JP2005099385A - Lens-fitted photo film unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide lens-fitted photo film units capable of housing batteries of different sizes, respectively, inexpensively. <P>SOLUTION: A lens-fitted photo film unit 12 is fabricated by attaching an exposure unit 26, a flash unit 27, etc., to a main body portion 29 and fixing a front cover 30 and a rear cover 31. The main body portion 29 has supporting projections 35, 36 formed integrally therewith. The flash unit 27 has a positive contact member 48 and a negative contact member 49 connected thereto. When a shorter battery 66 is housed in the lens-fitted photo film unit 12, the battery 66 is nipped between the positive contact member 48 and the negative contact member 49 by way of a connection member 70, and then the battery 66 is held between the supporting projections 35, 36. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lens-fitted photo film unit that stores two different types of batteries.

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.

  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.

  Therefore, in Patent Document 1, the structure of the unit body of the lens-fitted photo film unit includes a lens barrel unit for holding a photographing lens and the like, a cartridge chamber for storing the cartridge, and a scroll chamber for winding the 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. We are trying to reduce the size of the lens-fitted photo film unit.

JP-A-10-254033

  As described above, recently, it has been strongly desired to use a smaller battery, and an AA type battery smaller than an AA type, or a small dry cell having a size different from the conventional standard, is used for a film unit with a lens. It is considered to reduce the environmental load and improve the efficiency of component placement inside the lens-fitted photo film unit to reduce the size.

  However, there are various types of lens-fitted photo film units, and depending on the model, there is a desire to use AA batteries as usual. If it is newly formed by molding or the like, the cost will be greatly increased, and the low cost of the lens-fitted film unit will be hindered.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a low-cost film unit with a lens that can store two types of batteries having different dimensions while using common components. It is what.

  In order to achieve the above object, in the film unit with a lens of the present invention, a cartridge chamber, a film roll chamber, an aperture located between the cartridge chamber and the film roll chamber, and the cartridge chamber and the film roll chamber are provided. And a light emitting circuit, a power feeding circuit for supplying power to the light emitting circuit, and a light emitting part that emits light by the light emitting circuit on a circuit board. In a film unit with a lens comprising a strobe unit that is mounted and integrated, a power source battery that is a power source of the strobe unit, and a pair of electrode contact pieces that electrically connect the power feeding circuit and the power source battery, As the power battery, a cylindrical first battery, and a cylindrical battery having a shorter axial length than the first battery. When either one is used and the first battery is incorporated, both the electrodes of the first battery are held between the pair of electrode contact pieces, and the first battery is interposed between the holding projections. When holding and fixing to the base of the main body and incorporating the second battery, a connecting member that fills a gap between one of the electrode contact pieces and one end of the second battery and has conductivity And holding the second battery between the holding protrusions and fixing the second battery to the base of the main body while holding the second battery between the pair of electrode contact pieces via the connection member. And In addition, it is preferable to use a member having an elastic force as the connection member.

  In the lens-fitted photo film unit according to the present invention, as the power source battery, one of a cylindrical first battery and a cylindrical battery having a shorter axial length than the first battery is used. When the first battery is incorporated, both the electrodes of the first battery are held between the pair of electrode contact pieces, while the first battery is held between the holding projections, When the second battery is built in, the electrode contact member that contacts one electrode of the second battery and is electrically connected to the strobe unit, and the holding projection A spacer is provided to fill a gap between one electrode contact member and the electrode contact member, the electrode contact member is sandwiched between the spacer and the one electrode, and the other electrode contacts one of the electrode contact pieces. While the second battery and the It holds the p o between the retaining projections, characterized in that fixed to the body base.

  Alternatively, in the lens-fitted photo film unit of the present invention, as the power source battery, one of a cylindrical first battery and a cylindrical battery having a second axial length shorter than that of the first battery is used. When the first battery is incorporated, both the electrodes of the first battery are held between the pair of electrode contact pieces, while the first battery is held between the holding projections, When the second battery is built-in, the negative electrode provided on one end side of the second battery and one of the electrode contact pieces are brought into contact with each other and are continuously from the other end of the second battery. While fixing the second battery to the electrode contact piece by welding the positive electrode provided on the cylindrical surface and the other of the electrode contact piece while peeling off the coating formed on the surface of the second battery, The main body base is configured to hold the second battery between the holding protrusions. Wherein the fixing.

  FIG. 1 is an external perspective view showing a lens-fitted photo film unit, and FIG. 2 is an exploded perspective view thereof. In this embodiment, it is possible to assemble two types of lens-fitted photo film units 11 and 12 that match two types of batteries having different dimensions. Below, for convenience of explanation, the first lens-fitted photo film unit 11 that uses a large battery as a power source will be described first.

  The first lens-fitted photo film unit 11 includes a unit main body 15 in which various photographing mechanisms are incorporated, and an exterior label sheet 16 that partially covers the unit main body 15. On the front surface of the unit main body 15, a photographing lens 17, an objective-side finder window 18, a strobe light emitting unit 19, a strobe charge changeover switch 20, and the like are provided. A release button 21, a counter window 22 for displaying the number of remaining frames that can be photographed, and a light guide 23 for strobe charge display are formed on the upper surface of the unit body 15. Further, a winding knob 24, an eyepiece finder window, and the like are exposed on the back side of the unit body 15.

  As shown in FIG. 2, the unit main body 15 includes a main body base 29 in which an exposure unit 26, a strobe unit 27, a counter mechanism and the like are incorporated, a front cover 30 attached to cover the front and rear of the main body base 29, and a rear cover 31. The front cover 30 is formed with openings for exposing the photographing lens 17, the objective-side finder window 18, the strobe light emitting unit 19, the strobe charge changeover switch 20, and the like.

  The main body base 29 is integrally formed with a cartridge chamber 32 and a film roll chamber 33 on the left and right, an aperture 34 (see FIG. 3) positioned therebetween, and holding projections 35 and 36 described later. An exposure unit 26 is provided in front of 34.

  As shown in FIG. 3, the holding projection 35 is located between the cartridge chamber 32 and the film roll chamber 33 and below the aperture 34, and protrudes forward. The holding projection 36 is positioned adjacent to the film roll chamber 33 and below the aperture 34.

  A strobe unit 27 is attached between the exposure unit 26 and the film roll chamber 33 by claw coupling. The cartridge chamber 32 and the film roll chamber 33 are loaded with a film cartridge 37 and a film roll 38a in which a photographic film 38 is rolled. A winding knob 24 is rotatably disposed at the upper portion of the cartridge chamber 32, and a shaft member integrally provided at the lower portion thereof is engaged with a spool 37a of a film cartridge 37 accommodated in the cartridge chamber 32. By rotating the winding knob 24 counterclockwise in the drawing, the photographed photographic film 38 is wound up in the film cartridge 37.

  The rear cover 31 is attached so as to cover the back surface of the main body base 29, and forms a film feeding path from the film roll chamber 33 through the back of the aperture 34 to the cartridge chamber 32 with the main body base 29. To do. The photographic film 38 is accommodated in the film cartridge 37 loaded in the cartridge chamber 32 from the film roll chamber 33 through the film feeding path. Further, bottom covers 31a and 31b are formed at the bottom of the rear cover 31, and the bottoms of the cartridge chamber 32 and the film roll chamber 33 are light-tightly closed by these bottom covers 31a and 31b. The rear cover 31 closes the back of the main body base 29 in a light-tight manner, thereby forming a light shielding space 39 (see FIG. 4).

  As shown in detail in FIG. 3, the strobe unit 27 is a unit obtained by assembling a strobe light emitting unit 19, a main capacitor 41, a sync switch 42, and the like on a circuit board 40. Furthermore, although not shown in detail in the circuit board 40, a light emitting circuit for emitting light from the strobe light emitting unit 19 and a power feeding circuit for supplying power to the light emitting circuit are mounted. Further, the circuit board 40 is formed with an engagement hole 40 a that engages with an engagement claw 29 a formed in the main body base 29.

  In the strobe unit 27, when the strobe charge changeover switch 20 is slid upward, the metal contact 43 provided on the front surface of the circuit board 40 is turned on and the power supply circuit is turned on. Charging starts. Further, the strobe unit 27 causes the synchro switch 42 to be short-circuited by a shutter blade (not shown) that rotates when the shutter mechanism is operated, so that the light emitting circuit is turned on to emit strobe light. Yes.

  A positive electrode contact piece 48 and a negative electrode contact piece 49 are attached to one end of the circuit board 40. The positive electrode contact piece 48 and the negative electrode contact piece 49 are entirely bent by a metal plate, fixed to the circuit board 40 by engagement and soldering, and are attached to the positive electrode terminal 52 and the negative electrode terminal 53 of the first battery 50. Contact each other. When the battery 50 is attached to the positive electrode contact piece 48 and the negative electrode contact piece 49, the battery 50 and the power feeding circuit are electrically connected.

In the present embodiment, the first battery 50 used for the first lens-fitted photo film unit 11 uses a conventional standard, for example, an AA type battery. As shown in FIG. 4, the dimensions of the positive electrode contact piece 48 and the negative electrode contact piece 49 are formed in accordance with the dimensions of the battery 50, and the contact portion 48 a of the positive electrode contact piece 48 that contacts the positive electrode terminal 52 and the negative electrode terminal. The distance L _D1 of the contact portion 49 a of the negative electrode contact piece 49 that contacts the contact hole 53 is formed in accordance with the axial length L ₁ of the battery 50.

  The details of the periphery of the battery 50 inside the lens-fitted photo film unit 11 are as shown in FIG. That is, the battery 50 is sandwiched from both ends by the elastic force of the positive electrode contact piece 48 and the negative electrode contact piece 49 and fixed to the main body base 29 together with the strobe unit 27. Further, the holding projections 35 and 36 are in contact with the positive electrode contact piece 48 and the negative electrode contact piece 49, respectively. As a result, the battery 50 is held between the holding projections 35 and 36 and is fixed between the cartridge chamber 32 and the film roll chamber 33 and at a position below the aperture 34.

  Next, the configuration of the second lens-fitted film unit 12 that shares parts with the first lens-fitted photo film unit 11 and uses a battery smaller than the battery 50 as a power source will be described. Note that the second lens-fitted photo film unit 12 that uses the same parts and members as those of the first lens-fitted photo film unit 11 will be described using the same reference numerals.

In the second lens-fitted photo film unit 12 according to the present invention, as shown in FIG. 5, the axial length L ₂ is larger than the axial length L ₁ of the first battery 50 instead of the first battery described above. A short second secondary battery 66 is used. In the present embodiment, a dedicated battery having a shorter axial length than the AA battery is used as the second battery 66.

  As shown in FIG. 6, the unit main body 62 of the second lens-fitted photo film unit 12 includes a main base 29, an exposure unit 26, a counter mechanism, a strobe unit 27, etc., a second battery 66, and a later-described unit. A connecting member 70 is incorporated, and a front cover 30 and a rear cover 31 are attached so as to cover the front and back of the main body base 29.

The connection member 70 is formed by press molding or the like from a conductive metal plate. In the strobe unit 27, as described above, the distance L _D1 between the contact portion 48a of the positive electrode contact piece 48 and the contact portion 49a of the negative electrode contact piece 49 is formed in accordance with the axial length L ₁ of the first battery 50. Therefore, when one of the positive terminal 67 and the negative terminal 68 of the second battery 66 is brought into contact, a gap is generated between the other. Therefore, in this connection member 70, when the negative electrode terminal 68 of the second battery 66 is brought into contact with the contact portion 49 a of the negative electrode contact piece 49, a gap generated between the positive electrode terminal 67 and the contact portion 48 a of the positive electrode contact piece 48. It is formed in the size according to. In addition, the connection member 70 is formed with a recess 70 a that is recessed from the center of one end surface, and the recess 70 a is fitted to the positive electrode terminal 67 of the second battery 66.

  The second battery 66 includes the positive electrode contact 48 and the negative electrode contact piece in a state where the concave portion 70a of the connection member 70 is fitted to the positive electrode terminal 67 and the second battery 66 and the connection member 70 are in series contact. 49. Accordingly, the negative electrode terminal 68 is electrically connected to the negative electrode contact piece 49 and the positive electrode terminal 67 is electrically connected to the positive electrode contact piece 48 via the connection member 70, so that power can be supplied to the power supply circuit of the strobe unit 27. Further, the second battery 66 is fixed to the main body base 29 together with the strobe unit 27. Thus, the second battery 66 is held between the holding projection pieces 35 and 36 and is fixed between the cartridge chamber 32 and the film roll chamber 33 and at a position below the aperture 34.

  The connection member 70 is preferably made of a member having elasticity. Accordingly, when the connection member 70 is sandwiched between the positive electrode contact piece 48 and the negative electrode contact piece 49 together with the second battery 66, the connection member 70 is strongly pressed against the positive electrode contact piece 48 and the positive electrode terminal 67. The holding and electrical connection of the battery 66 become stronger.

  The operation of the above configuration will be described below. When the lens-fitted film unit 11 is assembled, the exposure unit 26, the counter mechanism, and the like are incorporated in the main body base 29, and the first battery 50 is also incorporated in the main body base 26 together with the strobe unit 27. A battery 50 is held between 35 and 36. Then, the front cover 30 and the rear cover 31 are attached to form the unit main body 15, and the label sheet 16 is wound and adhered so as to go around the central portion of the unit main body 15 in a strip shape, and the first lens is attached. The film unit 11 is completed.

  On the other hand, when the second lens-fitted film unit 12 is assembled, as described above, the second battery 66 together with the connecting member 70 is sandwiched between the positive electrode contact piece 48 and the negative electrode contact piece 49 and connected to the strobe unit 27. Then, the second battery 66 is incorporated in the main body base 29 together with the exposure unit 26, the counter mechanism, and the strobe unit 27, and the second battery 66 is held between the holding protrusions 35 and 36. Then, the front cover 30 and the rear cover 31 are attached to form a unit main body 62, and the label sheet 16 is wound and adhered to the unit main body 62, whereby the second lens-fitted film unit 12 is completed.

  As described above, the lens-fitted photo film units 11 and 12 for storing the batteries 50 and 66 having different axial lengths can be assembled by sharing many parts and adding some parts. Since the second battery can be stored with only a slight change compared to when the battery is stored, it is possible to reduce the cost of the lens-fitted photo film units 11 and 12 and facilitate the manufacturing process.

  In the above embodiment, the connection member 70 that fills the gap between the positive electrode terminal 67 and the positive electrode contact piece 48 of the second battery 66 is used to hold the second battery 66 and to supply power to the strobe unit 27. However, the present invention is not limited to this, and as shown in FIG. 7, a positive electrode contact piece (electrode contact member) 75 connected to the circuit board 40 via a lead wire, Further, by using the spacer 76 that fills the gap between the positive electrode contact piece 75 and the holding projection 35, the same effect as in the above embodiment can be obtained. In addition, in FIG. 7, about the thing using the components and members similar to the said embodiment, a same sign is attached | subjected and description is abbreviate | omitted.

  The unit main body 73 of the lens-fitted photo film unit 72 shown in FIG. 7 includes a second base battery 29 in the main body base 29 together with the exposure unit 26, counter mechanism, strobe unit 74, and the like. A front cover 30 and a rear cover 31 are attached to cover the front and back of the main body base 29. In the strobe unit 74, a negative electrode contact piece 49 is attached to one end of the circuit board 40, and a positive electrode contact piece 75 is connected via a lead wire 77. That is, one end of the lead wire 77 is soldered to the positive electrode contact piece 75 and the other end is soldered to the circuit board 40. The positive electrode contact piece 75 is fixed to the spacer 76, and the spacer 76 is fixed to the holding protrusion 35. These fixations are performed by adhesion or welding. The positive electrode contact piece 75 and the negative electrode contact piece 49 of the strobe unit 74 are in contact with the positive electrode terminal 67 and the negative electrode terminal 68 of the second battery 66, respectively. When the second battery 66 is attached to the positive electrode contact piece 75 and the negative electrode contact piece 49, the second battery 66 and the power feeding circuit are electrically connected.

  Then, after the spacer 76 is assembled together with the strobe unit 74 in the main body base 29, the second battery 66 is sandwiched between the positive electrode contact piece 75 and the negative electrode contact piece 49 and fixed to the main body base portion 29. That is, the positive electrode contact piece 75 is sandwiched between the positive electrode terminal 67 of the second battery 66 and the spacer 76, and the negative electrode contact piece 49 is in contact with the negative electrode terminal 68. As a result, the second battery 66 is held between the holding projections 35 and 36 via the spacer 76 and is fixed between the cartridge chamber 32 and the film roll chamber 33 and at a position below the aperture 34. The In addition, the positive electrode contact piece 75 as an electrode contact member should just have an area sufficient to contact with the positive electrode terminal 67, and it cuts and uses only the contact peripheral part of the positive electrode contact piece 48 used in the said embodiment. Also good. Further, the circuit board 40 and the positive electrode contact piece 75 are connected via the lead wire 77. However, the circuit board 40 and the positive electrode contact piece 75 are not limited thereto. You may make it connect with the board | substrate 40 directly.

  Note that the connection between the circuit board 40 and the second battery 66 is not limited to that described above, and the second battery 66 and the positive electrode contact piece are fixed by welding as shown in FIG. You may make it connect electrically. In addition, in FIG. 8, about the thing using the components and members similar to the said embodiment, a same sign is attached | subjected and description is abbreviate | omitted.

  The unit main body 83 of the lens-fitted photo film unit 82 shown in FIG. 8 has a main body base 29 in which a second second battery 66 and a spacer 85 are incorporated together with the exposure unit 26, counter mechanism, strobe unit 84, and the like. Further, a front cover 30 and a rear cover 31 are attached so as to cover the front and rear of the main body base 29. The strobe unit 84 has a positive electrode contact piece 86 and a negative electrode contact piece 49 attached to one end of the circuit board 40. In the connection between the second battery 66 and the positive electrode terminal 86 and the negative electrode contact piece 49, the negative electrode terminal 68 and the negative electrode contact piece 49 of the second battery 66 are in contact with each other in the same manner as in the above embodiment, and the second The tip of the positive electrode contact piece 86 is welded to the cylindrical surface 66a of the battery 66. Reference numeral 88 indicates the welded portion. The cylindrical surface 66a is covered with an exterior label. However, by welding, the coating is dissolved and peeled off, and the metal case inside the coating and the positive electrode contact piece 86 are fixed and electrically connected. The The metal case welded to the positive electrode contact piece 86 is formed integrally with the positive electrode terminal 67 and is used as a positive electrode in the same manner as the positive electrode terminal 67. A spacer 85 is fixed to the holding protrusion 36. This fixing is performed by adhesion or welding. In addition, the spacer 85 is formed in a size that matches the gap between the holding projection 35 and the positive terminal 67.

  The second battery 66 is welded to the positive electrode terminal 85 while being in contact with the negative electrode contact piece 49 and is fixed to the strobe unit 84. The second battery 66 is fixed to the main body base 29 together with the strobe unit 84 and the spacer 85. That is, the positive terminal 67 contacts the spacer 85 and the negative terminal 68 contacts the negative contact piece 49. As a result, the second battery 66 is held between the holding projections 35 and 36 via the spacer 85 and is fixed between the cartridge chamber 32 and the film roll chamber 33 and at a position below the aperture 34. The The positive electrode contact piece 86 may be of a length that reaches the cylindrical surface of the second battery 66 from the circuit board 40, and is cut so as to leave only the base portion of the positive electrode contact piece 48 used in the above embodiment. May be used.

It is an external appearance perspective view of the film unit with a 1st lens. It is a disassembled perspective view of the film unit with a 1st lens. It is a perspective view which shows the structure of the strobe unit which comprises the film unit with a 1st lens, and a main body base part periphery. It is principal part sectional drawing of the film unit with a 1st lens. It is a perspective view which shows the structure of the strobe unit which comprises the film unit with a 2nd lens, and a main body base part periphery. It is principal part sectional drawing of the film unit with a 2nd lens. It is principal part sectional drawing of the film unit with a lens of 2nd Example. It is principal part sectional drawing of the film unit with a lens of 3rd Example.

Explanation of symbols

11, 12, 72, 82 Film unit with lens 27, 74, 84 Strobe unit 29 Main body base 32 Patrone chamber 33 Film roll chamber 34 Aperture 35, 36 Holding projection 40 Circuit board 48, 75, 86 Positive electrode contact 49 Negative electrode contact Piece 50,66 battery

Claims (4)

A cartridge chamber, a film roll chamber, an aperture positioned between the cartridge chamber and the film roll chamber, and two holding projections positioned between the cartridge chamber and the film roll chamber and below the aperture A main body base, a light emitting circuit, a power feeding circuit for supplying power to the light emitting circuit, a strobe unit in which a light emitting unit that emits light from the light emitting circuit is mounted on a circuit board, and a power source for the strobe unit In a film unit with a lens consisting of a power battery, and a pair of electrode contact pieces for electrically connecting the power supply circuit and the power battery,
When using any one of a cylindrical first battery and a second cylindrical battery having an axial length shorter than that of the first battery as the power battery, and incorporating the first battery, While holding both electrodes of the first battery between the pair of electrode contact pieces, the first battery is held between the holding projections and fixed to the main body base, and the second battery is built in. When connecting, the gap between one of the electrode contact pieces and one end of the second battery is filled and a conductive connection member is provided, and the second battery is connected to the pair of batteries via the connection member. A film unit with a lens, wherein the second battery is held between the holding projections and is fixed to the base of the main body while being sandwiched between electrode contacts. 2. A lens-fitted photo film unit according to claim 1, wherein a member having elasticity is used as the connecting member. A cartridge chamber, a film roll chamber, an aperture positioned between the cartridge chamber and the film roll chamber, and two holding projections positioned between the cartridge chamber and the film roll chamber and below the aperture A main body base, a light emitting circuit, a power feeding circuit for supplying power to the light emitting circuit, a strobe unit in which a light emitting unit that emits light from the light emitting circuit is mounted on a circuit board, and a power source for the strobe unit In a film unit with a lens consisting of a power battery, and a pair of electrode contact pieces for electrically connecting the power supply circuit and the power battery,
When using any one of a cylindrical first battery and a second cylindrical battery having an axial length shorter than that of the first battery as the power battery, and incorporating the first battery, While holding both electrodes of the first battery between the pair of electrode contact pieces, the first battery is held between the holding projections and fixed to the main body base, and the second battery is built in. When this is done, the electrode contact member that is in contact with one electrode of the second battery and is electrically connected to the strobe unit, and the gap between one of the holding projections and the electrode contact member are filled. The second battery and the spacer are provided with a spacer, sandwiching the electrode contact member between the spacer and the one electrode, and contacting the other electrode and one of the electrode contact pieces The main body base is held between the holding projections Film unit, characterized in that the fixing. A cartridge chamber, a film roll chamber, an aperture positioned between the cartridge chamber and the film roll chamber, and two holding projections positioned between the cartridge chamber and the film roll chamber and below the aperture A main body base, a light emitting circuit, a power feeding circuit for supplying power to the light emitting circuit, a strobe unit in which a light emitting unit that emits light from the light emitting circuit is mounted on a circuit board, and a power source for the strobe unit In a film unit with a lens consisting of a power supply battery and a pair of electrode contact pieces for electrically connecting the power supply circuit and the power supply battery,
When using any one of a cylindrical first battery and a cylindrical battery having a shorter axial length than the first battery as the power battery, and incorporating the first battery, While holding both electrodes of the first battery between the pair of electrode contact pieces, the first battery is held between the holding projections and fixed to the main body base, and the second battery is built in. In this case, the negative electrode provided on one end of the second battery is brought into contact with one of the electrode contact pieces, and the positive electrode provided on the cylindrical surface continuous from the other end of the second battery and the electrode contact are provided. The other battery is welded while peeling off the coating formed on the surface of the second battery, and the second battery is fixed to the electrode contact piece, and the second battery is attached to the holding projection. The film unit with a lens, which is held between and fixed to the base of the main body. .

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