SEAT POSITION-ADJUSTING DEVICE FOR A HIGHCHAIR

Abstract

A seat position-adjusting device is used to connect adjustably a seat to a leg unit of a highchair, and includes a tube component, a slide seat and a locking unit. The tube component is sleeved on the leg unit, and is formed with positioning holes aligned along a tube axis. The slide seat is sleeved on the tube component, and is connected to the seat. The locking unit includes a latch disposed in the slide seat, pivoted to the slide seat, and pivotable between locking and unlocking positions to engage and disengage a selected positioning hole to thereby selectively lock and unlock the slide seat relative to the tube component.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings, of which:

FIG. 1 is a perspective view of a highchair that incorporates the first preferred embodiment of a seat position-adjusting device according to the present invention, illustrating a seat of the highchair at a highest position;

FIG. 2 is an assembled perspective view of the first preferred embodiment;

FIG. 3 is an exploded perspective view of the first preferred embodiment;

FIG. 4 is a view similar to FIG. 1, but illustrating the seat of the highchair after a downward adjustment operation;

FIG. 5 is a fragmentary sectional view of the first preferred embodiment to illustrate a locking position of a latch of a locking unit;

FIG. 6 is a fragmentary sectional view of the first preferred embodiment to illustrate an unlocking position of the latch;

FIG. 7 is a schematic side view of a highchair that incorporates the second preferred embodiment of a seat position-adjusting device according to the present invention, illustrating a seat of the highchair at a highest position;

FIG. 8 is a view similar to FIG. 7, but illustrating the seat of the highchair after a downward adjustment operation;

FIG. 9 is an assembled perspective view of the second preferred embodiment;

FIG. 10 is an exploded perspective view of the second preferred embodiment;

FIG. 11 is a fragmentary sectional view of the second preferred embodiment to illustrate a locking position of a latch of a locking unit;

FIG. 12 is a fragmentary sectional view of the second preferred embodiment to illustrate an unlocking position of the latch;

FIG. 13 is a schematic side view of a highchair that incorporates the third preferred embodiment of a seat position-adjusting device according to the present invention, illustrating a seat of the highchair at a highest position;

FIG. 14 is a view similar to FIG. 13, but illustrating the seat of the highchair after a downward adjustment operation;

FIG. 15 is an exploded perspective view of the third preferred embodiment;

FIG. 16 is a fragmentary assembled perspective view of the third preferred embodiment;

FIG. 17 is a fragmentary sectional view of the third preferred embodiment taken along line 17-17 of FIG. 16, illustrating a locking position of a latch of a locking unit; and

FIG. 18 is a fragmentary sectional view of the third preferred embodiment to illustrate an unlocking position of the latch.

Claims

1. A seat position-adjusting device for connecting adjustably a seat to a leg unit of a highchair, said seat position-adjusting device comprising: a tube component adapted to be sleeved on the leg unit and formed with a plurality of spaced apart positioning holes aligned along a tube axis;a slide seat sleeved on said tube component and adapted to be connected to the seat; anda locking unit including a latch disposed in said slide seat, pivoted to said slide seat, and pivotable between a locking position, where said latch engages a selected one of said positioning holes in said tube component to lock said slide seat onto said tube component, and an unlocking position, where said latch is disengaged from said positioning holes in said tube component to unlock said slide seat from said tube component.

2. The seat position-adjusting device as claimed in claim 1, wherein said latch is formed with a positioning tooth for engaging the selected one of said positioning holes in said tube component.

3. The seat position-adjusting device as claimed in claim 2, wherein said positioning tooth has a tapering shape with a first contact side that abuts against a periphery of the selected one of said positioning holes when said latch is at the locking position, and a second contact side connected to said first contact side and inclined relative to said first contact side.

4. The seat position-adjusting device as claimed in claim 1, wherein said tube component includes a tube body adapted to be sleeved on and to be fixed to the leg unit, and a guide rail that projects radially outward from said tube body, that extends parallel to the tube axis, and that is formed with said positioning holes.

5. The seat position-adjusting device as claimed in claim 4, wherein said slide seat includes a hollow seat body that accommodates said latch therein and that is formed with a rail groove to receive slidably said guide rail.

6. The seat position-adjusting device as claimed in claim 5, wherein said latch is formed with a positioning tooth for engaging the selected one of said positioning holes in said tube component, said seat body having a wall part confining said rail groove and formed with a slit that is parallel to the tube axis and that permits extension of said positioning tooth therethrough to engage the selected one of said positioning holes so as to lock said seat body onto said tube component.

7. The seat position-adjusting device as claimed in claim 5, wherein said guide rail has a T-shaped cross-section along a plane transverse to the tube axis, said rail groove having a shape corresponding to the cross-section of said guide rail.

8. The seat position-adjusting device as claimed in claim 1, wherein said locking unit further includes an actuator connected to said latch and operable so as to drive movement of said latch from the locking position to the unlocking position.

9. The seat position-adjusting device as claimed in claim 8, wherein said latch and said actuator are connected fixedly to each other and are pivotally retained on said slide seat.

10. The seat position-adjusting device as claimed in claim 8, wherein said locking unit further includes an urging member for accumulating a restoring force when said latch is moved from the locking position to the unlocking position.

11. The seat position-adjusting device as claimed in claim 10, wherein said actuator includes a press part accessible externally of said slide seat, said urging member including a compression spring having opposite ends abutting respectively against said press part and said slide seat.

12. The seat position-adjusting device as claimed in claim 1, wherein said tube component includes an upper sleeve part adapted to be sleeved on the leg unit, a lower sleeve part adapted to be sleeved on the leg unit and spaced apart from said upper sleeve part, and a tubular rod extending between said upper and lower sleeve parts, adapted to be disposed adjacent to the leg unit, and formed with said positioning holes.

13. The seat position-adjusting device as claimed in claim 12, wherein said slide seat includes a hollow first seat body that is adapted to be connected fixedly to the seat, and that is formed with a slide groove to connect slidably with said tubular rod.

14. The seat position-adjusting device as claimed in claim 13, wherein said slide seat further includes a hollow second seat body mounted in said first seat body and having said latch disposed therein.

15. The seat position-adjusting device as claimed in claim 10, wherein said actuator includes a press part accessible externally of said slide seat, said urging member including a resilient strip formed integrally with said press part, said resilient strip having a distal end abutting against said slide seat.

16. The seat position-adjusting device as claimed in claim 12, wherein said slide seat includes a hollow seat body that is adapted to be coupled movably to the leg unit and that is connected slidably to said tubular rod, said latch being pivotally retained on said seat body and being extendible through said seat body to engage the selected one of said positioning holes.

17. A highchair comprising: a pair of front legs;a pair of rear legs connected pivotally to upper ends of said front legs;a seat; anda seat position-adjusting device for connecting adjustably said seat to said front legs, said seat position-adjusting device including a tube component sleeved on one of said front legs and formed with a plurality of spaced apart positioning holes aligned along a tube axis,a slide seat sleeved on said tube component and connected to said seat, anda locking unit including a latch disposed in said slide seat, pivoted to said slide seat, and pivotable between a locking position, where said latch engages a selected one of said positioning holes in said tube component to lock said slide seat onto said tube component, and an unlocking position, where said latch is disengaged from said positioning holes in said tube component to unlock said slide seat from said tube component;wherein said highchair is convertible from an unfolded state to a folded state, where said front and rear legs are pivoted toward each other and where said tube component is moved along said one of said front legs.

18. The highchair as claimed in claim 17, wherein said tube component includes an upper sleeve part sleeved on said one of said front legs, a lower sleeve part sleeved on said one of said front legs and spaced apart from said upper sleeve part, and a tubular rod extending between said upper and lower sleeve parts, disposed adjacent to said one of said front legs, and formed with said positioning holes.

19. The highchair as claimed in claim 17, wherein said locking unit further includes an actuator connected to said latch and operable so as to drive movement of said latch from the locking position to the unlocking position.

20. The highchair as claimed in claim 17, wherein said locking unit further includes an urging member for accumulating a restoring force when said latch is moved from the locking position to the unlocking position.