JP2021078307A - Opening and closing member driving device and toilet lid opening and closing unit - Google Patents

Abstract

To provide an opening and closing member driving device capable of suppressing reduction of rigidity of an output axis even in the case of providing a load generation mechanism for holding an opening and closing member at a predetermined rotational angle position around an axial line of an output axis.SOLUTION: An opening and closing member driving device 1 includes a load generation mechanism 73 that applies a load to an output axis 7 when the output axis 7 passes through a predetermined rotational angle position. The load generation mechanism 73 comprises: a first rod-like member 39 inserted into a notch groove 19a formed in a cylindrical part 19 of a case positioned at an external peripheral side of the output axis 7; an elastic member that contacts to the first rod-like member 39 from an external side of the cylindrical part 19 to project the first rod-like member 39 from the cylindrical part 19 to a radial direction inner side; and a projection part 47 projected to a radial direction outer side from a first axial part 41 positioned at the radial direction inner side of the cylindrical part 19 in the output axis 7. Thus, the load generation mechanism 73 can suppress reduction of rigidity of the output axis 7 because it is provided to the outer side of the output axis 7.SELECTED DRAWING: Figure 3

Description

The present invention relates to an opening / closing member driving device that drives an opening / closing member, and a toilet lid opening / closing unit that opens / closes the toilet lid of a toilet unit as an opening / closing member.

Patent Document 1 describes an opening / closing member driving device that opens / closes an opening / closing member such as a toilet lid. The opening / closing member driving device of Patent Document 1 includes a motor, an output shaft, a transmission mechanism for transmitting the driving force of the motor to the output shaft, and a case for accommodating the motor and the transmission mechanism. The output shaft includes a protrusion protruding outward from an opening provided in the case and a base located inside the case. An opening / closing member is connected to the protruding portion. A gear portion that receives a driving force from a transmission mechanism is provided at an end portion of the base portion opposite to the protruding portion.

In addition, the opening / closing member drive device is a holding mechanism that prevents the opening / closing member from naturally returning to the prostrate position due to its own weight or the like when the opening / closing member such as the toilet lid is rotated from the prostrate position and opened in the upright position. To be equipped. The holding mechanism is configured on the inner peripheral side of the gear portion by utilizing the recess provided on the lower end surface of the gear portion.

The holding mechanism includes a fixing member having an annular portion. The fixing member is fixed to the case. The annular portion is arranged coaxially with the gear portion in the recess. Here, the output shaft includes a protruding portion that extends coaxially with the gear portion in the recess from the center of the bottom surface of the recess. The annular portion surrounds the protruding portion from the outer peripheral side. Further, the annular portion includes an opening extending in the axial direction. Further, the holding mechanism includes a first pin inserted into the opening in a state of being movable in the radial direction, a second pin fixed to the outer peripheral surface of the protruding portion, and an annular first pin arranged on the outer peripheral side of the annular portion. A coil spring that projects inward in the radial direction of the portion is provided. In the holding mechanism, when the output shaft passes a predetermined rotation angle position, the second pin moves the first pin radially outward against the urging force of the coil spring. Therefore, when the torque applied to the output shaft by the weight of the opening / closing member is smaller than the urging force of the coil spring, the opening / closing member connected to the output shaft can be held in a stopped state at a predetermined rotation angle position.

Japanese Unexamined Patent Publication No. 2014-400858

The coil spring of the holding mechanism expands in diameter to the outer peripheral side when the second pin moves the first pin radially outward. Therefore, it is necessary to provide a gap between the coil spring arranged in the recess of the output shaft and the peripheral wall surface of the recess. Therefore, in the configuration in which the holding mechanism is provided in the recess provided in the gear portion, the rigidity of the end portion of the output shaft tends to decrease. Here, the output shaft of the opening / closing member driving device opens / closes the opening / closing member connected to the protrusion in a cantilevered state. Therefore, a load is applied to the output shaft from the opening / closing member side. Further, the base portion is integrally provided with a gear portion that receives a driving force from the transmission mechanism. Therefore, a load is applied to the output shaft from the drive mechanism side. Therefore, in a configuration in which a recess is formed in the output shaft and a holding mechanism is provided inside the recess, the load applied to the output shaft may cause deformation of the output shaft.

In view of this point, an object of the present invention is to prevent the rigidity of the output shaft from being lowered even when a load generating mechanism for holding the opening / closing member at a predetermined rotation angle position around the axis of the output shaft is provided. Alternatively, it is an object of the present invention to provide an opening / closing member driving device and a toilet lid opening / closing unit that can be suppressed.

In order to solve the above problems, the opening / closing member driving device of the present invention includes a motor, an output shaft to which the opening / closing member is connected, a transmission mechanism for transmitting the driving force of the motor to the output shaft, the motor, and the above. A case that houses the transmission mechanism, a partition member that is fixed to the inside of the case and partitions the inside of the case, and a load generation that applies a load to the output shaft when the output shaft passes a predetermined rotation angle position. When the mechanism is provided, the direction along the axis of the output shaft is the axial direction, the direction orthogonal to the axis is the radial direction, one side of the axial direction is the first direction, and the other side is the second direction. The output shaft includes a base portion located in the case and a protruding portion of the base portion protruding from the case in the second direction, and the case includes the partition member from the side in the second direction. A case portion is provided, the case portion includes an opening for passing the output shaft from the inside to the outside of the case, and a tubular portion extending the inside of the case coaxially with the opening, and the base portion is provided. A first shaft portion located inside the tubular portion in the radial direction and a second shaft portion located in the first direction of the tubular portion are provided, and the tubular portion is provided from an end in the first direction. The load generating mechanism includes a notch groove extending in the axial direction, and the load generating mechanism comes into contact with the rod-shaped member inserted into the notch groove in a state of being movable in the radial direction and the rod-shaped member from the outside of the tubular portion. The partition member is provided with an elastic member that projects the rod-shaped member radially inward from the tubular portion and a protrusion that projects radially outward from the first shaft portion, and the partition member has a through hole that penetrates the base portion. And an annular portion extending from the opening edge of the through hole in the axial direction and holding the end portion of the tubular portion in the first direction from the outer peripheral side, and the output shaft holds the predetermined rotation angle position. When passing through, the protrusions move the rod-shaped member outward in the radial direction against the urging force of the elastic member.

In the present invention, the load generating mechanism for holding the opening / closing member at a predetermined rotation angle position around the axis of the output shaft is inserted into a notch groove formed in the tubular portion of the case located on the outer peripheral side of the output shaft. A rod-shaped member, an elastic member that contacts the rod-shaped member from the outside of the cylinder portion and projects the rod-shaped member radially inward from the cylinder portion, and a first shaft portion located radially inside the cylinder portion on the output shaft. It is provided with a protrusion that protrudes radially outward from the. As a result, since the load generating mechanism can be provided on the outside of the output shaft, it is possible to suppress a decrease in the rigidity of the output shaft as compared with the case where a recess is formed in the output shaft and the load generating mechanism is provided on the inside. .. Further, in the load generation mechanism, when the output shaft passes a predetermined rotation angle position, a protrusion protruding from the output shaft to the outer peripheral side moves the rod-shaped member radially outward against the urging force of the elastic member. .. Therefore, when the torque applied to the output shaft via the opening / closing member is smaller than the urging force of the elastic member, the load generating mechanism can hold the output shaft in a stopped state at a predetermined rotation angle position.

Here, when the output shaft passes through a predetermined rotation angle position, the protrusion moves around the axis in the circumferential direction. Therefore, when the protrusion moves the first rod-shaped member radially outward against the urging force of the elastic member, the protrusion pushes the first rod-shaped member to one side in the circumferential direction. Further, the first rod-shaped member pushed by the protrusion comes into contact with the inner wall on one side in the circumferential direction of the notch groove and tries to expand the notch groove. That is, when the output shaft passes through a predetermined rotation angle position, the protruding portion of the output shaft attempts to deform the tubular portion via the first rod-shaped member. If the cylinder is deformed, the load generating mechanism will not function. In response to such a problem, the partition member fixed in the case includes an annular portion that holds the end portion of the tubular portion through which the notch groove opens in the first direction from the outer peripheral side. Therefore, even when the output member repeatedly passes through the predetermined rotation angle position, it is possible to prevent or suppress the deformation or damage of the tubular portion.

In the present invention, the partition member can be made to have higher rigidity than the case. By doing so, it is easy to prevent the tubular portion provided in the case from being deformed.

In the present invention, the first shaft portion includes a contact portion having a circular contact surface that contacts the end portion of the tubular portion in the first direction from the inner peripheral side of the tubular portion, and the second direction of the contact portion. A small-diameter portion having an outer diameter smaller than that of the contact portion is provided, and the protrusion can be provided on the small-diameter portion. In this way, the end portion in the first direction of the tubular portion can be held in a state of being sandwiched from the radial direction by the annular portion of the partition member and the contact portion of the output shaft. Therefore, it is easy to suppress the deformation of the tubular portion.

In the present invention, the second shaft portion includes a large-diameter portion having an outer diameter larger than that of the contact portion, and a gear fixing portion in which the output gear of the transmission mechanism is fixed in the first direction of the large-diameter portion. The large-diameter portion includes a circular outer peripheral surface facing outward in the radial direction and an annular contact surface that abuts the tubular portion from the first direction side, and the annular portion includes the first ring portion. From the direction side toward the second direction, a bearing portion that rotatably supports the large diameter portion and a tubular portion holding portion that holds the tubular portion may be provided. In this way, the output shaft to which the output gear is fixed can be rotatably supported by the partition member having high rigidity.

The case is made of resin, the partition member is made of metal, and the radial thickness dimension of the tubular portion is shorter than the radial dimension of the rod-shaped member, and the circular contact surface and the circular shape are formed. The radial separation distance from the outer peripheral surface is the same as the radial thickness dimension of the tubular portion, and the inner peripheral surface of the tubular portion holding portion and the inner peripheral surface of the bearing portion are in the axial direction. It can be continuous without steps. In this way, the rigidity of the partition member can be made higher than the rigidity of the case. Further, in this way, by bending the metal partition member by burring or the like, the partition member can be provided with an annular portion having a tubular portion holding portion and a bearing portion.

In the present invention, the output shaft is provided with a circular recess recessed in the second direction on the end surface in the first direction, and the case is inserted into the circular recess to rotatably support the output shaft. When viewed from a direction orthogonal to the axis, the strut portion and the bearing portion can overlap. By doing so, it is possible to prevent or suppress the inclination of the output shaft.

In the present invention, the output shaft includes a resin output shaft main body and a second rod-shaped member fixed to the output shaft main body to form the protrusion, and the first rod-shaped member and the second rod-shaped member. The member can be made of metal. In this way, it is possible to prevent or suppress the protrusion from coming into contact with the first rod-shaped member and being worn.

Next, the toilet lid opening / closing unit of the present invention may have the above-mentioned opening / closing member driving device, and the opening / closing member may be a toilet lid.

Since the present invention includes a load generating mechanism, the toilet lid can be held at a predetermined rotation angle position against its own weight and the like. Further, since the load generation mechanism is provided on the outside of the output shaft and it is easy to secure the rigidity of the output shaft, deformation of the output shaft can be prevented or suppressed.

Since the opening / closing member driving device of the present invention includes a load generating mechanism, the opening / closing member such as a toilet lid connected to the output shaft can be held at a predetermined rotation angle position. Further, since the load generating mechanism is provided on the outside of the output shaft and the rigidity of the output shaft can be ensured, the deformation of the output shaft can be prevented or suppressed. Further, when the output shaft passes through a predetermined rotation angle position, the protruding portion of the output shaft tries to deform the tubular portion of the case via the first rod-shaped member, but the partition member fixed in the case. Since the annular portion of the above holds the tubular portion from the outer peripheral side, it is possible to prevent or suppress the tubular portion from being deformed or damaged.

It is an external perspective view of the opening / closing member drive device. It is explanatory drawing of the toilet lid opening and closing unit. It is sectional drawing of the opening / closing member drive device. It is an exploded perspective view of the opening / closing member drive device. It is an exploded perspective view when the 2nd case, a partition member, a coil spring, an output shaft, and an output gear are seen from one side in the axial direction. It is an exploded perspective view when the 2nd case, a partition member, a coil spring, an output shaft, and an output gear are seen from the side opposite to FIG. 5 in the axial direction. It is a perspective view when the motor, the transmission mechanism and the output shaft are seen from one side in the axial direction. It is a perspective view when the motor, the transmission mechanism and the output shaft are seen from the side opposite to FIG. 7 in the axial direction. It is a perspective view when the intermediate case is seen from one side in the axial direction. FIG. 3 is a cross-sectional view taken along the line AA of FIG.

Hereinafter, embodiments of the toilet lid opening / closing unit of the present invention will be described with reference to the drawings.

(overall structure)
FIG. 1 is an external perspective view of the opening / closing member driving device. FIG. 2 is an explanatory view of the toilet lid opening / closing unit. FIG. 3 is a cross-sectional view of the opening / closing member driving device. FIG. 4 is an exploded perspective view of the opening / closing member driving device. FIG. 5 is an exploded perspective view of the second case, the partition member, the coil spring, the output shaft, and the output gear when viewed from one side in the axial direction. FIG. 6 is an exploded perspective view of the second case, the partition member, the coil spring, the output shaft, and the output gear when viewed from the side opposite to FIG. 5 in the axial direction. FIG. 7 is a perspective view of the motor, the transmission mechanism, and the output shaft when viewed from one side in the axial direction. FIG. 8 is a perspective view of the motor, the transmission mechanism, and the output shaft when viewed from the opposite side of FIG. 7 in the axial direction. FIG. 9 is a perspective view of the intermediate case when viewed from one side in the axial direction. FIG. 10 is a cross-sectional view taken along the line AA of FIG.

The opening / closing member driving device 1 shown in FIG. 1 opens / closes by rotating an opening / closing member such as a lid or a door. In the toilet lid opening / closing unit 3 shown in FIG. 2, the toilet lid 201 of the toilet unit 200 is connected to the opening / closing member driving device 1 as an opening / closing member. More specifically, the toilet unit 200 has a toilet body 202, a toilet seat 203, a toilet lid 201, and a tank 204. The end portion of the toilet lid 201 on the side of the tank 204 is connected to the output shaft 7 of the opening / closing member driving device 1. The toilet lid 201 moves between a closed position where it lies flat and covers the toilet body 202 and an open position where it rises from the toilet body 202 due to the rotation of the output shaft 7. A second opening / closing member driving device 1 may be provided in the toilet unit 200, and the toilet seat 203 may be connected to the output shaft 7 of the second opening / closing member driving device 1 as an opening / closing member.

As shown in FIG. 3, the opening / closing member driving device 1 includes a motor 6, an output shaft 7 to which the toilet lid 201 is connected, a transmission mechanism 8 for transmitting the driving force of the motor 6 to the output shaft 7, the motor 6, and the motor 6. It has a case 9 for accommodating the transmission mechanism 8 and a case 9.

The output shaft 7 includes a protruding portion 11 protruding from the case opening 10 of the case 9, and a base portion 12 housed in the case 9. The end of the toilet lid 201 is connected to the protruding portion 11 of the output shaft 7. Therefore, the opening / closing member driving device 1 opens / closes the toilet lid 201 in a cantilevered state. As shown in FIG. 1, the case 9 has an elongated shape in one direction when viewed from a direction along the axis L of the output shaft 7. The output shaft 7 projects outward from the longitudinal end of the case 9.

In the following description, the three directions orthogonal to each other are the X-axis direction, the Y-axis direction, and the Z-axis direction. The Z-axis direction is the axial direction along the axis L of the output shaft 7, the Y-axis direction is the longitudinal direction of the case 9, and the X-axis direction is the lateral direction of the case 9. In the Z-axis direction, the side on which the output shaft 7 protrudes is the + Z direction, and the opposite side is the −Z direction. Further, one side in the X-axis direction is the −X direction, and the other side is the + X direction. One side in the Y-axis direction is the −Y direction, and the other side is the + Y direction. The output shaft 7 projects from the end portion of the case 9 in the + Y direction in the Y-axis direction to the outside of the case 9. Further, the direction around the axis L is the circumferential direction, and the direction orthogonal to the axis L is the radial direction.

(Case and reinforcement)
The case 9 is made of resin. As shown in FIG. 1, the case 9 includes a first side wall 13 and a second side wall 14 extending parallel to the Y-axis direction. Further, the case 9 includes a third side wall 15 that extends in the X-axis direction and connects the end of the first side wall 13 in the −Y direction and the end of the second side wall 14 in the −Y direction. Further, the case 9 includes a fourth side wall 16 connecting the ends in the + Y direction. The fourth side wall 16 has a shape in which the space between the first side wall 13 and the second side wall 14 projects in the + Y direction.

Further, as shown in FIGS. 1 and 3, the case 9 includes a first case 21, an intermediate case 22, and a second case 23 arranged along the Z-axis direction. The first case 21 is located in the −Z direction of the intermediate case 22, and the second case 23 is located in the + Z direction of the intermediate case 22.

As shown in FIG. 4, the first case 21 includes a bottom wall portion 25 which is an end surface of the case 9 in the −Z direction, and a first frame portion 26 extending in the + Z direction from the outer peripheral edge of the bottom wall portion 25. The first frame portion 26 constitutes the end side portions of the first side wall 13, the second side wall 14, the third side wall 15, and the fourth side wall 16 of the case 9 in the −Z direction. The motor 6 is fixed to the first case 21. The motor 6 includes a motor main body 28, a rotating shaft 27 protruding from the motor main body 28, and a pair of motor terminals 29 protruding from the motor main body 28 on the opposite side of the rotating shaft 27. The output shaft 7 is located in the −Y direction of the motor body 28. The rotation shaft 27 faces in a direction intersecting the axis L of the output shaft 7. In this example, the rotation axis 27 faces in a direction orthogonal to the axis L of the output axis 7. Further, the rotating shaft 27 is inclined with respect to the Y-axis direction (longitudinal direction of the case 9) when viewed from the Z-axis direction. The tip of the rotating shaft 27 is rotatably supported by the bearing member 30.

The intermediate case 22 includes an intermediate bottom portion 31 and an intermediate frame portion 32 extending in the + Z direction from the outer peripheral edge of the intermediate bottom portion 31. The intermediate frame portion 32 constitutes an intermediate portion in the Z-axis direction of the first side wall 13, the second side wall 14, the third side wall 15, and the fourth side wall 16 of the case 9. The intermediate case 22 accommodates a part of the gears constituting the transmission mechanism 8. Further, the intermediate case 22 houses the base 12 of the output shaft 7.

A partition member 35 that partially partitions the inside of the case 9 is fixed to the end portion of the intermediate case 22 on the side of the second case 23. The partition member 35 is made of metal and has higher rigidity than the case 9. In this example, the partition member 35 is a sheet metal. As shown in FIGS. 5 and 6, the partition member 35 is bent in the + Z direction from the partition member through hole 35a through which the base 12 of the output shaft 7 penetrates in the Z-axis direction and the opening edge of the partition member through hole 35a. An extending annular portion 36 is provided. As shown in FIG. 4, a potentiometer 37 is attached to the partition member 35. The potentiometer 37 is located at an end portion opposite to the output shaft 7 in the Y-axis direction.

The second case 23 (case portion) is covered with the partition member 35 from the + Z direction and fixed to the intermediate case 22. The second case 23 covers the partition member 35 from the + Z direction.

The second case 23 includes a plate portion 17 that defines an end surface of the case 9 in the + Z direction, and a second frame portion 24 that extends in the −Z direction from the outer peripheral edge of the plate portion 17. The second frame portion 24 constitutes the end side portions of the first side wall 13, the second side wall 14, the third side wall 15, and the fourth side wall 16 of the case 9 in the + Z direction. The plate portion 17 includes a plate portion through hole 17a through which the output shaft 7 is penetrated. Further, the second case 23 has a shaft support portion 18 projecting in the + Z direction from the opening edge of the plate portion through hole 17a in the plate portion 17, and a shaft support portion 18 projecting in the −Z direction from the opening edge of the plate portion through hole 17a in the plate portion 17. The cylinder portion 19 and the cylinder portion 19 are provided. As shown in FIGS. 5 and 6, the plate through hole 17a, the shaft support portion 18, and the tubular portion 19 are provided coaxially. As shown in FIG. 5, the tubular portion 19 is formed with two notched grooves 19a extending in the + Z direction from the end in the first direction. Each notch groove 19a is provided at a rotation angle position separated by 180 ° around the axis L.

A cylindrical first rod-shaped member 39 is inserted into each notch groove 19a so as to be movable in the radial direction. The first rod-shaped member 39 is made of metal. The radial dimension of the first rod-shaped member 39 is longer than the radial dimension of the tubular portion 19. Further, as shown in FIG. 3, a coil spring 40 (elastic member) is arranged on the outer peripheral side of the tubular portion 19. The coil spring 40 contacts the first rod-shaped member 39 from the outside of the tubular portion 19 and projects the first rod-shaped member 39 radially inward from the tubular portion 19.

(Output shaft)
The output shaft 7 penetrates the plate through hole 17a, the shaft support portion 18 and the cylinder portion 19 inside the case 9, and extends from the case opening 10 which is the end of the shaft support portion 18 in the + Z direction to the outside of the case 9. Protrude. The base 12 of the output shaft 7 is housed in the second case 23 and the intermediate case 22. As shown in FIG. 6, the base portion 12 is formed from the first shaft portion 41 located inside the tubular portion 19 in the radial direction, the second shaft portion 42 located in the −Z direction from the tubular portion 19, and the tubular portion 19. Also includes a third axis portion 43 located in the + Z direction.

As shown in FIG. 3, the first shaft portion 41 contacts the contact portion 45 having a circular contact surface 45a that contacts the end portion of the tubular portion 19 in the −Z direction from the inner peripheral side in the + Z direction of the contact portion 45. A small diameter portion 46 having an outer diameter smaller than that of the portion 45 is provided. As shown in FIGS. 5 and 6, the small diameter portion 46 is provided with two protrusions 47 protruding outward in the radial direction. The two protrusions 47 are provided at two locations on the outer peripheral surface of the small diameter portion 46, which are separated by 180 ° around the axis L. Each protrusion 47 includes an outer peripheral surface of an arc curved in the circumferential direction. Each protrusion 47 extends in the Z-axis direction.

As shown in FIG. 6, the second shaft portion 42 includes a large diameter portion 48 having an outer diameter larger than that of the contact portion 45, and a gear fixing portion 49 provided in the −Z direction of the large diameter portion 48. .. The large-diameter portion 48 includes a circular outer peripheral surface 48a facing outward in the radial direction and an annular contact surface 48b facing the + Z direction. As shown in FIG. 3, the annular contact surface 48b abuts on the tubular portion 19 from the side in the −Z direction. As shown in FIGS. 5 and 6, the gear fixing portion 49 has a smaller outer diameter than the large diameter portion 48. The output gear 63 of the transmission mechanism 8 is coaxially fixed to the gear fixing portion 49.

The third shaft portion 43 includes a supported portion 50 having a circular outer peripheral surface facing outward in the radial direction, and a connecting portion 51 connecting the supported portion 50 and the protruding portion 11. In this example, on the circular outer peripheral surface of the supported portion 50, a recess recessed inward in the radial direction is provided at an angular position where the protrusion 47 is formed in the circumferential direction. As shown in FIG. 3, the supported portion 50 and the connecting portion 51 are located inside the shaft support portion 18 of the case 9 in the radial direction. The connecting portion 51 includes a tapered outer peripheral surface whose outer diameter decreases in the + Z direction from the circular outer peripheral surface of the supported portion 50.

Further, as shown in FIG. 5, the output shaft 7 is provided with a circular recess 52 recessed in the + Z direction on the end surface in the −Z direction. As shown in FIG. 3, the bottom surface of the circular recess 52 (the circular inner wall surface of the circular recess 52 in the + Z direction) is located between the large diameter portion 48 and the contact portion 45 in the Z-axis direction.

Here, in this example, the output shaft 7 is composed of a resin output shaft main body 55 and two metal second rod-shaped members 56 fixed to the output shaft main body 55 to form each protrusion 47. Become. That is, as shown in FIG. 6, the output shaft main body 55 includes a protruding portion 11, a contact portion 45, a small diameter portion 46, a large diameter portion 48, a gear fixing portion 49, a supported portion 50, and a connecting portion 51. Further, the output shaft main body 55 is provided with grooves 46a extending in the Z-axis direction at two locations in the circumferential direction of the outer peripheral surface of the small diameter portion 46. The cross section of each groove 46a is semicircular. Each of the two second rod-shaped members 56 has a cylindrical shape, and is fixed to the small diameter portion 46 with a portion inside in the radial direction inserted into each groove 46a. The output shaft 7 may be a single member made of resin. That is, each protrusion 47 is made of resin and may be integrally formed with the output shaft 7 so as to protrude from the small diameter portion 46.

(Transmission mechanism)
As shown in FIGS. 7 and 8, the transmission mechanism 8 has a worm 58, a first gear 59, a second gear 60, from the upstream side to the downstream side of the driving force transmission path from the motor 6 to the output shaft 7. A third gear 61, a fourth gear 62 (front gear), and an output gear 63 are provided. The worm 58 is fixed to the outer peripheral side of the rotating shaft 27. The worm 58 and the first gear 59 are located in the first case 21. The second gear 60, the third gear 61, the fourth gear 62, and the output gear 63 are located in the intermediate case 22. The worm 58, the first gear 59, the second gear 60, the third gear 61, the fourth gear 62, and the output gear 63 form a transmission path for transmitting the driving force of the motor 6 to the output shaft 7.

The first gear 59 is located in the + X direction of the rotating shaft 27 of the motor 6. The first gear 59 includes a first large-diameter gear 59a that meshes with the worm 58, and a first small-diameter gear 59b that is coaxial with the first large-diameter gear 59a and has an outer diameter smaller than that of the first large-diameter gear 59a. .. The first large-diameter gear 59a is located in the −Z direction of the first small-diameter gear 59b. The first gear 59 is rotatably supported by a first support shaft 65 extending in the Z-axis direction. The end portion of the first support shaft 65 in the −Z direction is held by the bottom wall portion 25 of the first case 21, and the end portion in the + Z direction is held by the intermediate bottom portion 31 of the intermediate case 22. As shown in FIG. 3, the first gear 59 includes a torque limiter 66 that connects and disconnects the transmission of the driving force between the first large-diameter gear 59a and the first small-diameter gear 59b.

As shown in FIGS. 7 and 8, the second gear 60 is coaxial with the second large-diameter gear 60a that meshes with the first small-diameter gear 59b and the second large-diameter gear 60a, and is outside the second large-diameter gear 60a. A second small-diameter gear 60b having a small diameter is provided. The second large-diameter gear 60a is located in the −Z direction of the second small-diameter gear 60b. The second large-diameter gear 60a meshes with the first small-diameter gear 59b via the intermediate case opening 33 provided in the intermediate bottom portion 31 of the intermediate case 22 (see FIGS. 3 and 9). The second gear 60 is rotatably supported by a second support shaft 68 extending in the Z-axis direction. The end portion of the second support shaft 68 in the −Z direction is held by the intermediate bottom portion 31 of the intermediate case 22, and the end portion in the + Z direction is held by the partition member 35.

The third gear 61 includes a third large-diameter gear 61a that meshes with the second small-diameter gear 60b, and a third small-diameter gear 61b that is coaxial with the third large-diameter gear 61a and has an outer diameter smaller than that of the third large-diameter gear 61a. Be prepared. The third large-diameter gear 61a is located in the −Z direction of the third small-diameter gear 61b. The third gear 61 is rotatably supported by a third support shaft 69 extending in the Z-axis direction. The end portion of the third support shaft 69 in the −Z direction is held by the intermediate bottom portion 31 of the intermediate case 22, and the end portion in the + Z direction is held by the second case 23. The third support shaft 69 penetrates the partition member 35.

The fourth gear 62 is a spur gear that meshes with the third small diameter gear 61b and the output gear 63. The fourth gear 62 and the output gear 63 are arranged in the Y-axis direction. The fourth gear 62 is arranged coaxially with the second gear 60 and is rotatably supported by the second support shaft 68. As shown in FIG. 3, the end portion of the second support shaft 68 in the −Z direction is held by the intermediate case 22, and the end portion in the + Z direction is held by the partition member 35. That is, as shown in FIG. 9, the intermediate bottom portion 31 of the intermediate case 22 includes a shaft holding portion 34 that holds the second support shaft 68 that supports the second gear 60 and the fourth gear 62. As shown in FIG. 4, the partition member 35 includes a shaft holding portion 70 that holds the second support shaft 68 that supports the second gear 60 and the fourth gear 62.

The output gear 63 is made of metal. The output gear 63 is coaxially fixed to the gear fixing portion 49 of the output shaft 7. That is, as shown in FIGS. 5 and 6, the output gear 63 is annular, and the gear fixing portion 49 of the output shaft 7 is inserted into the center hole thereof. A plurality of recesses 71 are provided in the circumferential direction on the inner peripheral surface of the output gear 63, and a plurality of recesses 71 fitted in the recesses 71 on the inner peripheral surface of the output gear 63 are provided on the outer peripheral surface of the gear fixing portion 49 of the output shaft 7. A convex portion 72 is provided. As a result, the output gear 63 and the output shaft 7 are coaxially connected around the axis L in a state in which they cannot rotate relative to each other.

(Support structure of output shaft)
As shown in FIGS. 3 and 9, the output shaft 7 is rotatably supported by a support column 81 projecting from the intermediate bottom 31 of the intermediate case 22 in the + Z direction. The strut portion 81 is provided coaxially with the case opening 10 of the second case 23. The tip of the support column 81 is inserted into the circular recess 52 of the output shaft 7. The tip of the support column 81 contacts the bottom surface of the circular recess 52 (the circular inner wall surface of the circular recess 52 in the + Z direction).

Further, as shown in FIG. 3, the output shaft 7 has a large diameter portion 48 rotatably supported by an annular portion 36 of the partition member 35. That is, the annular portion 36 includes a bearing portion 36a that contacts the base portion 12 from the outer peripheral side at the end side portion in the −Z direction. The bearing portion 36a rotatably supports the output shaft 7. When viewed from a direction orthogonal to the axis L, the end 81a of the support column 81 in the + Z direction overlaps with the bearing portion 36a. Further, in the output shaft 7, the supported portion 50 is rotatably supported from the outer peripheral side by the shaft supporting portion 18 of the second case 23.

When the large diameter portion 48 is rotatably supported by the annular portion 36 of the partition member 35 and the supported portion 50 is rotatably supported by the shaft support portion 18 of the second case 23, it is outside the output shaft 7. , A load generating mechanism 73 is configured between the large diameter portion 48 and the supported portion 50 in the Z-axis direction. As shown in FIG. 10, the load generating mechanism 73 projects radially outward from the first rod-shaped member 39 inserted into the notch groove 19a of the tubular portion 19, the coil spring 40, and the small diameter portion 46 of the base portion 12. A second rod-shaped member 56 (protrusion portion 47) is provided. In the load generation mechanism 73, when the output shaft 7 passes through a predetermined rotation angle position, the second rod-shaped member 56 moves the first rod-shaped member 39 radially outward against the urging force of the coil spring 40. Therefore, when the output shaft 7 passes through a predetermined rotation angle position around the axis L, a load corresponding to the urging force of the coil spring 40 is applied to the output shaft 7.

Here, as shown in FIG. 3, the annular portion 36 of the partition member 35 is a tubular portion holding portion 36b that holds the end portion of the tubular portion 19 in the −Z direction from the outer peripheral side on the + Z direction side of the bearing portion 36a. To be equipped. That is, the annular portion 36 holds the bearing portion 36a that rotatably supports the large diameter portion 48 of the output shaft 7 and the cylinder portion 19 that holds the cylinder portion 19 of the case 9 from the −Z direction side toward the + Z direction. A portion 36b and the like.

Further, the radial distance between the circular contact surface 45a of the contact portion 45 of the base portion 12 and the circular outer peripheral surface 48a of the large diameter portion 48 is the same as the radial thickness dimension of the tubular portion 19. Therefore, in the annular portion 36, the inner peripheral surface of the tubular portion holding portion 36b that contacts the tubular portion 19 and the inner peripheral surface of the bearing portion 36a that contacts the large diameter portion 48 of the output shaft 7 have no step in the Z-axis direction. Continuous.

(Fixed structure of partition member)
Next, the partition member 35 is fixed to the intermediate case 22 between the annular portion 36 and the shaft holding portion 70 in the Y-axis direction.

That is, as shown in FIG. 9, in the intermediate frame portion 32, the intermediate case 22 has a first protrusion that projects inward to the first frame portion 32a and the second frame portion 32b that extend parallel to the Y-axis direction, respectively. A portion 83 and a second protrusion 84 are provided. Screw holes are provided in each of the first protrusion 83 and the second protrusion 84. Further, the first frame portion 32a is provided with a rectangular first notch portion 32c at a position where the first protrusion 83 is provided. The second frame portion 32b includes a rectangular second notch portion 32d at a position where the second protrusion 84 is provided. The second frame portion 32b is a portion forming a part of the second side wall 14 of the case. The first protrusion 83 and the second protrusion 84 face each other in the X-axis direction.

On the other hand, as shown in FIG. 4, the partition member 35 includes a pair of projecting portions 35b and 35c projecting on both sides in the X-axis direction between the annular portion 36 and the shaft holding portion 70 in the Y-axis direction. Through grooves are provided in the protruding portions 35b and 35c. In the partition member 35, the protrusion 35b in the −X direction is inserted into the first notch 32c of the first frame portion 32a from the + Z direction and comes into contact with the first protrusion 83. Further, in the partition member 35, the protrusion 35c in the + X direction is inserted into the second notch 32d of the second frame portion 32b from the + Z direction and comes into contact with the second protrusion 84. Then, the partition member 35 penetrates the second case 23, and further penetrates the through groove of the protrusion 35b and is screwed into the screw hole of the first protrusion 83 by a screw (not shown), so that the intermediate case 22 is inserted. Is fixed to. Further, the partition member 35 is fixed to the intermediate case 22 by a screw 75 that penetrates the second case 23 and further penetrates the through groove of the protruding portion 35c and is screwed into the screw 75 hole of the second protrusion 84. Will be done.

With the partition member 35 fixed to the intermediate case 22, a gap 86 is partially provided between the partition member 35 and the first frame portion 32a, and between the partition member 35 and the second frame portion 32b. Is partially provided with a gap 87. That is, with the partition member 35 fixed to the case 9, a portion (gap 86) that is not in contact with each other is provided between the partition member 35 and the first side wall 13. Further, a portion (gap 87) that does not contact each other is provided between the partition member 35 and the second side wall 14.

(Potentiometer)
As shown in FIG. 7, the potentiometer 37 includes a potentiometer 91 that meshes with any one of a plurality of gears constituting the transmission mechanism 8. Further, the potentiometer 37 includes a detection unit 92 that detects the rotation angle position of the potentiometer gear 91. The potentiometer 91 is located in the −Z direction of the partition member 35 and meshes with the third small diameter gear 61b of the third gear 61. The detection unit 92 is fixed to the partition member 35 via the substrate 93. Here, wiring (not shown) for supplying electric power to the motor 6 is connected between the substrate 93 and the pair of motor terminals 29. A plurality of terminal pins 96 connected to the wiring and the potentiometer 37 are fixed to the substrate 93. As shown in FIG. 9, the intermediate case 22 includes a terminal pin holding portion 97 that holds the terminal pin 96 at the end of the intermediate frame portion 32 on one side Y1 in the Y-axis direction.

(motion)
When the motor 6 is driven in the forward direction or the reverse direction by the supply of electric power via the terminal pin 96, the driving force of the motor 6 is transmitted to the output shaft 7 via the transmission mechanism 8. Therefore, as shown in FIG. 2, the toilet lid 201 fixed to the output shaft 7 rotates in the closing direction A toward the closing position or the opening direction B (second rotation direction) toward the opening position. When the toilet lid 201 rotates, the potentiometer 37 outputs a signal corresponding to the rotation angle position of the toilet lid 201.

Here, the transmission mechanism 8 includes a torque limiter 66 on the first gear 59. Therefore, when an excessive load is applied to the transmission mechanism 8 from the toilet lid 201 via the output shaft 7, the torque limiter 66 functions to block the transmission of the driving force by the transmission mechanism 8. This prevents the transmission mechanism 8 from being damaged due to an excessive load from the outside.

Further, the opening / closing member driving device 1 includes a load generating mechanism 73. In the load generation mechanism 73, when the output shaft 7 passes through a predetermined rotation angle position, the second rod-shaped member 56 (protrusion portion 47) protruding from the output shaft 7 to the outer peripheral side resists the urging force of the coil spring 40. The first rod-shaped member 39 is moved outward in the radial direction. Therefore, the load generating mechanism 73 can hold the output shaft 7 in a stopped state at a predetermined rotation angle position when the torque applied to the output shaft 7 from the outside is smaller than the urging force of the coil spring 40. In this example, the predetermined rotation angle position is set to the rotation angle position where the toilet lid 201 is slightly moved to the closed position side from the vertically standing position. Further, the urging force of the coil spring 40 is set to be larger than the torque that the toilet lid 201 rotates toward the closed position due to the weight of the toilet lid 201 after the toilet lid 201 stands vertically. Therefore, the opening / closing member driving device 1 prevents the toilet lid 201 from naturally returning to the closed position even when the toilet lid 201 is tilted in the closing direction A due to its own weight after the toilet lid 201 is vertically erected.

(Action effect)
In this example, the load generating mechanism 73 includes the first rod-shaped member 39 inserted into the notch groove 19a formed in the tubular portion 19 of the case located on the outer peripheral side of the output shaft 7, and the first rod-shaped member 39 from the outside of the tubular portion 19. A coil spring 40 that comes into contact with a rod-shaped member 39 and causes the first rod-shaped member 39 to project radially inward from the tubular portion 19, and a first shaft portion 41 located radially inward of the tubular portion 19 on the output shaft 7. A protrusion 47 that protrudes outward in the radial direction is provided. Therefore, the load generating mechanism 73 is provided on the outside of the output shaft 7. Therefore, as compared with the case where the output shaft 7 is formed with a recess and the load generating mechanism 73 is provided inside the recess, it is possible to suppress a decrease in the rigidity of the output shaft 7. Therefore, deformation of the output shaft 7 can be prevented or suppressed.

Here, when the output shaft 7 passes through a predetermined rotation angle position, the protrusion 47 moves around the axis in the circumferential direction. Therefore, when the protrusion 47 moves the first rod-shaped member 39 radially outward, the protrusion 47 pushes the first rod-shaped member 39 to one side in the circumferential direction. Therefore, as shown in FIG. 10, the first rod-shaped member 39 pushed by the protrusion 47 comes into contact with the inner wall on one side of the notch groove 19a in the circumferential direction, and exerts a force F that pushes the notch groove 19a apart. Give. When the notch groove 19a is widened by this force F, the tubular portion 19 is deformed or damaged. In response to such a problem, the partition member 35 fixed in the case 9 includes an annular portion 36 that holds the end portion of the tubular portion 19 in which the notch groove 19a opens in the −Z direction from the outer peripheral side. Therefore, it is possible to prevent or suppress the deformation or breakage of the tubular portion 19.

Further, in this example, the partition member 35 has a higher rigidity than the case 9. Therefore, it is easy to prevent the tubular portion 19 provided in the case 9 from being deformed.

Further, the first shaft portion 41 of the output shaft 7 has a contact portion 45 having a circular contact surface 45a that contacts the end portion of the tubular portion 19 in the −Z direction from the inner peripheral side of the tubular portion 19, and a contact portion 45 minutes. A small diameter portion 46 having an outer diameter dimension smaller than that of the contact portion 45 minutes in the + Z direction of the above is provided. Further, the protrusion 47 is provided on the small diameter portion 46. Therefore, the annular portion 36 of the partition member 35 and the contact portion 45 of the output shaft 7 can hold the end portion of the tubular portion 19 in which the notch groove 19a is formed in the −Z direction in a state of being sandwiched from the radial direction. Therefore, it is easy to suppress the deformation of the tubular portion 19.

The case 9 is made of resin, and the partition member 35 is made of metal. Therefore, the rigidity of the partition member 35 can be made higher than the rigidity of the case 9. Further, the second shaft portion 42 includes a large diameter portion 48 having an outer diameter larger than that of the contact portion 45, and a gear fixing portion 49 in which the output gear of the transmission mechanism is fixed in the −Z direction of the large diameter portion 48. Be prepared. The large-diameter portion 48 includes a circular outer peripheral surface 48a facing outward in the radial direction and an annular contact surface 48b that abuts on the tubular portion 19 from the side in the −Z direction. The annular portion 36 includes a bearing portion 36a that rotatably supports the large diameter portion 48 from the −Z direction side toward the + Z direction, and a tubular portion holding portion 36b that holds the tubular portion 19. Further, the radial thickness dimension of the tubular portion 19 is shorter than the radial dimension of the first rod-shaped member 39, and the radial separation distance between the circular contact surface 45a and the circular outer peripheral surface 48a is the diameter of the tubular portion 19. It is the same as the thickness dimension in the direction, and the inner peripheral surface of the tubular portion holding portion 36b and the inner peripheral surface of the bearing portion 36a are continuous in the Z-axis direction without a step. Therefore, by bending the metal partition member 35 by burring or the like, an annular portion having a tubular portion holding portion 36b and a bearing portion 36a can be provided.

Further, the output shaft 7 is provided with a circular recess 52 recessed in the + Z direction on the end surface in the −Z direction, and the case 9 is provided with a support column 81 inserted into the circular recess 52 to rotatably support the output shaft 7. Further, when viewed from a direction orthogonal to the axis L, the strut portion 81 and the bearing portion 36a overlap. Therefore, it is possible to prevent or suppress the tilt of the output shaft 7.

Further, the output shaft 7 includes a resin output shaft main body 55 and a second rod-shaped member 56 fixed to the output shaft main body 55 to form a protrusion 47. The first rod-shaped member 39 and the second rod-shaped member 56 are made of metal. Therefore, when the output shaft 7 passes through the predetermined rotation angle position, it is possible to prevent or suppress the protrusion 47 and the first rod-shaped member 39 from coming into contact with each other and being worn.

Further, in this example, the output gear 63 and the fourth gear 62 are arranged along the Y-axis direction, and the partition member 35 is a case between the annular portion 36 and the shaft holding portion 70 in the Y-axis direction. It is fixed at 9. That is, in the partition member 35, a pair of protruding portions 35b and 35c located between the annular portion 36 and the shaft holding portion 70 in the Y-axis direction are fixed to the case 9. As a result, the partition member 35 is fixed to the case 9 at a position close to the output gear 63. Therefore, when a load is applied to the output gear 63 via the output shaft 7, the partition member 35 can be prevented from bending.

Further, the case 9 includes a first wall portion and a second side wall portion 14 arranged in the X-axis direction and extending in parallel with the Y-axis direction. The partition member 35 is arranged between the first side wall 13 and the second side wall 14, and a gap 86 is partially provided between the partition member 35 and the first side wall 13, and the partition member 35 and the partition member 35 are provided. A gap 87 is partially provided between the second side wall 14 and the second side wall 14. In this way, since the partition member 35 and the case 9 are provided with a portion that is not in contact with each other, the load applied from the output gear 63 to the partition member 35 is propagated to the case 9 via the output shaft 7. Can be suppressed.

Here, since the toilet lid opening / closing unit 3 of this example includes the load generating mechanism 73, the toilet lid 201 can be held at a predetermined rotation angle position. Further, since the load generating mechanism 73 is provided on the outside of the output shaft 7 and not on the inside of the recess provided in the output shaft 7, the deformation of the output shaft 7 can be prevented or suppressed.

1 ... Opening / closing member drive device, 3 ... Toilet lid opening / closing unit, 6 ... Motor, 7 ... Output shaft, 8 ... Transmission mechanism, 9 ... Case, 10 ... Case opening, 11 ... Protruding part, 12 ... Base, 13 ... No. 1 side wall, 14 ... 2nd side wall, 15 ... 3rd side wall, 16 ... 4th side wall, 17 ... plate part, 17a ... plate part through hole, 18 ... shaft support part, 19 ... cylinder part, 19a ... notch groove, 21 ... 1st case, 22 ... Intermediate case, 23 ... 2nd case, 24 ... 2nd frame, 25 ... Bottom wall, 26 ... 1st frame, 27 ... Rotating shaft, 28 ... Motor body, 30 ... Bearing Member, 31 ... Intermediate bottom, 32 ... Intermediate frame, 32a ... First frame, 32b ... Second frame, 32c ... First notch, 32d ... Second notch, 33 ... Intermediate case opening, 34 ... Shaft holding part, 35 ... Partition member, 35a ... Partition member through hole, 35b ... Protruding part, 35c ... Protruding part, 36 ... Ring part, 36a ... Bearing part, 36b ... Cylinder part holding part, 37 ... Potential meter, 39 ... 1st rod-shaped member, 41 ... 1st shaft part, 42 ... 2nd shaft part, 43 ... 3rd shaft part, 45 ... contact part, 46 ... small diameter part, 46a ... groove, 47 ... protrusion, 48 ... large diameter Part, 48a ... circular outer peripheral surface, 48b ... annular contact surface, 49 ... gear fixing part, 50 ... supported part, 51 ... connection part, 52 ... circular recess, 55 ... output shaft body, 56 ... second rod-shaped member, 58 ... worm, 59 ... first gear, 59a ... first large diameter gear, 59b ... first small diameter gear, 60 ... second gear, 60a ... second large diameter gear, 60b ... second small diameter gear, 61 ... third Gear, 61a ... Third large diameter gear, 61b ...
3rd small diameter gear, 62 ... 4th gear, 63 ... output gear, 65 ... 1st support shaft, 66 ... torque limiter, 68 ... 2nd support shaft, 69 ... 3rd support shaft, 70 ... shaft holder, 71 ... Concave part, 72 ... Convex part, 73 ... Load generation mechanism, 81 ... Strut part, 81a ... End of strut part, 83 ... First protrusion, 84 ... Second protrusion, 86 ... Gap, 87 ... Gap, 91 ... Potement Gear, 92 ... detector, 93 ... board, 96 ... terminal pin, 97 ... terminal pin holder, 200 ... toilet unit, 201 ... toilet lid, 202 ... toilet body, 202 ... toilet body, 203 ... toilet seat, 204 ... tank , L ... Axis

Claims (8)

With the motor
The output shaft to which the opening / closing member is connected and
A transmission mechanism that transmits the driving force of the motor to the output shaft,
A case for accommodating the motor and the transmission mechanism, and
A partition member fixed to the inside of the case and partitioning the inside of the case,
It has a load generating mechanism that applies a load to the output shaft when the output shaft passes a predetermined rotation angle position.
When the direction along the axis of the output shaft is the axial direction, the direction orthogonal to the axis is the radial direction, one side of the axial direction is the first direction, and the other side is the second direction, the output shaft is described as described above. A base located in the case and a protrusion protruding from the case in the second direction of the base are provided.
The case includes a case portion that covers the partition member from the side in the second direction.
The case portion includes an opening that allows the output shaft to penetrate from the inside to the outside of the case, and a tubular portion that extends the inside of the case coaxially with the opening.
The base portion includes a first shaft portion located inside the tubular portion in the radial direction and a second shaft portion located in the first direction of the tubular portion.
The tubular portion includes a notch groove extending in the axial direction from the end in the first direction.
The load generating mechanism comes into contact with the rod-shaped member inserted into the notch groove in a state where it can move in the radial direction and the rod-shaped member from the outside of the tubular portion to bring the rod-shaped member in the radial direction from the tubular portion. An elastic member projecting inward and a protrusion projecting radially outward from the first shaft portion are provided.
The partition member includes a through hole that penetrates the base portion and an annular portion that extends from the opening edge of the through hole in the axial direction and holds the end portion of the tubular portion in the first direction from the outer peripheral side. ,
An opening / closing member driving device, characterized in that, when the output shaft passes through the predetermined rotation angle position, the protrusion moves the rod-shaped member radially outward against the urging force of the elastic member. The opening / closing member driving device according to claim 1, wherein the partition member has a higher rigidity than the case. The first shaft portion includes a contact portion having a circular contact surface that contacts the end portion of the cylinder portion in the first direction from the inner peripheral side of the cylinder portion, and the contact portion in the second direction of the contact portion. With a small diameter part with a smaller outer diameter than
The opening / closing member driving device according to claim 1 or 2, wherein the protrusion is provided on the small diameter portion. The second shaft portion includes a large-diameter portion having an outer diameter larger than that of the contact portion, and a gear fixing portion in which the output gear of the transmission mechanism is fixed in the first direction of the large-diameter portion.
The large-diameter portion includes a circular outer peripheral surface facing outward in the radial direction and an annular contact surface that abuts on the tubular portion from the side in the first direction.
The annular portion includes a bearing portion that rotatably supports the large diameter portion from the side in the first direction toward the second direction, and a tubular portion holding portion that holds the tubular portion. The opening / closing member driving device according to claim 3. The case is made of resin and
The partition member is made of metal and is made of metal.
The radial thickness dimension of the tubular portion is shorter than the radial dimension of the rod-shaped member.
The radial separation distance between the circular contact surface and the circular outer peripheral surface is the same as the radial thickness dimension of the tubular portion.
The opening / closing member driving device according to claim 4, wherein the inner peripheral surface of the tubular portion holding portion and the inner peripheral surface of the bearing portion are continuous without a step in the axial direction. The output shaft is provided with a circular recess recessed in the second direction on the end face in the first direction.
The case includes a strut portion that is inserted into the circular recess and rotatably supports the output shaft.
The opening / closing member driving device according to claim 4 or 5, wherein the support column portion and the bearing portion overlap when viewed from a direction orthogonal to the axis line. The output shaft includes a resin output shaft main body and a second rod-shaped member fixed to the output shaft main body to form the protrusion.
The opening / closing member driving device according to any one of claims 1 to 6, wherein the second rod-shaped member and the rod-shaped member are made of metal. The opening / closing member driving device according to any one of claims 1 to 7 is provided.
The opening / closing member is a toilet lid opening / closing unit.

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