Rotary apparatus

Abstract

To provide a rotary apparatus capable of stably bringing a member for GND equipped in an end cap into contact with a housing.SOLUTION: A rotary apparatus comprises a motor, a housing 131 consisting of conductive material which comprises a cylindrical part for housing the motor, an end cap 160 which is arranged so as to be opposite to an inner peripheral surface of the cylindrical part, a circuit board 144 for forming a GND circuit, and a terminal pin 200. A pin part 222 of the terminal pin 200 is extended to one end side in an axial direction to be brought into connect with a GND circuit. A second side plate part 230 of the terminal pin 200 is extended to the other end side in the axial direction to be supported by an inside annular part 162 of the end cap 160. A contact piece 233 of the terminal pin 200 is disposed between the inner peripheral surface of the housing 131 and the inside annular part 162, and thereby brought into contact with the housing 131.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a rotating device that can stably bring a GND terminal pin connected to a circuit board of a motor into contact with a housing of the motor. [Background technology]

[0002] A known example of a rotating device having a motor is a centrifugal blower as shown in Patent Document 1. As shown in Fig. 11, this centrifugal blower has a casing 10, inside which an impeller 20 having a plurality of blades 21 and a motor 30 for rotating the impeller 20 are housed.

[0003] Here, the motor 30 is equipped with a circuit board on which a control circuit and electronic components for driving and controlling the motor 30 are mounted, and a GND pattern formed on the circuit board is connected to a metal motor case.

[0004] Also, a centrifugal blower has been proposed in which a GND wiring connected to a GND pattern of a circuit board is connected to a housing of a motor (see, for example, Patent Document 2). In Patent Document 2, as shown in Fig. 12, an annular end cap 160 is arranged on the other axial end side of a circuit board 144, a pin portion 222 at one end of a connection terminal 200 is connected to the GND pattern, and a contact piece 233 having spring properties and elastically abutting against the inner peripheral surface of a housing 131 is formed at the other end of the connection terminal 200. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-016152 A [Patent Document 2] JP 2022-181887 A Summary of the Invention [Problem to be solved by the invention]

[0006] The connection terminal 200 in Patent Document 2 has a U-shape in side view and is attached to a protrusion 169 formed on the end cap 160 and protruding radially inward. When the end cap 160 is joined to the housing 131, the contact piece 233 is pushed into the inside of the housing 131. At that time, a force acts on the contact piece 233 in the direction opposite to the pushing direction, so there is a concern that the top plate portion 220 of the connection terminal 200 may lift off the protrusion 169.

[0007] The present invention has been made in consideration of the above circumstances, and has an object to provide a rotating device that enables a GND member attached to an end cap to stably contact with a housing. [Means for solving the problem]

[0008] The present invention is a rotating device comprising a motor, a housing made of a conductive material having a cylindrical portion that accommodates the motor, an end cap arranged opposite the inner surface of the cylindrical portion, a circuit board having a GND circuit formed thereon, and a terminal pin, one end of the terminal pin extending toward one axial end and connected to the GND circuit, and the other end of the terminal pin extending toward the other axial end and supported by the end cap, the other end of the terminal pin being disposed between the inner surface of the cylindrical portion of the housing and the end cap, and the other end of the terminal pin being in contact with the inner surface of the cylindrical portion. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view of a rotating device according to an embodiment of the present invention; [Diagram 2] FIG. 2A is a plan view of a rotating device according to an embodiment of the present invention, and FIG. 2B is an enlarged view of a portion indicated by an arrow B in FIG. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 4 is an enlarged cross-sectional view of the left half of FIG. [Diagram 5] 5 is an enlarged view of a portion indicated by an arrow V in FIG. 4. [Figure 6] FIG. 2A is a plan view showing an end cap in the embodiment, and FIG. 2B is an enlarged view of a portion indicated by arrow B in FIG. [Figure 7] FIG. 2 is a perspective view showing an end cap in the embodiment. [Figure 8] 7A is a cross-sectional view taken along line VIII-VIII in FIG. 6, (B) is an enlarged view of the portion indicated by arrow B in (A), and (C) is an enlarged view of the portion indicated by arrow C in (B). [Figure 9] FIG. 2 is a perspective view showing a terminal pin in the embodiment. [Figure 10] FIG. 11 is a side view showing a terminal pin in a modified example of the embodiment. [Figure 11] FIG. 1 is a cross-sectional view showing a conventional centrifugal blower (Patent Document 1). [Figure 12] FIG. 1 is a cross-sectional view showing a conventional centrifugal blower (Patent Document 2). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] 1. Configuration of centrifugal blower A centrifugal blower 100 as a rotating device according to an embodiment of the present invention will be described with reference to Figures 1 to 10. As shown in Figure 3, the centrifugal blower 100 includes an impeller 120 that includes an inner space on the axial center side and a plurality of blades 121 arranged in an annular portion around the inner space, and that rotates to exhaust air from the inner space in a centrifugal direction through the plurality of blades 121, a spiral-shaped casing 110 that houses the impeller 120 inside in a freely rotatable state, and an intake port 114 that is a circular opening provided at a position facing the inner space of the impeller 120 and that guides air into the inner space of the impeller 120.

[0011] The casing 110 is composed of an upper casing 111 molded from resin and a lower casing 112 molded from resin. As shown in Fig. 1 and Fig. 2(B), a plurality of claws 112a are formed at equal intervals in the circumferential direction on the upper edge of the outer periphery of the lower casing 112, protruding axially upward and protruding radially outward at the upper end. On the other hand, a plurality of engagement parts 111a having a rectangular frame shape are formed on the outer periphery of the upper casing 111, and the claws 112a are inserted into and engaged with the engagement parts 111a, thereby joining the upper casing 111 and the lower casing 112.

[0012] A spiral flow passage 113 (see FIG. 3) is formed inside the casing 110. The flow passage 113 has a structure in which the cross-sectional area gradually increases from the start point where the gap between the impeller 120 and the casing 110 is smallest, proceeding in the clockwise circumferential direction in FIG. 1. An outlet 115 is formed at the end of the flow passage 113. That is, the spiral flow passage 113 has a structure in which the cross-sectional area gradually increases toward the outlet 115.

[0013] The upper casing 111 has a suction port 114 that opens in the axial direction. Here, the axis refers to the shaft 151 of the impeller 120, and the axial direction refers to the direction in which it extends. The lower casing 112 has fixing legs 116 for mounting and fixing to another device or housing, and is also equipped with a motor 130 (see FIG. 3) for rotating the impeller 120. In FIG. 1, reference numeral 116a denotes a metallic collar.

[0014] As shown in Fig. 3, impeller 120 is fixed to shaft 151 of motor 130, and when motor 130 rotates, impeller 120 rotates. When impeller 120 rotates, air is sucked in from suction port 114 and guided to the inside of impeller 120 (internal space on the axial center side). This air is blown out in the centrifugal direction from the inside of impeller 120 by the action of blades 121. The air blown out from impeller 120 flows through spiral flow passage 113 toward discharge port 115 in Fig. 1 and is exhausted from discharge port 115.

[0015] In the following description, the direction perpendicular to the axial direction is referred to as the "radial direction," and the direction rotating around shaft 151 is referred to as the "circumferential direction." Furthermore, terms indicating directions such as "up" and "down" are used to indicate directions in the drawings to which reference is made.

[0016] Impeller 120 has a cup-shaped hub 122 that forms the top surface, a plurality of blades 121 arranged with the outer arc-shaped portion of hub 122 standing upright in the axial direction, and an annular connecting ring 123 that connects the ends of the plurality of blades 121 opposite to hub 122. All of the blades 121 have the same shape, have a forward-facing blade shape that is concave with respect to the rotation direction of impeller 120, and are evenly arranged in the circumferential direction. An inner space is provided inside the plurality of blades 121 (toward the center of the axis), and when impeller 120 rotates, air is blown out from this inner space in the centrifugal direction through the blades 121.

[0017] 4, the hub 122 has a boss portion 124 at its center that protrudes upward in a convex shape, and a through hole 124a is formed in the boss portion 124. A cylindrical metallic (e.g., brass) bush 125 is fixed to the inner periphery of the through hole 124a by insert molding, and a shaft 151 of the motor 130 is press-fitted into the bush 125, thereby connecting the impeller 120 to the shaft 151. The shaft 151 is the rotating shaft of the motor 130, and by connecting with the impeller 120, it also serves as the rotating shaft of the impeller 120. The hub 122, the plurality of blades 121, and the connecting ring 123 are integrally formed of resin.

[0018] 2.Motor configuration The motor 130 is an inner rotor type three-phase brushless motor, and includes a cup-shaped housing (cylindrical portion) 131 made of a conductive metal material. A stator 140 is disposed on the inner peripheral surface of the housing 131. As shown in FIG. 4, the stator 140 includes a stator core 141 formed by laminating a predetermined number of cores made of electromagnetic steel sheets, an insulator 142 attached to the stator core 141, a three-phase coil 143 wound around the stator core 141 via the insulator 142, and a circuit board 144 disposed below the insulator 142. The stator core 141 has a plurality of teeth 141b extending radially inward from an annular core back portion 141a, and the coil 143 is wound around the teeth 141b via the insulator 142.

[0019] 5, the insulator 142 is formed with a protruding portion 142a that contacts an end face of the core back portion 141a and protrudes in the axial direction. A plurality of grooves 142b are provided continuously in the up-down direction (axial direction) on the outer circumferential surface of the protruding portion 142a, and crossover wires 143a of the coil 143 are arranged in the grooves 142b.

[0020] 4, rotor 150 is disposed inside stator core 141. Rotor 150 includes metal shaft 151, cup-shaped rotor yoke 152 coupled to the lower end of shaft 151, and ring-shaped rotor magnet 153 fixed to the outer circumferential surface of rotor yoke 152. A boss portion 152a is formed in the center of rotor yoke 152 made of a magnetic metal material, for example, by burring, and shaft 151 is press-fitted into boss portion 152a to couple shaft 151 and rotor yoke 152 together.

[0021] A boss portion 131a is formed in the center of the housing 131, and a metal (e.g., brass) bearing holder 132 is press-fitted into the boss portion 131a. A pair of ball bearings 133 are attached to the bearing holder 132, and the shaft 151 is rotatably supported by the pair of ball bearings 133. A compression coil spring 134 is interposed between the pair of ball bearings 133, and applies a preload to the ball bearings 133 by biasing the outer rings of the ball bearings 133.

[0022] 4, a plurality of flanges 131b extending radially outward are formed at equal intervals in the circumferential direction on the periphery of the opening of the housing 131. A long through hole 131c is formed in each flange 131b along the circumferential direction. The through hole 131c is used to connect the housing 131 and the lower casing 112, as described later.

[0023] 4, a circuit board 144 mounting a circuit for controlling the driving of the motor 130 is disposed axially below the stator core 141. An end 143c of the coil 143 wound around the stator core 141 is inserted into a through hole (not shown) connected to a wiring pattern formed on the mounting surface of the circuit board 144 and connected with solder 145.

[0024] 3. End cap configuration A ring-shaped resin end cap 160 is attached to the axially lower side of the housing 131. Fig. 6 is a plan view of the end cap 160, and Fig. 7 is a perspective view. The end cap 160 includes an outer annular portion 161 that constitutes an outer peripheral wall portion, and an inner annular portion 162 that is disposed radially inward relative to the outer annular portion 161. A pocket portion 163 that protrudes radially inward is formed on the inner peripheral surface of the outer annular portion 161.

[0025] Pocket portion 163 is a cylinder having a generally triangular shape in a plan view with both ends open. A notch (not shown) is formed in the outer periphery of circuit board 144 in accordance with the position of pocket portion 163, and the common coupling portion of coil 143 of each phase protrudes from the notch of circuit board 144 in the axial direction and is inserted into pocket portion 163.

[0026] A plurality of (four in this example) flange portions 164 protruding radially outward are formed at equal intervals in the circumferential direction on the outer peripheral surface of the outer annular portion 161 of the end cap 160, and each flange portion 164 has a long through hole 164a formed along the circumferential direction.

[0027] A connector housing 166 is formed integrally with the end cap 160. A connector pin 167 is formed integrally with the connector housing 166 by insert molding. One end of the connector pin 167 protrudes toward the circuit board 144, and the other end protrudes into the internal space of the connector housing 166 and is connected to a socket inserted into the connector housing 166.

[0028] A plurality of (two in this example) protrusions 168 are formed on the inner annular portion 162 of the end cap 160, each protruding inward in the radial direction and forming a substantially triangular shape. A fastening pin 168a protruding upward is formed on the protrusions 168. Meanwhile, a through hole (not shown) through which the fastening pin 168a is inserted is formed in the circuit board 144, and the circuit board 144 is fixed to the end cap 160 by thermally caulking the fastening pin 168a.

[0029] The inner annular portion 162 of the end cap 160 is formed with a plurality of (two in this example) inner circumferential flange portions 169 that protrude radially inward at the position of the flange portion 164. A terminal pin 200 is attached to the inner circumferential flange portion 169. The terminal pin 200 is made of a material having spring properties, and as shown in Fig. 9, is crank-shaped in side view and has a rectangular support plate portion (support portion) 210 that forms the center of the crank. Examples of materials that have spring properties and excellent conductivity include phosphor bronze and stainless steel for springs.

[0030] An opening 211 is formed in the center of support plate portion 210. A first side plate portion 220 extends from one edge of support plate portion 210, perpendicular to support plate portion 210. A portion of first side plate portion 220 close to support plate portion 210 is tapered into a triangular shape, and at the tip of the triangular shape, an angular pin portion 222 is formed to be inserted into through hole 144a (see FIG. 5) formed in circuit board 144.

[0031] A second side plate portion (other end portion) 230 perpendicular to the support plate portion 210 extends from the other edge portion of the support plate portion 210 of the terminal pin 200 in the opposite direction to the first side plate portion 220. The second side plate portion 230 has an opening 231 in a portion close to the support plate portion 210. A substantially U-shaped notch 232 is formed in a portion beyond the opening 231, and a contact piece (other end portion) 233 bent toward the outside of the terminal pin 200 is formed inside the notch 232.

[0032] On the other hand, as shown in FIG. 8, a through hole 160a is formed between the outer annular portion 161 and the inner annular portion 162 of the inner flange portion 169, penetrating in the axial direction. A convex portion 169a is formed at the approximate center of the inner flange portion 169, protruding axially upward. An engagement portion 169b is formed radially outwardly protruding from the inner flange portion 169 to the inner annular portion 162, which extends axially downward, on the radially outer side, and an inclined surface 169c is formed adjacent to the engagement portion 169b. The terminal pin 200 is fixed to the end cap 160 by inserting its second side plate portion 230 into the through hole 160a, fitting the convex portion 169a into the opening 211 formed in the support plate portion 210, and engaging the opening 231 formed in the second side plate portion 230 with the engagement portion 169b.

[0033] In this state, the second side plate portion 230 of the terminal pin 200 is disposed between the inner annular portion 162 of the end cap 160 and the inner peripheral surface of the housing 131 , and the contact piece 233 is in elastic contact with the inner peripheral surface of the housing 131 .

[0034] 8(C), a protrusion 169d is formed on the upper surface of the inner flange portion 169 at a position on the first side plate portion 220 side, protruding toward the support plate portion 210. This protrusion 169d lifts the right end portion of the support plate portion 210 of the terminal pin 200 upward, and the terminal pin 200 is biased in the counterclockwise direction in the figure. As a result, the second side plate portion 230 of the terminal pin 200 is pressed against the inner annular portion 162 of the end cap 160.

[0035] As shown in FIG. 5, the pin portion 222 of the terminal pin 200 is passed through a through hole 144a formed in the circuit board 144 and is joined by solder 144b on the opposite mounting surface. The through hole 144a is connected to a GND pattern (solid pattern) formed on the circuit board 144. Here, GND indicates a potential that is a reference for the voltage in the circuit, and the GND circuit indicates a circuit that brings about that potential. In the case of this embodiment, a structure called a frame GNG (ground) is used, and the potential that is the reference for all circuits is unified to the housing 131. In addition, the inner annular portion 162 of the end cap 160 is disposed on the outer periphery side of the jumper 143a of the coil 143, and the housing 131 is disposed on the outer periphery side of the inner annular portion 162. That is, the housing 131 and the jumper 143a face each other in the radial direction via the inner annular portion 162. In this way, the inner annular portion 162 can prevent the jumper 143a and the housing 131 from coming into contact with each other and causing a short circuit.

[0036] Here, the mounting structure of the end cap 160 will be described with reference to Fig. 5. As shown in Fig. 5, a boss portion 112b that protrudes downward in the figure is formed near the opening of the lower casing 112. The boss portion 112b penetrates a through hole 131c formed in the flange portion 131b of the housing 131 and a through hole 164a formed in the flange portion 164 of the end cap 160, protruding downward, and has a head portion 112c whose lower end is thermally caulked to press against the flange portion 164. With this configuration, the end cap 160 is joined to the lower casing 112.

[0037] A resin cover 170 is attached to the end cap 160 to prevent dust, foreign matter, and the like from entering the inside of the motor 130. The cover 170 is in a substantially circular cup shape, and its peripheral portion 171 extends in the axial direction. As shown in FIG. 2, the peripheral portion 171 of the cover 170 is formed with a plurality of (three in this example) flange portions 172 that protrude radially outward, and screws 173 are inserted into the flange portions 172. The peripheral portion 171 of the cover 170 is then pressed in the axial direction along the outer periphery of the outer annular portion 161 of the end cap 160, and the screws 173 are screwed into the lower casing 112, whereby the cover 170 is detachably attached to the end cap 160.

[0038] 4.How to assemble a centrifugal blower i) Attaching the terminal pin to the end cap In Figure 8 (B), when the second side plate portion 230 of the terminal pin 200 is inserted into the through hole 160a formed between the outer annular portion 161 and the inner annular portion 162, the second side plate portion 230 rides up the inclined surface 169c of the end cap 160, and then the engagement portion 169b fits into the opening 231 of the second side plate portion 230, and at the same time, the convex portion 169a of the inner flange portion 169 fits into the opening 211 of the support plate portion 210, thereby fixing the terminal pin 200 to the end cap 160.

[0039] ii) Bonding the circuit board to the end cap 4, and the fixing pins 168a of the projections 168 are inserted into the through holes (not shown) of the circuit board 144, and then the fixing pins 168a are swaged and fixed on the opposite mounting surface. This joins the end cap 160 and the circuit board 144. At the same time as this insertion operation, the angular ends of the multiple connector pins 167 are inserted into the through holes (not shown) from the mounting surface side of the circuit board 144. Then, the tips of the connector pins 167 protruding from the opposite mounting surface of the circuit board 144 are connected with solder.

[0040] 5, the angular pin portion 222 of the terminal pin 200 is inserted into the through hole 144a formed in the circuit board 144 and connected to the GND pattern. The pin portion 222 of the terminal pin 200 protruding from the opposite mounting surface of the circuit board 144 is connected with the solder 144b.

[0041] iii) Connection between the motor and the end cap The terminals 143c of the coils 143 wound around the stator 140 of the motor 130 are bundled and twisted together to form a common line coupling portion. The terminals 143c of the coils 143 constituting this common line coupling portion are soldered together and cut to a predetermined length. This soldered common line coupling portion is bent so as to be parallel to the axial direction and made to stand upright. The terminals 143c of the coils 143 of each phase are also bent so as to be parallel to the axial direction and made to stand upright.

[0042] Each terminal 143c of the coil 143 is inserted into a predetermined through hole from the opposite mounting surface of the circuit board 144, and the common line coupling portion is housed in a pocket portion 163 formed in the end cap 160, protruding from a notch formed in the outer periphery of the circuit board 144 to the mounting surface side. The above operation is performed by bringing the end cap 160 to which the circuit board 144 is coupled and the housing 131 of the motor 130 close to each other. Then, the tips of each terminal 143c of the coil 143 protruding to the mounting surface side are connected with solder 145.

[0043] By the above operation, the contact piece 233 of the terminal pin 200 comes into contact with the inner peripheral surface of the housing 131. As shown in Fig. 5, the contact piece 233 of the terminal pin 200 protrudes radially outward in an unloaded state, but by pushing the contact piece 233 into the gap between the outer annular portion 161 of the end cap 160 and the housing 131, the contact piece 233 is pushed radially inward by the housing 131 and elastically abuts against the inner peripheral surface of the housing 131. As a result, the GND pattern of the circuit board 144 is set to the reference potential (for example, zero volts).

[0044] iv) Connection between motor and lower casing 3, the motor 130 to which the end cap 160 and the circuit board 144 are coupled is inserted from below into the lower opening of the lower casing 112. At this time, as shown in FIG. 5, the boss portion 112b formed around the opening of the lower casing 112 is inserted into the through hole 131c formed in the flange portion 131b of the housing 131 and the through hole 164a formed in the flange portion 164 of the end cap 160.

[0045] Then, the tip of the boss portion 112b protruding from the through hole 164a of the flange portion 164 of the end cap 160 is heated and expanded to cause plastic deformation to form the head portion 112c. By forming the head portion 112c, the end cap 160 is joined to the lower casing 112.

[0046] v) Coupling of the impeller to the motor The impeller 120 is inserted into the upper opening of the lower casing 112, and the upper end of the shaft 151 is press-fitted into the bushing 125 of the impeller 120. Next, the upper casing 111 is attached to the lower casing 112.

[0047] According to the centrifugal blower 100 configured as above, the pin portion 222 of the terminal pin 200 extends toward the circuit board 144 and is connected to the GND pattern, the second side plate portion 230 of the terminal pin 200 is supported by the end cap 160, and the contact piece 233 is inserted between the inner peripheral surface of the housing 131 and the end cap 160 and is in contact with the inner peripheral surface of the housing 131, so that the reaction force acting on the terminal pin 200 during insertion is received by the inner annular portion 162 that exists in the direction of the reaction force. Therefore, the inconvenience of the support plate portion 210 of the terminal pin 200 being separated from the inner peripheral flange portion 169 can be avoided.

[0048] In particular, in the above embodiment, a protrusion 169d that protrudes toward the support plate portion 210 of the terminal pin 200 is formed at the end of the inner flange portion 169 on the first side plate portion 220 side of the terminal pin 200, so that the second side plate portion 230 of the terminal pin 200 is pressed against the outer annular portion 161 of the end cap 160, and the terminal pin 200 can be firmly supported by the inner flange portion 169 and the inner annular portion 162.

[0049] In addition, in the above embodiment, the inner flange portion 169 has a convex portion 169a protruding toward the support plate portion 210, and the support plate portion 210 of the terminal pin 200 has an opening 231 into which the convex portion 169a fits, thereby preventing radial positional deviation of the terminal pin 200.

[0050] In addition, in the above embodiment, an engagement portion 169b protruding radially outward is formed on the inner annular portion 162 continuous with the inner flange portion 169, and an opening 231 that engages with the engagement portion 169b is formed in the second side plate portion 230 of the terminal pin 200.Therefore, when the contact piece 233 of the terminal pin 200 is inserted between the inner surface of the housing 131 and the end cap 160, the reaction force acting on the terminal pin 200 can be reliably received by the engagement portion 169b.

[0051] Furthermore, in the above embodiment, a through hole 160a that penetrates in the axial direction is formed between the inner flange portion 169 and the outer annular portion 161, and the second side plate portion 230 of the terminal pin 200 is inserted into the through hole 160a, thereby preventing a decrease in the strength of the end cap 160.

[0052] 5. Example of changes The present invention is not limited to the above-described embodiment, and various modifications are possible as follows. i) In the above embodiment, the protrusion 169d is formed on the inner flange portion 169, but as shown in FIG. 10, the angle θ between the support plate portion 210 and the second side plate portion 230 can be set to be smaller than the angle between the inner flange portion 169 and the inner annular portion 162. This configuration can also be used in combination with the protrusion 169d. Even in this configuration, the support plate portion 210 and the second side plate portion 230 press the inner flange portion 169 and the inner annular portion 162 due to their spring properties, so that the terminal pin 200 can be firmly attached to the inner flange portion 169 and the inner annular portion 162.

[0053] ii) The terminal pin 200 may be flat rather than crank-shaped as in the above embodiment. iii) The terminal pin 200 can be molded integrally with the end cap 160. For example, the terminal pin 200 can be injection molded as an insert material such that the contact piece 233 and the pin portion 222 protrude from the end cap 160.

[0054] iv) The housing 131 is not limited to being made of metal, but may be made of, for example, conductive resin. v) The present invention is not limited to centrifugal fans as in the above-described embodiment, but can be applied to any rotating equipment having a motor, such as axial fans, sirocco fans, air conditioners, and vacuum cleaners.

[0055] The present invention can also be applied to a blower for supplying air to a fuel cell system. In this case, even if the fuel cell system vibrates (for example, when an on-vehicle fuel cell system vibrates due to the vehicle running), the GND terminal pin can be stably contacted with the motor housing, so the rotating device can be operated stably. [Industrial Applicability]

[0056] The present invention can be used in the industrial field of rotating equipment having a part rotated by a motor. [Explanation of symbols]

[0057] 100... centrifugal blower (rotating device), 110... casing, 111... upper casing, 111a... engagement portion, 112... lower casing, 112a... claw portion, 112b... boss portion, 112c... head portion, 113... flow path, 114... suction port, 115... discharge port, 116... fixed leg, 116a... collar, 120... impeller, 121... blade, 122... hub, 123... connecting ring, 124... boss portion, 124a... through hole, 125... bush, 130... motor 131...housing (cylindrical portion), 131a...boss portion, 131b...flange portion, 131c...through hole, 132...bearing holder, 133...ball bearing, 134...compression coil spring, 140...stator, 141...stator core, 141a...core back portion, 141b...teeth, 142...insulator, 142a...projection portion, 142b...groove, 143...coil, 143a...crossover wire, 143c...terminal, 144...circuit board, 1 44a...through hole, 144b...solder, 145...solder, 150...rotor, 151...shaft, 152...rotor yoke, 152a...boss portion, 153...rotor magnet, 151...shaft, 160...end cap, 160a...through hole, 161...outer annular portion, 161a...gap, 162...inner annular portion, 163...pocket portion, 164...flange portion, 164a...through hole, 164b...slit, 165...frame, 166...connector Housing, 167...connector pin, 168...protrusion, 168a...fixing pin, 169...inner flange portion, 169a...convex portion, 169b...engagement portion, 169c...inclined surface, 169d...protrusion, 170...cover, 171...periphery, 200...terminal pin, 210...support plate portion (support portion), 211...opening, 220...first side plate portion, 222...pin portion, 230...second side plate portion (other end portion), 231...opening, 232...notch, 233...contact piece (other end portion).

Claims

1. A motor; a housing made of a conductive material and having a cylindrical portion for accommodating the motor; an end cap disposed opposite an inner circumferential surface of the cylindrical portion; A circuit board on which a GND circuit is formed; A terminal pin and Equipped with One end of the terminal pin extends toward one axial end and is connected to the GND circuit, The other end of the terminal pin extends toward the other end in the axial direction and is supported by the end cap, the other end of the terminal pin is disposed between an inner circumferential surface of the cylindrical portion of the housing and the end cap, The other end of the terminal pin is in contact with an inner circumferential surface of the cylindrical portion.

2. The rotating device according to claim 1 , wherein the other end of the terminal pin has a spring property.

3. The end cap includes an outer annular portion that configures an outer periphery, and an inner annular portion that is disposed radially inward of the outer annular portion, The inner annular portion includes an inner circumferential flange portion that protrudes radially inward, the terminal pin includes a support portion extending radially between the one end and the other end of the terminal pin and supported by the inner circumferential flange portion, The other end of the terminal pin extends axially from the support portion along the inner annular portion, The rotating device according to claim 1 , wherein an angle between the support portion and the other end portion is smaller than an angle between the inner circumferential flange portion and the inner annular portion.

4. an end portion of the inner circumferential flange portion on the side of the one end portion of the terminal pin includes a protrusion protruding toward the support portion, The rotating device according to claim 3 , wherein the protrusion contacts the support portion.

5. The rotating device according to claim 3 , wherein the inner circumferential flange portion includes a protrusion protruding toward the support portion, and the support portion includes an opening into which the protrusion fits.

6. 4. A rotating device as described in claim 3, wherein an engaging portion protruding radially outward is provided on the inner flange portion or the inner annular portion continuous with the inner flange portion, and an opening for engaging with the engaging portion is provided on the other end of the terminal pin.

7. The rotating device according to claim 3 , wherein a through hole is provided between the inner peripheral flange portion and the outer annular portion, penetrating in the axial direction, and the other end of the terminal pin is disposed in the through hole.

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