JPS647273Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improved structure for supporting a neck piece on an electric fan stand.

For example, as a technology that precedes this proposal,
There is one shown in Publication No. 38868. In the bulletin,
Opposed grooves are formed on the inner surface of the slot at the upper end of the synthetic resin stand, into which a metal fitting having a U-shaped cross section is fitted, and communication holes are drilled between both arms of the slot and the metal fitting. A pivot shaft and a tightening screw for rotatably supporting the fan neck piece support arm are respectively inserted through and screwed together, and an elastic washer is inserted between the metal fitting and the neck piece support arm. discloses a fan stand characterized in that a fan neck piece is elastically supported via a metal fitting and an elastic washer by tightening the tightening screw.

However, since elastic force is imparted to the elastic washer by tightening the tightening screw, the elastic force changes depending on the tightening force of the tightening screw, and the elevation angle adjustment is performed steplessly and without resistance. Therefore, it was difficult to confirm the positioning of the operation.

In view of the above points, it is an object of the present invention to provide an electric fan having a simple structure, high assembly efficiency, constant frictional force, and crisp operability.

That is, in the present invention, a forked part is formed at the tip of a prop of a synthetic resin stand, the fan head is pivotally supported on the forked part via a neck piece, and a support plate is secured to the forked part. A brake plate interposed between the neck piece and the forked portion and latched to the neck piece is rotatably and integrally fixed to the support plate, and at least the brake plate is disposed between the brake plate and the support plate. It has a structure in which a locking part is formed to temporarily prevent the plate from rotating in one direction.

The present invention will be explained below based on the embodiments shown in FIGS. 1 to 11.

The fan 1 of this invention includes a stand 4 made of synthetic resin, which is made up of a base 2 that is attached to a room wall, etc., a support 3 that protrudes from the base 2, and a stand 4 made of synthetic resin that is formed at the tip of the support 3 of the stand 4. A neck piece 6 that is pivoted to the back part 5;
The fan head 7 is rotatably supported by the neck piece 6. The head 7 consists of a motor, a motor cover, blades 8, and front and rear guards 9. Various synthetic resins can be used to mold the stand 4, such as ABS resin and PP resin. The neck piece 6 is pivotally supported to the two-pronged portion 5 by a pivot bolt 10 that penetrates from one outer side of the two-pronged portion 5 to the other outer side, and the bolt 10 is prevented from coming off by screwing into the exposed portion of the bolt tip. It will be held at Natsuto 11. The bolt 10
Alternatively, the nut 11 is prevented from rotating by making the bolt head or nut 11 polygonal and positioning the head or nut 11 in a polygonal recess 12 formed on the outer surface of the fork 5.

A support plate 13 made of sheet metal and a brake plate 14 attached to the support plate 13 are interposed between the forked portion 5 and the neck piece 6. The support plate 13 is formed into a substantially L-shape that abuts the inner surface and bottom surface of the fork 5, and prevents the fork 5 from rotating.
A cylindrical portion 15 through which the pivot bolt 10 passes is formed at the center of the support plate 13.

The brake plate 14 is formed into an annular shape, and a central through hole 16 is fitted into the cylindrical portion 15 to allow automatic rotation. The brake plate 14 is prevented from coming off from the cylindrical portion 15 by caulking the ends of the cylindrical portion so as to expand outward. A ring 18 is interposed between the expansion caulking portion 17 and the brake plate 14 in order to prevent the caulking portion 17 from biting into the brake plate 14 during caulking and preventing rotation of the brake plate 14. There is. Moreover, the brake plate 14 is brought into pressure contact with the support plate 13 at the same time as the cylindrical portion 15 is caulked. Therefore, although the brake plate 14 can rotate relative to the support plate 13, a frictional force is generated between the brake plate 14 and the support plate 13. The frictional force can be adjusted as appropriate by the amount of caulking when the cylindrical portion 15 is caulked. Further, the support plate 13
A locking portion is formed on the facing portion of the outer periphery of the brake plate 14. The locking portion includes a plurality of groups of protrusions 19, 20, 21 protruding from the support plate 13, and a plurality of protrusions 22, 23, 2 protruding from the brake plate 14.
4 and more. A protrusion 1 protruding from the support plate 13
The opening angle between each protrusion in groups 9, 20, and 21 is A
The starting points of each group are set at 0 degrees, A/3 degrees, 2A/3 degrees from the position of the opening angle of 120 degrees, and a plurality of protrusions 19, 20,
21 is formed. The protrusions 22, 23, and 24 protruding from the brake plate 14 are formed with an opening angle of 120 degrees. When the support plate 13 and the brake plate 14 are brought into contact, the protrusions 19, 2
0 and 21 are the protrusions 22 and 21 on the brake plate 14, respectively.
23 and 24 come into contact with the support plate 13, the outer peripheral part of the brake plate 14 is lifted from the support plate 13, and the brake plate 14 becomes shade-shaped.
The pressing force of the brake plate 14 against the support plate 13 is improved. A bent piece 2 is provided on the outer periphery of the brake plate 14.
5, 25 are formed, and the bent pieces 25, 25
is a locking portion 26 formed on the neck piece 6,
26. Therefore, the brake plate 14 rotates integrally with the neck piece 6, and the above-mentioned frictional force is applied to the elevation angle adjustment position as appropriate to prevent the neck piece 6 from rotating inadvertently due to the weight of the head 7. It is something to keep. Further, due to the rotation of the brake plate 14, the protrusions 22, 23, 24
By getting over the protrusions 19, 20, 21 of the support plate 13, the user can experience the rotating operation state and improve the usability. It takes strength to overcome
This force, together with the frictional force, serves as a regulating force that prevents the brake plate 14 from rotating. The regulating force by the protrusions 22, 23, 24 and the protrusions 19, 20, 21 is
The width between 0, 20, 21, and 21 is the brake plate 1.
4, the protrusions 19, 20, 21 of the support plate 13 only restrict in one direction.

In this embodiment, the protrusions 19, 1 of the support plate 13
The opening angle between 9, 20, 20, 21, and 21 is A degree, and the starting point of each group is A/3 degrees, which is located 120 degrees apart.
Since the opening angles are regulated by 2A/3 degrees, the opening angle relative to the brake plate 14 is regulated by A/3 degrees. By forming the protrusions 19, 20, 21 in groups on the support plate 13 as in this embodiment, molding can be performed more easily than when protrusions are formed at A/3 degrees each, and the support plate 13 The strength of the material is also improved.

Furthermore, since the protrusions 19, 20, 21 formed on the support plate 13 of this embodiment have an opening width of A/3 degrees, the protrusions 19, 19, 21 have an opening width of A/3 degrees.
The opening width between 0, 20, 21, and 21 is A/3 degrees. Projections 22, 23, 24 of the brake plate 14
itself has an opening width of A/3 degrees. Therefore, as shown in FIG.
9, 20, and 21, an unlatched state in which it rides over and a locked state in which it abuts occurs between any of the protrusions, and the brake plate 14 rotates at an interval of A/6 degrees. Do this.

Note that the present invention is not limited to the above-mentioned implementation structure, and the protrusions may be formed at equal intervals over the entire circumference of the support plate 13, or the protrusions may be formed in three groups. However, it is set 180 degrees apart2
It may be a group, or it may be four groups shifted by 90 degrees. If it is divided into four groups and each group is shifted by A/4 degrees, it will be possible to rotate each group by A/8 degrees, and locking rotation that is close to stepless rotation will be possible.
Furthermore, it is clear that the support plate 13 and the brake plate 14 may be provided with a locking portion including a locking hole and a protrusion as an implementation structure.

In this embodiment, in order to reduce the frictional force between the support plate 13 and the brake plate 14 and obtain a stable frictional force even during long-term use, the rotational force of the neck piece 6 due to the weight of the head 7 is reduced. A coil spring 27 for this purpose is housed in a recess 28 of the neck piece 6. One end of the coil spring 27 is locked to the neck piece 6 side, and the other end is locked to the pillar 3 side. Therefore, the coil spring 27
is biased in the downward direction.

As described above, the present invention involves forming a forked part at the tip of a prop of a synthetic resin stand, pivoting the fan head to the forked part via a neck piece, and supporting the forked part to which the forked part is locked. A plate is interposed between the neck piece and the two prongs, a brake plate that is locked to the neck piece is rotatably and integrally pressed and locked to the support plate, and at least Since a locking part is formed to temporarily prevent the brake plate from rotating in one direction, the structure is simple and easy to assemble, and the operation can be performed by confirming the position, which has great practical effects. .

[Brief explanation of the drawing]

Figure 1 is a perspective view of the proposed electric fan, Figure 2 is a survey view of the same, Figure 3 is a sectional view of the main part, Figure 4 is a perspective view of the support plate and brake plate disassembled, and Figure 5 is the assembled fan. Figure 6 is a perspective view of the neck piece, Figure 7 is a front view of the support plate, Figure 8 is a cross-sectional view of Figure 7, Figure 9 is a front view of the brake plate, and Figure 10. 9 is a cross-sectional view taken from FIG. 9, and FIG. 11 is a front view of the brake plate assembled to the support plate. 3... Support, 4... Stand, 5... Fork,
6...Network piece, 13...Support plate, 14...
Brake plate, 19, 20, 21...protrusion, 22,
23, 24...protrusion.

Claims (1)

[Claims for Utility Model Registration] (1) A forked part is formed at the tip of a prop of a synthetic resin stand, the head of the fan is pivoted to the forked part via a neck piece, and A support plate to be locked is interposed between the neck piece and the forked portion, a brake plate to be locked to the neck piece is rotatably and integrally pressed and locked to the support plate, and the brake plate and the support plate are An electric fan comprising a locking portion for temporarily blocking rotation of the brake plate in one direction at least between the brake plates. (2) The electric fan according to claim 1, wherein the locking portion is formed by a protrusion formed on the brake plate and a plurality of protrusions formed on the support plate. (3) Form three protrusions on the brake plate with an opening angle of 120 degrees, and form multiple protrusions on the support plate with a small opening angle starting from the position of the opening angle of 120 degrees. 2. The electric fan according to claim 1, wherein the electric fan is provided with a locking portion to form a locking portion. (4) Utility model registration claim 3 in which the starting points at each 120 degree position of the protrusions formed on the support plate are shifted by 1/3 degree of the small opening angle between the protrusions.
The electric fan mentioned in section. (5) The electric fan according to claim 1, wherein the locking portion is formed by forming a recess on one of the brake plate and the support plate and a protrusion on the other.