CN217642002U - Lock catch mechanism - Google Patents

Abstract

The utility model provides a locking mechanism, include: the device comprises a shell, a lock catch, a jump buckle, a first rotating shaft, a second rotating shaft, a first elastic piece and a second elastic piece, wherein the lock catch, the jump buckle, the first rotating shaft, the second rotating shaft, the first elastic piece and the second elastic piece are all arranged in the shell; the first rotating shaft is arranged below the second rotating shaft, and two ends of the first rotating shaft and the second rotating shaft are fixed on the inner wall of the shell; the lock catch is rotationally connected to the first rotating shaft; one end of the first elastic piece is abutted against the side surface of the lock catch, which is back to the second rotating shaft, and the other end of the first elastic piece is abutted against the inner wall of the shell; the jump buckle and the second elastic piece are arranged on the second rotating shaft in a penetrating way; one end of the second elastic piece is abutted with the jump buckle, and the other end of the second elastic piece is abutted with the inner wall of the shell; the lock catch is clamped with the jump buckle. The utility model provides a hasp among the latched device is detained with jumping through first elastic component and second elastic component, realizes the hasp and jumps the quick action of detaining to use with the switch cooperation that corresponds, realize opening fast and the quick closure of switch, and accomplish arc extinguishing switch arc-break.

Description

Lock catch mechanism

Technical Field

The utility model relates to a technical field of socket, concretely relates to latched device.

Background

With the development of economy and the improvement of environmental awareness, the countries are increasing the investment in the fields of clean energy such as photovoltaic energy, wind energy and the like in recent years. Therefore, in the near future, dc power distribution systems will be used in more and more actual production operation scenarios.

As is well known, the waveform of alternating current is a sinusoidal waveform, and zero points are passed every time one cycle passes. For the household plug, large electric arcs cannot be generated during normal plugging. Even if the load is large, the plug generates electric arcs in plugging, and the electric arcs can be automatically extinguished in the zero crossing point process of the circuit. However, direct current is different, and the direct current does not have a zero point, so that the whole circuit cannot extinguish the arc at the zero crossing point as the alternating current does. The direct current distribution system has the problems that electric arcs are difficult to extinguish and the service life of the plug is influenced by burning of pins of the electric arcs in the actual production process.

With the wide application of a direct current power distribution system, various direct current sockets gradually appear, and arc breaking by an arc extinguishing switch with self-locking and self-unlocking rapid actions is an important method for ensuring the service life of the sockets, but the problems of slow action and substandard effect after the action is finished exist in the existing equipment.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the effect is not up to standard after the switch action is slow and the action is accomplished in the existing equipment, the utility model provides a locking mechanism, include: the device comprises a shell, and a lock catch, a jump buckle, a first rotating shaft, a second rotating shaft, a first elastic piece and a second elastic piece which are all arranged in the shell;

the first rotating shaft is arranged below the second rotating shaft, and two ends of the first rotating shaft and the second rotating shaft are fixed on the inner wall of the shell;

the lock catch is rotationally connected to the first rotating shaft;

one end of the first elastic piece is abutted against the side surface of the lock catch, which is back to the second rotating shaft, and the other end of the first elastic piece is abutted against the inner wall of the shell;

the jump buckle and the second elastic piece are arranged on the second rotating shaft in a penetrating manner;

one end of the second elastic piece is abutted with the jump buckle, and the other end of the second elastic piece is abutted with the inner wall of the shell;

the lock catch is clamped with the jump buckle.

Preferably, the lock catch is of a U-shaped structure and comprises a clamping groove;

the clamping groove is formed in the middle of the lock catch;

the lock catch is clamped in the clamping groove.

Preferably, the latch further comprises a lug;

the lug is arranged at the end part of the lock catch.

Preferably, the lock catch further comprises a lock catch through hole;

the lock catch through hole is formed in the other end, away from the lug, of the lock catch;

the first rotating shaft penetrates through the lock catch through hole.

Preferably, the lock catch further comprises an elastic part limiting lug;

the elastic part limiting lug is arranged on the side wall of the lock catch, which is back to the second rotating shaft;

one end of the first elastic piece is sleeved outside the elastic piece limiting lug and is abutted against the lock catch.

Preferably, the jump buckle comprises a limiting groove;

a first bulge is arranged on the side wall of the limiting groove back to the opening of the limiting groove, and the first bulge is arranged opposite to one side wall of the limiting groove opening;

the first bulge is clamped with the clamping groove;

a second bulge extends from the other side wall of the opening of the limit groove along the opening direction;

one end of the second elastic piece is abutted to the limiting groove.

Preferably, the jump buckle is provided with a jump buckle through hole;

the second rotating shaft penetrates through the jump buckle through hole.

Preferably, the jump buckle is also provided with a swing arm.

Preferably, the first elastic element comprises a spring or a spring plate.

Preferably, the second elastic member includes a torsion spring.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a latching mechanism, include: the device comprises a shell, a lock catch, a jump buckle, a first rotating shaft, a second rotating shaft, a first elastic piece and a second elastic piece, wherein the lock catch, the jump buckle, the first rotating shaft, the second rotating shaft, the first elastic piece and the second elastic piece are all arranged in the shell; the first rotating shaft is arranged below the second rotating shaft, and two ends of the first rotating shaft and the second rotating shaft are fixed on the inner wall of the shell; the lock catch is rotationally connected to the first rotating shaft; one end of the first elastic piece is abutted against the side surface of the lock catch, which is back to the second rotating shaft, and the other end of the first elastic piece is abutted against the inner wall of the shell; the jump buckle and the second elastic piece are arranged on the second rotating shaft in a penetrating manner; one end of the second elastic piece is abutted with the jump buckle, and the other end of the second elastic piece is abutted with the inner wall of the shell; the lock catch is clamped with the jump buckle. The utility model provides a hasp among the latched device is detained with jumping through first elastic component and second elastic component, realizes the hasp and jumps the quick action of detaining to use with the switch cooperation that corresponds, realize opening fast and the quick closure of switch, and accomplish arc extinguishing switch arc-break.

Drawings

Fig. 1 is a schematic view of the overall structure of the latch mechanism of the present invention;

fig. 2 is a schematic view of the overall structure of the lock of the present invention;

fig. 3 is a schematic view of the overall structure of the jump buckle of the present invention;

fig. 4 is a schematic view of an assembly structure of the lock catch, the jump buckle and the housing of the present invention;

fig. 5 is a schematic view of a first internal structure of the socket of the present invention;

fig. 6 is a second structural diagram of the interior of the socket according to the present invention;

fig. 7 is a schematic view of the overall structure of the trip bar of the present invention;

fig. 8 is a schematic view of the overall structure of the crank of the present invention;

fig. 9 is a schematic view of the overall structure of the fixing base of the present invention;

fig. 10 is a schematic structural view illustrating the plug of the present invention mounted on the socket;

fig. 11 is a schematic view of the internal structure of the plug of the present invention inserted into the socket;

fig. 12 is a schematic view of the internal structure of the plug unplugged socket according to the present invention.

10, a socket; 20. a housing; 210. a first hole; 30. a conductive chuck; 310. a metal conductor; 320. a protective cover; 40. a latch mechanism; 410. locking; 411. a first rotating shaft; 412. a lug; 413. a card slot; 414. a first elastic member; 415. a lock catch through hole; 420. jumping and buckling; 421. a second rotating shaft; 422. a first bump; 423. a second bump; 424. swinging arms; 425. a limiting groove; 427. a second elastic member; 428. a jump button through hole; 460. a first stationary housing; 470. a second stationary housing; 480. a third stationary housing; 50. a switch; 510. a moving contact; 512. a movable contact; 520. static contact; 521. a stationary contact; 530. a trip bar; 531. a third rotating shaft; 532. a groove; 533. a second hole; 534. a first link; 540. a crank; 541. a fourth rotating shaft; 542. a third aperture; 543. a fourth aperture; 544. a fifth aperture; 545. a third elastic member; 546. a second link; 550. a fixed seat; 551. fixing the clamping groove; 552. a sixth hole; 553. a seventh hole; 554. a fifth rotating shaft; 60. a plug; 611. operating the boss; 612. a bevel; 613. and (4) a guard ring.

Detailed Description

The utility model discloses a locking mechanism, hasp among the device and jump the knot through first elastic component and second elastic component, realize the hasp and jump the quick action of detaining to use with the switch cooperation that corresponds, realize opening fast and the quick closure of switch, and accomplish arc extinguishing switch arc breaking.

Example 1:

a latch mechanism 40, as shown in fig. 1, comprising: the locking device comprises a shell 20, and a lock catch 410, a jump catch 420, a first rotating shaft 411, a second rotating shaft 421, a first elastic member 414 and a second elastic member 427 which are all arranged in the shell 20; the first rotating shaft 411 is disposed below the second rotating shaft 421, and two ends of the first rotating shaft and the second rotating shaft are fixed on the inner wall of the housing 20; the latch 410 is rotatably connected to the first rotating shaft 411; one end of the first elastic element 414 abuts against the side of the lock 410 facing away from the second rotating shaft 421, and the other end abuts against the inner wall of the housing 20; the jump buckle 420 and the second elastic element 427 are both arranged on the second rotating shaft 421; one end of the second elastic element 427 abuts against the jump button 420, and the other end abuts against the inner wall of the housing 20; the latch 410 is engaged with the jump latch 420.

The housing 20 includes a first fixing housing 460, a second fixing housing 470 and a third fixing housing 480, wherein the second fixing housing 470 is disposed between the first fixing housing 460 and the third fixing housing 480 and is clamped with the first fixing housing 460 and the third fixing housing 480, respectively.

As shown in fig. 2, the lock 410 is U-shaped, and includes a locking groove 413, a protruding lug 412 and a lock through hole 415; the clamping groove 413 is formed in the middle of the lock catch 410; the lock 410 is engaged with the engaging groove 413. The lug 412 is disposed at an end of the latch 410. The locking through hole 415 is formed at the other end of the locking buckle 410 away from the lug 412; the first shaft 411 is disposed through the locking through hole 415.

The latch 410 further comprises an elastic member limiting projection; the elastic element limiting projection is disposed on a side wall of the lock catch 410 facing away from the second rotating shaft 421; one end of the first elastic element 414 is sleeved outside the elastic element limiting bump and abuts against the latch 410.

As shown in fig. 3, the jump ring 420 includes a stopper groove 425; a first bulge is arranged on the side wall of the limiting groove 425 opposite to the opening, and the first bulge is opposite to one side wall of the opening of the limiting groove 425; the first protrusion is clamped with the clamping groove 413; a second protrusion extends from the other side wall of the opening of the limiting groove 425 along the opening direction; one end of the second elastic element 427 abuts against the limiting groove 425. The extending directions of the first protrusion and the second protrusion are the same, and the first protrusion and the second protrusion are disposed on the same side of the jump buckle 420.

The jump ring 420 is provided with a jump ring through hole 428, which is disposed on a side of the jump ring 420 departing from the first protrusion and the second protrusion. The second shaft 421 is disposed through the jump button through hole 428.

The jump ring 420 is also provided with a swing arm 424. The swing arm 424 extends in the same direction as the first and second projections.

The first elastic member 414 includes a spring or an elastic sheet. The second elastic member 427 includes a torsion spring.

As shown in fig. 4, 5 and 6, the latch 410 is disposed between the first fixing housing 460 and the second fixing housing 470 through the first rotating shaft 411, the first rotating shaft 411 passes through the latch through hole 415 on the latch 410, two ends of the first rotating shaft 411 are respectively fixed on the first fixing housing 460 and the second fixing housing 470, and the latch 410 can rotate around the first rotating shaft 411. The latch 410 is provided with a lug 412, the lug 412 can be respectively contacted with or separated from the second rotating shaft 421 and the operation boss 611 on the plug 60, the latch 410 is provided with a clamping groove 413, a first elastic member 414 is further arranged below the latch 410, one end of the first elastic member 414 is contacted with the latch 410, and the other end is fixed with the second fixed housing 470, so as to provide a restoring force for the latch 410. When the plug 60 is inserted into the socket 10 downwards, the operation boss 611 on the plug 60 contacts with the lug 412 of the latch 410, the operation boss 611 is provided with a slope 612, the slope 612 contacts with the lug 412 and provides a pushing force to the lug 412 towards the outside of the socket 10, under the action of the pushing force, the latch 410 rotates around the first rotating shaft 411 to give way for the insertion of the plug 60, at this time, the first elastic element 414 is compressed, and at the same time, one end of the jump catch 420 is clamped into the clamping groove 413. In this embodiment, the first elastic element 414 is a spring or a resilient plate.

The jump ring 420 is disposed between the first fixing housing 460 and the third fixing housing 480 through the second rotating shaft 421, a jump ring through hole 428 for allowing the second rotating shaft 421 to pass through is disposed on the jump ring 420, the second rotating shaft 421 passes through the jump ring through hole 428 on the jump ring 420, one end of the second rotating shaft 421 is fixed on the first fixing housing 460, the other end of the second rotating shaft 421 passes through the jump ring 420 and the second fixing housing 470 in sequence and then is fixed on the third fixing housing 480, and the jump ring 420 can rotate around the second rotating shaft 421. The side wall of the limiting groove 425 opposite to the opening thereof is provided with a first protrusion, the first protrusion is arranged opposite to one side wall of the opening of the limiting groove 425, the first protrusion 422 can be clamped into the clamping groove 413, the other side wall of the opening of the limiting groove 425 extends along the opening direction to form a second protrusion, and the second protrusion 423 can be in contact with the guard ring 613 of the plug 60, so that the first protrusion 422 can be clamped into the clamping groove 413 for locking. The jump buckle 420 is further provided with a swing arm 424, and when the swing arm 424 is unlocked when the first projection 422 is separated from the clamping groove 413, the swing arm 424 drives the trip rod 530 of the locking mechanism 40 to separate the trip rod 530. The jump ring 420 is further provided with a limiting groove 425.

The second elastic member 427 is further sleeved on the second rotating shaft 421, the second elastic member 427 and the jump buckle 420 are sequentially arranged along the second rotating shaft 421, in this embodiment, the second elastic member 427 is a torsion spring, two ends of the second elastic member 427 are respectively provided with a first fixing pin and a second fixing pin, the first fixing pin is fixed to the second fixing shell 470, and the second fixing pin is clamped into the limiting groove 425, so that the limiting of the second elastic member 427 is realized.

Example 2:

based on the same concept, the present invention further provides a socket 10, as shown in fig. 4, the socket 10 includes a housing 20, at least one first hole 210 is disposed on the housing 20, a conductive chuck 30, a locking mechanism 40 and a switch 50 are disposed in the housing 20, the conductive chuck 30 corresponds to the first hole 210 and is matched with the plug 60, and the locking mechanism 40 can drive the switch 50 to be closed or disconnected through the plug 60 under the action of external force.

As shown in fig. 5 and 6, a metal conductor 310 and a protective cap 320 are disposed on the conductive clip 30, the metal conductor 310 may form a clip-shaped groove 532 matched with the plug 60, and a conductive post of the plug 60 may be inserted into the clip-shaped groove 532 and contact with or separate from the metal conductor 310, thereby completing the connection or disconnection of the circuit. The metal conductor 310 includes a plurality of metal conductors 310 connected to the positive pole of the power source and metal conductors 310 connected to the negative pole of the power source, namely: the metal conductors 310 mate with the plug 60, and when the plug 60 is a two pin plug 60, the metal conductors 310 include two metal conductors 310; when the plug 60 is a three pin plug 60, the metal conductors 310 include three metal conductors 310. In the present embodiment, the plug 60 is a three pin plug 60.

The latch mechanism 40 includes a latch 410 and a jump buckle 420, and in order to fix the latch 410 and the jump buckle 420, the latch mechanism 40 further includes a first fixed housing 460, a second fixed housing 470 and a third fixed housing 480, wherein the second fixed housing 470 is disposed between the first fixed housing 460 and the third fixed housing 480 and is respectively fastened and fixed with the first fixed housing 460 and the third fixed housing 480.

The latch 410 is disposed between the first fixing housing 460 and the second fixing housing 470 through the first rotating shaft 411, a latch through hole 415 is disposed on the latch 410, the first rotating shaft 411 passes through the latch through hole 415 on the latch 410, two ends of the first rotating shaft 411 are respectively fixed on the first fixing housing 460 and the second fixing housing 470, and the latch 410 can rotate around the first rotating shaft 411. The latch 410 is provided with a lug 412, the lug 412 can be respectively contacted with or separated from the second rotating shaft 421 and the operation boss 611 on the plug 60, the latch 410 is provided with a clamping groove 413, the lower part of the latch 410 is further provided with a first elastic element 414, one end of the first elastic element 414 is contacted with the latch 410, and the other end is fixed with the second fixed housing 470, so as to provide a resetting force for the latch 410. Specifically, when the plug 60 is inserted into the socket 10 downward, the operating boss 611 contacts with the lug 412 of the latch 410, the operating boss 611 is provided with a slope 612, the slope 612 contacts with the lug 412 and can provide a pushing force to the lug 412 toward the outside of the socket 10, under the action of the pushing force, the latch 410 rotates around the first rotating shaft 411 to give way for the insertion of the plug 60, at this time, the first elastic element 414 is compressed, and at the same time, one end of the jumper 420 is clamped into the clamping groove 413. In this embodiment, the first elastic element 414 is a spring or a resilient sheet.

The jump ring 420 is disposed between the first fixing housing 460 and the third fixing housing 480 through the second rotating shaft 421, a jump ring through hole 428 for allowing the second rotating shaft 421 to pass through is disposed on the jump ring 420, the second rotating shaft 421 passes through the jump ring through hole 428 on the jump ring 420, one end of the second rotating shaft 421 is fixed on the first fixing housing 460, the other end of the second rotating shaft 421 passes through the jump ring 420 and the second fixing housing 470 in sequence and then is fixed on the third fixing housing 480, and the jump ring 420 can rotate around the second rotating shaft 421. One end of the jumper 420 is provided with a first protrusion 422, the first protrusion 422 can be clamped into the slot 413, the other end of the jumper 420 is provided with a second protrusion 423, and the second protrusion 423 can contact with the guard ring 613 of the plug 60, so that the first protrusion 422 can be clamped into the slot 413 for locking. The jump ring 420 is further provided with a swing arm 424, and when the swing arm 424 is unlocked when the first protrusion 422 is separated from the clamping groove 413, the swing arm 424 drives the trip bar 530 of the locking mechanism 40 to separate the trip bar 530. The jump ring 420 is further provided with a limiting groove 425.

Still the cover is equipped with second elastic component 427 on second pivot 421, and second elastic component 427 and jump knot 420 set gradually along second pivot 421, and is preferred, and second elastic component 427 is a torsional spring, and the both ends of second elastic component 427 are equipped with convex first fixed pin and second fixed pin respectively, and first fixed pin is fixed mutually with second fixed casing 470, and second fixed pin card is gone into in spacing groove 425 to realize the spacing of second elastic component 427.

The switch 50 includes a movable contact 510, a fixed contact 520, a trip bar 530, a first link 534, a crank 540, a second link 546, a fixed seat 550, and the like.

As shown in fig. 7, one end of the trip lever 530 is provided with a third rotating shaft 531, two ends of the third rotating shaft 531 are respectively clamped into the first fixed housing 460 and the third fixed housing 480, the trip lever 530 can rotate around the third rotating shaft 531, the other end of the trip lever 530 is provided with a groove 532 and a second hole 533, the groove 532 receives the swing arm 424 of the jump buckle 420 and receives the driving of the swing arm 424. A first link 534 is further disposed in the second hole 533 of the trip lever 530, the first link 534 is a U-shaped steel wire, and the other end of the first link 534 is connected to the third hole 542 of the crank 540.

As shown in fig. 8, a fourth rotating shaft 541 is disposed near the center of the crank 540, two ends of the fourth rotating shaft 541 are respectively clamped into the first fixed housing 460 and the third fixed housing 480, the crank 540 can rotate around the fourth rotating shaft 541, one end of the crank 540 is provided with a third hole 542 and a fourth hole 543, the other end of the crank 540 is provided with a fifth hole 544, the fifth hole 544 is provided with a third elastic member 545, the third elastic member 545 is a torsion spring, and the other end of the crank is fixed in the first fixed housing 460. The third hole 542 of the crank 540 is connected to the trip bar 530 through the first link 534, the second link 546 is disposed in the fourth hole 543, the second link 546 is a U-shaped steel wire, and the other end of the second link 546 is connected to the sixth hole 552 of the fixing base 550.

As shown in fig. 9, the fixed seat 550 is provided with a fixed slot 551, a sixth hole 552 and a seventh hole 553, the sixth hole 552 is connected to the crank 540 through the second link 546, the movable contact 510 is provided in the fixed slot 551, a fifth rotating shaft 554 is provided between the first fixed housing 460 and the third fixed housing 480 corresponding to the seventh hole 553, and the fixed seat 550 and the movable contact 510 can rotate around the fifth rotating shaft 554.

As shown in fig. 5 and 6, the other end of the movable contact 510 is provided with a movable contact 512, the stationary contact 520 is provided with a stationary contact 521, the stationary contact 521 is arranged at one end of the stationary contact 520, and the stationary contact 520 is clamped between the first fixed housing 460 and the third fixed housing 480.

The switch 50 may also be provided with a permanent blowing magnet, an arc striking angle and an arc extinguishing chamber.

To handle higher dc voltages, the switch 50 may further include more than one pair of moving contacts 510 connected in series with corresponding stationary contacts 520.

The specific implementation method comprises the following steps:

as shown in fig. 10 and 11, when the plug 60 is inserted into the receptacle 10, the plug 60 moves downward, first contacting with the inclined surface 612 of the shield 320, the shield 320 gives way to the plug 60 under the pushing force of the plug 60, the metal conductor 310 contacts with the pins of the plug 60, at this time, the plug 60 continues to move downward, the operation boss 611 on the protection ring 613 of the plug 60 contacts with the lug 412 of the latch 410, the inclined surface 612 on the operation boss 611 contacts with the lug 412 and can provide a pushing force to the lug 412 toward the outside of the receptacle 10, under the pushing force, the latch 410 rotates around the first rotating shaft 411, gives way for the insertion of the plug 60, the first elastic member 414 is compressed, and simultaneously, the second protrusion 423 of the jumper 420 rotates clockwise under the protection ring 613 of the plug 60, and simultaneously, the first protrusion 422 of the jumper 420 is clamped into the clamping groove 413, and the second elastic member 427 is compressed and stored energy. At this time, the latch mechanism 40 achieves self-locking.

When the plug 60 continues to move downwards, the lower edge of the insulating shell of the plug 60 presses the trip rod 530, the crank 540, the fixed seat 550, the first connecting rod 534 and the second connecting rod 546 form a multi-connecting-rod mechanism, and after the dead point of the mechanism is crossed, the switch 50 is quickly closed and self-locked, so that the switch 50 is switched on.

As shown in fig. 12, when the plug 60 is pulled out from the socket 10, the plug 60 moves upward, the inclined surface 612 on the operation boss 611 contacts with the lug 412 and can provide a pushing force to the lug 412 toward the outside of the socket 10, under the pushing force, the latch 410 rotates around the first rotating shaft 411, at this time, the first protrusion 422 of the jumper 420 disengages from the slot 413, under the elastic force of the second elastic member 427, the jumper 420 rotates around the second rotating shaft 421, and the latch mechanism 40 realizes self-unlocking.

After the locking mechanism 40 is unlocked, the swing arm 424 drives the trip bar 530 to rotate clockwise, when the multi-link mechanism crosses the mechanism dead point, the moving contact 510 and the fixed contact 520 are driven to be separated quickly, the switch 50 is kept in a disconnected state, the generated electric arc is extinguished quickly under the combined action of the arc extinguishing permanent magnet and the arc extinguishing chamber, and at this time, the whole socket 10 is in a disconnected state.

At this time, the plug 60 is continuously pulled out, and the pins of the plug 60 leave the metal conductors 310 of the socket 10, so that the plug 60 is pulled out without electricity, and the safety of the electric equipment is protected.

The above description is only exemplary of the invention and is not intended to limit the invention, and any modifications, equivalent alterations, improvements and the like which are made within the spirit and principle of the invention are all included in the scope of the claims which are appended hereto.

Claims (10)

1. A latch mechanism, comprising: the device comprises a shell (20), and a lock catch (410), a jump catch (420), a first rotating shaft (411), a second rotating shaft (421), a first elastic piece (414) and a second elastic piece (427) which are all arranged in the shell (20);

the first rotating shaft (411) is arranged below the second rotating shaft (421), and two ends of the first rotating shaft and the second rotating shaft are fixed on the inner wall of the shell (20);

the lock catch (410) is rotatably connected to the first rotating shaft (411);

one end of the first elastic element (414) abuts against the side surface of the lock catch (410) back to the second rotating shaft (421), and the other end abuts against the inner wall of the shell (20);

the jump buckle (420) and the second elastic piece (427) are arranged on the second rotating shaft (421) in a penetrating way;

one end of the second elastic element (427) is abutted with the jump buckle (420), and the other end is abutted with the inner wall of the shell (20);

the lock catch (410) is clamped with the jump buckle (420).

2. A latching mechanism according to claim 1, wherein the latch (410) is U-shaped and comprises a slot (413);

the clamping groove (413) is formed in the middle of the lock catch (410);

the lock catch (410) is clamped in the clamping groove (413).

3. A latch mechanism according to claim 2, wherein the latch (410) further comprises a lug (412);

the lug (412) is arranged at the end part of the lock catch (410).

4. A latch mechanism according to claim 3, wherein said latch (410) further comprises a latch through hole (415);

the lock catch through hole (415) is formed in the other end, away from the lug (412), of the lock catch (410);

the first rotating shaft (411) penetrates through the lock catch through hole (415).

5. A latch mechanism according to claim 4, wherein the latch (410) further comprises a resilient member retaining projection;

the elastic element limiting lug is arranged on the side wall of the lock catch (410) back to the second rotating shaft (421);

one end of the first elastic element (414) is sleeved outside the elastic element limiting lug and is abutted against the lock catch (410).

6. A snapping mechanism according to claim 2, wherein said jump ring (420) comprises a retaining groove (425);

a first bulge is arranged on the side wall of the limiting groove (425) back to the opening of the limiting groove, and the first bulge is opposite to one side wall of the opening of the limiting groove (425);

the first bulge is clamped with the clamping groove (413);

a second protrusion extends from the other side wall of the opening of the limiting groove (425) along the opening direction;

one end of the second elastic element (427) is abutted to the limiting groove (425).

7. The locking mechanism as claimed in claim 6, wherein the jump button (420) has a jump button through hole (428);

the second rotating shaft (421) penetrates through the jump buckle through hole (428).

8. A latch mechanism according to claim 6, characterized in that the jump buckle (420) is further provided with a swing arm (424).

9. A latching mechanism according to claim 1, wherein said first resilient member (414) comprises a spring or a leaf spring.

10. A latching mechanism according to claim 1, wherein said second resilient member (427) comprises a torsion spring.

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