Angle adjusting mechanism of seat armrest and seat

Abstract

The utility model discloses an angle adjusting mechanism of a seat armrest and a seat. The angle adjusting mechanism comprises a rotating seat, a mounting seat, a locking block and an elastic piece, the rotating seat comprises a rotating disc; the rotating disc is rotatably connected to the mounting seat through a rotating shaft; a groove and a hanging part are arranged on the turntable; a first pushing part, a plurality of clamping parts and a second pushing part are arranged on the mounting seat; the locking block comprises a first end and a second end and is embedded in the groove, and the second end is provided with a clamping end and a hanging end; the elastic piece provides elastic stress applied to the locking piece. According to the utility model, the locking block plays a locking role between the turntable and the mounting seat, and the locking block can provide a relatively stable clamping force, so that the adjusting mechanism can provide a relatively large downward pressure value for the handrail; when the angle of the handrail is adjusted, the locking block does not generate large resistance to rotation of the handrail, and angle adjustment of the handrail can be completed by easily rotating the handrail only through one-hand operation.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to an angle adjustment mechanism for a seat armrest and a seat. Background Art

[0002] Existing office chairs and gaming chairs are generally equipped with armrests on both sides to support the user's arms and improve comfort. In some high-end chairs, the armrests can usually be adjusted in angle to change the angle between the support surface of the armrest and the horizontal plane to meet the different comfort needs of users.

[0003] In existing chairs with adjustable armrest angles, the armrests of the chair are generally rotatably connected to the mounting base of the chair via a rotating shaft or other structure, and then elastic steel balls or other elastic locking members are set at the position where the mounting base and the armrest cooperate. After the armrest is adjusted to a proper angle, the armrest and the mounting base are locked by means of the elastic steel balls or other elastic locking members. Although this structure can adjust the angle of the armrest, the elastic locking member can only provide damping through the elastic stress it generates. After the armrest is adjusted to a proper angle, the force that the armrest can withstand is relatively small. During use, it is difficult for the armrest to provide good support for the user's hands. In addition, when rotating to adjust the angle of the armrest, the elastic locking member produces a certain resistance to the rotation of the armrest, resulting in inconvenient adjustment of the armrest angle. Utility Model Content

[0004] The utility model aims to provide an angle adjustment mechanism for a seat armrest and a seat, which can make the angle adjustment of the armrest simple and labor-saving, and at the same time enable the armrest to withstand a larger downward pressure after being adjusted to a proper angle.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The angle adjustment mechanism of the seat armrest comprises a rotating seat connected to the armrest, a mounting seat connected to the seat, a locking block and an elastic member;

[0007] The rotating seat comprises a rotating disk, which is rotatably connected to the mounting seat through a rotating shaft; a groove and a hanging part are arranged on the rotating disk; a first pushing part, a plurality of clamping parts and a second pushing part are arranged on the mounting seat, the plurality of clamping parts are arranged along the circumference of the rotating shaft, and the first pushing part and the second pushing part are respectively arranged at two ends of the arrangement track of the plurality of clamping parts;

[0008] The locking block includes a first end and a second end opposite to the first end. The locking block is embedded in the groove of the rotating disk and is configured to be able to swing in the groove to make the second end approach or move away from the rotating shaft, and to be able to move laterally in the groove to make the second end approach or move away from the hanging portion. The second end is provided with a clamping end and a hanging end. The clamping end is used to clamp with one of the clamping portions when the second end swings away from the rotating shaft to limit the freedom of the rotating disk to rotate counterclockwise relative to the mounting seat. The hanging end is used to clamp on the hanging portion when the second end approaches the hanging portion to limit the freedom of the second end to swing away from the rotating shaft.

[0009] When the lock block rotates clockwise to a predetermined position relative to the mounting seat as the rotating disk rotates, the first pushing portion pushes the lock block to move horizontally in the first direction relative to the rotating disk so that the hanging end is hung on the hanging portion and the clamping end is in a separated state from the clamping portion; when the hanging end on the lock block is hung on the hanging portion and the lock block rotates counterclockwise to a predetermined position relative to the mounting seat as the rotating disk rotates, the second pushing portion pushes the lock block to move horizontally in the second direction relative to the rotating disk so that the hanging end on the lock block is separated from the hanging portion;

[0010] The elastic member provides an elastic stress applied to the locking block, which is used to push the second end of the locking block toward the clamping portion when the hanging end is separated from the hanging portion so that the clamping end remains in a state of being clamped with one of the clamping portions.

[0011] Preferably, a mounting groove for the turntable to be embedded is provided on the mounting seat, the mounting groove includes two opposite side walls and a peripheral wall connected between the two side walls, the first pushing portion, multiple clamping portions, and the second pushing portion are all arranged on the peripheral wall; the groove is arranged on one side of the turntable and opposite to one of the side walls.

[0012] Preferably, the groove includes two opposite inner walls and an end wall connected between the two inner walls, the end wall is arranged in an arc shape with a middle portion concave outward, and the hanging portion is arranged between the two inner walls of the groove and at an end opposite to the end wall; the first end of the locking block is arranged in an arc shape with a middle portion convex outward, and the first end of the locking block is embedded in the end wall of the groove so that the second end of the locking block can swing between the two inner walls of the groove, and the locking block can move horizontally between the two inner walls and between the end wall and the hanging portion.

[0013] Preferably, a flange protruding toward the rotating shaft is provided on the turntable, the hanging portion is a hanging table surface on the side of the flange facing away from the second end of the locking block, and the hanging end is a hanging boss protruding from the second end of the locking block to match the hanging table surface; a clamping surface is formed on the side of the flange facing the second end of the locking block, and the clamping surface is used to press against the second end of the locking block when the clamping end is clamped together with any one of the clamping portions to prevent the locking block from moving laterally in the first direction relative to the turntable.

[0014] Preferably, the second end of the locking block is provided with a protrusion protruding toward the outer peripheral edge of the turntable, and the first pushing portion is a first limiting boss protruding from the peripheral wall toward the rotating shaft. When the locking block rotates clockwise to a predetermined position relative to the mounting seat as the turntable rotates, the first limiting boss abuts against the protrusion to push the locking block to move in a first direction relative to the turntable.

[0015] Preferably, the turntable is provided with a first limit end face and a second limit end face staggered along the circumference of the turntable, the first limit end face and the first limit boss form a first limit structure for limiting the maximum counterclockwise rotation angle of the turntable relative to the mounting seat, and a second limit boss is provided on the peripheral wall protruding toward the rotating shaft, the second limit end face and the second limit boss form a second limit structure for limiting the maximum clockwise rotation angle of the turntable relative to the mounting seat.

[0016] Preferably, the second pushing portion is an arcuate guide wall arranged on the peripheral wall, and in the counterclockwise direction, the arcuate guide wall gradually approaches the rotating shaft from one end close to the clamping portion to an end away from the clamping portion, and when the hanging end on the locking block is hung on the hanging portion and the locking block rotates counterclockwise with the turntable relative to the mounting seat to the end of the arcuate guide wall close to the clamping portion, the second end of the locking block abuts against the arcuate guide wall, so that the arcuate guide wall pushes the locking block to move laterally in the second direction relative to the turntable.

[0017] Preferably, the adjustment mechanism of the chair armrest further comprises a matching block which is embedded in the mounting groove in an assembleable manner to be fixed with the mounting seat, and the peripheral wall is located on the matching block.

[0018] Preferably, the clamping end is a clamping flange protruding from the second end of the locking block toward the peripheral wall, the clamping portion is a clamping groove arranged on the peripheral wall, the clamping groove includes a first groove wall extending from the peripheral wall toward a direction away from the rotating shaft, and a second groove wall extending from one end of the first groove wall away from the rotating shaft to the peripheral wall, when the clamping flange is clamped in the clamping groove, the first groove wall is used to support the clamping flange to limit the freedom of the locking block to rotate counterclockwise relative to the mounting seat, and the second groove wall is used to push the clamping flange toward a direction close to the rotating shaft when the locking block rotates clockwise relative to the rotating seat along with the rotating disk;

[0019] And / or, the elastic member is a spring, one end of the spring abuts against the rotating disk, and the other end of the spring abuts against the locking block, so that the second end of the locking block always maintains a tendency to swing toward the clamping portion.

[0020] A seat, comprising the above-mentioned angle adjustment mechanism for the seat armrest.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] The utility model uses the locking block to lock between the turntable and the mounting seat, and the locking block can provide a relatively stable clamping force. The locking block will not become loose due to the large downward pressure of the armrest, resulting in the problem of abnormal downward rotation of the armrest, so that the armrest can provide stable support for the user's arm, that is, the adjustment mechanism of the utility model can provide a large downward pressure value for the armrest; in addition, when the armrest angle needs to be adjusted, it is only necessary to rotate the armrest clockwise or counterclockwise, and the locking block will not produce a large resistance to the rotation of the armrest. The user only needs to operate with one hand and easily rotate the armrest to complete the angle adjustment of the armrest, which makes the angle adjustment of the armrest simple and labor-saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a cross-sectional view of the utility model;

[0025] Figure 3 for Figure 2 Magnified view at A in the middle;

[0026] Figure 4 for Figure 1 The structural diagram of the middle turntable;

[0027] Figure 5 for Figure 1 Structural diagram of the middle locking block;

[0028] Figure 6 for Figure 5 B-direction view;

[0029] Figure 7 for Figure 1 The structural diagram of the matching block in the middle;

[0030] Figure 8-12 It is a schematic diagram of the use state of the utility model. DETAILED DESCRIPTION

[0031] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except for special instructions, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with 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 application, and cannot be understood as limiting the present application.

[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0033] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0034] like Figure 1 , 2 , 3, 4, 5, 6, and 7 show an angle adjustment mechanism for a seat armrest of the utility model, which includes a rotating seat 21, a mounting seat 10, a locking block 30, and a spring 40. The armrest is connected to the rotating seat 21, and the mounting seat 10 is connected to the seat. The rotating seat 21 is connected to the mounting seat 10 and can rotate relative to the mounting seat 10. The locking block 30 cooperates with the spring 40 to lock the rotating seat 21 and the mounting seat 10, thereby achieving the adjustment of the angle of the armrest.

[0035] Specifically, the rotating seat 21 includes a rotating disk 20, and shaft holes are provided at the center of the rotating disk 20 and on the mounting seat 10. A rotating shaft is used to cross the shaft hole 201 of the rotating disk 20 and the shaft hole 101 of the mounting seat 10, so that the rotating disk 20 can be rotatably connected to the mounting seat 10; a groove 22 and a hanging part are provided on one side of the rotating disk 20; a first pushing part, a plurality of clamping grooves 52, and a second pushing part are provided on the mounting seat 10, which are located at the periphery of the rotating disk 20, and the plurality of clamping grooves 52 are arranged along the circumference of the rotating shaft, and the first pushing part and the second pushing part are respectively arranged at the two ends of the arrangement track of the plurality of clamping grooves 52. In other words, the first pushing part, the plurality of clamping grooves 52, and the second pushing part are arranged in a counterclockwise order on the circumference of the rotating shaft.

[0036] The locking block 30 includes a first end 301 and a second end 302 opposite to the first end 301. The locking block 30 is embedded in the groove 22 of the rotating disk 20. The shapes of the locking block 30 and the groove 22 are configured to enable the locking block 30 to swing in the groove 22, thereby enabling the second end 302 of the locking block 30 to approach or move away from the rotating shaft, that is, the freedom of the locking block 30 to swing in the groove 22 enables the second end 302 to approach the card slot 52 or move away from the card slot 52. At the same time, the shapes of the locking block 30 and the groove 22 are also configured to enable the locking block 30 to move laterally inside the groove 22, thereby enabling the second end 302 of the locking block 30 to approach or move away from the hanging portion. When the second end 302 of the lock block 30 is at a position away from the rotating shaft (i.e., close to the slot 52), the second end 302 of the lock block 30 can be clamped in one of the slots 52. At this time, the lock block 30 can be used to limit the freedom of the turntable 20 to rotate counterclockwise relative to the mounting seat 10. When the second end 302 of the lock block 30 is at a position close to the rotating shaft, the lock block 30 no longer limits the freedom of the turntable 20 to rotate counterclockwise relative to the mounting seat 10; when the second end 302 of the lock block 30 is hung on the hanging part, the hanging part and the second end 302 of the lock block 30 cooperate to limit the freedom of the second end 302 of the lock block 30 to swing away from the rotating shaft.

[0037] A clamping end and a hanging end are provided on the second end 302. The clamping end is used to cooperate with the clamping slot 52, so that when the second end 302 is away from the rotating shaft, it is clamped in one of the clamping slots 52 to limit the freedom of the turntable 20 to rotate counterclockwise relative to the mounting seat 10, and when the second end 302 is close to the rotating shaft, the clamping end can be disengaged from the clamping slot 52, and the hanging end is used to be clamped on the hanging part when the second end 302 is close to the hanging part, so that the second end 302 of the locking block 30 is clamped on the hanging part through the clamping end and the hanging part, thereby limiting the freedom of the second end 302 of the locking block 30 to swing in the direction away from the rotating shaft.

[0038] In a preferred embodiment, in order to facilitate the control of the processing accuracy of parts and components and enable the locking block 30 to better cooperate with the mounting base 10 to achieve locking of the turntable 20 and the mounting base 10 and adjustment of the rotation angle of the turntable 20 relative to the mounting base 10, the utility model provides a matching block 50 on the mounting base 10, and the matching block 50 and the mounting base 10 are fixed to the mounting base 10 in an assemblable manner, so that the matching block 50 can be processed separately according to higher processing standards and then assembled to the mounting base 10.

[0039] Specifically, the mounting seat 10 is provided with a mounting groove 11 which is recessed downward from the top thereof, and the mounting groove 11 includes two opposite side walls 12. The matching block 50 is inserted into the mounting groove 11 from the opening at the top of the mounting groove 11 so that the matching block 50 is located between the two side walls 12. The turntable 20 is embedded in the mounting groove 11 and is confined between the two side walls 12. A peripheral wall 51 located outside the periphery of the turntable 20 is formed on the matching block 50, and the peripheral wall 51 is connected between the two side walls 12.

[0040] During installation, first embed the matching block 50 in the mounting groove 11, and use the outer peripheral shape of the matching block 50 to cooperate with the shape of the bottom of the mounting groove 11 to achieve the positioning of the matching block 50 and the mounting seat 10, so as to install the matching block 50 to a predetermined position on the mounting seat 10, and then embed the turntable 20 into the mounting groove 11 from the top opening of the mounting groove 11, and the groove 22 is provided on one side surface of the turntable 20 so that the groove 22 is opposite to a side wall 12 of the mounting groove 11, and then use the rotating shaft to cross the axial hole 101 of the mounting seat 10 and the axial hole 201 of the turntable 20 to connect the turntable 20 and the mounting seat 10 together.

[0041] The above-mentioned first pushing portion, multiple slots 52, and second pushing portion are all arranged on the peripheral wall 51 of the matching block 50. Specifically, the first pushing portion is a first limiting boss 53 protruding from the peripheral wall 51 toward the rotating shaft, and the second end 302 of the locking block 30 is provided with a protrusion 33 protruding toward the outer peripheral edge of the turntable 20.

[0042] When the rotary disk 20 rotates counterclockwise, the rotary disk 20 drives the locking block 30 to rotate around the rotating shaft. When the rotary disk 20 rotates counterclockwise to a predetermined position, the first limiting boss 53 contacts the protrusion 33 and blocks the protrusion 33 from continuing to rotate counterclockwise with the rotary disk 20. At this time, when the rotary disk 20 continues to rotate, the first limiting boss 53 will push the protrusion 33 toward the direction a in the figure. At this time, the locking block 30 will move horizontally along the pushing edge of the first limiting boss 53 as the first direction a, so that after the locking block 30 moves relative to the rotary disk 20, the hanging end on the locking block 30 is hung on the hanging part. In this way, the locking end of the second end 302 of the locking block 30 and the locking groove 52 remain in a separated state. At this time, the locking block 30 will not limit the freedom of the rotary disk 20 to rotate counterclockwise relative to the mounting seat 10, so that the rotary disk 20 can rotate counterclockwise relative to the mounting seat 10.

[0043] When the hanging end on the locking block 30 is hung on the hanging portion, and the locking block 30 rotates counterclockwise to a predetermined position relative to the mounting seat 10 as the turntable 20, the second pushing portion pushes the second end 302 of the locking block 30 along the direction b shown in the figure. At this time, the locking block 30 will move laterally along the direction b as the second direction under the push of the second pushing portion. After the locking block 30 moves laterally along the direction b for a certain distance, the hanging end of the second end 302 of the locking block 30 is separated from the hanging portion, so that the locking block 30 has the freedom to swing in the groove 22 again, that is, the second end 302 of the locking block 30 has the freedom to swing toward the slot 52.

[0044] The spring 40 is used to provide an elastic stress applied to the locking block 30, which can make the second end 302 of the locking block 30 always have a tendency to swing away from the rotating shaft. When the hanging end is separated from the hanging part, the spring 40 pushes the second end 302 of the locking block 30, so that the clamping end on the second end 302 remains in a state of mutual clamping with one of the clamping grooves 52.

[0045] The second pushing portion is an arc-shaped guide wall 54 provided on the peripheral wall 51, and the distance between the arc-shaped guide wall 54 and the rotating shaft is set to be gradually changed. Specifically, in the counterclockwise direction, the arc-shaped guide wall 54 gradually approaches the rotating shaft from the end close to the card slot 52 to the end away from the card slot 52. Therefore, when the hanging end of the locking block 30 is hung on the hanging portion, and the rotating disk 20 rotates counterclockwise relative to the mounting seat 10, so that the second end 302 of the locking block 30 rotates to the end of the arc-shaped guide wall 54 close to the card slot 52, the second end 302 of the locking block 30 is locked. The second end 302 of the locking block 30 abuts against the arc-shaped guide wall 54, and the turntable 20 is continuously rotated in the counterclockwise direction. The arc-shaped guide wall 54 squeezes the second end 302 of the locking block 30, so that the locking block 30 moves laterally in the groove 22 relative to the turntable 20 along the above-mentioned second direction, and then finally the hanging end of the locking block 30 is separated from the hanging part, and the elastic stress of the spring 40 will act on the locking block 30 again, so that the clamping end on the locking block 30 swings back to a position away from the rotating shaft, that is, the clamping end swings back to a position where it can be clamped together with the clamping groove 52.

[0046] In the present invention, the clamping end is a clamping flange 31 protruding from the second end 302 of the locking block 30 toward the peripheral wall 51, and the clamping flange 31 and the protrusion 33 are arranged in a clockwise direction on the side of the locking block 30 facing the peripheral wall 51, and the hanging end is a hanging boss 32 protruding from the second end 302 of the locking block 30, and the hanging boss 32, the clamping flange 31, and the protrusion 33 are arranged in a clockwise direction on the locking block 30; a flange 23 protruding toward the rotating shaft is provided on the turntable 20, and the hanging portion is a hanging table 231 on the side of the flange 23 away from the second end 302 of the locking block 30, and after the locking block 30 is transversely moved a certain distance in the groove 22 along the direction a shown in the figure, the hanging boss 32 is hung on the hanging table 231 to limit the freedom of the second end 302 of the locking block 30 to swing in the direction away from the rotating shaft.

[0047] Figure 8-12 Shows the use of the utility model, combined with Figure 1-7 ,exist Figure 8 In the state shown, the rotating seat 21 is in a horizontal state, that is, the armrest located on the rotating seat 21 is in a horizontal state or approximately in a horizontal state, and the engaging flange 31 is clamped in the relatively middle clamping groove 52 among the multiple clamping grooves 52, so that the second end 302 of the locking block 30 is pressed against the clamping groove 52, and the first end 301 of the locking block 30 is pressed against the edge of the groove 22. In this state, the armrest is pressed down, that is, an external force in the counterclockwise direction is applied to the rotating seat 21. Due to the limiting effect of the locking block 30, the rotating seat 21 will not rotate, and the locking block 30 can provide a relatively stable support between the turntable 20 and the mounting seat 10 to prevent the rotating seat 21 from rotating abnormally in the counterclockwise direction when the armrest is pressed down too much, so that the armrest can stably support the user's arm when it is in use. Figure 8 In the state shown, the armrest is rotated clockwise, that is, an upward force is applied to the armrest, and the locking block 30 rotates with the turntable 20 relative to the peripheral wall 51, so that the snap-fitting flange 31 on the locking block 30 is snapped into the next snap-fitting groove 52. At this time, the armrest is adjusted to an upwardly tilted state, and the snap-fitting flange 31 is snapped with the next snap-fitting groove 52, so that the locking block 30 plays a limiting role between the turntable 20 and the mounting seat 10.

[0048] Fig. 9 Shown in Figure 8 In the state shown, the armrest can be adjusted upward to the maximum angle. Fig. 9 In the state shown, the engaging flange 31 is engaged with the engaging groove 52 closest to the first limiting boss 53. If the upward tilt angle of the armrest is too high and the armrest needs to be adjusted downward, the armrest is further moved in the clockwise direction. At this time, the engaging flange 31 is disengaged from the engaging groove 52 closest to the first limiting boss 53, and the locking block 30 continues to rotate to Fig.10In the state shown, during this process, the first limiting boss 53 blocks the protrusion 33 and will push the locking block 30 along the first direction a, so that the locking block 30 moves laterally in the first direction a in the groove 22 until the armrest can no longer rotate in the clockwise direction. The locking block 30 moves laterally along the first direction a to the extreme position, so that the hanging boss 32 on the locking block 30 is hung together with the hanging table 231 after the horizontal movement. At this time, the clamping flange 31 is disengaged from the clamping groove 52.

[0049] exist Fig.10 In the state shown, the second end 302 of the locking block 30 is located close to the rotating shaft, and the hanging table surface 231 on the rotating disk 20 cooperates with the hanging boss 32 to prevent the second end 302 of the locking block 30 from swinging in the direction away from the rotating shaft, so that the second end 302 of the locking block 30 is completely received inside the outer periphery of the rotating disk 20. When the rotating disk 20 rotates counterclockwise relative to the mounting seat 10, the engaging flange 31 will not exceed the outer periphery of the rotating disk 20, and will not engage with the engaging groove 52. Fig.10 In the state shown, the armrest can be freely rotated in the counterclockwise direction.

[0050] When the armrest is turned counterclockwise to Fig.11 In the state shown, the outer edge surface of the hanging boss 32 on the locking block 30 (or other positions of the second end 302 of the locking block 30) begins to contact the end of the arc-shaped guide wall 54 closest to the slot 52, and when the turntable 20 continues to rotate counterclockwise, the gradually changing structure of the arc-shaped guide wall 54 continuously applies a thrust force along the second direction b to the outer edge surface of the hanging boss 32, so that the locking block 30 moves inside the groove 22 along the second direction b to the limit position until Fig.12 In the state shown, at this time, since the second end 302 of the locking block 30 is no longer restricted by the hanging table 231, under the elastic stress of the spring 40, the second end 302 of the locking block 30 swings in the direction away from the rotating shaft. At this time, the turntable 20 rotates counterclockwise to the extreme position. When the armrest angle needs to be adjusted to the required position. Fig.12 In the state shown, the armrest is correspondingly moved upwards by a certain angle so that the engaging flange 31 of the locking block 30 is engaged with the corresponding engaging groove 52 .

[0051] In the above structure of the present invention, the locking block 30 plays a locking role between the turntable 20 and the mounting seat 10, and the locking block 30 can provide a relatively stable clamping force. The locking block 30 will not become loose due to the large downward pressure of the armrest, resulting in the problem of abnormal downward rotation of the armrest, so that the armrest can provide stable support for the user's arm, that is, the adjustment mechanism of the present invention can provide a large downward pressure value for the armrest; in addition, when the armrest angle needs to be adjusted, it is only necessary to rotate the armrest clockwise or counterclockwise, and the locking block 30 will not produce a large resistance to the rotation of the armrest. The user only needs to operate with one hand and easily rotate the armrest to complete the angle adjustment of the armrest, making the angle adjustment of the armrest simple and labor-saving.

[0052] In a preferred embodiment, a pressing surface 232 is formed on the flange 23 on one side facing the second end 302 of the locking block 30. When the engaging flange 31 is engaged with any one of the engaging grooves 52, the pressing surface 232 abuts against the periphery of the second end 302 of the locking block 30 to prevent the locking block 30 from moving relative to the rotating disk 20 along the first direction a. In other words, the pressing surface 232 is used to limit the degree of freedom of the locking block 30 to move laterally inside the groove 22. In this way, the spring 232 is used to prevent the locking block 30 from moving relative to the rotating disk 20 in the first direction a. The elastic stress of the spring 40 can make the engaging flange 31 on the lock block 30 always be engaged in one of the engaging grooves 52. When the engaging boss 32 on the lock block 30 moves to the junction of the pressing surface 232 and the engaging table 231, the pressing surface 232 no longer limits the freedom of movement of the lock block 30 in the groove 22. The protrusion 33 on the lock block 30 is moved by the first limiting boss 53, so that after the lock block 30 moves horizontally, the engaging boss 32 is engaged on the engaging table 231. By providing the pressing surface 232, when the lock block 30 locks the rotating disk 20 and the mounting seat 10, the locking block 30 is prevented from moving horizontally, which causes the limiting function of the locking block 30 to fail, and the stability of the armrest supporting the user's arm is further improved.

[0053] like Figure 4 , 5As shown in Figure 6, the groove 22 includes an inner wall 221, an inner wall 222, and an end wall 223. The inner wall 221 and the inner wall 222 are arranged opposite to each other, and the end wall 223 is connected between the inner wall 221 and one end of the inner wall 222. The end wall 223 is set to an arc shape with a middle part concave outward. The flange 23 is set between the inner wall 221 and the other end of the inner wall 222 of the groove 22, so that the hanging table 231 on the flange 23 is arranged opposite to the arc-shaped end wall 223; the first end 301 of the locking block 30 is set to be an arc shape with a middle part convex outward, so that the shape of the first end 301 of the locking block 30 matches the shape of the above-mentioned end wall 223, and the arc-shaped first end 301 is embedded in the arc-shaped end wall 223, so that the first end 301 of the locking block 30 can be on the end wall 2 23, so that the second end 302 of the locking block 30 can swing between the inner wall 221 and the inner wall 222 of the groove 22. The locking block 30 is a long strip structure, and the distance between the inner wall 221 and the inner wall 222 is set to be gradual. The distance between the inner wall 221 and the inner wall 222 gradually increases from the end close to the end wall 223 to the end close to the flange 23, so that the locking block 30 can swing inside the groove 22, and the amplitude of the swing of the locking block 30 inside the groove 22 is limited by the gradual structure between the inner wall 221 and the inner wall 222; by embedding the first end 301 of the locking block 30 in the arc-shaped end wall 223, the locking block 30 can move horizontally inside the groove 22 when the locking block 30 is pulled along the first direction a.

[0054] See also Figure 4 The turntable 20 is provided with a first limiting end face 202 and a second limiting end face 203 staggered along the circumference of the turntable 20. The first limiting end face 202 and the first limiting boss 53 form a first limiting structure, which is used to limit the maximum angle of the turntable 20 relative to the mounting seat 10 in the counterclockwise direction. Fig.12 As shown, the first limiting end face 202 conflicts with the first limiting boss 53, so that the turntable 20 cannot continue to rotate counterclockwise relative to the mounting seat 10. At this time, the arc-shaped guide wall 54 pushes the second end 302 of the lock block 30, so that the lock block 30 moves along the second direction b until the hanging boss 32 is completely separated from the hanging table 231. The first limiting structure prevents the turntable 20 from causing damage to the lock block 30 due to excessive rotation, and reminds the user that the handrail has been rotated to the limit position. A second limiting boss 55 is arranged on the peripheral wall 51, and the second limiting end face 203 and the second limiting boss 55 form a second limiting structure, which is used to limit the maximum angle of the turntable 20 rotating clockwise relative to the mounting seat 10.

[0055] like Fig.10As shown, the second limiting end face 203 conflicts with the second limiting boss 55, so that the turntable 20 cannot continue to rotate in the clockwise direction relative to the mounting base 10. At this time, the first limiting boss 53 just moves the locking block 30, so that the hanging boss 32 on the locking block 30 is completely hung on the hanging table surface 231. The first limiting structure prevents the turntable 20 from excessively rotating and causing damage to the locking block 30, and reminds the user that the armrest is rotated to the extreme position.

[0056] See also Figure 3 As shown, in another preferred embodiment, the slot 52 of the utility model includes a first slot wall 521 and a second slot wall 522. The first slot wall 521 extends from the peripheral wall 51 in a direction away from the rotating shaft, and the second slot wall 522 extends from one end of the first slot wall 521 away from the rotating shaft to the peripheral wall 51. The first slot wall 521 and the second slot wall 522 make the slot 52 form a structure with a roughly V-shaped cross section, and the above-mentioned snap-in flange 31 is set to a matching structure so that the snap-in flange 31 can be snapped into the slot 52.

[0057] When the locking flange 31 is locked in the locking groove 52, the first groove wall 521 is used to support the locking flange 31. Reasonable setting of the extension angle of the first groove wall 521 can prevent the locking flange 31 from detaching from the locking groove 52, especially when the armrest is subjected to downward pressure, that is, when the turntable 20 is subjected to a force that causes the turntable 20 to rotate counterclockwise, the direction of the mutual extrusion force between the first groove wall 521 and the locking flange 31 is consistent or approximately consistent with the extension direction of the locking block 30. It is best to make the interaction force able to remain perpendicular to the elastic stress of the spring 40, so as not to affect the spring 40 pressing the locking block 30, thereby avoiding abnormal detachment of the locking flange 31 from the locking groove 52.

[0058] The second groove wall 522 is configured to push the clamping flange 31 toward the direction close to the rotating shaft when the rotating disk 20 rotates clockwise relative to the mounting seat 10. Figure 8 , 12 In the state shown, the armrest can be quickly adjusted to the desired angle by rotating it clockwise.

[0059] One end of the spring 40 abuts against the rotating disk 20, and the other end abuts against the locking block 30, so that the second end 302 of the locking block 30 always maintains a tendency to swing toward the slot 52. The spring 40 can also be replaced by other elastic members, as long as the second end 302 of the locking block 30 always maintains a tendency to swing toward the slot 52. Of course, the setting of the elastic member should also meet the lateral movement requirements of the locking block 30.

[0060] The above are only preferred embodiments of the present invention. It should be pointed out that certain structures of the present invention are not limited to the above preferred embodiments. For example, in some embodiments, the present invention can be to set the above-mentioned matching block 50 integrally on the mounting seat 10, that is, directly set the peripheral wall 51 of the matching block 50, and the first limiting boss 53, the groove 52, and the arc guide wall 54 set on the peripheral wall 51 on the mounting seat 10.

[0061] Specifically, the bottom wall of the mounting groove 11 on the mounting seat 10 can be directly used as the peripheral wall 51. For another example, the structure in which the locking block 30 can swing and move laterally inside the groove 22 is not limited to the above-mentioned preferred embodiment. In some embodiments, a fixed shaft can be set on the turntable 20, and a long groove can be set at the first end 301 of the locking block 30. The fixed shaft is connected in the long groove so that the rotating shaft can move along the extension direction of the long groove and rotate relative to the long groove. A plurality of clamping grooves 52 cooperate with the clamping flange 31, and the second end 302 of the locking block 30 is clamped with the mounting seat 10 to achieve different gear adjustments of the handrail height. In fact, a plurality of clamping flanges 31 can also be set on the mounting seat 10, and a corresponding clamping groove 52 is set on the second end 302 of the locking block 30, so that the clamping groove 52 can be clamped with one of the clamping flanges 31.

[0062] The seat of the utility model includes the above-mentioned angle adjustment mechanism of the seat armrest, and other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0063] Finally, it should be noted that the above-mentioned implementation modes are only optional embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. The angle adjustment mechanism of the seat armrest is characterized by: It includes a rotating seat connected to the armrest, a mounting seat connected to the seat, a locking block and an elastic member; The rotating seat comprises a rotating disk, which is rotatably connected to the mounting seat through a rotating shaft; a groove and a hanging part are arranged on the rotating disk; a first pushing part, a plurality of clamping parts and a second pushing part are arranged on the mounting seat, the plurality of clamping parts are arranged along the circumference of the rotating shaft, and the first pushing part and the second pushing part are respectively arranged at two ends of the arrangement track of the plurality of clamping parts; The locking block includes a first end and a second end opposite to the first end. The locking block is embedded in the groove of the rotating disk and is configured to be able to swing in the groove to make the second end approach or move away from the rotating shaft, and to be able to move laterally in the groove to make the second end approach or move away from the hanging portion. The second end is provided with a clamping end and a hanging end. The clamping end is used to clamp with one of the clamping portions when the second end swings away from the rotating shaft to limit the freedom of the rotating disk to rotate counterclockwise relative to the mounting seat. The hanging end is used to clamp on the hanging portion when the second end approaches the hanging portion to limit the freedom of the second end to swing away from the rotating shaft. When the lock block rotates clockwise to a predetermined position relative to the mounting seat as the rotating disk rotates, the first pushing portion pushes the lock block to move horizontally in the first direction relative to the rotating disk so that the hanging end is hung on the hanging portion and the clamping end is in a separated state from the clamping portion; when the hanging end on the lock block is hung on the hanging portion and the lock block rotates counterclockwise to a predetermined position relative to the mounting seat as the rotating disk rotates, the second pushing portion pushes the lock block to move horizontally in the second direction relative to the rotating disk so that the hanging end on the lock block is separated from the hanging portion; The elastic member provides an elastic stress applied to the locking block, which is used to push the second end of the locking block toward the clamping portion when the hanging end is separated from the hanging portion so that the clamping end remains in a state of being clamped with one of the clamping portions.

2. The angle adjustment mechanism of the seat armrest according to claim 1, characterized in that: The mounting seat is provided with a mounting groove for the turntable to be embedded, the mounting groove includes two opposite side walls and a peripheral wall connected between the two side walls, the first pushing portion, multiple clamping portions, and the second pushing portion are all arranged on the peripheral wall; the groove is arranged on one side of the turntable and opposite to one of the side walls.

3. The angle adjustment mechanism of the seat armrest according to claim 2, characterized in that: The groove includes two opposite inner walls and an end wall connected between the two inner walls. The end wall is arranged in an arc shape with a middle portion concave outward. The hanging portion is arranged between the two inner walls of the groove and at an end opposite to the end wall. The first end of the locking block is arranged in an arc shape with a middle portion convex outward. The first end of the locking block is embedded in the end wall of the groove so that the second end of the locking block can swing between the two inner walls of the groove and the locking block can move horizontally between the two inner walls and between the end wall and the hanging portion.

4. The angle adjustment mechanism of the seat armrest according to claim 3, characterized in that: The turntable is provided with a flange protruding toward the rotating shaft, the hanging portion is a hanging table surface on the side of the flange facing away from the second end of the locking block, and the hanging end is a hanging boss protruding from the second end of the locking block to match the hanging table surface; a clamping surface is formed on the side of the flange facing the second end of the locking block, and the clamping surface is used to press against the second end of the locking block when the clamping end is clamped with any one of the clamping portions to prevent the locking block from moving laterally along the first direction relative to the turntable.

5. The angle adjustment mechanism of the seat armrest according to claim 2, characterized in that: The second end of the locking block is provided with a protrusion protruding toward the outer peripheral edge of the turntable, and the first pushing portion is a first limiting boss protruding from the peripheral wall toward the rotating shaft. When the locking block rotates clockwise to a predetermined position relative to the mounting seat as the turntable rotates, the first limiting boss abuts against the protrusion to push the locking block to move in a first direction relative to the turntable.

6. The angle adjustment mechanism of the seat armrest according to claim 5, characterized in that: The turntable is provided with a first limit end face and a second limit end face staggered along the circumference of the turntable, the first limit end face and the first limit boss form a first limit structure for limiting the maximum counterclockwise rotation angle of the turntable relative to the mounting seat, and a second limit boss is provided on the peripheral wall protruding toward the rotating shaft, the second limit end face and the second limit boss form a second limit structure for limiting the maximum clockwise rotation angle of the turntable relative to the mounting seat.

7. The angle adjustment mechanism of the seat armrest according to claim 2, characterized in that: The second pushing portion is an arc-shaped guide wall arranged on the peripheral wall. In the counterclockwise direction, the arc-shaped guide wall gradually approaches the rotating shaft from one end close to the clamping portion to the end away from the clamping portion. When the hanging end on the locking block is hung on the hanging portion and the locking block rotates counterclockwise with the turntable relative to the mounting seat to the end of the arc-shaped guide wall close to the clamping portion, the second end of the locking block abuts against the arc-shaped guide wall, so that the arc-shaped guide wall pushes the locking block to move horizontally along the second direction relative to the turntable.

8. The angle adjustment mechanism of the seat armrest according to claim 2, characterized in that: The adjustment mechanism of the chair armrest also includes a matching block which is embedded in the mounting groove in an assembleable manner to be fixed with the mounting seat, and the peripheral wall is located on the matching block.

9. The angle adjustment mechanism of the chair armrest according to any one of claims 2 to 8, characterized in that: The clamping end is a clamping flange protruding from the second end of the locking block toward the peripheral wall, the clamping portion is a clamping groove arranged on the peripheral wall, the clamping groove includes a first groove wall extending from the peripheral wall toward a direction away from the rotating shaft, and a second groove wall extending from one end of the first groove wall away from the rotating shaft to the peripheral wall, when the clamping flange is clamped in the clamping groove, the first groove wall is used to support the clamping flange to limit the freedom of the locking block to rotate counterclockwise relative to the mounting seat, and the second groove wall is used to push the clamping flange toward a direction close to the rotating shaft when the locking block rotates clockwise relative to the rotating seat along with the rotating disk; And / or, the elastic member is a spring, one end of the spring abuts against the rotating disk, and the other end of the spring abuts against the locking block, so that the second end of the locking block always maintains a tendency to swing toward the clamping portion.

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

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