A backrest angle-adjustable sofa

Abstract

The utility model discloses a backrest angle adjustable sofa relates to sofa technical field, including the sofa base with metal framework and the outside keeps being wrapped with the sponge pad, and the sofa backrest rotationally installed at the top end of sofa base still includes setting on the sofa base, the adjusting mechanism for adjusting the angle of sofa backrest of sofa backrest is adjusted to the angle of sofa, can be when needing, through giving the rotary sleeve end disc rotation power, makes rotary sleeve gives screw rod helical extrusion thrust, makes the fixed resistance block of screw rod end portion along the inner cavity axial movement of positioning groove, and resistance block is axially moved while, along the inner cavity relative movement of guide groove to give transmission rod rotation thrust, makes sofa backrest, transmission rod with the center rotation of connecting sleeve to adjust the angle of sofa backrest, further improve the comfort of sofa.

Description

Technical Field

[0001] This utility model relates to the field of sofa technology, specifically a sofa with an adjustable backrest angle. Background Technology

[0002] A sofa is a type of upholstered, multi-seat chair with a backrest made of springs or thick foam and armrests on both sides; it is a type of soft furnishing furniture.

[0003] In the existing technology, sofas are generally purchased as home furnishings for daily rest and conversation. The backrest angle of existing sofas is generally not adjustable, and they rely on the characteristics of the sofa's own foam to adapt to the human back. Sitting for a long time can cause back pain. In order to improve the comfort of sofas and make it easier to adjust the backrest angle, this utility model proposes a sofa with an adjustable backrest angle. Utility Model Content

[0004] The purpose of this utility model is to provide a sofa with an adjustable backrest angle in order to solve the problems mentioned in the background.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a sofa with an adjustable backrest angle, comprising a sofa base with a metal frame and an outer layer of sponge padding, and a sofa backrest rotatably mounted on the top of the sofa base, and further comprising an adjustment mechanism provided on the sofa base and the sofa backrest for adjusting the angle of the sofa backrest.

[0006] The adjustment mechanism includes a transmission unit and a support unit;

[0007] The support unit is used to provide support for the rotation of the sofa back;

[0008] The transmission unit is used to provide thrust for the movement of the support unit.

[0009] As a further embodiment of this utility model: the support unit includes a connecting sleeve, a transmission rod, and a guide groove;

[0010] The connecting sleeve is fixed to the bottom metal frame of the sofa backrest and sleeved on the outer layer of the inner shaft at the top of the sofa base. The connecting sleeve is used to provide support for the rotation of the sofa backrest. The transmission rod is fixed to the outer wall of the connecting sleeve and extends into the interior of the sofa base. The inner cavity of the transmission rod is formed with a guide groove to receive the thrust from the abutment.

[0011] As a further embodiment of this utility model: the transmission unit includes a rotating sleeve, a lead screw, a stop block, and a positioning groove;

[0012] The rotating sleeve is rotatably installed on the inner wall of the sofa base and extends to the outer end of the sofa base. The rotating sleeve is used to provide a compressive thrust for the axial movement of the lead screw. The lead screw is threaded into the inner cavity of the rotating sleeve and extends to the outer end of one end of the rotating sleeve. The abutment is fixed to the end of the lead screw and is sleeved in the inner cavity of the guide groove. The two ends of the abutment extend into the inner cavity of the positioning groove. The positioning groove is symmetrically opened inside the sofa base.

[0013] As a further improvement of this utility model, the outer wall of the abutment block matches the inner cavity of the guide groove and the positioning groove.

[0014] As a further improvement of this utility model, the inner cavity of the rotating sleeve is formed with a threaded groove that matches the thread on the outer wall of the lead screw.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] By setting up an adjustment mechanism, when the angle of the sofa needs to be adjusted, the rotating sleeve end of the rotating sleeve is given rotational power, which causes the rotating sleeve to apply a spiral pressing force to the lead screw. This causes the fixed block at the end of the lead screw to move axially along the inner cavity of the positioning groove. At the same time, the block moves relative to the inner cavity of the guide groove, thereby giving the transmission rod rotational thrust. This causes the sofa backrest and the transmission rod to rotate around the connecting sleeve, thereby adjusting the angle of the sofa backrest and further improving the comfort of the sofa. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the adjustment mechanism of this utility model;

[0019] Figure 3 This is a partial enlarged view of point A of this utility model.

[0020] In the diagram: 1. Sofa base; 2. Sofa backrest; 3. Adjustment mechanism; 301. Connecting sleeve; 302. Transmission rod; 303. Guide groove; 304. Rotating sleeve; 305. Lead screw; 306. Abutment block; 307. Positioning groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-3 In this embodiment of the utility model, a sofa with an adjustable backrest angle includes a sofa base 1 with a metal frame and a sponge pad on the outside, and a sofa backrest 2 rotatably mounted on the top of the sofa base 1. It also includes an adjustment mechanism 3 disposed on the sofa base 1 and the sofa backrest 2 for adjusting the angle of the sofa backrest 2.

[0023] The adjustment mechanism 3 includes a transmission unit and a support unit;

[0024] The support unit is used to provide support for the rotation of the sofa backrest 2;

[0025] The transmission unit is used to provide thrust for the movement of the support unit;

[0026] The support unit includes a connecting sleeve 301, a transmission rod 302, and a guide groove 303;

[0027] The connecting sleeve 301 is fixed to the bottom metal frame of the sofa back 2 and sleeved on the outer layer of the inner shaft at the top of the sofa base 1. The connecting sleeve 301 is used to provide support for the rotation of the sofa back 2. The transmission rod 302 is fixed to the outer wall of the connecting sleeve 301 and extends into the interior of the sofa base 1. The inner cavity of the transmission rod 302 is formed with a guide groove 303 to receive the thrust from the abutment 306.

[0028] The transmission unit includes a rotating sleeve 304, a lead screw 305, a stop block 306, and a positioning groove 307;

[0029] The rotating sleeve 304 is rotatably installed on the inner wall of the sofa base 1 and extends to the outer end of the sofa base 1. The rotating sleeve 304 is used to provide a pressing force to the lead screw 305 for axial movement. The lead screw 305 is threadedly connected to the inner cavity of the rotating sleeve 304 and extends to the outer end of one end of the rotating sleeve 304. The abutment 306 is fixed to the end of the lead screw 305. The abutment 306 is sleeved in the inner cavity of the guide groove 303, and the two ends of the abutment 306 extend to the inner cavity of the positioning groove 307. The positioning groove 307 is symmetrically opened inside the sofa base 1.

[0030] In this embodiment: when the angle of the sofa backrest 2 needs to be adjusted for better user comfort, a rotational force is applied to the rotating sleeve 304, causing the threaded rod 305 connected to the inner wall of the rotating sleeve 304 to be subjected to a helical pressing force from the threaded groove on the inner wall of the rotating sleeve 304. Since the two ends of the abutment 306 fixed at the end of the threaded rod 305 are inserted into the inner cavity of the positioning groove 307, the threaded rod 305 and the abutment 306 will move axially along the inner cavity of the positioning groove 307 under the rotational thrust of the rotating sleeve 304. The axial movement of the abutment 306... Simultaneously moving relative to each other along the inner cavity of the guide groove 303, since the guide groove 303 and the transmission rod 302 are rotatably connected to the shaft of the sofa base 1 with the connecting sleeve 301 as the midpoint, when the guide groove 303 is pushed by the abutment block 306, the guide groove 303 transmits the rotational force to the transmission rod 302 and the connecting sleeve 301, causing the transmission rod 302 and the connecting sleeve 301 to rotate. The rotating connecting sleeve 301 will synchronously drive the sofa back 2 fixed on the outer wall to rotate synchronously, adjusting the angle of the sofa back 2 so that the user can quickly adjust the backrest angle.

[0031] Please refer to this carefully. Figures 1-3 The outer wall of the abutment 306 matches the inner cavity of the guide groove 303 and the positioning groove 307, and the inner cavity of the rotating sleeve 304 is formed with a threaded groove that matches the thread on the outer wall of the lead screw 305.

[0032] In this embodiment: With this structure, when the rotating sleeve 304 rotates, it is affected by the abutment 306, so that the lead screw 305 can only receive the rotational thrust from the rotating sleeve 304, so that the rotating sleeve 304 will give the lead screw 305 a helical thrust to move outward or inward through the thread.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sofa with an adjustable backrest angle, comprising a sofa base (1) with a metal frame and an outer surface covered with a sponge pad, and a sofa backrest (2) rotatably mounted on top of the sofa base (1), characterized in that, It also includes an adjustment mechanism (3) set on the sofa base (1) and the sofa back (2) for adjusting the angle of the sofa back (2); The adjustment mechanism (3) includes a transmission unit and a support unit; The support unit is used to provide support for the rotation of the sofa back (2); The transmission unit is used to provide thrust for the movement of the support unit.

2. The adjustable backrest sofa according to claim 1, characterized in that, The support unit includes a connecting sleeve (301), a transmission rod (302), and a guide groove (303); The connecting sleeve (301) is fixed to the bottom metal frame of the sofa back (2) and sleeved on the outer layer of the inner side shaft at the top of the sofa base (1). The connecting sleeve (301) is used to provide support for the rotation of the sofa back (2). The transmission rod (302) is fixed to the outer wall of the connecting sleeve (301) and extends into the interior of the sofa base (1). The inner cavity of the transmission rod (302) is formed with a guide groove (303) to receive the thrust from the abutment (306).

3. The adjustable backrest sofa according to claim 1, characterized in that, The transmission unit includes a rotating sleeve (304), a lead screw (305), a stop block (306), and a positioning groove (307); The rotating sleeve (304) is rotatably mounted on the inner wall of the sofa base (1) and extends to the outer end of the sofa base (1). The rotating sleeve (304) is used to provide a squeezing force for the axial movement of the lead screw (305). The lead screw (305) is threadedly connected to the inner cavity of the rotating sleeve (304) and extends to the outer end of one end of the rotating sleeve (304). The abutment (306) is fixed to the end of the lead screw (305). The abutment (306) is sleeved in the inner cavity of the guide groove (303), and the two ends of the abutment (306) extend to the inner cavity of the positioning groove (307). The positioning groove (307) is symmetrically opened inside the sofa base (1).

4. A sofa with an adjustable backrest angle according to claim 3, characterized in that, The outer wall of the abutment (306) matches the inner cavity of the guide groove (303) and the positioning groove (307).

5. A sofa with an adjustable backrest angle according to claim 3, characterized in that, The inner cavity of the rotating sleeve (304) is formed with a threaded groove that matches the thread on the outer wall of the lead screw (305).

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