TWM620294U - Forward and backward adjustment device for sofa backrest - Google Patents

Abstract

A front and rear adjusting device for the backrest of a sofa mainly has two cranks arranged in front and rear with a distance between them. The top ends of the two cranks are respectively fixedly connected to an upper front pivot and an upper rear pivot. , The upper and rear pivots are respectively pivotally connected to an upper frame plate, and the upper frame plate is fixedly connected to the frame of the backrest; the bottom ends of the two cranks are respectively fixedly connected to a lower front pivot and a lower rear pivot. The lower front pivot, The lower rear pivots are respectively pivotally connected with the lower frame board, and the lower frame board is fixedly connected with the frame of the sofa seat. Through the above arrangement, the backrest can be adjusted back and forth by hand movement, and the adjusted two cranks have a length of abutment to be positioned, thereby achieving the effect of adjusting the front and back position of the backrest, and has a simple structure and practical effect.

Description

Backrest adjustment device for sofa

This creation is about a front and rear adjustment device for the backrest of a sofa, especially the front and rear adjustment device of the sofa that can achieve the effect of adjusting the backrest position with a simple structure.

According to the conventional sofas where the backrest position is fixed and cannot be adjusted, the backrest cannot be adjusted according to the individual's height and leg length, and it may be uncomfortable to sit up. Afterwards, some manufacturers discovered the above problems and manufactured sofas with adjustable backrests so that the backrests can be adjusted according to personal preference or individual height and leg length. For example, Taiwan Patent Certificate No. M550586, M503821, M501178 and other cases are all. However, in order to achieve the function of adjusting the position of the backrest back and forth, the above-mentioned patents adopt a structure that uses a motor-driven screw to drive the backrest to move and adjust the position (such as M550586); On the upper part of the two ends of the seat body and pass through the outer sleeve, the outer sleeve is driven to make a reciprocating horizontal linear movement along the inner sleeve, so that the back of the sofa can be moved forwards and backwards to adjust the positioning (such as M503821); some have guide rails The support group is slidably arranged in the guide rail group, and the limit group is pivotally connected to the guide rail group and the support group. With the composition of the above components, the guide rail group is accommodated on the sofa cushion, and the support group is accommodated on the back of the sofa chair, so that the support group moves forward and backward along the axis of the guide rail group, and the limit group is triggered to restrain The position of the support group relative to the guide rail group can be adjusted to adjust the position of the sofa back relative to the sofa cushion (such as M501178).

Although the aforementioned patent case can achieve the effect of adjusting the front and rear positions of the backrest, the structure is complicated, the manufacturing cost is high, and the operation is inconvenient, which needs to be improved.

In view of the above-mentioned shortcomings in the application of the conventional knowledge structure, the author improved it, and this creation came into being.

The main purpose of this creation is to provide a front and rear adjustment device for the backrest of a sofa with a simple structure and convenient operation.

The main feature of this creation lies in the fact that there are two cranks arranged one behind the other with a distance between them. The top ends of the two cranks are respectively fixed to an upper front pivot and an upper rear pivot. The upper front pivot , The upper and rear pivots are respectively pivotally connected to an upper frame plate, and the upper frame plate is fixedly connected to the frame of the backrest; the bottom ends of the two cranks are respectively fixedly connected to a lower front pivot and a lower rear pivot. The lower front pivot, The lower rear pivots are respectively pivotally connected with the lower frame board, and the lower frame board is fixedly connected with the frame of the sofa seat. Through the above arrangement, the backrest can be adjusted back and forth by hand movement, and the adjusted two cranks have a length of abutment to be positioned, thereby achieving the effect of adjusting the front and back position of the backrest, and has a simple structure and practical effect.

Please refer to Figures 1 to 5, the backrest front and rear adjusting device 1 of this creative embodiment is applied to the sofa 2, and at each backrest 3 position, it is provided with:

There are two cranks 10 and 11 (as shown in Figures 4 and 5). The two cranks 10 and 11 are arranged back and forth and bend in the same direction, and there is a distance L between them. The top ends of the two cranks 10 and 11 are fixed to an upper front pivot 12 and an upper rear pivot 13 respectively; the bottom ends of the two cranks 10 and 11 are respectively fixed to a lower front pivot 14 and a lower rear pivot 15.

An upper frame plate 16 (as shown in Figures 4 and 5) is secured at the upper front pivot 12 and the upper rear pivot 13, the upper front pivot 12 and the upper rear pivot 13 are respectively pivotally connected to the upper frame plate 16, and Set back and forth. The upper shelf 16 is fixedly connected to the frame 30 inside the backrest 3.

The lower frame plate 17 (as shown in Figures 4 and 5) is secured at the lower front pivot 14 and the lower rear pivot 15. The lower front pivot 14 and the lower rear pivot 15 are respectively pivotally connected to the lower frame plate 17, and Set back and forth. The lower shelf plate 17 is fixedly connected to the frame 40 inside the seating surface 4 of the sofa 2.

On the back side of the seat surface 4 of the sofa 2, at the position corresponding to the displacement path of the two cranks 10 and 11, there is a slit 41 (as shown in Figure 3), so that the two cranks 10 and 11 can follow the slit 41 when the two cranks 10 and 11 move forward and backward. Smooth displacement.

When the above-mentioned components are combined in sequence, and each backrest 3 is equipped with the backrest front and rear adjusting device 1 of this creative embodiment. In application, as shown in Figures 4 and 5, as long as the backrest 3 whose position is to be adjusted by hand is moved forward or backward, the two cranks 10 and 11 will be the fulcrums of the lower front pivot 14 and lower rear pivot 15 As the backrest 3 moves in the slit 41, until the top section (position A in Figure 4) or the bottom section (position B in Figure 5) of the two cranks 10 and 11 abut each other back and forth to be positioned. The backrest 3 can be adjusted back and forth.

From the above description, it can be known that this creation has the following advantages and effects in application:

1. The 3 positions of the backrest can be adjusted back and forth, which is practical.

2. The structure is simple, which can reduce manufacturing costs and enhance market competitiveness.

In summary, this creation is not only novel but also practical, and a new patent application is filed in accordance with the law. I implore you to review and approve the patent.

1: Backrest front and rear adjustment device 10, 11: crank 12: Up front pivot 13: upper and rear pivot 14: Lower front pivot 15: Lower rear pivot 16: Shelf board 17: Lower shelf board 2: sofa 3: backrest 30: Skeleton 4: sitting noodles 40: skeleton 41: Cut Seam A, B: location L: Spacing

Figure 1 shows a three-dimensional view of the sofa in this creative embodiment. Figure 2 shows a side view of the sofa in this creative embodiment. Figure 3 shows a top view of the sofa in this creative embodiment. Fig. 4 shows a side view of the forward and backward displacement adjustment of the backrest adjustment device of the present creative embodiment. Fig. 5 is a side view of the backrest adjustment device for adjusting the backrest displacement of the present creative embodiment.

1: Backrest front and rear adjustment device

10, 11: crank

12: Up front pivot

13: upper and rear pivot

14: Lower front pivot

15: Lower rear pivot

16: Shelf board

17: Lower shelf board

3: backrest

30: Skeleton

4: sitting noodles

40: skeleton

41: Cut Seam

A: Location

L: Spacing

Claims (2)

A front and rear adjustment device for the backrest of a sofa, which is attached to each backrest position, and is provided with: Two cranks, two cranks are arranged front and rear, bent in the same direction, and there is a gap between the two; the top ends of the cranks are respectively fixedly connected with an upper front pivot and an upper rear pivot; the bottom ends of the two cranks are respectively fixed Connect the front pivot and the rear pivot; An upper frame board is located at the upper front pivot and the upper rear pivot position. The upper front pivot and the upper rear pivot are respectively pivotally connected to the upper frame plate and arranged in a front and rear arrangement. The upper frame plate and the upper frame A frame inside the backrest is fixed; The lower frame plate is fixed at the position of the lower front pivot and the lower rear pivot. The lower front pivot and the lower rear pivot are respectively pivotally connected to the lower frame plate and arranged in a front and rear arrangement. The lower frame plate Fixedly connected with a frame inside the sofa seat; and The slit is arranged on the back side of the sitting surface, corresponding to the displacement path of the two cranks, so that the two cranks can move forward and backward according to the slit when they move forward and backward. The backrest front and rear adjustment device of the sofa according to claim 1, wherein the top section or bottom section of the two cranks abut against each other after the front and rear displacements, so that the backrest is positioned after displacement.

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