JP2018026938A - Terminal part and motor and drain valve driving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a possibility that a terminal contacts with a liquid when the liquid enters into a case in a terminal part in which the terminal is disposed in the case.SOLUTION: A drain valve driving device includes a motor (a geared motor) for driving a wire which is a drain valve driving member. The geared motor includes a terminal part 50 for supplying electric power to a motor part which is a driving source. The terminal part 50 includes: a terminal 60; a terminal holding part 52 which holds the terminal 60; and a terminal housing part 51 covering the terminal holding part 52. The terminal housing part forms a part of an exterior case. A drain gap G communicating with an opening 217 provided at the terminal housing part 51 is provided between the terminal holding part 52 and the terminal housing part 51 (i.e., between the terminal holding part 52 and the exterior case). A liquid spilling on the terminal holding part 52 flows along the gap G to be discharged from the opening 217.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a terminal portion for holding a terminal in a case, and a motor and a drain valve driving device including this type of terminal portion.

  In order to drive a drain valve of a washing machine or the like, a geared motor that transmits a driving force of a motor to an output member by a transmission wheel train is used. This type of geared motor includes a motor including a rotor and a stator, a transmission wheel train, and a case that houses the motor and the transmission wheel train. Based on the rotation of the output gear of the transmission wheel train, the output member arranged outside the case is driven, and the drain valve is driven. Patent Document 1 discloses a drain valve driving device including this type of geared motor.

JP 2016-29993 A

  In Patent Document 1, a terminal for supplying power to a motor coil is held in a case, and the tip of the terminal is disposed in a connector portion provided on a side surface of the case. As described above, in a structure in which the terminal is held in the case, when a liquid such as water enters the inside through a joint of the case, the liquid that has entered may reach the terminal. For example, there is a possibility that the liquid is accumulated in the terminal holding member and the liquid contacts the terminal. If the terminal is energized in such a state, there is a risk that a discharge will occur at the location where the liquid has accumulated and a spark will occur. And generation | occurrence | production of such a spark may have various bad influences.

  In view of the above, the problem of the present invention is to provide a spark when energized by reducing the risk of contact between the terminal and the liquid when the liquid enters the case in the terminal portion where the terminal is disposed in the case. It is to suppress the occurrence of.

  In order to solve the above problems, a terminal portion of the present invention includes a terminal, a terminal holding portion that holds the terminal, and an outer case that covers the terminal holding portion, and the terminal holding portion and the outer case. A gap for drainage communicating with an opening provided in the outer case is provided between the first and second cases.

  According to the present invention, the liquid that has entered from the joint of the outer case can be discharged out of the case through the drainage gap. Therefore, contact between the terminal and the liquid can be suppressed. Therefore, it is possible to reduce the risk of sparks occurring when energized.

  In the present invention, the terminal holding part preferably includes a plurality of terminal attaching parts to which the terminals are attached, and a recess or a convex part is provided between the adjacent terminal attaching parts. In this way, since the distance between the terminals can be increased, the possibility of occurrence of a short circuit between the terminals can be reduced. In addition, by providing portions having different heights such as concave portions and convex portions between the terminal mounting portions, it is possible to reduce the possibility that the liquid applied between the terminal mounting portions contacts the terminals.

  In the present invention, it is preferable that the outer case includes a reinforcing portion that reinforces the opening. If it does in this way, the intensity of the portion provided with the opening can be secured. Therefore, when attaching or detaching the connector for connection with the terminal to / from the opening, it is possible to reduce the risk of placing a burden on the case.

  In the present invention, it is desirable that the reinforcing portion supports the terminal holding portion. If it does in this way, while positioning a terminal holding part by a reinforcement part, when attaching or detaching the connector for a connection with a terminal to opening, a possibility that a burden may be applied to a terminal holding part can be decreased.

  In the present invention, it is desirable that the terminal holding part has a drain hole. If it does in this way, the water applied to the terminal holding part can be discharged from the drain hole.

  In the present invention, the terminal holding portion includes a drain hole, and the reinforcing portion includes a through portion that overlaps the drain hole when viewed in a direction in which the drain hole penetrates the terminal holding portion. It is desirable. For example, it is preferable that the reinforcing portion includes two reinforcing plates that span the opening and a connecting portion that connects the two reinforcing plates, and the through portion is a gap between the two reinforcing plates. . Thus, by providing a gap in the reinforcing portion, the liquid that has flowed into the drain hole can be easily discharged.

  In the present invention, it is preferable that the terminal holding portion includes a terminal insertion slot into which the terminal is inserted and a terminal guide portion that guides the terminal toward the terminal insertion slot. If it does in this way, damage to a terminal at the time of attaching a terminal to a terminal holding part can be controlled. Also, the terminal mounting operation is easy.

  In the present invention, it is preferable that the terminal holding part is molded integrally with a coil bobbin around which a coil is wound. If it does in this way, when comprising an apparatus provided with a coil and a terminal part, an assembly of an apparatus can be performed easily.

  In the present invention, it is preferable that the terminal holding portion is fixed to the outer case via the coil bobbin. If it does in this way, the attachment error at the time of fixing a coil bobbin can be absorbed within the limits of the gap for drainage. Therefore, positioning during assembly is easy.

  In the present invention, it is desirable that the terminal holding portion includes a terminal cover that covers the terminal. If it does in this way, the contact with the liquid and terminal which applied to the terminal holding part with the terminal cover can be controlled.

  In the present invention, it is desirable that there is a step on the upper surface of the terminal cover. If it does in this way, it can control that a liquid accumulates on a terminal cover.

  In the present invention, it is preferable that the terminal cover is connected to a flange portion of the coil bobbin, and a step is provided between the terminal cover and the flange portion. If it does in this way, the penetration | invasion of the liquid to the coil bobbin side can be suppressed.

  In the present invention, it is desirable that the terminal holding part has a drain hole. If it does in this way, the water applied to the terminal holding part can be discharged from the drain hole.

  Next, a motor according to the present invention includes the terminal portion described above and a coil that is housed in the outer case and is fed with power through the terminal.

  In addition, a drain valve driving device of the present invention includes the above motor and a drain valve driving member driven by the motor.

  According to the terminal portion of the present invention, the liquid that has entered through the joint of the outer case can be discharged out of the case through the gap for drainage. Therefore, contact between the terminal and the liquid can be suppressed. Therefore, it is possible to reduce the risk of sparks occurring when energized.

It is a perspective view of the drain valve drive device to which the present invention is applied. It is a disassembled perspective view of the drain valve drive device to which the present invention is applied. It is the disassembled perspective view which looked at the geared motor which removed the 2nd case from the + Z direction side. It is the disassembled perspective view which looked at the geared motor which removed the 2nd case from the -Z direction side. It is a disassembled perspective view of a motor. It is a disassembled perspective view of a coil bobbin, a bobbin case, and a terminal. It is a top view of a 1st case and a motor part. It is a cross-sectional perspective view of a terminal part. It is sectional drawing of a 1st case and a motor part.

(overall structure)
Hereinafter, embodiments of a terminal portion, a motor, and a drain valve driving device to which the present invention is applied will be described. FIG. 1 is a perspective view of a drain valve driving device to which the present invention is applied, and FIG. 2 is an exploded perspective view of the drain valve driving device to which the present invention is applied. The drain valve driving device 1 includes a wire 10 that is a drain valve driving member for driving a drain valve (not shown), a pulley 11 to which one end of the wire 10 is fixed, a geared that rotates the pulley 11 and winds the wire 10. A motor 2 is provided. The geared motor 2 includes an outer case 20, a motor unit 30 accommodated in the outer case 20, and a transmission wheel train 40 that transmits the driving force of the motor unit 30 to the pulley 11.

  The transmission wheel train 40 includes an output pinion 41 disposed in an opening formed in the outer case 20. The output pinion 41 is in mesh with the pulley 11 disposed outside the outer case 20. The pulley 11 is screwed into a screw hole formed at the center of the output pinion 41 by a fixing screw 14. A covering case 12 that covers the pulley 11 is attached to the outer case 20. The covering case 12 is fixed to the outer case 20 by three fixing screws 13.

  The transmission wheel train 40 includes a rotor pinion (not shown), a planetary gear mechanism 42, a reduction gear train 43, and an output gear 44. Although details are omitted, the transmission wheel train 40 transmits the driving force of the motor unit 30 in this order. The output pinion 41 is coaxially attached to the center of the output gear 44 and rotates integrally with the output gear 44. Accordingly, the wire 10 as the drain valve driving member is driven based on the rotation of the output gear 44.

  In the state where the wire 10 is wound around the pulley 11 by a predetermined amount, the drain valve driving device 1 continues to energize the motor unit 30 that is a driving source and holds the pulley 11 at the winding position. Thereby, the valve body of the drain valve connected to the wire 10 is held at a position away from the drain port. Further, the drain valve driving device 1 stops energization to the motor unit 30 and releases the holding state of the pulley 11. As a result, the wire 10 can be pulled out by an external force. For example, when the wire 10 is pulled out by an urging force such as a spring force connected to the valve body of the drain valve, the drain port is closed by the valve body.

  In this specification, the rotation axis direction of the pulley 11 is defined as a third direction Z, and two directions orthogonal to the third direction Z are defined as a first direction X and a second direction Y. Also, one side of the first direction X is the + X direction, the other side is the -X direction, one side of the second direction Y is the + Y direction, the other side is the -Y direction, and one side of the third direction Z is the + Z direction. The other side is the -Z direction. The drain valve driving device is arranged in such a posture that the + Z direction faces upward and the −Z direction faces downward.

  The drain valve driving device 1 includes a terminal unit 50 for supplying power to the motor unit 30 of the geared motor 2. The terminal portion 50 includes a terminal accommodating portion 51 formed on the side surface of the outer case 20, a terminal holding portion 52 disposed inside the terminal accommodating portion 51, and a terminal 60 held by the terminal holding portion 52. The terminal accommodating portion 51 protrudes outward (+ Y direction) from the side surface of the outer case 20. The terminal holding part 52 is formed integrally with a coil bobbin 33 and a bobbin case 36 (see FIGS. 5 and 6) that constitute a part of the motor part 30. That is, in the drain valve driving device 1 of the present embodiment, the outer case 20, the coil bobbin 33 and the bobbin case 36, and the terminal 60 constitute a unit with a terminal portion including the terminal portion 50. Details of the terminal unit 50 will be described later.

(Case)
The outer case 20 is divided into two in the third direction Z. The outer case 20 includes a first case 21 that is a divided case on the −Z direction side and a second case 22 that is a divided case on the + Z direction side. The motor unit 30 and the transmission wheel train 40 are accommodated between the first case 21 and the second case 22 except for the output pinion 41 that meshes with the pulley 11. The first case 21 includes a bottom plate 211 and a side plate 212 that rises in the + Z direction from the outer peripheral edge of the bottom plate 211. The second case 22 includes a bottom plate 211, an upper plate 221 facing the third direction Z, and a side plate 222 extending from the outer peripheral edge of the upper plate 221 in the −Z direction. The side plates 212 and 222 constitute the side surface of the outer case 20.

  3 and 4 are exploded perspective views of the geared motor 2 with the second case 22 removed, FIG. 3 is an exploded perspective view seen from the + Z direction side, and FIG. 4 is an exploded perspective view seen from the −Z direction side. is there. As shown in FIG. 3, the bottom plate 211 of the first case 21 includes a circular recess 213 and positioning pins 214 formed at two positions located on opposite sides of the circular recess 213. The positioning pin 214 protrudes from the bottom plate 211 in the + Z direction.

  As shown in FIGS. 1 and 2, the terminal accommodating portion 51 includes a first projecting portion 215 projecting in the + Y direction from the side plate 212 of the first case 21 and a first projecting portion 215 projecting in the + Y direction from the side plate 222 of the second case 22. It is comprised by 2 overhang | projection parts 223. The terminal accommodating portion 51 has a substantially rectangular planar shape when viewed in the third direction Z. The first projecting portion 215 extends in the third direction Z, and engagement protrusions 216 (see FIG. 4) are formed on the side surfaces on both sides in the first direction X. Hooks 224 that protrude in the −Z direction are formed on both edges of the second projecting portion 223 in the first direction X. When the first case 21 and the second case 22 are assembled by engaging the hook 224 and the engagement protrusion 216, the end portion in the + Z direction of the first overhang portion 215 is closed by the second overhang portion 223.

As shown in FIGS. 3 and 4, the first projecting portion 215 includes a first side plate 215 a facing the + Y direction, a second side plate 215 b facing the + X direction, and a third side plate 215 c facing the −X direction. As shown in FIG. 4, a substantially rectangular opening 217 is provided at the end of the first overhanging portion 215 on the −Z direction side. The terminal accommodating portion 51 includes a reinforcing portion 218 that reinforces the opening 217. The reinforcing portion 218 is bridged over the center of the opening 217. One end of the reinforcing part 218 is connected to the first side plate 215a, and the other end of the reinforcing part 218 is connected to the bottom plate 211. The reinforcing portion 218 includes two reinforcing plates 218a and 218b that extend linearly in the second direction Y, and a connecting portion 218b that connects the reinforcing plates 218a and 218b at the center in the second direction Y. The reinforcing plates 218a and 218b are plate-like members having a predetermined length in the third direction Z, and are disposed with a predetermined gap in the first direction X. Therefore, a penetration part 219 that penetrates the reinforcement part 218 in the third direction Z is formed between the reinforcement plates 218a and 218b. The penetration part 219 is formed on both sides in the second direction Y of the coupling part 218b.

(Motor part)
FIG. 5 is an exploded perspective view of the motor unit 30. The motor unit 30 includes a cup-shaped motor case 31, a cover plate 32 attached to the end of the motor case 31 on the + Z direction side, an annular coil bobbin 33, and a stator coil 34 wound around the coil bobbin 33 (see FIG. 6, and FIG. 9), a rotor 35 disposed on the inner peripheral side of the coil bobbin 33, and a bobbin case 36 disposed inside the motor case 31 and accommodating the coil bobbin 33 and the stator coil 34.

  FIG. 6 is an exploded perspective view of the coil bobbin 33, bobbin case 36, and terminal 60. The coil bobbin 33 and the bobbin case 36 are made of resin. The coil bobbin 33 includes a body portion 331 around which the stator coil 34 is wound, a flange portion 332 formed at an end portion of the body portion 331 in the −Z direction, and a flange formed at an end portion of the body portion 331 in the + Z direction. Part 333 is provided. The coil bobbin 33 is integrally formed with a terminal cover 54 that protrudes in the + Y direction from the outer peripheral edge of the annular flange portion 333. In the terminal cover 54, two covering portions 541 that cover the base end portion 61 of the terminal 60 are formed side by side in the first direction X. The terminal cover 54 is formed with a binding pin 549 that protrudes from the side surface in the + X direction. The binding pin 549 is used for binding a coil wire drawn from the stator coil 34.

  The bobbin case 36 includes a cylindrical portion 361 that surrounds the outer peripheral side of the coil bobbin 33 and an annular portion 362 that is connected to an end portion of the cylindrical portion 361 in the −Z direction. The bobbin case 36 is integrally formed with a terminal block 53 that protrudes in the + Y direction from the edge in the + Z direction of the cylindrical portion 361. Two terminal mounting portions 531 for holding the terminals 60 are formed in the terminal block 53 side by side in the first direction X. The terminal block 53 and the terminal cover 54 formed on the coil bobbin 33 constitute a terminal holding portion 52 that holds the two terminals 60. In the terminal block 53, an upper end surface 53d facing the + Z direction is formed in each of the two terminal attachment portions 531. Further, an inclined surface 53e is formed on the entire periphery along the outer peripheral edge of the upper end surface 53d. The inclined surface 53e is formed at a corner portion connecting side surfaces 53a, 53b, 53c of the terminal block 53, which will be described later, and the upper end surface 53d, and a first projecting portion 215 provided on the terminal holding portion 52 and the first case 21. It inclines toward the gap G. Further, as shown in FIG. 4, each of the two terminal attachment portions 531 includes an opening 532 that opens in the −Z direction.

  As shown in FIG. 6, the terminal 60 includes a substantially planar base end portion 61, a coil wire connection portion 62 that is bent and extends in the −Z direction from the center in the first direction X of the base end portion 61, and a base end The connection part 63 extended in the + Y direction from the part 61, and the connector connection part 64 bent and extended in the -Z direction from the edge of the -X direction of the connection part 63 are provided. The terminal 60 is attached to the coil bobbin 33 by inserting the base end portion 61 into the covering portion 541. When the coil bobbin 33 is assembled to the bobbin case 36, the connector connection portion 64 of the terminal 60 is inserted into the terminal attachment portion 531 of the terminal block 53.

FIG. 7 is a plan view of the first case 21 and the motor unit 30. 8 is a cross-sectional perspective view of the terminal portion (cross-sectional perspective view at position AA in FIG. 7), and FIG. 9 is a cross-sectional perspective view of the first case and the motor portion (cross-section at position BB in FIG. 7). Perspective view). As shown in FIGS. 4 and 8, the distal end of the connector connecting portion 64 is located in an opening 532 provided at the distal end of the terminal attachment portion 531 in the −Z direction. When the motor unit 30 is assembled to the outer case 20, the opening 532 of the terminal attachment unit 531 is positioned in the opening 217 formed in the terminal accommodating unit 51. Accordingly, the tip end of the connector connecting portion 64 is exposed to the outside from the opening 532. A connector (not shown) connected to an external power source from the opening 217 side is attached to the terminal portion 50. Thereby, the terminal on the external power supply side and the terminal 60 can be brought into contact with each other.

  When the motor unit 30 is assembled, as shown in FIG. 5, the coil bobbin 33 around which the stator coil 34 is wound and the bobbin case 36 are assembled to form an assembly in which the terminal 60 is attached. Thereafter, this assembly is fitted inside the motor case 31 with the rotor 35 assembled thereto, and the cover plate 32 is assembled to the motor case 31 and fixed to the first case 21. The motor case 31 includes a notch 311 in which a position (an edge in the + Y direction) facing the terminal accommodating portion 51 formed in the first case 21 is notched. Further, the cover plate 32 includes a notch 323 in which a position corresponding to the notch 311 of the motor case 31 is linearly cut. In the notches 311, 323, terminal holding portions 52 (a terminal block 53 formed on the bobbin case 36 and a terminal cover 54 formed on the coil bobbin 33) are arranged.

  The cover plate 32 includes a disk portion 321 having substantially the same diameter as the motor case 31. A through hole 322 in which the rotor 35 is disposed is formed in the center of the disc portion 321. In addition, on the outer edge of the disc portion 321, fixing portions 324 protruding outward in the radial direction are formed at two locations separated by 180 degrees. The fixing portion 324 is formed with a positioning hole 325 into which the above-described positioning pin 214 of the first case 21 can be inserted. The cover plate 32 is assembled to the motor case 31 by fitting a fixing portion 324 into a notch 312 formed at the upper end edge of the motor case 31. As shown in FIG. 7, the motor unit 30 is positioned in the first case 21 via the positioning holes 325 of the cover plate 32 and the positioning pins 214 of the first case 21.

  The motor case 31 and the cover plate 32 are made of a magnetic plate. As shown in FIG. 5, the cover plate 32 is formed with pole teeth 326 that bend and extend in the −Z direction from the edge of the through hole 322 in which the rotor 35 is disposed. The motor case 31 has pole teeth 313 formed by cutting and raising the bottom of the motor case 31 and bending it in the + Z direction. The pole teeth 326 provided on the cover plate 32 and the pole teeth 313 cut and raised from the motor case 31 are alternately arranged in the circumferential direction and face the outer circumferential surface of the magnet 352 provided on the rotor 35 in the radial direction. That is, the motor case 31 and the cover plate 32 also serve as a stator core.

  -Z direction end portions of a plurality of fixed shafts that rotatably support gears constituting the transmission wheel train 40 are press-fitted into the cover plate 32. Ends in the + Z direction of these fixed shafts are fixed to the second case 22 by press fitting or the like. A fixed shaft 351 that rotatably supports the rotor 35 is disposed in the center of the rotor 35. The fixed shaft 351 extends in the third direction Z. One end of the fixed shaft 351 is fixed to the motor case 31 by press fitting or the like, and the other end of the fixed shaft 351 is fixed to the second case 22 by press fitting or the like.

  As shown in FIG. 9, the rotor 35 includes a substantially cylindrical magnet 352, a guide rotator 353 disposed on the inner peripheral side of the magnet 352, and a shaft portion 354 disposed on the inner peripheral side of the guide rotator 353. Is provided. The shaft portion 354 is made of resin, and the magnet 352 is fixed to the shaft portion 354. A fixed shaft 351 is attached to the center of the shaft portion 354. A clutch pawl is formed at the tip of the shaft portion 354. The clutch pawl constitutes a clutch mechanism that disconnects connection with a rotor pinion (not shown). The induction rotating body 353 includes a cylindrical metal portion 353a made of a nonmagnetic metal, and a resin portion 353b provided on the inner peripheral side of the metal portion 353a. When the rotor 35 rotates, a magnetic induction force is generated between the magnet 352 and the metal portion 353a. The induction rotating body 353 and the rotor 35 rotate together by this magnetic induction force.

(Terminal drainage structure)
In this embodiment, the terminal holding part 52 is covered from the outside by the terminal accommodating part 51 of the outer case 20, and a drainage gap G is provided between the terminal holding part 52 and the outer case 20. More specifically, as shown in FIG. 7, the terminal holding portion 52 includes a terminal block 53, and the outer peripheral side of the terminal block 53 is viewed from three directions by the first overhanging portion 215 provided in the first case 21. being surrounded. As shown in FIGS. 3 and 5, the terminal block 53 includes a first side surface 53 a facing the + Y direction, a second side surface 53 b facing the + X direction, and a third side surface 53 c facing the −X direction. Further, as described above, the first projecting portion 215 includes the first side plate 215a, the second side plate 215b, and the third side plate 215c.

  As shown in FIG. 7, when the motor unit 30 is attached to the first case 21, the first side plate 215 a extends along the first side surface 53 a of the terminal block 53. The second side plate 215 b extends along the second side surface 53 b of the terminal block 53, and the third side plate 215 c extends along the third side surface 53 c of the terminal block 53. A gap G for drainage is formed between the first side plate 215a and the first side surface 53a (see FIG. 9). Further, a drainage gap G is also formed between the second side plate 215b and the second side surface 53b and between the third side plate 215c and the third side surface 53c (see FIG. 8). That is, a gap G is formed between the terminal block 53 and the first overhanging portion 215 in all three directions of the + Y direction, the + X direction, and the −X direction.

  The first projecting portion 215 includes an opening 217 (see FIG. 4) that opens at an end in the −Z direction, and the above-described gap G in the three directions communicates with the opening 217. Further, as described above, the inclined surface 53e is formed on the outer peripheral edge of the terminal holding portion 52 along the outer peripheral edge of the upper end surface 53d of the terminal base 53, and the inclined surface 53e is inclined toward the gap G. To do. Accordingly, when a liquid such as water enters between the first case 21 and the second case 22 and hits the terminal holding portion 52, the liquid flows toward the gap G. Therefore, the liquid can be discharged from the gap G.

  Next, the drainage structure of the terminal block 53 formed integrally with the bobbin case 36 will be described. As shown in FIGS. 6 to 9 and the like, the terminal block 53 is formed with a connecting portion 533 that connects adjacent terminal attaching portions 531. The connecting portion 533 has a concave shape that is recessed in the −Z direction with respect to the upper end surface 53 d of the terminal mounting portion 531. When such a connection part 533 is provided, the liquid applied to the terminal block 53 flows down from the terminal attachment part 531 to the connection part 533, so that there is little possibility that the liquid accumulates on the terminal attachment part 531 and contacts the terminal 60. The connecting portion 533 is formed with a positioning hole 539 for positioning the member. As shown in FIG. 9, the positioning hole 539 passes through the terminal block 53 in the third direction Z. That is, the positioning hole 539 functions as a drain hole for discharging the liquid accumulated in the connecting portion 533.

  As shown in FIGS. 8 and 9, the connecting portion 533 is supported from the −Z direction side by the reinforcing portion 218 provided in the opening 217. That is, the terminal holding part 52 is positioned in the third direction Z when the connecting part 533 of the terminal block 53 comes into contact with the reinforcing part 218. Therefore, the terminal holding part 52 is supported from the −Z direction side by the first projecting part 215 of the first case 21 via the reinforcing part 218. Further, the positioning hole 539 formed in the connecting portion 533 is disposed at a position overlapping with the through portion 219 provided in the reinforcing portion 218 in the third direction Z. For this reason, the reinforcing part 218 can smoothly discharge the liquid discharged from the positioning hole 539 from the through part 219 when the positioning hole 539 functions as a drain hole.

As shown in FIG. 6, the terminal block 53 includes a connecting portion 534 that connects the terminal attaching portion 531 and the edge of the tubular portion 361 of the bobbin case 36, and the connecting portion 534 and the terminal attaching portion 531 are connected to each other. A rib 535 protruding in the + Z direction is formed therebetween. Therefore, there is little possibility that the liquid applied to the terminal attachment portion 531 enters the cylindrical portion 361 side of the bobbin case 36 from the connecting portion 534. Further, the connecting portion 534 includes a flat portion extending in an arc shape along the edge of the cylindrical portion 361 and a recess formed on the outer side in the radial direction of the arc-shaped portion. A through hole 536 is formed. Accordingly, the liquid applied to the connecting portion 534 flows down into the recess and is discharged in the −Z direction from the through hole 536, so that there is little possibility that the liquid accumulates on the connecting portion 534 and enters the cylindrical portion 361 side. .

  A terminal insertion port 537 into which the connector connecting portion 64 of the terminal 60 is inserted is formed at the center of the upper end surface 53d of the terminal mounting portion 531. The terminal insertion port 537 extends in the second direction Y. On both sides of the terminal insertion port 537 in the first direction X, terminal guide portions 538 extending in the second direction Y along the edge of the terminal insertion port 537 are formed. The terminal guide portion 538 includes an inclined surface that is inclined toward the terminal insertion port 537. When the connector connection portion 64 is inserted into the terminal insertion port 537, the connector connection portion 64 is guided from both sides to the inclined surface of the terminal guide portion 538 and inserted into the terminal insertion port 537.

  Subsequently, a drainage structure of the terminal cover 54 formed integrally with the coil bobbin 33 will be described. As shown in FIG. 6, a step is provided on the upper surface (the surface facing the + Z direction) of the terminal cover 54. Specifically, the two covering portions 541 to which the base end portion 61 of the terminal 60 is attached both protrude in the + Z direction from the flange portion 333 of the coil bobbin 33, but between the adjacent covering portions 541. Is provided with a recess 542 that is recessed in the −Z direction with respect to the covering portion 541. A rib 543 protruding in the + Z direction is formed between the recess 542 and the flange portion 333. The rib 543 protrudes in the + Z direction from the flange portion 333 in the same manner as the covering portion 541. As described above, if the concave portion 542 is provided on the upper surface of the terminal cover 54, the water applied to the upper surface of the covering portion 541 that covers the terminal 60 does not collect on the covering portion 541 and flows down to the concave portion 542. Further, it is possible to prevent the liquid that has flowed down into the recess 542 by the rib 543 from entering the flange portion 333.

  On the edge of the terminal cover 54 in the + Y direction, a groove 544 that is recessed in the −Y direction is formed between the two covering portions 541. The groove portion 544 overlaps the through hole 536 of the terminal block 53 described above in the third direction Z. Therefore, when the liquid applied to the terminal cover 54 flows down to the groove portion 544, the liquid is discharged through the through hole 536 located in the −Z direction.

  The applicant of the present application prototyped the drain valve driving device 1 including the terminal portion 50 according to the present embodiment and confirmed the drainability of the terminal portion 50. As a result, it was confirmed that when liquid was applied to the vicinity of the terminal 60, the liquid was discharged through the gap G between the terminal holding portion 52 and the outer case 20. Moreover, it was confirmed that the positioning operation | work at the time of incorporating the motor part 30 in the 1st case 21 is facilitated.

(Main effects of the present invention)
As described above, the drain valve driving device 1 of the present embodiment includes the motor (geared motor 2) that drives the wire 10 that is a drain valve driving member. The geared motor 2 includes a motor unit 30 that is a drive source, a transmission wheel train 40, and a terminal unit 50 for supplying power to the motor unit 30. The terminal part 50 includes a terminal 60, a terminal holding part 52 that holds the terminal 60, and a terminal accommodating part 51 that covers the terminal holding part 52. In this embodiment, the terminal accommodating portion 51 constitutes a part of the outer case 20. Between the terminal holding part 52 and the terminal accommodating part 51 (that is, between the terminal holding part 52 and the outer case 20), a gap G for drainage communicating with the opening 217 provided in the terminal accommodating part 51 is provided. It has been.

With this configuration, the terminal portion 50 according to the present embodiment can discharge the liquid that has entered the case from the joint of the outer case 20 to the outside of the case through the gap G for drainage. Therefore, contact between the terminal 60 and the liquid can be suppressed. Thereby, generation | occurrence | production of the spark at the time of electricity supply can be suppressed, and the inconvenience resulting from generation | occurrence | production of a spark can be suppressed. For example, it is possible to reduce the possibility that the resin that has become hot due to the heat of the spark melts and the terminal holding part and the terminal fall off. Further, it is possible to reduce the possibility that the terminal holding portion is deformed or broken due to the deterioration of the resin. further,
It is possible to reduce the possibility that the resin forming the terminal holding portion is carbonized by the spark and a track serving as a short-circuit path is formed to cause a short circuit between the terminals.

  In this embodiment, the gap G for drainage is provided in all directions facing the outer case 20 in the outer periphery of the terminal holding portion 52. Specifically, the gap G is provided along all of the first side surface 53a, the second side surface 53b, and the third side surface 53c facing the + Y direction, the + X direction, and the −X direction on the outer peripheral surface of the terminal block 53. Therefore, even if the liquid flows in any of these three directions, the liquid can be discharged and the contact between the liquid and the terminal 60 can be suppressed. In addition, you may provide the clearance gap G only in any one direction or two directions among these three directions. For example, the gap G may be provided along the second side surface 53b and the third side surface 53c facing the + X direction and the −X direction. In addition, since the inclined surface 53e is formed on the entire periphery along the outer peripheral edge of the upper end surface 53d of the terminal attachment portion 531, the liquid applied to the terminal attachment portion 531 can flow toward the gap G. Therefore, the liquid can be discharged smoothly.

  The terminal holding part 52 of this embodiment holds a plurality of terminals 60 and has a structure in which it is difficult to form a short circuit path (track) due to contact with liquid between the terminals. Specifically, a connecting portion 533 is provided between adjacent terminal attachment portions 531. Thus, if the terminal attaching part 531 is separated by the connection part 533, the distance between terminals can be enlarged. Therefore, the short circuit path between the terminals can be made difficult. Moreover, although the connection part 533 of this form is a recessed part, you may provide a convex part instead of a recessed part. Thus, by providing a step such as a concave portion or a convex portion between the portions to which the terminals 60 are attached, it is difficult to form a path for short-circuiting between the terminals. Therefore, the possibility of occurrence of tracking (short circuit between terminals due to tracks formed by sparks or the like) can be reduced.

  In the outer case 20 of this embodiment, a reinforcing portion 218 is provided in an opening 217 communicating with the gap G for drainage. If it does in this way, the intensity | strength of the site | part in which the opening 217 was provided is securable. That is, in this embodiment, the strength of the first overhanging portion 215 provided in the first case 21 can be ensured. Therefore, when the connector connected to the external power source or the like is attached to or detached from the terminal portion 50 through the opening 217, the possibility of the member being bent can be reduced. Therefore, it is possible to reduce the risk of placing a burden on the site where the opening 217 is provided. Further, the terminal holding portion 52 is supported from the −Z direction side by the reinforcing portion 218 provided in the opening 217. Therefore, it is possible to reduce the possibility that the terminal holding portion 52 is burdened when the connector is attached or detached. Further, when the motor part 30 is assembled to the first case 21, the terminal holding part 52 can be positioned in the third direction Z by the reinforcing part 218.

  The terminal holding part 52 of this embodiment includes a terminal guide part 538 that guides the terminal 60 toward the terminal insertion port 537. The terminal guide portion 538 is provided with an inclined surface toward the terminal insertion port 537. By guiding the tip of the terminal 60 along such an inclined surface, damage to the terminal 60 when the terminal 60 is attached to the terminal attachment portion 531 can be suppressed. Moreover, the attachment work of the terminal 60 is easy.

  In this embodiment, a part of the terminal holding portion 52, specifically, the terminal cover 54 is molded integrally with the coil bobbin 33. Accordingly, when configuring an apparatus (in this embodiment, the geared motor 2 and the drain valve driving device 1) including the motor unit 30 including the coil bobbin 33 and the stator coil 34 and the terminal unit 50 that supplies power to the motor unit 30, the coil bobbin The terminal holding part 52 can be assembled | attached simultaneously by the operation | work which assembles 33 with another member. Therefore, the apparatus can be easily assembled. Note that the entire terminal holding portion 52 may be formed integrally with the coil bobbin 33 or the bobbin case 36.

The terminal holding part 52 of this embodiment is fixed to the outer case 20 via the coil bobbin 33. Specifically, the terminal holding portion 52 includes a terminal cover 54 provided on the coil bobbin 33 and a terminal block 53 provided on the bobbin case 36, but the coil bobbin 33 and the bobbin case 36 include the motor case 31. And the cover plate 32 are fixed to the first case 21 via the cover plate 32 in an assembled state (that is, the motor unit 30). In such a fixing method, the assembly error of the motor unit 30 with respect to the first case 21 can be absorbed within the range of the gap G between the outer case 20 and the terminal holding unit 52. Therefore, positioning when the motor unit 30 is assembled to the first case 21 is easy.

  Since the terminal holding part 52 of this embodiment includes the terminal cover 54 that covers the base end part 61 of the terminal 60, the contact between the liquid and the terminal 60 that is applied to the terminal holding part 52 can be suppressed. Further, since there is a step (such as a recess 542) on the upper surface of the terminal cover 54, it is possible to suppress the accumulation of liquid on the terminal cover 54. Further, the terminal cover 54 is connected to the flange portion 333 of the coil bobbin 33, but has a stepped portion between the terminal cover 54 and the flange portion 333. Specifically, the terminal cover 54 includes two covering portions 541, and a rib 543 is provided between the covering portion 541 and the covering portion 541. These portions protrude in the + Z direction from the flange portion 333. Therefore, it is possible to reduce the possibility that the liquid applied on the terminal holding part 52 enters the coil bobbin 33 side.

  The terminal holding portion 52 of this embodiment includes a positioning hole 539 that functions as a drain hole, and a through-hole 219 is formed in the reinforcing portion 218 provided at a position overlapping the positioning portion 539. The applied water can be discharged from the positioning hole 539 and the through portion 219. Therefore, the possibility that the liquid contacts the terminal 60 can be reduced.

DESCRIPTION OF SYMBOLS 1 ... Drain valve drive device, 2 ... Geared motor, 10 ... Wire, 11 ... Pulley, 12 ... Covering case, 13, 14 ... Fixing screw, 20 ... Outer case, 21 ... First case, 22 ... Second case, 30 DESCRIPTION OF SYMBOLS Motor part, 31 ... Motor case, 32 ... Cover plate, 33 ... Coil bobbin, 34 ... Stator coil, 35 ... Rotor, 36 ... Bobbin case, 40 ... Transmission wheel train, 41 ... Output pinion, 42 ... Planetary gear mechanism, 43 ... Reduction gear train, 44 ... Output gear, 50 ... Terminal part, 51 ... Terminal accommodating part, 52 ... Terminal holding part, 53 ... Terminal block, 53a ... First side, 53b ... Second side, 53c ... Third side, Upper end surface 53d, inclined surface 53e, 54 ... terminal cover, 60 terminal, 61 base end portion, 62 coil wire connecting portion, 63 connecting portion, 64 connector connecting portion, 211 bottom plate, 212 side plate , DESCRIPTION OF SYMBOLS 13 ... Circular recessed part, 214 ... Positioning pin, 215 ... 1st overhang | projection part, 215a ... 1st side plate, 215b ... 2nd side plate, 215c ... 3rd side plate, 216 ... Engagement protrusion, 217 ... Opening, 218 ... Reinforcement part, 218a, 218b ... reinforcing plate, 218c ... connecting part, 219 ... penetrating part, 221 ... upper plate, 222 ... side plate, 223 ... second overhanging part, 224 ... hook, 311, 312 ... notch, 313 ... pole tooth, 321 ... disc part, 322 ... through hole, 323 ... notch, 324 ... fixed part, 325 ... positioning hole, 326 ... pole tooth, 331 ... trunk part, 332 ... flange part, 333 ... flange part, 351 ... fixed shaft, 352: Magnet, 353: Induction rotating body, 353a ... Metal part, 353b ... Resin part, 354 ... Shaft part, 361 ... Cylindrical part, 362 ... Ring part, 531 ... Terminal mounting part, 532 ... Mouth, 533 ... connecting part, 534 ... connecting part, 535 ... rib, 536 ... through hole, 537 ... terminal insertion port, 538 ... terminal guide part, 539 ... positioning hole, 541 ... covering part, 542 ... recessed part, 543 ... rib 544: Groove portion, 549: Tying pin, G ... Gap, X ... First direction, Y ... Second direction, Z ... Third direction

Claims (15)

A terminal, a terminal holding part that holds the terminal, and an outer case that covers the terminal holding part,
A terminal part, wherein a gap for drainage communicating with an opening provided in the outer case is provided between the terminal holding part and the outer case. The terminal holding part includes a plurality of terminal attaching parts to which the terminals are attached,
The terminal part according to claim 1, wherein a concave part or a convex part is provided between the adjacent terminal attaching parts.   The terminal portion according to claim 1, wherein the outer case includes a reinforcing portion that reinforces the opening.   The terminal portion according to claim 3, wherein the reinforcing portion supports the terminal holding portion. The terminal holding part includes a drain hole,
The terminal portion according to claim 4, wherein the reinforcing portion includes a through portion that overlaps with the drain hole when the drain hole is viewed in a direction penetrating the terminal holding portion. The reinforcing portion includes two reinforcing plates that span the opening, and a connecting portion that connects the two reinforcing plates,
The terminal portion according to claim 5, wherein the penetrating portion is a gap between the two reinforcing plates.   The terminal part according to any one of claims 1 to 4, wherein the terminal holding part includes a drain hole.   The said terminal holding | maintenance part is provided with the terminal insertion part into which the said terminal is inserted, and the terminal guide part which guides the said terminal toward the said terminal insertion opening, The Claim 1 characterized by the above-mentioned. The terminal part of description.   The terminal part according to any one of claims 1 to 8, wherein the terminal holding part is formed integrally with a coil bobbin around which a coil is wound.   The terminal part according to claim 9, wherein the terminal holding part is fixed to the outer case via the coil bobbin.   The terminal part according to claim 9 or 10, wherein the terminal holding part includes a terminal cover that covers the terminal.   The terminal part according to claim 11, wherein the terminal cover has a step on an upper surface thereof.   The terminal portion according to claim 11 or 12, wherein the terminal cover is connected to a flange portion of the coil bobbin, and a step is provided between the terminal cover and the flange portion.   14. A motor comprising: the terminal portion according to claim 1; and a coil that is housed in the outer case and that is fed with power through the terminal. A drain valve driving device comprising the motor according to claim 14 and a drain valve driving member driven by the motor.

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