JPS5940457B2 - gastrocamera device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gastrocamera device equipped with a photographing device at its distal end for insertion into a body cavity.

Generally, for this type of gastrocamera device, the lighting method is 1.
) A method in which a lamp is provided at the tip and a current is supplied to the lamp from the outside via a lead wire for illumination; 11) A method in which a lamp is provided near the other end of a light guide with one end placed at the tip and external There is a method of illuminating from the body, but the latter has the advantage of being safer as it requires less energy supplied into the body cavity than the former, and the structure of the tip can be made simpler and smaller, so it has been recently developed. It is attracting attention.

By the way, the latter mentioned above can be roughly divided into the following three types.

1) One lamp is used both during observation and photography, and the light output of the lamp is always kept constant.

ii) One lamp is used for both observation and photography, and the light output of the lamp is increased during photography.

jii) The lamp is switched between observation and photography, and a lamp with a large luminous flux and short-time emission is used during photography.

Here, ll1) does not require a very large light source device and can take high-speed photographs, so it has been considered as an extremely effective means for the present device, where the subject is easily mobile within the body cavity. Attention has been paid.

By the way, among the methods using the method 111), those in which lamp switching is performed using a reflective member effectively utilize the limited space near the incident end face of the light guide, and the switching is relatively easy. It has an excellent advantage in that it can be
As shown in the figure, observation lamp 1 and photography lamp 2
are arranged side by side, and a reflecting mirror 3 whose angle can be changed is provided in the middle of the optical path of each of the lamps 1 and 2.
The light from the observation lamp 1 and the photography lamp 2 is made to selectively enter the incident end face of the light guide 4 by changing the angle of the reflecting mirror 3, and the light from the observation lamp 1 and the photography lamp 2 is placed in the middle of the optical path. A reflective mirror 5 is provided that can be inserted and removed to selectively enter the incident end face of the light guide 4, and the light from the observation lamp 1 and the photography lamp 2 can be inserted and removed in the middle of the optical path. A conceivable example is C, in which a prism 6 is provided so that the light is selectively incident on the incident end face of the light guide 4.

By the way, in a normal imaging device, it is relatively easy to operate the drive mechanism that drives the reflection member described above by operating a tuning contact such as an M contact or an X contact, but in a gastrocamera device, In cases where the photographing device is attached near the output end of the light guide, the operating section of the device is provided externally, so there are mechanical limitations due to the distance between the photographing section and the operating section. It does not have a time setting mechanism or a highly accurate tuning contact like the normal photographic equipment mentioned above, but has very variable tuning contacts in which the entire process of opening/closing the shutter and opening/closing the tuning contact is performed only manually. Therefore, in the gastrocamera device, there is a problem in that it is extremely difficult to drive the above-mentioned reflecting member in synchronization with the operation of the photographing device.

This invention was devised in order to solve such problems, and it is possible to accurately switch the lamp between observation and photography by using a reflective member that responds to the photography operation while coordinating the timing with the operation of the photography device. The present invention provides a gastrocamera device that can be used.

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

First, to describe the configuration, as shown in FIG.
The body cavity wall 14 is irradiated with light from a photography lamp 15, such as a strobe light, which is turned on for a short period of time, through the light guide 13.

The reflecting mirror 12 is detachably installed in the optical path of the photographing lamp 15 with respect to the light guide 13, and when the reflecting mirror 12 is inserted into the optical path, it reflects the light from the photographing lamp 15. At the same time, the light from the observation lamp 11 is reflected by its reflecting surface and guided to the incident end surface of the light guide 13.

A photographing section 17 of a photographing device 16 is attached near the output end of the light guide 13.

This photographing unit 17 irradiates the reflected light of the light irradiated onto the body cavity wall 13 via the light guide 13 via a transparent window 18 and a lens 19 onto a reflecting mirror 21 having a pinhole 20 in the center thereof. That's what I do.

Then, the light reflected by the reflecting mirror 21 is transmitted to an eyepiece section provided outside via an image guide 22.

Further, the light passing through the pinhole 20 of the reflecting mirror 21 is exposed to the film 24 via the shutter 23.

The film 24 is pulled out frame by frame from the film cartridge 25 by remote control.

The photographing device 16 has its photographing section 17 operated by an operating section 26 provided externally.

The operating portion 26 has a disk 27 provided with relatively long protrusions 27a and 27b substantially opposite to each other on its peripheral edge, and a photographing lever 28 which is operated to release the shutter during photographing is attached to the disk 27.

The disk 27 is rotated in the direction shown in the figure by the photographing lever 28.

A counter spring 29 is attached to the photographing lever 28 so that the lever 28 and the disk 27 return to their original states when the lever 28 is released.

The disk 27 and the shutter 23 are connected by a string 30, and when the disk 27 is rotated by operating the photographing lever 28, the string 30 is pulled, thereby opening the shutter 23. ing.

First and second microswitches 31 and 32 are provided opposite the projections 27a and 27b of the disc 27, respectively.

Each of the microswitches 31 and 32 operates as a so-called tuning contact, and the first microswitch 31 is biased by the protrusion 27a of the disk 27 to open its contact when the photographic lever 28 is not operated. As soon as the photographing lever 28 is operated, the disc 27 is
The second microswitch 32 is biased by the projection 27b of the disc 27 when the photographing lever 28 is not operated, and its contact is closed. The contact point is open, and when the photographing lever 28 is operated, the disc 27 moves into the projection 2.
The contact is kept open until the protrusion 7b is rotated by the length of the protrusion 7b, and then the contact is closed when the disc 27 is rotated by the length of the protrusion 27b or more.

The length of the protrusion 27b of the disc 27 is set in advance so that the opening operation of the shutter 23 ends before the second microswitch 32 closes.

Then, a control circuit 33 that responds to the closing of each of the microswitches 31 and 32 energizes a lamp lighting circuit 34 that lights up the photography lamp 15, and a reflection member drive mechanism such as an electromagnetic solenoid that drives the reflection mirror 12. 35 is energized.

This circuit configuration is shown in FIGS. 3 and 4.

That is, the electromagnetic solenoid 35 is connected to the first battery 36 via the first microswitch 31 in series.

Further, the lamp lighting circuit 34 is connected to the second battery 37.
The lighting circuit 34 is connected to the photographing lamp 15 in parallel.

The lamp lighting circuit 34 is connected to the second battery 37 through a resistor 38 in series with a capacitor circuit 43 consisting of first, second, and third charge/discharge capacitors 39, 40, 41, and a capacity changeover switch 42. are doing.

This capacitor circuit 43 changes the number of the capacitors 39, 40, 41 used by the capacitor switch 42, thereby changing the capacitance.

A series circuit of a resistor 44 and a fourth charging/discharging capacitor 45 is connected in parallel to the capacitor circuit 43, and the fourth charging/discharging capacitor 45 is connected to the primary winding of the high voltage pulse generation transformer 46 and the second A series circuit with the microswitch 32 is connected in parallel.

A secondary winding of the transformer 46 is connected between one end of the photographing lamp 15 and a trigger electrode 47 of the lamp 15.

The electromagnetic solenoid 35 inserts the reflecting mirror 12 into the optical path of the photography lamp 15 toward the light guide 13 when it is deenergized, and removes the reflecting mirror 12 from the optical path when it is energized. It is something that makes you

Next, the operation of an embodiment having such a configuration will be described.

In the observation state, the first and second microswitches 31°32
Since the electromagnetic solenoid 35 is in the open state, the electromagnetic solenoid 35 is not energized and the reflecting mirror 12 is inserted into the optical path of the photographing lamp 15, and the lamp lighting circuit 34 is connected to the first , charges the second charge/discharge capacitor 39,40, and charges the fourth charge/discharge capacitor 45 via the resistors 38 and 44.

The light from the observation lamp 11 is reflected by the reflecting mirror 12 and enters the light guide 13, and is irradiated onto the body cavity wall 14 via the light guide 13.

The reflected light from the body cavity wall 14 passes through the transparent window 18 and the lens 1.
9, is reflected by a reflecting mirror 21, enters an image guide 22, and is sent to the eyepiece via the image guide 22.

Thus, the operator can observe the inside of the body cavity through the eyepiece and the image guide 22.

On the other hand, the light incident through the pinhole 20 of the reflecting mirror 21 is blocked by the shutter 23.

Therefore, film 24 is never exposed.

During this observation, if the operator wishes to take a photograph of the inside of the body cavity, he operates the photographing lever 28.

Then, the disk 27 rotates in the direction shown, and first the first microswitch 31 deenergizes and closes its contact as shown in FIG. 5a, so that the electromagnetic solenoid 35
is energized as shown in FIG. 5B, and the reflecting mirror 12 leaves the optical path of the photographing lamp 15 with a mechanical delay of several milliseconds, as shown in FIG. 5C.

When the reflecting mirror 12 is removed, the shutter 23 is subsequently opened as shown in d of FIG.

This opening of the shutter 23 is performed by pulling the string 30 by rotating the disk 27, and therefore takes a relatively long time.

Then, when the shutter 23 finishes opening, the second microswitch 32 disengages the protrusion 27b of the disc 27 and is deenergized, closing its contact as shown in FIG. A discharge current flows from the fourth charging/discharging capacitor 45 to the primary winding of the pulse generation transformer 46, and a high voltage pulse is generated in the secondary winding of the transformer 46, and the high voltage pulse is photographed via the trigger electrode 47. lamp 1
5.

The photographing lamp 15 is then turned on for a short period of time as shown at f in FIG.

In this way, the film 24 is exposed to the reflected light obtained by irradiating the body cavity wall 14 with strong light generated from the photographing lamp 15, as shown in g in FIG. 5, and a photograph is taken.

When the photographing is completed, the photographing lever 28 is released.

However, first, the second microswitch 32 is
The shutter 23 returns as shown in FIG.
and finally close the first microswitch 3 as shown in
1 is restored, and the reflecting mirror 12 is inserted into the optical path of the photographing lamp 15 with a delay of several milliseconds, as shown in FIG. 5C.

In this way, one photographing operation is completed, and the observation state is resumed.

In this case, in order to change the amount of light emitted from the photographing lamp 15, the number of charge/discharge capacitors 39, 40, 41 used can be changed by using the capacitance changeover switch 42, as in the previous embodiment.

Further, in the above embodiment, the observation lamp 11 and the photography lamp 1
1 has been described, in which the switching between the 5 and 5 is performed by inserting and removing the reflecting mirror 12 into the optical path of the photographing lamp 15, but the invention is not limited to this; Items 2 and 3 are also applicable.

As detailed above, according to the present invention, the optical path of each lamp, including the observation lamp that is lit continuously and the photography lamp that is lit for a short time, is selectively guided to the incident end surface of the light guide by the reflective member, It has first and second tuning contacts that are sequentially energized in response to the shutter release operation, and the The reflecting member is switched to the photographing lamp side, the photographing lamp is turned on in response to the start of operation of the second tuning contact, and the reflecting member is switched to the observation lamp side in response to the end of operation of the first tuning contact. The first tuning contact of the photographing device is set to start operating before the shutter opening operation starts, and the second tuning contact starts operating after the shutter opening operation is completed. Since the operation of the first tuning contact is set to end after the closing operation of the shutter is completed, the lamp switching between observation and photography is performed by the reflective member that responds to the photography operation. It is possible to provide a gastrocamera device that can accurately perform operations while keeping timing with the operation of the imaging device.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a method of using a reflective member to switch lamps during observation and photographing, and Figs. 2 to 5 show an embodiment of the present invention, and Fig. 2 is a schematic diagram. figure,
3 and 4 are circuit diagrams, and FIG. 5 is a timing chart showing the operation of each part. 11...Observation lamp, 12...Reflection mirror, 13...Light guide, 14...
...Body cavity wall, 15... Photography lamp, 16...
...Photography equipment, 17...Photography department, 23...
...Shutter, 24...Film, 26.
...Operation unit, 27...Disc, 27a,
27b...Protrusion, 31.32...Micro switch.

Claims (1)

[Claims] 1. A light source that includes an observation lamp that lights up continuously, a photography lamp that lights up for a short time, and a reflective member that operates to selectively guide the optical path of each of the lamps to the incident end surface of the light guide. The incident end of a light guide for illumination is disposed at the output end of the body cavity, and the imaging section of the imaging device is attached near the exit end of the light guide at the distal end to be inserted into the body cavity. A release means for opening and closing the shutter is disposed in the hand-operated unit, and has first and second tuning contacts that are sequentially energized in response to the operation of the release means, and the first tuning contact starts operating. In response to this, the reflecting member is switched to the photographing lamp side, and in response to the start of operation of the second tuning contact, the photographing lamp is turned on, and when the operation of the first tuning contact is finished, a control circuit that responsively switches the reflecting member to the observation lamp side, the first tuning contact of the photographing device is set to start operating before the opening operation of the shutter starts; The second tuning contact is set to start operating after the shutter opening operation is completed, and the first tuning contact is set to end the operation after the shutter closing operation is completed. camera equipment.