JP2011239579A - Motor type drive device and valve actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance waterproofness and prevent a corrosion or short-cut trouble of internal parts even when a water droplet falls from above.SOLUTION: A valve actuator 1 comprises a lower housing (housing body) 2B and an upper housing (cover) 2A, has a motor 3 and a gear train 4 attached thereon, and transfers the rotation of the motor 3 to the gear train 4 to rotate a sixth gear 28. The valve actuator 1 further comprises a first print board 5 to which a connection terminal 3a prolonging from the motor 3 is connected; a first internal connection terminal 22, one end of which is connected to the first print board 5; an external connection terminal 36 to which the other end of the first internal connection terminal 22 is connected; and a connector connection part 35 into which the external connection terminal 36 is inserted and that is integrally formed with the lower housing 2B. A connection part of the first internal connection terminal 22 and the external connection terminal 36 are arranged within the upper housing 2A, and the connector connection part 35 opens downward.

Description

  The present invention relates to a motor-type drive device and a valve actuator, and more particularly to a motor-type drive device suitable for an actuator used for opening / closing control of an electric valve or the like that controls the flow and flow rate of a fluid.

  2. Description of the Related Art Conventionally, an electric valve that opens and closes a valve using a motor has been widely used for flow control of refrigerant in air-conditioning equipment and flow control of combustion gas, air, hot water, liquid fuel, etc. in baths and showers. Various types of motor-type driving devices used for actuators for electric valves have been proposed. As an example, a motor-type driving device 50 shown in FIG. 9 is known. In the motor-type drive device 50, a gear train 53 accommodated in the lower housing 51B is disposed below the motor 52 accommodated in the upper housing 51A, and the rotation of the motor 52 is transmitted to the gear train 53 to transmit the gear train. It is comprised so that 53 may be rotated and the valve body which is not shown in figure may be rotated.

  The motor-type driving device 50 includes a first printed board 54 attached to the motor 52 and a second printed board 55 attached to the upper housing 51A as connection boards for electrical connection, and the lead wires 56 are provided. The substrates 54 and 55 are connected to each other. A plurality of connection terminals 52a protruding from the motor 52 are connected to the first printed circuit board 54, and the second printed circuit board 55 detects the magnetism of the magnet 53b embedded in the gear 53a and rotates the gear 53a. A sensor 57 that detects the amount and rotation angle is connected to a plurality of external connection terminals 59 that are inserted in the connector connection portion 58. The connector connecting portion 58 is connected to an external connector (not shown) from an external power source or control device.

  As another example of a conventional motor-type drive device, for example, Patent Document 1 proposes a device using a flexible flexible deformable substrate as a connection substrate for electrical connection. In the motor-type driving device 60, as shown in FIG. 10, a flexible board 61 bent in a substantially L shape is attached to the upper housing 51A, and a connection terminal 52a of the motor 52 is connected to one end of the flexible board 61. Is done. Further, the sensor 57 and the external connection terminal 59 are connected to the other end portion of the flexible substrate 61, and a fixing reinforcing plate 62 is attached.

Japanese Patent No. 3394407

  When an electric valve having a valve device (not shown) attached to the lower or lower side of the motor-type driving devices 50, 60 is used as, for example, the above-described flow control valve for hot water, condensation may occur during the use process. There is. At this time, if dew condensation occurs on the pipes and members installed above the motor-operated valve and water drops, the motor-type drive devices 50 and 60 are wetted by dropping onto the upper surfaces of the motor-type drive devices 50 and 60.

  However, in the conventional motor-type driving devices 50 and 60, the connector connecting portion 58 opens upward, so that water easily enters the motor-type driving devices 50 and 60 from the connector connecting portion 58. There was a risk of causing corrosion such as 56 or a short circuit accident.

  In the motor-type driving devices 50 and 60, the motor support plate 71 to which the motor 52 is attached, the base 72 on which the support shafts of the gears constituting the gear train 53 are fixed or formed, and the sensor 57 are assembled. After the mounted substrates 55 and 61 are attached to the upper housing 51A, each gear is attached to the support shaft of the base 72, and then the lower housing 51B is attached to the upper housing 51A.

  That is, while the gear train 53 is accommodated in the lower housing 51B, the sensor 57 is attached to the upper housing 51A via the substrates 55 and 61, so that the alignment between the sensor 57 and the magnet 53b of the gear 53a is not easy. The positional relationship between the two tends to vary. For this reason, there has been a problem that the detection accuracy of the rotation state is not stable and the reliability is lowered.

  Therefore, the present invention has been made in view of the problems in the above-described conventional technology, and is excellent in waterproofness, and even when a water droplet falls from above, corrosion of internal components and a short-circuit accident can be prevented. It is an object of the present invention to provide a motor type driving device that can facilitate the positioning of the motor and stabilize the detection accuracy of the rotation state.

  In order to achieve the above object, the present invention has a housing body and a cover, and a motor, a gear train and an output gear are attached to the housing body, and the rotation of the motor is transmitted to the gear train to rotate the output gear. A motor-type driving device for connecting a substrate to which a connection terminal protruding from the motor is connected, an internal connection terminal having one end connected to the substrate, and an external connection terminal to which the other end of the internal connection terminal is connected And the connector connecting portion formed integrally with the housing body, wherein the connecting portion between the internal connecting terminal and the external connecting terminal is located in the cover, and the connector connecting portion Is characterized by opening downward.

  According to the present invention, the connector connecting portion is formed integrally with the housing main body, on which the connecting portion between the internal connecting terminal and the external connecting terminal is located in the cover, and the connector connecting portion opens downward. Therefore, even if a water droplet falls on the upper surface of the motor type driving device, the motor type driving device is not submerged, and corrosion of internal parts and a short circuit accident can be prevented.

  In the motor-type driving device, a second sensor is disposed in a state parallel to the upper surface of the output gear, and a sensor for detecting the rotational state of the output gear is mounted on a surface facing the upper surface of the output gear. A substrate can be provided and the second substrate can be attached to the housing body.

  According to this, both the sensor and the output gear can be attached to the housing main body, and the alignment of the sensor becomes easy. As a result, it is possible to prevent the product-to-product variation in the positional relationship between the sensor and the detected object, and to stabilize the detection accuracy of the rotation state.

  In the motor-type drive device, a second internal connection terminal that is bent and has one end connected to the second substrate and the other end connected to the external connection terminal is provided. A first extending portion connected to the second substrate in a state orthogonal to the second substrate and extending vertically upward, and a first extension portion orthogonal to the first extending portion and connected to the external connection terminal 2 extending portions can be provided.

  According to this, the lower space of the second internal connection terminal can be widened, and the connector connection portion can be arranged upward accordingly. For this reason, the vertical width of the lower space of the connector connecting portion can be increased, and the external connector can be easily inserted even when the connector connecting portion is open downward.

  In the motor-type driving device, the second extending portion of the second internal connection terminal can be formed to be positioned at substantially the same height as the internal connection terminal. According to this, the places where soldering is required can be arranged in a horizontal line, and the soldering operation can be facilitated.

  In the motor-type driving device, the second internal connection terminal connects the length of the first extension portion of the second internal connection terminal or the length from the upper surface of the second substrate to the second extension portion. When the second substrate in a state of being placed is installed in the housing body, the second extending portion of the second internal connection terminal can be set to a length positioned at the upper end portion of the external connection terminal. According to this, the second internal connection terminal can be brought into contact with the upper end portion of the external connection terminal simultaneously with the installation of the second substrate on the housing body, and the assembly work can be facilitated. .

  In the motor-type driving device, the housing main body is formed integrally with the housing main body, and includes a substrate holding table on which the second substrate is placed, and for positioning the second substrate on the substrate holding table. A positioning part can be provided. According to this, it becomes possible to attach the second substrate to the housing body in a properly positioned state.

  In the motor type driving device, a convex portion can be provided on the upper surface of the substrate holding table, and an attachment hole through which the convex portion of the substrate holding table is inserted can be formed in the second substrate.

  In the motor-type driving device, the motor is mounted on the upper surface, and a motor support plate installed on the housing body is provided. The height of the internal connection terminal is set to the motor support plate in a state where the motor is mounted. When installed in the housing body, the internal connection terminal can be set at a height located at the upper end of the external connection terminal. According to this, at the same time when the motor and the motor support plate are installed in the housing body, the internal connection terminal can be brought into contact with the upper end portion of the external connection terminal, and the assembly work can be facilitated. .

  In the motor-type drive device, the housing main body is formed integrally with the housing main body, and includes a holding base on which the motor support plate is placed, and a positioning unit for positioning the motor support plate on the holding base Can be provided. According to this, it becomes possible to attach the motor and the motor support plate to the housing body in a properly positioned state.

  In the motor-type drive device, a convex portion can be provided on the upper surface of the holding base, and an attachment hole through which the convex portion of the holding base is inserted can be formed in the motor support plate.

  In the motor-type driving device, a waterproof wall can be provided over the entire circumference on the mating surface of the cover and the housing body. According to this, it is possible to prevent water from entering from the mating surface of the cover and the housing body, and it is possible to further improve the waterproofness.

  In addition, the present invention is a valve actuator, which is configured by any of the motor-type driving devices described above, and controls opening and closing of the valve by rotation of the output gear. And according to this invention, like the said invention, it can avoid the water immersion to the inside of a motor type drive device, can prevent the corrosion and short circuit accident of an internal component, and can improve reliability. A valve actuator can be provided.

  As described above, according to the present invention, it is possible to improve waterproofness and prevent corrosion of internal parts and short circuit accidents even when water droplets fall from above.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows one Embodiment of the motor type drive device concerning this invention, (a) is a top view of the motor type drive device in the state which removed the upper housing, (b) is a motor type drive device (whole) It is sectional drawing of the state cut | disconnected by the AA line of (a). FIG. 2 is a top view of the upper housing of FIG. 1. It is an overhead view of the lower housing of FIG. (A) is a bottom view of the motor support plate of FIG. 1, and (b) is a bottom view of the base of FIG. It is an enlarged view which shows the front-end | tip part of the external connection terminal of FIG. 1, (a) is a top view, (b) is a partially broken front view. It is a figure which shows the lower housing of FIG. 1, (a) is a top view, (b) is a front view, (c) is a side view, (d) is a BB sectional drawing of (a). It is sectional drawing of a lower housing and its mounting components in the state which removed the motor and the motor support plate. It is a top view of the 2nd printed circuit board of FIG. It is sectional drawing which shows an example of the conventional motor type drive device. It is sectional drawing which shows the other example of the conventional motor type drive device.

  Next, an embodiment for carrying out the present invention will be described in detail with reference to the drawings. In the following description, a case where the motor type driving device according to the present invention is applied to a valve actuator for controlling opening and closing of the valve device will be exemplified.

  FIG. 1 shows an embodiment of a valve actuator to which a motor type driving device according to the present invention is applied. This valve actuator 1 is roughly divided into a housing 2 (2A, 2B), a stepping motor (hereinafter referred to as a stepping motor). 3) and a gear train 4 or the like.

  The housing 2 includes an upper housing (cover) 2A and a lower housing (housing main body) 2B formed in two.

  As shown in FIG. 2, a housing portion 10 for housing the motor 3 (see FIG. 1) is provided inside the upper housing 2A, and the lower end of the upper housing 2A has a concave shape over the entire circumference. A waterproof wall 11 is provided. Further, a plurality of snap fit portions 12 having locking holes 12a and an attachment portion 13 for attaching a valve device (not shown) are provided on the side surface on the longitudinal side of the upper housing 2A.

  As shown in FIG. 3, a housing portion 14 for housing the gear train 4 and the like is provided inside the lower housing 2B, and the upper housing is provided at the upper end of the lower housing 2B over the entire circumference. A convex waterproof wall 15 that engages with the 2A concave waterproof wall 11 (see FIG. 2) is formed. Further, a plurality of locking claws 16 for locking the snap fit portion 12 of the upper housing 2A and a mounting portion 17 for mounting a valve device (not shown) are provided on the longitudinal side surface of the lower housing 2B. Provided.

  As shown in FIG. 1B, a motor support plate 20 is attached to the upper portion of the lower housing 2B together with a base 21, and a plurality of connection terminals 3a projecting in the horizontal direction on the upper surface of the motor support plate 20 and A motor 3 having an output shaft 3b protruding downward is attached.

  The connection terminal 3a of the motor 3 is connected to the lower part of the first printed circuit board 5 arranged orthogonal to the connection terminal 3a, and a plurality of first internal connection terminals extending in the horizontal direction are formed on the upper part of the first printed circuit board 5. One end of 22 is connected. The other end of the first internal connection terminal 22 is connected to the upper end of an external connection terminal 36 to be described later. In addition, the 1st printed circuit board 5 is comprised by the flat rigid board | substrate.

  Here, the height of the first internal connection terminal 22 is such that when the motor support plate 20 with the motor 3 attached is placed on the upper portion of the lower housing 2B, the first internal connection terminal 22 is the external connection terminal. The height is set so as to be positioned at the upper end of 36.

  The motor support plate 20 on which the motor 3 is mounted and the base 21 to which the motor support plate 20 is attached have the same planar shape as shown in FIGS. 4 (a) and 4 (b). The support plate 20 and the base 21 have through holes 20a and 21a through which the output shaft 3b of the motor 3 is inserted, and mounting holes 20b to 20d and 21b to 21d for fixing the motor support plate 20 and the base 21 to the lower housing 2B. And are formed.

  As shown in FIG. 4B, a fixed bearing 21e protruding downward (see FIG. 1B) is formed on the lower surface 21f of the base 21, and a rod-shaped fixed shaft 29 extending downward, 30 (see FIG. 1B) is fixed. Furthermore, a protrusion 21m for temporarily positioning the second printed circuit board 6 is implanted on the lower surface 21f, as will be described later.

  Returning to FIG. 1, the gear train 4 is accommodated in the lower housing 2 </ b> B using a gap between the bottom surface of the lower housing 2 </ b> B and the lower surface 21 f of the base 21. The first gear 23 is mounted on the output shaft 3b, and the second gear 24 to the sixth gear 28 are included.

  A second gear 24 meshing with the first gear 23 and a third gear (pinion) 25 are integrally formed, and a fixed shaft 29 whose upper end is fixed to the base 21 (see FIG. 4B). It is pivotally supported by the shaft. The fourth gear 26 and the fifth gear (pinion) 27 that mesh with the third gear 25 are integrally formed, and the fixed shaft 30 (FIG. 4B) whose upper end is fixed to the base 21 is formed. (See Fig. 1). Furthermore, a sixth gear 28 (output gear) that meshes with the fifth gear 27 is rotatably supported by a fixed bearing 21e formed on the base 21. The sixth gear 28 includes a magnet 8 (detected body). ) Is buried. A valve body of a valve device (not shown) is inserted and connected into the sixth gear 28, and the rotation angle (position) of the valve body is detected by a sensor 7 described later.

  The lower ends of the fixed shafts 29 and 30 are inserted into the recesses 31 and 32 (see FIG. 6A) formed at the bottom of the lower housing 2B, and the lower portion of the sixth gear 28 is It inserts in the cylindrical part 33 (refer Fig.6 (a)) formed in the bottom part of the side housing 2B.

  Further, as shown in FIG. 1B, a connector connecting portion 35 for connecting an external power source or an external connector (not shown) from the control device to the upper part of the short side surface of the lower housing 2B. Is formed integrally with the lower housing 2B. The connector connecting portion 35 is formed so as to open downward, and the majority (more than half of the connecting portion 35) is located above the upper end of the lower housing 2B.

  A plurality of external connection terminals 36 extending upward are inserted into the lid portion (end portion opposite to the opening) of the connector connection portion 35. These external connection terminals 36 are arranged so that their upper ends are located in the upper housing 2A, and as shown in FIG. 5, linear terminal grooves 36a that divide the end portions into two are formed at the upper ends. Is done.

  As shown in FIG. 6, a plurality of holding bases 38 to 43 for holding the motor support plate 20 and the base 21 are formed integrally with the lower housing 2B on the inner side surface of the lower housing 2B. Among these, convex portions 38a to 40a for fixing the motor support plate 20 and the base 21 to the lower housing 2B are formed on the upper surfaces of the holding bases 38 to 40.

  The motor support plate 20 and the base 21 are fixed to the lower housing 2B after the projections 38a to 40a of the holding bases 38 to 40a are inserted into the mounting holes 20b to 20d and 21b to 21d of the motor support plate 20 and the base 21. This is done by crushing the tip of the convex portions 38a to 40a.

  Further, as shown in FIGS. 6A and 6D, a pair of substrate holding tables 45 and 46 for holding the second printed circuit board 6 are provided between the holding tables 38 and 39 and the lower housing 2B. It is integrally formed. These substrate holding bases 45 and 46 are formed so as to be lower than the holding bases 38 and 39, and convex portions 45a and 46a for fixing the second printed circuit board 6 to the lower housing 2B are formed on the respective upper surfaces. It is formed.

  The second printed circuit board 6 and the lower housing 2B are fixed after the convex portions 45a and 46a of the substrate holding bases 45 and 46 are inserted into a pair of mounting holes (not shown) drilled in the second printed circuit board 6, and then protruded. This is done by crushing the tip portions of the portions 45a and 46a.

  As shown in FIG. 7, the second printed circuit board 6 is disposed in parallel with the upper surface of the sixth gear 28, and the sensor 7 is attached to the lower surface thereof. As shown in FIG. 8, the second printed circuit board 6 is provided with a mounting hole 6 a through which the convex portions 45 a and 46 a (see FIG. 6) of the circuit board holding bases 45 and 46 are inserted, and when the second printed circuit board 6 is temporarily positioned. A small hole 6b into which the protrusion 21m (see FIG. 4B) on the lower surface 21f of the base 21 is inserted is drilled. In FIG. 8, illustration of pattern wirings formed on the front and back surfaces of the second printed circuit board 6, connection holes for inserting and connecting lead wires, and the like is omitted.

  Further, as shown in FIG. 7, the second printed circuit board 6 is bent at a substantially right angle and is connected to a second internal connection terminal 47 for connecting the second printed circuit board 6 to the external connection terminal 36. . The long shaft portion 47 a of the second internal connection terminal 47 is orthogonal to the second printed circuit board 6, while the short shaft portion 47 b is orthogonal to the external connection terminal 36.

  The length L of the long shaft portion 47a (the length from the upper surface of the second printed circuit board 6 to the short shaft portion 47b) is the same as that of the lower housing 2B of the second printed circuit board 6 with the second internal connection terminal 47 connected thereto. Is set to such a length that the short shaft portion 47 b of the second internal connection terminal 47 is positioned at the upper end portion of the external connection terminal 36. Further, in order to facilitate the soldering operation, the short shaft portion 47b is positioned at substantially the same height as the first internal connection terminal 22 (see FIG. 1B) connected to the first printed circuit board 5. To be formed. Note that the second printed circuit board 6 is configured by a flat rigid board.

  The sensor 7 is provided for detecting the rotation amount and rotation angle of the sixth gear 28, and is configured by a magnetic detection element such as a Hall IC. The sensor 7 is disposed to face the magnetic pole forming surface of the magnet 8 of the sixth gear 28 and detects the magnetism of the magnet 8 (change in the magnetic field below the sensor 7).

  Next, a method for assembling the valve actuator 1 having the above configuration will be described with reference to FIGS.

  The motor 3 is attached to the motor support plate 20 in advance, and the first gear 23 is attached to the output shaft 3b. Further, the first internal connection terminal 22 is attached to the first printed circuit board 5, and then the first printed circuit board 5 is connected to the connection terminal 3 a of the motor 3. Further, the sensor 7 is attached to the second printed board 6 and the second internal connection terminal 47 is connected.

  When assembling, first, the base 21 (see FIG. 4B) to which the upper ends of the fixed shafts 29 and 30 are fixed is turned over so that the lower surface 21f of the base 21 faces upward. In this state, the second printed circuit board 6 to which the sensor 7 and the second internal terminal 47 are attached is placed at a predetermined position on the lower surface 21 f of the base 21. This placement (temporary positioning) is performed so that the two protrusions 21m planted on the lower surface 21f of the base 21 are inserted into the two small holes 6b (see FIG. 8) provided in the second printed circuit board 6.

  Next, the second to sixth gears 24 to 28 are placed in order, and then the lower housing 2 </ b> B is covered so as to cover the second to sixth gears 24 to 28. At this time, the tips of the convex portions 45a and 46a of the substrate holding bases 45 and 46 are inserted into two mounting holes 6a (see FIG. 8) provided in the second printed circuit board 6. Further, when covering the lower housing 2B, the lower ends of the fixed shafts 29 and 30 are inserted into the recesses 31 and 32 (see FIG. 6A) formed in the bottom of the lower housing 2B, and the sixth gear 28 The lower part is inserted into a cylindrical part 33 (see FIG. 6A) formed at the bottom of the lower housing 2B. Furthermore, convex portions 38a to 40a (see FIG. 6A) formed on the holding bases 38 to 40 of the lower housing 2B are formed in mounting holes 21b to 21d (see FIG. 4B) formed in the base 21. Insert the base 21 and position the lower housing 2B.

  The structure 21 assembled as described above is inverted again so that the base 21 is positioned on the upper side. By this reversal, the second printed circuit board 6 falls onto the substrate holding bases 45 and 46 while the convex portions 45a and 46a are inserted into the mounting holes 6a, thereby positioning the second printed circuit board 6. Is done.

  At the same time, the end of the short shaft portion 47b (see FIG. 7) of the second internal connection terminal 47 is inserted into the terminal groove 36a (see FIG. 5) of the external connection terminal 36. Thereafter, the second printed circuit board 6 is caulked by crushing the tips of the convex portions 45a and 46a, and the second printed circuit board 6 is fixed to the lower housing 2B.

  Next, the motor support plate 20 with the motor 3 attached is placed on the base 21 and the convex portions 38a to 40a (see FIG. 6A) of the holding bases 38 to 40 of the lower housing 2B. The mounting holes 20b to 20d (see FIG. 4A) of the motor support plate 20 are inserted.

  At the same time, the end of the first internal connection terminal 22 (see FIG. 1B) extending from the first printed circuit board 5 is inserted into the terminal groove 36a (see FIG. 5) of the external connection terminal 36. Thereafter, the motor support plate 20 and the base 21 are caulked by crushing the convex portions 38a to 40a, and the motor support plate 20 and the base 21 are fixed to the lower housing 2B.

  Next, the first internal connection terminal 22 and the external connection terminal 36 of the first printed circuit board 5 are soldered, and the second internal connection terminal 47 and the external connection terminal 36 of the second printed circuit board 6 are soldered. . At this time, since the heights of the first and second internal connection terminals 22 and 47 are the same and the soldering portions are arranged in a horizontal line, the soldering is easy to perform, and the operation can be performed promptly. The soldering may be performed manually or mechanically.

  Finally, the upper housing 2A is covered, and the snap fit portion 12 (see FIG. 2) of the upper housing 2A is locked to the locking claws 16 of the lower housing 2B to join the upper housing 2A and the lower housing 2B.

  As described above, according to the present embodiment, the connector connecting portion 35 is formed integrally with the lower housing 2B, and then, the first and second internal connecting terminals 22, 47 and the external connecting terminal 36 are connected. Since the connecting portion is located in the upper housing 2A and the connector connecting portion 35 opens downward, even if a water droplet falls on the upper surface of the valve actuator 1, it can be immersed in the valve actuator 1. Therefore, it is possible to prevent corrosion of the motor 3 and the connection terminal 3a and a short circuit accident.

  Further, as shown in FIG. 7, the second internal connection terminal 47 connected to the second printed circuit board 6 is bent and formed so that the long shaft portion 47a and the short shaft portion 47b intersect at a substantially right angle. The lower space 48 of the connection terminal 47 can be widened. Accordingly, the connector connecting portion 35 can be disposed upward, and the vertical width W of the lower space 49 of the connector connecting portion 35 can be increased. For this reason, it is possible to easily insert the external connector even when the connector connecting portion 35 is opened downward.

  Furthermore, since the second printed circuit board 6 with the sensor 7 mounted is attached to the lower housing 2B, both the sensor 7 and the sixth gear 28 can be attached to the lower housing 2B side. Positioning with the upper magnet 8 becomes easy. As a result, it is possible to prevent variation between products in the positional relationship between the two and to stabilize the detection accuracy of the rotation state.

  In the above embodiment, the case where the motor type driving device according to the present invention is applied to the valve actuator is exemplified, but the present invention can be widely applied to other actuators.

  Further, the mounting holes 20b to 20d and 21b to 21d are provided in the motor support plate 20 and the base 21, and the convex portions 38a to 40a are provided on the upper surfaces of the holding bases 38 to 40 of the lower housing 2B. You may make it provide a mounting hole in the base 21 and the holding stands 38-40 while providing a protrusion in a lower surface. The same applies to the second printed circuit board 6 and the substrate holding bases 45 and 46, and a convex portion is provided on the second printed circuit board 6 side and an attachment hole is provided on the substrate holding base 45 and 46 side. Good.

  Furthermore, although the motor support plate 20 and the base 21 are configured as separate bodies and are arranged so as to overlap each other, they may be formed integrally.

  Moreover, although the magnetic sensor was illustrated as the sensor 7, if the rotation state of the gear train 4 can be detected, another sensor can also be used.

1 Valve actuator 2 Housing 2A Upper housing (cover)
2B Lower housing (housing body)
3 motor 3a connection terminal 3b output shaft 4 gear train 5 first printed circuit board 6 second printed circuit board 6a mounting hole 6b small hole 7 sensor 8 magnet 10 housing part 11 concave waterproof wall 12 snap fit part 12a locking hole 13 mounting part 14 Housing 15 Convex waterproof wall 16 Locking claw 17 Mounting portion 20 Motor support plate 20a Through hole 20b-20d Mounting hole 21 Base 21a Through hole 21b-21d Mounting hole 21e Fixed bearing 21f Lower surface 21m Projection 22 First internal connection terminal 23 First gear 24 Second gear 25 Third gear 26 Fourth gear 27 Fifth gear 28 Sixth gear 29, 30 Fixed shaft 31, 32 Recess 33 Tubular portion 35 Connector connection portion 36 External connection terminal 36a Terminal grooves 38-43 Holding bases 38a to 40a Convex portions 45 and 46 Substrate holding bases 45a and 46a Convex portion 47 Second internal connection terminal 48 Second internal connection terminal Lower space of the side space 49 connector connecting portion

Claims (12)

A motor-type driving device having a housing main body and a cover, attaching a motor, a gear train and an output gear to the housing main body, and transmitting the rotation of the motor to the gear train to rotate the output gear;
A substrate to which a connection terminal protruding from the motor is connected;
An internal connection terminal having one end connected to the substrate;
An external connection terminal to which the other end of the internal connection terminal is connected;
The external connection terminal is inserted and provided with a connector connection part formed integrally with the housing body,
A motor-type drive device, wherein a connection portion between the internal connection terminal and the external connection terminal is located in the cover, and the connector connection portion opens downward. A second substrate that is arranged in a state parallel to the upper surface of the output gear and on which a sensor for detecting the rotational state of the output gear is mounted on a surface facing the upper surface of the output gear;
The motor-type drive device according to claim 1, wherein the second substrate is attached to the housing body. A second internal connection terminal that is bent and has one end connected to the second substrate and the other end connected to the external connection terminal;
The second internal connection terminal is connected to the second substrate in a state orthogonal to the second substrate, and extends vertically upward, orthogonal to the first extension portion, and The motor-type drive device according to claim 2, further comprising a second extending portion connected to the external connection terminal.   4. The motor-type drive device according to claim 3, wherein the second extending portion of the second internal connection terminal is formed to be positioned at substantially the same height as the internal connection terminal.   The length of the first extension part of the second internal connection terminal or the length from the upper surface of the second substrate to the second extension part is the second in a state where the second internal connection terminal is connected. 5. The length of the second extended portion of the second internal connection terminal is set to a length positioned at the upper end of the external connection terminal when the substrate is installed on the housing body. The motor-type drive device described in 1.   The housing main body is formed integrally with the housing main body, includes a substrate holding table on which the second substrate is placed, and a positioning portion for positioning the second substrate is provided on the substrate holding table. The motor-type drive device according to any one of claims 2 to 5, wherein   The motor according to claim 6, wherein a convex portion is provided on an upper surface of the substrate holding table, and an attachment hole through which the convex portion of the substrate holding table is inserted is formed in the second substrate. Type driving device. The motor is mounted on the upper surface, and includes a motor support plate installed on the housing body,
The height of the internal connection terminal is set to a height at which the internal connection terminal is positioned at the upper end of the external connection terminal when the motor support plate with the motor attached is installed in the housing body. The motor type driving device according to claim 1, wherein the motor type driving device is provided.   The housing body is formed integrally with the housing body, includes a holding base on which the motor support plate is placed, and a positioning portion for positioning the motor support plate is provided on the holding base. The motor-type drive device according to claim 8.   The motor-driven drive according to claim 9, wherein a convex portion is provided on an upper surface of the holding base, and an attachment hole through which the convex portion of the holding base is inserted is formed in the motor support plate. apparatus.   The motor-type drive device according to any one of claims 1 to 10, wherein a waterproof wall is provided on the mating surface of the cover and the housing main body over the entire circumference.   12. A valve actuator comprising the motor-type drive device according to claim 1, wherein opening and closing of the valve is controlled by rotation of the output gear.

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