JPH0427647B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The invention of this application is DIP.Rotary. It concerns code switches.

(Prior Art) First, a conventionally used switch of this type will be explained with reference to the accompanying drawings. Figures 1 to 3
The figure shows the external shape of a conventional switch of this kind, in which a rotor b is rotatably disposed within a housing a on a base d via a disk (not shown). One common terminal c from the base d
(referred to as a common terminal) and four terminals e are provided protrudingly.

This kind of rotary. The purpose of the code switch is
For example, a 4-bit digital signal is extracted by rotating the rotor b together with the disk and setting it at a predetermined position. Therefore, as shown in Fig. 4, the switches S ₁ , S ₂ , S ₃ , and S ₄ are turned on and off as appropriate for each position of the rotor b, and output 16 types of codes. It is structured so that you can get it.

(Problem to be solved by the invention) However, this rotary. In the code switch, the wiring is complicated and the construction is complicated, which causes defects such as troublesome manufacturing. FIG. 5 is presented as an example to show these wiring configurations. illustrated
In the IC theoretical circuit, each signal line is connected to the power supply line Vcc through a resistor R in order to sufficiently guarantee the threshold level. This method is called a pull-up, and this resistance is called a pull-up resistor. Depending on the logic, it is also possible to connect the common terminal c of the switch to the power supply line Vcc and drop the resistor to ground G. This method is called pulldown. Regardless of whether the above-mentioned pull-up method or pull-down method is adopted, a plurality of resistors are required for one switch. Therefore, designing a print pattern etc. naturally becomes complicated and troublesome.

Next, FIG. 6 is presented as a similar usage example.
In this use case, the rotary. This is a case where a plurality of code switches are lined up and used as digits of 1, 10, 100, etc. for address setting, etc. In order to read the address number, the terminals of the switches are connected to the common line from the decoder f, and the common terminal c of each switch is grounded down in sequence. For this purpose, four diodes are required for each switch in addition to the pull-up resistor described in the first usage example. For example, if the 1st place switch g represents 2 and the 10th place switch h represents 6, if you drop the common terminal c of the 1st place switch g to ground in order to read the 1st place, 1, Only 2 of 2, 4, and 8 signal lines are low
level, but since switches 2 and 4 of switch h in 10th place are connected through common terminal c of switch h in 10th place, if there is no diode, 4's The signal line also falls to the L level, and the first digit is treated as 6. Therefore, if you try to use a code switch with the above configuration for setting a telephone number on a facsimile machine, etc., this type of code switch is usually
10 switches are required, and 4 resistors and 40 diodes must be used around these switches. For this reason, the design of the printed circuit board used is not only extremely complicated and difficult, but also has drawbacks such as an increase in the area of the printed circuit board and an increase in assembly cost.

(Means for Solving the Problems) The present invention aims to overcome the various deficiencies of the conventional example, and includes a rotatable rotor 12 and a part of the base 14 housed in the housing 10. , one common terminal 16, one pull-up terminal 18, and a plurality of output terminals 20 are provided at the end of the circuit board 30 embedded in the base 14, and a common terminal contact conductor 46c provided on the upper surface of the circuit board 30. The same number of contact conductors 46a as the output terminals 20,
46b, 46d, and 46e have grooves 3 of the base 14.
The contact portions 36a to 36e accommodated in the output terminals 46a to 36e are arranged so as to be contactable, and the common terminal contact conductor 46c is connected to the common terminal 16, and the same number of contact conductors 46a, 46b, 46d, and 46e as the output terminals are connected to each other. A connected conductor pattern 47a is provided on the lower surface, and a pull-up terminal conductor 47c connected to the pull-up terminal 20 and an output terminal conductor 47b connected to the output terminal 20 are provided on the lower surface, and the pull-up terminal conductor 47c and the output terminal conductor 47b are connected with the same number of resistors 50 as the output terminal 20, and the conductive pattern 47a and the output terminal conductor 47b are connected with the same number of diodes 32 as the output terminal 20. , a contact portion 36 housed in the groove 34 of the base 14
Among a to 36e, the upper end of the common terminal contact portion 36c is located at a certain location in a pattern formed on the lower surface of the disk 38 of the rotor 2, and the other contact portions 36a, 36b,
The upper ends of 36d and 36e are DIP. It is a code switch.

(Embodiments) Examples of the present invention will now be described with reference to the accompanying drawings of this specification.

7 to 9, a rotor 12 is housed in a housing 10 via a disk (not shown) so as to be rotatable on the upper surface of the base. A circuit board 30 on which a common terminal 16, a pull-up terminal 18, and a plurality of output terminals 20 are mounted on the base 14.
to accommodate. Reference numeral 22 indicates the rotor 1 as described later.
This is a rotation slit carved into the top surface of 2. 1st
In FIG. 0, the rotor 1 is provided with a click spring part 24 on the outside inside the housing 10 and a hole part 28 on the lower surface that can fit into the center protrusion 26 of the base 14.
2 is accommodated. Reference numeral 15 denotes an O-ring inserted between the housing 10 and the rotor 12 to seal the two members. A circuit board 30 made of ceramic or the like is embedded in the base 14 fitted into the housing 10, and conductors 46a, 46b, 46c, 46d, 46e, which will be described later, are mounted on the upper surface of the circuit board 30.
Also, on the bottom surface there is a diode 32, as described later.
A low antibody 50 and a group of conductors are provided. Further, contact portions 36a, 36 are provided in a plurality of square slots 34 formed in the base 14 so as to reach the upper surface of the circuit board 30.
b, 36c, 36d, and 36e are accommodated. A protrusion (not shown) provided on the lower surface of the rotor 12 fits into an opposing hole (not shown) formed on the upper surface of the disk 38. The center portion of the disk 38 is fitted into the base protrusion 26 and is rotatable on the upper surface of the base 14 as the rotor 12 rotates.

The lower surface of the disk 38 forms a printed board (not shown) provided with an appropriate pattern, and as the rotor rotates, a predetermined portion of the pattern contacts the contact portion 3.
The switch is configured to be energized or de-energized depending on the contact status with 6.

The configuration of the base 14 will be explained in more detail. 1st
In Figure 1, terminal groups 16, 18, and 20 are punched out from a primary plate-shaped body, and a base 14 is insert-molded using synthetic resin or the like while each terminal is connected by an edge piece 40 of the plate-shaped body. The upper surface is shown, and the edge piece 40 is cut off along the lines X-X and Y-Y to form a desired group of terminals, and each is bent in a predetermined direction at a cutout 42 provided at the end of the rear base 14. This causes the terminal group to hang down from the base.

The common terminal 16, the pull-up terminal 18, and the output terminal group 20 are respectively attached to both sides of the circuit board 30. One way to do this is as shown in FIG. As shown in FIG. 12, a forked portion 44 provided at the end of the terminal.
Both sides of the circuit board 30 may be held between them.

FIG. 13 is a top view of the circuit board 30, in which contact conductors 46a, 46b, 46c, 46d, and 46e are arranged, and this inner contact conductor 46c is a common terminal contact conductor. These conductors may be formed by printing a conductive paste and then firing it. The contact conductors 46a, 46
Contact portions 36 are provided on b, 46d, and 46e, respectively.
a, 36b, 36d, and 36e, and a common terminal contact portion 36c is disposed on the common terminal contact conductor 46c so as to be contactable.

Further, as shown in FIG. 14, on the lower surface of the circuit board 30, the common terminal 16 and the common terminal conductor 47d are connected to the common terminal contact conductor 46c on the upper surface via a through hole 49, and the common terminal 16 and the common terminal conductor 47d are connected to the common terminal contact conductor 46c on the upper surface. The conductors 46a, 46b, 46c, and 46d have four conductor patterns 47 provided on the lower surface corresponding to them.
a are connected through through holes 48, respectively. Further, on the lower surface of the circuit board 30, the pull-up terminals 18 are connected to the pull-up terminal conductors 47c, and the output terminal group 20 is respectively connected to the output terminal conductor group 47b.

The pull-up terminal conductor 47c is connected to the output terminal 2.
0 and the same number of resistors 50 are connected to the output terminal conductors 47b, respectively, and the output terminal 20
The same number of diodes 32 are connected to the output terminal conductor 47b and the conductor pattern 47a. These conductor groups and resistor groups are each made by printing and firing a paste. These members are also connected to their respective terminals and diodes 32 by soldering as shown. 4 diodes 3
2 is housed in a package, and the anode side is connected to the output terminal conductor 47b and the cathode side is connected to the conductor pattern 47a, but it is of course possible to use the opposite connection method depending on the logic of the circuit used. be.

The diode 32 used in the embodiment of the present invention is a small diode housed in a so-called mini-mold package, and has four terminals.Since two diodes are housed in one package, the diode 32 shown in FIGS. Two diodes 32 are shown in the diagram.
is shown in the figure, but it goes without saying that if there are four diodes, one package may be sufficient.

After attaching the conductor and other related components to the circuit board 30 as described above, insert molding is performed using synthetic resin or the like, and the rear edge 40 is formed by X-X, Y-Y.
The DIP. rotary cord switch of the present invention is completed by cutting off the wire along the line and bending and hanging each terminal at the stepped portion 42. Also, the circuit of this switch is
As shown in Figure 5. That is, one common terminal 16 and a plurality of output terminals 20 are provided, and a pull-up terminal 18 is separately provided, and the pull-up terminal 1
8 conductor 47c and the conductor 47 of the plurality of output terminals 20
b are connected with the same number of resistors 50 as the output terminal 20, and the conductor 47b of the output terminal 20 and the conductor pattern 47a are connected with the same number of diodes 32 as the output terminal. By inserting a driver into the slit 22 of the rotor 12 and rotating it in a predetermined direction at a predetermined angle, the spring portion 24 generates a clicking sound inside the rotor 12, and the rotor 12 slides on the upper surface of the base 14 together with the disk 38. Accordingly, depending on the contact state of the contact portions 36a to 36e of the pattern provided on the disk, energization or de-energization occurs, and the switch is operated.

At this time, the lower end of the common terminal contact portion 36c is connected to a common terminal conductor 46c formed on the upper surface of the circuit board 30,
The upper end thereof is always in contact with a certain part of the printed board pattern provided on the disk 38, but the lower ends of the other contact portions 36a, 36b, 36d, 36e are connected to the contact conductors 46a, 46b on the upper surface of the circuit board 30,
46d and 46e, their upper ends successively contact the pattern formed on the disk 38 that rotates together with the rotor 12.

The present invention has electronic elements arranged on both sides of a board and is housed in the base, and the structure and circuit of the switch are extremely simple, do not require a complicated design, use a small board area, and are compact. It has the advantage that it can be used in various small electrical devices because it is

[Brief explanation of drawings]

Attached Figures 1 to 6 are conventional examples of DIP rotary. Figure 3 illustrates a code switch. Figure 1 shows a conventional DIP rotary. A plan view of the code switch. FIG. 2 is a side view of FIG. 1. FIG. 3 is a first bottom view. Figures 4, 5, and 6 show conventional DIP rotary models. Code switch circuit diagram. FIGS. 7 to 15 show the DIP. rotary according to the present invention.
1 illustrates one embodiment of a code switch. Figure 7 shows the DIP rotary according to the present invention. A plan view of the code switch. FIG. 8 is a side view of FIG. 7. Figure 9 is the first
Bottom view of the figure. FIG. 10 is a sectional view taken along line A-A in FIG. 7. FIG. 11 is a plan view of the circuit board before insert molding is performed and the edges are not cut. FIG. 12 is a sectional view taken along the line BB in FIG. 11. FIG. 13 is a plan view showing the surface of the ceramic substrate before insert molding is performed on the base. FIG. 14 is a bottom view of FIG. 13. FIG. 15 is a circuit diagram of a switch according to the present invention. 10...Housing, 12...Rotor, 14...
... Base, 16 ... Common terminal, 18 ... Pull-up terminal, 20 ... Output terminal, 30 ... Circuit board, 32 ... Diode, 34 ... Groove, 36a,
36b, 36c, 36d, 36e...Contact part, 3
8...Disk, 46a, 46b, 46d, 46
e...Contact conductor (top surface of circuit board), 46c...Common terminal contact conductor, 47a...Conductor pattern (back surface of circuit board), 47b...Output terminal conductor, 47c
...Pull-up terminal conductor, 47d...Common terminal conductor (back side of circuit board), 48, 49...Through hole, 50...Resistor.

Claims (1)

[Claims] 1. A rotatable rotor and a part of a base are housed in a housing, and a circuit board embedded in the base has one common terminal, one pull-up terminal, and a plurality of outputs at the end of the circuit board. Terminals are provided, and contact portions accommodated in grooves of the base are disposed so as to be able to contact each other on the same number of contact conductors as the common terminal contact conductor and output terminals provided on the upper surface of the circuit board, and the common terminal contact conductor is disposed on the top surface of the circuit board. A conductor pattern connected to the common terminal and the same number of contact conductors as the output terminals is provided on the bottom surface, and a pull-up terminal conductor connected to the pull-up terminal and an output terminal body connected to the output terminal are provided on the bottom surface. The pull-up terminal conductor and the output terminal conductor are connected by the same number of resistors as the output terminals, and the conductor pattern and the output terminal conductor are connected by the same number of diodes as the output terminals, so that the disk rotates together with the rotor. At this time, among the contacts housed in the base groove, the upper end of the common terminal contact part is placed at a certain point on the pattern formed on the rotor disk, and the upper end of the other contact parts is placed on one of the patterns on the disk that rotates with the rotor. DIP rotary that allows sequential contact. Code switch. 2. Claim 1, characterized in that the ends of the output terminal, pull-up terminal, and common terminal are formed into forked shapes, and the circuit board is held between these forked parts.
DIP.Rotary as described in section. Code switch.