JP3389567B2 - Endoscope film cassette - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscopic film cassette used for taking endoscopic images.

[0002]

2. Description of the Related Art Conventionally, in a monitor image photographing device for an endoscope, it is performed to detect an abnormal winding of a camera, a non-loading of a film, etc. on the basis of a magnitude of a current supplied to a winding motor. It is devised in Japanese Patent No. 2862010.

On the other hand, as a method of properly using a plurality of endoscope film cassettes, a method of adding a fixed resistance to the film cassette in Japanese Patent No. 2647926 and discriminating the film information by the difference in the resistance value, and the applicant of the present invention In Japanese Patent Application No. 9-360734 previously filed by K.K., a method of discriminating film information is devised by counting the number of times a light beam is transmitted when the film winding engagement portion is rotated by a predetermined amount.

[0004]

However, in the conventional film cassette, the one for identifying the film information is formed by, for example, a fixed resistor, and the one for discriminating the film information by the difference in the resistance value, or the number of times the light beam passes. It discriminates the film information, and a plurality of different types are not provided.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an endoscope film cassette having a plurality of different types of identification means.

[0006]

A film cassette for an endoscope according to the present invention comprises a film supply section for accommodating a film, a film winding section for winding a film, the film supply section and a film winding section. In an endoscopic film cassette having a connecting bridge portion, a first film information having identifiable first film information is provided.
The above-mentioned film having the identification means and the second film information.
A second cover that can be identified according to the winding operation of the winding unit.
A first identifying target;
The means is a resistance in which the film information is identified by a resistance value.
A body, and the second identified means is the film information.
Information is identified by the number of rays that pass through the transmission, the fill
It is characterized in that it is a formed body of a transparent portion provided in the frame engaging portion .

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIGS. 1 to 4 relate to a first embodiment of the present invention. FIG. 1 is a block diagram showing a configuration of a monitor image photographing device, and FIG. 2 is a camera shown in FIG. 1 is a plan view of the film cassette loaded in the camera, FIG. 3 is a front view of the film cassette loaded in the camera of FIG. 1, and FIG.
FIG. 3 is a block diagram showing the connection relationship between the camera and the film cassette.

(Structure) As shown in FIG. 1, a monitor image photographing apparatus 1 includes a camera 3 in which an endoscope film cassette (hereinafter abbreviated as a film cassette) 2 according to the present embodiment and an electronic device. A monitor image photographing apparatus main body 5 having a CRT (not shown) for displaying an endoscopic image from the endoscope apparatus 4 and the camera 3 to the user for various states such as whether the film cassette 2 is loaded or not. For example, an LED 3a is provided as a notification means for notifying, and a control signal for controlling a power source, which will be described later, and a camera driving unit that performs operations such as hoisting of the camera and shutter is provided via a connection connector (not shown). It is sent from the apparatus main body 5.

Further, from the camera 3, the film information, which will be described later, detected from the film cassette 2 and the information such as the winding abnormality of the camera are sent to the monitor image photographing apparatus main body 5 by communication. In addition, from the electronic endoscope device 4,
The video signal of the endoscopic image is constantly monitored by the monitor image capturing apparatus 1
And when the user takes a photo,
A release signal is sent.

As shown in FIGS. 2 and 3, the film cassette 2 according to the present embodiment has a film supply section 6 in which a film 2a having different film sensitivity, the number of films, a color temperature type, etc. Winding section 7 for winding the completed film 2a, and this film winding section 7
And a bridge portion 8 connecting the film supply portion 6 and the film supply portion 6 are integrally formed.

When the film cassette 2 is loaded into the camera 3, the resistance value (film value, such as film sensitivity, the number of films, color temperature type, etc., is displayed at the portion of the film supply section 6 side which is in contact with the body of the camera 3. A resistance film 9 coated with a transparent conductive paint having a resistance value depending on the type of 2a) is attached.

As shown in FIG. 4, two predetermined locations of the resistance film 9 (resistance value R) provided on the film cassette 2 are as follows.
Two contacts 11 and 12 inside the body of the camera 3 make contact. Further, the contact 11 is a fixed resistor 13
(Resistance value R0) and power supply 14 are connected in series, and contact 12
Has a structure in which GND is connected.

Further, inside the body of the camera 3, an A / D converter 15 for converting the voltage value of the contact 11 into a digital signal,
A CPU 16 that reads the voltage value of the contact 11 that has become a digital signal by the A / D converter 15 and a camera drive unit 17 that is controlled by the CPU 16 based on the voltage value of the contact 11 that has become a digital signal are provided. LED on the surface
3a is provided.

(Operation) In this embodiment, when the camera 3 is loaded with the film cassette 2, the electric potential of the power supply 14 is changed by the resistance film 9 and the resistance values R0 and R0 of the fixed resistance 13 inside the main body of the camera 3. E (V) is divided, and the divided voltage value is A / D converted by the A / D converter 15 and input to the CPU 16.

The CPU 16 detects the film information of the film cassette 2 in accordance with the partial pressure value, controls the camera driving unit 17, and communicates the above-mentioned film information to the monitor image photographing apparatus main body 5 to monitor it. Image capturing device 1
However, it operates so as to perform optimum exposure control according to the type of the film cassette 2.

When the film cassette 2 is not loaded in the camera 3, the resistance value R is open, so that A
The value obtained by the D / D conversion almost indicates the electric potential E (V) of the power source 14, and therefore by reading this value by the CPU 16, the unloaded (nf) of the film cassette can be detected, and the CPU 13 detects that the film cassette 2 is not in the camera 3. When it is determined that the film is loaded, the LED 3a is turned on and the user is notified that "the film cassette is not loaded".

(Effect) As described above, in the present embodiment, C
The PU 13 is the fixed film 1 and the resistance film 9 of the film cassette 2.
3 detects the film information of the film cassette 2,
In particular, it monitors whether the potential of the contact 11 when the film cassette 2 is not loaded is the potential E (V) of the power supply 14, and when the film cassette 2 is not loaded, the LED 3a is turned on. Even without the current detection circuit, the presence / absence of the loading of the film cassette can be reliably detected, and the user can be notified.

Although the user is notified by turning on the LED 3a when the film cassette 2 is not loaded, a sound from a buzzer (not shown) or the electronic endoscope device 4 is used.
The user may be notified that the film cassette 2 is unloaded (nf) by superimposing a warning text on the endoscopic image of FIG.

(Second Embodiment) FIGS. 5 to 16 relate to a second embodiment of the present invention. FIG. 5 is a plan view of a film cassette, and FIG. 6 is a partial sectional view of the film cassette of FIG. 7 is a front view including the drawings, FIG. 7 is an explanatory view for explaining the configuration of the film information section provided in the engaging portion of the film cassette in FIG. 5, and FIG. 8 is an explanation for explaining the relationship between the film information section in FIG. 7 and the camera. FIG. 9 is an explanatory view for explaining the relationship between the groove forming the film winding portion of FIG. 5, the light emitter and the light receiver, and FIG. 10 is a block diagram showing a schematic configuration of a camera in which the film cassette of FIG. 5 is loaded. 11 is an explanatory view for explaining an engagement state between the engagement portion and the winding engagement claw of FIG. 8, and FIG.
2 is a flowchart showing the operation of the camera of FIG. 10, FIG.
3 is a first explanatory view for explaining the non-light-receiving state of the film information section when the engagement state between the engagement portion and the winding engagement claw in FIG. 8 is viewed from above, and FIG. 14 is the engagement portion and the winding up state in FIG. FIG. 15 is a second explanatory diagram for explaining a non-light-receiving state of the film information section when the engagement state with the engagement claw is viewed from above, and FIG. 15 shows the engagement state between the engagement section and the winding engagement claw in FIG. FIG. 16 is an explanatory view for explaining a light receiving state of the film information section as seen from FIG. 16, and FIG. 16 is a timing chart of a signal inputted to the identification circuit of FIG. 10 when a light ray transmitted through the film information section is received.

Since the second embodiment is almost the same as the first embodiment, only different points will be described, the same components will be denoted by the same reference numerals, and description thereof will be omitted.

(Structure) As shown in FIGS. 5 and 6, in the film cassette 2 of the present embodiment, the film information section in which the film winding section 7 is engaged with the film winding engagement claw 31 provided in the camera 3. An engaging shaft 24 having an engaging portion 24a provided at one end is rotatably arranged. Reference numeral 32 makes contact with the rear end surface of the engagement shaft 24 in order to engage the engagement portion 24a provided at the tip end portion of the engagement shaft 24 with the winding engagement claw 31 of the camera 3. It is a push-up pin provided on the camera 3 for pushing and moving the engaging shaft 24 toward the engaging claw side.

As shown in FIG. 7, the winding engaging claw 31 provided on the camera 3 is engaged with the engaging portion 24a provided at one end of the engaging shaft 24, and information for each film type is displayed. A plurality of groove portions 25a forming the film information portion 25 shown
Are formed. The groove 25a is formed with a predetermined width and depth from one outer peripheral surface side to the other outer peripheral surface side so as to be orthogonal to the central axis of the engaging shaft 24. It is changing. That is, the film is formed by forming four groove portions 25a radially at equal intervals as shown in FIG. 11A or by forming three groove portions 25a radially at equal intervals as shown in FIG. The type can be identified.

As shown in FIG. 8, in the camera 3 in which the film winding unit 7 of the film cassette 2 is loaded, a pair of light emitting units 33 and a light receiving unit 34 serving as a light receiving unit are provided so as to face each other. The engaging claw 3 is provided on the optical axis that blocks the light beam emitted from the light emitting device 33 toward the light receiving device 34.
1 is located.

Further, when the engaging shaft 24 is moved to the winding engaging claw 31 side by the push-up pin 32 so that the engaging portion 24a projects from the film winding portion 7, FIG.
As shown in, the film information section 25 formed on the engaging portion 24 a is arranged between the light emitting device 33 and the light receiving device 34.

Specifically, the central axis of the engaging shaft 24 and the optical axis of the light beam emitted from the light emitting device 33 toward the light receiving device 34 are orthogonal to each other. Therefore, when the groove 25a is located on the optical axis of the light beam emitted from the light emitter 33 toward the light receiver 34, the light beam emitted from the light emitter 33 passes through the groove 25a and is received by the light receiver. Reach 34.
The winding engagement claw 31 is omitted in this figure.

As shown in FIG. 10, the camera 3 has a pair of light emitters 33, which are, for example, light emitting diodes and light receivers 34, which are, for example, phototransistors, and a film 2a wound in the film cassette 10. Discriminating circuit 35 which is a circuit for discriminating the type of
The camera drive circuit 36, which is a circuit for setting imaging conditions based on the identification result in 1) and a circuit for imaging an endoscopic image, is provided. Further, the camera drive circuit 36 is connected to a timer circuit 37 that measures the time from the start of the film winding operation, and compares the winding time measured by the timer circuit 37 with a preset expected winding time. It is like this.

Incidentally, as shown in FIG. 11, the engaging shaft 24 is wound up by the push-up pin 32, and the engaging claw 31 is wound up.
When it is moved to the side, the winding engaging claw 31 is moved to the engaging shaft 24.
1 of the plurality of groove portions 25a formed in the engaging portion 24a of
The engagement shaft 24 can be rotated by engaging with one of them.

Further, the engaging shaft 2 of the winding engaging claw 31.
The front end on the fourth side has a thickness that can be engaged with the width of the groove 25a, and is formed in a plate shape having a substantially U-shaped notch opened to the engagement shaft 24 side. Further, the width of the cutout is set such that the winding engagement claw 31 is formed in the groove portion 25.
All the remaining groove portions 25a which are not engaged with the winding engagement claw 31 when they are engaged with a can penetrate through the engagement shaft 24 in the diametrical direction.

(Operation) The film winding operation will be described with reference to the flowchart of FIG.

First, as shown in FIG. 12, step S1
Then, the film cassette 2 is loaded into the camera 3. Then,
The push-up pin 32 moves the engaging shaft 24 to the winding engaging claw 31 side, and the winding engaging claw 31 and the engaging portion 24a of the engaging shaft 24 are engaged as shown in FIG. 11 and, for example, FIG. And the film can be wound up, and the process goes to step S2 to turn on the light emitter 33. Therefore, the light emitting device 33 enters a film type detection state in which light rays are emitted toward the light receiving device 34.

Next, in step S3, the film 2
In order to perform the idle winding operation of a, the winding engagement claw 31 is rotated. Then, in step S4, the engaging portion 24a engaged with the winding engaging claw 31 is rotated and the engaging shaft 24 is rotated.

As a result, for example, as shown in FIG. 13, the engagement shaft 24 moves in the direction of the arrow from the state where the light beam emitted from the light emitting device 33 is blocked by the winding engagement claw 31 and does not reach the light receiving device 34. It rotates and is blocked by the outer peripheral surface of the engaging portion 24a as shown in FIG.
State that the light beam emitted from does not reach the light receiver 34,
Then, as shown in FIG. 15, the light beam emitted from the light emitting device 33 passes through the groove 25a and reaches the light receiving device 34, and it is determined whether or not it has reached the light receiving device 34. When the light beam from the light emitting device 33 is incident on the light emitting device 33, the light beam incident on the light emitting device 33 is counted in step S5.

For example, if four groove portions 25a are formed in the engaging portion 24a as shown in FIG.
As shown in (a), the photodetector 34 has 6
The ray of light passes through the groove 25a.

Further, as shown in FIG. 7B, the engaging portion 2
If three grooves 25a are formed in 4a, as shown in FIG.
As shown in (b), the light beam is passed through the groove 25a four times per rotation to the light receiver 34.

Next, in step S6, the light emitter 3
Whether or not the film cassette 2 is loaded is determined by determining whether or not the count value n, which is the number of times the light beam is incident on 3, is greater than 1. When the film cassette 2 is not loaded (nf), as shown in FIG. 16C, the light beam is not blocked by the groove 25a and constantly passes through the light receiver 34. That is, when the winding operation is performed while the film cassette 2 is not loaded, the light beam emitted from the light emitting device 33 is not blocked by the engaging claws 31 and therefore reaches the light receiving device 34 constantly. , ON /
There is no OFF operation. Whether or not the film cassette 2 is loaded is determined by detecting this state.

If the film cassette 2 is loaded in step S6, the process proceeds to step S7. If the film cassette 2 is not loaded, the LED 3a provided in the camera 3 is turned on in step S8 to turn on the film cassette. Notify the user that it is unloaded (nf). Although not particularly shown, the user is informed that the film cassette is not loaded (nf) by sounding a buzzer or superimposing a warning text on the endoscopic image of the electronic endoscope apparatus 4. You may make an announcement.

In step S7, a winding abnormality is determined by determining whether or not the time elapsed from the start of the winding timed by the timer circuit 37 is within the preset winding loading time range.

That is, when the film cassette 2 is loaded and the winding operation is normally performed, the light beam emitted from the light emitting device 33 reaches the light receiving device 34 while being blocked by the engaging claw 31. ON / O
The FF operation is performed.

The interval of this ON / OFF operation is shown in FIG.
Groove 2 showing film information as shown in (a) and (b)
It is uniquely determined by the shape of 5a and the film winding speed. In the case of a winding abnormality (mt) in which the film cassette 2 is not wound normally,
As shown in (d), the photodetector 34 exceeds the predetermined time t.
The light beam per rotation passes through the groove 25a.

Therefore, if the winding operation is not normally performed while the film cassette 2 is loaded, the ON / OFF interval described above should exceed the predetermined range t. By detecting this state, the winding abnormality of the film cassette 2 is determined.

If the winding operation of the film cassette 2 is normally performed in step S7, the process proceeds to step S9. If the winding operation of the film cassette 2 is not normally performed, the film cassette in step S8 is By the same means as in the case of no loading (nf), the user is notified of the winding abnormality (mt) in step S10.

In step S9, it is determined whether or not the initial winding operation is completed. When it is determined in step S9 that the initial winding operation is continuing, the process returns to step S4, and the number of light rays from the photodetector 33 incident on the photodetector 34 is continuously counted.

When it is determined in step S9 that the initial winding operation is completed, the process proceeds to step S11 to output the number of light rays reaching the light receiver 34 from the light emitter 33 to the identification circuit 35, and then to step S12. Light emitter 3
After stopping the light emission of 3, the camera drive circuit 36 discriminates the film type from the numerical value of the detection result based on the last value output to the discrimination circuit 35 in step S13, and after discrimination, In step S14, the control mechanism on the camera side is controlled by using a comparator, a CPU, and the like (not shown) in the camera 3 to set imaging conditions and the like to set the endoscope imaging state.

(Effect) As described above, in the present embodiment, the engaging portion 2 at one end of the engaging shaft that constitutes the film cassette 2 is used.
4a is provided with a groove 25a which serves as a film information section for identifying the type of film wound on the film cassette 2, and a pair of light emitter 33 and light receiver 34 corresponding to the groove 25a are provided on the camera 3 side. Provided on the engaging shaft 14
By detecting the number of times the light is emitted from the light emitting device 33, passes through the groove portion 25a and reaches the light receiving device 34 when the film cassette 2 is rotated by a predetermined amount, the information of the film cassette 2 can be reliably identified and the film cassette can be surely identified. 2 can be surely identified as unloaded (nf), and the LED 3a is turned on when the film cassette 2 is not loaded. Therefore, even if the monitor image capturing apparatus 1 does not have a current detection circuit for the winding motor, It is possible to reliably detect the presence / absence of the loading, and notify the user.

Further, the winding abnormality (mt) of the film cassette 2 can be surely identified by determining not only the number of times the light receiver 34 reaches the above-mentioned light receiving unit 34 but also whether the arrival interval exceeds a predetermined time t. The user can be notified by turning on the LED 3a.

Furthermore, the film cassette 2 is not loaded (n
If the resistance detection shown in the first embodiment is also used for the identification of f), the unloaded (nf) of the film cassette 2 can be detected before the winding operation of the film 2a is performed. The unloaded (nf) state of the film cassette 2 can be identified immediately and more reliably and stably.

[Additional Notes] (Additional Item 1) An apparatus main body having a CRT for displaying an endoscopic image and an endoscope image attached to the apparatus main body and displayed on the CRT are photographed and film information is set. In a monitor image photographing apparatus equipped with a camera capable of loading a film cassette equipped with a setting means and using a motor for film winding, a detection means for detecting at least an unloaded state of the film cassette in the camera, and the detection means. A monitor image photographing apparatus, comprising: a notification means for notifying an abnormality content based on a detection result of the means.

(Additional Item 2) The monitor according to Additional Item 1, wherein the detecting means detects a case where the setting means cannot be detected as an unloaded state of the film cassette in the camera. Image capture device.

(Additional Item 3) The monitor image photographing device according to Additional Item 1 or 2, wherein the setting means is a fixed resistor provided in the film cassette.

(Additional Item 4) The setting means is a plurality of transmissive portions that are provided in the winding engagement portion of the film cassette and that transmit light rays from the light emitting portion provided in the camera. The monitor image capturing device according to appendix 1 or 2.

(Additional Item 5) The additional item 4 is characterized in that the detecting means detects, when a predetermined amount of the plurality of transparent portions cannot be detected, as an unloaded state of the film cassette in the camera. The monitor image capturing device described in.

(Additional Item 6) The monitor image photographing apparatus according to any one of additional items 1 to 5, wherein the detection means detects a film winding abnormality of the film cassette.

[0054]

As described above, according to the present invention, it is possible to provide an endoscopic film cassette having a plurality of different types of identification means.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a monitor image capturing device according to a first embodiment of the present invention.

FIG. 2 is a plan view of a film cassette loaded in the camera of FIG.

FIG. 3 is a front view of a film cassette loaded in the camera of FIG.

FIG. 4 is a block diagram showing a connection relationship between the camera of FIG. 1 and a film cassette.

FIG. 5 is a plan view of a film cassette according to a second embodiment of the present invention.

6 is a front view including a partial cross-sectional view of the film cassette of FIG.

FIG. 7 is an explanatory diagram illustrating a configuration of a film information section provided in an engaging section of the film cassette of FIG.

FIG. 8 is an explanatory diagram illustrating the relationship between the film information section of FIG. 7 and a camera.

FIG. 9 is an explanatory view for explaining the relationship between the groove forming the film winding portion of FIG. 5 and the light emitter and the light receiver.

10 is a block diagram showing a schematic configuration of a camera in which the film cassette of FIG. 5 is loaded.

11 is an explanatory view for explaining an engagement state between the engagement portion and the winding engagement claw of FIG. 8,

12 is a flowchart showing the operation of the camera of FIG.

FIG. 13 is a first explanatory diagram for explaining a non-light-receiving state of the film information section when the engagement state between the engagement portion and the winding engagement claw of FIG. 8 is viewed from above.

FIG. 14 is a second explanatory view for explaining the non-light receiving state of the film information section when the engagement state between the engagement portion and the winding engagement claw of FIG. 8 is viewed from above.

15 is an explanatory view for explaining the light receiving state of the film information section when the engagement state between the engagement portion and the winding engagement claw of FIG. 8 is viewed from above.

16 is a timing chart of signals input to the identification circuit of FIG. 10 when a light ray transmitted through a film information section is received.

[Explanation of symbols]

1 ... Monitor image capturing device 2 ... Film cassette 2a ... film 3 ... camera 3a ... LED 4 ... Electronic endoscope device 5 ... Monitor image capturing device body 6 ... Film supply section 7 ... Winding section 8 ... Bridge 9 ... Resistive film 11, 12 ... Contact 13 ... Fixed resistance 14 ... Power supply 15 ... A / D converter 16 ... CPU 17 ... Camera drive unit

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) G03C 3/00 572 G03C 3/00 571 A61B 1/04 360 G03B 17/26

Claims (2)

(57) [Claims] And 1. A film film supply unit for housing and a film winding unit for winding up the film, in endoscopic film cassette having a bridge portion connecting the film supply and film winding unit, identification First identified hand with possible first film information
And a roll of the film winding section having a step and second film information.
A film cassette for an endoscope, comprising: a second means to be identified , which can be identified according to a lifting operation . Wherein said first object identifying means, the film information is the resistor that is identified by the value of the resistor, the second
The identification means of said film information, light is identified by the number of passes through the transmissive portion, the endoscope according to claim 1, characterized in that it is a form of transmitting portion provided in the film engaging portion Film cassette for mirrors.