Armrest and seat with same

Abstract

The utility model discloses an armrest and a seat with the armrest. The armrest comprises a mounting seat, a front supporting seat and a rear supporting seat, a first gear is arranged on the front supporting seat, a second gear is arranged on the rear supporting seat, and the first gear is meshed with the second gear; the mounting seat is provided with a plurality of clamping portions, the front supporting seat is provided with a locking assembly, the locking assembly comprises a clamping piece movably mounted on the front supporting seat, an elastic piece and an operating portion, and the elastic piece is used for providing elastic stress for pushing the clamping piece towards the clamping portions so that the clamping piece can be clamped on one of the clamping portions. The operation part is used for driving the clamping part to move away from the clamping part so that the front supporting base can have the freedom degree of rotation relative to the installation base when the clamping part is separated from the clamping part. According to the utility model, the arms of a user can be prevented from sliding down, better support is provided for the arms of the user, and the comfort is prevented from being influenced by the friction force between the front support seat and the arms when the arms slide down.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to an armrest and a seat with the armrest. Background Art

[0002] Traditional seat armrests are fixedly arranged on both sides of the seat to support the user's hands. Due to their fixed position, they can only provide support for the user's hands in a fixed posture, resulting in poor comfort.

[0003] In order to meet the comfort requirements, some existing office chairs and gaming chairs have armrests movably installed on the sides of the seats so that the armrests can be flipped to adjust the angle of the armrest support surface. Although this can meet the different sitting posture requirements of users, when the armrests are used at a larger angle, the armrests do not provide sufficient support for the user's elbows, causing the user's hands to slide down, and the friction between the user's arm surface and the armrest surface will seriously affect comfort. Utility Model Content

[0004] The utility model aims to provide an armrest and a chair with the armrest, which can provide better support for the user's arms, especially when supporting the user's hands at a larger angle, providing better support for the user's elbows to improve comfort.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The armrest comprises a mounting seat, a front support seat pivotally connected to the front side of the mounting seat, and a rear support seat pivotally connected to the rear side of the mounting seat;

[0007] A first gear is arranged on the front support seat, and a second gear is arranged on the rear support seat, and the first gear and the second gear are meshed with each other so that the front support seat and the rear support seat can rotate relative to the mounting seat in opposite directions at the same time;

[0008] A plurality of locking parts are arranged on the mounting seat, and a locking assembly is arranged on the front support seat. The locking assembly includes a locking piece movably mounted on the front support seat, an elastic piece and an operating part. The elastic piece is used to provide an elastic stress, through which the locking piece is pushed toward the locking part so that the locking piece is locked on one of the locking parts and then locks the freedom of rotation of the front support seat relative to the mounting seat. The operating part is used to drive the locking piece to move away from the locking part so that the front support seat has the freedom of rotation relative to the mounting seat when the locking piece is separated from the locking part.

[0009] Preferably, a positioning seat is fixedly connected to the mounting seat, and the locking portion is a locking groove for inserting a locking piece, and a plurality of locking grooves are arranged on a side surface of the positioning seat facing the front support seat, and the plurality of locking grooves are arranged along an arc trajectory, and the center of the arc trajectory falls on the axis of relative rotation between the front support seat and the mounting seat.

[0010] Preferably, the locking member is a locking pin installed on the front support seat and capable of moving forward and backward, and the locking pin has one end facing the mounting seat forming a locking end that can be inserted into the locking groove; the locking assembly also includes a connecting rod, and the operating part is arranged below the front end of the front support seat, one end of the connecting rod is hinged to the locking pin, and the other end is connected to the operating part, and the elastic member is a spring arranged between the front support seat and the connecting rod, and the elastic stress provided by the spring pushes the connecting rod toward the mounting seat, so that the connecting rod pushes the locking pin toward the mounting seat.

[0011] Preferably, the front support seat is provided with a first slide groove extending in the front-to-back direction and a second slide groove extending in the front-to-back direction, the locking pin is slidably embedded in the first slide groove, and the connecting rod is slidably embedded in the second slide groove, and a first pressure block and a second pressure block are detachably fixed to the front support seat, the first pressure block is pressed on the locking pin to confine the locking pin in the first slide groove, and the connecting rod is provided with a slider slidably embedded in the second slide groove, one end of the spring abuts against the slider and the other end abuts against the front support seat, and the second pressure block is pressed on the connecting rod to confine the slider in the second slide groove.

[0012] Preferably, the operating part includes a pivot, a toggle part located on one side of the pivot and abutting against the connecting rod, and a button located on the other side of the pivot and extending beyond the front end bottom of the front support seat, and the pivot is rotatably connected to the front support seat.

[0013] Preferably, a horizontal limit surface is provided on the mounting seat, the rear end portion of the front support seat is placed above the horizontal limit surface and is pivotally connected to the mounting seat through a first rotating shaft, the front end portion of the rear support seat is placed above the horizontal limit surface and is pivotally connected to the mounting seat through a second rotating shaft, the first rotating shaft and the second rotating shaft are parallel to each other and staggered at a certain distance from each other; the horizontal limit surfaces respectively cooperate with the bottom surface of the front support seat and the bottom surface of the rear support seat to limit the maximum angle of downward swing of the front support seat and the rear support seat.

[0014] Preferably, the upper end of the positioning seat forms a limit end that cooperates with the locking pin. When the front support seat swings downward until its bottom surface cooperates with the horizontal limit surface of the mounting seat, the locking pin is placed above the limit end under the action of the elastic stress of the spring and forms a limit mechanism with the limit end to prevent the front support seat from swinging upward.

[0015] Preferably, the first gear includes a first connecting portion and a first tooth surface, the second gear includes a second connecting portion and a second tooth surface, and the first tooth surface and the second tooth surface are meshed with each other; a first mounting groove for the first connecting portion to be embedded is provided on the front support seat, the first mounting groove includes a first supporting bottom surface, and a first end surface extending upward from the front end of the first supporting bottom surface, the first connecting portion is sleeved on the first rotating shaft, and the first connecting portion includes two first mating surfaces that respectively abut against the first supporting bottom surface and the first end surface; a second mounting groove for the second connecting portion to be embedded is provided on the rear support seat, the second mounting groove includes a second supporting bottom surface, and a second end surface extending upward from the rear end of the second supporting bottom surface, the second connecting portion is sleeved on the second rotating shaft, and the second connecting portion includes two second mating surfaces that respectively abut against the second supporting bottom surface and the second end surface.

[0016] Preferably, the front support seat includes a first bottom plate, a first top plate fixed above the first bottom plate, and a locking assembly and a first gear are installed between the first bottom plate and the first top plate; the rear support seat includes a second bottom plate, a second top plate fixed above the second bottom plate, and the second gear is installed between the second bottom plate and the second top plate; an intermediate support seat located between the front support seat and the rear support seat is fixedly connected above the mounting seat; the upper surfaces of the first top plate, the second top plate, and the intermediate support seat are all covered with a layer of flexible support pad, and the upper surfaces of the three flexible support pads together constitute a support surface for supporting the user's arm.

[0017] The seat includes the aforementioned armrests.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] In the utility model, the front support seat and the rear support seat are both pivotally connected to the mounting seat, and the front support seat and the rear support seat can rotate simultaneously through the meshing of the first gear and the second gear. After the front support seat is flipped upward by a certain angle, the front support seat forms the main part supporting the user's arm, and the rear support seat supports the user's elbow at the rear side of the front support seat to prevent the user's arm from sliding downward, providing better support for the user's arm and avoiding the friction between the front support seat and the arm when the arm slides down to affect the comfort; in addition, the relative rotation freedom of the front support seat and the mounting seat is limited by the locking assembly, so that the front support seat can withstand a large downward force, preventing the front support seat from rotating abnormally downward when the arm presses down on the front support seat with a large force, thereby providing a more stable support for the user's arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the installation of the utility model;

[0022] Figure 3 It is a cross-sectional view of the utility model;

[0023] Figure 4 for Figure 3 Magnified view at A in the middle;

[0024] Figure 5 for Figure 2 Schematic diagram of the installation of the first gear and the second gear;

[0025] Figure 6 It is a schematic diagram of the use state of the utility model. DETAILED DESCRIPTION

[0026] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described. It should be noted that, under the premise of no conflict, the various embodiments described below or the various technical features can be arbitrarily combined to form a new embodiment. Except for special instructions, the materials and equipment used in this embodiment can be purchased from the market. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0027] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, "plurality" means two or more, unless otherwise precisely and specifically specified.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be connected through an intermediary medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] like Figure 1 , 2, 3, 4, 5, and 6 show an armrest of the utility model, which includes a mounting seat 30, a front support seat 10, and a rear support seat 20, wherein the front support seat 10 is pivoted to the front side of the mounting seat 30, and the rear support seat 20 is pivoted to the rear side of the mounting seat 30, and the front support seat 10 and the rear support seat 20 can rotate relative to the mounting seat 30 at the same time, and the directions of relative rotation of the two are always opposite. Specifically, a first gear 14 is provided on the front support seat 10, and a second gear 24 is provided on the rear support seat 20, and the first gear 14 and the second gear 24 are meshed, and when the user rotates the front support seat 10, the rear support seat 20 will swing relative to the mounting seat 30 at the same time. For example, when the front support seat 10 is rotated upward, the front end of the front support seat 10 swings upward, and the rear end of the rear support seat 20 swings upward, so that an angle less than 180° is formed between the front support seat 10 and the rear support seat 20; a plurality of latching parts are provided on the mounting seat 30, and a locking assembly is provided on the front support seat 10, the locking assembly includes a latching piece, a spring 44, and an operating part 43, the latching piece can cooperate with one of the latching parts to be mutually engaged, and when the latching piece is engaged with the latching part, the relative rotation freedom of the front support seat 10 and the mounting seat 30 can be limited, and when the latching piece rotates to different states with the front support seat 10, the latching piece and the mounting seat 30 are locked. The corresponding latching parts are latched, so that when the front support seat 10 is at different angles, the locking assembly can be used to cooperate with the latching part to lock the angular position of the front support seat 10; the latching piece is movably installed on the front support seat 10, and the spring 44 is used to push the latching piece so that the latching piece can always maintain the tendency to move toward the position where the latching part is combined. When no external force is applied to the latching piece, the elastic stress of the spring 44 can make the latching piece always combined with one of the latching parts, and then the locking assembly can always maintain the state of locking the relative rotational freedom of the front support seat 10 and the mounting seat 30. The operating part 43 is used to drive the latching piece to move so that the latching piece is away from the latch. The positioning portion moves, and after the locking piece is disengaged from the locking portion, the front support seat 10 has the freedom to rotate relative to the mounting seat 30. That is to say, when the front support seat 10 needs to be rotated to adjust the angle of the front support seat 10 relative to the mounting seat 30, the locking piece is disengaged from the locking portion by operating the operating portion 43, and the locking assembly is released from the relative rotational freedom of the front support seat 10 and the mounting seat 30. The front support seat 10 can be rotated by external force. While the front support seat 10 is rotated, the rear support seat 20 is rotated at the same time, so that the supporting part composed of the front support seat 10 and the rear support seat 20 for supporting the user's arm is deformed into the state required by the user.

[0030] In the present invention, the front support seat 10 and the rear support seat 20 are both pivotally connected to the mounting seat 30, and the front support seat 10 and the rear support seat 20 are able to rotate simultaneously through the meshing of the first gear 14 and the second gear 24. After the front support seat 10 is flipped upward by a certain angle, the front support seat 10 forms the main part of supporting the user's arm, and the rear support seat 20 supports the user's elbow at the rear side of the front support seat 10 to prevent the user's arm from sliding downward, providing better support for the user's arm and avoiding the friction between the front support seat 10 and the arm when the arm slides down to affect the comfort; in addition, the front support seat 10 and the mounting seat 30 are limited in their relative rotation freedom by the locking assembly, so that the front support seat 10 can withstand a large downward pressure to prevent the front support seat 10 from rotating abnormally downward when the arm presses down on the front support seat 10 with a large force, thereby providing a relatively stable support for the user's arm.

[0031] See also Figure 2 , 4 As shown, in a preferred embodiment, the front support seat 10 can be pivotally connected to the mounting seat 30 through a first rotating shaft 101, and the rear support seat 20 can be pivotally connected to the mounting seat 30 through a second rotating shaft 201; a positioning seat 50 is fixedly connected to the mounting seat 30, and a locking portion is arranged on the positioning seat 50. Specifically, the plurality of locking portions are a plurality of locking grooves 51 arranged on the positioning seat 50, and the plurality of locking grooves 51 are arranged on a side surface of the positioning seat 50 facing the front support seat 10, and the plurality of locking grooves 51 are arranged along an arc track, and the arc track is arranged along the front support seat 10. The center of the circle of the shaped trajectory falls on the central axis of the above-mentioned first rotating shaft 101; specifically, the side of the positioning seat 50 facing the front supporting seat 10 can be set to an arc, the center of the arc falls on the central axis of the first rotating shaft 101, and then a plurality of locking grooves 51 are arranged from top to bottom on the arc surface; the locking groove 51 can be inserted into the locking member, and the locking member can only move in the front and rear directions of the front supporting seat 10, so that after the locking member is inserted into the locking groove 51, the freedom of relative rotation between the front supporting seat 10 and the mounting seat 30 can be locked.

[0032] See also Figure 2 , 3 4. The locking member is a locking pin 42 that can only move forward and backward on the front support seat 10. The locking pin 42 forms a locking end 421 at one end facing the mounting seat 30. The shape and size of the locking end 421 can just enable the locking end 421 to be inserted into the locking groove 51. When the operating part 43 drives the locking end 421 to a state of being disengaged from the locking groove 51, the front support seat 10 is rotated, and the locking end 421 rotates with the front support seat 10. By arranging the locking groove 51 along an arc trajectory, it is avoided that the locking end 421 interferes with the positioning seat 50 when the front support seat 10 rotates relative to the mounting seat 30. At the same time, when the external force on the operating part 43 is released, the locking end 421 can be quickly embedded in the locking groove 51.

[0033] In order to facilitate operation, the locking assembly further includes a connecting rod 41, an operating portion 43 is arranged below the front end of the front support seat 10, the rear end of the connecting rod 41 is hinged to the locking pin 42, and the front end is connected to the operating portion 43, and a spring 44 is arranged between the front support seat 10 and the connecting rod 41. The elastic stress provided by the spring 44 is used to push the connecting rod 41 toward the mounting seat 30, so that the connecting rod 41 can always push the locking pin 42 toward the mounting seat 30, so that the clamping end 421 on the locking pin 42 can be stably inserted into the clamping groove 51. Since the operating portion 43 is arranged below the front end of the front support seat 10, after the user's arm is placed on the front support seat 10, the fingers can operate the operating portion 43 downward, which improves the convenience of using the armrest. The operating portion 43 and the locking pin 42 are connected by the connecting rod 41, so that the locking assembly can adapt to the length of the front support seat 10.

[0034] In order to facilitate the installation of the locking assembly, a first slide groove 111 extending in the front-to-back direction and a second slide groove 112 extending in the front-to-back direction are provided on the front support seat 10. Openings are provided at both ends and the top of the first slide groove 111. The lock pin 42 is slidably embedded in the first slide groove 111. A first pressing block 46 is fixed on the front support seat 10 by screws or other detachable fixing methods. The first pressing block 46 is pressed above the lock pin 42, thereby limiting the lock pin 42 in the first slide groove 111, so that the lock pin 42 only has a front-to-back direction relative to the front support seat 10. 0 sliding freedom; a slider 411 slidably embedded in the second slide groove 112 is provided on the connecting rod 41, the front end of the spring 44 abuts on the front support seat 10, and the rear end abuts on the slider 411, and a second pressure block 45 is fixed to the front support seat 10 by screws or other detachable fixing methods. The second pressure block 45 is pressed on the connecting rod 41 to confine the slider 411 in the second slide groove 112, so that the locking pin 42 and the connecting rod 41 can only slide in the front and rear directions relative to the front support seat 10, and it is convenient to install the locking assembly on the front support seat 10.

[0035] The operating portion 43 of the utility model includes a pivot 433, a toggle portion 432 located on one side of the pivot 433, and a button 431 located on the other side of the pivot 433, wherein the pivot 433 is rotatably connected to the front support seat 10, the toggle portion 432 abuts against the connecting rod 41, and the button 431 extends out of the front end bottom of the front support seat 10 and protrudes from the lower surface of the front support seat 10. When the front support seat 10 needs to be rotated, the button 431 can be pressed upward. After the operating portion 43 is rotated, the toggle portion 432 pushes the connecting rod 41 forward, and then the connecting rod 41 drives the locking pin 42 to move forward, and the clamping end 421 on the locking pin 42 disengages from the clamping groove 51; when the pressing force on the button 431 is released, the locking pin 42 moves backward and resets due to the elastic stress of the spring 44. The axial hole on the front support seat 10 for installing the pivot 433 is surrounded by the front support seat 10 and the above-mentioned second pressing block 45. During installation, the pivot 433 is placed in a groove with a preset upper opening on the front support seat 10, and then the second pressing block 45 is fixed to the front support seat 10 so that the second pressing block 45 covers the upper opening of the groove to prevent the pivot 433 from detaching from the front support seat 10.

[0036] A horizontal limiting surface 301 is provided on the mounting seat 30, the rear end of the front support seat 10 is placed above the horizontal limiting surface 301 and is pivotally connected to the mounting seat 30 through the first rotating shaft 101, the front end of the rear support seat 20 is placed above the horizontal limiting surface 301 and is pivotally connected to the mounting seat 30 through the second rotating shaft 201, the horizontal limiting surface 301 cooperates with the bottom surface 102 of the front support seat 10 to limit the maximum angle of the front support seat 10 to swing downward, and the horizontal limiting surface 301 cooperates with the bottom surface 102 of the front support seat 10 to limit the maximum angle of the front support seat 10 to swing downward. The bottom surface 202 of the seat 20 cooperates to limit the maximum angle of the rear support seat 20 to swing downward, that is, when the bottom surface 102 of the front support seat 10 is in contact with the horizontal limit surface 301, the horizontal limit surface 301 prevents the front support seat 10 from continuing to swing downward. Similarly, when the bottom surface 202 of the rear support seat 20 is in contact with the horizontal limit surface 301, the horizontal limit surface 301 prevents the front support seat 10 from continuing to swing downward. At this time, the front support seat 10 and the rear support seat 20 of the armrest are in the following Figure 3 When the locking end 421 of the locking pin 42 cooperates with the lowermost card slot 51, the front support seat 10 is in a state of swinging upward to the maximum angle, and the rear support seat 20 is also in a state of swinging upward to the maximum angle, that is, Figure 6 Status shown.

[0037] In the present invention, a limit end 52 matching the locking pin 42 is formed at the upper end of the positioning seat 50. When the front support seat 10 swings downward to the maximum angle (such as Figure 3In the state shown in the figure, the bottom surface 102 of the front support seat 10 is fitted with the horizontal limit surface 301. At this time, the locking pin 42 rotates with the front support seat 10 to a position higher than the positioning seat 50, and the locking pin 42 is placed above the limit end 52 under the elastic stress of the spring 44. At this time, the locking pin 42 and the limit end 52 form a limit mechanism, which is used to prevent the front support seat 10 from swinging upward relative to the mounting seat 30. That is to say, when the armrest is in the state shown in the figure, the bottom surface 102 of the front support seat 10 is fitted with the horizontal limit surface 301. At this time, the locking pin 42 rotates with the front support seat 10 to a position higher than the positioning seat 50, and the locking pin 42 is placed above the limit end 52 under the elastic stress of the spring 44. At this time, the locking pin 42 and the limit end 52 form a limit mechanism, which is used to prevent the front support seat 10 from swinging upward relative to the mounting seat 30. Figure 3 In the state shown, the front support seat 10 will not swing upward when subjected to an upward external force, thereby preventing the front support seat 10 from shaking. Only after pressing the button 431 and pulling the locking pin 42 forward by the connecting rod 41 so that the locking pin 42 is offset from the limit end 52, can the front support seat 10 be swung upward to adjust the angle of the front support seat 10.

[0038] See also Figure 5 As shown, the first gear 14 includes a first connecting portion 142 and a first tooth surface 141, and the second gear 24 includes a second connecting portion 242 and a second tooth surface 241, and the first tooth surface 141 meshes with the second tooth surface 241. A first mounting groove 113 is provided on the front support seat 10, and the first mounting groove 113 includes a first support bottom surface 1131 and a first end surface 1132 extending upward from the front end of the first support bottom surface 1131. The first connecting portion 142 is sleeved on the first rotating shaft 101, and the first connecting portion 142 has two intersecting first matching surfaces, and the two first matching surfaces are respectively in contact with the first support bottom surface 1131 and the first end surface 1132, so that the first gear 14 is fixed to the front support seat 10. A second mounting groove 211 is provided on the rear support seat 20, and the second mounting groove 211 includes a second supporting bottom surface 2111 and a second end surface 2112 extending upward from the rear end of the second supporting bottom surface 2111. The second connecting portion 242 is sleeved on the second rotating shaft 201, and the second connecting portion 242 has two intersecting second mating surfaces, and the two second mating surfaces are respectively abutted against the second supporting bottom surface 2111 and the second end surface 2112, so that the second gear 24 is fixed to the rear support seat 20.

[0039] See also Figure 2 , 3As shown, the front support seat 10 of the utility model includes a first bottom plate 11 and a first top plate 12, the first top plate 12 is fixedly connected to the top of the first bottom plate 11, and the above-mentioned locking assembly and the first gear 14 are installed in the chamber surrounded by the first bottom plate 11 and the first top plate 12. The locking assembly and the first gear 14 can be installed on the upper surface of the first bottom plate 11, and the first top plate 12 is used to cover and protect the locking assembly and the first gear 14; the rear support seat 20 includes a second bottom plate 21 and a second top plate 22, the second top plate 22 is fixed to the top of the second bottom plate 21, and the second gear 24 is located between the second top plate 22 and the second bottom plate 21; an intermediate support seat 60 is fixedly connected above the mounting seat 30, and the intermediate support seat 60 is located between the front support seat 10 and the rear support seat 20. When the armrest is deformed to the position shown in FIG. Figure 3 In the state shown, the front support seat 10 and the rear support seat 20 are in a horizontal state, and the intermediate support seat 60 is located between the front support seat 10 and the rear support seat 20, and together with the front support seat 10 and the rear support seat 20, it forms a flat support portion. Figure 6 In the state shown, the middle support seat 60 fills the gap between the front support seat 10 and the rear support seat 20 at the lower part of the front support seat 10 and the rear support seat 20 to prevent the user's elbow from being stuck in the gap below the front support seat 10 and the rear support seat 20.

[0040] The upper surface of the first top plate 12 is covered with a flexible support pad 13, the upper surface of the second top plate 22 is covered with a flexible support pad 23, and the upper surface of the intermediate support seat 60 is covered with a flexible support pad 61. The flexible support pad 13, the flexible support pad 23, and the flexible support pad 61 together form a support surface for supporting the user's arm. The above-mentioned flexible support pad is made of flexible materials such as leather, cotton cloth, sponge, etc. that are suitable for contact with the user's arm, thereby improving the comfort of the armrest.

[0041] It should be particularly pointed out that the above-mentioned first rotating shaft 101 and second rotating shaft 201 of the utility model are staggered at a certain distance from each other, so that sufficient space is reserved between the front support seat 10 and the rear support seat 20, so that the first gear 14 and the second gear 24 can be combined with each other, thereby ensuring that the front support seat 10 and the rear support seat 20 can rotate at the same time; in fact, in other embodiments, the first rotating shaft 101 and the second rotating shaft 201 can also be arranged to overlap, that is, the front support seat 10 and the rear support seat 20 are pivotally connected on the same rotating shaft.

[0042] In addition, the spring 44 mentioned above can also be replaced by other elastic members, for example, the elastic member can be an elastic rubber block, a tension spring, etc. installed between the connecting rod 41 and the front support seat 10.

[0043] The seat of the utility model comprises the above-mentioned armrests, and other structures of the seat are the same as those in the prior art, which will not be described in detail here.

[0044] Finally, it should be noted that the above-mentioned implementation modes are only optional embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An armrest, characterized in that: It includes a mounting seat, a front support seat pivotally connected to the front side of the mounting seat, and a rear support seat pivotally connected to the rear side of the mounting seat; A first gear is arranged on the front support seat, and a second gear is arranged on the rear support seat, and the first gear and the second gear are meshed with each other so that the front support seat and the rear support seat can rotate relative to the mounting seat in opposite directions at the same time; A plurality of locking parts are arranged on the mounting seat, and a locking assembly is arranged on the front support seat. The locking assembly includes a locking piece movably mounted on the front support seat, an elastic piece and an operating part. The elastic piece is used to provide an elastic stress, through which the locking piece is pushed toward the locking part so that the locking piece is locked on one of the locking parts and then locks the freedom of rotation of the front support seat relative to the mounting seat. The operating part is used to drive the locking piece to move away from the locking part so that the front support seat has the freedom of rotation relative to the mounting seat when the locking piece is separated from the locking part.

2. The handrail according to claim 1, characterized in that: A positioning seat is fixedly connected to the mounting seat, and the locking portion is a locking groove for inserting a locking piece. A plurality of locking grooves are arranged on a side surface of the positioning seat facing the front supporting seat. The plurality of locking grooves are arranged along an arc trajectory, and the center of the arc trajectory falls on the axis of relative rotation between the front supporting seat and the mounting seat.

3. The handrail according to claim 2, characterized in that: The locking member is a locking pin installed on the front support seat and can move forward and backward, and the end of the locking pin facing the mounting seat forms a locking end that can be inserted into the locking groove; the locking assembly also includes a connecting rod, and the operating part is arranged below the front end of the front support seat, one end of the connecting rod is hinged to the locking pin, and the other end is connected to the operating part, and the elastic member is a spring arranged between the front support seat and the connecting rod, and the elastic stress provided by the spring pushes the connecting rod toward the mounting seat, so that the connecting rod pushes the locking pin toward the mounting seat.

4. The handrail according to claim 3, characterized in that: The front support seat is provided with a first slide groove extending in the front-to-back direction and a second slide groove extending in the front-to-back direction, the locking pin is slidably embedded in the first slide groove, and the connecting rod is slidably embedded in the second slide groove, and a first pressure block and a second pressure block are detachably fixed on the front support seat, the first pressure block is pressed on the locking pin to confine the locking pin in the first slide groove, and a sliding block is provided on the connecting rod to slide and embed in the second slide groove, one end of the spring abuts on the sliding block and the other end abuts on the front support seat, and the second pressure block is pressed on the connecting rod to confine the sliding block in the second slide groove.

5. The handrail according to claim 3, characterized in that: The operating part comprises a pivot, a toggle part located at one side of the pivot and abutting against the connecting rod, and a button located at the other side of the pivot and extending beyond the front end bottom of the front supporting seat. The pivot is rotatably connected to the front supporting seat.

6. The handrail according to claim 3, characterized in that: A horizontal limiting surface is arranged on the mounting seat, the rear end portion of the front supporting seat is placed above the horizontal limiting surface and is pivotally connected to the mounting seat through a first rotating shaft, the front end portion of the rear supporting seat is placed above the horizontal limiting surface and is pivotally connected to the mounting seat through a second rotating shaft, the first rotating shaft and the second rotating shaft are parallel to each other and are staggered at a certain distance from each other; the horizontal limiting surfaces are respectively matched with the bottom surfaces of the front supporting seat and the bottom surfaces of the rear supporting seat to limit the maximum downward swinging angles of the front supporting seat and the rear supporting seat.

7. The handrail according to claim 6, characterized in that: The upper end of the positioning seat forms a limit end that cooperates with the locking pin. When the front support seat swings downward until its bottom surface cooperates with the horizontal limit surface of the mounting seat, the locking pin is placed above the limit end under the elastic stress of the spring and forms a limit mechanism with the limit end to prevent the front support seat from swinging upward.

8. The handrail according to claim 6, characterized in that: The first gear includes a first connecting portion and a first tooth surface, the second gear includes a second connecting portion and a second tooth surface, and the first tooth surface and the second tooth surface are meshed with each other; a first mounting groove for the first connecting portion to be embedded is provided on the front support seat, the first mounting groove includes a first supporting bottom surface, and a first end surface extending upward from the front end of the first supporting bottom surface, the first connecting portion is sleeved on the first rotating shaft, and the first connecting portion includes two first mating surfaces that respectively abut against the first supporting bottom surface and the first end surface; a second mounting groove for the second connecting portion to be embedded is provided on the rear support seat, the second mounting groove includes a second supporting bottom surface, and a second end surface extending upward from the rear end of the second supporting bottom surface, the second connecting portion is sleeved on the second rotating shaft, and the second connecting portion includes two second mating surfaces that respectively abut against the second supporting bottom surface and the second end surface.

9. The handrail according to claim 1, characterized in that: The front support seat includes a first bottom plate, a first top plate fixed above the first bottom plate, and a locking assembly and a first gear are installed between the first bottom plate and the first top plate; the rear support seat includes a second bottom plate, a second top plate fixed above the second bottom plate, and the second gear is installed between the second bottom plate and the second top plate; an intermediate support seat located between the front support seat and the rear support seat is fixedly connected above the mounting seat; the upper surfaces of the first top plate, the second top plate, and the intermediate support seat are all covered with a layer of flexible support pad, and the upper surfaces of the three flexible support pads together constitute a support surface for supporting the user's arm.

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

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