JP3013145B2 - Small motor with circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a metal wiring board formed in a circuit pattern, an insulating resin material molded on one surface of the metal wiring board, the metal wiring board and the resin. The present invention relates to a small motor with a circuit mounted on the opening side of a motor case in a state where materials are superimposed.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 6, electronic components 2 and 2 (only two are shown in the figure) such as integrated circuits and resistors are connected to a metal wiring board 1 formed in a circuit pattern.
There is known a small motor with a circuit 5 in which an insulating resin material 3 is molded on one surface 1a of the metal wiring board 1 and mounted on the opening side of the motor case 4 in a state where the metal wiring board 1 and the resin material 3 are superposed. (For example, Japanese Utility Model Application Laid-Open No. 62-21760).
Reference).

[0003]

In the small motor with circuit 5 constructed as described above, since the electronic components 2 and 2 are located on the same plane, the integration ratio of the number of components to be arranged is small. , And it is difficult to reduce the size and accuracy of the motor.

The present invention has been made in view of the above circumstances, and can improve the integration ratio of the number of components to be arranged without sacrificing height.
It is an object of the present invention to provide a small-sized motor with a circuit capable of realizing miniaturization and high accuracy of the motor.

[0005]

Means for Solving the Problems In order to achieve the object, an invention according to claim 1 includes a metal wiring board formed in a circuit pattern and a mold formed on one surface of the metal wiring board. In a small motor with a circuit mounted on an opening side of a motor case in a state where an insulating resin material, the metal wiring board and the resin material are superimposed, a surface side of the resin material on which the metal wiring board is superimposed Formed through
And no recess, the formed in a part of the metal wiring board Rutotomoni the circuit pattern is cut so as to be positioned within the recess
A bent portion in a connected state, and an electronic component mounted in the recess so as to straddle the bent portion,
The circuit pattern of the metal wiring board in the electronic component
The gist is to provide by polymerization .

[0006] The invention described in claim 2 is the above- described invention .
In addition to the invention, the electronic component includes the metal wiring board and the electronic component.
Into the recess via a holder interposed between
The point is that it is attached. Ma
The invention according to claim 3 is, in addition to the above-described inventions,
A brush is attached with a brush holder made of resin material
The metal wiring board is overlapped on the surface opposite to the surface.
Together with the recess.

[0007]

According to the structure of the first aspect,
A metal wiring board is formed in a circuit pattern shape, an insulating resin material is molded on one surface of the metal wiring board, and a concave portion is formed on a surface side of the metal wiring board made of the resin material, and the metal wiring is formed. The bent part formed in a part of the plate is located in the concave part, the electronic component is mounted in the concave part so as to straddle the bent part, and the metal wiring board and the resin material are superimposed on the opening side of the motor case. It is attached with.

[0008] In the configuration according to the second aspect , the holder is placed in the recess, and the electronic unit is inserted through the holder.
The product is attached. That is, the circuit pattern of the metal wiring board
And the electronic components are superposed and arranged.
Become. Further, in the configuration according to the third aspect, the brush
The recess is located on the side opposite to the side where
Abrasion powder generated between the brush and the commutator
There is no accumulation in the part.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a small motor with a circuit according to the present invention will be described with reference to FIGS.

Referring to FIG. 1, a small motor 10 with a circuit
Is a motor case 11 having a substantially cylindrical shape with a bottom, a rotating shaft 13 having one end 13 a rotatably held at the center of the motor case 11 via a bearing 12, and a magnet fixed to the inner peripheral surface of the motor case 11. 14, a rotor core 16 fixed to a rotating shaft 13 via a holder 15 so as to face the magnet 14, a coil 17 wound around the rotor core 16, and a predetermined coil as shown in FIG. A metal wiring board 18 formed in a circuit pattern, a brush holder 19 made of an insulating resin molded on one surface 18a of the metal wiring board 18, and a commutator 20 fixed to the rotating shaft 13
And a brush 21 mounted on the brush holder 19 so as to be in sliding contact with the commutator 20, and a lid 2 for closing the opening 11a.
2 is provided.

The brush holder 19 is used for the motor case 11.
The other end 1 of the rotating shaft 13 is located near the opening 11a
3b is held via a bearing 23. Also, one surface 19 of the brush holder 19 on which the metal wiring board 18 is superimposed.
A is formed with a concave portion 19b.

A bent portion 18b formed on a part of the metal wiring board 18 is located in the concave portion 19b. In the recess 19b and on the other surface 19c opposite to the one surface 19a of the brush holder 19, electronic components 2 such as integrated circuits and resistors are provided.
4, 24... Are provided.

[0013] Of these electronic components 24, 24, ...
As shown in (A), the connection terminals 24a, 24a of the electronic component 24 located on the other surface 19c side are
Is connected to the metal wiring board 18 by the solder 25,
As shown in FIG. 3B, the connection terminals 24a of the electronic component 24 provided in the recess 19b are connected to the metal wiring board 18 by the solder 25 as they are. The electronic component 24 provided in the concave portion 19b is located in the concave portion 19b so as to straddle the bent portion 18b.

Therefore, the recess 19b is formed in the brush holder 18 as a relatively thick resin material, and the electronic components 24 are not simply mounted on both sides of the metal wiring board 18. Is provided, the integration ratio can be secured without sacrificing the height direction (the direction along the axis of the rotating shaft 13) of the small motor with circuit 10.

The electronic component 24 located in the concave portion 19b may be provided by being held by a holder 26 interposed between the bent portion 18b and the electronic component 24, as shown in FIG.

In the above embodiment, the brush holder 1
Although a recess 19b is formed on one surface 19a of the brush holder 19 which is superimposed on the metal wiring board 18 as shown in FIG. A concave portion 19b is formed on the surface 19c,
As shown in FIG. 5B, an electronic component 24 (first electronic component) is provided in the concave portion 19b, and another electronic component 2 is provided so as to straddle the electronic component 24 provided in the concave portion 19b.
4 (second electronic component) to provide the metal wiring board 1
It is also possible to use a conventional product for 8. In this case, the connection terminals 24a, 24a of the electronic components 24, 24 are
It is connected to the metal wiring board 18 by solder 25 while penetrating the brush holder 19.

In the above configuration, after the magnet 14 is fixed to the motor case 11 and the holder 15, the rotor core 16, and the coil 17 are assembled to the rotating shaft 13, the small motor 10 with a circuit One end
3 a is held by the motor case 11 via the bearing 12.

Next, a brush holder 19 is molded on one surface 18a of the metal wiring board 18 formed in a circuit pattern and having a bent portion 18b, and the metal wiring board 18 and the brush holder 19 are superposed. Electronic components 24,2
4. Attach to the motor case 11 by attaching
After the other end 13 b of the rotating shaft 13 is rotatably held via the bearing 23, the opening 11 a is closed by the lid 22.

Small motor with circuit 10 assembled
When the power is supplied to the coil 17, the rotating shaft 3 is rotated by the current flowing through the coil 17 and the magnetic force of the magnet 14.

[0020]

As described above, in the small motor with circuit of the present invention, the metal wiring board made of resin material is superposed.
By forming a recess that does not penetrate on the surface side that has been made, and by being able to attach electronic components in this recess,
The circuit pattern of the metal wiring board and the electronic components are superposed and arranged
As a result, the integration ratio of the number of components to be arranged can be improved without sacrificing the height, and the motor can be reduced in size and higher in accuracy.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a small motor with a circuit according to the present invention.

FIG. 2 is a plan view of the brush holder.

3A is a cross-sectional view of a main part of FIG. 1 in a state where the top and bottom are reversed, and FIG. 3B is a cross-sectional view taken along the line AA of FIG. 3A.

FIG. 4 shows a modification of the small motor with circuit of the present invention,
It is sectional drawing of the principal part corresponding to the state which turned upside down of FIG.

5A and 5B show a second embodiment of a small motor with a circuit according to the present invention, wherein FIG. 5A is a cross-sectional view of a main part corresponding to a state where the top and bottom of FIG. 1 are reversed, and FIG. FIG.

FIG. 6 is a longitudinal sectional view showing a conventional small motor with a circuit.

[Explanation of symbols]

 Reference Signs List 10 small motor with circuit 11 motor case 11a opening 18 metal wiring board 18a one surface 18b bent portion 19 brush holder (resin material) 19a one surface 19b concave portion 19c other surface

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-39587 (JP, A) JP-A-5-22919 (JP, A) Fully open 62-21760 (JP, U) Fully open Showa 56- 78478 (JP, U) Japanese Utility Model Showa 62-74362 (JP, U) Japanese Utility Model Showa 56-2269 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02K 3/30-3 / 52 H02K 5/00-5/26 H02K 13/00 H02K 23/00 H05K 1/18

Claims (3)

(57) [Claims] 1. A state in which a metal wiring board formed in a circuit pattern shape, an insulating resin material molded on one surface of the metal wiring board, and the metal wiring board and the resin material are polymerized. A small motor with a circuit mounted on the opening side of the motor case, wherein the non-penetrating recess formed on the surface side of the resin material on which the metal wiring board is superimposed; and the metal wiring so as to be located in the recess. formed on a part of the plate Rutotomoni the circuit path
A bent portion in which the turns are connected without being cut, and an electronic component mounted in the recess so as to straddle the bent portion, and the circuit pattern of the metal wiring board in the recess.
A small-sized motor with a circuit, wherein the small-sized motor is provided by superimposing the electronic component . 2. The circuit with a circuit according to claim 1, wherein the electronic component is mounted in the concave portion via a holder interposed between the metal wiring board and the electronic component. Small motor. 3. A brush holder, wherein the resin material is a brush holder.
Place the metal wiring on the surface opposite to the surface
3. The small motor with a circuit according to claim 1, wherein the plates are arranged in an overlapping manner and the recess is formed .