JP2589870Y2 - Fan motor lead wire fixing device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fan motor lead wire fixing device for facilitating assembly work.

[0002]

2. Description of the Related Art In various OA equipments, since a heat-generating component is housed in a cabinet having a small volume or a component that is weak against heat is used, a fan motor that operates simultaneously with turning on a power supply is used. FIG. 8 shows an example of this type of fan motor (see Japanese Utility Model Laid-Open No. 4-72859).

In FIG. 1, a fan motor (DC brushless fan motor) 1 has a casing 2 and a rotor 1 having a fan 9 mounted on an outer peripheral portion inside the casing 2.
2. A stator (stator core 11 and coil 10) provided for causing magnetic interference with the rotor 12, a PC board 15 including a circuit for transmitting a signal to the coil 10 of the stator at a predetermined timing, and the like are integrally housed. doing. Casing 2
A hole 2a is provided in a part of the PC board 15 at a position slightly displaced from the lower portion of the PC board 15, and a lead wire having a connection portion at the tip thereof facing the lead wire connection portion 15a of the PC board 15 The bushing 17 holding the 16 is inserted and fixed.

[0004] The lead wire 16 is supported by a bushing 17 in a fixed posture, and the bushing 17 is inserted and fixed in the hole 2a of the casing 2, so that an operator can lead the lead wire 16
Therefore, the lead wires 16 can be easily connected to the PC board 15 at the last stage of the assembly process.

[0005]

However, the fan motor 1 described above has a bushing for improving the assemblability.
There is a problem in that the number of components is increased, and the cost of the entire apparatus is increased.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a fan motor lead wire fixing device which can maintain good assemblability and can be reduced in cost.

[0007]

In order to achieve the above object, the present invention provides a rotor having a fan mounted on an outer periphery thereof,
A stator provided for causing magnetic interference with the rotor is integrally housed inside the casing, and a PC board on which a circuit for transmitting a signal to the coil of the stator at a predetermined timing is arranged at the center side inside the casing. In the fan motor, the spoke portion connecting the center side and the outer peripheral side of the casing has a plurality of grooves connected sequentially from the center side to the outer peripheral side and alternately opening inside and outside the casing. A lead wire to be connected to is formed so that it can be arranged, and the center side of the plurality of grooves is
The connection part at the tip of the lead wire is set to have an inclination angle so as to face the lead wire connection part of the PC board. In this case, the groove may be set in a semicircular shape having a diameter slightly larger than the diameter of the lead wire.

[0008]

According to the above construction, the work of connecting the connection portion of the lead wire to the connection portion of the PC board by soldering can be performed without having a lead wire, so that the assemblability can be improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. In the figure, reference numeral 1 denotes a fan motor (DC brushless fan motor). The fan motor 1
A bearing housing 2d having a lower portion formed on the flange portion 2b and a central portion formed on the cylindrical portion 2c by standing up, and a bearing retainer 3 above and below an inner peripheral portion of the cylindrical portion 2c of the bearing housing 2d. It has bearings 4 and 5 fitted and a rotating shaft 6 rotatably supported by these bearings 4 and 5 on the cylindrical portion 2c of the bearing housing 2d.

The fan motor 1 further includes the rotating shaft 6
, A multi-pole magnetized magnet 8 attached to the inner periphery of the yoke 7, a fan 9 provided integrally with the outer periphery, and a cylindrical portion of the bearing housing 2d. The outer peripheral portion is schematically configured to have a stator core (the coil 10 is wound) 11 which is attached to the outer peripheral portion of 2c and faces the magnet 8 with a slight clearance. The rotating shaft 6, the yoke 7, the magnet 8, and the fan 9 form a rotor 12, which is housed in a resin casing 2 integrally formed with the flange 2b and the bearing housing 2d by injection molding. Reference numeral 14 in the figure denotes a brass bushing for fixing the yoke 7 to the rotating shaft 6.

The outer peripheral portion of the flange portion 2b of the bearing housing 2 rises upward to form an outer cylindrical portion 2e. A plate-shaped PC board (printed circuit board) is provided at a position near the upper end of the outer cylindrical portion 2e from the cylindrical portion 2c of the bearing housing 2d.
15 are extended. The PC board 15 is located at the center side of the casing 13 by being arranged as described above. The PC board 15 has components (not shown) constituting a drive circuit of the fan motor 1 mounted thereon. Reference numeral 16 denotes a lead wire, which supplies a power supply voltage from a power supply circuit (not shown) to the drive circuit,
This is for sending a signal to the coil 10 at a predetermined timing.

Rear surface of casing 2 (lower surface in FIG. 1)
, A plurality of spoke portions 2f are provided radially from a portion corresponding to the nameplate attaching portion 20 provided on the center side, and one of them is formed wide. In this case, the casing 2 and the spokes 2f are integrally formed by injection molding.

The wide spoke portions 2f are sequentially connected from the center side to the outer periphery side, and alternately open to the inside and outside of the casing 2 in the first, second, and third grooves 2h, 2j, 2k.
Are formed. The first, second, and third grooves 2h, 2j, and 2k have a semicircular shape, and the diameter thereof is slightly larger than the diameter of the lead wire 16. Third groove 2h,
The lead wires 16 can be arranged at 2j and 2k. The first groove 2h is formed with a predetermined inclination angle so that the opposite side (the rotation shaft 6 side) of the first groove 2h faces upward in FIG. 1 as compared with the second groove 2j side. When the lead wires 16 are arranged in the grooves 2h, 2j, and 2k, the connection portions 16a at the ends of the lead wires 16 face the lead wire connection portions 15a of the PC board 15. In the figure, reference numeral 21 denotes a lead wire connection portion inside the casing 2
This is a hole for exposing 15a to the outside.

In the fan motor lead wire fixing device configured as described above, the first, second, and third grooves 2h, 2j, 2k
When the lead wire 16 is placed at
16a faces the lead wire connection portion 15a of the PC board 15. Therefore, connect the connecting portion 16a of the lead wire 16 to the PC board.
The work of connecting to the 15 connecting portions 15a by soldering can be performed without having the lead wire 16, and the assembling property can be improved.

The improvement of the assembling property is realized by the casing 2
, 2nd, 3rd grooves 2h, 2j,
Since the lead 16 is fixed to 2k, the number of components does not increase, and the cost can be reduced accordingly.

When the lead wire 16 is connected to the lead wire connection portion 15a by soldering the connection portion 16a at the tip of the lead wire 16, the lead wire 16 is connected to the first, second, and third grooves 2h. , 2
It abuts on the edges of j and 2k, thereby preventing falling off and ensuring the holding.

After the connection of the lead wires 16 is completed, a name plate can be attached to the name plate attaching portion 20, and the appearance can be improved by covering the lead wire connecting portion 15a by attaching the name plate.

[0018]

[Effects of the Invention] Since the present invention is a lead wire fixing device for a fan motor configured as described above, the work of connecting the connection portion of the lead wire to the connection portion of the PC board by soldering is performed by connecting the lead wire. It can be carried out without having it, and the assemblability can be improved. Further, since such an improvement in assemblability is achieved by fixing the lead wire to a groove formed integrally with the casing, the number of parts is not increased and the cost is reduced accordingly. be able to.

[Brief description of the drawings]

FIG. 1 is a sectional view of a fan motor to which the present invention is applied.

FIG. 2 is a perspective view showing a spoke portion of the fan motor.

FIG. 3 is a view of the spoke portion as viewed from the back side.

FIG. 4 is a cross-sectional view showing a portion along line IV-IV in FIG. 3;

FIG. 5 is a sectional view showing a portion along a line VV in FIG. 3;

FIG. 6 is a cross-sectional view showing a portion along the line VI-VI in FIG. 3;

FIG. 7 is a diagram showing a state where a name plate is attached.

FIG. 8 is a cross-sectional view showing an example of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fan motor 2 Casing 2f Spoke part 2h, 2j, 2k 1st, 2nd, 3rd groove 9 Fan 10 Coil 11 Stator core 12 Rotor 15 PC board 15a, 16a Connection part 16 Lead wire

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02K 5/22 H02K 11/00 H01R 9/09

Claims (2)

(57) [Scope of request for utility model registration] A rotor having a fan mounted on an outer peripheral portion thereof;
A stator provided for causing magnetic interference with the rotor is integrally housed inside the casing, and a PC board on which a circuit for transmitting a signal to the coil of the stator at a predetermined timing is arranged at the center side inside the casing. In the fan motor, the spoke portion connecting the center side and the outer peripheral side of the casing has a plurality of grooves which are sequentially connected from the center side to the outer peripheral side and open alternately inside and outside the casing. A lead wire to be connected to is formed so that it can be arranged, and the center side of the plurality of grooves is
A lead wire fixing device for a fan motor, wherein a connection portion at a leading end of a lead wire is set to have an inclination angle so as to face a lead wire connection portion of a PC board. 2. The fan motor lead wire fixing device according to claim 1, wherein the groove is set in a semicircular shape having a diameter slightly larger than the diameter of the lead wire.