Angle adjusting device, armrest and seat

Abstract

The utility model discloses an angle adjusting device, a handrail and a seat, and the angle adjusting device comprises a fixed disc, a movable disc and a movable disc, the first rotating disc is rotationally arranged on the fixed disc, and a stepping rotating structure is arranged at the joint of the first rotating disc and the fixed disc; the two ends of the reset torsion spring are connected with the fixed disc and the first rotating disc correspondingly, and a rotating separation structure is arranged between the fixed disc and the first rotating disc; wherein the first rotating disc and the fixed disc rotate by a preset angle, and the stepping rotating structure is disconnected by rotating the separating structure; the first rotating disc is driven by the reset torsion spring to rotate and reset, and the first rotating disc and the fixed disc reestablish a stepping rotating structure. The rotating structure matching mode is optimized, the first rotating disc rotating in a stepping mode triggers the rotating separation structure in the rotating process, then the first rotating disc reversely rotates to the initial position through the reset torsion spring, the structure is simple and compact, and the size is small.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission design, in particular to an angle adjustment device, an armrest with the angle adjustment device, and a seat with the angle adjustment device. Background Art

[0002] The angle setting of the seat armrest is an important parameter for seat comfort. For example, if the armrest is too high, the upper arms will be forced to lift up, which will easily cause fatigue; if the armrest is too low, the upper body will need to lean forward to maintain balance, which will not only easily cause fatigue but also affect breathing.

[0003] Most of the existing chair armrests are fixed to the chair, which is difficult to meet the needs of different users and different occasions, because the proper adjustment of the angle of the armrest helps to maintain the correct body posture and balance, and can place the upper limbs in a comfortable position. In some related technologies, the armrests of the chair only have two states: flat use and folded, that is, the armrests can only stay in two positions relative to the chair, and cannot be constantly tilted between the two positions. This kind of armrest is not user-friendly, people cannot adjust the armrest to a comfortable angle for hand placement, and it is difficult to meet the needs of different people. In some related technologies, the armrest has multiple angle gears, but its internal structure is relatively complex. For example, a ratchet claw or other angle rotation structure is used to prevent the armrest from returning to a certain gear. In addition, an angle reset structure is set outside the angle rotation structure, and the overall structure is bloated, the volume occupied is large, the connection stability is poor, and the stability of the user's arm support is poor. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an angle adjustment device, which has a simple structure, a small volume and a high connection strength.

[0005] The utility model also provides an armrest with the above-mentioned angle adjustment device, and a seat with the above-mentioned angle adjustment device.

[0006] An angle adjustment device according to the utility model comprises:

[0007] Fixed plate;

[0008] A first rotating disk, rotatably disposed on the fixed disk, wherein a stepping rotating structure is disposed at a junction of the first rotating disk and the fixed disk;

[0009] a return torsion spring, wherein two ends of the return torsion spring are respectively connected to the fixed disk and the first rotating disk, and a rotation separation structure is provided between the fixed disk and the first rotating disk;

[0010] The first rotating disk and the fixed disk rotate at a preset angle, and the stepping rotating structure is disconnected through the rotating separation structure; the first rotating disk is driven to rotate and reset through the reset torsion spring, and the first rotating disk and the fixed disk re-establish the stepping rotating structure.

[0011] An angle adjustment device according to the utility model has at least the following beneficial effects: a step-by-step rotation structure enables the first rotating disk to rotate to multiple gears, and then continue to rotate after rotating to the last gear, and a rotating separation structure separates the first rotating disk from the fixed disk, and then a reset torsion spring resets the first rotating disk to the initial angle; the structural coordination mode of the rotation is optimized, and the step-by-step rotating first rotating disk triggers the rotating separation structure during rotation, and then rotates back to the initial position through the reset torsion spring, and the structure is simple, compact and small in size.

[0012] According to an angle adjustment device described in the utility model, the stepping rotation structure includes a compression spring, a transmission protrusion and a transmission groove. There are multiple transmission grooves, and the multiple transmission grooves are arranged on the fixed disk at equal distances along the circumference of the fixed disk. The transmission protrusion is set on the first rotating disk, and the transmission protrusion is suitable for engaging with adjacent transmission grooves in sequence. One end of the compression spring is fixed, and the other end is connected to and drives the first rotating disk to press against the fixed disk, so as to drive the transmission protrusion to press against the groove wall of the transmission groove.

[0013] According to an angle adjustment device described in the utility model, the transmission protrusion includes a first transmission bevel and a first stop plane, the first transmission bevel is arranged on the side of the transmission protrusion toward the rotation adjustment direction of the first rotating disk, and the first stop plane is arranged on the side of the transmission protrusion away from the rotation adjustment direction of the first rotating disk.

[0014] According to the angle adjustment device described in the utility model, there are multiple transmission protrusions, and the multiple transmission protrusions are evenly arranged on the end surface of the first rotating disk in the circumferential direction, and the transmission protrusions are meshed with the transmission grooves in a one-to-one correspondence.

[0015] According to an angle adjustment device described in the utility model, the rotation separation structure includes a driving block and a blocking block, the driving block is fixedly arranged on the first rotating disk, the blocking block is fixedly arranged on the fixed disk, the blocking block is located on the rotation adjustment path of the driving block, and the blocking block is suitable for cooperating with the driving block to drive the first rotating disk to move along the side away from the fixed disk.

[0016] According to an angle adjustment device described in the utility model, the rotation separation structure also includes a second rotating disk, which is rotatably arranged on the first rotating disk; the second rotating disk is provided with a limiting groove extending around the rotation axis of the first rotating disk, and the driving block is rotatably arranged in the limiting groove, and drives the second rotating disk to rotate by pressing against the groove wall of the limiting groove; the second rotating disk is provided with a driving groove, and the driving groove has a reverse thrust inclined surface, and the reverse thrust inclined surface cooperates with the blocking block to drive the second rotating disk and the first rotating disk to move together along the side away from the fixed disk.

[0017] According to the angle adjustment device described in the utility model, a transfer groove is provided on the end surface of the second rotating disk facing the fixed disk, and a transfer protrusion is provided on the bottom end of the blocking block;

[0018] When the second rotating disk rotates and drives the blocking block to separate from the reverse thrust slope, the second rotating disk continues to rotate, and the transfer protrusion is suitable for being stuck in the transfer groove.

[0019] According to an angle adjustment device described in the utility model, the first rotating disk and the fixed disk are both hollow structures, the middle part of the reset torsion spring is placed in the first rotating disk and the fixed disk, the end surface of the first rotating disk facing away from the fixed disk is provided with a first channel groove, the end surface of the fixed disk facing away from the first rotating disk is provided with a second channel groove, one end of the reset torsion spring is passed through the first channel groove, and the other end is passed through the second channel groove.

[0020] The armrest according to the utility model comprises an angle adjustment device according to the utility model.

[0021] The armrest according to the utility model has at least the following beneficial effects: the structural matching mode of the rotation is optimized, the first rotating disk of the stepping rotation triggers the rotating separation structure during the rotation, and then rotates back to the initial position through the reset torsion spring, the structure is simple and compact, and the volume is small, so that the armrest is more compact in appearance and easier to use.

[0022] The seat according to the utility model comprises an angle adjustment device according to the utility model.

[0023] The seat according to the utility model has at least the following beneficial effects: the cooperation mode of the rotating structure applied to the rotating part of the seat is optimized, the first rotating disk which rotates in steps triggers the rotating separation structure during rotation, and then rotates back to the initial position through the reset torsion spring, the structure is simple and compact, and the volume is small, so that the overall structure of the seat is relatively compact and easier to use.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 This is an exploded view of an angle adjustment device according to an embodiment of the utility model;

[0027] Figure 2 This is an exploded view of the handrail of an embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the cross-sectional structure of the handrail of an embodiment of the utility model;

[0029] Figure 4 This is a schematic diagram of the internal cross-sectional structure of an angle adjustment device in an initial use state according to an embodiment of the utility model;

[0030] Figure 5 The handrail of the utility model embodiment corresponds to Figure 4 Schematic diagram of the location of the state;

[0031] Figure 6 This is a schematic diagram of the internal cross-sectional structure of an angle adjustment device in a rotation adjustment use state according to an embodiment of the utility model;

[0032] Figure 7 The handrail of the utility model embodiment corresponds to Figure 6 Schematic diagram of the location of the state;

[0033] Figure 8 This is a schematic diagram of the internal cross-sectional structure of an angle adjustment device in an embodiment of the utility model in a state of being reset for use;

[0034] Fig. 9 The handrail of the utility model embodiment corresponds to Figure 8 Schematic diagram of the status.

[0035] Description of Figure Numbers:

[0036] Fixed plate 100; transmission groove 101; second channel groove 102; blocking block 110; transfer protrusion 111; fixed protrusion 120; annular positioning protrusion 130;

[0037] First rotating disk 200; first channel groove 201; positioning groove 202; transmission protrusion 210; first transmission inclined surface 211; first stop plane 212; driving block 220; fixing ear 230;

[0038] The second rotating disk 300; the limiting groove 301; the driving groove 302; the reverse thrust inclined surface 3021; ​​the transfer groove 303;

[0039] Reset torsion spring 400;

[0040] Compression spring 510; fixed cover 520; sliding seat 530; fixed sleeve 540; fixing screw 550;

[0041] Rotating seat 600; mounting slot 601; fixing slot 602;

[0042] Fixed seat 700; fixed groove 701; protective retaining ring 710. DETAILED DESCRIPTION

[0043] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., 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 cannot be understood as a limitation on the present invention.

[0045] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0046] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0047] In the description of the utility model, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] The angle setting of the seat armrest is an important parameter for seat comfort. For example, if the armrest is too high, the upper arms will be forced to lift up, which will easily cause fatigue; if the armrest is too low, the upper body will need to lean forward to maintain balance, which will not only easily cause fatigue but also affect breathing.

[0049] Most of the existing chair armrests are fixed to the chair, which is difficult to meet the needs of different users and different occasions, because the proper adjustment of the angle of the armrest helps to maintain the correct body posture and balance, and can place the upper limbs in a comfortable position. In some related technologies, the armrests of the chair only have two states: flat use and folded, that is, the armrests can only stay in two positions relative to the chair, and cannot be constantly tilted between the two positions. This kind of armrest is not user-friendly, people cannot adjust the armrest to a comfortable angle for hand placement, and it is difficult to meet the needs of different people. In some related technologies, the armrest has multiple angle gears, but its internal structure is relatively complex. For example, a ratchet claw or other angle rotation structure is used to prevent the armrest from returning to a certain gear. In addition, an angle reset structure is set outside the angle rotation structure, and the overall structure is bloated, the volume occupied is large, the connection stability is poor, and the stability of the user's arm support is poor.

[0050] For this reason, Figures 1 to 9As shown, an angle adjustment device proposed by the utility model includes a fixed disk 100, a first rotating disk 200 rotatably arranged on the fixed disk 100, and a reset torsion spring 400 whose two ends are respectively connected to the fixed disk 100 and the first rotating disk 200, wherein a stepping rotation structure is provided at the joint of the first rotating disk 200 and the fixed disk 100, for example, the end surface of the first rotating disk 200 is meshed and connected with the end surface of the fixed disk 100. A rotation separation structure is provided between the fixed disk 100 and the first rotating disk 200. For example, after the first rotating disk directly idles at a preset angle, a connection is established between the first rotating disk and the fixed disk by using an inclined transmission match, so that the first rotating disk that rotates at a preset angle can establish a transmission connection with the fixed disk (not shown in the figure). Alternatively, the first rotating disk 200 and the fixed disk 100 form a rotating separation structure through the second rotating disk 300. For example, the first rotating disk 200 and the second rotating disk 300 are matched with arc notches, the first rotating disk 200 rotates at a preset angle to connect and drive the second rotating disk 300 to rotate, the second rotating disk 300 and the fixed disk 100 are matched with an inclined transmission, and drive the second rotating disk 300 and the first rotating disk 200 to move along the side away from the fixed disk 100 to disconnect the meshing connection between the first rotating disk 200 and the fixed disk 100. In some applications, the first rotating disk 200 and the fixed disk 100 rotate at a preset angle. For example, after the first rotating disk 200 rotates 60°, the rotating separation structure is used to disconnect the stepping rotating structure; the first rotating disk 200 is driven to rotate and reset by the reset torsion spring 400, and the first rotating disk 200 and the fixed disk 100 re-establish the stepping rotating structure. It is easy to understand that the step-by-step rotation structure enables the first rotating disk 200 to rotate to multiple gears, and then continue to rotate after rotating to the last gear, and the rotating separation structure separates the first rotating disk 200 from the fixed disk 100. Then, the reset torsion spring 400 resets the first rotating disk 200 to the initial angle. It should be noted that the structural coordination method of the rotation is optimized, and the step-by-step rotating first rotating disk 200 triggers the rotating separation structure during the rotation, and then rotates in the opposite direction to return to the initial position through the reset torsion spring 400. The structure is simple and compact, and the volume is small.

[0051] In some embodiments of the present invention, refer to Figure 1 and Figure 2 A rotation positioning structure is provided between the first rotating disk 200 and the fixed disk 100, so that the two can rotate more stably. The rotation positioning structure can keep the center line of the first rotating disk 200 and the center line of the fixed disk 100 always coincident, and thus, there will be no misalignment after the first rotating disk 200 and the fixed disk 100 are separated, which will make it difficult to re-establish the connection. For example, the fixed disk 100 is provided with an annular positioning protrusion 130, and the first rotating disk 200 is provided with a positioning groove 202. The positioning protrusion and the positioning groove 202 are rotatably matched to directly perform rotation positioning between the first rotating disk 200 and the fixed disk 100.

[0052] In some embodiments of the present invention, referring to Figures 1 to 3 The stepping rotating structure includes a compression spring 510, a transmission protrusion 210 and a transmission groove 101, wherein there are a plurality of transmission grooves 101, and the plurality of transmission grooves 101 are arranged on the fixed disk 100 at equal intervals along the circumference of the fixed disk 100, and the transmission protrusion 210 is provided on the first rotating disk 200, and the transmission protrusion 210 is adapted to sequentially engage with adjacent transmission grooves 101. In addition, one end of the compression spring 510 is fixed, and the other end is connected to and drives the first rotating disk 200 to press against the fixed disk 100, so as to drive the transmission protrusion 210 to press against the groove wall of the transmission groove 101. It is easy to understand that the meshing connection between the transmission protrusion 210 and the transmission groove 101 can refer to the meshing of two gears. The difference is that the fixed disk 100 is fixed, and the first rotating disk 200 floats along the center line direction of the compression spring 510. When the first transmission disk is meshed and rotated under the action of external force, the compression spring 510 will be compressed. Without the action of external force, the compression spring 510 resets and drives the transmission protrusion 210 to mesh closely with the transmission groove 101. By adopting the meshing connection mode, the stability of the connection between the first rotating disk 200 and the fixed disk 100 is high. In some embodiments, the adjacent transmission grooves 101 are 10° apart in the circumferential direction of the fixed disk 100, and the first rotating disk 200 is adjusted to 10° for each stable rotation relative to the fixed disk 100. In some embodiments, the adjacent transmission grooves 101 are 15° apart in the circumferential direction of the fixed disk 100, and the first rotating disk 200 is adjusted to 15° for each stable rotation relative to the fixed disk 100.

[0053] In some embodiments, there is one transmission protrusion 210, and the transmission groove 101 is arranged at intervals within a certain range of the central angle of the fixed plate 100, so that the transmission connection between the transmission protrusion 210 and the transmission groove 101 can also be achieved. Figure 1 As shown, there are multiple transmission protrusions 210, and the multiple transmission protrusions 210 are evenly arranged on the end surface of the first rotating disk 200. Correspondingly, multiple transmission grooves 101 are evenly arranged on the end surface of the fixed disk 100. The transmission protrusions 210 are meshed with the transmission grooves 101 one by one. Therefore, the strength of the connection between the first rotating disk 200 and the fixed disk 100 is extremely high, and a single transmission protrusion 210 is not easy to collapse and cause connection failure.

[0054] Further, the transmission protrusion 210 includes a first transmission inclined surface 211 and a first stop plane 212, the first transmission inclined surface 211 is arranged on the side of the transmission protrusion 210 facing the rotation adjustment direction of the first rotating disk 200, and the first stop plane 212 is arranged on the side of the transmission protrusion 210 away from the rotation adjustment direction of the first rotating disk 200. Reference may be made to the ratchet structure. It should be noted that when applied to the handrail, the rotation adjustment direction of the first rotating disk 200 is the direction in which the angle between the handrail and the horizontal plane gradually increases when the first rotating disk 200 rotates relative to the fixed disk 100, and the other opposite direction is the rotation reset direction, that is, the direction in which the first rotating disk 200 is driven to rotate under the action of the reset torsion spring 400 after the first rotating disk 200 and the fixed disk 100 are in the disconnected step rotation structure, that is, the direction in which the handrail rotates downward and the angle between the handrail and the horizontal plane gradually decreases. For example, the rotation adjustment direction is the direction in which the first rotating disk 200 rotates clockwise; the rotation reset direction is the direction in which the first rotating disk 200 rotates counterclockwise. Among them, the shape of the transmission protrusion 210 is designed, which is different from the conventional triangular protrusion. The conventional triangular protrusion can rotate clockwise and counterclockwise without restriction. Through the design of the first transmission bevel 211 and the first stop plane 212, the first rotating disk 200 has a one-way rotation adjustment function, which is suitable for the use scenario of the armrest. The armrest is used to support the arm. Correspondingly, the first rotating disk 200 will not rotate when the armrest supports the arm. When the angle of the armrest needs to be adjusted, the hand can directly pull the armrest upward to adjust it. It is easy to understand that the transmission groove 101 is provided with a second transmission bevel and a second stop plane, the second transmission bevel corresponds to the first transmission bevel 211, and the second stop plane corresponds to the first stop plane 212.

[0055] In some embodiments of the utility model, the first rotating disk and the fixed disk directly cooperate to form a rotation separation structure (not shown in the figure). Specifically, the rotation separation structure includes a driving block and a blocking block. The driving block is fixedly arranged on the first rotating disk, and the blocking block is fixedly arranged on the fixed disk. The blocking block is located on the rotation adjustment path of the driving block, and the blocking block is suitable for cooperating with the driving block to drive the first rotating disk to move along the side away from the fixed disk. However, the stepping rotation structure and the rotation separation structure are directly arranged on the two parts of the first rotating disk and the fixed disk at the same time, and the stepping rotation structure and the rotation separation structure will interfere with each other. For example, the first rotating disk separates itself from the fixed disk during rotation, but the gradual separation will weaken the rotation cooperation between the first rotating disk and the fixed disk, so that the first rotating disk cannot be completely separated from the fixed disk. In some embodiments of the utility model, such as Figures 4 to 9As shown, the first rotating disk 200 and the fixed disk 100 are respectively matched with another part to form a rotating separation structure. Specifically, the rotating separation structure includes a second rotating disk 300 rotatably arranged on the first rotating disk 200, and the second rotating disk 300 is provided with a driving groove 302, and the driving groove 302 is transmission-connected with the blocking block 110. Among them, the second rotating disk 300 is provided with a limiting groove 301 extending around the rotation axis of the first rotating disk 200, and the driving block 220 is rotatably arranged in the limiting groove 301, and drives the second rotating disk 300 to rotate by pressing the groove wall of the limiting groove 301. It is easy to understand that, in the initial use state, the driving block 220 abuts against the side wall of one end of the limiting groove 301; in the rotation adjustment use state, the driving block 220 moves toward the other end of the side wall of the limiting groove 301. At this time, the blocking block 110 is embedded in the driving groove 302, and the second rotating disk 300 does not rotate; when continuing to rotate and entering the reset state, the driving block 220 presses against the side wall of the limiting groove 301 and drives the second rotating disk 300 to rotate. The driving groove 302 has a reverse thrust slope 3021, and the reverse thrust slope 3021 cooperates with the blocking block 110 to drive the second rotating disk 300 and the first rotating disk 200 to move together along the side away from the fixed disk 100. Optionally, the circumferential extension angle of the limit groove 301 along the second rotating disk 300 is 60°, that is, the maximum adjustable angle of the first rotating disk 200 relative to the fixed disk 100 is 60°. At this time, if the distance between adjacent transmission grooves 101 is 15°, the first rotating disk 200 has 4 rotation gears. After the 4 rotation gears are adjusted, continue to rotate the first rotating disk 200, and the first rotating disk 200 will be reset. Furthermore, in some embodiments of the utility model, before resetting, the first rotating disk 200 has a stationary position state, specifically, the end face of the second rotating disk 300 facing the fixed disk 100 is provided with a transfer groove 303, and the bottom end of the blocking block 110 is provided with a transfer protrusion 111; when the second rotating disk 300 rotates and drives the blocking block 110 to separate from the reverse thrust slope 3021, the second rotating disk 300 continues to rotate, and the transfer protrusion 111 is suitable for being stuck in the transfer groove 303, which can provide the user with a mechanical feedback of entering the reset, thereby improving the user's operability and playability.

[0056] Reference Figure 2In some embodiments of the utility model, the reset torsion spring 400 adopts a built-in design, and the structure is more compact. Specifically, the first rotating disk 200 and the fixed disk 100 are both hollow structures, and the middle part of the reset torsion spring 400 is placed in the first rotating disk 200 and the fixed disk 100. In addition, the end surface of the first rotating disk 200 away from the fixed disk 100 is provided with a first channel groove 201, and the end surface of the fixed disk 100 away from the first rotating disk 200 is provided with a second channel groove 102. One end of the reset torsion spring 400 is penetrated in the first channel groove 201, and the other end is penetrated in the second channel groove 102. Therefore, the end of the reset torsion spring 400 is not exposed, and the end surfaces of the first rotating disk 200 and the second rotating disk 300 are convenient for continuing to fit and install other parts, and are connected and used with various structures that require rotational cooperation.

[0057] Reference Figures 1 to 9 The armrest according to the embodiment of the utility model includes an angle adjustment device according to the embodiment of the utility model, and also includes a rotating seat 600 and a fixing seat 700, wherein the fixing plate 100 is fixedly connected with the fixing seat 700, for example, the fixing plate 100 is provided with a fixing protrusion 120, and the fixing seat 700 is provided with a fixing groove 602, and the fixing protrusion 120 is plugged and fixed with the fixing groove 602. Figures 1 to 3 The rotating seat 600 is rotatably mounted on the fixed seat 700. The rotating seat 600 is provided with a mounting groove 601 and a fixing groove 602 that are interconnected. The first rotating disk 200 is mounted on the mounting groove 601 and slidably cooperates with the mounting groove 601. In addition, the first rotating disk 200 is provided with a fixing ear 230. The fixing ear 230 matches the shape of the fixing groove 602, so that the first rotating disk 200 and the rotating seat 600 can rotate together. In some embodiments, the rotating seat 600 is fixedly mounted with a fixing cover 520, and the compression spring 510 is placed in the mounting groove 601. One end of the compression spring 510 is pressed and connected to the fixing cover 520, and the other end is pressed and connected to the first rotating disk 200. Specifically, the fixing cover 520 is installed at one end of the mounting groove 601, and the fixing sleeve 540 is installed at the other end of the mounting groove 601. The angle adjustment device is arranged between the fixing cover 520 and the fixing sleeve 540. The fixing screw 550 is passed through the fixing cover 520, the compression spring 510, the first rotating disk 200, the second rotating disk 300, the fixing disk 100, the return torsion spring 400 and the middle part of the fixing sleeve 540, and is fixed to the rotating seat 600 by a nut at the end of the fixing screw 550.

[0058] In some embodiments of the present invention, in addition to providing the annular positioning protrusion 130 and the positioning groove 202, the first rotating disk 200 and the fixed disk 100 are directly rotationally positioned. In some embodiments, the rotating seat 600 is rotatably mounted on the fixed sleeve 540, which indirectly plays a role in the rotational positioning between the first rotating disk 200 and the fixed disk 100. In some embodiments, the rotating seat is rotatably mounted in the mounting groove (not shown in the figure), which indirectly plays a role in the rotational positioning between the first rotating disk and the fixed disk.

[0059] In some other embodiments, a protective retaining ring 710 is provided in the mounting groove 601, and the protective retaining ring 710 is provided around the junction of the transmission protrusion 210 and the transmission groove 101, so as to prevent dust or particles from entering the junction of the transmission protrusion 210 and the transmission groove 101, reduce wear and tear, and improve service life. Further, a sliding seat 530 is provided between the first rotating disk 200 and the fixed cover 520, and the first rotating disk is installed on the sliding seat 530, and the two ends of the compression spring 510 are respectively in contact with the sliding seat 530 and the fixed cover 520. On the one hand, the sliding seat 530 can play a correction and buffering role to a certain extent, so as to avoid the compression spring 510 directly pushing the first rotating disk 200, which causes the first rotating disk 200 to be unevenly stressed and stuck; on the other hand, after the first rotating disk 200 is installed on the sliding seat 530, the partial return torsion spring 400 located in the first channel groove 201 can be safely hidden, and the compression spring 510 can directly push the smooth surface of the sliding seat 530, which has a better pushing effect on the sliding seat 530.

[0060] Other structures and operations of the armrest according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0061] According to the seat of the embodiment of the utility model, by adopting an angle adjustment device of the embodiment of the utility model, the cooperation mode of the rotating structure applied to the rotating part of the seat is optimized, the first rotating disk 200 which rotates in steps triggers the rotating separation structure during rotation, and then rotates back to the initial position through the reset torsion spring 400. The structure is simple and compact, and the volume is small. Therefore, the overall structure of the seat is relatively compact and easier to use.

[0062] Other structures and operations of the seat according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0063] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An angle adjustment device, It is characterized in that include: Fixed plate; A first rotating disk, rotatably disposed on the fixed disk, wherein a stepping rotating structure is disposed at a junction of the first rotating disk and the fixed disk; a return torsion spring, wherein two ends of the return torsion spring are respectively connected to the fixed disk and the first rotating disk, and a rotation separation structure is provided between the fixed disk and the first rotating disk; Wherein, the first rotating disk and the fixed disk rotate at a preset angle, and the step-by-step rotating structure is disconnected through the rotating separation structure; The first rotating disk is driven to rotate and reset by the reset torsion spring, and the first rotating disk and the fixed disk re-establish the stepping rotation structure.

2. An angle adjustment device according to claim 1, Features: The stepping rotation structure includes a compression spring, a transmission protrusion and a transmission groove. There are multiple transmission grooves, and the multiple transmission grooves are arranged on the fixed disk at equal intervals along the circumference of the fixed disk. The transmission protrusion is set on the first rotating disk, and the transmission protrusion is suitable for engaging with adjacent transmission grooves in sequence. One end of the compression spring is fixed, and the other end is connected to and drives the first rotating disk to press against the fixed disk, so as to drive the transmission protrusion to press against the groove wall of the transmission groove.

3. An angle adjustment device according to claim 2, Features: The transmission protrusion includes a first transmission inclined surface and a first stop plane. The first transmission inclined surface is arranged on the side of the transmission protrusion facing the rotation adjustment direction of the first rotating disk, and the first stop plane is arranged on the side of the transmission protrusion away from the rotation adjustment direction of the first rotating disk.

4. An angle adjustment device according to claim 2, Features: There are a plurality of transmission protrusions, and the plurality of transmission protrusions are evenly arranged on the end surface of the first rotating disk in the circumferential direction, and the transmission protrusions are meshed with the transmission grooves in a one-to-one correspondence.

5. An angle adjustment device according to claim 1, Features: The rotation separation structure includes a driving block and a blocking block, wherein the driving block is fixedly disposed on the first rotating disk, the blocking block is fixedly disposed on the fixed disk, the blocking block is located on a rotation adjustment path of the driving block, and the blocking block is suitable for cooperating with the driving block to drive the first rotating disk to move along a side away from the fixed disk.

6. An angle adjustment device according to claim 5, Features: The rotating separation structure also includes a second rotating disk, which is rotatably arranged on the first rotating disk; the second rotating disk is provided with a limiting groove extending around the rotation axis of the first rotating disk, and the driving block is rotatably arranged in the limiting groove, and drives the second rotating disk to rotate by pressing the groove wall of the limiting groove; the second rotating disk is provided with a driving groove, and the driving groove has a reverse thrust inclined surface, and the reverse thrust inclined surface cooperates with the blocking block to drive the second rotating disk and the first rotating disk to move together along the side away from the fixed disk.

7. An angle adjustment device according to claim 6, Features: The end surface of the second rotating disk facing the fixed disk is provided with a transfer groove, and the bottom end of the blocking block is provided with a transfer protrusion; When the second rotating disk rotates and drives the blocking block to separate from the reverse thrust slope, the second rotating disk continues to rotate, and the transfer protrusion is suitable for being stuck in the transfer groove.

8. An angle adjustment device according to claim 1, Features: The first rotating disk and the fixed disk are both hollow structures, the middle part of the return torsion spring is placed in the first rotating disk and the fixed disk, the end surface of the first rotating disk facing away from the fixed disk is provided with a first channel groove, the end surface of the fixed disk facing away from the first rotating disk is provided with a second channel groove, one end of the return torsion spring is passed through the first channel groove, and the other end is passed through the second channel groove.

9. Handrails, Features: It comprises an angle adjustment device as claimed in any one of claims 1 to 8.

10. Seats, Features: It comprises an angle adjustment device as claimed in any one of claims 1 to 8.

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