CN217510152U - Back-pushing bed frame - Google Patents

Abstract

The utility model provides a back-pushing bed frame, which comprises a fixed frame and a rotating frame, wherein one end of the rotating frame is rotationally connected with the fixed frame, and the fixed frame is provided with a driving component for driving the rotating frame to rotate; fixed frame includes two L type connecting pieces or the U type connecting piece that open side up that are located its both sides, and revolving frame includes two square pipes that are located its both sides, and the one end of two square pipes is normal running fit respectively in the right angle region that corresponds L type connecting piece or in the recess of U type connecting piece, and square pipe lateral wall with leave between L type connecting piece or the U type connecting piece lateral wall and prevent pressing from both sides the hand clearance. The utility model provides a back-pushing bed frame, which has simple structure, convenient adjustment and small width of the frame after being stored; and effectively avoid the condition that the user pinches in the use process.

Description

Back-pushing bed frame

Technical Field

The utility model belongs to the technical field of shower room technique and specifically relates to a back of body pushes away bedstead.

Background

Beds are essential furniture for people to sleep, and conventional standard beds are usually of fixed size, and are more commonly 1.6 m and 1.8 m in size. In order to improve the comfort and the application of the bed, the bed not only can meet the requirements of lying and sleeping, but also can meet the requirements of lying postures and medical care at various angles. In the prior art, if a user needs to make the fixed bed have the above adjusting function, the fixed bed can be realized only by replacing a new special lifting bed, which causes resource waste and correspondingly increases the cost.

Although some back pushing structures which can be directly applied to the existing fixed bed are also provided along with the technical progress and are used for adjusting the back height of a user, the back pushing structures generally comprise a fixed frame and a rotating frame, in the structure, frames on two sides of the rotating frame and frames on two sides of the fixed frame are both square tube structures at present, two square tubes are matched with each other in a scissor fork type, no anti-pinch design is arranged between the rotating frame and the fixed frame, and when the rotating frame and the fixed frame are folded, the situation of pinching is easy to occur; and the width of the frame of the whole structure is too large after the whole structure is completely folded.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem, in order to overcome the defect among the prior art, provide a back of body and push away bedstead, simple structure, it is convenient to adjust, and it is little to accomodate back frame width to effectively avoid the condition that takes place the tong in the user's use.

In order to solve the problems, the utility model provides a back-pushing bed frame, which comprises a fixed frame and a rotating frame, wherein one end of the rotating frame is rotatably connected with the fixed frame, the fixed frame is provided with a driving component for driving the rotating frame to rotate, the fixed frame comprises two L-shaped connecting pieces or U-shaped connecting pieces with upward openings, which are positioned at two sides of the fixed frame, the rotating frame comprises two square tubes positioned at two sides of the rotating frame, and one end of each of the two square tubes is respectively rotatably connected in a right-angle area of the L-shaped connecting piece or a groove of the U-shaped connecting piece; and an anti-pinch gap is left between the side wall of the square pipe and the inner side wall of the L-shaped connecting piece or the inner side wall of the U-shaped connecting piece.

Compared with the prior art, the back-pushing bed frame of the utility model has the advantages that:

the back pushing frame structure of the utility model only comprises a fixed frame, a rotating frame and a driving structure for driving the rotating frame to rotate and lift, the whole structure is simple, and the operation is convenient; the two sides of the fixed frame positioned below are provided with L-shaped connecting pieces or U-shaped connecting pieces with upward openings, the two sides of the rotating frame positioned above are provided with square tubes, and a hand clamping preventing gap is also arranged between the square tubes and the side walls of the L-shaped connecting pieces or the inner side walls of the U-shaped connecting pieces, so that the danger of hand clamping of a user in the use process is effectively avoided, and the safety performance is improved; in addition, the corresponding normal running fit of two square tubular structures is in the right angle region of L type connecting piece or the cooperation is in the inside groove of U type connecting piece, and the frame size after whole back of the body push bench accomodates obtains further reducing when accomodating to can reduce the weight of whole device, reduce the packing size.

Furthermore, the fixed frame further comprises a first cross rod and a second cross rod, the first cross rod and the second cross rod are respectively connected between the front end and the rear end of the L-shaped connecting piece or the U-shaped connecting piece, one end of the driving assembly is connected to the first cross rod, and the other end of the driving assembly is connected with the rotating frame. In the structure, the corresponding cross rod structure realizes the assembly of the whole frame structure, and is convenient for each part to be separately packaged, thereby reducing the overall dimension of the single part.

Still further, revolving frame still includes the third horizontal pole, the both ends of third horizontal pole are connected respectively two the other end of square pipe, drive assembly keeps away from the one end of first horizontal pole is connected on the third horizontal pole. In the structure, the two square pipes are connected through the third cross rod, the structural stability of the rotating frame is guaranteed, and in addition, the other end of the driving assembly is connected to the third cross rod, and the stability of the driving structure is guaranteed.

Preferably, the driving assembly comprises an electric push rod, and two ends of the electric push rod are respectively hinged to the first cross rod and the third cross rod. Among the above-mentioned structure, the drive assembly preferred is electric putter, simple structure, and the drive is stable, convenient operation.

As an improvement, the third cross rod is rotatably connected with an articulated shaft parallel to the third cross rod, one end of the electric push rod is articulated on the articulated shaft, the articulated shaft is also provided with an auxiliary ejector rod, a supporting vertical rod is connected between the first cross rod and the second cross rod, the auxiliary ejector rod horizontally clings to the upper surface of the supporting vertical rod in an initial state, and one end of the auxiliary ejector rod, which is far away from the articulated shaft, extends towards the position of the first cross rod; and at the initial stage of the lifting motion of the rotating frame, the auxiliary ejector rod rotates towards the direction far away from the first transverse rod, and the end part of the auxiliary ejector rod far away from the articulated shaft is in sliding butt joint with the upper end surface of the supporting vertical rod. In the above-mentioned improvement structure, increased an auxiliary push rod and combined electric putter and realized automation, nimble drive to the revolving frame pivoted.

And the length of the first cross rod, the length of the second cross rod and the length of the third cross rod are adjustable. Among the above-mentioned improvement structure, the length of each cross bar is adjustable, can make back of the body manipulator frame can be applicable to the fixed bed of different width through the length of adjusting the cross bar, improves the commonality.

And the first cross rod, the second cross rod and the third cross rod respectively comprise first connecting pipes, the two ends of each first connecting pipe are respectively nested with a second connecting pipe in a sliding mode, and the other ends of the second connecting pipes are respectively correspondingly connected to the outer walls of the L-shaped connecting pieces or the U-shaped connecting pieces. In the improved structure, the length of each cross rod is adjusted by the axial sliding between the mutually nested connecting pipes, the structure is simple, and the adjustment is convenient.

The improved structure is characterized in that the first connecting pipe is an outer square pipe with the size larger than that of the second connecting pipe, the second connecting pipe is an inner square pipe matched with an inner hole of the outer square pipe, a plurality of threaded holes extending along the length direction of the inner square pipe are formed in the outer wall of the inner square pipe, adjusting bolts penetrate through the two ends of the outer square pipe correspondingly, and the inner ends of the adjusting bolts can be assembled in any threaded hole. In the improved structure, the first connecting pipe and the second connecting pipe which are mutually nested are respectively an outer square pipe and an inner square pipe, and the square pipe can play a role of preventing rotation; in addition set up a plurality of screw holes on the inner tube, realize through adjusting bolt on the outer square pipe with the screw hole cooperation of different positions, can both carry out stable spacing when guaranteeing outer square pipe, interior square pipe adjustment to a plurality of different positions.

And the improved structure is characterized in that the rotating frame is provided with two square tubes, and a plurality of telescopic woven belts used for supporting a mattress and a human body are connected between the square tubes. In the improved structure, the telescopic woven belt has better comfort as a mattress and a supporting part of a human body, and has simpler structure, convenient installation and low cost.

Preferably, two side edges of the fixed frame are L-shaped connecting pieces, and one end of the square tube is rotatably connected to a vertical plate of the L-shaped connecting piece through a hinge shaft; square pipe with be connected with between the vertical board and be used for injecing prevent tong clearance's setting element. The improved structure is more convenient to install, and when the square tube is in a flat lying state, the square tube can be accommodated in the right-angle area of the L-shaped connecting piece, so that the space is saved, and the weight is light; in addition, the distance can be accurately limited through the positioning piece, and the hand clamping prevention function is realized.

Drawings

Fig. 1 is a schematic structural view of the back-pushing bed frame of the present invention.

Fig. 2 is an enlarged structural view at X in fig. 1.

Fig. 3 is a schematic structural view of the back pushing frame of the present invention adjusted to another width.

Fig. 4 is a schematic structural view of the back-pushing bed frame of the present invention after being equipped with the retractable webbing.

Fig. 5 is an exploded view of the connection structure of the middle square tube and the L-shaped connecting member of the present invention.

Description of reference numerals:

1. a fixed frame; 1.1, an L-shaped connecting piece; 1.1.1, vertical plates; 1.1.2, positioning the jack; 1.2, a first transverse post; 1.3, a second cross bar; 1.4, supporting a vertical rod; 2. a rotating frame; 2.1, square tubes; 2.1.1, assembling holes; 2.2, a third cross bar; 3. an electric push rod; 4. hinging shafts; 5. an auxiliary ejector rod; 6. a first connecting pipe; 7. a second connecting pipe; 8. adjusting the bolt; 9. a retractable webbing; 10. An L-shaped metal plate; 11. fastening a bolt; 12. a positioning member; 12.1, a connecting shaft; 12.2, positioning a shaft; 12.3, positioning and inserting the column; 13. a connecting screw; 14. and a limiting baffle.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it should be noted that the terms "front, back", "outer side wall", "upper surface", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, the terms "first" and "second" are used for convenience of description and distinction, and have no specific meaning.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Implementing one step:

as shown in fig. 1 and 2, the utility model provides a back-pushing bed frame, which is used for being placed at one end of the head part of the existing fixed bed; specifically, the bed comprises a fixed frame 1 and a rotating frame 2, wherein the fixed frame 1 is horizontally placed at the upper end close to the existing fixed bed board, the rotating frame 1 is positioned at the upper end of the fixed frame 1, one end of the rotating frame 2 is rotatably connected with one end of the fixed frame 1, and a driving assembly for driving the rotating frame 2 to rotate is correspondingly connected to the fixed frame 1; order about revolving frame 2 through drive assembly and rotate, realize the lifting of back, the user can go on leaning on the revolving frame 2 of slope to have a rest to realize the user under the condition of not changing original fixed bed, adjust the not appearance of lying of co-altitude, with the comfort level requirement that satisfies height.

More specifically, the fixed frame 1 comprises two L-shaped connecting pieces 1.1 with outward openings at two sides, in addition, the rotating frame 2 comprises two square pipes 2.1 at two sides, and one ends of the two square pipes 2.1 are respectively and rotatably matched in a right-angle area corresponding to the L-shaped connecting pieces 1.1, specifically, the right-angle area is an area formed between a vertical plate 1.1.1 and a horizontal plate of the L-shaped connecting piece 1.1; and in above-mentioned structure, leave between the vertical board 1.1.1 of the connecting piece 1.1 of square pipe 2.1 lateral wall and L type and prevent tong clearance, avoid the user to take place the condition of tong when adjusting swivel mount 2, more specifically, prevent tong clearance less than or equal to 5mm or be greater than 25mm in the above-mentioned structure, when not influencing the pivoted between square pipe 2.1 and the L type connecting piece 1.1, effectively avoid the user finger to stretch into in the clearance of two parts or stretch into and also can not take place the tong in the clearance, improve the security performance. In this embodiment, the preferred anti-pinch gap is a gap set to be greater than 25 mm.

As shown in fig. 2, in this embodiment, a positioning member 12 is connected between the square tube 2.1 and the vertical plate 1.1.1, so as to effectively realize the control of the anti-pinch gap through the positioning member 12, thereby facilitating the installation. More specifically, as shown in fig. 5, the positioning member 12 includes a connecting shaft 12.1, one end of the connecting shaft 12.1 is provided with a positioning shaft 12.2, and the diameter of the positioning shaft 12.2 is greater than that of the connecting shaft 12.1; the vertical plate 1.1.1 is provided with a positioning jack 1.1.2, one end of the positioning shaft 12.2 far away from the connecting shaft 12.1 is correspondingly provided with a section of positioning insertion column 12.3, and the other end of the square tube 2.1 connected with the L-shaped connecting piece 1.1 is provided with an assembling hole 2.1.1, when in installation, the positioning insertion column 12.3 on the connecting shaft 12.1 is firstly inserted and matched in the positioning jack 1.1.2, then the square tube 2.1 is assembled in the connecting shaft 12.1 through the assembling hole 2.1 until the side wall of the square tube 2.1 is abutted against the side wall of the positioning shaft 12.2, and finally the other side of the square tube 2.1 is fixedly connected with the connecting shaft 12.1 through a connecting screw 13.

In this embodiment, the L-shaped connecting member 1.11 is preferably an L-shaped angle steel, and a conventional standard member can be directly selected, so as to improve the processing efficiency. In addition, among the above-mentioned structure, the one end of square pipe 2.1 is rotated and is connected on the vertical board 1.1.1 of L type connecting piece 1.1, simple to operate to when lying the state, square pipe 2.1 can the holding save space in the right angle region of L type connecting piece 1.1.

As shown in fig. 1, in this embodiment, the fixed frame 1 includes, in addition to the two L-shaped connecting pieces 1.1, a first cross bar 1.2 and a second cross bar 1.3, and the first cross bar 1.2 and the second cross bar 1.3 are respectively connected between the front and rear ends of the two L-shaped connecting pieces 1.1, so that a rectangular frame is defined between the first cross bar 1.2, the second cross bar 1.3 and the two L-shaped connecting pieces 1.1; wherein, drive assembly's one end is connected on first horizontal pole 1.2, and the other end is connected with revolving frame 2.

Similarly, the rotating frame 2 in the above structure further includes a third cross bar 2.2 besides the structure of the two square tubes 2.1, two ends of the third cross bar 2.2 are respectively connected to the other ends of the two square tubes 2.1 to form a door-shaped frame, and in addition, one end of the driving assembly, which is far away from the first cross bar 1.2, is connected to the third cross bar 2.2, so that the stability of the driving structure is ensured.

In addition, the driving assembly in this embodiment includes an electric push rod 3, and both ends of the electric push rod 3 are respectively hinged to the first cross rod 1.2 and the third cross rod 2.2, and the rotating frame 2 is rotated up and down relative to the fixed frame 1 by the extension and retraction of the electric push rod 3, so as to adjust the backrest angle of the user. On the other hand, in the above structure, when the non-use state between the rotating frame 2 and the fixed frame 1 tends to be horizontal, the driving force direction is too gentle only by the driving of the electric push rod 3, so that the rotating frame 2 may be difficult to be lifted automatically, and the rotating frame 2 may need to be assisted by an upward acting force manually in the driving process, so that the automation degree of the back adjusting mechanism is not high.

Therefore, the structure is further improved in the embodiment, specifically, a U-shaped mounting frame is connected to the middle position of the outer wall of the third cross bar 2.2, a hinge shaft 4 parallel to the U-shaped mounting frame is rotatably connected between two side walls of the U-shaped mounting frame, in addition, a connecting plate is arranged on the hinge shaft 4, one end of the electric push rod 3 is hinged on the connecting plate, and an auxiliary push rod 5 is further arranged on the hinge shaft 4; in addition, a supporting vertical rod 1.4 is connected between the first cross rod 1.2 and the second cross rod 1.3, and the other end of the auxiliary ejector rod 5 is in sliding fit with the supporting vertical rod 1.4. In the structure, in an initial state, the electric push rod 3 is in a retraction state, the electric push rod 3, the auxiliary push rod 5 and the vertical support rod 1.4 are in positions (not shown in the figure) approximately parallel, wherein the auxiliary push rod 5 is attached to the upper end of the vertical support rod 1.4, and one end of the auxiliary push rod 5, which is far away from the hinge shaft 4, faces the position of the first cross rod 1.2; when the angle of the rotating frame 2 needs to be adjusted, the movable rod of the electric push rod 3 slowly extends outwards, the hinge shaft 4 rotates under the action of the thrust of the electric push rod 3, and then the auxiliary ejector rod 5 is driven to rotate around the hinge shaft 4 towards the direction away from the first cross rod 1.2, and the outer end face of the auxiliary ejector rod 5 always slides and abuts against the upper end of the vertical support rod 1.4 in the rotating process, the auxiliary ejector rod 5 drives the rotating frame 2 to be slowly lifted in the process that the auxiliary ejector rod 5 slowly moves towards the direction away from the first cross rod 1.2, when the angle between the rotating frame 2 and the fixed frame 1 reaches the set angle, and the electric push rod 3 continuously extends out, the rotating frame 2 can be smoothly driven to rotate around the joint with the fixed frame 1, so that the process of adjusting the height of the rotating frame 2 does not need manual matching lifting completely, and automatic adjustment is realized, the regulation efficiency is improved.

In addition, in the above-mentioned auxiliary revolving frame 2 pivoted structure, in order to prevent the auxiliary push rod 5 from rotating towards the direction far away from the support montant 1.4 under the effect of electric putter 3, influence the normal lifting motion of revolving frame 2, in this embodiment, still be equipped with a limit baffle 14 on the U-shaped mounting bracket, this limit baffle 14 is located articulated shaft 4 top, when making electric putter 3 drive auxiliary push rod 5 start rotating from the horizontal position of initial myopia, auxiliary push rod 5 can only down (anticlockwise) rotate, thereby play the effect of auxiliary revolving frame 2 lifting.

On the other hand, in this embodiment, the lengths of the first cross bar 1.2, the second cross bar 1.3 and the third cross bar 2.2 are all adjustable, so that the back stretcher can flexibly adjust the width according to bed types with different widths. Specifically, first horizontal pole 1.2, second horizontal pole 1.3 and third horizontal pole 2.2 all include first connecting pipe 6, and the both ends of first connecting pipe 6 are all slip nested has second connecting pipe 7, and the other end of each second connecting pipe 7 corresponds respectively to be connected on square pipe 2.1 outer wall or on L type connecting piece 1.1 outer wall. Preferably, the first connecting pipe 6 is an outer square pipe with a size larger than that of the second connecting pipe 7, the second connecting pipe 7 is an inner square pipe matched with an inner hole of the outer square pipe, the outer wall of the inner square pipe is provided with a plurality of threaded holes 7.1 extending along the length direction of the inner square pipe, adjusting bolts 8 correspondingly penetrate through two ends of the outer square pipe, the inner ends of the adjusting bolts 8 can be assembled in any threaded hole 7.1, when the width of the back push bed frame needs to be adjusted, the corresponding adjusting bolts 8 are firstly unscrewed, then the relative positions of the outer square pipe and the inner square pipe are adjusted, after the required size is adjusted, the adjusting bolts 8 are matched with the corresponding threaded holes 7.1 in the inner square pipe, and finally the adjusting bolts 8 are screwed down, so that the end parts of the adjusting bolts are matched in the threaded holes 7.1 in the corresponding positions.

On the other hand again, be connected with many scalable meshbelts 9 on the rotating frame 2 between being located two root canal pipe 2.1 for support mattress and human body when rotating frame 2 lifting, the elasticity that can manual adjustment scalable meshbelt 9 is compared in stiff backup pad structural connection simple, convenient, and is with low costs, and scalable meshbelt 9 has certain flexible supporting effect, has better comfort level when supporting human back.

In addition, as shown in fig. 3, the two ends of the supporting vertical bar 1.4 are respectively connected with L-shaped metal plates 10, the inner walls of the middle positions of the first transverse bar 1.2 and the second transverse bar 1.3 are respectively provided with a corresponding connecting screw hole, a fastening bolt 11 penetrates through each L-shaped connecting piece 1.1, when the supporting vertical bar 1.4 is connected with the first transverse bar 1.2 and the second transverse bar 1.3, firstly, the two L-shaped metal plates 10 are attached and assembled on the first transverse bar 1.2 and the second transverse bar 1.3, and then the fastening bolt 11 is screwed down, so that the end parts of the fastening bolt are matched in the corresponding connecting screw holes on the first transverse bar 1.2 and the second transverse bar 1.3, thereby the convenient assembly and disassembly of the supporting vertical bar 1.4 and the first transverse bar 1.2 and the second transverse bar 1.3 are realized, the packaging space is saved, and the assembly of a user is facilitated.

The second implementation:

the structure of the present embodiment is substantially the same as that of the first embodiment, and the only difference is that the L-shaped connector 1.1 in the first embodiment can be replaced by a U-shaped connector structure with an upward opening, which is not shown in the figure. After the structure is adopted, when the rotating support 2 and the fixed support 1 are stored and closed, the square pipes 2.1 at the two sides of the rotating support 2 can be also contained in the U-shaped groove of the U-shaped connecting piece for storage, and a hand clamping preventing gap is reserved between the square pipes 2.1 and the two inner side walls of the U-shaped groove; compared with the existing structure that two square tubes are hinged in a crossed manner, the width of the frame of the integral back-pushing bed frame is reduced, and the integral weight is reduced.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims (10)

1. The utility model provides a back of body pushes away bedstead, includes fixed frame (1) and revolving frame (2), the one end and the fixed frame (1) of revolving frame (2) are rotated and are connected, be equipped with on fixed frame (1) and be used for driving revolving frame (2) pivoted drive assembly, its characterized in that: the fixed frame (1) comprises two L-shaped connecting pieces (1.1) positioned on two sides of the fixed frame or a U-shaped connecting piece with an upward opening, the rotating frame (2) comprises two square tubes (2.1) positioned on two sides of the rotating frame, and one ends of the two square tubes (2.1) are respectively and rotatably connected in a right-angle area of the L-shaped connecting piece (1.1) or a groove of the U-shaped connecting piece; and an anti-pinch gap is left between the side wall of the square pipe (2.1) and the inner side wall of the L-shaped connecting piece (1.1) or the U-shaped connecting piece.

2. The pushback frame of claim 1, wherein: fixed frame (1) still includes first horizontal pole (1.2) and second horizontal pole (1.3), just first horizontal pole (1.2), second horizontal pole (1.3) are connected two respectively between the front and back both ends of L type connecting piece (1.1) or U type connecting piece, drive assembly's one end is connected on first horizontal pole (1.2), and the other end is connected with revolving frame (2).

3. The pushback bed frame of claim 2, wherein: the rotating frame (2) further comprises a third cross rod (2.2), the two ends of the third cross rod (2.2) are connected to the other ends of the square pipes (2.1) respectively, and one end, far away from the first cross rod (1.2), of the driving assembly is connected to the third cross rod (2.2).

4. The pushback bed frame of claim 3, wherein: the driving assembly comprises an electric push rod (3), and two ends of the electric push rod (3) are respectively hinged to the first cross rod (1.2) and the third cross rod (2.2).

5. The pushback bed frame of claim 4, wherein: the third cross rod (2.2) is rotatably connected with a hinged shaft (4) parallel to the third cross rod, one end of the electric push rod (3) is hinged to the hinged shaft (4), an auxiliary ejector rod (5) is further arranged on the hinged shaft (4), and a supporting vertical rod (1.4) is connected between the first cross rod (1.2) and the second cross rod (1.3); in an initial state, the auxiliary ejector rod (5) horizontally abuts against the upper surface of the vertical support rod (1.4), and one end, far away from the hinge shaft (4), of the auxiliary ejector rod (5) extends towards the position of the first cross rod (1.2); the lifting mechanism is characterized in that at the initial stage of lifting movement of the rotating frame (2), the auxiliary ejector rod (5) rotates towards the direction far away from the first cross rod (1.2), and the end part, far away from the hinge shaft (4), of the auxiliary ejector rod (5) is in sliding butt joint with the upper end face of the support vertical rod (1.4).

6. The pushback bed frame of claim 5, wherein: the lengths of the first cross rod (1.2), the second cross rod (1.3) and the third cross rod (2.2) are all adjustable.

7. The backpush bed frame of claim 6, wherein: first horizontal pole (1.2), second horizontal pole (1.3) and third horizontal pole (2.2) all include first connecting pipe (6), the both ends of first connecting pipe (6) are all slided nested and have second connecting pipe (7), each the other end of second connecting pipe (7) corresponds the connection respectively on the outer wall of L type connecting piece (1.1) or U type connecting piece.

8. The pushback bed frame of claim 7, wherein: the connecting structure is characterized in that the first connecting pipe (6) is an outer square pipe larger than the second connecting pipe in size, the second connecting pipe (7) is an inner square pipe matched with an inner hole of the outer square pipe, a plurality of threaded holes (7.1) extending along the length direction of the inner square pipe are formed in the outer wall of the inner square pipe, adjusting bolts (8) penetrate through two ends of the outer square pipe correspondingly, and the inner end of each adjusting bolt (8) can be assembled in any threaded hole (7.1).

9. The pushback frame of claim 1, wherein: the rotary frame (2) is provided with two telescopic woven belts (9) which are used for supporting a mattress and a human body and are connected between the square pipes (2.1).

10. The back frame as claimed in any one of claims 1 to 9, wherein: two side edges of the fixed frame (1) are provided with L-shaped connecting pieces (1.1), and one end of each square tube (2.1) is rotatably connected to a vertical plate (1.1.1) of each L-shaped connecting piece (1.1) through a hinge shaft; square pipe (2.1) with be connected with between vertical board (1.1.1) and be used for injecing prevent tong clearance's setting element (12).

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