JP5791570B2 - Fan - Google Patents

Description

  The present invention relates to a fan, and more particularly, to a circuit board mounting structure.

  In recent years, electric fans have become increasingly multifunctional, such as diversification of functions and mounting of DC motors. Therefore, a circuit (inverter circuit) for creating a power source to be supplied to the DC motor may be required. In that case, it is necessary to mount a relatively large electrical component (for example, a capacitor or the like), and the circuit board tends to increase in size (for example, see Patent Document 1).

Japanese Patent Laying-Open No. 2011-190692 (FIGS. 2 and 3)

In the electric fan of Patent Document 1, electronic components for operation and the like are mounted on a single circuit board, and are accommodated in, for example, a pedestal portion of a stand. For this reason, it is necessary to increase the size of a stand that accommodates a circuit board that has been increased in size with increasing functionality. And the enlargement of the stand has been a problem such as a constraint condition in designing the design of the electric fan and an increase in the amount of material used for the stand, resulting in an increase in cost.

  The present invention has been made to solve the above-described problems, and has an object to reduce the space of the circuit board storage portion of the stand and to improve the design of the electric fan. .

Fan according to the present invention, in the stand for supporting the motor unit for driving the blade, a fan housing the circuit board of the electronic circuit for controlling the operation of the motor unit, the circuit board, two or more The divided circuit boards are arranged so that at least a part thereof overlaps when viewed from above, and the stand has a pedestal portion having an upper wall and a bottom wall, and the pedestal portion includes the pedestal portion. Divided circuit boards are stored, and a plurality of board fixing bosses for fixing the two or more divided circuit boards are provided on the pedestal portion so as to hang down from the upper wall. Of the divided circuit boards, the circuit board other than the circuit board located at the lowest position can be penetrated by the board fixing boss for fixing the circuit board located at the lower position. Through holes are provided The board fixing boss other than the board fixing boss for fixing the uppermost circuit board among the plurality of board fixing bosses has a circuit board corresponding to an end portion penetrating the first through hole. Among the divided circuit boards, the circuit board located at the lowest position is provided with a second through hole through which a part of the corresponding board fixing boss can penetrate, Of the board fixing bosses, the board fixing boss for fixing the circuit board located at the lowest position extends from the end portion and penetrates the second through hole to reach the bottom wall of the pedestal portion. The part is provided .

  In the electric fan according to the present invention, the circuit board is divided into two or more in the stand, and these divided circuit boards are arranged so as to overlap at least partially when viewed from above. As a result, the space occupied by the circuit board can be made smaller than before. For this reason, space saving of the circuit board storage part of a stand can be achieved, and the designability of an electric fan can be improved.

It is a side view which shows the whole structure of the electric fan which concerns on embodiment of this invention. It is a top view which shows the structure of the base part of the electric fan which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the structure of the base part of the electric fan which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which expands and shows the fixing | fixed part of the circuit board of the electric fan which concerns on embodiment of this invention. It is a cross-sectional view which shows the relationship between the lower board | substrate fixed boss | hub of the electric fan which concerns on embodiment of this invention, and a lower board | substrate.

FIG. 1 is a side view showing the overall configuration of a fan according to an embodiment of the present invention.
As shown in FIG. 1, the electric fan 30 according to the embodiment of the present invention is composed of a pedestal portion 10 and a support 23 provided upright on the stand 10, and a blade 22, a blade 22, A protective guard 21 for preventing the hand from touching directly and an electric motor unit 20 for driving the blades 22 are arranged and supported.

FIG. 2 is a top view showing the configuration of the base portion of the electric fan according to the embodiment of the present invention. FIG. 3 is a longitudinal sectional view showing the configuration of the base portion of the electric fan according to the embodiment of the present invention. FIG. 4 is an enlarged longitudinal sectional view showing a fixed portion of the circuit board of the electric fan according to the embodiment of the present invention.
Pedestal 10, and a top wall 6 and bottom wall 7 as shown in FIG. 3, the bottom is closed by a bottom wall 7 is fitted to the pedestal frame 24, fixed to the base frame 24 by pedestal fixing nut 25 Is done. 2 to 4, an electronic circuit for controlling the operation of the electric fan 30 (FIG. 1) is divided into an upper substrate 4 and a lower substrate 3, and the electric motor unit 20 (FIG. 1). And is electrically connected to control operation. In the electric fan 30 using a direct current motor in recent years, as described above, a circuit for generating a power source to be supplied to the direct current motor is required, and the electronic circuit tends to be enlarged. Therefore, in this embodiment, the circuit board of the electronic circuit that controls the operation of the electric fan 30 is composed of an upper board (hereinafter referred to as “operation board”) 4 and a lower board (hereinafter referred to as “power board”) 3 that generates power. The divided circuit boards are arranged so that at least a part of them is overlapped when viewed from above, so that the circuit boards are accommodated in the pedestal 10. Here, as shown in FIG. 4, the power supply board 3 is arranged so as to be within the area of the operation board 4 when viewed from above.

The operation board 4 is fixed by a fixing screw 5 in a fixing hole 4b of the upper board fixing boss 2 provided so as to be suspended from the upper wall 6 of the pedestal portion 10 as shown in FIG. Further, the operation substrate 4 is provided with two through holes 4a which are first through holes, and the lower substrate fixing bosses 1 which are respectively provided so as to be suspended from the upper wall 6 of the pedestal portion 10 are provided. It penetrates.
As shown in FIG. 4, the power supply substrate 3 is fixed to the fixing hole 3 b of the lower substrate fixing boss 1 provided in the pedestal portion 10 and penetrating the through hole 4 a of the operation substrate 4 by the fixing screw 5.

FIG. 5 is a cross-sectional view showing the relationship between the lower substrate fixing boss and the lower substrate (power supply substrate) of the electric fan according to the embodiment of the present invention.
As shown in FIG. 5, the power supply substrate 3 is provided with a through hole 3 a that is a second through hole. The lower substrate fixing boss 1 is provided with a pair of leg portions 1 a that extend from the end portion, pass through the through hole 3 a of the power supply substrate 3, and have the tip reaching the bottom wall 7 of the pedestal portion 10.

  As described above, in the electric fan according to the embodiment of the present invention, the circuit board of the electronic circuit that controls the operation of the electric fan 30 is divided into the operation board 4 and the power supply board 3, and these two divided circuit boards ( The operation board 4 and the power supply board 3) are arranged so that at least a part thereof overlaps when viewed from above (here, the power supply board 3 fits in the area of the operation board 4) and is accommodated in the pedestal portion 10. Since it did in this way, the space which a circuit board occupies when it sees from upper direction can be made smaller than before. In addition, since relatively large electrical components (for example, capacitors) are collectively mounted on the power supply board 3, the relatively large electrical components are stacked as compared with the case where they are distributed and mounted on the divided circuit boards. An increase in the installation space in the height direction when arranged can be suppressed. For this reason, space saving of the circuit board storage part of a stand can be achieved, and the designability of the electric fan 30 can be improved.

  Further, since the upper operation board 4 is provided with a through hole 4a and the power board 3 is fixed to the lower board fixing boss 1 passing through the through hole 4a, even when the power board 3 is smaller than the operation board 4. The structure for fixing the power supply substrate 3 does not need to be provided outside the range of the outer dimensions of the operation substrate 4, and the power supply substrate 3 can be completely accommodated within the projected area as viewed from the operation substrate 4. For this reason, further space-saving design and cost reduction are possible, and the width of the design can be expanded.

  Further, a part (a pair of legs 1a) of the lower substrate fixing boss 1 that penetrates the operation substrate 4 and fixes the power supply substrate 3 further penetrates the through hole 3a provided in the power supply substrate 3, and the tip is a base. Since the lower substrate fixing boss 1 serves as a vertical reinforcing portion of the pedestal portion 10 and is stepped on with a foot or the like, the lower substrate fixing boss 1 is configured to reach the bottom wall 7 of the portion 10. Breakage can be prevented.

In the above-described embodiment, the circuit board is divided into the operation board 4 and the power supply board 3 as an example. However, the number of divisions of the circuit board may be three or more. Also in this case, as in the above-described embodiment, a plurality of substrate fixing bosses (the lower substrate fixing boss 1 and the upper substrate fixing boss 1 in FIG. 4) are fixed to the pedestal portion 10 to fix the circuit board divided into three or more. (Corresponding to the boss 2) is provided to hang down from the upper wall 6. Then, among the divided circuit boards, a circuit board other than the circuit board positioned at the lowest position (corresponding to the power supply board 3 in FIG. 4) is fixed to fix the circuit board positioned lower than the circuit board. A through hole 4a which is a first through hole through which the boss can pass is provided. Further, among the plurality of board fixing bosses, the board fixing bosses other than the board fixing boss (corresponding to the upper board fixing boss 2 in FIG. 4) for fixing the circuit board located at the top are penetrated through the through holes 4a. A corresponding circuit board is fixed to the end. As a result, the space occupied by the circuit board viewed from above can be made smaller than before.
Further, even when the number of circuit board divisions is three or more, a dedicated power supply board 3 is provided, and relatively large electrical parts (for example, capacitors) are collectively mounted on the power supply board 3. That is preferred. Thereby, compared with the case where a comparatively large electrical component is distributed and mounted on a divided circuit board, an increase in the installation space in the height direction when stacked can be suppressed.

  In the above-described embodiment, the power supply board 3 is arranged so as to be accommodated in the area of the operation board 4. However, it is necessary to arrange the power supply board 3 so that the other board is contained in one board area. However, if the divided circuit boards are arranged so as to partially overlap each other, the intended purpose can be achieved.

  Further, in the above-described embodiment, the case where the stand accommodates the circuit board in the pedestal portion 10 has been described as an example. However, for example, the circuit board accommodating portion is secured at the lower portion of the support column 23 of the stand and the circuit is provided there. You may make it accommodate a board | substrate.

  1 Lower board fixing boss, 1a Leg, 2 Upper board fixing boss, 3 Power supply board (lower board), 3a, 4a Through hole, 3b, 4b Fixing hole, 4 Operation board (upper board), 5 Fixing screw, 6 Top wall, 7 bottom wall, 10 base part, 20 motor part, 21 protection guard, 22 blades, 23 struts, 24 base frame, 25 base fixing nut, 30 fan.

Claims (5)

A fan that houses a circuit board of an electronic circuit that controls the operation of the electric motor unit in a stand that supports the electric motor unit that drives the blades,
The circuit board is divided into two or more, and the divided circuit boards are arranged so that at least a part thereof overlaps when viewed from above,
The stand has a pedestal portion having an upper wall and a bottom wall, and the divided circuit board is accommodated in the pedestal portion,
A plurality of board fixing bosses for fixing the circuit board divided into two or more are provided on the pedestal portion so as to hang down from the upper wall,
Of the divided circuit boards, the circuit board other than the circuit board positioned at the lowest position can be penetrated by the board fixing boss for fixing the circuit board positioned at the lower level. A through hole is provided,
Among the plurality of board fixing bosses, the board fixing boss other than the board fixing boss for fixing the uppermost circuit board has a corresponding circuit board at an end portion penetrating the first through hole. Fixed,
Among the divided circuit boards, the circuit board located at the lowest position is provided with a second through hole through which a part of the corresponding board fixing boss can penetrate,
Of the plurality of board fixing bosses, the board fixing boss for fixing the circuit board located at the lowest position extends from the end portion and passes through the second through hole to reach the bottom wall of the pedestal portion. An electric fan characterized in that a leg portion is provided.   The electric fan according to claim 1, wherein the circuit board is divided into an operation board and a power supply board.   The electric fan according to claim 2, wherein the operation board is arranged at the uppermost position.   The electric fan according to any one of claims 1 to 3, wherein a fixing hole for fixing the divided circuit board is provided at the end of the board fixing boss. 5. The electric fan according to claim 4 , wherein the leg portion includes a pair of legs having an arc shape in cross section that are opposed to each other with the fixing hole interposed therebetween.

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