Multidirectional adjusting handrail

Abstract

A multi-directional adjusting handrail comprises a mounting base and a handrail assembly, a handrail base is arranged on the mounting base, a base groove is formed in the handrail base and used for mounting an upwarp base, and the top face of the upwarp base and the top face of the handrail base are located on the same arc face; in conclusion, the multi-directional adjusting handrail can be adjusted in multiple angles and multiple directions so as to meet the use requirements of users, for example, the upwarp angle adjustment of the handrail assembly is achieved through the cooperation between the swing base and the upwarp base, and the height adjustment of the handrail assembly is achieved through the cooperation between the lifting clamping piece and the inner inserting rod; the armrest base is matched with the rotary seat, so that rotation of the armrest assembly is achieved, and in addition, the armrest assembly can rotate by 360 degrees and can be adjusted in a front-back sliding mode. The use comfort of the armrest is improved through multi-directional adjustment, so that the optimal use state is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of seat accessories, and in particular relates to a multi-directional adjustable armrest. Background Art

[0002] Seats are commonly used furniture in daily life and can be seen in homes, schools, office buildings, shops, cinemas, auditoriums and other places. With the increase in people's travel, public transportation such as airplanes, trains, high-speed trains, motor vehicles and long-distance buses have gradually become popular. During the driving or navigation of such public transportation, passengers spend most of their time in seats; in addition, people are also inseparable from seats in activities such as work, study and entertainment. Therefore, the comfort of seats and their accessories is particularly important. Among them, the armrests of seats are used to support the arms and are the main accessories of seats. However, the existing armrests of seats have limited adjustment directions and can generally only be adjusted up and down. They cannot be freely adjusted according to the needs of different users to obtain the most comfortable support position. Utility Model Content

[0003] The utility model aims to provide a multi-directional adjustable armrest to solve the technical problem that the existing seat armrests have poor adjustability and cannot meet user needs.

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

[0005] A multi-directional adjustable armrest, comprising a mounting seat and an armrest assembly, wherein an armrest base is arranged on the mounting seat, a base groove is arranged on the armrest base, the base groove is used to install an upturned base, the top surface of the upturned base and the top surface of the armrest base are located on the same arc surface, a swing seat is installed on the upturned base, the swing seat can slide back and forth along the top surface of the upturned base, and the armrest assembly is installed on the swing seat;

[0006] The upturned base is composed of a left base body and a right base body, which are respectively fixed in the base groove by screws, and a passing area is formed between the left base body and the right base body. The bottom surface of the swing base is an arc surface structure, and the bottom surface of the swing base is adapted to the curvature of the top surface of the upturned base. The bottom surface of the swing base is fixed with a limited arc plate by a short pipe fitting, and the short pipe fitting passes through the passing area, and the limited arc plate is located below the passing area;

[0007] A slider groove and a locking groove are provided in the short tube, a gear slider is provided in the slider groove, the gear slider can move in the slider groove in the left and right directions, a first compression spring is also provided in the slider groove, the first compression spring acts on the left end of the gear slider, a locking piece is provided in the locking groove, the locking piece is in the locking groove and can swing back and forth around its middle part, a second compression spring is also provided in the locking groove, the second compression spring acts on the left end of the locking piece;

[0008] The lower right end of the gear slider is a wedge-shaped structure, the left side of the locking piece is provided with a latching tooth, the right end of the locking piece has a protrusion, and the left side of the gear slider is provided with an oblique groove. Under the elastic force of the second compression spring, the latching tooth abuts against the left end of the gear slider, and the oblique groove cooperates with the latching tooth;

[0009] A row of ratchet grooves and guide rail grooves are arranged on the left side of the right seat body, the guide rail grooves are located above the ratchet grooves, and the rear side of the guide rail grooves is a first inclined surface structure;

[0010] The side wall of the short tube is provided with two through holes, and the right end of the gear slider and the right end of the locking piece respectively pass outward from the two through holes of the short tube, the lower right end of the gear slider can move in a row of ratchet grooves, and the upper right end of the gear slider and the right end protrusion of the locking piece can move in the guide rail groove;

[0011] A square cover plate is fixed on the swing seat by screws, and the square cover plate is used for covering the upper end of the short pipe piece.

[0012] Further, the armrest base is arranged on the swivel seat, and the armrest base and the swivel seat can rotate relative to each other, a pivot bolt and a swivel inner sleeve are fixed to the bottom of the armrest base, the pivot bolt is located in the swivel inner sleeve, a swivel outer sleeve is fixed to the top surface of the swivel seat, the swivel inner sleeve is located in the swivel outer sleeve, and the armrest base is rotatably connected to the swivel seat through the pivot bolt;

[0013] A plurality of semicircular positioning grooves are provided on the bottom surface of the armrest base, and all the semicircular positioning grooves are arranged in a circular array around the center of the bottom surface of the armrest base. Two pin sleeves are fixed on the top surface of the swivel seat, and first spring positioning pins are arranged in the two pin sleeves. The first spring positioning pins include a third compression spring and a pin body portion, and the third compression spring acts on the pin body portion. The upper ends of the pin bodies of the two first spring positioning pins are located in two of the semicircular positioning grooves.

[0014] Two limit blocks are fixed on the bottom inner circle of the handrail base, and the central angle between the two limit blocks is 225 degrees. A stop block is fixed on the top surface of the swivel seat, and the stop block is located between the two limit blocks.

[0015] Furthermore, a support tube is fixed on the mounting seat, a guide tube is fixed on the outer wall of the support tube, an inner plug rod and a lifting outer tube are fixed on the bottom of the swivel seat, the lifting outer tube is sleeved on the outside of the guide tube, the inner plug rod is inserted in the support tube, a lifting clamp is fixed in the support tube, and the lifting clamp cooperates with the inner plug rod;

[0016] The inner insertion rod has a long through opening, and a ratchet guide rail is arranged on the side wall of the long through opening. The ratchet guide rail is composed of a ratchet part and a guide rail part, and the ratchet part and the guide rail part are arranged side by side. The lifting clamping member includes a left half and a right half, and the left half is fixedly connected with the right half. The right half is provided with a pawl groove, and a pawl member is installed in the pawl groove. The inner insertion rod passes through the area between the left half and the right half, and the pawl member cooperates with the ratchet guide rail.

[0017] A pivot body is provided in the middle and lower part of the pawl groove, and a hinge groove is provided in the middle and lower part of the pawl member. The pivot body cooperates with the hinge groove, and the pawl member can swing around the pivot body. A fourth compression spring is also provided between the pawl member and the inner wall of the pawl groove. The lower part of the pawl member is an upper limit hook, the upper part of the pawl member is a hook structure, and the upper part of the pawl groove is a slot, which cooperates with the hook structure. The middle and upper part of the pawl member is a pawl and a clutch member, which are arranged side by side, the pawl can move unidirectionally on the ratchet portion, and the clutch member moves on the guide rail portion, and the lower part of the guide rail portion is a second inclined surface structure.

[0018] Further, the handrail assembly includes a rotating inner frame and a horizontal base, a groove wheel is fixed on the top surface of the swing seat, the rotating inner frame is located on the top surface of the swing seat, and the rotating inner frame can rotate around the groove wheel, four installation positions are arranged on the rotating inner frame, each installation position is provided with a second spring positioning pin, and the second spring positioning pin has the same structure as the first spring positioning pin; wherein two installation positions are respectively located on opposite sides of the groove wheel, and the second spring positioning pins on the two installation positions are matched with the groove wheel;

[0019] The horizontal base is arranged on the top surface of the swing seat, and a long hole is opened at the bottom of the horizontal base, the groove wheel is located in the long hole, a horizontal slide groove is arranged on the horizontal base, the rotating inner frame is located in the horizontal slide groove, and the rotating inner frame can slide relatively in the horizontal slide groove, and a row of wave tooth grooves are arranged on the opposite side walls of the horizontal slide groove, and the second spring positioning pins on the other two installation positions are matched with the two rows of wave tooth grooves respectively;

[0020] The top buckle cover of the horizontal base is provided with an inner cover, the outer periphery of the horizontal base is provided with an armrest pad, and the inner cover is located in the armrest pad.

[0021] Furthermore, the groove wheel includes a fixing bolt, a groove wheel body and a spline wheel. The spline wheel is fixed to the top surface of the swing seat. A spline groove is provided at the bottom of the groove wheel body. The spline groove is adapted to the spline wheel. The groove wheel body is provided on the spline wheel. The fixing bolt is used to fix the groove wheel body and the spline wheel. The outer periphery of the groove wheel body is evenly distributed with wheel grooves, which cooperate with the second spring locating pin.

[0022] Compared with the prior art, the beneficial effects of the utility model are as follows: the multi-directional adjustable armrest of the utility model can be adjusted at multiple angles and in multiple directions to meet the user's usage needs. For example, the upward angle adjustment of the armrest assembly is achieved through the cooperation between the swing seat and the upturned base, the height adjustment of the armrest assembly is achieved through the cooperation between the lifting clamp and the inner insert rod, and the rotation of the armrest assembly is achieved through the cooperation between the armrest base and the swivel seat. In addition, the armrest assembly can also rotate 360° and slide back and forth to adjust; the multi-directional adjustment improves the comfort of the armrest to achieve the best usage state. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the structure of a multi-directional adjustable armrest of the utility model;

[0025] Figure 2 This is an exploded view of a multi-directional adjustable armrest of the utility model;

[0026] Figure 3 It is a schematic diagram of the connection between the armrest base and the swing seat;

[0027] Figure 4 This is the exploded view of the connection between the armrest base and the swing seat;

[0028] Figure 5 An exploded view of the gear slider and the locking member located in the upturned base;

[0029] Figure 6 This is the axonometric view of the swing seat;

[0030] Figure 7 It is a top view of the swing seat;

[0031] Figure 8 This is the axonometric view of the handrail base;

[0032] Fig. 9 It is a structural schematic diagram of the swivel seat;

[0033] Fig.10 It is a schematic diagram of the connection between the swivel seat and the mounting seat;

[0034] Fig.11 This is the exploded view of the connection between the swivel seat and the mounting seat;

[0035] Fig.12 It is a schematic diagram of the assembly of the inner rod and the ratchet member;

[0036] Fig.13It is an assembly schematic diagram with the pawl member located at the right half;

[0037] Fig.14 is an axonometric view of the pawl member located on the inner insertion rod;

[0038] Fig.15 is an axonometric view from another perspective showing the pawl member being located on the inner rod;

[0039] Fig.16 This is an exploded view of the handrail assembly;

[0040] Fig.17 This is an exploded view of the sheave. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] The present invention is further described in detail below in conjunction with the embodiments.

[0043] A specific embodiment of a multi-directional adjustable armrest provided by the utility model:

[0044] like Figure 1-4 As shown, a multi-directionally adjustable armrest comprises a mounting base 1 and an armrest assembly 2, the mounting base 1 is used to mount the multi-directionally adjustable armrest on a seat, an armrest base 3 is arranged on the mounting base 1, a base groove 4 is arranged on the upper portion of the armrest base 3, the base groove 4 is used to mount an upturned base 5, the top surface of the upturned base 5 and the top surface of the armrest base 3 are located on the same arc surface, a swing seat 6 is mounted on the upturned base 5, the swing seat 6 can slide back and forth along the top surface of the upturned base 5, and the armrest assembly 2 is mounted on the swing seat 6; through the cooperation of the swing seat 6 and the upturned base 5, the upturned angle of the armrest assembly 2 can be adjusted to meet the needs of the user.

[0045] like Figure 5-7 As shown, the upturned base 5 is composed of a left base body 7 and a right base body 8, which are respectively fixed in the base groove 4 by screws, and a passing area 9 is formed between the left base body 7 and the right base body 8. The bottom surface of the swing seat 6 is a curved surface structure, and the bottom surface of the swing seat 6 is adapted to the curvature of the top surface of the upturned base 5. The bottom surface of the swing seat 6 is fixed with a limiting arc plate 11 through a short pipe 10, and the short pipe 10 passes through the passing area 9, and the limiting arc plate 11 is located below the passing area 9. The setting of the limiting arc plate 11 can limit the swing seat 6 on the upturned base 5;

[0046] The short tube 10 is provided with a slider groove 12 and a locking groove 13. A gear slider 14 is provided in the slider groove 12. The gear slider 14 can move in the slider groove 12 in the left and right directions. A first compression spring 15 is also provided in the slider groove 12. The first compression spring 15 acts on the left end of the gear slider 14. A locking piece 16 is provided in the locking groove 13. The locking piece 16 is in the locking groove 13 and can swing back and forth around its middle part. A second compression spring 17 is also provided in the locking groove 13. The second compression spring 17 acts on the left end of the locking piece 16. Under the elastic force of the second compression spring 17, the left end of the locking piece 16 abuts against the left end of the gear slider 14.

[0047] The lower right end of the gear slider 14 is a wedge-shaped structure 18, the left side of the locking member 16 is provided with a latching tooth 19, the right end of the locking member 16 has a protrusion 20, and the left side of the gear slider 14 is provided with an oblique groove 21, which matches the latching tooth 19;

[0048] A row of ratchet grooves 22 and guide rail grooves 23 are arranged on the left side of the right seat body 8. The guide rail grooves 23 are located above the ratchet grooves 22. The rear side of the guide rail grooves 23 is a first inclined surface structure 24.

[0049] The side wall of the short tube 10 is provided with two through holes 25, and the right end of the gear slider 14 and the right end of the locking member 16 respectively pass outward from the two through holes 25 of the short tube 10, and the lower right end of the gear slider 14 can move in a row of ratchet grooves 22, and the upper right end of the gear slider 14 and the right end protrusion 20 of the locking member 16 can move in the guide groove 23;

[0050] A square cover plate 26 is fixed on the swing seat 6 by screws. The square cover plate 26 is used to cover the upper end of the short pipe member 10 .

[0051] The working principle of the upward tilting of the armrest assembly 2 is as follows: the swing seat 6 slides backward along the top surface of the upward tilting base 5, and the top surface of the upward tilting base 5 is on an arc surface, so when the swing seat 6 slides backward, the armrest assembly 2 is in an upward tilting state, and in the process of the swing seat 6 sliding backward, the short tube 10 moves in the passing area 9, and the gear slider 14 in the short tube 10 slides through a row of ratchet grooves 22, and the lower right end of the gear slider 14 is a wedge-shaped structure 18, and the wedge-shaped structure 18 cooperates with the ratchet groove 22 to realize unidirectional movement; whenever the wedge-shaped structure 18 enters a ratchet groove 22, the armrest assembly 2 can be adjusted to different upward tilting angles.

[0052] Description of the reset process of the armrest assembly 2: Slide the swing seat 6 backward, and the upper right end of the gear slider 14 slides on the guide groove 23. Since the rear part of the guide groove 23 is a first inclined surface structure 24, the right end of the gear slider 14 will be pushed to move to the left under the limitation of the first inclined surface structure 24. After the gear slider 14 moves, on the one hand, the wedge-shaped structure 18 at the lower right end of the gear slider 14 disengages from the ratchet groove 22, and on the other hand, the left end of the gear slider 14 moves to the left and compresses the first compression spring 15, and the left end of the locking member 16 abuts against the left end of the gear slider 14. Due to the change in the position of the gear slider 14, the latching tooth 19 on the left side of the locking member 16 will enter the inclined structure 18 at the left side of the gear slider 14. Slot 21, the latching tooth 19 forms a latching structure with the oblique slot 21 to prevent the gear slider 14 from resetting under the elastic force of the first compression spring 15. At this time, the swing seat 6 can be slid forward to reset the armrest assembly 2. As the swing seat 6 moves forward, the protrusion 20 at the right end of the locking member 16 slides forward in the guide groove 23, and finally the front end of the guide groove 23 pushes the protrusion 20, so that the locking member 16 rotates a certain angle around its center. After the locking member 16 rotates, the latching tooth 19 of the locking member 16 disengages from the oblique slot 21 to the outside, releasing the latching state of the gear slider 14. Under the elastic force of the first compression spring 15, the gear slider 14 slides to the right, and finally the wedge-shaped structure 18 re-enters the ratchet slot 22 on the front side.

[0053] The armrest assembly 2 of this embodiment can also be rotated 180° outwards around the armrest base 3, or rotated 45° inwards. The specific structure is as follows: Figure 8 and Fig. 9 As shown, the swing seat 6 and the armrest assembly 2 are both arranged on the armrest base 3, the armrest base 3 is arranged on the swivel seat 27, and the armrest base 3 and the swivel seat 27 can rotate relative to each other, the bottom of the armrest base 3 is fixed with a pivot bolt 28 and a swivel inner sleeve 29, the pivot bolt 28 is located in the swivel inner sleeve 29, the top surface of the swivel seat 27 is fixed with a swivel outer sleeve 30, the swivel inner sleeve 29 is located in the swivel outer sleeve 30, and the armrest base 3 is rotatably connected with the swivel seat 27 through the pivot bolt 28;

[0054] A plurality of semicircular positioning grooves 31 are provided on the bottom surface of the armrest base 3, and all the semicircular positioning grooves 31 are arranged in a circular array around the center of the bottom surface of the armrest base 3. Two pin sleeves 32 are fixed on the top surface of the swivel seat 27, and first spring positioning pins 33 are arranged in the two pin sleeves 32. The first spring positioning pin 33 includes a third compression spring 34 and a pin body 35. The third compression spring 34 acts on the pin body 35. The upper ends of the pin bodies 35 of the two first spring positioning pins 33 are located in two of the semicircular positioning grooves 31.

[0055] Two limit blocks 36 are fixed to the inner circle of the bottom of the armrest base 3 , and the central angle between the two limit blocks 36 is 225°. A stop block 37 is fixed to the top surface of the swivel seat 27 , and the stop block 37 is located between the two limit blocks 36 .

[0056] The armrest base 3 can be rotated on the swivel seat 27 through the connection of the pivot bolt 28, and due to the setting of the stop block 37 and the two limit blocks 36, the stop block 37 can only move between the two limit blocks 36, thereby limiting the rotation angle range of the armrest base 3 on the swivel seat 27; the setting of the other two first spring locating pins 33 facilitates the adjustment of different rotation angles of the armrest assembly 2.

[0057] The armrest assembly 2 of this embodiment can also be raised and lowered for adjustment. Figure 10-15 As shown, a support tube 38 is fixed on the mounting seat 1, a guide tube 39 is fixed on the outer wall of the support tube 38, an inner plug rod 40 and a lifting outer tube 41 are fixed on the bottom of the swivel seat 27, the lifting outer tube 41 is sleeved on the outside of the guide tube 39, the lifting outer tube 41 can slide up and down along the guide tube 39, the inner plug rod 40 is inserted in the support tube 38, and a lifting clamp 42 is fixed in the support tube 38, and the lifting clamp 42 cooperates with the inner plug rod 40;

[0058] The inner rod 40 has a long through opening, and a ratchet guide rail 43 is arranged on the side wall of the long through opening. The ratchet guide rail 43 is composed of a ratchet portion 44 and a guide rail portion 45. The ratchet portion 44 and the guide rail portion 45 are arranged side by side. The lifting clamping member 42 includes a left half and a right half 46. The left half is fixedly connected to the right half 46. The right half 46 is provided with a pawl groove 47. A pawl member 48 is installed in the pawl groove 47. The inner rod 40 passes through the area between the left half and the right half 46. The pawl member 48 cooperates with the ratchet guide rail 43.

[0059] A pivot body 49 is provided at the middle and lower part of the pawl groove 47, and a hinge groove 50 is provided at the middle and lower part of the pawl member 48. The pivot body 49 cooperates with the hinge groove 50, and the pawl member 48 can swing around the pivot body 49. A fourth compression spring 51 is also provided between the pawl member 48 and the inner wall of the pawl groove 47. The lower part of the pawl member 48 is an upper limit hook 52, the upper part of the pawl member 48 is a hook structure 53, and the upper part of the pawl groove 47 is a slot 54, which cooperates with the hook structure 53. The middle and upper part of the pawl member 48 is a pawl 55 and a clutch member 56, which are arranged side by side. The pawl 55 can move unidirectionally on the ratchet portion 44, and the clutch member 56 is movable on the guide rail portion 45. The lower part of the guide rail portion 45 is a second inclined surface structure 57.

[0060] The lifting and lowering adjustment process of the armrest assembly 2 is as follows: pull the armrest assembly 2 upward, the armrest assembly 2 moves upward together with the swing seat 6, the armrest base 3 and the swivel seat 27, the swivel seat 27 pulls the inner rod 40 and the lifting outer tube 41 upward, the lifting outer tube 41 slides upward along the guide tube 39, and while the inner rod 40 moves upward, the inner rod 40 is pulled upward from the lifting clamp 42, and the pawl 55 48 cooperates with the ratchet guide rail 43 of the inner rod 40, wherein the pawl 55 of the pawl 55 48 and the ratchet part 44 form a ratchet structure to realize unidirectional movement, and the inner rod 40 will not fall.

[0061] The reset process of the armrest assembly 2 is as follows: the armrest assembly 2 is pulled upward, and the pawl 55 piece 48 slides on the ratchet guide rail 43. Specifically, the clutch piece 56 in the upper middle part of the pawl 55 piece 48 moves on the guide rail portion 45, and the pawl 55 moves on the ratchet portion 44. As the inner rod 40 moves upward, the clutch piece 56 reaches the lower part of the guide rail portion 45. Since the lower part of the guide rail portion 45 is a second inclined surface structure 57, the second inclined surface structure 57 pushes the guide rail portion 45 on the one hand, so that the pawl 55 piece 48 rotates around the pivot body 49. After the pawl 55 piece 48 rotates, the pawl 55 disengages from the ratchet portion 44 at the same time. On the other hand, the second inclined surface structure 57 also lifts the pawl 55 piece 48, so that the pawl 55 piece 48 moves upward in the pawl 55 groove 47 Finally, the hook structure 53 on the upper part of the pawl 55 piece 48 enters the slot 54, and the pawl 55 piece 48 cannot rotate around the pivot column 49. At this time, the armrest assembly 2 can be pressed downward smoothly, so that the armrest assembly 2 and the inner plug rod 40 are reset. As the inner plug rod 40 is reset, the upper end of the guide rail portion 45 contacts the clutch member 56, and the upper end of the guide rail portion 45 applies force downward to the clutch member 56. The pawl 55 piece 48 moves downward in the pawl 55 groove 47, so that the hook structure 53 escapes from the slot 54. Under the elastic force of the fourth compression spring 51, the pawl 55 piece 48 rotates around the pivot column 49 again, and the pawl 55 can enter the ratchet portion 44. The pawl 55 and the ratchet portion 44 form a ratchet structure to complete the downward limitation of the inner plug rod 40.

[0062] like Fig.16 and 17 As shown, the handrail assembly 2 of this embodiment includes a rotating inner frame 58 and a horizontal base 59, a groove wheel 60 is fixed on the top surface of the swing seat 6, the rotating inner frame 58 is located on the top surface of the swing seat 6, and the rotating inner frame 58 can rotate around the groove wheel 60, and four installation positions are provided on the rotating inner frame 58, each installation position is provided with a second spring positioning pin 61, and the second spring positioning pin 61 has the same structure as the first spring positioning pin 33; wherein two installation positions are respectively located on opposite sides of the groove wheel 60, and the second spring positioning pins 61 on the two installation positions are matched with the groove wheel 60;

[0063] The horizontal base 59 is arranged on the top surface of the swing seat 6, and a long hole 62 is opened at the bottom of the horizontal base 59. The groove wheel 60 is located in the long hole 62. A horizontal slide groove 63 is arranged on the horizontal base 59. The rotating inner frame 58 is located in the horizontal slide groove 63, and the rotating inner frame 58 can slide relatively in the horizontal slide groove 63. A row of wave tooth grooves 64 are arranged on the opposite side walls of the horizontal slide groove 63, and the second spring positioning pins 61 on the other two installation positions are respectively matched with the two rows of wave tooth grooves 64;

[0064] The top of the horizontal base 59 is covered with an inner cover 65 , and an armrest pad 66 is provided on the outer periphery of the horizontal base 59 , and the inner cover 65 is located inside the armrest pad 66 .

[0065] The armrest assembly 2 of this embodiment can rotate freely on one hand, and can slide forward and backward on the other hand. The specific working process is as follows: the armrest pad 66 is used to support the user's arm. The armrest pad 66 is wrapped around the outer periphery of the horizontal base 59. When the armrest pad 66 is rotated, the horizontal base 59 is rotated together. The rotating inner frame 58 is located on the horizontal base 59, so the rotating inner frame 58 follows the horizontal base 59 to rotate around the groove wheel 60. During the rotation process, two second spring positioning pins 61 cooperate with the groove wheel 60 to achieve positioning after rotation;

[0066] When the armrest pad 66 is pushed in the horizontal direction, the horizontal base 59 moves together with it, and the horizontal base 59 moves relative to the swing seat 6, while the rotating inner frame 58 on the horizontal base 59 is also arranged on the groove wheel 60, so the horizontal base 59 and the rotating inner frame 58 rotate relative to each other. During the movement of the horizontal base 59, the other two spring positioning pins cooperate with the two rows of wave tooth grooves 64 to complete the positioning after the horizontal movement.

[0067] In this embodiment, the groove wheel 60 is fixed on the top surface of the swing seat 6, and the groove wheel 60 is inserted into the long hole 62 of the horizontal base 59, the groove wheel 60 and the long hole 62 can move relatively, and the rotating inner frame 58 is arranged on the groove wheel 60 and can rotate around the groove wheel 60; the groove wheel 60 includes a fixing bolt 67, a groove wheel body 68 and a spline wheel 69, the spline wheel 69 is fixed on the top surface of the swing seat 6, and the bottom of the groove wheel body 68 is provided with a spline groove 70, the spline groove 70 is adapted to the spline wheel 69, the groove wheel body 68 is arranged on the spline wheel 69, the fixing bolt 67 is used to fix the groove wheel body 68 and the spline wheel 69, and the outer periphery of the groove wheel body 68 is evenly distributed with wheel grooves, and the wheel grooves are matched with the second spring locating pin 61.

[0068] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0069] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-directional adjustable armrest, characterized in that: It comprises a mounting seat and an armrest assembly, wherein the mounting seat is provided with an armrest base, the armrest base is provided with a base groove, the base groove is used to install an upturned base, the top surface of the upturned base and the top surface of the armrest base are located on the same arc surface, a swing seat is installed on the upturned base, the swing seat can slide back and forth along the top surface of the upturned base, and the armrest assembly is installed on the swing seat; The upturned base is composed of a left base body and a right base body, which are respectively fixed in the base groove by screws, and a passing area is formed between the left base body and the right base body. The bottom surface of the swing base is an arc surface structure, and the bottom surface of the swing base is adapted to the curvature of the top surface of the upturned base. The bottom surface of the swing base is fixed with a limited arc plate by a short pipe fitting, and the short pipe fitting passes through the passing area, and the limited arc plate is located below the passing area; A slider groove and a locking groove are provided in the short tube, a gear slider is provided in the slider groove, the gear slider can move in the slider groove in the left and right directions, a first compression spring is also provided in the slider groove, the first compression spring acts on the left end of the gear slider, a locking piece is provided in the locking groove, the locking piece is in the locking groove and can swing back and forth around its middle part, a second compression spring is also provided in the locking groove, the second compression spring acts on the left end of the locking piece; The lower right end of the gear slider is a wedge-shaped structure, the left side of the locking piece is provided with a latching tooth, the right end of the locking piece has a protrusion, and the left side of the gear slider is provided with an oblique groove. Under the elastic force of the second compression spring, the latching tooth abuts against the left end of the gear slider, and the oblique groove cooperates with the latching tooth; A row of ratchet grooves and guide rail grooves are arranged on the left side of the right seat body, the guide rail grooves are located above the ratchet grooves, and the rear side of the guide rail grooves is a first inclined surface structure; The side wall of the short tube is provided with two through holes, and the right end of the gear slider and the right end of the locking piece respectively pass outward from the two through holes of the short tube, the lower right end of the gear slider can move in a row of ratchet grooves, and the upper right end of the gear slider and the right end protrusion of the locking piece can move in the guide rail groove; A square cover plate is fixed on the swing seat by screws, and the square cover plate is used for covering the upper end of the short pipe piece.

2. The multi-directional adjustable armrest according to claim 1, characterized in that: The armrest base is arranged on the swivel seat, and the armrest base and the swivel seat can rotate relative to each other. A pivot bolt and a swivel inner sleeve are fixed to the bottom of the armrest base, the pivot bolt is located in the swivel inner sleeve, a swivel outer sleeve is fixed to the top surface of the swivel seat, the swivel inner sleeve is located in the swivel outer sleeve, and the armrest base is rotatably connected to the swivel seat through the pivot bolt; A plurality of semicircular positioning grooves are provided on the bottom surface of the armrest base, and all the semicircular positioning grooves are arranged in a circular array around the center of the bottom surface of the armrest base. Two pin sleeves are fixed on the top surface of the swivel seat, and first spring positioning pins are arranged in the two pin sleeves. The first spring positioning pins include a third compression spring and a pin body portion, and the third compression spring acts on the pin body portion. The upper ends of the pin bodies of the two first spring positioning pins are located in two of the semicircular positioning grooves. Two limit blocks are fixed on the bottom inner circle of the handrail base, and the central angle between the two limit blocks is 225 degrees. A stop block is fixed on the top surface of the swivel seat, and the stop block is located between the two limit blocks.

3. The multi-directional adjustable armrest according to claim 2, characterized in that: A support tube is fixed on the mounting seat, a guide tube is fixed on the outer wall of the support tube, an inner plug rod and a lifting outer tube are fixed on the bottom of the swivel seat, the lifting outer tube is sleeved on the outside of the guide tube, the inner plug rod is inserted in the support tube, a lifting clamp is fixed in the support tube, and the lifting clamp cooperates with the inner plug rod; The inner insertion rod has a long through opening, and a ratchet guide rail is arranged on the side wall of the long through opening. The ratchet guide rail is composed of a ratchet part and a guide rail part, and the ratchet part and the guide rail part are arranged side by side. The lifting clamping member includes a left half and a right half, and the left half is fixedly connected with the right half. The right half is provided with a pawl groove, and a pawl member is installed in the pawl groove. The inner insertion rod passes through the area between the left half and the right half, and the pawl member cooperates with the ratchet guide rail. A pivot body is provided in the middle and lower part of the pawl groove, and a hinge groove is provided in the middle and lower part of the pawl member. The pivot body cooperates with the hinge groove, and the pawl member can swing around the pivot body. A fourth compression spring is also provided between the pawl member and the inner wall of the pawl groove. The lower part of the pawl member is an upper limit hook, the upper part of the pawl member is a hook structure, and the upper part of the pawl groove is a slot, which cooperates with the hook structure. The middle and upper part of the pawl member is a pawl and a clutch member, which are arranged side by side, the pawl can move unidirectionally on the ratchet portion, and the clutch member moves on the guide rail portion, and the lower part of the guide rail portion is a second inclined surface structure.

4. The multi-directional adjustable armrest according to claim 3, characterized in that: The handrail assembly includes a rotating inner frame and a horizontal base, a groove wheel is fixed on the top surface of the swing seat, the rotating inner frame is located on the top surface of the swing seat, and the rotating inner frame can rotate around the groove wheel, four installation positions are arranged on the rotating inner frame, each installation position is provided with a second spring positioning pin, and the second spring positioning pin has the same structure as the first spring positioning pin; two installation positions are respectively located on opposite sides of the groove wheel, and the second spring positioning pins on the two installation positions are matched with the groove wheel; The horizontal base is arranged on the top surface of the swing seat, and a long hole is opened at the bottom of the horizontal base, the groove wheel is located in the long hole, a horizontal slide groove is arranged on the horizontal base, the rotating inner frame is located in the horizontal slide groove, and the rotating inner frame can slide relatively in the horizontal slide groove, and a row of wave tooth grooves are arranged on the opposite side walls of the horizontal slide groove, and the second spring positioning pins on the other two installation positions are matched with the two rows of wave tooth grooves respectively; The top buckle cover of the horizontal base is provided with an inner cover, the outer periphery of the horizontal base is provided with an armrest pad, and the inner cover is located in the armrest pad.

5. The multi-directional adjustable armrest according to claim 4, characterized in that: The sheave includes a fixing bolt, a sheave body and a spline wheel. The spline wheel is fixed to the top surface of the swing seat. A spline groove is provided at the bottom of the sheave body. The spline groove is adapted to the spline wheel. The sheave body is provided on the spline wheel. The fixing bolt is used to fix the sheave body and the spline wheel. Wheel grooves are evenly distributed on the periphery of the sheave body. The wheel grooves cooperate with the second spring locating pins.

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