JP5613411B2 - Furniture lever device and chair equipped with the same - Google Patents

Description

  The present invention relates to a furniture lever device and a chair provided with the same.

  In many cases, a chair is attached with a lever for adjusting the position or posture of a moving member, such as a lever for raising and lowering a seat and a lever for controlling locking. In most cases, the lever is of a rotary type, and the movement of the lever is transmitted to the operating member by a wire.

The wire is inserted through the tube, and when the lever is rotated in one direction by holding one end of the tube immovably and attaching the one end of the wire to the lever , the wire is pulled and an operating member (for example, a gas cylinder) The member that pushes the push valve) moves. An example of a lever device is disclosed in Patent Document 1. In Patent Document 1, a lever is rotatably attached to a support fixed to a frame of a chair with a screw, and a tube holding portion is attached to the support. The support and the lever are formed as one unit.

Japanese Utility Model Publication No. 7-21140

  Now, it is preferable that the chair can be assembled as easily as possible. In this regard, if the lever device is unitized as in Patent Document 1, it can be said that it can contribute to an increase in the efficiency of the assembly work. However, in Patent Document 1, the support is fixed to the frame of the chair with screws, so that the assembly workability is improved. It can be said that there is still room for improvement.

Moreover, in patent document 1, the slit which engages the edge part of a wire is formed in a lever so that a rotation axis may be crossed, Therefore, when a slack arises in a wire by a certain amount of elasticity, a wire will be from a slit. I am concerned that it will come off. Furthermore, in Patent Document 1, since the lever device is attached to the inside of the frame, for example, it is troublesome to replace the lever device.

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

The present invention is directed to a furniture lever device and a chair to which the furniture lever device is attached, and the lever device is specified in claims 1 to 3. In these invention of claim 1, lever equipment has a revolvable lever for operating draw inserted through wire into the tube, and a housing in which the lever is mounted, said lever Is provided with a wire holding part to which one end of the wire is attached, while the housing is provided with a tube holding part to which one end of the tube is attached. When the lever is rotated in one direction, the wire is pulled. In the basic structure that is supposed to be
The lever is provided with a support shaft portion as a first locking portion that engages with a first engagement portion provided on the furniture member, and the support shaft portion engages with the first engagement portion. By doing so, while the lever is rotatably held by the furniture member,
The housing is held by the lever so as not to be separated from the furniture member, and has a second locking portion that engages with a second engagement portion provided on the furniture member. The state attached to the member of the said furniture is hold | maintained by 2 latching | locking parts and a lever.

According to a second aspect of the present invention, in the first aspect of the present invention, the housing is held in a state of being attached to the furniture member by the support shaft portion of the lever.
According to a third aspect of the present invention, in the configuration based on the same premise as in the first aspect, the lever has a support shaft portion serving as a pivotal support point, and the support shaft portion is provided in a furniture member. The housing is held by the furniture member by the lever and moved in a direction intersecting the pivot axis of the lever. An engaging portion that fits into a second engaging portion of a member in the furniture is formed, and the housing is held in a non-detachable manner with respect to the furniture member by the engaging portion and the lever. .

A fourth aspect of the present invention, in any one of claims 1 to 3, the said lever and the housing, a positioning portion provided they prevented from moving shift the rotation axis direction of the lever Yes. The chair is specified in claim 4, and in this chair, a seat plate is fixed to an outer shell disposed below, and the lever device according to claim 1 is attached to the outer shell. Installed on.

Now, in the structure of patent document 1, since the pulling force by a wire acts so that a support body may be peeled from the flame | frame of a chair, there exists a possibility that intensity | strength may fall during use. On the other hand, in the invention of claim 1 of the present application, since the lever is rotatably attached to the furniture member, the pulling force of the wire does not act on the housing. Can be improved.

  If the structure of Claim 2 is employ | adopted, after engaging the latching | locking part of a housing in the 2nd engaging part of furniture, the support shaft part of a lever resists the 1st engaging part of the member of furniture against elasticity. The lever device can be attached to the furniture member by a simple procedure of fitting. For this reason, the assembly efficiency of furniture can be improved.

Moreover, if the structure of Claim 3 is employ | adopted, since the one end part will not remove | deviate from a lever even if a wire will loosen by a certain amount of bounce, the unexpected situation where a wire will remove | deviate from a lever can be prevented. In other words, when the wire is loosened, one end of the wire tends to move in the longitudinal direction, but one end of the wire does not come off the lever unless it is moved in the direction along the pivot axis of the lever. Since it is different from the direction of disengagement, it does not come off the lever even if the wire is loosened by some kind of bounce. Further, the wire is kept attached to the lever before being attached to the furniture, and the ease of assembly is also improved in this aspect.

It is a figure which shows the whole chair which concerns on embodiment, (A) is a perspective view, (B) is a side view. FIG. FIG. (A) is the perspective view in the state which united the lever apparatus, (B) is the isolation | separation perspective view of a lever. (A) is the perspective view which isolate | separated the lever apparatus and was seen from the side, (B) is the perspective view of a lever. (A) is the perspective view which looked at the principal part from the inner lower side, (B) is the perspective view of the state which isolate | separated the lever apparatus . (A) is the fragmentary perspective view which looked at the principal part from the lower outside, (B) is the fracture | rupture perspective view which looked at the principal part from the top, (C) is the fragmentary perspective view of an outer shell. (A) is the perspective view which isolate | separated the lever and the outer shell, and was seen from the top, (B) is the perspective view which isolate | separated the lever apparatus and the outer shell, and was seen from the downward direction. (A) is a perspective view from the side in a state where the lever is separated, and (B) is a partial side perspective view of the outer shell 13.

Next, an embodiment of the present invention will be described with reference to the drawings. This embodiment is applied to a swivel chair frequently used for office work. Use word "longitudinal", "lateral" to identify the direction in the following description (and claims) are, which is human normal sitting condition is based on the directions viewed. The front view is as seen from the direction facing the seated person. In addition, although the words “inside” and “outside” are used, the inside means the side facing the center of the chair in the left-right direction, and the outside means the side facing the outside of the chair in the left-right direction.

(1). Outline of chair First, the outline of the chair will be described with reference to FIGS. The chair includes, as main elements, a leg device 1 having a leg column 2 made of a gas cylinder, a base 3 fixed to the upper end of the leg column 2, a seat 4 disposed above the base 3, and a back that constitutes a backrest 5. It has a frame 6. The leg device 1 includes a plurality of branch legs extending radially, and a caster is provided at the tip of each branch leg. Only a part of the limbs is displayed.

  The chair also has a back frame 7 extending in the front-rear direction on both the left and right sides of the base 3, and a back column 7 a extending upward is integrally provided at the rear part of the back frame 7. The back frame 6 is fixed with screws. A mesh-like sheet material 8 is stretched on the back frame 6.

  The back frame 7 is connected to the base 3 by a cylindrical body 9 so as to tilt backward with the front end portion as the center. Although details will be described later, a torsion bar as an example of a spring means is built in the cylindrical body 9, and the backrest 5 tilts backward against the elasticity of the torsion bar.

  As shown in FIG. 2, the seat portion 4 includes a resin seat plate (inner shell) 11, a cushion material 12 stretched on the upper surface thereof, and a resin outer shell 13 disposed below the seat plate 11. Yes. Needless to say, the cushion material 12 is covered with a skin material such as a cloth. The outer shell 13 is attached to a seat receiving member 14 having a substantially square frame shape in plan view disposed below the outer shell 13 so that the front / rear position can be adjusted.

  As shown in FIG. 3, a pair of left and right support cylinders 15 project from the left and right outwards on the front side surface of the base 3, and a front link 16 is rotatably fitted in the support cylinder 15. A seat receiving member 14 is connected to an upper end portion of the front link 16 by a front pin 17 so as to be relatively rotatable. The seat receiving member 14 is provided with left and right front bracket portions 18, which are connected to the front link 16.

  A rear bracket 19 protrudes downward from the rear portion of the seat receiving member 14, and a lower end of the rear bracket 19 and the back frame 7 are connected by a rear pin 20. The rear pin 20 is slidably fitted in a guide long hole 21 formed on the inner surface of the back frame 7. Then, the rear link 20 slides through the guide slot 21 of the back frame 7 while the front link 16 is tilted backward, thereby allowing the back frame 7 to tilt backward. A member denoted by reference numeral 22 in FIG. 3 is a rear link that rotates during locking, and a lumbar pad (not shown) is attached to the upper end of the rear link 22.

  The base 3 has a box-like shape opened upward, and is closed by front and rear covers 23 as shown in FIG. Further, since it is not directly related to the present invention, a detailed description is omitted. However, an elevating operation device for releasing the lock of the leg column and the locking of the backrest 5 are controlled inside the base 3. The tilt control device is built in, and the operating member of the lifting operation device and the operation member of the tilt operation device are operated from the cover 23 by the wire 25 inserted through the tube 24. More precisely, the actuating member of the tilting operation device is operated with the wire 25 arranged on the right side of the base 3, and the actuating member of the lifting operation device is operated with the wire 25 arranged on the left side of the base 3.

  For example, as shown in FIG. 1, on the right side of the outer shell 13, two front and rear lever devices 27 having a lever 26 are arranged to pull the wire 25. The up / down operation wire 25 is connected to one of the two front and rear levers 26, and the tilt operation wire 25 is connected to the other lever 26. The front and rear lever devices 27 have the same structure.

(2) Lever device / outer shell Next, the structure of the lever device 27 and the structure of the outer shell 13 related thereto will be described with reference to FIG. For example, as shown in FIG. 4, the lever device 27 includes a lever 26 and a housing 29 configured to cover the lever 26 from above.

The lower surfaces of the left and right side portions of the outer shell 13 are inclined so as to increase as they go outward. For example, as shown in FIGS. 8B and 9, the lever device 27 is fitted on the right side portion of the outer shell 13. A full storage recess 30 is formed. The storage recess 30 includes left and right side plates 31 and a substantially horizontal upper plate 32 as elements constituting the inner surface thereof. Further, a substantially vertical first wall portion 33 is continuous with the upper plate 32. In addition, a substantially horizontal step 34 is continuous with the lower end of the first wall 33, and a second wall 35 is continuous with the step 34. The lower end of the second wall portion 35 is located above the side portion of the outer shell 13, Therefore, the right portion of the outer shell 13 is in a state which is cut open downward at a point of the housing recess 30 .

On the other hand, the housing 29 constituting the lever device 27 is generally become tightly fits form housing recess 30. That is, the housing 29 has left and right side plates 36 that overlap the side plate 31 of the storage recess 30, and a top plate 37 that overlaps the upper plate 32 of the storage recess 30 from below. As an example of the second locking portion described in the claims, a hook-shaped locking claw 38 is formed in front view. On the other hand, as shown in FIG. 9B, the outer shell 13 is provided with a step-like second engaging portion 39 into which the locking claw 38 is fitted. The outer shell 13 is open upward at the location of the second engagement portion 39. For this reason, the die-cutting after shaping | molding becomes easy.

  For example, as can be easily understood from FIG. 4, a tube holding portion 40 into which the tube 24 is fitted from above is formed in a portion of the housing 29 inside the top plate 37. The tube holding part 40 is connected to the front and rear side plates 36, and the first rib 42 into which the holding groove 24a provided at the end of the tube 24 is fitted so as not to be displaced, and the second rib 43 into which the wire 25 is loosely fitted. Is forming. In addition, an arcuate wire receiving portion 44 that guides the wire 25 to be pulled in a bent state is provided outside the second rib 43.

Tube holding portion 40 is formed in a state of protruding from the side plate 36 to the inside, where the rear end surface 36a of the side plate 36 is in the state of the stepped portion against the side of the tube holding portion 40. Therefore, as shown in FIG. 9B, a stepped portion 45 is formed in the housing recess 30 of the seat receiving member 14 so that the rear end surface 36 a of the side plate 36 in the housing 29 abuts or is close thereto. The tube 24 is disposed below the outer shell 13.

  Therefore, the lever device 27 can be attached to the outer shell 13 from the outside with the tube 24 and the wire 25 being connected. Therefore, the wire 25 does not get in the way of assembling the chair, and the lever device 27 can be easily replaced. This is a significant feature of the present embodiment with respect to Patent Document 1.

For example, as can be understood from FIG. 4B, a wire holding portion 47 that enters the inside of the housing 29 protrudes inward from the upper end portion of the lever 26. A ball holding groove 49 into which a ball 48 provided at the tip of the wire 25 is fitted is formed in the inner end portion of the wire holding portion 47. The ball holding groove 49 is formed so as to extend in the front-rear direction and is open only on the front side (may be open only on the rear side), and as shown in FIG. An inclined guide surface 49a is formed. Further, the wire holding portion 47 is formed with a wire insertion groove 50 communicating with the ball holding groove 49.

  Therefore, the ball 48 of the wire 25 is inserted into the wire holding groove 50 by moving from the near side along the rotational axis direction of the lever 26. In this case, the ball 48 can be easily fitted by the presence of the guide surface 49a. A side-view V-shaped wire support groove 51 communicating with the wire holding groove 50 is formed at the inner end of the wire holding portion 47.

A housing receiving portion 52 on which the side plate 36 of the housing 29 overlaps is formed on the lever 26 on the front and rear outside of the wire holding portion 47. Accordingly, the lever 26 is in a state sandwiched between front rear plate 36 of the housing 29. An upward piece 53 projects from the lever 26 at the front and rear outer sides of the housing receiving portion 52 and at the left and right outer ends. The front and rear upward piece 53 has a circular shape in front view as a first locking portion . The support shaft portion 54 is formed so as to protrude outward and forward.

  On the other hand, as shown in FIGS. 8B and 9A, for example, a first engagement portion 55 into which the support shaft portion 54 of the lever 26 is fitted is provided on the front and rear inner surfaces of the storage recess 30 in the outer shell 13. A dent is formed. The bottom surface of the first engaging portion 55 has a semicircular shape, and thus the lever 26 rotates smoothly. The support shaft portion 54 of the lever 26 is fitted into the first engagement portion 55 by elastically deforming the upward piece 53. In order to facilitate the fitting of the support shaft portion 54 in this case, a guide surface 54 a that is inclined in a side view is formed on the outer end surface of the support shaft portion 54. The first engaging portion 55 is opened upward for the purpose of facilitating die-cutting after molding.

For example, as shown in FIG. 4, the wire holding portion 47 of the lever 26 is formed with a positioning groove 56 that opens upward in the front and rear intermediate portions as the positioning portion described in the claims. On the other hand, the housing 29 is provided with positioning projections 57 that fit into the positioning grooves 56 as positioning portions described in the claims. The front and rear positions of the lever 26 and the housing 29 are also regulated by fitting the positioning protrusions 57 and the positioning grooves 56 together.

(3) Summary The lever device 27 is attached in the following procedure. That is, first, the wire 25 is passed through the inside of the housing 29 to set the ball 48 on the lever 26, and then the positioning groove 56 of the lever 26 is fitted into the positioning projection 57 of the housing 29, and then the tube 24 is connected to the first of the housing 29. Next, the locking claw 38 of the housing 29 is fitted into the second engagement portion 39 of the outer shell 13, and finally the support shaft portion 54 of the lever 26 is fitted to the first engagement portion 55 of the outer shell 13. Fit into. As described above, the ball 48 of the wire 25 is fitted into the ball holding groove 49 of the lever 26 from the labor side.

In this state, the inner end of the housing 29 is held by the locking claw 38 so as not to move inward and not to fall off, and the outer end cannot be moved outward by the support portion 54 of the lever 26. It is held so that it cannot fall. Accordingly, the lever device 27 can be attached to the outer shell 13 by a one-touch operation of fitting the locking claw 38 of the housing 29 into the outer shell 13 and fitting the support shaft portion 54 of the lever 26 into the outer shell 13. it can.

In this case, as clearly shown in FIG. 5, the front end portion of the side plate 36 in the housing 29 is in a posture close to vertical in a front view. Therefore, the forward movement of the housing 29 is the support shaft portion of the lever 26 . 54 is definitely blocked. Similarly, as can be understood from FIGS. 5 and 8B, the upper end of the lever 26 has an arc shape when viewed from the front, and the arc-shaped portion 26 a is in contact with the top plate 37 of the housing 29. For this reason, the lever 26 rotates smoothly.

(4). Others present invention can be in addition to various concrete than the above embodiment. For example , the lever device can be used not only for chairs but also for other furniture. When mounting on a chair, etc. Do attached to the frame member or attached to the armrest apparatus, the mounting position can be arbitrarily set.

  The present invention is applied to a chair and exhibits its usefulness. Therefore, it can be used industrially.

1 Leg device 3 Base 4 Seat 11 Seat plate (inner shell)
DESCRIPTION OF SYMBOLS 13 Outer shell 14 Seat receiving member 24 Tube 25 Wire 26 Lever 29 Housing 30 Storage recessed part 38 Locking nail | claw as a 2nd locking part 39 2nd engaging part 40 Tube holding part 42 of housing 42 The 1st for hold | maintaining a tube Rib 47 Lever wire holding part 48 Ball
54 Support shaft portion 55 as the first locking portion 55 First engaging portion

Claims (5)

A rotating lever for pulling and operating the wire inserted through the tube, and a housing to which the lever is attached;
The lever is provided with a wire holding portion to which one end of the wire is attached, while the housing is provided with a tube holding portion to which one end of the tube is attached, and the lever is rotated in one direction. The wire is supposed to be drawn,
The structure
The lever is provided with a support shaft portion as a first locking portion that engages with a first engagement portion provided on the furniture member, and the support shaft portion engages with the first engagement portion. By doing so, while the lever is rotatably held by the furniture member,
The housing is held by the lever so as not to be separated from the furniture member, and has a second locking portion that engages with a second engagement portion provided on the furniture member. 2 The state of being attached to the furniture member is retained by the locking portion and the lever.
Furniture lever device. The housing is held attached to the furniture member by the support shaft portion of the lever.
The furniture lever device according to claim 1. It has a rotary lever for pulling and operating the wire inserted through the tube, and a housing to which the lever is mounted, and the lever is provided with a wire holding portion to which one end of the wire is attached. On the other hand, the housing is provided with a tube holding portion to which one end of the tube is mounted, and the wire is pulled when the lever is rotated in one direction,
The lever has a support shaft portion that serves as a pivot point of the lever, and the support shaft portion is fitted into a first engagement portion provided in a furniture member by elastic deformation, while the housing Is held by a member of the furniture by the lever, and a locking portion that fits into the second engaging portion of the member in the furniture is formed by moving the housing in a direction crossing the pivot axis of the lever. The housing is configured to be held in a non-detachable manner with respect to the furniture member by the locking portion and the lever.
Furniture for the lever device. The lever and the housing are provided with a positioning portion for preventing them from shifting in the direction of the pivot axis of the lever.
The lever apparatus for furniture described in any one of Claims 1-3. A chair having the lever device according to any one of claims 1 to 4, wherein a seat plate is fixed to an outer shell disposed below the seat device, and the lever device is attached to the outer shell.
Chair .

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