CN112009337A

CN112009337A - Headrest framework assembly with adjustable front and rear angles

Info

Publication number: CN112009337A
Application number: CN202010923550.6A
Authority: CN
Inventors: 宋维; 邹路; 范茂国
Original assignee: Chongqing Hongli Xinbei Aisi Automobile Products Co ltd
Current assignee: Magna Seating Research and Development Chongqing Co Ltd
Priority date: 2020-08-13
Filing date: 2020-09-04
Publication date: 2020-12-01
Anticipated expiration: 2040-09-04
Also published as: CN213082978U; CN112009337B

Abstract

The invention discloses a headrest framework assembly capable of adjusting a front-back angle, which comprises two headrest rods which are bilaterally and symmetrically arranged, wherein an angle adjusting mechanism is arranged between the two headrest rods, the angle adjusting mechanism comprises a support, the support can be rotatably arranged on an installation shaft, two ends of the installation shaft are respectively and fixedly connected with the two headrest rods, a headrest support rod is arranged at the upper end of the support, a ratchet wheel is arranged on the support, a pawl support is arranged on the installation shaft, a pawl matched with the ratchet wheel can be rotatably arranged on the pawl support, a limit pin is arranged on the side surface of the pawl and matched with a limit hole on the support to limit the pawl, a support return torsion spring is arranged between the support and the pawl support, and a pawl return torsion spring is arranged between the pawl and the pawl support. The invention has simple and reliable structure and convenient installation and arrangement; the adjustment of multiple gears is realized through the ratchet wheel and the pawl, the adjustment angle of each gear is small, and the overall comfort is improved.

Description

Headrest framework assembly with adjustable front and rear angles

Technical Field

The invention belongs to the field of seat headrests, and particularly relates to a headrest framework assembly capable of adjusting a front angle and a rear angle.

Background

A headrest of a car seat is a device provided to improve comfort and safety of a passenger. The existing headrest can only be adjusted in height and cannot be adjusted in angle, and the habits of different drivers and passengers cannot be met. Some rotatable angle's that release in the market headrest, inner structure is complicated, leads to angle adjustment mechanism outline size great, can not use widely on more passenger cars, and some headrest that possess the angle rotation function in addition, every grade angle regulation is big, and adjusts the sound big, and whole travelling comfort is not good.

Disclosure of Invention

In view of the above technical problems, the present invention aims to provide a headrest framework assembly with adjustable front and rear angles, which has a simple and reliable structure, a small adjustment angle for each gear, and is convenient to operate.

Therefore, the technical scheme adopted by the invention is as follows: a headrest framework assembly capable of adjusting front and rear angles comprises two headrest rods which are arranged in bilateral symmetry, an angle adjusting mechanism is arranged between the two headrest rods and comprises a support, the support can be rotatably installed on an installation shaft, two ends of the installation shaft are respectively fixedly connected with the two headrest rods, a headrest support rod is arranged at the upper end of the support, a ratchet wheel is arranged on the support, a pawl support is arranged on the installation shaft, a pawl matched with the ratchet wheel can be rotatably arranged on the pawl support, a limit pin is arranged on the side face of the pawl and matched with a limit hole in the support to limit the pawl, a support return torsion spring is arranged between the support and the pawl support, and a pawl return torsion spring is arranged between the pawl and the pawl support;

work as ratchet and pawl all are located initial position, ratchet and pawl meshing, when external drive headrest branch and support rotate around installation axle, ratchet and pawl cooperation realize the regulation of gear, and it rotates to last the drive support when external force, make the spacer pin receives the restriction in spacing hole, orders about the pawl overcomes the power of pawl return torsional spring and takes place to rotate, the pawl breaks away from with the ratchet, realizes the unblock, relieves when external force, the support is got back to initial external under the drive of support return torsional spring, the pawl also gets back to initial position under the drive of pawl return torsional spring to again with the ratchet meshing.

Preferably, the support includes first support and the second support of controlling relative arrangement, the upper end of first support and second support all outwards buckles, forms the installation face with headrest branch, the lower extreme of first support and second support links to each other through first rivet, ratchet, pawl and pawl support all are located between first support and the second support, and from the top down arranges in proper order, support return torsional spring overlaps and establishes on the installation axle to be located between first support and the second support. By adopting the structure, the mounting structure is stable and reliable, the arrangement is compact, and the occupied space is further reduced.

Preferably, the installation axle comprises square shaft section, interlude and circle shaft section that link to each other in proper order, the interlude diameter increases, be provided with the square hole that suits with the square shaft section on pawl support and one of them headrest poles, the square shaft section inserts in the square hole of this headrest poles, first support and pawl support cover are established on the square shaft section, support return torsional spring cover is established on the interlude, the second support cover is established on the circle shaft section, the circle shaft section inserts in the circle hole of another headrest poles. Structure more than adopting, the syllogic structural design of installation axle is ingenious, makes the assembly more convenient and fast, and pawl support mounting is on the square shaft section, and the assembly precision is high, and can effectively prevent changeing, and the interlude forms limit structure.

Preferably, the bottom of the ratchet wheel is provided with a plurality of ratchet wheel teeth distributed in an arc shape, the top of the pawl is provided with a plurality of pawl teeth distributed in an arc shape, when the pawl is meshed with the ratchet wheel, the pawl teeth are only meshed with part of the ratchet wheel teeth, and the limiting hole is of a parallelogram structure. By adopting the structure, the ratchet wheel is more stable and reliable when being meshed with the pawl, the distribution of the ratchet wheel teeth and the shape of the limiting hole are matched with the motion track of the pawl, and meanwhile, the limiting hole can play a limiting role on the pawl.

Preferably, the ratchet wheel is fixed on the bracket through a second rivet. By adopting the structure, the ratchet wheel is simpler and quicker to assemble, and has higher welding precision and higher assembly consistency compared with the prior art.

Preferably, the lower end of the pawl is provided with a cylindrical head, and the pawl is rotatably mounted in a cylindrical hole of the pawl support through the cylindrical head. By adopting the structure, the assembly of the pawl is simpler and more convenient, and the number of parts is small.

The invention has the beneficial effects that: the structure is simple and reliable, and the installation and the arrangement are convenient; the adjustment of multiple gears is realized through the ratchet wheel and the pawl, the adjustment angle of each gear is small, and the overall comfort is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a schematic view of the angle adjustment mechanism with the ratchet and pawl engaged;

FIG. 4 is a schematic structural view of the angle adjustment mechanism in the unlocked state;

FIG. 5 is a schematic view of the positions of the ratchet, pawl and limiting hole in the initial state;

FIG. 6 is a schematic diagram of the positions of the ratchet, pawl and limiting hole when the inclination angle is maximum;

FIG. 7 is a schematic view of the positions of the ratchet, pawl and limiting hole in the unlocked state;

fig. 8 is a schematic view of the state of the ratchet wheel, the pawl and the limiting hole when the bracket returns.

Detailed Description

The invention will be further illustrated by the following examples in conjunction with the accompanying drawings:

as shown in fig. 1 to 8, a headrest framework assembly capable of adjusting a front-rear angle mainly comprises a headrest rod 1, an angle adjusting mechanism and a headrest support rod 9, wherein the angle adjusting mechanism comprises a support 2, an installation shaft 3, a ratchet 4, a pawl support 5, a pawl 6, a support return torsion spring 7, a pawl return torsion spring 8, a first rivet 10 and a second rivet 11.

As shown in fig. 1 and 2, the two headrest rods 1 are oppositely arranged left and right and vertically extend, the upper ends of the two headrest rods 1 are bent towards the back and the upper side and then horizontally extend towards the direction close to each other, and the vertical section of one headrest rod 1 is provided with clamping grooves which are uniformly arranged at intervals up and down and used for adjusting the height of the headrest. A square hole is arranged on the horizontal section of one of the headrest rods 1, and a round hole is arranged on the horizontal section of the other headrest rod 1.

As shown in fig. 1 to 8, angle adjustment mechanism installs between the horizontal segment of two headrest poles 1, angle adjustment mechanism includes installation axle 3, installation axle 3 can be ordinary round axle, installation axle 3 is preferred to be by consecutive square shaft section 301 in this embodiment, interlude 302 and circle shaft section 303 are constituteed, interlude 302 is the round axle of diameter increase, play spacing effect, the one end that square shaft section 301 and circle shaft section 303 kept away from each other is inserted respectively in the horizontal segment that corresponds headrest poles 1, the rethread welding is fixed, mounting structure is reliable and stable.

Further, the support 2 can be rotatably installed on the installation axle 3, the support 2 includes the first support 201 and the second support 202 of controlling relative arrangement, first support 201 and second support 202 are platelike structure, first support 201 is installed on square shaft section 301 through the installation round hole, the second support 202 is installed on round shaft section 303 through the installation round hole, be provided with spacing hole 203 on the second support 202, spacing hole 203 is the parallelogram structure, the lower part of second support 202 is buckled downwards again after outwards buckling, the installation of the support return torsional spring 7 of being convenient for. The upper ends of the first support 201 and the second support 202 are bent outwards to form a mounting surface with the headrest support rod 9, the headrest support rod 9 is welded above the bending sections of the first support 201 and the second support 202, and the headrest support rod 9 serves as an extension body of the support 2, so that the support 2 can rotate conveniently, and the headrest shell can be supported. The bottoms of the first bracket 201 and the second bracket 202 are connected through the first rivet 10, and the structure is stable and reliable.

Further, ratchet 4, pawl 6 and pawl support 5 are installed and are located between first support 201 and second support 202, and from the top down arranges in proper order, are provided with the mounting hole on the ratchet 4 and prevent changeing the locating pin, and ratchet 4 is fixed through the second rivet 11 that passes first support 201, the mounting hole of ratchet 4 and second support 202, prevents changeing the pinhole cooperation on locating pin and the first support 201, and is spacing to ratchet 4, and the bottom of ratchet 4 is provided with a plurality of ratchet teeth that are arc distribution. Pawl support 5 passes through the installation square hole and installs on square shaft section 301, effectively prevent changeing, it is spacing through first support 201 and middle section 302 simultaneously left and right sides, avoid pawl support 5 along installation axle 3 axial displacement, the lower extreme of pawl 6 is provided with cylinder head 602, pawl 6 can install in the cylinder hole of pawl support 5 through cylinder head 602 with rotating, the top of pawl 6 is provided with the pawl tooth that a plurality of arcs distribute, when pawl 6 meshes with ratchet 4, the pawl tooth only meshes with partial ratchet tooth, the engagement state is reliable and stable, the regulation of eleven gears can be realized between pawl 6 and the ratchet 4 of this embodiment, be provided with spacer pin 601 on pawl 6, spacer pin 601 cooperates with spacing hole 203 on the support 2, it is spacing to pawl 6. A support return torsion spring 7 is arranged between the support 2 and the pawl support 5 and used for driving the support 2 to return, the support return torsion spring 7 is sleeved on the middle section 302 and is positioned between the first support 201 and the second support 202, one end of the support return torsion spring 7 is inserted into the spring mounting hole of the pawl support 5, and the other end of the support return torsion spring is clamped in the spring clamping groove of the second support 202. A pawl return torsion spring 8 is arranged between the pawl 6 and the pawl support 5, the pawl return torsion spring 8 enables the pawl 6 to always have the upward rotating trend, and two ends of the pawl return torsion spring 8 are respectively clamped in spring clamping grooves of the pawl 6 and the pawl support 5.

The use state analysis of the invention: when the ratchet wheel 4 and the pawl 6 are both located at the initial position, referring to fig. 5, the pawl 6 is engaged with one end of the ratchet wheel 4, when the headrest strut 9 and the bracket 2 are driven by external force to rotate around the mounting shaft 3, the engaged position of the ratchet wheel 4 and the pawl 6 is changed, gear adjustment is realized, when the bracket 2 is continuously driven by the external force to rotate until the pawl 6 is engaged with the other end of the ratchet wheel 4, referring to fig. 6, the pawl 6 cannot continuously rotate due to the limitation of the limiting hole 203 of the limiting pin 601, but the ratchet wheel 4 and the bracket 2 continuously rotate, the bracket 2 drives the pawl 6 to reversely rotate by overcoming the force of the pawl return torsion spring 8 through the limiting pin 601, so that the pawl 6 is disengaged from the ratchet wheel 4, referring to fig. 7, unlocking is realized, when the external force is released, the bracket 2 returns to the initial position under the driving of the bracket return torsion spring 7, and again engages with the ratchet 4.

Claims

1. The utility model provides a headrest skeleton assembly of angle around adjustable, includes two bilateral symmetry's headrest pole (1), its characterized in that: an angle adjusting mechanism is arranged between the two headrest rods (1), the angle adjusting mechanism comprises a support (2), the support (2) can be rotatably installed on an installation shaft (3), two ends of the installation shaft (3) are respectively fixedly connected with the two headrest rods (1), a headrest support rod (9) is arranged at the upper end of the support (2), a ratchet wheel (4) is arranged on the support (2), the ratchet wheel (4) is fixed on the support (2) through a second rivet (11), a pawl support (5) is arranged on the installation shaft (3), a pawl (6) matched with the ratchet wheel (4) can be rotatably arranged on the pawl support (5), a cylindrical head (602) is arranged at the lower end of the pawl (6), and the pawl (6) can be rotatably installed in a cylindrical hole of the pawl support (5) through the cylindrical head (602), a limiting pin (601) is arranged on the side face of the pawl (6), the limiting pin (601) is matched with a limiting hole (203) in the support (2) to limit the pawl (6), a support return torsion spring (7) is arranged between the support (2) and the pawl support (5), and a pawl return torsion spring (8) is arranged between the pawl (6) and the pawl support (5);

when the ratchet wheel (4) and the pawl (6) are both located at initial positions, the ratchet wheel (4) is meshed with the pawl (6), when the headrest supporting rod (9) and the support (2) are driven by external force to rotate around the installation shaft (3), the ratchet wheel (4) is matched with the pawl (6) to realize adjustment of gears, when the support (2) is continuously driven by the external force to rotate until the limiting pin (601) is limited by the limiting hole (203), the pawl (6) cannot continuously rotate, the support (2) drives the pawl (6) to overcome the force of the pawl return torsion spring (8) through the limiting pin (601) to reversely rotate, the pawl (6) is separated from the ratchet wheel (4) to realize unlocking, when the external force is relieved, the support (2) returns to the initial external position under the driving of the support return torsion spring (7), and the pawl (6) also returns to the initial positions under the driving of the pawl return torsion spring (8), and engages with the ratchet wheel (4) again.

2. The adjustable fore-aft angle headrest frame assembly as claimed in claim 1, wherein: support (2) including controlling relative first support (201) and second support (202) of arranging, the upper end of first support (201) and second support (202) is all outwards buckled, forms the installation face with headrest branch (9), the lower extreme of first support (201) and second support (202) links to each other through first rivet (10), ratchet (4), pawl (6) and pawl support (5) all are located between first support (201) and second support (202), and from the top down arranges in proper order, support return torsional spring (7) cover is established on installation axle (3) to be located between first support (201) and second support (202).

3. The adjustable fore-aft angle headrest frame assembly as claimed in claim 2, wherein: install axle (3) and constitute by consecutive square shaft section (301), interlude (302) and circle axle section (303), interlude (302) diameter increase, be provided with the square hole that suits with square shaft section (301) on pawl support (5) and one of them headrest bars (1), square shaft section (301) are inserted in the square hole of this headrest bars (1), first support (201) and pawl support (5) cover are established on square shaft section (301), support return torsional spring (7) cover is established on interlude (302), second support (202) cover is established on circle axle section (303), circle axle section (303) are inserted in the round hole of another headrest bars (1).

4. The adjustable fore-aft angle headrest frame assembly as claimed in claim 2, wherein: the ratchet wheel is characterized in that a plurality of ratchet wheel teeth distributed in an arc shape are arranged at the bottom of the ratchet wheel (4), a plurality of pawl teeth distributed in an arc shape are arranged at the top of the pawl (6), when the pawl (6) is meshed with the ratchet wheel (4), the pawl teeth are only meshed with part of the ratchet wheel teeth, and the limiting hole (203) is of a parallelogram structure.