JPH036895Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to a film information reading device for a camera that reads film information such as film sensitivity from a film information section provided on the outer peripheral surface of a cartridge.

(Background of the invention) Conventionally, cartridges have been considered that have a film information section formed of either a metal surface or an insulating surface on the outer peripheral surface to indicate film sensitivity, latitude, number of films, etc.

On the other hand, in a type of camera in which the rewind shaft protruding into the cassette chamber of the camera cannot be retracted from the cassette chamber, in order to load the cassette into the cassette chamber so that the cassette shaft fits into the rewind shaft that protrudes from the cassette chamber, it is necessary to It must be placed at an angle to the cartridge chamber and slid into the cartridge chamber.

In this type of camera, for example, a cartridge in which a plurality of film information sections are arranged on the outer peripheral surface in the direction of the cartridge axis is used as the cartridge, and when the cartridge is loaded into the cartridge chamber, the camera side When trying to obtain a film information reading device that detects film information on the camera side by contacting a plurality of film information parts with a contact plate provided in the film information section, when tilting the cartridge with respect to the cartridge chamber and inserting Since the tip corner of the cartridge gets stuck on the contact plate, not only can the cartridge not be loaded smoothly, but the contact plate may be damaged. If we try to give the contact plate enough elasticity to prevent the cartridge from getting stuck, the contact plate will become larger. There is a problem in that the number of pieces of film information that can be detected decreases as a result.

Furthermore, when the base of the contact plate is fixed to the back side of the chamber wall of the cartridge chamber, and the contact portion of the contact plate is made to protrude into the cartridge chamber through an opening provided in the chamber wall, the opening is large. If it wears out, problems may occur such as light leakage from the opening or a decrease in the strength of the chamber wall.

(Purpose of the invention) The present invention was developed by focusing on these problems.Even if the camera is of a type in which the rewind shaft protruding into the cartridge chamber cannot be removed from the cartridge chamber, the cartridge cannot be removed from the contact plate. Camera film information reading allows the cartridge to be loaded smoothly into the cartridge chamber without getting stuck, the space occupied by one contact piece in the cartridge chamber is small, and many contact pieces can be arranged in a row in the direction of the cartridge axis. The purpose is to provide equipment.

(Structure of the invention) In order to achieve the above object, in the present invention, when the cartridge is loaded into the cartridge chamber of the camera, a plurality of film information sections are arranged on the outer peripheral surface of the cartridge in the direction of the cartridge axis. A film information reading device that detects film information on the camera side by contacting a contact plate provided on the camera side, wherein each base of the contact plate is fixed on the back side of the chamber wall of the cartridge chamber, and the base At least one contact piece extending from each of the film information portions to be in pressure contact with the film information portion, each contact piece being in contact with the corresponding film information portion through an opening provided in a wall of the cartridge chamber. A film information reading device for a camera, characterized in that each of the contact pieces is formed protruding within the cartridge chamber, and each of the contact pieces is arranged diagonally with respect to the cartridge shaft and arranged in a row in the cartridge axis direction. Since each of the contact pieces is arranged in a row in the direction of the cartridge axis and diagonally to the axis,
The span of each contact piece can be made long, and each contact piece can have sufficient elasticity. As a result, the cartridge does not get caught on the contact piece when loading, and one contact piece occupies the inside of the cartridge chamber. The space is reduced and a large number of contact pieces can be arranged in a row in the direction of the cartridge axis.

Further, in the present invention, in the film information reading device according to claim 1 of the utility model registration, the opening portion is arranged in a plurality of small portions arranged in a row in the direction of the cartridge shaft in correspondence with each of the contact pieces. It is characterized by being formed of openings, each of the small openings having a parallelogram shape, and arranged so that the positions of the upper and lower sides of each of the small openings in the direction orthogonal to the cartridge axis almost coincide with each other. In the film information reading device for a camera, the opening is formed by each of the small openings to prevent light leakage and to increase the strength of the chamber wall of the cartridge chamber.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

Figures 1 to 5 show an embodiment of the present invention. Figure 1 is a perspective view of the contact plate, Figure 2 is a plan view of the contact plate, and Figure 3 is a state with the back cover removed. FIG. 3 is a rear view of the camera.

As shown in FIGS. 1 to 5, on the outer circumferential surface 10 of the cartridge 1, a plurality of metal or insulating surfaces are formed to indicate film information such as film sensitivity, latitude, number of films, etc. Film information sections 11-14 are provided.

An information detection section of a film information reading device that contacts the film information sections 11 to 14 to detect film information such as film sensitivity on the camera side is constituted by contact plates 21 to 24.

The contact plates 21 to 24 are connected to the film information sections 11 to 1.
4, and each contact plate 21 to 2 is provided in the same number as 4.
The base portions 21a to 24a of 4 are fixed to a back side 40a of a chamber wall 40 of a cartridge chamber 4 formed within the camera body 3.

This chamber wall 40 has a parallelogram-shaped small opening 41.
44 are arranged in a row in the direction of the cartridge axis 1a of the cartridge 1, and the positions of their upper and lower sides in the direction orthogonal to the cartridge axis (horizontal direction in the figure) are set to almost match.

Each base 21a to 24a of the contact plates 21 to 24 is
They are fixed to the back side 40a of the chamber wall 40 in a mutually insulated state, and are connected to an electric circuit (not shown) by electric wires 51 to 54.

Each base 21a to 24a has a film information section 11.
A pair of contact pieces 21b, 21b that press against ~14~
24b, 24b extend obliquely to each base 21a to 24a. Each contact piece 21b to 24b
As shown in FIGS. 3 to 5, each small opening 41
The contact portion 21c protrudes into the cartridge chamber 4 through 44 and is located at the center of each contact piece 21b to 24b.
Each of the contact pieces 21b to 24b is formed into a semi-cylindrical shape with its axis perpendicular to the cartridge axis, as shown in FIG. 4, so that the contact pieces 24c contact the corresponding film information sections 11 to 14 has been done.

Further, each of the contact pieces 21b to 24b is arranged in a row in the direction of the cartridge shaft 1a, diagonally with respect to the cartridge shaft 1a.

Further, a rewinding shaft 45 that can be fitted with the cartridge shaft 1a is fixed to the chamber wall 40 of the cartridge chamber 4, and the tip of the rewinding shaft 45
protrudes inward. In this embodiment, this rewinding shaft 4
5 is fixed so as not to be retractable, and as shown in FIG. 4, a part of the cartridge 1 is formed with an opening that can be inserted by moving in the axial direction at an angle. This opening may be formed by opening only the shaft end face of the cartridge chamber 4.

Each of the small openings 41 to 44 is connected to the cartridge shaft 1a.
The openings are formed to have the minimum necessary size in accordance with the inclination of each contact piece 21b to 24b relative to the opening.

The action will be explained below.

Patrone 1 is placed in the cartridge chamber 4 of the camera body 3.
When loading the cartridge, since the unwinding shaft 45 cannot be retracted from the cartridge chamber 4, the cartridge 1 is tilted relative to the cartridge chamber 4 and placed into the cartridge chamber 4, as shown in FIG. At that time, Patrone 1
As shown in FIG. The cartridge 1 will not be hit by the contact piece 22b. Furthermore, loading of the cartridge 1 is completed by pushing the cartridge 1 forward in the direction of the arrow in FIG. 4 and fitting the cartridge shaft 1a to the rewinding shaft 45.

FIG. 5 shows a state in which the cartridge 1 is loaded into the cartridge chamber 4 in this manner.

As shown in FIG. 5, when the cartridge 1 is loaded in the cartridge chamber 4, each contact plate 21
-24 contact pieces 21b-24b are in pressure contact with the corresponding film information portions 11-14 at contact portions 21c-24c due to their own elasticity. In each of the contact plates 21 to 24, a pair of contact pieces 21b, 21b to 24c, and 24c are in pressure contact with the corresponding film information sections 11 to 14 at the same time, and any one of the pair of contact pieces 21b, 21b to 24c, and 24c The film information signal obtained from one or both of the bases 21a to 24a and each electric wire 51
~54 to the electrical circuit.

In addition, according to the above embodiment, each contact plate 21 to 2
The film information section 1 is attached to each base 21a to 24a of the
A pair of contact pieces 21b, 21b that press into contact with 1 to 14
Since the contact pieces 24b and 24b are extended, at least one of the pair of contact pieces 21b and 21b to 24b and 24b comes into contact with the corresponding film information section 11 to 14, thereby preventing poor contact with the film information section 11 to 14. Thus, reliable conduction of the film information sections 11 to 14 can be obtained.

Note that the shape of the opening that allows each of the contact pieces 21b to 24b to protrude into the cartridge chamber 4 is not limited to the parallelogram-shaped small openings 41 to 44.

Furthermore, in the above embodiment, each of the contact pieces 21b to 2
4b is formed into a semi-cylindrical shape, but each contact piece 21b
The shape of 24b is not limited to a semi-cylindrical shape, but may be any three-dimensional shape that allows the cartridge to be loaded smoothly without getting stuck. Further, the base of the contact plate may be fixed at an appropriate position on the back side of the wall of the patrone chamber, and at least one contact piece may extend diagonally on each contact plate.

(Effect of the invention) According to the film information reading device for a camera according to the invention, at least one contact piece of each contact plate is arranged in a row in the direction of the cartridge axis and diagonally with respect to the cartridge axis. As a result, the span of each contact piece can be made long and each contact piece can have sufficient elasticity.As a result, the rewind shaft protruding into the cassette chamber cannot be retracted from the cassette chamber. Even if the cartridge is loaded, the cartridge can be loaded smoothly without getting caught on the contact piece, and the space occupied by one contact piece in the cartridge chamber is reduced, and many contact pieces can be arranged in a row in the direction of the cartridge axis. can.
In particular, according to this embodiment, as shown in FIG. 2, adjacent contact pieces share the space H in the axial direction of the cartridge, so that the length of the entire contact piece in the axial direction of the cartridge can be further reduced.

Furthermore, according to the film information reading device according to the embodiment of the present invention, a plurality of openings are arranged in a row in the direction of the cartridge axis and correspond to each contact piece, allowing each contact piece to protrude into the cartridge chamber. Each small opening is formed into a parallelogram shape that matches the inclination of each contact piece, and the positions of the upper and lower sides in the direction orthogonal to the cartridge axis are matched. , each small opening can be kept to the minimum necessary size, preventing light leakage, and
Width W of narrow spaces between adjacent small openings
As a result, the strength of the chamber wall can be increased, and in the case of mold forming, the flow of the molten metal is improved and the molding accuracy is improved.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention. Figure 1 is a perspective view of the contact plate, Figure 2 is a plan view of the contact plate, and Figure 3 shows the state with the back cover removed. 4 is a cross-sectional view showing a state in which the cartridge is being loaded, and FIG. 5 is a cross-sectional view showing a state in which the cartridge has been completely loaded. 1...Patrone, 1a...Patrone axis, 4
...Patrone chamber, 10...Patrone outer circumferential surface, 11-14...Film information section, 21-24
...Contact plate, 21a-24a...Base, 21b-
24b... Contact piece, 40... Chamber wall of patrone chamber, 40a... Back side of chamber wall, 41-44... Small opening (opening).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) When the cartridge is loaded into the cartridge chamber of the camera, a plurality of film information sections arranged on the outer peripheral surface of the cartridge in the direction of the cartridge axis are provided on the camera side. A film information reading device that detects film information on a camera side by contacting a contact plate, wherein each base of the contact plate is fixed on the back side of the chamber wall of the cartridge chamber, and the film is read from each of the bases. At least one contact piece that presses against the information area is extended, and each contact piece is inserted into the cartridge chamber so that it contacts the corresponding film information area through an opening formed in the chamber wall of the cartridge chamber. 1. A film information reading device for a camera, characterized in that contact pieces are formed in a protruding manner, and each of the contact pieces is arranged diagonally with respect to the cartridge shaft and arranged in rows in the cartridge axis direction. (2) In the film information reading device according to claim 1 of the utility model registration claim, the opening portion is
It is formed of a plurality of small openings arranged in a row in the direction of the cartridge axis in correspondence with each of the contact pieces, and each of the small openings has a parallelogram shape, and an upper side and a lower side of each of the small openings. A film information reading device for a camera, characterized in that the film information reading device for a camera is arranged such that the positions thereof in a direction orthogonal to the cartridge axis substantially coincide with each other.