JPS5840661Y2 - Pulse hatsei sochi - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a pulse generator such as a reading device (readout counter) with a pulse generator.

Conventionally, for example, in a readout counter that takes 10 steps (from O to 9) in one rotation, 5C2 (combination)
When a reed switch was used to construct a pulse generator capable of producing an output code, it was constructed as shown in Figure 8.

That is, five pulse generation reed switches I, II, I
Place II, IV, and ■, and press each of the above REIT switches ■ to V.
In order to operate, five independent rows of permanent magnets are mounted on a rotatable disc by adhesive or other means.
While the disk takes 10 steps and makes one rotation, each reed switch ■~■ operates four times, resulting in a different one as shown in Figure 8B.
It was configured so that output codes with 0 types of combinations could be obtained.

However, according to the conventional pulse generator configured as described above, the number of permanent magnets for operating reed switches IV is 8 and 1 for operating each reed switch ① to V.
A total of 40 permanent magnet groups in five rows were required.

Therefore, in order to prevent the permanent magnet groups in each row from magnetically interfering with other rows, it is necessary to provide a large interval between each row, which has the disadvantage of increasing the size of the pulse generator.

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

The purpose of this invention is to eliminate the drawbacks of the conventional products as described above, and one embodiment of this invention will be described in detail below with reference to the drawings.

That is, in FIGS. 1 to 5, 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 to drive the number wheel 3 in the direction of the arrow.

Numbers 0 to 9 are written on the outer periphery of the number wheel 3, and the display window 4 displays the numbers according to the weighed value.

5°6.7 is a permanent magnet for operating the reed switch, and 5 and 6 are 90° and 6 are located on almost the same radius of the number wheel 3.
and 7 are mounted at an angle of 108°.

8, 9, 10° 11.12 are well-known single-pole, single-throw, normally open reed switches arranged at 72° intervals and close to and facing the rotation path of the permanent magnets 5, 6.7. ing.

Here, the general operation of a reed switch will be explained based on Fig. 6. When the separation angle from the permanent magnet is large, for example, in the corresponding state shown in Fig. 6 A, the reed switch is turned OFF.
However, when the separation angle becomes smaller, for example, by rotating the permanent magnet in the direction of the arrow from the state shown in Fig. 6A,
When the state shown by the mouth is reached, it changes from OFF to ON.

Once the reed switch is turned ON, it will not go to 0FFL unless it is moved further away from the ON position.

Therefore, when the permanent magnet is further rotated in the direction of the arrow from the state shown at the opening in FIG. 6, when it reaches the state at the separation angle B shown by 8, which is larger than the separation angle A of the opening, it changes from ON to OFF.

That is, when the magnet is rotated as shown in Figure 6, the ON range of the reed switch is A+B, and this ON range can be selected to an appropriate range by selecting the sensitivity of the reed switch, the magnetic force of the magnet, etc. It is.

In this invention, permanent magnets 5, 6.7 and each reed switch 8
The sensitivity of each reed switch 8 to 12 is set permanently so that when the proximity angle between the reed switches 8 to 12 is within 18 degrees, the reed switches 8 to 12 go from OFF to ON, and when the proximity angle becomes 36 degrees or more, the reed switches 8 to 12 change from ON to OFF. The magnetic force of magnets 5, 6, and 7 is selected.

FIG. 3 is obtained by the pulse generator of this invention.

In the C2 output code table, the numbers 0 to 9 are the numbers displayed by the number wheel 3 on the display window 4, and among ■ to V, ■ is reed switch 8, II is reed switch 9, JII is reed switch 10, and IV is the reed switch 11. (2) indicates the reed switch 12, respectively.

The symbol ON in the table indicates that reed switches 8 to 12 are turned on.

That is, for example, when the number wheel 3 is displaying 0, it means that I and III, that is, reed switches 8 and 10, are ON, and the other reed switches 9, 11, and 12 are OFF. .

Next, the operation of the pulse generator according to the invention constructed as above will be explained.

That is, FIGS. 4 and 5 show the state when the number wheel 3 is rotating in the direction of the arrow and the number wheel 3 is displaying the number 0.

In this state, the permanent magnets 5 and 7 are facing the reed switches 8 and 10 at a proximity angle of 18° and Oo, respectively, and the reed switches 8 and 10 are turned on by the permanent magnets 5 and 7, respectively, as described above. .

On the other hand, the permanent magnet 6 is located at the center of the reed switches 11 and 12, and faces both of the reed switches 11 and 12 at a close angle of 36 degrees, so as described above, both reed switches 11 and 12 are turned off. are doing.

Reed switch 9 is OFF even though it does not have permanent magnet support.
are doing.

Therefore, as shown in the third diagram, ■ and II correspond to the displayed number O.
I is ON.

Next, from the operating state shown in Figure 5, move the number wheel 3 one step (=
The operation of the reed switch will be explained based on the transition of the facing state of the reed switch 8 and the permanent magnets 5, 6.7 when the reed switch 8 is rotated by 36°) in the direction of the arrow.

When the number wheel 3 rotates one step in the direction of the arrow to display the number 1 from the state shown in Figure 5, the reed switch 8 faces the permanent magnet 5 at a proximity angle of 18° as shown in Figure 7A. However, the ON state continues as above.

When the number wheel 3 rotates two steps in the direction of the arrow to display the number 2 in the state shown in Figure 5, the reed switch 8 has a close proximity angle between it and the nearest permanent magnet 6 as shown in Figure 7. is 36°, so it changes from ON to OFF.

When the number wheel 3 rotates 3 steps in the direction of the arrow from the state shown in FIG. 5 and displays the number 3, the reed switch 8 corresponds to the permanent magnet 6 at a proximity angle of 0° as shown in FIG. 7, so it is turned OFF. It becomes more ON.

When the number wheel 3 rotates 4 steps in the direction of the arrow from the state shown in FIG. 5 to display the number 4, the reed switch 8 is at a close angle with the nearest permanent magnet 6 as shown in FIG. Although the angle is 36°, it changes from ON to OFF.

When the number wheel 3 rotates 5 steps in the direction of the arrow from the state shown in the fifth figure to display the number 5, the reed switch 8 has a proximity angle of 36 with the nearest permanent magnet 7 as shown in the seventh figure. °, but it continues to be in the OFF state.

When the number wheel 3 rotates six steps in the direction of the arrow from the state shown in FIG. 5 and displays the number 6, the reed switch 8 corresponds to the permanent magnet 7 at a proximity angle of 0° as shown in FIG. It changes from OFF to ON as it becomes.

When the number wheel 3 rotates 7 steps in the direction of the arrow from the state shown in Fig. 5 and displays the number 7, the angle of proximity with the nearest permanent magnet 7 is 36°, so it is more likely to turn from ON to OF.
Changes to F.

During the subsequent two-step rotation, the reed switch 8 is rotated at an angle of 18° for both permanent magnets 5, 6, and 7, as shown in FIG.
Since there is no close opposition below, the OFF state continues.

That is, the reed switch 8 is turned on when the displayed number is 0.1.3.6 as shown in line I in FIG.

Reed switch 9 is number wheel 3 relative to reed switch 8
Since the reed switch 8 is arranged at an angle of 72° (=2 steps) in the rotational direction of the reed switch 8, the reed switch 8 takes the same opposing relationship with the permanent magnets 5, 6, and 7 with a delay of 2 steps.

That is, as shown in line II of Figure 3, the displayed numbers are 2.3.5.
．． When it is 8, it becomes ON state.

Since the reed switches 8, 9, 10, 11, and 12 are sequentially arranged at intervals of 72° (=2 steps), the reed switch 10 is set to III in FIG.
Display numbers 4.5.7.0 reed switch 1 as shown in rows
1 is the display number 6.7.9.2 as shown in line IV of Figure 3.
The node switches 12 are in the ON state when the displayed numbers are 8, 9, 1, and 4, respectively, as shown in the V line in FIG.
As shown in the diagram, two of the five reed switches are turned on and the number 1 corresponding to the displayed number from 0 to 9 is set.
It is possible to obtain 0 types of output codes, that is, 5C2 output codes.

As mentioned above, in the pulse generator of this invention, the 5C2 output code can be obtained by providing the permanent magnets 5, 6, and 7 that commonly correspond to the five reed switches 8 to 12. The number of permanent magnets can be dramatically reduced compared to conventional products, and since there is no magnetic interference between the permanent magnets, a compact and easy-to-manufacture pulse generator can be obtained.

Furthermore, since the rotor is light, a pulse generator with excellent characteristics, which can be operated with a small number of inputs and has a fast response speed, can be obtained.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of this invention; Figure 1 and Figure 2 are front and back plan views showing the drive section, respectively;
The figure shows 5C2 obtained by the pulse generator of this invention.
Output code table, Figures 4 and 5 are explanatory diagrams of the pulse generator, Figure 6 is an explanatory diagram of the general operation of a reed switch, and Figure 7 is an explanatory diagram of the general operation of a reed switch.
8A and 8B are a front view and an output code table of a conventional pulse generator. In the figure, 1 is an electromagnet, 2 is a transmission lever, 3 is a number wheel, 4 is a display window, 5, 6.7 are permanent magnets, 8, 9, 10, 11.
12 is a reed switch. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] Numbers O to 9 are placed on the outer circumference at equal intervals, and the number wheel is rotated 36 degrees in one step by a drive signal.
three permanent magnets fixedly attached to the number wheel at intervals of , reeds that are arranged opposite to the permanent magnets at equal intervals of 72° and whose opening and closing are controlled by the permanent magnets as the number wheel rotates; A switch is provided, and when the number wheel is rotated, each reed switch is in an operating state in two successive states out of the ten states taken during one rotation of the number wheel, and the next one is in an inactive state, The next 1 state is in the operative state, the next 2 consecutive states are in the non-operative state, the next 1 state is in the operative state, and the following 3 consecutive states are in the non-operative state. A pulse generator configured to obtain a 5C2 output code corresponding to the number on the number wheel from a switch.