KR101279725B1 - Chair having improved hinge axis structure - Google Patents

Abstract

The present invention is a path that is provided in the first or second member and the first member or the second member which is axially coupled to be mutually axially rotatable in the storage direction or the installation direction, the delay path for the shaft rotation And a forming portion and a second or first member axially coupled to the first or second member, and the moving speed is changed while the radius of the curved protruding surface in contact with the delay path is changed as the shaft rotates. It provides a shaft coupling structure characterized in that it comprises a configured path moving body.

Description

Folding chair with improved shaft coupling structure {CHAIR HAVING IMPROVED HINGE AXIS STRUCTURE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft coupling structure (hinge structure) of a first member and a second member, and more particularly, to a shaft coupling structure capable of relieving shaft rotation speed (reducing shaft rotation speed).

Further, the present invention relates to a folding chair configured to fold the backrest and the seat with respect to each other and to be folded or installed with each other, and to reduce the axial rotational speed by adopting the axial coupling structure. The present invention relates to a folding chair configured to prevent damage to the backrest or the seat due to sudden rotation of the backrest or the seat according to the operation or to the injury caused by the collision between the surrounding personnel and these components.

In general, the chair is a chair provided with only a seat (sheet) for the user to sit; A chair having a backrest provided on one side of the seat together with the seat and / or a headrest provided on an upper end of the backrest; A chair having an armrest with said seat, backrest and headrest; The seat, the backrest, the head restraint (head support), and the armrest and the chair provided with the leg, etc. are taken in various forms.

In addition, the chair is provided to have a variety of functions according to the installation place, for example, in a large viewing facility or performance facility, such as a museum, stadium or performance hall, a stepped base end (bleacher seat) is formed, each flat end Form a mount extending in the longitudinal direction on the surface (bottom surface or wall surface of the staircase), the seat and the backrest is fixed to the mount and installed, and the backrest or the seat is axially rotatable with respect to the seat and the backrest installed on the mount. Provided are folding chairs for viewing made by hinge coupling.

For example, in the case of the folding chair installed in a viewing facility such as a movie theater, a backrest is installed on the mounting table or a flat surface, and seats are axially rotated to be stored or folded or installed with respect to the backrest. The structure is adopted. On the other hand, the folding chair of this structure, the leaf spring for maintaining the storage state is provided in the shaft coupling portion between the backrest and the seat, the user pulls the seat and the shaft is rotated to install the seat against the backrest, and then the seat You can sit on. In addition, when the user rises from the seat in this state, the seat is axially rotated to the stowed state by the weight gradient of the seat or the elastic force of the leaf spring to be folded and folded with the backrest.

By the way, in the folding chair of the above-described structure, during the axial rotation for the storage and installation of the seat and the backrest, the seat or backrest is rotated at high speed by the weight gradient or the elastic force of the spring, so that the collision between the members or There is a problem that the chair is damaged by the impact applied to the shaft coupling portion. In addition, there is a problem that a user near the backrest or the seat during the rotation of the axis hit the rotating backrest or seat to be injured.

Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a shaft coupling structure capable of relieving the shaft rotational speed of the first and second members coupled to the shaft.

Furthermore, it is an object of the present invention to provide a folding chair which is capable of preventing damage to a backrest or a seat caused by sudden turning of the backrest or a seat according to the storing or installing operation, or injury of a surrounding person due to a collision with these components. It is done.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. There will be.

In order to achieve the above object, the present invention according to the first aspect is provided in the first or second member and the first or second member which is axially coupled to be mutually axially rotatable in the storage direction or the installation direction. And a path forming unit having a delay path for rotating the shaft, and a second or first member axially coupled with the first or second member, and contacting the delay path according to the shaft rotation. It provides a shaft coupling structure characterized in that it comprises a path moving body to be changed in the moving speed while the radius of the curved protrusion surface is changed.

The path forming unit may further include a path forming plate through which the axis penetrates and the delay path is provided, and the delay path is formed around the penetrated axis on the path shape plate, and the curved line is formed. An axial engagement structure is provided, comprising: a receiving surface in contact with the protruding surface, and an elastic member comprising, as one end of the receiving surface, a fixed end for fixing the receiving surface on the path forming plate.

In addition, the curved projecting surface of the path moving body provides an axial coupling structure, characterized in that consisting of the circumferential surface of the ellipse increasing from the minimum radius to the maximum radius.

In addition, according to the rotation of the shaft, there is provided a shaft coupling structure characterized in that it is provided with a path moving body to reduce the rotation speed of the shaft while increasing the radius of the curved projecting surface in contact with the receiving surface of the delay path.

In addition, the present invention according to the second aspect, there is provided with a backrest and a seat that is fixed to the backrest while being axially coupled to the backrest and axially rotated in the storage direction or installation direction, or is unfolded from the backrest for installation A folding chair configured to be provided in the seat or the backrest, the path forming unit is provided with a delay path for rotating the shaft, and is provided in the backrest or the seat axially coupled with the seat or the backrest, the shaft rotation of the seat Accordingly, it provides a folding chair characterized in that it is provided with a path moving body to change the moving speed while the radius of the curved projecting surface in contact with the delay path.

In addition, the present invention according to the third aspect, there is provided with a fixed chain seat and a backrest which is axially coupled to the seat and axially rotated in the storage direction or installation direction to be folded in the seat or to be installed unfolded from the seat, A folding chair configured to be provided in the seat or the backrest, a path forming unit provided with a delay path for rotating the shaft, and is provided in the backrest or the seat axially coupled with the seat or the backrest, Accordingly, it provides a folding chair characterized in that it is provided with a path moving body to change the moving speed while the radius of the curved projecting surface in contact with the delay path.

According to the configuration as described above, there is an effect to provide a shaft coupling structure to be able to relax the shaft rotation speed.

Furthermore, there is an effect of preventing damage to the chair due to collision between the members rotating in accordance with the storing or installing operation of the chair and injury of the user due to the collision with the member.

1 is a side view schematically showing the operation of the shaft coupling structure according to Embodiment 1 of the present invention;
2 is a perspective view of a folding chair according to a second embodiment of the present invention;
Figure 3 is a side view showing a state in which the folding chair according to the invention installed on the wall;
4 is a perspective view showing a shaft rotating apparatus according to the present invention provided in the shaft coupling portion of the folding chair,
Figure 5 is a side view showing the storage operation of the seat of the folding chair with an axis rotation device according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

[Example 1]

1 is a view schematically showing a shaft coupling structure according to the first embodiment of the present invention, wherein the first member 10, the second member 20, and the members 10 and 20 mutually coupled to each other A shaft engaging portion 30 (hinge portion) formed at the opposite end is shown. 1 (a) shows a state in which the first member is axially rotated counterclockwise in the installation direction with respect to the second member, and FIG. 1 (b) shows a first position with respect to the second member. The member is shown rotated in the clockwise direction.

Here, the shaft coupling portion 30 includes a substantially circular path forming plate 31 and a leaf spring 32 (elastic member) for delay path forming formed on the path forming plate 31. .

On the other hand, the center of the path forming plate 31 is opened, and the rotation shaft 33 for shaft rotation is inserted into the opening. In addition, on the rotary shaft 33, a cam 34 for elastically moving the leaf spring 32 while moving along the leaf spring 32 for forming the delay path is axially coupled to interlock with the shaft.

Accordingly, when the cam 34 rotates in conjunction with the shaft, the cam 34 is pressed against the leaf spring while being in contact with the leaf spring 32 located above and below the shaft 33.

Here, the cam 34 has a maximum radius R and a minimum radius r, and the curved projecting surface 34a, which may be formed as a circumferential surface of an ellipse, for example, in which the radius continuously varies from the maximum radius R to the minimum radius r. ) Is provided at opposing ends (upper and lower ends in the drawing). On the other hand, in the curved protruding surface 34a, the maximum radius R is located at the center, and the radius of the ellipsoid decreases as it extends from the maximum radius R to both sides, and both sides of the curved protruding surface 34a are reduced. The end is the minimum radius r on the curved projection. On the other hand, in the figure, the cam 34 is shown as being formed entirely in an ellipse, but the cam 34 has the curved protruding surface 34a having the maximum radius R and the minimum radius r only at opposite ends thereof. ), And may be formed in a shape in which both ends are connected by a straight connection link as shown by a phantom dotted line.

The leaf spring 32 has an arc-shaped curved receiving surface 32a in contact with the curved projecting surface 34a and an end of the curved receiving surface. It comprises a fixed end 32b fixed on 31 and a free end 32c which initiates contact with the curved protruding surface 34a as the other end of the curved receiving surface 32a. Here, the free end 32c forms a curved surface while the end is bent outward in order to facilitate contact with the curved protruding surface 34a. In addition, the curved receiving surface 32a may be linearly formed in some cases.

Accordingly, the curved receiving surface 32a of the leaf spring 32 is pivoted with the fixed end 32b as the point as the external force from the cam is applied to the curved receiving surface 32a or the free end 32c. And elastic movement. That is, the upper and lower leaf springs 32, which are opposed to each other, rotate in the upper and lower directions about the fixed end 32b, and the distances thereof are widened so as to move away or narrow.

Here, the path forming plate 31 is coupled to the second member 20, and the shaft 34 provided with the cam 34 is coupled to the first member 10. On the contrary, the path forming plate 31 may be coupled to the first member 10, and the shaft 34 provided with the cam 34 may be coupled to the second member 20.

Accordingly, when the rotary shaft 33 rotates, for example, clockwise (that is, when the first member 10 axially coupled to the rotary shaft rotates clockwise), the cam 34 The curved protruding surface 34a of, the minimum radius r first contacts the free end 32c, and then the free radius 32c contacts the free end 32c as the radius gradually increases, and finally the maximum radius R comes into contact with the free end 32c.

On the other hand, during the contact process as described above, while the front end portion 32c and the curved receiving surface 32a of the leaf spring are turning in the left and right outward directions (clockwise) about the fixed end 32b as the radius increases. Elastic movement. That is, the potential of the leaf spring gradually increases as the tip portion 32c and the curved receiving surface 32a are rotated by the repulsive action against the external force applied from the cam.

As a result, the upper and lower leaf springs 32, which are located opposite to the cam, are pivoted in the upper and lower directions, respectively, and the potential increases as the distance increases, and during this increase, the first member 10 The rotation speed (kinetic energy) gradually decreases. Thus, the cam rotational speed of the cam is sequentially decelerated during the contacting process. That is, as the radius of the curved receiving surface in contact with the tip increases, the axial rotational speed decreases in proportion.

Here, when the maximum radius R of the curved projecting surface 34a enters into the curved receiving surface 32a via the tip portion 32c, the curved radially projecting surface 34a moves along the curved receiving surface 34a.

In this case, according to the shape or degree of curvature of the curved receiving surface 32a, for example, the leaf spring 32 of the upper and lower parts from the tip portion 32c to the middle portion (maximum bending point) of the curved receiving surface 32a. The distance between the gaps is narrowed by a predetermined portion, and the gap is widened from the middle portion of the curved receiving surface 32a to the fixed end 32b by a predetermined portion. Thus, as the maximum radius R progresses through this section, the cam's axial rotational speed may be increased by a predetermined portion and then decreased again.

Here, the rotation range of the cam 34 is such that the maximum radius R of the curved protruding surface 34a is on the space portion (or the gap portion) on the arc between the tip of the upper and lower springs and the fixing portion of the lower spring. Position and at the same time the minimum radius r is in contact with the tip portion 32c (position (a) of FIG. 1) from the position where the maximum radius R is in contact with the maximum bending point of the curved receiving surface 32a. can do.

In this case, the shaft rotation speed is decelerated by the contact between the leaf spring and the cam from the start point of the shaft rotation to the end point.

On the other hand, as shown in Fig. 1C, the curved protruding surface 34a having the maximum radial portion R and the minimum radial portion r does not contact the upper and lower leaf springs (particularly, the tip portion), and the upper and lower leaf springs. The curved protruding surface 34a of the cam may be formed to move in a space (or gap) therebetween.

In this case, during the predetermined axial rotation period, the minimum radius r of the curved projection surface 34a does not contact the tip portion 32c of the leaf spring (not subjected to resistance by contact with the leaf spring), It is possible to exercise in the space. That is, the rotational force of the first member 10 is not blocked by the leaf spring until the minimum radius r of the curved projection surface 34a and the tip portion 32c of the leaf spring come into contact with each other.

Then, the curved projecting surface 34a comes into contact with the tip portion, and as the contact radius increases, the shaft rotational speed decreases.

[Example 2]

2 is a perspective view showing a folding chair 100 according to a second embodiment of the present invention, Figure 3 is a state in which the folding chair 100 according to the present invention is installed on a flat surface (for example, a wall surface) of the proximal end The side view shown.

As shown in the figure, the folding chair 100 according to the present invention, the seat 110, the backrest 120 that the seat 110 is axially rotated, the shaft coupling portion of the backrest and the seat, and It is configured to include a mounting bracket 140 extending in the vertical direction to fix the backrest 120 on the flat surface, for example, the wall surface 200 extending in the vertical direction.

In one embodiment, a mounting bracket is installed at the lower end of the mounting table 140, and the fixing bracket is fixed to a wall by using fastening means such as bolts or nails, thereby fixing the folding chair 100 to a wall surface. You can do it.

Here, the seat 110 is axially rotated in the clockwise direction (receiving direction) with respect to the backrest 120 as shown in Fig. 3, and is in parallel with the backrest 110, thus becoming a stored state; It is axially rotated away from the backrest 120 in the counterclockwise direction (installation direction), rotates about 90 ° or 100 ° with respect to the backrest, and is opened in an approximately right angle to the installation state.

Here, the seat 110 and the backrest 120, as viewed from the side, has a shape in which the opposite end portions are axially coupled to each other, thereby improving the appearance and folding function of the chair. On the other hand, by making the weight of the curved end of the seat larger than other weights, it is possible to facilitate the rotation of the shaft relative to the backrest in the storage direction.

In addition, in the seat 110, the curved one end portion is cut in a predetermined portion to form a receiving coupling portion 111 having a “凹” shape in which a corresponding lower portion of the backrest 120 may be fitted. In addition, the backrest 120, the lower end portion to which the receiving coupling portion 111 of the seat 110 is coupled to the protrusion coupling portion 121 of the "凸" shape that can be fitted to the receiving coupling portion 111. To form.

Accordingly, by inserting the rotation shaft in the state in which the receiving coupling portion 111 is inserted into the protruding coupling portion 121, the shaft and the back and the seat and the backrest are formed while the shaft coupling portion is extended in the longitudinal direction in the left and right directions in FIG. Combined.

Here, the shaft coupling portion, when the load applied to the seat 110 in the unfolded state across the receiving coupling portion 111 and the protrusion coupling portion 121 is removed (for example, the user sitting in the seat Occurs, the shaft rotating device 130 for rotating the seat 110, for example, in the clockwise direction by the elastic repulsive force, and sequentially decelerating the shaft rotational speed.

On the other hand, the shaft rotating device 130 according to the present invention, the rotary shaft 33 and the rotary shaft 33 is axially rotated in the direction according to the clockwise and counterclockwise rotation of the seat 110, It is inserted, it is configured to include a component that rotates the seat in the clockwise direction (storing direction) by the elastic repulsive force and at the same time reduce the axial rotation speed, the component is a cylindrical housing 131 shown in FIG. Is housed within. On the other hand, the rotating shaft 33 is fixed to the receiving coupling portion 111 side of the seat 110, the housing 131 is fixed to the protruding coupling portion 121 side of the backrest 120, the seat therein The rotating shaft 33 and the cam 34 fixed to the 110 rotate.

4 is a perspective view schematically illustrating a configuration of a shaft rotating device accommodated in the housing 131. In FIG. 4, unnecessary configuration is omitted and conceptually illustrates only essential components for performing a function.

First, when the load applied to the seat 110 in the unfolded state is removed (for example, when a user sitting on the seat occurs), the seat 110 is automatically axially rotated in the receiving direction by the elastic repulsive force. In order to achieve this, the coil spring 132 is elastic between the bottom surface 131a of the housing 131 fixed to the protruding coupling portion 121 of the backrest 120 and the rotation shaft 33 fixed to the seat 110. Restoration member) extends along the longitudinal direction and is interposed. That is, one end of the coil spring 132 is fixed to the bottom surface, and the other end is fixed to the rotation shaft 33 by a connection bracket, not shown, spaced apart from the bottom surface by a predetermined distance.

The coil spring 132 coupled as described above is positioned along the length direction, for example, assuming that the rotation shaft 33 rotates about the bottom surface while the bottom surface 131a is fixed. When the seat pivots in the counterclockwise direction so that the seat and the backrest are in the installed state, the deformation (or twisting) becomes the maximum, and the potential thereof becomes the maximum.

Therefore, in this state, when the load is removed (for example, when a user sitting on the seat occurs), the seat 110 is automatically rotated clockwise while the potential is reduced by the restoring force of the coil spring. .

In addition, a path forming plate 31 provided with the leaf spring 32 and a cam 34 are rotated on the upper surface of the housing facing the bottom surface 131a on which the coil spring 132 is installed. It is provided on the shaft 33, so as to sequentially decelerate the shaft rotational speed of the seat with respect to the backrest (20).

Here, the path forming plate 31 may be installed so as not to interlock with the rotation of the rotation shaft 33 and may be implemented as an upper surface of the housing 131.

On the other hand, the operation between the cam and the leaf spring 32 on the path forming plate 31 is the same as the operation according to the first embodiment, the description thereof will be omitted.

Hereinafter, with reference to Figure 5, the storage operation for the seat 110 of the folding chair 100 having a shaft rotating device 130 according to the present invention will be described in detail.

 First, as the load is applied to the seat 110 and rotated counterclockwise with respect to the backrest to maintain the installation state, the deformation (or distortion) of the coil spring 132 is maximized, and the potential thereof is increased. This is the maximum.

At this time, the curved projecting surface 34a of the cam 34 having the maximum radius R and the minimum radius r is located in the space portion between the leaf springs 32, and preferably the minimum radius r is a plate. It comes in contact with the tip portion 32c of the spring 32 (state of Fig. 5A). In some cases, the tip portion 32c and the minimum radius portion r may be positioned at a predetermined distance from this state.

In this installation state, when the load is removed, the seat 110 is automatically rotated in the clockwise direction while the potential energy is reduced by the restoring force of the coil spring.

At this time, the curved projecting surface 34a of the cam 34 contacts the free end 32c with the minimum radius r first contacting the free end 32c, and then gradually increasing the radius. The maximum radius R is in contact with the free end 32c. Thereafter, the maximum radius R is to proceed along the curved receiving surface (32a).

During this process, the upper and lower leaf springs 32, which are opposed to each other, rotate in the upper and lower directions, respectively, to reduce the axial rotational force and the rotational speed of the cam.

Therefore, the rotational speed of the seat 110 pivoting in conjunction with the cam is sequentially reduced.

10-first member, 20-second member,
30-shaft coupling, 31-path forming plate,
32-leaf spring, 3a-curved receiving surface,
32b-fixed end, 32c-leading end.

Claims (11)

In the shaft coupling member for coupling the back of the chair and the seat so as to axially rotate in the storage direction or installation direction,
A first or second member axially coupled to each of the seat and the backrest, the first and second members being axially rotatable in a storage direction in which the seat is folded or in an installation direction in which the seat is extended;
A path forming plate provided on the first or second member and provided with a leaf spring for delaying rotation of the shaft;
A cam provided on the second or first member axially coupled to the first or second member and contacting the leaf spring according to the rotation of the shaft, and having a curved protruding surface whose radius is changed according to the rotation. Is composed,
The leaf spring is formed around the shaft through the passage formed on the path-shaped plate, the receiving surface in contact with the curved projecting surface, a fixed end for fixing the receiving surface on the path forming plate, and the fixed end of It consists of a free end that is not fixed on the other side,
And the curved protruding surface is continuously reduced from the free end to the fixed end when the seat is axially rotated from the installation direction to the receiving direction, thereby decreasing the rate of reduction of the axial rotational speed of the seat. delete The method of claim 1,
The curved projecting surface of the cam comprises an circumferential surface of an ellipse that increases from the minimum radius to the maximum radius. The method of claim 3,
And the cam has a shaft rotation speed that decreases as the shaft rotates, the radius of the curved projecting surface in contact with the receiving surface of the leaf spring increases.

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