JP2784601B2 - Adjustment device for seat locking reaction force in chair - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a seat locking reaction force in which a seat portion of a chair can be locked rearward and the reaction force of the locking can be finely adjusted manually. And an adjusting device.

Problems to be solved by the prior art and the invention Most of the locking structures in chairs are related to backrests, but in recent years, products that allow the seat to be locked with the preference for chairs are welcomed among consumers. Have been. However, the products on the market conventionally have a structure in which the locking reaction force is left to the strength of the spring, and it is impossible to adjust the strength of the locking according to the user's preference.

SUMMARY OF THE INVENTION The present invention improves the above-mentioned conventional drawbacks and provides a seating rocking reaction force adjusting device which allows a user to manually adjust an operating lever in the front-rear direction to adjust the rocking reaction force. It is assumed that.

Means for Solving the Problems The present invention has a feature in that the reaction force of the rocking can be finely adjusted only by moving the lever arranged on the side of the chair in the front-back direction, and is incorporated in the pillar. Frame-shaped support member fixed on the gas cylinder in a forwardly inclined state, and one end of the support member is pivotally mounted rearwardly with one end having a pivot axis, and furthermore is elastically mounted inside. And a movable seat receiving member which is constantly pressed upward by the elastic force of the locking spring. A coil spring sandwiched between upper and lower spring receiving plates is installed at the center of the supporting member, and the lower spring receiving plate is supported. The movable shaft is fixed on a support shaft rotatably mounted on a member and both ends of a moving shaft fixed on an upper spring pan can be moved to slightly arcuate guide holes formed on both sides of the movable seat receiving member. A pulley that engages and is provided on the moving shaft. In a configuration in which two cables that can be pulled by a lever by a lever are respectively wound from the front and rear directions, a large number of locking teeth arranged near the seat receiver and a releasably engaging with the locking teeth. An operating lever having a locking concave portion to be engaged and movable in the front-rear direction along the guide shaft.
The gist of the invention is to connect the cables of a book.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a gas cylinder incorporated in a pillar 2, 3 is a frame-shaped support member fixed on the gas cylinder 1 in an upwardly inclined state. Reference numeral 4 denotes a frame-shaped movable seating member which is pivotally mounted rearwardly with a pivot 5 at the tip of the support member 3, and which is resilient to a rocking spring 6 wound around the pivot 5. It is constantly suppressed upward. Reference numeral 7 denotes two coil springs arranged at the center of the support member 3. The coil springs 7 are clamped by spring trays 8, 9, and the lower spring tray 8 is rotatably mounted on the support member 3 so as to be rotatable. Both ends of a moving shaft 11 fixed on a suspended support shaft 10 and fixed on an upper spring tray 9 are movably engaged with guide holes 12 formed in both sides of the movable seat receiving member 4 and having a slightly arcuate shape. I have. 13 is the moving axis 11
A pulley provided on the upper side, around which two cables 14, 15 extending from the front-rear direction are wound around the pulley 13, and one end of each of the cables 14, 15 is fixed to the movable seat receiving member 4,
The other end is connected to an operation lever described later. Reference numeral 16 denotes a dish-shaped frame body incorporating an operation mechanism mounted on a seat of a chair, and a large number of locking teeth 17 are arranged on a bottom wall of the frame body 16 and the frame 16 is laid horizontally. On the guide shaft 18, and an operation lever 19 to which the two cables are connected to the left and right is arranged. A concave portion 20 is provided, and the distal end of the operating lever 19 is constantly resiliently pressed in the direction of the locking tooth 17 by the elastic force of the spring wire 21 provided adjacent to the frame 16, so that the engagement concave portion 20 and the locking tooth 17 Secure engagement is ensured.

In the drawing, reference numeral 22 denotes a shaft which is fixedly connected to the movable seat receiving member 4, and is inserted through a play hole 23 formed on a side surface of the support member 3.

When the operation lever 19 is pressed downward, the locking teeth 17
When the operating lever 19 is moved forward (to the left in the drawing) in this state, the one cable 15 is pulled back through the pulley 13 and the moving shaft 11 is pulled backward. By this operation, the moving shaft 11 moves to the rear part of the guide hole 12, and the lower spring tray 8 moves about the support shaft 10 so that the entire coil spring 7 is inclined rearward and the pivot shaft 5 is moved.
When the locking reaction force of the movable seat receiving member 4 which is the fulcrum becomes strong, and the operating lever 19 is moved rearward (rightward in the figure), the moving shaft 11 moves the guide hole 12 forward by the pulling of the cable 14. Then, the coil spring 7 is in the vertical state, and the locking reaction force is weaker than the above.

As described above, the present invention provides a frame-shaped support member fixed in an upwardly inclined state on a gas cylinder incorporated in a pillar, and a rear end having a pivot at one end at a tip end of the support member. A movable seat receiving member which is movably mounted on the shaft, and which is constantly resiliently pressed upward by the elastic force of a locking spring mounted inside; and is held at the center of the supporting member by upper and lower spring receiving plates. A coil spring is installed, a lower spring tray is fixed on a support shaft rotatably mounted on the support member, and both ends of a moving shaft fixed on an upper spring tray are drilled on both sides of the movable seat receiving member. In a configuration in which two cables which are movably engaged with the slightly arcuate guide holes and which can be pulled by a lever on a pulley provided on the moving shaft by a lever are respectively wound from the front and rear directions. A large number of locking teeth arranged in the vicinity of the receiving member; An operation lever having a locking recess that is removably engaged with the teeth and movable in the front-rear direction along a guide line, wherein the two cables are connected to the operation lever. Accordingly, when the user moves the operation lever in the front-rear direction while sitting on the seat, the locking reaction force of the seat support is finely adjusted stepwise within the range of the guide hole according to the user's preference. As compared to conventional chairs of this type, comfortable chairs with a feeling of use are provided, as well as chairs adapted for high-grade orientation.
It is only necessary to move the operation lever in a seated state, and it is possible to obtain an extremely convenient chair in use.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention. FIG. 1 is a side view of a main part, FIGS. 2 and 3 are cross-sectional views of the main part, and FIG. FIG. 5 is a plan view of the operation mechanism, and FIG. 6 is a perspective view of the same. 3 ... support member, 4 ... movable seat receiving member, 5 ... pivot, 6
Locking spring, 7 Coil spring, 11 Moving shaft, 12 Guide hole, 13 Pulley, 14, 15 Cable, 17 Locking teeth, 18 Guide shaft, 19 Operation lever, 20 ... engagement recess.

Claims (1)

(57) [Claims] 1. A frame-like support member fixed in an upwardly inclined state on a gas cylinder incorporated in a pillar, and one end of the support member having a pivot at one end thereof is pivotable rearward. A movable seat receiving member which is axially mounted and constantly pressed upward by the resilience of a locking spring mounted inside thereof is provided with a coil spring sandwiched between upper and lower spring trays at the center of the supporting member. Then, the lower spring tray is fixed on a support shaft rotatably mounted on the support member, and both ends of the moving shaft fixed on the upper spring tray are drilled on both sides of the movable seat receiving member. In a configuration in which two cables that can be movably engaged with a guide hole and that can be pulled by a lever on a pulley provided on the moving shaft by a lever from the front and rear directions, respectively, A large number of locking teeth, and An operating lever having a locking concave portion that is freely engaged and movable in the front-rear direction along the guide shaft, wherein the two cables are connected to the operating lever. Adjustment device for seat rocking reaction force in a chair.