JP3332246B2 - Brushless motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brushless motor.

[0002]

2. Description of the Related Art In a conventional brushless motor, as shown in FIGS. 8 and 9, a bracket body a and a flexible circuit board d having a conductive pattern c interposed between two flexible films b and b are provided. Are separately manufactured, and the strip-shaped lead portion f of the flexible circuit board d is inserted into the hole e of the bracket body a (as shown by the phantom line in FIG. 8) to form an annular shape of the flexible circuit board d. The work of attaching the wiring circuit portion g to the bottom surface h of the bracket body a via the adhesive layer i was required.

[0003]

However, such work is difficult to automate and has to be relied on manually. As a result, considerable effort has been required to assemble the motor.

Accordingly, an object of the present invention is to provide a brushless motor that solves such a conventional problem.

[0005]

In order to achieve the above object, a brushless motor according to the present invention is provided with a conductor pattern and a coating on one surface of a thin metal plate bracket body via an insulating layer.
While laminating in the order of the layers, the insulating layer, the conductor pattern ,
What is claimed is: 1. A brushless motor, comprising: a bracket in which a coating layer and a bracket main body are formed into an integral three-dimensional shape by plastic working, wherein the bracket main body has a shallow dish-shaped motor mounting portion and the motor mounting portion. and extending from the radially outward
A protruding plate-shaped connection end, and the conductor pattern is exposed from the coating layer at a radially outer end of the connection end.
A connector connection portion, and the connector connection portion;
Is connected directly to the external connector
Are connected .

[0006]

[Function] An insulating layer (corresponding to a conventional flexible circuit board) , a conductor pattern, and a coating on one surface of a bracket body.
Since the layers are directly laminated and integrated, the number of assembling steps can be reduced (by omitting the work of attaching a flexible circuit board to a bracket body, etc., which was required in the past), and the insulating layer is bonded. Since the layers are also used, the number of parts can be reduced. Also, mount the motor on the bracket body.
The conductor pad is located at the radially outer end of the connection end protruding from the
The turn is exposed from the coating layer and the connector connection is provided.
This connector connection section is directly connected with the connection end.
The motor can be connected to the motor
The number of parts is further reduced because there is no need to provide
In addition, it is easy to connect to external connectors,
Easy electrical connection and improved workability
Is done.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.

FIG. 1 shows an embodiment of a brushless motor according to the present invention, wherein 1 is a bracket, and the bracket 1 is laminated on a thin metal plate bracket body 2 and one surface of the bracket body 2. And an integrated wiring laminated film body 3.

The laminated film body 3 has elasticity, and is shown in FIGS.
As shown in FIG. 2, the insulating layer 4 is composed of a conductor pattern 5 made of copper foil and an insulating coating layer 6, and is sequentially laminated on a part of the surface 7 of the bracket body 2.

At predetermined portions of the wiring circuit portion 8 (semicircular in the illustrated example) of the sheet body 3, land portions 9 formed by removing the coating layer 6 and exposing the conductive patterns 5 are formed. At the outer end of the strip-shaped lead portion 10 of the sheet body 3, a connector connection portion 11 formed by removing the coating layer 6 and exposing the conductive pattern 5 is formed.

As shown in FIG. 1, a mounting hole corresponding portion 12 is formed in the bracket main body 2 by burring or the like, and one end of a shaft 13 is inserted into the mounting hole corresponding portion 12 and caulked. It is fixed by, for example.

A stator 14 comprising a stator core and a stator coil is fixed to the outer peripheral surface of the shaft 13, and a stator coil lead 15 of the stator 14 is connected to the land 9 by soldering or the like.

Reference numeral 16 denotes a hub. An annular rotor magnet 17 is fixed to an inner peripheral edge of the hub 16 (below the figure), and an outer peripheral surface of the stator 14 and an inner peripheral surface of the rotor magnet 17 are spaced at a minute predetermined interval. Face to face.

The hub 16 is connected to the shaft 13 via bearings 18.
Are rotatably connected to the stator and the control current sent through the laminated film body 3 and the stator coil leads 15.
The hub 16 is rotated in a predetermined direction by the excitation of the rotor 14 and the relative rotation with respect to the rotor magnet 17.

As shown in FIG. 2, the bracket body 2 includes a shallow dish-shaped motor mounting portion 19 and a motor mounting portion 19.
And a plate-like connection end portion 20 extending radially outward from the bottom surface portion of the motor mounting portion 19. A part, a part of the peripheral wall part 22 of the motor mounting part 19, a part of the flange part 23 of the motor mounting part 19, and the connection end 20 are formed.

The connection end 20 is formed in a shape that can be inserted into the connector 24, and the connector connection portion 11 is provided corresponding to the connection end 20. Thereby, the connection between the connector 24 and the conductor pattern 5 of the laminated film body 3 becomes possible.

As described above, since the connector connecting portion 11 protrudes to the outside of the motor while being held on the connecting end portion 20, there is no need to provide a connector on the connector itself. Mounting) is easy, and electrical connection with an external power supply or the like can be easily performed.

Also, there is an accident that the strip-shaped lead portion 10 separates from the bracket body 2 and floats up with the lapse of time and comes into contact with the hub 16 and the rotor magnet 17 as in the conventional sticking type. It can be prevented before it happens.

Next, a method of manufacturing the bracket 1 will be described with reference to FIGS.

First, as shown in (A1) of FIG. 4, (A2) which is an enlarged sectional view of a main part of (A1), and (A) of FIG.
After an insulating layer 4 for insulation treatment is formed on a flat metal substrate 25 such as an aluminum plate or an iron plate as a material of the bracket body 2, a conductor pattern 5 is printed and formed by photo-etching or the like, and a predetermined wiring is formed. Draw a circuit. Further, a coating layer 6 for insulation treatment is laminated on the conductor pattern 5 to form a portion corresponding to the wiring circuit portion 8 and the lead portion 10.

Thus, the laminated film body 3 (the wiring circuit portion 8)
Next, as shown in FIGS. 4 (B) and 5 (B), the metal substrate 25 with the laminated and integrated lead portions 10) is punched to form the motor mounting portion 19 and the connection end portion. A part corresponding to 20 is formed.

Further, the punched bracket body 2 (motor mounting portion 19 and connection end portion 20) is pressed by pressing.
As shown in FIG. 4C and FIG.
And a connection end 20), the bracket 1 is completed.

As described above, since the laminated film body 3 is laminated on the flat metal substrate 25, various processes such as insulation and printing are easy, and the manufacture of the bracket 1 can be automated.

As a result of the experiment, the conductor pattern 5 (see FIG. 3) of the laminated film body 3 is not damaged at the time of the press working, sufficient conduction is secured, and the reliability against cracks, disconnections, etc. is improved. It has been confirmed that there is no problem.

Next, FIG. 6 shows a case where the laminated film body 3 is formed on the back surface 26 of the bracket main body 2. In this case also, the bracket 1 can be manufactured in the same manner as in the above-described embodiment.

This embodiment is different from the embodiment shown in FIG. 1 in that the laminated film 3 is provided on the back surface 26 of the bracket body 2, that is, outside the motor. For this reason, the electrical connection (for example, soldering) of the coil wire derived from the stator 14 can be performed from the outside of the motor, and can be easily performed even if the motor is downsized, thereby improving workability. .

In FIG. 6, a connection terminal 27 such as a pin (connected to the stator coil of the stator 14) can be connected to the land 9 of the laminated film body 3 as shown in FIG.

More specifically, a through hole for inserting the connection terminal 27 is formed in the laminated film body 3 and the bracket body 2, and the connection terminal 27 is inserted into the through hole from the front surface 7 side of the bracket body 2. Then, the tip of the connection terminal 27 is projected from the land portion 9 by a predetermined amount, and the projected tip is connected to the conductor pattern 5 by soldering or the like.

[0029]

Since the present invention is configured as described above, the following significant effects can be obtained.

An insulating layer (corresponding to a conventional flexible circuit board) , a conductor pattern and
Since the coating layers are directly laminated and integrated, the number of assembling steps can be reduced (by omitting the work of attaching the flexible circuit board to the bracket body, etc., which was conventionally required), and the insulating layer can be used. Since it is also used as the adhesive layer, the number of parts can be reduced. Also, the mode of the bracket body
At the radially outer end of the connection end protruding from the
The conductor pattern is exposed from the coating layer and the connector connection
This connector connection section is directly connected with the connection end.
The motor itself can be inserted into the connection connector.
The number of parts is further reduced because there is no need to provide a connector
Connection of external connectors is easy and external power supply
Electrical connection with the
Be improved.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional front view showing one embodiment of the present invention.

FIG. 2 is a perspective view of a bracket.

FIG. 3 is an enlarged sectional view of a main part showing a state in which a laminated film body is laminated on a bracket body.

FIG. 4 is a cross-sectional view for explaining a method of manufacturing the bracket.

FIG. 5 is a plan view for explaining a method of manufacturing the bracket.

FIG. 6 is an enlarged sectional front view showing a modification.

FIG. 7 is an essential part enlarged cross-sectional view showing a connection state between a connection terminal and a conductor pattern.

FIG. 8 is a perspective view showing a conventional example.

FIG. 9 is an enlarged sectional view of a main part of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bracket 2 Bracket body 4 Insulating layer 5 Conductor pattern

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02K 29/00 H02K 3/52 H02K 21/00

Claims (1)

(57) [Claims] 1. A conductor pattern 5 and a coating layer 6 are sequentially laminated on one surface of a thin metal plate bracket body 2 via an insulating layer 4, and the insulating layer 4, the conductor pattern 5 , Coating layer 6
And a bracket 1 in which the bracket main body 2 is formed into an integral three-dimensional shape by plastic working, wherein the bracket main body 2 comprises a shallow dish-shaped motor mounting portion 19 and the motor. A plate-like connection end portion 20 extending radially outward from the attachment portion 19 and projecting therefrom ;
The pattern 5 is covered at a radially outer end of the connection end 20.
The connector connection portion 11 is provided so as to be exposed from the film layer 6.
At the same time, the connector connection portion and the connection end portion 20 are externally connected.
A brushless motor directly inserted into a connector 24 and electrically connected thereto .