Recliner, seat and method for adjusting a seat armrest

Abstract

The application provides an angle adjuster, a seat and a seat armrest adjusting method. The angle adjuster comprises a fixed part, a rotating part rotatably connected to the fixed part, and a reversing assembly for switching the angle adjuster to work in a first state or a second state, which comprises a cam, a locking piece and a first elastic piece. The cam is provided with a protruding part and rotates under the drive of the rotating part. The locking piece comprises a driven block capable of abutting against the protruding part and is rotatably connected to the fixed part. The first elastic piece presses the locking piece towards the cam. In the first state, the driven block is separated from the protruding part, and the locking piece locks the rotating part, so that the rotating part can only provide rotation in a forward direction and can be locked at any angle. In the second state, the driven block abuts against the protruding part, and the locking piece is unlocked with the rotating part, so that the rotating part can provide rotation in a reverse direction.

Description

Technical Field

[0001] This application relates to an adjuster, a seat, and a method for adjusting the seat armrests. Background Technology

[0002] Today, people are increasingly focused on meeting their individual needs. Take chair armrests as an example: different people have different body types and usage habits, resulting in different requirements for the tilt angle of the armrests. While typical ratchet and pawl adjusters only offer stepped adjustment, stepless adjusters that can lock at any angle within their adjustment range offer higher precision, better meet individual user needs, and provide a more comfortable user experience.

[0003] Therefore, there is a need in this field to continue developing steplessly adjustable angle adjusters. Summary of the Invention

[0004] The purpose of this application is to provide an angle adjuster.

[0005] Another objective of this application is to provide a seat.

[0006] Another objective of this application is to provide a method for adjusting a seat armrest.

[0007] An angle adjuster according to one aspect of this application is used to adjust the rotation angle of a second object relative to a first object, comprising: a fixed part fixedly connected to the first object; a rotating part fixedly connected to the second object and rotatably connected to the fixed part; a reversing assembly for switching the angle adjuster to operate in a first state or a second state, comprising a cam, a locking member, and a first elastic member; the cam has a protrusion and rotates under the drive of the rotating part; the locking member includes a driven block capable of abutting the protrusion and rotatably connected to the fixed part; the first elastic member presses the locking member toward the cam; in the first state, the driven block disengages from the protrusion, and the locking member locks the rotating part, such that the rotating part can only provide rotation in the positive direction and can be locked at any angle; in the second state, the driven block abuts the protrusion, and the locking member is unlocked from the rotating part, such that the rotating part can provide rotation in the opposite direction.

[0008] It is understood that angle adjusters typically have angle adjustment and return-to-position functions, requiring switching between two working states. When the angle adjuster operates in the first state, the rotating part can rotate forward to any angle and lock, thus providing stepless adjustment and higher adjustment precision compared to angle adjusters with stepped adjustment. When the angle adjuster operates in the second state, the rotating part can rotate in the reverse direction, achieving a return-to-position function. Compared to existing steplessly adjustable angle adjusters, using the reversing component to switch the angle adjuster between the first and second states simplifies the overall structure, ensures stable and reliable function, facilitates manufacturing, and reduces costs.

[0009] In one or more embodiments, in the second state, the rotating part is also capable of providing rotation in the positive direction.

[0010] In one or more embodiments, the fixing part is provided with a limiting block to limit the stroke of the rotating part in the second state in the forward direction.

[0011] In one or more embodiments, the rotating part includes: a first rotating shaft; a first rotating member having a first wall surface on one side of its inner periphery and a locking groove on one side of its outer periphery for cooperating with the locking member; a second rotating member having a plurality of second walls and a plurality of third walls on one side of its outer periphery; a plurality of rolling members; and a plurality of second elastic members; wherein the first rotating member is rotatably connected to the fixed part about the first rotating shaft; the cam and the second rotating member are fixedly connected to the first rotating shaft; the first wall surface and the plurality of second walls and the plurality of third walls together define a plurality of accommodating spaces, one rolling member and one second elastic member are disposed in one accommodating space, the second wall surface has a slope so that the gap between it and the first wall surface on one side has a size smaller than the diameter of the rolling member, and the two ends of the second elastic member are respectively connected to the rolling member and the third wall surface, so that the rolling member abuts against the slope.

[0012] In one or more embodiments, the locking member engages with the locking groove to lock the first rotating member and restrict the second rotating member to rotate only in the forward direction; the locking member separates from the locking groove to allow the first rotating member to rotate and the second rotating member to rotate in either the forward or reverse direction.

[0013] In one or more embodiments, the fixing part includes: a housing; an end cap fixedly connected to the housing; wherein the housing and the end cap together define a cavity for providing an installation position for the rotating part and the reversing assembly.

[0014] In one or more embodiments, the fixing part is provided with a washer that contacts the rotating part.

[0015] According to a second aspect of this application, a seat includes the angle adjuster described in the above embodiments, wherein the rotating part is fixedly connected to the armrest, and the fixing part is fixedly connected to the seat body.

[0016] According to a third aspect of this application, a method for adjusting a seat armrest is applicable to the seat described in the above embodiments, the adjustment method comprising:

[0017] Set the angle adjuster to the first state;

[0018] Drive the handrail to rotate in the positive direction to a desired angle between the first angle and the second angle;

[0019] Drive the armrest to rotate in the positive direction to the second angle, so that the angle adjuster is in the second state;

[0020] Drive the armrest to rotate in the opposite direction to the first angle, so that the angle adjuster is in the first state;

[0021] The direction of rotation from the bottom to the top is the positive direction, and the direction opposite to the positive direction is the negative direction.

[0022] In one or more embodiments, after driving the armrest to rotate forward to a second angle, placing the adjuster in a second state, the armrest is then driven to rotate forward to a third angle, the third angle being the angle at which the armrest is parallel to the back of the seat. Attached Figure Description

[0023] The above and other features, properties, and advantages of this application will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always denote the same features. It should be noted that these drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of protection actually claimed by this application, wherein:

[0024] Figure 1 This is a schematic diagram of the assembly of an angle adjuster according to one embodiment.

[0025] Figure 2 An exploded view of an example of an angle adjuster.

[0026] Figure 3 This is a schematic diagram of an angle adjuster in a first state according to an embodiment.

[0027] Figure 4 This is a schematic diagram of an angle adjuster in a second state according to an embodiment.

[0028] Figure 5 This is a schematic diagram of an angle adjuster rotating in the positive direction in a second state, according to one embodiment.

[0029] Figure 6 This is a schematic diagram of an angle adjuster rotating in the opposite direction in a second state, according to one embodiment.

[0030] Figure 7 This is a schematic diagram illustrating the return of the angle adjuster to its original position according to one embodiment.

[0031] Figure 8 This is a flowchart illustrating a method for adjusting a seat armrest according to one embodiment.

[0032] Figure label:

[0033] 1. Angle adjuster;

[0034] 10. Fixing part; 11. Limiting block; 12. Outer shell; 13. End cap; 14. Washer;

[0035] 20. Rotating part; 21. First rotating shaft; 220. First rotating member; 221. First wall surface; 222. Locking groove; 230. Second rotating member; 231. Second wall surface; 232. Third wall surface; 24. Rolling member; 25. Second elastic member; 26. Accommodating space; 27. Ramp;

[0036] 30. Reversing assembly; 31. Cam; 32. Locking element; 33. First elastic element; 34. Protrusion; 35. Follower block; 36. Second rotating shaft;

[0037] 2. The second object. Detailed Implementation

[0038] Reference will now be made in detail to various embodiments of this application, examples of which are shown in the accompanying drawings and described below. Although this application will be described in conjunction with exemplary embodiments, it should be understood that this application is not intended to be limited to those exemplary embodiments. Rather, this application is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of this application as defined by the appended claims.

[0039] This application uses specific terms to describe embodiments of the application. For example, "an embodiment" and / or "one embodiment" refers to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment" or "one embodiment" mentioned twice or more in different locations in this application does not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0040] In the following description, the terms "upper," "lower," "inner," "outer," "front," "rear," or other directional terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation, or be implemented in a specific orientation. Therefore, they should not be construed as limitations on this application. In this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying positional relationships or order of importance.

[0041] This application uses flowcharts to illustrate the operations performed according to embodiments of this application. It should be understood that, depending on the actual situation, the steps shown in the diagrams are not necessarily performed in the sequential order, and other operations may be added to these processes, or one or more steps may be removed from these processes.

[0042] As mentioned above, there is a need in this field to further develop steplessly adjustable angle adjusters. Considering that existing steplessly adjustable angle adjusters have problems such as complex structure, low strength of components that are easily damaged and cause functional failure, as well as difficulties in manufacturing and high cost, the inventors of this application have conducted in-depth research and proposed an angle adjuster in order to solve at least one of the above-mentioned technical problems.

[0043] It is understood that the angle adjuster provided in this application is particularly suitable for adjusting the angle of car seat armrests, but is not limited thereto. It can also be applied to situations where the rotation angle of other objects is adjusted, such as the angle adjustment of screens, the angle adjustment of seat headrests, etc.

[0044] refer to Figures 1 to 7As shown, an angle adjuster 1 according to one aspect of this application is used to adjust the rotation angle of a second object 2 relative to a first object. It includes: a fixing part 10, fixedly connected to the first object; a rotating part 20, fixedly connected to the second object 2 and rotatably connected to the fixing part 10; and a reversing assembly 30 for switching the angle adjuster 1 to operate in a first state or a second state, comprising a cam 31, a locking member 32, and a first elastic member 33. The cam 31 has a protrusion 34 and rotates under the drive of the rotating part 20. The locking member 32 includes a driven block 35 capable of abutting the protrusion 34 and rotatably connected to the fixing part 10. The first elastic member 33 pushes the locking member 32 toward the cam 31. In the first state, the driven block 35 does not abut against the protrusion 34, causing the locking member 32 to lock the rotating part 20. The rotating part 20 can only provide rotation in the positive direction and can be locked at any angle. In the second state, the driven block 35 abuts against the protrusion 34, causing the locking member 32 to unlock the rotating part 20. The rotating part 20 can provide rotation in the opposite direction. Optionally, the first object and the second object 2 can be a screen base and screen, a seat back and armrest, or a seat back and headrest, etc., respectively. In this application, the term "positive" refers to the rotatable direction provided by the adjuster 1 during stepless adjustment, and "opposite" is the direction opposite to the positive direction. For example, in Figures 3 to 7 The "positive direction" refers to the counterclockwise direction, and the "reverse direction" refers to the clockwise direction.

[0045] It is understood that an angle adjuster typically has angle adjustment and return functions, and it needs to switch between two working states to achieve these two functions. When the angle adjuster 1 operates in the first state, the rotating part 20 can rotate in the forward direction to any angle and lock, that is, it has a stepless adjustment function, which has higher adjustment accuracy compared to an angle adjuster with stepped adjustment. When operating in the second state, the rotating part 20 can rotate in the reverse direction, and achieves the return function. Compared with the existing angle adjusters that can be adjusted steplessly, the use of the reversing component 30 to switch the angle adjuster 1 to operate in the first state or the second state provides a stable switching effect, and makes the overall structure of the angle adjuster 1 simple and reasonable, with stable and reliable adjustment function, easy to process and manufacture, and low cost.

[0046] like Figure 2 , Figure 3As shown, specifically, the angle adjuster 1 can be used to adjust the relative rotation angle between the first object and the second object 2. The fixing part 10 is fixedly connected to the first object, and the rotating part 20 is fixedly connected to the second object 2. The cam 31 can be a disc cam, and the locking member 32 is radially disposed on one side of the outer circumference of the cam 31. The cam 31 and the rotating part 20 can be coaxially disposed, and the two do not rotate relative to each other. The first elastic member 33 abuts between the locking member 32 and the fixing part 10 so that the locking member 32 can return to its original position. When the cam 31 rotates with the rotating part 20, and the driven block 35 abuts against the protrusion 34, the locking member 32 is pushed out, so that the locking effect of the locking member 32 on the rotating part 20 is released. When the driven block 35 does not abut against the protrusion 34 and the locking member 32 returns to its original position, it can re-lock the rotating part 20 as the rotating part 20 rotates.

[0047] In one or more embodiments, in the second state, the rotating part 20 can also provide rotation in the positive direction; this design expands the range of angles that the angle adjuster 1 can be rotatably adjusted.

[0048] Optionally, the protrusion 34 of the cam 31 has a certain length to keep the locking member 32 in the pushed-out position; this design avoids the locking member 32 from undesirably returning to its original position and constraining the rotating part 20 when the rotating part 20 rotates in the positive direction in the second state.

[0049] like Figure 3 , Figure 5 As shown, in one or more embodiments, the fixing part 10 is provided with a limiting block 11 to limit the stroke of the rotating part 20 in the second state in the forward direction.

[0050] It can be understood that the rotating part 20 rotates relative to the fixed part 10, and the limiting block 11 is fixedly disposed on the fixed part 10 to limit the stroke of the rotating part 20. In addition, since the second object 2, the cam 31, etc. rotate synchronously with the rotating part 20, the limiting block 11 can also act on the second object 2 or the cam 31. The limiting block 11 can be used to prevent the rotating part 20 from rotating excessively in the forward direction. In addition, the limiting block 11 can also be used to hold the rotating part 20 at a specific angle of forward rotation. For example, the limiting block 11 is provided with a third elastic element that can clamp the rotating part 20 so that it can be clamped at a certain angle, and the elastic force of the third elastic element can be overcome to disengage the rotating part 20, but this is not the limitation. By using the limiting block 11 to limit the stroke of the rotating part 20 rotating in the forward direction in the second state, it can not only prevent the rotating part 20 from rotating excessively, but also add an angle adjustment position of the angle adjuster 1.

[0051] like Figures 3 to 7As shown, in one or more embodiments, the rotating part 20 includes: a first rotating shaft 21; a first rotating member 220, having a first wall surface 221 on one side of its inner periphery and a locking groove 222 on one side of its outer periphery for cooperating with the locking member 32; a second rotating member 230, having a plurality of second wall surfaces 231 and a plurality of third wall surfaces 232 on one side of its outer periphery; a plurality of rolling members 24; and a plurality of second elastic members 25; wherein the first rotating member 220 is rotatably connected to the fixed part 10 around the first rotating shaft 21; the cam 31 and the second rotating member 230 are fixedly connected to the first rotating shaft 21; the first wall surface 221 and the plurality of second wall surfaces 231 and the plurality of third wall surfaces 232 together define a plurality of accommodating spaces. In the space 26, a rolling element 24 and a second elastic element 25 are disposed within the accommodating space 26. The second wall surface 231 is provided with a slope 27 so that the gap between it and the first wall surface 221 is smaller than the diameter of the rolling element 24 on one side. The two ends of the second elastic element 25 are respectively connected to the rolling element 24 and the third wall surface 232 so that the rolling element 24 abuts against the slope 27. The locking element 32 cooperates with the locking groove 222 to prevent the first rotating element 220 from rotating and to allow the second rotating element 230 to rotate only in the forward direction. The locking element 32 separates from the locking groove 222, allowing the first rotating element 220 to rotate and allowing the second rotating element 230 to rotate in the forward or reverse direction. Specifically, the first wall surface 221 can be annular; the locking groove 222 can be multiple; the rolling element can be spherical or cylindrical, etc.; the gap between the first wall surface 221 and the second wall surface 231 should have a portion with a size not less than the diameter of the rolling element to accommodate the rolling element 24; the third wall surface can extend radially outward; the locking element 24 can be rotatably connected to the fixing part 10 via the second rotating shaft 36. It can be understood that the angle adjuster 1 can rotate freely in both directions in the second state, either selectively rotating in the reverse direction to return it to the first state in one go, or selectively continuing to rotate in the forward direction to stop the second object at the third angle, thereby achieving another angle adjustment level outside the angle adjustment range of the stepless adjustment function.

[0052] The design of the rotating part 20 allows for switching between two rotation modes: unidirectional and bidirectional rotation. In other words, it can achieve forward rotation in the first state for stepless adjustment, and reverse rotation in the second state for return to position. It can also continue to rotate forward in the second state to allow the rotating part 20 to reach an increased angle adjustment level. The structure is simple, strong, and has good load-bearing capacity, as well as high rotational stability.

[0053] In one or more embodiments, at least three locking grooves 222 are evenly distributed on one side of the outer periphery of the first rotating member 220; preferably, as shown in the figure. Figures 3 to 7 As shown, there are 10 locking slots 222; this design is particularly suitable for adjusting the angle of the seat armrest, and can provide an ideal range of stepless angle adjustment.

[0054] In one or more embodiments, the number of rolling elements 24 is not less than three. This design results in high structural strength, good load-bearing capacity, and smoother rotation. Preferably, as shown in the following embodiments... Figures 3 to 7 As shown, the number of the rolling elements 24 is 7.

[0055] like Figure 1 As shown, in one or more embodiments, the fixing part 10 includes: a housing 12; and an end cap 13, which is fixedly connected to the housing 12; wherein the housing 12 and the end cap 13 together define a cavity for providing an installation position for the rotating part 20 and the reversing assembly 30. Optionally, the limiting block 11 is disposed on the housing 12; the housing may also be provided with a connection structure for connecting with the first object.

[0056] like Figure 2 As shown, in one or more embodiments, the fixing part 10 is provided with a washer 14 that contacts the rotating part 20. Optionally, the washer 14 is made of POM plastic; optionally, the washer 14 is disposed between the first rotating member 220 and the outer shell 12; the washer design facilitates lubrication between the rotating part 20 and the fixing part 10, and ensures the installation and positioning of the rotating part 20 within the fixing part 10, avoiding direct contact between the outer shell 12 and the rotating part 20, thereby improving service life and reducing maintenance costs.

[0057] See Figures 3 to 7 In one or more embodiments, the specific working process of the angle adjuster 1 is as follows: Figure 3As shown, when the second object 2 is at the first angle, the locking member 32 falls into the locking groove 222, that is, the angle adjuster 1 is in the first state. At this time, the first rotating member 220 cannot rotate relative to the fixed part 10. The first wall surface 221, the ramp 27, the rolling member 24 and the second elastic member 25 in the accommodating space 26 form a one-way check structure. The second rotating member 230 can only rotate in the forward direction (i.e., counterclockwise direction as shown in the figure). Driving the second rotating member 230 in the reverse direction will cause the rolling member 24 to wedge into the gap between the first wall surface 221 and the ramp 27, generating great resistance to lock the rotation in the reverse direction. When the second object 2 continues to rotate in the forward direction, and the driven block 35 does not abut against the protrusion 34, the angle adjuster 1 is still in the first state. At this time, the angle adjuster 1 can be locked at the expected angle as needed to achieve stepless adjustment. Figure 4 As shown, when the second object 2 rotates to the second angle in the forward direction, the driven block 35 abuts against the protrusion 34, causing the locking member 32 to separate from the locking groove 222. The angle adjuster 1 enters the second state. At this time, the first rotating member 220 can rotate relative to the fixed part 10, causing the anti-return structure in the accommodating space 26 to fail. The second rotating member 230 can rotate in the forward or reverse direction. At the same time, the first rotating member 220 can rotate synchronously with the second rotating member 230 due to the friction of the rolling member 24, etc. Figure 5 As shown, when the second object 2 continues to rotate in the positive direction to the third angle, the rotating part 20 or the cam 31 stops rotating due to the action of the limiting block 11; as Figure 6 As shown, when the angle adjuster 1 is in the second state, and the second object 2 rotates in the opposite direction to the second angle, the locking member 32 engages and can slide over the side wall of the previously separated locking groove 222; as Figure 7 As shown, when the second object 2 continues to rotate in the opposite direction to the first angle in the second state, the locking member 32 falls into another locking groove 222 adjacent to the previously separated locking groove 222. At this time, the second object 2 returns to its original position, and the angle adjuster 1 re-enters the first state. The term "expected angle" refers to an angle that meets the needs of use, such as the angle at which the armrest can be used comfortably in seat armrest adjustment.

[0058] According to a second aspect of this application, a seat includes an angle adjuster 1 as described in the above embodiments, wherein the rotating part 20 is fixedly connected to the armrest, and the fixing part 10 is fixedly connected to the seat body; the seat body refers to the part of the seat that is different from the armrest, for example, the fixing part may be fixedly connected to the backrest or the frame of the seat.

[0059] Optionally, the positive direction is the rotation direction from the bottom to the top, that is, the rotation direction from the seat to the backrest. It can be understood that at this time, the initial angle of the armrest, that is, the first angle, is below the second angle. The armrest is rotated upward to infinitely adjust to the expected angle between the first angle and the second angle, and the armrest is rotated upward to the second angle so that the angle adjuster 1 enters the second state for return, etc. This design provides a better user experience and can prevent the armrest from falling under the action of gravity.

[0060] In one or more embodiments, when the angle adjuster 1 is in the second state, the armrest can rotate in the positive direction and stop rotating at the third angle, which is the angle at which the armrest is parallel to the back of the seat; this design allows the armrest to be stored on the side of the back of the seat and creates a larger space for the user to pass through, etc.

[0061] refer to Figure 8 As shown, according to a third aspect of this application, a method for adjusting the armrests of a seat, using the seat described in the above embodiments, includes:

[0062] S100. Position the angle adjuster in the first state;

[0063] S200. Drive the handrail to rotate in the positive direction to a desired angle between the first angle and the second angle;

[0064] S300. Drive the handrail to rotate in the positive direction to the second angle, so that the angle adjuster is in the second state;

[0065] S400. Drive the handrail to rotate in the opposite direction to the first angle, and proceed to step S100;

[0066] The direction of rotation from the bottom to the top is the positive direction, and the direction opposite to the positive direction is the negative direction; the expected angle is the angle that meets the usage requirements.

[0067] In one or more embodiments, step S400 specifically includes:

[0068] S401. Drive the armrest to rotate in the positive direction to a third angle, the third angle being the angle at which the armrest is parallel to the back of the seat;

[0069] S402. Drive the handrail to rotate in the opposite direction to the first angle, and proceed to step S100.

[0070] It can be understood that in the embodiment where the angle adjuster 1 can rotate bidirectionally in the second state, it can be directly rotated in the opposite direction to return to the initial first angle; or, it can be first rotated in the forward direction to the third angle, and when it needs to return to the original position, it can be rotated in the reverse direction to the first angle.

[0071] In summary, the advanced technical effects of this application include, but are not limited to, at least one of the following:

[0072] 1. When the angle adjuster operates in the first state, the rotating part can rotate in the forward direction to any angle and lock, thus having a stepless adjustment function and higher adjustment accuracy compared to an angle adjuster with stepped adjustment; when operating in the second state, the rotating part can rotate in the reverse direction, thus realizing a return function; compared to existing stepless adjustable angle adjusters, the use of the reversing component to switch the angle adjuster to operate in the first state or the second state provides a stable switching effect, and makes the overall structure of the angle adjuster simple and reasonable, with stable and reliable adjustment function, easy to process and manufacture, and low cost.

[0073] 2. The rotating part design allows for switching between two rotation modes: unidirectional and bidirectional rotation. In other words, it can achieve forward rotation for stepless adjustment in the first state, and reverse rotation for return to position in the second state. It can also continue to rotate forward in the second state to allow the rotating part to reach an increased angle adjustment level. The structure is simple, strong, and has good load-bearing capacity, as well as high rotational stability.

[0074] While this application discloses preferred embodiments as described above, it is not intended to limit the scope of this application. Any changes and modifications can be made by those skilled in the art without departing from the spirit and scope of this application. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application, without departing from the content of the technical solution of this application, fall within the protection scope defined by the claims of this application.

Claims

1. An angle adjuster (1) for adjusting the rotation angle of a second object (2) relative to a first object, characterized in that, include: The fixing part (10) is fixedly connected to the first object; The rotating part (20) is fixedly connected to the second object (2) and rotatably connected to the fixing part (10); A reversing assembly (30) is used to switch the angle adjuster (1) to operate in a first state or a second state. It includes a cam (31), a locking member (32), and a first elastic member (33). The cam (31) has a protrusion (34) and rotates under the drive of the rotating part (20). The locking member (32) includes a driven block (35) that can abut against the protrusion (34) and is rotatably connected to the fixing part (10). The first elastic member (33) presses the locking member (32) toward the cam (31). In the first state, the driven block (35) disengages from the protrusion (34), and the locking member (32) locks the rotating part (20) so that the rotating part (20) can only provide rotation in the positive direction and can be locked at any angle; In the second state, the driven block (35) abuts against the protrusion (34), and the locking member (32) is unlocked from the rotating part (20), so that the rotating part (20) can provide rotation in the opposite direction.

2. The angle adjuster (1) according to claim 1, characterized in that, In the second state, the rotating part (20) is also able to provide rotation in the positive direction.

3. The angle adjuster (1) according to claim 2, characterized in that, The fixing part (10) is provided with a limiting block (11) to limit the stroke of the rotating part (20) in the second state in the positive direction.

4. The angle adjuster (1) according to claim 1, characterized in that, The rotating part (20) includes: First rotating shaft (21); The first rotating member (220) has a first wall surface (221) on one side of its inner circumference and a locking groove (222) on one side of its outer circumference for cooperating with the locking member (32). The second rotating member (230) has multiple second walls (231) and multiple third walls (232) on one side of its outer periphery; Multiple rolling elements (24); Multiple second elastic elements (25); The first rotating member (220) is rotatably connected to the fixed part (10) around the first rotating shaft (21); the cam (31) and the second rotating member (230) are fixedly connected to the first rotating shaft (21); the first wall surface (221) and a plurality of second wall surfaces (231) and a plurality of third wall surfaces (232) together define a plurality of accommodating spaces (26); a rolling member (24) and a second elastic member (25) are disposed in one of the accommodating spaces (26); the second wall surface (231) is provided with a ramp (27) so that the gap between it and the first wall surface (221) has a size smaller than the diameter of the rolling member (24) on one side; the two ends of the second elastic member (25) are respectively connected to the rolling member (24) and the third wall surface (232), so that the rolling member (24) abuts against the ramp (27).

5. The angle adjuster (1) according to claim 4, characterized in that, The locking member (32) cooperates with the locking groove (222) to lock the first rotating member (220) and to allow the second rotating member (230) to rotate only in the forward direction; the locking member (32) separates from the locking groove (222) to allow the first rotating member (220) to rotate and to allow the second rotating member (230) to rotate in the forward or reverse direction.

6. The angle adjuster (1) according to claim 1, characterized in that, The fixing part (10) includes: Outer shell (12); End cap (13) is fixedly connected to the outer shell (12); The outer shell (12) and the end cap (13) together define a cavity for providing mounting positions for the rotating part (20) and the reversing assembly (30).

7. The angle adjuster (1) according to claim 1, characterized in that, The fixing part (10) is provided with a washer (14) that contacts the rotating part (20).

8. A type of seat, characterized in that, Includes the angle adjuster (1) as described in any one of claims 1 to 7, wherein the rotating part (20) is fixedly connected to the armrest and the fixing part (10) is fixedly connected to the seat body.

9. A method for adjusting a seat armrest, characterized in that, The adjustment method, applicable to the seat as described in claim 8, comprises: Put the angle adjuster (1) into the first state; Drive the handrail to rotate in the positive direction to a desired angle between the first angle and the second angle; Drive the armrest to rotate in the positive direction to the second angle, so that the angle adjuster (1) is in the second state; Drive the armrest to rotate in the opposite direction to the first angle, so that the angle adjuster (1) is in the first state; The direction of rotation from the bottom to the top is the positive direction, and the direction opposite to the positive direction is the negative direction.

10. The method for adjusting a seat armrest according to claim 9, characterized in that, After driving the armrest to rotate in the positive direction to the second angle, so that the angle adjuster (1) is in the second state, drive the armrest to rotate in the positive direction to the third angle, the third angle being the angle at which the armrest is parallel to the back of the seat.

Images