JPS6127149Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a case for electronic components, in which a grounding terminal portion integrally formed at the bottom of the case is bent inward and connected to a terminal pin embedded in a board on the bottom surface of the case. It is an object of the present invention to provide a case for electronic components that can make the entire high-frequency coil ultra-small and improve its productivity by engaging and conducting.

Recently, in order to enable the adoption of automatic machines, high-frequency coils have been used in which, for example, a plurality of terminals and a ground terminal of the coil are arranged at intervals of 2.5 mm.

As an example of such a conventional high-frequency coil, as shown in FIGS. 1A and 1B, there is a ground terminal 2 integrally formed at a predetermined position on the lower part of one side plate of the case 1, and a ground terminal 2 formed on the lower surface of the case 1. Case 1
Five board terminals 5 to which the lead wires 4 of a plurality (five in this example) of a coil (not shown) housed in a predetermined position inside are electrically connected to each other in a plan view. There was a configuration in which they were arranged in parallel with a distance of 2.5 mm and in parallel directions with a distance of 2.5 mm.

However, such a conventional high-frequency coil has a structure in which the ground terminal 2 is placed further to the left, for example, by 2.5 mm, from the board terminal 5 on the left side in FIG. The six board terminal mounting holes 6 and four lead wire extraction grooves 7 are arranged asymmetrically with respect to the board 3, and therefore the shape of the board 3 is asymmetrical, and as a result, during assembly. The position of the ground terminal 2 must be considered,
There were drawbacks such as reduced productivity and difficulty in miniaturization since the substrate 3 must necessarily have an area of at least 2.5 mm x 7.5 mm.

The present invention eliminates the above-mentioned drawbacks, and each embodiment thereof will be described below with reference to the drawings.

FIGS. 2A and 2B show a perspective view and a bottom view of an example of a high-frequency coil to which an embodiment of the electronic component case according to the present invention is applied, respectively. In the figure, reference numeral 30 denotes a metal case, and as shown in FIG. 3, a ground terminal lug 33 is integrally formed at a predetermined position under a predetermined side plate 32 of a housing 31 which is open at the bottom by a predetermined amount. It is said to be composed of A substantially semicircular notch 34 is provided at the bottom of the ground terminal lug 33 .

19 is a board with a coil attached to its upper surface, and as shown in FIG. 2B, coils 6 are arranged in a grid pattern on the bottom surface of the board
The main board terminals 20, 20a are inserted into the lower opening 35 of the case 30 as appropriate. Five lead wires 21 of a coil (not shown) are respectively drawn out to the lower surface of the substrate through the plurality of grooves 18 of the substrate 19 and electrically connected and fixed to the corresponding terminals 20, respectively.

Thereafter, the ground terminal lug 33 is appropriately bent inside the case 30, and its notch 34 is engaged with a predetermined board terminal 20a (in this embodiment, this board terminal 20a serves as the ground terminal). Connect directly electrically and fix with solder, etc. Thereby, a high frequency coil is obtained.

According to this, due to the presence of the ground terminal lug 33, one of the six board terminals 20 arranged in a grid pattern can be used as a ground terminal as it is, and unlike the conventional example, it is possible to use one of the board terminals 20a as a ground terminal. Since there is no need to take into account the positional relationship with the ground terminals, the board 19 only needs to have minimum dimensions to which six board terminals 20 can be attached, that is, an area of at least 2.5 mm x 5.0 mm. As a result, the area of the substrate 19 can be reduced by approximately 2.5 mm x 2.5 mm compared to the conventional example, and the entire high frequency coil can be miniaturized.

Further, since the shape of the substrate 19 is symmetrical as described above, for example, the substrate 19 of the substrate terminal 20 as described above
The attachment work to the ground terminal lugs 33 can be carried out simply by arranging them in a grid pattern independently of the earth terminal lugs 33, which improves productivity.

Further, as described above, the ground terminal lug 33 is engaged with one predetermined board terminal 20a, and this board terminal 20a is closed.
Since the ground terminal is used as a ground terminal, the length of the ground terminal lug 33 can be relatively short. Therefore, the overall length of the aperture of the case 30 can be made relatively short compared to the conventional example, which reduces production costs. Improves sex.

In addition, as mentioned above, since the ground terminal is set as one of the board terminals 20a of the board terminals 20 and the ground terminal portion integrally formed in the case is not used, it is not possible to use the ground terminal part integrally formed in the case, for example, on other printed circuit boards to which a high frequency coil is attached. All the holes to be drilled can have the same shape.

In the above embodiment, the case 30 is provided with one ground terminal lug 33, but
As shown in FIG. 4, two ground terminal lugs 37a and 37b are provided point-symmetrically at predetermined positions in the lower part of the case 36, and these lugs 37a and 37b are appropriately bent inside the case 36. The notches 38a and 38b may be engaged with two corresponding predetermined board terminals 20a and 20b and fixed by soldering or the like.

Further, in the above embodiment and its variations, the cutout portions 3 of the ground terminal lugs 33, 37a and 37b
4, 38a and 38b to board terminals 20a and 20
The width of the notches 34, 38a and 38b (indicated by the symbol t in FIG. 3) is suitably smaller than the diameter of the board terminals 20a and 20b. do,
It may also be configured to be crimped and engaged with the board terminals 20a and 20b.

Further, the cutouts 34, 38a and 38b of the ground terminal lugs 33, 37a and 37b are not necessarily provided, and the lugs may simply be bent and soldered to the board terminals.

As mentioned above, the electronic component case of the present invention has a grounding lug integrally formed protruding from the lower side of the case, and the grounding lug is bent inward to be electrically connected to the terminal pin. Therefore, one terminal pin among the plurality of terminal pins arranged in a lattice pattern can be directly used as a ground terminal via the above-mentioned grounding lug, and when the grounding terminal part is integrally protruded from the case. There is no need to consider the equipment space, the equipment can be made smaller, and the board can be made symmetrical to improve installation workability.
In addition, the terminal pin is stronger than the grounding terminal that protrudes from the case, so it stabilizes the configuration accordingly.
Furthermore, all the terminal pins have the same pin shape, which improves the workability of attaching them to other boards.Also, since the grounding lug itself does not function as a grounding terminal, great precision is not required for bending it. The bending work is easy, and since the grounding lug itself does not require a very long dimension, the drawing depth of the case is small and manufacturing is easy.

[Brief explanation of the drawing]

Figures 1A and B are respectively a perspective view and a bottom view of an example of a conventional high-frequency coil, and Figures 2A and B are examples of a high-frequency coil to which an embodiment of the electronic component case of the present invention is applied. A perspective view and a bottom view thereof, 3rd
This figure is a perspective view of the case, and FIG. 4 is a bottom view of a high-frequency coil to which a modification of the above embodiment is applied. 1, 30, 36... Case, 2... Earth terminal, 3, 19... Board, 5, 20, 20a, 20
b... Board terminal, 33, 37a, 37b... Earth terminal lug, 34, 38a, 38b... Notch.

Claims (1)

[Scope of utility model registration request] In an electronic component case that houses an electronic component in which a board with terminal pins embedded in the bottom surface of the case is fixed, a grounding lug is integrally formed to protrude from the lower side of the case, and the grounding lug is bent inward. A case for an electronic component having a configuration in which the terminal pin is electrically connected to the terminal pin.