JP2017155759A - Rotation transmission mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotation transmitting mechanism capable of performing rotation transmission between a first member and a second member arranged coaxially in a narrow space.SOLUTION: A rotation transmission mechanism 5 of a motor device 100 transmits the rotation around an axis L between the driving member 4 and the driven member 7 arranged coaxially with the driving member 4. The driving member 4 includes a first protrusion part 45 which protrudes to one side in the axis L direction at a position spaced apart from the axis L in the radial direction. In the driven member 7, the first protrusion part 45 is provided from the one side CW around the axis L and a first flat part 751 capable of contacting is provided toward the other side CCW around the axis L. In the first protrusion part 45, the first end surface 451, which is the end surface of the one side CW around the axis L when viewed from the axis L direction, is a convex surface.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a rotation transmission mechanism that transmits rotation between a first member and a second member arranged coaxially.

  In transmitting the rotation of the drive member to the driven member, it has been proposed to connect the drive member and the driven member via a coupling member (see, for example, Patent Document 1).

JP 2003-194085 A

  However, in the configuration in which the coupling member is provided between the driving member and the driven member as in the configuration described in Patent Document 1, the number of parts increases and a useless space is provided between the driving member and the driven member. There is a problem that it occurs.

  In view of the above problems, an object of the present invention is to provide a rotation transmission mechanism capable of performing rotation transmission between a first member and a second member arranged coaxially in a narrow space. is there.

  In order to solve the above problems, the present invention provides a rotation transmission mechanism for transmitting rotation around an axis line between a first member and a second member arranged coaxially with the first member, 1 member is provided with the 1st convex part which protruded to the one side of the said axial direction in the position spaced apart from the said axis line in the radial direction, and the said 1st convex part is provided in the said 2nd member from the one side around the said axis line. A first flat portion capable of abutting is provided toward the other side around the axis.

  In this invention, when the 1st member rotates to one side around an axis, the 1st convex part provided in the 1st member contacts the 2nd member, and the 2nd member rotates to one side around the axis. On the contrary, when the second member rotates around the axis to the other side, the second member contacts the first convex portion of the first member, and the first member rotates around the axis to the other side. For this reason, since a coupling member is not used, a rotation transmission mechanism can be provided in a narrow space.

  In the present invention, the first convex portion may adopt a mode in which a first end surface which is the one end surface around the axis is a convex curved surface when viewed from the axial direction. According to this aspect, even if a slight inclination occurs in the first member or the second member, it is possible to suppress an extra load from being generated between the first convex portion and the first flat portion.

In the present invention, the second member may be provided with a second flat portion on which the first convex portion can contact from the other side around the axis toward the one side around the axis. Can be adopted. According to this aspect, when the first member rotates around the axis to the other side, the first convex portion provided on the first member contacts the second member, and the second member rotates around the axis toward the other side. To do. On the contrary, when the second member rotates to one side around the axis, the second member contacts the first convex portion of the first member, and the first member rotates to one side around the axis. In this case, the portion where the first convex portion abuts is the second flat portion facing the other side around the axis line in the second member. Therefore, the first member can be configured to transmit rotation in both directions. Even if a slight misalignment occurs between the second member and the second member, it is possible to suppress the occurrence of an extra load. Therefore, since high accuracy is not required for assembly, assembly of the rotation transmission mechanism and the like is easy.

  In the present invention, the first convex portion may employ a mode in which a second end surface that is the other end surface around the axis is a convex curved surface when viewed from the axial direction. According to this aspect, even if a slight inclination occurs in the first member or the second member, it is possible to suppress an extra load from being generated between the first convex portion and the second flat portion.

  In this invention, the said 1st convex part can employ | adopt the aspect currently formed in the circular arc shape extended around the said axis line when it sees from the said axial direction. According to this aspect, since the strength of the first convex portion is large, a large torque can be transmitted.

  In the present invention, the second member includes a convex portion that protrudes toward the other side in the axial direction with a fan shape when viewed from the axial direction, and the first flat portion is formed around the axial line of the convex portion. A mode provided on the other side surface can be employed. According to this aspect, since the strength of the portion where the first flat portion is provided is large, a large torque can be transmitted.

  In the present invention, the first member projects from the other side around the axis to the one side in the axial direction at a position spaced radially from the axis with respect to the first convex. The second member is provided with a second flat portion on which the second convex portion can come into contact with the other side around the axis toward the one side around the axis. can do. According to this aspect, when the first member rotates around the axis to the other side, the second convex portion provided on the first member contacts the second member, and the second member rotates around the axis toward the other side. To do. On the contrary, when the second member rotates to one side around the axis, the second member contacts the second convex portion of the first member, and the second member rotates to one side around the axis. At this time, the portion where the second convex portion abuts is the second flat portion facing the other side around the axis line in the second member. Even if a slight misalignment occurs between the second member and the second member, it is possible to suppress the occurrence of an extra load. Therefore, since high accuracy is not required for assembly, assembly of the rotation transmission mechanism and the like is easy.

  In the present invention, the second convex portion may adopt a mode in which a second end surface that is the other end surface around the axis is a convex curved surface when viewed from the axial direction. According to this aspect, even if a slight inclination occurs in the first member or the second member, it is possible to suppress an extra load from being generated between the second convex portion and the second flat portion.

  In the present invention, it is possible to adopt an aspect in which the first member is a driving member to which rotation from a driving source is transmitted, and the second member is a driven member that follows the first member.

  In the present invention, when rotation of only one side around the axis is transmitted, one of the first member and the second member is a drive member to which rotation from a drive source is transmitted, and the other The member is a driven member that follows the first member, and the driven member is provided with a biasing member that biases the driven member toward the other side around the axis. It is preferable to do. According to such a configuration, since the first convex portion and the first flat portion are always in contact with each other, the driven member starts to rotate quickly when the driving member starts to rotate. In this case, it is possible to adopt an aspect in which the first member is the driving member and the second member is the driven member.

In this invention, when the 1st member rotates to one side around an axis, the 1st convex part provided in the 1st member contacts the 2nd member, and the 2nd member rotates to one side around the axis. On the contrary, when the second member rotates around the axis to the other side, the second member contacts the first convex portion of the first member, and the first member rotates around the axis to the other side. For this reason, since the assembly coupling member is not used, the rotation transmission mechanism can be provided in a narrow space.

It is the perspective view which looked at the inside of the motor device concerning Embodiment 1 of the present invention from one side. It is the perspective view which looked at the inside of the motor apparatus shown in FIG. 1 from the other side. FIG. 2 is an exploded perspective view when a driven member and a sensor mechanism are separated from the motor device shown in FIG. 1. It is explanatory drawing of the member which comprises the rotation transmission mechanism of the motor apparatus shown in FIG. It is explanatory drawing of the rotation transmission mechanism of the motor apparatus shown in FIG. It is sectional drawing of the rotation transmission mechanism provided in the motor apparatus which concerns on Embodiment 2 of this invention. It is sectional drawing of the rotation transmission mechanism provided in the motor apparatus which concerns on Embodiment 3 of this invention. It is sectional drawing of the rotation transmission mechanism provided in the motor apparatus which concerns on Embodiment 4 of this invention.

  A motor apparatus to which the present invention is applied will be described with reference to the drawings. In the following description, Lm is given to the axis of the motor 1, and in the direction of the motor axis Lm in which the motor axis Lm extends, the side where the rotary shaft 12 protrudes toward the gear train 3 is defined as the output side Lma. The opposite side will be described as the non-output side Lmb. Further, the central axis of the drive member 4 and the driven member 7 is an axis L, La is attached to one side in the axis L direction in which the axis L extends, Lb is attached to the other side in the axis L direction, and the axis In the description, CW is attached to one side around L and CCW is attached to the other side around the axis L.

[Embodiment 1]
(Configuration of motor device 100)
FIG. 1 is a perspective view of the inside of a motor device 100 according to Embodiment 1 of the present invention as viewed from one side. FIG. 2 is a perspective view of the inside of the motor device 100 shown in FIG. 1 as viewed from the other side. FIG. 3 is an exploded perspective view when the driven member 7 and the sensor mechanism 6 are separated from the motor apparatus 100 shown in FIG. 1.

  A motor device 100 shown in FIGS. 1, 2 and 3 is a device for switching the posture of a member such as an opening / closing member, and a motor 1 as a drive source and a drive in a housing (not shown). It has a gear train 3 including a member 4 and a driven member 7 as an output member. The motor 1 is a stepping motor 1a, and includes a rotor 10 having a permanent magnet (not shown) fixed to the outer peripheral surface of the rotating shaft 12, and a cylindrical stator 20 that covers the outer peripheral surface of the permanent magnet. Yes. N poles and S poles are alternately arranged in the circumferential direction on the outer peripheral surface of the permanent magnet. The stator 20 has a pair of stator sets 21 and 22 arranged so as to overlap in the direction of the motor axis Lm. The frame 9 is fixed to the end face of the output side Lma among the both end faces of the stator 20. The frame 9 includes a first plate portion 91 fixed to the end surface of the stator 20, a second plate portion (not shown) facing the first plate portion 91 on the output side Lma, the first plate portion 91, and the second plate. A third plate portion 93 that connects the first and second portions, and the distal end portion of the output side Lma of the rotary shaft 12 is rotatably supported by a shaft hole (not shown) formed in the second plate portion. . A cylindrical member 18 formed with a worm is fixed to the outer peripheral surface of the rotating shaft 12.

(Configuration of gear train 3)
The gear train 3 includes a first gear 31, a second gear 32, a third gear 33, a fourth gear 34, a fifth gear 35, and a driving member 4 as a sixth gear. The first gear 31 is rotatably supported on the support shaft 310, the second gear 32 is rotatably supported on the support shaft 320, the third gear 33 is rotatably supported on the support shaft 330, and the fourth gear 34 is The fifth gear 35 is rotatably supported on the support shaft 350 while being supported rotatably on the support shaft 340. The support shafts 310, 320, 330, 340, and 350 are supported by housing (not shown). The drive member 4 and the driven member 7 are supported by a housing or the like so as to be rotatable around the axis L.

  The first gear 31 includes a worm wheel 311 that meshes with the worm of the tubular member 18, and a gear 312 that is integral with the worm wheel 311, and the gear 312 has a smaller diameter than the worm wheel 311. The second gear 32 includes a gear 321 that meshes with the gear 312 and a gear 322 that is integral with the gear 321. The gear 321 has a larger diameter than the gear 322 and a larger diameter than the gear 312. The third gear 33 meshes with the gear 322 and has a larger diameter than the gear 322. The fourth gear 34 includes a gear 341 that meshes with the third gear 33, and a gear 342 that is integral with the gear 341. The gear 341 has a larger diameter than the third gear 33 and a larger diameter than the gear 342. The fifth gear 35 has a cylindrical portion 351 and a sector gear 352 that protrudes radially outward from the cylindrical portion 351, and the sector gear 352 meshes with the gear 342. The radius of curvature of the sector gear 352 is larger than the radius of the gear 342. In addition, a shaft hole 358 into which the support shaft 350 is fitted is formed in the cylinder portion 351.

  In the fifth gear 35, a gear 353 is formed coaxially with the cylindrical portion 351, and the gear 353 meshes with the gear 42 of the drive member 4. Therefore, the rotation of the motor 1 is transmitted to the drive member 4 via the gear train 3, and the drive member 4 rotates around the axis L. Further, the rotation of the driving member 4 is transmitted to the driven member 7 arranged coaxially with the driving member 4 via the rotation transmission mechanism 5 described later, and as a result, the driven member 7 rotates around the axis L.

(Configuration of sensor mechanism 6)
As shown in FIG. 3, the motor device 100 is provided with a sensor mechanism 6 that detects the rotation of the rotor 10. In this embodiment, the sensor mechanism 6 includes a magnet 61 that rotates integrally with the rotor 10 and a magnetic sensor element 62 that faces the magnet 61. In this embodiment, the magnet 61 is held by a rotating plate 63 connected to the end of the rotating shaft 12 on the counter-output side Lmb side. In this embodiment, the magnet 61 is held inside a magnet holding hole 631 provided at one place in the circumferential direction on the output side Lma surface of the rotating plate 63. Therefore, the magnet 61 is provided at one place in the circumferential direction. The magnetic sensor element 62 is held on the motor substrate 25, and faces the magnet 61 on the outer side in the radial direction when the rotor 10 rotates and the magnet 61 passes in the vicinity of the magnetic sensor element 62. Therefore, according to the sensor mechanism 6, the angular position and the rotation speed of the rotor 10 can be detected. In this embodiment, the magnetic sensor element 62 is a Hall element. A connector 29 is held on the motor board 25.

(Configuration of rotation transmission mechanism 5)
FIG. 4 is an explanatory view of members constituting the rotation transmission mechanism 5 of the motor device 100 shown in FIG. 1, and FIGS. 4A and 4B are perspective views of the drive member 4 constituting the rotation transmission mechanism 5. 4 is a perspective view of a driven member 7 constituting the rotation transmission mechanism 5. FIG. 5 is an explanatory diagram of the rotation transmission mechanism 5 of the motor device 100 shown in FIG. 1. FIGS. 5A and 5B are side views of the rotation transmission mechanism 5 and AA of the rotation transmission mechanism 5. It is a sectional view.

In the motor device 100, a rotation transmission mechanism 5 shown in FIGS. 4 and 5 is configured between the driving member 4 and the driven member 7, and the rotation transmission mechanism 5 is one of the axes around the axis L of the driving member 4. The rotation to the side CW is transmitted to the driven member 7, and the driven member 7 is rotated to one side CW around the axis L. In this embodiment, the driven member 7 is provided between the driven member 7 and a housing (not shown).
An urging member 8 is provided to urge toward the other side CCW around the axis L. The urging member 8 includes, for example, a torsion coil spring having one end held by the driven member 7 and the other end held by a housing or the like. In FIG. 4 and the like, the biasing member 8 is indicated by an arrow.

  In this embodiment, the drive member 4 includes a first disk portion 41, a gear 42 protruding from the first disk portion 41 to the other side Lb in the axis L direction, and one side in the axis L direction with respect to the first disk portion 41. The second disk portion 43 provided in La is formed coaxially. The second disk part 43 has a smaller diameter than the first disk part 41. The drive member 4 is configured as a first member having a first convex portion 45 that protrudes from the end face 44 of the second disc portion 43 to one side La in the axis L direction. In the present embodiment, the first convex portion 45 is provided in an arc shape at a position separated from the axis L in the radial direction. In the present embodiment, the first convex portion 45 is formed over an angle range of about 90 °. Here, the first end surface 451 that is the end surface on one side CW around the axis L of the first convex portion 45 is a convex curved surface when viewed from the direction of the axis L. On the other hand, the second end surface 452 that is the end surface of the other side CCW around the axis L of the first convex portion 45 is a flat surface when viewed from the direction of the axis L.

  The driven member 7 is a second member in which a first flat portion 751 on which the first end surface 451 of the first convex portion 45 can come into contact with one side CW around the axis L is provided toward the other side CCW around the axis L. It has become. In this embodiment, the driven member 7 includes a shaft portion 71 having a circular cross section and a convex portion 73 protruding from the end surface 72 on the other side Lb in the axis L direction of the shaft portion 71 to the one side La in the axis L direction. Yes. The convex portion 73 is a sector having an arc angle of about 180 ° when viewed from the direction of the axis L, and has a side surface 75 that linearly connects both ends of the arc surface 74. In the driven member 7 having such a configuration, a portion corresponding to the end surface 72 is a recessed portion 720 that is recessed when viewed from the protruding portion 73. Accordingly, when the driving member 4 and the driven member 7 are arranged at predetermined positions in the direction of the axis L so that the end surface 44 of the driving member 4 and the end surface 72 of the driven member 7 face each other, the first convex portion is formed in a portion corresponding to the concave portion 720. Part 45 is located. In this state, when viewed from the direction orthogonal to the axis L, the first convex portion 45 overlaps the side surface 75 of the convex portion 73. Accordingly, as shown by hatching in FIG. 4B, the first end surface 451 of the first convex portion 45 is rotated around the axis L by the portion of the side surface 75 facing the other side CCW around the axis L. The 1st flat part 751 which can be contact | abutted from one side CW of this is comprised.

  In this embodiment, the end surface 44 of the driving member 4 and the convex portion 73 of the driven member 7 are separated in the axis L direction, and the end surface 72 of the driven member 7 and the first convex portion 45 of the driving member 4 are in the axis L direction. It is separated by. That is, the driving member 4 and the driven member 7 are in contact only at the first convex portion 45 and the first flat portion 751.

(Operation in the motor device 100)
In the motor device 100 configured as described above, when the motor 1 rotates forward, the rotation of the motor 1 is transmitted to the drive member 4 via the gear train 3. For this reason, in the rotation transmission mechanism 5, the driving member 4 rotates to the one side CW around the axis L, and the first end surface 451 of the first convex portion 45 of the driving member 4 moves from the one side CW around the axis L to the driven member 7. The first flat portion 751 is pressed. As a result, the driven member 7 rotates to the one side CW around the axis L against the urging force of the urging member 8, and stops at a predetermined angular position by stopping the motor 1. This state is maintained by a load between the tubular member 18 worm and the worm wheel 311.

  On the other hand, when the driven member 7 is returned to the original position, the motor 1 rotates in the reverse direction. As a result, the drive member 4 rotates around the axis L to the other side CCW. Even in this case, since the driven member 7 is urged toward the other side CCW around the axis L by the urging force of the urging member 8, the first end surface 451 of the first convex portion 45 of the drive member 4 and the driven member 7 are also urged. The state where the first flat portion 751 is in contact is always maintained.

(Main effects of this form)
As described above, in the rotation transmission mechanism 5 of the motor device 100 according to the present embodiment, the drive member 4 has the first convex portion 45 protruding to the one side La in the axis L direction at a position spaced from the axis L in the radial direction. The driven member 7 is configured as a second member in which a first flat portion 751 with which the first convex portion 45 can abut from one side CW around the axis L is formed. For this reason, when the driving member 4 (first member) rotates around the axis L to the one side CW, the first convex portion 45 provided on the driving member 4 abuts on the driven member 7, and the driven member 7 moves to the axis L. Rotate around one side CW. At that time, the portion of the driven member 7 where the first convex portion 45 of the driving member 4 abuts is the first flat portion 751 facing the other side CCW around the axis L. For this reason, even if some position shift generate | occur | produces between the drive member 4 and the driven member 7, it can suppress that extra load generate | occur | produces. Therefore, since high accuracy is not required for assembly, the assembly of the rotation transmission mechanism 5 and the like is easy.

  Further, in the drive member 4, the first convex portion 45 is formed in an angle range of about 90 °, whereas in the driven member 7, the convex portion 73 has a sector shape with an arc angle of 180 °, and the concave portion 720 is about It exists in the angle range of 180 °. Therefore, since it is easy to arrange the first convex portion 45 inside the concave portion 720, the assembly of the rotation transmission mechanism 5 and the like is easy. Further, since no coupling member is used, the rotation transmission mechanism 5 can be provided in a narrow space.

  Further, since the first end surface 451 on one side CW around the axis L of the first convex portion 45 provided on the driving member 4 is a convex curved surface, the driving member 4 or the driven member 7 is slightly inclined. In addition, it is possible to suppress an excessive load from being generated between the first convex portion 45 and the first flat portion 751.

  Further, the end surface 44 of the driving member 4 and the convex portion 73 of the driven member 7 are separated from each other in the axis L direction, and the end surface 72 of the driven member 7 and the first convex portion 45 of the driving member 4 are separated from each other in the axis L direction. For example, the drive member 4 and the driven member 7 are in contact with each other only at the first convex portion 45 and the first flat portion 751. Therefore, assembly of the rotation transmission mechanism 5 is easy.

  Further, the first convex portion 45 is formed in an arc shape in the driving member 4, and the first flat portion 751 is constituted by a part of the side surface 75 of the fan-shaped convex portion 73 in the driven member 7. Therefore, the strength of the first convex portion 45 is high, and the strength of the portion where the first flat portion 751 is formed is also high. Therefore, a large torque can be transmitted.

  Further, since the urging member 8 that urges the driven member 7 to the other side CCW around the axis L is provided for the driven member 7, the first convex portion 45 and the first flat portion 751 are always provided. You are in contact. Therefore, when the drive member 4 starts to rotate, the driven member 7 starts to rotate rapidly.

[Embodiment 2]
FIG. 6 is a cross-sectional view of the rotation transmission mechanism 5 provided in the motor device 100 according to Embodiment 2 of the present invention, and corresponds to a cross-sectional view taken along the line AA ′ of FIG. Since the basic configuration of this embodiment and later-described third and fourth embodiments is the same as that of the first embodiment, common portions are denoted by the same reference numerals and description thereof is omitted.

  In the rotation transmission mechanism 5 shown in FIG. 6, the drive member 4 is a first member having a first protrusion 45 that protrudes from the end face 44 to one side in the axis L direction, as in the first embodiment. It is configured. In this embodiment, the first convex portion 45 is provided in an arc shape at a position away from the axis L. The 1st convex part 45 is formed in circular arc shape over the angle range of about 90 degrees.

In this embodiment, when the drive member 4 (first member) is rotated around the axis L to the one side CW, the driven member 7 is rotated around the axis L to the one side CW, and the drive member 4 (first member) is rotated. When rotated to the other side CCW around the axis L, the driven member 7 is rotated about the axis L to the other side CCW.

  In this embodiment, in the driven member 7 (second member), the convex portion 73 has a sector shape having an arc angle of about 220 ° when viewed from the direction of the axis L, and the side surface 75 passes through the center (the axis L passes). A second side surface 757 connecting the center and the end of one side CW around the axis L of the arc surface 74. Have. Here, the first side surface 756 faces the other side CCW around the axis L, and the second side surface 757 faces the one side CW around the axis L. Therefore, in this embodiment, the first side surface 756 is configured with the first flat portion 751 that can contact the first end surface 451 of the first convex portion 45 from the one side CW around the axis L, and the second side surface 757 has A second flat portion 752 is configured such that the second end surface 452 of the first convex portion 45 can come into contact with the other side CCW around the axis L.

  Further, the first end face 451 on one side CW around the axis L of the first convex portion 45 is a convex curved surface when viewed from the direction of the axis L, and the other end CCW around the axis L of the first convex portion 45 is The second end surface 452 is also a convex curved surface when viewed from the direction of the axis L.

  Even when configured in this way, as in the first embodiment, even if a slight displacement occurs between the driving member 4 and the driven member 7, it is possible to suppress the occurrence of an extra load. For this reason, even with the rotation transmission mechanism 5 capable of transmitting rotation in both directions, high accuracy is not required for assembly, so that the rotation transmission mechanism 5 can be easily assembled. Play.

[Embodiment 3]
FIG. 7 is a cross-sectional view of the rotation transmission mechanism 5 provided in the motor device 100 according to Embodiment 3 of the present invention, and corresponds to a cross-sectional view taken along the line AA ′ of FIG.

  In the rotation transmission mechanism 5 shown in FIG. 7, the drive member 4 is configured as a first member having a first convex portion 46 that protrudes from the end surface 44 of 43 to one side in the axis L direction, as in the first embodiment. Yes. In the present embodiment, the first convex portion 46 is provided in a columnar shape at a position away from the axis L. Therefore, the first end surface 461 that is the end surface of the one side CW around the axis L of the first convex portion 46 is a convex curved surface when viewed from the direction of the axis L, and the other end of the first convex portion 46 around the axis L The second end surface 462, which is the end surface of the side CCW, is also a convex curved surface when viewed from the direction of the axis L.

  Also in this embodiment, as in the second embodiment, when the driving member 4 is rotated around the axis L to the one side CW, the driven member 7 is rotated around the axis L to the one side CW, and the driving member 4 is rotated around the axis L. The driven member 7 is rotated around the axis L to the other side CCW when rotated to the other side CCW.

  In the present embodiment, in the driven member 7 (second member), the convex portion 73 has a fan shape having an arc angle of about 270 ° when viewed from the direction of the axis L, and the side surface 75 passes through the center (the axis L passes). A second side surface 757 connecting the center and the end of one side CW around the axis L of the arc surface 74. Have. Here, the first side surface 756 faces the other side CCW around the axis L, and the second side surface 757 faces the one side CW around the axis L. Accordingly, the first flat surface 751 is formed on the first side surface 756 so that the first end surface 461 of the first convex portion 46 can come into contact with the one side CW around the axis L, and the first convex portion is formed on the second side surface 757. A second flat portion 752 is configured such that the second end surface 462 of 46 can come into contact with the other side CCW around the axis L.

Even when configured in this manner, as in the first embodiment, even if a slight displacement occurs between the drive member 4 and the driven member 7, it is possible to suppress the occurrence of an extra load. The same effects as those of the first embodiment are obtained.

[Embodiment 4]
FIG. 8 is a cross-sectional view of the rotation transmission mechanism 5 provided in the motor apparatus 100 according to Embodiment 4 of the present invention, and corresponds to a cross-sectional view taken along the line AA ′ of FIG.

  In the rotation transmission mechanism 5 shown in FIG. 8, the drive member 4 is configured as a first member having a columnar first convex portion 46 protruding from the end face 44 to one side in the axis L direction, as in the third embodiment. ing. The first end face 461 on one side CW around the axis L of the first convex portion 46 is a convex curved surface when viewed from the direction of the axis L.

  In the present embodiment, the drive member 4 is separated from the first convex portion 45 on the other side CCW around the axis L in the end face 44 and from the position spaced from the axis L in the radial direction, The 2nd convex part 47 protrudes to the side. The 2nd convex part 47 is cylindrical. For this reason, the second end surface 472 that is the end surface of the other side CCW around the axis L of the second convex portion 47 is a convex curved surface when viewed from the direction of the axis L.

  Also in this embodiment, when the drive member 4 (first member) is rotated around the axis L to the one side CW, the driven member 7 is rotated around the axis L to the one side CW and the drive member is also the same as in the third embodiment. When 4 (first member) rotates around the axis L to the other side CCW, the driven member 7 is rotated around the axis L to the other side CCW.

  In this embodiment, in the driven member 7 (second member), the convex portion 73 has a sector shape having an arc angle of about 220 ° when viewed from the direction of the axis L, and the side surface 75 passes through the center (the axis L passes). A second side surface 757 connecting the center and the end of one side CW around the axis L of the arc surface 74. Have. Here, the first side surface 756 faces the other side CCW around the axis L, and the second side surface 757 faces the one side CW around the axis L. Therefore, the first flat surface 751 is formed on the first side surface 756 so that the first end surface 461 of the first convex portion 46 can come into contact with the one side CW around the axis L, and the second convex portion is formed on the second side surface 757. A second flat portion 752 is configured such that the second end surface 472 of 47 can come into contact with the other side CCW around the axis L.

  Even when configured in this manner, as in the first embodiment, even if a slight displacement occurs between the drive member 4 and the driven member 7, it is possible to suppress the occurrence of an extra load. The same effects as those of the first embodiment are obtained.

(Other embodiments)
In the above embodiment, the drive member 4 is configured as a first member having the first convex portion 45 and the like, and the driven member 7 is configured as a second member having the first flat portion 751 and the like. May be configured as a first member having a first convex portion or the like, and the driving member 4 may be configured as a second member having a first flat portion or the like.

  In the present embodiment, the rotation transmission mechanism 5 is provided between the sixth gear (drive member 4) and the output member (driven member 7). However, the rotation transmission mechanism 5 is provided between the gears constituting the gear train 3. It may be provided.

DESCRIPTION OF SYMBOLS 1 ... Motor (drive source), 1a ... Stepping motor, 3 ... Gear train, 4 ... Drive member, 5 ... Rotation transmission mechanism, 6 ... Sensor mechanism, 7 ... Drive member, 8 ... Energizing member, 10 ... Rotor, 12 Rotating shaft, 20 Stator, 44, 72, End face, 45, 46 First convex portion, 47 Second convex portion, 7
DESCRIPTION OF SYMBOLS 3 ... Convex part, 74 ... Arc surface, 75 ... Side surface, 100 ... Motor apparatus, 451, 461 ... 1st end surface, 452, 462, 472 ... 2nd end surface, 720 ... Concave part, 751 ... 1st flat part, 752 ... 2nd flat part, 756 ... 1st side surface 757 ... 2nd end surface, CW ... one side, CCW ... other side, L ... axis, Lm ... motor axis

Claims (11)

A rotation transmission mechanism for transmitting rotation around an axis between a first member and a second member arranged coaxially with the first member;
The first member includes a first convex portion projecting to one side in the axial direction at a position spaced from the axial line in the radial direction,
The rotation transmission mechanism, wherein the second member is provided with a first flat portion on which the first convex portion can contact from one side around the axis toward the other side around the axis. .   2. The rotation transmission mechanism according to claim 1, wherein the first convex portion has a convex curved surface at a first end surface that is the one end surface around the axial line when viewed from the axial direction.   The second member is provided with a second flat portion, which can contact the first convex portion from the other side around the axis, toward the one side around the axis. Item 3. The rotation transmission mechanism according to Item 1 or 2.   4. The rotation transmission mechanism according to claim 3, wherein the first convex portion has a convex curved surface at a second end surface that is the other end surface around the axis when viewed in the axial direction. 5.   5. The rotation transmission mechanism according to claim 1, wherein the first convex portion is formed in an arc shape extending around the axis when viewed in the axial direction. . The second member includes a convex portion projecting to the other side in the axial direction with a fan shape when viewed from the axial direction,
The rotation transmission mechanism according to any one of claims 1 to 5, wherein the first flat portion is provided on the other side surface around the axis of the convex portion. The first member includes a second convex portion projecting on the one side in the axial direction at a position spaced apart from the axial side on the other side and the axial line with respect to the first convex portion,
The second member is provided with a second flat portion, toward which the second convex portion can contact from the other side around the axis, toward the one side around the axis. Item 3. The rotation transmission mechanism according to Item 1 or 2.   The rotation transmission mechanism according to claim 7, wherein the second convex portion has a convex curved surface at a second end surface that is the other end surface around the axial line when viewed from the axial direction. The first member is a drive member to which rotation from a drive source is transmitted,
The rotation transmission mechanism according to any one of claims 1 to 8, wherein the second member is a driven member that is driven by the first member. One of the first member and the second member is a drive member to which rotation from a drive source is transmitted, and the other member is a driven member that follows the first member,
The rotation transmission mechanism according to claim 1 or 2, wherein a biasing member that biases the driven member toward the other side around the axis is provided for the driven member. The first member is the driving member;
The rotation transmission mechanism according to claim 10, wherein the second member is the driven member.