JP3104562U - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat chair capable of performing a delicate angle adjustment of a backrest with a small amount of equipment and capable of obtaining high convenience and an excellent relaxing feeling during sitting. SOLUTION: This seat chair 1 includes a seat portion 2, a backrest 3, an armrest 4, and a rotation support table 5 mounted on the bottom surface of the seat portion 2, wherein the seat portion 2 and the backrest 3 of the seat chair 1 are provided. Were connected by seven or more stages of ratchet fittings with adjustable angles. The ratchet metal fitting is configured such that the ratchet 22 of the rotation metal fitting 20 and the reverse rotation preventing claw 30 are supported by the housing 12 of the fixing metal fitting 10, and the claw pieces 31 of the reverse rotation preventing claw 30 are sequentially fed to the plurality of ratchet teeth 23. The forward rotation of the rotation fitting 20 is allowed, and the reverse rotation is restricted by the engagement of the claw pieces 31 with the ratchet teeth 23.
[Selection diagram] Fig. 1

Description

  The present invention relates to a seating chair, and more particularly to a seating chair having both high comfort during sitting and excellent convenience, and capable of adjusting a backrest at multiple subtle angles.

2. Description of the Related Art Conventionally, there is a seat chair that can easily adjust a tilt angle while sitting on a backrest portion (for example, see Patent Document 1). The seat chair disclosed in Patent Literature 1 includes a seat, a backrest, an armrest, and both ends pivotally supported between the seat and the backrest. A gas spring mechanism that can be tilted according to an external force that tilts the lever, and a lever mechanism that abuts an operation rod that converts a displacement amount obtained by a lever operation unit into a motion that rotates around a fulcrum. It describes that the inclination of the backrest can be easily adjusted steplessly by pressing the operating rod while sitting on the seat.
JP-A-2001-128777 (page 1-2, FIG. 1)

  However, the seat chair requires a device such as a gas spring mechanism, an operating rod or a lever operating portion for adjusting the inclination of the backrest portion, and has a drawback that the manufacturing cost and the weight of the main body are increased. In addition, since the angle adjustment of the backrest is complicated, there is a problem that the usability and convenience are reduced.

  In view of the above, the present invention has been made to provide a seating chair that can perform a delicate angle adjustment of the backrest with a small amount of equipment and can obtain high convenience and an excellent relaxing feeling while sitting. is there.

  In order to solve the above problems, a chair according to the present invention is a seat chair including a seat, a backrest, an armrest, and a rotation support table mounted on a bottom surface of the seat, and a seat of the seat and the seat. It is characterized in that the backrest is connected with a ratchet metal fitting whose angle can be adjusted in seven or more steps.

  In the ratchet fitting, the ratchet of the rotating fitting and the anti-reverse pawl are pivotally supported by the housing of the fixing fitting, and the pawl pieces of the reverse-preventing pawl are sequentially fed to the plurality of ratchet teeth, so that the forward rotation of the rotatable fitting is performed. In addition to being allowed, the reverse rotation is restricted by the engagement of the pawl with the ratchet teeth.

  Providing the armrest and the rotation support base can enhance comfort and convenience during sitting. Further, since the seat and the backrest are connected by a ratchet metal fitting whose angle can be adjusted in seven or more steps, the angle of the backrest can be finely adjusted with a small amount of equipment, and an excellent feeling of relaxation can be obtained.

Hereinafter, an embodiment of a chair according to the present invention will be described with reference to the drawings.
A seating chair 1 shown in FIG. 1 includes a seat portion 2, a backrest 3, an armrest 4, and a rotation support table 5 mounted on the bottom surface of the seat portion 2. The seat 2, the backrest 3 and the armrest 4 are formed by using a shaped hollow pipe 6 as a core material, and covering the pipe 6 with a cushioning material 7 and a cover 8. In addition, by providing a pair of armrests 4 at both ends of the seat portion 2, a feeling of relaxation while sitting can be obtained, and luxurious appearance can be produced.

  The rotation support 5 mounted on the bottom surface of the seat 2 enables the chair 1 to be easily turned or rotated in a seated state. The rotary support 5 is not particularly limited as long as it is light, thin, strong, and versatile. For example, a rotary support disclosed in Japanese Patent Application Laid-Open No. 8-29996 is preferable. By installing the rotation support table 5, convenience during use and ease of use can be improved.

  The seat portion 2 and the backrest 3 of the seating chair 1 are connected by a ratchet fitting A whose angle can be adjusted in seven or more steps.

  As shown in FIG. 2, the ratchet bracket A has a ratchet 22 of the pivoting bracket 20 rotatably supported by the housing 12 of the fixing bracket 10, and a reverse rotation preventing claw 30 on a plurality of ratchet teeth 23 of the ratchet 22. Correspondingly, the anti-reverse pawl 30 is urged in the direction of engaging the pawl pieces 31, 32 with the ratchet teeth 23, and the pawl pieces 31, 32 are pressed against the plurality of ratchet teeth 23. The forward rotation allows the rotation fitting 20 to rotate forward with respect to the fixing fitting 10, and the claw pieces 31, 32 engage with one of the ratchet teeth 23, thereby restricting the reverse rotation. It was done.

  In addition, the pitch of the ratchet teeth 23 is set such that the reverse rotation is restricted at seven or more rotational positions within a rotation range of 90 degrees with respect to the fixed metal fitting 10, and the rotation preventing claw 30 is The claw pieces 31 and 32 are constituted by first and second claw pieces 31 and 32 that can engage with two adjacent ratchet teeth 23 among the plurality of ratchet teeth 23.

  Further, a cam plate 40 provided with a peripheral recess 41 for allowing engagement of the claw piece with the ratchet teeth 23 and a peripheral protrusion 42 for preventing engagement is provided on the outer peripheral edge of the housing 12. In a state in which the rotation bracket 20 is rotatably supported and is located at an initial position when the rotation fitting 20 rotates in the forward rotation direction, the second claw piece 32 is disposed in the peripheral recess 41 of the cam plate 40 and the claw piece is disposed. 32 are configured to engage the ratchet teeth 23.

  Furthermore, when the rotation fitting 20 is disposed at the end position by the rotation in the forward rotation direction, the rotation fitting 20 pushes the cam plate 40 in the forward rotation direction, and the second claw piece 32 is moved to the peripheral edge of the cam plate 40. By being guided from the concave portion 41 to the peripheral edge protruding portion 42, the claw pieces 32 are separated from the ratchet teeth 23, and the rotation metal member 20 is allowed to rotate in the reverse rotation direction.

  Furthermore, when the rotation fitting 20 returns to the initial position by the rotation in the reverse rotation direction, the rotation fitting 20 pushes the cam plate 40 in the reverse rotation direction, and the second claw piece 32 moves to the peripheral edge of the cam plate 40. The first and second claw pieces 31 and 32 are inserted into the respective tooth grooves of the ratchet teeth 23 corresponding to the initial engagement positions of the respective claw pieces by being guided from the protrusion 42 to the peripheral recess 41. Being done.

  Furthermore, in a state where the rotation metal fitting 20 is arranged in the initial position, the end of the cam plate 40 near the peripheral concave portion 41 of the peripheral projecting portion 42 has a ratchet tooth corresponding to the initial engagement position of the second claw piece 32. It is arranged in 23 tooth spaces.

For this reason, by connecting the ratchet fitting A between the seat portion 2 and the backrest 3, as shown in FIG. 3, the backrest 3 can be finely adjusted in seven or more steps at a fine angle. Can be set to a desired angle, and an excellent relaxing feeling can be obtained.
The ratchet fitting A is a known technique disclosed in Japanese Utility Model Registration No. 3092591.

FIG. 2 is an overall perspective view of the chair according to the present invention with a part of the chair cut away. It is sectional drawing which shows the detail of a ratchet fitting. It is a figure which shows the use state which raised the backrest.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Seat chair 2 Seat part 3 Backrest 4 Armrest 5 Rotation support base 6 Pipe 7 Buffer material 8 Cover A Ratchet metal fitting 10 Fixing metal 12 Housing 20 Rotation metal fitting 22 Ratchet 23 Ratchet teeth 30 Reverse prevention nail 31 Nail piece 32 Nail piece 40 Cam plate 41 Peripheral recess 42 Peripheral protrusion

Claims (2)

  A seat having a seat, a backrest, an armrest, and a rotating support mounted on the bottom of the seat, wherein the seat and the back of the seat are provided with seven or more steps of ratchet metal fittings whose angle can be adjusted. A seat chair characterized by being connected.   The ratchet fitting of the rotation fitting and the anti-rotation claw are pivotally supported by the housing of the fixing fitting, and the claw pieces of the rotation prevention claw are sequentially fed to a plurality of ratchet teeth, so that the forward rotation of the rotation fitting is allowed. The seat chair according to claim 1, wherein the reverse rotation is restricted by engaging the pawl pieces with the ratchet teeth.

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