JPH03195510A - Adjusting device for seat rest rocking reaction on chair - Google Patents

Abstract

PURPOSE:To adjust the rocking reaction via only the longitudinal shift of an operation lever by providing hooking teeth and a coupling recess couplable with them, and connecting two cables to the operation lever which can longitudinally be moved along a guide shaft. CONSTITUTION:When an operation lever 19 is pushed downward to release the coupling between hooking teeth 17 and a coupling recess 20 then moved forward, one cable 15 pulls a moving shaft 11 backward via a pulley 13, the moving shaft 11 is moved behind a guide hole 12, a lower spring tray 8 is moved with a support shaft 10 serving as a fulcrum, a coil spring 7 is wholly inclined backward, and the rocking reaction of a moving seat rest member 4 is made stronger with an axis 5 serving as a fulcrum. When the operation lever 19 is moved backward, the moving shaft 11 moves the guide hole 12 forward by the traction of a cable 14, the coil spring 7 is made vertical, and the rocking reaction is made weaker than before.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a seat support locking reaction force that allows the reaction force of the locking to be finely adjusted manually in a structure in which the seat support of a chair can be tilted backwards. This invention relates to a force adjustment device.

Problems to be Solved by Conventional Technology and Inventions Most of the locking structures for chairs are related to the backrest, but in recent years, as chairs have become more luxurious, products that enable locking of the seatrest have become popular among consumers. Smell [welcoming] However, conventional products on the market have a structure in which the reaction force of locking is dependent on the strength of the spring, and it is impossible to adjust the strength of the four-way locking according to the user's preference.

The present invention aims to improve the above-mentioned conventional drawbacks and provide a seat support locking reaction force adjustment device that allows the user to adjust the locking reaction force by manually moving the operating lever in the front and rear directions. It is something to do.

Means for Solving the Problems The present invention is characterized in that the rocking reaction force can be finely adjusted by simply moving a lever placed on the side of the chair in the front-back direction. A frame-shaped support member is fixed on a gas cylinder with a front upward slope, and a locking spring is mounted on the tip of the support member so as to be able to pivot rearward with one end pivoted. It consists of a movable seat support member that is always pressed upward by the elasticity of the support member, and a coil spring that is held between upper and lower spring receivers is installed in the center of the support member, and the lower spring receiver can be rotated by the support member. Both ends of a moving shaft fixed on a support shaft suspended horizontally on the upper spring tray are movably engaged with slightly arcuate guide holes drilled on both sides of the movable seat support member, and In a configuration like K, in which two cables that can be pulled by a lever are wound around a pulley provided on a moving shaft from the front and back directions, a large number of locking teeth are arranged near the seat support, and The gist includes a control lever having a releasably engaging locking recess and movable in the front and back direction along the guide shaft, and the two cables are connected to the control lever. It is something to do.

EXAMPLE Below, the details of the present invention will be explained with reference to an example shown in the drawings. 1 is a gas cylinder incorporated in footnote 2; 3 is a frame-shaped support member fixed on the gas cylinder 1 in an upwardly inclined state; 4; is a frame-shaped movable seat support member that is pivotably mounted rearward with a pivot 5 at the tip of the support member 3, and is constantly pressed upward by the elasticity of a locking spring 6 wound around the pivot 5. has been done. Reference numeral 7 denotes two coil springs arranged at the center of the support member 3, and the coil springs 7 are sandwiched between spring receivers 8 and 9, and the lower spring receiver 8 is rotatably suspended horizontally on the support member 3. A moving shaft 110 fixed on the support shaft 10 and also fixed on the upper spring receiver 9.
Both ends are movably engaged with slightly arcuate guide holes 12 bored on both sides of the movable seat support member 4. 13 is a pulley provided on the moving shaft 11, and two capes &14.15 extending from the front and back directions are attached to the pulley 13.
One end of each of the cables 14, 15 is fixed to the movable seat support member 4, and the other end is connected to an operating lever to be described later. Reference numeral 16 denotes a dish-shaped frame body that incorporates an operating mechanism attached to the seat support of the chair. An operating lever 19 is disposed that moves on the guide shaft 18 that is connected to the two cables on the left and right, and this operating lever 19 has a plurality of engagement levers that engage the locking teeth 17 downward at the tip. A recess 20 is cut out, and the operating lever 19
The distal end thereof is constantly pressed in the direction of the locking tooth 17 by the elasticity of a spring wire 210 adjacent to the frame body 16, thereby ensuring reliable engagement between the engaging recess 20 and the locking tooth 17.

In the figure, reference numeral 22 denotes a shaft that is in a fixed relationship with the movable seat support member 4, and is inserted into a play hole 23 bored in the side surface of the support member 3.

The operation and effect of the invention is such that when the operating lever 19 is depressed downward, the locking teeth 1
7 is disengaged from the engagement recess 20, and in this state, when the operating lever 19 is moved forward (leftward in the figure), one cable 15 pulls the moving shaft 11 backward through the pulley 13. By this operation, the moving shaft 11 moves to the rear of the guide hole 12, and the lower spring receiver 8 moves to the support shaft 10.
The entire coil spring 7 tilts backwards, and the locking reaction force of the movable seat support member 4 using the pivot shaft 5 as a fulcrum becomes stronger, and the operating lever 19 is moved rearward (rightward in the figure). When the cable 14 is pulled, the moving shaft 11 moves forward through the guide hole 12, and the coil spring 7 becomes vertical, so that the locking reaction force becomes weaker than before.

As described above, the present invention includes a frame-shaped support member fixed on a gas cylinder incorporated in a footnote in an upwardly inclined state;
A movable seat support member is mounted on the distal end of the support member so as to be able to pivot rearward with one end pivoted, and is constantly pressed upward by the elasticity of a locking spring loaded inside the support member. A coil spring held between upper and lower spring receivers is installed in the center of the holder, the lower spring receiver is fixed on a support shaft rotatably mounted horizontally on the support member, and the moving shaft is fixed on the upper spring receiver. Two cables whose ends are movably engaged with slightly arcuate guide holes drilled on both sides of the movable seat support member and which can be pulled by a lever on a pulley provided on the moving shaft are connected from the front and rear directions, respectively. In the configuration for winding, it has a large number of locking teeth arranged near the seat support, a locking recess that releasably engages with the locking teeth, and moves in the front-rear direction along the guide shaft. According to a configuration in which the two cables are connected to the operating lever, when the user moves the operating lever in the front and back direction while seated on the seat support,
The locking reaction force of the seat support can be finely adjusted in stages within the range of the guide hole according to the user's preference, making it more comfortable to use and more luxurious than conventional chairs of this type. In addition to being able to obtain a chair that is suitable for use, it is also possible to obtain a chair that is as convenient to use as it is only necessary to move the control lever while seated, as described above.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the main part, FIGS. 2 and 3 are sectional views of the main part, and FIG. 4 is a perspective view of a part of the main part. FIG. 5 is a plan view of the operating mechanism section, and FIG. 6 is a perspective view thereof. 3... Supporting member, 4... Movable bearing member, 5... Pivot, 6... Locking spring, 7... Coil spring, 1
DESCRIPTION OF SYMBOLS 1... Moving axis, 12... Guide hole, 13... Pulley 14.15... Cable, 17... Locking tooth, 1
8...Guide shaft, 19...Operation lever 20...
Engagement recess. Figure 4

Claims (1)

[Claims] A frame-shaped support member is fixed on the gas cylinder incorporated in the footnote in an upwardly tilted state, and one end of the support member is pivoted so that it can pivot rearward, and A movable seat support member is always pressed upward by the elasticity of a locking spring loaded in the support member, and a coil spring held between upper and lower spring receivers is installed in the center of the support member. is fixed on a support shaft rotatably suspended horizontally on the support member, and both ends of the moving shaft fixed on the upper spring receiver are moved to slightly arcuate guide holes drilled on both sides of the movable seat support member. In a configuration in which two cables that can be engaged with each other and can be pulled by a lever are wound around a pulley provided on the moving shaft from the front and back directions, a large number of locks are arranged near the seat support. It consists of teeth and an operating lever that has a locking recess that releasably engages with the locking teeth and is movable in the front-rear direction along the guide shaft, and the two cables are attached to the operating lever. A device for adjusting a seat support rocking reaction force in a chair.