Mechanical lifting backrest support

Abstract

A mechanical lifting backrest support comprises a base, a sliding rail, a movable transverse rod, a lifting support, an unlocking device and a lifting device. A fixed cross beam is arranged between the bases, a movable cross rod is arranged at the top ends of the bases, one end of the lifting device is connected with the middle of the fixed cross beam, and the other end of the lifting device is connected with the middle of the movable cross rod. The two ends of the movable transverse rod are fixedly connected with the lifting support. The unlocking device is matched with the lifting support, in the unlocking state, the lifting device drives the movable transverse rod to ascend and descend along the sliding rail, and in the locking state, the lifting device cannot drive the movable transverse rod to ascend and descend. The mechanical lifting backrest is simple in structure, does not need to be externally connected with a starting device or remote control equipment, and has the advantages of low cost, convenience in operation and the like.

Description

Technical Field

[0001] The utility model relates to the field of functional furniture, in particular to a mechanical lifting backrest bracket. Background Art

[0002] As people's lives progress, their demands for enjoying life have increased, so various furniture devices that can be transformed into different shapes have emerged, such as sofas with adjustable backrests. Existing functional sofas generally achieve backrest lifting through electric drive or controllable gas springs combined with wired control handles.

[0003] The prior patent application, patent number 202321336855.2, primarily relies on a gas spring switch or remote control (motor-driven) to achieve the mechanism's lifting function. However, this technology's drawback is that the backrest bracket requires an external activation device or remote control. This structure requires an external activation device, otherwise the sofa backrest cannot be raised or lowered. This leads to high production costs, complex operation, and inconvenience for the elderly and children. Furthermore, the external device is prone to damage after prolonged use, and product quality cannot be guaranteed. Summary of the Invention

[0004] In order to solve the above problems, the utility model provides a mechanical lifting backrest bracket.

[0005] The technical solution of the utility model is: a mechanical lifting backrest bracket, a base, a slide rail, a movable cross bar, a lifting bracket, an unlocking device, and a lifting device; a fixed cross beam is provided between the bases, the movable cross bar is provided at the top of the base, one end of the lifting device is connected to the middle part of the fixed cross beam, and the other end is connected to the middle part of the movable cross bar; both ends of the movable cross bar are fixedly connected to the lifting bracket; the unlocking device cooperates with the lifting bracket, and in the unlocked state, the lifting device drives the movable cross bar to move up and down along the slide rail, and in the locked state, the lifting device cannot drive the movable cross bar to move up and down.

[0006] Preferably, the upper end of the lifting bracket is fixedly connected to the left and right ends of the movable cross bar, and the slide rail is fixed between the base and the lifting bracket. The lifting bracket can slide up and down along the slide rail.

[0007] Preferably, a locking notch is provided at the lower portion of the lifting bracket, and the unlocking device includes an unlocking cross bar, an unlocking rocker, a lock buckle and a tension spring, the two ends of the unlocking cross bar are respectively fixedly connected to the upper end of the unlocking rocker, the lower end of the unlocking rocker is fixedly connected to the lock buckle, and is hinged to the base through a rotating shaft, and when the unlocking rocker is rotated, the lock buckle is driven to rotate at the same time; a raised locking column is provided on the lock buckle, one end of the tension spring is fixed to the base, and the other end is connected to the locking column, when the locking column is located in the locking notch, the lifting and lowering movement of the lifting bracket is restricted; when the locking column is out of the locking notch, the lifting bracket can be raised and lowered.

[0008] As a further preferred embodiment, a slope is provided on the lower portion of the lifting bracket, facing the lock buckle.

[0009] As a further preferred embodiment, a latch or a retaining spring is provided on the rotating shaft, and a wear-resistant gasket is provided between the latch or the retaining spring and the base.

[0010] Preferably, a connecting frame base is provided in the middle of the fixed crossbeam and the movable crossbar, and both ends of the lifting device are hinged to the two connecting frame bases respectively.

[0011] Preferably, a sofa backrest mounting seat is provided on the movable cross bar or the lifting bracket, and the sofa backrest mounting seat is used for being installed and connected to the sofa backrest.

[0012] Preferably, the lifting device is a free-style gas spring.

[0013] Preferably, the unlocking device includes a sensing device and a lifting device.

[0014] The beneficial effects of the present invention are as follows: the mechanical lifting backrest of the present invention has a simple structure, adopts a built-in unlocking device to realize the required function, does not require an external starting device or remote control equipment, has the advantages of low cost and convenient operation, reflects the uniqueness of the product and enhances the user experience and visual sense. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the utility model viewed from the front.

[0016] Figure 2 This is a schematic structural diagram of the utility model as viewed from the rear and bottom.

[0017] Figure 3 It is the main view of the utility model.

[0018] Figure 4 It is a left view of the utility model.

[0019] Figure 5 This is one of the structural diagrams of the utility model after the lifting bracket is hidden.

[0020] Figure 6 This is the second structural diagram of the utility model after the lifting bracket is hidden.

[0021] Figure 7 It is a schematic diagram of the action structure of the utility model.

[0022] Label Description

[0023] 1: Tension spring; 2: Lifting bracket; 3: Slide rail; 4: Sofa backrest mounting base; 5: Moving crossbar; 6: Lifting device; 7: Unlocking crossbar; 8: Base; 9: Fixed crossbeam; 10: Connecting frame base; 11: Locking notch; 12: Unlocking rocker; 13: Locking column; 14: Locking buckle; 15: Latch; 16: Ramp; 17: Rotating shaft; 18: Wear-resistant gasket; 19: Electric push rod; 20: Sensor device. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Example 1

[0026] like Figure 1-7 As shown, a mechanical lifting backrest bracket includes a base 8, a slide rail 3, a movable cross bar 5, a lifting bracket 2, an unlocking device, and a lifting device; a fixed cross beam 9 is provided between the base 8, and the movable cross bar 5 is provided at the top of the base 8. The lifting device is a free-style gas spring, the cylinder of the free-style gas spring is connected to the middle part of the fixed cross beam 9, and the output end of the free-style gas spring is connected to the middle part of the movable cross bar 5; the two ends of the movable cross bar 5 are fixedly connected to the lifting bracket 2; the unlocking device cooperates with the lifting bracket 2. In the unlocked state, the output end of the free-style gas spring drives the movable cross bar 5 to rise and fall along the slide rail 3. In the locked state, the output end of the free-style gas spring cannot drive the movable cross bar 5 to rise and fall.

[0027] In this embodiment, the upper end of the lifting bracket 2 is fixedly connected to the left and right ends of the movable crossbar 5, and the slide rail 3 is fixed between the base 8 and the lifting bracket 2. The lifting bracket 2 can slide up and down along the slide rail 3. This structure ensures that the lifting bracket 2 slides along the direction of the slide rail 3 during the lifting process, plays a guiding role, and ensures smooth sliding.

[0028] In this embodiment, a locking notch 11 is provided at the lower part of the lifting bracket 2, and the unlocking device includes an unlocking cross bar 7, an unlocking rocker 12, a lock buckle 14 and a tension spring 1. The two ends of the unlocking cross bar 7 are respectively fixedly connected to the upper end of the unlocking rocker 12, and the lower end of the unlocking rocker 12 is fixedly connected to the lock buckle 14, and is hinged to the base 8 through a rotating shaft 17. When the unlocking rocker 12 is rotated, the lock buckle 14 is driven to rotate at the same time; a raised locking column 13 is provided on the lock buckle 14, one end of the tension spring 1 is fixed to the base 8, and the other end is connected to the locking column 13. When the locking column 13 is located in the locking notch 11, the lifting and lowering movement of the lifting bracket 2 is restricted; when the locking column 13 is out of the locking notch 11, the lifting bracket 2 can be lifted and lowered.

[0029] In this embodiment, a slope 16 is provided on the lower part of the lifting bracket 2 on the side facing the lock buckle 14. The setting of the slope 16 allows the locking column 13 to slowly climb along the slope 16 when the lifting bracket 2 is reset downward, slowly pulling the tension spring 1 apart, thereby avoiding the situation where the tension spring 1 and the lifting bracket 2 are stuck due to direct pulling apart.

[0030] In this embodiment, Figure 6 As shown, a latch 15 or a retaining spring is provided on the rotating shaft 17, and a wear-resistant gasket 18 is provided between the latch 15 or the retaining spring and the base 8. This structure prolongs the service life of the parts.

[0031] In this embodiment, the left and right ends of the unlocking cross bar 7 are fixedly connected to the unlocking rocker 12 respectively. The unlocking rocker 12 is provided at both ends of the unlocking cross bar 7, which increases the stability of locking and unlocking the unlocking cross bar 7 and avoids the uneven force when the human body hits the unlocking cross bar 7 during use, causing the unlocking cross bar 7 to twist, resulting in an erroneous triggering state.

[0032] In this embodiment, the fixed crossbeam 9 and the movable crossbar 5 are both provided with a connecting frame base 10 in the middle. The cylinder and output end of the free-style gas spring are respectively hinged to these two connecting frame bases 10 via pins. This structure allows the pneumatic spring to extend and retract with a certain degree of rotational flexibility, avoiding the problem of the movable crossbeam being stuck during the raising and lowering of the movable crossbeam.

[0033] In this embodiment, a sofa backrest mounting seat 4 is provided on the movable cross bar 5 or the lifting bracket 2, and the sofa backrest mounting seat 4 is used for being installed and connected to the sofa backrest.

[0034] Working principle, such as Figure 7As shown, during use of the lifting mechanism of the utility model, the user impacts the backrest with a certain force, causing the internal filling of the backrest to collapse and drive the unlocking crossbar 7 to move backward. The unlocking crossbar 7 then drives the unlocking rocker 12 to rotate, and the lock buckle 14 rotates simultaneously. The locking post 13 located at the lock buckle 14 disengages from the locked position of the locking notch 11. The movable crossbar 5, under the action of the free-style gas spring, drives the entire backrest to move diagonally upward along the slide rail 3, thereby achieving the sofa backrest bracket driving the sofa backrest to rise. To lower the backrest, a downward force is generally applied from above the backrest, and the described lifting bracket 2 moves downward until the backrest descends to the locked position. At this time, the locking post 13, under the action of the tension spring 1, is engaged in the locking notch 11, and the lifting bracket 2 is locked and no longer moves.

[0035] Example 2

[0036] This embodiment differs from the comparative document 1 in that the unlocking device is a sensor device 20, and the lifting device is an electric push rod 19. The sensor device 20 can be a pressure sensor or a sensor device with a micro switch, installed between the unlocking device and the base 8. When the user hits the backrest with a certain force, the unlocking device is triggered, causing the sensor device to sense the impact signal and then send a signal to the circuit board (the circuit board serves as the control center). The circuit board then sends the execution command to perform the lifting to the lifting device (here, the electric push rod 19), and the electric push rod 19 performs the lifting.

[0037] In the description of the specification of the present invention, it should be understood that the terms "upper end", "lower end", "left and right ends", "lower part", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0038] In this utility model, unless otherwise specified or limited, the term "connection" and other terms should be understood in a broad sense. For example, it can mean fixed connection, detachable connection, or integration; it can be directly connected or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mechanical lifting backrest bracket, characterized in that The invention comprises a base (8), a slide rail (3), a movable cross bar (5), a lifting bracket (2), an unlocking device, and a lifting device; a fixed cross bar (9) is provided between the bases (8); the movable cross bar (5) is provided at the top of the base (8); one end of the lifting device is connected to the middle of the fixed cross bar (9), and the other end is connected to the middle of the movable cross bar (5); both ends of the movable cross bar (5) are fixedly connected to the lifting bracket (2); the unlocking device cooperates with the lifting bracket (2); in the unlocked state, the lifting device drives the movable cross bar (5) to move up and down along the slide rail (3); in the locked state, the lifting device cannot drive the movable cross bar (5) to move up and down.

2. A mechanical lifting backrest bracket according to claim 1, characterized in that The upper end of the lifting bracket (2) is fixedly connected to the left and right ends of the movable crossbar (5), and the slide rail (3) is fixed between the base (8) and the lifting bracket (2). The lifting bracket (2) can slide up and down along the slide rail (3).

3. The mechanical lifting backrest bracket according to claim 1, characterized in that The lower part of the lifting bracket (2) is provided with a locking notch (11), and the unlocking device includes an unlocking cross bar (7), an unlocking rocker (12), a lock buckle (14) and a tension spring (1). The two ends of the unlocking cross bar (7) are respectively fixedly connected to the upper end of the unlocking rocker (12), the lower end of the unlocking rocker (12) is fixedly connected to the lock buckle (14), and is hinged to the base (8) through a rotating shaft (17). When the unlocking rocker (12) is rotated, the lock buckle (14) is driven to rotate at the same time; a protruding locking column (13) is provided on the lock buckle (14), one end of the tension spring (1) is fixed to the base (8), and the other end is connected to the locking column (13). When the locking column (13) is located in the locking notch (11), the lifting bracket (2) is restricted from lifting and lowering; when the locking column (13) is separated from the locking notch (11), the lifting bracket (2) can be lifted and lowered.

4. The mechanical lifting backrest bracket according to claim 3, characterized in that A slope (16) is provided on the lower part of the lifting bracket (2) facing the lock buckle (14).

5. The mechanical lifting backrest bracket according to claim 3, characterized in that The rotating shaft (17) is provided with a latch (15) or a retaining spring, and a wear-resistant gasket (18) is provided between the latch (15) or the retaining spring and the base (8).

6. The mechanical lifting backrest bracket according to claim 1, characterized in that The middle parts of the fixed crossbeam (9) and the movable crossbar (5) are both provided with a connecting frame base (10), and the two ends of the lifting device are respectively hinged to the two connecting frame bases (10).

7. The mechanical lifting backrest bracket according to claim 1, characterized in that The movable crossbar (5) or the lifting bracket (2) is provided with a sofa backrest mounting seat (4), and the sofa backrest mounting seat (4) is used for being installed and connected with the sofa backrest.

8. The mechanical lifting backrest bracket according to claim 1, characterized in that The lifting device is a free-style gas spring.

9. The mechanical lifting backrest bracket according to claim 1, characterized in that The unlocking device includes a sensing device and a lifting device.

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