JPH10233111A - Multiple lamp type light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multiple lamp type light source device in which, when lamps are switched from one to the other, the position of the lamp can be surely set in a predetermined position on an optical axis. SOLUTION: Two lamps 13A, 13B to which lamp lighting power can be supplied from a lamp lighting circuit 21 are mounted on a moving plate 12 moved by a motor 14, and limit switches 17A, 17B are provided which detect positions to make sure that the lamps 13A, 13B have been set on an optical axis 16. A controller 19, when moving one of the lamps via the motor 14 to set it in a predetermined position on the optical axis 16, samples a position detection signal 18A or 18B produced by the limit switches 17A, 17B, in such a way as to delay the signal by means of a delay circuit 34, thereby performing an error correction by which, after the position has been detected by the limit switches 17A, 17B, the lamp is moved to a position where its lever does not move, and thus setting the lamp in a predetermined correct position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-lamp system in which, when a lamp set on an optical axis stops lighting, another lamp is automatically set on the optical axis and turned on. The present invention relates to a lamp type light source device.

[0002]

2. Description of the Related Art A light source device is used for an apparatus such as an endoscope which requires illumination light for observation. In this light source device, there is a possibility that the built-in lamp may not be turned on during use due to breakage of the filament or the like, so that in order to cope with such a situation, a multi-lamp type such as two lamps having a spare lamp is used. Some are structured.

For example, Japanese Examined Patent Publication No. 3-61167 has an illuminating lamp and its auxiliary light, and when the illuminating lamp is disconnected, a motor is driven to attach the illuminating light and the auxiliary light. A multi-lamp light source device is disclosed in which a mounting plate is turned to set a spare lamp on an optical axis.

In this conventional example, among a plurality of lamps consisting of an illuminating lamp and a spare lamp, the lamp is set at a position on the optical axis until the lamp to be used is disconnected.

[0005]

However, in the prior art, since a mechanical switch or the like having a wide range for position detection is used as the position detecting means, a predetermined value to be set at the time of lamp replacement or lamp switching is used. In some cases, the position may be set to a position deviated from the position, and the position cannot be surely set correctly.

If the position is not set correctly as described above, an appropriate amount of light when the position is correctly set cannot be obtained, resulting in dark illumination.

[0007] Further, in the conventional example described above, if a certain impact is applied when the lamp is not used, the problem that the lamp moves from the set position and a normal light amount cannot be obtained and the lamp becomes dark cannot be solved.

(Aim of the Invention) A first object of the present invention is to provide a multi-lamp type light source device which can surely set the position of a lamp used at the time of lamp switching or lamp replacement to a predetermined position on an optical axis. Is to provide.

A second object of the present invention is to provide a multi-lamp type light source device which can surely set the position of a lamp to be used at power-on, lamp switching or lamp replacement at a predetermined position on the optical axis. Is to provide.

[0010]

Means for Solving the Problems A plurality of lamps are provided, and the position of an arbitrary first lamp set on the optical axis is detected by position detecting means having a width in position detection, and the lamp state detecting means detects the position of the first lamp. A moving means for moving the second lamp to the optical axis side in a multi-lamp light source device that automatically switches to another second lamp when it is determined that the first lamp is disconnected;
Providing a delay unit for performing an operation of correcting the width of the position detection from when the position detecting unit detects that the second lamp is set on the optical axis to when the operation of the moving unit is stopped. Accordingly, when the lamp is switched or the lamp is replaced, the deviation from the optical axis can be corrected and the correct position can be set.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment) FIGS. 1 to 4 relate to an embodiment of the present invention, FIG. 1 shows a basic structure of a multi-light type light source device of one embodiment, and FIG. FIG. 3 is a timing chart for explaining the operation when the power is turned on, and FIG. 4 is a timing chart for explaining the operation for switching the lamp being used to the other lamp that has been disconnected.

As shown in FIG. 1, a multi-lamp type light source device 1 of the present invention uses a lamp set on an optical axis by a lamp position detecting means 2.
To detect. The lamp position detecting means 2 has at least two
Detected by the position detection output signals of the three position sensors 3A and the second position sensor 3B and output to the control means 4.

Further, there is provided a lamp disconnection detecting means 5 for detecting disconnection of each lamp, and an output of the lamp disconnection detecting means 5 is inputted to a lamp selecting means 6, and the lamp selecting means 6 is provided.
Outputs to the control means 4 information for selecting a lamp to be set and used on the optical axis.

When the control means 4 receives, for example, a disconnection of a lamp set on the optical axis from this information, it activates a lamp switching means 7 for setting an unused lamp on the optical axis.

The control means 4 operates the moving means 9 to move the lamp toward the optical axis, and the position sensor 3A or 3B
By delaying the moving operation of the moving means 9 by the time delayed by the delay means 8 from the output timing of the position detection signal set on the optical axis, the position sensor 3A is terminated.
And 3B correct the position detection including an error.

Next, an embodiment of the present invention will be specifically described with reference to FIG. In the multi-lamp light source device 11 according to the embodiment shown in FIG.
) Lamps 13A and 13B are exchangeably mounted via a lamp socket (not shown).

The moving plate 12, on which the lamps 13A and 13B are mounted, can be moved, for example, in the direction of an arrow by a motor 14 as moving means, and one of the lamps 13A is positioned on an optical axis 16 on which a condenser lens 15 is disposed. A limit switch 17A is arranged as a lamp position detecting means for detecting the position set in the optical axis 16, and a limit switch 17B is arranged in order to detect the position of the other lamp 13B set on the optical axis 16.

Specifically, one end of the movable plate 12 is connected to the limit switch 1 at a position where the lamp 13A is set on the optical axis 16.
The switch 7A is turned on by pressing the lever 7A, and the other end of the movable plate 12 is turned on by pressing the lever of the limit switch 17B at the position where the lamp 13B is set on the optical axis 16.

Outputs of limit switches 17A and 17B,
That is, the position detection signals 18A and 18B (in FIG.
8A and the position 18B) are input to a controller 19 that controls each component of the apparatus. The controller 19 controls the rotation and stop of the motor 14.

For example, when the controller 19 applies a movement signal 20A (simply abbreviated as movement 20A in the figure) to the motor 14, the controller 13 moves the lamp 13A in the direction set on the optical axis 16 and sends the motor 14 a movement signal. 20B (in the figure, simply abbreviated as movement 20B), the lamp 13B
In the direction set on the optical axis 16. More specifically, if the moving signal 20A is a DC signal of one polarity,
The movement signal 20B is a DC signal of the opposite polarity, and the motor 14 rotates in the reverse direction to move the movable plate 12 in the opposite direction, thereby setting the lamp 13B on the optical axis 16 as shown by the two-dot chain line in FIG. .

One of the electrodes of the lamps 13A and 13B is connected to a lamp lighting circuit 21 for generating a lighting power supply for lighting the lamps 13A and 13B, and the other electrode is connected to the lamp lighting circuit 21 via relays 22A and 22B, respectively. It is connected to the. The lamp lighting circuit 21 is connected to a power supply circuit 23, and power required for lamp lighting operation is supplied from a commercial power supply via the power supply circuit 23.

The ON and OFF of the relays 22A and 22B are controlled by the controller 19. The lamp 13
It has a lamp lighting storage relay 24 indicating which of A and 13B is lighting. One contact of the relay 24 is connected to the power supply terminal Vc via the resistor R1 and connected to the controller 19, the other contact is grounded, and the common contact is connected to the controller 19. Then, from the level of the common contact, the controller 19 determines which lamp is lit.

The controller 19 controls the lamp lighting control signal 2
5 (abbreviated as a lamp lighting control 25 in FIG. 2) to the lamp lighting circuit 21, the lamp lighting circuit 21 causes the lamp 13A or 13A with the relay 22A or 22B turned ON.
Supply lamp lighting power to B.

The lamp lighting circuit 21 includes a relay 2
A lamp current detection circuit 26 for detecting a current value when the lamp lighting power is supplied to the lamp 13A or 13B in which the lamp 2A or 22B is turned on is built in, and a lamp current detection signal 27 (see FIG. The lamp current detection 27 is abbreviated to the controller 19.

The controller 19 receives the lamp current detection signal 2
7, the lamp state such as disconnection or life of the lamp is detected from the current value detected. In the present embodiment, a means for detecting disconnection of the other lamp is also provided.

For example, the other electrodes of the lamps 13A and 13B are connected to two contacts of a relay 28 for disconnection detection.
The common contact is connected to the lamp lighting circuit 21 via the light emitting diode 30 and the resistor R2 of the photocoupler 29, for example. The relay 28 is connected to the controller 19.
Controls the contacts that are turned on.

A small current flows from the lamp lighting circuit 21 to the lamp selected by the relay 28 via the resistor R2, the light emitting diode 30, and the relay 28. That is, if the lamp is not disconnected, a small current flows. The photocoupler 28 has a built-in phototransistor 31 for receiving the light of the light emitting diode 30,
The emitter of the phototransistor 31 is grounded, and the collector is connected to the power supply terminal Vc via the resistor R3 and to the controller 19.

Therefore, the controller 19 determines that the disconnection or no disconnection has occurred depending on whether the potential of the collector of the phototransistor 31 is "H" or "L".
In this case, the controller 19 does not detect the presence / absence of the disconnection directly through the optical coupling by the photocoupler 29, instead of using the current drop or the like flowing from the lamp lighting circuit 21 to the resistor. It can be performed in a state insulated from the system. The controller 19
When a disconnection or the like is detected, the disconnection is displayed on the display unit 33 of the front panel 32 to form a disconnection notifying means for notifying the surgeon of the disconnected lamp. Also, when it is determined that the service life has been reached, it may be notified.

As described above, in the present embodiment, disconnection detection is performed for any of the plurality of lamps 13A and 13B, a normal lamp is selected (selected), and a relay is selected for the selected lamp. 22A or 22B is turned ON, and a lamp not selected is selected by the disconnection detection relay 28.

When the selected lamp is moved to a set position on the optical axis 16, the moving plate 12 is moved by the motor 14 as a moving means, and the position detection signal from the limit switch 17A or 17B is received. 18A or 1
8B that the controller 19 has been set to a predetermined position.
Performs the control to stop the movement upon receipt. In the present embodiment, the controller 19 has a delay circuit 34, and a position detection signal 18A from the limit switches 17A and 17B.
And 18B are delayed by the delay circuit 34 and taken in, and the corresponding control, that is, the movement of the motor 14 is stopped.

More specifically, since the limit switch 17A or 17B has a certain width at the position where each lever is pressed and turned on, if the movement is stopped immediately at the moment when the limit switch 17A or 17B is turned on, the position on the optical axis is reduced. Since the operation of setting the predetermined position is an unstable setting operation including an error, in the present embodiment, the position detection signal 18 is turned on by the delay circuit 34 until the lever reaches a position where it cannot be moved after being turned on.
After the delay of A or 18B, the moving operation of the motor 14 is stopped.

Further, the mounting positions of the limit switches 17A and 17B are adjusted such that the lamp is at a predetermined position on the optical axis where the lever does not move so as not to shift.

In other words, when the movable plate 12 on which the lamp is mounted is moved to set the lamp on the optical axis when the lamp is replaced or when the lamp is switched, the output is performed when the lamp is set on the optical axis. The delay time is obtained by delaying the end time of the moving operation by delaying the position detection signal (including a deviation or an error with respect to the correct predetermined position on the optical axis) by the mechanical position detection unit. The error is corrected to a correct (error-free) predetermined position within the position, so that the error-corrected predetermined position on the optical axis is ensured.

In the present embodiment, when the power is turned on, the lamp set on the optical axis 16 is once removed from the optical axis 16 and then set on the optical axis 16. Because it is done, even if the lamp is moved from the correctly set position due to some impact when not in use, it can be surely set to the predetermined correct position, A predetermined amount of illumination light can be supplied to an end face of a light guide of an endoscope (not shown) mounted at a position in front of the condenser lens 15 on the optical axis 16.

Next, the operation of this embodiment will be described. The lamp lighting circuit 21 receives a lamp lighting control signal 25 from the controller 19 and supplies power to, for example, the lamp 13A, and the controller 19 controls each element. When the lamp 13A is on the optical axis 16 and the limit switch 17A is ON, when the power of the apparatus is turned ON and power is supplied to the controller 19, the operation shown in FIG.

In FIG. 3, when the power is turned on in FIG. 3A, the limit switch 17 is turned on as shown in FIG.
A is ON, as shown in FIG.
It is assumed that 7B is in the OFF state.

In this case, the controller 19
As shown in (f), a moving signal 20B is output to the motor 14, the moving plate 10 is once moved by the motor 11, the lamp 13A is removed from the optical axis 16, and the limit switch 1 is turned off.
The movement is performed until 7A is turned off (however, the controller 19 is detected with a delay by the delay circuit 34). FIG.
The time T1 shown in (d) indicates that there is a width in position detection (more specifically, the range that is turned on by the movement of the lever of the limit switch 17A).

The controller 19 includes a relay 22A.
Is turned on and the relay 22B is turned off, and the disconnection detection relay 28 is connected to the lamp 13B side. This relay 28
Is connected to the lamp 13B side, the controller 19 detects whether or not the lamp 13B is disconnected from the collector level of the phototransistor 31 of the photocoupler 29.

At time t1 when the controller 19 detects that the limit switch 17A has been turned off, the controller 19 sends a lamp lighting signal control signal 25 to the lamp lighting circuit 21 to light the lamp 13A.

As shown in FIG.
Sends a movement signal 20A to the motor 14, and this lamp 13
By moving A to the optical axis 16 side, for example, the limit switch 17A is turned on at time t2, and the delay circuit 34
The controller 19 receives the position detection signal 18A at a time delayed by a certain set time T2 (the time of T2 is, for example, about several seconds), turns off the movement signal 20A, and completes the movement.

During this moving operation, a lamp current detection signal 27 is sent from the lamp lighting circuit 21 to the controller 19, and the controller 19 confirms that the lamp 13A is normal.

In FIG. 3, before the lamp state detection shown in FIG. 3B is performed, a movement operation for outputting a movement signal 20A for moving the lamp 13A to the optical axis side is started by the lamp current detection signal 27. I have. If it is determined by the current detection signal 27 during the moving operation that the lamp is broken or the life is determined by the lamp state detection, the moving operation is stopped and the lamp switching operation of moving the other lamp on the optical axis is performed. become. In the operation example of FIG. 3, in order to set the lamp on the optical axis in a short time, the movement is started before the detection of the lamp state, but the movement operation may be performed after the detection of the lamp state.

Next, the operation at the time of lamp switching will be described with reference to FIG. 4, for example, when the lamp 13A is disconnected. When the lamp 13A is disconnected, the lamp current detection signal 27 input from the lamp lighting circuit 21 to the controller 19 becomes "L" (time t3 in FIG. 4), and the controller 19 determines from the signal that the lamp is disconnected. State detection (indicated by “L” in FIG. 4A).

Then, the controller 19 sets the lamp lighting control signal 25 to "L" to the lamp lighting circuit 21 (FIG. 4).
(See (b)), the operation of the lamp lighting circuit 21 is stopped.

When a current flows through the photocoupler 29 for detecting disconnection of the lamp 13B, the controller 19 turns on the relay 22B, turns off the relay 22A, switches the power supply system to the lamp 13B, and turns on the lamp lighting control signal 25. Is set to "H", and the movement signal 20B shown in FIG. 4E is sent (time t4 in FIG. 4) to turn on the lamp 13B.

When the movement signal 20B is sent to the motor 14, the position detection signal 18A of the limit switch 17A shown in FIG. 4C is turned off after the time T1 from the time t3 as described above.

Further, as shown in FIG. 4D, the controller 19 receives the position detection signal 18B after a time T2 from the time t5 when the position detection signal 18B of the limit switch 17B is turned ON, and moves. Signal 20
B is turned OFF, and the moving operation is completed.

With this operation, the limit switch 17B
The position detection signal 18B has a certain width to be turned on, that is, even if the position detection signal includes an error, the error is corrected, and the operation of setting the lamp 13A on the optical axis 16 with reference to FIG. As in the case, the lamp 13B can be reliably set at a predetermined position on the optical axis 16.

It is to be noted that substantially the same operation is performed when the lamp is replaced with a new lamp due to disconnection or the like and the power is turned on. This embodiment has the following effects. An appropriate amount of light can be obtained whenever the power of the apparatus is turned on, when the lamp is replaced, when the lamp is switched, and so on.

In FIG. 1, the controller 19 may reduce the speed of the motor 14 before the movement of the motor 14 is completed, and may complete the movement after shifting to this deceleration operation.

In this way, the limit switch 17
When the moving plate 12 hits A and 17B and stops, the impact given to the limit switches 17A and 17B can be reduced, and there is an effect that a shift in long-term use can be prevented.

As shown in FIG. 5, the multi-lamp light source device 11 of the present embodiment is provided with a plurality of (at least two) structures to which a handle 42 can be attached on the main body 41 of the multi-lamp light source device 11. I have.

The front panel 32 of the main body 41 is provided with a display unit 33 and an endoscope connection connector receiver 43, and screw holes 44a and 44b for mounting the handle 42 when the light source device is used alone are provided on the side surface. Screw 45a, 4
The handle 42 can be attached by 5b.

The light source device 1 is provided on the upper surface of the light source device 11.
Screw holes 47a, 4 for attaching the handle 42 when other peripheral devices 46 are connected, for example, when the system is upgraded.
7b is provided so that the handle 42 can be attached to the upper surface. Further, screw holes 48a and 48b for system up are provided on the side surface.

In FIG. 2, the limit switches 17A,
The position detection signals 18A and 18B of the motor 17B are delayed.
0A and 20B may be delayed by delay means.

Although the above embodiment has been described with reference to a two-lamp system, the present invention can be applied to a case with three or more lamps. For example, in FIG. 2, the moving plate 12 is changed to a rotating plate, for example, three lamps are provided, and a groove or a concave portion is provided in the rotating plate for detecting the position of each lamp, and a limit is provided on the wall surface of the groove or the concave portion. Attach a switch and set a not-shown pin in the groove or recess when the lamp is set near the optical axis for the lamp set on the optical axis. By stopping the rotation operation with the position detection signal delayed by the delay circuit after being turned on, each lamp can be set to a predetermined position without displacement on the optical axis.

[Supplementary Notes] When a plurality of lamps are provided, and the position of an arbitrary first lamp set on the optical axis is detected by position detection means having a width in position detection, and the lamp state detection means determines that the first lamp is disconnected. In the multi-lamp type light source device automatically switching to another second lamp, a moving means for moving the second lamp to the optical axis side, and the second lamp is set on the optical axis from the position detecting means. A delay means for performing an operation of correcting the width of the position detection from when the movement is detected to when the operation of the moving means is stopped.

2. Further, the apparatus further includes a control unit for performing an operation of temporarily removing the first or second lamp set on the optical axis from the optical axis when the power is turned on, and setting the first or second lamp on the optical axis. 2. The multiple light source device according to 1. (Effect of Supplementary Note 2) In addition to the effect of Supplementary Note 1, the first or second lamp can be reliably set at a correct predetermined position on the optical axis even when the power is turned on.

[0059]

As described above, according to the present invention, a plurality of lamps are provided, and the position of an arbitrary first lamp set on the optical axis is detected by position detecting means having a width in position detection. A moving means for moving the second lamp to the optical axis side in a multi-lamp light source device which automatically switches to another second lamp when the first lamp is determined to be disconnected by the lamp state detecting means; A delay unit that performs an operation of correcting the width of the position detection from when the position detecting unit detects that the second lamp is set on the optical axis to when the operation of the moving unit is stopped; Therefore, when the lamp is switched or the lamp is replaced, the deviation from the optical axis can be corrected and set to a correct predetermined position.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of the present invention.

FIG. 2 is a configuration diagram of a multiple light source device according to an embodiment of the present invention.

FIG. 3 is a timing chart showing an operation at power-on.

FIG. 4 is a timing chart illustrating an operation of switching to another lamp when a lamp in use is disconnected.

FIG. 5 is a perspective view showing a structure in which handles can be attached to a plurality of positions of the light source device main body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Multi-lamp type light source device 2 ... Lamp position detecting means 3A, 3B ... Position sensor 4 ... Control means 5 ... Lamp disconnection detecting means 6 ... Lamp selecting means 7 ... Lamp switching means 8 ... Delaying means 9 ... Moving means 11 ... Many Lamp type light source device 12 Moving plate 13A, 13B Lamp 14 Motor 16 Optical axis 17A, 17B Limit switch 18A, 18B Position (position signal) 19 Controller 20A, 20B Moving (movement signal) 21 Lamp Lighting circuit 22A, 22B, 28 relay 23 power supply circuit 25 lamp lighting control (lamp lighting control signal) 26 lamp current detection circuit 27 lamp current detection (lamp current detection signal) 29 photocoupler 34 delay circuit

Continued on the front page (51) Int.Cl. ⁶ Identification code FI G03B 15/05 G03B 15/05

Claims (1)

[Claims] A plurality of lamps, wherein a position of an arbitrary first lamp set on the optical axis is detected by position detecting means having a width in position detection, and the first lamp is detected by a lamp state detecting means. A multi-lamp light source device that automatically switches to another second lamp when it is determined that the wire is broken; a moving unit that moves the second lamp toward the optical axis; A multi-lamp light source device, comprising: delay means for performing an operation of correcting the width of the position detection from when the movement of the moving means is stopped after the on-axis setting is detected.