JPS5814495Y2 - digital switch - Google Patents

Description

[Detailed description of the invention] This invention relates to a digital switch, and in particular, to a circuit configuration that turns off the contact corresponding to a set value and turns off all other contacts, this invention uses a movable contact plate. It is intended to simplify the structure and achieve low manufacturing costs.

This type of digital switch was developed with the intention of being able to reset to any set value by combining it with a counter, for example, and in principle, it can be used to switch from "0" to "9" dotted on a printed board. The purpose can be achieved by providing a movable contact plate having ten movable contacts so that nine of the individual contacts are electrically connected to the common contact.

However, such a movable contact plate as described above must have a very complicated structure, and it is extremely difficult to manufacture it, especially when trying to obtain a small one.

This invention was made in view of the above points, and the details of this invention will be explained based on the following examples. 1 is a printed board, and on this printed board 1 there is a circular common contact C and a Individual contacts S from "0" to "9" are concentric with the common contact C.

, 81, sl...S9 are dotted at equal intervals, and the individual contacts S are arranged on two concentric circles.

, S, , S, ---S, the first auxiliary contact group a.

, al, a2...a9 and a second auxiliary contact group.

, b, , b2...b are arranged at equal intervals.

In the embodiment, each of the individual contacts S.

t 81 r 82...First auxiliary contact a for S9
.

, alta2...a are arranged at positions shifted by one step and serve as second auxiliary contacts.

,bl. b2...b are the first auxiliary contacts a.

, al, a2 .

Regarding the column , the first auxiliary contact a and the second auxiliary contact b
The relationship between 8 and 1 is set.

In the above relative relationship, each of the individual contacts S.

. St, St"...S, are first auxiliary contacts a with corresponding numbers on the back side of the printed board 1.

+al, a2'...a, and the second auxiliary contact.

, bl, b2...b, respectively.

2 is a number wheel located on the side of the printed board 1 so as to be rotatable.

Reference numeral 3 designates a movable contact 3c that is attached to the side surface of the number wheel 2 and makes sliding contact with the common contact C of the printed circuit board 1 during rotation, and the individual contact S.

, Sl, S2...;.S, the movable contact 3s and the first and second auxiliary contacts a.

, al. a2...a, and.

This is a movable contact plate that is provided with four movable contacts 3a and 3b that are in sliding contact with tl)1s b2...b, respectively, aligned on the centripetal line, and this invention consists of three movable contact plates. 3 are attached to the number wheel 2 at intervals of 1'08° in the row of movable contacts.

Note that the movable contact plate 3 having the above-mentioned configuration is a conventionally known B.
This is similar to the one commonly used for CD code output digital switches.

Next, we will explain the output state of this invention, which is equipped with the printed board 1, number wheel 2, and movable contact plate 3 as described above.
When the movable contact 3s is in the position, the movable contact 3s of the movable contact 3,
3a, 3b, and 3c are individual contacts S, respectively.

, the first auxiliary contact a9, the second auxiliary contact b8, and the common contact C, and the other two movable contacts 3s, 3a, 3b, and 3c of the movable contact plate 3 are in contact with the individual contacts S.
It is in contact with the corresponding individual contacts and the first and second auxiliary contacts at positions 7 and 84.

In other words, in this state, the output state is such that only the individual contact S1 is off and all other individual contacts are on. .

, Sl. Two auxiliary contacts are connected to S2...S, and the movable contact plate 3 has a movable contact 3s that contacts the individual contacts and a movable contact 3 that contacts the auxiliary contact.
a and 3b, so that the corresponding individual contact is turned on by contact continuity with the auxiliary contact, and using the three movable contact plates 3, one of the individual contacts is always turned off and the others are turned off. It is designed so that it can be turned on, and the movable contact plate 3 of a conventionally known digital switch for BCD codes can also be used, making it possible to greatly contribute to lower manufacturing costs.

In addition to the examples shown, the first and second auxiliary contacts connected to the individual contacts may be arranged in the same row, but in this case, the first and second auxiliary contacts The movable contacts 3a and 3b that are in sliding contact with the individual contacts may be formed with a phase shift of one step and two steps relative to the movable contact 3s that is in sliding contact with the individual contacts.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a diagram showing the pattern structure of a printed board, and FIG. 2 is a diagram showing the arrangement and structure of the movable contact plate. In the figure, 1 is a printed board, So, 81, S2,
...S. are individual contacts, aO+aL+a2...a is the first auxiliary contact group, bo, bx, bz...b are the second auxiliary contact group, C is the common contact, 2 is the number wheel, 3 is the movable contact plate, 3s23a and 3br3c are movable contacts.

Claims (1)

[Scope of utility model registration request] From “0” to “ on the same circumference as the common contact on the printed board
A first auxiliary contact group and a second auxiliary contact group each having individual contacts up to 9" dotted at equal intervals and aligned with each of the individual contacts on two circumferences that are concentric with the circumference. and each individual contact forms one of the first auxiliary contact groups.
The first group of auxiliary contacts is connected to the auxiliary contacts of the second group of auxiliary contacts that are shifted in phase by one step, and the number wheel located on the side of the printed circuit board is connected to the first group of auxiliary contacts. A digital switch characterized in that three movable contact plates each having four movable contacts that slide on the common contact, the individual contacts, and the first and second auxiliary contact groups are arranged at intervals of 108°. O