JP2003051233A - Analog timer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an analog timer, in which using conveniences are superior and in which on/off of the timer output is switchable at a prescribed position of a time setting knob, when the timer is set at a test mode. SOLUTION: This timer is provided with an oscillation circuit 11, a divider circuit 12, a count/control part 13, an output circuit 14, and a knob position detecting part 15, and at setting of the test mode, sequence action or the like of the external equipment is checked by switching the on/off of the timer output T0 at the prescribed position (0 position of graduation) for the time setting knob 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an analog timer which outputs a timer output by measuring a time set by a time setting knob, and more particularly, when the test mode is set, the time setting knob supplies the timer output with a power source at a predetermined position. The present invention relates to an analog timer that can be switched on / off without being turned off.

[0002]

2. Description of the Related Art A conventional timer is disclosed in Japanese Patent No. 30 of the present applicant.
As disclosed in Japanese Patent No. 64481, when a timer time is set to zero, an instantaneous output (timer output) is generated,
It is known that a sequence operation check of a device using a timer can be performed in a short time.

[0003]

In the conventional timer, when the timer time is set to zero, an instantaneous output (timer output) is generated, and the sequence operation check of the equipment using the timer can be performed quickly. Even if you try to operate the timer normally by stopping (timer output), the momentary output (timer output) is still held (latched). However, there is a problem in that it is cumbersome and inconvenient because it is necessary to externally supply a reset signal or to turn off the driving power of the timer and then to turn on the driving power again.

The present invention has been made to solve the above problems, and its purpose is to turn on / off the timer output at a predetermined position of the time setting knob when the test mode is set.
It is to provide an easy-to-use analog timer that can be switched off.

[0005]

In order to solve the above problems, an analog timer according to the present invention is an analog timer which outputs a timer output at a predetermined position of a time setting knob, and which has a test mode function in addition to a timer operation mode function. When the test mode is set, the timer output is turned on / off at a predetermined position of the time setting knob.

The analog timer according to the present invention has a test mode function, and when the test mode is set, the timer output is switched on / off at a predetermined position of the time setting knob, so that the time setting knob is set to the predetermined position. The timer output (instantaneous output) will be output when combined, and the timer output (instantaneous output) can be stopped by moving the time setting knob out of the specified position, eliminating the need for complicated operations such as latch release.
It is possible to improve usability.

Further, the timer output according to the present invention is characterized in that it can be turned on / off without turning off the power.

Since the timer output according to the present invention can be turned on / off without turning off the power source, the timer output (instantaneous output) can be easily used without requiring a complicated operation such as latch release.

Further, the on / off switching of the timer output according to the present invention is characterized in that the time setting knob is near the 0 position of the scale.

In the timer output on / off switching according to the present invention, since the time setting knob is near the 0 position of the scale, the timer output (instantaneous output) is performed by the same operation as the conventional timer.
Can be generated, and it is not necessary to release the latch without changing the operation, so that the convenience can be improved.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a surface appearance view of an analog timer according to the present invention. In FIG. 1, the analog timer 1 includes a mode switching unit 2, a unit switching unit 3, a scale number switching unit 4, a time setting knob 5, a scale display unit 6, a unit display unit 7, an output display unit 8, an operation / energization display unit. 9 and a mode display unit 10.

The mode changeover unit 2 is composed of a changeover switch, and a plus (+) or minus (-) driver is inserted and rotated to change the mode display of the mode display unit 10 to the timer operation mode or the test mode.

The unit switching unit 3 is composed of a changeover switch,
Insert a plus (+) or minus (-) driver and rotate it to display the time display on the unit display 7 as "sec:
"Second", "min: minute", "hrs: hour", "10h:
10 hours ".

The scale number switching unit 4 is composed of a changeover switch, and a plus (+) or a minus (-) driver is inserted and rotated, and the effective display of the scale display unit 6 is set to "1",
Switch to "2", "3", "12", "30".

The time setting knob 5 is arranged concentrically with the graduation display section 6, and is rotated clockwise to point the set time (number) of the graduation display section 6 with an indicator needle to set the timer time.

The output display section 8 is composed of a visible display such as an LED (light emitting diode), and lights up when the analog timer 1 reaches a set time to display that the timer output is being output.

The operation / energization display unit 9 is composed of a visible display such as an LED (light emitting diode), and blinks when the timer is operating, and lights when the timer is stopped to display the state of the timer.

In the analog timer 1, the mode switching section 2 is set to the test mode, and the time setting knob 5 is operated to move the pointer to the vicinity of the scale 0 position on the scale display section 6 (black band display: ON).
Moving to, the timer output (instantaneous output) is generated regardless of the time display setting of the unit display section 7 and the effective display setting of the scale number switching section 4.

On the other hand, the analog timer 1 outputs a timer output (instantaneous output) when the time setting knob 5 is operated to move the pointer to a position outside the vicinity of the scale 0 position (black band display: ON) on the scale display portion 6. Stop.

Generation (ON) and stop (OFF) of the timer output (instantaneous output) in the test mode are performed by operating the time setting knob 5 with the power supply for driving the analog timer 1 being applied. You can

FIG. 2 is a block diagram of the essential parts of an embodiment of an analog timer according to the present invention. In FIG.
The analog timer 1 includes an oscillation circuit 11, a frequency dividing circuit 12, a counting / control unit 13, an output circuit 14, and a knob position detecting unit 15.
Equipped with. The test mode function is composed of the mode switching section 2, the time setting knob 5, the knob position detecting section 15 and the output circuit 14.

The oscillator circuit 11 is composed of a pulse generator circuit such as a crystal oscillator, generates a clock pulse whose frequency changes depending on the position of the time setting knob 5, and supplies the clock pulse to the frequency divider circuit 12. The frequency of the clock pulse is set to be inversely proportional to the set time.

Further, the oscillation circuit 11 is provided with a control circuit for controlling the generation or stop of the clock pulse, generates the clock pulse when the mode switching unit 2 is in the timer operation mode, and the mode switching unit 2 is in the test mode. If so, stop the clock pulse.

The frequency dividing circuit 12 is composed of a frequency dividing circuit such as a counter, and the clock pulse supplied from the oscillating circuit 11 is supplied from the unit time and knob position detecting section 15 switched by the unit switching section 3 shown in FIG. The frequency is divided into the frequency corresponding to the position signal to be counted, and the divided pulse signal is counted / control unit 1
Supply to 3.

The counting / control unit 13 is composed of a counter or the like, counts the pulse signal supplied from the frequency dividing circuit 12,
When the count value reaches the time set in advance by the time setting knob 5 shown in FIG. 1, for example, an H level timer signal is supplied to the output circuit 14.

The output circuit 14 is composed of a relay drive circuit, a relay, etc., and drives the relay drive circuit based on a timer signal supplied from the counting / control section 13 to drive the relay, and the time setting knob 5 is used. When the set time has elapsed, timer output To is output.

The output circuit 14 drives the relay by driving the relay drive circuit based on the test signal SD supplied from the knob position detector 15 when the mode switching unit 2 is set to the test mode. , Timer output (instantaneous output) To is output.

The knob position detecting section 15 is composed of a variable resistor, a comparator and the like which are interlocked with the time setting knob 5, and corresponds to the knob position of the time setting knob 5 when the mode switching section 2 is set to the test mode. The position voltage is compared with the reference voltage, and the test signal SD is supplied to the output circuit 14 according to the comparison result.

FIG. 3 is a block diagram of the essential parts of an embodiment of the knob position detector according to the present invention. In FIG. 3, the knob position detecting section 15 has a power supply voltage VC and a ground (G
ND) resistor R1, variable resistor (volume) RV
Also, the resistor R2 is connected in series, and the variable resistor (volume) RV is interlocked with the time setting knob 5 to detect the knob position by the position voltage VD.

Further, the knob position detecting section 15 comprises a comparator 16 for comparing the position voltage VD with the reference voltage VR,
When the position voltage VD is lower than the reference voltage VR (VD <VR), the H level test signal SD is supplied to the output circuit 14.

On the other hand, the comparator 16 detects the position voltage VD
Is above the reference voltage VR (VD ≧ VR), the L-level test signal SD is supplied to the output circuit 14.

The reference voltage VR is the position voltage VD detected when the pointer (knob position) of the time setting knob 5 is set at the position of the scale 0 on the scale display section 6.

As described above, the knob position detector 15 includes the variable resistor RV and the comparator 16, and the position voltage VD and the reference voltage VR corresponding to the set position of the time setting knob 5 are set.
And the test signal SD is generated based on the comparison result. Therefore, the timer output (instantaneous output) To can be generated by operating the time setting knob 5 without turning off the analog timer 1.
Can be turned on / off, and a complicated operation such as latch release is not required, and usability can be improved.

FIG. 4 is an output characteristic diagram of the knob position detector according to the present invention. In FIG. 4, when the knob position of the time setting knob 5 is increased from the scale 0 side of the scale display portion 6, the resistance value of the variable resistor RV shown in FIG. 3 is increased and the position voltage VD is also increased. When the reference voltage VR set at the position 0 (indicated by the solid line arrow) is reached, the test signal SD transits from the H level to the L level.

As described above, when the knob position of the time setting knob 5 is 0 or less on the scale display portion 6, the H level test signal SD can be generated, and when the knob position is 0 or more, the L level test signal SD can be generated. . That is, by generating the H-level test signal SD near the scale 0,
The output circuit 14 can output a timer output (instantaneous output) To. Therefore, the timer output (instantaneous output) To is turned on / off without turning off the analog timer 1.
Can be turned off.

In order to reliably generate the H-level test signal SD at the position of graduation 0 in consideration of the variation of the parts constituting the knob position detecting portion 15, the position of graduation 0 is shifted from the A point to the B point. Set (reference voltage V
R is set to a position voltage VD slightly larger than the scale 0 position).

Further, by changing the reference voltage VR, it is possible to set ON / OFF of the timer output (instantaneous output) TO from the output circuit 14 with an arbitrary scale position as a boundary.

As described above, the analog timer 1 according to the present invention has the test mode function, and when the test mode is set, the timer output T is set at the predetermined position of the time setting knob 5.
Since the ON / OFF of O is switched, when the time setting knob 5 is set to the predetermined position (scale 0 position), the timer output (instantaneous output) TO is output, and the time setting knob 5 is out of the predetermined position (larger than the scale 0). When it is set to the position), the timer output (instantaneous output) TO can be stopped, and the usability can be improved without requiring a complicated operation such as latch release.

Further, since the timer output (instantaneous output) TO according to the present invention can be turned on / off without turning off the power source, the timer output (instantaneous output) can be easily obtained without requiring a complicated operation such as latch release. Can be used.

Further, when the timer output (instantaneous output) TO according to the present invention is switched on / off, since the time setting knob 5 is in the vicinity of the 0 position of the scale, the timer output (instantaneous output) can be performed by the same operation as the conventional timer. Can be generated, and it is not necessary to release the latch without changing the operation, so that the convenience can be improved.

As described above, the analog timer according to the present invention has the test mode function, and when set in the test mode, the timer output is switched on / off at a predetermined position of the time setting knob. The timer output (instantaneous output) can be output when the time setting knob is set to a specified position, and the timer output (instantaneous output) can be stopped when the time setting knob is set outside the specified position, which is a complicated operation such as latch release. It is possible to improve usability without the need for.

[Brief description of drawings]

FIG. 1 is a front view of an analog timer according to the present invention.

FIG. 2 is a block configuration diagram of a main part of an embodiment of an analog timer according to the present invention.

FIG. 3 is a block diagram of the essential parts of an embodiment of a knob position detector according to the present invention.

FIG. 4 is an output characteristic diagram of a knob position detector according to the present invention.

[Explanation of symbols]

1 analog timer 2 Mode switching section 3 unit switching section 4 scale number switching section 5 hour setting knob 6 scale display 7 unit display 8 Output display section 9 Operation / energization display 10 Mode display 11 oscillator circuit 12 frequency divider 13 Counting / control unit 14 Output circuit 15 Knob position detector 16 comparator

Claims (3)

[Claims] 1. An analog timer for outputting a timer output at a predetermined position of a time setting knob, comprising a test mode function in addition to a timer operation mode function,
An analog timer, wherein when the test mode is set, the timer output is turned on / off at a predetermined position of the time setting knob. 2. The analog timer according to claim 1, wherein the timer output can be turned on / off without turning off the power. 3. The on / off switching of the timer output is
2. The analog timer according to claim 1, wherein the time setting knob is near the 0 position on the scale.