devices of the present invention;

FIG. 5 is a schematic view of the connection structure of the rotary core, the connecting block and the rotary shaft according to the present invention;

the labels in the figures are:

1. a handle; 2. a handle; 3. rotating the core; 4. a housing; 5. a first rotating block; 6. a second rotating block; 7. a spring; 8. a first torsion spring; 9. resetting the turntable; 10. a limiting plate; 11. a first stopper; 12. a second torsion spring; 13. a gasket; 14. a second limiting block; 15. mounting a plate; 16. a rotating shaft; 17. a lock cylinder; 18. a hook-shaped protrusion; 19. mounting a rod; 20. a connecting cylinder; 21. a first card key; 22. a second card key; 23. a first card slot; 24. a second card slot.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.

In the description of the present application, it is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. For convenience of description, the dimensions of the various features shown in the drawings are not necessarily drawn to scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

It should be noted that the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application are capable of operation in sequences other than those illustrated or described herein, and that the terms "first," "second," etc. are generally used in a generic sense and do not limit the number of terms, e.g., a first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

It should be noted that in the description of the present application, the orientation or positional relationship indicated by the terms such as "front, back, up, down, left, right", "lateral, vertical, horizontal" and "top, bottom" and the like are generally based on the orientation or positional relationship shown in the drawings for convenience of description and simplicity of description only, and in the case of not making a reverse description, these orientation terms do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

It should be noted that, in the present application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising 8230does not exclude the presence of additional like elements in a process, method, article, or apparatus comprising the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Example 1:

the present embodiment provides a door handle, including:

the handle 1 comprises a handle 2, a rotating core 3 and a connecting cylinder 20, wherein the connecting cylinder 20 is arranged on the handle 2, and the rotating core 3 is arranged in the handle 2;

a rotating shaft 16, wherein one end of the rotating shaft 16 is provided with a lock cylinder 17, and the other end of the rotating shaft is fixedly connected with the handle 1;

the mounting seat is arranged at the joint of the handle 1 and the rotating shaft 16;

the first reset device comprises a reset rotary disc 9 and a first torsion spring 8, the reset rotary disc 9 is fixedly installed on the end part of the connecting cylinder 20, the first torsion spring 8 is sleeved on the connecting cylinder 20, a first limiting block 11 is arranged on the reset rotary disc 9, and two ends of the first torsion spring 8 are arranged on two sides of the first limiting block 11;

the second resetting device comprises a gasket 13 and a second torsion spring 12, the gasket 13 is mounted on the rotating shaft 16, a second limiting block 14 is arranged on the peripheral side of the gasket 13, and two ends of the second torsion spring 12 are arranged on two sides of the second limiting block 14;

wherein, first resetting means and second resetting means all are located the mount pad.

In the technical scheme, the door handle is fixedly installed on a door through an installation seat, the handle 1 is connected with a rotating shaft 16, the rotating shaft 16 is connected with a lock cylinder 17, a connecting cylinder 20 of the handle 1 is fixedly connected with a reset rotary disc 9 in the installation seat, a first torsion spring 8 is sleeved on the connecting cylinder 20 of the handle 1 and is fixedly arranged between the reset rotary disc 9 and a shell 4, an extension section is arranged on the peripheral side of the reset rotary disc 9, a first limiting block 11 is positioned on the extension section, the handle 1 is rotated, the connecting cylinder 20 drives the reset rotary disc 9 to rotate, the reset rotary disc 9 rotates to drive the first limiting block 11 and one end of the first torsion spring 8 to be in touch extrusion, and the other end of the first torsion spring 8 is limited and fixed by the installation seat, so that the first limiting block 11 can push the first torsion spring 8 to be opened and deformed to generate a resilience force, when the handle 1 stops rotating, the resilience force of the first torsion spring 8 can push the reset rotary disc 9 to rotate to the original position, thereby driving the handle 1 to rotate to the original position, and achieve a reset effect;

the gasket 13 is arranged on the rotating shaft 16 and is clamped and fixed with the rotating shaft 16, when the handle 1 rotates to drive the rotating shaft 16 to rotate, the gasket 13 can also rotate, the second limiting block 14 on the gasket 13 can be in contact extrusion with one end of the second torsion spring 12, and the other end of the second torsion spring 12 is limited and fixed by the mounting rod 19, so that the second limiting block 14 pushes the second torsion spring 12 to be expanded and deformed to generate resilience force;

be equipped with the key hole on handle 1, in the key inserts the key hole, promote to rotate core 3 and make handle 1 can be fixed with 16 joints of pivot, handle 1 rotates handle 1 and can drive pivot 16 and the carousel 9 that resets after 16 joints of pivot are fixed, it is first, second torsional spring 12 all produces elasticity and promotes handle 1 and resets, when not having the key to insert the key hole, handle 1 rotates and only can drive the carousel 9 that resets and rotate, at this moment, handle 1's rotation can only realize idle running, can not play control to lock core 17, then realize resetting to handle 1 through first torsional spring 8, this design has realized the lock door effect of door handle, the practicality of door handle has been improved.

Example 2:

the present embodiment provides a door handle, which includes the technical features described in the above embodiments.

Furthermore, a connecting block and a spring 7 are arranged in the connecting cylinder 20, one end of the connecting block is connected with the rotating shaft 16, the other end of the connecting block is connected with the rotating core 3, and the spring 7 is located between the connecting block and the rotating shaft 16.

In the technical scheme, a first clamping key 21 is arranged at one end, connected with a rotating shaft 16, of a connecting block, a first clamping groove 23 is arranged at the end face, connected with the connecting block, of the rotating shaft 16, a second clamping groove 24 is arranged at one end, connected with a rotating core 3, of the connecting block, a second clamping key 22 is arranged on the rotating core 3, when a key is inserted into a key opening of a handle 2, the second clamping key 22 on the rotating core 3 is pushed to be inserted into the second clamping groove 24, then the connecting block is pushed, the first clamping key 21 is clamped with the first clamping groove 23, and then the handle 2 rotates to drive the rotating shaft 16 to rotate; an annular groove is formed in the end face, connected with the rotating shaft 16, of the connecting block, the spring 7 is arranged in the annular groove, two ends of the spring 7 are respectively in contact with the connecting block and the rotating shaft 16, when the connecting block is clamped on the rotating shaft 16, the spring 7 can be extruded to generate resilience force, when a key exits from a key hole and the lock cylinder 17 does not need to rotate, the resilience force of the spring 7 can push the connecting block to be away from the rotating shaft 16, the connecting block and the rotating shaft 16 are separated from clamping, and the lock cylinder 17 cannot be driven to rotate by rotation of the handle 1; utilize the key to promote and rotate core 3 to indirectly promote connecting block and 16 joints of pivot and drive lock core 17 and rotate, realize inserting the function that the key opened the door, extract behind the key, the elasticity of spring 7 can promote the connecting block and keep away from pivot 16 and realize extracting the function that the key locked the door, has improved the practicality of door handle effectively.

Example 3:

the present embodiment provides a door handle, which includes the technical features described in the above embodiments.

Further, the mount pad includes shell 4, mounting panel 15, installation pole 19 and an installation section of thick bamboo, and mounting panel 15 locates on the pivot 16 and shell 4 fixed connection, and 4 inner walls of shell are located to the installation section of thick bamboo, and installation pole 19 passes mounting panel 15 and installation section of thick bamboo fixed connection.

In this technical scheme, installation pole 19 is the threaded rod, and the installation section of thick bamboo is a screw section of thick bamboo and with shell 4 structure as an organic whole, the helicitic texture and the installation section of thick bamboo looks adaptation of installation pole 19, installation pole 19 pass the door and installation section of thick bamboo screw thread fixed connection for the door handle can be firm install on the door, has improved the installation fastness of door handle.

Example 4:

the present embodiment provides a door handle, which includes the technical features described in the above embodiments.

Furthermore, the reset rotary disc 9 is provided with a hollow structure, and the end of the connecting cylinder 20 is provided with a hook-shaped protrusion 18.

In this technical scheme, be equipped with hollow out construction on the carousel 9 resets, and connecting cylinder 20 passes the hollow out construction of carousel 9 resets, and hook-like arch 18 of connecting cylinder 20 is connected with carousel 9 joint resets, utilizes the hollow out construction of carousel 9 and the hook-like arch 18 of connecting cylinder 20 that resets to make carousel 9 that resets can be fixed in the tip of connecting cylinder 20, and simple structure, firm in connection of connecting cylinder 20 and carousel 9 resets have improved the practicality of door handle effectively.

Example 5:

the present embodiment provides a door handle, which includes the technical features described in the above embodiments.

Furthermore, a limiting plate 10 is arranged on the reset rotary table 9.

In this technical scheme, be equipped with limiting plate 10 on the carousel 9 that resets, rotate when handle 1 and drive carousel 9 that resets and rotate, when the turned angle of handle 1 was too big, limiting plate 10 on the carousel 9 that resets can contradict with the installation pole 19 that passes mounting panel 15, does not let carousel 9 that resets continue to rotate to the rotation range of restriction handle 1 also produces the guard action to the torsional spring, prevents that torsional spring deformation degree is too big, can't recover, has improved the practicality of door handle effectively.

Example 6:

the present embodiment provides a door handle, which includes the technical features described in the above embodiments.

Further, the connecting block includes that first commentaries on classics piece 5 and second change piece 6, and first commentaries on classics piece 5 and second change 6 mutual joints, are equipped with protruding and the spacing slider of V type on the first commentaries on classics piece 5, are equipped with the recess with the protruding looks adaptation of V type on the second commentaries on classics piece 6.

In the technical scheme, the connecting block is composed of a first rotating block and a second rotating block, the two ends of the first rotating block 5 are respectively connected with a rotating shaft 16 and a second rotating block 6, the two ends of the second rotating block 6 are respectively connected with the first rotating block 5 and a rotating core 3, a V-shaped bulge is arranged on the first rotating block 5, a groove matched with the first rotating block 6 is formed in the second rotating block 6, the first rotating block 5 is connected with the second rotating block 6 in a clamped mode, a certain gap exists between the first rotating block 5 and the second rotating block 6, when the rotating core 3 pushes the first rotating block 5 and the second rotating block 6 in a clamped mode, then the handle 1 rotates to drive the second rotating block 6 to rotate, the second rotating block 6 rotates to drive the first rotating block 5 to rotate, the limiting sliding block of the first rotating block 5 also rotates to assist in a connecting cylinder 20, the connecting block is set to be of a two-section structure, force transmission is improved, the handle 1 is rotated more labor-saving, and the practicability of the door handle is effectively improved.

While the embodiments of the present application have been described in connection with the drawings, the embodiments and features of the embodiments of the present application can be combined with each other without conflict, and the present application is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present application and the claims.

Claims (6)

1. A door handle, comprising:

the handle (1), the handle (1) includes the hand grip (2), rotates the core (3) and connecting cylinder (20), the connecting cylinder (20) locates on the hand grip (2), rotate the core (3) and install in the hand grip (2);

one end of the rotating shaft (16) is provided with a lock cylinder (17), and the other end of the rotating shaft (16) is fixedly connected with the handle (1);

the mounting seat is arranged at the joint of the handle (1) and the rotating shaft (16);

the first reset device comprises a reset rotary disc (9) and a first torsion spring (8), the reset rotary disc (9) is fixedly installed on the end portion of the connecting cylinder (20), the first torsion spring (8) is sleeved on the connecting cylinder (20), a first limiting block (11) is arranged on the reset rotary disc (9), and two ends of the first torsion spring (8) are arranged on two sides of the first limiting block (11);

the second reset device comprises a gasket (13) and a second torsion spring (12), the gasket (13) is installed on the rotating shaft (16), a second limiting block (14) is arranged on the peripheral side of the gasket (13), and two ends of the second torsion spring (12) are arranged on two sides of the second limiting block (14);

wherein, first resetting means and second resetting means all are located the mount pad.

2. A door handle as claimed in claim 1, wherein the connecting cylinder (20) is provided with a connecting block and a spring (7), one end of the connecting block is connected to the rotating shaft (16), the other end is connected to the rotating core (3), and the spring (7) is located between the connecting block and the rotating shaft (16).

3. A door handle as claimed in claim 1, wherein the mounting seat comprises a housing (4), a mounting plate (15) and a mounting rod (19), the mounting plate (15) is arranged on the rotating shaft (16) and fixedly connected with the housing (4), and the mounting rod (19) passes through the mounting plate (15) and is fixedly connected with the housing (4).

4. A door handle as claimed in claim 1, wherein the return turntable (9) is provided with a hollowed-out structure, and the end of the connecting cylinder (20) is provided with a hook-shaped protrusion (18).

5. A door handle as claimed in claim 1, wherein the return turntable (9) is provided with a limit plate (10).

6. The door handle according to claim 2, wherein the connecting block comprises a first rotating block (5) and a second rotating block (6), the first rotating block (5) and the second rotating block (6) are mutually clamped, a V-shaped protrusion and a limiting slide block are arranged on the first rotating block (5), and a groove matched with the V-shaped protrusion is formed in the second rotating block (6).

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