Optical distortion detection system for glass
By designing an optical distortion detection system that automatically adjusts the glass angle, the problem of low testing efficiency caused by manual adjustment was solved, achieving efficient glass optical distortion detection, reducing costs and improving stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2026-03-10
AI Technical Summary
Current methods for detecting optical distortion in automotive glass require manual adjustment of the windshield position, resulting in low testing efficiency.
Design a light distortion detection system that includes a frame, conveyor belt, position adjustment device, projector and imaging device. The position adjustment device automatically adjusts the glass angle, and the projector and imaging device are combined to achieve automatic detection.
It improved glass production efficiency, reduced production costs, and enhanced the stability and imaging quality of testing.
Smart Images
Figure CN223985843U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to glass light distortion detection technical field, in particular to a kind of light distortion detection system for glass. BACKGROUND
[0002] In the production process of existing automobile glass, the light distortion of automobile windshield is usually detected, and the existing glass light distortion detection mode in the market still needs manual participation, and the windshield needs to be adjusted to the appropriate position manually by test personnel, and the test efficiency is low. Therefore, it is urgent to design a detection system capable of automatically adjusting the position of windshield and realizing automatic detection of glass light distortion. UTILITY MODEL CONTENTS
[0003] One object of the utility model is to provide a kind of light distortion detection system for glass, to solve the technical problem of low test efficiency caused by manual adjustment of the position of windshield in the prior art.
[0004] In particular, the utility model provides a kind of light distortion detection system for glass, comprising:
[0005] Rack, curtain station, adjusting station and shooting station are sequentially provided;
[0006] A pair of conveyors are arranged along the extension direction of the rack for transporting the glass to be tested;
[0007] Position adjusting device is arranged at the adjusting station and located between the pair of conveyors, and the position adjusting device at least includes driving mechanism and bracket connected with the driving mechanism, the driving mechanism is arranged to drive the bracket to rise when the glass to be tested moves to the top of the bracket, to lift the glass to be tested, so that the glass to be tested is separated from the conveyor, and the bracket is driven to rotate upward to drive the glass to be tested to rotate upward by a preset angle;
[0008] Curtain is installed at the curtain station;
[0009] Projector is installed below the conveyor and is arranged at the position close to the shooting station, and the projector is arranged to project the preset pattern through the glass to be tested onto the curtain;
[0010] Shooting device is installed at the shooting station for acquiring the preset pattern displayed on the curtain.
[0011] Optionally, the position adjusting device further includes first mounting bracket, and the driving mechanism includes:
[0012] The first driving member is installed on the first mounting frame and has a first output shaft extending out of the first mounting frame. The bracket is located above the first mounting frame and is rotationally connected to the first output shaft. The bracket is also rotationally connected to the first mounting frame. The bracket is configured to rotate and move relative to the first mounting frame when the first output shaft of the first driving member is controlled to extend upward, so that the bracket drives the glass to be tested to rotate upward by the preset angle.
[0013] Optionally, the position adjusting device further comprises:
[0014] At least one sliding rail is installed on the top of the first mounting frame.
[0015] At least one sliding assembly is installed on each sliding rail and is rotationally connected to the bracket.
[0016] Optionally, at least one limiting post is arranged on the bracket, and the limiting post is used for limiting the glass to be tested.
[0017] Optionally, the driving mechanism further comprises:
[0018] A second driving member is connected to the first mounting frame. The second driving member is configured to drive the first mounting frame to move up and down.
[0019] Optionally, the position adjusting device further comprises:
[0020] A second mounting frame is arranged on the periphery of the first mounting frame.
[0021] A bottom plate is installed on the bottom of the first mounting frame and is connected to the first mounting frame. A second output shaft of the second driving member is connected to the bottom plate and can drive the bottom plate to move up and down, thereby driving the first mounting frame to move up and down.
[0022] Optionally, the position adjusting device further comprises:
[0023] A plurality of jacking shafts are respectively connected to the bottom plate and the second mounting frame and move up and down relative to the second mounting frame when the bottom plate moves up and down.
[0024] Optionally, the driving mechanism further comprises a third driving member, and the position adjusting device further comprises:
[0025] A rotating assembly is connected to the first mounting frame and is configured to rotate under the drive of the third driving member, so as to drive the first mounting frame and the bracket to rotate, thereby adjusting the left and right angles of the glass to be tested.
[0026] Optionally, the third driving member is mounted on the bottom plate, the rotating assembly is located between the first mounting frame and the bottom plate, and comprises a first gear and a second gear, the first gear is sleeved on a third output shaft of the third driving member, the second gear comprises a first part and a second part, the first part is engaged with the first gear and connected with the first mounting frame, the second part is located at a middle position of the first part and can rotate relative to the first part, and the second part is connected with the bottom plate.
[0027] Optionally, the system further comprises:
[0028] a control box mounted beside the rack and connected with the driving mechanism, the projector and the photographing device.
[0029] The position adjusting device is located between a pair of conveying belts, and at least comprises a driving mechanism and a bracket connected with the driving mechanism, the driving mechanism is arranged to drive the bracket to ascend when the glass to be measured moves to the top of the bracket, so as to lift the glass to be measured, and make the glass to be measured separate from the conveying belt, and the driving mechanism is arranged to drive the bracket to rotate upward, so as to drive the glass to be measured to rotate upward by a preset angle. The projector can project the preset pattern through the glass to the curtain, and the photographing device can obtain the preset pattern displayed on the curtain. The above technical scheme adopts the position adjusting device to automatically adjust the angle of the glass to be measured, and combines the photographing device, the projector and the curtain to realize automatic detection of the optical distortion of the glass, improve the production efficiency of the glass, and reduce the production cost. In addition, since the angle of the glass to be measured is automatically adjusted, the stability is good, and the photographing effect can be improved.
[0030] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of some embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0031] Some embodiments of the present application will now be described, by way of example only, with reference to the accompanying drawings. Identical or similar components or parts are referred to using the same reference numerals throughout the drawings. It is to be understood that the drawings are not necessarily to scale. In the drawings:
[0032] Figure 1 is a schematic structural view of an optical distortion detection system according to an embodiment of the present application;
[0033] Figure 2 is Figure 1 a schematic structural view of a position adjusting device of the detection system shown in FIG. 1;
[0034] Figure 3 is Figure 1A schematic side view of the position adjustment device of the detection system shown;
[0035] Figure 4 yes Figure 2 A schematic structural diagram of the slide rail and sliding assembly of the position adjustment device shown;
[0036] Figure 5 yes Figure 2 A schematic structural diagram of the rotating assembly of the position adjustment device shown;
[0037] Figure 6 yes Figure 2 A schematic partial cross-sectional view of the position adjustment device shown.
[0038] Figure label:
[0039] 1000 - Optical Distortion Detection System; 2000 - Glass Under Test; 100 - Position Adjustment Device; 200 - Screen; 300 - Imaging Device; 310 - Camera; 320 - Gantry Frame; 400 - Rack; 500 - Conveyor Belt; 600 - Control Box; 700 - Projector; 10 - Bracket; 20 - Drive Mechanism; 30 - Second Mounting Frame; 40 - First Mounting Frame; 41 - Top Plate; 50 - Base Plate; 60 - Lifting Shaft 70-Rotating assembly, 21-Second driving component, 22-First driving component, 23-Third driving component, 11-Limiting post, 80-Slide rail, 90-Sliding assembly, 91-Slider, 92-Fisheye bearing, 221-First output shaft, 71-First gear, 72-Second gear, 721-First part, 722-Second part, 211-Second output shaft, 231-Third output shaft, 41-Sensing plate, 51-Sensing block. Detailed Implementation
[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0041] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0042] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0043] 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 at least one of that feature, that is, include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.
[0044] Unless otherwise expressly specified and limited, the terms "connection," "installation," 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, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0045] Unless otherwise specified, all terms (including technical and scientific terms) used in the description of this embodiment have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0046] Figure 1 This is a schematic structural diagram of an optical distortion detection system 1000 according to an embodiment of the present invention. Figure 2 yes Figure 1 A schematic structural diagram of the position adjustment device 100 of the detection system 1000 shown. Figure 1 and Figure 2As shown, in one specific embodiment, the optical distortion detection system 1000 for glass includes a frame 400, a pair of conveyor belts 500, a screen 200, a position adjustment device 100, a projector 700, and an imaging device 300. The frame 400 is sequentially provided with a screen station, an adjustment station, and an imaging station. The pair of conveyor belts 500 are arranged along the extension direction of the frame 400 for transporting the glass 2000 to be tested. The screen 200 is installed at the screen station. A position adjustment device 100 is disposed at an adjustment station, located between a pair of conveyor belts 500. The position adjustment device 100 includes at least a drive mechanism 20 and a bracket 10 connected to the drive mechanism 20. The drive mechanism 20 is configured to controllably drive the bracket 10 to rise when the glass under test 2000 moves to the top of the bracket 10, thereby lifting the glass under test 2000 and disengaging it from the pair of conveyor belts 500. The drive mechanism 20 is also configured to controllably drive the bracket 10 to rotate upwards, thereby rotating the glass under test 2000 upwards by a preset angle. A projector 700 is mounted below the conveyor belts 500 and positioned near the shooting station. The projector 700 is configured to controllably project a preset pattern through the glass under test 2000 onto a screen 200. A shooting device 300 is mounted at the shooting station to capture the preset pattern displayed on the screen 200. Here, the preset angle can be determined according to specific design requirements, such as 45°, 50°, 55°, 60°, 65°, 70°, etc., ensuring that the preset pattern of the projector 700 can pass through the glass under test 2000. The software system can compare the preset pattern displayed on the screen 200 obtained by the camera device 300 with the standard pattern to determine whether the glass under test 2000 is qualified.
[0047] This embodiment employs a position adjustment device 100 to automatically adjust the angle of the glass under test 2000. Combined with an imaging device 300, a projector 700, and a screen 200, it achieves automatic detection of glass optical distortion, improving glass production efficiency and reducing production costs. Furthermore, due to the automatic adjustment of the glass's angle, stability is better, which improves the imaging effect.
[0048] See Figure 1 The shooting device 300 includes a camera 310 and a gantry 320. The gantry 320 is mounted on both sides of the frame 400, and the camera 310 is mounted on the top of the gantry 320.
[0049] Figure 3 yes Figure 1 A schematic side view of the position adjustment device 100 of the detection system 1000 shown. Figure 3 As shown, and see Figure 2In some embodiments, the position adjustment device 100 further includes a first mounting bracket 40, and the drive mechanism 20 includes a first drive member 22, which is mounted on the first mounting bracket 40 and has a first output shaft 221 extending out of the first mounting bracket 40. A bracket 10 is located above the first mounting bracket 40 and rotatably connected to the first output shaft 221. The bracket 10 is also rotatably connected to the first mounting bracket 40. The bracket 10 is configured to drive the bracket to rotate and move relative to the first mounting bracket 40 when the first output shaft 221 of the first drive member 22 extends upward in a controlled manner, thereby causing the bracket 10 to rotate the glass 2000 under test upward by a preset angle. Here, the first drive member 22 is an electric cylinder, the first mounting bracket 40 is cuboid, and the first drive member 22 is located inside the first mounting bracket 40. The first mounting bracket 40 has a top plate 41, and the first drive member 22 is fixed to the top plate 41.
[0050] Figure 4 yes Figure 2 The diagram shows a schematic structural representation of the slide rail 80 and sliding assembly 90 of the position adjustment device 100. Figure 4 As shown, the position adjustment device 100 further includes at least one slide rail 80 and at least one sliding assembly 90. The slide rail 80 is mounted on the top of the first mounting bracket 40, and each sliding assembly 90 is mounted on one slide rail 80 and rotatably connected to the bracket 10. Here, the slide rail 80 is mounted on the top plate 41. The sliding assembly 90 includes a slider 91 and a fisheye bearing 92. The slider 91 is mounted on the slide rail 80 and can slide along the slide rail 80, and the fisheye bearing 92 is mounted on the slider 91 and rotatably connected to the bracket 10. It can be understood that when the first driving member 22 lifts the bracket 10, the slider 91 slides along the slide rail 80, thereby realizing the upward rotation of the bracket 10.
[0051] In one embodiment, there are two slide rails 80 and two sliding components 90, with the two slide rails 80 arranged parallel and spaced apart. This embodiment uses two slide rails 80 and two sliding components 90 to improve the stability of the bracket 10 during rotation. In other embodiments, the number of slide rails 80 and sliding components 90 can be determined according to specific design requirements.
[0052] In some embodiments, the bracket 10 is provided with at least one limiting post 11, which is used to limit the glass 2000 to be tested and prevent it from slipping off the bracket 10. In a preferred embodiment, there are multiple limiting posts 11, which can better limit the glass 2000 to be tested. The bracket 10 can be compatible with glass 2000s of different sizes.
[0053] In some embodiments, the drive mechanism 20 further includes a second drive member 21, which is connected to the first mounting bracket 40 and configured to controllably drive the first mounting bracket 40 to move up and down. Here, the second drive member 21 is a cylinder. Since the first drive member 22 is connected to the first mounting bracket 40, and the bracket 10 is also connected to the first mounting bracket 40, when the second drive member 21 drives the first mounting bracket 40 to move up and down, it can also drive the first drive member 22 and the bracket 10 to move up and down.
[0054] In some embodiments, the position adjustment device 100 further includes a second mounting bracket 30 and a base plate 50. The second mounting bracket 30 is disposed around the periphery of the first mounting bracket 40. The base plate 50 is mounted on the bottom of the first mounting bracket 40 and connected to it. The second output shaft 211 of the second drive member 21 is connected to the base plate 50 and can drive the base plate 50 to move up and down relative to the second mounting bracket 30, thereby causing the first mounting bracket 40 to move up and down. It can be understood that the second mounting bracket 30 is fixed, and the second drive member 21 can drive the base plate 50 and the first mounting bracket 40 to move up and down.
[0055] In some embodiments, the position adjustment device 100 further includes a plurality of lifting shafts 60, which are respectively connected to the base plate 50 and the second mounting bracket 30, and move vertically relative to the second mounting bracket 30 when the base plate 50 moves vertically. In some embodiments, the number of lifting shafts 60 is four, and the four lifting shafts 60 are evenly arranged. In other embodiments, the number of lifting shafts 60 can be determined according to specific design requirements.
[0056] Figure 5 yes Figure 2 The diagram shows a schematic structural representation of the rotating assembly of the position adjustment device. Figure 6 yes Figure 2 A schematic partial cross-sectional view of the position adjustment device shown. Figure 5 and Figure 6 As shown, in some embodiments, the drive mechanism 20 further includes a third drive member 23, and the position adjustment device 100 further includes a rotating assembly 70. The rotating assembly 70 is connected to the first mounting bracket 40 and is configured to rotate under the drive of the third drive member 23, thereby driving the first mounting bracket 40 and the bracket 10 to rotate, so as to adjust the left and right angles of the glass under test 2000. Here, the third drive member 23 is a servo motor. This embodiment can not only adjust the angle of the glass under test 2000 in the vertical direction, but also adjust the angle of the glass under test 2000 in the left and right direction, which can better detect optical distortion of the glass under test 2000.
[0057] In some embodiments, the third drive member 23 is mounted on the base plate 50, and the rotating assembly 70 is located between the first mounting bracket 40 and the base plate 50, and includes a first gear 71 and a second gear 72. The first gear 71 is sleeved on the third output shaft 231 of the third drive member 23, and the second gear 72 includes a first part 721 and a second part 722. The first part 721 meshes with the first gear 71 and is connected to the first mounting bracket 40, and the second part 722 is located at the middle position of the first part 721 and can rotate relative to the first part 722. The second part 722 is connected to the base plate 50. It can be understood that the third drive member 23 drives the first gear 71 to rotate, and the first gear 71 drives the first part 721 of the second gear 72 to rotate relative to the second part 722. Since the first part 721 is connected to the first mounting bracket 40 and the second part 722 is connected to the base plate 50, the second part 722 remains stationary, while the first part 721 drives the first mounting bracket 40 to rotate. In other embodiments, the structure of the rotating assembly 70 can be determined according to specific design requirements.
[0058] In some embodiments, at least one sensing plate 41 is mounted on the bottom of the first mounting bracket 40, and at least one sensing block 51 is mounted on the base plate 50. When the first mounting bracket 40 rotates until the sensing plate 41 is located in the groove of the sensing block 51, a signal is triggered, indicating that the first mounting bracket 40 has rotated to the correct position. In this embodiment, there are multiple sensing blocks 51, which are arranged at intervals on the base plate 50. The sensing blocks 51 can be set according to the target position that the glass 2000 to be tested needs to rotate to.
[0059] This embodiment can limit the left and right rotation angle of the first mounting bracket 40 by setting the sensing sheet 41 and the sensing block 51.
[0060] In some embodiments, the optical distortion detection system 1000 further includes a control box 600, which is mounted beside the frame 400 and connected to the drive mechanism 20 and the imaging device 300. The control box 600 is connected to the first drive member 22, the second drive member 21, and the third drive member 23, and is used to control these drive members. A sensor is installed at the adjustment station and connected to the control box 600. When the sensor detects that the glass under test 2000 has moved to the adjustment station, it sends a signal to the control box 600, which then controls the motor of the conveyor belt 500 to stop driving the conveyor belt 500.
[0061] Working principle of the 1000 system for detecting optical distortion in glass:
[0062] Multiple glass samples 2000 to be tested are conveyed on conveyor belt 500. When the sensor detects that a glass sample 2000 has moved to the adjustment position, the control box 600 controls the motor to stop driving the conveyor belt 500. Then, it controls the first drive unit 22 to lift the bracket 10, causing the glass sample 2000 to be tested to detach from the conveyor belt 500. Then, it controls the second drive unit 21 to drive the bracket 10 to rotate upward, causing the glass sample 2000 to tilt upward at a preset angle. Afterward, the control box 600 controls the projector 700 to display a preset pattern through the glass sample 2000 onto the screen 200, and controls the imaging device 300 to capture the preset pattern displayed on the screen 200. Then, the control box 600 controls the third drive unit 23 to rotate the first mounting bracket 40 to adjust the angle of the first mounting bracket 40 in the left and right directions, and controls the imaging device 300 to continue capturing the preset pattern displayed on the screen 200. The software system then compares the preset pattern on the screen 200 with the standard pattern to determine whether the glass under test 2000 is qualified, thus realizing the optical distortion detection of the glass under test 2000. After the glass under test 2000 has been detected, the control box 600 moves the glass under test 2000 back to its original position, that is, moves the glass under test 2000 back onto the conveyor belt 500. Then, the control box 600 controls the motor to drive the conveyor belt 500 to transport the glass under test 2000 to the next workstation. When the next glass under test 2000 is transported to the adjustment station, the above process continues to realize the optical distortion detection of the next glass under test 2000.
[0063] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.
Claims
1. A light distortion detection system for glass, characterized by, The system comprises: a rack provided with a curtain station, an adjusting station and a shooting station in sequence; a pair of conveyors arranged along the extension direction of the rack for transporting the glass to be tested; a position adjusting device arranged at the adjusting station and located between the pair of conveyors, the position adjusting device comprising at least a driving mechanism and a bracket connected with the driving mechanism, the driving mechanism being arranged to drive the bracket to ascend when the glass to be tested moves to the top of the bracket, so as to lift the glass to be tested off the conveyors and drive the bracket to rotate upwardly to rotate the glass to be tested by a preset angle; a curtain installed at the curtain station; a projector installed below the conveyors and arranged close to the shooting station, the projector being arranged to project a preset pattern through the glass to be tested onto the curtain; a shooting device installed at the shooting station for acquiring the preset pattern displayed on the curtain.
2. The optical distortion detection system of claim 1, wherein, The position adjusting device further comprises a first mounting frame, and the driving mechanism comprises: a first driving member installed on the first mounting frame and having a first output shaft extending out of the first mounting frame, the bracket being located above the first mounting frame and rotationally connected with the first output shaft, the bracket being further rotationally connected with the first mounting frame, the bracket being arranged to rotate and move relative to the first mounting frame when the first output shaft of the first driving member is controlled to extend upwardly, so as to rotate the glass to be tested by the preset angle.
3. The optical distortion detection system of claim 2, wherein, The position adjusting device further comprises: at least one slide rail installed on the top of the first mounting frame; at least one sliding assembly, each of which is installed on one of the slide rails and rotationally connected with the bracket.
4. The light distortion detection system according to claim 3, wherein at least one limiting post is arranged on the bracket for limiting the glass to be tested.
5. The optical distortion detection system of any of claims 2-4, wherein, The driving mechanism further comprises: a second driving member connected with the first mounting frame, the second driving member being arranged to drive the first mounting frame to move up and down.
6. The optical distortion detection system of claim 5, wherein, The position adjusting device further comprises: a second mounting frame arranged at the periphery of the first mounting frame; a bottom plate installed on the bottom of the first mounting frame and connected with the first mounting frame, a second output shaft of the second driving member being connected with the bottom plate and capable of driving the bottom plate to move up and down relative to the second mounting frame, so as to drive the first mounting frame to move up and down.
7. The optical distortion detection system of claim 6, wherein, The position adjusting device further comprises: a plurality of lifting shafts respectively connected with the bottom plate and the second mounting frame and arranged to move up and down relative to the second mounting frame when the bottom plate moves up and down.
8. The optical distortion detection system of claim 7, wherein, The driving mechanism further comprises a third driving member, and the position adjusting device further comprises: a rotating assembly connected with the first mounting frame and arranged to rotate under the drive of the third driving member, so as to drive the first mounting frame and the bracket to rotate, so as to adjust the left-right angle of the glass to be tested.
9. The optical distortion detection system of claim 8, wherein: the third driving member is mounted on the bottom plate, the rotating assembly is located between the first mounting frame and the bottom plate, and comprises a first gear and a second gear, the first gear is sleeved on a third output shaft of the third driving member, the second gear comprises a first part and a second part, the first part is engaged with the first gear and connected with the first mounting frame, the second part is located at a middle position of the first part and can rotate relative to the first part, and the second part is connected with the bottom plate.
10. The optical distortion detection system of any of claims 1-4, 6-9, wherein, Further comprising: a control box mounted beside the rack and connected with the driving mechanism, the projector and the shooting device.