Adjustable armrest device and seat

Abstract

The application discloses an adjustable handrail device and a seat, the adjustable handrail device comprising a supporting assembly, a rotating seat, a first connecting assembly and a second connecting assembly, the first connecting assembly comprising a first pipe body, the second connecting assembly comprising a second pipe body which is mutually inserted with the first pipe body, the first and second connecting assemblies being connected through a telescopic adjusting structure to enable telescopic movement between the first and second pipe bodies, the supporting assembly being arranged on the rotating seat and being able to translate and rotate relative to the rotating seat through a plane adjusting structure, the rotating seat being rotatably arranged on the first connecting assembly and being able to rotate relative to the first connecting assembly through a pitch adjusting structure to adjust the pitch angle of the supporting assembly, the first connecting assembly being provided with a locking structure and a knob which is linked with the locking structure, the locking structure being able to lock or unlock each adjusting structure, and the knob being able to rotate and switch the locking or unlocking state of each adjusting structure by the locking structure. The application can have the reliability of locking the adjusted position, the simplicity of the appearance structure and the convenience of operation.

Description

Technical Field

[0001] This invention relates to the field of seating technology, and in particular to an adjustable armrest device and a seat. Background Technology

[0002] To accommodate diverse user needs, most office chairs and ergonomic chairs are equipped with adjustable armrests. Some armrests support multi-dimensional adjustments, such as height adjustment of the armrest tube, tilt adjustment of the armrest support, horizontal displacement adjustment, and horizontal rotation adjustment. For fixing the adjusted position, current technology typically uses the elastic force of a spring to engage or lock two adjusting components, restricting their relative movement and thus locking the position. During adjustment, the user must apply external force to overcome this elastic force to create relative displacement between the components. While this method simplifies the appearance of the armrest, it suffers from insufficient reliability. If the spring force is weak, accidental application of force during use can easily affect the previously adjusted position; if the spring force is strong, the user needs to apply significant force to adjust, making adjustment inconvenient. Therefore, some armrests incorporate independent mechanical locking mechanisms (such as push-button or toggle switches) for certain adjustments. For example, for height adjustment of the armrest tube, the user operates a switch to move the locking mechanism to unlock or lock. While this method provides reliable locking, for multi-dimensional adjustments, a separate operating switch is required for each dimension. This complicates the appearance of the handrail device and makes it inconvenient for users to identify and operate multiple switches during adjustment. In summary, existing handrail devices supporting multi-dimensional adjustment struggle to balance simplification of appearance, reliability of locking, and ease of operation, and their overall structural design still needs improvement. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an adjustable handrail device, which can switch the locking and unlocking of different dimensions of adjustment by rotating a knob. This improves the reliability of the handrail's position locking after adjustment, and also simplifies the appearance structure and facilitates user operation.

[0004] The present invention also proposes a seat having the adjustable armrest device.

[0005] According to a first aspect of the present invention, an adjustable handrail device includes a support assembly, a rotating base, a first connecting assembly, and a second connecting assembly. The first connecting assembly includes a first tube, and the second connecting assembly includes a second tube that is inserted into the first tube. A telescopic adjustment structure is provided between the first connecting assembly and the second connecting assembly, and the two are connected through the telescopic adjustment structure, allowing relative telescopic movement between the first tube and the second tube. The support assembly is disposed on the rotating base and a planar adjustment structure is provided between them. The support assembly is capable of translating and rotating relative to the rotating base through the planar adjustment structure. The rotating base is rotatable. A pitch adjustment structure is provided on the upper side of the first connecting component and between them. The rotating seat can rotate relative to the first connecting component through the pitch adjustment structure to adjust the pitch angle of the supporting component. The first connecting component is provided with a locking structure and a knob linked to the locking structure. The locking structure can lock or unlock the telescopic adjustment structure, the plane adjustment structure, and the pitch adjustment structure. The knob can rotate and switch the locking or unlocking state of the locking structure for the telescopic adjustment structure, the plane adjustment structure, and the pitch adjustment structure.

[0006] The adjustable handrail device according to embodiments of the present invention has at least the following beneficial effects: When adjustment is required, the telescopic adjustment structure, planar adjustment structure, or pitch adjustment structure can be unlocked by rotating a knob. If the telescopic adjustment structure is unlocked, the relative telescopic movement between the first tube and the second tube can be operated to adjust the height of the first connecting component relative to the second connecting component, thereby adjusting the height of the supporting component. If the planar adjustment structure is unlocked, the supporting component can be moved and rotated relative to the rotating seat to adjust the planar position of the supporting component relative to the rotating seat. If the pitch adjustment structure is unlocked, the rotating seat can be rotated relative to the first connecting component to adjust the pitch angle of the supporting component, achieving multi-dimensional adjustment to meet user needs. The present invention can switch the locking and unlocking of different dimensional adjustments by rotating a knob, which improves the reliability of the position locking after handrail adjustment and simplifies the appearance structure, making it convenient for users to operate.

[0007] According to some embodiments of the present invention, the telescopic adjustment structure includes an adjustment shaft and an adjustment sleeve. The adjustment sleeve is fixedly disposed at the upper end of the second tube body, and the second tube body is movably inserted into the first tube body. The first connecting assembly further includes a connecting seat. The upper end of the adjustment shaft is fixedly connected to the connecting seat. The connecting seat is disposed on the upper side of the first tube body and is pivotally connected to the first tube body via the adjustment shaft. The adjustment shaft passes through the adjustment sleeve and extends into the second tube body. The adjustment shaft is provided with a plurality of stop protrusions spaced apart along the axial direction. The inner side of the adjustment sleeve is provided with a stop groove that can cooperate with the stop protrusions. The connecting seat can rotate relative to the first tube body and drive the adjustment shaft to rotate relative to the adjustment sleeve, so that the stop protrusions rotate into the stop grooves or rotate out of the stop grooves. When the stop protrusions cooperate with the stop grooves, they can restrict the telescopic movement between the first tube body and the second tube body. When the stop protrusions are separated from the stop grooves, the first tube body and the second tube body can telescopically move.

[0008] According to some embodiments of the present invention, the lower end of the adjusting shaft is connected to a limiting block that contacts the inner wall of the second tube. The limiting block can abut against the lower side of the adjusting sleeve to limit the telescopic movement between the first tube and the second tube.

[0009] According to some embodiments of the present invention, the locking structure includes a first locking member and an unlocking turntable. The unlocking turntable is rotatably disposed on the connecting seat and linked with the knob, and can rotate with the knob. The first locking member is movably disposed on the connecting seat, and the direction of movement of the first locking member is perpendicular to the axial direction of the unlocking turntable. The first locking member has a first unlocking protrusion on the side facing the unlocking turntable. The circumference of the unlocking turntable is provided with a first unlocking recess corresponding to the first unlocking protrusion. The first locking member has a first locking protrusion on the side away from the unlocking turntable. The first tube body is provided with a locking hole corresponding to the first locking protrusion. The first locking protrusion passes through the connecting seat. The connecting seat is inserted into the locking hole. The first locking member has a first elastic element. The first elastic element causes the first locking member to tend to move towards the unlocking turntable and causes the first unlocking protrusion to abut against the circumference of the unlocking turntable. When the first unlocking protrusion abuts against the circumference of the unlocking turntable, the first locking protrusion is inserted into the locking hole to restrict the relative rotation between the connecting seat and the first tube body. The unlocking turntable can rotate so that the first unlocking recess corresponds to the first unlocking protrusion, so that the first unlocking protrusion can be inserted into the first unlocking recess and the first locking protrusion can be disengaged from the locking hole under the action of the first elastic element.

[0010] According to some embodiments of the present invention, the planar adjustment structure includes a first adjusting wheel and an adjusting bar. The upper side of the rotating seat is provided with a rotating shaft portion. The supporting assembly includes a lower housing seat. The lower housing seat is provided with a strip-shaped groove. The rotating shaft portion passes through the strip-shaped groove and passes through the lower housing seat. The first adjusting wheel is fixedly disposed on the upper side of the rotating shaft portion. The adjusting bar is movably disposed on the lower housing seat, and the moving direction of the adjusting bar is perpendicular to the extending direction of the strip-shaped groove. A plurality of first engaging recesses are provided at intervals on the periphery of the first adjusting wheel. A first engaging tooth portion is correspondingly provided on the adjusting bar, which can engage with the first engaging recess. A plurality of first engaging teeth portions are provided and arranged along the extending direction of the strip-shaped groove on the side of the adjusting bar facing the first adjusting wheel. The adjusting bar is acted upon by a second elastic member. The second elastic member enables the adjusting bar to abut against the first adjusting wheel and engage the first engaging teeth portion into the first engaging recess. The adjusting bar can overcome the force of the second elastic member and move away from the first adjusting wheel, causing the first engaging teeth portion to disengage from the first engaging recess.

[0011] According to some embodiments of the present invention, the locking structure includes a second locking member, a third locking member, and an unlocking turntable. The unlocking turntable is rotatably disposed on the first connecting assembly and linked with the knob, and can rotate with the knob. The second locking member is movably disposed on the rotating base, and the moving direction of the second locking member is perpendicular to the axial direction of the unlocking turntable. The second locking member has a second unlocking protrusion on the side facing the unlocking turntable. The circumference of the unlocking turntable is provided with a first unlocking recess corresponding to the second unlocking protrusion. The second unlocking protrusion passes through the rotating base and can be inserted into the first unlocking recess. The third locking member is movably sleeved on the rotating shaft and located below the first adjusting wheel. The third locking member has a second locking protrusion on the side facing the adjusting bar, and the adjusting bar is provided with a lock corresponding to the second locking protrusion. The locking groove extends in the same direction as the strip groove. The third locking member rotates with the second locking member and can move with the second locking member. The second locking member or the third locking member is equipped with a third elastic member. The third elastic member can cause the second locking member and the third locking member to tend to move towards the unlocking turntable and cause the second unlocking protrusion to abut against the circumference of the unlocking turntable. When the second unlocking protrusion abuts against the circumference of the unlocking turntable, the second locking protrusion is inserted into the locking groove to restrict the first locking tooth from disengaging from the first engaging recess. The unlocking turntable can rotate to make the first unlocking recess correspond to the second unlocking protrusion, so that the second unlocking protrusion can be inserted into the first unlocking recess and the second locking protrusion can disengage from the locking groove under the action of the third elastic member.

[0012] According to some embodiments of the present invention, the third locking member is slidably engaged with the lower housing seat. When the supporting assembly translates relative to the rotating seat, the third locking member can move relative to the lower housing seat. When the supporting assembly rotates relative to the rotating seat, the third locking member can rotate with the lower housing seat.

[0013] According to some embodiments of the present invention, the pitch adjustment structure includes a second adjusting wheel and an adjusting member. The rotating base is provided with a rotating arm, and the first connecting assembly further includes a connecting seat. The rotating arm is rotatably connected to the connecting seat. The second adjusting wheel is fixedly disposed on the rotating arm and can rotate with the rotating arm. The adjusting member is movably disposed on the connecting seat, and the moving direction of the adjusting member is perpendicular to the axial direction of the second adjusting wheel. A plurality of second engaging recesses are provided at intervals on the circumference of the second adjusting wheel. The adjusting member is provided with a second engaging tooth portion on the side facing the second adjusting wheel, which can cooperate with the second engaging recess. The adjusting member is acted upon by a fourth elastic member. The fourth elastic member can cause the adjusting member to abut against the second adjusting wheel and cause the second engaging tooth portion to engage with the second engaging recess. The adjusting member can overcome the force of the fourth elastic member and move away from the second adjusting wheel, causing the second engaging tooth portion to disengage from the second engaging recess.

[0014] According to some embodiments of the present invention, the locking structure includes an unlocking turntable, which is rotatably disposed on the connecting seat and linked with the knob, and can rotate with the knob. The rotation axis of the unlocking turntable is collinear with the rotation axis of the rotating arm. The unlocking turntable has an arc-shaped locking wall. The adjusting member has a third locking protrusion on one side facing the unlocking turntable. The arc-shaped locking wall has a second unlocking recess corresponding to the third locking protrusion. The third locking protrusion is located on the inner arc of the arc-shaped locking wall. The arc-shaped locking wall can contact the third locking protrusion to restrict the second locking tooth from disengaging from the second locking recess. The unlocking turntable can rotate to make the second unlocking recess correspond to the third locking protrusion. When the adjusting member moves away from the second adjusting wheel, the third locking protrusion can enter the second unlocking recess.

[0015] The seat according to a second aspect of the present invention includes an adjustable armrest device according to the first aspect of the present invention described above.

[0016] The seat according to the embodiments of the present invention has at least the following beneficial effects: by adopting the above-mentioned adjustable armrest device, the locking and unlocking of different dimensions of the locking structure can be switched by rotating a knob, which can improve the reliability of the position locking after the armrest is adjusted, and also helps to simplify the appearance structure and facilitate user operation.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the adjustable handrail device according to a specific embodiment of the present invention; Figure 2 for Figure 1 Exploded view of the adjustable handrail device; Figure 3 for Figure 2 One of the exploded structural diagrams of the adjustable armrest device; Figure 4 for Figure 2 Partial exploded schematic diagram of the adjustable handrail device (Part 2); Figure 5 for Figure 1 One of the schematic diagrams of a partial structural cross-section of the adjustable handrail device; Figure 6 for Figure 1 Schematic diagram of a partial cross-section of the adjustable handrail device (Part 2); Figure 7 for Figure 1 Schematic diagram of a partial cross-section of the adjustable handrail device (Part 3); Figure 8 for Figure 1 Schematic diagram of a partial cross-section of the adjustable handrail device (Part 4); Figure 9 for Figure 1 Fifth schematic diagram of the partial structural cross-section of the adjustable handrail device; Figure 10 for Figure 1 A partial cross-sectional schematic diagram of the central rotary seat and the first connecting assembly; Figure 11 for Figure 10 Schematic diagram of the structure of the central adjustment shaft; Figure 12 for Figure 1 A partial structural cross-sectional diagram of the second connecting component.

[0019] Figure label: Support assembly 100, upper shell 110, lower shell 120, strip groove 121, adjusting strip 130, first locking tooth 131, locking groove 132, second elastic element 140; Rotary seat 200, rotating shaft 210, first adjusting wheel 220, first engaging recess 221, second adjusting wheel 230, second engaging recess 231, rotating arm 240; First connecting assembly 300, first tube body 310, locking hole 311, adjusting shaft 320, stop protrusion 321, connecting seat 330, side cover 331, limiting block 340, adjusting member 350, second locking tooth 351, third locking protrusion 352, fourth elastic member 360; Second connecting component 400, second tube body 410, adjusting sleeve 420, stop groove 421; Knob 510, central pivot 511, unlocking turntable 520, first unlocking recess 521, arc-shaped locking wall 522, second unlocking recess 523, first locking member 530, first unlocking protrusion 531, first locking protrusion 532, first elastic member 540, second locking member 550, second unlocking protrusion 551, annular flange 552, third locking member 560, second locking protrusion 561, hook 562, third elastic member 570. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that if directional descriptions are involved, such as up, down, front, back, left, right, etc., indicating the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings, it is only for the convenience of describing this invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0022] In the description of this invention, if words such as several, greater than, less than, exceeding, above, below, or within appear, then several means one or more, multiple means two or more, greater than, less than, exceeding, etc. are understood to exclude the number itself, and above, below, or within are understood to include the number itself.

[0023] If the terms "first" and "second" are used only to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0024] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0025] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 An adjustable handrail device includes a support assembly 100, a rotating base 200, a first connecting assembly 300, and a second connecting assembly 400. The first connecting assembly 300 includes a first tube 310, and the second connecting assembly 400 includes a second tube 410 that is inserted into the first tube 310. A telescopic adjustment structure is provided between the first connecting assembly 300 and the second connecting assembly 400, and they are connected through the telescopic adjustment structure, allowing relative telescopic movement between the first tube 310 and the second tube 410. The support assembly 100 is disposed on the rotating base 200 and a planar adjustment structure is provided between them, allowing the support assembly 100 to be connected relative to the rotating base 200 via the planar adjustment structure. The rotating seat 200 is rotatably mounted on the upper side of the first connecting component 300 and has a pitch adjustment structure between them. The rotating seat 200 can rotate relative to the first connecting component 300 through the pitch adjustment structure to adjust the pitch angle of the supporting component 100. The first connecting component 300 is provided with a locking structure and a knob 510 linked to the locking structure. The locking structure can lock or unlock the telescopic adjustment structure, the plane adjustment structure, and the pitch adjustment structure. The knob 510 can rotate and switch the locking or unlocking state of the locking structure for the telescopic adjustment structure, the plane adjustment structure, and the pitch adjustment structure.

[0026] Understandably, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown. When adjustment is required, the telescopic adjustment structure, planar adjustment structure, or pitch adjustment structure can be unlocked by rotating knob 510. If the telescopic adjustment structure is unlocked, the relative telescopic movement between the first tube 310 and the second tube 410 can be operated to adjust the height of the first connecting component 300 relative to the second connecting component 400, thereby adjusting the height of the support component 100. If the planar adjustment structure is unlocked, the support component 100 can be moved and rotated relative to the rotating seat 200 to adjust the planar position of the support component 100 relative to the rotating seat 200. If the pitch adjustment structure is unlocked, the rotating seat 200 can be rotated relative to the first connecting component 300 to adjust the pitch angle of the support component 100, achieving multi-dimensional adjustment to meet user needs. This invention can switch the locking and unlocking of different dimensions of adjustment by rotating a knob 510, which can improve the reliability of the position locking after the armrest is adjusted, and also helps to simplify the appearance structure and facilitate user operation.

[0027] In practical applications, the specific structural forms of the support component 100, rotating seat 200, first connecting component 300, second connecting component 400, telescopic adjustment structure, plane adjustment structure, pitch adjustment structure and locking structure can be set according to actual usage needs. They will not be described in detail here, but will be explained in detail below.

[0028] In some embodiments, the telescopic adjustment structure includes an adjustment shaft 320 and an adjustment sleeve 420. The adjustment sleeve 420 is fixedly disposed at the upper end of the second tube 410, and the second tube 410 is movably inserted into the first tube 310. The first connecting assembly 300 also includes a connecting seat 330. The upper end of the adjustment shaft 320 is fixedly connected to the connecting seat 330. The connecting seat 330 is disposed on the upper side of the first tube 310 and is pivotally connected to the first tube 310 via the adjustment shaft 320. The adjustment shaft 320 passes through the adjustment sleeve 420 and extends into the second tube 410. The adjustment shaft 320 is provided with multiple stops spaced apart along the axial direction. The inner side of the adjusting sleeve 420 is provided with a gear position protrusion 321 that can cooperate with the gear position protrusion 321. The connecting seat 330 can rotate relative to the first tube 310 and drive the adjusting shaft 320 to rotate relative to the adjusting sleeve 420, so that the gear position protrusion 321 rotates into the gear position groove 421 or rotates out of the gear position groove 421. When the gear position protrusion 321 cooperates with the gear position groove 421, it can restrict the telescopic movement between the first tube 310 and the second tube 410. When the gear position protrusion 321 is separated from the gear position groove 421, the first tube 310 and the second tube 410 can telescopically move.

[0029] Understandably, such as Figure 1 , Figure 2 , Figure 5 , Figure 8 , Figures 10 to 12As shown, both the first tube 310 and the second tube 410 extend in an inclined direction. The second tube 410 is movably inserted into the first tube 310. The adjusting sleeve 420 is fixedly disposed at the upper end of the second tube 410 and located inside the first tube 310. The axis of the adjusting shaft 320 is parallel to the extension direction of the first tube 310. The upper end of the adjusting shaft 320 is fixedly connected to the connecting seat 330 and rotates together with the connecting seat 330. The connecting seat 330 is disposed on the upper side of the first tube 310 and is pivotally connected to the first tube 310 through the adjusting shaft 320, so that the adjusting shaft 320 can be driven by the connecting seat 330 to rotate relative to the first tube 310. The adjusting shaft 320 passes through the adjusting sleeve 420 and extends into the second tube 410. The adjusting shaft 320 is provided with multiple stop protrusions 321 at intervals along the axial direction. The inner side of the adjusting sleeve 420 is provided with corresponding stop grooves 421. When adjustment is required, rotate the connecting seat 330, causing the adjusting shaft 320 to rotate as well, so that the gear position protrusion 321 rotates out of the gear position groove 421. At this time, the first tube 310 and the second tube 410 can move telescopically, and the connecting seat 330 and the first tube 310 can move up and down together to adjust the height of the support assembly 100. After the adjustment is completed, rotate the reset connecting seat 330, causing the adjusting shaft 321 to rotate and reset. The corresponding gear position protrusion 321 on it rotates into the gear position groove 421. At this time, the first tube 310 and the second tube 410 cannot move telescopically, thus temporarily fixing the adjusted height position.

[0030] In practical applications, multiple gear grooves 421 can be provided on the adjusting shaft 320, and gear protrusions 321 can be provided on the adjusting sleeve 420. Alternatively, a gear protrusion 321 can be provided on the adjusting shaft 320, and multiple gear grooves 421 distributed at intervals in the vertical direction can be provided on the adjusting sleeve 420. The specific settings can be made according to the actual needs of use.

[0031] In some embodiments, refer to Figure 8 , Figure 10 , Figure 11 and Figure 12 The device has two gear grooves 421, which are rotationally symmetrical about the axis of the adjusting sleeve 420. The adjusting shaft 320 has two sets of gear positions that are also rotationally symmetrical about the axis of the adjusting shaft 320. Each gear position includes multiple gear protrusions 321 spaced apart along the axial direction of the adjusting shaft 320. By providing two rotationally symmetrical gear grooves 421 and two sets of gear positions, the stability of the fit between the adjusting shaft 320 and the adjusting sleeve 420 is improved, making it easier to use.

[0032] Furthermore, a guide surface can be provided on the entry side of the gear shift protrusion 321 and / or the entrance side of the gear shift groove 421 to guide the gear shift protrusion 321 to engage with the gear shift groove 421 for ease of use.

[0033] In some embodiments, the lower end of the adjusting shaft 320 is connected to a limiting block 340 that contacts the inner wall of the second tube 410. The limiting block 340 can abut against the lower side of the adjusting sleeve 420 to limit the telescopic movement between the first tube 310 and the second tube 410.

[0034] Understandably, such as Figure 10 As shown, by setting a limiting block 340 at the lower end of the adjusting shaft 320, during use, the limiting block 340 abuts against the lower side of the adjusting sleeve 420, thereby limiting the telescopic movement between the first tube 310 and the second tube 410, preventing the first tube 310 and the second tube 410 from separating, and ensuring the reliability of use. At the same time, the limiting block 340 contacts the inner wall of the second tube 410, which can ensure the connection stability of the adjusting shaft 320 and prevent its sway. In actual applications, the specific structure of the limiting block 340 can be set according to the actual use requirements.

[0035] In some embodiments, the locking structure includes a first locking member 530 and an unlocking turntable 520. The unlocking turntable 520 is rotatably mounted on the connecting seat 330 and linked with the knob 510, and can rotate with the knob 510. The first locking member 530 is movably mounted on the connecting seat 330, and the direction of movement of the first locking member 530 is perpendicular to the axial direction of the unlocking turntable 520. The first locking member 530 has a first unlocking protrusion 531 on the side facing the unlocking turntable 520, and a first unlocking recess 521 is provided on the periphery of the unlocking turntable 520 corresponding to the first unlocking protrusion 531. The first locking member 530 has a first locking protrusion 532 on the side away from the unlocking turntable 520, and a locking hole 311 is provided on the first tube 310 corresponding to the first locking protrusion 532. The first locking protrusion 532 passes through... The connecting seat 330 is capable of being inserted into the locking hole 311. The first locking member 530 is equipped with a first elastic member 540. The first elastic member 540 can make the first locking member 530 tend to move towards the unlocking turntable 520 and make the first unlocking protrusion 531 abut against the periphery of the unlocking turntable 520. When the first unlocking protrusion 531 abuts against the periphery of the unlocking turntable 520, the first locking protrusion 532 is inserted into the locking hole 311 to restrict the relative rotation between the connecting seat 330 and the first tube body 310. The unlocking turntable 520 can rotate so that the first unlocking recess 521 corresponds to the first unlocking protrusion 531, so that under the action of the first elastic member 540, the first unlocking protrusion 531 is inserted into the first unlocking recess 521 and the first locking protrusion 532 is disengaged from the locking hole 311.

[0036] Understandably, such as Figure 2 , Figure 4 , Figure 5 , Figure 8 and Figure 10As shown, the unlocking turntable 520 is rotatably mounted on the connecting seat 330 and linked with the knob 510. Its rotation axis is parallel to the left and right direction. The first locking member 530 is movably mounted on the connecting seat 330. Its movement direction is parallel to the axis of the adjusting shaft 320 and perpendicular to the axis of the unlocking turntable 520. The first locking member 530 has a first unlocking protrusion 531 on the side facing the unlocking turntable 520 and a first locking protrusion 532 on the side away from the unlocking turntable 520. The first tube 310 is provided with a locking hole 311 corresponding to the first locking protrusion 532. The first elastic member 540 acts on the connecting seat 330 and the first locking member 530, giving them a tendency to move toward the unlocking turntable 520. The circumference of the unlocking turntable 520 is provided with a first unlocking recess 521 corresponding to the first unlocking protrusion 531. After the height adjustment of the support component 100 is completed, the knob 510 can be rotated, and the unlocking turntable 520 rotates accordingly, causing the first unlocking recess 521 to rotate away from the position corresponding to the first unlocking protrusion 531. At this time, the circumference of the unlocking turntable 520 presses against the first unlocking protrusion 531 and compresses the first elastic member 540. The first unlocking protrusion 531 disengages from the first unlocking recess 521 and abuts against the circumference of the unlocking turntable 520. After the first locking member 530 compresses the first elastic member 540 and moves downward, the first locking protrusion 532 inserts into the locking hole 311 to restrict the relative rotation between the connecting seat 330 and the first tube body 310, thereby realizing the telescopic adjustment of the structure. The locking mechanism prevents accidental rotation of the connecting seat 330 relative to the first tube 310, which could affect the height adjustment of the support component 100, thus achieving reliable position locking. When unlocking is required, the knob 510 is rotated so that the unlocking turntable 520 rotates to the first unlocking recess 521 corresponding to the first unlocking protrusion 531. At this time, under the action of the first elastic member 540, the first unlocking protrusion 531 is inserted into the first unlocking recess 521, and the first locking protrusion 532 disengages from the locking hole 311, thereby releasing the rotation restriction between the connecting seat 330 and the first tube 310, allowing the user to adjust the height of the support component 100.

[0037] In practical applications, in addition to the above-mentioned structure, the locking structure can also be changed according to the specific structure of the telescopic adjustment structure. For example, the second tube 410 is provided with a gear groove 421 spaced along the axial direction, and the first tube 310 is provided with a gear protrusion 321 that moves horizontally or swings. The first locking member 530 is linked to the gear protrusion 321 through a linkage structure. The up and down movement of the first locking member 530 controls the gear protrusion 321 to engage with or disengage from the gear groove 421, thereby controlling its locking or unlocking. Alternatively, the gear protrusion 321 is driven by an elastic member to engage with the gear groove 421. The first locking member 530 moves up and down to abut or disengage from the gear protrusion 321. When abutting, it restricts the gear protrusion from disengaging from the gear groove 421, thereby achieving its locking or unlocking. The specific changes can be made according to the actual needs of use.

[0038] In some embodiments, the planar adjustment structure includes a first adjusting wheel 220 and an adjusting bar 130. A rotating shaft portion 210 is provided on the upper side of the rotating seat 200. The supporting assembly 100 includes a lower housing 120, which has a strip groove 121. The rotating shaft portion 210 passes through the strip groove 121 into the lower housing 120. The first adjusting wheel 220 is fixedly disposed on the upper side of the rotating shaft portion 210. The adjusting bar 130 is movably disposed on the lower housing 120, and the moving direction of the adjusting bar 130 is perpendicular to the extending direction of the strip groove 121. A plurality of first engaging recesses 221 are spaced apart on the circumference of the first adjusting wheel 220. The adjusting bar 130... The adjustment bar 130 is provided with a first locking tooth 131 that can engage with the first locking recess 221. The first locking tooth 131 is provided in multiple ways and arranged along the extension direction of the strip groove 121 on the side of the adjustment bar 130 facing the first adjustment wheel 220. The adjustment bar 130 is acted upon by a second elastic member 140. The second elastic member 140 can cause the adjustment bar 130 to abut against the first adjustment wheel 220 and cause the first locking tooth 131 to engage with the first locking recess 221. The adjustment bar 130 can overcome the force of the second elastic member 140 and move away from the first adjustment wheel 220, so that the first locking tooth 131 disengages from the first locking recess 221.

[0039] Understandably, such as Figures 1 to 7 as well as Figure 10As shown, the support assembly 100 includes an upper shell 110 and a lower shell 120, which are fixedly connected. The upper shell 110 may be provided with a pad (not shown) for contact with the user's hand. The lower shell 120 is provided with a strip groove 121, and a first adjusting wheel 220 extends from the strip groove 121 in the front-rear direction. The upper side of the rotating seat 200 is provided with a rotating shaft 210, which passes through the strip groove 121 through the lower shell 120 and is fixedly connected to an adjusting bar 13 at its upper end. The first adjusting wheel 220 is movably disposed on the left and right sides of the lower housing 120, and its moving direction is perpendicular to the extension direction of the strip groove 121. Multiple first engaging recesses 221 are provided at intervals on the periphery of the first adjusting wheel 220. Multiple first engaging teeth 131 are provided on the side of the adjusting bar 130 facing the first adjusting wheel 220. The multiple first engaging teeth 131 are arranged along the extension direction of the strip groove 121, so that the first adjusting wheel 220 and the adjusting bar 130 form a gear-rack-like meshing structure. When it is necessary to adjust the planar position of the support assembly 100 relative to the rotating seat 200, the lower housing 120 is moved back and forth or rotated. The lower housing 120 drives the adjusting strip 130 to move or rotate together. The adjusting strip 130 will compress the second elastic element 140 and move away from the first adjusting wheel 220, so that the first locking tooth 131 disengages from the first engaging recess 221. After the adjustment is completed, the adjusting strip 130 will be reset under the action of the second elastic element 140, and it will abut against the first adjusting wheel 220 again and make the corresponding first locking tooth 131 engage with the corresponding first engaging recess 221, thereby temporarily fixing the adjusted planar position of the support assembly 100 relative to the rotating seat 200.

[0040] In practical applications, the first engagement recess 221 can also be set on the adjusting bar 130, and the first engagement tooth 131 can be set on the first adjusting wheel 220. The specific settings can be made according to the actual needs of use.

[0041] In some embodiments, the locking structure includes a second locking member 550, a third locking member 560, and an unlocking turntable 520. The unlocking turntable 520 is rotatably mounted on the first connecting assembly 300 and linked with the knob 510, and can rotate with the knob 510. The second locking member 550 is movably mounted on the rotating base 200, and the direction of movement of the second locking member 550 is perpendicular to the axial direction of the unlocking turntable 520. The side of the second locking member 550 facing the unlocking turntable 520 has a second unlocking mechanism. The second unlocking protrusion 551 and the unlocking turntable 520 are respectively provided with a first unlocking recess 521 on the periphery of the second unlocking protrusion 551. The second unlocking protrusion 551 passes through the rotating seat 200 and can be inserted into the first unlocking recess 521. The third locking member 560 is movably sleeved on the rotating shaft 210 and located below the first adjusting wheel 220. The third locking member 560 has a second locking protrusion 561 on the side facing the adjusting bar 130. The adjusting bar 130 is provided with a lock corresponding to the second locking protrusion 561. The locking groove 132 extends in the same direction as the strip groove 121. The third locking member 560 is rotatably engaged with the second locking member 550 and can move with the second locking member 550. The second locking member 550 or the third locking member 560 is equipped with a third elastic member 570. The third elastic member 570 can make the second locking member 550 and the third locking member 560 tend to move towards the unlocking rotary table 520 and make the second unlocking protrusion 551 abut against the circumference of the unlocking rotary table 520. When the second unlocking protrusion 551 abuts against the periphery of the unlocking turntable 520, the second locking protrusion 561 inserts into the locking groove 132 to restrict the first locking tooth 131 from disengaging from the first engaging recess 221. The unlocking turntable 520 can rotate so that the first unlocking recess 521 corresponds to the second unlocking protrusion 551, so that under the action of the third elastic member 570, the second unlocking protrusion 551 can be inserted into the first unlocking recess 521 and the second locking protrusion 561 can disengage from the locking groove 132.

[0042] Understandably, such as Figures 2 to 7 as well as Figure 10As shown, the second locking member 550 is movably sleeved on the rotating shaft 210, and its movement direction is perpendicular to the axis of the unlocking turntable 520. The second locking member 550 has a second unlocking protrusion 551 on the side facing the unlocking turntable 520. The second unlocking protrusion 551 passes through the rotating seat 200 and extends downwards. The third locking member 560 is movably sleeved on the rotating shaft 210 and located below the first adjusting wheel 220. It can move up and down and rotate relative to the rotating shaft 210. The third locking member 560 is located above the second locking member 550. The upper side of the second locking member 550 has an annular flange 552, and the third locking member 560 has a corresponding hook 562. The hook 562... The third locking member 560 and the second locking member 550 are rotated together in conjunction with the annular flange 552, so that the third locking member 560 can move up and down with the second locking member 550 and can also rotate relative to the second locking member 550. The third locking member 560 has a second locking protrusion 561 on the side facing the adjusting bar 130. The adjusting bar 130 is provided with a locking groove 132 corresponding to the second locking protrusion 561. The locking groove 132 extends in the front-back direction and its extension direction is consistent with the strip groove 121. The third elastic member 570 acts on the third locking member 560, so that the third locking member 560 and the second locking member 550 have a tendency to move towards the unlocking turntable 520. After the planar position adjustment of the support component 100 relative to the rotating seat 200 is completed, the knob 510 can be rotated, and the unlocking turntable 520 rotates accordingly, causing the first unlocking recess 521 to rotate away from the position corresponding to the second unlocking protrusion 551. At this time, the circumference of the unlocking turntable 520 presses against the second unlocking protrusion 551 and compresses the third elastic member 570. The second unlocking protrusion 551 disengages from the first unlocking recess 521 and abuts against the circumference of the unlocking turntable 520. The second locking member 550 drives the third locking member 560 to compress the third elastic member 570 and move it upward, causing the second locking protrusion 561 to insert into the locking groove 132. After the second locking protrusion 561 inserts into the locking groove 132, the adjusting bar 130 cannot move away from the first adjusting wheel 220, thus limiting the movement. The first locking tooth 131 disengages from the first engaging recess 221, locking the planar adjustment structure and preventing any impact on the planar position adjustment of the support component 100 relative to the rotating seat 200, thus achieving reliable position locking. When unlocking is required, the knob 510 is rotated, causing the unlocking turntable 520 to rotate until the first unlocking recess 521 aligns with the second unlocking protrusion 551. At this time, under the action of the third elastic member 570, the second locking member 550 and the third locking member 560 move downwards, and the second unlocking protrusion 551 inserts into the first unlocking recess 521. Simultaneously, the second locking protrusion 561 disengages from the locking groove 132, thereby releasing the movement restriction of the adjusting strip 130, allowing the user to adjust the planar position of the support component 100 relative to the rotating seat 200.

[0043] In practical applications, in addition to the above-mentioned structure, the locking structure can also be varied according to the specific structure of the planar adjustment structure. For example, the first adjusting wheel 220 is rotatably mounted on the upper side of the rotating shaft 210, and the adjusting bar 130 is provided and fixedly mounted on the lower housing 120. The adjusting bar 130 is located beside the first adjusting wheel 220 and cooperates with it to form a gear and rack structure. When the lower housing 120 is moved back and forth or rotated horizontally, the first adjusting wheel 220 will rotate relative to the adjusting bar 130. When locking, the second locking member 550 or the third locking member 560, which moves up and down, is used to insert or disengage the second locking protrusion 561 into the first adjusting wheel 220, thereby controlling its locking or unlocking. Alternatively, the second locking member 550 or the third locking member 560, which moves up and down, can drive the first adjusting wheel 220 to move up and down, so that it inserts into the fixedly mounted locking protrusion, thereby achieving its locking or unlocking. The specific configuration can be varied according to the actual needs of use.

[0044] Furthermore, the third locking member 560 is slidably engaged with the lower housing 120. When the supporting assembly 100 translates relative to the rotating seat 200, the third locking member 560 can move relative to the lower housing 120. When the supporting assembly 100 rotates relative to the rotating seat 200, the third locking member 560 can rotate with the lower housing 120.

[0045] Understandably, by setting the third locking member 560 to slide with the lower housing 120, the third locking member 560 can rotate along with the lower housing 120 when it rotates. When the lower housing 120 moves back and forth, the third locking member 560 will move relative to it, causing the second locking protrusion 561 to adjust its position relative to the locking groove 132. This ensures that after the support assembly 100 completes the planar position adjustment, the second locking protrusion 561 can effectively insert into the locking groove 132, achieving reliable position locking. In practical applications, the specific mating structure between the third locking member 560 and the lower housing 120 can be set according to actual usage requirements.

[0046] In some embodiments, the pitch adjustment structure includes a second adjustment wheel 230 and an adjustment member 350. The rotating base 200 is provided with a rotating arm 240, and the first connecting assembly 300 further includes a connecting base 330. The rotating arm 240 is rotatably connected to the connecting base 330. The second adjustment wheel 230 is fixedly disposed on the rotating arm 240 and can rotate with the rotating arm 240. The adjustment member 350 is movably disposed on the connecting base 330, and the moving direction of the adjustment member 350 is perpendicular to the axial direction of the second adjustment wheel 230. A plurality of adjustment members are spaced apart on the circumference of the second adjustment wheel 230. The second engaging recess 231, the adjusting member 350 is provided with a second locking tooth 351 on the side facing the second adjusting wheel 230, which can cooperate with the second engaging recess 231. The adjusting member 350 has a fourth elastic member 360. The fourth elastic member 360 can make the adjusting member 350 abut against the second adjusting wheel 230 and make the second locking tooth 351 engage in the second engaging recess 231. The adjusting member 350 can overcome the force of the fourth elastic member 360 and move away from the second adjusting wheel 230, so that the second locking tooth 351 disengages from the second engaging recess 231.

[0047] Understandably, such as Figure 2 , Figure 4 , Figure 5 , Figure 8 , Figure 9 and Figure 10As shown, the connecting seat 330 has a through-hole mounting cavity, and two side covers 331 are detachably fixed on both sides. A knob 510 is fixedly connected to a central rotating shaft 511. The central rotating shaft 511 passes through one side cover 331 and rotates in cooperation with the other side cover 331. A rotating arm 240 is located on the lower side of the rotating seat 200 and extends into the mounting cavity of the connecting seat 330. The rotating arm 240 is fixedly connected to the second adjusting wheel 230 to drive the second adjusting wheel 230 to rotate. The central rotating shaft 511 passes through the rotating arm 240 and the second adjusting wheel 230 and can rotate relative to them, thus realizing the rotation of the rotating arm 240 and the second adjusting wheel 230. The rotating connection of the connecting seat 330 also completes the rotating connection of the knob 510, and the rotation axes of both are parallel to the left and right directions; the adjusting member 350 is movably disposed on the connecting seat 330 and the moving direction of the adjusting member 350 is perpendicular to the axis of the second adjusting wheel 230. The second adjusting wheel 230 is provided with a plurality of second engaging recesses 231 at intervals on its circumference. The adjusting member 350 is provided with a second engaging tooth 351 on the side facing the second adjusting wheel 230. The fourth elastic member 360 acts on the adjusting member 350 and the connecting seat 330 respectively, so that the adjusting member 350 has a tendency to move towards the second adjusting wheel 230. When the pitch angle of the support assembly 100 needs to be adjusted, the rotating seat 200 is operated. The rotating seat 200 drives the support assembly 100 to rotate together. When the rotating seat 200 rotates, the second adjusting wheel 230 also rotates together. Its outer periphery will squeeze the adjusting member 350, causing the adjusting member 350 to compress the fourth elastic member 360 and move away from the second adjusting wheel 230. This causes the second locking tooth 351 to disengage from the second engaging recess 231. After the adjustment is completed, the adjusting member 350 will be reset under the action of the fourth elastic member 360. It will abut against the second adjusting wheel 230 again and cause the second locking tooth 351 to engage with the corresponding second engaging recess 231, thereby temporarily fixing the pitch angle of the adjusted support assembly 100.

[0048] In practical applications, the second engagement recess 231 can also be set on the adjusting member 350, and the second engagement tooth 351 is set on the second adjusting wheel 230. The specific settings can be made according to the actual needs of use.

[0049] In some embodiments, the locking structure includes an unlocking turntable 520, which is rotatably mounted on the connecting seat 330 and linked with the knob 510, and can rotate with the knob 510. The rotation axis of the unlocking turntable 520 is collinear with the rotation axis of the rotating arm 240. The unlocking turntable 520 has an arc-shaped locking wall 522. The adjusting member 350 has a third locking protrusion 352 on the side facing the unlocking turntable 520, and the arc-shaped locking wall 522 is provided with a third locking protrusion 352 corresponding to the third locking protrusion 352. The second unlocking recess 523 and the third locking protrusion 352 are located on the inner side of the arc-shaped locking wall 522. The arc-shaped locking wall 522 can contact the third locking protrusion 352 to restrict the second locking tooth 351 from disengaging from the second engaging recess 231. The unlocking turntable 520 can rotate to make the second unlocking recess 523 correspond to the third locking protrusion 352. When the adjusting member 350 moves away from the second adjusting wheel 230, the third locking protrusion 352 can enter the second unlocking recess 523.

[0050] Understandably, such as Figure 2 , Figure 4 , Figure 5 , Figure 8 , Figure 9 and Figure 10 As shown, the central rotating shaft 511 passes through the unlocking turntable 520, which rotates with the central rotating shaft 511 to achieve linkage with the knob 510. The unlocking turntable 520 is located on the left and / or right side of the adjusting member 350. The adjusting member 350 has a third locking protrusion 352 extending in the left and right direction on the side facing the unlocking turntable 520. The unlocking turntable 520 is correspondingly provided with an arc-shaped locking wall 522, and a second unlocking recess 523 is provided on the arc-shaped locking wall 522 corresponding to the third locking protrusion 352. After the pitch angle adjustment of the support component 100 is completed, the knob 510 can be rotated, and the unlocking turntable 520 rotates accordingly, causing the second unlocking recess 523 to rotate away from the position corresponding to the third locking protrusion 352. At this time, the third locking protrusion 352 is located on the inner side of the arc of the arc-shaped locking wall 522, and the arc-shaped locking wall 522 can contact the third locking protrusion 352. The adjusting member 350 cannot move away from the second adjusting wheel 230, thereby restricting the second locking tooth 351 from disengaging from the second locking recess 231, realizing the locking of the pitch adjustment structure and avoiding interference. The pitch angle adjustment of the support component 100 achieves reliable position locking. When unlocking is required, the knob 510 is turned so that the unlocking dial 520 rotates to the second unlocking recess 523 corresponding to the third locking protrusion 352. At this time, the rotating seat 200 can be operated, and the adjusting member 350 will compress the fourth elastic member 360 and move away from the second adjusting wheel 230. The third locking protrusion 352 can enter the second unlocking recess 523, thereby releasing the movement restriction of the adjusting member 350. The user can adjust the pitch angle of the support component 100.

[0051] In practical applications, in addition to the above-mentioned structure, the locking structure can also be changed according to the specific structure of the pitch adjustment structure. For example, a movable nut seat can be provided on the connecting seat 330, and an insertion hole for the third locking protrusion 352 to be inserted into can be provided on the nut seat. The knob 510 and the nut seat are driven by a screw structure. Rotating the knob 510 can drive the nut seat to move closer to or away from the adjusting member 350, thereby allowing the third locking protrusion 352 to be inserted into or disengaged from the locking hole, thus locking or unlocking it. Alternatively, a locking protrusion can be provided on the nut seat, allowing it to move directly into or out of the rotating arm 240, thereby locking or unlocking it. The specific changes can be made according to the actual needs of use.

[0052] A seat according to a second aspect of the present invention includes an adjustable armrest device according to the first aspect of the present invention described above.

[0053] According to an embodiment of the present invention, the seat, by adopting the above-described adjustable armrest device, can switch the locking and unlocking of different dimensions of the locking structure by rotating a knob 510, which can improve the reliability of the position locking after the armrest is adjusted, and also helps to simplify the appearance structure and facilitate user operation.

[0054] Since other components of the seat in this embodiment of the invention are known to those skilled in the art, they will not be described in detail here.

[0055] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An adjustable handrail device, characterized in that, The system includes a support assembly, a rotating base, a first connecting assembly, and a second connecting assembly. The first connecting assembly includes a first tube, and the second connecting assembly includes a second tube that is inserted into the first tube. A telescopic adjustment structure connects the first and second connecting assemblies, allowing relative telescopic movement between the first and second tubes. The support assembly is mounted on the rotating base and has a planar adjustment structure between them. The support assembly can translate and rotate relative to the rotating base via the planar adjustment structure. The rotating base is rotatably positioned above the first connecting assembly. Furthermore, a pitch adjustment structure is provided between them. The rotating seat can rotate relative to the first connecting component through the pitch adjustment structure to adjust the pitch angle of the supporting component. The first connecting component is provided with a locking structure and a knob linked to the locking structure. The locking structure can lock or unlock the telescopic adjustment structure, the plane adjustment structure, and the pitch adjustment structure. The knob can rotate and switch the locking or unlocking state of the locking structure for the telescopic adjustment structure, the plane adjustment structure, and the pitch adjustment structure.

2. The adjustable armrest device according to claim 1, characterized in that, The telescopic adjustment structure includes an adjustment shaft and an adjustment sleeve. The adjustment sleeve is fixedly disposed at the upper end of the second tube body, and the second tube body is movably inserted into the first tube body. The first connecting assembly also includes a connecting seat. The upper end of the adjustment shaft is fixedly connected to the connecting seat. The connecting seat is disposed on the upper side of the first tube body and is pivotally connected to the first tube body via the adjustment shaft. The adjustment shaft passes through the adjustment sleeve and extends into the second tube body. The adjustment shaft is provided with a plurality of stop protrusions spaced apart along the axial direction. The inner side of the adjustment sleeve is provided with a stop groove that can cooperate with the stop protrusions. The connecting seat can rotate relative to the first tube body and drive the adjustment shaft to rotate relative to the adjustment sleeve, so that the stop protrusions rotate into the stop grooves or rotate out of the stop grooves. When the stop protrusions cooperate with the stop grooves, they can restrict the telescopic movement between the first tube body and the second tube body. When the stop protrusions are separated from the stop grooves, the first tube body and the second tube body can telescopically move.

3. The adjustable handrail device according to claim 2, characterized in that, The lower end of the adjusting shaft is connected to a limiting block that contacts the inner wall of the second tube. The limiting block can abut against the lower side of the adjusting sleeve to limit the telescopic movement between the first tube and the second tube.

4. The adjustable handrail device according to claim 2, characterized in that, The locking structure includes a first locking member and an unlocking turntable. The unlocking turntable is rotatably mounted on the connecting seat and linked with the knob, rotating with the knob. The first locking member is movably mounted on the connecting seat, and the direction of movement of the first locking member is perpendicular to the axis of the unlocking turntable. The first locking member has a first unlocking protrusion on its side facing the unlocking turntable, and a first unlocking recess is provided on the periphery of the unlocking turntable corresponding to the first unlocking protrusion. The first locking member has a first locking protrusion on its side away from the unlocking turntable, and a locking hole is provided on the first tube body corresponding to the first locking protrusion. The first locking protrusion passes through the connecting seat and can... The locking member is inserted into the locking hole. The first locking member has a first elastic element. The first elastic element causes the first locking member to tend to move towards the unlocking turntable and cause the first unlocking protrusion to abut against the circumference of the unlocking turntable. When the first unlocking protrusion abuts against the circumference of the unlocking turntable, the first locking protrusion is inserted into the locking hole to restrict the relative rotation between the connecting seat and the first tube body. The unlocking turntable can rotate so that the first unlocking recess corresponds to the first unlocking protrusion, so that the first unlocking protrusion can be inserted into the first unlocking recess and the first locking protrusion can be disengaged from the locking hole under the action of the first elastic element.

5. The adjustable armrest device according to claim 1, characterized in that, The planar adjustment structure includes a first adjusting wheel and an adjusting bar. The upper side of the rotating seat is provided with a rotating shaft. The supporting assembly includes a lower housing seat with a strip groove. The rotating shaft passes through the strip groove and passes through the lower housing seat. The first adjusting wheel is fixedly disposed on the upper side of the rotating shaft. The adjusting bar is movably disposed on the lower housing seat, and the moving direction of the adjusting bar is perpendicular to the extending direction of the strip groove. The circumference of the first adjusting wheel is provided with a plurality of first engaging recesses. The adjusting bar is provided with corresponding first engaging teeth that can engage with the first engaging recesses. The first engaging teeth are provided in a plurality and arranged along the extending direction of the strip groove on the side of the adjusting bar facing the first adjusting wheel. The adjusting bar is acted upon by a second elastic member. The second elastic member enables the adjusting bar to abut against the first adjusting wheel and engage the first engaging teeth into the first engaging recesses. The adjusting bar can overcome the force of the second elastic member and move away from the first adjusting wheel, causing the first engaging teeth to disengage from the first engaging recesses.

6. The adjustable armrest device according to claim 5, characterized in that, The locking structure includes a second locking member, a third locking member, and an unlocking turntable. The unlocking turntable is rotatably mounted on the first connecting assembly and linked to the knob, rotating with the knob. The second locking member is movably mounted on the rotating base, and the direction of movement of the second locking member is perpendicular to the axis of the unlocking turntable. The second locking member has a second unlocking protrusion on its side facing the unlocking turntable, and a first unlocking recess is provided on the periphery of the unlocking turntable corresponding to the second unlocking protrusion. The second unlocking protrusion passes through the rotating base and can be inserted into the first unlocking recess. The third locking member is movably sleeved on the rotating shaft and located below the first adjusting wheel. The third locking member has a second locking protrusion on its side facing the adjusting bar, and a locking groove is provided on the adjusting bar corresponding to the second locking protrusion. The stop groove extends in the same direction as the strip groove. The third locking member is rotatably engaged with the second locking member and can move with the second locking member. The second locking member or the third locking member is equipped with a third elastic member. The third elastic member can cause the second locking member and the third locking member to tend to move towards the unlocking turntable and cause the second unlocking protrusion to abut against the circumference of the unlocking turntable. When the second unlocking protrusion abuts against the circumference of the unlocking turntable, the second locking protrusion is inserted into the locking groove to restrict the first locking tooth from disengaging from the first engaging recess. The unlocking turntable can rotate to make the first unlocking recess correspond to the second unlocking protrusion, so that under the action of the third elastic member, the second unlocking protrusion can be inserted into the first unlocking recess and the second locking protrusion can disengage from the locking groove.

7. The adjustable armrest device according to claim 6, characterized in that, The third locking member is slidably engaged with the lower housing. When the supporting assembly translates relative to the rotating seat, the third locking member can move relative to the lower housing. When the supporting assembly rotates relative to the rotating seat, the third locking member can rotate with the lower housing.

8. The adjustable handrail device according to claim 1, characterized in that, The pitch adjustment structure includes a second adjusting wheel and an adjusting member. The rotating base is provided with a rotating arm. The first connecting assembly also includes a connecting seat. The rotating arm is rotatably connected to the connecting seat. The second adjusting wheel is fixedly disposed on the rotating arm and can rotate with the rotating arm. The adjusting member is movably disposed on the connecting seat, and the moving direction of the adjusting member is perpendicular to the axial direction of the second adjusting wheel. The second adjusting wheel has a plurality of second engaging recesses spaced apart on its circumference. The adjusting member has a corresponding second locking tooth portion on the side facing the second adjusting wheel that can engage with the second engaging recess. The adjusting member is acted upon by a fourth elastic member. The fourth elastic member can cause the adjusting member to abut against the second adjusting wheel and cause the second locking tooth portion to engage with the second engaging recess. The adjusting member can overcome the force of the fourth elastic member and move away from the second adjusting wheel, causing the second locking tooth portion to disengage from the second engaging recess.

9. The adjustable armrest device according to claim 8, characterized in that, The locking structure includes an unlocking turntable, which is rotatably mounted on the connecting seat and linked with the knob, rotating with the knob. The rotation axis of the unlocking turntable is collinear with the rotation axis of the rotating arm. The unlocking turntable has an arc-shaped locking wall. The adjusting member has a third locking protrusion on the side facing the unlocking turntable. The arc-shaped locking wall has a second unlocking recess corresponding to the third locking protrusion. The third locking protrusion is located on the inner arc of the arc-shaped locking wall. The arc-shaped locking wall can contact the third locking protrusion to prevent the second locking tooth from disengaging from the second locking recess. The unlocking turntable can rotate to make the second unlocking recess correspond to the third locking protrusion. When the adjusting member moves away from the second adjusting wheel, the third locking protrusion can enter the second unlocking recess.

10. A type of seat, characterized in that, Includes the adjustable handrail device according to any one of claims 1 to 9.

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