CN102894711B - Four-side adjustable convertible sofa - Google Patents

Abstract

The invention relates to the field of furniture, which is a four-sided adjustable deformed sofa, which includes a base, a sofa seat, a right armrest, a left armrest and a backrest, and combines a sliding positioning tube, a supporting positioning tube and a base into a swing rocker mechanism, and use this mechanism as a mechanism for the support and angle adjustment of the sofa seat, backrest and armrest, and use multiple rotating pairs to complete the independent adjustment of the angle and height of the sofa seat, backrest or one or both side armrests of the sofa, so that the sofa It can be adjusted arbitrarily within a certain range and fixed at a certain position, so that the sofa can adapt to the rest needs of different users in various postures and can effectively support the human body, protect the human spine, and meet the user's enjoyment needs to the greatest extent. And it can play a certain protective effect on children playing on the sofa; in addition, the present invention has the advantages that the motion pair is low, the contact between parts is surface contact, the components are simple in structure, easy to process, and reliable in structural movement.

Description

A deformed sofa that can be adjusted in four sides

technical field

The invention belongs to the technical field of furniture, and relates to a sofa whose angles of a sofa seat, a backrest and armrests on both sides can be adjusted through a mechanical structure, so that the use function of the sofa is more comfortable.

Background technique

With the development of society and the improvement of people's living standards, sofas have entered almost every family in the city as a relatively comfortable piece of furniture. The current sofa has made great progress in style, material and function, and its adaptability is also stronger. Moreover, sofa designers are still working hard to continue to develop new sofa varieties to adapt to the needs of different consumer groups.

As far as the sofas currently available in the market are concerned, most single sofas and some double or three-seater sofas cannot be deformed, and the backrests of some double or three-seat sofas can be adjusted so that they can be folded and used as a sleeping berth. . Among the existing immutable and changeable sofas, the former has a single function and is limited to sitting postures; the latter is more flexible and can be used in two postures of sitting or lying. But most variable sofas are also limited to the use of two postures, and cannot adapt to the use of other postures. For example, when we want to rest on the sofa in a side-lying or half-lying position, the current sofa cannot provide more comfortable functions.

As far as sofa seats are concerned, surveys have shown that many sofa users have suggested that when users lie on the sofa watching TV, they hope to have a feeling of being surrounded by the sofa. Secondly, when the child at home is playing on the sofa, the parents also hope that the sofa can protect the child from being thrown to the ground when jumping. Therefore, if the front end of the sofa seat can be raised to a certain angle, the person lying on the side can automatically lean against the back of the sofa, and the person lying on the side can automatically tilt up the line of sight, which is convenient for watching TV and can make people more comfortable. For children playing on the sofa, when jumping on the sofa, they will automatically lean against the back of the sofa, so that they are not easy to fall forward, and they can be blocked by the back of the sofa backward, so as to avoid accidentally falling off the sofa. However, the sofa seat of most sofa products cannot be lifted and adjusted at present.

Contents of the invention

The purpose of the present invention is to overcome the above disadvantages and provide a deformed sofa that can be adjusted in four directions. The sofa seat, backrest or armrests on one or both sides of the sofa can be independently adjusted arbitrarily, so that the shape of the sofa, sofa seat, backrest and The angle and height of the armrests can be changed in various forms, so that the sofa can adapt to the user's resting needs in various postures and can effectively support the person's body, protect the person's spine, and meet the user's enjoyment needs to the greatest extent; in addition, It can play a certain protective role for children playing on the sofa.

In order to achieve the above object, the present invention adopts the following technical solutions.

A deformed sofa that can be adjusted on all sides, including a base, a sofa seat, a right armrest, a backrest and a left armrest, and is characterized in that the base includes a base beam, supporting feet, left supporting columns, right supporting columns, rear supporting feet and rear The support column, the base beam and the support feet form the ground structure of the sofa, the left and right support columns in the inverted L-shaped structure are fixed on the left and right sides of the base beam facing upward, and the rear support column of the base beam The rear support feet are fixed in the middle, and the longitudinal rear support columns are fixed at the rear of the rear support feet facing upward; the left and right ends of the base beam and the front and rear ends of the rear support feet, the left and right support columns The outer end of the top and the top two ends of the rear support column are the connection structure ends;

The sofa seat is fixedly arranged on the sofa seat support shaft and the sofa seat connecting plate connected in a cross shape, and the rear end of the sofa seat support shaft is hinged to one side of the top of the rear support column through the third rotating pin of the sofa seat to form a Rotation pair connection, the front end of the sofa seat support shaft is hinged with the upper end of the sofa seat sliding positioning pipe through the sofa seat first rotating pin to form a rotating pair connection, and a row of circular rings is arranged in the length direction outside the sofa seat sliding positioning pipe. hole, the lower end of the sofa seat sliding positioning tube is sleeved in a sofa seat supporting positioning tube, a positioning hole boss is arranged on the outer upper part of the sofa seat supporting positioning tube, and a sofa seat positioning Screw, the sofa seat sliding positioning tube and the sofa seat supporting positioning tube can be selectively locked with the sofa seat positioning screw through the round hole and the positioning hole; the lower end of the sofa seat supporting positioning tube passes through the second seat of the sofa seat The rotating pin is hinged with the front end of the rear supporting leg to form a rotating joint connection, and the two sides of the lower end of the sofa seat can rest on the inside of the top of the left supporting column and the right supporting column;

The backrest is fixedly arranged on a carrier composed of a backrest support rod and a backrest connecting plate, and the lower end of the backrest support rod is hinged to the other side of the top of the rear support column through the third rotation pin of the backrest to form a rotary joint connection. The upper end of the backrest support rod is hinged with the upper end of the backrest sliding positioning pipe through the first rotating pin of the backrest to form a rotating pair connection, and a row of round holes is provided in the length direction outside the backrest sliding positioning pipe, and the lower end of the backrest sliding positioning pipe Sleeved in a backrest support positioning tube, a positioning hole boss is provided on the outer upper part of the backrest support positioning tube, and a backrest positioning screw is connected in the positioning hole boss, and the backrest sliding positioning tube and the backrest support positioning tube pass through The round hole and the positioning hole can be selectively locked with the backrest positioning screw; the lower end of the backrest support positioning pipe is hinged with the rear end of the rear support leg through the second rotation pin of the backrest to form a rotary pair connection;

The right handrail is fixedly arranged on the carrier composed of the right handrail support rod and the right handrail connecting plate, and the lower end of the right handrail support rod is hinged with the outer side of the top of the right support column through the third rotation pin of the right handrail to form a rotation pair connection , the upper end of the right armrest support rod is hinged with the upper end of the right armrest sliding positioning tube through the first rotating pin of the right armrest to form a rotary joint connection, and a row of round holes is provided in the length direction outside the right armrest sliding positioning tube, so The lower end of the right armrest sliding positioning tube is sleeved in a right armrest supporting positioning tube, a positioning hole boss is arranged on the outer upper part of the right handrail supporting positioning tube, and a right handrail positioning screw is connected in the positioning hole boss, so The sliding positioning tube of the right handrail and the supporting positioning tube of the right handrail can be selectively locked with the positioning screw of the right handrail through the round hole and the positioning hole; the lower end of the supporting positioning tube of the right handrail is connected to the The right end of the base beam is hinged to form a rotary pair connection;

The left handrail is fixedly arranged on the carrier composed of the left handrail support rod and the left handrail connecting plate, and the lower end of the left handrail support rod is hinged with the outer side of the top of the left support column through the third rotation pin of the left handrail to form a rotation pair connection , the upper end of the left armrest support rod is hinged with the upper end of the left armrest sliding positioning tube through the first rotating pin of the left armrest to form a rotary joint connection, and a row of round holes is provided in the length direction outside the left armrest sliding positioning tube, so The lower end of the left armrest sliding positioning tube is sleeved in a left armrest supporting positioning tube, and a positioning hole boss is arranged on the outer upper part of the left armrest supporting positioning tube, and a left handrail positioning screw is connected in the positioning hole boss. The sliding positioning tube of the left handrail and the supporting positioning tube of the left handrail can be selectively locked with the positioning screw of the left handrail through the round hole and the positioning hole; the lower end of the supporting positioning tube of the left handrail is connected to the The left end of the base beam is hinged to form a rotary pair connection.

Further, the outer ends of the supporting feet fixedly connected with the lower beam of the underframe are provided with roller devices.

Further, the roller device is provided with a braking structure.

Further, each of the sliding positioning tubes and supporting positioning tubes is a structural member with a tube wall thickness equal to or greater than 5 mm.

Further, the diameters of the positioning holes and the rows of circular holes are 10 mm.

Further, the aperture of each positioning hole is 10mm, and the inner wall of each positioning hole is tapped with thread, and the outer wall of each positioning screw is tapped with thread, and each positioning screw and each positioning hole pass through a threaded structure. connected, the diameter of each row of round holes is equal to or greater than 10mm.

Further, an elastic connecting piece is provided on the side between the backrest and the right armrest and between the backrest and the left armrest, and the elastic connecting piece is a spring or a rubber band structural member.

Further, the sofa seat 2 is a seat surface wide for two or three people.

Further, the third turning pin of the left armrest at the top outer end of the left support column and the third turning pin of the right armrest at the top outer end of the right support column are provided with a horizontal state locking structure.

The positive effects of a deformed sofa that can be adjusted on all sides of the present invention are:

(1) The angles of the sofa seat, backrest, left armrest or right armrest of the present invention can be independently adjusted, so that the angles and heights of the four sides of the sofa can be adjusted arbitrarily within a certain range and fixed at a certain position, so that the sofa can adapt to The user needs to rest in various postures and can effectively support the human body, protect the human spine, and meet the user's enjoyment needs to the greatest extent; in addition, it can also play a certain protective role for children playing on the sofa.

(2) The present invention combines the sliding positioning tube, the supporting positioning tube and the base into a swinging rocker mechanism, and uses this mechanism as a mechanism for supporting and adjusting the angle of the sofa seat, backrest, left or right armrest, and utilizes multiple The four rotating pairs are connected to complete the adjustment of the angle and height of the four sides of the sofa. This type of structure has the advantages of low-level motion pairs and surface contact between parts. The components are simple in structure, easy to process, and reliable in structural movement.

(3) The present invention can control the adjustment of the four sides of the sofa by combining four sets of swinging block mechanisms in a reasonable layout. The layout and combination of this structure is simple and reasonable, which is one of the core contents of the present invention.

(4) After adding the roller device, it can provide a fixed or conveniently movable deformed sofa that can be adjusted in all directions, and a novel sofa style has been added to the sofa products, which can better meet the needs of the society.

Description of drawings

Fig. 1 is a structural schematic diagram of a deformed sofa that can be adjusted in four sides according to the present invention.

Fig. 2 is a structural schematic diagram of a four-sided adjustable deformable sofa support and positioning mechanism of the present invention.

Fig. 3 is a structural diagram of a four-side adjustable deformed sofa seat of the present invention after adjustment.

Fig. 4 is a structural diagram of a four-sided adjustable deformed sofa of the present invention after four-sided adjustment.

The labels in the figure are:

1, base; 101, base beam; 102, support foot; 103, left support column;

104, right support column; 105, rear support foot; 106, rear support column;

2. Sofa seat; 201. Sofa seat support shaft; 202. Sofa seat connecting plate; 203. The first rotating pin of sofa seat;

204, the sliding positioning tube of the sofa seat; 205, the supporting positioning tube of the sofa seat; 206, the positioning screw of the sofa seat;

207, the second rotating pin of the sofa seat; 208, the third rotating pin of the sofa seat;

3. Right armrest; 301, right armrest support rod; 302, right armrest connecting plate; 303, first rotating pin of right armrest;

304, right armrest slide positioning tube; 305, right armrest support positioning tube; 306, right armrest positioning screw;

307, the second turning pin of the right armrest; 308, the third turning pin of the right armrest;

4. Backrest; 401, backrest support rod; 402, backrest connecting plate; 403, first rotating pin of backrest;

404, backrest slide positioning tube; 405, backrest support positioning tube; 406, backrest positioning screw;

407, the second rotating pin of the backrest; 408, the third rotating pin of the backrest;

5. Left armrest; 501, left armrest support rod; 502, left armrest connecting plate; 503, first rotation pin of left armrest;

504, left armrest sliding positioning tube; 505, left armrest support positioning tube; 506, left armrest positioning screw;

507, the second turning pin of the left handrail; 508, the third turning pin of the left handrail.

Detailed ways

A specific embodiment of a four-sided adjustable deformed sofa of the present invention is given below in conjunction with the accompanying drawings, but the implementation of the present invention is not limited to the following embodiments.

See Figures 1 and 2. A deformable sofa that can be adjusted in four sides comprises a base 1 , a sofa seat 2 , a right armrest 3 , a backrest 4 and a left armrest 5 . The structural members of the sofa seat 2, right armrest 3, backrest 4 and left armrest 5 involved in the present invention can be manufactured by prior art or adopt existing parts. The innovative part of the present invention mainly lies in the connecting structure and the swinging rocker mechanism shown in FIG. 2 .

The base 1 includes a base beam 101, support feet 102, left support columns 103, right support columns 104, rear support feet 105, and rear support columns 106, which can be made of wood or rigid aluminum alloy pipes with better strength and lighter weight. Material manufacturing. The base beam 101 and the supporting feet 102 form the grounding structure of the sofa (during implementation, a roller device can be arranged at the outer ends of the four supporting feet 103, and the roller device used should be provided with a braking structure to facilitate the movement of the sofa, braking and handling). The left and right support columns 103 and right support columns 104 of the inverted L-shaped structure are affixed to the upper left and right sides of the base crossbeam 101, and the rear support feet 105 are affixed in the middle of the base crossbeam 101 towards the back. 105 is fixedly connected to the longitudinal rear support column 106 at the rear portion facing upward. The left and right ends of the base crossbeam 101, the front and rear ends of the rear support foot 105, the top outer ends of the left support column 103 and the right support column 104, and the top two ends of the rear support column 106 are connection structure ends; The connection of the pin structure.

The sofa seat 2 is fixedly arranged on the sofa seat support shaft 201 and the sofa seat connecting plate 202 connected in a cross shape (see FIG. 2 ), and the rear end of the sofa seat support shaft 201 is connected to the rear end of the sofa seat through the third rotating pin 208 of the sofa seat. One side of the top of the support column 106 is hinged to form a rotary pair connection; the front end of the sofa seat support shaft 201 is hinged to the upper end of the sofa seat sliding positioning pipe 204 through the first rotating pin 203 of the sofa seat to form a rotary pair connection; A row of circular holes is provided in the length direction of the outside of the sofa seat sliding positioning tube 204, and the lower end of the sofa seat sliding positioning tube 204 is sleeved in a sofa seat supporting positioning tube 205, and is arranged on the outer upper part of the sofa seat supporting positioning tube 205. A positioning hole boss, a sofa seat positioning screw 206 is connected in the positioning hole boss. The sofa seat sliding positioning tube 204 and the sofa seat supporting positioning tube 205 can be selectively locked with the sofa seat positioning screw 206 through the round hole and the positioning hole. The lower end of the sofa seat support positioning pipe 205 is hinged with the front end of the rear support leg 105 through the second pivot pin 207 of the sofa seat to form a rotary joint connection; that is, the height and angle of the sofa seat 2 are adjusted through three rotary joints. The connection structure is complete (see Figures 3 and 4). Described sofa seat 2 can be made into double or three people's wide seat surface. From the perspective of the use effect or the occupied area, the effect of using a double-width seat will be better. The two sides of the lower end of the sofa seat 2 can rest on the inside of the top of the left support column 103 and the right support column 104 under normal conditions (see FIG. 1 ).

Fix the backrest 4 on the carrier composed of the backrest support rod 401 and the backrest connecting plate 402: first fix at least two backrest connecting plates 402 on the back of the backrest 4, and then fix the backrest support on the backrest connecting plate 402 The rod 401 makes the back support rod 401 and the back connecting plate 402 integrated with the back 4 as a whole. Then, the lower end of the backrest support rod 401 is hinged to the other side of the top of the rear support column 106 through the third rotation pin 408 of the backrest to form a rotation pair connection; It is hinged with the upper end of the backrest sliding positioning tube 404 to form a rotary joint connection; a row of round holes is provided in the length direction outside the backrest sliding positioning tube 404, and the lower end of the backrest sliding positioning tube 404 is sleeved on a backrest support positioning In the tube 405, a positioning hole boss is arranged on the outer upper part of the backrest support positioning tube 405, and a backrest positioning screw 406 is connected in the positioning hole boss. The backrest sliding positioning tube 404 and the backrest supporting positioning tube 405 can be selectively locked with the backrest positioning screw 406 through the round hole and the positioning hole. The lower end of the backrest support positioning tube 405 is hinged with the rear end of the rear support leg 105 through the second backrest pivot pin 407 to form a swivel pair connection; that is, the adjustment of the height and angle of the backrest 4 is also through three swivel pair connection structures Completed.

The right armrest 3 is fixedly arranged on the carrier formed by the right armrest support rod 301 and the right armrest connecting plate 302: first at least two right armrest connecting plates 302 are fixed on the back of the right armrest 3, and then, on the right armrest connecting plate 302 Fix the right armrest support rod 301 on the top, so that the right armrest support rod 301 and the right armrest connecting plate 302 are combined with the backrest 4 as a whole. Then, the lower end of the right armrest support rod 301 is hinged to the outside of the top of the right support column 104 through the third rotating pin 308 of the right armrest to form a rotary pair connection; the upper end of the right armrest support rod 301 is passed through the first right armrest The rotating pin 303 is hinged with the upper end of the right armrest sliding positioning tube 304 to form a rotary pair connection; a row of round holes is provided in the length direction outside the right armrest sliding positioning tube 304, and the lower end of the right armrest sliding positioning tube 304 is socketed In a right handrail support positioning tube 305, a positioning hole boss is provided on the outer upper part of the right handrail support positioning tube 305, and a right handrail positioning screw 306 is connected in the positioning hole boss. The right armrest sliding positioning tube 304 and the right armrest supporting positioning tube 305 can be selectively locked with the right armrest positioning screw 306 through the round hole and the positioning hole. The lower end of the right armrest support positioning pipe 305 is hinged with the right end of the base crossbeam 101 through the second rotating pin 307 of the right armrest, forming a rotation pair connection; that is, the adjustment of the height and angle of the right handrail 3 is also connected by three rotation pairs The structure is complete.

(See FIG. 3 ) The arrangement and connection structure of the left armrest 5 can be performed with reference to the arrangement and connection structure of the right armrest 3 . The left armrest 5 is fixedly arranged on the carrier formed by the left armrest support rod 501 and the left armrest connecting plate 502, and then the lower end of the left armrest support rod 501 is passed through the third rotation pin 508 of the left armrest and the left support column The outer side of 103 tops is hinged to form a rotary pair connection; the upper end of the left armrest support rod 501 is hinged to the upper end of the left armrest sliding positioning tube 504 through the first rotation pin 503 of the left armrest to form a rotary pair connection; A row of round holes is provided in the length direction of the outside of the sliding positioning tube 504. The lower end of the left armrest sliding positioning tube 504 is sleeved in a left armrest supporting positioning tube 505, and a left armrest supporting positioning tube 505 is provided with a The boss of the positioning hole is connected with a left armrest positioning screw 506 in the boss of the positioning hole. The left armrest sliding positioning tube 504 and the left armrest supporting positioning tube 505 can be selectively locked with the left armrest positioning screw 506 through the round hole and the positioning hole. The lower end of the left armrest support positioning pipe 505 is hinged with the left end of the base crossbeam 101 through the second rotating pin 507 of the left armrest to form a rotation pair connection; that is, the adjustment of the height and angle of the left armrest 5 is also connected by three rotation pairs The structure is complete.

During implementation, it should be noted that the above-mentioned sliding positioning tubes and supporting positioning tubes adopt structural members with a tube wall thickness equal to or greater than 5mm. The joint gap between each sliding positioning tube and each supporting positioning tube should be less than or equal to 3mm, so as to avoid the main structural parts shaking greatly after the socketing, causing discomfort to people.

The diameters of the positioning holes and the rows of circular holes are 10mm. In implementation, the aperture of each positioning hole can be designed to be 10mm, and the aperture of each row of circular holes can be designed to be equal to or greater than 10mm; threads are set at the inner wall of each positioning hole, and the outer wall of each positioning screw is provided with a screw thread. Each positioning screw is connected to each positioning hole through a thread structure, and each positioning screw can be embedded in one of the rows of round holes through the positioning holes to play a position-limiting role.

(See Figure 4) During implementation, it should be noted that a horizontal state locking structure needs to be set on the third turning pin 508 of the left armrest at the top outer end of the left support column 103 and the third turning pin 308 of the right armrest at the top outer end of the right support column 104 , to ensure that when the right armrest 3 and the left armrest 5 of the sofa are in the horizontal position, the locking of the horizontal state is carried out, ensuring that the sofa of the present invention can be used as a simple single bed. the

If necessary, elastic connectors can be provided on the side between the backrest 4 and the right armrest 3 and the side between the backrest 4 and the left armrest 5 to undertake certain connection or protection functions. The elastic connector can be a spring or a rubber band structure.

When the four-sided adjustable deformed sofa of the present invention needs to be adjusted, the user can first unscrew the related positioning screw for a certain distance to make it out of the round hole, so that the related sliding positioning tube can be released from the restriction and can be placed in the related supporting positioning tube. Arbitrary movement, when the sofa seat 2 or backrest 4 or right armrest 3 or left armrest 5 is adjusted to the required position through the connection of the rotating pair, then use the related positioning screw to lock the related sliding positioning tube through the related positioning hole and round hole For the connection position with the related support positioning tube, just tighten the related positioning screws (see Figure 4).

When the sofa seat 2 of the sofa is in the horizontal state, and when the backrest 4 and the right armrest 3 and the left armrest 5 are in the vertical state, the present invention can meet the requirements for use of the general sitting posture.

When the right armrest 3 and the left armrest 5 of the sofa (through the horizontal state locking structure) are in the horizontal position, the present invention can be used as a simple single bed.

When the four faces of the sofa (sofa seat 2, backrest 4, right armrest 3 and left armrest 5) were in the horizontal position, the present invention can be used as a larger bed.

When the right armrest 3 and the left armrest 5 of the sofa are at other arbitrary angles, the present invention can meet the use requirements of the user lying on his side.

When the backrest 4 of the sofa is at other arbitrary angles, the present invention can meet the use requirements of the user in half-lying positions.

When the front end of the sofa seat 2 is at an upward angle, the present invention can meet the needs of users lying on their side to watch TV and other postures, and can play a certain protective effect on children playing on the sofa.

In addition, the user can adjust the four surfaces (sofa seat 2, backrest 4, right armrest 3 and left armrest 5) of the present invention to the most comfortable angle for personal use. The adjustment of the angle and height of the main structural parts of the sofa is completed, the operation is smart and convenient, and the structural movement is reliable, so the whole adjustment process is very easy, simple and convenient.

Claims (1)

1. A deformed sofa that can be adjusted on all sides, comprising a base (1), a sofa seat (2), a right armrest (3), a backrest (4) and a left armrest (5), characterized in that the base (1) Including base beam (101), support feet (102), left support column (103), right support column (104), rear support foot (105) and rear support column (106), the base beam (101) and support The feet (102) form the landing structure of the sofa, and the left and right support columns (103) and the right support columns (104) of the inverted L-shaped structure are fixed vertically on the left and right sides of the base beam (101), and on the base beam (101). 101) is fixed to the rear supporting foot (105) in the middle of the back, and the longitudinal rear supporting column (106) is fixed to the rear of the rear supporting foot (105) facing upwards; the left and right ends of the base beam (101) And the front and rear ends of the rear support foot (105), the top outer ends of the left support column (103) and the right support column (104), and the top two ends of the rear support column (106) are connection structure ends; The sofa seat (2) is fixedly arranged on the sofa seat supporting shaft (201) and the sofa seat connecting plate (202) connected in a cross shape, and the rear end of the sofa seat supporting shaft (201) is rotated by the sofa seat for the third time. The pin (208) is hinged to one side of the top of the rear support column (106) to form a rotary pair connection, and the front end of the sofa seat support shaft (201) is connected to the sofa seat sliding positioning tube ( The upper end of 204) is hinged to form a rotary joint connection. A row of round holes is provided in the length direction outside the sofa seat sliding positioning tube (204), and the lower end of the sofa seat sliding positioning tube (204) is sleeved on a sofa seat In the support positioning tube (205), a positioning hole boss is provided on the outer upper part of the sofa seat support positioning tube (205), and a sofa seat positioning screw (206) is connected in the positioning hole boss, and the sofa seat slides The positioning tube (204) and the sofa seat support positioning tube (205) can be selectively locked with the sofa seat positioning screw (206) through the round hole and the positioning hole; the lower end of the sofa seat support positioning tube (205) The second rotating pin (207) of the sofa seat is hinged with the front end of the rear supporting leg (105) to form a rotating joint connection, and the two sides of the lower end of the sofa seat (2) can rest on the left supporting column (103) and the right The inner side of the top of the support column (104); The backrest (4) is fixedly arranged on the carrier composed of the backrest support rod (401) and the backrest connecting plate (402), and the lower end of the backrest support rod (401) is connected with the rear support by the third backrest rotation pin (408) The other side of the top of the column (106) is hinged to form a rotary joint connection, and the upper end of the backrest support rod (401) is hinged to the upper end of the backrest sliding positioning tube (404) through the first backrest pivot pin (403) to form a rotary joint connection, a row of circular holes is provided in the length direction outside the backrest sliding positioning tube (404), and the lower end of the backrest sliding positioning tube (404) is sleeved in a backrest supporting positioning tube (405), positioned on the backrest supporting positioning The outer upper part of the tube (405) is provided with a positioning hole boss, and the backrest positioning screw (406) is connected in the positioning hole boss, and the backrest sliding positioning tube (404) and the backrest support positioning tube (405) pass through the The round hole and the positioning hole can be selectively locked with the backrest positioning screw (406); the lower end of the backrest support positioning tube (405) passes through the backrest second rotation pin (407) and the back of the rear support leg (105). The ends are hinged to form a revolving pair connection; The right armrest (3) is fixedly arranged on the carrier composed of the right armrest support rod (301) and the right armrest connecting plate (302), and the lower end of the right armrest support rod (301) passes through the third rotation pin of the right armrest ( 308) is hinged to the outer side of the top of the right support column (104) to form a rotary joint connection, the upper end of the right armrest support rod (301) is connected to the right armrest sliding positioning tube (304) through the first rotation pin (303) of the right armrest The upper end is hinged to form a rotary joint connection. A row of round holes is provided in the length direction outside the right armrest sliding positioning tube (304), and the lower end of the right armrest sliding positioning tube (304) is sleeved on a right armrest supporting positioning tube. (305), a positioning hole boss is provided on the outer upper part of the right armrest support positioning tube (305), and a right handrail positioning screw (306) is connected in the positioning hole boss, and the right handrail sliding positioning tube ( 304) is selectively locked with the right armrest support positioning tube (305) through the round hole and the positioning hole with the right armrest positioning screw (306); the lower end of the right armrest support positioning tube (305) passes through the right armrest The second rotating pin (307) is hinged with the right end of the base beam (101) to form a rotating pair connection; The left armrest (5) is fixedly arranged on the carrier composed of the left armrest support rod (501) and the left armrest connecting plate (502), and the lower end of the left armrest support rod (501) passes through the third rotation pin of the left armrest ( 508) is hinged with the outer side of the top of the left support column (103) to form a rotary joint connection, the upper end of the left armrest support rod (501) is connected to the left armrest sliding positioning tube (504) through the first rotation pin (503) of the left armrest The upper end is hinged to form a rotating joint connection. A row of round holes is provided in the length direction outside the left armrest sliding positioning tube (504). The lower end of the left armrest sliding positioning tube (504) is sleeved on a left armrest supporting positioning tube. (505), a positioning hole boss is provided on the outer upper part of the left armrest support positioning tube (505), and a left armrest positioning screw (506) is connected in the positioning hole boss, and the left armrest sliding positioning tube ( 504) and the left armrest support positioning tube (505) can be selectively locked with the left armrest positioning screw (506) through the round hole and the positioning hole; the lower end of the left armrest support positioning tube (505) passes through the left armrest The second rotating pin (507) is hinged to the left end of the base beam (101), forming a rotating joint connection. 2. The four-sided adjustable deformed sofa according to claim 1, characterized in that, the outer end of the support leg (102) fixed to the base beam (101) is provided with a roller device. 3. The four-sided adjustable deformable sofa according to claim 2, wherein the roller device is provided with a braking structure. 4. A four-sided adjustable deformed sofa according to claim 1 or 2, characterized in that, each of the sliding positioning tubes and supporting positioning tubes is a structural member with a tube wall thickness equal to or greater than 5 mm. 5. A four-sided adjustable deformed sofa according to claim 1 or 2, wherein the apertures of each of the positioning holes and the rows of circular holes are 10mm. 6. A four-sided adjustable deformed sofa according to claim 1 or 2, characterized in that the aperture of each positioning hole is 10mm, and threads are tapped on the inner walls of each positioning hole, and each positioning hole Threads are tapped on the outer wall of the screw, the positioning screws are connected to the positioning holes through a thread structure, and the diameter of each row of round holes is equal to or greater than 10 mm. 7. A four-sided adjustable deformed sofa according to claim 1 or 2, characterized in that, the side between the backrest (4) and the right armrest (3) and the side between the backrest (4) and the left armrest (3) Elastic connectors are provided on the sides between the armrests (5), and the elastic connectors are spring or rubber band structural members. 8. A four-sided adjustable deformable sofa according to claim 1 or 2, characterized in that the sofa seat (2) is a seat surface wide for two or three people. 9. A four-sided adjustable deformed sofa according to claim 1 or 2, characterized in that the third turning pin (508) of the left armrest at the top outer end of the left support column (103) and the right support column (104 ) The third turning pin (308) of the right armrest at the outer end of the top is provided with a horizontal state locking structure.