JP2012523886A - Seat furniture with backrest moved - Google Patents

Abstract

  The present invention relates to seat furniture, and in particular, a lower frame connected to a support; an upper frame connected to the lower frame through vertical displacement generating means; and installed between the lower frame and the upper frame. One or more elastic bodies; formed on the left and right ends of the upper frame and connected to the back frame to move in the front-rear direction; and a load is applied to the seat portion coupled to the upper frame And a power generation unit in which the displacement due to the lowering of the upper frame is converted into a linear motion by a back-and-forth moving means and the back frame is advanced; and when a load acts on the seat, the back frame moves only forward When the possible half-lock state is reached and the load applied to the seat is removed, the backrest frame can be moved backwards. And unlocking (unlock) a state switching portion that; relates seating furniture back is moved, which comprises a.

Description

  The present invention relates to seat furniture, and more particularly to a technique for allowing the back of the seat furniture to always support the back portion of the wearer so that the user can sit in a correct posture.

  Due to the fact that the majority of the time spent sitting on seat furniture such as chairs and sofas, the number of people experiencing distress due to incorrect seating postures is increasing. The cause of such a problem occurs when people sit down with their hips bent while keeping their hips and buttocks in close contact with the backrest when sitting on the seat furniture.

  In this regard, a plurality of chairs capable of supporting the back portion by moving the backrest are disclosed, and a representative one is a technique of Korean Patent Application No. 10-2007-0060533 by the present inventor.

  In the above technology, when a person sits on the seat portion, a driving force is generated by the load and the backrest moves forward so that the backrest can be brought into close contact with the back portion. The height of the configuration for implementation in the vertical direction is long, and there is a limit to the application to various chairs, and there is a limitation in improving the appearance of the chair. In addition, there is a need for improvement because there is a possibility that the structural safety is lowered and there is a possibility of a problem in durability.

  Accordingly, an object of the present invention is to provide a seat furniture whose backrest is moved, which is more compact and structurally more stable and can be applied to various seat furniture.

  In order to achieve the above object, the present invention provides a seat furniture in which a backrest is moved, a lower frame connected to a support; an upper frame connected to the lower frame through vertical displacement generating means; and the lower frame. One or more elastic bodies installed between the upper frame and the upper frame; forward and backward moving means that are formed at the left and right ends of the upper frame and connected to the back frame and move in the front-rear direction; When a load is applied to the seat portion, the displacement due to the lowering of the upper frame is converted into a linear motion by the back-and-forth moving means, and the power generating portion where the backrest frame is advanced; and the load acts on the seat portion When the load applied to the seat portion is removed, the backrest frame is in a half-lock state in which the backrest frame can move only forward. Suggest seating furniture backrest, characterized in that it comprises a moved; sauce frame switching section becomes unlocked (unlock) state can be moved rearward.

  Preferably, the vertical displacement generating means includes a plurality of vertical slides that linearly move by connecting the lower frame and the upper frame, or a plurality of link plates that are folded. suggest.

  Preferably, the power generation unit is coupled to a vertical rack gear installed vertically on the upper surface of the lower frame; a gear box coupled to the upper frame; and a first shaft installed on the lower side of the gear box. A pinion gear meshing with the vertical rack gear; a vertical bevel gear coupled to the first shaft adjacent to the pinion gear; horizontally installed inside the gear box and connected to the vertical bevel gear on a lower surface And a spur gear that is rotated by being coupled with a horizontal bevel gear; and a horizontal rack gear that is coupled to the lower portion of the backrest and meshes with the spur gear to transmit power to the backrest frame. Suggest furniture.

  Preferably, the power generation unit proposes seat furniture for moving the backrest, characterized in that a stopper is connected to a stop lever on one side of the spur gear and selectively coupled to or released from the spur gear.

  Preferably, the switching unit is coupled to the inside of the upper frame in the front-rear direction so that the direction of rotation is changed depending on whether or not a load is applied to the seat portion; Proposed seat furniture with a backrest that can be rotated within a limited angular range and includes a latch hook that is selectively coupled to or separated from the pivoting latch. To do.

  Preferably, in the seat furniture in which the backrest is moved, the seat portion can move up and down with the rear end portion of the upper frame as a fixed portion, and the rotation latch is disposed on the lower surface of the front end portion of the seat portion. The present invention proposes a seat furniture in which a backrest is moved, characterized in that a pusher connected to a front end portion is formed and the rotation of the rotation latch is enabled by the movement of the seat portion.

  Preferably, the pusher is an upper pusher facing a lower surface of the seat portion; an upper end portion is inserted and moved through a lower side of the upper pusher, and a lower end portion is a lower pusher coupled to the rotation latch; The present invention proposes seat furniture in which a backrest is moved, which comprises: a coil spring installed between the upper pusher and the lower pusher.

  Preferably, the switching unit includes a latch guide in which a slot drilled in the front-rear direction is formed between the rotation latch and the latch hook, and the latch hook protrudes with a separation distance. One limit pin is formed, the latch hook is installed to pass through the slot, and is configured to be constrained by two limit pins so that the rotation angle of the latch hook can be limited. Propose seat furniture with a backrest that is characterized by doing.

  More preferably, the switching unit is provided with a release lever capable of adjusting the rotation latch to an unlocked state by pushing a front end portion of the rotation latch, and proposes seat furniture for moving the backrest. To do.

  The seat furniture to which the backrest is moved according to the present invention basically has an effect that the backrest is automatically advanced when seated to support the back portion of the user so that the correct posture can be maintained. In addition to the office chair, it can be used in various chairs such as student classroom chairs, sofas, trains, aircraft chairs, and the like.

1 is a schematic partial perspective view of seat furniture according to a first embodiment of the present invention. It is the fragmentary sectional view seen from the front. It is sectional drawing seen from the side surface. It is a top view. It is a fragmentary perspective view which shows the one part component containing a lower frame. It is sectional drawing which shows the back-and-forth moving means used for this embodiment. It is a fragmentary perspective view which shows the principal part of a motive power production | generation part. It is a perspective view of the principal part which shows the coupling state of a switching part. It is a schematic sectional drawing of the chair by 2nd Embodiment. It is a schematic side view which shows the structure of a link plate.

  Hereinafter, seat furniture (hereinafter referred to as seat furniture) in which a backrest is moved according to the present invention will be described in detail through specific embodiments. For a clearer understanding of the present technology, reference is made to the accompanying drawings of the preferred embodiments. However, the presented drawings and the like are merely examples embodied by the technical idea of the present invention, such as implementation with simple design changes by others and substitution of equivalent components of some components. It should be understood that such implementations are also within the scope of the present invention.

<First Embodiment>
First, the seat furniture according to the first embodiment will be described, and FIG. 1 is a schematic partial perspective view thereof. In 1st Embodiment, the case where the technique of this invention is applied to a thing like a common office chair is shown. 2 is a partial cross-sectional view seen from the front, FIG. 3 is a cross-sectional view seen from the side, and FIG. 4 corresponds to a plan view.

  When the user sits on the seat portion 10 constituting the chair, the backrest 20 is automatically advanced to support the user's back region. 200, vertical displacement generating means 300, elastic body 400, forward / backward moving means 500, backrest frame 600, power generation unit 700, and switching unit 800.

  The lower frame 100 is a part fixedly connected to the support body 30, and the support body 30 here means a lower side mainly including a foot portion of a chair. The shape and function of the support 30 can be different depending on the type of seat furniture. In the case of the office chair of this embodiment, the height of the support portion itself can often be changed. That is, in consideration of the height of the user, the length of the support portion can be varied as necessary. Such a technique relating to the height adjustment of the support corresponds to a known technique.

  FIG. 5 is a partial perspective view showing some components including the lower frame. As shown in the drawing, the lower frame 100 is connected to the upper end of the support 30, and vertical displacement generating means is provided on the left and right side surfaces of the lower frame 100. 300 is installed. The upper frame 200 is positioned above the lower frame 100 through the vertical displacement generating means 300. In the present embodiment, the vertical displacement generating means 300 uses a mechanism in which the upper frame 200 can move vertically with respect to the fixed lower frame 100, and a plurality of balls can move linearly while rolling along the rail. Yes. As long as it can perform a linear sliding motion, a device including an LM guide can be used. The vertical displacement generating means used in the present embodiment is also called a vertical slider. This has the same configuration as the back-and-forth moving means described later.

  One or more elastic bodies 400 capable of providing a repulsive force are installed between the lower frame 100 and the upper frame 200, and a coil spring is preferably used. That is, when a person sits on the seat portion 10, the elastic body 400 is contracted while the upper frame 200 is lowered, the repulsive force is preserved, and when the load is removed, the elastic body 400 is restored. The upper frame 200 is pushed up.

  When a load is applied to the seat portion 10, the backrest frame 600 moves forward while linearly moving. A back-and-forth moving means 500 for linear movement of the backrest frame 600 is provided. The front-rear moving means 500 is installed in the front-rear direction at the left and right inner ends of the upper frame 200 and constitutes a structure connected to the back frame 600. The forward / backward moving unit 500 may be any unit capable of linear movement, and in the present embodiment, a unit such as the vertical displacement generating unit 300 described above is used.

  FIG. 6 is a cross-sectional view showing the longitudinal moving means 500 used in the present embodiment, and the vertical displacement generating means 300 has the same configuration except for the difference in length. As shown in the drawing, the forward / backward moving unit 500 includes a fixed rail 510 fixed to the upper frame 200. The fixed rail 510 has a length corresponding to the length of the upper frame 200 in the front-rear direction. An intermediate rail 520 having a shorter length than the fixed rail 510 is formed on the inner surface of the fixed rail 510, and a movable rail 530 is coupled to the inside of the intermediate rail 520. On the other hand, a plurality of balls 540 are sandwiched between the intermediate rails 520, and the balls 540 roll while being in contact with the fixed rail 510 and the movable rail 530. On the other hand, the upper frame 200 is connected to the bracket 531 coupled to the movable rail 530, and the backrest frame 600 can linearly move with the power generated by the power generation unit 700 described later. That is, when the back frame 600 linearly moves in the front-rear direction, the intermediate rail 520 and the movable rail 530 move simultaneously with respect to the fixed rail 510. In particular, the movable rail has a movement distance larger than the movement amount of the intermediate rail. The back-and-forth moving means showing such a mechanism corresponds to a technique known as a purchased item.

  Next, the power generation unit 700 will be described. FIG. 7 corresponds to a partial perspective view showing the main part of the power generation unit.

  In the power generation unit 700, a load is applied to the seat unit 10 coupled to the upper frame 200, and the linear movement is converted by the back-and-forth movement unit 500 using the displacement caused by the lowering of the upper frame 200. This is a part that functions and allows the back frame 600 to advance.

  More specifically, the structure of the power generation unit 700 will be described.

  The main components constituting the power generation unit 700 include a vertical rack gear 710, a gear box 720, a pinion gear 730, a vertical bevel gear 740, a horizontal bevel gear 750, a spur gear 760, and a horizontal rack gear 770, and the vertical rack gear 710 is a lower portion. A pinion gear 730 described later is engaged with the upper surface of the frame 100 in a vertical direction. Meanwhile, a gear box 720 is installed on the upper frame 200, a first shaft s1 is installed in the horizontal direction on the lower side of the gear box 720, and a pinion gear 730 and a vertical bevel gear 740 are installed on the first shaft s1. . The pinion gear 730 meshes with the vertical rack gear 710, and the pinion gear 730 and the vertical bevel gear 740 can be rotated together.

  A spar gear 760 installed horizontally in the gear box 720 is rotatably installed above the vertical bevel gear 740, and a horizontal bevel gear 750 connected to the vertical bevel gear 740 is coupled to the lower surface of the spar gear 760. The When the upper frame 200 is lowered through the coupling relationship as described above, the pinion gear 730 is rotated along the vertical rack gear 710, and the rotational force is transmitted to the horizontal bevel gear 750 through the vertical bevel gear 740, so that the spur gear 760 is rotated. .

  The spur gear 760 is rotated by the power generated by the displacement of the upper frame 200 as it descends, and the rotational force of the spur gear 760 is transmitted to the back frame 600, and a horizontal rack gear 770 is further provided. The horizontal rack gear 770 has an upper end coupled to the lower side of the back frame 600, and is disposed in the front-rear direction, so that the back frame 600 can be moved by linear movement by the rotation of the spur gear 760. More preferably, in order to allow the horizontal rack gear 770 to be accurately meshed with the spur gear 760, the outer surface of the horizontal rack gear 770 (the opposite surface on which teeth are formed) on one side of the upper surface of the gear box 720. Is provided with a guide roller 780 which is rotated by being contacted. The horizontal rack gear 770 formed with a relatively long length is supported by the guide roller 780 at a point where the horizontal rack gear 770 meshes with the spar gear 760, so that the spar gear 760 and the horizontal rack gear 770 can mesh accurately and smoothly. Power can be transmitted.

  More preferably, the power generation unit 700 is provided with a stopper 790 that can forcibly block the rotation of the spur gear 760 and fix the back frame 600 in a certain position. The stopper 790 is connected to the stop lever 791 and can be coupled to the spur gear 760 or can be released by operating the stop lever 791. That is, when the stopper 790 meshes with the spur gear 760, the backrest frame 600 does not move backward even if the load applied to the seat portion 10 is removed, and can stop at the moved position. As shown in the figure, the stopper 790 is rotatably connected to one side of the gear box 720, is coupled to a terminal of the stop lever 791, and is disconnected from the spur gear 760 by moving the stop lever 791 up and down.

  In the present embodiment, the power generation unit is configured using a plurality of gears. However, it is obvious that the power generation unit can also be configured using a belt or a chain.

  Next, the switching unit 800 will be described. FIG. 8 corresponds to a perspective view of the main part showing the coupling state of the switching unit, and will be referred to together with FIGS.

  The switching unit 800 is in a half-lock state where the backrest frame 600 can move only forward when a load is applied to the seat unit, such as when the user is seated on the seat unit 10. When the working load of the seat part 10 is completely removed, the backrest frame 600 functions to be able to be converted into an unlocked state so that it can be moved backward. That is, when the user sits on the seat portion 10, the backrest frame 600 moves forward by the power generation portion 700 described above, but at this time, the switching portion 800 does not limit the forward movement of the backrest frame 600. When the back frame 600 touches the back part of the user, the backward movement is restricted so that the back frame 600 cannot be moved backward from the current position. Such a state can be referred to as a half-lock state, and while the user is seated, the backrest frame 600 is suddenly retracted even if the body moves or the load is temporarily reduced. Can be prevented.

  On the other hand, when the user sits up and stands up from the chair, the external force acting on the seat unit 10 becomes zero, so that the upper frame 200 is lifted, and the power generation unit 700 may retract the back frame 600. Generate power that can be. Accordingly, since the back frame 600 must be moved backward at the initial position, the switching unit 800 must be in an unlocked state so as not to limit the backward movement of the back frame 600 at all.

  More specifically, the switching unit 800 includes a rotation latch 810 and a latch hook 820. The rotation latch 810 is installed in the upper frame 200 so as to be rotatable in the front-rear direction. The As shown in the figure, the rotation latch 810 is installed so as to be parallel to the front / rear moving means 500 installed at either one end of the upper frame 200, and is supported rotatably at both front and rear ends. The rotation latch 810 rotates inward when a load is applied to the seat portion 10 and rotates outward when the load is removed.

  The latch hook 820 is connected to the lower surface of the back frame 600, and is installed so as to be able to rotate within a limited angular range. The latch hook 820 is coupled to or separated from the rotation latch 810, thereby moving the back frame 600 forward. It functions to limit movement, backward movement or backward movement. As shown in the figure, the latch hook 820 is pointed so that it can be engaged with the saw-toothed rotation latch 810. When the latch hook 820 is engaged with the rotation latch 810, the backrest frame 600 is not retracted.

  As described above, the rotation latch 810 determines the rotation direction depending on whether or not a load is applied to the seat portion 10, and more specifically, the relationship between the rotation latch 810 and the seat portion 10. Will be described.

  In the present embodiment, the rear end portion of the seat portion 10 is coupled to the rear end of the upper frame 200. The front end portion of the seat portion 10 can move up and down. Therefore, when the user sits on the seat portion 10, the front end portion of the seat portion moves downward while being pushed downward. By providing the pusher 830 connected to the front end portion of the rotation latch 810 on the front side end lower surface of the seat portion 10, the rotation direction of the rotation latch 810 is determined by the movement of the seat portion 10. be able to.

  A more specific structure of the pusher 830 connected to the rotation latch 810 is as follows.

  The pusher 830 includes an upper pusher 831 and a lower pusher 832, and a coil spring 833 is installed between the upper pusher 831 and the lower pusher 832. The upper end of the upper pusher 831 faces the lower surface of the seat portion 10, and the upper pusher 831 is inserted into the lower end of the upper pusher 831 so that the upper pusher 831 can move. The lower end is connected to the front end of the rotation latch 810. That is, the upper pusher 831 is inserted into the upper end of the lower pusher 832, and the coil spring 833 is installed therebetween. When a load is applied to the seat portion 10, the upper pusher 831 is pressurized and moves downward. At this time, the force is transmitted through the coil spring 833 and the lower pusher 832 is pressurized, and the rotation latch 810 is moved inward. Turn to. When the turning latch 810 is turned inward, the switching unit 800 is in a half-lock state, and the latch hook 820 is not engaged with the turning latch 810, so that the backrest frame 600 is moved forward. be able to. On the other hand, when the position is temporarily fixed after the back frame 600 moves forward, the backward movement of the back frame 600 is restricted while the latch hook 820 is held in a state of being engaged with the rotation latch 810. To do.

  When the latch hook 820 constituting the switching unit 800 is rotated within a limited angular range, the rotation latch 810 and the end portion of the latch hook 820 are located at a position where they can be coupled. For this purpose, in this embodiment, a latch guide 840 having a slot 841 drilled between the installation positions of the rotation latch 810 and the latch hook 820 is provided. The latch guide 840 is installed on the upper frame 200, and a latch hook 820 is partially inserted into the slot 841. In particular, the latch hook 820 is formed with one limit pin 821 in the vicinity of the terminal, and another limit pin 821 is formed so as to protrude from the limit pin 821. The latch hook 820 can be rotated within a limited range by the two limit pins 821, and one limit pin 821 is disposed on each of the left and right sides of the slot 841.

  More preferably, in the configuration of the switching unit 800, the rotation latch 810 is adjusted to an unlocked state as necessary, so that the position of the backrest frame 600 can be finely adjusted even when sitting on a chair. To do. For this purpose, a release lever 850 is provided that pushes the front end of the rotation latch 810 to rotate outward. The ability to move the pivot latch 810 outward while a person is seated in the chair is achieved by the structure of the pusher 830. That is, the already-mentioned pusher 830 includes an upper pusher 831 and a lower pusher 832 with a coil spring 833 interposed therebetween, and the lower pusher 832 is inserted into the upper pusher 831 and can move. If the coil spring 833 is compressed by the movement, the lower pusher 832 is raised along the upper pusher 831 to which the lower pusher 832 is fixed, so that the rotation latch 810 can be adjusted.

Second Embodiment
Next, a second embodiment of the present invention will be described. In this embodiment, the case where the technique of this invention is applied to the chair which a student can use in a classroom like a school is shown.

  Unlike the first embodiment, there is a difference in the shape of the support 30 on which the lower frame 100 is fixedly installed and the shape of the lower frame. In particular, the vertical displacement generating means 300 that connects the upper frame 200 and the lower frame 100 includes a plurality of vertical displacement generating means 300. It is characterized by comprising the link plate 300a to be folded. FIG. 9 is a schematic sectional view of a chair according to the second embodiment, and FIG. 10 is a schematic side view showing the structure of a link plate.

  As shown in the figure, the link plate 300a is formed in four directions so that the upper frame 200 and the lower frame 100 can be stably connected, and the U-shaped plate unit 310 is connected to the shaft. The upper frame 200 can move up and down with respect to the lower frame 100. In order to connect the plate unit 310 to the upper frame and the lower frame and connect the plate unit 310 to the upper frame 200 and the lower frame 100, the shaft unit is inserted to connect the plate unit. Preferably, the size of the plate unit 310 located at the uppermost part is the largest, and the link unit 300a can be folded without interfering with the plurality of plate unit bodies 310 by decreasing toward the lower part. Since other backrest frame movement relationships are the same as those in the first embodiment, description thereof will be omitted.

  The seat furniture to which the backrest is moved according to the present invention can be applied to the general office chair and school classroom chair described above, and can also be applied to a sofa. It can also be used as a chair.

  The seat furniture according to the present invention has a back frame that is automatically connected to the back by simply sitting on the seat, and supports the back part so that it can maintain a correct posture. This is a technology that can be used for all chairs, sofas, office chairs, household chairs, and sofas. Further, it is expected that the present invention can be widely applied to train chairs, aircraft chairs and the like in specific applications.

DESCRIPTION OF SYMBOLS 10 Seat part 20 Backrest 30 Support body 100 Lower frame 200 Upper frame 300 Vertical displacement generating means 300a Link plate 310 Plate unit body 320 Connection bracket 400 Elastic body 500 Back and forth movement means 510 Fixed rail 520 Intermediate rail 530 Movable rail 540 Ball 531 Bracket 600 Back frame 700 Power generation unit 710 Vertical rack gear 720 Gear box 730 Pinion gear 740 Vertical bevel gear 750 Horizontal bevel gear 760 Spur gear 770 Horizontal rack gear 780 Guide roller 790 Stopper 800 Switching unit 810 Rotation latch 820 Latch hook 821 Limit pin 830 Pusher 831 Upper pusher 832 Lower pusher 833 Coil spring 840 Latch guide 841 Slot 850 Release lever

Claims (9)

  In a seat furniture in which a backrest is moved, a lower frame connected to a support; an upper frame connected to the lower frame through a vertical displacement generating means; installed between the lower frame and the upper frame One or more elastic bodies; and a front-rear moving means that is formed at the left and right ends of the upper frame and is connected to the back frame to move in the front-rear direction; and when a load is applied to the seat portion coupled to the upper frame A power generation unit in which the displacement due to the lowering of the upper frame is converted into a linear motion by a back-and-forth movement means, and the back frame is advanced; and when a load acts on the seat, the back frame moves only forward When the possible half-lock state is reached and the load applied to the seat is removed, the backrest frame is moved backwards Seating furniture back is moved, characterized in that it comprises; bets a switching unit becomes unlocked (unlock) ready for.   The backrest according to claim 1, wherein the vertical displacement generating means comprises a plurality of vertical slides or a plurality of folded link plates that linearly move by connecting the lower frame and the upper frame. Seat furniture.   The power generation unit is coupled to a vertical rack gear installed vertically on the upper surface of the lower frame; a gear box coupled to the upper frame; and a first shaft installed on the lower side of the gear box, A pinion gear meshing with a vertical rack gear; a vertical bevel gear coupled to the first shaft adjacent to the pinion gear; a horizontal installed inside the gear box and connected to the vertical bevel gear on a lower surface The backrest according to claim 2, further comprising: a spur gear to which a bevel gear is coupled and rotated; and a horizontal rack gear that is coupled to a lower portion of the backrest and meshes with the spur gear to transmit power to a backrest frame. Seat furniture.   4. The seat furniture according to claim 3, wherein the power generation unit includes a stopper connected to a stop lever and selectively coupled to or released from the spur gear on one side of the spur gear.   The switching unit includes a rotation latch coupled to the inside of the upper frame in the front-rear direction so that a rotation direction is changed depending on whether or not a load is applied to the seat unit; A latch hook that can be rotated within an angular range and selectively coupled to or separated from the pivot latch. Seat furniture with the described backrest moved.   In the seat furniture to which the backrest is moved, the seat part can move up and down with the rear end part of the upper frame as a fixed part, and the front end part of the rotating latch is provided on the lower surface of the front side end part of the seat part. The seat furniture according to claim 5, wherein a pusher to be connected is formed, and the rotation of the rotation latch is enabled by the movement of the seat portion.   The pusher is an upper pusher that faces the lower surface of the seat portion; an upper end portion is inserted and moved through a lower side of the upper pusher, and a lower end portion is a lower pusher coupled to the rotating latch; and the upper pusher The seat furniture to which the backrest is moved according to claim 6, comprising: a coil spring installed between the lower pusher and the lower pusher.   The switching unit includes a latch guide in which a slot drilled in the front-rear direction is formed between the rotation latch and the latch hook, and the latch hook has two limiting pins protruding with a separation distance. The latch hook is installed so as to pass through the slot, and is configured to be constrained by two limit pins so that the rotation angle of the latch hook can be limited. The seat furniture to which the backrest according to claim 5 is moved.   The seat furniture for moving a backrest according to claim 5, wherein the switching unit includes a release lever that can push the front end of the rotation latch to adjust the rotation latch to an unlocked state. .

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