JPH1184594A - Film cassette for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film cassette capable of surely reading film identification information, without generating the problems of a failure in a contact, etc. SOLUTION: In an endoscope camera 21, a sticking tape 9 by fixing the case part of a film take-up part 4 in which a film 2 loaded in the film supplying part 3 of the cassette film 1 is wound/housed and a cover, is stuck to a position which is near a coil 25 through which the oscillation signal of an oscillator 22 passes, without requiring contact. In such a case, the conductor tape part of the fixing tape 9 transforms high frequency energy into heat energy, to dissipate it, by using the oscillation signal flowing through the coil 25, as an eddy current, in accordance with the kind of film, etc., so that the amplitude of the oscillation signal of the coil 25 is detected. Thus, the sensitivity, etc., of the film 2 corresponding to the conductor tape part can be identified without generating the problems of the failure in contact, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope film cassette mounted on an endoscope camera and used for photographing.

[0002]

2. Description of the Related Art In the future, there is a need for an endoscope film to have a high sensitivity so that a film emulsion can be made finer and an image can be photographed even in a dark illuminating device in accordance with an improvement in image quality of an endoscope image. As a conventional example, a film cassette is provided with an electric element such as a fixed resistor, as disclosed in Japanese Patent Application Laid-Open No.
By reading the difference in the values of the electric elements and the like, the type of the film is identified, and the camera attempts to read the number of films, the film sensitivity, the type of the film, the color temperature type, and the like.

[0003]

However, in this conventional example, it is necessary to prepare two or more electrical contacts, and there is a possibility that a contact failure may occur due to temperature, humidity, dust or dirt, thus causing a problem of erroneous setting. was there. In addition, the DX code method is generally used as a method for reading film information in a general camera, but this method becomes large, and in the case of an endoscope camera, the operability is that the camera is as small and lightweight as possible. Is required to maintain the image quality, and it is difficult to use the camera for endoscopic photography.

(Object of the Invention) The present invention has been made in view of the above points, and does not cause problems such as defective contacts.
An object of the present invention is to provide an endoscope film cassette that can reliably read film identification information.

[0005]

SUMMARY OF THE INVENTION A film stored in an endoscope film cassette comprising a film supply section, a film winding section, and a bridge section connecting the supply section and the winding section. Depending on the type of the endoscope film cassette, the film cassette for the endoscope is not mechanically connected to the oscillator on the endoscope camera side, and a film identification member having a different influence on the oscillation characteristics of the oscillator is provided. Thus, problems such as defective contacts do not occur, and information such as the type of film can be reliably identified.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIGS. 1 to 5 relate to a first embodiment of the present invention, and FIG. 1 shows a first embodiment of the present invention in a state of being mounted on an endoscope camera. 2 shows an endoscope film cassette in a perspective view, FIG. 2 shows a perspective view of the endoscope film cassette, and FIGS. 3A and 3B show the endoscope film cassette in a plan view and a rear view, respectively. FIG. 4 shows the structure of the fixing tape, and FIG. 5 shows the structure of the identification means provided on the endoscope camera side.

As shown in FIGS. 2 and 3, an endoscope film cassette (hereinafter simply referred to as a film cassette) 1 according to a first embodiment of the present invention is a film in which an unexposed film 2 is stored. It has a supply section 3, a film winding section 4 for storing a photographed film, and a bridge section 5 connecting the film supply section 3 and the film winding section 4.

The film winding section 4 is composed of a case section 6 and a lid 7, and the case section 6 is formed such that the upper side from a position closer to the upper end in the vertical direction (becomes a boundary section 8 described below) is stepwise thin. An opening is provided, and a cover 7 fitted to the thin portion is placed from above the opening, and the inside is shielded from light by the fitting portion so that exposure of the film 2 is prevented.

In this case, the lid 7 moves upward from the boundary portion 8 which is the lower end of the thin portion to prevent light from entering the case portion 6, that is, a fixing tape is provided so that the lid 7 does not come off. The case 9 and the lid 7 are attached to each other across the boundary 8 and fixed. Further, the cassette film 1 having been photographed is peeled off the fixing tape 9 so that
The cover 7 is moved and removed, and the photographed film 2 in the case portion 6 is taken out so that film development can be performed.

The leading end of the film 2 is locked by a winding engaging section 10 inside the film winding section 4. The wind-up claw of the endoscope camera 21 engages with the wind-up engaging portion 10 and rotates by one frame for each photographing to wind up the film 2.

The film supply unit 3 is also composed of a case 11 and a lid 12, but in this embodiment, the case 11 and the lid 12 are fixed with an adhesive.

The film supply section 3 and the film winding section 4 are formed of black plastic having a high light shielding function, and a bridge section 5 connecting them is also integrally formed of black plastic.

Although the configuration up to this point is the same as that of an existing film cassette, in the present embodiment, the oscillator 22 provided on the endoscope camera 21 side is mechanically operated according to film information such as the sensitivity of the film 2. It is characterized in that the fixed tape 9 made of a member that affects the oscillation characteristics of the oscillator 22 (in other words, changes the oscillation characteristics) is used in a state where the connection is not electrically connected. More specifically, the fixing tape 9 includes a conductor as shown in FIG. 4, more specifically, a tape-shaped or sheet-shaped conductor tape portion 1.
5 is used.

That is, the fixing tape 9 is composed of a conductor tape section 15 having identification information such as film sensitivity, and an adhesive section 16 provided on the back surface thereof for adhesively fixing.

By loading the film cassette 1 provided with the fixing tape 9 into the endoscope camera 21,
When the amplitude of the high-frequency oscillation signal is detected by the film information identification means provided in the endoscope camera 21, the film thickness or thickness of the conductive tape portion 15 corresponding to the detected amplitude value corresponds to the film thickness. It is possible to identify film information such as a film type corresponding to the above.

That is, as shown in FIG.
When the film cassette 1 is loaded in one of the film cassette storage chambers (simply storage chamber) 24, a coil 25 forming the oscillator 22 is disposed inside the wall of the storage chamber facing the film winding unit 4.

An eddy current flows through the conductive tape portion 15 disposed close to the coil 25 by electromagnetic coupling with a high-frequency oscillating signal flowing through the coil 25, and the eddy current causes the electric signal of the oscillating signal of the oscillator 22 to be reduced. Since the energy is lost as heat energy, the amplitude of the oscillation signal of the coil 25 changes according to the magnitude of the eddy current. By detecting the value of the amplitude, the film information given to the conductive tape portion 15 can be obtained. Make sure they can be identified.

For this reason, when the film sensitivity is high, for example, as shown in FIG. 4A, the conductor tape portion 15 does not significantly reduce the amplitude of the oscillation signal generated by the oscillator 22 (ie, generates a small eddy current). As described above, when the thickness (wall thickness) of the conductive tape portion 15 is formed to be thin, while the film sensitivity is low, the amplitude of the high-frequency oscillation signal generated by the oscillator 22 is further reduced (that is, a large eddy current is generated). It is formed thick.

FIG. 5 shows the configuration of this detection system. Oscillator 2
Reference numeral 2 denotes a Hartley-type or Colpitts-type oscillator configured by connecting a crystal oscillation element between a base emitter or a base collector of a transistor and using a tuning circuit including a coil 25 and a capacitor 26 between an emitter and a collector. .

It should be noted that not only the coil 25 but also a capacitor and a tuning circuit are used to increase the impedance near the oscillation frequency of the crystal oscillation element to increase the oscillation output. The output of the coil 25 is subjected to peak detection (or may be average detection) by a detection circuit 27 including a diode and a capacitor.

The output of the detection circuit 27 is input to a film identification circuit 28. The film identification circuit 28 includes, for example, a reference voltage generation circuit 28a that generates a plurality of different reference voltages, and compares the output with the plurality of reference voltages from the reference voltage generation circuit 28a to determine the output of the detection circuit 27. Film identification including film sensitivity is performed depending on whether the value is between the reference voltages, and an aperture control signal or the like is output.

In accordance with the stop control signal from the film identification circuit 28, the stop amount of the stop 30 disposed in the optical path between the taking lens 29 and the film 2 shown in FIG. Note that the film identification signal from the film identification circuit 28 may be output to the aperture control circuit, and the aperture of the aperture 30 may be controlled by the output of the aperture control circuit.

Further, the photographing lens 2 is operated by a release operation.
When an image of the subject is formed on the film 2 via the camera 9, a part of the light is guided to a photometric sensor (not shown), and the exposure is measured by the output of the photometric sensor. When the exposure amount suitable for photographing in the case of the identified film sensitivity is reached, exposure control for closing the shutter is performed.

Next, the operation of the present embodiment will be described. When performing an endoscope inspection using an endoscope (not shown), the film cassette 1 is loaded into the endoscope camera 21 and the endoscope camera 21 is attached to the eyepiece of the endoscope. The endoscope camera 21 according to the present embodiment is the same as the existing film cassette 1 except for the fixing tape 9, and the film identification means provided on the endoscope camera 21 side has a simple configuration. It is almost the same size and light weight as the existing one, and secures operability during endoscopy.

When the film cassette 1 is loaded into the endoscope camera 21 as shown in FIG. 1, the fixing tape 9 is positioned close to and opposed to the coil 25 provided on the endoscope camera 21 side.
Is located. The coil 25 may be formed by a solenoid, or may be a coil formed in a film or sheet shape by providing a spiral pattern on a flexible substrate.

FIG. 5 schematically shows this state. Coil 2
5, a conductive tape portion 15 of the fixed tape 9 corresponding to the film sensitivity of the film cassette 1 is positioned, and the conductive tape portion 15 electromagnetically coupled to the coil 25 through which a high-frequency oscillation signal of the oscillator 22 flows has its film. An eddy current flows according to the thickness and the like, and the high-frequency energy of the coil 25 is converted into heat energy and disappears, so that the amplitude value becomes smaller than the value in the no-load state (the state where the conductive tape portion 15 is not present).

Then, the peak value of the high-frequency oscillation signal at both ends of the coil 25 is detected by a detection circuit 27 serving as amplitude detection means, and the amplitude of the high-frequency signal is detected. This amplitude value is input to the film identification circuit 28, and is compared with a reference amplitude value and the like, and film identification such as film sensitivity is performed.

The film identification circuit 28 outputs an aperture control signal corresponding to the identified film sensitivity to the aperture 30, and sets the aperture to an appropriate value. As a result, when it is determined that the loaded film sensitivity is low, the aperture 30 is opened slightly, and when it is determined that the film sensitivity is high, the aperture 30 is closed slightly so that the sensitivity adjustment is automatically performed. Will be

When a release operation is performed, light passing through the photographing lens 29 is guided to the film 2 and a part of the light is guided to a photometric sensor (not shown), and the amount of exposure is detected by the output of the photometric sensor. The exposure is controlled by, for example, closing the shutter when the proper exposure is reached.

When one frame is photographed, the winding engaging portion 10 engaged with the winding claw (not shown) of the endoscope camera 21 rotates with the rotation of the winding claw, and the film 2 is wound by one frame. To prepare for the next frame.

When the film cassette 1 has been photographed for the number of frames that can be photographed and the film cassette 1 is taken out from the endoscope camera 21 and developed, the fixing tape 9 affixed to the film winding unit 4 is used. By removing the cover 7, the cover 7 is removed, and the photographed film 2 is removed from the case 6.
Can be taken out and development processing or the like can be performed.

According to this embodiment, the thickness of the high-frequency signal of the coil 25 is changed by the flowing eddy current in accordance with the film information such as the film sensitivity instead of the existing fixing tape such as a vinyl tape. The conductor tape portion 15 provided with the adhesive portion 16 for changing the value is connected to the film winding portion 4.
Since the cover 7 can be configured by being adhesively fixed, it can be provided simply and at low cost. In other words, it is possible to provide an inexpensive film cassette that can read the film sensitivity of the patrone without mechanical processing. Further, since no electrical contact is required, the possibility of contact failure due to temperature, humidity, dust, or dust can be eliminated, and the film identification information can be reliably read without any problem such as contact failure.

When the conductor tape portion 15 on the surface of the fixing tape 9 is brought close to the coil 25, an insulating film or the like is applied or coated to prevent the coil 25 from being electrically short-circuited by contact with the coil 25. It may be attached.

The size and thickness of the conductive tape portion 15
By changing the material, the voltage value of the detection circuit 27 changes. Therefore, it is possible to add film identification information according to the size and thickness of the conductive tape portion 15.

In the present embodiment, the film identification member formed by the conductor tape portion 15 which is arranged in a state of not mechanically contacting the oscillator 22 and has a film thickness and the like set according to the type of the film is used. The effect on the oscillation characteristics of the oscillator 22 is different (more specifically, the amplitude values of the high-frequency signals at both ends of the coil 25 are different).

In this case, even if a part of the conductive tape portion 15 is set in contact with the coil 25, the conductive tape portion 15 is provided so as to have basically different effects on the oscillation characteristics of the oscillator 22 without mechanical contact. As long as they are included, they are included in the present embodiment.

As the film identification circuit 28 in the first embodiment, the output of the detection circuit 27 is converted into digital data via a comparator, an A / D converter or the like, and the reference data stored in a ROM or the like. Compared to
Identification such as film sensitivity may be performed.

(Second Embodiment) FIG. 6 shows a second embodiment of the present invention.
1 shows a film cassette 1 according to the embodiment. For example, the film cassette 1 has a film winding portion 4 disposed near the coil 25 and a plastic member 35 containing metal.
It was molded in.

As in the first embodiment, the endoscope camera 21 is changed by changing the specific gravity of metal and plastic.
The high frequency signal flowing through the side coil 25 and the electromagnetic coupling
By eliminating the eddy current, the oscillation characteristics of the oscillator 22 are changed, and the change is converted, for example, from a high-frequency voltage across the coil 25 to a DC voltage by the detection circuit 27, and the amplitude value is detected. The identification is performed.

In this case, in the first embodiment, the conductor tape 15 corresponding to the film sensitivity is used as the fixing tape 9.
However, this embodiment has an advantage in that the same fixing tape 9 'may be simply applied, regardless of the film sensitivity or the like, as in the case of the existing one.

When the case portion 6 and the lid 7 are fixed with such a strength that the fitting portion can be removed with an adhesive or the like, the fixing with the fixing tape 9 'is unnecessary. Others
The third embodiment has substantially the same effects as the first embodiment.

(Third Embodiment) FIG. 7 shows a third embodiment of the present invention.
1 shows a film cassette 1 according to the embodiment. The film cassette 1 is wound around the outer cylinder 41 in the film winding section 4 every time one frame of the film 2 loaded in the film supply section 3 is photographed. The outer cylinder 41 includes an inner cylinder 42 which engages in the winding rotation direction, and forms a spool.

The inner cylinder 42 can slide inside the outer cylinder 41 in the direction of the rotation axis. Further, at one end of the inner cylinder 42, a winding engagement portion 10 which engages with a winding claw provided on the endoscope camera 21 side to wind the film 2.
Is provided.

In the present embodiment, a conductor 43 having a columnar shape or the like is placed in the inner cylinder 42 (for example, at the center axis portion). Also in this case, similarly to the first embodiment, the inner cylinder 4
By changing the size and the material of the conductor 43 in 2, electromagnetic coupling with a high-frequency signal flowing through the coil 25 on the endoscope camera 21 side causes the electric energy to disappear as an eddy current, thereby improving the oscillation characteristics of the oscillator 22. By changing the change and detecting the voltage value of the high-frequency signal at both ends of the coil 25, the film type can be determined. The effect of this embodiment is the same as that of the second embodiment.

(Fourth Embodiment) FIG. 8 shows a fourth embodiment of the present invention.
1 shows a film cassette 1 according to the embodiment. In the film cassette 1, a hole 52 is provided in a bridge portion 5 connecting the film supply portion 3 and the film winding portion 4 to receive, for example, a disk-shaped or column-shaped conductor 51. Hole 5
The number 2 may be one, or a plurality may be provided as shown in FIG.
The conductors 51 may be all inserted into the plurality of holes 52. However, as shown in FIG. 8, by inserting or not inserting the conductors 51 for each hole 52, it is possible to have a plurality of pieces of information per bit. is there.

Therefore, if there are four holes 52, the combination is 1
Since there are six types, 16 types of films can be identified. However, in this case, the hole 52 on the bridge 5
The coil 25 on the endoscope camera 21 side is arranged at a position near each time.

FIG. 9 shows a part of this detection system. Each hole 52
The coils 25 are respectively arranged at positions on the endoscope camera 21 side that are close to and adjacent to each other. One end of each coil 25 is common, and the other end is connected to the oscillator 22 via a changeover switch 53.

Then, the contacts a to
For example, by sequentially switching d one by one by a control signal of the film detection circuit 28, for example, it is detected whether or not the conductor 51 exists in the hole 52.

For example, in the state of FIG. 9, the contact a is selected, and in this case, it is detected whether or not the conductor 51 is in the leftmost hole 52 of FIG. Similarly, by switching to select another contact b or the like, it is possible to detect whether or not the conductor 51 exists in another hole 52.

The first to third embodiments use the coil 25.
Although the film information such as the film sensitivity is determined by detecting the amplitude value of the high-frequency signal flowing through the circuit, the present embodiment only needs to detect whether or not the conductor 51 is present. What is necessary is just to detect the difference between the amplitude value and the amplitude value when there is no conductor 51. For this reason, the allowable error range can be widened, and a large amount of information can be read accurately.

(Fifth Embodiment) FIG. 10 shows a fifth embodiment of the present invention. In the fourth embodiment, a plurality of conductors 51 are arranged in the bridge portion 5, whereas in the present embodiment, a plurality of elongated conductor tapes 55 are attached to the side surface of the film winding portion 4. As in the fourth embodiment, the coils 25 respectively corresponding to the conductive tapes 55 are provided on the camera 21 side as in the fourth embodiment.

In FIG. 10, four conductors 55 can be pasted (however, the conductor tape 55 is not pasted on the second from the top, and the pasting position is shown by a two-dot chain line). Therefore, it is possible to have 16 types of film information with or without the conductive tape 55.

The detection system of the conductor tape 55 can use the same configuration as that of FIG. Needless to say, it is desirable that the coils 25 face the positions where the conductor tapes 55 are to be attached and are located close to each other.

(Sixth Embodiment) FIG. 11 shows an electromagnetic absorbing element 61 and an equivalent circuit thereof according to a sixth embodiment of the present invention. In the present embodiment, for example, a plurality of holes 52 are provided in the bridge portion 5 as in FIG.
Can be accommodated.
As shown in FIG. 11A, the electromagnetic absorption element 61 is overlapped so that one electrode portion of the chip-type capacitor element 62 and one of the resistance elements 63 is conductive, and a conductive wire 64 is wound therearound, and the capacitor element 62 and the resistance element are connected to each other. The other electrode portions of the element 63 are electrically connected to form a circuit as shown in FIG.

In the equivalent circuit shown in FIG. 11B, a resonance circuit is formed by a coil L having a resistance R connected in series and a capacitor C, and the resonance frequency of this resonance circuit is adjusted by an oscillator 22.
Is set to a value that matches or is close to this oscillation frequency.

Therefore, this electromagnetic absorbing element 61 is
When placed near the second coil 25, the oscillation signal is efficiently captured by the resonance circuit, and the captured energy is quickly consumed by the resistor R.

Therefore, the oscillation signal of the oscillator 22 is consumed by the electromagnetic absorption element 61,
The amplitude of the oscillator 22 changes depending on the presence or absence of the electromagnetic absorption element 61. When the electromagnetic absorption element 61 is not provided, the amplitude hardly decreases (however,
Although it may decrease slightly depending on the members forming the bridge portion 5), the amplitude can be considerably reduced when the electromagnetic absorbing element 61 is provided.

Therefore, the presence or absence of the electromagnetic absorption element 61 is detected by the detection circuit 27 as described above, the amplitude at both ends of the coil 25 is detected, and the value is detected by comparing it with a threshold value by a comparator or the like. This makes it possible to identify film information such as film sensitivity, which is indicated by the presence or absence of the electromagnetic absorption element 61.

Instead of detecting the amplitude as described above, a detection system for detecting the high-frequency current of the oscillator 22 as shown in FIG. 12 may be used.

In FIG. 12, a resistor 71 having a small resistance value is provided at a portion of the oscillator 22 where a high-frequency current flows.
Is detected as a DC voltage. That is, peak detection is performed by a detection circuit 73 composed of a diode and a smoothing condenser via a DC blocking capacitor 72, and the detected value is input to a comparator 74 constituting the film identification circuit 28 and input to the other end. The presence / absence of the electromagnetic absorption element 61 is determined by comparing with a threshold value.

The determined binarized signal is supplied to the control circuit 76.
, And the control circuit 76 sequentially changes the contacts to sequentially take in the comparison signal of the comparator 74. When the four binarized signals are obtained, the values are stored in the EEPROM 77, and the film information stored in the EEPROM 77 is read using the values as addresses to obtain information such as film sensitivity.

Based on the information on the film sensitivity and the like, control such as setting the aperture amount of the aperture 30 by converting it into an aperture control signal is performed. This embodiment has the same effect as the fourth embodiment in FIG.

FIG. 13 shows a structure of a modification of FIG. In the electromagnetic absorbing element 61 of this modification, circular conductor plates 8 are provided at both ends of a cylindrical plastic member 81 mixed with metal powder.
2, a capacitor having a large loss (loss) component is formed, and a conductor 64 is wound around a column and both ends are connected to a conductor plate 82. The operation and effect of this modification are the same as those in the case of FIG.

In the first embodiment, the conductor tape portion 1 such as a metal plate is placed near the coil 25 constituting the oscillator 22.
5 has been described so that the eddy current flows through the conductive tape portion 15 so that the amplitude of the high-frequency signal of the coil 25 differs depending on the value of the eddy current. By arranging a dielectric or the like having a large loss component or a large dielectric constant with respect to the signal, the oscillation characteristics (specifically, for example, an amplitude value and a current value) of the oscillator 22 are changed by a change in load impedance when electromagnetically coupled. Anything that changes can be used.

In addition, the coil 2 constituting the oscillator 22
By arranging a conductor such as a metal plate near the reference numeral 5, film information such as film sensitivity can be identified by utilizing the fact that the oscillation frequency of the oscillator 22 changes due to the capacitance at the time of electromagnetic coupling. May be.

For example, the oscillator 2 is provided on the endoscope camera 21 side.
2, a frequency detection circuit for detecting the oscillation frequency may be provided, and film information may be identified by detecting the presence or absence of a conductor based on the output of the frequency detection circuit.

Note that the frequency detection circuit may be formed using a counter circuit or a resonance circuit (for example, a first circuit tuned to a first oscillation frequency when no conductor is present). Resonance circuit, a first detection circuit for detecting an output of the first resonance circuit, a second resonance circuit tuned to a shifted second oscillation frequency when a conductor is present, and a second resonance circuit A second detection circuit for detecting the output of the circuit is provided, and the presence or absence of the conductor is determined by comparing which of the outputs of the first and second detection circuits is larger.

Note that embodiments and the like constituted by partially combining the above-described embodiments and the like also belong to the present invention.

[Supplementary Notes] In an endoscope film cassette including a film supply unit, a film winding unit, and a bridge unit that connects the film supply unit and the film winding unit, the endoscope film cassette according to a film type. An endoscope film cassette, comprising: an oscillation characteristic changing member which is not mechanically connected to an oscillator of an endoscope camera to be loaded and has an influence on an oscillation characteristic of the oscillator.

2. In Appendix 1, the oscillation characteristic changing member is an amplitude changing member that affects the amplitude of an oscillation signal of the oscillator. 3. In Supplementary Note 1, the oscillation characteristic changing member is a current changing member that affects the current of the oscillation signal of the oscillator.

4. In Supplementary Note 1, the oscillation characteristic changing member is an oscillation frequency changing member that affects the oscillation frequency of the oscillator. 5. In Supplementary Note 2, the amplitude changing member includes a conductor.

6. In Supplementary Note 1, in the film winding portion, the film has a spool for winding the film,
The endoscope is characterized in that the spool has a two-body structure of an outer cylinder for film winding, and an inner cylinder having an engagement portion that is movable with the outer cylinder in a thrust direction and engages with a winding shaft of a camera. Mirror film cassette. 7. 2. The endoscope film cassette according to claim 1, wherein the oscillation characteristic changing member is formed in a sheet shape and attached to the film winding portion.

8. Appendix 1, wherein the film winding portion has a removable lid, and the oscillation characteristic changing member is formed in a sheet shape and stuck to both the case portion and the lid portion of the winding portion. Endoscope film cassette. 9. 2. The endoscope film cassette according to claim 1, wherein the oscillation characteristic changing member is a part obtained by molding a material of the film cassette with plastic containing a conductor.

10. 7. The endoscope film cassette according to claim 6, wherein the oscillation characteristic changing member is formed in the inner cylinder. 11. 7. The endoscope film cassette according to claim 6, wherein the conductor is embedded in the inner cylinder.

12. 2. The endoscope film cassette according to claim 1, wherein one or more of the oscillation characteristic changing members are arranged in the bridge portion. 13. 2. The endoscope film cassette according to claim 1, wherein the oscillation characteristic changing member has a plurality of band-shaped conductors wound around the film winding portion.

14. A film cassette for an endoscope having a film supply unit, a film winding unit, a spool for winding a film in the film winding unit, and a bridge unit connecting the film supply unit and the film winding unit; and the endoscope film. A cassette is loaded, a coil disposed at a position facing an oscillator and an oscillation characteristic changing member provided on the endoscope film cassette, a level detection circuit for detecting an oscillation level, and film identification from an output of the level detection circuit. And a camera having a film identification circuit for performing the operation of detecting the AC voltage generated at both ends of the coil disposed so as to face the oscillation characteristic changing member by the high-frequency current oscillated by the oscillator. And a change in the voltage detected by the level detection circuit. Photographing apparatus characterized by performing the film identified by Lum identification circuit.

15. An endoscope film cassette is loaded, comprising an oscillator, a coil disposed at a position facing an oscillation characteristic changing member in the endoscope film cassette, a camera having a level detection circuit and a film identification circuit, and oscillating by the oscillator. The level detection circuit detects an AC voltage generated at both ends of the coil disposed so as to face the oscillation characteristic changing member by the high frequency current, and a film identification circuit detects a change in the voltage detected from the level circuit. An endoscope camera for identifying a film.

[0078]

As described above, according to the present invention, an endoscope film comprising a film supply section, a film winding section, and a bridge section connecting the supply section and the winding section. In the cassette, the effect on the oscillation characteristics of the oscillator differs depending on the type of film stored and the like, without being mechanically connected to the oscillator on the endoscope camera side in which the endoscope film cassette is loaded. Since the film identification member is provided, problems such as contact failure do not occur, and information such as the type of the film can be reliably identified.

[Brief description of the drawings]

FIG. 1 is a diagram showing an endoscope film cassette according to a first embodiment of the present invention, together with the configuration of an endoscope camera.

FIG. 2 is a perspective view showing an endoscope film cassette.

FIG. 3 is a plan view and a rear view showing an endoscope film cassette.

FIG. 4 is a perspective view showing the structure of a fixing tape.

FIG. 5 is a block diagram showing a configuration of an identification unit provided on the endoscope camera side.

FIG. 6 is a perspective view showing an endoscope film cassette according to a second embodiment of the present invention.

FIG. 7 is a perspective view showing an endoscope film cassette according to a third embodiment of the present invention.

FIG. 8 is a perspective view showing an endoscope film cassette according to a fourth embodiment of the present invention.

FIG. 9 is a diagram showing a partial configuration of a film identification unit.

FIG. 10 is a perspective view showing a part of an endoscope film cassette according to a fifth embodiment of the present invention.

FIG. 11 is a diagram showing a structure and an equivalent circuit of an electromagnetic absorption element according to a sixth embodiment of the present invention.

FIG. 12 is a diagram showing a configuration of a film identification unit.

FIG. 13 is a diagram showing a structure of an electromagnetic absorption element according to a modification of the sixth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Film cassette (for endoscope) 2 ... Film 3 ... Film supply part 4 ... Film winding part 5 ... Bridge part 6 ... Case part 7 ... Lid body 8 ... Boundary surface 9 ... Fixed tape 10 ... Winding engagement part 15 ... Conductor tape part 16 ... Adhesive layer 21 ... Endoscope camera 22 ... Oscillator 24 ... Film cassette storage room 25 ... Coil 26 ... Condenser 27 ... Detection circuit 28 ... Film identification circuit 29 ... Shooting lens 30 ... Aperture

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Ryoichi Hosoya 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Industrial Co., Ltd. (72) Inventor Tomohiko Oda 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Kazuma Kaneko 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. Takeaki Nakamura 2-43, Hatagaya, Shibuya-ku, Tokyo No. 2 Inside Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. An endoscope film cassette comprising a film supply section, a film winding section, and a bridge section connecting the supply section and the winding section, wherein the type of film stored is Accordingly, the endoscope film cassette is not mechanically connected to the oscillator on the endoscope camera side in which the film cassette is loaded, and a film identification member having a different influence on the oscillation characteristics of the oscillator is provided. Endoscope film cassette.