Rotatable chair armrest capable of being adjusted front and back

Abstract

The utility model relates to a chair armrest capable of being adjusted front and back and rotating. The technical problem that an existing handrail is insufficient in stability is solved. Comprising a handrail stand column arranged at the upper end of a handrail mounting part, a handrail body internally provided with a front-back movable seat is movably arranged at the upper end of the handrail stand column, the front-back movable seat is movably connected with the handrail body through a front-back adjusting mounting mechanism, and a rotating seat is arranged between the handrail stand column and the handrail body; the upper end of the rotating base is fixedly connected with the front-back movable base through an installation fixing mechanism, the lower end face of the rotating base is in rotating fit with the upper end face of the handrail stand column through an inclined face, and a multi-gear circumferential positioning mechanism capable of enabling the rotating base and the handrail stand column to be circumferentially positioned is arranged between the handrail stand column and the rotating base. The device has the advantages that the front-back movable seat is connected with the rotating seat through the mounting and fixing mechanism, the overall structural strength can be improved, user operation can be facilitated, and the service life is prolonged. And the rotating seat and the multi-gear circumferential positioning mechanism can meet the large-angle rotating requirement of a user.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of seat armrest, specifically relates to a chair armrest that can be adjusted in front and back and can rotate. BACKGROUND

[0002] In the current seat design and manufacturing industry, the functional design of the seat armrest is extremely critical, directly affecting the comfort experience of the user, and also plays a decisive role in the overall practicality and aesthetics of the seat; with the continuous improvement of life quality, and the increasing demand of people for seat use in various scenes, people's requirements for seat armrests are also getting higher and higher, but the existing seat armrests can only provide basic support function for users, and cannot meet the user's multi-scene use demand, affecting the user's use experience.

[0003] In order to solve the problems existing in the prior art, people have carried out long-term exploration and put forward various kinds of solutions. For example, Chinese patent document discloses a multifunctional armrest [202421010070.0], which comprises: a support main body, the support main body is longitudinally arranged and connected to the side end of the seat part; an armrest part, the armrest part is arranged to support the elbow of the human body, the bottom end of the armrest part is movably connected with a panel support, so that the armrest part can change state relative to the panel support; a rotating support, which is arranged obliquely between the panel support and the support main body, the front end of the rotating support and the panel support are connected through a sliding mechanism, so that the armrest part can slide forward and backward relative to the panel support; the rear end of the rotating support and the support main body are rotatably connected, so that the armrest part can rotate relative to the support main body.

[0004] The above-mentioned scheme solves the problem that the existing seat armrest cannot meet the user's multi-scene demand to some extent, but the scheme still has many deficiencies, for example, the sliding mechanism is arranged at one end of the armrest and the rotating support is arranged on the support main body at the other end, which leads to loose connection of the internal structure of the armrest, uneven stress of each component during use, and affects the service life of the armrest in long-term use. SUMMARY

[0005] The utility model aims at the above-mentioned problem, provides a chair armrest that can be adjusted in front and back and can rotate.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: this one before and after adjustable and can rotate's chair armrest, including setting on the armrest mounting portion upper end armrest stand, the armrest stand upper end movablely equipped with the armrest body with inside having before and after movable seat, before and after movable seat with armrest body between through before and after adjustment mounting mechanism movablely link together, armrest stand and armrest body between be equipped with the rotating seat, the rotating seat upper end is fixedly connected with before and after movable seat through installation fixed mechanism, the rotating seat lower end and armrest stand upper end between circumferential rotation and axial positioning link together, the rotating seat lower end surface and armrest stand upper end surface between through the inclined surface rotation cooperation, armrest stand and rotating seat between be equipped with the multi -gear circumferential positioning mechanism that can make rotating seat and armrest stand circumferential positioning, through before and after movable seat and before and after adjustment mounting mechanism can make armrest body before and after displacement adjustment on the rotating seat, through installation fixed mechanism makes before and after movable seat before and after sliding setting on the rotating seat, through multi -gear circumferential positioning structure can be according to user demand to rotating seat carry out rotation positioning locking, and armrest body and rotating seat carry out synchronous rotation, convenient for user operation, improve user experience.

[0007] In the above-mentioned before and after adjustable and rotatable chair armrest, the installation fixed mechanism includes a mounting seat arranged on the upper end of the before and after movable seat, and the mounting seat is connected with a fixed plate arranged in the rotating seat and fixed on the lower side of the armrest body through an installation fixed component. The installation fixed component can ensure the connection stability between the mounting seat and the fixed plate, and ensure the connection stability between the before and after movable seat and the rotating seat.

[0008] In the above-mentioned before and after adjustable and rotatable chair armrest, the installation fixed component includes a plug-in slot arranged on the lower side of both ends of the mounting seat, and the plug-in slot is plugged with a plug-in plate arranged in the before and after movable seat. The fixed plate is arranged in the opening on the upper end of the rotating seat through a fixed bolt, and a fixed column with a non-circular cross section is arranged on the upper end of the fixed plate. The fixed column is plugged into the fixed slot in the center of the lower end of the mounting seat after passing through the strip-shaped hole on the lower side of the armrest body and the notch on the lower end of the before and after movable seat. The fixed column and the fixed slot are matched in shape, and the fixed column is fixedly connected with the mounting seat through a mounting bolt. The plug-in slot and the plug-in plate can ensure the plug-in effect of the mounting seat and the before and after movable seat, so that the before and after movable seat is fixedly connected with the fixed plate through the mounting seat. The mounting bolt and the fixed column can ensure the connection stability between the fixed plate and the mounting seat. The fixed column can move back and forth in the strip-shaped hole along with the before and after movable seat, and the fixed column can limit the before and after movable seat.

[0009] In the above-mentioned front and rear adjustable and rotatable chair armrest, the center of the inner side of the upper end of the rotating seat has a rotating groove, a rotating disc is rotatably arranged in the rotating groove, the upper end of the armrest column has a positioning column with a non-circular cross section, the positioning column penetrates into the rotating seat and is inserted into the central groove at the lower end of the rotating disc, the positioning column and the central groove are matched in shape, the rotating disc is fixedly connected with the positioning column through a positioning bolt, the rotating disc can be conveniently placed through the rotating groove, the positioning column can be conveniently placed through the central groove, and the connection stability between the positioning column and the rotating disc is ensured through the positioning bolt.

[0010] In the above-mentioned front and rear adjustable and rotatable chair armrest, the multi-gear circumferential positioning mechanism includes a circumferential positioning seat arranged at the upper end of the armrest column, the circumferential positioning seat is slidably arranged in the rotating groove at the lower end of the rotating seat, and a multi-gear circumferential positioning assembly is arranged between the circumferential positioning seat and the rotating groove, the circumferential positioning seat can rotate in the rotating groove, and the multi-gear circumferential positioning assembly can be positioned and abutted with the rotating groove in the circumferential positioning seat, so as to ensure the positioning and locking effect of the multi-gear circumferential positioning assembly.

[0011] In the above-mentioned front and rear adjustable and rotatable chair armrest, the rotating groove is arc-shaped and arranged on the circumferential outer side of the positioning column with the center of the positioning column as the center, the angle of the rotating groove is 180-250 degrees, the circumferential positioning seat can rotate and position around the positioning column according to the angle of the rotating groove, and the multi-gear circumferential positioning assembly is used for positioning and locking according to the angle requirement of the user, so as to meet the angle selection requirement of the user and improve the user experience.

[0012] In the above-mentioned front and rear adjustable and rotatable chair armrest, the multi-gear circumferential positioning assembly includes a plurality of positioning shallow grooves arranged in the rotating groove in sequence, a ball is movably arranged at the inner side of the upper end of the circumferential positioning seat, the ball is exposed from the positioning shallow groove and abuts against any one of the positioning shallow grooves, and a first pressing spring acting on the ball is arranged in the circumferential positioning seat, the positioning shallow groove is matched with the ball, the first pressing spring can press the ball in the positioning shallow groove, the positioning effect of the circumferential positioning seat is ensured, and when the circumferential positioning seat rotates, the ball drives the first pressing spring to be compressed, so as to facilitate the user to adjust the rotation angle of the armrest.

[0013] In the above-mentioned front and rear adjustable and rotatable chair armrest, the armrest body is composed of an upper armrest shell and a lower armrest shell, the strip-shaped hole is arranged on the lower side of the lower armrest shell, the front and rear adjustment mounting mechanism includes two guide plates arranged axially and parallel on the inner side of the lower armrest shell, the front and rear movable seat is slidably arranged between the two guide plates, one end of the guide plate and the corresponding side are respectively provided with a plurality of arc-shaped grooves, one end of the front and rear movable seat is movably provided with a positioning part matched with the arc-shaped groove, and the other end of the positioning part is abutted in any one of the arc-shaped grooves and provided with a second pressing spring, the guide plate can limit and guide the front and rear movable seat, so that the front and rear movable seat can only move forward and backward, the second pressing spring can press the positioning part and the arc-shaped groove, so as to ensure the positioning and locking effect of the front and rear movable seat, when the front and rear movable seat moves forward and backward, the positioning part drives the second pressing spring to compress, so as to ensure the smoothness of the front and rear movement of the front and rear movable seat, and when the front and rear movable seat stops moving, the second pressing spring drives the positioning part to press and lock towards the arc-shaped groove.

[0014] In the above-mentioned front and rear adjustable and rotatable chair armrest, the inclined surface includes a first inclined surface arranged on the lower end surface of the rotating seat and a second inclined surface arranged on the upper end of the armrest column, and the first inclined surface and the second inclined surface are arranged in the same direction, and the circumferential outer side of the armrest column and the circumferential outer side of the rotating seat are smoothly connected by a curved surface, the first inclined surface and the second inclined surface can make the connection between the rotating seat and the armrest column more fit, improve the appearance, and the curved surface can reduce the friction between the rotating seat and the armrest column, reduce wear.

[0015] In the above-mentioned front and rear adjustable and rotatable chair armrest, the armrest mounting part is in a bent shape, one end of the armrest mounting part has a connecting rod arranged in the armrest column, and the other end is provided with a plurality of armrest mounting holes, the connecting rod and the armrest column are axially and slidably connected, and the connecting rod and the armrest column are axially positioned by the key assembly on the outer side of the armrest column, the key assembly includes a lifting groove arranged in the connecting rod, a plurality of lifting teeth corresponding to each other are arranged on both sides of the lifting groove, the lifting groove has a lifting block arranged between adjacent lifting teeth at one end, the other end of the lifting groove is fixedly provided with a lifting control base, a lifting control part extending to the lifting control base is arranged on the lifting block, and a control switch is arranged at the end of the lifting control part away from the lifting block, a control spring is arranged between the control switch and the lifting control base, and a rotating shaft capable of moving the lifting block in the lifting groove when the control switch is pressed is arranged between the lifting control part and the lifting control base, the rotating shaft can make the lifting block move up and down away from the lifting tooth when the control switch is pressed, so that the armrest column moves up and down, and when the control switch is released, the lifting block is arranged between the lifting teeth, the lifting teeth limit the lifting block, and the locking effect is ensured.

[0016] Compared with the prior art, the utility model has the advantages of:

[0017] 1、The front and rear movable seat and the rotating seat are connected through the mounting fixing mechanism, the overall structural strength can be improved, and the service life is improved.

[0018] 2、The rotating seat and the multi-gear circumferential positioning mechanism can meet the large-angle rotation demand of the user, and can ensure the rotation positioning stability and improve the user experience.

[0019] 3、The front and rear adjusting mounting mechanism can be conveniently adjusted by the user, meets the multi-scene demand of the user, and further improves the user experience. DETAILED DESCRIPTION

[0020] Figure 1 It is the structure schematic view of the utility model.

[0021] Figure 2 It is the structure sectional view of the utility model.

[0022] Figure 3 It is the structure sectional view of the front and rear adjusting mounting mechanism in the utility model.

[0023] Figure 4 It is the structure schematic view of the handrail body in the utility model.

[0024] Figure 5 It is the structure explosion drawing of the rotating seat in the utility model.

[0025] Figure 6 It is the structure explosion drawing of the multi-gear circumferential positioning assembly in the utility model.

[0026] Figure 7 It is the structure schematic view in the displacement state.

[0027] Figure 8 It is the structure schematic view in another displacement state.

[0028] In the figure: handrail mounting part 1, connecting rod 11, handrail mounting hole 12, handrail stand 2, handrail body 3, front and rear movable seat 31, handrail upper shell 32, handrail lower shell 33, front and rear adjustment mounting mechanism 4, guide plate 41, arc-shaped groove 42, positioning part 43, second pressing spring 44, rotating seat 5, rotating groove 51, rotating disc 52, positioning column 53, center groove 54, positioning bolt 55, mounting and fixing mechanism 6, mounting seat 61, mounting and fixing assembly 62, plug-in groove 621, plug-in plate 622, fixed column 623, strip-shaped hole 624, notch 625, fixed groove 626, mounting bolt 627, fixed plate 63, inclined surface 7, first inclined surface 71, second inclined surface 72, curved surface 73, multi-gear circumferential positioning mechanism 8, circumferential positioning seat 81, multi-gear circumferential positioning assembly 82, positioning shallow groove 821, ball 822, first pressing spring 823, button assembly 9. DETAILED DESCRIPTION

[0029] The utility model will be made further detailed explanation in combination with the specific embodiment and the drawing.

[0030] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the front and rear adjustable and rotatable chair armrest comprises an armrest column 2 arranged at the upper end of the armrest mounting part 1, wherein the length of the armrest column 2 is 8.5 cm, which can be conveniently installed and supported by the armrest mounting part 1, and the upper end of the armrest column 2 is movably provided with an armrest body 3 with a front and rear movable seat 31, wherein the length of the armrest body 3 is 5 cm and the width is 1.5 cm, and the front and rear movable seat 31 is movably connected with the armrest body 3 through a front and rear adjusting mounting mechanism 4, a rotating seat 5 is arranged between the armrest column 2 and the armrest body 3, the upper end of the rotating seat 5 is fixedly connected with the front and rear movable seat 31 through a mounting and fixing mechanism 6, the rotating seat 5 is fixedly connected with the front and rear movable seat 31, which can improve the overall structural strength and prolong the service life of the armrest, the lower end of the rotating seat 5 is circumferentially rotatable and axially positionable connected with the upper end of the armrest column 2, the lower end surface of the rotating seat 5 and the upper end surface of the armrest column 2 are rotatably connected through an inclined surface 7, the inclined surface 7 can make the connection between the rotating seat 5 and the armrest column 2 more fit, improve the appearance and ensure the supporting effect of the armrest column 2 on the rotating seat 5, a multi-position circumferential positioning mechanism 8 is arranged between the armrest column 2 and the rotating seat 5, which can position the rotating seat 5 and the armrest column 2 circumferentially, the front and rear movable seat 31 and the front and rear adjusting mounting mechanism 4 can make the armrest body 3 displace and adjust on the rotating seat 5, the front and rear movable seat 31 is slidably arranged on the rotating seat 5 through the mounting and fixing mechanism 6, the rotating seat 5 can be rotationally positioned and locked according to user's needs through the multi-position circumferential positioning structure 8, and the armrest body 3 and the rotating seat 5 rotate synchronously, which is convenient for user to operate and improves user's experience.

[0031] Specifically, the mounting and fixing mechanism 6 comprises a mounting seat 61 arranged at the upper end of the front and rear movable seat 31, the mounting seat 61 is connected with a fixed plate 63 arranged in the rotating seat 5 and fixedly arranged at the lower side of the armrest body 3 through a mounting and fixing assembly 62, which can ensure the connection stability between the mounting seat 61 and the fixed plate 63 and the connection stability between the front and rear movable seat 31 and the rotating seat 5.

[0032] The installation fixing assembly 62 comprises plug-in grooves 621 arranged on the lower sides of both ends of the mounting seat 61, the plug-in grooves 621 are plugged with plug-in plates 622 arranged in the front and rear movable seats 31, the fixed plate 63 is arranged in the opening on the upper end of the rotating seat 5 through fixing bolts, a fixed column 623 with a non-circular cross section is arranged on the upper end of the fixed plate 63, the fixed plate 63 is fixedly arranged in the rotating seat 5 through fixing bolts, the fixed column 623 is plugged into a fixed groove 626 at the center of the lower end of the mounting seat 61 through a strip-shaped hole 624 on the lower side of the handrail body 3 and a gap 625 at the lower end of the front and rear movable seats 31, the fixed column 623 and the fixed groove 626 are matched in shape, and the fixed column 623 is fixedly connected with the mounting seat 61 through mounting bolts 627, the plug-in grooves 621 and the plug-in plates 622 ensure the plug-in effect of the mounting seat 61 and the front and rear movable seats 31, the front and rear movable seats 31 are fixedly connected with the fixed plate 63 through the mounting seat 61, the mounting bolts 627 and the fixed column 623 ensure the connection stability between the fixed plate 63 and the mounting seat 61, and the fixed column 623 can move forward and backward in the strip-shaped hole 624, and the fixed column 623 can limit the front and rear movable seats 31.

[0033] As shown in Figure 1 , Figure 2 , Figure 5 , Figure 6 , the center of the inner side of the upper end of the rotating seat 5 has a rotating groove 51, a rotating disc 52 is rotatably arranged in the rotating groove 51, the upper end of the handrail column 2 has a positioning column 53 with a non-circular cross section, the positioning column 53 penetrates into the rotating seat 5 and is plugged into a center groove 54 at the lower end of the rotating disc 52, the positioning column 53 and the center groove 54 are matched in shape, and the rotating disc 52 is fixedly connected with the positioning column 53 through positioning bolts 55, the rotating groove 51 can conveniently place the rotating disc 52, the center groove 54 can conveniently place the positioning column 53, and the positioning bolts 55 ensure the connection stability between the positioning column 53 and the rotating disc 52.

[0034] Further, the multi-position circumferential positioning mechanism 8 comprises a circumferential positioning seat 81 arranged on the upper end of the handrail column 2, the circumferential positioning seat 81 is slidingly arranged in the rotating groove 51 at the lower end of the rotating seat 5, a multi-position circumferential positioning assembly 82 is arranged between the circumferential positioning seat 81 and the rotating groove 51, the circumferential positioning seat 81 can rotate in the rotating groove 51, the multi-position circumferential positioning assembly 82 can be positioned and abutted with the rotating groove 51 in the circumferential positioning seat 81, and the positioning and locking effect of the multi-position circumferential positioning assembly 82 is ensured.

[0035] The rotating groove 51 is arc-shaped and is arranged outside the positioning column 53 in a circumferential direction with the center of the positioning column 53 as a center, the angle of the rotating groove 51 is 180-250 degrees, and the circumferential positioning seat 81 can be rotationally positioned around the positioning column 53 according to the angle of the rotating groove 51, and is positioned and locked by the multi-gear circumferential positioning assembly 82 according to the angle required by the user, so as to meet the angle selection requirement of the user and improve the user experience.

[0036] In combination Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown in the figure, the multi-gear circumferential positioning assembly 82 comprises a plurality of positioning shallow grooves 821 arranged in the rotating groove 51 in sequence, the circumferential positioning seat 81 is movably provided with a ball 822 on the inner side of the upper end, the ball 822 is exposed from the positioning shallow groove 821 and abuts against any one of the positioning shallow grooves 821, and a first pressing spring 823 acting on the ball 822 is arranged in the circumferential positioning seat 81, the positioning shallow groove 821 can be matched with the ball 822, and the ball 822 can be pressed in the positioning shallow groove 821 by the first pressing spring 823, so as to ensure the positioning effect of the circumferential positioning seat 81, and when the circumferential positioning seat 81 rotates, the ball 822 drives the first pressing spring 823 to be compressed, so as to facilitate the user to adjust the rotating angle of the armrest body 3, and the armrest can be rotated inwards by 45 degrees and outwards by 205 degrees by cooperation of the positioning shallow groove 821 and the ball 822, so as to meet the requirement of the user in various use environments and improve the user experience, and when the armrest body 3 is displaced towards the shorter end, the other end of the armrest body 3 can be easily placed on the elbow of the user, so as to facilitate the user to sit on the seat and perform game operation and other activities, thereby improving the user experience, and when the multi-gear circumferential positioning assembly 82 is rotated outwards, the longer end of the armrest body 3 can be arranged towards the user, and when the user leans back on the chair, the armrest body 3 is arranged in an inclined manner, so as to facilitate the user to place the elbow in the leaning back state, thereby further improving the user experience.

[0037] The handrail body 3 is composed of the upper handrail shell 32 and the lower handrail shell 33, the upper handrail shell 32 and the lower handrail shell 33 are combined, the user can conveniently disassemble and assemble the parts in the handrail body 3, the disassembling and assembling efficiency is improved, the strip-shaped hole 624 is arranged on the lower side of the lower handrail shell 33, the front and rear adjusting and mounting mechanism 4 comprises two guide plates 41 which are axially and parallelly arranged on the inner side of the lower handrail shell 33, the front and rear movable seat 31 is slidingly arranged between the two guide plates 41, the one end and the corresponding side of the guide plate 41 are sequentially provided with a plurality of arc-shaped grooves 42, the two sides of the one end of the front and rear movable seat 31 are movably provided with the positioning portions 43 matched with the arc-shaped grooves 42, the one end of the positioning portion 43 abuts against the arc-shaped groove 42 and the other end is provided with the second pressing spring 44, the guide plate 41 can limit and guide the front and rear movable seat 31, the front and rear movable seat 31 can only move forward and backward, the positioning portion 43 and the arc-shaped groove 42 are pressed by the second pressing spring 44, the positioning and locking effect of the front and rear movable seat 31 is ensured, when the front and rear movable seat 31 moves forward and backward, the positioning portion 43 drives the second pressing spring 44 to compress, the forward and backward movement of the front and rear movable seat 31 is smooth, and when the front and rear movable seat 31 stops moving, the second pressing spring 44 drives the positioning portion 43 to press and lock towards the arc-shaped groove 42.

[0038] Specifically, the inclined surface 7 comprises a first inclined surface 71 arranged on the lower end surface of the rotating seat 5 and a second inclined surface 72 arranged on the upper end of the handrail column 2, the first inclined surface 71 and the second inclined surface 72 are arranged in the same direction, the circumferential outer side of the handrail column 2 and the circumferential outer side of the rotating seat 5 are smoothly connected through the curved surface 73, the connection between the rotating seat 5 and the handrail column 2 is more matched through the first inclined surface 71 and the second inclined surface 72, the aesthetic appearance is improved, and the friction between the rotating seat 5 and the handrail column 2 is reduced through the curved surface 73, and the abrasion is reduced.

[0039] In combination Figure 1 , Figure 2As shown, the handrail mounting portion 1 is in a bent shape, one end of the handrail mounting portion 1 is provided with a connecting rod 11 arranged in the handrail column 2, and the other end is provided with a plurality of handrail mounting holes 12, the connecting rod 11 can support the handrail column 2, the handrail mounting holes 12 can facilitate the installation of the handrail mounting portion 1 on the seat, the connecting rod 11 and the handrail column 2 are connected in axial sliding, the connecting rod 11 and the handrail column 2 are positioned by the button assembly 9 outside the handrail column 2, the button assembly 9 includes a lifting groove arranged in the connecting rod 11, a plurality of lifting teeth corresponding to each other are arranged on both sides of the lifting groove, a lifting block is arranged between adjacent lifting teeth at one end of the lifting groove, a lifting control base is fixedly arranged at the other end of the lifting groove, a lifting control portion extending to the lifting control base is arranged on the lifting block, a control switch is arranged at one end of the lifting control portion away from the lifting block, a control spring is arranged between the control switch and the lifting control base, and a rotating shaft capable of moving the lifting block in the lifting groove when the control switch is pressed is arranged between the lifting control portion and the lifting control base. When the control switch is pressed, the lifting block can be lifted up and down by the rotating shaft to lift the handrail column 2, and when the control switch is released, the lifting block is arranged between the lifting teeth, the lifting teeth limit the lifting block to ensure the locking effect.

[0040] The principle of the embodiment is that the handrail body 3 is arranged on the handrail column 2 through the rotating seat 5, the handrail body 3 is provided with front and rear movable seats 31 fixedly connected with the rotating seat 5, the front and rear movable seats 31 and the front and rear adjustment mounting mechanism 4 can adjust the front and rear displacement of the handrail body 3 on the rotating seat 5, the rotating seat 5 can rotate the handrail body 3 in a circumferential direction through the multi-position circumferential positioning mechanism 8, and the height of the handrail column 2 can be adjusted through the button assembly 9, so as to adjust the height of the handrail body 3.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

[0042] Although the handrail mounting portion 1, the connecting rod 11, the handrail mounting hole 12, the handrail stand 2, the handrail body 3, the front and rear movable seat 31, the handrail upper shell 32, the handrail lower shell 33, the front and rear adjustment mounting mechanism 4, the guide plate 41, the arc-shaped groove 42, the positioning portion 43, the second pressing spring 44, the rotating seat 5, the rotating groove 51, the rotating disc 52, the positioning column 53, the center groove 54, the positioning bolt 55, the mounting fixing mechanism 6, the mounting seat 61, the mounting fixing assembly 62, the plug-in groove 621, the plug-in plate 622, the fixed column 623, the strip-shaped hole 624, the notch 625, the fixed groove 626, the mounting bolt 627, the fixed plate 63, the inclined surface 7, the first inclined surface 71, the second inclined surface 72, the curved surface 73, the multi-gear circumferential positioning mechanism 8, the circumferential positioning seat 81, the multi-gear circumferential positioning assembly 82, the positioning shallow groove 821, the ball 822, the first pressing spring 823, the button assembly 9 and the like are used more in the text, but the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the utility model; it is contrary to the spirit of the utility model to interpret them as any kind of additional limitation.

Claims

1. A chair armrest that is adjustable in the front and back and can rotate, comprising an armrest post (2) disposed at the upper end of an armrest mounting part (1), wherein an armrest body (3) having a front and back movable seat (31) is movably disposed at the upper end of the armrest post (2), and the front and back movable seat (31) and the armrest body (3) are movably connected by a front and back adjustment mounting mechanism (4), characterized in that, A rotating seat (5) is provided between the handrail column (2) and the handrail body (3). The upper end of the rotating seat (5) is fixedly connected to the front and rear movable seats (31) through the mounting and fixing mechanism (6). The lower end of the rotating seat (5) is circumferentially rotated and axially positioned with the upper end of the handrail column (2). The lower end face of the rotating seat (5) and the upper end face of the handrail column (2) are rotatably engaged through the inclined surface (7). A multi-position circumferential positioning mechanism (8) is provided between the handrail column (2) and the rotating seat (5) to enable the rotating seat (5) and the handrail column (2) to be circumferentially positioned.

2. The chair armrest that is adjustable in the front and back and can rotate according to claim 1, characterized in that, The mounting and fixing mechanism (6) includes a mounting seat (61) disposed on the upper end of the front and rear movable seats (31). The mounting seat (61) is connected to a fixing plate (63) located on the lower side of the handrail body (3) and fixedly disposed in the rotating seat (5) via a mounting and fixing component (62).

3. A chair armrest that is adjustable in the front and back and can rotate according to claim 2, characterized in that, The mounting and fixing assembly (62) includes insertion slots (621) located on the lower sides of both ends of the mounting base (61). The insertion slots (621) are inserted into the insertion plates (622) located in the front and rear movable seats (31). The fixing plate (63) is set in the opening at the upper end of the rotating seat (5) by fixing bolts. The fixing plate (63) has a fixing post (623) with a non-circular cross-section at the upper end. The fixing post (623) passes through the strip hole (624) on the lower side of the armrest body (3) and the notch (625) at the lower end of the front and rear movable seats (31) and is inserted into the fixing groove (626) at the lower center of the mounting base (61). The fixing post (623) and the fixing groove (626) are matched in shape. The fixing post (623) is fixedly connected to the mounting base (61) by mounting bolts (627).

4. A chair armrest that is adjustable in the front and back and can rotate according to claim 1, 2 or 3, characterized in that, The rotating seat (5) has a rotating groove (51) at the center of the inner side of the upper end. A rotating disk (52) is rotatably installed in the rotating groove (51). A positioning post (53) with a non-circular cross-section is located at the upper end of the handrail column (2). The positioning post (53) passes through the rotating seat (5) and is inserted into the center groove (54) at the lower end of the rotating disk (52). The positioning post (53) and the center groove (54) are matched in shape. The rotating disk (52) is fixedly connected to the positioning post (53) by a positioning bolt (55).

5. A chair armrest that is adjustable in the front and back and can rotate according to claim 4, characterized in that, The multi-position circumferential positioning mechanism (8) includes a circumferential positioning seat (81) set at the upper end of the handrail column (2), the circumferential positioning seat (81) is slidably set in the rotating groove (51) at the lower end of the rotating seat (5), and a multi-position circumferential positioning component (82) is provided between the circumferential positioning seat (81) and the rotating groove (51).

6. A chair armrest that is adjustable in the front and back and can rotate according to claim 5, characterized in that, The rotating groove (51) is arc-shaped and is located on the outer side of the positioning post (53) with the center of the positioning post (53) as the center. The angle of the rotating groove (51) is 180 degrees to 250 degrees.

7. A chair armrest that is adjustable in the front and back and can rotate according to claim 5, characterized in that, The multi-position circumferential positioning component (82) includes several positioning shallow grooves (821) arranged sequentially in the rotating groove (51). A ball (822) is movably provided on the inner side of the upper end of the circumferential positioning seat (81). The ball (822) protrudes from the positioning shallow groove (821) and abuts against any one of the positioning shallow grooves (821). A first top pressure spring (823) acting on the ball (822) is provided in the circumferential positioning seat (81).

8. A chair armrest that is adjustable in the front and back and can rotate according to claim 3, characterized in that, The handrail body (3) is formed by assembling the upper shell (32) and the lower shell (33) of the handrail. The strip hole (624) is set on the lower side of the lower shell (33). The front and rear adjustment installation mechanism (4) includes two guide plates (41) arranged axially and parallel to each other on the inner side of the lower shell (33). The front and rear movable seats (31) are slidably arranged between the two guide plates (41). One end of the guide plate (41) and the corresponding side are respectively provided with a number of arc grooves (42). The front and rear movable seats (31) are provided with positioning parts (43) that match the arc grooves (42) on both sides of one end. One end of the positioning part (43) abuts against any one of the arc grooves (42) and the other end is provided with a second top pressure spring (44).

9. A chair armrest that is adjustable in the front and back and can rotate according to claim 1, characterized in that, The inclined surface (7) includes a first inclined surface (71) provided on the lower end face of the rotating seat (5) and a second inclined surface (72) provided on the upper end of the handrail column (2). The first inclined surface (71) and the second inclined surface (72) are inclined in the same direction. The handrail column (2) and the rotating seat (5) are smoothly transitioned to each other through a curved surface (73).

10. A chair armrest that is adjustable in the front and back and can rotate according to claim 1, characterized in that, The handrail mounting part (1) is bent. One end of the handrail mounting part (1) has a connecting rod (11) that passes through the handrail column (2) and the other end has a plurality of handrail mounting holes (12). The connecting rod (11) and the handrail column (2) are axially slidably connected and the connecting rod (11) and the handrail column (2) are axially positioned by a button assembly (9) on the outside of the handrail column (2).

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