Handrail rotation control mechanism

Abstract

The utility model provides a handrail rotation control mechanism which comprises a base, a rotating assembly and a control piece, the control piece is arranged on the rotating assembly in a sliding mode, and the control piece and the rotating assembly rotate on the base together. The first locking part and the second locking part between the base and the control piece are selectively locked in an inserted mode or unlocked in a separated mode under the condition that the control piece slides; when a user directly presses the control piece, the control piece slides for unlocking so as to enter an adjusting state; after the user loosens the control piece, the elastic reset piece gives elastic force to the control piece to enable the first locking part and the second locking part to be inserted and locked again, so that switching to the locking state is completed; the elastic reset piece can also keep the locking of the first locking part and the second locking part under the condition that the control piece is not stressed; due to the fact that the control piece and the rotating assembly rotate synchronously, when the control piece and the base are locked, the control piece cannot continue to rotate, the rotating assembly cannot rotate any more, and the rotating assembly has supporting force for supporting the arms of the human body.

Description

Technical Field

[0001] This utility model relates to the field of furniture, and in particular to a control mechanism for the rotation of armrests. Background Technology

[0002] As one of the most common pieces of furniture, chairs are increasingly demanding higher and higher standards of functionality. For example, to increase arm support when sitting, chairs are often equipped with armrests. However, conventional fixed armrests can no longer adapt to the diverse usage scenarios of people today and therefore cannot meet current needs. Such products will be gradually phased out.

[0003] Therefore, dynamic armrests have emerged. The biggest feature of this type of armrest is that it can be raised, lowered, rotated left and right, and rotated up and down to adapt to different arm postures of the human body in different scenarios, such as working, resting, reading, and playing with a mobile phone. However, in existing dynamic armrests, only the raising and lowering functions are switched on and off. The up and down rotation adjustment of the armrest has no structural locking. It is easy to accidentally bump into it after the adjustment is completed, causing the position to change, resulting in a poor user experience. Summary of the Invention

[0004] To address the aforementioned technical problems, this utility model provides a control mechanism for armrest rotation, comprising a base, a rotating assembly, and a control component. The control component is slidably mounted on the rotating assembly, and both rotate together on the base. The first locking part and the second locking part between the base and the control component selectively engage and lock or disengage and unlock when the control component slides. When the user directly presses the control component, the control component slides to unlock, thus entering the adjustment state. When the user releases the control component, an elastic reset component applies a spring force to the control component, causing the first locking part and the second locking part to engage and lock again, thus completing the switch to the locked state. The elastic reset component can also maintain the locking of the first locking part and the second locking part when the control component is not subjected to force.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A control mechanism for rotating a handrail includes a base, a rotating assembly, and a control component. The base serves as a main support, the rotating assembly is rotatably mounted on the base, and the control component is slidably mounted within the rotating assembly and rotates with it. The base includes a first locking part located inside the rotating assembly, and the control component includes a second locking part located inside the rotating assembly and beside the first locking part. The first and second locking parts are selectively engaged and locked. An elastic reset member is provided between the rotating assembly or the base and the control component. The control mechanism includes a locked state and an adjustable state: in the locked state, the elastic reset member applies a spring force to the control component to engage the first and second locking parts; when switching from the locked state to the adjustable state, the control component responds to a pressing force towards the rotating assembly, causing the second locking part to move together, thereby disengaging the first and second locking parts; in the adjustable state, the rotating assembly can rotate on the base.

[0007] The locking mechanism after rotation adjustment provides stable support for the arm: the control component is located in the rotation component, and both rotate together on the base. Since the control component and the rotation component rotate synchronously, when the control component is locked to the base, the control component cannot continue to rotate, and the rotation component can no longer rotate, thus achieving structural locking and providing sufficient support for the human arm.

[0008] Easy to switch between locked and unlocked states, convenient operation: The control component is slidably mounted on the rotating assembly. The first and second locking parts between the base and the control component can selectively engage and lock or disengage and unlock when the control component slides. When the user presses the control component, it slides to unlock and enter the adjustment state. When the user releases the control component, the elastic reset component applies spring force to the control component, causing the first and second locking parts to engage and lock again, thus completing the switch to the locked state. The elastic reset component can also maintain the locking of the first and second locking parts when the control component is not under force.

[0009] Preferably, the control also includes a button protruding from the rotating assembly, which moves the second locking part in response to pressure. The button protruding from the rotating assembly makes it convenient for the user to press.

[0010] Preferably, the second locking part is located on the control member at the end furthest from the button, and the first locking part is located on the base at the end furthest from the button, with the first locking part positioned between the second locking part and the button. In the sliding direction of the control member, the second locking part and the button are located at opposite ends of the control member, with the first locking part positioned between the second locking part and the button. Due to this positional relationship, when the button is pushed inward, the second locking part can directly move away from the first locking part to disengage.

[0011] Preferably, the control component includes a main body with a frame structure, and the base is fitted within the main body. A button is located at either end of the left or right side of the main body and protrudes outward from the main body. A second locking part is located at the other end of the main body, and the button and the second locking part are respectively located on both sides of the base. The main body is a rectangular frame, and both the button and the second locking part are located on this frame-like main body. Therefore, the control component moves as a whole. When the button is pushed, the main body moves together, and the second locking part on it also moves together. No other transmission structure or parts are required, resulting in a simple structure and low cost. The control component is integrally molded. The base is fitted within the main body, so that the first locking part is located between the second locking part and the button. Pushing the button can disengage the first locking part from the second locking part.

[0012] Preferably, the upper end of the base is semi-cylindrical, and the second locking part protrudes upward from the main body and is arc-shaped to adapt to the upper end of the base. The semi-cylindrical upper end of the base allows the rotating assembly to rotate smoothly on the base, and the second locking part is arc-shaped to adapt to the shape of the upper end of the base so that it can continue to lock with the first locking part on the base after rotation.

[0013] Preferably, the rotating assembly includes a base plate and a support member connected one above the other. The support member is located above the base plate, and the control member is mounted on the base plate. The support member is configured to support the user's arm and prevent the control member from detaching from the base plate. A sliding groove is provided on the base plate, extending along the sliding direction of the control member. The control member is mounted in the groove and slides within it. Since the control member has a frame structure, the sliding groove serves both to limit the movement of the control member and to provide sliding space.

[0014] Preferably, the elastic reset element is a spring, and the plate base also has a spring receiving groove on the side of the slide groove. The spring receiving groove is parallel to the slide groove, and the end of the main body with the button protrudes towards the base with a spring seat. The spring is set in the spring receiving groove and the two ends of the spring abut against the plate base and the spring seat respectively.

[0015] Preferably, the plate base has a mounting post protruding in the spring receiving groove for mounting the spring, and the spring seat also has a mounting post, with the two ends of the spring respectively sleeved on the two mounting posts.

[0016] Preferably, a locking protrusion and several position slots are provided between the first locking part and the second locking part. The position slots are circumferentially distributed around the rotation axis of the rotating assembly. The position slots are located on one of the first locking part or the second locking part, and the locking protrusion is located on the other of the first locking part or the second locking part. The control member and the base are locked together by the insertion of the position slots and the locking protrusion. The position slots are configured such that, in the adjustment state, when the locking protrusion enters different locking slots and switches to the locked state, the rotating assembly maintains the rotation angle at that time. The locking between the first locking part and the second locking part is achieved by the insertion of the position slots and the locking protrusion. When the locking protrusion is inserted into different position slots, the rotating assembly can be held at different rotation angles to adaptively support different human arm postures.

[0017] Preferably, the sliding direction of the control component is the same as the axial direction of the rotation axis of the rotating assembly.

[0018] The design starting point, concept, and beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0019] 1. The locking after rotation adjustment enables the rotating assembly to provide stable support for the arm: The control component is set in the rotating assembly, and the two rotate together on the base. Since the control component and the rotating assembly rotate synchronously, when the control component is locked to the base, the control component cannot continue to rotate, and the rotating assembly can no longer rotate, thereby achieving structural locking and enabling the rotating assembly to have sufficient support for the human arm.

[0020] 2. Easy to switch between locked and unlocked states, convenient operation: The control component is slidably mounted on the rotating assembly. The first and second locking parts between the base and the control component can selectively engage and lock or disengage and unlock when the control component slides. When the user presses the control component, it slides to unlock and enter the adjustment state. When the user releases the control component, the elastic reset component provides elastic force to the control component, causing the first and second locking parts to engage and lock again, thus completing the switch to the locked state. The elastic reset component can also maintain the locking of the first and second locking parts when the control component is not under force.

[0021] 3. The main body of the control component is a frame structure. The main body is embedded between the plate base and the support component, which makes it easy to limit the control component and provide sliding space. The button and the second locking part are both set on the main body. All three move together. There is no need to set other structures or parts for transmission between the button and the second locking part. The structure is simpler and the cost is lower. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the control mechanism used in the seat in an embodiment of the present invention;

[0023] Figure 2 This is an exploded view of the rotating assembly and control component in the embodiments of this utility model;

[0024] Figure 3 This is a three-dimensional structural diagram of the connection between the base, control component, and plate base in an embodiment of the present invention;

[0025] Figure 4 This is a three-dimensional structural diagram of the plate base in the embodiment of this utility model;

[0026] Figure 5 This is a three-dimensional structural diagram of the control component in the embodiment of the present invention;

[0027] Figure 6 This is a three-dimensional structural diagram of the base in an embodiment of the present invention.

[0028] The reference numerals in the attached drawings are as follows: base 1; rotating assembly 2; plate base 21; support member 22; control member 3; main body 31; first longitudinal rod 311; second longitudinal rod 312; first horizontal rod 313; second horizontal rod 314; button 32; first locking part 4; second locking part 5; elastic reset member 6; mounting part 7; front baffle 71; rear baffle 72; central protrusion 73; rotating groove 8; sliding groove 9; spring receiving groove 10; spring seat 11; mounting post 12; baffle 13; locking protrusion 14; gear groove 15; clearance groove 16. Detailed Implementation

[0029] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0031] In the description of this utility model, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] The specific implementation of this utility model is as follows:

[0033] like Figure 1-3As shown, this utility model provides a control mechanism for armrest rotation, including a base 1, a rotating assembly 2, and a control component 3. The base 1 is configured as the main support, the rotating assembly 2 is rotatably mounted on the base 1, and the control component 3 is slidably mounted in the rotating assembly 2 and rotates together with the rotating assembly 2. The base 1 includes a first locking part 4 located inside the rotating assembly 2, and the control component 3 includes a second locking part 5 located inside the rotating assembly 2 and beside the first locking part 4. The first locking part 4 and the second locking part 5 are selectively engaged and locked. An elastic reset member 6 is provided between either the rotating assembly 2 or the base 1 and the control component 3. The control mechanism includes a locked state and an adjustable state: in the locked state, the elastic reset member 6 provides elastic force to the control component 3 to engage the first locking part 4 and the second locking part 5; when switching from the locked state to the adjustable state, the control component 3 responds to the pressing pressure towards the rotating assembly 2 and drives the second locking part 5 to move together, so that the first locking part 4 and the second locking part 5 disengage; in the adjustable state, the rotating assembly 2 can rotate on the base 1.

[0034] The locking after rotation adjustment enables the rotating assembly 2 to provide stable support for the arm: the control component 3 is set in the rotating assembly 2, and the two rotate together on the base 1. Since the control component 3 and the rotating assembly 2 rotate synchronously, when the control component 3 is locked to the base 1, the control component 3 cannot continue to rotate, and the rotating assembly 2 can no longer rotate, thereby achieving structural locking and enabling the rotating assembly 2 to have sufficient support for the human arm.

[0035] Easy to switch between locked and unlocked states, convenient operation: The control element 3 is slidably mounted on the rotating assembly 2. The first locking part 4 and the second locking part 5 between the base 1 and the control element 3 can selectively engage and lock or disengage and unlock when the control element 3 slides. When the user presses the control element 3, the control element 3 slides to unlock and enter the adjustment state. When the user releases the control element 3, the elastic reset part 6 provides elastic force to the control element 3 to re-engage and lock the first locking part 4 and the second locking part 5, thus completing the switch to the locked state. The elastic reset part 6 can also keep the first locking part 4 and the second locking part 5 locked when the control element 3 is not under force.

[0036] Specifically, such as Figure 1 , 2As shown, the rotation axis of the rotating component 2 is oriented in the left-right direction. The rotating component 2 and the control component 3 can rotate back and forth on the base 1. The sliding direction of the control component 3 is the same as the axial direction of the rotation axis of the rotating component 2, that is, the sliding direction of the control component 3 in the rotating component 2 is in the left-right direction. The rotating component 2 and the control component 3 rotate together. The sliding of the control component 3 and its rotation with the rotating component 2 will not interfere with each other, but the sliding of the control component 3 will cause the state to switch. The rotating component 2 includes a plate base 21 and a support component 22 connected together. The plate base 21 is roughly a plate. The support component 22 is a soft pad for supporting the human arm. The support component 22 is located above the plate base 21 and is fixed to the plate base 21 by screws in the up-down direction. The control component 3 is set on the plate base 21 and located between the plate base 21 and the support component 22. The support component 22 can also prevent the control component 3 from detaching from the plate base 21.

[0037] like Figure 2 , 3 As shown in Figure 5, the control component 3 also includes a main body 31 and a button 32. The main body 31 has a frame structure. The button 32 is located at either end of the left or right side of the main body 31 and protrudes outward from the main body 31. The second locking part 5 is located at the other end of the main body 31. In this embodiment, the control mechanism is used in a seat. The button 32 is located on the side closer to the middle of the seat, that is, closer to the human body, which makes it more convenient for the user to press the button 32 directly with their thumb, which is ergonomic. Specifically, the main body 31 includes a first vertical rod 311, a second vertical rod 312, a first horizontal rod 313, and a second horizontal rod 314. The first vertical rod 311 and the second vertical rod 312 are both arranged in the front-back direction and are spaced apart from each other on the left and right. The first vertical rod 311 is located on the side closer to the middle of the seat. The button 32 protrudes from the first vertical rod 311 and protrudes outward from the rotating component 2. The button 32 responds to the pressure applied, causing the second locking part 5 to move. The button 32 protruding from the rotating assembly 2 makes it convenient for the user to press. The second locking part 5 is located on the second vertical rod 312. The first horizontal rod 313 and the second horizontal rod 314 are arranged in the left-right direction and are spaced apart from each other. The first horizontal rod 313 is located in front of the second horizontal rod 314, and its two ends are respectively connected to the front ends of the first vertical rod 311 and the second vertical rod 312. The two ends of the second horizontal rod 314 are respectively connected to the rear ends of the first vertical rod 311 and the second vertical rod 312. The control component 3 is integrally formed. The main body 31 is a rectangular frame. The button 32 and the second locking part 5 are both located on the frame-type main body 31. Therefore, the control component 3 moves together as a whole. When the button 32 is pushed, the main body 31 moves together, and the second locking part 5 on it also moves together. No other transmission structure or parts are required. The structure is simple and the cost is low.

[0038] According to the structure of the control component 3, the main body 31 of the rectangular frame fits the base 1 inside it. The second locking part 5 is located on the control component 3 at the end away from the button 32. The first locking part 4, located next to the second locking part 5, is located on the base 1 at the end away from the button 32, and the first locking part 4 is located between the second locking part 5 and the button 32. In the sliding direction of the control component 3, the second locking part 5 and the button 32 are located at the two ends of the control component 3, and the first locking part 4 is located between the second locking part 5 and the button 32. Due to this positional relationship, when the button 32 is pushed inward, the second locking part 5 can directly move away from the first locking part 4 to disengage from the lock.

[0039] Furthermore, such as Figure 2-4 As shown, the plate base 21 has a mounting part 7, and the control member 3 is disposed on the mounting part 7. The mounting part 7 includes a front baffle 71, a rear baffle 72, and a central boss 73. The central boss 73 is located between the front baffle 71 and the rear baffle 72. All three protrude upwards. A rotating groove 8 is formed in the middle of the central boss 73. The base 1 is located in the rotating groove 8. The plate base 21 and the base 1 are rotatably connected by an inserted rotating shaft. A sliding groove 9 is formed between the central boss 73 and the front baffle 71 and the rear baffle 72. The sliding groove 9 extends along the sliding direction of the control member 3. A first crossbar 313 is disposed between the front baffle 71 and the central boss 72. In the groove 9 between the protrusions 73, the second crossbar 314 is located in the groove 9 between the rear baffle 72 and the middle protrusion 73, and the length of the middle protrusion 73 in the left and right direction is less than the length of the first crossbar 313 and the second crossbar 314, so the control member 3 can slide through the groove 9; since the control member 3 is a frame structure, the groove 9 can be used to limit the control member 3 in the front and rear directions and provide sliding space; the support member 22 functions like a cover for the control member 3, giving the control member 3 a vertical limit and keeping the control member 3 on the mounting part 7 without detaching it.

[0040] Furthermore, the elastic reset member 6 is a spring, and the plate base 21 also has a spring receiving groove 10 on the side of the slide groove 9. The spring receiving groove 10 is parallel to the slide groove 9. The first longitudinal rod 311 of the main body 31 protrudes towards the base 1 with a spring seat 11. The spring is set in the spring receiving groove 10 and the two ends of the spring abut against the plate base 21 and the spring seat 11 respectively. Specifically, the spring receiving groove 10 is directly opened on the central protrusion 73. The spring receiving groove 10 does not penetrate the central protrusion 73 in the left and right direction, and the spring receiving groove 10 is open towards the button 32 and closed away from the button 32. The central protrusion 73 has a mounting post 12 for installing the spring protruding in the spring receiving groove 10. The spring seat 11 is also provided with a mounting post 12. The two ends of the spring are respectively sleeved on the two mounting posts 12. The axis of the mounting post 12 is in the left and right direction. The spring always gives the control member 3 elastic force so that the first locking part 4 and the second locking part 5 are inserted and locked.

[0041] like Figure 3-6 As shown, the upper end of the base 1 in the rotating groove 8 is a semi-cylinder. The second locking part 5 protrudes upward from the main body 31 on the second longitudinal rod 312 and is arc-shaped to adapt to the upper end of the base 1. The central protrusion 73 is provided with baffles 13 adapted to the shape of the base 1 on the left and right sides of the rotating groove 8. The semi-cylinder upper end of the base 1 allows the rotating assembly 2 to rotate smoothly on the base 1. The second locking part 5 is arc-shaped to adapt to the shape of the upper end of the base 1 so that it can continue to lock with the first locking part 4 on the base 1 after rotation.

[0042] A locking protrusion 14 and several shift grooves 15 are provided between the first locking part 4 and the second locking part 5. In this embodiment, there are three shift grooves 15, which are circumferentially distributed around the rotation axis of the rotating assembly 2. The shift grooves 15 are provided on one of the first locking part 4 or the second locking part 5, and the locking protrusion 14 is provided on the other of the first locking part 4 or the second locking part 5. In this embodiment, the shift grooves 15 are provided on the first locking part 4, and the locking protrusion 14 is provided on the second locking part 5. A baffle 13 between the first locking part 4 and the second locking part 5 is provided with... The avoidance groove 16 of the locking protrusion 14 is avoided; the control member 3 and the base 1 are locked by the insertion of the locking protrusion 14 into the position groove 15; the position groove 15 is configured to maintain the rotation angle of the rotating component 2 at the time when the locking protrusion 14 enters different locking grooves and switches to the locked state in the adjustment state; the first locking part 4 and the second locking part 5 are locked by the insertion of the locking protrusion 14 into the position groove 15, and when the locking protrusion 14 is inserted into different position grooves 15, the rotating component 2 can be kept at different rotation angles to adaptively support different human arm postures.

Claims

1. A control mechanism for rotating a handrail, characterized in that: The device includes a base, a rotating assembly, and a control component. The base serves as the main support, the rotating assembly is rotatably mounted on the base, and the control component is slidably mounted within the rotating assembly and rotates with it. The base includes a first locking part located inside the rotating assembly, and the control component includes a second locking part located inside the rotating assembly and beside the first locking part. The first and second locking parts are selectively engaged and locked. An elastic reset element is provided between either the rotating assembly or the base and the control component. The control mechanism includes a locked state and an adjustable state: in the locked state, the elastic reset element applies a spring force to the control component to engage the first and second locking parts; when switching from the locked state to the adjustable state, the control component responds to a pressing force towards the rotating assembly, causing the second locking part to move together, thereby disengaging the first and second locking parts; in the adjustable state, the rotating assembly can rotate on the base.

2. The control mechanism for armrest rotation according to claim 1, characterized in that: The control also includes a button that protrudes from the rotating assembly and moves the second locking part in response to pressure.

3. The control mechanism for armrest rotation according to claim 2, characterized in that: The second locking part is located on the control member at the end furthest from the button, and the first locking part is located on the base at the end furthest from the button, with the first locking part located between the second locking part and the button.

4. The control mechanism for armrest rotation according to claim 3, characterized in that: The control component includes a main body, which is a frame structure, and the base is fitted inside the main body. The button is located at either end of the left or right side of the main body and protrudes outward from the main body. The second locking part is located at the other end of the main body. The button and the second locking part are located on both sides of the base, respectively.

5. The control mechanism for armrest rotation according to claim 4, characterized in that: The upper part of the base is semi-cylindrical, and the second locking part protrudes upward from the main body and is arc-shaped to fit the upper part of the base.

6. The control mechanism for armrest rotation according to claim 4, characterized in that: The rotating assembly includes a plate base connected one above the other and a support member. The support member is located above the plate base, and the control member is set on the plate base. The support member is configured to support the human arm and prevent the control member from detaching from the plate base. A sliding groove is provided on the plate base, which extends along the sliding direction of the control member. The control member is set in the sliding groove and slides in the sliding groove.

7. The control mechanism for armrest rotation according to claim 6, characterized in that: The elastic reset element is a spring. The plate base also has a spring receiving groove on the side of the slide groove. The spring receiving groove is parallel to the slide groove. The end of the main body with the button protrudes towards the base and has a spring seat. The spring is set in the spring receiving groove and the two ends of the spring abut against the plate base and the spring seat respectively.

8. The control mechanism for armrest rotation according to claim 7, characterized in that: The plate base has a mounting post protruding from the spring receiving groove for mounting the spring, and the spring seat also has a mounting post, with the two ends of the spring respectively sleeved on the two mounting posts.

9. The control mechanism for armrest rotation according to claim 1, characterized in that: A locking protrusion and several position slots are provided between the first locking part and the second locking part. The position slots are circumferentially distributed around the rotation axis of the rotating assembly. The position slots are provided on one of the first locking part or the second locking part, and the locking protrusion is provided on the other of the first locking part or the second locking part. The control member and the base are locked by the insertion of the position slots and the locking protrusions. The position slots are configured such that when the locking protrusion enters different locking slots and switches to the locking state in the adjustment state, the rotation angle of the rotating assembly is maintained at this time.

10. The control mechanism for armrest rotation according to claim 1, characterized in that: The sliding direction of the control component is the same as the axial direction of the rotation axis of the rotating assembly.

Images