KR200243561Y1 - Tilting base for a chair - Google Patents

Abstract

The present invention relates to a tilting chair base that is improved to be easily tilted for a chair back, the base on which the seat plate is fixed to the seat, a fixed frame for holding the base, and fixed to the rear end of the fixed frame. And a backrest frame comprising a backrest frame on which a backrest for a chair is installed, comprising: a support bracket extending vertically bent downward at both ends of the base in a longitudinal direction; A connection pin for rotatably connecting a portion of the support bracket and a fixing frame in the width direction thereof; A support pin for rotatably connecting the support bracket and the back frame in the width direction to the opposite side of the connection pin; An extension piece extending from the distal end of the back frame to the connection pin side; It comprises a working pin for rotatably connecting the front end and the fixed frame of the extension piece in the width direction.

This design prevents the back frame frame from being damaged or damaged due to the load concentration because the load acting on the backrest is distributed over the back frame, seat plate base and fixed frame. Tilt dampening provides the advantage of maximizing comfort in chair use.

Description

TILTING BASE FOR A CHAIR}

The present invention relates to a tilting chair base that improves the convenience of using the chair by allowing the chair back frame and the seat plate frame to tilt in proportion to each other.

In general, the chair is configured to form a seat plate that is fixedly coupled to the upright leg and to extend the backrest to the back of the seat plate, the chair is installed in office chairs, buses and trains, and most chairs for home use is the seat plate And the backrest is usually formed in a fixed state, causing inconvenience in use.

Therefore, in recent years, a number of chairs having a structure in which the seat plate and the backrest can be moved according to the seating state of the user have been proposed.

However, most of these improved chairs have a structure that can be hinged when connecting the back frame to which the backrest is fixed to the fixed frame, and by adding a spring which is an elastic member, the hinge connecting portion can be buffered by the spring while being tilted. Because of this, the load of the user concentrated on the hinge connection portion was easily broken or damaged.

The present invention has been devised to solve the problems in view of the above-described prior art as described above, by allowing the base frame on which the backrest frame and the seat plate are seated and the fixed frame supporting the base to be interlocked with each other in proportion to the tilting buffer. The object of the present invention is to provide a tilting chair base that increases durability and extends life and maximizes convenience of chair use.

The above object of the present invention is for a chair comprising a base on which a seat plate for seating is fixed, a fixed frame for holding the base, and a backrest frame fixed to the rear end of the fixed frame and provided with a backrest for the chair. A base, comprising: a support bracket extending vertically bent downward at both ends of a length direction of the base; A connection pin for rotatably connecting a portion of the support bracket and a fixing frame in the width direction thereof; A support pin for rotatably connecting the support bracket and the back frame in the width direction to the opposite side of the connection pin; An extension piece extending from the distal end of the back frame to the connection pin side; It is achieved by including an operating pin for rotatably connecting the leading end and the fixed frame of the extension in the width direction.

1 is a perspective view of a base for a chair according to the present invention,

FIG. 2 is a perspective view of FIG. 1 rotated 180 °;

3 is a partially cutaway perspective view of FIG. 2;

4 and 5 is an exemplary view showing an operating state and a use state of the chair base according to the present invention.

Explanation of symbols on the main parts of the drawings

100: fixed frame 200: base

210: elastic spring 220: connecting pin

230: support pin 240: support bracket

300: back frame 310: operating pin

320: extension

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

1 and 2 is a perspective view of the chair base according to the present invention from the top and bottom side, Figure 3 is a partially cut perspective view of the chair base according to the present invention.

According to Figures 1 to 3, the fixed frame 100 is provided and the base 200 is provided on the upper side of the fixed frame 100, the base 200 is the fixed frame by a connecting pin 220 Is rotatably fixed to the (100).

The base 200 supports the seat plate to be seated and fixed so that the seat plate can be tilted smoothly from the bottom of the seat plate.

The support brackets 240 are vertically bent and extended at both ends of the base 200 to restrain the coupling between the base 200 and the fixed frame 100.

Thus, the connecting pin 220 is rotatably arranged to penetrate both ends of the support bracket 240 and the fixed frame 100 in the width direction.

On the other hand, the other part of the support bracket 240 is connected to the backrest frame 300 by the support pin 230 in the same form as the installation structure of the connection pin 220 described above.

At this time, the front end of the backrest frame 300 is connected to the fixing frame 100 by a separate operation pin 310 and the opposite end is connected to the support bracket 240 by the support pin 230 do.

Therefore, the shape of the imaginary line connecting the pins 220, 230, and 310 is substantially triangular.

To this end, the support bracket 240 forms a substantially '∪' shape in which the center portion is concave, and the backrest frame 300 and the fixing frame 100 rotate by the operation pin 310 at the recessed portion. Possibly connected.

In addition, the center portion of the opposite side fixed frame 100 of the backrest frame 300 is provided with an elastic adjustment member 212 is fixed to the base 200 and its end is fixed to the base 200, the elastic adjustment member ( An elastic spring 210 is interposed inside the 212.

Therefore, by adjusting the elastic control member 212 it is possible to easily adjust the pressure pressure between the fixed frame 100 and the base 200.

In addition, an angle adjusting screw 330 is installed at the center of the back of the back frame 300, the angle adjusting screw 330 is to function to easily fix the tilting angle of the back frame 300.

Height adjustment lever 400 is disposed through the side of the fixed frame 100 in a conventional installation method.

The present invention consisting of such a configuration works as follows.

Referring to FIGS. 4 to 5, when the backrest B is tilted backwards, that is, when the backrest B is tilted in the 'ga' direction, the seat plate S is operated to interlock with the backrest B while rising vertically in the 'I' direction. Done.

That is, by the operation of the backrest B, the front end of the backrest frame 300 is rotated about the support pin 230, which is its rotation axis, and the rear end thereof is operated downward.

At the same time, the front end of the extension piece 320 of the back frame 300 is constrained to the fixed frame 100 by the operation pin 310, so that the center portion of the fixed frame 100 is to be raised, wherein the fixed frame ( Part of the 100 is constrained to the support bracket 240 of the base 200 by another connecting pin 220, so that the tip of the base 200 and the fixing frame 100 is centered on the connecting pin 220. It is moved downward while compressing the elastic spring 210.

Herein, by appropriately adjusting the length of the extension piece 320, for example, the ratio of the distance between the connecting pin 220 and the operating pin 310 to the distance between the operating pin 310 and the support pin 230 1: By setting it to about 2, it is preferable to configure the tilting operation more smoothly by the principle of the lever.

On the other hand, when the external force applied to the backrest frame 300 is removed, the reverse operation is performed as described above, and the backrest frame 300, the base 200, the fixed frame 100, and the elastic spring 210 are returned to their initial positions. .

In particular, since the structure of the present invention described above is configured to operate in a fixed proportion 100 and the base 200 in proportion to the backrest frame 300 is a rigid structure that does not easily break because the working load is not touched at one point. It can be taken simply because it is a structure by the rotatable pin coupling is easy to install according to the mounting and detachment of the back frame 300.

As described in detail above, the present invention provides the following effects.

First, since the load acting on the backrest is distributed over the backrest frame, the seat plate base and the fixed frame, it provides an effect of preventing damage or breakage of the backrest frame due to load concentration.

Second, since the back frame, seat plate base and the fixed frame is proportionally tilted and cushioned, it provides an advantage of maximizing comfort of chair use.

Claims (2)

A base 200 to which the seat plate S for seating is fixed, a fixing frame 100 for supporting the base 200, and fixed to the rear end of the fixing frame 100, and a chair back B is fixed. In the base for a chair comprising a backrest frame 300 is installed, A support bracket 240 extended and vertically bent downward at both ends of the base in the longitudinal direction; A connection pin 220 for rotatably connecting a portion of the support bracket 240 and the fixing frame 100 in the width direction thereof; A support pin 230 on the opposite side of the connection pin 220 to rotatably connect the support bracket 240 and the backrest frame 300 in the width direction thereof; An extension piece 320 extending from the tip of the backrest frame 300 toward the connection pin 220; Tilting chair base characterized in that it comprises a working pin 310 for rotatably connecting the front end of the extension piece and the fixed frame 100 in the width direction. According to claim 1, wherein the extension piece 320 is a length such that the ratio of the distance between the connecting pin 220 and the actuating pin 310 to the distance between the actuating pin 310 and the support pin 230 1: 1: Tilting chair base characterized in that it is extended to have.