Armrest and seat

Abstract

The utility model discloses an armrest and a seat. The armrest comprises a connecting arm, a connecting rod and a connecting rod, the connecting sleeve is arranged on the outer side of the connecting arm in a sleeving mode, and the connecting sleeve can move on the connecting arm in the vertical direction and be positioned; the bottom end of the lower supporting arm is rotationally connected to the top end of the connecting sleeve, the lower supporting arm can rotate and be positioned along the axis in the vertical direction, and the middle of the lower supporting arm extends in the front-back direction; a sliding part is connected to the interior of the armrest shell in a sliding mode in the front-back direction, the top end of the lower supporting arm penetrates through the bottom side of the armrest shell and is rotationally connected to the sliding part, and the sliding part can rotate and be positioned along the axis extending in the up-down direction. The front-back position of the armrest shell can be adjusted according to different sitting postures, the flexibility is high, different use requirements can be better met, and the use experience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of furniture, in particular to a handrail and seat. BACKGROUND

[0002] In order to improve the use experience of the seat, some seats will be installed with handrails, which can support the hands of the user. The height and position of the conventional handrail structure cannot be changed, which is difficult to adapt to users of different body types or different body positions. Some handrails have lifting or rotating adjustment functions, but the flexibility of use adjustment is low, which is difficult to meet the use needs of people. Therefore, there is an urgent need for a handrail that can improve the use flexibility. SUMMARY

[0003] The utility model aims to provide a kind of handrail and seat to solve one or more technical problems existing in the prior art, at least provide a kind of beneficial choice or create conditions.

[0004] The utility model solves the technical problem of the solution:

[0005] A handrail, comprising: a connecting arm; a connecting sleeve, which is sleeved outside the connecting arm and can move up and down on the connecting arm and be positioned; a lower supporting arm, the bottom end of which is rotationally connected to the top end of the connecting sleeve, and the lower supporting arm can rotate and be positioned along the axis in the up-down direction, and the middle part of the lower supporting arm extends in the front-back direction; a handrail shell, the inside of which is slidingly connected with a sliding piece in the front-back direction, and the top end of the lower supporting arm passes through the bottom side of the handrail shell and is rotationally connected to the sliding piece, and the sliding piece can rotate and be positioned along the axis extending in the up-down direction.

[0006] The technical solution has at least the following beneficial effects: the connecting arm is used to connect to the seat of the external device, so that the entire handrail is relatively connected and fixed to the seat, and the handrail shell is used to support the hands of the user. During use, the connecting sleeve can be moved up and down relative to the connecting arm and positioned, thereby adjusting the height of the handrail shell to adapt to users of different heights. Since the lower supporting arm has a horizontally extending part, when the lower supporting arm is rotated, it can drive the handrail shell to move closer to or away from the user, thereby adjusting the distance of the handrail shell. The handrail shell itself can rotate and be positioned along the axis in the up-down direction through the internal sliding piece, and the handrail shell can slide relative to the sliding piece in the front-back direction, so that the handrail shell can rotate and be adjusted in extension relative to the lower supporting arm, better adapting to different sitting positions of the user. When the user uses the handrail, the height and distance of the handrail shell can be adjusted according to the body type, and the front-back position of the handrail shell can also be adjusted according to different sitting positions, which has strong flexibility and better adapts to different use needs, improving the use experience.

[0007] As a further improvement of the above technical solution, the connecting sleeve movably connects with a positioning block, and a plurality of positioning holes are arranged on the connecting arm in the up-down direction, and the positioning block can enter or exit any of the positioning holes. When the connecting sleeve needs to be adjusted, the positioning block is exited from the positioning hole, and after the cooperation between the positioning block and the positioning hole is removed, the connecting sleeve can move up and down relative to the connecting arm, so as to adjust the height of the handrail shell, and after the adjustment is completed, the positioning block is matched into the corresponding positioning hole, so as to limit the relative movement of the connecting arm and the connecting sleeve, and the function of adjusting and positioning the height of the handrail shell is realized.

[0008] As a further improvement of the above technical solution, the connecting sleeve movably connects with a positioning block, and a plurality of positioning holes are arranged on the connecting arm in the up-down direction, and the positioning block can enter or exit any of the positioning holes. When the connecting sleeve needs to be adjusted, the positioning block is exited from the positioning hole, and after the cooperation between the positioning block and the positioning hole is removed, the connecting sleeve can move up and down relative to the connecting arm, so as to adjust the height of the handrail shell, and after the adjustment is completed, the positioning block is matched into the corresponding positioning hole, so as to limit the relative movement of the connecting arm and the connecting sleeve, and the function of adjusting and positioning the height of the handrail shell is realized.

[0009] As a further improvement of the above technical solution, the bottom surface of the lower supporting arm is provided with a first clamping groove, a plurality of first clamping grooves are arranged around the rotation axis of the lower supporting arm, the top surface of the connecting sleeve is connected with a first universal wheel, and the rolling end of the first universal wheel can be matched and connected into any of the first clamping grooves. When the lower supporting arm needs to be adjusted, the lower supporting arm is directly rotated, and at this time, the rolling end of the first universal wheel needs to overcome the resultant force generated by the cooperation between the first clamping grooves, so that the rolling end of the first universal wheel is out of the first clamping groove and is rotated into the corresponding first clamping groove at the adjusted position of the lower supporting arm, and the position of the lower supporting arm is positioned by the cooperation between the rolling end of the first universal wheel and the first clamping groove, so that the position state of the lower supporting arm can be conveniently changed.

[0010] As a further improvement of the above technical solution, the top end of the lower supporting arm is formed with a connecting column, the bottom side of the handrail shell is provided with an avoiding groove extending in the front-rear direction, the connecting column extends upward into the avoiding groove and passes through the sliding piece, the top end of the connecting column is connected with a rotating block, the bottom side of the rotating block is provided with a second universal wheel, the top side of the sliding piece is provided with a second clamping groove, the second clamping groove is arranged in a plurality of circumferential arrays around the connecting column, and the rotating end of the second universal wheel can be matched and connected in any one of the second clamping grooves. The handrail shell can be adjusted in sliding and rotating. Specifically, when the handrail shell needs to be adjusted in sliding, the handrail shell can be directly moved forward and backward relative to the lower supporting arm, at this time, the sliding piece slides forward and backward in the handrail shell, and the avoiding groove on the bottom side of the handrail shell can avoid the connecting column; when the handrail shell needs to be adjusted in rotating, the handrail shell is directly rotated, at this time, the rolling end of the second universal wheel needs to overcome the resultant force generated by the mutual cooperation of the second clamping grooves, so that the rolling end of the second universal wheel exceeds the second clamping groove, and is rotated into the second clamping groove corresponding to the adjusted position of the handrail shell, the position of the handrail shell is positioned by the mutual cooperation of the rolling end of the second universal wheel and the second clamping groove, the rotating adjustment of the handrail shell is realized, and the position state of the handrail shell can be conveniently changed to adapt to the use requirements of different body postures of the user.

[0011] As a further improvement of the above technical solution, the second universal wheel is symmetrically arranged at two positions around the connecting column. The two second universal wheels are matched with the corresponding two clamping grooves at the two positions of the connecting column, so as to limit the rotation of the handrail shell relative to the lower supporting arm, and the stability of the rotation limiting of the handrail shell can be improved.

[0012] As a further improvement of the above technical solution, a plurality of third clamping grooves are arranged on the inner side of the handrail shell in the front-rear direction, an elastic piece and a limiting block are arranged in the sliding piece, the side surface of the limiting block facing the third clamping groove is an arc surface, and the elastic piece has a tendency to press the arc surface of the limiting block into any one of the third clamping grooves. The arc surface of the limiting block is pressed into the third clamping groove by the elastic piece, the position of the handrail shell and the sliding piece can be limited, when the position of the handrail shell needs to be adjusted in sliding forward and backward, the handrail shell is forced, so that the handrail shell moves forward and backward relative to the lower supporting arm, at this time, the inner side wall of the third clamping groove extrudes the limiting block to the elastic piece, so that the elastic piece is elastically deformed, and the limiting block can pass through the third clamping groove, so that the handrail shell is adjusted to the corresponding position, the limiting block is pressed into the third clamping groove by the elastic force of the elastic piece, and the relative positioning of the handrail shell after the sliding adjustment is realized by the mutual cooperation of the limiting block and the third clamping groove, so as to improve the position stability of the handrail shell during use.

[0013] As a further improvement of the above technical solution, the elastic member is a spring, two ends of the elastic member are respectively provided with the limiting blocks, the left and right sides of the armrest shell are respectively provided with a plurality of the third clamping grooves, and the elastic member can press the arc surfaces of the two limiting blocks into the corresponding third clamping grooves respectively. The third clamping grooves are arranged at positions on the left and right sides of the sliding member in the armrest shell, and the two ends of the spring act on the two limiting blocks respectively, so that the arc surfaces of the two limiting blocks are pressed into the two third clamping grooves respectively, thereby forming a sliding connection and positioning on the left and right sides of the sliding member and the left and right sides of the armrest shell respectively, and the stability of the relative positioning of the sliding member in the armrest shell is further improved.

[0014] As a further improvement of the above technical solution, the connecting arm bottom is inclined and bent in a direction away from the connecting sleeve to form a connecting section. The inclined and bent connecting section of the connecting arm bottom can facilitate the installation and fixation of the entire armrest on the rear position of the seat, thereby avoiding the position of the user.

[0015] A seat comprising the above armrest.

[0016] The technical solution has at least the following beneficial effects: when the seat is used, the height and distance of the armrest shell can be adjusted according to the body size of the user, and the front and rear positions of the armrest can be adjusted according to different sitting postures, so that the flexibility is high, different use requirements can be better adapted, and the use experience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly described below. Obviously, the described drawings are only a part of the embodiments of the present application, not all embodiments, and those skilled in the art can obtain other design schemes and drawings according to these drawings without creative labor.

[0018] Figure 1 is a perspective view of the armrest of the present application.

[0019] Figure 2 is a schematic view of the separation structure of the armrest shell and the lower supporting arm of the present application.

[0020] Figure 3 is a schematic view of the separation structure of the lower supporting arm and the connecting arm of the present application.

[0021] Figure 4 is a schematic view of the separation structure of the connecting arm and the connecting sleeve of the present application.

[0022] In the drawings: 100- connecting arm, 110- positioning hole, 120- connecting section, 200- connecting sleeve, 210- positioning block, 220- transmission rod, 230- shifting block, 240- hole opening, 250- first universal wheel, 300- lower supporting arm, 310- first clamping groove, 320- connecting column, 330- rotating block, 341- second universal wheel, 400- handrail shell, 410- sliding piece, 411- second clamping groove, 412- elastic piece, 413- limiting block, 420- third clamping groove, 430- avoiding groove. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only for explaining the present application, and cannot be understood as a limitation of the present application.

[0024] In the description of the present application, it should be understood that, in relation to the orientation description, for example, the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0026] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0027] Reference Figure 1The application relates to a handrail which comprises a connecting arm 100, a connecting sleeve 200, a lower supporting arm 300 and a handrail shell 400, wherein the connecting sleeve 200 is sleeved outside the connecting arm 100 and can move and be positioned along the up-down direction on the connecting arm 100; the bottom end of the lower supporting arm 300 is rotationally connected to the top end of the connecting sleeve 200, the lower supporting arm 300 can rotate and be positioned along the up-down direction axis, and the middle part of the lower supporting arm 300 extends along the front-back direction; the inside of the handrail shell 400 is slidingly connected with a sliding piece 410, the top end of the lower supporting arm 300 penetrates through the bottom side of the handrail shell 400 and is rotationally connected to the sliding piece 410, and the sliding piece 410 can rotate and be positioned along the up-down direction axis.

[0028] As known from the above, the connecting arm 100 is used for being connected to the seat of an external device, so that the whole handrail is relatively connected and fixed to the seat, and the handrail shell 400 is used for supporting the hands of a user; during use, the connecting sleeve 200 can be moved and positioned along the up-down direction relative to the connecting arm 100, so as to adjust the height of the handrail shell 400 to adapt to users of different heights; since the lower supporting arm 300 has a horizontally extending part, when the lower supporting arm 300 is rotated, the handrail shell 400 can be driven to be close to or far away from the user, so as to adjust the distance of the handrail shell 400, the handrail shell 400 itself can rotate and be positioned along the up-down direction axis through the internal sliding piece 410, and the handrail shell 400 can slide relative to the sliding piece 410 along the front-back direction, so that the handrail shell 400 can be rotated and telescopic adjusted relative to the lower supporting arm 300, and better adapt to different sitting postures of the user; in this way, when the user uses the handrail, the height and the distance of the handrail shell 400 can be adjusted according to the body shape of the user, and the front-back position of the handrail shell 400 can be adjusted according to different sitting postures, so that the flexibility is high, different use requirements can be better adapted, and the use experience is improved.

[0029] There are various ways for the connecting sleeve 200 to be moved and adjusted along the up-down direction on the connecting arm 100 and then be positioned, for example, a screw is arranged outside the connecting sleeve 200, the end of the screw is pressed against the connecting arm 100, so that the relative position of the connecting sleeve 200 and the connecting arm 100 is fixed, and in the embodiment, as shown in the figure, the connecting sleeve 200 is provided with a plurality of screw holes, and the connecting arm 100 is provided with a plurality of screws, the screws are inserted into the screw holes, and the ends of the screws are pressed against the connecting arm 100, so that the relative position of the connecting sleeve 200 and the connecting arm 100 is fixed. Figure 4As shown, the connecting sleeve 200 movably connects with a positioning block 210, and a plurality of positioning holes 110 are arranged on the connecting arm 100 in the up-down direction, and the positioning block 210 can enter or exit any one of the positioning holes 110. When the connecting sleeve 200 needs to be adjusted, the positioning block 210 is exited from the positioning hole 110, and after the cooperation between the positioning block 210 and the positioning hole 110 is removed, the connecting sleeve 200 can move up and down relative to the connecting arm 100, so as to adjust the height of the handrail shell 400, and after the adjustment is completed, the positioning block 210 is matched into the corresponding positioning hole 110, so as to limit the relative movement of the connecting arm 100 and the connecting sleeve 200, and the function of adjusting and positioning the height of the handrail shell 400 is realized.

[0030] There are various ways to control the positioning block 210 to enter or exit the positioning hole 110, for example, the positioning block 210 directly passes through the connecting sleeve 200, and then the whole is slid on the connecting sleeve 200 to enter or exit the positioning hole 110, and in the embodiment, the inside of the connecting sleeve 200 is rotationally connected with a transmission rod 220 along the horizontal axis, the top end of the transmission rod 220 is formed with a knob 230, the outside of the connecting sleeve 200 is provided with a hole 240 opposite the position of the knob 230, the knob 230 protrudes out of the connecting sleeve 200 from the hole 240, and the positioning block 210 is formed at the bottom end of the transmission rod 220. When the positioning block 210 needs to be adjusted to enter or exit the positioning hole 110, the knob 230 protruding from the hole 240 is forced, the transmission rod 220 is rotated by the knob 230, so that the positioning block 210 at the bottom end of the transmission rod 220 exits the positioning hole 110, at this time, the movement of the connecting sleeve 200 relative to the connecting arm 100 can be removed, and when the height adjustment of the handrail shell 400 is completed, the transmission rod 220 is rotated again by the knob 230, so that the positioning block 210 at the bottom end of the transmission rod 220 enters the corresponding positioning hole 110, thereby positioning the connecting arm 100 and the connecting sleeve 200 relative to each other, so that the convenience of adjusting the height of the connecting sleeve 200 is improved.

[0031] In actual application, in order to keep the positioning block 210 in the positioning hole 110 to limit the relative movement of the connecting arm 100 and the connecting sleeve 200, an elastic structure can be arranged between the transmission rod 220 and the inside of the connecting sleeve 200, the elastic structure applies elastic force to the bottom of the transmission rod 220, so that the positioning block 210 remains in the positioning hole 110, and the elastic structure can be a spring, a torsional spring, etc. Alternatively, the entire center of gravity of the transmission rod 220 is designed, for example, the gravity of the knob 230 is increased, so that the knob 230 protrudes from the hole 240 in the natural state, and the positioning block 210 enters the positioning hole 110.

[0032] There are various ways to rotate and position the lower supporting arm 300 on the connecting sleeve 200, for example, a connecting hole is arranged on the bottom end of the lower supporting arm 300, and a connecting shaft is arranged on the top end of the connecting sleeve 200, the connecting shaft is inserted into the connecting hole to achieve the rotation connection of the lower supporting arm 300, and the connecting shaft and the connecting hole are in interference fit, so as to position the lower supporting arm 300 and the connecting sleeve 200 after rotation. In order to further improve the reliability of the rotation connection and positioning of the lower supporting arm 300 and the connecting sleeve 200, as shown in Figure 3 In the embodiment, a first clamping groove 310 is arranged on the bottom surface of the lower supporting arm 300, a plurality of first clamping grooves 310 are arranged around the rotation axis of the lower supporting arm 300, a first universal wheel 250 is connected to the top surface of the connecting sleeve 200, and the rolling end of the first universal wheel 250 can be matched and connected into any one of the first clamping grooves 310. When the lower supporting arm 300 needs to be adjusted, the lower supporting arm 300 is directly rotated, at this time, the rolling end of the first universal wheel 250 needs to overcome the resultant force generated by the mutual cooperation of the first clamping grooves 310, so that the rolling end of the first universal wheel 250 is out of the first clamping groove 310, and is rotated to the first clamping groove 310 corresponding to the adjusted position of the lower supporting arm 300. The position of the lower supporting arm 300 is positioned by the mutual cooperation of the rolling end of the first universal wheel 250 and the first clamping groove 310, so that the position state of the lower supporting arm 300 can be conveniently changed.

[0033] The first universal wheel 250 includes a ball seat and a ball, the ball is installed in the ball seat, the ball has a part protruding from the ball seat, and the part of the ball protruding from the ball seat forms a rolling end. The ball has a certain activity space in the ball seat, and an elastic structure is installed in the ball seat, which can be a spring, a rubber column, etc. The elastic structure presses against the ball, so that the ball partially protrudes from the ball seat. When an external force acts on the ball, the ball can be pressed into the ball seat, and the elastic structure is compressed, so that the amount of the ball protruding from the ball seat is reduced. When the lower supporting arm 300 needs to be rotated by an external force, the rolling end of the first universal wheel 250 can conveniently exceed the first clamping groove 310, and the smoothness of the rotation adjustment of the lower supporting arm 300 is improved.

[0034] As Figure 2As shown, as the specific embodiment of the rotating positioning of the handrail shell 400 on the lower supporting arm 300, the top end of the lower supporting arm 300 is formed with a connecting column 320, the bottom side of the handrail shell 400 is provided with an avoiding groove 430 extending along the front-rear direction, the connecting column 320 extends into the avoiding groove 430 upwardly and passes through the sliding piece 410, the top end of the connecting column 320 is connected with a rotating block 330, the bottom side of the rotating block 330 is provided with a second universal wheel 341, the top side of the sliding piece 410 is provided with a second clamping groove 411, the second clamping groove 411 is circumferentially arranged with a plurality of second clamping grooves 411, the rotating end of the second universal wheel 341 can be connected to any one of the second clamping grooves 411, and similarly, the structure of the second universal wheel 341 is similar to that of the first universal wheel 250, so that the rolling end of the second universal wheel 341 can conveniently pass through the second clamping groove 411. The handrail shell 400 can be adjusted in sliding and rotating, specifically, when the handrail shell 400 needs to be adjusted in sliding, the handrail shell 400 can be directly moved forward and backward relative to the lower supporting arm 300, at this time, the sliding piece 410 slides in the handrail shell 400 relative to the front and back, and the avoiding groove 430 on the bottom side of the handrail shell 400 can avoid the connecting column 320; when the handrail shell 400 needs to be adjusted in rotating, the handrail shell 400 is directly rotated, at this time, the resultant force generated by the mutual cooperation of the rolling end of the second universal wheel 341 and the second clamping groove 411 needs to be overcome, so that the rolling end of the second universal wheel 341 exceeds the second clamping groove 411, and is rotated into the second clamping groove 411 corresponding to the adjusted position of the handrail shell 400, the position of the handrail shell 400 is positioned by the mutual cooperation of the rolling end of the second universal wheel 341 and the second clamping groove 411, the rotating adjustment of the handrail shell 400 is realized, and thus the position state of the handrail shell 400 can be conveniently changed to adapt to the use requirements of different body postures of the user.

[0035] The number of the second universal wheels 341 can be one or more, and in the embodiment, the second universal wheels 341 are symmetrically arranged with two along the connecting column 320. The two second universal wheels 341 are respectively matched with the corresponding two clamping grooves at the positions on both sides of the connecting column 320, so as to limit the rotation of the handrail shell 400 relative to the lower supporting arm 300, and thus the stability of the rotation limiting of the handrail shell 400 can be improved.

[0036] After the armrest shell 400 is adjusted in position relative to the sliding member 410, in order to maintain the position of the armrest shell 400, in the embodiment, a plurality of third clamping grooves 420 are arranged on the inner side of the armrest shell 400 along the front and back direction, the sliding member 410 is provided with an elastic member 412 and a limiting block 413, the side of the limiting block 413 facing the third clamping groove 420 is an arc surface, of course, the shape of the arc surface is arc-shaped, which facilitates the arc surface to enter or exit the third clamping groove 420, the elastic member 412 has a tendency to press the arc surface of the limiting block 413 into any one of the third clamping grooves 420, in actual application, in order to improve the stability of the position of the elastic member 412 and the limiting block 413, a groove for accommodating the elastic member 412 and the limiting block 413 can be arranged in the sliding member 410, thereby better limiting the active position of the elastic member 412 and the limiting block 413. The elastic member 412 presses the arc surface of the limiting block 413 into the third clamping groove 420, which can limit the position of the armrest shell 400 and the sliding member 410, when it is necessary to adjust the position of the armrest shell 400 to slide forward and backward, force is applied to the armrest shell 400, so that the armrest shell 400 moves forward and backward relative to the lower support arm 300, at this time, the inner side wall of the third clamping groove 420 will press the limiting block 413 to the elastic member 412, so that the elastic member 412 elastically deforms, and the limiting block 413 can pass through the third clamping groove 420, after the armrest shell 400 is adjusted to the corresponding position, the elastic force of the elastic member 412 is used to press the limiting block 413 into the third clamping groove 420, through the cooperation of the limiting block 413 and the third clamping groove 420, the relative positioning of the armrest shell 400 after sliding adjustment is realized, and the stability of the position of the armrest shell 400 during use is improved.

[0037] In the above embodiment, the number of limiting blocks 413 can be only one, at this time, the elastic member 412 provides unilateral elastic force positioning for the limiting block 413, in addition, the elastic member 412 is mainly used to provide a force for the limiting block 413 to resist and position in the third clamping groove 420, which can adopt structures such as rubber columns and torsional springs, and in the embodiment, the elastic member 412 is a spring, the two ends of the elastic member 412 are respectively provided with the limiting blocks 413, the left and right sides of the armrest shell 400 are respectively provided with a plurality of third clamping grooves 420, and the elastic member 412 can press the arc surfaces of the two limiting blocks 413 into the corresponding third clamping grooves 420. The third clamping grooves 420 are arranged in the armrest shell 400 at positions on the left and right sides of the sliding member 410, and the two ends of the spring act on the two limiting blocks 413, respectively, so that the arc surfaces of the two limiting blocks 413 are pressed into the two third clamping grooves 420, respectively, thereby forming sliding connection positioning on the left and right sides of the armrest shell 400 on the two sides of the sliding member 410, respectively, which can further improve the stability of the relative positioning of the sliding member 410 in the armrest shell 400.

[0038] In some embodiments, the bottom of the connecting arm 100 is bent in a direction away from the connecting sleeve 200 to form a connecting section 120. The bent connecting section 120 of the bottom of the connecting arm 100 can facilitate the installation of the entire armrest on the rear of the seat, thereby avoiding the position of the user.

[0039] A seat comprising the armrest described above, of course, the seat also comprises a seat cushion, a seat frame, the seat cushion is connected to the seat frame, and part of the seat also comprises a backrest, the backrest is connected to the rear side of the seat frame, at this time the connecting arm 100 of the armrest can be connected to the seat cushion or the seat frame.

[0040] When using the seat, the height and distance away of the armrest shell 400 can be adjusted according to the body size of the user, and the front and rear positions of the armrest can also be adjusted according to different sitting postures, which is highly flexible and better adapts to different use requirements, thereby improving the use experience.

[0041] The preferred embodiments of the present application are described in detail above, but the present application is not limited to the embodiments described above. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application. These equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A handrail, characterized in that: include: Connecting arm (100); A connecting sleeve (200) is sleeved on the outside of the connecting arm (100). The connecting sleeve (200) can move and be positioned on the connecting arm (100) in the vertical direction. The lower support arm (300) is rotatably connected at its bottom end to the top end of the connecting sleeve (200). The lower support arm (300) can rotate and be positioned along the vertical axis. The middle part of the lower support arm (300) extends along the front-back direction. The armrest shell (400) has a sliding member (410) slidably connected inside in the front-to-back direction. The top end of the lower support arm (300) passes through the bottom side of the armrest shell (400) and is rotatably connected to the sliding member (410). The sliding member (410) can rotate and be positioned along an axis extending in the up-down direction.

2. The handrail according to claim 1, characterized in that: The connecting sleeve (200) is movably connected to a positioning block (210), and the connecting arm (100) is provided with a plurality of positioning holes (110) spaced apart along the vertical direction. The positioning block (210) can enter or exit any of the positioning holes (110).

3. A handrail according to claim 2, characterized in that: A transmission rod (220) is rotatably connected to the inner side of the connecting sleeve (200) along the horizontal axis. A lever (230) is formed at the top of the transmission rod (220). An opening (240) is provided on the outer side of the connecting sleeve (200) directly opposite the lever (230). The lever (230) protrudes from the opening (240) outside the connecting sleeve (200). A positioning block (210) is formed at the bottom end of the transmission rod (220).

4. A handrail according to claim 1, characterized in that: The bottom surface of the lower support arm (300) is provided with a first slot (310), and multiple first slots (310) are provided around the rotation axis of the lower support arm (300). The top surface of the connecting sleeve (200) is connected to a first universal wheel (250), and the rolling end of the first universal wheel (250) can be connected to any one of the first slots (310).

5. A handrail according to claim 1, characterized in that: The lower support arm (300) has a connecting post (320) at its top end. The bottom side of the armrest shell (400) is provided with a clearance groove (430) extending in the front-rear direction. The connecting post (320) extends upward into the clearance groove (430) and passes through the sliding member (410). The top end of the connecting post (320) is connected to a rotating block (330). The bottom side of the rotating block (330) is provided with a second universal wheel (341). The top side of the sliding member (410) is provided with a second slot (411). Multiple second slots (411) are arranged in a circumferential array around the connecting post (320). The rotating end of the second universal wheel (341) can be connected to any one of the second slots (411).

6. A handrail according to claim 5, characterized in that: The second universal wheel (341) is provided in two symmetrical configurations along the connecting column (320).

7. A handrail according to claim 1, characterized in that: The armrest shell (400) has a plurality of third slots (420) arranged on the inner side along the front-back direction. The sliding member (410) is provided with an elastic member (412) and a limiting block (413). The side of the limiting block (413) facing the third slot (420) is an arc-shaped surface. The elastic member (412) has a tendency to press the arc-shaped surface of the limiting block (413) into any of the third slots (420).

8. A handrail according to claim 7, characterized in that: The elastic element (412) is a spring, and the two ends of the elastic element (412) are respectively provided with the limiting block (413). The left and right sides of the armrest shell (400) are respectively provided with a plurality of the third slots (420). The elastic element (412) can press the arc-shaped surfaces of the two limiting blocks (413) into the corresponding third slots (420).

9. A handrail according to claim 1, characterized in that: The bottom of the connecting arm (100) is bent at an angle away from the connecting sleeve (200) to form a connecting section (120).

10. A type of seat, characterized in that: Including the handrail as described in any one of claims 1 to 9.

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