JPH095939A - Film unit with lens - Google Patents

Abstract

PURPOSE: To prevent a control button for a stroboscope from being inadvertently pressed. CONSTITUTION: On the front side of a front cover 28, a projection 52 is composed at the position without imparting any trouble to the operation in the vicinity of an end part on a side apart from a projecting part 19 of an operation lever 49. Since the stroboscope charging switch 22 is housed inside the 2-dotted chain line 54 that connects a vertex of the projection 52 and the vertex of the projecting part 19, the stroboscope charging switch 22 is protected by the lens hood 19 and the projection 52, even if the film unit with lens is placed in a state of the front side down, therefore the consumption of a dry cell caused by the operation lever 49 being inadvertently pressed can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a lens-fitted film unit having a strobe charging switch on the front surface.

[0002]

2. Description of the Related Art A lens-fitted film unit having a built-in photo film and a simple shooting function has been widely sold. Some of the lens-fitted film units are capable of stroboscopic photography (for example, The product name is "Sharing Run Flash" etc.) Such a lens-fitted photo film unit with a built-in flash has a small built-in strobe unit.When shooting a flash, a strobe for powering up the front surface of the lens-fitted photo film unit is used. When the charging switch is operated to charge the strobe unit and the shutter button is operated after the charging is completed, strobe light is emitted together with the shutter release.

The strobe charging switch has been simplified because it is necessary to keep the lens-fitted film unit at a low price, and two metal contacts are provided on the two contact portions formed on the circuit board of the strobe unit. , And the strobe circuit is closed to start charging. As the operation button for bringing the metal contact piece into contact with the contact part, a tongue-shaped one that is elastically integrally formed on the front surface of the front cover is often used. Contact the part. Further, a ridge for protecting the operation button is formed on the outer circumference of the operation button so as not to be inadvertently pressed when being carried. This ridge is partially cut out so as not to impair the operability of the operation button.

Further, various strobe charging switches have been proposed which can selectively use two kinds of operating methods according to the photographing situation. As shown in FIG. 7, the strobe charging switch 2 has an operating lever 4 as an operating button which is movably assembled on the front surface of the front cover 3, and when the operating lever 4 is laid down, the metal contact piece 5 is pressed by the circuit. When the operation lever 4 is erected as shown by the chain double-dashed line in the figure, the metal contact piece 5 is kept pressed against the circuit board 6 for continuous strobe charging. You can do it.

[0005]

However, in the strobe charging switch 2 described above, a two-dot chain line 9 connecting the apex of the raised portion 8 covering the periphery of the photographing lens and the end of the front cover 3 is formed.
Then, the end of the operation lever 4 is caught. According to this, when the lens-fitted photo film units are randomly stacked at a store or the like, or when the mobile phone is carried, the end portion of the operation lever 4 may be pressed to perform strobe charging. As described above, if the strobe is charged when the strobe unit is not used, the dry battery, which is the power source of the strobe unit, is uselessly consumed, which causes a problem in actual photographing. It is also possible to enclose the entire circumference of the strobe charging switch 2 with a ridge, but there is a problem in that the operability when the operation lever 4 is triggered is adversely affected.

The present invention has been made in view of the above problems, and it is an object of the present invention to prevent the consumption of a dry battery due to the operation button of a strobe charging switch being inadvertently pressed.

[0007]

In order to solve the above problems, a film unit with a lens according to claim 1 is provided.
On the front surface of the front cover, a ridge that partially surrounds the end of the operation button on the side of the ridge that covers the periphery of the taking lens, and a ridge protruding toward the front side of the end of the operation button and away from the ridge A protrusion projecting to the front side of the other end of the operation button is provided at a position near the other end of the operation button on the side where the operation is not hindered. In addition, claim 2
In the lens-equipped film unit described above, the protrusion amount of the protrusion is set such that the operation button can be housed inside the line connecting the apex of the protrusion and the apex of the raised portion that surrounds the periphery of the photographing lens. This prevents the strobe charging switch from being inadvertently pressed when the lens-fitted film unit is placed with its front side facing downward.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 2 showing the external appearance of a lens-fitted film unit of the present invention, a lens-fitted film unit 12
Is a type that is designed to be made thinner, and is composed of a unit main body 13 having a photographing mechanism and the like built therein and a paper box 14 for storing the same. The paper box 14 has a contour that exposes the winding knob 15, the stroboscopic light emitting unit 16, the shutter button 17 and the like incorporated in the unit main body 13, and a raised portion 19 that covers the taking lens 18.
Holes are provided to expose the finder 20, the number-of-shots display window 21, and the like. A strobe charge switch 22 is provided below the strobe light emitting section 16.

As shown in exploded view in FIG. 3, the unit main body 13 is composed of a main body base 24, an exposure unit 25, a strobe unit 26, a rear cover 27 and a front cover 28, which are engaged by claw engagement. It is detachably assembled.

The main body base 24 is made of opaque plastic, and on both sides sandwiching the optical axis 30, a cartridge storage chamber 31 for storing a cartridge and a film roll chamber 32 for storing a photographic film in a roll form. Are integrally formed. The front of the outer wall of the Patrone storage room 31
The film roll chamber 32 has a shape projecting forward of the outer wall front surface.

The rear cover 27 is made of an opaque plastic and is assembled on the back side of the main body base 24 to keep the cartridge storage chamber 31 and the film roll chamber 32 light-tight. The rear cover 27 is integrally provided with pull-top type lids 27a and 27b for covering the bottom surfaces of the cartridge storage chamber 31 and the film roll chamber 32, respectively. The lid 27a is a cartridge storing the exposed photographic film. It serves as a take-out lid when taking out.

In the exposure unit 25, a base portion 34 made of opaque plastic is incorporated with a film number display plate 35 for displaying the number of remaining frames, a film winding mechanism including shutter blades, and a shutter mechanism. . Further, the taking lens 18 is incorporated in the front surface of the base portion 34, and the finder 20 is incorporated in the upper portion. The exposure unit 25 is detachably attached to the front surface of the main body base 24.

The strobe unit 26 comprises a circuit board 37 and a strobe light emitting section 16. Circuit board 3
7 is a main capacitor 38 that constitutes a strobe circuit.
And the like, a synchro switch 39 that is turned on by the shutter mechanism of the exposure unit 25, and contact pieces 41a and 41b for connecting the dry battery 40 that is the power source of the strobe unit 26 are attached.

On the circuit board 37, two contact portions 42a and 42b are provided close to each other for a charging switch for the strobe circuit. Then, these contact portions 42a, 42b
A metal contact piece 43 for simultaneously contacting the battery and starting charging.
Are arranged so as to face the contact portions 42a and 42b. The metal contact piece 43 is attached to the front surface of the outer wall of the film roll chamber 32 of the main body base 24, and is brought into contact with the contact portions 42a and 42b by operating the strobe charging switch 22. Further, wing-shaped leaf springs 43a and 43b are integrally formed on both sides of the metal contact piece 43, and the leaf springs 43a and 43b come into contact with the front surface of the film roll chamber 32 so that the unit main body 13 Generates elasticity toward the front side.

The front cover 28 is made of opaque plastic, and has a shutter button 17 and a window 2 for displaying the number of shots.
1, an opening 45 for the stroboscopic light emitting section 16 and the like are formed. The front cover 28 is formed with a protrusion 46 that matches the protrusion of the cartridge storage chamber 31, and this protrusion 46 serves as a grip during photographing.

The strobe charging switch 22 provided below the opening 45 is integrally formed with the front cover 28 so as to have elasticity, and a pressing piece 48 arranged on the front side of the metal contact piece 43, and this pressing piece. An operation lever 49, which is an operation button assembled to the front surface of the free end side of 48, holds the operation lever 49 up and down with respect to the front surface of the front cover 28, and partially forms the outer periphery of the operation lever 49 on the raised portion 19 side. And a projecting ridge 50 that surrounds it.

The operating lever 49 presses the pressing piece 48 when standing upright with respect to the front surface of the front cover 28, and the metal contact piece 43.
Is held in contact with the contact portions 42a and 42b of the circuit board 37. As a result, the strobe unit 26 is continuously charged by strobe. In addition, the operating lever 49
Can be pressed like a conventional strobe charging switch when it is laid down on the front surface of the front cover 28. In this case, the metal contact piece 43 is held only while the operation lever 49 is pressed. Is contacted with the contact portions 42a and 42b, and strobe charging is performed. The leaf springs 43a and 43b of the metal contact piece 43 urge the pressing piece 48 and the operating lever 49 toward the front side.

A projection 52 is integrally formed on the front surface of the front cover 28 so as to project forward. The protrusion 52 is provided at a position separated from the end of the operation lever 49 on the side away from the raised portion 19 by a predetermined distance that does not hinder the operation of the operation lever 49, and as shown in FIG. It is exposed to the outside from the paper box 14. And
As shown in FIG. 1, the strobe charging switch 22 is housed inside the chain double-dashed line 54 connecting the apex of the protrusion 52 and the apex of the raised portion 19. According to this, even if the lens-fitted photo film unit 12 is placed with its front surface facing downward, the strobe charging switch 22 does not touch the mounting surface, so that the operating lever 49 is not inadvertently pressed, which is a waste. It is possible to prevent unnecessary flash charging.

Further, the protrusion 52 is notched inside and can be used for attaching a strap. Further, as shown in FIG. 4, the projection 54 may be formed in an arc shape along the operation lever 49, which can prevent pressing by a wide ridge line.

FIG. 5 shows another embodiment of the present invention. In this embodiment, as shown in FIG. 3A, a pair of protrusions 56a and 56b are provided on the upper and lower parts outside the operation lever 49.
Is provided. Then, as shown in FIG. 2B, the strobe charging switch 2 is attached to the chain double-dashed line 57 formed by the apexes of the protrusions 56a and 56b and the apex of the raised portion 19.
The protrusion amounts of the protrusions 56a and 56b are set so that 2 does not occur. According to this, as in the above-mentioned embodiment,
It is possible to prevent inadvertent pressing of the operating lever 49,
It is possible to prevent unnecessary flash charging.

FIG. 6 shows still another embodiment of the present invention. In the present embodiment, as shown in FIG. 7A, a protrusion 59 that partially surrounds the outer periphery of the operating lever 49 is extended,
Further, as shown in FIG. 3B, the amount of protrusion to the front side is increased. As a result, the operating lever 49 is not applied to the chain double-dashed line 60 formed by the ridge 59 and the apex of the raised portion 19, so that the operating lever 49 is prevented from being inadvertently pressed as in the above-described embodiments. Therefore, it is possible to prevent useless strobe charging.

In each of the above-mentioned embodiments, the lever type strobe charging switch capable of continuous charging has been described, but the present invention can be applied to a conventional strobe charging switch only for pressing operation.

[0023]

As described above, in the lens-fitted film unit of the present invention, the end of the operation button is partially surrounded on the front surface of the front cover on the side of the ridge that covers the taking lens, and the end of the operation button is removed. To the front side from the other end of the operation button, at a position near the other end of the operation button on the side remote from the ridge and at a position that does not interfere with the operation, and to the front side from the other end of the operation button. Since a protrusion is provided and the protrusion amount is such that the operation button can be housed within the line formed by the protrusion and the apex of the raised portion, when the lens-fitted film unit is placed with the front side facing downward. However, the operation button is not inadvertently pressed, and useless consumption of the dry battery can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a lens-fitted film unit of the present invention.

FIG. 2 is a perspective view showing an appearance of a film unit with a lens.

FIG. 3 is an exploded perspective view showing a configuration of a unit main body.

FIG. 4 is a front view of the vicinity of a strobe charging switch according to another embodiment.

FIG. 5 is a schematic view around a strobe charging switch according to still another embodiment.

FIG. 6 is a schematic view around a strobe charging switch according to still another embodiment.

FIG. 7 is a sectional view of an essential part of a conventional lens-fitted film unit.

[Explanation of symbols]

 12 film unit with lens 13 unit body 19 raised portion 22 strobe charge switch 49 operation lever 52, 56a, 56b protrusion 54, 57, 60 ridge 59 ridge

Claims (2)

[Claims] 1. A unit main body in which a photographic film cartridge is preliminarily loaded, and a photographing lens, a shutter mechanism, and a strobe unit are incorporated, and a raised portion which is mounted on the front surface of the unit main body and covers the periphery of the photographing lens, and the strobe unit. In the lens-fitted film unit having a front cover provided with an operation button for turning on the power source, the front end of the operation button is partially surrounded on the front side of the front cover by the raised portion, The protrusion protruding toward the front side of the portion and the other end of the operation button on the side remote from the raised portion, and is arranged at a position separated from the other end of the operation button so as not to hinder the operation. A film unit with a lens, which is provided with a protrusion protruding to the front side. 2. The projection amount of the projection is set to a height at which the operation button is housed inside a line connecting the apex of the projection and the apex of a raised portion that surrounds the periphery of the photographing lens. Item 1. A film unit with a lens according to item 1.