JP3423227B2 - Life meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device such as a lamp.
Measures the cumulative usage time of consumables and gives an indication of their life
Life meter. [0002] 2. Description of the Related Art In an endoscope light source device, an
When replacing lamps, which are consumables that are more electrically consumed,
To give a rough indication, measure the cumulative lighting time of the lamp.
There is a life gauge to display. A conventional life meter is disclosed in, for example,
While the lamp is lit as in JP 321019A,
The pulse of the timer circuit is added by the CPU circuit,
Device that displays the cumulative lighting time of the lamp with a 7-segment LED
was there. In this conventional example, while the lamp is lit,
The pulse of the timer circuit is counted by the CPU circuit and
The cumulative lighting time of the lamp is indicated by a 7-segment LED.
It is. While the power is off, the EEPR
By storing the cumulative lighting time of the lamp in the OM
To prevent the information on the accumulated lamp operating time from being lost.
I'm doing it. When the lamp is replaced, the lamp
Set the reset switch to reset the cumulative lighting time.
Push. However, the state of the reset switch is determined by the CPU circuit.
Monitoring, the power must be turned on when resetting.
You need to be. [0007] By the above operation, usually, the cumulative lighting of the lamp
The product time is displayed with a 7-segment LED, and when replacing the lamp
Is the cumulative lighting of the lamp by pressing the reset switch.
Resets the time and displays the cumulative lighting time of the new lamp
I can do it. [0008] The lamp in this conventional example
To reset the accumulated lamp operating time during replacement,
ON / OFF of the switch is monitored by the CPU circuit.
Therefore, the power must be turned on when performing a reset.
It was important. Further, when the lamp is replaced, the user himself resets the lamp.
Need to press the reset switch or reset switch.
Switch can be deliberately pressed, so the lamp is turned on.
There is a drawback that the accumulated time is not reliable. Therefore, the user must not perform the reset operation by himself.
At least when resetting the lamp, reset
To prevent reset operation, replace the lamp.
The reset operation of the accumulated lamp lighting time is performed in conjunction with the operation.
Is desired. However, the driving voltage of the lamp uses a discharge lamp.
If the lamp is
In this sense, it is normal to replace the lamp with the power turned off.
The lamp was replaced while the power was turned off.
It is necessary or desirable to be able to judge whether
The example did not take such a consideration into account. The present invention has been made in view of the above points.
Therefore, when the power is off,
Exchange operation can be detected and linked to the exchange operation
To provide a life meter that can reset the accumulated usage time
Aim. [0013] SUMMARY OF THE INVENTION A life meter according to the present invention is an electric life meter.
The cumulative usage time of typical consumablesThe cumulative use
Memory means capable of storing time informationFor life meter
To operate in conjunction with the replacement of consumables.
Switch placed and actuation of said switchAnd battery power
The source that sets and holds the replacement information for consumables
Switch means, and the exchange information held by the latch means.
Based on the stored in the memory meansThe cumulative use
Reset time informationReset cumulative usage time information
A step, provided on the latch means;Next replacement of the consumables
To prepare forFrom the cumulative use time information resetting means
OutputBased on the reset signal,The latch means
Reset the exchange informationExchange information resetting means,
It is characterized by having. [0014] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment will be described. (First Embodiment) FIGS. 1 to 4 show a first embodiment of the present invention.
FIG. 1 shows an embodiment provided with a first embodiment.
The endoscope light source device is shown together with the endoscope, and FIG.
Open the endoscope light source device in the state of replacing the lamp,
FIG. 3 shows the internal configuration of the endoscope light source device, and FIG.
3 shows a configuration of an exchange detection circuit. [0015] As shown in FIG.
An endoscope light source device (hereinafter simply referred to as a light source device) 1 has an endoscope
Connector connection with which the light guide connector 3 of the mirror 2 is detachable
A connection 4 is provided. The endoscope 2 has an elongated insertion section 5 and this insertion section.
5, an operation unit (gripping unit) 6 provided at the rear end,
And an eyepiece 7 provided at the rear end of the section 6. In addition,
A light guide base 8 is provided near the front end of the working section 6.
The light guide connected to the light guide base 8
Light guide connector 3 at the other end of the cable 9
By connecting to the connector connection part 4 of the
The light source lamp 11 (see FIG. 2) housed inside the light source device 1
Illumination light is supplied. The light source lamp 11 is an electric consumable.
If the light source lamp 11 is used for a long time,
Through the light guide of the endoscope 2
Illumination light when illuminating a subject such as an affected area
And an endoscope image obtained through the observation optical system of the endoscope 2.
Becomes dark. For this reason, in the light source device 1,
For example, the lamp life meter 14 (of the
The display unit 30) is provided, and the product in the lighting state of the light source lamp 11 is provided.
Light source by displaying the calculated usage time (cumulative usage time)
Provides an indication of whether the lamp 11 has reached the end of its life
I can get it. As shown in FIG. 2, one of the housings of the light source device 1
An opening 16 for lamp replacement is provided on the side of
This opening 16 is opened and closed by a lamp replacement door 17.
The configuration is The light source lamp 11 inside the opening is mounted.
Position of the light source lamp 11 is detected
A detection switch 18 is provided. And the light source run
When the switch 11 is set to the mounting position, this detection switch
The lever which constitutes one contact of the switch 18 is pushed and turned off.
In order to replace the light source lamp 11,
When the detection switch 18 is removed, the detection switch 18 is turned on. What
In FIG. 2, the light source lamp 11 is replaced to replace the new light source lamp.
Lamp 11 together with its heat sink 19
Shows a state of being inserted into the inside. As shown in FIG. 3, the inside of the light source device 1 is not shown.
The light source lamp 11 has a heat sink 19 in the lamp house.
It is detachably attached in the state where it is attached to. This light source
The lamp necessary for lighting the lamp is supplied from the power supply circuit 21 to the lamp 11.
Lamp lighting power is supplied and the lamp lighting current
The lighting state of the light source lamp 11 is detected by detecting
Put out. The power supply circuit 21 has a power cable 20 plug.
Connect the lug to an external commercial power outlet and
Switch to turn on the external commercial power supply.
You. Opposed to the light source lamp 11 and on its optical axis O
Is provided with a condensing lens 22 and is illuminated by the light source lamp 11.
The light is collected, and the light guide connector
3 is applied to the end face. Supply lighting power to the light source lamp 11
The power supply circuit 21 is a lamp for supplying lighting power.
By detecting the lighting current, etc., the light source lamp 11
Detects lighting conditions. In the lighting state, the power supply circuit 21
Sends a lighting signal LT (see FIG. 4) to the control circuit 25. This
The control circuit 25 has a CPU 26 mounted thereon, and the light source lamp 1
The usage time is measured by the lighting signal LT corresponding to 1. The CPU 26 turns on the power of the light source device 1.
Information can be electrically rewritten,
EEPROM (Electrica) as a volatile memory
lly eraseable programmable
  Reads the accumulated use time data stored in (ROM) 27
Should be issued and accumulated (accumulated) for the accumulated use time
The lighting time of the light source lamp 11 is measured. In this case, the CPU 26 operates at appropriate time intervals.
The old accumulated usage time data stored in the EEPROM 27
Update the data. With this update, the CPU 26
Power is turned off or reset during operation
When using the integration stored in the EEPROM 27,
Data is almost the same as actual accumulated use time data
The value can be maintained. The CPU 26 is connected to the power supply circuit 21 or the optical
The power of the source device 1 is turned off (after using the endoscopy)
Is used, the accumulated use time data is stored in the EEPROM.
27 and updates the old accumulated use time data. What
The light source lamp currently used is stored in the EEPROM 27 or the like.
Life data which is the life of the pump 11 is also stored. Also, the control circuit 25 (CPU 26)
1 and connected to the automatic channel 13 as shown in the enlarged view of FIG.
Dimming / manual dimming switch 28 or brightness setting
Switch 29a, brightness setting down switch 29b
Etc. are provided. And operated these switches
In that case, the CPU 26 responds to the operated switch
The control operation performed is performed. For example, the brightness setting up switch 29a or
Or when the brightness setting down switch 29b is operated
Is one step from the brightness setting value before the operation.
Increase or decrease the amount of emitted light by the level
Control of the opening and closing of the diaphragm 23 and the brightness setting
The brightness set by turning on the LED at the fixed value position
The set value is notified to the user. The CPU 26 operates on the panel 13
Lighting number of a plurality of LEDs forming the display unit 30 of the life meter 14
To estimate the life of the light source lamp 11 currently in use.
To the user. In the enlarged view of FIG.
Three of the five LEDs that are formed are turned on (or turned off),
The lamp has been used for about 60% of the life of the light source lamp 11.
And are displayed. When the life of the light source lamp 11 has been reached
Turns on all LEDs and then replaces the lamp
LED flashes when used beyond its life without being used
The message is displayed to prompt the user to replace the lamp. The control circuit 25 includes a lamp as shown in FIG.
A lamp replacement detection circuit 32 for detecting replacement is provided,
The detection output of the lamp replacement detection circuit 32 causes the CPU 2
6 is the accumulated use time data stored in the EEPROM 27
Is resetting. As shown in FIG. 4, the lamp replacement detection circuit 32
Is connected to the CPU 26, and the CPU 26
(Display unit 30). Ma
The CPU 26 is connected to the power supply circuit 21 by the light source lamp 11.
Is turned on, a lamp lighting signal LT is input. The lamp replacement detection circuit 32 indicates that the lamp has been replaced.
As a storage means for storing whether the
The latching relay 33 is used.
The set coil 34A of the switching relay 33 is the first contact
In series with the detection switch 18 through the contact ac of the path 35A.
A current is supplied from the battery 36. The reset command of the latching relay 33 is
One end of the file 34B is connected to a power supply terminal Vcc (the voltage is Vcc
The other end of the reset coil 34B
Is connected to the CPU 26 via the resistor R1 and the transistor 38.
Connected, and a reset signal RST is applied from the CPU 26.
Reset operation. When the detection switch 18 is turned on,
Set coil 3 through contact ac of contact circuit 35A
When a current flows through 5A, the second contact circuit 35B becomes contact b
Switch from the state where c turns on to the state where the contact ac turns on
available. The contact b of the second contact circuit 35B is connected to the ground.
And the contact c is connected to the power supply terminal Vcc via the resistor R2.
Connected to the check terminal of the CPU 26
ing. When the contact ac is turned on, C
Check signal CHK can be applied to PU26
I have. The set coil 34A and the reset coil
Diodes D1 and D2 are provided at both ends of the file 34B, respectively.
Connected to prevent excessive reverse voltage
Income). In this embodiment, the latching relay 33
Form storage means for storing lamp replacement information, and
The lamp turns on in conjunction with the lamp replacement operation when the lamp is off.
Lamp replacement operation by the detection switch 18
The detection switch 18 is turned on in conjunction with
Current to the set coil 34A using the power supply of the battery 36.
To turn on the contact ac of the contact circuit 35B,
Exchange information is held and the contact ac of the contact circuit 35A is held.
Is turned off to cut off the current from the battery 36 and replace the lamp.
When the power is turned on after the termination, the contact circuit 35B
Information that the lamp has been replaced by the CPU 26 via the contact ac
And sends a check signal CHK corresponding to
Based on the integrated use time data of the EEPROM 27
Resets and outputs a reset signal RST.
To turn off the contact ac of the contact circuit 35B
You. Operation of the present embodiment configured as described above
Will be described below. The power switch of the light source device 1 is turned on.
Then, an external commercial power supply is supplied to the power supply circuit 21,
The lamp drive converted to a predetermined DC voltage from the power supply circuit 21
Dynamic power is applied to the light source lamp 11 and
When the power circuit 21 is turned on and the control circuit 25 etc.
Then, power required for the operation is supplied. The CPU 26 is a ROM (not shown).
Default operation according to the written program
Start, and at that time, the accumulated
Data is read and stored in, for example, a register in the CPU 26.
And the total use time is calculated by the life
Is displayed on the display unit 30. The power supply circuit 21 is a light source for driving a lamp.
The light source run is detected by detecting the current flowing through the source lamp 11 or the like.
Lamp lighting signal L for detecting that the lamp 11 is lit
T to the CPU 26, and the CPU 26 receives this signal LT.
Performs a measurement to integrate the input time and calculates the integration in the register.
In addition to integrating the usage time data, the display on the panel 13
Display at 30. Then, at appropriate time intervals, the EEPR
A process of updating the accumulated use time data of the OM 27 is also performed. The CPU 26 sets the current time at appropriate time intervals.
Process to compare accumulated usage time data and life data
Do. Then, to the accumulated use time data close to the life data,
When it reaches, all the LEDs of the display unit 30 are turned on to extend the life.
The user is notified that the accumulated use time is near. this
The display allows the user to replace the light source lamp 11. This
When replacing the lamp, the power switch of the light source device 1 must be
Switch is turned off and the lamp replacement door 17 is opened. In this case, the power switch of the light source device 1 is turned off.
Also when the lamp replacement door 17 is opened without turning it off.
The interlock device does not work and the light source device 1 is turned off.
It becomes. This power is turned off when replacing the lamp.
Current leaks from lamp power to user replacing lamp
This is to prevent safety and the like from occurring. When the power of the light source device 1 is turned off, the CPU
Since no operating power is supplied to the CPU 26, the CPU 26 operates.
It does not work. If you replace the lamp in this state,
The detection switch 18 is turned on and set via the battery 36.
Current flows through the coil 34A and the latching relay 33
It is set. When a current flows through the set coil 34A,
The second contact circuit 35B determines whether the contact bc is turned on.
Then, the contact ac is turned on. This switching
As a result, the power supply is turned on and a predetermined DC voltage is applied to the power supply terminal Vcc.
When the voltage Vcc is applied)
Check signal CHK (in this case, “H” level)
Is applied and the latching relay 33 is set.
To be able to output things. Then, the old light source lamp 11 whose life has expired
After replacing work with a new light source lamp 11 from the
When the power of the device 1 is turned on, the CPU 26
HK is detected, and it is determined that lamp replacement has been performed. Soshi
When using the old integration stored in the EEPROM 27
Resets the data during
At the same time as outputting a reset signal RST,
A current flows through the coil 34B, and the second contact circuit 35B
The state where the contact bc is turned on (from the state where the contact ac is turned on)
Reset to prepare for the next lamp replacement operation.
It will be in a state that can be obtained. When replacing the lamp, the battery 36 is turned off.
Little energy is expended. That is, the set coil
When a current flows through 34A, contact cb turns on from contact ca
The current flowing by this switching is
When current flows through the set coil 34A because it is cut
The interval is short, so that the electrical energy held by the battery 36 is small.
Only kana electric energy is consumed. When the lamp has not been replaced
When the power is turned on, the check signal CHK is
The switching relay 11 remains reset (that is,
(“L” level), the CPU 26
It is determined that it has not been performed. According to the present embodiment, when the power is off
The lamp replacement work
Switch to the storage means using the power source of the battery 36.
Lamp replacement information is stored and the power is
When the power is turned on, the information stored in the storage
The usage time can be reset. In addition, lamp exchange
During the replacement operation, the electric energy of the battery 36 is reduced for a short time.
Since the battery 36 is only consumed, the battery 36 must be replaced for a long time.
There is no need to In addition, it can be realized with a simple configuration and low cost
Can be (Second Embodiment) FIG. 5 shows a second embodiment of the present invention.
The configuration of the lamp replacement detection circuit 42 in the embodiment
Show. This lamp replacement detection circuit 42 is a first embodiment.
Latch as in the case of the lamp replacement detection circuit 32 in FIG.
The relay 33 is employed. In this embodiment, the latching relay 33
The anode of the battery 36 is connected to one end of the set coil 34A.
The thyristor 4 is connected to the other end of the set coil 34A.
The anode of the thyristor 43 is connected to the
Is connected to the cathode of the battery 36 via the capacitor C1.
Have been. The gate of the thyristor 43 is connected in parallel.
Cathode of battery 36 via anti-R3 and capacitor C2
Connected to. Further, one end is connected to the anode of the battery 36.
The other end of the resistor R4 is silenced through the detection switch 18.
Connected to the gate of the star 43, the detection switch 18 is turned on
Then, through the thyristor 43, the set coil 35A
The current is made longer. The capacitor C1 is a set coil 34
This is for supplying a current to A for a minimum time. So
The other configuration is the same as that of FIG.
The same reference numerals are given and the description is omitted. The operation of this embodiment is different from that of the first embodiment.
Similar. When the light source lamp 11 reaches the end of its life
When performing the replacement, turn off the power switch of the light source device 1.
Then, the lamp replacement door 17 is opened. In this case, the power switch of the light source device 1 is turned off.
Also when the lamp replacement door 17 is opened without turning it off.
The interlock device does not work and the light source device 1 is turned off.
It becomes. When the power of the light source device 1 is turned off, the CPU
Since no operating power is supplied to the CPU 26, the CPU 26 operates.
It does not work. If you replace the lamp in this state,
The detection switch 18 is turned on, and the size is
A voltage for turning on this thyristor 43 is applied to the gate of the
Pressure is applied, a current flows through the set coil 34A, and the
The switching relay 33 is set. In this case, the set coil 34A
Since the sensor C1 is connected in series,
Current flows through the reset coil 34A, and the second contact circuit 35B
Indicates a state in which the contact ac is turned on from a state in which the contact bc is turned on
Is switched to. By this switching, (power is turned on and
A predetermined DC voltage Vcc is applied to the power supply terminal Vcc.
(In this case), the CPU 26 (in this case, “H” level)
Check signal CHK) is applied and the latching
-33 can output that it has been set.
You. Then, the old light source lamp 11 whose life has expired
After replacing work with a new light source lamp 11 from the
When the power of the device 1 is turned on, the CPU 26
HK is detected, and it is determined that lamp replacement has been performed. The data stored in the EEPROM 27 is
Reset the old accumulated usage time data
Start from 0 and reset signal RST is
And output a current to the reset coil 34B,
Contact of the contact circuit 35B (from the state where the contact ac is turned on)
bc is turned on.
It is in a state ready for the operation of replacing the tape. When replacing the lamp, the battery 36 is turned off.
The consumed energy is detected by the capacitor C1.
It only flows for a short time when 18 is on, so
Slight electric energy of electric energy held by the battery 36
Is only consumed. When the lamp has not been replaced
When the power is turned on, the check signal CHK is
The switching relay 11 remains reset (that is,
(“L” level), the CPU 26
It is determined that it has not been performed. This embodiment is the first embodiment.
It has the same effect as the embodiment. (Third Embodiment) FIG. 6 shows a third embodiment of the present invention.
3 shows a lamp replacement mechanism in the embodiment. Of this implementation
The light source lamp 51 in the embodiment is of a type with a reflecting mirror.
The light source lamp 51 is fixed by a lamp fixing member 52.
Is determined. In this embodiment, whether the lamp has been replaced
Is detected at the position where the detection switch 18 is provided.
You. More specifically, in FIG.
Reference numeral 8 is provided at a position where the lamp replacement door 17 is opened and closed.
That is, when the lamp replacement door 17 is closed, the lamp replacement
The switch lever is pushed by the door 17 and the detection switch 18 is pressed.
2 contacts are turned off and the lamp is switched as shown by the two-dot chain line.
When the replacement door 17 opens, it is detected because the switch lever is not pressed
Two contacts of the switch 18 are turned on. So
Other configurations are almost the same as those of the first embodiment. Ma
The operation and effect are almost the same as those of the first embodiment.
You. In the modification of FIG. 6B, the detection switch
H is near the position where the lamp fixing member 52 is attached.
It is provided in. In other words, in this modification, the lamp is fixed.
The presence or absence of the member 52 is detected. this
The modified example is a modification of the third embodiment in which the lamp is replaced without replacing the lamp.
By simply opening and closing the replacement door 17, the lamp is replaced.
It can be prevented from being detected as having been lost. Its effect
The result is almost the same as in the first embodiment. (Fourth Embodiment) FIG. 7 shows a fourth embodiment of the present invention.
Lamp replacement detection function in light source device 1 of the embodiment
Shows a configuration of a control circuit 61 provided with. In this embodiment,
The power supply circuit 21 supplies power to the light source lamp 11 to turn on the lamp.
Supply to the power supply monitoring circuit 62 in the control circuit 61 as well.
Supply its power. This power supply monitoring circuit 62
For example, the voltage supplied to the lamp is divided by resistors
The light source depends on whether the voltage is higher than a predetermined voltage.
Lamp lighting signal LT indicating whether or not lamp 11 is lit
Is output to the CPU 26. The clock generation circuit 63
The clock required for the operation is applied, and this clock
Performs predetermined operations in synchronization with each other.
By counting the clocks of the
Perform measurement to accumulate usage time. The power supply circuit 21 has a power supply monitoring circuit 62
When the power required for the operation is supplied to the CPU 26 through the
Both are forward diodes (from the power supply monitoring circuit 62 side)
The signal is supplied to the lamp replacement detection circuit 64 via D3,
Via forward diode D4 in series with diode D3
RAM that operates with low power consumption and stores integrated usage time
Power is also supplied to 65. Lamp replacement detection via power supply monitoring circuit 62
The power supplied to the circuit 64 is the switch detection circuits 66 and 2
It is supplied to the next battery 67. That is, the power supply circuit 21
Secondary battery 67 via monitoring circuit 62 and diode D3
And a switch detection circuit 6
6 is also powered. When the power is off, the backup
A rechargeable battery 67 serving as a power supply is supplied to a switch detection circuit 66.
While supplying power like operation, through the diode D4
The power is also supplied to the RAM 65. The ON operation of the detection switch 18 is detected.
The output terminal of the switch detection circuit 66
Bus (a specific address Add) and a data bus (a specific address Add).
Connected to the specific bit Data) to store the memory information of lamp replacement
The information is sent directly to the RAM 65 by the switch detection circuit 66.
You can write to it. The CPU 26 also stores the (specific address) in the RAM 65.
Address bus (including address Add) and (specific bit D)
data) (including data detection)
The stored information of the lamp replacement written by the path 66 is read.
And write the accumulated usage time data.
It has become so. Next, the operation of this embodiment will be described. Real truth
In the operation of the present embodiment, the power of the light source device 1 is turned off.
Thereafter, the detection switch 18 is operated by replacing the lamp.
And the switch detection circuit 66 operates the detection switch 18.
Detected that the lamp has been replaced in the RAM 65
(For example, a lamp replacement flag bit) is written. After the lamp replacement is completed, the light source device 1
When the power is turned on, the CPU 26 starts operating and runs.
Monitor the bits that are written that the swap has been performed. La
If the exchanged data is confirmed, the lamp
Reset the usage time data and count from the initial value 0.
So that In each of the above embodiments, lamp replacement is not required.
When the accumulated usage time is automatically reset when the
As shown, after replacing the lamp, the LED on the panel life meter
Display the end of life or blinking display
The display shows that the user has
Reset only by operating the power switch
Can be performed. Also a lamp
Replacement LED is provided, and reset display
A switch may be operated. In this case, the lamp life is not
To temporarily change the lamp and then return to the previous lamp
In this case, the accumulated time is automatically reset even though the life is remaining.
Can be prevented from being cut. For reset
If switches are not provided on the panel,
As reset by pressing the switch simultaneously
It is also possible to [Appendix] 1. A life meter that measures the cumulative usage time of electrical consumables
To operate in conjunction with the replacement of consumables.
The switch placed and the operation of the switch, the battery
Storage means for storing and operating replacement information of consumables by a power supply
And information on the accumulated use time based on the information stored in the storage means.
Reset means for resetting the information.
Life indicator to be a sign. 2. In Appendix 1, electrical consumables are
The cumulative usage time is the cumulative usage time of the lamp. 3. In Supplementary Note 1, the resetting means replaces consumables,
Performed when the power of the device equipped with the life gauge is off
The switch is detected to be turned on. 4. In Supplementary Note 1, the switch fixes the lamp
Link with the lamp fixing member. 5. In Appendix 1, the storage means is
It is a Ching relay. 6. In Supplementary Note 1, the life meter was provided in the light source device. 7. In Appendix 1, the light source device is a light guide of an endoscope.
Is an endoscope light source device detachably connected. [0079] According to the present invention, as described above,
Lifetime meter that measures the cumulative usage time of genuine consumables
To operate in conjunction with the replacement of consumables.
Switch and the operation of the switch, the battery power
Storage means for storing and operating replacement information of consumables by a source;
According to the information stored in the storage unit, the information of the accumulated use time can be obtained.
And reset means for resetting.
If the consumables are replaced even if
Consumables replacement information in storage means using battery power
Is remembered, and then the power is turned on.
If there is an exchange operation according to the information stored in the storage means
Can be determined, and if there is a replacement operation of consumables,
Can be reset.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing an endoscope light source device provided with a first embodiment of the present invention together with an endoscope. FIG. 2 is a perspective view showing the endoscope light source device in a state where a lamp replacement door is opened to replace a lamp. FIG. 3 is a block diagram showing an internal configuration of the endoscope light source device. FIG. 4 is a circuit diagram showing a configuration of a lamp replacement detection circuit. FIG. 5 is a circuit diagram showing a configuration of a lamp replacement detection circuit according to a second embodiment of the present invention. FIG. 6 is a diagram showing a lamp replacement detection mechanism according to a third embodiment of the present invention and its modification. FIG. 7 is a block diagram illustrating a configuration of a control circuit 61 having a lamp replacement detection function according to a fourth embodiment of the present invention. [Description of Signs] 1 ... (Endoscope) Light Source Device 2 ... Endoscope 3 ... Light Guide Connector 4 ... Connector Connection Portion 11 ... Light Source Lamp 13 ... Panel 14 ... (Lamp) Life Meter 17 ... Lamp Replacement Door 18 ... Detection switch 21 Power supply circuit 22 Condenser lens 23 Aperture 25 Control circuit 26 CPU 27 EEPROM 30 Display unit 32 Lamp replacement detection circuit 33 Latching relay 34A Set coil 34B Reset coils 35A, 35B Contact circuit 36 ... Battery 38 ... Transistor

Claims (1)

(57) [Claim 1] A memory device capable of storing information on the cumulative use time for measuring the cumulative use time of the electrical consumable.
In a life meter having a step, a switch arranged to operate in conjunction with a replacement operation of a consumable, and replacement of the consumable by operation of the switch and power supply of a battery.
Latch means for setting and holding information, based on the exchange information held by the latch means,
The accumulated use time information resetting means for resetting said cumulative use time information stored in the memory means, the provided latch means, an output from the cumulative use time information resetting means to prepare for the next replacement of the consumable Sa
And a replacement information reset means for resetting the replacement information of the latch means on the basis of a reset signal generated.