Motor unit

Abstract

To provide a monitor unit with which work for mounting a motor to a case can be easily performed.SOLUTION: A motor unit 10 comprises a motor 14, a plurality of engaged parts 42, a lower case 72, and a plurality of first engaging parts 132. The motor 14 includes a rotary shaft 28 extending in a longitudinal direction. The engaged parts 42 are provided in the motor 14 and positioned at intervals in a lateral direction that crosses the longitudinal direction. The lower case 72 stores the rotary shaft 28 therein and supports the motor 14 from a lower side in a vertical direction that crosses both the longitudinal direction and the lateral direction. The plurality of first engaging parts 132 is provided in the lower case 72, elastically deformable in the lateral direction and engaged with the plurality of engaged parts 42.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a motor unit. [Background technology]

[0002] The motor of Patent Document 1 has a motor section that generates rotational force, an output section connected to the motor section, and a cover that covers the outer periphery of the output section. A yoke housing, which is the outer shell of the motor section, has a flange section. The output section has a brush holder accommodating section. The output section is integrated with the motor section by fixing the brush holder accommodating section and the flange section with screws. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-019409 Summary of the Invention [Problem to be solved by the invention]

[0004] When fastening a motor to a case with screws in a motor unit as in Patent Document 1, a process of positioning the motor relative to the case, a process of placing the screws, and a process of fastening the screws with a tool are required, resulting in a large number of steps. Furthermore, the tightening torque of the screws must be managed, making the work of attaching the motor to the case complicated.

[0005] An object of the present disclosure is to provide a motor unit that reduces the number of steps required to attach a motor to a case compared to when screws are used, and that simplifies the task of attaching the motor to the case. [Means for solving the problem]

[0006] A motor unit according to one aspect of the present disclosure includes a motor, a plurality of engaged parts, a case, and a plurality of engaging parts. The motor includes a rotating shaft extending in a first direction. The plurality of engaged parts are provided on the motor and positioned at intervals in a second direction intersecting the first direction. The case houses the rotating shaft and supports the motor from one side in a third direction intersecting both the first direction and the second direction. The plurality of engaging parts are provided on the case, are elastically deformable in the second direction, and engage with the plurality of engaged parts. [Effects of the Invention]

[0007] According to the present disclosure, the number of steps required to attach a motor to a case can be reduced compared to when screws are used, and the task of attaching a motor to a case can be easily performed. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a motor unit according to a first embodiment, as viewed obliquely from below. [Figure 2] FIG. 2 is an exploded view of the motor unit shown in FIG. [Figure 3] FIG. 3 is a cross-sectional view of the motor unit shown in FIG. 1 (a cross-sectional view taken along line AA in FIG. 1). [Figure 4] 4 is a perspective view showing a part of the internal structure of the motor unit shown in FIG. [Figure 5] 5 is a perspective view of a lower case of the motor unit shown in FIG. 1. FIG. [Figure 6A] 6A is a perspective view showing the rear part of the lower case of the motor unit shown in FIG. 1. FIG. [Figure 6B] 6B is a perspective view of the rear part of the lower case of the motor unit shown in FIG. 6A, seen from a different direction. [Figure 7A] 7A is a perspective view of a mounting member of the motor unit shown in FIG. 1. FIG. [Figure 7B] FIG. 7B is a front view of the mounting member shown in FIG. 7A. [Figure 8A]8A is a perspective view showing a state in which a mounting member and a detected member are assembled to the motor of the motor unit shown in FIG. 1. FIG. [Figure 8B] FIG. 8B is a perspective view showing the state in which the motor and other components assembled in FIG. 8A are being assembled into the lower case. [Figure 8C] FIG. 8C is a perspective view showing a state in which the motor and other components are assembled in the lower case. [Figure 9] FIG. 9 is a perspective view showing an engaged state between the first engaging portion and the engaged portion. [Figure 10] FIG. 10 is a cross-sectional view of the motor unit shown in FIG. 1 (a cross-sectional view taken along line BB in FIG. 1). [Figure 11] FIG. 11 is a perspective view of a motor unit according to the second embodiment. [Figure 12] FIG. 12 is an exploded view of the motor unit shown in FIG. [Figure 13] 13 is a perspective view showing the motor and the lower case of the motor unit shown in FIG. 11. FIG. [Figure 14A] 14A is a perspective view showing a part of the lower case of the motor unit shown in FIG. 11. FIG. [Figure 14B] FIG. 14B is a front view of the lower case shown in FIG. 14A. [Figure 15A] 15A is a perspective view showing a state in which the motor of the motor unit shown in FIG. 11 is placed on the case. [Figure 15B] FIG. 15B is a perspective view showing a state in which the motor placed on the case in FIG. 15A is slid. [Figure 15C] FIG. 15C is a perspective view showing a state in which the motor is assembled to the lower case. [Figure 16] 16 is a cross-sectional view (cross-sectional view taken along line CC in FIG. 11) of the motor unit shown in FIG. 11 with the upper case removed. DETAILED DESCRIPTION OF THE INVENTION

[0009] Each embodiment and each modified example of the present disclosure will be described in detail below with reference to the drawings. Note that in all drawings referred to in describing each embodiment and modified example, the same or substantially the same configurations and elements will be designated by the same reference numerals. Furthermore, as a general rule, configurations and elements that have already been described will not be described again. In the following description, unless otherwise specified, terms such as "first" and "second" are used merely to distinguish components from one another and do not represent a specific order or sequence.

[0010] [Configurations of the first embodiment] 1 shows a motor unit 10 according to a first embodiment. The motor unit 10 includes a motor section 12 and a speed reduction mechanism section 50. The speed reduction mechanism section 50 reduces the rotation speed of a rotary shaft 28 (FIG. 2) of the motor section 12, which will be described later, and transmits the rotation to a mechanism section (not shown).

[0011] As shown in FIG. 2, the motor section 12 has a motor 14 and four (plural) engaged portions 42. The speed reduction mechanism section 50 has a case section 52, a detected member 118, and an attachment member 120 including an insertion section 122 and four first engaging portions 132. In other words, the motor unit 10 has the motor 14, the four engaged portions 42, the case section 52, the insertion section 122, and the plurality of first engaging portions 132. Furthermore, the motor unit 10 has a photointerrupter 81 (FIG. 1), a photointerrupter 103 (FIG. 4), an intermediate gear 113, an output gear 115 (FIG. 2), and two (plural) second engaging portions 136.

[0012] <Motor> 3, the motor 14 includes a motor case 16, a rotating shaft 28, magnets 31 and 32, a rotor 34, and a coil 36. The motor 14 is, for example, a direct current motor (DC motor). A portion of the rotating shaft 28, the magnets 31 and 32, the rotor 34, and the coil 36 are housed inside the motor case 16.

[0013] In the following description, the direction in which the rotating shaft 28 extends is referred to as the front-rear direction. The direction in which the motor 14 is supported by the case portion 52 is referred to as the up-down direction. Furthermore, the direction in which the engaged portions 42, which will be described later, are positioned with a gap therebetween is referred to as the left-right direction. Furthermore, the direction in which the motor 14 is supported by the case portion 52 is referred to as the up-down direction. The front-rear direction, left-right direction, and up-down direction are perpendicular to each other. The front-rear direction is an example of a first direction. The left-right direction is an example of a second direction. The up-down direction is an example of a third direction. Note that the front-rear direction, left-right direction, and up-down direction are set merely for the convenience of description.

[0014] <<Motor case>> The motor case 16 is a cylindrical member made of metal. The motor case 16 has first side walls 17, 18, second side walls 19, 21, a front wall 22 (FIG. 2), and a rear wall 24 (FIG. 2). The first side walls 17, 18 are spaced apart in the left-right direction. The first side wall 17 is located on the left side of the rotor 34. The first side wall 18 is located on the right side of the rotor 34. The first side walls 17, 18 are each formed in a flat plate shape with a predetermined thickness in the left-right direction and extend along the front-rear and up-down directions.

[0015] The second side wall 19 and the second side wall 21 are positioned with a gap between them in the up-down direction. The second side wall 19 and the second side wall 21 are formed in an arc shape when viewed from the front-rear direction. The second side wall 19 is positioned above the rotor 34. The second side wall 21 is positioned below the rotor 34.

[0016] 4, the front wall 22 of the motor case 16 is connected to the front ends of the first side walls 17, 18 and the second side walls 19, 21. The front wall 22 is formed in a flat plate shape that extends in the left-right and up-down directions. A bearing 23 that supports the rotating shaft 28 of the motor 14 is provided on the front wall 22.

[0017] The bearing portion 23 is formed in a disk shape having a predetermined thickness in the front-rear direction. The bearing portion 23 protrudes forward from the front wall 22. In other words, a step is formed between the front surface of the bearing portion 23 and the front surface of the front wall 22. A through hole 23A is formed in the bearing portion 23. The rotation shaft 28 passes through the through hole 23A. The bearing portion 23 is sandwiched in the vertical direction between a support portion 106 (FIG. 2) described later and an insertion portion 122 (FIG. 2) of the mounting member 120 described later.

[0018] 2, the rear wall 24 is formed in a flat plate shape along the left-right and up-down directions. The rear wall 24 is provided with a bearing portion 25 and two terminal portions 26. Electric power (current) is supplied to the two terminal portions 26 from a power source (not shown).

[0019] <<Rotation axis>> The rotating shaft 28 is a cylindrical member that extends in the front-to-rear direction. The rotating shaft 28 has a central axis C (FIG. 3) that serves as the center of rotation. The rotating shaft 28 protrudes forward from the front wall 22. The rotating shaft 28 is rotatably supported by the bearings 23 (FIG. 4) and 25.

[0020] <<Rotor and coil>> As shown in Figure 3, a rotor 34 is fixed to the rear of the rotating shaft 28. A coil 36 is connected to the terminal portion 26 (Figure 2) and wound around the rotor 34. In the motor 14, the rotor 34 rotates due to the interaction between a magnetic force generated by supplying power (current) to the coil 36 and the magnetic forces of the magnets 31 and 32. The rotating shaft 28 then rotates in conjunction with the rotation of the rotor 34.

[0021] <<Magnet>> The magnets 31 and 32 are housed in the motor case 16. The cross section of each of the magnets 31 and 32 when viewed from the front-to-rear direction is formed in an arc shape. Note that the magnetic poles of the magnets 31 and 32 are not shown. The magnet 31 is located above the rotor 34 and is fixed to the inner circumferential surface of the second side wall 19. The inner circumferential surface of the magnet 31 faces the outer circumferential surface of the rotor 34. The magnet 32 ​​is located below the rotor 34 and is fixed to the inner circumferential surface of the second side wall 21. The inner circumferential surface of the magnet 32 ​​faces the outer circumferential surface of the rotor 34.

[0022] <Engaged part> As an example, four engaged portions 42 are provided, two on each of the first side walls 17 and 18 of the motor 14. Of the four engaged portions 42, one set (two) of the engaged portions 42 are provided in the front of the first side wall 17, spaced apart in the vertical direction. The remaining set (two) of the engaged portions 42 are provided in the front of the first side wall 18, spaced apart in the vertical direction. Furthermore, the two sets of engaged portions 42 are positioned spaced apart in the horizontal direction. In this way, the four engaged portions 42 are provided on the motor 14, spaced apart in the horizontal and vertical directions, so as to be located at the vertices of an imaginary rectangle when viewed from the front-rear direction. In the following description, when there is no need to distinguish between the four engaged portions 42, they will simply be referred to as "engaged portions 42."

[0023] The engaged portion 42 is the peripheral portion of a through-hole that penetrates the first side wall 17 or the first side wall 18 in the left-right direction. When viewed from the left-right direction, the engaged portion 42 is formed in a rectangular shape having sides that run along the front-rear direction and sides that run along the up-down direction. As an example, the engaged portion 42 is formed by cutting inward a portion of the first side wall 17 and a portion of the first side wall 18 (FIG. 9). The shape and size of the engaged portion 42 are set to match the shape and size of the first protrusion 134, which will be described later. In other words, when the first protrusion 134 is engaged with the engaged portion 42, a gap is unlikely to be formed between the first protrusion 134 and the engaged portion 42.

[0024] Of the peripheral edge of the engaged portion 42, plate-shaped portions that are cut down toward the inside of the motor case 16 serve as positioning portions 44. As an example, the four positioning portions 44 position both circumferential ends of the magnets 31, 32 in the up-and-down direction inside the motor case 16 before the magnets 31, 32 are fixed to the motor case 16. In this way, the engaged portion 42 is recessed toward the inside of the motor case 16 and positions the magnets 31, 32.

[0025] <Case> 1, the case portion 52 has an upper case 54 and a lower case 72. The case portion 52 houses the rotary shaft 28 (FIG. 2) and supports the motor 14 from one side in the vertical direction (the lower side).

[0026] <<Upper case>> As shown in FIG. 2, the upper case 54 has an upper wall 55, a front wall 56, a rear wall 57, a left wall 58, and a right wall 59. In other words, the upper case 54 has a hollow portion that opens downward. For example, the dimension of the upper case 54 in the front-to-rear direction is greater than the dimension in the left-to-right direction. The upper case 54 is formed with through holes 67A and 67B that extend in the up-down direction. The through holes 67A and 67B are used when fastening screws (not shown) through the upper case 54 to the lower case 72.

[0027] An opening 61 is formed in the upper wall 55, for example, to which a photointerrupter 103 (FIG. 4) is attached. A notch 62 is formed in the rear wall 57, recessed upward. The notch 62 is cut out in a semicircular shape when viewed from the front-to-rear direction. The front portion of the second side wall 19 of the motor 14 comes into contact with the notch 62 from below.

[0028] A plate portion 63 is provided in front of the center of the left wall portion 58 in the front-to-rear direction. The plate portion 63 has a predetermined thickness in the left-to-right direction and extends downward from the left wall portion 58. A hole portion 64 is formed in the lower portion of the plate portion 63. The hole portion 64 is formed in a rectangular shape when viewed in the left-to-right direction. The hole portion 64 penetrates the plate portion 63 in the left-to-right direction.

[0029] A plate portion 65 is provided rearward of the center in the front-to-rear direction of the right wall portion 59. The plate portion 65 has a predetermined thickness in the left-to-right direction and extends downward from the right wall portion 59. A hole portion 66 is formed in the lower portion of the plate portion 65. The hole portion 66 is formed in a rectangular shape when viewed from the left-to-right direction. The hole portion 66 penetrates the plate portion 65 in the left-to-right direction.

[0030] <<Lower case>> As shown in FIG. 5, the lower case 72 has a bottom wall 73, a front wall 88, a protruding portion 89, a rear wall 92, a left wall 94, and a right wall 98. The lower case 72 is an example of a case. The lower case 72 has a storage portion 102 (FIG. 2) that opens upward. For example, the front-to-rear dimension of the lower case 72 is greater than the left-to-right dimension. Furthermore, the front-to-rear and left-to-right dimensions of the lower case 72 are approximately the same as the front-to-rear and left-to-right dimensions of the upper case 54. The lower case 72 is formed with screw holes 91A and 91B that extend in the up-down direction. The screw holes 91A and 91B are aligned in the up-down direction with the through holes 67A and 67B (FIG. 2). Screws (not shown) are fastened to the screw holes 91A and 91B.

[0031] The bottom wall portion 73 has a central bottom portion 74, a front bottom portion 76, and rear bottom portions 78 and 79. The central bottom portion 74 has a bottom surface 75. An opening 75A is formed in the bottom surface 75. A photointerrupter 81 (FIG. 1) is attached to the opening 75A. The front bottom portion 76 is located forward of the central bottom portion 74 and has a bottom surface 77. The rear bottom portions 78 and 79 are located rearward of the central bottom portion 74 and have bottom surfaces 83 and 84. The bottom surface 77 and the bottom surfaces 83 and 84 are located on the same plane. The bottom surface 75 is located above the bottom surfaces 77 and 83 and 84.

[0032] The rear bottom portion 78 and the rear bottom portion 79 each extend in the front-to-rear direction and are spaced apart in the left-to-right direction. A left-side cutout portion 85 is formed in the rear bottom portion 78. A right-side cutout portion 86 is formed in the rear bottom portion 79. The left-side cutout portion 85 is cut out from the bottom surface 83 toward the upper side. The left-side cutout portion 85 is cut out in a rectangular shape when viewed from the left-to-right direction. An insertion hole 108, which will be described later, is formed in the upper surface of the left-side cutout portion 85.

[0033] The right-side cutout 86 is cut out from the bottom surface 84 toward the upper side. The right-side cutout 86 is cut out in a rectangular shape when viewed from the left-right direction. An insertion hole 108 is formed in the upper surface of the right-side cutout 86. The protruding portion 89 extends forward from the upper end of the front wall portion 88. A cutout 93 (FIG. 2) that is recessed downward is formed in the lower part of the rear wall portion 92. The cutout 93 is cut out in a semicircular shape when viewed from the front-rear direction.

[0034] As shown in FIG. 2, the notch 93 comes into contact with the front portion of the second side wall 21 of the motor 14 in the up-down direction. In other words, the notch 93 is capable of supporting the motor 14. A recess 95 recessed toward the right is provided forward of the center of the left wall 94 in the front-to-rear direction. A protrusion 96 is provided in the recess 95. The protrusion 96 protrudes to the left from a part of the recess 95. The protrusion 96 is capable of engaging with the periphery of the hole 64.

[0035] As shown in Figure 4, a recess 99 recessed toward the left is provided rearward of the center in the front-to-rear direction of the right wall 98. A protrusion 101 is provided in the recess 99. The protrusion 101 protrudes to the right from a part of the recess 99. The protrusion 101 is capable of engaging with the periphery of the hole 66 (Figure 2).

[0036] As shown in Fig. 2, intermediate walls 104A and 104B are provided in the center of the storage section 102 in the front-to-rear direction. The intermediate walls 104A and 104B are positioned with a gap between them in the left-to-right direction. The storage section 102 is divided by the intermediate walls 104A and 104B into a first storage section 102A on the front side and a second storage section 102B on the rear side. A support section 106 is provided between the intermediate walls 104A and 104B.

[0037] The first housing portion 102A houses an intermediate gear 113, the front portion of the rotary shaft 28, and a detected member 118. The first housing portion 102A is also provided with a shaft portion 111 having a central axis along the vertical direction. The shaft portion 111 rotatably supports the intermediate gear 113. The intermediate gear 113 transmits rotational force transmitted from a worm 118A (described later) to an output gear 115.

[0038] The second housing portion 102B houses the front portion of the motor 14, the base end portion of the rotary shaft 28, and a mounting member 120 (described later). A notch 93 is provided in the rear portion of the second housing portion 102B.

[0039] 6A and 6B, the support portion 106 is a portion cut out in an arc shape. The support portion 106 extends from between the intermediate wall 104A and the intermediate wall 104B into the second housing portion 102B. The support portion 106 supports the bearing portion 23 (FIG. 4) of the motor 14. The support portion 106, together with a mounting member 120 (FIG. 2), which will be described later, vertically sandwiches the bearing portion 23.

[0040] Side surfaces 107 are formed on both left and right sides of the support portion 106. The side surfaces 107 stand upright in the vertical direction. In the bottom wall portion 73, insertion holes 108 are formed between the side surfaces 107 and the left wall portion 94, and between the side surfaces 107 and the right wall portion 98. The insertion holes 108 penetrate the bottom wall portion 73 in the vertical direction. This connects the spaces from the second accommodating portion 102B through the insertion holes 108 to the left notch 85 and the right notch 86 (FIG. 1). The peripheral edge of the insertion hole 108 is engageable with a second protrusion 138 (FIG. 7A), which will be described later.

[0041] As shown in Fig. 6B, the rear surface 105A of the intermediate wall 104A and the rear surface 105B of the intermediate wall 104B are each formed as flat surfaces extending in the left-right direction and the up-down direction. The rear surfaces 105A and 105B are guide surfaces that guide the front surface of the mounting member 120 (Fig. 2) in the up-down direction. An enlarged width portion 116 that is wider in the left-right direction than the rear portion is provided at the top of the second accommodating portion 102B and in a portion forward of the center in the front-to-back direction. The enlarged width portion 116 accommodates a first engaging portion 132 (Fig. 2), which will be described later.

[0042] <Detectable member> As shown in Fig. 2, the detected member 118 has a worm 118A and a plurality of light-shielding plates 118B. The worm 118A has threaded teeth, but in Fig. 2 it is shown simply as a cylindrical shape. A shaft hole 119 is formed in the worm 118A. The front part of the rotary shaft 28 is press-fitted into the shaft hole 119. The teeth of the worm 118A mesh with the teeth of the intermediate gear 113.

[0043] For example, the multiple light blocking plates 118B extend radially from the rear end of the worm 118A and are positioned at intervals around the circumferential direction of the worm 118A. The multiple light blocking plates 118B pass through the photointerrupter 81 (FIG. 1) and the photointerrupter 103 (FIG. 4) as the sensed member 118 rotates. The photointerrupter 81 and the photointerrupter 103 detect the light blocking state caused by the multiple light blocking plates 118B, thereby detecting the rotation angle and number of rotations of the sensed member 118 (rotation shaft 28).

[0044] <Mounting parts> 7A shows the mounting member 120. The mounting member 120 is a member made of resin. The mounting member 120 is a member in which an insertion portion 122, four (plural) first engagement portions 132, and two (plural) second engagement portions 136 are integrally formed.

[0045] <<Insertion part>> The insertion portion 122 is inserted into the lower case 72 (FIG. 2) in the vertical direction. The insertion portion 122 is formed in a flat plate shape having a predetermined thickness in the front-rear direction. Specifically, the insertion portion 122 has a flat plate portion 124, a columnar portion 126, a columnar portion 127, and a notch portion 128.

[0046] As shown in FIG. 7B, the flat plate portion 124 is formed in a rectangular shape with a length L1 in the left-right direction and a length L2 in the up-down direction, with the length L1 being longer than the length L2. The columnar portion 126 extends downward in the up-down direction from the lower left end of the flat plate portion 124. The columnar portion 127 extends downward in the up-down direction from the lower right end of the flat plate portion 124. The columnar portions 126 and 127 each have a length L3 in the up-down direction. For example, the length L3 is shorter than the length L2. For example, the length L4, which corresponds to the distance between the columnar portions 126 and 127 in the left-right direction, is longer than the length L3.

[0047] The cutout 128 is formed in the lower center in the left-right direction of the flat plate portion 124. When viewed from the front-rear direction, the cutout 128 is cut out in a semicircular shape from the lower end of the flat plate portion 124 to the upper side. The cutout 128 also has a curved surface 129. The curved surface 129 is a contact surface that comes into contact with the second side wall 19 (FIG. 3) in the up-down direction when the motor unit 10 (FIG. 1) is assembled.

[0048] <<First engagement portion>> As an example, four first engagement portions 132 are provided spaced apart in the left-right and up-down directions. The four first engagement portions 132 are an example of a plurality of engagement portions. The four first engagement portions 132 are provided on the lower case 72 by attaching the mounting member 120 to the lower case 72 (FIG. 2). The four first engagement portions 132 are elastically deformable in the left-right direction, and engage with the four engaged portions 42 (FIG. 2).

[0049] 7A, the four first engagement portions 132 extend rearward in the front-to-rear direction from the insertion portion 122 and are elastically deformable in the left-to-right direction. Of the four first engagement portions 132, the upper first engagement portion 132 is provided on the flat plate portion 124, and one lower first engagement portion 132 is provided on each of the columnar portions 126 and 127. In this way, the four first engagement portions 132 are provided at intervals in the left-to-right and up-to-down directions.

[0050] The first engagement portion 132 has a first arm 133 extending in the front-rear direction, and a first protrusion 134 protruding inward in the left-right direction from the rear end of the first arm 133. The portion of the first arm 133 from which the first protrusion 134 protrudes has a larger vertical width than other portions of the first arm 133. The length of the first arm 133 in the front-rear direction is designated L5.

[0051] 7B, the two first protrusions 134 on the left side protrude to the right, and the two first protrusions 134 on the right side protrude to the left. That is, the four first protrusions 134 each protrude inward in the left-right direction (toward the central axis C).

[0052] <<Second engagement portion>> The two second engagement portions 136 each extend downward in the up-down direction from the lower end of the insertion portion 122 (the columnar portions 126, 127) and are elastically deformable in the left-right direction. The two second engagement portions 136 are an example of the plurality of other engagement portions. The two second engagement portions 136 engage with the lower case 72 (FIG. 2).

[0053] As shown in Fig. 10, the two second engagement portions 136 engage with the peripheral portions of the two insertion holes 108 (the lower ends of the lower case 72). In the following description, when there is no need to distinguish between the two second engagement portions 136, they will simply be referred to as "second engagement portions 136." The second engagement portion 136 has a second arm 137 extending in the up-down direction and a second protrusion 138 protruding outward in the left-right direction from the lower end of the second arm 137. In other words, the two second protrusions 138 protrude outward in the left-right direction.

[0054] 7B, the four first protrusions 134 protrude inward in the left-right direction, and the two second protrusions 138 protrude outward in the left-right direction. In other words, the first protrusions 134 and the second protrusions 138 protrude in opposite directions in the left-right direction. Furthermore, the second protrusions 138 are positioned further outward in the left-right direction than the first protrusions 134.

[0055] The vertical length of second engagement portion 136 is designated as L6. As an example, length L6 is shorter than length L3 and longer than length L5 (FIG. 7A). The left-right width of second arm 137 is narrower than the left-right widths of columnar portions 126 and 127. In other words, second arm 137 is more susceptible to elastic deformation in the left-right direction than columnar portions 126 and 127.

[0056] 7A, end face 122A on the left side (one side) in the left-right direction of insertion portion 122, end face 133A on the left side in the left-right direction of first arm 133, and end face 137A on the left side in the left-right direction of second arm 137 are located on the same imaginary plane M. In other words, end face 122A, end face 133A, and end face 137A are located at the same position in the left-right direction. Note that mounting member 120 has a similar configuration on the right side (the other side) in the left-right direction.

[0057] [Functions of each configuration of the first embodiment] An example of the assembly procedure for the motor unit 10 will now be described.

[0058] 8A, the rotation shaft 28 is press-fitted into the shaft hole 119 of the detection member 118, thereby attaching the detection member 118 to the rotation shaft 28. Furthermore, the attachment member 120 is slid toward the rear in the front-to-rear direction relative to the motor 14. At this time, the four first protrusions 134 come into contact with the first side walls 17, 18, causing the four first arms 133 to spread in the left-to-right direction. Then, the attachment member 120 continues to slide.

[0059] As shown in Fig. 9, when the four first protrusions 134 reach a position facing the four engaged portions 42, the four first protrusions 134 receive an elastic force (restoring force) from the first arm 133 and enter the four engaged portions 42. The four first protrusions 134 then engage with the four engaged portions 42. In this way, the mounting member 120 is mounted to the motor 14. Note that two reference numerals are shown for the first protrusions 134 in Fig. 9.

[0060] As shown in FIG. 8B, the mounting member 120 is inserted from above toward the front end of the second housing portion 102B. The detected member 118 is inserted into the first housing portion 102A. The mounting member 120 and the front portion of the motor 14 are inserted into the second housing portion 102B. At this time, the second protrusion 138 comes into contact with the lower case 72 and receives a pressing force toward the motor 14 side (inward in the left-right direction). As a result, the second arm 137 elastically deforms toward the motor 14 side.

[0061] 8C, the motor 14 contacts the notch 93 of the lower case 72. The detected member 118 is housed in the first housing portion 102A.

[0062] 10 , when the second protrusions 138 of the mounting member 120 pass through the insertion holes 108, the posture of the second arms 137 is restored to a posture along the up-down direction by a restoring force. In other words, the second protrusions 138 move outward in the left-right direction. As a result, the two second protrusions 138 engage with the peripheries of the insertion holes 108. This allows the mounting member 120 to be mounted to the lower case 72.

[0063] When the mounting member 120 is attached to the lower case 72, the bearing 23 of the motor 14 is supported by the support portion 106 and receives a downward pressing force from the curved surface 129 of the mounting member 120. In other words, the bearing 23 is sandwiched in the vertical direction between the support portion 106 and the mounting member 120. At this time, the columnar portions 126 and 127 sandwich the support portion 106 in the horizontal direction. This positions the bearing 23 and the rotating shaft 28 in the vertical and horizontal directions.

[0064] 8C, when the mounting member 120 is attached to the lower case 72, the first engagement portion 132 comes into contact with the inner wall surface of the widened portion 116 in the front-rear direction. This limits the positional deviation of the mounting member 120 in the front-rear direction. In this way, the mounting member 120 and the motor 14 are positioned in the front-rear direction, left-right direction, and up-down direction.

[0065] 2, after the intermediate gear 113 and the output gear 115 are attached to the lower case 72, the upper case 54 is placed on the lower case 72. Then, with the protrusion 96 engaged with the periphery of the hole 64 and the protrusion 101 (FIG. 4) engaged with the periphery of the hole 66, the upper case 54 and the lower case 72 are fastened together with screws (not shown). This completes the motor unit 10.

[0066] In the motor unit 10, when the rotary shaft 28 of the motor 14 rotates, the worm 118A rotates. The rotation of the worm 118A is then transmitted to the intermediate gear 113 and the output gear 115. As a result, the rotation speed of the output gear 115 is reduced relative to the rotation speed of the rotary shaft 28. The rotational force of the output gear 115 is transmitted to a mechanism (not shown).

[0067] As described above, in the motor unit 10, the four first engagement portions 132 of the mounting member 120 engage with the four engaged portions 42 provided on the motor 14 in the left-right direction. The two second engagement portions 136 of the mounting member 120 are provided on (attached to) the lower case 72. The mounting member 120, together with the lower case 72, sandwiches the bearing portion 23 in the up-down direction. As a result, the movement of the motor 14 in the left-right and up-down directions is limited by the four first engagement portions 132, and the movement in the front-rear direction is limited by the lower case 72 and the mounting member 120. In other words, in the motor unit 10, the motor 14 can be positioned in the front-rear, left-right, and up-down directions.

[0068] Furthermore, in the motor unit 10, the motor 14 can be attached to the lower case 72 without using screws, eliminating the need to control the screw tightening torque. This means that the number of steps required to attach the motor 14 to the lower case 72 is reduced compared to when screws are used, and the task of attaching the motor 14 to the lower case 72 can be performed easily.

[0069] In the motor unit 10, screws are not required to attach the motor 14 to the lower case 72, and therefore the arrangement of the detected member 118 and the like in the lower case 72 is not restricted by screws. Also, because the lower case 72 and the attachment member 120 are separate bodies, the structure of the lower case is simplified, and the mold structure for the lower case 72 can be simplified. Furthermore, because the lower case 72 is less likely to deform when the motor 14 is attached, the lower case 72 can be formed from a high-strength material.

[0070] In the motor unit 10, the holes of the four engaged portions 42 are covered in the left-right direction by the four first engaging portions 132, so that the intrusion of dust and the like into the interior of the motor 14 can be suppressed.

[0071] 3, in the motor unit 10, four engaged portions 42 and four first engaging portions 132 are provided at intervals in the left-right and up-down directions. As a result, movement of the motor 14 itself in the rotational direction relative to the center of rotation (central axis C) of the rotating shaft 28 is limited by engagement between the four first engaging portions 132 and the four engaged portions 42, making it possible to suppress displacement of the motor 14 in the rotational direction of the rotating shaft 28.

[0072] In motor unit 10, engaged portions 42 provided on motor case 16 have positioning portions 44. Positioning portions 44 come into contact with the ends of magnets 31, 32, thereby positioning magnets 31, 32 within motor case 16. In other words, because magnets 31, 32 can be positioned by engaged portions 42, there is no need to prepare positioning tools or jigs when attaching magnets 31, 32 to motor case 16.

[0073] 2, in the motor unit 10, the front-to-rear direction in which the first engagement portion 132 extends intersects with the up-to-down direction in which the second engagement portion 136 extends. Therefore, when either the first engagement portion 132 or the second engagement portion 136 is elastically deformed to engage, the other is less likely to elastically deform in conjunction with the first engagement portion 132 than in a configuration in which the first engagement portion 132 and the second engagement portion 136 extend in the same direction. This makes it possible to prevent the engagement state of the first engagement portion 132 from changing when engaging the second engagement portion 136, for example.

[0074] The motor unit 10 uses a mounting member 120 that is integrally configured with the insertion portion 122, four first engagement portions 132, and two second engagement portions 136. This reduces positional errors of each portion compared to a configuration in which the insertion portion 122, the first engagement portions 132, and the second engagement portions 136 are each separate.

[0075] 7A, first arm 133 extends in the front-rear direction, while second arm 137 extends in the up-down direction. Therefore, when first arm 133 or second arm 137 elastically deforms, interference between first arm 133 and second arm 137 can be prevented. Furthermore, because first protrusion 134 is provided on first arm 133, a required amount of left-right displacement of first protrusion 134 can be ensured even if first protrusion 134 itself does not elastically deform. Similarly, because second protrusion 138 is provided on second arm 137, a required amount of left-right displacement of second protrusion 138 can be ensured.

[0076] As shown in FIG. 7B , the four first protrusions 134 protrude toward the motor 14 ( FIG. 2 ) in the left-right direction (inward), while the two second protrusions 138 protrude toward the motor 14 in the left-right direction (outward). Therefore, when the two second protrusions 138 are inserted into the two insertion holes 108 ( FIG. 10 ) after the four first protrusions 134 engage with the four engaged portions 42 ( FIG. 3 ), an external force acts on the two second protrusions 138 inward in the left-right direction. In other words, before the second protrusions 138 engage with the periphery of the insertion hole 108, a force is unlikely to act on the four first protrusions 134 in a direction that would disengage them from the four engaged portions 42. This eliminates the need to check the engagement state between the four first protrusions 134 and the four engaged portions 42 when engaging the two second protrusions 138 with the periphery of the two insertion holes 108.

[0077] 7A, end surface 122A, end surface 133A, and end surface 137A are located on the same imaginary plane M. As a result, compared to a configuration in which one of the end surfaces protrudes in the left / right direction to form a step, when mounting member 120 is inserted into housing portion 102 (FIG. 2), a gap is less likely to be formed between lower case 72 (FIG. 2) and mounting member 120. In other words, it is possible to prevent dust and the like from entering the inside of housing portion 102.

[0078] As shown in Figure 10, in the motor unit 10, almost the entire outer periphery of the bearing portion 23 is sandwiched between the support portion 106 of the lower case 72 and the curved surface 129 of the mounting member 120, thereby preventing the motor 14 from shifting radially from the rotating shaft 28.

[0079] [Configurations of the second embodiment] A motor unit 140 according to the second embodiment is shown in Fig. 11. Note that the same components as those in the first embodiment are denoted by the same reference numerals as those used in the first embodiment, and the description thereof will be omitted.

[0080] The motor unit 140 includes a motor section 12 and a speed reduction mechanism section 142. The speed reduction mechanism section 142 reduces the rotation speed of a rotary shaft 28 (FIG. 12) of the motor section 12 and transmits the rotation to an output gear 115 (FIG. 12).

[0081] 12, the speed reduction mechanism 142 has a case 144, a detected member 118, and four rear engagement portions 172. In other words, the motor unit 140 has the motor 14, four engagement portions 42, the case 144, and four rear engagement portions 172. Furthermore, the motor unit 140 has a photointerrupter (not shown), an intermediate gear 113, and an output gear 115.

[0082] <Case> The case part 144 has an upper case 146 and a lower case 154. The case part 144 houses the rotary shaft 28 and supports the motor 14 from one side in the up-down direction (the lower side). The lower case 154 is an example of a case.

[0083] <<Upper case>> The upper case 146 has an upper wall portion 147, a front wall portion 148, a rear wall portion 149, a left wall portion 151, and a right wall portion 152. In other words, the upper case 146 has a hollow portion that opens downward. A vertical wall 153 along the left-right and up-down directions is provided in the hollow portion of the upper case 146. The dimension of the upper case 146 in the front-to-rear direction is greater than the dimension in the left-to-right direction. A through hole 67A and a through hole 67B are formed in the upper case 146.

[0084] A notch 62 is formed in the rear wall 149. A plate 63 is provided in front of the center of the left wall 151 in the front-to-rear direction. A plate 65 is provided in the right wall 152 in the rear of the center of the right wall 152 in the front-to-rear direction.

[0085] <<Lower case>> The lower case 154 has a bottom wall 155, a front wall 88, a protruding portion 89, a rear wall 156, a left wall 157, and a right wall 158. The lower case 154 also has a storage portion 162 that opens upward. The front-to-rear dimension of the lower case 154 is greater than the left-to-right dimension. The front-to-rear and left-to-right dimensions of the lower case 154 are also approximately the same as the front-to-rear and left-to-right dimensions of the upper case 146. The lower case 154 is formed with a screw hole 91A and a screw hole 91B.

[0086] The rear wall portion 156 is made up of a rear wall 164 located above the center in the up-down direction, and a base portion 166 located below the center in the up-down direction. The base portion 166 extends rearward beyond the rear wall 164. A cutout portion 93 is formed in the base portion 166. A flat portion 167 is formed on the base portion 166 on the left-right outer side of the cutout portion 93. The flat portion 167 is made up of a flat surface that extends along the front-rear and left-right directions. A recessed portion 95 is provided in the left wall portion 157 forward of the center in the front-rear direction. A protrusion 96 is provided in the recessed portion 95.

[0087] As shown in FIG. 13, a recess 99 is provided rearward of the center in the front-to-rear direction of the right wall portion 158. A protrusion 101 is provided in the recess 99. A support portion 106 is provided on the rear wall 164. The storage portion 162 stores the intermediate gear 113, the front portion of the rotating shaft 28, and the detected member 118 (FIG. 12). The storage portion 162 also has a shaft portion 111. The intermediate gear 113 transmits the rotational force transmitted from the detected member 118 to the output gear 115. The rotational force transmitted to the output gear 115 is transmitted to a mechanism (not shown).

[0088] <Rear engagement part> As shown in FIG. 14A, four rear engagement portions 172 are provided on the rear wall 164 (lower case 154). The rear engagement portions 172 are an example of engagement portions. The four rear engagement portions 172 are positioned at intervals in the left-right and up-down directions. The four rear engagement portions 172 extend rearward from the rear wall 164. Each of the four rear engagement portions 172 is elastically deformable in the left-right direction, and engages with the four engaged portions 42 (FIG. 12). In the following description, when there is no need to distinguish between the four rear engagement portions 172, they will simply be referred to as "rear engagement portions 172."

[0089] The rear engagement portion 172 has an arm 174 extending in the front-rear direction, and a protrusion 176 protruding inward in the left-right direction from the rear end of the arm 174. The arm 174 is elastic.

[0090] 14B, the left protrusion 176 protrudes to the right, and the right protrusion 176 protrudes to the left. In other words, the four protrusions 176 each protrude inward in the left-right direction.

[0091] [Functions of each configuration of the second embodiment] The following describes an example of the assembly procedure for the motor unit 140. Note that the assembly procedure and operation similar to those of the motor unit 10 (FIG. 1) will generally be omitted from the description.

[0092] 15A, the detected member 118 is attached to the rotary shaft 28. The motor 14 is placed on the notch 93 so that the four engaged portions 42 are positioned rearward of the four rear engaging portions 172. Specifically, the front end of the motor 14 is placed on the notch 93.

[0093] As shown in Fig. 15B, motor 14 slides forward. At this time, four protrusions 176 (Fig. 14B) come into contact with first side walls 17, 18, causing four arms 174 to spread out in the left-right direction. Motor 14 then continues to slide forward.

[0094] As shown in Fig. 15C, the front surface of motor 14 contacts the rear surface of rear wall 164. Bearing portion 23 is supported by support portion 106. Detectable member 118 is housed in housing portion 162. Four rear engaging portions 172 engage with four engaged portions 42 (Fig. 15B).

[0095] 16, when the four protrusions 176 reach a position facing the four engaged portions 42, the four protrusions 176 receive an elastic force (restoring force) from the arm 174 and enter the four engaged portions 42. The four protrusions 176 then engage with the four engaged portions 42. In this way, the motor 14 is attached to the lower case 154.

[0096] As shown in FIG. 12, when the upper case 146 is attached to the lower case 154, the bearing portion 23 (FIG. 13) is supported by the support portion 106 and receives a downward pressing force from the vertical wall 153 of the upper case 146. In other words, the bearing portion 23 is sandwiched in the vertical direction between the support portion 106 and the vertical wall 153. Furthermore, the bearing portion 23 is sandwiched in the horizontal direction by the rear wall 164. This positions the motor 14 in the vertical and horizontal directions. Furthermore, the motor 14 is positioned in the front-rear direction by the engagement between the four rear engagement portions 172 and the four engaged portions 42. Here, the upper case 146 and the lower case 154 are fastened together with screws (not shown). This completes the motor unit 140.

[0097] In the motor unit 140, when the rotary shaft 28 of the motor 14 rotates, the worm 118A rotates together with the rotary shaft 28. The rotation of the worm 118A is then transmitted to the intermediate gear 113 and the output gear 115. As a result, the rotation speed of the output gear 115 is reduced relative to the rotation speed of the rotary shaft 28.

[0098] As described above, in the motor unit 140, the four rear engaging portions 172, which are elastically deformable in the left-right direction, are engaged in the left-right direction with the four engaged portions 42 provided on the motor 14. Furthermore, the lower case 154 supports the motor 14 from below in the up-down direction and limits the movement of the motor 14 in the front-to-rear direction. In this way, the motor 14 can be attached to the lower case 154 without using screws, eliminating the need to manage the screw tightening torque.

[0099] Furthermore, movement of the motor 14 in the front-rear, left-right, and up-down directions is restricted by contact between the four rear engagement portions 172 and the lower case 154. In other words, the motor unit 140 allows the motor 14 to be positioned in the front-rear, left-right, and up-down directions. In this way, the motor unit 140 reduces the number of steps required to attach the motor 14 to the lower case 154 compared to using screws, and also simplifies the task of attaching the motor 14 to the lower case 154.

[0100] Furthermore, in the motor unit 140, the four engaged portions 42 and the four rear engaging portions 172 are provided at intervals in the left-right and up-down directions. As a result, movement of the motor 14 itself in the rotational direction relative to the rotation center of the rotary shaft 28 is limited by engagement between the four rear engaging portions 172 and the four engaged portions 42, making it possible to suppress displacement of the motor 14 in the rotational direction of the rotary shaft 28.

[0101] [Modification] The present invention is not limited to either the first or second embodiment, and it goes without saying that various modifications are possible, such as combinations, without departing from the spirit of the invention.

[0102] The four engaged portions 42 and the four first engaging portions 132 or the four rear engaging portions 172 do not have to be spaced apart in the left-right and up-down directions. Furthermore, the number of engaged portions 42, the number of first engaging portions 132, and the number of rear engaging portions 172 are not limited to four, and may be six or more.

[0103] The four engaged portions 42 and the four first engaging portions 132 or the four rear engaging portions 172 do not have to be provided symmetrically with respect to the rotation shaft 28 of the motor 14. For example, an asymmetric configuration is possible in which there are an odd number of engaged portions 42 and first engaging portions 132 or rear engaging portions 172 on one side in the left-right direction, and an even number of engaged portions 42 and first engaging portions 132 or rear engaging portions 172 on the other side in the left-right direction. The number of second engaging portions 136 is not limited to two, and may be three or more.

[0104] The engaged portion 42 does not necessarily have to have the positioning portion 44 for positioning the magnets 31 and 32 .

[0105] In the motor unit 10, the insertion portion 122, the four first engagement portions 132, and the two second engagement portions 136 may each be configured as separate members. In this case, they may be assembled as the mounting member 120 in advance before assembling the motor unit 10.

[0106] First arm 133 may extend in an oblique direction intersecting the front-rear direction. Similarly, second arm 137 may extend in an oblique direction intersecting the up-down direction. End surface 122A, end surface 133A, and end surface 137A do not have to be located on the same imaginary plane M.

[0107] The four first engaging portions 132 may have different sizes between the upper two (one set) of first engaging portions 132 and the lower two (one set) of first engaging portions 132. Similarly, the four engaged portions 42 may have different sizes between the upper and lower sides.

[0108] The present disclosure can be configured as follows. (1) a motor having a rotation shaft extending in a first direction; a plurality of engaged portions provided on the motor and positioned at intervals in a second direction intersecting the first direction; a case that houses the rotating shaft and supports the motor from one side in a third direction that intersects both the first direction and the second direction; a plurality of engaging portions provided on the case, the engaging portions being elastically deformable in the second direction and engaging with the plurality of engaged portions; A motor unit having: (2) The plurality of engaged portions and the plurality of engaging portions are respectively provided at intervals in the second direction and the third direction. The motor unit according to (1) above. (3) the motor includes a cylindrical motor case and a magnet housed in the motor case, the plurality of engaged portions are recessed toward the inside of the motor case and position the magnet; The motor unit according to (2) above. (4) an insertion portion that is inserted into the case along the third direction; a plurality of other engaging portions extending from the insertion portion in the third direction, elastically deforming in the second direction, and engaging with the case; and the plurality of engagement portions extend from the insertion portion in the first direction and are elastically deformable in the second direction; The motor unit according to any one of (1) to (3). (5) an attachment member in which the insertion portion, the plurality of engagement portions, and the plurality of other engagement portions are integrally formed; The motor unit according to (4) above. (6) the plurality of engaging portions include a plurality of first arms extending in the first direction and a plurality of first protrusions protruding from the plurality of first arms in the second direction, the plurality of other engagement portions include a plurality of second arms extending in the third direction and a plurality of second protrusions protruding in the second direction from the plurality of second arms, the plurality of first protrusions protrude inward in the second direction, The plurality of second protrusions protrude outward in the second direction. The motor unit according to (4) or (5). (7) an end surface of the insertion portion on one side in the second direction, an end surface of the first arm on one side in the second direction, and an end surface of the second arm on one side in the second direction are located on the same imaginary plane; The motor unit according to (6) above. (8) a bearing portion that supports the rotary shaft of the motor is sandwiched between the case and the insertion portion; The motor unit according to any one of (4) to (7). [Explanation of symbols]

[0109] 10: motor unit, 12: motor section, 14: motor, 16: motor case, 17: first side wall, 18: first side wall, 19: second side wall, 21: second side wall, 22: front wall, 23: bearing section, 23A: through hole, 24: rear wall, 25: bearing section, 26: terminal section, 28: rotating shaft, 31: magnet, 32: magnet, 34: rotor, 36: coil, 42: engaged section, 44: positioning section, 50: reduction mechanism section, 52: case section, 54: upper case, 55: upper wall section, 56: front wall section, 57: rear wall section, 58: left wall section, 59: right wall section, 61: opening section, 62: notch section, 63: plate section, 64: Hole, 65: plate, 66: hole, 67A: through hole, 67B: through hole, 72: lower case, 73: bottom wall, 74: central bottom, 75: bottom, 75A: opening, 76: front bottom, 77: bottom, 78: rear bottom, 79: rear bottom, 81: photointerrupter, 81B: photointerrupter, 83: bottom, 84: bottom, 85: left side notch, 86: right side notch, 88: front wall, 89: protrusion, 91A: screw hole, 91B: screw hole, 92: rear wall, 93: notch, 94: left wall, 95: recess, 96: protrusion, 98: right wall, 99: recess, 101: protrusion, 102: housing portion, 102A: first accommodating portion, 102B: second accommodating portion, 103: photointerrupter, 104A: intermediate wall, 104B: intermediate wall, 105A: rear surface, 105B: rear surface, 106: support portion, 107: side surface, 108: insertion hole, 111: shaft portion, 113: intermediate gear, 115: output gear, 116: widening portion, 118: detected member, 118A: worm, 118B: light shielding plate, 119: shaft hole, 120: mounting member, 122: insertion portion, 122A: end surface, 124: flat plate portion, 126: columnar portion, 127: columnar portion, 128: notch portion, 129: curved surface, 132: first engaging portion, 133: first arm, 133A: end surface, 134: first protrusion, 136: second engagement portion, 137: second arm, 137A: end surface, 138: second protrusion, 140: motor unit, 142: speed reduction mechanism portion, 144: case portion, 146: upper case, 147: upper wall portion, 148: front wall portion, 149: rear wall portion, 151: left wall portion, 152: right wall portion, 153: vertical wall, 154: lower case, 155: bottom wall portion, 156: rear wall portion, 157: left wall portion, 158: right wall portion, 162: storage portion, 164: rear wall, 166: base portion, 167: flat portion, 172: rear engagement portion, 174: arm, 176: protrusion, C: central axis, M: imaginary plane

Claims

1. a motor having a rotation shaft extending in a first direction; a plurality of engaged portions provided on the motor and positioned at intervals in a second direction intersecting the first direction; a case that houses the rotating shaft and supports the motor from one side in a third direction that intersects both the first direction and the second direction; a plurality of engaging portions provided on the case, the engaging portions being elastically deformable in the second direction and engaging with the plurality of engaged portions; A motor unit having:

2. the plurality of engaged portions and the plurality of engaging portions are respectively provided at intervals in the second direction and the third direction; The motor unit according to claim 1 .

3. the motor includes a cylindrical motor case and a magnet housed in the motor case, the plurality of engaged portions are recessed toward the inside of the motor case and position the magnet; The motor unit according to claim 2 .

4. an insertion portion that is inserted into the case along the third direction; a plurality of other engaging portions extending from the insertion portion in the third direction, elastically deforming in the second direction, and engaging with the case; and the plurality of engagement portions extend from the insertion portion in the first direction and are elastically deformable in the second direction; The motor unit according to claim 1 .

5. an attachment member in which the insertion portion, the plurality of engagement portions, and the plurality of other engagement portions are integrally formed; The motor unit according to claim 4.

6. the plurality of engaging portions include a plurality of first arms extending in the first direction and a plurality of first protrusions protruding in the second direction from the plurality of first arms, the plurality of other engaging portions include a plurality of second arms extending in the third direction and a plurality of second protrusions protruding in the second direction from the plurality of second arms, the plurality of first protrusions protrude inward in the second direction, The plurality of second protrusions protrude outward in the second direction. The motor unit according to claim 5 .

7. an end surface of the insertion portion on one side in the second direction, an end surface of the first arm on one side in the second direction, and an end surface of the second arm on one side in the second direction are located on the same imaginary plane; The motor unit according to claim 6.

8. a bearing portion that supports the rotary shaft of the motor is sandwiched between the case and the insertion portion; The motor unit according to claim 4.

Images