Electric seat frame and sofa

Abstract

The invention discloses an electric seat frame and a sofa, the electric seat frame comprises a base, armrests symmetrically and fixedly mounted on two sides of the base, and a backrest frame, a cushion frame and a leg support frame which are arranged between the two armrests and are rotatably connected in sequence, and two sides of the backrest frame are rotatably connected with the two armrests respectively; the two sides of the cushion frame are connected with the two armrests in a sliding and rotating mode respectively, a driving device is fixedly installed on the cushion frame, the driving device is provided with two output ends which are opposite in moving direction and parallel to the armrests, and the two output ends are in transmission connection with the base and the leg support frame respectively so as to control the cushion frame and the leg support frame to be adjusted respectively. And the backrest frame and the cushion frame are synchronously adjusted. According to the invention, the structure is simple, the assembly space is small and exquisite, the angle adjustment of the backrest and the legs can be respectively controlled, meanwhile, the cushion can be adjusted, and more comfortable sitting experience can be provided.

Description

Technical Field

[0001] This invention relates to the field of electric sofa technology, and more particularly to an electric seat frame and sofa. Background Technology

[0002] Existing multi-functional sofa chair frames typically adjust the backrest angle, leg angle, and seat cushion angle. The implementation methods mostly employ a multi-link iron frame structure. For example, a multi-functional sofa disclosed in Chinese invention patent CN 103622360 B uses a single motor to drive a push rod, which in turn drives a multi-link structure on both sides via a crossbar, thereby achieving angle adjustment of the backrest, seat cushion, and legs. This structure can only achieve overall structural linkage and cannot achieve individual backrest or leg angle adjustments. To solve the problem of individual backrest and leg angle adjustments, not only is an additional drive motor required, but also a more complex multi-link iron frame structure, resulting in a complex overall structure, high cost, and large assembly space requirements.

[0003] Chinese utility model patent application CN 209186085 U discloses an intelligent seat that uses two independent drive components and a simple single-link structure to separately control the angle adjustment of the backrest and legs. While the overall structure is simple, the seat cushion remains in a fixed position and cannot be adjusted, resulting in poor comfort. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an electric seat frame and sofa that not only has a simplified structure and compact assembly space, but also allows for separate control of the backrest and leg angles while also adjusting the seat cushion, providing a more comfortable seating experience.

[0005] The technical solution to achieve the objective of this invention is:

[0006] An electric seat frame includes a base, armrests symmetrically fixed on both sides of the base, and a backrest frame, a seat cushion frame, and a leg rest frame rotatably connected sequentially between the two armrests. The two sides of the backrest frame are rotatably connected to the two armrests respectively, and the two sides of the seat cushion frame are slidably and rotatably connected to the two armrests respectively. A drive device is fixedly mounted on the backrest frame. The drive device has two output ends with opposite directions of movement and parallel to the armrests. The two output ends are respectively connected to the base and the leg rest frame for transmission, so as to control the adjustment of the seat cushion frame and the leg rest frame respectively, and to make the backrest frame and the seat cushion frame adjust synchronously.

[0007] Furthermore, a first transmission rod and a second transmission rod located below the seat frame are respectively hinged to the base and the leg rest frame, and the other ends of the first transmission rod and the second transmission rod are respectively hinged to the two output ends of the drive device.

[0008] Furthermore, either the armrest or the seat frame is provided with a groove with a strip structure, and the other is rotatably provided with a sliding pin that matches the groove. The sliding pin is slidably installed in the groove so that the seat frame is connected to the armrest.

[0009] Furthermore, the first transmission rod is composed of a first lever arm and a second lever arm integrally formed with an included angle of 100 to 170°. The connection point between the backrest frame and the armrest is located at the rear upper part of the slide groove. The slide groove is inclined upward and its length is set so that when the sliding pin reaches the extreme positions at both ends of the slide groove, the mechanical included angle between the seat cushion frame and the backrest frame is within 70° to 160°.

[0010] Furthermore, a headrest frame is rotatably mounted on the top of the backrest frame, and drive rods are rotatably connected to both sides of the headrest frame. The other end of the drive rods is rotatably connected to the rear end of the seat cushion frame.

[0011] Furthermore, the drive device includes a main body, a controller, and a pair of electric lead screw assemblies electrically connected to the controller. The main body is detachably fixed to the seat cushion frame, the controller is fixed inside the main body, and the electric lead screw assembly includes a motor end, a lead screw end that is drivenly connected to the motor end, and a movable end that is threadedly engaged with the lead screw end. The two motor ends are symmetrically fixed to the main body, the two lead screw ends are centrally and parallelly arranged and rotatably inserted into the main body, and the two movable ends are drivenly connected to the base and the leg rest frame, respectively.

[0012] Furthermore, the main body is provided with a first receiving cavity and a second receiving cavity on both sides of the electric lead screw assembly. The controller is fixedly installed in the first receiving cavity. The bottom side of the main body is provided with a through hole that matches the wiring terminal on the controller. The second receiving cavity is provided with a mobile power supply that is electrically connected to the controller. The bottom of the main body is provided with a movable cover facing the mobile power supply.

[0013] Furthermore, the outer cover of the through hole is provided with a snap cover, the snap cover is provided with a snap that is adapted to the through hole, and the snap cover is rotatably mounted on the main body and is connected to the main body by a locking structure.

[0014] Furthermore, the main body includes an upper housing and a lower housing connected by screws, and a first wiring groove, a second wiring groove and a third wiring groove are provided between the upper housing and the lower housing; the same end of the first wiring groove and the second wiring groove are respectively connected to the two motor ends and a wiring channel is provided; the sides of the first wiring groove and the second wiring groove are respectively provided with a first wiring hole and a second wiring hole, and the first receiving cavity and the second receiving cavity are respectively connected to the first wiring groove and the second wiring groove through the first wiring hole and the second wiring hole; the other end of the second wiring groove is connected to the first receiving cavity through the third wiring groove.

[0015] Furthermore, a pair of limit switches electrically connected to the controller are provided on the outer side of the lead screw end, and a protrusion that senses the signal of the limit switch is provided on the side of the moving end near the limit switch.

[0016] Furthermore, the motor end is inclined, and the angle between it and the horizontal plane is 120° to 180°.

[0017] Furthermore, a first connecting frame and a second connecting frame are fixedly provided at the front and rear ends of the cushion frame, respectively. A snap-fit ​​part is connected between the rear end of the main body and the second connecting frame, and a locking part is connected between the front end of the main body and the first connecting frame.

[0018] Furthermore, the second connecting frame has a slot, and the rear end of the main body has a limiting post that matches the slot. The limiting post is inserted into the slot to form the locking part, and the front end of the main body has a locking bolt that is tightened on the first connecting frame to form the locking part.

[0019] An electric sofa, including the electric seat frame as described above.

[0020] By adopting the above technical solution, the present invention has the following beneficial effects:

[0021] (1) The present invention sets the driving device on the seat cushion frame. One of the output ends drives the seat cushion frame to adjust the position and angle relative to the armrest, thereby driving the backrest frame to adjust the angle synchronously. The other output end drives the footrest frame to adjust the angle. The overall structure is simple and the assembly space is small. While realizing the separate control of the backrest and leg angle adjustment, it can also take into account the seat cushion adjustment, providing a more comfortable sitting experience.

[0022] (2) The two output ends of the drive device of the present invention only need one transmission rod to connect with the corresponding component to realize transmission. There is no need for a complex transmission structure. Not only is the manufacturing and maintenance cost low, but the service life is also longer and the transmission accuracy is higher.

[0023] (3) The present invention achieves sliding and rotating connection between the seat frame and the armrest through the cooperation of the sliding groove and the sliding pin, which is simple in structure and easy to install.

[0024] (4) This invention can limit the angle adjustment range of the seat frame and the backrest frame by simply designing the relative position of the rotating connection point of the backrest frame and the slide groove, the structure of the slide groove and the structure of the first transmission rod. Compared with the complex multi-link structure, it simplifies the structure and saves costs. In addition, the adjustment range covers sitting, lying and zero-gravity postures, which can meet the sitting habits of various users and achieve multi-functionality.

[0025] (5) The present invention also includes an angle-adjustable headrest frame. When the seat cushion frame moves, the headrest frame is driven by the drive rod to adjust the angle, providing users with a more comfortable experience.

[0026] (6) This invention designs an electric lead screw assembly as the actuator of the drive device, sets the motor in the drive device to a corresponding angle, realizes the flat design of the drive device, and provides the mounting position by the main body installed on the seat cushion. At the same time, the main body naturally forms the support of the seat cushion, so that the thickness of the seat cushion part of the entire seat frame is minimized, and the overall seat forms a minimalist style.

[0027] (7) This invention realizes a rechargeable electric seat frame by setting a mobile power source, which has a wider range of applications. At the same time, through holes corresponding to the wiring terminals of the controller are set on the main body to facilitate the connection of the circuit.

[0028] (8) The present invention provides a buckle cover to support the line connector inserted on the controller, thereby improving the stability of the line connection and avoiding connection interruption caused by accidental pulling or movement.

[0029] (9) The present invention provides a cleverly designed wiring channel for wiring and circuit connection.

[0030] (10) The present invention limits the movement range of the moving end of the electric screw assembly by setting a limit switch, thereby improving the safety of use.

[0031] (11) By tilting the motor end, the present invention can make it fall within the thickness range of the main body as much as possible without increasing the thickness of the entire seat cushion, thus laying the foundation for the minimalist style of seat design.

[0032] (12) The present invention achieves a detachable connection between the main body and the seat frame through the cooperation of the snap-fit ​​part and the locking part, and adopts a snap-fit ​​structure combining the slot and the limiting post and a locking structure of the locking bolt. The structure is simple and easy to assemble and disassemble.

[0033] (13) The present invention integrates the control circuit, battery pack and dual drive device into the main body by designing it into an integrated modular structure, which makes installation convenient and the product appearance and structure simple. Attached Figure Description

[0034] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0035] Figure 1 This is a schematic diagram of the structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the drive device structure of the present invention;

[0037] Figure 3 This is a schematic diagram of the internal structure of the drive device of the present invention;

[0038] Figure 4 This is a schematic diagram of the wiring layout of the present invention;

[0039] Figure 5 This is a schematic diagram of the rear end structure of the main body of the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of the second connecting frame of the present invention.

[0041] The labels in the attached diagram are:

[0042] 1. Base, 1-1 Circular base, 1-2 Support rod, 1-3 Crossbar, 2. Armrest, 3. Backrest frame, 4. Seat cushion frame, 4-1 First connecting frame, 4-2 Second connecting frame, 4-2-1 Groove, 5. Leg rest frame, 5-1 Reinforcing rod, 6. Sliding groove, 7. Sliding pin, 8. Headrest frame, 9. Drive rod, 10. Main body, 10-1 Upper shell, 10-2 Lower shell, 10-3 First wiring groove, 10-4 Second wiring groove, 10-5 Third wiring groove, 10- Cable routing channel 6. First wiring hole 10-7, Second wiring hole 10-8, Movable cover 10-9, Limiting post 10-10, Controller 11, Electric lead screw assembly 12, Motor end 12-1, Lead screw end 12-2, Moving end 12-3, Buckle cover 13, Buckle 13-1, Mobile power supply 14, First transmission rod 15, First lever arm 15-1, Second lever arm 15-2, Second transmission rod 16, Third lever arm 16-1, Fourth lever arm 16-2, Limit switch 17. Detailed Implementation

[0043] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0044] (Example 1)

[0045] This embodiment provides an electric sofa with a newly designed electric seat frame, which not only realizes multi-part angle adjustment of the multi-link electric seat frame, but also retains the structural simplicity of the traditional dual-drive electric seat frame.

[0046] The electric seat frame in this embodiment is as follows: Figures 1 to 6As shown, the system includes a base 1, armrests 2 symmetrically fixed on both sides of the base 1, and a backrest frame 3, a seat cushion frame 4, and a leg support frame 5 rotatably connected between the two armrests 2. The backrest frame 3 is rotatably connected to the two armrests 2 on both sides, and the seat cushion frame 4 is slidably and rotatably connected to the two armrests 2 on both sides. A drive device is fixedly mounted on the backrest frame 3, which has two output ends with opposite directions of movement and parallel to the armrests 2. The two output ends are respectively connected to the base 1 and the leg support frame 5 to control the adjustment of the seat cushion frame 4 and the leg support frame 5. When the seat cushion frame 4 moves, the backrest frame 3 adjusts synchronously with it.

[0047] Specifically, in order to achieve the stability of the overall structure, the base 1 includes a circular base 1-1 and a support rod 1-2 coaxially fixed on the circular base 1-1. A horizontally arranged crossbar 1-3 is fixedly connected to the support rod 1-2, and two handrails 2 are symmetrically fixed at both ends of the crossbar 1-3.

[0048] The upper rear end of the armrest 2 is rotatably connected to the corresponding side of the backrest frame 3 via a pin. A strip-shaped groove 6 is provided on either the lower front end of the armrest 2 or the corresponding position of the seat cushion frame 4. A sliding pin 7, adapted to the groove 6, is rotatably provided on the other side. The sliding pin 7 is slidably installed within the groove 6, enabling a sliding and rotatable connection between the seat cushion frame 4 and the armrest 2. In this embodiment, considering ease of manufacturing, the groove 6 is formed on the armrest 2, and the sliding pin 7 is rotatably installed on the seat cushion frame 4. The leg rest frame 5 is rotatably installed on the front end of the seat cushion frame 4 via a hinge structure.

[0049] To provide users with better comfort, this embodiment includes a headrest frame 8. The headrest frame 8 is rotatably mounted on the top of the backrest frame 3 via pins, and drive rods 9 are rotatably connected to both sides of the headrest frame 3. The other end of the drive rods 9 is rotatably connected to the corresponding rear end of the seat cushion frame 4. When the position and angle of the seat cushion frame 4 change, the headrest frame 8 is adjusted synchronously via the drive rods 9.

[0050] The drive unit includes a main body 10, a controller 11, and a pair of electric lead screw assemblies 12 electrically connected to the controller 11. The main body 10 is detachably fixed to the seat frame 4, the controller 11 is fixed inside the main body 10, and the electric lead screw assembly 12 includes a motor end 12-1, a lead screw end 12-2 that is driven by the motor end 12-1, and a movable end 12-3 that is threadedly engaged with the lead screw end 12-2. The two lead screw ends 12-2 are centrally and parallelly arranged and rotatably inserted into the main body 10, and the two motor ends 12-1 are symmetrically fixed to the main body 10, respectively driven by the same end of the two lead screw ends 12-2. Specifically, both ends of the lead screw end 12-2 are rotatably mounted inside the main body 10 through bearings, and the ends are connected to the motor ends 12-1 through worm gear transmission, thereby realizing that the motor end 12-1 drives the lead screw end 12-2 to rotate around its own axis, thereby driving the movable end 12-3 to translate along the axial direction of the lead screw end 12-2. The controller 11 controls the forward and reverse rotation of the motor end 12-1, enabling the moving end 12-3 to perform reciprocating motion. In order to achieve a flat design of the drive device, the two motor ends 12-1 are set at an angle of 120 to 180° with the horizontal plane, so as to be adapted to the cross-section of the main body 1 as much as possible, so that it falls within the thickness range of the main body 1.

[0051] The main body 10 has a first receiving cavity and a second receiving cavity on both sides of the electric lead screw assembly 12. The controller 11 is fixedly installed in the first receiving cavity. The bottom side of the main body 10 has a through hole that matches the wiring terminal on the controller 11, facilitating wiring connection. A snap-fit ​​cover 13 is provided over the through hole, and the snap-fit ​​cover 13 has snap-fit ​​13-1 that matches the through hole, thereby supporting the wiring connector inserted into the controller 11, improving the stability of the wiring connection, and preventing connection interruption due to accidental pulling or movement. For easy maintenance, the snap-fit ​​cover 13 has connection holes on both sides, and the main body 10 has a boss corresponding to the connection hole. The connection hole is fitted onto the boss to achieve a rotatable connection. The top of the snap-fit ​​cover 13 has a pull-out latch, and the bottom of the main body 10 has a slot that matches the pull-out latch. The pull-out latch is inserted into the slot as a locking structure to achieve a fixed connection between the snap-fit ​​cover 13 and the main body. To expand the application scenarios, this embodiment has a mobile power supply 14 electrically connected to the controller 11 in the second receiving cavity.

[0052] Considering the compact structure of the entire drive device and the need to ensure that all components are installed within the main body as much as possible, this embodiment designs the main body 10 as an upper housing 10-1 and a lower housing 10-2 connected by screws. A first wiring groove 10-3, a second wiring groove 10-4, and a third wiring groove 10-5 are provided between the upper housing 10-1 and the lower housing 10-2. The same end of the first wiring groove 10-3 and the second wiring groove 10-4 are respectively connected to the two motor ends 12-1 by a wiring channel 10-6. The sides of the first wiring groove 10-3 and the second wiring groove 10-4 are respectively provided with a first wiring hole 10-7 and a second wiring hole 10-8. The first receiving cavity and the second receiving cavity are connected to the first wiring groove 10-3 and the second wiring groove 10-4 through the first wiring hole 10-7 and the second wiring hole 10-8, respectively. The other end of the second wiring groove 10-4 is connected to the first receiving cavity through the third wiring groove 10-5. One motor end 12-1's wires are sequentially connected to the controller 11 via the corresponding wiring channel 10-6, the first wiring groove 10-3, and the first wiring hole 10-7. The other motor end 12-1's wires are sequentially connected to the controller 11 via the corresponding wiring channel 10-6, the second wiring groove 10-4, the second wiring hole 10-8, and the third wiring groove 10-5. The power supply 14 is connected to the controller 11 via the third wiring groove 10-5. The bottom of the lower housing 10-2 is provided with a movable cover 10-9 facing the power supply 14, facilitating the installation and removal of the power supply.

[0053] The front and rear ends of the seat frame 4 are respectively fixed with a first connecting frame 4-1 and a second connecting frame 4-2. A snap-fit ​​part is connected between the rear end of the main body 10 and the second connecting frame 4-2, and a locking part is connected between the front end of the main body 10 and the first connecting frame 4-1. Through the cooperation of the snap-fit ​​part and the locking part, the main body 10 and the seat frame 4 are detachably connected. Specifically, the second connecting frame 4-2 has a slot 4-2-1, and the rear end of the main body 10 has a notch that matches the shape of the second connecting frame 4-2. A limiting post 10-10 that matches the slot 4-2-1 is provided in the notch. The second connecting frame 4-2 is snapped into the notch and the limiting post 10-10 is snapped into the slot 4-2-1 to form a snap-fit ​​part. The front end of the main body 10 has a locking bolt that is tightened on the first connecting frame 4-2 to form a locking part. The structure is simple and easy to assemble and disassemble. In order to achieve a firm connection, there are three pairs of slots 4-2-1 and limiting posts 10-10 in this embodiment.

[0054] The bottom of the movable end 12-3 is provided with a connecting part, and the bottom of the main body 1 is provided with a strip-shaped through groove arranged along the moving direction of the connecting part. A horizontally arranged reinforcing rod 5-1 is fixedly connected to the leg support frame 5. The support rod 1-2 near the upper end and the middle part of the reinforcing rod 5-1 are respectively hinged to the first transmission rod 15 and the second transmission rod 16 located below the seat frame 4. The other ends of the first transmission rod 15 and the second transmission rod 16 are respectively hinged to the connecting parts of the two movable ends 12-3, so that the movable end of the drive device is respectively connected to the base 1 and the leg support frame 5.

[0055] The first transmission rod 15 consists of a first lever arm 15-1 and a second lever arm 15-2, both integrally formed with an angle of 100° to 170°. The second transmission rod 16 consists of a third lever arm 16-1 and a fourth lever arm 16-2, both integrally formed with an angle of 90° to 170°. By designing reasonable lever arm lengths and angles, and placing the connection point between the backrest frame 3 and the armrest 2 at the rear upper part of the slide groove 6, while the slide groove 6 is tilted upwards, and by limiting the appropriate length and tilt angle of the slide groove 6, the mechanical angles between the seat cushion frame 4 and the backrest frame 3 are 70° and 160° respectively when the sliding pin 7 reaches the extreme positions at both ends of the slide groove 6. This ensures that the entire adjustment range covers sitting, reclining, and zero-gravity postures, meeting the sitting habits of various users and achieving multi-functionality.

[0056] The working principle of this embodiment is as follows: The controller 11 controls the independent rotation of the two motor ends 12-1, so that the two moving ends 12-3 move in opposite directions along the lead screw end 12-2, thereby independently controlling the adjustment of the seat cushion frame 4 and the leg rest frame 5. The seat cushion frame 4 drives the backrest frame 3 and the headrest frame 8 to adjust synchronously. To improve safety, this embodiment has a pair of limit switches 17 electrically connected to the controller 11 on the outside of each lead screw end 12-2. The moving end 12-3 has a protrusion that senses the signal of the limit switch 17 on the side close to the corresponding limit switch 17, thereby limiting the movement range of the moving end of the electric lead screw assembly.

[0057] This invention mounts the drive unit on the seat cushion frame 4. One output terminal drives the seat cushion frame 4 to adjust its position and angle relative to the armrest 2, thereby simultaneously adjusting the angle of the backrest frame 3. The other output terminal drives the footrest frame 5 to adjust its angle. The overall structure is streamlined and compact, allowing for separate control of the backrest and leg angles while also adjusting the seat cushion, providing a more comfortable seating experience. Furthermore, the entire drive unit has a flat, arc-shaped structure, naturally supporting the seat cushion and minimizing the thickness of the seat cushion portion of the entire seat frame, resulting in a minimalist overall design.

[0058] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric seat frame, characterized in that: The device includes a base, armrests symmetrically fixed on both sides of the base, and a backrest frame, a seat cushion frame, and a leg support frame that are rotatably connected between the two armrests. The backrest frame is rotatably connected to the two armrests on both sides, and the seat cushion frame is slidably and rotatably connected to the two armrests on both sides. A drive device is fixedly mounted on the backrest frame. The drive device has two moving ends with opposite directions of movement and parallel to the armrests. The two moving ends are respectively connected to the base and the leg support frame for transmission, so as to control the adjustment of the seat cushion frame and the leg support frame respectively, and to make the backrest frame and the seat cushion frame adjust synchronously.

2. The electric seat frame according to claim 1, characterized in that: The base and the leg rest frame are respectively hinged to a first transmission rod and a second transmission rod located below the seat frame. The other ends of the first transmission rod and the second transmission rod are respectively hinged to the two output ends of the drive device.

3. An electric seat frame according to claim 2, characterized in that: The armrest and seat frame are each provided with a groove in the shape of a strip, and the other is provided with a sliding pin that is adapted to the groove. The sliding pin is slidably installed in the groove so that the seat frame is connected to the armrest.

4. An electric seat frame according to claim 3, characterized in that: The first transmission rod is composed of a first lever arm and a second lever arm integrally formed with an included angle of 100 to 170°. The second transmission rod is composed of a third lever arm and a fourth lever arm integrally formed with an included angle of 90 to 170°. The connection point between the backrest frame and the armrest is located above and behind the slide groove. The slide groove is inclined upward and its length is set so that when the sliding pin reaches the extreme positions at both ends of the slide groove, the mechanical included angle between the seat cushion frame and the backrest frame is within 70° to 160°.

5. An electric seat frame according to claim 1, characterized in that: A headrest frame is rotatably mounted on the top of the backrest frame, and drive rods are rotatably connected to both sides of the headrest frame. The other end of the drive rods is rotatably connected to the rear end of the seat cushion frame.

6. An electric seat frame according to any one of claims 1 to 5, characterized in that: The drive device includes a main body, a controller, and a pair of electric lead screw assemblies electrically connected to the controller. The main body is detachably fixed to the seat cushion frame, the controller is fixed inside the main body, and the electric lead screw assembly includes a motor end, a lead screw end that is drivenly connected to the motor end, and a movable end that is threadedly engaged with the lead screw end. The two motor ends are symmetrically fixed to the main body, the two lead screw ends are centrally and parallelly arranged and rotatably inserted into the main body, and the two movable ends are drivenly connected to the base and the leg rest frame, respectively.

7. An electric seat frame according to claim 6, characterized in that: The main body is provided with a first receiving cavity and a second receiving cavity on both sides of the electric lead screw assembly. The controller is fixedly installed in the first receiving cavity. The bottom side of the main body is provided with a through hole that matches the wiring terminal on the controller. The second receiving cavity is provided with a mobile power supply that is electrically connected to the controller. The bottom of the main body is provided with a movable cover facing the mobile power supply.

8. An electric seat frame according to claim 7, characterized in that: The outer cover of the through hole is provided with a buckle cover, and the buckle cover is provided with buckles that are adapted to the through hole. The buckle cover is rotatably mounted on the main body and is connected to the main body by a locking structure.

9. An electric seat frame according to claim 7, characterized in that: The main body includes an upper housing and a lower housing connected by screws. A first wiring groove, a second wiring groove, and a third wiring groove are provided between the upper housing and the lower housing. The same end of the first wiring groove and the second wiring groove are respectively connected to two motor ends and a wiring channel is provided. The sides of the first wiring groove and the second wiring groove are respectively provided with a first wiring hole and a second wiring hole. The first receiving cavity and the second receiving cavity are connected to the first wiring groove and the second wiring groove through the first wiring hole and the second wiring hole, respectively. The other end of the second wiring groove is connected to the first receiving cavity through the third wiring groove.

10. An electric seat frame according to claim 6, characterized in that: The outer side of the lead screw end is provided with a pair of limit switches that are electrically connected to the controller, and the side of the moving end near the limit switches is provided with a protrusion that senses the signal of the limit switches.

11. An electric seat frame according to claim 6, characterized in that: The motor end is inclined and the angle between it and the horizontal plane is 120° to 180°.

12. An electric seat frame according to claim 6, characterized in that: The front and rear ends of the cushion frame are respectively fixed with a first connecting frame and a second connecting frame. The rear end of the main body is connected to the second connecting frame with a snap-fit ​​part, and the front end of the main body is connected to the first connecting frame with a locking part.

13. An electric seat frame according to claim 12, characterized in that: The second connecting frame has a slot, and the rear end of the main body has a limiting post that matches the slot. The limiting post is inserted into the slot to form the locking part. The front end of the main body has a locking bolt that is tightened onto the first connecting frame to form the locking part.

14. An electric sofa, characterized in that: Including the electric seat frame as described in any one of claims 1 to 13.

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