CN220109466U - Automatic back-following mechanism of seat and seat with same - Google Patents

Abstract

The utility model discloses an automatic back-following mechanism of a seat and the seat with the same; the seat automatic back-following mechanism comprises a seat back, a linkage mechanism and a pressure acting piece; the linkage mechanism is connected with the seat backrest, and the pressure acting piece acts on the linkage mechanism through sliding pressing; the linkage mechanism drives the seat back to move through linkage under the action of the pressure acting piece. The seat automatic back-following mechanism can automatically adjust the position of the seat back under the action of pressure so as to adapt to the position of a human body, and can automatically reset or lock the position of the seat back according to the requirement.

Description

Automatic back-following mechanism of seat and seat with same

Technical Field

The utility model relates to the technical field of seats, in particular to an automatic seat back-following mechanism and a seat with the same.

Background

The study seat is used as a seat for accompanying children to study, and plays a very important role in the process of children growth study. Among various child learning seats, the child learning seat with an adjustable seat back is convenient to use because the seat back can be adjusted according to actual needs of children, so that the application of the child learning seat is more and more extensive. The adjustable seat backs on the market at present are generally realized by manually adjusting the position of the seat back; the mode of manually adjusting the seat back needs the human body to adjust the position many times to adapt to the back, is difficult to realize independently adjusting.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide an automatic back-following mechanism of a seat. The seat automatic back-following mechanism can automatically adjust the position of the seat back under the action of pressure so as to adapt to the position of a human body, and can automatically reset or lock the position of the seat back according to the requirement.

In order to achieve the technical purpose and the technical effect, the utility model is realized by the following technical scheme:

an automatic back-following mechanism of a seat comprises a seat back, a linkage mechanism and a pressure acting piece; the linkage mechanism is connected with the seat backrest, and the pressure acting piece acts on the linkage mechanism through sliding pressing; the linkage mechanism drives the seat back to move through linkage under the action of the pressure acting piece.

Further, the pressure acting member is connected with a cushion fixing plate for fixing the cushion.

Further, the linkage mechanism comprises a transverse swing arm, a vertical swing arm and a transverse sliding rod, wherein the lower end of the vertical swing arm is movably connected with the rear end of the transverse swing arm; the upper end of the vertical swing arm is movably connected with one end of the transverse slide bar; the transverse slide bar is connected with the seat backrest.

Furthermore, the front end of the transverse swing arm is movably connected with a transverse bracket.

Furthermore, the transverse support is also connected with a vertical support, and the upper end of the vertical support is in sliding fit with the transverse sliding rod.

Furthermore, a sliding groove extending transversely along the transverse sliding rod is arranged on the transverse sliding rod, a sliding block is arranged at the upper end of the vertical support, and the sliding block is in sliding fit with the sliding groove.

Furthermore, a limiting seat is also arranged on the transverse support, a limiting groove is formed in the limiting seat, and the pressure acting piece can be arranged in the limiting groove in a relatively movable mode.

Further, the lower part of the pressure acting piece is connected with a limiting piece, and the limiting piece limits the upward movement of the pressure acting piece.

Further, the automatic back-following mechanism of the seat also comprises a locking knob which acts on the linkage mechanism to lock the linkage mechanism.

Further, the automatic back-following mechanism of the seat also comprises a reset elastic piece, and the reset elastic piece acts on the linkage mechanism.

The utility model further provides a seat, which is provided with the seat automatic back-following mechanism; wherein the transverse bracket is connected with the chair leg of the chair.

The beneficial effects of the utility model are as follows:

when the back cushion is used, a user only needs to sit on the cushion of the seat, pressure can be transmitted to the linkage mechanism through the pressure acting piece, and after the linkage mechanism receives the pressure, the seat back is driven to move forwards through linkage so as to be attached to the back of a human body. Moreover, after the backrest is attached to the back of the human body, the linkage mechanism automatically stops moving, so that the backrest automatically adapts to the back of the human body and is automatically adjusted. When the human body leaves the cushion of the seat, the seat back can automatically reset to the farthest end, and the position of the seat back can be locked by the locking knob after the position of the seat back is adjusted, so that the self-adaptability of the adjustment of the seat back is improved.

The utility model can realize the automatic adjustment of the seat back, is convenient to adjust, and can facilitate the self-adaptive adjustment of the seat back according to the self-requirements of a user.

Drawings

FIG. 1 is a side view of the automatic seat back-following mechanism of the present utility model.

Fig. 2 is a schematic perspective view of the automatic back-following mechanism of the present utility model.

Fig. 3 is a schematic view showing a structure of the automatic seat back-following mechanism of the present utility model with a part thereof removed.

Fig. 4 is another schematic view of the automatic seat back-following mechanism of the present utility model with a part of the structure removed.

Fig. 5 is a schematic structural view of a pressure acting element in the automatic seat back-following mechanism of the present utility model.

Fig. 6 is a schematic structural view of a seat having the automatic seat back-following mechanism.

In the figure, 1: a seat back; 2: linkage mechanism, 21: swing arm, 22: vertical swing arm, 23: transverse slide bar, 231: a chute; 3: pressure acting element, 31: limiting piece, 32: clamping the convex points; 4: transverse support, 41: limit seat, 411: limit groove, 42: limit bushing, 43: reset elastic piece, 44: a connecting shaft; 5: vertical support, 51: a slide block; 6: cushion fixing plate, 61: an extension mounting portion; 7: a locking knob; 8: a cushion; 9: chair legs.

Detailed Description

The following detailed description of the utility model is presented in conjunction with the accompanying drawings to provide those skilled in the art with a better understanding of the advantages and features of the utility model, and to provide a clearer and more definite definition of the scope of the utility model.

The preferred embodiment of the automatic back-following mechanism for a seat as shown in fig. 1 to 5 comprises a seat back 1, a linkage mechanism 2 and a pressure acting member 3; the linkage mechanism 2 is connected with the seat backrest 1, and the pressure acting piece 3 acts on the linkage mechanism 2 through sliding pressing; the linkage mechanism 2 drives the seat back 1 to move through linkage under the action of the pressure acting piece 3.

Specifically, the linkage mechanism comprises a horizontal swing arm 21, a vertical swing arm 22 and a horizontal slide bar 23; in the embodiment, the transverse swing arm is of a 21 square tube structure; the vertical swing arm 22 is of a bent arm structure; the transverse slide bar 23 is of a T-shaped structure as a whole, and the rear part of the transverse slide bar is of a U-shaped structure; the lower end of the vertical swing arm 22 is hinged with the rear end of the horizontal swing arm 21 through a hinge shaft, and is matched with the swing of the vertical swing arm, and the rear end of the horizontal swing arm 21 is provided with an avoidance groove matched with the lower end of the vertical swing arm 22; the upper end of the vertical swing arm 22 is hinged with the rear end of the transverse slide bar 23 through a hinge shaft; the front end of the transverse slide bar 23 is fixedly connected with the seat back 1.

The front end of the transverse swing arm 21 is rotatably connected with the front end of a transverse bracket 4. More specifically, the transverse bracket 4 has a U-shaped structure, and the transverse swing arm 21 is disposed in the U-shaped cavity of the transverse bracket 4.

Two sides of the transverse bracket 4 are fixedly connected with a vertical bracket 5 respectively, and the upper end of the vertical bracket 5 is provided with a sliding block 51; the two sides of the transverse slide bar 23 are respectively provided with a sliding groove 231 which transversely extends (horizontally extends) along the transverse slide bar 23; the two vertical brackets 5 respectively arranged at two sides of the transverse slide bar 23 are respectively in sliding fit with the sliding grooves 231 of the transverse slide bar 23 through the sliding blocks 51. The lateral slide bar 23 slides in the horizontal direction with the slider 51 and the slide groove 231 engaged, so that the seat back 1 moves forward and backward in the horizontal direction.

The cushion fixing plate 6 for fixing the cushion has an extension mounting portion 61 at the bottom thereof, and the pressure applying member 3 is connected to the extension mounting portion 61. More specifically, the extension mounting portion 61 has a mounting cavity, a clamping hole is formed in the mounting cavity, a clamping bump 32 is formed on a side wall of the pressure acting member 3, the pressure acting member 3 is inserted into the mounting cavity of the extension mounting portion 61 of the cushion fixing plate 6, and the clamping bump 32 is clamped with the clamping hole of the extension mounting portion.

A limiting seat 41 is also arranged on the transverse bracket 4, and the limiting seat 41 is of a U-shaped structure; the limiting seat 41 is buckled on the transverse bracket 4; the top side of the limiting seat 41 is provided with a limiting slot 411, and a limiting bushing 42 extending downwards from the top side of the limiting seat is also arranged at the limiting slot 411. The pressure acting element 3 is mounted in the limit slot 411, and can move up and down in cooperation with the limit bushing 42, and can act on the swing arm 21 located in the U-shaped cavity of the lateral bracket 4. As shown in fig. 5, two sides of the lower part of the pressure acting member 3 are respectively connected with a limiting member 31, and the limiting member 31 can stop on the limiting bushing 42 when the pressure acting member 3 moves upwards, so as to limit the pressure acting member 3.

In addition, the bottom of the pressure acting piece 3 (the part acting on the swing arm) is of an arc-shaped structure; the arc-shaped structure of the pressure acting piece 3 acts on the transverse swing arm 21, so that the cushion fixing plate 6 is prevented from inclining along with the transverse swing arm 21 while the transverse swing arm 21 swings, and the cushion is always in a horizontal state.

The U-shaped cavity of the transverse bracket 4 is provided with a reset elastic piece 43, and the reset elastic piece 43 can act on the transverse swing arm 21 of the linkage mechanism 2. The pressure acting member 3 moves downward and acts on the yaw arm 21 so that the yaw arm 21 can swing, and thus the whole linkage mechanism acts. The elastic force of the return elastic member 43 acts on the swing arm 21 so that the link mechanism 2 is elastically swung, and the return elastic member 43 can also return the link mechanism 2 to return the seat back 1 when the pressure acting member 3 does not apply pressure to the swing arm 21. In the present embodiment, the return elastic member 43 is a torsion spring laterally disposed in the U-shaped cavity of the lateral bracket 4. More specifically, the front end of the transverse bracket 4 is connected with a connecting shaft 44, a torsion spring is sleeved on the connecting shaft 44, and the torsion spring is positioned below the transverse swing arm 21; the torsion spring acts on the swing arm 21 by elasticity.

In other embodiments, the return elastic member 43 may also be a vertically arranged spring, more specifically, the spring is vertically arranged in the U-shaped cavity of the transverse bracket 4 and below the transverse swing arm 21; the spring acts on the transverse swing arm through elasticity.

The seat automatic back-following mechanism also comprises a locking knob 7; a locking groove is formed in the side part of the transverse bracket 4, and the locking groove is of a vertically arranged oblong structure; corresponding to the locking groove, a locking hole is arranged on the transverse swing arm 21; the locking knob 7 can be locked in the locking groove and the locking hole to lock the linkage mechanism 2.

A seat with the seat automatic back-following mechanism as shown in fig. 6. The seat comprises a cushion 8, a seat back 1 and chair legs 9; wherein the transverse support 4 is connected to the legs 9 of the seat.

The initial position of the seat back 1 is at the rearmost end, and the initial position of the cushion fixing plate 6 is at the uppermost end; when a user sits on the seat cushion 8 of the seat, the cushion fixing plate 6 is pressed downwards by gravity, the pressure acting piece 3 slides downwards, pressure is transmitted to the transverse swing arm 21, the transverse swing arm 21 swings downwards to drive the vertical swing arm 22 to swing, and accordingly the transverse slide rod 23 is driven to slide forwards, so that the seat backrest 1 moves forwards and is attached to the back of a human body. After the seat back 1 is completely attached to the human back, the linkage mechanism 2 stops moving, so that the seat back adjustment automatically adapting to the human back is realized.

When the human body leaves the seat cushion 8, the seat back 1 automatically resets to the most distal end under the action of the reset elastic member 43; thus, after different users sit on the seat, the self-adaptive seat back can be adjusted according to different body types of the users; alternatively, after the seat back is attached to the back of the human body, that is, after the position of the seat back 1 is adjusted, the locking knob 7 may be screwed to lock the position of the seat back 1, so that the position of the seat back is not adjusted any more when the seat back is used next time.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims (9)

1. An automatic back-following mechanism of seat, its characterized in that: comprises a seat backrest, a linkage mechanism and a pressure acting piece; the linkage mechanism is connected with the seat backrest; the linkage mechanism comprises a transverse swing arm, a vertical swing arm and a transverse slide bar, the lower end of the vertical swing arm is movably connected with the rear end of the transverse swing arm, the upper end of the vertical swing arm is movably connected with one end of the transverse slide bar, and the transverse slide bar is connected with the seat backrest; the pressure acting piece acts on the linkage mechanism through sliding pressing; the linkage mechanism drives the seat back to move through linkage under the action of the pressure acting piece.

2. The automatic seat back-following mechanism of claim 1, wherein: the pressure acting piece is connected with a cushion fixing plate for fixing the cushion.

3. The automatic seat back-following mechanism of claim 1, wherein: the front end of the swaying arm is movably connected with a transverse bracket.

4. A seat automatic back-following mechanism according to claim 3, wherein: the transverse support is also connected with a vertical support, and the upper end of the vertical support is in sliding fit with the transverse sliding rod.

5. The automatic seat back-following mechanism of claim 4, wherein: the sliding groove extending transversely along the transverse sliding rod is arranged on the transverse sliding rod, a sliding block is arranged at the upper end of the vertical support, and the sliding block is in sliding fit with the sliding groove.

6. A seat automatic back-following mechanism according to claim 3, wherein: and the transverse support is also provided with a limiting seat, the limiting seat is provided with a limiting groove, and the pressure acting piece can be arranged in the limiting groove in a relatively movable manner.

7. A seat automatic back-following mechanism according to claim 1 or 3, characterized in that: the locking device also comprises a locking knob which acts on the linkage mechanism to lock the linkage mechanism.

8. The automatic seat back-following mechanism of claim 1, wherein: the device also comprises a reset elastic piece which acts on the linkage mechanism.

9. A seat, characterized in that: having a seat automatic back-following mechanism as in any of claims 1 to 8.