Seat armrest angle adjusting mechanism and seat

Abstract

The utility model discloses a seat armrest angle adjusting mechanism and a seat. The seat armrest angle adjusting mechanism comprises a fixed seat, a movable seat, a locking piece, a driving assembly and an elastic resetting piece, the movable seat is pivoted on the fixed seat through a rotating shaft, and a supporting surface is formed on the movable seat; a plurality of positioning parts are arranged on the fixed seat, the locking piece is mounted on the movable seat, and a locking part is arranged on the locking piece; the driving assembly comprises an operation end and a driving end, the driving end is in linkage with the locking piece, and the operation end is used for driving the driving end to move so that the driving end can drive the locking piece to move towards the position away from the positioning part; the elastic reset piece is used for applying elastic stress to the locking piece, and the elastic stress is used for driving the locking piece to always keep the trend of moving towards the position close to the positioning part. According to the utility model, the supporting angle of the supporting surface can be adjusted according to the requirements of different sitting postures of a user, so that the angle adjustment convenience of the seat armrest is improved.

Description

Technical Field

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

[0002] Current gaming chairs, study chairs, etc. are usually equipped with armrests to support the user's arms to meet comfort requirements. The armrests of existing chairs are fixed to the side of the seat cushion or backrest. When the user needs to use the chair in a lying position, the armrest angle is difficult to adapt to the user's posture and cannot provide support. Utility Model Content

[0003] The utility model aims to provide a seat armrest angle adjustment mechanism and a seat, which can be adjusted in angle according to needs and can provide better support for the user's arms when the user is in different postures.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The seat armrest angle adjustment mechanism includes a fixed seat, a movable seat, a locking member, a driving assembly, and an elastic reset member;

[0006] The movable seat is pivotally connected to the fixed seat through a rotating shaft, and a support surface for supporting the user's arm is formed on the movable seat; a plurality of positioning parts arranged along the circumference of the rotating shaft are provided on the fixed seat, and a locking member is installed on the movable seat, and a locking part is provided on the locking member;

[0007] The driving assembly includes an operating end and a driving end, the driving end is linked with the locking member, the operating end is used to drive the driving end to move so that the driving end drives the locking member to move toward a position away from the positioning portion, when the locking member is at a position away from the positioning portion, the locking portion and the positioning portion are in a state of being separated from each other;

[0008] The elastic reset member is used to apply elastic stress to the locking member, and the elastic stress is used to drive the locking member to always maintain a tendency to move toward a position close to the positioning portion. When the locking member is close to the positioning portion, the locking portion and one of the positioning portions are in a mutually combined state.

[0009] Preferably, the driving assembly includes a movable block mounted on a movable seat and movable up and down, the driving end is a pushing inclined surface arranged on the movable block, and the locking member is configured to be able to move relative to the movable seat along the axial direction of the rotating shaft; the operating end is used to drive the movable block to move upward relative to the movable seat, and the pushing inclined surface is used to push the locking member when the movable block moves upward relative to the movable seat, so that the locking member moves along the axial direction of the rotating shaft from a position close to the positioning portion to a position away from the positioning portion.

[0010] Preferably, the movable seat is provided with a swivel seat fixedly matched with the movable seat, the swivel seat is provided with a guide groove extending in the up-down direction, and the movable block is embedded in the guide groove so that the movable block can move in the up-down direction relative to the swivel seat.

[0011] Preferably, the movable block includes two vertical walls and a top wall connected between the top ends of the two vertical walls. Two guide grooves are provided on the swivel seat, and the two vertical walls are slidably embedded in the two guide grooves respectively; the portion of the swivel seat located between the two guide grooves forms a guide slot whose extension direction is consistent with the axial direction of the rotating shaft, and the locking member is slidably embedded in the guide slot so that the locking member can move between a position away from the positioning portion and a position close to the positioning portion, and the elastic reset member is placed in the guide slot and is placed in a compressed manner between the locking member and the bottom wall of the guide slot.

[0012] Preferably, a retaining wall is formed between the two guide grooves and the guide slide grooves, and each retaining wall is provided with a guide groove whose extension direction is consistent with the axial direction of the rotating shaft; an axis head is protruding from both sides of the locking member, and the two axis heads are respectively slidably inserted into the two guide grooves; a push inclined surface is provided on the side of the two vertical walls away from the positioning portion, and the push inclined surface gradually inclines from top to bottom in the direction away from the positioning portion, and the two axis heads of the locking member are respectively pressed on the two push inclined surfaces after passing through the two guide grooves.

[0013] Preferably, the movable seat is provided with two opposing connecting ears, the swivel seat is fixed on the inner side of one of the connecting ears, the fixed seat is provided with a fixing ear, the fixing ear is located on the inner side of the other connecting ear, the inner side of the fixing ear is fixedly connected to a rotation limit plate arranged opposite to the swivel seat, and the positioning portion is arranged on the inner side surface of the rotation limit plate; the rotating shaft crosses the two connecting ears, the fixing ears, the rotation limit plate and the swivel seat, the locking member is slidably mounted on the rotating shaft and is located between the rotation limit plate and the swivel seat, and the locking portion is arranged on a side of the locking member facing the rotation limit plate; one end of the rotating shaft is against the outer side surface of one of the connecting ears, and the other end is threaded with a fastening screw, and the nut of the fastening screw is tightened against the outer side surface of the other connecting ear.

[0014] Preferably, the positioning portion is a positioning slot provided on the inner side of the rotation limiting disk, and the locking portion is a locking protruding tooth provided on a side of the locking member facing the rotation limiting disk, and the shape of the locking protruding tooth matches the shape of the positioning slot;

[0015] And / or, the rotation limiting plate is fixedly connected to the fixing ear in a detachable manner, and the rotating seat is fixedly connected to one of the connecting ears in a detachable manner.

[0016] Preferably, an installation cavity is formed inside the movable seat, and the driving assembly also includes a pull wire, a sleeve, and a lever located in the installation cavity. Both ends of the sleeve are fixedly connected to the movable seat, the pull wire is passed through the sleeve and its two ends respectively pass through the two ends of the sleeve, the lower end of the pull wire is connected to the movable block, the middle part of the lever is pivotally connected to the movable seat, one end of the lever passes through to the outside of the movable seat to form an operating end located below the supporting surface, and the other end forms a driving end that is linked with the upper end of the pull wire to drive the pull wire to move upward; an elastic member is also provided between the movable seat and the operating end, and the elastic member is used to apply downward elastic stress to the operating end.

[0017] Preferably, an adjusting block rotatably connected to the movable seat is further provided in the installation cavity, and a connecting end and a matching end are provided on the adjusting block, the connecting end is connected to the upper end of the pull wire, and the matching end matches with the toggle end of the toggle rod so that when the toggle end pushes the matching end to move, the adjusting block rotates relative to the movable seat, and then the connecting end swings upward;

[0018] And / or, the sleeve is a flexible sleeve, the movable seat includes an inner movable seat, and an outer movable seat sleeved on the outside of the inner movable seat, the bottom of the outer movable seat is pivotally connected to the fixed seat through a rotating shaft, the supporting surface is located at the top of the inner movable seat, and the outer movable seat and the inner movable seat cooperate in a manner in which the relative position in the up and down directions can be adjusted.

[0019] A seat, comprising the above-mentioned seat armrest angle adjustment mechanism.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The locking member is then moved back and forth to release the locking member from the locking means, so that the locking member can be released from the locking means and the locking member can be retracted to allow the user to move the chair back to the original position. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2A cross-sectional view of 1 is provided to illustrate a use state of the utility model;

[0024] Figure 3 This is another schematic diagram of the use state of the utility model;

[0025] Figure 4 for Figure 1 Schematic diagram of the structure of the middle drive assembly;

[0026] Figure 5 for Figure 1 Schematic diagram of the cooperation between the middle locking member, the movable block and the swivel seat;

[0027] Figure 6 for Figure 1 Schematic diagram of the structure of the transfer seat;

[0028] Figure 7 for Figure 1 A schematic diagram of the structure of the middle locking member;

[0029] Figure 8 for Figure 1 A schematic diagram of the structure of the middle rotating limit plate;

[0030] Wherein: 10, movable seat; 101, inner movable seat; 102, outer movable seat; 11, supporting surface; 12, connecting ear; 13, clamping seat; 15, spring; 20, fixed seat; 21, rotation limit plate; 211, positioning part; 22, fixed ear; 30, locking piece; 31, locking part; 32, shaft head; 33, shaft hole; 40, reset spring; 50, driving assembly; 51, movable block; 511, vertical wall; 512, top wall; 513, push inclined surface; 52, lever; 521, paddle; 522, toggle end; 523, pivot; 53, pull wire; 531, joint; 532, joint; 54, sleeve; 541, fixed head; 55, adjustment block; 551, mating end; 552, connecting end; 60, rotating shaft; 61, fastening screw; 70, rotating seat; 71, guide groove; 72, retaining wall; 73, guide groove; 74, guide slide groove; 741, bottom wall. 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, 7, and 8 show a chair armrest angle adjustment mechanism of the utility model, which includes a fixed seat 20, a movable seat 10, a locking member 30, a driving assembly 50, and a return spring 40. The top surface of the movable seat 10 forms a support surface 11. When the seat is in use, the support surface 11 is used to support the user's arm. The bottom of the movable seat 10 is pivotally connected to the fixed seat 20 through a rotating shaft 60 extending in the left-right direction, so that the movable seat 10 can rotate relative to the fixed seat 20 in the front-to-back direction. The fixed seat 20 can be fixed on the seat cushion of the seat. When the movable seat 10 rotates to a predetermined angle relative to the fixed seat 20, the support surface 11 on the top of the movable seat 10 can be in an appropriate position and angle to support the user's arm.A plurality of positioning portions 211 are provided on the fixed seat 20, and the plurality of positioning portions 211 are arranged circumferentially around the rotating shaft 60. The locking member 30 is installed on the movable seat 10, and is configured to be movable relative to the movable seat 10. A locking portion 31 is provided on the locking member 30, and the locking portion 31 matches the positioning portion 211 on the fixed seat 20. When the locking member 30 moves relative to the movable seat 10, the locking portion 31 on the locking member 30 can be combined with or separated from the positioning portion 211 on the fixed seat 20; the driving assembly 50 includes an operating end and a driving end, and the driving end is linked with the locking member 30, and the operating end is used to drive the driving end to move so that the driving member 30 The end can drive the locking member 30 to move toward a position away from the positioning portion 211. When the locking member 30 is at a position away from the positioning portion 211, the locking portion 31 on the locking member 30 and the positioning portion 211 are in a state of separation from each other. At this time, the locking member 30 will not limit the freedom of the movable seat 10 to rotate forward and backward relative to the fixed seat 20; the return spring 40 is used to apply elastic stress to the locking member 30, and the locking member 30 is driven by the elastic stress to always maintain a tendency to move toward a position close to the positioning portion 211. When the locking member 30 is at a position close to the positioning portion 211, the locking portion 31 on the locking member 30 and one of the positioning portions 2 11 are in a state of being combined with each other, so that the locking member 30 is used to limit the freedom of the movable seat 10 to rotate forward and backward relative to the fixed seat 20. That is to say, when no operation is performed on the operating end of the driving assembly 50, the elastic stress applied to the locking member 30 by the return spring 40 is used to keep the locking member 30 at a position close to the positioning portion 211. At this time, the locking portion 31 on the locking member 30 is combined with one of the positioning portions 211, so that the locking member 30 can be maintained in a state of locking the relative rotational freedom of the movable seat 10 and the fixed seat 20. When it is necessary to adjust the angle of the supporting surface 11, the operating end is used to drive the driving assembly 50 to rotate forward and backward. The movable end moves, and then the driving end drives the locking member 30 to move. After the locking member 30 moves to a position away from the positioning portion 211, the locking portion 31 thereon separates from the positioning portion 211, releasing the freedom of the movable seat 10 to rotate forward and backward relative to the fixed seat 20. At this time, the movable seat 10 is rotated forward and backward, and the movable seat 10 is adjusted to an appropriate angle, releasing the external force on the operating end, and the elastic stress of the reset spring 40 causes the locking member 30 to return to a position close to the positioning portion 211. At this time, the locking portion 31 is combined with the positioning portion 211 at the corresponding position, and the locking member 30 re-locks the movable seat 10 and the fixed seat 20 to complete the angle adjustment of the support surface 11.

[0035] In the present invention, the movable seat 10 and the fixed seat 20 are pivotally connected together, and the locking member 30 can move away from the positioning portion 211 under the drive of the driving assembly 50, so that the locking portion 31 on the locking member 30 is separated from the positioning portion 211, and the locking of the movable seat 10 and the fixed seat 20 is released. In this way, the movable seat 10 can be quickly rotated back and forth. When the movable seat 10 is rotated to an appropriate position, the reset spring 40 can quickly reset the locking member 30. After the reset, the locking member 30 quickly moves to a position close to the positioning portion 211, so that the locking member 31 can be locked. The locking portion 31 on 0 is quickly combined with the positioning portion 211 to complete the adjustment of the angle of the support surface 11. When using the chair, the user can adjust the support angle of the support surface 11 according to the needs of different sitting postures, and the user's arms can obtain better support in different sitting postures; when adjusting the angle of the support surface 11, it is only necessary to rotate the movable seat 10 to the corresponding angle while operating the operating end. The support surface 11 can be adjusted to a suitable state after one adjustment, which improves the convenience of adjusting the angle of the seat armrest.

[0036] In a preferred embodiment, the driving assembly 50 of the utility model includes a movable block 51 installed on the movable seat 10 and can move up and down. The driving end is a push bevel 513 set on the movable block 51. The locking member 30 is configured to be able to move relative to the movable seat 10 along the axial direction of the rotating shaft 60. The operating end is used to drive the movable block 51 to move upward relative to the movable seat 10. The push bevel 513 abuts against the locking member 30. When the push bevel 513 moves upward with the movable block 51, the locking member 30 can move along the axial direction of the rotating shaft 60 (that is, the left and right direction in the figure) from a position close to the positioning portion 211 to a position away from the positioning portion 211 through the inclined surface reversal. When the locking member 30 moves to a position away from the positioning portion 211, the locking portion 31 on the locking member 30 is completely disengaged from the positioning portion 211.A swivel seat 70 fixedly matched with the movable seat 10 is also provided on the movable seat 10, the movable block 51 can be installed on the swivel seat 70 for vertical movement, and the locking member 30 can be installed on the swivel seat 70 for left and right movement. Specifically, a guide groove 71 extending in the up-down direction is provided on the swivel seat 70, and the movable block 51 is embedded in the guide groove 71 so that the movable block 51 can move in the up-down direction relative to the swivel seat 70, and then the push inclined surface 513 on the movable block 51 can move up and down relative to the movable seat 10; the movable block 51 specifically includes two vertical walls 511, and a top wall 512 connected between the top ends of the two vertical walls 511. Two guide grooves 71 are provided, and the two vertical walls 511 are respectively slidably embedded in the two guide grooves 71. The guide grooves 71 are used to guide the up and down movement of the movable block 51, so that the movable block 51 only has the freedom to move in the up and down direction relative to the rotating seat 70; a guide slot 74 is formed on the surface of the rotating seat 70 facing the positioning portion 211 and located between the two guide grooves 71. The guide slot 74 is formed by the surface of the rotating seat 70 facing the positioning portion 211 being recessed along the axial direction of the rotating shaft 60 in the direction away from the positioning portion 211. The outer shape of the locking member 30 matches the shape of the guide slot 74, and the locking member 30 is slidably embedded in the guide slot 74 so that the locking member 30 0 has only the freedom to move in the left and right directions relative to the rotating seat 70. An axial hole 33 may be provided on the locking member 30, and the rotating shaft 60 passes through the axial hole 33, so that the locking member 30 is slidably sleeved on the rotating shaft 60, and the rotating shaft 60 is further used to guide the left and right movement of the locking member 30. The locking member 30 slides in the guide slot 74, so that the locking member 30 can move between a position away from the positioning portion 211 and a position close to the positioning portion 211. The return spring 40 is placed inside the guide slot 74, and its two ends are respectively pressed against the bottom wall 741 of the guide slot 74 and the locking member 30, so that the return spring 40 is placed in a compressed manner between the locking member 30 and the guide slot. The bottom wall 741 of the groove 74 is formed between the bottom wall 741 of the groove 74, so that the return spring 40 can always push the locking member 30 toward the direction close to the positioning portion 211. When the user applies external force to the operating end, the movable block 51 moves upward, and the pushing inclined surface 513 on the movable block 51 squeezes the locking member 30, so that the locking member 30, which has freedom of movement only in the left and right directions, can move away from the positioning portion 211 to further compress the return spring 40. After the user releases the external force on the operating end, the locking member 30 moves to a position close to the positioning portion 211 under the action of the elastic stress of the return spring 40, and the locking member 30 squeezes the pushing inclined surface 513, causing the movable block 51 to move downward to reset.Since the swivel seat 70 is arranged on the movable seat 10, the guide groove 71 and the guide slide groove 74 adapted to the movable block 51 and the locking member 30 are all arranged on the swivel seat 70, thereby ensuring that the movable block 51 and the locking member 30 can be movably matched with the movable seat 10, and there is no need to set related structures that match the movable block 51 and the locking member 30 at other positions of the movable seat 10. At the same time, the movable block 51 and the locking member 30 are centrally arranged at the position where the movable seat 10 and the fixed seat 20 pivotally match, making the structure of the entire mechanism more compact and the parts more convenient. Easy to process and manufacture; the movable block 51 is set to a door-shaped structure, which can make room for the locking member 30 to make installation space, which is beneficial to space utilization and further improves the compactness of the entire mechanism. The movable block 51 with a door-shaped structure can be more conducive to the inclined plane reversing cooperation between the locking member 30 and the movable block 51. Specifically, a retaining wall 72 is formed between the two guide grooves 71 and the guide slide groove 74, and each retaining wall 72 is provided with a guide groove 73 whose extension direction is consistent with the axial direction of the rotating shaft 60. The two sides of the locking member 30 protrude respectively. The locking member 30 is provided with an axis head 32, and the two axis heads 32 are respectively slidably connected in the guide groove 73. The axis head 32 cooperates with the guide groove 73 to further guide the movement of the locking member 30, so that the locking portion 31 on the locking member 30 can be more accurately combined with the positioning portion 211. At the same time, the inclined plane reversing cooperation between the locking member 30 and the movable block 51 can be more stable, avoiding the locking member 30 and the movable block 51 from getting stuck; a push inclined plane is provided on the side of the two vertical walls 511 away from the positioning portion 211. The push inclined surface 513 is gradually inclined from top to bottom in a direction away from the positioning portion 211, and the two shaft heads 32 on the locking member 30 are respectively pressed onto the two push inclined surfaces 513 after passing through the two guide grooves 73. In this way, based on the door-shaped structure of the movable block 51 mentioned above, not only can installation space be made for the locking member 30, but the two sides of the locking member 30 can also form a structure of inclined surface reversing cooperation with the two sides of the movable block 51 at the same time, thereby further improving the stability of the structure of the inclined surfaces cooperating with each other between the locking member 30 and the movable block 51.

[0037] It should be pointed out that the above-mentioned return spring 40 in the utility model can also be replaced by other elastic return parts, for example, it can be an elastic rubber block installed between the locking member 30 and the bottom wall 741 of the guide groove 74, or it can be a spring sheet installed between the locking member 30 and the rotating seat 70; of course, in other embodiments, the elastic return part can also be installed between the locking member 30 and other parts of the movable seat 10. In short, as long as the elastic return part can provide an elastic stress that pushes or pulls the locking member 30 toward the direction close to the positioning portion 211, it will be fine.

[0038] In another preferred embodiment, the movable seat 10 is provided with two opposing connecting ears 12, and the two connecting ears 12 are spaced apart by a predetermined interval to provide a suitable installation space for the fixed seat 20, the rotating seat 70, the locking member 30, and the movable block 51, wherein the rotating seat 70 is fixed on the inner side of one of the connecting ears 12, and the fixed seat 20 is provided with a fixing ear 22, and the fixing ear 22 is located on the inner side of the other connecting ear 12, and the inner side of the fixing ear 22 is fixedly connected with a rotating limit plate 21 opposite to the rotating seat 70, and the positioning portion 211 is arranged on the inner side surface of the rotating limit plate 21, and the rotating shaft 60 crosses the two connecting ears 12, the fixing ear 22, the rotating limit plate 21, and the rotating seat 70, and the locking member 30 is slidably sleeved on the rotating shaft 60, and is located between the rotating limit plate 21 and the rotating seat The locking member 31 is located between the seats 70, and the locking portion 31 is located on one side of the locking member 30 facing the rotation limit disk 21; one end of the rotating shaft 60 is against the outer side surface of one of the connecting ears 12, and the other end is screwed with a fastening screw 61, and the nut of the fastening screw 61 is tightly pressed against the outer side surface of the other connecting ear 12, that is, the rotating shaft 60 and the fastening screw 61 form a locking screw. During assembly, the fixed ear 22, the rotation limit disk 21, the rotating seat 70, and the locking member 30 are placed between the two connecting ears 12, and the rotating shaft 60 crosses the connecting ear 12, the fixed ear 22, the rotation limit disk 21, the locking member 30, the rotating seat 70, and the connecting ear 12 on the right side from left to right in turn, and then the fastening screw 61 is screwed onto the rotating shaft 60, and the assembly is completed by tightening the fastening screw 61. In order to further improve the convenience of assembly, the above-mentioned rotation limit plate 21 is fixed to the fixed ear 22 by screws or other detachable means, and the swivel seat 70 is fixed to one of the connecting ears 12 by screws or other detachable means. During assembly, the locking piece 30 and the movable block 51 are pre-installed on the swivel seat 70 to form an assembly, and then the assembly is fixed to one of the connecting ears 12.

[0039] The positioning portion 211 is a positioning slot provided on the rotation limiting disk 21, and the locking portion 31 is a locking protruding tooth provided on the surface of the locking member 30 facing the rotation limiting disk 21. The locking protruding tooth matches the shape of the positioning slot, and the two can be combined with each other to limit the rotational freedom of the locking member 30 relative to the rotation limiting disk 21. Since the locking member 30 only has the freedom to move in the left and right directions relative to the movable seat 10, when the locking protruding tooth is combined with the positioning slot, the rotational freedom of the movable seat 10 relative to the fixed seat 20 can be limited by the locking member 30. The positioning portion 211 and the locking portion 31 are not limited to the above-mentioned structure, and the two can also be other structures that can be combined with each other. For example, the positioning portion 211 is a protruding tooth provided on the rotation limiting disk 21, and the locking portion 31 is a slot provided on the locking member 30.

[0040] In the utility model, a mounting cavity is formed inside the movable seat 10, and the driving component 50 is basically arranged inside the mounting cavity. Specifically, the driving component 50 also includes a pull wire 53, a sleeve 54, and a lever 52. The pull wire 53, the sleeve 54, and the lever 52 are all placed in the mounting cavity. Both ends of the sleeve 54 are fixedly connected to the movable seat 10. Specifically, a fixed head 541 is respectively provided at both ends of the sleeve 54. Two card seats 13 are provided inside the movable seat 10. The two fixed heads 541 are respectively fixed to the two card seats 13. The pull wire 53 is connected to the inside of the sleeve 54, and its two ends are respectively passed through the two ends of the sleeve 54. A joint 532 is provided at the lower end of the pull wire 53, and the joint 532 is hung on the movable block 51. The top wall 512 is formed on the top wall 512 to connect the lower end of the pull wire 53 with the movable block 51. The middle part of the lever 52 is pivotally connected to the movable seat 10 through a pivot 523. One end of the lever 52 passes through the outside of the movable seat 10 to form a paddle 521 located below the support surface 11, and the other end forms a paddle end 522 linked to the upper end of the pull wire 53. The paddle 521 is the above-mentioned operating end. When the paddle 521 is pushed upward, the paddle end 522 pulls the pull wire 53, and the pull wire 53 can pull the movable block 51 upward, thereby enabling the movable block 51 to push the locking member 30 to move in a direction away from the positioning portion 211, so that the locking portion 31 is disengaged from the positioning portion 211. A spring 15 is also provided between the paddles 521 of the movable seat 10. The spring 15 is used to apply a downward elastic stress to the paddle 521. After the upward external force on the paddle 521 is released, the elastic stress of the spring 15 can reset the paddle 521 downward. The above-mentioned toggle end 522 can be directly connected to the upper end of the pull wire 53. The upper end of the pull wire 53 is wound around a shaft located on the movable seat 10. When the paddle 521 swings upward, the toggle end 522 swings downward, and the upper end of the pull wire 53 is pulled downward. The shaft plays a reversing role similar to that of a fixed pulley, so that the pull wire 53 pulls the movable block 51 upward. In a preferred embodiment, the utility model provides an adjustment block 55 inside the installation cavity, and the adjustment block 55 is provided with a connecting end 552 and a mating end 551. Specifically, the adjustment block 55 can be a circular structure, and an eccentric shaft is provided on it, and the adjustment block 55 is pivotally connected to the movable seat 10 through the eccentric shaft. The adjustment block 55 is provided with a notch which is recessed inward from its outer edge surface, and the connecting end 552 and the mating end 551 are respectively located on both sides of the notch. A joint 531 connected to the connecting end 552 is provided on the top of the pull wire 53, and the mating end 551 abuts against the toggle end 522 of the toggle rod 52. The toggle end 522 can push the mating end 551, so that the adjustment block 55 rotates counterclockwise, and then the connecting end 552 swings upward, and the upward-swinging connecting end 552 pulls the pull wire 53 upward, and then the pull wire 53 can pull the movable block 51 to move upward.

[0041] Figure 2The movable seat 10 and the fixed seat 20 of the utility model are locked by the locking member 30. Figure 3 The utility model is shown in the use state when adjusting the height of the support surface 11; Figure 2 In the embodiment, due to the elastic stress exerted by the return spring 40 on the locking member 30, the locking member 30 is kept at a position close to the positioning portion 211 (i.e., the locking member 30 is close to the rotation limit plate 21). At this time, the locking member 30 locks the rotational freedom of the movable seat 10 relative to the fixed seat 20, and the support surface 11 on the movable seat 10 can stably support the user's arm; in the embodiment, the return spring 40 exerts an elastic stress on the locking member 30, so that the locking member 30 is kept at a position close to the positioning portion 211 (i.e., the locking member 30 is close to the rotation limit plate 21). At this time, the locking member 30 locks the rotational freedom of the movable seat 10 relative to the fixed seat 20, and the support surface 11 on the movable seat 10 can stably support the user's arm. Figure 3 When the angle of the support surface 11 needs to be adjusted, the user places the palm of the hand on the support surface 11, places the fingers on the top side of the movable seat 10, and pushes the paddle 521 upward to drive the lever 52 to rotate. The toggle end 522 of the lever 52 pushes the adjustment block 55 to rotate, and pulls the pull wire 53 upward. The pull wire 53 drives the movable block 51 to move upward. When the movable block 51 moves upward, the push inclined surface 513 on it pushes the shaft head 32 of the locking member 30, so that the locking member 30 moves in a direction away from the positioning portion 211, and then the locking portion 31 is disengaged from the positioning portion 211. At this time, the locking member 30 no longer limits the freedom of rotation of the movable seat 10 relative to the fixed seat 20. The movable seat 10 is rotated forward and backward to keep the supporting surface 11 at the required angle. Then the finger releases the external force acting on the paddle 521. Under the elastic stress of the reset spring 40, the locking member 30 returns to the position close to the positioning portion 211. The locking portion 31 is combined with the positioning portion 211 at the corresponding position to lock the movable seat 10 and the fixed seat 20. At the same time, the shaft head 32 on the locking member 30 squeezes the push inclined surface 513, so that the movable block 51 moves downward and resets.

[0042] The above-mentioned sleeve 54 is a flexible sleeve, and the movable seat 10 includes an inner movable seat 101 and an outer movable seat 102, and the outer movable seat 102 is sleeved on the outside of the inner movable seat 101, wherein the mounting cavity is located inside the inner movable seat 101, and the above-mentioned two connecting ears 12 are both located on the outer movable seat 102, so that the outer movable seat 102 can pivotally cooperate with the fixed seat 20, and the driving assembly 50 is installed in the mounting cavity of the inner movable seat 101, and the support surface 11 is located on the top of the inner movable seat 101; the outer movable seat 102 cooperates with the inner movable seat 101 in a manner that can be adjusted in the up and down directions, that is, the outer movable seat 102 is slidably sleeved on the outside of the inner movable seat 101, and a locking mechanism is arranged between the two, and the locking mechanism can lock the inner movable seat 101 and the outer movable seat 102 after the inner movable seat 101 moves to a predetermined position relative to the outer movable seat 102 along the up and down directions, thereby adjusting the height of the support surface 11, so that the angle and height of the support surface 11 can be adjusted to the optimal state. The sleeve 54 is set to a flexible structure, so that when the inner movable seat 101 moves up and down relative to the outer movable seat 102, it is ensured that the driving assembly 50 can normally drive the locking member 30 to move. The locking mechanism used to keep the inner movable seat 101 and the outer movable seat 102 relatively fixed can be a transverse locking pin, or a spring pin, etc., which is the same as the prior art, and will not be described in detail here.

[0043] In the present invention, the driving assembly 50 does not necessarily adopt the above-mentioned inclined plane reversing matching structure to realize the lateral movement of the locking member 30. In other embodiments, the driving assembly 50 can also push the locking member 30 to move horizontally by rotating the movable block 51, or realize the lateral movement of the locking member 30 by rotating the movable block 51 to toggle the locking member 30. In short, the locking member 30 is driven to move by the operating end of the driving assembly 50, so that the locking portion 31 on the locking member 30 can be separated from the positioning portion 211 after the locking member 30 moves. The locking member 30 does not necessarily move in the left and right directions to realize the separation of the locking portion 31 from the positioning portion 211. In other embodiments, the locking member 30 can be installed on the rotating seat 70 or other parts of the movable seat 10 so as to be able to swing left and right. The driving assembly 50 is used to drive the locking member 30 to swing in the direction away from the positioning portion 211, so that the locking portion 31 on the locking member 30 is separated from the positioning portion 211.

[0044] The seat of the utility model includes the above-mentioned seat armrest angle adjustment mechanism, and other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0045] 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. Seat armrest angle adjustment mechanism, characterized in that: It includes a fixed seat, a movable seat, a locking member, a driving assembly, and an elastic reset member; The movable seat is pivotally connected to the fixed seat through a rotating shaft, and a support surface for supporting the user's arm is formed on the movable seat; a plurality of positioning parts arranged along the circumference of the rotating shaft are provided on the fixed seat, and a locking member is installed on the movable seat, and a locking part is provided on the locking member; The driving assembly includes an operating end and a driving end, the driving end is linked with the locking member, the operating end is used to drive the driving end to move so that the driving end drives the locking member to move toward a position away from the positioning portion, when the locking member is at a position away from the positioning portion, the locking portion and the positioning portion are in a state of being separated from each other; The elastic reset member is used to apply elastic stress to the locking member, and the elastic stress is used to drive the locking member to always maintain a tendency to move toward a position close to the positioning portion. When the locking member is close to the positioning portion, the locking portion and one of the positioning portions are in a mutually combined state.

2. The seat armrest angle adjustment mechanism according to claim 1, characterized in that: The driving assembly includes a movable block mounted on a movable seat and movable up and down, a driving end being a pushing inclined surface arranged on the movable block, and a locking member being configured to be able to move relative to the movable seat along the axial direction of the rotating shaft; an operating end being used to drive the movable block to move upward relative to the movable seat, and a pushing inclined surface being used to push the locking member when the movable block moves upward relative to the movable seat, so that the locking member moves along the axial direction of the rotating shaft from a position close to the positioning portion to a position away from the positioning portion.

3. The seat armrest angle adjustment mechanism according to claim 2, characterized in that: The movable seat is provided with a rotating seat fixedly matched with the movable seat, and the rotating seat is provided with a guide groove extending in the up-down direction, and the movable block is embedded in the guide groove so that the movable block can move relative to the rotating seat in the up-down direction.

4. The seat armrest angle adjustment mechanism according to claim 3, characterized in that: The movable block includes two vertical walls and a top wall connected between the top ends of the two vertical walls. Two guide grooves are arranged on the rotating seat, and the two vertical walls are slidably embedded in the two guide grooves respectively; the portion of the rotating seat located between the two guide grooves forms a guide slot whose extension direction is consistent with the axial direction of the rotating shaft, and the locking member is slidably embedded in the guide slot so that the locking member can move between a position away from the positioning portion and a position close to the positioning portion. The elastic reset member is placed in the guide slot and is placed in a compressed manner between the locking member and the bottom wall of the guide slot.

5. The seat armrest angle adjustment mechanism according to claim 4, characterized in that: A retaining wall is formed between the two guide grooves and the guide slide grooves, and each retaining wall is provided with a guide groove whose extension direction is consistent with the axial direction of the rotating shaft; a shaft head is protruding from both sides of the locking member, and the two shaft heads are slidably inserted into the two guide grooves; a push inclined surface is provided on the side of the two vertical walls away from the positioning part, and the push inclined surface gradually inclines from top to bottom in the direction away from the positioning part, and the two shaft heads of the locking member are pressed on the two push inclined surfaces after passing through the two guide grooves.

6. The seat armrest angle adjustment mechanism according to claim 3, characterized in that: The movable seat is provided with two opposite connecting ears, the swivel seat is fixed on the inner side of one of the connecting ears, the fixed seat is provided with a fixing ear, the fixing ear is located on the inner side of the other connecting ear, the inner side of the fixing ear is fixedly connected with a rotation limit plate arranged opposite to the swivel seat, and the positioning part is arranged on the inner side of the rotation limit plate; the rotating shaft crosses the two connecting ears, the fixing ears, the rotation limit plate and the swivel seat, the locking member is slidably sleeved on the rotating shaft and is located between the rotation limit plate and the swivel seat, and the locking part is arranged on a side of the locking member facing the rotation limit plate; one end of the rotating shaft is against the outer side surface of one of the connecting ears, and the other end is threaded with a fastening screw, and the nut of the fastening screw is tightly pressed against the outer side surface of the other connecting ear.

7. The seat armrest angle adjustment mechanism according to claim 6, characterized in that: The positioning portion is a positioning slot arranged on the inner side of the rotation limiting disk, and the locking portion is a locking protruding tooth arranged on a side of the locking member facing the rotation limiting disk, and the shape of the locking protruding tooth matches the shape of the positioning slot; And / or, the rotation limiting plate is fixedly connected to the fixing ear in a detachable manner, and the rotating seat is fixedly connected to one of the connecting ears in a detachable manner.

8. The seat armrest angle adjustment mechanism according to claim 2, characterized in that: An installation cavity is formed inside the movable seat, and the driving assembly also includes a pull wire, a sleeve, and a lever located in the installation cavity. Both ends of the sleeve are fixedly connected to the movable seat, the pull wire is passed through the sleeve and its two ends respectively pass through the two ends of the sleeve, the lower end of the pull wire is connected to the movable block, the middle part of the lever is pivotally connected to the movable seat, one end of the lever passes through the outside of the movable seat to form an operating end located below the supporting surface, and the other end forms a driving end that is linked with the upper end of the pull wire to drive the pull wire to move upward; an elastic member is also provided between the movable seat and the operating end, and the elastic member is used to apply downward elastic stress to the operating end.

9. The seat armrest angle adjustment mechanism according to claim 8, characterized in that: An adjusting block rotatably connected to the movable seat is also arranged in the installation cavity, and a connecting end and a matching end are arranged on the adjusting block, the connecting end is connected to the upper end of the pull wire, and the matching end matches with the toggle end of the toggle rod so that when the toggle end pushes the matching end to move, the adjusting block rotates relative to the movable seat, and then the connecting end swings upward; And / or, the sleeve is a flexible sleeve, the movable seat includes an inner movable seat, and an outer movable seat sleeved on the outside of the inner movable seat, the bottom of the outer movable seat is pivotally connected to the fixed seat through a rotating shaft, the supporting surface is located at the top of the inner movable seat, and the outer movable seat and the inner movable seat cooperate in a manner in which the relative position in the up and down directions can be adjusted.

10. A seat, characterized in that: It comprises the seat armrest angle adjustment mechanism as described in any one of claims 1 to 9.

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