Motor assembly and rotary apparatus

Abstract

This motor assembly (2) comprises a shaft (200), a motor (100), and a support member (30). The shaft (200) has a first end (210) and a second end (220). The motor (100) includes a first plate (10) and a second plate (20). The support member (30) extends from the second plate (20) in a rotational axis direction of the shaft (200) and supports the second end (220) of the shaft (200). The center of gravity position is located on the second end (220) side in the rotational axis direction. The motor (100) has one surface (110) and another surface (120) facing the rotational axis direction, and a cylindrical part (130) positioned between the one surface (110) and the other surface (120) in the rotational axis direction. The first plate (10) is fixed to the one surface (110), and the second plate (20) is fixed to the other surface (120).

Description

Motor assembly and rotating device

[0001] The present invention relates to a motor assembly and a rotating device.

[0002] In a rotating device (motor actuator) equipped with a motor, gears, and electronic components such as an integrated circuit (IC) for a local interconnect network (LIN) that controls the operation of the motor, a technique is known that uses a flexible wiring board such as an FPC (Flexible Printed Circuit) to prevent motor vibration from being transmitted to a control board. Another known technique is to provide an abutment portion extending from the reduction mechanism that abuts at a predetermined position on the electrical board between the mounting position of a connector and the mounting position of the reduction mechanism.

[0003] JP 2021-164350 A JP 2019-054602 A

[0004] However, when an FPC is used, it is necessary to solder the FPC to both the control board and the motor, which may increase the number of steps and costs.

[0005] One aspect of the present invention is to provide a motor assembly and a rotating device that can reduce the number of steps.

[0006] In one aspect, a motor assembly includes a shaft, a motor, and a support member. The shaft has a first end and a second end. The motor includes a first plate and a second plate. The support member extends from the second plate in the rotational axis direction of the shaft and supports the second end of the shaft. In the rotational axis direction, the center of gravity is located on the side of the second end. The motor has one surface and the other surface facing the rotational axis direction, and a cylindrical portion located between the one surface and the other surface in the rotational axis direction. The first plate is fixed to the one surface, and the second plate is fixed to the other surface.

[0007] According to one aspect, the number of steps can be reduced.

[0008] FIG. 1 is a perspective view showing an example of a rotating device according to a first embodiment. FIG. 2 is a side cross-sectional view showing an example of a rotating device according to the first embodiment. FIG. 3 is an exploded perspective view showing an example of a functional unit of the rotating device according to the first embodiment. FIG. 4 is an exploded perspective view showing an example of a motor assembly according to the first embodiment. FIG. 5 is a cross-sectional perspective view showing an example of a rotating device according to the first embodiment. FIG. 6 is another cross-sectional view showing an example of the rotating device according to the first embodiment. FIG. 7 is a perspective view showing an example of a functional unit of a rotating device according to a first modified example. FIG. 8 is a cross-sectional perspective view showing an example of a rotating device according to a second embodiment. FIG. 9 is an exploded perspective view showing an example of a functional unit of a rotating device according to a second modified example. FIG. 10 is an exploded perspective view showing an example of a functional unit of a rotating device according to a third modified example. FIG. 11 is an exploded perspective view showing an example of a functional unit of a rotating device according to a fourth modified example. FIG. 12 is a side cross-sectional view showing an example of a rotating device according to a fourth modified example. FIG. 13 is an exploded perspective view showing an example of a functional unit of a rotating device according to a fifth modified example. FIG. 14 is a side cross-sectional view showing an example of a rotating device according to the fifth modified example. FIG. 15 is an exploded perspective view showing an example of a functional section of a rotating device according to a sixth modified example.

[0009] Embodiments of a motor assembly and a rotating device disclosed herein will be described in detail below with reference to the drawings. Note that the dimensional relationships and ratios of elements in the drawings may differ from reality. The dimensional relationships and ratios may also differ between the drawings. To facilitate understanding, each drawing may illustrate a coordinate system in which the direction in which a shaft 200 (described later) extends (the rotational axis direction) is the X-axis direction, the direction in which the first plate 10 is disposed is the negative side of the X-axis, and the direction in which the second plate 20 is disposed is the positive side of the X-axis. Note that the same components are designated by the same reference numerals throughout the description of the embodiments.

[0010] First Embodiment First, a motor assembly and a rotating device according to a first embodiment will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a perspective view showing an example of the rotating device according to the first embodiment. Fig. 2 is a side cross-sectional view showing an example of the rotating device according to the first embodiment. Fig. 2 shows a cross section taken along line A-A in Fig. 1.

[0011] The rotating device 1 according to the embodiment can be suitably used as, for example, an actuator for a vehicle.

[0012] 1 and 2 , the rotating device 1 in the first embodiment has a functional unit including a motor assembly 2, a substrate 50, and a connector housing 60. The rotating device 1 also includes a gear group 70 having a plurality of transmission gears 71, 72 and an output gear 75. The functional unit of the rotating device 1 and the gear group 70 are housed in a housing 80.

[0013] The housing 80 has an opening 86 on the negative side in the Y-axis direction. A portion of the connector housing 60 protrudes from the opening 86 on the negative side in the Y-axis direction. The housing 80 may further have a cover (not shown) that is fitted from the positive side in the Z-axis direction. The cover may be made of a conductive material, in which case electromagnetic wave countermeasures can be implemented.

[0014] Next, each element constituting the functional unit will be described with reference to Figures 1 to 4. Figure 3 is an exploded perspective view showing an example of the functional unit of the rotating device in the first embodiment. Figure 4 is an exploded perspective view showing an example of the motor assembly in the first embodiment. In Figure 4, the substrate 50 and the connector housing 60 are shown by dashed lines.

[0015] 3 and 4, the motor assembly 2 includes a shaft 200, a motor 100, and a support member 30. The shaft 200 extends in the X-axis direction and has a first end 210 located on the negative side of the X-axis and a second end 220 located on the positive side of the X-axis.

[0016] The motor 100 is a drive device for rotating the output gear 75, and in the first embodiment, a DC motor is used as the motor 100. The motor 100 has one surface 110 and another surface 120 facing the rotation axis direction, and a cylindrical portion 130 located between the one surface 110 and the other surface 120 in the rotation axis direction. The motor 100 also includes coil terminals 151 to 154. The coil terminals 151 to 154 are located between the protrusions 11 and 12 and the first portion 69 in the rotation axis direction, i.e., the X-axis direction. The coil terminals 151 to 154 are an example of terminals electrically connected to a substrate.

[0017] In the first embodiment, the tubular portion 130 is formed in a substantially cylindrical shape, and one surface 110 and the other surface 120 have a substantially circular surface. Also, as shown in Fig. 4, the tubular portion 130 has an opening 150 on the negative side of the Z axis. Coil terminals 151 to 154 protrude from the opening 150 to the outside of the tubular portion 130.

[0018] 3 , the motor 100 includes a first plate 10 and a second plate 20. The first plate 10 and the second plate 20 are made of a non-magnetic, conductive metal such as stainless steel. The first plate 10 of the motor 100 is fixed to one surface 110, and the second plate 20 is fixed to the other surface 120.

[0019] The first plate 10 has protrusions 11 and 12 that extend in the negative direction on the Z axis, i.e., in the direction toward the connector housing 60. The first plate 10 also has a through hole 19 formed therein, through which the shaft 200 is inserted. A bearing 410 that rotatably supports the first end 210 of the shaft 200 is fixed to the first plate 10.

[0020] A through hole 29 through which the shaft 200 is inserted is formed in the second plate 20. A support member 30 extends from the second plate 20 in the direction of the rotation axis of the shaft 200, i.e., in the positive direction of the X-axis.

[0021] The support member 30 supports the second end 220 of the shaft 200. The support member 30 is formed of a highly rigid metal such as stainless steel. The support member 30 includes a first member 31 extending in the rotation axis direction and a second member 32 extending perpendicularly from the end of the first member 31 in the rotation axis direction. The first member 31 extends from the second plate 20 toward the positive side of the X axis, and the second member 32 extends, for example, from the end of the first member 31 on the positive side of the X axis toward the positive side of the Y axis. In this case, the first member 31 and the second member 32 form a substantially L-shape in side view.

[0022] The second member 32 is provided with a through hole 39 that penetrates in the direction of the rotation axis. A bearing 420 is fixed to the through hole 39. The bearing 420 rotatably supports the second end 220 of the shaft 200. In this configuration, the shaft 200 is supported at both ends by the bearings 410 and 420.

[0023] A worm gear 470 is fixed to the shaft 200. The worm gear 470 transmits the rotation of the shaft 200 to the transmission gear 71 shown in Figures 1 and 2. Note that in each drawing, the teeth of the worm gear 470, the transmission gears 71 and 72, and the output gear 75 may not be shown.

[0024] The transmission gears 71 and 72 are gears for transmitting the rotation of the shaft 200 to the output gear 75 at a predetermined reduction ratio (gear ratio), and in the first embodiment, the transmission gears 71 and 72 are both configured in multiple stages.

[0025] Specifically, the large diameter portion of the transmission gear 71 meshes with the worm gear 470 fixed to the shaft 200. The small diameter portion of the transmission gear 71 meshes with the large diameter portion of the transmission gear 72, and the small diameter portion of the transmission gear 72 meshes with the output gear 75.

[0026] The output gear 75 rotates in conjunction with the transmission gear 72, causing the output shaft 79 to rotate. For example, any drive shaft inside the vehicle is connected to the output shaft 79. In this case, the output shaft 79 outputs the rotational force of the motor 100 as a driving force for controlling the any drive shaft. In this way, multiple gears mesh with each other, so that the rotation of the shaft 200 is transmitted to the output shaft 79 of the output gear 75 at a predetermined reduction ratio.

[0027] In the first embodiment, the worm gear 470 is made of, for example, metal. In this case, the center of gravity of the motor assembly 2 is located toward the second end 220 of the shaft 200 in the rotational axis direction, i.e., on the positive side of the X axis relative to the center position C0 in the X axis direction. The worm gear may also be made of, for example, resin. This can contribute to reducing the weight of the entire device.

[0028] Next, the connection between the motor assembly 2 and the substrate 50 will be described with reference to Figures 1 to 6. Figure 5 is a cross-sectional perspective view showing an example of a rotating device according to the first embodiment. Figure 6 is another cross-sectional side view showing an example of a rotating device according to the first embodiment. Figure 5 shows a cross section taken along line B-B in Figure 1, and Figure 6 shows a cross section taken along line CC in Figure 1.

[0029] The connector housing 60 includes terminals 651 to 654 shown in FIG. 2 that connect the rotating device 1 to an external device (not shown), such as a power supply or a control device. The connector housing 60 faces the motor 100 via the substrate 50. A portion of the terminals 651 to 654 is exposed on the negative side in the Y-axis direction through the opening 650. Another portion of the terminals 651 to 654 is inserted into through holes 561 to 564 formed in the substrate 50, respectively. The connector housing 60 may also include a protrusion 659 that is inserted into a through hole 569 in the substrate 50.

[0030] The substrate 50 is made of glass fiber, epoxy resin, or the like, and electrically connects the motor 100 and the connector housing 60. A plurality of electronic components 551 to 553 are arranged on a surface 58 of the substrate 50 on the positive side in the Y axis direction, i.e., the surface facing the motor assembly 2. In this case, the electronic components 551 to 553 face the motor 100 or the support member 30 in the direction in which the protrusions 11 and 12 extend (the Y axis direction). The electronic components 551 to 553 are mounted, for example, by reflow soldering, in which cream solder is applied to the surface 58 of the substrate 50, the electronic components 551 to 553 are arranged, and then the components are heated to bond them.

[0031] 3, the substrate 50 includes through holes 511 to 514 through which the coil terminals 151 to 154 of the motor 100 are inserted, respectively, and through holes 561 to 564 through which the terminals 651 to 654 of the connector housing 60 are inserted, respectively, as shown in FIG. 4. The substrate 50 may also include a through hole 569 through which a protrusion 659 of the connector housing 60 is inserted. After the protrusion 659 is inserted into the through hole 569, the connector housing 60 and the substrate 50 may be joined by deforming the tip of the protrusion 659 by thermal caulking or the like.

[0032] The protrusions 11 and 12 of the first plate 10 of the motor 100 of the motor assembly 2 are supported by a substrate 50. Specifically, as shown in Fig. 5, the substrate 50 has holes 51 and 52, and the protrusions 11 and 12 of the first plate 10 are fixed to the holes 51 and 52, respectively.

[0033] The protrusions 11 and 12 are lightly press-fit into the holes 51 and 52. For example, as shown in Fig. 5, slight gaps are formed between the protrusions 11 and 12 and the holes 51 and 52. Furthermore, as shown in Fig. 6, the motor assembly 2 and the board 50 are separately held by a motor holding portion 81 and a board holding portion 85 of the housing 80, respectively. With this configuration, transmission of vibrations of the motor 100 to the board 50 is suppressed.

[0034] In the first embodiment, the holes 51 and 52 of the substrate 50 are electrically connected to a ground circuit (not shown) of the substrate 50. In this configuration, the protrusions 11 and 12 of the first plate 10 of the motor 100 come into contact with the holes 51 and 52 of the substrate 50, respectively, so that electromagnetic noise from the motor 100 can be released to the outside via the substrate 50.

[0035] In the first embodiment, the connector housing 60 is formed with a first portion 69 that protrudes toward the positive side of the Y axis. The board 50 is provided with a through-hole 59 that penetrates in a direction intersecting the rotation axis, for example, in the Y axis direction. The first portion 69 of the connector housing 60 penetrates the through-hole 59 of the board 50 and extends toward the motor 100. As shown in FIG. 2 , the first portion 69 contacts the second portion 109 of the tubular portion 130 of the motor 100 in a direction intersecting the rotation axis direction.

[0036] In this case, the motor assembly 2 is supported by the circuit board 50 or the connector housing 60 at three points: the protrusions 11 and 12 of the first plate 10 and the second portion 109, as shown in FIG. 3. Also, as shown in FIG. 2, the second portion 109 is spaced a distance D0 from the protrusions 11 and 12 of the first plate 10 in the direction of the rotation axis. This configuration prevents the motor assembly 2 from tipping over when the motor assembly 2 is attached to the circuit board 50, even if the center of gravity of the motor assembly 2 is located on the positive side of the X-axis relative to the center position C0 shown in FIG. 3. This allows the motor assembly 2 to be mounted on the circuit board 50 simultaneously when electronic components 551 to 553 are mounted on the circuit board 50 by reflow soldering.

[0037] 2, a gap G0 is formed between the motor assembly 2 and the surface 58 of the substrate 50 in the Y-axis direction. This allows electronic components 551 to 553 to be arranged on the surface 58 of the substrate 50. Furthermore, since the distance between the motor 100 and the substrate 50 can be ensured without using an FPC or the like, the number of steps required to manufacture the rotating device 1 can be reduced. Note that, as will be described later, the convex portion may be formed on another portion such as the second plate, and the first portion may be formed on the substrate 50.

[0038] Furthermore, coil terminals 151 to 154 protruding from motor 100 are inserted into through holes 511 to 514 formed in substrate 50, respectively. With this configuration, when electronic components 551 to 553 are mounted on substrate 50 by reflow soldering, coil terminals 151 to 154 can also be reflow soldered at the same time, thereby improving the efficiency of assembly work.

[0039] 6, the coil terminals 151 to 154 of the motor 100 extend in the Y-axis direction, i.e., in a direction inclined with respect to the extending direction of the protrusions 11 and 12. In this case, the coil terminals 151 to 154 are inserted obliquely with respect to the surface 58 of the substrate 50.

[0040] As described above, the motor assembly 2 in the first embodiment includes the shaft 200 having the first end 210 and the second end 220, the motor 100 including the first plate 10 and the second plate 20, and the support member 30 extending from the second plate 20 in the rotational axis direction of the shaft 200 to support the second end 220 of the shaft 200. In the rotational axis direction, the center of gravity is located on the side of the second end 220. The motor 100 has one surface 110 and another surface 120 facing the rotational axis direction, and a cylindrical portion 130 located between the one surface 110 and the other surface 120 in the rotational axis direction. The first plate 10 is fixed to the one surface 110, and the second plate 20 is fixed to the other surface 120. Furthermore, the rotating device 1 in the first embodiment includes a motor assembly 2, a substrate 50 electrically connected to the motor 100, and a connector housing 60 facing the motor 100 via the substrate 50. The motor assembly 2 includes protrusions 11, 12 extending from the first plate 10 or the second plate 20 toward the connector housing 60. The protrusions 11, 12 are supported by the substrate 50. A first portion 69 of the substrate 50 or the connector housing 60 contacts a second portion 109 of the motor assembly 2 in a direction intersecting the rotation axis direction. In the rotation axis direction, the second portion 109 is spaced apart from the protrusions 11, 12. With this configuration, when the motor 100 and the substrate 50 are spaced apart, the number of steps required to manufacture the rotating device 1 can be reduced and propagation of vibration from the motor 100 to the substrate 50 can be suppressed.

[0041] Alternatively, the protrusion 69 of the connector housing 60, which is the first portion, or the second portion 109 of the tubular portion 130 of the motor 100 may be configured to include the elastic member 900. Figure 7 is a perspective view showing an example of a functional portion of a rotating device in the first modified example. Note that in the following embodiments and modified examples, the same components as those shown in the drawings described above are designated by the same reference numerals, and redundant description will be omitted.

[0042] As shown in FIG. 7 , an elastic member 900 is disposed on the cylindrical portion 130 of the motor 100 of the motor assembly A2 in the first modified example, in a portion facing the protruding portion 69 of the connector housing 60. The elastic member 900 is formed of an elastic material, such as rubber or silicone. In this case, the protruding portion 69 contacts a surface 909 of the elastic member 900. The elastic member 900 is an example of a second portion. This configuration can further suppress the propagation of vibration from the motor 100 to the circuit board 50. The elastic member 900 may be a member having heat dissipation properties. In this case, heat generated by the electronic components 551 and the like can be dissipated by the heat dissipation member.

[0043] Second Embodiment In the first embodiment, a configuration was described in which the first portion 69 that contacts the second portion 109 of the motor 100 is formed on the connector housing 60, but the embodiment is not limited to this. For example, as shown in FIG. 8, the first portion B59 may be formed on the substrate B50. FIG. 8 is a cross-sectional perspective view showing an example of a rotating device according to a second embodiment. FIG. 8 shows a cross section of the rotating device B1 according to the second embodiment taken along line A-A shown in FIG.

[0044] A protrusion B59 extending from the substrate B50 toward the motor 100 is formed on a surface B58 on the positive side in the Y-axis of the substrate B50 of the rotating device B1 in the second embodiment. The protrusion B59 is an example of a first portion. The protrusion B59 contacts a second portion 109 that is part of the tubular portion 130 of the motor 100. In this case, the connector housing B60 does not have a portion that protrudes toward the positive side in the Y-axis.

[0045] Even in this configuration, the distance between the motor 100 and the substrate B50 can be secured without using an FPC or the like, thereby reducing the number of steps.

[0046] [Modifications] The position on the substrate where the first portion is formed is not limited to that shown in each embodiment, and may be a position as shown in Fig. 9 or 10. Fig. 9 is an exploded perspective view showing an example of a functional section of a rotating device according to a second modification. Fig. 10 is an exploded perspective view showing an example of a functional section of a rotating device according to a third modification. Note that the position where the first portion is formed is preferably located on the positive side of the X-axis relative to the center position C0 in the X-axis direction of motor 100 shown in Fig. 3.

[0047] In the second modified example, a protruding portion C57 on the surface C58 of the substrate C50 is formed at a position facing the second plate C20 in the Y-axis direction. The protruding portion C57 is an example of a first portion. The second plate C20 in the second modified example also includes a second portion C27 that protrudes toward the negative side of the Y-axis. In this case, the protruding portion C57 of the substrate C50 and the second portion C27 of the second plate C20 are in contact with each other. Even in this configuration, the motor assembly C2 is supported by the substrate C50 at three points: the convex portions 11 and 12 formed on the first plate 10 and the second portion C27 of the second plate C20.

[0048] In the third modified example, the protrusion D57 on the surface D58 of the substrate D50 is formed at a position facing the second member 32 of the support member D30 in the Y-axis direction. The protrusion D57 is an example of a first portion. The support member D30 also includes a third member D37 that protrudes toward the negative side of the Y-axis. In this case, the protrusion D57 of the substrate D50 and the third member D37 of the support member D30 are in contact with each other. The third member D37 is an example of a second portion. Even in this configuration, the motor assembly D2 is supported by the substrate D50 at three points: the protrusions 11 and 12 formed on the first plate 10 and the third member D37 of the support member D30.

[0049] In the substrate D50 of the third modification, a protrusion D57 is formed at a position on the substrate 50 where the electronic component 551 is to be placed, and therefore the electronic component 551 is not placed on the substrate D50. In this way, the position at which the electronic component is placed and the number of electronic components to be placed may be changed depending on the position of the protrusion.

[0050] Furthermore, although the configuration in which the first portion of the substrate protrudes toward the second portion of the motor assembly has been described, the second portion of the motor assembly may also protrude toward the first portion of the substrate or connector housing, i.e., toward the negative side of the Y axis. FIG. 11 is an exploded perspective view showing an example of a functional portion of a rotating device according to a fourth modified example. FIG. 12 is a side cross-sectional view showing an example of a rotating device according to the fourth modified example. FIG. 13 is an exploded perspective view showing an example of a functional portion of a rotating device according to a fifth modified example. FIG. 14 is a side cross-sectional view showing an example of a rotating device according to the fifth modified example. FIG. 12 shows a cross-section of the rotating device E1 according to the fourth modified example taken along line A-A in FIG. 1, and FIG. 14 shows a cross-section of the rotating device F1 according to the fifth modified example taken along line D-D in FIG. 2.

[0051] As shown in Fig. 11 , in the support member E30 of the fourth modified example, the third member E35 has a length in the Y-axis direction greater than that of the third member D37 of the third modified example shown in Fig. 10 . The third member E35 is an example of the second portion. That is, the second portion E35 of the fourth modified example is a protrusion extending from the support member E30 toward the connector housing B60.

[0052] In this case, the third member E35 contacts a first portion E55 on the surface E58 of the substrate E50, as shown in Fig. 12. That is, the first portion E55 in the fourth modified example is a portion of the substrate E50 that faces the support member E30 in a direction intersecting the rotation axis direction.

[0053] With this configuration, the motor assembly E2 is supported on the substrate E50 at three points: the protrusions 11 and 12 of the first plate 10 and the third member E35 of the support member E30. Note that the surface E58 of the substrate E50 does not have a portion corresponding to the protrusion C57 shown in Fig. 9. The substrate E50 also does not include an electronic component 551 located near the first portion E55.

[0054] In the fifth modified example, the second plate F20 has protrusions F23 and F24 that protrude toward the negative side of the Y axis. The protrusions F23 and F24 are an example of the second portion. That is, the second portions F23 and F24 in the fifth modified example are protrusions that extend from the second plate F20 toward the connector housing B60.

[0055] In this case, the protrusions F23 and F24 contact the first portions F53 and F54, respectively, of the surface F58 of the substrate F50. That is, the first portions F53 and F54 in the fifth modified example are portions of the substrate F50 that face the second plate F20 in a direction intersecting the rotation axis direction.

[0056] In this configuration, the motor assembly F2 is supported on the substrate F50 at four points: the protrusions 11 and 12 of the first plate 10 and the protrusions F23 and F24 of the second plate F20.

[0057] [Other Modifications] While the configurations of the respective embodiments and modifications have been described above, the embodiments and modifications are not limited to these, and the respective embodiments may be combined as appropriate. For example, the elastic member 900 shown in the first modification may be arranged on the first portion of the board or the connector housing.

[0058] Further, as shown in Fig. 15, the convex portion to be press-fitted into the substrate may be formed on the second plate instead of the first plate. Fig. 15 is an exploded perspective view showing an example of a functional portion of a rotating device in a sixth modified example.

[0059] The protrusions G23 and G24 formed on the second plate G20 of the motor assembly G2 are lightly press-fit into the holes G53 and G54 formed in the substrate G50, respectively. In this case, the protrusions G23 and G24 are electrically connected to the ground circuit (not shown) of the substrate G50. The protrusion G11 formed on the first plate G10 contacts the first portion G51 of the surface G58 of the substrate G50. Similarly, the protrusion G12 (not shown) contacts the first portion G52 of the surface G58. In the sixth modification, the motor assembly G2 is also supported on the substrate G50 at four points: the protrusions G11 and G12 of the first plate G10 and the protrusions G23 and G24 of the second plate G20. The protrusions G11 and G12 are an example of the second portion.

[0060] Although the present invention has been described above based on the embodiments and modifications thereof, it goes without saying that the present invention is not limited to the embodiments and modifications thereof, and various modifications are possible without departing from the spirit of the present invention. Such modifications without departing from the spirit of the present invention are also included in the technical scope of the present invention, and this will be clear to those skilled in the art from the description of the claims.

[0061] 1, B1, E1, F1 Rotating device, 2, A2, C2, D2, E2, F2, G2 Motor assembly, 10, G10 First plate, 11, 12, F23, F24, G11, G12, G23, G24 Convex portion, 20, C20, F20, G20 Second plate, 30, D30, E30 Support member, 31 First member, 32 Second member, D37, E35 Third member, 39 Through hole, 50, B50, C50, D50, E50, F50, G50 Substrate, 51, 52, G53, G54 Hole portion, C57, D57 Protrusion portion, 58, B58, C58, D58, E58, F58, G58 Surface, 59 Through hole, 60, B60 Connector housing, 69, B59, E55, F53, F54, G51, G52 First portion, 70 Gear group, 71, 72 Transmission gear, 75 Output gear, 79 Output shaft, 80 Housing, 81 Motor holding portion, 85 Board holding portion, 86 Opening, 100 Motor, 109, C27 Second portion, 110 One surface, 120 Other surface, 130 Cylinder portion, 150 Opening, 151 to 154 Coil terminal, 200 Shaft, 210 First end, 220 Second end, 410, 420 Bearing, 470 Worm gear, 511 to 514 Through hole, 551 to 553 Electronic component, 561 to 564 Through hole, 569 Through hole, 651 to 654 Terminal, 659 Protrusion, 900 Elastic member

Claims

1. A motor assembly comprising: a shaft having a first end and a second end; a motor having a first plate and a second plate; and a support member extending from the second plate in the direction of the rotational axis of the shaft and supporting the second end of the shaft, wherein the center of gravity is located on the side of the second end in the direction of the rotational axis, and the motor has one surface and the other surface facing the direction of the rotational axis, and a cylindrical portion located between the one surface and the other surface in the direction of the rotational axis, and the first plate is fixed to the one surface, and the second plate is fixed to the other surface.

2. A motor assembly as described in claim 1, wherein the support member comprises a first member extending in the direction of the rotation axis and a second member extending perpendicularly from an end of the first member in the direction of the rotation axis, the second member having a through hole passing through in the direction of the rotation axis, a bearing fixed to the through hole, and the second end of the shaft being rotatably supported by the bearing.

3. A motor assembly as set forth in claim 1, wherein said shaft has a worm gear fixed thereto.

4. A rotating device comprising: the motor assembly according to claim 1; a substrate electrically connected to the motor; and a connector housing facing the motor via the substrate, wherein the motor assembly has a convex portion extending in a direction from the first plate or the second plate toward the connector housing, the convex portion being supported by the substrate, a first portion of the substrate or the connector housing and a second portion of the motor assembly being in contact in a direction intersecting the rotational axis direction, and the second portion being spaced apart from the convex portion in the rotational axis direction.

5. The rotating device according to claim 4, wherein the substrate has a hole, the hole is electrically connected to a ground circuit of the substrate, and the protrusion is fixed to the hole.

6. The rotating device according to claim 4, wherein the first portion is a protrusion extending from the substrate toward the motor, and the second portion is a part of the cylindrical portion of the motor.

7. The rotating device according to claim 4, wherein the substrate is provided with a through-hole that penetrates in a direction intersecting the rotation axis direction, the first part is a protrusion that extends from the connector housing, penetrates the through-hole of the substrate, and extends toward the motor, and the second part is a part of the cylindrical part of the motor.

8. A rotating device according to claim 4, wherein the second portion is a protrusion extending from the second plate toward the connector housing, and the first portion is a portion of the substrate that faces the second plate in a direction intersecting the rotation axis direction.

9. A rotating device as described in claim 4, wherein the second portion is a protrusion extending from the support member toward the connector housing, and the first portion is a portion of the substrate that faces the support member in a direction intersecting the rotation axis direction.

10. The rotating device according to any one of claims 6 to 9, wherein the first portion is provided closer to the second end than the protrusion in the direction of the rotation axis.

11. A rotating device according to any one of claims 6 to 9, wherein the first portion or the second portion comprises an elastic member.

12. A rotating device according to claim 4 or 5, wherein the motor assembly includes a terminal electrically connected to the substrate, the terminal being located between the protrusion and the first portion in the direction of the rotation axis and extending in a direction inclined relative to the direction in which the protrusion extends.

13. A rotating device according to claim 4 or 5, wherein an electronic component is arranged on a surface of the substrate facing the motor assembly, and the electronic component faces the motor or the support member in the direction in which the protrusion extends.

Images