Angle adjusting structure for seat armrest and seat armrest

Abstract

The invention relates to the technical field of seat adjustment, in particular to an angle adjusting structure for a seat armrest and the seat armrest, and the angle adjusting structure comprises an adjusting mechanism and an unlocking mechanism. The adjusting mechanism comprises a supporting assembly, a limiting assembly and an adjusting assembly, the supporting assembly is used for connecting an armrest and a seat, the limiting assembly and the adjusting assembly are movably arranged on the supporting assembly, and the limiting assembly and the adjusting assembly are oppositely arranged in the armrest. The adjusting assembly is used for being connected with the handrail, and the limiting assembly is used for enabling the adjusting assembly to rotate in one direction; the unlocking mechanism is arranged on the handrail and connected with the limiting assembly. The unlocking mechanism is used for driving the limiting assembly to be away from the adjusting assembly. The adjusting device has the effect of expanding the adjusting range.

Description

Technical Field

[0001] The present application relates to the technical field of seat adjustment, and in particular to an angle adjustment structure for a seat armrest and a seat armrest. Background Art

[0002] At present, as an important part of the seat, the seat armrest is widely used in various seats such as cars, office chairs, sofas, etc. Its main function is to provide users with comfortable support and reduce arm and shoulder fatigue. The seat armrest angle adjustment function is an important part in modern seat design. The common seat armrest angle adjustment methods on the market mainly include a combination structure of a semi-ratchet, a pawl and a guide plate. Specifically, this structure achieves the angle adjustment of the armrest through the cooperation of the ratchet and the pawl. Among them, the ratchet is fixed on the armrest, and the pawl is connected to the armrest shell. When the armrest is turned counterclockwise, the ratchet rotates accordingly, thereby driving the entire armrest to adjust to the desired angle.

[0003] Regarding the above-mentioned related technologies: due to the limited number of contact points between the ratchet and the pawl, the angle range that the armrest can be adjusted is relatively small, so there is a problem of limited adjustment range. Summary of the invention

[0004] In order to expand the adjustment range, the present application provides an angle adjustment structure for a seat armrest and a seat armrest.

[0005] In the first aspect, the present application provides an angle adjustment structure for a chair armrest, which adopts the following technical solution: An angle adjustment structure for a seat armrest, comprising: The adjustment mechanism comprises a support assembly, a limit assembly and an adjustment assembly, wherein the support assembly is used to connect the armrest and the seat, the limit assembly and the adjustment assembly are movably arranged on the support assembly, the limit assembly and the adjustment assembly are arranged inside the armrest relative to each other, the adjustment assembly is used to connect with the armrest, and the limit assembly is used to make the adjustment assembly rotate in one direction; An unlocking mechanism is arranged on the armrest and connected to the limiting assembly, and the unlocking mechanism is used to drive the limiting assembly away from the adjusting assembly.

[0006] By adopting the above technical solution, the seat armrest can achieve stepless adjustment and one-way locking functions within a 360° range. Specifically, the support component connects the armrest and the seat to ensure structural stability and reliability; the limit component can limit the adjustment component to allow the adjustment component to rotate in one direction, so that the armrest can be smoothly adjusted in angle along a single direction, and one-way locking can be achieved at a specific position to prevent rotation. And when the armrest needs to be reset, the unlocking mechanism can drive the limit component away from the adjustment component to release the constraint of the limit component on the adjustment component, thereby achieving quick unlocking and a wide range of angle adjustment. This design not only improves the user's convenience, but also significantly expands the adjustment range of the seat armrest, improving the overall performance and user experience of the product.

[0007] Optionally, the supporting assembly includes a rotating shaft, which is rotatably connected to the armrest; the adjusting assembly includes a first gear, which is arranged on the armrest and coaxially with the rotating shaft; the limiting assembly includes a second gear, which is coaxial and movably arranged on the rotating shaft, and the second gear is meshed with the first gear; the unlocking mechanism is connected to the second gear, and the unlocking mechanism is used to drive the second gear to approach or move away from the first gear.

[0008] By adopting the above technical solution, when the armrest angle needs to be adjusted, the unlocking mechanism drives the second gear away from the first gear, so that the second gear no longer limits the armrest through the first gear, so that the armrest can be freely adjusted within a 360° range. And when the armrest needs to be fixed, the unlocking mechanism drives the second gear close to the first gear, so that the first gear and the second gear are meshed with each other, and the second gear limits the first gear, thereby facilitating the locking of the armrest and ensuring that the armrest will not accidentally loosen during use.

[0009] Optionally, the first gear and the second gear are both helical gears, and the limiting assembly includes an elastic member, which is arranged between the second gear and the inner wall of the armrest, and the elastic member is used to push the second gear to engage with the first gear.

[0010] By adopting the above technical solution, the first gear and the second gear are both designed as helical gears, so that when the first gear rotates counterclockwise, the first gear can push the second gear to move in the direction close to the elastic member to compress the elastic member, and the second gear no longer limits the first gear, and when the first gear stops rotating, the elastic member can push the second gear to mesh with the first gear. At this time, the second gear can limit the first gear so that the first gear is not easy to rotate clockwise, thereby facilitating smooth and stepless adjustment of the armrest within a range of 360°, which is conducive to expanding the adjustment range of the seat armrest.

[0011] Optionally, a slide groove is provided on the rotating shaft along its own axial direction, and a limit rod is provided on the second gear, and the limit rod is slidably inserted in the slide groove.

[0012] By adopting the above technical solution, the limit rod is slidably inserted into the slide groove on the rotating shaft, which can ensure that the second gear moves smoothly along the preset path during the adjustment process, avoiding the problem of inaccurate meshing caused by position offset, and improving the stability and reliability of the adjustment process. At the same time, this design can also effectively prevent the second gear from rotating when subjected to force, ensuring the effectiveness of the locking function and improving the user experience.

[0013] Optionally, the unlocking mechanism includes a button and a linkage assembly, the button is movably arranged on the armrest, the linkage assembly is arranged in the armrest, the linkage assembly is respectively connected to the button and the second gear, and the button can drive the second gear away from the first gear through the linkage assembly.

[0014] By adopting the above technical solution, the button is movably arranged on the armrest, the linkage assembly is arranged inside the armrest, the linkage assembly is respectively connected to the button and the second gear, and the button can drive the second gear away from the first gear through the linkage assembly. This design allows the user to quickly unlock the double gears by simply pressing the button, which is simple and quick to operate, greatly improving the user experience. At the same time, the design also ensures the safety and reliability of the unlocking process, avoiding the risk of misoperation caused by complex operations in traditional structures.

[0015] Optionally, the linkage assembly includes a bracket, a first link, a second link, a third link and a steel wire rope, the bracket is arranged in the armrest, the first link is rotatably connected in the armrest, one end of the first link is in contact with the button, the second link is hinged on the bracket, one end of the second link is movably connected to the first link, the other end of the second link is movably connected to the third link, one end of the third link away from the second link is connected to the second gear, and the steel wire rope is respectively connected to the first link and the second link.

[0016] By adopting the above technical solution, when the user presses the button, the first connecting rod rotates due to the pressing force, the first connecting rod pulls the second connecting rod to move through the wire rope, the second connecting rod then drives the third connecting rod to move, and the third connecting rod drives the second gear to move, so that the second gear is separated from the first gear. This process realizes the quick unlocking function of the armrest, and the user can easily adjust the angle of the armrest without complicated operations. At the same time, the design of the wire rope ensures the reliability and stability of the transmission, and improves the working efficiency and response speed of the entire unlocking mechanism. This design not only simplifies the user's operating steps, but also enhances the convenience and comfort of the seat armrest in actual use.

[0017] Optionally, a reset member is provided between the second connecting rod and the bracket, and the reset member is used to push the second connecting rod to reset.

[0018] By adopting the above technical solution, when the button is pressed, the first connecting rod is forced to move downward, driving the wire rope to pull the second connecting rod to rotate clockwise, and then pushing the third connecting rod to move, so that the second gear is away from the first gear, realizing the quick unlocking function of the armrest. After releasing the button, the reset member pushes the second connecting rod to automatically reset to the initial position, ensuring the reliability of the next operation. This design ensures the smoothness and stability of the unlocking process and improves the user experience.

[0019] Optionally, the linkage assembly includes a card plate, a card plate is provided with a card slot, the second gear is inserted into the card slot and fixedly connected to the card plate, and the card plate is connected to the third connecting rod.

[0020] By adopting the above technical solution, the card slot on the card plate can firmly fix the second gear, ensuring that the second gear will not deviate or fall off during the adjustment process. At the same time, the connection between the card plate and the third connecting rod makes the unlocking operation smoother and more reliable. This design not only improves the stability and reliability of the mechanism, but also simplifies the user's operation steps and improves the user experience.

[0021] Optionally, a protrusion is provided at one end of the second connecting rod away from the steel wire rope, and a movable groove is provided at one end of the third connecting rod close to the second connecting rod, and the protrusion is slidably inserted in the movable groove.

[0022] By adopting the above technical solution, when the protrusion on the second connecting rod is inserted into the movable groove of the third connecting rod, the connection between the two can be ensured to be more stable and reliable. This design can not only effectively transmit the action of pressing the button, but also ensure that the second gear is smoothly away from the first gear during the unlocking process, thereby realizing the quick unlocking function of the armrest. At the same time, the design of the movable groove allows the protrusion to slide freely within a certain range, avoiding the problem of unsmooth movement caused by the rigid connection between the components, and further improving the convenience and reliability of the operation of the mechanism.

[0023] In a second aspect, the present application provides a seat armrest, which adopts the angle adjustment structure for the seat armrest described in any one of the above contents.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. Through the cooperation of the support component, the limit component, the adjustment component and the unlocking mechanism, the seat armrest can achieve stepless adjustment and one-way locking function within a 360° range, thus significantly improving the adjustment range and flexibility; 2. Through the cooperation of the rotating shaft, the first gear, the second gear and the elastic member, the armrest can drive the first gear to rotate counterclockwise, and the second gear can limit the clockwise rotation of the first gear and the armrest, so that the armrest can be smoothly and steplessly adjusted within a range of 360°, which is conducive to expanding the adjustment range of the seat armrest; 3. Through the mutual cooperation of the bracket, the first connecting rod, the second connecting rod, the third connecting rod, the wire rope and the reset member, when the user presses the button, the second gear can be driven away from the first gear through the first connecting rod, the wire rope, the second connecting rod and the third connecting rod in sequence, thereby realizing the quick unlocking function of the armrest. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of an angle adjustment structure for a seat armrest in an embodiment of the present application.

[0026] Figure 2 It is a partial structural schematic diagram of an angle adjustment structure for a seat armrest in an embodiment of the present application.

[0027] Figure 3 It is a partial structural schematic diagram of an angle adjustment structure for a seat armrest without a mounting frame in an embodiment of the present application.

[0028] Figure 4 It is a partial structural diagram of the support assembly, the limit assembly and the unlocking mechanism in the embodiment of the present application.

[0029] Figure 5 yes Figure 3 A partial enlarged view of point A in the middle.

[0030] Description of reference numerals: 1. Adjustment mechanism; 11. Support assembly; 111. Rotating shaft; 1111. Slide groove; 1112. Displacement groove; 112. Mounting frame; 12. Limiting assembly; 121. Second gear; 1211. Limiting rod; 122. Elastic member; 13. Adjustment assembly; 131. First gear; 132. Connecting plate; 2. Unlocking mechanism; 21. Button; 22. Linkage assembly; 221. Bracket; 222. First connecting rod; 223. Second connecting rod; 2231. Protrusion; 224. Third connecting rod; 2241. Movable groove; 225. Wire rope; 226. Reset member; 227. Card plate; 2271. Connecting groove; 2272. Fixing rod; 3. Armrest; 4. Folding mechanism. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 This application is described in further detail.

[0032] The embodiment of the present application discloses an angle adjustment structure for a seat armrest.

[0033] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] Reference Figure 1 An angle adjustment structure for a seat armrest includes an adjustment mechanism 1 and an unlocking mechanism 2. The adjustment mechanism 1 and the unlocking mechanism 2 are respectively arranged in the armrest 3, and the adjustment mechanism 1 is connected to the unlocking mechanism 2. The adjustment mechanism 1 is used to make the armrest 3 rotate in one direction, and the unlocking mechanism 2 is used to unlock the adjustment mechanism 1 so as to reset the armrest 3, so that the armrest 3 can achieve 360° stepless adjustment, locking and unlocking.

[0035] The adjustment mechanism 1 includes a support assembly 11, a limit assembly 12 and an adjustment assembly 13. The support assembly 11 is used to connect the armrest 3 and the seat. The limit assembly 12 and the adjustment assembly 13 are movably arranged on the support assembly 11, and the limit assembly 12 and the adjustment assembly 13 are arranged inside the armrest 3 relative to each other.

[0036] Reference Figure 1 and Figure 2 The support assembly 11 includes a rotating shaft 111 and a mounting frame 112. The mounting frame 112 is installed inside the armrest 3, one end of the rotating shaft 111 extends into the mounting frame 112 and is rotatably connected to the mounting frame 112 and the armrest 3 respectively, and the other end of the rotating shaft 111 extends out of the armrest 3 and is connected to a folding mechanism 4, which is installed on the seat and connected to the armrest 3, so that the folding function of the armrest 3 can be realized by using the folding mechanism 4. In this embodiment, the adjustment assembly 13 and the limit assembly 12 are respectively arranged in the mounting frame 112. In other embodiments, the mounting frame 112 may not be provided, and the adjustment assembly 13 and the limit assembly 12 may be directly arranged inside the armrest 3.

[0037] It should be noted that how to set the specific structure of the folding mechanism 4 is a conventional technical means for those skilled in the art, and therefore, it will not be described in detail in the embodiments of the present application.

[0038] Reference Figure 2 and Figure 3The adjustment assembly 13 includes a first gear 131 and a connecting plate 132 fixedly connected to the first gear 131. The connecting plate 132 is fixedly connected to the mounting frame 112 by screws, so that the first gear 131 can be fixed by the connecting plate 132. At this time, the first gear 131 is coaxial with the rotating shaft 111. In this embodiment, the first gear 131 is made of high-strength stainless steel material, and the number of teeth can be adjusted according to actual needs to achieve the required adjustment accuracy.

[0039] Reference Figure 3 and Figure 4 , a slide groove 1111 is provided on the rotating shaft 111 along its own axial direction. The limiting assembly 12 includes a second gear 121 and an elastic member 122. Among them, a limiting rod 1211 is fixedly connected to the second gear 121, and the limiting rod 1211 is slidably inserted into the slide groove 1111, so as to facilitate the coaxial connection of the second gear 121 to the rotating shaft 111, and enable the second gear 121 to slide along the axial direction of the rotating shaft 111. At the same time, the limiting rod 1211 can limit the second gear 121 to prevent the second gear 121 from deviating during the rotation process.

[0040] Reference Figure 2 The elastic member 122 is sleeved on the rotating shaft 111, and the elastic member 122 is respectively fixedly connected to the second gear 121 and the mounting frame 112. In this embodiment, the elastic member 122 is a spring, so that the elastic member 122 can be used to push the second gear 121 to move toward the first gear 131, so that the second gear 121 and the first gear 131 are meshed with each other.

[0041] Reference Figure 5 In this embodiment, the first gear 131 and the second gear 121 are both angled helical gears.

[0042] Reference Figure 1 and Figure 3 When the armrest 3 drives the first gear 131 to rotate counterclockwise, the first gear 131 can push the second gear 121 to move toward the elastic member 122 to compress the elastic member 122. At this time, the second gear 121 no longer limits the first gear 131, thereby facilitating the 360° stepless adjustment of the armrest 3. When the first gear 131 stops rotating, the elastic member 122 can push the second gear 121 to engage with the first gear 131. At this time, the second gear 121 can limit the first gear 131, so that the first gear 131 is not easy to rotate clockwise, thereby facilitating the fixing of the armrest 3.

[0043] Reference Figure 1 The unlocking mechanism 2 includes a button 21 and a linkage assembly 22. The button 21 is movably arranged on the armrest 3, and one end of the button 21 extends out of the armrest 3 for user operation.

[0044] Reference Figure 1 and Figure 3 The linkage assembly 22 includes a bracket 221, a first link 222, a second link 223, a third link 224, a steel wire 225, a reset member 226 and a clamp 227. The bracket 221 is fixed inside the handrail 3, and the bracket 221 is arranged close to the mounting frame 112. The first link 222 is rotatably connected inside the handrail 3, and one end of the first link 222 contacts the button 21, and the other end of the first link 222 is connected and fixed to the steel wire 225.

[0045] Reference Figure 3 The second connecting rod 223 is hinged on the bracket 221, and one end of the second connecting rod 223 is connected to the wire rope 225, and the other end of the second connecting rod 223 is fixedly connected to the protrusion 2231. One end of the third connecting rod 224 is provided with a movable groove 2241, and the protrusion 2231 is slidably inserted in the movable groove 2241 and fits with the inner wall of the movable groove 2241, and the end of the third connecting rod 224 away from the movable groove 2241 is fixedly connected to the clamping plate 227.

[0046] Reference Figure 3 and Figure 4 The clamping plate 227 is provided with a clamping groove 2271, which is adapted to the second gear 121. The second gear 121 is inserted into the clamping groove 2271 and fixedly connected to the clamping plate 227. In this embodiment, the rotating shaft 111 is provided with a clearance groove 1112, and a fixing rod 2272 is fixedly connected to the clamping plate 227, and the fixing rod 2272 and the limiting rod 1211 are perpendicular to each other. The fixing rod 2272 passes through the clearance groove 1112 and is fixedly connected to the second gear 121, thereby ensuring that the second gear 121 will not deviate or fall off during the adjustment process.

[0047] Reference Figure 1 and Figure 3 When the user presses the button 21, the button 21 pushes the first connecting rod 222 to rotate, the first connecting rod 222 pulls the second connecting rod 223 through the wire rope 225, the second connecting rod 223 drives the third connecting rod 224 to move through the protrusion 2231, and the third connecting rod 224 drives the card plate 227 to move, so as to drive the second gear 121 away from the first gear 131, release the double gear meshing relationship, and realize the quick unlocking function of the armrest 3.

[0048] The reset member 226 is disposed between the second connecting rod 223 and the bracket 221. In this embodiment, the reset member 226 is a spring, so that the reset member 226 is used to push the second connecting rod 223 to reset, and then when the user releases the button 21, the reset member 226 can push the second connecting rod 223 to return to the initial state, and at the same time, the elastic member 122 pushes the second gear 121 to move in a direction close to the first gear 131, so as to re-establish the meshing relationship of the double gears and realize the re-locking function.

[0049] In another preferred embodiment, a support sleeve may be disposed outside the reset member 226 , and the support sleeve is connected and fixed to the bracket 221 to improve the stability of the reset member 226 during deformation.

[0050] In another preferred embodiment, the elastic member 122 may not be provided, and the unlocking mechanism 2 is used to drive the second gear 121 to approach or move away from the first gear 131 to achieve the locking and unlocking functions.

[0051] The implementation principle of the angle adjustment structure for a chair armrest in the embodiment of the present application is as follows: when the angle of the armrest 3 needs to be adjusted, the armrest 3 is rotated counterclockwise, the armrest 3 drives the first gear 131 to rotate, and the first gear 131 pushes the second gear 121 to move in the direction close to the elastic member 122, so that the second gear 121 no longer limits the first gear 131, thereby facilitating the adjustment of the armrest 3 to a specified angle. At this time, the armrest 3 is no longer rotated, and the elastic member 122 pushes the second gear 121 to mesh with the first gear 131, so that the first gear 131 is not easy to rotate clockwise, thereby achieving the fixation of the armrest 3.

[0052] When the armrest 3 needs to be reset, pressure is first applied to the button 21, which pushes the first connecting rod 222 to rotate. The first connecting rod 222 pulls the second connecting rod 223 through the wire rope 225. The second connecting rod 223 drives the third connecting rod 224 to move through the protrusion 2231. The third connecting rod 224 drives the clamping plate 227 to move, so as to drive the second gear 121 away from the first gear 131, thereby releasing the double gear meshing relationship and facilitating the reset of the armrest 3.

[0053] In the embodiment of the present application, the internal double gear meshing structure design realizes the 360° stepless adjustment and unidirectional locking function of the armrest 3, thereby effectively expanding the adjustment range of the armrest 3 and improving the overall performance and user experience of the product.

[0054] The embodiment of the present application also discloses a seat armrest, including the angle adjustment structure for the seat armrest described above.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An angle adjustment structure for a seat armrest, characterized in that: include: An adjustment mechanism (1) comprises a support assembly (11), a limit assembly (12) and an adjustment assembly (13), wherein the support assembly (11) is used to connect an armrest (3) and a seat, the limit assembly (12) and the adjustment assembly (13) are respectively movably arranged on the support assembly (11), the limit assembly (12) and the adjustment assembly (13) are arranged relatively inside the armrest (3), the adjustment assembly (13) is used to be connected to the armrest (3), and the limit assembly (12) is used to enable the adjustment assembly (13) to rotate in one direction; An unlocking mechanism (2) is arranged on the armrest (3) and connected to the limiting assembly (12), wherein the unlocking mechanism (2) is used to drive the limiting assembly (12) away from the adjusting assembly (13).

2. The seat armrest angle adjustment structure according to claim 1, characterized in that: The support assembly (11) comprises a rotating shaft (111), the rotating shaft (111) being rotatably connected to the armrest (3); the adjustment assembly (13) comprises a first gear (131), the first gear (131) being arranged on the armrest (3) and being coaxially arranged with the rotating shaft (111); the limiting assembly (12) comprises a second gear (121), the second gear (121) being coaxially and movably arranged on the rotating shaft (111), the second gear (121) and the first gear (131) being meshed with each other; the unlocking mechanism (2) is connected to the second gear (121), and the unlocking mechanism (2) is used to drive the second gear (121) to approach or move away from the first gear (131).

3. The seat armrest angle adjustment structure according to claim 2, characterized in that: The first gear (131) and the second gear (121) are both helical gears. The limit assembly (12) comprises an elastic member (122). The elastic member (122) is arranged between the second gear (121) and the inner wall of the armrest (3). The elastic member (122) is used to push the second gear (121) and the first gear (131) to mesh with each other.

4. The seat armrest angle adjustment structure according to claim 3, characterized in that: The rotating shaft (111) is provided with a sliding groove (1111) along its own axial direction, and the second gear (121) is provided with a limiting rod (1211), and the limiting rod (1211) is slidably inserted in the sliding groove (1111).

5. The seat armrest angle adjustment structure according to claim 2, characterized in that: The unlocking mechanism (2) comprises a button (21) and a linkage assembly (22); the button (21) is movably arranged on the armrest (3); the linkage assembly (22) is arranged in the armrest (3); the linkage assembly (22) is respectively connected to the button (21) and the second gear (121); the button (21) can drive the second gear (121) to move away from the first gear (131) through the linkage assembly (22).

6. The seat armrest angle adjustment structure according to claim 5, characterized in that: The linkage assembly (22) comprises a bracket (221), a first link (222), a second link (223), a third link (224) and a steel wire rope (225); the bracket (221) is arranged in the handrail (3); the first link (222) is rotatably connected in the handrail (3); one end of the first link (222) contacts the button (21); the second link (223) is hinged on the bracket (221); one end of the second link (223) is movably connected to the first link (222); the other end of the second link (223) is movably connected to the third link (224); one end of the third link (224) away from the second link (223) is connected to the second gear (121); and the steel wire rope (225) is respectively connected to the first link (222) and the second link (223).

7. The seat armrest angle adjustment structure according to claim 6, characterized in that: A reset member (226) is provided between the second connecting rod (223) and the bracket (221), and the reset member (226) is used to push the second connecting rod (223) to reset.

8. The seat armrest angle adjustment structure according to claim 6, characterized in that: The linkage assembly (22) comprises a clamping plate (227), the clamping plate (227) being provided with a clamping groove (2271), the second gear (121) being inserted into the clamping groove (2271) and fixedly connected to the clamping plate (227), and the clamping plate (227) being connected to the third connecting rod (224).

9. The seat armrest angle adjustment structure according to claim 6, characterized in that: A protrusion (2231) is provided at one end of the second connecting rod (223) away from the steel wire rope (225), and a movable groove (2241) is provided at one end of the third connecting rod (224) close to the second connecting rod (223), and the protrusion (2231) is slidably inserted in the movable groove (2241).

10. A chair armrest, characterized in that: The invention comprises the angle adjustment structure for the seat armrest according to any one of claims 1 to 9.

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