Lid opening and closing device

Abstract

To provide a lid opening / closing device capable of suppressing an increase in cost and achieving automatic opening / closing and locking of a lid.SOLUTION: A lid opening / closing device 10 includes: a base 20; a lid 30; an arm 32 having a pivot part 36 and an engagement part 38 and movable between a retreat position and an advance position; a rotor 52 for moving the arm 32 by a driving force received from a driving source 51; a lock member 40 rotatable between a lock position and an unlock position when the arm 32 is in the retreat position; a cam 53a for rotating the lock member 40 to the unlock position side when the arm 32 is moved to the advance position; and a differential mechanism 60 for delaying the start of rotation of the pivot part 36 relative to the start of rotation of the rotor 52 when the arm 32 is moved to the advance position.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a lid opening / closing device.

Background Art

[0002] Patent Documents 1 and 2 disclose lid opening / closing devices used in electric vehicles. The lid opening / closing device of Patent Document 1 includes a motor for automatically opening and closing the lid. The lid opening / closing device of Patent Document 2 includes a locking mechanism including an actuator that moves a locking pin for locking the lid back and forth between a locked position and an unlocked position.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the lid opening / closing device of Patent Document 1, since the lid in the closed state cannot be locked in an unreleasable manner, there is room for improvement in terms of security. If the locking mechanism of Patent Document 2 is applied to the lid opening / closing device of Patent Document 1, the security can be improved. In this case, since two drive sources for opening / closing and locking the lid are required, the manufacturing cost of the lid opening / closing device increases.

[0005] An object of the present invention is to provide a lid opening / closing device that can suppress an increase in cost and realize automatic opening / closing and locking of the lid.

Means for Solving the Problems

[0006] The present invention includes a base disposed inside a receiving port of a panel, a lid for openably closing the receiving port, a pivot portion on one end side pivotally supported by the base, a continuous portion on the other end side continuous with the lid, and an engaging portion provided on the pivot portion. The present invention further includes an arm movable between a retracted position in which it retracts into the panel and the receiving port is closed by the lid, and an extended position in which it protrudes outside the panel and the receiving port is opened; a rotating body that transmits the driving force received from a drive source to the pivot portion and moves the arm between the retracted position and the extended position; a locking member pivotally supported by the base adjacent to the pivot portion, rotatable about a rotation axis extending along the rotation axis of the pivot portion between a locked position in which it engages with the engaging portion when the arm is in the retracted position and an unlocked position in which the engagement with the engaging portion is released; a cam rotatable in conjunction with the rotating body, transmitting the rotational force of the rotating body when moving the arm in the retracted position to the extended position, and rotating the locking member in the locked position to the unlocked position side; and a differential mechanism for starting the rotation of the pivot portion with a delay with respect to the start of rotation of the rotating body when moving the arm in the retracted position to the extended position. The present invention provides a lid opening and closing device.

[0007] Since it is provided with a rotating body that transmits the driving force of the drive source to the pivot portion and moves the arm between the retracted position and the extended position, the lid can be automatically opened and closed via the arm. Further, since it is provided with a locking member rotatable between a locked position in which it engages with the engaging portion of the pivot portion when the arm is in the retracted position and an unlocked position in which the engagement with the engaging portion is released, the lid in the closed state can be locked via the arm. Further, since it is provided with a cam that transmits the rotational force of the rotating body and rotates the locking member in the locked position to the unlocked position side when moving the arm in the retracted position to the extended position, the lock by the locking member can be released during the opening operation of the lid. In this way, with one drive source, it is possible to realize the automatic opening and closing of the lid and the locking of the lid by the locking member. Therefore, compared with the case of mounting two drive sources, it is possible to improve security while suppressing the increase in size and cost of the lid opening and closing device.

Advantages of the Invention

[0008] In the present invention, an increase in cost can be suppressed, and automatic opening / closing and locking of the lid can be realized.

Brief Description of the Drawings

[0009]

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Figure 22B

Mode for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0011] FIG. 1 shows a lid opening / closing device 10 according to an embodiment of the present invention. The lid opening / closing device 10 includes a power supply connector (power receiving / supplying unit) 15 to which a charging plug (not shown) is connected, and is attached to a side panel (panel) 1 of an automobile. However, the power receiving / supplying unit may be for supplying any one of liquid fuels such as gasoline and light oil, and gaseous fuels such as hydrogen and LP gas.

[0012] The X direction indicated in the drawings is the longitudinal direction of the vehicle, the Y direction is the lateral direction of the vehicle, and the Z direction is the vertical direction of the vehicle. In each individual figure, the direction indicated by the arrow in the X direction is the front side, and the direction opposite to the arrow is the rear side. The direction indicated by the arrow in the Y direction is the inner side (inside) of the vehicle, and the direction opposite to the arrow is the outer side (outside) of the vehicle. The direction indicated by the arrow in the Z direction is the upper side, and the direction opposite to the arrow is the lower side.

[0013] Referring to FIG. 1, the side panel 1 is provided with a receiving port 2 penetrating in the lateral direction Y of the vehicle. The shape of the receiving port 2 as viewed in the lateral direction Y of the vehicle is generally an elliptical shape in the present embodiment, but can be changed as required.

[0014] Referring to FIGS. 1 to 3, the lid opening and closing device 10 includes a base 20 attached to the inner side of the side panel 1 in the lateral direction Y of the vehicle, and a lid 30 that closes the receiving port 2 in an openable manner. The lid 30 includes an arm 32 whose one end side is pivotally supported by the base 20. The arm 32 includes an arm body 33 constituted by a first arm portion 34 and a second arm portion 35, and a spindle 37 that constitutes a part of the pivoting portion 36.

[0015] The lid opening and closing device 10 further includes a lock pin (locking member) 40 that locks the arm 32 in a state where the lid 30 is rotated to the closed position shown in FIG. 3, a torsion spring (biasing member) 44, and a drive mechanism 50 that moves the arm 32 and the lock pin 40. The drive mechanism 50 includes a motor (drive source) 51 and an input cam 52 having a cam surface (cam) 53a. Referring to FIG. 5, the drive mechanism 50 of the present embodiment includes a differential mechanism 60 that transmits a driving force to the spindle 37 to open and close the lid 30. The differential mechanism 60 delays the rotation of the spindle 37 with respect to the start of rotation of the lock pin 40 when rotating the lid 30 in the closed position to the open position.

[0016] By the drive mechanism 50, the arm 32 is rotated between the extended position shown in FIG. 2 protruding outside the side panel 1 via the differential mechanism 60 and the retracted position shown in FIG. 3 retracted into the side panel 1. The lid 30 assumes a posture (open position) in which the receiving port 2 is opened when the arm 32 rotates to the extended position as shown in FIG. 2, and assumes a posture (closed position) in which the receiving port 2 is closed when the arm 32 rotates to the retracted position as shown in FIG. 3. Further, by the drive mechanism 50, the lock pin 40 is rotated (moved) from the lock position shown in FIG. 3 to the unlock position shown in FIG. 2. By the differential mechanism 60, the rotation of the arm 32 is started with a delay with respect to the start of the movement of the lock pin 40 from the lock position toward the unlock position side. The lock pin 40 at the unlock position shown in FIG. 2 is biased to the lock position shown in FIG. 3 by the torsion spring 44.

[0017] Next, the base 20, the lid 30, the arm 32, the lock pin 40, the torsion spring 44, the drive mechanism 50, and the differential mechanism 60 will be specifically described.

[0018] In the following description, the rotation of the lid 30 accompanying the rotation of the arm 32 by the drive mechanism 50 may be simply referred to as the rotation of the lid 30 by the drive mechanism 50. Further, the locking or unlocking of the arm 32 by the lock pin 40 may be referred to as the locking or unlocking of the lid 30 by the lock pin 40.

[0019] Referring to FIGS. 1 and 4, the base 20 includes a base body 21 that closes the receiving port 2 and a bearing portion 24 that pivotally supports the arm 32.

[0020] The base body 21 is provided with a mounting portion 22 for mounting the power supply connector 15, and a sealing member 23 for sealing between the lid 30 in the closed position and the base body 21 is mounted.

[0021] Referring to FIG. 4, the mounting portion 22 is provided with a recess 22a that is recessed inward in the vehicle width direction Y, and a mounting port 22b is formed at the bottom of this recess 22a. A power supply connector 15 is attached to the mounting port 22b from the inner side in the vehicle width direction Y. As a result, as shown in FIG. 1, the connection portion 15a of the power supply connector 15 is located inside the power receiving / supply port 2 and is exposed to the outside of the vehicle through the power receiving / supply port 2 when the lid 30 is opened.

[0022] Referring to FIG. 1, the seal member 23 is in a ring shape corresponding to the shape of the power receiving / supply port 2 and is attached to the outer peripheral edge of the base body 21. The seal member 23 protrudes outward in the vehicle width direction Y from the base body 21 toward the power receiving / supply port 2 and is pressed against the lid 30 in the closed position shown in FIG. 3, sealing the space between the base body 21 and the lid 30 in a watertight manner. The seal member 23 is not pressed against the lid 30 in the open position shown in FIG. 2.

[0023] Referring to FIGS. 1 and 4, the base body 21 is further provided with an insertion hole 21a through which the arm 32 is inserted so as to be able to advance and retract and is located inside the power receiving / supply port 2 when viewed from the vehicle width direction Y, and an opening 21b for arranging a switch (not shown).

[0024] Referring to FIG. 4, the bearing portion 24 has an integral structure with the base body 21, is adjacent to the front side of the mounting portion 22 in the vehicle length direction X, and protrudes inward in the vehicle width direction Y. The bearing portion 24 includes an end wall portion 25 located on the upper side in FIG. 4, an end wall portion 26 located on the lower side in FIG. 4, and a side wall portion 27 connecting the end wall portions 25 and 26. The end wall portions 25 and 26 are provided at intervals in the vehicle height direction Z and both extend along the XY plane. The end wall portion 25 protrudes inward in the vehicle width direction Y from above the insertion hole 21a, and the end wall portion 26 protrudes inward in the vehicle width direction Y from below the insertion hole 21a. The side wall portion 27 closes the space between the front ends in the vehicle length direction X and the outer ends in the vehicle width direction Y of the end wall portions 25 and 26 respectively. The space between the rear ends in the vehicle length direction X of the end wall portions 25 and 26 and the inner ends in the vehicle width direction Y of the end wall portions 25 and 26 is open, and a gap is formed between the end wall portions 25 and 26.

[0025] Referring to FIGS. 5 and 6, on the end wall portion 25, there are provided a first arrangement portion 25a for rotatably arranging the input cam 52 of the drive mechanism 50, a second arrangement portion 25b for rotatably arranging the lock pin 40, and a third arrangement portion 25c for arranging the torsion spring 44. The specific configurations of the arrangement portions 25a to 25c will be described in detail later.

[0026] Referring to FIGS. 1 and 4, the upper ends of the first arrangement portion 25a to the third arrangement portion 25c are covered by the cover 28. Inside the cover 28, the lock pin 40, the torsion spring 44, and the input cam 52 are accommodated. Outside the cover 28, a mounting piece 28a for mounting the motor 51 of the drive mechanism 50 protrudes. The cover 28 is provided with a through hole 28b for connecting the external motor 51 and the internal input cam 52.

[0027] Referring to FIGS. 1 and 3, the lid 30 is plate-shaped, smaller than the receiving port 2 and larger than the sealing member 23. The lid 30 is rotatable with respect to the base 20 by pivotally supporting the arm 32 on the bearing portion 24, and closes the receiving port 2 in an openable manner. The lid 30 is located inside the sealing member 23 in the closed state shown in FIG. 3, and includes a convex portion 30a protruding toward the base body 21. A sealing member 31 pressed against the base body 21 is attached to the convex portion 30a.

[0028] The arm 32 is arranged to straddle from the inside to the outside in the vehicle width direction Y of the base 20 through the insertion hole 21a. Referring to FIGS. 5 and 6, the arm 32 includes a pivot portion 36 pivotally supported by the bearing portion 24. More specifically, the arm 32 includes an arm body 33 constituted by a first arm portion 34 and a second arm portion 35, and a spindle 37 constituting a part of the pivot portion 36.

[0029] Referring to FIGS. 1 to 3, the first arm portion 34 is arc-shaped extending in the circumferential direction around the rotation axis A of the pivot portion 36, and is inserted into the insertion hole 21a. The first arm portion 34 includes a continuous portion 34a connected to the convex portion 30a of the lid 30 at the tip (the other end side of the arm 32) located on the outside in the vehicle width direction Y.

[0030] Referring to FIGS. 5 and 6, the second arm portion 35 is plate-shaped, inserted into the gap between the end wall portions 25 and 26, and protrudes inward in the vehicle width direction Y from the bearing portion 24. The first arm portion 34 is mechanically connected to the inner end of the second arm portion 35 in the vehicle width direction Y. A cylindrical portion 35a is formed at the outer end (one end side of the arm 32) of the second arm portion 35 in the vehicle width direction Y. A spindle 37 is attached to the cylindrical portion 35a. The cylindrical portion 35a and the spindle 37 constitute a pivot portion 36.

[0031] The cylindrical portion 35a is provided with a non-circular mounting hole 35b penetrating in the vehicle height direction Z. The axis of the mounting hole 35b is the rotation axis A of the pivot portion 36.

[0032] Referring to FIGS. 5 and 6, the spindle 37 includes a mounting portion 37a, a flange portion 37b, and a shaft portion 37c. Referring to FIGS. 9 and 20B, when the spindle 37 is rotated in the direction d1 by the drive mechanism 50 to open-rotate the arm 32 in the retracted position shown in FIG. 3 to the advanced position shown in FIG. 2, and when the arm 32 in the advanced position shown in FIG. 2 is closed-rotated to the retracted position shown in FIG. 3, the spindle 37 rotates in the direction d2.

[0033] The spindle 37 is inserted and attached from above in the vehicle height direction Z to the first arrangement portion 25a of the shaft mounting portion 24. The first arrangement portion 25a is a circular through hole penetrating the end wall portion 25 in the vehicle height direction Z.

[0034] The mounting portion 37a is generally rod-shaped and has a non-circular cross-sectional shape corresponding to the cross-sectional shape of the mounting hole 35b. By attaching the mounting portion 37a into the mounting hole 35b, the spindle 37 and the cylindrical portion 35a rotate integrally.

[0035] The flange portion 37b is continuous with the upper end of the attachment portion 37a and is located above the cylinder portion 35a in the vehicle height direction Z. The flange portion 37b is circular in shape with the same diameter as the diameter of the circular cylinder portion 35a when viewed from the direction in which the rotation axis A of the pivoting portion 36 extends, and is rotatably supported by the hole wall of the first arrangement portion 25a of the end wall portion 25. By attaching the spindle 37 to the bearing portion 24, the flange portion 37b closes the bottom of the through hole that is the first arrangement portion 25a. At the center of the flange portion 37b, a shaft portion 37d having an axis that coincides with the rotation axis A and pivotally supporting the input cam 52 projects. Further provided on the flange portion 37b are an engagement groove (engagement portion) 38 with which the lock pin 40 engages and a recess 39 that constitutes the differential mechanism 60. The engagement groove 38 and the recess 39 will be described in detail later.

[0036] The shaft portion 37c is provided at the lower end of the attachment portion 37a and projects downward from the cylinder portion 35a in the vehicle height direction Z. By attaching the spindle 37 to the bearing portion 24, the shaft portion 37c is disposed in the shaft hole 26a of the end wall portion 26 provided so as to correspond to the lower side in the vehicle height direction Z of the first arrangement portion 25a. By disposing the shaft portion 37c in the shaft hole 26a and the flange portion 37b in the first arrangement portion 25a, the spindle 37 is rotatably supported by the bearing portion 24.

[0037] Referring to FIGS. 5, 10, and 11, the lock pin 40 includes a cylinder portion 40a and a lock pin main body 40b. When the arm 32 is in the retracted position, the lock pin 40 is movable between the lock position shown in FIG. 3 and the unlock position shown in FIG. 2. Referring to FIG. 9, the lock pin 40 in the lock position engages with the engagement groove 38 of the spindle 37, and referring to FIG. 20B, the lock pin 40 in the unlock position is disengaged from the engagement with the engagement groove 38.

[0038] Referring to FIG. 8, the lock pin 40 is biased by a torsion spring 44 from the unlock position toward the lock position. The rotation of the lock pin 40 due to the biasing force of the torsion spring 44 stops by abutting against the stopper 25f. The stopper 25f is constituted by a part of the partition wall between the first arrangement portion 25a and the second arrangement portion 25b, and restricts the rotation of the lock pin 40 beyond the lock position. Note that reference numeral 45 in FIG. 8 is an emergency unlocking member for manually rotating the lock pin 40 at the lock position to the unlock position via the torsion spring 44.

[0039] Referring to FIGS. 5 and 8, the lock pin 40 is arranged in the second arrangement portion 25b of the bearing portion 24. The second arrangement portion 25b is a recess with an upper end opening, and is adjacent to the first arrangement portion 25a on the inner side in the vehicle width direction Y. A part of the partition wall between the second arrangement portion 25b and the first arrangement portion 25a is cut out, and the inside of the second arrangement portion 25b and the inside of the first arrangement portion 25a are spatially communicated. On the rear side in the vehicle length direction X of the second arrangement portion 25b, a shaft portion 25d protruding upward in the vehicle height direction Z and pivotally supporting the lock pin 40 is provided. On the inner side in the vehicle width direction Y of the second arrangement portion 25b, a sensor mounting portion 25e is provided.

[0040] Referring to FIGS. 5, 10, and 11, the cylindrical portion 40a is fitted to the shaft portion 25d of the second arrangement portion 25b and is rotatable about a rotation axis B parallel to the rotation axis A of the pivoting portion 36. The arrangement of the rotation axis A and the rotation axis B does not have to be parallel in a geometrically strict sense as long as the rotation of the lock pin 40 and the engagement with the engagement groove 38 are not hindered.

[0041] The lock pin body 40b protrudes forward in the vehicle length direction X from the cylindrical portion 40a toward the torsion spring 44 so as to be adjacent to the flange portion 37b of the spindle 37. The thickness of the lock pin body 40b in the vehicle height direction Z (the direction in which the rotation axis B extends) is thicker than the thickness of the flange portion 37b of the spindle 37.

[0042] The lower portion of the lock pin body 40b in the vehicle height direction Z constitutes an engaging convex portion 41 that engages with the engaging groove 38. The upper portion of the lock pin body 40b in the vehicle height direction Z constitutes a cam follower 42 that can contact the cam surface (cam) 53a of the input cam 52. That is, the engaging convex portion 41 and the cam follower 42 are provided integrally adjacent to each other in the vehicle height direction Z.

[0043] Here, the engaging groove 38 of the spindle 37 and the engaging convex portion 41 of the lock pin 40 will be described.

[0044] Referring to FIGS. 11 and 12, the engaging groove 38 of the spindle 37 is recessed inward from the outer peripheral surface of the flange portion 37b (pivoting portion 36). The engaging groove 38 is defined by a base surface 38a, a contact surface 38b, and a regulating surface 38c. A guide surface 38d is formed at the outer end of the contact surface 38b of the engaging groove 38.

[0045] The base surface 38a is a flat fan shape extending along the XY plane. Referring to FIG. 7, in a state where the spindle 37 is disposed in the first disposition portion 25a, the base surface 38a is located below the lock pin 40 in the vehicle height direction Z.

[0046] Referring to FIGS. 11 and 12, the contact surface 38b projects in a direction orthogonal to the base surface 38a and extends in the radial direction of the flange portion 37b and is a flat surface. The direction in which the contact surface 38b extends does not have to be the radial direction of the flange portion 37b in a geometrically strict sense as long as it does not inhibit the engagement and disengagement of the lock pin 40. Also, the contact surface 38b does not have to be a flat surface in a geometrically strict sense as long as it does not inhibit the engagement and disengagement of the lock pin 40. Referring to FIG. 9, when the spindle 37 is rotated in the opening direction d1 via the arm 32 due to an unauthorized opening operation of the lid 30 in the closed state, the contact surface 38b restricts the rotation of the spindle 37 by contacting the engaging convex portion 41 of the lock pin 40. That is, the contact surface 38b prevents the rotation of the arm 32 from the retracted position to the advanced position and the rotation of the lid 30 from the closed position to the open position by contacting the engaging convex portion 41.

[0047] Referring to FIGS. 9 and 12, the restricting surface 38c is a flat surface that protrudes in a direction orthogonal to the base surface 38a and extends in a direction intersecting the radial direction of the flange portion 37b. The restricting surface 38c extends along the engaging convex portion 41 in the locked position and restricts the rotation of the locking pin 40 directed toward the rotation axis A of the pivoting portion 36. The angle formed by the restricting surface 38c and the abutting surface 38b is set to 90 degrees or more, preferably set to an angle greater than 90 degrees and close to 90 degrees (for example, 92 degrees).

[0048] The guide surface 38d is provided at the outer end of the abutting surface 38b in the radial direction of the flange portion 37b and is a flat surface inclined to the opposite side of the restricting surface 38c. More specifically, the guide surface 38d is inclined from the inner side to the outer side in the radial direction of the flange portion 37b in the direction d2 in which the spindle 37 rotates in the closing direction. The guide surface 38d configured in this way rotates the locking pin 40 rotated from the locked position (see FIG. 9) to the unlocking position side (see FIG. 18B) to the unlocking position (see FIG. 19B).

[0049] Referring to FIGS. 10 and 13, the engaging convex portion 41 of the locking pin 40 protrudes closer to the rotation axis A of the pivoting portion 36 than the cam follower 42. That is, the lateral width of the engaging convex portion 41 in the circumferential direction around the rotation axis B of the locking pin 40 is larger than the lateral width of the cam follower 42. Referring to FIG. 9, the tip portion 41a of the engaging convex portion 41 on the side opposite to the cylindrical portion 40a is chamfered in an arc shape in cross section. In a state where the arm 32 is rotated to the retracted position, the abutting surface 38b of the engaging groove 38 can abut and slidably contact the tip portion 41a.

[0050] The lock pin 40 is set to a lock position shown in FIGS. 8 and 9 and an unlock position shown in FIGS. 19A and 19B. In the lock position shown in FIGS. 8 and 9, the lid 30 in the closed position shown in FIG. 3 is locked so as not to be movable via the spindle 37. In the unlock position shown in FIGS. 19A and 19B, the lock of the lid 30 is released via the spindle 37, and the lid 30 can be opened and closed. The rotational angle position of the lock pin 40 in the lock position is different from the rotational angle position of the lock pin 40 in the unlock position. The rotational angle position of the lock pin 40 is defined as the direction in which the center line of the lateral width of the engaging convex portion 41 extends in the circumferential direction around the rotation axis B.

[0051] As shown in FIG. 9, the lock position of the lock pin 40 is set to a second rotation angle position rotated toward the rotation axis A of the pivot portion 36 from a first rotation angle position where the engaging convex portion 41 extends in a direction orthogonal to the contact surface 38b. As shown in FIG. 19B, the unlock position of the lock pin 40 is set to a rotation angle position where the engaging convex portion 41 abuts on the outer periphery of the flange portion 37b of the spindle 37.

[0052] When the engaging convex portion 41 extends in the orthogonal direction with respect to the contact surface 38b, the first rotation angle position is the limit position where the rotation of the lock pin 40 toward the unlocking position can be blocked by the contact (pressing) of the contact surface 38b against the engaging convex portion 41 when the lid 30 is illegally opened. The side closer to the rotation axis A than the first rotation angle position including the aforementioned second rotation angle position is a release prevention region where the illegal opening of the lid 30 can be blocked. When the contact surface 38b presses the engaging convex portion 41 rotated to this region, the lock pin 40 rotates toward the locking position. However, the rotation of the lock pin 40 is restricted by contact with the restricting surface 38c of the engaging groove 38. Thereby, the forward rotation of the spindle 37 in the direction d1 is blocked by the contact of the contact surface 38b against the engaging convex portion 41. As a result, the lid 30 cannot rotate to the open position shown in FIG. 2 and remains in the closed position shown in FIG. 3. Therefore, the second rotation angle position where the engaging convex portion 41 rotates to the side closer to the rotation axis A of the pivoting portion 36 than the first rotation angle position where the engaging convex portion 41 extends in the orthogonal direction with respect to the contact surface 38b is set as the locking position of the lock pin 40. However, the posture where the engaging convex portion 41 is located at the first rotation angle position may be set as the locking position of the lock pin 40.

[0053] On the other hand, the side farther from the rotation axis A than the first rotation angle position where the engaging convex portion 41 extends in the orthogonal direction with respect to the contact surface 38b is a region where the illegal opening of the lid 30 cannot be blocked. When the contact surface 38b presses the engaging convex portion 41 rotated to this region, a force that rotates the lock pin 40 in a direction away from the rotation axis A of the pivoting portion 36 acts on the lock pin 40. Thereby, the lock pin 40 rotates toward the unlocking position shown in FIG. 19B, and the engaging convex portion 41 disengages from the engaging groove 38. As a result, the spindle 37 can rotate in the direction d1. Therefore, the rotation angle position where the engaging convex portion 41 is farther from the rotation axis A of the pivoting portion 36 than the first rotation angle position where the engaging convex portion 41 extends in the orthogonal direction with respect to the contact surface 38b and the engaging convex portion 41 contacts the outer periphery of the flange portion 37b of the spindle 37 is set as the unlocking position of the lock pin 40.

[0054] Referring to FIGS. 11 and 13, the cam follower 42 of the lock pin 40 is constituted by a portion of the lock pin body 40b above the engagement convex portion 41 in the vehicle height direction Z. The cam follower 42 is longer in the overall length than the engagement convex portion 41 and protrudes forward in the vehicle length direction X from the engagement convex portion 41. An arcuate chamfered portion 42a is provided at a corner located on the rotation axis A side (outside in the vehicle width direction Y) of the tip of the cam follower 42 on the side opposite to the cylindrical portion 40a. When the lock pin 40 is in the lock position shown in FIGS. 8 and 9, the gap between the cam follower 42 and the cam surface 53a of the input cam 52 is larger than the gap between the engagement convex portion 41 and the contact surface 38b of the spindle 37. Therefore, when the lock pin 40 is in the lock position and the lid 30 is opened, the contact surface 38b contacts the engagement convex portion 41 due to the rotation of the spindle 37, and the cam surface 53a does not contact the cam follower 42. This prevents the lock pin 40 from rotating toward the unlock position via the input cam 51 due to improper operation of the lid 30.

[0055] On the side of the lock pin body 40b opposite to the chamfered portion 42a of the cam follower 42, a frame-shaped mounting portion 43 for attaching the torsion spring 44 is provided. The mounting portion 43 protrudes inward in the vehicle width direction Y.

[0056] Referring to FIGS. 5 and 8, the torsion spring 44 includes a winding portion 44a, a first arm portion 44b, and a second arm portion 44c, and is disposed in the third arrangement portion 25c of the bearing portion 24. The third arrangement portion 25c is adjacent to the first arrangement portion 25a on the inner side in the vehicle width direction Y and adjacent to the second arrangement portion 25b on the front side in the vehicle length direction X. The winding portion 44a is fitted into a positioning convex portion 25g protruding upward in the vehicle height direction Z and is positioned in a first groove 25h surrounding the positioning convex portion 25g. The first arm portion 44b is positioned in a second groove 25i extending in a direction contacting the first groove 25h. A part of the partition wall between the third arrangement portion 25c and the second arrangement portion 25b is cut out, and they are spatially connected. The second arm portion 44c protrudes into the second arrangement portion 25b from the cutout of the partition wall and is hooked and attached to the attachment portion 43.

[0057] Referring to FIGS. 4 and 5, the drive mechanism 50 includes one motor 41 disposed on the cover 28 and an input cam 52 disposed on the first disposed portion 25a of the bearing portion 24.

[0058] The motor 51 is a drive source capable of forward and reverse rotation, and performs both the opening and closing of the lid 30 and the rotation of the lock pin 40. The motor 51 rotates forward or reversely when a drive circuit (not shown) electrically connected thereto is controlled by an ECU (Electronic Control Unit). By forward rotation, the motor 51 rotates the lock pin 40 at the lock position to the unlock position via the input cam 52 and the spindle 37, and rotates the arm 32 at the retracted position to the advanced position via the input cam 52 and the differential mechanism 60. By reverse rotation, the motor 51 rotates the arm 32 at the advanced position to the retracted position via the input cam 52 and the differential mechanism 60. Thereby, the rotation of the lock pin 40 from the unlock position to the lock position due to the biasing force of the torsion spring 44 is allowed.

[0059] Referring to FIGS. 5 and 6, the input cam 52 is a rotating body disposed on the first disposed portion 25a so as to be located on the flange portion 37b of the spindle 37, and rotates by the driving force received from the motor 51. The input cam 52 includes a cam surface (cam) 53a that transmits the driving force received from the motor 51 to the lock pin 40 and moves the lock pin 40 at the lock position toward the unlock position. The input cam 52 also integrally includes a convex portion 54 that constitutes a differential mechanism 60 for transmitting the driving force received from the motor 51 to the spindle 37. The convex portion 54 will be described in detail later.

[0060] Referring to FIGS. 10 and 11, the input cam 52 includes a fan-shaped main body 52a as viewed from the direction in which the rotation axis A of the pivot portion 36 extends, and a connection portion 52b protruding from the center of the main body 52a. Referring to FIG. 4, the connection portion 52b penetrates through the through hole 28b and protrudes outside the cover 28, and is connected to the motor 51. The connection portion 52b protrudes along the rotation axis A, and has a non-circular cross-section with a plurality of ridges protruding radially on the outer peripheral surface. However, the connection portion 52b may be provided on the motor 51 side and connected to the input cam 52.

[0061] Referring to FIG. 6, the input cam 52 is provided with a shaft hole 52c. The input cam 52 is pivotally supported on the flange portion 37b by fitting the shaft hole 52c into the shaft portion 37d of the spindle 37, and rotates around the rotation axis A of the pivot portion 36.

[0062] Referring to FIGS. 11 and 14, a notch 53 is formed in the main body 52a to allow the engagement convex portion 41 to engage with the engagement groove 38. The notch 53 is recessed inward from the outer peripheral surface of the input cam 52 and penetrates in the vehicle height direction Z. The input cam 52 is disposed on the spindle 37 such that the notch 53 is located above the engagement groove 38. As viewed from the direction in which the rotation axis A of the pivot portion 36 extends, the angular range α of the notch 53 around the rotation axis A of the pivot portion 36 is formed with a width capable of exposing the engagement groove 38. More specifically, as shown in FIGS. 17A to 21A, the notch 53 is formed within the angular range α where the engagement groove 38 is exposed during both the opening operation of moving the arm 32 in the retracted position to the advanced position and the closing operation of moving the arm 32 in the advanced position to the retracted position.

[0063] One of the wall surfaces that define the notch 53 constitutes a cam surface (cam) 53a that transmits the rotational force of the input cam 52 and rotates the lock pin 40 in the locked position toward the unlocked position when moving the arm 32 in the retracted position to the extended position. Specifically, the notch 53 is defined by a cam surface 53a and an opposing surface 53b that oppose each other in the circumferential direction around the rotation axis A of the pivot portion 36, and an inner circumferential surface 53c that extends in the circumferential direction. The cam surface 53a is located on the rear side in the direction d1 in which the input cam 52 rotates in the open direction. The cam surface 53a bulges in an arc shape toward the opposing surface 53b and rotates in conjunction with the input cam 52.

[0064] When moving the arm 32 in the retracted position to the extended position, the lock pin 40 in the locked position is rotated to the unlocked position by the cam surface 53a of the input cam 52 and the guide surface 38d of the spindle 37. Specifically, the lock pin 40 in the locked position is rotated toward the unlocked position by the sliding contact between the cam surface 53a and the cam follower 42 (see FIGS. 17A and 17B). At this time, the lock pin 40 is rotated by the cam surface 53a to a region located on the unlocked position side from the first rotation angle position where the engaging convex portion 41 extends in the orthogonal direction with respect to the contact surface 38b. Subsequently, the lock pin 40 is rotated to the unlocked position by the sliding contact between the engaging convex portion 41 and the guide surface 38d (see FIGS. 19A and 19B).

[0065] Referring to FIGS. 5 and 10, the differential mechanism 60 is composed of a concave portion 39 of the spindle 37 and a convex portion 54 of the input cam 52, and these cause the rotation of the pivot portion 36 to start with a delay with respect to the start of rotation of the input cam 52. However, the concave portion 39 may be provided on the input cam 52 and the convex portion 54 may be provided on the spindle 37.

[0066] The convex portion 54 is provided on the outer peripheral portion of the lower surface of the input cam 52 that faces the spindle 37. When viewed from the direction in which the rotation axis A of the pivot portion 36 extends, the convex portion 54 has a fan shape and protrudes from the input cam 52 toward the spindle 37.

[0067] The recess 39 is provided on the flange portion 37b of the spindle 37. The recess 39 is a fan-shaped groove that is recessed inward from the outer peripheral surface of the flange portion 37b and has an open upper surface facing the input cam 52, and a convex portion 54 is disposed inside thereof (see FIG. 9).

[0068] Referring to FIG. 9, in the circumferential direction around the rotation axis A of the pivot portion 36, the angular range β for forming the convex portion 54 is smaller than the angular range γ for forming the recess 39. As a result, a gap 61 with an angular range of the difference between the angular ranges β and γ is formed between the convex portion 54 and the recess 39 in the circumferential direction around the rotation axis A. The angular range (γ - β) of this gap 61 is the differential angular range for rotating the pivot portion 36 with a delay with respect to the start of rotation of the input cam 52.

[0069] FIGS. 17A and 17B show a state in which the input cam 52 shown in FIGS. 8 and 9 is rotated by the differential angular range (γ - β). Referring to FIGS. 8 and 9, and FIGS. 17A and 17B, the differential angular range (γ - β) is larger than the rotation angle of the input cam 52 when rotating the lock pin 40 at the lock position beyond the first rotation angle position to the unlock position side.

[0070] As a result, after the lock pin 40 at the lock position rotates beyond the first rotation angle position to the unlock position side, the opposing surfaces of the convex portion 54 and the recess 39 come into contact with each other, and the spindle 37 starts to rotate. As a result, while rotating the lock pin 40 to the unlock position by the guide surface 38d of the spindle 37, the arm 32 at the retracted position can be rotated to the advanced position.

[0071] FIGS. 15 and 16 are graphs showing the movements of the input cam 52, the spindle 37 (pivot portion 36), and the lock pin 40 with respect to the rotation angle position of the motor 51. FIG. 15 shows the lid opening operation for rotating the lid 30 at the closed position to the open position, and FIG. 16 shows the lid closing operation for rotating the lid 30 at the open position to the closed position.

[0072] The rotation angle range of the cam follower 42 by the cam surface 53a of the input cam 52, the rotation angle range of the engaging convex portion 41 by the guide surface 38d of the spindle 37, and the angle range (γ-β) of the gap 61 of the differential mechanism 60 are set so that the lid opening operation shown in FIG. 15 and the lid closing operation shown in FIG. 16 are established.

[0073] Hereinafter, the operation of the lid opening / closing device 10 will be described with reference to FIGS. 15 and 16.

[0074] Referring to FIG. 15, when rotating the lid 30 in the closed position to the open position, the motor 51 rotates forward from the initial rotation angle position (0) to the maximum rotation angle position (max). As a result, the input cam 52 rotates in the opening direction d1 from the closing rotation angle position shown in FIGS. 8 and 9 to the opening rotation angle position shown in FIGS. 20A and 20B. During this time, the arm 32 and the lock pin 40 operate as follows.

[0075] Since the cam surface 53a rotates integrally due to the opening rotation of the input cam 52, the lock pin 40 in the locked position starts to move toward the unlocked position after a delay time corresponding to the clearance between the cam surface 53a and the cam follower 42 (see Sa1 in FIG. 15). At this time, due to the gap 61 of the differential mechanism 60, the rotational force of the input cam 52 is not transmitted to the spindle 37 (pivoting portion 36), so the arm 32 does not rotate as shown by Sb1 in FIG. 15.

[0076] As shown in FIGS. 17A and 17B, when the input cam 52 rotates by the amount of the gap 61 of the differential mechanism 60 (differential angle range γ-β), the opposing surfaces of the recess 39 and the convex portion 54 come into contact (see Sb2 in FIG. 15). Therefore, thereafter, since the rotational force of the input cam 52 is transmitted and the spindle 37 rotates, the arm 32 in the retracted position rotates toward the advanced position (see Sb3 in FIG. 15). During this time, the lock pin 40 continues to rotate toward the unlocked position due to the sliding contact between the cam surface 53a and the cam follower 42.

[0077] Due to the rotation of the spindle 37, following the sliding contact between the cam surface 53a and the cam follower 42, as shown in FIGS. 18A and 18B, the engaging convex portion 41 slides in contact with the guide surface 38d (see Sa2 in FIG. 15). As a result, the lock pin 40 continues to rotate toward the unlock position. Thereafter, as shown in FIGS. 19A and 19B, when the spindle 37 rotates to a position where the outer end of the guide surface 38d slides in contact with the engaging convex portion 41, the lock pin 40 rotates to the unlock position (see Sa3 in FIG. 15). Then, the lock pin 40 is pressed against the outer peripheral surface of the flange portion 37b of the spindle 37 by the biasing force of the torsion spring 44 and is held in the unlock position (see Sa4 in FIG. 15).

[0078] When the input cam 52 rotates to the open rotation angle position, as shown in FIGS. 20A and 20B, the arm 32 rotates to the advanced position via the spindle 37. As a result, the lid 30 rotates to the open position. In this state, the lock pin 40 is pressed against the outer peripheral surface of the flange portion 37b by the biasing force of the torsion spring 44 and is maintained in the unlock position.

[0079] Referring to FIG. 16, when rotating the lid 30 in the open position to the closed position, the motor 51 reverses from the maximum rotation angle position (max) to the initial rotation angle position (0). As a result, the input cam 52 rotates in the closing direction d2 from the open rotation angle position shown in FIGS. 20A and 20B to the closed rotation angle position shown in FIGS. 8 and 9. During this time, the arm 32 and the lock pin 40 operate as follows.

[0080] When the input cam 52 rotates in the closing direction, the cam surface 53a rotates integrally. However, since the cam surface 53a rotates to a rotation angle position away from the cam follower 42, the lock pin 40 is held in the unlock position without rotating (see Sa5 in FIG. 16). Also, due to the gap 61 of the differential mechanism 60, the rotational force of the input cam 52 is not transmitted to the spindle 37 (pivoting portion 36). Therefore, as shown by Sb4 in FIG. 16, the arm 32 also does not rotate.

[0081] As shown in FIGS. 21A and 21B, when the input cam 52 rotates by the amount of the gap 61 (differential angle range γ-β) of the differential mechanism 60, the opposing surfaces of the concave portion 39 and the convex portion 54 come into contact (see Sb5 in FIG. 16). Therefore, thereafter, the rotational force of the input cam 52 is transmitted and the spindle 37 rotates, so that the arm 32 at the advanced position rotates toward the retracted position (see Sb6 in FIG. 16). During this period, the lock pin 40 is held at the unlock position without rotating.

[0082] Due to the rotation of the spindle 37, as shown in FIGS. 22A and 22B, the engaging convex portion 41 slides in contact with the guide surface 38d (see Sa6 in FIG. 16). As a result, the lock pin 40 at the unlock position rotates toward the lock position side by the biasing force of the torsion spring 44. Thereafter, when the input cam 52 rotates to the closed rotation angle position, the spindle 37 rotates to a position where the engaging convex portion 41 slides in contact with the contact surface 38b (see Sa7 in FIG. 16). As a result, as shown in FIGS. 8 and 9, the lock pin 40 rotates to the lock position and stops in contact with the stopper 25f. Also, the arm 32 rotates to the retracted position via the spindle 37, and the lid 30 rotates to the closed position.

[0083] As described above, by setting the rotation angle range of the cam follower 42 (lock pin 40) by the cam surface 53a of the input cam 52, the rotation angle range of the engaging convex portion 41 (lock pin 40) by the guide surface 38d of the spindle 37, and the angle range (γ-β) of the gap 61 of the differential mechanism 60 so that the lid opening operation shown in FIG. 15 and the lid closing operation shown in FIG. 16 are achieved, the rotation of the arm 32 between the advanced position shown in FIG. 2 and the retracted position shown in FIG. 3 can be realized by one motor 51 without inhibiting it, and the locking and unlocking of the arm 32 (lid 30) by the lock pin 40 can be realized.

[0084] The lid opening and closing device 10 configured as described above has the following features.

[0085] Since the input cam 52 that transmits the driving force of the motor 51 to the pivot portion 36 and moves the arm 32 to the retracted position and the advanced position is provided, the lid 30 can be automatically opened and closed via the arm 32. Further, when the arm 32 is in the retracted position, since the lock pin 40 that is rotatable between the locked position engaged with the engagement groove 38 of the pivot portion 36 and the unlocked position where the engagement with the engagement groove 38 is released is provided, the closed lid 30 can be locked via the arm 32. Further, when moving the arm 32 in the retracted position to the advanced position, since the cam surface 53a that transmits the rotational force of the input cam 52 and rotates the lock pin 40 in the locked position toward the unlocked position side is provided, the lock by the lock pin 40 can be released during the opening operation of the lid 30. Thus, since the automatic opening and closing of the lid 30 and the locking of the lid 30 by the lock pin 40 can be realized by one motor 51, compared with the case of mounting two drive sources, while suppressing the increase in size and cost of the lid opening / closing device 10, the security can be improved.

[0086] The cam surface 53a is formed by the wall surface of the notch 53 provided in the input cam 52, and the lock pin 40 includes an engagement convex portion 41 that can engage with the engagement groove 38 and a cam follower 42 that can contact the cam surface 53a. Thereby, since the cam surface 53a and the input cam 52 can be intensively arranged around the pivot portion 36, the lid opening / closing device 10 can be miniaturized.

[0087] The engagement groove 38 has a contact surface 38b that extends in the radial direction of the pivot portion 36, the engagement convex portion 41 extends in a direction intersecting the contact surface 38b, and has a tip portion 41a with a cross-sectional arc shape that slidably contacts the contact surface 38b. Therefore, the locking operation and the unlocking operation of the lock pin 40 to the engagement groove 38 can be performed smoothly.

[0088] When the lock pin 40 is in the locked position, the engaging convex portion 41 is located at a first rotation angle position extending in a direction orthogonal to the contact surface 38b, or at a second rotation angle position rotated toward the rotation axis A side of the pivot portion 36 from the first rotation angle position. Therefore, when the lid 30 in the closed state is tampered with in the opening direction, the movement of the arm 32 from the retracted position to the advanced position side can be reliably blocked by the contact of the contact surface 38b of the engaging groove 38 with the lock pin 40. At this time, the force applied to the lock pin 40 by the movement of the arm 32 does not act in a direction intersecting the engaging convex portion 41 in the direction of bending the engaging convex portion 41, but acts in the compression direction in which the engaging convex portion 41 extends. Therefore, the amount of deflection of the lock pin 40 due to unauthorized operation can be reduced, and thus the stiffness of the lock pin 40 can be improved. As a result, the holding force for holding the lid 30 in the closed state can be significantly improved as compared with the lock pin 40 to which a force is applied in a direction intersecting the extending direction in a configuration like a cantilever beam.

[0089] A stopper for restricting the rotation of the lock pin 40 beyond the locked position is provided. Thereby, when the lid 30 in the closed state is tampered with in the opening direction, the lock pin 40 can be held in the locked position, so that the locking strength of the lid 30 can be improved.

[0090] The engaging convex portion 41 protrudes toward the rotation axis A side of the pivot portion 36 more than the cam follower 42. Thereby, after the lock pin 40 is rotated from the locked position toward the unlocked position by the sliding contact between the cam follower 42 and the cam surface 53a, it is subsequently rotated to the unlocked position by the sliding contact between the engaging convex portion 41 and the outer end portion of the engaging groove 38, and is held in the unlocked position by the contact with the pivot portion 36. Therefore, an unintended movement of the lock pin 40 to the locked position can be reliably prevented.

[0091] The differential mechanism 60 has a convex portion 54 provided on one of the pivot portion 36 and the input cam 52 and a concave portion 39 provided on the other, and has a gap 61 within a defined differential angle range (γ-β) between the convex portion 54 and the concave portion 39 in the circumferential direction. Therefore, the automatic opening / closing and locking of the lid 30 can be realized by one motor 51 without inhibiting the opening / closing of the lid 30 by the lock pin 40.

[0092] The base 20 is provided with a first placement portion 25a for placing the input cam 52 and a second placement portion 25b for placing the lock pin 40, and the first placement portion 25a and the second placement portion 25b are covered by the cover 28. Therefore, it is possible to prevent adhesion of water droplets, dust, etc. to the pivot portion 36, the input cam 52 including the cam surface 53a, and the lock pin 40. Thus, malfunction of the arm 32, the input cam 52 including the cam surface 53a, and the lock pin 40 can be suppressed.

[0093] It is provided with a torsion spring 44 that biases the lock pin 40 at the unlock position to the lock position. Therefore, by moving the arm 32 at the advanced position to the retracted position, the lock pin 40 at the unlock position can be surely rotated to the lock position.

[0094] The present invention is not limited to the configuration of the above-described embodiment, and various modifications are possible.

[0095] For example, the lid 30 may be rotatable in the vertical direction about a rotation axis extending in the vehicle length direction X.

[0096] The differential mechanism 60 can be changed as necessary as long as it is a configuration (structure) capable of starting the rotation of the arm 32 after moving the lock pin 40 at the lock position to the unlock position.

[0097] The first arm portion 34 may be formed separately from the lid 30, or may be integrally formed with the second arm portion 35.

Explanation of Reference Numerals

[0098] 1 Side panel 2 Feeding port 10 Lid opening / closing device 15 Power supply connector (feeding / receiving portion) 15a Connection portion 20 Base 21 Base body 21a Insertion hole 21b Opening 22 Mounting part 22a Concave part 22b Mounting port 23 Sealing member 24 Bearing part 25 End wall part 25a First arrangement part 25b Second arrangement part 25c Third arrangement part 25d Shaft part 25e Sensor mounting part 25f Stopper 25g Positioning convex part 25h First groove 25i Second groove 26 End wall part 26a Shaft hole 27 Side wall part 28 Cover 28a Mounting piece 28b Through hole 30 Lid 30a Convex part 31 Sealing member 32 Arm 34 First arm part 34a Continuous part 35 Second arm part 35a Cylindrical part 35b Mounting hole 36 Pivoting part 37 Spindle 37a Mounting part 37b Flange part 37c Shaft part 37d Shaft part 38 Engagement groove (engagement part) 38a Base surface 38b Contact surface 38c Regulation surface 38d Guide surface 39 Concave part 40 Lock pin (locking member) 40a Cylindrical part 40b Lock pin body 41 Engagement convex part 41a Tip part 42 Cam follower 42a Chamfered portion 43 Mounting portion 44 Torsion spring (biasing member) 44a Winding portion 44b First arm portion 44c Second arm portion 45 Wire 50 Drive mechanism 51 Motor 52 Input cam 52a Body 52b Connection portion 52c Axial hole 53 Notch 53a Cam surface (cam) 53b Opposing surface 53c Inner peripheral surface 54 Protrusion 60 Differential mechanism 61 Gap α Angle range of the cam β Angle range of the protrusion of the differential mechanism γ Angle range of the recess of the differential mechanism

Claims

1. A base disposed inside the receiving port of the panel, a lid for closably closing the receiving port, having a pivot portion on one end pivotally supported by the base, a continuous portion on the other end connected to the lid, and an engaging portion provided on the pivot portion, and being movable between a retracted position where it retracts into the panel and the receiving port is closed by the lid and an extended position where it protrudes outside the panel and the receiving port is opened, an arm; a rotating body that transmits the driving force received from the drive source to the pivot portion and moves the arm between the retracted position and the extended position; a locking member pivotally supported by the base adjacent to the pivot portion, and being rotatable about a rotation axis extending along the rotation axis of the pivot portion between a locked position where it engages with the engaging portion and an unlocked position where the engagement with the engaging portion is released when the arm is in the retracted position; a cam that is rotatable in conjunction with the rotating body and transmits the rotational force of the rotating body to rotate the locking member in the locked position to the unlocked position side when moving the arm in the retracted position to the extended position; a differential mechanism for starting the rotation of the pivot portion with a delay with respect to the start of rotation of the rotating body when moving the arm in the retracted position to the extended position A lid opening and closing device comprising the above.

2. The rotating body is disposed adjacent to the pivot portion along the rotation axis of the pivot portion, the rotating body is provided with a notch that recesses inward from the outer peripheral surface of the rotating body within an angular range where the engaging portion is exposed when viewed from the direction in which the rotation axis of the pivot portion extends, the cam is formed of one of a pair of wall surfaces facing each other in the circumferential direction around the rotation axis of the pivot portion among the notches, the locking member includes an engaging convex portion that can engage with the engaging portion, and a cam follower provided adjacent to the engaging convex portion along the rotation axis of the pivot portion and capable of contacting the cam, The lid opening and closing device according to claim 1.

3. When viewed from the direction in which the rotation axis of the pivot portion extends, the pivot portion is circular, the engaging portion is a groove-shaped recess inward from the outer peripheral surface of the pivot portion and has a contact surface extending in the radial direction of the pivot portion, the engaging convex portion has a tip portion with a cross-sectional arc shape against which the contact surface can contact, and extends in a direction intersecting the contact surface when the locking member is in the locked position, The lid opening and closing device according to claim 2.

4. When the lock member is in the locked position, the engaging convex portion is located at a first rotation angle position extending in a direction orthogonal to the contact surface, or at a second rotation angle position rotated closer to the rotation axis of the pivot portion than the first rotation angle position. The lid opening and closing device according to claim 3.

5. The lid opening and closing device according to claim 4, further comprising a stopper that restricts rotation of the lock member beyond the locked position.

6. When viewed from the direction in which the rotation axis of the pivot portion extends, the engaging convex portion protrudes closer to the rotation axis of the pivot portion than the cam follower. When moving the arm in the retracted position to the advanced position, the lock member is rotated from the locked position toward the unlocked position by the sliding contact between the cam follower and the cam, and then is rotated to the unlocked position by the sliding contact between the engaging convex portion and the outer end portion of the engaging portion. The lid opening and closing device according to any one of claims 2 to 5.

7. The differential mechanism includes a convex portion provided on one of the pivot portion and the rotating body, and a concave portion provided on the other of the pivot portion and the rotating body, with the convex portion disposed inside. and has The angular range of the convex portion around the rotation axis of the pivot portion is smaller than the angular range of the concave portion around the rotation axis of the pivot portion. There is a gap with a defined differential angular range between the convex portion and the concave portion in the circumferential direction around the rotation axis of the pivot portion. By the rotation of the rotating body, the opposing surfaces of the convex portion and the concave portion in the circumferential direction come into contact and press against each other, causing the pivot portion to rotate. The lid opening and closing device according to any one of claims 1 to 6.

8. The base has a first placement portion for rotatably placing the rotating body, and a second placement portion that communicates with the first placement portion and rotatably places the lock member. The first placement portion and the second placement portion are covered by a cover having a through hole that penetrates the connection portion between the drive source and the rotating body. The lid opening and closing device according to any one of claims 1 to 7.

9. The lid opening and closing device according to any one of claims 1 to 8, further comprising a biasing member that biases the lock member in the unlocked position to the locked position.

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