Advance / retreat moving device and lid opening / closing device

Abstract

To provide a forward / backward moving device which can move a forward / backward member to a backward holding position even when a lock member is located in a lock position.SOLUTION: A forward / backward moving device comprises a forward / backward member and a lock member 5. The forward / backward member has an abutment part CT which can abut on an abutted part 5a of the lock member 5 in an axis-around direction. When the lock member 5 is in a lock position, the abutted part 5a and the abutment part CT are positioned in such a positional relationship that the abutted part 5a does not abut on the abutment part CT of the forward / backward member until the forward / backward member has moved to a backward holding position from a forward holding position, and that when a force is applied in a direction in which the lock member rotates in the axis-around direction, the abutted part 5a lies opposite the abutment part CT in the axis-around direction to limit the rotation of the forward / backward member in the axis-around direction within a prescribed range so that the forward / backward member does not move to the forward holding position.SELECTED DRAWING: Figure 16

Description

[Technical Field]

[0001] The present invention relates to an advance / retreat moving device and a lid opening / closing device. [Background technology]

[0002] Devices in which a rod member moves relative to a case, such as a device for locking a lid that covers a vehicle's fuel filler port, are configured to move back and forth between a forward position in which the rod member protrudes from the case and a backward position in which the rod member is accommodated in the case (see, for example, Patent Document 1).

[0003] The device of Patent Document 1 comprises a case, a push rod (rod member) that moves between an advanced position and a retracted position relative to the case, a biasing member that biases the push rod in the protruding direction, and a locking section (locking member) that locks the push rod when the push rod is held in the retracted position.

[0004] In Patent Document 1, the push rod moves in the forward direction when the lid is opened, and is then held at a predetermined forward holding position. Furthermore, the push rod moves in the rearward direction when the lid is closed, and is then held at a predetermined rearward holding position. The process by which the push rod moves from the forward holding position to being held at the rearward holding position will be described in more detail below. When the push rod in the forward holding position is pressed in the rearward direction when the lid is closed, the push rod reaches the rearward holding position, and then moves further in the rearward direction beyond the rearward holding position. The push rod then returns in the forward direction due to the biasing force of the biasing member, and is then held at the rearward holding position. Furthermore, during the process by which the push rod is held at the forward holding position, it moves in the rearward direction from the rearward holding position, and then moves in the forward direction due to the biasing force of the biasing member, and is held at the forward holding position.

[0005] The device of Patent Document 1 also has a locking unit (locking member) for locking the push rod in the retracted position. The locking unit has an engaging member that engages with a pin-shaped slider of the push rod. The engaging member engages with the pin-shaped slider by moving in a direction perpendicular to the axis of the push rod. Specifically, when the push rod is in the retracted position, the locking member of the locking unit moves toward the pin-shaped slider provided on the outer periphery of the push rod. As a result, the engaging member engages with the pin-shaped slider in the forward and backward directions of the push rod, locking the push rod. On the other hand, when the push rod is in the forward position, even if the locking member of the locking unit moves toward the push rod, the engaging member abuts against the end face of the pin-shaped slider, preventing the engagement member from moving. As a result, when the push rod is in the forward position, the engaging member does not move to the locked position, preventing the push rod from being accidentally locked. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-173422 Summary of the Invention [Problem to be solved by the invention]

[0007] In the case of a device such as that described in Patent Document 1, for example, when the advancing / retreating member is in the forward holding position, such as when the lid is open, even if an operation to move the locking member to the locked position is performed, the locking member does not move to the locked position. Therefore, after moving the advancing / retreating member from the forward holding position to the retracted holding position, an operation to move the locking member to the locked position again is required. This makes the operation to lock the advancing / retreating member cumbersome. Furthermore, if the user forgets to perform the locking operation when the advancing / retreating member is in the retracted holding position, the advancing / retreating member will be unlocked (for example, the lid will be able to be opened).

[0008] Therefore, an object of the present invention is to provide an advance / retract movement device and a lid opening / closing device that can move a locking member to a locked position regardless of the axial position of the advance / retract member, that can move the advance / retract member to a retracted holding position even when the locking member is in the locked position, and that can easily lock the advance / retract member at the retracted holding position. [Means for solving the problem]

[0009] The advance / retract movement device of the present invention comprises a case, an advance / retract member that is movable relative to the case while rotating around an axis in an advance direction in which the advance member protrudes from the case and in a retract direction that is opposite to the advance direction, a biasing member that biases the advance / retract member in the advance direction, a cam mechanism that is configured to hold the advance / retract member at an advance holding position where it has moved in the advance direction and at a retracted holding position where it has moved in the retracted direction, and a locking member that is movable between a locked position that restricts movement of the advance / retract member to the advance holding position when the advance / retract member is located at the retracted holding position and an unlocked position that allows movement of the advance / retract member to the advance holding position, and when the advance / retract member moves between the advance holding position and the retracted holding position, the advance / retract member passes through a folded position that is further retracted relative to the retracted holding position and is rotated a predetermined angle around the axis relative to the retracted holding position. The advancing / retreating member has an abutting portion that can abut against the abutted portion of the locking member at the locked position in the direction around the axis when a force acts on the advancing / retreating member in a direction rotating about the axis from the retracted holding position toward the folded-back position, and when the locking member is at the locked position, the abutted portion and the abutting portion are positioned such that the abutted portion does not abut against the abutting portion of the advancing / retreating member until the advancing / retreating member moves from the advanced holding position to the retracted holding position via the folded-back position, and also such that the abutted portion faces the abutting portion in the direction around the axis and limits the rotation of the advancing / retreating member in the direction around the axis to a predetermined range, so that the advancing / retreating member does not move to the advanced holding position when a force acts on the advancing / retreating member in the retracted direction and rotates about the axis. [Effects of the Invention]

[0010] According to the advance / retreat movement device and lid opening / closing device of the present invention, the locking member can be moved to the locked position regardless of the axial position of the advance / retreat member, and even when the locking member is in the locked position, the advance / retreat member can be moved to the retracted holding position, making it easy to lock it at the retracted holding position. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view showing an advance / retract movement device according to an embodiment of the present invention, with the advance / retract member held in an advance holding position. FIG. [Figure 2] 1 is a perspective view showing an advance / retract movement device according to an embodiment of the present invention, with the advance / retract member held in a retracted holding position. FIG. [Figure 3] 10 is a schematic diagram showing the relationship between a locking portion of the advancing / retreating member of the advancing / retreating device and an operation target side locked portion of the fuel lid. FIG. [Figure 4] 1 is a perspective view of the advancing and retreating device with a portion of the case cut away, showing the advancing and retreating member in the advanced holding position and the locking member in the unlocked position; FIG. [Figure 5] FIG. 2 is an exploded perspective view of the advance / retreat movement device of FIG. [Figure 6] 10 is a schematic side view showing the state in which the locking member moves between a locked position and an unlocked position. FIG. [Figure 7] 10 is a schematic top view showing the locking member moving between a locked position and an unlocked position. FIG. [Figure 8] 10 is a schematic diagram showing the advancing / retreating member and the cam mechanism when the advancing / retreating member is located at the advanced holding position and the locking member is located at the unlocked position, the ... [Figure 9] 9 is a schematic diagram showing a state in which the advancing / retracting member has moved in the retreating direction from the state shown in FIG. 8, and is moving toward the folded-back position. FIG. [Figure 10] 10 is a schematic view showing a state in which the advancing / retreating member has moved in the forward direction from the state shown in FIG. 9 and has reached a retracted holding position. FIG. [Figure 11] 11 is a schematic view showing a process in which the advancing / retracting member moves in the retreating direction from the state shown in FIG. 10 and moves toward the folded-back position. FIG. [Figure 12] 12 is a schematic view showing a process in which the advancing / retreating member moves from the state shown in FIG. 11 to the advanced holding position. [Figure 13] 10 is a schematic diagram showing the advancing / retreating member and the cam mechanism when the advancing / retreating member is located at the advanced holding position and the locking member is located at the locking position, the ... [Figure 14] 14 is a schematic view showing a state in which the advancing / retreating member has moved from the state shown in FIG. 13 to a folded-back position. [Figure 15] 15 is a schematic view showing a state in which the advancing / retreating member has moved from the state shown in FIG. 14 and is held at a retracted holding position. FIG. [Figure 16] 16 is a schematic view showing a state in which the advancing / retreating member has moved in the retreating direction from the state shown in FIG. 15. FIG. [Figure 17] 10 is a schematic diagram showing an example in which a guided portion is formed in a trapezoidal shape. FIG. [Figure 18] 10 is a schematic view for explaining an inclined surface formed between the contact portion of the guided portion and the second contact surface. FIG. [Figure 19] FIG. 10 is a schematic top view of a modified example of an advancing and retreating movement device. DETAILED DESCRIPTION OF THE INVENTION

[0012] An advancing / retreating device according to one embodiment of the present invention will be described below with reference to the drawings. Note that the embodiment described below is merely an example, and the advancing / retreating device of the present invention is not limited to the following embodiment. Note that in this specification, expressions such as "perpendicular to A" and similar expressions do not refer only to a direction that is completely perpendicular to A, but also include a direction that is approximately perpendicular to A. Furthermore, in this specification, expressions such as "parallel to B" and similar expressions do not refer only to a direction that is completely parallel to B, but also include a direction that is approximately parallel to B. Furthermore, in this specification, expressions such as "C-shape" and similar expressions do not refer only to a perfect C-shape, but also include a shape that visually resembles a C-shape (approximately a C-shape).

[0013] As shown in FIG. 1 , the advancing / retreating device 1 includes a case 2 and an advancing / retreating member 3 that is movable relative to the case 2 in a forward direction D1 protruding from the case 2 and a backward direction D2 opposite to the forward direction D1 while rotating around an axis X. Both the forward direction D1 and the backward direction D2 are collectively referred to as the axis X direction. In this specification, the axis X refers to the advancing / retreating axis along which the advancing / retreating member 3 advances and retreats (advances and retreats). In this embodiment, the axis X corresponds to the longitudinal axis of the advancing / retreating member 3, which is a shaft-like member elongated in the advancing / retreating direction. The direction around the axis X refers to the direction in which the advancing / retreating member 3 rotates around the axis X. One of the directions of rotation around the axis X is referred to as one direction D3 around the axis X, and the opposite direction of the one direction D3 around the axis X is referred to as the other direction around the axis X.

[0014] The advancing / retreating movement device 1 interacts with a predetermined operation target when the advancing / retreating member 3 advances or retreats relative to the case 2. The interaction between the advancing / retreating member 3 and the operation target may be such that the advancing / retreating member 3 acts on the operation target, or such that the operation target acts on the advancing / retreating member 3. In this embodiment, the advancing / retreating member 3 is operated by operating the lid L (see FIGS. 3 and 4), which is the operation target. However, the interaction between the advancing / retreating member 3 and the operation target is not particularly limited, and may be other action, such as the advancing / retreating member 3 pressing against the operation target to operate the operation target.

[0015] The application of the advancing / retreating device 1 is not particularly limited as long as it can interact with a predetermined operation target when the advancing / retreating member 3 advances or retreats relative to the case 2. In this embodiment, as shown in FIG. 4 , the advancing / retreating device 1 is applied to a lid opening / closing device D, which includes the advancing / retreating device 1, a base B to which the advancing / retreating device 1 is attached and which has an opening Ba, and a lid L that can open and close the opening Ba of the base B and can engage with an end (locking portion 31) of the advancing / retreating member 3 in the forward direction D1. More specifically, the lid L is a lid for supplying fuel or electricity to a vehicle, and the advancing / retreating device 1 is applied to the lid opening / closing device D for a vehicle and is configured to open and close the lid L for supplying fuel or electricity to the vehicle, which is the operation target. Note that the vehicle fuel is not limited to diesel or gasoline, but refers to any fuel that can power a vehicle.

[0016] In this embodiment, as shown in FIG. 4 , the lid opening / closing device D includes a lid (hereinafter sometimes referred to as a fuel lid) L that is mounted on a vehicle body (hereinafter referred to as vehicle body B) as a base and that can be opened and closed via a hinge H, and an advancing / retreating device 1 that is attached to the vehicle body B and that locks and unlocks the fuel lid L by advancing and retracting a retractable member 3. The fuel lid L has an operation target-side locked portion La to which a locking portion 31 provided at the tip of the advancing / retreating member 3 is locked. In this embodiment, the locking portion 31 is a rectangular plate-shaped locking piece, and the operation target-side locked portion La is a locking hole with a rectangular opening into which the locking portion 31 can be locked. As shown by the dashed line in FIG. 3 , when the locking portion 31 is positioned so that it can be removed from the opening of the operation target-side locked portion La, the lock between the locking portion 31 and the operation target-side locked portion La can be released. On the other hand, when the locking portion 31 rotates from the state shown by the dotted line in Figure 3 to the state shown by the solid line and is positioned so that it cannot be released from the opening of the locking portion La on the operation target side, the locking portion 31 and the locking portion La on the operation target side are locked.

[0017] Although details will be described later, in this embodiment, when the fuel lid L is in a closed state, the fuel lid L is pressed and the advancing / retreating moving device 1 is operated, thereby releasing the engagement between the locking portion 31 and the operation-target-side locked portion La, and the fuel lid L is opened. When the engagement between the locking portion 31 and the operation-target-side locking portion La is released, the fuel lid L may be spring-biased in the direction of opening and thus opened. Alternatively, the fuel lid L may be pushed in the opening direction by the advancing / retreating member 3 and slightly opened, and then manually opened. When the fuel lid L is closed from the open state shown in FIG. 4 , the fuel lid L is manually moved in the closing direction. This causes the fuel lid L to press the advancing / retreating member 3, causing the advancing / retreating member 3 to retract. At this time, the locking portion 31 rotates from the state shown by the dashed line in FIG. 3 to the state shown by the solid line, and is locked by the operation target side locked portion La, maintaining the fuel lid L in the closed state.

[0018] Next, the forward and backward moving device 1 will be described in detail.

[0019] As shown in Figures 5 and 8 to 16, the advancing / retreating device 1 includes a biasing member 4 that biases the advancing / retreating member 3 in the advancing direction D1, a cam mechanism C that is configured to hold the advancing / retreating member 3 at an advanced holding position moved in the advancing direction D1 (see Figures 1, 8 and 13) and at a retracted holding position moved in the retracted direction D2 (see Figures 2, 10 and 15), and a locking member 5 that is movable between a locked position (see dashed double-dashed lines in Figures 6 and 7) that restricts movement of the advancing / retreating member 3 to the advanced holding position when the advancing / retreating member 3 is located at the retracted holding position, and an unlocked position (see solid lines in Figures 6 and 7) that allows movement of the advancing / retreating member 3 to the advanced holding position.

[0020] The case 2 houses the components of the advancing and retreating movement device 1 inside. In this embodiment, the case 2 houses a part of the advancing and retreating member 3, the biasing member 4, the cam mechanism C, and the locking member 5. It is sufficient that the case 2 houses at least a part of each component of the advancing and retreating movement device 1, and it is not necessary that the case 2 houses each component in its entirety. There are no particular limitations on the shape or structure of the case 2 as long as it can house the components of the advancing and retreating movement device 1 inside. The case 2 may be made up of a single member or multiple parts.

[0021] In this embodiment, as shown in FIGS. 1, 2, and 6, the case 2 has an advancing / retreating member accommodating section 21 that accommodates the advancing / retreating member 3 and a locking member accommodating section 22 that accommodates the locking member 5. The advancing / retreating member accommodating section 21 has an accommodating space that accommodates the advancing / retreating member 3 so that it can advance and retreat in the direction of axis X. In this embodiment, the advancing / retreating member accommodating section 21 is configured as a cylindrical body with an internal space. More specifically, the advancing / retreating member accommodating section 21 is configured as a cylindrical body having a second cam surface Cb and a guide section Cc, which will be described later. The locking member accommodating section 22 accommodates the locking member 5 so that the locking member 5 can move between a locked position and an unlocked position. In this embodiment, the locking member accommodating section 22 accommodates the locking body 51 of the locking member 5 and the motor 521 and screw shaft 522 of the drive section 52.

[0022] 5, in this embodiment, the case 2 has a cylindrical support portion 24 that protrudes from a bottom surface 2a that faces the end of the advancing / retreating member 3 on the retreating direction D2 side in the axial X direction, and a protruding portion 23 that protrudes in the axial X direction from the end of the cylindrical support portion 24 opposite the bottom surface 2a and has a first cam surface Ca, which will be described later. In this embodiment, the support portion 24 is formed in a hollow cylindrical shape that extends coaxially with the axis X of the advancing / retreating member 3, and a part of the biasing member 4 is housed in the space inside the support portion 24. A plurality of protruding portions 23 (four in this embodiment) are provided and spaced apart around the axis X. The protruding portion 23 has a first cam surface Ca, which will be described later, at the end of the protruding portion 23 on the advancing direction D1 side in the axial X direction.

[0023] The advancing / retreating member 3 is a member that advances and retreats in the direction of axis X relative to the case 2. In this embodiment, the advancing / retreating member 3 is moved in a forward direction D1 by a cam mechanism C and held at an advanced holding position (see FIG. 1), and is moved in a backward direction D2 from the advanced holding position and held at a backward holding position (see FIG. 2). As shown in FIGS. 8 to 16, when the advancing / retreating member 3 moves between the advanced holding position and the backward holding position, it is configured to pass through a turning position (see FIGS. 9, 11, and 14) that is further toward the backward holding position in the backward direction D2 and rotated a predetermined angle around the axis X from the backward holding position. When advancing and retreating in the direction of axis X, the advancing / retreating member 3 moves while rotating around the axis X by the cam mechanism C. Specifically, the advancing / retreating member 3 is configured to rotate around the axis X by the cam mechanism C when moving between the backward holding position and the turning position.

[0024] In this specification, the "forward holding position" refers to a predetermined position of the advancing / retreating member 3 where the advancing / retreating member 3 is moved in the forward direction D1 relative to the rearward holding position and is held there. In this embodiment, the forward holding position is the position of the advancing / retreating member 3 when the fuel lid L is in an open state, and is the position where the advancing / retreating member 3 protrudes most from the case 2 in the forward direction D1. The "rearward holding position" refers to a predetermined position of the advancing / retreating member 3 where the advancing / retreating member 3 is moved in the rearward direction D2 relative to the forward holding position and is held there. In this embodiment, the rearward holding position is the position of the advancing / retreating member 3 when the fuel lid L is in a closed state. In this embodiment, the rearward holding position is a position slightly toward the forward direction D1 relative to the turned-back position. Note that in this embodiment, the rearward holding position of the advancing / retreating member 3 is a position rotated 90° around the axis X relative to the forward holding position. The "rearward holding position" is a position further toward the rearward direction D2 relative to the rearward holding position. The turn-back position is a position rotated a predetermined angle in one direction D3 around the axis X with respect to the retracted holding position, and is located between the advanced holding position and the retracted holding position in the direction around the axis X. In this embodiment, the turn-back position is a position in the axis X direction where the advancing / retreating member 3 switches its traveling direction from the retracted direction D2 to the advanced direction D1 when the cam mechanism C moves the advancing / retreating member 3 from the advanced holding position to the retracted holding position, or when the advancing / retreating member 3 moves from the retracted holding position to the advanced holding position. Note that the position in the axis X direction of the turn-back position (first turn-back position; see FIG. 9 ) where the traveling direction is changed when the advancing / retreating member 3 moves from the advanced holding position to the retracted holding position may be different from the position in the axis X direction of the turn-back position (second turn-back position; see FIG. 11 ) where the traveling direction is changed when the advancing / retreating member 3 moves from the retracted holding position to the advanced holding position.

[0025] As described above, the advancing / retreating member 3 interacts with a predetermined operation target when it advances or retreats in the direction of axis X. In this embodiment, when the advancing / retreating member 3 moves to the forward holding position, it disengages from the fuel lid L, putting the fuel lid L in an open state, and when it moves to the backward holding position, it engages with the fuel lid L, putting the fuel lid L in a closed state. In this embodiment, as shown in FIG. 5 , the advancing / retreating member 3 is configured to move from the backward holding position to the forward holding position by being biased in the forward direction D1 by a biasing member 4 such as a coil spring. Conversely, the advancing / retreating member 3 moves from the forward holding position to the backward holding position by being pressed against the biasing force of the biasing member 4 in the forward direction D1.

[0026] 5, in this embodiment, the advancing / retreating member 3 includes a main body 32 extending along the direction of the axis X, and a locking portion 31 provided on one end (tip) side of the main body 32 in the direction of the axis X. The advancing / retreating member 3 also has a guided portion Cd on the outer peripheral side surface of the advancing / retreating member 3 around the axis X.

[0027] In this embodiment, the main body 32 is a tubular or columnar member extending in the direction of the axis X, as shown in Fig. 5. More specifically, the main body 32 is formed in a cylindrical shape, and is guided into the advancing / retreating member accommodating portion 21 having a cylindrical internal space, as shown in Fig. 6. The main body 32 also has a biasing member accommodating portion (not shown) inside the main body 32, and a portion of the biasing member 4 is accommodated in the biasing member accommodating portion.

[0028] The locking portion 31 is provided on one end side (the forward direction D1 side) of the main body 32 and locks with an operation target such as the fuel lid L. In this embodiment, the locking portion 31 locks with an operation target-side locked portion La as shown in FIG. 3. The locking portion 31 moves between an locked state (see solid line in FIG. 3) in which it is locked with the operation target-side locked portion La and an unlocked state (see dashed line in FIG. 3) in which it is released from the lock as a result of the cam mechanism C rotating the advancing / retreating member 3 around the axis X. In this embodiment, the locking portion 31 is a substantially rectangular plate-like member provided on the end of the main body 32 on the forward direction D1 side, outside the case 2. The shapes and structures of the locking portion 31 and the operation target-side locked portion La are not particularly limited as long as the locking portion 31 can be placed in an locked state and an unlocked state with respect to the operation target-side locked portion La and the fuel lid L can be opened and closed.

[0029] The cam mechanism C moves the advancing / retreating member 3 between an advanced holding position, a turned-back position, and a retracted holding position, and holds the advancing / retreating member 3 at the advanced holding position and the retracted holding position. When moving the advancing / retreating member 3 between the advanced holding position and the retracted holding position, the cam mechanism C guides the advancing / retreating member 3 so that the advancing / retreating member 3 is further in the retracted direction D2 relative to the retracted holding position and passes through a turned-back position rotated a predetermined angle around the axis X relative to the retracted holding position. More specifically, as shown in FIGS. 8 to 10 , when moving the advancing / retreating member 3 from the advanced holding position to the retracted holding position, the cam mechanism C is configured to move the advancing / retreating member 3 from the turned-back position to the retracted holding position by the biasing member 4 after the advancing / retreating member 3 reaches the turned-back position and hold it there. 10 to 12, when moving the advancing / retreating member 3 from the retracted holding position to the advanced holding position, the cam mechanism C is configured so that after the advancing / retreating member 3 reaches the turned-back position from the retracted holding position, the biasing member 4 moves the advancing / retreating member 3 from the turned-back position to the advanced holding position and holds it there. Note that, for ease of understanding, FIGS. 8 to 16 are schematic diagrams in which the advancing / retreating member 3 and the cam mechanism C are developed on a plane, and the up and down directions in FIGS. 8 to 16 are the directions of the axis X (the up direction is the forward direction D1, and the down direction is the retracted direction D2), and the left direction is one direction D3 around the axis X.

[0030] The cam mechanism C rotates the advancing / retreating member 3 about the axis X when the advancing / retreating member 3 moves from the forward holding position to the rearward holding position and when the advancing / retreating member 3 moves from the rearward holding position to the forward holding position. More specifically, the advancing / retreating member 3 rotates in one direction D3 about the axis X by the cam mechanism C when moving from the forward holding position to the rearward holding position, and also rotates in one direction D3 (the same direction) about the axis X by the cam mechanism C when moving from the rearward holding position to the forward holding position. The angle by which the advancing / retreating member 3 rotates from a state held at the forward holding position to a state held at the rearward holding position, or from a state held at the rearward holding position to a state held at the forward holding position, is not particularly limited. In this embodiment, the advancing / retreating member 3 is configured to rotate approximately 90° when the advancing / retreating member 3 changes from a state held at the rearward holding position to a state held at the forward holding position. Similarly, the advancing / retreating member 3 is configured to rotate approximately 90° from a state where it is held at the advanced holding position to a state where it is held at the retreated holding position.

[0031] The structure of the cam mechanism C is not particularly limited as long as it can move the advancing / retreating member 3 between an advanced holding position, a turned-back position, and a retracted holding position and hold the advancing / retreating member 3 at the advanced holding position and the retracted holding position. In this embodiment, as shown in FIGS. 8 to 16 , the cam mechanism C includes a first cam surface Ca provided on the case 2, a second cam surface Cb provided on the case 2, a guide portion Cc provided on the case 2 and extending along the axial direction X of the advancing / retreating member 3, and a guided portion Cd provided on the outer periphery of the advancing / retreating member 3, which has a first contact surface Cd1 that contacts the first cam surface Ca and a second contact surface Cd2 that contacts the second cam surface Cb and can be guided by the guide portion Cc. Note that in this specification, when a certain member or part is said to be "provided on the case 2," this means that the certain member or part may be provided integrally with another part of the case 2 or may be provided separately from another part of the case 2. When a certain component or part is provided separately from another part of case 2, it may be fixed to another part of case 2 or may be movable relative to another part of case 2, as long as the object of the invention can be achieved.

[0032] 9 and 11 , the first cam surface Ca is inclined so that when the advancing / retreating member 3 moves in the backward direction D2 to the turning back position, the first cam surface Ca comes into contact with the first contact surface Cd1 of the guided portion Cd, causing the advancing / retreating member 3 to rotate in one direction D3 about the axis X. The first cam surface Ca is inclined so that when the advancing / retreating member 3 attempts to move further in the backward direction D2 (by being pressed) while in contact with the first contact surface Cd1, a force is generated that rotates the advancing / retreating member 3 in the one direction D3 about the axis X. The inclination angle of the first cam surface Ca is not particularly limited as long as it is an inclination angle that generates a force that rotates the advancing / retreating member 3 in the one direction D3 about the axis X when the advancing / retreating member 3 attempts to move further in the backward direction D2 (by being pressed) while the first cam surface Ca and the first contact surface Cd1 are in contact.

[0033] In this embodiment, the first cam surface Ca is provided on the case 2. More specifically, as shown in FIG. 5, the first cam surface Ca is formed by the end (upper end) of the protrusion 23 provided on the case 2 on the forward direction D1 side. In this embodiment, four protrusions 23 are provided at equal intervals around the axis X, and a first cam surface Ca is provided on each of the four protrusions 23. In addition, as shown in FIG. 8, one of the first cam surfaces Ca is provided at a position corresponding to the position of the guided portion Cd in the direction around the axis X when the advancing / retreating member 3 is held at the forward holding position. In addition, as shown in FIG. 10, in this embodiment, the other of the first cam surfaces Ca is provided at a position corresponding to the position of the guided portion Cd in the direction around the axis X when the advancing / retreating member 3 is held at the rearward holding position. Therefore, when the advancing / retreating member 3 moves in the rearward direction D2 from the forward holding position or the rearward holding position, the first cam surface Ca can be reliably brought into contact with the first contact surface Cd1 of the guided portion Cd.

[0034] As shown in Fig. 9 , when the advancing / retreating member 3 moves from the turned-back position to the forward holding position via the turned-back position and is held at the backward holding position, the second cam surface Cb comes into contact with the second contact surface Cd2 of the guided portion Cd and rotates the advancing / retreating member 3 in one direction D3 about the axis X when the advancing / retreating member 3 moves from the turned-back position in the forward direction D1. As shown in Figs. 9 and 10 , the second cam surface Cb is inclined so that when the advancing / retreating member 3 attempts to move further in the forward direction D1 (by the biasing force of the biasing member 4) in a state in which the second cam surface Cb is in contact with the second contact surface Cd2, a force is generated that rotates the advancing / retreating member 3 in one direction D3 about the axis X. The inclination angle of the second cam surface Cb is not particularly limited as long as it is an inclination angle that generates a force that rotates the advancing / retreating member 3 in one direction D3 about the axis X when the advancing / retreating member 3 attempts to move further in the forward direction D1 in a state in which the second cam surface Cb and the second contact surface Cd2 are in contact.

[0035] In this embodiment, the second cam surface Cb is provided on the case 2. More specifically, the second cam surface Cb is provided on the advancing / retreating member accommodating portion 21 of the case 2. In this embodiment, the second cam surface Cb is configured as an inclined surface (an inclined surface at the end on the retreating direction D2 side) provided on the advancing / retreating member accommodating portion 21 formed of a cylindrical body. In this embodiment, two second cam surfaces Cb (see FIGS. 8 to 16) are provided on the inner peripheral surface of the advancing / retreating member accommodating portion 21, spaced apart in a direction around the axis X. The second cam surface Cb has a stop portion ST (see FIG. 8) at an end on the one direction D3 side in the direction around the axis X (the end on the left side of the second cam surface Cb in FIG. 8) that stops the guided portion Cd moving in the one direction D3 along the second cam surface Cb at a predetermined position (a retreating holding position). The shape and structure of the stop portion ST are not particularly limited as long as it can stop the guided portion Cd at the predetermined position (a retreating holding position). In this embodiment, the stop portion ST is formed by an inclined surface (a guide surface Gu described later) that is inclined in the opposite direction to the inclined surface of the second cam surface Cb. The stop portion ST may be formed by a wall portion that extends in the retreating direction D2 relative to the inclined surface of the second cam surface Cb (see FIG. 17).

[0036] The guide portion Cc guides the guided portion Cd of the advancing / retreating member 3 in the direction of axis X. The guide portion Cc extends in the direction of axis X, and guides the guided portion Cd in the direction of axis X when the advancing / retreating member 3 moves in the backward direction D2 from the forward holding position, or when the advancing / retreating member 3 moves in the forward direction D1 toward the forward holding position, thereby helping the advancing / retreating member 3 to move smoothly in the direction of axis X.

[0037] In this embodiment, the guide portion Cc is provided in the case 2. More specifically, the guide portion Cc is provided in the advancing / retreating member accommodating portion 21 of the case 2. In this embodiment, the guide portion Cc is configured as a guide groove provided with a predetermined width in the axial direction of the X axis on the inner circumferential surface of the advancing / retreating member accommodating portion 21, which is configured as a cylindrical body. The width of the guide portion Cc (the distance between a pair of side edges extending in the axial direction of the X axis) is larger than the width of the guided portion Cd in the axial direction of the X axis so that the guided portion Cd can be guided within the guide portion Cc. The end of the guide portion Cc on the forward direction D1 side has a stop portion ST2 (see FIG. 8) that can come into contact with the guided portion Cd. When the stop portion ST2 comes into contact with the second contact surface Cd2 of the guided portion Cd, the advancing / retreating member 3 is stopped and held at the forward holding position. The end of the guide portion Cc on the backward direction D2 side is open, allowing the guided portion Cd to move in the backward direction D2 from the inside of the guide portion Cc toward the first cam surface Ca, and in the forward direction D1 from the backward direction D2 side of the guide portion Cc toward the inside of the guide portion Cc.

[0038] The cam mechanism C also has an introduction portion Ce that guides the guided portion Cd to the guide portion Cc when the advancing / retreating member 3 moves from the retracted holding position via the turned-back position to the advanced holding position (see FIGS. 10 to 12). The introduction portion Ce is inclined so that when the advancing / retreating member 3 attempts to move further in the forward direction D1 (due to the biasing force of the biasing member 4) while in contact with the second contact surface Cd2 of the guided portion Cd, a force is generated that rotates the advancing / retreating member 3 in one direction D3 about the axis X. The inclination angle of the introduction portion Ce is not particularly limited, as long as it is an inclination angle that generates a force that rotates the advancing / retreating member 3 in one direction D3 about the axis X when the advancing / retreating member 3 attempts to move further in the forward direction D1 while in contact with the second contact surface Cd2.

[0039] In this embodiment, the introduction portion Ce is provided in the case 2. More specifically, the introduction portion Ce is provided in the advancing / retreating member accommodating portion 21 of the case 2. In this embodiment, the introduction portion Ce is configured by an inclined surface provided in the advancing / retreating member accommodating portion 21 configured as a cylindrical body. In this embodiment, as shown in FIG. 8, two introduction portions Ce are provided spaced apart in the direction around the axis X. In this embodiment, the introduction portion Ce is provided adjacent to the second cam surface Cb with the stop portion ST therebetween in the direction around the axis X. In addition, the introduction portion Ce is provided between the guide portion Cc and the second cam surface Cb in the direction around the axis X.

[0040] The guided portion Cd is provided on the advancing / retreating member 3. As shown in FIGS. 8 to 12, the guided portion Cd is guided by the first cam surface Ca, the second cam surface Cb, the guide portion Cc, etc., thereby moving the advancing / retreating member 3 to the forward holding position, the backward holding position, and the return position. In this embodiment, as shown in FIGS. 5 and 6, the guided portion Cd is provided on the outer periphery of the advancing / retreating member 3. More specifically, the guided portion Cd is provided to protrude from a side surface of the main body 32 of the advancing / retreating member 3 that extends in the direction around the axis X. The guided portion Cd has a first contact surface Cd1 that contacts the first cam surface Ca and a second contact surface Cd2 that contacts the second cam surface Cb. The guided portion Cd also has a contact portion CT, which will be described later. In this embodiment, the guided portion Cd has a pair of opposing side edges that face a pair of side edges of the guide portion Cc and extend in the direction of the axis X. The opposing side edges on one side D3 around the axis X constitute the contact portion CT. The pair of opposing side edges are slidable relative to the pair of side edges of the guide portion Cc when the guided portion Cd of the advancing / retreating member 3 is guided by the guide portion Cc. In this embodiment, the guided portion Cd has an inclined surface Cd3 at the end of the outer periphery on the forward direction D1 side between the second contact surface Cd2 and the contact portion CT around the axis X. As described below, the inclined surface Cd3 is inclined in the opposite direction to the introducing portion Ce. In this embodiment, the inclined surface Cd3 is inclined in the opposite direction to the second contact surface Cd2. In this embodiment, the inclined surface Cd3 has an inclination angle corresponding to the inclination angle of the guide surface Gu, which will be described later. The inclined surface Cd3 will be described later. In this embodiment, an inclined surface Cd4 is provided between the first contact surface Cd1 and the abutment portion CT in the direction around the axis X at the end of the outer periphery of the guided portion Cd on the retreating direction D2 side.

[0041] In this embodiment, the guided portion Cd is formed in a hexagonal shape as shown in Figure 8, but the shape of the guided portion Cd is not particularly limited as long as the guided portion Cd can be guided by the first cam surface Ca, the second cam surface Cb, the guide portion Cc, etc., and the advancing / retreating member 3 can move to the forward holding position, the backward holding position, and the turned-back position.

[0042] The first contact surface Cd1 is a surface that comes into contact with the first cam surface Ca when the advancing / retreating member 3 moves in the retraction direction D2. As shown in FIG. 9 , when the first contact surface Cd1 is in contact with the first cam surface Ca, the advancing / retreating member 3 further moves in the retraction direction D2, causing the advancing / retreating member 3 to rotate in one direction D3 about the axis X. The shape and structure of the first contact surface Cd1 are not particularly limited as long as the advancing / retreating member 3 can be rotated in one direction D3 about the axis X by further moving in the retraction direction D2 while in contact with the first cam surface Ca. In this embodiment, the first contact surface Cd1 is inclined in the same direction at an angle corresponding to the inclination angle of the first cam surface Ca.

[0043] The second contact surface Cd2 comes into contact with the second cam surface Cb when the advancing / retreating member 3 moves in the forward direction D1 from the turned-back position when moving from the forward holding position to the retracted holding position. In this embodiment, the second contact surface Cd2 comes into contact with the introduction portion Ce when the advancing / retreating member 3 moves in the forward direction D1 from the turned-back position when moving from the retracted holding position to the forward holding position. As shown in FIGS. 11 and 12 , when the second contact surface Cd2 is in contact with the second cam surface Cb or the introduction portion Ce, the advancing / retreating member 3 further moves in the forward direction D1, causing the advancing / retreating member 3 to rotate in one direction D3 about the axis X. The shape and structure of the second contact surface Cd2 are not particularly limited as long as the advancing / retreating member 3 can be rotated in one direction D3 about the axis X when the advancing / retreating member 3 further moves in the forward direction D1 when in contact with the second cam surface Cb or the introduction portion Ce. In this embodiment, the second contact surface Cd2 is inclined in the same direction at an angle corresponding to the inclination angles of the second cam surface Cb and the introduction portion Ce.

[0044] When the locking member 5 is located at the locked position, it restricts the movement of the advancing / retreating member 3 from the retracted holding position to the advanced holding position (see FIG. 16). More specifically, the locking member 5 restricts the movement of the advancing / retreating member 3 from the retracted holding position to the advanced holding position by restricting the rotation of the advancing / retreating member 3 from the retracted holding position to the turned-back position in the direction around the axis X, as will be described in detail later.

[0045] As described above, the locking member 5 moves between a locked position (see the two-dot chain lines in FIGS. 6 and 7) and an unlocked position (see the solid lines in FIGS. 6 and 7). The locked position of the locking member 5 is a position where, when the advancing / retreating member 3 is located at the retracted holding position, the locking member 5 can restrict movement of the advancing / retreating member 3 to the advanced holding position. More specifically, the locked position is a position where, when a force is applied to the advancing / retreating member 3 to rotate the advancing / retreating member 3 in one direction D3 about the axis X from the retracted holding position toward the turned-back position, the locking member 5 can block rotation of the advancing / retreating member 3 in one direction D3 about the axis X so that the advancing / retreating member 3 cannot reach the turned-back position from the retracted holding position (see FIG. 16). When the locking member 5 is in the locked position, the tip of the locking member 5 is located radially outward from the outer surface of the main body 32 of the advancing / retreating member 3 and is arranged to face the abutting portion CT of the guided portion Cd in the direction around the axis X (the tip of the locking member 5 does not penetrate the outer surface of the main body 32, and the movement of the advancing / retreating member 3 is not restricted by the locking member 5 except in one direction D3 around the axis X). As shown in FIGS. 7 and 13 to 16, the locking member 5 has an abutted portion 5a that can abut against the abutting portion CT of the advancing / retreating member 3. The abutted portion 5a abuts against the abutting portion CT of the advancing / retreating member 3 and restricts the rotation of the advancing / retreating member 3 in one direction D3 around the axis X.

[0046] The shape and structure of the contact portion 5a are not particularly limited as long as it can contact the contact portion CT of the advancing / retreating member 3 and restrict rotation of the advancing / retreating member 3 in one direction D3 around the axis X. In this embodiment, the contact portion 5a is provided as an opposing surface that faces the contact portion CT in the direction around the axis X. The contact portion 5a is configured to make surface contact with the contact portion CT, which is configured as a surface. However, the contact portion CT and the contact portion 5a may be configured to make point contact or line contact as long as it can restrict rotation of the advancing / retreating member 3 in one direction D3 around the axis X. Therefore, the contact portion CT and the contact portion 5a may be flat, curved, or have other shapes. The unlocked position is a position where the locking member 5 is released from the movement trajectory of the advancing / retreating member 3 between the forward holding position and the backward holding position, allowing the advancing / retreating member 3 to move to the forward holding position.

[0047] In this embodiment, as shown in Figures 6 and 7, the locking member 5 moves from a direction perpendicular to the axis X to a direction approaching the axis X, moving from the unlocked position (see the solid line in Figures 6 and 7) to the locked position (see the two-dot chain line in Figures 6 and 7). However, the direction of movement of the locking member 5 is not particularly limited as long as it is movable between the locked and unlocked positions. For example, the locking member 5 may move in the direction of the axis X from the unlocked position to the locked position (for example, the locking member 5 may move from the unlocked position in the forward direction D1 (from bottom to top in Figure 6) to reach the locked position).

[0048] The shape and structure of the locking member 5 are not particularly limited as long as it can move between the locked position and the unlocked position. In this embodiment, as shown in Figures 6 and 7, the locking member 5 has a locking body 51 that can come into contact with the advancing / retracting member 3, and a driving part 52 that moves the locking body 51 to the locked position and the unlocked position.

[0049] When the lock body 51 is in the locked position, it comes into contact with the contact portion CT of the advancing / retreating member 3, thereby limiting the rotation of the advancing / retreating member 3 in one direction D3 about the axis X to a predetermined range and preventing the advancing / retreating member 3 from reaching the folded-back position. As shown in Figures 6 and 7, the lock body 51 has an abutted portion 5a that faces the contact portion CT of the advancing / retreating member 3 in the direction about the axis X when it is in the locked position.

[0050] The shape and structure of the lock body 51 are not particularly limited as long as it can abut against the abutment portion CT of the advancing / retreating member 3, thereby limiting the rotation of the advancing / retreating member 3 in one direction D3 about the axis X to a predetermined range and preventing the advancing / retreating member 3 from reaching the turning position. In this embodiment, as shown in FIGS. 6 and 7 , the lock body 51 has a driven portion 511 driven by the driving unit 52 and an extension portion 512 extending from the driven portion 511 and having an abutment portion 5a. In this embodiment, the driven portion 511 has a female thread portion that screws onto the outer periphery of the screw shaft 522 of the driving unit 52. When the screw shaft 522 rotates about its axis, the driven portion 511 is restricted from rotating together with the screw shaft 522. As a result, when the screw shaft 522 rotates about its axis, the lock body 51 including the driven portion 511 moves in the axial direction of the screw shaft 522 depending on the rotation direction of the screw shaft 522. This allows the lock body 51 to move between the locked position and the unlocked position. The shape of the extension portion 512 is not particularly limited, but in this embodiment, it extends linearly from the driven portion 511 in the axial direction of the screw shaft 522. The contact portion 5a is provided as a flat surface at the tip of the extension portion 512 that faces the contact portion CT of the advancing / retreating member 3 in the direction around the axis X. When the locking member 5 is in the locked position, the locking member 5 (lock body 51) is positioned on the retraction direction D2 side of the introduction portion Ce and spaced apart from the introduction portion Ce, as shown in FIG. 13 . The gap between the locking member 5 (lock body 51) and the introduction portion Ce is set to a size that prevents the guided portion Cd, which is guided along the introduction portion Ce, from passing through the gap.

[0051] The drive unit 52 moves the lock body 51 to the locked position and the unlocked position. The structure of the drive unit 52 is not particularly limited as long as it can move the lock body 51 to the locked position and the unlocked position. In this embodiment, the drive unit 52 is an electric drive unit, but it may also be a manual drive unit.

[0052] In this embodiment, as shown in FIGS. 6 and 7 , the drive unit 52 includes a motor 521 that can rotate forward and backward, and a screw shaft 522 that rotates by the drive force of the motor 521. The screw shaft 522 is a shaft member having a male thread formed on its outer periphery. As described above, the screw shaft 522 is threadedly engaged with a female thread provided on the driven portion 511 of the lock body 51. When the screw shaft 522 rotates in one direction by the drive force of the motor 521, the lock body 51, whose rotation together with the screw shaft 522 is restricted, moves along the axial direction of the screw shaft 522 toward the locked position (from the position indicated by the solid line in FIGS. 6 and 7 toward the position indicated by the two-dot chain line). When the screw shaft 522 rotates in the other direction by the drive force of the motor 521, the lock body 51 moves along the axial direction of the screw shaft 522 toward the unlocked position (from the position indicated by the two-dot chain line in FIGS. 6 and 7 toward the position indicated by the solid line). This allows the lock body 51 to move to the locked position and the unlocked position.

[0053] Next, the reciprocating member 3 will be described in more detail.

[0054] 5 and 8 to 16, the advancing / retreating member 3 has a contact portion CT that can come into contact with the contacted portion 5a of the locking member 5 in the locked position in the direction around the axis X when a force is applied to the advancing / retreating member 3 in a direction rotating the advancing / retreating member 3 in one direction D3 around the axis X from the retracted holding position toward the folded-back position. The contact portion CT comes into contact with the contacted portion 5a of the locking member 5, thereby restricting the rotation of the advancing / retreating member 3 in the one direction D3 around the axis X. This restricts the advancing / retreating member 3 from the retracted holding position to the advanced holding position.

[0055] In this embodiment, as shown in FIGS. 8 to 16, the contact portion CT is an end portion (opposing side edge) of the guided portion Cd on one side in one direction D3 around the axis X. When the advancing / retreating member 3 is in the retracted holding position and a force is applied in a direction that rotates the advancing / retreating member 3 in one direction D3 around the axis X, the contact portion CT comes into contact with the contacted portion 5a of the locking member 5 that is in the locked position (see FIG. 16). Note that in this embodiment, when the advancing / retreating member 3 is held in the retracted holding position, the distance G1 (see FIG. 15) between the contact portion CT and the contacted portion 5a in the direction around the axis X is set to a distance that prevents the advancing / retreating member 3 from reaching the turned-back position from the retracted holding position. In this case, as will be described later, the advancing / retreating member 3 cannot reach the turned-back position, and movement of the advancing / retreating member 3 from the retracted holding position is reliably restricted.

[0056] In this embodiment, the contact portion CT is provided on the guided portion Cd, but it may be provided on a portion other than the guided portion Cd as long as it can come into contact with the contact portion 5a of the locking member 5 in the direction around the axis X and restrict rotation of the advancing / retreating member 3 in one direction D3 in the direction around the axis X. For example, it is also possible to provide a contact portion on the advancing / retreating member 3 in a portion other than the guided portion Cd (for example, the lower end of the advancing / retreating member 3), and position the contact portion 5a of the locking member 5 at a position where it can come into contact with that contact portion.

[0057] In this embodiment, as shown in Figures 13 to 15, when the locking member 5 is in the locked position, the abutted portion 5a and the abutting portion CT are positioned in a positional relationship such that the abutted portion 5a does not abut against the abutting portion CT of the advancing / retreating member 3 until the advancing / retreating member 3 moves from the forward holding position via the folded-back position to the backward holding position.

[0058] Here, the phrase "a positional relationship in which the contacted portion 5a does not contact the contact portion CT of the advancing / retreating member 3 until the advancing / retreating member 3 moves from the advancing / retreating position via the turned-back position to the retracted / retreating position" refers to a positional relationship in which the advancing / retreating member 3 can move from the advancing / retreating position via the turned-back position to the retracted / retreating position without the contacted portion 5a contacting the contact portion CT. Therefore, in this embodiment, even when the locking member 5 is in the locked position, the locking member 5 is positioned so as not to impede the movement of the advancing / retreating member 3 in the forward direction D1 and the backward direction D2 and the rotation about the axis X until the contacted portion 5a contacts the contact portion CT about the axis X. In this way, even when the locking member 5 is in the locked position, the movement of the advancing / retreating member 3 is not impeded. Therefore, the locking member 5 can be moved from the unlocked position to the locked position whether the advancing / retreating member 3 is in the advancing / retreating position or the retracted / retreating position. Therefore, the locking member 5 can be moved to the locked position regardless of the position of the advancing / retreating member 3 in the axis X direction.

[0059] 13, after the locking member 5 is moved to the locked position when the advancing / retreating member 3 is in the advanced holding position, the movement of the advancing / retreating member 3 to the retracted holding position is not hindered by the locking member 5, which is in the locked position. Therefore, even if the locking member 5 is moved to the locked position when the advancing / retreating member 3 is in the advanced holding position, the advancing / retreating member 3 can move to the retracted holding position as shown in FIGS. 13 to 15, and at the point when the advancing / retreating member 3 moves to the retracted holding position, the locking of the advancing / retreating member 3 by the locking member 5 is completed. Therefore, unlike conventional devices in which the locking operation by the locking member cannot be performed when the advancing / retreating member is in the advanced holding position and the locking operation can only be performed after the advancing / retreating member is moved to the retracted holding position, the advancing / retreating movement device 1 of this embodiment can easily lock the advancing / retreating member 3.

[0060] 15 and 16 , when the locking member 5 is in the locked position, the abutted portion 5a and the abutting portion CT are positioned in a positional relationship such that when a force acts on the advancing / retreating member 3 in a direction causing it to move in the rearward direction D2 from the rearward holding position and rotate about the axis X, the abutted portion 5a faces the abutting portion CT in the direction about the axis X and limits the rotation of the advancing / retreating member 3 about the axis X to a predetermined range, so that the advancing / retreating member 3 does not move to the rearward holding position. Here, "when a force acts on the advancing / retreating member 3 in a direction causing it to move in the rearward direction D2 from the rearward holding position and rotate about the axis X" refers to a force acting on the advancing / retreating member 3 in a direction causing it to rotate about the axis X from the rearward holding position toward the turned-back position (one direction D3), regardless of whether the advancing / retreating member 3 actually rotates about the axis X. In this embodiment, when the advancing / retreating member 3 moves in the backward direction D2 from the rearward holding position and the first contact surface Cd1 of the guided portion Cd abuts against the first cam surface Ca, and a force is further applied in the rearward direction D2, a force acts to rotate the advancing / retreating member 3 in a direction around the axis X.

[0061] As described above, when the locking member 5 is in the locked position, the abutted portion 5a and the abutting portion CT are positioned in a positional relationship such that the abutted portion 5a faces the abutting portion CT about the axis X, limiting the rotation of the advancing / retreating member 3 about the axis X to a predetermined range so that the advancing / retreating member 3 does not move to the advanced holding position. As a result, even if a force acting to rotate the advancing / retreating member 3 about the axis X acts on the advancing / retreating member 3 when the locking member 5 is in the locked position and the advancing / retreating member 3 is in the retracted holding position, the abutted portion 5a and the abutting portion CT abut on each other about the axis X, and the rotation of the advancing / retreating member 3 about the axis X is limited to a predetermined range of rotation that prevents the advancing / retreating member 3 from moving to the advanced holding position. Therefore, the advancing / retreating member 3 cannot move from the retracted holding position to the advanced holding position, and the locking member 5 can lock the advancing / retreating member 3 at the retracted holding position. The rotation angle of the advancing / retreating member 3 within the predetermined range until the abutted portion 5a and the abutting portion CT abut is not particularly limited as long as it is an angle that prevents the advancing / retreating member 3 from moving to the advanced holding position. In this embodiment, when the advancing / retreating member 3 is held at the retracted holding position, the distance G1 (see FIG. 15) around the axis X between the abutting portion CT and the abutted portion 5a is set to a distance that prevents the advancing / retreating member 3 from reaching the turned-back position from the retracted holding position. This prevents the advancing / retreating member 3 from rotating to the turned-back position, more reliably preventing the advancing / retreating member 3 from moving to the advanced holding position.

[0062] Furthermore, when the locking member 5 is in the locked position, it moves so as to be positioned on the rotation trajectory of the guided portion Cd (in this embodiment, it moves in a direction perpendicular to the axis X of the advancing / retreating member 3), and receives a rotational force around the axis X from the contact portion CT of the advancing / retreating member 3 (see FIG. 7). Therefore, in order to more reliably lock the advancing / retreating member 3 in the retracted holding position by the locking member 5, it is preferable to suppress movement of the locking member 5 in a direction away from the contact portion CT (downward in FIG. 7, leftward in FIG. 16) due to bending of the locking member 5 or backlash between the locking member 5 and a member to which the locking member 5 is connected (for example, the drive unit 52, etc.). Therefore, as shown in the modified example in FIG. 19 , when the advancing / retreating member 3 rotates about the axis X and a rotational force F about the axis X is applied from the abutment portion CT provided on the guided portion Cd to the abutted portion 5a of the locking member 5, the abutted portion 5a and the abutment portion CT may be configured to engage with each other so that a force F1 acts in a direction that moves the locking member 5 toward the advancing / retreating member 3 due to the rotational force F. In this case, as shown in FIG. 19 , the rotational force F applied from the abutment portion CT to the abutted portion 5a can be decomposed into forces (components) F1 and F2. Therefore, a force F2 smaller than the rotational force F is applied to the locking member 5, and a force F1 in a direction that moves the locking member 5 toward the axis X is also applied. Therefore, the force that moves the locking member 5 away from the abutment portion CT is reduced, and the locking member 5 is also subjected to a force F1 that attracts it toward the axis X, increasing the engagement force between the abutted portion 5a and the abutment portion CT. This prevents the locking member 5 from escaping in the direction in which the engagement between the locking member 5 and the guided portion Cd is released (downward in FIG. 19), which prevents the advancing / retreating member 3 from rotating around the axis X. Therefore, the advancing / retreating member 3 is more reliably locked by the locking member 5 at the retracted holding position.

[0063] 19 , the shapes and structures of the contact portion CT and the contacted portion 5a are not limited to the embodiment shown in FIG. 19 , as long as the contacted portion 5a and the contact portion CT are engaged with each other so that, when a rotational force F is applied from the contact portion CT to the contacted portion 5a, a force F1 acts in the direction in which the locking member 5 approaches the advancing / retracting member 3. In the modified example shown in FIG. 19 , the contacted portion 5a is configured by a surface that extends along a line LN connecting the contact point where the contacted portion 5a and the contact portion CT come into contact with the axis X of the advancing / retracting member 3, and is configured so that the contacted portion 5a and the contact portion CT are in surface contact. The surface contact between the contacted portion 5a and the contact portion CT results in more stable engagement between the contacted portion 5a and the contact portion CT, and the locking member 5 is stably attracted in the direction in which it approaches the axis X, thereby further increasing the engagement force between the contacted portion 5a and the contact portion CT. In addition, "extending along the line LN connecting the point of contact where the abutted portion 5a and the abutting portion CT abut and the axis X of the advancing / retreating member 3" includes not only a state in which the abutted portion 5a extends in the same direction as the line LN, but also a state in which it extends at a slight incline relative to the line LN (for example, a state in which it is slightly inclined within a range of 10°).

[0064] The contacted portion 5a and the contact portion CT may be configured to be in point contact or line contact, so long as they are engaged such that when a rotational force F is applied from the contact portion CT to the contacted portion 5a, a force F1 acts in the direction in which the locking member 5 approaches the advancing / retreating member 3. Also, so long as the contacted portion 5a and the contact portion CT are engaged such that when a rotational force F is applied from the contact portion CT to the contacted portion 5a, a force F1 acts in the direction in which the locking member 5 approaches the advancing / retreating member 3, the contacted portion 5a does not need to extend along the above-mentioned line LN, and may be inclined at a predetermined angle with respect to the line LN.

[0065] In this embodiment, as shown in FIG. 18 , the guided portion Cd has an inclined surface Cd3 inclined in the opposite direction to the introduction portion Ce so that the second contact surface Cd2 of the guided portion Cd is not guided by the introduction portion Ce when the first contact surface Cd1 of the guided portion Cd contacts the first cam surface Ca and the abutment portion CT and the abutted portion 5a abut against each other around the axis X and the guided portion Cd moves in the forward direction D1 due to the biasing force of the biasing member 4. With this inclined surface Cd3, the advancing / retreating member 3 can return to the retracted holding position even if the advancing / retreating member 3 rotates to a position where the guided portion Cd overlaps with the introduction portion Ce around the axis X, as shown in FIGS. 16 and 18 . Therefore, as shown in FIG. 17 , it is possible to prevent the guided portion Cd of the advancing / retreating member 3 from getting caught in the introduction portion Ce while being guided by the introduction portion Ce. As shown in FIG. 17, when the advancing / retreating member 3 moves in the retracted direction D2 from the retracted holding position, the first contact surface Cd1 of the guided portion Cd comes into contact with the first cam surface Ca. When the advancing / retreating member 3 is further subjected to a force in the retracted direction D2, the advancing / retreating member 3 rotates to a position where the guided portion Cd overlaps with the introduction portion Ce around the axis X. After that, when the force on the advancing / retreating member 3 in the retracted direction D2 is released, the biasing force of the biasing member 4 moves the advancing / retreating member 3 in the advancing direction D1. Then, as shown in FIG. 17, in the case of a guided portion Cd that does not have an inclined surface that is inclined in the opposite direction to the introduction portion Ce, the corner between the second contact surface Cd2 of the guided portion Cd and the abutment portion CT becomes caught in contact with the introduction portion Ce, and the advancing / retreating member 3 cannot return to the retracted holding position. In this state, when the locking member 5 is moved from the locked position to the unlocked position, the advancing / retreating member 3 unintentionally moves to the forward holding position (for example, when the vehicle is unlocked, the lid L opens unintentionally when there is no need to open it). On the other hand, as shown in FIG. 18, if the guided portion Cd has an inclined surface Cd3 that is inclined in the opposite direction to the introduction portion Ce, when the advancing / retreating member 3 moves in the forward direction D1 due to the biasing force of the biasing member 4, the guided portion Cd will not get caught on the introduction portion Ce, and the advancing / retreating member 3 can return to the backward holding position.Therefore, when the locking member 5 is moved from the locked position to the unlocked position, the advancing and retreating member 3 can be prevented from unintentionally moving to the advanced holding position.

[0066] 18, the cam mechanism C has a guide surface Gu between the second cam surface Cb and the introduction portion Ce in the direction around the axis X, the guide surface Gu being inclined in a direction and at an angle corresponding to the inclination angle of the inclined surface Cd3 of the guided portion Cd. In this case, the inclined surface Cd3 and the guide surface Gu are in surface contact with each other, allowing the advancing / retreating member 3 to smoothly return to the retracted holding position. In this embodiment, the guide surface Gu also functions as a stop portion ST when the advancing / retreating member 3 moves from the advanced holding position to the retracted holding position.

[0067] Next, the operation of the advancing and retreating movement device 1 of this embodiment will be described using an example in which the advancing and retreating movement device 1 is applied to a lid opening and closing device D. Note that the following description is merely an example, and the present invention is not limited to the following description.

[0068] The state in which the lid L (see FIG. 4) is closed corresponds to the state in which the advancing / retreating member 3 is located in the retracted holding position, as shown in FIGS. 10 and 15. In the state shown in FIG. 15, the locking member 5 restricts the movement of the advancing / retreating member 3 to the advanced holding position, and therefore the opening of the lid L is locked. To open the lid L from this state for purposes such as refueling, the locked state by the locking member 5 is first released. Specifically, using an operating device such as a remote key, the locking member 5 is moved to the unlocked position as shown in FIG. 10 (for example, an unlock signal is sent to the driving unit 52, and the driving unit 52 moves the lock main body 51 to the unlocked position). Once the locking member 5 has moved to the unlocked position, the lid L can be opened by pressing it.

[0069] When the lid L is pressed, the advancing / retreating member 3 is pressed in the retraction direction D2 by the lid L, and moves in the retraction direction D2. When the advancing / retreating member 3 moves in the retraction direction D2 from the retracted holding position, as shown in FIG. 11 , the first contact surface Cd1 of the guided portion Cd comes into contact with the first cam surface Ca, and the guided portion Cd moves in one direction D3 around the axis X, and the advancing / retreating member 3 reaches the turned-back position. After the advancing / retreating member 3 reaches the turned-back position, when the pressing operation of the lid L is released, the advancing / retreating member 3 moves in the advancing direction D1 due to the biasing force of the biasing member 4 in the advancing direction D1. When the advancing / retreating member 3 moves in the advancing direction D1, as shown in FIGS. 11 and 12 , the second contact surface Cd2 of the guided portion Cd comes into contact with the introducing portion Ce, and the guided portion Cd moves in one direction D3 around the axis X, and the guided portion Cd enters the guiding portion Cc. When the guided portion Cd enters the guide portion Cc, the biasing force of the biasing member 4 causes the advancing / retreating member 3 to move in the forward direction D1 and reach the forward holding position (see FIG. 12). When the advancing / retreating member 3 reaches the forward holding position, as shown in FIG. 4, the lid L opens, allowing fuel to be filled through the fuel filler opening. In this state, the driver of the vehicle will leave the driver's seat, so the door may be locked to prevent the vehicle from being stolen during refueling. The door can be locked by transmitting a door lock signal using an operating device such as a remote key. In this embodiment, the drive unit 52 is controlled to move the lock main body 51 to the lock position in response to the vehicle door lock signal. In this case, when the door is locked during refueling with the lid L open, the lid L enters a state in which it is ready to be locked by the lock member 5 (see FIG. 13), and the locking of the lid L can be completed when the lid L is closed (see FIG. 15).

[0070] When fueling is completed with the lid L open, the lid L is closed to close the fuel filler opening. When the lid L is closed, the lid L presses the advancing / retreating member 3 in the rearward direction D2, causing it to move from the forward holding position in the rearward direction D2. When the advancing / retreating member 3 moves from the forward holding position in the rearward direction D2 from the forward holding position, as shown in FIGS. 13 and 14 , the guided portion Cd moves in one direction D3 around the axis X while the first contact surface Cd1 of the guided portion Cd contacts the first cam surface Ca, and the advancing / retreating member 3 reaches the turned-back position. At this time, even if the locking member 5 is in the locked position as shown in FIGS. 13 and 14 , the locking member 5 is not located in the first movement path of the guided portion Cd, which is the path that the advancing / retreating member 3 takes to move from the forward holding position to the turned-back position and then to the rearward holding position. This allows the advancing / retreating member 3 to reach the turned-back position and the rearward holding position. As shown in Fig. 14, after the advancing / retreating member 3 reaches the folded-back position, when the pressing operation of the lid L is released, the advancing / retreating member 3 moves in the advancing direction D1 due to the biasing force of the biasing member 4 in the advancing direction D1. When the advancing / retreating member 3 moves in the advancing direction D1, as shown by the two-dot chain line in Fig. 14, the guided portion Cd moves in one direction D3 around the axis X while the second contact surface Cd2 of the guided portion Cd contacts the second cam surface Cb, and the guided portion Cd comes into contact with the stop portion ST and stops (see Fig. 15). This holds the advancing / retreating member 3 in the retracted holding position.

[0071] 15, when the advancing / retreating member 3 is held in the retracted holding position, the contact portion CT of the guided portion Cd of the advancing / retreating member 3 faces the contact portion 5a of the locking member 5 in the direction around the axis X. In this way, along the second movement path of the guided portion Cd, which the advancing / retreating member 3 moves from the retracted holding position via the turned-back position to the advanced holding position, the locking member 5 is positioned so that the contact portion 5a faces the contact portion CT. More specifically, along the second movement path, the locking member 5 is positioned between the retracted holding position and the turned-back position of the guided portion Cd. As a result, even if the lid L is pressed, the advancing / retreating member 3 cannot reach the advanced holding position, and therefore the lid L is prevented from opening.

[0072] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments. Note that the above-described embodiments mainly describe the invention having the following configurations.

[0073] (1) A case and a reciprocating member that is movable relative to the case while rotating around an axis in a forward direction in which the member protrudes from the case and in a backward direction that is the opposite direction to the forward direction; a biasing member that biases the advancing / retreating member in the advancing direction; a cam mechanism configured to hold the advancing / retreating member at an advanced holding position where it is moved in the advancing direction and at a retreated holding position where it is moved in the retreating direction; a locking member that is movable between a locked position that restricts movement of the advancing / retreating member to the advanced holding position when the advancing / retreating member is located at the retracted holding position and an unlocked position that allows movement of the advancing / retreating member to the advanced holding position; Equipped with the advancing / retreating member is configured to pass through a turning-back position that is further on the rearward direction side of the rearward holding position and is rotated a predetermined angle in a direction around the axis from the rearward holding position when moving between the advanced holding position and the rearward holding position, the advancing / retreating member has an abutting portion that can abut against a contacted portion of the locking member that is at the locked position in the direction around the axis when a force acts on the advancing / retreating member in a direction rotating around the axis from the retracted holding position toward the folded-back position, When the locking member is in the locked position, the abutted portion and the abutting portion are a positional relationship in which the abutted portion does not abut against the abutting portion of the advancing / retreating member until the advancing / retreating member moves from the advanced holding position to the retreated holding position via the turned-back position, and a positional relationship in which, when a force is applied in a direction in which the advancing / retreating member moves in the retreating direction from the retreated holding position and rotates in the axial direction, the abutted portion faces the abutting portion in the axial direction to limit the rotation of the advancing / retreating member in the axial direction to a predetermined range so that the advancing / retreating member does not move to the advancement / retention position It is positioned in Advance / retreat movement device.

[0074] (2) When the advancing / retreating member is moved from the forward holding position to the retracted holding position, the cam mechanism is configured to move the advancing / retreating member from the retracted holding position to the retracted holding position by the biasing member after the advancing / retreating member reaches the retracted position, and to hold the advancing / retreating member therein; The cam mechanism is configured such that, when moving the advancing / retreating member from the retracted holding position to the advanced holding position, after the advancing / retreating member reaches the turned-back position from the retracted holding position, the cam mechanism moves the advancing / retreating member from the turned-back position to the advanced holding position by the biasing member and holds the advancing / retreating member therein. The advance / retreat movement device described in (1).

[0075] (3) The cam mechanism is a first cam surface provided on the case; and a second cam surface provided on the case. a guide portion provided on the case and extending along the axial direction of the advancing and retreating member; a guided portion that is provided on an outer periphery of the advancing / retreating member, the guided portion having a first contact surface that contacts the first cam surface and a second contact surface that contacts the second cam surface, and that can be guided by the guide portion; and the first cam surface is inclined so as to come into contact with the first contact surface of the guided portion when the advancing / retreating member moves in the retreating direction to the turned-back position, and to rotate the advancing / retreating member in one direction around the axis, the second cam surface is inclined so as to come into contact with the second contact surface of the guided portion and rotate the advancing / retreating member in the one direction around the axis when the advancing / retreating member moves in the advancing direction from the folded-back position to the advanced holding position and then held at the retreated holding position; The advance / retreat moving device according to (1) or (2).

[0076] (4) The contact portion is provided on the guided portion, the cam mechanism has an introduction portion that guides the guided portion to the guide portion when the advancing / retreating member moves from the retreated holding position to the advanced holding position via the turned-back position, the introduction portion is inclined so that, when the advancing / retreating member attempts to move further in the forward direction while in contact with the second contact surface of the guided portion, a force that rotates the advancing / retreating member in one direction around the axis is generated, The guided portion is The advance / retreat movement device according to any one of (1) to (3), wherein the first contact surface of the guided portion contacts the first cam surface, and the abutting portion and the abutted portion abut in the direction around the axis, and then when the guided portion moves in the forward direction due to the biasing force of the biasing member, the second contact surface of the guided portion has an inclined surface that is inclined in the opposite direction to the introduction portion so that the second contact surface of the guided portion is not guided by the introduction portion.

[0077] (5) A forward / backward movement device described in any one of (1) to (4), wherein the cam mechanism has a guide surface inclined in a direction and angle corresponding to the inclination angle of the inclined surface of the guided portion between the second cam surface and the introduction portion in the direction around the axis.

[0078] (6) The locking member moves to be positioned on the rotation trajectory of the guided portion when positioned at the locking position, The advance / retreat movement device according to any one of (1) to (5), wherein when the advancing / retreating member rotates around the axis and a rotational force around the axis is applied from the abutting portion provided on the guided portion to the abutted portion of the locking member, the abutted portion and the abutting portion engage with each other so that the rotational force acts in a direction that moves the locking member closer to the advance / retreat member.

[0079] (7) A forward / backward moving device described in any one of (1) to (6), wherein the abutted portion is configured by a surface extending along a line connecting the abutment point where the abutted portion and the abutting portion abut and the axis of the forward / backward member, and the abutted portion and the abutting portion are configured to be in surface contact with each other.

[0080] (8) The forward / backward moving device according to any one of (1) to (7), a base having an opening and to which the forward / backward moving device is attached; a lid that can open and close the opening of the base and that can engage with an end portion of the advancing / retracting member in the forward direction; A lid opening and closing device comprising:

[0081] (9) The lid is a fuel or power supply lid for a vehicle, the locking member has a locking body that can come into contact with the advancing / retreating member, and a driving part that moves the locking body to the locked position and the unlocked position, The lid opening and closing device according to (8), wherein the drive unit is controlled to move the lock body to the lock position in response to a lock signal for a door of the vehicle. [Explanation of symbols]

[0082] 1 Advance / retreat movement device 2 cases 2a Bottom 21. Retractable member storage section 22 Locking member accommodating section 23 Protrusion 24 Support part 3. Moving parts 31 Locking part 32 Main Unit 4. Pressurizing member 5 Locking member 5a Contacted part 51 Lock body 511 Driven part 512 Extension section 52 Drive unit 521 Motor 522 screw shaft B Base (body) Ba opening C cam mechanism Ca First cam surface Cb Second cam surface Cc guide part Cd Guided part Cd1 1st contact surface Cd2 2nd contact surface Cd3, Cd4 inclined plane Ce Introduction CT contact part D Lid opening and closing device D1 Forward direction D2 Reverse direction One direction around the D3 axis F rotational force F1, F2 force G1: Distance around the axis between the contacting part and the contacted part Gu guideway H hinge L Lid (Fuel Lid) La Locked part on the operation target side LN: The line connecting the contact point where the contacted part and the contact part come into contact with the axis of the advancing / retracting member. ST, ST2 stop part X-axis

Claims

1. Case and a reciprocating member that is movable relative to the case while rotating around an axis in a forward direction in which the member protrudes from the case and in a backward direction that is the opposite direction to the forward direction; a biasing member that biases the advancing / retreating member in the advancing direction; a cam mechanism configured to hold the advancing / retreating member at an advanced holding position where it is moved in the advancing direction and at a retreated holding position where it is moved in the retreating direction; a locking member that is movable between a locked position that restricts movement of the advancing / retreating member to the advanced holding position when the advancing / retreating member is located at the retracted holding position and an unlocked position that allows movement of the advancing / retreating member to the advanced holding position; Equipped with the advancing / retreating member is configured to pass through a turning-back position that is further on the rearward direction side of the rearward holding position and is rotated a predetermined angle in a direction around the axis from the rearward holding position when moving between the advanced holding position and the rearward holding position, the advancing / retreating member has an abutting portion that can abut against a contacted portion of the locking member that is at the locked position in the direction around the axis when a force acts on the advancing / retreating member in a direction rotating around the axis from the retracted holding position toward the folded-back position, When the locking member is in the locked position, the abutted portion and the abutting portion are a positional relationship in which the abutted portion does not abut against the abutting portion of the advancing / retreating member until the advancing / retreating member moves from the advanced holding position to the retreated holding position via the turned-back position, and a positional relationship in which, when a force is applied in a direction in which the advancing / retreating member moves in the retreating direction from the retreated holding position and rotates in the axial direction, the abutted portion faces the abutting portion in the axial direction to limit the rotation of the advancing / retreating member in the axial direction to a predetermined range so that the advancing / retreating member does not move to the advancement / retention position It is positioned in Advance / retreat movement device.

2. the cam mechanism is configured to, when moving the advancing / retreating member from the advanced holding position to the retracted holding position, move the advancing / retreating member from the retracted holding position by the biasing member after the advancing / retreating member reaches the retracted position and hold the advancing / retreating member therein, The cam mechanism is configured such that, when moving the advancing / retreating member from the retracted holding position to the advanced holding position, after the advancing / retreating member reaches the turned-back position from the retracted holding position, the cam mechanism moves the advancing / retreating member from the turned-back position to the advanced holding position by the biasing member and holds the advancing / retreating member therein. The advance / retreat movement device according to claim 1 .

3. The cam mechanism a first cam surface provided on the case; and a second cam surface provided on the case. a guide portion provided on the case and extending along the axial direction of the advancing and retreating member; a guided portion that is provided on an outer periphery of the advancing / retreating member, the guided portion having a first contact surface that contacts the first cam surface and a second contact surface that contacts the second cam surface, and that can be guided by the guide portion; and the first cam surface is inclined so as to come into contact with the first contact surface of the guided portion when the advancing / retreating member moves in the retreating direction to the turned-back position, and to rotate the advancing / retreating member in one direction around the axis, the second cam surface is inclined so as to come into contact with the second contact surface of the guided portion and rotate the advancing / retreating member in the one direction around the axis when the advancing / retreating member moves in the advancing direction from the folded-back position to the advanced holding position and then held at the retreated holding position; The advance / retreat movement device according to claim 1 .

4. The abutting portion is provided on the guided portion, the cam mechanism has an introduction portion that guides the guided portion to the guide portion when the advancing / retreating member moves from the retreated holding position to the advanced holding position via the turned-back position, the introduction portion is inclined so that, when the advancing / retreating member attempts to move further in the forward direction in a state in which the introduction portion is in contact with the second contact surface of the guided portion, a force that rotates the advancing / retreating member in one direction around the axis is generated, The guided portion is 4. The advance / retreat movement device according to claim 3, wherein the first contact surface of the guided portion contacts the first cam surface, and the abutting portion and the abutted portion abut in the direction around the axis, and then when the guided portion moves in the forward direction due to the biasing force of the biasing member, the second contact surface of the guided portion has an inclined surface that is inclined in the opposite direction to the introduction portion so that the second contact surface of the guided portion is not guided by the introduction portion.

5. 5. The advance / retreat movement device according to claim 4, wherein the cam mechanism has a guide surface inclined in a direction and at an angle corresponding to the inclination angle of the inclined surface of the guided portion between the second cam surface and the introduction portion in the direction around the axis.

6. the locking member moves to be positioned on a rotation locus of the guided portion when positioned at the locking position, 4. The advance / retreat movement device according to claim 3, wherein when the advancing / retreating member rotates about the axis and a rotational force about the axis is applied from the abutting portion provided on the guided portion to the abutted portion of the locking member, the abutted portion and the abutting portion engage with each other so that the rotational force acts in a direction bringing the locking member closer to the advance / retreat member.

7. 7. The advance / retreat movement device according to claim 6, wherein the abutted portion is configured by a surface extending along a line connecting the abutment point where the abutted portion and the abutting portion abut and the axis of the advance / retreat member, and the abutted portion and the abutting portion are configured to be in surface contact.

8. The advance / retreat movement device according to claim 1 ; a base having an opening and to which the forward / backward moving device is attached; a lid that can open and close the opening of the base and that can engage with an end portion of the advancing / retracting member in the forward direction; A lid opening and closing device comprising:

9. the lid is a fuel or power lid for a vehicle, the locking member has a locking body that can come into contact with the advancing / retreating member, and a driving part that moves the locking body to the locked position and the unlocked position, The lid opening and closing device according to claim 8 , wherein the drive unit is controlled to move the lock body to the lock position in response to a door lock signal of the vehicle.

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