JPS645109Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an electric fan equipped with an oscillating mechanism, and particularly improves the ease of assembling a cover that covers a motor for rotating blades together with an oscillating mechanism, and also improves the ease of assembling a cover that covers a motor for rotating blades together with an oscillating mechanism. This invention relates to an electric fan designed to prevent the insertion of

[Technical background of the invention]

In electric fans equipped with an oscillating mechanism, the rotation of the blade motor is generally used to drive the oscillating mechanism, and the driving and stopping of the oscillating mechanism is carried out in the first step.
This is done by pushing and pulling the plastic operating shaft 2 of the swinging mechanism 1 shown in the figure through a knob 3 connected thereto to connect and disconnect between the motor 4 and the swinging mechanism 1. ing. In this type of electric fan, the cover 5 that covers the motor 4 together with the swinging mechanism 1 is formed with an insertion hole 6 through which the knob 3 is inserted. If you insert your finger into the cover 5 through the insertion hole 6, there is a risk of touching the terminal 7 of the motor 4 and causing an electric shock.
If you accidentally insert your finger into the insertion hole 6 with the knob 3 removed, the flexible operating shaft 2 will bend and your finger will fall into the cover 5. However, the tip of the operating shaft 2 comes into contact with the inner peripheral edge of the insertion hole 6, preventing the finger from entering the cover 5 any further.

[Problems with background technology]

However, since the cover 5 has a cylindrical shape with the front side open, the cover 5 must be inserted axially from the rear of the motor 4 during assembly. Since the front end of the cover 5 touches the tip of the operating shaft 2, the cover 5 must be inserted diagonally or parallel to the axis of the motor 4 while changing its direction in a complicated manner, which makes the assembly work difficult. This is extremely troublesome, and this poses problems, such as making it difficult to automate the assembly.

[Purpose of invention]

An object of the present invention is to provide an electric fan that can prevent fingers from being inserted into the cover through the insertion hole of the knob, and also allows easy assembly of the cover.

[Summary of the invention] The present invention is designed so that when the operating shaft is pushed in, the tip of the operating shaft is located inward from the inner surface of the cover, and the end of the operating shaft is positioned inwardly from the inner surface of the cover, and the end of the operating shaft is mounted so that it can be moved in the axial direction. The member is provided with a substantially cylindrical surrounding wall surrounding the operating shaft, so that even if the cover is inserted in the axial direction of the motor, that is, straight, it will not hit the operating shaft. This is intended to prevent fingers from being inserted inside.

[Example of idea]

The following is an example of the present invention shown in Figures 2 to 4.
This will be explained with reference to the figures. First, in Figure 2, 1
1 is the base of the electric fan, 12 is a post installed on the base 11, 13 is a neck piece provided at the upper end of the post 12, and 14 is a stand 1 attached to the neck piece 13.
5, the head is swingably supported; 16 is a blower blade provided on the front surface of the head 14;
is a guard that covers the blade 16. The head 14 has a motor 18 that rotationally drives the blades 16 and a swinging mechanism 19 that operates using the rotation of the motor 18.
etc., and these are covered by a cylindrical cover 2 with an open front.
Covered by 0. Reference numeral 21 denotes a swinging knob connected to the swinging mechanism 19. The knob 21 and the swinging mechanism 19 will be explained below with reference to FIG. 3. 22 is the case 23 of the motor 18
This is a gearbox provided at the rear end, and its top opening is closed by a lid 24. A worm (not shown) is formed at the rear end of the rotating shaft 25 of the motor 18 that can protrude into the gear box 22. Reference numeral 26 designates a pinion shaft as an operating shaft, which is made of plastic and is inserted into and supported by the gear box 22 and the lid 24 so as to be able to move up and down.Although not shown, the pinion shaft 26 has a pinion shaft that is always in mesh with the worm. A worm wheel is supported. A clutch mechanism is provided between the pinion shaft 26 and the worm wheel, and when the pinion shaft 26 is pushed down, it is connected to the worm wheel by the clutch mechanism, and when it is pulled up, the connection is released. ing. Further, a pinion 26a is formed at the lower end of the pinion shaft 26.
The gear a meshes with a crank gear 27 of the swing mechanism 19 rotatably supported on the lower surface of the gear box 22. Reference numeral 28 denotes a link whose one end is connected to the crank gear 27, and whose other end (not shown) is connected to the neck piece 13. Therefore, by pushing and pulling the pinion shaft 26, the motor 18 and the swinging mechanism 19 are connected and disconnected, and when the knob 21 is pushed in as shown in FIG. The rotation of the motor 18 is further transmitted from the pinion 26 to the crank gear 27, giving circular motion to one end of the link 28, and based on this, the link 28 reciprocates around the other end attached to the neck piece 13. Due to the rocking movement, the head 14 eventually moves in response to this.
The whole thing is a oscillating motion. On the other hand, a large diameter portion 26b and a small diameter portion 26c are formed at the upper end of the pinion shaft 26, and the length of the pinion shaft 26 is set to a predetermined dimension and the pinion shaft 26 is pushed in. At this time, the upper end of the large diameter portion 26b is positioned within the cover 20. Reference numeral 29 denotes an insertion hole for the knob 21 provided in the cover 20 in correspondence with the pinion shaft 26, and the inner diameter thereof is set larger than that of the knob 21. The knob 21 has a hollow shape, and a small diameter hole 21a that can be expanded or contracted by a slotted groove (not shown) or the like is formed in the lower end of the knob 21.
Such a knob 21 connects the small diameter hole 21a to the small diameter portion 26.
It is removably connected to the pinion shaft 26 by press-fitting into the pinion shaft 26. In addition, 30 is the pick 20
This is a tightening spring wound around the outer periphery of the small diameter portion 21a. Reference numeral 31 designates a cylindrical surrounding wall portion formed to have approximately the same diameter as the insertion hole 29 of the cover 20, and this is a member to which the pinion shaft 26 is attached so as to be movable in the axial direction, that is, movable in the vertical direction, for example. It is integrally erected on the cover 24 so as to surround the pinion shaft 26, and its upper end extends close to the insertion hole 29, so that a finger can be inserted into the cover 20 through a gap 32 between the cover 20 and the inner surface of the cover 20. I try not to. In addition, 33 is a boss portion protruding from the rear end of the gearbox 22, 34 is a mounting portion protruding from inside the rear end of the cover 20, and 35 is inserted through this mounting portion 34 and screwed onto the boss portion 33. These are the mounting screws.
Reference numeral 36 indicates an output wire of the stator coil 37 of the motor 18 and a switch 38 provided on the base 11.
This is a terminal for connecting a lead wire (none of which is shown) from the terminal.

Next, the operation of the above configuration will be explained. First, the cover 20 is attached in a process prior to attaching the knob 21, and the cover 20 is inserted from the rear of the motor 18 while the pinion shaft 26 is pushed in, as shown in FIG. pinion shaft 26
When the cover 20 is pushed in, not only the surrounding wall 31 but also the pinion shaft 26 are located inside the cover 20.
Even if the cover 20 is moved in a straight line parallel to the axis of the motor 18, the cover 20 does not come into contact with the surrounding wall 31 or the pinion shaft 26, and can be easily inserted to the correct position. After inserting the cover to its proper position, the mounting screw 35 is inserted into the mounting portion 34 and screwed onto the boss portion 33.
Fix 0. In this way, the cover 20 can be attached simply by moving in a straight line, so the assembly work is easy and the assembly can be automated. On the other hand, if the knob 21 is not yet attached with the cover 20 attached, or if the knob 21 is removed during use at home or the like, a finger may be accidentally inserted into the insertion hole 29. However, the surrounding wall 3 is located near the insertion hole 29.
1 exists, the finger can be inserted directly into the surrounding wall 31 through the insertion hole 29, and there is no risk of the finger entering the cover 20. Therefore, there is no risk of fingers touching the terminals 36 of the motor 18, etc.

Note that the present invention is not limited to the embodiments described above and shown in the drawings, and the upper part of the surrounding wall part 39 may be formed into a substantially cylindrical shape with a large number of protrusions 40, as shown in FIG. Although not shown, the surrounding wall portion may be constructed as a separate part from the lid, and various modifications may be made without departing from the spirit of the invention.

[Effect of idea]

As is clear from the above description, the present invention eliminates the risk of your finger touching live parts such as motor terminals even if you accidentally insert your finger into the insertion hole of the cover when the knob is removed. Also, when installing the cover, simply moving the cover in a straight line allows it to be inserted into the correct position, improving assembly work efficiency.
It has excellent effects such as easily automating assembly.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing the swinging mechanism of a conventional electric fan, and FIGS. 2 to 4 show an embodiment of the present invention. FIG. The figure is a vertical side view of the main part, FIG. 4 is an exploded vertical side view of the main part for explaining the order of assembling the cover, and FIG. 5 is a perspective view showing another embodiment of the surrounding wall part. . In the figure, 18 is a motor, 19 is a swing mechanism, 20
21 is a cover, 21 is a knob, 24 is a lid (a member for pivotally supporting an operating shaft), 26 is a pinion shaft (operating shaft), 29 is an insertion hole, and 31 and 39 are surrounding walls.

Claims (1)

[Scope of utility model registration request] A swinging mechanism driven by a motor for rotating the blade is provided, and the swinging mechanism and the motor are connected and disconnected by pushing and pulling an operating shaft through a knob that is detachably connected to the swinging mechanism. In the configuration, the length of the operating shaft is determined such that when the operating shaft is pushed in, the tip is located inward from the inner surface of the cylindrical cover that covers the swinging mechanism together with the motor, and the operating shaft is An electric fan, characterized in that a substantially cylindrical surrounding wall surrounding the operating shaft is erected on the side member to which the member is attached so as to be movable in a direction and extends up to near the insertion hole of the knob formed in the cover.