JP6731830B2 - Mounting structure of rotation operation member and furniture including the same - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for attaching a rotating operation member such as an operation lever, and a furniture such as a chair or a table provided with the structure.

Some furniture such as chairs and tables are provided with an adjusting mechanism for adjusting the front and rear positions and heights of the seat and the top plate. In this type of furniture adjusting mechanism, a lock portion and the like are operated by a rotating operation member such as a rotating operation lever.

Most of the rotary operation members used for the furniture are attached to the support structure so as to be rotatable within a predetermined operation angle range. A pivot is provided so as to project from one of the rotation operation member and the support structure, and a pivot holding portion that holds the pivot so as to be rotatable is provided on the other (see, for example, Patent Documents 1 and 2).

In the chair described in Patent Document 1, a pair of pivots are arranged on a seat frame that is a support structure so as to be separated from each other on the same axis, and each pivot on the seat frame is fitted into a rotation operation member (operation lever). A pair of substantially C-shaped pivot holding portions are formed. A dropout restricting portion having a function of expanding the diameter of the pivot holding portion at the time of assembly is integrally formed at an end of each pivot. The rotation operation member is attached to the seat frame by the pivot holding portion being rotatably fitted to the corresponding pivot, and the pivot holding portion being restricted in axial displacement by the pull-out regulating portion.
When the assembly is assembled, the pivot operation member is expanded by temporarily fitting the substantially C-shaped pivot holding portion into the slip-off restricting portion, and the pivot operation member is slid in the axial direction to hold the pivot holding member. The parts are pivotally fitted to the corresponding pivots.

Further, in the chair described in Patent Document 2, a rotation operation member (operation lever) is rotatably attached to a seat frame that is a support structure via a separate mount member. A pair of pivots projecting in opposite directions project from the turning operation member, and a pair of holding walls projectingly hold corresponding pivots project from the mount member. The pivot of the rotation operating member pushes the pair of holding walls of the mount member and fits into the support hole of the corresponding holding wall, and the mount member is screwed to the seat frame while holding the rotation operating member. Fastened and fixed.

JP, 2014-070671, A Japanese Patent No. 5824304

The mounting portion of the rotation operation member described in Patent Document 1 pushes open the substantially C-shaped pivot holding portion by the slip-off restriction portion, and in that state, slides the rotation operation member in the axial direction of the pivot shaft to form a seat frame. Since the structure is assembled to the corresponding pivot on the side, a large load acts on the pivot holding portion when the rotary operation member is assembled, which makes it difficult to assemble the rotary operation member.

Further, the mounting portion of the rotation operation member described in Patent Document 2 spreads a pair of holding walls of the mount member to fit the pivot shaft of the rotation operation member into the support hole of the corresponding holding wall, and mounts in that state. Since the member is screwed to the seat frame, a large load acts on the mount member and the pivot when the pivot of the rotary operation member is fitted into the corresponding holding wall of the mount member. Assembling work of the dynamic operation member becomes difficult.

In view of this, the present invention provides a mounting of a rotary operation member that can be easily assembled to a support structure without imposing a large load on the component member when the rotary operation member is assembled, thereby improving assembly workability. It is intended to provide a partial structure and a furniture including the partial structure.

In order to solve the above-mentioned problems, the structure for attaching the turning operation member according to the present invention has the following configuration.
A mounting portion structure of a turning operation member according to the present invention includes a support structure, a pivot provided on one of the turning operation members pivotally supported by the support structure, the support structure, and the support structure. A pivot holding portion which is provided on the other of the turning operation members, holds the pivot in a rotatable manner, and has an insertion opening into which the pivot can be inserted and engaged in a direction substantially orthogonal to the axial direction of the pivot, Detachment restricting means for restricting disengagement of the pivot from the pivot holding part through the insertion opening, wherein the disengagement restricting means is configured such that a relative rotational position of the pivot holding part and the pivot is the rotation. When the operating member is in the first relative position range separated from the operating angle range during use, the insertion and removal of the pivot shaft with respect to the insertion opening are allowed, and the relative rotational position of the pivot shaft holding portion and the pivot shaft, When the position range is out of the first relative position range, the assembly position limiting function part for restricting the insertion/removal of the pivot with respect to the insertion opening, and the relative rotational position of the pivot holding part and the pivot are the above-mentioned. And a rotation restriction function section for restricting rotational displacement of the pivot holding section and the pivot into the first relative position range in a state of being displaced within the operation angle range during use. To do.

With the above configuration, when assembling the rotation operation member to the support structure, for example, the following assembling procedure can be adopted.
First, the relative rotational position of the pivot holding part and the pivot is set to a position within the first relative position range (a position where the insertion/removal of the pivot is allowed by the assembly position limiting function part), and in that state, the pivot is passed through the insertion opening. The pivot holding portion is inserted and engaged in a direction substantially orthogonal to the axial direction. Thereafter, the relative rotational position of the pivot holding portion and the pivot is displaced within the operating angle range during use, and in that state, the rotation restricting function portion rotates the pivot holding portion and the pivot to the first relative position range. Restrict dynamic displacement.
As a result, the relative rotational position of the pivot holding portion and the pivot is maintained in a position range outside the first relative position range, and the assembling position limiting function portion restricts the removal of the pivot from the insertion opening. In this case, since the removal of the pivot from the insertion opening is restricted by the cooperation of the assembly position limiting function part and the rotation restricting function part, a large load is applied to the component members when the rotation operation member is assembled to the support structure. It becomes difficult to work.

The assembly position limiting function portion has a non-circular outer peripheral surface of the pivot shaft, which has an arc portion having an arc shape centered on the axis of the pivot shaft and a straight line portion linearly connecting both end portions of the arc portion. A narrower than the maximum diameter of the outer peripheral surface of the arc portion of the pivot, and the insertion opening formed in an opening width wider than the minimum diameter of the outer peripheral surface including the straight portion of the pivot, The pivot shaft and the insertion opening are inserted into the insertion opening in an angular posture in which the pivot shaft has the minimum diameter when the relative rotational positions of the pivot shaft holding portion and the pivot shaft are in the first relative position range. It may be formed as described above.
In this case, when the rotation operation member is assembled to the support structure, the relative rotational position of the pivot holding portion and the pivot is adjusted to be within the first relative position range, and in that state, the pivot opening is inserted into the insertion opening of the pivot holding portion. Is inserted from a direction substantially orthogonal to the axial direction. At this time, the minimum diameter portion of the pivot passes through the insertion opening. When the relative rotational position between the pivot holding portion and the pivot is displaced from this state to the operating angle range in use, the width of the pivot facing the insertion opening becomes larger than the minimum diameter. In this state, when the rotational displacement of the pivot holding portion and the pivot to the first relative position range is regulated by the pivot regulating function portion, the removal of the pivot from the insertion opening is regulated.
In this case, the assembly position limiting function unit can be configured with a simple structure having a small number of parts.

The pivot holding portion has an arc surface that slidably holds the arc portion of the pivot, and an abutting surface that can abut the straight portion of the pivot inside the insertion opening. The contact surface may be in contact with the linear portion of the pivot to limit the operation angle range of the rotation operation member when in use.
In this case, when the pivot is inserted inside the insertion opening, the outer peripheral surface of the pivot is guided in the rotation direction by the arcuate surface in the insertion opening, and the straight portion of the pivot contacts the contact surface in the insertion opening. Can be contacted. The rotary operation member is restricted in the operation angle range during use by the linear portion of the pivot shaft contacting the contact surface in the insertion opening. In this case, the operating angle range when the rotary operation member is used can be restricted by a simple configuration with a small number of parts.

In the rotation restricting function portion, in a state where the pivot shaft is assembled to the pivot shaft holding portion, a portion on the rotation operation member side and a portion on the support structure side contact with each other so that the pivot holding portion and the pivot shaft are connected to each other. The rotational displacement within the first relative position range may be restricted.
In this case, the rotation restricting function part can be configured with a simple structure.

The support structure includes a base member and an assembly member that is assembled by being displaced in one direction with respect to the base member, and the rotation operation member has the axis line along the one direction. When the assembly member is assembled to the assembly member and the assembly member is assembled to the base member, the pivot operation member side portion and the base member side portion are brought into contact with each other, so that the pivot holding portion. The rotational displacement of the pivot to the first relative position range may be restricted.
In this case, when attaching the rotation operation member to the support structure, first, the pivot holding portion and the pivot are assembled in the first relative position range, and the rotation operation member is temporarily assembled to the assembly member of the support structure. Next, in this state, the assembly member of the support structure is displaced in one direction with respect to the base member and assembled. As a result, the rotation operation member side portion and the base member side portion come into contact with each other, so that the rotation displacement of the pivot holding portion and the pivot to the first relative position range is restricted. Therefore, the rotational displacement of the pivot holding portion and the pivot to the first relative position range can be restricted by a simple configuration that is easy to assemble.

The base member has a plurality of positioning recesses arranged along one direction, and the mounting member is a slide member slidably mounted on the base member in the one direction. The moving operation member is rotatably assembled to the slide member and has a positioning projection that is selectively engaged with any one of the positioning recesses of the base member. The recess may form a slide lock mechanism that fixes the slide position of the slide member with respect to the base member, and the rotation restriction function unit.
In this case, the positioning concave portion and the positioning convex portion of the slide lock mechanism and the rotation regulating function portion are engaged with each other by engaging the positioning concave portion provided on the base member and the positioning convex portion provided on the rotation operation member. Since it also serves as a component, it is possible to reduce the number of components.

The furniture according to the present invention is characterized by including the mounting portion structure of any one of the rotation operation members.

According to the present invention, since the removal of the pivot from the insertion opening is restricted by the cooperation of the assembly position restricting function part and the rotation restricting function part, when the rotation operation member is assembled to the support structure, the component does not become a constituent member. It becomes difficult for a large load to act, and as a result, it becomes possible to easily assemble the rotation operation member to the support structure. Therefore, by adopting the present invention, the workability of assembling the rotation operation member can be improved.

It is the perspective view which looked at the chair concerning one embodiment of the present invention from the side. It is the perspective view which looked at the chair concerning one embodiment of the present invention from the back (back side). It is the perspective view which looked at the chair concerning one embodiment of the present invention from the lower left front. It is the figure which looked at a part of chair concerning one embodiment of the present invention from the lower part. It is the perspective view which looked at a part of chair according to one embodiment of the present invention from diagonally right above. It is sectional drawing which follows the VI-VI line of FIG. 5 of the chair which concerns on one Embodiment of this invention. It is sectional drawing which follows the VII-VII line of FIG. 4 of the chair which concerns on one Embodiment of this invention. It is the perspective view which looked at a part of seat of the chair concerning one embodiment of the present invention from the lower part. It is the figure which looked at a part of seat of the chair concerning one embodiment of the present invention from the lower part. It is a perspective view which made a section a part of constituent members of a chair concerning one embodiment of the present invention. It is sectional drawing which follows the XI-XI line of FIG. 4 of the chair which concerns on one Embodiment of this invention. It is sectional drawing which follows the XII-XII line of FIG. 4 of the chair which concerns on one Embodiment of this invention. It is sectional drawing which showed typically the structure of the attachment part of the operation lever which concerns on one Embodiment of this invention, and an assembly procedure. It is sectional drawing which showed typically the structure and attachment procedure of the attachment part of the operation lever which concerns on other embodiment of this invention. It is sectional drawing which shows the structure of the attachment part of the operating lever which concerns on other embodiment of this invention.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view of a chair 100, which is one form of furniture, as seen from the side. FIG. 2 is a perspective view of the chair 100 seen from the rear (back side).
In the following description, for convenience of description, a direction in which a seated person seated on the seat body 4 in a normal posture faces forward is referred to as “front” and the opposite direction is referred to as “rear”. In addition, the up, down, left, and right directions in the following description mean directions that coincide with the directions around the seated person when the seated person sits on the seat body 4 in the normal posture. In addition, an arrow FR pointing forward, an arrow UP pointing upward, and an arrow LH pointing left are written in appropriate places in the drawing.

As shown in FIGS. 1 and 2, the chair 100 includes a leg 1 installed on the floor surface F, a box-shaped support base 2 installed on the upper part of the leg 1, and a box-shaped support base 2 installed on the support base 2. The seat receiving member 3 attached, the seat body 4 supported on the upper portion of the seat receiving member 3 so as to be positionally adjustable in the front-rear direction, and the seat base 4 pivotally supported on both sides of the support base 2 and not shown in the support base 2. A backrest support body 70 having a substantially L-shape in side view that can be tilted by a reclining mechanism, a backrest body 71 attached to a front side of an upper portion of the backrest support body 70, and a front side of a lower side of the backrest support body 70. A pair of left and right armrests 74 attached to the edges and on which the elbow tips of a seated person are placed. The backrest support body 70 and the backrest body 71 constitute a backrest 7 that supports the load on the back of the seated person.

The leg 1 includes a multi-leg 11 with casters 11A, and a pedestal 12 that stands up from the central portion of the multi-leg 11 and that houses a gas spring (not shown) that is an elevating mechanism.
The outer cylinder 13 that constitutes the lower portion of the pedestal 12 is non-rotatably fitted to and supported by the multi-leg 11. The inner cylinder 14 that constitutes the upper portion of the pedestal 12 has the upper end portion fixedly supporting the support base 2, and the lower portion is supported by the outer cylinder 13 so as to be rotatable in the horizontal direction.
The support base 2 has a built-in lift adjustment mechanism for the pedestal 12 and a reclining mechanism for the backrest 7.

FIG. 3 is a view of the chair 100 from which some parts have been removed, as viewed from the lower left front of the seat body 4.
As shown in FIG. 3, the seat receiving member 3 has a front region and a rear region on both left and right sides swingably connected to an upper portion of the support base 2 via a front arm 60f and a rear arm 60r. The front arm 60f is bent upward from the front end of the support base 2 and extends outward in the chair width direction, and the lower end side is rotatably supported on the front portion of the support base 2 about an axis extending in the chair width direction. Has been done. A lower end of the rear arm 60r is integrally coupled to a below-described forward-facing arm portion 72b of the backrest support 70, and extends outward from the chair-width direction while curving upward from the forward-facing arm portion 72b. The front end portion of the forward-facing arm portion 72b of the backrest support body 70 is connected to the shaft of the reclining mechanism near the rear portion of the support base 2. Therefore, the rear arm 60r tilts around the axis along the chair width direction according to the operation of the reclining mechanism.

The seat receiving member 3 is rotatably connected to the upper ends of the front arm 60f and the rear arm 60r. Therefore, the seat receiving member 3 constitutes a parallel link mechanism together with the front arm 60f, the rear arm 60r, and the support base 2, and is displaced in the front-rear direction in conjunction with the tilting movement of the backrest support 70. There is.

FIG. 4 is a view of the seat body 4 and the seat receiving member 3 connected to the seat body 4 as viewed from below. 5 is a diagram of the left front region of the seat receiving member 3 as viewed from the upper side of the right front portion, and FIG. 6 is a diagram showing a cross section taken along line VI-VI in FIG. 4 and 5, only the left half of the seat body 4 and the seat receiving member 3 is shown, but the seat body 4 and the seat receiving member 3 are formed substantially symmetrically.
As shown in these figures, the seat receiving member 3 has a pair of left and right side frame portions 61 and a connecting frame portion 62 that connects front regions of the left and right side frame portions 61. .. In the case of this embodiment, the left and right side frame portions 61 and the connecting frame portion 62 are formed as an integral member. The left and right side frame portions 61 are arranged so as to be parallel to each other. Guide rails 63 are provided on the upper portions of the left and right side frame portions 61 so as to support the seat body 4 slidably in the front-rear direction.

Each of the left and right side frame portions 61 is composed of a substantially rectangular block that is long in the front-rear direction. On the other hand, as shown in FIG. 5, the connecting frame portion 62 connected to the side frame portion 61 is formed in a downward arc-shaped substantially arcuate cross-sectional shape extending in the chair width direction. In other words, a concave portion 62a that is continuous in the chair width direction is formed on the upper surface side of the connection frame portion 62. As shown in FIG. 6, a lightening portion 61a that opens in a concave shape downward is provided at a position above the extension of the connecting frame portion 62 of each of the left and right side frame portions 61. An inner side wall 61b adjacent to the recessed portion 62a of the connection frame portion 62 is provided inside the lightening portion 61a of each side frame portion 61 in the chair width direction. A projecting support wall 61c is provided. Fitting holes 61b-h and 61c-h into which the pivot pins 64 are fitted are formed in the inner side wall 61b and the support wall 61c, respectively.

On the upper end of the front arm 60f described above, a connecting piece 65 that is inserted into the lightening portion 61a of the side frame portion 61 is provided in a protruding manner. The connecting piece 65 has an insertion hole 65a into which the pivot pin 64 is rotatably inserted. A slide bush 33 for rotatably supporting the pivot pin 64 is press-fitted into the insertion hole 65a. In the state where the connecting piece 65 is arranged in the lightening portion 61a of the side frame portion 61, the pivot pin 64 fitted and fixed to the inner side wall 61b and the support wall 61c is inserted, whereby the side frame portion 61 is inserted. Is rotatably connected to. In addition, reference numeral 66 in FIG. 6 is a shielding wall projecting at a position outside the chair width direction of the connecting piece 65 at the upper end of the forearm 60f. The shielding wall 66 is arranged on the chair width direction outer side of the support wall 61c, and shields the fitting portion of the support wall 61c and the pivot pin 64 from the chair width direction outer side. Since the shield wall 66 does not directly support the pivot pin 64, the wall thickness in the chair width direction is smaller than that of the inner side wall 61b and the support wall 61c.

The pivot pin 64 is formed in a non-circular outer surface shape having a width across flats, and the fitting holes 61b-h, 61c- of the inner side wall 61b into which the pivot pin 64 is fitted and the support wall 61c. The h is also formed in a non-circular shape so as to match the outer surface shape of the pivot pin 64. Reference numeral 67 in FIG. 5 and FIG. 6 is a slipping-off set screw that is screwed into the pivot pin 64 in the direction orthogonal to the axis when a part of the screw is locked to the side frame portion 61. The pivot pin 64 is restricted from rotating and coming off from the side frame portion 61 by fitting with the fitting holes 61b-h and 61c-h in a non-circular portion and cooperating with the set screw 67.

As shown in FIGS. 3 and 4, the seat body 4 includes a seat shell 40 (load supporting member) made of a hard resin that receives a seating load, a cushion member (not shown) arranged above the seat shell 40, and a cushion. It has a skin member 41 that covers the upper part of the member and the seat shell 40 and the surrounding area, and a pair of frame receiving portions 42 provided at positions spaced apart in the chair width direction on the lower surface of the seat shell 40. The left and right frame receiving portions 42 are provided at positions corresponding to the left and right side frame portions 61 of the seat receiving member 3, and extend along the front-rear direction of the seat body 4. The frame receiving portion 42 is wider than the guide rail 63 of the side frame portion 61, and is formed to be longer than the guide rail 63 in the front-rear direction. The left and right frame receiving portions 42 are configured as an integral part with the seat shell 40. However, the frame receiving portion 42 may be formed as a separate part from the seat shell 40 and fixed to the seat shell 40 by a fixing means.

The backrest support body 70 has a main part made of a metal material such as an aluminum alloy, and as shown in FIGS. 1 to 3, a pair of left and right main frames 72 spaced apart in the chair width direction and a chair width. A connecting frame 73 extending in the direction and connecting the upper end portions of the main frames 72 to each other. The left and right main frames 72 are formed in a substantially L-shape in a side view, and a standing portion 72a that stands up from a lower rear portion of the seat body 4 and a forward direction that extends forward while curving from the lower end of the standing portion 72a. And an arm portion 72b. The front end of the forward arm 72b is connected to the shaft of the reclining mechanism provided on the support base 2 as described above. Further, the upright portions 72a of the left and right main frames 72 are inclined outward in the chair width direction so that the width of separation between the upright portions 72a gradually increases toward the upper side.

The backrest main body 71 includes a resin backrest frame 75 and a tension member 76 stretched on the backrest frame 75 to directly receive an input load from the back of the seated person. As shown in FIG. 2, the backrest frame 75 is an upper portion in which the separation width of the left and right frame sides 75s is gradually narrowed downward, and the upper ends of the left and right frame sides 75s extend in the chair width direction. It is formed in an inverted triangular front view shape that is connected by the side frame side 75u. On each of the left and right frame sides 75s of the backrest frame 75, an upper connecting arm 69u protruding rearward from the upper side region and a lower connecting arm 69l protruding rearward from the lower side region extend. It is set up. The upper connection arm 69u is connected to an upper region of the upright portions 72a of the corresponding main frames 72 on the left and right of the backrest support 70, and the lower connection arm 69l corresponds to the left and right main frames of the backrest support 70. It is connected to the lower region of the upright portion 72a of 72.

7 is a view showing a cross section taken along the line VII-VII of FIG. 4, and FIG. 8 is a view of the left rear portion of the seat body 4 as seen from the lower front side.
On the lower surface of each frame receiving portion 42 provided on both the left and right sides of the lower surface of the seat body 4, a recessed portion 43 having a substantially rectangular cross section that extends substantially along the front-rear direction of the seat body 4 is formed.

The concave portion 43 includes a bottom wall 43a that is long in the front-rear direction of the seat body 4, a side wall 43s that stands downward from each end of the bottom wall 43a on the inside and outside of the chair width direction, and a front end of the bottom wall 43a. It has a front wall 43f standing downward from the section and a rear wall 43r standing downward from the rear end of the bottom wall 43a. A long guide fitting 44 (sliding member), which will be described in detail later, is accommodated in the concave portion 43. A part of the lower surface of the bottom wall 43a of the concave portion 43 constitutes a downward support surface 43a-1 that abuts the upper surface of the guide fitting 44 to support the guide fitting 44. Further, a support block 45 having a substantially rectangular parallelepiped shape that bulges toward the front is provided in a central region in the width direction of the rear wall 43r in the concave portion 43. An insertion groove 46 into which the rear end of the guide fitting 44 is inserted from the front is formed in the upper portion of the support block 45. The upper surface of the insertion groove 46 constitutes an upward support surface 46u that comes into contact with the lower surface on the rear side of the guide fitting 44 inserted into the insertion groove 46 and supports the guide fitting 44.

As will be described later in detail, the guide fitting 44 is assembled to the guide rails 63 of the left and right side frame portions 61 of the seat receiving member 3 and then the rear end thereof is inserted into the insertion groove 46, so that the lower surface thereof faces upward. It abuts on the support surface 46u, and further, the upper surfaces of the central region and the front region abut on the downward support surface 43a-1 in the concave portion 43. In this state, the guide metal fitting 44 has the rear edge portion and the front edge portion bolted to the frame receiving portion 42. The guide fitting 44 is made of a sturdy metal plate and functions to reinforce the lower side portion of the seat shell 40 of the seat body 4 when attached to the corresponding frame receiving portion 42 of the seat body 4. ..

A bolt insertion hole (reference numeral omitted) is formed at the rear edge of the guide metal fitting 44, and a fixing nut 47 is welded and fixed to the upper surface side thereof. The support block 45 is formed with an insertion hole 48 penetrating in the vertical direction, and a bolt Br for fixing the guide fitting 44 is inserted into the insertion hole 48. The bolt Br is inserted into the insertion hole 48 from the lower side of the support block 45, and is tightened in the fixing nut 47 of the guide fitting 44 in this state. The rear edge portion of the guide fitting 44 is thereby fixed to the support block 45 while being in contact with the upward support surface 46u. Further, the front edge portion of the guide fitting 44 is fastened and fixed to the bottom wall 43a in the concave portion 43 by the bolt Bf in a state of being in contact with the downward support surface 43a-1.

In addition, an escape groove 49 that is recessed to the upper side of the downward support surface 43a-1 is formed in the rear end side region inside the concave portion 43 of each frame receiving portion 42. The escape groove 49 is formed in a widthwise central region of the bottom wall 43 a in the concave portion 43 so as to have a width slightly wider than that of the support block 45. Further, the escape groove 49 is formed over a range reaching the rear wall 43r in the concave portion 43 from the front side by a predetermined distance from the support block 45. The escape groove 49 has a recessed portion of the fixing nut 47 fixed to the upper surface side of the guide fitting 44 when the rear end portion of the guide fitting 44 is inserted into the insertion groove 46 in a state where the seat body 4 is inclined rearward and downward. It avoids interfering with the bottom wall 43a side of 43. It should be noted that instead of the escape groove 49, an escape hole that penetrates the frame receiving portion 42 in the vertical direction may be used.

As shown in FIG. 7, a through hole 39 penetrating in the vertical direction is formed at a position closer to the rear side than the central portion of the guide fitting 44 in the front-rear direction. The through hole 39 is formed in a long hole shape that is long in the front-rear direction. Further, the bottom wall 43a of the concave portion 43 to which the guide metal fitting 44 is attached is provided with a locking projection 38 penetrating the through hole 39 and projecting downward. On the other hand, the upper surface of the guide rail 63 that slidably holds the guide metal member 44 is brought into contact with the locking projection 38 that projects downward from the through hole 39, so that the seat body 4 moves in the front-back direction with respect to the guide rail 63. A restriction recess 37 is formed to restrict the movement range in the (sliding direction). The seat body 4 is restricted from sliding rearward by the locking projection 38 contacting the rear wall 37r of the restriction recess 37, and the locking projection 38 contacting the front wall 37f of the restriction recess 37. The sliding movement to the front side is restricted. The locking projection 38 may be provided so as to project on the upper surface of the guide rail 63, and the restriction recess 37 may be formed on the bottom wall 43 a side of the recess 43.

FIG. 9 is a view of a part of the left frame receiving portion 42 of the seat body 4 as seen from below. FIG. 10 is a view in which a part of an assembly portion of the frame receiving portion 42 on the left side of the seat body 4 and the side frame portion 61 of the seat receiving member 3 is partially sectioned and viewed from the upper left front side. 11 is a diagram showing a cross section taken along line XI-XI of FIG. 4, and FIG. 12 is a diagram showing a cross section taken along line XII-XII of FIG.
The left and right side frame portions 61 of the seat receiving member 3 have guide rails 63 for holding the guide fittings 44 so as to be slidable back and forth, as shown in FIGS. The guide rail 63 is formed in a substantially T-shaped cross section in which the width of the lower region connected to the main body portion of the side frame portion 61 is narrower than the width of the upper region. Regarding the guide rail 63, a narrow lower region is referred to as a constricted portion 63a, and a wider upper region is referred to as a head 63b.
A thin resin member 36 having good slidability is attached to the upper surface and the left and right side surfaces of the head portion 63b of the guide rail 63. In addition, an opening (reference numeral omitted) of the same shape is formed in a portion of the resin member 36 corresponding to the above-described restriction recess 37 of the guide rail 63.

On the other hand, the guide metal fitting 44 contacts the upper wall 44u that abuts on the upper surface of the head portion 63b of the guide rail 63 via the resin member 36 and the left and right side surfaces of the head portion 63b of the guide rail 63 via the resin member 36. It has a pair of side walls 44s and a slip-off restriction wall 44a that is bent from the lower ends of the left and right side walls 44s toward the constricted portion 63a of the guide rail 63. The left and right sidewalls 44s contact the side surface of the head portion 63b of the guide rail 63 via the resin member 36 to regulate the displacement of the seat body 4 in the chair width direction. Further, the slip-off restricting wall 44 a restricts the upward displacement (upward slipping) of the seat body 4 from the guide rail 63 by contacting the lower surface of the head portion 63 b of the guide rail 63.

Further, the upper wall 44u of the guide metal fitting 44 is such that the upper surfaces of the front region and the central region contact the downward support surface 43a-1 in the concave portion 43, and the rear end region is inserted into the insertion groove 46 of the support block 45. The lower surface of the rear end region (the lower surface on the end side in the sliding direction) abuts on the upward supporting surface 46u of the support block 45. In addition, in the present embodiment, the lower surface of the rear end region of the upper wall 44u of the guide fitting 44 abuts the upward support surface 46u of the seat 4 side, but other than the upper wall 44u of the guide fitting 44. A portion, for example, a lower surface on the rear end side of the slip-off restriction wall 44a (a lower surface on the end portion side in the sliding direction) may be in contact with the upward support surface on the seat body 4 side.

By the way, between the left frame receiving portion 42 of the seat body 4 and the left side frame portion 61 of the seat receiving member 3, a slide lock for fixing the slide position of the seat body 4 with respect to the seat receiving member 3 in the front-rear direction. A mechanism 20 is provided.

An operation lever 21 (rotating operation member) having a locking claw 30a that is a positioning protrusion is rotatably attached to the left frame receiving portion 42. On the other hand, on the left side surface of the side frame portion 61 on the lower side of the guide rail 63, a plurality of locking grooves 31 as positioning recesses are arranged along the front-rear direction (along the longitudinal direction of the side frame portion 61). Has been formed.
In the present embodiment, the left frame receiving portion 42 and the side frame portion 61 (seat receiving member 3) that slidably supports the frame receiving portion 42 support the operation lever 21 so as to be rotatable. It constitutes a structure. The side frame portion 61 (seat receiving member 3) constitutes a base member in the support structure, and the frame receiving portion 42 is displaced in one direction with respect to the side frame portion 61, which is a base member, and assembled. The assembled member is configured. The frame receiving portion 42 also constitutes a slide member that is slidably assembled in one direction with respect to the side frame portion 61 that is a base member.

The lock claw 30a of the operation lever 21 is adapted to be selectively engaged with one of the lock grooves 31 on the side frame 61 side according to the front-back movement position of the seat body 4. The slide lock mechanism 20 includes a lock claw 30a and a plurality of lock grooves 31 as main components.

As shown in FIG. 9, a concave portion 50 that is recessed inward in the chair width direction is provided on the left side portion of the left frame receiving portion 42. The front wall and the rear wall in the recess 50 are provided with pivots 51 so as to face each other. The pivot 51 is provided so as to project along the sliding direction (front-rear direction) of the frame receiving portion 42.

The outer peripheral surface of the pivot 51 is not a perfect circle as shown in FIGS. 10 and 11, but is an arc portion 51a having an arc shape centered on the axis (axis o) of the pivot 51 and both ends of the arc portion 51a. And a linear portion 51b that connects the portions in a straight line, and is formed in a non-circular shape. The arc portion 51a has an arc shape with a central angle of 180° or more. Further, as shown in FIG. 9, a bracket 52 having a substantially L-shape when viewed from the bottom is provided on the bottom wall of the recess 50 so as to project therefrom. The bracket 52 has a columnar spring holding portion 52a, and the spring holding portion 52a is arranged so as to be coaxial with the pivot shaft 51.

The operation lever 21, which is a rotation operation member, is rotatably held on the pair of pivots 51 of the frame receiving portion 42. Further, the spring holding portion 52a of the bracket 52 holds an urging spring 53 (coil spring) that urges the operation lever 21 to rotate toward the initial position.

FIG. 13 is a diagram showing a schematic cross section showing the structure of the attachment portion of the operation lever 21 and the assembly procedure of the operation lever 21 in the order of (A), (B), and (C).
As shown in FIGS. 10 to 13, the operation lever 21 includes a pair of pivot holding portions 22 that rotatably hold the pivot 51, a flat-shaped gripping operation piece 23 connected to the pivot holding portion 22, and a grip. The arm portion 24 extends from a position separated from the operation end of the operation piece 23 in a direction intersecting the grip surface of the grip operation piece 23. The above-described lock claw 30a is bent at a substantially right angle and protrudes from the tip of the arm 24. In the case of this embodiment, a pair of lock claws 30a is provided.

Hereinafter, with respect to the operation lever 21, for convenience of description, the direction along the pivot 51 when held by the pivot 51 will be referred to as the width direction.
The pair of pivot holding portions 22 are installed at two positions separated in the width direction of the grip operation piece 23. Each pivot holding portion 22 is formed so as to bulge in a direction intersecting the grip surface of the grip operation piece 23. The pivot holding portion 22 allows the corresponding pivot 51 to be inserted and engaged in a direction substantially orthogonal to the axis o direction of the pivot 51, and the pivot 51 is rotatable inside (inner side) the insertion opening 25. And a holding hole 26 for holding.

The insertion opening 25 is formed such that the opening width w1 thereof is wider than the minimum diameter Dmin of the pivot 51 (diameter in a direction substantially orthogonal to the extending direction of the straight portion 51b) and narrower than the maximum diameter Dmax of the pivot 51. Has been done. Therefore, as shown in FIG. 13(A), the pivot 51 can pass through the holding hole 26 when it is inserted into the insertion opening 25 in the angular posture having the minimum diameter Dmin, but has the maximum diameter Dmax. When it is inserted into the insertion opening 25 in an angular posture, it cannot pass through the holding hole 26.
A relative rotational position range of the pivot holding portion 22 and the pivot 51 that allows the pivot 51 to pass through the insertion opening 25 is referred to as a first relative position range P1. In the present embodiment, the relative rotation range that allows the pivot 51 to pass through the insertion opening 25 is narrow, so in FIG. 13, the first relative position range P1 is shown as one position having no width. It is shown.

As will be described in detail later, the range P2 to P3 (hereinafter, referred to as “operation angle range P2 to P3”) of the relative rotational positions of the pivot holding portion 22 and the pivot 51 when the operation lever 21 is used is the first range. It is set to a relative position range separated from the relative position range P1. Therefore, when the relative rotational position of the pivot holding portion 22 and the pivot 51 is in the first relative position range P1, the operation lever 21 can attach and detach the pivot holding portion 22 to the pivot 51, but the relative rotation of the two. When the moving position is within the operation angle range P2 to P3, the attachment/detachment of the pivot holding portion 22 from the pivot 51 is restricted. In the present embodiment, the non-circular outer peripheral surface of the pivot 51 having the arc portion 51a and the straight portion 51b and the opening width w1 are narrower than the maximum diameter Dmax of the outer peripheral surface of the pivot 51 and wider than the minimum diameter Dmin. The insertion opening 25 constitutes an assembly position limiting function portion in the attachment portion of the operation lever 21.

The holding hole 26 of the pivot holding portion 22 has an arcuate surface 26a having an arcuate inner peripheral surface, and a substantially triangular cross-section that bulges from both ends in the circumferential direction of the arcuate surface 26a toward the center of the arc surface 26a. And a regulation protrusion 26b. The restriction protrusion 26b has a pair of contact surfaces 26b-1 and 26b-2 extending linearly from both ends of the arc surface 26a toward the top of the protrusion.
The central angle of the circular arc surface 26a of the holding hole 26 is set to be larger than the central angle of the circular arc portion 51a of the pivot 51 by a predetermined angle. The diameter of the arc surface 26a of the holding hole 26 is set to be substantially equal to the maximum diameter Dmax of the pivot 51 (slightly larger than the maximum diameter Dmax of the pivot 51).

When the operation lever 21 is in use when the pivot 51 is inserted into the holding hole 26 through the insertion opening 25, the restricting protrusion 26b in the holding hole 26 abuts on the straight portion 51b on the outer peripheral surface of the pivot 51. The operating angle ranges P2 to P3 are regulated. That is, in the operating lever 21, one contact surface 26b-1 of the restricting projection 26b contacts the linear position 51b of the outer peripheral surface of the pivot shaft 51, and the contact surface 26b-2 forms the outer peripheral surface of the pivot shaft 51. Is rotatable with respect to the rotation position P3 in which it comes into contact with the straight portion 51b.

Further, the operation lever 21 has a first relative position before the frame receiving portion 42 of the seat body 4 which is an assembly member (slide member) is assembled to the side frame portion 61 of the seat receiving member 3 which is a base member. In the position range P1, the frame receiving portion 42 is assembled with the pivot 51. At this time, one end of the biasing spring 53 is locked to the operating lever 21. As a result, the urging force of the urging spring 53 acts on the operation lever 21 in the direction toward the first relative position range P1.

Thereafter, when the frame receiving portion 42 is assembled to the side frame portion 61, the operation lever 21 is relatively rotated against the urging force of the urging spring 53 to a relative rotation position separated from the first relative position range P1. I will let you. When the frame receiving portion 42 is assembled to the side frame portion 61 in this manner, the lock claw 30 a of the operating lever 21 receives the biasing force of the biasing spring 53 and is fitted into one of the lock grooves 31 on the side frame portion 61. Abut in the state. At this time, the operation lever 21 is restricted from being rotationally displaced into the first relative position range P1, and is maintained in the operation angle range P2 to P3 during use.
In the present embodiment, the lock claw 30a on the operation lever 21 side and the lock groove 31 on the side frame portion 61 side prevent rotational displacement of the pivot holding portion 22 and the pivot 51 to the first relative position range P1. It constitutes a rotation restricting function part for restricting. Therefore, the lock claw 30a and the lock groove 31 configure the slide lock mechanism 20 of the seat body 4 and the rotation restricting function portion of the operation lever 21.

As described above, in the attachment portion structure of the operation lever 21 (rotation operation member) according to the present embodiment, the pivot holding portion 22 of the operation lever 21 is assembled to the pivot 51 of the frame receiving portion 42, and the frame receiving portion 42 is attached. After being assembled to the side frame portion 61 of the seat receiving member 3, the removal of the pivot shaft 51 from the insertion opening 25 is regulated by the cooperation of the assembly position limiting function portion and the rotation regulating function portion described above. Therefore, when the operation lever 21 is assembled to the frame receiving portion 42 and the side frame portion 61, which are the support structure, a large load is less likely to act on the operation lever 21 and the pivot 51. Therefore, when the mounting portion structure of the operation lever 21 according to the present embodiment is adopted, the operation lever 21 can be easily assembled to the support structure, and the workability of assembling the operation lever 21 is improved. To do.

Further, in the mounting structure of the operation lever 21 according to the present embodiment, the assembly position limiting function part of the operation lever 21 includes the non-circular outer peripheral surface of the pivot 51 having the arc portion 51a and the straight portion 51b, and the pivot 51. And the insertion opening 25 of the pivot holding portion 22 having an opening width w1 narrower than the maximum diameter Dmax of the outer peripheral surface of the circular arc portion 51a and wider than the minimum diameter Dmin of the pivot. The pivot shaft 51 and the insertion opening 25 are arranged in an angular posture in which the pivot shaft 51 has the minimum diameter Dmin when the relative rotational position of the pivot shaft holding portion 22 and the pivot shaft 51 is in the first relative position range P1. Is formed to be inserted into. Therefore, when the operation lever 21 is assembled into the holding hole 26 of the frame receiving portion 42, the relative rotational positions of the pivot shaft holding portion 22 of the operation lever 21 and the pivot shaft 51 are adjusted so as to fall within the first relative position range P1. In this state, the pivot 51 can be inserted into the insertion opening 25 of the pivot holder 22 from a direction substantially orthogonal to the axis o direction of the pivot 51. Further, when the relative rotational positions of the pivot shaft holding portion 22 and the pivot shaft 51 are displaced from this state to the operating angle range P2 to P3 during use, the width of the pivot shaft 51 facing the insertion opening 25 becomes larger than the minimum diameter Dmin. The removal of the pivot 51 from the insertion opening 25 is restricted. Therefore, when the mounting portion structure of the operation lever 21 according to the present embodiment is adopted, the assembly position limiting function portion can be configured with a simple structure having a small number of parts.

In addition, in the attachment portion structure of the operation lever 21 according to the present embodiment, the pivot holding portion 22 can abut the arc surface 26a that slidably holds the arc portion 51a of the pivot 51 and the straight portion 51b of the pivot 51. A pair of abutting surfaces 26b-1 and 26b-2, which are inside the holding hole 26, and one of the abutting surfaces 26b-1 and 26b-2 abuts on the linear portion 51b of the pivot 51. The operation angle range P2 to P3 when the operation lever 21 is used is restricted. Therefore, when the mounting portion structure of the operation lever 21 according to the present embodiment is adopted, the operation angle range P2 to P3 when the operation lever 21 is used can be restricted by a simple configuration with a small number of parts. ..

Further, in the attachment portion structure of the operation lever 21 according to the present embodiment, the portion (lock claw 30a) on the operation lever 21 side and the portion (side) on the support structure side when the pivot 51 is assembled to the pivot holding portion 22. When the lock groove 31) of the partial frame portion 61 abuts, the pivotal displacement of the pivot holding portion 22 and the pivot 51 to the first relative position range P1 is restricted. Therefore, when the mounting portion structure of the operation lever 21 according to the present embodiment is adopted, the rotation restricting function portion of the operation lever 21 can be configured with a simple structure.

In addition, in the case of the mounting structure of the operation lever 21 according to the present embodiment, the support structure that rotatably supports the operation lever 21 has the side frame portion 61, which is the base member, and the side frame portion 61. And a frame receiving portion 42 that is an assembly member that is relatively displaced in the front-rear direction and is assembled. When the frame receiving portion 42 is assembled to the side frame portion 61, a portion (lock) of the operation lever 21 side is provided. The claw 30a) and the portion on the support structure side (the lock groove 31 of the side frame portion 61) come into contact with each other, and the pivotal displacement of the pivot holding portion 22 and the pivot 51 to the first relative position range P2 to P3 is restricted. It has become so.
Therefore, when the operating lever 21 is attached to the support structure, the pivot holding portion 22 of the operating lever 21 is assembled to the pivot 51 of the frame receiving portion 42 in the first relative position range P1, and in that state, the operating lever 21 is mounted. The frame receiving portion 42 can be assembled to the side frame portion 61 by rotating in the operation angle range P2 to P3 direction during use. When the operation lever 21 is displaced in the direction of the first relative position range P1 after this assembly, the operation lever 21 side portion (lock claw 30a) and the support structure side portion (lock groove of the side frame portion 61). 31) abuts against each other, so that the rotational displacement of the pivot holding portion 22 and the pivot 51 into the first relative position range P1 is restricted. Therefore, when the mounting structure of the operation lever 21 according to the present embodiment is adopted, the pivot holding portion 22 and the pivot 51 can be pivoted to the first relative position range P1 with a simple configuration that is easy to assemble. Displacement can be regulated.

Further, in particular, in the attachment portion structure of the operation lever 21 according to the present embodiment, the frame receiving portion 42 forming the assembly member of the support structure is attached to the front and rear of the side frame portion 61 forming the base member of the support structure. A plurality of lock grooves 31 are slidably assembled in the side frame portion 61 along the front-rear direction, and a lock claw 30a that is selectively engaged with any of the lock grooves 31 is formed on the operation lever 21. Has been done. The lock claw 30a of the operation lever 21 and the lock groove 31 of the side frame portion 61 constitute the slide lock mechanism 20 of the seat body 4 and the rotation restricting function part of the operation lever 21. .. Therefore, when the mounting portion structure of the operation lever 21 according to the present embodiment is adopted, the number of parts can be reduced, the configuration can be simplified, and the manufacturing cost can be reduced accordingly.

FIG. 14 is a cross-sectional view schematically showing the structure of the attachment portion of the operation lever 121 according to another embodiment and the attachment procedure of the operation lever 121 in the order of (A) and (B). In addition, in each embodiment, the same reference numerals are given to common portions.
In the above embodiment shown in FIGS. 1 to 13, the outer peripheral surface of the pivot 51 is formed in a non-circular shape, the opening width w1 of the insertion opening 25 of the pivot holding portion 22 is wider than the minimum diameter Dmin of the pivot 51, and , The outer diameter of the pivot 151 is formed in a circular shape, and the insertion opening 25 of the pivot holding portion 22 of the operating lever 121 is formed in the other embodiment shown in FIG. The opening width w1 is formed to have substantially the same width as the diameter D of the pivot 151 (a width slightly smaller than the diameter D of the pivot 151).

In the attachment portion structure of the operation lever 121 according to another embodiment shown in FIG. 14, the assembly position limiting function portion of the operation lever 121 is configured by a locking block 116 integrally locked to the support structure, The rotation restricting function part of the lever 121 is configured by a rotation restricting pin 117 fixed to the support structure after the operation lever 121 is assembled.

The locking block 116 has a flat contact surface 116a that can contact the upper portion of the mounting portion of the pivot holding portion 22 of the operation lever 121, and the contact surface 116a prevents the pivot holding portion 22 from being displaced upward. It is regulated. The insertion opening 25 of the pivot holding portion 22 is set to be substantially parallel to the contact surface 116a when the relative rotational position of the pivot holding portion 22 and the pivot 51 is in the first relative position range P1. .. Therefore, when the relative rotational position of the pivot holding portion 22 and the pivot 51 is in the first relative position range P1, the pivot holding portion 22 is set along the contact surface 116a as shown in FIG. 14(A). By displacing, the pivot 51 can be attached to the insertion opening 25. On the other hand, as shown in FIG. 14B, when the relative rotational positions of the pivot holding portion 22 and the pivot 51 are displaced within the operating angle range P2 to P3 during use, the insertion opening 25 contacts the contact surface 116a. As a result, the contact surface 116a restricts the removal of the pivot holding portion 22 from the pivot 51.

As shown in FIG. 14B, after the operation lever 121 is assembled to the pivot 151, the rotation restricting pin 117 changes the relative pivot position of the pivot holding portion 22 and the pivot 51 to the operation angle range P2 to P3. Then, in that state, it is locked and fixed to the support structure. As a result, the rotational displacement of the operating lever 121 within the first relative position range P1 is regulated by the rotational regulation pin 117.

The attachment portion structure of the operation lever 121 according to the present embodiment is different from the above-described embodiment in the specific configurations of the assembly position limiting function portion and the rotation limiting function portion, but the basic functions are substantially the same, It is possible to obtain the same basic effect as that of the above-described embodiment.

FIG. 15 is a cross-sectional view schematically showing the structure of the mounting portion of the operation lever 121 according to another embodiment.
The mounting structure of the operation lever 121 according to the present embodiment differs from the other embodiments shown in FIG. 14 only in the shape of the outer peripheral surface of the pivot 251. The outer peripheral surface of the pivot 251 of the present embodiment is not circular, but is formed in a polygonal shape in which all distances from the axis o to the top are equal. Also in this case, since the pivot holding portion 22 can rotate around the polygonal pivot 251 in the same manner, it is possible to obtain substantially the same operation and effect as those of the other embodiments described above.

The present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the scope of the invention. For example, in each of the above-described embodiments, the pivot 51 is provided on the support structure (frame receiving portion 42) side, and the pivot holding portion 22 is provided on the rotation operation member (operation lever 21) side. Conversely, the pivot may be provided on the rotation operation member side and the pivot holding portion may be provided on the support structure side.
Further, the seat body 4 of the above-described embodiment has a structure in which the cushion material is arranged above the seat shell 40, and the cushion material and the peripheral region of the seat shell 40 are covered with the skin member 41. May have a structure in which a mesh-shaped tension material is stretched over the seat frame.
Further, in the above-described embodiment, the operation lever 21 for locking and unlocking the front and rear positions of the seat 4 of the chair constitutes the rotation operation member, but the rotation operation member according to the present invention is not limited to this. The present invention is not limited to this, and may be, for example, an operation lever for adjusting the vertical height of a chair or a table.

21,121 Operation lever (rotation operation member)
22 Axis Holding Part 25 Insertion Opening 26a Arc Surface 26b-1, 26b-2 Abutting Surface 30a Lock Claw (Positioning Protrusion)
31 Lock groove (positioning recess)
42 Frame receiving part (assembly member, slide member, support structure)
51, 151, 251 Axis 51a Arc part 51b Straight part 61 Side frame part (base member, support structure)
63 Guide rails 100 Chairs (furniture)
116 Locking block (assembly position restriction function part)
117 Rotation Restriction Pin (Rotation Restriction Function Section)
P1 First relative position range w1 Opening width

Claims (7)

A support structure and a pivot provided on one of the rotation operation members pivotally supported on the support structure;
An insertion opening is provided in the other of the support structure and the rotation operation member, which holds the pivot in a rotatable manner and allows the pivot to be inserted and engaged in a direction substantially orthogonal to the axial direction of the pivot. A pivot holding portion,
And a slip-off restricting means for restricting slip-out of the pivot shaft from the pivot shaft holding portion through the insertion opening,
The removal restriction means is
When the relative rotational position of the pivot holding portion and the pivot is in the first relative position range separated from the operating angle range when the rotary operation member is in use, the insertion and removal of the pivot with respect to the insertion opening are performed. An assembly position limiting function for allowing insertion and withdrawal of the pivot shaft with respect to the insertion opening when the relative rotation position of the pivot holding portion and the pivot shaft is in a position range outside the first relative position range. Department,
When the relative rotational position of the pivot holding portion and the pivot is displaced within the operating angle range during use, a rotation that restricts rotational displacement of the pivot holding portion and the pivot into the first relative position range is performed. Motion restriction function section,
A mounting structure for a rotary operation member, comprising: The assembly position limiting function unit,
A non-circular outer peripheral surface of the pivot having an arc portion having an arc shape centered on the axis of the pivot, and a straight portion linearly connecting both ends of the arc portion,
The insertion opening formed with an opening width narrower than a maximum diameter of an outer peripheral surface of the arc portion of the pivot and wider than a minimum diameter of an outer peripheral surface of the pivot including the linear portion,
The pivot shaft and the insertion opening are inserted into the insertion opening in an angular posture in which the pivot shaft has the minimum diameter when the relative rotational positions of the pivot shaft holding portion and the pivot shaft are in the first relative position range. The mounting portion structure of the rotation operating member according to claim 1, wherein the mounting portion structure is formed as follows. The pivot holding portion has an arc surface that slidably holds the arc portion of the pivot, and a contact surface that can abut the straight portion of the pivot, inside the insertion opening,
The mounting portion for a rotary operation member according to claim 2, wherein the contact surface restricts an operating angle range of the rotary operation member when the rotary operation member is in use by contacting the linear portion of the pivot. Construction. The rotation restricting function section,
In a state where the pivot shaft is assembled to the pivot holding portion, the pivot operation member side portion and the support structure side portion contact each other to bring the pivot holding portion and the pivot shaft into the first relative position range. The rotational displacement of the rotary operation member is controlled according to any one of claims 1 to 3. The support structure is
A base member,
An assembly member which is displaced in one direction with respect to the base member and assembled,
The rotation operation member is assembled to the assembly member so that the axis extends along the one direction,
When the assembly member is assembled to the base member, the pivot operation member side portion and the base member side portion come into contact with each other, so that the pivot shaft holding portion and the pivot shaft are opposed to each other. The mounting portion structure of the rotation operating member according to claim 4, wherein the rotation displacement to the position range is restricted. The base member has a plurality of positioning recesses arranged along one direction,
The assembling member is a slide member that is slidably attached to the base member in the one direction,
The rotation operation member is rotatably assembled to the slide member, and has a positioning protrusion that is selectively engaged with one of the positioning recesses of the base member,
6. The rotation according to claim 5, wherein the positioning protrusion and the positioning recess constitute a slide lock mechanism that fixes the slide position of the slide member with respect to the base member and the rotation restricting function unit. The structure of the mounting part of the dynamic operation member. A fixture comprising the mounting structure for a rotary operation member according to claim 1.

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