JPH0148613B2 - - Google Patents

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 an illumination light source device is applied to an illumination window at the tip of the body insertion part through a light guide made of an optical fiber bundle, and the endoscope is illuminated by this illumination light. The examined part is observed through an image fiber for image transmission and an eyepiece. The light source lamp of a light source device used for such a purpose is required to have high brightness, and for this reason, a xenon lamp has conventionally been used. FIG. 4 shows an example of this xenon lamp 11, in which discharge electrodes 13 and 14 are disposed facing each other in a tube 12 made of elongated quartz glass, xenon gas is sealed, and discharge electrodes are placed at both external ends of the tube 12. Electrodes 15 and 16 are provided which are electrically connected to 13 and 14. This type of xenon lamp 11 was extremely difficult to handle, since it was extremely difficult to get the tube 12 dirty, and even fingerprints were not allowed to adhere to it. In addition, since this xenon lamp 11 is long and thin and easily deforms, distortion caused by the mounting bracket,
This requires a special mounting structure that takes into consideration the thermal expansion of the lamp itself, and furthermore, there is a problem in that even if such a special mounting structure is used, sufficient mounting strength cannot be obtained.

Therefore, in recent years, a cylindrical xenon lamp 20 as shown in FIG. 5 has been used. This xenon lamp 20 has an exit window 21 made of quartz glass on one end surface, and a negative electrode 22 on its outer periphery.
A positive electrode 23 is provided on the outer periphery and end face 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. This support device includes a large number of heat dissipation fins 2 to improve heat dissipation of the xenon lamp 20.
A pair of heat sinks 24 having 4a and 25a,
The xenon lamp 20 is supported between the heat sinks 24 and 25, and the negative electrode 22 and the positive electrode 2 of the xenon lamp 20 are connected to the heat sinks 24 and 25, respectively.
A mounting hole 26 that passes through the mounting hole 26 and a mounting step portion 27 are formed. The xenon lamp 20 is
Insert the rear end into this mounting step 27 and insert the positive electrode 2.
3, and is fixed to the heat sink 25 by tightening the fixing screw 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. heat sink 2
4, 25 are fixed length screws 30, 3 inserted therein.
1 is fixed to the fixed substrate 32 by screwing it into the electrode nuts 33 and 34 of the fixed substrate 32 made of an insulating material and fixed inside the light source device. The electrode nuts 33 and 34 are provided with heat sinks 24 and 2.
Electrode terminals 35 and 36 are connected to the opposite side of 5. With the above support structure, the xenon lamp 20
is mechanically held between heat sinks 24 and 25, and its negative electrode 22 and positive electrode 23 are electrically connected to electrode terminals 35 and 36 via heat sinks 24 and 25 and electrode nuts 33 and 34, respectively.

In this conventional support structure, since the negative electrode 22 of the xenon lamp 20 and the heat sink 24 are simply in contact with each other via the annular conductive contact member 29, variations in the diameter of the negative electrode 22, etc. Poor contact occurred, 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 and 31 to separate the heat sinks 24 and 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. Therefore, the fixed substrate 32, heat sinks 24 and 25
are all separated, and to reassemble them,
The problem was that it required a lot of effort and time.

``Object of the Invention'' The present invention solves the problems of the conventional lamp support device described above, and provides a lamp support that allows easy replacement of the light source lamp and ensures electrical contact between the positive and negative electrodes of the light source lamp and the heat sink. The purpose is to obtain equipment.

``Summary of the Invention'' 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 heat sinks is provided with a mounting hole through which the light source lamp is inserted, a slit communicating with the mounting hole, and a tightening means for tightening a pair of legs separated by the slit. To install the light source lamp, 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 fixed in contact with the heat sink on the side without the mounting hole, and the other electrode is fastened and fixed to the mounting hole by the fastening means. To remove the light source lamp, simply perform the operation 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.

"Embodiments of the Invention" The present invention will be described below with reference to illustrated embodiments. Figures 1a and 1b show a first embodiment of the invention. A pair of left and right heat sinks 40, 41 made of a conductive material are 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 sinks 40 and 41. This fixing structure determines the positional relationship between the heat sinks 40, 41, the support substrate 45, and the electrical connectors 43 and 44.
These constitute the lamp support unit LU.

The negative electrode 22 of the xenon lamp 20 (the exit window 2
The heat sink 40 on the side corresponding to 1) is formed with a mounting hole 46 into which the xenon lamp 20 is inserted, and a slit 47 inserted into the mounting hole 46. A tightening screw 49 is inserted into a pair of leg portions 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 leg portions 48a, and the tip thereof is screwed into the other leg portion 48b. Therefore, tightening screw 4
When 9 is tightened, the distance between the legs 48a, 48b is narrowed, and the diameter of the mounting hole 46 is reduced; when it is loosened, the legs 48a, 48b are opened by their elasticity, and the diameter of the mounting hole 46 is expanded. becomes possible.

The electrical connectors 43 and 44 have a plug on one side and a socket on the other, and a fixed board 50 in the light source device has an electrical connector 51 consisting of a socket and a plug corresponding to the electrical connectors 43 and 44.
52 is fixed. This electrical connector 51,
52 has a nut 5 on the back side of the fixed board 50.
Electrode terminals 35 and 36 are fixed via 3.

This device with the above configuration has a lamp support unit LU.
With the xenon lamp 20 removed from the fixed board 50, loosen the tightening screw 49.
can be inserted from the axial direction of the mounting hole 46. In this case, if the xenon lamp 20 (negative electrode 22, positive electrode 23) cannot be inserted into the mounting hole 46 due to size variations, the pair of legs 48
The diameter of the mounting hole 46 can be expanded by opening a and 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 fixed to the heat sink 41 while being electrically in contact with it. 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 brought into close contact with each other. Therefore, the xenon lamp 20 is mechanically firmly supported between the heat sinks 40 and 41, and at the same time, the positive electrode 23 is connected to the heat sink 41, and the negative electrode 22 is connected to the heat sink 4.
0 with sufficient electrical contact pressure.

Once the xenon lamp 20 is fixed between the heat sinks 40 and 41 as described above, the electric connectors 43 and 44 of the lamp support unit LU are fitted into the electric connectors 51 and 52 of the fixed board 50, and the xenon lamp 20 is fixed. Installation to the light source device is complete.

When removing the xenon lamp 20, the above operation may be performed in reverse. In other words, the electric connectors 43 and 44 of the lamp support unit LU are connected to the fixed board 5.
0 from the electrical connectors 51 and 52, and separate the lamp support unit LU from the fixed board 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. good. At this time, there is no need to separate the heat sinks 40 and 41 from the support substrate 45 at all.

Electrical connectors 43, 44 (electrical connector 51,
52) uses a plug on one side and a socket on the other, so there is no need to install the xenon lamp 20 in the opposite direction. In order to prevent the wrong mounting direction, other measures can be taken, such as arranging the electrical connectors 43 and 44 in asymmetrical positions and making the electrical connectors 43 and 44 different in size.

FIGS. 2a and 2b show another embodiment of the present invention, in which a support substrate 45 is fixed to both sides of heat sinks 40 and 41 via fixing screws 55 to form a lamp support unit LU. There is. Support substrate 45
It is preferable that the position is different from that of the slit 47 so as not to hinder the expansion and contraction of the legs 48a and 48b. The electrical connectors 43 and 44 are directly screwed and fixed to the heat sinks 40 and 41. This fixing structure allows the heat sinks 40, 41 and electrical connectors 43, 4 of the lamp support unit LU to
Once the positional relationship of 4 is determined and fixed, the relative position will not go out of order. The other configurations are the same as in 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, so it is particularly suitable for use when there is no margin in the dimension in the height direction within the light source device. .
Note that the support substrate 45 may be provided only on one side of the heat sinks 40 and 41.

Figures 3a and 3b show yet another embodiment of the invention. In this embodiment, another support substrate 57 made of an insulating material is used to fix the lamp support unit LU of the first embodiment to the lamp house (fixed substrate) 56 of the light source device. are attached to the heat sinks 40 and 4 by fixing screws 58 and 59 on the opposite side of the support substrate 45.
It is fixed at 1. 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. Therefore, the tightening screw 49
There is no problem in expanding and contracting the legs 48a and 48b. This support board 57 is fixed to the lamp house 56 with fixing screws 60, and in the fixed state, the electrical connectors 43 and 44 are fitted into the electrical connectors 51 and 52. Therefore, according to this embodiment, by attaching and detaching the support substrate 57 to and from the lamp house 56, the lamp support unit LU can be reliably attached and detached from the lamp house 56.
Moreover, the negative electrode 22 and positive electrode 23 of the xenon lamp 20 can be electrically connected to and removed from the electrode terminals 35 and 36 simultaneously with the attachment and detachment. In addition, 61 is the exit window bored in the lamp house 56, and the xenon lamp 20
The light from the exit window 21 exits from here and is applied to the light guide via the condenser lens.

"Effects of the Invention" As described above, in the lamp support device of the present invention, the support substrate and the heat sink constitute a lamp support unit LU that is removable from the fixed substrate of the light source device. The light source lamp can be replaced with the support unit removed from the light source device. During the replacement work, the mounting hole provided in one of the heat sinks can be expanded and contracted by the slit and its tightening means, so that 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, replacement work becomes easy and does not require any special technique or skill. In addition, contact pressure between the mounting hole and the electrode of the light source lamp is obtained by tightening the pair of legs separated by the slit with the tightening means, 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 more quickly by replacing the entire lamp support unit.

[Brief explanation of drawings]

1A and 1B are a front view and a sectional view showing an embodiment of the lamp support device of the present invention, FIGS. 2A and 2B are a front view and a side view showing another embodiment of the lamp support device of the present invention, Figures 3a and 3b are a front view and a sectional view showing still another embodiment of the lamp support device of the present invention, Figure 4 is a front view of a conventional light source lamp, and Figures 5a and b are objects of the present invention. Front view and side view of the light source lamp,
FIG. 6 is a sectional view showing a conventional lamp support device. 20... Light source lamp, 40, 41... Heat sink, 43, 44... Electrical connector, 45... Support board, 46... Mounting hole, 47... Slit, 4
8... Leg portion, 49... Tightening screw (tightening means), 5
0... Fixed board, 51, 52... Electrical connector,
56... Lamp house (fixed board), 57... Support board, LU... Lamp support unit.

Claims (1)

[Scope of Claims] 1. A light source device in which a light source lamp is supported and fixed between a pair of heat sinks fixed to a support substrate with electrodes at both ends of the light source lamp in contact with the heat sinks. In the lamp support device, the support substrate and the pair of heat sinks constitute a lamp support unit, the lamp support unit is removably attached to the fixed substrate of the light source device, and the light source lamp is attached to one of the pair of heat sinks. A mounting hole for insertion, a slit communicating with the mounting hole, and a tightening means for tightening the pair of legs separated by the slit are provided, and one electrode of the light source lamp inserted through the mounting hole is connected to the other heat sink. A lamp support device for a light source device, characterized in that the other electrode is fixed in contact with the mounting hole, and the other electrode is tightened and fixed in the mounting hole by the tightening means. 2. In claim 1, the lamp support unit has a pair of electrical connectors each connected to a pair of heat sinks, and the light source device is removable from an electrical connector provided on a fixed board. lamp support device. 3. The lamp support device of the light source device according to claim 1 or 2, wherein 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. The lamp support device of a light source device according to any one of claims 1 to 3, wherein the fixed substrate is a lamp house.