CN112790655A - Opening/closing member drive device and toilet lid opening/closing unit - Google Patents
Opening/closing member drive device and toilet lid opening/closing unit Download PDFInfo
- Publication number
- CN112790655A CN112790655A CN202011271124.5A CN202011271124A CN112790655A CN 112790655 A CN112790655 A CN 112790655A CN 202011271124 A CN202011271124 A CN 202011271124A CN 112790655 A CN112790655 A CN 112790655A
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- Prior art keywords
- output shaft
- opening
- housing
- gear
- spring
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 55
- 238000003780 insertion Methods 0.000 claims abstract description 38
- 230000037431 insertion Effects 0.000 claims abstract description 38
- 230000003014 reinforcing effect Effects 0.000 claims description 53
- 230000005540 biological transmission Effects 0.000 claims description 30
- 239000011347 resin Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 10
- 238000005381 potential energy Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K13/00—Seats or covers for all kinds of closets
- A47K13/10—Devices for raising and lowering, e.g. tilting or lifting mechanisms; Collapsible or rotating seats or covers
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K13/00—Seats or covers for all kinds of closets
- A47K13/24—Parts or details not covered in, or of interest apart from, groups A47K13/02 - A47K13/22, e.g. devices imparting a swinging or vibrating motion to the seats
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Toilet Supplies (AREA)
- Gear Transmission (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
An opening/closing member driving device and a toilet lid opening/closing unit, in which a projection of an output shaft connecting an opening/closing member and a portion to which a driving force from a motor is transmitted are not separated by an auxiliary spring. The output shaft (7) of the opening-closing member driving device includes a protruding portion connected to the opening-closing member and a base portion located in the housing. The housing includes a barrel portion (24) that supports an end portion of the base in the-Z direction. The first assist spring (63) includes: a first spring main body portion surrounding the cylinder portion; a first housing-side locking portion extending from the first spring main body portion to a radially inner peripheral side and passing through the cutout groove of the cylinder portion; and a first protrusion protruding from the first spring main body portion. The base (12) comprises: an insertion part (39) inserted into the cylindrical part; an annular portion (43) that contacts the cylindrical portion from the outer peripheral side; a first spring locking hole (42) for locking the first protrusion; and a gear fixing part (40) to which an output gear (53) is fixed in the-Z direction of the insertion part.
Description
Technical Field
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 and closes a toilet lid of a toilet unit serving as the opening/closing member.
Background
An opening/closing member driving device for opening/closing an opening/closing member such as a toilet lid is disclosed in patent document 1. The opening and closing member drive mechanism of patent document 1 includes: an electric motor; an output shaft; a transmission mechanism for transmitting a driving force of the motor to the output shaft; and a housing that houses the motor and the transmission mechanism. The output shaft includes a protruding portion protruding outward from an opening provided in the housing and a base portion located inside the housing. The projection is connected to an opening/closing member. A gear portion for receiving a driving force from the transmission mechanism is provided at an end portion of the base portion on the opposite side to the protruding portion.
The opening/closing member drive mechanism of the above-mentioned document incorporates an assist spring that assists opening/closing of the opening/closing member by biasing the output shaft. The assist spring is a coil spring and is disposed so as to surround the base portion from the outer peripheral side. The assist spring is located between the gear portion and the protruding portion in the axial direction of the output shaft.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2014-200458
According to the structure in which the assist spring is located between the gear portion and the protruding portion, the protruding portion to which the opening/closing member is connected and the gear portion to which the driving force from the motor is transmitted are separated in the axial direction by the distance by which the assist spring is arranged.
Here, the protruding portion of the output shaft is connected to an end portion of the opening/closing member, and opens/closes the opening/closing member in a cantilever state. Therefore, a load is applied to the output shaft from the opening/closing member side. Further, a load from the transmission mechanism is applied to the gear portion. Therefore, when the protruding portion and the gear portion are separated in the axial direction, stress is likely to be generated in the output shaft when the opening/closing member is opened and closed, and the output shaft may be deformed.
Disclosure of Invention
In view of the above-described aspects, a technical problem of the present invention is to provide an opening and closing member driving device and a toilet lid opening and closing unit in which there is no case where a projection of an output shaft to which an opening and closing member is connected and a portion to which a driving force from a motor is transmitted are separated in an axial direction due to an arrangement of an auxiliary spring.
In order to solve the above-described technical problem, an opening/closing member driving device of the present invention includes: an electric motor; an output shaft connected to the opening/closing member; a transmission mechanism that transmits a driving force of the electric motor to the output shaft; a housing that houses the motor and the transmission mechanism; and a first assist spring that accumulates elastic potential energy that rotates the output shaft in a second rotational direction opposite to the first rotational direction when the output shaft rotates in a first rotational direction, wherein when a direction along an axis of the output shaft is an axis direction, one side of the axis direction is a first direction, and the other side is a second direction, the output shaft includes a base portion located within the housing and a protruding portion protruding from the housing in the second direction of the base portion, the transmission mechanism includes an output gear, and the housing includes: an opening through which the output shaft passes from the inside of the housing to the outside; and a cylindrical portion that is coaxial with the opening portion and rotatably supports an end portion of the base portion in the first direction, the cylindrical portion including a cutout groove that extends from one end in the second direction in the axial direction, the first assist spring including: a spiral first spring body portion surrounding the cylindrical portion from an outer peripheral side; a first housing-side locking portion extending from the first-direction end of the first spring main body portion toward a radially inner peripheral side and passing through the cutout groove; and a first projecting portion projecting from the second-direction end of the first spring main body portion in the second direction, the base portion including: an insertion portion inserted into the cylindrical portion; an annular portion that contacts the cylindrical portion from an outer peripheral side on an outer peripheral side of the insertion portion; a first spring locking portion for locking the first protrusion portion; and a gear fixing portion for coaxially fixing the output gear in a non-rotatable state in a second direction of the insertion portion.
According to the present invention, the first assist spring is positioned on the outer peripheral side of the cylindrical portion rotatably supporting the insertion portion of the output shaft. Further, in the output shaft, the gear fixing portion to which the driving force from the motor is transmitted is located in the second direction of the insertion portion. Further, the protrusion portion connected to the opening and closing member is located in the second direction of the gear fixing portion. Thus, the first auxiliary spring is not located between the gear fixing portion to which the driving force from the motor is transmitted and the protruding portion to which the opening/closing member is connected. Therefore, the protrusion of the output shaft to which the opening-closing member is connected and the portion to which the driving force from the motor is transmitted can be prevented from being separated in the axial direction by the arrangement of the first auxiliary spring.
Here, the first housing-side engaging portion of the first auxiliary spring is engaged with the cylindrical portion in a state of penetrating through a slit provided in the cylindrical portion of the housing in the radial direction. Therefore, when the output shaft rotates in the first rotational direction and the first auxiliary spring stores elastic energy, the deformation of the first auxiliary spring causes the first housing-side locking portion to contact the inner wall of the notch on one side in the circumferential direction, and the notch is intended to be expanded. When the notch is expanded, the cylindrical portion supporting the output shaft may be deformed or broken. In response to the above problem, the base portion includes an annular portion that contacts the cylindrical portion from the outer peripheral side, on the outer peripheral side of the insertion portion inserted into the cylindrical portion. Therefore, the cylindrical portion provided with the notch is held by the base portion from the inner circumferential side and the outer circumferential side. Therefore, even when a force for deforming the cylindrical portion is applied from the first housing-side locking portion due to the deformation of the first auxiliary spring, the cylindrical portion can be prevented or suppressed from being deformed or broken.
In the present invention, the cylindrical portion may include: a large-diameter barrel portion; a small-diameter cylinder portion having a smaller outer diameter than the large-diameter cylinder portion in the second direction of the large-diameter cylinder portion; and an annular end surface facing the second direction between the large-diameter cylindrical portion and the small-diameter cylindrical portion, the annular portion being in contact with the small-diameter cylindrical portion from an outer peripheral side and in contact with the annular end surface from the second direction. Thus, the output shaft can be supported from the first direction side by the annular end surface of the cylindrical portion.
In the present invention, it may be provided that there is a reinforcing member having a higher rigidity than the housing and fixed to an inner side of the housing, the base portion includes a supported portion having a circular outer peripheral surface in the second direction of the gear fixing portion, the reinforcing member including: a through hole for the base to pass through; and a bearing portion that extends in the axial direction from an opening edge of the through hole and rotatably supports the bearing-receiving portion from an outer peripheral side. In this way, the output shaft can be rotatably supported by the cylindrical portion of the housing and the bearing portion of the reinforcing member. Further, the rigidity of the reinforcing member including the bearing portion is higher than that of the housing. Therefore, the output shaft can be prevented or suppressed from being inclined when the opening/closing member is opened or closed.
In the present invention, a second assist spring that accumulates elastic potential energy that rotates the output shaft in a second rotational direction opposite to the first rotational direction when the output shaft rotates in the first rotational direction may be provided, the second assist spring including: a spiral second spring body portion disposed on an outer peripheral side of the first auxiliary spring; a second housing-side engaging portion that protrudes from one end of the second spring body portion in the first direction and engages with the housing; and a second projecting portion projecting in the second direction from one end of the second spring main body portion in the second direction, the output gear including a second spring retaining portion to which the second projecting portion is retained. In this way, the rotation of the output shaft in the second rotational direction can be assisted by the first assist spring and the second assist spring. The second assist spring is disposed on the outer peripheral side of the first assist spring. Therefore, the second auxiliary spring is not located between the protruding portion connecting the opening-closing member and the gear fixing portion to which the driving force from the motor is transmitted in the axial direction. Therefore, the protrusion of the output shaft that connects the opening and closing member and the gear fixing portion to which the driving force from the motor is transmitted can be prevented from being separated in the axial direction by the arrangement of the second auxiliary spring.
In the present invention, the output shaft may be made of resin, the base portion may include a connecting portion having a larger outer diameter than the insertion portion between the gear fixing portion and the insertion portion, the annular portion may protrude in the first direction from an outer peripheral edge of an end surface of the connecting portion in the first direction, an annular end surface portion of the end surface of the connecting portion in the first direction, which is located radially between the annular portion and the insertion portion, may include a hole extending in the second direction, and the hole may reach the bearing receiving portion. In this way, since the thickness of the output shaft can be adjusted through the hole, the shrinkage of the resin after molding can be suppressed when the output shaft is molded by injection molding or the like. Therefore, the output shaft is easily molded into a desired shape.
In the present invention, the case may be made of resin, and the reinforcing member may be made of metal. Thus, the shape of the housing can be easily formed into a desired shape. Further, it is easy to make the rigidity of the reinforcing member higher than that of the housing. Further, since the output shaft is rotatably supported by the metal reinforcing member, the output shaft is easily prevented or suppressed from being inclined.
In the present invention, it may be provided that the output shaft includes: a resin output shaft main body; and a metallic columnar member coaxially fixed to the output shaft main body, wherein the insertion portion is an end portion of the columnar member in the first direction. Thus, since the output shaft includes a metal portion, the rigidity of the output shaft is improved. Therefore, the output shaft held by the cylindrical portion can be prevented or suppressed from tilting.
Next, the toilet lid opening and closing unit of the present invention has the above opening and closing member driving device, and the opening and closing member is a toilet lid.
According to the present invention, since the opening/closing member driving means includes the first assist spring, it is possible to assist the rotation of the output shaft driven by the motor when the toilet lid connected to the protruding portion of the output shaft is opened from the laid-down posture to the erected posture. Further, the first auxiliary spring is not located between the gear fixing portion to which the driving force from the motor is transmitted and the protrusion portion to which the toilet lid is attached. Therefore, the protrusion of the output shaft that connects the toilet lid and the portion to which the driving force from the motor is transmitted can be prevented from being separated in the axial direction by the arrangement of the first assist spring. Therefore, the output shaft can be prevented or suppressed from being deformed by a load applied to the output shaft from the toilet lid side.
In the present invention, the first assist spring is disposed on the outer peripheral side of the insertion portion located at the first direction one end of the output shaft. Thus, the first auxiliary spring is not located between the gear fixing portion to which the driving force from the motor is transmitted and the protruding portion to which the opening/closing member is connected. Therefore, the configuration of the first auxiliary spring can avoid the situation that the protruding portion of the output shaft connected with the opening and closing member and the portion transmitted with the driving force from the motor are separated in the axial direction to cause the deformation of the output shaft.
Drawings
Fig. 1 is an external perspective view of an opening/closing member driving device.
Fig. 2 is an explanatory view of the toilet lid opening and closing unit.
Fig. 3 is a 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 a perspective view of the middle housing.
Fig. 6 is an exploded perspective view of the output shaft, the output gear, the first assist spring, and the second assist spring as viewed from the axial direction.
Fig. 7 is an exploded perspective view of the output shaft, the output gear, the first assist spring, and the second assist spring as viewed from the opposite side of fig. 6.
Fig. 8 is a perspective view of the motor, transmission mechanism, and output shaft viewed from the axial direction.
Fig. 9 is a perspective view of the motor, the transmission mechanism, and the output shaft as viewed from the opposite side to fig. 8.
Fig. 10 is a plan view of the second housing, the first assist spring, and the second assist spring.
Fig. 11 is an explanatory diagram of an output shaft of a modification.
(symbol description)
1 opening and closing member drive device
3 toilet lid opening and closing unit
6 electric motor
7 output shaft
8 transfer mechanism
9 casing
10 case opening part
11 projecting part
12 base
13 first side wall
14 second side wall
15 third side wall
16 fourth side wall
17 plate part
17a plate part through hole
18-shaft support part
21 first casing
22 middle shell
23 second housing
24 barrel part
24a cutting groove
24b large-diameter cylinder part
24c minor-diameter cylinder part
24d annular end face
25 bottom wall part
26 first frame part
27 rotating shaft
28 Motor body
30 bearing component
31 middle bottom
32 middle frame part
32a first frame part
32b second frame part
32c first notch part
32d second notch part
33 middle shell opening part
34 shaft holding part
35 reinforcing member
35a reinforcing member opening
35b projection
35c projection
36 bearing part
37 potentiometer
39 insertion part
40 Gear fixing part
40a end face
41 connection part
41a end face
42 first spring locking hole
43 annular part
44 bearing part
45 supported part
46 holes
48 worm
49 first gear
49a first large diameter gear
49b first small-diameter gear
50 second gear
50a second large-diameter gear
50b second small-diameter gear
51 third gear
51a third large-diameter gear
51b third small-diameter gear
52 fourth gear
53 output gear
55 first supporting shaft
56 Torque limiter
57 shaft holding part
58 second fulcrum
59 third support shaft
61 recess
62 convex part
63a first spring body part
63b first case side locking part
63c first projection
64a second spring body portion
64b second-case-side engaging portion
64c second projection
65 through hole
66 first locking part of second helical spring
67 second coil spring second locking part
70 ring groove
71O-ring
73 first projection
74 second projection
76 gap
77 gap
81 potential gear
82 detection part
83 base plate
86 terminal pin
87 terminal pin holding part
100 output shaft body
101 columnar member
200 toilet unit
201 toilet lid
202 main body of toilet
203 toilet seat
204 box
Detailed Description
Hereinafter, an embodiment of the toilet lid opening and closing unit according to the present invention will be described with reference to the accompanying drawings.
(Overall Structure)
Fig. 1 is an external perspective view of an opening/closing member driving device. Fig. 2 is an explanatory view of the toilet lid opening and closing unit. Fig. 3 is a 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 a perspective view of the middle housing. Fig. 6 is an exploded perspective view of the output shaft, the output gear, the first assist spring, and the second assist spring as viewed from the axial direction. Fig. 7 is an exploded perspective view of the output shaft, the output gear, the first assist spring, and the second assist spring as viewed from the opposite side of fig. 6. Fig. 8 is a perspective view of the motor, transmission mechanism, and output shaft viewed from the axial direction. Fig. 9 is a perspective view of the motor, the transmission mechanism, and the output shaft as viewed from the opposite side to fig. 8. Fig. 10 is a plan view of the second housing, the first assist spring, and the second assist spring.
The opening/closing member driving device 1 shown in fig. 1 rotates and opens and closes an opening/closing member such as a cover or a door. The toilet lid opening/closing unit 3 is configured such that a 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, as shown in fig. 2, the toilet unit 200 has a toilet body 202, a toilet seat 203, a toilet lid 201, and a tank 204. An end portion of the toilet lid 201 on the side of the case 204 is connected to the output shaft 7 of the opening-closing member driving device 1. The toilet lid 201 is moved between a closed position of being laid down on the toilet main body 202 and an open position of being raised from the toilet main body 202 by the rotation of the output shaft 7. Further, the toilet unit 200 may be provided with the second opening/closing member driving device 1, 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 connected with the toilet lid 201; a transmission mechanism 8 for transmitting the driving force of the motor 6 to the output shaft 7; and a housing 9 that houses the motor 6 and the transmission mechanism 8.
The output shaft 7 includes: a protruding portion 11 protruding from the case opening portion 10 of the case 9; and a base 12 housed in the housing 9. The end of the toilet lid 201 is connected to the projection 11 of the output shaft 7. Therefore, the opening/closing member driving device 1 opens and closes the toilet lid 201 in a cantilever state. As shown in fig. 1, the housing 9 has a shape elongated in one direction when viewed from a direction along the axis L of the output shaft 7. The output shaft 7 protrudes outward of the housing 9 from an end portion in the longitudinal direction of the housing 9.
In the following description, three directions orthogonal to each other are referred to as an X-axis direction, a Y-axis direction, and a Z-axis direction. The Z-axis direction is an axial direction along the axis L of the output shaft 7, the Y-axis direction is a longitudinal direction of the housing 9, and the X-axis direction is a width direction of the housing 9. In the Z-axis direction, the side from which the output shaft 7 protrudes is set as the + Z direction, and the opposite side is set as the-Z direction. One side in the X-axis direction is defined as the-X direction, and the other side is defined as the + X direction. One side in the Y-axis direction is set as the-Y direction, and the other side is set as the + Y direction. The output shaft 7 protrudes outward of the housing 9 from an end portion in the + Y direction of the Y axis direction of the housing 9. The direction around the axis L is a circumferential direction, and the direction perpendicular to the axis L is a radial direction.
The case 9 is made of resin. As shown in fig. 1, the housing 9 includes a first side wall 13 and a second side wall 14 extending in parallel in the Y-axis direction. Further, the housing 9 includes a third side wall 15 extending in the X-axis direction and connecting one end in the-Y direction of the first side wall 13 and one end in the-Y direction of the second side wall 14. Further, the housing 9 includes a fourth side wall 16 connecting one end in the + Y direction. The fourth side wall 16 has a shape that protrudes in the + Y direction between the first side wall 13 and the second side wall 14.
As shown in fig. 1 and 3, the housing 9 includes a first housing 21, an intermediate housing 22, and a second housing 23 arranged in the Z-axis direction. The first housing 21 is located in the-Z direction of the intermediate housing 22, and the second housing 23 is located in the + Z direction of the intermediate housing 22.
As shown in fig. 4, the first housing 21 includes: a bottom wall portion 25 which is an end surface of the housing 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 end portions in the-Z 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 motor 6 is fixed to the first housing 21. The motor 6 includes: a motor main body 28; a rotary shaft 27 protruding from the motor main body 28; and a pair of motor terminals 29 protruding from the motor main body 28 to the opposite side of the rotary shaft 27. The rotation shaft 27 is located in the-Y direction of the motor main body 28. The rotary shaft 27 faces in a direction intersecting the axis L of the output shaft 7. In this example, the rotary shaft 27 is oriented in a direction perpendicular to the axis L of the output shaft 7. Further, the rotation shaft 27 is inclined with respect to the Y-axis direction (the longitudinal direction of the housing 9) when viewed from the Z-axis direction. The front end of the rotary shaft 27 is rotatably supported by a bearing member 30.
The intermediate housing 22 includes: a middle bottom 31; and a middle frame portion 32 extending in the + Z direction from the outer peripheral edge of the middle bottom portion 31. The middle frame portion 32 constitutes a middle 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 housing 22 accommodates a part of the plurality of gears constituting the transmission mechanism 8.
As shown in fig. 5, a cylindrical portion 24 protruding in the + Z direction is provided on the intermediate bottom portion 31 of the intermediate case 22. The cylindrical portion 24 is a bearing that rotatably supports an end portion of the output shaft in the-Z direction. The cylindrical portion 24 includes a slit 24a extending from one end in the + Z direction in the Z axis direction. Further, the cylindrical portion 24 includes, from the-Z direction side toward the + Z direction side: the large-diameter cylindrical portion 24 b; a small-diameter cylindrical portion 24c having an outer diameter smaller than that of the large-diameter cylindrical portion 24 b; and an annular end surface 24d facing in the + Z direction between the large-diameter cylindrical portion 24b and the small-diameter cylindrical portion 24 c.
As shown in fig. 4, a plate-shaped reinforcing member 35 is fixed to an end portion of the intermediate case 22 on the second case 23 side. The reinforcing member 35 is made of metal and has higher rigidity than the case 9. In this example, the reinforcing member 35 is a sheet metal. The reinforcing member 35 is provided with a reinforcing member opening 35a having a base portion penetrating in the Z-axis direction. The reinforcing member is provided with a cylindrical bearing portion 36 protruding in the + Z direction from the opening edge of the reinforcing member opening 35 a. Further, a potentiometer 37 is attached to the reinforcing member 35. The potentiometer 37 is located at an end portion on the opposite side to the output shaft 7 in the Y-axis direction.
The second case 23 (case portion) is plate-shaped, covers the reinforcing member 35 from the + Z direction, and is fixed to the intermediate case 22. The second housing 23 constitutes an end surface of the housing 9 in the + Z direction. The second housing 23 includes a plate portion 17 which becomes an end surface of the housing 9 in the + Z direction. The plate portion 17 includes a plate portion through hole 17a through which the output shaft 7 passes. The second housing 23 includes a shaft support portion 18 protruding in the + Z direction from an opening edge of the plate portion through hole 17a of the plate portion 17. The plate portion through hole 17a and the shaft support portion 18 are coaxially provided. The output shaft 7 penetrates the plate portion through hole 17a and the shaft support portion 18 inside the housing 9, and protrudes outward of the housing 9 from the housing opening 10, which is one end of the shaft support portion 18 in the + Z direction.
Here, the cylindrical portion 24 provided at the intermediate bottom portion 31 of the intermediate case 22 is provided at a position overlapping the case opening portion 10 when viewed from the Z-axis direction. The cylindrical portion 24 is coaxial with the housing opening 10, the plate portion through hole 17a, and the shaft support portion 18.
The output shaft 7 is made of resin. As shown in fig. 3, the base portion 12 of the output shaft 7 includes an insertion portion 39 that is inserted into the cylindrical portion 24 at one end in the-Z direction. As shown in fig. 6 and 7, the base 12 includes a gear fixing portion 40, and the output gear 53 is coaxially fixed to the gear fixing portion 40 in a non-rotatable state in the second direction of the insertion portion 39. The gear fixing portion 40 has an outer diameter larger than that of the insertion portion 39. As shown in fig. 3 and 6, the base plate 12 includes a connecting portion 41 that connects the gear fixing portion 40 and the insertion portion 39. The connecting portion 41 has an outer diameter larger than the outer diameter of the insertion portion 39 and smaller than the outer diameter of the gear fixing portion 40. As shown in fig. 6, an annular end surface 40a facing in the-Z direction is provided between the gear fixing portion 40 and the connecting portion 41. An annular end surface 41a facing in the-Z direction is provided between the connection portion 41 and the insertion portion 39.
A first spring locking hole 42 (first spring locking portion) extending in the + Z direction is formed in an end surface 40a of the gear fixing portion 40. An annular portion 43 protruding in the-Z direction from the outer peripheral edge is provided on the end surface 41a of the connecting portion 41. The annular portion 43 is located on the outer peripheral side of the insertion portion 39. A gap exists between the annular portion 43 and the insertion portion 39.
As shown in fig. 6 and 7, the base portion 12 includes, in order from the gear fixing portion 40 toward the + Z direction: a bearing-receiving portion 44 having a circular outer peripheral surface facing radially outward; and a supported portion 45 having a circular outer peripheral surface facing radially outward. The outer diameter of the supported portion 44 is larger than the outer diameters of the gear fixing portion 40 and the supported portion 45. The supported portion 45 includes an annular groove 70 in the middle in the Z-axis direction. An O-ring 71 is mounted in the annular groove 70.
Here, as shown in fig. 3, holes 46 are provided at a plurality of circumferential locations in an annular end surface portion located radially between the annular portion 43 and the insertion portion 39 on an end surface 41a in the-Z direction of the connection portion 41. The hole 46 extends in the + Z direction from the end surface portion of the connection portion 41. One end of the hole 46 in the + Z direction reaches the bearing-receiving portion 44. The wall thickness of the output shaft 7 is adjusted by providing the output shaft 7 with a hole 46. Therefore, when the output shaft 7 is molded by injection molding or the like, the resin after molding can be suppressed from shrinking. Therefore, the output shaft 7 is easily molded into a desired shape.
Next, as shown in fig. 8 and 9, the transmission mechanism 8 includes a worm 48, a first gear 49, a second gear 50, a third gear 51, a fourth gear 52 (front stage gear), and an output gear 53 from the upstream side toward the downstream side on the drive force transmission path from the motor 6 to the output shaft 7. The worm 48 is fixed to the outer peripheral side of the rotary shaft 27. The worm 48 and the first gear 49 are located within the first housing 21. The second gear 50, the third gear 51, the fourth gear 52, and the output gear 53 are located within the intermediate housing 22. The worm 48, the first gear 49, the second gear 50, the third gear 51, the fourth gear 52, and the output gear 53 constitute a transmission path for transmitting the driving force of the motor 6 to the output shaft 7.
The first gear 49 is located in the + X direction of the rotary shaft 27 of the motor 6. The first gear 49 includes: a first large diameter gear 49a meshing with the worm 48; and a first small-diameter gear 49b coaxial with the first large-diameter gear 49a and having a smaller outer diameter than the first large-diameter gear 49 a. The first large-diameter gear 49a is located in the-Z direction of the first small-diameter gear 49 b. The first gear 49 is rotatably supported by a first support shaft 55 extending in the Z-axis direction. The end portion of the first fulcrum 55 in the-Z direction is held by the bottom wall portion 25 of the first housing 21, and the end portion in the + Z direction is held by the intermediate bottom portion 31 of the intermediate housing 22. As shown in fig. 3, the first gear 49 includes a torque limiter 56 that connects or disconnects transmission of the driving force between the first large-diameter gear 49a and the first small-diameter gear 49 b.
As shown in fig. 8 and 9, the second gear 50 includes: a second large-diameter gear 50a meshing with the first small-diameter gear 49 b; and a second small-diameter gear 50b coaxial with the second large-diameter gear 50a and having a smaller outer diameter than the second large-diameter gear 50 a. The second large-diameter gear 50a is located in the-Z direction of the second small-diameter gear 50 b. The second large-diameter gear 50a meshes with the first small-diameter gear 49b via the intermediate case opening 33 provided in the intermediate bottom portion 31 of the intermediate case 22 (see fig. 5). The second gear 50 is rotatably supported by a second support shaft 58 extending in the Z-axis direction. The end portion of the second fulcrum 58 in the-Z direction is held by the intermediate bottom 31 of the intermediate case 22, and the end portion in the + Z direction is held by the reinforcing member 35.
The third gear 51 includes: a third large-diameter gear 51a meshing with the second small-diameter gear 50 b; and a third small-diameter gear 51b coaxial with the third large-diameter gear 51a and having a smaller outer diameter than the third large-diameter gear 51 a. The third large-diameter gear 51a is located in the-Z direction of the third small-diameter gear 51 b. The third gear 51 is rotatably supported by a third support shaft 59 extending in the Z-axis direction. The end portion of the third fulcrum 59 in the-Z direction is held by the intermediate bottom 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 59 penetrates the reinforcing member 35.
The fourth gear 52 is a spur gear that meshes with the third small-diameter gear 51b and the output gear 53. The fourth gear 52 and the output gear 53 are aligned in the Y-axis direction. The fourth gear 52 is disposed coaxially with the second gear 50 and is rotatably supported by the second support shaft 58. As shown in fig. 3, the end portion in the-Z direction of the second fulcrum 58 is held by the intermediate case 22, and the end portion in the + Z direction is held by the reinforcing member 35. That is, the intermediate bottom portion 31 of the intermediate case 22 includes a shaft holding portion 34 (see fig. 5) that holds the second support shaft 58 that supports the second gear 50 and the fourth gear 52. The reinforcing member 35 includes a shaft holding portion 57 (see fig. 3) that holds a second support shaft 58 that supports the second gear 50 and the fourth gear 52.
The output gear 53 is made of metal. The output gear 53 is coaxially fixed to the gear fixing portion 40 of the output shaft 7. That is, as shown in fig. 6 and 7, the output gear 53 is annular, and the gear fixing portion 40 of the output shaft 7 is inserted into the central hole thereof. A plurality of recesses 61 are circumferentially provided on the inner peripheral surface of the output gear 53, and a plurality of protrusions 62 that fit into the recesses 61 on the inner peripheral surface of the output gear 53 are provided on the outer peripheral surface of the gear fixing portion 40 of the output shaft 7. Thereby, the output gear 53 and the output shaft 7 are connected in a state of being incapable of relative rotation about the axis L.
Here, the transmission mechanism 8 includes a first assist spring 63 and a second assist spring 64. The first assist spring 63 and the second assist spring 64 are both coil springs and are located in the-Z direction of the output gear 53. The first auxiliary spring 63 includes: a spiral first spring body 63a surrounding the tube 24 of the intermediate bottom 31 of the intermediate case 22 from the outer peripheral side; a first housing-side locking portion 63b extending radially inward from one end of the first spring body portion 63a in the-Z direction; and a first projecting portion 63c projecting in the + Z direction from one end in the + Z direction of the first spring main body portion 63 a. The first spring main body portion 63a is located radially outward of the connecting portion 41, the annular portion 43, and the insertion portion 39. As shown in fig. 3 and 10, the first housing-side locking portion 63b protrudes toward the inner peripheral side of the cylindrical portion 24 through the cutout groove 24a of the cylindrical portion 24 of the intermediate housing 22. The first protrusion 63c is inserted into the first spring locking hole 42 provided in the end surface 40a of the gear fixing portion 40 of the output shaft 7.
The second assist spring 64 includes: a spiral second spring body 64a disposed on the outer peripheral side of the first auxiliary spring 63; a second housing-side locking portion 64b protruding in the-Z direction from one end of the second spring body portion 64a in the-Z direction; and a second projecting portion 64c projecting in the + Z direction from one end in the + Z direction of the second spring main body portion 64 a. As shown in fig. 10, the second housing-side engaging portion 64b protrudes in the-Z direction from a through hole 65 provided in the intermediate bottom portion 31 of the intermediate housing 22, and is engaged with a second coil spring first engaging portion 66 provided in the first housing 21 (see fig. 4). The second protrusion 64c is inserted into a second coil spring second engaging portion 67 provided on the outer peripheral surface of the output gear 53 so as to be engageable therewith. As shown in fig. 6 and 7, the second coil spring second locking portion 67 is a notched portion provided in the tooth portion of the output gear 53. The second projection 64c can abut against the output gear 53 from the circumferential direction. The second auxiliary spring 64 is rectangular in cross section.
(output shaft support structure)
As shown in fig. 3, the insertion portion 39 of the output shaft 7 located at one end in the-Z direction is inserted into the cylindrical portion 24 of the intermediate bottom portion 31 of the intermediate housing 22 and is rotatably supported. In a state where the insertion portion 39 is inserted into the tube portion 24, the annular portion 43 located on the outer peripheral side of the insertion portion 39 contacts the end portion of the tube portion 24 in the + Z direction from the outer peripheral side. That is, the annular portion 43 contacts the outer peripheral surface of the small-diameter cylindrical portion 24c of the cylindrical portion 24. Further, an end surface of the annular portion 43 in the-Z direction is in contact with an annular end surface 24d facing in the + Z direction between the large-diameter cylindrical portion 24b and the small-diameter cylindrical portion 24 c. Thereby, the end portion of the output shaft 7 in the-Z direction is supported by the cylindrical portion 24 so as to be rotatable about the axis L, and is supported from the-Z direction side by the annular end surface 24d of the cylindrical portion 24.
Further, the supported bearing 44 of the output shaft 7 is rotatably supported from the outer peripheral side by the bearing 36 of the reinforcing member 35. The supported portion 45 of the output shaft 7 is rotatably supported from the outer peripheral side by the shaft support portion 18 of the second housing 23. The O-ring 71 fixed to the supported portion 45 is compressed in the radial direction between the output shaft 7 and the shaft supporting portion 18.
(fixing Structure of reinforcing Member)
Next, the reinforcing member 35 is fixed to the intermediate housing 22 between the bearing portion 36 and the shaft holding portion 57 in the Y-axis direction.
That is, as shown in fig. 5, in the intermediate frame portion 32, the intermediate case 22 includes a first protrusion 73 and a second protrusion 74 protruding toward the inner peripheral side in the first frame portion 32a and the second frame portion 32b extending in parallel in the Y-axis direction, respectively. The first projection 73 and the second projection 74 are provided with screw holes, respectively. Further, the first frame portion 32a includes a rectangular first notch portion 32c at a position where the first protrusion 73 is provided. The second frame portion 32b includes a rectangular second notch portion 32d at a position where the second protrusion 74 is provided. The first projection 73 and the second projection 74 are opposed in the X-axis direction.
On the other hand, as shown in fig. 4, the reinforcing member 35 includes a pair of protruding portions 35b, 35c protruding to both sides in the X-axis direction between the bearing portion 36 and the shaft holding portion 57 in the Y-axis direction. The protruding portions 35b and 35c are provided with through grooves. In the reinforcing member 35, the projection 35b in the-X direction is inserted into the first notch 32c of the first frame portion 32a from the + Z direction, and abuts against the first projection 73. In the reinforcing member 35, the projecting portion 35c in the + X direction is inserted into the second notch portion 32d of the second frame portion 32b from the + Z direction, and abuts against the second projection 74. The reinforcing member 35 is fixed to the intermediate case 22 by screws 75 that pass through the second case 23 and the through grooves of the projections 35b and are screwed into the screw holes of the first projections 73. The reinforcing member 35 is fixed to the intermediate case 22 by screws 75 that pass through the second case 23 and the through grooves of the projections 35c and are screwed into the screw holes of the second projections 74.
In a state where the reinforcing member 35 is fixed to the intermediate case 22, a gap 76 is partially provided between the reinforcing member 35 and the first frame portion 32a, and a gap 77 is partially provided between the reinforcing member 35 and the second frame portion 32 b. That is, in a state where the reinforcing member 35 is fixed to the housing 9, a portion (gap 76) that does not contact each other is provided between the reinforcing member 35 and the first side wall 13. Further, a portion (gap 77) which does not contact each other is provided between the reinforcing member 35 and the second side wall 14.
(potentiometer)
As shown in fig. 8, the potentiometer 37 includes a potential gear 81 that meshes with any one of a plurality of gears constituting the transmission mechanism 8. Further, as shown in fig. 4, the potentiometer 37 includes a detection unit 82 that detects the rotational angle position of the potential gear 81. The potential gear 81 is located in the-Z direction of the reinforcing member 35 and meshes with the third small-diameter gear 51b of the third gear 51. The detection portion 82 is fixed to the reinforcing member 35 via a substrate 83. Here, a wiring (not shown) for supplying electric power to the motor 6 is connected between the substrate 83 and the pair of motor terminals 29. A plurality of terminal pins 86 connected to the wiring and the potentiometer 37 are fixed to the substrate 83. As shown in fig. 5, the intermediate housing 22 includes a terminal pin holding portion 87 at one end in the-Y direction of the Y axis direction of the intermediate frame portion 32.
(action)
When the motor 6 is driven in the forward direction or the reverse direction by supplying electric power through the terminal pin 86, the driving force of the motor 6 is transmitted to the output shaft 7 through the transmission mechanism 8. Therefore, as shown in fig. 2, the toilet lid 201 fixed to the output shaft 7 rotates in a closing direction a (first rotation direction) toward the closed position or an opening direction B (second rotation direction) toward the open position. When the toilet lid 201 rotates, a signal corresponding to the rotational angle position of the toilet lid 201 is output from the potentiometer 37.
When the toilet lid 201 connected to the output shaft 7 rotates in the closing direction a, the first assist spring 63 and the second assist spring 64 accumulate elastic force for rotating the output shaft 7 in the opening direction B about the axis L. Therefore, when the toilet lid 201 is rotated in the opening direction B, the first assist spring 63 and the second assist spring 64 urge the output shaft 7 driven in the opening direction B by the motor 6 in the opening direction B, thereby assisting the opening operation. Further, the transmission mechanism 8 includes a torque limiter 56 at the first gear 49. Therefore, when an excessive load is applied from the toilet lid 201 to the transmission mechanism 8 via the output shaft 7, the torque limiter 56 acts to block the transmission of the driving force by the transmission mechanism 8. This prevents the transmission mechanism 8 from being damaged by an excessive load from the outside.
(effective effect)
According to the present invention, the first assist spring 63 is disposed on the outer peripheral side of the cylinder 24 that rotatably supports the insertion portion 39 of the base portion 12 of the output shaft 7. Further, in the output shaft 7, the gear fixing portion 40 to which the driving force from the motor 6 is transmitted is located in the + Z direction of the insertion portion 39. Further, in the output shaft 7, the protruding portion 11 to which the toilet lid 201 is connected is located in the + Z direction of the gear fixing portion 40. Thus, the first auxiliary spring 63 is not positioned between the gear fixing portion 40 to which the driving force from the motor 6 is transmitted and the protrusion 11 to which the toilet lid 201 is connected in the Z-axis direction. Therefore, the protrusion 11 of the output shaft 7 to which the toilet lid 201 is connected and the gear fixing portion 40 to which the driving force from the motor 6 is transmitted can be prevented from being separated in the Z-axis direction by the arrangement of the first auxiliary spring 63.
Here, the first housing-side engaging portion 63b of the first auxiliary spring 63 is engaged with the cylindrical portion 24 in a state of penetrating the slit groove 24a provided in the cylindrical portion 24 in the radial direction. Therefore, when the output shaft 7 rotates in the closing direction a for closing the toilet lid 201 and the first assist spring 63 accumulates elastic energy, the deformation of the first assist spring 63 causes the first case side locking portion 63b to contact the inner wall of the slot 24a on one side in the circumferential direction, and the slot 24a is expanded. When the notch 24a is expanded, the cylindrical portion 24 supporting the output shaft 7 may be deformed or broken. In response to the above problem, the base portion 12 includes the annular portion 43 that contacts the tube portion 24 from the outer peripheral side on the outer peripheral side of the insertion portion 39. Therefore, the tube portion 24 provided with the notch 24a is held by the base portion 12 from the inner peripheral side and the outer peripheral side. Therefore, even when a force for deforming the tube portion 24 is applied from the first housing-side locking portion 63b by the deformation of the first auxiliary spring 63, the tube portion 24 can be prevented or suppressed from being deformed or broken.
Further, in this example, the cylindrical portion 24 includes: the large-diameter cylindrical portion 24 b; a small-diameter cylindrical portion 24c having a smaller outer diameter than the large-diameter cylindrical portion 24b in the + Z direction of the large-diameter cylindrical portion 24 b; and an annular end surface 24d facing in the + Z direction between the large-diameter cylindrical portion 24b and the small-diameter cylindrical portion 24 c. Further, the annular portion 43 of the output shaft 37 contacts the small-diameter cylindrical portion 24c from the outer peripheral side and contacts the annular end surface 24d from the + Z direction. Therefore, the output shaft 7 can be supported from the-Z direction by the annular end surface 24d of the cylindrical portion 24.
In this example, the reinforcing member 35 has higher rigidity than the case 9 and is fixed to the inside of the case 9. The reinforcing member 35 includes a bearing portion 36 that rotatably supports the supported bearing portion 44 of the output shaft 7 from the outer peripheral side. Therefore, the output shaft 7 can be rotatably supported by the cylindrical portion 24 of the housing 9 and the bearing portion 36 of the reinforcing member 35. Further, the rigidity of the reinforcing member 35 including the bearing portion 36 is higher than that of the housing 9. Therefore, the output shaft 7 can be prevented or suppressed from being inclined when the toilet lid 201 is opened or closed.
In this example, a second assist spring 64 is provided, and the second assist spring 64 accumulates elastic force for rotating the output shaft 7 in an opening direction B opposite to the closing direction a when the output shaft 7 rotates in the closing direction a for closing the toilet lid 201. Therefore, the rotation of the output shaft 7 in the opening direction B can be assisted by the first assist spring 63 and the second assist spring 64. Here, the second auxiliary spring 64 is disposed on the outer peripheral side of the first auxiliary spring 63. Therefore, the second assist spring 64 is not located between the gear fixing portion 40, to which the driving force from the motor 6 is transmitted, and the protrusion 11, to which the toilet lid 201 is connected, in the Z-axis direction. Therefore, the projection 11 of the output shaft 7 to which the toilet lid 201 is connected and the portion to which the driving force from the motor 6 is transmitted can be prevented from being separated in the Z-axis direction by the arrangement of the second assist spring 64.
The output shaft 7 is made of resin, and includes a hole 46 extending in the + Z direction and reaching the bearing receiving portion 44, at an end surface 41a in the-Z direction of the connecting portion 41. Since the thickness of the output shaft 7 can be adjusted through the hole 46 in this way, the shrinkage of the resin after molding can be suppressed when the output shaft 7 is molded by injection molding or the like. Therefore, the output shaft 7 is easily molded into a desired shape.
The case 9 is made of resin, and the reinforcing member 35 is made of metal. Therefore, the shape of the housing 9 can be easily formed into a desired shape. Further, it is easy to make the rigidity of the reinforcing member 35 higher than that of the housing 9. Further, since the output shaft 7 is rotatably supported by the metal reinforcing member 35, the output shaft 7 is easily prevented or suppressed from tilting.
In this example, the high-rigidity reinforcing member 35 rotatably supports the output shaft 7 to which the output gear 53 is fixed, and supports the second support shaft 58 of the fourth gear 52 that meshes with the output gear 53. Thus, since the fourth gear 52 and the output gear 53 can be prevented from being displaced in the direction away from each other by an external load, the engagement between the fourth gear 52 and the output gear 53 can be maintained in a normal state. Therefore, the efficiency of transmitting torque to the toilet lid 201 does not deteriorate.
In this example, the output gear 53 and the fourth gear 52 are aligned in the Y-axis direction, and the reinforcing member 35 is fixed to the housing 9 between the bearing portion 36 and the shaft holding portion 57 in the Y-axis direction. That is, the reinforcing member 35 has a pair of projections 35b and 35c located between the bearing portion 36 and the shaft holding portion 57 in the Y-axis direction fixed to the housing 9. Thereby, the reinforcing member 35 is fixed to the housing 9 at a position close to the output gear 53. Therefore, the reinforcing member 35 can be prevented from flexing when a load is applied to the output gear 53 via the output shaft 7.
Here, according to the toilet lid opening and closing unit 3 of the present example, the opening and closing member driving device 1 includes the first assist spring 63 and the second assist spring 64. Therefore, when the toilet lid 201 connected to the protruding portion 11 of the output shaft 7 is opened from the collapsed posture to the raised posture, the rotation of the output shaft 7 driven by the motor 6 can be assisted by the elastic potential energy accumulated in the first assist spring 63 and the second assist spring 64.
(other embodiments)
Fig. 11 is an explanatory diagram of an output shaft of a modification. Fig. 11 shows an output shaft of a modification cut along the axis L. In the opening-closing member driving device 1, the output shaft 7A of fig. 11 may be used instead of the output shaft 7. Since the output shaft 7A includes a structure corresponding to the output shaft 7, the corresponding structure is denoted by the same reference numeral, and the description thereof is omitted.
As shown in fig. 11, the output shaft 7A includes: a resin output shaft body 100; and a metallic columnar member 101 coaxially fixed to the output shaft body 100. The output shaft body 100 includes a gear fixing portion 40, a connecting portion 41, an annular portion 43, a bearing receiving portion 44, a receiving portion 45, and a protruding portion 11. The connecting portion 41 includes a circular recess 100a in the center of an end surface 41a in the-Z direction. The annular portion 43 extends in the-Z direction from the outer peripheral edge of the end surface 41a of the connecting portion 41 in the-Z direction.
The columnar member 101 is cylindrical in shape. The columnar member 101 is disposed coaxially with the output shaft body 100 and partially inserted into the circular recess 100 a. The end portion of the columnar member 101 in the-Z direction and the protruding portion protruding from the connecting portion 41 in the-Z direction are insertion portions 39. In this way, since the output shaft 7A includes a metal portion, the rigidity of the output shaft 7A is improved. Therefore, the output shaft 7 held by the cylindrical portion 24 can be prevented or suppressed from tilting.
Claims (8)
1. An opening-closing member driving device characterized by comprising:
an electric motor;
an output shaft connected to the opening/closing member;
a transmission mechanism that transmits a driving force of the electric motor to the output shaft;
a housing that houses the motor and the transmission mechanism; and
a first assist spring that accumulates elastic potential energy that rotates the output shaft in a second rotational direction opposite to the first rotational direction when the output shaft rotates in the first rotational direction,
when a direction along an axis of the output shaft is set as an axis direction, one side of the axis direction is set as a first direction, and the other side is set as a second direction, the output shaft includes a base portion located within the housing and a protruding portion protruding from the housing in the second direction of the base portion,
the transmission mechanism comprises an output gear and a transmission gear,
the housing includes: an opening through which the output shaft passes from the inside of the housing to the outside; and a cylindrical portion coaxial with the opening portion and rotatably supporting an end portion of the base portion in the first direction,
the cylinder portion includes a cutout groove extending in the axial direction from one end in the second direction,
the first auxiliary spring includes: a spiral first spring body portion surrounding the cylindrical portion from an outer peripheral side; a first housing-side locking portion extending from the first-direction end of the first spring main body portion toward a radially inner peripheral side and passing through the cutout groove; and a first projecting portion projecting from one end of the first spring main body portion in the second direction,
the base includes: an insertion portion inserted into the cylindrical portion; an annular portion that contacts the cylindrical portion from an outer peripheral side on an outer peripheral side of the insertion portion; a first spring locking portion for locking the first protrusion portion; and a gear fixing portion coaxially fixing the output gear in a non-rotatable state in a second direction of the insertion portion.
2. The opening-closing member driving device according to claim 1,
the barrel portion includes: a large-diameter barrel portion; a small-diameter cylinder portion having a smaller outer diameter than the large-diameter cylinder portion in the second direction of the large-diameter cylinder portion; and an annular end surface facing the second direction between the large-diameter cylindrical portion and the small-diameter cylindrical portion,
the annular portion is in contact with the small-diameter cylindrical portion from an outer peripheral side and in contact with the annular end face from the second direction.
3. The opening-closing member driving device according to claim 2,
having a reinforcing member which is higher in rigidity than the housing and which is fixed to the inside of the housing,
the base portion includes a supported portion having a circular outer peripheral surface in the second direction of the gear fixing portion,
the reinforcing member includes: a through hole for the base to pass through; and a bearing portion that extends in the axial direction from an opening edge of the through hole and rotatably supports the bearing-receiving portion from an outer peripheral side.
4. The opening-closing member driving device according to claim 3,
includes a second assist spring that accumulates elastic potential energy that rotates the output shaft in a second rotational direction opposite to the first rotational direction when the output shaft rotates in the first rotational direction,
the second auxiliary spring includes: a spiral second spring body portion disposed on an outer peripheral side of the first auxiliary spring; a second housing-side engaging portion that protrudes from one end of the second spring body portion in the first direction and engages with the housing; and a second projecting portion projecting from the second-direction end of the second spring main body portion in the second direction,
the output gear includes a second spring retaining portion for retaining the second protrusion portion.
5. The opening-closing member driving device according to claim 3 or 4,
the output shaft is made of resin and is provided with a plurality of output shafts,
the base portion includes a connecting portion having a larger outer diameter dimension than the insertion portion between the gear fixing portion and the insertion portion,
the annular portion protrudes in the first direction from an outer peripheral edge of an end surface of the connecting portion in the first direction,
an annular end surface portion of the end surface of the connecting portion in the first direction located radially between the annular portion and the insertion portion includes a hole extending in the second direction,
the hole reaches the supported portion.
6. The opening-closing member driving device according to any one of claims 3 to 5,
the housing is made of a resin and is formed of a resin,
the reinforcing member is made of metal.
7. The opening-closing member driving device according to any one of claims 1 to 6,
the output shaft includes: a resin output shaft main body; and a metallic columnar member coaxially fixed to the output shaft main body,
the insertion portion is an end portion of the columnar member in the first direction.
8. A toilet lid opening and closing unit is characterized in that,
the opening/closing member drive device according to any one of claims 1 to 7,
the opening and closing member is a toilet lid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019205220A JP7382208B2 (en) | 2019-11-13 | 2019-11-13 | Opening/closing member drive device and toilet lid opening/closing unit |
| JP2019-205220 | 2019-11-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112790655A true CN112790655A (en) | 2021-05-14 |
| CN112790655B CN112790655B (en) | 2022-08-05 |
Family
ID=75806162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011271124.5A Active CN112790655B (en) | 2019-11-13 | 2020-11-13 | Opening/closing member drive device and toilet lid opening/closing unit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7382208B2 (en) |
| CN (1) | CN112790655B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7454535B2 (en) * | 2021-09-28 | 2024-03-22 | Toto株式会社 | toilet equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201022668Y (en) * | 2007-05-01 | 2008-02-20 | 浙江星星便洁宝有限公司 | Automatic turning over device for intelligent toilet seat |
| CN203554188U (en) * | 2013-11-21 | 2014-04-16 | 浙江摩尔舒卫生设备有限公司 | Gearbox used for intelligent bidet seat |
| CN103780016A (en) * | 2012-10-22 | 2014-05-07 | 日本电产三协株式会社 | Geared motor |
| CN204995348U (en) * | 2015-08-28 | 2016-01-27 | 深圳市博电电子技术有限公司 | Closestool and a transmission for controlling toilet lid is taken off and land thereof |
| CN105322711A (en) * | 2014-07-02 | 2016-02-10 | 日本电产三协株式会社 | Gear motor and automatic opening and closing unit |
| US20170122420A1 (en) * | 2015-11-03 | 2017-05-04 | Metso Automation Usa, Inc. | Electric actuator with a fail-safe mode of operation |
| JP2017108620A (en) * | 2015-12-09 | 2017-06-15 | モアテック カンパニー リミテッド | Geared motor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007068910A (en) * | 2005-09-09 | 2007-03-22 | Aisin Seiki Co Ltd | Rise and fall control device of rise and fall member |
| JP6084002B2 (en) * | 2012-10-22 | 2017-02-22 | 日本電産サンキョー株式会社 | Geared motor |
| JP6161373B2 (en) * | 2013-04-04 | 2017-07-12 | 日本電産サンキョー株式会社 | Lid opening / closing device |
| JP2016077396A (en) * | 2014-10-14 | 2016-05-16 | 日本電産サンキョー株式会社 | Opening/closing driving device |
| JP2018119644A (en) * | 2017-01-27 | 2018-08-02 | アイシン精機株式会社 | Electric turning device |
-
2019
- 2019-11-13 JP JP2019205220A patent/JP7382208B2/en active Active
-
2020
- 2020-11-13 CN CN202011271124.5A patent/CN112790655B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201022668Y (en) * | 2007-05-01 | 2008-02-20 | 浙江星星便洁宝有限公司 | Automatic turning over device for intelligent toilet seat |
| CN103780016A (en) * | 2012-10-22 | 2014-05-07 | 日本电产三协株式会社 | Geared motor |
| CN203554188U (en) * | 2013-11-21 | 2014-04-16 | 浙江摩尔舒卫生设备有限公司 | Gearbox used for intelligent bidet seat |
| CN105322711A (en) * | 2014-07-02 | 2016-02-10 | 日本电产三协株式会社 | Gear motor and automatic opening and closing unit |
| CN204995348U (en) * | 2015-08-28 | 2016-01-27 | 深圳市博电电子技术有限公司 | Closestool and a transmission for controlling toilet lid is taken off and land thereof |
| US20170122420A1 (en) * | 2015-11-03 | 2017-05-04 | Metso Automation Usa, Inc. | Electric actuator with a fail-safe mode of operation |
| JP2017108620A (en) * | 2015-12-09 | 2017-06-15 | モアテック カンパニー リミテッド | Geared motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112790655B (en) | 2022-08-05 |
| JP2021078306A (en) | 2021-05-20 |
| JP7382208B2 (en) | 2023-11-16 |
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