JPH0244254Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) The present invention relates to a light source device that supplies light to a light guide plug of an endoscope.

(Prior art) Conventional portable light source devices for endoscopes use a voltage lower than the general operating voltage of 100V, for example 12 to 25V.
It used a lamp that operated on For this reason, as shown in FIG. 2, a transformer 101 must be housed in a case 100, and the voltage must be lowered by the transformer 101 to operate the low voltage lamp 102. As a result, the device becomes large and heavy, making it difficult to carry and increasing costs.

Therefore, it is conceivable to use a high-voltage lamp that can be operated with the commonly used voltage and to eliminate the transformer 101 described above. However, in this case,
As the filament of the lamp becomes thinner and longer,
It is easy to break the wire due to shock or vibration, and when the wire breaks, an electric discharge occurs and the fuse blows, resulting in failure.

(Problems to be solved by the invention) The development of a light source device that can eliminate the need for a transformer by using a lamp that operates on commonly used voltage and can withstand shock and vibration has been awaited.

Structure of the Invention (Means for Solving the Problems) In order to solve the above problems, the present invention inserts and supports a plug support member into a hole formed in one side of the case, and provides support for this plug support member. The light guide plug of the endoscope is inserted into the insertion hole formed, and the lamp and condensing member are placed in the case with being supported by the lamp support member, and the lamp is condensed by the condensing member. In a light source device that supplies light to the end face of an inserted light guide plug, the plug support member is integrally provided so that the relative positional relationship with the lamp support member remains unchanged, and the lamp support member is provided integrally with the lamp support member. The present invention provides a light source device for an endoscope, characterized in that it is attached to the inside of a case via an elastic member.

(Example) An example of the present invention will be described below with reference to FIG. 10 in the figure is a case, and this case 1
A handle 11 is provided on the top surface of the device 0 for convenience of carrying. A cooling fan 12 is provided on the back side of the case 10, and a power cord 13 is led out. Case 1
An annular projection 14 projecting laterally is formed on the periphery of the lower surface of the 0, and an annular elastic member 15 made of rubber or the like is attached to this projection 14.

A hole 16 is formed in the front surface of the case 10, and a plug support member 20 is inserted into the hole 16. The plug support member 20 has a flange portion 2
1 and a protrusion 22 that protrudes inward from the flange 21, and has an insertion hole 23 along the central axis.

A light guide plug 30 of an endoscope is inserted into the insertion hole 23 of the plug support member 20. The light guide plug 30 is connected to an operating section (not shown) of an endoscope via a flexible cord 31, for example. An optical fiber for transmitting illumination light extends from the end surface 30a of the light guide plug 30 through the cord 31, the operation section, and the insertion section connected to the operation section to the distal end side of the insertion section. Light can be irradiated from the distal end of the insertion tube.

An auxiliary case 40 (lamp support member) is arranged inside the case 10. The auxiliary case 40 is integrally connected to the aforementioned plug support member 20 so that the relative positional relationship remains unchanged. That is, with the front part of the auxiliary case 40 in contact with the flange part 21 of the plug support member 20 and the hole 41 formed in the front part fitted into the protrusion part 22 of the plug support member 20, the bolt 4 described later is inserted.
2. Both are connected by a nut 43.

An elastic member 44 is interposed between the front surface of the auxiliary case 40 and the flange 21 of the plug support member 20, and the front surface of the case 10. The auxiliary case 40 is attached inside the case 10 in a floating state by tightening bolts 42 and nuts 43 that pass through the case 10, the elastic member 44, the flange portion 21, and the auxiliary case 40.

A lamp 4 is installed in the center of the back of the auxiliary case 40.
5 is supported. This lamp 45 is a high-voltage lamp that operates with a commonly used voltage of 100V. The lamp 45 is directly connected to the power cord 13 without intervening a transformer. The light from the lamp 45 is reflected by the concave mirror condensing member 46 and hits the end surface 30a of the light guide plug 30 inserted into the plug support member 20. At this time, the lamp 45 and the light guide plug 30 are arranged on the same optical axis.

A ventilation hole 47 is formed in the back of the auxiliary case 40, and the fan 12 is connected through the ventilation hole 47.
This prevents the inside of the auxiliary case 40 from overheating.

In the above configuration, the lamp 45 is configured to operate at a high voltage, has a thin and long filament, and is susceptible to shock and vibration. However, since the elastic member 15 is attached to the lower surface of the case 10 and the elastic member 44 is interposed between the case 10 and the auxiliary case 40, shocks and vibrations are absorbed by these elastic members 15 and 44. is,
It is possible to prevent the filament of the lamp 45 from breaking and the discharge that occurs when the filament breaks.

Here, if the lamp 45 is simply to be prevented from breaking, the auxiliary case 40 and the plug support member 2
Instead of fixing them integrally so that their relative positional relationship remains unchanged, they may be provided separately, and only the auxiliary case 40 may be attached to the case 10 via the elastic member 44. However, in this case, when shock or vibration is applied to the case 10, the auxiliary case 40 is displaced relative to the plug support member due to the deformation of the elastic member 44, and the auxiliary case 40 and the plug are Support member 20
The relative positional relationship with Then, the optical axis of the light reflected and condensed by the light guide plug 30 and the concave mirror 46 is shifted, and the lamp 45
There is a possibility that the light cannot be reliably applied to the end face of the light guide plug 30.

Therefore, in the light source device of the present invention, the plug support member 20 and the auxiliary case (lamp support member) 4 are
0 are integrally provided so that the relative positional relationship does not change, so that the light from the lamp 45 focused by the concave mirror 46 is always reliably applied to the end face of the light guide plug 30.

The present invention is not limited to the above embodiments and can be modified in various ways. For example, a lamp support member that is not shaped like a case may be used.

Further, the plug support member may be formed integrally with part or all of the lamp support member. moreover,
It is also possible to maintain a constant relative positional relationship by simply fitting the plug support member and the lamp support member together, and to connect only the lamp support member to the case via the elastic member.

Effects of the Invention As explained above, according to the present invention, since a lamp operated by the commonly used voltage is used, a transformer can be eliminated, and the device becomes smaller and lighter, making it easier to carry and reducing costs. will be promoted. Furthermore, since shocks and vibrations can be absorbed by the elastic member, breakage of the filament of the lamp can be prevented. Furthermore, since the relative positional relationship between the lamp support member and the plug support member does not change, the light from the lamp can always be reliably supplied to the light guide plug.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a light source device that is an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of a conventional light source device. DESCRIPTION OF SYMBOLS 10... Case, 16... Hole, 20... Plug support member, 23... Insertion hole, 30... Light guide plug, 30a... End face, 40... Auxiliary case (lamp support member), 44... Elasticity Part 45...
Lamp, 46... Concave mirror (light condensing member).

Claims (1)

[Scope of utility model registration request] A plug support member is inserted and supported into a hole formed in one side of the case, and a light guide plug of an endoscope is inserted into the insertion hole formed in the plug support member, and a lamp and a light condensing member are inserted into the case. In a light source device, the light guide plug is disposed in a state where it is supported by a lamp support member, and the lamp light focused by the light condensing member is applied to the end face of the inserted light guide plug. A light source device for an endoscope, characterized in that the lamp support member is provided integrally with the support member so that the relative positional relationship remains unchanged, and the lamp support member is attached to the inside of the case via an elastic member.