JPH0139473Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a seat chair whose backrest reclines backwards and allows the user to stretch his or her back.

(Prior Art) Conventional seat chairs that allow back-stretching movements generally have the rear part of the seat frame a and the lower part of the back frame b pivotally connected, as shown in FIG. The tip of the leg plate C having the upper part and the tip of the seat frame a are pivotally connected, and the tip of the connecting rod d is pivotally connected to the rear upright part of the leg plate C,
It is pivoted in the middle of the back frame. Therefore, the back frame, that is, the backrest, falls backwards by changing the position of pivot parts A and D, with pivot joints B and C, which do not change in position, as a reference, and when the back frame falls down, the rear of the seat frame rises. Therefore, when the user puts weight on his or her lower back, the rear part of the seat frame lowers and the back frame rises.

(Problems to be solved by the invention) Although the conventional seat chair mentioned above can be made into a slightly flat state, it has a structure that makes it impossible to fold the backrest forward, making it difficult to store and transport. The entire structure was bulky and inconvenient.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention is such that the seat frame and the back frame are not connected directly but are connected by springs. That is, two leg rods are arranged in parallel with a standing part provided at the rear, and the front horizontal rod of the seat frame is pivoted at the tip of the leg rod so as to be placed on the leg rod. The lower horizontal rod is erected so that it is located in front of the rear horizontal rod of the seat frame (including diagonally above), the back frame vertical rod is pivoted to the upper part of the leg rod, and the lower horizontal rod of the back frame and the rear horizontal rod of the seat frame are erected. A frame is formed by interposing tension springs in between, and a seat fabric and a back fabric are provided on the seat frame and back frame, respectively.

(Function) Therefore, the back frame can freely rotate forward and backward around the pivot point with the upper part of the leg stand, and when the back frame falls backwards, the lower horizontal rod of the back frame rotates diagonally forward, so As the spring extends, the rear horizontal rod of the seat frame rotates upward, so when the backrest (back frame and back cloth) falls backwards, the rear part of the seat (seat frame and seat cloth) lifts up, as in the conventional case. When the user applies weight to the waist, the backrest has the opposite effect of standing up. Furthermore, the backrest can be folded forward, and when the seat is folded forward, the distance between the lower horizontal bar of the back frame and the rear horizontal bar of the seat frame is the closest, so that it is stable when the seat is folded forward, that is, in the folded state.

(Example) An embodiment of the present invention will now be described based on the drawings.

The proposed chair consists of a seat frame A to which a seat cloth 1 containing cushions and the like is attached, a back frame B to which a back cloth 2 is similarly attached, and a leg rod C located below the seat frame A. Bend the rear part of the leg rod C to make the standing part 3.
, and an armrest 4 is formed by projecting forward from the upright part 3. The two leg rods C are arranged in parallel, and the front horizontal rod 5 of the seat frame A is pivotally connected to the tip of the leg rod C, so that the seat frame A is positioned so as to be placed on the leg rod C. The back frame B pivots the lower middle part of the vertical rod 6 to the upright part 3 of the leg rod C, and the pivot position is determined so that the lower horizontal rod 7 is located in front of the rear horizontal rod 8 of the seat frame. . A tension spring 9 is interposed between the lower horizontal bar 7 of the back frame B and the rear horizontal bar 8 of the seat frame A. In addition, a stopper 10 is attached to prevent rotation of the back frame B when the back frame B is erected.

Therefore, when the back frame B is erected and the stopper 10 is hooked to the lower horizontal rod 7 of the back frame B to prevent rotation of the back frame B, the stopper can be used as a normal seat. When the user removes 10 and falls backwards, the back frame B falls backwards and the rear part of the seat frame rises to perform a stretching motion, and when the back frame B falls forward, the seat folds. It is something.

(Effects of the invention) As described above, in this invention, the seat frame and back frame are not directly pivoted, but are connected using springs, so the backrest can be folded backwards, similar to conventional back-stretching exercise chairs. This makes it possible to stretch the back, and the backrest can also be folded forward, making it convenient for storage and transportation.
Furthermore, when the backrest is folded down, the springs apply a force to the backrest to stand up, so there is an advantage that the user can easily get up.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention; Fig. 1 is a perspective view of the frame of the proposed chair, Fig. 2 is a side view of the same, and Figs. 3 and 4 show the forward and backward reclining states. FIG. 5 is a simplified diagram showing the functions of a conventional seat chair. A is the seat frame, B is the back frame, C is the leg rod, 1 is the seat cloth, 2
is the back cloth, 3 is the upper part of the leg stand, 4 is the armrest, 5 is the front horizontal rod of the seat frame, 6 is the vertical rod of the back frame, 7 is the lower horizontal rod of the back frame, 8 is the horizontal rod at the rear of the seat frame, 9 is the spring , 10 is a stopper.

Claims (1)

[Scope of utility model registration request] Two leg rods each having a rear standing portion are arranged in parallel, the seat frame front side rod is pivotally connected to the leg rod tip, and the lower side rod of the back frame is located in front of the seat frame rear side rod. A seat chair characterized in that the back frame vertical rod is pivotally supported on the upper part of the base rod, and a tension spring is interposed between the lower back frame horizontal rod and the seat frame rear horizontal rod.