Door handle locking mechanism and door handle

Abstract

The utility model discloses a door handle locking mechanism which comprises a handle mounting base, a rotating base and a limiting assembly. The limiting assembly comprises a movable seat, a limiting rod and a rotating shaft, the rotating seat is provided with first guide rods used for installing the movable seat in pairs, the rotating seat is provided with a through first limiting groove, the handle installing seat is provided with a second limiting groove which is coaxial with and communicated with the first limiting groove, the limiting rod is installed in the first limiting groove, and the rotating shaft is arranged in the second limiting groove. An elastic component for resetting the limiting rod is arranged in the first limiting groove; one of the movable seat and the rotating shaft is provided with an inclined plane extending along the axial direction, the other one of the movable seat and the rotating shaft is provided with an abutting block matched with the inclined plane, one end of the rotating shaft extends into the movable seat to enable the inclined plane to be in contact with the abutting block, and the movable seat is provided with an abutting part in contact with the limiting rod. According to the scheme, the limiting rod is pushed into the first limiting groove and the second limiting groove to limit rotation of the rotating base relative to the handle mounting base, so that locking of the door handle is achieved, and damage to the square shaft is avoided.

Description

Technical Field

[0001] This utility model relates to a door handle locking mechanism and a door handle. Background Technology

[0002] In existing door handle locking structures, the rotation of the square shaft is usually used for limiting. This design causes damage to the square shaft when the door handle is pressed in the locked state, or the square shaft deforms, causing damage to the mating part between the handle and the square shaft. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a door handle locking mechanism and a door handle, which restricts the rotation of the rotating seat relative to the handle mounting seat by pushing the limiting rod into the first limiting groove and the second limiting groove, so as to avoid damage to the other shaft.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a door handle locking mechanism, comprising a handle mounting base, a rotating base, and a limiting component; the handle mounting base is used for fixed connection with the door body; the rotating base is mounted on the handle mounting base and can rotate relative to the handle mounting base; the limiting component includes a movable base, a limiting rod, and a rotating shaft; the rotating base is provided with a pair of first guide rods for mounting the movable base; the rotating base is provided with a through first limiting groove; the handle mounting base is provided with a second limiting groove coaxial with and communicating with the first limiting groove; the limiting rod is installed in the first limiting groove. The first limiting groove is provided with an elastic component to reset the limiting rod; one of the movable seat and the rotating shaft is provided with an axially extending inclined surface, and the other is provided with a mating block. One end of the rotating shaft extends into the movable seat so that the inclined surface contacts the mating block. When the rotating shaft rotates, the mating block and the inclined surface cooperate to apply pressure to the movable seat, thereby causing the movable seat to move towards the handle mounting seat; the movable seat is provided with a mating part that contacts the limiting rod. When the movable seat moves, the mating part pushes the limiting rod to be located in the first limiting groove and the second limiting groove respectively, thereby restricting the rotation of the rotating seat relative to the handle mounting seat.

[0005] As a further improvement of this utility model, the inclined surface is provided with a recess or a flat surface to prevent the abutment block from retracting.

[0006] As a further improvement of this utility model, at least two inclined surfaces are provided, the number of abutting blocks corresponds to the number of inclined surfaces, and each abutting block is matched with an inclined surface.

[0007] As a further improvement of this utility model, the rotating shaft is a split structure, comprising a first component and a second component. The abutment block or inclined surface is disposed on the second component, and the first component and the second component are anti-rotationally fitted or fixedly connected.

[0008] As a further improvement of this utility model, at least two sets of the first limiting groove and the second limiting groove are provided, and the number of the abutting part, the limiting rod and the elastic component corresponds to the number of the first limiting groove.

[0009] As a further improvement of this utility model, the first guide rod is disposed at the opening of the first limiting groove facing the movable seat, the first guide rod is provided with a through hole for the limiting rod to move, and the movable seat is provided with a sliding part adapted to the outer diameter surface of the first guide rod, the sliding part and the outer diameter surface of the first guide rod cooperate to form a guide.

[0010] As a further improvement of this utility model, the rotating seat is provided with a pair of second guide rods, which cooperate with the movable seat hole shaft to form a guide.

[0011] As a further improvement of this utility model, the first limiting groove is provided with a first mounting surface for the installation of the elastic component, and the limiting rod is provided with a second mounting surface for the elastic component to abut against, and the elastic component is installed between the first mounting surface and the second mounting surface.

[0012] A door handle includes a door handle locking mechanism improved by any of the above-mentioned methods, a handle housing, and a cover plate. The rotating seat is fixedly connected to the handle housing, and the cover plate is installed on the handle housing. The rotating shaft is rotatably connected to the cover plate and restricts the axial movement of the rotating shaft relative to the cover plate. When the door handle needs to be locked, the rotating shaft is rotated by a tool to cause the abutment block to drive the movable seat, thereby pushing the limiting rod into the first limiting groove and the second limiting groove to achieve locking. When unlocking, the limiting rod is disengaged from the second limiting groove by rotating the rotating shaft in the opposite direction to achieve unlocking.

[0013] The beneficial effects of this utility model are as follows: by pushing the limiting rod into the first limiting groove and the second limiting groove to restrict the rotation of the rotating seat relative to the handle mounting seat, the door handle can be locked, thus avoiding damage to the opposite shaft. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the installation of the limiting rod according to an embodiment of the present utility model;

[0016] Figure 3 This is a schematic diagram of the movable seat in an embodiment of the present utility model;

[0017] Figure 4 This is a schematic diagram of the rotating shaft in an embodiment of the present utility model;

[0018] Figure 5 This is a schematic diagram of a door handle according to an embodiment of the present utility model.

[0019] Reference numerals in the attached figures: 1. Handle mounting base; 2. Rotating base; 3. Movable base; 4. Limiting rod; 5. Rotating shaft; 6. First guide rod; 7. First limiting groove; 8. Second limiting groove; 9. Elastic component; 10. Inclined surface; 11. Abutting block; 12. Abutting part; 13. Recess; 14. First component; 15. Second component; 16. Sliding part; 17. Second guide rod; 18. Handle housing; 19. Cover plate. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the embodiments shown in the accompanying drawings.

[0021] Reference Figure 1-5 As shown, this embodiment provides a door handle locking mechanism, including a handle mounting base 1, a rotating base 2, and a limiting component. The handle mounting base 1 is used for fixed connection with the door body. The rotating base 2 is mounted on the handle mounting base 1 and can rotate relative to the handle mounting base 1. The limiting component includes a movable base 3, a limiting rod 4, and a rotating shaft 5. The rotating base 2 is provided with a pair of first guide rods 6 for mounting the movable base 3. The rotating base 2 is provided with a through first limiting groove 7. The handle mounting base 1 is provided with a second limiting groove 8 that is coaxial with and communicates with the first limiting groove 7. The limiting rod 4 is installed in the first limiting groove 7, and the first limiting groove 7 is provided with an elastic mechanism to allow the limiting rod 4 to return to its original position. Component 9; one of the movable seat 3 and the rotating shaft 5 is provided with an axially extending inclined surface 10, and the other is provided with a mating block 11. One end of the rotating shaft 5 extends into the movable seat so that the inclined surface 10 contacts the mating block 11. When the rotating shaft 5 rotates, the mating block 11 and the inclined surface 10 cooperate to apply pressure to the movable seat 3, thereby causing the movable seat 3 to move towards the handle mounting seat 1. The movable seat 3 is provided with a mating part 12 that contacts the limiting rod 4. When the movable seat 3 moves, the mating part 12 pushes the limiting rod 4 to be located in the first limiting groove 7 and the second limiting groove 8 respectively, thereby restricting the rotation of the rotating seat 2 relative to the handle mounting seat 1.

[0022] The handle mounting base 1 and the door body can be securely assembled using bolts or snap-fit ​​fasteners. The rotating base 2 is rotatably connected to the handle mounting base 1, allowing it to rotate only relative to the handle mounting base 1. Pairs of first guide rods 6 are symmetrically distributed around the circumference of the rotating base 2, providing initial positioning and movement guidance for the movable base 3. The limiting rod 4 and the first limiting groove 7 are in sliding fit, allowing the limiting rod 4 to move within the first limiting groove 7. The elastic component 9 is a spring, with one end abutting the stepped surface within the first limiting groove 7 and the other end abutting the end face of the limiting rod 4. In this embodiment, the inclined surface 10 is provided on the movable base 3, and the abutting block 11 is provided on the rotating shaft 5. When locking is required, external force drives the rotating shaft 5 to rotate around its own axis. The abutting block 11 on the rotating shaft 5 maintains close surface contact with the inclined surface 10 within the movable base 3. As the rotating shaft 5 rotates, the engagement of the abutting block 11 and the inclined surface 10 applies axial pressure to the movable base 3, causing the movable base 3 to move smoothly towards the handle mounting base 1 along the axial direction of the first guide rod 6. During the movement of the movable seat 3, the abutment part 12 contacts the end face of the limiting rod 4 and applies an axial thrust. This thrust overcomes the elastic force of the elastic component 9 and pushes the limiting rod 4 towards the second limiting groove 8. Finally, the limiting rod 4 is partially embedded in the first limiting groove 7 and partially embedded in the second limiting groove 8. Through the cooperation of the limiting rod 4 and the two coaxially connected limiting grooves, the circumferential rotation of the rotating seat 2 relative to the handle mounting seat 1 is restricted, thus achieving reliable locking. When unlocking is required, an external force is applied in the opposite direction to drive the rotating shaft 5 to rotate, thereby releasing the restriction on the movable seat 3. The elastic component 9 recovers its deformation under its own elastic potential energy, generating a reverse reset force to push the limiting rod 4 back into the first limiting groove 7. The movable seat 3 resets along the first guide rod 6 under the reaction force of the limiting rod 4, and the rotating seat 2 regains its rotational freedom relative to the handle mounting seat 1.

[0023] To improve the stability of the locked state and prevent the abutment block 11 from accidentally retracting and causing unlocking, in one optional solution, the inclined surface 10 is provided with a recess 13 or a flat surface to prevent the abutment block 11 from retracting. The inclined surface 10 in the movable seat 3 maintains contact with the abutment block 11. The shape of the recess 13 is adapted to the contact end face of the abutment block 11, while the flat surface is parallel and fits against the contact surface of the abutment block 11, ensuring the reliability of the limit at the locked position. When the rotating shaft 5 drives the abutment block 11 to slide along the inclined surface 10 to the preset locked position, the abutment block 11 will be inserted into the recess 13 or completely fit against the flat surface. The two side walls of the recess 13 or the edge of the flat surface can axially limit the abutment block 11, preventing it from sliding backward along the inclined surface 10 without active unlocking force. This setting effectively avoids the abutment block 11 from retracting due to external factors such as door vibration or accidental collision, thereby preventing the locked state from being accidentally released.

[0024] Further optimization can be achieved by selecting the following method to improve the balance of driving force: at least two inclined planes 10 are provided, and the number of abutment blocks 11 corresponds to the number of inclined planes 10, with each abutment block 11 engaging with one of the inclined planes 10. At least two inclined planes 10 are evenly distributed circumferentially within the movable seat 3 to ensure balanced force distribution; the abutment blocks 11 on the rotating shaft 5 correspond one-to-one with the inclined planes 10. When the rotating shaft 5 rotates, all abutment blocks 11 simultaneously engage with their matching inclined planes 10, thus ensuring smooth force distribution during movement of the movable seat 3.

[0025] In some designs, to facilitate machining, assembly, and subsequent maintenance, the shaft 5 is designed as a split unit, comprising a first component 14 and a second component 15. An abutment block 11 or an inclined surface 10 is mounted on the second component 15. The first component 14 and the second component 15 are connected by an anti-rotation fit or a fixed connection. The anti-rotation fit between the first component 14 and the second component 15 can be achieved through spline fit, key fit, polygonal shaft hole fit, or pin positioning, while the fixed connection can be achieved through bolt connection or riveting, meeting the installation space requirements of different door handles. During operation, external force drives the first component 14 to rotate, transmitting torque to the second component 15 through the anti-rotation fit or fixed connection structure. The second component 15 then drives the abutment block 11 to rotate synchronously and slide along the inclined surface 10, ensuring that the shaft 5 can stably and reliably transmit driving force.

[0026] To enhance the locking effect and improve the load-bearing capacity of the rotating seat 2 during locking, in one optional scheme, at least two sets of first limiting grooves 7 and second limiting grooves 8 are provided. The number of abutment parts 12, limiting rods 4, and elastic components 9 corresponds to the number of first limiting grooves 7. Multiple sets of first limiting grooves 7 on the rotating seat 2 are evenly distributed circumferentially. The second limiting grooves 8 on the handle mounting seat 1 correspond one-to-one with the first limiting grooves 7. Each first limiting groove 7 is independently equipped with a limiting rod 4 and an elastic component 9. The abutment parts 12 on the movable seat 3 correspond one-to-one with the limiting rods 4. Multiple sets of limiting rods 4 together form a circumferential limit on the rotating seat 2. Compared to a single-set limiting structure, a multi-set limiting structure can effectively disperse the external torque received by the rotating seat 2 during locking, preventing a single limiting rod 4 from bearing excessive load, leading to deformation, bending, or damage, thus improving the load-bearing capacity and service life of the locking mechanism.

[0027] Specifically, the guide structure of the movable seat 3 can be optimized to improve the accuracy and smoothness of the movement of the movable seat 3. The first guide rod 6 is set at the opening of the first limiting groove 7 facing the movable seat 3. The first guide rod 6 is provided with a through hole for the limiting rod 4 to move. The movable seat 3 is provided with a sliding part 16 that is adapted to the outer diameter surface of the first guide rod 6. The sliding part 16 cooperates with the outer diameter surface of the first guide rod 6 to form a guide.

[0028] The first guide rod 6 and the rotating seat 2 are integrally formed, and its installation position is directly opposite the opening of the first limiting groove 7 facing the movable seat 3, ensuring that the limiting rod 4 can pass through the through hole on the first guide rod 6 and move freely between the first limiting groove 7 and the second limiting groove 8; during the movement of the movable seat 3, the cooperation between the sliding part 16 and the first guide rod 6 not only restricts the circumferential rotation of the movable seat 3, but also ensures that the movable seat 3 moves only along the axial direction.

[0029] To further improve the stability of the movable seat 3 during movement and prevent it from wobbling, in some designs, the rotating seat 2 is provided with a pair of second guide rods 17. The second guide rods 17 cooperate with the bore shaft of the movable seat 3 to form a guide. The pair of second guide rods 17 are integrally formed with the rotating seat 2 and are symmetrically distributed along the circumference of the movable seat 3. The provision of second guide rods 17 further enhances the stability of the movable seat 3 during movement.

[0030] To ensure the stability of the elastic component 9 and its ability to reliably reset the limiting rod 4, in one optional configuration, the first limiting groove 7 has a first mounting surface for the elastic component 9, and the limiting rod 4 has a second mounting surface for the elastic component 9 to abut against. The elastic component 9 is installed between the first and second mounting surfaces. The first mounting surface in the first limiting groove 7 is a flat annular end face or a stepped surface, and the second mounting surface on the limiting rod 4 is an annular end face parallel to the first mounting surface. The two ends of the spring are respectively attached to the first and second mounting surfaces.

[0031] A door handle, including any of the above-mentioned improved door handle locking mechanisms, further includes a handle housing 18 and a cover plate 19. A rotating seat 2 is fixedly connected to the handle housing 18, and the cover plate 19 is installed on the handle housing 18. A rotating shaft 5 is rotatably connected to the cover plate 19 and restricts the axial movement of the rotating shaft 5 relative to the cover plate 19. When the door handle needs to be locked, the rotating shaft 5 is rotated by a tool to cause the abutment block 11 to drive the movable seat 3, thereby pushing the limiting rod 4 into the first limiting groove 7 and the second limiting groove 8 to achieve locking. When unlocking, the limiting rod 4 is disengaged from the second limiting groove 8 by rotating the rotating shaft 5 in the opposite direction to achieve unlocking.

[0032] The rotating base 2 and the handle housing 18 can be fixed by bolts or snap-fit ​​connections to ensure synchronous rotation. The cover plate 19 is installed on the handle housing 18 by bolts, snap-fit ​​connections, or threaded connections. The rotating shaft 5 is rotatably connected to the cover plate 19 by a bushing. The cover plate 19 is provided with an axial limiting structure, such as a stepped surface or a retaining ring groove, to limit the axial displacement of the rotating shaft 5, ensuring that the rotating shaft 5 can only rotate around its own axis and cannot move or shift axially. When the door handle needs to be locked, use a tool or key to insert into the cross groove or keyhole at the end of the rotating shaft 5, apply circumferential force to rotate the rotating shaft 5, the rotating shaft 5 drives the abutment block 11 to cooperate with the inclined surface 10 in the movable seat 3, push the movable seat 3 to move towards the handle mounting seat 1, the abutment part 12 of the movable seat 3 simultaneously pushes the limit rod 4 into the first limit groove 7 and the second limit groove 8, the mechanical limit of the limit rod 4 restricts the rotation of the rotating seat 2 relative to the handle mounting seat 1, thereby realizing the locking of the door handle; when unlocking, rotate the rotating shaft 5 in the opposite direction, the abutment block 11 slides in the opposite direction along the inclined surface 10, the pressure on the movable seat 3 is released, the elastic component 9 pushes the limit rod 4 to reset and disengage from the second limit groove 8, the rotating seat 2 restores its rotation ability relative to the handle mounting seat 1, and the door handle can be gripped and operated normally.

[0033] The above are merely preferred embodiments 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 within its protection scope. 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 its protection scope.

Claims

1. A door handle locking mechanism, characterized in that, Includes handle mounting base, rotating base, and limit assembly; The handle mounting bracket is used for fixed connection with the door body; The rotating seat is mounted on the handle mounting seat and can rotate relative to the handle mounting seat; The limiting assembly includes a movable seat, a limiting rod, and a rotating shaft. The rotating seat is provided with a pair of first guide rods for mounting the movable seat. The rotating seat is provided with a through first limiting groove. The handle mounting seat is provided with a second limiting groove that is coaxial with and connected to the first limiting groove. The limiting rod is installed in the first limiting groove. The first limiting groove is provided with an elastic component that allows the limiting rod to return to its original position. The movable seat and the rotating shaft are provided with an axially extending inclined surface on one of them and a mating block on the other. One end of the rotating shaft extends into the movable seat so that the inclined surface contacts the mating block. When the rotating shaft rotates, the mating block and the inclined surface cooperate to apply pressure to the movable seat, thereby causing the movable seat to move toward the handle mounting seat. The movable seat is provided with an abutment part that contacts the limiting rod. When the movable seat moves, the abutment part pushes the limiting rod to be located in the first limiting groove and the second limiting groove respectively, thereby restricting the rotation of the rotating seat relative to the handle mounting seat.

2. The door handle locking mechanism according to claim 1, characterized in that, The inclined surface is provided with a recess or a flat surface to prevent the abutment block from retracting.

3. The door handle locking mechanism according to claim 2, characterized in that, The inclined plane is provided at least two, the number of abutting blocks corresponds to the number of inclined planes, and the abutting blocks are respectively matched with the inclined planes one by one.

4. The door handle locking mechanism according to claim 2, characterized in that, The rotating shaft is a split structure, comprising a first component and a second component. The abutment block or inclined surface is disposed on the second component, and the first component and the second component are anti-rotationally fitted or fixedly connected.

5. The door handle locking mechanism according to claim 2, characterized in that, At least two sets of the first limiting groove and the second limiting groove are provided, and the number of the abutting part, the limiting rod and the elastic component corresponds to the number of the first limiting groove.

6. The door handle locking mechanism according to claim 5, characterized in that, The first guide rod is disposed at the opening of the first limiting groove facing the movable seat. The first guide rod is provided with a through hole for the limiting rod to move. The movable seat is provided with a sliding part that is adapted to the outer diameter surface of the first guide rod. The sliding part cooperates with the outer diameter surface of the first guide rod to form a guide.

7. The door handle locking mechanism according to claim 6, characterized in that, The rotating seat is provided with a pair of second guide rods, which cooperate with the movable seat hole shaft to form a guide.

8. The door handle locking mechanism according to claim 1, characterized in that, The first limiting groove is provided with a first mounting surface for installing the elastic component, and the limiting rod is provided with a second mounting surface for the elastic component to abut against. The elastic component is installed between the first mounting surface and the second mounting surface.

9. A door handle, characterized in that, The door handle locking mechanism according to any one of claims 1-8 further includes a handle housing and a cover plate. The rotating seat is fixedly connected to the handle housing, and the cover plate is installed on the handle housing. The rotating shaft is rotatably connected to the cover plate and restricts the axial movement of the rotating shaft relative to the cover plate. When the door handle needs to be locked, the rotating shaft is rotated by a tool to cause the abutment block to drive the movable seat, thereby pushing the limiting rod into the first limiting groove and the second limiting groove to achieve locking. When unlocking, the limiting rod is disengaged from the second limiting groove by rotating the rotating shaft in the opposite direction to achieve unlocking.

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