JP3026232U - Chair using leaf spring locking mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] By using a leaf spring, a smooth rocking texture can be obtained, the mechanism can be easily made compact, and a stable seating feeling can be obtained without lifting the front portion of the seat surface. To [Structure] A leaf spring 9 which is abutted on an arc-shaped abutment body 6 and whose both ends are abutted on the base frame 1 side and the main seat plate 11 side respectively and freely supported.
And a front seat plate 11a joined to the front end of the main seat plate 11 by a hinge 16 is pivotally connected to the base frame 1 to form a front folding type. [Effect] By utilizing the elasticity of the leaf spring, a smooth rocking texture can be obtained, the structure is simple and the size can be made compact, and a lifted front seat plate can be eliminated to provide a stable seating feeling.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chair using a leaf spring locking mechanism.

[0002]

[Prior art]

 In recent years, chairs such as office chairs, conference chairs, and reception chairs have been ergonomically researched, and chairs capable of exhibiting appropriate functions according to the purpose of use have been made. In particular, attention is paid to the resilience and cushioning properties of the seats and leanings that affect the comfort of the chair.

[0003]

[Problems to be solved by the device]

 However, in this type of conventional chair, coil springs are often used as the elastic body used for elasticity, cushioning, rocking, etc., and it is difficult to obtain a smooth rocking texture. Since the mechanism cannot be made compact, the structure is naturally complicated, and workability and work efficiency are degraded, and product costs are high. Furthermore, when the seat locking system was adopted, a stable seating feeling could not be obtained due to the lifting of the front seat plate. The purpose of the present invention is to obtain a smooth rocking texture by using a leaf spring, to easily make the mechanism compact, and to obtain a stable seating feeling without lifting the front portion of the seat surface. .

[0004]

[Means for Solving the Problems]

 The present invention has been made to solve the above problems, and its gist is to provide a circular arc contacting body on the upper surface of a base frame attached to the upper ends of legs and to provide an integral support to the frame. The main seating plate of the above is pivotally pivoted back and forth by a swinging pivot, and both ends of the main seating plate are abutted to the base frame side and the main seating plate side and are freely supported by being interlocked with the circular arc dissipating body. A chair using a leaf spring locking mechanism that is a front folding type in which a front seat plate that is provided as a main seat plate and is hinged to the front end of the main seat plate is pivotally connected to a base frame. Next, the chair of the present invention will be described in detail with reference to the following embodiments with reference to the drawings.

[0005]

【Example】

 First, a base frame 1 is attached to the upper ends of the legs 3, and vertical support plates 2 are integrally provided on both left and right edges of the base frame. An arc engagement body 6 whose outer surface is an arc surface is integrally provided on the upper surface of the base frame 1. Further, a main seating plate 11 having a support 12 integrated with the base frame 1 is pivotally mounted on a pivoting shaft 4 so as to be swingable back and forth. The lower surface of the main seat plate 11 is provided with a swinging frame 13 which forms an engaging portion 13a by the left and right side rods 14, 14. In addition, the main seat plate 11 integrated with the above-mentioned support 12 has pivotal support portions 15 on both left and right sides of a swing frame 13 attached to the lower surface thereof, which are pivotally attached to the left and right support plate portions 2 of the base frame 1 by a swing pivot shaft 4. ing. Next, a leaf spring 9 is provided which is engaged with the circular arc engaging member 6 and has both ends engaged with the base frame 1 side and the main seat plate 11 side, respectively, and supported freely. As shown in FIG. 3, one end side of the leaf spring 9 is inserted into an engaging portion 8 formed between the plate 7 attached to the front side of the base frame 1 and the circular arc engaging body 6. The other end of the leaf spring 9 is brought into contact with the circular arc engaging member 6 and then with the bottom surface 10 of the main seat plate 11 and with the engaging portion 13a of the swinging frame 13. Are freely supported. Further, the front seat plate 11a joined to the front end of the main seat plate 11 by a hinge 16 is pivotally connected 20 to the base frame 1 to form a front folding type. In the figure, 17 is a support plate, 18 is a link, and 19 is a pin.

[0006]

[Action]

 In the chair of the present invention, due to the above-mentioned configuration, when the user sits down on the chair, the smooth texture of rocking is possible due to the action of the leaf spring 9.

[0007]

[Effect of device]

 In this invention, by utilizing the elasticity of the leaf spring, a smooth rocking feeling can be obtained, the mechanism can be simplified and the size can be made compact, and a stable seating feeling can be obtained without lifting the front seat plate. It greatly contributes to.

[Brief description of drawings]

FIG. 1 is a side view of a chair using the leaf spring locking mechanism of the present invention.

FIG. 2 is a side view showing a use state of a chair using the leaf spring locking mechanism of the present invention.

FIG. 3 is an enlarged explanatory view of an essential part of a leaf spring locking mechanism of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base frame 2 Support plate part 3 Leg body 4 Swing pivot shaft 5 Pivot support shaft 6 Circular arc contact member 7 Covered plate 8 Engagement part 9 Leaf spring 10 Bottom 11 Main seat plate 11a Front seat plate 12 Leaning 13 Swing frame 13a Contact part 14 Side rod 15 Pivot part 16 Hinge 17 Support plate 18 Link 19 Pin 20 Pivot support connection

Claims (1)

[Scope of utility model registration request] 1. An arc-shaped engaging member 6 is provided on the upper surface of a base frame 1 attached to the upper end of a leg body 3, and a main seat plate 11 having a support 12 integrated with the base frame 1 is pivoted back and forth by a pivot shaft 4. It is provided with a leaf spring 9 which is freely pivotally attached and is abutted to the arc-shaped abutment body 6 and has both ends abuttingly attached to the base frame 1 side and the main seat plate 11 side to be freely supported. A chair using a leaf spring locking mechanism that is a front folding type in which a front seat plate 11a joined to a front end of 11 by a hinge 16 is pivotally connected to the base frame 1.