JP5814670B2 - Chair - Google Patents

Description

  The present invention relates to a chair.

  In a chair, the seat is attached to a seat receiving member (or a seat outer shell) so as to be slidable back and forth so that the front and back position of the seat can be adjusted, or the front portion of the seat can be wound down and deformed. Thus, the depth of the seat (or the longitudinal length of the seat) can be adjusted.

  In any case, it is not preferable that the seat is moved back and forth inadvertently or deformed. Therefore, in many cases, a lock device is provided so that the front and rear adjustment and the depth adjustment cannot be performed unless the lock is released. The lock device is provided with an operation tool, and the lock is released when a person moves the operation tool with his / her hand.

  The operation tool of the locking device is often a rotary lever. For example, in Patent Documents 1 and 2, the lever is configured to rotate about the longitudinal longitudinal axis, and a person who sits down places his fingertip on the lever. It is disclosed that the lever pivots when it is pulled up against the tip to release the lock. The lever is biased to the locked position by a spring, and when the person releases the hand, the lever returns to the locked position.

JP 2003-9988 A JP 2001-186554 A

  Now, in the case of levers that are raised and rotated upward as in Patent Documents 1 and 2, when the seated person adjusts the front and back position of the seat, the lever should be placed with the palm part against the side of the seat. The procedure is to wake up, then move the hand in either the front or back direction while holding the lever raised, move it to the desired position, and then release the fingertip from the lever.

  However, in the prior art, the movement direction of the person's hand is different between the lever raising operation (rotation operation) and the back-and-forth movement operation of the seat. Therefore, the action of pulling with the fingertip and the action of swinging the arm forward or backward Therefore, there was a problem in terms of quick operation.

  The present invention has been made to improve the current situation.

  The chair according to the invention of claim 1 comprises the entire seat or the entire back as a movable body, or part of the seat or part of the back as a movable body. In the configuration in which the movable body is movable when the provided operating tool is moved from the locked state to the free state, the operating tool is moved in either one direction or the other direction substantially parallel to the moving direction of the movable body. It is attached to the movable body so as to be in a free posture even when moved.

According to a second aspect of the present invention, in the first aspect, the seat portion includes a seat inner shell having a cushion on its upper surface, and a seat outer shell that supports the seat inner shell from below. By separating the shell into a fixed outer shell and a slide outer shell that is movable forward and backward, the slide outer shell is formed as the movable body, and the slide outer shell is moved back and forth. The front part of the seat inner shell stretches and deforms in a side view or is wound or deformed downward, and the operation tool is inserted into the slide outer shell in any direction before and after the locked state is sandwiched . It is attached so that it can be moved.

  In the invention of claim 3, in claim 1 or 2, the operation tool that moves in a linear direction and a lock member that slides in a direction orthogonal to the movement direction of the operation tool are attached to the movable body, The locking member slides in conjunction with the movement of the operating tool, so that the operating tool is switched between a locked state and a free state, and the operating tool is moved in one direction. And a first inclined guide surface that hits one end of the lock member, and a second inclined guide surface that hits one end of the lock member when the operating tool is moved in the other direction. The lock member is set to move in a free state regardless of which direction the operation tool is moved.

  In the present invention, the moving direction of the operating tool matches the moving direction of the movable body, and the operating tool is in a free state regardless of which direction it is moved. The movable body is moved after the lock is released in the initial stage of the hand movement. That is, when an attempt is made to move the movable body to a desired position, the lock is released and the movable body is moved by one action. For this reason, the movement adjustment of the movable body can be performed quickly and it is user friendly.

  Now, in the case of adjusting the longitudinal position of the seat as a movable body as in Patent Documents 1 and 2, it is difficult to move the seat back and forth if a person is still seated. Fore-and-aft position adjustment is performed with the hips lifted to some extent, but in this case, the chair must be held so that it does not move, for example, by pressing the leg with a foot, so the front-rear position of the seat Adjustment is troublesome.

  On the other hand, in the invention of claim 2 of the present application, only the front part of the seat is deformed, and the seat depth can be adjusted while seated. It is very easy to make adjustments.

  Although various configurations can be realized in which the operating tool is moved to any direction in any direction, the structure is very simple if the configuration in which the locking member is advanced and retracted by two inclined guide surfaces as in claim 3 is adopted. There are advantages that can be made.

The chair which concerns on embodiment is shown, (A) is the perspective view seen from the front, (B) is the perspective view seen from back, (C) is the isolation | separation side view. It is the isolation | separation perspective view which looked at the seat and its support mechanism from the top. It is the isolation | separation perspective view which looked at the seat and the intermediate metal fitting from the lower part. (A) is the isolation | separation perspective view in the state which turned the seat upside down, (B) is the isolation | separation perspective view of a seat outer shell and an intermediate metal fitting, (C) is the partial expansion perspective view of a seat outer shell. It is a separation perspective view of a seat. It is a separation perspective view of a seat. (A) is the top view of the principal part, (B) is the cross-sectional perspective view which looked at a part of (A) from the side. 7A is a cross-sectional view taken along the line VIIIA-VIIIA of FIG. 7A, FIG. 7B is a cross-sectional perspective view of FIG. 7A viewed from the direction B-B, and FIG. It is the cross-sectional perspective view seen from -C view direction. (A) is a cross-sectional view taken along the line IXA-IXA in FIG. 7 (A), and (B) is a cross-sectional view taken along the line IXB-IXB in FIG. 7 (A). 7A is a sectional perspective view of FIG. 7A viewed from the XA-XA viewing direction, FIG. 7A is a sectional perspective view of FIG. 7A viewed from the XB-XB viewing direction, and FIG. It is the cross-sectional perspective view which looked at (A) from the XC-XC viewing direction. (A) is a perspective view of the portion where the seat adjustment operating lever is mounted as seen from above, (B) is a perspective view of the seat adjusting operation lever and the seat outer shell, and (B) is the slide outer shell. It is a fragmentary perspective view. (A) is a separated perspective view of the seat adjusting operation lever and the slide outer shell, (B) is a separated perspective view of the seat adjusting operation lever, and (C) is a top view of the portion where the seat adjusting operation lever is mounted. It is the perspective view seen from.

  Next, an embodiment of the present invention will be described with reference to the drawings. In the following description, the words “front and rear” and “left and right” are used to specify the direction, but the words on the front and rear and right and left are based on the person who is seated. The front view direction is the direction facing the seated person, and therefore the left and right in the front view are opposite to the left and right viewed from the seated person.

(1). Outline of Chair First, an outline of a chair will be described mainly with reference to FIGS. This embodiment is applied to a swivel chair that is frequently used for office work and the like, and the chair is provided with a leg device displaying only the leg support 1 (see FIG. 1C) and the upper end of the leg support 1. It has a fixed base 2, a seat 3 disposed on the base 2, and a backrest 4 on which a seated person can lean. The base 2 is formed in a box shape opened upward. The planar view shape of the seat 3 is formed in a substantially rectangular shape with four corner portions rounded.

  For example, as shown in FIG. 2, an intermediate metal fitting (seat receiving metal fitting) 5 made of a metal plate is arranged on the base 2, and a resin seat outer shell 6 is attached to the intermediate metal fitting 5. It is also possible to connect the seat outer shell 6 to the base 2 without using the intermediate metal fitting 5.

The seat 3 includes a resin seat inner shell (seat plate) 7 and a seat cushion material 8 disposed on the upper surface thereof. The seat cushion material 8 is covered with a skin material (not shown) such as a cloth. Covered from. Seat outer shell 6, the attachment and the fixed outer shell 9 which is fixed to the intermediate sleeve 5 is constituted by a slide outer shell 10 that protrudes to the front, sliding outer shell 10 is freely move back and forth on the fixed outer shell 9 It has been. Slide outer shell 10 is an example of a movable body according to claim.

Further, a portion closer to the front side of the seat inner shell 7 is a deformation allowing portion 7 c that easily bends and deforms downward in a side view, and the front end portion of the deformation allowing portion 7 c is connected to the front end portion of the slide outer shell 10. ing. For this reason, when the slide outer shell 10 is slid back and forth, the deformation allowing portion 7c of the seat inner shell 7 extends forward or is wound downward. Thereby, the front-rear length of the seat 3 (or the depth of the seat 3) can be adjusted.

  For example, as shown in FIG. 2, a first back frame 11 is connected to the base 2 so as to be able to tilt backward, and a second back frame 12 positioned behind the first back frame 11 is fixed to the first back frame 11. The backrest 4 is attached to the second back frame 12. For example, as shown in FIG. 2, the first back frame 11 has an arm portion 11 a that extends forward at an outer position of the base 2, and the front end of the left and right arm portions 11 a is a horizontally elongated first shaft 13 and the base 2. It is connected to. Accordingly, the backrest 4 tilts around the axis of the first shaft 13.

  The chair according to the present embodiment is a synchro-type chair in which the seat 3 is retracted in conjunction with the backward tilt of the backrest 4 and, as can be understood from FIG. 2, the rear portion of the intermediate metal fitting 5 is connected to a bracket portion 15 projecting upward from the first back frame 11 by a horizontally elongated second shaft 16. Inside the base 2, a reaction force unit that elastically supports the back tilt of the backrest 4 and a gas cylinder for locking that controls the tilt of the backrest 4 are arranged. The direct relationship with the present invention is as follows. Details are omitted here.

(2) Relationship between the intermediate bracket and the seat outer shell The details of each part will be described below mainly with reference to the drawings from FIG. First, the relationship between the intermediate | middle metal fitting 5 and the seat outer shell 6 is demonstrated. For example, as shown in FIG. 3, the intermediate metal fitting 5 has a shape that is substantially close to a square in plan view, and has an upper plate 5a and left and right side plates 5b. The second shaft 16 penetrates the side plate 5b.

  As shown in FIG. 4, the fixed outer shell 9 is formed with a recess 18 that fits perfectly into the intermediate metal fitting 5. A pair of left and right forward stopper portions 19 are provided at the front end of the upper surface of the intermediate metal fitting 5, while the forward stopper portion 19 is fitted to the front end portion of the recess 18 in the fixed outer shell 9 from behind. The part 20 is formed integrally.

  Further, a left and right laterally long rectangular lock hole 21 is formed in the rear end portion of the upper plate 5 a in the intermediate metal fitting 5, while a lock that fits in the lock hole 21 in the rear end portion of the recess 18 in the fixed outer shell 9. The claw 22 is projected downward. The lock claw 22 is fitted into the lock hole 21 after being elastically deformed. Thereby, the fixed outer shell 9 is attached to the intermediate metal fitting 5 so as not to be detached. That is, the fixed outer shell 9 can be attached to the intermediate metal fitting 5 in one touch. Since the second shaft 16 enters the recess 18 of the fixed outer shell 9, it can be prevented from coming off without using a member such as a snap ring.

(3). Seat Inner Shell The seat inner shell 7 is a molded product made of a resin such as PP. For example, as clearly shown in FIGS. The rear support portion 7b is located behind the main support portion 7a, and the deformation permission portion 7c is located in front of the main support portion 7a. Roughly speaking, the main support portion 7a occupies a little less than half of the longitudinal length, and the rear support portion 7b and the deformation allowing portion 7c each occupy a range of about a quarter or more.

The seat inner shell 7 is gently curved in an upwardly concave shape when viewed from the front, and is gently inclined so that the height becomes higher as the rear support portion 7b goes rearward in the longitudinal side view. Further, the upper surface of the rear support portion 7b in order to increase the rigidity, and project upward to a group of ribs extending vertically and horizontally.

  The main support portion 7a of the seat inner shell 7 includes a group of center slits 24 that are located at the left and right intermediate portions and are long in the front-rear direction, a group of intermediate slits 25 that are formed in an arc shape on the outside, and outside the intermediate slits 25. A group of side slits 26 that are positioned and extend long in the front-rear direction is formed. In addition, the left and right side portions of the main support portion 7a and the rear support portion 7b are connected to each other, and left and right laterally elongated grooves 27 are formed between them. For this reason, the main support part 7a is easily extended downward and deformed by the body pressure of the seated person.

For example, as shown in FIGS. 6 and 7, the deformable portion 7c of the seat inner shell 7 is formed in a multi-row (multi) in the longitudinal direction in the horizontally long front slit 28 in three rows in the lateral direction, these front Due to the presence of the group of slits 28, the deformation-permitting portion 7c is permitted to be deformed from a posture that extends linearly in a side view to a posture that is wound downward and folded.

  A laterally inverted U-shaped bridge portion 29 is formed at the left and right intermediate portion and the left and right end portions of the deformation allowing portion 7c, and the strip-like portion divided forward and backward across the front slit 28 is a bridge portion. 29 is connected.

(4). Seat outer shell The fixed outer shell 9 and the slide outer shell 10 constituting the seat outer shell 6 are molded products made of resin such as PP. For example, as can be understood from FIG. 8 (A), the front end of the fixed outer shell 9 extends Biteiru to the rear of the deformable portion 7c of the seat inner shell 7 (Incidentally, the slits in FIG. 8 (A) is omitted.) . That is, the fixed outer shell 9 overlaps the entire main support portion 7a and rear support portion 7b of the seat inner shell 7 in plan view, and partially overlaps the rear portion of the deformation allowing portion 7c of the seat inner shell 7. It has become.

For example, as can be understood from FIG. 6, the fixed outer shell 9 is gently curved so as to be concave upward in a front view , and the rear portion is inclined rearwardly upward. A large number of ribs are formed on the upper surface of the fixed outer shell 9 in order to increase the rigidity. The fixed outer shell 9 is formed with a hole 30 that allows the main support portion 7a of the seat inner shell 7 to sink greatly.

For example, as shown in FIG. 6, the slide outer shell 10 includes a base portion 10 a having substantially the same lateral width as the fixed outer shell 9 and a planar spread, and arm portions 10 b protruding rearward from the left and right side portions of the base portion 10 a. Have. The base 10a is a rear even when taken advanced overlaps from above always fixed outer shell 9, when the cut is retracted, the overall most base 10a overlaps the fixed outer shell 9.

  The base 10a of the slide outer shell 10 is basically plate-shaped (may be lattice-shaped), and reinforcing ribs are formed on the upper surface so as to extend vertically and horizontally. Then, as shown in FIG. 6 and FIG. 9 (A), a plurality of first guide projections 31 having a head-view T-shape projecting from the front end portion of the fixed outer shell 9 are provided in a protruding manner. A longitudinal guide long hole 32 into which the first guide protrusion 31 cannot be removed and is movably moved back and forth is formed in the base portion 10a.

As can be understood from FIG. 6, the rear end portion of each guide slot 32 is a wide portion 32 a into which the head of the first guide protrusion 31 is fitted and detached. For this reason, by inserting the guide elongated hole 32 into the first guide protrusion 31 from the position of the wide width portion 32 a and then sliding the slide outer shell 10 backward, the base portion 10 a of the slide outer shell 10 is moved relative to the fixed outer shell 9. It is kept immovable.

As shown in FIG. 9B (see also FIG. 6), the arm portion 10b of the slide outer shell 10 is formed with a crank-shaped guide groove 33 that is a crank shape that opens downward and upward in a front sectional view. On the other hand, the fixed outer shell 9 is integrally provided with a substantially inverted L-shaped second guide projection 34 that fits in the guide groove 33 so that it cannot be removed. The guide groove 33, by shifting the downstream-out apertures position and the upward opening position to the left and right, forms a supporting portion 33a protruding to the left and right outward, while the second guide protrusion 34, the support portion An inward flange 34a located on 33a is formed. As shown in FIG. 12, the rear end portion of the guide groove 33 is a wide portion 33 b for allowing the second guide protrusion 34 to be fitted.

  As shown in FIG. 9, a narrow convex rail portion 35 is formed at the lower end of the arm portion 10 b, while the fixed outer shell 9 has a concave rail portion 36 into which the convex rail portion 35 is slidably fitted. The left and right positions of the slide outer shell 10 are regulated by the rail portions 35 and 36 being fitted to each other. The convex rail portion 35 extends to the vicinity of the front end of the fixed outer shell 9, and the concave rail portion 36 extends to the vicinity of the front end of the slide outer shell 10.

(5) Relationship between seat inner shell and seat outer shell The seat inner shell 7 is connected to both the fixed outer shell 9 and the slide outer shell 10 of the seat outer shell 6. This point will be described next.

  As shown in FIG. 6 and FIG. 10 (B), rail-shaped side support portions (side protrusions) 38 that are long in the front and rear directions are formed in a portion near the left and right side edges of the fixed outer shell 9 and substantially in the rear half. The support rib 39 of the seat inner shell 7 is placed on the side support portion 38. As shown in FIG. 10B, a horizontal step portion 40 is formed outside the support rib 39 in the main support portion 7 a of the seat inner shell 7, and slides below the step portion 40. The arm portion 10 b of the outer shell 10 is disposed, and an inward stopper piece 41 is formed on the inner wall portion of the stepped portion 40. The stopper piece 41 is surrounded from three sides by a punched hole 42 opened up and down.

  The protrusion 38 of the fixed outer shell 9 is integrally provided with a restraining piece 43 that covers the stopper piece 41 from above. That is, the left and right end portions of the main support portion 7a in the seat inner shell 7 are held so as not to move inwardly. Therefore, the main support portion 7a is deformed so as to sink downward due to the load of the seated person. Further, since the left and right side portions of the main support portion 7a are held by the side support portions 38 so as not to be lowered, the arm portion 10b of the slide outer shell 10 is the main support portion 7a of the seat inner shell 7 even when a person is seated. It will not be pushed downward. Accordingly, the arm portion 10b of the slide outer shell 10 can easily slide back and forth in the seated state.

  The punching hole 42 protrudes behind the stopper piece 41. For this reason, the restraining piece 43 is removed from the punching hole 42 by placing the seat inner shell 7 slightly in front of the predetermined position and then overlapping the fixed outer shell 9. Can be fitted into the rear. In this state, when the seat inner shell 7 is shifted backward, the restraining piece 43 is positioned on the stopper piece 41.

  As shown in FIG. 10 (C), support pieces 44 protruding inwardly toward the arm portion 10b of the slide outer shell 10 are separated in the front-rear direction at both left and right ends of the main support portion 7a in the seat inner shell 7. Are formed. Although the support piece 44 is for attaching a skin material, it can also hold | maintain the support function of the seat inner shell 7. FIG. In addition, you may provide separately the side rib which prevents that the right and left edge part of the seat inner shell 7 shifts | shifts inwardly.

As shown in FIG. 10 (A), the left and right rear portions of the fixed outer shell 9 are provided with hook-shaped rear engagement claws 45 having an upper portion formed in a fork, while the rear support portion 7b of the seat inner shell 7 is provided with Forms a rear engagement hole 46 that engages with and engages with the rear engagement claw 45 from above. The rear engagement hole 46 is also engaged with the rear engagement claw 45 by shifting the seat inner shell 7 to the fixed outer shell 9 and then shifting it backward.

  As shown in FIG. 8D, a center locking piece 47 that protrudes downward with the front end as a free end is provided at the left and right intermediate portions of the rear support portion 7b in the seat inner shell 7, while the fixed outer shell. 9, a center receiving portion 48 into which the center locking piece 47 is fitted so as not to move forward is formed as a recess. The center locking piece 47 is surrounded by slits on three sides except for the root, and therefore the center locking piece 47 can be rotated up and down with the root as a fulcrum. A hole 48 ′ is opened in the center receiving portion 48.

  As shown in FIG. 7, a side engagement portion 49 having a square shape in plan view is formed on the left and right outer sides of the center receiving portion 48 in the fixed outer shell 9, and the seat inner shell 7 is formed on the side engagement portion 49. Side engagement holes 50 provided in the rear support portion 7b are fitted. Thereby, the backward movement of the seat inner shell 7 is restricted. Eventually, the seat inner shell 7 is held by the center locking piece 47 and the side engaging portion 49 so that it cannot be displaced back and forth.

  A lock claw 22 (see FIG. 4) for attaching to the intermediate metal fitting 5 is provided at the side engagement portion 49. The lock claw 22 is provided with a finger hook piece 22a protruding upward. For this reason, the lock claw 22 can be disengaged from the intermediate fitting 5 by removing the seat 3 and pulling the finger-hook piece 22a forward.

  The connection structure of the front end portion of the seat inner shell 7 is shown in FIG. In other words, the support shafts 54 are integrally formed via the left and right downward bracket part pieces 53 at two positions on both the left and right sides of the center line of the deformation allowing portion 7c of the seat inner shell 7, while the slide outer shell 10 A bearing portion 55 into which the support shaft 54 fits from above is integrally provided at the front end. The support shaft 54 and the bearing portion 55 can rotate relative to each other.

  Accordingly, when the slide outer shell 10 is retracted, the front end of the deformation allowing portion 7c is pulled backward, and therefore, the deformation allowing portion 7c is wound down in a state where it is folded back. Thereby, the front-end position (depth of a front end) can be adjusted by changing the front-end position of the seat 3.

  As shown in FIG. 8C, a front stopper 56 protruding backward is provided at the front end of the deformation allowing portion 7c in the seat inner shell 7. This is for attaching a skin material covering the seat cushion 8.

(6). Seat length adjustment (depth adjustment) operation mechanism Next, an operation device for adjusting the front and rear seat lengths of the seat 3 will be described mainly with reference to FIGS. For example, as shown in FIG. 12B, the operating device includes an operating tool 58 that is mounted on the right side of the slide outer shell 10 so as to freely move back and forth, a lock member 59 that slides left and right as the operating tool 58 moves back and forth, And a spring (compression coil spring) 60 that urges the member 59 to a locked posture. The operation tool 58 and the lock member 59 are made of resin.

As clearly shown in FIGS. 12A and 12C, the lower surfaces of the left and right side portions of the slide outer shell 10 are inclined so as to be lowered toward the inside, and the bottom surface is flat on the inclined lower surface. A recess 61 is formed, and an operating tool 58 is disposed in the recess 61 so as to be movable back and forth. Operation tool 58 has a top plate 58a that overlaps the bottom surface of the recess 61, and a viewing portion 58b picked from the upper plate 58a was a semicircular plate shape projecting downward, the upper plate 58a, a slide outer shell An engagement protrusion 63 having a T-shape in front view exposed on the surface 10 is integrally formed. The slide outer shell 10 is formed with a longitudinal mounting hole 64 in which the engaging projection 63 is fitted so that it cannot be removed. The front end of the attachment hole 64 is formed with a wide portion 64a into which the engagement protrusion 63 can be fitted and removed.

  The lock member 59 has a left and right longitudinal rod shape, and is slidably fitted in a left and right longitudinal guide groove 65 provided on the lower surface of the slide outer shell 10. The guide groove 65 and the recess 61 are integrally continuous. The guide groove 65 is formed in a state where the convex rail portion 35 is divided.

As shown in FIG. 12B, the outer end of the lock member 59 facing the operation tool 58 is a U-shaped contact portion 59 a in a bottom view , while the operation tool 58 has a lock member 59. A recess 66 is formed to cover the abutment portion 59a from below, and the inner surface of the recess 66 is formed with inclined guide surfaces 66a and 66b having a V-shape as viewed from the bottom. That is, the inner surface of the recess 66 is formed with two first and second inclined guide surfaces 66a and 66b that are inclined in a bottom view (plan view) so that the interval is widened toward the lock member 59. Yes. Moving the operation member 58 forward, hits the first inclined guide surface 66a is the locking member 59 located on the rear side, moving the operation member 58 in the back, locks the second inclined guide surface 66b located on the front side member 59 It hits.

  A groove 67 into which the spring 60 is fitted is formed on the upper surface of the lock member 59, and one end of the spring 60 is in contact with the inner side surface 65 a of the guide groove 65. Accordingly, the lock member 59 is biased outward (in a direction toward the operation tool 58). Since the recess 66 of the operation tool 58 has a V shape, when no external force is applied to the operation tool 58, the lock member 59 is retracted outward and the contact portion 59a is deep in the recess 66. It fits in position and is held in a stable state. On the other hand, when the operation tool 58 is slid forward or backward, the lock member 59 moves forward inward by the guide action (push-out action) of the inclined guide surfaces 66a and 66b.

A stopper projection 68 that projects downward toward the fixed outer shell 9 is integrally provided at the inner end of the lock member 59. On the other hand, the fixed outer shell 9 is provided with a stopper receiving portion 69 into which the stopper projection 68 is fitted and removed when the lock member 59 moves left and right. The stopper receiving portion 69 is constituted by providing the inward ribs at intervals around a longitudinal vertical ribs 70, in this embodiment, are formed side by side five stopper receiving portion 69 back and forth. Therefore, the longitudinal length of the seat 3 can be adjusted in five stages. The vertical rib 70 forming the stopper receiving portion 69 is integrally connected to the side support portion 38 on which the main support portion 7a and the rear support portion 7b of the seat inner shell 7 are placed. It is in a stepped state.

  For example, as shown in FIG. 3, finger contact projections 71 having the same shape as the slide type operation tool 58 are integrally formed at a position symmetrical to the slide type operation tool 58 in the slide outer shell 10. For this reason, the front-rear adjustment of the seat 3 can be performed smoothly without being twisted. It is also possible to provide the slide type operation tool 58 on both the left and right sides of the slide outer shell 10. When the slide-type operation tool 58 is provided on the left and right, the lock member 59 can be provided on the left and right, or the lock member 59 can be provided only on one side and the one slide-type operation tool 58 can be a dummy. Is possible.

  As described above, even if the operating tool 58 is moved in any direction, the lock member 59 is detached from the stopper receiving portion 69, the lock is released, and the slide outer shell 10 can be moved back and forth as it is. Accordingly, when the person adjusts the depth of the seat 3, the lock is released by moving the operation tool 58 in a way that the slide outer shell 10 is desired to be moved, so that unlocking and movement of the slide outer shell 10 can be performed with one action. It can be carried out. Therefore, operability is good.

  Providing the operation tool 58 with a semi-disc shaped knob 58b is an advantage that the finger touch is good. In addition, since the user can pinch the knob 58b with, for example, the index finger and the middle finger, there is an advantage that the user can accurately stop at a desired position without being excessively pushed or pulled. In particular, when the operating tool 58 and the finger contact projection 71 are provided on both the left and right sides of the seat 2 as in the present embodiment, the degree of force applied to the seat 2 can be accurately controlled, so that the slide outer shell 10 moves with a bounce. It is possible to prevent excessively. As a result, it is more reliable to stop at a desired position. That is, the braking performance is excellent.

  When the front and rear positions of the slide outer shell 10 are adjusted stepwise as in the present embodiment, the stopper projection 68 is set so as to slightly touch the stopper receiving portion 59 in the free state, and the stopper projection 68 is one of the stopper receptacles. By giving a slight resistance to exceeding the portion 59, it is also possible to give a click feeling to the user.

(8). Others The present invention can be embodied in various ways other than the above embodiment. For example, it is also possible to apply to a chair that moves the entire seat back and forth as in Patent Documents 1 and 2. In addition, the present invention is a chair of a type that adjusts the height position by moving the entire backrest up and down, or a structure that bends and deforms the upper part of the backrest in a side view, and extends upward or wraps behind and deforms. It can also be applied to a chair that changes the height of the upper end of the backrest.

  The shape of the operation tool can be set arbitrarily. Further, the operation tool is not limited to a slide type, and a rotary type or a push type can also be adopted. For example, when applied to a seat, the operation tool can be horizontally rotated, so that a person can turn the hand against the operation tool from behind, or a person can turn the hand from the front to rotate, It can be configured to be in a free state even if it is rotated in any direction. In the case of the push type, the operation tool may be constituted by a button pushed from behind and a button pushed from the front.

  Various mechanisms such as a cam method and a link method can be adopted as the mechanism for moving the lock member in conjunction with the movement of the operation tool. It is also possible to interpose an intermediate interlocking member between a lock member that engages and disengages with a fixing member such as a fixed outer shell and an operation tool. Or it is also possible to give the operation tool itself a lock function without using a lock member.

  The present invention can be embodied in a chair. Therefore, it can be used industrially.

3 seats 5 Intermediate bracket (seat receiving member)
6 Seat outer shell 7 Seat inner shell 7c Deformation allowance (front support)
DESCRIPTION OF SYMBOLS 9 Fixed outer shell 10 Slide outer shell as an example of a movable body 58 Operation tool 58b Knob 59 Lock member 60 Spring 66 Recess 66a, 66b Inclined guide surface 68 Stopper protrusion 69 Stopper receiving part

Claims (3)

The whole seat or the entire back is made a movable body, or a part of the seat or a part of the back is made a movable body, and the operation tool provided on the movable body is in a free state from the locked state. The movable body is configured to be movable when moved to
The operation tool is attached to the movable body so as to be in a free posture even if it is moved in any one of one direction and the other direction substantially parallel to the moving direction of the movable body.
Chair. The seat portion includes a seat inner shell having a cushion on its upper surface and a seat outer shell that supports the seat inner shell from below, and the seat outer shell projects to a fixed outer shell and the front side thereof. by separating structure to the forwardly and rearwardly movably slide outer shell, wherein the slide outer shell forms and the movable body, extending the slide outer shell front portion of the seat inner shell as viewed from the side and is moved back and forth deformed It is designed to deform or get caught in the lower side,
Furthermore, the operation tool is attached to the slide outer shell so that it can be moved in any direction before and after the locked state is sandwiched .
The chair according to claim 1. The operation tool that moves in a linear direction and a lock member that slides in a direction orthogonal to the movement direction of the operation tool are attached to the movable body, and the lock member slides in conjunction with the movement of the operation tool. Therefore, the operation tool is switched between a locked state and a free state,
The operating tool includes a first inclined guide surface that hits one end of the lock member when the operating tool is moved in one direction, and a second inclined guide surface that hits one end of the lock member when the operating tool is moved in the other direction. And the locking member is set to move in a free state by moving the operation tool in any direction by the cam action of the inclined guide surface.
The chair according to claim 1 or 2.

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