JPH0547934U - Film cartridge positioning structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a positioning structure capable of reliably regulating the cartridge to an appropriate position by positioning the cartridge by pressing a plurality of reference surfaces against the wall surface of the cartridge chamber. With the goal. [Structure] By pressing a portion of one side of a cartridge 1 which is perpendicular to the spool 2 and opposite to the reference plane C formed on one side by a spring 22 provided in the cartridge chamber 10, the cartridge 1 is separated from the spool 2. Positioned in a parallel orientation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a film cartridge positioning structure for loading a cartridge chamber of a camera.

[0002]

[Prior Art]

 Conventionally, a so-called thrust type film cartridge has been proposed in which a fork on the camera side feeds out a film leader portion housed in the cartridge. Further, as a positioning reference in the cartridge chamber of this film cartridge, a reference surface (data) is provided so that the film cartridge properly contacts the cartridge chamber, and the film outlet is brought into contact by bringing this reference surface into contact with the film cartridge chamber. What regulates the position of is proposed.

Now, the premise of the present invention will be described below with reference to FIG. 1 showing the present embodiment. In the upper and lower portions of the side surface of the protrusion 4 of the cartridge 1 where the film outlet 3 is provided, A reference surface A1 and a reference surface A2 for positioning the posture in the direction parallel to the film surface are formed, and a reference surface A3 for positioning the posture in the direction parallel to the film surface is formed on the side surface of the cartridge 1. A reference plane B1 and a reference plane B2 are formed on the side surfaces at positions adjacent to the reference plane A1 and the reference plane A2, which are orthogonal to the reference plane A1 and the reference plane A2, respectively, and which position the posture in the direction perpendicular to the film plane. A reference plane C for positioning the posture in a direction parallel to the spool 2 is formed on one of the two surfaces of the cartridge 1 which is orthogonal to the spool 2.

The cartridge is positioned by pressing each reference surface against the wall surface of the cartridge chamber using a plurality of springs. That is, for example, a spring is provided in the cartridge chamber for pressing the reference surface C against the head or bottom of the cartridge chamber, whereby the cartridge 1 is fixed to the cartridge chamber and the position of the film outlet 3 is regulated. ing.

[0005]

[Problems to be solved by the device]

 However, in the conventional spring for positioning the reference plane C as described above, if the arrangement position, that is, the pressing position of the spring is not appropriate, the pressing force of each spring interferes with each other and the cartridge is tilted instead. There is a problem that it is difficult to stably regulate the position of the film outlet. The present invention solves the above-mentioned problem, and the pressing forces of the springs do not interfere with each other, the film cartridge is pressed stably, the cartridge is not tilted, and the position of the film exit is ensured. It is an object of the present invention to provide a film cartridge positioning structure that can be regulated according to the above.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides first and second reference surfaces, which are formed on upper and lower portions of a side surface of a projecting portion of a film outlet of a film cartridge and position a posture in a direction parallel to a film surface, and the film. A third reference surface formed on the side surface of the cartridge and positioned in a direction parallel to the film surface, and a first reference surface formed on the side surface of the film cartridge and adjacent to the first and second reference surfaces, respectively. One of the fourth and fifth reference planes, which is orthogonal to the second reference plane and positions the posture in the direction perpendicular to the film plane, and the two planes, which are orthogonal to the spool axis of the film cartridge. And a cartridge chamber (10) of a camera in which a film cartridge having a sixth reference surface for positioning a formed posture in a direction parallel to the spool axis is provided. The ridge chamber 10 has a camera-side reference surface that comes into contact with the sixth reference surface, and is a cartridge surface on the side opposite to the sixth reference surface, and the sixth reference surface and the camera-side reference surface. It is equipped with a pressing spring that presses the part corresponding to the common area.

[0007]

[Action]

 According to the above configuration, on the cartridge surface opposite to the sixth reference surface, the portion directly opposite to the sixth reference surface is pressed by the spring provided in the cartridge chamber 10. The posture can be positioned and the cartridge will not tilt.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a film cartridge used in this embodiment. As the film cartridge, a cartridge 1 in which a film (not shown) is stored, a spool 2 around which the film is wound around the cartridge 1 and a film formed on a protrusion 4 of the cartridge 1 are delivered. Film exit 3.

Further, the cartridge 1 has a reference plane A1 and a reference plane A2 for positioning a posture in a direction parallel to the film surfaces formed above and below the side surface of the protrusion 4, and the reference plane A1 and the reference plane A2. A reference surface A3 that is positioned parallel to the film surface formed on the side surface of the cartridge 1 and a reference surface A1 formed on the side surface of the cartridge 1 and a reference surface at a position adjacent to the reference surface A2. A1 and the reference plane A2, which are orthogonal to the film plane and which determine the orientation in the direction perpendicular to the film plane, are the reference plane B1 and the reference plane B2, and the camera-side forks (not shown) on both sides orthogonal to the spool 2 of the cartridge 1. Is a head surface, and a reference surface C formed on the opposite bottom surface for positioning the posture in a direction parallel to the spool 2.

The reference planes provided in the film cartridge having the above-described structure are the minimum necessary planes for regulating the film outlet 3 in parallel with the film plane, and all the reference planes contact the cartridge chamber 10. If the state is set to, the film outlet 3 is loaded in parallel to the film surface, and the film can be stably fed.

Next, a case where the spring presses each reference surface will be described with reference to FIGS. Particularly, in this embodiment, as shown in FIG. 2, the reference plane A3 is provided at a position substantially equidistant from the reference plane A1 and the reference plane A2 when viewed from the direction perpendicular to the film plane. Therefore, when the spring is pressed from the back side of the surface of the cartridge 1 shown in the figure, as shown in the area 5 connecting the reference surfaces A 1, A 2 and A 3, the pressing force applied to each reference surface is It is well balanced. Therefore, the degree of freedom in arranging the springs is increased, and the position of the film outlet 3 can be regulated stably even if the loaded state of the cartridge 1 in the cartridge chamber 10 deteriorates.

Further, the relationship between the arrangement of springs and the reference plane A3 will be described with reference to FIG. In FIG. 3 (a), when the cartridge 1 in which the reference plane A3 is not arranged is loaded in the cartridge chamber 10 and the spring presses the cartridge 1 in the arrow P1 and P2 directions, the film outlet 3 is properly positioned. In order to be restricted to the position, the spring needs to press the cartridge 1 within the range of W1 and W2. This spring corresponds to springs 20 and 21 in FIG. 5 described later. Then, as shown in FIG. 3B, when the pressure applied by the spring deviates from the above range of W1 and W2, or the cartridge 1 moves within the cartridge chamber 10 and the pressing point is indicated by the arrow P1. If it has moved to the position indicated by P 2, the cartridge 1 rotates in the cartridge chamber 10 as shown in FIG. 3C, and the film outlet 3 cannot be properly regulated. Therefore, it is necessary to provide the reference surface A3 in the above-mentioned portion, and this prevents the cartridge 1 from rotating in the cartridge chamber 10.

On the other hand, in FIG. 4A, when the cartridge 1 is pressed in the range of W3 in the direction of arrow P3 from directly opposite to the reference plane C, this pressing force causes the cartridge 1 to be perpendicular to the film surface. Since the cartridge 1 is supported in a direction perpendicular to the film surface by the pressing force in the direction of the arrow P2, the film outlet 3 can be stably regulated properly. However, if the pressing point moves to the position shown by the arrow P3 as shown in FIG. 4B, the pressing force of the arrow P2 cannot be balanced, and the cartridge 1 tilts and is perpendicular to the film surface. I can't keep my posture.

Next, a positioning structure according to this embodiment that satisfies all the above conditions will be described with reference to FIG. FIG. 5 is a view showing a case where the film cartridge is loaded into the camera having the film cartridge positioning structure. The camera side cartridge chamber 10 has an openable / closable cartridge lid 11, a spring 20 for pressing the reference surface A1 and the reference surface A2 against the wall surface of the cartridge chamber 10, and the reference surface B1 and the reference surface B2 for the cartridge chamber 10. A spring 21 that presses against the wall surface is provided. Furthermore, the cartridge lid 11 is provided with a spring 22 that presses the reference surface C against the head surface (lower surface in the figure) of the cartridge chamber 10.

With the above configuration, the reference surface A1 and the reference surface A2 are pressed against the wall surface of the cartridge chamber 10 by the spring 20, so that the cartridge 1 maintains the posture in the direction parallel to the film surface, and the reference surface B1 and the reference surface B1. The surface B2 is pressed by the spring 21 to maintain the posture in the direction perpendicular to the film surface, and when viewed from the direction perpendicular to the film plane, the reference surface A1 and the reference surface A2 are located at substantially equal distances from each other. By providing A3, it is easy to balance the pressing force of the spring 20 and the spring 21, and the cartridge 1 maintains the posture in the direction parallel to the film surface. This has the advantage of increasing the degree of freedom in the arrangement of the springs 20 and 21. That is, the springs 20 and 21 may be pressed within the range of the triangular area 5 shown by the diagonal lines in FIG. Further, since the reference plane C is pressed by the spring 22, the cartridge 1 maintains its posture in the direction parallel to the spool 2. Therefore, the film outlet 3 is stably regulated at an appropriate position.

The present invention is not limited to the above, and various modifications are possible. For example, although the reference plane C is provided on the bottom surface of the cartridge 1 in the present embodiment, the reference plane C is set on the head surface of the cartridge 1. By providing the spring 22 on the head of the cartridge chamber 10, the same effect as described above can be obtained.

[0017]

[Effect of the device]

 As described above, according to the present invention, the cartridge, which is formed on one of the surfaces parallel to the spool of the cartridge and is positioned opposite to the sixth reference surface for positioning the attitude in the direction parallel to the axial direction of the cartridge. By pressing the surface with a spring, the film cartridge loaded in the cartridge chamber is prevented from tilting or moving, and the film exit can be regulated at an appropriate position to stabilize the film surface.

[Brief description of drawings]

FIG. 1 is a view showing a film cartridge according to an embodiment of the present invention.

FIG. 2 is a side view of the film cartridge of this embodiment.

FIG. 3 is a vertical cross-sectional view of a cartridge chamber in which a film cartridge is loaded, in which (a), (b), and (c) are views showing the position of the force pushing the cartridge and the action thereof.

4A and 4B are side sectional views of a cartridge chamber in which a film cartridge is loaded, FIG. 4A is a sectional view according to an embodiment of the present invention, and FIG. 4B is a sectional view when the present invention is not implemented.

FIG. 5 is a perspective view showing a positioning structure of a film camera according to an embodiment of the present invention.

[Explanation of symbols]

 1 Cartridge 2 Spool 3 Film exit A1 Reference plane A2 Reference plane A3 Reference plane B1 Reference plane B2 Reference plane C Reference plane 20 Spring 21 Spring 22 Spring

Claims (1)

[Scope of utility model registration request] 1. A first and a second reference surface formed on upper and lower portions of a side surface of a projecting portion of a film outlet of a film cartridge for positioning a posture in a direction parallel to the film surface, and formed on the side surface of the film cartridge, A third reference surface for positioning the posture in a direction parallel to the film surface, and a first reference surface and a second reference surface formed on the side surface of the film cartridge and adjacent to the first and second reference surfaces, respectively. Fourth and fifth reference surfaces which are orthogonal to each other and which position the posture in a direction perpendicular to the film surface, and the spool shaft formed on either one of both surfaces orthogonal to the spool shaft of the film cartridge. Sixth for positioning postures in parallel directions
A cartridge chamber of a camera into which a film cartridge having a reference surface is loaded, the cartridge chamber having a camera-side reference surface that abuts against the sixth reference surface, In the cartridge surface, the sixth
2. A film cartridge positioning structure, comprising: a pressing spring for pressing a portion corresponding to a common area between the reference surface and the reference surface on the camera side.