JPH0447961Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is used in wireless communication equipment and relates to the base of electronic parts such as crystal filters.

Prior Art Conventionally, the glass block leg 8 provided on the base 6 of an electronic component was formed by piling up molten glass on the surface through the mounting hole 7 provided in the base 6, as shown in FIG. In some cases, as shown in FIG. 5, the water flows around the bottom surface of the base 1 and forms a low-height block leg 8a. Therefore, the height of the block legs 8 formed on the base 6 is not constant and becomes irregular, causing looseness and resulting in a defective product.

This invention was made in an attempt to improve these drawbacks.

Means for Solving the Problems This invention will be explained below with reference to drawings as an example of its implementation. 1 is a base of an electronic component for communication equipment;
For example, it is a base of a crystal filter, and a cap 2 is attached to the upper surface of the base, and the crystal filter is hermetically housed inside. Reference numeral 3 denotes glass block legs formed at the four corners of the lower surface of the base 1. Reference numeral 4 denotes a welding attachment hole for the glass gob legs 3 provided in the base 1. A flow hole 4 is provided on the bottom surface of the base 1 with a diameter larger than the hole edge diameter of the welding attachment hole 4 and corresponding to the diameter of the proximal end of each gob leg 3. The stopper edge 5 is formed by communicating the recesses.

As shown in FIG. 2, instead of recessing the lower surface of the base 1, the flow stopper edge 5a may be formed by a protruding edge 5a1.

Since this device is formed as described above, the welding attachment hole 4 of the base 1 and the molten glass lump legs 3 rising on the base surface are dammed by the flow stopper edge 5, and from there they flow out to the surroundings. This prevents this from happening and solidifies in the form of a lump that rises up at the specified location.

Effects of the invention From the above, according to this invention, the molten glass lump leg is prevented from flowing out around the edge of the fusion attachment hole with a predetermined diameter, so the height of the bulge is always constant, and therefore the height of the lump leg is The height is constant, and all the four corners of the base 1 have the same height, so there is no wobbling and the defect rate can be reduced. In addition, since there is no leakage to the surrounding area, the heap can be made as high as possible and the height of the block leg can be increased. Particularly in a melting and solidifying furnace, even if the temperature inside the furnace increases or the viscosity of the molten glass gob decreases, it will not flow out into the surroundings, and therefore productivity will be improved from this point as well.

[Brief explanation of drawings]

The drawings show an embodiment of this invention,
Fig. 1 is a longitudinal sectional view showing an example of fusion attachment of glass gob legs using this invented base, Fig. 2 is a longitudinal sectional view showing another embodiment, and Fig. 3 is an overall electronic component equipped with this invented base. The external view, FIGS. 4 and 5 are partial vertical sectional views showing a conventional example. 1...Base of electronic parts, 2...Cap, 3
...Glass block leg, 4...Fusion attachment hole, 5...Flow-stop screen edge.

Claims (1)

[Scope of utility model registration request] In the base of the electronic component, a stopper edge is provided to surround the hole edge of the welding attachment hole drilled at a suitable location on the lower surface of the base by protruding or recessing to an appropriate height from the lower surface of the base. A base for an electronic component characterized by having the base end of a glass block leg fused and solidified.