JPH0513285B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a light source device for an endoscope, which has an improved structure of a socket for connecting an endoscope.

In order to drive the camera's film winding motor through the endoscope, or to operate the shutter or diaphragm on the light source side by the camera's release operation, an electrical connection is required between the endoscope and the light source device. It was necessary to provide a means of connection. Conventionally, multiple contact pins were provided in the socket for connecting the connector on the endoscope side, and each lead wire was individually soldered and wired to each contact pin, or each lead wire was wired one by one. It was crimped, electrically connected, and wired. Therefore, the wiring work is very troublesome, and since the work is done for each wire, it takes a lot of time. In addition, when replacing the socket, it is necessary to remove the solder each time or to remove the other end of the lead wire connected to the contact pin of the socket, which is troublesome.

Furthermore, in addition to the electrical connection, this socket is used to insert the light guide tube on the plug side of the endoscope, and as it is well known, the light source of the light source device becomes extremely hot, so the lead wire may become heated to this high temperature. If you connect it to a light guide tube or light source, the outer sheath of the lead wire will melt. If the outer sheath of this lead wire melts, there is a danger of it being shot, which could cause a malfunction. There is also a risk that the lead wire may enter the optical path from the light source to the light guide tube and block the optical path.

The present invention has been made focusing on the above circumstances,
The purpose of this is to make wiring in the socket part easier, to ensure that this wiring does not block the light entering the light guide tube from the light source, to eliminate the risk of failure due to lead wire shorts, and to make it easier to replace the socket. An object of the present invention is to provide a light source device for an endoscope that can easily perform the following operations.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Figure 1, 1 is an endoscope, and 2 is the endoscope 1.
This is an endoscope light source device that connects the The endoscope 1 includes an operating section 3, an insertion section 4, and a light guide cable 5, and a plug 6 is provided at the tip of the light guide cable 5. This plug 6
can be connected to the socket 7 of the endoscope light source device 2.

As shown in FIG. 2, the plug 6 has a plug body 9 made of an electrically insulating material fitted into an opening of an outer ring 8, and the plug body 9 is attached and fixed to the opening of the outer ring 8 by a nut 11. has been done. Also,
A light guide tube 13 into which a light guide fiber 12 is inserted and contact pins 14 as a plurality of electrical contacts are attached to the plug body 9. A lead wire 15 is connected to each contact pin 14, and each lead wire 15 is guided through the light guide cable 5 and the operating section 3 to the eyepiece section 16 of the operating section 3. are connected to the contacts 17, respectively. Further, the light guide tube 13 and the contact pin 14 protrude from the outer end surface of the plug body 9. A tightening ring 18 whose outer peripheral surface is knurled is rotatably attached to the outer periphery of the outer ring 8, and this tightening ring 18 is adapted to engage with the socket 7 as described later.

The socket 7 of the endoscope light source device 2 is constructed as shown in FIG. That is, the mounting ring 2 is attached to the outer periphery of the socket body 21 made of electrically insulating material.
The mounting ring 22 is fitted with the nut 2.
3 to the socket body 21.
The mounting ring 22 is inserted into a mounting hole 25 provided in a front panel 24 forming the housing of the endoscope light source device 2, and is removably fixed to the front panel 24 by a tightening nut 26. Further, a tightening ring 18 on the plug 6 side is provided on the outer periphery of the mounting ring 22.
A threaded portion 27 is formed into which the screw is screwed. The socket body 21 is provided with an insertion hole 28 through which the light guide tube 13 is passed, and a contact member 29 corresponding to the contact pin 14 and having one end brought into contact with the contact pin 14. Furthermore, a printed wiring board 30 as shown in FIG. 3 is mounted and fixed to the inner end surface of the mounting ring 22 with a set screw 32 via a spacer 31. As a result, the socket body 21, the contact member 29, and the printed wiring board 30 are integrated.
Configure socket 7. The other end of each contact member 29 is attached to a printed wiring board 30 by soldering or the like. Furthermore, the other end of each contact member 29 is connected to a printed wiring 33 of a printed wiring board 30, as shown in FIG. Further, a connector 34 is provided at one end of the printed wiring board 30.
is attached to the connector 34, and each of the printed wirings 33 described above is guided and connected to this connector 34.
A plug 36 of an electric cord 35 is detachably connected to this connector 34. The electric cord 35 is connected to a power supply circuit for driving a photographing device (not shown) installed in the endoscope light source device 2, an exposure control circuit, and the like.

Furthermore, an insertion hole 40 is formed in the center of the printed wiring board 30 to allow the light guide tube 13 to pass therethrough. At the tip of the light guide tube 13 passing through the insertion hole 40, a light source lamp 37 is installed to face it, as shown in FIG. Further, a shutter blade 39 is installed in front of the light source lamp 37 and is driven to open and close by a solenoid 38.

Therefore, when attaching the plug 6 of the light guide cable 5 to the socket 7 of the endoscope light source device 2, the light guide tube 13 is inserted into the socket main body 2.
1 into the insertion hole 28, and then insert the contact pin 14 into the insertion hole 28 of
into the corresponding contact member 29. Furthermore, by screwing the tightening ring 18 of the plug 6 onto the outer periphery of the mounting ring 22 on the socket 7 side, the connection can be made as shown in FIG.

On the other hand, when assembling the socket 7, since the contact member 29 is connected to the printed wiring board 30 in advance, there is no need to solder the lead wires of the electric cord 35 to the contact member 29 one by one. Moreover, electrical connection can be easily made by automatic soldering or the like. Furthermore, when the socket 7 is to be replaced, it can be easily replaced by attaching and detaching the connector 34.

Note that the printed wiring board 30 in the above embodiment
It may also be used as a flexible printed wiring board.

As explained above, the present invention electrically connects the lead wire to the contact member of the socket via the printed wiring board, so that the lead wire can be easily wired and connected at the socket part, and
It is also possible to use automatic soldering equipment,
It is possible to significantly shorten the time required for assembly and reduce costs. Furthermore, the present invention makes the socket detachable from the light source device, and
Since a connector is used to connect the lead wire to the printed wiring board, the socket can be easily attached and detached. Therefore, assembly work such as the above-mentioned connection work and repair/replacement can be easily performed.

In addition, in the present invention, the socket for electrical and optical connections is designed so that the electrical and optical connections do not adversely affect each other, that is, the lead wires are placed within the optical path from the light source to the light guide tube. It is possible to provide a light source device for an endoscope that prevents the lead wire from entering the light source or from melting the outer skin due to contact with the high temperature portion of the light source or light guide tube.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a perspective view of an endoscope and a light source device, Fig. 2 is a sectional view of a plug connected to a socket, and Fig. 3 is a printed wiring board in the socket part. FIG. 1... Endoscope, 2... Endoscope light source device, 6...
...Plug, 7...Socket, 14...Contact pin (electrical contact), 21...Socket body, 29...Contact member, 30...Printed wiring board, 33...Printed wiring, 34...Connector, 35... …Electrical cord,
40...Insertion hole.

Claims (1)

[Scope of Claims] 1. A light source device for an endoscope having a socket for optically and electrically connecting a light guide tube into which a light guide fiber is inserted and an endoscope plug having an electrical contact, a socket body, a printed wiring board provided on the rear surface of the socket body perpendicular to the direction of insertion and removal of the plug, one end built into the socket body and in contact with the electrical contact, and one end fixed to the printed wiring board. a contact member having the other end thereof, and a connector connected to the lead wire, printed wiring electrically connecting the other end of the contact member to the connector, and a light guide of the plug. A light source device for an endoscope, comprising an insertion hole into which a tube is inserted, and the socket is detachably attached to a light source device housing.