Stepless-adjustable angle device and side armrest, seat and rotary screen applying same
By adding lubrication components to the angle adjustment device, the problem of narrow and rotation in existing technologies has been solved, and the effects of non -pole adjustment and high comfort in multiple scenarios are achieved.
Patent Information
- Application Number
- CN202420934165.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing angle adjustment device has a narrow range of application outside the dual-use application scenarios, and it is prone to axial shaking and noise during rotation, affecting comfort.
A designed angle device that can be designed. By adding lubricating parts between the inner tooth plate and the outer tooth plate, the axial floating gap is eliminated, the friction coefficient is reduced, and the rotation smoothness is improved.
The influence function in various application scenarios is realized, the axial shaking and noise in the rotation process are eliminated, and the comfort of the device and side armrests is improved.
Smart Images
Figure CN222415817U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of angle adjustment, and in particular to an infinitely adjustable angle device and a side armrest, a seat and a rotating screen using the device. Background Art
[0002] In the existing angle adjustment device, when the sheath wraps the inner and outer tooth plates, a certain axial clearance must be ensured between the inner and outer tooth plates so that the inner and outer tooth plates can rotate relative to each other under a relatively small driving torque. However, this angle adjustment device is only suitable for double-use applications and has a narrow application range. Utility Model Content
[0003] The purpose of the present application is to provide an infinitely adjustable angle device, a side armrest, a seat and a rotating screen. The infinitely adjustable angle device is not limited to the application scenario of double use, but has a wide range of applications.
[0004] In order to solve the above technical problems, the present application provides an infinitely adjustable angle device, including an inner tooth plate, an outer tooth plate and a sleeve, the inner tooth plate and the outer tooth plate are both placed inside the sleeve, the outer tooth plate and the sleeve are fixedly connected, the inner tooth plate is axially located between the outer tooth plate and the limiting end wall of the sleeve, the inner tooth plate and the outer tooth plate can rotate relative to each other, and also includes a lubricating component, the inner tooth plate and the outer tooth plate are axially fitted together through the lubricating component, and the limiting end wall of the sleeve and the inner tooth plate are axially fitted together through the lubricating component.
[0005] The utility model discloses an infinitely adjustable angle device with an additional lubricating component, in which the inner tooth plate and the outer tooth plate are axially fitted together via the lubricating component, and the limiting end wall of the sleeve and the inner tooth plate are axially fitted together via the lubricating component. On the one hand, the axial floating gap between the inner tooth plate and the outer tooth plate and the sleeve is eliminated, thereby avoiding jitter and uneven operation caused by the gap, and improving the comfort of the infinitely adjustable angle device and the side armrest. On the other hand, the lubricating component has a lubricating function, which can reduce the friction coefficient between the relative end walls of the inner tooth plate and the outer tooth plate, and between the limiting end wall of the sleeve and the end wall of the inner tooth plate facing the sleeve, thereby improving the rotation smoothness of the inner tooth plate and ensuring that the driving torque does not increase.
[0006] Optionally, the lubricating component comprises a self-lubricating gasket.
[0007] Optionally, at least one of the relative end walls of the inner tooth plate and the outer tooth plate has a friction-reducing lubricating coating, and at least one of the end wall of the inner tooth plate facing the sleeve and the limiting end wall of the sleeve has a friction-reducing lubricating coating, and the friction-reducing lubricating coating forms the lubricating component.
[0008] The utility model also provides a side armrest, including an armrest body, a seat fixing, and the aforementioned infinitely adjustable angle device, wherein the seat fixing is constructed to be used for connecting to the seat body, and of the inner tooth plate and the outer tooth plate in the infinitely adjustable angle device, the first is directly or indirectly connected to the armrest body, and the second is directly or indirectly connected to the seat fixing.
[0009] The side armrest of the utility model includes the aforementioned infinitely adjustable angle device, and thus has the same technical effect as the aforementioned infinitely adjustable angle device, which will not be described in detail herein.
[0010] Optionally, the number of the steplessly adjustable angle device and the number of the seat fixing component are both one, and the steplessly adjustable angle device and the seat fixing component are arranged on the same side of the armrest body.
[0011] Optionally, an armrest fixing piece is further included, wherein the armrest fixing piece connects the armrest body and the first one of the inner tooth plate and the outer tooth plate.
[0012] Optionally, it further includes a driving mechanism and a transmission connecting rod, wherein the driving mechanism is connected to the steplessly adjustable angle device through the transmission connecting rod to drive the inner tooth plate and the outer tooth plate to rotate relative to each other, and the driving mechanism is detachably mounted on the seat fixing part.
[0013] Optionally, the driving mechanism and the steplessly adjustable angle device are provided with spline holes respectively, and the transmission connecting rod passes through the spline holes in the driving mechanism and the steplessly adjustable angle device and is spline-connected.
[0014] It also includes two limit retaining springs, which are mounted on the transmission connecting rod, one of which is located on the side of the driving mechanism facing away from the steplessly adjustable angle device, and the other limit retaining spring is located on the side of the steplessly adjustable angle device facing away from the driving mechanism.
[0015] The utility model also provides a seat, comprising a seat body and the above-mentioned side armrests, wherein the seat fixing parts in the side armrests are directly or indirectly connected to the seat body.
[0016] The seat of the utility model includes the aforementioned side armrests, and therefore has the same technical effects as the aforementioned side armrests, which will not be described in detail herein.
[0017] The utility model also provides a rotating screen, including a screen body, a fixing part, a rotating part, and the aforementioned infinitely adjustable angle device, wherein the screen body is connected to the rotating part, and the rotating part can realize the folding or unfolding of the screen body under the rotation of the infinitely adjustable angle device, and of the inner tooth plate and the outer tooth plate in the infinitely adjustable angle device, the first one is directly or indirectly connected to the fixing part, and the second one is directly or indirectly connected to the rotating part.
[0018] The rotating screen of the utility model includes the aforementioned infinitely adjustable angle device, and thus has the same technical effect as the aforementioned infinitely adjustable angle device, which will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A schematic structural diagram of a specific embodiment of the steplessly adjustable angle device provided by the utility model;
[0020] Figure 2 for Figure 1 A schematic diagram of the structure of another angle of the infinitely adjustable angle device;
[0021] Figure 3 for Figure 1 Split diagram of the infinitely adjustable angle device;
[0022] Figure 4 for Figure 1 A schematic diagram of the structure of the inner tooth plate in the steplessly adjustable angle device;
[0023] Figure 5 for Figure 1 A schematic diagram of the structure of the driving components in the steplessly adjustable angle device;
[0024] Figure 6 for Figure 1 Position state diagram of the eccentric component in the infinitely adjustable angle device;
[0025] Figure 7 for Figure 1 A simplified structural diagram of a planetary gear mechanism with a small tooth difference in an infinitely adjustable angle device;
[0026] Figure 8 This is a structural schematic diagram of a specific embodiment of the side armrest provided by the utility model;
[0027] Fig. 9 for Figure 1 Split diagram of the side armrest;
[0028] in, Figure 1-Figure 9 The reference numerals in the figures are as follows:
[0029] 1-infinitely adjustable angle device; 11-inner tooth plate; 11a-inner tooth ring; 11b-shaft shoulder; 12-outer tooth plate; 12a-outer tooth ring; 12b-axial center hole; 13-sheath; 13A-limiting end wall; 14-self-lubricating gasket; 15-wedge block; 16-wedge spring; 17-driving component; 171-cam; 172-rotating shaft; 172a-slot; 173-driving arm; 18-sealing ring; 19-gasket; 110-elastic retaining ring; A-accommodating area;
[0030] 2-handrail body;
[0031] 3- Seat fixings;
[0032] 4-Handrail fixings;
[0033] 5- driving mechanism;
[0034] 6- Transmission connecting rod;
[0035] 7-limiting retaining spring;
[0036] O-spline hole. DETAILED DESCRIPTION
[0037] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0038] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.
[0039] Please refer to Figure 1-Figure 3 , Figure 1 A schematic structural diagram of a specific embodiment of the steplessly adjustable angle device provided by the utility model; Figure 2 for Figure 1 A schematic diagram of the structure of another angle of the infinitely adjustable angle device; Figure 3 for Figure 1 Detailed illustration of the infinitely adjustable angle device.
[0040] The utility model provides an infinitely adjustable angle device 1, comprising an inner tooth plate 11, an outer tooth plate 12 and a sleeve 13, wherein the inner tooth plate 11 and the outer tooth plate 12 are both placed inside the sleeve 13, the outer tooth plate 12 and the sleeve 13 are fixedly connected, the inner tooth plate 11 is axially located between the outer tooth plate 12 and a limiting end wall 13A of the sleeve 13, the inner tooth plate 11 and the outer tooth plate 12 can rotate relatively, and further comprises a lubricating component, the inner tooth plate 11 and the outer tooth plate 12 are axially fitted together via the lubricating component, and the limiting end wall 13A of the sleeve 13 and the inner tooth plate 11 are axially fitted together via the lubricating component.
[0041] In the utility model, the inner tooth plate 11 and the outer tooth plate 12 are both wrapped inside the sheath 13, in order to ensure the structural strength of the infinitely adjustable angle device 1, the outer tooth plate 12 and the sheath 13 are fixedly connected, the inner tooth plate 11 is axially located between the outer tooth plate 12 and the limiting end wall 13A of the sheath 13, and the limiting end wall 13A of the sheath 13 and the outer tooth plate 12 can realize the axial limitation of the inner tooth plate 11. In order to realize the relative rotation of the inner and outer tooth plates under a small driving torque, the prior art needs to ensure that the inner tooth plates have a certain axial clearance when the sheath wraps the inner and outer tooth plates. In the current application scenario of double use, such as when applied to the side armrest, there is no sense of axial clearance. However, the utility model proposes for the first time that the side armrest can be provided with a single infinitely adjustable angle device 1 to realize angle adjustment. At this time, the structure of the traditional infinitely adjustable angle device will cause the side armrest to shake axially during the rotation process, and even generate noise, which has an adverse effect on the comfort of the side armrest.
[0042] Based on this, the utility model provides an additional lubricating component for the infinitely adjustable angle device 1, through which the inner tooth plate 11 and the outer tooth plate 12 are axially fitted, and the limiting end wall 13A of the sleeve 13 and the inner tooth plate 11 are axially fitted. On the one hand, the axial floating gap of the inner tooth plate 11 between the outer tooth plate 12 and the sleeve 13 is eliminated, thereby avoiding the uneven running jitter caused by the gap, and improving the comfort of the infinitely adjustable angle device 1 and the side armrest; on the other hand, the lubricating component has a lubricating function, which can reduce the friction coefficient between the relative end walls of the inner tooth plate 11 and the outer tooth plate 12, and between the limiting end wall 13A of the sleeve 13 and the end wall of the inner tooth plate 11 facing the sleeve 13, thereby improving the rotation smoothness of the inner tooth plate 11 and ensuring that the driving torque does not increase.
[0043] Depend on Figure 3 It can be seen that in this embodiment, the lubricating component includes a self-lubricating gasket 14 .
[0044] As configured above, the utility model steplessly adjustable angle device 1 comprises two self-lubricating gaskets 14. In the installed state, one of the self-lubricating gaskets 14 is installed between the inner tooth plate 11 and the outer tooth plate 12, and the opposite end walls of the inner tooth plate 11 and the outer tooth plate 12 are axially fitted together by the self-lubricating gasket 14; the other self-lubricating gasket 14 is installed between the limiting end wall 13A of the sleeve 13 and the inner tooth plate 11, and the limiting end wall 13A of the sleeve 13 and the end wall of the inner tooth plate 11 facing the sleeve 13 are axially fitted together by the self-lubricating gasket 14, so as to eliminate the axial gap between the inner tooth plate 11 and the sleeve 13, which can ensure that the inner and outer teeth are in a stable state. The plates can rotate relative to each other more smoothly, and the axial swing gap of the infinitely adjustable angle device 1 can be eliminated, thereby avoiding jitter and uneven operation caused by the gap, reducing the rotation noise of the infinitely adjustable angle device 1, and effectively improving the comfort of the infinitely adjustable angle device 1; at the same time, the self-lubricating gasket 14 has a self-lubricating function, which can reduce the friction coefficient between the relative end walls of the inner tooth plate 11 and the outer tooth plate 12, and between the limiting end wall 13A of the sleeve 13 and the end wall of the inner tooth plate 11 facing the sleeve 13, thereby eliminating the axial floating gap between the inner tooth plate 11 and the sleeve 13 and ensuring that the driving torque does not increase.
[0045] In addition, by adding the above-mentioned self-lubricating gasket 14, it is possible to expand the application scenarios of the existing steplessly adjustable angle device 1 and improve the utilization rate of the steplessly adjustable angle device 1 without improving the structure of the existing steplessly adjustable angle device 1.
[0046] In practice, in addition to the structural form of the above-mentioned self-lubricating gasket 14, the lubricating component has at least one of the opposite end walls of the inner tooth plate 11 and the outer tooth plate 12 with a friction-reducing lubricating coating, and at least one of the end wall of the inner tooth plate 11 facing the sleeve 13 and the limiting end wall 13A of the sleeve 13 with a friction-reducing lubricating coating. The friction-reducing lubricating coating forms a lubricating component, which can also achieve the technical effect of the above-mentioned self-lubricating gasket 14.
[0047] In practice, the anti-friction lubricating coating can be formed at a desired position by spraying, bonding, deposition, etc. The specific material of the anti-friction lubricating coating is well known to those skilled in the art and will not be described in detail here.
[0048] Please continue to refer to Figure 1-7 , Figure 4 for Figure 1 A schematic diagram of the structure of the inner tooth plate in the steplessly adjustable angle device; Figure 5 for Figure 1 A schematic diagram of the structure of the driving components in the steplessly adjustable angle device; Figure 6 for Figure 1 Position state diagram of the eccentric component in the infinitely adjustable angle device; Figure 7 for Figure 1 Schematic diagram of the structure of a planetary gear mechanism with a small tooth difference in an infinitely adjustable angle device.
[0049] In the utility model, the infinitely adjustable angle device 1, the inner gear plate 11 has an inner gear ring 11a, the outer gear plate 12 has an outer gear ring 12a, the inner gear plate 11 is provided with a shaft shoulder 11b, the outer gear plate 12 is provided with an axial center hole 12b, the inner gear ring 11a and the outer gear ring 12a have a difference in the number of teeth, after assembly, the inner gear ring 11a and the outer gear ring 12a are meshed, the shaft shoulder 11b is inserted in the axial center hole 12b, and the shaft shoulder 11b is eccentrically arranged relative to the axial center hole 12b, that is, a radial eccentric area is formed between the shaft shoulder 11b and the axial center hole 12b;
[0050] It also includes two wedge blocks 15 and a wedge spring 16. The wedge block 15 is placed in the radial eccentric area as an eccentric component. The wedge block 15, the inner gear ring 11a and the outer gear ring 12a constitute a planetary gear transmission mechanism with a small tooth difference. The elastic deformation energy generated by the pre-compression of the wedge spring 16 acts on the symmetrically arranged wedge blocks 15, so that the wedge blocks 15 rotate circumferentially toward the small diameter section of the eccentric area until they are in a wedging state, thereby eliminating the meshing clearance between the inner gear ring 11a and the outer gear ring 12a.
[0051] Furthermore, the infinitely adjustable angle device 1 of the utility model also includes a driving component 17, which includes a cam 171, a rotating shaft 172 and two driving arms 173. The rotating shaft 172 passes through the inner hole of the sealing ring 18, the inner hole of the wedge block 15, the center hole of the inner tooth plate 11, and the sleeve 13 in sequence. The gasket 19 and the elastic retaining ring 110 are clamped in the groove 172a at the protruding end of the rotating shaft 172. The gasket 19 is assembled between the elastic retaining ring 110 and the end face of the center hole of the inner tooth plate 11, and cooperates with the elastic retaining ring 110 to prevent the driving component 17 from falling off axially.
[0052] There is an accommodating area A between the wedge block 15, the center hole of the inner tooth plate 11, and the axial hole 12b of the outer tooth plate 12. In the installed state, the driving arm 173 is placed in the accommodating area A. When the operating torque acts on the driving component 17, the driving arm 173 drives the wedge block 15. The wedge block 15 drives the inner tooth plate 11 and the outer tooth plate 12 to perform relative rotational motion through eccentric wedging, thereby achieving the purpose of adjusting the angle.
[0053] Please refer to Figure 8-Figure 9 , Figure 8 This is a structural schematic diagram of a specific embodiment of the side armrest provided by the utility model; Fig. 9 for Figure 1 Split diagram of the side armrest.
[0054] The utility model also provides a side armrest, including an armrest body 2, a seat fixing part 3, and the aforementioned infinitely adjustable angle device 1, the seat fixing part 3 is constructed to be used for connecting to the seat body, and of the inner tooth plate 11 and the outer tooth plate 12 in the infinitely adjustable angle device 1, the first one is directly or indirectly connected to the armrest body 2, and the second one is directly or indirectly connected to the seat fixing part 3.
[0055] The side armrest of the utility model includes the aforementioned infinitely adjustable angle device 1, and thus has the same technical effect as the aforementioned infinitely adjustable angle device 1, which will not be described in detail herein.
[0056] It can be seen that in this embodiment, the number of the infinitely adjustable angle device 1 and the seat fixing component 3 are both one, and the infinitely adjustable angle device 1 and the seat fixing component 3 are arranged on the same side of the armrest body 2 .
[0057] Traditional side armrests are adjusted in angle by means of two infinitely adjustable angle devices 1, which are larger in size and require a larger space, and are usually suitable for application scenarios in the middle and rear seats. The side armrests of this embodiment are adjusted in angle by means of one infinitely adjustable angle device 1, and are smaller in size and require a smaller space, and are used in front seats for the first time.
[0058] Please continue to refer to Figure 8-Figure 9 The side armrest of the utility model further includes an armrest fixing member 4 , which connects the first one of the inner tooth plate 11 and the outer tooth plate 12 with the armrest body 2 .
[0059] In this way, the armrest fixing member 4 can serve as a transition structure between the first one of the inner tooth plate 11 and the outer tooth plate 12 and the armrest body 2 , thereby achieving an indirect connection between the first one of the inner tooth plate 11 and the outer tooth plate 12 and the armrest body 2 .
[0060] In practice, the armrest fixing member 4 and the armrest body 2 can be fixed by welding, and the armrest fixing member 4 and the first of the inner tooth plate 11 and the outer tooth plate 12 can also be fixed by welding, and the connection is reliable.
[0061] Furthermore, in practice, it is also feasible to directly weld and fix the first one of the inner tooth plate 11 and the outer tooth plate 12 to the armrest body 2 .
[0062] Furthermore, the side armrest also includes a driving mechanism 5 and a transmission link 6. The driving mechanism 5 is connected to the steplessly adjustable angle device 1 through the transmission link 6 to drive the inner tooth plate 11 and the outer tooth plate 12 to rotate relative to each other. The driving mechanism 5 is detachably mounted on the seat fixing part 3.
[0063] In this way, the seat fixing part 3 is not only used to connect the seat body, but also provides an installation position for the drive mechanism 5; the drive mechanism 5 is detachably installed on the seat fixing part 3, specifically, it can be fixed by bolts, which is convenient for loading and unloading, and convenient for replacing the drive mechanism 5.
[0064] like Fig. 9 As shown, the driving mechanism 5 and the steplessly adjustable angle device 1 are correspondingly provided with spline holes O, and the transmission link 6 passes through the spline holes O in the driving mechanism 5 and the steplessly adjustable angle device 1 and is spline-connected.
[0065] It also includes two limit clamping springs 7, which are mounted on the transmission connecting rod 6. One of the limit clamping springs 7 is located on the side of the driving mechanism 5 facing away from the infinitely adjustable angle device 1, and the other limit clamping spring 7 is located on the side of the infinitely adjustable angle device 1 facing away from the driving mechanism 5.
[0066] As configured above, the driving mechanism 5 and the steplessly adjustable angle device 1 are connected in a circumferential limit connection via a transmission link 6, and two limit springs 7 realize axial limit connection of the driving mechanism 5 and the steplessly adjustable angle device 1, thereby preventing the transmission link 6 from detaching from the driving mechanism 5 and the steplessly adjustable angle device 1, and ensuring reliable transmission between the driving mechanism 5 and the steplessly adjustable angle device 1.
[0067] Among them, Figure 3 As shown, in the infinitely adjustable angle device 1 , the spline hole O is specifically arranged on the driving component 17 .
[0068] In practice, the driving mechanism 5 may be a driving motor.
[0069] The utility model also provides a seat, comprising a seat body and the above-mentioned side armrests, wherein the seat fixing parts in the side armrests are directly or indirectly connected to the seat body.
[0070] The seat of the utility model includes the aforementioned side armrests, and therefore has the same technical effects as the aforementioned side armrests, which will not be described in detail herein.
[0071] The utility model also provides a rotating screen, including a screen body, a fixing part, a rotating part, and the aforementioned infinitely adjustable angle device, the screen body is connected to the rotating part, and the rotating part can realize the folding or unfolding of the screen body under the rotation of the infinitely adjustable angle device. Among the inner tooth plate 11 and the outer tooth plate 12 in the infinitely adjustable angle device 1, the first one is directly or indirectly connected to the fixing part, and the second one is directly or indirectly connected to the rotating part.
[0072] The rotating screen of the utility model includes the aforementioned infinitely adjustable angle device, and thus has the same technical effect as the aforementioned infinitely adjustable angle device, which will not be described in detail herein.
[0073] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. An infinitely adjustable angle device, characterized in that: The invention comprises an inner tooth plate (11), an outer tooth plate (12) and a sleeve (13), wherein the inner tooth plate (11) and the outer tooth plate (12) are both arranged inside the sleeve (13), the outer tooth plate (12) and the sleeve (13) are fixedly connected, the inner tooth plate (11) is axially located between the outer tooth plate (12) and the limiting end wall (13A) of the sleeve (13), the inner tooth plate (11) and the outer tooth plate (12) are relatively rotatable, and further comprises a lubricating component, the inner tooth plate (11) and the outer tooth plate (12) are axially fitted together via the lubricating component, and the limiting end wall (13A) of the sleeve (13) and the inner tooth plate (11) are axially fitted together via the lubricating component.
2. The steplessly adjustable angle device according to claim 1, characterized in that: The lubricating component comprises a self-lubricating gasket (14).
3. The steplessly adjustable angle device according to claim 1, characterized in that: At least one of the opposite end walls of the inner tooth plate (11) and the outer tooth plate (12) has a wear-reducing lubricating coating, and at least one of the end wall of the inner tooth plate (11) facing the sleeve (13) and the limiting end wall (13A) of the sleeve (13) has a wear-reducing lubricating coating, and the wear-reducing lubricating coating forms the lubricating component.
4. A side armrest, characterized in that: It comprises an armrest body (2), a seat fixing part (3), and the infinitely adjustable angle device (1) as claimed in any one of claims 1 to 3, wherein the seat fixing part (3) is configured to be connected to the seat body, and of the inner tooth plate (11) and the outer tooth plate (12) in the infinitely adjustable angle device (1), the first one is directly or indirectly connected to the armrest body (2), and the second one is directly or indirectly connected to the seat fixing part (3).
5. The side armrest according to claim 4, characterized in that: The number of the steplessly adjustable angle device (1) and the seat fixing component (3) is one, and the steplessly adjustable angle device (1) and the seat fixing component (3) are arranged on the same side of the armrest body (2).
6. The side armrest according to claim 4, characterized in that: It also includes an armrest fixing piece (4), wherein the armrest fixing piece (4) connects the first one of the inner tooth plate (11) and the outer tooth plate (12) with the armrest body (2).
7. The side armrest according to claim 4, characterized in that: It also comprises a driving mechanism (5) and a transmission connecting rod (6), wherein the driving mechanism (5) is connected to the steplessly adjustable angle device (1) via the transmission connecting rod (6) to drive the inner tooth plate (11) and the outer tooth plate (12) to rotate relative to each other, and the driving mechanism (5) is detachably mounted on the seat fixing member (3).
8. The side armrest according to claim 7, characterized in that: The driving mechanism (5) and the steplessly adjustable angle device (1) are provided with spline holes (O) respectively, and the transmission connecting rod (6) passes through the spline holes (O) in the driving mechanism (5) and the steplessly adjustable angle device (1) and is spline-connected. It also includes two limit clamping springs (7), wherein the limit clamping springs (7) are sleeved on the transmission connecting rod (6), wherein one of the limit clamping springs (7) is located on a side of the driving mechanism (5) facing away from the steplessly adjustable angle device (1), and the other limit clamping spring (7) is located on a side of the steplessly adjustable angle device (1) facing away from the driving mechanism (5).
9. A seat, characterized in that: It comprises a seat body and the side armrest according to any one of claims 4 to 8, wherein the seat fixing part (3) in the side armrest is directly or indirectly connected to the seat body.
10. A rotating screen, characterized in that: The invention comprises a screen body, a fixing part, a rotating part, and the infinitely adjustable angle device (1) as claimed in any one of claims 1 to 3, wherein the screen body is connected to the rotating part, and the rotating part can realize the folding or unfolding of the screen body under the rotation of the infinitely adjustable angle device (1), and among the inner tooth plate (11) and the outer tooth plate (12) in the infinitely adjustable angle device (1), the first one is directly or indirectly connected to the fixing part, and the second one is directly or indirectly connected to the rotating part.