KR102074844B1 - Chair with improved comfort - Google Patents

Abstract

The present invention relates to a chair with improved comfort. A seat includes a seat body placed on an upper side of a mechanism housing and a pair of seat pivots extending rearward from a front lower portion of the seat body and hinged to the left and right sides of the mechanism housing to be pivotable about left and right horizontal axes. A backrest includes a pair of backrest pivots extending frontward from a lower portion of a backrest body and hinged to the left and right sides of the mechanism housing to be pivotable about the left and right horizontal axes. Connection brackets are hinged to rear left and right portions of the seat body to be pivotable about the left and right horizontal axes while being fixed to the backrest pivots. Elastic supports support the backrest body against the seat body with an elastic force in a state where the seat body and the backrest body are connected, thereby enabling back-and-forth tilting of the backrest body.

Description

Chair with improved comfort

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair, and more particularly, to a chair having a backrest for supporting a back part of a seated person.

The chair is one of the furniture and consists of various kinds. For example, the chair is composed of a seat plate supporting the seat and hips of the seater, a leg supporting the seat plate, and a backrest connected to the seat plate to support the seat of the seater. In some cases, the chair has a headrest supporting the neck and the head of the seated person on the upper part of the backrest, and armrests supporting both arm parts of the seated person on both sides of the seat plate, thereby increasing convenience of use.

On the other hand, if the seated person is seated in the chair for a long time, the pressure on the buttocks and thighs by the seat plate can be felt uncomfortable. In addition, if the backrest is made of a fixed type, the seated person is uncomfortable to move the waist in a seated state on the chair, and this may cause pain in the lower back or increase the fatigue of the seated person when seated on the chair for a long time. Therefore, there is a need for a chair that can provide improved comfort even if the seated person is seated on the chair for a long time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a chair having improved comfort so that a seated person may feel improved comfort even if they are seated on the chair for a long time.

A chair with improved comfort according to the present invention for achieving the above object includes a leg, a mechanism housing, a seat plate, a backrest, a pair of connecting brackets, and a pair of elastic supports. The mechanism housing is connected above the central portion of the leg. The seat plate is disposed on the upper side of the mechanism housing to support the seat and the thigh portion of the seat occupant, respectively, and extends rearward from the front lower portion of the seat plate body, and hinged rotatably about the horizontal axis on the left and right sides of the mechanism housing. It has a pair of seat plate pivots. The backrest is arranged on the rear upper side of the seat plate main body to support the backrest part of the seated body, and a pair of hinges coupled to the left and right sides of the mechanism housing so as to pivot about the left and right horizontal axes, respectively, extending forwardly from the lower portion of the backrest body. The backrest pivots of the backrest, and backrest runways extending across the backrest pivots from the front portions of the backrest pivots. The connection brackets are pivotally hinged about the left and right horizontal axes to the rear left and right portions of the seat body while being fixed to the backrest pivots. The elastic supports support the back body with elastic force with respect to the seat body while the seat body and the back body are connected to enable front and rear tilting of the back body.

According to the present invention, when the seated person sits on the seat plate and moves the waist back and forth while leaning against the backrest, the backrest and the seat plate can be tilted back and forth in response to the waist movement, so that the user can feel improved comfort even when seated for a long time. You can also relax and relax your thighs.

1 is a side view of a chair with improved comfort according to an embodiment of the present invention.
2 is a perspective view showing a part of the chair shown in FIG.
Figure 3 is a perspective view showing a process for mounting the connection bracket on the backrest and the seat plate.
Figure 4 is a perspective view showing an extract of the elastic support and the elastic auxiliary member.
5 is an exploded perspective view of FIG. 4.
6 is a side view for explaining an example of the operation of the chair.
7 is a plan view of the locking mechanism.
8 is a side view partially disassembled the armrest.
9 is a side view for explaining an example of the operation of the armrest shown in FIG.

When described in detail with reference to the accompanying drawings for the present invention. Here, the same reference numerals are used for the same components, and repeated descriptions and detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted. Embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art. Accordingly, the shape and size of elements in the drawings may be exaggerated for clarity.

Hereinafter, the direction in which the backrest is arranged around the seat plate is called the rear of the chair, and the opposite direction is called the front of the chair. The left and right sides of the chair are defined relative to the front of the chair.

1 is a side view of a chair with improved comfort according to an embodiment of the present invention. 2 is a perspective view showing a part of the chair shown in FIG. Figure 3 is a perspective view showing a process for mounting the connection bracket on the backrest and the seat plate. Figure 4 is a perspective view showing an extract of the elastic support and the elastic auxiliary member. 5 is an exploded perspective view of FIG. 4. 6 is a side view for explaining an example of the operation of the chair.

1 to 6, a chair 100 having improved comfort according to an embodiment of the present invention includes a leg 110, a mechanism housing 120, a seat plate 130, a backrest 140, and the like. , A pair of connecting brackets 150, and a pair of elastic supports 160.

The leg 110 may have a shape in which a plurality of leg portions 112 are radially arranged from the leg body portion 111. Legs 112 may be equipped with wheels 113 at each lower end. The mechanism housing 120 is connected above the central portion of the leg 110. The leg body 111 may be equipped with a gas cylinder 114 for adjusting the height of the seat plate 130. The gas cylinder 114 may be made of various known configurations.

The gas cylinder 114 may be fixed to the mechanism housing 120 in a state in which the cylinder rod is disposed to expand and contract in the vertical direction from the upper side of the cylinder body, and the cylinder body may be fixed to the center of the leg body portion 111. . Mechanism housing 120 may be equipped with an operation mechanism for allowing or blocking the stretching operation of the gas cylinder 114 in accordance with the operation of the seated person. The operating mechanism may be of various known configurations.

The mechanism housing 120 may include a housing cover which is bolted while covering the housing body and the upper portion of the housing body. Therefore, the mechanism housing 120 facilitates the assembly of the operation mechanism and the locking mechanism 180 to be described later in accordance with the detachment of the housing cover relative to the housing body.

The seat plate 130 includes a seat plate body 131 and a pair of seat plate pivots 136. The seat plate body 131 is disposed above the mechanism housing 120 to support the seat and the thigh of the seated person. The seat plate main body 131 may include a seat plate support 132 and a seat plate sheet 133. The seat plate body 132 is made of a structure that can be elastically deformed.

The seat plate support 132 may have a structure formed along the outside of the seat plate 130 to define an opening in the center of the seat plate 130. The seat plate support 132 may have a structure in which the upper portion is formed in a convex curved shape and the front portion is formed in a convex curved form extending downward. The seat plate support 132 is made of a form that can comfortably support the seat and hips and thighs of the seated seat in the seated person sitting on the seat plate 130.

The seat plate 133 has a mesh structure and may be fixed while covering the upper portion of the seat plate support 132. Since the seat plate 130 may provide breathability by the seat plate 133 of the mesh structure, the seat plate 130 may feel comfortable even if the seated person is seated on the chair 100 for a long time.

The pair of seat plate pivots 136 extend rearward from the front lower portion of the seat plate body 131 to the left and right, respectively, so that the hinges can be pivotably rotated around the left and right horizontal axes on the left and right sides of the mechanism housing 120. do. The seat plate pivot 136 may be coupled to the left and right sides of the mechanism housing 120 by hinge shafts 136a which are parallel to the left and right directions. Thus, the seat plate pivot 136 is rotatable relative to the mechanism housing 120 about the hinge shafts 136a.

The seat plate pivot 136 extends from the left and right edges of the seat plate support 132 to the rear as the mutual gap becomes narrower and lower, and the extended ends may be hinged to the left and right sides of the mechanism housing 120. The seat plate pivot 136 may be manufactured to be integrated with the same material as the seat plate support 132. The seat plate pivot 136 may be molded by a method such as injection molding the seat plate support 132 and a plastic material.

The backrest 140 includes a backrest body 141, a pair of backrest pivots 146, and a backrest crosspiece 147. The back body 141 is disposed on the rear upper side of the seat plate body 131 to support the seat back part of the seated person. The back body 141 may include a back support 142 and a back seat 142.

The back support 142 may have a structure formed along the outside of the back 140 to define an opening in the center of the back 140. The back support 142 may be formed in a shape in which the left and right central portions are convex forward. The back support 142 has a reinforcing bar extending transversely from the left and right portions to the center, thereby achieving a more robust structure. The back support 142 is formed in a form that allows the seated person to comfortably support the seat of the seat of the seated person in an ergonomic state while leaning against the backrest 140.

The back seat 143 is made of a mesh structure can be fixed in a state covering the front of the back support (142). The backrest 140 can provide breathability by the backrest seat 143 of the mesh structure, so that the seated person can feel comfortable even if he is seated in the chair for a long time. The back seat 143 may extend to cover the spaced spaces of the elastic supports 160 to be connected to the seat plate 133. That is, the back seat 143 and the seat plate 133 may be manufactured in an integrated form and disposed over the back support 142, the elastic supports 160, and the seat plate support 132.

The pair of backrest pivots 146 extend forward from the lower portion of the backrest body 141 to the left and right, respectively, and are hinged to be pivotally pivotable about the left and right horizontal axes on the left and right sides of the mechanism housing 120. . The backrest pivots 146 may be coupled to the left and right sides of the mechanism housing 120 by hinge shafts 146a side by side in the left and right directions. Thus, the backrest pivots 146 are pivotable about the mechanism housing 120 about the hinge shaft 146a.

The hinge coupling portion of the backrest pivot 146 may be located behind the hinge coupling portion of the seat pivot 136, and may be located above the hinge coupling portion of the seat pivot 136. The backrest pivots 146 extend from the left and right edges of the backrest support 142 toward a narrower and lowered distance from each other, and the extended ends may be hinged to the left and right sides of the mechanism housing 120.

The backrest crosspiece 147 extends across the backrest pivots 146 from the front portions of the backrest pivots 146. The backrest rung 147 can firmly support the backrest pivots 146. In addition, the backrest crossbar 147 allows the locking groove 181 of the locking mechanism 180 to be described later can be formed.

The backrest crosspiece 147 may be manufactured to be integrated with the same material as the backrest pivots 146 and the backrest support 142. The backrest crosspiece 147 may be molded by a method such as injection molding with the backrest pivot 146, the backrest support 142, and a plastic material. The plastic used to manufacture the backrest 140 may be made of the same kind as the plastic used to manufacture the seat plate 130.

The pair of connection brackets 150 are hinged to the rear left and right portions of the seat plate main body 131 so as to be pivotable about the left and right horizontal axes while being fixed to the backrest pivots 146. The hinge coupling portion of the connecting bracket 150 is positioned higher than the hinge coupling portion of the backrest pivot 146 and is located between the hinge coupling portion of the backrest pivot 146 and the hinge coupling portion of the seat plate pivot 136. Can be. Here, the hinge coupling portions are arranged to maintain the backrest 140 and the seat plate 130 in a basic position in the state that no external force is applied to the backrest 140.

The backrest pivots 146 may have mounting grooves recessed to fit the lower portions of the connecting brackets 150 to the left and right sides of the extension ends. The seat plate support 132 may have mounting grooves recessed to fit the upper portions of the connecting brackets 150 to the rear left and right portions.

The hinge brackets 150a in which the lower parts are bolted to the extending ends of the backrest pivot 146 while the connecting brackets 150 are fitted in the mounting grooves, and the upper parts are parallel to the rear left and right parts of the seat plate support 132 in left and right directions. By being coupled by them, the backrest pivot 146 can be connected to the rear left and right portions of the seat body 131. Therefore, the seat plate body 131 may be smoothly elastically deformed while being rotated relative to the connection brackets 150 in accordance with the rotation of the backrest pivot 146.

The mounting grooves may be formed to smoothly fit the connection brackets 150 without stepping. The connection bracket 150 has a bolting hole for the backrest rotation table and a hinge coupling hole for the seat plate body. The connection bracket 150 has a hinge coupling hole for penetrating the hinge shaft 146a of the backrest pivot 146.

The connection bracket 150 is recessed in a central portion formed with a backing bolt for turning and a hinge coupling hole, and by fitting the bracket cover 151 in the recessed portion, the exterior can be beautiful. The connection bracket 150 may be made of a plastic material or the like. The plastic used for the connection bracket 150 may be made of the same kind as the plastic used for manufacturing the seat plate 130 and the backrest 140.

The pair of elastic supports 160 are spaced apart from the rear upper side of the seat plate body 131 to the left and right, and the seat body 141 is connected to the seat plate body 141 with the seat plate body 131 and the back plate body 141 connected to the seat plate body 131. It is supported by the elastic force with respect to the back and forth tilt of the main body 141 is possible.

The elastic supports 160 are spaced apart from side to side to support the backrest main body 141 with the elastic force with respect to the seat body 131 while the front and rear portions are fixed to the seat body 131 and the back body 141. do. The elastic support 160 may be made of a plastic material having elasticity. The plastic used for the elastic support 160 may be made of the same kind as the plastic used for the backrest 140 and the seat plate 130.

The elastic support 160 may include a support body 161 and a support rib 162. The support body 161 may have a curved shape in which the front center portion is concave to the rear. Support body 161 may be made of a smooth surface of the front portion. Support body 161 may be formed by recessed grooves along the left and right sides, respectively. The support body 161 may be formed by arranging grooves along the front and rear directions on a central lower surface thereof. Therefore, the support body 161 may be smoothly deformed by an external force applied to the backrest 140.

The seat plate support 132 may have a mounting groove recessed to fit the front portion of the support body 161 to the upper portion. The back support 142 may have a mounting recess recessed to fit the rear portion of the support body 161 to the front portion. The support body 161 is bolted and fixed in a state where the front portion is fitted into the mounting groove of the seat plate support 132, and the rear portion may be fixed by being bolted in the state fitted to the mounting groove of the back support 142. The mounting grooves may be formed to smoothly fit the support body 161 without a step.

The support rib 162 is formed to protrude from the rear surface of the support body 161. Support rib 162 enables reinforcement of support body 161. Support rib 162 may be formed in the concave-convex shape on the left and right side to be robust. The support rib 162 may be smoothly deformed by an external force applied to the backrest 140 by forming cut grooves arranged along a length direction. The back support 142 may be formed by recessing the support rib groove 142a in the front portion. The support rib groove 142a allows deformation of the support rib 162 according to the tilt of the back and forth back 140 with the support rib 162 partially inserted.

The elastic auxiliary members 170 may be fixed to each other by being padded with the elastic supports 160 to support the backrest body 141 with an elastic force with respect to the seat plate body 131. The elastic auxiliary members 170 may assist the elastic supports 160 to more stably support the back body 141 with an elastic force with respect to the seat plate body 131. Each elastic auxiliary member 170 may include a first auxiliary member 171 and a second auxiliary member 176. The first auxiliary member 171 is padded and fixed to one side of the elastic support 160, and the second auxiliary member 176 is padded and fixed to the other side of the elastic support 160.

The first auxiliary member 171 may include a member body 172 and a member extension piece 173. The member body 172 may have a front portion having the same curvature as the front portion of the support body 161. The member body 172 may be formed such that the remaining portion contacts the lower surface of the support body 161 to one side of the support rib 162 while the front portion surrounds the front lower surface of the support body 161.

The member body 172 may be fixed to the front portion is bolted to the seat plate support 132 together with the support body 161, the rear portion is bolted to the upper and lower edges of the support rib 162. The member body 172 may be smoothly deformed by an external force applied to the backrest 140 by forming grooves along the longitudinal direction on the rear surface of the portion corresponding to the support rib 162.

The member extension piece 173 may extend from the lower rear surface of the member body 172 to be partially fitted into the support rib groove 142a. The member extension piece 173 may be formed in a concave-convex shape on the left and right sides so as to be robust. The member extension piece 173 may be smoothly deformed by an external force applied to the backrest 140 because the center portion is formed to penetrate left and right.

The second auxiliary member 176 may be formed to contact the other side of the support rib 162 along the lower surface of the support body 161. The second auxiliary member 176 may be smoothly deformed by an external force applied to the backrest 140 by forming grooves along the longitudinal direction at the rear surface thereof. The second auxiliary member 176 may be bolted and fixed to upper and lower edges of the support rib 162. The first and second auxiliary members 171 and 176 may be made of the same material. The first and second auxiliary members 171 and 176 may be made of a urethane material or a plastic material softer than the elastic support.

The chair 100 described above may act as follows. The seated person sits on the seat plate 130 and leans back in a state leaning on the backrest 140. Then, the backrest 140 is tilted backwards as the backrest pivots 146 pivot rearward about a portion hinged to the mechanism housing 120. At the same time, the seat plate 130 is urged to be tilted backward by the connecting brackets 150. Then, the seat plate 130 is elastically deformed while being tilted backward as the seat plate pivot 136 rotates backward about the hinged portion of the mechanism housing 120. At this time, the front and rear tilt angle of the backrest 140 may be adjusted according to the force applied by the seated person to the backrest 140. In addition, the backrest 140 may be further tilted backward with respect to the seat plate 130 with respect to the elastic supports 160, so that the back of the seated person may be comfortably supported.

When the seated person removes the force exerted on the back 140 by lifting his / her back, the seat plate 130 is centered on a region where the seat plate pivots 136 are hinged to the mechanism housing 120 by a force to be tilted forward with restoring force. As it rotates forward, the motor tilts forward and returns. At the same time, the backrest 140 receives a force to be tilted forward by the seat plate 130. Then, the backrest 140 is tilted forward as the backrest pivot 146 pivots forward with respect to the portion hinged to the mechanism housing 120 and returns.

As described above, according to the chair 100 of the present embodiment, when the seated person sits on the seat plate 130 and moves the waist back and forth while leaning against the backrest 140, the backrest 140 and the seat plate 130 are moved back and forth in response to the waist movement. Tilt enables the user to feel improved comfort even when seated for a long time, and can provide convenience such as relieving fatigue applied to the waist, hips and thighs.

Meanwhile, as shown in FIG. 7, the chair 100 may include a locking mechanism 180 that locks or releases the backrest 140 with respect to the mechanism housing 120. Accordingly, the seated person may lock the backrest 140 to the mechanism housing 120 by the locking mechanism 180 when the seat plate 130 does not want to tilt the back and forth of the backrest 140 together. The occupant releases the backrest 140 with respect to the mechanism housing 120 by the locking mechanism 180 when the front and rear tilt of the backrest 140 is desired together with the seat plate 130, thereby supporting the backrest 140 together with the seat plate 130. ) Can be tilted back and forth at the desired angle.

For example, the locking mechanism 180 may include a locking groove 181, a movable body 182, and a locking lever 183. The locking groove 181 is formed in the backrest crosspiece 147. The locking groove 181 may be formed by being recessed in the backrest crosspiece 147 in the form of an opening facing forward. The movable body 182 is supported in the mechanism housing 120 so as to be linearly movable in the front-rear direction so that the movable body 182 is fitted into or separated from the locking groove 181 as the linear body moves.

The movable body 182 linearly moves rearward in a state separated from the locking groove 181 and fits into the locking groove 181, thereby allowing the backrest 140 to be locked to the mechanism housing 120. The movable body 182 linearly moves forward while being fitted in the locking groove 181 to be separated from the locking groove 181, thereby allowing the backrest 140 to be released relative to the mechanism housing 120.

The movable body 182 is disposed inside the mechanism housing 120 than the hinge engagement portion of the locking lever 183. The movable body 182 linearly moves in the front-rear direction under the guidance of the movable guide 184 fixed to the housing body of the mechanism housing 120. The movable body 182 may have a groove in which an inner portion of the locking lever 183 is fitted.

The locking lever 183 is hinged to pivotally pivot about a vertical axis with a part inserted into the mechanism housing 120 to linearly move the movable body 182 as it pivots by external force. The locking lever 183 is coupled to the housing main body of the mechanism housing 120 by a hinge axis in which the central portion is parallel to the vertical direction, the inner portion is fitted into the groove of the movable body 182, and the outer portion is the mechanism housing 120. Is withdrawn. The seated person may linearly move the movable body 182 in the front-rear direction along the movable body guide 184 by pivoting the handle provided in the outer portion of the locking lever 183 by hand.

On the other hand, the chair 100 may include a pair of armrests 190 which are mounted on the left and right sides of the backrest 140 so that the height can be adjusted to support the arm of the seated person. Armrests 190 may be mounted on the left and right sides of the back support (142). Armrests 190 may be tilted back and forth with the backrest 140. In a state in which the front and rear tilt angles of the backrest 140 are adjusted, the seated person may take a comfortable position by placing the arm on the front and rear tilt angle adjusted armrests 190 together with the backrest 140. In addition, the seated person can comfortably place the arms on the height-adjusted armrests 190 by adjusting the height of the armrests 190 according to their body shape.

For example, as illustrated in FIGS. 8 and 9, the armrest 190 includes a guide block 191, an armrest body 192, an armrest pad 193, a height operation lever 194, and a locking protrusion. 195, and spring 196. The guide block 191 is fixed to the backrest in such a manner that the engaging grooves 191a are arranged in the vertical direction.

The catching grooves 191a may be arranged along the vertical direction at the front portion of the guide block 191. The catching grooves 191a may be formed in a recessed shape over each of the front portion and the outer portion. The guide block 191 may be bolted to the side of the back support 142. The guide block 191 may protrude the guide pieces 191b on the outer front and rear portions. The guide block 191 may be made of a plastic material or the like.

The armrest body 192 is linearly moved in the vertical direction by receiving the guide of the guide block 191 while being partially fitted to the guide block 191. Armrest body 192 may be formed in the upper portion is bent forward with respect to the lower portion. Armrest body 192 has an inner space and the bottom end is formed in an open shape. The armrest body 192 is formed with a guide hole 192a long up and down on the side facing the back support 142.

The armrest body 192 may be fitted to the guide block 191 through the bottom opening so that the guide pieces 191b of the guide block 191 are positioned around the inner side of the guide hole 192a. Accordingly, the armrest body 192 may linearly move in the vertical direction by receiving the guide pieces 191b inserted into the guide holes 192a. Armrest body 192 may be made of a plastic material or the like.

Armrest pad 193 is mounted on the upper side of the armrest body (192). The armrest pad 193 may be mounted on the armrest body 192 such that the front and rear positions thereof are adjusted with respect to the armrest body 192, or the left and right tilted sides of the armrest body 192 are adjusted. Adjusting means for this may be made in a variety of known configurations. Armrest pad 193 may be wrapped with a cushioning material.

The height operation lever 194 is hinged to pivotally move about a horizontal axis while being partially inserted into the armrest body 192. The height operation lever 194 penetrates through the central lower surface of the armrest body 192 and is hinged to the armrest body 192 by a hinge shaft 194a in which the center portion is parallel to the left and right directions, and the outer portion is the armrest body 192. Is withdrawn from. When the seated person pushes and pulls the height operation lever 194 supported by the spring 196 by hand, the height operation lever 194 may be pivoted. The height operation lever 194 may be made of a material such as plastic.

The locking protrusion 195 is formed on the height operating lever 194 to be caught or separated from any one locking groove 191a corresponding to the vertical position of the armrest body 192 according to the pivoting operation of the height operating lever 194. . The locking protrusion 195 is formed at an inner portion of the height operation lever 194. The locking protrusion 195 may be integrally formed with the height operation lever 194.

The spring 196 applies an elastic force to the height operation lever 194 so that the locking protrusion 195 is held in the corresponding locking groove 191a. The spring 196 is deformed when an external force is applied to the height control lever 194. When the external force applied to the height operation lever 194 is removed, the spring 196 returns the height operation lever 194 by the restoring force so that the locking projection 195 is caught by the locking groove 19a. Spring 196 is made of a torsion spring, etc. may be mounted to the hinge coupling portion of the height control lever (194).

When the seated person describes a process of adjusting the height of the armrest 190 is as follows. When the seated person pulls the height operation lever 194, the locking protrusion 195 is separated from the position held by the locking groove 191a. At this time, the spring 196 is deformed. In this state, the seated person applies force to the armrest body 192 to adjust the armrest pad 193 to a desired height.

 Then, when the seated person removes the force applied to the height operation lever 194, the height operation lever 194 returns by the restoring force of the spring 196. In this case, the locking protrusion 195 may be positioned to be caught by an adjacent locking groove 191a, and the armrest body 192 may be caught by the guide block 191. As a result, the armrest pad 193 can maintain a height-adjusted state.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Could be. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

110. Leg 120. Mechanism housing
130. Seat 131. Seat body
136. Seat pivot 140. Backrest
141. Backrest body 146. Backrest pivot
150. Connecting bracket 160. Elastic support
170..Elastic auxiliary member 171.First auxiliary member
172. Second auxiliary member 180. Locking mechanism
190..armrest

Claims (6)

Leg;
A mechanism housing connected above the central portion of the leg;
A seat plate body disposed above the mechanism housing to support the seat and the thighs of the seated occupant, and rearwardly extending from the front lower portion of the seat plate body to be hinged rotatably around the left and right horizontal axes on the left and right sides of the mechanism housing; A seat plate having a pair of seat plate pivots to be formed;
As long as the backrest body disposed on the rear upper side of the seat plate main body to support the backrest portion of the seated body, respectively extending forward from the lower portion of the backrest body and hinged rotatably around the horizontal axis on the left and right sides of the mechanism housing A backrest having a pair of backrest pivots and a backrest crosspiece extending across the backrest pivots from front portions of the backrest pivots;
A locking mechanism for locking or unlocking the backrest with respect to the mechanism housing;
A pair of connecting brackets which are hinged to the rear left and right portions of the seat plate main body so as to be pivotable about a left and right horizontal axis while being fixed to the backrest pivots; And
And a pair of elastic supports supporting the backrest body with an elastic force with respect to the seatboard body in a state in which the seatboard body and the backrest body are connected to enable front and rear tilting of the backrest body.
The locking mechanism,
A locking groove formed in the backrest crossbar,
A movable body which is supported in the mechanism housing so as to be linearly movable in the front-rear direction and is fitted into or separated from the locking groove as the linear movement is performed; and
And a locking lever pivotally pivotable about a vertical axis in a partially inserted state within the mechanism housing, the locking lever linearly moving the movable body as it pivots by external force. The method of claim 1,
Comfortable chairs, characterized in that the elastic support member is fixed to each of the elastic support pads to support the back support body with an elastic force with respect to the seat plate body. delete delete The method of claim 1,
A chair having improved comfort, characterized in that it comprises a pair of armrests that are mounted on the left and right sides of the backrest respectively to adjust the height of the seated person. The method of claim 5,
The armrest,
Guide blocks fixed to the backrest in the form of the engaging grooves arranged in the vertical direction,
Armrest body linearly moved in the vertical direction in accordance with the guide of the guide block in a state fitted to the guide block,
An armrest pad mounted on an upper side of the armrest body,
A height control lever coupled to the hinge to pivotally move about a horizontal axis while being partially inserted into the armrest body;
A locking protrusion formed on the height control lever to be caught or separated from any one locking groove corresponding to an up and down position of the armrest body according to a pivoting operation of the height control lever;
And a spring for applying an elastic force to the height control lever so that the locking projection is held in the corresponding locking groove.

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