JP2011172952A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chair enabling a user to take a nap or to operate and watch an information processor in a recumbent posture, in addition to being used as an ordinary chair. <P>SOLUTION: A chair body 1 includes a seat portion 3 and a backrest portion 5. The chair body is freely movable, turnable, and height-adjustable by means of a leg portion 7. Only at the lowest position in the height of the chair body 1, lever slide grooves 22 are connected to each other in a front part 21A and a rear part 21B of a reclining adjusting plate, making a position freely movable for a lever mechanism 30 that sets a reclining angle of the backrest portion 5. After the chair body 1 is lowered, the chair can be converted to a bed by spreading auxiliary extension portions 3B and 3C of the seat portion 3 to stand auxiliary legs 19, and then by lowering the backrest portion 5 to stand auxiliary legs 18. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a chair, and relates to a chair that can be used as a chair and that can be used for a nap or lying down, and can be used for viewing, viewing, and the like.

  Conventionally, office chairs are known. The office chair includes a leg standing from the floor, a seat held by the leg and seated by a person, and a backrest receiving and holding the back of the person sitting. Yes. Usually, it is arranged in front of a desk, and a person can sit on an office chair and perform office processing, personal computer operation, etc. toward the desk.

  By the way, the conventional office chair is based on the premise that office processing is performed while a person is sitting, and even if the backrest is tilted, the person is temporarily relaxed within a range of about 45 degrees from the vertical. It was possible. Therefore, it has been difficult to take a nap by using this office chair as a bed.

  Further, tilting the backrest to the level as it is while maintaining the seat at the height position of the person's seating may be dangerous considering the case where the person falls from the head. Many office chairs can be easily moved by a caster or the like, and the seat can be rotated around a support column. And since the area that can be used as a bed can only be made smaller than that of a normal bed, it is necessary to carefully take measures against instability particularly when the bed is used.

  Furthermore, in order for such office chairs to be widely spread, it is desirable that the structure is simple and inexpensive.

  Furthermore, as long as it is an office chair, it is desired to have multifunctionality such as being able to continue to operate a personal computer, view a telephone, view a television, etc. in an easy posture even when lying down.

  Furthermore, it is desirable that the user can easily perform the transformation from the chair to the bed with little force without standing up from the chair.

  The present invention has been made in view of such a conventional problem, and can be used as a chair, and can be used for a nap or lying down in an information processing device, viewing, and the like. The purpose is to provide.

  For this reason, the present invention (Claim 1) can be used as an office chair headed to a desk or the like, while having both functions for office and bed that can be used as a bed when the backrest is tilted. A seat that can be seated by a person, and a single leg that is attached to the back of the seat and that can be adjusted in height from the floor and is not fixed to the floor and is movable. A backrest portion for receiving and holding the back of the person, a rotation restricting means for restricting an angle of the backrest portion with respect to the seat portion to be equal to or greater than a first angle, and a restriction of the rotation restricting means. The rotation restriction releasing means to be released, and the restriction being released by the rotation restriction releasing means, whereby the backrest portion is at a second angle beyond the first angle with respect to the seat portion. A nap that can be tilted to a comfortable or napable angle and can be stopped The degree adjusting means is disposed on the seat portion and / or the backrest portion, folded in a plurality of stages, and overlapped so as to be expanded and / or slidable, and continuously provided after the expansion and / or sliding. And an extension means having an auxiliary extension member that can be extended so as to have an area that can hold the whole body from a person's feet to the head as a bed.

  The leg portion only needs to hold the seat portion from the floor surface and can be moved without being fixed to the floor surface. The angle of the backrest with respect to the seat can be stopped at a predetermined angle. The predetermined angle may be one fixed angle position determined, or may be changeable in a plurality of steps or continuously. In any case, the angle of the backrest with respect to the seat is regulated so as not to tilt more than the first angle. The restriction to prevent tilting beyond this first angle prevents the entire center of gravity from moving backward due to the weight of the person's head and preventing the legs from falling off the floor. It is to do. Thus, the first angle is approximately equal to the maximum angle of tilt applied to a normal chair. By being used within the first angle, it can be used as a chair facing a desk or the like. Then, by releasing this restriction manually or automatically, the backrest portion can be further tilted beyond the first angle to the second angle, and the tilt position can be stopped. Such an angle range is an optimal angle at which a person can almost extend his posture and take a nap easily or comfortably. Therefore, it is most desirable that the angle be held at the horizontal angle in terms of the same feeling as the bed, but it is not limited to the horizontal angle as long as a person can extend the posture almost easily. You may make it have a fixed inclination angle.

  As described above, it is possible to easily take a nap by tilting the backrest portion when the user is tired while being safely used as a chair.

  Further, the present invention provides a seat housing for storing the seat at a position where the person can be seated when the backrest is tilted back to a fourth angle in the vertical direction with respect to the seat. A means may be provided.

  This avoids the danger of a person suddenly sitting at a high position, losing back support and falling, with the backrest part not being returned to the fourth angle, which is the angle that can hold the person's back. Can do.

  Further, the present invention provides the seat portion and / or the backrest portion or the predetermined portion of the extended portion after the expansion and / or sliding with the floor surface while being tilted and stopped by the angle adjustment means such as the nap. You may comprise with the auxiliary leg which contact | abuts.

  It is stable by being supported by the auxiliary leg, and a nap or the like can be performed safely.

  Furthermore, the present invention is provided with armrests that can hold the person's elbows on the left and right sides of the seat or the backrest, the armrest being attached to the seat or the backrest, the front It may be configured to include an adjustment means such as an armrest position that can adjust at least one of the drawing length toward the head, the inclination angle, and the distance between the left and right armrest portions.

  Since the position adjusting means is provided, the armrest portion does not get in the way when the second angle is reached. Also, since the position of the armrest can be adjusted according to the height of the person's sitting height, individual differences, etc., it is possible to maintain a comfortable posture of the person.

  Furthermore, the present invention provides a seat portion on which a person can sit, a leg portion that holds the seat portion from the floor, a backrest portion that receives and holds the back of the person, and left and right sides of the seat portion or the backrest portion. An armrest portion that can hold the person's elbow disposed on both sides, and a keyboard or other holding base that can hold a keyboard or the like may be provided between the left and right armrest portions.

  By providing a holding base such as a keyboard, a person can operate a personal computer while lying down and can function as a simple desk. Moreover, it is desirable that the keyboard or the like is detachable from the armrest.

  Further, in the present invention, the auxiliary extension member is housed in the seat portion and the backrest portion or a bottom surface of the seat portion and the backrest portion so that the auxiliary extension member can be bent via a bendable portion. A drawer part that protrudes from the seat part to support a person when the backrest part is arranged on a substantially same plane as a bed, and a drawer part moving means for projecting or storing the drawer part from the seat part. May be configured.

  The seat portion may be rotatable in a horizontal plane with respect to the leg portion, or may be fixed. Further, the leg portion may be movable or fixed with respect to the floor surface. The number of struts is not limited to one, but may be a plurality of forms such as four legs. Since the drawer is housed inside or on the bottom of the seat surface, the user can move the drawer without standing up from the chair. The drawer part may draw out the drawer part housed inside the seat part and the backrest part from the tip of the seat part, or may be pulled out from the tip of the backrest part. Or you may make it draw out the drawer | drawing-out part of the two members isolate | separated in the backrest part and the seat part in a different direction from a head part and a seat part. In that case, the reclining angle of the backrest can be arbitrarily set and used as a bed. Therefore, it is possible to watch TV etc. in a relaxed posture. In addition, when pulling out in the same direction, a bendable portion that can be bent in only one direction is provided in the pullout portion when the chair is used. When the drawer part is pulled out, the level difference between the drawer part and the seating surface may be alleviated by covering the stepped part, or the drawer part may be lifted upward to unify the seating surface. . In addition, the drawer movement means is provided with a movement lock and release means, so that it is possible to prevent an unexpected operation and perform a reliable operation.

  As described above, it is possible to provide a chair that can be easily and safely transformed into a bed while the user is sitting on the chair. In addition, you may arrange | position an auxiliary leg as support with respect to a drawer | drawing-out part. The auxiliary leg may be installed in conjunction with the angle of the backrest part or the movement of the drawer part, or may be installed manually.

Further, according to the present invention, the drawer moving means includes an armrest that is movable back and forth of a person and a distance amplifying means that can amplify the movement distance of the armrest, and the movement distance amplified by the distance amplifying means. Accordingly, the drawer portion may be protruded or stored.
Furthermore, the present invention may be characterized in that the auxiliary extension member can protrude or be retracted from the seat portion and the backrest portion, respectively.
Further, in the present invention, when the drawer part or the auxiliary extension member protrudes from the inside of the seat part or the backrest part or the bottom part, the drawer part or the auxiliary extension member projects and automatically drops in conjunction with the drawer part or the auxiliary extension member, You may comprise with the auxiliary leg which is fixed after earth | grounding and hold | maintains the said drawer | drawing-out part.

  Since the auxiliary leg is installed in conjunction with the drawer portion, it is not necessary for the user to manually install the auxiliary leg, and the auxiliary leg can be installed easily and safely.

Furthermore, the present invention may include an auxiliary leg that is automatically opened or closed according to the inclination angle of the backrest.
By linking the auxiliary leg to the angle of the backrest, a person can move to the second angle even when seated.
Further, according to the present invention, the auxiliary extension member is folded in a plurality of stages and overlapped so as to be expanded and / or slidable. After the expansion and / or sliding, the auxiliary extension member is continuously provided, It is good also as having the sufficient area which can cover the whole from a head to a head.
Thereby, it is possible to easily shift from the chair state to the bed state with a simple structure.
Further, according to the present invention, the restriction applied so as not to fall over the first angle is released when the seat part and / or the backrest part is expanded and / or slid. By being released, the backrest part can be further tilted and stopped to an angle at which the person can comfortably or take a nap beyond the first angle with respect to the seat part, which is the second angle. Also good.
As a result, it is possible to avoid the danger that the backrest portion first shifts to the second angle and the person sitting at a high position loses the support behind and falls.
Furthermore, the present invention provides a height which enables the height adjustment of the seat portion with respect to the floor surface again after the backrest portion is tilted back to the third angle in the vertical direction with respect to the seat portion. A thickness adjusting lock releasing means may be provided.
When the seat is lowered to a predetermined height with respect to the floor, the seat can be tilted to the second angle, or the seat back can be adjusted to the height after the backrest has been tilted back to the third angle. By making it possible again, it is safe even if a person falls off the chair due to an unexpected situation such as in the middle of a nap.
Furthermore, the present invention provides a height adjusting means disposed on the leg portion and capable of adjusting a height position of the seat portion with respect to the floor surface, and the height adjusting means allows the seat portion to reach a predetermined height. It may be configured to include an operating height regulating means that allows the drawer moving means to be operated when lowered.

  Since the drawer cannot be protruded unless the chair is lowered to a predetermined height, the bed is always used at a low position, and can be used stably at a low center of gravity. It is safe even if it falls down due to unforeseen circumstances.

  Further, in the present invention, the leg portion may be configured to hold the seat portion with a single column, and the seat portion may be rotatable about the column.

  A caster may be disposed on the leg. It can be used easily as a chair.

  Further, according to the present invention, the backrest part may be provided with a pillow part for holding the person's head.

  The pillow part is preferably hidden behind the backrest part during use as a chair. Moreover, it is desirable that the pillow part be detachable.

  Furthermore, the present invention is capable of holding an information processing terminal or a book or the like that is disposed at the seat portion or the backrest portion and an end portion of the arm and includes image means and / or sound means. A holding means may be provided.

  The information processing terminal is, for example, a television, a mobile phone, a game machine, a personal computer monitor, or the like. When used as a personal computer, it is desirable to place a mouse or the like in a proper position on the chair. While lying down, people can enjoy the Internet, play games, and work on computers. The voice means may be arranged on the chair side or the pillow part.

  As described above, according to the present invention, it is possible to use as a chair, and to use or view information processing equipment in a nap or lying posture.

  In addition, the bed can be easily transformed into a nap when the user is sitting on a chair.

Whole side view of 1st Embodiment of this invention AA arrow line sectional view in FIG. BB cross-sectional view in FIG. Enlarged view around the seat Vertical section of the reclining adjustment unit CC arrow sectional view in FIG. Enlarged view of L-shaped hook Enlarged view of lever mechanism Enlarged view of the armrest joint DD arrow line sectional view in FIG. Enlarged view of armrest retaining plate Difference in groove shape depending on the height of the chair body Bed development according to the first embodiment of the present invention Whole side view of 2nd Embodiment of this invention Whole sectional drawing of 2nd Embodiment of this invention GG arrow sectional view in FIG. Partial rear view around the angle lock mechanism Enlarged view around the angle lock mechanism Enlarged view of the locking mechanism around the angle lock mechanism Whole side view of 3rd Embodiment of this invention Overall rear view of the third embodiment of the present invention HH arrow cross-sectional view in FIG. A sectional view taken along line II in FIG. Enlarged view of reclining lock plate stopper Bed development according to the third embodiment of the present invention Whole side view of 4th Embodiment of this invention Enlarged exploded view of screw position guide plate JJ arrow line sectional view in FIG. State relationship between the angle of the backrest and the screw position guide plate Bed development according to the fourth embodiment of the present invention A plan view around the armrest portion of the fifth embodiment of the present invention Side view around the armrest portion of the fifth embodiment of the present invention Enlarged view of the end of the mating plate Enlarged view of the hanging part of the extension KK arrow sectional view in FIG. Peripheral plan view of the keyboard base MM arrow sectional view in FIG. NN arrow cross-sectional view in FIG. Sectional view with keyboard installed Overall view of the elbow pad cushion Overall schematic diagram of a sixth embodiment of the present invention 41. O arrow view in FIG. A cross-sectional view taken along line PP in FIG. Setting procedure of arm type support base Simplified diagram of various devices that can be connected to the chair body Simplified side view of the seventh embodiment of the present invention. Simplified side view of the eighth embodiment of the present invention. Simplified side view of the ninth embodiment of the present invention. Simplified side view of the tenth embodiment of the present invention. Configuration diagram of eleventh embodiment of the present invention Enlarged sectional view of the fitting part of the mouse base Operation board setting procedure diagram Cross section of operation table and mouse table Overall side view of a twelfth embodiment of the present invention Whole perspective view of drawer Enlarged view of bed legs 54 is a cross-sectional view taken along the line TT in FIG. 54 is a sectional view taken along line U-U in FIG. Enlarged view of the drawer bar Partial enlarged view of the bendable part of the drawer Reclining horizontal view of the chair body Side view when drawer is pulled out 54 is a cross-sectional view taken along line VV in FIG. Α-α arrow cross-sectional view in FIG. Gear train peripheral configuration diagram 57 is a cross-sectional view taken along line WW in FIG. XX arrow sectional drawing in FIG. Partial enlarged view of the ratchet mechanism Cross section of the backrest YY arrow cross-sectional view in FIG. Z arrow view in FIG. Simplified view around the seat showing the gear locking mechanism Enlarged simplified view of the connection between the seat and backrest FIG. 63 shows the unlocked state of the sliding lock mechanism. State change diagram when the drawer protrudes State change figure when bed legs are installed Sectional view of the seat when the operating lever is inserted Bottom view of the seat when the control lever is inserted Simplified view around the seat when the gear locking mechanism is released Simplified side view of the thirteenth embodiment of the present invention. Sectional drawing of the seat part in 13th Embodiment of this invention The perspective view of the drawer | drawing-out part in 13th Embodiment of this invention. Simplified side view with a drawer on the bottom Simplified side view when the drawer is separated 84. Enlarged view of the end of the backrest in FIG.

  The first embodiment of the present invention will be described below. 1 is a side view of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG.

  The chair main body 1 includes a seat portion 3 and a backrest portion 5. The seat 3 can be freely set by the leg 7. An armrest 9 is attached to the backrest 5 so that the height can be adjusted.

  A caster 12 is attached to the leg 7, and the chair body 1 is freely movable. However, the leg portion 7 is not limited to being movable, and the caster 12 portion may be a fixed leg such as four legs (hereinafter the same as each embodiment).

  At both ends of the rear portion of the seat plate 11, ring-shaped support portions 36 are projected. Both end portions of a support rod 37 are inserted into the ring-shaped support portion 36 and are fitted so as to be rotatable.

  The support rod 37 is joined to the lower end of the back plate 13, and in conjunction with the rotation of the support rod 37, the back plate 13 rotates about the support rod 37 and the backrest portion 5 is brought down. ing.

  The back plate 13 is provided with two cavities 38 in the vertical direction. A back plate support spring 39 is embedded in the cavity 38. The back plate support spring 39 has an upper end engaged with the wall surface formed by the cavity 38 and a lower end engaged with the seat plate 11 to ensure cushioning for reclining.

  The seat 3 includes a leg 3 and a bottom 3A to which the backrest 5 is attached, and auxiliary extensions 3B and 3C. The auxiliary extensions 3B and 3C are normally folded on the bottom 3A when the chair is used.

  The leg portion 7 includes a grounding portion 7A that is grounded to the ground and a movable portion 7B that is joined to the bottom portion 3A. The movable portion 7B can be adjusted to an arbitrary height by sliding in the cylinder of the grounding portion 7A. It has become. Further, the shaft portion of the grounding portion 7A can be freely rotated.

  Auxiliary legs 18 and 19 for using the bed are attached to the upper end side portion of the backrest portion 5 and the distal end side portion of the auxiliary extension portion 3C, respectively.

  Further, reclining adjustment portions 20 that are engaged with the back position adjustment lever 10 for adjusting the angle of the backrest portion 5 are attached to both side portions of the bottom portion 3A. The other end of the back position adjusting lever 10 is pivotally supported by the side surface of the backrest 5 and a back lever screw 14.

  FIG. 4 is an enlarged view of the periphery of the bottom 3A and the auxiliary extensions 3B and 3C. FIG. 4 (a) is a normal chair, and FIG. 4 (b) is a state in which the auxiliary extensions 3B and 3C are opened and extended. It is.

  The bottom 3A and the auxiliary extension 3B, and the auxiliary extensions 3B and 3C are locked by hinges 4a and 4b so as to be freely opened and closed, and the connection between the bottom 3A and the auxiliary extension 3B is reinforced by the reinforcing rod 15.

  One end 15a of the reinforcing rod 15 is locked to the bottom portion 3A so as to be rotatable and slidable, and a reinforcing rod groove 16 is formed for sliding the end portion.

  The other end of the reinforcing rod 15 is pivotally locked to the auxiliary extension 3B. In conjunction with the movement of the auxiliary extension 3B, the reinforcing rod 15 rotates and slides in the reinforcing rod groove 16.

  When the bottom portion 3A and the auxiliary extension portion 3B become horizontal, the reinforcing rod 15 also becomes horizontal, and is fitted into L-shaped hooks 17A and 17B that protrude from the bottom portion 3A and the auxiliary extension portion 3B, respectively. . An enlarged view of the L-shaped hook 17 is shown in FIG.

  Next, the reclining mechanism will be described. FIG. 5 is a longitudinal sectional view of the reclining adjusting unit 20, and FIG. 6 is a sectional view taken along the line CC in FIG. The reclining adjustment part 20 is formed in a box-shaped space by two reclining adjustment plates 21 and a ceiling part 25 which are erected in parallel.

  The reclining adjustment plate 21 includes two parts, a front part and a rear part, and includes a front part 21A joined to the seat plate 11 and a rear part 21B joined to the grounding part 7A of the leg part 7. 21A and the rear part 21B are slidably contacted on the contact surface 21b.

  On the inner side surface 21 a of the reclining adjustment plate 21, a lever slide groove 22 and a support plate slide groove 24, which is distorted upward at the front, are horizontally engraved vertically.

  A plurality of key-like lever locking grooves 23 are formed on the upper surface of the lever slide groove 22 so as to communicate with the lever slide groove 22. The engraved position of the lever locking groove 23 corresponds to the reclining angle of the backrest 5 and is arranged so that the interval becomes narrower toward the rear.

  The lever locking groove 23 carved in the front portion 21A of the reclining adjustment plate 21 corresponds to the reclining angle when the chair is used, for example, up to about 120 degrees. On the other hand, the lever locking groove 23 formed in the rear portion 21B corresponds to a reclining angle when using the bed, for example, from about 140 degrees to 180 degrees.

  A lever mechanism 30 is provided inside the reclining adjuster 20. The lever mechanism 30 includes an operation lever 31, a locking rod 32, a support rod 33, a lever spring 34, and a lever spring locking plate 35. FIG. 8A is an enlarged side view of the lever mechanism 30.

  In FIG. 6, the locking rod 32 is bridged between two reclining adjustment plates 21, the operation lever 31 is disposed at one end, and the back position adjustment lever 10 is coupled to the other end.

  The locking rod 32 is connected to the lever spring 34 by a support bar 33. When the operating lever 31 is slid and removed from the lever locking groove 23 and pushed downward, the lever spring 34 contracts and the locking rod 32 moves to the lever sliding groove 22. The locking rod 32 slides back and forth in the lever slide groove 22.

  The lower part of the lever spring 34 is fixed to the lever spring locking plate 35. The lever spring locking plate 35 slides in the support plate sliding groove 24 in accordance with the movement of the upper locking rod 32.

  As shown in FIG. 8A, the lever spring locking plate 35 includes a main body 35a and two small plates 35b and 35c on the front side that can be bent only upward. Each lever spring support plate has a contact end portion on the upper surface connected by a hinge.

  FIG.8 (b) is an expanded sectional view when it is bent in a hinge part. The tip of the support plate sliding groove 24 has a distorted portion 24a that is gently distorted upward. When the lever mechanism 30 is locked in the foremost lever locking groove 23, the lever spring The bendable portion of the locking plate 35 is bent and stored in the distorted portion 24a.

  Next, the armrest portion 9 will be described. FIG. 9A is an enlarged view of a joint portion between the armrest portion 9 and the backrest portion 5, and FIG. 9B is a rear view. Moreover, Fig.10 (a) is DD arrow sectional drawing in FIG.9 (a), FIG.10 (b) is EE arrow sectional drawing in FIG.10 (a).

  As shown in FIG. 10A, the armrest holding plate 42 is embedded in the backrest 5, and a part of the surface, 42 a, protrudes to the side of the backrest 5. The embedded portion 42b is slidable in the width direction with respect to the chair body 1 as indicated by an arrow in the figure.

  Further, a projecting portion 42 c projects from the upper and lower inner ends of the embedded portion 42 b of the armrest holding plate 42. In the backrest 5, guide grooves 6 are formed in the surfaces 5 b and 5 c inscribed in the armrest holding plate 42.

  The protrusion 42c slides inside the guide groove 6. In addition, a stopper 6a protrudes from the protrusion 42c in the opening 5d of the backrest 5.

  On the side surface of the backrest portion 5, an armrest holding plate 49 is disposed so as to be hooked on the protruding portion 42 a of the armrest holding plate 42. An enlarged view of this part is shown in FIG. 11 (a) and 11 (c) are a left side view and a right side view, respectively, and FIG. 11 (d) is a cross-sectional view taken along line FF in FIG. 11 (a).

  The armrest retaining plate 49 is secured to the side surface of the backrest 5 by an armrest retaining screw 50. A notch 49a is formed in a portion of the armrest holding plate 42 so that the protruding portion 42a of the armrest holding plate 42 comes into contact therewith.

  When the armrest holding plate 49 is hung on the armrest holding plate 42, the armrest holding plate 42 is prevented from protruding from the backrest portion 5.

  When the armrest retaining plate 49 is slid in the direction of the arrow in FIG. 9A around the armrest retaining screw 50, the armrest holding plate 42 can freely protrude from the backrest portion 5. ing.

  The armrest holding plate 42 is provided with an armrest adjusting groove 48. The armrest adjustment groove 48 includes a slide portion 48a cut in the vertical direction and a lock portion 48b cut in a key shape to lock the screw. The locking portions 48b are arranged at equal intervals on the side portion of the slide portion 48a.

  The height of the armrest main body 40 can be adjusted by fastening the armrest holding screw 45 with a screw at an arbitrary locking portion 48b.

  An angle adjusting groove 41 is formed outside the armrest main body 40, and one end of an angle adjusting rod 43 is screwed to the angle adjusting groove 41 by an armrest angle screw 46.

  The other end of the angle adjusting rod 43 is secured to the armrest holding plate 42 at an arbitrary position below the armrest holding screw 45 that locks the armrest main body 40 with an angle rod screw 47, and the armrest holding The angle of the armrest portion 9 can be adjusted by the three points of the screw 45, the armrest angle screw 46, and the angle rod screw 47.

  At the time of angle adjustment, the armrest angle screw 46 can be slid in the angle adjustment groove 41, so that it can be slid to an appropriate position and fixed with a screw.

  In FIG. 1, a pillow portion 55 is disposed on the upper back portion of the backrest portion 5. In this pillow part 55, one end of a pillow part rotation rod 58 is pivotally fixed to a pillow body 57 so as to be rotatable. The other end of the pillow part rotation rod 58 is pivotally supported by the pillow part rotation support screw 59 on the upper end side part of the backrest part 5, and the pillow part 55 and the backrest part 5 are temporarily fixed by a magnet or the like. Yes.

  When the pillow is used, the pillow portion 55 is rotated around the pillow portion rotation support screw 59 and is brought into contact with the front surface of the backrest portion 5. The pillow main body 57 and the pillow part rotation rod 58 are detachable, and can be used outside the head as required by the user.

  Next, the effect | action in 1st Embodiment of this invention is demonstrated. By moving the lever mechanism 30 to each lever locking groove 23, the backrest 5 can be reclined at an arbitrary angle.

  FIG. 12 shows the difference in groove shape depending on the height of the chair body 1. As shown in FIG. 12 (a), the lever slide grooves 22 of the reclining adjustment plate front part 21A and the rear part 21B communicate with each other only when the height of the chair body 1 is lowered to the lowest position.

  This is because, by lowering the height of the chair body 1 to the lowest position, it is possible to suppress the damage of the accident due to the fall of the user, etc., and consider safety.

  Here, the lever mechanism 30 slides the lever slide groove 22 communicated with the lever mechanism 30 and locks it in the lever locking groove 23 in the rear part, so that the backrest 5 can be brought down to the bed state.

  When the lever mechanism 30 is locked in the lever locking groove 23 carved in the reclining adjustment plate rear portion 21B, as shown in FIG. 12A, the lever spring locking plate 35 is connected to the front. The height of the chair body 1 cannot be changed because the support plate sliding groove 24 of the portion 21A and the rear portion 21B is bridged.

  Further, as shown in FIG. 12B, the lever slide groove 22 is not connected to the rear portion 21A from the reclining adjustment plate front portion 21A because the lever slide groove 22 is not communicated while the chair body 1 is not lowered to the lowest position. Cannot slide to 21B.

  Therefore, when the seat part 3 exists in a high position, it can prevent falling the backrest part 5 too much.

  In order to change from the chair state to the bed state, the chair body 1 is first lowered to the lowest position, the auxiliary extension portions 3B and 3C of the seat portion 3 are spread, and the auxiliary legs 19 are raised. Thereafter, the backrest 5 is tilted and the auxiliary leg 18 is raised.

  FIG. 13 is an overall view when the bed is unfolded at this time. FIG. 13A shows a state in which only the seat portion 3 is extended, and it is possible to use it as a chair in this state. FIG. 13B shows a state where the backrest 5 is further tilted to be in a bed state.

  At this time, as shown in FIG. 13, the back position adjustment lever 10 may also be grounded so that the chair body 1 can be supported. More stable use is possible by increasing the number of support points.

  Further, by sliding the armrest holding plate 49 when using the bed, the armrest portion 9 can be expanded to any width of the user, and the comfort of the user is not impaired.

  As described above, it is possible to provide an office chair that can be used as an easy chair or a bed by a simple operation and can be relaxed while having a sufficient function and structure as a work chair.

  A cover may be attached around the reclining adjustment unit 20 and the back position adjustment lever 10.

  Further, the pillow part 55 may be attached with a cover that can be removed and washed.

  Moreover, you may provide the space which accommodates an electric blanket etc. so that it can be used at the time of a nap. This space can be dealt with by setting a pocket on the back surface of the backrest portion 5 and the lower surface of the seat portion 3, and creating spaces between the respective portions of the folded seat portion 3.

  The cover of the pillow part 55 and the electric blanket storage space are the same in each embodiment below.

  Next, a second embodiment of the present invention will be described. FIG. 14 is an overall side view of the present invention, and FIG. 15 is an overall cross-sectional view. In this embodiment, the deployment method of the seat 3 from the chair to the bed, the adjustment of the armrest 9, the adjustment of the pillow 55 and the like are the same as those of the first embodiment, and the same elements are denoted by the same reference numerals. Therefore, the description is omitted.

  The present embodiment is characterized in that the backrest 5 is reclined by the back angle screw 51 and can be screwed at a free angle. Further, for the sake of safety, it is characterized by having an angle lock mechanism 60 that can be deployed on the bed only when the height of the chair is lowered to the lowest position.

  The angle lock mechanism 60 includes an angle lock spring 63 that forms a spring mechanism, a spring chamber 65 in which a retaining plate 66 is housed, and an angle locking plate 53 that contacts the retaining plate 66 and restricts the movement of the backrest portion 5. It is configured.

  The angle lock plate 53 is disposed on the back surface of the backrest portion 5. The angle lock plate 53 includes a surface 53a that is perpendicular to the ground when the backrest 5 is at a certain angle, for example, 45 degrees, and a surface 53b that is horizontal to the ground when it reaches a horizontal state. have.

  16 is a cross-sectional view taken along the line G-G in FIG. 14, and FIG. 17 is a partial rear view around the angle lock mechanism 60. A spring chamber 65 is formed at the bottom 3 </ b> A of the seat 3 and the lower part of the backrest 5. The upper surface 66 a of the holding plate 66 is joined to the lower end of the angle lock spring 63, and the upper end of the angle lock spring 63 is attached to the ceiling wall portion of the spring chamber 65.

  FIG. 18 is an enlarged view around the angle lock mechanism 60. 18A shows a state when the chair is used, and FIG. 18B shows a state when the chair body 1 is lowered to the lowest position and the backrest part 5 is tilted to the horizontal state.

  A surface 66c on the leg 7 side of the holding plate 66 is a curved surface and comes into contact with the side surface of the movable portion 7B of the leg 7.

  A hollow disc 67 is disposed on the circumference of the upper end portion of the grounding portion 7A of the leg portion 7. The disk 67 approaches the seat portion 3 while the height of the chair body 1 is lowered, and comes into contact with the retaining plate 66.

  Next, the operation of the second embodiment of the present invention will be described. As shown in FIG. 18A, when the height of the chair body 1 is not at the lowest position, the retaining plate 66 protrudes from the spring chamber 65. In this state, when the backrest 5 is tilted down and the surface 53a of the angle lock plate 53 disposed on the backrest 5 becomes vertical to the ground, the rear surface 66b and the surface of the protruding retaining plate 66 project. 53a contacts.

  Further, when the backrest 5 is to be tilted down, the surface 53a of the angle lock plate 53 presses the surface 66b of the retaining plate 66 in the left direction in the figure. However, since the surface 66c is in contact with the leg portion 7, it cannot be moved and the backrest portion 5 cannot be tilted any further. The situation at this time is shown in FIG.

  As shown in FIG. 18B, when the height of the chair body 1 is lowered to the lowest position, the backrest 5 can be brought down to a horizontal state. At this time, the disc 67 of the leg 7 pushes the retaining plate 66 into the upper spring chamber 65 and abuts against the lower surface of the bottom 3 </ b> A of the seat 3.

  Since the retaining plate 66 is housed in the spring chamber 65, the movement of the surface 53a of the angle lock plate 53 is released, and the backrest 5 can be further tilted. The angle lock plate 53 when in the horizontal state enters below the bottom 3 </ b> A, and the surface 53 b of the angle lock plate 53 comes into contact with the lower surface of the disk 67.

  Therefore, even if it tries to raise the height of the chair main body 1 in that state, the surface 53b of the angle lock plate 53 is locked, and the height cannot be changed. In order to change the height, the backrest portion 5 must be raised and the surface 53b must be removed from the lower surface of the disk 67.

  As described above, an office chair having a safety-friendly locking mechanism that can be deployed to a bed for the first time in a low position and prevents the height of the bed from being raised is simply structured. Therefore, it can be provided at a low cost.

  For example, an L-shaped member that hangs down from the ceiling of the spring chamber 65 and supports the bottom of the retaining plate 66 may be disposed on the peripheral portion of the angle lock spring 63.

  This member can support expansion and contraction of the angle lock spring 63 by adopting a two-part structure that can expand and contract according to the distance between the ceiling portion of the spring chamber 65 and the retaining plate 66. Therefore, deterioration of the angle lock spring 63 is prevented, and more stable movement of the angle lock mechanism 60 is realized.

  Next, a third embodiment of the present invention will be described. 20 is an overall side view of the present invention, and FIG. 21 is an overall rear view. Further, FIG. 22 is a cross-sectional view taken along line HH in FIG. The present invention is characterized in that a reclining lock 90 is disposed on the side of the chair body 1 and the backrest 5 cannot be tilted horizontally unless the auxiliary extensions 3B and 3C of the seat 3 are deployed.

  The deployment method of the seat portion 3, the adjustment method of the armrest portion 9, the pillow portion 55, and the like are the same as those of the first embodiment, and the same elements are denoted by the same reference numerals and description thereof is omitted.

  The chair body 1 includes a seat portion 3, a backrest portion 5, and a leg portion 7. A seat plate 11 is embedded in the seat portion 3, and a back plate 13 is embedded in the backrest portion 5, and the seat plate 11 and the back plate 13 are pivotally supported by a back angle screw 51.

  A caster 12 is disposed on the leg portion 7, and the chair body 1 is freely movable. Further, it can be rotated with respect to the seat portion 3.

  The backrest part 5 includes a base part 5A that determines an inclination angle and a swing part 5B that can swing according to the weight movement of the user.

  The back plate 13 is a single sheet for both the parts, and the angle is determined by the base 5A. The swinging portion 5B can swing with respect to the inclined back plate 13.

  The back plate 13 includes a holding plate 13A that is housed in communication with both the base portion 5A and the swing portion 5B, a swing portion back plate 13B that supports the entire surface of the swing portion 5B, and a swing plate 13A. It is comprised from the rocking | swiveling mechanism 75 which connects the part back board 13B.

  The swing mechanism 75 includes a horizontal support shaft 76 and a swing plate 78. The swing plate 78 includes a cylindrical cavity 78a through which the horizontal support shaft 76 passes, and a holding plate for the back plate 13. A cutout portion 78b for swinging 13A is provided.

  Therefore, the swinging plate 78 can freely rotate around the horizontal support shaft 76 and is interlocked with the movement of the user.

  Next, the reclining lock 90 will be described. FIG. 23 is a cross-sectional view taken along the line II in FIG. The lock plate 97 is attached to both sides of the auxiliary extension 3 </ b> B of the seat 3. Since the auxiliary extension 3 </ b> B is folded when the chair is used, the lock plate 97 is inserted into the lock notch 92.

  In the vicinity of the restoring spring 94 of the reclining lock plate 91, a spring notch 96 for moving the restoring spring 94 is provided on the chair side half in the thickness direction. Since one end of the restoring spring 94 is fixed to the outer wall surface of the notch 96 for spring, it moves with the movement of the reclining lock plate 91.

  The other end of the restoring spring 94 is stopped on the side of the bottom 3A of the seat 3 so as to be urged to the left in the figure. A reclining lock plate stopper 98 is attached to the side portion of the bottom 3 </ b> A of the seat portion 3 so as to come into contact with the left end surface of the reclining lock 90.

  FIG. 24A shows an enlarged view of the reclining lock plate stopper 98, and FIG. 24B shows a projection view. The reclining lock plate stopper 98 has a notch 98 a for accommodating the restoring spring 94.

  Next, the operation of the third embodiment of the present invention will be described. When the chair is normally used, the swinging portion 5B of the backrest 5 can swing freely around the swinging mechanism 75 as shown by the arrow in FIG. Is possible.

  Further, when the lock plate 97 attached to the auxiliary extension portion 3 </ b> B of the seat portion 3 is fitted in the lock cutout portion 92, the reclining lock plate 91 cannot rotate. At this time, the position of the lock rod 93 is in a position where it comes into contact with the back surface 5a when the backrest portion 5 is tilted to a predetermined angle and cannot be tilted any further.

  When the chair body 1 is used as a bed, the seat portion 3 is first developed. At this time, since the lock plate 97 attached to the auxiliary extension portion 3B is disengaged from the lock notch portion 92, the reclining lock plate 91 can freely rotate.

  In this state, when the backrest part 5 is tilted down, the lock rod 93 is also movable together with the back surface 5a of the backrest part 5 in contact. Therefore, the movement of the backrest part 5 is not hindered.

  Therefore, the backrest part 5 can be tilted down horizontally and can be used as a bed. FIG. 25 shows a side view when the bed is used.

  As described above, it is possible to provide an office chair that can be safely transformed from a chair to a bed with a simple configuration.

  Next, a fourth embodiment of the present invention will be described. FIG. 26 is an overall side view of the present invention. The same elements as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. Further, the method of deploying from the chair to the bed, adjustment of the armrest portion 9, adjustment of the pillow portion 55, and the like are the same as in the first embodiment.

  In the present invention, when reclining the backrest 5 with the back angle screw 51 on the side, the auxiliary leg 18 moves in accordance with the reclining of the backrest 5 and automatically protrudes as a leg when in the bed state. It is characterized by.

  The chair body 1 includes a seat portion 3, a backrest portion 5, and leg portions 7. The seat portion 3 includes a back portion 5 and a bottom portion 3A connected to the leg portion 7, and auxiliary extension portions 3B and 3C folded on the upper surface thereof. Further, a caster 12 is disposed on the leg portion 7 so as to be freely movable.

  One end of the auxiliary leg 18 is pivotally supported by an auxiliary leg screw 80A in the vicinity of the center of both side surfaces of the backrest 5. The other end is pivotally supported by one end of the auxiliary leg operating rod 81 and an auxiliary leg screw 80B. An auxiliary leg screw 80 </ b> C is attached to the other end of the auxiliary leg operating rod 81 at the lower end of the backrest 5.

  The screw position guide plate 85 includes an inner plate 85A having an arcuate sliding hole 86 and an outer plate 85B having a vertical sliding hole 87 formed therein. FIG. 27A shows a plate 85A of the screw position guide plate 85, and FIG. 27B shows an enlarged exploded view of the plate 85B. FIG. 28 is a cross-sectional view taken along line JJ in FIG.

  The holes of the screw position guide plates 85A and 85B overlap with each other, and the auxiliary leg screw 80C is passed through the communicating position. The head of the auxiliary leg screw 80C protrudes from the screw position guide plate 85B and is formed so as not to come out of the hole.

  The back angle screw 51 passes through the screw position guide plate 85A and is tightened from the outside. Further, since the backrest part 5 is fixed, the backrest part 5 rotates around the back angle screw 51 as the backrest part 5 moves.

  The length of the auxiliary leg operating rod 81 is longer than the length between the auxiliary leg screw 80A and the auxiliary leg screw 80C, and the auxiliary leg screw 80B is located closer to the upper end side of the backrest part 5 than the position of the auxiliary leg screw 80A. positioned.

  Next, the operation of the fourth exemplary embodiment of the present invention will be described. FIG. 29A shows the state of the screw position guide plate 85 when the backrest 5 is vertical, and FIG. 29B shows the state when it is horizontal.

  As shown in FIG. 29A, when the backrest 5 is in the vertical state, the sliding holes 86 and 87 of the screw position guide plate 85 and the plates 85B overlap at the uppermost position. Therefore, the auxiliary leg screw 80C is located farthest from the back angle screw 51, and the auxiliary leg 18 and the auxiliary leg operating rod 81 are in a folded state.

  When the backrest 5 is tilted down, the plate 85A of the screw position guide plate 85 is also rotated in conjunction with it. At this time, the arcuate sliding hole 86 provided in the plate 85A also rotates, so that the position where the sliding hole 87 of the plate 85A and the sliding hole 86 of the plate 85B overlap moves downward.

  Therefore, the position of the auxiliary leg screw 80C moves downward as the backrest part 5 becomes horizontal, and the auxiliary leg operating rod 81 slides downward. In conjunction with this, the auxiliary leg screw 80B also moves downward. However, since the auxiliary leg screw 80B is pivotally supported by the auxiliary leg 18, the downward movement is converted into a circular movement around the auxiliary leg screw 80A. 18 is projected to the back of the backrest 5. FIG. 30 shows a bed development at this time.

  Thus, there is no need to manually install an auxiliary leg for a bed when the backrest part 5 is tilted, and an office chair that can be easily and safely transformed from a chair to a bed is provided. it can.

  Further, since the auxiliary leg 18 is fixed by the auxiliary leg operating rod 81 in a state that is not perpendicular to the ground surface, the length can be adjusted by the installation portion. Therefore, it is stable with less backlash than a vertically lowered leg, and a comfortable feeling can be obtained.

  Next, a fifth embodiment of the present invention will be described. The present invention is characterized in that a removable keyboard base 120 is disposed at the tip of the armrest portion 9 of the chair body 1. FIG. 31 is a plan view around the armrest 9 of the chair body 1 at this time, FIG. 32 (a) is a right side view thereof, and FIG. 32 (b) is a left side view thereof.

  The keyboard base 120 includes a base body 125 and keyboard base arms 130 </ b> A and 130 </ b> B that join both end portions to the armrest portion 9.

  As shown in FIG. 32A, the keyboard base arm 130 </ b> A on the right side of the chair user includes a keyboard height adjustment rod 121 that can be inserted into the armrest 9 and a keyboard base support plate 126 that supports the base body 125. The height of the keyboard stand 120 can be freely determined.

  The keyboard height adjustment rod 121 includes an insertion part 121a into the armrest part 9, a hanging part 121b suspended from the tip of the insertion part 121a, and a protrusion 121c disposed at the lower end of the hanging part 121b. It is configured.

  A keyboard support plate 126 is in contact with the hanging part 121b. The keyboard base support plate 126 is L-shaped, and is a portion that is suspended from a plate portion 126 a that supports the base body 125 and the chair main body 1 side end, and is in contact with the keyboard height adjustment rod 121. The height adjustment unit 126b is configured.

  Around the projection 121c of the keyboard height adjusting rod 121, a cover 127 for inserting and holding the keyboard support plate 126 is disposed.

  A recess 126c into which the protrusion 121c of the keyboard height adjustment rod 121 can be fitted is formed on the surface of the keyboard base support plate 126 on the armrest 9 side of the height adjustment portion 126b.

  The hanging portion 121b of the keyboard height adjusting rod 121 and the height adjusting portion 126b of the keyboard base support plate 126 are screwed with a height holding screw 128 in a state where the protruding portion 121c and the recessed portion 126c are fitted.

  A screw hole 126d for the height holding screw 128 is formed on the surface of the height adjusting portion 126b of the keyboard support plate 126 opposite to the concave portion 126c. A base body support screw 129 passes through the plate portion 126a of the keyboard base support plate 126, and pivotally supports the keyboard base support plate 126 and the base body 125 in a rotatable manner.

  As shown in FIG. 32 (b), the keyboard base arm 130 </ b> B on the left side includes an extension part 131 housed in the left armrest part 9 and a fitting part disposed on the left end part of the base body 125. 132. At the tip of the extension part 131, a hanging part 131 a is provided with a fitting hole 139 for fitting with the fitting part 132.

  The fitting portion 132 includes a fitting plate height adjusting rod 133 attached to the base body 125, an L-shaped fitting plate 134 having one end inserted into the fitting plate height adjusting rod 133, and a fitting plate height adjusting rod. 133 and a fitting portion screw 135 for stopping the fitting plate 134.

  FIG. 33 (a) is an enlarged view of 134a, which is an end portion of the fitting plate 134 on the extension portion 131 side, and FIG. 33 (b) is a plan view thereof. FIG. 34 (a) is an enlarged view of the hanging part 131a of the extension part 131, and FIG. 34 (b) is a plan view thereof.

  As shown in FIG. 33, the fitting portion 134a of the fitting plate 134 has a fitting hole 137 between the upper and lower plates 134b and 134c, and a protruding member 138 is disposed in the fitting hole 137. Yes. The side surfaces 138 a and 138 b of the projecting member 138 are along an arc centered on the base body support screw 129.

  As shown in FIG. 34, flat holes 139b and 139c into which the upper plate 134b and the lower plate 134c of the fitting plate 134 are inserted and the protruding members 138 are inserted into the hanging part 131a of the extension part 131. A projecting member insertion hole 139a having a shape matched to the shape is disposed.

  FIG. 35A shows a cross-sectional view taken along the line KK in FIG. As shown in FIG. 35 (a), a screw hole corresponding to the height adjusting portion 126b of the keyboard support plate 126 disposed on the right side of the chair body 1 is formed on the side surface of the fitting plate height adjusting rod 133. 136 is opened.

  A protrusion 133a corresponding to the screw hole 136 protrudes inside the fitting plate height adjusting rod 133 so that the fitting plate 134 can be locked.

  FIG. 35 (b) is a cross-sectional view taken along line LL in FIG. 35 (a). The fitting plate 134 can be moved up and down after sliding back and forth in the fitting plate height adjusting rod 133 in order to change the locking position.

  At this time, the fitting plate 134 has a groove 134d for preventing the fitting plate height adjusting rod 133 from protruding and for guiding to the screw hole 136 position.

  FIG. 36 is a plan view of the periphery of the base body 125. A keyboard fixing member 140 can be installed on the base body 125. 37 is a cross-sectional view taken along line MM in FIG. 36, and FIG. 38 is a cross-sectional view taken along line NN in FIG.

  The base body 125 is provided with fixing member holes 123 at two positions on the left and right sides, so that the lower support portion 144 can be inserted from the back surface of the base body 125. Further, a screw groove 124 is engraved on the back surface of the base body 125 in parallel with the fixing member hole 123 so that the keyboard fixing member 140 can be screwed to the base body 125 with the fixing member screw 145. It has become.

  The keyboard fixing member 140 has an upper support portion 143 and a lower support portion 144 for fixing the keyboard. The upper and lower support portions 143 and 144 are L-shaped, and include 143a and 144a erected with respect to the base body 125, and 143b and 144b parallel to the base body.

  Cushion materials 142A and 142B made of an elastic material such as rubber are attached to the standing portions 143a and 144a so that a keyboard or the like can be held.

  The parallel portions 143b and 144b are disposed vertically with the fixing member spring mechanism 146 interposed therebetween. One surface of the lower support portion 144 side of the fixing member spring mechanism 146 is opened, and one hole 146b is provided on the lower surface, and the fixing member spring 147 is inserted into the spring chamber 146a. The tip is fixed to the wall surface 146c of the spring chamber 146a.

  The other end of the fixing member spring 147 is fixed to the spring support 149. A wall surface 149a of the spring support portion 149 is formed of a rectangular tube portion, and can be inserted into the spring chamber 146a together with the fixing member spring 147.

  The bottom portion 149b of the spring support portion 149 has a groove 149c on the side, and can engage with the spring chamber 146a. Further, the lower end thereof is fixed to the parallel part 143b of the upper support part 143.

  From the upper surface of the spring chamber 146a, the sliding member 148 is extended toward the left in FIG. The horizontal portion 144b of the lower support portion 144 is hollow, and the sliding member 148 is inserted into the horizontal portion 144b.

  The sliding member 148 and the horizontal portion 144b of the lower support portion 144 are respectively provided with screw holes, and are fixed by fixing member screws 145. There are three screw holes, for example, large, medium, and small, so as to match the size of the keyboard to be installed. The distance between the upper support portion 143 and the lower support portion 144 of the keyboard fixing member 140 is determined by the position of the screw hole.

  On both sides of the upper support portion 143, upper support portion guide plates 141 are attached. On the inner surface of the upper support portion guide plate 141, a plate-like protrusion portion 141a is provided so as to protrude vertically. The protrusion 141a is slidably fitted in a groove 146d formed on the outer side surface of the spring chamber 146a.

  The upper support portion guide plate 141 and the upper support portion 143 can slide horizontally along the groove 146d. Further, the space between the upper support portion 143 and the fixing member spring mechanism 146 is reinforced.

  Next, the operation of the fifth exemplary embodiment of the present invention will be described. When the keyboard base 120 is used, first, the keyboard height adjusting rod 121 of the keyboard base arm 130 </ b> A is inserted into the right armrest portion 9.

  Next, the holding screw 128 is loosened, and the keyboard base support plate 126 is adjusted to an arbitrary height. At this time, the protrusion 121c of the keyboard height adjusting rod 121 is fitted into the recess 126c of the keyboard base support plate 126 to guide the height determination. When the height is determined, the holding screw 128 is used.

  The keyboard base arm 130B on the left side adjusts the fitting portion 132 so that the height of the keyboard base arm 130A is equal to the height of the keyboard base arm 130A. The fitting part screw 135 is loosened, the fitting plate 134 is pulled out, moved to an appropriate screw hole 136, and stopped by the fitting part screw 135.

  The extension 131 is pulled out from the left armrest 9. Since the keyboard base 120 rotates about the base body support screw 129 as a support shaft, the fitting portion 134a of the fitting plate 134 draws a gentle arc and enters the fitting hole 139 of the hanging portion 131a of the extension portion 131. Inserted.

  When the user pushes the keyboard base 120 forward, the forward linear motion is converted into a circular motion centering on the base body support screw, and the keyboard base arm 130B has a fitting hole 139 in the extension 131. Accordingly, the projecting member 138 of the fitting plate 134 and the upper and lower plates 134b and 134c are separated in a circular arc.

  Therefore, even if the keyboard stand 120 remains installed, the user can easily get in and out of the chair. In addition, even if the user moves unexpectedly, the keyboard base 120 is detached without hindering the movement, so that an impact can be absorbed and an accident can be prevented.

  A keyboard 150 can be installed on the keyboard base 120. Since the fixing member hole 123 formed in the base body 125 has a width in the left-right direction in FIG. 36, the lower support portion 144 of the keyboard fixing member 140 can be inserted into a position according to the size of the keyboard to be installed. it can.

  The fixing member screw 145 to which the keyboard fixing member 140 and the base body 125 are attached can also be installed at an arbitrary position because the screw groove 124 is formed in the left-right direction in FIG. ing.

  By loosening the fixing member screw 145, the sliding member 148 can also slide from the horizontal portion 144b of the lower supporting portion 144, and the length between the upper supporting portion 143 and the lower supporting portion 144 of the keyboard fixing member 140 is increased. It is also possible to adjust.

  After roughly adjusting to the keyboard 150 to be used by the sliding member 148, the upper support portion 143 is also moved to the right in FIG. 37 by pushing the spring support portion 149 to the right in FIG. It moves and the space between the upper support part 143 and the lower support part 144 spreads. At this time, the fixing member spring 147 in the spring chamber 146a is in a contracted state.

  Therefore, by installing the keyboard 150 in a state where the space between the upper support portion 143 and the lower support portion 144 is widened, the upper support portion 143 and the lower support portion 144 are inwardly moved by the restoring force of the fixing member spring 147. The force works and the installed keyboard 150 can be firmly fixed. The situation at this time is shown in FIG.

  As described above, it is possible to provide an office chair in which a keyboard base that can use a keyboard or the like in a free posture can be easily and safely attached in a chair state or a bed state.

  In addition, the keyboard fixing member 140 can support various sizes of keyboards, and each user's keyboard can be used.

  Further, when the keyboard 150 is not used, the keyboard base 120 can be used as a table or the like by removing the keyboard 150 and the keyboard fixing member 140.

  When the keyboard 150 is used, the elbow pad cushion 151 as shown in FIG. 40 is provided and applied to the position of the chest of the user so that the user can operate the keyboard without getting tired of the elbow and the like. be able to.

  Further, a mouse stand or the like may be installed when operating the personal computer.

  Next, a sixth embodiment of the present invention will be described. According to the present invention, an arm-type support base 155 for installing a monitor such as a television can be attached to the chair main body 1, and the arm-type support base 155 can be stored in the chair main body 1 when not needed. Further, the present invention is characterized in that installation and storage are possible even in a bed state and a small back space.

  The detailed configuration of each part is the same as that of the first embodiment to the fifth embodiment, and the same elements are denoted by the same reference numerals and the description thereof is omitted.

  FIG. 41 is an overall schematic diagram of the present invention. The arm-type support base 155 can be extended to the side part of the backrest part 5. FIG. 42 is a view of the chair body 1 as viewed from the direction of the arrow O when the arm type support base 155 is used.

  The arm 157 of the arm-type support base 155 is 157A, 157B, 157C from the chair body 1 side, and each part is rotatably connected by the joint parts 158A, 158B, and is folded and stored on the back surface of the backrest part 5. It can be done.

  An arm holding plate 162 projects from the backrest portion 5, and the arm 157 is brought into contact with the backrest portion 5 by the arm holding plate 162 and is slidable. Therefore, it is not necessary to tighten the support base fixing screw 153 when the arm 157 is stored, and it can be easily pulled out during use.

  FIG. 43 (a) shows a state when the arm type support base 155 is housed in the cross section taken along the line PP in FIG. Note that FIG. 43B is a cross-sectional view taken along the line Q-Q in FIG. In FIG. 43A, an arm slide groove 159 is formed on the back surface of the backrest 5 in the left-right direction in the figure.

  One end of the arm 157A is joined to the arm 157B by a joint 158A, and a support base fixing screw 153 passes through the other end. As shown in FIG. 43B, the support base fixing screw 153 has a hollow shape, and an arm slide fitting portion 156 is attached therein.

  The arm slide fitting portion 156 is inserted into the arm slide groove 159 so that the slide portion 156a is slidable. The tip of the rod-like portion 156b projecting from the sliding portion 156a is provided with a screw thread in the opposite direction, and is stopped by a screw hole 153a formed in the support base fixing screw 153.

  The sliding portion 156a of the arm sliding fitting portion 156 that has slid is stopped at the side end portion of the backrest portion 5 of the arm sliding groove 159, and the rod-shaped portion 156b is rotated around the stopping portion. A rotating part 159a that can be provided is provided.

  In the rotating portion 159a, the arm slide fitting portion 156 moved from the back surface to the side surface of the backrest portion 5 is fixed by a support base fixing screw 153, and is supported on the side surface portion of the rotating portion 159a. A screw hole 159b for stopping the base fixing screw 153 is formed.

  An installation table 154 is disposed at the tip of the arm 157C. The arm 157C and the installation base 154 can be rotated 360 degrees by a spherical joint 158C, and can be set at various angles. Note that the number of arms 157 is not limited to three, and the number can be increased or decreased depending on the structure and situation.

  Next, the operation of the sixth embodiment of the present invention will be described. FIG. 44 shows a procedure for setting the arm type support base 155.

  As shown in FIG. 44 (a), the arm-type support base 155 accommodated has an arm slide fitting portion 156 that slides in the arm slide groove 159 of the backrest portion 5, as indicated by an arrow in the figure. Furthermore, it can be pulled out laterally with respect to the chair body 1.

  As shown in FIG. 44 (b), the arm slide fitting portion 156, which is stopped from sliding at the rotating portion 159 a at the end of the arm slide groove 159, extends from the back surface of the backrest portion 5 to the side surface side. The direction can be changed by turning as shown by the arrows in the figure.

  When the support base fixing screw 153 is stopped in the screw hole 159b of the arm slide groove 159 on the side surface of the backrest portion 5, the rod-shaped portion 156b of the arm slide fitting portion 156 is reversed inside the support base fixing screw 153. The cut screw thread is inserted into the screw hole 153a of the support base fixing screw 153.

  Accordingly, the span between the arm slide fitting portion 156 and the support base fixing screw 153 can be shortened. Therefore, even if the support base fixing screw 153 is tightened and inserted into the screw hole 159b, the arm slide The position of the fitting part 156 does not move.

  As described above, the arm-type support base 155 is pulled out from the back of the stored backrest 5 in the lateral direction, so that it can be installed even when the back space is narrow in a bed state, and it can be easily armed at any time. A type support 155 can be used.

  In addition, since the plurality of arms are rotatably connected, the installation table 154 can be set at any position of the user, and installed on the installation table 154 in a comfortable posture according to each user. It becomes possible to see a monitor or the like.

  Further, FIG. 45 shows a simplified diagram of various devices connectable to the chair body 1. FIG. 45A is an enlarged view of the periphery of the pillow part 55. By incorporating a speaker 171 in the pillow part 55, various sound sources can be enjoyed.

  As a sound source, a music player 173, a fixed phone, a mobile phone 174, or the like can be connected in addition to the television monitor 172 that can be installed on the arm-type support base 155.

  In addition, these various sound sources can be enjoyed by individuals without leaking sounds by using the earphones 175.

  FIG. 45B is an example of a small monitor that can be installed on the arm-type support base 155. A general small television or the like can be installed on the arm-type support base 155, but a dedicated monitor 172 may be provided.

  The dedicated monitor 172 can be widely used as a communication tool, not limited to the reception of television and office computer operation. Since telephone lines can be used for various telephones 174, Internet and videophone calls can also be enjoyed.

  Therefore, a camera 177 and a microphone 178 can be installed on the dedicated monitor 172 in addition to the television speaker 176. Further, the sub display 179 may be configured to display a videophone call or the like.

  Note that the installation table 154 is not limited to the installation of the monitor 172, and can be used as a reading table by locking a book for reading. It is also possible to install a mobile phone 174 and enjoy a freehand conversation.

  Thus, the user can enjoy watching TV and enjoying various communications in a relaxed state, and can obtain a comfortable rest time. Furthermore, by using the keyboard stand 120 and the mouse stand 170 described above, office work in a relaxed state and various personal computer operations can be easily performed.

  Next, a seventh embodiment of the present invention will be described. FIG. 46 is a simplified side view of the present embodiment. The detailed configuration of each part is the same as that of the first embodiment to the sixth embodiment, and the same elements are denoted by the same reference numerals and the description thereof is omitted (hereinafter the same in each embodiment).

  In the present invention, when the chair is used, as shown in FIG. 46 (a), the cushions 180A and 180B in which the seat portion 3 and the backrest portion 5 are integrated are formed in two layers.

  At the time of deformation from the chair to the bed, as shown in FIG. 46 (b), after the backrest is once tilted backward and brought into a horizontal state, it can be rotated around the connecting portion 181 to be developed. FIG.46 (c) shows the time of bed use.

  Next, an eighth embodiment of the present invention will be described. FIG. 47 is a simplified side view of the present embodiment, and FIG. 47 (a) shows the chair in use.

  As in the seventh embodiment, the present invention has a structure in which two cushions 180A and 180B are overlapped. However, as shown in FIG. The upper cushion 180B slides as shown by the arrow on the lower cushion 180A as shown in FIG. FIG. 47 (c) shows the use of the bed.

  Next, a ninth embodiment of the present invention will be described. FIG. 48 is a simplified side view of the present invention. The present invention is characterized in that the seat portion auxiliary extension portion 3B is disposed on the bottom portion 3A of the seat portion 3, and the backrest auxiliary extension portion 5C is disposed on the front surface of the base portion 5A of the backrest portion 5.

  FIG. 48 (a) is when the chair is used, and when the bed is unfolded, as shown in FIG. 48 (b), after the backrest part 5 is tilted to the horizontal, the foot part is the seat auxiliary extension part 3B and the head part is the backrest. Each of the auxiliary extension portions 5C is developed around the connection portion. FIG. 48C shows the use of the bed.

  Next, a tenth embodiment of the present invention will be described. FIG. 49 shows a simplified side view of the present invention. In the ninth embodiment, the present invention is characterized in that the backrest auxiliary extension 5D is disposed on the back surface of the backrest base 5A. FIG. 49A shows the use of the chair, and FIG. 49B shows the use of the bed.

  According to the seventh to tenth embodiments, a method for deploying the chair in various variations is possible, and an appropriate chair is provided that is compatible with the structure of the chair body 1 and the needs of the user. It becomes possible.

  Next, an eleventh embodiment of the present invention will be described. The present embodiment is characterized in that a mouse operation table 152 for operating a mouse or the like can be installed on the chair body 1 when operating a personal computer when the chair is used.

  FIG. 50 shows a diagram in which the mouse operation table 152 is disposed on the seat 3. The mouse operation table 152 can be attached to the bottom surface of the seat portion 3 and stored in the lower portion of the seat portion 3, and is pulled out and used as necessary.

  As shown in FIG. 50 (a), a mouse platform rod 161 is pivotally supported at both end portions of the mouse platform 170 by a mouse platform screw 160A. The other end of the mouse platform rod 161 is pivotally supported by a mouse platform screw 160B slidably locked in a mouse platform slide groove 163 carved on both sides of the mouse platform mounting plate 162. Has been.

  51A is a cross-sectional view taken along the line RR in FIG. 50A, and FIG. 51B is a cross-sectional view taken along the line S-S in FIG. A fitting portion 170a as shown in FIG. 51A protrudes from the contact surface of the mouse base 170 with the mouse base mounting plate 162.

  The fitting portion 170a is fitted into a mounting plate fitting groove 169 carved in the bottom of the mouse base mounting plate 162 so that the mouse base 170 and the mouse base mounting plate 162 are brought into contact with each other at the time of storage. It has become. When the mouse table 170 is erected, the mouse table 170 is held by being fitted into the fitting groove 164a of the mouse table fitting plate 164 as shown in FIG. 51 (b).

  An operation table rod 166 is rotatably supported by an operation table screw 165A at the other end of the mouse table 170 that is not supported by the mouse table screw 160A. The other end of the operation table rod 166 is pivotally supported by an operation table screw 165B at the lower end of the operation table 167 attached to the mouse table 170 in the figure.

  The operation table screw 165 is provided with a stopper, and the rotation range is from the state when the operation table 167 is stored to the installation position on the mouse table 170.

  An operation table groove 168 is formed on both sides of the operation table 167 where the operation table screw 165B is disposed, so that the operation table screw 165B can slide.

  53 is a cross-sectional view of the operation table 167 and the mouse table 170 when the operation table 167 is installed. A fitting groove 167 a is formed on the surface of the operation table 167 that is in contact with the mouse table 170, so that the operation table 167 can be fitted to the operation table fitting portion 170 b provided on the mouse table 170. .

  In this configuration, when the mouse operation table 152 is installed, the mouse table screw 160B slides in the mouse table slide groove 163 in the direction of the arrow as shown in FIG. It can be pulled out.

  After the mouse base screw 160B slides to the end of the mouse base slide groove 163, the mouse base screw 160B rotates as indicated by the arrow in FIG. .

  As shown in FIG. 50D, when the mouse table 170 in the vertical state is pulled down, the mouse table screw 160B returns to the left in the mouse table slide groove 163, and the mouse table 170 is fitted to the mouse table. The plywood 164 is fitted and fixed.

  After the mouse table 170 is placed upright, the operation table 167 can be installed. The situation at this time is shown in FIG. From the state of FIG. 52A in which the mouse base 170 is erected, the operation base 167 is rotated as indicated by the arrow in FIG. 52B with the operation base screw 165A as a support shaft.

  When the operation table 167 is slid to the right in the drawing so that the operation table 167 is inserted into the operation table fitting portion 170b of the mouse table 170 at a position where the rotation of each operation table screw 165 stops, FIG. As shown in FIG. 53, the operation table screw 165B slides in the operation table groove 168, and the operation table 167 is fitted to the mouse table 170.

  As described above, it is possible to provide the mouse operation table 152 that can be installed and stored with a simple operation. Further, by pulling out in the lateral direction with respect to the chair body 1, it is possible to install even if the bed is in a state and there is no space in the lower portion of the seat portion 3.

  Therefore, the user can operate the mouse regardless of the posture, and can easily enjoy the Internet and the like in addition to the paperwork using the personal computer.

  Next, a twelfth embodiment of the present invention will be described. FIG. 54 is an overall side view of the present embodiment. As for the auxiliary leg for using the bed on the head side, the same mechanism as that of the fourth embodiment is used (hereinafter the same applies to each embodiment), and this is indicated by a broken line in FIG.

  The chair body 301 includes a seat portion 303 and a backrest portion 305. The seat portion 303 can be freely set by the leg portion 7. The seat portion 303 and the backrest portion 305 are connected by an angle adjuster 307.

  In the angle adjuster 307, a member 307A attached to the seat portion 303 and a member 307B attached to the backrest portion 305 are pivotally supported by a screw 307C, and reclining to a free angle by loosening the screw 307C. It is possible.

  The interior of the seat portion 303 and the backrest portion 305 is hollow, and the drawer portion 310 is slidably inserted. A lid 311 is disposed in the opening 302 of the seat 303 and is opened and closed by the movement of the drawer 310.

  The drawer part 310 has a structure in which a drawer front part 310A housed in the seat part 303 and a drawer rear part 310B housed in the backrest part 305 are connected by a bendable part 310C.

  FIG. 55 is an overall perspective view of the drawer portion 310 in the horizontal state. The drawer portion 310 is provided with a cover 314 for covering the bendable portion 310C when being pulled out.

  FIG. 56 is an enlarged view of the bed leg portion 330. As shown in FIG. 55, the bed leg portion 330 is pivotally supported by a leg set screw 338 on the side portion of the drawer portion 310, and the drawer leg portion 330 is pulled out. It slides in conjunction with the portion 310.

  57 is a cross-sectional view taken along the line TT in FIG. 54, and FIG. 58 is a cross-sectional view taken along the line U-U in FIG. As shown in FIG. 55, a groove 312 having a T-shaped cross section is formed on the side surface of the drawer front portion 310A and the drawer rear portion 310B, and the T-shape projecting into the seat portion 303 and the backrest portion 305 is provided. The projections 320A and 320B are fitted.

  The bed leg portion 330 interlocked with the drawer portion 310 slides on the upper surfaces of the T-shaped protrusions 320A and 320B. Inside the seat portion 303 and the backrest portion 305, leg pressing plates 321A and 321B are projected in parallel with the T-shaped projections 320A and 320B. The T-shaped projections 320A and 320B and the leg pressing plate are provided. A bed leg 330 is provided in the space formed by 321A and 321B.

  The bed leg portion 330 is prevented from rotating about the leg set screw 338 by being supported by the leg pressing plates 321A and 321B.

  In FIG. 55, the cover 314 is slidable forward and backward with respect to the drawer front part 310A, and can move from the front part of the drawer front part 310A to the upper part of the bendable part 310C.

  A cover projection 313 is provided on the side bendable portion side of the drawer front portion 310A. The cover projection 313 is slidable in a cut 315 provided on the side surface of the cover 314. On the side backrest side of the cover 314, a drawer bar projection 319 is disposed.

  The drawer part 310 and the seat part 303 can be slidably drawn out via a drawer part bar 316 shown in FIG. FIG. 59 (a) is a side view of the drawer portion bar 316 on the drawer portion 310 side, from the front end when the drawer portion 310 is stored to the position of the drawer portion bar projection 319 when stored. A groove 317 is engraved.

  The drawer bar projection 319 is fitted in the cover sliding groove 317 so as to be slidable.

  FIG. 59B is a side view on the side of the seat 303, which is the opposite side of the plane shown in FIG. On the side surface of the seat portion 303, two seat portion sliding grooves 308 are formed on the upper and lower sides. A hooking protrusion 304 projecting inwardly is fitted on the inner side surface of the seat portion 303 inside the seat portion sliding groove 308 so as to be slidable. FIG. 59C is a cross-sectional view of the drawer bar 316 at this time, and shows a state where the drawer bar 316 is engaged with the engagement protrusion 304 of the seat 303.

  The drawer bar 316 is not fixed to the chair body 301 and can slide back and forth. When the drawer 310 is housed in the seat 303, the drawer 310 is locked by the drawer bar projection 319 and the fitting projection 304 of the seat 303.

  When the drawer 310 protrudes from the seat 303, the drawer bar projection 319 slides in the cover sliding groove 317 in the protruding direction, and engages at the front closed end 317a of the cover sliding groove 317. It is supposed to be.

  The pull-out bar 316 is engaged with the pull-out bar protrusion 319, and the hook protrusion 304 of the seat 303 is then hooked with the rear end 308 b of the seat slide groove 308 on the backrest 305 side. Up to this point, it projects from the seat 303 in conjunction with the drawer 310.

  FIG. 60 shows a partially enlarged view of the bendable part 310C. The bendable portion 310C has a rectangular parallelepiped member 322 connected by a hinge 323, and can be bent only in one direction indicated by an arrow in FIG.

  As shown in FIG. 54, when using a normal chair, the drawer 310 is housed inside the chair body 301 with the bendable portion 310C bent. FIG. 61 shows a state where the reclining of the chair body 301 is tilted horizontally.

  At this time, the drawer 310 is also horizontal and can be pulled out from the chair body 301 and used as an extension when using the bed. FIG. 62 shows a state when the drawer 310 is further pulled out.

  55 and 56, the bed leg 330 attached to the drawer 310 has the same structure as the drawer 310, and includes a leg body front 330A, a leg body rear 330B, and a bendable part 330C. A leg cover 334 that covers the periphery of the bendable part 330C at the time of pulling out, and a leg pulling bar 336 having one end locked in the seat part 303 are configured. Further, a caster 331 is disposed at the tip thereof.

  As shown in FIG. 57, a rack 340 is formed on the bottom of the drawer 310. A pinion 341 is disposed on the bottom of the chair body 301 with respect to the rack 340. Therefore, a notch 339 for fitting the pinion 341 to the rack 340 is notched on the bottom plate 303 a of the chair body 301.

  The pinion 341 is interlocked with a gear 342 disposed on the side of the chair body 301 by a gear shaft 351 that crosses the bottom of the chair body 301.

  As shown in FIG. 61, a gear train 343 and an armrest portion 344 with a rack are disposed on the side of the chair body 301 and covered with a gear train cover 347. The rack-equipped armrest portion 344 includes an armrest 344A on which the user puts his elbow, a rack 344B, and a column 344C.

  The armrest portion 344 with a rack is slidable back and forth, and the rack 344B rotates the gear train 343 by its movement. The inside of the column 344C is hollow, and a sliding lock mechanism 346 is provided.

  FIG. 63 is a cross-sectional view taken along the line VV in FIG. 54 and shows the sliding lock mechanism 346. 64 is a cross-sectional view taken along the line HH in FIG. The sliding lock mechanism 346 includes an operation lever 361, a spring 362, a link mechanism 363, and a fitting material 364.

  The operation lever 361 has a structure in which an operation portion 361A that protrudes from the support column 344C of the armrest portion 344 with a rack and an operation plate 361B that operates on the link mechanism 363 in the sliding lock mechanism 346 are connected by a connection portion 361C. Yes.

  Link mechanisms 363 are disposed at the left and right ends of the operation plate 361B of the operation lever 361 so as to transmit the movement of the operation lever 361 to the fitting material 364.

  One end of the spring 362 is fixed to the inner wall of the support column 344C of the armrest portion 344 with rack, and the other end is fixed to the center line of the operation plate 361B of the operation lever 361.

  Further, a fitting material hole 366 for fitting the fitting material 364 is provided at a fixed position of the armrest portion 344 with a rack when the chair is used.

  Furthermore, an opening fitting material hole 369 is provided at the position of the armrest portion with rack 344 when the bed is used in a state where the drawer portion 310 is completely pulled out, and the armrest portion with rack that has moved has been moved. A fitting material 364 protruding from 344 can be fitted.

  FIG. 65 is a configuration diagram around the gear train 343. The gear train 343 is supported on the gear 352A meshing with the rack 344B of the armrest 344 with rack, the gear 352B supported on the common shaft with the gear 352A, the gear 354A meshing with the gear 352B, and supported on the common shaft with the gear 354A. The gear 354B is configured to mesh with the gear 342.

  66 is a sectional view taken along the line WW in FIG. 57, and FIG. 67 is a sectional view taken along the line XX in FIG. A ratchet mechanism 370 is disposed on both inner side surfaces of the seat portion 303. A partially enlarged view of the ratchet mechanism 370 is shown in FIG. In the ratchet mechanism 370, a ratchet wheel 374 is pivotally supported by a ratchet screw 375 with respect to the base 372.

  The ratchet wheel 374 has a fitting portion 374a cut out. The fitting portion 374a is configured such that a protruding portion 332 projecting from the bed leg portion 330 is fitted therein, and the fitting opening is wide open in a fan shape toward the outside so as to be easily fitted.

  A ratchet wheel spring 373 is disposed around the ratchet screw 375. The ratchet wheel spring 373 is a spiral spring and biases the ratchet wheel 374 to its original position. Thereby, the fitting part 374a of the ratchet wheel 374 can always wait reliably in the position where the projection part 332 of the bed leg part 330 fits.

  Further, a click 376 is pivotally supported on the base 372 by a click screw 377 so as to mesh with the ratchet wheel 374. The click 376 is provided with a click spring 379 that urges the click 376 downward in the figure.

  In the state where the click 376 is engaged with the ratchet wheel 374, the ratchet wheel 374 cannot rotate in the direction in which the drawer 310 and the bed leg 330 are stored. Can be prevented from moving due to a load such as the weight of the user.

  A position guide protrusion 378 protrudes from the side surface of the click 376 opposite to the surface in contact with the base 372, and this position guide protrusion 378 is formed on the abutment 384 provided in the seat portion 303. It is in contact with the upper surface and is slidable. In FIG. 66, since the abutment 384 is on the front side of the sheet, it is indicated by a broken line.

  Since the position guide protrusion 378 is supported by the abutment 384, the click 376 can adjust the height of the tip portion that meshes with the ratchet wheel 374 against the bias of the click spring 379. ing.

  The ratchet screw 375 and the click screw 377 penetrate the base 372 and project to the opposite surface, and are fitted into the ratchet guide groove 380 and the click guide groove 382 engraved on the inner wall surface of the seat portion 303. ing.

  The fitted ratchet screw 375 and click screw 377 are slidable inside the ratchet guide groove 380 and click guide groove 382, respectively.

  When the projection 332 of the bed leg 330 is fitted into the ratchet wheel 374 and is urged to the left in the drawing along with the movement of the drawer 310, the ratchet mechanism 370 has the ratchet guide groove 380 and the click guide groove 382. The seat portion 303 is moved to the end portion on the opening 302 side.

  The abutment 384 with which the position guide protrusion 378 of the click 376 contacts is curved downward as shown by the broken line in FIG. 66, and the contact surface thereof is lowered. When 378 moves to the tip, the position of the position guide projection 378 is lowered along the curve due to the urging of the click spring 379.

  As the position guide protrusion 378 is lowered, the tip of the click 376 is also lowered and meshed with the ratchet wheel 374.

  The T-shaped protrusion 320A protruding from the inner lateral wall surface of the seat portion 303 is provided at the end portion of the ratchet mechanism 370 on the side of the backrest portion 305 in order to dispose the ratchet mechanism 370 on the inner wall surface of the seat portion 303. It has ended.

  When the T-shaped protrusion 320A ends, the bed leg 330 is no longer supported, and therefore, the T-shaped protrusion 320A is disposed on the inner bottom surface of the seat 303 from the end of the T-shaped protrusion 320A toward the opening 302. A provided bed leg support 386 is provided.

  In FIG. 66, the bed leg support 386 is indicated by a broken line because it is on the front side of the sheet. The support surface of the bed leg support base 386 is on the extension of the support surface of the T-shaped protrusion 320A, and the tip portion is gently curved. The bed leg portion 330 fitted to the ratchet mechanism 370 hangs downward by its own weight according to the shape of the tip portion.

  Therefore, the bed leg portion 330 that can be rotated about the leg screw 338 is restricted by the upper surface of the bed leg portion 330 being pressed by the leg pressing plates 321A and 321B. After mating with the ratchet mechanism 370, it must be able to rotate to hang down and ground.

  Therefore, the leg pressing plate 321 </ b> A ends at a position where the bed leg 330 is fitted with the ratchet mechanism 370.

  A ratchet spring 385 is also provided for the ratchet mechanism 370 and urges it to the right in the drawing. When the drawer 310 and the bed leg 330 are pulled back by the rotation of the pinion 341, the ratchet mechanism 370 is returned to its original position by the bias of the ratchet spring 385 and the ratchet wheel spring 373. Yes.

  As shown in FIG. 66, on the upper backrest portion 305 side of the seat portion 303, a transfer plate accommodation hole 387A is formed, and a transfer plate 388A is disposed therein. One end of the transfer plate 388A is engaged with the transfer plate spring 389A, and the other end is pivotally supported by a transfer plate 388B housed in the backrest 305.

  The other end of the transfer plate spring 389A that is not locked to the transfer plate 388A is locked to the wall surface of the transfer plate accommodation hole 387A. FIG. 69 is a cross section of the backrest portion 305, and the transfer plate accommodation hole 387B, the transfer plate 388B, and the transfer plate spring 389B on the backrest portion 305 side have the same structure as the seat portion 303 side.

  70 is a cross-sectional view taken along line YY in FIG. 61, and FIG. 71 is a view taken along arrow Z in FIG. The lifting mechanism of the leg 7 is assumed to be, for example, a gas spring 394.

  The gas spring 394 is provided in the grounded outer cylinder 421, and an up / down button 392 projects from an upper end portion of the gas spring 394. A press plate 390 is in contact with the lift button 392, and a lift lever (not shown) is connected to the press plate 390.

  The pressure plate 390 is pushed down by a lift lever (not shown), and the lift button 392 is pushed into the gas spring 394, so that the gas spring 394 moves up and down with respect to the outer cylinder 421.

  As the gas spring 394 rises and protrudes upward from the outer cylinder 421, the height of the chair body 301 also rises, and when the gas spring 394 descends and is stored in the outer cylinder 421, the chair body 301. The height of is also going down.

  A hollow auxiliary disk 396 is provided around the upper surface of the gas spring 394. In a space formed between the auxiliary disk 396 and the pressing plate 390, an elevating button lock plate 398 is inserted. The lift button lock plate 398 is interlocked with the L-shaped switch plate 402 by a pantograph-shaped link device 400.

  The L-shaped switch plate 402 includes a side 402 a along the bottom surface of the seat portion 303 and a side 402 b erected on the side surface of the seat portion 303.

  The up / down button lock plate 398 is pivotally supported by one vertex of a diamond-shaped link bar 403 and a link screw 401A. One side 402a of the L-shaped switch plate 402 is pivotally supported by the link screw 401C at the opposite vertex of the link screw 401A.

  The link screws 401A and 401C are slidable in the link screw grooves 404A and 404C, which are engraved in the horizontal direction in the figure at the bottom of the seat portion 303.

  Link screws 401B and 401D are pivotally supported at other vertices in the link bar 403, and can slide in the link screw grooves 404B and 404D that are engraved in the vertical direction in the drawing at the bottom of the seat portion 303. ing.

  63 and 70, an L-shaped switch plate interlock 367 is disposed inside a fitting material hole 366a formed on the side surface of the seat portion 303 of the armrest portion 344 with a rack. A hole 368 is formed in the bottom surface.

  The plate 367A of the L-shaped switch plate interlock 367 is fixed to one end of a spring 367B, and the other end of the spring 367B is fixed to the wall surface of the fitting material hole 366a. The plate 367A is in contact with the fitting material 364, and the lower part thereof is connected to the L-shaped switch plate 402b through the hole 368.

  FIG. 72 is a simplified side view of the periphery of the seat portion 303 showing the gear locking mechanism 410. In the gear lock mechanism 410, a gear stopper 412 that fits into a notch 353 formed in the gear 352A is provided upright at the tip of the gear lock plate 416. The gear lock plate 416 is geared by a gear lock fulcrum screw 414. The column cover 347 is rotatably supported on the inner wall surface.

  A push-up plate 418 is in contact with the rear end portion of the gear lock plate 416. In the center of the push-up plate 418, a hole 418a for penetrating the leg portion 7 is formed. The push-up plate 418 is suspended from the seat portion 303 by a suspension spring 420 and is held by a push-up plate suspension member 419.

  A gear lock release plate 423 that is a hollow disk is provided around the upper end portion of the outer cylinder 421 of the leg portion 7, and the gear lock release plate 423 can come into contact with the push-up plate 418.

  Next, the operation of the twelfth embodiment of the present invention will be described. By loosening the screw 307C of the angle adjuster 307, the backrest 305 can be reclined to an arbitrary angle, and as shown in FIG. 61, it can be tilted to a horizontal state.

  FIG. 73 is an enlarged simplified view around the transfer plates 388 </ b> A and 388 </ b> B at the connection portion between the seat portion 303 and the backrest portion 305 at this time. As shown in FIGS. 61 and 73, a gap 450 is formed between the seat back 303 and the backrest 305 as it falls. At this time, the transfer plates 388A and 388B disposed in the seat portion 303 and the backrest portion 305 are pulled out from the inside of the transfer plate accommodation holes 387A and 387B depending on the reclining angle, and the gaps can be closed.

  As shown in FIGS. 66 and 69, the T-shaped protrusions 320A and 320B provided in the seat portion 303 and the backrest portion 305 are fitted in the grooves 312 formed in the drawer portion 310 shown in FIG. By doing so, the position of the drawer 310 is maintained and it serves as a guide during movement. Of the drawer part 310, the bendable part 310C does not have the groove 312 because the lateral width is narrower than the drawer front part 310A and the drawer rear part 310B.

  By pushing the armrest portion 344 with a rack forward, the gear train 343 rotates, and the drawer portion 310 can be protruded from the chair body 301. The situation at this time will be described below.

  As shown in FIG. 65, the rack 344B of the armrest portion 344 with a rack rotates the gear 352A. At this time, the gear 352B that is coaxial with the gear 352A and has a large number of teeth also rotates at the same rotation number, and the gear 354A that has a small number of teeth rotates more than the gear 352A. At this time, the gear 354B that is coaxial with the gear 354A and has a large number of teeth rotates the gear 342 having a small number of teeth more than the gear 354A.

  The gear 342 is coaxial with the pinion 341, and the rotation speed thus amplified enables the drawer 310 to move significantly even with a small movement distance of the rack 344 </ b> B.

  In order to return the armrest portion 344 with a rack to a fixed position and to prevent unintentional movement of the user, a fitting material 364 is disposed on the armrest portion 344 with a rack.

  63, the operating lever 361 is inserted into the column 344C by grasping the operating lever 361 protruding from the column 344C of the armrest 344 with rack, and as shown in FIG. 74, the fitting material 364 is inserted. Is pulled out from the fitting material hole 366 to release the lock.

  When the operation lever 361 is inserted into the support column 344C, the operation plate 361B of the operation lever 361 pushes the operation plate contact portion 363a of the link mechanism 363 in the insertion direction.

  At this time, the link mechanism 363 is interlocked with the movement of the operation plate abutting portion 363a, and the fitting material connecting portion 363b connected to the fitting material 364 pulls the fitting material 364 into the column 344C.

  When the fitting material 364 is disengaged from the fitting material hole 366, the lock is released, and the armrest portion 344 with rack can be moved.

  Next, the movement of the drawer 310 will be described with reference to FIGS. 55, 59, and 75. FIG. FIG. 75A shows a state in which the drawer 310 is completely stored. First, as shown in FIG. 75B, the front portion 310 </ b> A of the drawer portion 310 is projected by the pinion 341. At this time, the cover 314 is positioned at the opening of the seat 303, but only the drawer 310 moves.

  Along with the movement of the drawer front portion 310A, the cover protrusion 313 protruding from the drawer front portion 310A slides in the cut 315 provided in the cover 314 to the closed end 315a.

  As shown in FIG. 75 (c), after the cover projection 313 moves to the closed end 315 a of the cut 315, the cover 314 can also be interlocked and pulled out from the seat 303. At this time, the lead-out bar protrusion 319 of the cover 314 slides in the cover slide groove 317 that is open to the side of the lead-out part bar 316 that is not yet interlocked.

  As shown in FIG. 75 (d), when the drawer bar projection 319 moves to the front closed end 317a of the cover sliding groove 317, the drawer bar 316 engages with the drawer bar projection 319 and interlocks. Then protrude.

  As shown in FIGS. 59 (b), 59 (c), and 57, in the protrusion 319 for the drawer portion bar, the seat portion sliding groove 308 engraved on the opposite surface of the cover sliding groove 317. In this case, a hooking protrusion 304 protruding inwardly is fitted into the opening 302 of the seat portion 303.

  The drawer bar 316 slides with the engaging protrusion 304 in a state in which the seat sliding groove 308 is fitted, and the engaging protrusion 304 is formed at the rear end 308 b of the seat sliding groove 308. , The protrusion of the drawer bar 316 is stopped.

  The lid 311 covers the step caused by the boundary between the seat portion 303 and the drawer portion 310 that occurs at this time. When the lid 311 is opened by the protrusion of the drawer 310, the upper surface of the lid 311 is the highest on the side of the seat 303, which is the connecting portion. As it goes forward, the thickness of the lid 311 decreases, and the stepped step formed between the seat portion 303 and the drawer portion 310 is compensated by a gentle slope.

  Next, the bed leg 330 will be described. When the drawer portion 310 is pulled out, the bed leg portion 330 pivotally supported by the leg fixing screw 338 on the side portion thereof is also projected in conjunction with it. As shown in FIG. 57, the bed leg 330 slides between the T-shaped protrusions 320 </ b> A and 320 </ b> B and the leg pressing plate 321.

  As shown in FIG. 66, the ratchet mechanism 370 opens the fitting portion 374a of the ratchet wheel 374 on the right side in the figure, on the backrest portion 305 side, and inserts the protruding portion 332 of the bed leg portion 330 that has moved. Let

  FIG. 76 shows a state in which the bed leg 330 is engaged with the ratchet mechanism 370 and is installed as a leg for bed use.

  As shown in FIG. 76A, the protrusion 332 of the bed leg 330 that has slid along the T-shaped protrusion 320A and the bed leg support 386 is a ratchet as shown in FIG. It fits into the fitting part 374a of the mechanism 370.

  The ratchet mechanism 370 fitted with the bed leg 330 slides along the ratchet guide groove 380 and the click guide groove 382 in conjunction with the drawer 310. At this time, the position guide protrusion 378 of the click 376 slides on the upper surface of the abutment 384.

  As shown in FIG. 76 (c), since the leg pressing plate 321 has been terminated halfway, the bed leg 330 is subjected to a downward force by its own weight from that point, and the bed leg support base. It hangs along a curve of 386.

  The click 376 of the ratchet mechanism 370 does not mesh with the ratchet wheel 374 because the position guide protrusion 378 is supported by the abutment 384. Therefore, the ratchet wheel 374 rotates in conjunction with the hanging of the fitted bed leg 330.

  When the suspended bed leg 330 contacts the ground, the rotation of the ratchet wheel 374 stops. Since the bed leg 330 can be moved by the caster 331 at the tip even after the contact with the ground, both move forward until the movement of the drawer 310 stops.

  When the ratchet screw 375 and the click screw 377 slide to the front ends of the ratchet guide groove 380 and the click guide groove 382, the sliding of the ratchet mechanism 370 stops, and the movement of the drawer 310 and the bed leg 330 The timing of stopping is simultaneous.

  Further, as shown in FIG. 76 (d), the shape of the abutment 384 also moves from the flat portion to the curved portion at this time, and the position guide protrusion 378 that has been supported moves downward along with the curved shape. The ratchet mechanism 370 stops moving and meshes with the ratchet wheel 374 to stop the rotation of the ratchet wheel 374.

  As shown in FIG. 70, the fitting member 364 works in conjunction with the L-shaped switch plate 402 and also acts on the height adjustment lock. For safety, it is necessary to prevent the chair body 301 from being changed in height when the bed is used. Therefore, the height can be adjusted only when the fitting material 364 of the armrest portion 344 with rack is fitted into the fitting material hole 366 when the chair as shown in FIGS. 70 and 71 is used.

  FIG. 77 shows a state in which the operation lever 361 of the armrest portion 344 with rack is pushed, and the fitting material 364 is stored in the support column 344C. At this time, the spring 367B of the L-shaped switch plate interlock 367 pressed by the fitting member 364 extends, and accordingly, the L-shaped switch plate 402 is pulled from the seat portion 303 toward the armrest portion 344 with rack. It will be in the state.

  FIG. 78 (a) is a bottom view of the state at that time as viewed from the bottom. In order to change the height of the chair, the lift button 392 protruding from the end of the gas spring 394 of the leg 7 must be pressed. By operating an elevating lever (not shown), the pressing plate 390 in contact with the tip of the elevating button 392 can be pushed down, and the switch of the elevating button 392 can be pressed.

  However, in the state of FIG. 78 (a), since the lift button lock plate 398 is inserted between the pressing plate 390 and the auxiliary disk 396 on the upper surface of the gas spring 394, the pressing plate 390 cannot be pushed down. . Therefore, the lifting mechanism can be locked.

  On the other hand, FIG. 78B shows a state in which the fitting material 364 of the armrest portion 344 with rack is fitted into the fitting material hole 366. At this time, since the L-shaped switch plate interlock 367 and the L-shaped switch plate 402 are pushed by the fitting material 364, the link device 400 is deformed as indicated by an arrow in FIG. 78 (b).

  At this time, the lift button lock plate 398 comes out of the gap between the press plate 390 and the auxiliary disk 396, so that the press plate 390 can move up and down and the lift button 392 can be pressed.

  Therefore, as shown in FIGS. 63 and 78 (b), the armrest 344 with a rack is in a position when the chair is used, and the sliding lock mechanism 346 is in a released state, that is, the fitting material 364 is a fitting material hole. In the state of being fitted in 366, the lift button lock plate 398 is removed, and the height can be adjusted.

  The lift button lock plate 398 is not limited to the operation by the link device 400, and the lift button lock plate 398 may be directly connected to the L-shaped switch plate 402.

  In that case, when the L-shaped switch plate 402 is inserted as in the case of using the link device 400, the lift button lock plate 398 is not pulled out in the direction opposite to the insertion direction, but the L-shaped switch plate. The lift button lock plate 398 is pushed out in the same direction as the insertion direction of 402.

  On the other hand, as shown in FIGS. 74 and 78 (a), the armrest portion 344 with rack is moved, the fitting material 364 comes out of the fitting material hole 366, and the sliding lock mechanism 346 is in the locked state. In this case, the elevation button lock plate 398 prevents the pressing plate 390 from pushing the elevation button 392, thereby preventing the height from being adjusted by mistake.

  Next, the gear locking mechanism 410 shown in FIG. 72 will be described. Normally, the push-up plate 418 is biased downward by the gravity and suspension spring 420 and is held by the push-up plate suspension material 419.

  The gear lock release plate 423 provided around the upper end of the outer cylinder 421 of the leg 7 presses the push-up plate 418 upward, so that the push-up plate 418 is against the chair main body 301 on the right side of the figure in the figure. The rear portion 416a is pushed upward.

  At this time, as shown in FIG. 79, the gear lock plate 416 with the rear portion 416a pushed up rotates about the gear lock fulcrum screw 414 as a support shaft, and the front portion 416b on the left side in the drawing moves downward.

  A gear stopper 412 can be fitted into a notch 353 formed on the side of the gear 352A with which the armrest 344 with a rack is engaged, and the gear 352A cannot be rotated when the gear stopper 412 exists.

  Therefore, the rotation of the gear 352A can be prevented by the distance between the gear lock release plate 423 provided around the upper end of the outer cylinder 421 and the push-up plate 418, that is, the distance from the bottom surface of the seat portion 303. . When the height of the chair body 301 is at the lowest position, the gear lock release plate 423 abuts on the push-up plate 418 and pushes up, so that the lock can be released only at the lowest position.

  Next, the deformation | transformation from a bed to a chair is demonstrated. By pulling back the armrest portion 344 with rack that has been pushed forward, the pinion 341 reversely rotates via the gear train 343 and the drawer portion 310 is accommodated.

  At this time, the bed leg 330 attached to the drawer 310 is similarly pulled back. The bed leg 330 is supported by the bed leg support 386 and stored while being pulled up to a horizontal state.

  Further, in the ratchet mechanism 370, the position guide protrusion 378 of the click 376 is lifted according to the shape of the abutment 384, so that the ratchet wheel 374 can freely rotate.

  Accordingly, the ratchet wheel 374 is interlocked with the bed leg portion 330 that returns to the horizontal state, and rotates in the direction opposite to that at the time of installation. The ratchet mechanism 370 slides to the right end portion of the ratchet guide groove 380 and the click guide groove 382 in the right direction in FIG.

  When the sliding of the ratchet mechanism 370 returns to its original position and stops, and the protrusion 332 of the bed leg 330 is disengaged from the fitting portion 374a of the ratchet wheel 374, the ratchet spring 385 disposed in the ratchet mechanism 370. And the ratchet wheel spring 373 corrects the position, and returns the position of the fitting portion 374a to the fixed position.

  When the armrest portion 344 with a rack returns to the original position, the drawer portion 310 is also completely stored. The height of the chair body 301 is adjusted again by returning the armrest portion 344 with the rack to the original position, the fitting material 364 is fitted into the fitting material hole 366, and the sliding lock mechanism 346 is locked. Is also possible.

  As described above, it is possible to provide a chair that can be easily transformed into a bed and restored to a chair while the user is sitting on the chair body 301 and can be used safely and easily. It becomes. The application is not limited to office chairs, but can be applied (hereinafter the same).

  A removable chair cover may be applied to the chair body 301. It can be washed and used cleanly.

  Moreover, you may make these chair covers, the above-mentioned blanket, etc. into a far-infrared fiber. Even without using an external power supply, warm and comfortable use is possible.

  Next, a thirteenth embodiment of the present invention is described. This embodiment is characterized in that in the twelfth embodiment, when the drawer 310 is pulled out, the use surface (upper surface) is raised so that no step is generated when the bed is used.

  FIGS. 80A and 80B are simplified side views of the present embodiment, and the end portion 310d of the lead-out portion 310B has a shape in which the top surface is lowered and a step is generated on the differential bottom surface. FIG. 80A shows a state when the chair body 301 is tilted horizontally, and FIG. 80B shows a state when the drawer 310 is pulled out.

  A rack 340 is engraved on the bottom surface of the drawer 310 as in the twelfth embodiment, and the rack is also engraved along the curved shape at the end 310d.

  The drawer portion 310 pulled out by the pinion 341 is pushed upward from the end portion 310d along the protruding shape of the bottom surface. As shown in FIG. 80 (b), the upper plate 303 a of the seat portion 303 is curved upward at the opening portion so as to match the shape of the end portion 310 d of the drawer portion 310.

  Next, the ratchet mechanism 370 will be described. FIG. 81 is a sectional view of the seat 303 at this time. The ratchet guide groove 380 and the click guide groove 382 are opened so as to curve in the same shape as the end portion 310 d of the drawer portion 310.

  The bed leg portion 330 protruding together with the drawer portion 310 is fitted to the fitting portion 374a of the ratchet wheel 374, and moves the ratchet mechanism 370 forward.

  The ratchet mechanism 370 rises along the ratchet guide groove 380 and the click guide groove 382 in the opening portion of the seat portion 303 as the drawer portion 310 moves.

  FIG. 82 is an overall perspective view of the drawer 310 in the present embodiment. A groove 312 having a T-shaped cross section is formed on the side surfaces of the lead portions 310A and 310B.

  As shown in FIG. 82, in the end portion 310d of the drawer portion 310, the groove 312 is formed deeply along with the change in the shape of the top surface and the bottom surface, and even if the T-shaped protrusion 320 is fitted, the drawer portion 310 can be raised.

  Next, the operation of this embodiment will be described. Similarly to the twelfth embodiment, after the backrest 305 is tilted to the horizontal state, the drawer 310 can be protruded from the chair body 301 by pushing the armrest 344 with a rack forward.

  The groove 312 engraved in the drawer part 310 is fitted with a T-shaped protrusion 320 projecting inside the seat part 303 and the backrest part 305, and has a function of holding the drawer part 310 and a sliding guide. ing.

  The drawer portion 310 has a flat bottom portion just before the end portion 310d and protrudes in parallel with the seat portion 303 and the T-shaped protrusion 320. When the end portion 310d is reached, the entire drawer portion 310 rises according to the curvature of the bottom surface.

  At this time, if the groove 312 engraved on the side portion of the drawer portion 310 is a uniform groove as in the twelfth embodiment, the T-shaped protrusion 320 is caught by the rise of the drawer portion 310 and the movement is caused. Will interfere.

  Accordingly, the groove 312 engraved in the end portion 310d has a width corresponding to the movement of the drawer portion 310 and does not hinder the upward movement.

  A bed leg portion 330 is attached to the side portion of the drawer portion 310, protrudes in conjunction with the drawer portion 310, and engages with a ratchet mechanism 370 disposed on both side surfaces of the seat portion 303.

  Since the ratchet guide groove 380 and the click guide groove 382 are curved and engraved, the fitted ratchet mechanism 370 can be raised at the opening portion of the seat portion 303 as the drawer portion 310 moves. The installation mechanism of the bed leg 330 after the fitting is the same as in the twelfth embodiment.

  As described above, it is possible to provide an office chair that can be easily transformed into a bed and a chair, and that can provide a comfortable feeling of use without causing a step even when the bed is used.

  In the twelfth and thirteenth embodiments, the drawer 310 has been described as being housed in the seat 303 and the backrest 305. However, as shown in FIG. 83, the drawer 310 may be housed in the bottoms of the seat 303 and the backrest 305 and pulled out from the bottom.

  Also, as shown in FIG. 84, the front part 310A and the rear part 310B of the drawer part 310 are separated, respectively, in the seat part 303 or forward from the bottom part of the seat part 303, and in the back part 305 or behind the back part 305, respectively. It is good also as a form which pulls out to a reverse direction, respectively.

  In this case, the lid 311 is disposed at both ends of the seat portion 303 and the backrest portion 305, and further includes a mechanism and an operation portion for projecting the drawer portion 310A forward, and a mechanism and an operation portion for projecting the drawer portion 310B backward. , Each operated independently. Further, the bendable part 310C of the drawer part 310 is not necessary.

  A mechanism and an operation unit that project the drawer 310A forward are the same as those in the twelfth and thirteenth embodiments, for example. In the case where the drawer portion 310B protrudes backward, the backrest portion 305 is protruded after being tilted to an arbitrary angle (not limited to horizontal) by the user. A sliding lock for fixing the position is applied to the protruding part 310B.

  FIG. 85 (a) is an enlarged view around the end of the backrest 305, and FIG. 85 (b) is a cross-sectional view taken along the line β-β in FIG. 85 (a). As shown in FIGS. 84 and 85, the protrusion 460 protruding from the drawer 310B can slide in the long hole 464 opened in the side of the backrest 305.

  The protruding portion 460 has a structure in which one end of a spring 460C is fixed to a “J” -shaped member formed by the sliding portion 460A and the fitting portion 460B, and the other end of the spring 460 is the drawer portion 310B. It is fixed to the side of the.

  When the protruding portion 460 slides to the end of the backrest portion 305, the fitting portion 460B is fitted into the lock hole 466 opened at the end portion side portion of the elongated hole 464 by the restoring force of the spring 460C of the protruding portion 460. Accordingly, the sliding of the protrusion 460 is locked, and the movement of the drawer 310B is stopped.

  When the drawer portion 310B is stored, the projecting portion 460 is pushed into the backrest portion 305 until the fitting portion 460B of the projecting portion 460 is released from the lock hole 466, so that the sliding portion 460A can again slide in the hole 464. Become.

  At this time, if the backrest 305 is raised to the chair state, the protrusion 460 automatically slides to the lower end of the hole 464 by the weight of the drawer 310B and returns to the original state.

  At this time, the height of the auxiliary legs can be freely set for both the feet and the head, so there is no restriction on the height when using the bed, and even if it is not at the lowest position, it can be used at a somewhat free height. It becomes possible.

  Further, by using a ratchet mechanism or the like for the backrest 305, the auxiliary leg can be set to an arbitrary height. Therefore, the auxiliary leg can be used without tilting the backrest part 305 horizontally, so that the bed can be used at a reclining angle that is free for the user.

  Furthermore, since the protruding distances of the drawers 310A and 310B are short (approximately half when the drawers 310A and 310B are linked and pulled out in the same direction), the scale of the gear is not reduced or used directly. It can be protruded, and the space can be reduced.

  Furthermore, the use surface cushions of the seat portion 303 and the backrest portion 305 may be shaped so as to have a V-shape that is recessed in the center when the bed is used.

  Furthermore, the above-described pillow portion 55 and the like may be disposed on the head.

1 Chair body
3 seats
3A bottom
3B, 3C Auxiliary extension
5 Backrest
7 legs
9 Armrest
10 Rear position adjustment lever
11 Seat plate
12 casters
13 Backboard
18, 19 Auxiliary legs
20 Reclining adjuster
30 Lever mechanism
40 Armrest body
41 Angle adjustment groove
43 Rod for angle adjustment
49 Armrest retaining plate
51 Back angle screw
53 Angle lock plate
55 Pillow Club
60 angle lock mechanism
63 angle lock spring
65 Spring chamber
66 retaining plate
67 disc
75 Swing mechanism
78 Swing plate
80 Auxiliary leg screw
81 Auxiliary leg operation rod
85 Screw position guide plate
90 reclining lock
93 Lock rod
94 Spring for restoration
97 Lock plate
98 Reclining lock plate stopper
120 keyboard stand
121 Keyboard height adjustment rod
125 units
126 Keyboard stand support plate
128 retaining screws
129 stand support screw
130 Keyboard stand arm
131 Extension
133 Mating plate height adjustment rod
134 Mating plate
140 Keyboard fixing member
145 Fixing member screw
146 Spring mechanism for fixing member
150 keyboard
151 Elbow cushion
152 Mouse operation table
154 Installation stand
155 Arm type support base
157 arm
159 Arm slide groove
162 Mouse base mounting plate
170 Mouse stand
171 Speaker
172 monitor
173 music player
174 Various telephones
175 earphone
176 TV speaker
177 camera
178 microphone
179 Sub display
180 cushion
301 Chair body
303 seat
305 Backrest
310 drawer
311 lid
314 cover
316 Drawer bar
330 Bed leg
340 racks
341 Pinion
343 gear train
344 Armrest with rack
346 Sliding lock mechanism
347 gear train cover
361 Operation lever
364 Fitting material
366 Hole for mating material
369 Opening fitting hole
370 Ratchet mechanism
374 Ratchet car
376 clicks
388 Crossing board
394 Gas Spring
398 Elevator button lock plate
400 Link device
402 L-shaped switch board
410 Gear locking mechanism
450 gap
460 Protrusion

Claims (1)

While it can be used as an office chair that goes to a desk, etc., it can be used as a bed when the backrest is tilted, and it can be used as a bed.
A seat where a person can sit,
A leg portion which is supported on the back surface of the seat portion and adjustable in height from the floor surface and is not fixed to the floor surface and is movable;
A backrest for receiving and holding the back of the person;
A rotation restricting means for restricting an angle of the backrest portion with respect to the seat portion to be equal to or greater than a first angle;
Rotation restriction release means for releasing the restriction of the rotation restriction means;
When the restriction is released by the rotation restriction release means, the backrest part is tilted relative to the seat part to the angle at which the person who is at the second angle beyond the first angle can comfortably or take a nap. And an angle adjustment means such as a nap that can be stopped,
Arranged in the seat and / or the backrest, folded in a plurality of stages, and overlapped so as to expand and / or slide freely, and after being expanded and / or slid, are in a continuous state; A chair comprising: an extension means having an auxiliary extension member that can be extended so as to have an area capable of holding the whole body from a person's feet to the head as a bed.

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