Rotating Equipment

Abstract

To provide a rotating device in which a motor is firmly attached to a housing while requiring no space and having a simple structure. [Solution] A rotating device comprising a holder 2 having a pair of pieces 21, 21 and a main body 22, a motor 3 sandwiched between the pair of pieces 21, 21, and a housing 4 that accommodates the motor 3 sandwiched between the pair of pieces 21, 21, wherein the housing 4 is provided with a pressing portion 43 that presses the pair of pieces 21, 21 that sandwich the motor 3 toward the motor 3, and the holder 2 is provided with a pair of claws 23, 23 that extend in the opposite direction to the pair of pieces 21, 21, and the pair of claws 23, 23 hold a wiring board 6 that is connected to the motor 3.

Description

[Technical Field]

[0001] The present invention relates to a rotating device that includes a motor and supplies rotational driving force to various devices. [Background technology]

[0002] Conventionally, numerous motors have been used to supply rotational driving force to various devices. As motors are electrical components, they are sensitive to moisture and dust. However, depending on the operating environment, such as in automotive electrical equipment used outdoors, it may be difficult to keep them away from moisture and dust. For such environments, motors are housed in sealed containers.

[0003] Since motors generate driving force, they must be firmly fixed to the housing. However, with sealed containers, it is not possible to provide through-holes for installation in the housing, which makes installation cumbersome and requires space for installation. For example, if a belt-shaped clamping member made of metal or the like is wrapped around the motor and its ends are screwed in place, not only does this require space for the screwing, but the process is also complicated and costly.

[0004] Furthermore, if a flange is provided on the motor in advance and then screwed into place, space is still required for the screws, and the process is not sufficiently simplified. In this way, if the motor is to be securely attached to the housing, it becomes difficult to achieve a compact sealed container, and special processing is required, and the number of parts required for attachment increases, which complicates assembly and increases costs. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-147284 Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, the present invention has been made in view of the above background, and has an object to provide a rotating device that does not require much space, has a simple structure, and yet has a motor firmly attached to a housing. [Means for solving the problem]

[0007] The above-mentioned problems are solved by the present invention, which provides a rotating device comprising: a holder having a pair of pieces and a main body, a motor sandwiched between the pair of pieces, and a housing that houses the motor sandwiched between the pair of pieces, the housing being provided with a pressing portion that presses the pair of pieces sandwiching the motor toward the motor, and the holder being provided with a pair of claws that extend in the opposite direction from the pair of pieces, and the pair of claws holding a wiring board connected to the motor.

[0008] It is preferable that the pair of pieces be pressed in directions toward each other by the pressing portion. It is also preferable that the pair of pieces sandwich the motor from the outer periphery of the motor toward the inside.

[0009] It is preferable that the pair of pieces have an intermediate contact portion that contacts the motor at a position in the longitudinal direction of the pair of pieces where the width of the motor is at its widest, and an end contact portion that contacts the motor at a position different from the position where the width is at its widest.In this case, it is preferable that the end contact portion is a protrusion that protrudes toward the outer surface of the motor in the direction from one piece to the other piece of the pair of pieces.

[0010] On the other hand, in the rotating device of the present invention, it is preferable that a notch is formed in the outer edge of the wiring board, and the notch is held by the claw.

[0011] In this case, it is preferable that the device is provided with a housing, which includes the housing and a cover that covers the opening of the housing, and that the cover is provided with a protrusion that urges the claw in a direction that brings it closer to the edge. Specifically, the edge of the wiring board has opposing first and second parts, the claw has a pair of bifurcated pieces, the pair of pieces of the claw contact the first and second parts respectively, and the protrusion of the cover is positioned between the pair of pieces of the claw. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view of a rotating device according to an embodiment that is an example of the present invention. [Figure 2] 1 is an exploded perspective view of a rotating device according to an embodiment that is an example of the present invention. [Figure 3] FIG. 2 is an enlarged perspective view of a holder used in the rotating device according to the embodiment. [Figure 4] 1 is an enlarged front view of a rotating device according to an embodiment, showing only a holder and a motor. FIG. [Figure 5] FIG. 2 is a perspective view of a housing used in the rotating device according to the embodiment. [Figure 6] 1 is a top view illustrating a state in which a holder holding a motor is incorporated into a housing of a rotating device according to an embodiment. [Figure 7] 7 is a cross-sectional view taken along the line AA in FIG. 6. [Figure 8] 2 is an exploded perspective view showing the positional relationship between a holder, a wiring board, and a cover in the rotating device according to the embodiment; FIG. [Figure 9] 1 is a cross-sectional view (cross-sectional view taken along line BB in FIG. 1) of a rotating device according to an embodiment that is one example of the present invention. [Figure 10] 1 is a cross-sectional view (cross-sectional view taken along CC in FIG. 1) of a rotating device according to an embodiment that is one example of the present invention. [Figure 11] FIG. 2 is an enlarged perspective view of a holder used in the rotating device according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view of a rotating device according to an embodiment of the present invention, and Fig. 2 is an exploded perspective view. In Fig. 2, some of the components housed in a housing 4 are not shown because they are not directly related to the configuration of the present invention (the same applies to the subsequent drawings). In reality, a group of reduction gears that reduce the rotational driving force of a motor 3 is housed in the housing 4, allowing the desired rotational driving force to be output to the outside.

[0014] The rotating device 1 is configured by housing a motor 3 in a sealed container that is made up of a housing 4 with one side open and a cover 5 that is fitted to cover the opening. In this embodiment, a holder 2 is used to hold the motor 3, and the holder 2 also holds a wiring board 6.

[0015] The motor 3 is supplied with power and electrically controlled via a wiring board 6, so that the desired rotation speed can be controlled. The housing 4 is provided with a connection port 42 for introducing a wire harness (electric wires, not shown) for supplying power and transmitting electrical signals to the wiring board. The wiring board 6 has a plurality of notches 61 formed therein to serve as terminals, which are press-fitted into connectors (not shown) attached to the ends of the wire harnesses, thereby electrically connecting to an external power source or an external control device.

[0016] Fig. 3 shows an enlarged perspective view of the holder 2. Fig. 4 shows an enlarged front view of only the holder 2 and the motor 3 extracted from the rotating device 1 to show the state in which the motor 3 is held by the holder 2. The holder 2 is made of resin and has a pair of pieces (hereinafter referred to as holding pieces) 21, 21 and a main body 22 to which portions of the pair of holding pieces 21, 21 on one end 21x side are connected. The main body 22 is hard, but the pair of holding pieces 21, 21 are elastic and can move close to or apart from each other.

[0017] The pair of holding pieces 21, 21 includes a beam portion 211 extending in a flat plate shape from one end 21x connected to the main body 22, and a protruding portion 212 protruding in an arc-shaped cross section at the other end 21y. The protruding portion 212 protrudes from the beam portion 211 toward the outer circumferential surface of the motor 3 in a direction from one holding piece 21 toward the other holding piece 21 of the pair of holding pieces 21, 21. As shown in FIG. 4, the flat beam portion 211 contacts the motor 3 at a position slightly closer to the other end 21y (this contact position is referred to as the "middle contact portion 21a").

[0018] At this intermediate contact portion 21a, the pair of retaining pieces 21, 21 clamp the outer circumferential surface of the housing of the motor 3 from a direction perpendicular to the axial direction of the rotation shaft of the motor 3 (the vertical direction relative to the plane of the paper in FIG. 4) (i.e., at the position where the width of the motor 3 is at its widest in the extension direction of the retaining pieces 21). Because the pair of retaining pieces 21, 21 clamp the motor 3 from a direction perpendicular to the axial direction of the rotation shaft of the motor 3, the pair of retaining pieces 21, 21 can efficiently suppress the rotational motion and vibration of the motor 3, and can stably hold the driving motor 3.

[0019] 4, the protruding portion 212 that protrudes inward (toward the outer peripheral surface of the housing of the motor 3) contacts the motor 3 at a position closer to the one end 21x than its apex (the most protruding position where the width of the motor 3 is greatest). The portion of the protruding portion 212 that contacts the motor 3 at a position closer to the one end 21x is the end-side contact portion (hereinafter referred to as the "other-end-side contact portion") 21b. In other words, the other-end-side contact portion 21b contacts the motor 3 at a position on the bottom side of the housing 4 that is different from the position where the width of the motor 3 is greatest. Therefore, the holder 2 holds the motor 3 by embracing it with the intermediate contact portion 21a and the other-end-side contact portion 21b.

[0020] A curved recess 221 corresponding to the outer peripheral surface of the motor 3 is formed in the center of the extension direction of the main body 22, and the motor 3 is positioned by fitting the outer peripheral surface of the motor 3 into this recess 221, and together with the elastic force of the pair of holding pieces 21, 21, the holder 2 stably holds the motor 3.

[0021] When attempting to hold the motor 3 with the holder 2, the holder 2 is moved relatively closer to the motor 3 from the relative positions shown in Figure 2, and even if the protrusion 212 comes into contact with the outer surface of the motor 3, as long as the two are continued to be moved closer, the pair of holding pieces 21, 21 will expand due to their elasticity, and once the protrusion 212 passes the outer diameter of the motor 3, they will narrow, and the outer surface of the motor 3 will come into contact with the intermediate contact portion 21a and the other end contact portion 21b while fitting into the recess 221, and finally the motor 3 will be held in the holder 2.

[0022] In addition, the holder 2 may be moved closer to the axial direction of the rotation shaft of the motor 3 and inserted directly into the holding area of the motor 3 formed by the recess 221, the beam portion 211, and the protrusion portion 212, thereby holding the motor 3 with the holder 2. In this manner, the holder 2 holds the motor 3 as shown in FIG.

[0023] 5 shows a perspective view of the inside of the housing 4 seen from diagonally above. The housing 4 is a box-shaped container with an open top, and the holder 2 holding the motor 3 is incorporated into the housing 4 so that the other ends 21y of the pair of holding pieces 21, 21 are positioned toward the bottom 41 of the housing 4.

[0024] More specifically, two opposing inner wall surfaces 45 that rise vertically from the bottom 41 of the housing 4 toward the cover 5 are each provided with a pair of grooves 43, and the outer surfaces of the pair of holding pieces 21, 21 are slid and fitted into the grooves, thereby incorporating the holder 2 holding the motor 3 into the housing 4. Then, as will be described later, a portion of the holder 2 on the main body 22 side is pressed toward the bottom 41 of the housing 4, thereby fixing the holder 2 holding the motor 3 within the housing 4.

[0025] Fig. 6 is a top view showing the holder 2 holding the motor 3 installed in the housing 4, and Fig. 7 is a cross-sectional view taken along line AA thereof. As shown in Figs. 6 and 7, the outer surfaces of the pair of holding pieces 21 are restricted by groove wall surfaces 43a that form a pair of grooves 43 in the inner wall surface 45 of the housing 4, and the other ends 21y of the pair of holding pieces 21 are prevented from spreading in directions away from each other. In other words, the pair of grooves 43 form the "holding portion" referred to in the present invention.

[0026] Therefore, the assembled holder 2 prevents the other ends 21y of the pair of holding pieces 21 from spreading apart, and the pair of holding pieces 21 sandwich the motor 3 from the outer circumferential surface of the motor 3 toward the inside of the motor 3, maintaining a state in which the motor 3 is firmly held. In other words, with a small number of parts, no space required, and a simple structure, the pair of holding pieces 21 are pressed toward the motor 3 (in directions approaching each other) by the pressing portion (pair of grooves 43), and the motor 3 can be firmly held.

[0027] In particular, in this embodiment, the motor 3 is held by being embraced by the other end contact portion 21b, which protrudes toward the motor 3 from the intermediate contact portion 21a on the other end 21y side of the intermediate contact portion 21a that contacts the outer diameter of the motor 3, and this state is maintained by a pair of grooves 43 that form the ``holding portion,'' so that the motor 3 can be held more firmly.

[0028] In this embodiment, a rib 44 is provided on groove wall surface 43a of housing 4 that constitutes a pair of grooves 43, extending vertically from bottom 41 toward cover 5. Although only one rib 44 is visible in Fig. 5, the rib 44 is provided on both of the pair of grooves 43. This rib 44 protrudes at the same height from groove wall surface 43a up to a certain length in the vertical direction from bottom 41 toward cover 5, but then its height gradually decreases with increasing distance from bottom 41, and the end face of rib 44 is formed at an angle so that it disappears midway through groove 43.

[0029] The rib 44 biases a portion of the other end of the pair of holding pieces 21 from the outside. In other words, by providing the rib 44, the "holding portion" in this embodiment biases the other ends of the pair of holding pieces 21 in a direction that brings them closer to each other. Therefore, the motor 3 is more firmly held by the holder 2.

[0030] Furthermore, because the end face of the end of the rib 44 away from the bottom 41 is formed at an angle as described above, when the holder 2 holding the motor 3 is fitted by sliding the outer surfaces of the pair of holding pieces 21, 21 into the pair of grooves 43, it is smoothly press-fitted by the end of the rib 44. Therefore, even in the press-fit state, the holder 2 holding the motor 3 can be easily assembled into the housing 4.

[0031] 3 and 4, the main body 22 of the holder 2 is provided with a pair of claws (hereinafter referred to as holding claws) 23, 23 for holding the wiring board 6. The pair of holding claws 23, 23 extend from the main body 22 in the opposite direction to the pair of holding pieces 21, 21. Each of the pair of holding claws 23, 23 is also forked immediately from the main body 22 into a pair of pieces (hereinafter referred to as holding claw pieces) 23a, 23a'.

[0032] The pair of holding claws 23a, 23a' are positioned side by side with their tips spaced apart in a direction (width direction of the holding pieces 21) perpendicular to the direction from one of the pair of holding pieces 21 toward the other. In the example of this embodiment, the pair of holding claws 23a, 23a' are bifurcated near the main body 22 at the base end, but they may be bifurcated a little further towards the tip. A pair of protrusions (hereinafter referred to as holding protrusions) 23b, 23b' that protrude in directions facing away from each other are provided at the respective tips of the pair of holding claws 23a, 23a'.

[0033] 8 is an exploded perspective view showing the positional relationship when the wiring board 6 is fixed to the cover 5 by the holder 2. The wiring board 6 is rectangular, and has a pair of semicircular arc-shaped cutouts 61, 61 formed on the outer edges of opposing sides. A pair of holding claws 23, 23 fit into the pair of cutouts 61, 61, respectively. In the present invention, the "outer edge" of the wiring board refers to the outer edge of the external shape when the wiring board is viewed in a plan view, and does not include the edge of the opening when a through hole is provided in the wiring board.

[0034] The pair of cutouts 61 have opposing regions 61a at both ends of the semicircular arc, and the pair of holding claws 23a and 23a' come into contact with these regions 61a. These opposing regions 61a and 61a form the first and second opposing portions on the edge of the wiring board 6. It should be noted that, instead of providing a pair of notches 61, 61, for example, a through hole may be provided in the wiring board, and a pair of holding claws may be inserted into the through hole and fitted in. In this case, the edge of the opening of the through hole corresponds to the "edge" of the wiring board held by the holding claws as referred to in the present invention, and the area of the through hole that comes into contact with the pair of holding claws corresponds to the "opposing first and second portions" as referred to in the present invention.

[0035] Furthermore, the wiring board 6 is sandwiched in the thickness direction between the pair of holding protrusions 23b, 23b' of the holding claw 23 and the upper surface 222 of the main body 22 (the surface on which the pair of holding claws 23, 23 are provided).

[0036] In this state, as shown in Fig. 2, the wiring board 6, holder 2, and motor 3 are sandwiched between the housing 4 and the cover 5, and the opening of the housing 4 is covered and fixed with the cover 5. The two are fixed together by fitting six protrusions (hereinafter referred to as locking protrusions) 46 (see Fig. 6) provided on the outer periphery of the housing 4 near the opening into six holes (hereinafter referred to as locking holes) 51 (see Fig. 8) provided in corresponding locations on the cover 5.

[0037] When the cover 5 is fixed to the housing 4, the wiring board 6, holder 2, and motor 3 sandwiched therebetween are pressed down. Therefore, as described above, the main body 22 side of the holder 2 is pressed down toward the bottom 41 of the housing 4, and the holder 2 holding the motor 3 is fixed inside the housing 4. The wiring board 6 is also fixed to the cover 5 by the holder 2.

[0038] FIG. 9 is a cross-sectional view taken along the line BB of the rotating device 1 assembled as described above (see FIG. 1; FIG. 6 1 also illustrates the corresponding part of the BB cross section.) Similarly, FIG. 10 is a CC cross section of the rotating device 1 (see FIG. 1. The corresponding part of the CC cross section is also illustrated in FIG. 6). Furthermore, FIG. 11 is a perspective view seen from an angle where the ceiling part 53 of the cover 5 can be seen. The lower side in FIG. 11 is the diagonally lower left direction in FIG. 1.

[0039] The bottom 41 of the housing 4 and the ceiling 53 of the cover 5 face each other, forming a housing. A packing 7 is interposed between the housing 4 and the cover 5 to ensure the airtightness of the housing formed by these two. Note that in FIG. 6, the packing 7 is also depicted in addition to the housing 4.

[0040] A pair of protrusions (hereinafter referred to as urging protrusions) 52 are erected on the ceiling portion 53 of the cover 5. As can be seen from Fig. 10, these urging protrusions 52 are configured to fit in a wedge shape between the pair of holding claws 23a, 23a'. Note that Fig. 9 depicts a cross section at the part of the urging protrusions 52, so it can be seen that the urging protrusions 52 are located in front of the holding claws 23a'.

[0041] As described above, the outer sides of the pair of holding claws 23a, 23a' are in contact with the opposing regions 61a, 61a of the cutout 61, and when the biasing protrusion 52 fits like a wedge into the gap between them at their tip ends, the gap between them is biased in a direction that further widens the gap, that is, the biasing force toward the regions 61a, 61a that are the edges of the wiring board 6 increases. Note that, in the present invention, the term "wedge-like" does not require that the biasing protrusion be wedge-shaped, but rather refers to a mode in which the biasing protrusion functions as a wedge that is pressed into the gap between the pair of holding claws to widen the gap.

[0042] Further, a pair of holding projections 23 are provided at the tip of each of the pair of holding claws 23a, 23a'. b, 23b' are provided, and when the gap between the pair of holding claws 23a, 23a' widens, the holding protrusions 23b, 23b' act to press down onto the upper surface 222 of the main body 22, thereby strengthening the urging force from the thickness direction of the wiring board 6.

[0043] As described above, the biasing projections 52 provided on the cover 5 act to hold the wiring board 6 firmly. Furthermore, even if the pair of holding protrusions 23b, 23b' are not provided on the holding claws 23a, 23a', the function of holding the wiring board 6 is achieved by the action of the biasing protrusions 52 biasing the holding claws 23a, 23a' against the edge of the wiring board 6, but the action of the pair of holding protrusions 23b, 23b' allows the wiring board 6 to be held more firmly.

[0044] As described above, according to the rotating device 1 of this embodiment, not only the motor 3 but also the wiring board 6 can be firmly held in a sealed container (enclosure) consisting of the housing 4 and the cover 5 with a small number of parts, without requiring space, and with a simple structure.

[0045] While the rotating device of the present invention has been described above with reference to preferred embodiments, the rotating device of the present invention is not limited to the configuration of the above embodiments. For example, in the above embodiments, an example has been described in which the enclosure consisting of the housing 4 and the cover 5 is a sealed container, but in the present invention, this enclosure does not have to be a sealed container. Even if it is a normal, non-sealed container, the motor and wiring board can be securely held in an enclosure that includes at least the housing with a small number of parts, does not require space, and has a simple structure.

[0046] In the above embodiment, the motor 3 and the wiring board 6 are held in the enclosure made up of the housing 4 and the cover 5 using the holder 2. However, even if only one of them is held, the motor or the wiring board can be held firmly. This has the effect of keeping the material in place.

[0047] Furthermore, in the above embodiment, the assembly method has been described as follows: the motor 3 is held by the holder 2 and attached to the housing 4, and then the wiring board 6 is attached and the cover 5 is attached to the housing 4. However, the assembly order is not limited to this. For example, the motor 3 may be placed on the housing 4, and the holder 2 may be pressed down on the motor 3 to fix the motor 3 to the housing 4 with the holder 2, or the wiring board 6 may be attached to the cover 5 before the motor 3 is attached to the housing 4. In addition, some modifications are listed below.

[0048] In the above embodiment, an example has been given in which the rib 44 is formed on the groove wall surface 43a in the groove 43 as the pressing portion, but since the groove 43 alone acts to prevent the other end sides 21y of the pair of holding pieces 21, 21 from spreading in directions away from each other, it is not necessary to form the rib 44. Of course, since the formation of the rib 44 acts to bias the other end sides 21y of the pair of holding pieces 21, 21 in directions to bring them closer to each other, the configuration of this embodiment is preferable.

[0049] In the above embodiment, the pair of holding pieces 21, 21 as the holding portion sandwich the outer diameter of the motor 3 from a direction perpendicular to the axial direction of the rotation shaft of the motor 3. However, depending on the shape of the motor, it may be possible to hold it from another direction, and in the present invention, it is also acceptable to hold it from such a direction. Of course, by holding it from a direction as in this embodiment, the rotational motion and vibration of the motor 3 can be efficiently suppressed.

[0050] Furthermore, in the above embodiment, the pair of retaining pieces 21, 21 are in contact with the outer periphery of the motor 3 at positions separated by the intermediate contact portion 21a and the other end contact portion 21b, but for example, the contact portions of the pair of retaining pieces with the motor (the contact surface in the case of surface contact, and the contact line in the case of line contact) may have a shape corresponding to the outer periphery of the motor, and may be in continuous contact, with the intermediate contact portion and the other end contact portion being continuous.

[0051] In this case, it is desirable that the pressing portion also has a shape corresponding to the pair of holding pieces. That is, if the pair of holding pieces on the side opposite to the contact portion with the motor are also curved or curved, it is preferable to have a pressing portion with a corresponding curved or curved shape, and if they are flat (or linear) like this embodiment, it is preferable to have a flat pressing portion like this embodiment. In either configuration, it is effective and preferable to provide a rib as in this embodiment. In addition, a contact portion with the motor may be provided in addition to the intermediate contact portion and the other end contact portion.

[0052] In the above embodiment, the holding claws 23 provided on the holder 2 are described as being configured such that each of the pair of holding claws 23, 23 is composed of a pair of holding claw pieces 23a, 23a' that are bifurcated in the middle, and even one of the holding claws 23 has the holding force to hold the wiring board 6, but the present invention is not limited to this.

[0053] For example, the pair of holding claws may be arranged such that the tips of opposing long, plate-like bodies are bent into hook shapes on opposite sides, and the wiring board is held by its edge between them. In this case, it is preferable to provide a biasing protrusion on the ceiling of the cover that biases the pair of holding claws in a direction toward the edge of the wiring board. By providing such a biasing protrusion, the wiring board can be firmly held.

[0054] In this case, a notch like the notch 61 of this embodiment is provided on the outer edge of the wiring board. The wiring board may or may not have a notch. If a notch is provided, the pair of holding claws may be positioned in the notch to hold the edge, and if no notch is provided, the linear outer edge of the wiring board may be held as is. The former is preferred in that it makes it easier to position the wiring board. In this case, a pair of through holes may be provided in the wiring board, and the pair of holding claws may be inserted into the pair of through holes.

[0055] In addition, those skilled in the art can appropriately modify the rotating device of the present invention in accordance with conventionally known knowledge. As long as such modifications still include the configuration of the present invention, they are of course included in the scope of the present invention. [Explanation of symbols]

[0056] 1...rotating device, 2...holder, 21...holding piece (piece), 21a...middle contact portion, 21b...other end side contact portion (end side contact portion), 211...beam portion, 212...protrusion portion, 22...main body, 221...recess, 222...upper surface, 23...holding claw (claw), 23a, 23a'...holding claw piece (piece), 23b, 23b'...holding protrusion (protrusion), 3...motor, 4...housing, 41...bottom portion, 42...connection port, 43...groove (holding portion), 44...rib (holding portion), 45...inner wall surface, 46...engaging protrusion (protrusion), 5...cover, 51...engaging hole (hole portion), 52 energizing protrusion (protrusion), 6...wiring board, 61...notch, 61a...area, 7...packing

Claims

1. A holder having a pair of elastic pieces and a body having rigidity relative to the pair of pieces; a motor sandwiched between the pair of pieces; A wiring board; a housing that accommodates the motor; a cover that covers the opening of the housing; a group of reduction gears housed in the housing for reducing the rotation speed of the motor; Equipped with The pair of pieces is restricted by an inner wall surface of the housing, a rotating device, wherein the pair of elastic pieces are disposed between the motor and the wiring board in a direction from the housing toward the cover;

2. The rotating device according to claim 1 , wherein the holder has an extension portion that extends toward the wiring board, the extension portion being in contact with the wiring board.

3. the ends of the pair of pieces have protrusions that protrude in a radial direction of the motor, The rotating device according to claim 1 or 2, wherein the protrusion is pressed against the housing.

4. The rotating device according to claim 1 , wherein the main body connecting the pair of pieces is flat and extends in a radial direction of the motor.

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