Backrest follow-up mechanism

Abstract

The utility model belongs to the field of sofa seats, and particularly relates to a backrest follow-up mechanism, which is characterized in that the structure of a first connecting plate is improved, the length of the first connecting plate in the horizontal direction is increased through an inclined plate and a quasi-horizontal plate, and the first connecting plate is connected with a third middle plate and a second connecting plate behind the first connecting plate; the two connecting points of the backrest connecting plate are connected with the first connecting plate through the corresponding middle plates, so that in the seat opening process, the first connecting plate firstly drives the third middle plate and the second connecting plate to move, the backrest moves forwards by a large distance, and enough space is provided for follow-up lying of the backrest; the chair can be placed without leaning against the wall, and the space occupied by the sofa is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of sofa seat, especially relates to a backrest follow-up mechanism. BACKGROUND

[0002] With the progress of the times and the development of science and technology, the productivity level of our country is continuously improved, and more and more functional seats appear in people's production and life, and the functional seat can realize the adjustment of sitting posture, lying posture and zero gravity state, so that people sit and lie more comfortably. However, in the process of converting the existing seat from the sitting posture state to the zero gravity state, the chair back assembly of the seat is easy to interfere with the wall, in order to avoid the interference of the wall with the posture conversion of the seat, the seat in the sitting posture state cannot be placed without gap with the wall surface, resulting in that the seat occupies a large space. SUMMARY

[0003] In view of the defects of the prior art, the backrest follow-up mechanism is improved, the distance of the backrest plate moving forward is increased in the opening process of the seat, so as to provide enough space for the subsequent inclination of the backrest plate, avoid the interference of the backrest with the wall, and facilitate the wall placement of the sofa.

[0004] The technical scheme of the utility model is as follows:

[0005] The backrest follow-up mechanism comprises a first connecting plate, a second connecting plate and a backrest connecting plate,

[0006] The first connecting plate comprises a fixed plate fixedly connected with a seat frame, an inclined plate is arranged at the upper end of the fixed plate, a horizontal plate is arranged at the upper end of the inclined plate, a first connecting hole is arranged on the inclined plate close to the fixed plate, a second connecting hole is arranged on the inclined plate close to the horizontal plate, and a third connecting hole is arranged on the horizontal plate away from the inclined plate,

[0007] The backrest connecting plate comprises a backrest plate, a connecting plate is arranged at the lower end of the backrest plate, a fourth connecting hole is arranged at the lower part of the connecting plate, a fifth connecting hole is arranged at the upper part of the connecting plate, a plurality of chair back connecting holes are arranged on the backrest plate, and the included angle between the connecting line of the fourth connecting hole and the fifth connecting block and the connecting line of the plurality of chair back connecting holes is obtuse;

[0008] The lower end of the second connecting plate is rotationally connected to the bottom frame, and the upper end of the second connecting plate is provided with a sixth connecting hole,

[0009] Further comprising a first intermediate plate, the lower end of the first intermediate plate is rotationally connected in the first connecting hole, and the upper end of the first intermediate plate is rotationally connected in the fourth connecting hole,

[0010] Further comprising a second intermediate plate, the second intermediate plate comprises a middle straight plate and a middle bent plate, the middle bent plate is connected to the lower end of the middle straight plate, a middle connecting hole is arranged on the middle straight plate close to the middle bent plate, an upper connecting hole is arranged on the upper part of the middle straight plate, and a lower connecting hole is arranged on the lower part of the middle bent plate, the middle connecting hole of the second intermediate plate is rotationally connected with the second connecting hole, the upper connecting hole of the second intermediate plate is rotationally connected with the fifth connecting hole,

[0011] Further comprising a third intermediate plate, the third intermediate plate comprises a third one intermediate plate and a third two intermediate plate arranged at an angle, the lower end of the third one intermediate plate is rotationally connected with the sixth connecting hole on the second connecting plate, a limiting hole is arranged on the third two intermediate plate close to the side of the third one intermediate plate, a middle hole is arranged on the middle part of the third two intermediate plate, the middle hole is rotationally connected with the third connecting hole of the first connecting plate, and an upper hole is arranged on the upper end of the third two intermediate plate,

[0012] Further comprising a fourth intermediate plate, one end of the fourth intermediate plate is rotationally connected with the upper hole of the third two intermediate plate, and the other end of the fourth intermediate plate is rotationally connected with the fifth connecting hole of the backrest connecting plate,

[0013] and a fifth intermediate plate, one end of the fifth intermediate plate is rotationally connected with the lower connecting hole of the second intermediate plate, the other end of the fifth intermediate plate is provided with a waist-shaped hole, the limiting hole is connected with a limiting shaft, and the waist-shaped hole of the fifth intermediate plate is matched on the limiting shaft to slide.

[0014] Further, the back surface of the first intermediate plate is provided with a first limiting sleeve, the upper end surface of the inclined plate is provided with a first limiting groove, when the seat is opened, the first limiting sleeve abuts against the front end of the first limiting groove, and when the seat is folded, the first limiting sleeve abuts against the rear end of the first limiting groove.

[0015] Further, the front surface of the first intermediate plate is provided with a second limiting sleeve, the lower end of the backrest connecting plate is provided with a first protruding edge in extension, the first protruding edge and the backrest connecting plate form a first positioning groove, a second positioning groove symmetrical to the first positioning groove is arranged on the backrest connecting plate with the fourth connecting hole as a center line, when the seat is opened, the second limiting sleeve abuts against the second positioning groove, and when the seat is folded, the second limiting sleeve abuts against the first positioning groove.

[0016] Further, the front surface of the first connecting plate is provided with a third positioning sleeve and a fourth positioning sleeve on the two sides of the second connecting hole respectively, when the seat is opened, the second intermediate plate abuts against the third positioning sleeve, and when the seat is folded, the second intermediate plate abuts against the fourth positioning sleeve.

[0017] In summary, the utility model has the following beneficial effects:

[0018] The utility model discloses a change the structure of first connecting plate, and the connecting rod structure between backrest connecting plate and first connecting plate and second connecting plate, realized the forward movement of large stroke in the process of seat opening, provided more space for the unfolding of subsequent backrest, realized the zero wall -hugging placement of seat, reduced the space of sofa occupied. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structural schematic diagram of the utility model under the condition of seat not being opened.

[0020] Figure 2 It is the structural schematic diagram of the utility model under the condition of seat not being opened. Figure 1

[0021] Figure 3 It is the structural schematic diagram of the utility model under the condition of seat not being opened.

[0022] Figure 4 It is the structural schematic diagram of the utility model under the condition of seat not being opened. Figure 2

[0023] It is the structural schematic diagram of the utility model under the condition of seat not being opened. Figure 5

[0024] It is the structural schematic diagram of the utility model under the condition of seat not being opened. Figure 6 Figure 3 It is the structural schematic diagram of the utility model under the condition of seat not being opened.

[0025] Figure 7 It is the structural schematic diagram of the utility model under the condition of seat not being opened.

[0026] Figure 8 It is the structural schematic diagram of the utility model under the condition of seat not being opened.

[0027] Figure 9 It is the structural schematic diagram of the utility model under the condition of seat not being opened.

[0028] 1 is first connecting plate, 10 is fixed plate, 11 is inclined plate, 12 is horizontal plate, 110 is first connecting hole, 111 is second connecting hole, 120 is third connecting hole, 112 is first limiting slot,

[0029] 2 is second connecting plate, 20 is sixth connecting hole,

[0030] 3 is backrest connecting plate, 30 is backrest plate, 31 is connecting plate, 310 is fourth connecting hole, 311 is fifth connecting hole, 32 is first convex edge, 320 is first positioning recess, 321 is second positioning recess,

[0031] 4 is first intermediate plate, 40 is first limiting sleeve, 41 is second limiting sleeve,

[0032] ​​5 is a second intermediate plate, 50 is an intermediate straight plate, 51 is an intermediate curved plate, 500 is a middle connecting hole, 501 is an upper connecting hole, 502 is a lower connecting hole,

[0033] 6 is a third intermediate plate, 60 is a first third intermediate plate, 61 is a second third intermediate plate, 610 is a limiting hole, 611 is a middle hole, 612 is an upper hole,

[0034] 7 is a fourth intermediate plate,

[0035] 8 is a fifth intermediate plate, 80 is a waist-shaped hole,

[0036] 13 is a third positioning sleeve, 14 is a fourth positioning sleeve;

[0037] 1000 is a seat frame, 2000 is a bottom frame. DETAILED DESCRIPTION

[0038] The present application will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and can be implemented, but the embodiments are not as a limitation of the present application.

[0039] It should be noted that when the element is referred to as "set in", "fixed in" another element, it can be directly on another element or there can be a middle element. When the element is referred to as "fixed to" another element, or "fixedly connected" to another element, they can be detachably fixed or non-detachably fixed. When an element is considered to be "connected" or "rotatably connected" to another element, it can be directly connected to another element or a middle element can exist. The terms "vertical", "horizontal", "left", "right", "up", "down" and similar expressions are only for the purpose of illustration and do not represent the only implementation.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing the specific embodiments and are not intended to be binding on the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0041] In the present application, "first", "second", "third" and the like are similar and do not represent a specific number and order, but only for the purpose of distinguishing names.

[0042] Referring to Figures 1 to 4 As shown, the backrest following mechanism comprises a first connecting plate 1, a second connecting plate 2, a backrest connecting plate 3,

[0043] The first connecting plate 1 comprises a fixed plate 10 fixedly connected with the seat frame 1000, the upper end of the fixed plate 10 is provided with an inclined plate 11, the upper end of the inclined plate 11 is provided with a horizontal plate 12, the inclined plate 11 close to the fixed plate is provided with a first connecting hole 110, the inclined plate 11 close to the horizontal plate is provided with a second connecting hole 111, and the horizontal plate 12 far from the inclined plate is provided with a third connecting hole 120, the structure of the first connecting plate is improved, the length of the first connecting plate in the horizontal direction is prolonged through the inclined plate and the horizontal plate, the third intermediate plate and the second connecting plate are connected, the two connecting points of the backrest connecting plate are connected with the first connecting plate through the corresponding intermediate plates, therefore, in the opening process of the seat, the first connecting plate drives the third intermediate plate and the second connecting plate to move first, so that the backrest moves forward by a large distance, and enough space is provided for the subsequent lying down of the backrest.

[0044] Referring to Figure 7 As shown in the drawings, the backrest connecting plate 3 comprises a backrest plate 30, the lower end of the backrest plate 30 is provided with a connecting plate 31, the lower part of the connecting plate 31 is provided with a fourth connecting hole 310, the upper part of the connecting plate 31 is provided with a fifth connecting hole 311, a plurality of backrest connecting holes 300 are arranged on the backrest plate 30, and the included angle between the connecting line of the fourth connecting hole and the fifth connecting block and the connecting line of the plurality of backrest connecting holes is an obtuse angle, the structure of the backrest connecting plate is limited, and the width of the backrest plate of the utility model is small, so that the large-angle overturning of the backrest is possible.

[0045] The lower end of the second connecting plate 2 is rotationally connected to the bottom frame 2000, the upper end of the second connecting plate 2 is provided with a sixth connecting hole 20, and the bottom frame is provided with a limiting rod, when the seat is opened to the most front end, the second connecting plate abuts against the limiting rod of the bottom frame, the position of the forward swing of the second connecting plate is limited, the second connecting plate can be supported, and the bearing capacity and stability of the whole seat after the seat is opened are ensured.

[0046] Further comprising a first intermediate plate 4, the lower end of the first intermediate plate 4 is rotationally connected in the first connecting hole 110, the upper end of the first intermediate plate 4 is rotationally connected in the fourth connecting hole 310,

[0047] Further comprising a second intermediate plate 5, the second intermediate plate 5 comprises an intermediate straight plate 50 and an intermediate bent plate 51, the intermediate bent plate 51 is connected to the lower end of the intermediate straight plate 50, a middle connecting hole 500 is arranged on the intermediate straight plate 50 close to the intermediate bent plate, an upper connecting hole 501 is arranged on the upper part of the intermediate straight plate, and a lower connecting hole 502 is arranged on the lower part of the intermediate bent plate, the middle connecting hole 500 of the second intermediate plate 5 is rotationally connected with the second connecting hole 111, the upper connecting hole 501 of the second intermediate plate 5 is rotationally connected with the fifth connecting hole 311,

[0048] Further comprising a third intermediate plate 6, the third intermediate plate 6 comprises a third one intermediate plate 60 and a third two intermediate plate 61 arranged at an angle, the lower end of the third one intermediate plate 60 is rotationally connected with the sixth connecting hole 20 on the second connecting plate 2, the third two intermediate plate 61 is provided with a limiting hole 610 near the side of the first three one intermediate plate, the middle part of the third two intermediate plate 61 is provided with a middle hole 611, the middle hole is rotationally connected with the third connecting hole 120 of the first connecting plate 1, the upper end of the third two intermediate plate 61 is provided with an upper hole 612,

[0049] Further comprising a fourth intermediate plate 7, one end of the fourth intermediate plate 7 is rotationally connected with the upper hole 612 of the third two intermediate plate 61, the other end of the fourth intermediate plate 7 is rotationally connected with the fifth connecting hole 311 of the backrest connecting plate 3,

[0050] And a fifth intermediate plate 8, one end of the fifth intermediate plate 8 is rotationally connected with the lower connecting hole 502 of the second intermediate plate 5, the other end of the fifth intermediate plate 8 is provided with a waist-shaped hole 80, the limiting hole is connected with a limiting shaft, and the waist-shaped hole of the fifth intermediate plate 8 is matched on the limiting shaft and slides.

[0051] The utility model discloses a backrest follow-up mechanism, since the main connecting nodes of the first intermediate plate and the second intermediate plate are all located on the first connecting plate, when the seat frame starts moving, the first connecting plate moves along with the seat frame, at this time, the position of the backrest relative to the seat frame is basically fixed, the second connecting plate and the third intermediate plate mainly move, when the second connecting plate moves to the position, the third intermediate plate rotates around the connecting place thereof with the first connecting plate, which drives the first intermediate plate, the second intermediate plate, the fourth intermediate plate and the fifth intermediate plate to move, mainly showing that the backrest reverses to the back, the opening angle is big, and interference with the wall body does not occur, the utility model discloses the structural design of the first connecting plate and the connecting relationship with the second connecting plate and the third intermediate plate, also drive the backrest to move forward in the seat frame forward movement process, provide the larger space for the backrest reversal to the back, avoid the problem that the backrest interferes with the wall body, so that the sofa can be placed against the wall, and the space occupied by the sofa is reduced.

[0052] Further, the back surface of the first intermediate plate 4 is provided with a first limiting sleeve 40, and the upper end surface of the inclined plate 11 is provided with a first limiting groove 112, when the seat is opened, the first limiting sleeve 40 abuts against the front end of the first limiting groove, when the seat is folded, the first limiting sleeve abuts against the rear end of the first limiting groove, the rotation angle of the first intermediate plate relative to the first connecting plate is limited by the first limiting sleeve, better support can be provided, and the stability of the backrest in the opened or folded state of the seat is ensured.

[0053] Further, the front surface of the first intermediate plate 4 is provided with a second limiting sleeve 41, the lower end of the backrest connecting plate 3 is provided with a first protruding edge 32, the first protruding edge and the backrest connecting plate form a first positioning groove 320, a second positioning groove 321 symmetrical to the first positioning groove is arranged on the backrest connecting plate with the fourth connecting hole as the middle line, when the seat is opened, the second limiting sleeve abuts against the second positioning groove, and when the seat is folded, the second limiting sleeve abuts against the first positioning groove.

[0054] Further, the front surface of the first connecting plate 1 is provided with a third positioning sleeve 13 and a fourth positioning sleeve 14 on both sides of the second connecting hole, when the seat is opened, the second intermediate plate abuts against the third positioning sleeve, and when the seat is folded, the second intermediate plate abuts against the fourth positioning sleeve.

[0055] In conclusion, the utility model has the following beneficial effects:

[0056] The utility model discloses a seat structure, which comprises a first connecting plate 1, a second connecting plate 2 and a backrest connecting plate 3, wherein the first connecting plate is provided with a first connecting hole 11 and a second connecting hole 12, the second connecting plate is provided with a third connecting hole 21 and a fourth connecting hole 22, the backrest connecting plate is provided with a fifth connecting hole 31 and a sixth connecting hole 32, the first connecting plate is provided with a first limiting sleeve 12, the second connecting plate is provided with a second limiting sleeve 22, and the backrest connecting plate is provided with a third limiting sleeve 31.

[0057] Based on the described embodiments of the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the application.

Claims

1. A backrest follow-up mechanism, characterized in that: it comprises a first connecting plate, a second connecting plate, and a backrest connecting plate, the first connecting plate comprises a fixed plate fixedly connected with a seat frame, an inclined plate provided at an upper end of the fixed plate, a horizontal plate provided at an upper end of the inclined plate, a first connecting hole provided on the inclined plate close to the fixed plate, a second connecting hole provided on the inclined plate close to the horizontal plate, and a third connecting hole provided on the horizontal plate away from the inclined plate, the backrest connecting plate comprises a backrest plate, a connecting plate provided at a lower end of the backrest plate, a fourth connecting hole provided at a lower part of the connecting plate, a fifth connecting hole provided at an upper part of the connecting plate, and a plurality of backrest connecting holes provided on the backrest plate, and an angle between a line connecting the fourth connecting hole and the fifth connecting hole and a line connecting the plurality of backrest connecting holes is obtuse, a lower end of the second connecting plate is rotationally connected with a bottom frame, and an upper end of the second connecting plate is provided with a sixth connecting hole, it further comprises a first intermediate plate, a lower end of the first intermediate plate is rotationally connected in the first connecting hole, and an upper end of the first intermediate plate is rotationally connected in the fourth connecting hole, it further comprises a second intermediate plate, the second intermediate plate comprises a straight intermediate plate and a bent intermediate plate, the bent intermediate plate is connected at a lower end of the straight intermediate plate, a middle connecting hole is provided on the straight intermediate plate close to the bent intermediate plate, an upper connecting hole is provided at an upper part of the straight intermediate plate, and a lower connecting hole is provided at a lower part of the bent intermediate plate, the middle connecting hole of the second intermediate plate is rotationally connected with the second connecting hole, and the upper connecting hole of the second intermediate plate is rotationally connected with the fifth connecting hole, it further comprises a third intermediate plate, the third intermediate plate comprises a third one intermediate plate and a third two intermediate plate arranged at an angle, a lower end of the third one intermediate plate is rotationally connected with the sixth connecting hole on the second connecting plate, a limiting hole is provided on a side of the third two intermediate plate close to the third one intermediate plate, a middle hole is provided at a middle part of the third two intermediate plate, the middle hole is rotationally connected with the third connecting hole of the first connecting plate, and an upper hole is provided at an upper end of the third two intermediate plate, it further comprises a fourth intermediate plate, one end of the fourth intermediate plate is rotationally connected with the upper hole of the third two intermediate plate, and the other end of the fourth intermediate plate is rotationally connected with the fifth connecting hole of the backrest connecting plate, a fifth intermediate plate, one end of the fifth intermediate plate is rotationally connected with the lower connecting hole of the second intermediate plate, the other end of the fifth intermediate plate is provided with a waist-shaped hole, the limiting hole is connected with a limiting shaft, and the waist-shaped hole of the fifth intermediate plate is slidably fitted on the limiting shaft.

2. The backrest follow-up mechanism of claim 1, wherein: a first limiting sleeve is provided on a back surface of the first intermediate plate, a first limiting groove is provided on an upper end surface of the inclined plate, the first limiting sleeve abuts against a front end of the first limiting groove when the seat is opened, and the first limiting sleeve abuts against a rear end of the first limiting groove when the seat is folded.

3. The backrest follow-up mechanism of claim 1, wherein: a second limiting sleeve is provided on a front surface of the first intermediate plate, a first protruding edge is provided on the lower end of the backrest connecting plate, the first protruding edge and the backrest connecting plate form a first positioning groove, a second positioning groove symmetrical to the first positioning groove is provided on the backrest connecting plate with the fourth connecting hole as a middle line, the second limiting sleeve abuts in the second positioning groove when the seat is opened, and the second limiting sleeve abuts in the first positioning groove when the seat is folded.

4. The backrest follow-up mechanism of claim 1, wherein: The front surface of the first connecting plate is respectively provided with a third positioning sleeve and a fourth positioning sleeve on both sides of the second connecting hole, the second intermediate plate abuts against the third positioning sleeve when the seat is opened, and the second intermediate plate abuts against the fourth positioning sleeve when the seat is stowed.

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