CN217841248U - Locking device - Google Patents

Abstract

The utility model discloses a locking device, which comprises a shell and a combination of an action body, a linkage frame and a sliding body which are arranged on the shell. The acting body is provided with a free end and a pivoting end which is matched with the elastic device to be pivoted with the shell, so that the acting body forms the action of swinging motion; the free end of the actuating body is provided with two cantilevers and an opening area between the cantilevers for the arrangement of an operating section. The linkage frame is provided with a first end pivoted on the free end (or the operation part) of the actuating body and a second end connected with the sliding body; when a person presses the operation part, the action body is allowed to move from a closed position to an open position to drive the linkage frame and the sliding body to move, so that the situation that the length/specification of the structure is limited due to the configuration space/volume of the existing structure and the operation convenience is influenced is improved.

Description

Locking device

Technical Field

The utility model relates to a structure of a locking device; in particular, it relates to a technique for improving the limitation of the length and specification of the conventional structure due to the arrangement space by providing an operation part in combination with an operating body.

Background

A locking device or a similar device is applied to a cover plate structure of computer/electronic equipment and a server case \8230, and the like, so that personnel can operate the opening/closing of the computer/electronic equipment or control the cover plate structure to lock and close a case body, the exposure of components or parts in the case is avoided, or the cover plate structure is operated to be opened, and the personnel can configure and maintain the components in the case \8230, and the like, and the operation belongs to the known technology.

For example, US 6174007 B1 ACTUATOR ASSEMBLY, US 7201407 B2 SLIDING PANEL LATCH, US 8256737 B2 LEVERAGE DEVICE AND SYSTEM USING SAME, CN 110388148A LATCH set, CN 207660U LATCH AND housing ASSEMBLY including LATCH set (i.e., taiwan 107207996 shroud LATCH set), CN 206685594U LATCH AND housing ASSEMBLY including LATCH set (i.e., taiwan 106215877 hood LATCH set), AND the like, provide exemplary embodiments.

Such latching devices typically include a housing, actuating handle and slide plate; one end of the shell is provided with a press button. The actuating handle is provided with a pivoting end matched with the spring and is pivoted at the other end of the shell; the other end of the actuating handle is pivoted with the connecting rod, and the other end of the actuating handle is provided with a protruding part to allow the protruding part to be embedded into the pressing button to form a locking state. When the operator operates the press button to release the protrusion, the spring pushes the actuating handle to open, the sliding plate is driven to move, and the connecting rod supports the actuating handle.

One problem with the conventional latch device assembly is that the length or specification of the housing is required to be reduced, and the length of the actuating handle and the pressing knob must be reduced, which is undesirable, in terms of the structure and operation application, and the operating convenience of the actuating handle is relatively affected.

Representatively, these references show the skill in the art of designing and applying the structural combinations of the latch mechanism or the like; if the design consideration is repeated to the structural configuration of the latch device or the actuating handle, so that the structure is different from that of the user, the use configuration can be changed, and the design is different from the old method; substantially, the application effect thereof is also increased.

It has been found that a more desirable latch configuration, which overcomes or ameliorates the above discussed problems, includes the following design considerations:

1. under the condition that the structures (or the shells) have the same length or specification, the length of the actuating handle can be increased as much as possible, so that the length of the actuating handle is larger than that of the existing structure, and the operation convenience of the latch device (or the actuating handle) is improved.

2. Further consider to provide a structure form that the pressing operation structure can be directly combined on the actuating handle (or the actuating body), and can still achieve the effect of smooth movement of the pressing operation structure and the actuating handle (or the actuating body) on the premise of not influencing or shortening the length of the actuating handle.

None of these issues are taught or specifically disclosed in the above references.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a locking device, including the casing with install the combination of action body, interlock frame, the sliding body on the casing. The actuating body is provided with a free end and a pivoting end which is pivoted with the shell in cooperation with the elastic device, so that the actuating body forms the action of swinging motion; the free end of the actuating body is provided with two cantilevers and an open area between the cantilevers for the provision of an operating section. The linkage frame is provided with a first end pivoted on the free end (or the operation part) of the actuating body and a second end connected with the sliding body; when a person presses the operation part, the action body is allowed to move from a closed position to an open position to drive the linkage frame and the sliding body to move, so that the situation that the length/specification of the structure is limited due to the configuration space/volume of the existing structure and the operation convenience is influenced is improved.

According to the locking device of the utility model, the operation part comprises a pressing end and a combined end for operation; the combined end is pivoted with the first end of the moving frame and is provided with a positioning part with a hook-shaped structure. The sliding body is provided with a secondary positioning part corresponding to the positioning part; when the operating body is at the closed position (or the operating body is closed in the housing), the positioning part is allowed to be combined with the auxiliary positioning part, so that the operating body is buckled on the sliding body to form a fixed shape.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

FIG. 2 is an exploded schematic view of FIG. 1; the structural conditions of the shell, the acting body, the linkage frame, the sliding body and the elastic device are shown.

Fig. 3 is a schematic plan view of the structure of fig. 1.

FIG. 4 is a cross-sectional view of the structure of FIG. 3; the structural situation is shown with the lock mechanism in the locked state.

FIG. 5 is a schematic plan view of an operational embodiment of FIG. 4; the structural situation is depicted with the lock mechanism in the unlocked state.

Fig. 6 is a schematic view of a plane structure of the present invention; the structure situation that the positioning part of the operation part is combined with the auxiliary positioning part of the sliding body to enable the actuator to be in the closed position is shown.

FIG. 7 is a schematic plan view of an operational embodiment of FIG. 6; the structure in which the operator presses the operation portion and the positioning portion is separated from the sub-positioning portion is depicted.

Fig. 8 is a schematic plan view of an operational embodiment of the present invention; the situation of the structure that the elastic device drives the actuating body to move towards the upper direction or the opening position to drive the linkage frame and the sliding body to move is shown.

Description of the reference numerals

10 casing

11 bottom wall

12 side wall

13 main end wall

14 minor end wall

15 chamber

16-shaped hole

17 axle hole

18 gap

20 actuating body

21 free end

22 pivoting end

23 coupling part

24 recess

25 cantilever

25a stop

26 open area

27. 37, 87 pin hole

28 concave hole

29 regulating part

30 linkage rack

31 first end

32 second end

33 coupling part

35 concave part

36 lock connection hole

38 through hole

39 Ring nose

40 sliding body

41 combination part

42 axle hole

43 main terminal

44 secondary terminal

45 subsidiary positioning part

50 elastic device

51. 54 first stage

52. 58 second section

53. 56 ring part

55 spring

60 lock mechanism

61 rotating body

62 locking plate

63 subsidiary restriction part

64 base part

65 parts of the assembly

66 wing part

70 shaft

73 axle pin

77 axle post

80 operating part

81 pressing end

82 combined end

84 positioning part

85 convex arm

86 empty areas.

Detailed Description

Referring to fig. 1, 2 and 3, the locking device of the present invention includes a combination of a housing, an actuating body, a linking frame and a sliding body, which are denoted by reference numerals 10, 20, 30 and 40, respectively. The housing 10 has a bottom wall 11, two side walls 12 extending parallel to the axial direction of the housing 10, a main end wall 13 and a sub-end wall 14 connecting the side walls 12 and perpendicular to the axial direction of the housing 10, and together define a cavity 15 of the housing 10 having an open shape for accommodating the actuating body 20, the interlocking frame 30 and the sliding body 40. And, the side wall 12 of the housing 10 is provided with an elongated hole 16, and the main end wall 13 and the auxiliary end wall 14 are respectively formed with a notch 18.

In the following description, it is assumed that upper, lower, right, left, side, 8230, etc. are referred to with reference to the direction shown in the drawings.

In the illustrated embodiment, the actuator 20 is a plate structure defining a free end 21 and a pivoting end 22 pivotally connected to the housing 10 in cooperation with the elastic device 50, so that the actuator 20 performs a swinging motion.

In detail, the pivot end 22 of the actuating body 20 is provided with a shaft connection portion 23 and concave portions 24 at two ends of the shaft connection portion 23; the recess 24 provides a space for the spring 50. The elastic means 50 is in the form of a torsion spring having a ring portion 53 and first and second segments 51 and 52 connected to the ring portion 53. The shaft connecting part 23 combines a shaft 70, and the shaft 70 penetrates the ring part 53 of the elastic device 50 and the shaft hole 17 formed on the side wall 12 of the shell 10; the first section 51 of the elastic device 50 abuts against the bottom wall 11 of the housing 10, and the second section 52 abuts against the operating body 20 (or the recess 24), so that the operating body 20 is formed into a rocking motion (or a swinging motion).

The figure also depicts the free end 21 of the actuating body 20 provided with two (parallel) projecting cantilevers 25 and an open area 26 between the two cantilevers 25. The cantilever 25 is formed with a stopper 25a; the tail of the cantilever 25 is provided with a pin hole 27. And, the opening area 26 is used to set the operation portion 80; the stop portion 25a can assist the operation portion 80 to be positioned at the correct position after being assembled at the opening region 26 of the actuator 20.

In the illustrated embodiment, the operation portion 80 includes a pressing end 81 and a combining end 82 for operation; the combination end 82 is provided with a pin hole 87 and two parallel arms 85, and a hollow area 86 is defined between the two arms 85. The tail end of the convex arm 85 forms a positioning part 84 with a hook-shaped structure; the pin hole 87 of the combination end 82 and the pin hole 27 of the cantilever 25 are pivoted to the pivot pin 77, and the operation portion 80 is in a rocking motion.

Specifically, the pressing end 81 of the operation portion 80 faces the direction of the pivoting end 22 of the operation body 20, and the combining end 82 of the operation portion 80 pivots the interlocking frame 30. The linkage frame 30 defines a first end 31 and a second end 32; the first end 31 is accommodated in the vacant area 86 of the operation portion 80. The first end 31 is provided with a pin hole 37 and a recess 35 that accommodates a spring 55. And the spring 55 has a ring portion 56 and a first section 54, a second section 58 connecting the ring portion 56.

Fig. 2 and 3 show that the shaft pin 77 also penetrates the pin hole 37 of the first end 31 of the coupling frame 30 and the ring portion 56 of the spring 55; the first section 54 of the spring 55 abuts against the linking frame 30, and the second section 58 of the spring 55 abuts against the operating portion 80 (or the combination end 82).

That is, the first end 31 of the linking frame 30 forms the combined end 82 of the pivot operation part 80 and the free end 21 of the actuator 20 in a rotatable manner.

In the embodiment, the second end 32 of the linking frame 30 is provided with a shaft connecting portion 33 for pivotally connecting a shaft post 73, so that the second end 32 of the linking frame 30 is freely rotatable. The shaft column 73 is combined with the shaft connection part 33 of the coupling frame 30 and is also pivoted with the sliding body 40.

The slider 40 is illustrated as a plate structure, and is mounted to the housing 10 (or the chamber 15) so as to be movable. The slider body 40 defines a major end 43 and a minor end 44; between the main end 43 and the sub end 44, a combination portion 41 of a flange structure and a shaft hole 42 formed on the combination portion 41 are provided.

Therefore, the shaft pillar 73 combines the coupling portion 33 of the coupling frame 30 and the shaft hole 42 of the combination portion 41 of the sliding body 40; the pivot posts 73 (both ends) are pivoted to the elongated holes 16 of the housing 10. When a person presses the operation portion 80, the operation portion 20 is allowed to move from a closed position to an open position, and the linkage frame 30 is driven to move, so that the shaft post 73 moves along the elongated hole 16, and the sliding body 40 is driven to move; the situation that the length/specification of the structure is limited due to the space/volume of the existing structure, and the operation convenience is influenced is improved.

The closed position is a position where the operating body 20 is retracted in the housing 10 (or the chamber 15); the open position refers to a position where the actuating body 20 (or the free end 21) moves away from the housing 10.

The sub-positioning portion 45 is provided at the sub-end 44 of the sliding body 40 corresponding to the positioning portion 84 of the operating portion 80; when the actuator 20 is in the closed position (or the actuator 20 is closed in the housing 10), the positioning portion 84 is allowed to be combined with the sub-positioning portion 45, so that the actuator 20 is engaged with the sliding body 40 to form a fixed configuration.

Referring to fig. 2 and 3, the actuating body 20 is provided with a cavity 28 and a limiting portion 29 formed on the cavity 28 between the free end 21 and the pivot end 22, and the limiting portion 29 is a protruding plate structure; and the cavity 28 is fitted with a locking mechanism 60. The lock mechanism 60 includes a combination of a swivel 61 received in the cavity 28 and a lock plate 62 pivotally connecting the swivel 61.

The figure depicts the swivel 61 formed with the sub-restricting portion 63 and the base portion 64 in a protruding shaft structure; and the lock plate 62 has a hole-like structured coupling portion 65 and a wing portion 66 connecting the coupling portion 65. After the lock mechanism 60 is mounted in the cavity 28, the base 64 is allowed to pivot (project) the coupling portion 65 of the lock plate 62; when the person operates the rotating body 61 to rotate, the rotation angle or the rotation range of the rotating body 61 is regulated by a mechanism in which the restricting portion 29 of the operating body 20 blocks the sub restricting portion 63.

The interlocking frame 30 has a locking hole 36 between the first end 31 and the second end 32 for allowing the locking plate 62 (or the wing 66) to pass through, corresponding to the structure of the locking mechanism 60. The locking hole 36 is formed by forming a ring protrusion 39 on a through hole 38.

Referring to fig. 4, when the locking mechanism 60 is in the locked state, the wing portion 66 is locked on the locking hole 36 (or the annular protrusion 39), so that the actuator 20, the linking frame 30 and the sliding body 40 are closed and fixed in the housing 10 (or the chamber 15).

Fig. 5 depicts the structure that the person rotates the rotator 61 to unlock the wing 66 of the locking plate 62 and the coupling frame 30 to lock the hole 36, thereby forming the unlocked state.

Fig. 6 shows a state where the positioning portion 84 of the operation portion 80 is coupled or engaged with the sub-positioning portion 45 of the sliding body 40, and a state where the operation body 20, the interlocking frame 30 and the sliding body 40 are kept closed in the housing 10 (or the chamber 15).

Referring to fig. 7, when a person presses the pressing end 81 of the operation portion 80, the positioning portion 84 of the operation portion 80 is separated from the sub-positioning portion 45 of the sliding body 40. Therefore, the elastic device 50 releases the accumulated energy to push the actuator 20 to move toward the open position, so as to drive the linking frame 30 to move; such as the situation depicted in fig. 8.

The actuator 20 is also shown to move the second end 32 of the linking frame 30 with the shaft 73 along the elongated hole 16 and move the sliding body 40 between the main end wall 13 (or its notch 18) and the auxiliary end wall 14 (or its notch 18) of the housing 10.

In one possible embodiment, the main end 43 of the sliding body 40 has a portion of its area protruding beyond the notch 18 of the main end wall 13 of the housing 10 when the rotor 20 is closed on the housing 10. When the actuator 20 is at the open position, the secondary end 44 (or the secondary positioning portion 45) of the slide 40 is relatively driven to protrude from the notch 18 of the secondary end wall 14 of the housing 10.

Typically, the latching mechanism has the following advantages over the older method:

1. the housing 10, the actuating body 20, the linking frame 30, the sliding body 40 and the related components have been re-designed. For example, the free end 21 of the actuating body 20 is provided with two cantilevers 25 and an open area 26, fitted with an operating part 80; the pivot end 82 of the operation part 80 is provided with a convex arm 85, a vacant area 86 and a positioning part 84, and the first end 31 of the linkage frame 30, the concave part 35 and the spring 55 are combined, so that the first section 54 of the spring abuts against the linkage frame 30, and the second section 58 of the spring abuts against the operation part 80; the second end 32 of the coupling rack 30 is pivoted to the sliding body 40; the auxiliary end 44 of the sliding body 40 is provided with an auxiliary positioning part 45 which is engaged with the positioning part 84 of the operation part 80 to control the parts of the actuating body 20, the linkage frame 30 and the like to be closed on the shell 10 or allow the actuating body 20 to drive the linkage frame 30, the sliding body 40 to move and the like, which is obviously different from a user, and the structure or the combination relationship of the prior latch device is also changed, so that the use and the operation form of the latch device are different from the prior method.

2. Particularly, under the condition that the structure (or the housing 10) has the same length or specification (or the length of the actuating handle is not affected or reduced), the operating portion 80 is directly combined with the structural form of the actuating body 20, which is different from the prior art (the actuating handle and the pressing button are respectively installed on the housing to occupy different spaces/lengths), so that the length of the actuating body 20 can be increased as much as possible, and the length of the actuating body 20 is longer than that of the prior structure, and the pressing operation structure and the action of smooth movement of the actuating body 20, the linkage frame 30 and the sliding body 40 are achieved; the situation that the length/specification of the structure is limited due to the configuration space/volume of the existing structure, and the operation convenience is influenced is improved.

Therefore, the utility model provides an effective locking device, its space form is different from current structure, and has incomparable advantage in the current structure.

Claims (14)

1. A locking device is characterized in that: comprises a shell, and an action body, a linkage frame and a sliding body which are arranged on the shell;

the acting body is provided with a free end and a pivoting end which is matched with the elastic device to be pivoted with the shell, so that the acting body forms the action of swinging motion;

the free end of the actuating body is provided with two cantilevers and an opening area positioned between the cantilevers, and the opening area is used for arranging an operating part; and

the linkage frame is provided with a first end which can rotate freely and a second end which is connected with the sliding body, and the first end is pivoted with at least one of the free end of the actuating body and the operating part; when a person presses the operating part, the actuating body is allowed to move from a closed position to an open position, so that the linkage frame and the sliding body are driven to move.

2. The latching device of claim 1, wherein: the shell is provided with a bottom wall, two side walls extending along the direction parallel to the axis of the shell, a main end wall and an auxiliary end wall which are connected with the side walls and are vertical to the direction of the axis of the shell, and the main end wall and the auxiliary end wall jointly define a cavity of the shell with an open shape for accommodating the acting body, the linkage frame and the sliding body;

the side wall of the shell is provided with a long hole, and the main end wall and the auxiliary end wall are respectively provided with a notch;

the actuating body is in a plate structure, the pivoting end of the actuating body is provided with a shaft connecting part and concave parts positioned at two ends of the shaft connecting part, and the concave parts accommodate the elastic devices.

3. The latching device of claim 2, wherein: the elastic device selects a torsion spring shape and is provided with a ring part, a first section and a second section which are connected with the ring part;

the shaft connecting part is combined with a shaft, the shaft penetrates through a ring part of the elastic device and a shaft hole formed on the side wall of the shell, a first section of the elastic device abuts against the bottom wall of the shell, and a second section of the elastic device abuts against the concave part of the actuating body;

the cantilevers of the actuating bodies are parallel to each other; the cantilever is provided with a blocking part; the tail part of the cantilever is provided with a pin hole.

4. A latching device as claimed in claim 1, 2 or 3, wherein: the operating part comprises a pressing end and a combined end for operation;

the combination end is provided with a pin hole and two convex arms, and a dead zone is defined between the two convex arms; the tail end of the convex arm forms a positioning part with a hook-shaped structure;

the combined end and the cantilever are correspondingly pivoted with a shaft pin, so that the operating part forms a swinging motion form;

the pressing end of the operating part faces the direction of the pivoting end of the actuating body, and the combined end of the operating part is pivoted with the moving frame;

the first end of the linking frame is accommodated in the vacant area of the operation part.

5. The latching device of claim 4, wherein: the two convex arms of the operating part are in a parallel shape;

the first end of the linkage frame is provided with a pin hole and a concave part (35) for accommodating the spring;

the spring is provided with a ring part and a first section and a second section which are connected with the ring part;

the shaft pin penetrates through the pin hole at the first end of the linkage frame and the ring part of the spring; the first section of the spring is abutted against the linkage frame, and the second section of the spring is abutted against the combined end of the operation part, so that the first end of the linkage frame is pivoted with the combined end of the operation part and the free end of the action body;

the second end of the coupling frame is provided with a shaft connecting part for pivotally connecting a shaft column, so that the second end of the coupling frame forms a freely rotating shape; the shaft column is also pivoted with the sliding body.

6. A latching apparatus as claimed in claim 1, 2 or 3, wherein: the sliding body is of a plate body structure and is defined with a main end and an auxiliary end provided with an auxiliary positioning part;

a combination part of a convex plate structure and a shaft hole formed on the combination part are arranged between the main end and the auxiliary end;

a shaft hole of the combined part of the shaft column combined linkage frame and the sliding body; and, the two ends of the shaft post are pivoted with the shell.

7. The latching device of claim 4, wherein: the sliding body is of a plate body structure and is defined with a main end and an auxiliary end provided with an auxiliary positioning part; and

a combination part of a convex plate structure and a shaft hole formed on the combination part are arranged between the main end and the auxiliary end;

a shaft hole of the combined part of the shaft column combined linkage frame and the sliding body; and, the two ends of the shaft post are pivoted with the shell.

8. The latching device of claim 5, wherein: the sliding body is of a plate body structure and is defined with a main end and an auxiliary end provided with an auxiliary positioning part; and

a combination part of a convex plate structure and a shaft hole formed on the combination part are arranged between the main end and the auxiliary end;

the shaft column combination linkage frame shaft connection part and the combination part shaft hole of the sliding body; and, the two ends of the shaft post are pivoted with the shell.

9. A latching apparatus as claimed in claim 1, 2 or 3, wherein: the actuating body is provided with a concave hole and a limiting part formed on the concave hole between the free end and the pivoting end, and the limiting part is of a protruding sheet structure; and

the concave hole is provided with a lock mechanism; the lock mechanism comprises a rotating body accommodated in the concave hole and a lock plate pivoted with the rotating body;

the rotator is provided with an auxiliary limiting part and a base part in a convex shaft structure; the locking plate is provided with an assembling part with a hole-shaped structure and a wing part connected with the assembling part; the base part is pivoted with the assembling part of the locking plate;

the linkage frame is arranged between the first end and the second end and is provided with a locking hole; the locking hole is formed by matching a ring convex part on a through hole.

10. The latching device of claim 4, wherein: the actuating body is provided with a concave hole and a limiting part formed on the concave hole between the free end and the pivoting end, and the limiting part is of a protruding sheet structure;

the concave hole is provided with a lock mechanism; the lock mechanism comprises a rotating body accommodated in the concave hole and a lock plate pivoted with the rotating body; the rotator is provided with an auxiliary limiting part and a base part in a convex shaft structure; the lock plate is provided with an assembling part with a hole-shaped structure and a wing part connected with the assembling part; the base part is pivoted with the assembling part of the locking plate;

the linkage frame is arranged between the first end and the second end and is provided with a lock connecting hole; the locking hole is formed by matching a ring convex part on a through hole.

11. The latching device of claim 5, wherein: the actuating body is provided with a concave hole and a limiting part formed on the concave hole between the free end and the pivoting end, and the limiting part is of a protruding sheet structure;

the concave hole is provided with a lock mechanism; the lock mechanism comprises a rotating body accommodated in the concave hole and a lock plate pivoted with the rotating body; the rotator is provided with an auxiliary limiting part and a base part in a convex shaft structure; the lock plate is provided with an assembling part with a hole-shaped structure and a wing part connected with the assembling part; the base part is pivoted with the assembling part of the locking plate;

the linkage frame is arranged between the first end and the second end and is provided with a locking hole; the locking hole is formed by matching a ring convex part on a through hole.

12. The latching device of claim 6, wherein: the actuating body is provided with a concave hole and a limiting part formed on the concave hole between the free end and the pivoting end, and the limiting part is of a protruding sheet structure;

the concave hole is provided with a lock mechanism; the lock mechanism comprises a rotating body accommodated in the concave hole and a lock plate pivoted with the rotating body; the rotator is provided with an auxiliary limiting part and a base part in a convex shaft structure; the locking plate is provided with an assembling part with a hole-shaped structure and a wing part connected with the assembling part; the base part is pivoted with the assembling part of the locking plate;

the linkage frame is arranged between the first end and the second end and is provided with a locking hole; the locking hole is formed by matching a ring convex part on a through hole.

13. The latching device of claim 7, wherein: the actuating body is provided with a concave hole and a limiting part formed on the concave hole between the free end and the pivoting end, and the limiting part is of a protruding sheet structure;

the concave hole is provided with a lock mechanism; the lock mechanism comprises a rotating body accommodated in the concave hole and a lock plate pivoted with the rotating body; the rotator is provided with an auxiliary limiting part and a base part in a convex shaft structure; the lock plate is provided with an assembling part with a hole-shaped structure and a wing part connected with the assembling part; the base part is pivoted with the assembling part of the locking plate;

the linkage frame is arranged between the first end and the second end and is provided with a locking hole; the locking hole is formed by matching a ring convex part on a through hole.

14. The latching device of claim 8, wherein: the actuating body is provided with a concave hole and a limiting part formed on the concave hole between the free end and the pivoting end, and the limiting part is of a protruding sheet structure;

the concave hole is provided with a lock mechanism; the lock mechanism comprises a combination of a rotating body accommodated in the concave hole and a lock plate pivoted with the rotating body; the rotator is provided with an auxiliary limiting part and a base part in a convex shaft structure; the locking plate is provided with an assembling part with a hole-shaped structure and a wing part connected with the assembling part; the base part is pivoted with the assembling part of the locking plate;

the linkage frame is arranged between the first end and the second end and is provided with a locking hole; the locking hole is formed by matching a ring convex part on a through hole.

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