Patent Application
20240036441
This application is a Continuation of PCT International Application No. PCT/JP2022/015514 filed on 29 Mar. 2022, which claims priority under 35 U.S.C § 119(a) to Japanese Patent Application No. 2021-061453 filed on 31 Mar. 2021. The above application is hereby expressly incorporated by reference, in its entirety, into the present application.
The present invention relates to a printer and a digital camera including a printer.
Various mobile printers or digital cameras including a printer for recording images imaged by a digital camera or a smartphone on a recording medium such as an instant film have been on sale.
In general, a printer or a digital camera including a printer that uses an instant film as a recording medium has a configuration comprising a loading room, an exposure head, a transport roller, and a spreading roller. An instant film pack that accommodates a plurality of instant films in a case is loaded into the loading room. The exposure head exposes an image to the instant film transported from the loading room. The transport roller is positioned on a downstream side in a transport direction with respect to the exposure head, and transports the instant film in a state of pinching the instant film. The spreading roller is positioned on a downstream side in the transport direction with respect to the transport roller, and spreads a developer by crushing a developer pod of the instant film (for example, see JP2020-043548A (corresponding to US2020/0089441A1)).
There are various sizes of instant films as the recording medium, and an instant film called a wide type in which a dimension in a width direction is larger than a dimension in the transport direction is distributed. The present applicant is considering using this wide-type instant film in the above-described printer or digital camera including a printer.
However, in a case where the wide-type instant film is used, it is considered that the instant film is curved in the width direction of the instant film due to an own weight before the instant film discharged from the instant film pack reaches a transport roller pair. In a case where the instant film is transported in a curved state and the exposure is performed by the exposure head and the developer is spread by the spreading roller, for example, there is a possibility that image quality deteriorates such as a case where an image elongated by the amount of curving is exposed or spreading unevenness is caused in the developer.
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a printer and a digital camera including a printer capable of suppressing curving of an instant film due to an own weight and preventing deterioration in image quality.
In order to solve the above-mentioned problems, a printer according to an aspect of the present invention comprises a loading room, an exposure head, a transport roller, a spreading roller, and a support rib. An instant film pack is loaded into the loading room. The instant film pack comprises at least a plurality of instant films and a case which accommodates the instant films in a stacking manner and that has a feeding port for feeding the instant film formed therein. The exposure head exposes an image to the instant film transported from the loading room. The transport roller is disposed on the downstream side in a transport direction of the instant film with respect to the exposure head, and transports the instant film discharged from the instant film pack to a further downstream side in the transport direction. The spreading roller is disposed on a downstream side in the transport direction with respect to the transport roller, and spreads a developer by crushing the developer pod in a state of pinching the instant film. The support rib is provided between the loading room and the exposure head in the transport direction, and supports the instant film from a side facing the exposure head.
It is preferable that a plurality of the support ribs are provided in a width direction orthogonal to the transport direction, each of the support ribs includes a sliding surface that slides on one surface of the instant film, and the sliding surface is formed in a curved shape.
It is preferable that the support rib is disposed at a position where the support rib is spaced from an orbit of the instant film and the support rib slides in a case where the instant film is curved.
It is preferable that the support rib is formed integrally with a support member that protrudes from the exposure head toward the instant film, and the support member is fixed to the exposure head.
It is preferable that the loading room is formed in a box shape of which one surface is opened, a loading lid that covers the opened surface of the loading room is provided, and a film holding portion is provided in the loading lid, the film holding portion pressing a film press plate stored in the case, and the film holding portion includes a pressing member that touches the film cover member and a biasing member that biases the pressing member, and a plurality of the film holding portions are provided in the width direction and the transport direction in the loading lid. It is preferable that the biasing member is a spring member, and the spring member has a spring constant different for each film holding portion.
A digital camera including a printer according to an aspect of the present invention comprises the printer, and an imaging unit that includes an imaging optical system and images a subject image to output image data to the printer.
According to the present invention, it is possible to suppress the curving of the instant film due to the own weight and prevent the deterioration in the image quality.
In
The camera body 11 has a substantially square shape viewed from a front surface. The digital camera 10 including a printer uses instant films 28 (see
The imaging window 15 is disposed in a center on the front surface of the camera body 11. The imaging window 15 exposes an imaging optical system 19 (see
As shown in
The solid-state imaging element 20 comprises signal processing circuits (all not shown) such as a noise removal circuit, an auto gain controller, and an A/D conversion circuit. The noise removal circuit performs noise removal processing on the imaging signal. The auto gain controller amplifies a level of the imaging signal to an optimum value. The A/D conversion circuit converts the imaging signal into a digital signal, and outputs the digital signal to a built-in memory (not shown) from the solid-state imaging element 20. An output signal of the solid-state imaging element 20 is image data (so-called RAW data) having one color signal for each pixel.
The solid-state imaging element 20 is driven by pressing at least one of the release switch 16A or 16B, and the subject image is imaged.
A film feeding port 21 is provided on a top surface of the camera body 11. The instant film 28 on which an image has been printed is discharged from the film feeding port 21.
As shown in
As shown in
A rear display unit 17 and an operating part 18 are provided on an outer surface of the loading lid 22, that is, a rear surface of the camera body 11. The rear display unit 17 is, for example, a liquid crystal display (LCD) panel. Image data items corresponding to one frame output from the solid-state imaging element 20 are sequentially input into the rear display unit 17, and are displayed as a live preview image.
A photographer presses at least one of the release switch 16A or 16B, and thus, imaging is started. Image data items are acquired from the solid-state imaging element 20 through the imaging. An image processing unit (not shown) performs known image processing on the image data items, and then the image data items are compressed. Examples of the image processing include matrix operation, demosaicing, γ correction, luminance conversion, color difference conversion, and resizing. The image data items on which the image processing and the compression are performed are recorded in a built-in memory (not shown) such as a flash memory provided within the camera body 11.
In a case where a menu switch 18a of the operating part 18 is pressed, the image is played and displayed on the rear display unit 17 based on the image data items recorded in the built-in memory. In a case where an image desired to be printed is displayed on the rear display unit 17, the photographer presses a print switch 18b of the operating part 18, and thus, printing processing by the printer unit 13 is started.
As shown in
As shown in
As shown in
A feeding port 31c is formed on a top surface of the case member 31. The feeding port 31c is formed in a slit shape. The instant films 28 or the film cover 30 are fed one by one outwards from the instant film pack 24 by the claw member 57 inserted into the cut-off portion 31b of the case member 31 through the feeding port 31c.
A light shielding seal 31d is pasted onto the case member 31 so as to close the feeding port 31c from the outside. The light shielding seal 31d is formed as a flexible sheet. The light shielding seal 31d is pasted onto only one edge of a long side of the feeding port 31c so as not to hinder the instant film 28 or the film cover 30 when the instant film or the film cover passes through the discharge port 31c.
As shown in
The pair of unit support protrusions 32b are provided at both side edge portions of the lid 32 so as to be vertically long, and each has an arc shape of which a center portion protrudes toward the exposure aperture 31a. The unit support protrusions 32b touch both side edge portions on a rear surface of the instant film 28 positioned in a last layer, and push up the instant film 28 by each having the arc shape of which the center portion protrudes toward the exposure aperture 31a. Accordingly, a gap between the film cover 30 and the exposure aperture 31a is prevented from being formed.
The pair of caulking pins 32c are used for attaching the film press plate 27. The support piece 32d supports a center portion of the instant film 28 positioned in the last layer from behind, and prevents the instant film 28 from being curved in a direction in which the center portion is curved toward the lid 32.
The film press plate 27 includes two elastic sheets 27a and 27b made of a synthetic resin. The sheet 27a is pressed by the plurality of film holding portions 22a when the loading lid 22 is closed, and is curved so as to protrude toward the lid 32. An opening 27c and a pair of holes 27d are formed in the sheet 27a. The opening 27c is formed in a center portion of the sheet 27a so as to be vertically long, and the support piece 32d is inserted into this opening. The pair of caulking pins 32c are inserted into the pair of holes 27d, and the pair of holes are used for attaching the film press plate 27 to the lid 32.
An opening 27e and a pair of holes 27f are formed in the sheet 27b. The opening 27e is formed in a center portion of the sheet 27a, and the support piece 32d is inserted into this opening. The pair of caulking pins 32c are inserted into the pair of holes 27f. A lower end portion 27h of the sheet 27b is attached to a lower end portion 27g of the sheet 27a. Accordingly, the sheet 27b prevents the sheet 27a from being slack, and prevents light leak from the pair of openings 32a. The sheet 27b pushes up the instant film 28 in a substantially planar manner when the sheet 27a is elastically bent by the plurality of film holding portions 22a. As a result, the film cover 30 positioned in the foremost layer or the instant film 28 is pressed to the back side of the front surface of the case member 31.
L-shaped protrusions 24c are provided on both side surfaces 24a and 24b of the instant film pack 24. The protrusions 24c are protrusions provided to prevent the instant film pack 24 from being reversely loaded.
As shown in
The developer pod 36 is formed in a substantially bag shape, and contains a developer 38 therein. The developer pod 36 is pasted onto an end portion of the photosensitive sheet 34 close to the feeding port 31c, and is wrapped by an end portion of the mask sheet 33. The trap portion 37 is pasted onto an end portion of the photosensitive sheet 34 opposite to the feeding port 31c, and is similarly wrapped by the end portion of the mask sheet 33.
The photosensitive layer of the instant film 28 is irradiated with print light at the time of printing, and thus, the photosensitive layer is exposed. The developer pod 36 is torn at the time of development, and the developer 38 flows and is spread into a gap 39 between the photosensitive sheet 34 and the cover sheet 35. An image acquired through the exposure of the photosensitive layer is reversed by the diffusion reflective layer, and is transferred to the image receiving layer. By doing this, a positive image appears on a positive image observation surface 40 of the photosensitive sheet 34 exposed through the screen opening 33a.
The film cover 30 is formed as a sheet thinner than the instant film 28, and has light shielding properties and flexibility. The film cover 30 is a molded item made of a synthetic resin, and is made, for example, of polystyrene containing carbon black. That is, the film cover 30 has rigidity higher than the instant film 28. In a case where the instant film pack 24 is loaded into the film pack room 23 and is used, the film cover 30 is discharged to the film discharge port 21 by a spreading roller pair 54 (see
As shown in
In
Hereinafter, a transport direction in which the transport roller pair 53 transports the instant film 28 is a Y direction, a width direction of the instant film 28 orthogonal to the Y direction is an X direction, and a direction orthogonal to the X direction and the Y direction is a Z direction.
As shown in
L-shaped cut-off portions 23c are formed on both side surfaces 23a and 23b of the film pack room 23. The L-shaped cut-off portions 23c prevent the instant film pack 24 from being reversely loaded by being fitted with the L-shaped protrusions 24c provided on both the side surfaces 24a and 24b of the instant film pack 24.
Positioning protrusions 23d for positioning the instant film pack 24 in the X direction are provided in the film pack room 23. The positioning protrusions 23d are formed in a wedge shape in which a thickness gradually increases in the Z direction, that is, in a front-rear direction of the camera body 11.
Elastic members 23f that perform positioning in the Y direction are provided on a bottom surface 23e of the film pack room 23. The elastic member 23f is a cuboid member made of sponge or rubber. An elastic force in a case where the elastic members 23f try to return from a compressed state to an uncompressed state acts, and a top surface 24e of the instant film pack 24 is pressed against a top surface 23g of the film pack room 23. The top surface 23g of the film pack room 23 has an opening portion connected to the transport roller pair 53.
The film pack room 23 comprises a cut-off portion 23h. The claw member 57 enters the inside of the instant film pack 24 through the cut-off portion 23h, and the instant films 28 are fed one by one outwards from the instant film pack 24.
As described above, the instant film pack 24 is loaded into the film pack room 23. An image is recorded on the instant film 28 discharged from the instant film pack 24 by the printer unit 13.
As shown in
As shown in
The transport roller pair 53 includes a capstan roller 61 and a pinch roller 62. The capstan roller 61 and the pinch roller 62 are disposed at positions at which these rollers pinch a transport passage of the instant film 28 (see
The pinch roller 62 is disposed on a side of the instant film 28 facing the positive image observation surface 40. The pinch roller 62 includes a roller member 62a, a drive gear 62b, and a rotational shaft 62c. Both end portions of the roller member 62a are supported so as to freely move by the device housing 56 within a thickness range of the instant film 28, and are pressed toward the capstan roller 61 by springs 66 as press mechanisms. Thus, the pinch roller 62 is elastically supported in a direction orthogonal to the transport direction of the instant film 28.
The drive gears 61b and 62b are provided at both end portions of the rotational shafts 61c and 62c and mesh with each other. A motor is connected to one end of the rotational shaft 61c via a drive transmission gear train. Thus, in a case where the motor rotates, the capstan roller 61 and the pinch roller 62 rotate in synchronization with each other. In the instant film 28 discharged from the instant film pack 24 can be transported to a further downstream side in the transport direction, that is, toward the spreading roller pair 54 while the spike roller member 61a reliably holds both side edge portions.
The spreading roller pair 54 includes spreading rollers 63 and 64, and is disposed on a downstream side of the transport roller pair 53 in the transport direction. The spreading roller 63 is disposed on a side of the instant film 28 facing the exposure surface 28a. The spreading roller 64 is disposed on a side of the instant film 28 facing the positive image observation surface 40. Both end portions of the spreading roller 64 are supported so as to freely move within the thickness range of the instant film 28 by the device housing 56, and are pressed toward the spreading roller 63 by springs 67 (see
The discharge guide 58 is disposed on the downstream side of the spreading roller pair 54 in the transport direction. The spreading roller pair 54 transports the instant film 28 transported by the transport roller pair 53 toward the discharge guide 58 in a state of pinching the instant film over the entire width. The instant film is sandwiched by the spreading roller pair 54, and thus, the developer pod 36 of the instant film 28 is crushed. Accordingly, the developer is spread (unfolded) into the gap 39 (see
The spreading control member 55 (see
A distal end of the spreading control member 55 protrudes toward the instant film 28 from a sandwiching position at which the spreading roller pair 54 sandwiches the instant film 28 on a cross section which is orthogonal to the exposure surface 28a of the instant film 28 being transported and is in parallel with the transport direction. Accordingly, the spreading control member 55 can securely rub the positive image observation surface 40 of the instant film 28.
The transport roller pair 53 transports the instant film 28 fed from the instant film pack 24 by the claw member 57 toward the film discharge port 21. An exposure position P (see
A lens 60 constituting the exposure head 50 requires a focal length of a predetermined value or longer. For example, a SELFOCK lens (registered trademark) is used as the lens 60 (see
The controller 59 controls the exposure of the exposure head 50 based on the image data. The exposure by the exposure head 50 is performed by sequentially exposing line images on the instant film 28 while moving the instant film 28 for each line. Accordingly, an image corresponding to a single screen is exposed on the photosensitive layer of the instant film 28. The instant film 28 is subsequently transported toward the spreading roller pair 54 by the transport roller pair 53.
As shown in
As shown in
As shown in
The support ribs 51c and 51d protrude from the protrusion piece 51b toward the instant film 28 and are provided at intervals in the X direction. In the present embodiment, two support ribs 51c and 51d are provided in the X direction, but the present invention is not limited thereto, and three or more support ribs may be provided.
As shown in
Each of the support ribs 51c and 51d has a sliding surface 51h at a distal end close to the instant film 28. Although only the support rib 51c and the sliding surface 51h of the support rib 51c are shown in
The support ribs 51c and 51d are disposed at positions spaced from an orbit (position indicated by a dashed double-dotted line) of the instant film 28. The orbit of the instant film 28 as used herein refers to an orbit in a case where the instant film 28 is transported while maintaining a planar state without being curved. A position (position indicated by a solid line) through which the instant film 28 actually passes is spaced from an orbit (position indicated by a dashed double-dotted line). Thus, the support ribs 51c and 51d are disposed at positions where the support ribs slide in a case where the instant film 28 is curved.
As described above, the lens 60 constituting the exposure head 50 may require a focal length of a certain value or longer, and it is necessary to provide an interval of a dimension L from a front surface of the lens 60 to the instant film 28. The dimension L is, for example, more than or equal to 2.8 mm. Accordingly, the instant film 28 cannot be supported by the lens 60 that constitutes the exposure head 50. Therefore, the printer unit 13 comprises the support ribs 51c and 51d that support the instant film 28.
As shown in
As shown in
As shown in
The pair of pressing members 77 face each other such that positions of distal end portions 77a and rotational movement shafts 77b are opposite to each other, and are held by the holding frame 78. For example, the holding frame 78 is fixed to the loading lid 22 through screwing. The springs 79 are torsion coil springs, and are attached between the pressing members 77 and the holding frame 78. The springs 79 bias the pressing members 77 such that the distal end portions 77a move rotationally upward in the drawing. Accordingly, the distal end portions 77a press the film press plate 27.
As shown in
The springs 79 constituting the film holding portions 22a to 22d may have different spring constants for each of the film holding portions 22a to 22d. In this case, for example, the spring constants of the springs 79 constituting the film holding portions 22a and 22d are made larger than the spring constants of the springs 79 constituting the film holding portions 22b and 22b.
As described above, in the digital camera 10 including a printer, the support ribs 51c and 51d that support the instant film 28 from the side facing the exposure head 50 are provided between the film pack room 23 and the exposure head 50 in the Y direction. Thus, even though the instant film 28 is curved due to an own weight, the support ribs 51c and 51d slide with the instant film 28. Accordingly, it is possible to prevent the deterioration in the image quality by suppressing the curving of the instant film 28. Since the plurality of support ribs 51c and 51d are provided, the sliding resistance received by the instant film 28 can be reduced.
As shown in
As described above, in the digital camera 10 including a printer, the plurality of film holding portions 22a to 22d are provided in the X direction and the Y direction of the loading lid 22. Accordingly, it is possible to reduce the spring constants of the springs 79 constituting the film holding portions 22a to 22d. In a case where one film holding portion is provided in a row as in the printer of the related art, a spring member having a spring constant equal to or greater than a certain value needs to be used in order to constantly press the instant film from a state where all the instant films remain in the instant film pack to a state where the last instant film is left. Accordingly, parts of the film holding portion become large, and an increase in a size of the printer is caused.
In a case where a spring member having a large spring constant is used as in the printer of the related art, a pressing force varies greatly between a state where the number of remaining instant films is large and a state where the last instant film is left. Accordingly, the planar state of the instant film may vary depending on the remaining number, there may be an influence on the transport performance by the transport roller pair, and the image quality may deteriorate. In a case where the variation of the pressing force due to the film holding portion is large, the instant film may be caught in the discharge port.
On the other hand, in the present invention, since the plurality of film holding portions 22a and 22b or the film holding portions 22c and 22d are provided in one row, the spring constants of the springs 79 constituting the film holding portions 22a to 22d can be reduced. Accordingly, the parts of the film holding portions 22a to 22d can be set to be smaller. Further, the spring constant of the spring 79 is set to be smaller, and thus, it is possible to reduce the variation of the pressing force due to the remaining number of instant films 28. Accordingly, it is possible to prevent the deterioration in the image quality.
Since the plurality of film holding portions 22a to 22d are provided in the loading lid 22 in the X direction and the Y direction, the spring constants of the springs 79 constituting the film holding portions 22a to 22d can be different. That is, a degree of freedom of the spring constant in designing the springs 79 constituting the film holding portions 22a to 22d is increased, and the variation of the pressing force due to the remaining number of instant films 28 can be further reduced.
In the above embodiment, although the coil spring is used as the spring 79, the spring 79 is not limited thereto, and other spring members such as a leaf spring may be used. In the above embodiment, although the example in which the present invention is applied to the digital camera including a printer is used, the present invention is not limited thereto, and the present invention may be applied to a single printer.
In the above embodiment, a hardware structure of a processing unit that executes various kinds of processing such as the controller 59 includes various processors to be described below. The various processors include a central processing unit (CPU) which is a general-purpose processor that functions as various processing units by executing software (program), a graphical processing unit (GPU), a programmable logic device (PLD) such as a field programmable gate array (FPGA) which is a processor capable of changing a circuit configuration after manufacture, a dedicated electric circuit which is a processor having a circuit configuration specifically designed to execute various processing, and the like.
One processing unit may be constituted by one of these various processors, or may be constituted by a combination of two or more processors of the same type or different types (for example, a combination of a plurality of FPGAs, a combination of a CPU and an FPGA, a combination of a CPU and a GPU, or the like). The plurality of processing units may be constituted by one processor. As an example in which the plurality of processing units are constituted by one processor, firstly, one processor is constituted by a combination of one or more CPUs and software as represented by computers such as clients and servers, and this processor functions as the plurality of processing units. Secondly, a processor that realizes the functions of the entire system including the plurality of processing units via one Integrated Circuit (IC) chip is used as represented by a system on chip (SoC). As described above, the various processing units are constituted by using one or more of the various processors as the hardware structure.
Further, more specifically, an electric circuitry in which circuit elements such as semiconductor elements are combined can be used as the hardware structure of these various processors.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2021-061453 | Mar 2021 | JP | national |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/JP2022/015514 | Mar 2022 | US |
| Child | 18477698 | US |
