Electrically-driven type lock device of opening / closing body

Abstract

To provide an electrically-driven type lock device of opening / closing body capable of stabilizing a rotation operation of a wheel in a return direction.SOLUTION: An electrically-driven type lock device 10 includes a lock part, a rod, energization means, and an actuator 20. The actuator 20 includes a motor 22, a wheel 60 and a rotor 80. The wheel 60 includes a pressing surface 75 for pressing the rotor 80 when rotating being interlocked with the motor 22. The rotor 80 includes a reception surface 95 for receiving a pressing force from the pressing surface 75. A contact surface M between the reception surface 95 and the pressing surface 75 is provided so that a reaction force F2 acting on the pressing surface 75 from the reception surface 95 becomes in a direction gradually separated from a meshing portion S of teeth 23a of a drive gear 23 and wheel teeth 65.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to an electric locking device for an opening / closing body, which is attached to an opening of a fixed body so as to be able to open and close the opening, for locking the opening / closing body in a closed state. [Background technology]

[0002] For example, an opening formed in a fixed body such as a glove box of an automobile is provided with an opening / closing body such as a lid that can be opened and closed. A locking device is provided between the opening and the opening / closing body, which locks the opening / closing body when it is closed and unlocks the opening / closing body when it is opened. A locking device that uses an electric actuator to unlock the opening / closing body is also known.

[0003] For example, the following Patent Document 1 describes an electric locking device for an opening / closing body, which includes a pair of locking portions, a pair of rods that engage with and disengage from the locking portions, a biasing means that biases the rods in a direction to engage with the locking portions, and an actuator that disengages the pair of rods from the pair of locking portions, the actuator having a case, a motor arranged within the case, a worm gear fixed to the drive shaft of the motor, a wheel that has teeth that mesh with the worm gear and rotates in conjunction with the motor, and a rotor that disengages the rods from the locking portions, and the wheel is provided with a pressing portion that engages with a receiving portion provided on the rotor when the wheel rotates in a predetermined direction, and moves the rods in a direction to disengage from the locking portions.

[0004] In the above electric locking device, when the motor is turned on and the worm gear rotates, the wheel with teeth meshing with the worm gear rotates in a predetermined direction, the pressing part of the wheel presses the receiving part of the rotor, and the pair of rods disengage from the locking part against the biasing force of the biasing means. As a result, the opening / closing body is unlocked and the opening / closing body can be opened from the opening.

[0005] On the other hand, when the power to the motor is turned off, the rotor is urged to rotate by the force of the urging means, urging the pair of rods in the direction of engaging with the pair of locking portions, and the receiving portion of the rotor presses the pressing portion of the wheel, causing the wheel to rotate in the opposite direction to when the motor was energized, returning to the state it was in before the motor was energized. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] WO2022 / 185890A1 Summary of the Invention [Problem to be solved by the invention]

[0007] In the electric locking device for an opening / closing body of the above-mentioned Patent Document 1, the meshing state between the worm gear and the teeth of the wheel may change due to the rattle of the wheel, etc. In such a case, when the power supply to the motor is turned off, the rotational operation of the wheel may become unstable when the wheel rotates in the opposite direction to the rotation when the motor is powered on (returning direction) due to the biasing force of the biasing means.

[0008] SUMMARY OF THE PRESENT DISCLOSURE ... An object of the present invention is to provide an electric locking device for an opening / closing body that can stabilize the rotational movement of a wheel in the return direction. [Means for solving the problem]

[0009] In order to achieve the above object, the present invention provides an electric locking device for an opening / closing body that is attached to an opening of a fixed body in an openable / closable manner, the electric locking device comprising: a locking section provided on one of the opening / closing body or the fixed body; a rod that is disposed on the other of the opening / closing body or the fixed body and engages with and disengages from the locking section; a biasing means that directly or indirectly biases the rod in a direction in which the rod engages with the locking section; and an actuator that releases the engagement between the rod and the locking section, the actuator comprising: a motor having a drive gear; a wheel that is provided with wheel teeth that mesh with the teeth of the drive gear and that rotates in conjunction with the motor; and a biasing means that biases the rod in a direction in which the rod engages with the locking section. Therefore, the wheel and the rotor have the same rotational axis, the wheel has a pressing surface that presses the rotor to release the engagement between the rod and the locking portion when it rotates in conjunction with the motor, the rotor has a receiving surface with which the pressing surface comes into contact and which receives the pressing force from the pressing surface, and the contact surface between the receiving surface and the pressing surface is provided so that the reaction force acting on the pressing surface from the receiving surface is in a direction gradually moving away from the meshing portion between the teeth of the drive gear and the wheel teeth. Effect of the Invention

[0010] According to the present invention, the contact surface between the receiving surface and the pressing surface is provided so that the reaction force acting from the receiving surface to the pressing surface is in a direction gradually moving away from the meshing portion between the teeth of the drive gear and the teeth of the wheel, so that the meshing between the teeth of the drive gear and the teeth of the wheel can be made moderate while maintaining backlash, and as a result, the rotational movement of the wheel in the return direction after the engagement between the rod and the locking part can be stabilized. [Brief description of the drawings]

[0011] [Figure 1] 1 is an exploded perspective view showing one embodiment of an electric locking device for an opening / closing body according to the present invention, illustrating an actuator constituting the electric locking device. FIG. [Diagram 2] FIG. 2 is a perspective view of the actuator with a second case removed. [Diagram 3] FIG. [Figure 4] 2 is a perspective view of a wheel constituting the actuator, seen from a different direction than that in FIG. 1. [Diagram 5] FIG. 4 is a rear view of a wheel that constitutes the actuator. [Figure 6] 2 is a perspective view of a rotor that constitutes the actuator, seen from a direction different from that in FIG. 1. [Figure 7] FIG. 4 is a rear view of a rotor that constitutes the actuator. [Figure 8] FIG. 2 is a perspective view of a wheel and a rotor that constitute the actuator. [Figure 9] FIG. 2 is a rear view of the wheel and rotor that constitute the actuator. [Figure 10] 4 is a cross-sectional view taken along the line AA in FIG. 3. [Figure 11] FIG. 4 is a cross-sectional view taken along the line BB of FIG. [Figure 12] FIG. 4 is a cross-sectional view taken along the line indicated by the arrows DD in FIG. [Figure 13] 11 is an explanatory cross-sectional view of a state in which the rotor has rotated in a predetermined direction from the state shown in FIG. 10. FIG. [Figure 14] 12 is an explanatory cross-sectional view of a state in which the rotor has rotated in a predetermined direction from the state shown in FIG. 11. FIG. [Figure 15] 1 is an explanatory diagram of a case where the opening / closing body is locked in a closed state by the electric locking device for the opening / closing body according to the present invention; FIG. [Figure 16] 16 is an explanatory diagram of a case where the opening / closing body is unlocked from the closed state shown in FIG. 15. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] (One embodiment of an electric locking device for an opening / closing body) DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an electric locking device for an opening / closing body according to the present invention will be described with reference to the drawings.

[0013] As shown in Figures 15 and 16, the electric locking device 10 for an opening / closing body in this embodiment (hereinafter also simply referred to as the "electric locking device 10") locks an opening / closing body (not shown), such as a glove box, which is openably and closably attached to an opening 2 of a fixed body 1, such as an instrument panel of a vehicle, in a closed state with respect to the opening 2 of the fixed body 1, and electrically opens the opening / closing body in the locked state by an actuator 20.

[0014] The electric locking device 10 of this embodiment includes a pair of locking parts 3, 3 (see FIG. 15) provided at the opening 2 of the fixed body 1, a pair of rods 11, 12 slidably arranged on the opening / closing body side and engaged with and disengaged from the pair of locking parts 3, 3, a torsion spring 15 that indirectly urges the pair of rods 11, 12 in a direction that normally engages with the pair of locking parts 3, 3, and an actuator 20 that is arranged on the opening / closing body side and slides the pair of rods 11, 12 to release the engagement between the pair of rods 11, 12 and the pair of locking parts 3, 3. The torsion spring 15 forms the "urging means" of the present invention.

[0015] The actuator 20 also has a case 21 arranged on the opening / closing body side, a motor 22 arranged within the case 21 and having a drive gear 23, a wheel 60 provided with wheel teeth 65 that mesh with the teeth 23a of the drive gear 23 and which rotates in conjunction with the motor 22, and a rotor 80 that is rotatably supported within the case 21 and inside the wheel 60, to which a pair of rods 11, 12 are engaged and pivoted, and which disengages the pair of rods 11, 12 from the pair of locking sections 3, 3 through its rotational action.

[0016] As shown in FIG. 1, a motor 22 constituting an actuator 20 has a drive gear 23 fixed to a drive shaft 22a (the drive gear 23 is fixed to the drive shaft 22a in a rotation-restricted state).

[0017] The drive gear 23 is a so-called worm gear that extends a predetermined length and has spiral teeth 23a formed on its outer periphery. The teeth 23a of the drive gear 23 mesh with the wheel teeth 65 of the wheel 60, so that when the drive gear 23 rotates, the wheel 60 rotates in conjunction with it.

[0018] 10 and 11 show a state in which electricity is not supplied to the motor 22 and the drive gear 23 is not rotating (also referred to as a "motor non-energized state" in which the motor 22 is not energized), whereas Fig. 13 and 14 show a state in which electricity is supplied to the motor 22 and the drive gear 23 is rotating (also referred to as a "motor energized state" in which the motor 22 is energized).

[0019] Furthermore, an elastic member 26 made of an elastic material such as rubber is attached to the actuator 20 .

[0020] As described above, the electric locking device may be applied to, for example, a structure in which a box-shaped glove box is rotatably attached to an opening of an instrument panel (in this case, the instrument panel constitutes the "fixed body" and the glove box constitutes the "opening / closing body"), or to a structure in which a lid is attached to an opening of an instrument panel so that it can be opened and closed (in this case, the instrument panel constitutes the "fixed body" and the lid constitutes the "opening / closing body"), and may be used widely for various opening / closing bodies that open and close the opening of a fixed body.

[0021] 15, in this embodiment, a pair of hole-shaped locking portions 3, 3 are provided on both sides in the width direction of the opening 2 of the fixed body 1. However, the locking portions do not have to be hole-shaped, and may be recessed, protruding, frame-shaped, etc., and the locking portions may be provided on the opening / closing body instead of the fixed body, and are not particularly limited.

[0022] Furthermore, a switch (not shown) (such as a touch switch, push button switch, or lever switch) for operating the motor 22 is disposed at a predetermined position on the front surface side of the opening / closing body.

[0023] The torsion spring 15 also comprises a wound portion 16 formed by winding a wire rod, a first arm portion 17 protruding inward from one circumferential end of the wound portion 16, and a second arm portion 18 protruding inward from the other circumferential end of the wound portion 16.

[0024] In this embodiment, the first arm 17 is engaged with the spring engagement groove 39a of the first case 30, and the second arm 18 is engaged with the engagement surface 96 of the rotor 80, so that the rotor 80 is urged to rotate in a predetermined direction (details will be described later).

[0025] 10 and 15 means the direction of rotational bias of the rotor 80 by the torsion spring 15, which is the biasing means (the return direction, i.e., the direction in which the biasing means returns the rotor 80 to its original position after the driving of the rotary motor 22 is stopped), and is hereinafter also referred to simply as the "R1 direction." On the other hand, the rotation of the rotor 80 in the opposite direction to the rotational bias direction R1 is hereinafter also referred to simply as the "R2 direction."

[0026] 15 and 16, each of the rods 11, 12 is rod-shaped, and an engaging portion 13 having an inclined surface 13a is provided at the axial tip of each of the rods 11, 12, and these engaging portions 13, 13 are adapted to engage with and disengage from the pair of locking portions 3, 3. The engaging portion 13 may be provided not only at the tip of the rods 11, 12 but also midway in the axial direction.

[0027] In addition, the pair of rods 11, 12 have their base ends 14, 14 pivoted to the rotor 80, and the engagement portions 13, 13 at the tip end are biased in the direction of engaging with the pair of locking portions 3, 3 via the rotor 80 which is rotationally biased by a torsion spring 15 (see the arrows in Figure 15).

[0028] That is, in this embodiment, the pair of rods 11, 12 are indirectly biased to slide in a direction in which they normally engage with the pair of locking parts 3, 3 by the torsion spring 15, which is a biasing means. Note that the rods may be directly biased to slide in a direction in which they engage with the locking part 3 by the biasing means.

[0029] In addition, in this embodiment, the rods 11, 12 are slidably arranged on the opening / closing body, and the locking portion 3 is formed on the opening 2 side of the fixed body 1, but conversely, the rods may be slidably arranged on the fixed body side, and the locking portion may be provided on the opening / closing body side. Note that, although the rods 11, 12 in this embodiment consist of a pair, a single rod may also be used.

[0030] Furthermore, the wheel 60 and the rotor 80 are supported concentrically and rotatably in the case 21. That is, as shown in Figs. 10 to 14, the axis of the support shaft 38, the center of rotation of the rotor 80, and the center of rotation of the wheel 60 are aligned, and the support shaft 38, the wheel 60, and the rotor 80 share the same rotation axis C.

[0031] Also, as shown in Figures 10 and 13, the wheel 60 has a pressing surface 75 that, when rotated in conjunction with the motor 22, presses the rotor 80 to release the engagement between the rods 11, 12 and the locking portions 3, 3, and the rotor 80 has a receiving surface 95 with which the pressing surface 75 comes into contact and which receives the pressing force F1 from the pressing surface 75.

[0032] In the electric locking device 10, as shown in FIG. 10, a contact surface M between the receiving surface 95 and the pressing surface 75 is provided so that the reaction force F2 acting on the pressing surface 75 from the receiving surface 95 is in a direction gradually moving away from the meshing portion S between the teeth 23a of the drive gear 23 and the wheel teeth 65 (hereinafter, this configuration is also referred to as a "contact surface separation structure," but this will be described in detail in the explanation of the rotor 80).

[0033] Next, the case 21 constituting the actuator 20 will be described in detail.

[0034] As shown in FIG. 1, the case 21 of this embodiment is composed of a first case 30 and a second case 50 that is assembled to the first case 30.

[0035] As shown in FIG. 1, the first case 30 has a bottom wall 31 and a peripheral wall 32 standing upright from the periphery thereof, and forms a bottomed frame shape with an opening on the side facing the second case 50 (upper side).

[0036] The first case 30 has a motor arrangement section 33 in which the motor 22 is arranged, and a gear arrangement section 34 that is provided adjacent to the drive shaft 22a (see FIG. 1) side of the motor arrangement section 33 and in which the drive gear 23, the wheel 60, and the rotor 80 are arranged. In addition, a connector insertion section 35 is provided on one side of the motor arrangement section 33 of the first case 30, into which a power connector (not shown) that supplies electricity to the motor 22 is inserted.

[0037] Furthermore, a groove-shaped arrangement recess 36 is formed in the peripheral wall 32 on the gear arrangement portion 34 side, on the opposite side to the arrangement location of the drive gear 23, and a part of the elastic member 26 is accommodated therein (see FIG. 2). In addition, a plurality of engagement protrusions 32a for assembly with the second case 50 are protruded from predetermined locations on the outer periphery of the peripheral wall 32.

[0038] Furthermore, a substantially cylindrical support shaft 38 that rotatably supports the rotor 80 protrudes from the inner surface of the bottom wall 31 on the gear arrangement section 34 side. This support shaft 38 protrudes from the radial center via a protruding portion 37 that protrudes from the inner surface of the bottom wall 31. The support shaft 38 also extends perpendicular to the surface direction of the inner surface of the bottom wall 31, and has one protruding portion 38a protruding from the outer periphery of the tip end in the protruding direction.

[0039] Furthermore, the rotor 80 is rotatably supported by inserting the support shaft 38 into the shaft hole 81a of the rotor 80. Furthermore, the wheel 60 is rotatably supported by inserting the cylindrical wall 41 of the first case 30 inside the peripheral wall 62 of the wheel 60. The axis of the support shaft 38, the center of rotation of the rotor 80, and the center of rotation of the wheel 60 all coincide with each other and have the same rotation axis C.

[0040] Furthermore, a spring locking wall 39 is erected concentrically on the inner surface of the bottom wall 31 on the gear arrangement section 34 side and on the outer periphery of the support shaft 38. A notched spring locking groove 39a is formed in one circumferential position of this spring locking wall 39, and the first arm 17 of the torsion spring 15 is locked in this spring locking groove 39a.

[0041] Further, a generally cylindrical tubular wall 41 is provided on the inner surface of the bottom wall 31 on the gear arrangement section 34 side, on the outer periphery of the spring locking wall 39. A wheel 60 is supported for rotation by a tip end of the tubular wall 41 in the protruding direction.

[0042] On the other hand, the second case 50 assembled to the first case 30 has a ceiling wall 51 and a peripheral wall 52 extending vertically from the periphery thereof, and is shaped like a frame with an opening on the side facing the first case 30 (the lower side).

[0043] As shown in FIG. 1, the second case 50 is provided with a motor arrangement portion 53, a gear arrangement portion 54, and a connector insertion portion 55 at positions corresponding to the motor arrangement portion 33, the gear arrangement portion 34, and the connector insertion portion 35 of the first case 30, respectively.

[0044] Moreover, a circular opening 51a is formed in the ceiling wall 51 on the side of the gear arrangement section 34, through which the base 81 of the rotor 80 protrudes. Furthermore, a plurality of engagement pieces 52a are vertically provided on the outer periphery of the peripheral wall 52 at positions corresponding to the plurality of engagement protrusions 32a of the first case 30. The first case 30 and the second case 50 are assembled by engaging the plurality of engagement pieces 52a with the corresponding engagement protrusions 32a, thereby forming the case 21.

[0045] The motor 22 arranged in the motor arrangement space of the case 21 is electrically connected to a power connector (not shown) via a pair of bus bars 25, 25, and its drive shaft 22a is rotated by operating a switch (not shown) arranged on the surface side of the opening / closing body.

[0046] A cylindrical connector case 24, which is separate from the case 21, is attached to the connector insertion portions 35, 55 (see FIG. 1). A pair of bus bars 25, 25 are arranged in the connector case 24, and a power connector (not shown) for supplying electricity to the motor 22 is inserted into the connector case 24.

[0047] Furthermore, a notch 57a is formed in the peripheral wall 52 on the gear mounting portion 54 side, on the opposite side to where the drive gear 23 is mounted, at a position that matches the mounting recess 36 of the first case 30 (see FIG. 1). A protrusion 57 protrudes from the inner surface of the notch 57a, and the elastic member 26 is attached to the protrusion 57.

[0048] The above-described case is composed of a pair of cases 30 and 50, but may be a single member. Furthermore, the shape and structure of each part (bottom wall, peripheral wall, support shaft, spring locking wall, cylindrical wall, engaging protrusion, engaging piece, protruding piece, etc.) of each case is not limited to the above-described embodiment.

[0049] Next, the wheel 60 will be described in detail.

[0050] As shown in FIGS. 1, 8 and 9, the wheel 60 is separate from the rotor 80 and is rotatably supported by the case 21.

[0051] Furthermore, the wheel 60 has a pressing surface 75 which, when rotating in conjunction with the motor 22, presses the rotor 80, moving the rods 11, 12 in a direction away from the locking portion 3 against the biasing force of the torsion spring 15 which is a biasing means, thereby releasing the engagement between the rods 11, 12 and the locking portions 3, 3. Furthermore, the wheel 60 has a rotation axis C which is common to the support shaft 38 and the rotor 80.

[0052] As shown in Figures 4 and 5, the wheel 60 has an insertion hole 66 into which the shaft portion 83 of the rotor 80 is inserted, a notch portion 67 formed in part of the inner circumference of the insertion hole 66 into which the protrusion 90 of the rotor 80 fits, and a rib 71 that partially surrounds the outer periphery of the shaft portion 83 of the rotor 80.

[0053] More specifically, the wheel 60 of this embodiment has a substantially disk-shaped base 61 and a substantially cylindrical peripheral wall 62 extending from the periphery of the base 61 in the direction of the rotation axis of the wheel 60 (direction along the rotation axis C). The peripheral wall 62 extends perpendicularly to the base 61 from the periphery of the base 61 toward the bottom wall 31 of the first case 30.

[0054] 12, the wound portion 16 of the torsion spring 15 is disposed inside the peripheral wall 62 of the wheel 60. Furthermore, a pair of protrusions 63, 64 protrude from predetermined positions on the outer periphery of the peripheral wall 62. As shown in FIG. 10, when the motor is not energized, one of the protrusions 63 comes into contact with one end 26a of the elastic member 26, thereby restricting the rotational position of the wheel 60.

[0055] Also, as shown in FIG. 13, when the motor 22 operates and the drive gear 23 rotates, causing the wheel 60 to rotate to its maximum extent in the direction opposite to the rotational biasing direction of the rotor 80 (R1 direction) (R2 direction), the other protrusion 64 abuts against the other end 26b of the elastic member 26, thereby regulating the rotational position of the wheel 60.

[0056] Furthermore, on the outer periphery of the peripheral wall 62, between the pair of protruding portions 63, 64, wheel teeth 65 having a helical (slanted) shape that meshes with the teeth 23a of the drive gear 23, which is a worm gear, are formed. When the drive shaft 22a of the motor 22 is driven to rotate the drive gear 23, the wheel 60 rotates in the R2 direction in conjunction with the rotation of the drive gear 23.

[0057] Further, the portion where the teeth 23a of the drive gear 23 and the wheel teeth 65 mesh with each other constitutes the "meshing portion" in the present invention. In this embodiment, the portion surrounded by a rectangular frame with two-dot chain lines shown in Fig. 10 constitutes the meshing portion S. Furthermore, in this embodiment, the axis J of the worm gear which is the drive gear 23 coincides with the axis of the drive shaft 22a of the motor 22 (is arranged coaxially), but the meshing portion S is arranged approximately parallel to the axis J of the drive gear 23.

[0058] In addition, the configuration for rotating the wheel does not have to be a combination of a worm gear and helical wheel teeth. For example, a spur gear (spur teeth, helical teeth, etc.) can be fixed to the drive shaft of the motor, and spur-toothed wheel teeth (spur teeth, helical teeth, etc.) that mesh with this can be formed on the outer periphery of the wheel, as long as the wheel can be linked to the motor.

[0059] In addition, a stepped recess 62a is formed on the inner surface side of the tip of the peripheral wall 62 in the extending direction (see Figure 4), and the tip of the cylindrical wall 41 in the protruding direction fits into this recess 62a so that the wheel 60 is rotatably supported by the cylindrical wall 41.

[0060] Furthermore, as shown in Figures 4 and 5, an insertion hole 66 having an arc-shaped inner surface is formed in the radial center of the base 61, and a roughly fan-shaped cutout portion 67 is cut out and formed in part of the outer periphery of the insertion hole 66.

[0061] The arc-shaped inner peripheral surface of the insertion hole 66 is disposed facing the protruding portion 64. The cutout portion 67 is formed with an inner diameter dimension larger than the arc-shaped inner peripheral surface of the insertion hole 66, and has an inner peripheral surface 68 disposed facing the protruding portion 63.

[0062] 5, one circumferential end face 69 of the insertion hole 66 and the cutout portion 67 is a flat surface formed so as to be substantially parallel to a line segment L3 passing through the rotation axis C of the wheel 60. On the other hand, the other circumferential end face 70 of the insertion hole 66 and the cutout portion 67 is an inclined surface inclined at a predetermined angle with respect to L3 so as to fit with the inclined contact surface M constituting the contact surface separation structure.

[0063] A part of the shaft portion 83 provided on the base portion 81 of the rotor 80 is rotatably inserted into the insertion hole 66. Meanwhile, the remaining part of the shaft portion 83 of the rotor 80 is rotatably inserted into the cutout portion 67, and the protrusion 90 is also rotatably inserted therein.

[0064] In addition, a rib 71 having a generally arc-shaped wall shape is extended from the rear peripheral edge of the insertion hole 66 toward the bottom wall 31 of the first case 30. As shown in Figs. 8 and 9, this rib 71 is disposed radially outward of the shaft portion 83 of the rotor 80.

[0065] As shown in FIGS. 4 and 5, one circumferential end face 72 of the rib 71 is flat and disposed flush with one circumferential end face 69 of the cutout portion 67 .

[0066] On the other hand, the other circumferential end face 73 of the rib 71 is an inclined surface provided so as to be disposed on the same plane as the other circumferential end face 70 of the cutout portion 67. The other end face 73 which is the inclined surface of the rib 71 and the other end face 70 which is the inclined surface of the cutout portion 67 form the "pressing surface 75" in the present invention.

[0067] In addition, "66'" in Figure 5 is a virtual circle illustrated on an extension line of the insertion hole 66 and means the inner circumference of the insertion hole 66, but the pressing surface 75 is positioned outside the inner circumference 66' of the insertion hole 66, and the insertion hole 66 is not related to the formation of the pressing surface 75.

[0068] That is, the pressing surface 75 is an inclined surface that is formed so as to extend continuously from the other end surface 73 of the rib 71 to the other end surface 70 of the notch portion 67 .

[0069] The wheel described above is not limited to the above shape and structure, and may have any shape and structure as long as it has at least a pressing surface and can adopt the above-mentioned "contact surface separation structure." Note that the operation of the wheel 60 will be described later together with the operation of the rotor 80.

[0070] Next, the rotor 80 will be described in detail.

[0071] As shown in Figures 1 and 6 to 8, the rotor 80 is separate from the wheel 60, rotatably supported on the case 21, and rotatably arranged inside the wheel 60, so that it can perform two rotational movements: rotating in conjunction with the wheel 60, and rotating independently of the wheel 60 (which can also be called free rotation or free rotation).

[0072] The rotor 80 also has a shaft portion 83 having a circular outer periphery and a rotation axis C common to the support shaft 38 and the rotor 80, and a protrusion 90 protruding from the outer periphery of the shaft portion 83 and having a pair of side surfaces.

[0073] One side surface of the protrusion 90 comes into contact (abuts) with the pressing surface 75 provided on the wheel 60, forming a receiving surface 95 that receives the pressing force from the pressing surface 75. Here, one side surface of the protrusion 90 is located on a tangent L2 (see FIG. 7) to the outer periphery of the shaft portion 83 and extends along the tangent L2, forming the receiving surface 95. It can also be said that one side surface of the protrusion 90 is located on a tangent L2 to the outer periphery of the shaft portion 83 and extends continuously without any steps relative to the outer periphery of the shaft portion 83, forming the receiving surface 95.

[0074] Meanwhile, the other side surface of the protrusion 90 forms a locking surface 96 that locks with the second arm 18, which is one arm of the torsion spring serving as the biasing means. Note that although the locking surface 96 is located on a tangent to the outer periphery of the shaft 83, it does not extend along the tangent and is also different from the receiving surface 95 in that it is a surface that has a step with respect to the outer periphery of the shaft 83.

[0075] More specifically, the rotor 80 in this embodiment has a substantially disk-shaped base 81, a circular axial hole 81a formed in the radial center of the base 81, a substantially cylindrical peripheral wall 82 extending vertically from the periphery of the base 81 toward the bottom wall 31 of the first case 30, and a substantially cylindrical shaft 83 extending vertically from the rear periphery of the axial hole 81a on the rear side of the base 81.

[0076] 7, a plurality of ribs 84 extending radially from the center of rotation of the rotor 80 are provided on the back side of the base 81 between the peripheral wall 82 and the shaft portion 83. Here, four ribs 84 are provided at equal intervals in the circumferential direction.

[0077] 6 and 7, an inner protrusion 85 protrudes from the inner peripheral surface of the shaft portion 83. An axial notch 85a extending along the axial direction of the shaft portion 83 is formed by cutting out a part of the circumferential direction of the inner protrusion 85. A protrusion 38a provided on the support shaft 38 can be inserted into the axial notch 85a.

[0078] The shaft 38 provided in the first case 30 is inserted into the inner protruding portion 85 on the inner periphery of the shaft portion 83, so that the rotor 80 is rotatably supported by the first case 30 via the shaft 38.

[0079] 12, the upper end surface of the inward protruding portion 85 forms a stepped locking surface 85b. When an external force acts on the rotor 80 in a direction away from the bottom wall 31 of the first case 30, the protrusion 38a of the support shaft 38 locks onto this locking surface 85b, thereby preventing the rotor 80 from coming off.

[0080] In this embodiment, the spindle 38 is provided on the first case 30 side, and an axis portion 83 and an axis hole 81a into which the spindle 38 can be inserted are provided on the rotor 80 side. However, for example, a spindle may be provided on the second case 50 side to rotatably support the rotor 80, or a spindle may be provided on the rotor 80 side, and a support hole or the like into which the spindle can be inserted may be provided on the first case 30 or second case 50 side to rotatably support the rotor 80.

[0081] In addition, with the rotor 80 rotatably supported on the support shaft 38, the shaft portion 83 and the protrusion 90 are accommodated within the insertion hole 66 and the cutout portion 67 of the wheel 60 (see Figure 10), and the base 81 and the peripheral wall 82 of the rotor 80 are arranged on the front side of the base 61 of the wheel 60 (see Figure 12), thereby preventing the wheel 60 from slipping out.

[0082] 1, a pair of spherically bulging rod engagement portions 87, 87 are provided on the surface of the base portion 81 at locations facing each other in the circumferential direction of the rotor 80. The pair of rod engagement portions 87, 87 are inserted into and engaged with the base ends 14, 14 of the pair of rods 11, 12 in a non-removable state, whereby the base ends 14, 14 of the pair of rods 11, 12 are pivotally supported at locations facing each other with respect to the rotation axis C of the rotor 80.

[0083] Thereby, when the rotor 80 rotates, the pair of rods 11, 12 are configured to synchronously slide in opposite directions (in the directions in which the engagement portions 13, 13 are disengaged from the lock portions 3, 3) (see FIG. 16).

[0084] As shown in FIG. 6, a protrusion 90 is provided on the rear side of the base 81, protruding from the outer periphery of the shaft 83, and rotates within a notch 67 formed in the wheel 60.

[0085] This protrusion 90 has a first side portion 91 which is located on the tangent L2 to the outer periphery of the shaft portion 83 and has a side surface which extends continuously without any steps relative to the outer periphery of the shaft portion 83, a second side portion 92 which is arranged parallel to the first side portion 91 and at a predetermined distance, and a connecting portion 93 which connects the protruding tips of both side portions 91, 92 to each other and has a curved outer surface which fits the inner periphery 68 of the cutout portion 67.

[0086] The outer surface of the first side portion 91 forms a receiving surface 95 that comes into contact with the pressing surface 75 provided on the wheel 60 and receives the pressing force from the pressing surface 75, and the outer surface of the second side portion 92 forms an engaging surface 96 that engages with the second arm portion 18 of the torsion spring, which is the biasing means. The receiving surface 95 and the engaging surface 96 are parallel to each other (see FIG. 7).

[0087] In addition, the second arm 18 of the torsion spring 15 is engaged with the engagement surface 96, while the first arm 17 of the torsion spring 15 is engaged with the spring engagement groove 39a of the first case 30, and with the first arm 17 and the second arm 18 separated from each other, the rotor 80 is rotatably supported on the support shaft 38 on the first case 30 side.

[0088] Therefore, the rotor 80 is urged to rotate in a direction in which the second arm 18 approaches the first arm 17 of the torsion spring 15, i.e., in the direction of arrow R1 in Figures 10 and 15, so that the engagement portions 13, 13 of a pair of rods 11, 12 pivotally supported by the rotor 80 are urged in a direction in which they engage with the lock portions 3, 3.

[0089] 10, rotor 80, which is urged to rotate in the direction of arrow R1 by torsion spring 15, is configured so that receiving surface 95 thereof is in contact with pressing surface 75 of wheel 60 at all times, thereby restricting further rotation of rotor 80 in the direction of arrow R1. The surface where receiving surface 95 and pressing surface 75 come into contact with each other is referred to as "contact surface M" (see FIGS. 8 and 10).

[0090] Furthermore, the receiving surface 95 is adapted to come into contact with or separate from the pressing surface 75 of the wheel 60 when the rotor 80 rotates in a predetermined direction via the support shaft 38. Furthermore, when the rotor 80 rotates, the outer surface of the connecting portion 93 of the protrusion 90 rotates along the inner peripheral surface 68 of the notch portion 67 of the wheel 60, thereby guiding the rotation of the rotor 80.

[0091] The wheel 60 and rotor 80 configured as described above operate as follows.

[0092] FIG. 10 shows a state in which the opening 2 is closed by the opening / closing body, electricity is not supplied to the motor 22, and the drive gear 23 is not rotating, that is, the motor is not energized.

[0093] From this state, when the motor 22 is supplied with electricity and enters a motor energized state, the drive shaft 22a of the motor 22 rotates and the drive gear 23 rotates. Then, the wheel 60 rotates in the opposite direction (direction indicated by R2) to the rotational biasing direction (direction indicated by R1) of the rotor 80, and the pressing surface 75 that is in contact with (engaged in contact with) the receiving surface 95 presses the receiving surface 95.

[0094] As a result, as shown in Fig. 10, a pressing force F1 acts from the pressing surface 75 toward the receiving surface 95. This pressing force F1 is perpendicular to the contact surface M between the receiving surface 95 and the pressing surface 75. This causes the rotor 80 to rotate in the R2 direction as shown in Fig. 13. That is, both the rotor 80 and the wheel 60 rotate together in the R2 direction (they rotate together).

[0095] Then, the pair of rods 11, 12 pivotally supported by the rotor 80 slide in a direction in which the engagement portions 13, 13 of the pair of rods 11, 12 are disengaged from the pair of lock portions 3, 3 (see FIG. 16).

[0096] When the receiving surface 95 receives a pressing force F1 from the pressing surface 75, a reaction force F2 in the opposite direction acts from the receiving surface 95 to the pressing surface 75, as shown in FIG.

[0097] 13, the rotor 80 is again urged to rotate in the R1 direction, and the receiving surface 95 of the rotor 80 contacts and presses the pressing surface 75 of the wheel 60, causing the wheel 60 to rotate in the R1 direction. As a result, both the rotor 80 and the wheel 60 rotate in the R1 direction, and the rotor 80 and the wheel 60 return to the state shown in FIG.

[0098] At the same time, the pair of rods 11, 12 slide in a direction in which the engaging portions 13, 13 engage with the pair of locking portions 3, 3 (see FIG. 15).

[0099] In addition, in the state shown in Figure 10, that is, in a state in which the rods 11, 12 are urged in the direction of engaging with the locking portions 3, 3 by the torsion springs 15 serving as the urging means, when a force acting on the rotor 80 in a direction against the urging force of the urging means acts on the rotor 80 via the rods 11, 12, the receiving surface 95 moves in a direction away from the pressing surface 75, and the rotor 80 is configured to rotate independently of the wheel 60.

[0100] In the electric locking device 10, the following contact surface separation structure is adopted.

[0101] That is, Figure 10 shows the state when the motor is not energized and the wheel 60 and rotor 80 are viewed from the rotation axis C, and in this state, the contact surface M between the receiving surface 95 and the pressing surface 75 is configured so that the reaction force F2 (reaction force F2 in the opposite direction to the pressing force F1) acting from the receiving surface 95 to the pressing surface 75 gradually moves away from the meshing portion S between the teeth 23a of the drive gear 23 and the wheel teeth 65.

[0102] The above-mentioned reaction force F2 can also be said to be the force acting from the receiving surface 95 of the rotor 80 to the pressing surface 75 of the wheel 60 when the wheel 60 rotates in the R2 direction, which is the opposite direction to the rotational biasing direction R1 of the rotor 80, in conjunction with the rotation of the motor 22, and then rotates in the R1 direction (return direction) by the biasing means.

[0103] In this embodiment, the meshing portion S between the teeth 23a of the drive gear 23 and the wheel teeth 65 is arranged generally parallel to the axis J of the drive gear 23 as described above, but the contact surface M between the receiving surface 95 and the pressing surface 75 is arranged diagonally outward with respect to the arrangement direction of the meshing portion S (a direction generally parallel to the axis J) so that the reaction force F2 acting on the pressing surface 75 from the receiving surface 95 gradually moves away from the meshing portion S (i.e., so that the reaction force F2 does not move toward the meshing portion S).

[0104] In the above Patent Document 1, as shown in FIG. 13 of Patent Document 1, the contact surface between the receiving portion of the rotor and the pressing portion of the wheel is such that the reaction force acting from the receiving portion to the pressing portion is parallel to the meshing portion between the gear and the wheel teeth, and the reaction force is not in a direction that gradually moves away from the meshing portion between the gear and the wheel teeth, which differs from the contact surface separation structure of the present invention.

[0105] The contact surface spacing structure can also be expressed as follows.

[0106] In other words, the contact surface M between the receiving surface 95 and the pressing surface 75 is configured to be inclined with respect to the line segment L1 passing through the rotation axis C of the wheel 60 and the meshing portion S so that the reaction force F2 acting from the receiving surface 95 to the pressing surface 75 gradually moves away from the meshing portion S between the teeth 23a of the drive gear 23 and the wheel teeth 65.

[0107] In this embodiment, the line segment L1 passes through the rotation axis C and the meshing portion S of the wheel 60 and is perpendicular to the axial direction of the worm gear, which is the drive gear 23 (perpendicular to the axis J), and the contact surface M is inclined at a predetermined angle with respect to this line segment L1, resulting in a configuration in which the reaction force F2 gradually moves away from the meshing portion S.

[0108] Furthermore, if the drive gear is not a worm gear but a spur gear such as a straight or helical gear, the above-mentioned line segment passes through the rotational axis of the wheel and the meshing portion as well as the axis of the drive gear, and the above-mentioned contact surface is inclined at a predetermined angle relative to this line segment, so that the above-mentioned reaction force is directed away from the meshing portion.

[0109] In the above Patent Document 1, as shown in FIG. 13 of Patent Document 1, the contact surface between the receiving portion of the rotor and the pressing portion of the wheel is such that the reaction force acting from the receiving portion to the pressing portion is parallel to the meshing portion between the gear and the teeth of the wheel, and parallel to the line segment passing through the rotation axis of the wheel and the meshing portion, which differs from the contact surface separation structure of the present invention.

[0110] Furthermore, the contact surface spacing structure can also be expressed as follows.

[0111] In other words, the contact surface M between the receiving surface 95 and the pressing surface 75 is configured to be inclined with respect to a line segment passing through the rotation axis C and a predetermined point on the contact surface M a predetermined distance away from the rotation axis C, such as (a) a line segment L4 passing through the rotation axis C and a point M' on the contact surface M that is farthest from the rotation axis C, (b) a line segment L5 passing through the rotation axis C and a point M'' on the contact surface M that is closest to the rotation axis C, or (c) a line segment L6 passing through the rotation axis C and the point M' and the intermediate point between the point M'' on the contact surface M, so that the reaction force F2 acting from the receiving surface 95 on the pressing surface 75 is in a direction away from the meshing portion S between the teeth 23a of the drive gear 23 and the wheel teeth 65.

[0112] In this embodiment, as shown in Figures 11 and 12, the torsion spring 15, which is the biasing means, is arranged on the actuator 20 with its winding portion 16 twisted, and in the above state, the winding portion 16 is inclined with respect to the rotation axis C of the wheel 60 and the rotor 80, and is configured to apply a force that presses the wheel teeth 65 toward the meshing portion S.

[0113] That is, as shown in FIG. 12, the torsion spring 15 has its wound portion 16 positioned inside the peripheral wall 62 of the wheel 60 and inside the cylindrical wall 41 of the first case 30, and the first arm portion 17 is engaged with the spring engagement groove 39a of the first case 30 and the second arm portion 18 is engaged with the engagement surface 96 of the protrusion 90 of the rotor 80, so that the wound portion 16 is twisted and inclined with respect to the rotational axis C of the wheel 60 and the rotor 80.

[0114] At this time, as shown in FIG. 11, a pressing force F3 acts from the twisted winding portion 16 in a direction pressing the wheel teeth 65 toward the meshing portion S.

[0115] However, the reaction force F2 acting from the receiving surface 95 to the pressing surface 75 is configured to be greater than the pressing force F3. This reaction force F2 is in a direction gradually moving away from the meshing portion S between the teeth 23a of the drive gear 23 and the wheel teeth 65 (see FIG. 10), which can be said to be substantially opposite to the direction of the pressing force F3, and therefore acts to weaken the pressing force F3.

[0116] The rotor described above is not limited to the above-mentioned shape and structure, and may have any shape and structure as long as it has at least a receiving surface and can adopt the above-mentioned "contact surface separation structure."

[0117] (Action and effect) Next, the function and effect of the electric locking device 10 having the above structure will be described.

[0118] 15 shows a case where the opening 2 of the fixed body 1 is closed by the opening / closing body and locked in that state. That is, the engaging portions 13, 13 of a pair of rods 11, 12, which are slidably biased via a rotor 80 which is rotationally biased in the R1 direction by a torsion spring 15 serving as a biasing means, engage with a pair of locking portions 3, 3, so that the opening 2 of the fixed body 1 is locked in the closed state by the opening / closing body.

[0119] When the opening / closing body is to be opened from the opening 2 of the fixed body 1 in this state, a switch (not shown) is operated. Then, electricity is supplied to the motor 22 from a power connector connected to a power source (not shown) via the bus bars 25, 25, driving the drive shaft 22a of the motor 22 to rotate the drive gear 23, and in conjunction with this, the wheel 60 rotates in the R2 direction against the biasing force of the torsion spring 15.

[0120] As a result, the pressing surface 75 of the wheel 60 presses the receiving surface 95 of the rotor 80, and both the rotor 80 and the wheel 60 rotate in the R2 direction as shown in Figures 13 and 14, so that the pair of rods 11, 12 slide in a direction in which the engaging portions 13, 13 disengage from the pair of locking portions 3, 3 as shown in Figure 16. As a result, the engaging portion 13 is disengaged from the locking portion 3, so that the opening / closing body can be opened from the opening 2 of the fixed body 1.

[0121] In addition, when the motor is de-energized after the opening 2 of the fixed body 1 is opened, the drive shaft 22a of the motor 22 stops and the drive gear 23 stops rotating, so that the rotor 80 is again urged to rotate in the R1 direction by the force of the torsion spring 15.

[0122] As a result, the receiving surface 95 of the rotor 80 presses the pressing surface 75 of the wheel 60, causing both the rotor 80 and the wheel 60 to rotate in the R1 direction, returning the rotor 80 and the wheel 60 to the state shown in Figure 10, and the pair of rods 11, 12 slide in the direction in which the engagement portions 13, 13 engage with the pair of locking portions 3, 3.

[0123] When the opening / closing body is pushed into the opening 2 from the above state, the inclined surfaces 13a of the engaging portions 13 of each rod 11, 12 are pressed against the inner edge of the opening 2, and the pair of rods 11, 12 are pulled inward of the opening / closing body against the biasing force of the torsion spring 15. After that, each engaging portion 13, 13 engages with the pair of locking portions 3, 3, respectively, so that the opening 2 of the fixed body 1 can be locked again in a closed state by the opening / closing body (see Figure 15).

[0124] In the electric locking device 10, as shown in FIG. 10, a contact surface M between the receiving surface 95 and the pressing surface 75 is provided so that a reaction force F2 acting on the pressing surface 75 from the receiving surface 95 gradually moves away from the meshing portion S between the tooth 23a of the drive gear 23 and the wheel tooth 65 when the motor is not energized.

[0125] That is, since the contact surface M between the receiving surface 95 and the pressing surface 75 is configured as described above, the meshing between the teeth 23a of the drive gear 23 and the wheel teeth 65 can be made moderate while maintaining backlash.

[0126] As a result, after the engagement between the pair of rods 11, 12 and the locking portions 3, 3 is released, the rotation of the wheel 60 in the return direction (R2 direction) becomes smooth, and the rotational movement of the wheel 60 in the return direction can be stabilized, so that the sliding movement of the engagement portions 13, 13 of the pair of rods 11, 12 in the direction of engaging with the pair of locking portions 3, 3 can be smoothed.

[0127] In addition, in this embodiment, the rotor 80 has a shaft portion 83 whose outer periphery is circular and has a rotation axis C, and a protrusion 90 which protrudes from the outer periphery of the shaft portion 83 and has a pair of side surfaces, one side surface of the protrusion 90 being located on a tangent L2 (see Figure 7) to the outer periphery of the shaft portion 83 and extending along the tangent L2, and the one side surface forms a receiving surface 95.

[0128] According to the above-described embodiment, since the protrusion 90 of the rotor 80 is configured as described above, the reaction force F2 acting in a direction gradually moving away from the meshing portion S between the teeth 23a of the drive gear 23 and the wheel teeth 65 can be effectively applied to the pressing surface 75 of the wheel 60 while ensuring the rigidity of the protrusion 90 (the reaction force F2 can be effectively applied to the pressing surface 75).

[0129] Furthermore, in this embodiment, the biasing means is a torsion spring 15 having a winding portion 16 and a pair of arms 17, 18 extending from both ends of the winding portion 16, and the rotor 80 has a shaft portion 83 having a rotation axis C, and a protrusion 90 protruding with the same width from the outer periphery of the shaft portion 83 and having a pair of side surfaces, one of the side surfaces forming a receiving surface 95 and the other side surface forming a locking surface 96 with which one arm (second arm portion 18) of the biasing means engages.

[0130] According to the above embodiment, since the protrusion 90 of the rotor 80 is configured as described above, the second arm 18, which is one arm of the torsion spring 15, which is the biasing means, can be easily engaged with the engaging surface 96 of the protrusion 90 while ensuring sufficient rigidity of the protrusion 90, thereby improving the ease of assembly of the electric locking device 10.

[0131] In addition, in this embodiment, the rotor 80 has a shaft portion 83 having a rotation axis C, and a protrusion 90 protruding from the outer periphery of the shaft portion 83 and having a pair of side surfaces, and the wheel 60 has an insertion hole 66 into which the shaft portion 83 is inserted, a cutout portion 67 formed in part of the inner periphery of the insertion hole 66 and into which the protrusion 90 fits, and a rib 71 that partially surrounds the outer periphery of the shaft portion 83, and the pressing surface 75 is an inclined surface formed to extend continuously from the end face (other end face 73) of the rib 71 to the end face (other end face 70) of the cutout portion 67.

[0132] According to the above embodiment, since the pressing surface 75 has the above-mentioned configuration, it is possible to ensure a wide pressing surface 75. As a result, when the wheel 60 rotates in the R2 direction by the driving of the motor 22, the pressing force F1 from the pressing surface 75 of the wheel 60 can be stably applied to the receiving surface 95 of the rotor 80, and the reaction force F2 from the receiving surface 95 of the rotor 80 can be stably applied to the pressing surface 75 of the wheel 60.

[0133] Furthermore, in this embodiment, the biasing means is a torsion spring 15 having a winding portion 16 and a pair of arms 17, 18 extending from both ends of the winding portion 16, and the biasing means is arranged on the actuator 20 with the winding portion 16 in a twisted state, and in this state the winding portion 16 is inclined with respect to the rotation axis C of the wheel 60 and the rotor 80, and a force (pressing force F3) is applied that presses the wheel teeth 65 toward the meshing portion S (see Figure 11).

[0134] According to the above embodiment, even when a pressure F3 is applied to press the wheel teeth 65 toward the meshing portion S, the reaction force F2 acts to gradually move the teeth 23a of the drive gear 23 and the wheel teeth 65 away from the meshing portion S, so that the pressing force F3 can be weakened by the reaction force F2.

[0135] As a result, even when the torsion spring 15 is used as the biasing means, the wheel teeth 65 can be engaged with the teeth 23a of the drive gear 23 while ensuring an appropriate backlash, making the return rotation of the wheel 60 smoother and further stabilizing the rotational operation.

[0136] It should be noted that the present invention is not limited to the above-described embodiment, and various modified embodiments are possible within the scope of the gist of the present invention, and such embodiments are also included in the scope of the present invention. [Explanation of symbols]

[0137] 1 Fixed body 2 Opening 3 Locking section 10 Electric locking device for opening and closing body (electric locking device) 11,12 Rod 15 Torsion spring (biasing means) 16 Winding section 17 1st arm 18 Second arm 20 Actuator 21 cases 22 Motor 23 Drive gear 23a Tooth 30 Case 1 38 Spindle 50 Case 2 65 Wheel Teeth 66 Insertion hole 67 Notch 71 Ribs 75 Pressing surface 80 rotors 83 Shaft 90 Protrusion 95 Receiving surface 96 Locking surface

Claims

1. An electric locking device for an opening / closing body that is openably and closably attached to an opening of a fixed body, A lock portion provided on one of the opening / closing body or the fixed body; a rod that is disposed on the other of the opening / closing body or the fixed body and engages with and disengages from the lock portion; a biasing means for directly or indirectly biasing the rod in a direction in which the rod engages with the locking portion; an actuator that releases the engagement between the rod and the locking portion, the actuator includes a motor having a drive gear, a wheel having wheel teeth that mesh with teeth of the drive gear and that rotates in conjunction with the motor, and a rotor that engages and disengages the rod from the lock portion by a rotating motion; The wheel and the rotor have the same rotation axis, the wheel has a pressing surface that, when rotated in conjunction with the motor, presses the rotor to release the engagement between the rod and the locking portion, the rotor has a receiving surface with which the pressing surface comes into contact and which receives a pressing force from the pressing surface, An electric locking device for an opening / closing body, characterized in that a contact surface between the receiving surface and the pressing surface is provided so that a reaction force acting from the receiving surface to the pressing surface is in a direction gradually moving away from the meshing portion between the teeth of the drive gear and the wheel teeth.

2. the rotor has a shaft portion having a circular outer periphery and provided with the rotation axis, and a protrusion protruding from the outer periphery of the shaft portion and provided with a pair of side surfaces, 2. The electric locking device for an opening / closing body according to claim 1, wherein one of the side surfaces of the protrusion is located on a tangent to the outer periphery of the shaft portion and extends along the tangent, the one side surface forming the receiving surface.

3. The biasing means is a torsion spring having a winding portion and a pair of arms extending from both ends of the winding portion, the rotor has a shaft portion on which the rotation axis is provided, and a protrusion protruding from an outer periphery of the shaft portion by the same width and having a pair of side surfaces, 3. The electric locking device for an opening / closing body according to claim 1, wherein one of said side surfaces forms said receiving surface, and the other side surface forms an engaging surface with which one of said arm portions of said biasing means engages.

4. The rotor has a shaft portion on which the rotation axis is provided, and a protrusion protruding from an outer periphery of the shaft portion and having a pair of side surfaces, the wheel has an insertion hole into which the shaft portion is inserted, a notch portion formed in a part of an inner periphery of the insertion hole and into which the protrusion is inserted, and a rib partially surrounding an outer periphery of the shaft portion, 3. The electric locking device for an opening / closing body according to claim 1, wherein the pressing surface is an inclined surface formed so as to extend continuously from an end face of the rib to an end face of the notch.

5. the biasing means is a torsion spring having a winding portion and a pair of arms extending from both ends of the winding portion, and the biasing means is disposed on the actuator in a state in which the winding portion is twisted, 3. An electric locking device for an opening / closing body as described in claim 1 or 2, wherein in the above-mentioned state, the winding portion is inclined with respect to the rotational axis of the wheel and the rotor, and a force is applied to press the wheel teeth toward the meshing portion.

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