CN213082977U

CN213082977U - Adjustable seat headrest assembly

Info

Publication number: CN213082977U
Application number: CN202021920545.1U
Authority: CN
Inventors: 宋维; 邹路; 范茂国
Original assignee: Chongqing Hongli Xinbei Aisi Automobile Products Co ltd
Current assignee: Chongqing Honghui Auto Parts Co ltd
Priority date: 2020-08-13
Filing date: 2020-09-04
Publication date: 2021-04-30
Anticipated expiration: 2030-09-04
Also published as: CN112009336A

Abstract

The utility model discloses a seat headrest assembly with adjustable, including headrest skeleton assembly and headrest casing, headrest skeleton assembly includes angle adjustment mechanism, headrest branch and two bilateral symmetry's headrest pole, angle adjustment mechanism installs between two headrest pole upper ends, headrest branch is fixed in angle adjustment mechanism upper end, angle adjustment mechanism and headrest branch all are located the headrest casing, two the headrest casing is worn out downwards to the headrest pole, the headrest casing is put into the mould by headrest skeleton assembly and is passed through blowing integrated into one piece. The utility model discloses a headrest casing need not assemble alone through blowing integrated into one piece, and the uniformity is good, and the location is accurate.

Description

Adjustable seat headrest assembly

Technical Field

The utility model belongs to the seat headrest field, concretely relates to seat headrest assembly with adjustable.

Background

The headrest of the automobile seat is a device arranged for improving the comfort and the safety of passengers, in order to meet the habits of different drivers and passengers, the market provides a plurality of headrests capable of rotating forward and backward angles and four-way headrests with adjustable heights, the existing four-way headrest shell is generally composed of a front shell and a rear shell which are assembled on a headrest framework assembly, the assembly of the headrests is complex, and the number of parts is large.

SUMMERY OF THE UTILITY MODEL

To the above technical problem, the utility model aims at providing a casing need not the adjustable seat headrest assembly of assembly through blowing integrated into one piece.

Therefore, the utility model discloses the technical scheme who adopts does: the utility model provides a seat headrest assembly with adjustable, includes headrest framework assembly and headrest casing, headrest framework assembly includes angle adjustment mechanism, headrest branch and two bilateral symmetry's headrest pole, angle adjustment mechanism installs between two headrest pole upper ends, headrest branch is fixed in angle adjustment mechanism upper end, angle adjustment mechanism and headrest branch all are located the headrest casing, two the headrest casing is worn out downwards to the headrest pole, the headrest casing is put into the mould by headrest framework assembly and is passed through blowing integrated into one piece.

Preferably, the angle adjusting mechanism comprises a bracket, the bracket is rotatably mounted on a mounting shaft, two ends of the mounting shaft are respectively and fixedly connected with two headrest rods, a ratchet wheel is arranged on the bracket, a pawl bracket is arranged on the mounting shaft, a pawl matched with the ratchet wheel is rotatably arranged on the pawl bracket, a limit pin is arranged on the side surface of the pawl, the limit pin is matched with a limit hole on the bracket to limit the pawl, a bracket return torsion spring is arranged between the bracket and the pawl bracket, and a pawl return torsion spring is arranged between the pawl and the pawl bracket;

work as ratchet and pawl all are located initial position, ratchet and pawl meshing when external force drive headrest casing, make the support around installation axle rotation, ratchet and pawl cooperation realize the regulation of gear, when external force lasts the drive support and rotates to the spacer pin and receive the restriction in spacing hole, the pawl can't continue to rotate, the support drives the power that the pawl was overcome the pawl return torsional spring through the spacer pin and takes place the antiport, and the pawl is thrown away from with the ratchet, realizes the unblock, and when external force removes, the support gets 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 mesh with the ratchet once more. By adopting the structure, the angle adjusting mechanism has simple and reliable structure and is convenient to install and arrange; 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.

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.

As preferred, the installation axle comprises consecutive square shaft section, interlude and circle axle section, interlude diameter increase, be provided with the square hole that suits with the square shaft section on the pawl support, 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 axle section. 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 headrest rods are integrally formed and comprise vertical sections, a plurality of clamping grooves are formed in the vertical sections of the headrest rods, the vertical sections of the two headrest rods are bent towards the back upper side and inserted into the headrest shell, and then horizontally extend towards the mutually approaching direction, a square hole matched with the square shaft section is formed in the horizontal section of one headrest rod, a round hole matched with the round shaft section is formed in the horizontal section of the other headrest rod, and the square shaft section and the round shaft section are respectively inserted into the two headrest rods and are fixed through welding. By adopting the structure, the clamping groove is used for adjusting the height of the headrest rods, the mounting shaft is matched with the pin holes of the two headrest rods, the structure is stable and reliable, and the assembly precision is high.

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 utility model has the advantages that: the headrest shell is integrally formed through blow molding, independent assembly is not needed, the headrest shell is light in weight, good in strength performance, good in consistency and accurate in positioning.

Drawings

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

FIG. 2 is a schematic view of the exploded structure of the present invention;

FIG. 3 is a schematic view of a headrest frame assembly;

FIG. 4 is a schematic view of the angle adjustment mechanism with the ratchet and pawl engaged;

FIG. 5 is a schematic view of the angle adjustment mechanism in the unlocked state;

FIG. 6 is a schematic view of the positions of the ratchet, pawl and limiting hole in the initial state;

FIG. 7 is a schematic diagram of the positions of the ratchet, pawl and limiting hole when the inclination angle is maximum;

FIG. 8 is a schematic view of the positions of the ratchet, pawl and limit hole in the unlocked state;

fig. 9 is a schematic diagram of the positions of the ratchet wheel, the pawl and the limiting hole when the bracket returns.

Detailed Description

The invention will be further described by way of examples with reference to the accompanying drawings:

as shown in fig. 1 to 3, an adjustable seat headrest assembly comprises a headrest housing 12 and a headrest framework assembly, wherein the headrest framework assembly comprises a headrest rod 1, an angle adjusting mechanism and a headrest support rod 9, and 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 to 3, the headrest rods 1 are integrally formed, the two headrest rods 1 are oppositely arranged left and right, the headrest rods 1 include vertical sections 101, and a plurality of slots 101a are arranged on the vertical section 101 of one of the headrest rods 1 at intervals for adjusting the height of the headrest. The upper ends of the vertical sections 101 of the two headrest rods 1 are bent towards the rear upper side, inserted into the headrest shell 12 and then horizontally extended towards the mutually approaching direction, wherein a square hole is arranged on the horizontal section of one headrest rod 1, and a round hole is arranged on the horizontal section of the other headrest rod 1.

As shown in fig. 2 to 9, 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, the ratchet wheel 4, the pawl 6 and the pawl support 5 are installed between the first support 201 and the second support 202 and sequentially arranged from top to bottom, the ratchet wheel 4 is provided with a mounting hole and an anti-rotation positioning pin 401, the ratchet wheel 4 is fixed through a second rivet 11 penetrating through the mounting hole of the first support 201 and the ratchet wheel 4 and the second support 202, the anti-rotation positioning pin 401 is matched with a pin hole in the first support 201 and limits the ratchet wheel 4, and a plurality of ratchet teeth distributed in an arc shape are arranged at the bottom of the ratchet wheel 4. 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.

As shown in fig. 1 and 2, the headrest housing 12 is a plastic housing with a large bottom and a small top, and the headrest housing 12 is integrally molded by blow molding from a headrest frame assembly in a mold without separate assembly. The angle adjusting mechanism, the headrest support rod 9 and the horizontal sections of the two headrest rods 1 are all located in the headrest shell 12, and the bottom of the headrest shell 12 is provided with a through hole for the two headrest rods 1 to penetrate out.

The utility model discloses a service condition analysis: referring to fig. 6, when the ratchet 4 and the pawl 6 are both located at the initial position, the pawl 6 is engaged with one end of the ratchet 4, when an external force drives the headrest housing 12 to rotate the bracket 2 and the ratchet 4 around the mounting shaft 3, the engaged position of the ratchet 4 and the pawl 6 is changed to realize the adjustment of the gear, referring to fig. 7, when the external force continuously drives the bracket 2 to rotate until the pawl 6 is engaged with the other end of the ratchet 4, the limiting pin 601 is limited by the limiting hole 203, the pawl 6 cannot rotate continuously, but the ratchet 4 and the bracket 2 rotate continuously, the bracket 2 drives the pawl 6 to rotate reversely against the force of the pawl return torsion spring 8 through the limiting pin 601, so that the pawl 6 is disengaged from the ratchet 4, referring to fig. 8, the unlocking is realized, when the external force is removed, the bracket 2 returns to the initial external position under the driving of the bracket return torsion spring 7, and the pawl 6 returns to the initial, and again engages with the ratchet 4.

Claims

1. The utility model provides a seat headrest assembly with adjustable, includes headrest framework assembly and headrest casing (12), headrest framework assembly includes angle adjustment mechanism, headrest branch (9) and two bilateral symmetry's headrest poles (1), angle adjustment mechanism installs between two headrest poles (1) upper end, headrest branch (9) are fixed in the angle adjustment mechanism upper end, angle adjustment mechanism and headrest branch (9) all are located headrest casing (12), two headrest casing (12), its characterized in that are worn out downwards in headrest pole (1): the headrest shell (12) is placed into a mold through a headrest framework assembly and is integrally molded through blow molding.

2. The adjustable seat headrest assembly of claim 1, wherein: the angle adjusting mechanism comprises a support (2), the support (2) is rotatably mounted on a mounting shaft (3), two ends of the mounting shaft (3) are respectively and fixedly connected with two headrest rods (1), a ratchet wheel (4) is arranged on the support (2), a pawl support (5) is arranged on the mounting shaft (3), a pawl (6) matched with the ratchet wheel (4) is rotatably arranged on the pawl support (5), a limit pin (601) is arranged on the side surface of the pawl (6), the limit pin (601) is matched with a limit 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 shell (12) is driven by external force to enable the support (2) to rotate around the installation shaft (3), the ratchet wheel (4) is matched with the pawl (6) to realize gear adjustment, when the external force continuously drives the support (2) to rotate until the limit pin (601) is limited by the limit hole (203), the pawl (6) cannot rotate continuously, the support (2) drives the pawl (6) to overcome the force of the pawl return torsion spring (8) through the limit pin (601) to rotate reversely, 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) returns to the initial positions under the driving of the pawl return torsion spring (8), and engages with the ratchet wheel (4) again.

3. The adjustable seat headrest assembly of claim 2, 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).

4. The adjustable seat headrest assembly of claim 3, wherein: installation axle (3) comprises consecutive square shaft section (301), interlude (302) and circle shaft section (303), interlude (302) diameter increase, be provided with the square hole that suits with square shaft section (301) on pawl support (5), 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 shaft section (303).

5. The adjustable seat headrest assembly of claim 4, wherein: headrest pole (1) integrated into one piece, headrest pole (1) is including vertical section (101), be provided with draw-in groove (101a) that a plurality of upper and lower even interval arranged on vertical section (101) of headrest pole (1), vertical section (101) upper end of two headrest poles (1) all buckle and insert headrest casing (12) back to the back top, again to the direction level that is close to each other and extend, one of them be provided with in the horizontal segment of headrest pole (1) with square shaft section (301) complex square hole, another be provided with in the horizontal segment of headrest pole (1) with circle shaft section (303) complex round hole, square shaft section (301) and circle shaft section (303) insert respectively in two headrest poles (1) to through welded fastening.

6. The adjustable seat headrest assembly of 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.

7. The adjustable seat headrest assembly of claim 2, wherein: the ratchet wheel (4) is fixed on the support (2) through a second rivet (11).

8. The adjustable seat headrest assembly of claim 2, wherein: the lower end of the pawl (6) is provided with a cylindrical head (602), and the pawl (6) can be rotatably installed in a cylindrical hole of the pawl support (5) through the cylindrical head (602).