Seat armrest and seat

Abstract

The seat armrest comprises a vertical rod main body, a connecting piece, an armrest main body and a swing arm mechanism, the armrest main body is connected with the front end of the connecting piece in a rotating mode so that the armrest main body can rotate on the horizontal plane, the rear end of the connecting piece is connected with the vertical rod main body, and the swing arm mechanism is connected with the vertical rod main body. The swing arm mechanism is used for connecting the connecting piece and the vertical rod body and allowing the connecting piece to swing up and down, the armrest body cannot be actively switched between the adjusting state and the free state through switching between the first clamping groove and the second clamping groove in the swing arm mechanism, and the stability of the seat armrest in the using process is improved.

Description

Technical Field

[0001] The utility model relates to the field of office chairs, in particular to a seat armrest and a seat. Background Art

[0002] In order to adapt to the body shape and habits of users, etc., there are seat armrests on the market that can adjust the angle, length, and height of the armrests. For example, the utility model with the application number 202320115381.2 discloses an armrest for multi-angle adjustment and positioning to support the position of the arm, which relates to the technical field of office chair technology and realizes multi-angle adjustment of the office chair armrest. It includes an armrest support body, an armrest connecting piece, and an armrest vertical rod; between the front end of the armrest connecting piece and the bottom of the armrest support body, there is an armrest horizontal rotation shaft mechanism for the armrest support body to rotate horizontally; between the rear end of the armrest connecting piece and the top of the armrest vertical rod, there is a swing arm hinge mechanism for the armrest connecting piece to swing up and down in multiple gears. This armrest can not only be adjusted up and down, but also the armrest support body can rotate horizontally relative to the armrest connecting piece according to the needs of the user, or the armrest connecting piece can be turned up and down, and the armrest support body can be slid horizontally back and forth according to the needs, or the armrest connecting piece can rotate horizontally relative to the armrest vertical rod, and the adjustment is convenient and fast, meeting the needs of the user to fit the user's arm well under different usage conditions. However, during the process of the up-and-down flipping adjustment of the armrest connecting piece, it is divided into an adjustable state that can be positioned and a free state that can slide freely and is not damped. In this solution, friction is used to achieve the damping effect on the wedge block, resulting in easy active switching between the two states due to external forces, affecting the user experience. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a seat armrest that can stabilize the state of the seat armrest and is convenient to use.

[0004] The utility model also provides a seat with the above-mentioned seat armrest.

[0005] According to the seat armrest of the first aspect embodiment of the utility model, it includes a vertical rod main body, a connecting piece, an armrest main body, and a swing arm mechanism. The front end of the armrest main body is rotatably connected to the connecting piece so that the armrest main body can rotate in the horizontal plane. The rear end of the connecting piece is connected to the vertical rod main body. The swing arm mechanism is used to connect the connecting piece and the vertical rod main body and allow the connecting piece to swing up and down. Among them, the swing arm mechanism includes:

[0006] A first rotating shaft, fixedly connected to the vertical rod main body. The first rotating shaft is provided with a limiting ring, and the limiting ring is relatively fixed in position with the first rotating shaft. Along the outer edge of the limiting ring, there are two spaced limiting parts, and a first gear tooth is arranged between the two limiting parts;

[0007] The swing arm main body is sleeved on the first rotating shaft and is rotatably connected to the first rotating shaft. The swing arm main body is provided with a first clamping groove and a second clamping groove that communicate with each other. There are two groups of the first clamping groove and the second clamping groove. The swing arm main body is fixedly connected to the connecting piece;

[0008] The wedge block is clamped between the swing arm main body and the limiting ring. The wedge block can move between the two limiting parts. The wedge block is provided with a second gear tooth, and the second gear tooth can cooperate with the first gear tooth to relatively fix the swing arm main body and the first rotating shaft. The wedge block is provided with two limiting columns, and each limiting column is respectively placed in a group of the first clamping groove and the second clamping groove. Wherein, the limiting column can slide and switch between the first clamping groove and the second clamping groove. When the limiting column is clamped in the first clamping groove, the second gear tooth can be clamped and engaged with the first gear tooth. When the limiting column is clamped in the second clamping groove, the first gear tooth and the second gear tooth are separated;

[0009] Wherein, the swing arm main body is further provided with an elastic member, and the elastic member is attached to the lower end of the wedge block. When the limiting column is clamped in the first clamping groove, the elastic member pushes the wedge block to move upward from the bottom; when the limiting column is clamped in the second clamping groove, the elastic member is bent to create a space for the wedge block to be placed inside.

[0010] The seat armrest according to the embodiment of the present invention has at least the following beneficial effects: By using the switching of the limiting column between the first clamping groove and the second clamping groove, the armrest main body will not actively switch between the adjusted state and the free state, improving the stability of the seat armrest during use.

[0011] According to some embodiments of the present invention, a sliding groove is provided on the side surface of the swing arm main body. The middle part of the sliding groove protrudes inward and forms a stop portion. The stop portion divides the two ends of the sliding groove into the first clamping groove and the second clamping groove. A channel is formed between the stop portion and the inner wall of the sliding groove. The limiting column can pass through the channel to switch positions between the first clamping groove and the second clamping groove. When the limiting column is located in the channel, the limiting column is in interference fit with the channel.

[0012] According to some embodiments of the present invention, a spring mechanism for driving the connecting piece to fall and reset is further provided at the first rotating shaft.

[0013] According to some embodiments of the present utility model, a circular rotating groove is provided inside the armrest main body. A second rotating shaft is provided between the armrest main body and the connecting member. One end of the second rotating shaft is fixedly connected to the front end of the connecting member, and the other end is fixedly connected to a circular turntable. A third gear tooth is arranged in an array on the edge of the turntable. The turntable is pivotally placed inside the rotating groove in a manner that it can only pivot. A first guiding groove is provided inside the armrest main body, and the first guiding groove penetrates to the rotating groove. A first elastic clamping member is placed inside the first guiding groove. The first elastic clamping member is slidably connected to the first guiding groove. The front end of the first elastic clamping member is clamped with the third gear tooth to restrict the relative positions of the first elastic clamping member and the third gear tooth.

[0014] According to some embodiments of the present utility model, the third gear teeth are arranged around the turntable, and the surrounding arc of the third gear teeth is less than 360 degrees, so that a gap is formed between the two ends of the third gear teeth. A stop block is provided on the inner side of the rotating groove. The stop block is located between the two ends of the third gear teeth. The stop block can be in abutting cooperation with the end of the third gear tooth to restrict the rotation angle of the turntable.

[0015] According to some embodiments of the present utility model, along the length direction of the armrest main body, a second guiding groove is provided inside the armrest main body. A sliding seat is slidably connected to the second guiding groove. The rotating groove is provided on the sliding seat. A long groove is provided on the bottom surface of the armrest main body. The long groove extends along the length direction of the armrest main body and is correspondingly arranged with the second guiding groove. A plurality of clamping positions are arranged in an array on both sides of the second guiding groove. Second elastic clamping members that can be telescoped are provided on both sides of the sliding seat. The second elastic clamping members can be clamped with the clamping positions.

[0016] According to some embodiments of the present utility model, the height of the vertical rod main body is adjustable.

[0017] According to some embodiments of the present utility model, the vertical rod main body includes:

[0018] A fixed rod with a plurality of clamping grooves provided inside. The plurality of clamping grooves are arranged at intervals along the length direction of the fixed rod;

[0019] A lifting rod sleeved on the upper end of the fixed rod. The lifting rod is slidably matched with the fixed rod. The upper end of the lifting rod is fixedly connected to the swing arm mechanism;

[0020] The clamping part is strip-shaped. The upper end of the clamping part is hinged to the top end of the lifting rod, and the lower end extends into the fixed rod and is provided with a clamping hook. The clamping hook can be embedded into the clamping groove and is clamped with the clamping groove. On opposite sides of the upper end of the clamping part, a first driving part and a second driving part are respectively arranged. An elastic reset part is arranged between the second driving part and the inner side of the lifting rod. The elastic reset part drives the clamping part to rotate so that the clamping hook is clamped into the clamping groove.

[0021] The pressing part is movably connected to the outer side of the lifting rod. The pressing part can move on the lifting rod, abut against the first driving part, and drive the clamping hook to swing in a direction away from the clamping groove.

[0022] According to some embodiments of the present invention, a rotating seat is rotatably connected to the top end of the lifting rod. The first rotating shaft is fixedly connected to the rotating seat, and the rotating seat can pivot on the surface of the top end of the lifting rod.

[0023] The seat according to the second aspect embodiment of the present invention includes the above-mentioned seat armrest.

[0024] The seat according to the embodiment of the present invention has at least the following beneficial effects: By using the switching between the first clamping groove and the second clamping groove of the limiting column, the armrest main body will not actively switch between the adjustment state and the free state, improving the stability of the seat armrest during use.

[0025] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0026] The following further illustrates the present invention in conjunction with the drawings and embodiments, where:

[0027] Figure 1 is a schematic diagram of the seat armrest according to the embodiment of the present invention;

[0028] Figure 2 is an exploded schematic diagram of the seat armrest according to the embodiment of the present invention in one direction;

[0029] Figure 2-1 is Figure 2 an enlarged view of part A of

[0030] Figure 3 is an exploded schematic diagram of the seat armrest according to the embodiment of the present invention in another direction;

[0031] Figure 4 is a cross-sectional schematic diagram of the seat armrest according to the embodiment of the present invention;

[0032] Figure 5 Schematic diagram of the swing arm mechanism of the seat armrest according to an embodiment of the present utility model;

[0033] Figure 6 Schematic diagram of the first usage situation of the swing arm mechanism of the seat armrest according to an embodiment of the present utility model;

[0034] Figure 7 Schematic diagram of the second usage situation (the wedge block is not visible) of the swing arm mechanism of the seat armrest according to an embodiment of the present utility model;

[0035] Figure 8 Schematic diagram of the second usage situation (the wedge block is visible) of the swing arm mechanism of the seat armrest according to an embodiment of the present utility model;

[0036] Figure 9 Schematic diagram of the third usage situation of the swing arm mechanism of the seat armrest according to an embodiment of the present utility model.

[0037] 100, vertical rod main body; 110, fixed rod; 111, clamping groove; 120, lifting rod; 121, rotating seat; 130, clamping member; 131, clamping hook; 132, first driving part; 133, second driving part; 1231, elastic reset member; 140, pressing part;

[0038] 200, connecting member;

[0039] 300, armrest main body; 310, sliding seat; 311, rotating groove; 3111, stop block; 312, second elastic clamping member; 320, second rotating shaft; 321, turntable; 3211, third gear position tooth; 330, first guiding groove; 340, first elastic clamping member; 350, second guiding groove; 351, clamping position; 360, long groove;

[0040] 400, swing arm mechanism; 410, first rotating shaft; 411, limiting ring; 4111, limiting part; 4112, first gear position tooth; 413, fixed connecting member; 420, swing arm main body; 421, sliding groove; 4211, first clamping groove; 4212, second clamping groove; 4213, stop portion; 4214, channel; 422, elastic member; 430, wedge block; 431, second gear position tooth; 432, limiting column; 440, coil spring mechanism; Detailed implementation manners

[0041] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and cannot be construed as a limitation to the present utility model.

[0042] In the description of the present utility model, it should be understood that with respect to the orientation description, for example, the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0043] In the description of the present utility model, the meaning of several is one or more, the meaning of a plurality is two or more. Understanding of greater than, less than, exceeding, etc. does not include the present number, and understanding of above, below, within, etc. includes the present number. If the first and the second are described, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or the sequence relationship of the indicated technical features.

[0044] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present utility model in combination with the specific content of the technical solution.

[0045] The seat (not shown in the figure) of the embodiment of the present utility model includes a base and seat armrests. The seat armrests are installed on both sides of the base and are used to provide hand support for the user. Among them, with reference to Figures 1 to 9, the seat armrest of the present utility model includes a vertical rod main body 100, a connecting member 200, an armrest main body 300, and a swing arm mechanism 400. The front end of the armrest main body 300 is rotatably connected to the connecting member 200 so that the armrest main body 300 can rotate in a horizontal plane. The rear end of the connecting member 200 is connected to the vertical rod main body 100. The swing arm mechanism 400 is used to connect the connecting member 200 and the vertical rod main body 100 and allows the connecting member 200 to swing up and down. Among them, the swing arm mechanism 400 includes a first rotating shaft 410, a swing arm main body 420, and a wedge block 430. The first rotating shaft 410 is fixedly connected to the vertical rod main body 100. The first rotating shaft 410 is provided with a limit ring 411, and the limit ring 411 is relatively fixed in position with the first rotating shaft 410. There are two spaced-apart limit portions 4111 along the outer edge of the limit ring 411, and a first gear tooth 4112 is provided between the two limit portions 4111; the swing arm main body 420 is sleeved on the first rotating shaft 410 and is rotatably connected to the first rotating shaft 410. The swing arm main body 420 is provided with a first slot 4211 and a second slot 4212 that communicate with each other. There are two groups of the first slot 4211 and the second slot 4212, that is, there are 2 sliding grooves 421. The swing arm main body 420 is fixedly connected to the connecting member 200; the wedge block 430 is clamped between the swing arm main body 420 and the limit ring 411. The wedge block 430 can move between the two limit portions 4111. The wedge block 430 is provided with a second gear tooth 431, and the second gear tooth 431 can cooperate with the first gear tooth 4112 to make the swing arm main body 420 and the first rotating shaft 410 relatively fixed. The wedge block 430 is provided with two limit posts 432, and the two limit posts 432 are respectively located in the two sliding grooves 421. The limit posts 432 can slide and switch between the first slot 4211 and the second slot 4212. When the limit post 432 is clamped in the first slot 4211, the second gear tooth 431 can be clamped and engaged with the first gear tooth 4112. When the limit post 432 is clamped in the second slot 4212, the first gear tooth 4112 and the second gear tooth 431 are separated; among them, the swing arm main body 420 is further provided with an elastic member 422, and the elastic member 422 is attached to the lower end of the wedge block 430. When the limit post 432 is clamped in the first slot 4211, the elastic member 422 pushes the wedge block 430 to move upward from the bottom; when the limit post 432 is clamped in the second slot 4212, the elastic member 422 is bent to make room for the built-in wedge block 430.

[0046] Referring to Figures 6 to 9 , in actual use, the seat armrest has the following two states:

[0047] Adjustable state: Referring to Figure 6 , 7At this state, the limiting post 432 is snap-fitted into the first card slot 4211. Meanwhile, the elastic member 422 and the bottom of the wedge 430 are in abutment. In cooperation with the first card slot 4211, the limiting post 432 is prevented from moving into the second card slot 4212. When the swing arm main body 420 is lifted in the arrow direction, the second gear teeth 431 on the elastic member 422 and the first gear teeth 4112 on the limiting ring 411 will move relative to each other, and a snap connection is formed by the meshing cooperation between the first gear teeth 4112 and the second gear teeth 431, enabling the swing arm main body 420 to stay at any position, and further driving the armrest main body 300 to stay at any angle (within the rotatable range).

[0048] Free state: Refer to Figure 9 At this state, the limiting post 432 is snap-fitted into the second card slot 4212. At this time, the elastic member 422 is bent, creating a space for the built-in wedge 430. Also, the first gear teeth 4112 and the second gear teeth 431 are separated. When the user swings the armrest main body 300, there will be no damping, and it cannot hover at any angle, but can only stay at the lowest point or the highest point.

[0049] The switching of the limiting post 432 between the first card slot 4211 and the second card slot 4212 can prevent the armrest main body 300 from actively switching between the adjustment state and the free state, improving the stability of the seat armrest during use.

[0050] Specifically, the principle of the above technical effects is explained as follows:

[0051] In the adjustable state, refer to Figure 6 The swing arm main body 420 can swing arbitrarily within the swing range, and its swing range is the spatial distance between the two limiting parts 4111 of the wedge 430. When the swing arm main body 420 swings upward from the initial state (the armrest main body 300 is in the horizontal state) to the highest point (such as the positions shown in Figure 7 and Figure 8 ), the wedge 430 abuts against the upper limiting part 4111. At this time, the user can apply force to make the upper limiting part 4111 squeeze the wedge 430, causing the limiting post 432 of the wedge 430 to slide into the second card slot 4212 and be snap-fitted with the second card slot 4212 (such as Figure 9The position shown), specifically, during the process of the limiting post 432 sliding into the second card slot 4212, the user needs to apply a force far greater than the elastic force of the elastic member 422 and the frictional force between the limiting post 432 and the sliding groove 421, so that the limiting post 432 is stably clamped into the second card slot 4212, and the first gear tooth 4112 and the second gear tooth 431 are separated. At this time, the seat armrest changes from the adjustable state to the free state; when the user needs to reset to the adjustable state later, the user needs to externally forcefully squeeze the wedge block 430, so that the limiting post 432 on the wedge block 430 enters the first card slot 4211 from the second card slot 4212. Specifically, it is necessary to press down the swing arm main body 420, so that the limiting part 4111 at the lower end in the swing arm main body 420 abuts against the wedge block 430. By applying force to the swing arm main body 420, the limiting part 4111 and the wedge block 430 at the lower end are indirectly squeezed, so that the limiting block disengages from the second card slot 4212 and enters the first card slot 4211. At this time, the first gear tooth 4112 and the second gear tooth 431 are re-engaged and matched, and the seat armrest enters the adjustment state.

[0052] From the above usage principle, it can be seen that it is necessary to drive the swing arm manually (externally) to make the limiting post 432 disengage from the first card slot 4211 or the second card slot 4212. The clamping force is much greater than the fixed structure that uses frictional force to squeeze in the existing structure. Therefore, the overall structural stability of the seat armrest in the embodiment of the present invention can also be effectively improved.

[0053] In some embodiments, referring to Figure 7 , a sliding groove 421 is provided on the side surface of the swing arm main body 420. The middle part of the sliding groove 421 protrudes inward and forms a stop portion 4213. The stop portion 4213 divides the two ends of the sliding groove 421 into a first card slot 4211 and a second card slot 4212. A channel 4214 is formed between the stop portion 4213 and the inner wall of the sliding groove 421. The limiting post 432 can pass through the channel 4214 to switch positions between the first card slot 4211 and the second card slot 4212. When the limiting post 432 is located in the channel 4214, the limiting post 432 and the channel 4214 are in interference fit. In this structure, through the interference fit between the channel 4214 and the limiting post 432, the limiting effect on the limiting post 432 is improved, so that the limiting post 432 will not switch between the first card slot 4211 and the second card slot 4212 without being subjected to a large external force, so that the seat armrest can maintain structural stability whether in the adjustment state or the free state.

[0054] Among them, referring to Figure 5 , in the free state, in order to facilitate the swing arm main body 420 to actively reset to the lowest position (in the free state), a coil spring mechanism 440 for driving the connecting member 200 to fall and reset is also provided at the first rotating shaft 410.

[0055] In some embodiments, to achieve the horizontal rotation relationship between the armrest main body 300 and the connecting member 200, refer to Figure 2 , Figure 2-1 and Figure 3 . A circular rotating groove 311 is provided inside the armrest main body 300. A second rotating shaft 320 is provided between the armrest main body 300 and the connecting member 200. One end of the second rotating shaft 320 is fixedly connected to the front end of the connecting member 200, and the other end is fixedly connected to a circular turntable 321. A third gear tooth 3211 is arranged in a row on the edge of the turntable 321. The turntable 321 can be pivotally placed inside the rotating groove 311 and can only be pivotally placed. A first guiding groove 330 is provided inside the armrest main body 300. The first guiding groove 330 penetrates through to the rotating groove 311. A first elastic clamping member 340 is arranged inside the first guiding groove 330. The first elastic clamping member 340 is slidably connected to the first guiding groove 330. The front end of the first elastic clamping member 340 is clamped with the third gear tooth 3211 to constrain the relative positions of the first elastic clamping member 340 and the third gear tooth 3211.

[0056] In actual use, by rotating the entire armrest main body 300, the first elastic clamping member 340 located in the first guiding groove 330 moves relative to the third gear tooth 3211 on the edge of the turntable 321, so that the first elastic clamping member 340 can be clamped in different areas of the third gear tooth 3211, and the armrest main body 300 can be rotated relative to the connecting member 200 to different angles to adapt to different usage requirements of the user.

[0057] Furthermore, to constrain the rotation angle of the entire armrest main body 300, the third gear tooth 3211 is arranged around the turntable 321, and the surrounding arc of the third gear tooth 3211 is less than 360 degrees, so that there is a gap between the two ends of the third gear tooth 3211. A stop block 3111 is arranged on the inner side of the rotating groove 311. The stop block 3111 is located between the two ends of the third gear tooth 3211. The stop block 3111 can be in abutting cooperation with the end of the third gear tooth 3211 to constrain the rotation angle of the turntable 321. During the rotation of the armrest main body 300, the stop block 3111 moves between the two ends of the third gear tooth 3211, and by abutting against the two ends respectively, the rotation amplitude of the armrest main body 300 in two directions can be limited.

[0058] As a further optimization of the above structure, along the length direction of the armrest main body 300, a second guiding groove 350 is provided inside the armrest main body 300. A sliding seat 310 is slidably connected to the second guiding groove 350. A rotating groove 311 is provided on the sliding seat 310. A long groove 360 is provided on the bottom surface of the armrest main body 300. The long groove 360 extends along the length direction of the armrest main body 300 and is correspondingly arranged with the second guiding groove 350. A plurality of clamping positions 351 are arranged on both sides of the second guiding groove 350. Telescopic second elastic clamping members 312 are provided on both sides of the sliding seat 310. The second elastic clamping members 312 can be clamped with the clamping positions 351. By using the expansion and contraction of the second elastic clamping members 312, when the armrest main body 300 moves along the length direction, the second elastic clamping members 312 can be clamped into the clamping positions 351 at different positions and fix the armrest main body 300 at this position, which is convenient for the user to adjust the position of the armrest main body 300 along the length direction of the armrest main body 300.

[0059] In addition, the height of the vertical rod main body 100 is adjustable, so as to cooperate with the above structural features, refer to Figure 1 , to realize that the height of the entire seat armrest is adjustable in the vertical direction (along the up and down direction), the swing angle on the horizontal plane is adjustable (along the left and right direction), the length on the horizontal plane is adjustable (along the front and back direction), and the elevation angle on the vertical plane is adjustable (along the up and down direction), so as to improve the adaptability of the overall seat armrest.

[0060] Among them, it should be mentioned that, refer to Figure 4 The vertical rod main body 100 of the seat armrest in the embodiment of the present utility model includes a fixed rod 110, a lifting rod 120, a clamping member 130 and a pressing part 140. A plurality of clamping grooves 111 are provided inside the fixed rod 110. The plurality of clamping grooves 111 are arranged at intervals along the length direction of the fixed rod 110; the lifting rod 120 is sleeved on the upper end of the fixed rod 110. The lifting rod 120 is slidably matched with the fixed rod 110. The upper end of the lifting rod 120 is fixedly connected with the swing arm mechanism 400; the clamping member 130 is in a long strip shape. The upper end of the clamping member 130 is hinged to the top end of the lifting rod 120. The lower end extends into the fixed rod 110 and is provided with a clamping hook 131. The clamping hook 131 can be embedded into the clamping groove 111 and clamped with the clamping groove 111. First driving parts 132 and second driving parts 133 are respectively arranged on two opposite sides of the upper end of the clamping member 130. An elastic reset member 1231 is arranged between the second driving part 133 and the inner side of the lifting rod 120. The elastic reset member 1231 drives the clamping member 130 to rotate so that the clamping hook 131 is clamped into the clamping groove 111; the pressing part 140 is movably connected to the outside of the lifting rod 120. The pressing part 140 can move on the lifting rod 120 and abut against the first driving part 132 and drive the clamping hook 131 to swing in a direction away from the clamping groove 111.

[0061] When it is necessary to adjust the height of the vertical rod main body 100, it is achieved by the relative sliding between the lifting rod 120 and the fixed rod 110. During the relative sliding process, it is necessary to fix the vertical rod main body 100 at a certain height to facilitate the user's use. Specifically, the pressing part 140 and the lifting rod 120 are movably connected by pressing. Directly pressing the pressing part 140 makes the pressing part 140 abut against the first driving part 132. At this time, the clamping part 130 whose end is pivotally connected to the inner side of the lifting rod 120 swings towards the right, and the hook 131 moves away from the clamping groove 111. At this time, the lifting rod 120 can slide freely between the fixed rod 110. After sliding to the appropriate height, release the pressing part 140. At this time, the elastic force from the elastic reset part 1231 acts on the second driving part 133. The force acting on the second driving part 133 makes the end of the clamping part 130 swing towards the left, and then makes the hook 131 snap into the clamping groove 111, realizing the relative fixation of the hook 131 and the clamping groove 111. At this time, the lifting rod 120 will be fixed on the fixed rod 110 and cannot fall off the fixed rod 110, thus realizing the fixed constraint of the height of the entire vertical rod main body 100.

[0062] Furthermore, a rotating seat 121 is rotatably connected to the top end of the lifting rod 120. The first rotating shaft 410 is fixedly connected to the rotating seat 121, and the rotating seat 121 can pivot on the top surface of the lifting rod 120. This enables the connecting part 200 and the handrail main body 300 to adjust the angle on the end surface of the lifting rod 120. Specifically, the entire swing arm mechanism 400 is built inside the connecting part 200 and is fixedly connected to the rotating seat 121 through the fixed connecting piece 413 and the rotating shaft, so that the position of the rotating shaft relative to the rotating seat 121 will not change.

[0063] The above has described the embodiments of the present invention in detail with reference to the drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art to which it pertains, various changes can be made without departing from the gist of the present invention.

Claims

1. A chair armrest, comprising a vertical rod body (100), a connecting piece (200) and an armrest body (300), wherein the armrest body (300) and the front end of the connecting piece (200) are rotatably connected so that the armrest body (300) can rotate in a horizontal plane, and the rear end of the connecting piece (200) is connected to the vertical rod body (100), characterized in that: It also includes a swing arm mechanism (400), which is used to connect the connecting member (200) and the upright pole body (100) and allows the connecting member (200) to swing up and down, wherein the swing arm mechanism (400) includes: A first rotating shaft (410) is fixedly connected to the upright main body (100); the first rotating shaft (410) is provided with a limiting ring (411); the limiting ring (411) and the first rotating shaft (410) are relatively fixed in position; two limiting portions (4111) are arranged at intervals along the outer edge of the limiting ring (411); a first gear tooth (4112) is arranged between the two limiting portions (4111); The swing arm body (420) is sleeved on the first rotating shaft (410) and is rotatably connected to the first rotating shaft (410). The swing arm body (420) is provided with a first card slot (4211) and a second card slot (4212) that are connected. The first card slot (4211) and the second card slot (4212) are provided in two groups. The swing arm body (420) and the connecting member (200) are fixedly connected. The wedge block (430) is sandwiched between the swing arm body (420) and the limiting ring (411). The wedge block (430) can move between the two limiting parts (4111). The wedge block (430) is provided with a second gear tooth (431). The second gear tooth (431) can cooperate with the first gear tooth (4112) to relatively fix the swing arm body (420) and the first rotating shaft (410). The wedge block (430) is provided with two limiting posts (432). Each limiting post (432) is respectively built in a The first card slot (4211) and the second card slot (4212) are formed into a group, wherein the limiting column (432) can slide and switch between the first card slot (4211) and the second card slot (4212); when the limiting column (432) is engaged with the first card slot (4211), the second gear tooth (431) can be engaged and meshed with the first gear tooth (4112); when the limiting column (432) is engaged with the second card slot (4212), the first gear tooth (4112) and the second gear tooth (431) are separated; The swing arm body (420) is further provided with an elastic member (422), and the elastic member (422) and the lower end of the wedge block (430) are fitted together. When the limiting column (432) is engaged with the first slot (4211), the elastic member (422) pushes the wedge block (430) to move from bottom to top; when the limiting column (432) is engaged with the second slot (4212), the elastic member (422) is bent to make room for the wedge block (430) to be built in.

2. The chair armrest according to claim 1, characterized in that: A slide groove (421) is provided on the side of the swing arm body (420), and the middle part of the slide groove (421) protrudes inward to form a stopper (4213), and the stopper (4213) divides the two ends of the slide groove (421) into the first slot (4211) and the second slot (4212). A channel (4214) is formed between the stopper (4213) and the inner wall of the slide groove (421), and the limiting column (432) can pass through the channel (4214) to switch the position between the first slot (4211) and the second slot (4212). When the limiting column (432) is located in the channel (4214), the limiting column (432) and the channel (4214) are interference fit.

3. The chair armrest according to claim 1 or 2, characterized in that: The first rotating shaft (410) is also provided with a coil spring mechanism (440) for driving the connecting member (200) to fall and reset.

4. The chair armrest according to claim 1, characterized in that: A circular rotating groove (311) is arranged inside the armrest body (300); a second rotating shaft (320) is arranged between the armrest body (300) and the connecting member (200); one end of the second rotating shaft (320) is fixedly connected to the front end of the connecting member (200); and the other end is fixedly connected to a circular rotating disk (321); the edge of the rotating disk (321) is arranged with third gear teeth (3211); and the rotating disk (321) can and can only be pivotally built into the rotating groove (311). In the embodiment, a first guide groove (330) is arranged inside the armrest body (300), and the first guide groove (330) penetrates into the rotating groove (311), and a first elastic clip (340) is built in the first guide groove (330), and the first elastic clip (340) and the first guide groove (330) are slidably connected, and the front end of the first elastic clip (340) is engaged with the third gear tooth (3211) to constrain the relative position of the first elastic clip (340) and the third gear tooth (3211).

5. The chair armrest according to claim 4, characterized in that: The third gear tooth (3211) is arranged around the rotating disk (321), and the surrounding arc of the third gear tooth (3211) is less than 360 degrees, so that a gap is formed between the two ends of the third gear tooth (3211). A stopper (3111) is arranged on the inner side of the rotating groove (311), and the stopper (3111) is located between the two ends of the third gear tooth (3211). The stopper (3111) can be abutted and matched with the end of the third gear tooth (3211) to constrain the rotation angle of the rotating disk (321).

6. The chair armrest according to claim 4, characterized in that: Along the length direction of the armrest body (300), the armrest body (300) is built with a second guide groove (350), the second guide groove (350) is slidably connected to a sliding seat (310), the rotating groove (311) and the first guide groove (330) are both located on the sliding seat (310), the rotating groove (311) is arranged on the sliding seat (310), a long groove (360) is arranged on the bottom surface of the armrest body (300), the long groove (360) extends along the length direction of the armrest body (300), and is arranged corresponding to the second guide groove (350), a plurality of engaging positions (351) are arranged on both sides of the second guide groove (350), and retractable second elastic clamps (312) are arranged on both sides of the sliding seat (310), and the second elastic clamps (312) can be engaged with the engaging positions (351).

7. The chair armrest according to claim 1, characterized in that: The height of the upright pole body (100) is adjustable.

8. The chair armrest according to claim 7, characterized in that: The upright pole body (100) comprises: A fixing rod (110) is provided with a plurality of clamping grooves (111) inside, and the plurality of clamping grooves (111) are arranged at intervals along the length direction of the fixing rod (110); A lifting rod (120) is sleeved on the upper end of the fixed rod (110), the lifting rod (120) and the fixed rod (110) are slidably matched, and the upper end of the lifting rod (120) is fixedly connected to the swing arm mechanism (400); The clamping member (130) is in the shape of an elongated strip. The upper end of the clamping member (130) is hinged to the top end of the lifting rod (120), and the lower end extends into the fixing rod (110). A clamping hook (131) is provided. The clamping hook (131) can be embedded in the clamping groove (111) and clamped with the clamping groove (111). The first driving part (132) and the second driving part (133) are respectively provided on two opposite sides of the upper end of the clamping member (130). An elastic reset member (1231) is provided between the second driving part (133) and the inner side of the lifting rod (120). The elastic reset member (1231) drives the clamping member (130) to rotate so that the clamping hook (131) is clamped into the clamping groove (111). The pressing portion (140) is movably connected to the outside of the lifting rod (120); the pressing portion (140) can move on the lifting rod (120), abut against the first driving portion (132), and drive the hook (131) to swing in a direction away from the locking groove (111).

9. The chair armrest according to claim 8, characterized in that: The top end of the lifting rod (120) is rotatably connected to a rotating seat (121); the first rotating shaft (410) and the rotating seat (121) are fixedly connected; and the rotating seat (121) can pivot on the top end surface of the lifting rod (120).

10. A seat, characterized in that: The chair armrest comprises the chair armrest according to any one of claims 1 to 9.

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