Lifting mechanism and sofa

Abstract

The present application relates to the technical field of furniture, and discloses a lifting mechanism, which comprises a fixed support, a lifting support and an elastic supporting piece; the two ends of the elastic supporting piece are rotatably connected with the fixed support and the lifting support respectively, and a limiting piece is arranged on the fixed support; a sofa comprises a seat frame and a backrest assembly, and the lifting mechanism is arranged between the seat frame and the backrest assembly; the fixed support is arranged on the seat frame, and the lifting support is connected with the backrest assembly. The present application has the beneficial effects of stable structure, convenient and safe use.

Description

Technical Field

[0001] This invention relates to the field of furniture technology, and more particularly to a lifting mechanism and a sofa. Background Technology

[0002] Sofas are a common type of furniture, and the backrests and armrests of ordinary sofas are usually not adjustable. To expand the functionality of sofas, some sofas now feature adjustable backrests. However, these lifting mechanisms are usually electrically, hydraulically, or pneumatically controlled, requiring electricity to operate. This means that the lifting is achieved by controlling a motor or pump, resulting in complex lifting mechanisms, poor stability, and potential safety hazards. Summary of the Invention

[0003] In order to solve the above-mentioned problems in the prior art, the present invention provides a lifting mechanism and sofa that are structurally stable, easy to use and safe.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A lifting mechanism is disposed between a fixed component and a lifting component, comprising a fixed bracket for connection to the fixed component; a lifting bracket for connection to the lifting component, the lifting bracket being rotatably connected to the fixed bracket; and an elastic support component disposed between the fixed component and the lifting bracket; wherein, both ends of the elastic support component are rotatably connected to the fixed component and the lifting bracket respectively, and the fixed bracket is provided with a limiting component; when the lifting bracket rotates to its lowest position, the elastic support component exerts pressure on the lifting bracket, causing the lifting bracket to abut and lock against the limiting component; when an external force is applied to the lifting component, causing the lifting bracket to release the self-locking, the lifting component rotates and rises to a preset position under the action of the elastic support component.

[0005] This type of lifting mechanism can achieve rising and falling without the need for motors, cylinders, or hydraulic cylinders. It utilizes the elastic force of the elastic support and the dead point of the mechanism to enable self-locking when it descends to the lowest point. After the self-locking is released by external force, the elastic potential energy of the elastic support will rotate the lifting component to the preset position. The overall structure is stable and easy and safe to use.

[0006] Preferably, the lifting support includes a crossbeam and connecting brackets fixed at both ends of the crossbeam. The connecting brackets are rotatably connected to the fixed bracket, the front end of the elastic support is rotatably connected to the crossbeam, and the rear end of the elastic support is rotatably connected to the fixed bracket. By providing two sets of connecting brackets connected to the lifting component, the overall lifting is more stable.

[0007] Preferably, the connecting bracket includes an upper connecting frame, a lower connecting frame parallel to the upper connecting frame, and several rotating parts. The two ends of each rotating part are rotatably connected to the upper connecting frame and the lower connecting frame, respectively, and the middle portion of each rotating part is rotatably connected to the fixed bracket. When the lifting member descends to its lowest position, the front end of the elastic support member tilts downwards and acts on the crossbeam, causing the rotating part to abut and lock against the limiting member. When the lifting member descends to its lowest point, the rotating part abuts against the limiting member, restricting the rotating part from continuing to rotate downwards.

[0008] Preferably, the rotating component is L-shaped, with its bend rotatably connected to the fixed bracket, and a bend portion provided between the bend portion and the lower connecting frame. When the lifting component rises to a preset position, the upper connecting frame rotates to the bend portion and is limited by it. The lifting component, upon reaching the preset position, is limited by the bend portion on the rotating component to the upper connecting frame.

[0009] Preferably, the elastic support is configured as a telescopic rod. The telescopic rod can extend and retract axially and store potential energy, thereby providing assistance for the lifting of the lifting component.

[0010] Preferably, a locking mechanism is provided between the fixing member and the lifting member. The locking mechanism includes a locking component disposed on the fixing member and a locking seat disposed on the lifting member. The locking component includes a connecting seat, a locking member that can move relative to the connecting seat and elastically reset, and an unlocking component that drives the locking member to unlock. When the locking seat moves to abut against the locking member, the locking member is pressed to avoid contact, so that the locking seat is locked after passing the locking member. When the lifting member rotates and rises to a preset position, the locking mechanism locks and limits the locking seat on the lifting member. When the lifting member needs to be lowered, the unlocking component unlocks the locking member, and then the lifting member is pressed down to the lowest position and self-locks.

[0011] Preferably, the locking member is slidably connected to the connecting seat, the upper end of the locking member is provided with an inclined pressure-bearing surface, the lower end of the locking member is rotatably provided with a connecting arm, and an elastic reset member for resetting the locking member is provided between the connecting arm and the fixing member; the unlocking component is connected to the connecting arm and drives the locking member to retract and avoid the locking seat.

[0012] Preferably, the unlocking assembly includes a drive arm and a cable. The middle part of the drive arm is rotatably connected to the connecting seat. One end of the drive arm is hinged to the connecting arm, and the other end of the drive arm is connected to the cable. The connecting seat is provided with a limiting pin. When the cable is pulled, the drive arm drives the connecting arm to rotate until it abuts against the limiting pin. The connecting arm and the drive arm are in a self-locking state under the action of the elastic reset member, and the locking member retracts to unlock.

[0013] Preferably, the lower side of the connecting arm is provided with a rearward protruding lug. When the lifting component descends to the lowest position, the locking seat abuts against the lug and pushes the connecting arm to rotate, thereby releasing the self-locking state of the connecting arm and the drive arm.

[0014] A sofa includes a seat frame and a backrest assembly. A lifting mechanism is provided between the seat frame and the backrest assembly. A fixed bracket is mounted on the seat frame, and the lifting bracket is connected to the backrest assembly. Applying this lifting mechanism to a sofa allows for the raising and lowering of the backrest assembly, further expanding the sofa's functionality.

[0015] Preferably, the backrest assembly includes a backrest body and armrests fixed at both ends of the backrest body. The top surfaces of the backrest body and the armrests are coplanar. When the backrest assembly is lowered to the lowest position and self-locked, the top surface of the backrest assembly is coplanar with the top surface of the seat frame.

[0016] Therefore, the present invention has the advantages of stable structure and convenient and safe use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of one structure of the present invention.

[0018] Figure 2 for Figure 1 Another perspective view.

[0019] Figure 3 This is a schematic diagram showing the connection between the fixed bracket, the lifting bracket, and the elastic support.

[0020] Figure 4 This is a schematic diagram showing the connection between the connecting bracket and the fixed bracket.

[0021] Figure 5 This is a schematic diagram of the locking mechanism.

[0022] Figure 6 Schematic diagram of the backrest assembly in the raised state.

[0023] Figure 7 This is a schematic diagram showing the locking state of the locking assembly and the locking seat.

[0024] Figure 8 for Figure 7 A schematic diagram of the status of the connecting bracket.

[0025] Figure 9 This is a schematic diagram showing the positions of the locking seat and the locking element in the locked state.

[0026] Figure 10 This is a diagram showing the locking seat descending to abut against the lug after unlocking.

[0027] Figure 11This is a structural diagram of a sofa.

[0028] Figure 12 A schematic diagram showing the connection between the seat frame and the lifting mechanism. Detailed Implementation

[0029] To make the technical problems to be solved, the technical solutions, and the beneficial technical effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this invention.

[0030] It should be understood that the terms "first," "second," etc., used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly specifying the number of technical features indicated. Features specified as "first" or "second" may expressly or implicitly indicate that at least one of those features is included.

[0031] like Figures 1-5 The illustrated lifting mechanism is disposed between a fixed member 1 and a lifting member 2, including a fixed bracket 10 for connection to the fixed member 1; a lifting bracket 20 for connection to the lifting member 2, the lifting bracket 20 being rotatably connected to the fixed bracket 10; and an elastic support member 40 disposed between the fixed member 1 and the lifting bracket 20. Both ends of the elastic support member 40 are rotatably connected to the fixed member 1 and the lifting bracket 20 respectively, and a limiting member 11 is provided on the fixed bracket 10. When the lifting bracket 20 rotates to its lowest position, the elastic support member 40 exerts pressure on the lifting bracket 20, causing the lifting bracket 20 to abut and lock against the limiting member 11. When an external force is applied to the lifting member 2, causing the lifting bracket 20 to release its self-locking mechanism, the lifting member 2 rotates and rises to a preset position under the action of the elastic support member 40. The elastic support member 40 is configured as an elastic telescopic rod; in this embodiment, the elastic support member 40 is a gas spring, and the limiting member 11 is a limiting post, limiting pin, or limiting block.

[0032] The lifting support 20 includes a crossbeam 21 and connecting supports 22 fixed at both ends of the crossbeam 21. The connecting supports 22 are rotatably connected to the fixed support 10. The front end of the elastic support 40 is rotatably connected to the crossbeam 21, and the rear end of the elastic support 40 is rotatably connected to the fixed support 10. The connecting support 22 includes an upper connecting frame 220, a lower connecting frame 221 parallel to the upper connecting frame 220, and several rotating parts 222. The two ends of the rotating parts 222 are rotatably connected to the upper connecting frame 220 and the lower connecting frame 221, respectively, and the middle part of the rotating parts 222 is rotatably connected to the fixed support 10. When the lifting member 2 descends to the lowest position, the front end of the elastic support 40 tilts downward and acts on the crossbeam 21, causing the rotating parts 222 to abut and lock against the limiting member 11. Figure 3The state shown is the self-locking state of the rotating part. The angle (α) between the axis of the elastic support 40 (dashed line a, where a is parallel to a1) and the horizontal plane is greater than the angle (β) between the line connecting the two rotation points at the upper end of the rotating part (dashed line b) and the horizontal plane. This causes the upper connecting part 220 to generate a force that drives the rotating part 222 to rotate counterclockwise. Since the rotating part is limited in the counterclockwise direction by the limiting part 11, self-locking is formed.

[0033] The rotating component 222 is L-shaped, and its bent portion is rotatably connected to the fixed bracket 10. A bending portion 2220 is provided between the bent portion of the rotating component 222 and the lower connecting frame 221. When the lifting component 2 rises to a preset position, the upper connecting frame 220 rotates to the bending portion 2220 and is limited by it, as shown in the limiting state. Figure 8 As shown.

[0034] like Figure 3 and Figure 5 As shown, a locking mechanism 50 is provided between the fixed member 1 and the lifting member 2. The locking mechanism 50 includes a locking component 51 provided on the fixed member 1 and a locking seat 52 provided on the lifting member 2. The locking component 51 includes a connecting seat 510, a locking member 511 that can move relative to the connecting seat 510 and elastically reset, and an unlocking component 53 that drives the locking member 511 to unlock. When the locking seat 52 moves to abut against the locking member 511, the locking member 511 is pressed to avoid the locking seat 52, so that the locking seat 52 is locked after passing the locking member 511.

[0035] The locking member 511 is slidably connected to the connecting seat 510. The upper end of the locking member 511 is provided with an inclined bearing surface 5110, and the lower end of the locking member 511 is rotatably provided with a connecting arm 512. An elastic reset member 513 for resetting the locking member 511 is provided between the connecting arm 512 and the fixing member 1. The unlocking component 53 is connected to the connecting arm 512 and drives the locking member 511 to retract and avoid the locking seat 52. In this embodiment, the elastic reset member is a tension spring, and the locking seat 52 is a locking pin.

[0036] The unlocking assembly 53 includes a drive arm 530 and a cable 531. The middle part of the drive arm 530 is rotatably connected to the connecting seat 510. One end of the drive arm 530 is hinged to the connecting arm 512, and the other end of the drive arm 530 is connected to the cable 531. The connecting seat 510 is provided with a limiting pin 54. When the cable 531 is pulled, the drive arm 530 drives the connecting arm 512 to rotate until it abuts against the limiting pin 54. The connecting arm 512 and the drive arm 530 are in a self-locking state under the action of the elastic reset member 513, and the locking member 511 retracts to unlock. The lower end of the connecting arm 512 is provided with a rearward protruding lug 5120. When the lifting member 2 descends to the lowest position, the locking seat 52 abuts against the lug 5120 and pushes the connecting arm 512 to rotate, so that the connecting arm 512 and the drive arm 530 are released from the self-locking state.

[0037] When the lifting component 2 is at its lowest position, the locking mechanism is in the following state: Figure 5 As shown, at this time, the locking seat 51 is located below and does not contact the lug 5120; a backward force is applied to the lifting member, causing the rotating member to rotate clockwise by an angle, thereby changing the angle between the axis of the elastic support member 40 and the horizontal plane, thus releasing the self-locking. Under the elastic force of the elastic support member 40, the rotating member rotates clockwise to... Figure 7 and Figure 8 As shown in the diagram, during this process, the locking seat 52 follows... Figure 9 The dashed trajectory shown rotates to the pressure surface 5110 of the locking member 511. The pressure on the pressure surface 5110 causes the locking member 511 to contract downwards. After the locking seat 52 passes the locking member, the locking member is reset to its original position under the action of the elastic reset member 513. Figure 9 In the state shown, clockwise, the upper connecting frame 220 is limited by the bent portion 2220 on the rotating member 222, and counterclockwise, the locking seat 52 is limited by the locking member 511. The lifting member is completely limited after rising to the high position.

[0038] When it is necessary to lower the lifting component 2, pull the cable 531, and the drive arm 530 will drive the connecting arm 512 to rotate. Figure 10 In the indicated state, locking member 511 descends and unlocks, and connecting arm 512 abuts against limit pin 54 to form a self-locking state; then external force is applied to the lifting member to press it down, and locking member 511 moves along... Figure 10 The dotted line trajectory rotates until it abuts against the lug, pushing the connecting arm 512 to rotate counterclockwise by an angle. After the connecting arm 512 releases its self-locking, it is reset to its original position under the action of the elastic reset member 513. Figure 9 The state shown.

[0039] like Figure 6 , Figure 11 and Figure 12 The sofa shown includes a seat frame 6 and a backrest assembly 7. A lifting mechanism is provided between the seat frame 6 and the backrest assembly 7. A fixed bracket 10 is set on the seat frame 6, and a lifting bracket 20 is connected to the backrest assembly 7. That is, the fixed component is configured as the seat frame, and the lifting component is configured as the backrest assembly. A pull ring is provided at the end of the cable, and the cable is guided from the gap between the backrest assembly and the seat frame to the top edge of the seat frame. The backrest assembly 7 includes a backrest body 70 and armrests 71 fixed at both ends of the backrest body 70. The top surfaces of the backrest body 70 and the armrests 71 are coplanar. When the backrest assembly 7 is lowered to the lowest position and self-locked, the top surface of the backrest assembly 7 is coplanar with the top surface of the seat frame 6. The seat frame 6 has notches 60 on both sides. The lifting bracket 20 extends out of the seat frame 6 from the notches 60 and is fixedly connected to the inside of the backrest body 70.

[0040] The backrest assembly 7 of this type of sofa can be raised or lowered as needed. The state of the backrest assembly after being lowered is as follows: Figure 1 At this time, the top surface of the entire sofa forms a flat surface, and people can sit on all four sides. When the backrest assembly 7 needs to be raised, a person sits on the seat frame and applies a backward force to the armrests with both hands. At this time, the backrest assembly 7 rises under the action of the elastic support and is locked and limited. When the backrest assembly 7 needs to be lowered, the cable is pulled to unlock the locking mechanism, and the backrest assembly is pressed down. When the backrest assembly is lowered to the lowest point, it self-locks and is limited.

[0041] In the description of this invention, it should be understood that the directions or positional relationships indicated by up, down, left, right, inner end, outer end, one end, and the other end are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the purpose of more clearly describing the technical solutions of this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting this invention.

[0042] Although specific embodiments of the invention have been described in detail herein, they are given for illustrative purposes only and should not be construed as limiting the scope of the invention. Various substitutions, alterations, and modifications can be conceived without departing from the spirit and scope of the invention.

Claims

1. A lifting mechanism, disposed between a fixed member (1) and a lifting member (2), characterized in that, Includes a fixed bracket (10) for connection with the fastener (1); A lifting bracket (20) is used to connect with the lifting component (2), and the lifting bracket (20) is rotatably connected to the fixed bracket (10); and an elastic support (40) is provided between the fixed component (1) and the lifting bracket (20). The lifting support (20) includes a crossbeam (21) and a connecting support (22) fixed at both ends of the crossbeam (21). The connecting support (22) is rotatably connected to the fixed support (10). The front end of the elastic support (40) is rotatably connected to the crossbeam (21), and the rear end of the elastic support (40) is rotatably connected to the fixed support (1). The connecting bracket (22) includes an upper connecting frame (220), a lower connecting frame (221) parallel to the upper connecting frame (220), and a plurality of rotating parts (222). The two ends of the rotating parts (222) are rotatably connected to the upper connecting frame (220) and the lower connecting frame (221) respectively, and the middle part of the rotating parts (222) is rotatably connected to the fixed bracket (10). A locking mechanism (50) is provided between the fixing member (1) and the lifting member (2). The locking mechanism (50) includes a locking component (51) provided on the fixing member (1) and a locking seat (52) provided on the lifting member (2). The locking component (51) includes a connecting seat (510), a locking member (511) that can move relative to the connecting seat (510) and elastically reset, and an unlocking component (53) that drives the locking member (511) to unlock. The elastic support (40) is rotatably connected to the fixed member (1) and the lifting bracket (20) at both ends, and the fixed bracket (10) is provided with a limiting member (11). When the lifting bracket (20) rotates to the lowest position, the elastic support (40) exerts pressure on the lifting bracket (20), and the angle between the axis of the elastic support (40) and the horizontal plane is greater than the angle between the line connecting the two rotation points at the upper end of the rotating member (222) and the horizontal plane, so that... The rotating part (222) abuts against the limiting part (11) and locks itself under the pressure; when the external force acts on the lifting part (2) and causes the lifting bracket (20) to release the self-locking, the lifting part (2) rotates and rises to the preset position under the action of the elastic support (40), and when the locking seat (52) moves to abut against the locking part (511), the locking part (511) is pressed to avoid the locking seat (52) and is locked after passing the locking part (511).

2. The lifting mechanism according to claim 1, characterized in that, The rotating part (222) is L-shaped. The bent part of the rotating part (222) is rotatably connected to the fixed bracket (10). A bending part (2220) is provided between the bent part of the rotating part (222) and the lower connecting frame (221). When the lifting component (2) rises to the preset position, the upper connecting frame (220) rotates to the bending part (2220) and is limited by the bending part (2220).

3. The lifting mechanism according to claim 1, characterized in that, The elastic support (40) is configured as an elastic telescopic rod.

4. A lifting mechanism according to claim 1, characterized in that, The locking member (511) is slidably connected to the connecting seat (510). The upper end of the locking member (511) is provided with an inclined bearing surface (5110). The lower end of the locking member (511) is rotatably provided with a connecting arm (512). An elastic reset member (513) for resetting the locking member (511) is provided between the connecting arm (512) and the fixing member (1). The unlocking component (53) is connected to the connecting arm (512) and drives the locking member (511) to retract and avoid the locking seat (52).

5. A lifting mechanism according to claim 4, characterized in that, The unlocking component (53) includes a drive arm (530) and a cable (531). The middle part of the drive arm (530) is rotatably connected to the connecting seat (510). One end of the drive arm (530) is hinged to the connecting arm (512), and the other end of the drive arm (530) is connected to the cable (531). The connecting seat (510) is provided with a limiting pin (54). When the cable (531) is pulled, the drive arm (530) drives the connecting arm (512) to rotate until it abuts against the limit pin (54). The connecting arm (512) and the drive arm (530) are in a self-locking state under the action of the elastic reset member (513), and the locking member (511) retracts to unlock.

6. A lifting mechanism according to claim 5, characterized in that, The lower side of the connecting arm (512) is provided with a rearward protruding lug (5120). When the lifting member (2) descends to the lowest position, the locking seat (52) abuts against the lug (5120) and pushes the connecting arm (512) to rotate, so that the connecting arm (512) and the driving arm (530) are released from the self-locking state.

7. A sofa comprising a seat frame (6) and a backrest assembly (7), characterized in that, A lifting mechanism as described in any one of claims 1-6 is provided between the seat frame (6) and the backrest assembly (7), the fixed bracket (10) is disposed on the seat frame (6), and the lifting bracket (20) is connected to the backrest assembly (7).

8. A sofa according to claim 7, characterized in that, The backrest assembly (7) includes a backrest body (70) and armrests (71) fixed at both ends of the backrest body (70). The top surfaces of the backrest body (70) and the armrests (71) are coplanar. When the backrest assembly (7) is lowered to the lowest position and self-locked, the top surface of the backrest assembly (7) is coplanar with the top surface of the seat frame (6).

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