JP3108001U - Multistage chair backrest structure - Google Patents

Abstract

A multi-stage chair backrest structure is provided.
A chair frame (1) has a connecting frame (1a) bent in an L-shape coupled to a chair seat at the lower end and a frame support (11) formed upward, and at each tip of the frame support (1). A plurality of holes 12 for adjusting the height in the vertical direction when connecting to the horizontal connecting member 22 of the chair back plate 2 are formed, and the chair back plate has a net surface 21 stretched in the central opening of the frame. A connecting member 23 having a separable decorative outer lid 24 is fixed to the intermediate portion of the horizontal connecting member, one end of the elastic member 25 is connected to the connecting member, and the end of the frame column is connected to both ends. The waist plate 3 is composed of a frame having a mesh surface and is pivotally supported by the lower end portion of the chair back plate. The head support portion 4 is composed of a mesh body. An elastic frame member 43 is connected to the pivot member 42 at the rear end. Resilient frame member has a structure in which the vertical direction of expansion and contraction is coupled to the support 44a of the sleeve 44.
[Selection] Figure 1

Description

  The present invention relates to a multi-stage chair backrest structure, in which an elastic frame member of a head support portion is fixed to a chair frame after a back plate is coupled and mounted, and a waist plate is provided below the backrest plate. The lower end of the waist plate is pivotably pivoted, and is supported by an elastic member connected to the back of the chair back plate, and the head support attached to the elastic frame member is movably provided. In addition, the head support part and the waist plate are both multi-stage chair backrest structures that have a cushioning effect that can be flexibly supported by changing the angle by the user's squeezing force and exhibit a comfortable squeezing effect for the user. I will provide a.

In order to improve work efficiency, chairs that are office furniture are required to be safe, convenient, and comfortable. In the design of chairs used in offices, most of the emphasis is on the backrest of the chair. Styrofoam is used to improve the hardness (density) of the backrest, and ergonomics are used. Considering the shape, it is designed to have various corresponding curves, and when the user can lean on the chair, it has a favorable support effect and exhibits a comfortable degree of drowning.
However, since the height and weight of the user who uses the chair are different from each other, the standardized office furniture cannot achieve the optimum effect corresponding to each person. Furthermore, in order to be able to completely fall into the chair, the user adjusts his / her body by stretching his / her body or bending his / her waist according to the degree of curvature of the chair, which makes his posture worse and depends on ergonomic design. Office furniture has a formal shape.

  An object of the present invention is to provide a multi-stage chair backrest structure and improve the above-mentioned problems.

  The present invention relates to a multi-stage chair backrest structure, in which one end is connected to a chair seat, a chair back plate connected to the chair frame, and a lower end portion of the chair back plate. The chair frame is composed of a pivotingly supported waist plate and a head support portion having a lower end connected to the chair frame, the chair frame being connected to a chair seating portion at the lower end and a connecting frame bent in an L shape, and both left and right sides It has a frame column formed by extending more upward, and a plurality of holes for positioning and fixing when connecting with the lateral coupling material of the chair back plate are formed at each tip of the frame column. The chair back plate is formed of a frame body, and a mesh surface 21 knitted with a flexible material is stretched at the center opening of the frame body, and a twisted portion that can be deformed according to the shape of the back of the human body Is formed, laterally connected to the left and right rear sides A connecting member having a separable outer cover is fixed to an intermediate portion of the horizontal connecting member, and one end of an elastic member is connected to the connecting member, and both ends are connected to the connecting member. The frame strut has an engagement tube through which the front end penetrates, and the waist plate is composed of a frame body having a mesh surface in an opening that can be rolled in correspondence with the waist part of the human body. An upper end portion is pivotally supported by a lower end portion of the chair back plate, and the head support portion is configured by a frame body having a mesh surface at an opening corresponding to the head of the human body, and a rear end An elastic frame member is connected to the pivot attachment member, and the elastic frame member is connected to a support column of the sleeve so as to be able to expand and contract in the vertical direction, and the sleeve is an engagement tube of a lateral connection member of the chair back plate 2. It is characterized in that it is connected and fixed to a frame column penetrating into the frame.

1) The lower back of the chair back plate of the present invention is provided with a waist plate, and the lower end of the lower back plate is supported by an elastic member connected to the back of the chair back plate. Because it has the characteristic of cushioning by rolling and swinging back and forth, the height position of the waist and the force to lean are different, exhibiting each support effect, comfort in chair use Has the effect of improving fatigue and reducing fatigue.
2) The head support part of the present invention has an elastic frame member connected and fixed to the tip of the frame support of the chair frame via the support of the sleeve, and the head support and the elastic frame member are pivotally attached. Since the movable design connected through the members is adopted, the height can be adjusted according to the sitting height of the user, and the moving angle corresponding to the head elevation angle at the time of use of the user can be handled. As a result, the multi-stage chair backrest structure of the present invention is effective in adapting to the demands of users of different body types and improving the problems that have become the bottleneck of conventional products.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  1 to 5 show an embodiment of a multi-stage chair backrest structure according to the present invention. FIG. 1 is an exploded perspective view showing the backrest part in an exploded manner, and FIGS. 2 and 3 are exploded parts of the main part. FIG. 4 is an enlarged perspective view, FIG. 4 is an overall perspective view in a state where the multistage chair backrest structure of the present invention is assembled, and FIG. 5 is a side view illustrating the operation during use.

As shown in FIG. 1, the multistage chair backrest structure of the present invention includes a chair frame 1, a chair back plate 2, a waist plate 3, and a head support portion 4.
The chair frame 1 extends upward from the left and right sides of a pair of connecting frames 1a, 1a bent in an L shape coupled to a chair seat (not shown) and a bottom seat 1b to which the connecting frames 1a, 1a are fixed. A plurality of frame struts 11, 11, each of which is positioned at the tip of each of the frame struts 11, 11 for height adjustment positioning when coupled to the lateral coupling member 22 of the chair backboard 2. A hole 12 is formed.

  The chair back plate 2 is formed of a substantially rectangular frame 2a as a whole, and a mesh surface 21 knitted with flexible bamboo, rattan, plastic or metal fine wire is stretched at the central opening of the frame, A bendable portion that can be deformed corresponding to the shape of the back of the human body is formed.

  A lateral connecting member 22 is connected to the left and right rear sides near the lower end of the frame 2a. A circular connecting member 23 having a separable decorative outer lid 24 is fixed to an intermediate portion of the lateral connecting member 22, and an elastic member described later is attached to the connecting member 23. 25 are connected. As shown in FIG. 2, the circular connecting member 23 disposed in the intermediate portion of the horizontal connecting member 22 is screwed 221 through a through hole 222 formed in the central mounting portion of the horizontal connecting member 22. The screw hole 231 of the connecting member 23 is fixed. A makeup outer cover 24 is fixed to the opening side of the connecting member 23. The decorative outer cover 24 is fixed to the connecting member 23 by fitting a fixing pin 241 formed on the decorative outer cover 24 into a fixing hole 233 provided in the connecting member 23. .

Further, the connecting member 23 has an opening in the center of the lower surface thereof in which an end portion of an elastic member 25 having one end fixed to the horizontal member 32 of the waist plate 3 is installed, and the connecting member 23 and the elastic member They are fixed to each other by screws 251 through screw holes 232 and 252 formed in the member 25. Furthermore, the left and right ends of the lateral connecting member 22 have engaging pipes 26 having openings in the vertical direction, and the ends of the frame columns 11, 11 penetrate from the bottom surface side of the engaging pipe 26, and the frame The front ends of the columns 11 are fitted and connected to the lower end of the sleeve 44 of the head support 4.
The elastic member 25 employs a metal material such as steel coated with plastic to increase the elastic force, and the plastic surface has a wave surface to improve the elastic effect.

  The waist plate 3 is formed of a substantially rectangular frame 3a as a whole, and a network surface 31 knitted with flexible bamboo, rattan, plastic, or metal thin wire is stretched at the central opening of the frame 3a, and the human body. A bendable portion that can be deformed is formed corresponding to the shape of the lower back. As shown in FIG. 3, the waist plate 3 is pivoted to penetrate through connecting projections 2b and 3b having through holes in the left and right direction formed in the lower part of the frame 2a of the chair back plate 2 and the waist plate frame 3a. The pin 32 is pivotally supported so as to swing.

  The head support portion 4 is formed of a substantially rectangular frame 4a which is smaller than the chair back plate 2 and the waist plate 3, and has a flexible bamboo, rattan, A net surface 41 knitted with plastic or metal thin wire is stretched to form a bent portion that can be deformed in accordance with the shape of the human head. The head support portion 4 has one end of a substantially inverted L-shaped elastic frame member 43 attached to a pivot member 42 provided at the center of a horizontal member 44 provided at the left and right center of the rear side of the frame 4a. The other end of the sleeve 44 is fitted and connected to the support 44a of the sleeve 44. The lower end of the sleeve 44 divided into left and right forks is the frame support 11 and 11 passing through the engagement pipe 26 of the lateral connection member 22, respectively. Each front-end | tip part is connected.

  In assembling the multistage chair backrest structure of the present invention configured as described above, first, the front ends of the frame columns 11, 11 of the chair frame 1 are passed through the engagement pipe 26 of the chair back plate 2. A pin is inserted into and locked in the plurality of holes 12, and the waist plate 3 is swingable by a pivot pin 32 penetrating the connecting projections 2b and 3b below the frame 2a of the chair back plate 2. Next, one end of the elastic member 25 is pivotally supported on the horizontal member 32 of the waist plate 3, and the other end is screwed through screw holes 232 and 252 formed in the connecting member 23 and the elastic member 25. 251 are fixed to each other. Finally, the backrest is configured by fitting and connecting to the front ends of the frame columns 11 and 11 of the chair frame 1 protruding through the engagement tube 26 and the sleeve 44 of the head support portion 4 (FIG. 4). As shown in FIG.

  In the use of the multistage chair backrest structure of the present invention, the connecting frames 1a and 1a of the chair frame 1 are assembled to the chair by being coupled to the chair seat, and penetrated through the engagement tube 26 of the chair back plate 2. The height position can be adjusted corresponding to the positions of the plurality of holes 12 formed on the upper (tip) side of the support frames 11, 11, and the elastic frame member 43 of the head support portion 4 is also provided on the sleeve 44. It is possible to adjust the expansion and contraction in the vertical direction between the support 44a and the back plate 2 and the head support 4 can be adjusted according to the body shape of the user.

When the user sits down on the chair and falls back, the back of the chair back plate 2 supports the back portion, and the waist plate 3 is also buffered via the elastic member 25 by the force of the user's waist. Since the waist plate 3 has a force and is opposed to the back plate 2 and the angle can be biased back and forth, the difference in the height of the waist and the force to lean can provide a suitable bearing effect.
Further, the head support portion 4 has a structure of an elastic frame member 43 and a pivot attachment member 42 so as to be slid according to the head elevation angle when the user uses the head support portion 4. Therefore, the multistage chair backrest structure of the present invention can meet the demands of users of various different body types, improve comfort, and reduce fatigue.

  In the present invention, preferred embodiments have been disclosed as described above. However, these are not intended to limit the present invention, and any person who is familiar with the technology can use various methods within the spirit and scope of the present invention. Improvements and changes can be made, and all the contents described in the claims of the utility model registration of the present invention belong to the scope of rights of the present invention.

The exploded perspective view which shows one Example of the multistage chair backrest structure of this invention, and decomposes | disassembles and shows a backrest part FIG. FIG. The overall perspective view in a state where the multistage chair backrest structure of the present invention is assembled, It is a side view showing operation explanation at the time of use.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Chair frame 11 ... Support | pillar frame 12 ... Hole 2 ... Chair back plate 21 ... Mesh surface 22 ... Horizontal connection material 221 ... Screw 222 ... Through-hole 23 ... Connection member 231 ... Screw hole 232 ... Screw hole 233 ... Fixing hole 24 ... Outer cover 241 ... Bar 25 ... Elastic member 251 ... Screw 252 ... Screw hole 26 ... Engagement tube 3 ... Lumbar plate 31 ... Mesh surface 32 ... Pivoting pin 33 ... Pivoting member 4 ... Head support portion 41 ... Mesh surface 42 ... Pivoting member 43 ... Elastic frame member 44 ... Sleeve

Claims (1)

The present invention relates to a multistage chair backrest structure, which is pivotally supported by a chair frame having one end connected to a chair seat, a chair back plate connected to the chair frame, and a lower end portion of the chair back plate. It consists of a waist plate and a head support part whose lower end is connected to the chair frame,
The chair frame has a connection frame bent in an L shape coupled to a chair seat at the lower end, and a frame column formed by extending upward from the left and right sides, and at each tip of the frame column. Are each formed with a plurality of holes for adjusting the height in the vertical direction when connecting with the lateral connecting material of the chair back plate,
The chair backboard is formed of a frame body, and a mesh surface 21 knitted with a flexible material is stretched at the center opening of the frame body, and a bent portion that can be deformed corresponding to the shape of the back of the human body is provided. A connecting member having a separable decorative outer lid is fixed to an intermediate portion of the horizontal connecting member formed between the left and right rear sides, and one end of an elastic member is connected to the connecting member, And it has an engagement pipe which the tip of the frame support penetrates at both ends,
The waist plate is configured by a frame body having a mesh surface at an opening that can be turned in correspondence with a waist portion of a human body, and an upper end portion of the frame body is pivotably supported with a lower end portion of the chair back plate. Has been
The head support portion is configured by a frame having a mesh surface at an opening corresponding to the head of a human body, and an elastic frame member is connected to a pivot member at a rear end, and the elastic frame member is a support of a sleeve. A multi-stage type wherein the sleeve is connected and fixed to a frame column penetrating through an engaging tube of a lateral connecting material of the chair back plate. Chair backrest structure.