JPS62228697A - Free oscillating device for electric fan - Google Patents

Abstract

PURPOSE:To enable economical manufacture of a titled device, by a method wherein a neck piece and a brake mechanism for the pipe of a base are vertically mounted, and even if the outer size of the neck piece is small, constitution is practicable, plural grooves in a complicated shape are formed in the end surface of the pipe, and the device is molded by means of synthetic resin. CONSTITUTION:A pipe 1 of a base is designed to have an outer size matching a size being large enough to allow insertion of it into a pipe insertion hole 5 of a neck piece 4. Plural grooves 2 are formed at a specified distance in the surface of the upper end part of the pipe 1, and an oblong hole 3 is provided in an outer periphery. Meanwhile, the neck piece 4 has a hole 6, the outer diameter of which makes contact with the inner diameter of the bottom of the pipe insertion hole 5, a spring 8 and a ball 7 are placed therein, the upper end of the pipe 1 is inserted, and the tip of a screw 10 is inserted through a hole 9 in an outer side into an oblong hole 3 in the outer periphery of the pipe 1 to lock the screw to the pipe 1. This constitution enables a mechanism to be contained even if a space between the outer dia of the neck piece 4 and the outer diameter of the pipe 1 is narrow, and enabled economical manufacture of a device by means of synthetic resin since the grooves 2 in a complicated shape are formed in the end surface of the pipe 1.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a free swing device for an electric fan.

BACKGROUND OF THE INVENTION Conventionally, this type of free swing device has been constructed as shown in FIGS. 4 and 5. That is, the neck piece 104 that supports the motor 100 in an upwardly and upwardly movable manner has an insertion hole 10 at the lower end.
6, and is rotatably fitted into the tip of the pipe 101 standing upright on the base 120. A slot 103 and a plurality of holes 102 are provided at certain intervals in the circumferential direction of the portion of the pipe 101 that fits into the neck piece 104.

On the other hand, a screw 10 is inserted into the insertion hole 105 of the neck piece 104.
The tip of B engages with the protruding hole 103, and the ball 109 is pressed against the hole 102 by a screw 111 and a spring 110.

With the above configuration, when the motor 100 is pushed, the direction changes horizontally within the range of the slot 103, and at this time, the hole 102 and the ball 109 determine the stop position in stages.

Problems to be Solved by the Invention In such a conventional configuration, when the outer diameter of the neck piece 104 is small or when the outer diameter of the pipe 101 is large, the ball 109° spring 11 is attached to the neck piece 104.
0. There is no space to provide the screw 111, and the conventional pipe 101 is a metal tube, so the hole 1 is removed by post-processing.
There were design constraints and economical problems, such as an increase in the number of processing steps due to the provision of the slots 02 and slots 103.

SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and it is an object of the present invention to provide an electric fan in which the direction adjustment function of the motor can be manufactured economically.

Means for Solving the Problem In order to solve this problem, the present invention comprises a pipe installed upright on a base, and a neck piece part that supports an air blowing part and is fitted into the pipe. A plurality of recesses are formed on the upper end surface, and a ball head facing the recesses and a spring for biasing the ball head are provided on the top surface of the pipe insertion portion of the neck piece.

With this configuration, the spring and ball are located above the pipe, so the mechanism can be accommodated even if there is little space between the outside diameter of the neckpiece and the outside diameter of the pipe, and the complex multiple recesses are formed on the pipe end surface. Since it is provided in the center, molding with synthetic resin or the like becomes easy.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1, 2, and 3. A synthetic resin pipe 1 is mounted upright on the base 120 so as to be able to slide up and down, and the tip of this pipe 1 can be inserted into the pipe insertion hole 5 of the neck piece 4 that supports the motor 100 in a vertically movable manner. The outer diameter is adjusted to fit the dimensions. A plurality of grooves 2 are provided at regular intervals on the end surface of the upper end of the pipe 1, and a horizontal elongated hole 3 with a certain length is provided on the outer periphery. On the other hand, the neck piece 4 has a hole 6 whose outer diameter is in contact with the inner diameter of the pipe insertion hole 5, and the spring 8
and the ball 7, insert the upper end of the pipe 1, and insert the tip of the screw 10 from the outer side hole 9 into the long hole 3 on the outer circumference of the pipe 1 to lock it with the pipe 1.

Then, the ball 7 pushed by the spring 8 is pressed against the groove 2 of the pipe 1, stopping the neck piece 4 at that position, and even if the fan blows air, the reaction force causes the neck piece 4 to rotate horizontally. to prevent neckpiece 4 from hitting ball 7.
When the motor 100 is turned with a force greater than the pressing force of , the horizontal direction of the motor 100 can be changed in increments that match the spacing of the grooves 2.

In order to prevent the ball 7 and spring 8 from falling out of the hole 6 during assembly, a claw 1 is attached to the spring 8.
1 and inserting it into the hole 12, which is provided on the top surface of the hole 6 so as to have a smaller diameter, is reliable and improves workability.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, the braking mechanism for the neckpiece and the pipe is provided in the vertical direction, so even if the outer diameter of the neckpiece is small, the structure can be In addition, since multiple grooves with complex shapes are provided on the end surface of the pipe, it is also possible to mold the pipe material from synthetic resin, reducing restrictions on mechanical design, and reducing the number of structural materials. By expanding the selection range, it is possible to produce better functions at a lower cost.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a free swing device for an electric fan according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the same essential parts, and FIG. 3 is a free swing device for a fan according to another embodiment of the present invention. An enlarged cross-sectional view of the main parts, FIG. 4 is an exploded perspective view showing a free swing device of a conventional electric fan,
FIG. 5 is an enlarged sectional view of the same main part. 1...Pipe, 2...Recess, 4...
...Neckpiece part, 5...Insertion part, 7...
... Ball head, 8... Spring. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 1・-1 White 71 2-1-↓ -4tJL , 3 (L・-zumoji 4-11han,)ko0-人9-～-Bon (o・-wabir-)

Claims (1)

[Claims] It consists of a base pipe and a neck piece part that supports the air blower and fits into the pipe, and the neck piece part has a ball head and a spring facing a plurality of recesses provided on the circumference of the upper end surface of the pipe. A free swing device for an electric fan configured to be housed in a top surface of the pipe insertion portion.