JP3796055B2 - Instant film pack - Google Patents

Description

【００４４】
【表２】
平面性
押上げ部材の突出量；本実施形態

【００４５】
【表３】
排出性
押上げ部材の突出量；従来

【００４６】
【表４】
排出性
押上げ部材の突出量；本実施形態

【００４７】
以上のような結果から、固着用シート５４と押圧板５５との組み合わせがフイルムユニット１４の排出性の改善に非常に効果的であることが分かる。また、押上げ部材５９，６０の突出量を低く抑えることで、ケース内のフイルムユニットの残り枚数に係わらず良好な平面性を付与できることが分かる。
【００４８】
なお、上記実施形態では、露光面とポジ像形成面とが異なる透過型のフイルムユニットを例に説明したが、露光面とポジ像形成面とが同一面とされた反射型フイルムユニットを収納するフイルムパック及びこれを使用するカメラにも適用することができる。また、フイルムパックを使用するプリンタ等にも利用することができる。更に、比較的小型なフイルムパックとこれを使用するカメラを例に説明したが、大型のフイルムパックとこれを使用するカメラにも利用することができる。
【００４９】
【発明の効果】
以上説明したように、本発明のインスタントフイルムパックは、押圧用開口をケース内から塞ぐ遮光部材を、ポリスチレンと相溶性を有するプラスチックを用いて０．３〜０．４５ｍｍの厚さの柔軟なシート状に形成され、ケースの内面に部分的に固着される固着用シートと、ポリスチレンと相溶性を有するプラスチックを用いて０．５〜１．０ｍｍの厚さの弾性を有する板状に形成され、該固着用シートに部分的に固着されるとともに、押上げ部材の押圧力をインスタントフイルムユニットに均一に伝達する押圧板とから構成したので、押上げ部材の押圧力を強くしなくても効果的に押圧板をフイルムユニットに押し付けることができ、良好な平面性と排出性とを得ることが出来る。
【００５０】
また、固着用シートは、肉盗みして強度を低下させているため、押上げ部材による押圧板の押圧を阻害することがない。更に、押圧板の端部をインスタントフイルムユニット側に向けて折り曲げ、未使用時の際に最後列のインスタントフイルムユニットと該押圧板の端部とが当接するようにしたので、押圧板によるケース内の遮光性を向上させることができる。
【００５１】
また、押上げ部材の突出量は、ケースの露光開口が設けられた面の内壁より、遮光部材の厚みとインスタントフイルムユニットの厚みとを加えた長さ分だけ背面側に寄った位置までとしたので、ケース内のフイルムユニットの残り枚数が少なくなった際でも、フイルムユニットが撓んで露光開口から突出して平面性が悪くなるようなことはない。
【図面の簡単な説明】
【図１】本発明のフイルムパックの構成を示す分解斜視図である。
【図２】本発明のカメラの外観を示す斜視図である。
【図３】カメラの構成を示す要部断面図である。
【図４】フイルムパックの外観及び排出機構の概略的構成とを示す説明図である。
【図５】未使用時のフイルムパック内部の状態を示す要部断面図である。
【図６】フイルムユニットの残枚数が１枚の際のフイルムパック内の状態を示す要部断面図である。
【符号の説明】
２ インスタントカメラ
１４ フイルムユニット
２５ フイルムパック
２６ パック室
２９ 蓋部材
３２ ケース
５４ 固着用シート
５５ 押圧板
５９，６０ 押上げ部材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an instant film pack and a camera, and more particularly to an instant film pack with improved recyclability and dischargeability and a camera with improved flatness of an instant film unit.
[0002]
[Prior art]
Various types of instant film packs (hereinafter abbreviated as film packs) in which a plurality of mono-sheet type instant film units (hereinafter abbreviated as film units) are housed in a box-shaped case are sold. The case is formed of a light-shielding plastic such as polystyrene, and is provided with an exposure opening that exposes the exposure surface of the film unit and a slit-shaped discharge opening that discharges the exposed film unit. . This film pack is used in an instant camera, a printer, or the like, and is loaded together with a case in a pack chamber provided in these devices.
[0003]
Japanese Patent Application Laid-Open No. 7-209814 discloses a film pack in which a pressing opening is formed on the back surface of the case, and the pressing of the case when the lid member is closed on the inner surface of the lid member that opens and closes the pack chamber. An invention is described in which the film unit is pressed into the opening for pressing and the flatness is imparted to the frontmost film unit facing the exposure opening, and in the film pack, the pressing is performed inside the case. In addition to incorporating a sheet-shaped light shielding member that closes the opening, the light shielding member is formed of an elastic plastic such as polycarbonate or polyarylate, and the film unit is pushed up in cooperation with the push-up member.
[0004]
Furthermore, in Japanese Patent Application No. 9-218136 filed by the present applicant, in order to improve the recycling appropriateness of the film pack case, a plastic compatible with polystyrene used for molding the case, For example, it has been proposed to form a light shielding member using a plastic such as polyphenylene ether.
[0005]
[Problems to be solved by the invention]
In each film pack described above, the central portion of the light shielding member is partially fixed to the inner wall surface of the case so that the light shielding member does not move in the case. Therefore, in order to deform the light-shielding member that is elastic and partially fixed and press the film unit, it is necessary to increase the pressing force of the lifting member, which increases the cost of the camera, There arises a problem that a strong force is required to close the lid member after loading the pack.
[0006]
Also, if the pressing force of the lifting member is too strong, when the number of film units stored in the case decreases, the pressing force by the camera lifting member and the light shielding member is less than that of the film unit. The film unit may be higher than the rigidity, and the film unit may be deformed so as to protrude from the exposure opening. According to this, since the flatness of the film unit is deteriorated, the print quality is deteriorated.
[0007]
Furthermore, in order to improve the recyclability of the film pack case, a light-shielding member that can solve the above problems is molded from a plastic that is compatible with polystyrene. You It is hoped that
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to provide a film pack and a camera that are excellent in recyclability and the flatness and discharge of a film unit.
[0009]
[Means for Solving the Problems]
In order to solve the above problems, the film pack of the present invention is formed into a flexible sheet having a thickness of 0.3 to 0.45 mm using a plastic having compatibility with polystyrene, and is partially formed on the inner surface of the case. Is formed into a plate shape having a thickness of 0.5 to 1.0 mm using a plastic having compatibility with polystyrene, and is fixed to the pressing sheet. A light shielding member is formed from a pressing plate that is partially fixed to block the pressing opening of the case and that uniformly transmits the pressing force of the lifting member to the instant film unit.
[0010]
Further, the sticking sheet is stealed to reduce the strength so that the pressing of the pressing plate by the lifting member is not hindered.
[0011]
Further, the end portion of the pressing plate is bent toward the instant film unit side so that the last-stage instant film unit and the end portion of the pressing plate abut when not in use. According to this, since the pressing plate and the fixing sheet are pressed against the inner wall of the case, the light shielding property in the case is improved.
[0012]
Furthermore, in the camera of the present invention, the amount of protrusion of the push-up member is set to the back side by the length obtained by adding the thickness of the light shielding member and the thickness of the instant film unit from the inner wall of the surface where the exposure opening of the case is provided. In this case, the flatness of the film unit when the remaining number of film units in the case is small is improved. Further, the instant film pack according to any one of claims 1 to 3 is loaded into the pack chamber for use.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 2 is a perspective view showing an appearance of a camera using the instant film pack of the present invention. The camera 2 has a substantially rectangular shape when viewed from the front side, and is loaded with a film pack containing a plurality of film units from the back side. A lens barrel 4 in which a photographing lens 3 is incorporated is provided at the center of the front surface of the camera 2. The lens barrel 4 is movable between a position where the lens barrel 4 is retracted in the camera body 5 and a position where the lens body 4 protrudes two steps to the front side with respect to the camera body 5 as indicated by a two-dot chain line in the figure. The portability of the camera 2 when not in use is improved. Below the front surface of the lens barrel 4 is provided a photometric window 6 in which a photometric element is arranged at the back.
[0014]
One side of the camera 2 is a grip 8 formed in a substantially cylindrical shape, and a strobe light emitting unit 9, a shutter button 10, and a viewfinder 11 are provided on the front surface of the grip 8. Also, a lateral position shutter button 12 is provided below the side surface of the grip 8 so that shutter release can be easily performed when the camera 2 is held in the lateral position. On the upper surface of the camera 2, a slit-shaped film outlet 15 through which the film unit 14 being developed is discharged, a counter window 16 for displaying the number of remaining shots, and a main used for turning on / off the power of the camera 2 A switch 17 and a zone focus button 18 used for setting the distance to the subject are provided. The lens barrel 4 is extended and retracted in conjunction with the operation of the main switch 17.
[0015]
In this camera 2, the distance to the subject is measured and the zone focus button 18 is operated. After confirming the shooting range with the viewfinder 11, the shutter button 10 is pressed. Then, photometry is performed through the above-described photometry window 6, and the shutter device 20 (see FIG. 4) incorporated in the lens barrel 4 performs the release operation based on the measured photometric value. When the brightness of the subject is low, strobe light emission is automatically performed from the strobe light emitting unit 9 toward the subject. After photographing, the film unit 14 under development is discharged from the film outlet 15.
[0016]
As shown in FIG. 3, which is a cross-sectional view of the main part of the camera 2, the camera 2 includes a main body base 22, and a front cover 23 and a rear cover 24 that cover the front side and the rear side of the main body base 22. Yes. The main body base 22 is configured to be attached with various photographing functional parts, a pack chamber 26 in which a film pack 25 is loaded is formed on the back side, and between the photographing lens 3 and the film pack 25 on the front side. A light-shielding cylinder 27 is provided to shield the photographing optical path of the lens barrel 4 and store the lens barrel 4 when retracted. Between the pack chamber 26 and the light-shielding tube 27, photographing is not performed. Mouth is Is formed. A plate-shaped lid member 29 that opens and closes the pack chamber 26 is attached to the rear cover 24 via a hinge 30.
[0017]
As shown in FIG. 3 and FIG. 4 showing a schematic configuration of the discharge mechanism incorporated in the camera 2 and the external shape of the film pack 25, the film pack 25 includes a box-shaped case 32 and an inside of the case 32. And a plurality of film units 14 and a film cover 33. A rectangular exposure opening 34 that exposes the exposure surface of the film unit 14 is formed on the front surface of the case 32, and the film cover 33 and the exposed film unit 14 are discharged out of the case 32 on the upper surface. A discharge port 35 is provided. When the film pack 25 is not used, the discharge opening 35 is closed by a fixing sheet 36 formed of a light-shielding plastic film, and the exposure opening 34 is closed from the inside of the case 32 by a film cover 33. ing.
[0018]
When the film pack 25 is loaded into the pack chamber 26 of the camera 2, the shutter unit 20 and the photographing lens 3 are disposed in front of the film pack 25, and is set at the exposure opening 34 for each release operation of the shutter unit 20. The film unit 14 is photographed. Further, in conjunction with the release operation of the shutter unit 20, a discharge mechanism that discharges the film unit 14 to the outside of the apparatus operates. The discharge mechanism includes a reduction gear train 39 that transmits the rotation of the motor 38 at a reduced speed, a claw mechanism 40 that operates using the driving force transmitted from the reduction gear train 39, and a developing roller pair 41.
[0019]
The claw mechanism 40 converts the rotational movement of the motor 38 transmitted by the reduction gear train 39 into a vertical sliding movement, and moves the known claw member 43 in the vertical direction. The claw member 43 enters from a lower side into a notch 44 formed at the lower front surface of the case 32 and is connected to the exposure opening 34. The claw member 43 scoops up the lower end edge of the film cover 33 or the film unit 14 in the foremost row, It is sent out of the case 32 from the outlet 35.
[0020]
The developing roller pair 41 includes a driving roller 46 that is rotated counterclockwise in the drawing by the reduction gear train 39 and a driven roller 47 that is driven by the driving roller 46 and rotates in the opposite direction to the driving roller 46. The roller 47 is pressed against the driving roller 46 with an appropriate biasing force. The developing roller pair 41 sandwiches and rotates the film cover 33 or the film unit 14 fed by the claw member 43, and conveys the film toward the film take-out port 15 of the camera 2 disposed above. Further, the developing roller pair 41 develops the film unit 14 during the conveyance of the film unit 14. Between the discharge port 35 of the film pack 25 and the developing roller pair 41, a plate-shaped spreading control member 48 that assists the development of the film unit 14 is disposed.
[0021]
FIG. 1 is an exploded perspective view showing the configuration of the film pack 25. The film unit 14 includes an exposure surface 14a on which an image is exposed by a camera, a printer, or the like, a developer pod 14b disposed above the exposure surface 14a and enclosing the developer, and a developer with the exposure surface 14a interposed therebetween. And a trap part 14c arranged to face the pod 14b. The film unit 14 is a mono-sheet type film unit that is handled as a single sheet from when it is not used until after a positive image is formed, and further, a transmissive film having a different exposed surface and a surface on which a positive image is formed. It is a unit. Therefore, the surface opposite to the exposure surface 14a is End of the statue A positive image forming surface on which a positive image is formed after completion is provided.
[0022]
When the exposure surface 14 a is exposed, the film unit 14 is sent out from the case 32 by the claw mechanism 40 and the claw member 43 described above. The film unit 14 fed out of the case 32 is sandwiched between the developing roller pair 41 and conveyed toward the outside of the apparatus. At that time, the developer pod 14b is cleaved by the pressing of the developing roller pair 41. An image receiving layer including a photosensitive layer and a reflective layer is provided between the exposure surface 14a and the positive image forming surface, and the developer flowing out from the developer pod 14b is poured between these layers. Uniformly deployed. A latent image is formed photochemically on the photosensitive layer into which the developer is poured, and this latent image is received by the image receiving layer through the reflective layer. As a result, a positive image reversed with respect to the image at the time of exposure is formed on the positive image forming surface.
[0023]
The spread control member 48 has a function of assisting the spread of the developer by slidingly contacting the positive image forming surface of the film unit 14. It is possible to obtain a print with high image quality. Excess developer is sent into the trap portion 14c. The trap portion 14c contains a pad formed of a material having good absorbability, and the developer is absorbed into the pad and solidified.
[0024]
The film cover 33 is made of a light-shielding plastic and has a thin plate shape. The film cover 33 is formed thinner than the film unit 14 so that a large load is not applied to the discharge mechanism at the time of discharge. A front end light shielding flap 50 formed of a plastic film having a light shielding property is attached to the front end portion of the film cover 33 facing the discharge port 35 of the case 32. The front end light shielding flap 50 is bent toward the film unit 14 in the case 32 and closes the central portion of the discharge port 35, so that the film cover 33 and the film are affected by an impact such as when the film pack 25 is dropped on the ground. The unit 14 is prevented from jumping out from the discharge port 35. A rear end light shielding flap (not shown) that closes the notch 44 from the inside of the case 32 is attached to a corner portion of the rear end portion of the film cover 33.
[0025]
The case 32 includes a case main body 52 formed in a box shape, a back cover 53 attached to the back side of the case main body 52 so as to close an open surface of the case main body 52, and an inner wall surface of the back cover 53. It is comprised from the sheet | seat 54 for fixation and the press plate 55 attached to. The case body 52 and the back cover 53 are formed using polystyrene.
[0026]
The back cover 53 is formed with two rectangular openings 57 and 58 along the left-right direction. In these openings 57 and 58, push-up members 59 and 60 provided on the inner surface of the lid member 29 of the camera 2 are inserted. The push-up members 59, 60 are substantially box-shaped pedestal portions 59a, 60a attached to the inner surface of the lid member 29, and a press piece that is movable along the front-rear direction of the camera 2 in the pedestal portions 59a, 60a. 59b, 60b, and leaf springs 59c, 60c for urging these pressing pieces 59b, 60b toward the front side of the camera 2, that is, into the pack chamber 26. These push-up members 59 and 60 are inserted into the case 32 from the openings 57 and 58 when the film pack 25 is loaded in the pack chamber 26 and the lid member 29 is closed. The back side is pressed to impart flatness to the frontmost film unit 14 at the position facing the exposure opening 34.
[0027]
Further, in order to prevent the film unit 14 from inadvertently moving in the case 32 on the inner surface of the back cover 53 so that a gap is not formed between the exposure opening 34 and the film cover 33, the film unit 14 is mounted. A support piece 53a pushed up toward the exposure opening 34 and an arc-shaped support rib 53b are provided upright. Since the film unit 14 is provided with a developer pod 14b and a trap part 14c that are thicker than the exposure surface 14a at both ends, the central part becomes thin and the both ends become extremely thick when a plurality of sheets are stacked. End up. However, since the support rib 53b has an arc shape that matches the shape of the film unit 14 in a state in which a plurality of sheets are stacked, the film unit 14 can be pushed up appropriately to keep the light shielding in the case 32. The support piece 53a supports the central portion of the film unit 14 arranged in the last row, and the bent portion or the crease caused by the central portion of the film unit 14 being bent in the direction opposite to the protruding direction of the support rib 53a. To prevent.
[0028]
The fixing sheet 54 and the pressing plate 55 are formed using a plastic compatible with polystyrene, for example, a plastic in which a light-shielding substance is mixed with polystyrene or polystyrene-modified polyphenylene ether, and the case 32 is recycled. At this time, the case 32 is crushed as it is without being disassembled and can be used as a new raw material.
[0029]
The fixing sheet 54 has a thickness of 0.3 to 0.45 mm and is provided with flexibility, and blocks the openings 57 and 58 of the back cover 53 from the inside of the case 32 to shield the light. The fixing sheet 54 is formed with two holes 54a and 54b and an opening 54c in the center, and caulking pins 53c and 53d provided on the back cover 53 are inserted into the holes 54a and 54b. The center part is fixed to the back cover 53 by caulking 53d. The opening 54 c is formed to project the support piece 53 a into the case 32. Further, notches 54 d and 54 e formed toward the center of the fixing sheet 54 are formed at positions where both sides of the fixing sheet 54 do not interfere with light shielding of the openings 57 and 58. These notches 54d and 54e are for reducing the strength of the fixing sheet 54 and providing further flexibility. When the openings 57 and 58 are closed with the pressing plate 55, the openings 54c and the notches 54d and 54e may face the openings 57 and 58.
[0030]
The pressing plate 55 has a thickness of 0.5 to 1.0 mm, and is given elasticity suitable for pressing the film unit 14. An opening 55a is formed at the center of the pressing plate 55 in order to avoid interference between the caulking pins 53c and 53d of the back cover 53 and the support piece 53a. The lower end edge of the pressing plate 55 and the lower end edge of the fixing sheet 54 are bonded.
[0031]
When the film pack 25 is loaded into the pack chamber 26 and the lid member 29 is closed, the push-up members 59 and 60 enter the case 32 through the openings 57 and 58. At that time, the lifting members 59 and 60 press the pressing plate 55 through the fixing sheet 54, and the pressed pressing plate 55 presses the positive image forming surface side of the film unit 14 with a uniform pressing force. As a result, the film unit 14 is pushed up toward the exposure opening 34, and planarity is imparted to the film unit 14 set in the exposure opening 34. As described above, since the elastic pressing plate 55 is fixed to the back lid 53 via the flexible fixing sheet 54, the pressing plate 55 is not displaced in the case 32, and the pressing plate 55 is not pressed. The pressing plate 55 can be pushed up toward the film unit 14 without increasing the pressing force of the raising members 59 and 60.
[0032]
The end portions of the fixing sheet 54 and the pressing plate 55 are bent toward the film unit 14 as shown in FIG. 5 when the film pack 25 is not used. The end of the pressing plate 55 is in contact with the film unit 14 so that the fixing sheet 54 and the pressing plate 55 are in close contact with the inner wall surface of the back cover 53 so that the light shielding property in the case 32 is maintained. is there. In the conventional film pack, the light shielding sheet is softly bonded to the inner wall surface of the back cover. However, since this is unnecessary, the cost of the film pack can be reduced.
[0033]
Further, the protruding amount of the pressing pieces 59b, 60b of the lifting members 59, 60 described above is such that when only one film unit 14 is accommodated in the case 32 as shown in FIG. The amount of the film unit 14 can be pressed through the pressure plate 54 and the pressing plate 55. As a result, the pressing force of the push-up members 59 and 60 when the remaining number of the film units 14 in the case 32 is reduced is weakened, so that the film unit 14 does not bend and protrude from the exposure opening 34. .
[0034]
Next, the operation of the above embodiment will be described. As shown in FIG. 5, in the unused film pack 25, the exposure opening 34 formed on the front surface of the case 32 is closed from the inside by the film cover 33, and the discharge port 35 formed on the upper surface is stuck on the outside. The light shielding sheet 36 is closed. Further, the openings 57 and 58 provided in the back cover 53 constituting the case 32 are closed by the fixing sheet 54 and the pressing plate 55. Since both ends of the fixing sheet 54 and the pressing plate 55 in the vertical direction are bent toward the film unit 14 and are in contact with the back surface of the film unit 14, the fixing sheet 54 and the pressing plate 55 are included in the back cover 53. The light shielding property in the case 32 is improved by being in close contact with the wall surface.
[0035]
When the unused film pack 25 is loaded in the pack chamber 26 of the camera 2 and the lid member 29 is closed, the push-up members 59 and 60 provided on the inner wall surface of the lid member 29 are moved to the case 32 as shown in FIG. And the pressing plate 55 is pressed through the fixing sheet 54. The pressing plate 55 uniformly presses the positive image forming surface of the film unit 14 by its own elasticity, and imparts flatness to the frontmost film unit 14.
[0036]
After the film pack 25 is loaded into the pack chamber 26, the user presses the shutter button 10 once to release the shutter, whereby the film cover 33 is discharged. Some cameras perform the discharge operation of the film cover 33 in conjunction with the closing of the lid member 29.
[0037]
After the film cover 33 is discharged, the film unit 14 is set behind the exposure opening 34. When the photographing range is confirmed with the finder 11 in this state and the shutter button 10 is pressed, the shutter unit 20 is activated and photographing is performed on the exposure surface 14 a of the film unit 14. In conjunction with the end of the release operation of the shutter unit 20, the discharge mechanism incorporated in the camera 2 starts operating.
[0038]
When the motor 38 constituting the discharge mechanism starts rotating, the rotation of the motor 38 is decelerated by the reduction gear train 39 and transmitted to the claw mechanism 40. The claw mechanism 40 converts the rotary motion of the motor 38 into a vertical slide motion, and slides the claw member 43 by one reciprocation from below to above. The claw member 43 driven by the claw mechanism 40 enters a notch 44 formed below the front surface of the case 32 from below, contacts the lower end of the film unit 14 in the width direction, and scoops upward. I'll give you. As a result, the film unit 14 is moved upward in the case 32 and discharged from the discharge port 35 to the outside of the case 32.
[0039]
The film unit 14 discharged out of the case 32 is sandwiched between the developing roller pair 41. The developing roller pair 41 cleaves the developer pod 14b of the film unit 14, and the developer flowing out from the developer pod 14b is a photosensitive layer and an image receiving layer provided between the exposure surface 14a and the positive image forming surface. Expand between. Further, the spread control member 48 is in sliding contact with the film unit 14 being conveyed and spreads the developer uniformly. The film unit 14 in which the developing solution is developed by the developing roller pair 41 and the spread control member 48 is discharged from the film take-out port 15 of the camera 2, and a positive image is formed on the positive image forming surface after a certain time.
[0040]
If shooting is continued as described above, the remaining number of film units 14 stored in the case 32 decreases, but the lifting members 59 and 60 push the film unit 14 uniformly through the pressing plate 55. The film unit 14 can always be provided with appropriate flatness. Further, since the fixing sheet 54 is thinned and the strength is reduced by the notches 54d and 54e, the pressing of the pressing plate 55 by the lifting members 59 and 60 is not hindered.
[0041]
Further, as shown in FIG. 6, the push-up members 59 and 60 can be pressed through the fixing sheet 54 and the pressing plate 55 when the remaining number of the film units 14 in the case 32 becomes one. Therefore, the film unit 14 is not pressed too much, and the flatness of the film unit 14 is not adversely affected.
[0042]
【Example】
For the present invention, the flatness and discharge performance of the film unit 14 were tested using the fixing sheet 54 and the pressing plate 55 having various thicknesses and the pushing members 59 and 60 having various protruding amounts. went. Tables 1 and 2 show the experimental results for flatness, and Tables 3 and 4 show the experimental results for discharge. Note that the protruding amounts of the push-up members 59 and 60 are those of the protruding amount up to the exposure opening, which is referred to as “conventional”, and the fixing sheet 54, the pressing plate 55, and the film unit 14 from the inner wall of the surface where the exposure opening is provided. The amount of protrusion up to the position closer to the back side by the thickness of “is this embodiment” is expressed. In addition, a mark “◯” in the table indicating the discharge property indicates that all the film units have been discharged successfully, and “×” indicates that a discharge failure has occurred. In addition, the mark “◯” in the table indicating the flatness indicates that it was within the standard at room temperature, and “x” indicates that it was out of the standard at room temperature. The standard of flatness is within a range of ± 1 mm from the focus setting position of the camera.
[0043]
[Table 1]
Flatness
Projection amount of push-up member; conventional

[0044]
[Table 2]
Flatness
Projection amount of push-up member; this embodiment

[0045]
[Table 3]
Emission
Projection amount of push-up member; conventional

[0046]
[Table 4]
Emission
Projection amount of push-up member; this embodiment

[0047]
From the above results, it can be seen that the combination of the fixing sheet 54 and the pressing plate 55 is very effective in improving the discharge performance of the film unit 14. It can also be seen that by controlling the protrusions of the push-up members 59 and 60 to be low, good flatness can be imparted regardless of the remaining number of film units in the case.
[0048]
In the above embodiment, the transmissive film unit having a different exposure surface and positive image forming surface has been described as an example. However, a reflective film unit in which the exposure surface and the positive image forming surface are the same surface is accommodated. The present invention can also be applied to a film pack and a camera using the film pack. It can also be used for a printer using a film pack. Furthermore, although a relatively small film pack and a camera using the film pack have been described as examples, the present invention can also be used for a large film pack and a camera using the film pack.
[0049]
【The invention's effect】
As described above, the instant film pack of the present invention is a flexible sheet having a thickness of 0.3 to 0.45 mm using a plastic having compatibility with polystyrene as a light-shielding member that closes the pressing opening from the inside of the case. Is formed into a plate shape having a thickness of 0.5 to 1.0 mm using a fixing sheet that is partially fixed to the inner surface of the case and a plastic that is compatible with polystyrene, Partially fixed to the fixing sheet When Both are composed of a pressing plate that uniformly transmits the pressing force of the lifting member to the instant film unit, so that the pressing plate can be effectively pressed against the film unit without increasing the pressing force of the lifting member. Good flatness and discharge can be obtained.
[0050]
In addition, since the fixing sheet steals the meat and reduces the strength, the pressing plate does not hinder the pressing plate from being pressed. Furthermore, the end of the pressing plate is bent toward the instant film unit side so that the last row of instant film units and the end of the pressing plate abut when not in use. The light-shielding property can be improved.
[0051]
Further, the amount of protrusion of the push-up member is set to the position closer to the back side by the length of the light shielding member and the thickness of the instant film unit than the inner wall of the surface provided with the exposure opening of the case. Therefore, even when the remaining number of film units in the case is reduced, the film unit does not bend and protrude from the exposure opening to deteriorate the flatness.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a configuration of a film pack of the present invention.
FIG. 2 is a perspective view showing the appearance of the camera of the present invention.
FIG. 3 is a cross-sectional view of a main part showing a configuration of a camera.
FIG. 4 is an explanatory view showing an appearance of a film pack and a schematic configuration of a discharge mechanism.
FIG. 5 is a cross-sectional view of the main part showing the state inside the film pack when not in use.
FIG. 6 is a cross-sectional view of the main part showing a state in the film pack when the remaining number of film units is one.
[Explanation of symbols]
2 Instant camera
14 Film unit
25 film packs
26 Pack room
29 Lid member
32 cases
54 Adhesive sheet
55 Press plate
59, 60 Push-up member

Claims (3)

A plurality of instant film units, an exposure opening for housing these instant film units, exposing the exposure surface of the instant film unit, and a push-up member for pushing up the instant film unit toward the exposure opening are inserted. In an instant film pack comprising a polystyrene case formed with an opening, and a light shielding member that blocks the pressing opening from within the case and shields it from light.
The light blocking member that blocks light from the inside of the case by blocking the pressing opening is formed in a flexible sheet shape having a thickness of 0.3 to 0.45 mm using a plastic having compatibility with polystyrene, and is formed on the inner surface of the case. It is formed into a plate shape having a thickness of 0.5 to 1.0 mm using a fixing sheet that is fixedly attached and a plastic that is compatible with polystyrene, and is partially fixed to the fixing sheet. And a pressing plate that uniformly transmits the pressing force of the lifting member to the instant film unit.   2. The instant film pack according to claim 1, wherein the fixing sheet is stealed to reduce its strength.   The end portion of the pressing plate is bent toward the instant film unit side, and the instant film unit in the last row and the end portion of the pressing plate are in contact with each other when not in use. Or the instant film pack of 2.

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