CN217892574U

CN217892574U - Headrest stepless adjusting mechanism and child safety seat

Info

Publication number: CN217892574U
Application number: CN202220980951.XU
Authority: CN
Inventors: 管晨彬; 曹文勇; 程飞
Original assignee: Ningbo Baby First Baby Products Co Ltd
Current assignee: Ningbo Baby First Baby Products Co Ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-11-25
Anticipated expiration: 2032-04-26

Abstract

The utility model provides a stepless adjustment mechanism of headrest and children's safety seat, stepless adjustment mechanism of headrest include the back of the chair, headrest and be used for the drive the headrest for the auto-lock drive assembly that the back of the chair reciprocated, auto-lock drive assembly includes worm and double gear, double gear includes worm wheel and the straight-teeth gear of coaxial setting, the worm with worm wheel transmission connects, the headrest be equipped with the spur rack that the straight-teeth gear meshing is connected. Stepless adjustment mechanism of headrest, the structure of connecting through worm and double gear's worm wheel transmission each other, reach the function of auto-lock drive assembly auto-lock, and owing to have self-locking function for the headrest really realizes stepless regulation's purpose, with the regulation of accomplishing the headrest arbitrary height, so that better satisfy user demand, owing to have self-locking function, need not the unblock when carrying out the operation of headrest altitude mixture control in addition, make the operation more simple and convenient.

Description

Headrest stepless adjusting mechanism and child safety seat

Technical Field

The utility model relates to a children's safety seat technical field particularly, relates to a headrest stepless adjusting mechanism and children's safety seat.

Background

The height of the headrest of a child safety seat is typically adjustable up and down to accommodate the seating of children of various ages. However, most of the existing headrest stepless adjusting mechanisms adopting a rack-and-pinion structure in the market do not have a self-locking function, so that the adjustment of gears with smaller gear spacing can be actually realized, and the stepless adjustment cannot be really realized.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one aspect among the above-mentioned problem, the utility model provides an at first provide a headrest stepless regulation mechanism, include the back of the chair, headrest and be used for the drive the headrest for the auto-lock drive assembly that the back of the chair reciprocated, auto-lock drive assembly includes worm and double gear, double gear includes worm wheel and the straight-teeth gear of coaxial setting, the worm with worm wheel transmission each other connects, the headrest be equipped with the spur rack that the straight-teeth gear meshing is connected.

Optionally, the back of the chair is equipped with the confession the first mounting hole of worm installation and confession the installation axle of double-deck gear installation, work as the worm install in the first mounting hole and double-deck gear install in when installing the axle, the worm with worm wheel transmission is connected.

Optionally, at least one of the two ends of the worm is connected with an adjusting knob, and the adjusting knob is exposed and arranged outside the chair back.

Optionally, the worm is provided with a hexagonal hole, and the adjusting knob is provided with a hexagonal shaft matched with the hexagonal hole.

Optionally, the chair further comprises a worm limiting cover connected with the chair back, the worm limiting cover is provided with a limiting rib, and the worm is provided with a limiting groove matched with the limiting rib.

Optionally, the chair back is provided with a slide rail, and the headrest is provided with a slide sheet matched with the slide rail.

Optionally, the back of the chair is equipped with the spout, the headrest is equipped with the second mounting hole, the second mounting hole is connected with the fastener, the headrest pass through the fastener with spout sliding connection.

Optionally, the fastener includes a pin shaft and a limiting piece, and the pin shaft penetrates through the second mounting hole and the chute in sequence and then is fastened and connected with the limiting piece.

Optionally, the number of chutes is two.

Compared with the prior art, the utility model provides a stepless adjusting mechanism of headrest, the structure of worm wheel transmission each other through worm and double gear connects reaches the function of auto-lock drive assembly auto-lock, and owing to have self-locking function for the headrest really realizes stepless regulation's purpose, with the regulation of accomplishing the arbitrary height of headrest, so that better satisfy user demand, owing to have self-locking function, need not the unblock when carrying out the high regulation operation of headrest in addition, make the operation more simple and convenient.

In addition, the utility model provides a child safety seat, include as above the stepless adjustment mechanism of headrest.

Compared with the prior art, children's safety seat and the stepless adjustment mechanism of above-mentioned headrest be the same for the advantage that prior art has, no longer describe here.

Drawings

FIG. 1 is a block diagram of a child safety seat according to an embodiment of the present invention;

fig. 2 is an exploded view of a child safety seat according to an embodiment of the present invention;

fig. 3 is a partial exploded view of a child safety seat according to an embodiment of the present invention;

fig. 4 is an exploded view of a headrest and fastener in accordance with an embodiment of the present invention;

fig. 5 is a rear view of a headrest according to an embodiment of the present invention;

fig. 6 is a structural diagram of a worm limit cover according to an embodiment of the present invention.

Description of reference numerals:

1. a chair back; 11. a first mounting hole; 12. installing a shaft; 13. a slide rail; 14. a chute; 2. a headrest; 21. straight rack; 22. sliding blades; 23. a second mounting hole; 3. a self-locking drive assembly; 31. a worm; 311. A hexagonal hole; 312. a limiting groove; 32. a double-layer gear; 321. a worm gear; 322. a spur gear; 4. adjusting a knob; 41. a hexagonal shaft; 5. a worm limit cover; 51. limiting ribs; 6. a fastener; 61. a pin shaft; 62. a limiting sheet.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it should be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on normal use of the product.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. The utility model discloses a be provided with coordinate system XYZ in the drawing of embodiment, wherein the forward of X axle represents the left, and the reverse of X axle represents right-hand, and the forward of Y axle represents the place ahead, and the reverse rear that represents of Y axle, and the forward of Z axle represents the top, and the reverse below that represents of Z axle.

The embodiment of the utility model provides a headrest stepless regulation mechanism combines fig. 1 to 5 to show, including the back of the chair 1, headrest 2 and be used for the drive headrest 2 for the auto-lock drive assembly 3 that the back of the chair 1 reciprocated, auto-lock drive assembly 3 includes worm 31 and double gear 32, double gear 32 includes worm wheel 321 and the spur gear 322 of coaxial setting, worm 31 with worm wheel 321 mutual transmission is connected, headrest 2 be equipped with spur rack 21 that spur gear 322 meshing is connected.

The worm 31 is a single-headed worm with only one spiral line, that is, the worm 31 rotates for one circle, the worm wheel 321 rotates for one tooth, the helix angle of the worm 31 is small, only the worm 31 can drive the worm wheel 321 to rotate, but the worm wheel 321 can not drive the worm 31 to rotate, when the worm 31 stops rotating, the worm wheel 321 gives a reverse sliding force to the worm 31, so that the worm 31 can not rotate reversely, and further the self-locking of the worm 31 is realized; the worm wheel 321 is a helical gear, and the length direction of the spur rack 21 is consistent with the up-down direction, so that when the worm 31 rotates, the up-down movement of the headrest 2 is realized by driving the spur gear 322 to rotate and the engagement of the spur gear 322 and the spur rack 21; the worm 31 is driven to rotate by an external force.

The stepless headrest adjusting mechanism in the embodiment has the advantages that the self-locking function of the self-locking driving assembly 3 is achieved through the mutual transmission connection structure of the worm 31 and the worm gear 321 of the double-layer gear 32, the purpose of stepless adjustment of the headrest 2 is really achieved due to the self-locking function, the adjustment of any height of the headrest 2 is completed, the user requirements are better met, in addition, due to the self-locking function, unlocking is not needed when the height adjustment operation of the headrest 2 is carried out, and the operation is simpler and more convenient.

Optionally, as shown in fig. 1, fig. 2, and fig. 3, the chair back 1 is provided with a first mounting hole 11 for mounting the worm 31 and a mounting shaft 12 for mounting the double-layer gear 32, and when the worm 31 is mounted in the first mounting hole 11 and the double-layer gear 32 is mounted in the mounting shaft 12, the worm 31 is in transmission connection with the worm gear 321.

Wherein, the length direction of the worm 31 is consistent with the left-right direction, the worm 31 can rotate in the first mounting hole 11 after being mounted in the first mounting hole 11, and the double-layer gear 32 can freely rotate relative to the mounting shaft 12 when being mounted on the mounting shaft 12; the worm wheel 321 is positioned above or below the worm 31, and when the worm 31 rotates under the driving of an external force, the worm wheel 321 can be driven to rotate, and meanwhile, the spur gear 322 of the double-layer gear 32 synchronously rotates to drive the spur rack 21 to move in the up-and-down direction, so that the height position of the headrest 2 can be adjusted; the axial position of the double-layer gear 32 is limited between the double-layer gear 32 and the mounting shaft 12 through a limit pin, so that the worm gear 321 can be ensured to be in effective transmission with the worm 31.

Optionally, as shown in fig. 1, 2, and 3, at least one of the two ends of the worm 31 is connected to an adjusting knob 4, and the adjusting knob 4 is exposed outside the chair back 1, so that a user can manually act on the adjusting knob 4 to perform a rotating operation.

Wherein, two adjusting knobs 4 are preferably arranged, that is, two ends of the worm 31 are respectively provided with one adjusting knob 4, and the two adjusting knobs 4 are respectively arranged at the left side and the right side of the chair back 1, so that a user can conveniently adjust the worm 31 from both sides; the adjusting knob 4 is in hard connection with the worm 31, the worm 31 can also synchronously rotate when the adjusting knob 4 rotates under the action of external force, and the worm 31 further drives the double-layer gear 32 to rotate; set up adjust knob 4 in the side of back of the chair 1, can solve the inconvenient problem of operation that the carriage space is little to lead to, promote user's use and experience.

Optionally, as shown in fig. 2 and fig. 3, the worm 31 is provided with a hexagonal hole 311, and the adjusting knob 4 is provided with a hexagonal shaft 41 which is matched with the hexagonal hole 311; hexagonal axle 41 and hexagonal hole 311 plug-in connection, simple to operate to realize spacing on the circumferential direction between adjust knob 4 and the worm 31 through the mutual cooperation of hexagonal axle 41 and hexagonal hole 311, in order to ensure that adjust knob 4 can rotate with worm 31 in step.

Optionally, as shown in fig. 2, fig. 3, and fig. 6, the seat back further includes a worm limiting cover 5 connected to the seat back 1, the worm limiting cover 5 is provided with a limiting rib 51, and the worm 31 is provided with a limiting groove 312 engaged with the limiting rib 51.

The worm limiting cover 5 and the chair back 1 are detachably connected through a snap connection or a screw connection, so that the worm 31 is conveniently detached and installed; the limiting groove 312 is arranged in the circumferential outer circumferential direction of the worm 31, and the limiting rib 51 on the worm limiting cover 5 is matched with the limiting groove 312 on the worm 31 to form the axial limiting of the worm 31.

Optionally, as shown in fig. 2, 4, and 5, the seat back 1 is provided with a slide rail 13, and the headrest 2 is provided with a slide piece 22 engaged with the slide rail 13.

Wherein, the direction of the slide rail 13 is consistent with the up-down direction, and the slide rail 13 and the slide sheet 22 which are mutually matched are arranged to play a role of guiding the up-down movement of the headrest 2; the left and right sides of the headrest 2 are respectively provided with a slide piece 22, so that the movement of the headrest 2 is more stable.

Optionally, as shown in fig. 2 to fig. 5, the seat back 1 is provided with a sliding slot 14, the headrest 2 is provided with a second mounting hole 23, the second mounting hole 23 is connected with a fastener 6, and the headrest 2 is slidably connected with the sliding slot 14 through the fastener 6.

The length direction of the sliding groove 14 is consistent with the vertical direction, the sliding groove 14 penetrates through the front and the back, the second mounting hole 23 also penetrates through the front and the back, the headrest 2 is connected with the sliding groove 14 after the fastening piece 6 penetrates through the second mounting hole 23, the fastening piece 6 can limit the position of the headrest 2 relative to the sliding groove 14 in the front and back direction, and the fastening piece 6 can freely move up and down in the sliding groove 14; in this embodiment, the fastener 6 restricts the displacement of the headrest 2 in the front-rear direction to improve the sliding stability and the connection strength, and the adjustment range of the headrest 2 can be changed by changing the length and the position of the slide groove 14.

Optionally, as shown in fig. 4 and 5, the fastening element 6 includes a pin 61 and a limiting piece 62, and the pin 61 sequentially passes through the second mounting hole 23 and the sliding slot 14 and then is fastened and connected to the limiting piece 62; the pin 61 penetrates through the second mounting hole 23 corresponding to the headrest 2 and the chute 14 of the chair back 1, and the limiting sheet 62 is tightly connected with the pin 61, so that the structure is simple and the assembly is convenient.

Optionally, as shown in fig. 4 and 5, the number of the sliding grooves 14 is two, two sliding grooves 14 are arranged at intervals, and the number of the corresponding fasteners 6 is also two, so that the sliding of the headrest 2 is more stable by arranging two sliding grooves 14.

Another embodiment of the present invention provides a child safety seat, comprising the above headrest stepless adjustment mechanism.

The children's safety seat in this embodiment, the structure of worm wheel 321 through worm 31 and double gear 32 mutual transmission connection reaches the function of auto-lock drive assembly 3 auto-lock, and owing to have self-locking function for headrest 2 really realizes infinitely variable control's purpose, in order to accomplish the regulation of 2 arbitrary heights of headrest, so that better satisfy user's demand, owing to have self-locking function, need not the unblock when carrying out 2 altitude mixture control operations of headrest in addition, make the operation more simple and convenient.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims

1. The utility model provides a stepless adjustment mechanism of headrest, its characterized in that includes back of the chair (1), headrest (2) and is used for the drive headrest (2) for auto-lock drive assembly (3) that back of the chair (1) reciprocated, auto-lock drive assembly (3) include worm (31) and double gear (32), double gear (32) are including worm wheel (321) and straight-teeth gear (322) of coaxial setting, worm (31) with worm wheel (321) interconnect connects, headrest (2) be equipped with straight rack (21) that straight-teeth gear (322) meshing is connected.

2. The headrest stepless adjustment mechanism according to claim 1, characterized in that the chair back (1) is provided with a first mounting hole (11) for mounting the worm (31) and a mounting shaft (12) for mounting the double-layer gear (32), and when the worm (31) is mounted in the first mounting hole (11) and the double-layer gear (32) is mounted in the mounting shaft (12), the worm (31) is in transmission connection with the worm gear (321).

3. The headrest stepless adjustment mechanism according to claim 1, characterized in that at least one of two ends of the worm (31) is connected with an adjustment knob (4), and the adjustment knob (4) is exposed and arranged outside the seat back (1).

4. The headrest stepless adjustment mechanism according to claim 3, characterized in that said worm (31) is provided with a hexagonal hole (311), and said adjustment knob (4) is provided with a hexagonal shaft (41) engaged with said hexagonal hole (311).

5. The headrest stepless adjustment mechanism according to claim 1, characterized by further comprising a worm limiting cover (5) connected with the chair back (1), wherein the worm limiting cover (5) is provided with a limiting rib (51), and the worm (31) is provided with a limiting groove (312) matched with the limiting rib (51).

6. The headrest stepless adjustment mechanism according to claim 1, characterized in that the chair back (1) is provided with a slide rail (13), and the headrest (2) is provided with a slide sheet (22) cooperating with the slide rail (13).

7. The headrest stepless adjustment mechanism according to any one of claims 1 to 6, characterized in that the chair back (1) is provided with a sliding groove (14), the headrest (2) is provided with a second mounting hole (23), the second mounting hole (23) is connected with a fastening piece (6), and the headrest (2) is slidably connected with the sliding groove (14) through the fastening piece (6).

8. The headrest stepless adjustment mechanism according to claim 7, characterized in that the fastening member (6) comprises a pin shaft (61) and a limiting plate (62), and the pin shaft (61) is fastened and connected with the limiting plate (62) after sequentially passing through the second mounting hole (23) and the sliding groove (14).

9. The headrest stepless adjustment mechanism according to claim 7, characterized in that the number of the slide grooves (14) is two.

10. A child safety seat comprising a headrest stepless adjustment mechanism according to any one of claims 1 to 9.