JP2542136B2 - Light source - Google Patents

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 Generally, in a light source device using a high-intensity lamp, a heat sink, which is a heat-dissipating member for cooling the high-intensity lamp that becomes high in temperature when the lamp is turned on, is used as a holding member for the lamp. A holding mechanism serving as a lamp house is provided inside the light source device in order to hold the lamp and the heat sink while insulating the light source device.

As a structure of such a light source device, for example, as disclosed in Japanese Patent Laid-Open No. 3-146026,
In some cases, a split heat sink holds both electrode portions of the lamp. In this technique, since heat sinks of different electrodes are arranged to face each other in one lamp house, a certain gap is provided between heat sinks of different electrodes to maintain insulation.

By the way, in recent years, there has been a demand for higher brightness of the light source device, and in order to meet this demand, there is a technique for increasing the current supplied to the lamp within a range where there is no problem in terms of lamp durability. Being tried.

[0005]

However, if the current supplied to the lamp is increased with the structure of the heat sink and the lamp house of the conventional light source device increased, the amount of heat generated by the lamp increases and sufficient heat cannot be dissipated. Therefore, even if an attempt is made to improve heat dissipation by using a powerful fan for cooling the heat sink, there is a mechanical and electrical limit, and sufficient heat dissipation cannot be obtained.

Further, even if the heat sink is made large to improve heat dissipation, the gap between the heat sinks of different electrodes needs to be larger than a certain space distance in order to maintain electric insulation, so that the gap should be made large outside. I have to.

That is, in order to improve the heat dissipation by enlarging the heat sink, the outer diameter of the heat sink must be increased, which causes the lamp house and hence the light source device to be upsized.

The present invention has been made in view of the above circumstances, and it is possible to sufficiently secure electric insulation without enlarging the heat sink to the outside, and it is possible to sufficiently cool a lamp having a large amount of heat generation. The purpose is to provide.

[0009]

In order to achieve the above object, a light source device according to the present invention has a plurality of heat dissipating members for holding a light source lamp, the opposing surfaces of which extend in directions close to each other to form a heat dissipating portion. An insulating member is arranged in the gap between the heat radiating portions.

[0010]

[Operation] In the above-mentioned structure, the heat dissipating portions are formed by extending the facing surfaces of the plurality of heat dissipating members for holding the light source lamp in the direction of being close to each other, and the heat dissipating portions also dissipate heat.

Even when the heat radiating portions are extended in the direction of being close to each other, sufficient insulation is obtained because the insulating member is arranged in the gap between the heat radiating portions.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

First Embodiment FIGS. 1 to 6 show a first embodiment of the present invention, FIG. 1 is a view in the direction of arrow B in FIG. 2, FIG. 2 is a plan view of a light source lamp section, and FIG. 2 is a sectional view taken along line AA of FIG. 2, FIG. 4 is a sectional view taken along line CC of FIG. 2, FIG. 5 is an external perspective view of a light source device shield case, and FIG.

In these drawings, reference numeral 1 denotes a light source lamp section, and the light source lamp section 1 is provided with an upper lamp house 2, a lower lamp house 3, and a substrate housing case 4.

The upper lamp house 2 is composed of an insulating member, and is formed so that the top plate 2a and the side plates 2b and 2c have a substantially U-shaped cross section, and one side plate 2b has a lower edge portion. An upper filter window 5a is formed by cutting out a part.

Similarly, the lower lamp house 3 is also made of an insulating member, and the bottom plate 3a and the side plates 3b and 3c are formed so as to have a substantially U-shaped cross section, and one side plate 3b has an upper side. A part of the edge is cut out to form a lower filter window 5b.

.. are provided at the lower edges of the side plates 2b, 2c, and at the upper edges of the side plates 3b, 3c at positions corresponding to the fixed legs 6, 6 ,. Fixed legs 7, 7, ... Are provided. The fixing legs 6, 7, ... Are pierced by fixing members 8, 8, ..., such as screws, and screwed into the fixed legs 7, 7 ,. 3 and can be fixed,
When the light source lamp unit 1 is integrally assembled, it has a box shape with both ends opened.

Further, in the state where the light source lamp unit 1 is integrally assembled, the upper filter window 5a and the lower filter window 5b are combined into one filter window 5 as shown in FIG.
The filter window 5 is provided with an infrared cut filter 10 for removing infrared rays from the illumination light by using the groove 9 as a guide.

A fan nozzle 12 for holding a cooling fan 11 is provided on one opening side of the light source lamp section 1. The cooling fan 11 has a square shape and an outer shape larger than that of the light source lamp unit 1. Further, the fan nozzle 12 has a frame shape and is configured such that the diameter thereof is expanded from one end portion (the center side of the light source lamp portion 1) to the other end portion. The light source lamp unit 1 has a quadrangle substantially the same as the outer shape, and the other end has a quadrangle substantially the same as the cooling fan 11.

Further, at one end of a quadrangle substantially the same as the light source lamp section 1, an upper engaged portion 13a and a lower engaged portion 13b are formed in the upper and lower portions, respectively. The engaged portion 13a includes an engaging portion 14a provided on the upper lamp house 2 and a lower engaged portion 13b.
Are attached to the engaging portions 14b provided on the lower lamp house 3 so as to be sandwiched when the upper lamp house 2 and the lower lamp house 3 are fixed. still,
The cooling fan 11 and the fan nozzle 12 are fixed by fixing members 15, 15, ...

In the light source lamp section 1, the light source lamp 1
Heat sinks 17, 18, 19, and 20 as conductive heat radiating members for radiating the heat of No. 6 are provided in two rows. That is, one row is provided with the heat sink 17 on the cooling fan side and the heat sink 18 is provided on the side opposite to the cooling fan, and the other row is provided with the heat sink 19 on the cooling fan side.
However, the heat sinks 20 are provided on the side opposite to the cooling fans.

The heat sink 1 on the cooling fan side is also provided.
7 and 19 are adapted to be locked to the upper and lower lamp houses 2 and 3 which are the insulating members, and the heat sinks 18 and 20 on the side opposite to the cooling fan are the heat sinks 17 and 19 on the side adjacent to the cooling fan. The heat sink 17 and the heat sink 18 are fixed by screws.
Further, the heat sink 19 and the heat sink 20 are electrically connected to each other.

That is, as shown in FIG. 3, recesses 21, 21, ... Are provided on the upper and lower surfaces of the heat sinks 17, 19 on the cooling fan side, and the inner walls of the upper and lower lamp houses 2, 3 are provided. The recesses 21,
, Are provided at positions corresponding to 21, 21, ..., And the convex portions 22, 2, are provided in the concave portions 21, 21 ,.
2, ... are fitted together. The concave portions 21 and 21 provided in the heat sink 19 and the convex portions 22 and 22 fitted into the concave portions 21 and 21 have an oval shape so that the heat sink 19 is prevented from rotating. There is.

The heat sinks 17 and 1 on the cooling fan side
Male threaded portions 23, 23 are provided on the end surface of the non-cooling fan side 9 of FIG. 9, respectively. Is screwed in, so that the heat sink 17 fixes the heat sink 18 and the heat sink 19 fixes the heat sink 20, respectively.

Further, the heat sinks 18 and 20 have
The light source lamp 16 emits illumination light to the infrared cut filter 1
It is provided at a position where light can be emitted through 0. The heat sink 18 is divided into an upper portion and a lower portion, which are connected to each other by a leaf spring (not shown), and a fastener 26 is provided on the other side. By stopping this, one end of the light source lamp 16 can be clamped.
It should be noted that when stopped by the stopper 26, the leaf spring (not shown) is urged, and when the stopper 26 is removed,
The upper and lower parts of the heat sink 18 are opened by the urging force of a leaf spring (not shown).
The other end of the light source lamp 16 is fixed to the heat sink 20.

Further, the light source lamp 16 has a plus electrode and a minus electrode on the outside, and each electrode portion is provided on the heat sink 18 as a minus electrode side while maintaining low electric resistance and high thermal conductivity. , Is fixed to the heat sink 20 as the plus electrode side. As a result, the heat sinks 17 and 18 are on the minus electrode side, and the heat sinks 19 and 20 are on the plus electrode side, which are arranged as different electrodes.

Further, the heat sinks 17, 18, 1
A plurality of cooling fins 40 are respectively provided from 9 to 20 toward the outside of the central portion of the light source lamp unit, and further, the heat sinks 17 and 18 are directed toward toward the central portion of the light source lamp unit.
On the surfaces where the heat sinks 19 and 20 face each other, cooling fins 41 are formed as heat radiating portions in the direction in which the heat sinks 17 and 18 and the heat sinks 19 and 20 are close to each other. Cooling fins 41 of the heat sinks 17 and 18
And the cooling fins 41 of the heat sinks 19 and 20 between the heat sinks 19 and 20, the inner insulating plate 42 as a plate-shaped insulating member extending downward from the upper lamp house 2.
And an inner insulating plate 43 as a plate-shaped insulating member extending upward from the lower lamp house 3 are interposed, and the heat sinks 17, 18 and the heat sinks 19, 20 are insulated from each other. It has secured enough.

The substrate housing case 4 is fixed to the bottom plate 3a of the lower lamp house 3. A board 27 on which a lighting circuit is mounted is arranged in the board housing case 4, the board 27 is connected to the heat sink 17 via a connection terminal 28, and the board 27 is connected to the heat sink 19. And a connection terminal (not shown).

The board 27 is held horizontally by ribs 29, 29, ... Provided on the inner wall of the board housing case 4. By mounting the board housing case 4 on the lower lamp house 3, , The protrusions 30, 30 provided on the bottom plate 3a of the lower lamp house 3,
, And the ribs 29, 29, ...

On the other hand, as shown in FIG. 5, the conductive shield case 45 for housing the light source lamp section 1 is provided with a cutout section 45a at a portion through which the illumination light from the light source lamp 16 passes. The heat ray reflection / absorption glass 46 is provided in the cutout portion 45a. In addition, for example, a grid-shaped metal film 46a is vapor-deposited on the surface of the heat ray reflection / absorption glass 46.

Further, as shown in FIG. 6, a fixing portion 47 of the heat ray reflecting and absorbing glass 46 is formed in the notch portion 45a of the shield case 45, and the heat ray reflecting and absorbing glass 46 of the fixed portion 47 is further formed. Conductive elastic member 4 on the side
8 are provided. The conductive elastic member 48 is in conductive contact with the metal film 46a formed on the surface of the heat ray reflection / absorption glass 46.

Next, the operation of the embodiment having the above construction will be described.

First, according to the substrate 27, the light source lamp 16
A negative potential is applied from the connection terminal 28 via the heat sinks 17 and 18, and at the same time, a positive potential is applied from the other connection terminal (not shown) via the heat sinks 19 and 20 to supply electric power. At the same time, the cooling fan 11 starts rotating.

The heat generated by the power supply to the light source lamp 16 is directly transferred from the electrodes on the surface of the light source lamp 16 to the heat sinks 18 and 20, and the heat sinks 18 and 20 further heat sinks 17 and 19.
Be transferred to.

Here, the light source lamp 16 is directly cooled by the cooling air from the cooling fan 11, and the heat transmitted to the heat sinks 17, 18, 19, 20 is transferred to the heat sinks 17, 18. , 19, 2
The cooling fins 40 and 41 formed in 0 are cooled by the cooling air from the cooling fan 11.

The heat of the illumination light of the light source lamp 16 is generated by the infrared cut filter 10 and the shield case 45.
It is effectively blocked by the heat ray absorbing and absorbing glass 46 provided on the outside, and the light with the heat suppressed as much as possible is emitted to the outside.

The respective cooling air from which the heat inside the light source lamp unit 1 is recovered is exhausted to the outside of the light source lamp unit 1 by the cooling fan 11.

On the other hand, the heat sinks 17 and 18 having the negative potential and the heat sink 1 having the positive potential.
Since an internal insulating plate 42 formed in the upper lamp house 2 and an internal insulating plate 43 formed in the lower lamp house 3 are interposed in the gap between the lamp housings 9 and 20, sufficient insulation is provided. Obtainable.

When the light source lamp 16 is turned on,
A large noise may be generated during lighting, which may affect other electronic components and electronic devices arranged inside the light source device. However, the shield case 45 prevents the noise from leaking to the outside. Effectively prevent. The shield case 45 is electrically connected to the ground of the light source device. Further, in the cutout portion 45a for the emitted light of the shield case 45, the metal film 46a on the heat ray reflection / absorption glass 46 is electrically connected to the shield case 45 through the conductive elastic member 48. And again
The metal film 46a also effectively prevents noise leakage.

{Second Embodiment} FIGS. 7 to 9 show a second embodiment of the present invention. FIG. 7 is an internal view of a light source lamp section, FIG. 8 is an explanatory view of mounting an internal insulating plate, and FIG. 9 is a light source lamp. FIG.

This second embodiment is also constructed in substantially the same manner as the first embodiment, but the shape and mounting method of the internal insulating plates provided in the upper and lower lamp houses are changed to change the structure of the light source lamp to The difference from the first embodiment is that the heat radiation effect is increased.

The description of the same components as those of the device of the first embodiment will be omitted.

In FIG. 7, reference numeral 51 is a light source lamp section, and this light source lamp section 51 has an upper lamp house 52 and a lower lamp house 53. A top plate 52a of the upper lamp house 52 and a lower part thereof. Lamp house 5
On the bottom plate 53a of No. 3, internal insulating plates 72, 72, which are T-shaped in cross section and are separately processed by resin or ceramic material, are provided.

That is, as shown in FIG. 8, a protrusion 72a is formed on the end surface of the inner insulating plate 72 on the mounting side, and the protrusion 72a and the top plate 52a of the upper lamp house 52 can be fitted together. Bottom plate 5 of lower lamp house 53
The slit 72b is formed in 3a.

Therefore, reliable insulation can be obtained between the cooling fins 80 formed on the heat sinks 68 and 70 which are electrodes different from each other.

Further, as shown in FIG. 9, the light source lamp 66
Is formed with a flange portion 66a also serving as a cooling fin on the outer periphery, and the light source lamp 66 can be fixed to the heat sink 70 with a screw 83 through a plurality of holes formed in the flange portion 66a. . As a result, the light source lamp 66 and the heat sink 70 are firmly and firmly fixed to each other, so that the heat conductivity can be improved.

The rest of the configuration and operation are the same as in the first embodiment, so a description thereof will be omitted.

In the present embodiment, the cross-sectional shape of the internal insulating plate is described as a T-shape, but the shape is not limited to the T-shape, but may be, for example, a Y-shape or a T-shape and a Y-shape. It may have a complicated shape such as a combination of.

[0049]

As described above, according to the present invention, a plurality of heat dissipating members for holding a light source lamp are provided with heat dissipating portions formed by extending facing surfaces of the heat dissipating members so as to be close to each other. Since the insulating member is provided in the above, electric insulation can be sufficiently ensured without enlarging the heat radiating member to the outside, and sufficient cooling can be performed even for the light source lamp that generates a large amount of heat.

[Brief description of drawings]

FIG. 1 is a view in the direction of arrow B in FIG. 2 according to the first embodiment of the present invention.

FIG. 2 is a plan view of a light source lamp unit according to the first embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2 according to the first embodiment of the present invention.

4 is a sectional view taken along line CC of FIG. 2 according to the first embodiment of the present invention.

FIG. 5 is an external perspective view of a light source device shield case according to the first embodiment of the present invention.

FIG. 6 is an explanatory view of attaching the heat ray reflecting and absorbing glass according to the first embodiment of the present invention.

FIG. 7 is an internal view of a light source lamp unit according to a second embodiment of the present invention.

FIG. 8 is an explanatory view of mounting an internal insulating plate according to a second embodiment of the present invention.

FIG. 9 is an explanatory view of mounting a light source lamp according to a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 16 light source lamp 17 heat dissipation member (heat sink) 18 heat dissipation member (heat sink) 19 heat dissipation member (heat sink) 20 heat dissipation member (heat sink) 41 heat dissipation part (cooling fin) 42 insulating member (inner insulating plate) 43 insulating member (inner insulating plate)

Claims (1)

(57) [Claims] 1. A heat radiating member for holding a light source lamp, the facing surfaces of the plurality of heat radiating members extending in directions close to each other to form a heat radiating portion, and an insulating member disposed in a gap between each of the heat radiating portions. Light source device.