JPH06118312A - Light source unit - Google Patents

Abstract

PURPOSE:To provide a light source unit is reduced whose by cutting off electric power supply to a heat sink without using an interlock switch while holding a light source lamp when the light source lamp is replaced. CONSTITUTION:The light source unit 10 converges the light beam of the light source lamp, arranged in the unit, through a lens and connects it to a connector 11 to light a part to be observed through a light guide in a fiber scope. When the light source lamp is replaced, a lamp replacement door 12 is detached and the light source lamp held by the heat sink is replaced. The lamp replacement door is made freely detachable from the light source unit by using a knob for replacement door fixation. The lamp replacement door detached from the light source unit is provided with a cathode-side contact 16 and an anode-side contact 17 as electric contact parts at the tip part of an insulating member 18 made of resin, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source device which is connected to an endoscope and outputs illumination light.

[0002]

2. Description of the Related Art By inserting an elongated insertion portion into a body cavity, various treatments and treatments can be performed by observing an organ in the body cavity and, if necessary, inserting a treatment instrument into a treatment instrument channel. Endoscopes are widely used. Further, not only in the medical field but also in the industrial field, industrial endoscopes for observing and inspecting scratches and corrosion inside boilers, turbines, engines, chemical plants and the like are widely used.

Conventionally, a light source device for supplying illumination light to an endoscope has a structure in which a light source lamp such as a xenon lamp is held on a heat sink while the heat sink is energized to supply power to the light source lamp. Has become. When replacing the light source lamp, the lamp replacement door is opened, the light source lamp is taken out together with the heat sink, and the light source lamp is replaced. For this reason, the heat sink capable of supplying power is exposed when the lamp replacement door is opened. Therefore, an interlock switch is provided to stop the power supply to the heat sink when the replacement door is opened. In addition, an interlock switch for discharging electric charge stored in a capacitor connected in parallel with the light source lamp and preventing electric shock was also provided.

As shown in FIG. 30, in a light source device 1, a light source lamp 2 such as a xenon lamp is held on a heat sink 3 and a lamp replacement door 4 is connected to a light source cover 5 so as to be openable and closable by a hinge or the like not shown. Was. Then, by opening and closing the lamp exchange door 4, the push plate 6 provided in the light source device 1 is moved to turn on / off the interlock switch 7 fixed by spot welding or the like.

That is, when the lamp replacement door 4 is closed, the lamp replacement door presses the push plate 6 to turn on the interlock switch 7, so that power is supplied to the light source lamp 2 to enable lighting. . However, when the lamp replacement door 4 is opened, the pressing force on the pressing plate 6 is released, so the interlock switch 7 is turned off and the power supply circuit to the light source lamp 2 is cut off. It will be in a safe state.

[0006]

However, in order to open / close the lamp replacement door to move the push plate to turn on / off the interlock switch, a large space is required.

Further, since the power supply circuit to the light source lamp is cut off by turning on / off the interlock switch, it is possible to prevent the safety when the interlock switch fails in case of failure. Moreover, it was necessary to make the transformer in the switching power supply a reinforced insulation structure. For this reason, there is a problem that the transformer becomes large because it is necessary to set the creepage distance between the windings by a predetermined dimension in order to secure the insulation of the primary circuit and the secondary circuit required for safety standards. .

Further, in order to prevent electric shock due to the electric charge of the capacitor provided in the secondary circuit, an interlock switch for discharging the electrification of the capacitor and a space therefor are required.

The present invention has been made in view of these circumstances. When the light source lamp is replaced, the light source lamp is held while the heat sink serving as a power supply circuit for the light source lamp is powered by an interlock switch. It is an object of the present invention to provide a light source device that is cut off without using and has a small shape.

[0010]

A light source device according to the present invention is a light source device for supplying illumination light to an endoscope which is inserted into a body cavity or a lumen for inspection, observation or treatment. A lamp replacement door that is attached and detached when the light source lamp mounted inside is attached and detached is provided with an electrical contact portion, which is an electrical connection portion of a power supply circuit to the light source lamp, at an end portion of the insulating member via an insulating member.

[0011]

With this structure, when the light source lamp is replaced, if the lamp replacement door is removed from the light source device, the power supply circuit to the light source lamp is cut off. Then, after replacing the light source lamp, when the lamp replacement door is attached to the light source device, the power supply circuit for the light source lamp is restored.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 relate to an embodiment of the present invention.
Is a perspective view showing a light source device and a lamp replacement door, FIG. 2 is an overall view of the light source device, FIG. 3 is a cross-sectional view of an anode side of the light source device,
FIG. 4 is a plan sectional view of the light source device, and FIG. 5 is a sectional view of the light source device on the cathode side.

As shown in FIG. 2, the light source device 10 collects light from a light source lamp such as a xenon lamp arranged in the device through a lens and connects it to a connector 11 to provide a light in a fiberscope (not shown). The observation part is illuminated via the guide. Further, when replacing the light source lamp, the light source lamp held by the heat sink can be replaced without removing the lamp replacement door 12.

That is, as shown in FIG. 1, the lamp replacement door 12 is detachable from the light source device 10 by removing the replacement door fixing knob 35. Then, in the lamp replacement door 12 removed from the light source device 10, the cathode side contact 1 serving as an electrical contact part is formed at both ends formed by cutting out the end of the insulating member 18 made of resin or the like into a substantially U shape.
6 and the anode side contact 17 are provided.

Further, as shown in FIG. 3, the anode side heat sink 14 and the metallic anode hashler 19 for fixing the anode side heat sink 14 are fixed to the base plate 21 formed of resin of the light source device 10. ing.

A step is formed and a through hole is provided at the tip of the insulating member 30 of the lamp replacement door 12 to be removed when replacing the above-mentioned light source lamp.
The anode side contact point 17 and the cathode side contact point 16 are screwed so as to be movable via a collar 24 which is about 1 mm higher.

The anode heat sink 14 fixed to the anode hashler 19 has a blind hole for press-fitting a taper pin 23 for guiding the heat sink 14 to a predetermined position and a mounting shaft for positioning and fixing. A through hole formed so that the maximum clearance for inserting 30 is 0.1 or less, and a through hole having a larger clearance for inserting the mounting shaft 31 are provided. In addition, the heat sink 14 is inserted through the through hole.
Mounting shafts 30 and 3 for fixing the
A male screw is formed at the front end of 1, and a knob 29 made of heat-resistant resin is attached to the head integrally with the shafts 30 and 31.

When attaching the heat sink 14 to the anode hashler 19, first the heat sink 14 is attached.
The taper pin 23 press-fitted in is inserted into the guide hole of the anode hashler 19, the shaft 31 is temporarily tightened, and then the shaft 30 and the shaft 31 are finally tightened in this order for positioning and fixing.

Subsequently, as shown in FIG. 4, the lamp house 13 formed of a heat resistant resin is fixed to the base plate 21 with screws. The anode side relay electrode 25 and the cathode side relay electrode 34 are movably attached to the through hole provided in the lamp house 13 via the collar 26, while the anode side relay electrode 25 and the cathode side relay electrode 34 are connected to the lamp. A compression spring 27 provided between the spring retainer 28 screwed to the house 13 and the relay electrodes 25 and 34 constantly presses in the lamp replacement door direction.

On the other hand, as shown in FIG. 5, the cathode-side heat sinks 15a and 15b, which are divided into upper and lower parts, have a large clearance so that they can be moved back and forth and left and right in the metal cathode hasher 42 having conductivity. The shaft 30 'is inserted into the through hole and fixed by screws.

As shown in FIGS. 3 and 5, the light source lamp 45 is positioned and fixed to the anode-side heat sink 14 with three screws and is positioned between the cathode-side heat sinks 15a and 15b which are vertically divided. It is arranged to do. The cathode-side heat sinks 15a and 15b are screwed and coupled to each other through the leaf spring 41 so that they can be opened and closed freely, while the lamp-exchange door side is fastened with a patch jaw 43. I'm trying to fix it.

Further, as shown in FIG. 4, the anode side wiring 32 and the cathode side wiring 33 extended from a starter substrate (not shown) for generating a high voltage for lighting the light source lamp 45 are the anode side relay electrodes 25. And the cathode-side relay electrode 34, respectively.

The shaft 36 for fixing the lamp replacement door 12 has a male screw formed at the tip thereof, and the knob 35 is integrally fixed to this shaft.

Now, the operation of the lamp replacement door 12 attached to the light source device 1 will be described. First, the lamp replacement door 1
2 is attached to the light source device 10, the anode side contact 17 and the cathode side contact 1 arranged at the tip of the insulating member 18 attached to the lamp replacement door 12.
6 is inserted to a predetermined position of the lamp house 13 arranged at a predetermined position of the light source member. And the lamp replacement door 1
Rotate the knob 35 located on the outer side of the anode 2
9 and the female screw provided on the cathode hasher 42, the shaft 3
A male screw provided at the tip of 6 is fixed and attached at a predetermined position.

As described above, by mounting the lamp replacement door 12 on the light source device 10, the anode side contact 17 is formed.
Since the cathode side contact 16 is arranged at a predetermined position,
An anode side power supply circuit that passes through the anode side wiring 32, the anode side relay electrode 25, the anode side contact 17, the anode hasher 19, and the anode side heat sink 14 is configured, and similarly, the cathode side wiring 33 and the cathode side relay electrode 34. , Cathode side contact 16 and cathode side 4
2. A cathode side power supply circuit passing above and below the cathode side heat sink 15 can be configured.

Further, when replacing the light source lamp 45, by removing the lamp replacement door 12 from the light source device 10, the anode side contact 17 and the cathode side contact 16 are separated from the anode side and cathode side power supply circuits configured as described above. The heat sinks 19 and 42 for holding the light source lamp 45 are separated from each other and the power supply circuit to the light source lamp 45 is cut off.
Since the supply of electric power to the lamp is stopped, there is no danger of electric shock when replacing the lamp, and the light source device 10 can be downsized by downsizing the transformer and eliminating the interlock switch.

The anode-side contact 17 and the cathode-side contact 16 provided at the tip of the insulating member 18 that abuts on the anode-side relay electrode 25 and the cathode-side relay electrode 34 are movably attached to cause variations in the dimensions of the parts. It can absorb rattle.

Further, since the anode side relay electrode 25 and the cathode side relay electrode 34 are constantly pressed against the lamp replacement door side by the compression spring 27, the anode side contact 17 and the cathode side contact 16 have some dimensional variations. Can be surely connected.

A washer, a spring washer, and a washer are sequentially arranged between the knob 35 and the insulating member 18 so that the lamp replacement door 12 can be securely attached to the lamp house 13.

FIGS. 6 and 7 relate to a modification of the patch-nail, and FIG. 6 is a cross-sectional view of the cathode side heat sink portion.
Is an enlarged view of the patch. As shown in FIG. 5, the cathode side heat sink 15a for holding the light source lamp.
15 and 15b are fixed by tightening with a patch jaw 43. However, when the light source lamp is replaced, the lamp replacement door 12 does not remain even if the patching jaw 43 is forgotten to be closed.
I was able to attach.

Therefore, as shown in FIGS. 6 and 7, in the present embodiment, the pressing plate 51 is attached so as to cover the patch jaws 43 '. The other structure is the same as that of the above embodiment.

By covering the patch jaws 43 'with the pressing plate 51 as described above, if the patching jaws 22 are forgotten to be closed after the light source lamp is replaced, the pressing plate 5
The patch light 13 'does not drop by 1 and stands upright between the cathode side heat sinks 15a and 15b and abuts the lamp replacement door 12 so that the lamp replacement door 12 cannot be attached to the light source device body. Since the lamp can be securely fixed, safety is improved.

As shown in FIGS. 8 and 9, by forming the patch jaws 53 and the pressing plate 52 so that the patch jaws 53 separated from the pressing plate 52 stand upright. You can get the same effect as.

By the way, as shown in FIG. 10, the signal line 62 is conventionally passed through the insertion path of the ferrite core 63, and the ferrite core is screwed to the side of the shield member 61 of the electronic device to propagate the signal line 62 and the like. It is known to remove the leaking noise. However, in the above technique, the ferrite core 63 and the shield member 61
It was not possible to remove the noise because it leaked from the gap.

Therefore, the noise leaking from the signal line of the electronic device may be removed by the following structure, and the ferrite core may be fixed to the shield member.

As shown in FIG. 11, when the ferrite core 63 having the insertion passage 65 for passing the cable 62 for supplying electric power or a signal is formed in the upper part of the shield case 61 at the substantially center, the cable 62 is inserted. Insertion passage 66
With a convex metal case 64 provided with a ferrite core 63
The metal case 64 and the shield case 6
1 is fixed with a mounting screw 67.

With the above-mentioned structure, the shield case 61 shields noise from the noise source, while the metal case 64 inserts power into the ferrite core 63 or a cable 62 for supplying a signal. It is possible to remove the noise that propagates through and leaks and the noise that leaks from the shield case 61.

Further, as shown in FIG. 12, by disposing a shock absorbing material 68 such as urethane, rubber or styrofoam on the inner surface of the above-mentioned metal case 64, noise propagating through the cable 62 for supplying electric power or signal is provided. Also, noise leaking from the ferrite core 63 and the shield case 61 can be more effectively shielded.

Further, as shown in FIG. 13, a ferrite core 63 having an insertion passage 65 through which a cable 62 for supplying electric power or a signal is formed is formed in a substantially central portion of a cylindrical or cubic metal having an opening. The metal case 64 'is covered with a case fixing member 69 having a substantially convex top and bottom, and the side surface of the metal case 64' and the upper surface of the shield case 61 are fixed with screws 71 and 70. Fix it.

In this way, the shield case 61 shields noise from the noise source, the ferrite core 63 removes noise propagating through the cable 62 for supplying electric power or a signal, and the metal case 64 'serves as the shield case. The noise leaking from 61 and the noise leaking from the ferrite core 63 can be shielded.

As shown in FIG. 14, a shock absorbing material 68 such as urethane, rubber or styrofoam can be provided on the inner surface of the metal case 64 'of FIG. 13 to further effectively shield noise.

Further, by providing the shield case shown in FIG. 11 with a screw portion as shown in FIG. 15, noise leakage from the shield case 61 can be more effectively shielded. Other configurations and operational effects are similar to those of the embodiment shown in FIG. Further, as shown in FIG. 16, by providing a shock absorbing material 68 such as urethane, rubber or styrofoam on the metal case 64, noise can be effectively removed.

On the other hand, the electrode part and the cathode side heat sink lower part side can be configured as follows.

As shown in FIGS. 17 and 18, the heat sink 15a and the heat sink 15b on the cathode side are fixed by a patch jaw 43.
A side of the heat sink 15b and the side of the heat sink 15b opposite to each other are fixed by screws via a collar so that the spring member 41 can rotate. By rotatably fixing the light source lamp 45, the deformation of the light source lamp 45 due to product variation can be followed.

When fixing to the anode side of the light source lamp, the anode heat sink is fixed to the insulating plate and is fixed to this anode heat sink with three screws.
In this way, the cathode side of the unit to which the light source lamp is fixed is fixed by the shaft 77 in which the knob 75 is fixed to the cathode side electrode portion 80 in which the electrode contact portion 79 protruding from the cathode heat sink 15b is fixed to the insulating plate by screwing. The electrode portion can be connected to the electrode contact spring member 82 through the wire member 81 for supplying power to the lamp starter substrate (not shown) to supply power to the light source lamp 45.

If the knob 75 is not firmly fixed to the cathode side electrode portion 80 as shown in FIG. 18, the knob 75 is pushed outward by the urging force of the spring 78 and the cover member 7 is pressed.
The structure in which the shaft 77 is not contacted with and is not mounted inside can ensure the fixation by the shaft 77.

As shown in FIG. 19, a hinge 81 and a stepped screw 82 are used in place of the spring member 4 on the side of the anti-patching jaw 43 so that the heat sink 15a and the heat sink 15b on the cathode side can be freely rotated. It is also possible to fix the lamp 45.

Further, in the optical system of the conventional light source device, the lens, the diaphragm adjusting mechanism, etc. are arranged on the L-shaped plate member and fixed to the chassis, so that the optical system is shaken and the problem of the light quantity down occurs. Was there. Therefore, the light amount reduction can be reduced by configuring the optical unit section as follows.

As shown in FIGS. 20 and 21, the chassis 8
A lower end of the front panel 96 and a lower end of the top cover are fixed to the screw 8 by screws. A plate member 94 having a bent portion whose upper end is bent so as to be close to the front panel is fixed to the chassis 88 via a base plate 89. Further, a lens 91, a bracket 92 to which a diaphragm and splash drive mechanism is attached, and a scope connector 100.
An LG connector receiver 93, which is made of metal and has a cylindrical shape, is fixed to the plate member 94.

At the other end of the LG connector receiver 93, a resin cap 95 is screwed from the outside of the light source device so that the metal part of the LG connector receiver 100 does not project to the outside of the light source device. The restriction surface is provided near the front panel 96.

To attach the scope connector 100 to the light source device configured as described above, the scope connector 100 is attached to a resin cap 95 at L
It suffices to insert it into the G connector receiver 93 and insert the C ring 102 until it fits into the groove 99. When the scope connector 100 is fixed, the abutting surface 103 against the light source device presses the resin cap 95 and the resin cap 95 is fitted by the fitting force between the C ring 102 and the inner wall of the LG connector receiver 93. By pinching, the butting portion abuts against the regulation surface 95a of the resin cap 95 and the front panel 96.

When the scope connector 100 is detached from the light source device, the LG connector receiver 93 is provided by the force when the C ring 102 is disengaged from the groove 99 and the fitting force between the C ring 102 and the inner wall of the LG connector receiver 93.
Is pulled in the direction of arrow b and the LG connector receiving 93
The bent portion of the plate member 94 that is connected to the abutment portion abuts on the front panel 3.

As described above, even if the optical unit including the LG connector receiver 93, the lens 91, and the diaphragm adjusting mechanism connected to the plate member 94 is shaken by an impact when the scope connector 100 is attached or detached, By restricting the optical unit integrally by the restricting surface 95a and the bent portion 94a, the change in the light amount due to the deviation of the optical axis is reduced.

Further, by covering the metal LG connector receiver 93 with the resin cap 95 having a low heat conductivity, it is possible to make it difficult to transfer the heat from the light source lamp to the outside of the light source device.

Conventionally, in an endoscope light source device using a xenon lamp, the xenon lamp is supported by a heat sink and is radiated by the heat sink.
Although the heat sink was air-cooled by a cooling fan, the heat of the lamp could not be sufficiently dissipated due to fan failure or blockage of the duct, resulting in abnormal overheating, which could lead to accidents such as lamp damage. . Therefore, the safety can be improved by preventing the lamp from being damaged due to abnormal overheating as follows.

As shown in FIG. 22, as a conventional temperature detecting method, a heat compound 113 such as silicon grease having electrical insulation and heat conductivity is applied to the gap of the heat sink 110 for radiating the lamp, When a prescribed temperature is reached, a temperature switch 112 for closing the contact is embedded to detect the temperature. However, temperature detection varies due to the amount of heat compound 113 applied and the position where the temperature switch is embedded, and the heat sink is a current path to the lamp electrode, so that the temperature switch and the heat sink are reliably insulated. Since it was necessary, the work was complicated in terms of assemblability and repairability.

Since the heat sink 110 is pulled out together with the lamp when the lamp is replaced, the temperature switch 1
It was necessary to embed 12 into the heat sink support base 111 on the light source side for fixing the heat sink 110.

Therefore, there has been a demand for a lamp abnormal overheat detecting mechanism that reduces variations in detection, maintains electrical insulation, and is easy to assemble.

Then, as shown in FIGS. 24 to 26, when the heat sink 110 to which the light source lamp 45 is connected is inserted, the heat sink 110 comes into contact with the metal plate 117 having a spring property. The metal plate 117 is provided with a temperature switch 112 'whose periphery is covered with an insulating tube.

With the above configuration, the heat of the heat sink 110 is transferred to the temperature switch 117 via the metal plate 117. Further, since the metal plate 117 has a spring property, the contact area and the amount of pushing force to the heat sink when the heat sink 110 is inserted can be made the same, so that the temperature can be stably controlled. Further, the temperature switch 117 is electrically insulated from the heat sink 110 by an insulating tube.

As described above, even when the temperature of the lamp 45 and the heat sink 110 is abnormally increased due to the stop of the lamp cooling fan, the blocking of the cooling duct, etc., the heat is transferred to the metal plate 117 which is in contact with the heat sink 110. Further, heat is transferred to the temperature switch through the insulating tube to control the temperature. Therefore, the temperature switch 112 ′ is turned on before power is supplied to the lamp before the temperature rises to the temperature at which the lamp is damaged. You can stop.

As shown in FIG. 27, the upper surface of the heat sink 110 to which the lamp 45 is attached is obliquely cut, and the obliquely cut metal plate 122 is fitted to the surface, and the metal plate 122 is elastic rubber 123. When the heat sink 110 is inserted into the heat switch 110 by the elastic force of the heat sink 110, the heat is transmitted to the temperature switch 120 via the insulating sheet 121.
Since 10 and the tapered surface of the metal plate 122 are pressed against each other by widening the contact surface by the elastic force of the elastic rubber, the heat of the heat sink 110 can be more efficiently transmitted to the temperature switch to control the temperature.

Finally, as a method of notifying that the power cord of the electric device is connected to the commercial power source, the constant voltage circuit is operated by supplying the power source to supply the power to the indicator lamp such as the LED to light it. There is something. However, as shown in FIG. 28, when the DC output is taken out from the commercial power source 130, the AC is rectified by the rectifier 131, the primary smoothing capacitor 132 is used to remove the ripples, and the commercial power source is connected. The LED 138 was turned on. However, depending on the capacity of the electrolytic capacitor for rectifying and smoothing the commercial power source, the main switch 136 is turned off even when the power cord is unplugged from the power source and the power supply to the constant voltage circuit is cut off. In this case, the power consumption of the circuit in the device is not performed, so that the LED 138 of the power connection notification continues to light for a certain period of time.

Therefore, by changing the main switch 141 provided in the equipment and adding a dummy resistor 143, when the power supply to the circuit is suspended, the dummy resistor consumes power, When the power cord is unplugged from the commercial power source and the power to the equipment is cut off, the capacity of the smoothing capacitor is consumed by the dummy resistor and L
The ED turn-off time is shortened.

That is, when the LED 138 for notifying the connection of the power cord is lit by the rectified DC power source,
While the main switch 141 is turned on, the control circuit 142 for operating the DC-AC inverter 134 for main output is energized to obtain the main output.
A load such as a DC fan 137 in parallel with the control circuit 142 operates. Further, the main switch 141 is a double throw switch, and when in the off state, the discharge resistor 143.
(Dummy resistor).

In this way, when the power cord is unplugged and the main switch 141 is in the ON state, the DC fan 137.
In the circuit of FIG.
The turn-off time of 8 can be shortened.

[0067]

As described above, according to the present invention, when the light source lamp is replaced, the light source lamp is held, while the power is supplied to the heat sink which is a power supply circuit for the light source lamp by using the interlock switch. It is possible to provide a light source device that is cut off and has a small shape without being cut off.

[Brief description of drawings]

1 to 5 relate to an embodiment of the present invention, and FIG. 1 is a perspective view showing a light source device and a lamp replacement door.

FIG. 2 is an overall view of a light source device

FIG. 3 is a cross-sectional view of the light source device on the anode side.

FIG. 4 is a plan sectional view of a light source device.

FIG. 5 is a sectional view of the light source device on the cathode side.

6 to 9 relate to a modification of the patch-jaw, and FIG. 6 is a cross-sectional view of the heat sink on the cathode side.

[Fig.7] Enlarged view of Patch Jaw

FIG. 8 is a view showing the shape of a push plate of patch and jaw.

FIG. 9 is a diagram showing another configuration of the patch and jaw.

10 to 16 relate to a metal case for noise removal, and FIG. 10 is an explanatory view showing a relationship between a shield case and a noise removal core.

FIG. 11 is a view showing a state in which a noise removal core is covered with a convex metal case.

12 is a view showing a state where a vibration absorbing member is arranged on the inner surface of the metal case of FIG.

FIG. 13 is a view showing a state in which a metal case is fixed via a holding member.

14 is a view showing a state where a vibration absorbing member is arranged on the inner surface of the metal case of FIG.

FIG. 15 is a diagram in which a screw portion for fixing the metal case is provided in the shield case.

16 is a view showing a state in which a vibration absorbing member is arranged on the inner surface of the metal case of FIG.

17 to 19 relate to a cathode side heat sink, and FIG. 17 is an explanatory view showing a fixed state of an upper heat sink and a lower heat sink and a fixed state of a lower heat sink and an electrode portion.

FIG. 18 is an enlarged view of the fixing portion between the lower heat sink and the electrode portion in FIG.

FIG. 19 is an explanatory view showing a fixed state of the upper heat sink and the lower heat sink on the anti-patching jaw side.

20 and 21 relate to an optical system of a light source device, and FIG. 20 is a sectional view showing an optical system of a light source device.

FIG. 21 is an explanatory view showing the connection between the light source device and the scope connector.

22 to 27 relate to temperature management of a heat sink, and FIG. 22 is an explanatory side sectional view showing a temperature measurement state of a conventional heat sink.

FIG. 23 is an explanatory plan sectional view showing a temperature measurement state of a conventional heat sink.

FIG. 24 is a view showing a state in which a metal plate is pressed against the side surface of the heat sink to measure the temperature.

FIG. 25 is an enlarged plan view of the temperature measuring unit.

FIG. 26 is an enlarged side view of the temperature measuring section.

FIG. 27 is a diagram showing another example of the method for measuring the temperature of the heat sink.

FIG. 28 is a circuit diagram showing a conventional LED extinguishing circuit.

FIG. 29 is a circuit diagram showing an LED extinguishing circuit of this embodiment.

FIG. 30 is an explanatory diagram showing a schematic configuration of a conventional light source device.

[Explanation of symbols]

 10 ... Light source device 12 ... Lamp replacement door 18 ... Insulating member 16 ... Cathode side contact (electrical contact part) 17 ... Anode side contact (electrical contact part)

Front page continuation (72) Inventor Masanobu Koitabashi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inoue Tsugukyu Sasai 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industry Co., Ltd.

Claims (1)

[Claims] 1. Insertion into a body cavity or a lumen for inspection, observation,
Alternatively, in a light source device that supplies illumination light to an endoscope to be treated, a light source lamp is attached to the tip of the insulating member via an insulating member in a lamp replacement door that is detached when the light source lamp mounted in the light source device is replaced. A light source device, comprising: an electrical contact portion serving as an electrical connection portion of a power supply circuit to the power source.