JPS6022112A - Light source device - Google Patents

Abstract

PURPOSE:To prevent the lead wire of an emergency lamp from being broken by providing a rotation prevention switch and a stopper, and preventing a turret from making >=1 turns. CONSTITUTION:When the turret 9 is to make >=1 turn owing to the malfunction of a motor, etc., a receiving rod 22 presses the actuator 24a of the 1st switch 24 firstly to reverse the motor. At this time, the rod 22 never strikes the stopper 22. Then, a return to normal operation is not made another turn is made to operate the 2nd switch 25, reversing the motor again. When a turn is made in the same direcion as it is even when the respective switches are operated, the rod 22 strikes the stopper 23 and stops completely. Thus, absolute safety is secured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nib source device used, for example, in an endoscope.

Regarding the light source device for encyclopedia, what is the appropriate light amount and color tone depending on the type of body cavity to be observed, the wireless at the time of photography, the light amount of the light source lamp, etc.? In order to make adjustments, multiple filter tubes are prepared and can be selected and used.Also, an emergency light is provided that can be used immediately when the light source lamp runs out of use. These filters and emergency lights are installed along the circumferential direction of a rotatable turret plate.By rotating the turret plate tube, Necessary filters and emergency lights are placed on the output optical path.

By the way, there is a lead wire extending from the emergency light above.
For this reason, if the turret plate rotates more than once, there is a danger that the lead wire may break and cause an electric shock.

Therefore, it has been considered to detect the rotational position of the turret plate by using a pattern light receiving element on the turret plate, and to electrically control it so that it does not rotate more than one rotation.
Ru.

However, in such a system, the turret plate may easily rotate more than one revolution due to noise or failure of the position detection circuit. In other words, the reliability is poor, and the lead wire of the emergency light may break, leaving a risk of electric shock.

The present invention was made by paying attention to the above-mentioned circumstances.
The purpose is to prevent noise and position detection circuit failures.
The object of the present invention is to provide a light source device that prevents the turret from rotating more than one rotation even in the event of a malfunction, thereby ensuring that the lead wire of the emergency light will not break and result in an electric shock. An embodiment of the invention will be described based on the drawings.

Reference numeral 1 in FIG. 1 is a front panel of a light source device for an endoscope, and a socket 2 is provided in a part of this front panel 1 to completely penetrate the socket. This socket 2 has an internal view (not shown).
A connector 3 provided at the extending end of the light guide cord is detachably attached. The light guide tube 4 hanging from the connector 3 is located above the output source J of the light source lamp 5, and the light is condensed by the condenser lens 6.
It has been received by many people. The condensing lens 6 is held by a lens frame 8 attached to a fixed frame 7. ``Furthermore, a circumferential portion of a disc-shaped turret 9 is interposed between the light source lamp 5 and the condensing lens 6 (1) above the upper emission path.

As shown in FIG. 2, around the turret 90, a plurality of filters 11 having different transmission characteristics and emergency lights 12 are attached at intervals along the circumferential direction of the turret 90. And, as mentioned later, Turret 9? By rotating, you can select all the filters 11... or emergency lights 12 to be used and select the output light path! It can be placed on top.

Also, the emergency light 120 part has a reflector of 13 power! It is called preparedness. Furthermore, the socket part 1 attached to the emergency light 12
Lead #4! 15.15 is connected, and the other end of each lead 15.15 is led to a power source section (not shown). Further, the turret 9 is rotatably supported by a bearing 18 held on a support plate 17. and,
It is rotationally driven by the drive motor 21 via the vehicle train 19'ff. In addition, a drive device rI that rotates on this turret 9'
By controlling the operating sound of the drive motor 21, the drive motor t can be rotated in forward and reverse directions, and an arbitrary rotational position aiv can be selected.

Furthermore, a receiving bar 22 that protrudes toward the fixed frame 7 is fixedly attached to the periphery of the turret 9. A stopper 23 is provided on the fixed frame 7, located on the locus of movement of the receiving bar 22, and consisting of nine upright plates formed by cutting and raising the plate portions of the fixed frame 7. "are doing.

However, even if the turret rotates in the direction of turret 911-Izuo, Part 1 [! After 21 turns, the receiving bar 22 always rests on the topper 23, which prevents further turns. Furthermore, the receiver is on the movement locus of the bar 22, and the stopper 23 is located on both sides.
is located so that the receiving bar 22 operates the switch 24, 25' just before it hits the stopper (23). The receiving bar 22 is initially connected to the switch 24.2.
5, and then hit the stopper 23.

Further, as shown in FIG. 1, a shutter blade 26 and an aperture p blade 27 are provided above the exit 'x path on the exit side of the condensing lens 6.6.
8 causes the aperture blades 27 to be driven by the potentiometer 29.

On the other hand, the rotational position of the turret 9 is determined by detecting the position using the following detection means and controlling the drive motor 2). That is, as the detection means, an identification mark corresponding to the valley filter 11 and the emergency light 12 is provided on one side of the desk 3 which is fixedly attached to the rotating shaft of the turret 90, and an identification mark corresponding to the valley filter 11... 32 mark reading detectors are installed, and the desired filter 1 is installed.
1...or emergency light 12 is the output light path! When it is located above, the corresponding identification mark 1 is read and the drive motor 21 is stopped by receiving this read signal.

Further, the disk 31 is provided with a termination indicating mark at a position read by the mark reading detector 32 immediately before the receiving bar 22 reaches one of the switches 24e and 25. When the end indication mark is read, the turret 9 is rotated in the opposite direction. In other words, the switches 24 and 25 are not operated as long as they are operating normally. Note that 33 in FIG. 1 is a circuit board, and this circuit board 33 and the reading detector 32 are supported by the support plate 17.

Next, the operation of the above configuration will be explained.

Insert the 3 connectors of the scope into socket 2 and attach it.
When the Motoei lamp 5 is turned on, the emitted light is the emitted optical path!
After passing through one of the filters 11 located above, it is focused by the focusing lens 6.

Head towards the light guide tube 4. However, normally the shutter blade 26 is closed and the exit optical path is closed! Since it is located above, the light is blocked by the shutter blade 26 and does not enter the light guide tube 4. Note that the diaphragm blades 27 perform sufficient aperture to regulate the amount of emitted light.

On the other hand, when the filters 11... are switched off and the light source lamp 5 is switched off, 12 emergency lights are output from the optical path! This operation is performed by the drive motor 2 as mentioned above.
1 and rotates the turret 91 via the gear train 19, the selected filters 11... or 12 emergency lights are positioned above the emission source path. The turret 9 can be rotated in either forward or reverse directions to select ftk.

By the way, the drive motor 21 of the mark reading detector 32 or the like may malfunction due to noise or a malfunction, causing the turret 9 to attempt to rotate more than one revolution even though it is not necessary.

In such a case, rL, I are regulated as follows.
Rotation of Ig more than one rotation is prevented. In other words, if the second
Rotating in the direction of the solid line arrow shown in Figures and Figure 3,
Then, first, the receiving bar 22 first touches the first switch 2.
4 actuator 24B, and the first switch 24
Manage the meeting. The signal from the first switch 24 activates a control circuit (not shown), causing the drive motor 21 to operate in reverse. Thus, before the receiving bar 22 hits the stopper 23, the turret 9 rotates in the opposite direction to the direction in which it has rotated up to that point. Then, it is possible to return to normal operation, and if the abnormality remains, turn the second switch 25 once in the opposite direction. Operate and reverse rotation again.

Also, even if the first or second switch 24, 25F is operated, if the turret 9 continues to rotate in the same direction,
The bar 22 of the receiver hits the stopper 23 and stops completely.

Therefore, ensure absolute safety.

As explained above, in the present invention, the turret is absolutely prevented from rotating more than one rotation by using the switch and stopper for preventing rotation of the turret. Therefore, the red lead of the emergency light provided on the turret is disconnected, causing an electric shock. Risks such as this can be prevented. Furthermore, since the device is provided with dual rotation prevention means of the switch and the stopper, reliability and safety against failure thereof are high.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a side view of the main parts thereof, FIG. 2 is a front view of the turret part, and FIG. 3 is a perspective view of the rotation prevention mechanism. 5... Light source lamp, 9... Turret, 12...
Emergency light, 15... Lead wire, 22... Reception is bar, 2
3...Stopper, 24...First switch, 25.
...Second switch, 1... Output optical path. Applicant's agent Patent attorney Takehiko Suzue Figure 2 Figure 3

Claims (1)

[Claims] A light source lamp that emits illumination light to an output optical path, and a lead mv
r; a rotatable turret that holds and rotates which emergency light to position the emergency light on the outgoing light path; a drive device that drives the turret in full rotation; a receiving bar; a stopper installed on the movement trajectory of the receiving bar; the receiving bar hits the bar and prevents further rotation of the turret;
Before the bar hits this stopper, the holder is operated by the member on the turret side, so that the rotation ends. A Jb source radiation source device characterized by comprising: a detection switch; and a control means for regulating the operation of the drive device so that the turret does not rotate more than 11 g when the switch is operated.