JPS59146036A - Film cassette - Google Patents

Abstract

PURPOSE:To easily load and unload a film cassette by providing an internal cylinder which is movable in a thrust direction in order to engage the cylinder with the film winding shaft of a camera, and transmitting its rotating force to an external cylinder for taking up a film through a gear mechanism. CONSTITUTION:When an opening/closing cover 9 is closed after a cassette body 1 is loaded, a lock lever 51 rotates clockwise, and a slide plate 39 is unlocked to slide upward by the restoring force of an energizing spring 44. Then, a press-up pin 45 moves up by the restoring force to abut on the internal cylinder 21 at the film take-up part 4 of the cassette body 1. Consequently, the internal cylinder 21 moves up and the engagement pawl part 24 of the internal cylinder 21 engages with the pawl part 47 of the film winding shaft 46. Therefore, the rotation of the film winding shaft 46 is transmitted to the internal cylinder 21 through pawl parts 47 and 24 and the rotation of the internal cylinder 21 is transmitted to the external cylinder 22 through the gear mechanism 27 consisting of an external gear 25 and an internal gear 26 to take up a film 5.

Description

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

An endoscope film cassette consists of a film storage section and a film winding section with a bridge in between. A spool for winding the film is rotatably housed in the film winding portion of the film cassette, and an engaging claw integral 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 on the back side of the camera body, which can be opened and closed fully to load the film cassette into the cassette storage chamber inside the camera body. There is.

In this case, since the film is loaded into the cassette storage chamber by sliding from the back of the camera body in the optical axis direction, there is no interference between the film winding shaft on the camera side and the film cassette during loading. In order to avoid this, the film winding shaft described in - is made vertically movable, and when loading a film cassette, the film winding shaft is fully retracted upwards, and after loading,
F is configured to be lowered and engaged with an engaging claw of a film cassette.

However, the film lawmaker's offer money-)-10j influential
The disadvantage of using an iJ function is that the height of the camera body becomes smaller by the stroke, and the mechanism becomes more complicated. If the film cassette does not come out, it is necessary to remove the film cassette while retracting the film winding shaft upward, which makes it troublesome to attach and detach the film cassette.

This invention was made in view of the above circumstances, and its object is to connect a spool constituting a film winding section to an outer cylinder for film winding, an inner cylinder that engages with a film winding shaft of a camera, and an inner cylinder that engages with a film winding shaft of a camera. The rotational force of the inner cylinder is transmitted to the outer cylinder via a gear mechanism, and the inner cylinder is movable in the thrust direction, making it easy to attach and remove the film cassette from the camera. The purpose of this invention is to provide a film cassette that can be used in various ways.

The present invention will be described below based on an embodiment shown in the drawings. Figures 1 and 2 show a film cassette for an internal mirror, and 1 is the cassette body. The cassette body 1 is composed of a film supply section 3 and a film winding section 4 with a bridge 2 in between. In this film supply section 3, an unexposed film 5 of, for example, 8M or 16 mm is wound (or stored), and one end thereof is connected to a spool 20, which will be described later, of the film winding section 4.

Figures 3 and 4 show an endoscope camera.
is the camera body. Inside the camera body 6 is provided a cassette storage chamber 7 into which the cassette body 1 is loaded. An opening/closing lid 9 for opening and closing the opening section 8 of the cassette storage chamber 7 is pivotally mounted on the back side of the camera body 6.

The opening/closing lid 9 is opened and the cassette main body 1 is slid from the rear of the camera main body 6 in the direction of its optical axis to be loaded into the cassette storage chamber 7.

Next, regarding the cassette main body 1, see FIGS. 2 and 5.
This will be explained in detail based on FIG.

10 is an F section case, and 11 is an upper case.

A first cylindrical section 12 forming the film supply section 3 and a second cylindrical section 13 forming the film winding section 4 are integrally molded with the bridge 2 on the lower case 1θ. In addition, in the above case 11, "= first and second
A lid body 1 that closes the cylindrical portion 12゜13' opening on two sides 1]
4 and 15 are provided. Further, an opening 16 is provided in the 1-degree portion of the second cylindrical portion I3, and this opening 1
A guide portion 17 that protrudes upward is provided on the edge of the opening 6 . Further, the lid body 15 is also provided with an opening I8 facing the above-mentioned space 1'' portion 16, and a guide portion 19 projecting downward is provided at the opening edge of the opening I8. These guide parts 17.19 are eccentric with respect to the opening part 16.18, and between these guide parts 17.19 there is a spool 2θ
are rotatably fitted. The spool 20 is composed of an inner cylinder 21 and an outer cylinder 22, and the cylinder 2 is rotatably fitted into openings 16 and 18 provided at the upper and lower parts. It is rotatably fitted into the provided guide portion 17,19. Therefore, the inner cylinder 21 and the outer cylinder 2
2 is eccentric. A bottom portion 23 of the inner tube 21 protrudes from the opening 16, and an engaging claw portion 24 extending from the opening 18 is provided at the upper portion thereof. Furthermore, wide external teeth 25 are provided in the axial direction on the outer circumferential surface of the weight 2I, and external teeth 25 are provided on the inner circumferential surface of the outer cylinder 22.
Narrower internal teeth 26 are provided. The outer teeth 25 and the inner teeth 26 are engaged at a part of the circumference to form a gear mechanism 27, and the inner cylinder 21 can move in the thrust direction with respect to the outer cylinder 22. The rotational force of the inner cylinder 21 is transmitted to the outer cylinder 22, and the film 5 can be wrapped around the outer peripheral surface of the outer cylinder 22. Therefore, the outer periphery of the outer tube 22 is formed into a film storage chamber 28 . Roughly speaking, a flange 29 is formed on the outer circumferential wall of the upper end of the inner cylinder 21, and a compression spring 3o is interposed between the flange 29 and the surface of the lid 15.
71m21Yc VC is always biased in the F direction, that is, in the direction in which the engaging claw portion 24 is recessed into the opening J8 or r). To be careful, the upper surface of the cylinder 2 is held by the outer cylinder 22 and the h-body I5.

Next, the camera body 6 will be described in detail with reference to FIG. That is, 34 is a support member provided in the cassette storage chamber 7, and this 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
It is spaced apart from the bottom 35 of the
is pivoted. The lower end of the opening/closing lid 9 is pivotally attached to this pivot shaft 37, so that the opening 8 of the cassette storage chamber 7 can be opened and closed. In addition, the support member 3
Support walls 38 and 38 are bent at both ends of the cassette storage chamber 7 and extend along both sides of the cassette storage chamber 7.
A slide plate 39 is provided on the side of one of the support walls 38 (ie, the cassette main body) facing the film winding section 4 . This slide plate 39 is formed in a 7-shape, with its vertical plate 40 facing the outer surface of the support wall 38, and its horizontal plate 4) facing the lower part of the support part #A34. Further, elongated holes 42° 42 in the vertical direction are pressed into the vertical plate 40 of the slide plate 39, and these elongated holes 42'r 42 are connected to the bins 4, ? , 43 have been inserted. Therefore, the slide plate 39 is supported by the pins 43, 43 that engage with the elongated holes 42, 42 so as to be able to slide upwardly and downwardly, and is constantly urged upward by the urging spring 44. Further, a push-up pin 45 is protruded on the horizontal plate 41 of the slide plate 39, and a support portion F]3 facing the push-up pin 45 is provided.
4 is provided with a through hole 45a. The push-up bottle 45 is a supporting member, and is rotated against the inner cylinder 21 of the 74114 winding part 4 of the cassette body 1 loaded into the soil, and is brought into contact with the bottom part 23 of the slide plate 39 at its arm. The cylinder 21 can be pushed against the restoring force of the spring 30. In other words, the inner part n-1' 21 of the spool 20 can be pushed up against the claw part 47 of the film winding shaft 46 provided at the upper part of the cassette storage chamber 7, and the engaging claw part 24 can be engaged with it. .

In addition, a notch 48 at O in the vertical plate 4θ of the slide plate 39 is provided.
An engaging stepped portion 49 is formed at the end of the cutout portion 48 . Further, a lock lever 51 is pivotally supported on the support wall 38 facing the notch 48 and is rotatable about the bin 50, and is biased counterclockwise by a biasing spring 52. At the two ends of the σ lever 51, there is a suppressing portion 53 protruding from the back surface of the opening/closing lid 9.
An operating part 54 is provided opposite to the engaging part 54, and an engaging part 55 which can be freely engaged and disengaged from the engaging step part 49 is provided at the lower end thereof. This lock lever 51 responds to the opening/closing lid 9, and when opened, is rotated counterclockwise by the Φ side of the biasing spring 52 so that the engaging portion 55 engages with the engaging stepped portion 49 and slides. Board 3
9 is locked in the lowered position, and when it is closed, the suppressing part 53 presses the acting part 54 and rotates it clockwise to open the engaging part 55.
The lock is released by retracting from the engagement step portion 49.

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 2 of the camera body 6 is open, the lock lever 51 is moved by the biasing spring 52 as shown by the two-dot chain line in FIG.
It rotates counterclockwise due to the restoring force. Therefore, the engaging portion 55 engages with the engaging stepped portion 49 of the slide plate 39, and holds the slide plate 39'iF in the yielded state.

In this state, when the cassette body 1 is inserted into the cassette storage chamber 7 of the camera body 6 from the rear blade in the optical axis direction, the cassette body 1 is placed on the supporting member 34 of the cassette storage chamber 7. 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 against the suppressing portion 53 of the opening/closing lid 9. Therefore, the lock lever 51 is
The engaging portion 55 rotates clockwise against the restoring force of 2.
is disengaged from the engaging stepped portion 49 and is no longer held as shown by the caustic line in FIG. When the lock of the slide plate 39 is released,
The slide plate 39 slides upward by the restoring force of the biasing spring 44. Therefore, the push-up bottle 45
The inner clasp 121 is pushed downward by the compression spring 30. The force is biased at f, but due to the multiple jG force of the biasing spring 44, which is stronger than the spring force of this iE rice spring 30, -C is pressed L2
Raise it a) j'C Meshi L7-1-gebin 45t/koyo1) and inner ja2z is soil 1Or1-1. , inner cylinder 2J (
/l) Engaging claw part 24 film winding 4"tl+4t
engages with the claw portion 47 of; j7 Therefore, the film winding shaft 460 rotates completely through the engaging claw portion 24 that engages with the claw portion 47. The inner cylinder 21 V is transmitted, and the rotation of the inner cylinder 21, the external teeth 25, the internal teeth 26,
In order to transmit the film to the outer cylinder 22, the film is wound up using the film supply bar ((film 5 in 3 is transferred to the outer cylinder 22) and becomes i+J function.

Also, the shooting has been completed and the cassette itself! All camera bodies 6 or 1) (To remove the screw, first open the camera body 6 (
Release the lock L1- of the lever 9. Next, apply the force of the biasing spring 44 to the C slide 41 and slide it downward.

As a result, the push-up bin 45 also descends, and
Z 2 i Ir, 1 pressure ThC 1) in main body 1 30
However, due to the force of
- Outside the claw portion 47 of the lifting shaft 46 i, b, etc.
7℃, (Np 21'7) Above! 'Ai: outside%j
22 M, J:, and 15 and 1j+i −.

Therefore, when fj14 closing lid 9 (- pivot shaft 37 including two fulcrums and
-B.1 depending on the direction of the spring 52 (CC10; f)
rat once (・(8 times ΦJ1, the engaging part 55 engages with the engaging step part 49, 3, (7 Tagatsu-C, slide slide plate, 39 p,), and then put it in the lowered state. The cassette body 1 can be removed from the cartridge storage chamber 7 to the rear without coming out.

In this way, the cassette body 6 is connected to the camera body 6.
Literally (l operation (when j ~, ?) r like a button, move the noilm winding shaft 46''; f move it up and down, t, r, With the medicine that closes 9, this open eye 1 lid 9 and i!1! WJJ
By means of the slide of the slide plate 39, the engaging claw portion 24 of the pick-up portion 4 can be automatically engaged with the claw ii1≦47 of the winding shaft 46 of the film 11 (Z).

In the upper Mi mini example, the -C outer cylinder 22 is provided at 11 centers for the inward 21 fc, and the outer pipe 26 and the inner teeth 2
However, the present invention is not limited to the embodiment described above, but may be constructed as shown in FIG. 8. That is, J22 is provided concentrically on the inner cylinder 2 and the outer f, and both ends of the two lower ends are rotatably supported on the main body I. A planetary gear 56 is made of Au between the cylinder 22 and the planetary gear 56 is meshed with the external teeth 25 of the cylinder 2 and the internal teeth 26 of the outer cylinder 22.

As explained above, this invention moves the spool to the film winding cylinder and the fc where the film winding shaft of the camera and the film winding axis of the camera are connected. Because it has a prominent inner cylinder and a gear mechanism that transmits the rotational force of this inner cylinder to the outer cylinder,
When the film cartridge is attached to and removed from the camera, the film can be wound easily without moving the shaft. However, the structure of the camera side has been simplified and miniaturized, and it has the effect of being able to be moved internally by the gear mechanism) or f゛).・I'm going to tell you the story of the murky fish □, so I'm going to turn the teeth AItt into 7 and 11 on the camera side! Even if the winding speed of 'lli is constant, one roll of film [11 is "J"]
'I'll do it. 1. ,,7”LT.

Once upon a time, an endoscope or an insulator camera (/(- means the screen “
C, which is of a different size, also f-knees the size, and the piece-offering bituna comes! 11 seedlings were made, Fillem Valley... self-crossing θi/
(m'; flJ month) also has the effect of coming.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of the present invention. Figure 1 is a plan view of a film cartridge, and Figure 2 is the same.
Figures 1, 3 and 3 show a partially cut-out endoscope camera. X view, (Fig. 84, side view, 5th
The figure is a longitudinal sectional front view of the film winding section, and Figure 36 is the 5th section.
Figure 7 is a curved view taken along the line Vl--Vl, Figure 7 is a partially cut-away elongated T section at++ view, and Figure 8 is a view showing the internal structure of the camera. 11 is a partially cutaway front view showing an example of pond G)′-hi+□. 2... Bridge, 3... Film supply section, 4...
Film winding section, 20...spool, ? 1 Yamauchiura,
22...Outer h127...Toothless machine cup, 4G...Film winding -F-ge φ+. Out 19 white agent patent attorney Suzu? J, Hiko Dai 1
Figure S Figure 2 1t, 15 +' n
To IC. 3 Bow) No. 3x 7 46 π4x Tsunin 5 Figure 31617 No. 6 Partner: Takeshi Okada @2-43-2 Hatagaya, Shibuya-ku, Tokyo Lymphus Optical Co., Ltd. Inventor Atsushi Q. From: 2-43-2 Hatagaya, Shibuya-ku, Tokyo Lymphus Optical Within Kogyo Co., Ltd. (7■ Inventor Hisao Ogyu □,
7z Originated from 2-43-2, Hatagaya, Shibuya-ku, Tokyo; Inventor: Akira Takano; 2-43-2, Hatagaya, Shibuya-ku, Tokyo; 2-43-2, Lymphus Optical Industry Co., Ltd., 270- Akira: Kaiaki Nakamura 2-43-2 Hatagaya, Shibuya-ku, Tokyo Tadao Hagino 2-43-2 Hatagaya, Shibuya-ku, Tokyo Naiaki Linpus Optical Industry Co., Ltd. Masaaki Hayashi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Chome 43-2 Olympus Optical Industry Co., Ltd. Akifumi Ishikawa Address: 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industry Co., Ltd.

Claims (1)

[Claims] In a film cassette in which a film supply section and a film winding section are formed with a bridge in between, the spool constituting the film winding section is connected to the film winding J (the outer cylinder for forging, the camera fillet, the winding shaft, and the film winding section). A film cassette comprising a cylinder movable in the thrust direction for engagement, and a toothed mechanism that transmits the rotational force of the inner cylinder to the outer cylinder.