JP2004341332A - Lens-fitted photo film unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens-fitted photo film unit with a built-in exclusive battery protected from repacking. <P>SOLUTION: A unit main body 3 of the lens-fitted photo film unit 2 comprises a main body base 19 to which an exposure device 16 and an electronic flash device 17 have been attached, and a front cover 20 and a rear cover 21 which cover the front and rear of the base 19. In the main body base 19, a cartridge chamber 22, a film roll chamber 23 and an aperture 24 are formed. The rear side faces of the chambers 22, 23 and the aperture 24 are closed up with the rear cover 21 to form a light shielding space 45. A battery 41 is built into a part under the aperture 24. In the main body base 19, protrusions 19a, 19b are formed in one body. The protrusion 19a is located near the positive pole terminal 42 of the battery 41 and has a hollow structure. The hollow 50 of the protrusion 19a communicates with the light shielding space 45. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lens-fitted photo film unit, and more particularly to a lens-fitted photo film unit incorporating a dedicated battery.
[0002]
[Prior art]
2. Description of the Related Art A lens-equipped film unit is known as a single use type simple camera preloaded with a photographic film. 2. Description of the Related Art Conventionally, an AA or AAA type standard battery is generally built in a lens-fitted photo film unit. The AA / D4 type dry batteries are mainly used as a power source for a strobe device incorporated in a lens-fitted photo film unit. In recent years, in order to reduce the environmental burden, the power saving design of the strobe circuit has progressed, and switching from a larger AA type battery to a smaller AA type battery or a smaller battery is considered. Therefore, it is desired to reduce CO ₂ emission by using such a small battery.
[0003]
As described above, the dry cell built into the lens-fitted photo film unit is larger in both dimensions and weight than other parts of the lens-fitted photo film unit, and in order to reduce the size of the lens-fitted photo film unit. It was necessary to make various arrangements for the arrangement of the dry cells.
[0004]
Therefore, in Patent Document 1, the structure of the unit body of the lens-fitted photo film unit includes a lens barrel unit that holds a photographic lens, a cartridge chamber that stores a cartridge, and a scroll chamber that winds up a film. The efficiency of component placement is improved by placing the main capacitor for the strobe on the opposite side of the dry battery, that is, the gap between the lens barrel and the scroll chamber. This makes it possible to contribute to the miniaturization of the lens-fitted photo film unit.
[0005]
By the way, the above-mentioned film unit with a lens is designed so that most of its constituent parts can be recycled, and an authorized manufacturer who has manufactured a film unit with a lens has most components including a strobe device for recycling. Parts are disassembled, cleaned and inspected before being put back into the production line. Thereby, the quality of the recycled film unit with a lens is maintained at a high quality which is not different from that of a newly manufactured lens unit with a lens.
[0006]
On the other hand, in the film unit with a lens currently on the market, a third party different from the authorized manufacturer that manufactured the unit body, on the used unit body after taking out the photographed film cartridge, There is a so-called refill product in which unused photographic film is reloaded as it is and consumable parts such as batteries are replaced with new ones for sale.
[0007]
The so-called refill products that are illegally reused by a third party different from the authorized manufacturer are sold without proper inspection and repair, and are therefore unreliable. is there. Furthermore, problems that occur in refilled products damage the reliability of the film unit with lens itself. In addition, since the above-mentioned promotion of recycling by the manufacturer is also hindered, a device for preventing the reuse of the lens-fitted photo film unit is required.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-254033 [Problems to be Solved by the Invention]
[0009]
Therefore, as a device for reducing the size of the lens-equipped film unit as described above and preventing unauthorized use of refilling, a battery dedicated to the lens-equipped film unit having a size different from that of the conventional AA, 4 and 4 standard is used. It is considered to be used. In other words, by using such a dedicated battery, the efficiency of component placement inside the lens-fitted photo film unit can be improved to enable miniaturization. Since it is difficult to do, it also prevents refilling. Furthermore, it is possible to reduce the environmental load by using a small dedicated battery.
[0010]
However, until now, it has not been considered to incorporate a dedicated battery in a lens-fitted photo film unit. Therefore, using only a dedicated battery is not sufficient as a measure for preventing refilling by a third party. Therefore, it is desired to further improve the effect of preventing refilling by devising the unit body side of the lens-fitted photo film unit combined with such a dedicated battery.
[0011]
The present invention has been made to solve the above-mentioned problems, and provides a film unit with a lens that incorporates a dedicated battery having a size different from that of a dry battery that conforms to a conventional standard and that is provided with measures to prevent refilling. It is the purpose.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, in the lens-fitted photo film unit of the present invention, a lens including a unit body in which a light-shielding space including a cartridge chamber, a film roll chamber, and an aperture is formed, and a battery serving as a power source is built in. In the attached film unit, a dedicated battery is used as the battery, and a hollow projecting portion projecting from the unit main body near at least one end of the dedicated battery and having a hollow structure inside is provided. A hollow portion formed inside the protruding portion and the light shielding space are continuously formed.
[0013]
In addition, it is preferable that the external dimensions of the dedicated battery have a substantially cylindrical shape with a diameter of 9 mm or more and 15 mm or less and an axial length of 40 mm or less. Furthermore, when the axial length of the dedicated battery is Lmm, at least a part of the hollow portion is located within a range of L + 1 mm or more and L + 15 mm or less from the other end face of the dedicated battery. It is effective. Moreover, it is also preferable that the distance from the inner wall surface of the said hollow protrusion part to the other end surface of the said exclusive battery exists in the range of L + 1mm or more and L + 15mm or less.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an external perspective view showing a lens-fitted photo film unit 2 according to the present invention, and FIG. 2 is an exploded perspective view thereof. The lens-fitted photo film unit 2 includes a unit main body 3 in which various photographing mechanisms are incorporated, and an exterior label sheet 4 that partially covers the unit main body 3. On the front surface of the unit body 3, a photographing lens 5, an objective finder window 6, a strobe light emission window 7, a strobe charge changeover switch 8 and the like are provided. A release button 11, a counter window 12 for displaying the number of remaining frames that can be photographed, and a light guide 13 for strobe charge display are formed on the upper surface of the unit body 3. Further, on the back side of the unit main body 3, a winding knob 14, an eyepiece finder window, and the like are exposed.
[0015]
As shown in FIG. 2, the unit main body 3 includes a main body base 19 in which the exposure device 16, the strobe device 17 and the like are incorporated, and a front cover 20 and a rear cover 21 that are attached so as to cover the front and rear of the main body base 19. It is configured. The front cover 20 is formed with openings for exposing the photographing lens 5, the objective-side finder window 6, the strobe light emitting unit 7, the strobe charge switch 8, and the like.
[0016]
The main body base 19 is integrally formed with a cartridge chamber 22 and a film roll chamber 23 on the left and right sides, and an aperture 24 (see FIG. 3) positioned therebetween. An exposure device 16 is provided in front of the aperture 24. It has been. A strobe device 17 is attached between the exposure device 16 and the film roll chamber 23 by claw coupling. The cartridge chamber 22 and the film roll chamber 23 are loaded with a film roll 26a in which a film cartridge 25 and a photographic film 26 are rolled. A winding knob 14 is rotatably disposed at the upper portion of the cartridge chamber 22, and a shaft member integrally provided at the lower portion thereof is engaged with a spool 25 a of a film cartridge 25 housed in the cartridge chamber 22. The photographed photo film 26 is wound up into the film cartridge 25 by rotating the winding knob 14 counterclockwise in the drawing.
[0017]
The rear cover 21 is attached so as to cover the back surface of the main body base 19, and a film feeding path 27 extending from the film roll chamber 23 through the back of the aperture 24 to the cartridge chamber 22 is provided between the rear cover 21 and the main body base 19. Form. Through this film feeding path 27, the photographic film 26 is stored from the film roll chamber 23 into a film cartridge 25 loaded in the cartridge chamber 22. Further, bottom covers 21a and 21b are formed on the bottom of the rear cover 21, and the bottoms of the cartridge chamber 22 and the film roll chamber 23 are light-tightly closed by these bottom covers 21a and 21b.
[0018]
As shown in detail in FIG. 3, the strobe device 17 is a unit obtained by assembling a strobe light emitting unit 7, a main capacitor 31, a sync switch 32, and the like on a circuit board 30. When the strobe charge changeover switch 8 is slid upward, the metal contact piece 30a provided on the circuit board 30 is turned on and charging of the main capacitor 31 is started. In the strobe device 17, the synchro switch 33 is short-circuited by shutter blades (not shown) that rotate when the shutter mechanism is operated, so that strobe light is emitted.
[0019]
A battery holder 40 composed of a positive electrode contact piece 38 and a negative electrode contact piece 39 is formed at one end of the circuit board 30, and a dedicated battery (hereinafter simply referred to as a battery) 41 is attached to supply power to the strobe circuit. The positive electrode contact piece 38 and the negative electrode contact piece 39 are entirely formed of a metal plate, are in contact with the positive electrode terminal 42 and the negative electrode terminal 43 of the battery 41, and hold the battery 41 by elasticity.
[0020]
The battery 41 used in the present embodiment is a battery dedicated to the lens-fitted photo film unit 2 and has a size different from that of a conventional standard, for example, single or four-inch batteries. Further, the shape of the positive electrode terminal 42 is a shape different from that of the battery of the conventional standard, and is a planar shape orthogonal to the axial direction of the battery 41. The outer dimensions of the battery 41 are preferably substantially cylindrical with a diameter D = 9 mm or more and 15 mm or less, and an axial length L ₁ = 40 mm or less, and the diameter D = 9 mm or more and 11 mm or less. More preferably, the length L _{1 is} 38 mm or less.
[0021]
Further, a label 44 for representing a product name, a pattern or the like is affixed to the surface of the battery 41. As shown in FIG. 3, the label 44 is a battery dedicated to a film unit with a lens. A note 44a is shown for illustration. Further, the label 44 is marked with a “+” symbol 44b for indicating the positive terminal side and a “−” symbol 44c for indicating the negative terminal side.
[0022]
Further, the dimensions of the positive electrode contact piece 38 and the negative electrode contact piece 39 constituting the battery holder 40 are formed in accordance with the dimensions of the battery 41, and the contact portion 38 a of the positive electrode contact piece 38 that contacts the positive electrode terminal 42 and the negative electrode The distance LD between the contact portions 39 a of the negative electrode contact piece 39 that contacts the terminal 43 is formed in accordance with the axial length L ₁ of the battery 1.
[0023]
Specifically, the periphery of the battery 41 in the lens-fitted photo film unit 2 is configured as shown in FIG. That is, the battery 41 is held by the battery holder 40 and fixed to the main body base 19 together with the strobe device 17 so as to be positioned below the aperture 24 and further covered with the front cover 20 and the rear cover 21.
[0024]
As described above, the main body base 19 is formed with the cartridge chamber 22, the film roll chamber 23, and the aperture 24. The rear cover 21 closes the back of the main body 19 in a light-tight manner. Is formed. Further, the main body base 19 is integrally formed with projecting portions 19 a and 19 b projecting so as to surround both ends of the battery 41, and the projecting portions 19 a and 19 b are in the vicinity of the positive terminal 42 and the negative terminal 43. And is in contact with the positive electrode contact piece 38 and the negative electrode contact piece 39.
[0025]
Of the protrusions 19a and 19b described above, the protrusion 19a located on the positive electrode terminal 42 side is a hollow protrusion having a hollow structure inside. The hollow portion 50 inside the hollow projecting portion 19a is formed so as to be continuous with the inside of the film feeding path 27 from the back side. Thus, the hollow portion 50 is a space that is continuous with the light shielding space 45.
[0026]
The hollow portion 50 is formed in a substantially rectangular shape whose horizontal cross-sectional shape is surrounded by wall surfaces 50a to 50c. The wall surfaces 50a to 50c constituting the hollow portion 50 are, for convenience of the following description, the wall surface located on the positive electrode terminal 42 side is denoted by reference numeral 50a, and the cartridge chamber is located at a position facing the wall surface 50a. The wall surface located on the 22nd side is identified by reference numeral 50b, and the wall surface connecting these is distinguished by reference numeral 50c.
[0027]
The hollow portion 50 is provided to the dimensions of the battery 41, its position, the distance from the position of the end surface of the negative electrode terminal 43 to the wall surface 50a from the position of the end face of the L _2, the negative terminal 43 to the wall surface 50b When L3 is L ₃ , L ₂ ≧ (L ₁ +1) mm, L ₃ ≦ (L ₁ +15) mm (where L ₁ = axial length of the battery 41).
[0028]
The operation of the above configuration will be described below. When the lens-fitted photo film unit 2 is collected by a third party other than the authorized manufacturer and improperly refilled, both ends of the battery 41 are held by the positive electrode contact piece 38 and the negative electrode contact piece 39 as described above. Since the hollow portion 19a is formed so as to be surrounded by the main body base 19 and protrudes from the main body base 19, the protruding portions 19a, 19b and Since the positive and negative electrode contact pieces 38 and 39 interfere with each other, it is difficult to insert a conventional standard battery.
[0029]
Further, as an unauthorized refilling method, it is conceivable to remove the hollow protrusion 19a that interferes when inserting a battery of a conventional standard by work such as cutting, but if the hollow protrusion 19a is removed, the above-described light shielding Light leaks into the space 45, and the lens-fitted photo film unit 2 becomes unusable. Alternatively, it is conceivable to block the opening after removing the hollow projecting portion 19a to shield the light. However, it takes time and effort to completely block the opening. Since it becomes easy to become complete, it is difficult to use the refill of the film unit with lens 2 again.
[0030]
In the above embodiment, the protruding portion 19a located near the positive electrode terminal 42 is formed as a hollow protruding portion so as to be continuous with the light shielding space 45. However, the present invention is not limited to this. The protrusion 19b or both the protrusions 19a and 19b may have the same structure.
[0031]
Moreover, in the said embodiment, although the hollow protrusion part 19a formed in the substantially rectangular shape is mention | raise | lifted as an example, it is not restricted to this, The hollow protrusion formed in the shape and position as shown in FIG. The part 55 may be used. In FIG. 5, the same members and components as those in the above embodiment are denoted by the same reference numerals and description thereof is omitted.
[0032]
In the hollow protrusion part 55 shown in FIG. 5, it is located in the downward part of the aperture 24 similarly to the said embodiment. Further, the rear portion of the hollow projecting portion 55 is formed to be continuous with a part of the film feeding path 27, and the side portion is formed to be continuous with the cartridge chamber 22, and a front wall extending forward from the film feeding path 27. In addition, it is formed in an “L” -shaped cross section in which a side wall extending from the cartridge chamber 22 toward the positive electrode terminal 42 side intersects. Thus, the hollow portion 56 formed inside the hollow protruding portion 55 is a space that is continuous with the cartridge chamber 22 and the film feeding path 27. Of the wall surfaces constituting the hollow portion 56, the wall surface located on the positive electrode terminal 42 side is denoted by reference numeral 56 a, the end edge of the wall surface 56 b continuing to the cartridge chamber 22 is denoted by reference numeral 56 c, and the end surface of the negative electrode terminal 43 is Assuming that the distance from the position to the wall surface 56a is L ₄ , and the distance from the position of the end face of the negative electrode terminal 43 to the end edge 56c is L ₅ , L ₄ ≧ (L ₁ +1) mm, L ₅ ≦ (L ₁ +15) It is formed to be mm (where L ₁ = the axial length of the battery 41). As a result, it is possible to prevent the insertion of a conventional standard battery as in the above embodiment. Further, when the hollow projecting portion 55 is removed, light leaks into the cartridge chamber 22 and the film feeding path in the light shielding space 45, and the lens-fitted film unit can be disabled. Can be reliably prevented.
[0033]
In the above embodiment, the description has been given by taking the substantially cylindrical dedicated battery 41 as an example. However, the shape of the dedicated battery is not limited to this, and for example, a part of the outer peripheral diameter is a thin cylindrical portion. It is also possible to use a stepped shape. Even in this case, similarly to the above-described embodiment, it is possible to obtain the same refilling prevention effect by forming the hollow projecting portion so as to project to the vicinity of the dedicated battery.
[0034]
Moreover, in the said embodiment, although the position which continues from the film feed path 27 is raised as an example as a position where a hollow protrusion part is formed, it is not restricted to this position, It forms in the unit main body 3 inside. Any position may be used as long as the position is continuous from the light-shielding space 45. Furthermore, the position in which the dedicated battery 41 is built is not limited to the position below the aperture 24 as in the above example, but what if the part of the dedicated battery 41 is close to the vicinity of the hollow protrusion. It may be in any position. If there is a hollow protrusion at a position continuous from the light shielding space 45 and the dedicated battery 41 is located in the vicinity thereof, it is possible to obtain the same refill prevention effect as in the above embodiment.
[0035]
【The invention's effect】
As described in detail above, the lens-fitted photo film unit of the present invention uses a dedicated battery as a built-in battery, projects from the unit main body near one end of the dedicated battery, and has a hollow structure inside. A hollow protrusion is provided, and since the hollow portion formed inside the hollow protrusion and the light shielding space are continuously formed, it is difficult to refill the battery, and the hollow protrusion If the film is removed, the light-shielding property becomes incomplete and unusable, so that it is possible to reliably prevent illegal refilling of the lens-fitted photo film unit.
[0036]
Furthermore, in the film unit with a lens according to claim 2, when the axial length of the dedicated battery is Lmm, at least a part of the hollow portion is within the range of L + 1 mm or more and L + 15 mm or less from the other end face of the dedicated battery. Since it is located, the hollow projecting portion is in a position where it interferes when inserting a battery of a conventional standard, which makes it more difficult to refill the battery.
[0037]
Further, in the film unit with a lens according to claim 3, since the external dimensions of the dedicated battery are substantially cylindrical shapes having a diameter of 9 mm or more and 15 mm or less and an axial length of 40 mm or less, it is further effective for preventing refilling of the battery. It has become.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a film unit with a lens.
FIG. 2 is an exploded perspective view of a lens-fitted photo film unit.
FIG. 3 is an external perspective view of a main body base and a strobe device.
FIG. 4 is a cross-sectional view of a main part of a film unit with a lens.
FIG. 5 is a cross-sectional view of a main part of a lens-fitted photo film unit to which another embodiment is applied.
[Explanation of symbols]
2 Film unit with lens 3 Unit main body 19 Main body base portions 19a, 19b, 55 Projecting portion 22 Patrone chamber 23 Film roll chamber 24 Aperture 45 Light shielding space 50, 56 Hollow portion

Claims (4)

In a film unit with a lens provided with a unit body in which a light-shielding space including a cartridge chamber, a film roll chamber, and an aperture is formed, and a battery serving as a power source is built-in,
A dedicated battery is used as the battery, and a hollow projecting portion that protrudes from the unit body to the vicinity of at least one end of the dedicated battery and has a hollow structure inside is provided inside the hollow projecting portion. A film unit with a lens, wherein the formed hollow portion and the light shielding space are continuously formed. The film unit with a lens according to claim 1, wherein the dedicated battery has a substantially cylindrical shape having an outer dimension of 9 mm to 15 mm in diameter and an axial length of 40 mm or less. When the axial length of the dedicated battery is Lmm, at least a part of the hollow portion is located within a range of L + 1 mm or more and L + 15 mm or less from the other end face of the dedicated battery. Item 3. A film unit with a lens according to item 1 or 2. 4. The lens-equipped film according to claim 1, wherein a distance from an inner wall surface of the hollow projecting portion to the other end surface of the dedicated battery is in a range of L + 1 mm or more and L + 15 mm or less. unit.

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