Mechanism for controlling rotation and extension of leg rest of seat by single motor

Abstract

The application discloses a kind of mechanism of single motor control leg support rotation and extension of seat, including motor fixed support, rotary arm plate, rotary link set, rotary body, telescopic link set and telescopic body, rotary link set and telescopic link set are each four left-right symmetrical design;Driving motor is installed in the front of motor fixed support, driving motor drives the rotation of screw rod of screw nut mechanism, one end of rotary arm plate is hinged on the nut of screw nut mechanism;Driving motor rotates rotary body by rotary link set;Rotary link three is fixedly connected with telescopic link one;Telescopic body is connected with rotary body by sliding assembly, rotary link set drives telescopic body parallel sliding relative to rotary body by telescopic link set and realizes extension. Through rotary link set and telescopic link set, leg support extension is realized when leg support rotates simultaneously, and the extension of maximum amplitude of leg support is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle seats or home seats, in particular to a mechanism for controlling leg rest rotation and leg rest extension by a single motor. BACKGROUND

[0002] Nowadays, with the increasing demand for comfort and space of seats, leg rest mechanisms are provided on many vehicle seats or home seats to assist in increasing the leg support area to improve the comfort of sitting, reduce the feeling of small leg suspension, and thus reduce leg discomfort during long driving, thereby improving the comfort of sitting.

[0003] The leg rest adjusting device used in the prior art usually has too many motors, which is difficult to arrange in space and causes excessive noise. In addition, the motor is usually fixed with the driving rod, and the motor needs to be extended with the driving rod. The entire leg rest mechanism occupies a large space after extension, and appears bulky. Multiple motors also cause low motor power utilization rate and complex control module logic. SUMMARY

[0004] In view of the defects of the prior art, the technical problem to be solved by the present application is to provide a mechanism for realizing large-amplitude rotation by multiple motions and controlled by a single motor.

[0005] To solve the above technical problems, the present application adopts the following technical scheme: a mechanism for controlling leg rest rotation and extension by a single motor, comprising a motor fixing bracket, a rotating arm plate, a rotating link set, a rotating body, an extension link set and an extension body; the rotating link set is composed of rotating link one, rotating link two, rotating link three and rotating link four, and the extension link set is composed of extension link one, extension link two, extension link three and extension link four;

[0006] The motor fixing bracket is used to be installed on the seat frame, and a driving motor is installed in front of the motor fixing bracket. The driving motor drives the rotation of the lead screw of the screw nut mechanism, and one end of the rotating arm plate is hinged to the nut of the screw nut mechanism. The rotating arm plate is fixedly connected with the rotating link one or the rotating link two through the cross bar one. The upper ends of the rotating link one and the rotating link two are respectively hinged to the seat frame. The lower end of the rotating link one is hinged to the rear end of the rotating link three, the middle part of the rotating link two is hinged to the middle part of the rotating link three, and the lower end of the rotating link two is hinged to the rear end of the rotating link four. The front ends of the rotating link three and the rotating link four are hinged to the rear of the rotating body, so as to realize the rotation of the rotating body driven by the rotating link set through the driving motor.

[0007] The rotating connecting rod three is fixedly connected with the telescopic connecting rod one, the front end of the telescopic connecting rod one is hingedly connected with the upper end of the telescopic connecting rod two, the rear end of the telescopic connecting rod one is hingedly connected with the upper end of the telescopic connecting rod three, the lower end of the telescopic connecting rod two is hingedly connected with the middle part of the telescopic connecting rod four, the lower end of the telescopic connecting rod three is hingedly connected with the rear end of the telescopic connecting rod four, the front end of the telescopic connecting rod four is hingedly connected at the rear of the telescopic body, and the telescopic body is connected with the rotating body through a sliding assembly.

[0008] Preferably, the rotating connecting rod two and the rotating connecting rod four are arranged inside the rotating connecting rod one and the rotating connecting rod three.

[0009] Preferably, the telescopic connecting rod one is an L-shaped rod, and the middle bending point of the L-shaped rod is fixedly connected with the rotating connecting rod three.

[0010] Preferably, a sliding groove is arranged on the telescopic body, and a sliding block is arranged on the rotating body.

[0011] Preferably, the sliding assembly adopts a ball bearing and a sliding rail structure.

[0012] Preferably, a mounting support is arranged at the rear of the telescopic body, and the front end of the telescopic connecting rod four is hingedly connected to the mounting support.

[0013] Preferably, the rotating connecting rod three is located outside the telescopic connecting rod one, and the two are fixedly connected through a horizontal rod two.

[0014] Preferably, the rotating connecting rod three is fixedly connected with the telescopic connecting rod one, the rotating arm plate is fixedly connected with the horizontal rod one, and the horizontal rod one is fixedly connected with the rotating connecting rod one or the rotating connecting rod two.

[0015] Preferably, the rotating connecting rod group and the telescopic connecting rod group are designed to be left-right symmetrical with the rotating arm plate as the center line, and each four.

[0016] The beneficial effects of the present application are as follows:

[0017] 1) The rotating connecting rod group and the telescopic connecting rod group are used to drive the leg support to realize telescopic movement when the leg support rotates, so that the maximum extension of the leg support is realized.

[0018] 2) The mechanism can also adjust the length ratio of the connecting rod and the hinge to meet the longer telescopic stroke and the arbitrary leg support telescopic speed.

[0019] 3) A single motor is used to reduce the noise decibel value during use of the leg support, simplify the control logic of the seat control module, and improve the power utilization rate of the leg support rotating motor. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic view of the folding state of the present application.

[0021] Figure 2 This is a schematic diagram of the folding state of the present invention;

[0022] Figure 3 This is a schematic diagram of the extended state of the present invention;

[0023] Figure 4 This is a schematic diagram of the extended state of the present invention;

[0024] Figure 5 This is a disassembly diagram of the present invention;

[0025] Figure 6 This is a three-dimensional schematic diagram of the present invention;

[0026] Figure 7 Schematic diagram showing the fixed connection between rotating link three and telescopic link one at the middle;

[0027] Figure 8 Schematic diagram of the fixed connection between the three rotating links and the left end of the one telescopic link;

[0028] Figure 9 Schematic diagram of the fixed connection between the three rotating links and the right end of the one telescopic link;

[0029] In the diagram: 1-Motor mounting bracket; 2-Rotating arm plate; 3-Rotating link one; 4-Rotating link two; 5-Rotating link three; 6-Rotating link four; 7-Rotating body; 8-Telescopic link one; 9-Telescopic link two; 10-Telescopic link three; 11-Telescopic link four; 12-Mounting support; 13-Telescopic body; 14-Slider; 15-Drive motor; 16-Lead screw; 17-Nut; 18-Crossbar one; 19-Crossbar two. Detailed Implementation

[0030] To better understand the improvements made by the present invention compared to the prior art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] As attached Figure 1 —9. In the attached drawing, "R" represents the right side of the invention, and "L" represents the left side of the invention. A mechanism for controlling the rotation and extension of a leg rest with a single motor in a seat mainly consists of a motor fixing bracket 1, a rotating arm plate 2, a rotating linkage assembly, and a rotating body 7.

[0032] The rotating linkage group consists of rotating linkage 1 (3), rotating linkage 2 (4), rotating linkage 3 (5), and rotating linkage 4 (6), while the telescopic linkage group consists of telescopic linkage 1 (8), telescopic linkage 2 (9), telescopic linkage 3 (10), and telescopic linkage 4 (11).

[0033] The motor mounting bracket 1 is used to install on the seat frame. A drive motor 15 is installed in front of the motor mounting bracket 1, and the drive motor 15 drives the lead screw 16 of the lead screw and nut mechanism to rotate. One end of the rotating arm plate 2 is hinged to the nut 17 of the lead screw and nut mechanism.

[0034] Rotating arm plate 2 is fixedly connected to rotating connecting rod 4 via crossbar 18 (e.g.) Figure 2 (As shown), alternatively, the rotating arm plate 2 can be fixedly connected to the rotating connecting rod 3 via a crossbar 18. The upper ends of the rotating connecting rod 3 and the second rotating connecting rod 4 are respectively hinged to the seat frame. The lower end of the rotating connecting rod 3 is hinged to the rear end of the third rotating connecting rod 5, and the middle part of the second rotating connecting rod 4 is hinged to the middle part of the third rotating connecting rod 5. The lower end of the second rotating connecting rod 4 is hinged to the rear end of the fourth rotating connecting rod 6. The front ends of the third rotating connecting rod 5 and the fourth rotating connecting rod 6 are both hinged to the rear of the rotating body 7, thereby enabling the drive motor 15 to drive the rotating body 7 to rotate via the rotating connecting rod assembly.

[0035] The connection between the rotating linkage assembly and the telescopic linkage assembly is achieved through a fixed connection between rotating linkage three 5 and telescopic linkage one 8. The front end of telescopic linkage one 8 is hinged to the upper end of telescopic linkage two 9, and the rear end of telescopic linkage one 8 is hinged to the upper end of telescopic linkage three 10. The lower end of telescopic linkage two 9 is hinged to the middle of telescopic linkage four 11, and the lower end of telescopic linkage three 10 is hinged to the rear end of telescopic linkage four 11. The front end of telescopic linkage four 11 is hinged to the rear of telescopic body 13. Telescopic body 13 and rotating body 7 are connected by a sliding assembly. The rotating linkage assembly drives the telescopic body 13 to slide parallel to the rotating body 7, thereby achieving telescopic extension and retraction.

[0036] Ideally, rotating link 2 (4) and rotating link 4 (6) should be positioned inside rotating link 1 (3) and rotating link 3 (5).

[0037] Ideally, the telescopic link 8 should be an "L"-shaped rod, and fixedly connected to the rotating link 5 through the middle bend of the "L"-shaped rod. Figure 7 As shown, the left and right ends of the telescopic link 8 can also be fixedly connected to the rotating link 5, as shown. Figure 8 and Figure 9 As shown. At the same time, the rotating link 3 5 is located outside the telescopic link 1 8, and the two are fixedly connected by the crossbar 2 19.

[0038] Ideally, a sliding groove is provided on the telescopic body 13, and a slider 14 is provided on the rotating body 7. The sliding components can also adopt a ball bearing or slide rail structure.

[0039] Ideally, the rotating link 35 should be welded and fixed to the telescopic link 18, the rotating arm plate 2 should be welded and fixed to the crossbar 18, and the crossbar 18 should be welded and fixed to the rotating link 13 or the rotating link 24.

[0040] Ideally, the drive motor 15, the motor mounting bracket 1, and the rotating arm plate 2 are arranged in the center, and the telescopic linkage assembly and the telescopic body 13, the rotating linkage assembly and the telescopic linkage assembly are all designed symmetrically about the rotating arm plate 2 as the center line, so as to meet the mechanism width required to control the rotation and extension of the leg support.

[0041] To facilitate connection, a mounting bracket 12 is provided at the rear of the telescopic body 13, and the front end of the telescopic connecting rod 11 is hinged to the mounting bracket 12.

[0042] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A mechanism for controlling the rotation and extension of a leg rest using a single motor in a seat, characterized in that: It includes a motor mounting bracket (1), a rotating arm plate (2), a rotating linkage group, a rotating body (7), a telescopic linkage group, and a telescopic body (13); the rotating linkage group consists of rotating linkage one (3), rotating linkage two (4), rotating linkage three (5), and rotating linkage four (6), and the telescopic linkage group consists of telescopic linkage one (8), telescopic linkage two (9), telescopic linkage three (10), and telescopic linkage four (11); The motor mounting bracket (1) is used to install on the seat frame. A drive motor (15) is installed in front of the motor mounting bracket (1). The drive motor (15) drives the lead screw (16) of the lead screw and nut mechanism to rotate. One end of the rotating arm plate (2) is hinged to the nut (17) of the lead screw and nut mechanism. The rotating arm plate (2) is fixedly connected to the rotating connecting rod (3) or the rotating connecting rod (4) through the crossbar (18). The rotating connecting rod (3) and the rotating connecting rod (4) The upper end of (4) is used to hinge with the seat frame, the lower end of rotating link one (3) is hinged with the rear end of rotating link three (5), the middle part of rotating link two (4) is hinged with the middle part of rotating link three (5), the lower end of rotating link two (4) is hinged with the rear end of rotating link four (6), and the front ends of rotating link three (5) and rotating link four (6) are hinged with the rear of rotating body (7), so that the drive motor (15) drives the rotating body (7) to rotate through the rotating link group; The rotating link three (5) is fixedly connected to the telescopic link one (8). The front end of the telescopic link one (8) is hinged to the upper end of the telescopic link two (9). The rear end of the telescopic link one (8) is hinged to the upper end of the telescopic link three (10). The lower end of the telescopic link two (9) is hinged to the middle of the telescopic link four (11). The lower end of the telescopic link three (10) is hinged to the rear end of the telescopic link four (11). The front end of the telescopic link four (11) is hinged to the rear of the telescopic body (13). The telescopic body (13) and the rotating body (7) are connected by a sliding assembly. The telescopic link group drives the telescopic body (13) to slide parallel to the rotating body (7) through the rotating link group to achieve telescopic extension and retraction. The telescopic link one (8) is an "L" shaped rod, which is fixedly connected to the rotating link three (5) through the middle bending point of the "L" shaped rod; The rotating link three (5) is located outside the telescopic link one (8), and the two are fixedly connected by the crossbar two (19).

2. The mechanism for controlling the rotation and extension of the leg rest of a seat using a single motor according to claim 1, characterized in that: The second rotating link (4) and the fourth rotating link (6) are located inside the first rotating link (3) and the third rotating link (5).

3. The mechanism for controlling the rotation and extension of the leg rest with a single motor as described in claim 1, characterized in that: The telescopic body (13) is provided with a sliding groove, and the rotating body (7) is provided with a slider (14).

4. The mechanism for controlling the rotation and extension of the leg rest of a seat with a single motor according to claim 1, characterized in that: The sliding component adopts a ball bearing and slide rail structure.

5. The mechanism for controlling the rotation and extension of the leg rest of a seat using a single motor according to claim 1, characterized in that: A mounting bracket (12) is provided at the rear of the telescopic body (13), and the front end of the telescopic link four (11) is hinged to the mounting bracket (12).

6. The mechanism for controlling the rotation and extension of the leg rest of a seat using a single motor according to claim 1, characterized in that: The rotating link three (5) is welded and fixed to the telescopic link one (8), the rotating arm plate (2) is welded and fixed to the crossbar one (18), and the crossbar one (18) is welded and fixed to the rotating link one (3) or the rotating link two (4).

7. The mechanism for controlling the rotation and extension of the leg rest of a seat with a single motor according to claim 1, characterized in that: The rotating link group and the telescopic link group are designed symmetrically with four on each side of the rotating arm plate (2) as the center line.

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