CN114146335B

CN114146335B - Safety lock catch

Info

Publication number: CN114146335B
Application number: CN202111483451.1A
Authority: CN
Inventors: 马天鹏; 张靖
Original assignee: Andanda Industrial Technology Shanghai Co ltd
Current assignee: Andanda Industrial Technology Shanghai Co ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-12-09
Anticipated expiration: 2041-12-07
Also published as: CN114146335A

Abstract

The invention discloses a safety lock catch which comprises a female buckle and a male buckle, wherein a hook on the female buckle is buckled and connected with a through hole arranged on the male buckle, and the female buckle also comprises a locking assembly and a shell; a first vertical rod, a second vertical rod and a cross bar are arranged on the inner surface of the shell; the locking assembly comprises a first locking rod, a second locking rod, a first torsion spring and a second torsion spring; the female buckle body extends to the hook to form a transition section, and the size of the transition section along the y direction is larger than that of the through hole along the y direction; the through hole wall is greater than the size of the projection of the connecting line of the two end parts on the body from the x direction to the free end of the hook when the first locking rod straight section and the second locking rod straight section are separated from each other along the x direction to the edge of the male buckle, and is greater than the size of the projection of the hook to the body along the z direction. The lock catch has the characteristics of simple structure and convenience in operation, and the condition that the lock catch is opened due to misoperation of operators can be avoided.

Description

Safety lock catch

Technical Field

The application relates to the field of lock catch technology, in particular to a safe lock catch.

Background

The safety belt for high-altitude operation is a device for preventing falling of an operator in high-altitude operation, and is one of the most common falling-preventing devices for high-altitude operation at present. In order to facilitate the wearing and the taking off of the safety belt by a user, the positions of the chest, the legs and the like of the safety belt are usually provided with the lock catches, and the user can open or lock the lock catches when wearing and taking off the safety belt. In the aerial work safety belt in the prior art, the common lock catches are a Chinese character 'ri' lock catch and a plug-in lock catch. The structure of the square lock catch is simple, but the lock catch is inconvenient to open or lock in the putting-on and taking-off process; plug-in hasp is mostly pure metal construction, greatly increased the weight of high altitude construction safety belt when whole body is equipped with a plurality of hasps to plug-in hasp all only needs an action to open the hasp when the unblock, and the condition that has the operation personnel to open the hasp under the condition of maloperation takes place, leads to the emergence accident in the operation personnel working process.

Disclosure of Invention

In order to solve at least one aspect of the above problems, the present invention provides a safety lock catch, which includes a female buckle and a male buckle, wherein a hook on the female buckle is connected with a through hole on the male buckle in a buckling manner, and the female buckle further includes a locking assembly and a housing; a first vertical rod, a second vertical rod and a cross bar are arranged on the inner surface of the shell; the locking assembly comprises a first locking rod, a second locking rod, a first torsion spring and a second torsion spring; the first locking rod and the second locking rod respectively comprise a straight section and an arc-shaped section which are connected with each other; the first torsion spring and the second torsion spring are respectively sleeved on the first vertical rod and the second vertical rod, first free ends of the first torsion spring and the second torsion spring respectively abut against the cross bar, and second free ends of the first torsion spring and the second torsion spring respectively abut against arc-shaped section side walls of the first locking rod and the second locking rod; the first vertical rod and the second vertical rod penetrate through fixing holes formed in the first locking rod and the second locking rod and are fixed on the female buckle body, so that the first locking rod and the second locking rod can rotate in a plane parallel to the surface of the female buckle body; the first locking lever and the second locking lever are arranged so that their respective straight sections are in close contact with each other and the curved sections are away from each other; the female buckle body extends to the hook to form a transition section, and the size of the transition section along the y direction is larger than that of the through hole along the y direction; the through hole wall is greater than the size of the projection of the connecting line of the two end parts on the body from the x direction to the free end of the hook when the first locking rod straight section and the second locking rod straight section are separated from each other along the x direction to the edge of the male buckle, and is greater than the size of the projection of the hook to the body along the z direction. Through the technical scheme, the first torsion spring and the second torsion spring provide torsional force for the first locking rod and the second locking rod, so that the straight section of the first locking rod and the straight section of the second locking rod are kept closed when the locking assembly is not operated; through pressing down or unclamping the tip of first locking pole segmental arc and the tip of second locking pole segmental arc, can realize the separation or the closure of the flat straight section tip of first locking pole and the flat straight section tip of second locking pole to can realize the installation or the dismantlement of pin thread on the box couple, simple structure, convenient operation.

Through at the box body to couple extension changeover portion, and with the size of through-hole wall along x direction to pin thread edge, the design is greater than the line of two tip when first locking lever straight section and the straight section separation of second locking lever along x direction to couple free end projected size on the body, and be greater than the couple to the body along the size of z direction, can restrict the pin thread pivoted angle in the couple, guarantee under the circumstances of not opening the locking subassembly, the pin thread can not break away from the couple, and can realize opening under the circumstances of locking subassembly, the pin thread needs to rotate certain angle and just can take out from the couple, avoided because the operating personnel mistake press first locking lever and second locking lever and make the condition that the pin thread breaks away from in the couple take place, the security of this application hasp has further been improved.

Preferably, the end of the straight section of the first locking rod and the end of the straight section of the second locking rod are close to each other, a concave part is formed in the position, close to the through hole, of the male buckle, a convex block extends from the edge, close to the through hole, of the male buckle, and the size of the convex block is matched with that of the concave part. Through the technical scheme, the concave part is arranged near the end part of the straight section of the first locking rod and the end part of the straight section of the second locking rod, the edge close to the through hole extends to form a convex block on the male buckle, the male buckle can be installed to the hook in the process, the arc-shaped section of the first locking rod and the arc-shaped section of the second locking rod do not need to be pressed, the concave part is pressed only through the convex block to separate the straight section of the first locking rod and the straight section of the second locking rod, the male buckle can be installed to the hook, and the convenience in operation of the lock catch is further improved.

Preferably, the housing is made of plastic. Through above-mentioned technical scheme, the shell that adopts the plastics material to make can reduce the weight of this application hasp to reduce the weight of whole high altitude construction safety belt, alleviate the burden in operation personnel's the working process.

Preferably, the end face of the arc-shaped section of the first locking rod is fixedly connected with a first button, and the end face of the arc-shaped section of the second locking rod is fixedly connected with a second button. Through above-mentioned technical scheme, set up first button on first locking pole segmental arc, set up the second button on second locking pole segmental arc, through pressing down or unclamping first button and second button for first locking pole segmental arc and second locking pole segmental arc are close to each other or keep away from, provide convenience for pressing first locking pole and second locking pole.

Preferably, the top surface of the first button and the top surface of the second button are both inclined surfaces, and the inclined surfaces are arranged obliquely downwards towards the direction in which the first locking rod and the second locking rod are deviated from each other. Through above-mentioned technical scheme, the top surface of first button and the top surface design of second button are towards the downward inclined plane of the direction slope that first locking pole and second locking pole deviate from mutually, provide convenience for pressing first button and second button.

Preferably, the first and second locking levers are both made of plastic. Through above-mentioned technical scheme, the weight of this application hasp can be reduced to first lock pin and the second lock pin that adopts plastics to make to reduce the weight of whole high altitude construction safety belt, alleviate the burden in operation personnel's the working process.

The safety lock catch comprises a female buckle and a male buckle, wherein a hook on the female buckle is buckled and connected with a through hole arranged on the male buckle, and the female buckle also comprises a locking assembly which is fixed on a female buckle body and can rotate in a plane parallel to the surface of the female buckle body; the locking assembly comprises a first locking rod, a second locking rod and an elastic piece; the first locking rod and the second locking rod respectively comprise a straight section and an arc-shaped section which are connected with each other; the first locking rod and the second locking rod are arranged to enable the straight sections of the first locking rod and the second locking rod to be attached to each other, and the arc-shaped sections of the first locking rod and the second locking rod are far away from each other; the elastic piece is connected between the arc sections of the first locking rod and the second locking rod; the female buckle body extends to the hook to form a transition section, and the size of the transition section along the y direction is larger than that of the through hole along the y direction; the through hole wall is greater than the size of the projection of the connecting line of the two end parts on the body from the x direction to the free end of the hook when the first locking rod straight section and the second locking rod straight section are separated from each other along the size from the x direction to the edge of the male buckle, and is greater than the size from the hook to the body along the z direction. Through above-mentioned technical scheme, set up the elastic component between first locking lever and second locking lever, be close to each other for first locking lever arc-shaped segment and second locking lever arc-shaped segment and provide the resistance to guarantee under the condition of not pressing first locking lever and second locking lever, the straight section of first locking lever and the straight section of second locking lever keep closed, provide another kind of structural style for the hasp of this application.

Preferably, the end of the straight section of the first locking rod and the end of the straight section of the second locking rod are close to each other, a concave part is formed in the position, close to the through hole, of the male buckle, a convex block extends from the edge, close to the through hole, of the male buckle, and the size of the convex block is matched with that of the concave part. Through the technical scheme, the tip at the flat straight section of first locking lever and the tip of the flat straight section of second locking lever are close to each other and set up the concave part, the edge that is close with the through-hole on public knot extends there is the lug, can install to the couple in-process at public knot, the segmental arc that need not to press first locking lever and the segmental arc of second locking lever, only need press the concave part through the lug and make the flat straight section of first locking lever and the flat straight section separation of second locking lever, just can install public knot to the couple in, the convenience of this application hasp operation has further been improved.

Preferably, the elastic part is a compression spring, and two ends of the compression spring are fixedly connected with the side faces, close to each other, of the arc-shaped sections of the first locking rod and the second locking rod respectively. Through above-mentioned technical scheme, a structure of elastic component is disclosed, with compression spring connect between the side that first locking lever and the respective segmental arc of second locking lever are close to each other, for the segmental arc of first locking lever and the segmental arc of second locking lever provide the pressure of keeping away from the direction to it, guarantee under the condition of not operating the locking subassembly, the straight section of first locking lever and the straight section of second locking lever keep closed.

Preferably, the end face of the arc-shaped section of the first locking rod is fixedly connected with a first button, and the end face of the arc-shaped section of the second locking rod is fixedly connected with a second button. Through the technical scheme, the first button is arranged on the first locking rod arc-shaped section, the second button is arranged on the second locking rod arc-shaped section, and the first button and the second button are pressed or loosened, so that the first locking rod arc-shaped section and the second locking rod arc-shaped section are close to or far away from each other, and convenience is provided for pressing the first locking rod and the second locking rod.

The safety lock catch disclosed by the invention has the following beneficial effects:

(1) Through setting up first locking lever, second locking lever, first torsion spring, second torsion spring, first vertical pole and second vertical pole, press down or loosen the tip of first locking lever arc section and the tip of second locking lever arc section, can realize the separation or the closure of the straight section tip of first locking lever and the straight section tip of second locking lever to can realize the installation or the dismantlement of pin thread on the box couple, simple structure, convenient operation.

(2) Through at the box body to couple extension changeover portion, and with the size of through-hole wall along x direction to pin thread edge, the design is greater than the line of two tip when first locking lever straight section and the straight section separation of second locking lever along x direction to couple free end projected size on the body, and be greater than the couple to the body along the size of z direction, can restrict the pin thread pivoted angle in the couple, guarantee under the circumstances of not opening the locking subassembly, the pin thread can not break away from the couple, and can realize opening under the circumstances of locking subassembly, the pin thread needs to rotate certain angle and just can take out from the couple, avoided because the operating personnel mistake press first locking lever and second locking lever and make the condition that the pin thread breaks away from in the couple take place, the security of this application hasp has further been improved.

(3) Through shell, first locking lever and the second locking lever that adopts plastics to make, can reduce the weight of this application hasp to reduce the weight of whole high altitude construction safety belt, alleviate the burden in operation personnel's the working process.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the invention, reference should be made to the embodiments illustrated in the drawings. Like reference numerals in the drawings refer to like parts. It will be appreciated by persons skilled in the art that the drawings are intended to illustrate preferred embodiments of the invention without any limiting effect on the scope of the invention, and that the various components in the drawings are not drawn to scale.

FIG. 1 is a schematic diagram of a safety catch according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a female buckle of a safety catch according to an embodiment of the present invention;

fig. 3 shows a partial structural schematic view of a safety catch according to an embodiment of the present invention.

Description of the reference numerals:

1. a female buckle; 11. a body; 12. a locking assembly; 121. a first lock lever; 1211. a first button; 122. a second lock lever; 1221. a second button; 123. a first torsion spring; 124. a second torsion spring; 2. a male buckle; 21. a through hole; 22. mounting holes; 3. hooking; 4. a housing; 41. a first vertical rod; 42. a second vertical rod; 43. a horizontal bar; 5. a recess; 6. and (4) a bump.

Detailed Description

Exemplary embodiments of the present disclosure are described below with reference to the accompanying drawings, in which various details of embodiments of the present disclosure are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". Unless specifically stated otherwise, the term "or" means "and/or". The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like may refer to different or the same object. Other explicit and implicit definitions are also possible below.

In order to at least partially solve one or more of the above problems and other potential problems, an embodiment of the disclosure provides a safety lock catch, as shown in fig. 1 to 3, including a female buckle 1 and a male buckle 2, wherein the female buckle 1 is provided with a square hook 3, the male buckle 2 is provided with a square through hole 21, the size of the hook 3 matches that of the through hole 21, and the hook 3 is connected to the through hole 21 in a fastening manner; the male buckle 2 is provided with two strip-shaped mounting holes 22 along the y direction for mounting a safety belt.

The female buckle 1 further comprises a locking assembly 12 and a shell 4; a first vertical rod 41, a second vertical rod 42 and a cross bar 43 are arranged on the inner surface of the housing 4; the housing 4, the first vertical rod 41, the second vertical rod 42, and the cross bar 43 are all made of plastic through integral forming, the first vertical rod 41 and the second vertical rod 42 are both in a circular boss shape, the top end of the first section of the first vertical rod 41 and the top end of the first section of the second vertical rod 42 are both connected with the inner surface of the housing 4, and the diameter of the first section of the first vertical rod 41 and the diameter of the first section of the second vertical rod 42 are respectively greater than the diameter of the second section of the first vertical rod 41 and the diameter of the second section of the second vertical rod 42.

The locking assembly 12 includes a first locking lever 121, a second locking lever 122, a first torsion spring 123, and a second torsion spring 124; the first and second lock levers 121 and 122 each include a straight section and an arc-shaped section connected to each other; the first torsion spring 123 and the second torsion spring 124 are respectively sleeved on the first vertical rod 41 and the second vertical rod 42, first free ends of the first torsion spring 123 and the second torsion spring 124 respectively abut against the cross bar 43, and second free ends of the first torsion spring 123 and the second torsion spring 124 respectively abut against arc-shaped section side walls of the first locking rod 121 and the second locking rod 122; the second sections of the first vertical rod 41 and the second vertical rod 42 pass through fixing holes provided on the first locking rod 121 and the second locking rod 122 to be fixed to the body 11 of the box 1, so that the first locking rod 121 and the second locking rod 122 can rotate in a plane parallel to the surface of the body 11 of the box 1; the first lock lever 121 and the second lock lever 122 are arranged such that their respective straight sections are brought close to each other and the arc-shaped sections are away from each other; a concave part 5 is arranged at the position where the end part of the straight section of the first locking rod 121 and the end part of the straight section of the second locking rod 122 are close to each other, a convex block 6 extends from the edge of the male buckle 2 close to the through hole 21, and the size of the convex block 6 is matched with that of the concave part 5; the end surface of the arc-shaped section of the first locking rod 121 is fixedly connected with a first button 1211, the end surface of the arc-shaped section of the second locking rod 122 is fixedly connected with a second button 1221, the top surface of the first button 1211 and the top surface of the second button 1221 are both inclined surfaces, and the inclined surfaces are arranged in a manner of inclining downwards towards the direction in which the first locking rod 121 and the second locking rod 122 deviate from each other; the first lock lever 121 and the first push button 1211, and the second lock lever 122 and the second push button 1221 are integrally formed of plastic.

An arc transition section extends from the body 11 of the female buckle 1 to the hook 3, and the size of the transition section along the y direction is larger than that of the through hole 21 along the y direction; the size from the wall of the through hole 21 to the edge of the male buckle 2 along the x direction is larger than the size from the connection line of the two end parts to the projection of the free end of the hook 3 on the body 11 along the x direction when the straight sections of the first locking rod 121 and the second locking rod 122 are separated, and is larger than the size from the hook 3 to the body 11 along the z direction.

The invention also discloses an embodiment and provides a safety lock catch which comprises a female buckle 1 and a male buckle 2, wherein the female buckle 1 is provided with a square hook 3, the male buckle 2 is provided with a square through hole 21, the size of the hook 3 is matched with that of the through hole 21, the hook 3 on the female buckle 1 is buckled and connected with the through hole 21 on the male buckle 2, and the male buckle 2 is provided with two strip-shaped mounting holes 22 along the y direction and used for mounting a safety belt.

The female buckle 1 also comprises a locking component 12 which is fixed on the body 11 of the female buckle 1 and can rotate in a plane parallel to the surface of the body 11 of the female buckle 1; the locking assembly 12 includes a first locking lever 121, a second locking lever 122 and an elastic member; the first lock lever 121 and the second lock lever 122 each include a straight section and an arc-shaped section connected to each other; the first lock lever 121 and the second lock lever 122 are arranged such that their respective straight sections are closely attached to each other and the arc-shaped sections are distant from each other; a concave part 5 is arranged at the position where the end part of the straight section of the first locking rod 121 and the end part of the straight section of the second locking rod 122 are close to each other, a convex block 6 extends from the edge of the male buckle 2 close to the through hole 21, and the size of the convex block 6 is matched with that of the concave part 5; the end surface of the arc-shaped section of the first locking rod 121 is fixedly connected with a first button 1211, the end surface of the arc-shaped section of the second locking rod 122 is fixedly connected with a second button 1221, the top surface of the first button 1211 and the top surface of the second button 1221 are both inclined surfaces, and the inclined surfaces are arranged in a manner of inclining downwards towards the direction in which the first locking rod 121 and the second locking rod 122 deviate from each other; the first locking rod 121 and the first button 1211, and the second locking rod 122 and the second button 1221 are all integrally formed by plastic; the elastic member may be a compression spring, and two ends of the compression spring are fixedly connected to the side surfaces of the first locking rod 121 and the second locking rod 122, which are close to each other, respectively.

The body 11 of the female buckle 1 extends towards the hook 3 to form a transition section, and the size of the transition section along the y direction is larger than that of the through hole 21 along the y direction; the size from the wall of the through hole 21 to the edge of the male buckle 2 along the x direction is larger than the size from the connection line of the two end parts to the projection of the free end of the hook 3 on the body 11 along the x direction when the straight sections of the first locking rod 121 and the second locking rod 122 are separated, and is larger than the size from the hook 3 to the body 11 along the z direction.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the market, or to enable others of ordinary skill in the art to understand the disclosure.

Claims

1. The utility model provides a safe hasp, includes box (1) and pin thread (2), and couple (3) on box (1) are connected its characterized in that with through-hole (21) lock that set up on pin thread (2): the female buckle (1) further comprises a locking assembly (12) and a shell (4); a first vertical rod (41), a second vertical rod (42) and a cross bar (43) are arranged on the inner surface of the shell (4); the locking assembly (12) comprises a first locking rod (121), a second locking rod (122), a first torsion spring (123) and a second torsion spring (124); the first locking rod (121) and the second locking rod (122) both comprise a straight section and an arc-shaped section which are connected with each other; a first torsion spring (123) and a second torsion spring (124) are respectively sleeved on the first vertical rod (41) and the second vertical rod (42), first free ends of the first torsion spring (123) and the second torsion spring (124) respectively abut against the cross bar (43), second free ends of the first torsion spring (123) and the second torsion spring (124) respectively abut against side walls of arc-shaped sections of the first locking rod (121) and the second locking rod (122), so that the first torsion spring (123) and the second torsion spring (124) provide torsional force for the first locking rod (121) and the second locking rod (122), and when the locking assembly is not operated, a straight section of the first locking rod (121) and a straight section of the second locking rod (122) are kept tightly closed; the first vertical rod (41) and the second vertical rod (42) penetrate through fixing holes formed in the first locking rod (121) and the second locking rod (122) and are fixed on the body (11) of the female buckle (1), so that the first locking rod (121) and the second locking rod (122) can rotate in a plane parallel to the surface of the body (11) of the female buckle (1); the first lock lever (121) and the second lock lever (122) are arranged such that their respective straight sections are brought close to each other and the curved sections are away from each other; a transition section extends from the body (11) of the female buckle (1) to the hook (3), and the size of the transition section along the y direction is larger than that of the through hole (21) along the y direction; the size from the wall of the through hole (21) to the edge of the male buckle (2) along the x direction is larger than the size from the connecting line of the two end parts to the projection of the free end of the hook (3) on the body (11) along the x direction when the straight section of the first locking rod (121) is separated from the straight section of the second locking rod (122), and is larger than the size from the hook (3) to the body (11) along the z direction.

2. A safety catch according to claim 1, wherein: concave part (5) have been seted up near the tip of the straight section of first locking pole (121) and the tip of the straight section of second locking pole (122) each other, and the edge that is close with through-hole (21) on pin thread (2) extends has lug (6), and the size of lug (6) and the size looks adaptation of concave part (5).

3. A safety catch according to claim 1, wherein: the shell (4) is made of plastic.

4. A safety catch according to claim 1, wherein: the end face of the arc-shaped section of the first locking rod (121) is fixedly connected with a first button (1211), and the end face of the arc-shaped section of the second locking rod (122) is fixedly connected with a second button (1221).

5. A safety catch according to claim 4, wherein: the top surface of the first button (1211) and the top surface of the second button (1221) are both inclined surfaces, and the inclined surfaces are inclined downwards towards the direction in which the first locking rod (121) and the second locking rod (122) are deviated from each other.

6. A safety catch according to claim 1, wherein: the first locking rod (121) and the second locking rod (122) are both made of plastics.

7. The utility model provides a safe hasp, includes box (1) and pin thread (2), and couple (3) on box (1) are connected its characterized in that with through-hole (21) lock that set up on pin thread (2): the female buckle (1) further comprises a locking assembly (12) which is fixed on the female buckle (1) body (11) and can rotate in a plane parallel to the surface of the female buckle (1) body (11); the locking assembly (12) comprises a first locking rod (121), a second locking rod (122) and an elastic piece; the first locking rod (121) and the second locking rod (122) both comprise a straight section and an arc-shaped section which are connected with each other; the first locking rod (121) and the second locking rod (122) are arranged to enable the straight sections of the first locking rod and the second locking rod to be attached to each other, and the arc-shaped sections of the first locking rod and the second locking rod to be away from each other; the elastic piece is connected between the arc sections of the first locking rod (121) and the second locking rod (122); a transition section extends from the body (11) of the female buckle (1) to the hook (3), and the size of the transition section along the y direction is larger than that of the through hole (21) along the y direction; the size from the wall of the through hole (21) to the edge of the male buckle (2) along the x direction is larger than the size from the connecting line of two end parts to the free end of the hook (3) to the projection of the body (11) along the x direction when the straight section of the first locking rod (121) and the straight section of the second locking rod (122) are separated, and is larger than the size from the hook (3) to the body (11) along the z direction.

8. A safety catch according to claim 7, wherein: concave part (5) have been seted up near the tip of the straight section of first locking pole (121) and the tip of the straight section of second locking pole (122) each other, and the edge that is close with through-hole (21) on pin thread (2) extends has lug (6), and the size of lug (6) and the size looks adaptation of concave part (5).

9. A safety catch according to claim 7, wherein: the elastic piece is a compression spring, and two ends of the compression spring are fixedly connected with the side faces, close to each other, of the arc sections of the first locking rod (121) and the second locking rod (122) respectively.

10. A safety catch according to claim 7, wherein: the end face of the arc-shaped section of the first locking rod (121) is fixedly connected with a first button (1211), and the end face of the arc-shaped section of the second locking rod (122) is fixedly connected with a second button (1221).