JPH0322747Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Industrial Application Field) The present invention relates to a cartridge holding device for holding a cartridge stored in a cartridge storage chamber in a camera using a cartridge type film.

(Prior Art) Generally, in a cartridge-type film, as shown in FIG. 4, a film 3 is wound around a cartridge shaft 2 that passes through the inside of a cylindrical cartridge 1. It has a structure in which it is drawn out from a provided drawer section 4.

In a camera using such a cartridge 1, the structure of the cartridge storage chamber is known, for example, as described in Japanese Utility Model Application Laid-Open No. 56-77827. That is, as shown in FIG. 5, a cartridge storage chamber 6 is provided in the camera body 5, and this cartridge storage chamber 6 is connected to a back cover 7 provided in the camera body 5 so as to be openable and closable.
It is opened and closed by. A spring body 8 for holding the cartridge 1 is provided in the cartridge storage chamber 6, and the base end of the spring body 8 is attached to a side wall 9a on the front side (lower side in FIG. 5) of the cartridge storage chamber 6. Fix it with screws 10, and the tip side is the cartridge storage chamber 6.
The cartridge 1 is protruded so as to be elastically holdable between the film drawer side wall 9b and the side wall 9b on the film drawer side.

(Problems to be Solved by the Invention) The spring body 8 includes a thin spring body 8a with a small spring constant or a thick spring body 8b with a large spring constant. However, the thin spring body 8a needs to be displaced largely in order to generate the torque necessary to hold the cartridge 1, and the tip of the spring body 8a protrudes into the cartridge storage chamber 6.
It becomes difficult to insert cartridge 1. Therefore, a thick spring body 8b with a small amount of displacement is often used.

In addition, in recent years, automatic winding type cameras and cameras with DX contact pieces have become more common, and the torque of the spring body that holds the cartridge is important in order to stabilize the film winding torque and the contact of the DX contact piece. I'm getting used to it.

However, as mentioned above, if a spring body with a large spring constant and a small displacement is used, the diameter of the cartridge will be different (JIS and ISO do not specify the diameter of the center of the cartridge, so in the market there are
(Available in various sizes up to 25.3mm in diameter), the torque used to hold the cartridge by the spring body changes greatly, causing the problem that the cartridge cannot be held with a nearly constant torque.

The present invention was devised in view of these points, and allows the cartridge to be held in the cartridge storage chamber with an almost constant elastic force regardless of its diameter, making it easy to insert the cartridge into the cartridge storage chamber. It is an object of the present invention to provide a cartridge holding device for a camera that can be used in various ways.

[Structure of the idea]

(Means for Solving the Problems) The present invention provides a film cartridge 30 that is fixed to the side walls 14 and 15 of the film cartridge 30 in the cartridge storage chamber 12. In a camera cartridge holding device including an elastic body 20 that protrudes to be able to elastically hold a cartridge 30 between it and the side wall 13 on the film drawer side of the storage chamber 12, a hook piece 23 is provided on the tip side of the elastic body 20. This hook piece 2
3 is fixed to the side wall 13 on the film drawer side so as to limit the amount by which the tip end of the elastic body 20 protrudes toward the side wall 13 on the film drawer side, and to maintain a substantially constant elasticity at all times.
It is hung on the side wall 15 facing the.

(Function) In the present invention, the hooking piece 23 provided on the tip side of the elastic body 20 is hooked on the side wall 15 opposite to the side wall 13 on the film drawer side, so that the elastic body 20 has a predetermined elasticity. When installing the cartridge 30 into the cartridge storage chamber 12, the cartridge 3
0 can be held stably with a substantially constant elastic force, and the amount by which the tip side of the elastic body 20 protrudes is regulated so that the cartridge 30 can be inserted into the cartridge storage chamber 12 without protruding too much into the entrance of the cartridge storage chamber 12. It allows for easy insertion.

(Example) An example of the present invention will be described below with reference to FIG.

In the figure, reference numeral 11 denotes a camera body equipped with a lens, etc. (not shown), and a cartridge storage chamber 12 is formed inside this camera body 11. The cartridge storage chamber 12 has a side wall 13 on the film drawer side and a side wall 13 on the film drawer side so as to open on the back side of the camera body 11.
It is formed from a side wall 14 on the front side of the camera body 14 and a side wall 15 opposite to the side wall 13, and is opened and closed by a lid body 16 that is attached to the back of the camera body 11 so as to be openable and closable. Furthermore, when the lid 16 is attached to the camera body 11, the outside of the side wall 15 and the end 16a of the lid 16 are
A gap 17 is formed between the two.

Further, 20 is a spring body as an elastic body, and this spring body 20 is formed of, for example, a thin plate with a small spring constant, and is provided with a fixing piece 21 at the base end and a pressing piece 22 at the distal end. A hooking piece 23 is bent from the tip of this pressing piece 22 to the outside of the cartridge storage chamber 12 in a substantially U-shape. The fixing piece 21 of this spring body 20 is fixed to the inner surface of the side wall 14 with a fixing screw 25, and the pressing piece 22
By hooking the hooking piece 23 onto the side wall 15, the tip of the spring body 29 is moved from the position of the pressing piece 22a, which projects toward the center of the cartridge storage chamber in its natural state, to the side wall 13 on the film drawer side. The amount of protrusion in this direction is restricted and the pressing piece 22b is elastically displaced to the position, and in this state, a substantially constant elasticity is always applied in the direction of the side wall 13 on the film draw-out side.

Reference numeral 30 denotes a cylindrical cartridge, and a film 32 is wound around a cartridge shaft 31 inserted through the cartridge 30, and the film 32 is drawn out from a lead-out portion 33 provided on the outside of the cartridge 30.

Then, when storing the cartridge 30 in the cartridge storage chamber 12 of the camera body 11, the spring body 20
Since the pressing piece 22 has its hooking piece 23 hooked on the side wall 15 to open the entrance of the cartridge storage chamber 12, the cartridge 30 can be easily inserted.

In addition, the cartridge 30 is stored in the cartridge storage room 12.
When the cartridge 30 is stored, the spring body 2
The pressure piece 22 is held between itself and the side wall 13 on the film extraction side by a substantially constant elastic force of the pressure piece 22.

Note that the spring body 20 is not limited to the above embodiment,
As shown in FIG. 2, the fixing piece 21 of the spring body 20 may be fixed to the side wall 15 opposite to the side wall 13 on the film drawer side, and as shown in FIG. 22 has an approximately L-shaped hook piece 23
The hook piece 23 may be hooked into a window hole 15a formed in the side wall 15.

[Effect of idea]

According to the present invention, a hook piece is provided on the tip side of the elastic body that holds the cartridge between it and the side wall on the film drawer side, and by hooking this hook piece on the side wall opposite to the side wall on the film drawer side, the elastic body Since the body can have almost constant elasticity in the direction of the side wall on the film drawer side, the cartridge can be stably held in the cartridge storage chamber regardless of the diameter of the cartridge. The distal end side of the cartridge does not protrude significantly into the entrance of the cartridge storage chamber, and the cartridge can be easily inserted into the cartridge storage chamber.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view showing one embodiment of the device of the present invention, FIG. 2 is a partial sectional view showing another embodiment of the device of the present invention, and FIG. 3 is a further embodiment of the device of the present invention. FIG. 4 is a perspective view showing a cartridge, and FIG. 5 is a partial sectional view showing a conventional device. 12... Patrone storage room, 13, 14, 15
... Side wall, 20 ... Spring body as an elastic body, 23
...Hatch piece, 30...Patrone.

Claims (1)

[Scope of Claim for Utility Model Registration] In a cartridge storage chamber for storing a film cartridge, the proximal end is fixed to the side wall of the cartridge storage chamber, and the distal end is fixed to the side wall of the film drawer side of the cartridge storage chamber. In a camera cartridge holding device equipped with an elastic body that protrudes to be able to elastically hold a cartridge, a hook piece is provided on the tip side of the elastic body, and the hook piece is attached to the side wall of the film drawer side with the tip side of the elastic body. What is claimed is: 1. A camera cartridge holding device, characterized in that it is hooked on a side wall opposite to the side wall on the film drawer side so as to limit the amount of protrusion in the direction and to maintain substantially constant elasticity at all times.