Back locking mechanism of door lock

Abstract

The utility model discloses a door lock counter locking mechanism, and relates to the technical field of door locks, the door lock counter locking mechanism comprises a counter locking sleeve rotatably arranged in an inner handle and a driving plate slidably arranged in the inner handle, the counter locking sleeve is provided with a deflector rod arranged in the radial direction, and the driving plate is provided with a notch groove allowing the deflector rod to be inserted therein; the driving plate is further provided with a back locking button penetrating out of the inner handle, and the back locking sleeve is rotated by controlling the driving plate to move. The structure is simple, the size of the handle is small, and the counter lock sleeve operates stably.

Description

Technical Field

[0001] The present application relates to the technical field of door locks, and in particular to a door lock anti-locking mechanism. Background Art

[0002] Door lock is a commonly used door protection device to prevent illegal intrusion, usually including a lock body and an inner door handle and an outer door handle installed inside the door, as well as an anti-lock mechanism; wherein the anti-lock mechanism of the door lock is designed to improve indoor privacy. The traditional knob-type anti-lock mechanism is set on the door lock independently of the door handle, which makes the lock body large and the internal structure complicated. Therefore, a variety of anti-lock mechanisms combined with the inner handle have emerged. However, in the existing structure, the anti-lock button is located near the outer ring of the square shaft, such as CN216043101U and CN216043102U. On the one hand, it is impossible to hold the handle while holding the anti-lock button. The operation is inconvenient to use. On the other hand, due to the structural layout, the lock body is large and bulky. The anti-lock button is set on the handle grip and is controlled by longitudinal toggle along the length of the handle, such as CN217681059U and CN216110120U. Although it can be operated while holding the handle, the gear rack structure with balanced force makes the structure more complicated, the production cost is high, and the working noise is loud. The simple convex column guide groove structure, because of the obstruction of the sliding push piece, the outer end of the sleeve is suspended, the sleeve is subjected to uneven force during rotation, resulting in poor stability. Utility Model Content

[0003] In view of this, the present application provides a door lock anti-locking mechanism to solve the existing technical problems of complex structure, large size and unstable operation.

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

[0005] A door lock anti-lock mechanism includes an anti-lock sleeve rotatably arranged in an inner handle and a drive plate slidably arranged in the inner handle. The anti-lock sleeve has a radially arranged shift rod, the drive plate is provided with a notch for the shift rod to be inserted, and the drive plate also has an anti-lock button that passes through the inner handle. The anti-lock sleeve is rotated by controlling the movement of the drive plate.

[0006] Furthermore, a side of the shift lever away from the anti-lock button has an arc-shaped groove capable of hooking and cooperating with the driving plate.

[0007] Furthermore, transition reinforcement parts are provided between both sides of the fixed connection end of the shift rod and the main body of the anti-lock sleeve, and the corresponding guide arc surfaces of the transition reinforcement parts extend to the arc surface groove.

[0008] Furthermore, the end of the main body of the anti-lock sleeve has a boss, and the shift rod is arranged on the outer peripheral surface of the boss.

[0009] Furthermore, the drive plate has an ear plate located on one side of the anti-locking sleeve, the notch groove is arranged on one side of the ear plate, and the other side of the ear plate is provided with a supporting ridge that slides against the inner wall of the inner handle.

[0010] Furthermore, the positions of the supporting ridges correspond to the positions of the notches.

[0011] Furthermore, a latching slot 7 is provided on the driving plate and can be used in conjunction with a locking mechanism provided in the inner handle.

[0012] It can be seen from the above technical solution that the advantages of the utility model are:

[0013] 1. In this application, the combination of the shifting rod and the notch groove can drive the anti-locking sleeve to rotate, which has a simple structure and makes the body small, compact and beautiful.

[0014] 2. In this application, the anti-lock button is set at the grip part of the inner handle and is moved along the length direction of the handle, so that the operation is convenient.

[0015] 3. In this application, the lever and the notch groove cooperate with each other. When the anti-lock button is pushed toward the anti-lock sleeve, the end of the lever cooperates with the notch groove, and a large torque is generated, which can save effort in pushing the anti-lock sleeve to rotate; when the anti-lock button is pushed away from the anti-lock sleeve, the connecting end of the lever cooperates with the notch groove, and a small torque is generated, which can avoid unstable operation when the hand force is too large. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0017] Figure 1 This is the installation diagram for this application.

[0018] Figure 2 This is a schematic diagram of the structure of this application Figure 1 .

[0019] Figure 3 This is a schematic diagram of the structure of this application Figure 2 .

[0020] Figure 4 This is an enlarged schematic diagram of the structure of the mating portion between the shift lever and the notch groove of this application.

[0021] Figure 5 For this application Figure 4 A schematic diagram of the structure at point A in FIG.

[0022] Explanation of the accompanying reference numerals: 1-inner handle; 2-anti-lock sleeve; 21-boss; 22-lever; 23-arc groove; 24-transition reinforcement portion; 3-driving plate; 31-slide plate portion; 32-ear plate; 33-notch groove; 34-support ridge; 35-reinforcement rib; 36-anti-lock button; 37-slot. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail in conjunction with the embodiments and drawings. Here, the illustrative embodiments of this application and their descriptions are used to explain this application, but are not intended to limit this application.

[0024] refer to Figures 1 to 5 ,like Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, this embodiment provides a door lock anti-lock mechanism, including an anti-lock sleeve 2 rotatably arranged in the inner handle 1 and a driving plate 3 slidably arranged in the inner handle 1, the anti-lock sleeve 2 has a radially arranged lever 22, and a notch groove 33 for inserting the lever 22 is provided on the side of the driving plate 3. The driving plate 3 also has an anti-lock button 36 that passes through the inner handle 1. The anti-lock sleeve 2 is rotated by controlling the movement of the driving plate 3. When the anti-lock button 36 is toggled toward the anti-lock sleeve 2, the end of the lever 22 is in contact with the notch groove 33 to push the anti-lock sleeve 2 to rotate. The force position of the lever 22 is at a greater distance from the center of the circle, resulting in a large torque, which can save effort in pushing the anti-lock sleeve to rotate; when the anti-lock button 36 is toggled away from the anti-lock sleeve 2, the connecting end of the lever 22 is in contact with the opening corner of the notch groove 33 to push the anti-lock sleeve 2 to rotate. The force position of the lever 22 is at a smaller distance from the center of the circle, resulting in a small torque, which avoids unstable operation when the hand force is too large. Compared with the gear structure, the above structure is simple, has a low manufacturing cost, and will not excessively increase the size of the handle.

[0025] Preferably, in the present application, the driving plate 3 is arranged to slide along the length direction of the inner handle 1 to facilitate operation when holding the inner handle 1.

[0026] The driving plate 3 can also be slidably arranged along the width direction of the inner handle 1 .

[0027] In this embodiment, the side of the lever 22 away from the anti-lock button 36 has an arcuate groove 23 that can engage with the drive plate 3. The arcuate groove 23 increases the contact area between the drive plate 3 and the lever 22, dispersing the force. The notch 33 has a circular chamfer at the opening corner that mates with the arcuate groove 23.

[0028] In this embodiment, transition reinforcements 24 are provided between the fixed connection end of the lever 22 and the main body of the anti-lock sleeve 2 on both sides. The corresponding curved guide surfaces of the transition reinforcements 24 extend to the curved groove 23. When the anti-lock button 36 is moved away from the anti-lock sleeve 2, the connection end of the lever 22 abuts against the corner of the notched groove 33, pushing the anti-lock sleeve 2 to rotate. The force-bearing position of the lever 22 is relatively close to the center of the circle, resulting in high thrust and low torque. The provision of the transition reinforcements 24 increases the strength of the connection of the lever 22, making it less susceptible to deformation under force.

[0029] In this embodiment, the end of the main body of the anti-lock sleeve 2 has a boss 21, and the lever 22 is arranged on the outer circumference of the boss 21. By providing the boss 21 to abut against the inner handle 1, the center of the anti-lock sleeve 2 is always in a compressed state, making the anti-lock sleeve 2 rotate smoothly.

[0030] In this embodiment, the drive plate 3 includes a slide plate portion 31 slidably disposed within the grip portion of the inside handle 1, and an ear plate 32 connected to the slide plate portion 31 and located on one side of the anti-lock sleeve 2. A notch 33 is provided on one side of the ear plate 32, and a supporting ridge 34 is provided on the other side of the ear plate 32 to abut and slide against the inner wall of the inside handle 1. The provision of the supporting ridge 34 increases the strength of the ear plate 32, making it less prone to deformation, and making the drive plate 3 compact. Furthermore, the remaining portion of the anti-lock sleeve 2 can be positioned against the inside handle 1, thereby effectively limiting the anti-lock sleeve 2 and providing good installation stability and smooth operation.

[0031] In this embodiment, the supporting ridges 34 correspond to the positions of the notch 33. This increases the strength of the ear plate 32 where the notch 33 is located, making the notch 33 less likely to deform, thereby making the cooperation with the shift lever 22 stable and reliable.

[0032] In this embodiment, the slide plate portion 31 is provided with a latching slot 37 that can cooperate with an elastic locking mechanism provided in the inner handle 1 .

[0033] In this embodiment, a reinforcing rib 35 is provided on the back of the ear plate 32 and is located on the main body side of the anti-locking sleeve 2, which increases the strength of the ear plate 32 as a whole and does not interfere with other mechanisms.

[0034] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Those skilled in the art will appreciate that various modifications and variations of the present embodiment are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A door lock anti-lock mechanism, characterized in that: The invention comprises a locking sleeve (2) rotatably arranged in the inner handle (1) and a driving plate (3) slidably arranged in the inner handle (1), wherein the locking sleeve (2) has a radially arranged shifting rod (22), the driving plate (3) is provided with a notch groove (33) for inserting the shifting rod (22), and the driving plate (3) is also provided with a locking button (36) passing through the inner handle (1), and the locking sleeve (2) is rotated by controlling the movement of the driving plate (3).

2. The door lock anti-lock mechanism according to claim 1, characterized in that: A side of the shifting rod (22) away from the anti-locking button (36) has an arcuate groove (23) capable of hooking and cooperating with the driving plate (3).

3. The door lock anti-lock mechanism according to claim 2, characterized in that: Transition reinforcement parts (24) are provided between both sides of the fixed connection end of the shifting rod (22) and the main body of the anti-locking sleeve (2), and the corresponding guide arc surface of the transition reinforcement part (24) extends to the arc surface groove (23).

4. The door lock anti-lock mechanism according to claim 3, characterized in that: The end of the main body of the anti-lock sleeve (2) has a boss (21), and the shift rod (22) is arranged on the outer peripheral surface of the boss (21).

5. The door lock anti-lock mechanism according to claim 1, characterized in that: The drive plate (3) has an ear plate (32) located on one side of the anti-lock sleeve (2), the notch groove (33) is provided on one side of the ear plate (32), and the other side of the ear plate (32) is provided with a supporting ridge (34) that abuts and slides against the inner wall of the inner handle (1).

6. The door lock anti-lock mechanism according to claim 5, characterized in that: The supporting ridge (34) corresponds to the position of the notch groove (33).

7. The door lock anti-lock mechanism according to claim 1, characterized in that: The drive plate (3) is provided with a latching slot (37) capable of cooperating with a locking mechanism provided in the inner handle (1).

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