CN212243069U

CN212243069U - Foldable headrest with pull rope

Info

Publication number: CN212243069U
Application number: CN202020804250.1U
Authority: CN
Inventors: 姜明; 金军良; 姜杰; 陆备峰; 汤国均; 於汉辉; 王建峰; 毛兴旺
Original assignee: Zhoushan Yindai Auto Parts Co ltd
Current assignee: Zhoushan Yindai Auto Parts Co ltd
Priority date: 2020-05-14
Filing date: 2020-05-14
Publication date: 2020-12-29
Anticipated expiration: 2030-05-14

Abstract

The utility model provides a take collapsible headrest of stay cord, including the pillow body, link and pillow frame, the pillow frame sets up on the link, the pillow body coupling is on the pillow frame, be provided with locking mechanical system and pillow frame canceling release mechanical system on the link, be provided with drive mechanism on the link, the canceling release mechanical system of gyro wheel and gyro wheel, the stay cord comprises many wires, the lower extreme of many wires passes the wire cover and stretches out the link, the upper end of many wires is connected with the gyro wheel respectively, drive mechanism's one end and gyro wheel are linked mutually, drive mechanism's the other end and locking mechanical system are linked mutually, when the stay cord one end that stretches out the link is drawn in the pulling, the gyro wheel is rotated in the rope pulling, locking mechanical system unblock pillow frame, when there is not tensile on the stay cord, the canceling release mechanical system drive gyro wheel antip. The advantages are that: the direct connection of the pull rope and the headrest rotation triggering structure is avoided, so that the stress of the connection part of the pull rope and the pull rope tension transmission structure is uniform, the pull rope is not easy to damage, and the service life is long.

Description

Foldable headrest with pull rope

Technical Field

The utility model relates to a headrest preparation technical field especially indicates a take collapsible headrest of stay cord.

Background

A prior chinese patent with patent number CN200580007454.0 entitled "foldable headrest" discloses a foldable headrest having two support members disposed on a bracket. The latch is integrated with at least one support. The latch abuts the stop pin to prevent rotation of the support in the first direction. The latch abuts the rotating cam to prevent movement of the support in the second direction. By rotating the cam, the support can be folded. A support comprising a metal base with an overmolded plastic geometry to receive a fitting disposed within the headrest bun. The geometry of the metal base and the overmolded plastic geometry reduces or even eliminates the slits typically required for such folding headrests. The folding capability can result in greater rear viewing capability and assist in movement of the seat. However, the foldable headrest needs a wire rope to directly pull the rotating cam, the joint of the wire rope and the rotating cam needs to bear a large pulling force, the cable nail is easily damaged, the service life is short, and the service life of the foldable headrest is further affected, so that the structure of the device needs to be further improved.

Disclosure of Invention

The utility model aims to solve the technical problem that a stay cord can avoid rotating with the headrest and trigger the structure and directly be connected to provide one kind to above-mentioned prior art current situation, and the stay cord is even with the junction atress of stay cord pulling force transmission structure, and is not fragile, long service life's collapsible headrest of taking the stay cord.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: this take collapsible headrest of stay cord, including the pillow body, can install link and pillow frame on car seat, the pillow frame can set up on the link with rotating, the pillow body coupling is on the pillow frame be provided with on the link and can with pillow frame locking positioning on the link and can unblock the locking mechanical system of pillow frame and pillow frame unblock back drive pillow frame canceling release mechanical system that resets its characterized in that when the stay cord pulling: the connecting frame is provided with a transmission mechanism, idler wheels capable of rotating relative to the connecting frame and a reset mechanism of the idler wheels, the pull rope is composed of a plurality of wires, the lower ends of the plurality of wires penetrate through wire sleeves connected to the connecting frame to extend out of the connecting frame, the upper ends of the plurality of wires are respectively connected with the idler wheels, one end of the transmission mechanism is linked with the idler wheels, the other end of the transmission mechanism is linked with the locking mechanism, when one end of the pull rope extending out of the connecting frame is pulled, the idler wheels are pulled to rotate by the pull rope, the idler wheels drive the locking mechanism to unlock the pillow frame through the transmission mechanism, and when no pulling force exists on the pull rope, the reset mechanism of the idler wheels.

As the improvement, the gyro wheel can be connected on the lateral wall of link through first pivot with rotating, the canceling release mechanical system of gyro wheel is first torsional spring, first torsional spring cover is put in first pivot, the one end of first torsional spring is connected with the gyro wheel, the other end of first torsional spring is connected with the link be provided with spacing convex part on the lateral wall of gyro wheel, be provided with on the corresponding lateral wall of link and push up and touch spacing convex part and prevent the gyro wheel continuation pivoted arch.

The improvement is further that, be provided with the holding tank on the another side of the gyro wheel relative with spacing convex part, first torsion spring cover is put on being located the axis body of the first pivot in the holding tank, the one end of first torsion spring is connected on the holding tank bottom surface, the other end of first torsion spring is connected on the link.

As an improvement, the circumference of the roller is provided with a first guide groove and a second guide groove at intervals in the axial direction, the number of the two wires is two, one end of the first wire is fixed on the side wall of the roller, the other end of the first wire penetrates through the first guide groove and extends out of the connecting frame, one end of the second wire is fixed on the side wall of the roller, and the other end of the second wire penetrates through the second guide groove and extends out of the connecting frame.

As an improvement, the transmission mechanism comprises a swing rod, a reset mechanism of the swing rod and a transmission part, the middle part of the swing rod is rotatably connected to the connecting frame, a limiting notch is arranged on the side wall of the roller, one end of the swing rod is abutted against the limiting notch, the other end of the swing rod is movably connected with one end of the transmission part, the other end of the transmission part is movably connected with the locking mechanism, when the roller is pulled by the pull rope to rotate, the limiting notch pushes the swing rod to swing, the swing rod drives the locking mechanism to unlock through the transmission part, and when no pull force exists on the pull rope, the reset mechanism of the swing rod drives the swing rod to reset.

The improved structure is characterized in that the middle of the oscillating rod is rotatably connected to the front side wall of the inner cavity of the connecting frame through a second rotating shaft, the roller is rotatably connected to the front side wall of one side of the oscillating rod, the reset mechanism of the oscillating rod is a second torsion spring, one end of the second torsion spring is fixed to the connecting frame, and the other end of the second torsion spring is buckled on the oscillating rod.

In a further improvement, the middle part of the swing rod connected with the second rotating shaft is positioned on the left side of the gravity center of the swing rod, the roller is positioned on the right side of the second rotating shaft, and the locking mechanism is positioned on the left side of the second rotating shaft.

As the improvement, the pillow frame is on the link through rotation axis connection, locking mechanical system includes locking piece, locking wheel and reset torsion spring, the locking piece is connected on the lateral wall of link through the third pivot, the reset torsion spring cover is put in the third pivot, the one end of reset torsion spring is connected with the link, the other end of reset torsion spring is connected on the locking piece, and the rotation end of locking piece is connected with drive mechanism, the locking wheel is connected in the axis of rotation with one heart, be provided with spacing arch on the locking wheel be provided with can with the rotation end looks block of locking piece and the breach portion of locking pillow frame in the spacing arch.

The locking wheel is further improved, an arc-shaped surface is arranged on the top surface of the rotating end of the locking block, and the bottom surface of the limiting bulge of the locking wheel is an arc surface which can be matched with the arc-shaped surface of the rotating end.

The pillow frame is characterized in that the pillow frame reset mechanism is a third torsion spring sleeved on the rotating shaft, one end of the third torsion spring is connected to a limiting wheel body of the rotating shaft, the other end of the third torsion spring is connected to the connecting frame, and when the pillow frame is driven to reset by the third torsion spring after the pillow frame is unlocked, the limiting wheel body pushes against the connecting frame to prevent the pillow frame from continuing to rotate.

Compared with the prior art, the utility model has the advantages of: the stay cord consists of a plurality of wires, is strong in toughness and not easy to break, and even if one wire breaks, other wires can still continuously conduct pulling force, so that the service life of the stay cord is prolonged, and the service life of the headrest is further prolonged; the transmission mechanism is driven by the roller, and then the locking mechanism is driven by the transmission mechanism, so that the stay cord is prevented from being directly connected to the locking block of the locking mechanism, the stay cord is wound on the circumference of the roller, the pulling force exerted on the stay cord is uniformly distributed and acts on the roller, the point connection of the stay cord and the unlocking mechanism in the prior art is changed into surface connection in the structure, and therefore the stay cord is prevented from being directly connected with the headrest rotation triggering structure, the stress of the joint of the stay cord and the stay cord pulling force transmission structure is uniform, the stay cord is not easy to damage, and the service life of the headrest is further prolonged; in addition, one end of the pull rope stretches out of the connecting frame after being wound, so that the moment of the pulling force applying end is increased, labor is saved when the headrest is pulled to be unlocked, and the headrest is convenient to unlock.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention applied to a headrest of an automobile;

FIG. 2 is an exploded view of the structure of FIG. 1;

FIG. 3 is a perspective view of the embodiment of the present invention with a portion of the connecting frame cut away;

FIG. 4 is a perspective view of the embodiment of the present invention after a portion of the connecting frame is cut away at another angle;

FIG. 5 is an exploded view of the structure of FIG. 4;

FIG. 6 is a perspective view of the embodiment of the present invention after a portion of the connecting frame is cut away at a third angle; .

Fig. 7 is an exploded view of an embodiment of the present invention;

FIG. 8 is a further exploded view of FIG. 7;

fig. 9 is a top view of an embodiment of the invention;

FIG. 10 is a cross-sectional view taken along line A-A of FIG. 9;

FIG. 11 is a cross-sectional view taken along line B-B of FIG. 9;

FIG. 12 is a perspective view of the pillow block of FIG. 9 after rotation;

FIG. 13 is a bottom view of FIG. 12;

FIG. 14 is a cross-sectional view taken along line C-C of FIG. 13;

fig. 15 is a cross-sectional view taken along line D-D of fig. 13.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 15, the foldable headrest with a pulling rope of the present embodiment includes a headrest body 2, a connecting frame 1 and a headrest frame 3 capable of being installed on a car seat, the headrest frame 3 is rotatably disposed on the connecting frame 1, the headrest body 2 is connected to the headrest frame 3, a locking mechanism capable of locking and positioning the headrest frame 3 on the connecting frame 1 and unlocking the headrest frame 3 when the pulling rope 4 is pulled and a headrest frame resetting mechanism for driving the headrest frame 3 to reset after the headrest frame 3 is unlocked are disposed on the connecting frame 1, a transmission mechanism, a roller 5 capable of rotating relative to the connecting frame 1 and a resetting mechanism of the roller 5 are disposed on the connecting frame 1, the pulling rope 4 is composed of a plurality of wires, the lower ends of the plurality of wires pass through a wire sleeve 11 connected to the connecting frame 1 and extend out of the connecting frame 1, the upper ends of the plurality of wires are respectively connected to the roller 5, one end of the transmission mechanism is linked with the roller 5, the other end of the transmission mechanism is, when one end of a pull rope 4 extending out of the connecting frame 1 is pulled, the pull rope 4 pulls the roller 5 to rotate, the roller 5 drives the locking mechanism to unlock the pillow frame 3 through the transmission mechanism, and when no pulling force exists on the pull rope 4, the reset mechanism of the roller 5 drives the roller 5 to rotate reversely to reset. The connecting frame 1 is connected to the fixing plate 10 through screws, and the fixing plate 10 is embedded and fixed on the car seat. The number of the wire sleeves 11 may be the same as the number of the wires, in which case the wires correspond to the wire sleeves 11 one to one. Of course, the number of conductor sets 11 may be less than the number of conductors, where portions of the conductors pass through the same conductor set 11.

The roller 5 is rotatably connected to a side wall of the connecting frame 1 through a first rotating shaft 51, the reset mechanism of the roller 5 is a first torsion spring 52, the first torsion spring 52 is sleeved on the first rotating shaft 51, one end of the first torsion spring 52 is connected with the roller 5, the other end of the first torsion spring 52 is connected with the connecting frame 1, a limit convex part 53 is arranged on the side wall of the roller 5, and a protrusion 12 which can push against the limit convex part 53 to prevent the roller 5 from continuously rotating is arranged on the corresponding side wall of the connecting frame 1. A receiving groove 54 is formed on the other side surface of the roller 5 opposite to the limit protrusion 53, the first torsion spring 52 is fitted over the shaft body of the first rotating shaft 51 positioned in the receiving groove 54, one end of the first torsion spring 52 is coupled to the bottom surface of the receiving groove 54, and the other end of the first torsion spring 52 is coupled to the link 1.

First guide grooves 55 and second guide grooves 56 are axially arranged on the circumference of the roller 5 at intervals, two wires are provided, one end of the first wire 41 is fixed on the side wall of the roller 5, the other end of the first wire 41 passes through the first guide grooves 55 and extends out of the connecting frame 1, one end of the second wire 42 is fixed on the side wall of the roller 5, and the other end of the second wire 42 passes through the second guide grooves 56 and extends out of the connecting frame 1. The number of conductor sets 11 may then be two, the first conductor 41 passing through the first conductor set and the second conductor 42 passing through the second conductor set. Of course, the number of the wire sheath 11 may be one, and the first wire 41 and the second wire 42 simultaneously pass through the third wire sheath. A detachable protective shell 50 is arranged above the roller 5, and the protective shell 50 is inserted into the side wall of the connecting frame 1 through a plug-in unit. The protective shell 50 can cover the guide groove on the roller 5, and better protect the pull rope 4.

Drive mechanism includes swinging arms 6, the canceling release mechanical system and the driving medium 61 of swinging arms 6, the middle part of swinging arms 6 can be connected on link 1 with rotating, be provided with spacing breach 57 on gyro wheel 5's lateral wall, the one end top of swinging arms 6 touches on spacing breach 57, the other end of swinging arms 6 is connected with the one end activity of driving medium 61, the other end and the locking mechanical system activity of driving medium 61 are connected, when 4 pulling gyro wheels 5 of stay cord rotate, spacing breach 57 promotes the swing arms 6 swing, swinging arms 6 drives the locking mechanical system unblock through driving medium 61, when no pulling force on stay cord 4, the canceling release mechanical system drive swinging arms 6 of swinging arms 6 reset. The middle part of the oscillating rod 6 can be rotatably connected to the front side wall of the inner cavity of the connecting frame 1 through the second rotating shaft 62, the roller 5 can be rotatably connected to the front side wall of one side of the oscillating rod 6, the reset mechanism of the oscillating rod 6 is a second torsion spring 63, one end of the second torsion spring 63 is fixed on the connecting frame 1, and the other end of the second torsion spring 63 is buckled on the oscillating rod 6. The middle of the swing lever 6 connected to the second rotating shaft 62 is located on the left side of the center of gravity of the swing lever 6, the roller 5 is located on the right side of the second rotating shaft 62, and the locking mechanism is located on the left side of the second rotating shaft 62. The transmission part 61 is composed of an upper connecting ring, a lower connecting ring and a connecting rod, the axial lead included angle between the upper connecting ring and the lower connecting ring is 90 degrees, the upper end of the connecting rod is connected with the upper connecting ring, the lower end of the connecting rod is connected with the lower connecting ring, the upper connecting ring is connected to the locking mechanism through a bolt, and the lower connecting ring is connected to the end part of the swinging rod 6 through another bolt.

Pillow 3 is connected on link 1 through axis of rotation 31, locking mechanical system includes locking block 7, locking wheel 71 and reset torsion spring 72, locking block 7 is connected on the lateral wall of link 1 through third pivot 73, reset torsion spring 72 cover is put on third pivot 73, the one end of reset torsion spring 72 is connected with link 1, the other end of reset torsion spring 72 is connected on locking block 7, the rotation end of locking block 7 is connected with drive mechanism, locking wheel 71 connects on axis of rotation 31 with one heart, be provided with spacing arch 711 on locking wheel 71, be provided with on spacing arch 711 can with the rotation end looks block of locking block 7 and lock the breach portion 74 of pillow 3. The top surface of the rotating end of the locking block 7 is provided with an arc surface 75, and the bottom surface of the limiting bulge of the locking wheel 71 is an arc surface 76 which can be matched with the arc surface 75 of the rotating end. The pillow frame reset mechanism is a third torsion spring 32 sleeved on the rotating shaft 31, one end of the third torsion spring 32 is connected to a limiting wheel body 33 of the rotating shaft 31, the other end of the third torsion spring 32 is connected to the connecting frame 1, and when the pillow frame 3 is reset by the third torsion spring 32 after the pillow frame 3 is unlocked, the limiting wheel body 33 is pressed against the connecting frame 1 to prevent the pillow frame 3 from rotating continuously. The upper part of the connecting frame 1 is provided with a stop shaft 13, and the limiting wheel body 33 and the limiting bulge 711 can be pressed against the stop shaft 13 so as to prevent the pillow frame 3 from further rotating. The lock wheel 71 and the stopper wheel body 33 are connected to the rotating shaft 31 by welding. The pillow rod 33 of the pillow frame 3 is provided with a positioning plate 35 which can move up and down relative to the pillow rod 33, the automobile headrest 2 is sleeved and fixed on the positioning plate 35, the back of the positioning plate 35 is provided with a positioning sleeve 351, and the positioning sleeve 351 is sleeved on the corresponding pillow rod 33. The pillow rod 33 is provided with a connecting hole or a connecting groove, the positioning sleeve 351 is also provided with a corresponding connecting through hole or a connecting through groove, and the pillow rod 33 and the positioning sleeve 351 are fixed together through screws or bolts. The lock wheel 71 is welded to the rotating shaft 31, and the limit cam 34 is also welded to the rotating shaft 31. A frame body convex part is arranged at the bottom of the connecting frame 1, and the two wire sleeves 11 are respectively connected on the frame body convex part. A link opening may be formed on the side wall of the link 1 corresponding to the locking wheel 71, so that the locking wheel 71 does not touch the side wall of the link 1 during the rotation when the rotation shaft 31 is installed near the side wall of the link 1.

The working principle is as follows: after the pull rope is pulled, the roller rotates, so that the roller drives the swinging rod to swing, the locking block is driven to rotate, the locking block is separated from the locking wheel, the pillow frame rotates under the action of the third torsion spring, and the headrest is folded. When the pillow frame is pushed by hand to rotate reversely until the pillow rod faces upwards, the locking wheel is buckled with the locking block again, and the pillow frame is locked.

Claims

1. The utility model provides a take collapsible headrest of stay cord, includes the pillow body (2), can install link (1) and pillow frame (3) on car seat, pillow frame (3) can set up on link (1) with rotating, the pillow body (2) are connected on pillow frame (3) be provided with on link (1) can with pillow frame (3) locking location on link (1) and can unblock the locking mechanical system of pillow frame (3) and pillow frame (3) unblock back drive pillow frame (3) pillow frame canceling release mechanical system that resets when stay cord (4) stimulate, its characterized in that: the connecting frame (1) is provided with a transmission mechanism, idler wheels (5) capable of rotating relative to the connecting frame (1) and a reset mechanism of the idler wheels (5), the pull rope (4) is composed of a plurality of wires, the lower ends of the plurality of wires penetrate through wire sleeves (11) connected to the connecting frame (1) and extend out of the connecting frame (1), the upper ends of the plurality of wires are respectively connected with the idler wheels (5), one end of the transmission mechanism is linked with the idler wheels (5), the other end of the transmission mechanism is linked with the locking mechanism, when one end of the pull rope (4) extending out of the connecting frame (1) is pulled, the pull rope (4) pulls the idler wheels (5) to rotate, the idler wheels (5) drive the locking mechanism to unlock the pillow frame (3) through the transmission mechanism, and when no pulling force exists on the pull rope (4), the reset mechanism of the idler wheels (5) drives the idler wheels (5) to.

2. The foldable headrest of claim 1, wherein: gyro wheel (5) can be connected on the lateral wall of link (1) rotatably through first pivot (51), the canceling release mechanical system of gyro wheel (5) is first torsional spring (52), first torsional spring (52) cover is put on first pivot (51), the one end of first torsional spring (52) is connected with gyro wheel (5), the other end of first torsional spring (52) is connected with link (1) be provided with spacing convex part (53) on the lateral wall of gyro wheel (5), be provided with on the corresponding lateral wall of link (1) and can push up and touch spacing convex part (53) and prevent gyro wheel (5) continuation pivoted arch (12).

3. The foldable headrest of claim 2, wherein: be provided with holding tank (54) on the another side of gyro wheel (5) relative with spacing convex part (53), first torsional spring (52) cover is put on the axis body of first pivot (51) that is arranged in holding tank (54), the one end of first torsional spring (52) is connected on holding tank (54) bottom surface, the other end of first torsional spring (52) is connected on link (1).

4. A foldable headrest according to any one of claims 1 to 3, characterized in that: the roller is characterized in that a first guide groove (55) and a second guide groove (56) are axially arranged on the circumference of the roller (5) at intervals, two wires are arranged, one end of a first wire (41) is fixed on the side wall of the roller (5), the other end of the first wire (41) penetrates through the first guide groove (55) and extends out of the connecting frame (1), one end of a second wire (42) is fixed on the side wall of the roller (5), and the other end of the second wire (42) penetrates through the second guide groove (56) and extends out of the connecting frame (1).

5. A foldable headrest according to any one of claims 1 to 3, characterized in that: the transmission mechanism comprises a swing rod (6), a reset mechanism of the swing rod (6) and a transmission piece (61), the middle of the swing rod (6) is rotatably connected to the connecting frame (1), a limiting notch (57) is formed in the side wall of the roller (5), one end of the swing rod (6) is abutted to the limiting notch (57), the other end of the swing rod (6) is movably connected with one end of the transmission piece (61), the other end of the transmission piece (61) is movably connected with a locking mechanism, when the roller (5) is pulled by the pull rope (4), the limiting notch (57) pushes the swing rod (6) to swing, the swing rod (6) drives the locking mechanism to unlock through the transmission piece (61), and when no pull force exists on the pull rope (4), the reset mechanism of the swing rod (6) drives the swing rod (6) to reset.

6. The foldable headrest of claim 5, wherein: the middle part of swinging arms (6) can be rotatably connected on the front side wall of the inner cavity of connecting frame (1) through second rotating shaft (62), idler wheels (5) can be rotatably connected on the front side wall of one side of the swinging arms (6), the reset mechanism of the swinging arms (6) is a second torsion spring (63), one end of the second torsion spring (63) is fixed on the connecting frame (1), and the other end of the second torsion spring (63) is buckled on the swinging arms (6).

7. The foldable headrest of claim 5, wherein: the middle part of the swing rod (6) connected with the second rotating shaft (62) is positioned on the left side of the gravity center of the swing rod (6), the roller (5) is positioned on the right side of the second rotating shaft (62), and the locking mechanism is positioned on the left side of the second rotating shaft (62).

8. A foldable headrest according to any one of claims 1 to 3, characterized in that: the pillow frame (3) is connected to the connecting frame (1) through a rotating shaft (31), the locking mechanism comprises a locking block (7), a locking wheel (71) and a reset torsion spring (72), the locking block (7) is connected to the side wall of the connecting frame (1) through a third rotating shaft (73), the reset torsion spring (72) is sleeved on the third rotating shaft (73), one end of the reset torsion spring (72) is connected with the connecting frame (1), the other end of the reset torsion spring (72) is connected with the locking block (7), the rotating end of the locking block (7) is connected with the transmission mechanism, the locking wheel (71) is concentrically connected on the rotating shaft (31), a limiting bulge (711) is arranged on the locking wheel (71), the limit projection (711) is provided with a notch part (74) which can be engaged with the rotating end of the locking block (7) to lock the pillow frame (3).

9. The foldable headrest of claim 8, wherein: the top surface of the rotating end of the locking block (7) is provided with an arc surface (75), and the bottom surface of the limiting bulge of the locking wheel (71) is an arc surface (76) which can be matched with the arc surface (75) of the rotating end.

10. The foldable headrest of claim 8, wherein: pillow frame canceling release mechanical system is third torsional spring (32) of cover setting on axis of rotation (31), the one end of third torsional spring (32) is connected on the spacing wheel body (33) of axis of rotation (31), the other end of third torsional spring (32) is connected on link (1), and when pillow frame (3) unblock back third torsional spring (32) drive pillow frame (3) reset, spacing wheel body (33) top touches and prevents pillow frame (3) to continue to rotate on link (1).