JPS5926616Y2 - Board terminal hole structure - Google Patents

Description

[Detailed description of the invention] The present invention relates to the terminal insertion hole structure of the board, and despite the large dimensional tolerance of the board or the warpage of the board, the present invention relates to the terminal insertion hole structure of the board. It is an object of the present invention to provide a structure that allows two terminals to be inserted well at one time.

As a board to which the terminal insertion hole structure of a conventional board is applied,
For example, there is one shown in FIG.

In the figure, a substrate 1 is provided with a plurality of through holes 2 at a predetermined pitch along its longitudinal direction.

Further, numeral 3 in FIG. 2 is a circuit component, and a plurality of terminals 4 are implanted in a roughly comb-like shape at the same pitch as the hole 2 pitch.

Therefore, in order to attach the circuit component 3 to the board 1, it is sufficient to align the plurality of terminals 4 with the plurality of holes 2 and insert them at once.

However, according to the above conventional example, the holes 2 usually have a perfect circular cross section, and if the substrate 1 is made of ceramic and the pitch of the holes 2 varies due to firing during substrate manufacturing, the terminals 4 cannot be inserted. It becomes impossible to install.

Even if there is no variation in dimensions, if the board 1 warps due to some conditions as shown in Figure 2, even if the terminal 4 in the center of the figure is inserted smoothly, the terminals on both sides in the figure may The other terminal 4 has a disadvantage in that it interferes and abuts against the inner peripheral wall of the hole 2, making it difficult to insert it smoothly and making it impossible to attach it.

Particularly when this terminal attachment is carried out using an automatic machine (because of its nature, it is better for automatic machines to have a greater degree of freedom in attachment), it is conceivable that the assembly process will stop and troubles will occur frequently.

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

FIG. 3 is a plan view of a board to which an embodiment of the terminal insertion hole structure of the board according to the present invention is applied.

The substrate 11 shown in the figure is formed by firing a ceramic in which, for example, a plurality of hole rows 12 are provided at a predetermined pitch along the longitudinal direction.

The hole row 1 has a perfect circular cross section with the hole 12a located at the center, and the inner diameter in the predetermined direction gradually increases as each pair of holes 12b to 12d on both sides symmetrically move away from the center. The cross section has a long hole shape.

Therefore, when attaching the circuit components 3 to the board 11, all the terminals 4 can be inserted smoothly based on the center of the terminals 4 even if there are variations in the pitch dimensions of the holes 12a to 12d due to firing of the board 11. can.

Furthermore, even if the board 11 is warped as shown in FIG. 4, the holes 12b to 12d on the end side of the board 11, where the degree of warp is large, are elongated and have a sufficient cross-sectional area in the terminal insertion direction. , the terminal 4 has not only holes 12a but also holes 12b~1.
It is smoothly inserted without interference and contact with the inner circumferential wall of 2d, and a good installation is achieved.

Note that the hole rows 12 (holes 12 a to 12 d) do not need to be provided symmetrically; some of the holes may be omitted, and the left and right hole rows may have different pitches, Furthermore, the present invention is not limited to a single row, but may include a plurality of rows, and an embodiment thereof is shown in FIG.

The substrate 13 in FIG. 5 is a ceramic substrate having two rows of holes 14 and 15.

The hole row 14 has a perfectly circular hole 14a in the center, three holes 14b to 14d on the right side in the figure, and two holes 14 on the left side.
4e and 14f are provided at different pitches, and each of the holes 14b to 14f is provided as a long hole having an inner diameter in a predetermined direction that gradually increases in proportion to the distance from the center.

The hole row 15 does not have a perfectly circular hole in the center, but has two holes 15 a and 15 b on the right side in the figure, and one hole 15 on the left side.
Each hole C is provided in the same long hole shape as the hole row 14 described above.

This substrate 13 has the above-mentioned hole rows 14, 1 as in the case of FIG.
A circuit component (not shown) having terminals with the same pitch as 5 can be attached.

Furthermore, according to the above board 11.13, the function of the elongated hole allows for a large degree of structural freedom in mounting the board 11.13 and the terminal 4, so it cannot be applied to an assembly line of an automatic machine where position adjustment etc. cannot be performed. It is effective.

Also, according to the above structure, external shocks are buffered by the terminal 4.
The reliability of the structure is high because it can be transmitted to

Note that the holes in the substrate 11 and 13 have a perfect circular or oblong cross-sectional shape, but are not limited to this, and may have a combination of square or rectangular shapes according to the cross-sectional shape of the terminal 4, or may have various other cross-sectional shapes. can be taken.

As described above, according to the terminal insertion hole structure of the substrate according to the present invention, a plurality of comb-shaped terminals that are integral with each other can be inserted into the plurality of terminal insertion holes provided along a predetermined direction of the substrate at one time. In the structure where the terminal insertion hole is mounted, the cross-sectional shape of each of the plurality of terminal insertion holes is such that the inner diameter dimension in the predetermined direction is larger in the outer diameter hole than in the center hole. Even if the dimensions of the terminal insertion holes vary during the formation of the board, multiple terminals can be inserted smoothly at the same time, and even if the board is warped, the holes near the ends of the board where the warp dimension is large are the same as above. Since the shape has a large inner diameter dimension, a sufficient cross-sectional area in the terminal insertion direction is ensured, allowing the plurality of terminals to be smoothly inserted and installed properly. A greater degree of freedom in installation is better.It is effective when applied to the installation process and can reduce process troubles.Also, since the board and terminals have a slight degree of freedom even after installation, shocks transmitted to the terminals from the outside are buffered. This has the advantage of improving the reliability of the mounting structure.

[Brief explanation of the drawing]

1 and 2 are respectively plan views of a board to which a conventional example of the terminal insertion hole structure of the board is applied, and a diagram showing a state in which a circuit component with a terminal is attached to the board, and FIGS. 3 and 4 are respectively A plan view of a board to which one embodiment of the terminal insertion hole structure of the board according to the present invention is applied, and a diagram showing a state in which a circuit component with a terminal is attached to the board, and FIG. 5 is a diagram to which another embodiment of the above structure is applied. FIG. 1.11.13--...Substrate, 2.12 a ~1
2d, 14a-14f. 15 a to 15 C... hole, 3... circuit component, 4... terminal, 12.14.15...
...hole row.

Claims (1)

[Scope of utility model registration request] In a structure in which a plurality of comb-shaped terminals that are integral with each other are inserted and attached at a time into a plurality of terminal insertion holes provided along a predetermined direction of a board, the cross-sectional shape of each of the plurality of terminal insertion holes is A terminal insertion hole structure of a board, wherein the hole in the outer part has a larger inner diameter in the predetermined direction than the hole in the center part.