Back locking structure of handle lock

Abstract

The utility model discloses a back locking structure of a handle lock. The back locking structure comprises an inner handle seat, an inner handle, an outer handle seat and an outer handle, a back locking assembly is arranged in the inner handle and comprises a back locking plug pin, a reset spring and a back locking rotary knob rotationally arranged on the inner handle, the back locking plug pin is arranged in the inner handle in an up-down moving mode, the lower end of the back locking plug pin abuts against the reset spring, and the upper end of the back locking plug pin is matched with the back locking rotary knob. A back locking cam is arranged at the lower end of the back locking rotary knob, the back locking rotary knob is rotated, the back locking cam extrudes downwards and drives the lower end of the back locking bolt to penetrate out of the inner handle to be inserted into a locking groove in the inner handle seat, the back locking bolt firmly locks the inner handle on the inner handle seat, and the outer handle is in linkage with the inner handle through a square shaft. Meanwhile, the outer handle is locked; back locking of the door lock is realized; the problem that an existing door lock is prone to being blocked due to the fact that a locking ball cannot move smoothly is solved. And the smoothness of back locking and unlocking operation of the door lock is ensured.

Description

Technical Field

[0001] This utility model relates to the field of door lock technology, and more specifically, to a deadbolt structure for a lever handle lock. Background Technology

[0002] A door lock is a commonly used door security device to prevent unauthorized intrusion by outsiders. A door lock typically includes a lock body, an inner handle, an outer handle, and a locking mechanism to lock the door. Generally, the locking mechanism locks the door handle to the handle seat, preventing people from unlocking the door by turning the handle.

[0003] For example, Chinese utility model patent CN216043101U discloses a worm gear type deadbolt mechanism for a door lock, a locking assembly for locking a door handle. The locking assembly includes a square shaft sleeve, a locking cam, and a locking ball that cooperates with the locking cam. One end of the square shaft sleeve is fixedly connected to the outside door handle, and the other end passes through the locking seat of the outer panel and is connected to the square shaft. The locking cam is rotatably disposed inside the square shaft sleeve, and one end of the locking cam is connected to a rotating rod. When the rotating rod drives the locking cam to rotate, the locking cam causes the locking ball to be pressed outward, so that a part of the locking ball passes through the ball hole of the square shaft sleeve and is placed in the locking groove of the locking seat. The locking cam has two cam surfaces adapted to the locking ball, and the cam surfaces are symmetrically disposed on the locking cam. A part of the locking ball passes through the ball hole of the square shaft sleeve and is placed on the locking seat, locking the outside door handle to the locking seat.

[0004] This door lock achieves its locking and unlocking functions by having a locking ball move back and forth relative to the locking groove; however, this structure is prone to jamming due to the locking ball not moving smoothly, affecting the smoothness of the locking and unlocking operations. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a deadbolt structure for a lever lock.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A deadbolt structure for a lever lock includes an inner lever rotatably mounted on an inner lever base and an outer lever rotatably mounted on an outer lever base. The inner lever and the outer lever are linked by a square shaft. A deadbolt assembly is provided inside the inner lever. The deadbolt assembly includes a deadbolt pin, a return spring, and a deadbolt knob rotatably mounted on the inner lever. The deadbolt pin is vertically movable within the inner lever.

[0008] The lower end of the deadbolt knob is provided with a deadbolt cam that cooperates with the deadbolt pin. When the deadbolt knob is rotated, the deadbolt cam presses down and drives the lower end of the deadbolt pin through the inner handle and into the locking groove on the inner handle seat. At the same time, the deadbolt pin compresses the return spring downward.

[0009] The present invention further includes: the upper end of the anti-locking pin is spirally provided with a mating surface, and the anti-locking cam moves along the mating surface;

[0010] The lower end of the locking pin has two pin feet, and the reset spring is located between the two pin feet.

[0011] The present invention further includes: a through hole at the lower end of the inner handle for the deadbolt to pass through, and the through hole is correspondingly provided with the locking groove.

[0012] The present invention further provides that the knob part of the anti-lock knob is provided with an anti-lock positioning groove and an unlock positioning groove;

[0013] The inner handle is provided with a positioning component, which includes a positioning spring and a positioning ball placed from bottom to top in the mounting hole of the inner handle. The positioning spring drives the positioning ball to cooperate with the anti-locking positioning groove or the unlocking positioning groove to lock the anti-locking knob in the anti-locking position or the unlocking position.

[0014] The present invention further includes: a limiting groove is provided at the upper end of the inner handle, and a limiting block is provided on the lower end face of the knob, which is placed in the limiting groove. The limiting block cooperates with the limiting groove to limit the rotation angle of the locking knob.

[0015] The present invention further includes: several anti-slip grooves are provided on the circumferential side of the knob.

[0016] The present invention further includes a lock cylinder inside the outer handle, and the lock cylinder is connected to the deadbolt knob via a linkage bar.

[0017] The present invention is further provided with: a lock cylinder cover is rotatably provided on the end of the outer handle, and a rotating shaft is eccentrically provided on the lower end of the lock cylinder cover, and a mounting spring is sleeved on the rotating shaft;

[0018] The lower end of the mounting spring abuts against the rotating shaft, and its upper end abuts against the outer handle.

[0019] The present invention further comprises: the grip portion of the outer handle is hollowly provided with a storage cavity for storing a key, and an end cap is threadedly provided at the end of the storage cavity, and a slot for inserting a key is provided on the inner side of the end cap.

[0020] The present invention is further provided with: the inner wall of the receiving cavity is provided with an internal thread, and the end cap is provided with an external thread, and the end cap is threadedly connected to the outer handle.

[0021] The beneficial effects of this utility model are as follows: The inner handle of this door lock is equipped with a deadbolt assembly, which includes a deadbolt pin, a return spring, and a deadbolt knob rotatably mounted on the inner handle. The deadbolt pin is vertically movable within the inner handle, with its lower end abutting against the return spring and its upper end engaging with the deadbolt knob. The lower end of the deadbolt knob is equipped with a deadbolt cam. When the door lock is deadbolted, rotating the deadbolt knob causes the deadbolt cam to press downwards and drive the lower end of the deadbolt pin through the inner handle and into the locking groove on the inner handle seat. Simultaneously, the deadbolt pin compresses the return spring downwards. The deadbolt pin firmly locks the inner handle onto the inner handle seat, while the outer handle is linked to the inner handle via a square shaft, thus locking the outer handle as well. This achieves deadbolt locking of the door lock, replacing the existing technology that uses locking balls to achieve deadbolt locking, thus solving the problem of jamming caused by the locking balls not moving smoothly in existing door locks. This ensures the smoothness of the deadbolt and unlocking operations of the door lock. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the deadbolt structure of a lever handle lock according to the present invention;

[0023] Figure 2 This is a diagram showing the mating of the deadbolt assembly and the inner handle seat in the deadbolt structure of a lever lock according to this utility model.

[0024] Figure 3 This is a schematic diagram of the structure of the deadbolt assembly of a lever handle lock according to the present invention;

[0025] Figure 4 This is a diagram showing the fit between the lock cylinder and the deadbolt knob in the deadbolt structure of a lever handle lock according to this utility model;

[0026] Figure 5 This is a schematic diagram of the lock cylinder cover of the deadbolt structure of a lever handle lock according to this utility model;

[0027] Figure 6 This is a schematic diagram of the outer handle of the deadbolt structure of a lever lock according to the present invention;

[0028] Figure 7 This is a schematic diagram of the inner handle of the deadbolt structure of a lever lock according to the present invention;

[0029] Explanation of reference numerals in the attached drawings: 1. Inner handle seat; 11. Locking groove; 2. Inner handle; 21. Through hole; 23. Limiting groove; 3. Outer handle seat; 4. Outer handle; 41. Lock cylinder; 42. Lock cylinder cover; 421. Rotary shaft; 422. Mounting spring; 43. Receiving cavity; 44. End cover; 45. Key; 5. Square shaft; 6. Deadbolt assembly; 61. Deadbolt pin; 611. Mating surface; 62. Return spring; 63. Deadbolt knob; 631. Deadbolt cam; 632. Knob part; 6321. Deadbolt positioning groove; 6322. Unlock positioning groove; 6323. Limiting block; 6324. Anti-slip groove; 7. Positioning assembly; 71. Positioning spring; 72. Positioning ball; 8. Linkage bar. Detailed Implementation

[0030] See attached document Figures 1 to 7 The present invention provides a more detailed description of the deadbolt structure of a lever handle lock.

[0031] A deadbolt structure for a lever lock includes an inner lever 2 rotatably mounted on an inner lever base 1 and an outer lever 4 rotatably mounted on an outer lever base 3. The inner lever 2 and the outer lever 4 are linked by a square shaft 5. A deadbolt assembly 6 is provided inside the inner lever 2. The deadbolt assembly 6 includes a deadbolt pin 61, a return spring 62, and a deadbolt knob 63 rotatably mounted on the inner lever 2. The deadbolt pin 61 is vertically movable inside the inner lever 2, and the lower end of the deadbolt pin 61 abuts against the return spring 62.

[0032] The lower end of the deadbolt knob 63 is provided with a deadbolt cam 631 that cooperates with the deadbolt pin 61. When the door lock is deadbolted, rotating the deadbolt knob 63 causes the deadbolt cam 631 to press downward and drive the lower end of the deadbolt pin 61 through the inner handle 2 and into the locking groove 11 on the inner handle seat 1. At the same time, the deadbolt pin 61 compresses the return spring 62 downward. The deadbolt pin 61 firmly locks the inner handle 2 onto the inner handle seat 1. The outer handle 4 is linked to the inner handle 2 through the square shaft 5, which also locks the outer handle 4. This achieves deadbolting of the door lock and replaces the existing technology of achieving deadbolting through locking ball bearings. It solves the problem that existing door locks are prone to jamming due to the locking ball bearings not moving smoothly. This ensures the smoothness of the deadbolt and unlocking operations of the door lock.

[0033] When unlocking, rotate the deadbolt knob 63 in the opposite direction so that the deadbolt cam 631 at the lower end of the deadbolt knob 63 is displaced from the upper end of the deadbolt pin 61. The deadbolt pin 61 moves upward under the action of the return spring 62 and separates from the locking groove 11 on the inner handle seat 1, thereby releasing the locking effect on the inner handle 2 and unlocking the door lock.

[0034] The upper end of the locking pin 61 is spirally provided with a mating surface 611, and the locking cam 631 moves along the mating surface 611. The lower end of the locking pin 61 is provided with two pin feet, and the return spring 62 is provided between the two pin feet. The inner handle seat 1 is provided with two locking grooves 11 that are adapted to the pin feet. The lower end of the inner handle 2 is provided with a through hole 21 for the pin feet to pass through, and the through hole 21 is correspondingly provided with the locking groove 11. When the locking knob 63 is rotated, the locking cam 631 of the locking knob 63 will continuously press the mating surface 611 downward, causing the locking pin 61 to gradually move downward, and the pin feet will pass through the through hole 21 and be inserted into the corresponding locking groove 11.

[0035] The locking knob 63 has a knob portion 632 with a locking positioning groove 6321 and an unlocking positioning groove 6322. The inner handle 2 is provided with a positioning component 7, which includes a positioning spring 71 and a positioning ball 72 placed from bottom to top in the mounting hole of the inner handle 2. The positioning spring 71 drives a part of the positioning ball 72 to pass through the mounting hole and cooperate with the locking positioning groove 6321 or the unlocking positioning groove 6322 to lock the locking knob 63 in the locking or unlocking position, thereby improving the stability of the locking knob 63 in the locking and unlocking positions and improving the feel of the locking knob 63.

[0036] The inner handle 2 has a limiting groove 23 at its upper end, and the knob part 632 has a limiting block 6323 placed in the limiting groove 23 at its lower end. The limiting block 6323 cooperates with the limiting groove 23 to limit the rotation angle of the locking knob 63. That is, when the locking knob 63 is rotated to the locking position or the unlocking position, the limiting block 6323 is exactly abutting against the corresponding side wall of the limiting groove 23, preventing the locking knob 63 from continuing to rotate and avoiding over-rotation. The knob part 632 has several anti-slip grooves 6324 circumferentially arranged on its side. The anti-slip grooves 6324 increase the friction between the operator's fingers and the locking knob 63 and prevent slippage.

[0037] The outer handle 4 is equipped with a lock cylinder 41, which is connected to the deadbolt knob 63 via a linkage bar 8. People outside the door can use a key 45 to drive the lock cylinder 41 to rotate the deadbolt knob 63, thereby realizing the deadbolt and unlocking operations of the door lock.

[0038] The outer handle 4 is rotatably mounted with a lock cylinder cover 42 at its end. The lower end of the lock cylinder cover 42 is eccentrically mounted with a rotating shaft 421. A mounting spring 422 is sleeved on the rotating shaft 421. The lower end of the mounting spring 422 abuts against the rotating shaft 421, and its upper end abuts against the outer handle 4. The lock cylinder cover 42 is firmly fixed to the end of the outer handle 4 to cover the lock cylinder 41, prevent dust from entering the lock cylinder 41 hole, and improve the appearance of the door lock. When emergency unlocking is required using the key 45, the lock cylinder cover 42 only needs to be rotated to one side, and the lock cylinder cover 42 will rotate around the eccentrically mounted rotating shaft 421, exposing the lock cylinder 41.

[0039] The outer handle 4 has a hollow grip portion with a storage cavity 43 for storing the key 45 (the door lock is used for interior doors). The end of the storage cavity 43 is threaded with an end cap 44, and the inner side of the end cap 44 is provided with a slot for inserting the key 45. The inner wall of the storage cavity 43 is provided with an internal thread, and the end cap 44 is provided with an external thread. The end cap 44 is threadedly connected to the outer handle 4. This not only improves the concealment of the key 45, but also prevents the key 45 from being lost.

[0040] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A deadbolt structure for a lever lock, comprising an inner lever rotatably mounted on an inner lever seat and an outer lever rotatably mounted on an outer lever seat, wherein the inner lever and the outer lever are linked by a square shaft; characterized in that: The inner handle is provided with a deadbolt assembly, which includes a deadbolt pin, a return spring, and a deadbolt knob rotatably disposed on the inner handle. The deadbolt pin is disposed vertically within the inner handle. The lower end of the deadbolt knob is provided with a deadbolt cam that cooperates with the deadbolt pin. When the deadbolt knob is rotated, the deadbolt cam presses down and drives the lower end of the deadbolt pin through the inner handle and into the locking groove on the inner handle seat. At the same time, the deadbolt pin compresses the return spring downward.

2. The deadbolt structure of a lever handle lock according to claim 1, characterized in that: The upper end of the anti-locking pin is helically provided with a mating surface, and the anti-locking cam moves along the mating surface; The lower end of the locking pin has two pin feet, and the reset spring is located between the two pin feet.

3. The deadbolt structure of a lever handle lock according to claim 2, characterized in that: The lower end of the inner handle is provided with a through hole for the deadbolt to pass through, and the through hole is correspondingly provided with the locking groove.

4. The deadbolt structure of a lever lock according to claim 1, 2, or 3, characterized in that: The knob part of the anti-lock knob is provided with an anti-lock positioning groove and an unlock positioning groove; The inner handle is provided with a positioning component, which includes a positioning spring and a positioning ball placed from bottom to top in the mounting hole of the inner handle. The positioning spring drives the positioning ball to cooperate with the anti-locking positioning groove or the unlocking positioning groove to lock the anti-locking knob in the anti-locking position or the unlocking position.

5. The deadbolt structure of a lever handle lock according to claim 4, characterized in that: The upper end of the inner handle is provided with a limiting groove, and the lower end face of the knob is provided with a limiting block placed in the limiting groove. The limiting block cooperates with the limiting groove to limit the rotation angle of the locking knob.

6. The deadbolt structure of a lever handle lock according to claim 5, characterized in that: The knob part has several anti-slip grooves on its side circumferentially.

7. The deadbolt structure of a lever lock according to claim 1, 2, or 3, characterized in that: The outer handle is equipped with a lock cylinder, which is connected to the deadbolt knob via a linkage bar.

8. The deadbolt structure of a lever handle lock according to claim 7, characterized in that: A lock cylinder cover is rotatably provided on the end of the outer handle, and a rotating shaft is eccentrically provided at the lower end of the lock cylinder cover. A mounting spring is sleeved on the rotating shaft. The lower end of the mounting spring abuts against the rotating shaft, and its upper end abuts against the outer handle.

9. The deadbolt structure of a lever handle lock according to claim 8, characterized in that: The outer handle has a hollow grip portion with a storage cavity for storing keys. The end of the storage cavity is detachably provided with an end cap, and the inner side of the end cap is provided with a slot for inserting keys.

10. The deadbolt structure of a lever handle lock according to claim 9, characterized in that: The inner wall of the storage cavity is provided with internal threads, and the end cap is provided with external threads. The end cap is threadedly connected to the outer handle.

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