CN112790654A - 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
- CN112790654A CN112790654A CN202011270076.8A CN202011270076A CN112790654A CN 112790654 A CN112790654 A CN 112790654A CN 202011270076 A CN202011270076 A CN 202011270076A CN 112790654 A CN112790654 A CN 112790654A
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- output shaft
- opening
- housing
- gear
- rod
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- 230000002093 peripheral effect Effects 0.000 claims abstract description 51
- 238000005192 partition Methods 0.000 claims description 72
- 230000005540 biological transmission Effects 0.000 claims description 30
- 239000002184 metal Substances 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 11
- 238000000638 solvent extraction Methods 0.000 claims description 2
- 230000007423 decrease Effects 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- 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
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Toilet Supplies (AREA)
- General Details Of Gearings (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Gear Transmission (AREA)
Abstract
An opening/closing member drive device and a toilet lid opening/closing unit are provided which can suppress a decrease in rigidity of an output shaft even when a load generating mechanism for holding an opening/closing member at a predetermined rotational angle position of the output shaft around an axis is provided. The opening/closing member drive device is provided with a load generation mechanism (73) which applies a load to the output shaft (7) when the output shaft passes through a predetermined rotational angle position. The load generating mechanism includes: a first rod-shaped member (39) that is inserted into a cutout groove (19a) formed in a cylindrical portion (19) of the housing located on the outer peripheral side of the output shaft; an elastic member that contacts the first rod-like member from the outside of the tube portion) and protrudes the first rod-like member from the tube portion to the radially inner side; and a projection (47) that projects radially outward from a first shaft portion (41) of the output shaft that is located radially inward of the cylindrical portion. Thus, the load generating mechanism is provided outside the output shaft, and therefore, a decrease in the rigidity of the output shaft can be suppressed.
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 driving device 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 protrusion portion protruding outward from an opening portion provided in the housing; and a base located inside the housing. The projection is connected to the 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.
Further, the opening/closing member driving device includes a holding mechanism that prevents the opening/closing member such as a toilet lid from naturally returning to the laid-down posture due to its own weight or the like when the opening/closing member is rotated from the laid-down posture and opened to the standing posture. The holding mechanism is formed on the inner peripheral side of the gear portion by a recess provided on the lower end surface of the gear portion.
The holding mechanism includes a fixing member having an annular portion. The fixing member is fixed to the housing. The annular portion is disposed coaxially with the gear portion in the recess. Here, the output shaft includes a protruding portion extending coaxially with the gear portion within the recess from a center of a bottom surface of the recess. The annular portion surrounds the protruding portion from the outer peripheral side. Further, the annular portion includes an opening extending in the axial direction. Further, the holding mechanism includes: a first pin inserted into the opening in a state of being movable in a radial direction; a second pin fixed to an outer peripheral surface of the projection; and a coil spring disposed on an outer peripheral side of the annular portion and configured to project the first pin inward in a radial direction of the annular portion. In the holding mechanism, when the output shaft passes through a predetermined rotational angle position, the second pin moves the first pin radially outward against the biasing force of the coil spring. Therefore, when the torque applied to the output shaft due to the own weight of the opening/closing member or the like is smaller than the biasing force of the coil spring, the opening/closing member connected to the output shaft can be held in a state of being stopped at a predetermined rotational angle position.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open No. 2014-200458
When the second pin moves the first pin radially outward, the coil spring of the holding mechanism expands toward the outer peripheral side. Therefore, a gap needs to be provided between the coil spring disposed in the recess of the output shaft and the peripheral wall surface of the recess. Therefore, according to the configuration in which the holding mechanism is provided in the recess provided in the gear portion, the rigidity of the end portion of the output shaft is easily reduced. Here, the output shaft of the opening/closing member driving device opens and closes the opening/closing member connected to the protruding portion in a cantilever state. Therefore, a load is applied to the output shaft from the opening/closing member side. Further, a gear portion that receives a driving force from the transmission mechanism is integrally provided in the base portion. Therefore, a load is applied to the output shaft from one side of the drive mechanism. Therefore, according to the structure in which the recess is formed in the output shaft and the holding mechanism is provided inside thereof, there is a possibility that deformation or the like of the output shaft may be caused by a load applied to the output shaft.
Disclosure of Invention
In view of the above-described aspects, a technical problem of the present invention is to provide an opening-closing member driving device and a toilet lid opening-closing unit in which a reduction in rigidity of an output shaft can be prevented or suppressed even in the case where a load generating mechanism for holding an opening-closing member at a prescribed rotational angular position about an axis of the output shaft is provided.
In order to solve the above-described problems, an opening/closing member driving device according to 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; a partition member fixed to an inner side of the case and partitioning the inner side of the case; and a load generating mechanism that applies a load to the output shaft when the output shaft passes through a predetermined rotational angle position, wherein the output shaft includes, when a direction along an axis of the output shaft is an axial direction, a direction orthogonal to the axis is a radial direction, one side of the axial direction is a first direction, and the other side is a second direction: a base located within the housing; and a protruding portion that protrudes from the housing in the second direction of the base portion, the housing including a housing portion that covers the partition member from the second direction side, the housing portion including: an opening through which the output shaft passes from the inside of the housing to the outside; and a cylindrical portion extending coaxially with the opening portion inside the housing, the base portion including: a first shaft portion located radially inward of the cylindrical portion; and a second shaft portion located closer to the first direction than the cylinder portion, the cylinder portion including a cutout groove extending from one end in the first direction in the axial direction, the load generating mechanism including: a rod-shaped member inserted into the slit groove in a state of being movable in the radial direction; an elastic member that contacts the rod-shaped member from the outside of the tube portion and protrudes the rod-shaped member from the tube portion to the inside in the radial direction; and a protrusion protruding radially outward from the first shaft portion, the partition member including: a through hole for the base to pass through; and an annular portion extending in the axial direction from an opening edge of the through hole and holding an end portion of the cylindrical portion in the first direction from an outer peripheral side, wherein when the output shaft passes through the predetermined rotational angle position, the protrusion moves the rod-like member radially outward against an urging force of the elastic member.
In the present invention, a load generating mechanism for holding an opening/closing member at a prescribed rotational angle position about an axis of an output shaft includes: a rod-shaped member inserted into a notch formed in a cylindrical portion of the housing located on an outer peripheral side of the output shaft; an elastic member that contacts the rod-shaped member from the outside of the cylindrical portion and protrudes radially inward from the cylindrical portion; and a protrusion that protrudes radially outward from a first shaft portion of the output shaft that is located radially inward of the cylindrical portion. Thus, since the load generation mechanism can be provided outside the output shaft, a decrease in the rigidity of the output shaft can be suppressed as compared with a case where a recess is formed in the output shaft and the load generation mechanism is provided inside the recess. In the load generating mechanism, when the output shaft passes through a predetermined rotational angle position, the rod-shaped member is moved radially outward by the protrusion protruding outward from the output shaft against the urging force of the elastic member. Therefore, when the torque applied to the output shaft via the opening/closing member is smaller than the urging force of the elastic member, the load generating mechanism can hold the output shaft in a state of being stopped at the predetermined rotational angle position.
Here, when the output shaft passes through a predetermined rotational angle position, the protrusion moves in the circumferential direction around the axis. Therefore, when the protrusion moves the first rod-like member radially outward against the urging force of the elastic member, the protrusion presses the first rod-like member to one side in the circumferential direction. The first rod-like member pressed by the protrusion comes into contact with the inner wall of the notch on one side in the circumferential direction, and attempts to expand the notch. That is, when the output shaft passes through the predetermined rotational angle position, the protruding portion of the output shaft attempts to deform the cylindrical portion via the first rod-shaped member. When the cylindrical portion deforms, the load generation mechanism becomes unable to function. In view of the above problem, the partition member fixed in the housing includes an annular portion that holds an end portion in the first direction of the cylindrical portion in which the cutout groove is open from the outer peripheral side. Therefore, even when the output member repeatedly passes through a predetermined rotational angle position, the deformation or breakage of the tube portion can be prevented or suppressed.
In the present invention, it may be provided that the partition member has higher rigidity than the housing. Thus, the cylindrical portion provided in the housing is easily prevented from being deformed.
In the present invention, it may be provided that the first shaft portion includes: a contact portion including a circular contact surface that contacts an end portion of the cylindrical portion in the first direction from an inner circumferential side of the cylindrical portion; and a small diameter portion having an outer diameter smaller than that of the contact portion in the second direction of the contact portion, wherein the protrusion is provided on the small diameter portion. In this way, the state in which the end portion in the first direction of the cylindrical portion is radially sandwiched by the annular portion of the partition member and the contact portion of the output shaft can be maintained. Therefore, deformation of the tube portion is easily suppressed.
In the present invention, it may be provided that the second shaft portion includes: a large diameter portion having an outer diameter larger than the contact portion; and a gear fixing portion that fixes an output gear of the transmission mechanism in the first direction of the large diameter portion, the large diameter portion including: a circular outer peripheral surface facing radially outward; and an annular abutting surface abutting on the tube portion from the first direction side, the annular portion including, from the first direction side toward the second direction: a bearing portion that supports the large diameter portion to be rotatable; and a cylinder holding portion for holding the cylinder. In this way, the output shaft to which the output gear is fixed can be rotatably supported by the partition member having high rigidity.
The housing may be made of resin, the partition member may be made of metal, a radial thickness dimension of the cylindrical portion may be shorter than the radial dimension of the rod-like member, the radial distance between the circular contact surface and the circular outer peripheral surface may be equal to the radial thickness dimension of the cylindrical portion, and the inner peripheral surface of the cylindrical portion holding portion and the inner peripheral surface of the bearing portion may be continuous in the axial direction without a step. Thus, the rigidity of the partition member can be made higher than that of the housing. In addition, in this way, the annular portion including the tube portion holding portion and the bearing portion can be provided to the partition member by bending the metal partition member by burring or the like.
In the present invention, it may be arranged that an end surface of the output shaft in the first direction includes a circular recess portion recessed in the second direction, the housing includes a column portion inserted into the circular recess portion and rotatably supporting the output shaft, and the column portion and the bearing portion overlap each other when viewed in a direction orthogonal to the axis. Thus, the output shaft can be prevented or suppressed from tilting.
In the present invention, it may be provided that the output shaft includes: a resin output shaft main body; and a second rod-shaped member fixed to the output shaft main body and forming the projection, wherein the first rod-shaped member and the second rod-shaped member are made of metal. Thus, the protrusion can be prevented or suppressed from being worn by contact with the first rod-like member.
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.
The present invention includes a load generating mechanism, thereby enabling the toilet lid to be held at a prescribed rotational angle position against its own weight or the like. Further, the load generating mechanism is provided outside the output shaft, so that the rigidity of the output shaft is easily ensured, and therefore deformation of the output shaft can be prevented or suppressed.
The opening/closing member driving device of the present invention includes a load generating mechanism, and therefore can hold an opening/closing member such as a toilet lid connected to an output shaft at a predetermined rotational angle position. Further, the load generating mechanism is provided outside the output shaft, so that the rigidity of the output shaft can be ensured, and therefore deformation of the output shaft can be prevented or suppressed. Further, when the output shaft passes through the predetermined rotational angle position, the protruding portion of the output shaft attempts to deform the cylindrical portion of the housing via the first rod-shaped member, but since the annular portion of the partition member fixed in the housing holds the cylindrical portion from the outer peripheral side, the cylindrical portion can be prevented or suppressed from being deformed or broken.
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 an exploded perspective view of the second housing, the partition member, the coil spring, the output shaft, and the output gear when viewed from one side in the axial direction.
Fig. 6 is an exploded perspective view of the second housing, the partition member, the coil spring, the output shaft, and the output gear as viewed from the opposite side of fig. 5 in the axial direction.
Fig. 7 is a perspective view of the motor, the transmission mechanism, and the output shaft when viewed from one side in the axial direction.
Fig. 8 is a perspective view of the motor, the transmission mechanism, and the output shaft viewed from the opposite side of fig. 7 in the axial direction.
Fig. 9 is a perspective view of the middle housing as viewed from one side in the axial direction.
Fig. 10 is a sectional view taken along line a-a of fig. 3.
(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 projection
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
19 barrel part
19a cutting groove
21 first casing
22 middle shell
23 second housing
24 second frame part
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 partition member
35a partition member through hole
35b projection
35c projection
36 annular part
36a bearing portion
36b cartridge holding part
37 potentiometer
39 first rod-like member
41 first shaft part
42 second shaft part
43 third shaft part
45 contact part
46 minor diameter portion
46a groove
47 projection
48 big diameter part
48a circular outer peripheral surface
48b annular abutment surface
49 Gear fixing part
50 supported part
51 connecting part
52 circular recess
55 output shaft body
56 second rod-like member
58 worm
59 first gear
59a first large diameter gear
59b first small diameter gear
60 second gear
60a second large-diameter gear
60b second small-diameter gear
61 third gear
61a third major diameter gear
61b third small diameter gear
62 fourth gear
63 output gear
65 first fulcrum
66 Torque limiter
68 second fulcrum
69 third fulcrum
70 shaft holding part
71 concave part
72 convex part
73 load generating mechanism
81 column part
81a column part
83 first projection
84 second projection
86 gap
87 gap
91 potential gear
92 detection part
93 base plate
96 terminal pin
97 terminal pin holding part
200 toilet unit
201 toilet lid
202 main body of toilet
203 toilet seat
204 box
L axis
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 an exploded perspective view of the second housing, the partition member, the coil spring, the output shaft, and the output gear when viewed from one side in the axial direction. Fig. 6 is an exploded perspective view of the second housing, the partition member, the coil spring, the output shaft, and the output gear as viewed from the opposite side of fig. 5 in the axial direction. Fig. 7 is a perspective view of the motor, the transmission mechanism, and the output shaft when viewed from one side in the axial direction. Fig. 8 is a perspective view of the motor, the transmission mechanism, and the output shaft viewed from the opposite side of fig. 7 in the axial direction. Fig. 9 is a perspective view of the middle housing as viewed from one side in the axial direction. Fig. 10 is a sectional view taken along line a-a of fig. 3.
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 shown in fig. 2 is configured such that a toilet lid 201 of a toilet unit 200 is connected to the opening/closing member driving device 1 as an opening/closing member. More specifically, the toilet unit 200 has a toilet body 202, a toilet seat 203, a toilet lid 201, and a tank 204. 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 to 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.
(case and partition Member)
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. Further, the base portion 12 of the output shaft 7 is housed in the intermediate case 22.
A partition member 35 that partially partitions the inside of the case 9 is fixed to an end portion of the intermediate case 22 on the second case 23 side. The partition member 35 is made of metal and has higher rigidity than the housing 9. In this example, the partition member 35 is a sheet metal. As shown in fig. 5 and 6, the partition member 35 includes: a partition member through hole 35a through which the base portion 12 of the output shaft 7 passes in the Z-axis direction; and an annular portion 36 extending while being bent in the + Z direction from the opening edge of the partition member through hole 35 a. As shown in fig. 4, a potentiometer 37 is attached to the partition 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 housing 23 (housing portion) covers the partition member 35 from the + Z direction, and is fixed to the intermediate housing 22. The second housing 23 covers the partition member 35 from the + Z direction.
The second housing 23 includes: a plate portion 17 defining an end surface of the housing 9 in the + Z direction; and a second frame portion 24 extending in the-Z direction from the outer peripheral edge of the plate portion 17. The second frame portion 24 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 plate portion 17 includes a plate portion through hole 17a through which the output shaft 7 passes. Further, the second housing 23 includes: a shaft support part 18 protruding from the opening edge of the plate part through hole 17a of the plate part 17 in the + Z direction; and a cylindrical portion 19 protruding in the-Z direction from an opening edge of the plate portion through hole 17a of the plate portion 17. As shown in fig. 5 and 6, the plate portion through hole 17a, the shaft support portion 18, and the cylindrical portion 19 are coaxially provided. As shown in fig. 5, two slits 19a extending from one end in the first direction in the + Z direction are formed in the cylindrical portion 19. The slots 19a are provided at rotational angular positions 180 ° apart about the axis L.
The first rod-like member 39 having a cylindrical shape is inserted into each slit groove 19a in a radially movable state. The first rod member 39 is made of metal. The radial dimension of the first rod-like member 39 is longer than the radial thickness dimension of the barrel portion 19. As shown in fig. 3, a coil spring 40 (elastic member) is disposed on the outer peripheral side of the cylindrical portion 19. The coil spring 40 contacts the first rod-like member 39 from the outside of the tube 19, and projects the first rod-like member 39 from the tube 19 inward in the radial direction.
(output shaft)
The output shaft 7 penetrates the plate portion through hole 17a, the shaft support portion 18, and the tube portion 19 inside the housing 9, and protrudes outward from the housing opening 10, which is one end of the shaft support portion 18 in the + Z direction, toward the housing 9. The base portion 12 of the output shaft 7 is accommodated in the second housing 23 and the intermediate housing 22. As shown in fig. 6, the base 12 includes: a first shaft portion 41 located radially inside the cylinder portion 19; a second shaft portion 42 located closer to the-Z direction than the barrel portion 19; and a third shaft portion 43 located closer to the + Z direction than the barrel portion 19.
As shown in fig. 3, the first shaft portion 41 includes: a contact portion 45, the contact portion 45 including a circular contact surface 45a that contacts an end portion of the tube portion 19 in the-Z direction from the inner peripheral side; and a small diameter portion 46, the small diameter portion 46 having an outer diameter smaller than that of the contact portion 45 in the + Z direction of the contact portion 45. As shown in fig. 5 and 6, two protrusions 47 protruding radially outward are provided on the small-diameter portion 46. The two protrusions 47 are provided at two locations 180 ° apart around the axis L on the outer peripheral surface of the small-diameter portion 46. Each protrusion 47 includes an outer peripheral surface of a circular arc curved in the circumferential direction. Each projection 47 extends in the Z-axis direction.
As shown in fig. 6, the second shaft portion 42 includes: a large diameter portion 48 having an outer diameter larger than the contact portion 45; and a gear fixing portion 49 provided in the-Z direction of the large diameter portion 48. The large diameter portion 48 includes: a circular outer peripheral surface 48a facing radially outward; and an annular abutment surface 48b facing in the + Z direction. As shown in fig. 3, the annular abutment surface 48b abuts against the tube portion 19 from the-Z direction side. As shown in fig. 5 and 6, the gear fixing portion 49 has a smaller outer diameter than the large diameter portion 48. An output gear 63 of the transmission mechanism 8 is coaxially fixed to the gear fixing portion 49.
The third shaft portion 43 includes: a supported portion 50 including a circular outer peripheral surface facing radially outward; and a connecting portion 51 connecting the supported portion 50 and the protruding portion 11. In this example, a concave portion that is recessed inward in the radial direction is provided on the circular outer peripheral surface of the supported portion 50 at an angular position where the projection 47 is formed in the circumferential direction. As shown in fig. 3, the supported portion 50 and the connecting portion 51 are located radially inward of the shaft supporting portion 18 of the housing 9. The connecting portion 51 includes a tapered outer peripheral surface whose outer diameter decreases from the circular outer peripheral surface of the supported portion 50 toward the + Z direction.
Further, as shown in fig. 5, the end surface of the output shaft 7 in the-Z direction includes a circular recess 52 recessed in the + Z direction. As shown in fig. 3, the bottom surface of the circular recess 52 (the circular inner wall surface of the circular recess 52 in the + Z direction) is located between the large diameter portion 48 and the contact portion 45 in the Z-axis direction.
Here, in this example, the output shaft 7 is composed of the output shaft main body 55 made of resin and two second rod-like members 56 made of metal that are fixed to the output shaft main body 55 and constitute the respective protrusions 47. That is, as shown in fig. 6, the output shaft main body 55 includes the protruding portion 11, the contact portion 45, the small diameter portion 46, the large diameter portion 48, the gear fixing portion 49, the supported portion 50, and the connecting portion 51. The output shaft main body 55 includes grooves 46a extending in the Z-axis direction at two circumferential locations on the outer circumferential surface of the small-diameter portion 46. The cross section of each groove 46a is semicircular. The two second rod-like members 56 are each cylindrical in shape, and are fixed to the small diameter portion 46 with radially inner portions inserted into the respective grooves 46 a. The output shaft 7 may be a single member made of resin. That is, each protrusion 47 may be made of resin and integrally formed on the output shaft 7 so as to protrude from the small diameter portion 46.
(transfer mechanism)
As shown in fig. 7 and 8, the transmission mechanism 8 includes a worm 58, a first gear 59, a second gear 60, a third gear 61, a fourth gear 62 (front stage gear), and an output gear 63 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 58 is fixed to the outer peripheral side of the rotating shaft 27. The worm 58 and the first gear 59 are located within the first housing 21. The second gear 60, the third gear 61, the fourth gear 62, and the output gear 63 are located within the intermediate housing 22. The worm 58, the first gear 59, the second gear 60, the third gear 61, the fourth gear 62, and the output gear 63 constitute a transmission path for transmitting the driving force of the motor 6 to the output shaft 7.
The first gear 59 is located in the + X direction of the rotary shaft 27 of the motor 6. The first gear 59 includes: a first large-diameter gear 59a that meshes with the worm 58; and a first small-diameter gear 59b coaxial with the first large-diameter gear 59a and having a smaller outer diameter than the first large-diameter gear 59 a. The first large-diameter gear 59a is located in the-Z direction of the first small-diameter gear 59 b. The first gear 59 is rotatably supported by a first support shaft 65 extending in the Z-axis direction. the-Z direction end portion of the first support shaft 65 is held by the bottom wall portion 25 of the first housing 21, and the + Z direction end portion is held by the intermediate bottom portion 31 of the intermediate housing 22. As shown in fig. 3, the first gear 59 includes a torque limiter 66 that connects or disconnects transmission of the driving force between the first large-diameter gear 59a and the first small-diameter gear 59 b.
As shown in fig. 7 and 8, the second gear 60 includes: a second large-diameter gear 60a meshing with the first small-diameter gear 59 b; and a second small-diameter gear 60b coaxial with the second large-diameter gear 60a and having a smaller outer diameter than the second large-diameter gear 60 a. The second large diameter gear 60a is located in the-Z direction of the second small diameter gear 60 b. The second large-diameter gear 60a meshes with the first small-diameter gear 59b via the intermediate case opening 33 provided in the intermediate bottom portion 31 of the intermediate case 22 (see fig. 3 and 9). The second gear 60 is rotatably supported by a second support shaft 68 extending in the Z-axis direction. The end portion of the second fulcrum 68 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 partition member 35.
The third gear 61 includes: a third large-diameter gear 61a meshing with the second small-diameter gear 60 b; and a third small-diameter gear 61b coaxial with the third large-diameter gear 61a and having a smaller outer diameter than the third large-diameter gear 61 a. The third large-diameter gear 61a is located in the-Z direction of the third small-diameter gear 61 b. The third gear 61 is rotatably supported by a third support shaft 69 extending in the Z-axis direction. The end portion of the third fulcrum 69 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 fulcrum 69 penetrates the partition member 35.
The fourth gear 62 is a spur gear that meshes with the third small-diameter gear 61b and the output gear 63. The fourth gear 62 and the output gear 63 are aligned in the Y-axis direction. The fourth gear 62 is disposed coaxially with the second gear 60 and is rotatably supported by the second support shaft 68. As shown in fig. 3, the end portion in the-Z direction of the second fulcrum 68 is held by the intermediate case 22, and the end portion in the + Z direction is held by the partition member 35. That is, as shown in fig. 9, the intermediate bottom portion 31 of the intermediate case 22 includes a shaft holding portion 34 that holds a second support shaft 68 that supports the second gear 60 and the fourth gear 62. As shown in fig. 4, the partition member 35 includes a shaft holding portion 70 that holds the second support shaft 68 that supports the second gear 60 and the fourth gear 62.
The output gear 63 is made of metal. The output gear 63 is coaxially fixed to the gear fixing portion 49 of the output shaft 7. That is, as shown in fig. 5 and 6, the output gear 63 is annular, and the gear fixing portion 49 of the output shaft 7 is inserted into the central hole thereof. A plurality of recesses 71 are circumferentially provided on the inner peripheral surface of the output gear 63, and a plurality of protrusions 72 that fit into the recesses 71 on the inner peripheral surface of the output gear 63 are provided on the outer peripheral surface of the gear fixing portion 49 of the output shaft 7. Thereby, the output gear 63 and the output shaft 7 are coaxially connected in a state of being incapable of relative rotation about the axis L.
(output shaft support structure)
As shown in fig. 3 and 9, the output shaft 7 is rotatably supported by a support portion 81 projecting in the + Z direction from the intermediate bottom portion 31 of the intermediate case 22. The support portion 81 is provided coaxially with the case opening 10 of the second case 23. The front end portion of the support column portion 81 is inserted into the circular recess 52 of the output shaft 7. The distal end of the support column 81 contacts the bottom surface of the circular recess 52 (the circular inner wall surface in the + Z direction of the circular recess 52).
As shown in fig. 3, the large diameter portion 48 of the output shaft 7 is rotatably supported by the annular portion 36 of the partition member 35. That is, the end side portion of the annular portion 36 in the-Z direction includes a bearing portion 36a that contacts the base 12 from the outer peripheral side. The bearing portion 36a supports the output shaft 7 to be rotatable. The + Z-direction one end 81a of the pillar portion 81 overlaps with the bearing portion 36a when viewed from the direction orthogonal to the axis L. The supported portion 50 of the output shaft 7 is rotatably supported from the outer peripheral side by the shaft support portion 18 of the second housing 23.
When the large diameter portion 48 is rotatably supported by the annular portion 36 of the partition member 35 and the supported portion 50 is rotatably supported by the shaft support portion 18 of the second housing 23, the load generation mechanism 73 is configured between the large diameter portion 48 and the supported portion 50 on the outer side of the output shaft 7 in the Z-axis direction. As shown in fig. 10, the load generating mechanism 73 includes: a first rod-like member 39 inserted into the notch 19a of the barrel 19; a coil spring 40; and a second rod-like member 56 (protrusion 47) that protrudes radially outward from the small diameter portion 46 of the base 12. In the load generating mechanism 73, when the output shaft 7 passes through a predetermined rotational angle position, the second rod member 56 moves the first rod member 39 radially outward against the biasing force of the coil spring 40. Therefore, when the output shaft 7 passes through a predetermined rotational angular position around the axis L, a load corresponding to the biasing force of the coil spring 40 is applied to the output shaft 7.
Here, as shown in fig. 3, the annular portion 36 of the partition member 35 includes a cylinder holding portion 36b that holds an end portion of the cylinder 19 in the-Z direction from the outer peripheral side on the + Z direction side of the bearing portion 36 a. That is, the annular portion 36 includes, from the-Z direction side toward the + Z direction: a bearing portion 36a that rotatably supports the large diameter portion 48 of the output shaft 7; and a cylindrical portion holding portion 36b that holds the cylindrical portion 19 of the housing 9.
Further, the radial separation distance between the circular contact surface 45a of the contact portion 45 in the base portion 12 and the circular outer peripheral surface 48a of the large diameter portion 48 is the same as the radial thickness dimension of the cylinder portion 19. Therefore, the inner peripheral surface of the cylinder portion holding portion 36b that contacts the cylinder portion 19 and the inner peripheral surface of the bearing portion 36a that contacts the large diameter portion 48 of the output shaft 7 in the annular portion 36 are continuous without a step in the Z-axis direction.
(fixing Structure of partition Member)
Next, the partition member 35 is fixed to the intermediate housing 22 between the annular portion 36 and the shaft holding portion 70 in the Y-axis direction.
That is, as shown in fig. 9, in the intermediate frame portion 32, the intermediate case 22 includes a first protrusion 83 and a second protrusion 84 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 83 and the second projection 84 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 83 is provided. The second frame portion 32b includes a rectangular second notch portion 32d at a position where the second protrusion 84 is provided. The second frame portion 32b is a portion constituting a part of the second side wall 14 of the housing. The first protrusion 83 and the second protrusion 84 are opposed in the X-axis direction.
On the other hand, as shown in fig. 4, the partition member 35 includes a pair of protruding portions 35b, 35c protruding to both sides in the X-axis direction between the annular portion 36 and the shaft holding portion 70 in the Y-axis direction. The protruding portions 35b and 35c are provided with through grooves. In the partition 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 protrusion 83. In the partition 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 84. The partition member 35 is fixed to the intermediate case 22 by a screw (not shown) that passes through the second case 23 and the through groove of the protruding portion 35b and is screwed into the screw hole of the first protrusion 83. The partition member 35 is fixed to the intermediate case 22 by a screw 75 that penetrates the second case 23 and the through groove of the protruding portion 35c and is screwed into the screw hole of the second protrusion 84.
In a state where the partition member 35 is fixed to the intermediate case 22, a gap 86 is partially provided between the partition member 35 and the first frame portion 32a, and a gap 87 is partially provided between the partition member 35 and the second frame portion 32 b. That is, in a state where the partition member 35 is fixed to the housing 9, a portion (gap 86) that does not contact each other is provided between the partition member 35 and the first side wall 13. Further, a portion (gap 87) which does not contact each other is provided between the partition member 35 and the second side wall 14.
(potentiometer)
As shown in fig. 7, the potentiometer 37 includes a potential gear 91 that meshes with any one of a plurality of gears constituting the transmission mechanism 8. The potentiometer 37 includes a detection unit 92 that detects the rotational angle position of the potential gear 91. The potential gear 91 is located in the-Z direction of the partition member 35 and meshes with the third small-diameter gear 61b of the third gear 61. The detection portion 92 is fixed to the partition member 35 via a substrate 93. Here, a wiring (not shown) for supplying electric power to the motor 6 is connected between the substrate 93 and the pair of motor terminals 29. A plurality of terminal pins 96 connected to the wiring and the potentiometer 37 are fixed to the substrate 93. As shown in fig. 9, the intermediate housing 22 includes a terminal pin holding portion 97 that holds the terminal pin 96 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 96, 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 the closing direction a toward the closed position or in the 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.
Here, the transmission mechanism 8 includes a torque limiter 66 at the first gear 59. 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 66 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.
Further, the opening-closing member driving device 1 includes a load generating mechanism 73. In the load generating mechanism 73, when the output shaft 7 passes through a predetermined rotational angle position, the second rod-like member 56 (the protrusion 47) protruding from the output shaft 7 toward the outer circumferential side moves the first rod-like member 39 toward the outer radial side against the biasing force of the coil spring 40. Therefore, when the torque applied to the output shaft 7 from the outside is smaller than the biasing force of the coil spring 40, the load generating mechanism 73 can hold the output shaft 7 in a state of being stopped at a predetermined rotational angle position. In this example, the predetermined rotational angular position is set to a rotational angular position slightly shifted toward the closed position side from the position where the toilet lid 201 stands vertically. Further, the biasing force of the coil spring 40 is set to be larger than the torque for rotating the toilet lid 201 toward the closed position by the self weight of the toilet lid 201 after the toilet lid 201 is vertically raised. Therefore, in the opening/closing member driving device 1, even when the toilet lid 201 is inclined in the closing direction a by its own weight after standing upright, the toilet lid 201 is prevented from naturally returning to the closed position.
(effective effect)
In this example, the load generating mechanism 73 includes: a first rod-like member 39 inserted into a notch 19a formed in the tube 19 of the housing located on the outer peripheral side of the output shaft 7; a coil spring 40 that contacts the first rod-like member 39 from the outside of the cylindrical portion 19 and projects the first rod-like member 39 from the cylindrical portion 19 to the inside in the radial direction; and a projection 47, the projection 47 projecting radially outward from the first shaft portion 41 of the output shaft 7 located radially inward of the cylindrical portion 19. Therefore, the load generating mechanism 73 is provided outside the output shaft 7. Therefore, as compared with the case where the output shaft 7 is formed with a recess and the load generating mechanism 73 is provided inside, a decrease in the rigidity of the output shaft 7 can be suppressed. Therefore, deformation of the output shaft 7 can be prevented or suppressed.
Here, when the output shaft 7 passes through a predetermined rotational angle position, the projection 47 moves in the circumferential direction around the axis. Therefore, when the protrusion 47 moves the first rod-like member 39 radially outward, the protrusion 47 presses the first rod-like member 39 to one side in the circumferential direction. Therefore, as shown in fig. 10, the first rod-like member 39 pressed by the protrusion 47 comes into contact with the inner wall of the notch 19a on one side in the circumferential direction, and exerts a force F that expands the notch 19 a. When the slit 19a is expanded by the force F, the cylindrical portion 19 is deformed or broken. In view of the above, the partition member 35 fixed in the housing 9 includes the annular portion 36, and the annular portion 36 holds the end portion in the-Z direction of the cylindrical portion 19 where the cutout groove 19a is opened from the outer peripheral side. Therefore, the deformation or breakage of the tube 19 can be prevented or suppressed.
Further, in this example, the partition member 35 is higher in rigidity than the housing 9. Therefore, the cylindrical portion 19 provided in the housing 9 is easily prevented from being deformed.
Further, the first shaft portion 41 of the output shaft 7 includes: a contact portion 45, the contact portion 45 including a circular contact surface 45a that contacts an end portion of the tube portion 19 in the-Z direction from an inner peripheral side of the tube portion 19; and a small diameter portion 46, the small diameter portion 46 having an outer diameter smaller than the contact portion 45 in the + Z direction of the contact portion 45. The projection 47 is provided on the small diameter portion 46. Therefore, the contact portion 45 of the output shaft 7 and the annular portion 36 of the partition member 35 can hold the radially-interposed state of the end portion of the cylindrical portion 19 in the-Z direction, in which the notch 19a is formed. Therefore, the deformation of the tube 19 is easily suppressed.
The case 9 is made of resin, and the partition member 35 is made of metal. Therefore, the rigidity of the partition member 35 can be made higher than the rigidity of the housing 9. Further, the second shaft portion 42 includes: a large diameter portion 48 having an outer diameter larger than the contact portion 45; and a gear fixing portion 49 to which an output gear of the transmission mechanism is fixed in the-Z direction of the large diameter portion 48. The large diameter portion 48 includes: a circular outer peripheral surface 48a facing radially outward; and an annular abutting surface 48b that abuts against the tube portion 19 from the-Z direction side. The ring portion 36 includes, from the-Z direction side toward the + Z direction: a bearing portion 36a that rotatably supports the large diameter portion 48; and a tube holding portion 36b holding the tube 19. Further, the thickness dimension in the radial direction of the cylindrical portion 19 is shorter than the dimension in the radial direction of the first rod-like member 39, and the radial separation distance of the circular contact surface 45a from the circular outer peripheral surface 48a is the same as the thickness dimension in the radial direction of the cylindrical portion 19, so that the inner peripheral surface of the cylindrical portion holding portion 36b and the inner peripheral surface of the bearing portion 36a are continuous in the Z-axis direction without a step. Therefore, the metal partition member 35 can be bent by burring or the like to provide the annular portion including the tube portion holding portion 36b and the bearing portion 36 a.
An end surface of the output shaft 7 in the-Z direction includes a circular recess 52 recessed in the + Z direction, and the housing 9 includes a support portion 81, and the support portion 81 is inserted into the circular recess 52 and rotatably supports the output shaft 7. Further, the pillar portion 81 and the bearing portion 36a overlap when viewed from the direction orthogonal to the axis L. Therefore, the output shaft 7 can be prevented or suppressed from tilting.
Further, the output shaft 7 includes: a resin output shaft main body 55; and a second rod-like member 56 fixed to the output shaft main body 55 and forming the projection 47. The first rod member 39 and the second rod member 56 are made of metal. Therefore, when the output shaft 7 passes through a predetermined rotational angle position, the projection 47 and the first rod member 39 can be prevented or suppressed from contacting and wearing.
In this example, the output gear 63 and the fourth gear 62 are aligned in the Y axis direction, and the partition member 35 is fixed to the housing 9 between the annular portion 36 and the shaft holding portion 70 in the Y axis direction. That is, the pair of protruding portions 35b, 35c of the partition member 35 located between the annular portion 36 and the shaft holding portion 70 in the Y-axis direction is fixed to the housing 9. Thereby, the partition member 35 is fixed to the housing 9 at a position close to the output gear 63. Therefore, the partition member 35 can be prevented from flexing when a load is applied to the output gear 63 via the output shaft 7.
Further, the housing 9 includes a first wall portion and a second wall portion 14 which are aligned in the X-axis direction and extend in parallel in the Y-axis direction. The partition member 35 is disposed between the first side wall 13 and the second side wall 14, a gap 86 is partially provided between the partition member 35 and the first side wall 13, and a gap 87 is partially provided between the partition member 35 and the second side wall 14. In this way, the partition member 35 and the housing 9 include portions that do not contact each other, and therefore, the load applied to the partition member 35 from the output gear 63 via the output shaft 7 can be suppressed from propagating to the housing 9.
Here, since the toilet lid opening/closing unit 3 of the present embodiment includes the load generating mechanism 73, the toilet lid 201 can be held at a predetermined rotational angle position. Further, the load generating mechanism 73 is provided outside the output shaft 7 and not inside the recess provided in the output shaft 7, and therefore deformation of the output shaft 7 can be prevented or suppressed.
Claims (8)
1. An opening/closing member driving device 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;
a partition member fixed to an inner side of the case and partitioning the inner side of the case; and
a load generating mechanism that applies a load to the output shaft when the output shaft passes through a predetermined rotational angle position,
when a direction along an axis of the output shaft is an axial direction, a direction orthogonal to the axis is a radial direction, one side of the axial direction is a first direction, and the other side is a second direction, the output shaft includes: a base located within the housing; and a protrusion protruding from the housing in the second direction of the base,
the housing includes a housing portion covering the partition member from the second direction side,
the housing portion includes: an opening through which the output shaft passes from the inside of the housing to the outside; and a cylindrical portion extending coaxially with the opening portion on the inner side of the housing,
the base includes: a first shaft portion located radially inward of the cylindrical portion; and a second shaft portion located closer to the first direction than the cylinder portion,
the cylinder portion includes a cutout groove extending in the axial direction from one end in the first direction,
the load generating mechanism includes: a rod-shaped member inserted into the slit groove in a state of being movable in the radial direction; an elastic member that contacts the rod-shaped member from the outside of the tube portion and protrudes the rod-shaped member from the tube portion to the inside in the radial direction; and a protrusion protruding radially outward from the first shaft portion,
the partition member includes: a through hole for the base to pass through; and an annular portion extending in the axial direction from an opening edge of the through hole and holding an end portion of the cylindrical portion in the first direction from an outer peripheral side,
when the output shaft passes through the predetermined rotational angle position, the protrusion moves the rod-like member radially outward against the urging force of the elastic member.
2. The opening-closing member driving device according to claim 1,
the partition member has higher rigidity than the housing.
3. The opening-closing member driving device according to claim 1 or 2,
the first shaft portion includes: a contact portion including a circular contact surface that contacts an end portion of the cylindrical portion in the first direction from an inner circumferential side of the cylindrical portion; and a small diameter portion having an outer diameter smaller than that of the contact portion in the second direction of the contact portion,
the projection is provided on the small diameter portion.
4. The opening-closing member driving device according to claim 3,
the second shaft portion includes: a large diameter portion having an outer diameter larger than the contact portion; and a gear fixing portion to which an output gear of the transmission mechanism is fixed in the first direction of the large diameter portion,
the large diameter portion includes: a circular outer peripheral surface facing radially outward; and an annular abutting surface abutting on the cylinder part from one side of the first direction,
the annular portion includes, from the first direction side toward the second direction: a bearing portion that supports the large diameter portion to be rotatable; and a cylinder holding portion for holding the cylinder.
5. The opening-closing member driving device according to claim 4,
the housing is made of a resin and is formed of a resin,
the partition member is made of a metal and is provided with a partition wall,
a thickness dimension in a radial direction of the cylindrical portion is shorter than the dimension in the radial direction of the rod-like member,
the radial distance between the circular contact surface and the circular outer peripheral surface is equal to the radial thickness of the cylindrical portion,
an inner peripheral surface of the cylinder portion holding portion and an inner peripheral surface of the bearing portion are continuous in the axial direction without a step.
6. The opening-closing member driving device according to claim 4 or 5,
an end surface of the output shaft in the first direction includes a circular recess recessed in the second direction,
the housing includes a support column part inserted into the circular recess part and supporting the output shaft to be rotatable,
the pillar portion and the bearing portion overlap when viewed from a direction orthogonal to the axis.
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 second rod-like member fixed to the output shaft main body and forming the projection,
the second rod member and the rod member are made of metal.
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 |
|---|---|---|---|
| JP2019-205221 | 2019-11-13 | ||
| JP2019205221A JP7309573B2 (en) | 2019-11-13 | 2019-11-13 | Opening/closing member driving device and toilet lid opening/closing unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112790654A true CN112790654A (en) | 2021-05-14 |
| CN112790654B CN112790654B (en) | 2022-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011270076.8A Active CN112790654B (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) | JP7309573B2 (en) |
| CN (1) | CN112790654B (en) |
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| CN208211961U (en) * | 2017-07-31 | 2018-12-11 | 厦门瑞尔特卫浴科技股份有限公司 | A kind of slow drop positioner of water-closet bowl cover plate |
| CN208491950U (en) * | 2017-08-25 | 2019-02-15 | 厦门瑞尔特卫浴科技股份有限公司 | A kind of damping mechanism with temporary limit function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| JP2017089323A (en) | 2015-11-16 | 2017-05-25 | 日本電産サンキョー株式会社 | Automatic closing device and automatic closing device unit |
| JP2018119644A (en) | 2017-01-27 | 2018-08-02 | アイシン精機株式会社 | Electric turning device |
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|---|---|---|---|---|
| GB9526491D0 (en) * | 1994-12-27 | 1996-02-21 | Tok Bearing Co Ltd | Rotary damper with self-standing mechanism |
| US20050072639A1 (en) * | 2003-10-06 | 2005-04-07 | Tok Bearing Co., Ltd. | Rotating damper |
| WO2007072775A1 (en) * | 2005-12-22 | 2007-06-28 | Ntn Corporation | Fluid bearing device |
| JP2009005813A (en) * | 2007-06-27 | 2009-01-15 | Aisin Seiki Co Ltd | Autonomous holding mechanism of toilet seat |
| JP2012202498A (en) * | 2011-03-25 | 2012-10-22 | Nidec Sankyo Corp | Damper device |
| CN204120930U (en) * | 2013-09-25 | 2015-01-28 | 日本电产三协株式会社 | Electric opening and closing device |
| CN205123496U (en) * | 2014-11-21 | 2016-03-30 | 日本电产三协株式会社 | Gear motor and pointer display device |
| CN107196450A (en) * | 2017-07-04 | 2017-09-22 | 江苏派迪车辆技术有限公司 | A kind of wheel hub motor |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN112790654B (en) | 2022-07-08 |
| JP7309573B2 (en) | 2023-07-18 |
| JP2021078307A (en) | 2021-05-20 |
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