JPH0567213B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a film cassette for an endoscope.

[Prior art and its problems]

Conventionally, a film cassette used in an endoscope, as disclosed in Japanese Patent Application Laid-Open No. 146038/1982, consists of a first member for winding and driving the film and a second member for winding the film.

However, the film winding structure composed of two members as described above has the problem that the construction process is complicated and the cost is high.

[Means for Solving the Problems and Their Effects] In order to solve the above problems, the present invention eliminates the conventional second member for winding the film and provides a film winding drive that directly drives the film winding. A film 4 attached to a film attachment plate 2 is wound around a tube 1 and driven.

To explain the structure of the film cassette of the present invention in more detail, the film 4 is attached to the film mounting plate 2.
, a pin hole located at a distance l from the edge of the film.
Installed in 4h. This distance l is set to be somewhat larger than the outer circumference of the film winding drive barrel 1, and as a result, when the film 4 is wound onto the film winding drive barrel 1, the first winding film portion is A cylindrical portion c is formed with a gap s between the take-up cylinder 1 and the cylinder 1 .

In this way, the first round of the film forms a cylindrical part c, around which the film 4 is laminated and wound, so that the conventional second member for winding the film is omitted. can do.

[Explanation of Examples]

Examples of the film cassette of the present invention will be described below.

First, each member shown in the drawings will be explained.

1: A sliding groove 1a in which the sliding convex portion 2b of the film mounting plate 2 slides is formed in the winding drive cylinder of the film 4. Film 4 is at a distance l from the film edge.
At this position, the film mounting plate 2 is fixed and the film is wound onto the film winding drive cylinder 1.

Furthermore, driven teeth 1b are provided on the end surface of the film winding drive cylinder 1.

2: A film mounting plate on which the film 4 is mounted by inserting the fixing pin 3 into the pin hole 4h located at a distance l from the end of the film as shown in FIG.

In Fig. 3, 2a is the cover plate, 2h is the cover plate 2a
This is a pin hole drilled in the

The film mounting plate 2 has a sliding protrusion 2 on its inner surface.
b is provided in a protruding manner so that the film winding drive cylinder 1 can be slid.

3: A fixing pin that is inserted into the pin hole 4h at the end of the film to attach the film 4 to the film mounting plate 2.

4: Film fixed to the film mounting plate 2 at pin hole 4h.

As described above, the first round portion of the film 4 constitutes the inner cylindrical portion c, and the film winding drive cylinder 1
and a gap s.

5: Drive teeth of the film winding drive tube 1 attached to the endoscope body 7.

6: A pusher that protrudes when the lid 8 of the main body 7 is closed.

7: Endoscope body.

8: Lid.

9: Rewind tube.

As described above, in the film cassette of the present invention, the film winding drive barrel 1 is slidably mounted on the film mounting plate 2. A pin hole 4h is formed in the film 4 at a distance l from the end of the film, and at the position of this pin hole 4h, the film 4
is attached to the film attachment plate 2.

The manufacturing sequence, structure, and operation of the film cassette of the present invention will be described in detail below.

First, insert the pin hole 4h of the film 4 into the fixing pin 3 that is integrated with the film mounting plate 2, and then attach the lid 2.
Insert the fixing pin 3 through the pin hole 2h of a, and attach the film 4 to the film mounting plate 2.

Next, when the sliding convex portion 2b of the film mounting plate 2 is fitted into the sliding groove 1a of the film winding drive tube 1 and the film 4 is wound, the first rotation portion of the film 4 is formed into a cylindrical portion. Configure c. Because pin hole 4
h is bored at a distance l from the film end, and the film end touches the film mounting plate 2, leaving a gap s with respect to the film winding drive cylinder 1 to form a cylindrical part c. It is. Therefore, the distance l is set so that the circular protrusion c is approximately a perfect circle.

The film cassette of the present invention can be obtained by storing the film 4 thus constructed, the film take-up drive tube 1, and the film rewind tube 8 in a film cassette.

When the film cassette of the present invention is inserted into the endoscope body 7 as shown in FIG. 2 and the lid 9 is closed, the pusher 6 protrudes, and the film winding drive tube 1 moves the inside of the film cylindrical portion c to the film mounting plate. It slides while being guided by the body 2, and its driven teeth 1b mesh with the driving teeth 5 of the main body 7.

Note that the cylindrical portion c is a part of the wound film 4.
As the winding progresses, centripetal force acts and the winding does not deviate from its perfectly round shape.

〔Effect of the invention〕

Film 4 attached to film attachment plate 2
The distance l between the pin hole 4h and the end of the film is set to be somewhat larger than the outer diameter of the film winding drive barrel 1, so when the film 4 is wound onto the film winding drive barrel 1, its first rotation The eye portion forms a cylindrical portion c. Therefore, since the remaining film 4 is wound around this cylindrical portion c, there is no need for a conventional winding tube for film winding.

[Brief explanation of the drawing]

Figure 1: A side view of the main parts of the film cassette of the present invention, Figure 2: An explanatory view of the action when the film cassette is inserted into an endoscope, Figure 3: An exploded perspective view of the main parts of the film cassette of the present invention, 1 : Film winding drive tube, 1a: Sliding groove, 1
b: Driven tooth, 2: Film mounting plate, 2a: Cover plate, 2b: Sliding protrusion, 2h: Pin hole, 3: Fixed pin, 4: Film, 4h: Pin hole, 5: Drive tooth,
6: Pusher, 7: Endoscope main body, 8: Rewind tube,
9: lid plate, s: gap, c: cylindrical part.

Claims (1)

[Scope of Claims] 1. A film winding drive tube 1 having driven teeth 1b on its end surface, and a film mounting plate 2 having a film 4 mounted thereon at a pin hole 4h located at a distance l from the end of the film. The film winding drive barrel 1 is slidable on the film mounting plate 2, and the distance l between the pin hole 4h and the film end is set to be larger than the outer circumference of the film winding drive barrel 1. As a result, the film 4 is moved to the film winding drive cylinder 1.
When the film is wound up, the first winding film portion abuts the film mounting plate 2 and forms a cylindrical portion c with a gap S with the film winding driving cylinder 1. A film cassette for an endoscope, characterized in that the distance l is set so that when the cylindrical part c is formed, it is almost a perfect circle.