JP2010110154A - Molded motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molded motor having high quality in that the motor is durable against stress concentration due to shrinkage in molding and a tensile stress in mold release and peeling is prevented in an interface between a resin and a substrate. <P>SOLUTION: A round hole 8 is opened between each of lands 7 used to solder a connector pin 17 and is filled with a thermosetting resin 12, a glass fiber in the thermosetting resin 12 which the round hole 8 is filled with, is almost oriented in the plate thickness direction of a printed board 14, and thus, the molded motor is durable against stress concentration due to shrinkage in molding and a tensile stress in mold release and peeling is prevented from being generated in the interface between the thermosetting resin 12 and the printed board 14. In this way, the molded motor 1 is provided which ensures the high quality wherein tracking never occurs even when the motor is used in a space of high temperature and high humidity. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a molded motor that is mainly mounted on an electric device and has a built-in substrate and is molded integrally with a resin.

  2. Description of the Related Art In recent years, motors mounted on electrical equipment such as a ventilator have been demanded for motors that are reduced in size, thickness, and weight while ensuring high quality.

  Conventionally, this type of mold motor has a configuration disclosed in Patent Document 1.

  The motor will be described below with reference to FIG.

As shown in the figure, a vertically long slit 114 is provided between a plurality of through holes 112 for connector pins on a printed circuit board 111, and a mold resin is poured between the slits 114 during molding to insulate the through holes. While ensuring, it is set as the structure of the mold motor which ensured those creepage distances.
JP 2007-287900 A

  According to such a conventional motor, since the resin poured into the vertically long slit flows in the longitudinal direction of the slit, the glass fiber contained in the direction is oriented, so that the molding shrinkage rate of the resin is large. If there is a lot of release agent consisting of metal soap contained in the resin, such as stress concentration due to molding shrinkage during resin molding and solidification, stress concentration due to the difference between the linear expansion coefficient of the substrate and the resin, Due to the tensile force of the resin and the substrate due to the pulling of the resin that works during mold release from the mold, there are few glass fibers lined up in the thickness direction of the substrate. When used in a high-temperature and high-humidity space, there is a problem that tracking may occur between through-holes. Resistant to stress concentration due to molding shrinkage and tensile force at the time of demolding, resin Molded motor interfacial separation of the substrate to ensure a high quality does not occur is required.

  In order to achieve the above object, the molded motor of the present invention is a stator in which an armature winding and a printed board are integrally molded with a resin containing a fibrous reinforcing material and a filler to form an outer cover. A rotor that is rotatably arranged opposite to the stator, and a molded motor in which a plurality of connector terminal pins are led to the outside, and for soldering the connector terminal pins to the printed circuit board A plurality of lands are provided, a round hole is opened between each land, the round hole is filled with the resin, and the fibrous reinforcing material is oriented in the thickness direction of the printed circuit board. It is set as the structure of the mold motor characterized by these.

  By this means, most of the glass fibers in the resin filled in the round holes are oriented in the thickness direction of the substrate, so it can withstand stress concentration due to molding shrinkage and tensile force at the time of demolding, Since the interfacial peeling of the substrate does not occur, it is possible to obtain a molded motor that can realize high quality ensuring that does not cause tracking even when the motor is used in a high-temperature and high-humidity space.

  Further, in order to achieve the above object, the molded motor of the present invention has a configuration of a molded motor characterized in that a plurality of round holes opened between lands are provided.

  By this means, the glass fiber is oriented in the thickness direction of the substrate, and there can be a plurality of places connecting the front and back of the substrate, so the resistance to the interfacial peeling force between the resin and the substrate is increased, so a molded motor that can realize further high quality assurance can get.

  In order to achieve the above object, the molded motor of the present invention has a molded motor configuration in which a plurality of round holes are arranged substantially parallel to the longitudinal direction of the land.

  By this means, the glass fibers are oriented in the thickness direction of the substrate, and there can be multiple places in the longitudinal direction of the land that connect the front and back of the substrate. A molded motor that can be secured is obtained.

  In order to achieve the above object, the molded motor of the present invention has a molded motor structure characterized in that the reinforcing material is a fiber having two or more types of lengths.

  By this means, even if the position of the round hole is located at the flow end, since the flowability of the short glass fiber is high, the amount of the glass fiber oriented in the plate thickness direction is surely increased. Since the proof strength against the interfacial peeling force is further increased, a molded motor capable of further ensuring high quality can be obtained.

  In order to achieve the above object, the molded motor of the present invention has a configuration of a molded motor characterized by containing a needle-like crystal such as wollastonite.

  By this means, even if the position of the round hole is located at the flow end, the flowability of the acicular wollastonite is high, so that the amount of the acicular body oriented in the plate thickness direction is surely increased. Further, since the proof strength against the interfacial peeling force between the resin and the substrate is further increased, a molded motor capable of further ensuring high quality can be obtained.

  In order to achieve the above object, the molded motor of the present invention has a structure in which the stator is integrally molded by a screw-type injection molding machine, and the reinforcing material is a back pressure at the time of measurement of the injection molding machine. It is set as the structure of the mold motor characterized by making it break by.

  By this means, even if the position of the round hole is located at the flow end, since the flowability of the broken short glass fiber is high, the amount of the glass fiber oriented in the plate thickness direction is surely increased. As a result, the resistance against the interfacial peeling force between the substrate and the substrate is further increased, so that a molded motor capable of ensuring higher quality can be obtained.

  In order to achieve the above object, the mold motor of the present invention is characterized in that the filler is made of aluminum hydroxide and calcium carbonate, and the weight percentage of aluminum hydroxide is higher than the weight percentage of calcium carbonate. This is a motor configuration.

  By this means, since the amount of aluminum hydroxide having a large amount of resin absorption is larger than the amount of calcium carbonate having a small amount of resin absorption, the fluidity of the resin is lowered, so the flow of the resin is fast, and the shape changing portion Since the air entrainment that occurs when the flow direction changes is suppressed, the generation of voids in the round hole is suppressed, and the resistance to the interfacial peeling force between the resin and the substrate further increases, ensuring even higher quality. A molded motor that can realize the above is obtained.

  In order to achieve the above object, the molded motor of the present invention has a molded motor structure characterized in that the filler is a filler having three or more kinds of particle size distributions.

  By this means, a filler with a coarse particle size has a fast fluidity, and a filler with a small particle size has a slow fluidity, so a part that needs to be filled quickly and a part that needs to be filled slowly, such as a round hole. Since the filling speed can be adjusted, the generation of voids in the vicinity of the round hole is suppressed because unfilling due to the slow filling speed and the generation of voids due to the high filling speed are suppressed. Since the proof strength against the peeling force is further increased, a molded motor capable of further ensuring high quality can be obtained.

  In order to achieve the above object, the molded motor of the present invention has a molded motor structure characterized in that the filler having a fine particle size distribution of the filler is aluminum hydroxide. .

  By this means, the filling speed in the vicinity of the round hole is further reduced, so that air entrainment is suppressed and shrinkage at the time of molding and solidification is reduced. Therefore, a molded motor that can achieve higher quality can be obtained.

  Further, in order to achieve the above object, the molded motor of the present invention has a configuration of a molded motor characterized in that a gas escape portion is provided in the vicinity of the round hole portion of the jacket to release gas generated during molding. It is a thing.

  By this means, the gasification component contained in the resin can be pushed to the outside, so that the filling speed and pressure in the vicinity of the round hole are reduced, so that air entrainment is suppressed and shrinkage during molding solidification Therefore, the proof strength against the interfacial peeling force between the resin and the substrate is further increased, so that a molded motor capable of further ensuring high quality can be obtained.

  According to the present invention, the glass fibers in the resin filled in the round holes are mostly oriented in the plate thickness direction of the substrate because the holes are round holes. Since it can withstand the tensile force of the time and the interface peeling between the resin and the substrate does not occur, even when the motor is used in a high-temperature and high-humidity space, it is possible to provide a molded motor that realizes high quality without tracking.

  In addition, according to the present invention, since a plurality of round holes are opened between the lands, the glass fiber is oriented in the thickness direction of the substrate and a plurality of places connecting the front and back of the substrate can be formed. Since the proof strength against the peeling force is increased, it is possible to provide a molded motor that realizes higher quality.

  Further, according to the present invention, since the plurality of round holes are arranged substantially parallel to the longitudinal direction of the land, the glass fiber is oriented in the plate thickness direction of the substrate and the place where the front and back of the substrate are connected is in the longitudinal direction of the land. Since it is possible to provide more than one, the proof strength against the interfacial peeling force between the resin and the substrate is further increased, so that it is possible to provide a molded motor that can further ensure high quality.

  In addition, according to the present invention, since the fiber contained in the resin has two or more types of length, the flowability of the short glass fiber is high, so that the amount of the glass fiber oriented in the thickness direction of the substrate is small. Since it surely increases and the proof strength against the interfacial peeling force between the resin and the substrate further increases, it is possible to provide a molded motor that achieves higher quality.

  In addition, according to the present invention, since acicular wollastonite has high fluidity because it contains acicular crystals such as wollastonite, the acicular body is oriented in the thickness direction of the substrate. Therefore, since the mold shrinkage rate in the plate thickness direction of the resin substrate is lowered, the proof strength against the interfacial peeling force between the resin and the substrate is further increased, so that it is possible to provide a molded motor that further ensures high quality.

  Further, according to the present invention, the flowability of the broken short glass fiber is increased by breaking the glass fiber by the back pressure at the time of measurement of the injection molding machine, and the amount of the glass fiber oriented in the plate thickness direction of the substrate. Therefore, the resistance against the interfacial peeling force between the resin and the substrate is further increased, so that it is possible to provide a molded motor that can further ensure high quality.

  In addition, according to the present invention, since the amount of aluminum hydroxide having a large amount of resin absorption is larger than the amount of calcium carbonate having a small amount of resin absorption, the fluidity as a resin is lowered, so that the resin flow is reduced. Since the air entrainment that occurs when the flow direction changes, such as the shape change part, is suppressed quickly, the generation of voids in the round hole part is suppressed, and the yield strength against the interfacial peeling force between the resin and the substrate is further increased. Further, it is possible to provide a molded motor that achieves higher quality.

  Further, according to the present invention, since the particle size distribution of the filler is set to three or more types, the filler having a coarse particle size has a fast fluidity, and the filler having a small particle size has a slow fluidity, so that the filler is filled quickly. Because it is possible to adjust the filling speed for parts that need to be filled and parts that need to be filled slowly, such as round holes, unfilled due to slow filling speeds and void generation due to high filling speeds are suppressed. Since the generation of voids is suppressed in the vicinity of the round hole portion and the proof strength against the interfacial peeling force between the resin and the substrate is further increased, it is possible to provide a molded motor that can further ensure high quality.

  Further, according to the present invention, the inclusion of aluminum hydroxide having a fine particle size further reduces the filling speed in the vicinity of the round hole, thereby suppressing air entrainment and at the time of molding and solidification. Since the shrinkage of the resin is also reduced, the proof strength against the interfacial peeling force between the resin and the substrate is further increased, so that it is possible to provide a molded motor that further ensures high quality.

  In addition, according to the present invention, the gasification component contained in the resin can be pushed out by providing a gas escape portion that escapes gas generated during molding in the vicinity of the round hole portion of the jacket. Since the filling speed and pressure in the vicinity of the round hole are reduced, air entrainment is suppressed and shrinkage at the time of molding and solidification is reduced, so the resistance to the interfacial peeling force between the resin and the substrate is further increased. Further, it is possible to provide a molded motor that achieves higher quality.

  According to a first aspect of the present invention, there is provided a stator in which an armature winding and a printed board are integrally molded with a resin containing a fibrous reinforcing material and a filler to form an outer cover, A rotor that is rotatably arranged opposite to a stator, and a molded motor in which a plurality of connector terminal pins are led out, and a plurality of lands for soldering the connector terminal pins to the printed circuit board And a round hole is opened between the lands, the round hole is filled with the resin, and the fibrous reinforcing material is oriented in the thickness direction of the printed board. Since the glass fiber in the resin filled in the round hole is oriented in the thickness direction of the substrate, the stress concentration due to molding shrinkage and the tensile force at the time of demolding are used. Also withstand the resin It has the effect of suppressing the occurrence of interfacial peeling of the substrate.

  The invention according to claim 2 is a structure of a molded motor characterized in that a plurality of round holes opened between lands are formed, and the glass fibers are oriented in the thickness direction of the substrate, Since a plurality of places connecting the front and back of the substrate can be formed, it has an effect of increasing the proof strength against the interfacial peeling force between the resin and the substrate.

  The invention described in claim 3 is a molded motor structure characterized in that the plurality of round holes are arranged substantially parallel to the longitudinal direction of the land, and the glass fibers are oriented in the thickness direction of the substrate. Since a plurality of places connecting the front and back of the substrate can be formed in the longitudinal direction of the land, there is an effect that the proof strength against the interfacial peeling force between the resin and the substrate is further increased.

  In the invention according to claim 4, the reinforcing material is a molded motor having two or more types of fibers, and the short glass fiber has high fluidity. Since the amount of alignment in the plate thickness direction of the substrate is surely increased, there is an effect that the proof strength against the interfacial peeling force between the resin and the substrate is further increased.

  The invention according to claim 5 is a molded motor characterized in that the reinforcing material contains acicular crystals such as wollastonite, and the fluidity of acicular wollastonite. Since the needle-like body is oriented in the plate thickness direction of the substrate, the molding shrinkage rate of the resin substrate in the plate thickness direction is lowered, and the yield strength against the interface peeling force between the resin and the substrate is further increased.

  The invention according to claim 6 is a structure in which the stator is integrally molded by a screw type injection molding machine, and the reinforcing material is broken by back pressure at the time of measurement of the injection molding machine. Since the flowability of broken short glass fibers is high, the amount of glass fibers oriented in the thickness direction of the substrate surely increases. It has the effect of further increasing the resistance to force.

  The invention according to claim 7 is a molded motor comprising a filler comprising aluminum hydroxide and calcium carbonate, wherein the weight percentage of aluminum hydroxide is higher than the weight percentage of calcium carbonate. Yes, since the amount of aluminum hydroxide with a large amount of resin absorption is larger than the amount of calcium carbonate with a small amount of resin absorption, the fluidity of the resin decreases, so the resin flows quickly and flows in the shape change part, etc. Since air entrainment that occurs when the direction changes is suppressed, generation of voids in the round hole is suppressed, and the yield strength against the interface peeling force between the resin and the substrate is further increased.

  The invention according to claim 8 is a mold motor structure characterized in that the filler is a filler having three or more kinds of particle size distributions, and the filler having a coarse particle size has high fluidity. Because the fluidity of the filler with a small particle size is slow, the filling speed can be adjusted for the part that needs to be filled quickly and the part that needs to be filled slowly, such as a round hole. Since generation of voids due to unfilling and high filling speed is suppressed, generation of voids in the vicinity of the round hole is suppressed, and the yield strength against the interface peeling force between the resin and the substrate is further increased.

  The invention described in claim 9 is a molded motor structure characterized in that the filler having a fine particle size distribution of the filler is aluminum hydroxide, and the filling in the vicinity of the round hole portion is performed. Since the speed is further reduced, air entrainment is suppressed and shrinkage at the time of molding and solidification is reduced, so that the resistance to the interfacial peeling force between the resin and the substrate is further increased.

  The invention according to claim 10 is a molded motor structure characterized in that a gas escape portion for releasing gas generated during molding is provided in the vicinity of the round hole portion of the jacket. Since the contained gasification component can be pushed out, the filling speed and pressure in the vicinity of the round hole are reduced, so that air entrainment is suppressed and shrinkage during molding and solidification is reduced. And the resistance to the interfacial peeling force of the substrate further increases.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1 to 3, reference numeral 1 denotes a mold motor, which is an armature winding through an insulator 6 formed of an insulating material on a stator core 10 in which thin steel plates such as silicon steel plates having a plurality of slots are laminated. Wire 2 is wound. Reference numeral 11 denotes a bracket which holds the bearing 16. Reference numeral 3 denotes a magnet rotor formed by integrally orienting a plastic magnet with the shaft 9 while being polar-oriented during injection molding, and is rotatably disposed on the inner peripheral side of the stator core 10. Reference numeral 4 denotes a Hall element that detects the magnetic pole position of the magnet rotor 3, and reference numeral 15 denotes a drive IC that incorporates a switching element that controls energization of the armature winding 2 based on an output signal of the Hall element 4. Reference numeral 14 denotes a printed circuit board on which the Hall element 4, the drive IC 15, and other electronic components are mounted, and is built in the mold motor 1. Reference numeral 17 denotes a plurality of connector terminal pins for supplying power to the driving IC 15 and the like, and each one is soldered to a land 7 provided on the printed circuit board 14. Reference numeral 8 denotes a round hole that opens between the lands 7. A plurality of holes 8 are opened in parallel with the longitudinal direction of the lands 7. The stator core 10, the insulator 6, the armature winding 2, the printed circuit board 14, and the connector terminal pins 17 are partially filled with a filler such as aluminum hydroxide (not shown) or calcium carbonate (not shown), and a reinforcing material. As a glass fiber (not shown), needle-shaped wollastonite (not shown) having a length of about 0.1 to 0.2 mm, a low shrinkage agent such as polystyrene for controlling the molding shrinkage rate, and after molding A thermosetting resin 12 such as an unsaturated polyester containing a release agent made of a metal soap such as calcium stearate for controlling demolding is used with an injection mold 19 in a screw molding machine (not shown). The stator 5 is formed by integrally molding to form the outer cover 12a. Here, the position of the connector terminal pin 17 is arranged at a position far from the gate 18 so that the filling speed of the thermosetting resin 12 becomes slow. The aluminum hydroxide that is the filler of the thermosetting resin 12 has two types of particle size distributions, each of which has a center of about 1.5 microns and a center of about 8 microns. Calcium carbonate is approximately centered at about 7 microns. Aluminum hydroxide accounts for 56 wt% of the entire thermosetting resin 12, and calcium carbonate accounts for 11 wt%. Glass fibers are 3 mm in length and 1.5 mm in length, but there are also glass fibers that break to a length of about 0.5 mm due to the back pressure during measurement by the molding machine. Each round hole 8 is filled with a thermosetting resin 12, and short glass fibers such as broken glass fibers and wollastonite are oriented in the thickness direction of the printed circuit board 14, and grains that absorb a large amount of ester resin. A large amount of fine aluminum hydroxide is contained. A gas escape portion 13 is provided in the vicinity of the round hole 8 portion of the jacket 12a.

  According to such a molded motor 1 of the present invention, the round holes 8 are opened between the lands 7, and the round holes 8 are filled with the thermosetting resin 12, thereby filling the round holes 8. Since most of the glass fibers in the thermosetting resin 12 are oriented in the thickness direction of the printed circuit board 14, the molding shrinkage rate in the thickness direction of the printed circuit board 14 in the thermosetting resin 12 in the round hole 8 part is lowered. Accordingly, the motor can be used in a high-temperature and high-humidity space because it can withstand stress concentration due to molding shrinkage and the tensile force at the time of demolding and the interface peeling between the thermosetting resin 12 and the printed board 14 does not occur. However, it is possible to realize a molded motor 1 that ensures high quality without causing tracking.

  In addition, by providing a plurality of round holes 8 opened between the lands 7, the glass fibers are oriented in the thickness direction of the printed circuit board 14, and a plurality of places connecting the front and back of the printed circuit board 14 can be formed. Therefore, since the yield strength against the interfacial peeling force between the thermosetting resin 12 and the printed circuit board 14 is increased, even when the motor is used in a high-temperature and high-humidity space, it is possible to realize a high-quality molded motor 1 that does not cause tracking.

  Further, by arranging the plurality of round holes 8 substantially parallel to the longitudinal direction of the land 7, the glass fiber is oriented in the thickness direction of the printed circuit board 14, and the place connecting the front and back of the printed circuit board 14 is in the longitudinal direction of the land 7. Since it can be made more than one, the yield strength against the interfacial peeling force between the thermosetting resin 12 and the printed circuit board 14 is further increased. realizable.

  In addition, since the reinforcing material contained in the thermosetting resin 12 is made of glass fibers having two or more kinds of lengths, the flowability of the short glass fibers is high regardless of the position of the round holes 8, so that the glass fibers are printed. The amount of the substrate 14 oriented in the plate thickness direction is surely increased. Accordingly, since the proof strength against the interface peeling force between the thermosetting resin 12 and the printed circuit board 14 is further increased, even when the motor is used in a high-temperature and high-humidity space, it is possible to realize a high-quality molded motor 1 that does not cause tracking. .

  In addition, since the thermosetting resin 12 contains a needle-like crystal such as wollastonite, the fluidity of the needle-like wollastonite is high. Is oriented in the thickness direction of the printed circuit board 14. Accordingly, since the mold shrinkage rate in the thickness direction of the printed board 14 in the thermosetting resin 12 in the round hole 8 part is further reduced, the resistance to the interfacial peeling force between the thermosetting resin 12 and the printed board 14 is further increased. Even when used in a high-temperature and high-humidity space, it is possible to realize a molded motor 1 that ensures high quality without causing tracking.

  The stator 5 has a structure in which the stator 5 is integrally molded by a screw type injection molding machine, and the reinforcing material contained in the thermosetting resin 12 is broken by the back pressure during measurement of the injection molding machine and shortened. Since the flowability of the broken short glass fiber is high, the amount of the glass fiber oriented in the thickness direction of the printed board 14 is surely increased regardless of the position of the round hole 8. Accordingly, since the proof strength against the interface peeling force between the thermosetting resin 12 and the printed circuit board 14 is further increased, even when the motor is used in a high-temperature and high-humidity space, it is possible to realize a high-quality molded motor 1 that does not cause tracking. .

  The filler contained in the thermosetting resin 12 is made of aluminum hydroxide and calcium carbonate, and the weight percent of aluminum hydroxide is higher than the weight percent of calcium carbonate, so The amount is larger than the amount of calcium carbonate having a small amount of resin absorption. That is, since the fluidity as the thermosetting resin 12 is lowered, the flow of the thermosetting resin 12 is fast, and the entrainment of air that occurs when the flow direction changes such as the shape change portion is suppressed. Accordingly, the generation of voids in the round hole 8 part is suppressed, the filling amount of the filler that is an inorganic compound in the round hole 8 part is increased, and the proof strength against the interfacial peeling force between the thermosetting resin 12 and the printed board 14 is further increased. Even when the motor is used in a high-temperature and high-humidity space, the molded motor 1 that ensures high quality without causing tracking can be realized.

  In addition, since the filler has a particle size distribution of three or more types, the filler having a coarse particle size has a fast fluidity and the filler having a small particle size has a slow fluidity. In addition, the filling speed can be adjusted for a part that needs to be filled slowly, such as 8 parts of a round hole. Accordingly, unfilling due to a slow filling rate and generation of voids due to a fast filling rate are suppressed, so that generation of voids is suppressed in the vicinity of the round hole 8 part, and the filler is an inorganic compound in the round hole 8 part. And the yield strength against the interfacial peeling force between the thermosetting resin 12 and the printed circuit board 14 is further increased, so that the molded motor 1 capable of further ensuring high quality can be obtained.

  Further, by using aluminum hydroxide as the filler having a fine particle size distribution, the filling speed in the vicinity of the round hole 8 part is further reduced. Accordingly, air entrainment is suppressed, shrinkage during molding and solidification is reduced, and the resistance to the interfacial peeling force between the thermosetting resin 12 and the printed circuit board 14 is further increased, so that the motor is used in a high-temperature and high-humidity space. Even if it is done, the mold motor 1 which ensured the high quality which does not raise | generate tracking is realizable.

  Further, a gas escape portion 13 is provided in the vicinity of the round hole 8 portion of the jacket 12a to release gas generated during molding. With this configuration, the thermosetting resin 12 injected from the gate 18 of the injection mold 19 is filled while extruding a gasifying component such as styrene contained outside the injection mold 19 and is in the vicinity of the round hole 8 part. Filling speed and pressure drop. Accordingly, air entrainment is suppressed, the filling amount of the filler, which is an inorganic compound, in the round hole 8 part is increased, and shrinkage at the time of molding and solidification is reduced. Even if the motor is used in a high-temperature and high-humidity space, a molded motor 1 that ensures high quality without causing tracking can be realized.

  As described above, the molded motor according to the present invention is a ventilator, a water heater, which is an electrical device that is required to achieve downsizing, thinning, and weight reduction while ensuring high quality over a long period of time. Use in air conditioners such as air conditioners, air purifiers, dehumidifiers, dryers, and fan filter units is useful.

Sectional drawing which shows the mold motor in Embodiment 1 of this invention The figure which shows the printed circuit board structure mounted in the mold motor Sectional drawing which shows the state at the time of mold forming of the mold motor The figure which shows the printed circuit board structure which is loaded in the conventional mold motor

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mold motor 2 Armature winding 3 Magnet rotor 4 Hall element 5 Stator 6 Insulator 7 Land 8 Round hole 9 Shaft 10 Stator iron core 11 Bracket 12 Thermosetting resin 12a Jacket | cover 13 Gas escape part 14 Printed circuit board 15 Drive IC
16 Bearing 17 Connector terminal pin 18 Gate 19 Injection mold

Claims (10)

A stator in which an armature winding and a printed circuit board are integrally molded with a resin containing a fibrous reinforcing material and a filler to form a jacket, and the stator is rotatably disposed opposite to the stator. And a molded motor in which a plurality of connector terminal pins are led to the outside, and the printed circuit board is provided with a plurality of lands for soldering the connector terminal pins, and between the lands. A molded motor, wherein a round hole is opened, the round hole is filled with the resin, and the fibrous reinforcing material is oriented in the thickness direction of the printed board. The molded motor according to claim 1, wherein a plurality of the round holes opened between the lands are formed. The molded motor according to claim 2, wherein the plurality of round holes are arranged substantially parallel to the longitudinal direction of the land. The molded motor according to claim 1, wherein the reinforcing material is a fiber having two or more types of lengths. The molded motor according to claim 1, wherein the resin contains a needle-like crystal such as wollastonite. 2. The stator according to claim 1, wherein the stator is integrally molded by a screw-type injection molding machine, and the reinforcing material is broken by a back pressure during measurement of the injection molding machine. The molded motor according to any one of 5. The mold motor according to claim 1, wherein the filler is made of aluminum hydroxide and calcium carbonate, and the weight percentage of aluminum hydroxide is higher than the weight percentage of calcium carbonate. The molded motor according to claim 1, wherein the filler is a filler having three or more types of particle size distributions. 9. The molded motor according to claim 8, wherein the filler having a fine particle size distribution of the filler is aluminum hydroxide. The molded motor according to any one of claims 1 to 9, wherein a gas escape portion for releasing gas generated during molding is provided in the vicinity of the round hole portion of the jacket.

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