JPH0621379U - Brushless motor - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the work of soldering the coil ends of the core winding set to the printed circuit board. A flexible printed circuit board 7 is bent and protruded from an upper end surface of a stator core 10, and a coil end 11A of the stator core 10 is soldered to a terminal portion 6 formed on the upper end surface side. Since the soldering is performed at a position higher than the stator core 10, the work becomes easy.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a brushless motor used as a drive source for various electronic devices.

[0002]

[Prior art]

 A structure as shown in FIG. 4 is known as a conventional brushless motor. A rotor case 23 is fixed to a shaft 22 rotatably supported by the stator plate 21, and a rotor magnet 24 is fixed to an inner surface of the rotor case 23.

A holder 25 fixed on the stator plate 21 via a shaft 22, a bearing 22 and a bearing 26 has a core winding set 29 including a stator core 27 and a coil winding 28 wound around the stator core 27. The coil end 28A of the coil winding 28 that is supported is connected to the circuit board 30 fixed on the stator plate 21 by soldering.

[0004]

[Problems to be solved by the device]

 By the way, in the conventional brushless motor, it is difficult to secure a space for soldering the coil terminal to the circuit board when it is downsized and flattened, so that there is a problem that the assembly work becomes complicated.

That is, since there is no space for inserting a soldering iron during soldering, it is necessary to previously solder the coil terminal to the circuit board and then incorporate the core winding set into the stator plate. Becomes complicated.

The present invention has been made in consideration of the above problems, and an object thereof is to provide a brushless motor that can be easily assembled.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention folds a flexible print substrate disposed on a stator substrate so as to protrude from the upper end face of the stator core, and the bent flexible printed circuit board has an upper end face side from the stator core. A terminal portion is formed in the terminal, and the coil terminal of the coil winding wound around the plurality of salient poles of the stator core is connected to the terminal portion.

[0008]

[Action]

 The flexible printed board is bent and projected from the upper end surface of the stator core, and the coil end of the coil winding of the stator core is connected to the terminal portion formed on the upper end surface side. After assembling the core winding set into the stator plate, the coil terminal may be connected to the terminal portion on the upper end surface side of the flexible printed board, so that the assembling work can be performed easily.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an assembly view showing a brushless motor according to an embodiment of the present invention, in which a holder 3 having a step portion 2 is provided in a shaft direction on a stator plate 1 such as an iron plate, and an opening 4 is formed as shown in FIG. A flexible printed circuit board 7 having a desired conductive pattern is formed on the stator plate 1 by inserting the holder 3 into the opening 4. Set up.

When the flexible printed circuit board 7 is thus inserted into the holder 3, the extension portion 5 is bent by the side surface 3A of the holder 3 due to this flexibility, and the end portion 6 is formed from the stator core as described later. It is configured to project to the upper end side. On the flexible printed board 7, a conductive pattern 8 (FG or PG pattern) for power generation is formed as shown in FIG. Reference numeral 9 is a bearing, and 9'is a shaft insertion hole.

Reference numeral 10 denotes a stator core, and a coil winding 11 is wound around a plurality of salient poles 10 A to form a core winding set 12. The opening 13 of the stator core 10 is formed to have a diameter such that it is supported by the step portion 2 when the core winding set 12 is inserted into the holder 3, and its height dimension H is a flexible print after insertion. The terminal portion 6 of the substrate 7 is formed so as to project from the stator core 10 toward the upper end surface side. A rotor case 14 is fixed to the shaft 15.

With the above arrangement, first, the core winding set 12 is assembled by inserting the opening 13 of the stator core 10 into the holder 3 on the stator plate 1. As a result, the stator core 10 is supported by the step portion 2, and the terminal portion 6 of the extension portion 5 of the flexible printed circuit board 7 which is bent by the side surface 3A of the holder 3 is protruded from the upper end surface side of the stator core 10. It

Next, the coil end 11 A of the coil winding 11 is soldered to the upper end surface of the stator core 10 and connected to the terminal portion 6 protruding to a position higher than the stator core 10. Since the soldering is performed at a position higher than the stator core 10, the work can be easily performed. Next, the shaft 15 of the rotor case 14 is inserted into the shaft insertion hole 9'of the holder 3 to assemble the brushless motor.

According to this embodiment, the extension portion 5 of the flexible printed circuit board 7 having the terminal portion 6 formed by the side surface 3A of the holder 3 on the stator plate 1 is bent in advance, In this state, the core winding set 12 is assembled so that the terminal portion 6 projects toward the upper end surface side of the stator core 10, and then the coil end 11A of the coil winding 11 is soldered to the terminal portion 6 at a position higher than the stator core 10. As a result, the brushless motor can be easily assembled. In addition, along with this, it is possible to cope with miniaturization and flattening more easily than before.

FIG. 3 shows another embodiment of the present invention, in which the flexible printed circuit board 7 forms only a wiring pattern, and the conductive pattern 8 for power generation is formed on the surface of the stator plate 1. The following shows an example. Also in this embodiment, the same effect as the above embodiment can be obtained only by changing the shape of the flexible printed board 7.

Although the outer rotor type has been described in the embodiment, the inner rotor type can be similarly applied. Further, although the flexible printed circuit board has been described in the example of being previously assembled in the holder, the flexible printed circuit board may be assembled in the middle of the process without being limited to this.

[0017]

[Effect of device]

 As described above, according to the present invention, the flexible printed circuit board is bent and protruded from the upper end surface of the stator core, and the coil end of the stator core is connected to the terminal portion formed on the upper end surface side. Assembly work can be performed easily.

[Brief description of drawings]

FIG. 1 is an assembly view showing an embodiment of a brushless motor of the present invention.

FIG. 2 is a plan view showing a flexible printed circuit board used in this embodiment.

FIG. 3 is a perspective view showing another embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 1 Stator board 3 Holder 6 Terminal part 7 Flexible printed board 8 Conductive pattern for power generation 11 Coil winding 11A Coil terminal 12 Core winding set

Claims (2)

[Scope of utility model registration request] 1. A flexible printed circuit board disposed on a stator plate is bent to protrude from an upper end surface of a stator core,
A terminal portion is formed on the upper end surface side of the stator core of the bent flexible printed circuit board, and the coil terminal of the coil winding wound around the plurality of salient poles of the stator core is connected to the terminal portion. A characteristic brushless motor. 2. The brushless motor according to claim 1, wherein a conductive pattern for power generation is formed on the flexible printed circuit board arranged on the stator plate.