Mechanical pinhole camera

Abstract

The utility model relates to the technical field of pinhole cameras, in particular to a mechanical pinhole camera which comprises a shell, a bottom plate sliding groove is formed in the back face of the shell, a bottom plate is installed in the bottom plate sliding groove in a sliding mode, a film groove is formed in the front face of the bottom plate and used for containing a photosensitive film, and two connecting shafts are rotatably installed on the bottom wall of the shell. Supporting plates are fixedly installed at the top ends of the connecting shafts, supporting grooves are formed in the upper surfaces of the supporting plates, a light-transmitting frame is arranged in front of the shell, and two connecting rods are fixedly installed at the bottom end of the light-transmitting frame. According to the mechanical small-hole camera, after the device is used, the light-transmitting frame is moved to one end, close to the connecting shaft, of the supporting groove, then the supporting plate can be rotated and moved into the supporting groove, and the supporting plate is limited and fixed by rotating the limiting block to abut against the stopping block, so that the size of the device can be effectively reduced, and subsequent storage of the device is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pinhole cameras, in particular to a mechanical pinhole camera. Background Art

[0002] A mechanical pinhole camera uses the pinhole imaging principle. Its construction primarily consists of a light-tight chamber with a small hole in one side for light to pass through. Inside, a photosensitive film is placed to capture images. This principle was first applied to the "camera obscura" and is considered the ancestor of the camera. In 1839, French painter Daguerre invented the first camera based on the pinhole imaging principle. Although bulky and time-consuming at the time, these cameras marked the birth of photography. With the invention of film technology, cameras gradually became more portable and practical, and photography became widely disseminated. As a representative example of early cameras, the mechanical pinhole camera illustrates the development of photography from simple principles to modern precision instruments.

[0003] Traditional mechanical pinhole cameras have a large structure and take a long time to shoot. The size of the imaging hole is difficult to adjust, making them cumbersome to use. Their large size also makes them difficult to store, making it difficult to meet people's needs for convenient and easy-to-carry use. Utility Model Content

[0004] The purpose of the present invention is to provide a mechanical pinhole camera to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A mechanical pinhole camera includes a shell, a bottom plate slide groove is provided on the back of the shell, a bottom plate is slidably installed inside the bottom plate slide groove, a film slot is provided on the front of the bottom plate for placing photosensitive film, two connecting shafts are rotatably installed on the bottom wall of the shell, the top ends of the connecting shafts are fixedly installed with support plates, the upper surfaces of the support plates are provided with support grooves, a light-transmitting frame is provided in the front of the shell, two connecting rods are fixedly installed on the bottom end of the light-transmitting frame, the bottom ends of the connecting rods pass through the support grooves and are fixedly installed with anti-slip plates, an installation groove is provided on the front of the light-transmitting frame, a pinhole plate is installed inside the installation groove, and an upper limit plate and a lower limit plate are also installed on the front of the light-transmitting frame by fixing bolts for fixing the pinhole plate.

[0007] Preferably, a light-shielding groove is provided on the side surface of the bottom plate, and a light-shielding plate is slidably provided inside the light-shielding groove to close the film slot.

[0008] Preferably, the bottom ends of the connecting shafts extend to the bottom of the shell, a limit block is rotatably mounted on the bottom ends of the connecting shafts, and a blocking block is fixedly mounted on the bottom surface of the shell, and the blocking block matches the limit block.

[0009] Preferably, a limiting plate is fixedly installed on the outer surface of the connecting rod, a pressure plate is slidably connected to the outer surface of the connecting rod, a spring is sleeved on the outer surface of the connecting rod, the top end of the spring is connected to the limiting plate, the bottom end of the spring is connected to the pressure plate, and the pressure plate abuts against the upper surface of the support plate to fix the position of the light-transmitting frame.

[0010] Preferably, an arc-shaped groove is formed at one end of the supporting groove close to the connecting shaft, and an accommodating groove is formed between the connecting shaft and the bottom wall of the shell, and the accommodating groove matches the anti-slip plate.

[0011] Preferably, a plurality of bolts are installed on the front side of the housing.

[0012] Compared with the prior art, the present invention provides a mechanical pinhole camera with the following advantages:

[0013] 1. This mechanical pinhole camera is separated from the support plate by pressing the pressure plate upwards and compressing the spring. The light-transmitting frame can slide on the support slot through the connecting rod, making it easy to adjust the distance between the pinhole plate on the light-transmitting frame and the bottom plate for easy focusing. By turning the fixing bolts, the upper and lower limit plates can be removed, making it easy to remove and replace the pinhole plate. Pinhole plates with different apertures can be installed to meet the exposure requirements of different photos.

[0014] 2. When the mechanical pinhole camera is finished using the device, the light-transmitting frame is moved to the end of the support groove close to the connecting shaft, and then the support plate can be rotated to move it to the inside, and then the limit block is rotated to abut against the blocking block to limit and fix the support plate, which can effectively reduce the volume of the device and facilitate the subsequent storage of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the folded structure of the utility model;

[0017] Figure 3 This is a schematic structural diagram of the light intake assembly of the present utility model;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure of the bottom plate of the present invention.

[0019] In the figure: 1. Shell; 2. Bottom plate slide; 3. Bottom plate; 4. Film slot; 5. Shading slot; 6. Shading plate; 7. Connecting shaft; 8. Support plate; 9. Support slot; 10. Limit block; 11. Transparent frame; 12. Connecting rod; 13. Spring; 14. Pressure plate; 15. Limit plate; 16. Pinhole plate; 17. Upper limit plate; 18. Lower limit plate; 19. Anti-slip plate; 20. Bolt. DETAILED DESCRIPTION

[0020] See also Figure 1-4 A mechanical pinhole camera includes a housing 1, a bottom plate slot 2 is provided on the back of the housing 1, a bottom plate 3 is slidably installed inside the bottom plate slot 2, a film slot 4 is provided on the front of the bottom plate 3 for placing photosensitive film, two connecting shafts 7 are rotatably installed on the bottom wall of the housing 1, and a support plate 8 is fixedly installed on the top of the connecting shaft 7. The upper surface of the support plate 8 is provided with a support groove 9, and a light-transmitting frame 11 is provided in front of the housing 1. Two connecting rods 12 are fixedly installed at the bottom end of the light-transmitting frame 11. The bottom end of the rod 12 passes through the supporting slot 9 and is fixedly installed with an anti-slip plate 19. The front of the light-transmitting frame 11 is provided with a mounting slot, and a small hole plate 16 is installed inside the mounting slot. The front of the light-transmitting frame 11 is also equipped with an upper limit plate 17 and a lower limit plate 18 by fixing bolts, which are used to fix the small hole plate 16. By rotating the fixing bolts, the upper limit plate 17 and the lower limit plate 18 can be removed, which facilitates the removal and replacement of the small hole plate 16 and the installation of small hole plates 16 with different apertures to meet the exposure requirements of different photos.

[0021] Among them, a light-shielding groove 5 is opened on the side of the bottom plate 3, and a light-shielding plate 6 is slidingly set inside the light-shielding groove 5 to close the film slot 4. The bottom plate 3 is pulled out, and the photosensitive film is installed in the film slot 4. Then the light-shielding plate 6 is inserted into the inside of the light-shielding groove 5 to close the film slot 4, which is convenient for protecting the photosensitive film and preventing it from being exposed to light. Then the bottom plate 3 is inserted back into the inside of the bottom plate slide groove 2 to complete the preparation work. After the small hole of the device is aligned with the object to be photographed, the light-shielding plate 6 is pulled out, and after the photosensitive film is exposed and photographed, the light-shielding plate 6 is inserted back to prevent the photosensitive film from being overexposed.

[0022] Among them, the bottom end of the connecting shaft 7 extends to the bottom of the shell 1, and the limit block 10 is rotatably installed on the bottom end of the connecting shaft 7. The bottom surface of the shell 1 is fixedly installed with a blocking block, which matches the limit block 10. The outer surface of the connecting rod 12 is fixedly installed with a limiting plate 15, and the outer surface of the connecting rod 12 is slidably connected with a pressure plate 14. The outer surface of the connecting rod 12 is sleeved with a spring 13, the top end of the spring 13 is connected to the limit plate 15, and the bottom end of the spring 13 is connected to the pressure plate 14. The pressure plate 14 abuts against the upper surface of the support plate 8 for fixing the position of the light-transmitting frame 11.

[0023] By pressing the pressure plate 14 upward to separate it from the support plate 8 and compressing the spring 13, the light-transmitting frame 11 can slide on the support groove 9 through the connecting rod 12, which makes it easy to adjust the distance between the pinhole plate 16 on the light-transmitting frame 11 and the bottom plate 3, and facilitates focusing. When the device is finished using, the light-transmitting frame 11 is moved to the end of the support groove 9 close to the connecting shaft 7 through the connecting rod 12, and then the support plate 8 can be rotated to move it to the inside of 1, and then the limit block 10 is rotated to abut against the blocking block to limit and fix the support plate 8, which can effectively reduce the volume of the device and facilitate the subsequent storage of the device.

[0024] Furthermore, an arc-shaped groove is opened at one end of the support groove 9 near the connecting shaft 7, and a receiving groove is formed between the connecting shaft 7 and the bottom wall of the shell 1. The receiving groove matches the anti-slip plate 19 to prevent the anti-slip plate 19 from colliding with the shell 1 when the connecting rod 12 is moved. The arc-shaped groove is used to prevent the connecting rod from getting stuck when the support plate 8 is rotated, affecting the folding work of the device.

[0025] Among them, a plurality of bolts 20 are installed on the front of the shell 1. When in use, first cover the outer surface of the shell 1 and the light-transmitting frame 11 with black cloth to form a black box, and then fix the black cloth on the shell 1 with the bolts 20.

[0026] Working Principle: When using this mechanical pinhole camera, first cover the outer surface of the housing 1 and the light-transmitting frame 11 with a black cloth to form a black box. Fix the black cloth to the housing 1 with bolts 20, lift the front end of the black cloth slightly to expose the small hole on the pinhole plate 16, then pull out the bottom plate 3, install the photosensitive film in the film slot 4, and then insert the light-shielding sheet 6 into the light-shielding slot 5 to close the film slot 4 to protect the photosensitive film and prevent it from being exposed to light. Then, insert the bottom plate 3 back into the bottom plate slide 2 to complete the preparation work.

[0027] After aligning the small hole of the device with the object to be photographed, the light shielding sheet 6 is pulled out to allow the photosensitive film to be exposed and photographed, and then the light shielding sheet 6 is inserted back to prevent the photosensitive film from being overexposed. After the photographing is completed, the photosensitive film can be taken out and processed to obtain a photo;

[0028] By pressing the pressure plate 14 upward to separate it from the support plate 8 and compressing the spring 13, the light-transmitting frame 11 can slide on the support groove 9 through the connecting rod 12, making it easy to adjust the distance between the pinhole plate 16 on the light-transmitting frame 11 and the bottom plate 3, which is convenient for focusing. By turning the fixing bolts, the upper limit plate 17 and the lower limit plate 18 are removed, making it easy to remove and replace the pinhole plate 16. Pinhole plates 16 with different apertures can be installed to meet the exposure requirements of different photos;

[0029] When the device is finished using, the light-transmitting frame 11 is moved to the end of the support groove 9 close to the connecting shaft 7, and then the support plate 8 can be rotated to move it to the inside of 1, and then the limit block 10 is rotated to abut against the blocking block to limit and fix the support plate 8, which can effectively reduce the volume of the device and facilitate the subsequent storage of the device.

Claims

1. A mechanical pinhole camera, comprising a housing (1), characterized in that: The back of the shell (1) is provided with a bottom plate slot (2), the interior of the bottom plate slot (2) is slidably mounted with a bottom plate (3), the front of the bottom plate (3) is provided with a film slot (4) for placing photosensitive film, the bottom wall of the shell (1) is rotatably mounted with two connecting shafts (7), the top ends of the connecting shafts (7) are fixedly mounted with support plates (8), the upper surfaces of the support plates (8) are provided with support slots (9), and the front of the shell (1) is provided with a light-transmitting frame. (11), two connecting rods (12) are fixedly installed at the bottom end of the light-transmitting frame (11), the bottom ends of the connecting rods (12) pass through the supporting grooves (9), and are fixedly installed with anti-slip plates (19), the front of the light-transmitting frame (11) is provided with a mounting groove, the interior of the mounting groove is provided with a small hole plate (16), and the front of the light-transmitting frame (11) is also provided with an upper limit plate (17) and a lower limit plate (18) by fixing bolts for fixing the small hole plate (16).

2. The mechanical pinhole camera according to claim 1, wherein: A light shielding groove (5) is provided on the side of the bottom plate (3), and a light shielding plate (6) is slidably provided inside the light shielding groove (5) for closing the film slot (4).

3. The mechanical pinhole camera according to claim 1, wherein: The bottom ends of the connecting shafts (7) extend to the bottom of the housing (1), and a limit block (10) is rotatably mounted on the bottom ends of the connecting shafts (7). A blocking block is fixedly mounted on the bottom surface of the housing (1), and the blocking block matches the limit block (10).

4. The mechanical pinhole camera according to claim 1, wherein: A limiting plate (15) is fixedly mounted on the outer surface of the connecting rod (12), and a pressure plate (14) is slidably connected to the outer surface of the connecting rod (12). A spring (13) is sleeved on the outer surface of the connecting rod (12), and the top end of the spring (13) is connected to the limiting plate (15), and the bottom end of the spring (13) is connected to the pressure plate (14). The pressure plate (14) abuts against the upper surface of the support plate (8) to fix the position of the light-transmitting frame (11).

5. The mechanical pinhole camera according to claim 1, wherein: An arc-shaped groove is formed at one end of the support groove (9) close to the connecting shaft (7), and an accommodating groove is formed between the connecting shaft (7) and the bottom wall of the housing (1), and the accommodating groove matches the anti-slip plate (19).

6. The mechanical pinhole camera according to claim 1, wherein: A plurality of bolts (20) are installed on the front side of the housing (1).

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