JP6479056B2 - Fan - Google Patents

Description

  The present invention relates to a fan that rotates a blade to generate a wind.

  The fan includes a blower that rotates a blade attached to a fan motor to generate a wind. Among such fans, there is one in which a blower section is supported by a support section so as to be rotatable up and down. Further, Patent Document 1 discloses a fan provided with a swing motor for automatically rotating a blower section up and down, that is, a fan having a so-called upper and lower automatic swing function. A fan having an automatic vertical swing function can automatically move up and down in the direction of the wind generated by the rotation of the blades, so it can be easily used as a circulator that circulates indoor air.

Patent No. 5626942 gazette

  However, in the fan disclosed in Patent Document 1, the air blowing unit is supported by the covers that cover the rear of the fan motor being sandwiched from both sides by the support members that are branched to the left and right. As a result, the bifurcated column portion protrudes on both sides of the cover, which hinders the downsizing and weight reduction of the device. Moreover, although the rotating shaft which rotates a ventilation part will be provided in two places used as the support location of the right and left which pinched | interposed the cover, the distance of rotating shafts tends to become large. Therefore, in order to suppress the shift | offset | difference of the rotating shaft on either side, the request | requirement to an assembly precision may become high, and it may cause increase of a manufacturing cost, and the deterioration of assembly property.

  The present invention has been made in view of the above, and has an automatic swinging function up and down, and a fan that can reduce the size and weight of the device, suppress the manufacturing cost, and improve the assemblability. The aim is to get

  In order to solve the problems described above and achieve the object, the present invention provides a blade, a fan motor having the blade attached to the output shaft, and a cover covering an area on the opposite side of the blade sandwiching the fan motor. And a support shaft extending vertically from the side of the support post and extending laterally from the side surface of the support post to rotatably support the air feed unit vertically, and the inside of the cover And a swing motor for rotating the blower section up and down.

  The fan according to the present invention has an effect that it is possible to miniaturize the apparatus, to reduce the weight, to suppress the manufacturing cost, and to improve the assemblability, while having an automatic swinging function vertically.

The perspective view of the fan concerning Embodiment 1 of this invention The side view of the fan of the fan according to the first embodiment The rear view of the fan of the fan according to the first embodiment In the fan according to the first embodiment, a partial enlarged cross-sectional view of a portion where the support portion supports the air blowing portion and viewed from the rear It is the perspective view which looked at the ventilation part of the fan concerning Embodiment 1 from back, Comprising: The figure which shows the state which removed the cover An exploded perspective view of a support in the first embodiment In the fan air according to the first embodiment, a partial enlarged cross-sectional view of the swing mechanism portion as seen from the side Sectional view of the swing mechanism shown in FIG. 7 as viewed from the front

  Hereinafter, a fan according to an embodiment of the present invention will be described in detail based on the drawings. The present invention is not limited by the embodiment.

Embodiment 1
FIG. 1 is a perspective view of a fan according to a first embodiment of the present invention. The fan 50 includes a blower 10 that generates a wind and a base 20 that supports the blower 10.

  FIG. 2 is a side view of the blower unit 10 of the fan 50 according to the first embodiment. The blower unit 10 includes a blade 11 for generating a wind by rotating, a fan motor 12 with the blade 11 attached to the output shaft C, and a cover 13 covering an area opposite to the blade 11 across the fan motor 12. Have. In the following description, the side on which the blades 11 are attached to the fan motor 12 is referred to as the front, and the side on which the cover 13 is provided is referred to as the rear. Further, the side perpendicular to the output shaft C and in the horizontal direction with respect to the fan motor 12 is a side.

  The fan motor 12 rotates the blades 11 around the output shaft C to generate a wind. The front of the blade 11 is covered by a fan guard 14. A plurality of gaps are formed in the fan guard 14, and the wind generated by the rotation of the blades 11 is blown out through the gaps. In addition, by covering the front of the blade 11 with the fan guard 14, it is possible to prevent the fingers and foreign matter from touching the blade 11 and to improve the safety.

  Returning to FIG. 1, the base 20 has a support 21 that rotatably supports the blower 10 and a pedestal 22 that holds the support 21 from below and allows the fan 50 to be erected. An operation switch 22 a for operating and stopping the fan 50 is provided on the upper surface of the pedestal 22.

  The support portion 21 has a rod-like support portion 23 extending vertically. The lower portion of the support 23 is held by the pedestal 22. FIG. 3 is a rear view of the blower 10 of the fan 50 according to the first embodiment. The upper portion of the support 23 is inserted inside the cover 13. A notch 13 a is formed in a portion of the cover 13 which overlaps with the support 23 as viewed from the rear.

  FIG. 4 is a partial enlarged cross-sectional view of a portion of the fan 50 according to the first embodiment in which the support portion 21 supports the air blowing portion 10 and viewed from the rear. The blower unit 10 is rotatably supported up and down at an upper portion of the support 23 of the support unit 21. The support portion 21 has a support shaft 24 which protrudes laterally and in opposite directions from the side surface of the support portion 23. The support shaft 24 has a cylindrical shape, and may be fixed to the support 23 by a screw or may be integrally molded with the support 23.

  A bearing 15 is fitted to each of the support shafts 24. The bearing 15 is rotatable around a swing axis D which is a central axis of the support shaft 24 having a cylindrical shape in a state where the bearing 15 is fitted. A fixing plate 27 is fixed to the bearing 15 and the fan motor 12 is fixed to the fixing plate 27 so that the blower unit 10 including the fan motor 12 can rotate up and down around the swing axis D. Be done. If the bearing 15 is fixed to any of the components of the blower 10, the blower 10 can be rotated up and down about the swing axis D.

  Next, the structure of a mechanism for automatically rotating the air blower 10 including the fan motor 12 up and down, that is, the configuration of a so-called vertical automatic swing mechanism will be described. FIG. 5 is a perspective view of the blower unit 10 of the fan 50 according to the first embodiment as viewed from the rear, and shows a state in which the cover 13 is removed. FIG. 6 is an exploded perspective view of the upper and lower automatic swing mechanism portion of the support column 23 in the first embodiment.

  The vertical swing mechanism includes a swing motor 16 provided in the blower 10, a blower side gear 17 attached to the output shaft 16a of the swing motor 16, and a support fixed to the support 23 and meshed with the blower side gear 17. A part gear 25 is provided. The swing motor 16 and the blower unit side gear 17 are provided inside the cover 13. The output shaft 16a of the swing motor 16 is parallel to the swing axis D shown in FIG. The support portion side gear 25 has a shape obtained by cutting off a part of a gear having a circular shape, that is, a shape in which a plurality of teeth are formed on an arc-like outer peripheral surface. The outer peripheral surface on which the teeth of the support portion side gear 25 are formed is an arc-shaped surface centering on the swing axis D. In the first embodiment, the swing motor 16 is fixed to the fixing plate 27 fixed to the bearing 15, but may be fixed to any component of the blower unit 10.

  Since the support portion side gear 25 is fixed to the support portion 23, when the swing motor 16 rotates the blower portion side gear 17, the blower portion side gear 17 moves along the outer periphery of the support portion side gear 25. By moving the swing motor 16 together with the blower unit side gear 17, the blower unit 10 to which the swing motor 16 is fixed rotates up and down around the swing shaft D. By making the rotation direction of the blower unit side gear 17 different at a constant interval by the swing motor 16, it is possible to make the blower unit 10 automatically perform the vertical swing operation.

  FIG. 7 is a partial enlarged cross-sectional view of the fan mechanism 50 according to the first embodiment, viewed from the side with the swing mechanism portion enlarged. In FIG. 7, the left side of the drawing is the front, and the right side of the drawing is the rear. FIG. 8 is a cross-sectional view of the swing mechanism shown in FIG. 7 as viewed from the front. In FIG. 8, hatching of the urging unit 26 is omitted. The swing mechanism of the fan 50 is provided with a biasing unit 26 that applies a biasing force to the blower unit 10 in the direction opposite to the rotation direction.

  In the first embodiment, a torsion spring is illustrated as the biasing portion 26. One end of the biasing portion 26 is fitted and fixed to the concave portion 25 a of the support portion side gear 25, and the other end of the biasing portion 26 is fixed to the concave portion 15 a formed in the bearing 15. When the center of gravity of the blower 10 is at the same position G1 as the swing axis D, the biasing unit 26 is not twisted and is in a neutral state in which the biasing force is not exerted. From that state, the blower 10 rotates in the direction indicated by the arrow Y, and from the position G1 where the center of gravity of the blower 10 is at the same height as the swing axis D to a position G2 higher than the swing axis D When it rotates to move, the bearing 15 also rotates in the direction shown by the arrow Y. As the bearing 15 rotates in the direction indicated by the arrow Y, the recess 15a also rotates in the direction indicated by the arrow Y, and the biasing portion 26 is twisted. The restoring force of the biasing unit 26 is a biasing force that causes the blower unit 10 to rotate in the direction indicated by the arrow X.

  The blower 10 rotates in the direction indicated by the arrow W so that the position of the center of gravity of the blower 10 moves from the position G1 having the same height as the swing axis D to a position G3 lower than the swing axis D. When rotated, the bearing 15 also rotates in the direction indicated by the arrow W. When the bearing 15 rotates in the direction indicated by the arrow W, the recess 15 a also rotates in the direction indicated by the arrow W, and the biasing portion 26 is twisted. The restoring force of the biasing unit 26 is a biasing force that causes the blower unit 10 to rotate in the direction indicated by the arrow V.

  According to the fan 50 described above, since the support 23 that rotatably supports the blower 10 is formed in a single rod shape and is inserted inside the cover 13, the support 23 is a part of the cover 13. The device can be miniaturized rather than exposed on both sides. Moreover, weight reduction can be achieved by miniaturizing the support 23 itself. Further, the design can be improved as compared with the case where the support portions project on both sides of the cover 13.

  The swing shaft D, which is the rotation shaft of the blower 10, is provided at two points, the support shaft 24 provided on one side of the support 23 and the support shaft 24 provided on the other side. . Therefore, the distance between the swing axes D provided at two places can be easily reduced. By bringing the swing axes D close to each other, it becomes difficult for the shift of the rotation axis to occur. Therefore, the requirement for assembly accuracy can be suppressed, and the manufacturing cost can be suppressed and the assemblability can be improved.

Further, the biasing portion 26 applies a biasing force to the blower unit 10 in the direction opposite to the rotational direction, whereby knocking generated during the rotational operation of the blower unit 10 can be suppressed. Here, knocking of the blower unit 10 is likely to occur when the meshing between the teeth of the blower unit side gear 17 and the support unit side gear 25 is released during the rotation operation. The meshing between the teeth of the blower unit side gear 17 and the support unit side gear 25 becomes easier as the center of gravity of the blower unit 10 moves away from the position G1.

  That is, as the center of gravity of the blower 10 approaches the positions G2 and G3 rather than the position G1 shown in FIG. Is more likely to occur. In the first embodiment, as the center-of-gravity position of the blower 10 approaches the positions G2 and G3, an urging force that is opposite to the rotational direction is applied to the blower 10, and The meshing of the teeth with the support portion side gear 25 is less likely to be released, and the occurrence of knocking can also be suppressed.

  In the first embodiment, the example in which the two support shafts 24 are provided in the support 23 has been described, but the present invention is not limited thereto. As long as sufficient strength to support the blower unit 10 can be obtained, the blower unit may be supported by one support shaft 24.

  The configuration shown in the above embodiment shows an example of the contents of the present invention, and can be combined with another known technique, and one of the configurations is possible within the scope of the present invention. Parts can be omitted or changed.

Reference Signs List 10 air blower, 11 blades, 12 fan motor, 13 cover, 13a notch, 14 fan guard, 15 bearing, 15 a recess , 16 swing motor, 16 a output shaft, 17 air blower side gear, 20 base, 21 support, 22 pedestal part, 22a operation switch, 23 post part, 24 support shaft, 25 support part gear, 26 biasing part, 50 fan, C output shaft, D swing shaft.

Claims (2)

A blower having a blade, a fan motor having the blade attached to the output shaft, and a cover covering an area opposite to the blade sandwiching the fan motor;
A column extending up and down and having an upper part inserted inside the cover;
A support shaft which protrudes laterally from the support portion and rotatably supports the air blowing portion up and down, and is provided inside the cover;
A swing motor provided inside the cover to rotate the blower up and down;
A blower side gear mounted on an output shaft of the swing motor;
A support-side gear that is fixed to the support portion inside the cover and that meshes with the blower-side gear;
And an urging unit that applies an urging force to the air blowing unit in a direction opposite to the rotation direction when the air blowing unit is rotated by the rotation of the air blowing unit side gear .
The biasing unit is configured such that the center of gravity of the blower is lower than the rotation axis of the blower when the blower is rotated in a direction such that the center of gravity of the blower is higher than the rotation axis of the blower. made when the blower in the direction rotates, fan, characterized that you impart biasing force in a direction opposite to the rotation direction with respect to the blower unit. The biasing portion is a torsion spring,
The fan according to claim 1 , wherein the torsion spring is in a neutral state in which no biasing force is applied in a state in which the center of gravity of the air blowing portion is at the same height as the rotation axis of the air blowing portion .

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