JPS5847640Y2 - Coil bobbin for image pickup tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coil bobbin for an image pickup tube to which a deflection coil for an image pickup tube is mounted and fixed.

As shown in FIG. 1, a conventional coil bobbin for an image pickup tube has a hollow cylindrical coil bobbin 1 with a cylindrical portion 1A having a diameter of 180 mm.
A pair of separators 2 are formed apart from each other in the axial direction, and when the deflection coils (horizontal deflection coil and vertical deflection coil) are attached to the coil bobbin 1, the first coil pair 3, 3 is connected to the separator 2. are separated from each other and attached to the outer surface of the cylindrical portion 1A, and on the outer periphery of the first pair of coils 3, 3,
A second coil pair (not shown) was installed with its center shifted by 90 degrees with respect to the first coil pair 3.3.

However, in such a configuration, the coil bobbin 1
There is no mechanism provided for holding and fixing the deflection coils (the first coil pair 3, 3 and the second coil pair), and when the deflection coil is held and fixed on the coil bobbin 1, This was done using adhesive tape for each coil pair.

Therefore, it takes a lot of effort to hold and fix both coil pairs in a predetermined position on the coil bobbin (applying adhesive tape), which results in extremely low work efficiency and poor mass productivity. resulting in an increase in costs,
It had the following drawbacks.

The present invention relates to a coil bobbin for an image pickup tube aimed at eliminating the above-mentioned drawbacks, and particularly relates to a coil bobbin for an image pickup tube provided with a mechanism for holding and fixing a deflection coil.

Hereinafter, one embodiment of the present invention will be described in detail using the drawings.

In FIG. 2, the image pickup tube coil bobbin 11 has a hollow cylindrical shape with a space 12 for housing the image pickup tube inside, and a cylindrical portion 14 partitioned on the front side by a collar 13.
A pair of separators 15 (the other separator is located on the opposite side in FIG. 2) are scattered in the axial direction of the cylindrical portion 14 on the outer surface of the cylindrical portion 14 at positions approximately 180° apart, or Formed in a continuous ridge shape.

Moreover, a pair of abbreviated protrusions 16 are provided at approximately the center (with respect to the circumferential direction and the axial direction) between the separators 15 on the outer surface of the cylindrical portion 14, either integrally with the cylindrical portion 14 or attached to the cylindrical portion 14. It is fixed to a separate body by adhesion, welding, etc., and is erected.

The abbreviated protrusion 16 is a leg portion 16 formed in a radial direction (perpendicular in this embodiment) to the outer surface of the cylindrical portion 14.
A, and an end portion 16B extending from the tip of the leg portion 16A toward the rear along the axial direction in parallel with the outer surface of the cylindrical portion 14, and between the inner surface of the end portion 16B and the outer surface of the cylindrical portion 14. A gap is formed in the gap having a size that substantially matches the thickness of the connecting wire portion of the first coil pair, which will be described later.

Then, from the outer surface of the cylindrical portion 14, the end 1 of the abbreviated protrusion 16 is
The height to the outer surface of 6B is set higher than the height of separator 15.

Further, near the rear end of the outer surface of the cylindrical portion 14, an abbreviated protrusion 1 is provided.
6 in positional correspondence (on the axial extension).
A C locking protrusion 17 is provided for locking the rear end portion of the coil pair.

A case in which image pickup tube deflection coils (horizontal deflection coils and perpendicular deflection coils) are attached and fixed to the image pickup tube coil bobbin 11 having such a configuration will be described below.

2 and 3, one first coil pair (horizontal deflection coil) 18 wound in a saddle shape is attached to the outer periphery of the cylindrical portion 14 of the image pickup tube coil bobbin 11, and the side end portion 18A is connected to a separator 15. be attached separately from each other.

At this time, the abbreviated protruding piece 16 of the cylindrical portion 14 mainly has an end portion 16B protruding outward through a window portion 19 formed at the center of the first coil pair 18. Coil pair 18 is
The rear crossover portion 2 fits into the gap formed between the inner surface of the end 16B of the abbreviated protrusion 16 and the outer surface of the cylindrical portion 1, and the inner surface of the end 16B is inserted into the outer surface of the rear crossover portion 20. It is mounted and fixed at a predetermined position between the collar 13 and the locking protrusion 17 on the outer periphery of the cylindrical portion 14 while a part (tip) of the cylindrical portion 14 is in contact with the cylindrical portion 14 .

Here, if a spring force is applied to the end 16B of the abbreviated protrusion 16, the end 16B will not be affected by the locking protrusion 17, as shown in FIG. Part 16
By displacing B), the first coil pair 18 can be installed smoothly, and the contact force (pressing force) of the first coil pair 18 against the rear crossover wire portion 20 is also reliable and strong. It is.

In addition, it is better to make the axial dimension of the abbreviated protrusion 16 as long as possible within a range that does not hinder the installation of the first coil pair 18, so that the inner surface of the end portion 16B with respect to the rear crossover wire portion 20 is It is effective because the contact dimension becomes longer, and the maximum
The length can be set to be the same as the axial dimension of the window portion 19 of the coil pair 18.

When the first coil pair 18 is installed and fixed at a predetermined position on the outer periphery of the cylindrical part 14, two coils are wound around the outer periphery of the first coil pair 18 in a saddle shape like the first coil pair 18. The second coil pairs (vertical deflection coils) 21 are mounted at positions offset by approximately 90 degrees with respect to the first coil pair 18.

In this case, the second coil pair 21 is the first coil pair 18
End portion 16B of the abbreviated protrusion 16 protruding from the window portion 19 of
Each side end portion 21A is in contact with the side surface of the holder, and is mounted in a predetermined position while being separated from each other.

In one embodiment of the coil bobbin for an image pickup tube according to the present invention, locking protrusions 17 are scattered in the circumferential direction near the rear end of the outer surface of the cylindrical portion 14 in order to lock the rear end of the first coil pair 18. Although the locking protrusions 17 have been described above, the locking projections 17 may be continuous in the circumferential direction and formed in the shape of a flange.

Furthermore, if the axial dimension of the window portion 19 of the first coil pair 18 is extremely large, as shown in FIG. coil pair 18
A hook portion 16C for locking the rear end is provided, and the locking protrusion 1
7 may be omitted, and in this case, the first coil pair 18 can be held and fixed more effectively with a simple configuration.

Further, in one embodiment of the present invention, the abbreviated protrusion 16
in the circumferential direction between the separators 15 on the outer surface of the cylindrical portion 14.
Although the installation position of the locking protrusion 17, that is, the installation position of the separator 15 has been described, as shown in FIG. An abbreviated protrusion 16 may be provided in place of the locking protrusion 17 at approximately the center only in the circumferential direction between them. The extension position corresponding to the locking protrusion 17) may be removed to create a gap, and the abbreviated protrusion 16 may be provided in the gap, and the inner surface of the end 16B of the abbreviated protrusion 16 is Outer surface of crossover wire of first coil pair 18 (regardless of front or rear)
The installation position of the abbreviated protrusion 16 is not limited to the embodiment as long as it comes into contact with the abbreviated protrusion 16.

In one embodiment of the present invention, the abbreviated protrusion 1
6 has been described in which the leg portion 16A is formed perpendicularly to the outer surface of the cylindrical portion 14, but as shown in FIG. In this case, a stronger spring force can be applied to the end portion 16B of the abbreviated protrusion 16, and the first coil pair 18 is strongly held and fixed.

As described above, according to the coil bobbin for an image pickup tube of the present invention, a pair of separators formed by separating the first coil pair are provided on the outer surface of the cylindrical portion, and further, the separators are located approximately in the center between the separators, and the separators are located at the ends. A pair of abbreviated protrusions are provided, the inner surface of which is in contact with the outer surface of the crossover portion of the first coil pair, and which separates a second coil pair that is attached to the outer periphery of the first coil pair. The first coil pair is simply mounted on the cylindrical portion of the coil bobbin and is held and fixed in place by an abbreviated protrusion, which eliminates the need for adhesive tape, which was conventionally used. This eliminates the need for holding and fixing using adhesive tape, which simplifies the work process, improves work efficiency, makes it suitable for mass production, and eliminates the need for adhesive tape, which reduces costs. This device mechanically positions the coil pairs and attaches them to the coil bobbin, and has various effects such as being able to maintain the positional relationship of each coil pair extremely accurately.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a state in which a deflection coil is attached using a conventional coil bobbin for an image pickup tube, and FIG. 2 is a perspective view of a state in which a deflection coil is fixed using a coil bobbin for an image pickup tube according to an embodiment of the present invention. Figure 3 is a cross-sectional side view of the main part,
FIG. 4 is a side view of the main part showing the mounting state of the deflection coil, FIG. 5 is a side view of the main part of another embodiment of the present invention in which the deflection coil is fixed using a coil bobbin for an imaging tube, and FIG. , and FIG. 7 are a perspective view and a side view of a main part in still another embodiment of the present invention, respectively. 11... Coil bobbin for image pickup tube, 14...
... Cylindrical part, 15 ... Separator, 16 ...
...Short-shaped projecting piece, 16B...Short-shape projecting piece end, 18...First coil pair, 21...
...Second coil pair.

Claims (1)

[Scope of utility model registration request] a cylindrical portion; a pair of separators formed in the axial direction at positions approximately 180 degrees apart on the outer surface of the cylindrical portion and separating a first pair of coils attached to the outer periphery of the cylindrical portion; A second coil erected approximately at the center between the separators, an inner surface of the end portion abutting the outer surface of the connecting wire portion of the first coil pair, and a second coil installed on the outer periphery of the first coil pair. 1. A coil bobbin for an image pickup tube, comprising: a pair of abbreviated protrusions formed by separating a pair of coils.