JPH058643Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention is applicable to, for example, aperture control and shutter control of cameras, tape rotation direction control, start and stop control in audio equipment, video decks, etc.
The present invention relates to a coupling structure between a bobbin and a yoke in a small plunger used in home appliances and other devices requiring a power source, and having a structure in which a portion of the yoke is inserted through the bobbin.

(Prior Art) In conventional small-sized plungers, in order to fix the yoke to the bobbin so that it cannot be removed, an adhesive is applied between the two, and the adhesive is cured and fixed.

(Problem to be solved by new invention) However, when the yoke and bobbin are bonded with adhesive as in the past, there is a problem that the yoke may come off from the bobbin due to variations in the amount of adhesive or the location where it is applied, causing a malfunction. It was hot. In addition, in order to reduce the above-mentioned variations, if an adhesive with high fluidity is used, the adhesive will flow out to the suction surface of the movable piece of the yoke through the gap between the yoke and the yoke insertion tube of the bobbin. There was a problem that it caused defects.

In addition, when using adhesive, it requires time to dry the adhesive and heat installation (for example, 30°C at 80°C).
Heat for a minute. ) Moreover, there were problems in that inspection and other work could not be performed immediately after bonding with adhesive, which was inefficient and increased material and equipment costs.

The present invention solves the above-mentioned problems and provides a structure for connecting the bobbin and yoke of a small plunger, which allows the bobbin and yoke to be reliably connected, and achieves economicalization and improvement in manufacturing work efficiency. The purpose is to

(Means for Solving the Problems) In order to achieve this object, the present invention provides a notch in the base to which the yoke is fixed, a protrusion in the flange of the bobbin, and the yoke is inserted into the bobbin. , and the yoke is coupled to the bobbin by fitting the protrusion into the notch.

(Example) The drawings are diagrams showing an example of the present invention. 1st
The figure is a side view showing the state in which the yoke 1 is coupled to the bobbin 2. The yoke 1 is divided into two symmetrical divided yokes 1a and 1b as shown in the plan view of Fig. 2.
are integrated as shown in the side view of FIG. 4 by welding a plate-shaped pedestal 4 having the shape shown in the plan view of FIG. Form into a U-shape. As shown in FIGS. 2 and 3, mounting holes 6 are provided in the same locations in the split yokes 1a, 1b and the pedestal 4, and a permanent magnet 7 is fixed between the split yokes 1a, 1b. As shown in FIG. 3, cutouts 8 are provided on the left and right sides of the base 4.

On the other hand, the bobbin 2 on which the winding wire 9 is wound is, as shown in FIG.
2b, each divided yoke 1a, 1b and two arm portions 10 of a movable piece 10 made of a magnetic material shown in FIG.
a and 10a are inserted from opposite sides.

On one of the collars 11 of the split bobbins 2a and 2b, there is a mark 5, which is a view in the direction of arrow A in FIGS. 2, 4, and 2.
As shown in the figure, a portion where the terminal pin 12 is provided or a part of the upper surface is formed as a wide portion 11a, and a protrusion 13 that fits into the notch 8 is formed at the lower end of the wide portion 11a. .

Yoke 1 and bobbin 2 configured in this way
As shown in FIG. 1, the split bobbins 2a, 2b
By pushing the divided yokes 1a and 1b into the respective parts, the inclined surfaces a of the protrusions 13 of the divided bobbins 2a and 2b elastically ride on the ends of the pedestal 4 due to the elasticity of the bobbin 2, and by further pushing the protrusions 13 is elastically fitted into the notch 8 and is prevented from coming off.

(Effect of the invention) The coupling structure between the bobbin and the yoke according to the invention is as follows:
In addition to providing a notch in the pedestal to which the yoke is fixed,
The structure is such that the yoke is coupled to the bobbin by providing a protrusion on the flange of the bobbin, inserting the yoke into the bobbin, and fitting the protrusion into the notch. The bonding can be performed reliably, and there is no bonding failure that occurs when adhesives are used, resulting in stable quality and improved yield.

In addition, the number of man-hours required for bonding work is reduced, and the waiting time required when using an adhesive is not required, so that the plunger can be manufactured efficiently.

Further, since no adhesive is required and no heating device is required, economy can be achieved and the price of the plunger can be reduced.

[Brief explanation of drawings]

FIG. 1 is a side view showing the coupling structure of the bobbin and yoke according to the present invention, and FIG. 2 shows the bobbin of the embodiment,
FIG. 3 is an exploded plan view showing the yoke and the movable piece, FIG. 3 is a plan view of the pedestal of this embodiment, FIG. 4 is an exploded side view of the bobbin and yoke of this embodiment, and FIG. 5 is A of FIG. 2.
It is an arrow view.

Claims (1)

[Scope of utility model registration request] A notch is provided in the pedestal to which the yoke is fixed, a protrusion is provided in the flange of the bobbin, the yoke is inserted into the bobbin, and the protrusion is fitted into the notch, thereby attaching the yoke to the bobbin. A combination structure of the bobbin and yoke of a small plunger, which is characterized by being combined.