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CN-224197633-U - Pull-wire type electric four-way leg support mechanism

CN224197633UCN 224197633 UCN224197633 UCN 224197633UCN-224197633-U

Abstract

The utility model belongs to the technical field of vehicle seat leg supports, and particularly relates to a stay wire type electric four-way leg support mechanism. The utility model can realize two actions of leg support rotation and expansion by using a single screw rod stepping motor through reasonable structural design of the connecting rod expansion mechanism and the extension mechanism, can greatly save the space required by the arrangement of the leg support mechanism and is convenient for realizing the light weight of a seat, can finish the rotation and the extension of the vehicle seat leg support by pushing the connecting rod mechanism to overturn and expand by using the screw rod motor and matching a stay wire, a pulley and a sliding block, has compact integral structure, can effectively reduce the volume of the leg support when being stored, solves the storage problem of the vehicle seat leg support in a smaller space in the vertical direction, has flexible operation, is convenient to maintain, can effectively reduce the integral weight and the manufacturing cost of the seat, and is easy to popularize.

Inventors

  • GAO QIE
  • YUAN QUAN
  • ZHENG CHENGJIN

Assignees

  • 湖北中航精机科技有限公司武汉中航精冲技术分公司

Dates

Publication Date
20260505
Application Date
20250416

Claims (7)

  1. 1. A stay wire type electric four-way leg support mechanism is characterized by comprising a connecting rod unfolding mechanism (100), an extending mechanism (200) and a resetting module, wherein the connecting rod unfolding mechanism (100) comprises a leg support bracket (101) fixedly connected with a vehicle seat, a screw rod motor (102) is installed on the leg support bracket (101), the tail end of a stepping screw rod of the screw rod motor (102) is hinged with a driving bracket (103), the driving bracket (103) is fixedly installed on a transverse shaft (104), two sides of the transverse shaft (104) are fixedly connected with a connecting rod II (106), the middle parts of two sides of the leg support bracket (101) are hinged with the head ends of corresponding connecting rods I (105), the tail ends of the connecting rods I (105) are hinged with the head ends of corresponding connecting rods III (107), the head ends of the connecting rods II (106) are hinged with the tail ends of the leg support bracket (101) on the same side, the middle parts of the connecting rods II (106) are hinged with the first middle hinge points of the connecting rods III (107), the tail ends of the connecting rods II (106) are hinged with the tail ends of the corresponding connecting rods IV (108), the middle connecting rods II (107) are hinged with the tail ends of the connecting rods III (107) respectively, the tail ends of the connecting rods II (109) are hinged with the tail ends of the transverse rods (109) respectively, a sliding block (115) is fixedly connected to the sliding block cross beam (112), and the sliding block (115) is arranged in a sliding groove formed in the transverse plate (113) in a sliding manner; the extension mechanism (200) is of a sliding block sliding groove structure and comprises a sliding groove end (111-1) and a sliding block end (111-2), the sliding groove end (111-1) is fixedly connected to the outer side of the transverse plate support (110), a front transverse beam (201) and a rear transverse beam (202) are fixedly connected to the front part and the rear part of the sliding block end (111-2), one end of a stay wire (203) is fixedly connected to the rear transverse beam (202), the other end of the stay wire (203) bypasses a pulley block and is fixedly connected with the transverse plate (113), and leg support half basins (206) are fixedly sleeved outside the front transverse beam (201) and the rear transverse beam (202); The resetting module is connected between the connecting rod unfolding mechanism (100) and the extending mechanism (200) and is used for realizing the retracting and resetting actions of the leg rest mechanism.
  2. 2. The pull-wire type electric four-way leg support mechanism according to claim 1, wherein the pulley block comprises a first pulley (114-1) and a second pulley (114-2), the first pulley (114-1) is mounted on the back surface of the front end of the transverse plate (113), the transverse plate (113) is fixedly connected between transverse plate supports (110) on two sides, the second pulley (114-2) is fixedly connected after the sliding block (115) passes through the sliding groove, and the first pulley (114-1) and the second pulley (114-2) are fixedly mounted at corresponding positions through step screws (116).
  3. 3. The pull-wire type electric four-way leg support mechanism according to claim 2, wherein one end of the pull wire (203) is fixedly connected to the rear cross beam (202), and the other end of the pull wire is fixedly connected to the cross beam (113) after sequentially passing through the first pulley (114-1) and the second pulley (114-2).
  4. 4. The guyed electric four-way leg rest mechanism according to claim 1, wherein a plurality of parallel reset springs (205) are connected between the front beam (201) and the transverse plate (113).
  5. 5. The guyed electric four-way leg support mechanism of claim 1, wherein a plurality of sliding grooves are formed in parallel on the transverse plate (113), and a plurality of sliding blocks (115) with the number matched with the sliding grooves are fixedly connected to the sliding block transverse beam (112).
  6. 6. The pull-wire type electric four-way leg support mechanism according to claim 3, wherein two ends of the pull wire (203) are fixedly connected to the rear cross beam (202) and the cross plate (113) through corresponding fixing pieces (204) respectively.
  7. 7. The pull-wire type electric four-way leg rest mechanism according to claim 2, wherein the step screw (116) sequentially passes through the second pulley (114-2), the transverse plate (113) and the sliding block (115) and is then fixed on the sliding block transverse beam (112).

Description

Pull-wire type electric four-way leg support mechanism Technical Field The utility model belongs to the technical field of vehicle seat leg supports, and particularly relates to a stay wire type electric four-way leg support mechanism. Background The comfort requirement of the existing automobile on the market on the seat is further improved, and the zero gravity of the seat is adjusted to be a new bright point. In particular MPV or large SUV vehicles, have a requirement for zero-gravity adjustment of the middle row seats. Zero gravity adjustment refers to lifting the front end of the seat, so that the human body gravity of a passenger is uniformly released on the whole seat, and a heavy pressure area is avoided due to force concentration. While the passenger lies on his/her back, if the legs are not supported by the leg rest, the long-term sagging of the legs may cause a blood supply deficiency and discomfort, so the leg rest mechanism is an essential key part for achieving zero gravity adjustment of the seat. The four-way leg support mechanism of the automobile seat in the prior art controls the two actions respectively through two motors, namely, one motor drives the rotating mechanism to realize the rotating function and the other motor drives the telescopic mechanism to realize the telescopic function, and the scheme has higher requirements on the space of a seat framework and is unfavorable for controlling the cost and the weight of the seat. Disclosure of utility model The utility model aims to solve the technical problem of providing a stay wire type electric four-way leg support mechanism which is compact in structure and convenient to use, and can realize two actions of rotation and extension of a vehicle seat leg support through a single screw motor, so that the space required by the arrangement of the leg support mechanism can be greatly saved, and the weight reduction of a seat is facilitated. The technical scheme adopted by the utility model for solving the technical problems is as follows: The stay wire type electric four-way leg support mechanism mainly comprises a connecting rod unfolding mechanism 100, an extending mechanism 200 and a resetting module, wherein the connecting rod unfolding mechanism 100 comprises a leg support bracket 101 fixedly connected with a vehicle seat, a screw rod motor 102 is arranged on the leg support bracket 101, the tail end of a stepping screw rod of the screw rod motor 102 is hinged with a driving bracket 103, the driving bracket 103 is fixedly arranged on a transverse shaft 104, two sides of the transverse shaft 104 are fixedly connected with a connecting rod II 106, the middle parts of two sides of the leg support bracket 101 are hinged with the head ends of corresponding connecting rods I105, the tail ends of the connecting rods I105 are hinged with the head ends of corresponding connecting rods III 107, the head ends of the connecting rods II 106 are hinged with the tail ends of the leg support bracket 101 on the same side, the middle parts of the connecting rods II 106 are hinged with the first middle hinge points of connecting rods III 107, the tail ends of the connecting rods II 106 are hinged with the head ends of corresponding connecting rods IV 108, the second middle hinge points of the connecting rods III 107 are hinged with the head ends of connecting rods V109, the tail ends of the connecting rods III 107 are hinged with the tail ends of transverse plate brackets 110, the tail ends of the IV connecting rods 108 are hinged with the connecting rods IV 107, the tail ends of the connecting rods IV connecting rods 108 are hinged with the tail ends of the connecting rods 115, the connecting rods II connecting rods are fixedly connected with the sliding blocks 112, and the sliding blocks 112 are arranged on the outer side brackets and the sliding blocks 111 are connected with the transverse rods 115; The extension mechanism 200 is a sliding block and sliding groove structure, and comprises a sliding groove end 111-1 and a sliding block end 111-2 sleeved outside the sliding groove end 111-1, the sliding groove end 111-1 is fixedly connected to the outer side of the transverse plate support 110, a front transverse beam 201 and a rear transverse beam 202 are respectively fixedly connected to the front part and the rear part of the sliding block end 111-2, one end of a stay wire 203 is fixedly connected to the rear transverse beam 202, the other end of the stay wire 203 bypasses a pulley block and is fixedly connected with the transverse plate 113, and a leg support half basin 206 is fixedly sleeved outside the front transverse beam 201 and the rear transverse beam 202; The reset module is connected between the connecting rod unfolding mechanism 100 and the extension mechanism 200, specifically, the reset module comprises a reset spring 205, and the reset spring 205 is connected between the front cross beam 201 and the cross plate 113 and is used for matchi