A lock body structure and method for preventing accidental anti-locking of a door

Abstract

The present invention discloses a lock body structure and method for preventing accidental locking of a door, belonging to the technical field of door locks, the structure comprises a lock body cover, a handle assembly rotatably mounted on the side of the lock body cover, a lock tongue assembly matched with the lock body cover, a first elastic reset device connecting the lock tongue assembly and the lock body cover, a taper hole matched with a wedge surface is formed on the pull rod head, a toggle pin is eccentrically arranged on a sliding pin block relative to the taper hole, the handle assembly can drive the cam pull frame to move after rotation, a stop pin is used to stop the handle assembly, when the lock tongue drives the pull rod head to move, the pull rod head can act on the toggle pin, the toggle pin drives the sliding pin block to move, so that the stop pin is separated from the handle assembly. The present invention and method can solve the problem that people outside the door cannot open the door in time to help others due to the situation that the door is locked, and there are certain safety hazards.

Description

Technical Field

[0001] The present invention belongs to the technical field of door locks, and particularly relates to a lock body structure and method capable of preventing accidental anti-locking of a door. Background Art

[0002] Existing traditional door locks are diverse, and the traditional door lock body is prone to anti-locking when the door is closed. When a person closes the door by hand, it is easy to accidentally press the anti-lock button, resulting in the door being anti-locked. If there is an emergency with a child or an elderly person inside the room, since children and the elderly do not know how to unlock, people outside the door will not be able to open the door in time to help others due to the anti-locked door, posing a certain safety hazard. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a lock body structure and method capable of preventing accidental anti-locking of a door, which can solve the above technical problems.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A lock body structure capable of preventing accidental anti-locking of a door disclosed by the present invention includes a lock body outer cover, a handle assembly rotatably installed on the side of the lock body outer cover, a lock tongue assembly cooperatively connected with the lock body outer cover, and a first elastic reset device connecting the lock tongue assembly and the lock body outer cover. The lock tongue assembly includes a lock tongue head, a lock tongue pull rod, a pull rod head, a second elastic reset device, and a cam pull frame. The cam pull frame is slidably installed in the lock body outer cover. One end of the lock tongue pull rod is connected to the lock tongue head, and the other end of the lock tongue pull rod slidably extends into the cam pull frame and is then connected to the pull rod head. A second elastic reset device is connected between the lock tongue head and the cam pull frame. The lock body outer cover is also connected with a stop assembly. The stop assembly includes a stop pin seat installed in the lock body outer cover, a sliding pin block slidably installed in the stop pin seat, and a stop pin provided on one side of the sliding pin block. A toggle pin is provided on the other side of the sliding pin block away from the stop pin. A wedge surface is formed on the surface of the toggle pin, and a tapered hole cooperating with the wedge surface is formed on the pull rod head. The toggle pin is eccentrically arranged relative to the tapered hole on the sliding pin block. The handle assembly can drive the cam pull frame to displace after rotation. The stop pin is used to stop the handle assembly. When the lock tongue head drives the pull rod head to displace, the pull rod head can act on the toggle pin, and the toggle pin drives the sliding pin block to displace, so that the stop pin is disengaged from the handle assembly.

[0006] Further, a through hole is opened on the sliding pin block, and an elastic support device is installed in the through hole. Both ends of the elastic support device are connected with steel balls, which protrude from the orifice of the through hole. The stop pin seat is provided with a first limit hole and a second limit hole cooperating with the steel balls.

[0007] Furthermore, the stop pin seat is also connected to a locking push rod, and the locking push rod extends from the lock body outer cover.

[0008] Further, the handle assembly includes a first door handle and a second door handle that are rotatably connected on both sides of the lock body outer cover, respectively, the first door handle and the second door handle are respectively connected to the first split square steel and the second split square steel, the first split square steel and the second split square steel are respectively connected to a stop dial wheel and a push dial wheel, the stop dial wheel and the push dial wheel are simultaneously formed with wheel hooks, a frame opening that cooperates with the wheel hook is formed on the cam pull frame, and the wheel hook can drive the lock tongue assembly to slide along the length direction of the lock body outer cover when the stop dial wheel or the push dial wheel rotates; the stop dial wheel and the push dial wheel are simultaneously formed with a bayonet that cooperates with the stop pin to lock.

[0009] Furthermore, a conical boss is formed on the end surface of the stop pin, and a conical groove is formed at the bayonet of the push dial, and the conical groove can cooperate with the boss.

[0010] Furthermore, a limiting protrusion is arranged on the stop dial wheel or the push dial wheel away from the wheel hook.

[0011] Furthermore, the first split square steel and the second split square steel are coaxially connected via a rotating shaft, and the first split square steel and the second split square steel can rotate independently.

[0012] Furthermore, the lock body outer cover includes a first cover body, a second cover body, and a hollow rivet detachably connected to the first cover body and the second cover body.

[0013] Furthermore, the lock body outer cover is connected to a lock body panel, and the lock body outer cover is connected to the door through the lock body panel.

[0014] A method for preventing accidental locking of a door, using a lock body structure as described in any of the above items, pressing a sliding pin block and displacing it inwards, at which time the stop pin cooperates with the handle assembly, and the handle assembly cannot be rotated to lock the door; when closing the door, the door acts on the lock tongue, and after the lock tongue drives the pull rod head to move, the pull rod head can act on the toggle pin, and the toggle pin drives the sliding pin block to move, so that the stop pin is disengaged from the handle assembly, thereby realizing the anti-reverse locking function, and at this time the handle assembly can be rotated, and the lock tongue can be retracted by the rotation of the handle assembly, thereby achieving the effect of unlocking the door.

[0015] The beneficial effects of the present invention are:

[0016] A lock body structure and method capable of preventing accidental anti - locking of a door. When the device is in use, when a person inside the room accidentally closes the door, the door acts on the lock tongue in a timely manner. After the lock tongue drives the displacement of the pull rod head, the pull rod head can act on the toggle pin, and the toggle pin drives the displacement of the sliding pin block, so that the stop pin is disengaged from the handle assembly, thereby realizing the function of preventing anti - locking. At this time, the handle assembly can be rotated, and the lock tongue can be retracted by the rotation of the handle assembly, thus achieving the effect of unlocking the door, solving the technical problems in the background art.

[0017] In the lock body structure disclosed by the present invention, the stop pin can be snapped into the handle assembly to stop the handle assembly. Through the built - in linkage mechanism, the stop pin can be popped out and disengaged from the handle assembly to realize the function of automatic anti - locking. The overall structure design is more compact and reasonable, and can be directly installed on the existing structure, saving costs.

[0018] In the lock body structure disclosed by the present invention, through the cooperation of the tapered hole and the toggle pin, under the guidance of the wedge - shaped surface, it can be used to realize the disengagement of the stop pin from the handle assembly. The tapered hole can also be used to accommodate the toggle pin and limit the toggle pin after movement, increasing the stability of the structure during use.

[0019] In the lock body structure disclosed by the present invention, the toggle pin is located on the side close to the lock tongue and will not interfere with the stop pin. The overall structure is reasonable, and through the cooperation of the existing lock tongue, the overall structure is greatly optimized, with reasonable structure and easy to mass - produce and manufacture.

[0020] Other advantages, objectives and features of the present invention will be described in the subsequent specification, and to some extent, they are obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0022] Figure 1 It is a schematic structural diagram of the lock body structure of the present invention;

[0023] Figure 2 It is an exploded view of the lock body structure of the present invention;

[0024] Figure 3 It is an internal schematic diagram of the lock body structure;

[0025] Figure 4 It is a schematic diagram of the cooperation between the bayonet and the stop pin;

[0026] Figure 5An exploded view of the stop assembly;

[0027] Figure 6 It is the structural schematic diagram of the tapered hole;

[0028] Figure 7 It is a schematic diagram of the structure of split square steel.

[0029] The markings in the accompanying drawings are as follows: lock body outer cover 1, handle assembly 2, lock tongue assembly 3, first elastic reset device 4, lock tongue 5, lock tongue pull rod 6, pull rod head 7, second elastic reset device 8, cam pull frame 9, stop assembly 10, stop pin seat 11, sliding pin block 12, stop pin 13, toggle pin 14, tapered hole 15, through hole 16, elastic support device 17, steel ball 18, first limiting hole 19, second limiting hole 20, locking push rod 21, first door handle 22, second door handle 23, first split square steel 24, second split square steel 25, stop dial wheel 26, push dial wheel 27, wheel hook 28, frame mouth 29, bayonet 30, boss 31, tapered groove 32, limiting protrusion 33, rotating shaft 34, first cover body 35, second cover body 36, hollow rivet 37, lock body panel 38. DETAILED DESCRIPTION

[0030] like Figures 1 to 7 As shown, the present invention discloses a lock body structure capable of preventing accidental locking of a door, comprising a lock body outer cover 1, a handle assembly 2 rotatably mounted on a side of the lock body outer cover 1, a lock tongue assembly 3 connected to the lock body outer cover 1, and a first elastic reset device 4 connecting the lock tongue assembly 3 and the lock body outer cover 1. The lock body outer cover 1 of the present invention is in the shape of a long column and can be directly inserted into the lock hole of the door. The handle assembly 2 rotates with the door and is used to control the opening and closing of the door after rotation. The first elastic reset device 4 is used to provide an outward elastic supporting force to the lock tongue assembly 3. After the lock tongue assembly 3 is aligned with the locking position, the door can be automatically locked.

[0031] In some other embodiments, the lock body outer cover 1 may also be cylindrical. In this case, it is set to a long column shape, mainly to facilitate its installation, and also to facilitate the connection and cooperation with the lock tongue assembly 3, and can limit the lock tongue assembly 3 in the circumferential direction.

[0032] The lock tongue assembly 3 includes a lock tongue 5, a lock tongue pull rod 6, a pull rod head 7, a second elastic reset device 8, and a cam pull frame 9. An arc-shaped inclined surface is provided on the lock tongue 5 to facilitate cooperation with the door, with the extension direction of the lock body outer cover 1 as the longitudinal direction, and the lock tongue pull rod 6 also extends along the longitudinal direction. The cam pull frame 9 is slidably installed in the lock body outer cover 1. One end of the lock tongue 5 is connected to the lock tongue pull rod 6, and the other end of the lock tongue pull rod 6 slidably extends into the cam pull frame 9 and is then connected to the pull rod head 7 to play a limiting role through the pull rod head 7. At this time, the lock tongue pull rod 6 can move inward, but under the limiting effect of the pull rod head 7, it can prevent the lock tongue 5 and the lock tongue pull rod 6 from slipping outwards.

[0033] A second elastic reset device 8 is connected between the lock tongue 5 and the cam pull frame 9; the second elastic reset device 8 uses a spring, and this spring is sleeved on the outside of the lock tongue pull rod 6 to provide an outward elastic supporting force for the lock tongue 5. The elastic force of the second elastic reset device 8 is less than the elastic force of the first elastic reset device 4 to avoid affecting the movement of the cam pull frame 9.

[0034] Among them, the lock body outer cover 1 is simultaneously connected with a stop assembly 10. The stop assembly 10 includes a stop pin seat 11 installed in the lock body outer cover 1, a sliding pin block 12 slidably installed in the stop pin seat 11, and a stop pin 13 provided on one side of the sliding pin block 12; the stop pin seat 11 is detachably connected to the lock body outer cover 1. The front and rear sides of the cam pull frame 9 penetrate through to avoid interference with the stop assembly 10. A toggle pin 14 is provided on the other side of the sliding pin block 12 away from the stop pin 13, and a wedge-shaped surface is formed on the surface of the toggle pin 14. The toggle pin 14 and the stop pin 13 are in the same plane. A tapered hole 15 that cooperates with the wedge-shaped surface is formed on the pull rod head 7. The toggle pin 14 is eccentrically arranged relative to the tapered hole 15 on the sliding pin block 12. The handle assembly 2 can drive the cam pull frame 9 to displace after rotation. The stop pin 13 is used to stop the handle assembly 2. When the lock tongue 5 drives the pull rod head 7 to displace, the pull rod head 7 can act on the toggle pin 14, and the toggle pin 14 drives the sliding pin block 12 to displace, so that the stop pin 13 is disengaged from the handle assembly 2. The device of the present invention can be used to realize the disengagement of the stop pin 13 and the handle assembly 2 through the cooperation of the tapered hole 15 and the toggle pin 14 under the guidance of the wedge-shaped surface. The tapered hole 15 can also be used to accommodate the toggle pin 14 and limit the toggle pin 14 after movement, increasing the stability of the structure during use.

[0035] In this embodiment, a through hole 16 is provided on the sliding pin block 12, and an elastic support device 17 is installed in the through hole 16. Steel balls 18 are connected to both ends of the elastic support device 17 and extend out from the opening of the through hole 16. A first limiting hole 19 and a second limiting hole 20 that cooperate with the steel ball 18 are provided on the stop pin seat 11. When the steel ball 18 cooperates with the first limiting hole 19 on the inner side, the state is a locked state, and the handle assembly 2 and the stop pin 13 cannot rotate. When the steel ball 18 cooperates with the second limiting hole 20 on the outer side, the stop pin 13 and the handle assembly 2 are staggered to prevent reverse locking. By setting the above structure, it is convenient to limit the sliding pin block 12 at the extreme positions of the two moving strokes, so that the operation of the device is more stable.

[0036] In this embodiment, the stop pin seat 11 is also connected to a locking push rod 21, and the locking push rod 21 extends from the lock body outer cover 1. By providing the locking push rod 21, the movement of the stop pin seat 11 can be easily controlled, which is more convenient to use.

[0037] In this embodiment, the handle assembly 2 includes a first door handle 22 and a second door handle 23 which are rotatably connected on both sides of the lock body cover 1. The first door handle 22 is located on the inner side of the room. The first door handle 22 and the second door handle 23 are respectively connected to a first split square steel 24 and a second split square steel 25. A stop dial 26 and a push dial 27 are respectively connected to the first split square steel 24 and the second split square steel 25. A wheel hook 28 is formed on the stop dial 26 and the push dial 27 at the same time. A frame opening 29 which cooperates with the wheel hook 28 is formed on the cam pull frame 9. The wheel hook 28 extends from the frame opening 29. When the split square steel rotates clockwise, the wheel hook 28 can drive the lock tongue assembly 3 to slide along the length direction of the lock body cover 1 when the stop dial 26 or the push dial 27 rotates; a bayonet 30 which cooperates with the stop pin 13 for locking is formed on the stop dial 26 and the push dial 27 at the same time. The width of the stop pin 13 is adapted to the width of the bayonet 30. When the stop pin 13 is matched with the bayonet 30, the rotation of the stop dial 26 and the push dial 27 can be restricted, thereby achieving a locking effect. The stop dial 26 and the push dial 27 are both flat wheels, and the stop pin 13 can move along the direction of the stop dial 26 and the push dial 27 to achieve engagement or disengagement.

[0038] In this embodiment, a conical boss 31 is formed on the end surface of the stop pin 13, and a conical groove 32 is formed at the bayonet 30 of the push wheel 27, and the conical groove 32 can cooperate with the boss 31. By providing the conical groove 32, in the initial stage of cooperation between the conical groove 32 and the boss 31, as the stop pin 13 is continuously displaced and cooperates with the conical groove 32, the circumferential position of the stop pin 13 can be continuously adjusted through the cooperation of the inclined surfaces to make it adapt to the bayonet 30, which can reduce the occurrence of interference and the like, and make the cooperation between the boss 31 and the conical groove 32 smoother.

[0039] In this embodiment, a limiting protrusion 33 is provided on the stop dial wheel 26 or the push dial wheel 27 away from the wheel hook 28, and the limiting protrusion 33 cooperates with the lock body outer cover 1 to prevent the dial wheel from excessive deflection. The first split square steel 24 and the second split square steel 25 are coaxially connected through the rotating shaft 34, and the first split square steel 24 and the second split square steel 25 can rotate independently, so that the two door handles can be rotated independently.

[0040] In this embodiment, the lock body outer cover 1 includes a first cover body 35, a second cover body 36, and a hollow rivet 37 detachably connected to the first cover body 35 and the second cover body 36. By providing a detachable lock body outer cover 1, the internal structure can be easily disassembled and maintained.

[0041] In this embodiment, the lock body outer cover 1 is connected to the lock body panel 38, and the lock body outer cover 1 is connected to the door through the lock body panel 38, which facilitates the installation and use of the entire device.

[0042] A method for preventing accidental locking of a door, using a lock body structure as described above. When in use, the sliding pin block 12 is pressed and displaced inwardly. At this time, the stop pin 13 cooperates with the handle assembly 2, and the handle assembly 2 cannot rotate to achieve locking of the door; when closing the door, the door acts on the lock tongue 5, and after the lock tongue 5 drives the pull rod head 7 to move, the pull rod head 7 can act on the toggle pin 14, and the toggle pin 14 drives the sliding pin block 12 to move, so that the stop pin 13 is disengaged from the handle assembly 2, thereby achieving the function of preventing reverse locking. At this time, the handle assembly 2 can be rotated, and the lock tongue 5 can be retracted by the rotation of the handle assembly 2, thereby achieving the effect of unlocking the door.

[0043] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A lock body structure capable of preventing accidental locking of a door, characterized in that: The lock body comprises a lock body cover, a handle assembly rotatably mounted on the side of the lock body cover, a lock tongue assembly connected with the lock body cover, a first elastic reset device connecting the lock tongue assembly and the lock body cover, the lock tongue assembly comprises a lock tongue, a lock tongue pull rod, a pull rod head, a second elastic reset device and a cam pull frame, the cam pull frame is slidably mounted in the lock body cover, the lock tongue is connected to one end of the lock tongue pull rod, the other end of the lock tongue pull rod is slidably extended into the cam pull frame and then connected to the pull rod head, and a second elastic reset device is connected between the lock tongue and the cam pull frame; the lock body cover is also connected to a stop assembly, the stop assembly comprises a stop pin seat mounted in the lock body cover, a sliding pin block slidably mounted in the stop pin seat, and a stop pin arranged on one side of the sliding pin block; A toggle pin is arranged on the other side of the sliding pin block away from the stop pin, a wedge-shaped surface is formed on the surface of the toggle pin, a tapered hole matching the wedge-shaped surface is formed on the pull rod head, the toggle pin is eccentrically arranged on the sliding pin block relative to the tapered hole, the handle assembly can drive the cam pull frame to move after rotation, the stop pin is used to stop the handle assembly, when the lock tongue drives the pull rod head to move, the pull rod head can act on the toggle pin, and the toggle pin drives the sliding pin block to move, so that the stop pin is disengaged from the handle assembly.

2. A lock body structure capable of preventing accidental locking of a door according to claim 1, characterized in that: A through hole is provided on the sliding pin block, an elastic support device is installed in the through hole, steel balls are connected to both ends of the elastic support device and extend out from the orifice of the through hole, and a first limiting hole and a second limiting hole cooperating with the steel balls are provided on the stop pin seat.

3. A lock structure capable of preventing accidental locking of a door according to claim 2, characterized in that: The stop pin seat is also connected with a locking push rod, and the locking push rod extends from the lock body outer cover.

4. A lock structure capable of preventing accidental locking of a door according to any one of claims 1 to 3, characterized in that: The handle assembly includes a first door handle and a second door handle which are rotatably connected on both sides of the lock body cover respectively, the first door handle and the second door handle are respectively connected to a first split square steel and a second split square steel, a stop dial wheel and a push dial wheel are respectively connected to the first split square steel and the second split square steel, wheel hooks are formed on the stop dial wheel and the push dial wheel at the same time, a frame opening which cooperates with the wheel hook is formed on the cam pull frame, and the wheel hook can drive the lock tongue assembly to slide along the length direction of the lock body cover when the stop dial wheel or the push dial wheel rotates; a bayonet which cooperates with the stop pin to lock is formed on the stop dial wheel and the push dial wheel at the same time.

5. A lock structure capable of preventing accidental locking of a door according to claim 4, characterized in that: A conical boss is formed on the end surface of the stop pin, and a conical groove is formed at the bayonet of the push dial, and the conical groove can cooperate with the boss.

6. A lock structure capable of preventing accidental locking of a door according to claim 4, characterized in that: A limit protrusion is arranged on the stop dial wheel or the push dial wheel away from the wheel hook.

7. A lock structure capable of preventing accidental locking of a door according to claim 4, characterized in that: The first split square steel and the second split square steel are coaxially connected via a rotating shaft, and the first split square steel and the second split square steel can rotate independently.

8. The lock structure capable of preventing accidental locking of a door according to claim 1, characterized in that: The lock body outer cover comprises a first cover body, a second cover body, and a hollow rivet detachably connected to the first cover body and the second cover body.

9. A lock structure capable of preventing accidental locking of a door according to claim 8, characterized in that: The lock body outer cover is connected with a lock body panel, and the lock body outer cover is connected to the door through the lock body panel.

10. A method for preventing accidental locking of a door, characterized in that: By adopting the lock body structure as described in any one of claims 1 to 9, the sliding pin block is pressed and displaced inwardly, at which time the stop pin cooperates with the handle assembly, and the handle assembly cannot be rotated to achieve locking of the door; when closing the door, the door acts on the lock tongue, and after the lock tongue drives the pull rod head to move, the pull rod head can act on the toggle pin, and the toggle pin drives the sliding pin block to move, so that the stop pin is disengaged from the handle assembly, thereby achieving the function of anti-reverse locking, and the handle assembly can be rotated at this time, and the lock tongue can be retracted by the rotation of the handle assembly, thereby achieving the effect of unlocking the door.

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