JPH01158907A - Device for keeping normal position of legs of universal chair - Google Patents

Abstract

PURPOSE: To fix a sitting element and a leg at their original position and to make freely possible to rotate owing to remove a clutch with human body weight on seating by mounting a clutch mechanism at a lower part of a sitting frame of an adjustable chair with casters. CONSTITUTION: A chair keeps its original position even on its movement, because it is fixed and integrated at its original position by pushing up upper part of the chair with a coil spring 7 inserted into a spring inserting axis 6 by a clutch bridge 5 with a square hole for the clutch of a frame 2 in general. When the upper part of the chair only falls down to a line of stop color 8 by human body weight on seating, the clutch bridge 5 is removed out from the square hole for the clutch of frame 2 to make the upper part of the chair possible to rotate at 360 degree to left or right direction.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flexible chair, and this type of chair, which can be moved easily and freely by casters on the legs, is commonly used in offices, but due to its structure, the seat and legs are Since each of the legs moves and rotates independently, it is difficult to maintain the ideal leg position as shown in Figure 1 for each movement (in the case of quadrupeds), and depending on the position of the legs that changes each time, the It becomes a nuisance, creates a bad view, and spoils the beauty.

The correct leg position holding device of the adjustable chair of the present invention is built into the frame 2 attached to the lower part of the seat part 1, and the chair is fixed and integrated with a clutch mechanism, so that the chair can be moved while maintaining the correct leg position. It is possible. To explain in more detail, the frame 2 mainly has a square hole on the lower surface of the seat part 1 that serves as the IK latch mechanism, and the support pipe 5 that supports the chair.
The clutch piece 5 is fixed to the tip of the column bearing 4 and the column pipe 3, as shown in FIGS. 3 and 4. Since the upper body of the chair is pushed up and fixed in the correct position by the coil spring 7 into which the insert @ 6 is fitted, the correct leg position can be maintained without change even when moving.

Also, by multiplying IJ[i-, when only the upper body of the chair descends to the gland of the stopper 8 as shown in Fig. 5 due to the weight pressure, the clutch piece 5 comes off from the square clutch hole in the frame 2, and the upper body of the chair is moved to the left. It can be rotated 360 degrees to the right and can be used for one purpose without any difference from a conventional adjustable chair.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a top view showing the correct leg position in the case of four legs, FIG. 2 is a partially sectional side view,
Figures 3 and 4 are top and side views showing the fixed state, Figure 5 is a side view with the clutch piece disengaged due to weight pressure, Figure 6 is a perspective view of the clutch piece, Figures 7 and 8 are top and side views of the clutch piece divided into five equal parts in the case of a tripod. 1. Sakake part Z frame & strut pipe 4. Pillar bearing 5, clutch piece & spring insertion shaft Z coil spring stop collar 2 fixed handle

Claims (1)

[Claims] A clutch mechanism is installed at the bottom of the seat base of a swivel chair with casters, and the seat and legs are fixed in the normal leg position, and when you sit on it, the clutch piece comes off due to the pressure of your body weight and moves to the left or right.
A device for maintaining the correct leg position of a flexible chair that allows free rotation of 60 degrees.