CN217309619U

CN217309619U - Seat back plate and public seat

Info

Publication number: CN217309619U
Application number: CN202220707577.6U
Authority: CN
Inventors: 陈国洲
Original assignee: Guangdong Guoye Furniture Industry Co ltd
Current assignee: Guangdong Guoye Furniture Industry Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-08-30
Anticipated expiration: 2032-03-28

Abstract

The utility model discloses a chair back plate and a public chair, which comprises a back plate body, wherein the back plate body is bent to form a backrest and a seat plate, two sides of the seat plate are respectively provided with an installation wing, the two installation wings respectively extend from two sides of the seat plate to two sides of the backrest, the installation wings of the utility model can be embedded on an external handrail, an installer only needs to directly install the external handrail on an external supporting beam, thus realizing the simultaneous installation of the chair and the handrail, the installation efficiency is improved without independently installing the back plate body on the external supporting beam again, and a user can respectively generate pressure to the backrest and the seat plate in the use process, and the external handrail covers the installation wings, thereby reducing the possibility of relative deformation and fracture between the backrest and the seat plate, improving the installation strength and the use stability of the back plate body, improving the use experience of the user and facilitating the transportation, the transportation cost is reduced.

Description

Seat back plate and public seat

Technical Field

The utility model relates to a seat field, in particular to seat back board and public seat.

Background

Public chair on the market is seat and handrail body coupling mostly, then install on a supporting beam again, can be easy to assemble, but the great inconvenient transportation of volume, lead to the improvement of cost of transportation, in order to solve the problem of transportation, some public chairs often have the chair foot that sets up along horizontal interval, be connected with the cross-section between two chair feet and be polygonal supporting beam, and, seat and handrail components of a whole that can function independently are detained respectively on a supporting beam, at last through threaded connection and supporting beam relatively fixed, in order to prevent between seat and the supporting beam, relative rotation or rocking between handrail and the supporting beam, but, because need install seat and handrail respectively on a supporting beam, lead to required installation time long, the installation effectiveness is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a seat back plate to solve one or more technical problem that exist among the prior art, provide a profitable selection or create the condition at least.

The utility model provides a solution of its technical problem is:

the utility model provides a seat back plate, includes the backplate body, the backplate body is buckled and is formed back and bedplate, the both sides of bedplate all are equipped with the installation wing, two the installation wing is followed respectively the both sides of bedplate extend to the both sides of back.

The technical scheme at least has the following beneficial effects: the backplate body is including the back and the bedplate of buckling each other, the both sides of back part and bedplate part all have the installation wing, the installation wing can the gomphosis on the handrail of peripheral hardware, the installer only need be with the handrail direct mount of peripheral hardware on a peripheral hardware supporting beam, can realize seat and handrail and install simultaneously, need not install the backplate body on a peripheral hardware supporting beam alone once more, improve the installation effectiveness, and, the user is in the use, can produce pressure to back and bedplate respectively, and the handrail cladding installation wing of peripheral hardware, reduce relative deformation and cracked possibility between back and the bedplate, the installation intensity and the stability in use of backplate body have been improved, improve user's use experience, can conveniently transport simultaneously, reduce the cost of transportation.

As a further improvement of the above technical solution, an end surface of the backrest connected to the top surface of the seat plate is a front surface of the backrest, and a cushion laying groove is provided on the front surface of the backrest and/or the top surface of the seat plate. When the user sits on the seat back plate, the user can directly contact with the top surface of the seat plate and the front surface of the backrest, and an installer can add soft materials on the bedding groove of the back plate body, so that the user can directly contact with the soft materials when sitting on the back plate body, and the use experience of the user is improved.

Additionally, the utility model provides a public chair, including foretell seat back board, including the handrail, the handrail is located the both sides of backplate body, the handrail include the upper pressing strip, with complex holding down strip about the upper pressing strip, the upper pressing strip with enclose into the installation cavity between the holding down strip, the installation wing is located in the installation cavity.

The technical scheme at least has the following beneficial effects: go up the layering and the strip of pushing down mutually supports, and press the installation wing to press from both sides the installation intracavity of reserving between last layering and the strip of pushing down, make relatively fixed between installation wing and the handrail, the installer only need with handrail direct mount on a supporting beam of peripheral hardware, can realize the installation when seat and handrail, not only convenient transportation, reduce the cost of transportation, and improve the installation effectiveness, go up the layering and the strip of pushing down covers the installation wing simultaneously, improve the conflict area to the installation wing, improve the installation intensity to the backplate body.

As above-mentioned technical scheme's further improvement, the utility model discloses still include coupling assembling, coupling assembling is located in the installation cavity, it is a plurality of coupling assembling follows the extending direction interval of installation cavity sets up, coupling assembling includes connecting piece and lower connecting piece, it sets up to go up the connecting piece the bottom surface of upper moulding strip, lower connecting piece set up the top surface of lower moulding strip, it is same towards it to go up the connecting piece in the coupling assembling the lower connecting piece extends, be equipped with on the installation wing and dodge the opening, it stretches into to go up the connecting piece dodge in the opening. In the assembling process, the upper connecting piece of each group of connecting components passes through the corresponding avoidance opening and is mutually positioned and fixed with the lower connecting piece, so that the upper pressing strip and the lower pressing strip are mutually connected and fixed, the plurality of connecting components are arranged along the extending direction of the mounting cavity, the mounting stability between the upper pressing strip and the lower pressing strip is improved, the avoidance opening can ensure the self-finding and positioning of the upper connecting piece, the mounting efficiency between the upper pressing strip and the lower pressing strip is improved, meanwhile, the positioning of the mounting wings on the handrail can be realized without mechanically connecting the mounting wings, and the mounting strength of the mounting wings is improved.

As another improvement of the technical scheme, a clamping block is arranged at the top end of the upper pressing strip, and the bottom surface of the clamping block is abutted to the top surface of the lower pressing strip. The top of the upper pressing strip and the top of the lower pressing strip extend to the top of the installation wing corresponding to the backrest position, the installation wing is clamped by the upper pressing strip and the lower pressing strip, a clamping block is arranged at the top of the upper pressing strip, and the clamping block extends towards the direction of the lower pressing strip, so that the upper pressing strip can be buckled at the top of the lower pressing strip through the clamping block, a positioning effect is achieved, the upper pressing strip and the lower pressing strip can be conveniently connected and fixed, meanwhile, the clamping block provides a bearing effect for the upper pressing strip, the shearing stress of a connection part between the upper pressing strip and the lower pressing strip is reduced, and the installation stability is improved.

As another improvement of above-mentioned technical scheme, the bottom surface of upper bead and/or be equipped with the limiting plate on the top surface of lower bead, the limiting plate is followed the extending direction of installation cavity sets up, the limiting plate will first cavity and second cavity are separated into to the installation cavity level, two or more the backplate body sets up side by side, passes through between two adjacent backplate bodies the handrail is connected, makes adjacent two the installation wing of backplate body is located the first cavity and the second cavity of same handrail respectively. The both sides of every backplate body all are equipped with the handrail, and the utility model discloses can be including two or above backplate bodies, handrail and backplate body interval setting in proper order, when the both sides of a handrail all are equipped with the backplate body, the installation wing of the backplate body of handrail one side stretches into in the first cavity of this handrail, the installation wing of handrail opposite side backplate body then stretches into in the second cavity of this handrail, make the installation wing of two backplate bodies of handrail simultaneous location respectively, reduce installation time, improve the installation effectiveness, and can reduce the space and occupy, reduce the reservation length of a supporting beam of peripheral hardware simultaneously, realize public seat's miniaturization.

As another improvement of the above technical scheme, a positioning concave surface is arranged on the end surface of the mounting wing, a positioning block is arranged on the bottom surface of the upper pressing strip, and the positioning block extends into the positioning concave surface. The position of locating piece is injectd to the location concave surface, for the counterpoint effect of playing of upper pressure strip, improves the installation effectiveness of upper pressure strip and layering down, guarantees simultaneously at upper pressure strip and layering down the installation back, prevents that the installation wing from droing from the installation intracavity, improves installation stability.

As a further improvement of the technical scheme, the top surface of the lower pressing strip is provided with a reinforcing rib, the positioning concave surface extends downwards, and the positioning concave surface is opposite to the reinforcing rib. The strengthening rib can improve the atress intensity of layering down to, use at the user the utility model discloses a during public chair, can produce decurrent pressure and warp down to the backplate body, the strengthening rib can carry out the bearing to the location concave surface, improves the bearing intensity of backplate body.

As another kind of improvement of above-mentioned technical scheme, the utility model discloses still include chair foot, a supporting beam and buckling piece, two or more the chair foot is along a supporting beam's length direction interval arrangement, the buckling piece can dismantle connect in on the layering down and with the layering is gone down encloses into installation space, installation space's shape with a supporting beam's shape matches each other, a supporting beam is located in the installation space. Go up layering and holding down the strip and mutually support and press from both sides the installation wing tightly, through the cooperation of holding down strip and buckling piece, with handrail part and the buckling of backplate body part on a supporting beam, the chair foot supports a supporting beam, only need assemble a supporting beam with buckling piece and holding down strip on, need not install the backplate body on a supporting beam of peripheral hardware once more alone, improve the installation effectiveness.

As another improvement of the technical scheme, the cross section of the supporting beam is pentagonal, and two top surfaces of the supporting beam are obliquely and upwards converged to form a top edge. A supporting beam cross-section is the polygon, reduces the rotation of handrail or rocks to two top surfaces homoclines of a supporting beam upwards converge and form the pentagonal topside, make two inclined planes can support and the bearing to pushing down the strip part, prevent that pushing down the strip and directly pressing on the plane, reduce a supporting beam's collapse phenomenon, can transmit the pressure that pushes down the strip and receive, even atress, and can bear most top pressure, reduce a supporting beam and warp, improve a supporting beam's structural stability.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a structural view of a seat back and an armrest according to an embodiment of the present invention;

fig. 2 is an internal cross-sectional view of the mounting wing, upper bead and lower bead provided in accordance with an embodiment of the present invention;

fig. 3 is a structural diagram of a lower molding bar according to an embodiment of the present invention;

fig. 4 is a structural view of a public chair according to an embodiment of the present invention.

In the drawings: 110-a back plate body, 111-a backrest, 112-a seat plate, 113-a cushion paving groove, 130-a handrail, 140-an upper pressing strip, 141-a clamping block, 150-a lower pressing strip, 210-a mounting wing, 211-an avoiding gap, 212-a positioning concave surface, 220-a mounting cavity, 230-an upper connecting piece, 240-a lower connecting piece, 250-a positioning block, 260-a reinforcing rib, 310-a limiting plate, 311-a first cavity, 312-a second cavity, 410-a chair leg, 420-a supporting beam and 430-a buckling piece.

Detailed Description

The conception, specific structure, and technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings, so that the objects, features, and effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The utility model provides an each technical feature can the interactive combination under the prerequisite of conflict each other.

In the description of the present invention, it should be understood that the directional descriptions, such as the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 and 2, the public chair comprises a chair back plate and armrests 130, wherein the chair back plate comprises a back plate body 110, the back plate body 110 is bent to form a backrest 111 and a seat plate 112, mounting wings 210 are arranged on both sides of the seat plate 112, the two mounting wings 210 extend from both sides of the seat plate 112 to both sides of the backrest 111 respectively, the armrests 130 are located on both sides of the back plate body 110, each armrest 130 comprises an upper pressing strip 140 and a lower pressing strip 150 which is vertically matched with the upper pressing strip 140, a mounting cavity 220 is defined between the upper pressing strip 140 and the lower pressing strip 150, and the mounting wings 210 are located in the mounting cavity 220. Specifically, the extension shape of the mounting wing 210 is consistent with the side extension direction of the back plate body 110, so that the mounting wing 210 is also bent like the back plate body 110, the upper pressing strip 140 and the lower pressing strip 150 are matched with each other to form a mounting cavity 220 therebetween, and the mounting wing 210 is clamped in the mounting cavity 220 reserved between the upper pressing strip 140 and the lower pressing strip 150, so that the mounting wing 210 and the armrest 130 are relatively fixed, an installer only needs to directly install the armrest 130 on the external supporting beam 420, and can realize the simultaneous installation of the seat and the armrest 130, thereby improving the mounting efficiency, meanwhile, the upper pressing strip 140 and the lower pressing strip 150 cover the mounting wing 210, improving the contact area of the mounting wing 210, reducing the possibility of relative deformation and fracture between the backrest 111 and the seat plate 112, improving the mounting strength and the use stability of the back plate body 110, and improving the mounting strength of the back plate body 110. In addition, the upper pressing bar 140 and the lower pressing bar 150 may be screwed or snap-fitted, or both the upper pressing bar 140 and the lower pressing bar 150 may be detachably coupled to the mounting wing 210.

The end face of the backrest 111 connected with the top face of the seat plate 112 is the front face of the backrest 111, the front face of the backrest 111 and the top face of the seat plate 112 are provided with cushion grooves 113, and the cushion grooves 113 on the backrest 111 and the cushion grooves 113 on the seat plate 112 are connected with each other. The foreside that the foreshadowing groove 113 extends to back 111 from the top surface of bedplate 112 facilitates the installer to install the cushion additional on the foreshadowing groove 113 of backplate body 110 for the user can directly contact with soft material when sitting on backplate body 110, improves user's travelling comfort. In fact, the cushion pan 113 of the backrest 111 and the cushion pan 113 of the seat plate 112 may be independent from each other, and the cushion pan 113 may be separately provided on the backrest 111 or the seat plate 112, increasing the design manner.

In order to facilitate the positioning between the upper pressing bar 140 and the lower pressing bar 150, in some embodiments, a top end of the upper pressing bar 140 is provided with a fixture block 141, and a bottom surface of the fixture block 141 abuts against a top surface of the lower pressing bar 150. The top end of the upper pressing strip 140 and the top end of the lower pressing strip 150 both extend to the top end of the mounting wing 210 corresponding to the backrest 111, the mounting wing 210 is clamped between the upper pressing strip 140 and the lower pressing strip 150, a clamping block 141 is arranged at the top end of the upper pressing strip 140, and the clamping block 141 extends towards the direction of the lower pressing strip 150, so that the upper pressing strip 140 can be buckled on the top end of the lower pressing strip 150 through the clamping block 141, a positioning effect is achieved, the upper pressing strip 140 and the lower pressing strip 150 can be conveniently connected and fixed, meanwhile, the clamping block 141 provides a bearing effect for the upper pressing strip 140, the shearing stress of the connection part between the upper pressing strip 140 and the lower pressing strip 150 is reduced, and the mounting stability is improved.

Referring to fig. 2 and 3, in this embodiment, the present invention further includes a connecting assembly, the connecting assembly is located in the installation cavity 220, a plurality of connecting assemblies are arranged at intervals along an extending direction of the installation cavity 220, the connecting assembly includes an upper connecting member 230 and a lower connecting member 240, the upper connecting member 230 is arranged on a bottom surface of the upper bead 140, the lower connecting member 240 is arranged on a top surface of the lower bead 150, the upper connecting member 230 extends toward the lower connecting member 240 in the same connecting assembly, and the upper connecting member 230 and the lower connecting member 240 are locked by screws, an avoiding gap 211 is arranged on the installation wing 210, and the upper connecting member 230 extends into the avoiding gap 211. In fact, the upper connecting member 230 may be directly fastened to the lower connecting member 240 by a snap structure, or the upper connecting member 230 and the lower connecting member 240 may be detachably connected to the mounting wing 210, respectively. It should be noted that the avoiding gap 211 can enable the upper connecting member 230 to pass through the mounting wing 210 and be connected with the lower connecting member 240, so as to reduce interference between components, and the avoiding gap 211 can achieve the function of self-positioning of the upper connecting member 230, and the upper connecting member 230 is aligned with the hole position by moving the upper pressing strip 140 on the mounting wing 210, so as to facilitate the mounting between the upper pressing strip 140 and the lower pressing strip 150. In addition, the upper connecting member 230 and the lower connecting member 240 may also be respectively located at two sides of the avoiding gap 211, and the avoiding gap 211 may facilitate the insertion of the screw.

Further, a limiting plate 310 is arranged on the top surface of the pressing bar 150, the limiting plate 310 is arranged along the extending direction of the installation cavity 220, so that the limiting plate 310 horizontally divides the installation cavity 220 into a first cavity 311 and a second cavity 312, and a plurality of seats are often arranged on an actual public chair, the number of the back plate bodies 110 of the utility model is three, the back plate bodies 110 and the armrests 130 are arranged in sequence at intervals, so that two adjacent back plate bodies 110 can be connected through the armrests 130, when the back plate bodies 110 are arranged on both sides of one armrest 130, the installation wings 210 of the back plate body 110 on one side of the armrest 130 extend into the first cavity 311 of the armrest 130, the installation wings 210 of the back plate body 110 on the other side of the armrest 130 extend into the second cavity 312 of the armrest 130, and the installation wings 210 of the two back plate bodies 110 can be positioned through the limiting plate 310, thereby facilitating the installation, the limiting plate 310 divides the mounting cavity 220 into two chambers, so that one armrest 130 can simultaneously position the mounting wings 210 of two back plate bodies 110, respectively. It should be noted that, after the upper pressing bar 140 and the lower pressing bar 150 are connected and fixed, a mounting gap is left between two sides of the upper pressing bar 140 and two sides of the lower pressing bar 150, so as to ensure that the mounting wing 210 can extend into the mounting cavity 220 through the mounting gap, thereby reducing interference. In addition, the limiting plate 310 can also be arranged on the upper pressing strip 140, or the limiting plates 310 are arranged on both the upper pressing strip 140 and the lower pressing strip 150, so that the limiting effect is improved, and meanwhile, the effect of reinforcing the structure is also achieved. It should be noted that the first cavity 311 and the second cavity 312 are symmetrical to each other with the limiting plate 310 as a reference, which facilitates the installation of different backplane bodies 110. In addition, the lower connectors 240 are spaced apart from each other on the limiting plate 310 of the lower bead 150 in the extending direction of the limiting plate 310, and the upper connectors 230 may be spaced apart from each other on the limiting plate 310 of the upper bead 140 in the extending direction of the limiting plate 310.

In addition, in this embodiment, the end surface of the mounting wing 210 is provided with positioning concave surfaces 212, the positioning concave surfaces 212 are arranged at intervals along the extending direction of the mounting wing 210, the bottom surfaces of the upper pressing bar 140 corresponding to the first cavity 311 and the second cavity 312 are respectively provided with a positioning block 250, the number and the positions of the positioning blocks 250 and the positioning concave surfaces 212 are matched one by one, the positioning blocks 250 can extend into the positioning concave surfaces 212, the positioning concave surfaces 212 limit the positions of the positioning blocks 250, so as to perform an alignment function for the upper pressing bar 140, improve the mounting efficiency of the upper pressing bar 140 and the lower pressing bar 150, and simultaneously ensure that after the upper pressing bar 140 and the lower pressing bar 150 are mounted, the mounting wing 210 is prevented from falling off from the mounting cavity 220, and improve the mounting stability. Moreover, all be equipped with strengthening rib 260 on the top surface that pushes down strip 150 and correspond first cavity 311 and second cavity 312, the quantity and the position one-to-one of a plurality of strengthening ribs 260 and a plurality of location concave surface 212 match, location concave surface 212 downwardly extending, location concave surface 212 is just to strengthening rib 260, and strengthening rib 260 can improve the stress intensity of pushing down strip 150, and, uses at the user the utility model discloses a during public chair, can produce decurrent pressure and warp down to backplate body 110, strengthening rib 260 can carry out the bearing to location concave surface 212, improves backplate body 110's bearing intensity.

Referring to fig. 4, the present invention further includes chair legs 410, a supporting beam 420 and a fastener 430, wherein two or more chair legs 410 are arranged along the length direction of the supporting beam 420 at intervals, the fastener 430 is detachably connected to the lower pressing bar 150 and encloses an installation space with the lower pressing bar 150, the shape of the installation space is matched with the shape of the supporting beam 420, and the supporting beam 420 is located in the installation space. The upper pressing strip 140 and the lower pressing strip 150 are mutually matched and clamp the mounting wing 210, the handrail 130 and the back plate body 110 are partially buckled on the supporting beam 420 through the matching of the lower pressing strip 150 and the buckling piece 430, the chair leg 410 supports the supporting beam 420, the buckling piece 430 and the lower pressing strip 150 are only required to be assembled on the supporting beam 420, the back plate body 110 is not required to be independently mounted on the external supporting beam 420 again, and the mounting efficiency is improved. In practical use, the upper pressing strip 140 is formed with a hand supporting portion, so that a user can conveniently place a hand on the handrail 130, the bottom shape of the lower pressing strip 150 is matched with the upper top surface of the supporting beam 420, the top of the buckling member 430 is matched with the lower top surface of the supporting beam 420, and the lower pressing strip 150 and the buckling member 430 can be locked and matched in a threaded locking or rotating buckling manner.

Moreover, in order to improve the supporting effect of the supporting beam 420, in the embodiment, the cross section of the supporting beam 420 is pentagonal, and two top surfaces of the supporting beam 420 are combined obliquely upward to form a top edge. Supporting beam 420 cross-section is the polygon, reduce rotation or the rocking of handrail 130, and two top surfaces homogeneous slope of supporting beam 420 upwards join and form the roof side of pentagon, make two inclined planes can support and the bearing to depression bar 150 part, prevent that depression bar 150 from directly pressing on the plane, reduce the phenomenon of collapsing of supporting beam 420, can transmit the pressure that depression bar 150 received, even atress, and can bear the top pressure of the overwhelming majority, it warp to reduce supporting beam 420, improve supporting beam 420's structural stability. In fact, the cross section of the support beam 420 may be triangular, quadrangular, hexagonal, etc., and this embodiment is not particularly limited thereto.

The above description is for the purpose of illustrating the preferred embodiments of the present invention, but the present invention is not limited to the illustrated embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are included in the scope of the present invention defined by the appended claims.

Claims

1. A seat back, comprising: including backplate body (110), backplate body (110) are buckled and are formed back (111) and bedplate (112), the both sides of bedplate (112) all are equipped with installation wing (210), two installation wing (210) are followed respectively the both sides of bedplate (112) extend to the both sides of back (111).

2. A seat back according to claim 1, wherein: the end face of the backrest (111) connected with the top face of the seat plate (112) is used as the front face of the backrest (111), and the front face of the backrest (111) and/or the top face of the seat plate (112) are/is provided with bedding grooves (113).

3. A public seat comprising the seat back as claimed in any one of claims 1 to 2, wherein: including handrail (130), handrail (130) are located the both sides of backplate body (110), handrail (130) include upper depression bar (140), with upper depression bar (140) cooperation from top to bottom down go down layering (150), enclose into installation cavity (220) between upper depression bar (140) and lower depression bar (150), installation wing (210) are located in installation cavity (220).

4. A public seat as claimed in claim 3, wherein: still include coupling assembling, coupling assembling is located in installation cavity (220), it is a plurality of coupling assembling follows the extending direction interval of installation cavity (220) sets up, coupling assembling includes connecting piece (230) and lower connecting piece (240), it sets up to go up connecting piece (230) the bottom surface of last layering (140), and lower connecting piece (240) set up the top surface of layering (150) down, it is same towards it to go up connecting piece (230) in the coupling assembling connecting piece down connecting piece (240) extend, be equipped with on installation wing (210) and dodge opening (211), it stretches into to go up connecting piece (230) in dodging opening (211).

5. A public seat as claimed in claim 3, wherein: a clamping block (141) is arranged at the top end of the upper pressing strip (140), and the bottom surface of the clamping block (141) is abutted to the top surface of the lower pressing strip (150).

6. A public seat as claimed in claim 3, wherein: go up the bottom surface of layering (140) and/or be equipped with limiting plate (310) on the top surface of layering (150) down, limiting plate (310) are followed the extending direction setting of installation cavity (220), limiting plate (310) will first cavity (311) and second cavity (312) are separated into to installation cavity (220) level, two or more backplate body (110) set up side by side, pass through between two adjacent backplate bodies (110) handrail (130) are connected, make adjacent two the installation wing (210) of backplate body (110) are located first cavity (311) and the second cavity (312) of same handrail (130) respectively.

7. A public seat as claimed in claim 3, wherein: the end face of the mounting wing (210) is provided with a positioning concave surface (212), the bottom surface of the upper pressing strip (140) is provided with a positioning block (250), and the positioning block (250) extends into the positioning concave surface (212).

8. A public seat as claimed in claim 7, wherein: the top surface of the lower pressing strip (150) is provided with a reinforcing rib (260), the positioning concave surface (212) extends downwards, and the positioning concave surface (212) is opposite to the reinforcing rib (260).

9. A public seat as claimed in claim 3, wherein: the chair leg assembly comprises a supporting beam (150) and is characterized by further comprising chair legs (410), a supporting beam (420) and fasteners (430), wherein two or more chair legs (410) are arranged at intervals along the length direction of the supporting beam (420), the fasteners (430) are detachably connected to the lower pressing strip (150) and form an installation space with the lower pressing strip (150), the shape of the installation space is matched with that of the supporting beam (420), and the supporting beam (420) is located in the installation space.

10. A public seat as claimed in claim 9, wherein: the cross section of the support beam (420) is pentagonal, and two top surfaces of the support beam (420) are obliquely upwards converged to form a top edge.