JPS5840659Y2 - Readout counter - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a lead-out counter.

Conventionally, for example, a readout counter that takes 10 steps (from 0 to 9) per revolution has been constructed as shown in FIG. 8 when a reed switch is used to obtain a 5C2 (combination) output code.

That is, five pulse generating reed switches I.

II, III, IV, and V, and five rows of permanent magnet groups for operating the above-mentioned reed switches (1) to (V) are mounted on a freely rotatable rotating disk by means such as gluing, and the rotating disk is made up of 10 During the step and one rotation, each reed switch ■~V operates four times, and as shown in Fig. 9, each reed switch
It was configured so that output codes with 0 types of combinations could be obtained.

However, according to the conventional readout counter configured as described above, the permanent magnets for operating reed switches I~■ are arranged in 5 rows of 8 permanent magnet groups to operate each reed switch ■~■. In total, 40 pieces were needed.

Therefore, it is necessary to provide a large interval between each column so as not to cause magnetic interference with the permanent magnet group in each column or with other columns, which has the disadvantage that the shape of the readout counter becomes large.

Furthermore, since as many as 40 permanent magnets are attached to the rotating disk, the rotating disk becomes heavy and has a disadvantage in that its rotational ability is reduced.

Furthermore, it is extremely difficult to firmly and inexpensively fix as many as 40 permanent magnets to a rotating body; therefore, some of the permanent magnets may fall off due to vibrations, shocks, etc. during rotation of the rotating body. It also had drawbacks such as causing the readout counter to stop functioning.

This invention is aimed at solving the above-mentioned conventional drawbacks, and will be explained below based on the drawings showing one embodiment of this invention.

That is, in FIGS. 1 to 7, reference numeral 1 denotes an electromagnet, which is energized by an input pulse signal corresponding to a measured value.

Reference numeral 2 denotes a transmission lever, which is operated by the electromagnet 1 and drives the number wheel 3 in the direction of the arrow.

Numbers 0 to 9 are attached to the outer periphery of the number wheel 3, and a display window 6 displays the number corresponding to the measured value.

Reference numeral 4 denotes a magnetic shielding plate, that is, a control plate attached to the number wheel 3, and is made of a ferromagnetic material, such as an iron plate, in the shape of a disk, and has cutouts 41, 42, and 43 formed in a portion thereof.

These notches 41, 42, and 43 cut the discs from A to A as shown in the third figure.
It is formed by dividing J into 10 equal parts and removing A, B, D, and G parts.

7 to 11 are well-known single-pole, single-throw reed switches;
They are placed at 2° intervals.

Permanent magnets 12 to 16 are provided facing the five reed switches 7 to 11 to close (ON) the reed switches.

Then, the reed switches 7 to 11 and the permanent magnets 12 to
16 is arranged to sandwich the rotation path of the notches 41, 42, and 43 of the magnetic shielding plate 4, and when the magnetic shielding plate 4 is interposed between the reed switch and the permanent magnet, the permanent magnet acts on the reed switch. When the reed switch is turned off by shielding the magnetic flux caused by the magnetic shielding plate 4, and when the magnetic shielding plate 4 is not interposed between the reed switch and the permanent magnet,
That is, when the notches 41.degree. 42.43 of the magnetic shielding plate 4 correspond to each other between the reed switch and the permanent magnet, the magnetic flux of the permanent magnet acts on the reed switch to turn it on.

FIG. 4 shows the sC2C2 output obtained by the readout counter of this invention. The numbers 0 to 9 are the numbers displayed by the number wheel 3 on the display window 6, and the number ■ in I-V is the reed switch 7. , II is reed switch 8, II
I is reed switch 9, IV is reed switch 10, ■
indicate reed switches 11, respectively.

The symbol ON in the table indicates that reed switches 7 to 11 are turned on.

For example, when the number wheel 3 is displaying 0, it means ■ and III, that is, reed switches 7 and 9 are ON and the other reed switches 8, 10, and 11 are OFF.

The operation of the lead-out counter according to the invention constructed as above will be explained.

That is, FIGS. 5 and 6 show the state when the number wheel 3 is rotating in the direction of the arrow and the number wheel 3 is displaying 0.

In this state, the notches 41 and 43 of the magnetic shielding plate 4 are each opposed to the reed switch 7.9, so that they are each turned on by the permanent magnets 12.14 as described above.

On the other hand, reed switch 8.10.11 and permanent magnet 13,1
Since the magnetic shielding plate 4 is interposed between the reed switch 8.10.16 and the reed switch 8.10.16, the reed switch 8.10.11 is turned off as described above.

In other words, ■ and III corresponding to the displayed number O as shown in the fourth diagram.
is ON.

Next, when the number wheel 3 is rotated one step (=36°) in the direction of the arrow from the operating state shown in FIG. 6 above, the reed switch is Explain the operation.

As described above, the magnetic shielding plate 4 is divided into 10 equal parts, and two continuous sections A and B are removed to form a notch 41. Also, leave the next 1 section C and remove the next 1 section to create a notch 42 and the next 2 sections E.
, F is left and the next section G is removed to provide a notch 43. Therefore, when the number wheel 3 rotates one step in the direction of the arrow from the state shown in Figure 6 to display the number 1, ,
The reed switch 7 continues to be in the ON state because it continues to face the notch 41 as shown in FIG. 7A.

When the number wheel 3 rotates two steps in the direction of the arrow from the state shown in Fig. 6 and displays the number 2, the reed switch 7 faces the magnetic shielding plate 4 as shown in the opening of Fig. 7, so it changes from ON to OFF.
Changes to F state.

When the number wheel 3 rotates three steps in the direction of the arrow from the state shown in FIG. 6 to display the number 3, the reed switch 7 faces the notch 42 as shown in FIG.
Changes to N state.

When the number wheel 3 rotates 4 steps in the direction of the arrow from the state shown in FIG. 6 and displays the number 4, the reed switch 7 faces the magnetic shielding plate 4 as shown in FIG.
Changes to F state.

When the number wheel 3 rotates 5 steps in the direction of the arrow from the state shown in the sixth figure to display the number 5, the reed switch 7 continues to be in the OFF state as it continues to face the magnetic shielding plate 4 as shown in the seventh figure. be.

When the number wheel 3 rotates six steps in the direction of the arrow from the state shown in FIG. 6 and displays the number 6, the reed switch 7 faces the notch 43 as shown in FIG.
Changes to N state.

When the number wheel 3 rotates 7 steps in the direction of the arrow from the state shown in Fig. 6 to display the number 7, the reed switch 7 faces the magnetic shielding plate 4 as shown in Fig. 7, so it changes from ON to OFF.
Changes to F state.

During the subsequent two-step rotation, the reed switch 7 continues to be opposed to the magnetic shielding plate 4 as shown in FIGS.

That is, the reed switch 7 is turned on when the displayed number is Oll, 3.6, as shown in the first line of FIG.

Since the reed switch 8 is arranged at an angle of 72° (=2 steps) in the rotational direction of the number wheel 3 with respect to the reed switch 7, it has the same facing relationship as the reed switch 7 has with the magnetic shielding plate 4. You will have to take it two steps later.

That is, as shown in line II of FIG. 4, the displayed numbers are 2.3.5.
When it is 8, it becomes ON state.

Since the reed switches 7.8°, 9, 10, and 11 are arranged sequentially at intervals of 72° (=2 steps),
In the same manner as above, the reed switch 9 is set to the display number 4.5.7.1 and the reed switch 1 as shown in line III of FIG.
0 is the display number 6.7.9.2 as shown in line IV of Figure 4.
, the reed switches 11 are turned on when the taught numbers are 8, 9, and 1.4, as shown in row V in FIG. 4, and two of the five reed switches are turned on as shown in FIG. 1 corresponding to the displayed number from O to 9 as the state
0 types of output codes, that is, 5C2 output codes can be obtained.

As mentioned above, with this invention, the number of permanent magnets can be dramatically reduced compared to conventional products, and rotating parts can be isolated by simply fixing one magnetic shield plate 4 to the number wheel 3. It is possible to obtain a high-performance, highly reliable readout counter that is lightweight and simple in structure, can be operated with a small amount of input, has a fast response time, and is unlikely to stop functioning due to parts falling off.

In the above embodiment, five permanent magnets were arranged for five reed switches, but in this invention, the permanent magnets do not have to be attached to the rotating body g, so there are restrictions in terms of weight. Therefore, for example, one large permanent magnet that can turn on all of the five reed switches may be provided to face all of the five reed switches to further simplify the structure.

In addition, in the above explanation, a configuration was shown in which a 5C2 output code is obtained by an ON signal, but by reversing the notch and the non-notch part of the magnetic shielding plate, a 5C2 output code is obtained by an OFF signal. also has the same effect.

[Brief explanation of drawings]

Figures 1 to 7 show an embodiment of this invention. Figures 1 and 2 are front and back plan views showing the drive unit, respectively, and Figure 3
The figure is an explanatory diagram showing the shape of the magnetic shield plate, Fig. 4 is a 5C2 output code table obtained by the readout counter of this invention, Figs. 5 and 6 are explanatory diagrams, and Fig. 7 is an illustration. FIG. 8 is a front view of a conventional readout counter, and FIG. 9 is a 5C2 output code table thereof. In the figure, 1 is an electromagnet, 2 is a transmission lever, 3 is a number wheel, 4 is a magnetic shield plate with notches (control part) 41, 42, 43, 7,
8゜9.10.11 is reed switch, 12.13,1
4, 15, and 16 are permanent magnets. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] A number wheel with numbers 0 to 9 attached to each position of the outer circumference divided into 10 equal parts, 5 switches arranged at equal intervals on the same circumference,
A biasing means for these switches, and a control board that rotates together with the number wheel between the biasing means and the switch to turn on and off the five switches, and the control board corresponds to the numbers. It has 10 areas, and in each of these areas, two consecutive areas, one area separated from this area, and another area separated by two areas from this area. , one switch is selectively activated from the five switches, and the five switches correspond to the numbers on the number wheel. A readout counter characterized in that it obtains a C2 (combination) output code.