JPS60262369A - Lamp supporting device of light source - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a light source device that provides illumination light to the distal end of a body-inserted portion of an endoscope, for example, and particularly to a support device for a light source lamp thereof.

"Prior Art and its Problems" As is well known, in an endoscope, light from a light source device for illumination is applied to an illumination window at the tip of the body inserted into the body through a light kite made of an optical fiber bundle, and the endoscope is illuminated by this illumination light. The examined part is observed through an image fiber and an eyepiece for image transmission. The light source lamp of the light source device used for this purpose is required to have high brightness, and for this reason, xenon wrap has conventionally been used. FIG. 4 shows an example of this xenon lamp 11, in which a discharge type m13.1 is placed inside a tube 12 made of elongated quartz glass.
4 facing each other, and J1 xenon cassette,
Electrodes 15.16 are provided at both external ends of the tube 12 and are electrically connected to the radiation electrodes 13.14. This type of xenon lamp 11.

Since the tube 12 is extremely averse to dirt, even fingerprints are not allowed, making handling extremely troublesome.

In addition, since the xenon lamp 11 is long and thin and easily deformed, it requires a special mounting structure that takes into account distortion caused by the mounting bracket, thermal expansion of the lamp itself, etc. However, there is a problem in that sufficient mounting strength cannot be obtained.

Therefore, in recent years, a cylindrical xenon lamp 20 as shown in FIG. is used. This xenon lamp 20
has an exit window 21 made of quartz glass on one end surface, a negative electrode 22 provided on its outer periphery, and a positive electrode 23 provided on the outer periphery and end surface of the other end. This xenon lamp 20 has no problem of dirt even when touched by hand except for the emission window 21, and since it is cylindrical, it is also excellent in strength.

FIG. 6 shows a conventional example of a support device for this xenon lamp 20. In order to improve the heat dissipation of the xenon lamp 20, this support device has a xenon lamp 20 placed between a pair of heat sinks 24 and 25 having a large number of heat dissipation fins 24a and 25a.
The heat sinks 24 and 25
have a through mounting hole 26 into which the negative electrode 22 and positive electrode 23 of the xenon lamp 20 are inserted, and a mounting step 2, respectively.
7 is formed. The xenon lamp 20 is fixed to the heat sink 25 by fitting its rear end into the mounting step 27 so that the positive electrode 23 is tightly attached to the heat sink 25, and then tightening the screws 28 in this state. Further, an annular conductive contact member 29 made of an elastic material is inserted between the negative electrode 22 and the mounting hole 26 for the purpose of ensuring electrical contact between the heat sink 24 and the negative electrode 22. The heat sink 24.25 is fixed by screwing the fixing long screw 30.3゜l inserted therein into the electrode nut 33.34 of the fixed substrate 32 made of an insulating material fixed inside the light source device. It is fixed to the substrate 32. Electrode nut 33.34
On the other side of the heat sink 24,25, there is an electrode terminal 3.
5.36 is connected. With the support structure described in 1- above, the cannon lamp 20 is mechanically held between the heat sinks 24 and 25, and its negative electrode 22 and positive electrode 23 are connected to the electrodes via the heat sinks 24 and 25 and the electrode nuts 33 and 34. It is electrically connected to terminals 35 and 36.

In this conventional support structure, the negative electrode 22 of the xenon wrap 20 and the heat sink 24 are simply in contact with each other via the annular conductive contact member 29.
Poor contact occurs due to variations in the diameter of the lamp, resulting in problems such as the lamp not lighting up or the illumination light becoming unstable. Also, when replacing the xenon lamp 20, since there is not enough space inside the light source device, first remove the long fixing screws 30, 31, separate the heat sink 24, 25 from the fixing board 32, and then remove the fixing screw 28. xenon lamp 20 must be separated from heat sinks 24 and 25. For this reason, there was a problem in that the fixed substrate 32 and the heat sinks 24 and 25 were all separated, and reassembling them required a lot of effort and time.

``Object of the Invention'' The present invention solves the problems of the conventional lamp support device as described below, and makes it easy to replace the light source lamp.
7. It is an object of the present invention to obtain a lamp support device that also ensures electrical contact between the negative electrode and the heat sink.

"95. Outline of Light" The lamp support device of the present invention comprises a lamp support unit by fixing a support substrate and a pair of heat sinks in advance, and the lamp support unit is removably attached to a fixed substrate of a light source device. The heat sink is characterized in that one of the pair of heat sinks is provided with a mounting hole through which the original thickness lamp is inserted, a slit communicating with the mounting hole, and a tightening means for tightening the pair of legs separated by the slit. There is. To add more light source lamps, first remove the entire lamp support unit from the fixed board. Then, one electrode of the light source lamp inserted through the mounting hole is mounted and fixed in contact with the heat sink on the non-flowering side, and the other electrode is tightened and fixed in the mounting hole by the fastening means. To remove the light source lamp, perform the following procedure in reverse order. Since the light source lamp contacts the mounting hole with sufficient contact pressure by the tightening means, mechanical support strength and electrical contact pressure can be obtained at the same time.
1:)□ 6゜ "Embodiments of the Invention" The present invention will be explained below with reference to illustrated embodiments.
) and (b) show the first embodiment of the present invention. Heat sink 40.4 made of a pair of left and right conductive materials
1 is fixed to a support substrate 45 made of an insulating material via a fixing screw 42 and threaded portions 43a, 44a of electrical connectors 43, 44. 40a and 41a are radiation fins of the heat sink 40.4.1. This fixing structure determines the positional relationship of the heat sinks 40, 41, the support substrate 45, and the electrical connectors 43 and 44, which constitute a lamp support unit (LU).

A mounting hole 46 into which the xenon lamp 20 is inserted and a slit 47 communicating with the mounting hole 46 are formed in the heat sink 40 on the side corresponding to the negative electrode 22 (output window 21) of the xenon lamp 20. A tightening screw 49 is inserted into a pair of legs 48a and 48b formed on the left and right sides of the slit 47, and a tightening screw 49 is inserted into one of the legs 48a, and the tip thereof is screwed into the other leg 48b. Therefore, the tightening screw 4
When tightening 9, the distance between the legs 48a, 48b narrows and the diameter of the mounting hole 46 decreases;
8b can be opened due to its elasticity, and the diameter of the mounting hole 46 can be expanded.

The electrical connectors 43, 44 have a plug on one side and a socket 71 on the other, and an electrical connector 51, 52 consisting of a socket and a plug corresponding to the electrical connector 43, 44 is attached to the fixed board 50 in the light source device. Fixed. Electrode terminals 35, 36 are fixed to the electrical connectors 51, 52 via nuts 53 on the back surface of the fixed board 50.

In the present device having the configuration 1-, the xenon lamp 20 can be inserted from the axial direction of the mounting hole 46 by loosening the tightening screw 49 with the lamp support unit LU removed from the fixed substrate 50. In this case, due to size variations, the xenon lamp 20 (negative electrode 22, i1
If the E electrode 23) cannot be inserted into the mounting hole 46,
The diameter of the mounting hole 46 can be expanded by opening the pair of legs 48a, 48b. Then, by bringing the bottom of the positive electrode 23 of the xenon lamp 20 into contact with the heat sink 41 and tightening the fixing screw 28, the positive electrode 23 is electrically connected to the heat sink 41.
It is fixed to this while in contact with 1. Then, when the tightening screw 49 is tightened, the diameter of the mounting hole 46 is reduced and the negative electrode 22
and the mounting hole 46, that is, the heat sink 40 are in close contact with each other.

Therefore, the xenon lamp 20 is connected to the heat sink 40.
41, and at the same time the correct city pole 23
is connected to the heat sink 41, and the negative electrode 22 is connected to the heat sink 40.
each with sufficient electrical contact pressure.

Connect the xenon lamp 20 to the heat sink 4 as shown below.
After fixing the lamp support unit LU
By fitting the electrical connectors 43 and 44 into the electrical connectors 51 and 52 of the fixed board 50, the installation of the xenon lamp 20 to the light source device is completed.

When removing the xenon lamp 20, the above operation may be performed in reverse. That is, the electrical connector 43 of the lamp support unit LU. ．． 44, the electrical connector 5 of the fixed board 50
1.52, and separate the lamp support unit y) L U from the fixed base plate 50. Next, loosen the fixing screw 28 and the tightening screw 49 and pull out the xenon lamp 20 in the axial direction of the mounting hole 46. . At this time, the heat sink 40.4
There is no need to separate 1 from the support substrate 45.

Electrical connectors 43, 44 (electrical connectors 51, 52) have one end as a plug and the other end as a socket, so
There is no way to get the xenon lamp 20 in the opposite direction.

In order to prevent the wrong direction of dissipation, other measures can be taken, such as making the electrical connectors 43, 44 load-bearing in asymmetric positions, or making the electrical connectors 43, 44 different in size.

FIGS. 2(a) and 2(b) show another embodiment of the present invention, in which Jl.
The support substrate 45 is fixed via fixing screws 55 to constitute a pump support unit (LU). The position of the support substrate 45 is preferably different from that of the slit 47 so as not to hinder the expansion and contraction of the legs 48a and 48b. Electrical connectors 43.44 are screwed directly onto the heat sink 40.41. This fixing structure determines the positional relationship between the heat sink 40, 41 and the electrical connector 43, 44 of the lamp support unit (LU), and -C (if fixed, the relative position will not be disturbed. Other configurations include: This is the same as the first embodiment, and the same parts are given the same reference numerals. According to this embodiment, the dimension in the height direction can be reduced by at least the thickness of the support substrate 45. Therefore, it is particularly suitable for use when there is no room for the height direction ζ'' within the light source device.The support substrate 45 may be provided only on one side of the heat sink 40, 41.

FIGS. 3(a) and 3(b) show yet another embodiment of the present invention. This embodiment uses another support substrate 57 made of an insulating material in order to fix the lamp support unit LU of the first embodiment to the lamp house (fixed substrate) 56 of the light source device. is fixed to the heat sink 40.41 by fixing screws 58.59 on the opposite side of the support substrate 45. This support board 57 is fixed to the heat sink 40 with fixing screws 58 only at the leg part 48b on the side where the tightening screw 49 is screwed, and the other leg part 48a is fixed to the support board 57. I feel free. For this reason, the leg portion 4 due to the tightening screw 49
There is no problem in expanding and contracting 8a and 48b. This support board 57 is fixed to the Langhaus 56 with fixing screws 60, and U,! , in the normal state, electrical connectors 43.44 fit into electrical connectors 51.52. Therefore, according to this embodiment, the support substrate 57 is connected to the lamp house 5.
By attaching and detaching the lamp support unit LU to the lamp housing 56, the lamp support unit LU can be reliably attached to and detached from the lamp house 56, and at the same time, the negative electrode 22 and the positive electrode 23 of the xenon lamp 2o are electrically connected to the electrical terminals 35 and 36. Can be attached and detached. Reference numeral 61 designates an exit window formed in the lampshaft 56, through which light from the exit window 21 of the xenon lamp 20 exits to the outside and is collected by the light guide via a condenser lens.

"Effects of the Invention" As described above, in the lamp support device for a light source device of the present invention, the support substrate and the heat sink constitute a lamp support unit (LU) that is detachable from the fixed substrate of the light source device.
The light source lamp can be replaced with the lamp support unit removed from the light source device. During replacement work, the mounting hole provided in one heat sink can be expanded and contracted using a slit and tightening means.
The light source lamp can be inserted and removed through this mounting hole. Therefore, when replacing the light source lamp, there is no need to separate the heat sink from the support substrate as in conventional devices. Therefore, the replacement work is easy and does not require any special technique or skill. In addition, by tightening the pair of legs separated by a slit using a tightening means, contact pressure between the mounting hole and the electrode of the light source lamp is obtained, so electrical contact is reliable and mechanical The support strength is also strong. Furthermore, if a plurality of lamp support units are prepared, the light source lamp can be replaced even more quickly by replacing the entire lamp support unit.

[Brief explanation of drawings]

FIGS. 1(a) and (b) are a front view and a sectional view showing an embodiment of the lamp support device of the present invention, and FIGS. 2(a) and (b) are
3(a) and 3(b) are a top view and a side view showing another embodiment of the lamp support device of the present invention, and FIGS. 3(a) and 3(b) are a front view and a cross section showing still another embodiment of the lamp support device of the present invention. Figure, 4th
The figure is 11: Top view of a conventional light source lamp, Fig. 5 (a),
(b) is a top view and a side view of a light source lamp to which the present invention is applied, and FIG. 6 is a small sectional view of a conventional lamp support device. 20... Light source wrap, 40.41... Heat sink, 43.44... Electrical connector, 45... Support base J
・ Plate, 46... Mounting hole, 47... Slit, 48
...Leg 8L49...Tightening screw (tightening means), 5Q.
・Fixed board, 51.52 ・Electrical connector, 56・
... Lamp house (fixed board), 57... Support board,
LU...Lamp support unit. Patent applicant: Asahi Optical Industry Co., Ltd. Agent: Kunio Miura Figure 2 (a) (b) Figure 3 (a) (b)

Claims (1)

[Claims] (1) Between a pair of heat sinks fixed to a support substrate,
In a lamp support device for a light source device that supports and fixes a light source lamp with electrodes at both ends of the light source lamp in contact with the heat sink, a lamp support unit is configured from the support substrate and a pair of heat sinks. The lamp support unit of the lever is removably attached to the fixed substrate of the light source device, and one of the pair of heat sinks has a mounting hole through which the light distribution source lamp is inserted, a slit communicating with the mounting hole, and a slit communicating with the mounting hole. A tightening means is provided to tighten the pair of legs separated by the slit, and one electrode of the light source lamp inserted through the mounting hole L is fixed in contact with the other heat sink, and the other electrode is fixed by this tightening means. A lamp support device for a light source device, characterized in that it is tightened and fixed in the mounting hole. (2. In claim 1, the lamp support unit has a pair of electrical connectors each connected to a pair of heat sinks, and this electrical connector is detachable from an electrical connector provided on a fixed board. Lamp support device for a light source device. (3) In claim 1 or 2, the support substrate of the lamp support unit is fixed to both sides of a pair of heat sinks, one of which is mechanically fixed to the fixed substrate. (4) Any one of claims 1 to 3.
In the lamp support device of the light source device, the fixed substrate is a lamp house.