JPH11133495A - Film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the entering of foreign matter into a unit main body from a shutter button part. SOLUTION: A shutter button 50 is of a single substance part provided with a supporting part 51, an arm part 52 freely elastically deformed and a button part 53 depress-operated at the time of executing photographing, as one body. A rib 54 projected in a horizontal direction is provided all around the periphery of the button part 53. While the button part 53 is not depressed, the top surface of the rib 54 comes into close contact with a receiving part 55, to close a gap around the button part 53. The rib 54 and the receiving part 55 are constituted to make the width A of the close contact surface <=1 mm, so that the danger of catching the foreign matter between the rib 54 and the receiving part 55 is extremely little. The arm part 52 is provided to form a gap 56 between a cover member for covering the top surface of the arm part 52 and it. The foreign matter intruded onto the arm part 52, at the time of depressing the button part 53 is never retained in the gap 56, not to be caught between the arm part 52 and the cover member. Thus, the fact that a film unit is left standing in a state where the gap is formed around the button part 53 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a shutter button of a film unit with a lens.

[0002]

2. Description of the Related Art At present, a great number of types of cameras for photographing are sold according to their uses and functions. Recently, a film unit with a lens has been manufactured and sold so that photographing can be easily enjoyed. A film unit with a lens is a unit that incorporates a photographic mechanism, such as a photographic lens and shutter device, with an unexposed photographic film built in beforehand. It is widely used because of its simplicity that it only needs to be sent to a developing dealer.

The film unit with a lens has an advantage that it can be provided at a low price, and has a very simple configuration because it needs to be manufactured at the lowest possible cost. For example, as shown in FIG. 9, the shutter button 2 is provided so as to be elastically movable by forming a notch 4 in the upper wall of the unit main body 3 in the shape of the shutter button 2. On the lower surface of the shutter button 2, a release arm 5 for activating a shutter mechanism is integrally provided. When the shutter button 2 is depressed, the release arm 5 moves rightward in the figure, and presses a locking lever (not shown) that locks the shutter blade (not shown) at the closed position. Release the lock. As a result, the shutter blades open and close instantaneously.

[0004]

However, in the shutter button 2 configured as described above, there is a problem that foreign matters such as sand and dust easily enter the unit main body 3 from the notch 4 portion. Below the shutter button 2, a shutter mechanism and a wind-up knob for rotating the film when the film is wound up are arranged. Therefore, if foreign matter enters from the cut 4, malfunction of each mechanism is caused. In particular, the malfunction of the shutter mechanism directly leads to the deterioration of photographic properties, so that invasion of foreign matter into the shutter mechanism must be absolutely avoided.

In general cameras such as compact cameras, as shown in FIG. 10, a shutter button 6 manufactured as a single component is incorporated by being exposed through an opening 8 formed in a camera body 7 and a shutter button 6 is provided. In some cases, a rib 9 protruding in the horizontal direction is integrally provided on the peripheral edge of the camera body 7 so that the rib 9 and the inner wall of the camera body 7 are overlapped on the outer peripheral portion of the opening 8. According to this method, the gap between the shutter button 6 and the opening 8 is closed, so that entry of foreign matter into the camera body 7 is prevented.

On the other hand, the shutter button 6
Since the overlapping surface between the inner wall of the camera body 7 and the rib 9 is formed in a horizontal direction, foreign matter is easily caught in the overlapping surface when the shutter button 6 is pushed in, and the shutter button 6
May not be returned to the initial position where the rib 9 abuts against the inner wall of the camera body 7. If the shutter button 6 is not returned to the initial position, the shutter button 6 is left with a gap around it, so that the dustproof effect in the camera body 7 is reduced.

As described above, since a film unit with a lens is provided at a low price, it can be easily used by many people, but is easily handled in a rough manner. For example, sand and dust in a beach or a construction site. It is used without any special attention even in a bad environment. For this reason, when the shutter button 6 is used for a film unit with a lens,
The risk of foreign matter being caught between the rib 9 and the inner wall of the unit body is higher than that of a compact camera, and the dustproof effect cannot be expected much.

The present invention has been made in view of the above circumstances, and has as its object to provide a film unit with a lens that prevents foreign substances from entering the unit main body from a shutter button portion.

[0009]

In order to achieve the above object, a film unit with a lens according to the present invention comprises a shutter button formed separately from a cover member, and a shutter fixed to the body base or the cover member. A molded part having an elastically deformable flexible portion extending from the support portion and a pressing operation portion connected to one end of the flexible portion and exposed on the surface of the cover member through an opening formed in the cover member. The outer peripheral end surface of the pressing operation portion and the inner peripheral end surface of the opening are formed on an inclined surface inclined at the same angle, and when the shutter button is not pressed, the outer peripheral end surface of the pressing operation portion is in close contact with the inner peripheral end surface of the opening. It is something to do.

In the film unit with a lens according to the present invention, the shutter button is formed separately from the cover member.
A support portion fixed to the main body base or the cover member, an elastically deformable flexible portion extending from the support portion, and exposed to the surface of the cover member through an opening formed in the cover member and connected to one end of the flexible portion. When the shutter button is not depressed, the peripheral portion of the pressing operation portion and the peripheral portion of the opening are in close contact with each other over the entire periphery, and the pressing operation portion and the opening May have a width of 1 mm or less.

A rib protruding in the horizontal direction may be provided on the entire outer peripheral end surface of the pressing operation portion, and the upper surface of the rib may be brought into close contact with the peripheral edge of the opening. In this case, it is preferable that an inclined surface is formed on the inner peripheral end surface of the opening, and the upper corner portion of the rib is brought into close contact with the inclined surface.

[0012] Further, a contact portion whose tip is raised upward is provided on the entire outer peripheral end surface of the pressing operation portion, and the contact surface of the contact portion is brought into close contact with the peripheral edge of the opening. Is also good. In this case, it is preferable that the distal end surface of the contact portion has a curved surface that is convex toward the periphery of the opening.

In any of the above-mentioned lens-fitted film units, it is preferable that the flexible portion is provided separately from the inner wall surface of the cover member that covers the upper surface thereof.

[0014]

FIG. 4 shows the appearance of a film unit with a lens embodying the present invention. The lens-fitted film unit 10 is configured by winding an exterior label 12 around the center of a unit body 11. The unit body 11 is mainly made of plastic, and has a photographing lens 13 and a finder objective window 14 on the front surface, a winding knob 16, a film counter window 17, and a button portion 43 of a shutter button described later on the upper surface, and a rear surface on a rear surface. Are provided with finder eyepiece windows 18, respectively. The label 12 is for making the appearance of the lens-fitted film unit 10 beautiful, and its surface is subjected to cosmetic printing. The required part of the label 12 includes the unit body 1
A photographing lens 13 and a finder objective window 1
4, an opening for exposing the film counter window 17 and the finder eyepiece window 18 to the outside is provided.
The photographing operation can be performed while the label 12 is wound around the unit main body 11.

As shown in FIG. 5, the unit body 11 comprises:
It comprises a main body base 21 and a front cover 22 and a rear cover 23 that cover the front and rear of the main body base 21. The main body base 21 is integrally provided with a cartridge chamber 25 for accommodating the cartridge main body 24 on both sides and a film roll chamber 27 for accommodating the unexposed photographic film 26 in a roll shape. Is
An aperture 28 for defining an exposure range for the photographic film 26 is formed. The winding knob 16 is attached to the upper surface of the cartridge chamber 25.

An exposure unit 30 is attached to the front of an aperture 28 in the main body 21 and is sandwiched between a front cover 22 and a rear cover 23. The exposure unit 30 is a unit obtained by integrally assembling a photographing lens 13, a finder optical system, a film winding mechanism, a shutter mechanism, and the like on a shutter base 30a, and has a finder objective lens 31a, a finder eyepiece lens 31b, and a film on the upper part. The counter board 32 is attached and fixed by the top plate 33. A shutter button 40 is mounted on the upper surface of the exposure unit 30.

The front cover 22 has a lens opening 35 and a finder objective window 14, and the rear cover 23 has a finder eyepiece window 18 and an opening 36, respectively. Also,
The film counter window 17 and the exposure opening 37 are formed so as to straddle the front cover 22 and the rear cover 23.
Then, the taking lens 13 assembled in the exposure unit 30 is from the lens opening 35, the objective lens 31a and the eyepiece 31b are from the finder objective window 14 and the finder eyepiece window 18, and the film counter board 32
Are exposed from the film counter window 17, respectively. Further, a part of the winding knob 16 projects from the opening 36.

As shown in FIG. 1, the shutter button 40 is a molded part integrally provided with a support portion 41, an elastically deformable arm portion 42, and a button portion 43 which is pressed and operated during photographing. A release arm 44 for operating a shutter mechanism is provided on the lower surface of the shutter 42. The shutter button 40 has a button portion 43 that has a front cover 22.
The supporting portion 41 is fixed on the top plate 33 of the exposure unit 30 so as to face the exposure opening 37 formed over the rear cover 23. Note that the support portion 41 is not necessarily fixed on the top plate 33, and may be fixed anywhere in the unit body 11 as long as the button portion 43 can be positioned so as to face the exposure opening 37.
For example, it may be fixed to the inner walls of the front cover 22 and the rear cover 23.

When the button portion 43 is pushed in for photographing, the arm portion 42 is bent and the release arm 44 moves rightward in the drawing, and presses a locking lever (not shown) assembled to the exposure unit 30. I do. This releases the locking of the shutter blades (not shown) at the closed position,
The shutter blades open and close instantaneously.

As shown in FIG. 2, inclined surfaces 38 and 45 inclined at the same angle are formed on the inner peripheral end surface of the exposure opening 37 and the outer peripheral end surface of the button portion 43, respectively. When not operated, the slope 3
8 and the inclined surface 45 are in close contact with each other.

As shown in FIG. 3, the shutter button 4
The reference numeral 0 denotes an inclined shape such that the button portion 43 projects further upward than the upper walls of the front cover 22 and the rear cover 23 when in the natural state. Then, when the front cover 22 and the rear cover 23 are put on the upper surface of the shutter button 40, the arm portion 42 bends and the button portion 43 is elastically urged toward the exposure opening 37, and the inclined surface 38 and the inclined surface 45 are separated. Make sure they adhere.

In the film unit with lens 10 constructed as described above, the button portion 4 of the shutter button 40
3 and the inner peripheral end surface of the exposure opening 37 are in close contact with each other, and the gap around the button portion 43 is closed. Foreign matter does not enter the unit body 11 from around the button portion 43.

Also, inclined surfaces 38 and 45 are formed on the outer peripheral end surface of the button portion 43 and the inner peripheral end surface of the exposure opening 37, and the contact surface between the button portion 43 and the exposure opening 37 is formed in an inclined surface shape. Therefore, even if foreign matter enters the gap formed between the button part 43 and the exposure opening 37 during the pressing operation of the button part 43, this foreign matter is not removed by the inclined surface 4 of the button part 43.
5 slides down into the unit body 11. As a result, the film unit with lens 10 is
No foreign matter is caught in the contact surface between the opening 43 and the exposure opening 37, and is left in a state where a gap is formed around the button portion 43, so that entry of the foreign matter into the unit body 11 is reliably prevented. . Since the pressing operation of the button unit 43 is performed only instantaneously at the time of photographing, the amount of foreign matter that slides down into the unit main body 11 at this time is very small. Therefore, the risk of malfunction of the photographing mechanism due to foreign matter sliding down into the unit main body 11 is extremely low.

FIG. 6 shows a second configuration example of the shutter button portion of the film unit with a lens according to the present invention. The same members as those shown in FIGS. 1 to 3 are denoted by the same reference numerals. It is attached. The shutter button 50 is
It is a molded part integrally provided with a support portion 51, an elastically deformable arm portion 52, and a button portion 53 that is pressed and operated during photographing. A release arm 44 for operating a shutter mechanism is provided on a lower surface of the arm section 52.

On the peripheral surface of the button portion 53, a rib 54 protruding in the horizontal direction is provided over the entire periphery. Also,
A concave receiving portion 55 is formed over the entire periphery of the inner periphery of the exposure opening 37. Shutter button 50
Indicates that when the button unit 53 is in the natural state,
The rib 54 is elastically urged to the side 7, and the rib 54 is in close contact with the receiving portion 55. Note that the rib 54 and the receiving portion 55 are configured such that the width A of their contact surfaces is 1 mm or less.
The arm portion 52 is inclined so as to form a gap 56 between the rear cover 23 covering the upper surface thereof and the inner wall surface of the front cover.

The shutter button 50 includes a button section 5
Since the peripheral portion of the button 3 and the peripheral portion of the exposure opening 37 are in close contact with each other over the entire periphery, the gap around the button portion 53 is completely closed, and no foreign matter enters the unit main body from here.

By setting the width A of the contact surface between the rib 54 and the receiving portion 55 to 1 mm or less, the risk of foreign matter being caught between them is extremely reduced. Further, by forming the gap 56 above the arm 52, foreign matter that has entered the arm 52 when the button 53 is pressed is retained in the gap 56, and the arm 52, the rear cover 23, and the front cover It will not be caught between the inner wall surface of the vehicle. Thus, the button 53 is not left in a state where a gap is formed around the button 53.

In the above-described second embodiment, the rib 54 and the receiving portion 55 are configured to be overlapped face to face and adhere to each other. However, as shown in FIG. The surface 57 may be formed, and the corner 54 a on the upper surface side of the rib 54 may be brought into contact with the inclined surface 57. According to this, the width of the contact surface between the rib 54 and the inclined surface 57 becomes extremely narrow, and it is possible to reliably prevent foreign matter from being caught.

As shown in FIG. 8, on the peripheral surface of the button portion 53, a contact portion 58 having a tip portion 58a rising upward is provided over the entire circumference, and the tip surface 58b of the contact portion 58 is provided. The receiving portion 55 may be brought into contact with the receiving portion 55. According to this embodiment, the peripheral surface of the button 53 and the opening 3
Even if a foreign substance enters the gap between the inner peripheral surface of the button 7 and the inner peripheral surface, the foreign substance is formed between the peripheral surface of the button portion 53 and the tip end portion 58a of the contact portion 58 that is raised upward. Groove 5
9 and does not fall into the unit body when the button 53 is pressed. It is preferable that the distal end surface 58b of the contact portion 58 be a curved surface that is convex toward the receiving portion 55 in order to reduce the width of the contact surface with the receiving portion 55.

In each of the above embodiments, an example in which the present invention is applied to a lens-equipped film unit having only a basic photographing mechanism has been described. The present invention can be applied to a strobe charge switch unit for operating a circuit. Also,
The present invention can be applied to any camera having a push-in switch unit.

[0031]

As described above, according to the film unit with the lens of the present invention, the shutter button is formed separately from the cover member, and when the shutter button is not depressed, the shutter button pressing operation section is not operated. Of the opening for exposing the pressing operation portion formed in the cover member, the gap around the pressing operation portion is closed, and foreign matter can enter into the unit body from here. Is prevented.

Further, since the outer peripheral end surface of the pressing operation portion and the inner peripheral end surface of the opening are formed as inclined surfaces inclined at the same angle, a gap formed between the pressing operation portion and the opening when the shutter button is pressed. Even if a foreign object enters the unit, the foreign object slides down along the inclined surface into the unit body. As a result, the lens-fitted film unit of the present invention can prevent the foreign object from being caught in the contact surface between the pressing operation unit and the opening, and not being left with a gap formed around the pressing operation unit. Intrusion of foreign matter into the device is reliably prevented. Since the pressing operation of the pressing operation unit is performed only instantaneously at the time of photographing, the amount of foreign substances sliding down into the unit body at this time is very small. Therefore, the risk of malfunction of the photographing mechanism due to foreign matter sliding down into the unit body is extremely low.

When the shutter button is not depressed, the peripheral portion of the pressing portion and the peripheral portion of the opening are in close contact over the entire circumference, and the width of the contact surface between the pressing portion and the opening is 1 mm or less. With such a configuration, the foreign matter is prevented from entering the unit main body from around the pressing operation portion, and the danger of the foreign material being caught between the pressing operation portion and the opening is extremely reduced.

Further, the flexible portion is provided so as to be separated from the inner wall surface of the cover member which covers the upper surface thereof, and a gap is formed between the flexible portion and the inner wall surface of the cover member, so that the pressing operation portion is formed. Even if foreign matter enters the flexible part during the pushing operation, the foreign matter remains in the gap between the flexible part and the cover member. This prevents foreign matter from being caught between the flexible portion and the cover member and left in a state where a gap is formed around the pressing operation portion.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a shutter button incorporated in a film unit with a lens according to the present invention.

FIG. 2 is a sectional view of a main part showing a state where the shutter button shown in FIG. 1 is assembled.

FIG. 3 is a schematic diagram showing a shape of a shutter button shown in FIG.

FIG. 4 is an external view of a film unit with a lens according to the present invention.

FIG. 5 is an exploded perspective view of the unit main body shown in FIG.

FIG. 6 is a schematic diagram showing a second configuration example of the shutter button of the present invention.

FIG. 7 is a sectional view of a main part showing a third configuration example of the shutter button of the present invention.

FIG. 8 is a sectional view of a main part showing a fourth configuration example of the shutter button of the present invention.

FIG. 9 is a schematic view showing a configuration of a shutter button portion of a conventional film unit with a lens.

FIG. 10 is a sectional view of a main part showing a configuration of a conventional shutter button portion used in a compact camera.

[Explanation of symbols]

 Reference Signs List 10 Film unit with lens 11 Unit main body 2, 6, 40, 50 Shutter button 22 Front cover 23 Rear cover 37 Exposure opening 38, 45, 57 Inclined surface 41, 51 Support portion 42, 52 Arm portion 43, 53 Button portion 54 Rib 55 receiving part 56 gap 58 contact part 59 groove part

Claims (7)

[Claims] 1. A film unit with a lens, wherein a cover member is put on a base portion of a main body to which a photographing mechanism is assembled, and a shutter button exposed on a surface of the cover member is pressed to operate the photographing mechanism. The shutter button is formed separately from the cover member, and is fixed to the main body base or the cover member, an elastically deformable flexible portion extending from the support portion, and one end of the flexible portion. A molded part having a pressing operation portion exposed to the surface of the cover member through an opening formed in the cover member, the outer peripheral end surface of the pressing operation portion and the inner peripheral end surface of the opening having the same angle. When the shutter button is not depressed, the outer peripheral end surface of the pressing operation portion is in close contact with the inner peripheral end surface of the opening. Film unit, characterized in that the the like. 2. A film unit with a lens, wherein a cover member is put on a base portion of a main body to which a photographing mechanism is attached, and a shutter button exposed on a surface of the cover member is pressed to operate the photographing mechanism. The shutter button is formed separately from the cover member, and is fixed to the main body base or the cover member, an elastically deformable flexible portion extending from the support portion, and one end of the flexible portion. A molded component having a pressing operation portion exposed to the surface of the cover member through an opening formed in the cover member and connected to the peripheral portion of the pressing operation portion when the shutter button is not pressed. The peripheral portion of the opening is in close contact with the entire periphery, and the width of the contact surface between the pressing operation portion and the opening is 1 mm or less. Lens-fitted photo film unit to be. 3. A lens with a lens according to claim 2, wherein a rib protruding in the horizontal direction is provided on the outer peripheral end surface of the pressing operation portion over the entire circumference, and the upper surface of the rib is brought into close contact with the peripheral edge of the opening. Film unit. 4. An inclined surface is formed on an inner peripheral end surface of the opening,
4. The lens-fitted film unit according to claim 3, wherein the upper surface side corner of the rib is brought into close contact with the inclined surface. 5. An abutting portion whose leading end is raised upward is provided on the entire outer peripheral end surface of the pressing operation portion, and the leading end surface of the abutting portion is brought into close contact with the peripheral edge of the opening. The lens-fitted film unit according to claim 2, wherein: 6. The lens-fitted film unit according to claim 5, wherein a front end surface of the contact portion has a curved surface protruding toward a periphery of the opening. 7. The lens-fitted film unit according to claim 1, wherein the flexible portion is provided separately from an inner wall surface of the cover member that covers an upper surface thereof.