Digital film transmission device

Abstract

The utility model belongs to the technical field of film exposure, and discloses a digital film transmission device, which comprises a transmission mechanism and a driving mechanism, a film window is arranged on a fixed seat, a driving gear and a driven gear are rotatably arranged on the fixed seat, and digital films are respectively wound on the driving gear and the driven gear. The driving plate is arranged at the output end of the driving motor, the ratchet wheel is connected to the driving gear and is in meshed connection with the driving plate, the driving motor drives the driving plate to rotate at a constant speed, the driving plate rotates by one circle and the ratchet wheel is shifted by one tooth number, and the driving gear and the ratchet wheel synchronously rotate at the same speed; the digital film is driven to move and temporarily stay at the film window, the optical machine exposes the digital film through the film window, writing of one frame of image data is completed, an intermittent start-stop transmission and frame writing mode of the digital film is achieved, stable exposure writing of an image is guaranteed, and the writing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of film exposure, in particular to a digital film transmission device. Background Art

[0002] The core optical machine of digital film writing equipment has two writing modes, frame writing mode and line scanning writing mode. The frame writing mode has lower requirements on the accuracy of the equipment system and good imaging quality, but in order to achieve exposure efficiency, the frame writing mode needs to achieve high-frequency and stable start and stop during the film transmission process.

[0003] At present, the most common film exposure field basically adopts the whole-frame writing method of cameras and camcorders, relying on the film grabbing mechanism to grab the film. However, this method has a long start and stop process and cannot meet the requirements of the flatness stability of the exposure plane, and cannot meet the needs of digital film equipment.

[0004] Therefore, a digital film transmission device is needed urgently to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a digital film transmission device, wherein the film window stabilizes and flattens the digital film to ensure the exposure accuracy, and at the same time, realizes the intermittent start-stop transmission and frame writing mode of the digital film, thereby ensuring stable exposure and writing of the image and improving the writing efficiency.

[0006] In order to solve the above problems existing in the prior art, the utility model adopts the following technical solutions:

[0007] A digital film transmission device, comprising:

[0008] A transmission mechanism, the transmission mechanism comprising a fixed seat, a film window, a driving gear and a driven gear, the film window being arranged on the fixed seat, the film window being used to expose a digital film, the driving gear and the driven gear being rotatably arranged on the fixed seat, the digital film being respectively wound around the driving gear and the driven gear, and the digital film being able to slide and fit on the film window;

[0009] The driving mechanism comprises a driving motor, a dial and a ratchet, wherein the dial is arranged at the output end of the driving motor, the ratchet is connected to the driving gear, and the ratchet is meshedly connected with the dial.

[0010] Preferably, teeth are provided on the periphery of the dial, and two adjacent teeth of the ratchet have tooth grooves. The teeth can rotate and be inserted into or disengaged from the tooth grooves under the action of the driving motor. When the teeth are inserted into the tooth grooves, the teeth can drive the ratchet to rotate, and the driving gear drives the digital film to move relative to the film window. When the teeth are disengaged from the tooth grooves, the ratchet and the driving gear are both fixed.

[0011] Preferably, there are a plurality of teeth, and along the circumferential direction of the dial, the plurality of teeth are arranged at intervals on the outer circumference of the dial.

[0012] Preferably, the dial is detachably connected to the output end of the driving motor.

[0013] Preferably, the drive motor is configured as a servo motor.

[0014] Preferably, the transmission mechanism further comprises an idler wheel, which is rotatably disposed on the fixing seat and is used for winding the digital film.

[0015] Preferably, there are multiple idler gears, and the multiple idler gears are respectively arranged beside the driving gear and the driven gear.

[0016] Preferably, the digital film is provided with a plurality of jacks, the plurality of jacks are arranged at equal intervals along the length of the digital film, and the spacing between two adjacent gear teeth of the driving gear is equal to the spacing between two adjacent jacks.

[0017] Preferably, the driven gear is configured as a damping gear.

[0018] Preferably, the driving mechanism further comprises a coupling, and the coupling is arranged between the dial and the output end of the driving motor.

[0019] The beneficial effects of the utility model are:

[0020] The utility model provides a digital film transmission device, wherein the transmission mechanism includes a fixed seat, a film window, a driving gear and a driven gear, the film window is arranged on the fixed seat, the driving gear and the driven gear are both rotatably arranged on the fixed seat, the digital film is respectively wound around the driving gear and the driven gear, and the digital film can slide and fit on the film window, stabilize and flatten the digital film, and ensure the accuracy of exposure. The driving mechanism includes a driving motor, a dial and a ratchet, the dial is arranged at the output end of the driving motor, the ratchet is connected to the driving gear, and the ratchet is meshed and connected with the dial. The driving motor drives the dial to rotate at a uniform speed, the dial rotates one circle, and the ratchet is rotated one tooth number, the driving gear rotates synchronously with the ratchet at the same speed, drives the digital film to move and stays briefly at the film window, the optical machine exposes the digital film through the film window, completes the writing of one frame of image data, the dial continues to rotate one circle to complete the writing of the next frame of image data of the digital film, and finally completes the exposure process of the entire image of the digital film. The intermittent start-stop transmission and frame writing mode of digital film is realized, which ensures stable exposure and writing of images and improves writing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a digital film transmission device provided by an embodiment of the utility model;

[0022] Figure 2 A schematic diagram of the structure of a driving mechanism provided in an embodiment of the utility model;

[0023] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0024] Reference numerals:

[0025] 1. Fixed seat; 2. Film window; 3. Driving gear; 4. Driven gear; 5. Driving motor; 6. Dial; 61. Meshing teeth; 7. Ratchet; 71. Tooth groove; 8. Coupling. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0030] like Figure 1-Figure 3As shown, in this embodiment, the digital film transmission device includes a transmission mechanism and a driving mechanism. The transmission mechanism includes a fixed seat 1, a film window 2, a driving gear 3 and a driven gear 4. The film window 2 is arranged on the fixed seat 1. The film window 2 is used to expose the digital film. The driving gear 3 and the driven gear 4 are both rotatably arranged on the fixed seat 1. The digital film is respectively wound around the driving gear 3 and the driven gear 4, and the digital film can slide and fit on the film window 2. The driving mechanism includes a driving motor 5, a dial 6 and a ratchet 7. The dial 6 is arranged at the output end of the driving motor 5. The ratchet 7 is connected to the driving gear 3, and the ratchet 7 is meshed with the dial 6. Specifically, the transmission mechanism is located above the driving mechanism. The film window 2 is fixedly installed in the middle position of the fixed seat 1. The driving gear 3 and the driven gear 4 are rotatably arranged on both sides of the film window 2. The two ends of the digital film are respectively wound around the driving gear 3 and the driven gear 4. At the same time, the film window 2 stabilizes and flattens the digital film to ensure the accuracy of exposure. The driving motor 5 is used to provide power to the driving gear 3 of the transmission mechanism. The dial 6 is fixedly sleeved on the output end of the driving motor 5, and the dial 6 is meshed and connected with the ratchet 7. When the driving motor 5 is started, the dial 6 is driven to rotate at a constant speed. The dial 6 rotates one circle and the ratchet 7 is turned by one tooth. The driving gear 3 rotates synchronously with the ratchet 7 at the same speed, driving the digital film to move and stay briefly at the film window 2. The optical machine exposes the digital film through the film window 2 to complete the writing of one frame of image data. The dial 6 continues to rotate one circle to complete the writing of the next frame of image data of the digital film, and finally completes the exposure process of the entire image of the digital film. The intermittent start-stop transmission and frame writing mode of the digital film are realized, which ensures the stable exposure and writing of the image and improves the writing efficiency.

[0031] Further, continue to refer to Figure 1-Figure 3 , the outer periphery of the dial 6 is provided with teeth 61, and two adjacent teeth of the ratchet 7 have tooth grooves 71. The teeth 61 can rotate and be plugged into or out of the tooth grooves 71 under the action of the driving motor 5. When the teeth 61 are plugged into the tooth grooves 71, the teeth 61 can drive the ratchet 7 to rotate, and the driving gear 3 drives the digital film to move relative to the film window 2. When the teeth 61 are out of the tooth grooves 71, the ratchet 7 and the driving gear 3 are both fixed. Specifically, the driving motor 5 is started, driving the dial 6 to rotate at a constant speed, and the dial 6 rotates one circle. The teeth 61 of the dial 6 are disengaged from the tooth grooves 71 of the ratchet 7 and then plugged in to move one tooth number of the ratchet 7. The driving gear 3 and the ratchet 7 rotate synchronously, driving the digital film to move and stay briefly at the film window 2. The optical machine exposes the digital film through the film window 2 to complete the writing of one frame of image data.

[0032] Further, continue to refer to Figure 1-Figure 3, there are multiple teeth 61, and multiple teeth 61 are arranged at intervals on the outer periphery of the dial 6 along the circumferential direction of the dial 6. Specifically, in this embodiment, there are two teeth 61, that is, the dial 6 rotates one circle and moves one tooth of the ratchet 7. Optionally, there are three or more teeth 61, and the dial 6 rotates one circle and moves two or more teeth of the ratchet 7. Then, the writing speed of the digital film increases with the increase in the number of teeth 61, and the transmission distance of the digital film each time can be flexibly configured.

[0033] Further, continue to refer to Figure 1-Figure 3 The dial 6 is detachably connected to the output end of the driving motor 5. Specifically, the dial 6 can be removed from the output end of the driving motor 5 to replace the dial 6 with different numbers of teeth 61. The rotation speed of the driving gear 3 can be flexibly adjusted by using the gear ratio between the ratchet wheel 7 and the dial 6, so as to realize the flexible adjustment of the digital film writing speed.

[0034] Further, continue to refer to Figure 1-Figure 3 , the driving motor 5 is set as a servo motor. Specifically, the servo motor has high motion accuracy and control accuracy, can achieve very precise positioning and motion control, has stable output torque and speed, is not easily affected by the working environment, and has strong stability. At the same time, the servo motor has a fast response speed and can make corresponding actions in a short time.

[0035] Further, continue to refer to Figure 1-Figure 3 The transmission mechanism also includes an idler wheel, which is rotatably arranged on the fixed seat 1 and is used to wind the digital film. Specifically, there are multiple idlers, which are respectively arranged beside the driving gear 3 and the driven gear 4. The two ends of the digital film are respectively wound around the driving gear 3 and the driven gear 4 in a counterclockwise and clockwise direction, and are respectively coordinated through the idlers on their respective sides to ensure that the digital film is tightened and smoothly transmitted.

[0036] Further, continue to refer to Figure 1-Figure 3 A plurality of jacks are arranged on the digital film, and the plurality of jacks are arranged at equal intervals along the length of the digital film. The spacing between two adjacent teeth of the driving gear 3 is equal to the spacing between two adjacent jacks, so that the distance setting of each transmission of the digital film is realized, the stability is good, and the orderly movement and stopping of the film are realized.

[0037] Further, continue to refer to Figure 1-Figure 3 , the driven gear 4 is set as a damping gear. Specifically, the damping of the driven gear 4 is reasonably set to meet the requirement of slightly tightening the digital film through tension, thereby ensuring the accuracy of the digital film.

[0038] Further, continue to refer to Figure 1-Figure 3The driving mechanism also includes a coupling 8, which is arranged between the dial 6 and the output end of the driving motor 5. Under the action of the coupling 8, it is ensured that the dial 6 and the driving motor 5 can rotate synchronously at the same speed.

[0039] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A digital film transmission device, characterized in that: include: A transmission mechanism, the transmission mechanism comprising a fixed seat (1), a film window (2), a driving gear (3) and a driven gear (4), the film window (2) being arranged on the fixed seat (1), the film window (2) being used for exposing a digital film, the driving gear (3) and the driven gear (4) being both rotatably arranged on the fixed seat (1), the digital film being respectively wound around the driving gear (3) and the driven gear (4), and the digital film being able to slide and fit on the film window (2); A driving mechanism, the driving mechanism comprising a driving motor (5), a dial (6) and a ratchet (7), the dial (6) being arranged at the output end of the driving motor (5), the ratchet (7) being connected to the driving gear (3), and the ratchet (7) being meshingly connected with the dial (6).

2. The digital film transmission device according to claim 1, characterized in that: The outer periphery of the dial (6) is provided with teeth (61), and two adjacent teeth of the ratchet wheel (7) have tooth grooves (71). The teeth (61) can rotate and be inserted into or disengaged from the tooth grooves (71) under the action of the driving motor (5). When the teeth (61) are inserted into the tooth grooves (71), the teeth (61) can drive the ratchet wheel (7) to rotate, and the driving gear (3) drives the digital film to move relative to the film window (2). When the teeth (61) are disengaged from the tooth grooves (71), the ratchet wheel (7) and the driving gear (3) are both fixed.

3. The digital film transmission device according to claim 2, characterized in that: There are a plurality of teeth (61), and along the circumferential direction of the dial (6), the plurality of teeth (61) are arranged at intervals on the outer circumference of the dial (6).

4. The digital film transmission device according to claim 1, characterized in that: The dial (6) is detachably connected to the output end of the drive motor (5).

5. The digital film transmission device according to claim 1, characterized in that: The driving motor (5) is configured as a servo motor.

6. The digital film transmission device according to claim 1, characterized in that: The transmission mechanism also includes an idler wheel, which is rotatably arranged on the fixing seat (1) and is used for winding the digital film.

7. The digital film transmission device according to claim 6, characterized in that: There are multiple idler wheels, and the multiple idler wheels are respectively arranged on the sides of the driving gear (3) and the driven gear (4).

8. The digital film transmission device according to claim 1, characterized in that: The digital film is provided with a plurality of jacks, which are arranged at equal intervals along the length of the digital film, and the spacing between two adjacent gear teeth of the driving gear (3) is equal to the spacing between two adjacent jacks.

9. The digital film transmission device according to claim 1, characterized in that: The driven gear (4) is configured as a damping gear.

10. The digital film transmission device according to claim 1, characterized in that: The driving mechanism further comprises a coupling (8), wherein the coupling (8) is arranged between the dial (6) and the output end of the driving motor (5).

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