Electrically powered child seat frame and electrically powered sofa

Abstract

The application relates to a child electric seat frame, which comprises a driving assembly and two mechanically stretching units arranged in a left-right symmetry, each of the mechanically stretching units is composed of a leg and foot assembly, a seat frame mounting piece, a backrest mounting rod and a transmission rod, the middle part of the backrest mounting rod is hingedly mounted on the seat frame mounting piece, the leg and foot assembly is mounted on the front part of the seat frame mounting piece, the driving assembly comprises a driving rod and a push rod motor, the tail part of the push rod motor is mounted on the seat frame mounting piece through a push rod motor mounting shaft, the driving head of the push rod motor is hinged with the driving rod through a driving head hinged shaft, and the two ends of the driving rod are connected with the first leg connecting rods of the two leg and foot assemblies respectively, the front end of the transmission rod is hingedly connected with a second leg connecting rod transmission shaft in the middle part of the second leg connecting rod, and the rear end of the transmission rod is hingedly connected with the backrest mounting rod through a backrest driving shaft. The application further comprises an electric sofa with the above child electric seat frame. The application has the advantages of high driving efficiency, small volume, low cost and good overall stability.

Description

Technical Field

[0001] This application relates to a child electric seat frame and its electric sofa, which is mainly applicable to the design and production of posture-adjustable child electric seat frames and electric sofas. Background Technology

[0002] Referring to the patent publication document with application publication number CN110693225A and invention title "An Electromechanical Extension Device", the defects of the prior art are: 1. The push rod motor is not directly connected to the leg assembly, resulting in low working efficiency; 2. It is not suitable for children, the motor stroke is relatively long, which increases the size, power and cost of the motor, thus making the size and cost of the electric sofa correspondingly larger; 3. The overall structure of the prior art is relatively complex, which on the one hand increases the cost and workload of production, installation and maintenance, and on the other hand, the complex structure increases the possibility of problems and affects the stability of the overall movement mechanism. Summary of the Invention

[0003] The technical problem solved by this application is to overcome the above-mentioned deficiencies in the prior art and to provide a children's electric seat frame and electric sofa that directly drives the leg assembly with a push rod motor to unfold or retract, has high driving efficiency, small size, low cost, and good overall stability.

[0004] The technical solution adopted by this application to solve the above-mentioned technical problems includes: a child electric seat frame, comprising a drive assembly and two mechanical extension units symmetrically arranged on the left and right sides. Each mechanical extension unit consists of a leg assembly, a seat frame mounting component, a backrest mounting rod, and a transmission rod. The backrest mounting rod is hinged to the seat frame mounting component at the middle. The leg assembly is mounted at the front of the seat frame mounting component. The drive assembly includes a drive rod and a push rod motor. The tail of the push rod motor is mounted to the seat frame mounting component through a push rod motor mounting shaft. The drive head of the push rod motor is hinged to the drive rod through a drive head hinge shaft. The characteristic is that: both ends of the drive rod are respectively connected to the first leg connecting rods of the two leg assemblies, driving the leg assemblies to unfold or retract. The front end of the transmission rod is hinged to the second leg connecting rod transmission shaft at the middle of the second leg connecting rod. The rear end of the transmission rod is hinged to the backrest mounting rod through a backrest drive shaft. This application provides a design in which a drive rod directly drives the first leg linkage to move, thereby causing the entire leg assembly to unfold or retract. Then, the second leg linkage drives the transmission rod to move, thereby causing the backrest mounting rod to tilt backward or straighten forward synchronously, resulting in relatively high driving efficiency.

[0005] This application's leg assembly comprises a first leg link, a second leg link, a third leg link, a fourth leg link, and a footrest mounting component. One end of each of the first and second leg links is hinged to the seat frame mounting component. The middle of the first leg link is fixedly connected to the drive rod. The first leg link is hinged to the middle of the fourth leg link via a first-fourth leg link hinge shaft. The other end of the first leg link is hinged to one end of the third leg link. The other end of the third leg link is hinged to the footrest mounting component. The footrest mounting component is hinged to one end of the fourth leg link, and the other end of the fourth leg link is hinged to the other end of the second leg link. This application simplifies the leg assembly structure, making the leg assembly more flexible to drive, lowering costs, reducing damage, and improving overall stability.

[0006] The first leg link of this application is provided with a leg limiting rivet. When the leg limiting rivet is in a sitting position, it contacts the front part of the fourth leg link and limits the leg assembly to the maximum retracted position. When the leg limiting rivet is in a lying position, it contacts the rear part of the fourth leg link and limits the leg assembly to the maximum extended position.

[0007] When the push rod motor described in this application is fully extended, the distance between the center of the drive head hinge shaft and the center of the push rod motor mounting shaft is between 260 mm and 268 mm, with a specific value of 264 mm. When the push rod motor is fully retracted, the distance between the center of the drive head hinge shaft and the center of the push rod motor mounting shaft is between 214 mm and 222 mm, with a specific value of 218 mm. Therefore, the stroke of the push rod motor in this application is no more than 54 mm, with a specific value of 46 mm. Due to the small stroke of the push rod motor in this application, the push rod motor occupies less space, has lower cost, and lower energy consumption, thereby resulting in a smaller space and lower cost for the electric sofa.

[0008] The technical solution adopted by this application to solve the above-mentioned technical problems also includes: an electric sofa suitable for children, characterized in that: the child electric seat frame is installed on the sofa frame, the backrest frame is installed on the backrest mounting rod, and the footrest is installed on the footrest mounting piece, thereby constituting the basic structure of an electric sofa specifically for children.

[0009] The distance between the front and back of the sofa frame in this application is between 540 mm and 560 mm; when in a sitting position, the footrest surface is flush with the front plane of the sofa frame, and the footrest is perpendicular to the ground, blocking the front gap of the sofa frame to prevent debris and dust from entering the bottom of the sofa, and the width of the footrest is between 540 mm and 560 mm.

[0010] The footrest of the electric sofa in the reclining position of this application has a footrest surface parallel to the horizontal plane, and the distance between the footrest surface and the ground is between 298 mm and 306 mm; the distance between the front end of the footrest and the back of the sofa frame is between 845 mm and 865 mm.

[0011] Compared with the prior art, this application has the following advantages and effects: it has a seat frame mounting component, which makes production and installation convenient and cost-effective, and has good overall stability. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of the child electric seat frame in the sitting posture state (push rod motor fully retracted) according to an embodiment of this application.

[0013] Figure 2 This is a three-dimensional schematic diagram of the child electric seat frame in a reclining position (with the push rod motor fully extended) according to an embodiment of this application.

[0014] Figure 3 This is a three-dimensional schematic diagram of the sitting posture of the electric sofa according to an embodiment of this application.

[0015] Figure 4 This is a side view of the electric sofa in a sitting posture according to an embodiment of this application.

[0016] Figure 5 This is a side view of the electric sofa in a reclining position according to an embodiment of this application.

[0017] In the picture: Drive assembly 1, drive rod 11, push rod motor 12, drive head hinge shaft 121, push rod motor mounting shaft 122, leg assembly 2, first leg connecting rod 21, first and fourth leg connecting rod hinge shaft 211, leg limiting rivet 212, second leg connecting rod 22, second leg connecting rod mounting shaft 221, second leg connecting rod transmission shaft 222, third leg connecting rod 23, fourth leg connecting rod 24, fourth leg connecting rod front section 241, fourth leg connecting rod rear section 242, footrest mounting component 25, seat frame mounting component 3, backrest mounting rod 4, backrest drive shaft 41. 5. Transmission rod; 6. Sofa frame; 7. Backrest frame; 8. Footrest; 81. Footrest surface; 81. Distance L1 between the center of the drive head hinge shaft 121 and the center of the push rod motor mounting shaft 122 when the push rod motor is fully extended; 82. Distance L2 between the center of the drive head hinge shaft 121 and the center of the push rod motor mounting shaft 122 when the push rod motor is fully retracted; 83. Distance L3 between the front of the footrest and the back of the sofa frame when the push rod motor is fully extended; 84. Front-to-back distance of the sofa frame; 85. Footrest width; 86. Detailed Implementation

[0018] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. These embodiments are illustrative of the present application, but the present application is not limited to them. Figure 4 Left is front, right is back.

[0019] See Figures 1-5This application embodiment of the child electric seat frame includes a drive assembly 1 and two mechanical extension units symmetrically arranged on the left and right. Each mechanical extension unit consists of a leg assembly 2, a seat frame mounting part 3, a backrest mounting rod 4, and a transmission rod 5. The backrest mounting rod 4 is hinged to the seat frame mounting part 3 in the middle. The leg assembly 2 is installed at the front of the seat frame mounting part 3. The drive assembly 1 includes a drive rod 11 and a push rod motor 12. The tail of the push rod motor 12 is installed on the seat frame mounting part 3 through a push rod motor mounting shaft 122. The drive head of the push rod motor 12 is hinged to the drive rod 11 through a drive head hinge shaft 121. The design feature of this application is that the two ends of the drive rod 11 are respectively connected to the first leg connecting rod 21 of the two leg assemblies 2, which drives the leg assembly 2 to unfold or retract. The front end of the transmission rod 5 is hinged to the second leg connecting rod transmission shaft 22 in the middle of the second leg connecting rod 22. The rear end of the transmission rod 5 is hinged to the backrest mounting rod 4 through a backrest drive shaft 41. This application provides a design in which the first leg link 21 is directly driven by the drive rod 11, thereby causing the entire leg assembly 2 to unfold or retract. Then, the second leg link 22 drives the transmission rod 5 to move, thereby causing the backrest mounting rod 4 to tilt backward or straighten forward. The driving efficiency is relatively high.

[0020] The leg assembly 2 of this application consists of a first leg link 21, a second leg link 22, a third leg link 23, a fourth leg link 24, and a footrest mounting component 25. One end of both the first leg link 21 and the second leg link 22 is hinged to the seat frame mounting component 3. The middle of the first leg link 21 is fixedly connected to the drive rod 11. The first leg link 21 is hinged to the middle of the fourth leg link 24 via a first-fourth leg link hinge shaft 211. The other end of the first leg link 21 is hinged to one end of the third leg link 23. The other end of the third leg link 23 is hinged to the footrest mounting component 25. The footrest mounting component 25 is hinged to one end of the fourth leg link 24, and the other end of the fourth leg link 24 is hinged to the other end of the second leg link 22. This application simplifies the leg assembly structure, making the leg assembly more flexible to drive, lowering costs, and reducing the risk of damage.

[0021] In this application, a leg limiting rivet 212 is provided on the first leg link 21. When the leg limiting rivet 212 is in a sitting position, it contacts the front section 241 of the fourth leg link and limits the leg assembly 2 to its maximum retracted position. When the leg limiting rivet 212 is in a lying position, it contacts the rear section 242 of the fourth leg link and limits the leg assembly 2 to its maximum extended position.

[0022] When the push rod motor 12 of this application is fully extended, the distance L1 between the center of the drive head hinge shaft 121 and the center of the push rod motor mounting shaft 122 is between 260 and 268 mm, with a specific value of 264 mm. When the push rod motor is fully retracted, the distance L2 between the center of the drive head hinge shaft 121 and the center of the push rod motor mounting shaft 122 is between 214 and 222 mm, with a specific value of 218 mm. Therefore, the stroke of the push rod motor 12 of this application is no greater than 268-214=54 mm. Due to the small stroke of the push rod motor 12 of this application, the push rod motor 12 occupies less space, has lower cost, and lower energy consumption, thereby making the electric sofa smaller in size and lower in cost.

[0023] The child electric seat frame of this application is installed on the sofa frame 6, the backrest frame 7 is installed on the backrest mounting rod 4, and the footrest 8 is installed on the footrest mounting piece 25, which constitutes the basic structure of an electric sofa.

[0024] The front-to-back distance L5 of the sofa frame 6 in this application is between 540 mm and 560 mm, with a special case of 551 mm; in the seated position, the footrest 8 foot surface 81 is flush with the front plane of the sofa frame 6, see [reference needed]. Figure 3 , Figure 4 At this time, the footrest 8 is perpendicular to the ground, blocking the front notch of the sofa frame 6 to prevent debris and dust from entering the bottom of the sofa. The width L6 of the footrest 8 (which is equivalent to the height at this time) is between 193 mm and 203 mm, with an exception of 198 mm.

[0025] In this application, the footrest 8 of the reclining electric sofa has a footrest surface 81 that is parallel to the horizontal plane. The distance L3 between the footrest surface 81 and the ground is between 298 mm and 306 mm, and in a special case, it is 302 mm. The distance L4 between the front end of the footrest 8 and the back of the sofa frame 6 is between 845 mm and 865 mm, and in a special case, it is 855 mm.

[0026] The working process of the electric sofa in this application is as follows: exist Figure 3In the seated position, if the user wants to adjust the electric sofa's posture, they can control the push rod motor 12 via a controller (existing technology, not shown in the figure), thereby driving the drive rod 11 forward. This causes the first leg link 21 of the leg assembly 2 to extend forward. Simultaneously, the first leg link 21 extends forward, driving the fourth leg link 24 forward via the hinge shaft 211 of the first and fourth leg links. The fourth leg link 24 then drives the lower end of the second leg link 22 forward. The second leg link 22, in turn, drives the transmission rod 5 forward via the transmission shaft 222 of the second leg link, thereby driving the backrest drive shaft 41 forward. This causes the upper part of the backrest mounting rod 4 to tilt backward. Once the desired position is reached, the controller is turned off, or the leg limiting rivet 212 contacts the rear section 242 of the fourth leg link after reaching the reclining position. The leg assembly 2 stops extending, and the transmission rod 5 and the lower end of the backrest mounting rod 4 stop moving forward. Returning from the reclining position to the seated position is similar, but the process is reversed.

[0027] All parts not described in this application are prior art and will not be detailed further. Any simple modifications or combinations of the technical features and solutions of this application shall be considered to fall within the protection scope of this application.

Claims

1. A child electric seat frame, comprising a drive assembly and two symmetrically arranged mechanical extension units, each mechanical extension unit consisting of a leg assembly, a seat frame mounting component, a backrest mounting rod, and a transmission rod, wherein the backrest mounting rod is hinged to the seat frame mounting component at its center, the leg assembly is mounted at the front of the seat frame mounting component, the drive assembly includes a drive rod and a push rod motor, the tail of the push rod motor is mounted to the seat frame mounting component via a push rod motor mounting shaft, and the drive head of the push rod motor is hinged to the drive rod via a drive head hinge shaft, characterized in that: The two ends of the drive rod are respectively connected to the first leg connecting rod of the two leg components, the front end of the transmission rod is hinged to the second leg connecting rod transmission shaft in the middle of the second leg connecting rod, and the rear end of the transmission rod is hinged to the backrest mounting rod through the backrest drive shaft.

2. The child electric seat frame according to claim 1, characterized in that: The leg assembly consists of a first leg link, a second leg link, a third leg link, a fourth leg link, and a footrest mounting component. One end of the first leg link and the second leg link are both hinged to the seat frame mounting component. The middle part of the first leg link is fixedly connected to the drive rod. The first leg link is hinged to the middle part of the fourth leg link through a first-fourth leg link hinge shaft. The other end of the first leg link is hinged to one end of the third leg link. The other end of the third leg link is hinged to the footrest mounting component. The footrest mounting component is hinged to one end of the fourth leg link. The other end of the fourth leg link is hinged to the other end of the second leg link.

3. The child electric seat frame according to claim 2, characterized in that: The first leg link is provided with a leg limiting rivet, which contacts the front part of the fourth leg link in the sitting position and in the lying position.

4. The child electric seat frame according to claim 1, characterized in that: When the push rod motor is fully extended, the distance between the center of the drive head hinge shaft and the center of the push rod motor mounting shaft is between 260 mm and 268 mm. When the push rod motor is fully retracted, the distance between the center of the drive head hinge shaft and the center of the push rod motor mounting shaft is between 214 mm and 222 mm.

5. The child electric seat frame according to claim 1, characterized in that: When the push rod motor is fully extended, the distance between the center of the drive head hinge shaft and the center of the push rod motor mounting shaft is 264 mm; when the push rod motor is fully retracted, the distance between the center of the drive head hinge shaft and the center of the push rod motor mounting shaft is 218 mm.

6. An electric sofa, characterized in that: The electric sofa is composed of a child electric seat frame as described in any one of claims 1 to 5 mounted on a sofa frame, a backrest frame mounted on a backrest mounting rod, and a footrest mounted on a footrest mounting piece.

7. The electric sofa according to claim 6, characterized in that: The distance between the front and back of the sofa frame is between 540 mm and 560 mm; when seated, the footrest is flush with the front plane of the sofa frame.

8. The electric sofa according to claim 7, characterized in that: The width of the footrest is between 540 mm and 560 mm.

9. The electric sofa according to claim 6, characterized in that: In the reclining position, the footrest of the electric sofa is parallel to the horizontal plane, and the distance between the footrest and the ground is between 298 mm and 306 mm.

10. The electric sofa according to claim 9, characterized in that: When lying down, the distance between the front of the footrest and the back of the sofa frame is between 845 mm and 865 mm.

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