JPS6139406Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a camera bag for detachably attaching a film holder to a large-sized camera.

Since large cameras use film stored in a film holder, a camera bag is attached to the back of the camera to removably attach the film holder.This camera bag has a mounting frame and a focusing glass attached to the camera. It consists of a presser frame, and the inserted film holder is held between the mounting frame and the presser frame.

In order to hold the film holder, leaf springs are installed between the mounting frame and the presser frame on both the upper and lower sides to keep the presser frame in constant pressure contact with the mounting frame, but in conventional camera bags, the pressure of the leaf springs on both sides cannot be adjusted. The structure made it completely impossible. That is, as shown in FIG. 5, the length, width, and thickness of the leaf spring 28 and its mounting structure in the conventional camera bag are determined to suit the purpose of use, but the length, width, and thickness of the leaf spring 28 are determined to suit the purpose of use. Since we use a product that has been pre-bent and then hardened so that its free posture in the elastic direction is partly shown by imaginary lines, the mounting structure for the camera bag on the inner surface of the holding frame 21 is such that the base end of the leaf spring 28 is overlapped. The actual situation is that the leaf springs 28 are closely spaced in a shape and immovably fixed with an appropriate number of mounting screws 33, and no consideration is given to adjusting the reaction force strength of the leaf spring 28 after the leaf springs 28 are mounted. However, it is extremely difficult to obtain leaf springs with equal elasticity due to manufacturing errors and quality errors, and as a result, the pressing forces of the leaf springs on both sides become uneven, causing wobbling when the film holder is attached to the film holder. There are inconveniences such as interfering with the operation of inserting and removing the holder, and the film holder cannot be held with sufficient strength depending on the usage conditions.

The present invention was developed to solve the above-mentioned disadvantages of the conventional camera bag.The purpose of this invention is to make it possible to adjust the pressure of the leaf springs on both sides that provide elasticity for holding the film holder in the presser frame. To provide a camera bag in which the pressure of leaf springs on both sides is equal, the film holder can be smoothly inserted and removed without rattling, and the optimum clamping elasticity can be obtained depending on the conditions of use.

Next, the details of an embodiment of the present invention will be described below based on the accompanying drawings showing one embodiment of the present invention.

In the figure, 1 is a mounting frame fixed to the camera 2, which includes a rectangular tube-shaped spacer 4 fixed to the back of the camera 2 with a mounting screw 3, a frame-shaped slide base 5 fixed to the back of this spacer 4, It consists of a movable frame 6 attached to the back surface of the slide base 5. Dovetail grooves 7 are formed in parallel on the upper and lower inner circumferences of the slide base 5 (see Fig. 4), and the movable frame 6 can slide freely into the dovetail grooves 7 on the upper and lower edges of the surface that overlaps with the base 5. A fitting protrusion 8 is provided, and by fitting the protrusion 8 and the dovetail groove 7, the movable frame 6 can be slid laterally with respect to the slide base 5.

Then, a locking screw 9 is attached to a position approximately at the lower center of the slide base 5, and by screwing it in, the razor 10 interposed between the dovetail groove 7 and the protrusion 8 is pressed against the protrusion 8, and the movable frame 6 is moved to an arbitrary position. This allows it to be fixed in position.

Further, a storage recess 12 into which a film holder 11 having flanges on the upper and lower edges is fitted is formed on the back surface of the movable frame 6, and a pair of holder fixtures 13 are attached to the upper and lower back surfaces of the movable frame 6. As shown in FIG. 1, the holder fixture 13 has elongated holes 15 that are inclined in the same direction as the longitudinal direction of the press plate 14 near both ends of the horizontally long press plate 14, and one end thereof. It is attached by screwing the screws 17 that pass through the long holes 15 on both sides into the movable frame 6, and when lateral movement is applied, the screws 17 guide the long holes 15. The holder 11 is moved in the vertical direction, and when it is projected into the storage recess 12, the collar is pressed down to fix the holder 11 to the movable frame 6.

The storage recess 12 in the movable frame 6 is open at both ends of the movable frame 6, as shown in FIG. A hole 19 is provided so that the holder 11 can always be attached to the movable frame 6 at a fixed position.

Although the film holder 11 is a Polaroid (registered trademark) model 405 land pack film holder in the illustration, a 4" x 5" international standard film holder also has approximately the same shape and size, and is attached to the movable frame 6. It will be installed in the same position.

Generally, the center position of the film opening 20 in the film holder 11 is
There is a shift in the lateral direction between the holder and the international standard film holder, resulting in two center positions of the film opening 20 with respect to the movable frame 6. By moving the movable frame 6 laterally by the shift in center position, , the center position of the film opening 20 of any film holder can be aligned with the center of the viewfinder of the camera, and due to the lateral movement of the movable frame 6, it is possible to match the center position of the film opening 20 with the center of the viewfinder of the camera. ) You will be able to use film.

21 is a film holder 11 attached to the back side of the movable frame 6 and inserted between the movable frame 6 and the movable frame 6;
It is a presser frame that clamps and holds the holder 11, and is movable to allow insertion of the holder 11 from a state overlapping the back surface of the movable frame 6.

As shown in FIG. 1, this presser frame 21 is formed into a rectangular frame shape, and a focusing glass 22 is stretched inside the concave shape with a presser foot 23. An arm 24 is attached to the hollow interior of the upper and lower edges of the presser frame 21 at a position closer to the left side in FIG. 3. The arm 24 has a pivot 25 whose base end is supported by the presser frame 21.
The hook 26 is attached to the movable frame 6 and is rotatable about the pivot 25, and a hook 26 is formed at the tip to bend toward the movable frame 6 side.

In addition, the arm 24 is located at the upper and lower center of the movable frame 6.
A pin 27 is attached to which the hook 26 engages, and the movable frame 6 and presser frame 21 are connected via the arm 24 so that they can move toward and away from each other. Furthermore, a leaf spring 28 is installed in the hollow interior of the upper and lower edges of the presser frame 21 to provide elasticity to the presser frame 21 in a direction in which the presser frame 21 is pressed against the movable frame 6 at all times via an arm 24.

This leaf spring 28 extends long along the lateral direction of the presser frame 21, and is supported halfway toward the base end of the leaf spring 28 at the right end in FIG. 3 of the presser frame 21 where the base end side of the leaf spring 28 is located. A fulcrum shaft 29 is provided. The tip of the leaf spring 28 is press-fitted to a spring receiver 30 provided halfway toward the base end of the arm 24, and a spring pressure adjustment mechanism 31, which will be described later, is provided at the base end on the right side of the fulcrum shaft 29 in FIG.

The leaf spring 28 imparts elasticity to the pressing frame 2 toward the movable frame 6 by curving from the portion near the base end supported by the fulcrum shaft 29 to the tip end which is in pressure contact with the spring receiver 30 .

Further, as shown in FIG. 3, the spring pressure adjustment mechanism 31 is composed of a screw hole 32 formed at the base end of the leaf spring 28, and an adjustment screw 38 screwed into the screw hole 32. By screwing in the amount by which the tip of the leaf spring 28 protrudes from the back surface of the leaf spring 28, the base end of the leaf spring 28, which is to be supported in contact with the inner surface of the presser frame 21, is lifted up with the fulcrum shaft 29 as a boundary. The amount of warpage is adjusted to change the elasticity from the fulcrum shaft 29 to the tip side. In other words, if the warpage on the proximal side from the fulcrum shaft 29 is increased, the fulcrum shaft 2
9, the spring acting force on the tip side increases.

If the adjustment screw 33 cannot be directly screwed onto the leaf spring 28, an adjustment screw may be attached to the presser frame 21, and the base end of the leaf spring may be pressed with this screw to give the warp.

The present invention has the structure as described above, and when the film holder 11 is not mounted, the presser frame 21 is pressed against the movable frame 6 as shown in FIG.
is at the same position as the film surface, and the image reflected on the focusing glass 22 enables focusing.

Next, to load the film holder 11, insert the film holder 11 between the presser frame 21 and the movable frame 6 from the right end side in FIG. do. When the film holder 11 enters, the presser frame 21 is separated from the movable frame 6 and the arm 24 is raised. The arm 24 pulls up the tip side of the leaf spring 28, so that the presser frame 21 clamps the film holder 11 with the movable frame 6 due to the repulsive elasticity of the leaf spring 28, and as shown in FIG. In this state, the surface of the frontmost film loaded in the film holder 11 matches the focusing position, and the film opening 2
Shooting becomes possible by opening 0. After photographing, the film holder 11 can be pulled out from between the presser frame 21 and the movable frame 6 against the pressing elasticity of the presser frame 21.

The leaf springs 28 on both sides for clamping the film holder 11 are set so that they have equal elasticity depending on the screwing amount of the adjusting screw 33, and are set so that they have the optimum clamping elasticity depending on the type of film holder 11. It is something to be adjusted.

As described above, the present invention connects the mounting frame fixed to the camera and the presser frame, which clamps the film holder between the mounting frame and the presser frame, by means of an arm equipped with a hook and a pin, so that they can move toward and away from each other. consists of a leaf spring that constantly applies pressure contact elasticity to the presser frame toward the mounting frame side through the arm, and a spring pressure that sets the strength of the leaf spring by warping the base end of the leaf spring. Since the adjustment mechanism is installed, the elasticity with which the film holder is clamped between the presser frame and the mounting frame can be set to the optimum state depending on the film holder used, and it also absorbs the material and manufacturing errors of the leaf spring. , the elasticity on both sides can be adjusted to be exactly the same, and it has excellent effects such as no rattling or loosening when the film holder is attached, and it facilitates the operation of attaching and detaching the film holder. It is possible.

[Brief explanation of the drawing]

The drawings show an embodiment of the camera bag according to the present invention. Fig. 1 is a partially cutaway rear view showing the state before the film holder is loaded, Fig. 2 is a cross-sectional plan view of the same, and Fig. 3 shows the film holder. FIG. 4 is a cross-sectional side view of the loaded state; FIG. 5 is an explanatory diagram showing the shape of a leaf spring and its attachment means in a conventional camera bag. 1 is a mounting frame, 2 is a camera, 6 is a movable frame, 11 is a film holder, 12 is a storage recess, 13 is a holder fixture, 20 is a film opening, 21 is a presser frame, 22 is a focusing glass, 24 is an arm, 25 26 is a hook, 27 is a pin, 28 is a leaf spring, 29 is a fulcrum shaft, 30 is a spring receiver, 31 is a spring pressure adjustment mechanism, 32 is a screw hole, and 33 is an adjustment screw.

Claims (1)

[Scope of utility model registration request] It consists of a mounting frame that is fixed to the camera, a holding frame that has a focusing glass, and that holds the film holder between the mounting frame, and an arm that has hooks at its ends that bend toward the mounting frame on both upper and lower sides of the holding frame. pins are attached to the upper and lower sides of the mounting frame, and the pins on which the hooks of the arms engage are attached to the presser frame, and the tip of the presser frame is hooked and press-contacted to the arm, and the proximal end is supported by a fulcrum provided on the presser frame. and a leaf spring that constantly applies pressure contact elasticity toward the mounting frame through the arm, and a leaf spring that is located on the proximal end side of the fulcrum of the leaf spring and is bent by warping the base end of the leaf spring. A camera bag for a large camera, characterized in that it is equipped with a spring pressure adjustment mechanism for setting the strength of the leaf spring.