Film developing box

Abstract

This invention provides a film developing box, including a box body and a cover. The box body is hollow to form a cavity, and the top of the box body has an opening communicating with the cavity. The cavity is used to hold the film to be developed. At least a portion of the top face of the box body forms a guide surface, and a first guide groove is provided on the guide surface. The bottom wall of the first guide groove is connected to the inner wall of the cavity, and the bottom wall of the first guide groove is inclined towards the bottom of the box body. The cover is detachably fitted onto the top of the cavity, and there is a gap between the cover and the guide surface to form a channel communicating with the first guide groove and the external environment. In this application, by forming a first guide groove on the guide surface, the liquid medicine on the guide surface can be continuously introduced into the first guide groove by utilizing the height difference, thereby overcoming the surface tension of the guide surface and allowing the liquid medicine to continuously flow into the cavity through the first guide groove, avoiding the accumulation of liquid medicine on the guide surface and reducing product safety hazards.

Description

Technical Field

[0001] This invention relates to the field of photography and videography, and in particular to a film developing box. Background Technology

[0002] Some cameras require film developing after taking photos in order to develop the image. Traditional film developing requires a special darkroom, which is very inconvenient.

[0003] With technological advancements, small, manual film developing cassettes for home use have emerged. By placing the film core assembly and adding chemicals, such as developer or fixer, inside an opaque cassette, the film wound around the film core assembly can fully contact and react with the chemicals to complete the developing or fixing process, greatly improving the convenience of film developing.

[0004] The film developing cassette includes a cassette body and a lid. The cassette body has an open cavity at one end, and the lid covers this open end, preventing light from entering. The lid connects to a platform extending from the inner wall of the cassette body. When adding developing solutions, the film is first placed in the cavity, and after the lid is closed, the developing solutions are added to the platform surface, allowing them to flow into the cavity. However, due to surface tension, some developing solutions accumulate on the platform surface. Since the developing solutions are corrosive and toxic, the exposed developing solutions pose a safety hazard to users and reduce product reliability. Summary of the Invention

[0005] The purpose of this invention is to solve the problem that when adding medicine, the medicine will accumulate on the platform surface instead of flowing into the cavity, causing the medicine to be exposed on the platform surface and posing a safety hazard to the user.

[0006] To solve the above-mentioned technical problems, the present invention provides a film developing box, comprising:

[0007] The box body is hollow inside to form a cavity. The top of the box body has an opening that communicates with the cavity. The cavity is used to hold the film to be washed. At least a portion of the top end face of the box body forms a guide surface. The guide surface has a first guide groove. The bottom wall of the first guide groove is connected to the inner side wall of the cavity. The bottom wall of the first guide groove is inclined towards the bottom of the box body.

[0008] A cover body, removably fitted to the top of the cavity, the cover body covering part of the guide surface, and a gap between the cover body and the guide surface to form a channel connecting the first guide groove and the outside, the channel allowing the medicine to enter the cavity to rinse the film.

[0009] In one exemplary embodiment of this application, the inner sidewall portion of the cavity connected to the guide surface is recessed to form a second guide groove. The recess depth of the second guide groove gradually decreases in the direction from the top end to the bottom end of the box body. The top end of the second guide groove is connected to the first guide groove, and the liquid medicine flows into the cavity sequentially through the first guide groove and the second guide groove.

[0010] In one exemplary embodiment of this application, the width of the second guide groove gradually decreases in the direction from the top to the bottom of the box.

[0011] In one exemplary embodiment of this application, the outer edge of the top of the box body is provided with a side panel, the side panel protrudes from the top of the box body, the cavity is located inside the side panel, and the cover is detachably disposed inside the side panel.

[0012] In one exemplary embodiment of this application, the cover abuts against the top end face of the box body, and there is a gap between the part of the side wall connected to the guide surface and the cover body. The gap is connected to the external environment and the channel, and the liquid medicine flows into the channel through the gap and the guide surface.

[0013] In one exemplary embodiment of this application, the film developing box further includes a connecting portion, which is connected to one end of the guide surface near the cavity and is disposed opposite to the portion of the side enclosure connected to the guide surface. A notch is provided on the connecting portion, and the first guide groove extends into the notch.

[0014] In one exemplary embodiment of this application, the film developing box further includes a light-blocking portion disposed on the portion of the guide surface covered by the cover, the light-blocking portion being arranged at an interval relative to the notch, and the area between the light-blocking portion and the connecting portion forming the channel.

[0015] In one exemplary embodiment of this application, the light-blocking portion extends beyond the opposite ends of the notch at both ends in its length direction, and the top end of the light-blocking portion is not lower than the top end of the connecting portion.

[0016] In one exemplary embodiment of this application, the bottom of the cover is provided with a protrusion, which abuts against the inner wall of the cavity connected to the flow guide surface. The protrusion is directly opposite the notch, and the side of the protrusion facing the notch is provided with a groove. The groove extends along the direction from the top end to the bottom end of the box, and the groove connects the notch and the interior of the cavity.

[0017] In one exemplary embodiment of this application, the top end face of the box body is recessed towards the bottom end of the box body from the end opposite to the cavity, so as to form a groove with the side enclosure, and the bottom edge of the cover body is engaged in the groove.

[0018] As can be seen from the above technical solution, the beneficial effects of the present invention are as follows:

[0019] In this application, by setting a guide surface, the liquid medicine added to the guide surface can flow into the cavity along the guide surface. Furthermore, by forming a first guide groove on the guide surface, the liquid medicine on the guide surface can be continuously introduced into the first guide groove by utilizing the height difference. This allows the liquid medicine to overcome the surface tension on the guide surface and continuously flow into the cavity through the first guide groove, preventing the liquid medicine from accumulating on the guide surface and reducing the safety hazards of the product. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the film developing box in an embodiment of this application. Figure 1 .

[0021] Figure 2 This is a schematic diagram of the film developing box in an embodiment of this application. Figure 2 .

[0022] Figure 3 This is a schematic diagram of the structure of the film developing box after the cover is hidden, as shown in the embodiment of this application. Figure 1 .

[0023] Figure 4 This is a schematic diagram of the structure of the film developing box after the cover is hidden, as shown in the embodiment of this application. Figure 2 .

[0024] Figure 5 This is a schematic diagram of the structure of the film developing box after the cover is hidden, as shown in the embodiment of this application. Figure 3 .

[0025] Figure 6 This is an exploded view of the cover and the box body in the film developing box of this application embodiment.

[0026] Figure 7 This is a cross-sectional view of the film developing box in an embodiment of this application. Figure 1 .

[0027] Figure 8 This is a cross-sectional view of the film developing box in an embodiment of this application. Figure 2 .

[0028] The annotations in the attached figures are explained as follows:

[0029] Box body 1, cavity 10, flow guide surface 11, channel 12, side wall 13, slot 14, first guide groove 15, second guide groove 16, pouring port 17, cover 2, filling port 20, cover body 21, snap-fit ​​part 22, protrusion 23, groove 24, connecting part 3, notch 30, light blocking part 4, film roll cutting module 5, rotating handle 6. Detailed Implementation

[0030] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0031] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back) are merely for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] See Figures 1 to 3 This embodiment provides a film developing box, which includes a box body 1 and a cover 2. The box body 1 is the main structure of the film developing box, and the interior of the box body 1 is hollow to form a cavity 10, which is used to accommodate the film to be developed and related functional components.

[0034] In some embodiments, the top of the box body 1 has an opening communicating with the cavity 10. When placing the film, the film can be placed into the cavity 10 through the opening at the top of the box body 1. The box body 1 can be a rectangular prism or a cylinder, etc., and the cross-section of the cavity 10 can be rectangular or circular, etc.

[0035] Understandably, due to the formation of the cavity 10, the box body 1 has a certain thickness, and the top end face of the box body 1 also has a certain area. At least a portion of the top end face of the box body 1 forms a guide surface 11. This can be either one side of the top end face of the box body 1 having a guide surface 11, or all end faces of the top end face of the box body 1 having a guide surface 11. When adding liquid medicine, the liquid medicine can be added onto the guide surface 11, and the liquid medicine flows into the cavity 10 along the guide surface 11.

[0036] In some embodiments, the cover 2 is removably fitted onto the top of the cavity 10, thereby opening or closing the top opening of the box 1 to make the cavity 10 open or closed.

[0037] In some embodiments, the cover 2 may be flat to cover the opening at the top of the box 1. When the cover 2 is connected to the box 1, there is a gap between the cover 2 and the guide surface 11 to form a channel 12 connecting the cavity 10 and the external environment. The channel 12 allows the medicine to enter the cavity 10 to rinse the film. To maintain a dark environment inside the cavity 10 when the cover 2 is on, both the box 1 and the cover 2 are made of opaque material.

[0038] It should be noted that the solution can be either a developer or a fixer. By pouring the solution into the cavity 10, it can come into contact with the film placed in the cavity 10 and react to complete the development or fixing operations. Compared with the traditional method of performing these operations in a special darkroom, this greatly improves the convenience of developing film.

[0039] In some embodiments, the film developing cassette further includes a film cutting module 5. A mounting base is provided on one side of the cassette body 1, and the film cutting module 5 is mounted on the mounting base. The film is wound in a roll onto the film cutting module 5, and one end of the film is connected to a core assembly disposed within a cavity 10. The core assembly can rotate within the cavity 10 via a rotating shaft. During developing, the core assembly rotates under the drive of the rotating shaft, thereby gradually winding the film onto the core assembly. With continuous rotation, the film fully contacts and reacts with the chemical solution within the cavity 10. A rotating handle 6 can also be provided on the outer wall of the cassette body 1. The rotating handle 6 extends into the cassette body 1 and is connected to the rotating shaft, allowing manual developing of the film by controlling the rotation of the handle 6. A cover 2 can cover the film cutting module 5 for protection.

[0040] In some embodiments, a side panel 13 is provided at the outer edge of the top of the box body 1. The side panel 13 is provided along the outer edge contour of the box body 1 and protrudes from the top of the box body 1, so that the top end face of the box body 1 is surrounded within the side panel 13, and the cavity 10 is located within the side panel 13. In this way, when adding liquid medicine, there is no need to worry about the liquid medicine flowing from the guide surface 11 to the outside of the box body 1, making the addition of liquid medicine more convenient. The side panel 13 can be integrally formed with the top of the box body 1, which can simplify the manufacturing process, improve the airtightness, and prevent the liquid medicine from leaking from the gap between the side panel 13 and the outer edge of the top of the box body 1.

[0041] In some embodiments, by providing a side panel 13, the cover 2 can be detachably disposed within the side panel 13, thereby providing a certain degree of protection for the cover 2. The dimensional relationship between the cover 2 and the side panel 13 can also be reasonably set, allowing the cover 2 to snap into the side panel 13 for easy installation and removal. Simultaneously, because the cover 2 is located within the side panel 13, the area between the cover 2 and the top of the housing 1 is blocked by the side panel 13, preventing external light from directly entering between the cover 2 and the top of the housing 1. This minimizes the amount of light entering the cavity 10, keeping the cavity 10 dark and improving the film processing effect.

[0042] In some embodiments, the cover 2 abuts against the top end face of the box body 1, and the top end of the box body 1 provides support for the cover 2. The end of the top end face of the box body 1 facing away from the cavity 10 is recessed towards the bottom end of the box body 1 to form a groove 14 with the side wall 13. The inner side wall of the side wall 13 forms the groove side wall of the groove 14. The bottom edge of the cover 2 engages in the groove 14, thereby engaging the cover 2 and the box body 1 to facilitate the installation and removal of the cover 2.

[0043] See Figure 6 In some embodiments, the cover 2 may include a cover body 21 and a snap-fit ​​portion 22 disposed on the edge of the cover body 21. The cover body 21 is flat, and the snap-fit ​​portion 22 protrudes from the bottom edge of the cover body 21, so that when the cover 2 and the box 1 are snapped together, the snap-fit ​​portion 22 fits into the snap-fit ​​groove 14. The top of the cover body 21 may also be provided with a handle groove to facilitate lifting the cover 2 and removing it from the box 1.

[0044] In some embodiments, the slot 14 may also be provided on the bottom edge of the cover 2, and the top end face of the box 1 is provided with a protruding snap-fit ​​part 22, which snaps into the slot 14 provided on the bottom edge of the cover 2 to realize the snap-fit ​​connection between the cover 2 and the box 1.

[0045] In some other embodiments, the top end faces of the cover 2 and the box 1 can be detachably connected by adhesive or screwing.

[0046] See also Figures 4 to 5 In some embodiments, the cover 2 partially covers the guide surface 11, creating a gap between the portion of the side panel 13 connected to the guide surface 11 and the cover 2. This gap connects the cover 2 to the external environment and the channel 12. The liquid medicine flows through the gap, through the guide surface 11, into the channel 12, and finally into the cavity 10. By appropriately setting the width of the gap, a larger inlet 20 can be formed in the gap area, allowing for a larger area to receive the liquid medicine during addition, making the process easier. Simultaneously, because the cover 2 covers the guide surface 11, external light cannot directly enter the cavity 10 from above the cover 2.

[0047] In some embodiments, a drain outlet 17 may be provided at the corner of the side enclosure 13. This allows the film developing cassette to be tilted to allow the solution to flow out along the drain outlet 17 when the film developing is complete and the solution needs to be poured out of the cavity 10. The drain outlet 17 may be formed by two side walls of the side enclosure 13, which are respectively connected to the two sides of the guide surface 11. The outwardly inclined portion of the two side walls forms the outwardly expanding drain outlet 17 at the junction of the two side walls.

[0048] In some embodiments, the film developing box further includes a connecting portion 3. The connecting portion 3 is connected to the end of the guide surface 11 near the cavity 10. The connecting portion 3 and the portion of the side wall 13 connected to the guide surface 11 are arranged opposite to each other, so that the connecting portion 3, the side wall 13 and the guide surface 11 can be enclosed to form a groove structure with the groove opening upward. At the same time, the connecting portion 3 is provided with a notch 30, and the channel 12 communicates with the cavity 10 through the notch 30. The medicine can flow into the cavity 10 through the notch 30. The notch 30 forms the outlet of the groove structure, which can concentrate the medicine flowing into the cavity 10 from the notch 30. With the help of the connecting portion 3, the flow of the medicine on the guide surface 11 can be more controllable. The notch 30 can be set at any position of the connecting portion 3. In this embodiment, the notch 30 is set at the center of the connecting portion 3, and the medicine can be collected from both sides to the notch 30.

[0049] It should be noted that the notch 30 extends to connect with the guide surface 11, so that the connecting part 3 will not obstruct the flow of the liquid medicine at the notch 30, and the liquid medicine can flow more smoothly from the notch 30 to the cavity 10.

[0050] In some embodiments, the connecting portion 3 may be plate-shaped and integrally formed with the inner wall of the cavity 10, extending from the inner wall of the cavity 10 toward the direction protruding from the guide surface 11. The connecting portion 3 may also be a separate component that is sealed to one end of the guide surface 11.

[0051] In some embodiments, the film developing box further includes a light-blocking part 4. The light-blocking part 4 is disposed on the portion of the guide surface 11 covered by the cover 2, and the light-blocking plate is disposed at a distance from the notch 30. By providing the light-blocking part 4, light entering from the front of the notch 30 is blocked, so as to avoid light entering the cavity 10 as much as possible, and keep the cavity 10 in an absolutely dark state.

[0052] It is understood that by spacing the light-blocking part 4 from the notch 30, a gap is created between the light-blocking part 4 and the connecting part 3, and the area between the light-blocking part 4 and the connecting part 3 forms the aforementioned channel 12. When adding the medicine, the medicine is first added to the inlet 20. Due to the obstruction of the light-blocking part 4, the medicine flows from both sides of the light-blocking plate into the channel 12, and finally flows into the cavity 10 from the notch 30.

[0053] Meanwhile, to prevent the liquid from accumulating on the side of the light-blocking part 4 away from the connecting part 3, the length of the light-blocking part 4 can be reasonably set to avoid it being too long. In this embodiment, the two ends of the light-blocking part 4 extend beyond the opposite ends of the notch 30 in the length direction, and the top of the light-blocking part 4 is not lower than the top of the connecting part 3, so as to ensure that no light can enter from the front of the notch 30.

[0054] In some embodiments, the light-blocking part 4 may be flat, made of an opaque material, and sealed to the guide surface 11.

[0055] In some embodiments, the bottom of the cover 2 is provided with a protrusion 23. The protrusion 23 abuts against the inner wall of the cavity 10 connected to the guide surface 11, so that the cover 2 can be engaged in the cavity 10 by the protrusion 23 when it is installed. Furthermore, the protrusion 23 and the notch 30 are arranged opposite each other. The side of the protrusion 23 facing the notch 30 is provided with a groove 24. The groove 24 extends from the top end to the bottom end of the box 1. The groove 24 connects the notch 30 and the inside of the cavity 10. In this way, after the medicine flows out of the notch 30, it flows directly to the groove wall of the groove 24 and then flows into the cavity 10 along the groove wall of the groove 24, which can prevent the medicine from directly impacting the film set in the cavity 10.

[0056] In some embodiments, the two sides of the protrusion 23 should extend beyond the two sides of the notch 30 so that the notch 30 is completely blocked by the protrusion 23, and the liquid medicine can only flow into the cavity 10 along the groove wall of the groove 24.

[0057] See Figure 7In some embodiments, to prevent the liquid medicine from accumulating on the guide surface, a first guide groove 15 may be provided on the guide surface 11. The first guide groove 15 may be formed by a recess in the portion of the guide surface 11 near the notch 30. The bottom wall of the first guide groove 15 is connected to the inner sidewall of the cavity 10, and the first guide groove 15 extends into the notch 30. The sidewall of the first guide groove 15 is connected to the body of the guide surface 11. The bottom wall of the first guide groove 15 is inclined towards the bottom end of the box 1, and the liquid medicine flows into the notch 30 through the first guide groove 15 and finally into the cavity 10.

[0058] In some embodiments, by providing a first guide groove 15, the liquid medicine on the guide surface 11 can be continuously introduced into the first guide groove 15 by utilizing the height difference, thereby further enabling the liquid medicine to overcome the surface tension of the guide surface 11, so that the liquid medicine can continuously flow into the cavity 10 through the first guide groove 15.

[0059] In some embodiments, the first guide groove 15 is formed by two side walls and a bottom wall connected thereto. One end of each side wall of the first guide groove 15 can be connected to both ends of the notch 30, and the other end of each side wall is connected to the light-blocking part 4. Furthermore, the two side walls are connected together at the light-blocking part 4, so that the two side walls are inclined relative to the light-blocking part 4 and the connecting part 3, which improves the effect of the liquid overcoming the surface tension of the guide surface 11.

[0060] In some embodiments, the inner sidewall of the cavity 10 connected to the guide surface 11 is recessed to form a second guide groove 16. The top end of the second guide groove 16 is connected to the first guide groove 15. The second guide groove 16 extends along the direction from the top end to the bottom end of the box body 1, so that the liquid medicine can flow continuously from the guide surface 11 to the first guide groove 15 and the second guide groove 16. The first guide groove 15 and the second guide groove 16 form a leakage guiding structure to guide the liquid medicine to flow into the cavity 10.

[0061] In some embodiments, the depth of the second guide groove 16 gradually decreases in the direction from the top to the bottom of the box body 1, and the bottom wall of the second guide groove 16 can play a guiding role, so that the medicine flows along the bottom wall of the second guide groove 16 into the cavity 10.

[0062] In some embodiments, the width of the second guide groove 16 gradually decreases in the direction from the top to the bottom of the box body 1, thereby enabling the second guide groove 16 to form a sharp structure, further breaking the surface tension of the guide surface 11 and preventing the liquid medicine from accumulating on the guide surface 11.

[0063] See Figure 8In some embodiments, the guide surface 11 is inclined toward the bottom of the box body 1. By inclining the guide surface 11 toward the bottom of the box body 1, the liquid medicine on it can overcome the surface tension of the guide surface 11 under its own gravity and continuously move toward the cavity 10, eventually converging at the first guide groove and flowing into the cavity 10, thus preventing the accumulation of liquid medicine. Even if a small amount of liquid medicine remains, it will remain near the connecting part 3 under its own gravity. Since this position is covered by the cover 2, the liquid medicine is prevented from being exposed, thereby completely eliminating the safety hazard to the user.

[0064] In some embodiments, the angle at which the guide surface 11 is inclined toward the bottom of the housing 1 should be moderate, and the inclination angle can be between 1° and 30°, so as to avoid the cavity 10 being limited in height and affecting the volume of the cavity 10 due to an excessive inclination angle. The inclination angle can be 1°, 15° or 30°, etc.

[0065] In summary, in this embodiment, by tilting the guide surface 11 toward the bottom of the box 1, its own gravity can be used to accelerate the flow of the liquid medicine along the guide surface 11 toward the cavity 10. In conjunction with the first guide groove 15 and the second guide groove 16, the surface tension of the guide surface 11 is overcome, so that after the liquid medicine is added to the guide surface 11, it can flow continuously into the cavity 10, avoiding its accumulation on the guide surface 11.

[0066] In this application, unless otherwise expressly specified and limited, the terms "assembly," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] In the description of this specification, references to terms such as "some embodiments," "exemplarily," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application. Therefore, any changes or modifications made in accordance with the claims and description of this application should fall within the scope of this patent application.

Claims

1. A film developing box, characterized in that, include: The box body is hollow inside to form a cavity. The top of the box body has an opening that communicates with the cavity. The cavity is used to hold the film to be washed. At least a portion of the top end face of the box body forms a guide surface. The guide surface has a first guide groove. The bottom wall of the first guide groove is connected to the inner side wall of the cavity. The bottom wall of the first guide groove is inclined towards the bottom of the box body. A cover body, removably fitted to the top of the cavity, the cover body partially covering the guide surface, and a gap between the cover body and the guide surface to form a channel connecting the first guide groove and the external environment, the channel allowing the medicine to enter the cavity to rinse the film.

2. The film developing box according to claim 1, characterized in that, The inner wall portion of the cavity connected to the guide surface is recessed to form a second guide groove. The recess depth of the second guide groove gradually decreases from the top to the bottom of the box. The top of the second guide groove is connected to the first guide groove. The medicine flows into the cavity sequentially through the first guide groove and the second guide groove.

3. The film developing box according to claim 2, characterized in that, The width of the second guide groove gradually decreases from the top to the bottom of the box.

4. The film developing box according to claim 1, characterized in that, The top outer edge of the box body is provided with a side panel, which protrudes from the top of the box body. The cavity is located inside the side panel, and the cover is detachably disposed inside the side panel.

5. The film developing box according to claim 4, characterized in that, The cover abuts against the top end face of the box body. The part of the side panel connected to the flow guide surface has a gap with the cover. The gap is connected to the external environment and the channel. The medicine flows into the channel through the gap and the flow guide surface.

6. The film developing box according to claim 5, characterized in that, The film developing box also includes a connecting part, which is connected to one end of the guide surface near the cavity and is disposed opposite to the part of the side enclosure that is connected to the guide surface. A notch is provided on the connecting part, and the first guide groove extends into the notch.

7. The film developing box according to claim 6, characterized in that, The film developing box also includes a light-blocking part, which is disposed on the portion of the guide surface covered by the cover. The light-blocking part is arranged at an interval relative to the notch, and the area between the light-blocking part and the connecting part forms the channel.

8. The film developing box according to claim 7, characterized in that, The light-blocking portion extends beyond the opposite ends of the notch at both ends along its length, and the top end of the light-blocking portion is not lower than the top end of the connecting portion.

9. The film developing box according to claim 6, characterized in that, The bottom of the cover is provided with a protrusion, which abuts against the inner wall of the cavity connected to the flow guide surface. The protrusion is directly opposite the notch, and the side of the protrusion facing the notch is provided with a groove. The groove extends from the top end to the bottom end of the box and connects the notch and the interior of the cavity.

10. The film developing box according to claim 5, characterized in that, The top end of the box body is recessed towards the bottom end of the box body from the cavity, so as to form a groove with the side enclosure, and the bottom edge of the cover body is engaged in the groove.

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