JP4594492B2 - Molded motor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a molded motor.
[0002]
[Prior art]
The mold motor has a structure in which a rotor is mounted in a casing after a wiring board constituting a stator and a drive circuit is molded with a mold resin to form a casing.
[0003]
[Problems to be solved by the invention]
When performing the above molding, the electronic component attached to the wiring board is also covered with the molding resin. Therefore, since the electronic component may be destroyed by the pressure and temperature of the mold resin during the molding, it is difficult to use a cheap electronic component that is weak in pressure and temperature.
[0004]
Therefore, in view of the above problems, the present invention provides a structure that can be attached to a wiring board of a molded motor even if it is an electronic component that is weak against pressure and temperature.
[0005]
[Means for Solving the Problems]
According to the first aspect of the present invention, in the molded motor in which at least the stator and the wiring board are molded with a mold resin, the protective case for protecting the electronic components is made of synthetic resin and has a box shape. Five of the surfaces are fixed, the other surface is formed with a door that can be opened and closed, and a plurality of notches are formed on one of the fixed surfaces, the wiring board covered by the protective case of the electronic component provided on, by the molded by subsequent molding resin, wherein the electronic component is a molded motor, characterized in that to prevent breakage due to pressure and temperature due to the mold resin.
[0006]
According to the present invention, since the electronic component provided on the wiring board is accommodated in the protective case, the electronic component is not destroyed by pressure and temperature even if it is covered with a mold resin.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
[0008]
FIG. 3 is a longitudinal sectional view of the molded motor 10 showing an embodiment of the present invention.
[0009]
In the molded motor 10, as shown in FIG. 3, a coil 16 is wound around a stator core 12 to form a stator 16, and a wiring board 18 is disposed on one side surface of the stator 16. A driving circuit for driving the mold motor 10 is configured on the wiring board 18, and a transistor 20, a resistor 22, an aluminum electrolytic capacitor (hereinafter simply referred to as a capacitor) 24, etc., which are electronic components for that purpose, are attached. . Of these, the capacitor 24 that is sensitive to pressure and temperature is covered with a protective case 26. The configuration of the protective case 26 will be described later.
[0010]
The stator 16 and the wiring board 18 are molded with a mold resin 28 to form a casing 30.
[0011]
A rotor 34 is inserted into the casing 30 via a bearing 32 and fixed by a bracket 36.
[0012]
Next, the protective case 26 will be described with reference to FIGS. 1 and 2.
[0013]
As shown in FIG. 1, the protective case 26 is a box made of synthetic resin, and a door 38 provided on the front surface is provided so as to be freely opened and closed. In addition, a pair of cutouts 40 are provided on the bottom surface of the protective case 26 continuously from the front opening. Further, only the bottom portion is configured to be thinner than the other portions.
[0014]
The protective case 26 configured as described above is attached to the capacitor 24 protruding from the wiring board 18 as shown in FIG. That is, the pair of legs 42 and 42 of the capacitor 24 are inserted into the pair of notches 40 and 40, and the capacitor 24 is accommodated in the protective case 26. Thereafter, the door 38 is closed, and the main body of the capacitor 24 is completely stored in the protective case 26.
[0015]
When the wiring board 18 is molded with a molding resin after such a state, the capacitor 24 is protected by the protective case 26, so that it is not destroyed by pressure or temperature.
[0016]
The protective case 26 is formed of synthetic resin in the above embodiment, but may be formed of other materials as long as it is an insulator instead.
[0017]
Further, in this embodiment, the capacitor 24 is housed in the protective case 26. However, in addition to this, when using an electronic component such as a transistor weak in pressure and temperature, it is appropriate that the electronic component is also housed in the protective case 26. It is.
[0018]
【The invention's effect】
As described above, in the molded motor of the present invention, the electronic component is not destroyed by the pressure or temperature of the mold resin by storing the electronic component in the protective case. Therefore, it can be constituted by an inexpensive electronic component.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a molded motor showing an embodiment of the present invention.
FIG. 2 is a perspective view of a protective case.
FIG. 3 is a perspective view showing a state in which a capacitor is housed in a protective case.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Mold motor 18 Wiring board 24 Capacitor 26 Protection case 28 Mold resin 38 Door 40 Notch part 42 Leg

Claims (1)

In a mold motor in which at least a stator and a wiring board are molded with a mold resin,
The protective case that protects the electronic parts is made of plastic and has a box shape, and five of the six faces of the box shape are fixed.
The remaining one surface is formed with a door that can be opened and closed, and one of the fixed surfaces is formed with a plurality of notches,
Covering the electronic component provided on the wiring substrate by the protective case, by which is molded by subsequent molding resin, the molded motor, wherein the electronic component is prevented from being broken due to pressure and temperature due to the mold resin.

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