CN215226227U - Locking mechanism of folding bed frame - Google Patents

Abstract

The utility model discloses a locking mechanism of a folding bed frame; the foldable bed frame comprises a handrail assembly, a top angle assembly, a footing assembly and a middle seat, wherein a first quadrangle is formed by a joint iron sheet, a first handrail tube, a first connecting rod and a first connecting piece, and a second quadrangle is formed by the joint iron sheet, a second handrail tube, a second connecting rod and a second connecting piece; the utility model discloses a through first connecting rod, first connecting piece, the lock is pull in first pole setting, first round pin that resets, the second resets, reset spring seat and first reset spring's mutually supporting, effectively improved folding bed frame stability when opening and security and furthest carry out the folding space-saving to the bed frame, solved current bed frame and not have the auto-lock structure probably exist after opening and lead to the loose or folding danger of bed frame and when folding it because of rocking, often just can realize folding and can not fold the space increase that the messenger occupied completely through pressing down a plurality of switches.

Description

Locking mechanism of folding bed frame

Technical Field

The utility model belongs to the technical field of locking mechanism, specifically be a locking mechanism of folding bedstead.

Background

The folding bed frame is designed by utilizing the joint principle, is mainly used in places such as outdoor rest, noon break of offices and the like, is convenient and saves the volume space, can be folded and folded in various folding modes, is convenient and practical, and is convenient to store;

in the prior art, the traditional bed frame is generally fixed, is inconvenient to carry and occupies a large space, and most of locking mechanisms of the existing folding bed frame have no self-locking function, so that the bed frame is possibly loosened or folded due to shaking after being opened, and the stability and the safety are not realized; when folding it, current folding bedstead often can realize folding and can not fold the space increase that makes to occupy through pressing a plurality of switches and lead to further extravagant, waste time and energy like this to can lead to occupying very big space inconvenient carrying because of folding inadequately.

To this end, we propose a locking mechanism for a folding bed frame.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pair of locking mechanism of folding bedstead for the locking mechanism who solves folding bedstead among the prior art does not have self-locking function mostly, not only greatly reduced folding bedstead in stability and security, often can forget the problem of locking the unexpected danger that locking mechanism caused moreover after the user opens folding bedstead.

The purpose of the utility model can be realized by the following technical scheme: a locking mechanism of a folding bed frame comprises the folding bed frame, the folding bed frame comprises a handrail component, a top angle component, a footing component and a middle seat, the handrail component comprises a first folding component, a second folding component, a joint iron sheet and a reset component, the footing component and the middle seat are rotatably connected through a first bottom support rod and a second bottom support rod, a first handrail tube and a second handrail tube are symmetrically installed at the top of the joint iron sheet, one ends of the first handrail tube and the second handrail tube are both installed on the second folding component, the first handrail tube is rotatably connected with a first connecting rod, the second handrail tube is rotatably connected with a second connecting rod, the first connecting rod is rotatably connected with a first connecting piece, the second connecting rod is rotatably connected with a second connecting piece, a first upright rod traction lock and a second upright rod traction lock are respectively connected between the first folding component and the correspondingly arranged footing component, the joint iron sheet, the first handrail tube, the first connecting rod and the first connecting piece form a first quadrangle, the joint iron sheet, the second handrail tube, the second connecting rod and the second connecting piece form a second quadrangle, the first upright rod traction lock is fixedly connected with the second quadrangle, the second upright rod traction lock is fixedly connected with the first quadrangle, and the reset assembly is installed inside the joint iron sheet;

first handrail pipe rotates through first bolt and connects at joint iron sheet, the second handrail pipe rotates through the second bolt and connects at joint iron sheet, first handrail pipe rotates through first fixed pin with first connecting rod and is connected, the second handrail pipe all rotates through the second fixed pin with the second connecting rod and is connected, first connecting rod rotates through the third fixed pin with first connecting piece and is connected, the second connecting rod rotates through the fourth fixed pin with the second connecting piece and is connected, first connecting piece rotates through the third bolt and connects joint iron sheet, the second connecting piece rotates through the fourth bolt and connects joint iron sheet.

Furthermore, the bottom foot component comprises a bottom foot, a first bottom support rod, a second bottom support rod and a traction lock fixing block, the first bottom support rod and the second bottom support rod are rotatably connected with the inner wall of the bottom foot, one end, far away from the bottom foot, of the first bottom support rod is rotatably connected with the upper middle base, one end, far away from the bottom foot, of the second bottom support rod is rotatably connected with one end of the support rod, and the other end of the support rod is rotatably connected with the lower middle base.

Furthermore, well seat comprises well seat and well seat down in last, go up the inside spring bolt and the second reset spring that is provided with of well seat, the one end of spring bolt is connected with the stay cord, one side fixed connection of one end and the spring bolt of second reset spring, the other end of second reset spring and the inner wall fixed connection of last well seat, spring bolt and second reset spring cooperate, go up well seat and well seat down and pass through the spring bolt joint and connect.

Further, draw the lock fixed block and rotate with the footing inner wall and be connected, first end vaulting pole with draw the lock fixed block and cooperate, the apex angle subassembly includes the apex angle casing, the one end that handrail subassembly was kept away from to first handrail pipe and second handrail pipe rotates and is connected with the apex angle casing, the notch corresponding with the support is all seted up to the inside of apex angle casing and footing, the both ends of support all are pegged graft in the notch, apex angle casing and footing pass through support fixed connection.

Furthermore, one end of the first vertical rod traction lock and one end of the second vertical rod traction lock are respectively fixedly connected with the traction lock fixing blocks correspondingly arranged, the other end of the first vertical rod traction lock is fixedly connected with the second folding assembly, the other end of the second vertical rod traction lock is fixedly connected with the first folding assembly, the first folding assembly comprises a first connecting rod and a first connecting piece, the second folding assembly comprises a second connecting rod and a second connecting piece, the resetting assembly comprises a first resetting pin, a second resetting pin, a resetting spring seat and a first resetting spring, the first resetting pin and the second resetting pin are symmetrically arranged in the resetting assembly, a first resetting spring is arranged in the first resetting pin and the second resetting pin, and one end of the first resetting spring, which is far away from the first resetting pin and the second resetting pin, penetrates through the resetting spring seat and extends into the resetting spring seat, the inside symmetry of reset spring seat has seted up the spout, first round pin that resets and second reset round pin sliding connection are in the spout.

The utility model has the advantages that:

the safety of the internal structure of the locking mechanism is effectively protected through the arrangement of the joint iron sheets, the problem that the mechanical structure is damaged due to the fact that the mechanical structure is exposed to the external environment is solved, the folding of the bedstead and the steps of folding and unfolding of the bedstead are greatly reduced through the mutual matching of the lock tongue connected with the pull rope, the second reset spring, the upper middle seat and the lower middle seat, the problem that the bedstead cannot be stored fixedly in the prior art or the prior folding bedstead is folded through complicated steps and wastes time and labor during folding is solved, the effect of increasing stability due to the fact that the first vertical rod traction lock and the second vertical rod traction lock are loosened, the problems that the time and labor are wasted when the folding bedstead is loosened and the problem that the bedstead is loosened due to the unstable connection can occur in the prior art are solved through the mutual matching of the first bottom support rod and the traction lock fixing block, through mutually supporting between first connecting rod, second connecting rod, first connecting piece, second connecting piece, first reset spring, reset spring seat and first pin and the second that resets, realized that folding assembly is inside folding, thereby convenient further folding the bedstead has solved among the prior art and can not be more complete folding occupy very big space to the bedstead problem.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a structural schematic diagram of the locking mechanism of the present invention in an open state;

fig. 2 is a schematic structural view of the locking mechanism in a folded state;

fig. 3 is a structural schematic diagram of the locking mechanism of the present invention in an open state;

FIG. 4 is a schematic view of the open state of the foldable bed frame of the present invention;

FIG. 5 is a schematic view of the inside cross-section of the bottom foot structure of the open state bed frame of the present invention;

FIG. 6 is a schematic view of a three-dimensional cross-sectional structure of the bottom leg of the open bedstead according to the present invention;

FIG. 7 is a schematic view of a folded bottom foot of the bed frame according to the present invention;

FIG. 8 is a schematic view of the seat structure of the bed frame of the present invention in an open state;

FIG. 9 is a schematic view of a structure of the bed frame of the present invention in a state of separating the middle seat;

fig. 10 is an enlarged schematic view of the footing assembly of the present invention;

fig. 11 is an enlarged schematic view of the armrest assembly of the present invention;

fig. 12 is an enlarged schematic view of the top corner module of the present invention;

fig. 13 is an enlarged schematic view of the middle seat of the present invention;

fig. 14 is an enlarged schematic view of the first folding assembly of the present invention;

fig. 15 is an enlarged schematic view of a second folding assembly according to the present invention;

FIG. 16 is a schematic structural view of the state of the traction lock outside the handrail tube according to the present invention;

fig. 17 is a structural schematic view of the bed frame of the present invention in a fully folded state;

fig. 18 is a side view of the fully folded bed frame of the present invention.

In the figure: 1. a folding bed frame; 2. joint iron sheets; 3. a first handrail tube; 4. a second handrail tube; 5. a first link; 6. a second link; 7. a first connecting member; 8. a second connecting member; 9. a first upright traction lock; 10. a second upright rod traction lock; 1101. a first reset pin; 1102. a second reset pin; 12. a return spring seat; 13. a first return spring; 1401. a first latch; 1402. a second bolt; 1501. a first fixing pin; 1502. a second fixing pin; 1601. a third fixing pin; 1602. a fourth fixing pin; 1701. a third bolt; 1702. a fourth bolt; 100. a first folding assembly; 101. a second folding assembly; 102. a vertex angle housing; 103. footing; 104. an upper middle seat; 105. a lower middle seat; 106. a support; 1031. a first bottom stay; 1032. a second bottom stay; 1033. a traction lock fixing block; 1034. a support bar; 1041. a latch bolt; 1042. a second return spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-18, the present invention provides a technical solution: a locking mechanism of a folding bed frame comprises the folding bed frame 1, the folding bed frame 1 comprises a handrail component, a top angle component, a footing component and a middle seat, the handrail component comprises a first folding component 100, a second folding component 101, a joint iron sheet 2 and a reset component, the joint iron sheet 2 effectively protects the safety of the internal structure of the locking mechanism and prevents the mechanical structure from being damaged, the footing component and the middle seat are rotationally connected through a first bottom support rod 1031 and a second bottom support rod 1032, a first handrail tube 3 and a second handrail tube 4 are symmetrically installed at the top of the joint iron sheet 2, one end of the first handrail tube 3 and one end of the second handrail tube 4 are both installed on the second folding component 101, the first handrail tube 3 is rotationally connected with a first connecting rod 5, the second handrail tube 4 is rotationally connected with a second connecting rod 6, the second connecting rod 6 conveniently drives a second connecting piece 8 to rotate, the first connecting rod 5 is rotationally connected with a first connecting piece 7, the second connecting rod 6 is rotatably connected with the second connecting piece 8, a first upright rod traction lock 9 and a second upright rod traction lock 10 are respectively connected between the first folding assembly 100 and the second folding assembly 101 and correspondingly arranged foot components, the first upright rod traction lock 9 and the second upright rod traction lock 10 can be connected with the first folding assembly 100 and the second folding assembly 101 through the inner cavities of the first handrail tube 3 and the second handrail tube 4, or can be connected with the first folding assembly 100 and the second folding assembly 101 outside the first handrail tube 3 and the second handrail tube 4, the joint iron sheet 2, the first handrail tube 3, the first connecting rod 5 and the first connecting piece 7 form a first quadrangle, the joint iron sheet 2, the second handrail tube 4, the second connecting rod 6 and the second connecting piece 8 form a second quadrangle, the stability and the safety of the folding bed frame 1 can be automatically locked and improved when the folding bed frame 1 is opened, and the first traction lock 9 and the second quadrangle are fixedly connected, the second vertical rod traction lock 10 is fixedly connected with the first quadrangle, and a reset component is arranged in the joint iron sheet 2;

the first handrail tube 3 is rotatably connected to the joint iron sheet 2 through a first bolt 1401, the second handrail tube 4 is rotatably connected to the joint iron sheet 2 through a second bolt 1402, the first handrail tube 3 is rotatably connected with the first connecting rod 5 through a first fixing pin 1501, the second handrail tube 4 is rotatably connected with the second connecting rod 6 through a second fixing pin 1502, the first connecting rod 5 is rotatably connected with the first connecting piece 7 through a third fixing pin 1601, the second connecting rod 6 is rotatably connected with the second connecting piece 8 through a fourth fixing pin 1602, the first connecting piece 7 is rotatably connected with the joint iron sheet 2 through a third bolt 1701, and the second connecting piece 8 is rotatably connected with the joint iron sheet 2 through a fourth bolt 1702;

the bottom foot component comprises a bottom foot 103, a first bottom support bar 1031, a second bottom support bar 1032 and a traction lock fixing block 1033, wherein the first bottom support bar 1031 and the second bottom support bar 1032 are rotatably connected with the inner wall of the bottom foot 103, one end of the first bottom support bar 1031, which is far away from the bottom foot 103, is rotatably connected with an upper middle base 104, one end of the second bottom support bar 1032, which is far away from the bottom foot 103, is rotatably connected with one end of a support bar 1034, and the other end of the support bar 1034 is rotatably connected with a lower middle base 105;

the middle seat is composed of an upper middle seat 104 and a lower middle seat 105, a bolt 1041 and a second return spring 1042 are arranged inside the upper middle seat 104, one end of the bolt 1041 is connected with a pull rope, one end of the second return spring 1042 is fixedly connected with one side of the bolt 1041, the other end of the second return spring 1042 is fixedly connected with the inner wall of the upper middle seat 104, the bolt 1041 is matched with the second return spring 1042, the upper middle seat 104 and the lower middle seat 105 are connected in a clamping mode through the bolt 1041, the bolt 1041 can be separated from the clamping position of the upper middle seat 104 and the lower middle seat 105 by pulling the pull rope, so that the upper middle seat 104 is separated from the lower middle seat 105, and at the moment, the first upright rod traction lock 9 and the second upright rod traction lock 10 are loosened, so that the bedstead can be conveniently folded and stably opened;

the traction lock fixing block 1033 is rotatably connected with the inner wall of the bottom foot 103, the first bottom support rod 1031 is matched with the traction lock fixing block 1033, the vertex angle component comprises a vertex angle shell 102, one ends, far away from the handrail component, of the first handrail tube 3 and the second handrail tube 4 are rotatably connected with the vertex angle shell 102, notches corresponding to the support 106 are formed in the vertex angle shell 102 and the bottom foot 103, two ends of the support 106 are inserted in the notches, and the vertex angle shell 102 and the bottom foot 103 are fixedly connected through the support 106, so that the stability of the support 106 is kept when the bedstead is folded and unfolded;

one end of each of the first upright traction lock 9 and the second upright traction lock 10 is fixedly connected with a corresponding traction lock fixing block 1033, the other end of the first upright traction lock 9 is fixedly connected with the second folding assembly 101, the other end of the second upright traction lock 10 is fixedly connected with the first folding assembly 100, the first folding assembly 100 comprises a first connecting rod 5 and a first connecting piece 7, the second folding assembly 101 comprises a second connecting rod 6 and a second connecting piece 8, the resetting assembly comprises a first resetting pin 1101, a second resetting pin 1102, a resetting spring seat 12 and a first resetting spring 13, the resetting assembly is internally and symmetrically provided with the first resetting pin 1101 and the second resetting pin 1102, the first resetting spring 13 is installed inside the first resetting pin 1101 and the second resetting pin 1102, one end of the first resetting spring 13, which is far away from the first resetting pin 1101 and the second resetting pin 1101, penetrates through the resetting spring seat 12 and extends into the resetting spring seat 12, sliding grooves are symmetrically formed in the reset spring seat 12, the first reset pin 1101 and the second reset pin 1102 are connected in the sliding grooves in a sliding mode, the first reset pin 1101 and the second reset pin 1102 are respectively jacked on the first folding assembly 100 and the second folding assembly 101 by the first reset spring 13, the first folding assembly 100 and the second folding assembly 101 cross dead points, the first quadrangle and the second quadrangle are unlocked and can be folded, and the first handrail tube 3 and the second handrail tube 4 rotate mutually;

the working principle is as follows:

when the bed frame is used, firstly, the middle base 105 is pressed down, since the lengths of the first bottom brace 1031 and the second bottom brace 1032 are not changed, as the lower middle base 105 moves downwards, the first bottom brace 1031 and the second bottom brace 1032 will mutually cooperate to push the four feet 103 to move around until the open state, at this time, the first bottom brace 1031 will prop against the traction lock fixing block 1033, meanwhile, the upper middle base 104 is inserted into the lower middle base 105, at this time, the bolt 1041 is clamped between the upper middle base 104 and the lower middle base 105 by the pushing of the second return spring 1042, so that the first upright rod traction lock 9 and the second upright rod traction lock 10 are in the tensioned state, thereby the first upright rod traction lock 9 and the second upright rod traction lock 10 pull the second connecting rod 6 and the first connecting rod 5 corresponding thereto, or the first upright rod traction lock 9 and the second upright rod traction lock 10 pull the second connecting member 8 and the first connecting member 7 corresponding thereto, the rotation of the first connecting piece 7 and the second connecting piece 8 can drive the corresponding first connecting piece 5 and the second connecting piece 6 to rotate, or the rotation of the first connecting piece 5 and the second connecting piece 6 can drive the corresponding first connecting piece 7 and the second connecting piece 8 to rotate, so that the first handrail tube 3 and the second handrail tube 4 which are rotatably connected with the first connecting piece 5 and the second connecting piece 6 through the first fixing pin 1501 and the second fixing pin 1502 are in an open state, the handrail assembly and the top foot assembly are in an open state, at the moment, the first connecting piece 5, the second connecting piece 6, the first connecting piece 7 and the second connecting piece 8 are in a dead point passing state, the first reset pin 1101 and the second reset pin 1102 slide inwards along a sliding groove in the reset spring seat 12 to limit, at the moment, the joints are locked, and thus the purpose of opening the bed frame is achieved;

when the utility model is folded, the latch 1041 is pulled by the pull rope to separate the upper middle seat 104 from the lower middle seat 105, the upper middle seat 104 and the lower middle seat 105 are pulled upwards to rotate the first bottom brace 1031 and the second bottom brace 1032 which are rotatably connected inside the bottom 103, the rotation of the first bottom brace 1031 drives the traction lock fixing block 1033 to rotate, so that the first upright traction lock 9 and the second upright traction lock 10 are in a loose state, the bottom 103 can move towards the middle seat along with the folding of the first bottom brace 1031 and the second bottom brace 1032, and simultaneously drives the top angle shell 102 connected on the bracket 106 to synchronously move, the first return spring 13 makes the first return pin 1101 and the second return pin 1102 respectively abut against the corresponding first folding assembly 100 and the second folding assembly 101, so that the first folding assembly 100 and the second folding assembly 101 cross dead points, thereby making the first quadrangle and the second unlocking folded, the first bolt 1401 and the second bolt 1402 rotate to drive the first handrail tube 3 and the second handrail tube 4 connected to the joint iron sheet 2 to rotate, thereby completing the folding of the bed frame.

The foregoing is merely exemplary and illustrative of the structure of the invention, and various modifications, additions and substitutions as described in the detailed description may be made by those skilled in the art without departing from the structure or exceeding the scope of the invention as defined in the claims.

Claims (5)

1. A locking mechanism of a folding bed frame comprises the folding bed frame (1), wherein the folding bed frame (1) comprises an armrest component, a top angle component, a bottom foot component and a middle seat, the armrest component comprises a first folding component (100), a second folding component (101), an articulated iron sheet (2) and a resetting component, and the locking mechanism is characterized in that: the foot component and the middle seat are rotatably connected through a first bottom support rod (1031) and a second bottom support rod (1032), a first handrail tube (3) and a second handrail tube (4) are symmetrically installed at the top of the joint iron sheet (2), one ends of the first handrail tube (3) and the second handrail tube (4) are installed on a second folding component (101), the first handrail tube (3) is rotatably connected with a first connecting rod (5), the second handrail tube (4) is rotatably connected with a second connecting rod (6), the first connecting rod (5) is rotatably connected with a first connecting piece (7), the second connecting rod (6) is rotatably connected with a second connecting piece (8), the first folding component (100) and the second folding component (101) are respectively connected with a first upright rod traction lock (9) and a second upright rod traction lock (10) between the foot component which is correspondingly arranged, the joint iron sheet (2), The first handrail tube (3), the first connecting rod (5) and the first connecting piece (7) form a first quadrangle, the joint iron sheet (2), the second handrail tube (4), the second connecting rod (6) and the second connecting piece (8) form a second quadrangle, the first vertical rod traction lock (9) is fixedly connected with the second quadrangle, the second vertical rod traction lock (10) is fixedly connected with the first quadrangle, and the joint iron sheet (2) is internally provided with a reset assembly;

the first handrail tube (3) is rotatably connected with the joint iron sheet (2) through a first bolt (1401), the second handrail tube (4) is rotationally connected with the joint iron sheet (2) through a second bolt (1402), the first handrail tube (3) is rotationally connected with the first connecting rod (5) through a first fixing pin (1501), the second handrail tube (4) and the second connecting rod (6) are rotationally connected through a second fixing pin (1502), the first connecting rod (5) is rotatably connected with the first connecting piece (7) through a third fixing pin (1601), the second connecting rod (6) is rotationally connected with the second connecting piece (8) through a fourth fixing pin (1602), the first connecting piece (7) is rotationally connected with the joint iron sheet (2) through a third bolt (1701), the second connecting piece (8) is rotatably connected with the joint iron sheet (2) through a fourth bolt (1702).

2. The locking mechanism of a foldable bed frame as set forth in claim 1, wherein: the bottom foot component comprises a bottom foot (103), a first bottom support rod (1031), a second bottom support rod (1032) and a traction lock fixing block (1033), wherein the first bottom support rod (1031) and the second bottom support rod (1032) are rotatably connected with the inner wall of the bottom foot (103), one end, away from the bottom foot (103), of the first bottom support rod (1031) is rotatably connected with an upper middle base (104), one end, away from the bottom foot (103), of the second bottom support rod (1032) is rotatably connected with one end of a support rod (1034), and the other end of the support rod (1034) is rotatably connected with a lower middle base (105).

3. The locking mechanism of a foldable bed frame as set forth in claim 1, wherein: well seat comprises well seat (104) and well seat (105) down, go up well seat (104) inside spring bolt (1041) and the second reset spring (1042) of being provided with, the one end of spring bolt (1041) is connected with the stay cord, the one end of second reset spring (1042) and one side fixed connection of spring bolt (1041), the other end of second reset spring (1042) and the inner wall fixed connection of well seat (104) on, spring bolt (1041) and second reset spring (1042) cooperate, go up well seat (104) and well seat (105) down and connect through spring bolt (1041) joint.

4. The locking mechanism of a foldable bed frame as set forth in claim 2, wherein: draw lock fixed block (1033) and footing (103) inner wall to rotate and be connected, first bottom vaulting pole (1031) cooperatees with drawing lock fixed block (1033), and the apex angle subassembly includes apex angle casing (102), the one end that handrail subassembly was kept away from in first handrail pipe (3) and second handrail pipe (4) is rotated and is connected with apex angle casing (102), the notch corresponding with support (106) has all been seted up to the inside of apex angle casing (102) and footing (103), the both ends of support (106) all are pegged graft in the notch, apex angle casing (102) and footing (103) are through support (106) fixed connection.

5. The locking mechanism of a foldable bed frame as set forth in claim 1, wherein: one end of each of the first vertical rod traction lock (9) and the second vertical rod traction lock (10) is fixedly connected with a traction lock fixing block (1033) which is correspondingly arranged, the other end of the first vertical rod traction lock (9) is fixedly connected with the second folding assembly (101), the other end of the second vertical rod traction lock (10) is fixedly connected with the first folding assembly (100), the first folding assembly (100) comprises a first connecting rod (5) and a first connecting piece (7), the second folding assembly (101) comprises a second connecting rod (6) and a second connecting piece (8), the resetting assembly comprises a first resetting pin (1101), a second resetting pin (1102), a resetting spring seat (12) and a first resetting spring (13), the first resetting pin (1101) and the second resetting pin (1102) are symmetrically arranged in the resetting assembly, the first resetting spring (13) is arranged in the first resetting pin (1101) and the second resetting pin (1102), one end, far away from the first reset pin (1101) and the second reset pin (1102), of the first reset spring (13) penetrates through the reset spring seat (12) and extends to the interior of the reset spring seat (12), sliding grooves are symmetrically formed in the interior of the reset spring seat (12), and the first reset pin (1101) and the second reset pin (1102) are connected in the sliding grooves in a sliding mode.

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