JP2016147025A - Electric device for opening and closing, and opening and closing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric device for opening and closing capable of mechanically easing a sudden increase in a rotation speed in rotating an output shaft, and an opening and closing instrument equipped with the electric device for opening and closing.SOLUTION: An electric device 1 for opening and closing includes an output shaft 43 to which an opening/closing member such as a toilet seat is connected, a motor 80, a gear train 90 for transmitting rotation drive force of the motor 80 to the output shaft 43 and rotating the output shaft 43 in an opening direction and in a closing direction around an axis line L. The electric device 1 for opening and closing is provided with a brake mechanism 1a consisting of a liquid damper device 10 and an energizing member 70 consisting of a coil spring. The brake mechanism 1a generates brake force against the rotation of the output shaft 43 when the output shaft 43 rotates to at least one side around the axis line L.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an opening / closing electric device for driving an opening / closing member such as a lid or a toilet seat, and an opening / closing device including the opening / closing electric device.

  Opening and closing electric device having a motor and a gear train for transmitting the driving force of the motor to an output shaft and rotating the output shaft in an opening direction and a closing direction around the axis when automatically opening and closing a toilet seat or the like of a Western-style toilet Has been proposed. In such an opening / closing electric apparatus, the posture of the toilet seat connected to the output shaft is switched between the flat posture and the standing posture by rotating the output shaft around the axis (see Patent Document 1).

JP 2014-200458 A

  When the toilet seat is switched between the prone posture and the standing posture, the magnitude of the force for rotating the toilet seat in the closing direction changes due to the gravity applied to the toilet seat. Therefore, when the toilet seat is switched from the standing posture to the prone posture, the rotational speed of the toilet seat increases as the toilet seat approaches the prone posture, while when the toilet seat is switched from the prone posture to the standing posture, the toilet seat is upright. As the posture approaches, the rotational speed of the toilet seat increases. Therefore, in order to moderate the change in the rotation speed of the toilet seat and to rotate the toilet seat smoothly, the angular position of the toilet seat and the output shaft is monitored by a potentiometer or the like, and the current (voltage) supplied to the motor based on the monitoring result There is a problem that the circuit configuration becomes complicated.

  In view of the above-described problems, an object of the present invention is to provide an opening / closing electric device that can mechanically relieve a rapid increase in rotational speed when rotating an output shaft, and the opening / closing electric device. It is to provide a switchgear.

  In order to solve the above-described problems, an opening / closing electric device according to the present invention transmits an output shaft, a motor, and a rotational driving force of the motor to the output shaft so that the output shaft is opened and closed around an axis. A gear train that rotates in a direction, and a braking mechanism that generates a braking force that resists rotation of the output shaft when the output shaft rotates to at least one side around the axis.

  In the present invention, when the rotational driving force of the motor is transmitted to the output shaft via the gear train, the output shaft rotates around the axis, and the opening / closing member connected to the output shaft can be driven in the opening direction and the closing direction. it can. Here, the opening / closing electric device to which the present invention is applied is provided with a braking mechanism that generates a braking force against the rotation of the output shaft when the output shaft rotates. Even if a force that rotates the opening / closing member is applied during the driving or when the force required to drive the opening / closing member is reduced, the rapid increase in the rotation speed of the opening / closing member is suppressed. The opening / closing member (output shaft) can be smoothly rotated. Therefore, it is not necessary to control the angle position of the opening / closing member (output shaft) with a potentiometer, etc., and to switch the current (voltage) supplied to the motor based on the monitoring result, thus simplifying the circuit configuration. Can be achieved.

  In the present invention, the braking mechanism may employ a configuration that generates the braking force when the output shaft rotates to one side and the other side around the axis.

  In the present invention, the brake mechanism can employ a configuration in which at least a fluid damper device is used.

  In this case, the fluid damper device includes a cylindrical damper case in which a partition convex portion protrudes radially inward from an inner peripheral wall, a rotor shaft that is inserted inside the damper case and rotates integrally with the output shaft, Preferably, the damper case includes a fluid filled in the damper case, and a valve body that is supported by the rotor shaft and moves by pressure received from the fluid as the rotor shaft rotates. According to this configuration, since the fluid damper device can be provided coaxially with the output shaft (rotor shaft), the opening / closing electric device can be reduced in size.

  In the present invention, it is possible to employ a configuration in which a centrifugal brake that generates at least the braking force when rotating integrally with a gear included in the gear train is used for the braking mechanism.

  In this case, it is preferable that the centrifugal brake includes a brake member that includes an arm portion that is displaced radially outward when it rotates integrally with the gear and slides on the fixed body. According to this configuration, the braking mechanism can be configured with a simple configuration.

  In the present invention, it is possible to employ a configuration in which an aerodynamic brake that generates the braking force by an air resistance received when rotating integrally with a gear included in the gear train can be employed for the braking mechanism. . According to this configuration, the braking mechanism can be configured with a simple configuration.

  In the present invention, it is possible to employ a configuration in which at least the urging member that applies the braking force to the output shaft is used for the braking mechanism. According to this configuration, the braking mechanism can be configured with a simple configuration.

  In this case, the urging member is preferably a torsion coil spring. According to this configuration, the braking mechanism can be configured with a simple configuration.

  In the present invention, it is preferable that constant current driving or constant voltage driving is performed in the motor regardless of the angular position of the output shaft during the period of driving the output shaft.

  In an open / close device provided with an open / close electric device to which the present invention is applied, the output shaft adopts a configuration in which an open / close member that switches between a prone posture and a standing posture as the output shaft rotates is connected. Can do.

  In the present invention, the opening / closing member is, for example, a toilet seat of a Western-style toilet.

In the present invention, when the rotational driving force of the motor is transmitted to the output shaft via the gear train, the output shaft rotates around the axis, and the opening / closing member connected to the output shaft can be driven in the opening direction and the closing direction. it can. Here, the opening / closing electric device to which the present invention is applied is provided with a braking mechanism that generates a braking force against the rotation of the output shaft when the output shaft rotates. Even if a force that rotates the opening / closing member is applied during the driving or when the force required to drive the opening / closing member is reduced, the rapid increase in the rotation speed of the opening / closing member is suppressed. The opening / closing member (output shaft) can be smoothly rotated. Therefore, it is not necessary to control the angle position of the opening / closing member (output shaft) with a potentiometer, etc., and to switch the current (voltage) supplied to the motor based on the monitoring result, thus simplifying the circuit configuration. Can be achieved.

It is explanatory drawing of the western style toilet unit using the electric device for opening and closing to which this invention is applied. It is a perspective view of the electric device for opening and closing which concerns on Embodiment 1 of this invention. It is sectional drawing of the fluid damper apparatus used for the electric device for opening and closing which concerns on Embodiment 1 of this invention. It is explanatory drawing of the rotor axis | shaft of the fluid damper apparatus used for the opening / closing electric apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the internal structure of the damper chamber of the fluid damper apparatus used for the electric device for opening and closing which concerns on Embodiment 1 of this invention. It is explanatory drawing of the modification 1 of the fluid damper apparatus used for the electric device for opening and closing which concerns on Embodiment 1 of this invention. FIG. 7 is an explanatory diagram of a gap between a valve body and an inner peripheral wall when a rotor shaft rotates in a second direction in Modification Example 1 of the fluid damper device used in the opening / closing electric device according to Embodiment 1 of the present invention. It is explanatory drawing of the modification 2 of the fluid damper apparatus used for the electric device for opening and closing which concerns on Embodiment 1 of this invention. It is a perspective view inside the electric device for opening and closing which concerns on Embodiment 2 of this invention. It is explanatory drawing of the centrifugal brake (braking mechanism) used for the electric device for opening and closing which concerns on Embodiment 2 of this invention. It is explanatory drawing of the torque limiter used for the opening / closing electric apparatus which concerns on Embodiment 2 of this invention. It is a disassembled perspective view of the fluid damper apparatus used for the opening / closing electric apparatus which concerns on Embodiment 2 of this invention. It is sectional drawing which cut | disconnected the fluid damper apparatus used for the electric device for opening and closing which concerns on Embodiment 2 of this invention along the surface orthogonal to the axis line L. FIG. It is explanatory drawing of the valve body of the fluid damper apparatus used for the electric device for opening and closing which concerns on Embodiment 2 of this invention. It is explanatory drawing of the modification of the fluid damper apparatus used for the electric device for opening and closing which concerns on Embodiment 2 of this invention. It is explanatory drawing of the braking mechanism used for the electric device for opening and closing which concerns on Embodiment 3 of this invention.

  With reference to the drawings, an opening / closing device including the opening / closing electric device according to the embodiment of the present invention will be described. Moreover, in the following description, it demonstrates centering on the case where a switchgear is a western style toilet bowl. In the following description, the direction in which the output shaft 43 and the rotor shaft 40 extend is defined as the axis L direction, and in the axis L direction, the side opposite to the side where the output shaft 43 protrudes from the damper case 20 is one side. The side where the output shaft 43 protrudes from the damper case 20 will be described as the other side L2.

[Embodiment 1]
(Overall configuration of the opening / closing device and the opening / closing electric device 1)
FIG. 1 is an explanatory view of a Western-style toilet unit 100 using an opening / closing electric apparatus 1 to which the present invention is applied. 2 is a perspective view of the opening / closing electric device 1 according to Embodiment 1 of the present invention.
(A), (b) is the perspective view which looked at the opening / closing electric device 1 from the other side L2 of the axis L direction, respectively, and the exploded perspective view which looked at the opening / closing electric device 1 from the other side L2 of the axis L direction.

  A western toilet unit 100 shown in FIG. 1 includes a western toilet 2 (open / close device) and a water tank 3. The western toilet 2 includes a toilet body 4, a toilet seat 5 (opening / closing member), a toilet lid 6, a unit cover 7, and the like. Inside the unit cover 7, an opening / closing electric device 1 to be described later is incorporated for a toilet seat and a toilet lid, and the toilet seat 5 and the toilet lid 6 are connected to the toilet body 4 via the opening / closing electric device 1, respectively. Has been. Here, as the opening / closing electric device 1 connected to the toilet seat 5 and the opening / closing electric device 1 connected to the toilet lid 6, those having the same configuration can be used. A description will be given centering on the connected open / close electric device 1.

  As shown in FIG. 2, the opening / closing electric apparatus 1 has a rotation drive unit 8 that uses a motor 80 as a drive source on one side L <b> 1 and an output shaft 43 that is rotationally driven by the rotation drive unit 8. In the present embodiment, the motor 80 is a motor that can rotate in both directions, such as a DC motor with a brush, and is a type of motor whose rotational speed changes with a load.

  The opening / closing electric device 1 includes a braking mechanism 1a that generates a braking force against the rotation of the output shaft 43. In the present embodiment, the braking mechanism 1a includes a fluid damper device 10 and an urging member described later. 70 (assist spring) is used.

  The opening / closing electric device 1 has a drive unit case 99 that covers the rotation drive unit 8, and the fluid damper device 10 has a damper case 20 that covers the rotor shaft 40 that rotates together with the output shaft 43. . In the fluid damper device 10, the output shaft 43 protrudes from the damper case 20 to the other side L2, and the output shaft 43 is connected to the toilet seat 5 shown in FIG. The output shaft 43 has a flat surface 431 facing each other, and the flat surface 431 prevents the toilet seat 5 from being idle around the output shaft 43.

(Configuration of the rotation drive unit 8)
The rotation drive unit 8 includes a motor 80 and a gear train 90 that transmits the rotation of the motor 80 to the output shaft 43 (rotor shaft 40). The gear train 90 includes a first wheel 91 and a second wheel 92. A third wheel 93, a fourth wheel 94, and a fifth wheel 95 are provided. The first wheel & pinion 91 has a large-diameter gear 911 that meshes with the motor pinion 85 and a small-diameter gear 912. The second wheel & pinion 92 has a large-diameter gear 921 that meshes with the small-diameter gear 912 and a small-diameter gear 922. The third wheel & pinion 93 has a large-diameter gear 931 that meshes with the small-diameter gear 922 and a small-diameter gear 932. The fourth wheel & pinion 94 has a large-diameter gear 941 that meshes with the small-diameter gear 932 and a small-diameter gear 942. The fifth wheel & pinion 95 is attached to the end of the rotor shaft 40 on one side L1 and meshes with the small-diameter gear 942.

(Configuration of fluid damper device 10)
FIG. 3 is a cross-sectional view of the fluid damper device 10 used in the opening / closing electric device 1 according to Embodiment 1 of the present invention. FIGS. 3 (a) and 3 (b) each show the fluid damper device 10 along the axis L. FIG. 5 is a cross-sectional view taken along a plane orthogonal to the cross section, and a cross-sectional view of the fluid damper device 10 cut along a plane along an axis L. FIG. 4 is an explanatory view of the rotor shaft 40 of the fluid damper device 10 used in the opening / closing electric device 1 according to Embodiment 1 of the present invention. FIGS. 4 (a) and 4 (b) are each a valve body 50. FIG. 4 is a perspective view of a state where the valve body 50 is supported by the rotor shaft 40 and a perspective view of a state in which the valve body 50 is removed from the rotor shaft 40.

As shown in FIGS. 2 and 3, the fluid damper device 10 includes a rotor shaft 40 extending in the direction of the axis L, and a circle that rotatably supports the vicinity of the end portion on one side L1 of the rotor shaft 40 around the axis L. A plate-like first bearing member 61, a second bearing member 66 that supports the vicinity of the end of the other side L <b> 2 of the rotor shaft 40 so as to be rotatable around the axis L, and a damper case 20 disposed around the rotor shaft 40. And have.

  The damper case 20 has a first cylindrical portion 21 that surrounds the rotor shaft 40 and a second cylindrical portion 22 that surrounds the first cylindrical portion 21 on the outside in the radial direction. , Projecting from the first cylindrical portion 21 to the one side L1. The first cylindrical portion 21 and the second cylindrical portion 22 are connected via an annular first end plate portion 23 on the other side L2. Further, on the inner side of the first cylindrical portion 21, an annular second end plate portion 24 projecting radially inward from the first cylindrical portion 21 is provided in the vicinity of the end portion on the one side L <b> 1. The rotor shaft 40 is disposed so as to penetrate the central hole 240 of the plate portion 24. Inside the first cylindrical portion 21, a step portion 27 is formed at the end of the other side L <b> 2, and the cylindrical portion 661 of the second bearing member 66 is held using the step portion 27.

  As shown in FIGS. 2, 3, and 4, the rotor shaft 40 has a first shaft portion 41 having a round bar shape at a substantially central portion in the direction of the axis L. An end portion adjacent to the first shaft portion 41 on the one side L1 is a second shaft portion 42 in which a flat surface 421 is formed at a position facing each other. A fifth wheel & pinion 95 is fixed to the second shaft portion 42.

  In the rotor shaft 40, an end portion adjacent to the first shaft portion 41 on the other side L2 is an output shaft 43 in which a flat surface 431 is formed at a position facing each other. A large diameter portion 44 having a larger diameter than the first shaft portion 41 is formed between the first shaft portion 41 and the output shaft 43, and the large diameter portion 44 is a cylindrical portion 661 of the second bearing member 66. Located inside. A circumferential groove 441 is formed in the large diameter portion 44, and an O-ring 451 is attached to the circumferential groove 441.

  The first shaft portion 41 protrudes from the second end plate portion 24 to the one side L1. In the first shaft portion 41, a first bearing member 61 is disposed at a location adjacent to the first cylindrical portion 21 on one side L 1, and between the first bearing member 61 and the second end plate portion 24. The O-ring 452 is attached.

  In the fluid damper device 10, the damper chamber 11 is defined inside the first cylindrical portion 21 between the inner peripheral wall 210 of the first cylindrical portion 21 and the outer peripheral surface 410 of the first shaft portion 41 of the rotor shaft 40. The damper chamber 11 is filled with a fluid 12 such as oil.

  In the damper case 20, an urging member 70 (assist spring) made of a coil spring is disposed coaxially with the rotor shaft 40 between the first cylindrical portion 21 and the second cylindrical portion 22. One end (not shown) of the urging member 70 is held by the damper case 20, and the other end (not shown) is held by the rotor shaft 40. The urging member 70 exerts an urging force in a direction to erect the toilet seat 5 in a state where the toilet seat 5 is flattened. Therefore, the urging member 70 also functions as a braking mechanism 1 a that generates a braking force (drag) against the rotation of the output shaft 43 when the toilet seat 5 performs a closing operation to return from the standing posture to the flat posture.

(Configuration of damper chamber 11)
FIG. 5 is an explanatory view showing the internal configuration of the damper chamber 11 of the fluid damper device 10 used in the opening / closing electric device 1 according to Embodiment 1 of the present invention, and FIGS. The explanatory view showing the state in the damper chamber 11 when the rotor shaft 40 is driven in the second direction B (opening direction) in which the toilet seat 5 in the prone posture is in the standing posture, and the toilet seat 5 in the prone posture in the prone posture It is explanatory drawing which shows the mode in the damper chamber 11 at the time of driving the rotor axis | shaft 40 to the 1st direction A (closed direction).

As shown in FIGS. 3 and 5, the damper chamber 11 has a plate-like partition projection 26 protruding radially inward from the inner peripheral wall 210 of the first cylindrical portion 21 of the damper case 20. The front end portion 261 of the convex portion 26 is in contact with the outer peripheral surface 410 of the first shaft portion 41 of the rotor shaft 40. The partitioning convex portions 26 are provided at two locations that are separated by 180 ° around the axis L. The partition convex portion 26 extends in the damper chamber 11 over the entire axis L direction, and the damper chamber 11 is partitioned into two rooms by the partition convex portion 26. In this embodiment, the first cylindrical portion 21 has the same inner diameter over the entire circumference.

  As shown in FIGS. 3, 4, and 5, the outer peripheral surface 410 of the first shaft portion 41 of the rotor shaft 40 is for supporting a valve element protruding outward in the radial direction at two points spaced about 180 ° around the axis L. A convex portion 46 is formed, and the valve body 50 is supported by each of the two valve body supporting convex portions 46. Each of the two valve body supporting convex portions 46 extends from the large diameter portion 44 to a position close to the second end plate portion 24 in the axis L direction. In this embodiment, the valve body supporting convex portion 46 and the valve body 50 are configured in the same direction around the axis L, and the two valve body supporting convex portions 46 and the valve body 50 are centered on the axis L. Is rotationally symmetric.

  The radially outer portion of the valve body supporting convex portion 46 has a first convex portion 461 projecting radially outward and a diameter adjacent to the first convex portion 461 in the first direction A around the axis L. A second convex portion 462 that protrudes outward in the direction is formed, and a groove 460 is formed between the first convex portion 461 and the second convex portion 462. The groove 460 has an arc shape whose inner peripheral surface is curved over an angular range of about 180 ° or more, and the valve body 50 is supported by the groove 460. The first convex portion 461 is wider in the circumferential direction than the second convex portion 462, and the leading end side of the first convex portion 461 protrudes in the first direction A. In addition, the distal end portion of the first convex portion 461 is located radially outside the distal end portion of the second convex portion 462. Further, the valve body supporting convex portion 46 has a circumferential width that is narrower on the radially inner side than on the radially outer side.

  The valve body 50 includes a base 51 having a substantially circular cross section that extends in the axial direction parallel to the axis L, and a tip 52 that protrudes radially outward from the base 51 in the first direction A. The base 51 is supported so as to be rotatable about an axis parallel to the axis L in a groove 460 between the first convex 461 and the second convex 462, and the tip 52 is diameter-adjusted by the second convex 462. It inclines in the 1st direction A so that it may cover from the direction outer side. In addition, the radially outer portion of the tip portion 52 is located on the radially outer side from the first convex portion 461 and the second convex portion 462.

(Operation of fluid damper device 10)
In the opening / closing electric device 1 of the present embodiment, as will be described below with reference to FIG. 5, the fluid damper device 10 rotates the output shaft 43 when the toilet seat 5 performs the closing operation of returning from the standing posture to the flat posture. It is used as a braking mechanism 1a that generates a braking force (drag) against the vehicle.

  More specifically, in the fluid damper device 10 according to the present embodiment, when the toilet seat 5 in the flat posture is driven in a standing posture (opening direction), as shown in FIG. , It rotates around the axis L in a second direction B opposite to the first direction A. For this reason, the front-end | tip part 52 of the valve body 50 receives the fluid pressure from the fluid 12, inclines in the 1st direction A centering on the base 51, and the front-end | tip part 52 moves toward the 2nd convex part 462 side. As a result, a gap G is formed between the radially outer portion of the distal end portion 52 and the inner peripheral wall 210 of the first cylindrical portion 21 of the damper case 20. Here, the gap G when the rotor shaft 40 rotates in the second direction B around the axis L is considerably wide. Therefore, when the rotor shaft 40 rotates in the second direction B around the axis L, a load (drag) is hardly applied to the rotor shaft 40.

Next, as illustrated in FIG. 5B, when the toilet seat 5 in the standing posture is driven in a direction (closed direction) in which the toilet seat 5 is in a flat posture, the rotor shaft 40 rotates in the first direction A around the axis L. . For this reason, the front-end | tip part 52 of the valve body 50 receives the fluid pressure from the fluid 12, inclines in the 2nd direction B centering on the base 51, and the front-end | tip part 52 moves toward the 1st convex part 461 side. As a result, the distal end portion 52 moves radially outward, and therefore the gap G between the radially outer portion of the distal end portion 52 and the inner peripheral wall 210 of the first cylindrical portion 21 of the damper case 20 It becomes narrower than the gap G when it rotates in the second direction B around L. In this embodiment, when the rotor shaft 40 rotates around the axis L in the first direction A, the radially outer portion of the tip 52 is the inner peripheral wall 210 of the first cylindrical portion 21 of the damper case 20 over the entire angular range. And the gap G becomes zero. Therefore, the fluid 12 is prevented from moving in the second direction B between the valve body 50 and the inner peripheral wall 210, so that a large load (drag) is applied to the rotor shaft 40. Even in such a case, a slight gap is left between the valve body 50 and the second end plate portion 24 on the one side L1 from the valve body 50. Therefore, the movement of the fluid in the second direction B is allowed slightly. Therefore, the rotor shaft 40 is allowed to rotate in the first direction A at a low speed although a large load is applied.

(Main effects of this form)
As described above, in the opening / closing electric apparatus 1 of this embodiment, when the rotational driving force of the motor 80 is transmitted to the output shaft 43 via the gear train 90, the output shaft 43 rotates around the axis L, and the output shaft 43 It is possible to drive the toilet seat 5 (opening / closing member) connected to the opening and closing directions.

  Here, the opening / closing electric device 1 is provided with a braking mechanism 1a including an urging member 70 and a fluid damper device 10, and the braking mechanism 1a rotates the output shaft 43 in the closing direction (first direction A). In this case, a braking force that resists the rotation of the output shaft 43 is generated. For this reason, even when a force that rotates the toilet seat 5 is applied during the driving in the closing direction due to the influence of gravity or the like applied to the toilet seat 5, a rapid increase in the rotational speed of the toilet seat 5 can be suppressed. The toilet seat 5 and the output shaft 43 can be smoothly rotated. Therefore, the angular position of the toilet seat 5 and the output shaft 43 is monitored by a potentiometer or the like, and control such as switching the current (voltage) supplied to the motor 80 based on the monitoring result is not required. Therefore, the circuit configuration can be simplified. In addition, since it is not necessary to generate a braking force using a short brake in the motor 80 made of a brushed motor, the brush of the motor 80 is less likely to be worn or damaged.

  Further, from the middle of driving in the closing direction, a force that rotates the toilet seat 5 in the closing direction is applied due to the influence of gravity or the like applied to the toilet seat 5, so that power is supplied to the motor 80 until halfway in the closing direction. Can rotate the toilet seat 5 in its closing direction by its own weight. Even in such a case, since the opening / closing electric device 1 is provided with the braking mechanism 1a including the biasing member 70 and the fluid damper device 10, the toilet seat 5 can be prevented from falling down suddenly.

  Further, in this embodiment, as the braking mechanism 1a, an urging member 70 made of a coil spring disposed coaxially with the rotor shaft 40 (output shaft 43), and disposed coaxially with the rotor shaft 40 (output shaft 43). A fluid damper device 10 is used. For this reason, even when the two braking mechanisms 1a (the urging member 70 and the fluid damper device 10) are provided in the opening / closing electric device 1, the size of the opening / closing electric device 1 can be reduced.

  Further, since the urging member 70 urges the toilet seat 5 in the flat state in the opening direction, the toilet seat 5 can be driven in the opening direction with a small force when the toilet seat 5 is rotated in the opening direction. Therefore, a small motor 80 can be used.

[Variation 1 of Embodiment 1]
FIG. 6 is an explanatory diagram of Modification 1 of the fluid damper device 10 used in the opening / closing electric device 1 according to Embodiment 1 of the present invention, and illustrates the inner peripheral wall 210 of the first cylindrical portion 21 of the fluid damper device 10. The change in the circumferential direction of the inner diameter is exaggerated. FIG. 7 shows the valve body 50 and the inner peripheral wall when the rotor shaft 40 rotates in the second direction B in Modification 1 of the fluid damper device 10 used in the opening / closing electric device 1 according to Embodiment 1 of the present invention. FIG. 7A and FIG. 7B are explanatory views when the toilet seat 5 in the prone posture is started to rotate toward the standing posture, and the reaching to the standing posture is completed. It is explanatory drawing at the time. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  The fluid damper device 10 described with reference to FIG. 5 and the like is a braking mechanism 1a that generates a braking force (drag) against the rotation of the output shaft 43 when the toilet seat 5 performs a closing operation that returns from a standing posture to a flat posture. When the toilet seat 5 performs an opening operation for shifting from a flat posture to a standing posture, a braking force (drag) against the rotation of the output shaft 43 is not generated. On the other hand, in this embodiment, when the toilet seat 5 performs the closing operation for returning from the standing posture to the flat posture, the toilet shaft 5 performs the opening operation for shifting from the flat posture to the standing posture. Generate braking force (drag) against rotation.

More specifically, as shown in FIG. 6, in the fluid damper device 10 of the present embodiment, the inner diameter of the inner peripheral wall 210 of the first cylindrical portion 21 is different in the circumferential direction. In the present embodiment, the inner diameter of the inner peripheral wall 210 monotonously decreases in the second direction B in the range of movement angles of the valve body 50 when the rotor shaft 40 rotates. Further, the inner diameter of the inner peripheral wall 210 is switched in two steps in the circumferential direction in the range of the movement angle of the valve body 50 when the rotor shaft 40 rotates. In this embodiment, when the angle position where the valve body 50 is located when the toilet seat 5 is in the flat posture is 0 °, and the angle position where the valve body 50 is located when the toilet seat 5 is in the standing posture is 90 °, The movable range of the toilet seat 5 (movement angle range of the valve body 50) is set to about 110 °. Here, the inner peripheral wall 210 has a radius r1 in an angle range θ1 of about 70 ° to about 110 °, and a radius r2 in an angle range θ2 of 0 ° to about 45 °, and the radii r1 and r2 have the following relationship: r1 <r2
It has become. Further, the inner peripheral wall 210 continuously changes from the radius r2 to the radius r1 in an angle range of about 45 ° to about 70 °.

  Accordingly, the gap G between the valve body 50 and the inner peripheral wall 210 when the rotor shaft 40 starts to rotate in the second direction B and starts to rotate the toilet seat 5 in the flat posture toward the standing posture (FIG. 7A). Therefore, the gap G (see FIG. 7B) between the valve body 50 and the inner peripheral wall 210 when the toilet seat 5 has reached the standing posture is narrowed. Therefore, even when the motor 80 is driven at a constant current, an increase in the rotational speed of the toilet seat 5 can be mitigated when the toilet seat 5 is shifted to the standing posture.

  That is, when the toilet seat 5 is in the flat posture, the rotational force due to gravity is the largest, and as the toilet seat 5 shifts to the standing posture, the rotational force due to the gravity of the toilet seat 5 becomes smaller. When driven, when the load from the fluid damper device 10 is not taken into consideration, the rotational speed of the toilet seat 5 (rotor shaft 40) increases from 0 ° to 90 °. However, in the present embodiment, in the fluid damper device 10, the inner diameter of the inner peripheral wall 210 is reduced in the middle of the transition from 0 ° to 90 °. The damper device 10 generates a braking force (drag) against the rotation of the output shaft 43. Therefore, even when the motor 80 is driven at a constant current, when the load from the fluid damper device 10 is taken into consideration, the rotational speed of the toilet seat 5 (rotor shaft 40) is changed from 0 ° to 90 °. The change in the rotational speed of 5 (the rotational speed of the rotor shaft 40) can be alleviated. Therefore, when the rotor shaft 40 is driven in the second direction B, the rotor shaft 40 can be detected without adopting a complicated circuit configuration in which the angular position of the rotor shaft 40 is detected and the magnitude of the drive current for the motor 80 is switched. The change in the rotational speed of 40 can be mitigated. Therefore, it is possible to avoid a situation in which the toilet seat 5 rotates rapidly as it approaches the standing posture. On the other hand, when the toilet seat 5 changes from the standing posture to the flat posture, the radially outer portion of the distal end portion 52 of the valve body 50 comes into contact with the inner peripheral wall 210 of the first cylindrical portion 21 of the damper case 20 and the gap G Therefore, the load applied from the fluid 12 to the rotor shaft 40 is constant.

In the configuration example shown in FIG. 6, the inner diameter of the inner peripheral wall 210 of the first cylindrical portion 21 is switched in two stages. However, the inner diameter of the inner peripheral wall 210 of the first cylindrical section 21 is switched in two or more stages. You may employ | adopt the structure which is. A configuration in which the inner diameter of the inner peripheral wall 210 of the first cylindrical portion 21 is continuously switched may be employed.

[Modification 2 of Embodiment 1]
FIG. 8 is an explanatory view of a second modification of the fluid damper device 10 used in the opening / closing electric device 1 according to the first embodiment of the present invention, and is a sectional view of the damper chamber 11. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 8, in this embodiment as well, in the same manner as in the first embodiment, the damper chamber 11 has a plate-shaped partitioning convex from the inner peripheral wall 210 of the first cylindrical portion 21 of the damper case 20 toward the inside in the radial direction. The portion 26 protrudes, and the tip end portion 261 of the partitioning convex portion 26 is in contact with the outer peripheral surface 410 of the first shaft portion 41 of the rotor shaft 40. The partitioning convex portions 26 are provided at two locations that are separated by 180 ° around the axis L. The partitioning convex portion 26 extends in the damper chamber 11 over the entire axis L direction, and the damper chamber 11 is partitioned into two rooms by the cutting convex portion 26. In this embodiment, the first cylindrical portion 21 has the same inner diameter over the entire circumference. On the outer peripheral surface 410 of the first shaft portion 41 of the rotor shaft 40, valve body supporting convex portions 46 are formed at two positions spaced apart by 180 ° around the axis L, and the two valve body supporting convex portions 46 are formed. A valve body 50 is supported on each of the two.

  Here, the two valve body supporting convex portions 46 and the valve body 50 are configured in opposite directions around the axis L. For this reason, of the two valve bodies 50, one valve body 50a (first valve body) of the output shaft 43 is rotated when the rotor shaft 40 rotates in the first direction A (closed direction) around the axis L. A braking force (drag) that resists rotation is generated, and the other valve body 50 b (second valve body) hardly generates a braking force (drag) that resists rotation of the output shaft 43. Of the two valve bodies 50, the other valve body 50b (second valve body) rotates the output shaft 43 when the rotor shaft 40 rotates in the second direction B (opening direction) around the axis L. The one valve body 50a (first valve body) hardly generates a braking force (drag) against the rotation of the output shaft 43.

  Even in such a configuration, a rapid increase in the rotational speed of the toilet seat 5 can be suppressed even when the force that rotates the toilet seat 5 changes due to the influence of gravity or the like applied to the toilet seat 5.

[Embodiment 2]
(overall structure)
FIG. 9 is a perspective view of the inside of the opening / closing electric device 1 according to Embodiment 2 of the present invention. FIGS. 9A and 9B show the inside of the opening / closing electric device 1 in the direction of the axis L. They are the perspective view seen from the other side L2, and the disassembled perspective view which looked at the inside of the electric device 1 for opening and closing from the other side L2 of the axis line L direction. FIG. 10 is an explanatory view of the centrifugal brake 74 (braking mechanism 1a) used in the opening / closing electric device 1 according to Embodiment 2 of the present invention. FIGS. 10 (a) and 10 (b) are respectively centrifugal brakes 74. FIG. 2 is an exploded perspective view of FIG. FIG. 11 is an explanatory diagram of the torque limiter 98 used in the opening / closing electric device 1 according to Embodiment 2 of the present invention. In addition, in FIG. 9, illustration of the drive part case 99, the motor 80, etc. is abbreviate | omitted. Since the basic configuration of this embodiment is the same as that of Embodiment 1, common portions are denoted by the same reference numerals and description thereof is omitted.

As shown in FIG. 9, the opening / closing electric apparatus 1 is rotationally driven by the rotational drive unit 8 having a motor (not shown) as a drive source on one side L <b> 1 and the rotational drive unit 8, as in the first embodiment. Output shaft 43. In this embodiment, the motor is a DC motor with a brush. Also in the present embodiment, as in the first embodiment, in the rotational drive unit 8, the gear train 90 meshes with the first car 91 that meshes with the motor pinion 85, the second car 92 that meshes with the first car 91, and the second car 92. It has a fourth wheel 94 that meshes with the third wheel 93 and the third wheel 93 and a fifth wheel 95 that meshes with the fourth wheel 94.

  Further, the opening / closing electric device 1 includes a braking mechanism 1a that generates a braking force against the rotation of the output shaft 43. In this embodiment, the braking mechanism 1a includes a fluid damper device 10 and an urging force described later. A member 70 (assist spring) is used. Further, the braking mechanism 1 a includes a centrifugal brake 74 described with reference to FIG. 10 at a position overlapping the first wheel & pinion 91.

  As shown in FIG. 10, the centrifugal brake 74 has a disc-like brake member 75 that is disposed so as to overlap the first wheel 91, and the first wheel 91 and the brake member 75 are axially connected by a support shaft 910. It is rotatably supported around L22.

  In this embodiment, the brake member 75 extends from the connecting portion 751 in which the shaft portion 759 in which the shaft portion (not shown) of the first wheel & pinion 91 is fitted and one end of the connecting portion 751 to the opposite sides. It has two existing arm portions 752 and 753. Further, constricted portions 754 and 755 are formed at the connecting portion between the connecting portion 751 and the arm portion 752 and the connecting portion between the connecting portion 751 and the arm portion 753, and the arm portions 752 and 753 are connected to the constricted portion 754, 755 can bend in the radial direction.

  Further, the brake member 75 is disposed inside a cylindrical portion 991 (fixed body) formed in the drive unit case 99 shown in FIG. 2, and the brake member 75 and the cylindrical portion 991 of the drive unit case 99 perform centrifugal separation. A brake 74 is configured.

  In the centrifugal brake 74 configured as described above, when the motor is rotated, the brake member 75 rotates integrally with the first wheel & pinion 91, and the arm portions 752 and 753 are bent radially outward by the centrifugal force at that time. It contacts the inner peripheral surface of the cylindrical portion 991 of the drive unit case 99. As a result, a braking force is applied to the brake member 75 by a frictional force generated between the brake member 75 and the cylindrical portion 991. As a result, the first wheel 91 is applied with a braking force (drag) against the rotation of the output shaft 43 when the output shaft 43 rotates in either direction around the axis L.

  In addition, as shown in FIG. 11, in this embodiment, a torque limiter 98 is configured using a third wheel & pinion 93. Specifically, the third wheel & pinion 93 includes a cylindrical first member 936 in which a large-diameter gear 931 is formed, and a cylindrical second member 937 in which an end in the direction of the axis L23 is fitted inside the first member 936. And a cylindrical third member 938 whose end in the direction of the axis L23 fits inside the second member 937, and a small-diameter gear 932 is formed on the outer peripheral surface of the third member 938. The third member 938 is formed with a shaft hole 938a into which the support shaft 930 is fitted, and the second member 937 is formed with an engagement hole 937a into which the end of the third member 938 in the direction of the axis L23 is fitted. .

  At the end of the second member 937 in the direction of the axis L23, three arm portions 934 extending in the circumferential direction on the outer side in the radial direction are formed, and the distal end portion of the arm portion 934 projects outward in the radial direction. A convex portion 934a is formed. On the other hand, on the inner peripheral surface of the first member 936, concave portions 933a into which the convex portions 934a of the arm portions 934 of the second member 937 are fitted are formed at a plurality of locations in the circumferential direction. . Therefore, when an excessive load is applied to the output shaft 43 side when the motor is rotated, the convex portion 934a moves over the convex portion 933b formed between the concave portions 933a and moves to the adjacent concave portion 933a. . For this reason, since the idle rotation occurs between the first member 936 and the second member 937, it is possible to prevent the gear train 90 from being damaged even when an excessive load is applied to the output shaft 43 side. it can.

(Configuration of fluid damper device 10)
FIG. 12 shows a fluid damper device 10 used in the opening / closing electric device 1 according to Embodiment 2 of the present invention.
12 (a) and 12 (b) are respectively an exploded perspective view of the fluid damper device 10 with the damper case 25 and the like removed, and a state in which the bearing member and the like are removed from the rotor shaft 40. It is a disassembled perspective view. FIG. 13 is a cross-sectional view of the fluid damper device 10 used in the opening / closing electric device 1 according to Embodiment 2 of the present invention, taken along a plane orthogonal to the axis L, and FIGS. FIG. 4 is a cross-sectional view showing the position of the valve body 50 in a state where a load is generated, and a cross-sectional view showing the position of the valve body 50 in a state where a load is hardly generated. FIG. 14 is an explanatory diagram of the valve body 50 of the fluid damper device 10 used in the opening / closing electric apparatus 1 according to Embodiment 2 of the present invention. FIGS. 14 (a) and 14 (b) show the valve body 50. FIG. 6 is a perspective view of a state where the rotor shaft is supported by the rotor shaft and a perspective view of a state where the valve body is removed from the rotor shaft.

  As shown in FIG. 12, the fluid damper device 10 includes a rotor shaft 40 extending in the direction of the axis L, and a disc-like shape that supports the vicinity of the end portion of one side L1 of the rotor shaft 40 so as to be rotatable around the axis L. A first bearing member 61, a second bearing member 66 that supports the vicinity of the end portion of the other side L2 of the rotor shaft 40 so as to be rotatable around the axis L, and a cylindrical damper case 25 disposed around the rotor shaft 40 And have. Further, a fixing member 62 that fixes the first bearing member 61 to the damper case 25 is disposed on one side L1 of the rotor shaft 40 with respect to the first bearing member 61, and the rotor shaft 40 with respect to the second bearing member 66. A fixing member 67 for fixing the second bearing member 66 to the damper case 25 is disposed on the other side L2. The rotor shaft 40 has a round bar-shaped shaft portion 47 at a substantially central portion in the direction of the axis L, and one end L1 of the shaft portion 47 is connected to the fifth wheel & pinion 95.

  In the rotor shaft 40, an end portion adjacent to the shaft portion 47 on the other side L2 is an output shaft 43 in which a flat surface 431 is formed at a position facing each other. A flange portion 49 having a diameter larger than that of the shaft portion 47 is formed between the shaft portion 47 and the output shaft 43, and annular seal members 68 and 69 are disposed on the other side L2 with respect to the flange portion 49. Has been.

  On the radially outer side of the damper case 25, an urging member 70 (assist spring) made of a coil spring is disposed coaxially with the rotor shaft 40. One end 701 of the urging member 70 is held by a case (not shown) disposed around the urging member 70, and the other end 702 is a hole 955 of the fifth wheel & pinion 95 shown in FIG. Is held in. The urging member 70 exerts an urging force in a direction to erect the toilet seat 5 in a state where the toilet seat 5 is flattened. For this reason, the urging member 70 functions as a braking mechanism 1 a that generates a braking force (drag) against the rotation of the output shaft 43 when the toilet seat 5 performs a closing operation to return from the standing posture to the flat posture.

  As shown in FIG. 13, a damper chamber 11 is defined inside the damper case 25 between the outer peripheral surface 470 of the shaft portion 47 of the rotor shaft 40, and the damper chamber 11 is filled with a fluid 12 such as oil. Has been. In the damper chamber 11, a plate-like partitioning projection 26 protrudes radially inward from the inner peripheral wall 250 of the damper case 25, and the tip 261 of the partitioning projection 26 is a shaft portion of the rotor shaft 40. 47 is in contact with the outer peripheral surface 470. The partitioning convex portions 26 are provided at two locations that are separated by 180 ° around the axis L. The partition convex portion 26 extends in the damper chamber 11 over the entire axis L direction, and the damper chamber 11 is partitioned into two rooms by the partition convex portion 26. In this embodiment, the damper case 25 has the same inner diameter over the entire circumference.

  As shown in FIGS. 12, 13, and 14, the valve body supporting convex portions 46 are formed on the outer peripheral surface 470 of the shaft portion 47 of the rotor shaft 40 at two locations that are separated by 180 ° around the axis L. The valve body 50 is supported by each of the two valve body support convex portions 46. Each of the two valve body supporting convex portions 46 extends to the end portion on one side L1 of the rotor shaft 40 in the axis L direction. Convex portions 467 and 468 are formed at two locations spaced apart in the axis L direction on the radially outer portion of the valve body supporting convex portion 46, and a concave portion 469 is formed between the convex portions 467 and 468.

  The valve body 50 includes a support plate portion 56 extending in the direction of the axis L, and a seal plate portion 57 protruding radially inward from an edge on one side around the axis L of the support plate portion 56. The seal plate portion 57 is shorter than the support plate portion 56 in the axis L direction, but has a size that can close the recess 469 from the circumferential direction. Support holes 561 and 562 are formed in the support plate portion 56 at two locations spaced apart in the axis L direction. The valve body 50 is supported by the valve body support convex portion 46 in a state in which the convex portion 467 fits in the support hole 561 and the convex portion 468 fits in the support hole 562 so that the valve body 50 can move a predetermined distance in the circumferential direction. The In the present embodiment, the valve body supporting convex portion 46 and the valve body 50 are configured in opposite directions around the axis L.

(Operation of fluid damper device 10)
In the opening / closing electric device 1 of the present embodiment, as will be described below with reference to FIG. 13, the fluid damper device 10 performs the closing operation when the toilet seat 5 returns from the standing posture to the flat posture, and the toilet seat 5 is flattened. It is used as a braking mechanism 1a that generates a braking force (drag) against the rotation of the output shaft 43 in any of the opening operations that shift from the posture to the standing posture.

  More specifically, in the fluid damper device 10 according to the present embodiment, when the toilet seat 5 in the standing posture is driven in a direction (closed direction) in which the toilet seat 5 is in a prone posture, as shown in FIG. , Rotate around the axis L in the first direction A. For this reason, of the two valve bodies 50, one valve body 50a (first valve body) moves in a direction in which the seal plate portion 57 comes into close contact with the valve body supporting convex portion 46, and closes the concave portion 469. For this reason, when the rotor shaft 40 rotates in the first direction A (closed direction) around the axis L, a braking force (drag) against the rotation of the output shaft 43 is generated. On the other hand, the other valve body 50b (second valve body) moves in a direction in which the seal plate portion 57 is separated from the valve body supporting convex portion 46, and opens the concave portion 469. For this reason, when the rotor shaft 40 rotates in the first direction A (closed direction) around the axis L, almost no braking force (drag) against the rotation of the output shaft 43 is generated.

  On the other hand, when the toilet seat 5 in the flat posture is driven in a direction (opening direction) in which the toilet seat 5 is in the standing posture, the rotor shaft 40 is moved in the second direction B around the axis L as shown in FIG. Rotate. For this reason, of the two valve bodies 50, the other valve body 50b (second valve body) moves in a direction in which the seal plate portion 57 comes into close contact with the valve body supporting convex portion 46 and closes the concave portion 469. For this reason, when the rotor shaft 40 rotates in the second direction B (opening direction) around the axis L, a braking force (drag) against the rotation of the output shaft 43 is generated. On the other hand, one valve body 50a (first valve body) moves in a direction in which the seal plate portion 57 is separated from the valve body supporting convex portion 46, thereby opening the concave portion 469. For this reason, when the rotor shaft 40 rotates in the second direction B (opening direction) around the axis L, almost no braking force (drag) against the rotation of the output shaft 43 is generated.

(Main effects of this form)
As described above, in the opening / closing electric apparatus 1 of this embodiment, when the rotational driving force of the motor 80 is transmitted to the output shaft 43 via the gear train 90, the output shaft 43 rotates around the axis L, and the output shaft 43 It is possible to drive the toilet seat 5 (opening / closing member) connected to the opening and closing directions.

  Here, the opening / closing electric device 1 is provided with a braking mechanism 1a including an urging member 70, a centrifugal brake 74, and a fluid damper device 10, and the urging member 70 has an output shaft 43 in a closing direction (first direction). When rotating in one direction A), a braking force against the rotation of the output shaft 43 is generated. In addition, the centrifugal brake 74 and the fluid damper device 10 rotate the output shaft 43 when the output shaft 43 rotates in the closing direction (first direction A) and in the opening direction (second direction B). Generate a braking force to resist. For this reason, even when a force that rotates the toilet seat 5 is applied in the middle of driving in the closing direction due to the influence of gravity or the like applied to the toilet seat 5, or when a force necessary to rotationally drive the toilet seat 5 is reduced. A rapid increase in the rotational speed of the toilet seat 5 can be suppressed.

The centrifugal brake 74 exerts a large braking force when rotated at a high speed due to the rotational force applied from the toilet seat 5 side. For this reason, it is suitable for rotating the toilet seat 5 smoothly.

[Modification of Embodiment 2]
FIG. 15 is an explanatory view of a modification of the fluid damper device 10 used in the opening / closing electric device 1 according to Embodiment 2 of the present invention, and is a cross-sectional view of the damper chamber 11. Since the basic configuration of this embodiment is the same as that of Embodiments 1 and 2, common portions are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 15, in this embodiment as well, in the same manner as in the second embodiment, a plate-like partition convex portion 26 protrudes radially inward from the inner peripheral wall 250 of the damper case 25 in the damper chamber 11. The leading end portion 261 of the partitioning convex portion 26 is in contact with the outer peripheral surface 470 of the shaft portion 47 of the rotor shaft 40. The partitioning convex portions 26 are provided at two locations that are separated by 180 ° around the axis L. The partition convex portion 26 extends in the damper chamber 11 over the entire axis L direction, and the damper chamber 11 is partitioned into two rooms by the partition convex portion 26. In this embodiment, the first cylindrical portion 21 has the same inner diameter over the entire circumference. On the outer peripheral surface 410 of the first shaft portion 41 of the rotor shaft 40, valve body supporting convex portions 46 are formed at two positions spaced apart by 180 ° around the axis L, and the two valve body supporting convex portions 46 are formed. A valve body 50 is supported on each of the two.

  Here, the valve body supporting convex portion 46 and the valve body 50 are configured in the same direction around the axis L, and the two valve body supporting convex portions 46 and the valve body 50 are centered on the axis L. It is rotationally symmetric. For this reason, the two valve bodies 50 generate a braking force (drag) that resists the rotation of the output shaft 43 when the rotor shaft 40 rotates in the first direction A (closed direction) around the axis L. When the shaft 40 rotates in the second direction B (opening direction) around the axis L, almost no braking force (drag) against the rotation of the output shaft 43 is generated.

  Even in such a configuration, even when a force that rotates the toilet seat 5 is applied during the driving in the closing direction due to the influence of gravity or the like applied to the toilet seat 5, a rapid increase in the rotational speed of the toilet seat 5 is suppressed. Can do.

[Embodiment 3]
FIG. 16 is an explanatory diagram of a braking mechanism 1a used in the opening / closing electric apparatus 1 according to Embodiment 3 of the present invention. Since the basic configuration of this embodiment is the same as that of Embodiments 1 and 2, common portions are denoted by the same reference numerals and description thereof is omitted.

  In the second embodiment, the braking mechanism 1a including the centrifugal brake 74 is provided in the number 1 wheel 91. However, in this embodiment, as shown in FIG. An aerodynamic brake 76 that generates a braking force is used as the braking mechanism 1a. More specifically, a plurality of blades 762 are formed around a cylindrical portion 761 protruding in the direction of the axis L22 from the first wheel 91, and due to air resistance received when rotating integrally with the first wheel 91 Generate braking force. Even in such a configuration, the aerodynamic brake 76 has a braking force that resists rotation of the output shaft 43 when the output shaft 43 rotates in the closing direction (first direction A) and in the opening direction (second direction B). Is generated. For this reason, even when a force that rotates the toilet seat 5 is applied in the middle of driving in the closing direction due to the influence of gravity or the like applied to the toilet seat 5, or when a force necessary to rotationally drive the toilet seat 5 is reduced. A rapid increase in the rotational speed of the toilet seat 5 can be suppressed. In FIG. 16, in the first wheel & pinion 91, the blade 762 is provided on the opposite side to the small diameter gear 912 from the large diameter gear 911 (the other side L2 in the direction of the axis L shown in FIG. 2). A blade 762 may be provided on the opposite side of the diameter gear 991 from the small diameter gear 912 (one side L1 in the direction of the axis L shown in FIG. 2).

  Further, the aerodynamic brake 76 exerts a large braking force when rotated at a high speed due to the rotational force from the toilet seat 5 side. For this reason, it is suitable for rotating the toilet seat 5 smoothly.

[Other embodiments]
In the above embodiment, an example in which a plurality of types of braking mechanisms 1a are mounted has been described. However, a configuration in which only one type of braking mechanism 1a is mounted may be employed. For example, a configuration in which only the fluid damper device 10, only the centrifugal brake 74, or only the aerodynamic brake 76 is mounted may be employed. In the above embodiment, the motor 80 is driven at a constant current regardless of the angular position of the output shaft 43 during the period in which the output shaft 43 is being driven. In the middle, a constant voltage driven configuration may be adopted regardless of the angular position of the output shaft 43.

1 .. Electric device for opening and closing, 1a .. Braking mechanism, 2 .. Western style toilet (opening and closing device), 5 .. Toilet seat (opening and closing member), 8 .. Rotation drive unit, 10. 11 ·· Damper chamber, 12 · · Fluid, 20, 25 · · Damper case, 26 · · Partition convex portion, · · · Rotor shaft, 43 · · Output shaft, 46 · · Valve body supporting convex portion, 50 .... Valve, 70 ... Biasing member (braking mechanism), 74 ... Centrifuge brake (braking mechanism), 75 ... Brake member, 76 ... Aerodynamic brake (braking mechanism), 80 ... Motor, 85 ...・ Motor pinion, 90 ・ ・ Gear train, 91 ・ ・ No. 1 car, 98 ・ ・ Torque limiter, 99 ・ ・ Driver case (fixed body), 100 ・ ・ Western-style toilet unit, 210, 250 ・ ・ Inner wall, 752 , 753 ·· Arm, 762 · · Feather, L · · Axis

Claims (12)

An output shaft;
A motor,
A gear train that transmits the rotational driving force of the motor to the output shaft to rotate the output shaft in an opening direction and a closing direction around an axis;
A braking mechanism that generates a braking force that resists rotation of the output shaft when the output shaft rotates to at least one side around the axis;
An electric device for opening and closing characterized by comprising:   The opening / closing electric device according to claim 1, wherein the braking mechanism generates the braking force when the output shaft rotates to one side and the other side around the axis.   The opening / closing electric device according to claim 1, wherein at least a fluid damper device is used for the braking mechanism.   The fluid damper device includes a cylindrical damper case in which a partitioning convex portion projects radially inward from an inner peripheral wall, a rotor shaft that is inserted inside the damper case and rotates integrally with the output shaft, and the damper 4. A fluid filled in a case, and a valve body supported by the rotor shaft and moved by pressure received from the fluid as the rotor shaft rotates. The electric device for opening and closing as described.   The centrifugal brake that generates the braking force when rotating at least integrally with a gear included in the gear train is used for the braking mechanism. The electric device for opening and closing as described in 2.   6. The opening and closing according to claim 5, wherein the centrifugal brake includes a brake member having an arm portion that is displaced radially outward and slides on a fixed body when the centrifugal brake rotates together with the gear. Electric device.   The aerodynamic brake that generates the braking force by at least air resistance that is received when the braking mechanism rotates together with a gear included in the gear train is used for the braking mechanism. The electric device for opening and closing as described in any one of Claims.   The opening / closing electric apparatus according to any one of claims 3 to 7, wherein the braking mechanism includes at least a biasing member that applies the braking force to the output shaft.   The opening / closing electric apparatus according to claim 8, wherein the biasing member is a torsion coil spring.   The constant current drive or the constant voltage drive is performed in the motor regardless of the angular position of the output shaft during a period of driving the output shaft. The electric device for opening and closing as described in 2. An opening / closing device comprising the opening / closing electric device according to any one of claims 1 to 10,
An opening / closing device connected to the output shaft is connected to an opening / closing member that switches between a prone posture and a standing posture as the output shaft rotates.   The opening / closing device according to claim 11, wherein the opening / closing member is a toilet seat of a Western-style toilet.

Images