A seat armrest and a seat

Abstract

The utility model discloses a seat armrest and seat, the seat armrest includes: support rod, adjusting seat and supporting plate, and the top of support rod is provided with elastic top bead, and the bottom of adjusting seat is provided with a plurality of positioning slots along its rotating axis's periphery, and adjusting seat rotation can drive positioning slot and elastic top bead positioning clamping in turn, adjusting seat includes support disc and swing disc, and support disc is installed at the top of adjusting seat along the vertical direction, and swing disc coaxially swing setting is arranged at one side of support disc, and the outer end of swing disc is connected with the rear end of supporting plate, and swing disc swing can drive supporting plate swing up and down. The utility model embodiment is through setting positioning slot and setting elastic top bead at the top of support rod cooperation, can carry out horizontal swing adjustment to armrest supporting plate, and then through the coaxial swing connection of setting support disc and swing disc, can carry out swing adjustment to armrest supporting plate up and down, can satisfy the diversified use demand of horizontal offset angle and pitch adjustment angle of seat armrest of different users.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to a chair armrest and a chair. Background Technology

[0002] In people's daily lives, we often use chairs, which are usually equipped with armrests. The armrests provide support for the user's arms, making it more comfortable for the user to work or rest in the chair.

[0003] Different users have different habits when using seats. However, the existing seat armrests have limited adjustability and cannot well meet the diverse needs of different users for the horizontal offset angle and tilt adjustment angle of the seat armrests. Utility Model Content

[0004] In view of this, the present invention provides a seat armrest and a seat to solve the problem that the existing seat armrests have limited range and cannot well meet the diverse usage needs of different users for the horizontal offset angle and pitch adjustment angle of the seat armrests.

[0005] To achieve one or more of the above objectives or other objectives, this utility model proposes: a seat armrest, comprising: a support rod, an adjustment seat, and a support plate, wherein the adjustment seat is installed at the top end of the support rod, and the rear end of the support plate is connected to the adjustment seat; The adjusting seat is rotatably mounted on the top of the support rod in the horizontal direction. The top of the support rod is provided with an elastic ball. The bottom of the adjusting seat is provided with a number of positioning grooves along its rotation axis. The rotation of the adjusting seat can drive the positioning grooves to engage with the elastic ball in sequence. The adjusting seat includes a support plate and a swing plate. The support plate is installed vertically on the top of the adjusting seat. The swing plate is coaxially oscillating on one side of the support plate. The outer end of the swing plate is connected to the rear end of the support plate. The swing plate can drive the support plate to swing up and down.

[0006] Preferably, the support disk has a first and a second protruding locking block spaced apart on its circumferential edge, and a plurality of one-way toothed grooves are evenly distributed between the first and second locking blocks. The swing disk has an adjustment port, and a limit block is movably disposed in the adjustment port. The limit block can abut against the upper end or the lower end of the adjustment port respectively. A plurality of ratchet teeth are provided on one side edge of the limit block, and the ratchet teeth can engage unidirectionally with the one-way toothed grooves. When the swing disk swings counterclockwise, the lower end of the adjustment port drives the limiting block to move counterclockwise upward, so that the ratchet slides along the back of the tooth of the one-way tooth groove, and the pallet can swing upward step by step until the upper end of the limiting block abuts against the first locking block and stops. When the swing disk continues to swing counterclockwise, the lower end of the adjustment port can move the limiting block, causing the ratchet to separate from the one-way tooth groove, so that the swing disk can swing clockwise. When the swing disk swings clockwise, the upper end of the adjustment port drives the limiting block to move clockwise downward, so that the tray can swing downward in one go until the lower end of the limiting block abuts against the second locking block and stops.

[0007] Preferably, the upward angle between the line connecting the axis of the first locking block and the axis of the support disk and the horizontal plane where the axis of the support disk is located is 30°-60°, and the downward angle between the line connecting the axis of the second locking block and the axis of the support disk and the horizontal plane where the axis of the support disk is located is 0°-15°.

[0008] Preferably, the outer end of the swing disk is connected to an extension arm, the front end of the extension arm is provided with a connecting plate, a slide groove is provided in the tray along its length direction, a slider is slidably disposed in the slide groove, and the connecting plate is connected to the slider.

[0009] Preferably, the inner walls of the opposite sides of the slide groove are provided with a plurality of first limiting grooves connected in a wave shape, and the slider is provided with first elastic top blocks symmetrically on both sides, the first elastic top blocks being able to be movably engaged with the first limiting grooves one by one.

[0010] Preferably, the slider has a mounting cavity in the middle, and the connecting disk is rotatably connected in the mounting cavity; The mounting cavity is provided with a second elastic top block on its periphery, and a number of second limiting grooves are evenly spaced on the circumferential sidewall of the connecting plate. The second elastic top block can be movably engaged with the second limiting grooves one by one.

[0011] Preferably, the support rod includes an outer tube and a first inner rod and a second inner rod sleeved inside the outer tube. The first inner rod and the second inner rod are attached to each other and can slide relative to each other in the vertical direction to lengthen or return to their original position.

[0012] Preferably, the inner wall of the first inner rod is provided with a plurality of unidirectional limiting grooves in the shape of a "7" along its length, and the upper end of the inner wall of the second inner rod is provided with a third elastic top block, which has an inclined state and a vertical state. In the tilted state, the third elastic top block can be sequentially adapted and engaged with each of the one-way limiting grooves, so that the first inner rod and the second inner rod can only slide and stretch in one direction. In the vertical position, the third elastic top block separates from the one-way limiting groove, allowing the first inner rod and the second inner rod to slide freely in the vertical direction.

[0013] Preferably, the lowest end of the unidirectional limiting groove is provided with a straightening groove in the vertical direction, the upper end of the second inner rod is provided with a positioning port in the vertical direction, and the third elastic top block is provided with a positioning block; When the third elastic top block slides down into the straightening groove along the lower end of the one-way limiting groove, the positioning block is inserted into the positioning port, and the third elastic top block changes from an inclined state to a vertical state. When the third elastic top block moves vertically upward to the uppermost end of the one-way limiting groove, the positioning block separates from the positioning port, and the third elastic top block changes from a vertical state to an inclined state.

[0014] This utility model also proposes: a seat, including the aforementioned seat armrests.

[0015] Implementing the embodiments of this utility model will have the following beneficial effects: With the above-mentioned armrests, the positioning groove at the bottom of the adjustment seat and the elastic ball at the top of the support rod can be used to adjust the horizontal swing of the armrest support. Furthermore, the support plate at the top of the adjustment seat is coaxially connected to the swing plate to adjust the vertical swing of the armrest support. This can well meet the diverse needs of different users for the horizontal offset angle and pitch adjustment angle of the armrests. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] in: Figure 1 This is a schematic diagram of the overall structure of the armrest of the seat proposed in this utility model; Figure 2 This is a schematic diagram of the exploded structure of the seat armrest proposed in this utility model. Figure 1 ; Figure 3 This is a schematic diagram of the exploded structure of the seat armrest proposed in this utility model. Figure 2 ; Figure 4 This is a schematic diagram showing the connection relationship between the support plate and the swing plate of the seat armrest proposed in this utility model; Figure 5 This is an exploded structural diagram of the support plate and swing plate of the seat armrest proposed in this utility model; Figure 6 This is a schematic diagram showing the state of the support plate and swing plate of the seat armrest proposed in this utility model. Figure 1 ; Figure 7 This is a schematic diagram showing the state of the support plate and swing plate of the seat armrest proposed in this utility model. Figure 2 ; Figure 8 This is a schematic diagram of the internal structure of the support plate of the seat armrest proposed in this utility model; Figure 9 This is a schematic diagram showing the position of the third elastic top block of the seat armrest proposed in this utility model in an inclined state, comparing the positions of the first inner rod and the second inner rod. Figure 10 This is a schematic diagram showing the position of the third elastic top block of the seat armrest proposed in this utility model in a vertical state, comparing the positions of the first inner rod and the second inner rod.

[0018] Reference numerals: 10, Support rod; 101, Elastic top ball; 11, Outer tube; 12, First inner rod; 121, One-way limiting groove; 122, Straightening groove; 13, Second inner rod; 131, Third elastic top block; 132, Positioning port; 133, Positioning block; 134, Limiting port; 135, Stop block; 136, Spring; 20, Adjusting seat; 201, Positioning groove; 21, Support plate; 211, First locking block; 212. Second locking block; 213, one-way toothed groove; 22, swing plate; 221, adjustment port; 222, limiting block; 223, ratchet; 224, spring; 23, extension arm; 24, connecting plate; 241, second limiting groove; 25, coil spring; 30, support plate; 301, soft pad; 31, slide groove; 311, first limiting groove; 32, slider; 321, first elastic top block; 322, mounting cavity; 323, second elastic top block. Detailed Implementation

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0020] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0022] like Figure 1-10 The image shown is an embodiment provided by this utility model.

[0023] This utility model embodiment provides a seat armrest, including: a support rod 10, an adjustment seat 20, and a support plate 30. The lower end of the support rod 10 is used to connect to the seat body to support the seat armrest. The support plate 30 is used to support the seat armrest. A soft pad 301 can be provided on the support plate 30 to increase the comfort of the seat armrest. The adjustment seat 20 is installed at the top of the support rod 10, and the rear end of the support plate 30 is connected to the adjustment seat 20. Specifically, the adjusting seat 20 is rotatably mounted on the top of the support rod 10 in the horizontal direction. For example, it can be rotatably connected by a shaft, bearing, or connecting ball joint. The top of the support rod 10 is provided with an elastic ball 101, which can be composed of a spring 136 and a steel ball, so that the elastic ball 101 has a certain elasticity of vertical extension and contraction. The bottom of the adjusting seat 20 is provided with several positioning grooves 201 along its rotation axis. The rotation of the adjusting seat 20 can drive the positioning grooves 201 to engage with the elastic ball 101 in sequence. One to three elastic balls 101 can be provided and evenly distributed on the top of the support rod 10. There can be 12 to 24 positioning grooves 201. The distance between every two positioning grooves 201 is 15°-30°, so as to realize multi-position rotation adjustment of the tray 30. Meanwhile, the adjustment seat 20 includes a support plate 21 and a swing plate 22. The support plate 21 is fixedly installed on the top of the adjustment seat 20 in a vertical direction. The swing plate 22 is coaxially swinging on one side of the support plate 21 via a rotating shaft, or sandwiched between two support plates 21. The outer end of the swing plate 22 (i.e. the free end of the swing plate 22) is connected to the rear end of the support plate 30. The swing of the swing plate 22 can drive the support plate 30 to swing up and down.

[0024] With the aforementioned armrest, the positioning groove 201 at the bottom of the adjustment seat 20 and the elastic ball 101 at the top of the support rod 10 can be used to adjust the armrest support plate 30 horizontally and lock it at each rotation position. Adjustment only requires a small force to move the support plate 30. Furthermore, the support plate 21 at the top of the adjustment seat 20 is coaxially connected to the swing plate 22, which can adjust the armrest support plate 30 vertically. This can well adapt to the sitting posture habits of different users and meet the diverse needs of different users for the horizontal offset angle and tilt adjustment angle of the armrest.

[0025] Specifically, the support plate 21 has protruding first locking blocks 211 and second locking blocks 212 spaced apart on its circumferential edge. Several unidirectional toothed grooves 213 are evenly distributed between the first locking blocks 211 and the second locking blocks 212. The swing plate 22 has an adjustment port 221. A limiting block 222 is movably arranged in the adjustment port 221. The adjustment port 221 is roughly fan-shaped. The area of ​​the limiting block 222 is smaller than that of the adjustment port 221, but the thickness of the limiting block 222 is similar to or exceeds the depth of the adjustment port 221. The limiting block 222 can abut against the upper end or the lower end of the adjustment port 221 respectively. Several ratchet teeth 223 are provided on one side edge of the limiting block 222. The ratchet teeth 223 can mesh unidirectionally with the unidirectional toothed grooves 213 to form a ratchet and pawl mechanism. The ratchet teeth 223 are equivalent to pawls, and the toothed grooves are equivalent to toothed grooves on a ratchet, so that the ratchet teeth 223 can only exert a unidirectional limiting effect on the toothed grooves. When the swing disk 22 swings counterclockwise, it indicates that the pallet 30 is to be lifted. At this time, the lower end of the adjustment port 221 will lift the limit block 222 and make it move upward counterclockwise. This causes the ratchet 223 to slide along the back of the tooth of the one-way tooth groove 213 and produce a clicking feedback sound. The pallet 30 can swing upward step by step until the upper end of the limit block 222 abuts against the first locking block 211. The pallet 30 can stop at will during the swing. The lifted pallet 30 will not fall under the limit of the ratchet 223 and the tooth groove. In addition, the upward angle between the line connecting the axis of the first locking block 211 and the axis of the support disk 21 and the horizontal plane where the axis of the support disk 21 is located is 30°-60°, which means that the lifting angle of the pallet 30 is in the range of 30°-60°. When the swing disk 22 continues to swing counterclockwise, the lower end of the adjusting port 221 can cooperate with the first locking block 211 to move the limiting block 222. The inclined surfaces that contact each other push the limiting block 222 away from the tooth groove, causing the ratchet 223 to separate from the one-way tooth groove 213. The ratchet 223 and the tooth groove enter an "unlocked state." Please refer to the attached diagram. Figure 6 As shown, in this state, the oscillating disk 22 can oscillate clockwise; After entering the "unlocked state", the swing disk 22 can swing clockwise. When the swing disk 22 swings clockwise, it indicates that the support plate 30 is to be pressed down. At this time, the upper end of the adjusting port 221 will press down the limiting block 222, causing it to move downward clockwise, so that the support plate 30 can swing downward in one go until the lower end of the limiting block 222 abuts against the second locking block 212 and stops. Please refer to the attached document. Figure 7 As shown, the downward angle between the line connecting the axis of the second card block 212 and the axis of the support plate 21 and the horizontal plane where the axis of the support plate 21 is located is 0°-15°, which means that the downward angle of the pallet 30 is in the range of 0°-15°.

[0026] Furthermore, a coil spring 25 is provided on the other side of the support plate 21. The inner end of the coil spring 25 is engaged with the rotating shaft of the support plate 21, and the outer end of the coil spring 25 is connected to the swing plate 22. When the swing plate 22 swings counterclockwise, the coil spring 25 is tightened to store energy, providing increasing resistance to the support plate 30. When the swing plate 22 swings clockwise, the coil spring 25 is released to release energy, assisting the support plate 30 to quickly and smoothly return to its original position.

[0027] Furthermore, a metal or rubber spring 224 is provided inside the adjustment port 221. The spring 224 abuts against the side of the limiting block 222 away from the ratchet 223, and can continuously press against the non-ratchet 223 side of the limiting block 222 to ensure the meshing stability of the ratchet 223 and the one-way tooth groove 213, and avoid disengagement due to vibration.

[0028] Furthermore, an extension arm 23 is connected to the outer end of the swing disk 22 to provide more stable support for the tray 30. A connecting disk 24 is provided at the front end of the extension arm 23. A slide groove 31 is provided inside the tray 30 along its length direction. A slider 32 is slidably arranged in the slide groove 31. The connecting disk 24 is connected to the slider 32, so that the tray 30 can extend or retract along the direction of the extension arm 23 to accommodate different users' arm lengths. Specifically, several first limiting grooves 311 connected in a wave-like pattern are provided on the inner walls of opposite sides of the slide groove 31. First elastic top blocks 321 are symmetrically arranged on both sides of the slider 32. The first elastic top blocks 321 can be movably engaged with the first limiting grooves 311 one by one. When the tray 30 is pushed, the first elastic top blocks 321 elastically engage along the wave-like first limiting grooves 311 to realize multiple length adjustments.

[0029] Specifically, the middle of the slider 32 is provided with an installation cavity 322, and the connecting plate 24 is rotatably connected in the installation cavity 322, so that the tray 30 can rotate around the connecting plate, further improving the adjustability of the tray 30. The periphery of the installation cavity 322 is provided with a second elastic top block 323, and a number of second limiting grooves 241 are evenly spaced on the circumferential sidewall of the connecting plate 24. The second elastic top block 323 can be movably engaged with the second limiting groove 241 one by one. When the tray 30 is rotated, the second elastic top block 323 is elastically engaged along the second limiting groove 241, realizing the adjustment of the rotation angle of multiple gears.

[0030] Furthermore, the support rod 10 includes an outer tube 11 and a first inner rod 12 and a second inner rod 13 sleeved within the outer tube 11. The first inner rod 12 and the second inner rod 13 are attached together and can slide relative to each other in the vertical direction to lengthen or return to their original position, facilitating user adjustment of the height of the handrail support plate 30. Specifically, the inner sidewall of the first inner rod 12 is provided with several "7"-shaped one-way limiting grooves 121 along its length, and all the one-way limiting grooves 121 are arranged continuously end to end. The upper end of the inner sidewall of the second inner rod 13 is provided with a third elastic top block 131. The entire third elastic top block 131 or its upper end can just fit the shape of the "7"-shaped inner corner. The third elastic top block 131 has an inclined state and a vertical state: in the inclined state, please refer to the attached diagram. Figure 9 As shown, the third elastic top block 131 can be sequentially fitted and engaged with each one-way limiting groove 121, allowing the first inner rod 12 and the second inner rod 13 to slide and lengthen only in one direction. Typically, the first inner rod 12 is lifted upwards, and the second inner rod 13 moves downwards relative to the first inner rod 12, causing them to stretch relative to each other. This stretches and fixes the length of the support rod 10, thus adjusting the height of the seat armrest. In the vertical position, please refer to the attached diagram. Figure 10 As shown, the third elastic top block 131 separates from the one-way limiting groove 121, allowing the first inner rod 12 and the second inner rod 13 to slide freely in the vertical direction, which facilitates adjusting the height of the seat armrest.

[0031] Specifically, a straightening groove 122 is vertically arranged at the lowest end of the unidirectional limiting groove 121. The straightening groove 122 is wider at the top and narrower at the bottom. The lower half of the straightening groove 122 is vertically arranged, and its width matches the width of the third elastic top block 131. The upper end of the second inner rod 13 is vertically spaced with a positioning port 132 and a limiting port 134. The opening of the positioning port 132 faces downward, and the opening of the limiting port 134 faces upward. The outer wall of the third elastic top block 131... The device has protruding positioning blocks 133 and stop blocks 135 at both ends. A spring 136 is provided on the side of the third elastic top block 131 away from the one-way limiting groove 121. The positioning block 133 is adapted to the size of the positioning port 132. The stop block 135 and the limiting port 134 are positioned correspondingly. The size of the limiting port 134 is larger than the size of the stop block 135. The third elastic top block 131 is pushed by the elastic force of the spring 136. The third elastic top block 131, positioning block 133 and stop block 135 are tilted towards the positioning port 132. In the normal state, the stop block 135 is inserted into the limiting port 134. When the positioning block 133 is connected to the positioning port 132, the upper and lower ends of the third elastic top block 131 are balanced, keeping it in a vertical state. When the positioning block 133 is separated from the positioning port 132, the upper and lower ends of the third elastic top block 131 become unbalanced, and its upper end tilts outward under the action of the spring 136, causing the third elastic top block 131 to be in an inclined state. In the initial and normal states, the third elastic top block 131... The third elastic top block 131 is in an inclined state; when the third elastic top block 131 slides down into the straightening groove 122 along the lower end of the one-way limiting groove 121, the positioning block 133 is inserted into the positioning port 132, so that the third elastic top block 131 changes from an inclined state to a vertical state; when the third elastic top block 131 moves upward in the vertical direction to the uppermost end of the one-way limiting groove 121, the positioning block 133 separates from the positioning port 132, and the third elastic top block 131 changes from a vertical state to an inclined state.

[0032] This utility model embodiment also provides a seat, including the aforementioned seat armrests.

[0033] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A type of armrest for a seat, characterized in that, include: The support rod (10), the adjusting seat (20) and the tray (30) are provided. The adjusting seat (20) is installed at the top of the support rod (10), and the rear end of the tray (30) is connected to the adjusting seat (20). The adjusting seat (20) is rotatably mounted on the top of the support rod (10) in the horizontal direction. The top of the support rod (10) is provided with an elastic top ball (101). The bottom of the adjusting seat (20) is provided with a plurality of positioning grooves (201) along its rotation axis. The rotation of the adjusting seat (20) can drive the positioning grooves (201) to be sequentially positioned and engaged with the elastic top ball (101). The adjusting seat (20) includes a support plate (21) and a swing plate (22). The support plate (21) is installed vertically on the top of the adjusting seat (20). The swing plate (22) is coaxially oscillating on one side of the support plate (21). The outer end of the swing plate (22) is connected to the rear end of the support plate (30). The swing plate (22) can drive the support plate (30) to swing up and down.

2. The armrest of the seat according to claim 1, characterized in that, The support disk (21) has a first locking block (211) and a second locking block (212) that are spaced apart on its circumferential edge. A plurality of one-way toothed grooves (213) are evenly distributed between the first locking block (211) and the second locking block (212). The swing disk (22) has an adjustment port (221). A limit block (222) is movably arranged in the adjustment port (221). The limit block (222) can abut against the upper end or the lower end of the adjustment port (221) respectively. A plurality of ratchet teeth (223) are provided on one side edge of the limit block (222). The ratchet teeth (223) can engage with the one-way toothed grooves (213) in one direction. When the swing disk (22) swings counterclockwise, the lower end of the adjustment port (221) drives the limiting block (222) to move counterclockwise upward, so that the ratchet (223) slides along the back of the tooth of the one-way tooth groove (213), so that the pallet (30) can swing upward step by step until the upper end of the limiting block (222) abuts against the first locking block (211) and stops. When the swing disk (22) continues to swing counterclockwise, the lower end of the adjustment port (221) can move the limiting block (222), so that the ratchet (223) separates from the one-way tooth groove (213), and the swing disk (22) can swing clockwise. When the swing disk (22) swings clockwise, the upper end of the adjustment port (221) drives the limiting block (222) to move clockwise downward, so that the tray (30) can swing downward at once until the lower end of the limiting block (222) abuts against the second locking block (212) and stops.

3. The armrest of the seat according to claim 2, characterized in that, The upward angle between the line connecting the axis of the first locking block (211) and the axis of the support disk (21) and the horizontal plane where the axis of the support disk (21) is located is 30°-60°, and the downward angle between the line connecting the axis of the second locking block (212) and the axis of the support disk (21) and the horizontal plane where the axis of the support disk (21) is located is 0°-15°.

4. The armrest of the seat according to claim 1, characterized in that, The outer end of the swing disk (22) is connected to an extension arm (23), and the front end of the extension arm (23) is provided with a connecting disk (24). The tray (30) is provided with a groove (31) along its length direction, and a slider (32) is slidably arranged in the groove (31). The connecting disk (24) is connected to the slider (32).

5. The armrest of the seat according to claim 4, characterized in that, The inner walls of the opposite sides of the slide (31) are provided with a plurality of first limiting grooves (311) connected in a wave shape. The slider (32) is provided with first elastic top blocks (321) on both sides. The first elastic top blocks (321) can be movably engaged with the first limiting grooves (311) one by one.

6. The armrest of the seat according to claim 5, characterized in that, The slider (32) has a mounting cavity (322) in the middle, and the connecting plate (24) is rotatably connected in the mounting cavity (322); The mounting cavity (322) is provided with a second elastic top block (323) on its periphery, and a number of second limiting grooves (241) are evenly spaced on the circumferential sidewall of the connecting plate (24). The second elastic top block (323) can be movably engaged with the second limiting groove (241) one by one.

7. The armrest of the seat according to claim 1, characterized in that, The support rod (10) includes an outer tube (11) and a first inner rod (12) and a second inner rod (13) sleeved inside the outer tube (11). The first inner rod (12) and the second inner rod (13) are attached to each other and can slide and stretch or reset relative to each other in the vertical direction.

8. The armrest of the seat according to claim 7, characterized in that, The inner wall of the first inner rod (12) is provided with a plurality of unidirectional limiting grooves (121) in the shape of a "7" downward along its length direction. The upper end of the inner wall of the second inner rod (13) is provided with a third elastic top block (131), which has an inclined state and a vertical state. In the tilted state, the third elastic top block (131) can be adapted and engaged with each of the one-way limiting grooves (121) in sequence, so that the first inner rod (12) and the second inner rod (13) can only slide and stretch in one direction; In the vertical position, the third elastic top block (131) separates from the one-way limiting groove (121), allowing the first inner rod (12) and the second inner rod (13) to slide freely in the vertical direction.

9. The armrest of the seat according to claim 8, characterized in that, The lowest end of the unidirectional limiting groove (121) is provided with a straightening groove (122) in the vertical direction, the upper end of the second inner rod (13) is provided with a positioning port (132) in the vertical direction, and the third elastic top block (131) is provided with a positioning block (133). When the third elastic top block (131) slides down into the straightening groove (122) along the lower end of the one-way limiting groove (121), the positioning block (133) is inserted into the positioning port (132), and the third elastic top block (131) changes from an inclined state to a vertical state. When the third elastic top block (131) moves vertically upward to the uppermost end of the one-way limiting groove (121), the positioning block (133) separates from the positioning port (132), and the third elastic top block (131) changes from a vertical state to an inclined state.

10. A type of seat, characterized in that, Includes the seat armrest as described in any one of claims 1-9.

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