JPH0329591Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to an electric fan, and particularly to the structure of a swinging device for an electric fan. <Prior art> As a conventional electric fan, for example, the Utility Model No. 56-11394
The one described in the No. Publication is known. As shown in FIGS. 1a and 1b and FIG.
The head 4 is comprised of a stand 7 which is swingably supported by support shafts 5 and 6, and a swing device 8 which swings the head 4.

As shown in FIG. 2, the swinging device 8 includes a swinging motor 8a, which is located in a position spaced apart from the support shaft 6 in the stand 7, and has a rotating shaft protruding from the top surface of the stand 7, and A rotating arm 8b that is fixed to the rotating shaft of the motor 8a and whose free end side rotates at a predetermined rotation radius; and a protrusion 8c that projects from a position spaced from the support shaft 6 at the bottom of the head 1. and,
It is comprised of a rod 8d that connects the rotating arm 8b and the protrusion 8c and is pivotally supported by each of them.

Such a swinging device 8 includes a rotating arm 8b, a rod 8d, a head (protrusion 8c to a connecting portion of the support shaft 6),
The 4-link mechanism consisting of the stand (the connecting part of the support shaft 6 to the rotating shaft of the swing motor 8a) is connected to the swing motor 8.
By driving with a driving force of a, the head 1 can be oscillated within a predetermined angular range.

<Problems to be Solved by the Present Invention> However, in the above-mentioned electric fan, since the swinging device is constituted by the above-mentioned four-link mechanism, the space occupied by the swinging device 8 is relatively large.
Moreover, since the swinging device 8 is arranged at a position apart from the support shaft 6, the stand 7 becomes large in size, and there is not much freedom in its design.

In addition, the swing motor 8 located at a separate position
Since the structure is such that the rod 8d connects the rod 8d and the head 1, the rod 8d and its surroundings (swivel arm 8b, protrusion 8c, etc.) are exposed to the outside, resulting in an unsightly appearance. It was hot. If the stand 7 were to be formed so as to completely hide the swinging device 8, the stand 7 would have to be large in size.

The present invention aims to solve the above-mentioned problems, and provides a fan that is compact and has a clean appearance.

<Means for Solving the Problems> To this end, the present invention provides a cylindrical column supporting the head at the lower part of the head equipped with a fan and a fan motor for rotating the fan, and The head part is rotatably supported on a cylindrical support part provided on the stand side, and the head part is pivoted about the support part within a space formed by the support part and the support part. It houses a swinging mechanism, and the swinging mechanism is fixed to the support section, and includes a swinging motor whose rotation axis is eccentric from the rotation axis of the support section. , a rotating arm that is fixed to the rotating shaft of the oscillating motor and whose free end side rotates with a predetermined rotation radius with respect to the rotating shaft; and a rotating arm that is swingably disposed on the upper side of the rotating arm. The pivoting center is disposed on the side opposite to the rotating shaft of the oscillating motor, sandwiching the rotational axis of the support, and the free end of the rotating arm is arranged in a long groove formed on the free end side. A first cam lever whose sides are connected to each other, and which is swingably arranged on the upper side of the first cam lever, the swing center of which is arranged concentrically with the rotation axis of the support column, and one end of which is arranged so as to be swingable. a second cam lever connected to the free end side of the first cam lever and whose other end side is connected to the side of the support column opposite to the first cam lever connection side; The distance from the center of swing of the second cam lever to the connection part with the support column is set larger than the distance from the center of swing of the second cam lever to the connection part of the first cam lever.

<Function> With the above configuration, the present invention can swing the head using the swing device housed in the space.

That is, the free end side of the rotating arm rotates at a predetermined rotation radius by driving the swing motor. The rotation of the free end side of this rotating arm causes the first cam lever connected to this rotating arm to swing. Furthermore, due to the swinging of this first cam lever, this first
The second cam lever connected to the cam lever swings, and this swing is transmitted to the support column of the head, resulting in a swinging motion.

In this case, since the oscillating motor, rotating arm, first cam lever, and second cam lever are stacked on top of each other in this order, they occupy relatively little space, making the oscillating device itself compact. It can be stored within the space.

Moreover, the first cam lever is arranged such that its swing center is located on the side opposite to the rotating shaft of the oscillating motor, sandwiching the rotational axis of the support part, and is located in a long groove formed on the free end side of the first cam lever. Since the free ends of the rotating arms are connected, a large rotation radius can be secured within the space in which the swinging device is housed. Therefore, since the torque required to swing the first cam lever is small, the swinging motion of the first cam lever can be ensured even if the rotational force of the rotating arm, that is, the rotational torque of the swing motor is not very large. Ru. Therefore, it is not necessary to use a large oscillating motor with a large torque, and a small motor can be used, making it possible to make the oscillating device compact.

The swinging motion of the first cam lever has a narrow swing range due to the large swing radius, but in the second cam lever connected to the first cam lever, the first cam lever moves from the swing center to the first cam lever. Since the distance from the center of swing of the second cam lever to the connection part with the column is set larger than the distance to the connection part of the cam lever, the swing movement of the first cam lever is amplified and the head This results in a large swinging motion being transmitted to the support column.

The compact oscillating device as described above is housed in the space formed by the support section and the support section, thereby giving the electric fan a clean appearance.

<Example> Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 is a front view of the embodiment of the present invention, and FIG. 4 is a side view (partially sectional view) of the same. This figure 3 and 4
In the figure, 10 is a stand as a support base, 1
Reference numeral 1 denotes a neck which is supported on the upper part of this stand 10 so as to be adjustable in elevation, and this neck 11 is integrally provided with a support part 12 formed in a cylindrical shape with an open top side. 14 is the head of the electric fan, and this head 14 is similar to the fan 13.
and a front guard 15 surrounding this fan 13,
It is composed of a rear guard 16 and a fan motor 17 fixed to the rear guard 16.
A support section 19 having a cylindrical shape with an open bottom side is integrally provided at the lower part of the head 14. As shown in FIG. 5, which is a sectional view of the main part, this support section 19 is fitted onto the support section 12 provided on the side of the stand 10, and this support section 12 and the support section 19, the head 14 is rotatably supported by the stand 10. In addition, in FIG. 5, 20 is a long hole provided in the support part 12, and this long hole 2
0 is the support part 12 as shown in FIGS. 6 and 7.
The pillar part 1 is formed to have a predetermined length in the circumferential direction.
A screw 21 screwed into the support portion 9 passes through the elongated hole 20 to prevent the support portion 19 from coming off from the support portion 12.

A swing mechanism 23 for swinging the head 14 supported by the support section 19 is provided in the space formed by the support section 12 and the support section 19 . As shown in FIGS. 5 and 8 to 11, this swinging mechanism 23 includes a swinging motor 22, a rotating arm 28 fixed to a rotating shaft 31 of the swinging motor 22, and a rotating arm 28 fixed to a rotating shaft 31 of the swinging motor 22. a first cam lever 29 connected to the movable arm 28;
and a second cam lever 30 connected to the cam lever 30.

The swing motor 22 is fixed to the bottom of the support section 12, and the rotation shaft 31 of the swing motor 22 is arranged eccentrically from the rotation axis of the support section 19. The rotating arm 28 is
It is fixed to the rotating shaft 31 of the oscillating motor 22 with a retaining pin 32, and a protrusion 33 that protrudes upward is provided on the free end side. It is adapted to rotate with a predetermined radius of rotation about the rotating shaft 31.

The first cam lever 29 is connected to the oscillating motor 2.
2, which is fixed to the upper surface of the rotary arm 28 and is swingably supported by a first support shaft 35 on a mounting plate 25 on which a stepped portion 26 is formed in the horizontal direction. The pivot center of this first cam lever 29, that is, the first support shaft 35
is arranged on the side opposite to the rotating shaft 31 of the oscillating motor 22, sandwiching the rotating shaft center of the support column 19. Also, on the free end side of this first cam lever 29,
A long groove 34 that opens toward the lower surface is formed, and a protrusion 33 formed on the free end side of the rotating arm 33 engages with this long groove 34, thereby connecting the two. Also, the first
A projection 36 projecting upward is integrally provided on the upper surface of the free end side of the cam lever 29.

The second cam lever 30 is fixed to the upper surface of the oscillating motor 22.
The second support shaft 37 is attached to the mounting plate 27, which has a stepped portion as a mounting surface above the first cam lever 29.
It is arranged above the first cam lever 29 by being swingably supported by the second cam lever 30. It is arranged concentrically with the axis. This second cam lever 30
An elongated hole 39 is formed on one end side and passes through a protrusion 36 formed on the free end side of the first cam lever 29. When the protrusion 36 of the first cam lever 29 passes through this elongated hole 39, the first cam lever 29 Cam lever 29
and the second cam lever 30 are connected. Further, a projection 40 projecting upward is provided on the other end side of the second cam lever 30, that is, the side opposite to the connection side of the first cam lever 29, and this projection 40 is formed on the top surface of the support column 19. By engaging with the connection hole 41, the second cam lever 30 and the support column 19 are connected to each other.
In other words, the head 14 is connected. Further, in this second cam lever 30, the second cam lever 30
The center of swing of the cam lever 30, that is, the second support shaft 3
7 to the connection part with the first cam lever 29, that is, the elongated hole 39, the second support shaft 37
The distance from the connecting portion with the support column 19, that is, the protrusion 40, is set to be large, and the swing range on the protrusion 40 side is set to be larger than the swing range on the elongated hole 39 side.

In FIGS. 3 and 4, 42 is a switch for controlling the operation and stopping of the oscillating motor. Further, in FIG. 5, numeral 38 is an E-ring for preventing the second support shaft 37 from coming off.

Further, in FIG. 6, 43 is a screw hole.

Next, the operation of the electric fan having the above configuration will be explained.

Now, when the swing switch 42 is set to operation,
The swing motor 22 is activated. This swing motor 22
When the rotating shaft 31 of the swing motor 22 rotates due to the operation, the rotating arm 28 similarly rotates, and the protrusion 33 on the free end side rotates at a predetermined rotation radius. Due to this rotation of the rotating arm 28, the first cam lever 29 swings in a relatively narrow range about the first support shaft 35 while the protrusion 33 slides within the long groove 34. This swinging motion of the first cam lever 29 is
The engagement between the protrusion 36 and the elongated hole 39 transmits the signal to the second cam lever 30 . The second cam lever 30
Due to the swinging movement of the cam lever 29, the second support shaft 3
The second cam lever 30 performs a swinging motion around the second cam lever 30, and the swinging motion of the second cam lever 30 is transmitted to the column 19, causing the column 19 and the head 14 to swing.

Now, as described above, the swinging mechanism 23 converts the rotational movement of the rotating arm 28 into the swinging movement of the first cam lever 29 and the second cam lever 30, so that the head 14
However, the first cam lever 29 has a relatively large swing radius because its swing center is located on the side facing the rotation shaft 31 of the swing motor 22 across the rotation axis of the support column 19. Since the torque required to swing the first cam lever 29 is relatively small, it is possible to use a small motor with relatively low torque as the swing motor 22. Since the swing range of the first cam lever 29 is relatively small, the second cam lever 30
The swinging motion of the first cam lever 29 can be amplified and transmitted to the support column 19 and the head 14. That is, the second cam lever 30 has a distance from the second support shaft 37 to the support column 19 with respect to the distance from the swing center, that is, the second support shaft 37, to the connection part with the first cam lever 29, that is, the elongated hole 39. Since the distance to the protrusion 40 is set large, the protrusion 40 is larger than the swing range on the long hole 39 side, that is, the swing range on the free end side of the first cam lever 29.
The swing range on the side, that is, the swing range on the side of the support column 19 and the head 14 can be set to be large.

In the case of the swinging mechanism 23, a small motor can be used as the swinging motor 22 as described above, and when viewed from above, the swinging motor 22, the rotating arm 28, the first cam lever 29, Since it is arranged in order to overlap with the second cam lever 30,
Unlike the conventional four-link mechanism, the swinging device does not occupy a large space, and the swinging mechanism 23 can be formed compactly. Therefore, when the oscillating mechanism 23 is housed in the space formed by the support section 12 and the support section 19, the support section 12 and the support section 19 can be made small, and the oscillation mechanism 23 can be made small. In addition to concealing the mechanism 23 within the space, the fan can have a clean appearance. Also, the swing mechanism 23
is housed in the space, and the stand 10 is not provided with any swing mechanism, so it is possible to make the stand 10 small, and the design of the electric fan can have a degree of freedom.

Further, if the swing center of the second cam lever 30 and the swing center of the support column 19 match as described above,
Since the rotation locus of the protrusion 40 of the second cam lever and the rotation locus of the connection hole 41 of the support column 19 match,
When assembling the electric fan, the protrusion 40 and the connection hole 41 can be easily fitted together, making assembly simple.

On the other hand, if the protrusion 40 is suspended downward from the support 19 side as shown in FIG. 12, it is relatively difficult to fit the second cam lever 30 into a disc as shown in FIG. By forming it into a shape, fitting can be easily performed.

<Effects> According to the present invention, the oscillating mechanism is compactly formed and housed in the space formed by the support part and the column, so the oscillating mechanism is not exposed to the outside and the fan It is possible to make the exterior look neat and clean. In addition, the swing mechanism is housed in the above space, and the stand is not equipped with a swing mechanism.
The stand can be designed freely, such as by making it small, and can provide a degree of freedom in design. Further, the first cam lever can secure a large rotation radius within the space in which the swinging mechanism is housed, and the torque for driving the first cam lever can be small. Since the rotational torque of the oscillating motor driven by the oscillating motor only needs to be small, it is possible to use a small motor as the oscillating motor, thereby making it possible to make the oscillating mechanism more compact. In this case, the swinging range of the first cam lever is narrower due to the larger rotation radius, but since the distance of the connection part of the second cam lever is set as described above, the first cam lever has a small swinging range. It is possible to amplify and transmit the vibration to the column, thereby making the column swing greatly, thereby making it possible to make the head swing largely. In addition, by arranging the swing center of the second cam lever concentrically with the rotation axis of the support column, the rotational loci of the connecting portions of both the second cam lever and the support column coincide, making it easy to connect when assembling the fan. Because it is easy to connect between departments,
Assembly workability can be improved.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional electric fan, Fig. 2 is a sectional view of the same essential parts, Fig. 3 is a front view of the embodiment of the present invention, and Fig. 4 is a side view of a conventional electric fan.
The figure is a side view (partial sectional view) of the same example, FIG. 5 is a sectional view of the main part of the same example, and FIG. 6 is a support part 12 used in the same example.
, FIG. 7 is a side view of the main part of the supporting part 12, FIGS. 8 to 11 are plan views of the swinging mechanism used in the same example, and FIG. 12 is a sectional view of the main part of another embodiment. FIG. 13 is a plan view of a swinging mechanism according to another embodiment of the same. 12...Support part, 13...Fan, 14...Head, 17...Fan motor, 19...Strut part, 2
2... Swing motor, 23... Swing mechanism, 28...
Rotating arm, 29...First cam lever, 30...
Second cam lever, 31...Rotary shaft of the oscillating motor;
34... Long groove.

Claims (1)

[Claims for Utility Model Registration] A cylindrical structure in which a cylindrical support section for supporting the head is provided at the bottom of a head equipped with a fan and a fan motor for rotating the fan, and this support section is provided on the stand side. The head is rotatably supported on a support part, and a swinging mechanism for swinging the head about the support part is housed in a space formed by the support part and the support part. , the swinging mechanism is fixed to the support section,
A swing motor whose rotating shaft is located eccentrically from the rotation axis of the support, and a swing motor that is fixed to the rotating shaft of the swing motor and whose free end rotates with a predetermined rotation radius with respect to the rotating shaft. a rotating arm that is swingably disposed on the upper side of the rotating arm, the center of which swinging faces the rotating shaft of the swinging motor which is sandwiched between the rotating shaft of the support section; a first cam lever disposed on the side where the rotating arm is moved, and the free end side of the rotating arm is connected to a long groove formed on the free end side; and the first cam lever is swingably disposed on the upper side of the first cam lever The rocking center is arranged concentrically with the rotation axis of the support column, one end side is connected to the free end side of the first cam lever, and the other end side faces the first cam lever connection side of the support column part. a second cam lever connected to the side; and in the second cam lever, the pivot center of the second cam lever is determined relative to the distance from the pivot center of the second cam lever to the connection part of the first cam lever. A fan with a large distance from the to the connection to the support.