JP3015232U - Film cassette - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a film cassette in which the parts of the biasing means are not lost when the film cassette is reused and which can be easily assembled. . According to the present invention, at least one end of a rotating shaft of a spool 9 is provided with an engaging claw portion which can be engaged with a hoisting shaft on a camera side.
The rotating shaft of the spool 9 is movably supported in the thrust direction between a projecting position where the case member forming the film winding portion 6 is projected outside the case and a storing position where the spool is housed inside. In addition, the film cassette is characterized in that a coil spring 27 for urging the rotating shaft of the spool toward the storage position is attached to the case member.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a film cassette used in, for example, an endoscope camera.

[0002]

[Prior art]

 As known from Japanese Examined Patent Publication No. 3-75849, a film cassette used for an endoscope camera has a film supply section and a film winding section, which are connected by a bridge. Inside the film winding section, a spool for winding the film fed from the film supply section is rotatably housed. The rotating shaft of the spool is supported by a cylindrical bearing formed by utilizing a part of the case of the film winding section, and also the position of protruding to the outside of the case and retracting to the inside of the case. It is supported so as to be movable in the thrust direction with respect to the position. In addition, the spool is biased by a coil spring that is provided separately from this spool in the direction that it retracts into the case, and by loading it in the cassette storage chamber of the endoscope camera and closing the back cover of the camera. With the push-up pin, the rotation shaft of the spool is projected from the case and is engaged with the locking claw of the drive shaft on the camera side.

[0003]

[Problems to be solved by the device]

 By the way, this type of film cassette is sent for development after taking a photograph, and then the parts other than the film, such as the case, spool, and coil spring, are disassembled separately. These parts are inspected, assembled, and provided again as a new film cassette.

However, among the reusable parts, the coil spring is reused because it is an elastic member and is smaller than other parts such as the case and the spool. Because of this, the cassette was often lost during disassembly or assembly. If this coil spring is lost, another one must be used when reassembling it.

Originally, the originally existing parts other than the film should be disassembled and then reassembled by adding a new film, but the coil spring must use a completely new part due to its loss. In that case, extra cost will be generated, and it will be out of consideration from the viewpoint of ease of assembly work.

The present invention has been made in view of the above circumstances, and its purpose is to prevent the parts of the biasing means from being lost when the film cassette is reused, and to assemble the film cassette. It is to provide an easy film cassette.

[0007]

[Means and Actions for Solving the Problems]

 According to another aspect of the present invention, there is provided a film cassette having a film supply section and a film winding section having a spool for winding the film delivered from the film supply section, wherein a camera is provided on at least one end of a rotating shaft of the spool. Is provided with an engaging claw that can be engaged with the winding shaft on the side, and the rotation shaft of this spool is housed inside the case where the film winding portion is projected outside the case. The case is provided with a biasing means that supports the spool so as to be movable in the thrust direction and biases the rotating shaft of the spool toward the storage position.

A second aspect of the invention is the device of the first aspect, wherein the urging means comprises an elastic member. A third aspect of the invention is the device of the first or second aspect, wherein the urging means has a bearing structure that is fitted to the rotation shaft of the spool.

According to a fourth aspect of the invention, in the first, second or third aspect of the invention, the biasing means and a case member to which the biasing means is attached are integrally formed. According to a fifth aspect of the invention, in the first, second, third or fourth aspect of the invention, the urging means is elastically attached to the case member.

[0010]

【Example】

 <First Embodiment> A first embodiment of the present invention will be described with reference to FIGS. 1 to 3. (Structure) The film cassette 1 according to this embodiment is used for an endoscope camera 2 as shown in FIG.

FIG. 1 shows an outline of a film cassette 1. A cassette body 3 of the film cassette 1 is provided with a film supply section 5 and a film winding section 6 which are connected to each other with a bridge 4 interposed therebetween. There is. An unexposed film 7 of, for example, 8 mm or 16 mm is housed in a wound state in the case of the film supply section 5. A spool 9 is housed in the case 8 of the film winding section 6 as described later. The film 7 fed from the outlet 5a of the film supply unit 5 is guided to the inside from the inlet 6a of the film winding unit 6, and is connected to the spool 9 so that the portion on the leading end side of the feeding of the film 7 is wound.

The film winding section 6 of the film cassette 1 is configured as shown in FIG. That is, the case 8 has a cylindrical configuration in which the open end of the bottomed tubular upper case 11 and the open end of the bottomed tubular lower case 12 are butted against each other and connected by adhesion or the like. An opening 13 is formed in the center of the end wall of the upper case 11, and an opening 14 is coaxially formed in the center of the end wall of the lower case 12. At the opening edge of the opening portion 14 of the lower case 12, a jetty 15 that projects upward in a cylindrical shape is formed. In the case 8, a spool 9 for winding the film 7 is rotatably housed between the opening 13 of the upper case 11 and the opening 14 of the lower case 12.

The spool 9 has an upper end portion and a lower end portion as shaft portions, and the above-mentioned jetty 15 is fitted into the lower end shaft portion 16 so that the spool 9 itself is movably engaged in the vertical direction (thrust direction). An annular groove 17 is formed. The outer diameter of the upper end shaft portion 18 of the spool 9 is adapted to the inner diameter of the opening portion 13 of the upper case 11, and the upper end shaft portion 18 can pass through the opening portion 13 and protrude to the outside of the upper case 11. There is. Further, since the spool 9 is vertically movable, the upper end shaft portion 18 of the spool 9 can be projected and retracted from the outer surface of the upper case 11. An engaging claw portion 20 that engages with the film winding shaft 19 of the endoscope camera 2 is formed on the outer end of the upper end shaft portion 18.

Further, an intermediate portion of the spool 9 forms an outer peripheral surface having a diameter larger than the outer diameter of the upper end shaft portion 18 like the outer diameter of the lower end shaft portion 16, and this portion serves as a winding peripheral portion 21. One kerf 22 is formed along the up-down direction in a part of the hoisting peripheral part 21, and a pin 23 is projectingly provided inside the kerf 22 to form an engaging part 24. There is. On the other hand, the leading edge portion 25 of the film 4 is formed with a narrow width, and the leading edge portion 25 is provided with a long hole 26 in the width direction thereof. Then, the most distal end portion 25 of the film 4 is inserted into the cut groove 22, the long hole 26 is engaged with the pin 23, and in this engaged state, the spool 9 is vertically movable with respect to the film 4. . That is, only the spool 9 can be moved in the vertical direction without moving the film 4.

Although the upper end shaft portion 18 of the spool 9 is smaller than the outer diameter of the winding peripheral portion 21, a coil spring 27 made of an elastic member is fitted on the upper end shaft portion 18 so as to wrap the upper end shaft portion 18. A bearing structure for supporting the bearing is constituted by. The upper end of the coil spring 27 is integrally attached to the upper case 11 by being adhesively fixed to the upper case 11. Here, the diameter of the opening portion 13, the inner diameter of the coil spring 27, and the outer diameter of the portion of the spool 9 extending from the upper end shaft portion 18 to the engaging claw portion 20 are substantially equal to each other, and are formed to be compatible with each other.

An annular receiving groove 28 is formed on a step end surface of a boundary between the upper end of the winding peripheral portion 21 of the spool 9 and the upper end shaft portion 18 having a diameter smaller than the upper end shaft portion 18, and a lower end which is a free end of a coil spring 27 is formed in the annular receiving groove 28. Are pressed and engaged. Then, the spool 9 is biased downward by the biasing force of the coil spring 27, and when not in use, the spool 9 is drawn into the case 8 and is completely stored. (Operation) When the film cassette 1 having the above-described configuration is used, as shown in FIG. 3, the back cover (not shown) of the cassette housing chamber 31 of the endoscope camera 2 is opened, and the cassette body 3 is placed in the cassette housing chamber 31. Plug in. Then, when the back cover is closed, the push-up pin 32 provided below the lower end shaft portion 16 of the spool 9 of the film winding portion 6 automatically rises to push up the spool 9 and the film winding shaft 19 The engaging claw portion 20 is engaged with and connected. This completes the loading. Further, when the film cassette 1 is taken out, the reverse procedure can be performed.

By the way, a coil spring 27 made of an elastic member is fitted on the upper end shaft portion 18 of the spool 9, and the coil spring 27 has a bearing function. That is, the coil spring 27 not only constitutes a biasing means for pushing back the spool 9, but also has a bearing function for the spool 9. Further, since the coil spring 27 is adhesively fixed to the upper case 11, it is integrated with the case 8. (Effect) In the film cassette 1 having the above-described structure, the coil spring 27, which is the urging means, is integrated with the member of the case 8. There is no possibility of losing the force means, and the assembly work becomes easier. <Second Embodiment> A second embodiment of the present invention will be described with reference to FIGS. 4 to 6. (Structure) This second embodiment shows an example in which the biasing means of the first embodiment is modified, and the other structure is substantially the same as that of the first embodiment.

The urging means in this embodiment is a pin spring 40 made of one elastic wire having a shape as shown in FIG. 6, which is a central portion 41 formed in a semicircular arc shape. Constricted portions 42 and 43 are formed on both end side portions, respectively, and spring portions 44 and 45 extending from the constricted portions 42 and 43 in substantially the same direction as the central portion 41 are provided. The distance between the inner ends of the constricted portions 42, 43 (the distance between the outer ends L1) is approximately equal to the diameter of the opening 13 of the upper case 11, and the portion before entering the constricted portions 42, 43, that is, the semicircle The longest distance (distance L2 between outer ends), which is the diameter of the arcuate central portion 41, is larger than the diameter of the opening 13 of the upper case 11. Furthermore, as shown in FIGS. 4 and 6, the spring portions 44, 45 extending from the constricted portions 42, 43 are bent in a dogleg shape outward from the outer peripheral surface of the upper end shaft portion 18 as shown in FIGS. 4 and 6. Locking portions 47 and 48 are formed.

Then, only by inserting and fitting the spring portions 44, 45 into the opening 13 of the upper case 11, the pin spring 40 is engaged with the opening 13 of the upper case 11 and fixedly fixed. You can wear it. As a result, a pin spring 40 is attached to the upper case 11 of the film cassette 1.

In this attached state, the spring portions 44 and 45 extend to the outer periphery of the upper end shaft portion 18 of the spool 9 and are fitted in contact with the peripheral surface thereof. Further, the tip ends of the spring portions 44 and 45 are inserted into the annular receiving groove 28 of the spool 9 and abut on the step end surface of the boundary between the upper end of the winding peripheral portion 21 and the upper end shaft portion 18. Further, as shown in FIG. 4, the spring portions 44 and 45 extending from the constricted portions 42 and 43 are bent in a dogleg shape in a direction away from the outer peripheral surface of the upper end shaft portion 18, and locking portions 47 and 48 are formed. By this action, the constricted portions 42 and 43 are engaged with the opening 13 of the upper case 11, and the pin spring 40 is attached so as not to easily come off. (Operation) The opening 13 of the upper case 11 and the constricted portions 42 and 43 of the pin spring 40 are engaged, and the diameter of the semicircular annular central portion 41 of the pin spring 40 and the maximum distance between the pin springs 40 are Is larger than the diameter of the opening 13 of the upper case 11, and the shortest distance between the constricted portions 42 and 43 of the pin spring 40 is almost equal to the diameter of the opening 13 of the upper case 11, so the pin spring 40 is The pin spring 40 can be integrally fixedly attached to the upper case 11 only by inserting the pin spring 40 into the opening 13. The dimensional relationship is the one when the pin spring 40 is attached to the opening 13 of the upper case 11, and is not limited to that in the free state. For example, the shortest distance L1 between the constricted portions 42, 43 may be larger than the diameter of the opening 13 of the upper case 11 in the free state. (Effect) In addition to the effect similar to that of the first embodiment, it is not necessary to bond the pin spring 40 as the urging means to the case 8 when attaching it to the case 8, and only by inserting the pin spring 40 into the opening 13 of the upper case 11. Since the film cassette 1 is good, the efficiency in assembling the film cassette 1 is improved, and the work efficiency is first when the film cassette 1 is disassembled and the biasing means is replaced when the biasing means is damaged. It is improved as compared with the embodiment. <Third Embodiment> A third embodiment of the present invention will be described with reference to FIGS. 7 to 9. (Structure) The basic structure of the film cassette 1 of this embodiment is the same as that of the above-described first embodiment. The difference from the first embodiment is that the upper case 11 itself is made of an elastic material such as rubber, and two ridges 51, 52 projecting inward are formed at the opening edge of the opening 13 thereof. The two jetty walls 51 and 52 are arranged symmetrically facing each other. In addition, the jetty 51, 52 is fitted to the inner end of the opening 13 of the upper case 11, and these are in a fitted state of contacting and engaging with the outer peripheral surface of the upper end shaft portion 18 of the spool 9, whereby the upper end shaft Supports the part 18. Further, the inwardly projecting tip of the cylindrical jetty 51 abuts on the step end surface at the boundary between the upper end of the winding peripheral portion 21 and the upper end shaft portion 18. The jetty 51, 52 constitutes a biasing means for biasing the spool 9 inward.

When the upper case 11 is made of an elastic material such as rubber as in this embodiment, the frictional resistance on the working surface is large when the protrusions 51 and 52 urge the spool 9. Therefore, it is desirable that a washer of metal or the like be engaged in the annular receiving groove 28 in which the protrusions 51 and 52 are in contact with the spool 9. (Operation and Effect) However, in this embodiment, since the protrusions 51 and 52 are a part of the upper case 11, the biasing means is not fixed to the case 8 but is integrated from the beginning. Therefore, the assembly item of fixing the biasing means to the case 8 is eliminated, and not only the biasing means can be lost, but also the assembly becomes easier. In this embodiment, the protrusions may be additionally provided, for example, four protrusions may be provided at equal intervals to support the upper end shaft portion.

[0022]

[Effect of device]

 As described above, according to the present invention, since the biasing means is attached to the case, the biasing means is not lost when the film cassette is reused or reassembled after disassembly, and , The efficiency of its assembly work is also improved.

[Brief description of drawings]

FIG. 1 is a bottom view of a film cassette according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the film winding portion of the film cassette.

FIG. 3 is a sectional view showing a state in which the film cassette is also loaded in an endoscope camera.

FIG. 4 is a sectional view of a film winding portion of a film cassette according to a second embodiment of the present invention.

FIG. 5 is a view of the film winding portion of the film cassette as seen from above.

FIG. 6 is a view showing a pin spring which is also a biasing means of the film cassette.

FIG. 7 is a sectional view of a film winding portion of a film cassette according to a third embodiment of the present invention.

FIG. 8 is a bottom view of the upper case of the film cassette.

9 is a side view of the upper case of the film cassette as seen from the direction of the arrow shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Film cassette, 2 ... Endoscope camera, 3 ... Cassette body, 4 ... Bridge, 5 ... Film supply part, 6 ... Film winding part, 7 ... Film, 8 ... Case, 9 ... Spool, 11 ... Upper part Case, 12 ... Lower case, 13 ... Opening part, 14 ... Opening part, 15 ... Jetty, 16 ... Lower end shaft part, 1
7 ... Annular groove, 18 ... Upper end shaft part, 20 ... Engaging claw part, 21 ...
Winding peripheral portion, 27 ... Coil spring, 40 ... Pin spring, 41
... central part, 42, 43 ... constricted part, 44, 45 ... spring part, 51, 52 ... jetty.

Continued Front Page (72) Akira Murata Akira Murata 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Katsuya Suzuki 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Within Kogyo Co., Ltd. (72) Inventor Shinichi Omori 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd.

Claims (5)

[Scope of utility model registration request] 1. A film cassette having a film supply section and a film winding section containing a spool for winding the film fed from the film supply section, wherein at least one end of a rotating shaft of the spool is provided on the camera side. An accommodating claw that is engageable with the winding shaft is provided, and the rotation shaft of this spool is protruded to the outside of the case with respect to the case forming the film take-up portion A film cassette, which is movably supported in a thrust direction between the position and a position, and has an urging means attached to the case for urging the rotation shaft of the spool toward the storage position. . 2. The film cassette according to claim 1, wherein the urging means comprises an elastic member. 3. The film cassette according to claim 1 or 2, wherein the urging means has a bearing structure which is fitted on the rotating shaft of the spool. 4. A film cassette according to claim 1, 2, or 3, wherein the urging means and a case member to which the urging means is attached are integrally formed. 5. A film cassette according to claim 1, claim 2, claim 3 or claim 4, wherein said urging means is elastically attached to and attached to a member of said case.