JPS6148822A - Film pack adapter - Google Patents

Abstract

PURPOSE:To obtain a film pack adapter with universality by mounting a light shield material on a step formed so that its outside peripheral edge is lower than the inside front plate surface about a rectangular boundary line surrounding an opening part formed in a front housing, and fixing the front housing and an adapter plate in a light-tight state. CONSTITUTION:The adapter plate 2 and front housing 1 are fixed in one body so that a surface 25 surrounding an opening part 4 formed in the adapter plate 2 and a surface surrounding an opening part 5 formed in the front housing 1, i.e. front plate 10 abut on each other, constituting the film pack holder. A slot 22 where a dark slide 23 is stored is formed between those two surfaces 25 and 10. This film pack holder fixed in one body is fixed to a camera in the light-tight state by engaging fixed hooks 26 and 27 provided to the adapter plate 2 with the slide 29 of the camera 28. The front plate 10 of the front housing 1 is lower at the outside part about the boundary line 30, forming rectangular step surfaces 10 and 31 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a film pack adapter that can be applied to many types of cameras, and particularly to an adapter equipped with a film pack border using self-developing film.

(Prior Art) In recent years, so-called instant cameras, which use self-developing films that produce prints within a few minutes of exposure and develop the film immediately after taking pictures, have rapidly become popular in recent years. This type of camera requires that the process roller, film pack tabs, and leader shield be aligned with each film pack so that the film in the film pack is properly exposed and processed. cannot be used directly with cameras that use conventional negative film. On the other hand, there has been an increasing demand for the direct use of this type of self-developing film in any camera, but it has been difficult to satisfy this demand for the many regular cameras that use conventional negative film. In order to solve this problem, for example, Japanese Patent Publication No. Sho 5G-37529 proposes a new film pack holder for storing a film pack on which a process roller is depicted. This l! i!
The proposed film pack holder is formed by pivotally connecting a front housing and a rear housing, and has a film pack and a pair of process rolls rotatably attached therein. The front housing is provided with a front plate forming a planar mounting surface and having an opening, and an M) is formed in the front plate at a position surrounding the opening. The flat mounting surface of the front housing is fixed to an adapter plate by screws, and the adapter plate is fixed to the camera. At this time, a U-shaped tab is formed on the adapter plate at a position that aligns with a groove formed around the front plate of the front housing,
This rib and groove are designed to fit together.

According to the film pack holder configured as above,
For any camera, the film pack holder can be attached to a special adapter plate for that camera via a square plate with an opening aligned with the frame opening in the film pack boulder, and the adapter plate can be attached to the camera. , it becomes possible to create shadows using self-phenomenal film.

However, in the film pack holder having the above structure, as a means for fixing the front housing to the adapter plate, a groove is formed at a position surrounding the opening on the surface of the front housing facing the adapter plate, and the groove of the adapter plate is Since a U-shaped tab is formed at a position aligned with the groove, and this U-shaped tab is fitted into the groove, there is a problem that processing is complicated and costs are high. However, there were restrictions on the combinations of film pack holders and adapter plates, and in particular, there were restrictions on the specifications in manufacturing the adapter plates, making it impossible to attach one film pack holder to many types of adapter plates. .

(Object of the Invention) The present invention has been made in view of the above-mentioned circumstances, and is a versatile film pack for self-developing film that is simple in structure, easy to manufacture, low in cost, and has good light shielding properties. The purpose is to provide an adapter.

(Structure of the Invention) The present invention provides an opening formed in the front housing as a means for connecting a film pack holder consisting of a front housing and a rear housing, and an adapter plate for attaching this holder to a camera. A stepped portion is formed on the boundary line of the surrounding rectangle so that the outer peripheral edge is lower than the inner front plate surface, and a light shielding material is attached to this stepped portion to make the front housing and the adapter plate light-tight. It is characterized by being fixed in place.

(Effects of the Invention) According to the present invention, since it is only necessary to slightly cut the peripheral edge of the front housing into a flat shape, the number of machining steps is significantly reduced, and a low-cost film back adapter can be provided. Since the adapter plate is light-tightly fixed to the adapter plate via a light-shielding material, no light can enter into the film pack holder.

<Embodiment of the Invention> Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing a state in which a front housing 1 constituting a film pack holder according to an embodiment of the present invention is attached to an adapter plate 2.

The adapter plate 2 is formed with a surface 3 that engages with a camera (not shown), and has a rectangular opening 4 formed in its center. The front housing 1 also has an opening 5 at a position aligned with the opening 4 of the adapter plate 2.
is formed.

2 is a plan view showing the surface of the adapter plate 2 on the film pack holder side, FIG. 3 is a plan view of the front housing 1 without showing the surface on the adapter plate 2 side, and FIG. 4 is a plan view not shown in FIG. 1. FIG. 5 is a vertical cross-sectional view showing a state in which a film pack boulder including the front housing 1 and the rear housing 6 is mounted on the adapter plate 2, and FIG. 5 is a cross-sectional view thereof. As shown in FIG. 5, a film pack holder formed by a front housing 1 and a rear housing 6 is adapted to accommodate a standard film bag 7. A spring 9 is fixed to the back panel 8 of the rear housing 6, and this spring 9 allows the film pack 7 to be fixed to the front plate 1 of the front housing 1.
It is pressed against the inner surface of o.

The leader extending from the film pack 7 is located in the front housing 1.
A rib 12 integrally formed with the front plate 1o of
and extends downwardly through a slot 11 between a depending portion 13 extending downwardly from this rib 12 and a depending portion 14 of rear housing 6 .

A process roll assembly 15 for processing the exposed film is removably provided within the rear housing 6, and may be formed integrally with the rear housing 6 or may be formed integrally with the rear housing 6.
It is held in the proper position by a spring 17 that engages 6. A pair of process rolls 18, 19 are rotatably supported by side plates 20 forming part of the assembly 5 about parallel axes perpendicular to the plane of the drawing.

Tab 21 projects from film pack 7 and extends between process rolls 18,19. This tab 21 functions to withdraw the exposed film unit from the process rolls 18, 19 and distribute processing fluid throughout the film unit.

As shown in FIG.
A dark slide 23 is formed between the front housing 1 and the front housing 1, and an enlarged portion 24 is formed at one end of the dark slide 23 to facilitate insertion and removal of the dark slide 23. The dark slide 23 can be easily inserted into the dark slide 23 without any special slope provided on the outside of the adapter plate located at the lower part of the insertion opening.

As shown in FIGS. 2 and 3, a surface 25 surrounding the opening 4 formed in the adapter plate 2 and a front housing 1
The film pack holder is configured by surrounding the opening 5 formed in the opening 5, that is, the front plate 10 serves as an abutting surface and is integrally fixed, and between these two surfaces 25 and 10 is the aforementioned dark slide. Slot 22 for storing 23
(See FIGS. 4 and 5) is formed. The film pack holder that is integrally fixed in this manner is configured so that the fixing hooks 26 and 27 provided on the adapter plate 2 are engaged with the slide 29 of the camera 28, as shown in FIG. 2 and FIG. tightly adhered. The front plate 10 of the front housing 1 is lowered on the outside with a boundary line 30 as a boundary, and has a rectangular Flj and four sides 10.
31 is formed.

As shown in FIGS. 2 and 7, a temporary spring 33 with felt is fitted into a slot 32 formed across the front part of the adapter plate 2, and the dark slide 23 is inserted into the slot 32. At this time, the dark slide 23 can block light. As shown in FIG. 4, the other side of the dark slide 23 is shielded from light by attaching a rectangular light shielding material 34 such as felt to the stepped surface 31 surrounding the front plate 1o of the front housing 1. The guides 35° 3G and 37 provided in the front housing 1 have the function of protecting the edge of the light shielding material 34 and guiding the insertion of the dark slide 23.

A plurality of holes 38 are formed in the adapter plate 2, and the holes 39 formed in the front housing 1 are engaged at positions aligned with the holes 38, and the screws 40 are used to connect the front housing 1 and the adapter plate 2. and fix it. The hole 39 formed in the front housing 1 is provided in a boss 42 formed in an inner wall 41 extending from the front plate 10, as shown in FIG. The inner surface of this inner wall 41 comes into contact with the side surface of the film pack 7 and
I am guiding you.

As explained above, according to the present invention, since the adapter plate can be removed from the front plate of the 60-part housing via the light-shielding member on the rectangular surface that is lower than the front plate, it is not necessary to process the full ribs as in the conventional method. There is no need for it, and the cutting allowance for forming the stepped part is small, making processing easier and completely shielding the mounting part from light. Moreover, since the front housing and the adapter plate are attached through surface contact, the film pack holder including the front housing has the advantage of being adaptable to many types of adapters.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the film pack adapter according to the present invention, not showing the state in which the front housing is attached to the adapter plate, and Fig. 2 is a plan view showing the surface of the adapter plate on the film pack holder side. , Figure 3 is a plan view showing the surface of the front housing on the adapter plate side, and Figure 4 shows the front housing and rear housing integrated.
FIG. 5 is a cross-sectional view of FIG. 4, and FIGS. 6 and 7 are exploded perspective views showing the assembled state of this embodiment. . 1...Front housing 2...Adapter plate 6...Rear housing 7...Film pack 1
0...Front plate 18, 19...Process roll 23...Dark slide 30...Boundary line 3
1... Level difference surface 34... Interference
Light Moon Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] Consisting of a front housing and a rear housing,
a film pack holder that houses therein a self-developing film pack and a process roll assembly for processing and developing the film of the film pack; and a film pack holder that is fixed to the film pack holder in order to attach the film pack holder to various types of cameras. In the film pack adapter, a rectangular step is formed around an opening formed in a surface where the front housing is fixed to the adapter plate, and the outside of the step is lower than the inside. At the same time, a light shielding member is provided between an outer surface of the stepped portion and a surface of the adapter plate facing the front housing, and the adapter plate is integrated with the front housing via the light shielding member. A film pack adapter characterized by a light-tight fixation.