CN109177836B

CN109177836B - Headrest cushion linkage seat

Info

Publication number: CN109177836B
Application number: CN201811130170.6A
Authority: CN
Inventors: 张寅�; 杨纪慈; 赵旭楠
Original assignee: Adient Engineering and IP GmbH
Current assignee: Yanfeng International Seating Systems Co Ltd
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2020-06-05
Anticipated expiration: 2038-09-27
Also published as: CN109177836A

Abstract

The invention relates to a headrest and cushion linkage seat which comprises a seat cushion framework, a first rope, a linkage mechanism, a second rope, a headrest support and a backrest framework, wherein the linkage mechanism is installed on the backrest framework and comprises a linkage screw rod and a linkage roller wheel, two ends of the first rope are respectively connected with the seat cushion framework and the linkage screw rod of the linkage mechanism, and two ends of the second rope are respectively connected with the linkage roller wheel of the linkage mechanism and the headrest support. According to the headrest cushion linkage seat, the cushion framework and the headrest support are connected through the linkage mechanism, and the cushion can be turned over and the headrest can be lifted synchronously only through one operation.

Description

Headrest cushion linkage seat

Technical Field

The invention relates to an automobile seat, in particular to a headrest cushion linkage seat.

Background

In modern society, people have increasingly high requirements for convenience of functional operation, and the simplification of machine components is also increasingly emphasized.

In the existing automobile seat structure, the turnover of the headrest and the cushion is carried out respectively, namely, the headrest and the cushion can be turned over respectively only by operating twice, and the turnover is relatively complex.

Disclosure of Invention

In order to solve the problem of complexity caused by two operations in the prior art, the invention aims to provide a headrest and cushion linkage seat.

The invention relates to a headrest and cushion linkage seat which comprises a seat cushion framework, a first rope, a linkage mechanism, a second rope, a headrest support and a backrest framework, wherein the linkage mechanism is installed on the backrest framework and comprises a linkage screw rod and a linkage roller wheel, two ends of the first rope are respectively connected with the seat cushion framework and the linkage mechanism screw rod, and two ends of the second rope are respectively connected with the linkage mechanism roller wheel and the headrest support.

The linkage mechanism comprises a first helical gear and a second helical gear which are meshed, wherein a screw rod penetrates through the first helical gear to extend and is meshed with the first helical gear in a threaded manner, and a roller is fixedly connected with the second helical gear.

The rotation axis of the first bevel gear is perpendicular to the rotation axis of the second bevel gear.

The roller has a through hole, and the second helical gear has a rotating shaft partially accommodated and fixed in the through hole.

The periphery of the through hole is provided with a concave part, the periphery of the rotating shaft is provided with a sunken groove, and a flat key is arranged in the concave part and the sunken groove so as to fix the roller on the rotating shaft.

The free end of the rotating shaft extending from the through hole has a circumferential groove, and a clamp spring is clamped in the circumferential groove at the outer side of the roller to prevent the roller from falling off the rotating shaft.

The linkage mechanism further comprises a shell, the first bevel gear and the second bevel gear are contained in the shell, and the roller is located outside the shell.

The linkage mechanism further comprises a first bearing and a second bearing, and two ends of the first bevel gear are supported in the shell through the first bearing and the second bearing respectively.

The linkage mechanism further includes a first washer and a second washer disposed between the first bearing and the second bearing, respectively, and the housing.

The linkage mechanism further comprises a nut, a gasket and a spring, the tail end of the screw rod, extending out of the shell, is connected with the gasket through the nut, and the spring is sleeved on the screw rod between the gasket and the shell.

According to the headrest cushion linkage seat, the cushion framework and the headrest support are connected through the linkage mechanism, and the cushion can be turned over and the headrest can be lifted synchronously only through one operation. Compared with the prior art which needs two sets of structures to respectively realize the turnover of the cushion and the lifting of the headrest, the headrest cushion linkage seat mechanism is simple and is easy and convenient to operate.

Drawings

FIG. 1A shows a headrest cushion linked seat in a deployed state according to the present invention;

FIG. 1B shows a closed position of a headrest cushion linked seat in accordance with the present invention;

FIG. 2 is a schematic view of a headrest cushion linked seat in accordance with the present invention;

fig. 3 shows the connection of the first rope to the seat cushion frame;

FIG. 4 shows the connection of the first cord to the wire shaft;

fig. 5 shows the engagement of the first rope with the pulley;

FIG. 6 shows the connection of the second cable to the roller;

FIG. 7 illustrates the connection of the second cord to the headrest bracket;

FIG. 8 is an exploded view of the linkage;

FIG. 9 shows a connection relationship of a second bevel gear and a roller of the linkage mechanism;

FIG. 10 is a schematic view of the linkage in an assembled state;

FIG. 11 is a partial cross-sectional view of FIG. 10;

figure 12 shows a closed condition of the internal structure of a headrest cushion linked seat in accordance with the invention;

figure 13 shows an intermediate state of the internal structure of a headrest cushion linked seat in accordance with the invention;

figure 14 shows the deployed state of the internal structure of a headrest cushion linked seat according to the invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1A and 1B show a deployed state and a closed state, respectively, of a headrest-cushion-linked seat according to the present invention. When the seat in the unfolded state shown in fig. 1A needs to be closed, the folding of the seat cushion C and the lowering of the headrest H can be synchronously realized only by touching the button B, and finally the closed state shown in fig. 1B is achieved.

As shown in fig. 2, the headrest-cushion linked seat according to the present invention includes a seat cushion frame 1, a first rope 2, a link mechanism 3, a second rope 4, a headrest bracket 5, and a backrest frame 6, wherein the link mechanism 3 is mounted on the backrest frame 6, both ends of the first rope 2 are connected to the seat cushion frame 1 and the link mechanism 3, respectively, and both ends of the second rope 4 are connected to the link mechanism 3 and the headrest bracket 5, respectively, so that the seat cushion frame 1 and the headrest bracket 5 are linked by the link mechanism 3 and the

ropes

2, 4.

As shown in fig. 2, the first end 21 of the first rope 2 is fixed to the seat cushion frame 1, the second end 22 of the first rope 2 is fixed to the screw 31 of the link mechanism 3, and when the seat cushion frame 1 is folded back with respect to the back frame 6, the screw 31 is pulled by the first rope 2. Specifically, the seat cushion frame 1 is provided with a first rope fixing structure 11, as shown in fig. 3, a first end 21 of the first rope 2 is fixed to the first rope fixing structure 11 by a bolt, and, as shown in fig. 4, a second end 22 of the first rope 2 is fixed to a bottom end of the screw 31 by a bolt. Further, the backrest frame 6 is provided with a pulley 61, and as shown in fig. 5, the first rope 2 slides on the pulley 61 to reduce the friction of the first rope 2.

As shown in fig. 2, the first end 41 of the second rope 4 is fixed to the roller 33 of the link mechanism 3, the second end 42 of the second rope is fixed to the headrest bracket 5, and when the roller 33 rotates, the second rope 4 pulls the headrest bracket 5 to move relative to the back frame 6. Specifically, as shown in fig. 6, the first end 41 of the second rope 4 is fixed to the roller 33 by a bolt, and further, the headrest bracket 5 has a second rope fixing structure 51, and as shown in fig. 7, the second end 42 of the second rope is fixed to the second rope fixing structure 51 by a bolt.

As shown in fig. 8, the linkage mechanism 3 according to the present invention includes a screw 31 and a first bevel gear 32a, wherein the screw 31 extends through the first bevel gear 32a, and the external thread of the screw 31 meshes with the internal thread of the first bevel gear 32a to drive the first bevel gear 32a to rotate about a first axis X defined by the longitudinal central axis of the screw 31 by the raising and lowering of the screw 31 along the longitudinal central axis.

The linkage mechanism 3 further comprises a second helical gear 32b engaged with the first helical gear 32a, in particular, a gear of an outer surface of the first helical gear 32a is engaged with a gear of an outer surface of the second helical gear 32b to carry the rotation of the second helical gear 32b about a second axis Y defined by an axis perpendicular to the first axis X by the rotation of the first helical gear 32 a.

The linkage mechanism 3 further comprises a roller 33 fixedly connected to the second bevel gear 32b, so that the roller 33 is rotated around the second axis Y by the rotation of the second bevel gear 32 b. Specifically, as shown in fig. 9, the roller 33 has a through hole 331, and the second helical gear 32b has a rotating shaft 332 partially accommodated in the through hole 331. The through hole 331 has a recess 331a on its circumferential surface, the rotating shaft 332 has a sunken groove 332a on its circumferential surface, and a flat key 333 is disposed in the recess 331a and the sunken groove 332a to fix the roller 33 on the rotating shaft 332 for rotation therewith. In addition, the rotating shaft 332 has an annular groove 332b on the circumferential surface of the free end extending from the through hole 331, and a circlip 334 is engaged in the annular groove 332b on the outer side of the roller 33 to prevent the roller 33 from being released from the rotating shaft 332.

As shown in fig. 8 and 10, the linkage mechanism 3 according to the present invention further includes a first housing 34a, a second housing 34b, a first bearing 35a and a second bearing 35b, wherein the first housing 34a and the second housing 34b are fixed together by bolts and nuts to form a housing, the first helical gear 32a and the second helical gear 32b are accommodated in the housing, and the top end and the bottom end of the first helical gear 32a are supported in the housing by the first bearing 35a and the second bearing 35b, respectively, so as to lubricate the first helical gear 32a through the

bearings

35a, 35 b. In addition, the link mechanism 3 according to the present invention further includes a nut 36, a washer 37, and a spring 38, and the washer 37 is connected to the top end of the screw 31 protruding from the housing through the nut 36. The spring 38 is fitted over the lead screw 31, and its top end abuts against the pad 37 so that the pad 37 forms a top stop for the spring 38, and its bottom end abuts against the housing so that the housing forms a bottom stop for the spring 38, thereby providing restoring force to the lead screw 31.

As shown in fig. 8 and 11, the link mechanism 3 according to the present invention further includes first and

second washers

39a and 39b, which are respectively disposed between the first and

second bearings

35a and 35b and the housing, thereby reducing friction of the first and

second bearings

35a and 35 b.

The movement of the headrest-cushion linked seat of the present invention will be described with reference to fig. 12 to 14:

in the initial closed state shown in fig. 12, the seat cushion frame 1 is folded down manually, the first cord 2 pulls the lead screw 31 downward, the spring 38 is compressed, the roller 33 is driven to rotate forward by the first helical gear and the second helical gear, and the second cord 4 is wound up, so that the headrest bracket 5 is raised, as shown in fig. 13. In this way, the folding of the seat cushion frame 1 and the raising of the headrest bracket 5 are synchronized and linked until the unfolded state shown in fig. 14 is reached.

In the expanded state shown in fig. 14, the spring 38 is compressed to the minimum length, and at this time, the external force acting on the seat cushion frame 1 (the pull rod 31) is released, the spring 38 returns the upper wire rod 31, the roller 33 is driven to rotate reversely by the first and second bevel gears, and the second rope 4 is released, so that the headrest bracket 5 is lowered, as shown in fig. 13. In this way, the seat cushion frame 1 is returned in synchronization with the lowering of the headrest bracket 5 until the closed state of fig. 12 is reached.

The above embodiments are merely preferred embodiments of the present invention, which are not intended to limit the scope of the present invention, and various changes may be made in the above embodiments of the present invention. All simple and equivalent changes and modifications made according to the claims and the content of the specification of the present application fall within the scope of the claims of the present patent application. The invention has not been described in detail in order to avoid obscuring the invention.

Claims

1. A headrest cushion linkage seat is characterized by comprising a cushion framework, a first rope, a linkage mechanism, a second rope, a headrest support and a backrest framework, wherein the linkage mechanism is installed on the backrest framework and comprises a linkage screw rod and a linkage roller wheel, two ends of the first rope are respectively connected with the cushion framework and the screw rod of the linkage mechanism, two ends of the second rope are respectively connected with the linkage roller wheel and the headrest support, the linkage mechanism comprises a first helical gear and a second helical gear which are meshed, the screw rod extends through the first helical gear, the outer threads of the screw rod are meshed with the inner threads of the first helical gear so as to drive the first helical gear to rotate around a first axis through the movement of the screw rod along the first axis, the gears on the outer surface of the first helical gear are meshed with the gears on the outer surface of the second helical gear so as to drive the second helical gear to rotate around a second axis through the rotation of the first helical gear, the roller is fixedly connected with the second bevel gear.

2. The headrest cushion linked seat according to claim 1, wherein the first axis and the second axis are perpendicular.

3. The headrest-cushion-linked seat according to claim 1, wherein the roller has a through hole, and the second helical gear has a rotating shaft partially received and fixed in the through hole.

4. The headrest-cushion linked seat according to claim 3, wherein a recess is formed on a circumferential surface of the through hole, a depressed groove is formed on a circumferential surface of the rotary shaft, and a flat key is provided in the recess and the depressed groove to fix the roller to the rotary shaft.

5. The headrest-cushion-linked seat according to claim 3, wherein a circumferential surface of a free end of the rotary shaft projecting from the through hole has an annular groove, and a snap spring is engaged in the annular groove on an outer side of the roller to prevent the roller from coming off the rotary shaft.

6. The headrest cushion linked seat according to claim 1, wherein the linkage further comprises a housing, the first and second bevel gears being received within the housing, the rollers being located outside the housing.

7. The headrest cushion linked seat according to claim 6, wherein the linkage further comprises a first bearing and a second bearing, the first bevel gear having both ends supported within the housing by the first bearing and the second bearing, respectively.

8. The headrest cushion linked seat according to claim 7, wherein the linkage further comprises a first washer and a second washer, wherein the first washer is disposed between the first bearing and the housing and the second washer is disposed between the second bearing and the housing.

9. The headrest-cushion linkage seat according to claim 6, wherein the linkage mechanism further comprises a nut, a washer and a spring, the end of the screw rod extending out of the housing is connected with the washer through the nut, and the spring is sleeved on the screw rod between the washer and the housing.