JPH0131241B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a light source device for an endoscope, for example, for sending illumination light to an endoscope.

[Background Art of the Invention and Problems thereof] In recent years, high-intensity lamps have been developed and put into practical use, but the higher the brightness of the lamp, the greater the amount of heat generated when the lamp is lit. In this case, the body of the high-intensity lamp itself becomes particularly hot. For this reason, it has been proposed to use the member that holds the lamp as a heat sink to achieve thermal cooling (Utility Model Publication No. 58-25582,
(See Japanese Patent Application Laid-Open No. 1983-67232).

However, the exit end of the lamp body tends to become particularly hot during lighting, but in the above structure, the heat sink is only joined to the outer peripheral surface of the lamp body, so the heat conduction to the heat sink does not increase the amount of heat generated. Comparatively not enough.

Therefore, when the lamp is turned on, the temperature near the exit end of the lamp body becomes particularly high, which poses a problem.

[Object of the invention] The present invention has been made focusing on the above circumstances, and
The purpose of this is to dramatically improve the cooling efficiency of the lamp body, particularly in the exit side portion, while having a relatively simple structure.

[Summary of the Invention] The present invention provides a light source device for an endoscope in which the lamp body of a light source lamp is cooled by transmitting heat from the lamp body to a heat radiating member. A heat dissipating member that supports the lamp body, an insertion groove formed along the entire circumference of the edge of the lamp body on the exit window side, and a protrusion inserted into the insertion groove, and the heat dissipation member has The lamp includes a movably fitted ring member, and a biasing elastic member that elastically biases the ring member to push the protrusion into the insertion groove and bring the lamp body and ring member into close contact. This is what I did.

Thus, a ring member having a protrusion to be inserted into an insertion groove formed along the entire circumference of the edge of the lamp body on the side of the exit window is fitted onto the heat dissipation member, and the ring member is elastically Since the protrusion is pushed into the insertion groove by force and the lamp body and ring member are brought into close contact with each other, the heat of the lamp body can be efficiently transferred to the heat radiating member through the ring member.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on the drawings. FIG. 1 shows a light source lamp unit 1 incorporated into an endoscope light source device.
A light source lamp 4 made of a xenon lamp is held within the lamp house 2 by a holding mechanism 3, which will be described later.

This light source lamp 4 has an exit window 6 formed at one end of a cylindrical lamp body 5, and a first base 7 at the other end. This first cap 7
It has a two-stage structure consisting of a small diameter part 8 located at the outermost end and a large diameter part 9 continuous to the inner side. Further, a large-diameter second cap 11 is formed on the outer circumferential portion of the lamp body 5 on the side of the injection window 6 . A plurality of screw holes 12 are provided on the end surface of the small diameter portion 8.
...is being formed. Furthermore, the first base 7
A discrimination cap 13 is selectively attached to the light source lamp 4 according to the type of light source device incorporating the light source lamp 4.
is fitted. This discrimination cap 13 completely covers the first cap 7 and is tightly fitted onto the large diameter portion 9 thereof. This cap 13 is tightened and fixed by a tightening band 14.

Further, as shown in FIG. 3, an insertion groove 15 is formed along the entire circumference of the end edge of the lamp body 5 on the side of the exit window 6. A protrusion (portion) 17 provided on a ring member 41 that fits into a heat radiation tube 16 as a heat radiation member, which will be described later, is fitted into the insertion groove 15 so as to come into contact therewith.

On the other hand, the holding mechanism 3 is constructed as shown in FIG. That is, bases 18 and 19 made of electrically insulating material are installed at the upper and lower parts of the lamp house 2, respectively, and the bases 18 and 19 are connected to the lamp house 2 by respective setscrews 20. Mounted and fixed. Also,
A pair of heat sinks 21 and 22 are installed between the bases 18 and 19 in a spaced-apart manner, respectively. And each heat sink 21, 2
Both ends of 2 are attached and fixed to the bases 18, 19 by attachment screws 23. Each of the heat sinks 21, 22 has a large number of radiation fins 21a, 22a, .

The lamp body 5 is attached to the rear heat sink 22.
A first mounting hole 24 into which the first cap 7 is fitted is formed. The size of the first mounting hole 24 varies depending on the type of the light source device, and there is a size that allows the above-mentioned discrimination cap 13 to be tightly fitted (as shown in the drawing), and a size that allows the first cap 7 to have a small diameter. The size is selected depending on the size (not shown) that allows the portion 8 to be tightly fitted. A fastening screw 25 that is fitted into the first mounting hole 24 and passes through the heat sink 22 is screwed into the screw hole 12 and fastened to the heat sink 22.

A second mounting hole 26 through which the heat sink 16 passes is formed through the front heat sink 21 . The rear end of the heat dissipation tube 16 is connected to the second base 1 of the lamp body 5.
It is fitted onto the outer periphery of 1. Furthermore, the heat sink 16
A male thread 27 is formed on the outer periphery of the rear end.
The heat sink 21 is fixed by screwing the male screw 27 into the second mounting hole 26 of the heat sink 21.

Further, as shown in FIG. 3, a ring member 41 is slidably fitted into the inner hole of the heat dissipation tube 16 in close contact with the inner hole. Furthermore, a protrusion 17 is formed along the inner circumference of one end of the ring member 41 to fit into and abut the insertion groove 15, and this protrusion 17 is formed in the insertion groove 1 of the lamp body 5.
The ring member 41 is inserted into the interior of the lamp body 5, and one end surface of the ring member 41 is pressed against the exit side edge of the lamp body 5. In order to enhance the thermal coupling with the lamp body 5 in this manner, a coil spring 45 for urging the ring member 41 toward the lamp body 5 is disposed inside the heat dissipation tube 16. Note that a heat ray absorbing filter 46 is attached to the ring member 41. Also,
A plurality of heat radiation fins 32 are provided on the outer periphery of the heat radiation tube 16.
...is provided.

On the other hand, an opening window 33 is formed in the front wall of the lamp house 2 corresponding to the exit end of the light source lamp 4, and another heat ray absorbing filter 34 is disposed in the opening window 33. That is, this filter 34 is fitted into the mounting frame 35. Further, the filter 34 is divided into two parts, an upper part and an upper part, and the upper end part is pressed by a pressing spring 36. In other words, this filter 34 has two upper and lower parts.
Since the light source lamp 4 is divided into two parts, even if it is heated when the light source lamp 4 is turned on, no large distortion occurs, and durability can be improved.

Further, as shown in FIG. 2, a cooling fan 37 is installed at the side of the light source lamp 4.
Air is blown onto the light source lamp 4, the heat sink 16, and each heat sink 21, 22 to cool them.

According to the above configuration, the lamp body 5 and the heat dissipation tube 16 are also thermally connected by the ring member 41. That is, the protrusion 17 of the ring member 41 is fitted into the insertion groove 15 on the lamp body 5 side, and since the lamp body 5 and the ring member 41 are pressed against each other, the thermal coupling between them is enhanced. Therefore,
The heat dissipation effect of the emission side edge of the lamp body 5, which is said to be heated most during steady lighting, is improved.

Therefore, the temperature around the injection end of the lamp body 5 increases.
The temperature fell below 90℃. Incidentally, in the case of the conventional method in which the heat dissipation tube 16 and a projection 17 are provided thereon and the projection 17 is not fitted into the insertion groove 15 of the lamp body 5, the temperature at the same location is 170°C.
Of course, with the above configuration, other parts of the lamp body 5 are lowered further.

[Effects of the Invention] As explained above, although the present invention has a relatively simple structure, it can dramatically improve the cooling efficiency of the lamp body, especially the injection side portion which is most likely to reach high temperature.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a light source lamp section in an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof.
FIG. 3 is a side sectional view of the main parts in the same embodiment. 1...Light source lamp part, 4...Light source lamp, 5...
... Lamp body, 6 ... Injection window, 15 ... Insertion groove, 16 ... Heat dissipation tube, 17 ... Projection, 41 ... Ring member, 45 ... Coil spring.

Claims (1)

[Claims] 1. A light source device for an endoscope that cools the lamp body by transmitting heat from the lamp body of the light source lamp to a heat radiating member, which includes a lamp body provided with an exit window at one end, and a heat radiating member that supports the lamp body. and an insertion groove formed along the entire circumference of the edge of the lamp body on the exit window side, and a protrusion inserted into the insertion groove, and is movably fitted to the heat dissipation member. An interior characterized by comprising a ring member and an elastic member for urging the ring member elastically to push the protrusion into the insertion groove and bring the lamp body and the ring member into close contact. Light source device for endoscopy.