JPS5840657Y2 - Readout counter - Google Patents

Description

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

Conventionally, when a reed switch is used to obtain a 5C2 (combination) output code in a slide-out counter that takes 10 steps (from O to 9) in one revolution, it has been constructed as shown in FIG.

That is, five pulse generating reed switches I.

II, III, IV, and V, and 5 rows of permanent magnet groups for operating each of the above-mentioned reed switch During 10 steps and 1 rotation, each reed switch I~■ operates 4 times, resulting in different 1 rotation as shown in Figure 9.
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 the reed switches I to I are arranged in a row of eight permanent magnets to operate each of the reed switches I to I. 40 pieces in 5 rows were required.

Therefore, in order to prevent the permanent magnet groups in each row from causing magnetic interference with other rows, it is necessary to provide a large interval between each row, 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 the disadvantage that its rotational ability is reduced.

Furthermore, it is very difficult to securely and inexpensively fix as many as 40 permanent magnets to a rotating body, so some of the permanent magnets may fall off due to vibrations or shocks during rotation of the rotating body, causing the readout counter to stop functioning. It also had drawbacks such as confusion.

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 weighed value.

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

These notches 41 and 42 are used to cut the disc into 1 of A-J as shown in the third figure.
It is formed by dividing it into 0 equal parts and removing parts A, B, and E.

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 so as to sandwich the rotation path of the notches 41 and 42 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 is completely closed.
When the reed switch is turned off by shielding the magnetic flux acting on the reed switch with 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 reed switch and the permanent magnet Notch 41 of magnetic shielding plate 4 between
, 42 correspond, the magnetic flux of the permanent magnet acts on the reed switch to turn it on.

FIG. 4 is a 5C2 output code table 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 among the numbers from ■ to V, is reed switch 7, II is reed switch 8, I
II is reed switch 9, IV is reed switch 10,
(2) indicates the reed switch 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 indicates ■ and IV, that is, the reed switches 7 and 10 are ON, and the other reed switches 8, 9, 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 42 of the magnetic shielding plate 4 are opposed to the reed switches 7 and 10, respectively, and are turned on by the permanent magnets 12 and 15, respectively, as described above.

On the other hand, reed switches 8, 9, 11 and permanent magnets 13, 14
．． Since the magnetic shielding plate 4 is interposed between the reed switches 8 and 16, the reed switches 8, 9, and 11 are OFF, as described above.

That is, as shown in the fourth figure, ■ and IV corresponding to the displayed number O are turned on.

Next, the number wheel 3 is rotated one step (-36°) in the direction of the arrow from the operating state shown in FIG. Explain the operation.

As mentioned above, the magnetic shielding plate 4 is divided into 10 equal parts, two consecutive sections A and B are removed and the notch 41 is left, and the next two sections E are removed leaving the next section C. However, when the number wheel 3 rotates one step in the direction of the arrow from the state shown in FIG. 6 and displays the number I, the reed switch 7 remains as shown in FIG. 7A. Although it continues to face the notch 41, it continues to be in the ON state.

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 is turned from ON to OFF while facing the magnetic shielding plate 4 as shown in the opening of Fig. 7.
Changes to F state.

When the number wheel 3 rotates three steps in the direction of the arrow to display the number 3 in the state shown in Figure 6, the reed switch 7 faces the notch 42 as shown in Figure 7C, so it changes from OFF to ON 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 continues to be in the ON state because it continues to face the notch 42 as shown in FIG. .

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 is turned from ON to OFF while facing the magnetic shielding plate 4 as shown in the seventh figure.
Changes to F.

Thereafter, during the four-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 opens and closes twice in total when the displayed number changes from 9 → 01 → 22 → 34 → 5 in 10 steps, and the displayed number changes to
It becomes ON state when l, 3.4.

Reed switch 8 is number wheel 3 relative to reed switch 7
Since the reed switch 7 is arranged with an angle of 72 degrees (=2 steps) in the rotational direction of the reed switch 7, the same opposing relationship as the reed switch 7 has with the magnetic shielding plate 4 is obtained with a delay of two steps.

That is, as shown in line II of Figure 4, the displayed numbers are 2.3.5.
．． When it is 6, it becomes ON state.

The reed switches 7.8, 9, and 10.11 are each sequentially arranged at intervals of 72° (=2 steps), but in the same way as above, the reed switch 9 has the display number 4 as shown in line III of FIG. .5.7.8, reed switch 1° has a display number 6.7.9J as shown in line IV in Figure 4, and reed switch 11 has a display number 8 as shown in line V in Figure 4.
．． 9, ■, and 2, respectively, and as shown in Fig. 4, two of the five reed switches are turned on, and 10 types of output codes corresponding to the displayed numbers from 0 to 9 are output. , 5C2 output code 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 to configure, 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 are arranged for five reed switches, but in this invention, the permanent magnets do not need to be attached to the rotating body, so there are restrictions in terms of weight. For example, the structure may be further simplified by providing one large permanent magnet that faces all of the five reed switches and is capable of turning on all of the reed switches.

Note that although the above explanation shows a configuration for obtaining a 5C2 output code using an ON signal, the same result can be obtained by reversing the notch of the magnetic shielding plate and the portion that cannot be cut out to obtain a 5C2 output code using an OFF signal. It has the following effects.

[Brief explanation of drawings]

Figures 1 to 7 show an example of this invention.
Figures 1 and 2 are front and back plan views showing the drive section, Figure 3 is an explanatory diagram showing the shape of the magnetic shield plate, and Figure 4 is the 5C2 output code obtained by the readout counter of this invention. Figures 5 and 6 are explanatory diagrams, Figure 7 is an explanatory diagram of its operation, Figure 8 is a front view of a conventional readout counter, and Figure 9 is its 5C2 output code. There is a table. In the figure, 1 is an electromagnet, 2 is a transmission lever, 3 is a number wheel, 4 is a magnetic shield plate with notch control parts 41, 42, 7, 8, 9, 1
0°11 is a reed switch, 12.13, 14, 15.
16 is a permanent magnet. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A number wheel with a number from O 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 zones, and one switch from the above five switches is installed in each of two consecutive zones among these zones and another two consecutive zones separated by one zone. A readout counter characterized in that it is configured to be selectively operated and to obtain a 6C2 (combination) output code corresponding to the number on the number wheel from the five switches.