JPH0448612Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an energization display device for a time switch, which is provided in a clock-type time switch whose driving source is a motor, so that the state of energization to the motor can be confirmed. .

[Background Art] Conventionally, clock-type time switches that use a motor as a drive source include those that use a synchronous motor that rotates in synchronization with the commercial power frequency (hereinafter referred to as synchronous motor type), and those that use a crystal vibration type as a drive source. There is a type (hereinafter referred to as a quartz type) whose drive source is a step motor that rotates with the output of an oscillator that oscillates at a constant frequency.

When performing a energization indication on a synchronous motor type, by inserting a rectifier diode and a light emitting diode in series with the motor coil, and arranging the rectifier diode and lightning surge absorbing components on the printed wiring board, the light emitting diode can be used as an energization indication. However, this method has the problem of increasing the number of parts and increasing costs. Therefore, a method is to use the sufficiently large torque of the synchronous motor that is the drive source to mesh another gear with an appropriate gear in the reduction gear group, and use the rotation axis of this gear as the operation display axis. It is considered. That is, by rotating the operation display shaft at a predetermined rotational speed, the rotation can be visually confirmed, and the energization display can be confirmed with a relatively simple configuration.

On the other hand, the quartz type is often driven in steps with pulses having a period of 1 second, so the rotation speed is slow (30 rpm in the case of two poles). Therefore, it is difficult to confirm the rotational state, and since the torque is small, it is often impossible to provide a separate gear to indicate energization. On the other hand, the quartz type is equipped with a pulse generation circuit to drive the step motor, so if you insert a light emitting diode at an appropriate location in the circuit, you can easily check whether the light is energized by blinking the light emitting diode. can.

As described above, the synchronous motor type and the quartz type have different methods of indicating energization, and conventionally, it has been impossible to share the case.

[Purpose of the invention] The present invention has been made in view of the above points, and its purpose is to create a case that is compatible with both synchronous motor type and quartz type energization indicators. It is an object of the present invention to provide an energization display device for a time switch that allows common use of parts by using the present invention.

[Disclosure of the invention] (Structure) The energization display device for a time switch according to the invention has a dial that rotates once in a predetermined time by using a motor as a drive source and decelerating it through a movement, and the rotation angle of the dial is changed over time. A time switch configured to time-limit in accordance with
An energization display window is drilled at a suitable location in the case, and the rotation of the motor is transmitted between a holding hole formed in the lower frame and a holding tube formed in the upper frame at a portion corresponding to the energization display window. It is possible to hold an operation display shaft that allows rotational movement to be visually confirmed through the energization display window, and inside the holding cylinder, there is a light emitting diode that is connected to the motor control circuit and comes in contact with the end face on the base side of the light emitting diode that allows you to check the energization state of the motor. A holding protrusion capable of holding a light emitting diode is formed, and one of the operation display shaft and the light emitting diode is arranged in correspondence with the energization display window, and the light emitting diode and the operation display are arranged in the energization display window. By allowing it to be placed either with the shaft, it is compatible with both synchronous motor type and quartz type energization indications.

(Embodiment) FIGS. 1 to 4 show a quartz type time switch, in which a movement 20 is housed in a case 10. Case 10 is
Body 11 can now be mounted on a DIN rail,
It consists of a cover 12 that is fitted onto the body 11.
A terminal portion 13 is formed on the side surface of the case 10, and a setting dial 31, a minute setting knob 32, and a mode setting knob 33 protrude from the top surface of the case 10.
An energization display window 34 is formed.

As shown in FIG. 4, the movement 20 includes a motor cover 21a, a motor base plate 21b, a stator 21c, a coil 21d, and a rotor 21 with a number 1 pinion.
The drive source is a step motor 21 consisting of
After being decelerated by a group of reduction gears made up of gears from the No. 7 gear 22a to the No. 7 gear 22f, the dial 31 meshing with the No. 7 gear 22f is rotated. A pinion shaft 22g meshes with the internal gear of the No. 6 gear 22e to form a ratchet mechanism, and the above-mentioned setting 32 knob is attached to the pinion shaft 22g. The reduction gear group is mounted between a lower frame 14 and an upper frame 15 which are vertically spaced apart from each other at a fixed position within the case 10, and the step motor 21 is mounted to the lower frame 14. However, the step motor 21 is driven by the output of the drive circuit 23, and the dial 31 is rotated via the reduction gear group. dial 31
The setter 36 can be detachably attached to a suitable position on the circumference. A detection lever 24 is rotatably mounted on the upper frame 15 at a portion corresponding to the setting element 36, and when the setting element 36 kicks the detection lever 24 as the dial 31 rotates, the detection lever 24 is moved in conjunction with the detection lever 24. The drive arm 25 operates the actuator 26a of the micro switch 26 to reverse the open/closed state of the micro switch 26. Therefore, by attaching the setter 36 to an appropriate position, the output state of the microswitch 26 can be changed at a desired timing. A switching cam 35 is interlocked with the mode setting knob 33.

By the way, as shown in FIG. 1, the upper frame 15 has a holding cylinder 16 protruding at a portion corresponding to the energization display window 34 formed on the top surface of the case 10. Holding protrusions 17 are formed at appropriate locations on the surface over the entire circumference. Further, in the lower frame 14, a holding hole 18 is formed directly below the holding cylinder 16. Here, the inner diameter of the holding cylinder 16 is such that a light emitting diode 37 that blinks based on an appropriate output from the drive circuit 23 can be attached. The inner diameter of the holding protrusion 17 is set so that the periphery of the base of the light emitting diode 37 comes into contact with the holding protrusion 17 .

On the other hand, in a synchronous motor type time switch, as shown in FIGS. 5 and 6, an operation display shaft 28 is rotated by one gear in a group of reduction gears via an idler 27. The operation display shaft 28 is supported at both ends by the holding hole 18 of the lower frame 14 and the holding tube 16 of the upper frame 15. A convex mark 38 as shown in FIG. 1b is formed on the upper end surface of the operation display shaft 28, and it can be confirmed that the convex mark 38 rotates as the operation display shaft 28 rotates, and that the motor is energized. It is. Here, the synchronous motor 41 is the step motor 2
Lower frame 1 rotates faster than frame 1.
4 and the synchronous motor 41, the gears 22h to 22j are arranged so that a larger reduction ratio of the reduction gear group can be obtained than in the case of the quartz type.
are increasing the number of Also, since it is a synchronous motor 41, it can respond to changes in power frequency.
A gear ratio can be changed by a switching shaft 42.

If one of the gears in the reduction gear group is used as the operation display shaft 28, there is no need to separately provide the idler 27 and the operation display shaft 28, and costs can be reduced.

As described above, for both the synchronous motor type and quartz type, the case 10 and the lower frame 1 are
4. This has the advantage that parts such as the upper frame 18, dial 31, and reduction gear group can be shared.

[Effects of the invention] As mentioned above, the invention has a dial that rotates once in a predetermined time by using a motor as a drive source and decelerating through a movement, and time is determined by making the rotation angle of the dial correspond to the time. This type of time switch has a case in which the motor and movement are housed, a lower frame and an upper frame which are housed in fixed positions within the case and hold the movement, and an energization display window is provided at an appropriate location in the case. The rotation of the motor is transmitted between the holding hole formed in the lower frame and the holding tube formed in the upper frame at the part corresponding to the energization display window, and rotational movement is performed through the energization display window. A visible operation display shaft can be held, and a holding protrusion inside the holding cylinder that can hold the light emitting diode by contacting the end face of the base side of the light emitting diode, which is connected to the motor control circuit and allows checking the energization state of the motor. A strip is formed, and one of the operation display axis and the light emitting diode is arranged in correspondence with the energization display window, and both the light emitting diode and the operation display axis are exposed in the energization display window. Since it is designed to be able to do this, it is compatible with both synchronous motor type and quartz type energization indicators, and has the advantage that parts such as the case, upper frame, and lower frame can be shared.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts showing an embodiment of the present invention;
Figure 2 is an external perspective view of the same as above, Figure 3 is a sectional view of the same as above, Figure 4 is an exploded perspective view showing the movement used in the same, and Figures 5 a and b show other usage examples of the same as above. Cross-sectional view of main parts and front view of energization display window,
FIG. 6 is a partially exploded perspective view showing the movement in another example of use similar to the above. 10 is a case, 14 is a lower frame, 15 is an upper frame, 16 is a holding cylinder, 17 is a holding protrusion, 18 is a holding hole, 28 is an operation display shaft, 31 is a dial, 3
4 is an energization display window, and 37 is a light emitting diode.

Claims (1)

[Scope of utility model registration request] A time switch that has a dial that rotates once in a predetermined time by using a motor as a drive source and decelerating it through a movement, and sets a time limit by making the rotation angle of the dial correspond to the time.
a case in which the motor and movement are housed;
It has a lower frame and an upper frame that are housed in a fixed position in the case and hold the movement, and an energization display window is bored in the appropriate place of the case, and a part corresponding to the energization display window is formed on the lower frame. Between the holding hole and the holding tube formed in the upper frame, an operation display shaft can be held that transmits the rotation of the motor and allows the rotational movement to be seen through the energized display window. A holding protrusion is formed that can hold the light emitting diode by coming into contact with the end face on the base side of the light emitting diode, which is connected to the circuit and can confirm the energization state of the motor. A time switch energization display device arranged to correspond to a window.