CN210989241U

CN210989241U - Handrail

Info

Publication number: CN210989241U
Application number: CN201921292610.8U
Authority: CN
Inventors: 李刚; 郑捷; 阮正富
Original assignee: UE Furniture Co Ltd
Current assignee: UE Furniture Co Ltd
Priority date: 2019-08-11
Filing date: 2019-08-11
Publication date: 2020-07-14
Anticipated expiration: 2029-08-11

Abstract

The utility model relates to a handrail, which is provided with a handrail supporting piece for supporting the arm of a human body and a handrail bracket for connecting the handrail supporting piece with a seat supporting piece; the handrail support device is characterized by also comprising an extension part, wherein one end of the extension part is fixedly connected with the handrail, the other end of the extension part extends upwards and is at least 15cm higher than the handrail support, and the part of the extension part higher than the handrail support is configured to be connected with the back support; the extension part changes the connection position of the back support when in specific application, which is equivalent to moving the connection position of the back support upwards, thereby reducing the stress on the lower part of the back support to a certain extent, transmitting more leaning force applied by a seated person to the armrest part through the back support, and bearing more leaning force by the armrest part, thus being beneficial to the light and thin design of the back support.

Description

Handrail

Technical Field

The utility model relates to an office chair field, in particular to handrail for seat.

Background

At present, a chair is available in the market, armrests are symmetrically arranged on the left side and the right side, and the middle lower part of the chair back is fixedly connected with the two armrests; specifically, closed ring-shaped armrests are symmetrically arranged on two sides of a seat board of the seat, and two sides of the middle-lower part of the seat back are respectively fixedly connected with the rear sides of the two armrests.

The seat is characterized in that: when a human body sits on the chair, the back of the human body firstly contacts with a back support piece, namely a chair back, of the chair in the process of leaning backwards, so that the stress of the chair is firstly the middle upper part of the chair back and then is downwards transmitted to the armrest position through the back support piece; the back support and the handrail are pressed by the human body about half, so the middle and lower part of the back support connected with the handrail needs to be reinforced and thickened, and a fastener is also necessary to fixedly connect the back support and the handrail. The thickened back support, while adequate for normal use, increases the cost of manufacturing and shipping the seat.

As shown in fig. 16 and 17, in the first seat, the middle lower portion of the back support 102 is fixedly connected to the square armrest 101, specifically, the portion of the rear side of the armrest 101 extending along the thickness direction of the armrest 101 abuts against the rear end face of the middle lower portion of the back support 102, and the armrest 101 and the back support 102 are fastened by the screw 105; since the middle-lower portion of the back support 102 is fixedly connected to the armrest 101, the shape of the middle-lower portion of the back support 102 is fixed, but in order to improve the comfort of lumbar support, a lumbar support 103 is additionally provided to support the lumbar region of the human body.

For example, a second seat shown in fig. 18 and 19 is also similar in structure, and the middle lower part of the seat back 108 is clamped by two armrests 107 and fixedly connected by a screw 109.

Still further, the common characteristics of the two seats are as follows: the middle lower part of the back support needs firmer materials due to the necessity of support, the size is thicker than that of the upper half part, and the shape of the middle lower part of the back support is very single, which is only needed for fixed connection; in such a seat, the lower-middle shape of the back support is not sufficient to support the waist of the human body comfortably, so that a lumbar support is usually additionally installed at the lumbar support position of the back support, which increases the process and cost.

Disclosure of Invention

The utility model overcomes exist not enough among the above-mentioned prior art, provide an armrest, through improving this armrest structure, made it be equipped with an extension part, when concrete application, this extension part is connected with back of the body support piece for the leaning force that just sits and applys is more transmitted the armrest by back of the body support piece, undertakes more leaning force by the armrest, thereby can reduce back of the body support piece's atress.

The technical scheme of the utility model is realized like this:

an armrest having an armrest support for supporting a human arm and an armrest support bracket for connecting the armrest support to a seat support; the back support is characterized by further comprising an extension part, one end of the extension part is fixedly connected with the handrail, the other end of the extension part extends upwards and is at least 15cm higher than the handrail support, and the part of the extension part, which is higher than the handrail support, is configured to be connected with the back support.

Preferably, the extension part is a rod-shaped part, and the extension part is formed by extending the rear end of the handrail support upwards. The extension part is a rod-shaped part, has a simple and elegant structure, is arranged at the rear end of the armrest part, and does not obstruct the support of the forearms and hands of the sitting person.

Preferably, the extension is rigid and the vertical height of the upper end of the extension to the rear end of the handrail support is 15-50 cm. The extension part is rigid, so that stable support can be realized for the back support, a certain height distance is kept between the upper end of the extension part and the rear end of the handrail support, and the fixed mounting position of the back support can be effectively moved upwards; the leaning force of the seated person is directly received by the extension part and transmitted to the armrest.

Preferably, the vertical height of the upper end of the extension member from the rear end of the arm support is 20-35 cm. The upper end of the extension part is positioned at the same height position as the middle of the back of the sitting person due to the height design, so that the pressure applied by the back of the sitting person can be borne more, and the design that the connecting part of the back support and the extension part is thin is facilitated.

Preferably, the extending part is integrally arranged in a backward inclining mode, and the included angle between the extending part and the vertical line is 5-20 degrees. The extending part is obliquely and obliquely inclined backwards, so that the back support piece keeps an inclined state, a seated person can conveniently lean against the back support piece, and the back support piece accords with human engineering.

Preferably, the extension part is tapered from bottom to top. The connecting part of the extension part and the handrail is thick, so that the stable firmness of the connecting root is realized; the upper part of the extension part is thin and can be integrated with the back support, thereby meeting the connection strength and being beneficial to aesthetic design.

Preferably, the handrail is in the shape of a closed loop, the elongate member being outside the closed loop. The handrail is in a closed loop shape, which is beneficial to processing, and the whole structure document is convenient to be fixedly connected with the seat supporting piece.

Preferably, the handrail support comprises a front support rod, a rear support rod and a bottom support rod, the upper ends of the front support rod and the rear support rod are connected with the front end and the rear end of the handrail support, and the lower ends of the front support rod and the rear support rod are connected with the front end and the rear end of the bottom support rod; the extension part is formed by extending upwards at the intersection of the handrail supporting part and the rear support rod. The handrail is in a square shape, has strong stability and can bear larger backward pressure.

Preferably, the bottom bracket bar is formed with a mounting plate extending in the width direction of the armrest. This facilitates the connection with the seat support.

Preferably, the handrail support comprises a front frame rod and a rear frame rod, the upper ends of the front frame rod and the rear frame rod are connected to the front end and the rear end of the handrail support member, the front frame rod, the rear frame rod and the handrail support member form a U-shaped structure, and the extension part is formed by upwards extending the intersection of the handrail support member and the rear frame rod. The handrail is U-shaped and is fixedly connected with the seat supporting piece, and the support for the arm and the back supporting piece can be realized.

Preferably, the armrest support is formed in a closed loop shape or an inverted V shape, a rear end of the armrest support is connected to an upper portion of the armrest support, and an extension member is connected to an upper end of the armrest support and extends obliquely rearward and upward from the upper end of the armrest support.

Preferably, the extension member is fixedly connected with the armrest support through a fastener, or the extension member and the armrest support are integrally formed.

Preferably, the extension part and the armrest part are integrally molded by plastic materials. Particularly, the material can be made of PP material, so that the use strength is met, and the mass production is convenient.

Preferably, the extension member and the armrest portion are substantially on the same plane. This makes it possible not only to facilitate the machining but also to make it possible for the armrest portion to provide a stable foundation support for the extension member.

Preferably, the extension member is provided with a mounting hole for use in cooperation with the back support, and the mounting hole is a through hole or a threaded hole.

Adopted above-mentioned technical scheme the utility model discloses a design departure point, theory and beneficial effect are:

the utility model discloses a give new structural design to the handrail, be equipped with extension part, this extension part is equivalent to the back of the body support of independent setting, and extension part exceed handrail support piece, consequently changed the hookup location of back of the body support piece when specifically using, equivalent to make the hookup location of back of the body support piece shift up, thereby can reduce the atress of back of the body support piece lower part to a certain extent, transmit more the leaning force that will sit on the back of the body support piece and exert to handrail portion, undertake more leaning force by handrail portion, can do benefit to the frivolous design of back of the body support piece like this; meanwhile, the lower half part of the back support piece can be configured to be flexible, and the lower half part of the back support piece is not bound by the armrests, so that the back support piece is more elastic while being beneficial to supporting the waist and the back of a human body, and a user can lean on the back support piece more comfortably.

Particularly, the utility model changes the stress distribution of the stress point of the chair back and the armrests when a human body sits, so that more leaning force of the human body is directly born by the armrests when the chair back is used specifically, the force born by the chair back is relatively less, the middle lower part of the chair back, namely the back support piece, can be designed into an independent waist rest without adding the waist rest on the chair back independently, and the user feels more comfortable when sitting; have because the above-mentioned structural design of the utility model makes the utility model discloses a seat structure is comparatively novel, has more the design aesthetic feeling.

Drawings

Fig. 1 is a schematic side view of a seat according to an embodiment 1 of the present invention;

fig. 2 is a schematic perspective view of a seat according to embodiment 1 of the present invention;

fig. 3 is a schematic view of the disassembled chair of the embodiment 1 of the present invention;

fig. 4 is a schematic perspective view of the seat of the present invention after the seat support is hidden in the seat of embodiment 1;

fig. 5 is a schematic perspective view of a back support according to embodiment 1 of the present invention;

FIG. 6 is an enlarged view of portion a of FIG. 3;

FIG. 7 is an enlarged view of portion b of FIG. 4;

FIG. 8 is an enlarged view of section c of FIG. 5;

fig. 9 is a rear view of the present invention in which the outer region of the back support is a vertical frame in embodiment 1;

fig. 10 is a side view of a back support member in example 1 of the present invention;

fig. 11 is a first perspective view of the armrest part according to embodiment 1 of the present invention;

FIG. 12 is an enlarged view of portion d of FIG. 11;

fig. 13 is a schematic perspective view of the armrest part according to embodiment 1 of the present invention;

fig. 14 is a third schematic perspective view of the armrest part according to embodiment 1 of the present invention;

FIG. 15 is an enlarged view of section e of FIG. 16;

FIG. 16 is a schematic perspective view of a first prior art seat;

FIG. 17 is a schematic perspective view of a first seat in the prior art;

FIG. 18 is a schematic perspective view of a second seat in the prior art;

FIG. 19 is a schematic perspective view of a second seat in the background art;

fig. 20 is a perspective view of a seat according to embodiment 2 of the present invention;

fig. 21 is a schematic view of the back structure of the back support member in example 1 of the present invention, in which a flexible fabric or mesh is used in the middle region;

FIG. 22 is a schematic view showing the structure of a back support in embodiment 3;

FIG. 23 is a schematic view showing a separate connection structure of the back support and the extension part in example 4;

FIG. 24 is a schematic view showing the structure of an armrest part according to embodiment 5;

FIG. 25 is a schematic structural view of an armrest part according to embodiment 6;

fig. 26 is a schematic structural view of an armrest part in embodiment 7;

FIG. 27 is a schematic top view of the seat in an unloaded condition;

fig. 28 is a schematic view of the deformation of the first frame side and bottom rails when rearward force is applied to the middle region of the back support.

The figures are numbered: a seat support 1; an armrest portion 2; an armrest support 2 a; a handrail support 2 b; front and rear frame bars 2c, 2 d; a bottom bracket rod 2 e; a mounting plate 2 f; 2g of intersection; an armrest support rear end 201; center of upper end of the armrest support 202; an extension member 3; an extension upper end 3 a; a back support 4; a connecting portion 5; a notch 6; a side stopper 7; a side shield inner side surface 7 a; a back stop portion 8; the front end surface 8a of the rear baffle part; a fastening portion 9; a lower rear end 9 a; a lower section side 9 b; a step 10; a screw hole 11; a mounting hole 12; first and second screws 13 and 14; a frame side 15; upper and lower ends 15a, 15b of the frame side; a first frame side 16; an upper section 16 a; a lower section 16 b; a second frame side 17; a top cross member 18; a bottom cross-piece 19; mounting hole sites 20; a top end 21; an outer region 22; a middle region 23; the side edges 24; a first arrow 25; a second arrow 26; an intermediate position 27; a plug 28; a plug groove 29; a connecting portion 30; the aperture 31; a card slot 32; a screw 33; a hook 34; a clip groove 35; mounting feet 36.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below. The utility model discloses the description based on the position is described with handrail and seat in normal use state.

The specific implementation manner of the utility model is as follows:

example 1: the utility model discloses an armrest is the component of seat, and the following is whole to be described in detail to the seat:

as shown in fig. 1 to 15, the present embodiment provides a seat including:

a seat support 1 for supporting a seated person, an armrest part 2 fixedly provided at a side portion of the seat support 1, the armrest part 2 having an armrest support 2a for supporting an arm of a human body and an armrest support 2b for connecting the armrest support 2a to the seat support 1; and an extension part 3 fixedly connected with the armrest part 2 and gradually reduced in width from bottom to top, wherein the extension part 3 is a part higher than the armrest support part 2 a; and a back support 4 fixedly connected only to the extension 3.

Specifically, the seat support 1 is a seat support plate of a chair, which is usually a wood plate or a plate made of plastic material, and a cushion made of sponge can be arranged on the seat support 1 during use; the armrest parts 2 are symmetrically arranged at the left side and the right side of the seat supporting part 1; the armrest portion 2 is disposed generally perpendicular to the seat support 1.

The armrest portion 2 is an independent part which is conveniently connected to the seat support 1. As shown in fig. 1-4, the armrest portion 2 is in a closed loop shape, the armrest support 2a is disposed substantially horizontally and 15-25cm higher than the upper end surface of the seat support 1 to support the arm of the user, and the lower end of the armrest support 2b is fixedly connected to the seat support 1.

Further, the extension member 3 is located on a plane substantially in the same longitudinal direction as the armrest support member 2a and the armrest support member 2 b; the handrail support 2b comprises a front frame rod 2c and a rear frame rod 2d which are approximately vertically arranged and a bottom frame rod 2e which is approximately horizontally arranged, the upper ends of the front frame rod 2c and the rear frame rod 2d are connected with the front end and the rear end of the handrail support 2a, and the lower ends of the front frame rod 2c and the rear frame rod 2d are connected with the front end and the rear end of the bottom frame rod 2e, so that the shape of the handrail part 2 is formed into a square shape, the stability is strong, and the backward pressure can be borne; more specifically, for the convenience of formation, the armrest support 2b and the armrest support 2a are integrally formed of a plastic material.

For the convenience of the connecting seat support member 1, an installation plate 2f extending along the width direction of the armrest part 2 is formed on the bottom bracket rod 2e, the installation plate 2f is positioned below the seat support member 1, a convex installation hole position 20 is arranged on the installation plate 2f, and when the seat support member is specifically installed, a screw is screwed into the installation hole position 20 and connected to the seat support member 1, so that the installation and fixation of the installation plate 2f and the whole armrest part 2 are realized.

In the present embodiment, the extension part 3 is formed by extending upward the intersection 2g of the handrail supporting member 2a and the rear frame bar 2 d; specifically, the extension part 3 is a rod-shaped part, has a simple structure, is arranged at the rear end position of the armrest part 2, and does not obstruct the support of the forearms and hands of the sitting person; and the extension part 3 is rigid, so that the back support 4 can be stably supported.

The utility model discloses independent extension part 3 has been set up, just extension part 3 exceed handrail support piece 2a, consequently changed back of the body support piece 4's hookup location, make back of the body support piece 4's hookup location shift up in other words to can reduce the atress of back of the body support piece 4 lower part to a certain extent, the leaning force that will just sit the person and apply is more transmitted for handrail portion 2 by extension part 3, comes directly to undertake more leaning force by handrail portion 2, can do benefit to the design of back of the body support piece 4 frivolous like this.

Extension part 3 and handrail portion 2 are PP material integrated into one piece in this embodiment, satisfy the use intensity while, are convenient for mass production again. The connecting part of the extension part 3 and the armrest part 2 is thick, so that the stable firmness of the connecting root is realized; the thin upper part of the extension part 3 can be integrated with the back support 4, which is favorable for aesthetic design while satisfying the connection strength.

A certain height distance is kept between the upper end 3a of the extension part and the rear end 201 of the armrest support part, so that the fixed installation position of the back support part 4 can be effectively moved upwards; the leaning force of the seated person is directly received by the extension part 3 and transmitted to the armrest part 2. In this embodiment, the vertical height of the upper end 3a of the extension to the rear end 201 of the arm support is specifically 20-25 cm. The upper end 3a of the extension part is arranged at the same height position as the middle of the back of the sitting person due to the height design, so that the pressure applied by the back of the sitting person can be borne more, and meanwhile, the test requirement is met.

This makes it possible not only to make the back support 4 as a whole thinner and lighter, but also to make the connecting portion 5 of the back support 4 and the extension member 3 thinner as compared with the background art, as shown in fig. 3. In addition, the extending part 3 is integrally arranged in a backward inclining way, specifically, the included angle between the extending part 3 and the plumb line is 5-20 degrees, in the embodiment, the included angle between the extending part 3 and the plumb line is preferably 10-15 degrees; the extending part 3 is obliquely and obliquely inclined backwards, so that the back support 4 keeps an inclined state, a seated person can lean against the back support conveniently, and the back support accords with human engineering.

As shown in fig. 9 and 21, the back support 4 includes an outer region 22 and a middle region 23, the outer region 22 has two side edges 24 spaced left and right, and the two side edges 24 are respectively fixedly connected to the extension member 3; specifically, the upper side portion 24a is fixedly connected to the extension member 3 in a partial region thereof, and the lower side portion 24b is suspended.

In this embodiment, the back support 4 is a ring-shaped vertical frame having a frame side 15 spaced from the left and right, the frame side 15 being a side 24 of the outer region 22, the frame side 15 is fixedly connected to the extension member 3 by first and

second screws

13, 14, the first and

second screws

13, 14 are arranged one above the other, the distance between the first screw 13 and the upper end 3a of the extension member is 1-4cm, and the vertical distance between the second screw 14 and the center 202 of the upper end of the armrest support is 10-15 cm. The two screws are arranged one above the other and are both positioned at the rear upper position of the upper end surface of the handrail support 2a, and the positions of the two screws are basically at the same height as the middle part of the back of a seated person when the seated person sits, so that the connecting and fixing positions of the screws can bear larger pressure, and the pressure of other parts of the back support 4 can be reduced.

In detail, as shown in fig. 21, the outer region 22 of the back support 4 is of longitudinally disposed annular frame-like construction, which is integrally made of thermoplastic and which is fixedly connected to the extension 3 by means of the frame sides 15 on both sides. The upper and

lower ends

15a, 15b of the two frame sides 15 are connected by a top cross member 18 and a bottom cross member 19, respectively; while the central region 23 is formed of a flexible fabric for supporting the user, it may of course be woven from a mesh material; the edges of the middle region 23 are attached to the two frame sides 15 and the top and

bottom cross pieces

18, 19.

As shown in fig. 9 and 10, the frame side 15 includes a first frame side 16 and a second frame side 17 which are arranged up and down, in this embodiment, a side upper portion 24a, i.e., the first frame side 16, and a side lower portion 24b, i.e., the second frame side 17; the first frame side 16 is fixedly connected to the extension part 3 and the second frame side 17 is in the shape of an arch protruding forward. With such a design, the first frame side 16 located above is fixedly connected with the extension part 3, so that the second frame side 17 is liberated, and the front arch design of the second frame side 17 enables the back support 4 to be provided with flexible fabrics such as mesh fabrics and the like, so that the waist of a seated person can be effectively supported; the second frame side 17 and the bottom cross-piece 19 are both flexible, the bottom cross-piece 19 can be designed as a thin sheet or plate which is forced to bend and return to its original shape when the external force is removed, while the second frame side 17 is also designed as a thin sheet or plate which is deformed by the external force in the backward direction and returns to its original shape when the external force is removed. This gives a comfortable elastic support to the waist of the human body.

More specifically, in a specific application, the second frame side 17 and the bottom cross member 19 are suspended. In the natural state, the second frame side 17 and the bottom cross-piece 19 are not connected with other parts of the seat and keep in a suspended state to form an elastic lumbar support; fig. 27 shows a schematic top view of the seat in unloaded condition, in which the second frame side 17 and the bottom cross-member 19 are arranged along the width of the back support 4, in particular in the case of the second frame side 17, which has a width substantially greater than its thickness, for example a width greater than 6 times the thickness, for example a thickness of 1.5-2.5mm and a width of 15-25 mm; when a user sits against the central region 23 with a rearward force, as shown in fig. 28, i.e. the first arrow 25 indicates the direction of the force applied to the central region 23, the second frame side 17 is torsionally deformed and drawn together towards the middle position 27 of the back support 4 in the width direction, as indicated by the second arrow 26, and at the same time the bottom cross-piece 19 is also bent and deformed, the two ends of the bottom cross-piece 19 being drawn together to assist the deformation of the second frame side 17; thus, the torsional deformation of the second frame side 17 cooperates with the central region 23 to provide a grip on both sides of the user's waist, creating a lumbar grip effect that makes the seated user feel more comfortable.

Of course, the second frame side 17 may also be designed to be rod-shaped according to the requirement, i.e. the width is substantially equal to the thickness, and at this time, the deformation of the second frame side 17 is a deformation in the left-right direction, i.e. in the width direction of the back support, and also shows a tendency of closing the waist. Regardless of whether the second frame side 17 is designed to be rod-shaped or plate-shaped, when a force is applied in the direction of the first arrow 25 as shown in fig. 28, the second frame side 17 is also elastically deformed rearward at the same time, and forms elastic support in the front-rear direction.

In still further detail, the first frame side 16 is connected to the extension 3 in the following manner: as shown in fig. 5, 9 and 10, the first frame side 16 further includes an upper section 16a and a lower section 16b, the lower section 16b is fixedly connected to the extension part 3 through the first and

second screws

13 and 14, the upper section 16a is located above the extension part 3, and two ends of the top cross member 18 are respectively connected to upper ends of the two upper sections 16 a. The position of the fixed connection of the lower segment 16b of the first frame side 16 and the extension part 3 is basically at the same height as the central position of the back of the seated person when the seated person sits, the height area is stressed intensively, and the position is designed to be the fixed connection position of the back support part 4, so that the structure is more reasonable, the second frame side 17 can be vacated and liberated, the position of the second frame side 17 is no longer used as the connection area of the chair back and the armrest as before, and various modeling designs of the second frame side 17 as the waist support are facilitated.

More specifically, the extension part 3 is provided with a notch 6 arranged longitudinally, and the notch 6 is arranged to enable the extension part 3 to form a side blocking part 7 and a rear blocking part 8; correspondingly, an engaging part 9 which is matched with the notch 6 is formed on the lower section 16b of the first frame side 16; after the buckling part 9 is matched with the notch 6, the buckling part 9 is connected with the side blocking part 7 through a first screw 13 and a second screw 14. The design ensures that the connecting part of the extension part 3 and the back support 4 has higher fitting degree and integration degree, has no obtrusive feeling and saves materials.

Of course, the first frame side 16 and the extension part 3 can also be fastened together, as shown in fig. 5, 8 and 9, the fastening portion 9 of the first frame side 16 of the back support 4 is provided with a plurality of plugs 28, and as shown in fig. 11, 12 and 15, a plurality of insertion grooves 29 are correspondingly provided at corresponding positions of the extension part 3, such as the side blocking portions 7, and the plugs 28 are inserted into the insertion grooves 29; in this case, the primary connection and positioning are achieved by means of the mating of the plug and the socket, and if this is done, the first frame side 16 and the extension part 3 may also be fixed by only one screw. Furthermore, easily conceivable ways are: the plug 28 can also be arranged on the extension part 3, while the plug-in slot 29 is arranged opposite the first frame side 16 of the back support 4.

More specifically, as shown in fig. 5 and 8, the fastening portion 9 is formed by contracting the rear end 9a of the lower section from back to front and contracting the side 9b of the lower section from outside to inside, so that a step 10 is formed at the junction of the lower section 16b and the upper section 16a, the cross section of the extension component 3 with the notch 6 is L-shaped, two screw holes 11 distributed up and down are formed on the inner side surface 7a of the side blocking portion, corresponding mounting holes 12 are formed in the side direction of the fastening portion 9, after the fastening portion 9 is engaged with the notch 6, the step 10 is abutted against the top ends 21 of the side blocking portion 7 and the rear blocking portion 8, the fastening portion 9 is abutted against the inner side surface 7a of the side blocking portion and the front end surface 8a of the rear blocking portion respectively, and the first screw 13 and the second screw 14 are screwed into the screw holes 11 respectively to achieve connection and fixation after the fastening, the design enables the screws to be mounted in the side direction of the inner side surface of the side blocking portion and the screws not to be seen from the outside, the front side and the rear side of the extension component, and the lower section 16b of the extension component can meet the aesthetic requirements of the aesthetic appearance and the requirements.

After the assembly of the seat is completed, the mesh cloth is arranged on the back support 4; when specifically using, because second frame side 17 is the shape of preceding arch, consequently second frame side 17 cooperates the screen cloth of this department to form the waist and leans on, and human waist leans on when heeling back to the waist leans on the pressure application, because second frame side 17 is unsettled setting, so can produce elastic deformation, provides the restoring force, forms effectual elastic support.

Example 2: as shown in fig. 20, the difference from embodiment 1 lies in that the handrail support 2b in this embodiment includes front and rear frame bars 2c and 2d, the upper ends of the front and rear frame bars 2c and 2d are connected to the front and rear ends of the handrail support 2a, the front and rear frame bars 2c and 2d and the handrail support 2a form a U shape with an opening facing downward, the lower ends of the front and rear frame bars 2c and 2d are fixedly connected to the seat support 1, and the extension member 3 is formed by extending upward at the intersection of the handrail support 2a and the rear frame bar 2 d. The armrest part is U-shaped and is fixedly connected with the seat supporting part 1, and the support for the arm and the back supporting part 4 can be realized.

Example 3: as shown in fig. 22, the present embodiment is different from embodiment 1 in that: the back support 4 is a flexible plate-shaped body which is integrally molded by thermoplastic plastics, connecting parts 30 are respectively formed on the upper parts 24a of the two side edges 24 of the outer area 22, and the connecting parts 30 are fixedly connected with the extension parts; when the central region 23 is subjected to a rearward force or in response to the user leaning on it, the side portions of the extension below the side attachment portions 5, i.e. the side lower portions 24b, deform and move towards the middle; the connection portion 30 and the extension member are connected in the same manner as in example 1.

Still further, a plurality of grid-shaped holes 31 are distributed over the central area 23 of the back support 4.

Example 4: as shown in fig. 23, the present embodiment is different from embodiment 1 in that: extension part 3 and back support piece 4 adopt the joint mode to link to each other, are equipped with draw-in groove 32 on extension part 3 promptly, set up on the side 24 of back support piece 4 with draw-in groove 32 joint complex connecting portion 30, behind draw-in groove 32 is gone into to connecting portion 30 card, in order to increase safety in utilization and firm in connection nature, extension part 3 and connecting portion 30 are connected to rethread screw 33.

Furthermore, the connecting portion 30 is further provided with a hook 34, and correspondingly, a clamping groove 35 matched with the hook 34 is arranged in the clamping groove 32, and the hook 34 is clamped into the clamping groove 35 by utilizing the elastic deformation of the hook 34.

Example 5: as shown in fig. 24, the present embodiment is different from embodiment 1 in that: the armrest part 2 is in a U shape with a forward opening, the armrest supporting part 2a is approximately horizontally arranged and is 15-25cm higher than the upper end surface of the seat supporting part 1 so as to conveniently support the arm of a user, and the lower end of the armrest supporting part 2b is fixedly connected with the seat supporting part 1.

Specifically, the handrail support 2b includes a rear support bar 2d disposed substantially vertically and a bottom support bar 2e disposed substantially horizontally, an upper end of the rear support bar 2d is connected to a rear end of the handrail support 2a, and a lower end of the rear support bar 2d is connected to a rear end of the bottom support bar 2 e; more specifically, for convenience of formation, the armrest support 2b and the armrest support 2a are integrally formed by using a plastic material; and the armrest part 2 is rigid.

The extension part 3 is formed by extending upwards the intersection 2g of the handrail supporting part 2a and the rear support rod 2 d; specifically, the extension part 3 is a rod-shaped part, has a simple structure, is arranged at the rear end position of the armrest part 2, and does not obstruct the support of the forearms and hands of the sitting person; and the extension part 3 is rigid and is integrally formed with the armrest part 2, so that the back support can be stably supported.

Example 6: as shown in fig. 25, the present embodiment is different from embodiment 1 in that: the armrest support 2b is substantially triangular, the rear end of the armrest support 2a is connected to the upper portion of the armrest support 2b, the extension member 3 is also connected to the upper end of the armrest support 2b, and the extension member 3 extends from the upper end of the armrest support 2b obliquely rearward and upward. The connecting position of the extension part 3 and the armrest support 2b and the connecting position of the armrest support 2a and the armrest support 2b may be the same or different.

The extension part 3 and the handrail support 2b may be fixedly connected by a fastener or may be integrally formed.

Example 7: as shown in fig. 26, the difference from embodiment 6 is: in this embodiment, the armrest support 2b is substantially inverted V-shaped, and two mounting legs 36 connected to the seat support are formed at the lower end of the armrest support 2b, and the rear end of the armrest support 2a is connected to the front side of the upper portion of the armrest support 2 b; and the extension part 3 is connected to the upper rear side of the handle support 2 b.

Of course, the extension part 3 may be connected to the armrest support 2a at the same position as the armrest support 2 b.

The above description in this specification is merely illustrative of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. An armrest having an armrest support for supporting a human arm and an armrest support bracket for connecting the armrest support to a seat support; the method is characterized in that: the back support is characterized by further comprising an extension part, one end of the extension part is fixedly connected with the handrail, the other end of the extension part extends upwards and is at least 15cm higher than the handrail support, and the part of the extension part, which is higher than the handrail support, is configured to be connected with the back support.

2. The handrail of claim 1, wherein: the extension part is a rod-shaped part and is formed by extending the rear end of the handrail support upwards.

3. The handrail of claim 2, wherein: the extension part is rigid, and the vertical height of the upper end of the extension part and the rear end of the handrail support is 15-50 cm.

4. The handrail of claim 3, wherein: the vertical height of the upper end of the extension part and the rear end of the handrail support is 20-35 cm.

5. The handrail of claim 2, wherein: the extension part is arranged in a way that the whole body is inclined backwards, and the included angle between the extension part and the plumb line is 5-20 degrees.

6. The handrail of claim 2 or 3 or 4 or 5, wherein: the extension part is gradually thinned from bottom to top.

7. The handrail of claim 1, wherein: the handrail is in a closed loop shape, and the extension part is positioned outside the closed loop.

8. The handrail of claim 7, wherein: the handrail support comprises a front support rod, a rear support rod and a bottom support rod, the upper ends of the front support rod and the rear support rod are connected to the front end and the rear end of the handrail support, and the lower ends of the front support rod and the rear support rod are connected to the front end and the rear end of the bottom support rod; the extension part is formed by extending upwards at the intersection of the handrail supporting part and the rear support rod.

9. The handrail of claim 8, wherein: the bottom bracket rod is provided with a mounting plate extending along the width direction of the handrail.

10. The handrail of claim 1, wherein: the handrail support comprises a front frame rod and a rear frame rod, the upper ends of the front frame rod and the rear frame rod are connected to the front end and the rear end of the handrail support, the front frame rod and the rear frame rod and the handrail support form a U-shaped structure, and the extension part is formed by upwards extending the intersection of the handrail support and the rear frame rod.

11. The handrail of claim 1, wherein: the handrail support is in a closed loop shape or an inverted V shape, the rear end of the handrail support is connected to the upper part of the handrail support, the extension part is also connected to the upper end of the handrail support, and the extension part is formed by extending the upper end of the handrail support obliquely backwards and upwards.

12. The handrail of claim 1 or claim 11, wherein: the extension part is fixedly connected with the handrail support through a fastener, or the extension part and the handrail support are integrally formed.

13. The handrail of claim 1, wherein: the extension part and the armrest part are integrally formed by plastic materials.

14. The handrail of claim 1 or 2 or 3 or 4, wherein: the extension part and the armrest part are approximately positioned on the same surface.

15. The handrail of claim 1, wherein: and the extension part is provided with a mounting hole matched with the back support piece for use, and the mounting hole is a through hole or a threaded hole.