State switching assembly and lifting handrail

Abstract

The utility model discloses a state switching assembly and a lifting handrail. The state switching assembly comprises a control piece, an elastic piece, a locking part and a locking piece. The locking piece can slide in the direction towards the locking part and is selectively locked with the locking part; the elastic piece is arranged between the locking piece and the locking part and always provides elastic force for keeping the locking piece away from the locking part; the control piece is in running fit with the locking piece and is provided with a pushing part corresponding to the groove in the locking piece; the control piece rotates to change the position relation between the propelling part and the groove, then the locking piece is driven to move, separation or locking of the locking piece and the locking part is achieved, and state switching is completed. Rotation of the control piece and movement of the locking piece of the assembly are not in the same plane, different from the prior art, the assembly has few parts, interference and failure conditions are greatly reduced, working stability is high, and the assembly can be kept stable, efficient and reliable in a specific state; the lifting handrail comprises a handrail frame, a lifting seat and the assembly, switching between the adjusting state and the locking state is achieved through the assembly, and the lifting seat can be kept stable after the height is adjusted.

Description

Technical Field

[0001] This utility model relates to the field of furniture, and in particular to a state switching component and a lifting armrest. Background Technology

[0002] In today's society, as people's quality of life continues to improve, their expectations for various types of furniture are no longer limited to basic functionality, but rather they pursue higher quality and a more diverse experience.

[0003] Specifically, people have increasingly demanding requirements for various types of furniture, expecting them to have sufficient mobility to suit different scenarios and personal preferences. In this process, the movable parts of the furniture not only need to be able to be adjusted flexibly, but also need to remain stable in specific states, which urgently requires an efficient and reliable state-switching component.

[0004] Taking common chair armrests as an example, traditional chair armrests often have a single function and cannot meet the diverse needs of users in different situations. For example, in an office setting, people sometimes need to adjust the armrests to a specific height to provide comfortable support when typing or writing for extended periods; while when resting and relaxing, they want the armrests to be able to flexibly change angles to provide a more comfortable posture. However, existing chair armrests cannot simultaneously achieve both ease of adjustment and stability in maintaining the correct position, thus limiting the overall functionality and user experience of the chair. Summary of the Invention

[0005] To address the aforementioned technical problems, this utility model provides a state switching component, including a control component, an elastic component, a locking part, and a locking element. The locking element can slide along the direction towards the locking part and selectively locks with the locking part. The elastic component is placed between the two, always providing a spring force to keep the locking element away from the locking part. The control component rotates with the locking element and is provided with a pushing part corresponding to a groove on the locking element. The rotation of the control component changes the positional relationship between the pushing part and the groove, thereby driving the locking element to move, realizing the separation or locking of the locking element and the locking part, and completing the state switching. In this component, the rotation of the control component and the movement of the locking element are not on the same plane, which is different from the prior art. It also has fewer parts, greatly reducing interference and failure, and has strong working stability. Its structure is simple and compact, ingeniously designed, and can maintain stability in a specific state, making it highly efficient and reliable.

[0006] Furthermore, a lifting handrail is provided, including a handrail frame, a lifting seat, and the aforementioned state switching component. The state switching component enables the switching between the adjustment state and the locking state, allowing the lifting seat to remain stable after the height is adjusted.

[0007] The technical solution of this utility model is implemented as follows:

[0008] A state switching component includes a control member, an elastic member, a locking part, and a locking member. The locking member is slidably disposed in a direction toward the locking part, and selectively locks onto the locking part. The elastic member is disposed between the locking part and the locking member and configured to always provide a spring force to the locking member to slide away from the locking part. The control member is rotatably engaged with the locking member. The control member has at least one pushing part that protrudes from the surface of the control member toward the locking member and has a pushing height in the sliding direction of the locking member. The locking member has at least one groove corresponding to the pushing part. When the control member rotates to the point where the pushing part is in the groove, the locking member moves away from the locking part under the action of the elastic member. When the control member rotates to the point where the pushing part moves away from the groove, the pushing part overcomes the spring force of the elastic member and pushes the locking member to slide toward the locking part. The sliding distance of the locking member is the pushing height, and the locking part and the locking member are locked together.

[0009] In this solution, the separation or locking of the locking element and the locking part determines different states. The state switching is achieved by driving the movement of the locking element through the action of the control element and the elastic element. Furthermore, the action of the control element on the locking element is determined by the relative positional relationship between the pushing part and the groove. The different positional relationships between the pushing part and the groove are achieved by the rotation of the control element. The rotation of the control element and the movement of the locking element are not in the same plane, which is different from the mechanism in the prior art where the state switching is achieved by the movement of parts in the same plane. In addition, this solution requires fewer parts, greatly reducing the possibility of interference or failure, and making the operation more stable. This state switching component has a simple and compact structure, ingenious design, can remain stable under specific conditions, and is highly efficient and reliable.

[0010] Preferably, the control member's rotation axis is arranged along the sliding direction of the locking member, and the propulsion part is located on the end face of the control member facing the locking member. The rotation direction of the control member and the sliding direction of the locking member are not in the same plane, allowing for more diverse configurations of the operating components used to drive the control member's movement.

[0011] Preferably, there are at least two propulsion parts, which are evenly arranged circumferentially along the control element; the number of grooves on the locking element is the same as that of the propulsion parts, and the grooves are evenly arranged circumferentially. The number of propulsion parts and grooves, as well as their even arrangement, can improve the stability of the locking fit between the locking element and the locking part.

[0012] Preferably, the control component is disc-shaped, and the locking component has a receiving groove on its end face near the control component. The control component is rotatably disposed in the receiving groove, and the groove is disposed in the receiving groove. The control component being disposed in the receiving groove of the locking component makes the structure more compact, and the disc-shaped control component also facilitates the rotation of the control component in the receiving groove.

[0013] Preferably, the locking member has a first locking tooth on its end face near the locking part, and the locking part has a plurality of second locking teeth, which are distributed perpendicular to the sliding direction of the locking member. When the pushing part pushes the locking member forward a certain height, the first locking tooth engages with the second locking tooth, and the locking part and the locking member are locked together. The locking member and the locking part are locked by the engagement of the locking teeth.

[0014] Preferably, the locking component has a plurality of the aforementioned first locking teeth, which are distributed perpendicular to the sliding direction of the locking component. A large number of first locking teeth makes the engagement of the locking teeth more secure and stable; furthermore, using smaller locking teeth can achieve a near-stepless adjustment feel.

[0015] Preferably, the locking member has two rows of first teeth spaced apart, and the locking part has two rows of second teeth spaced apart accordingly. A first clearance space is formed between the two rows of first teeth, and a second clearance space is formed between the two rows of second teeth. The elastic element is disposed in the first clearance space and the second clearance space. The elastic element is cleverly designed, coexisting with the teeth after avoiding them, and further making the structure more compact.

[0016] Preferably, the propulsion section has two first inclined surfaces, which are located on both sides of the propulsion section along the rotation direction of the control member. That is, the propulsion section is in the shape of a boss, and the first inclined surfaces facilitate the propulsion section to move in and out of the groove when the control member rotates.

[0017] Preferably, the groove has two second inclined surfaces that mate with the first inclined surface. The mate between the first and second inclined surfaces is more conducive to the entry and exit of the propulsion part from the groove.

[0018] Preferably, the width of the propulsion section gradually increases from the top to the bottom. That is, the propulsion section is in the shape of a boss.

[0019] Preferably, the locking member and the locking part are spaced apart by the elastic member, and the advancing height is not less than this distance. The advancing height is sufficient to ensure a firm and stable fit between the locking member and the locking part. Due to their size, they are interference-fitted when locked, so there will be no shaking in any direction.

[0020] Preferably, the elastic element is a spring sheet. The spring sheet is bent and abuts against the locking part and the locking member respectively, so as to cause the locking member to move away from the locking part.

[0021] Preferably, the elastic element is a spring.

[0022] A lifting handrail includes a handrail frame, a lifting seat, and a state switching component as described above. The handrail frame is configured as a main support, and the lifting seat is configured as a support for connecting the handrail. The lifting seat is slidably mounted on the handrail frame along the height direction. The locking part is disposed on one of the handrail frame or the lifting seat, and the locking member is slidably disposed on the other, with the sliding direction of the locking member perpendicular to the sliding direction of the lifting seat. The lifting handrail has an adjustable state and a locked state. In the adjustable state, the pushing part is located in a groove, and the locking member moves away from the locking part under the action of an elastic member, allowing the lifting seat to slide on the handrail frame. In the locked state, the pushing part moves away from the groove, and the pushing part pushes the locking member to lock into the locking part, thus locking the lifting seat and the handrail frame.

[0023] The aforementioned state switching component is applied to the handrail to realize the lifting function of the handrail, and to give the lifting handrail an adjustment state and a locking state. In the adjustment state, the height of the lifting seat can be adjusted arbitrarily. After the adjustment is completed, it switches to the locking state to maintain the current height.

[0024] Preferably, an operating component is rotatably mounted on the handrail or lifting platform, and the operating component and locking component are mounted on the same part of the lifting platform or handrail; the operating component and control component are linked and configured so that the rotation of the operating component drives the rotation of the control component. The operating component is used to drive the rotation of the control component, and the operating component and locking component need to be mounted on the same part.

[0025] Preferably, the locking part is disposed on the lifting seat and integrally formed with the lifting seat.

[0026] Preferably, the lifting platform has an installation space, and the locking part is located in the installation space. The locking component, control component, and lifting platform are all located in the installation space, and the locking component, control component, and lifting platform are arranged sequentially from the nearest to the locking part. This arrangement ensures smooth functionality and a more compact structure.

[0027] Preferably, the handrail is equipped with a rotating operating component, which includes a shaft and a knob. The knob is located on the side of the lifting seat away from the handrail and protrudes from the lifting seat. The shaft is inserted into the lifting seat, locking component, and control component and is rotatably connected to the handrail. The shaft rotates in conjunction with the lifting seat and locking component, and is linked with the control component. The knob protrudes from the lifting seat for easy operation by the user. The shaft passes through the lifting seat, locking component, and control component and is rotatably connected to the handrail, which is ingenious in integrating the locking component and control component, driving the control component to rotate while also guiding the sliding of the locking component.

[0028] Preferably, the lifting base has a clearance groove that extends along the height direction, through which the shaft enters the installation space. During lifting, the lifting base avoids the shaft by passing through the clearance groove.

[0029] As a preferred option, the lifting seat is also equipped with a decorative cover, which is located on the outside of the handrail frame and encloses the installation space.

[0030] Preferably, the handrail or lifting seat is provided with two spaced and parallel sliding shafts, which are arranged along the sliding direction of the locking member; the locking member is slidably arranged on the sliding shaft.

[0031] The design starting point, concept, and beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0032] In this design, the separation or locking of the locking element and the locking part determines different states. The switching of states is achieved by driving the movement of the locking element through the action of the control element and the elastic element. Furthermore, the action of the control element on the locking element is determined by the relative positional relationship between the pushing part and the groove, and the different positional relationships between the pushing part and the groove are achieved by the rotation of the control element. The rotation of the control element and the movement of the locking element are not in the same plane, unlike existing mechanisms where state switching is achieved by the movement of components in the same plane. In addition, this design requires fewer parts, greatly reducing the possibility of interference or failure, and resulting in stronger operational stability. This state switching component has a simple and compact structure, is ingeniously designed, maintains stability under specific conditions, and is highly efficient and reliable. The lifting handrail uses this state switching component to switch between adjustment and locking states, allowing the lifting seat to remain stable after height adjustment, thus realizing the lifting function of the handrail. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of the lifting handrail in an embodiment of the present invention;

[0034] Figure 2 The explosion of the state switching component and lifting handrail in the embodiments of this utility model. Figure 1 ;

[0035] Figure 3 The explosion of the state switching component and lifting handrail in the embodiments of this utility model. Figure 2 ;

[0036] Figure 4 This is a three-dimensional structural diagram of the lifting seat and locking part in an embodiment of the present invention;

[0037] Figure 5 This is a three-dimensional structural diagram of the locking element in the embodiments of this utility model. Figure 1 ;

[0038] Figure 6 This is a three-dimensional structural diagram of the control component in the embodiment of the present invention;

[0039] Figure 7 This is a three-dimensional structural diagram of the locking element in the embodiments of this utility model. Figure 2;

[0040] Figure 8 This is a cross-sectional view of the state switching component and the lifting handrail in the locked state of this utility model in an embodiment;

[0041] Figure 9 This is a cross-sectional view of the state switching component and the lifting handrail in the adjustable state of the present invention in an embodiment;

[0042] Figure 10 This is a three-dimensional structural diagram of the locking member and the control member in the locked state in an embodiment of the present invention;

[0043] Figure 11 This is a three-dimensional structural diagram of the locking and control components in the adjusted state of this utility model in an embodiment.

[0044] The reference numerals in the attached drawings are as follows: control element 1; propulsion part 11; first inclined surface 111; locking part 2; second locking tooth 21; second clearance space 22; locking element 3; groove 31; second inclined surface 311; first locking tooth 32; first clearance space 33; receiving groove 34; handrail frame 4; sliding shaft 41; lifting seat 5; installation space 51; clearance groove 52; decorative cover 6; operating element 7; knob 71; shaft 72; elastic element 10. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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.

[0048] The specific implementation of this utility model is as follows:

[0049] like Figure 2-9As shown, this utility model provides a state switching component, including a control member 1, an elastic member 10, a locking part 2, and a locking member 3. The locking member 3 is slidably disposed in the direction toward the locking part 2, and the locking member 3 and the locking part 2 are selectively locked together. The elastic member 10 is disposed between the locking part 2 and the locking member 3 and is configured to always provide the locking member 3 with a spring force that moves it away from the locking part 2. The control member 1 and the locking member 3 are rotatably engaged. The control member 1 is provided with at least one pushing part 11, which protrudes from the surface of the control member 1 toward the locking member 3 and has a pushing height in the sliding direction of the locking member 3. The locking member 3 is provided with at least one groove 31 corresponding to the pushing part 11. When the control member 1 rotates to the point where the pushing part 11 is located in the groove 31, the locking member 3 leaves the locking part 2 under the action of the elastic member 10. When the control member 1 rotates to the point where the pushing part 11 leaves the groove 31, the pushing part 11 overcomes the spring force of the elastic member 10 and pushes the locking member 3 to slide toward the locking part 2. The sliding distance of the locking member 3 is the pushing height, and the locking part 2 and the locking member 3 are locked together.

[0050] In this design, the separation or locking of the locking element 3 and the locking part 2 determines different states. The state switching is achieved by driving the movement of the locking element 3 through the action of the control element 1 and the elastic element 10. Furthermore, the action of the control element 1 on the locking element 3 is determined by the relative positional relationship between the pushing part 11 and the groove 31. The different positional relationships between the pushing part 11 and the groove 31 are achieved by the rotation of the control element 1. The rotation of the control element 1 and the movement of the locking element 3 are not in the same plane, which is different from the mechanism in the prior art where the state switching is achieved by the movement of components in the same plane. In addition, this design requires fewer parts, greatly reducing the possibility of interference or failure, and making the operation more stable. This state switching component has a simple and compact structure, is ingeniously designed, can remain stable under specific conditions, and is highly efficient and reliable.

[0051] Furthermore, the advancing height is the distance from the top surface of the advancing part 11 to the bottom surface of the advancing part 11 or the end face of the control member 1, that is, the height of the protrusion of the advancing part 11. When the locking member 3 and the locking part 2 are separated, the locking member 3 and the locking part 2 are separated by the elastic member 10 and have a gap. The advancing height is not less than the gap. Under the influence of machining accuracy, it is difficult to achieve an advancing height equal to the gap so that the locking member 3 and the locking part 2 are completely locked. Therefore, in this embodiment, considering the actual situation, the advancing height is slightly greater than the gap to ensure a firm and stable fit between the locking member 3 and the locking part 2. The two are interference-fitted due to their size when locked, so there will be no shaking in any direction.

[0052] Regarding the structure of control element 1, locking element 3, and locking part 2, specifically, as follows: Figure 2 , 3As shown in Figure 5-11, the control element 1 is disc-shaped, and its rotation axis is arranged along the sliding direction of the locking element 3. The propulsion part 11 is located on the end face of the control element 1 facing the locking element 3. The rotation direction of the control element 1 and the sliding direction of the locking element 3 are not in the same plane, allowing for more diverse configurations of the operating element 7 used to drive the movement of the control element 1. There are at least two propulsion parts 11, and multiple propulsion parts 11 are evenly arranged circumferentially. The number of grooves 31 on the locking element 3 is the same as that of the propulsion parts 11, and multiple grooves 31 are evenly arranged circumferentially. The number and even arrangement of the propulsion parts 11 and grooves 31 can improve the locking effect between the locking element 3 and the locking part 2. To ensure the stability of the fit, in this embodiment, there are three propulsion parts 11 and three grooves 31. The distance between every two propulsion parts 11 is 60°, and the span of each propulsion part 11 is also 60°. Correspondingly, grooves 31 are also provided. Furthermore, in order to make the structure more compact and the operation more stable, a circular receiving groove 34 is provided on the end face of the locking member 3 near the control member 1. The control member 1 is rotatably disposed in the receiving groove 34, and the groove 31 is disposed in the receiving groove 34. The control member 1 is disposed in the receiving groove 34 of the locking member 3, which makes the structure more compact. The disc-shaped control member 1 also facilitates the rotation of the control member 1 in the receiving groove 34.

[0053] To make the rotation of the control element 1 easier, the propulsion part 11 is in the shape of a boss, and the width of the propulsion part 11 gradually increases from the top to the bottom. Moreover, the propulsion part 11 has two first inclined surfaces 111. Along the rotation direction of the control element 1, the two first inclined surfaces 111 are located on both sides of the propulsion part 11. At the same time, the groove 31 has two second inclined surfaces 311 that cooperate with the first inclined surfaces 111. The cooperation of the first and second inclined surfaces is more conducive to the propulsion part 11 entering and exiting the groove 31.

[0054] To be more specific, such as Figure 2-4As shown in Figures 9 and 10, the locking member 3 has a first locking tooth 32 on its end face near the locking part 2, and the locking part 2 has a plurality of second locking teeth 21, which are distributed perpendicular to the sliding direction of the locking member 3. When the pushing part 11 pushes the locking member 3 forward a certain distance, the first locking tooth 32 engages with the second locking tooth 21, and the locking part 2 and the locking member 3 are locked together. The locking member 3 has a plurality of the aforementioned first locking teeth 32, which are distributed perpendicular to the sliding direction of the locking member 3. The large number of first locking teeth 32 makes the engagement of the locking teeth more secure and stable. The first step uses smaller locking teeth, which can also approach the feeling of stepless adjustment; furthermore, the locking member 3 has two rows of first locking teeth 32 distributed at intervals, and the locking part 2 has two rows of second locking teeth 21 distributed at corresponding intervals. A first clearance space 33 is formed between the two rows of first locking teeth 32, and a second clearance space 22 is formed between the two rows of second locking teeth 21. The elastic member 10 is set in the first clearance space 33 and the second clearance space 22. The first locking teeth 32, the second locking teeth 21 and the elastic member 10 are arranged very cleverly. The elastic member 10 avoids the locking teeth and coexists with the locking teeth, which further makes the structure more compact.

[0055] Furthermore, the elastic element 10 can be a sheet or a spring; in this embodiment, a sheet is selected, which is bent and abuts against the locking part 2 and the locking element 3 respectively, so that the locking element 3 moves away from the locking part 2.

[0056] This state switching component can be used on movable parts of different furniture. In this embodiment, a lifting armrest is used as an example. Figure 1-3 As shown in Figures 8-11, a lifting handrail includes a handrail frame 4, a lifting seat 5, and a state switching component as described above. The handrail frame 4 is configured as a main support, and the lifting seat 5 is configured as a support for connecting the handrail. The lifting seat 5 is slidably disposed on the handrail frame 4 along the height direction. The locking part 2 is disposed on one of the handrail frame 4 or the lifting seat 5, and the locking member 3 is slidably disposed on the other, with the sliding direction of the locking member 3 perpendicular to the sliding direction of the lifting seat 5. The lifting handrail has an adjustment state and a locking state. In the adjustment state, the pushing part 11 is located in the groove 31, and the locking member 3 leaves the locking part 2 under the action of the elastic member 10, allowing the lifting seat 5 to slide on the handrail frame 4. In the locking state, the pushing part 11 leaves the groove 31, and the pushing part 11 pushes the locking member 3 to lock with the locking part 2, thus locking the lifting seat 5 to the handrail frame 4. The state switching component is applied to the handrail to realize the lifting function of the handrail and to allow the lifting handrail to have an adjustment state and a locking state. In the adjustment state, the height of the lifting seat 5 can be adjusted arbitrarily, and after adjustment, it switches to the locking state to maintain the current height.

[0057] Specifically, the locking part 2 is installed on the lifting seat 5 and integrally formed with the lifting seat 5. The handrail frame 4 is provided with two spaced and parallel sliding shafts 41, which are arranged along the sliding direction of the locking part 3. The locking part 3 is slidably installed on the sliding shafts 41, and the control part 1 is rotatably installed between the locking part 3 and the handrail frame 4. An operating part 7 is also rotatably installed on the handrail frame 4 or the lifting seat 5. The operating part 7 and the locking part 3 are installed on the same side of the lifting seat 5 or the handrail frame 4, that is, the operating part 7 is rotatably installed on the handrail frame 4. The operating part 7 and the control part 1 are linked and configured so that when the operating part 7 rotates, it drives the control part 1 to rotate.

[0058] Furthermore, the handrail frame 4 is a bent plate, and the lifting seat 5 is a shell with an installation space 51. The locking part 2 is located in the installation space 51. The locking element 3, the control element 1, and the lifting seat 5 are all located in the installation space 51, and the locking element 3, the control element 1, and the lifting seat 5 are arranged from near to far from the locking part 2. This arrangement ensures smooth functionality and a more compact structure. The operating element 7 includes a shaft 72 and a knob 71, which are fixedly connected and can rotate synchronously. The knob 71 is located on the side of the lifting seat 5 away from the handrail and protrudes from the lifting seat 5. The shaft 72 is inserted into the lifting seat 5, the locking element 3, and the control element 1 and is rotatably connected to the handrail frame 4. The shaft 72 rotatably engages with the lifting seat 5 and the locking element 3, and is linked with the control element 1. The knob 71 protrudes from the lifting seat 5 for easy operation by the user. The shaft 72 passes through the lifting seat 5, the locking element 3, and the control element 1 and is rotatably connected to the handrail frame 4. The design cleverly integrates locking element 3 and control element 1, allowing control element 1 to rotate while guiding the sliding of locking element 3. A flat surface is provided on shaft 72; the hole through which shaft 72 passes in locking element 3 is circular, while the hole through which shaft 72 passes in control element 1 has a corresponding flat surface. This allows shaft 72 to rotate relative to locking element 3 while simultaneously driving control element 1 to rotate. After the end of shaft 72 is inserted into handrail frame 4, it is connected to handrail frame 4 via a screw and washer assembly, enabling rotational connection between shaft 72 and handrail frame 4. A clearance groove 52 is provided on lifting seat 5, extending along the height direction. Shaft 72 enters installation space 51 through clearance groove 52. Clearance groove 52 aligns with two clearance spaces between two sets of locking teeth. After passing through clearance groove 52, shaft 72 first connects to elastic element 10, which is directly fitted onto shaft 72, ensuring that elastic element 10 remains unchanged in height relative to locking element 3 and control element 1. The lifting seat 5 is also equipped with a decorative cover 6, which is located on the outside of the handrail frame 4 and encloses the installation space 51.

Claims

1. A state switching component, characterized in that: The device includes a control element, an elastic element, a locking part, and a locking member. The locking member is slidably disposed in the direction toward the locking part, and selectively locks onto the locking part. The elastic element is disposed between the locking part and the locking member and configured to always provide a spring force to the locking member to slide away from the locking part. The control element and the locking member are rotatably engaged. The control element has at least one pushing part that protrudes from the surface of the control element toward the locking member and has a pushing height in the sliding direction of the locking member. The locking member has at least one groove corresponding to the pushing part. When the control element rotates to the point where the pushing part is in the groove, the locking member moves away from the locking part under the action of the elastic element. When the control element rotates to the point where the pushing part moves away from the groove, the pushing part overcomes the spring force of the elastic element and pushes the locking member to slide toward the locking part. The sliding distance of the locking member is the pushing height, and the locking part and the locking member are locked together.

2. The state switching component according to claim 1, characterized in that: The control component's rotating shaft is positioned along the sliding direction of the locking component, and the propulsion part is located on the end face of the control component facing the locking component.

3. The state switching component according to claim 1, characterized in that: There are at least two propulsion units, and multiple propulsion units are evenly arranged around the circumference of the control unit; the number of grooves on the locking unit is the same as that of the propulsion units, and multiple grooves are evenly arranged around the circumference.

4. The state switching component according to claim 1, characterized in that: The control component is disc-shaped, and the locking component has a receiving groove on its end face near the control component. The control component is rotatably disposed in the receiving groove, and the groove is disposed in the receiving groove.

5. The state switching component according to claim 1, characterized in that: The locking member has a first locking tooth on its end face near the locking part, and the locking part has a number of second locking teeth, which are distributed perpendicular to the sliding direction of the locking member. When the pushing part pushes the locking member forward a certain height, the first locking tooth engages with the second locking tooth, and the locking part locks with the locking member.

6. The state switching component according to claim 5, characterized in that: The locking component has a plurality of first locking teeth, which are distributed perpendicular to the sliding direction of the locking component.

7. The state switching component according to claim 6, characterized in that: The locking member has two rows of first teeth spaced apart, and the locking part has two rows of second teeth spaced apart accordingly. A first clearance space is formed between the two rows of first teeth, and a second clearance space is formed between the two rows of second teeth. The elastic member is disposed in the first clearance space and the second clearance space.

8. The state switching component according to claim 1, characterized in that: The propulsion section has two first inclined surfaces, which are located on both sides of the propulsion section along the rotation direction of the control component.

9. The state switching component according to claim 8, characterized in that: The groove has two second inclined surfaces that mate with the first inclined surface.

10. The state switching component according to claim 1, characterized in that: The width of the propulsion section gradually increases from top to bottom.

11. The state switching component according to claim 1, characterized in that: The locking member and the locking part are separated by a gap under the action of the elastic member, and the advancing height is not less than this gap.

12. The state switching component according to claim 1, characterized in that: The elastic element is a spring sheet.

13. The state switching component according to claim 1, characterized in that: The elastic element is a spring.

14. A lifting handrail, characterized in that: The device includes a handrail frame, a lifting seat, and a state switching component as described in any one of claims 1-13; the handrail frame is configured as a main support, the lifting seat is configured as a support for connecting the handrail, and the lifting seat is slidably mounted on the handrail frame along the height direction; the locking part is disposed on one of the handrail frame or the lifting seat, and the locking member is slidably disposed on the other, with the sliding direction of the locking member perpendicular to the sliding direction of the lifting seat; the lifting handrail has an adjustable state and a locked state; in the adjustable state, the pushing part is located in the groove, the locking member is disengaged from the locking part under the action of the elastic member, and the lifting seat can slide on the handrail frame; In the locked state, the pusher part leaves the groove, pushes the locking part to engage with the locking part, and locks the lifting seat and handrail.

15. The lifting handrail according to claim 14, characterized in that: An operating component is also rotatably mounted on the handrail or lifting platform, and the operating component and the locking component are mounted on the same platform as the lifting platform or handrail; the operating component and the control component are linked and configured so that the rotation of the operating component drives the rotation of the control component.

16. The lifting handrail according to claim 14, characterized in that: The locking part is located on the lifting seat and is integrally formed with the lifting seat.

17. The lifting handrail according to claim 16, characterized in that: The lifting platform has an installation space, and the locking part is located in the installation space. The locking component, control component, and lifting platform are all installed in the installation space, and the locking component, control component, and lifting platform are arranged from near to far from the locking part.

18. The lifting handrail according to claim 17, characterized in that: An operating component is rotatably mounted on the handrail. The operating component includes a shaft and a knob. The knob is located on the side of the lifting seat away from the handrail and protrudes from the lifting seat. The shaft is inserted into the lifting seat, locking component, and control component and is rotatably connected to the handrail. The shaft is rotatably engaged with the lifting seat and locking component, and the shaft is linked with the control component.

19. The lifting handrail according to claim 18, characterized in that: The lifting platform has a clearance groove that extends along the height direction, and the shaft enters the installation space from the clearance groove.

20. The lifting handrail according to claim 17, characterized in that: The lifting platform is also equipped with a decorative cover, which is located on the outside of the handrail frame and encloses the installation space.

21. The lifting handrail according to claim 14, characterized in that: The handrail or lifting seat is provided with two spaced and parallel sliding shafts, which are arranged along the sliding direction of the locking element; the locking element is slidably arranged on the sliding shaft.

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