JPS59146037A - Film cassette - Google Patents

Abstract

PURPOSE:To easily load and unload film cassette and to reduce its size by forming a spool of a film take-up member and an engagement member which engages with a film winding shaft, and allowing the engagement member to move freely in a thrust direction. CONSTITUTION:The spool 20 of the cassette body 1 consists of the engagement 21 and the film take-up member 22 which engages it rotatably, and a film storage chamber 23 is formed at its outer circumference. A compression spring 28 which engages a rotating shaft 25 is interposed between the top surface of the engagement member 21 and the reverse surface of the film take-up member 22, and an axial projecting streak 29 is provided at some part of the rotating shaft 25 and engages with an engagement groove 30 cut in the engagement hole 22a of the film take-up member 22; the engagement member 21 is movable in the thrust direction, but its motion in a rotational direction is transmitted to the film take- up member 22. Consequently, the engagement pawl part 26 at the upper end of this engagement member 21 is engaged with the pawl part of the film winding shaft to take up a film.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film cassette used, for example, in an endoscopic camera.

An endoscopic film cassette is comprised of a film supply section and a film winding section with a bridge in between.

In the film winding portion of the film cassette, a spool for winding the film is rotatably housed, and an engaging pawl integrated with the spool is exposed on the top surface of the film cassette. On the other hand, an endoscope camera has an opening/closing lid pivoted on the back side of the camera body, and by opening the opening/closing lid, the cassette storage area inside the camera body can be fully loaded with a second film cassette. .

In this case, the film cassette is loaded into the cassette storage chamber by sliding it from the back of the camera body in the optical axis direction, so when loading the film cassette is Avoid interference with the film cassette Z)
For this purpose, the film winding shaft is configured to be able to move up and down, and is retracted upward when loading a film cassette, and after loading, is lowered and engaged with an engaging claw of a film cassette. It's haha.

However, allowing the film winding shaft to be extended twice has the disadvantage that the sieve size of the camera body becomes larger by the stroke, and the mechanism becomes more complicated. In addition, when removing the film cassette from the camera after shooting, it is necessary to remove the film cassette while retracting the shaft to the top, making it troublesome to remove the film cassette. There is compassion.

This invention has been made by paying attention to the circumstances of ``2, I'41,'' and its purpose is to connect the film winding assembly to the film winding assembly and the camera's film winding assembly. It is formed by a double shaft and an engaging member that engages, and the engaging member is movable in the thrust direction, making it easy to attach and detach the film cassette to and from the camera. The purpose of this invention is to provide a film cassette-t that can be used in various ways.

Hereinafter, this invention will be explained based on one embodiment shown in the drawings. Figures 1 and 2 do not show the endoscope film cassette, and 1 is the cassette body. This filter supply section 3 stores an unexposed film 5 of, for example, 8 mm or 16 Inm in a wound state, and one end of this film is connected to a spool described later in the film winding section 4. 2θ
Figures 3 and 4 show the endoscope camera connected to 7.
is the camera body. The camera body 61 is provided with a cassette storage chamber 7 into which the cassette body is loaded. An opening/closing lid 9 for opening and closing the opening section 8 of the cassette storage chamber 7 is pivotally attached to the back side of the camera body 6.

Then, open the opening/closing lid 9 and insert the cassette body 1:
The cassette is loaded into the cassette storage chamber 7 by sliding the camera body 6 in the direction of its optical axis.
)ing.

Next, `` - Recorded cassette body 1t 2L% OJ
1 and 10, which will be explained in detail based on FIGS. 5 and 6, are the lower case and 1 is the upper case.

In this lower case IQ, a first cylindrical part 12 forming the film supply part 3 and a second cylindrical part 13 forming the entire film winding part 4 close the 1" part between the upper surfaces of the bridge 13. The cover body 14.15 is provided with an open part 16.
1-1 A jetty 17 projecting upward is provided at the opening edge of the opening 16. As shown in FIG. In addition, the lid body 15 also has a larger diameter opening [1=l
Xys is provided, and a jetty 19 protruding toward the opening is provided on the edge of this opening [-1 section 18]. A spool 2Q is rotatably fitted between these open parts 16 and 18. This spool 20 is composed of an engaging member 21 and a film/take-up part assembly 22 that fits into the engaging member 21, and a film storage chamber 23 is formed entirely around the outer periphery of the spool 20.
There is C. That is, at the bottom of the second cylindrical portion 13, a cylindrical 6-pin engagement member 21 is provided. ), and an annular vortex 24 that fits into the protrusion 17 is carved on its lower surface.

Therefore, the bottom part 21h ((J open L1 part 16) of the engaging member 2 is exposed. Furthermore, a rotating shaft 25 is provided protruding from the axial center of the engaging member 21. A retaining claw part 26 is provided at the upper end.
This [(the fitting hole 22 a of the l1 film winding member 22 fits into the monthly rotating shaft 25 at 1/i) LC0, this film winding part ( ] 22 is circular like the above-mentioned engaging member. It has a columnar shape f, c L, and its upper end face is carved with an annular /'l1li27 that fits into the jetty 19 of the above-mentioned body 15.Furthermore, the upper face of the above-mentioned engaging member 21 and the film winding member 22 A compression spring 28 that fits into the rotating shaft 25 is interposed between the lower surface of the rotary shaft 25 and the engaging member 21 is always forced downward, that is, in the direction in which the engaging claw portion 26 is recessed. A protrusion 29 extending along the axial direction is provided on a part of the rotating shaft 25 of the engagement member 21', and the fitting hole 22aVC of the film winding portion (A 22) facing the protrusion 29 is engraved with an engagement hole 7h30. The protrusion 29 and the engagement groove 30 are engaged with each other, and the movement direction is freely movable by ω1, but (11
The rolling force is transmitted, and the rotation of the engaging portion 112 is caused by the rotation of the film winding member 2; 1) Also, the outer diameter k D of the upper i film winding member 22! ,
When the outer diameter of the engaging member 21 is k D 2 , D1≧D2
There is a relationship such that one side of the film 5 wound around the outer periphery of the film winding part +) i22 is also engaged by the winding force on the member 2, but even in this state, the engaging part + )J21
So that 1 paddy can be transferred in the direction of Sufst ((1,
However, after winding the film 5, the film 5 becomes loose and the engaging part 1 inside the winding (as the sheep spreads out).
2] can move in the fast direction without resistance.

Next, the camera body 6 will be explained in detail based on FIG. 7-C. That is, 34 is a support part provided in the cassette storage chamber 7, and is fixed by a plurality of support stands 36 protruding from the bottom 35 of the cassette storage chamber 7. Therefore, this support member 35 is spaced apart from the bottom 3.5 of the cassette storage chamber 7, and a pivot shaft 37 is pivotally supported on the front edge thereof. So'c, this pivot shaft 3
The end of the opening/closing case 90 is pivotally attached to the opening/closing case 7, and is attached to open/close the opening part 8 of the cassette storage chamber 7. Also, on both sides of the support member 34, support walls 38 are installed along both sides of the cassette storage.
38 is bent, and this force support part 38
That is, upper iC: film winding section 4 of cassette body 1
A slide plate 39 is provided on each opposing side. This slide plate 39 (formed in a 5-shape like C) has a vertical plate 4θ on the outer surface of the support wall 38, and a horizontal plate 41 on the support member 3.
They are respectively h opposite to the F part of 4. Further, in the vertical plate 4θt of the slide plate 39, a long hole 42°42 in the vertical direction is bored, and this one long hole 42.42 is connected to the support wall 38v(-
A protruding bottle 43.43 is inserted. The slide plate 39 straddles the pin 4 which engages with the elongated hole 42.
,? , 4.7 so as to be slidable in the direction below the soil, and is constantly urged upward by a biasing spring 44. Further, a push-up pin 45 is protruded from the horizontal plate 4 of the slide plate 39, and a through hole 45a is bored in the supporting member 34 opposite to the push-up pin 45. 7. Then, with this push, the engaging portion 4 of the cassette body 1 which is loaded into the support portion 34 is connected to the engaging portion 4.
-421's bottom 21a has a rotating sliding plate, ? 9 rises [7 comes into contact with the bottom oil 21a and the engaging member 21 fails:
It becomes possible to push up against the restoring force of the compression spring 28.

1) A 10 spool 2 is installed in the upper part of the cassette storage chamber 7, and a 10 spool 2
By pushing up the engagement member 21 of No. 0, the engagement claw portion 26 of E can be engaged.

In addition, a notch 48 is provided at or 4θ of the slide plate 39, and an engaging stepped portion 49 is formed at F of this notch 48. A lock lever 51, which can be freely rotated about the bottle 50, is pivotally supported on the support wall 38 facing the notch 48, and is biased in the counterclockwise direction VC by a biasing spring 52 VCr. The upper end of this lock lever 5 has the above-mentioned opening/closing fitting 9.
An operating part 5 is provided on the back surface of the holding part 5, which faces the suppressing part 53, and an engaging part 55 is provided at the lower end thereof. Therefore, this lock lever 5 responds to the opening/closing lid 9, and is biased by the biasing spring 52 when opening.
Due to the restoring force, the engaging part rotates 310,000 times counterclockwise! Te5
engages with the engagement stepped portion 49 to lock the slide plate 39 in the lowered position, and when the slide plate 39 is closed, the suppression portion 53
/C is pressed and turned clockwise to retract the engaging portion 55 from the engaging stepped portion 49 and release the I knock.

Next, the operation of attaching and detaching the cassette body 1 to and from the camera body 6 configured as described above will be explained. When the opening/closing lid 9f of the camera body 6 is in the open state 71, the lock lever 51i-i is rotated counterclockwise by the restoring force of the biasing spring 52, as shown by the two-dot chain line in FIG. ! 1. Therefore, the engaging portion 55 engages with the engaging crotch portion 49 of the slide plate 39, and holds the slide plate 39 in a downwardly lowered state. In this state, when the cassette body 1 is inserted into the cassette storage chamber 7 of the camera body 6 from behind in the optical axis direction, the cassette body 1 is inserted into the support part 3 of the cassette storage chamber 7.
jiit on 4! It is Eled. After loading the cassette main body 1 into a predetermined position in the cassette storage chamber 7, when the opening/closing lid 9 is closed, the operating portion 54 of the lock lever 5I
is pressed by the suppressing part 53. Therefore, the lock lever
51 rotates clockwise against the restoring force of the urging spring 52, and its engaging portion 55 is disengaged from the engaging stepped portion 49 and is held as shown by the solid line in FIG. When the slide plate 39 is unlocked, the slide plate 39 slides upward by the restoring force of the biasing spring 44. Therefore, the push-up pin 45 passes through the through hole 45h, projects upward, and comes into contact with the bottom portion 21a of the engaging member 21 in the film winding section 4 of the cassette body 1. At this time, the engagement member set 21 is urged downward by the compression spring 33, but is pushed up by the restoring force of the urging spring 44, which is stronger than the spring force of the compression spring 33, so the engagement member assembly 21 is pushed up by the push-up pin 45.
1 rises, and the engaging claw portion 26 of the engaging member 21 engages with the claw portion 47 of the film winding shaft 46. Therefore, one rotation of the film winding shaft 46 is transmitted to the engaging portions 62 through the engaging claw portion 26 that engages with the claw portion 47 L-7 engaging portions i, J2
The same rotational illusion of z: In order to transmit it to the film winding member 22 via the protrusion 29 and the engagement m30',
The inner film 5 can be wound up by the film winding member 22.

Further, when photographing is completed and the cassette body 1 is to be taken out from the camera body 6, the opening/closing lid 9 of the camera body 6 is first fully unlocked. Next, the slide plate 39 is slid downward against the restoring force of the biasing spring 44 by an appropriate means.

As a result, the push-up pin 45 is also lowered, and the engaging portion vf2 of the cassette body I is lowered by the restoring force of the compression spring 28, and the engaging claw portion 26 is moved to the claw portion 4 of the film winding shaft 46.
It's off from 7. The upper end of the rotating shaft 25 of the engaging portion vf2 serves as the film winding member 22 and the lid 15. Therefore, when the opening/closing lid 9 is opened using its pivot shaft 37 as a fulcrum, the lock lever 51 is rotated counterclockwise VC by the restoring force of the biasing spring 52, and its engaging portion 55 engages with the engaging step portion 49. match. Then, the slide plate 39 is locked in the downward position, and the cassette body 1 can be taken out rearward from the cassette storage chamber 7.

In this way, when attaching and detaching the cassette main body screw to and from the camera body 6, the cassette main body screw can be attached and detached from the rear of the camera body 6 without moving the film winding shaft 46 up and down as in the conventional case, and after loading, the opening/closing lid 9 can be simply closed. As the sliding plate 39 interlocks with the opening/closing lid 9, the engaging pawl 26 of the film winding section 4 can be automatically engaged with the pawl 47 of the film winding shaft 46.

In the above-mentioned embodiment, as an engagement means for transmitting the rotation of the engagement member 21 to the film winding member 22, the protrusion 29 is provided on the rotating shaft 25, and the fitting hole 22m is fitted into the rotating shaft 25.
Although the engagement groove 30 is provided in the embodiment so that the protrusion 29 and the engagement groove 30 are fully engaged, the present invention is not limited to the above embodiment.
It may be configured as shown in FIG. 8 or 9. That is, what is shown in FIG. 8 is a film winding member 22.
A through hole 56 is bored along the axial direction in the eccentric portion of the engaging member 2, and a rod-shaped body 57 is protruded from the engaging member 2 to be inserted into the through hole 56 so as to be movable in the thrust direction. Further, FIG. 9 shows that the rotating shaft 25 of the engaging member 21 is an elliptical non-circular column part 58, and the fitting hole 22m of the film winding member 22 is a non-circular hole part that fits into the non-circular column part 28. *9. Although not shown, the rotating shaft 25 and the fitting hole 22a
may be engaged by spline.

As explained above, the present invention includes a spool that constitutes a film winding section, which is formed by an entire film winding member and an engaging member, and this engaging member is engaged with a film winding shaft of a camera, and the engagement member is Since the members are configured to be movable in the thrust direction (7), the film cassette can be easily attached to and removed from the camera without moving the film winding shaft up and down.Therefore, the structure of the film cassette is simplified and miniaturization is possible. This has the effect of simplifying the structure of the camera and making it more compact.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of the present invention, all of which are not shown. Figure 1 is a plan view of a film cassette, Figure 2 is a front view, and Figure 3 is a part of an endoscope camera. Notched back mJ
4 is a side view, FIG. 5 is a longitudinal sectional front view of the film winding section, FIG. 6 is a perspective view of the spool, and FIG. 7 is a partially cutaway longitudinal sectional side view showing the internal structure of the camera. FIGS. 8 and 9 are perspective views showing different embodiments of the spool. 2... Bridge, 3... Film supply section, 4...
Film winding section, 2θ... spool, 2)... engaging member, 22... film winding member, 46... Fill/N winding shaft, 29... projection, 3o... Engagement part, 56... Through hole, 57... Rod-shaped body, 58... Non-circular column part, 59... Non-circular hole part. Applicant's agent Patent attorney Suzu note Takehiko 3.9 1
Figure 3 Figure 4 Figure 5 Figure 6 Figure 8 Whistle 9 Figure 7 Figure 7 735 Continued from page 1 72 Inventor Hisao Ogyu,
72, 2-43-2 Hatagaya, Shibuya-ku, Tokyo, 7z, Lymphus Optical Industry Co., Ltd., Inventor: Sei Kobayashi,
, 71 2-43-2 Hatagaya, Shibuya-ku, Tokyo Lymphus Optical Industry Co., Ltd., 72 Inventor Ryo Ono-, 7 2-43-2 Hatagaya, Shibuya-ku, Tokyo Lymphus Optical Industry Co., Ltd. (7g) Inventor Masato Toda,
7 2-13-2 Hatagaya, Shibuya-ku, Tokyo, 13-2, within Lymphus Optical Industry Co., Ltd. (7 Power Inventor: Takamasa Hosoya, 2-chome, Hatagaya, Shibuya-ku, Tokyo, 13-2, within Lymphus Optical Industry Co., Ltd.) Inventor Kawaaki Nakamura, 2-43-2 Hatagaya, Shibuya-ku, Tokyo, within Lymphus Optical Industry Co., Ltd. Inventor: Tadao Hagino, 2-chome Hatagaya, Shibuya-ku, Tokyo, 143-2, Lymphus Optical Industry Co., Ltd. 2) Inventor: Masaaki Hayashi, 2-43-2, Hatagaya, Shibuya-ku, Tokyo, within Lymphus Optical Industry Co., Ltd. 2 Inventor: Akifumi Ishikawa, 2-43-2, Hatagaya, Shibuya-ku, Tokyo, within Lymphus Optical Industry Co., Ltd.

Claims (4)

[Claims] (1) In a film cassette in which a film supply section and a film winding section are formed by connecting the entire bridge, the spool constituting the film winding section engages with the film winding member of the camera and the film winding shaft of the camera. An engaging member that is movable in the thrust direction forms a C, and the entire rotational force of this engaging member is transmitted to the film winding section H through the engaging means to wind up the film, and the engaging member A film cassette characterized in that the outer diameter of part H is the same as or smaller than the kefilm winding member. (2) The engaging means comprises a protrusion provided in the axial direction of the engagement member and an engaging portion provided on the film winding member and engaged with the protrusion. Film cassette of range No. 1 Hegeki. (3) The engaging means is made up of a through hole that is axially bored in the eccentric part of the engaging member and a film winding part (a rod-like body that is protruded from the center and pushed into the through hole). Featured patent bread
A film cassette according to item 1 of the scope of demand. (4) A patent claim characterized in that the engaging means is composed of a non-circular column provided on the engagement member and a non-circular hole provided on the film winding member and fitted into the non-circular column. A film cassette according to item 1.