Adjustable armrest for seat and seat

Abstract

The utility model discloses an adjustable armrest for a seat and the seat, and belongs to the technical field of seats, the adjustable armrest comprises an armrest body, a mounting plate, a connecting shell and a first locking component, the armrest body is arranged at the upper end of the connecting shell, and the lower end of the connecting shell is rotatably arranged on the mounting plate around a set axis; the first locking assembly comprises a first swing rod which is rotationally arranged in the connecting shell and is provided with a first clamping part; the first reset piece is arranged between the first swing rod and the connecting shell and enables the first swing rod to have the tendency of swinging towards the first position to apply pressure to the first swing rod; the connecting block is fixedly arranged on the connecting end and is provided with a plurality of clamping teeth distributed in the circumferential direction of a set axis; the first clamping part is clamped into the clamping teeth when the first swing rod is located at the first position, and the first clamping part is separated from the clamping teeth when the first swing rod is located at the second position. By means of the armrest, stability of the armrest can be guaranteed, and meanwhile a user can conveniently adjust the inclination angle of the armrest body relative to the seat frame.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of seat, concretely relates to an adjustable handrail for seat and seat. BACKGROUND

[0002] In order to improve user comfort, most of the seats on the market will be equipped with handrails, and the inclination angle of the handrail relative to the seat frame can generally be adjusted according to user needs. In related technologies, the inclination angle of the handrail is generally adjusted by electric or manual methods. The electric method is generally used in car seats, massage chairs and other scenarios due to its high cost. The manual method generally includes a damping adjustment structure and a locking and unlocking structure. The damping adjustment structure is a damping structure arranged between the handrail and the seat frame. When a user applies a large force to the handrail, the handrail can be driven to swing relative to the seat frame. However, in actual application, the handrail may swing even if the user has no intention to adjust it, for example, when the user leans sideways, the handrail may swing downward. At this time, the handrail does not play a supporting role for the user. SUMMARY

[0003] The utility model aims at providing an adjustable handrail for seat and seat, which can ensure the stability of the handrail while allowing the user to adjust the inclination angle of the handrail body relative to the seat frame.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The adjustable handrail for seat includes a handrail body and a mounting plate for mounting with a seat frame. The adjustable handrail further includes a connecting housing and a first locking assembly. The handrail body is arranged at the upper end of the connecting housing. The mounting plate is provided with a connecting end. The lower end of the connecting housing is arranged on the connecting end in rotation around a specified axis. The specified axis extends in the width direction of the seat.

[0006] The first locking assembly includes:

[0007] A first swing lever is arranged in the connecting housing and has a first clamping portion. The first swing lever has a first position and a second position relative to the connecting housing.

[0008] A first reset member is arranged between the first swing lever and the connecting housing and applies pressure to the first swing lever to make the first swing lever have a tendency to swing to the first position.

[0009] A connecting block is fixedly arranged on the connecting end and has a plurality of clamping teeth distributed in the circumferential direction of the specified axis.

[0010] The first clamping part is clamped into the clamping tooth when the first swing lever is at the first position, and the first clamping part is disengaged from the clamping tooth when the first swing lever is at the second position.

[0011] Preferably, the first swing lever is rotationally arranged in the connecting housing through a first rotation shaft, and a pressing part and the first clamping part are respectively formed on two sides of the first swing lever at the first rotation shaft, and the pressing part is used to drive the first swing lever to swing from the first position to the second position in response to an external force.

[0012] Preferably, the adjustable handrail further comprises a button, the connecting housing is provided with an opening, and the button extends into the connecting housing through the opening and abuts against the pressing part.

[0013] Preferably, the connecting housing comprises a connecting outer shell and a connecting inner shell, the connecting inner shell extends into the connecting outer shell and is arranged to slide relative to the connecting outer shell along a set direction, the handrail body is arranged at the top end of the connecting inner shell, the bottom end of the connecting outer shell is rotationally connected with the connecting end head, the adjustable handrail further comprises a second locking assembly, the second locking assembly comprises a second swing lever rotationally arranged in the connecting inner shell and formed with a second clamping part, the second swing lever has a third position and a fourth position relative to the connecting inner shell, and a second reset member arranged between the second swing lever and the connecting inner shell and pressing the second swing lever so that the second swing lever has a tendency to swing to the third position; and wherein the connecting outer shell is provided with a plurality of clamping grooves distributed along the set direction, the second clamping part is clamped into the clamping groove when the second swing lever is at the third position, and the second clamping part is disengaged from the clamping groove when the second swing lever is at the fourth position.

[0014] Preferably, the second swing lever is rotationally arranged in the connecting inner shell through a second rotation shaft, and a pulling part and the second clamping part are respectively formed on two sides of the second swing lever at the second rotation shaft, and the pulling part extends out of the connecting inner shell to the outside.

[0015] Preferably, the first swing lever is arranged outside the connecting inner shell and rotationally arranged on the inner wall of the connecting outer shell, and the connecting housing further comprises a partition plate fixedly arranged in the connecting outer shell and separating the first swing lever from the connecting inner shell.

[0016] Preferably, the partition plate and the inner wall of the connecting outer shell are both provided with a limiting sliding groove extending along the set direction, the connecting inner shell is provided with a limiting protruding part matched with the limiting sliding groove, and the limiting protruding part extends into the limiting sliding groove and is slidingly matched.

[0017] Preferably, the connecting shell comprises a first shell and a second shell arranged in the first shell, the connecting inner shell is slidingly arranged in the second shell, the clamping slot is formed on the second shell, and the bottom end of the first shell is formed with an adapter end head, and the adapter end head is rotationally arranged on the connecting end head.

[0018] Preferably, the connecting end head comprises a first arc-shaped slot formed at one end of the mounting plate, a first circular plate and a second circular plate formed in the first arc-shaped slot, the first circular plate and the second circular plate are arranged in a spaced manner, and the connecting block is fixedly arranged between the first circular plate and the second circular plate; the adapter end head comprises a second arc-shaped slot formed at the bottom end of the first shell and a third circular plate and a fourth circular plate formed on both sides of the second arc-shaped slot; the third circular plate and the fourth circular plate are clamped on both sides of the first circular plate and the second circular plate, and the third circular plate and the fourth circular plate are rotationally arranged in the first arc-shaped slot, and the first circular plate and the second circular plate are rotationally arranged in the second arc-shaped slot.

[0019] Preferably, the handrail body comprises a first handrail structure with a first handrail surface and a second handrail structure with a second handrail surface, the second handrail surface is larger than the first handrail surface, the first handrail structure is rotationally arranged at the top end of the connecting shell, and the second handrail structure is rotationally arranged at the top end of the first handrail structure; the adjustable handrail further comprises a third locking mechanism for locking the first handrail structure with the connecting shell and a fourth locking mechanism for locking the second handrail structure with the first handrail structure.

[0020] Preferably, the first handrail structure comprises a first bottom shell formed with a first cavity and a first cover plate arranged on the first bottom shell, and the first cover plate is formed with the first handrail surface; the first bottom shell is provided with a first through hole, the top end of the connecting shell is provided with a first connecting protrusion extending into the first cavity through the first through hole, the inner wall of the first bottom shell is formed with a first tooth groove distributed around the first connecting protrusion, the third locking mechanism comprises a first connecting member arranged in the first cavity, a first engaging block capable of engaging with the first tooth groove, and a first elastic member arranged between the first engaging block and the first connecting member; the first connecting member is rotationally matched with the first bottom shell and fixedly connected with the first connecting protrusion, and the first elastic member presses the first engaging block so that the first engaging block has a tendency to be clamped into the first tooth groove.

[0021] Preferably, the second armrest structure comprises a second bottom shell forming a second accommodating cavity and a second cover plate arranged on the second bottom shell, the second cover plate forms the second armrest surface; the second bottom shell is provided with a second through hole, the first armrest surface forms a second connecting protrusion extending into the second accommodating cavity through the second through hole, the fourth locking mechanism comprises a connecting frame arranged in the second accommodating cavity, a second connecting member arranged in the connecting frame, a second engaging block arranged on the second connecting member and a second elastic member arranged between the second engaging block and the second connecting member; the second connecting member is rotationally fitted with the second bottom shell and fixedly connected with the second connecting protrusion, an inner ring of the connecting frame forms a second tooth groove distributed around the second connecting member, the second engaging block is in meshing fit with the second tooth groove, and the second elastic member presses the second engaging block so that the second engaging block has a tendency to be clamped into the second tooth groove.

[0022] Preferably, the second through hole is an oblong hole extending along the length direction of the armrest body, the second connecting protrusion is in sliding fit with the second through hole; the inner wall of the second bottom shell forms a baffle on both sides of the connecting frame, an inner ring of the baffle forms a third tooth groove distributed along the length direction of the armrest body, and the adjustable armrest further comprises a third engaging block arranged on the connecting frame and a third elastic member arranged between the third engaging block and the connecting frame, the third engaging block is capable of being in meshing fit with the third tooth groove, and the third elastic member presses the third engaging block so that the third engaging block has a tendency to be clamped into the third tooth groove.

[0023] In addition, in order to achieve the above object, the utility model also adopts the following technical scheme:

[0024] The seat comprises a seat frame, and the adjustable armrest is mounted on the seat frame through the mounting plate.

[0025] Compared with the prior art, the utility model has the beneficial effects that:

[0026] The armrest body is rotationally arranged on the connecting end head of the mounting plate through the connecting shell, the first locking assembly is arranged between the connecting shell and the connecting end head, the first clamping portion on the first swing rod is clamped with or separated from the clamping tooth on the connecting block through the swing action of the first swing rod, so that the connecting shell and the connecting end head can be locked or unlocked. When the connecting shell and the connecting end head are locked, the stability of the armrest body relative to the seat frame of the seat can be ensured; when the connecting shell and the connecting end head are unlocked, the angle of the armrest body relative to the seat frame can be conveniently and quickly adjusted. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A structural schematic view of an adjustable armrest for a seat is provided for the embodiments of the present application.

[0028] Figure 2 isometric view of the adjustable handrail;

[0029] Figure 3 is Figure 2 isometric view of the adjustable handrail;

[0030] Figure 4 isometric view of the adjustable handrail with the first swing lever in the first position and the second swing lever in the third position (hiding the connection of the inner shell with the partition plate);

[0031] Figure 5 isometric view of the adjustable handrail with the first swing lever in the second position and the second swing lever in the fourth position (hiding the connection of the inner shell with the partition plate);

[0032] Figure 6 isometric view of the assembly of the connection end and the adapter end;

[0033] Figure 7 isometric view of the assembly of the connection end and the adapter end; Figure 1

[0034] Figure 8 isometric view of the assembly of the connection end and the adapter end; Figure 2

[0035] ​​1, handrail body; 10, first handrail structure; 100, first handrail surface; 1000, second connecting protrusion; 101, first bottom shell; 1010, first through hole; 1011, first gear slot; 102, first cover plate; 11, second handrail structure; 110, second handrail surface; 111, second bottom shell; 1110, second through hole; 1111, third gear slot; 112, second cover plate; 2, mounting plate; 20, connecting end; 200, first arc-shaped slot; 201, first circular plate; 202, second circular plate; 3, connecting shell; 30, connecting housing; 300, first housing; 3000, second arc-shaped slot; 3001, third circular plate; 3002, fourth circular plate; 301, second housing; 3010, clamping groove; 3011, second limiting sliding slot; 31, connecting inner housing; 310, limiting protrusion; 311, first connecting protrusion; 32, partition plate; 320, first limiting sliding slot; 4, first locking assembly; 40, first swing rod; 400, first clamping part; 401, rotating shaft hole; 402, button; 41, first reset piece; 42, connecting block; 420, clamping tooth; 5, second locking assembly; 50, second swing rod; 500, second clamping part; 501, second rotating shaft; 502, pulling part; 51, second reset piece; 6, third locking mechanism; 60, first connecting member; 61, first meshing block; 62, first elastic piece; 7, fourth locking mechanism; 70, connecting frame; 700, second gear slot; 71, second connecting member; 72, second meshing block; 73, second elastic piece; 8, third meshing block; 9, third elastic piece. DETAILED DESCRIPTION

[0036] The utility model will be further described below in combination with the drawings and specific embodiment, it is explained that, under the premise of not conflicting, the following described each embodiment or each technical feature between can be combined to form new embodiment arbitrarily. Except special explanation, the material and equipment adopted in this embodiment can be bought from market. The example of the embodiment is shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the application, and cannot be understood as limiting the application.

[0037] In the description of the application, it needs to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise specifically specified and limited.

[0038] In the description of the application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "connected", "communicated", "connected" should be understood in a broad sense, for example, it can be fixedly connected, it can be connected through an intermediate medium, it can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0039] The embodiment provides an adjustable armrest for a seat, as shown in Figure 1 、 Figure 2 and Figure 3 , the adjustable armrest comprises an armrest body 1, a mounting plate 2, a connecting shell 3 and a first locking assembly 4. Wherein, the mounting plate 2 is used for mounting with the seat frame of the seat, the mounting plate 2 is provided with a connecting end 20, the lower end of the connecting shell 3 is rotationally arranged on the connecting end 20 around a set axis, and the armrest body 1 is arranged at the upper end of the connecting shell 3. The set axis extends along the width direction of the seat. The first locking assembly 4 in the embodiment comprises a first swing rod 40, a first reset member 41 and a connecting block 42. Wherein, the first swing rod 40 is rotationally arranged in the connecting shell 3 and is formed with a first clamping portion 400, the first swing rod 40 has a first position and a second position relative to the connecting shell 3, that is, the first swing rod 40 can be switched between the first position and the second position through the swinging action relative to the connecting shell 3. The first reset member 41 is arranged between the first swing rod 40 and the connecting shell 3 and presses the first swing rod 40 so that the first swing rod 40 has a tendency to swing to the first position. The connecting block 42 is fixedly arranged on the connecting end 20 and is formed with a plurality of clamping teeth 420 distributed along the circumference of the set axis. As shown in Figure 4 and Figure 5 , the first clamping portion 400 in the embodiment is clamped into the clamping teeth 420 when the first swing rod 40 is in the first position, and the first clamping portion 400 is out of the clamping teeth 420 when the first swing rod 40 is in the second position.

[0040] The handrail body 1 is rotatably arranged on the connecting end 20 of the mounting plate 2 through the connecting shell 3. The first locking assembly 4 is arranged between the connecting shell 3 and the connecting end 20. The first clamping portion 400 on the first swing lever 40 is clamped or separated from the clamping tooth 420 on the connecting block 42 through the swing action of the first swing lever 40, so that the connecting shell 3 and the connecting end 20 can be locked or unlocked. When the connecting shell 3 and the connecting end 20 are locked, the stability of the handrail body 1 relative to the seat frame of the seat can be ensured. When the connecting shell 3 and the connecting end 20 are unlocked, the angle adjustment of the handrail body 1 relative to the seat frame can be conveniently and quickly realized.

[0041] Specifically, in the embodiment, the first swing lever 40 is rotatably arranged in the connecting shell 3 through a first rotating shaft (not shown in the figure). As shown in Figure 2 The rotating shaft hole 401 for arranging the first rotating shaft is arranged on the first swing lever 40. The pressure receiving portion and the first clamping portion 400 are respectively formed on both sides of the first rotating shaft on the first swing lever 40. The pressure receiving portion is used to drive the first swing lever 40 to swing from the first position to the second position in response to the external force. That is, after the external force is applied to the pressure receiving portion, the first swing lever 40 can be driven to swing from the first position to the second position by overcoming the action force of the first return member 41, and correspondingly, the first clamping portion 400 is separated from the clamping tooth 420, so that the connecting shell 3 can be adjusted in rotation relative to the mounting plate 2. After the external force is removed, the first swing lever 40 can swing from the second position to the first position under the pressure action of the first return member 41, and correspondingly, the first clamping portion 400 is clamped into the clamping tooth 420.

[0042] Further, the adjustable handrail provided by the embodiment further comprises a button 402. The connecting shell 3 is provided with an opening, and the button 402 extends into the connecting shell 3 through the opening and abuts against the pressure receiving portion. It is easy to understand that the button 402 can be provided with a buckle structure, and the buckle structure can prevent the button 402 from being separated from the connecting shell 3.

[0043] Specifically, in the embodiment, the connecting shell 3 comprises a connecting outer shell 30 and a connecting inner shell 31. The connecting inner shell 31 extends into the connecting outer shell 30 and is slidably arranged along a certain direction relative to the connecting outer shell 30. The handrail body 1 is arranged at the top end of the connecting inner shell 31, and the bottom end of the connecting outer shell 30 is rotatably connected with the connecting end 20. Figure 2 and Figure 3As shown, the adjustable armrest provided in this embodiment further includes a second locking component 5. The second locking component 5 includes a second swing rod 50 and a second reset member 51. The second swing rod 50 is rotatably disposed within the connecting inner shell 31 and has a second engaging portion 500 formed thereon. The second swing rod 50 has a third position and a fourth position relative to the connecting inner shell 31. That is, the second swing rod 50 can be switched between the third position and the fourth position through a swinging motion relative to the connecting inner shell 31. The second reset member 51 is disposed between the second swing rod 50 and the connecting inner shell 31 and presses on the second swing rod 50 such that the second swing rod 50 has a tendency to swing towards the third position. In this embodiment, the connecting outer shell 30 is provided with a plurality of card slots 3010 distributed along a set direction, combined with Figure 4 and Figure 5 As shown, the second engaging portion 500 snaps into the card slot 3010 when the second swing rod 50 is in the third position, and the second engaging portion 500 disengages from the card slot 3010 when the second swing rod 50 is in the fourth position.

[0044] Through the swinging motion of the second swing rod 50, the second engaging portion 500 on the second swing rod 50 is engaged with or disengaged from the card slot 3010, so that the connecting inner shell 31 and the connecting outer shell 30 can be locked or unlocked. When the connecting inner shell 31 and the connecting outer shell 30 are locked, the stability of the armrest body 1 relative to the connecting shell 3 can be ensured; when the connecting inner shell 31 and the connecting outer shell 30 are unlocked, the armrest body 1 can be conveniently and quickly adjusted in height relative to the connecting outer shell 30 and the mounting plate 2.

[0045] Specifically, in this embodiment, as Figure 3 shown, the second swing rod 50 is rotatably disposed within the connecting inner shell 31 through a second rotating shaft 501. On both sides of the second rotating shaft 501 on the second swing rod 50, a lever portion 502 and a second engaging portion 500 are respectively formed. The lever portion 502 extends from the connecting inner shell 31 to the outside. The lever portion 502 is used to drive the second swing rod 50 to swing from the third position to the fourth position in response to an external force. That is, after the external force is applied to the lever portion 502, the second swing rod 50 can be driven to swing from the third position to the fourth position by overcoming the force of the second reset member 51. Correspondingly, the second engaging portion 500 is disengaged from the card slot 3010, and the connecting inner shell 31 can be slidably adjusted relative to the connecting outer shell 30. After the external force is withdrawn, the second swing rod 50 can swing from the fourth position to the third position under the pressure of the second reset member 51. Correspondingly, the second engaging portion 500 snaps into the card slot 3010.

[0046] To prevent interference between the first swing rod 40 and the second swing rod 50, in the embodiment, the second swing rod 50 is rotatably arranged in the connecting inner shell 31, the first swing rod 40 is arranged outside the connecting inner shell 31 and rotatably arranged on the inner wall of the connecting outer shell 30, and the connecting shell 3 further comprises a partition plate 32 fixedly arranged in the connecting outer shell 30 and separating the first swing rod 40 from the connecting inner shell 31.

[0047] In addition, to limit the sliding direction of the connecting inner shell 31 and ensure the stability of the sliding of the connecting inner shell 31, in the embodiment, the partition plate 32 and the inner wall of the connecting outer shell 30 are both provided with a limiting sliding groove extending in a set direction. For the convenience of description, the limiting sliding groove arranged on the partition plate 32 is referred to as the first limiting sliding groove 320, and the limiting sliding groove arranged on the connecting outer shell 30 is referred to as the second limiting sliding groove 3011. The connecting inner shell 31 is provided with a limiting protruding part 310 matched with the limiting sliding groove, and the limiting protruding part 310 extends into the limiting sliding groove and is slidingly matched. Specifically, in the embodiment, a pin shaft is arranged on the connecting inner shell 31, one end of the pin shaft is used as a limiting protruding part 310 and is slidingly matched with the first limiting sliding groove 320, and the other end of the pin shaft is used as another limiting protruding part 310 and is slidingly matched with the second limiting sliding groove 3011.

[0048] For the convenience of assembly of various components, in the embodiment, the connecting outer shell 30 is designed in two parts, specifically, the connecting outer shell 30 comprises a first outer shell 300 and a second outer shell 301 arranged in the first outer shell 300, the connecting inner shell 31 is slidingly arranged in the second outer shell 301, and the clamping groove 3010 is formed on the second outer shell 301. The bottom end of the first outer shell 300 is formed with an adapter end, and the adapter end is rotatably arranged on the connecting end 20.

[0049] As shown in FIG. 2, Figure 6 As shown in FIG. 2,

[0050] In addition, the connection between the handrail body 1 and the connecting shell 3 is also designed in the embodiment. Specifically, the handrail body 1 can rotate relative to the connecting shell 3 in the horizontal direction and can slide relative to the connecting shell 3 in the horizontal direction. In combination with Figure 7 and Figure 8 In the embodiment, the handrail body 1 includes a first handrail structure 10 having a first handrail surface 100 and a second handrail structure 11 having a second handrail surface 110 larger than the first handrail surface 100, the first handrail structure 10 is rotatably arranged at the top end of the connecting shell 3, and the second handrail structure 11 is rotatably arranged at the top end of the first handrail structure 10. The adjustable handrail also includes a third locking mechanism 6 for locking the first handrail structure 10 and the connecting shell 3 and a fourth locking mechanism 7 for locking the second handrail structure 11 and the first handrail structure 10.

[0051] Through the above structural design, the positions of the first handrail surface 100 and the second handrail surface 110 can be changed through the rotating action of the first handrail structure 10 relative to the connecting shell 3 and the rotating action of the second handrail structure 11 relative to the first handrail structure 10. At the same time, a certain included angle can be formed between the first handrail surface 100 and the second handrail surface 110. In some application scenarios, it can be more in line with the user's use demand. For example, when the user sits on the seat and uses the mobile phone to play games, the adjustable handrails on both sides can be rotated to be relatively close by rotating the first handrail structure 10 and the second handrail structure 11, so that the user can place the two small arms on the adjustable handrails on both sides and make the small arms in the chest position, which is convenient for mobile phone game operation.

[0052] Specifically, as shown in Figure 8 In the embodiment, the first handrail structure 10 includes a first bottom shell 101 forming a first cavity and a first cover plate 102 arranged on the first bottom shell 101, and the first cover plate 102 forms the first handrail surface 100. The first bottom shell 101 is provided with a first through hole 1010, the top end of the connecting shell 3 is provided with a first connecting protrusion 311 extending into the first cavity from the first through hole 1010, and the inner wall of the first bottom shell 101 forms a first tooth groove 1011 distributed around the first connecting protrusion 311. The third locking mechanism 6 includes a first connecting member 60 arranged in the first cavity, a first engaging block 61 capable of engaging with the first tooth groove 1011, and a first elastic member 62 arranged between the first engaging block 61 and the first connecting member 60. The first connecting member 60 is rotatably connected with the first bottom shell 101 and fixedly connected with the first connecting protrusion 311, and the first elastic member 62 presses the first engaging block 61 so that the first engaging block 61 has a tendency to be clamped into the first tooth groove 1011.

[0053] The first connecting protrusion 311 in the embodiment is provided with a round shaft which is rotationally matched with the first through hole 1010, and the round shaft is provided with a key groove (not shown in the figure) on the side facing the first connecting protrusion 311. The first connecting protrusion 311 is keyed with the key groove, and the first connecting protrusion 311 is locked and fixed with the first connecting member 60 by using a screw. Through the above design, the first bottom shell 101 can rotate relative to the first connecting member 60 and the connecting shell 3.

[0054] The first connecting member 60 is provided with a sliding groove structure, the first engaging block 61 is slidingly arranged in the sliding groove structure, and the first elastic member 62 is arranged in the sliding groove and press-bonded to the first engaging block 61 and the inner wall of the sliding groove at both ends. It should be noted that the engaging and matching mentioned above in the embodiment refers to the action of the first engaging block 61 being clamped into and taken out of the first tooth groove 1011 under the action of external force, and the principle is specifically described as follows: the first engaging block 61 is formed with a guide arc surface, and correspondingly, the first tooth groove 1011 has a shape matched with the first engaging block 61. When external force is transmitted to the first engaging block 61, under the interaction of the guide arc surface and the inner wall surface of the first tooth groove 1011, part of the force will act on the first elastic member 62 so that the first engaging block 61 can overcome the action of the first elastic member 62 and be taken out of the first tooth groove 1011. After the external force is removed, the first engaging block 61 can be clamped into the corresponding first tooth groove 1011 under the action of the first elastic member 62.

[0055] As shown in FIG. Figure 8 As shown in FIG. The second handrail structure 11 in the embodiment includes a second bottom shell 111 formed with a second accommodating cavity and a second cover plate 112 arranged on the second bottom shell 111, and the second cover plate 112 is formed with a second handrail surface 110. The second bottom shell 111 is provided with a second through hole 1110, the first handrail surface 100 is formed with a second connecting protrusion 1000 extending into the second accommodating cavity from the second through hole 1110, and the fourth locking mechanism 7 includes a connecting frame 70 arranged in the second accommodating cavity, a second connecting member 71 arranged in the connecting frame 70, a second engaging block 72 arranged on the second connecting member 71, and a second elastic member 73 arranged between the second engaging block 72 and the second connecting member 71. The second connecting member 71 is rotationally matched with the second bottom shell 111 and fixedly connected with the second connecting protrusion 1000, the inner circle of the connecting frame 70 is formed with second tooth grooves 700 distributed around the second connecting member 71, the second engaging block 72 is engaged and matched with the second tooth grooves 700, and the second elastic member 73 presses the second engaging block 72 so that the second engaging block 72 has a tendency to be clamped into the second tooth grooves 700.

[0056] The second connecting protrusion 1000 in the embodiment is provided with a round shaft which is rotationally matched with the second through hole 1110, and the round shaft is provided with a key groove (not shown in the figure) on the side facing the second connecting protrusion 1000, the second connecting protrusion 1000 is keyed with the key groove, and then the second connecting protrusion 1000 is locked and fixed with the second connecting member 71 by using a screw. Through the above design, the second bottom shell 111 can rotate relative to the second connecting member 71 and the first handrail structure 10.

[0057] A slide groove structure is formed on the second connecting member 71, the second engaging block 72 is slidingly arranged in the slide groove structure, and the second elastic member 73 is arranged in the slide groove and press-bonded to the inner wall of the slide groove at both ends respectively. The engaging and matching principle of the second engaging block 72 and the second tooth groove 700 is consistent with that of the first engaging block 61 and the first tooth groove 1011, and will not be described here again.

[0058] Further, the second through hole 1110 in the embodiment is a long circular hole extending along the length direction of the handrail body 1, and the second connecting protrusion 1000 is slidingly matched with the second through hole 1110. Correspondingly, the second handrail structure 11 can not only rotate relative to the second connecting member 71 through the second through hole 1110, but also slide relative to the second connecting member 71 through the second through hole 1110. Specifically, the inner wall of the second bottom shell 111 in the embodiment is formed with a coaming on both sides of the connecting frame 70, and the coaming is formed with a third tooth groove 1111 distributed along the length direction of the handrail body 1. The adjustable handrail further comprises a third engaging block 8 arranged on the connecting frame 70 and a third elastic member 9 arranged between the third engaging block 8 and the connecting frame 70. The third engaging block 8 can be engaged and matched with the third tooth groove 1111, and the third elastic member 9 pressurizes the third engaging block 8 so that the third engaging block 8 has a tendency to be clamped into the third tooth groove 1111. The engaging and matching principle of the third engaging block 8 and the third tooth groove 1111 is consistent with that of the first engaging block 61 and the first tooth groove 1011, and will not be described here again.

[0059] Among them, a slide groove structure is formed on the connecting frame 70, the third engaging block 8 is slidingly arranged in the slide groove structure, and the third elastic member 9 is arranged in the slide groove and press-bonded to the inner wall of the slide groove at both ends respectively. The first elastic member 62, the second elastic member 73 and the third elastic member 9 in the embodiment are all compression springs, and in other optional embodiments, metal elastic sheets can also be used as the first elastic member 62, the second elastic member 73 and the third elastic member 9.

[0060] The adjustable handrail provided in the embodiment can be applied to a seat. The seat comprises a seat frame, and the adjustable handrail is installed on the seat frame through the mounting plate 2.

[0061] Finally, it should be noted that: the above-mentioned embodiments are only optional embodiments of the present application, and cannot be used to limit the scope of protection of the present application, and any non-substantial changes and substitutions made by those skilled in the art on the basis of the present application all belong to the scope of protection required by the present application.

Claims

1. An adjustable armrest for a seat, comprising an armrest body and a mounting plate for mounting with a seat frame of the seat, characterised in that, The adjustable armrest further comprises a connecting shell and a first locking assembly, the armrest body is arranged at an upper end of the connecting shell, the mounting plate is provided with a connecting end, and a lower end of the connecting shell is rotationally arranged on the connecting end about a set axis extending along a width direction of the seat; The first locking assembly comprises: a first swing rod rotationally arranged in the connecting shell and formed with a first clamping portion, the first swing rod has a first position and a second position relative to the connecting shell; a first reset member arranged between the first swing rod and the connecting shell and pressing the first swing rod so that the first swing rod has a tendency to swing to the first position; and a connecting block fixedly arranged on the connecting end and formed with a plurality of clamping teeth distributed in a circumferential direction of the set axis; wherein the first clamping portion is clamped into the clamping teeth when the first swing rod is at the first position, and the first clamping portion is out of the clamping teeth when the first swing rod is at the second position.

2. The adjustable handrail of claim 1, wherein, The first swing rod is rotationally arranged in the connecting shell through a first rotation shaft, and a pressing portion and the first clamping portion are respectively formed on two sides of the first swing rod relative to the first rotation shaft, the pressing portion is used to drive the first swing rod to swing from the first position to the second position in response to an external force.

3. The adjustable handrail of claim 2, wherein, The adjustable armrest further comprises a key, the connecting shell is provided with an opening, the key is extended into the connecting shell through the opening and abuts against the pressing portion.

4. The adjustable handrail of any one of claims 1 to 3, wherein, The connecting shell comprises a connecting outer shell and a connecting inner shell, the connecting inner shell is extended into the connecting outer shell and is arranged to slide relative to the connecting outer shell in a set direction, the armrest body is arranged at a top end of the connecting inner shell, a bottom end of the connecting outer shell is rotationally connected with the connecting end, and the adjustable armrest further comprises a second locking assembly, the second locking assembly comprises: a second swing rod rotationally arranged in the connecting inner shell and formed with a second clamping portion, the second swing rod has a third position and a fourth position relative to the connecting inner shell; and a second reset member arranged between the second swing rod and the connecting inner shell and pressing the second swing rod so that the second swing rod has a tendency to swing to the third position; wherein the connecting outer shell is provided with a plurality of clamping grooves distributed in the set direction, the second clamping portion is clamped into the clamping grooves when the second swing rod is at the third position, and the second clamping portion is out of the clamping grooves when the second swing rod is at the fourth position.

5. The adjustable handrail of claim 4, wherein, The second swing rod is rotationally arranged in the connecting inner shell through a second rotation shaft, and a pulling portion and the second clamping portion are respectively formed on two sides of the second swing rod relative to the second rotation shaft, and the pulling portion is extended to the outside from the connecting inner shell.

6. The adjustable handrail of claim 4, wherein, The first swing rod is arranged outside the connecting inner shell and rotationally arranged on an inner wall of the connecting outer shell, and the connecting shell further comprises a partition plate, the partition plate is fixedly arranged in the connecting outer shell and separates the first swing rod from the connecting inner shell.

7. The adjustable handrail of claim 6, wherein, The partition plate and the inner wall of the connecting outer shell are both provided with a limiting sliding groove extending in the set direction, the connecting inner shell is provided with a limiting protruding portion matched with the limiting sliding groove, and the limiting protruding portion is extended into the limiting sliding groove and is slidingly matched.

8. The adjustable handrail of claim 4, wherein, The connecting shell comprises a first shell and a second shell arranged in the first shell, the connecting inner shell is slidingly arranged in the second shell, the clamping slot is formed on the second shell, the bottom end of the first shell is formed with an adapter end, and the adapter end is rotationally arranged on the connecting end.

9. The adjustable handrail of claim 8, wherein, The connecting end comprises a first arc-shaped slot formed on one end of the mounting plate, and a first circular plate and a second circular plate formed in the first arc-shaped slot, the first circular plate and the second circular plate are arranged in a spaced manner, and the connecting block is fixedly installed between the first circular plate and the second circular plate. The adapter end comprises a second arc-shaped slot formed on the bottom end of the first shell, and a third circular plate and a fourth circular plate formed on both sides of the second arc-shaped slot. The third circular plate and the fourth circular plate are clamped on both sides of the first circular plate and the second circular plate, and the third circular plate and the fourth circular plate are rotationally arranged in the first arc-shaped slot, and the first circular plate and the second circular plate are rotationally arranged in the second arc-shaped slot.

10. The adjustable handrail of any one of claims 1 to 3, wherein, The handrail body comprises a first handrail structure with a first handrail surface and a second handrail structure with a second handrail surface, the second handrail surface is larger than the first handrail surface, the first handrail structure is rotationally arranged on the top end of the connecting shell, and the second handrail structure is rotationally arranged on the top end of the first handrail structure. The adjustable handrail further comprises a third locking mechanism for locking the first handrail structure with the connecting shell, and a fourth locking mechanism for locking the second handrail structure with the first handrail structure.

11. The adjustable handrail of claim 10, wherein, The first handrail structure comprises a first bottom shell formed with a first cavity and a first cover plate arranged on the first bottom shell, and the first cover plate is formed with the first handrail surface; The first bottom shell is provided with a first through hole, the top end of the connecting shell is provided with a first connecting protrusion extending into the first cavity through the first through hole, the inner wall of the first bottom shell is formed with a first tooth groove distributed around the first connecting protrusion, the third locking mechanism comprises a first connecting member arranged in the first cavity, a first engaging block capable of engaging with the first tooth groove, and a first elastic member arranged between the first engaging block and the first connecting member; The first connecting member is rotationally matched with the first bottom shell and fixedly connected with the first connecting protrusion, and the first elastic member presses the first engaging block so that the first engaging block has a tendency to be clamped into the first tooth groove.

12. The adjustable handrail of claim 10, wherein, The second handrail structure comprises a second bottom shell formed with a second cavity and a second cover plate arranged on the second bottom shell, and the second cover plate is formed with the second handrail surface; The second bottom shell is provided with a second through hole, the first handrail surface is formed with a second connecting protrusion extending into the second cavity through the second through hole, the fourth locking mechanism comprises a connecting frame arranged in the second cavity, a second connecting member arranged in the connecting frame, a second engaging block arranged on the second connecting member, and a second elastic member arranged between the second engaging block and the second connecting member; The second connecting member is rotationally connected with the second bottom shell and fixedly connected with the second connecting block. The inner ring of the connecting frame is formed with second tooth grooves distributed around the second connecting member. The second engaging block is engaged with the second tooth grooves. The second elastic member exerts pressure on the second engaging block so that the second engaging block has a tendency to be clamped into the second tooth grooves.

13. The adjustable handrail of claim 12, wherein, The second through hole is an elongated circular hole extending along the length direction of the handrail body. The second connecting block is slidingly connected with the second through hole. The inner wall of the second bottom shell is formed with a baffle on both sides of the connecting frame. The inner ring of the baffle is formed with third tooth grooves distributed along the length direction of the handrail body. The adjustable handrail further comprises a third engaging block arranged on the connecting frame and a third elastic member arranged between the third engaging block and the connecting frame. The third engaging block is engaged with the third tooth grooves. The third elastic member exerts pressure on the third engaging block so that the third engaging block has a tendency to be clamped into the third tooth grooves.

14. A seat comprising a seat frame, characterized by The seat further comprises the adjustable handrail as claimed in any one of claims 1 to 13, which is mounted on the seat frame through the mounting plate.

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