Electric armrest and seat

Abstract

The utility model discloses an electric armrest and a seat, the electric armrest comprises an armrest, a motor and an armrest adjusting mechanism, and the motor drives the armrest adjusting mechanism to rotate so as to drive the armrest to rotate in the vertical direction. The armrest switch is designed on the armrest, so that the passenger can directly operate the armrest switch of the armrest below the arm, and the convenience of adjusting the electric armrest is improved; meanwhile, the handrail adjusting mechanism and the motor are coaxially arranged, the handrail adjusting mechanism is provided with a driving part through hole, the output end of the motor is provided with a motor output end special-shaped hole, the driving part through hole is communicated with the motor output end special-shaped hole, and the wire harness is connected with the power source through the handrail, the driving part through hole and the motor output end special-shaped hole in sequence from the handrail switch. According to the scheme, the wiring harness is arranged in the direction of the handrail and the axis of the output end of the motor, the wiring path is smooth and simple, and the risk that the wiring harness is wound and knotted is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of automobile accessories, and in particular to an electric armrest and a seat. Background Art

[0002] The electric armrest of a car seat is used to support the passenger's arms and is an important component to improve the passenger's riding comfort.

[0003] In the related art, a button for adjusting the support angle of the electric armrest for the passenger's arms is set on the seat cushion of the car seat. The button is far away from the armrest, and one hand is required to be on the electric armrest and the other hand to operate the button, which makes the adjustment operation of the electric armrest inconvenient. At the same time, the distance between the electric armrest and the button is relatively long, and the wiring harness between the electric armrest and the button is long, and the wiring harness is prone to entanglement, knotting and other problems, which affects the adjustment of the electric armrest.

[0004] Therefore, how to improve the convenience of adjusting the electric armrest while reducing the risk of wiring harness entanglement and knotting has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0005] The present application proposes an electric armrest to improve the convenience of adjusting the electric armrest and reduce the risk of wire harness entanglement and knotting. The present application also proposes a seat.

[0006] In order to achieve the above object, the present application provides an electric handrail, comprising:

[0007] An armrest is provided with an armrest switch;

[0008] A motor is installed on the inner side of the seat back assembly and close to the armrest;

[0009] An armrest adjustment mechanism is connected to the armrest, and the motor drives the armrest adjustment mechanism to rotate to adjust the armrest up and down;

[0010] The output end of the motor has a motor output end special-shaped hole opened along the axis direction of the motor, and the armrest adjustment mechanism has a special-shaped characteristic shaft segment matched with the motor output end special-shaped hole, and the special-shaped characteristic shaft segment is inserted into the motor output end special-shaped hole.

[0011] The armrest adjustment mechanism has a drive member through hole coaxially arranged with the special-shaped hole of the motor output end, the drive member through hole is connected to the special-shaped hole of the motor output end, one end of the wiring harness is connected to the armrest switch, and the other end of the wiring harness passes through the drive member through hole and the special-shaped hole of the motor output end to be connected to the power supply.

[0012] Preferably, in the above-mentioned electric armrest, the armrest core component is a differential planetary gear reduction mechanism, including an armrest core component drive, a dust cover, a backlash elimination component, an external gear ring, an internal gear ring, a sheath, and a limiting component.

[0013] The backlash elimination component, the external gear ring, and the internal gear ring are sleeved on the shaft of the armrest core component drive. The external gear ring and the internal gear ring are meshed with each other under the tension of the backlash elimination component. At the same time, the sheath relatively fixes and restricts the external gear ring and the internal gear ring in the axial direction. The limiting component is installed on the drive limiting groove of the shaft to limit the axial positions of the parts on the armrest core component.

[0014] Preferably, in the above-mentioned electric armrest, the armrest adjustment mechanism further includes an armrest A plate and an armrest B plate.

[0015] One side of the armrest A plate is fixedly connected to the external gear ring, and the other side is connected to the armrest.

[0016] One side of the armrest B plate is fixedly connected to the internal gear ring, and the other side is fixedly connected to the side plate of the seat back assembly.

[0017] Preferably, in the above-mentioned electric armrest, the armrest A plate has an upper limit feature and a lower limit feature of the armrest A plate that bend and extend towards the armrest B plate.

[0018] The armrest B plate has a limiting feature of the armrest B plate that bends and extends towards the armrest A plate. The limiting feature of the armrest B plate is located between the upper limit feature and the lower limit feature of the armrest A plate. The upper limit feature and the lower limit feature of the armrest A plate can rotate with the armrest A plate, so that the upper limit feature or the lower limit feature of the armrest A plate abuts against the limiting feature of the armrest B plate to limit the movement of the armrest.

[0019] Preferably, in the above-mentioned electric armrest, the armrest switch is located at one end of the armrest away from the seat back assembly.

[0020] Preferably, in the above-mentioned electric armrest, the motor is fixedly connected to the inner side of the seat back assembly through mounting bolts.

[0021] A seat includes an electric armrest, and the electric armrest is the electric armrest described in any one of the above solutions.

[0022] The electric armrest provided by the embodiment of the present application includes an armrest, a motor, and an armrest adjustment mechanism. The motor drives the armrest adjustment mechanism to rotate, and then the armrest adjustment mechanism drives the armrest to rotate. The armrest adjustment mechanism drives the armrest to rotate in the up and down directions. In the electric armrest disclosed in this solution, the armrest switch is designed on the armrest, and passengers can directly operate the armrest switch of the armrest located under the arm. Compared with the method of setting the armrest switch on the seat cushion, the passenger's hand does not need to leave the armrest, which improves the convenience of adjusting the electric armrest; the armrest adjustment mechanism is coaxially arranged with the motor. The armrest adjustment mechanism has a driving part through hole coaxially arranged with the output end of the motor. The output end of the motor has a special-shaped hole of the motor output end opened along its own axis direction. The driving part through hole is communicated with the special-shaped hole of the motor output end. The wire harness is connected to the power supply sequentially through the armrest, the driving part through hole, and the special-shaped hole of the motor output end from the armrest switch. In this solution, the wire harness is routed along the direction of the armrest and the axis of the output end of the motor. The routing path is smooth and simple, reducing the risk of wire harness entanglement and knotting.

[0023] The present application also discloses a seat, including an electric armrest, and the electric armrest is the electric armrest described in any one of the above solutions. Since the electric armrest has the above technical effects, the seat with this electric armrest also has the same technical effects, which will not be elaborated here. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the drawings described below are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings, and the present application can also be applied to other similar scenarios according to the provided drawings. Unless obvious from the language context or otherwise stated, the same reference numerals in the drawings represent the same structure or operation.

[0025] Figure 1 It is an axonometric view of the assembly of the electric armrest and the seat back assembly of the present application;

[0026] Figure 2 It is an exploded view of the assembly of the electric armrest and the seat back assembly of the present application;

[0027] Figure 3 It is a sectional view of the assembly of the electric armrest and the seat back assembly of the present application;

[0028] Figure 4 It is an axonometric view of the electric armrest of the present application;

[0029] Figure 5 It is an exploded view of the armrest adjustment mechanism of the electric armrest of the present application;

[0030] Figure 6 It is a schematic structural diagram of the armrest adjustment mechanism and the motor assembly of the electric armrest of the present application;

[0031] Figure 7 It is a top view of the differential external gear ring reduction mechanism of the present application.

[0032] The attached drawings are described as follows:

[0033] 110 - seat back assembly; 120 - motor; 121a - special-shaped hole at the motor output end; 130 - armrest adjustment mechanism; 131 - armrest A plate; 131a - lower limit feature of the armrest A plate; 131b - upper limit feature of the armrest A plate; 132a - limit feature of the armrest B plate; 1331 - driving part of the armrest core part; 1331a - driving shaft; 1331b - limit groove of the driving part; 1331c - through hole of the driving part; 1332 - dust cover; 132 - armrest B plate; 1333 - clearance elimination component; 1333a - elastic element; 1333b - clearance elimination part; 1334 - external gear ring; 1335 - internal gear ring; 1336 - sheath; 1337 - limiting part; 140 - armrest; 141 - armrest switch; 150 - wire harness. Detailed implementation manners

[0034] The present application will be further described in detail below with reference to the attached drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the relevant application, rather than limiting the application. The described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0035] It should be noted that for the convenience of description, only parts related to the relevant application are shown in the attached drawings. Without conflict, the embodiments in the present application and the features in the embodiments can be arbitrarily combined with each other, as long as the combined technical features are not mutually contradictory. All feasible feature combinations are the technical contents clearly recorded herein. Any one of the multiple sub-features included in the same statement can be independently applied without necessarily being applied together with other sub-features.

[0036] As shown in this application and the claims, unless the context clearly indicates otherwise, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. An element defined by the statement "comprising one..." does not exclude the existence of other identical elements in the process, method, commodity, or device that includes the element.

[0037] Among them, in the description of the embodiments of this application, unless otherwise specified, " / " means "or". For example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "a plurality of" means two or more than two.

[0038] Please refer to Figures 1-7 。

[0039] Some embodiments of this application disclose an electric armrest, including an armrest 140, a motor 120, and an armrest adjustment mechanism 130.

[0040] An armrest switch 141 is provided on the armrest 140. The armrest switch 141 is connected to a power source through a wire harness 150, where the power source can be the vehicle power source or other power sources. Specifically, when a passenger operates the armrest switch 141, the armrest switch 141 is electrically connected to the power source. When the passenger does not operate the armrest switch 141, the armrest switch 141 is not electrically connected to the power source.

[0041] The motor 120 is installed inside the seat back assembly 110 and on the side close to the armrest 140. The motor 120 is installed inside the seat back assembly 110. On the one hand, the seat back assembly 110 plays a protective role for the motor 120, reducing the risk of damage caused by the motor 120 being exposed outside the seat back assembly 110 and the armrest. On the other hand, there is enough space inside the seat back assembly 110 for installing the motor 120, occupying the space inside the seat back assembly 110, without the need to improve the armrest 140, shortening the R & D time, reducing the transformation cost, and at the same time not changing the appearance of the armrest 140 and the seat back assembly 110;

[0042] The armrest adjustment mechanism 130 is located between the armrest 140 and the seat back assembly 110. The armrest adjustment mechanism 130 is connected to the armrest 140 and is also connected to the motor 120. The motor 120 drives the armrest adjustment mechanism 130 to rotate, and then the armrest adjustment mechanism 130 drives the armrest 140 to rotate in the up and down directions.

[0043] For the electric armrest disclosed in this solution, the armrest switch 141 is designed on the armrest 140. Passengers can directly operate the armrest switch 141 of the armrest 140 located under the arm. Compared with the way that the armrest switch 141 is arranged on the seat cushion, the passenger's hand does not need to leave the armrest, which improves the convenience of adjusting the electric armrest.

[0044] The wiring harness 150 can be arranged inside the armrest 140 or outside the armrest 140. The wiring harness 150 is arranged along the direction of the armrest 140.

[0045] In the embodiment where the wiring harness 150 is arranged inside the armrest 140, the armrest 140 has a cavity for accommodating the wiring harness 150. One end of the armrest switch 141 for connecting with the wiring harness 150 is located inside the cavity, and the end of the armrest switch 141 for passengers to operate is located outside the cavity. The cavity has an opening corresponding to the position of the armrest adjustment mechanism 130. One end of the wiring harness 150 is connected to the armrest switch 141, and the other end of the wiring harness 150 is led out through the opening along the cavity. The wiring harness 150 passes through the cavity inside the armrest 140, and the wiring harness 150 will not be exposed outside the armrest 140. Correspondingly, there is no need to separately provide a decorative part outside the armrest 140 to cover the wiring harness 150, which reduces the complexity and cost of the armrest design.

[0046] In the embodiment where the wiring harness 150 is arranged outside the armrest 140, there is a structure for fixing or wrapping the wiring harness 150 outside the armrest 140.

[0047] In this solution, the output end 121 of the motor 120 has a motor output end special-shaped hole 121a opened along its own axis direction. The armrest adjustment mechanism 130 has a special-shaped feature shaft section 1331a that cooperates with the motor output end special-shaped hole 121a. The special-shaped feature shaft section 1331a is inserted into the motor output end special-shaped hole 121a to achieve the plug-in connection between the armrest adjustment mechanism 130 and the output end 121 of the motor 120, and at the same time achieve the limit connection between the armrest adjustment mechanism 130 and the output end 121 of the motor 120, improving the reliability of the output end 121 of the motor 120 driving the armrest adjustment mechanism 130 to move.

[0048] The shaft section 1331a with special-shaped features and the motor 120 are connected through the cooperation of the special-shaped shaft section and the special-shaped hole, replacing the connection through other mechanical limiting structures, reducing the number of components used in the armrest adjusting mechanism 130, further simplifying the structure of the armrest adjusting mechanism 130, and reducing the cost of the armrest adjusting mechanism 130.

[0049] The shaft section 1331a with special-shaped features is a part of the shaft of the armrest adjusting mechanism 130. As Figure 4 and Figure 5 shown, the part of the shaft of the armrest adjusting mechanism 130 connected to the output end 121 of the motor 120 is the shaft section 1331a with special-shaped features. The shaft section 1331a with special-shaped features has special-shaped features, which can be grooves opened along the circumferential direction of the shaft or raised parts provided, so that the cross-section of this shaft section is not circular. The special-shaped features can also be a polygonal structure with a non-circular cross-section of the shaft section. The shaft section 1331a with special-shaped features can be a regular shape or an irregular shape.

[0050] The shaft section 1331a with special-shaped features extends to the free end of the shaft of the armrest adjusting mechanism 130. The set length of the shaft section 1331a with special-shaped features on the shaft of the armrest adjusting mechanism 130 is selected by those skilled in the art according to actual needs and will not be specifically limited here.

[0051] The special-shaped hole 121a at the output end of the motor is adapted to the shape of the shaft section 1331a with special-shaped features, and the cross-section of the special-shaped hole 121a at the output end of the motor is the same as the cross-sectional shape of the shaft section 1331a with special-shaped features.

[0052] In this solution, the armrest adjusting mechanism 130 has a driving part through-hole 1331c arranged coaxially with the special-shaped hole 121a at the output end of the motor. The driving part through-hole 1331c is communicated with the special-shaped hole 121a at the output end of the motor. One end of the wire harness 150 is connected to the armrest switch 141, and the other end of the wire harness 150 passes through the driving part through-hole 1331c and the special-shaped hole 121a at the output end of the motor and is connected to the power supply.

[0053] In this solution, by respectively arranging the driving part through-hole 1331c and the special-shaped hole 121a at the output end of the motor for the wire harness 150 to pass through on the armrest adjusting mechanism 130 and the output end 121 of the motor 120, the wire harness 150 is connected to the power supply through the armrest, the driving part through-hole 1331c, and the special-shaped hole 121a at the output end of the motor in sequence. In this solution, the wire harness 150 is arranged in the armrest 140, the driving part through-hole 1331c of the armrest adjusting mechanism 130, and the special-shaped hole 121a at the output end of the motor 120 at the output end of the motor. The wiring path is smooth and simple, reducing the risk of the wire harness 150 being wound and knotted.

[0054] As Figure 2As shown, the wire harness 150 is arranged along the direction of the armrest 140, the through hole 1331c of the driving member, and the special-shaped hole 121a at the output end of the motor. During the wiring process, the wire harness 150 has only two bends at the joint position of the armrest 140 and the through hole 1331c of the driving member and the end of the special-shaped hole 121a at the output end of the motor, and the bending angles are large, reducing the risk of the wire harness 150 being wound and knotted.

[0055] Preferably, in this solution, the axis of the armrest adjustment mechanism 130 is coaxial with the output axis of the motor 120, so that the through hole 1331c of the driving member and the special-shaped hole 121a at the output end of the motor are coaxial. During the rotation of the output end 121 of the motor 120 and the armrest adjustment mechanism 130, the wire harness 150 will not rotate with the output end 121 and will not rotate around the axis direction of the output end 121, avoiding the wire harness 150 being wound and knotted during the operation of the motor 120 and the armrest adjustment mechanism 130.

[0056] In some embodiments, the armrest core member 133 is a differential planetary gear reduction mechanism, including an armrest core member driving member 1331, a dust cover 1332, a backlash elimination assembly 1333, an outer gear ring 1334, an inner gear ring 1335, a sheath 1336, and a limiting member 1337.

[0057] As Figure 5 shown, the armrest core driving member 1331 has a shaft and a baffle at one end of the shaft. An axially special-shaped shaft section 1331a is provided at the end of the shaft far from the baffle. Among them, the above shaft and the shaft of the armrest core member 133 are of the same structure.

[0058] The backlash elimination assembly 1333, the outer gear ring 1334, and the inner gear ring 1335 are sleeved on the shaft of the armrest core member driving member 1331. The backlash elimination assembly 1333, the outer gear ring 1334, and the inner gear ring 1335 are sequentially sleeved on the shaft from the baffle. The outer gear ring 1334 is located inside the inner gear ring 1335, and the outer gear ring 1334 and the inner gear ring 1335 are meshed with each other under the tension of the backlash elimination assembly 1333.

[0059] The outer gear ring 1334 is connected to the armrest 140 through the armrest A plate 131, and the inner gear ring 1335 is fixed to the side plate of the seat back assembly 110 through the armrest B plate 132.

[0060] The shaft of the armrest core driving member 1331 is connected to the output end 121 of the motor 120 through the axially special-shaped shaft section 1331a. The output end 121 of the motor 120 drives the shaft of the armrest core driving member 1331 to rotate. The wedge block on the baffle of the armrest core driving member 1331 is connected to the backlash elimination assembly 1333 to drive the backlash elimination assembly 1333 to rotate. The backlash elimination assembly 1333 drives the outer gear ring 1334 to move, and the outer gear ring 1334 drives the armrest 140 to rotate through the armrest A plate 131.

[0061] The external gear ring 1334 and the internal gear ring 1335 are meshed with each other under the tension of the backlash elimination assembly 1333. The external gear ring 1334 has a self-rotation movement and a revolution rotation along the internal gear ring 1335, and the internal gear ring 1335 does not move.

[0062] In this solution, the power is transmitted through the differential planetary gear reduction mechanism. The differential planetary gear reduction mechanism has the advantages of compact structure, small volume, light weight, high transmission efficiency, stable performance, long service life and low cost. In this embodiment, an eccentricity is generated by the meshing of the external gear ring 1334 and the internal gear ring 1335, and the eccentricity e is generally less than 1 mm.

[0063] As Figure 3 and Figure 5 shown, the baffle has a wedge block, and the backlash elimination assembly 1333 has a wedge opening that cooperates with the wedge block. Through the cooperation of the wedge block and the wedge opening, the connection between the armrest core driving member 1331 and the backlash elimination assembly 1333 is realized. The armrest core driving member 1331 drives the backlash elimination assembly 1333 to rotate synchronously, and the backlash elimination assembly 1333 drives the external gear ring 1334 to rotate. The sheath 1336 relatively fixes and restricts the external gear ring 1334 and the internal gear ring 1335 in the axial direction.

[0064] The shaft of the armrest core driving member 1331 has a driving member limiting groove 1331b, and the limiting member 1337 is snap-fitted with the driving member limiting groove 1331b. The limiting member 1337 is used to limit the axial positions of the parts on the armrest core member 133, and each of the parts includes the backlash elimination assembly 1333, the external gear ring 1334 and the internal gear ring 1335, to prevent the backlash elimination assembly 1333, the external gear ring 1334 and the internal gear ring 1335 from moving along the axis of the shaft of the armrest core driving member 1331.

[0065] The length of the shaft of the armrest core driving member 1331 is greater than the sum of the lengths of the backlash elimination assembly 1333, the external gear ring 1334 and the internal gear ring 1335 along the axis of the shaft of the armrest core driving member 1331, and the driving member through hole 1331c is formed through the shaft of the armrest core member driving member 1331 and the baffle.

[0066] In some embodiments, the limiting member 1337 is a snap ring, and the driving shaft 1331a is provided with a driving member limiting groove 1331b for installing the snap ring. The limiting member 1337 is not limited to a snap ring and can also be other forms of limiting members, which are not specifically defined herein.

[0067] The armrest adjusting mechanism 130 is not limited to the above embodiments and can also be other forms, which are not specifically defined herein.

[0068] In some embodiments, the external gear ring 1334 is connected to the armrest 140 through the armrest A plate 131, as Figure 2 、Figure 3 and Figure 4 As shown in Figure 4 , the armrest A plate 131 has a receiving cavity. One end of the receiving cavity facing the external gear ring 1334 is an open end, and the portions of the armrest core part driving member 1331 and the dust cover 1332 protruding from the external gear ring 1334 are inserted into the receiving cavity through the open end. One end of the receiving cavity opposite to the open end is a closed end. The closed end of the receiving cavity is bolted to the armrest 140. At the same time, the portion of the armrest A plate 131 flush with the open end has a hemmed edge flush with the end face of the external gear ring 1334, and this hemmed edge is connected to the end face of the external gear ring 1334. Optionally, the hemmed edge of the armrest A plate 131 is welded to the external gear ring 1334. In this embodiment, the open end of the armrest A plate 131 is designed as a plane to reduce the overall thickness of the armrest A plate 131 in the axial direction of the driving shaft 1331a. The closed end of the armrest A plate 131 in contact with the armrest 140 has a through hole for the wire harness 150 to pass through.

[0069] The armrest A plate 131 covers the outside of the baffle of the armrest core part driving member 1331 through the receiving cavity. The armrest A plate 131 is not connected to the baffle. The external gear ring 1334 drives the armrest A plate 131 to rotate, and the armrest A plate 131 drives the armrest 140 to move. The armrest 140 rotates around the axis of the armrest core driving member 1331.

[0070] In some embodiments, the internal gear ring 1335 is connected to the seat back assembly 110 through the armrest B plate 132. The armrest B plate 132 is bolted or welded to the seat back assembly 110, and the armrest B plate 132 is welded to the internal gear ring 1335.

[0071] The angle of the up-and-down rotation of the armrest 140 needs to be limited. In some embodiments, the armrest B plate 132 has an armrest B plate limiting feature 132a extending towards the armrest A plate 131. The armrest A plate 131 has an armrest A plate upper limiting feature 131b and an armrest A plate lower limiting feature 131a extending towards the armrest B plate 132. The armrest B plate limiting feature 132a is located between the armrest A plate upper limiting feature 131b and the armrest A plate lower limiting feature 131a. The external gear ring 1334 drives the armrest A plate 131 to rotate, and the armrest A plate upper limiting feature 131b and the armrest A plate lower limiting feature 131a rotate with the armrest A plate 131. When the armrest A plate upper limiting feature 131b abuts against the armrest B plate limiting feature 132a, the armrest A plate 131 cannot continue to rotate to limit the armrest 140. When the armrest A plate lower limiting feature 131a abuts against the armrest B plate limiting feature 132a, the armrest A plate 131 cannot continue to rotate to limit the armrest 140.

[0072] Since the armrest A plate upper limiting feature 131b and the armrest A plate lower limiting feature 131a are respectively located on both sides of the armrest B plate limiting feature 132a, the armrest can be limited in both the upward and downward directions.

[0073] The structures of the limiting feature 132a of the armrest B plate, the upper limiting feature 131b of the armrest A plate, and the lower limiting feature 131a of the armrest A plate may be the same or different. For example Figure 2 and Figure 4 As shown, it is an embodiment where the limiting feature 132a of the armrest B plate, the upper limiting feature 131b of the armrest A plate, and the lower limiting feature 131a of the armrest A plate are plate-shaped limiting structures.

[0074] The limiting feature 132a of the armrest B plate is a part of the armrest B plate, the upper limiting feature 131b of the armrest A plate and the lower limiting feature 131a of the armrest A plate are parts of the armrest A plate. The limiting feature 132a of the armrest B plate, the upper limiting feature 131b of the armrest A plate, and the lower limiting feature 131a of the armrest A plate may be plate-shaped structures or block-shaped structures, etc. The feature is a superordinate description of various limiting structure forms.

[0075] Optionally, the limiting feature 132a of the armrest B plate and the armrest B plate, the upper limiting feature 131b of the armrest A plate and the lower limiting feature 131a of the armrest A plate and the armrest A plate are integrally formed respectively.

[0076] For example Figure 4 As shown, the limiting feature 132a of the armrest B plate, the upper limiting feature 131b of the armrest A plate, and the lower limiting feature 131a of the armrest A plate are all located outside the sheath 1336, which does not affect the cooperation between the limiting feature 132a of the armrest B plate, the upper limiting feature 131b of the armrest A plate, and the lower limiting feature 131a of the armrest A plate.

[0077] In some embodiments, the armrest switch 141 is located on the side of the armrest 140 away from the seat back assembly 110, increasing the distance between the armrest switch 141 and the seat back assembly 110 to provide sufficient installation space for the wire harness 150 and reducing the wiring difficulty of the wire harness 150.

[0078] For example Figure 4 As shown, the armrest switch 141 is arranged on the side of the armrest 140 close to the passenger's body, and the passenger can operate the armrest switch 141 with their fingers without raising their arm.

[0079] In some embodiments, the motor 120 is connected to the seat back assembly 110 by bolts.

[0080] This solution also discloses a seat, including an electric armrest, and the electric armrest is the electric armrest described in any of the above solutions. Since the electric armrest has the above technical effects, the seat with this electric armrest also has the same technical effects, which will not be elaborated here.

[0081] The above description is only a preferred embodiment of the present application and an explanation of the applied technical principles, and is not intended to limit the present application. For those skilled in the art, various modifications and variations can be made to the present application. The scope of the application involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above application concept. For example, the technical solutions formed by mutually replacing the above features with the technical features disclosed in the present application but not limited to those having similar functions.

Claims

1. An electric armrest, characterized in that, Comprising: An armrest (140) provided with an armrest switch (141); A motor (120) installed inside the seat back assembly (110) and on a side close to the armrest (140); An armrest adjustment mechanism (130) connected to the armrest (140), the motor (120) driving the armrest adjustment mechanism (130) to rotate to adjust the armrest (140) up and down; The output end (121) of the motor (120) has a motor output end special-shaped hole (121a) opened along its own axis direction, the armrest adjustment mechanism (130) has a special-shaped feature shaft section (1331a) matching with the motor output end special-shaped hole (121a), and the special-shaped feature shaft section (1331a) is inserted into the motor output end special-shaped hole (121a); The armrest adjustment mechanism (130) has a driving part through hole (1331c) coaxially arranged with the motor output end special-shaped hole (121a), the driving part through hole (1331c) is communicated with the motor output end special-shaped hole (121a), one end of a wire harness (150) is connected to the armrest switch (141), and the other end of the wire harness (150) passes through the driving part through hole (1331c) and the motor output end special-shaped hole (121a) to be connected to a power source.

2. The electric handrail according to claim 1, wherein The armrest core part (133) of the armrest adjustment mechanism (130) is a differential planetary gear reduction mechanism, including an armrest core part driving part (1331), a dust cover (1332), a backlash elimination component (1333), an external gear ring (1334), an internal gear ring (1335), a sheath (1336) and a limiting part (1337); The backlash elimination component (1333), the external gear ring (1334) and the internal gear ring (1335) are sleeved on the shaft of the armrest core part driving part (1331), the external gear ring (1334) and the internal gear ring (1335) are meshed with each other under the tension of the backlash elimination component (1333), and at the same time, the sheath (1336) relatively fixes and limits the external gear ring (1334) and the internal gear ring (1335) in the axial direction, and the limiting part (1337) is installed on the driving part limiting groove (1331b) of the shaft to limit the axial positions of the parts on the armrest core part (133).

3. The electric handrail according to claim 2, characterized in that, The armrest adjustment mechanism (130) further includes an armrest A plate (131) and an armrest B plate (132); One side of the armrest A plate (131) is fixedly connected to the external gear ring (1334), and the other side is connected to the armrest (140); One side of the armrest B plate (132) is fixedly connected to the internal gear ring (1335), and the other side is fixedly connected to the side plate of the seat back assembly (110).

4. The electric handrail according to claim 3, wherein The armrest A plate (131) has an upper limit feature (131b) and a lower limit feature (131a) of the armrest A plate that are bent and extended towards the armrest B plate; The armrest B plate (132) has an armrest B plate limiting feature (132a) that bends and extends towards the armrest A plate (131). The armrest B plate limiting feature (132a) is located between the upper limiting feature (131b) and the lower limiting feature (131a) of the armrest A plate. The upper limiting feature (131b) and the lower limiting feature (131a) of the armrest A plate can rotate with the armrest A plate (131) so that the upper limiting feature (131b) or the lower limiting feature (131a) of the armrest A plate abuts against the armrest B plate limiting feature (132a) to limit the movement of the armrest (140).

5. The electric handrail according to claim 1, characterized in that, The armrest switch (141) is located at one end of the armrest (140) away from the seat back assembly (110).

6. The electric handrail according to claim 1, characterized in that The motor (120) is fixedly connected to the inner side of the seat back assembly (110) through mounting bolts.

7. A seat, characterized in that, It includes an electric armrest, and the electric armrest is the electric armrest according to any one of claims 1-6.

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