Armrest assembly and seat

Abstract

The application discloses a handrail assembly, which comprises a handrail body, a handrail rotating shaft, a handrail extension assembly, a handrail retraction assembly and a linkage assembly. The handrail body is rotatably connected around the handrail rotating shaft. The handrail extension assembly is connected with the linkage assembly, the linkage assembly is connected with the handrail body, and the handrail retraction assembly is connected with the handrail body. The handrail assembly comprises at least an extension state and a retraction state. In the extension state, the handrail extension assembly drives the linkage assembly, the linkage assembly is connected with the handrail retraction assembly, and the linkage assembly simultaneously pushes the handrail body to extend outward. In the retraction state, the handrail retraction assembly moves to be separated from the linkage assembly, and the linkage assembly drives the handrail body to retract. The application also discloses a seat. The handrail body can be retracted and hidden at the side of a back cushion when not in use, the overall beauty of the seat is improved, the handrail body does not occupy the space of a central aisle, and interference between the handrail body and a central handrail is prevented.

Description

Technical Field

[0001] This invention relates to the technical field of seating, and more particularly to an armrest assembly and a seat. Background Technology

[0002] In existing three-row vehicle models, the second-row seats are usually equipped with armrests, which has the following problems:

[0003] 1. When the second row has two seats and both have armrests, the armrests encroach on the central aisle space, affecting the passage of passengers to and from the third row;

[0004] 2. When the center armrest of the front row needs to slide to the second row, the armrest interferes with the center armrest;

[0005] 3. The lucky cat-style armrests commonly used in chairs affect the chair's design. These armrests are located on the outer side of the chair back and can be lowered or folded up by rotating. This type of armrest disrupts the overall aesthetic and reduces the sense of luxury.

[0006] Therefore, it is necessary to design an armrest assembly and seat that can be hidden behind the seat cushion when the armrest is not in use. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide an armrest assembly and seat in which the armrest can be hidden behind the seat cushion when not in use.

[0008] The present invention provides a handrail assembly, including a handrail body and a handrail pivot, wherein the handrail body is rotatably connected around the handrail pivot, and further includes a handrail extension component, a handrail retraction component and a linkage component, wherein the handrail extension component is connected to the linkage component, the linkage component is connected to the handrail body, and the handrail retraction component is connected to the handrail body;

[0009] The armrest assembly includes at least an extended state and a retracted state:

[0010] When in the extended state, the handrail extension component drives the linkage component, the linkage component is connected to the handrail retraction component, and the linkage component simultaneously pushes the handrail body to extend outward;

[0011] In the retracted state, the handrail retraction component moves to separate from the linkage component, and the linkage component drives the handrail body to retract.

[0012] Furthermore, the handrail extension assembly includes a buckle and a first cable, the first cable connecting the buckle and the linkage assembly.

[0013] Furthermore, the handrail retraction assembly includes a handrail turntable, a push nut, a drive wheel, a second cable, and a linkage component. The handrail turntable is fixedly connected to the handrail body, the push nut is fixedly installed on the handrail turntable, and the drive wheel is sleeved on the handrail shaft.

[0014] When the handrail body rotates in the first direction during the retracted state, it drives the handrail turntable to rotate. After the push nut contacts the drive wheel, it pushes the drive wheel to rotate. The drive wheel pulls the second cable, and the second cable pulls the linkage to separate from the linkage assembly.

[0015] Furthermore, a drive wheel return spring is installed on the drive wheel. When the handrail body rotates in the first direction and the handrail body is released, the drive wheel return spring drives the drive wheel to return to its original position. The drive wheel pushes the push nut in the opposite direction and drives the handrail turntable and the handrail body to return to their original positions.

[0016] Furthermore, the armrest retraction assembly includes a motor, a transmission wheel, and a linkage component; in the extended state, the motor drives the transmission wheel, and the transmission wheel drives the linkage component to separate from the linkage assembly.

[0017] Furthermore, the linkage component is a ratchet pawl;

[0018] The linkage component includes a ratchet, a cam, a connecting rod, and a slider. The ratchet is connected to the handrail extension component, the ratchet is connected to the cam, the connecting rod is connected between the cam and the slider, and the slider is connected to the handrail body.

[0019] In the extended state, the handrail extension assembly drives the ratchet to rotate and connect with the pawl. The ratchet simultaneously drives the cam to rotate, the cam drives the connecting rod to extend, the connecting rod drives the slider to extend, and the slider drives the handrail body to extend.

[0020] In the retracted state, the pawl separates from the ratchet, the ratchet's retaining spring causes the ratchet to rotate in the opposite direction, the ratchet causes the cam to rotate in the opposite direction, the cam causes the connecting rod to retract, and the connecting rod causes the handrail body to retract.

[0021] Furthermore, the ratchet is provided with multiple consecutive teeth.

[0022] Furthermore, the ratchet is provided with multiple ratchet teeth at intervals.

[0023] The present invention also provides a seat, including a backrest and a seat cushion, and further including the armrest assembly described in any of the above claims, wherein armrest receiving grooves are provided on both the left and right sides of the backrest;

[0024] In the retracted state, the armrest body retracts into the armrest receiving slot, and the outer side of the armrest body is flush with the left and right sides of the cushion.

[0025] When extended, the handrail body extends out of the handrail receiving slot.

[0026] Furthermore, the armrest extension assembly includes a buckle and a first cable, the first cable connecting the buckle and the linkage assembly, the buckle extending from the upper surface of the cushion, and the first cable installed inside the cushion.

[0027] The above technical solution has the following beneficial effects:

[0028] This invention achieves the switching between the extended and retracted states of the armrest body through an armrest extension component, an armrest retraction component, and a linkage component. When the armrest body is not in use, it can be retracted and hidden in the side of the backrest, which increases the overall aesthetics of the seat and avoids the armrest body occupying the space of the central aisle, thus preventing the armrest body from interfering with the central armrest. Attached Figure Description

[0029] The disclosure of this invention will become more readily understood by referring to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings:

[0030] Figure 1 This is a schematic diagram of the armrest assembly in an extended state mounted on the seat according to an embodiment of the present invention;

[0031] Figure 2 This is an internal structural diagram of the armrest assembly in its extended state according to an embodiment of the present invention;

[0032] Figure 3 This is an exploded view of the handrail assembly in one embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the linkage component in the extended state according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the armrest assembly being mounted on the seat and rotating forward in one embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the armrest retraction assembly rotating forward in one embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the armrest assembly being mounted on the seat and rotated backward in one embodiment of the present invention;

[0037] Figure 8This is a schematic diagram of the armrest retraction assembly rotating backward in one embodiment of the present invention;

[0038] Figure 9 This is a schematic diagram of the linkage component rotating backward in one embodiment of the present invention;

[0039] Figure 10 This is a schematic diagram of the armrest assembly in its retracted state when mounted on the seat, according to one embodiment of the present invention.

[0040] Figure 11 This is a schematic diagram of the linkage component in the retracted state in one embodiment of the present invention;

[0041] Figure 12 This is a schematic diagram of the internal structure of the armrest assembly in another embodiment of the present invention;

[0042] Figure 13 This is a schematic diagram of the internal structure of the armrest assembly in another embodiment of the present invention;

[0043] Figure 14 This is a schematic diagram of the internal structure of the armrest assembly in another embodiment of the present invention;

[0044] Figure 15 yes Figure 14 A schematic diagram of the internal structure of the handrail assembly in a modified example.

[0045] Reference table for attached figures:

[0046] Handrail body 1;

[0047] Handrail pivot 2: pivot cover 21, pivot rod 22, limit sleeve 23;

[0048] Handrail extension component 3: handle 31, first cable 32;

[0049] Handrail retraction assembly 4: handrail turntable 41, push nut 42, drive wheel 43, second cable 44, pawl 45, motor 46, transmission wheel 47, fixing bracket 48, mounting plate 49;

[0050] Linkage component 5: ratchet 51, cam 52, connecting rod 53, slider 54, gear 55, motor 56;

[0051] 10 cushion, 20 seat cushion, 101 armrest storage slot, 102 inner cushion panel. Detailed Implementation

[0052] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0053] It is readily understood that, based on the technical solution of this invention, various structural and implementation methods can be interchanged by those skilled in the art without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of the invention.

[0054] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0055] In some embodiments of the present invention, such as Figure 1-2 As shown, the handrail assembly includes a handrail body 1 and a handrail pivot 2. The handrail body 1 is rotatably connected around the handrail pivot 2. It also includes a handrail extension component 3, a handrail retraction component 4, and a linkage component 5. The handrail extension component 3 is connected to the linkage component 5, the linkage component 5 is connected to the handrail body 1, and the handrail retraction component 4 is connected to the handrail body 1.

[0056] The armrest assembly includes at least an extended state and a retracted state:

[0057] When extended, the handrail extension component 3 drives the linkage component 5, which is connected to the handrail retraction component 4. The linkage component 5 simultaneously pushes the handrail body 1 to extend outward.

[0058] When in the retracted state, the handrail retraction component 4 moves to separate from the linkage component 5, and the linkage component 5 drives the handrail body 1 to retract.

[0059] Specifically, such as Figure 1 As shown, the armrest assembly can be installed on the left and right sides of the seat cushion 10, and extends and retracts relative to the cushion 10 in the left and right directions. When the armrest body 1 is needed, it is switched to the extended state; when the armrest body 1 is not in use, it is switched to the retracted state. The armrest body 1 can be completely retracted to the left and right sides of the cushion 10, forming a whole with the cushion 10, making the overall integrity of the seat stronger and increasing its aesthetics. It also prevents the armrest body 1 from occupying the space of the central aisle and prevents the armrest body 1 from interfering with the central armrest.

[0060] like Figure 1-2 As shown, the armrest assembly includes an armrest body 1 and an armrest pivot 2, with the armrest body 1 rotatably connected around the armrest pivot 2. When the armrest body 1 is needed, it is rotated towards the front of the seat. When the armrest body 1 is not needed, it is rotated towards the rear of the seat.

[0061] like Figure 2 As shown, the handrail assembly also includes a handrail extension component 3, a handrail retraction component 4, and a linkage component 5. The handrail extension component 3 is connected to the linkage component 5, the linkage component 5 is connected to the handrail body 1, and the handrail retraction component 4 is connected to the handrail body 1.

[0062] When extended, the armrest extension component 3 drives the linkage component 5, which is connected to the armrest retraction component 4. The linkage component 5 simultaneously pushes the armrest body 1 to extend outward. At least a portion of the armrest extension component 3, the armrest retraction component 4, and the linkage component 5 are mounted on the inner cushion plate 102 of the backrest 10.

[0063] In the retracted state, the handrail retraction component 4 moves to separate from the linkage component 5, and the linkage component 5 drives the handrail body 1 to retract. The handrail retraction component 4 can be driven manually or electrically.

[0064] Furthermore, such as Figure 2 As shown, the handrail extension component 3 includes a handle 31 and a first cable 32, which connects the handle 31 and the linkage component 5.

[0065] Specifically, the handle 31 is located on the seat in a position convenient for the user to operate. When it is necessary to extend the armrest body 1, the user operates the handle 31, the handle 31 pulls the first cable 32, the first cable 32 drives the linkage component 5 to move, so that the linkage component 5 connects with the armrest retraction component 4, and at the same time pushes the armrest body 1 to extend outward.

[0066] Optionally, the handrail extension assembly 3 may not include the handle 3 or the first cable 32, but instead drive the linkage assembly 5 by a motor. The handrail extension assembly 3 is connected to the central control unit. After receiving the handrail extension command, the central control unit controls the movement of the handrail extension assembly 3, thereby driving the movement of the linkage assembly 5.

[0067] Furthermore, such as Figure 3 and Figure 8 As shown, the handrail retraction assembly 4 includes a handrail turntable 41, a push nut 42, a drive wheel 43, a second cable 44, and a linkage component. The handrail turntable 41 is fixedly connected to the handrail body 1, the push nut 42 is fixedly installed on the handrail turntable 41, and the drive wheel 43 is sleeved on the handrail shaft 2.

[0068] When the handrail body 1 is in the retracted state, it rotates in the first direction, which drives the handrail turntable 41 to rotate. After the nut 42 contacts the drive wheel 43, it drives the drive wheel 43 to rotate. The drive wheel 43 pulls the second cable 44, and the second cable 44 pulls the linkage component to separate from the linkage assembly 5.

[0069] Specifically, such as Figure 3 As shown, the handrail retraction assembly 4 also includes a fixing frame 48 and a mounting plate 49. The fixing frame 48 is fixedly connected inside the handrail body 1, and the handrail turntable 41 is connected to the fixing frame 48. The shaft 22 of the handrail pivot 2 passes through the fixing frame 48, the handrail turntable 41, the drive wheel 42, and the mounting plate 49 in sequence. The shaft cover 21 of the handrail pivot 2 is connected to one end of the shaft 22, and the limiting sleeve 23 of the handrail pivot 2 is connected to the other end of the shaft 22 to limit the shaft 22. The mounting plate 49 is fixedly connected to the slider 54 of the linkage assembly 5.

[0070] like Figure 7-8 In the retracted state, the armrest body 1 rotates towards the rear of the seat (i.e., in the first direction), and the armrest body 1 drives the armrest turntable 41 along... Figure 8 The black arrow points in the direction of rotation. The handrail turntable 41 drives the push nut 42 to rotate synchronously. After the push nut 42 rotates to contact the drive wheel 43, it pushes the drive wheel 43 to rotate. The drive wheel 43 pulls the second cable 44, and the second cable 44 causes the linkage to separate from the linkage assembly 5.

[0071] like Figure 9 As shown, in this embodiment, the linkage component is a pawl 45. The second cable 44 drives the pawl 45 to separate from the linkage component 5, and the linkage component 5 drives the armrest body 1 to retract to the side of the cushion 10.

[0072] Preferably, a drive wheel return spring (not shown) is installed on the drive wheel 43. When the handrail body 1 rotates in the first direction and the handrail body 1 is released, the drive wheel return spring drives the drive wheel 43 to return to its original position. The drive wheel 43 pushes the push nut 42 in the opposite direction, and drives the handrail turntable 41 and the handrail body 1 to return to their original positions, so that the handrail body 1 returns to its original position. Figure 10 At this position, the armrest body 1 retracts towards the backrest 10 and enters the armrest receiving slots 101 on the left and right sides of the backrest 10, forming a whole with the backrest 10.

[0073] Furthermore, such as Figure 4 As shown, the linkage component 5 includes a ratchet 51, a cam 52, a connecting rod 53 and a slider 54. The ratchet 51 is connected to the handrail extension component 3, the ratchet 51 is connected to the cam 52, the connecting rod 53 is connected between the cam 52 and the slider 54, and the slider 54 is connected to the handrail body 1.

[0074] When extended, the handrail extension assembly 3 drives the ratchet 51 to rotate and connect with the pawl 45. The ratchet 51 simultaneously drives the cam 52 to rotate. The cam 52 drives the connecting rod 53 to extend. The connecting rod 53 drives the slider 54 to extend. The slider 54 drives the handrail body 1 to extend.

[0075] When retracted, the pawl 45 separates from the ratchet 51, the ratchet 51's retaining spring causes the ratchet 51 to rotate in the opposite direction, the ratchet 51 causes the cam 52 to rotate in the opposite direction, the cam 52 causes the connecting rod 53 to retract, and the connecting rod 53 causes the handrail body 1 to retract.

[0076] Specifically, such as Figure 4 As shown, in the extended state, ratchet 51 is connected to the first cable 32, and the first cable 32 can drive ratchet 51 along... Figure 4 After rotating counterclockwise, it connects with pawl 45.

[0077] Ratchet 51 is connected to cam 52 via gear 55. When ratchet 51 rotates counterclockwise, it drives gear 55 to rotate counterclockwise as well. Gear 55 drives cam 52 to rotate clockwise, and gear 52 moves connecting rod 53 toward... Figure 4 Pushing to the left, the connecting rod 53 pushes the slider 54 to the left, and the slider 54 causes the handrail body 1 to extend outward.

[0078] like Figure 9 As shown, in the retracted state, the second cable 44 drives the pawl 45 to... Figure 9 The leftward movement causes the pawl 45 to separate from the ratchet 51, and the retaining spring of the ratchet 51 drives the ratchet 51 along... Figure 9 Rotating clockwise, ratchet 51 drives gear 55 to rotate clockwise in the opposite direction, and gear 55 drives cam 52 to rotate clockwise along... Figure 9 The cam rotates counterclockwise, causing the connecting rod 53 to move to the right, which in turn causes the armrest body 1 to move to the right.

[0079] In a preferred embodiment of the present invention, the armrest assembly is used as follows:

[0080] like Figure 1-2 As shown, when the handrail body 1 needs to be used, the user manually operates the handle 31, which drives the first cable 32, and the first cable 32 drives the ratchet 51 of the linkage component 5.

[0081] like Figure 4 As shown, after the ratchet 51 rotates counterclockwise, it connects with the pawl 45. Simultaneously, the ratchet 51 drives the cam 52 to rotate clockwise. The cam 52 pushes out the connecting rod 53, which in turn pushes out the slider 54. The slider 54 causes the handrail body 1 to extend outwards. The extended handrail body 1 is... Figure 1 The state.

[0082] like Figure 5 As shown, the user then manually flips the handrail body 1 forward and downward, rotating it to a roughly horizontal position for easy use.

[0083] like Figure 6As shown, during the forward rotation of the handrail body 1, the push nut 42 does not contact the drive wheel 43, and at this time the handrail body 1 does not drive the handrail retraction assembly 4 to move.

[0084] like Figure 7 As shown, when it is necessary to retract the handrail body 1, it is used to manually flip the handrail body 1 backward so that the handrail body 1 rotates to an angle that passes the handrail receiving groove 101.

[0085] like Figure 8 As shown, at this time, the push nut 42 contacts the drive wheel 43, and the push nut 42 drives the drive wheel 43 along... Figure 8 Rotating counterclockwise, the drive wheel 43 pulls the second cable 44.

[0086] like Figure 9 As shown, the second cable 44 causes the pawl 45 to separate from the ratchet 51, and the ratchet 51 moves along its own fastening spring. Figure 9 Rotating clockwise, ratchet 51 drives gear 55 to rotate clockwise in the opposite direction, and gear 55 drives cam 52 to rotate clockwise along... Figure 9 The cam rotates counterclockwise, causing the connecting rod 53 to move to the right, which in turn causes the armrest body 1 to move to the right.

[0087] The user then releases the armrest body 1, as follows Figure 10 As shown, the drive wheel reset spring drives the drive wheel 43 to reset, the drive wheel 43 pushes the push nut 42 in the opposite direction, and drives the handrail turntable 41 and the handrail body 1 to reset, so that the handrail body 1 returns to its original position. Figure 10 At this position, the armrest body 1 retracts towards the backrest 10 and enters the armrest receiving slots 101 on the left and right sides of the backrest 10, forming a whole with the backrest 10, with the outer side of the armrest body 1 flush with the outer side of the backrest 10.

[0088] like Figure 11 As shown, at this time, the ratchet 51 further moves along its own fastening spring. Figure 11 Rotating clockwise, ratchet 51 drives gear 55 to rotate clockwise in the opposite direction, and gear 55 drives cam 52 to rotate clockwise along... Figure 11 The cam rotates counterclockwise, and the cam 52 drives the connecting rod 53 to continue moving to the right. The connecting rod 53 drives the handrail body 1 to move to the right to the maximum extent until the handrail body 1 is completely retracted into the handrail receiving slot 101.

[0089] When the handrail body 1 needs to be used again, the user triggers the handle 31 again to extend the handrail body 1.

[0090] When the handrail body 1 is not needed, rotate the handrail body 1 backward and then release it to retract the handrail body 1.

[0091] In this embodiment, not only can the armrest body 1 be rotated and folded, but it can also extend outwards when in use and retract inwards into the side of the backrest 10 when folded. This not only increases the overall aesthetics of the seat but also prevents the armrest body 1 from occupying the space of the central aisle and prevents interference between the armrest body 1 and the central armrest.

[0092] In another embodiment of the present invention, such as Figure 12 As shown, the handrail retraction assembly 4 includes a motor 46, a transmission wheel 47, and a linkage component; when extended, the motor 46 drives the transmission wheel 47, and the transmission wheel 47 drives the linkage component to separate from the linkage assembly 5.

[0093] The motor 46 of the handrail retraction assembly 4 can be connected to the central control unit. The central control unit controls the rotation of the motor 46. When the central control unit receives the handrail retraction command, it drives the motor 46 to rotate. The motor 46 drives the transmission wheel 47 to rotate. The transmission wheel 47 drives the pawl 45 to rotate and separate from the ratchet 51.

[0094] In another embodiment of the present invention, as shown in Figure 13, the armrest retraction assembly 4 includes a motor 46, and the linkage assembly 5 further includes a motor 56. When the armrest needs to be retracted, the motor 46 rotates, driving the transmission wheel 47 to rotate, which in turn drives the pawl 45 to rotate and separate from the ratchet 51. When the armrest needs to be extended, the motor 56 drives the gear 55 to rotate, which in turn drives the cam 52 and the connecting rod 53 to move, thereby extending the armrest 1. Furthermore, the motor 56 can also adjust the extension amount of the armrest 1.

[0095] In this embodiment, the drive is fully electric, eliminating the need for cables. Motors 46 and 56 are driven directly by buttons, making it more convenient. The armrests can automatically adjust their position according to the usage requirements of the vehicle scenario. For example, the extension of the armrests in the left and right directions can be automatically adjusted based on the different body shapes of the passengers.

[0096] In another embodiment of the present invention, as Figure 14 As shown, the ratchet 51 has multiple continuous teeth. By adjusting the pulling process of the handle 31, the extension distance of the armrest body 1 can be continuously adjusted to accommodate passengers of different body types.

[0097] Optionally, such as Figure 15 As shown, multiple ratchet teeth are spaced apart on the ratchet 51, which can be set with several gears according to the body size of different passengers to achieve several different extension distances.

[0098] In some embodiments of the present invention, such as Figure 5 As shown, the seat includes a backrest 10 and a seat cushion 20, and also includes an armrest assembly as described in any of the above embodiments. Armrest receiving slots 101 are provided on both the left and right sides of the backrest 10.

[0099] like Figure 10 As shown, in the retracted state, the armrest body 1 retracts into the armrest receiving slot 101, and the outer side of the armrest body 1 is flush with the left and right sides of the backrest 10.

[0100] like Figure 1 As shown, in the extended state, the handrail body 1 extends out of the handrail receiving slot 101.

[0101] Furthermore, such as Figure 1-2 As shown, the armrest extension assembly 3 includes a handle 31 and a first pull cable 32. The first pull cable 32 connects the handle 31 and the linkage assembly 5. The handle 31 extends from the upper surface of the cushion 10, and the first pull cable 32 is installed inside the cushion 10. The handle 31 is designed to facilitate user operation.

[0102] Alternatively, the handle 31 can also be set in other positions on the backrest 10 or seat cushion 20, as long as it is convenient for the user to operate.

[0103] Both the armrest retraction assembly 4 and the armrest extension assembly 3 of the armrest assembly can be connected to the vehicle's central control unit. Sensors can be installed on the seat cushion 10 and seat cushion 20 to detect whether the occupant is seated and the occupant's body shape. Based on the data obtained after detection and user commands, the extension and retraction of the armrest body 1, as well as different extension distances, are controlled.

[0104] The above description is merely the principle and preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several other modifications can be made based on the principle of the present invention, and these modifications should also be considered within the scope of protection of the present invention.

Claims

1. A handrail assembly, comprising a handrail body and a handrail pivot, wherein the handrail body is rotatably connected about the handrail pivot, characterized in that, It also includes a handrail extension assembly, a handrail retraction assembly, and a linkage assembly, wherein the handrail extension assembly is connected to the linkage assembly, the linkage assembly is connected to the handrail body, and the handrail retraction assembly is connected to the handrail body; The armrest retraction assembly includes a linkage component, which is a pawl. The linkage component includes a ratchet, a cam, a connecting rod, and a slider. The ratchet is connected to the handrail extension component, the ratchet is connected to the cam, the connecting rod is connected between the cam and the slider, and the slider is connected to the handrail body. The armrest assembly includes at least an extended state and a retracted state: In the extended state, the handrail extension assembly drives the ratchet to rotate and connect with the pawl. The ratchet simultaneously drives the cam to rotate, the cam drives the connecting rod to extend, the connecting rod drives the slider to extend, and the slider drives the handrail body to extend. In the retracted state, the pawl separates from the ratchet, the ratchet's retaining spring causes the ratchet to rotate in the opposite direction, the ratchet causes the cam to rotate in the opposite direction, the cam causes the connecting rod to retract, and the connecting rod causes the handrail body to retract.

2. The armrest assembly according to claim 1, characterized in that, The handrail extension assembly includes a buckle and a first cable, the first cable connecting the buckle and the linkage assembly.

3. The armrest assembly according to claim 1, characterized in that, The handrail retraction assembly also includes a handrail turntable, a push nut, a drive wheel, and a second cable. The handrail turntable is fixedly connected to the handrail body, the push nut is fixedly installed on the handrail turntable, and the drive wheel is sleeved on the handrail shaft. When the handrail body rotates in the first direction during the retracted state, it drives the handrail turntable to rotate. After the push nut contacts the drive wheel, it pushes the drive wheel to rotate. The drive wheel pulls the second cable, and the second cable pulls the linkage member to separate from the linkage assembly.

4. The armrest assembly according to claim 3, characterized in that, A drive wheel return spring is installed on the drive wheel. When the handrail body rotates in the first direction and the handrail body is released, the drive wheel return spring drives the drive wheel to return to its original position. The drive wheel pushes the push nut in the opposite direction and drives the handrail turntable and the handrail body to return to their original positions.

5. The armrest assembly according to claim 1, characterized in that, The armrest retraction assembly also includes a motor and a drive wheel; in the extended state, the motor drives the drive wheel, and the drive wheel drives the linkage to separate from the linkage assembly.

6. The armrest assembly according to claim 1, characterized in that, The ratchet has multiple consecutive teeth.

7. The armrest assembly according to claim 1, characterized in that, The ratchet has multiple ratchet teeth spaced apart.

8. A chair, comprising a back cushion and a seat cushion, characterized in that, It also includes the armrest assembly according to any one of claims 1-7, wherein armrest receiving grooves are provided on both the left and right sides of the backrest; In the retracted state, the armrest body retracts into the armrest receiving slot, and the outer side of the armrest body is flush with the left and right sides of the cushion. When extended, the handrail body extends out of the handrail receiving slot.

9. The seat according to claim 8, characterized in that, The armrest extension assembly includes a handle and a first cable. The first cable connects the handle and the linkage assembly. The handle extends from the upper surface of the cushion, and the first cable is installed inside the cushion.

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