JP7264654B2 - Retraction movement device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an advancing/retreating device including a case and an advancing/retreating member that can advance/retreat with respect to the case.

In vehicles such as automobiles, the opening and closing device for the fuel lid that covers the fuel supply port uses a retraction movement device that moves the retraction member between a pushed position that closes the fuel lid and a protruding position that opens the fuel lid (for example, patent Reference 1).
In the advance/retreat device of Patent Literature 1, a shaft-shaped push rod as an advance/retreat member is moved forward and backward in the axial direction to open and close a fuel lid attached to a vehicle body via a hinge.
When the push rod advances and retreats between the pushed-in position and the protruded position, the protrusions on the apparatus main body side slide in the spiral grooves on the outer periphery of the push rod, so that the push rod rotates about the axis of the push rod while advancing and retreating. rotate in the direction

A lid engaging portion is provided at the tip of the push rod, and a lid engaged portion is provided at a corresponding portion of the fuel lid. When the push rod is in the pushed position, the lid engaging portion is engaged with the lid engaged portion of the fuel lid, and the fuel lid is closed. In addition, in the process of moving the push rod to the projecting position, the push rod and the lid engaging portion rotate, so that the engagement between the lid engaging portion and the lid engaged portion of the fuel lid is released, and the push rod moves to the projecting position. , the fuel lid is open.
When the fuel lid is to be closed from the open state, the fuel lid is moved in the closing direction, and the push rod in the projecting position is pressed to move in the backward direction via the fuel lid. By being pressed from the fuel lid side, the retractable member rotates in the direction opposite to when it moves from the pushed position to the projected position while sliding between the spiral groove and the protrusion, and moves to the pushed position.
In addition, the opening/closing device of Patent Document 1 is provided with a locking mechanism that locks forward/backward movement of the push rod. When the push rod is positioned at the pushed position, the locking mechanism causes the motor to lock the lid locking member to the push rod, thereby restricting the push rod from advancing or retreating. Since the locking mechanism is locked, even if the fuel lid is operated, the push rod does not advance or retreat, and the fuel lid does not open.

JP 2014-173422 A

However, in the conventional opening and closing device for opening and closing the fuel lid, the fuel lid is opened and closed by moving forward and backward while rotating the push rod. When receiving an external force in one direction so as to move in one direction, the advance/retreat member moves to the retracted position, and there is a problem that the locking mechanism automatically locks the member.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an advance/retreat device for advancing/retreating an advance/retreat member, in which even if the advance/retreat member at the advanced position receives a unidirectional external force that causes the advance/retreat member to move in the reverse direction due to a mischievous operation or the like, movement in the backward direction can be prevented. An object of the present invention is to provide a forward/backward moving device.

An advance/retreat device according to one aspect of the present invention includes:
a case;
a retractable member that can move forward and backward with respect to the case;
a biasing member that biases the advance/retreat member from the retracted retracted position side toward the advanced forward position side with respect to the case;
an engaged portion provided on one of the case and the retractable member;
an engaging portion provided on the other of the case and the retractable member;
has
The engaged portion is spirally provided in a direction around the axis of the retractable member,
The engaging portion slides on the engaged portion by restricting relative axial movement of the advance/retreat member due to engagement with the engaged portion,
The advancing/retreating member is provided so as to move relative to the axial direction of the advancing/retreating member while rotating relative to the case by sliding between the engaged portion and the engaging portion,
The biasing member biases the advance/retreat member in one rotation direction when the advance/retreat member advances,
The engaged portion is
a non-helical inhibition portion provided on the advancing/retreating member, extending in the circumferential direction, and continuing to the spiral portion of the engaged portion on the rear end side of the advancing/retreating member;
The inhibiting portion abuts against the engaging portion when the advancing/retreating member in the advanced position is pushed in a backward direction without sliding between the engaging portion and the engaged portion. A configuration is adopted that inhibits the member from retreating.

According to the present invention, even if the advance/retreat member at the forward position receives an external force in one direction that causes the advance/retreat member to move in the backward direction due to a mischievous operation or the like, it is possible to prevent the backward movement.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a configuration in which a forward/backward movement device according to an embodiment of the present invention is applied to a fuel lid opening/closing device; It is a figure explaining the relationship between the lid latching|locking part of an advance-and-retreat member, and the lid latched part of a fuel lid. 1 is a plan view showing an internal configuration of an advance/retreat device according to an embodiment of the present invention; FIG. Fig. 2 is a right side view showing the advance/retreat device according to the embodiment of the present invention; FIG. 5 is a cross-sectional view taken along line BB of FIG. 4; 6 is an enlarged view of part C of FIG. 5; FIG. 1 is a schematic side view schematically showing the positional relationship of components of a fuel lid opening/closing device to which a forward/backward moving device according to an embodiment of the present invention is applied; FIG. 1 is a schematic front view schematically showing the positional relationship of components of a fuel lid opening/closing device to which a forward/backward moving device according to an embodiment of the present invention is applied; FIG. It is a perspective view of an advance/retreat member. It is a perspective view of an advance/retreat side member.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The advance/retreat device of this embodiment moves the advance/retreat member forward/backward with respect to the case. In the present embodiment, a fuel lid opening/closing device is given as an application example, but the advancing/retreating device of the present embodiment may be applied to a device other than the fuel lid opening/closing device.

[Opening and closing device 100 to which advance/retreat device 1 is applied]
As shown in FIG. 1, an opening/closing device 100 is a device for opening and closing a cover of an opening in which a fuel filler port of a vehicle is accommodated. there is The opening/closing device 100 is a so-called fuel inlet box, and is a device installed in the fuel filler opening 2a of the vehicle body 2 for injecting fuel into the fuel tank of the vehicle.

The opening/closing device 100 includes a box body 110 attached to the fuel supply opening 2a of the vehicle body 2, a fuel lid 120 that closes the fuel supply opening 2a, a hinge 130 that rotatably supports the fuel lid 120, and the forward/backward movement device 1. have.

The box main body 110 is attached to the fuel filler opening 2a and constitutes a fuel filler chamber surrounding the fuel filler pipe on the fuel filler port side. The box body 110 shown in FIG. 1 is formed in a cylindrical shape, and one opening 112 of two openings (only one opening 112 is shown in FIG. 1) is continuously attached to the oil supply opening 2a, and the other opening (not shown) is attached. One end of an oil supply pipe (not shown) is inserted into one of the openings. One end of the oil supply pipe is arranged to protrude into the box body 110 and has an oil supply port. The fuel filler port is closed by a screw cap 160, as shown in FIG. The screw cap 160 is removable when refueling.

As shown in FIGS. 1 to 10, the advancing/retreating device 1 has an advancing/retreating member 11 and a lid locking portion 12 provided at the tip of the advancing/retreating member 11. When the advancing/retreating member 11 advances and retreats, the fuel lid 120 to open and close the 2A and 2B are diagrams for explaining the relationship between the lid locking portion 12 of the retractable member 11 and the lid locked portion 140 of the fuel lid 120. FIG. 2B is a cross-sectional view showing the lid engaged portion 140 cut along line LL in FIG. 2A. FIG. 2B, for convenience, the angle of the lid locking portion 12 is shown at such an angle that it can be inserted into the hole of the lid locked portion 140. As shown in FIG. In order to illustrate the internal configuration of the advance/retreat device 1 shown in FIG. 3, the illustration of the flat cover is omitted for the sake of convenience.

The fuel lid 120 is provided with a lid locked portion 140 that can be locked by the lid locking portion 12 of the retractable member 11 (see FIGS. 1 and 2). The lid locked portion 140 is, for example, a hole having an opening through which the lid locking portion 12 can pass when the lid locking portion 12 is at a predetermined angular position. In the present embodiment, the predetermined angular position is the position when the advancing/retreating member 11 is positioned at the advanced position. On the ceiling of the hole, which is the lid engaged portion 140 , an axis of the lid engaging portion 12 in a substantially horizontal state is provided in the hole of the lid engaged portion 140 so as to abut on the tip portion of the lid engaging portion 12 . A rotation assisting portion 142 is provided to assist rotation around the center.

As a result, when the lid locking portion 12 inserted into the opening of the lid locked portion 140 presses against the ceiling in the hole, the lid locking portion 12 comes into contact with the rotation assisting portion 142 and the lid locked portion 140 is engaged. Rotation in the engagement direction with the stop portion 140 is facilitated. For example, when the lid locking portion 12 is positioned at a predetermined angle and is positioned so as to be insertable into the opening of the lid locked portion 140 , the rotation assisting portion 142 is attached to the lid locking portion 12 . When pressed, the lid locking portion 12 is guided to rotate about its axis by the rotation assisting portion 142, and rotates about its axis (for example, in the direction of arrow R) in a substantially horizontal state. By this rotation, an engaging portion 46, which will be described later, can be slid along the inhibition portion 15. As shown in FIG. The rotation assisting portion 142 may be, for example, a projection or a tapered surface.

In addition, the lid engaging portion 12 is pushed backward against the ceiling surface in the lid engaged portion 140 of the fuel lid 120 to rotate the lid engaging portion 12 to the engagement position with the lid engaged portion 140. You may have a guide wall part to guide.

[Operation of Switching Device 100 to which Retraction Moving Device 1 is Applied]
According to such an opening/closing device 100 , when the fuel lid 120 is closed, the fuel lid 120 pushes the retractable member 11 toward the inside of the case 4 , thereby retracting the retractable member 11 toward the inside of the vehicle body 2 . When the fuel lid 120 is closed and comes into contact with the lid locking portion 12 of the retractable member 11, the lid locking portion 12 is at a predetermined angular position (see the lid locking portion 12 indicated by the phantom line in FIG. 2). It passes through the opening of the lid engaged portion 140 and enters the inside of the lid engaged portion 140 . Furthermore, when the advance/retreat member 11 moves backward, the lid locking portion 12 positioned inside the lid locked portion 140 rotates and changes its angle (see the lid locking portion 12 indicated by the solid line in FIG. 2). ), the lid engaging portion 12 is engaged with the inner surface of the lid engaged portion 140 . When the lid engaging portion 12 is engaged with the lid engaged portion 140, the advance/retreat member 11 is positioned at the retracted position, and the advance/retreat movement thereof is restricted by the restricting member 90, which will be described later. This locks the fuel lid 120 in the closed state.

In the advancing/retreating device 1 of the present embodiment, the advancing/retreating member 11 does not move to the retreating position when simply pushed toward the inside of the vehicle, that is, toward the retreating position inside the advancing/retreating device 1 .

When the restriction mechanism 30 is unlocked with the fuel lid 120 closing the fuel supply opening 2 a , a biasing force acts on the advance/retreat member 11 to advance the advance/retreat member 11 outward from the vehicle body 2 . At this time, the lid locking portion 12 of the advancing/retracting member 11 rotates to a predetermined angular position, so that the locking between the lid locking portion 12 and the lid locked portion 140 is released. This causes the fuel lid 120 to open.

[Overall Configuration of Advance/Retreat Device 1]
As shown in FIGS. 3 to 5, the advancing/retreating device 1 includes a case 4, an advancing/retreating member 11, a limiting mechanism 30, a biasing member 27, an engaged portion 14, and an engaging portion 46. have.

The advance/retreat movement device 1 advances and retreats the advancing/retreating member 11 with respect to the case 4 to position the fuel lid 120 at an advanced position in which the fuel lid 120 is opened and a retracted position in which the fuel lid 120 is closed. In the advance/retreat device 1, when the advance/retreat member 11 that advances and retreats with respect to the case 4 is in the retreat position, the limit member 90 of the limit mechanism 30 locks the advance/retreat member 11 to restrict the advance/retreat movement.

[Case 4]
As shown in FIGS. 3 and 5, the case 4 has a plurality of holding portions that hold each component of the advance/retreat member 11, the limiting mechanism 30, the biasing member 27, and the engaging portion 46 in a positional relationship to be described later. are doing. Here, the case 4 has an opening covered with a flat side cover (not shown). Each part assembled inside the case 4, such as the retractable member 11, is accommodated inside the case 4 through this opening. After the necessary components are housed inside the case 4 and assembled, the opening is covered with a cover (not shown). Necessary components are the retractable member side member 21, the biasing member 27, the driving portion 60, the rotating gear 74, the restricting member 90, and the like.

As shown in FIGS. 3 and 5, on one surface of the case 4, which is a front side wall portion 40 in this embodiment, the retractable member 11 can be moved forward to the outside of the case 4 and retracted to the inside of the case 4. A through hole 43 through which a part of the advancing/retreating member 11 passes is provided as possible.

In the case 4, each component of the limiting mechanism 30 such as the advancing/retreating member 11 and the limiting member 90 is formed by the wall-shaped portion and the uneven portion erected on the bottom portion and the opening covered with the cover (not shown) as the upper portion. is formed. The lead-out hole 48 is a hole for leading out wiring (not shown) connected to the terminal 66 . The terminal 66 is connected to the drive unit 60 and supplies power to the drive unit 60 from the outside of the advance/retreat device 1 .

As shown in FIG. 3 , the retractable member holding portion 41 retains the retractable member 11 so as to be movable in a predetermined direction within the case 4 . The retractable member holding portion 41 is arranged along the bottom portion of the case 4 in the present embodiment. The advancing/retreating member holding portion 41 holds the advancing/retreating member 11 so as to be able to advance and retreat outside the case 4 via the through hole 43 of the front side wall portion 40 .

The retractable member-side member holding portion 42 slidably retains a portion of the retractable member-side member 21 .
The retractable member-side member holding portion 42 is arranged in the case 4 at a position facing the retractable member holding portion 41 .
The advancing/retreating member-side member holding portion 42 forms an advancing/retreating space for the advancing/retreating member 11 and the advancing/retreating member-side member 21 in the case 4 together with the advancing/retreating member holding portion 41 and the spring accommodating portion 52 . The retractable member-side member holding portion 42 has a contact surface that abuts on the outer peripheral surface of the retractable member-side member 21 and suppresses the rotation of the retractable member-side member 21 in the direction around the axis of the retractable member 11 . This contact surface slides on the outer peripheral surface when the retractable member side member 21 slides.

The drive section main body holding section 45 holds the drive section main body 62 of the drive section 60 with the drive shaft 64 directed in a direction perpendicular to the advancing/retreating direction of the advancing/retreating member 11 .
The drive unit main body holding portion 45 is adjacent to the limiting member holding portion 50 in a direction perpendicular to the advancing/retreating direction of the advancing/retreating member 11 with respect to the limiting member holding portion 50 (that is, the width direction) and on the side opposite to the advancing/retreating member 11 . is provided.

The limiting member holding portion 50 holds the transmission member 70 and also holds the limiting member 90 in a slidable manner.
In the present embodiment, the restricting member holding portion 50 is arranged adjacent to both the advancing/retracting member side member holding portion 42 and the driving portion main body holding portion 45 .
The limiting member holding portion 50 rotatably holds the drive shaft 64 and a rotary gear 74 meshing with the gear of the drive shaft 64 , and slidably supports the limiting member 90 as the rotary gear 74 rotates.

The spring housing portion 52 houses the biasing member 27 . The spring accommodating portion 52 is arranged continuously on the retracted position side of the retractable member holding portion 41 in the case 4 . The biasing member 27 is arranged so as to be positioned along the advancing/retreating direction of the advancing/retreating member 11 . The biasing member 27 is partially inserted into the advancing/retreating member 11 through an opening provided at the rear end of the advancing/retreating member 11 so that the end is connected to a spring seat provided inside the advancing/retreating member 11 . , may be arranged in the spring housing portion 52 . Further, in the present embodiment, the rear end side of the retracted advancing/retreating member 11 is accommodated in the spring accommodating portion 52 .

As a result, the advancing/retreating member 11 and the advancing/retreating member-side member 21 provided on the advancing/retreating member 11 side are attached to the case 4 by the advancing/retreating member 11, the advancing/retreating member-side member holding portion 42, the cover of the plane and the bottom surface of the case 4, and the like. It can be moved without rattling. Further, the movement of the retractable member side member 21 can be restricted at a predetermined position by the restricting member 90 held by the restricting member holding portion 50 .

Further, in the present embodiment, the retractable member-side member holding portion 42, the restricting member holding portion 50, and the drive portion main body holding portion 45 are arranged in the direction in which the retractable member holding portion 41 and the spring accommodating portion 52 are arranged (that is, the direction in which the retractable member 11 is arranged). direction).

The lead-out hole 48 is arranged adjacent to the driving section main body holding portion 45 and the limiting member holding portion 50 on the opposite side of the advancing/retracting member side member holding portion 42 with respect to the limiting member holding portion 50 . The lead-out hole 48 has a length extending in a direction including the advancing/retreating direction as a directional component. In the present embodiment, the lead-out hole 48 is provided so as to extend substantially parallel to the advancing/retreating direction, and guides and leads out the wiring connected to the terminal 66 parallel to the advancing/retreating direction.

As described above, in the case 4, the advancing/retreating member side member holding portion 42, the driving portion main body holding portion 45, the spring accommodating portion 52, and the limiting member holding portion 50 are arranged adjacent to each other on a plane including the advancing/retreating direction. there is Further, in the present embodiment, the lead-out hole 48 is arranged adjacent to the limiting member holding portion 50 on the opposite side of the limiting member holding portion 50 from the spring accommodating portion 52 . Due to the adjoining relationship of the advancing/retracting member-side member holding portion 42, the drive portion main body holding portion 45, the restricting member holding portion 50, and the spring accommodating portion 52, the case 4 can be made longer and thinner in the width direction than in the vertical direction. there is

Further, the case 4 has an engaging portion 46 that engages with the engaged portion 14 provided on the retractable member 11 .

By engaging with the engaged portion 14 , the engaging portion 46 restricts axial relative movement of the advancing/retreating member 11 with respect to the case 4 , thereby sliding on the engaged portion 14 .

In the present embodiment, the engaging portion 46 is a projection projecting from the case 4 side toward the center of the retractable member 11 . The engaged portion 14 is a helical groove extending in a direction around the axis of the retractable member 11 . The engaging portion 46 may be provided on the retractable member 11 , and in this case, the engaged portion 14 is provided on the case 4 .

[Retractable member 11]
The advancing/retracting member 11 is a member that can advance/retreat with respect to the case 4 . The advancing/retreating member 11 is provided so as to move relative to the axial direction of the advancing/retreating member 11 while rotating relative to the case 4 by sliding the engaged portion 14 and the engaging portion 46 .

The advancing/retracting member 11 moves between an advanced position advanced with respect to the case 4 and a retreated position retreated with respect to the case 4 . Moving forward means moving toward the outside of the case 4 , and moving backward means moving toward the inside of the case 4 . Further, the forward position is the stop position (see FIG. 3) of the advancing/retreating member 11 that has advanced, and the retracted position is the stopping position of the retracted advancing/retreating member 11 .

Therefore, for example, as in the present embodiment, if both the forward position and the retracted position are outside the case 4, at the forward position, a specific portion of the retractable member 11, for example, the tip of the retractable member 11, is larger than that at the retracted position. is moving away from Case 4.

In the opening/closing device 100 (see FIG. 1), the forward position is a position where the lid locking portion 12 and the lid locked portion 140 of the fuel lid 120 are in the unlocked state, and the fuel lid 120 is in the open state. In the opening/closing device 100, the retracted position is a position where the lid locking portion 12 and the lid locked portion 140 of the fuel lid 120 are locked and the fuel lid 120 is held in the closed state. This state is a position where the advancing/retreating member 11 is locked from advancing/retreating by the restricting member 90 .

As a modification, both the forward and backward positions may be inside the case 4 . In that case, a specific portion of the retractable member 11, for example, the tip of the retractable member 11, is closer to the outside of the case 4 than in the retracted position. Also, the forward position may be outside the case 4 and the retracted position may be inside the case 4 . In that case, a specific portion of the retractable member 11 , for example, the tip of the retractable member 11 appears and disappears from the case 4 .

The advance/retreat member 11 is provided on the case 4 so as to move forward and backward while rotating relative to the case 4 .

In this embodiment, the retractable member 11 has a columnar or cylindrical rod portion and a lid locking portion 12 provided at the tip of the rod portion. In this embodiment, the retractable member 11 is arranged such that the axial direction of the retractable member 11 coincides with the retracting direction (advancing direction and retracting direction) of the retracting member 11 . As shown in FIGS. 3, 5, 7 and 9, the rod portion is provided with an annular groove 13 in part in the axial direction. The annular groove 13 is an example of a fitted portion into which an advancing/retracting member side member 21 (to be described later) is fitted so as to be relatively rotatable. In this embodiment, the annular groove 13 is provided in the central portion of the rod portion, and the engaged portion 14, which is a spiral groove, is provided on the rear end side of the annular groove 13 in the rod portion. The annular groove 13 is provided on the outer periphery of the rod portion so as to be perpendicular to the axis of the retractable member 11 . The annular groove 13, which is the fitted portion, is provided so that the restriction by the restricting member 90 is not hindered by the displacement of the retractable member side member 21 when the retractable member 11 rotates in the direction around the axis.

The advancing/retracting member 11 is inserted through the through hole 43 of the front side wall portion 40 and is slidably held by the advancing/retracting member holding portion 41 of the case 4 so as to be perpendicular to the extending direction of the front side wall portion 40 . . Note that the advancing/retreating member holding portion 41 is provided with a wall surface (a wall surface on the bottom side of the case 4 in the present embodiment) that holds the advancing/retreating member 11, and this wall surface engages with the advancing/retreating member 11 so as to be slidable. A projection as the portion 46 is provided.

The advancing/retreating member 11 is arranged such that the engaging portion 46 on the wall surface on the bottom side of the case 4 is inserted into the spiral groove that is the engaged portion 14 . The bottom side of the case 4 corresponds to the side opposite to the side to which the front cover is attached in the case 4 (see FIG. 5). In addition, movement of the advancing/retreating member 11 in the direction orthogonal to the axial direction is restricted by the advancing/retreating member side member 21 (see FIG. 10), the front side cover, and the wall surface of the case 4, and the projection, which is the engaging portion 46, is covered. Detachment from the spiral groove that is the engaging portion 14 is suppressed.

As a result, when the advancing/retreating member 11 moves in the advancing/retreating direction, the position of the engaged portion 14 in the circumferential direction is restrained by the engaging portion 46, and the advancing/retreating member 11 rotates around the axis. That is, the advance/retreat member 11 advances/retreats while rotating about the axis as an example of moving forward/backward while rotating relative to the case 4 .

The engaged portion 14 of the advancing/retracting member 11 has an inhibiting portion 15 .
When the advancing/retreating member 11 is pushed in the backward direction without causing the engaging portion 46 and the engaged portion 14 to slide, the inhibiting portion 15 abuts against the engaging portion 46 to prevent the advancing/retreating member 11 from retreating. impede.

Specifically, the inhibition portion 15 has an inhibition surface 16 extending in a direction intersecting the axial direction provided continuously on the rear end side of the spiral groove of the engaged portion 14 .

The inhibition surface 16 inhibits the engaging portion 46 from moving in the axial direction, and releases the inhibition of the engaging portion 46 when the advancing/retreating member 11 rotates and the inhibiting portion 15 moves in the circumferential direction. The mating portion 46 is guided to the spiral groove portion of the engaged portion 14 .

The inhibiting portion 15 has an engaging surface that faces the rear end side of the retractable member 11 and engages with the engaging portion 46 . In the present embodiment, the inhibiting portion 15 is provided on the outer periphery of the advancing/retreating member 11, extends in the circumferential direction, and is provided continuously with the spiral groove on the rear end side. In other words, the engagement surface of the inhibition portion 15 is provided continuously with the wall surface facing the rear end side of the spiral groove. The blocking portion 15 is provided as a recessed cutout portion that opens toward the rear end side. In this embodiment, the blocking portion 15 is a non-helical wall portion and has a surface extending in the axial direction. The inhibiting portion 15 may be configured in any way as long as it abuts against the engaging portion 46 and inhibits the retraction of the retractable member 11 . For example, when the spiral groove as the engaged portion 14 is provided on the case 4 side and the protrusion as the engaging portion 46 is provided on the retractable member 11 side, the inhibiting portion 15 is provided on the case 4 side. In addition, the inhibiting portion 15 is provided as a sliding surface on which the engaging portion 46 can slide due to the biasing force of a biasing member 27 that biases the advancing/retreating member 11 described later in the direction around the axis.

The protrusion as the engaging portion 46 of the advancing/retreating member holding portion 41 and the spiral groove as the engaged portion 14 of the advancing/retreating member 11 move the advancing/retreating member 11 forward and backward while rotating relative to the case 4 . configure the mechanism.

The spiral groove as the engaged portion 14 of the advance/retreat member 11 is an example of a trajectory guide portion that guides the advance/retreat member 11 along the trajectory of the rotational movement of the advance/retreat member 11 , and the engagement of the advance/retreat member holding portion 41 . The portion 46 is an example of a portion to be trajectory guided by the trajectory guiding portion. As a modification, the advancing/retreating member holding portion 41 may be provided with a trajectory guiding portion such as a spiral groove, and the advancing/retreating member 11 may be provided with a trajectory guided portion such as a projection. That is, one of the case 4 and the advancing/retreating member 11 has a trajectory guide portion for guiding the movement trajectory of the advancing/retreating member 11 so as to move forward and backward while rotating relative to the case 4, and the other has a trajectory guiding portion. It is possible to adopt a configuration having a locus guided portion guided by.

In the present embodiment, as an example of the behavior in which the advance/retreat member 11 advances and retreats while rotating relative to the case 4, continuous rotation accompanying the advance/retreat movement of the advance/retreat member 11 is given. Other behaviors are also possible. For example, it may be a temporary rotation of the advancing/retreating member 11 in the process of advancing/retreating the advancing/retreating member 11, or at the start or end of the advancing/retreating movement, or intermittent rotation of the advancing/retreating member 11. may In either case, when the advancing/retreating member 11 is pushed in the backward direction without the engaging portion 46 and the engaged portion 14 sliding, the inhibiting portion 15 abuts against the engaging portion 46 to prevent the advancing/retreating member 11 from sliding. Inhibits 11 regression.

The advancing/retreating member 11 is restricted in advancing/retreating movement between an advanced position advanced with respect to the case 4 and a retreated retracted position with respect to the case 4 by the case 4 and the advancing/retreating member-side member 21 .
In the present embodiment, the advancing/retreating member 11 is attached with an advancing/retreating member-side member 21 that is movable in the advancing/retreating direction together with the advancing/retreating member 11 .
The advance/retreat member 11 can be moved back and forth together with the biasing member 27 by the advance/retreat member-side member holding portion 42 , the front side wall portion 40 and the rear end side wall portion of the case 4 .
The movement in the advance/retreat direction, the advance position, and the retreat position of the advance/retreat member 11 are all determined by the relative positional relationship with the case 4 .

[Retractable member side member 21]
The retractable member-side member 21 shown in FIGS. 7 and 10 is provided on the retractable member 11 so as to be relatively rotatable about the axis of the retractable member 11 .
The advancing/retreating member-side member 21 moves in the axial direction of the advancing/retreating member 11 together with the advancing/retreating member 11 . The advancing/retreating member-side member 21 has a fitting portion that fits into a circumferential groove provided in the advancing/retreating member 11 , thereby guiding the advancing/retreating member 11 while allowing the direction around the axis of the advancing/retreating member 11 .
The advancing/retreating member-side member 21 moves within the case 4 to regulate the advancing position and the retreating position of the advancing/retreating member 11 that moves in the advancing/retreating direction with respect to the case 4 .

The retractable member side member 21 is arranged between the front side wall portion 40 and the rear end side wall portion of the case 4 and between the retractable member side member holding portion 42 and the retractable member 11 .
The advancing/retreating member-side member 21 restricts the movement of the advancing/retreating member 11 in the advancing direction by coming into contact with the front side wall portion 40 when moving in the advancing direction with respect to the case 4 together with the advancing/retreating member 11 . The advancing/retreating member-side member 21 moves in the retreating direction with respect to the case 4 together with the advancing/retreating member 11, and contacts the rear end side wall portion or a part of the case 4 in the vicinity of the rear end side wall portion. Restrict movement in the backward direction.
In the present embodiment, the retractable member-side member 21 defines an advanced position and a retracted position of the retractable member 11 .

Further, in the present embodiment, the advancing/retreating member-side member 21 has a recessed portion 24 as an example of an engaged portion that engages with the restricting member 90 . The retractable member-side member 21 is provided to facilitate engagement with the restricting member 90 , and can be engaged with the restricting member 90 because it does not rotate around the axis of the retractable member 11 .

As shown in FIG. 10 and the like, the retractable member-side member 21 is arranged parallel to the axis of the retractable member 11, and includes a first plate-shaped portion 21a that slides on the retractable member-side member holding portion 42, and a first plate-shaped portion. A second plate-like portion 21b is provided perpendicular to the axis of the advancing/retreating member 11 from the distal end side of the advancing/retreating member 11, that is, the end side portion on the advancing side in the advancing/retreating direction of the advancing/retreating member 11, and arranged opposite to the front side wall portion 40. have.

A concave portion 24 is provided in the first plate-like portion 21 a of the retractable member side member 21 .
The concave portion 24 engages with the restricting member 90 to restrict the movement of the retractable member side member 21 in the direction along the central axis of the retractable member 11 . The engaging piece 91 (see FIGS. 3 and 5) of the restricting member 90 enters the concave portion 24 from the surface side of the first plate-like portion 21a, specifically, from the advancing/retracting member-side member holding portion 42 side. In the concave portion 24, the advance/retreat length of the advancing/retreating member 11 limited by the engaging piece 91 of the limiting member 90 depends on the position in the axial direction of the surface of the first plate-shaped portion 21a that partitions the concave portion 24 on the backward direction side. can be changed. In this embodiment, the recess 24 is provided at a position into which the engaging piece 91 is inserted when the retractable member 11 is positioned at the retracted position. The concave portion 24, which is the locked portion, is formed by cutting the side portion of the first plate portion 21a on the bottom side of the case 4 in the thickness direction of the case 4, and the retractable member 11 is positioned at the retracted position. At this time, it is provided at a position facing the engaging piece 91 of the restricting member 90 .

As shown in FIG. 10, the second plate-shaped portion 21b has a C-shaped fitting portion 23, and the fitting portion 23 is formed in the annular groove 13 of the retractable member 11 shown in FIGS. to fit. As a result, the second plate-shaped portion 21b slides in the annular groove 13 in the direction around the axis of the advancing/retreating member 11, but the second plate-shaped portion 21b and the advancing/retreating member 11 do not move in the axial direction of the advancing/retreating member 11 and in the vertical direction. relative movement of is regulated. For this reason, the advancing/retreating member 11 and the advancing/retreating member side member 21 can relatively rotate in the rotation direction about the axial center of the advancing/retreating member 11 , and the advancing/retreating member 11 and the advancing/retreating member 11 can move in the axial direction of the advancing/retreating member 11 . The member-side member 21 becomes relatively immovable. Further, when the advancing/retreating member 11 moves forward, the second plate-shaped portion 21b comes into contact with the front side wall portion 40, thereby restricting the movement of the advancing/retreating member 11 in the forward direction.

Further, the retractable member-side member 21 is provided with a third plate-shaped portion 21c so as to intersect the first plate-shaped portion 21a and the second plate-shaped portion 21b at right angles.

The third plate-shaped portion 21c is slidably provided along the bottom surface of the case 4, and in the present embodiment, the retractable member-side member 21 is positioned between the short side portion on the rear end side of the first plate-shaped portion 21a. The rear end side edge portion of the third plate-shaped portion 21c abuts on a part of the case 4 such as the rear end side wall portion of the case 4 . As a result, movement in the retreating direction of the advancing/retreating member 11 to which the advancing/retreating member-side member 21 is attached is restricted.

When the fitting portion 23 is fitted into the annular groove 13, the retractable member-side member 21 surrounds the retractable member 11 in the circumferential direction with the first plate-shaped portion 21a and the third plate-shaped portion 21c. It is attached to the retractable member 11 . Further, the retractable member side member 21 is provided with a curved surface 25 having a shape along the outer surface of the rod portion of the retractable member 11 . Then, the retractable member side member 21 and the retractable member 11 rotate relative to each other with the curved surface 25 along the outer surface of the rod portion of the retractable member 11 . This provides rattle-free rotation. The position of the second plate-shaped portion 21b having the fitting portion 23 on the advancing/retreating member-side member 21 is such that when the advancing/retreating member-side member 21 moves as the advancing/retreating member 11 advances, the first plate-shaped portion 21a and the second plate-shaped portion 21b move. It is sufficient if the plate-like portion 21c can abut on the inner wall surface around the through hole 43 of the case 4 .

The fitting structure between the advancing/retreating member 11 and the advancing/retreating member side member 21 may be any structure as long as both members can relatively rotate around the axial center of the advancing/retreating member 11. For example, the advancing/retreating member 11 may be provided with an annular projection, and the retractable member-side member 21 may be provided with an annular groove that engages with the annular projection. The annular protrusion may be replaced with multiple protrusions. The advancing/retreating member-side member 21 and the advancing/retreating member 11 move as the advancing/retreating member-side member 21 advances and retreats in the axial direction of the advancing/retreating member 11, and when the movement of the advancing/retreating member-side member 21 is restricted, the advancing/retreating member 11 moves. The specific shape is not particularly limited as long as the advancing/retreating member 11 is fitted so as to rotate relative to the advancing/retreating member-side member 21 while also restricting the movement of the member. If one of the fitting portion of the retractable member-side member 21 and the fitted portion of the retractable member 11 is annular, attachment is facilitated.

[biasing member 27]
The biasing member 27 biases the advance/retreat member 11 from the retracted retracted position side to the advanced forward position side with respect to the case 4 . The biasing member 27 biases the advancing/retreating member 11 in one rotation direction.
In this embodiment, the biasing member 27 also functions as a torsion coil spring, and advances and retreats at both ends 27b and 27c of the spring so that the winding axis of the spring coil portion 27a is coaxial with or parallel to the axis of the advancing/retreating member 11. It is fixed to the member 11 and the case 4 side.
In the present embodiment, one end portion 27b of the spring as the biasing member 27 is held at the end portion of the advance/retreat member 11 on the retracted position side, and the other end portion 27c is the case-side spring of the spring accommodating portion 52 of the case 4. It is fixed to the holding part. Thereby, the biasing member 27 biases the advancing/retreating member 11 in the direction around the axis while biasing the advancing/retreating member 11 in the forward direction in the direction of the winding axis. The engaging portion 46 guided from the spiral groove to the blocking portion 15 can be guided to the spiral groove again.
Although the urging member 27 is a coil spring in this embodiment, it is not limited to this, and may be an elastic body that urges the advancing/retreating member 11 in one rotation direction when the advancing/retreating member 11 advances.

In the present embodiment, the advancing/retreating member 11 urged in the advancing direction by the urging member 27 is moved forward by the advancing/retreating member side member 21 fitted relatively rotatably in the case 4 through the through hole 43 in the front side wall portion 40 . is regulated by coming into contact with the inner wall surface around the .

The forward movement of the advancing/retreating member 11 is caused by the biasing force of the biasing member 27, and the backward movement of the advancing/retreating member 11 is caused by an external force.

[Configuration of Limiting Mechanism 30]
The limit mechanism 30 includes a drive portion 60 , a rotary gear 74 , a lock position detector 80 , and a limit member 90 .
The restricting mechanism 30 engages with the advancing/retreating member 11 (in this embodiment, the advancing/retreating member side member 21 provided on the advancing/retreating member 11) to restrict the movement of the advancing/retreating member 11 in the advancing/retreating direction.
Specifically, the restriction mechanism 30 rotates the rotation gear 74 by driving the drive unit 60 to drive the restriction member 90, and the engagement piece 91 of the restriction member 90 is engaged with the advancing/retreating member 11 (in the present embodiment, , engages with an advancing/retreating member-side member 21 provided on the advancing/retreating member 11 to lock the advancing/retreating member 11 .

[Driver 60]
The driving section 60 generates driving force for moving the restricting member 90 . The driving portion 60 has a driving portion main body 62 that generates a driving force and a drive shaft 64 that rotates by the driving force of the driving portion main body 62 . In this embodiment, a motor is applied as the drive unit 60 .

A drive unit main body 62 is a motor main body driven by electric power supplied through a terminal 66, and a drive shaft 64 is a motor output shaft and has a drive gear. For example, the driving unit 60 may lock the restricting member 90 by driving it alone, but in the case where it is provided in a vehicle, the driving unit 60 performs the locking operation in conjunction with locking by operating a key of the vehicle. In this embodiment, the drive shaft 64 and the conversion mechanism portion 93 are arranged to extend in substantially the same direction. The terminal 66 is arranged at a position communicating with the lead-out hole 48 .

In the present embodiment, the terminal 66 is arranged adjacent to the drive section 60 on the retracted position side of the advancing/retreating member 11, one end is connected to the drive section main body 62 of the drive section 60, and the other end is led out. It is arranged in the hole 48 so as to face the opening direction of the lead-out hole 48 .

A drive shaft 64 protruding from the drive portion main body 62 is arranged in parallel with the direction in which the advancing/retreating member 11 extends (corresponding to the advancing/retreating direction). In the present embodiment, the driving portion 60 is held by the driving portion main body holding portion 45 so as to be adjacent to the limiting member holding portion 50 in the case 4 in a direction perpendicular to the advancing/retreating direction.

A drive gear is fixed to the drive shaft 64 so as to rotate when the drive unit 60 is driven. The driving gear meshes with the rotating gear 74 to rotate the rotating gear 74 in a driven manner.

The rotating gear 74 is a transmission member 70 that transmits the driving force of the driving portion 60 to the limiting member 90 . That is, the limiting member 90 is moved by transmitting the rotational force of the drive shaft 64 to the limiting member 90 . The rotation gear 74 rotates around a rotation axis parallel to the drive shaft 64 as the drive shaft 64 rotates.

In the present embodiment, the rotary gear 74 integrally has a large gear portion that engages with the drive gear and a small gear portion coaxially with the large gear portion.

[Lock position detector 80]
The lock position detector 80 determines the timing at which the restricting member 90 locks the advancing/retreating member 11 that advances and retreats.

In the present embodiment, the lock position detector 80 detects the position at which the retractable member 11 is locked when the fuel lid 120 is in the closed state, that is, when the lid locking portion 12 and the lid locked portion 140 are in the engaged state. To detect.

The lock position detection portion 80 has a contact portion 83 , a biasing member 84 for position detection, and a movement detection portion 86 .

The abutting portion 83 is arranged so as to be movable in parallel with the advancing/retreating direction of the advancing/retreating member 11 in a state in which a protruding portion 83a protrudes from the front side wall portion 40 to the outside through a through hole formed in the front side wall portion 40. It is The contact portion 83 is biased by a biasing member 84 in the projecting direction, that is, in the advancing direction of the retractable member 11 .

The contact portion 83 is pressed against the fuel lid 120 by the end surface of the protruding portion 83 a , so that the inner portion 83 b moves in the backward direction against the biasing force of the biasing member 84 .

A protruding portion 83a of the contact portion 83 that protrudes from the front side wall portion 40 to the outside is covered with an extendable tubular portion 82 that extends and retracts in the advancing/retreating direction. Therefore, even if the projecting portion 83a is pressed and the contacting portion 83 moves in the backward direction with respect to the front side wall portion 40, the projecting portion 83a of the contacting portion 83 is It appears on the side wall portion 40 .

The inner portion 83b of the contact portion 83, which is located inside the case 4 relative to the front side wall portion 40, is subjected to the biasing force of the biasing member 84 and the biasing member 84 for detecting the moving contact portion 83. Move backward against it.

The contact portion 83 is arranged to extend in the forward/backward direction, and the internal portion 83b is arranged in the case 4 so as to be movable in the forward/backward direction.

The movement detection section 86 detects the internal portion 83b of the contact section 83 and outputs the result to the drive section 60 or the control section that drives and controls the drive section 60 . The movement detection unit 86 is composed of, for example, a switch or a sensor.

By detecting the movement of contact portion 83 , movement detection portion 86 detects movement of fuel lid 120 pressing contact portion 83 to the closed position. When the fuel lid 120 is at the closed position, that is, when the lid locking portion 12 and the lid locked portion 140 are in an engaged state, the retractable member 11 is at the retracted position. Thereby, the movement detection unit 86 detects the closed position of the fuel lid 120 and drives the restricting member 90 at that timing.

In this way, when the internal portion 83b moves inside the case 4 against the biasing force of the biasing member 84, the movement detecting portion 86 detects the movement of the contact portion 83 in the backward direction. , the motor, which is the drive unit main body 62, is driven to move the limit member 90. As shown in FIG.

[Limiting member 90]
The restricting member 90 engages with the advancing/retreating member 11 side (in this embodiment, the advancing/retreating member side member 21) when the advancing/retreating member 11 moves to the retracted position, thereby restricting the axially movable advancing/retreating member 11. A restricted state in which forward and backward movement is restricted. The restricted state is a state in which the forward/backward movement member 11 is held at the retracted position and is restricted from forward/backward movement. The restricting member 90 is provided movably between a restricting position where the retractable member 11 is restricted and a release position where the restricting state is released.

In the present embodiment, the restricting member 90 places the retractable member 11 in a restricted state, that is, a locked state, by engaging the retractable member 11 with the retractable member side member 21 at the restricting position. As an example, in the present embodiment, the position of the advancing/retracting member 11 when the lid engaging portion 12 is engaged with the lid engaged portion 140 of the fuel lid 120 is defined as the limiting position. In the actual embodiment, this position is the position of the advance/retreat member 11 when the movement detection portion 86 of the lock position detection portion 80 detects the movement of the contact portion 83 in the backward direction. Further, as an example of the restricted position, the retractable member side member 21 may be located at the same position as the position restricted by a part of the case 4, for example, the rear end side wall.

In this way, when the advancing/retreating member 11 is positioned at the retracted position, the restricting member 90 puts the advancing/retreating member 11 into the restricting state by the lock position detecting portion 80, thereby restricting the movement to the forward position. Note that the restricted position does not have to be the retracted position held by the advancing/retreating member side member 21, and the lid engaging portion 12 and the lid engaged portion 140 are separated while the advancing/retreating member 11 moves from the retracted position to the advanced position. It may be configured to restrict the movement of the advancing/retreating member 11 until the locked state with is released. Note that the restricted state in which forward and backward movement is restricted typically refers to a state in which movement in the forward direction and movement in the backward direction are both restricted, as will be described later. may be in a state in which movement in only one direction is restricted.

In this embodiment, the restricting member 90 includes an engaging piece 91 that engages with the concave portion 24 provided in the advancing/retreating member side member 21 at the restricting position, and a conversion mechanism portion 93 that converts the rotation of the rotary gear 74 into linear motion. have In the restricting member 90, the rotation of the rotary gear 74 is converted by the conversion mechanism 93 to linearly move the engaging piece 91 linearly.

In this embodiment, as shown in FIGS. 3 and 5, the restricting member 90 is formed in a flat plate shape and has an engaging piece 91 and a conversion mechanism 93 connected to the rotating gear 74. .

The engaging piece 91 is provided to extend from the conversion mechanism portion 93 in a direction intersecting the advancing/retreating direction of the advancing/retreating member 11 , and is capable of engaging with the advancing/retreating member 11 , specifically, the concave portion 24 of the advancing/retreating member-side member 21 . . The conversion mechanism 93 is a rack that meshes with the rotary gear 74 and moves in the extending direction of the engagement piece 91 .

The restricting member 90 is held by the restricting member holding portion 50 of the case 4 so as to be slidable in a direction perpendicular to the advancing/retreating direction. Further, the restricting member 90 is urged by an urging member 96 for the restricting member 90 in the direction in which the engaging piece 91 engages with the recess 24 . The driving portion 60 moves the restricting member 90 toward the advancing/retreating member 11 against the biasing force of the biasing member 96 .

When the retractable member 11 is in the retracted position and the restricting member 90 moves by a predetermined amount or more, the engaging piece 91 of the restricting member 90 enters the concave portion 24 of the retractable member side member 21, and the concave portion 24, which is the engaged portion, is engaged. , and puts the advancing/retreating member 11 in a restricted state in which the advancing/retreating movement is restricted. Note that the tip of the engaging piece 91 may have a tapered portion 911 to facilitate insertion into the recess 24 . In particular, it is preferable that the engaging piece 91 is provided with a tapered portion 911 that descends toward the recessed portion 24 toward the retracted position on the side portion on the forward position side. As a result, when the advancing/retreating member 11 is positioned at the advanced position, the engaging piece 91 is positioned at the engagement position with the recess 24, and when the advancing/retreating member 11 is moved to the retreated position, the biasing force of the biasing member 96 is applied. The taper 911 of the engaging piece 91 may slide on the first plate-like portion 21 a of the advancing/retreating member side member 21 so that the engaging piece 91 engages with the concave portion 24 .

When the restricting member 90 is at the release position, the retractable member 11 can move forward and backward. Note that the structure for setting the retractable member 11 in the restricted state is not limited to the configuration in which the engaging piece 91 of the restricting member 90 enters the concave portion 24 of the retractable member-side member 21, and various engagement structures may be applied. . For example, the advance/retreat member 11 may be provided with a convex portion, and the restricting member 90 may be provided with a concave portion.

[Operation of advance/retreat device 1]
In the advancing/retreating movement device 1, when the advancing/retreating member 11 is positioned at the retracted position, it is in a restricted state by the restricting member 90, and movement in the forward direction is restricted. At this time, the lid locking portion 12 and the lid locked portion 140 are engaged with each other, and the fuel lid 120 is positioned at the closed position.

When the advancing/retreating member 11 is at the retracted position, the restricting member 90 is biased by the restricting member biasing member 96 toward the advancing/retreating member 11 side, that is, in the direction of engaging with the concave portion 24 of the advancing/retreating member side member 21 . there is Therefore, when the fuel lid 120 is in the closed position, even if power is not supplied to the motor of the driving portion main body 62 of the driving portion 60, the advancing/retreating member 11 can move in the advancing/retreating direction, more specifically, in the advancing direction. are regulated so that there is no

When moving the advancing/retreating member 11 from the retracted position to the advanced position, that is, when moving the fuel lid 120 from the closed position to the open position, the drive unit 60 is driven to move the restricting member 90 through the rotation gear 74 to the advancing/retreating member. Rotate in a direction away from the 11 side. As a result, the engaging piece 91 of the restricting member 90 moves away from the recess 24 and comes out of the recess 24 , releasing the restricting state of the advancing/retracting member 11 .

The advancing/retreating member 11 whose restricted state is released is urged in the forward direction by the urging force of the urging member 27 and moves in the forward direction. At this time, the advancing/retreating member 11 slides while the helical groove serving as the engaged portion 14 is guided by the projection serving as the engaging portion 46 , and the advancing/retreating member 11 rotates relative to the case 4 . 11 axial movement.

As the retractable member 11 rotates, the lid engaging portion 12 at the distal end portion of the retractable member 11 also rotates, and its angular position becomes a predetermined angular position in the lid engaged portion 140 . As a result, the advancing/retreating member 11 pushes up the fuel lid 120 in the forward direction and moves to the forward position while being disengaged from the lid locked portion 140 . Thus, fuel lid 120 is positioned at the open position.

When moving the advancing/retreating member 11 from the advancing position to the retreating position, the protrusion, which is the engaging portion 46, is slid within the spiral groove, which is the engaged portion 14, so that the advancing/retreating member 11 moves in the direction of retreating. , apply an external force to the retractable member 11 . In the present embodiment, moving the retractable member 11 from the forward position to the retracted position corresponds to moving the fuel lid 120 from the open position to the closed position.

In the present embodiment, the fuel lid 120 is moved to the closed position side to press the advancing/retreating member 11 in the backward direction.

Specifically, the fuel lid 120 is moved to the closed position side, the lid locking portion 12 is inserted into the hole of the lid locked portion 140, and the advancing/retreating member 11 is pushed backward through the fuel lid 120. A tapered guide bottom surface may be provided around the hole of the lid engaged portion 140 of the fuel lid 120 to guide the lid engaging portion 12 into the hole.
As a result, the lid locking portion 12 is guided into the hole of the lid locked portion 140 and further pushed in the backward direction, thereby locking the lid locked portion 140 within the lid locked portion 140 . Rotate in the direction of the angular position that
The helical groove of the advance/retreat member 11 is guided by the projection of the case 4 to the retracted position so that the lid engaging portion 12 forms a movement locus of the advance/retreat member 11 that engages with the lid engaged portion 140 . Moving.

With such rotation of the lid locking portion 12, the advance/retreat member 11 itself rotates, and the inhibition portion 15 moves the projection along the inhibition surface 16 in the circumferential direction without inhibiting the movement of the projection, which is the engaging portion 46. , and is guided to the spiral groove of the engaged portion 14, and the advancing/retreating member 11 moves to the retracted position while rotating.

When the fuel lid 120 is positioned at the closed position side, the advancing/retreating member 11 moves to the retracted position side, and the fuel lid 120 moves the projecting portion 83a of the contact portion 83 covered with the telescopic cylinder portion 82 of the lock position detecting portion 80 to the case. 4 side to move in the backward direction.

As a result, the contact portion 83 moves toward the retracted position against the biasing force of the biasing member 84 , and the movement detection portion 86 detects the movement of the contact portion 83 . Based on the detection of the movement of the contact portion 83 , the driving portion 60 drives the driving portion main body 62 to rotate the driving shaft 64 and transmit the driving force to the rotating gear 74 . The rotary gear 74 is rotated by the transmitted driving force and transmitted to the conversion mechanism portion 93 of the limiting member 90 to linearly move the conversion mechanism portion 93 . Due to the movement of the conversion mechanism 93, the engaging piece 91 of the restricting member 90 moves toward the advancing/retreating member 11 and engages with the concave portion 24 of the advancing/retreating member 11, so that the advancing/retreating member 11 is restricted at the retracted position.

[Effects of advance/retreat device 1]
According to the advance/retreat device 1 of the present embodiment, as shown in FIGS. It has an inhibiting portion 15 that abuts against the engaging portion 46 and inhibits the retraction of the advancing/retreating member 11 when pushed in the retreating direction without sliding with the portion 14 .

As a result, in the advancing/retreating movement device 1, the advancing/retreating member 11 in the advanced position can be moved to the engaged portion 14 having the spiral groove without using the fuel lid 120 by mischievous operation or the like. Since the engaging portion 46 abuts against the inhibiting portion 15 even if it is pushed in the retreating direction without being slid, the retreating of the advance/retreat member 11 can be inhibited.
Therefore, unlike the prior art, even if the retractable member itself is directly pushed in the retracting direction by an external force, it will not move to the retracted position. As a result, the concave portion 24 does not engage with the engaging piece 91 of the restricting member 90 at the retracted position, and the restricted state is prevented.

As described above, according to the advance/retreat device 1, the advance/retreat member 11 will not be positioned at the retracted position and will not be restricted due to a mischievous operation. According to the advancing/retreating device 1, the advancing/retreating member 11 can be normally moved to the retracted position only when the fuel lid 120 is used to move the fuel lid 120 to the closed position.

Further, when the forward/backward moving device 1 is applied to a fuel lid opening/closing device, the forward/backward moving device 1 itself can be made compact without using a heart cam, and can be accommodated in a thin and narrow accommodation space in the thickness direction.

It should be noted that the present invention is not limited to the above embodiments, and can be modified in various ways. For example, in the above-described embodiment, the restricting member 90 moves straight, but the restricting member 90 may move in a circular motion and engage with the advancing/retreating member-side member.

In addition, as an opening/closing device, a fuel lid opening/closing device has been exemplified, but the advancing/retreating device of the present invention can be similarly applied to various flap type opening/closing devices. Further, the advance/retreat device may be mounted on various devices other than the opening/closing device.

REFERENCE SIGNS LIST 1 advancement/retraction movement device 2 vehicle body 2a oil supply opening 4 case 11 advancement/retraction member 12 lid locking portion 13 annular groove 14 engaged portion 15 inhibition portion 16 inhibition surface 21 advancement/retraction member side member 21a first plate-shaped portion 21b second plate-shaped Part 21c Third plate-shaped part 23 Fitting part 24 Recess 25 Curved surface 27, 84, 96 Biasing member 27a Spring coil part 27b One end 27c Other end 30 Limiting mechanism 40 Front side wall part 41 Retraction member holding part 42 Retraction member side member Holding part 43 Through hole 45 Drive part main body holding part 46 Engagement part 48 Lead-out hole 50 Limiting member holding part 52 Spring accommodating part 60 Drive part 62 Drive part main body 64 Drive shaft 66 Terminal 70 Transmission member 74 Rotating gear 80 Lock position detection part 82 Telescopic cylinder part 83 Contact part 83a Protruding part 83b Internal part 86 Movement detection part 90 Limiting member 91 Engagement piece 93 Conversion mechanism part 100 Opening and closing device 110 Box body 112 Opening 120 Fuel lid 130 Hinge 140 Lid locked part 142 Rotation assistance Part 160 screw cap

Claims (3)

a case;
a retractable member that can move forward and backward with respect to the case;
a biasing member that biases the advance/retreat member from the retracted retracted position side toward the advanced forward position side with respect to the case;
an engaged portion provided on one of the case and the retractable member;
an engaging portion provided on the other of the case and the retractable member;
has
The engaged portion is spirally provided in a direction around the axis of the retractable member,
The engaging portion slides on the engaged portion by restricting relative axial movement of the advance/retreat member due to engagement with the engaged portion,
The advancing/retreating member is provided so as to move relative to the axial direction of the advancing/retreating member while rotating relative to the case by sliding between the engaged portion and the engaging portion,
The biasing member biases the advance/retreat member in one rotation direction when the advance/retreat member advances,
The engaged portion is
a non-helical inhibition portion provided on the advancing/retreating member, extending in the circumferential direction, and continuing to the spiral portion of the engaged portion on the rear end side of the advancing/retreating member;
The inhibiting portion abuts against the engaging portion when the advancing/retreating member in the advanced position is pushed in a backward direction without sliding between the engaging portion and the engaged portion. hindering the member from retreating;
Retraction movement device. The biasing member is a torsion coil spring, and both ends of the spring are fixed to the retractable member and the case so that the winding axis of the spring coil portion is coaxial with or parallel to the axis of the retractable member,
while urging the advancing/retreating member in the forward direction in the direction of the winding axis, urging the advancing/retreating member in the one rotation direction in the torsion direction of the spring coil portion;
2. The advance/retreat device according to claim 1. a restricting member that engages with the advancing/retreating member when the advancing/retreating member moves to the retracted position so as to place the advancing/retreating member in a restricted state in which the advancing/retreating movement of the advancing/retreating member is restricted;
3. The advance/retreat device according to claim 1 or 2.

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