Sofa bed backrest turnover device

Abstract

The utility model discloses a sofa bed backrest turnover device which comprises a bottom plate and a backup plate movably corresponding to the bottom plate, a through groove corresponding to the backup plate is formed in the bottom plate, an adjusting mechanism for adjusting the position of the backup plate relative to the bottom plate is arranged in the through groove, and the adjusting mechanism comprises a limiting frame, a push rod and a supporting frame. The limiting frame is arranged at the position, corresponding to the through groove, of the bottom of the bottom plate, the supporting frame is movably connected to the limiting frame, one end of the supporting frame extends out of the through groove to be correspondingly connected with the back of the backup plate, the other end of the supporting frame is located at the bottom of the bottom plate and connected with the output end of the push rod, and the push rod is connected to the bottom of the bottom plate; according to the sofa bed backrest turnover device, the backup plate is connected with the bottom plate through the adjusting mechanism, the angle of the backup plate relative to the bottom plate is changed through cooperation of the supporting frame and the push rod, and automatic angle changing and stable supporting of the backup plate are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sofa structure technical field, specifically a sofa bed backrest turnover device. BACKGROUND

[0002] The sofa bed is the furniture of two -purpose of sofa and bed, sofa bed must satisfy sitting and lying two functions, must be firm durable and beautiful, its material, craft should have the guarantee, realizes the product modeling also wants to satisfy its function makes it increase the comfortable feeling when adjusting sofa backrest, at present sofa backrest commonly used angle adjustment adopts the telescoping of electric push rod to complete backrest angle change action, through push rod angle changes constantly makes backrest angle velocity to have the mutation, the back -lifting process is unstable, and the transmission efficiency is low because of the push direction, and the component is easy to be damaged because of the excessive force during the back -lifting process. SUMMARY

[0003] Therefore, the utility model wants to solve the technical problem in providing a sofa bed backrest turnover device, through the adjusting mechanism connects the backrest plate and the bottom plate, and the supporting frame and the push rod cooperate to realize the angle change of the backrest plate relative to the bottom plate, realize the automatic angle change and stable support of the backrest plate.

[0004] In order to solve the above technical problem, the utility model provides the following technical scheme:

[0005] A sofa bed backrest turnover device, including bottom plate and corresponding backrest plate of the activity of the bottom plate, the bottom plate is equipped with the through slot corresponding with the backrest plate, the through slot is equipped with the adjusting mechanism of adjusting the position of the backrest plate relative to the bottom plate, the adjusting mechanism includes the limiting frame, push rod and supporting frame, the limiting frame is equipped with the bottom of the bottom plate, and the corresponding through slot is located, the supporting frame is movably connected on the limiting frame, and one end of the supporting frame is connected with the back of the backrest plate from the through slot, the other end of the supporting frame is located at the bottom of the bottom plate and is connected with the output end of the push rod, and the push rod is connected to the bottom of the bottom plate.

[0006] Further, the supporting frame is V-shaped structure with obtuse angle, the V-shaped connection of the supporting frame is hinged on the limiting frame, the limiting frame has a cavity for the movement of the supporting frame, and the limiting frame is fixedly arranged on the bottom of the bottom plate, and the length of the limiting frame is greater than the length of the through slot.

[0007] Further, one end of the supporting frame close to the backrest plate is hingedly connected with the back of the backrest plate, the other end of the supporting frame is hingedly connected with the output end of the push rod, and the end of the push rod away from the supporting frame is hingedly connected to the bottom of the bottom plate.

[0008] Further, the backrest and the bottom plate are further connected with a supporting mechanism, the supporting mechanism comprises a supporting rod and a connecting rod, one end of the supporting rod is connected with the backrest, the other end of the supporting rod is connected with the bottom plate, the connecting rod is provided with two and the two connecting rods are symmetrically distributed at two ends of the backrest and the bottom plate in the length direction, one end of the connecting rod is connected with the backrest, and the other end of the connecting rod is connected with the bottom plate.

[0009] Further, the supporting rod is provided with two and the two supporting rods are symmetrically connected to two sides of the backrest and the bottom plate in the width direction, the back of the backrest and the upper end surface of the backrest facing the backrest are respectively provided with recesses recessed inward, one end of the supporting rod is hingedly connected in the recess of the backrest and close to one connecting rod, and the other end of the supporting rod is hingedly connected in the recess of the bottom plate and close to the other connecting rod.

[0010] Further, the connecting rod comprises a connecting rod one, a connecting rod two and a supporting rod, one end of the connecting rod one is hingedly connected in the recess of the bottom plate, the other end of the connecting rod one is hingedly connected with one end of the connecting rod two, the end of the connecting rod two away from the connecting rod one is hingedly connected in the recess of the backrest, and the connecting ends of the connecting rod one and the connecting rod two are hingedly connected with the end of the supporting rod, and the two ends of the supporting rod are respectively hingedly connected with the connecting rod one and the connecting rod two.

[0011] The technical scheme of the utility model has the following beneficial technical effects:

[0012] 1. The sofa bed backrest turnover device of the utility model, the backrest and the bottom plate are connected through the adjusting mechanism, the angle change of the backrest relative to the bottom plate is realized through the cooperation of the supporting frame and the push rod, and the automatic angle change and stable support of the backrest are realized.

[0013] 2. The sofa bed backrest turnover device of the utility model, the angle and position of the supporting rod and the connecting rod at the corresponding position are changed under the action of the adjusting mechanism when the angle of the backrest relative to the bottom plate changes, turnover support and buffering of the backrest are formed, and the comfort of sofa backrest adjustment is improved. ACCURACY OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the sofa bed backrest turnover device of the utility model.

[0015] Figure 2 It is a structural schematic view of the sofa bed backrest turnover device of the utility model.

[0016] Figure 3 It is a structural schematic view of the sofa bed backrest turnover device of the utility model.

[0017] The reference numerals in the figure are as follows: 1. Base plate; 2. Backing plate; 3. Through groove; 4. Adjustment mechanism; 41. Limiting frame; 42. Support frame; 43. Push rod; 5. Support rod; 6. Connecting rod; 61. Connecting rod one; 62. Connecting rod two; 63. Support rod. Detailed Implementation Example 1

[0018] This embodiment describes a sofa bed backrest flipping device, such as... Figure 1 As shown, the device includes a base plate 1 and a backing plate 2 that moves relative to the base plate 1. The base plate 1 has a space to accommodate the backing plate 2 to be flipped or lowered. Both the upper surface of the base plate 1 and the back side of the backing plate 2 have inwardly recessed grooves. The grooves on the base plate 1 can accommodate the backing plate 2. The base plate 1 is provided with a through groove 3 corresponding to the backing plate 2. The through groove 3 passes through the base plate 1. An adjustment mechanism 4 is provided in the through groove 3 to adjust the position of the backing plate 2 relative to the base plate 1. One end of the adjustment mechanism 4 is connected to the back of the backing plate 2, and the other end is connected to the bottom surface of the base plate 1.

[0019] Specifically, in combination Figure 2 The adjustment mechanism 4 includes a limiting frame 41, a push rod 43, and a support frame 42. The limiting frame 41 is fixedly installed at the bottom of the base plate 1, corresponding to the through groove 3. Reinforcing ribs can be added between the inner walls of the limiting frame 41, and reinforcing ribs can also be added to the bottom of the base plate 1. The length of the limiting frame 41 is greater than the length of the through groove 3. The limiting frame 41 has a cavity for the support frame 42 to move. The cavity of the limiting frame 41 is connected to the through groove 3. The support frame 42 has a V-shaped structure with an obtuse angle. The V-shaped connection of the support frame 42 is hinged to the limiting frame 41. One end of the support frame 42 extends out of the through groove 3 and is hinged to the back of the back plate 2. The other end of the support frame 42 is hinged to the output end of the push rod 43. The end of the push rod 43 away from the support frame 42 is hinged to the bottom of the base plate 1.

[0020] The length of the V-shaped power arm of the support frame 42 allows the backrest 2 to be lowered to its lowest position and placed on the base plate 1. The angle change of the V-shaped power arm of the support frame 42 does not interfere with the parts on the base plate 1 and the backrest 2. The push rod 41 is hinged to the force-bearing end of the support frame 42. The support frame 42 rotates around its connection with the limit frame 41. The push rod 41 is pushed out or retracted, causing the support frame 42 to rotate around the pivot and its other end to be raised or lowered. The other end of the support frame 42 contacts the back of the backrest 2, causing it to be raised or lowered.

[0021] The back plate 2 is connected to the base plate 1 by the adjustment mechanism. The support frame 42 and the push rod 41 work together to realize the angle change of the back plate 2 relative to the base plate 1, so as to realize the automatic angle change and stable support of the back plate 2. Example 2

[0022] This embodiment describes a sofa bed backrest flipping device, such as...Figure 1 and Figure 2 As shown in the figure, it comprises a bottom plate 1 and a backrest 2 corresponding to the bottom plate 1, the bottom plate 1 is provided with a through slot 3 corresponding to the backrest 2, the through slot 3 is provided with an adjusting mechanism 4 for adjusting the position of the backrest 2 relative to the bottom plate 1, the adjusting mechanism 4 comprises a limiting frame 41, a push rod 43 and a supporting frame 42, the limiting frame 41 is arranged on the bottom plate 1 at the position corresponding to the through slot 3, the supporting frame 42 is movably connected to the limiting frame 41 and one end of the supporting frame 42 is connected to the backrest 2 corresponding to the back of the backrest 2, the other end of the supporting frame 42 is arranged on the bottom plate 1 and connected to the output end of the push rod 43, and the push rod 43 is connected to the bottom plate 1.

[0023] The backrest 2 and the bottom plate 1 are further connected to a supporting mechanism, specifically, as shown in the figure, the supporting mechanism comprises a supporting rod 5 and a connecting rod 6, and two groups of the supporting rod 5 and the connecting rod 6 are respectively arranged, the two groups of the supporting rod 5 are symmetrically arranged on both sides of the backrest 2 and the bottom plate 1 in the width direction, and the two groups of the connecting rod 6 are symmetrically arranged on both ends of the backrest 2 and the bottom plate 1 in the length direction. Figure 3

[0024] One end of the supporting rod 5 is hingedly connected to the groove of the backrest 2 and arranged close to one of the connecting rods 6, and the other end of the supporting rod 5 is hingedly connected to the groove of the bottom plate 1 and arranged close to the other connecting rod 6, that is, the supporting rod 5 is connected to the backrest 2 and the bottom plate 1 in an inclined manner.

[0025] The connecting rod 6 comprises a first connecting rod 61, a second connecting rod 62 and a supporting rod 63, both ends of the supporting rod 63 are respectively hingedly connected to the first connecting rod 61 and the second connecting rod 62, one end of the first connecting rod 61 is hingedly connected to the groove of the bottom plate 1, the other end of the first connecting rod 61 is hingedly connected to one end of the second connecting rod 62, the end of the second connecting rod 62 away from the first connecting rod 61 is hingedly connected to the groove of the backrest 2, and the connecting ends of the first connecting rod 61 and the second connecting rod 62 are hingedly connected to the end of the supporting rod 63, the hingedly connected end of the first connecting rod 61 and the supporting rod 63 has a self-locking structure, the hingedly connected end of the second connecting rod 62 and the supporting rod 63 has a self-locking structure, the connecting end of the first connecting rod 61 and the bottom plate 1 and the connecting end of the second connecting rod 62 and the backrest 2 all have self-locking structures, the first connecting rod 61 is lifted or lowered with the backrest 2 according to the angle change of the backrest 2, the supporting rod 63 and the second connecting rod 62 at the corresponding position are changed in angle and position according to the driving of the first connecting rod 61, and the supporting rod 5 and the connecting rod 6 form stable support for the backrest 2.

[0026] When the push rod 41 of the adjusting mechanism 4 drives the supporting frame 42 to move, the angle of the backrest 2 relative to the bottom plate 1 is changed, the position of the backrest 2 relative to the bottom plate 1 is changed, the movement of the backrest 2 drives the angle and position of the supporting rod 5 and the connecting rod 6 at the corresponding position to change, forming the overturning support and buffering for the backrest 2, and improving the comfort of the sofa backrest adjustment.

[0027] ​Obviously, the above embodiments are only examples for clearly illustrating the present application and are not intended to limit the present application. Based on the above description, one of ordinary skill in the art can make other different forms of changes or modifications. Here, it is not necessary or possible to enumerate all the embodiments. The obvious changes or modifications derived from the above should be covered in the protection scope of the present application.

Claims

1. A sofa bed backrest turnover device, characterized in that, The application relates to a backrest adjusting mechanism, which comprises a bottom plate (1) and a backrest (2) movably corresponding to the bottom plate (1), wherein the bottom plate (1) is provided with a through groove (3) corresponding to the backrest (2), the through groove (3) is provided with an adjusting mechanism (4) for adjusting the position of the backrest (2) relative to the bottom plate (1), the adjusting mechanism (4) comprises a limiting frame (41), a push rod (43) and a supporting frame (42), the limiting frame (41) is arranged at the bottom of the bottom plate (1) and corresponds to the through groove (3), the supporting frame (42) is movably connected to the limiting frame (41), one end of the supporting frame (42) extends out of the through groove (3) and is connected to the back of the backrest (2), the other end of the supporting frame (42) is arranged at the bottom of the bottom plate (1) and is connected to the output end of the push rod (43), and the push rod (43) is connected to the bottom of the bottom plate (1).

2. A sofa bed backrest turnover device according to claim 1, characterized in that The supporting frame (42) is in a V-shaped structure with an obtuse angle, the V-shaped connecting part of the supporting frame (42) is hingedly connected to the limiting frame (41), the limiting frame (41) has a cavity for the movement of the supporting frame (42), the limiting frame (41) is fixedly arranged at the bottom of the bottom plate (1), and the length of the limiting frame (41) is greater than the length of the through groove (3).

3. A sofa bed backrest turnover device according to claim 1, characterized in that One end of the supporting frame (42) close to the backrest (2) is hingedly connected to the back of the backrest (2), the other end of the supporting frame (42) is hingedly connected to the output end of the push rod (43), and the other end of the push rod (43) away from the supporting frame (42) is hingedly connected to the bottom of the bottom plate (1).

4. The sofa bed backrest turnover device according to claim 1, characterized in that, The backrest (2) and the bottom plate (1) are further connected to a supporting mechanism, the supporting mechanism comprises a supporting rod (5) and a connecting rod (6), one end of the supporting rod (5) is connected to the backrest (2), the other end of the supporting rod (5) is connected to the bottom plate (1), the connecting rod (6) is arranged at two ends of the length direction of the backrest (2) and the bottom plate (1) and is symmetrically distributed, one end of the connecting rod (6) is connected to the backrest (2), and the other end of the connecting rod (6) is connected to the bottom plate (1).

5. A sofa bed backrest turnover device according to claim 4, characterized in that The supporting rod (5) is arranged at two ends of the width direction of the backrest (2) and the bottom plate (1) and is symmetrically connected, the back of the backrest (2) and the upper end surface of the bottom plate (1) facing the backrest (2) are respectively provided with recesses formed by being inwardly recessed, one end of the supporting rod (5) is hingedly connected to the recess of the backrest (2) and is arranged close to one connecting rod (6), and the other end of the supporting rod (5) is hingedly connected to the recess of the bottom plate (1) and is arranged close to the other connecting rod (6).

6. A sofa bed backrest turnover device according to claim 5, characterized in that The connecting rod (6) comprises a first connecting rod (61), a second connecting rod (62) and a supporting rod (63), one end of the first connecting rod (61) is hingedly connected to the recess of the bottom plate (1), the other end of the first connecting rod (61) is hingedly connected to one end of the second connecting rod (62), the end of the second connecting rod (62) away from the first connecting rod (61) is hingedly connected to the recess of the backrest (2), the connecting ends of the first connecting rod (61) and the second connecting rod (62) are hingedly connected to the end of the supporting rod (63), and the two ends of the supporting rod (63) are respectively hingedly connected to the first connecting rod (61) and the second connecting rod (62).

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