Seat armrest and seat

Abstract

The utility model discloses a seat armrest and a seat, and belongs to the technical field of seats, an 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 a seat armrest and seat. BACKGROUND

[0002] The armrest of the seat can provide support for the arm of the user, which can reduce the fatigue of the user's arm. With the increasing richness of the functions of the seat, the sitting posture of the user on the seat changes more and more, and the functional requirements for the armrest are also more and more. For example, in the related art, the armrest is designed to be capable of lifting and swinging. However, in some seat use scenarios, the current armrest cannot meet the use requirements of the user. For example, when the user wants to lean on the seat, the user generally supports the elbow on the support surface of the armrest, at which time the user's arm cannot be supported. For another example, when the user is resting, the user may lean back on the backrest and use the mobile phone with both hands, and since the user's arm is lifted, the armrest cannot support the user's arm at this time. SUMMARY

[0003] The utility model aims at providing a seat armrest and seat, which can bend and adjust the armrest surface to support the arm and elbow of the user at the same time, and meet the use requirements of the user in some scenarios.

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

[0005] The seat armrest comprises an armrest body and a mounting structure for mounting with a seat frame of a seat, the mounting structure is formed with a mounting surface, and the armrest body comprises:

[0006] A first connecting shell is mounted on the mounting surface and is formed with a first armrest surface;

[0007] A second connecting shell is rotatably arranged on the first connecting shell about a predetermined axis and is formed with a second armrest surface; and

[0008] A first locking assembly is arranged between the first connecting shell and the second connecting shell and has a locked state and an unlocked state;

[0009] The first locking assembly locks the first connecting shell relative to the second connecting shell in the locked state, and the first locking assembly allows the first connecting shell to rotate relative to the second connecting shell to adjust the included angle between the first armrest surface and the second armrest surface in the unlocked state.

[0010] Preferably, the first locking assembly comprises:

[0011] A fixed block is fixed to the first connecting shell and is formed with a plurality of clamping teeth distributed circumferentially along the predetermined axis;

[0012] a locking member movably arranged on the second connecting shell and formed with engagement teeth engaging with the clamping teeth, the engagement teeth clamping into the clamping teeth when the first locking assembly is in the locked state and disengaging from the clamping teeth when the first locking assembly is in the unlocked state; and

[0013] a first elastic member acting on the locking member to make the engagement teeth have a tendency to clamp into the clamping teeth;

[0014] wherein the locking member is configured to be able to act in response to an external force and disengage from the clamping teeth.

[0015] Preferably, the first locking assembly further comprises a transmission mechanism arranged in the second connecting shell, the transmission mechanism comprising a button and a push-pull rod, the button being rotatably arranged on the second connecting shell and swinging relative to the second connecting shell between a first position and a second position, one end of the push-pull rod being movably hinged to the button, and the other end of the push-pull rod being movably hinged to the locking member.

[0016] the button, in the process of swinging from the first position to the second position, pulls the locking member through the push-pull rod to act and make the engagement teeth disengage from the clamping teeth, and the button, in the process of swinging from the second position to the first position, pushes the locking member through the push-pull rod to act and make the engagement teeth clamp into the clamping teeth;

[0017] the first elastic member is arranged between the second connecting shell and the button and presses the button to make the button have a tendency to swing to the first position.

[0018] Preferably, the seat armrest further comprises a limiting shell arranged in the second connecting shell, the limiting shell forming a limiting channel, and the locking member is slidably arranged in the limiting channel.

[0019] Preferably, one of the first connecting shell and the second connecting shell is formed with an arc-shaped groove, and the other is formed with an arc-shaped protrusion matched with the arc-shaped groove, the arc-shaped protrusion and the arc-shaped groove being rotatably matched to make the gap between the first armrest surface and the second armrest surface smaller than a set distance when the first armrest surface and the second armrest surface are parallel.

[0020] Preferably, the mounting structure comprises:

[0021] a mounting plate for mounting with a seat frame of a seat;

[0022] a first connecting arm arranged on the mounting plate;

[0023] a second connecting arm slidably arranged relative to the first connecting arm along a set direction; and

[0024] a second locking assembly arranged between the first connecting arm and the second connecting arm and having a first state and a second state.

[0025] The second locking assembly locks the first connecting arm relative to the second connecting arm in the first state, and allows the second connecting arm to slide relative to the first connecting arm in the second state.

[0026] Preferably, the top end of the second connecting arm is formed with a first protrusion, and the mounting structure further comprises:

[0027] an intermediate shell comprising a first bottom shell formed with a first accommodating cavity and a first cover plate arranged on the first bottom shell, the first bottom shell being formed with a first through hole and a surrounding barrier at the bottom wall thereof, the inner wall of the surrounding barrier being formed with a first tooth groove distributed in a circumferential direction, and the first connecting shell being arranged on the first cover plate;

[0028] a connecting block arranged in the surrounding barrier and formed with a first circular shaft rotationally fitted with the first through hole, the first circular shaft being provided with a first key groove, and the first protrusion being key-fitted with the first key groove;

[0029] a first clamping block arranged on the connecting block and capable of being engaged with the first tooth groove; and

[0030] a second elastic member arranged between the connecting block and the first clamping block and pressing the first clamping block so as to make the first clamping block have a tendency to be clamped into the first tooth groove.

[0031] Preferably, the top end of the first cover plate forms the mounting surface, the mounting surface is formed with a second through hole, the bottom of the first connecting shell is provided with a second protrusion, and the seat armrest further comprises:

[0032] a connecting frame arranged in the intermediate shell, and the connecting frame being formed with a second tooth groove distributed in a circumferential direction;

[0033] a positioning disc rotationally arranged in the connecting frame and formed with a second circular shaft rotationally fitted with the second through hole, the second circular shaft being provided with a second key groove, and the second protrusion being key-fitted with the second key groove;

[0034] a second clamping block arranged on the positioning disc and capable of being engaged with the second tooth groove; and

[0035] a third elastic member arranged between the positioning disc and the second clamping block and pressing the second clamping block so as to make the second clamping block have a tendency to be clamped into the second tooth groove.

[0036] Preferably, the side wall of the intermediate shell is provided with a third tooth groove distributed along the length direction thereof, the connecting frame is slidingly arranged in the intermediate shell along the length direction of the first connecting shell, and the second through hole is a long hole capable of slidingly and rotatably matching the second protrusion.

[0037] The seat armrest further comprises a third clamping block arranged on the connecting frame and a fourth elastic member arranged between the connecting frame and the third clamping block, the third clamping block is capable of being engaged with the third tooth groove, and the fourth elastic member exerts pressure on the third clamping block so that the third clamping block has a tendency to be clamped into the third tooth groove.

[0038] In addition, to achieve the above-mentioned purpose, the utility model also adopts the following technical scheme:

[0039] The seat comprises a seat frame, and further comprises the seat armrest according to any one of the above technical schemes, wherein the seat armrest is installed on the seat frame through the mounting structure.

[0040] Compared with the prior art, the utility model has the beneficial effects that:

[0041] The armrest body is designed as two parts of the first connecting shell and the second connecting shell, the armrest surface of the armrest body is designed as two parts of the first armrest surface and the second armrest surface, and the second connecting shell is rotatably connected relative to the first connecting shell, so that the included angle between the first armrest surface and the second armrest surface can be adjusted through the rotation of the second connecting shell relative to the first connecting shell, and the first connecting shell can be locked relative to the second connecting shell through the first locking assembly, so that the included angle between the first armrest surface and the second armrest surface is maintained at a required angle. In some use scenarios, the first armrest surface and the second armrest surface at a certain angle can support the elbows and arms of the user respectively, and the use demand of the user is met. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 A structural schematic view of a seat armrest provided by the embodiment of the application when the first armrest surface and the second armrest surface are kept horizontal;

[0043] Figure 2 A structural schematic view of the seat armrest when the first armrest surface and the second armrest surface intersect;

[0044] Figure 3 An exploded view of the armrest body;

[0045] Figure 4 An exploded view of the first connecting arm, the second connecting arm and the second locking assembly;

[0046] Figure 5 An exploded view of the second connecting arm and the intermediate shell;

[0047] Figure 6 is an exploded view of the intermediate shell and the first connecting shell;

[0048] Figure 7 is another perspective view of the exploded view in Figure 6 .

[0049] Wherein, 1, the first connecting shell; 10, the first lower shell; 100, the second protruding block; 11, the first upper shell; 110, the second handrail surface; 111, the arc-shaped groove; 12, the positioning disc; 120, the second circular shaft; 13, the second clamping block; 14, the third elastic member; 2, the second connecting shell; 20, the second lower shell; 21, the second upper shell; 210, the second handrail surface; 22, the limiting shell; 220, the limiting channel; 23, the arc-shaped protruding block; 3, the first locking assembly; 30, the fixed block; 300, the clamping tooth; 31, the locking member; 310, the meshing tooth; 32, the first elastic member; 33, the button; 34, the push-pull rod; 4, the mounting plate; 5, the first connecting arm; 50, the bayonet; 6, the second connecting arm; 60, the first protruding block; 7, the second locking assembly; 70, the swing lever; 700, the pulling part; 701, the clamping part; 71, the rotating shaft; 72, the reset member; 8, the intermediate shell; 80, the first bottom shell; 800, the first perforation; 801, the first tooth groove; 802, the third tooth groove; 81, the first cover plate; 810, the mounting surface; 811, the second perforation; 82, the connecting block; 820, the first circular shaft; 83, the first clamping block; 830, the meshing part; 84, the second elastic member; 85, the connecting frame; 850, the second tooth groove; 86, the third clamping block; 87, the fourth elastic member. DETAILED DESCRIPTION

[0050] The utility model will be further described below in combination with the drawings and specific embodiments, it is to be 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 functions 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.

[0051] In the description of this application, it should be understood that the terms "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting this application. In the description of this application, "plurality" means two or more, unless otherwise specifically specified.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "connected," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, a connection through an intermediary medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0053] This embodiment provides a chair armrest, such as Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown in , the chair armrest includes an armrest body and a mounting structure for mounting with the seat frame of the chair, the mounting structure forming a mounting surface 810, and the armrest body including a first connecting shell 1, a second connecting shell 2, and a first locking assembly 3. The first connecting shell 1 is mounted on the mounting surface 810 and forms a first armrest surface 110, the second connecting shell 2 is rotatably mounted on the first connecting shell 1 around a set axis and forms a second armrest surface 210, and the first locking assembly 3 is disposed between the first connecting shell 1 and the second connecting shell 2 and has a locked state and an unlocked state. The set axis extends along the width direction of the chair, and the second connecting shell 2 rotates relative to the first connecting shell 1 around the set axis to change the angle between the second armrest surface 210 and the first armrest surface 110.

[0054] The first locking assembly 3 in this embodiment has the following functions: the first locking assembly 3 locks the first connecting shell 1 relative to the second connecting shell 2 in the locked state, and the first locking assembly 3 allows the first connecting shell 1 to rotate relative to the second connecting shell 2 in the unlocked state to adjust the angle between the first armrest surface 110 and the second armrest surface 210.

[0055] The seat armrest provided by the embodiment is designed as two parts of a first connecting shell 1 and a second connecting shell 2, and the armrest surface of the armrest body is designed as two parts of a first armrest surface 110 and a second armrest surface 210. The second connecting shell 2 is rotationally connected to the first connecting shell 1, so that the included angle between the first armrest surface 110 and the second armrest surface 210 can be adjusted by rotating the second connecting shell 2 relative to the first connecting shell 1, and the first connecting shell 1 can be locked relative to the second connecting shell 2 by the first locking assembly 3, so that the included angle between the first armrest surface 110 and the second armrest surface 210 is maintained at a desired angle. In some use scenarios, the first armrest surface 110 and the second armrest surface 210 at a certain angle can support the elbows and arms of the user, respectively, to meet the user's use requirements.

[0056] In the embodiment, the first locking assembly 3 includes a fixed block 30, a locking piece 31, and a first elastic piece 32. Figure 3 As shown in FIG. 1, the first locking assembly 3 includes a fixed block 30, a locking piece 31, and a first elastic piece 32. The fixed block 30 is fixed to the first connecting shell 1, and the fixed block 30 is formed with a plurality of clamping teeth 300 distributed circumferentially along a specified axis. The first connecting shell 1 in the embodiment includes a first lower shell 10 and a first upper shell 11, and the first upper shell 11 is buckled on the first lower shell 10 to form an internal space of the first connecting shell 1. The fixed block 30 is fixedly arranged on the bottom wall of the first lower shell 10. The locking piece 31 is movably arranged on the second connecting shell 2 and is formed with engagement teeth 310 engaged with the clamping teeth 300. The engagement teeth 310 are engaged into the clamping teeth 300 when the first locking assembly 3 is in a locked state and are disengaged from the clamping teeth 300 when the first locking assembly 3 is in an unlocked state. The locking piece 31 is configured to be actuated and disengaged from the clamping teeth 300 in response to an external force, and the first elastic piece 32 acts on the locking piece 31 to make the engagement teeth 310 have a tendency to engage into the clamping teeth 300. Thus, the engagement teeth 310 can be switched between the states of engaging into the clamping teeth 300 and disengaging from the clamping teeth 300 by the cooperation of the button 33 and the first elastic piece 32, and the first locking assembly 3 can be switched between the locked state and the unlocked state.

[0057] Further, the first locking assembly 3 in the embodiment further comprises a transmission mechanism arranged in the second connecting shell 2, the transmission mechanism comprises a button 33 and a push-pull rod 34, the button 33 is rotationally arranged on the second connecting shell 2 and swings between a first position and a second position relative to the second connecting shell 2, one end of the push-pull rod 34 is movably hinged with the button 33, and the other end of the push-pull rod 34 is movably hinged with the locking piece 31. In the process of swinging from the first position to the second position, the button 33 pulls the locking piece 31 to act through the push-pull rod 34 and makes the meshing teeth 310 disengage from the clamping teeth 300, and in the process of swinging from the second position to the first position, the button 33 pushes the locking piece 31 to act through the push-pull rod 34 and makes the meshing teeth 310 engage in the clamping teeth 300. In use, the user presses the button 33 to make the button 33 swing against the action of the first elastic piece 32, since one end of the push-pull rod 34 is movably hinged with the button 33, the push-pull rod 34 is driven to act, at the same time, the push-pull rod 34 drives the locking piece 31 to act relative to the fixed block 30, so that the meshing teeth 310 disengage from the clamping teeth 300. After the user removes the force on the button 33, the button 33 is reset under the action of the first elastic piece 32, correspondingly, the push-pull rod 34 returns to the original position under the reset swing action of the button 33, and drives the locking piece 31 to act relative to the fixed block 30, so that the meshing teeth 310 engage in the clamping teeth 300.

[0058] The first elastic piece 32 in the embodiment is arranged between the second connecting shell 2 and the button 33 and presses the button 33 to have a tendency to swing to the first position. Specifically, the first elastic piece 32 in the embodiment is a torsion spring.

[0059] As shown in FIG. Figure 3 In the embodiment, the second connecting shell 2 is designed to include a second lower shell 20 and a second upper shell 21, the second upper shell 21 is buckled on the second lower shell 20, and the two enclose an internal space of the second connecting shell 2. The push-pull rod 34, the first elastic piece 32 and the button 33 are all arranged in the second connecting shell 2, and an opening is arranged on the second lower shell 20 for the button 33 to extend out of the second connecting shell 2 to the outside, so as to facilitate the user to press the button 33 from the outside.

[0060] In order to make the meshing teeth 310 more easily engage in the clamping teeth 300, the action stroke of the locking piece 31 is limited in the embodiment, specifically, the seat armrest provided in the embodiment further comprises a limiting shell 22 arranged in the second connecting shell 2, the limiting shell 22 forms a limiting channel 220, and the locking piece 31 is slidingly arranged in the limiting channel 220.

[0061] As mentioned above, in some specific application scenarios, the user desires that the first handrail surface 110 and the second handrail surface 210 have a certain angle, but in more common application scenarios, the user still desires that the first handrail surface 110 and the second handrail surface 210 are parallel to each other. To this end, the second connecting shell 2 in the embodiment can be rotated relative to the first connecting shell 1 to make the first handrail surface 110 and the second handrail surface 210 be in the same plane, so as to meet the general needs of the user. Further, in combination with the description in Figure 1 and Figure 2 , one of the one end of the first connecting shell 1 and the one end of the second connecting shell 2 is formed with an arc-shaped slot 111, and the other is formed with an arc-shaped protrusion 23 matched with the arc-shaped slot 111. The arc-shaped protrusion 23 and the arc-shaped slot 111 are rotationally matched to make the gap between the first handrail surface 110 and the second handrail surface 210 be less than a set distance when the first handrail surface 110 and the second handrail surface 210 are parallel. The set distance is a selected value less than 2 mm. This setting can reduce the gap between the first handrail surface 110 and the second handrail surface 210, and can better support the user's arm.

[0062] In the embodiment, the arc-shaped slot 111 is arranged on the first connecting shell 1, and correspondingly, the arc-shaped protrusion 23 is arranged on the second connecting shell 2. It is easy to understand that in other alternative embodiments, the arc-shaped slot 111 can also be arranged on the second connecting shell 2, and correspondingly, the arc-shaped protrusion 23 is arranged on the first connecting shell 1.

[0063] Further, the seat armrest provided by the embodiment also has the function of height adjustment. In combination with the description in Figure 4 , the mounting structure includes a mounting plate 4, a first connecting arm 5, a second connecting arm 6, and a second locking assembly 7. The mounting plate 4 is used to be mounted with the seat frame of the seat. The first connecting arm 5 is arranged on the mounting plate 4, and in the embodiment, the first connecting arm 5 is fixedly mounted on the mounting plate 4. The second connecting arm 6 is arranged in a sliding manner relative to the first connecting arm 5 along a set direction, and the armrest body is arranged at the top end of the second connecting arm 6. The set direction is the height direction of the seat, so when the second connecting arm 6 slides relative to the first connecting arm 5, the armrest body will change its position along the height direction relative to the seat frame.

[0064] The second locking assembly 7 is arranged between the first connecting arm 5 and the second connecting arm 6 and has a first state and a second state, the second locking assembly 7 locks the first connecting arm 5 relative to the second connecting arm 6 in the first state, and the second locking assembly 7 allows the second connecting arm 6 to slide relative to the first connecting arm 5 in the second state. That is, when the height position of the handrail body needs to be adjusted, the second locking assembly 7 is first switched to the second state, then the second connecting arm 6 is slid relative to the first connecting arm 5 until the handrail body moves to the target height, and then the second locking assembly 7 is switched to the first state to lock the first connecting arm 5 and the second connecting arm 6.

[0065] Specifically, the second locking assembly 7 in the embodiment includes a swing rod 70 and a reset member 72. The second connecting arm 6 is formed with a sliding cavity, and the second connecting arm 6 is slidably sleeved outside the first connecting arm 5 through the sliding cavity inside the second connecting arm 6. An internal space is formed in the first connecting arm 5, and the swing rod 70 is arranged in the internal space of the first connecting arm 5. The swing rod 70 is provided with a rotating shaft 71, both ends of the rotating shaft 71 are arranged outside the internal space of the first connecting arm 5 and are rotatably connected to the inner wall of the sliding cavity. Thus, the swing rod 70 is rotatably arranged in the second connecting arm 6 through the rotating shaft 71. One end of the swing rod 70 is formed with a pulling portion 700 extending to the outside of the second connecting arm 6, and the other end of the swing rod 70 is formed with a clamping portion 701. A plurality of clamping holes 50 distributed along the height direction are arranged on the first connecting arm 5. When the clamping portion 701 is clamped into the clamping hole 50, the first connecting arm 5 and the second connecting arm 6 are locked. When the user presses the pulling portion 700 from the outside, the swing rod 70 will swing to make the clamping portion 701 come out of the clamping hole 50. The reset member 72 is arranged between the pulling portion 700 and the second connecting arm 6 and presses the pulling portion 700 so that the clamping portion 701 has a tendency to be clamped into the clamping hole 50. Specifically, the reset member 72 is a compression spring, one end of the compression spring is pressed to the pulling portion 700, and the other end of the compression spring is pressed to the top inner wall of the sliding cavity.

[0066] Further, the seat armrest provided by the embodiment can also adjust the handrail body relative to the second connecting arm 6 in the plane rotation and the front and back movement. As shown in FIG. 6, the second connecting arm 6 is provided with a plurality of clamping holes 60 distributed along the height direction, and the first connecting arm 5 is provided with a plurality of clamping holes 50 distributed along the height direction. When the clamping portion 701 of the swing rod 70 is clamped into the clamping hole 60, the second connecting arm 6 is locked relative to the first connecting arm 5. When the clamping portion 701 of the swing rod 70 is clamped into the clamping hole 50, the second connecting arm 6 is locked relative to the first connecting arm 5. Thus, the seat armrest can adjust the handrail body relative to the second connecting arm 6 in the plane rotation and the front and back movement. Figure 5As shown in FIG. 1, the top end of the second connecting arm 6 in the embodiment forms a first protrusion 60, and the mounting structure further comprises an intermediate shell 8, a connecting block 82, a first clamping block 83 and a second elastic member 84. The intermediate shell 8 comprises a first bottom shell 80 forming a first cavity and a first cover plate 81 arranged on the first bottom shell 80, the first bottom shell 80 forms a first through hole 800 and a surrounding barrier on the bottom wall, the surrounding barrier is annular, the inner wall of the surrounding barrier forms a plurality of first tooth grooves 801 distributed in the circumferential direction, and the first connecting shell 1 is arranged on the first cover plate 81. The connecting block 82 is arranged in the surrounding barrier and forms a first circular shaft 820 rotationally matched with the first through hole 800, the first circular shaft 820 is provided with a first key groove, and the first protrusion 60 is keyed with the first key groove. The first clamping block 83 is arranged on the connecting block 82 and can be engaged with the first tooth grooves 801, and the second elastic member 84 is arranged between the connecting block 82 and the first clamping block 83 and presses the first clamping block 83 so that the first clamping block 83 has a tendency to be clamped into the first tooth grooves 801. It should be noted that the above-mentioned engagement in the embodiment refers to the action of the first clamping block 83 clamped into and out of the first tooth grooves 801 under external action, and the principle is specifically described as follows: Figure 5 As shown in FIG. 1, the first clamping block 83 is provided with an engagement part 830 for engaging with the first tooth grooves 801, and the engagement part 830 is provided with a guide arc surface, and correspondingly, the first tooth grooves 801 have a shape matched with the engagement part 830. When external force is transmitted to the first clamping block 83, part of the force will act on the second elastic member 84 under the interaction of the guide arc surface of the engagement part 830 and the inner wall surface of the first tooth grooves 801, so that the first clamping block 83 can overcome the action of the second elastic member 84 and be out of the first tooth grooves 801. After the external force is removed, the first clamping block 83 can be clamped into the corresponding first tooth grooves 801 under the action of the second elastic member 84.

[0067] Through the above structure design, the intermediate shell 8 and the handrail body arranged on the intermediate shell 8 can be kept stable relative to the second connecting arm 6 by clamping the first clamping block 83 into the first tooth grooves 801. When it is needed to rotate the intermediate shell 8 relative to the second connecting arm 6, the user can press the intermediate shell 8 or the handrail body, so that the first clamping block 83 can overcome the action of the second elastic member 84 and be out of one first tooth groove 801, and after the intermediate shell 8 is rotated relative to the second connecting arm 6, the first clamping block 83 can be clamped into the next adjacent first tooth groove 801 under the action of the second elastic member 84. Repeating the above process can rotate the handrail body and the intermediate shell 8 to the desired position.

[0068] As shown in FIG. 1, Figure 6 and Figure 7As shown in , the armrest body in this embodiment can also rotate horizontally and move forward and backward relative to the intermediate shell 8. Specifically, in this embodiment, the mounting surface 810 is formed at the top of the first cover plate 81, and the mounting surface 810 is formed with a second through-hole 811. A second protrusion 100 is provided at the bottom of the first connecting shell 1. The seat armrest also includes a connecting frame 85, a positioning plate 12, a second clamping block 13, and a third elastic member 14. The connecting frame 85 is disposed within the intermediate shell 8 and has circumferentially distributed second tooth grooves 850 formed therein. The positioning plate 12 is rotatably disposed within the connecting frame 85 and has a second circular shaft 120 formed therein that rotatably engages with the second through-hole 811. The second circular shaft 120 is provided with a second keyway, and the second protrusion 100 is keyed to the second keyway. The second clamping block 13 is disposed on the positioning plate 12 and can mesh with the second tooth groove 850. The third elastic member 14 is disposed between the positioning plate 12 and the second clamping block 13 and applies pressure to the second clamping block 13 so that the second clamping block 13 tends to be clamped into the second tooth groove 850 .

[0069] Through the above structural design, the user can apply a certain force to the first connecting shell 1 to enable the first connecting shell 1 to drive the positioning plate 12 to rotate relative to the intermediate shell 8 (and the connecting frame 85).

[0070] Further, such as Figure 6 and Figure 7 As shown in , in this embodiment, the sidewall of the intermediate housing 8 is provided with third tooth grooves 802 distributed along its length. The connecting frame 85 is slidably disposed within the intermediate housing 8 along the length of the first connecting housing 1. The second through-hole 811 is an elongated hole capable of sliding and rotating with the second protrusion 100. The armrest also includes a third clamping block 86 disposed on the connecting frame 85 and a fourth elastic member 87 disposed between the connecting frame 85 and the third clamping block 86. The fourth elastic member 87 applies pressure to the third clamping block 86, causing it to engage with the third tooth groove 802.

[0071] Through the above structural design, the user can apply a certain force to the first connecting shell 1 to enable the first connecting shell 1 to drive the positioning plate 12 and the connecting frame 85 to move relative to the intermediate shell 8.

[0072] It is easy to understand that the meshing cooperation between the second clamping block 13 and the second tooth groove 850 and the meshing cooperation between the third clamping block 86 and the third tooth groove 802 are consistent with the meshing cooperation principle between the first clamping block 83 and the first tooth groove 801, and will not be repeated here.

[0073] It should be noted that the second elastic member 84, the third elastic member 14 and the fourth elastic member 87 in this embodiment are all compression springs. Accordingly, mounting grooves for mounting compression springs are provided on the connecting block 82, the positioning plate 12 and the connecting frame 85. Figure 7As shown in the middle, taking the fourth elastic member 87 as an example, a mounting groove matched with the fourth elastic member 87 is arranged on the connecting frame 85, the fourth elastic member 87 is arranged in the mounting groove, one end of the fourth elastic member 87 is crimped to the third clamping block 86, and the other end of the fourth elastic member 87 is crimped to the inner wall of the mounting groove.

[0074] The seat armrest provided by the embodiment can be applied to a seat, and the seat comprises a seat frame.

[0075] 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. Any non-substantial changes and replacements made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A seat arm characterized in that, The armrest includes an armrest body and a mounting structure for mounting with a seat frame of a seat, the mounting structure is formed with a mounting surface, the armrest body includes: a first connecting shell mounted on the mounting surface and formed with a first armrest surface; a second connecting shell rotatably arranged on the first connecting shell about a set axis and formed with a second armrest surface; and a first locking assembly arranged between the first connecting shell and the second connecting shell and having a locked state and an unlocked state; wherein the first locking assembly locks the first connecting shell relative to the second connecting shell in the locked state, and allows the first connecting shell to rotate relative to the second connecting shell to adjust the included angle between the first armrest surface and the second armrest surface in the unlocked state.

2. The armrest of claim 1, wherein The first locking assembly includes: a fixed block fixed to the first connecting shell and formed with a plurality of clamping teeth distributed circumferentially along the set axis; a locking member movably arranged on the second connecting shell and formed with engagement teeth engaged with the clamping teeth, the engagement teeth being clamped into the clamping teeth when the first locking assembly is in the locked state and being disengaged from the clamping teeth when the first locking assembly is in the unlocked state; and a first elastic member acting on the locking member so that the engagement teeth have a tendency to clamp into the clamping teeth; wherein the locking member is configured to be able to act in response to an external force and disengage from the clamping teeth.

3. The armrest of claim 2, wherein The first locking assembly further includes a transmission mechanism arranged in the second connecting shell, the transmission mechanism includes a button and a push-pull rod, the button is rotatably arranged on the second connecting shell and swings relative to the second connecting shell between a first position and a second position, one end of the push-pull rod is movably hinged with the button, and the other end of the push-pull rod is movably hinged with the locking member; the button pulls the locking member to act and disengage the engagement teeth from the clamping teeth through the push-pull rod in the process of swinging from the first position to the second position, and the button pushes the locking member to act and clamps the engagement teeth into the clamping teeth through the push-pull rod in the process of swinging from the second position to the first position; the first elastic member is arranged between the second connecting shell and the button and presses the button to have a tendency to swing to the first position.

4. The armrest of claim 3, wherein The seat armrest further includes a limiting shell arranged in the second connecting shell, the limiting shell is formed with a limiting channel, and the locking member is movably arranged in the limiting channel.

5. The armrest of any one of claims 1 to 4, wherein, One of the first connecting shell and the second connecting shell is formed with an arc-shaped groove, and the other is formed with an arc-shaped protrusion matched with the arc-shaped groove, the arc-shaped protrusion and the arc-shaped groove are rotatably matched to make the gap between the first armrest surface and the second armrest surface smaller than a set distance when the first armrest surface and the second armrest surface are parallel.

6. The armrest of any one of claims 1 to 4, wherein, The mounting structure includes: a mounting plate for mounting with a seat frame of a seat; a first connecting arm arranged on the mounting plate; a second connecting arm slidably arranged relative to the first connecting arm in a set direction; and a second locking assembly arranged between the first connecting arm and the second connecting arm and having a first state and a second state; The second locking assembly locks the first connecting arm relative to the second connecting arm in a first state, and allows the second connecting arm to slide relative to the first connecting arm in a second state.

7. The armrest of claim 6, wherein The top end of the second connecting arm is formed with a first protrusion, and the mounting structure further comprises: an intermediate shell comprising a first bottom shell formed with a first cavity and a first cover plate arranged on the first bottom shell, the first bottom shell being formed with a first through hole and a surrounding barrier at the bottom wall thereof, the inner wall of the barrier being formed with a first tooth groove distributed in a circumferential direction, the first connecting shell being arranged on the first cover plate; a connecting block arranged in the barrier and formed with a first circular shaft rotationally fitted with the first through hole, the first circular shaft being provided with a first key groove, the first protrusion being key-fitted with the first key groove; a first clamping block arranged on the connecting block and capable of being engaged with the first tooth groove; and a second elastic member arranged between the connecting block and the first clamping block and pressing the first clamping block so that the first clamping block has a tendency to be clamped into the first tooth groove.

8. The armrest of claim 7, wherein The top end of the first cover plate forms the mounting surface, the mounting surface being formed with a second through hole, the bottom of the first connecting shell being provided with a second protrusion, and the seat armrest further comprises: a connecting frame arranged in the intermediate shell, and the connecting frame being formed with a second tooth groove distributed in a circumferential direction; a positioning disc rotationally arranged in the connecting frame and formed with a second circular shaft rotationally fitted with the second through hole, the second circular shaft being provided with a second key groove, the second protrusion being key-fitted with the second key groove; a second clamping block arranged on the positioning disc and capable of being engaged with the second tooth groove; and a third elastic member arranged between the positioning disc and the second clamping block and pressing the second clamping block so that the second clamping block has a tendency to be clamped into the second tooth groove.

9. The armrest of claim 8, wherein The side wall of the intermediate shell is provided with a third tooth groove distributed along the length direction thereof, the connecting frame is slidingly arranged in the intermediate shell along the length direction of the first connecting shell, and the second through hole is a long hole capable of being slidingly and rotationally fitted with the second protrusion; The seat armrest further comprises a third clamping block arranged on the connecting frame and a fourth elastic member arranged between the connecting frame and the third clamping block, the third clamping block being capable of being engaged with the third tooth groove, and the fourth elastic member pressing the third clamping block so that the third clamping block has a tendency to be clamped into the third tooth groove.

10. A seat comprising a seat frame, characterized by The seat further comprises the seat armrest according to any one of claims 1 to 9, the seat armrest being mounted on the seat frame through the mounting structure.

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