motor

Abstract

The present invention relates to a motor, which comprises: a motor body having a bottom and a motor terminal (26) arranged at the bottom; and a terminal unit (200) installed at the bottom of the motor body. The terminal unit (200) comprises: a bracket (210); a PTC thermistor (180) and a terminal portion (330b) fixed to the bracket (210); and a wiring portion for electrically connecting the motor terminal (26) and the terminal portion (330b). The PTC thermistor (180) is arranged in the wiring portion. In the radial direction, the terminal portion (330b) and the PTC thermistor (180) are arranged opposite to each other.

Description

Technical Field

[0001] The present invention relates to a motor, and more particularly to a motor having a terminal unit having terminals for supplying power to the motor. Background Art

[0002] Electronic components such as circuit elements are often provided in the power supply line of the motor. For example, in order to prevent overheating of the coil of the motor, a PTC (Positive Temperature Coefficient) thermistor is often arranged in the power supply line of the motor.

[0003] For example, the structure of a DC motor provided with a PTC thermistor is described in Patent Document 1 listed below. In the motor described in Patent Document 1, a hole is opened in a bottom plate of the motor, and the PTC thermistor is arranged so as to pass through the hole.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2009-165209

[0005] The structure shown in the above-mentioned Patent Document 1 is a complicated structure. Summary of the invention

[0006] The present invention takes the above-mentioned contents as an example of a subject, and an object of the present invention is to provide a motor in which electronic components can be arranged on a power supply line of the motor.

[0007] A motor involved in one embodiment of the present invention comprises: a motor body having a bottom and a motor terminal arranged at the bottom; and a terminal unit installed at the bottom of the motor body, the terminal unit comprising: a bracket; an electronic component and a terminal portion fixed to the bracket; and a wiring portion electrically connecting the motor terminal and the terminal portion, the electronic component being arranged in the wiring portion, and the terminal portion and the electronic component being arranged relative to each other in the radial direction.

[0008] According to one aspect of the present invention, it is possible to provide a motor in which electronic components can be arranged on a power supply line of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a cross-sectional view showing a motor using a terminal unit according to one embodiment of the present invention.

[0010] Figure 2 Yes means Figure 1 Cross-sectional view along line AA.

[0011] Figure 3 It is a perspective view showing a bracket and a plate.

[0012] Figure 4 This is a perspective view showing the motor terminals.

[0013] Figure 5 This is an exploded perspective view showing a structure including a bracket and a plate.

[0014] Figure 6 This is a three-dimensional diagram showing a PTC thermistor.

[0015] Figure 7 This is a perspective view showing a terminal unit.

[0016] Figure 8 It is a first exploded perspective view showing the terminal unit.

[0017] Fig. 9 It is a second exploded perspective view showing the terminal unit.

[0018] Fig.10 This is a top view showing the terminal unit.

[0019] Fig.11 It is a perspective view showing the upper terminal member in a state of being fixed to the bracket.

[0020] Fig.12 yes Fig.10 Cross-sectional view of line DD.

[0021] Fig.13 It is a plan view showing a terminal unit of a motor according to a second embodiment.

[0022] Fig.14 This is a side view showing the terminal unit.

[0023] Fig.15 It is a top view showing the terminal unit in a state where external terminals are connected.

[0024] Fig.16 yes Fig.13 Cross-sectional view of line DD.

[0025] Fig.17 This is a diagram for explaining the connection between the motor body and the terminal unit in the second embodiment.

[0026] Fig.18 It is a diagram for explaining a modified example of the connection between the motor body and the terminal unit in the second embodiment.

[0027] Fig.19 It is a plan view showing a terminal unit according to a modified example of the second embodiment. DETAILED DESCRIPTION

[0028] Hereinafter, a motor using the terminal unit according to the embodiment of the present invention will be described.

[0029] In the following description, the direction parallel to the motor's rotation axis is often referred to as the rotation axis direction. In addition, the rotation axis direction is often referred to as the up-down direction (the direction in which the rotation axis protrudes when viewed from the motor frame is the up direction). The "up-down", "up", "down", etc. mentioned here are expressions used for the sake of convenience when focusing only on the motor, and there is no limitation on the direction of the device equipped with the motor or the posture of using the motor.

[0030] [First embodiment]

[0031] Figure 1 This is a cross-sectional view showing a motor using the terminal unit according to the first embodiment of the present invention.

[0032] Figure 1 The cross section shown is described later. Figure 2 In the following figures, arrow A1 indicates the direction of the rotation axis. In arrow A1, the direction of the arrow tip is upward.

[0033] The motor 1 is, for example, a DC motor. The motor 1 generally includes a motor body 1c and a terminal unit 100. The motor body 1c has a frame assembly 1a and a rotor that can rotate relative to the frame assembly 1a. The rotor is composed of a rotating shaft (shaft) 2 and an armature assembly 1b. The terminal unit 100 is, for example, mounted on the bottom (lower part) of the motor body 1c for use.

[0034] The armature assembly 1b is mounted on the rotating shaft 2, and includes an armature part 4 and a commutator part 6. The armature part 4 includes an armature core 5 having a plurality of salient poles protruding in the radial direction, and a winding (not shown) wound around each salient pole. The commutator part 6 is provided near one end of the rotating shaft 2. The commutator part 6 includes a brush 25 provided on the frame assembly 1a, a commutator 7 in contact with the brush 25, and the like.

[0035] The frame assembly 1a is composed of a frame 10, a bracket 30, a plate 40, a magnet 50, etc. The plate 40 has a surface 40a facing the bracket 30 and a surface 40b facing the terminal unit 100 (see Figure 5 ).

[0036] The frame 10 has an upper end 10a (also referred to as one end, outer peripheral end 10a) forming a cover, and a lower end 10b (also referred to as the other end, outer peripheral end 10b), and has a cylindrical shape covered by a cover having a surface. Figure 1 The opening of the frame 10 (the right end in the figure) is closed by the plate 40. The armature assembly 1b is accommodated in the housing composed of the frame 10 and the plate 40.

[0037] The bracket 30 is attached to the inner side of the plate 40. The bracket 30 holds the motor terminal 26 for supplying electric current from the outside. The motor terminal 26 is connected to the brush 25. The brush 25 is held so as to be in contact with the commutator 7.

[0038] The rotating shaft 2 passes through the cover portion (upper surface) of the frame 10. That is, the upper end portion (one end portion) of the rotating shaft 2 protrudes from the inside of the frame 10 to the outside, and the other portion of the rotating shaft 2 is accommodated inside the frame 10. The bearing 21 is held in the center portion of the upper surface of the frame 10. In addition, the bearing 22 is held in the center portion of the plate 40. A thrust washer 23 is arranged below the bearing 22. The rotating shaft 2 is supported so as to be rotatable relative to the frame 10 by the bearings 21 and 22 at two locations and the thrust washer 23.

[0039] Figure 2 yes Figure 1 Cross-sectional view along line AA.

[0040] like Figure 2 As shown, in this embodiment, a cylindrical magnet 50 is provided. The magnet 50 is arranged inside the frame 10. The frame assembly 1a has a cross-sectional structure in which the outer peripheral surface 50a of the magnet 50 is surrounded by the frame 10. The outer peripheral surface of the frame 10 becomes the outer peripheral surface of the motor body 1c. In addition, a plurality of magnets each having a magnetic pole element may be used.

[0041] The frame 10 is formed using a magnetic body. The frame 10 has a plurality of corners 12 and a face portion (plane portion) 11 located between two adjacent corners 12. Specifically, the frame 10 has an outer shape having four plane portions 11 and four corners 12, respectively. Two plane portions 11 adjacent in the circumferential direction are connected to each other via a corner 12. One of the two plane portions 11 adjacent in the circumferential direction is approximately perpendicular to the other. The corner 12 has a shape with rounded corners (arc shape). The frame 10 is approximately square in a cross section perpendicular to the rotation axis 2. The frame 10 is formed in a square shape as a whole.

[0042] The frame 10 has a substantially uniform thickness. That is, the inner peripheral surface 10 b of the frame 10 is formed by connecting a plurality of flat portions based on the plane portion 11 and a plurality of rounded portions based on the corner portion 12 , and is formed in a square shape.

[0043] The magnet 50 is, for example, a bonded magnet formed using a known ferrite material or a rare earth material such as neodymium or samarium and a known resin material. The magnet 50 is not limited to a bonded magnet, and may be, for example, a sintered magnet.

[0044] The magnet 50 has magnetic pole elements 61 (N pole 61a, S pole 61b, N pole 61c, S pole 61d). That is, the magnet 50 has the same number of magnetic pole elements 61 as the number of corners 12 of the motor body 1c. The magnetic pole elements 61 are arranged so that the polarities are different from each other in the circumferential direction. The four magnetic pole elements 61 are arranged at the four corners 12 of the frame 10 so that the magnetic pole elements 61 are opposite to each other. That is, the switching parts of the four magnetic pole elements 61 are respectively located at positions overlapping with the planar part 11 of the frame 10 in the radial direction.

[0045] The magnet 50 has an outer peripheral surface 50a having a rounded shape along the inner peripheral surface 10b of the frame 10 at the corner 12. The magnet 50 also has a cylindrical inner peripheral surface 50b. A small air gap is provided between the inner peripheral surface 50b of the magnet 50 and the armature core 5.

[0046] In the present embodiment, the magnet 50 is bonded to the inner peripheral surface 10b of the frame 10 by an adhesive (not shown). The magnet 50 is received inside the frame 10 from the opening portion on the lower side of the frame 10 and bonded to the inner peripheral surface 10b of the frame 10. Then, the armature assembly 1b is received inside the frame 10 and the bracket 30 and the plate 40 are mounted on the frame 10, thereby assembling the motor body 1c.

[0047] Figure 3 It is a perspective view showing the bracket 30 and the plate 40 .

[0048] exist Figure 3 , the upper side of the bracket 30 and the plate 40 are shown. Figure 3 As shown, two motor terminals 26 are mounted on the bracket 30. One end of each brush 25 is connected to the motor terminal 26. Thus, the two brushes 25 are supported by the motor terminal 26. The other end of each brush 25 contacts the commutator 7 of the armature assembly 1b.

[0049] The bracket 30 is formed of, for example, a resin component. The bracket 30 has a thickness in the direction of the rotating shaft. The bracket 30 has a cylindrical portion having an opening 35 through which the rotating shaft 2 passes. In the present embodiment, the bracket 30 is a cylindrical portion having an opening 35 in the center. The brush 25 is arranged in the opening 35. In addition, the rotating shaft 2 passes through the opening 35. The bracket 30 has an outer peripheral surface 30a in a shape closed by an annular shape. That is, the cylindrical portion has an outer peripheral surface 30a.

[0050] When viewed from the rotation axis direction (when viewed from above), the outer peripheral surface 30a of the cylinder has substantially the same shape as the inner peripheral surface 10b of the frame 10. That is, the bracket 30 has four corners 32 and a flat surface 31 provided between two adjacent corners 32. The outer peripheral surface 30a of the cylinder is provided at the four corners 32 and the four flat surfaces. Figure 1As shown, in the rotation axis direction, the outer peripheral surface 30a of the bracket 30 extends toward the magnet 50. The length of the bracket 30 in the rotation axis direction is, for example, slightly larger than the dimension of the brush 25 in the rotation axis direction. The brush 25 is accommodated inside the opening 35. When the bracket 30 is mounted on the frame 10, the outer peripheral surface 30a of the bracket 30 contacts the inner peripheral surface 10b of the frame 10.

[0051] Figure 4 It is a perspective view showing the motor terminal 26 .

[0052] like Figure 4 As shown, the motor terminal 26 has a brush fixing portion 26a for fixing the brush 25, a holding portion 26b held by the bracket 30, and a terminal piece 26c extending downward from the holding portion 26b (extending in a direction intersecting the extending direction of the holding portion 26b). The motor terminal 26 is made of a metal plate. A serrated protrusion (hereinafter referred to as an anti-slip protrusion) 26d protruding laterally is provided at a portion near the holding portion 26b in the side edge of the terminal piece 26c.

[0053] A hole 26e is formed in a terminal piece 26c which is a part of a motor terminal. Instead of the hole 26e, an engaged portion having a certain shape of projections and depressions may be provided.

[0054] Figure 5 It is an exploded perspective view showing a structure including the bracket 30 and the plate 40 .

[0055] exist Figure 5 In FIG. 1 , only one set of brushes 25 and motor terminals 26 are shown. Figure 5 As shown, the motor terminal 26 with the brush 25 mounted thereon is inserted downward from the upper side of the bracket 30, so that the holding portion 26b is held by the bracket 30. At this time, the anti-drop protrusion 26d is caught on a part of the bracket 30, so that the motor terminal 26 does not drop from the bracket 30.

[0056] The terminal piece 26c protrudes from the bracket 30 toward the plate 40 (downward). The terminal piece 26c passes through a terminal hole 42 formed in the plate 40 and protrudes downward from the plate 40. That is, the terminal piece 26c protrudes downward from the bottom of the motor body 1c.

[0057] In this embodiment, in addition to the terminal hole 42, the plate 40 is provided with a hole 43. A protrusion (not shown) formed on the lower surface of the bracket 30 fits into the hole 43. As described later, a fastening member is attached to the hole 43.

[0058] Figure 6 It is a perspective view showing the PTC thermistor 180 .

[0059] The terminal unit 100 is equipped with a PTC thermistor 180 as an electronic component. Figure 6 As shown, the PTC thermistor 180 is in the form of a flat plate. The PTC thermistor 180 is, for example, a single plate type. That is, the PTC thermistor 180 has two faces with larger areas than the other faces. In other words, the PTC thermistor 180 has an upper surface and a lower surface with larger areas than the other side faces, and has a cubic shape. The PTC thermistor 180 is formed by sandwiching two faces (upper surface and lower surface) of a single plate-shaped core 181 by electrode plates 182, respectively. The electrode plates 182 form two faces of the PTC thermistor 180.

[0060] In addition, the PTC thermistor 180 may be in the form of a laminated plate in which a plurality of cores are laminated, for example.

[0061] Figure 7 It is a perspective view showing the terminal unit 100 . Figure 8 1 is a first exploded perspective view showing the terminal unit 100 . Fig. 9 1 is a second exploded perspective view showing the terminal unit 100 . Fig.10 1 is a plan view showing the terminal unit 100 .

[0062] exist Figure 7 , Figure 8 as well as Fig. 9 , a diagram showing the terminal unit 100 as viewed from above is shown.

[0063] like Figure 7 As shown, the terminal unit 100 has a bracket 110, an upper terminal part 133, a lower terminal part 135, a third terminal part 131, and a PTC thermistor 180. The bracket 110 has an outer peripheral end 110a that is opposite to the outer peripheral end 10b of the frame 10 in the axial direction of the motor 1. The outer peripheral end 110a of the bracket 110 has: a surface 110b that is opposite to the outer peripheral end 10b of the frame 10 in the axial direction of the motor 1; and a plurality of protrusions 110c that protrude from the surface 110b to the plate 40 that becomes the bottom of the motor body 1c in the axial direction of the motor 1. These protrusions 110c are opposite to the plate 40 that becomes the bottom of the motor body 1c, and are in contact with the inner surface of the outer peripheral end 10b of the frame 10. The terminal unit 100 is positioned (guided) relative to the frame 10 by the protrusions 110c.

[0064] The bracket 110 is made of resin, for example. The upper terminal member 133 , the lower terminal member 135 , the third terminal member 131 , and the PTC thermistor 180 are mounted on the bracket 110 .

[0065] The outer peripheral surface of the bracket 110 has four corner portions 102 and a flat surface portion 101 provided between two adjacent corner portions 102 , for example, similarly to the frame 10 of the motor body 1 c .

[0066] like Figure 8 As shown, the bracket 110 is formed with an opening portion (hereinafter referred to as the upper insertion portion) 113 for inserting the upper terminal, an opening portion (hereinafter referred to as the lower insertion portion) 115 for inserting the lower terminal, and an opening portion (hereinafter referred to as the third terminal insertion portion) 111 for inserting the third terminal. The respective opening portions (hereinafter collectively referred to as the insertion portion) 113, 115 and the third terminal insertion portion 111 are formed. Each insertion portion 113, 115, 111 has a groove shape into which the corresponding terminal member 133, 135, 131 can be inserted from the upper side of the bracket 110 (that is, the inner side of the bracket 110). The respective insertion portions 113, 115, 111 are formed with hook-shaped claws 113a, 115b, 111a, 111b that are hooked on the upper end of the inserted terminal member 133, 135, 131. Since the claws 113 a , 115 b , 111 a , 111 b are hooked on the upper ends of the terminal members 133 , 135 , 131 , the terminal members 133 , 135 , 131 will not fall off the bracket 110 .

[0067] A hole 117 is formed in the center of the bracket 110. The hole 117 is formed on the extension line of the rotating shaft 2 of the motor body 1c. That is, the hole 117 is formed so that the center of the plate 40 of the motor body 1c can be seen from the bottom of the motor 1. Thus, for example, in the assembly process of the device using the motor 1, even in the case of a process that includes applying a downward force to the rotating shaft of the motor body 1c, the center of the plate 40 can be easily supported through the hole 117.

[0068] A recess (an example of a fixing portion) 118 extending upward from the lower surface of the bracket 110 is provided between the hole 117 and a flat portion 101. The recess 118 is formed so as to protrude upward when viewed from the inner side of the bracket 110. The upper end surface of the recess 118 is located at a position that can contact the bottom surface of the plate 40 when the bracket 110 is mounted on the motor body 1c. A hole portion 118a is formed in the upper end surface of the recess 118. In the plate 40, a hole portion 43 is provided at a position opposite to the recess 118, and the bracket 110 can be coupled to the plate 40 through the recess 118 using fastening components such as screws and nail-shaped components. In this way, the bracket 110 can be coupled to the motor body 1c.

[0069] In addition, the hole 117 and the recess 118 may not be provided. The method of combining the bracket 110 and the motor body 1c using the recess 118 may not be used. For example, as a method of attaching the bracket 110 to the motor body 1c, only a method of engaging the motor terminal 26 with the upper terminal member 133 and the third terminal member 131 as described later may be used.

[0070] The bracket 110 is provided with a housing portion 121 for housing the PTC thermistor 180. The housing portion 121 is provided, for example, next to one of the plane portions 101. As described later, the housing portion 121 is formed so that the PTC thermistor 180 in a substantially rectangular plate shape becomes substantially perpendicular to the rotation axis direction and one side surface of the PTC thermistor 180 becomes substantially parallel to one of the plane portions 101, and is arranged from above the bracket 110.

[0071] A wall 122 is formed near the housing portion 121 to face the side surface of the PTC thermistor 180 disposed in the housing portion 121. The wall 122 is formed of a resin member constituting the bracket 110. As described later, a hole 123 is formed at a position farther from the PTC thermistor 180 than the wall 122, into which the arm portions 133h and 133j of the upper terminal member 133 are inserted.

[0072] like Fig. 9 As shown, a contact protrusion 121f protruding upward is formed on the bottom surface of the housing portion 121. The contact protrusion 121f is formed to face the lower surface of the PTC thermistor 180 arranged in the housing portion 121. The contact protrusion 121f is formed to contact one portion of the lower surface of the PTC thermistor 180 arranged in the housing portion 121, which is close to the side circumferential surface.

[0073] An opening 128 that passes through the bracket 110 from top to bottom is provided on the bottom surface of the housing portion 121. The opening 128 is formed to face the surface of the PTC thermistor 180 disposed in the housing portion 121. The outside of the bracket 110 is connected to the inside of the bracket 110 via the opening 128. By forming the opening 128 in this way, the temperature of the outside air is easily transmitted to the PTC thermistor 180. Therefore, the temperature of the PTC thermistor 180 is easily increased relative to the temperature increase of the outside of the motor 1, and when the temperature of the outside of the motor 1 increases, the current can be limited in advance by the PTC thermistor 180.

[0074] like Figure 8 As shown, the PTC thermistor 180 is arranged in the housing portion 121. In this embodiment, the surface of the PTC thermistor 180 faces the direction of the rotation axis of the motor. That is, one of the two electrode plates 182 of the PTC thermistor 180 faces upward, and the other faces downward. In other words, the surface of the PTC thermistor 180 is perpendicular to the rotation axis direction, or is at an angle close to perpendicular to the rotation axis direction. The PTC thermistor 180 is not parallel to the rotation axis direction, but is arranged in a tilted posture relative to the rotation axis direction.

[0075] The third terminal member 131 is a metal plate formed by stamping or the like. The third terminal member 131 has a strip shape bent at a substantially right angle into an "L" shape. One end of the third terminal member 131 is a motor-side terminal piece 131a connected to the motor terminal 26. The other end of the third terminal member 131 is an external terminal surface 131b exposed outside the bracket 110.

[0076] The motor-side terminal piece 131a is provided with a protrusion 131d as an engaging unit. The protrusion 131d is formed in such a manner that a part of the motor-side terminal piece 131a is pressed in a direction perpendicular to the motor-side terminal piece 131a, thereby protruding from the motor-side terminal piece 131a. The protrusion 131d is formed to protrude toward the motor terminal 26 connected to the motor-side terminal piece 131a as described later. The protrusion 131d protrudes in a direction substantially perpendicular to the direction of the rotation axis.

[0077] The lower terminal member 135 is a metal plate formed by stamping or the like. The lower terminal member 135 has a shape obtained by bending a strip-shaped metal plate at two locations at approximately right angles. One end of the lower terminal member 135 is an external terminal surface 135b exposed outside the bracket 110. The other end of the lower terminal member 135 is an element-side terminal surface 135c extending toward the lower surface of the PTC thermistor 180.

[0078] The element-side terminal surface 135c is located below the PTC thermistor 180. The element-side terminal surface 135c is located at a position away from the position where the contact protrusion 121f is formed. Two contact protrusions 135f that protrude upward are formed on the element-side terminal surface 135c. Each contact protrusion 135f is formed to be opposite to the lower surface of the PTC thermistor 180 arranged in the accommodating portion 121. Each contact protrusion 135f is formed to contact one part of the lower surface of the PTC thermistor 180 arranged in the accommodating portion 121, which is close to the side peripheral surface. That is, the element-side terminal surface 135c of the lower terminal component 135 is in contact with the electrode plate 182 on the lower side of the PTC thermistor 180. Each contact protrusion 135f is arranged at a position away from the contact protrusion 121f of the bracket 110.

[0079] like Fig.10 As shown, the PTC thermistor 180 disposed in the housing portion 121 contacts three points, namely, one contact portion (contact protrusion) 121f and two contact portions (contact protrusions) 135f. When viewed from the rotation axis direction, a triangle connecting the three points contacted by the PTC thermistor 180 overlaps the center of the PTC thermistor 180.

[0080] In the present embodiment, the external terminal surface 131b of the third terminal member 131 and the external terminal surface 135b of the lower terminal member 135 are opposite to each other near a plane portion 101 different from the plane portion 101 near the PTC thermistor 180. The external terminal surfaces 131b and 135b are exposed to the outside of the bracket 110, and a voltage can be applied to the external terminal surfaces 131b and 135b from an external circuit, etc., to supply power to the motor 1.

[0081] In the present embodiment, the external terminal surfaces 131b and 135b are respectively connected to wires (not shown). The wires are connected to the external terminal surfaces 131b and 135b by methods such as soldering and resistance welding. By connecting the wires to the external power supply lines, the wiring can be performed in a manner that can drive the motor 1. In addition, the lower terminal member 135 and the third terminal member 131 may also have female terminals and male terminals that can be connected to an external circuit instead of the external terminal surfaces 131b and 135b. The female terminal, for example, only needs to be configured to be exposed on the outside of the bracket 110 in a manner that contacts the male terminal inserted into the terminal unit 100 from the outside. The male terminal, for example, only needs to be configured to protrude from the bracket 110 and be able to connect the female terminal, wire, etc. of the circuit provided outside.

[0082] The upper terminal member 133 is a metal plate formed by stamping or the like. The upper terminal member 133 includes a plate-shaped plate portion 133c covered by the upper surface of the PTC thermistor 180, and a band-shaped motor-side terminal piece 133a bent and extended from the plate portion 133c. The motor-side terminal piece 133a is connected to the motor terminal 26. The upper terminal member 133 is fixed to the bracket 110.

[0083] The motor-side terminal piece 133a is provided with a protrusion 133d as an engaging unit. The protrusion 133d is formed in such a manner that a part of the motor-side terminal piece 133a is pressed in a direction perpendicular to the motor-side terminal piece 133a, thereby protruding from the motor-side terminal piece 133a. The protrusion 133d is formed to protrude toward the motor terminal 26 connected to the motor-side terminal piece 133a as described later. The protrusion 133d protrudes in a direction substantially perpendicular to the direction of the rotation axis.

[0084] A pressing portion 133f is formed in the central portion of the plate portion 133c. The pressing portion 133f has a rectangular shape with one side connected to the plate portion 133c. That is, gaps are left between the three sides of the peripheral portion of the pressing portion 133f and the plate portion 133c. The pressing portion 133f is in the shape of a cantilever beam with one side portion connected to the plate portion 133c supported by the plate portion 133c. The pressing portion 133f is in the shape of a tongue with one side portion connected to the plate portion 133c supported by the plate portion 133c. The pressing portion 133f can bend relative to the plate portion 133c. That is, the upper terminal member 133 has flexibility.

[0085] The pressing portion 133f is slightly bent downward from the plate portion 133c. The pressing portion 133f contacts the surface of the PTC thermistor 180. That is, the pressing portion 133f contacts the upper electrode plate 182 of the PTC thermistor 180. Thus, the upper terminal member 133 is electrically connected to the lower terminal member 135 via the PTC thermistor 180.

[0086] Two arms 133h and two arms 133j are provided at the side edge of the plate portion 133c, which are bent from the plate portion 133c and extend downward. The arm portion 133j extends further downward than the arm portion 133h. The four arms 133h and 133j are inserted into the four holes 123 adjacent to the receiving portion 121, sandwiching the wall 122. A sawtooth-shaped anti-detachment protrusion 133k protruding laterally is provided at the side edge of each arm portion 133h and 133j.

[0087] The upper terminal member 133 is fixed to the bracket 110 by inserting the four arms 133h and 133j downward from above into the four holes 123. At this time, the retaining protrusion 133k is hooked on a part of the bracket 110, so that the upper terminal member 133 does not fall off from the bracket 110.

[0088] Fig.11 It is a perspective view showing the upper terminal member 133 in a state of being fixed to the bracket 110 .

[0089] exist Fig.11 , only the upper terminal member 133 is shown. After the upper terminal member 133 is inserted into the bracket 110, the distal ends of the two arm portions 133j are bent. That is, the distal ends of the arm portions 133j are bent, so that the arm portions 133j cannot be pulled upward from the hole portion 123. Thus, the upper terminal member 133 is reliably held by the bracket 110.

[0090] Fig.12 yes Fig.10 Cross-sectional view of line DD.

[0091] As described above, when the upper terminal member 133 is fixed to the bracket 110, Fig.12 As shown, the pressing portion 133 f contacts the surface of the PTC thermistor 180 , and presses the PTC thermistor 180 toward the bracket 110 .

[0092] That is, in a state where the upper terminal member 133 is fixed to the bracket 110, the pressing portion 133f contacts the central portion of the upper electrode plate 182 of the PTC thermistor 180. In addition, the PTC thermistor 180 is supported from the bottom at three points near the side edge of the lower electrode plate 182 by one contact protrusion 121f and two contact protrusions 135f. In this state, the pressing portion 133f is pushed and bent upward by the PTC thermistor 180 compared to the natural state (a state where no force is applied to the upper terminal member 133). Therefore, the PTC thermistor 180 is pressed toward the contact protrusions 121f and 135f by the restoring force of the pressing portion 133f. In other words, the lower terminal member 135 contacts the other side of the electrode plate 182 by the pressing portion 133f through the PTC thermistor 180 being pressed toward the bracket 110. In this way, the PTC thermistor 180 is maintained in a state of being reliably in contact with the upper terminal member 133 and the lower terminal member 135 .

[0093] Here, if Fig.12 As shown, the arm portions 133h and 133j of the upper terminal member 133 inserted into the hole portion 123 are opposed to the side surface of the PTC thermistor 180 via the wall 122. Since the wall 122 is provided, the arm portions 133h and 133j are not in contact with the PTC thermistor 180, and thus the PTC thermistor 180 is maintained to function reliably on the power supply path of the motor 1.

[0094] In addition, when terminals other than the upper terminal part 133, such as the lower terminal part 135 and the third terminal part 131, are arranged in a manner passing near the PTC thermistor 180, it is sufficient to set a wall such as the wall 122 between the PTC thermistor 180 and the terminals so that the terminals and the PTC thermistor 180 do not accidentally contact each other.

[0095] The terminal unit 100 is fixed to the bottom of the motor body 1c by the engagement portion being engaged with the engaged portion provided on the bottom side of the motor body 1c.

[0096] Specifically, for example, a hole 26e serving as a latched portion is provided on a terminal piece 26c of the motor terminal 26 protruding downward from a plate 40 serving as the bottom of the motor body 1c. The two terminal pieces 26c protrude downward from the motor body 1c. On the upper surface side of the terminal unit 100, a motor-side terminal piece 133a of the upper terminal member 133 and a motor-side terminal piece 131a of the third terminal member 131 are exposed in a manner corresponding to the respective terminal pieces 26c. Protrusions 131d, 133d serving as latched portions are formed on the respective motor-side terminal pieces 131a, 133a.

[0097] In the terminal unit 100, a terminal insertion space is provided on the side where the protrusions 131d and 133d of the motor-side terminal pieces 131a and 133a protrude. When the two terminal pieces 26c are inserted into the insertion space, the protrusions 131d and 133d come into contact with the surface of the terminal piece 26c, thereby slightly bending at least one of the motor-side terminal pieces 131a and 133a and the terminal piece 26c. When the protrusions 131d and 133d overlap with the hole 26e of the terminal piece 26c in the direction perpendicular to the rotation axis direction, the protrusions 131d and 133d sink into the hole 26e, and the two are engaged. In this way, the terminal piece 26c on the motor body 1c side is engaged with the motor-side terminal pieces 131a and 133a on the terminal unit 100 side, thereby fixing the terminal unit 100 to the motor body 1c. In addition, a concave engaged portion may be provided instead of the hole 26e. That is, the terminal unit 100 includes a motor-side terminal piece 131a and a motor-side terminal piece 133a as a motor terminal connection portion electrically connected to the motor terminal 26. One motor terminal 26 is engaged with the motor-side terminal piece 131a, and the other motor terminal 26 is engaged with the motor-side terminal piece 133a, so that the motor body 1c is connected to the terminal unit 100. Specifically, a portion of the surface of the motor-side terminal piece 131a facing the motor terminal 26 on one side and a portion of the surface of the motor-side terminal piece 133a facing the motor terminal 26 on the other side protrude. For example, a protrusion 131d is provided on the motor-side terminal piece 131a as a snap-in unit, and a protrusion 133d is provided on the motor-side terminal piece 133a as a snap-in unit. A hole portion 26e is provided as a portion to be engaged on the surface of the motor terminal 26 that is opposite to a portion (e.g., the protrusion 131d, the protrusion 133d) of the surface of the motor terminal connection portion (the motor-side terminal piece 131a, the motor-side terminal piece 133a). In addition, as described above, a recessed portion may be provided on the motor terminal 26 as a portion to be engaged. In addition, the portion where the motor body 1c and the terminal unit 100 are engaged may be only the engaging portion between the motor terminal 26 and the motor terminal connection portion (the motor-side terminal piece 131a, the motor-side terminal piece 133a).

[0098] In addition, the plate 40 that becomes the bottom of the motor body 1c and the bracket 110 are separable from each other. Specifically, in the axial direction of the motor 1, the surface 40b of the plate 40 that becomes the bottom of the motor body 1c and the surface 110b of the bracket 110 that are opposed to each other are separable from each other. In addition, the motor body 1c has a frame 10, and the frame 10 and the bracket 110 are separable from each other. Specifically, in the axial direction of the motor 1, the outer peripheral end 10b of the frame 10 and the outer peripheral end 110a of the bracket 110 that are opposed to each other are separable from each other. In this way, by forming a structure that allows the bottom of the motor body 1c and the bracket 110, or the frame 10 and the bracket 110 to be separable, the terminal unit can be freely changed according to the purpose of the motor, etc., or the transmission of the vibration of the motor to the terminal unit can be suppressed.

[0099] In this way, in the state where the motor body 1c is combined with the terminal unit 100, the wiring part that electrically connects the motor terminal 26 to the external terminal surfaces 131b and 135b can be accommodated in the terminal unit 100. That is, the wiring part of the first system that electrically connects the motor terminal 26 on one side to the external terminal surface 131b is composed of the third terminal member 131. In addition, the wiring part of the second system that electrically connects the motor terminal 26 on the other side to the external terminal surface 135b is composed of the upper terminal member 133, the PTC thermistor 180, and the lower terminal member 135. The PTC thermistor 180 is provided in the middle of the wiring part of the second system.

[0100] In addition, the engaging portion and the engaged portion to be engaged therewith are not limited to this. Instead of the male terminal as in the present embodiment, the motor body 1c side may have a female terminal as the engaged portion, and the terminal unit 100 may be provided with a male terminal piece protruding upward and engaging with the female terminal of the motor body 1c as the engaging unit. The terminal piece on the motor body 1c side may also be provided with a protruding engaged portion, and the terminal piece on the terminal unit 100 side may be provided with a hole-shaped or concave engaging portion. In addition, the engaged portion on the motor body 1c side is not limited to the terminal piece 26c, and may be provided at an appropriate location such as a part of the plate 40 of the motor body 1c, a part of the frame 10, or a part of the bracket 30. Similarly, the engaging portion on the terminal unit 100 side is not limited to the motor-side terminal pieces 131a and 133a, and may be provided at an appropriate location such as a part of the bracket 110 or a component mounted on the bracket 110.

[0101] In the past, it was difficult to ensure space for circuit components such as PTC thermistors in such small motors. For example, when a plate-shaped PTC thermistor is arranged in a small motor with a small diameter, the PTC thermistor is usually arranged substantially parallel to the rotation axis. However, when there is a restriction on the length of the motor in the direction of the rotation axis, it is difficult to arrange the PTC thermistor substantially parallel to the rotation axis in this way.

[0102] On the other hand, in the present embodiment, the PTC thermistor 180 can be arranged in a posture substantially perpendicular to the rotation axis direction. Therefore, the dimension of the motor 1 in the rotation axis direction can be shortened.

[0103] The upper surface of the PTC thermistor 180 faces the plate 40 that is the bottom surface of the housing of the motor body 1c. That is, the PTC thermistor 180 is arranged so that the area that can sense the heat of the motor body 1c becomes larger, so the detection accuracy of the PTC thermistor 180 is improved.

[0104] In addition, the PTC thermistor 180 is housed in a terminal unit 100 that can be externally mounted relative to the motor body 1c that functions as a motor even as a single unit. In the conventionally known structure, a hole for the PTC thermistor to pass through is often provided in the bottom plate of the motor, but with such a structure, there is a problem that the EMC (electromagnetic compatibility) noise countermeasures become insufficient. For example, there is a possibility that the switching noise of the commutator and brush is transmitted to the outside of the motor through the hole in the bottom plate as radiation noise. In contrast, in the present embodiment, it is not necessary to provide a hole in the motor housing for the PTC thermistor to pass through. Therefore, it is possible to manufacture a motor 1 with a built-in PTC thermistor 180 without damaging the EMC performance of the motor body 1c.

[0105] Furthermore, after the motor body 1c and the terminal unit 100 are manufactured separately, the motor 1 can be manufactured by assembling the motor body 1c and the terminal unit 100. Therefore, the production line for manufacturing the motor body 1c without the PTC thermistor 180 and the production line for the terminal unit 100 can be separated. Whether the motor body 1c is used as a single motor or as a motor 1 with the PTC thermistor 180, it can be efficiently manufactured using the same production line.

[0106] The terminal unit 100 is fixed to the motor body 1c by engaging with the bottom of the motor body 1c. Therefore, by installing the terminal unit 100 of the same structure on various motor bodies 1c having the bottom formed in the same manner and having different windings, lengths of rotating shafts, etc., it is possible to manufacture motors 1 with PTC thermistors 180 of different specifications of windings, rotating shafts, etc., respectively. Therefore, it is not necessary to prepare a production line for each motor with slightly different specifications, and the terminal unit 100 used in various motor bodies can be manufactured using the same production line, thereby enabling efficient manufacture of the motor 1.

[0107] The PTC thermistor 180 is assembled to the power supply line of the motor 1 without using solder or the like. Therefore, the motor 1 can be easily manufactured, and a malfunction caused by poor connection of solder or the like can be prevented from occurring.

[0108] When manufacturing the terminal unit 100, there is no process of making one of the upper terminal parts 133 and the lower terminal part 135 contact the electrode plate 182 of the PTC thermistor 180, such as making one slide relative to the other to make the two move relatively. Therefore, the electrode plate 182 will not be scratched by the upper terminal part 133 and the lower terminal part 135, and the PTC thermistor 180 will not be damaged when the terminal unit 100 is manufactured, so the terminal unit 100 can be easily manufactured.

[0109] The central portion of the upper surface of the PTC thermistor 180 is pressed downward by the pressing portion 133f. In addition, the lower surface of the PTC thermistor 180 is supported by the contact protrusion 121f near one side edge, and is supported by the contact protrusion 135f near the side edge opposite to the central portion in a direction perpendicular to the rotation axis direction. That is, the PTC thermistor 180 is held by the bracket 110 in a state where the central portion of the supporting beams at both ends bears a load, and can reliably maintain a state of contact with the contact protrusion 135f of the lower terminal member 135.

[0110] As the PTC thermistor 180, a plate-type component can be used. Compared with the case of using a surface-mounted PTC thermistor, a cheap PTC thermistor 180 can be used, so the manufacturing cost of the motor 1 can be reduced. In addition, since a plate-type PTC thermistor 180 can be used, a component of an appropriate shape can be used to match the shape of the terminal unit 100 and the purpose of the motor 1. Therefore, the degree of freedom of layout of the components of the terminal unit 100 can be improved.

[0111] [Second embodiment]

[0112] The basic structure of the motor 1 in the second embodiment is the same as that of the motor 1 in the first embodiment, so it will not be repeated here. The structure of the motor body 1c is the same as that of the first embodiment. In the second embodiment, a terminal unit 200 having a layout of terminals, etc. different from that of the above-mentioned terminal unit 100 is used, which is different from the first embodiment.

[0113] Fig.13 It is a plan view showing a terminal unit 200 of a motor 1 according to a second embodiment. Fig.14 1 is a side view showing the terminal unit 200 .

[0114] exist Fig.13 In FIG. 1 , the first terminal member 231 and the second terminal member 235 are hatched, and the upper terminal member 133, the PTC thermistor 180, and the motor terminal 26 on the motor body 1c side are indicated by double-dashed lines. Fig.13The X direction shown in FIG. 2 is a direction perpendicular to the pair of planar portions 201 b and 201 d , and the Y direction is a direction perpendicular to the pair of planar portions 201 a and 201 c , that is, a direction perpendicular to the X direction.

[0115] In the second embodiment, the terminal unit 200 includes: a bracket 210; a PTC thermistor 180 and a terminal portion 330b fixed to the bracket 210; and a wiring portion that electrically connects the motor terminal 26 of the motor body 1c to the terminal portion 330b. The terminal portion 330b includes two terminals 231b and 235b (a first terminal 231b and a second terminal 235b) having a contact surface that contacts the external terminal 380. The wiring portion is provided with two systems, namely, a wiring portion of a first system that electrically connects the first terminal 231b to the motor terminal 26 on one side, and a wiring portion of a second system that electrically connects the second terminal 235b to the motor terminal 26 on the other side. The wiring portions of the first system and the second system each include wiring formed by a metal component.

[0116] The terminal unit 200 is provided with a first terminal member 231, an upper terminal member 133 and a second terminal member 235. The upper terminal member 133 is configured substantially the same as that of the first embodiment. In the second embodiment, the first terminal member 231 and the second terminal member 235 are used instead of the third terminal member 131 and the lower terminal member 135 of the first embodiment.

[0117] The wiring section of the first system is constituted by the first terminal member 231. The wiring section of the second system is constituted by the upper terminal member 133, the PTC thermistor 180, and the second terminal member 235. That is, the PTC thermistor 180 is provided in the middle of the second wiring section.

[0118] In a second embodiment, if Fig.13 As shown, the first terminal member 231, the upper terminal member 133, the second terminal member 235, and the PTC thermistor 180 are mounted on the bracket 210. The bracket 210 is made of resin, for example.

[0119] The outer peripheral surface of the bracket 210 has, for example, four corner portions 202 and four flat portions 201 (in the case of the outer peripheral surface of the bracket 210) provided between two adjacent corner portions 202, similarly to the frame 10 of the motor body 1c. Fig.13 In the figure, there are a plane portion 201a, a plane portion 201b, a plane portion 201c and a plane portion 201d in a counterclockwise direction from the lower surface).

[0120] The bracket 210 is formed with grooves into which the terminal members 231, 133, and 235 are inserted. In addition, claws are formed for fixing the terminal members 231 and 133 to the bracket 210. Although their positions differ according to the positions of the terminal members 231, 133, and 235, their functions and shapes are the same as those in the first embodiment.

[0121] In the second embodiment, the bracket 210 is also provided with a housing 121 for housing the PTC thermistor 180. The housing 121 is provided at a position close to one of the flat surfaces 201b. The shape of the housing 121 and the housing structure of the PTC thermistor 180 electrically connected to the two terminal members 133 and 235 are the same as those in the first embodiment.

[0122] In the second embodiment, the terminal portion 330b is arranged at a position close to one of the flat portions 201d. That is, in the radial direction, the terminal portion 330b is arranged opposite to the PTC thermistor 180. In other words, the terminal portion 330b and the PTC thermistor 180 are arranged relative to the rotating shaft 2 (at Fig.13 The PTC thermistor 180 is located next to one of the two planar portions 201b and 201d that face each other across the rotating shaft 2, and the terminal portion 330b is located next to the other planar portion.

[0123] The first terminal member 231 is a metal plate formed by stamping or the like. An end portion (hereinafter referred to as the terminal end portion) of one side of the first terminal member 231 becomes the first terminal 231b of the terminal portion 330b. An end portion (hereinafter referred to as the terminal end portion) of the other side of the first terminal member 231 becomes a motor-side terminal piece 231a connected to the motor terminal 26. The specific shape of the motor-side terminal piece 231a is substantially the same as the motor-side terminal piece 131a of the third terminal member 131 in the first embodiment. In the first terminal member 231, wiring 231d is formed between the first terminal 231b and the motor-side terminal piece 231a. Through the wiring 231d and the motor-side terminal piece 231a, the first terminal 231b is electrically connected to the motor terminal 26 engaged with the motor-side terminal piece 231a.

[0124] The second terminal member 235 is a metal plate formed by stamping or the like. The end portion (hereinafter referred to as the terminal end portion) of one side of the second terminal member 235 becomes the second terminal 235b of the terminal portion 330b. The end portion (hereinafter referred to as the terminal end portion) of the other side of the second terminal member 235 becomes the element side terminal surface 235c extending toward the lower surface of the PTC thermistor 180. The specific shape of the element side terminal surface 235c is substantially the same as the element side terminal surface 135c. In the second terminal member 235, the wiring 235d is formed between the second terminal 235b and the element side terminal surface 235c. Through the wiring 235d and the element side terminal surface 235c, the second terminal 235b is electrically connected to the PTC thermistor 180 in contact with the element side terminal surface 235c. That is, the motor terminal 26 engaged with the motor side terminal piece 133a of the upper terminal member 133 is electrically connected via the PTC thermistor 180. In the second embodiment, the terminal unit 200 includes a motor-side terminal piece 231a of the first terminal member 231 and a motor-side terminal piece 133a of the upper terminal member 133 described in the first embodiment as a motor terminal connection portion electrically connected to the motor terminal 26. In the second embodiment, the motor terminal 26 on one side is engaged with the motor-side terminal piece 231a, and the motor terminal 26 on the other side is engaged with the motor-side terminal piece 133a, thereby connecting the motor body 1c and the terminal unit 200.

[0125] The first terminal component 231 and the second terminal component 235 may not be an integral component formed by molding a metal plate. For example, wiring composed of conductive wires may be used instead of wiring 231d and 235d to connect the first terminal 231b and the motor side terminal piece 231a, and the second terminal 235b and the element side terminal surface 235c.

[0126] The first terminal 231b and the second terminal 235b are formed so that the long side direction is in the X direction. Fig.13 As shown, when viewed from above, the direction from the plane portion 201d toward the plane portion 201b on the opposite side of the rotation axis 2 is the long side direction of each of the first terminal 231b and the second terminal 235b. The first terminal 231b and the second terminal 235b have shapes that are symmetrical with respect to a plane that passes through the rotation axis 2 and is perpendicular to the Y direction when viewed from above (that is, a plane that passes through the rotation axis 2 and is parallel to the plane portion 201c or the plane portion 201a). The first terminal 231b is inclined from the wiring 231d held by the bracket 210 in a manner that gradually approaches the rotation axis 2 in the Y direction, and extends to a position close to the plane portion 201d. The terminal end of the first terminal 231b is bent in a manner that is away from the rotation axis 2 in the Y direction.

[0127] The motor terminal 26 has a shape in which the dimension in the X direction is larger than the dimension in the Y direction. That is, the long side direction of the cross section perpendicular to the up-down direction of the motor terminal 26 is the X direction. The long side direction of the cross section perpendicular to the up-down direction of the motor terminal 26 is the same direction as the long side direction of the first terminal 231b and the second terminal 235b.

[0128] The first terminal 231b can be bent so that the tip portion thereof is displaced in the Y direction. That is, the two terminals 231b and 235b can approach or separate from each other.

[0129] The first terminal 231b is located inside an insertion port (hereinafter referred to as an external terminal insertion portion) 281 for inserting an external terminal provided on the bracket 210. The external terminal insertion portion 281 is an opening portion, hereinafter also referred to as an insertion portion. The external terminal insertion portion 281 has an inner wall surface 281b and an outer wall surface 281c each having a surface parallel to the plane portion 201c (extending along the long side direction of the first terminal 231, i.e.). The inner wall surface 281b is located on the inner side (closer to the rotating shaft 2) than the first terminal 231b in the Y direction, and the outer wall surface 281c is located on the outer side (farther from the rotating shaft 2) than the first terminal 231b in the Y direction.

[0130] The second terminal 235b is located inside the insertion port (hereinafter referred to as the external terminal insertion portion) 282 for inserting the external terminal provided on the bracket 210. The external terminal insertion portion 282 is an opening portion, hereinafter also referred to as the insertion portion. The external terminal insertion portion 282 has an inner wall surface 282b and an outer wall surface 282c each having a surface parallel to the plane portion 201c (extending along the long side direction of the second terminal 235, that is,). The inner wall surface 282b is located on the inner side of the second terminal 235b in the Y direction, and the outer wall surface 282c is located on the outer side of the second terminal 235b in the Y direction.

[0131] That is, the terminal portion 330b includes an external terminal insertion portion 281 as an insertion portion, and a first terminal 231b as a terminal provided on the inner side of the external terminal insertion portion 281. In addition, the terminal portion 330b includes an external terminal insertion portion 282 as an insertion portion, and a second terminal 235b as a terminal provided on the inner side of the external terminal insertion portion 282. Moreover, the first terminal 231b extends along the long side direction (X direction) of the external terminal insertion portion 281, and the second terminal 235b extends along the long side direction (X direction) of the external terminal insertion portion 282. The external terminal insertion portion 281 and the first terminal 231b and the external terminal insertion portion 282 and the second terminal 235b are arranged at positions symmetrical with respect to the rotation axis 2 in the Y direction in a manner opposed to each other in the Y direction.

[0132] In the present embodiment, the two motor terminals 26 are located between the two terminals 231b, 235b and the PTC thermistor 180 in the long side direction of the two terminals 231b, 235b, i.e., in the X direction. In the present embodiment, the motor terminal 26 on the flat surface 201c side connected to the motor-side terminal piece 231a and the motor terminal 26 on the flat surface 201a side connected to the motor-side terminal piece 133a are arranged opposite to each other in the radial direction. That is, the two motor terminals 26 are located at positions symmetrical with respect to the rotation axis 2 in the Y direction.

[0133] It can be said that in the X direction, the wiring portion of the first system is arranged between the motor terminal 26 on the plane portion 201c side and the first terminal 231b. In addition, the wiring portion of the second system extends from the motor terminal 26 on the plane portion 201a side to the plane portion 201b side and passes through the PTC thermistor 180, then bypasses the motor terminal 26 on the plane portion 201a side and is led to the second terminal 235b. That is, it can also be said that the wiring 235d of the wiring portion of the second system is a surplus length portion.

[0134] like Fig.14 As shown, the external terminal insertion parts 281 and 282 are open to the outside of the terminal unit 200 at the flat surface part 201d. The two terminals 231b and 235b are arranged at positions visible from the outside of the terminal unit 200 through the openings of the external terminal insertion parts 281 and 282.

[0135] Fig.15 It is a plan view showing the terminal unit 200 in a state where external terminals are connected.

[0136] like Fig.15 As shown, by inserting the external terminal 380 into the external terminal insertion parts 281 and 282, respectively, the two terminals 231b and 235b can be brought into contact with the external terminal 380, and the external terminal 380 and the motor terminal 26 can be electrically connected via the PTC thermistor 180. When the external terminal 380 is inserted, the first terminal 231b is deformed due to contact with the external terminal 380, and the end portion of the first terminal 231b is displaced outward in the Y direction. Similarly, when the external terminal 380 is inserted, the second terminal 235b is deformed due to contact with the external terminal 380, and the end portion of the second terminal 235b is displaced outward in the Y direction. The two terminals 231b and 235b are elastically deformed, respectively, and are pressed against the external terminal 380 by the restoring force to the original shape. Therefore, the state in which the two terminals 231b and 235b are in contact with the external terminal 380 can be reliably maintained.

[0137] The two terminals 231b and 235b are located inside the external terminal insertion parts 281 and 282. Therefore, even when an abnormal force is applied to each terminal 231b and 235b, for example, when the external terminal 380 is inserted in an inappropriate direction, each terminal 231b and 235b abuts against the inner wall surface 281b and 282b or the outer wall surface 281c and 282c in a state of being bent within the range of elastic deformation, and will not be further deformed. Therefore, the two terminals 231b and 235b can be prevented from being plastically deformed.

[0138] In addition, the first terminal member 231 and the second terminal member 235 may also have a male terminal that can be connected to an external circuit instead of the first terminal 231b and the second terminal 235b. The male terminal, for example, can be configured to protrude from the bracket 110 and can be connected to a female terminal, a wire, etc. provided in an external circuit. In addition, the first terminal member 231 and the second terminal member 235 can also be used by connecting a wire, etc. as in the first embodiment.

[0139] like Fig.13 As shown, in this embodiment, a recess 118 as a fixing portion for fixing to the motor body 1c is provided in a portion of the bracket 210 located between the two terminals 231b and 235b. As in the first embodiment, a hole 118a is provided in the recess 118.

[0140] Fig.16 yes Fig.13 Cross-sectional view of line DD.

[0141] exist Fig.16 In the figure, the terminal unit 200, the upper terminal member 133, and the PTC thermistor 180 are omitted. In addition, the plate 40 in the motor body 1c connected to the terminal unit 200 is shown.

[0142] like Fig.16 As shown, in the second embodiment, the terminal unit 200 and the motor body 1c are connected to each other using a fastening member 90. The fastening member 90 is, for example, a screw. The fastening member 90 is inserted into the inner side of the recess 118 from the lower side of the bracket 210, and the upper end portion (terminal end portion) is arranged in a manner that passes through the hole portion 118a and protrudes upward from the upper surface of the bracket 210. The fastening member 90 is screwed into the hole portion 43 provided in the plate 40. That is, the fastening member 90 for fixing the bracket 210 and the motor body 1c is provided in the hole portion 118a, and the hole portion 43 for inserting the fastening member 90 is formed in the plate 40.

[0143] In addition, as the fastening member 90, a member other than a screw, such as a rivet, may be used.

[0144] As described above, the motor 1 in the second embodiment also has a structure in which the terminal unit 200 storing the PTC thermistor 180 is fixed to the bottom of the motor body 1 c as in the first embodiment. Therefore, the same advantages as in the first embodiment can be obtained.

[0145] In the second embodiment, the terminal portion 330 b and the PTC thermistor 180 are arranged to face each other in the radial direction. Therefore, the interval between the terminal portion 330 b and the PTC thermistor 180 can be increased, and the positions of the wirings 231 d and 235 d can be easily set inside the holder 210 .

[0146] Since the fastening member 90 for fixing the terminal unit 200 and the motor body 1c is used, the terminal unit 200 and the motor body 1c are fixed more firmly. Therefore, even if a force is applied from the outside, the terminal unit 200 and the motor body 1c are not easy to disassemble. In addition, the position where the fastening member 90 is provided is closer to the plane portion 201d side where the external terminal 380 is inserted than the engaging portion with the motor terminal 26, and is closer to the plane portion 201d. Therefore, even when the external terminal 380 is inserted into or removed from the terminal unit 200, even if a force is applied to the terminal unit 200, the moment of displacement of the terminal unit 200 relative to the motor body 1c is reduced, thereby reliably preventing the terminal unit 200 from being damaged and the terminal unit 200 from being disassembled from the motor body 1c. In particular, since the external terminal 380 is provided between the two terminals 231b and 235b, when the external terminal 380 in contact with the two terminals 231b and 235b is used, the above-mentioned advantages become greater.

[0147] The long side direction of the cross section perpendicular to the up-down direction of the motor terminal 26 is substantially the same as the long side direction of the first terminal 231b and the second terminal 235b. That is, the direction (X direction) in which the external terminal 380 is plugged in and out relative to the terminal unit 200 is substantially consistent with the long side direction of the cross section perpendicular to the up-down direction of the motor terminal 26. In other words, the motor terminal 26 in the bracket 210 extends long in the long side direction of the insertion portion (external terminal insertion portion 281 and external terminal insertion portion 282). Thus, the insertion direction of the external terminal 380 can be made a direction in which the bending rigidity of the motor terminal 26 is high. Therefore, even when the fastening component 90 is not used and the terminal unit 200 is combined with the motor body 1c only by engaging with the motor terminal 26, the motor terminal 26 can be made less likely to bend or deform due to the force applied when the terminal unit 200 is plugged in and out. In the second embodiment in which the insertion direction of the external terminal 380 is set to the direction in which the bending stiffness of the motor terminal 26 is higher, the terminal unit 200 can be fixed to the motor body 1c only by making the part where the motor body 1c and the terminal unit 100 are embedded in the embedding part of the motor terminal 26 and the motor terminal connecting part (motor side terminal piece 131a, motor side terminal piece 133a).

[0148] That is, the motor body 1c and the terminal unit 200 may be connected only by fitting one motor terminal 26 to the motor-side terminal piece 231a and the other motor terminal 26 to the motor-side terminal piece 133a. Fig.17 This is a diagram for explaining the connection between the motor body 1 c and the terminal unit 200 in the second embodiment. Fig.17 Indicates that Fig.13 The terminal unit 200 shown is a part of a cross section cut along a plane parallel to the flat portion 201 b and passing through the motor terminal 26 , in a state where the terminal unit 200 is connected to the motor body 1 c only by fitting the motor terminal 26 into the motor terminal connecting portion.

[0149] like Fig.17 As shown in FIG. 1 , a portion of the surface of the motor-side terminal piece 231a facing one motor terminal 26 and a portion of the surface of the motor-side terminal piece 133a facing the other motor terminal 26 protrude. For example, the motor-side terminal piece 133a is provided with Fig.11The protrusion 133d shown serves as a snap-fit ​​portion. In addition, a protrusion 231e is provided on the motor-side terminal piece 231a as a snap-fit ​​portion. As described above, the specific shape of the motor-side terminal piece 231a is substantially the same as the motor-side terminal piece 131a of the third terminal component 131, and the specific shape of the protrusion 231e is substantially the same as the protrusion 133d. That is, the protrusion 231e is formed in a manner that a part of the motor-side terminal piece 231a is pressed in a direction intersecting the motor-side terminal piece 231a (in an embodiment, a vertical direction) so as to protrude from the motor-side terminal piece 231a. The protrusion 231e is formed to protrude toward the motor terminal 26 connected to the motor-side terminal piece 231a. The protrusion 133d protrudes in a direction intersecting the direction of the rotation axis (in an embodiment, a substantially vertical direction).

[0150] Furthermore, a hole 26e is provided as a portion to be engaged on the surface of the motor terminal 26 that is opposite to a portion (e.g., the protrusion 231e, the protrusion 133d) of the surface of the motor terminal connection portion (the motor-side terminal piece 231a, the motor-side terminal piece 133a). In addition, a recess may be provided on the motor terminal 26 as a portion to be engaged.

[0151] Here, assuming that the insertion direction of the external terminal 380 is set to the Y direction, there is a situation where the force applied from the outside due to the insertion of the external terminal 380 acts in a direction that causes the motor terminal 26 to be disengaged from the mating portion of the motor terminal connection portion (motor-side terminal piece 231a, motor-side terminal piece 133a). However, in the second embodiment, by setting the insertion direction of the external terminal 380 to the X direction, the force applied from the outside due to the insertion of the external terminal 380 becomes a direction that intersects with the direction that causes the mating portion of the motor terminal 26 and the motor terminal connection portion (motor-side terminal piece 231a, motor-side terminal piece 133a) to be disengaged (in the embodiment, a direction that is approximately perpendicular), and the effect on the mating portion is small. Thus, in the second embodiment, the mating of the motor terminal 26 and the motor terminal connection portion can be maintained.

[0152] In addition, the mating method of the motor terminal 26 and the motor terminal connecting portion is not limited to Fig.17 the way exemplified. use Fig.18 Explain it. Fig.18 This is a diagram for explaining a modified example of the connection between the motor body 1 c and the terminal unit 20 in the second embodiment.

[0153] In this modification, the first terminal member 2310 is used instead of the first terminal member 231. The first terminal member 2310 is a member obtained by replacing the motor-side terminal piece 231a of the first terminal member 231 with a motor-side terminal piece 2310a. In addition, in this modification, the upper terminal member 1330 is used instead of the upper terminal member 133. The upper terminal member 1330 is a member obtained by replacing the motor-side terminal piece 133a of the upper terminal member 133 with a motor-side terminal piece 1330a.

[0154] The motor-side terminal piece 2310a includes a first face portion 2311a, a connecting portion 2312a, and a second face portion 2313a. The first face portion 2311a is substantially parallel to the plane portion 201a and extends in the direction of the rotation axis (arrow A1). The connecting portion 2312a intersects with the plane portion 201a (substantially perpendicular in the embodiment) and extends in the Y direction. The first face portion 2311a is connected to one end of the connecting portion 2312a (the end on the side close to the rotation axis 2, the end on the negative side in the Y direction), and the second face portion 2313a is connected to the other end of the connecting portion 2312a (the end on the side away from the rotation axis 2, the end on the positive side in the Y direction). The second face portion 2313a extends from the other end of the connecting portion 2312a in the direction of the rotation axis. The second face portion 2313a extends in a manner close to the first face portion 2311a as it approaches the motor body 1c side (upper side), and then extends in a manner away from the first face portion 2311a. That is, the second surface portion 2313 a is curved, thereby forming a protrusion 2310 e that protrudes toward the negative side in the Y direction.

[0155] The motor-side terminal piece 1330a includes a first face portion 1331a, a connecting portion 1332a, and a second face portion 1333a. The first face portion 1331a is substantially parallel to the plane portion 201c and extends in the rotation axis direction (arrow A1). The connecting portion 1332a is substantially perpendicular to the plane portion 201c and extends in the Y direction. The first face portion 1331a is connected to one end portion of the connecting portion 1332a (the end portion on the side close to the rotation axis 2, the end portion on the positive side in the Y direction), and the second face portion 1333a is connected to the other end portion of the connecting portion 1332a (the end portion on the side away from the rotation axis 2, the end portion on the negative side in the Y direction). The second face portion 1333a extends from the other end portion of the connecting portion 1332a in the rotation axis direction. The second face portion 1333a extends in a manner approaching the first face portion 1331a as it approaches the motor body 1c side (upper side), and then extends in a manner away from the first face portion 1331a. That is, the second surface portion 1333a is curved, thereby forming a protrusion 1330d that protrudes toward the positive side in the Y direction.

[0156] That is, the motor-side terminal piece 2310a is provided with a protrusion 2310e as a locking unit, and the motor-side terminal piece 1330a is provided with a protrusion 1330d as a locking unit. In addition, a hole 26e is provided as a locked portion on the surface of the motor terminal 26 that is opposite to a part (for example, the protrusion 2310e, the protrusion 1330d) of the surface of the motor terminal connection part (motor-side terminal piece 2310a, motor-side terminal piece 1330a). In addition, a recessed portion may be provided on the motor terminal 26 as a locked portion.

[0157] exist Fig.18 In the modified example shown, the motor terminal 26 on one side is sandwiched between the first face portion 2311a and the second face portion 2313a when the protrusion 2310e is inserted into the hole portion 26e, and the motor terminal 26 on the other side is sandwiched between the first face portion 1331a and the second face portion 1333a when the protrusion 1330d is inserted into the hole portion 26e. Thus, in this modified example, the connection between the motor body 1c and the terminal unit 20 can be made more firmly.

[0158] The bracket 210 includes an outer peripheral end portion 210a (see FIG. 21A ) that faces the outer peripheral end portion 10b of the frame 10 in the axial direction of the motor 1. Fig.14 , Fig.17 , Fig.18 ).like Fig.14 , Fig.17 as well as Fig.18 As shown in FIG. 2 , the outer peripheral end 210a of the bracket 210 has a surface 210b that faces the outer peripheral end 10b of the frame 10 in the axial direction of the motor 1. Fig.14 and Fig.16 As shown, the outer peripheral end 210a of the bracket 210 has a plurality of protrusions 210c protruding from the surface 210b toward the plate 40 that becomes the bottom of the motor body 1c in the axial direction of the motor 1. These protrusions 210c are opposite to the plate 40 that becomes the bottom of the motor body 1c, and are in contact with the inner surface of the outer peripheral end 10b of the frame 10. The terminal unit 200 is positioned (guided) relative to the frame 10 by the protrusions 210c.

[0159] In addition, the plate 40 that becomes the bottom of the motor body 1c and the bracket 210 are separable from each other. Specifically, in the axial direction of the motor 1, the surface 40b of the plate 40 that becomes the bottom of the motor body 1c and the surface 210b of the bracket 210 that are opposed to each other are separable from each other. In addition, the motor body 1c has a frame 10, and the frame 10 and the bracket 210 are separable from each other. Specifically, in the axial direction of the motor 1, the outer peripheral end 10b of the frame 10 and the outer peripheral end 210a of the bracket 210 that are opposed to each other are separable from each other. In this way, by forming a structure that allows the bottom of the motor body 1c and the bracket 210, or the frame 10 and the bracket 210 to be separable, the terminal unit can be freely changed according to the purpose of the motor, etc., or the transmission of the vibration of the motor to the terminal unit can be suppressed.

[0160] Fig.19 It is a plan view showing a terminal unit 400 according to a modified example of the second embodiment.

[0161] In the second embodiment, other electronic components other than the PTC thermistor 180 may be provided in the wiring 235d portion of the wiring portion of the second system as the surplus length portion. Fig.19 As shown, the terminal unit 400 has a wiring 235 d to which a capacitor (an example of another electronic component) 480 other than the PTC thermistor 180 can be connected.

[0162] Thus, in the second embodiment, since the terminal portion 330b and the PTC thermistor 180 are arranged in a manner opposite to each other in the radial direction, the wiring 235d of the wiring portion of the second system is routed around the motor terminal 26 on the side of the plane portion 201a, so that an electronic component different from the PTC thermistor 180 can be arranged at this position. Therefore, an area capable of mounting a plurality of electronic components can be ensured in the terminal unit 400. Since other electronic components mounted on the motor body 1c can be mounted on the terminal unit 400 in addition to the PTC thermistor 180, the motor body 1c can be miniaturized, and the entire motor 1 can be miniaturized.

[0163] In addition, as other electronic components different from the PTC thermistor 180, it is not limited to the above components, and various circuit elements can be arranged. For example, a choke coil, an IC (integrated circuit), etc. can also be mounted.

[0164] [other]

[0165] The motor may be configured by partially combining the characteristic features of the above-mentioned embodiments and modified examples. In the above-mentioned embodiments and modified examples, some components may not be provided, or some components may be configured in other ways.

[0166] The outer peripheral shape of the terminal unit may be different from that of the motor body. The terminal unit may have a larger outer peripheral shape in a direction perpendicular to the rotation axis direction or a smaller outer peripheral shape than that of the motor body.

[0167] As the electronic component mounted on the terminal unit, in addition to the PTC thermistor, a circuit element such as a choke coil may be provided. In addition, other electronic components may be arranged on the power supply line for supplying power to the motor instead of the PTC thermistor.

[0168] The motor terminals of the motor body are not limited to two, and may be more than two. As long as the terminal unit has a structure including a terminal portion, a wiring portion electrically connecting at least one motor terminal to the terminal portion, and an electronic component disposed in the middle of the wiring portion, it may not have a terminal connected to other motor terminals. In this case, by applying voltage to the terminal portion of the terminal unit and other motor terminals from the outside of the motor, power can be supplied to the motor.

[0169] The plate that becomes the bottom of the motor body and the bracket are separable from each other, and may not fit together (non-fitting). Specifically, in the axial direction of the motor, the surface of the plate that becomes the bottom of the motor body and the surface of the bracket that are opposed to each other are separable from each other, and may not fit together (non-fitting). In addition, the motor body has a frame, and the frame and the bracket are separable from each other, and may not fit together (non-fitting). Specifically, in the axial direction of the motor 1, the outer peripheral end 10b of the frame 10 and the outer peripheral end 110a of the bracket 110 that are opposed to each other are separable from each other, and may not fit together (non-fitting). In this way, by forming a structure in which the bottom of the motor body 1c and the bracket 110, or the frame 10 and the bracket 110, are separable and non-fitting (non-fitting), the terminal unit can be freely changed according to the purpose of the motor, etc., or the transmission of the vibration of the motor to the terminal unit can be suppressed.

[0170] The motor configured as described above can be used for various purposes, for example, it can be used for electronic equipment or can be mounted on various vehicles.

[0171] The above embodiments should be considered as illustrative in all points and not limiting the invention. The scope of the present invention is indicated by the claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0172] Description of Reference Numerals

[0173] 1…motor; 1c…motor body; 2…rotating shaft; 26…motor terminal; 40…plate; 43…hole portion; 90…fastening member; 100, 200, 400…terminal unit; 110, 210…bracket; 118…recess (an example of a fixing portion); 118a…hole portion; 131…third terminal; 133…upper terminal; 135…lower terminal; 180…PTC thermistor (an example of an electronic component); 231…first terminal member; 231b…first terminal; 231d…wiring; 235…second terminal member; 235b…second terminal; 235d…wiring; 281, 282…external terminal insertion portion; 330b…terminal portion; 380…external terminal; 480…capacitor (an example of other electronic components).

Claims

1. A motor, wherein: have: a motor body having a frame, a bottom having a plate closing an opening of the frame, and a motor terminal provided at the bottom; and A terminal unit is mounted on the bottom of the motor body. The terminal unit comprises: Bracket; The electronic components and the terminal parts are fixed to the bracket; and a wiring portion electrically connecting the motor terminal and the terminal portion, The electronic component is provided in the wiring portion, The terminal portion and the electronic component are arranged to face each other in the radial direction. In the rotation axis direction, the surface of the electronic component on the board side is arranged on the bracket side relative to the surface of the board. In the direction of the rotation axis, the outer peripheral end portions of the plates facing each other do not fit into the outer peripheral end portions of the brackets. In the direction of the rotation axis, the opposing surfaces of the plate and the support do not fit together. The terminal unit includes a motor terminal connection portion electrically connected to the motor terminal. The motor terminal is engaged with the motor terminal connection portion, and the motor body is connected to the terminal unit. A portion of the surface of the motor terminal connecting portion facing the motor terminal protrudes, A recess or a hole is provided on a surface of the motor terminal that is opposed to a portion of a surface of the motor terminal connection portion. A portion of the surface of the motor terminal connecting portion is engaged with the surface of the motor terminal, The bracket includes an external terminal insertion portion opened in a radial direction, The direction in which the external terminal is inserted into the external terminal insertion portion is different from the direction in which the motor terminal extends.

2. The motor according to claim 1, wherein: The terminal portion includes an opening portion and a terminal provided inside the opening portion. The terminal extends in the long side direction of the opening, The motor terminal in the bracket extends in the longitudinal direction of the opening.

3. The motor according to claim 1 or 2, wherein: The terminal portion includes two terminals, each of which has a contact surface that contacts an external terminal. The two terminals can be brought closer to or separated from each other.

4. The motor according to claim 3, wherein: In the long side direction of the terminal, the motor terminal and the remaining motor terminals are located between the two terminals and the electronic component. The wiring portion is provided with two systems for electrically connecting the two terminals to the motor terminal and the remaining motor terminals, respectively. In the long side direction of the terminal, the wiring portion of the first system is arranged between the motor terminal and one of the two terminals among the motor terminal and the remaining motor terminals, The wiring portion of the second system bypasses the motor terminal and the remaining motor terminal and is routed to the other terminal.

5. The motor according to claim 4, wherein: The wiring portion of the second system has a surplus length portion in the bracket that can be connected to an electronic component other than the electronic component.

6. A motor, wherein: have: a motor body having a frame, a bottom having a plate closing an opening of the frame, and a motor terminal provided at the bottom; and A terminal unit is mounted on the bottom of the motor body. The terminal unit includes a bracket and a terminal portion fixed to the bracket. The terminal unit includes a motor terminal connection portion electrically connected to the motor terminal. The motor terminal is engaged with the motor terminal connection portion, and the motor body is connected to the terminal unit. The terminal portion includes an opening and a terminal disposed inside the opening. The terminal extends in the long side direction of the opening, The motor terminal in the bracket extends in the long direction of the opening. In the direction of the rotation axis, the outer peripheral end portions of the plates facing each other do not fit into the outer peripheral end portions of the brackets. In the direction of the rotation axis, the opposing surfaces of the plate and the support do not fit together. A portion of the surface of the motor terminal connecting portion facing the motor terminal protrudes, A recess or a hole is provided on a surface of the motor terminal that is opposed to a portion of a surface of the motor terminal connection portion. A portion of the surface of the motor terminal connecting portion is engaged with the surface of the motor terminal, The bracket includes an external terminal insertion portion opened in a radial direction, The direction in which the external terminal is inserted into the external terminal insertion portion is different from the direction in which the motor terminal extends.

7. The motor according to claim 6, wherein: The portion where the motor body and the terminal unit are fitted together is only a fitting portion between the motor terminal and the motor terminal connecting portion.

8. A motor, wherein: have: a motor body having a bottom portion and two motor terminals disposed on the bottom portion; and A terminal unit is mounted on the bottom of the motor body. The terminal unit comprises: Bracket; The electronic components and the terminal parts are fixed to the bracket; and a wiring portion electrically connecting the motor terminal and the terminal portion, The electronic component is provided in the wiring portion, The terminal portion and the electronic component are arranged to face each other in the radial direction. The terminal portion includes two terminals having contact surfaces for contacting external terminals. In the long side direction of the terminal, the two motor terminals are located between the two terminals and the electronic component. The wiring portion is provided with two systems for electrically connecting the two terminals and the two motor terminals, respectively. The wiring portion of the first system is arranged between one of the two motor terminals and one of the two terminals in the long side direction of the terminal. The wiring portion of the second system bypasses the other motor terminal of the two motor terminals and is routed to the other terminal.

9. The motor according to claim 8, wherein: The terminal unit includes a motor terminal connection portion electrically connected to the motor terminal. The motor terminal is engaged with the motor terminal connection portion, and the motor body is connected to the terminal unit. The terminal portion includes an opening portion and a terminal provided inside the opening portion. The terminal extends in the long side direction of the opening, The motor terminal in the bracket extends in the longitudinal direction of the opening.

10. The motor according to claim 9, wherein: A portion of a surface of the motor terminal connecting portion that faces the motor terminal protrudes.

11. The motor according to claim 10, wherein: A recess or a hole is provided on a surface of the motor terminal that is opposed to a portion of a surface of the motor terminal connecting portion.

12. The motor according to any one of claims 8 to 11, wherein: A fixing portion fixed to the motor body is provided at a portion of the bracket between the two terminals.

13. The motor according to claim 12, wherein: The fixing portion is provided with a hole portion, The hole portion is provided with a fastening member for fixing the bracket and the motor body.

14. The motor according to claim 13, wherein: A metal plate is provided on the motor body facing the bracket. The metal plate has a hole formed therein for inserting the fastening member.

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