A door lock release handle device

Abstract

This invention discloses a door lock unlocking handle device, including a lock box, a handle mounted on the lock box, and a lock cylinder. A lock cylinder is installed inside the lock cylinder, and a cam is coaxially mounted on the lock cylinder, rotating synchronously with the lock cylinder. A pressure rod assembly is also provided below the cam inside the lock box. The pressure rod assembly includes an outer frame fixed inside the lock box and a pressure rod installed within the outer frame, which slides up and down within the outer frame. A fork and an unlocking disc are provided below the pressure rod assembly. A second torsion spring is mounted on the fork, one end of which is fixed inside the lock box, and the other end is connected to the fork. The unlocking disc is connected to the handle via a spindle. The two ends of the fork form a lever structure. In the locked state, one end of the fork abuts against the pressure rod, and the other end abuts against the unlocking disc at a dead point, preventing the handle from rotating. During unlocking, the cam rotates with the lock cylinder and presses down the pressure rod, which releases the dead point from the fork, allowing the unlocking disc to resume movement, and the handle can then be rotated to unlock.

Description

Technical Field

[0001] This invention relates to the field of urban rail transit technology, and in particular to a door lock unlocking handle device. Background Technology

[0002] In rail transit platform screen door systems, unlocking handles with authorization functions are installed on the platform side of the platform end doors. In special circumstances, these handles can be unlocked via a mechanical key or external signal, allowing the platform end door to be opened, thus ensuring the safe operation of rail vehicles. Therefore, the reliability of the unlocking handles is crucial. Existing unlocking handles mostly use gear-driven unlocking, which requires high precision in gear meshing and is prone to failure. Furthermore, existing unlocking handles lack an automatic reset function, requiring manual reset of the lock cylinder by the operator. If the operator forgets to reset, the handle remains in the unlockable state, seriously impacting vehicle operational safety. Summary of the Invention

[0003] Purpose of the invention: In view of the shortcomings of existing unlocking handles which require high precision and lack automatic reset function, the present invention provides a door lock unlocking handle device with simple structure and automatic reset function.

[0004] Technical Solution: To solve the above problems, the present invention employs a door lock unlocking handle device, including a lock box, a handle mounted on the lock box, and a lock cylinder. A lock cylinder is installed inside the lock cylinder, and a cam is coaxially sleeved on the lock cylinder, rotating synchronously with the lock cylinder. A pressure rod assembly located below the cam is also provided inside the lock box. The pressure rod assembly includes an outer frame fixed inside the lock box and a pressure rod installed inside the outer frame, the pressure rod sliding up and down within the outer frame. A fork and an unlocking disc are provided below the pressure rod assembly. A second torsion spring is provided on the fork, one end of which is fixed inside the lock box, and the other end is connected to the fork. The unlocking disc is connected to the handle via a spindle.

[0005] The two ends of the shift fork form a lever structure. In the locked state, one end of the shift fork abuts against the pressure rod, and the other end of the shift fork abuts against the unlocking disc, with the contact point being a dead point, so the handle cannot be turned. When unlocking, the cam rotates with the lock cylinder and presses down the pressure rod. The pressure rod presses down the shift fork to release the dead point, allowing the unlocking disc to resume movement. The handle is then turned to unlock. The second torsion spring is used to reset the shift fork to the locked state.

[0006] Furthermore, it also includes a first reset assembly located inside the lock box. The first reset assembly includes a first push rod and a first compression spring sleeved on the first push rod. The first push rod is provided with a first limiting block. One end of the first compression spring is connected to the first limiting block, and the other end is fixed inside the lock box. When unlocking, the cam presses down on the first push rod, and the first compression spring is in a compressed state. After unlocking is completed, the first compression spring causes the first push rod to slide up and rotate the cam to reset.

[0007] Furthermore, it also includes a second reset assembly, which includes a second push rod and a second compression spring. One end of the second compression spring is connected to the second push rod, and the other end is fixed inside the lock box. The unlocking disc is provided with a first protrusion. When unlocking, the unlocking disc rotates, the first protrusion presses down on the second push rod, and the second compression spring is in a compressed state. After unlocking is completed, the second compression spring causes the second push rod to slide up and move the first protrusion to rotate and reset the unlocking disc.

[0008] Furthermore, the unlocking disc is provided with a second protrusion, and the lock box is provided with a second limiting block. In the locked state, the second protrusion and the second limiting block are in contact with each other, and in the unlocking state, the second protrusion and the second limiting block move away from each other.

[0009] Furthermore, the unlocking disc is also provided with a third protrusion. In the locked state, the third protrusion abuts against the fork and the contact point is a dead point.

[0010] Furthermore, the unlocking disc is also equipped with a pawl, and one end of the first push rod is equipped with a first deflector. When unlocking, the pawl hooks onto the first deflector, causing the first push rod to slide down. The first compression spring is in a compressed state. After unlocking is completed, the pawl releases the first deflector, and the first compression spring causes the first push rod to slide up and rotate the cam to reset.

[0011] Furthermore, the lock head also includes a base located inside the lock box, the lock cylinder is installed inside the base, and a first torsion spring is also sleeved on the lock cylinder. After unlocking, the first torsion spring drives the lock cylinder to reset.

[0012] Furthermore, the outer frame is an electromagnet, and the pressure rod is an iron core. When energized, the lower end of the pressure rod extends out to press the lower fork, and when de-energized, the lower end of the pressure rod retracts.

[0013] Furthermore, the lock box is provided with a first mounting groove for installing the first reset component, and one end of the first compression spring is fixed in the first mounting groove.

[0014] Furthermore, the lock box is provided with a second mounting groove for installing the second reset assembly, and one end of the second compression spring is fixed in the second mounting groove.

[0015] Beneficial effects: Compared with the prior art, the significant advantages of this invention are (1) the dead point limiting structure between the fork and the unlocking disc ensures the reliability of the handle when locked, the internal transmission structure of the handle is simpler and the precision requirement is lower, reducing the probability of handle structure failure; (2) the torsion spring and reset component help the handle, lock cylinder and other components to automatically reset after unlocking, preventing the operator from forgetting to manually reset and affecting operational safety, further improving the safety of the handle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the handle device of the present invention;

[0017] Figure 2 This is a schematic diagram of the internal structure of the handle device of the present invention;

[0018] Figure 3 This is an exploded view of the internal structure of the handle device of the present invention;

[0019] Figure 4 This is a schematic diagram of the internal transmission process when the handle device of the present invention is unlocked by a mechanical key;

[0020] Figure 5 This is a schematic diagram of the internal transmission process when the handle device of the present invention is unlocked by an external signal. Detailed Implementation

[0021] like Figures 1 to 3 As shown, a door lock unlocking handle device in this embodiment includes a lock box 1, a handle 2, and a lock cylinder 3. The handle 2 is mounted on the lock box 1, and the lock box 1 has a keyhole that matches the lock cylinder 3. The lock cylinder 3 includes a base 31 and a lock cylinder 32. The lock cylinder 32 is mounted inside the base 31, and a first torsion spring 33 is sleeved on the lock cylinder 32, located between the base 31 and the lock cylinder 32. The lock cylinder 32 uses a special lock cylinder for track doors, which can be unlocked using a universal key for track doors, making it more convenient. The lock box 1 has a cam 4 coaxially sleeved on the lock cylinder 32, and the cam 4 can rotate synchronously with the lock cylinder 32. Below the cam 4 is a pressure rod assembly 6, which includes an outer frame 62 fixed inside the lock box 1 and a pressure rod 61 installed inside the outer frame 62. The outer frame 62 is an electromagnet, and the pressure rod 61 is an iron core. A sliding groove is provided in the middle of the outer frame 62, and the pressure rod 61 can slide up and down in the sliding groove.

[0022] The lock box 1 has a first mounting groove 11 located on one side of the pressure rod assembly 6, and a first reset assembly 5 is installed in the first mounting groove 11. The first reset assembly 5 includes a first push rod 53 and a first compression spring 51 sleeved on the first push rod 53. A first limiting block 531 is provided on the first push rod 53. The first mounting groove 11 has openings at both the top and bottom for the first push rod 53 to extend out, and a slot for fixing the first compression spring 51 is provided at the lower opening. One end of the first compression spring 51 is connected to the first limiting block 531, and the other end is fixed in the slot. A first lever 532 is provided at the lower end of the first push rod 53, and a second lever 533 is provided at the upper end. The second lever 533 is used to move the cam 4, and the first lever 532 is used to cooperate with the unlocking disc 8. A first pressure plate 52 covers the first mounting groove 11 to fix the first reset assembly 5 in the first mounting groove 11.

[0023] The lock box 1 also has a second mounting groove 12 located on one side of the unlocking disc 8. The lower end of the second mounting groove 12 is closed, and the upper end is open. A second reset assembly 9 for resetting the handle 2 is installed in the second mounting groove 12. The second reset assembly 9 includes a second push rod 93 and a second compression spring 91. One end of the second compression spring 91 is connected to the second push rod 93, and the other end is fixed to the bottom of the second mounting groove 12. A guide rod is provided below the second push rod 93, and the second compression spring 91 is sleeved on the guide rod to make the movement of the second compression spring 91 more stable. A second pressure plate 92 covers the second mounting groove 12 to fix the second reset assembly 9 in the second mounting groove 12.

[0024] Below the lever assembly 6 are a fork 7 and an unlocking disc 8. The unlocking disc 8 is connected to the handle 2 via a spindle 10, and the handle 2 rotates synchronously with the unlocking disc 8. The two ends of the fork form a lever structure. A second torsion spring 71 is provided on the fork 7, one end of which is fixed inside the lock box 1, and the other end is connected to the fork 7. The unlocking disc 8 has a first protrusion 81, a second protrusion 82, a third protrusion 83, and a hook 84 arranged clockwise. In the locked state, the first protrusion 81 abuts against the second push rod 93 and, under the action of the second pressure spring 91, keeps the handle 2 in a horizontal position. A second limiting block 13 is provided inside the lock box 1. The second protrusion 82 abuts against the second limiting block 13, ensuring that the handle 2 remains in a horizontal position after locking and resetting, preventing further upward pulling. When unlocking, the second protrusion 82 and the second limiting block 13 move away from each other. The third protrusion 83 abuts against the fork 7 in the locked state, and the contact point is a dead point, preventing the handle 2 from rotating to unlock. The hook 84 works in conjunction with the first lever 532. In the locked state, the hook 84 and the first lever 532 are far apart and do not contact each other. During unlocking, the hook 84 rotates with the unlocking disc 8 and hooks the first lever 532, causing the first push rod 53 to slide down and the first compression spring 51 to be in a compressed state. The hook 84 pulls down the first push rod 53 so that the first push rod 53 and the cam 4 are far apart and do not contact each other, which helps the cam 4 to reset with the lock cylinder 32 and ensures that the cam 4 will not contact the first push rod 53 and get stuck. After unlocking, the hook 84 releases the first lever 532, and the first compression spring 51 causes the first push rod 53 to slide up. If the cam 4 has not fully reset with the lock cylinder 32 at this time, the second lever 533 can move the cam 4 to rotate and reset it, further ensuring that the cam 4 is fully reset.

[0025] In the locked state of the handle of this invention, the lower end of the pressure rod 61 is not extended, one end of the shift fork 7 abuts against the pressure rod 61, and the other end of the shift fork 7 abuts against the third protrusion 83 with the contact point being a dead point, so the handle 2 cannot be rotated. The handle 2 has two unlocking methods: mechanical key and external signal, such as... Figure 4As shown, when unlocking with a mechanical key, insert the key into the keyhole and turn it in the unlocking direction. The lock cylinder 32 drives the cam 4 to rotate synchronously. The protruding part of the cam 4 presses down on the pressure rod 61, causing its lower end to extend and press down on the shift fork 7. The end of the shift fork 7 that contacts the third protrusion 83 lifts up, releasing the dead point. The unlocking disc 8 and the handle 2 can then rotate. At this time, pressing down on the handle 2 unlocks the lock. Figure 5 As shown, when unlocking using an external signal, the power supply to the lever assembly 6 can be controlled via card swiping or remote signal. When powered on, the lower end of the lever 61 extends the lower fork 7, and then the handle is rotated to unlock. When powered off, the lower end of the lever 61 retracts. After unlocking, the first torsion spring 33 drives the lock cylinder 32 and cam 4 to reset, and the first reset assembly 5 further assists the cam 4 in resetting. The fork 7 resets under the action of the second torsion spring 71, and the second reset assembly 9 resets the handle 2. The fork 7 and the third protrusion 83 resume their abutment, and the handle cannot be rotated, thus achieving automatic reset and locking of the handle.

[0026] This invention ensures the reliability of the handle when locked by using a dead-point limiting structure between the shift fork and the unlocking disc. The internal transmission structure of the handle is simpler and requires lower precision, reducing the probability of handle structure failure. The torsion spring and reset assembly help the handle, lock cylinder and other components to automatically reset after unlocking, preventing operational safety from being affected by the operator forgetting to manually reset, and further improving the safety of the handle.

Claims

1. A door lock unlocking handle device, comprising a lock box (1), a handle (2) disposed on the lock box (1), and a lock cylinder (3), wherein a lock cylinder (32) is installed inside the lock cylinder (3), characterized in that, A cam (4) is coaxially sleeved on the lock cylinder (32), and the cam (4) rotates synchronously with the lock cylinder (32); a pressure rod assembly (6) located below the cam (4) is also provided in the lock box (1). The pressure rod assembly (6) includes an outer frame (62) fixed in the lock box (1) and a pressure rod (61) installed in the outer frame (62). The pressure rod (61) slides up and down in the outer frame (62); a fork (7) and an unlocking disc (8) are provided below the pressure rod assembly (6). A second torsion spring (71) is provided on the fork (7). One end of the second torsion spring (71) is fixed in the lock box (1), and the other end is connected to the fork (7); the unlocking disc (8) is connected to the handle (2) through a spindle (10); The two ends of the fork (7) form a lever structure. In the locked state, one end of the fork (7) abuts against the pressure rod (61), and the other end of the fork (7) abuts against the unlocking disc (8) and the contact point is a dead point, so the handle (2) cannot be rotated. When unlocking, the cam (4) rotates with the lock cylinder (32) and presses down the pressure rod (61). The pressure rod (61) presses down the fork (7) to release the dead point, so that the unlocking disc (8) resumes movement. The handle (2) is rotated to unlock. The second torsion spring (71) is used to reset the fork (7) to the locked state.

2. The door lock unlocking handle device as described in claim 1, characterized in that, It also includes a first reset assembly (5) located inside the lock box (1). The first reset assembly (5) includes a first push rod (53) and a first compression spring (51) sleeved on the first push rod (53). The first push rod (53) is provided with a first limiting block (531). One end of the first compression spring (51) is connected to the first limiting block (531), and the other end is fixed inside the lock box (1). When unlocking, the cam (4) presses down on the first push rod (53), and the first compression spring (51) is in a compressed state. After unlocking, the first compression spring (51) causes the first push rod (53) to slide up and push the cam (4) to rotate and reset.

3. The door lock unlocking handle device as described in claim 2, characterized in that, It also includes a second reset assembly (9), which includes a second push rod (93) and a second compression spring (91). One end of the second compression spring (91) is connected to the second push rod (93), and the other end is fixed inside the lock box (1). The unlocking disc (8) is provided with a first protrusion (81). When unlocking, the unlocking disc (8) rotates, the first protrusion (81) presses down on the second push rod (93), and the second compression spring (91) is in a compressed state. After unlocking, the second compression spring (91) causes the second push rod (93) to slide up and move the first protrusion (81) to make the unlocking disc (8) rotate and reset.

4. The door lock unlocking handle device as described in claim 3, characterized in that, The unlocking disc (8) is also provided with a second protrusion (82), and the lock box (1) is provided with a second limiting block (13). In the locked state, the second protrusion (82) and the second limiting block (13) abut against each other. When unlocking, the second protrusion (82) and the second limiting block (13) move away from each other.

5. The door lock unlocking handle device as described in claim 4, characterized in that, The unlocking disc (8) is also provided with a third protrusion (83). In the locked state, the third protrusion (83) abuts against the fork (7) and the contact point is a dead point.

6. The door lock unlocking handle device as described in claim 5, characterized in that, The unlocking disc (8) is also provided with a pawl (84), and one end of the first push rod (53) is provided with a first deflector (532). When unlocking, the pawl (84) hooks the first deflector (532) to make the first push rod (53) slide down, and the first compression spring (51) is in a compressed state. After unlocking is completed, the pawl (84) releases the first deflector (532), and the first compression spring (51) acts to make the first push rod (53) slide up and push the cam (4) to rotate and reset.

7. The door lock unlocking handle device as described in claim 6, characterized in that, The lock head (3) also includes a base (31) located inside the lock box (1), the lock cylinder (32) is installed inside the base (31), and a first torsion spring (33) is also sleeved on the lock cylinder (32). After unlocking, the first torsion spring (33) drives the lock cylinder (32) to reset.

8. The door lock unlocking handle device as described in claim 1, characterized in that, The outer frame (62) is an electromagnet, and the pressure rod (61) is an iron core. When energized, the lower end of the pressure rod (61) extends out to the lower pressure fork (7). When de-energized, the lower end of the pressure rod (61) retracts.

9. The door lock unlocking handle device as described in claim 2, characterized in that, The lock box (1) is provided with a first mounting groove (11) for installing the first reset assembly (5), and one end of the first compression spring (51) is fixed in the first mounting groove (11).

10. The door lock unlocking handle device as described in claim 3, characterized in that, The lock box (1) is provided with a second mounting groove (12) for installing the second reset assembly (9), and one end of the second compression spring (91) is fixed in the second mounting groove (12).

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