A lock

Abstract

The present invention discloses a lock, comprising a front lock body, a rear lock body and a square shaft, wherein the rear lock body comprises a rear panel, a rear handle, a rear positioning block and a rear limit plate, the end of the rear handle passes through the rear panel and is engaged with the rear positioning block, the square shaft is provided with an idle portion, an engaging portion and a transmission pin, the square shaft passes through the rear positioning block and the rear limit plate and extends into the rear handle, the rear positioning block is provided with a pushing V-shaped groove, the transmission pin is arranged in the pushing V-shaped groove, the rear handle is provided with a rotating slot, the rotating slot is provided with a limit slot, one end of the square shaft is arranged in the rotating slot, and the angular position of the square shaft is arranged in the limit slot. Rotating the rear handle causes the transmission pin to move along the pushing V-shaped groove slope, which can first drive the movement of the square shaft to release the anti-lock, and continuing to rotate the rear handle to drive the square shaft to rotate can unlock the lock, thereby having a simple structure and convenient operation.

Description

Technical Field

[0001] The present invention relates to the field of locks, and in particular to a lock with an anti-locking device having simple opening operation and strong escape performance. Background Art

[0002] The existing locks are all equipped with anti-lock devices. When people outside the door do not want to unlock and enter, the anti-lock device can be activated to prevent others from unlocking and entering. However, after the existing anti-lock device is activated, the anti-lock device must be manually released before unlocking. In an emergency, manually releasing the anti-lock device before unlocking will waste time for escape. Or after the elderly and children have opened the anti-lock device indoors, it is extremely inconvenient to release the anti-lock device. In addition, the anti-lock device is easily damaged after long-term use, making it impossible to open the lock indoors. Therefore, the anti-lock device of the existing lock is inconvenient and time-consuming to open, resulting in poor escape safety in an emergency. Summary of the Invention

[0003] The invention solves the problem of poor safety of the anti-locking device of the existing lock, which is inconvenient to open and escape.

[0004] The technical solution adopted by the present invention is a lock, including a front lock body, a rear lock body and a square shaft, the rear lock body includes a rear panel, a rear handle, a rear positioning block and a rear limit plate, the end of the rear handle passes through the rear panel and is engaged with the rear positioning block, the square shaft is provided with an idle part, an engaging part and a transmission pin, the square shaft extends into the rear handle after passing through the rear positioning block and the rear limit plate, the rear positioning block is provided with a pushing V-shaped groove, the transmission pin is provided in the pushing V-shaped groove, the rear handle is provided with a rotating slot, the rotating slot is provided with a limit slot, one end of the square shaft is provided in the rotating slot, and the angular position of the square shaft is provided in the limit slot.

[0005] The beneficial effects of the present invention compared with the prior art are as follows: rotating the rear handle causes the transmission pin to move along the V-groove slope, which can first drive the movement of the square shaft and then continue to rotate the rear handle to drive the square shaft to rotate to open the lock. The structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0007] Figure 2 This is an exploded view of the rear lock body of the present invention;

[0008] Figure 3 This is a schematic diagram of the engagement connection structure between the rear handle and the rear positioning block of the present invention;

[0009] Figure 4 This is a schematic diagram of the structure in which the transmission pin of the square shaft of the present invention is arranged in the pushing V-shaped groove of the rear positioning block;

[0010] Figure 5 This is a schematic structural diagram of the square shaft of the present invention being arranged in the rotation slot of the rear handle;

[0011] Figure 6 This is a schematic diagram of the abutment structure between the square shaft and the limiting groove when the rear handle is rotated according to the present invention;

[0012] Figure 7 This is a structural diagram of the present invention in which the rear positioning block pushes the transmission pin along the V-shaped groove and the idle rotation of the square shaft falls on the rear limit plate;

[0013] Figure 8 It is a schematic diagram of the square shaft structure of the present invention;

[0014] Figure 9 This is a schematic diagram of the exploded structure of the front lock body of the present invention;

[0015] Figure 10 This is an assembly diagram of a first embodiment of the anti-locking device of the present invention;

[0016] Figure 11 This is an exploded view of a first embodiment of the anti-locking device of the present invention;

[0017] Figure 12 This is an assembly diagram of a second embodiment of the anti-locking device of the present invention;

[0018] Figure 13 This is an exploded view of the second embodiment of the anti-locking device of the present invention.

[0019] Figure numerals: front lock body 10; rear lock body 20; square shaft 30; rear panel 21; rear handle 22; rear positioning block 23; rear limit plate 24; idling portion 31; engaging portion 33; transmission pin 32; pushing V-shaped groove 25; rotating slot 201; limit slot 202; front panel 11; front positioning block 12; front handle 13; transmission shaft 14; rear connecting rod 26; pushing block 27; anti-locking pin 28. DETAILED DESCRIPTION

[0020] like Figures 1 to 8 The present invention relates to a lock device, comprising a front lock body 10, a rear lock body 20 and a square shaft 30. The rear lock body 20 comprises a rear panel 21, a rear handle 22, a rear positioning block 23 and a rear limit plate 24. The end of the rear handle 22 passes through the rear panel 21 and is engaged with the rear positioning block 23. The square shaft 30 is provided with an idle portion 31, an engaging portion 33 and a transmission pin 32. The square shaft 30 passes through the rear positioning block 23 and the rear limit plate 24 and then extends into the rear handle 22. A pushing V-shaped groove 25 is provided in the rear positioning block 23, and the transmission pin 32 is arranged in the pushing V-shaped groove 25.

[0021] A rotation slot 201 is provided at the end of the rear handle 22, and the rotation slot 201 is provided with four limiting slots 202. One end of the square shaft 30 is provided in the rotation slot 201, and the four corners of the square shaft 30 are provided in the limiting slots 202, so that there is space for movement between the four corners of the square shaft 30 and the four limiting slots 202 of the rear handle 22.

[0022] like Figures 4 to 8 The locking mechanism 33 of the front lock body 10 is locked when the front lock body 10 is unlocked, and the locking mechanism 33 of the front lock body 10 is locked when the front lock body 10 is unlocked.

[0023] The invention solves the problem that after the anti-locking device of the existing lock is opened, the anti-locking device needs to be opened first before the rear handle can be rotated to unlock the lock, which makes the unlocking operation inconvenient in an emergency, wastes escape time, or the lock cannot be opened due to a malfunction of the anti-locking device. In particular, it is inconvenient for the elderly or children to open the anti-locking device indoors when using the lock. The unlocking structure of the present application rotates the rear handle 22 to first drive the movement of the square shaft 30 and then drive the rotation of the square shaft 30 to unlock the lock. The structure is simple and easy to operate.

[0024] like Figure 9 As shown, the front lock body 10 includes a front panel 11, a front positioning block 12 and a front handle 13. One end of the front handle 13 extends into the front panel 11 and is engaged with the front positioning block 12. The other end of the square shaft 30 is arranged in the front handle 13. A transmission shaft 14 is provided in the front handle 13. One end of the transmission shaft 14 is connected to the end of the square shaft 30, and the other end of the transmission shaft 14 is arranged in the side wall of the front handle 13.

[0025] When the lock is in the reverse locked state, if the personnel inside the room cannot open the lock, the transmission shaft 14 in the front handle 13 can be pushed by a tool outside to drive the square shaft 30 to move, so that the engaging portion 33 of the square shaft 30 leaves the rear limit plate 24 and the idle portion 31 falls into the rear limit plate 24. At this time, rotating the front handle 13 can unlock the lock, preventing the personnel inside the room from being unable to open the lock accidentally.

[0026] like Figure 10-11The first embodiment of the anti-locking device is disclosed. The anti-locking device is arranged in the rear handle 22. The anti-locking device includes a rear connecting rod 26 and a push block 27. One end of the push block 27 is connected to the rear connecting rod 26, and the other end of the push block 27 is connected to the square shaft 30. The rear connecting rod 26 extends to the outside of the rear handle 22. When in use, the rear connecting rod 26 in the rear handle 22 is pushed through the push block 27 to push the square shaft 30 to move, so that the engaging portion 33 of the square shaft 30 is arranged in the rear limit block 24 to complete the anti-locking.

[0027] like Figure 12-13 A second embodiment of the anti-locking device is disclosed, which includes a push block 27 and an anti-locking pin 28. A movable groove 221 is provided in the rear handle 22. One end of the anti-locking pin 28 is connected to the push block 27, and the other end of the anti-locking pin 28 is provided in the movable groove 221 and protrudes from the surface of the rear handle 22. When in use, the anti-locking pin 28 on the surface of the rear handle 22 is pushed to move in the movable groove, which can drive the engaging portion of the square shaft 30 to engage in the rear limit block 24 to complete the anti-locking.

Claims

1. A lock, characterized in that: The invention comprises a front lock body (10), a rear lock body (20) and a square shaft (30); the rear lock body (20) comprises a rear panel (21), a rear handle (22), a rear positioning block (23) and a rear limit plate (24); the end of the rear handle (22) passes through the rear panel (21) and is engaged with the rear positioning block (23); the square shaft (30) is provided with an idle portion (31), an engaging portion (33) and a transmission pin (32); the square shaft (30) passes through the rear positioning block (23) and the rear limit plate (24) and then extends into the rear handle (22); the rear positioning block (23) is provided with a pushing V-shaped groove (25); the transmission pin (32) is arranged in the pushing V-shaped groove (25); the rear handle (22) is provided with a rotating portion (31), an engaging portion (33) and a transmission pin (32); The movable card slot (201) is provided with a limit slot (202), one end of the square shaft (30) is provided in the rotating card slot (201), the angular position of the square shaft (30) is provided in the limit slot (202), and also includes an anti-locking device, the engaging portion (33) of the square shaft (30) is provided in the rear limit plate (24) and is locked, the rear handle (22) can first drive the rear positioning block (23) to rotate, the rear positioning block (23) pushes the transmission pin (32) along the slope of the pushing V-shaped groove (25) and drives the square shaft (30) to move, the engaging portion (33) of the square shaft (30) leaves the rear limit plate (24) and the idling portion (31) falls into the rear limit plate (24).

2. The lock according to claim 1, characterized in that: The front lock body (10) comprises a front panel (11), a front positioning block (12) and a front handle (13). One end of the front handle (13) extends into the front panel (11) and is engaged with the front positioning block (12). The other end of the square shaft (30) is disposed in the front handle (13).

3. The lock according to claim 2, characterized in that: A transmission shaft (14) is provided in the front handle (13), one end of the transmission shaft (14) is connected to the end of the square shaft (30), and the other end of the transmission shaft (14) is provided in the side wall of the front handle (13).

4. The lock according to claim 1, characterized in that: The anti-locking device is arranged in the rear handle (22).

5. The lock according to claim 4, characterized in that: The anti-locking device comprises a rear connecting rod (26) and a push block (27), one end of the push block (27) is connected to the rear connecting rod (26), and the other end of the push block (27) is connected to the square shaft (30), and the rear connecting rod (26) extends to the outside of the rear handle (22).

6. The lock according to claim 4, characterized in that: The anti-locking device comprises a push block (27) and an anti-locking pin (28); a movable groove (221) is provided in the rear handle (22); one end of the anti-locking pin (28) is connected to the push block (27); and the other end of the anti-locking pin (28) is provided in the movable groove (221) and protrudes from the surface of the rear handle (22).

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