WO2004037047A1 - Structure de dossier de chaise - Google Patents

Structure de dossier de chaise Download PDF

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Publication number
WO2004037047A1
WO2004037047A1 PCT/JP2003/012919 JP0312919W WO2004037047A1 WO 2004037047 A1 WO2004037047 A1 WO 2004037047A1 JP 0312919 W JP0312919 W JP 0312919W WO 2004037047 A1 WO2004037047 A1 WO 2004037047A1
Authority
WO
WIPO (PCT)
Prior art keywords
back plate
back frame
frame
plate
bending
Prior art date
Application number
PCT/JP2003/012919
Other languages
English (en)
Japanese (ja)
Inventor
Takashi Nakamura
Original Assignee
Kokuyo Furniture Co.,Ltd.
Takano Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2002299697A external-priority patent/JP4185754B2/ja
Priority claimed from JP2002299716A external-priority patent/JP2004129966A/ja
Application filed by Kokuyo Furniture Co.,Ltd., Takano Co., Ltd. filed Critical Kokuyo Furniture Co.,Ltd.
Priority to AU2003272952A priority Critical patent/AU2003272952A1/en
Publication of WO2004037047A1 publication Critical patent/WO2004037047A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/46—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs
    • A47C7/462—Support for the head or the back for the back with special, e.g. adjustable, lumbar region support profile; "Ackerblom" profile chairs adjustable by mechanical means

Definitions

  • the present invention relates to a chair backrest structure. More specifically, the present invention relates to an improvement in a back plate supporting structure that allows the shape of the backrest to be deformable.
  • this backrest structure has a back support rod 101, which is elastically deformable in the front-rear direction and is supported by a shaft 103. 0 4 is provided, and the lower end of the back plate 102 is displaced to the back support rod 101 by inserting the pin 105 attached to the lower end of the back plate 102 into the long hole 104. It is connected as much as possible.
  • a spring 106 for urging the back plate 102 forward is provided between the back support rod 101 and the back plate 102.
  • the back plate 102 cannot be bent significantly. For this reason, the back support rod 101 could not be tilted backwards slightly while the back plate 102 was largely bent. Further, unless the seated person leans on the backrest, the backboard 102 cannot be bent and maintained in that state. In other words, the chair could not be used with the bending angle of the back plate 102 set to the desired angle.
  • this backrest support structure is designed so that The back plate 206 is made of a flexible material such as resin, or a slit is formed in the middle of the back plate 206 because it is rigidly supported at both ends of the back plate 206. Even if the back plate 206 is easily deformable, it can be deformed in the front-back direction (the depth direction of the chair), but the center of the backrest is centered on the axis passing in the longitudinal direction (mainly the vertical direction) It is impossible to impart torsion or deformation to the backboard 206, and it is difficult to deform the backboard 206 according to the posture of the seated person with the torsion.
  • An object of the present invention is to provide a chair backrest structure that can use a chair in a state where a bending angle of a backboard is set to a desired angle. Further, an object of the present invention is to provide a backrest structure of a chair capable of satisfactorily deforming a backboard according to a posture of a seated person.
  • the backrest structure of the present invention includes a lower back plate fixed to the first back frame, an upper back plate tiltable in the front-rear direction, a bending angle adjustment mechanism, and a lower end of the first back frame.
  • a second back frame the upper end of which can be tilted in the front-rear direction around the connection point, and a connection connecting the upper end of the second back frame to the upper part of the back plate while absorbing these relative displacements Means, a connecting point force between the first back frame and the second back frame, and a displacement means provided at a remote position to change a distance between the first back frame and the second back frame. It is provided with.
  • the bending angle of the backboard can be adjusted by operating the displacement means, and the bending angle of the backboard can be adjusted to a desired angle by a simple adjustment operation.
  • the mechanism since the relative displacement generated between the upper end of the second back frame and the second back frame connecting portion of the back plate can be absorbed by the connecting means, the mechanism can be established.
  • the backrest structure of a chair according to the present invention includes a deformable backplate and at least one back support member at least a portion connected to the backplate is formed of a flexible resin. is there. Therefore, when the occupant leans on the back plate, the back support member flexes according to the magnitude, direction, and position of the applied load, and the back plate is easily deformed. The back plate is deformed, so that the leaning comfort can be improved.
  • the backboard By deforming and tilting the upper part of the backboard in the front-back direction with respect to the lower part of the backboard, the backboard can be bent as a whole, and at least the upper part of the backboard can be deformed, and the second back frame can be used. It is made of flexible resin It is.
  • the second back frame tilts the upper part of the backboard, so that the backboard can be bent in the front-rear direction around the backboard bending area.
  • the back plate is easily deformed with a radius depending on the magnitude, direction, and position of the load applied to the second back frame, and the back plate follows the posture of the seated person and is deformed with twisting or locally. Easy to deform. Therefore, the leaning comfort can be improved.
  • the second back frame bends easily according to the magnitude, direction, and position of the applied load, so that the deformable back plate is easily deformed.
  • the bending angle adjusting mechanism by operating the bending angle adjusting mechanism, the bending angle in the front-rear direction around the bending region of the backboard can be adjusted to a desired angle. If the bending angle of the backboard is adjusted to the desired angle and the bending angle is fixed, the bending angle of the backboard is maintained by the bending angle adjustment mechanism even if the occupant leans strongly against the backboard.
  • the bending angle of the back plate can be adjusted by operating the displacement means, and the bending angle of the back plate can be adjusted to a desired angle by a simple adjustment operation.
  • the mechanism can be established.
  • the displacement means includes a first back frame and a second back frame. An adjusting screw provided on one of the back frames, a female screw member provided on one of the other sides and having a screw hole into which the adjusting screw is inserted, and an angle of at least one of the adjusting screw and the female screw member in a vertical direction. It is provided with angle changing means for changing.
  • the screwing amount of the female screw member into the screw hole changes. Therefore, the distance between the first back frame and the second back frame at a position apart from the connection point between the first back frame and the second back frame changes, and the tilt angle of the second back frame changes. And the bending angle of the backboard changes. That is, the bending angle of the back plate can be adjusted by rotating the adjusting screw.
  • the opposing angle between the adjusting screw of the displacement means and the screw hole also changes, but this change is absorbed by the angle change means, so the displacement No excessive force is generated in the means, light! / Can be operated by force.
  • the connecting means includes a shaft portion having a circular contour formed at least at an upper end of the second back frame; A shaft receiver having an inlet formed therein, and a member provided above the shaft receiver and defining a space for allowing movement of the tip of the shaft portion. Things.
  • the second back frame is moved. Absorbs relative displacement in the axial direction of one meter.
  • the shaft portion makes a razor movement with respect to the entrance, thereby absorbing a vertical angle change and a horizontal angle change between the second back frame and the back plate. Further, the rotation of the shaft with respect to the shaft receiver absorbs a change in the horizontal angle between the second back frame and the back plate. As a result, the degree of freedom of movement of the connecting portion between the second back frame and the back plate can be improved. In addition, the number of components is reduced, and the number of manufacturing processes is accordingly reduced, so that manufacturing costs can be reduced.
  • the shape of the slit is at least a shape protruding in one direction, for example, a U-shape
  • a part of the back plate can be protruded to form the support portion.
  • the back plate bending area is intentionally formed to enable bending of the back plate at an arbitrary position.However, in some cases, a region where the back plate is bent and deformed is also included, and the back plate is fixed. It is formed between the portion and the connecting portion.
  • the backrest structure of the chair according to the present invention is further characterized in that a support member for assisting the backrest is rotatably attached to the upper end of the backboard, and the support member and the first back frame are connected by a link, thereby bending the backboard.
  • the support member is rotated in conjunction with. Therefore, even if the occupant leans against the backboard and takes a posture in which the head is raised, the head and the like can be supported by the support member. For this reason, the usability of the chair can be improved.
  • the resin is glass-filled nylon.
  • FIG. 1 is a sectional view showing an embodiment of a backrest structure of a chair according to the present invention.
  • Fig. 2 is a cross-sectional view showing the backrest structure of the chair, with the backboard bent significantly.
  • Fig. 3 is a rear view showing the back plate of the backrest structure of the chair.
  • Fig. 4 shows the connecting means of the backrest structure of the chair, and is a cross-sectional view seen from above.
  • Fig. 5 shows the connecting means and is a cross-sectional view from the side.
  • Fig. 6 is a cross-sectional view showing a first example of a displacement means of the backrest structure of the chair.
  • Fig. 7 shows the same displacement means, and is a cross-sectional view of the back plate with the back plate bent significantly.
  • FIG. 16 is a sectional view showing a third example of the displacement means of the backrest structure of the chair.
  • Fig. 17 shows a third example of the displacement means, and is a cross-sectional view of the state where the back plate is greatly bent.
  • Fig. 18 is a sectional view showing a fourth example of the displacement means of the backrest structure of the chair.
  • Fig. 19 shows a fourth example of the displacement means, and is a cross-sectional view of the back plate with the back plate largely bent.
  • FIG. 20 is a side view showing a first modification of the backrest structure of the chair of the present invention.
  • Fig. 20 is a side view showing a first modification of the backrest structure of the chair of the present invention.
  • FIG. 27 shows the use state of the chair to which the backrest structure of Fig. 26 is applied, and shows how the chair is used by children.
  • Fig. 28 shows the use of the chair to which the backrest structure of Fig. 26 is applied, showing how an adult uses it.
  • Fig. 29 shows a fifth embodiment of the backrest structure of the chair to which the present invention is applied, and is a cross-sectional view showing a state where the headrest is moved rearward.
  • Fig. 30 shows a fifth embodiment of the backrest structure of the chair, in which the headrest is moved forward.
  • FIG. Fig. 31 shows the use state of the chair to which the backrest structure of Fig. 29 is applied, in which the headrest is moved backward.
  • Fig. 32 shows the use state of the chair to which the backrest structure is applied, in which the headrest is moved forward and the entire backrest is reclined.
  • Fig. 33 is a rear view showing the slits on the back plate with steps.
  • Fig. 34 is a rear view showing the appearance of two slits on the back plate.
  • Fig. 35 is a rear view showing a single slit in the back plate.
  • Fig. 36 is a cross-sectional view showing another embodiment of the connecting means constituting the backrest structure of the chair to which the present invention is applied.
  • Fig. 37 is a conceptual diagram for explaining the shape of the insertion port and the movement of the projection.
  • FIG. 38 is a sectional view showing still another embodiment of the connecting means constituting the backrest structure of the chair to which the present invention is applied.
  • Fig. 39 shows a sixth embodiment of the backrest structure of the chair according to the present invention, which is provided with a support member for supporting from the scapula portion of the seated person to the head as a support member. It is a figure of the state where it is moving back.
  • FIG. 40 shows a sixth embodiment of the backrest structure, in which the support body is moved forward and the entire backrest is reclined.
  • Fig. 41 is a perspective view showing how the upper part of the backboard is twisted and deformed.
  • Fig. 42 is a perspective view showing how the center of the back plate is deformed so as to protrude backward.
  • Fig. 41 is a perspective view showing how the upper part of the backboard is twisted and deformed.
  • Fig. 42 is a perspective view showing how the center of the back plate is deformed so as to protrude backward
  • FIG. 43 is a perspective view showing how the back plate is deformed so that one side protrudes backward.
  • FIG. 44 is a schematic configuration diagram of a first back frame, a back plate, and a second back frame showing a seventh embodiment of the backrest structure of the chair of the present invention.
  • Fig. 45 shows a seventh embodiment of the backrest structure of the chair of the present invention, and is a schematic configuration diagram of the first back frame, the back plate, and the second back frame with the back plate reclining. is there.
  • Fig. 46 is a side view showing the backrest structure of a conventional chair.
  • Fig. 47 is a side view showing the backrest structure of another conventional chair.
  • One of the upper back plate 2a and the lower back plate 2b is fixed to the first back frame 1, and the other is supported by the second back frame 5, and the back plate bending area 2e
  • the back plate 2 By tilting the upper back 2a or the lower back 2b in the front-back direction with respect to the lower back 2b or the upper back 2a, the back plate 2 can be bent as a whole. I have.
  • the back plate lower portion 2b is fixed to the first back frame 1, and the back plate upper portion 2a is connected to the second back frame 5 so as to be able to be linked in the front-rear direction.
  • the back plate bending region 2e is deformed so that the back plate 2 can be bent around the bending region 2e.
  • the mounting relationship of the back plate 2 to the back support member 61 is not limited to the above embodiment, and the upper portion 2a of the back plate is fixed to the first back frame 1 and the lower portion 2b of the back plate 2
  • the support frame 2 may be supported by the back frame 5.
  • the back support member 61 for supporting the backrest in the backrest structure of the present embodiment is composed of two side plates 1 d swingably mounted on the seat member 8 and a back plate mounting wall 1 f and a reinforcing plate 1.
  • One first back frame 1 connected and integrated with g, etc., and two rigid rod-like rods such as steel pipes that are attached to the side plate 1 d of the first back frame 1 so as to be tiltable.
  • It is composed of one second back frame 5 in which objects are connected by connecting plates 11 and 12 and integrated.
  • This second back frame 5 , connecting means 6 for connecting the upper end of the second back frame 5 to the upper part 2a of the back plate, and a position away from the connecting pin 4 And a displacement means 7 for connecting the first back frame 1 and the second back frame 5 to change the distance between the first back frame 1 and the second back frame 5 in the first embodiment. 3 are configured.
  • the first back frame 1 is attached to the seat receiving member 8 so as to be tiltable.
  • the lower back 2b of the back plate 2 is fixed to the first back frame 1.
  • the first back frame 1 is swingably attached to the seat receiving member 8 by a connecting pin 8 1 so that the back plate 2 is always erected by a reaction force unit 8 3 mounted on the seat receiving member 8.
  • the seat receiving member 8 has a long hole 85 at the distal end side, and a shaft 84 is passed through the long hole 85 to support the seat 9 so as to be able to move back and forth.
  • the rear end of the seat 9 is hooked on a shaft 82 penetrating the back support member 61 and is supported by the back support member 61. Therefore, the seat 9 moves back and forth with the tilt of the back support member 61, and sinks or lifts the rear side.
  • the back plate 2 is made of, for example, a flexible material.
  • the back plate 2 is formed of, for example, a resin such as polypropylene or nylon.
  • the resin used as the material of the back plate 2 is not limited to these, and the back plate 2 may be formed of a material other than the resin.
  • the back plate 2 is made to be bendable by being made of a flexible material such as resin, but the back plate upper portion 2a and the back plate lower portion 2b of the back plate 2 are formed as separate members.
  • the back plate 2 may be bendable by connecting the back plate upper portion 2a and the back plate lower portion 2b with a hinge or the like. In this case, the hinge is the back plate bending area 2 e.
  • the hinge is, for example, integrally formed with the upper back plate 2a and the lower back plate 2b of the back plate 2, and is more flexible than the resin used as the material of the upper back plate 2a and the lower back plate 2b. It is possible to apply a resin hinge formed by using a certain resin, and it is formed integrally with the back plate upper part 2a and the back plate lower part 2b of the back plate 2, and the back plate upper part 2a and the back plate lower part 2b It is possible to apply a hinge that has flexibility by making it thinner.
  • the slit 10 is formed to be easily deformed, and the upper part 2a of the backboard above the bending area 2e or the lower part 2b of the lower backboard is tilted in the front-back direction about the bending area 2e.
  • the bending region 2 e is a region between a portion where the back plate 2 is fixed to the first back frame 1 and a portion where the back plate 2 is connected to the second back frame 5. More specifically, the bending region 2 e is a region near the hinge that functions similarly to the slit 10 ⁇ slit 10, and is generally represented by Figs. 3, 33, and 3. 4. In the range indicated by the imaginary line in Fig. 35, it is the area where positive elastic deformation is presumed.
  • the bent region 2e is intentionally formed to allow the back plate 2 to bend at an arbitrary position, but may include a region which is bent as a result in some cases.
  • the shape of the slit 10 when the shape of the slit 10 is U-shaped and the tongue piece 2c is formed, that is, when the tongue piece 2c is projected downward, When the upper part of the plate 2 is inclined backward and bent, the tongue piece 2c can be projected forward, and the protruded tongue piece 2c can support the waist of the occupant.
  • the shape of the slit 10 may be linear, or the bent area 2e may be continuous. It is composed of typical resin hinges. That is, by making the shape of the slit 10 linear, it is possible to prevent a part of the back plate 2 from projecting even if the back plate 2 is bent.
  • the second back frame 5 is fixed to the first back frame 1 with the bending area 2 e as a boundary.
  • the back plate portion 2a above the bending region 2e is rotatably and slidably connected to the back plate 2 at the back plate portion opposite to the side of the back plate. It supports 2a.
  • a circular pipe is employed as the second back frame 5, and two second back frames 5 are provided on the left and right sides, for example, so as to support both ends in the width direction (horizontal direction) of the back plate 2. .
  • the second back frame 5 is connected by two connecting plates 11 and 12.
  • the number of the second back frames 5 is not limited to two, but may be one or three or more.
  • the center of the back plate 2 may be supported, or a T-shape may be used to support both ends of the back plate 2.
  • the left and right pipe second back frames 5 are connected by two connecting plates 11 and 12.
  • one connecting plate requires at least rigidity as the second back frame 5. May be connected.
  • the second back frame 5 is formed of a circular pipe material, but may be a solid rod material or, in some cases, a square pipe or a square material.
  • the connecting means 6 includes a shaft 13 having a circular contour formed at least at the upper end of the second back frame 5, and a shaft rotatable relative to the shaft 13.
  • a connecting part 14 slidable in the direction is provided, and a shaft support means 15 for rotatably attaching the connecting part 14 to the back plate 2 around a horizontal axis.
  • the second back frame 5 is a pipe having a circular cross section
  • the upper end of the second back frame 5 forms the shaft portion 13.
  • the connecting portion 14 is a cap (hereinafter, referred to as a cap 14) having a circular inner peripheral surface that is fitted into the shaft portion 13 with a slight gap.
  • the connecting portion 14 is not limited to the cap, and may be, for example, a ring or the like. It may be.
  • the outer peripheral shape of the shaft portion 13 and the inner peripheral surface shape of the connecting portion 14 do not have to be circular in a strict sense, and rotation can be allowed in a movable range required between them. Any shape is sufficient.
  • the shaft support means 15 is rotatably connected to a bracket 14a fixed to the cap 14 and a bracket 2d fixed to the back plate 2 through these brackets 2d and 14a. This is a hinge joint composed of a shaft 16 to be mounted.
  • the cap 14 is fitted into the shaft 13 from above.
  • the cap 14 is rotatable with respect to the shaft 13 and slidable in the axial direction.
  • the cap 14 has such a length that it does not fall off the shaft portion 13 within the range of movement of the second back frame 5. That is, even if the cap 14 slides with respect to the shaft portion 13 due to the tilting of the second back frame 5 and the bending of the back plate 2, the cap 14 does not come off from the shaft portion 13.
  • the displacement means 7 includes an adjusting screw 17 provided on one of the first back frame 1 and the second back frame 5, and a female screw member 21 provided on the other.
  • the female screw member 21 has a rod shape, has a screw hole 18 into which an adjusting screw 17 penetrating in the radial direction is screwed, and is disposed so as to be orthogonal to the adjusting screw 17.
  • the female screw member 21 and the adjusting screw 17 are attached to the first back frame 1 and the second back frame 5 so as to be adjustable in angle.
  • an adjusting screw 17 is attached to the connection plate 12 that connects the second back frame 5, and a female screw member 21 is provided on the first back frame 1.
  • the adjusting screw 17 is opened to the connection plate 12 having a slightly larger diameter or a longer hole (longer in the height direction of the backrest) than the adjusting screw 17 via the thrust bearing 20. It is attached to the connecting plate 12 so as to be rotatable, tiltable and adjustable in position, and not fall off by passing through a hole (not shown). Further, the female screw member 21 is disposed between the side plates I d and 1 d protruding from the back plate mounting wall 1 f of the first back frame 1, and both ends thereof are connected to the side plates 1 d of the first back frame 1. , Id and are screwed and supported on coaxial screws 22 and 22.
  • the screws 22 pass through through holes 1 e formed in the side plate 1 d of the first back frame 1 and are screwed into screw holes formed at both ends of the female screw member 21. Therefore, the female screw member 21 is
  • the first back frame 1 is rotatably supported on the screw 22 by angle changing means 19 rotatably supported by the screw 22 and the side plate 1d.
  • the screw hole 18 penetrates the center of the female screw member rod 21 in the radial direction.
  • a stop disk 23 is attached at the tip of the adjusting screw 17 screwed into the screw hole 18, so that the adjusting screw 17 does not come out of the screw hole 18.
  • An operating lip 43 is fixed to an end of the adjusting screw 17, and is provided so as to rotate the adjusting screw 17 using the grip 43.
  • the bending angle of the back plate 2 can be adjusted to a desired angle as described below.
  • the backrest structure of the present invention when the occupant leans against the backboard 2 and tilts the backboard 2 with respect to the seat receiving member 8, that is, a force for rotating the adjustment screw 17 even during reclining. Since the bending does not occur, the bending angle of the back plate 2 does not change during use.
  • the occupant can adjust the bending angle of the backboard 2 to a desired angle by operating the adjustment screw 17, and can use the chair with the backboard 2 bent at the desired angle.
  • the usability of the chair can be improved.
  • it is easy to rotate the adjusting screw 17 and the adjusting work is also simple. This also improves the usability of the chair.
  • the chair with the bending angle of the backboard 2 increased for example, when the first back frame 1 is tilted and the entire backrest is reclined, the back muscles can be further extended, A better stretching effect can be obtained.
  • the length of the gas spring 24 is fixed or released by opening and closing a release valve that prevents the flow of the working gas by operating the lever 25.
  • This lever 25 is located in the space below the side edge of the backboard 2 so that the occupant does not bend forward, and can be grasped simply by lowering his hand with his back on the backboard 2. It can be operated as it is. Therefore, it is easy to perform the lever operation, and it is also easy to perform the operation of pushing the back plate 2 with the back while operating the lever 25.
  • the gas spring 24 is linked from the valve operation part to the left and right direction of the chair. By extending 26, the lever 25 can be directly attached to the link 26, and a reasonable arrangement can be adopted. In other words, the gas spring 24, the link 26, the wrapper 25, and the like can be assembled to the chair in a previously assembled state, and the chair can be easily assembled.
  • the relative displacement generated between the upper end of the second back frame 5 and the link connecting portion of the back plate 2 can be absorbed by the connecting means 6, so that the second back frame 5 is A mechanism for bending the back plate 2 by tilting can be established. Also, since no excessive force acts on the connection between the second back frame 5 and the back plate 2, the back plate 2 can be moved smoothly, and the back plate 2 can be bent with a light force. And the feel is better. Furthermore, since an excessive force is prevented from acting on the connecting portion between the second back frame 5 and the back plate 2, it is possible to prevent damage and wear of members and components due to stress concentration, and to prolong the product life. it can. In addition, the degree of freedom in the selection of materials for each member and part, and the degree of freedom in the combination of materials between sliding and contacting parts and parts are improved. Can be
  • the back plate 2 of the present embodiment made of a flexible material has a structure in which the cap 14 rotates with respect to the shaft portion 13 so that, as viewed from above, as shown in FIG. It becomes easy to curve the back plate 2 so that the center of the back plate 2 projects rearward. That is, when the occupant leans on the back plate 2, the back plate 2 is easily curved in accordance with the shape of the back. Therefore, the sitting comfort can be further improved.
  • cover 28 To attach the cushioning material 27 covered with the force par 28 to the back plate 2, first, pass the cover 28 to the tongue piece of the back plate 2 through the slit 10 of the back plate 2. After covering over 2c from below, it is sufficient to cover the upper edge of the back plate 2 while turning over the upper folded portion 28a. At this time, cover 28 covers pocket 28b on tongue 2c of backboard 2 so that it can be hooked, and then extends upward while pulling back folded part 28a of backboard 2. It can be attached by putting it on the upper end. Also, since the folded part 28a of the force par 28 is placed on the upper edge of the back plate 2 and the bocket 28b is placed on the tongue piece 2c, the cover 28 is left and right with respect to the back plate 2. There is no deviation in the direction.
  • the cover 28 for storing the cushioning material 27 when the cover 28 for storing the cushioning material 27 is attached to the back plate 2, the cover 28 is fixed to the back plate 2 with a pin or a hook-and-loop fastener. (The so-called magic tape).
  • a folded part 28 a was provided on the upper edge of the cover 28 to cover the upper edge of the back plate 2, but even in this case, the lower part of the cover 28 was pinched using pins or hook-and-loop fasteners. It was stopped on board 2. Therefore, in the conventional method, it was troublesome to attach the force par 28 containing the cushioning material 27 to the back plate 2, and the workability was poor.
  • the color of the back plate 2 and the color of the cover 28 can be different so that the folded part 28
  • the a and the boket part 28b become components on the design, making it a design that has never existed before, and can be differentiated from other types of chairs.
  • the pocket 28b can be used as a pocket for storing small items such as a mobile phone.
  • the back plate 2 is formed of a material or a structure that can be deformed in any direction, and the second back frame 5 is formed as a flexible structure. May be.
  • the back plate 2 is made of a resin such as polypropylene or nylon similarly to the above-described embodiment. Further, at least a portion of the second back frame 5 connected to the back plate 2 is formed of a flexible resin.
  • the resin forming the second back frame 5 is preferably a resin filled with a reinforcing material such as glass fiber or carbon fiber, but the back plate 2 is satisfactorily deformed according to the posture of the occupant.
  • a reinforcing material such as glass fiber or carbon fiber
  • the back plate 2 is satisfactorily deformed according to the posture of the occupant.
  • the back plate 2 is satisfactorily deformed according to the posture of the occupant.
  • the back plate 2 is preferably a resin filled with a reinforcing material such as glass fiber or carbon fiber, but the back plate 2 is satisfactorily deformed according to the posture of the occupant.
  • a reinforcing material such as glass fiber or carbon fiber
  • the fork branches above the connection point of the second back frame 5 by the connection plate 11.
  • the arm with the stronger weight of the occupant has a larger radius, and the arm with no weight acts on the back plate 2 due to the deformation of the back plate 2. Is pulled forward. That is, as shown in Fig. 41, the back plate 2 is deformed so that the upper end of the back plate 2 is twisted about the center line 59 of the back plate 2.
  • the arm portion of the second back frame 5 bends, it is difficult to hinder the deformation of the back plate 2, and the back plate 2 can be largely deformed into a shape that follows the posture of the seated person.
  • the two arms of the second back frame 5 bend inward.
  • the center of the back plate 2 is greatly curved so as to protrude backward. That is, since the arm portion of the second back frame 5 bends, it becomes difficult to hinder the deformation of the back plate 2, and the back plate 2 can be largely deformed into a shape that follows the posture of the seated person. Furthermore, as shown in Fig.
  • the first back frame 1 in addition to the second back frame 5 may be formed of a flexible resin such as nylon reinforced with glass fiber or the like.
  • the back plate 2 is more easily deformed than when only the second back frame 5 is formed of a flexible resin, and in particular, as shown in FIG. This is effective when the plate 2 is torsionally deformed.
  • at least a portion connecting the back plate 2 of the second back frame 5 is formed of a flexible resin so that the deformation of the back plate 2 is not hindered. Therefore, the degree of freedom of deformation of the back plate 2 can be increased with a simple structure, and the number of parts does not increase.
  • the mounting structure of the cushion material 27 can be applied to the back plate 2 provided with the slit 10 and forming the tongue piece portion 2c irrespective of the structure of the back support member 61. .
  • the pocket portion 28b may be opened downward.
  • the slit 10 is formed in an inverted U shape so that the tongue piece 2c is formed upward.
  • the connecting means 6 includes the shaft portion 13, the cap 14, and the shaft supporting means 15, but the configuration is not necessarily limited to this.
  • the link bracket is attached to the upper end of the second back frame 5.
  • a slot 31 is provided along the axial direction of the second back frame 5
  • a back plate side bracket 32 is fixed to the back plate 2, and a long A pin 33 passing through the hole 31 may be attached.
  • the connecting means 6 includes a shaft portion 51 having a circular contour formed at least at an upper end of the second back frame 5 and a back surface of the back plate 2.
  • a member 55 that defines a space 54 that allows the movement of the tip of 51 may be provided.
  • a box (hereinafter referred to as a box 55) is formed on the back of the back plate 2 as the member 55, and the bottom wall of the box 55 is a bearing 53, a box.
  • the interior space of 55 is defined as space 54.
  • the structure for forming the bearing 53 and the space 54 is not limited to the box 55.
  • Fig. 37 shows the concept of the insertion port 52.
  • the opening of the insertion opening 52 is formed with a conical surface extending toward the inside of the shaft portion bearing 53 and to both surfaces on the front side. For this reason, it is easy for the shaft 51 inserted into the inlet 52 to make a razor movement with respect to the shaft bearing 53, and the relative position between the back plate 2 and the second back frame 5 is increased. The degree of freedom of movement is improved as compared with the combination of the cap 14 and the shaft 13 of FIG.
  • the shaft supporting means that is, the hinge 15 required for the connecting means 6 shown in FIG. 5 can be omitted.
  • the structure is simpler than that shown in Fig. 5, and the number of parts can be reduced, and the number of manufacturing processes can be reduced. Can be lowered.
  • the box part 55 of the connecting means 6 is connected to the back plate 2 by the pin 56, and the box part 55 is attached to the back plate 2 so as to be rotatable vertically. You may do it.
  • the displacement means 7 may have a cam structure.
  • Fig. 16 and Fig. 17 show an example where the displacement means 7 has a cam structure.
  • a cam plate 38 is rotatably attached to a flange 12b provided so as to protrude from the back plate 2 side of the connection plate 12 by a pin 46.
  • a long hole 38a is formed in the cam plate 38, and the rotation angle of the cam plate 38 is limited to a certain range by passing the fixing pin 39 through the long hole 38a. I have.
  • the cam plate 38 can be rotated to change the distance between the second back frame 5 and the back plate 2.
  • the back plate 2 does not separate from the cam plate 38 because the back plate 2 tries to return to the original shape by its own elastic force and tries to reduce the bending angle. That is, when the pushing force by the cam plate 38 is released, the back plate 2 reduces the bending angle due to its own natural force.
  • the cam plate 38 itself may be directly driven, or the pin 46 may be rotated.
  • the rotation angle of the cam plate 38 can be fixed to an arbitrary angle, so that the bending angle of the back plate 2 can be adjusted steplessly.
  • the tilt angle of the second back frame 5 can be changed stepwise, and the bending angle of the back plate 2 can be changed in multiple steps. Can be adjusted.
  • the bending angle of the back plate 2 can be adjusted by changing the bending angle of the two links 40 and 41 by operating means (not shown) and fixing the bending angle.
  • the bending angle of the back plate 2 can be adjusted steplessly by fixing the two links 40 and 41 at an arbitrary bending angle.
  • the bending angle of the back plate 2 is increased by tilting the upper end of the second back frame 5 rearward, so that, for example, during reclining, the back of the occupant can be stretched more. Although it was possible to obtain the better stretching effect, it is not always necessary to use this configuration.
  • the lower back 2b of the back plate 2 may support the buttocks of the seated person.
  • the first back frame 1 is extended upward, and the back plate upper portion 2 a of the back plate 2 is fixed to the first back frame 1.
  • the lower portion 2b of the back plate 2 can be tilted in the front-rear direction.
  • the upper end of the second back frame 5 is rotatably attached to the first back frame 1 so as to be suspended.
  • the lower end of the second back frame 5 is connected to the lower back plate 2 of the back plate 2.
  • the lower back plate 2b of the back plate 2 becomes a buttocks support for supporting the buttocks of the occupant, and a feeling of support when sitting can be obtained.
  • a bent region 2e is formed at the boundary between the upper portion 2a of the back plate 2 and the lower portion 2b of the back plate 2 by a resin hinge or the like.
  • the second back frame 5 is omitted, and a displacement means 7 is provided between the first back frame 1 and the lower portion 2b of the back plate 2.
  • the displacement of the displacement means 7 may be directly transmitted to the lower portion 2b of the back plate.
  • the lower part 2b of the back plate, that is, the buttocks support can be tilted back and forth by changing the bending angle of the back plate 2 by operating the displacement means 7.
  • the height of the back plate 2 may be adjustable.
  • the first back frame 1 is further divided into a lower frame 1a and an upper frame 1b, and a vertically-opening cylindrical portion 1c provided at a tip of the lower frame 1a is formed into an upper frame. 1b is inserted, and the height of the back plate 2 is adjusted by sliding the upper frame 1b with respect to the cylindrical portion 1c.
  • the connection between the upper frame 1b and the cylindrical portion 1c is performed, for example, by connecting the plurality of holes 47 provided in the upper frame 1b with the holes 48 of the cylindrical portion 1c in a state where the connecting pins 49 are aligned. This is performed by penetrating through.
  • the back plate 2 By locking the upper frame 1b to the cylindrical portion 1c, the back plate 2 can be fixed at the adjusted height. By adjusting the height of the back plate 2, the height of the bent portion of the back plate 2 can be changed. As shown in Fig. 27 and Fig. 28, adjusting the height of the back plate 2 according to the physique of the occupant improves the sitting comfort. Fig. 27 shows a child sitting, and Fig. 28 shows an adult sitting.
  • a support member for assisting the backrest may be provided in addition to the backrest. That is, the support member 44 is attached to the upper end of the back plate 2 so as to be rotatable in the front-rear direction, and the support member 44 and the first back frame 1 are connected by the link 45 so as to interlock with the bending of the back plate 2. Alternatively, the support member 44 may be tilted. As the support member 44, for example, a headrest 44 can be cited. The usage conditions are shown in Fig. 31 and Fig. 32. The lower end of the headrest 44 is rotatably attached to the upper end of the back plate 2, and the upper end of the head rest 44 is connected to the first back frame 1 by a link 45.
  • the link 45 is rotatably connected to the headrest 44 and the first back frame 1. As shown in Fig. 29 and Fig. 31, when the back plate 2 is not bent so much, the headrest 44 moves backward and does not obstruct the occupant. When the backboard 2 is bent from this state, the headrest 44 moves forward as shown in FIGS. 30 and 32, and can support the head of the seated person.
  • the support member 44 is not limited to a headrest that supports the head of a seated person.
  • a headrest that supports the head of a seated person.
  • the support members 44 of Fig. 39 and Fig. 40 are, for example, if the user leans on the backboard 2 while operating the personal computer, the occupant raises the upper back slightly to see the monitor. It looks like this. Even in such a case, the upper body of the seated person can be lifted by the support body 57.
  • the link member 45 is provided to operate the servo member 44 in conjunction with the bending of the back plate 2.
  • the movement of the support member 44 is controlled by the bending of the back plate 2. It does not need to be linked to.
  • the support member 44 may be fixed to the back plate 2 or, in some cases, an operation means for operating the support member 44 independently of the bending of the back plate 2 is provided. May be tilted.
  • an operation lever or the like is provided at a position where the occupant can easily operate, and displacement means 7 such as an adjusting screw 17, a cam plate 38, and links 40 and 41 use the operation lever or the like. It is also possible to operate it.
  • an electric motor for rotating the adjusting screw 17, the cam plate 38, the link 40, 41, etc. is adopted, and the electric motor is started and stopped by a switch operation.
  • the displacement means 7 may be operated electrically.
  • a bag that expands and contracts with a fluid is provided as the displacement means 7, and the bag is connected to the second back frame 5 and the back plate 2, and a fluid such as air is injected or sucked into the bag.
  • the bag may be expanded or contracted to tilt the second back frame 5, that is, to change the bending angle of the back plate 2.
  • the seat structure of the chair includes a seat plate having a front portion fixed to the seat frame and a rear portion capable of bending vertically, and a bending angle adjusting mechanism for changing a bending angle of the seat plate and fixing the bending angle.
  • a bending angle adjusting mechanism for changing a bending angle of the seat plate and fixing the bending angle.
  • the flexible back plate 2 and the back support structure that supports the back support member 61 with at least a portion connected to the back plate 2 with flexibility are shown in Fig. l to Fig. 12 have already been described as being practicable in the embodiment shown in FIGS. 13 to 45.
  • the embodiment can be also performed in the embodiments shown in FIGS. That is, the backrest structure in which the backboard 2 is deformed in accordance with the posture when the seated person leans on the backboard 2 can be implemented alone, or the backboard 2 can be bent back and forth in the bending area 2 e. It can be carried out simultaneously with the leaning structure.
  • one set of resin back support members 61 in which the amount of a reinforcing agent such as glass fiber is adjusted so that only the portion connected to the upper portion of the back plate 2 exhibits flexibility is prepared.
  • the lower part of the back plate 2 is fixed and supported at the relatively rigid part of the member 61, while the upper part of the back plate 2 is rotatable and slidable on the tip of the flexible back support member 61.
  • the left and right back support members 61 may be separately tilted to deform the backrest according to the posture of the seated person leaning on the back.
  • first back frame 1 tiltably attached to the seat receiving member 8 with the displacement means 7 omitted, and the second back frame 5 tiltably attached to the first back frame 1 A back support member 61 having a back plate bending region 2 e, a back plate upper portion 2 a positioned above the back plate bending region 2 e, and a lower position positioned below the back plate bending region 2 e And a back plate 2 having a back plate lower portion 2b fixed to the first back frame 1 and an upper end of the second back frame 5 connected to the back plate upper portion 2a while absorbing these relative displacements.
  • the connecting means 6 may be provided.
  • the backboard bending area 2e is deformed, and the backboard upper section 2a is tilted in the front-back direction with respect to the backboard lower section 2b. 2 can be bent, and at least the upper portion 2a of the backboard 2 can be deformed.
  • the back plate 2 can be further deformed so as to be twisted in a horizontal plane. This example is shown in Fig. 44 and Fig. 45. When the occupant leans on the backboard 2, the second back frame 5 bends the upper part 2 a of the backboard 2.
  • the second back frame 5 bends following the posture of the seated person, so that the upper portion 2a of the back plate 2 can easily be deformed following the posture of the seated person. That is, also in this case, the deformation of the back plate 2 is easy, the deformation is easy to follow the movement of the occupant, and the sitting comfort is improved, and the degree of freedom of the deformation of the back plate 2 is simple.
  • This is similar to the above-described backrest structure in that the number of parts can be increased and the number of parts is not increased.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

L'invention concerne une structure de dossier de chaise pouvant être utilisée avec un ensemble de planche dorsale selon un angle préféré de courbure. La structure comprend une élément de support dorsal (61) constituée d'un premier cadre dorsal (1) inclinable, attaché à un élément de réception de siège (8) et un second cadre dorsal (5) inclinable, attaché au premier cadre dorsal (1), et comprenant une planche dorsale (2) dotée d'une région de courbure (2e), avec une portion supérieure de planche dorsale (2a) positionnée plus en hauteur que la région de courbure de planche dorsale (2e), et une portion inférieure de planche dorsale (2b) positionnée plus bas que la région de courbure de planche dorsale (2e). La portion inférieure de planche dorsale (2b) est fixée au premier cadre dorsal (1), et la portion supérieure de planche dorsale (2a) est supportée par le second cadre dorsal (5). La planche dorsale (2) peut être courbée en avant par déformation de la région de courbure de planche dorsale (2e). La structure est dotée d'un mécanisme de réglage d'angle de courbure (3), et ce mécanisme rend possible la variation de l'angle de courbure et de fixer cet angle par réglage de l'angle d'inclinaison du second cadre dorsal (5) par rapport au premier cadre dorsal (1).
PCT/JP2003/012919 2002-10-11 2003-10-08 Structure de dossier de chaise WO2004037047A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003272952A AU2003272952A1 (en) 2002-10-11 2003-10-08 Structure of chair backrest

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2002299697A JP4185754B2 (ja) 2002-04-08 2002-10-11 椅子の背もたれ構造
JP2002299716A JP2004129966A (ja) 2002-10-11 2002-10-11 椅子の背もたれ構造
JP2002-299697 2002-10-11
JP2002-299716 2002-10-11

Publications (1)

Publication Number Publication Date
WO2004037047A1 true WO2004037047A1 (fr) 2004-05-06

Family

ID=32179067

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2003/012919 WO2004037047A1 (fr) 2002-10-11 2003-10-08 Structure de dossier de chaise

Country Status (3)

Country Link
CN (1) CN100420404C (fr)
AU (1) AU2003272952A1 (fr)
WO (1) WO2004037047A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE102012109710A1 (de) * 2012-10-11 2014-06-12 Grammer Ag Fahrzeugsitz mit veränderbarer Rückenlehnenform

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Publication number Priority date Publication date Assignee Title
CN101801241B (zh) * 2007-03-13 2013-06-05 Hni技术公司 动态座椅靠背腰部支撑系统
JP5524564B2 (ja) * 2009-10-19 2014-06-18 株式会社岡村製作所 椅子の背凭れ
JP5514509B2 (ja) 2009-10-26 2014-06-04 株式会社イトーキ ロッキング椅子
CN101953592B (zh) * 2010-04-16 2012-09-05 天津开发区奥金高新技术有限公司 一种可自动调节的靠垫
JP6135098B2 (ja) * 2012-11-06 2017-05-31 コクヨ株式会社 椅子
CN106108442A (zh) * 2016-08-22 2016-11-16 南宁曦聚绰新能源有限公司 一种多用途椅子
KR101917582B1 (ko) * 2018-08-17 2018-11-09 주식회사 대하정공 텐션 등판이 구비된 의자

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Publication number Priority date Publication date Assignee Title
JPH04101652U (ja) * 1991-01-31 1992-09-02 株式会社伊藤喜工作所 椅子の背もたれ装置
JPH04118059U (ja) * 1991-04-05 1992-10-22 デユポン・ジヤパン・リミテツド 背もたれ付椅子
EP0591933A1 (fr) * 1992-10-06 1994-04-13 COMFORTO GmbH Chaise avec dossier
JP2000079034A (ja) * 1998-07-09 2000-03-21 Okamura Corp 椅 子

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Publication number Priority date Publication date Assignee Title
CN1330907A (zh) * 2000-06-09 2002-01-16 普罗科德有限公司 具有同步摇摆座位和靠背的椅子

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Publication number Priority date Publication date Assignee Title
JPH04101652U (ja) * 1991-01-31 1992-09-02 株式会社伊藤喜工作所 椅子の背もたれ装置
JPH04118059U (ja) * 1991-04-05 1992-10-22 デユポン・ジヤパン・リミテツド 背もたれ付椅子
EP0591933A1 (fr) * 1992-10-06 1994-04-13 COMFORTO GmbH Chaise avec dossier
JP2000079034A (ja) * 1998-07-09 2000-03-21 Okamura Corp 椅 子

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012109710A1 (de) * 2012-10-11 2014-06-12 Grammer Ag Fahrzeugsitz mit veränderbarer Rückenlehnenform
US9079514B2 (en) 2012-10-11 2015-07-14 Grammer Ag Vehicle seat comprising an adjustable backrest shape

Also Published As

Publication number Publication date
AU2003272952A1 (en) 2004-05-13
CN1713841A (zh) 2005-12-28
CN100420404C (zh) 2008-09-24

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