JPS59141121A - Dip rotary cord switch terminal board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention of this application relates to a terminal plate for a Djl) rotary code switch.

A DIP/rotary code switch usually has one common terminal and four output terminals, and by rotating the code plate with the rotor and setting it at a predetermined position, it is possible to conduct energization or de-energization between the common terminal and the output terminal. None, a 4-pin digital signal is obtained.

Typical conventional examples of D, T, P, and rotary code switches will be explained below with reference to the accompanying drawings. In FIG. 1, the DIP-rotary code switch comprises a rotor 1, a base 9 as well as a housing 4, and a groove 2 provided in the rotor 1.
When the screwdriver etc. are fully inserted and the rotor is rotated fully, the click spring 3 protruding from the rotor l slides on the corrugated step 5 provided on the nozzle 4 and generates an X click sound, causing the rotor to rotate. Give stepwise motion to 1.・'Also, since the protrusion (not shown) provided below on the rotor 1 fits into the corresponding hole (not shown) in the code plate 6 provided below the rotor, rotation of the rotor is prevented. Accordingly, the code plate 6 also rotates in the same direction at the same time.

A boss 10 protruding from the center of the base 9 is fitted into the central hole 7 of the rotor 1 and the central hole 8 of the code plate 6, so that the rotor 1 and the code plate 6 can rotate around the boss 10'. be. Reference numeral 11 denotes an O-ring made of silicone rubber or the like, which completely prevents foreign objects from entering the inside of the switch.

The output terminal piece inserted into the base 9 consists of a terminal 12 bent downward, a contact spring part 13 bent along the top surface of the pace 9 inside the switch part, and a contact provided at the tip of the contact spring. The common terminal piece O has a terminal 12' bent downward, a contact spring l3' bent in a direction facing the contact spring 13 of the output terminal piece, and its tip. It consists of a contact portion 14' provided at.

Since the contact portions 14 and 14' can come into contact with the code plate 6, if a nog turn consisting of a conductive portion and an insulating portion is formed on the contact surface of the code plate to the contact portion, the aforementioned As shown in the figure, as the code plate 6 rotates together with the rotor 1,
The energization and de-energization of the switch takes place via the contacts 14.14'. The code board 6 is usually an etched printed circuit board with copper foil or the like attached to a glass epoxy board.

Next, a description will be given of the base on which the terminal board is insert-molded. FIG. 2(4) of the accompanying drawings is a front view of the terminal plate α, and FIG. 2(B) is a side view thereof.

The terminal plate α has four output terminal pieces t having a terminal 12, a contact spring part 13, a contact part ψ14, a common terminal piece C having a terminal 12', a contact spring part 1311 and a contact part 14', and these terminals. Frame connecting the pieces 15. Consisting of l6. As shown in the figure, the terminals 12.12' of the output terminal piece t1 and the common terminal piece C that hang down and protrude to the outside of the switch are bent downward into a U-shape, and the contact portions 14.14' are connected to the base 9, which will be described later. When the code plate 6 is bent along the upper surface of the code plate 6, its triangular apex is able to come into contact with the code plate 6.

Next, FIGS. 3(5), 3(B), and 3(0) illustrate the base 9 on which the terminal plate α is insert-molded. After insert molding, cut the terminal plate α'1X-X, Y-Y along the heel and cut off the frame 15.16''k, then the terminals 12, 12' are moved downward and the contact spring parts 13, 13' are cut off. By bending the base 9 upward, the shape of the base 9 shown in FIG.
, 17' are provided in a protruding manner, and the contact spring portions 13 and 13' are bent along these grooves.

Although typical structural examples of this type of switch have been described above, one of the problems with this type of switch is the cost of gold plating. This type of switch is required to have long-term stability in contact resistance because the frequency of opening and closing is extremely low and the current flowing through it is very small. Therefore, the contact portion 14, 14', the code plate 6
It is common knowledge to apply gold plating to the patterned surface. Therefore, it goes without saying that the cost for plating increases.

One of the goals of the present invention is to improve the shape of the terminal plate α to reduce the overall cost of gold plating.

As a method for plating the terminal board, the first method is to apply gold plating to the entire surface of the terminal board α shown in FIG.
6. Contact spring parts 13, 13' and terminal parts 12, 12'
Of course, since the parts housed in the resin are also plated with gold, the cost is extremely high and uneconomical.

As a second method, as shown in FIG. 4, it is conceivable to perform hoop plating while the terminal plate α is formed into a continuous hoop shape. 1 indicated by the two diagonal lines shown in Figure 4.
The contact portion 14 located on the back side of 8, 18'. The protruding surface of 14'. ! Stripe plating is applied to one side of 11 so as to fully form the plating required for the contact, and extremely thin flash plating is applied to the other parts or parts to the extent necessary for soldering. In this way, thick gold plating is applied to the contact portions 14 and 14' of the output terminal pieces and the common terminal pieces surrounded by diagonal lines 18 and 18', but compared to the first method described above, If you do that, the cost will be about 1/2. According to calculations, in the case of the first method, the cost of terminal plating accounts for approximately 30% of the total material cost of the switch.
It is clear that the second method is very economical. Reference numeral 19 indicates a portion to be cut after completion of hoop plating.

The purpose of the present invention is to further reduce the amount of gold used for gold plating compared to the second method, and FIG. 5 shows a terminal shape that is considered optimal for achieving this purpose. In FIG. 5, the contact spring portion 13' of the terminal 12' of the common terminal piece C is shown.
The terminal plate β is formed so that it does not extend linearly as in the conventional example, but makes a U-turn in the middle and returns to the contact portion 14' and the original frame 15.

By employing the terminal plate β formed in this manner, the two hatched areas in the second method described above are reduced to one, and the contact point in the area surrounded by the shaded area 2'O as shown in FIG. 14.14
If stripe plating is applied only to the protruding surface, the cost will be about 2/3 that of the second method. Note that contact spring 1
Common terminal, output terminal 12.1 without U-turning 3'
2't-The third method of plating on a single diagonal line can be easily realized by arranging the plates so that they are located on the same side.

However, since it is necessary to fix the switch to the entire switch board after soldering it on the printed circuit board, it is necessary to bring out the terminals for the common terminal piece and the output terminal piece on both sides, so the third method corresponding to this is DIP. - This can be said to be an extremely effective method that takes into consideration the configuration of the rotary code switch.

Furthermore, in the third method as well, flash plating is applied to areas other than the areas surrounded by the diagonal line 20, but flash plating? 2. When performing flash plating, it is possible to apply flash plating to only some parts of the solder by masking the parts other than the soldered parts with tape or the like. Third
However, according to the current plating technology,
It is simply not necessary because the cost of taping exceeds the cost of flash plating.

Furthermore, if the chain line portion 21 in Fig. 5 is constructed to temporarily connect the spring portion 13' and the frame 16, dimensional stability during plating work can be ensured, and 21 can be canted simultaneously during the cutting process. .

Next, FIG. 6 shows the structure of a paste formed by insert molding the terminal plate of the present invention. According to FIG. 6, the DII' rotary code switch shown in the typical structure example of FIG. Of course, in terms of practical construction, the entire plating area with precious metals is reduced, and cost reduction can be realized extremely easily.

[Brief explanation of the drawings] Fig. 1 is a cross-sectional view of a conventional DIP, rotary, and code switch, and Fig. 2 is a plan view of the terminal board shown in Fig. 1;
B) is a side view of the same (G). FIG. 3(A) is a plan view of the base on which the terminal plate of the second figure) is insert-molded. Same (B
) is a side view of the same (A), and the same (0) is a sectional view taken along the Z-Z line of the same (■). FIG. 4 is a plan view in which the terminal plates shown in FIG. 2 are continuous in a hoop shape. FIG. 5(A) is a plan view of a terminal board according to an embodiment of the present invention. (B) is a side view of (A). FIG. 6(A) is a plan view of insert molding based on the terminal plate of FIG. 5(4). (B) is a side view of (5). α...Terminal board, β...Terminal board, t...Output terminal piece, C...Common terminal piece, 9...Pace 12...Output end piece terminal 12'...Common Terminal 13 of the end piece...Output terminal piece contact spring part 13'...Contact spring part 14 of the common terminal piece...Contact part 14' of the output terminal piece...Contact part 15.16 of the common terminal piece ...Frame (both ends) Patent applicant Konoguru Electra Co., Ltd. Agent Patent attorney Sakae Kobayashi Figure 1 Figure 2 Figure 3 (C3 Figure 4 Figure 6

Claims (1)

[Claims] ■. A terminal board having a plurality of terminal pieces each having a terminal, a contact spring part, and a contact part, and a pair of frames connecting both ends of these terminal pieces, respectively, wherein the contact part of the common terminal and D11 T) Rotary
Code switch terminal board. 2. Bend the contact spring part of the common terminal and make a U-turn.
D i, I' according to claim 1, in which the contact portion and the terminal are connected to one of the same frames;
Terminal board for φRecord Switch. 3. 1) A terminal board for an IP rotary cord switch as set forth in claim 1, wherein the protruding surfaces of the contact portions of the common terminal and the output terminal group are plated with stripes of a predetermined width.