A light shielding structure of a two-dimensional measuring instrument for reducing environmental light interference

Abstract

The utility model discloses a kind of secondary dimension measuring instrument light shielding structures for reducing ambient light interference, especially in the field of precision optical measuring instrument auxiliary equipment, including secondary dimension measuring instrument, controller is installed in secondary dimension measuring instrument front end, installation shell is connected in secondary dimension measuring instrument upper portion, the outer side of installation shell is slidably connected with frame, the periphery of frame is slidably connected with several light shielding panels, fixed seat is connected in the rear side of installation shell, motor is installed in fixed seat, motor is wiredly connected with the controller, the output shaft of motor is connected with gear, rack is connected in the rear side of frame, gear is engaged with rack, the frame is provided with the stabilizing assembly for locking the light shielding panel. Through the engagement transmission of motor drive gear and rack, frame is driven to slide along installation shell outer wall vertically, so that light shielding panel is unfolded to form closed light shielding area, realize the function of isolating external light, reach the purpose of accurate measurement.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment for precision optical measuring instruments, and in particular to a light-shielding structure for a two-dimensional measuring instrument that reduces ambient light interference. Background Technology

[0002] A 2D measuring instrument is a high-precision two-dimensional measuring device based on the principle of optical imaging, widely used in machining, electronic manufacturing, and precision instrument testing. It captures the two-dimensional contour image of the object being measured through an optical system, and combines image processing algorithms and coordinate system calibration technology to achieve non-contact measurement of geometric parameters such as dimensions, angles, and shapes. It boasts advantages such as high measurement speed, high accuracy, and convenient operation, and has become an indispensable precision measuring tool in industrial quality inspection and scientific research.

[0003] In the operation of existing two-dimensional measuring instruments, in order to obtain clear, high-contrast images of object contours and ensure measurement accuracy, artificial lighting or dedicated light sources are usually required to actively illuminate the object being measured. This active illumination design can highlight the edge features, surface details, or specific areas of the object, and is a fundamental condition for ensuring that the imaging system effectively captures measurement reference points and feature points, especially in the measurement of complex shapes or low-reflectivity objects, where it plays an irreplaceable role.

[0004] However, in real-world industrial settings, the measurement environment often has a rigid requirement for ambient lighting. The light emitted by these ambient sources directly or indirectly illuminates the surface of the object being measured. Especially for objects with smooth surfaces, the surface will specularly or strongly diffusely reflect the incident light from the ambient light, causing some of the reflected light to directly enter the optical imaging system of the two-dimensional measuring instrument. This reflected light will superimpose with the active illumination light, significantly reducing image clarity and contrast, thus leading to deviations or misjudgments in the measurement data. Utility Model Content

[0005] The purpose of this invention is to provide a light-shielding structure for a two-dimensional measuring instrument that reduces ambient light interference, in order to overcome the drawbacks of ambient light interference.

[0006] To achieve the above-mentioned technical effects, this utility model is implemented through the following technical solution: a light-shielding structure for a two-dimensional measuring instrument to reduce ambient light interference, comprising a two-dimensional measuring instrument, a controller installed at the front end of the two-dimensional measuring instrument, a mounting shell connected to the upper part of the two-dimensional measuring instrument, a frame slidably connected to the outer side of the mounting shell, several light-shielding plates slidably connected around the frame, a fixing seat connected to the rear side of the mounting shell, a motor installed on the fixing seat, the motor being wired to the controller, a gear connected to the output shaft of the motor, a rack connected to the rear side of the frame, the gear meshing with the rack, and a stabilizing component for locking the light-shielding plates on the frame.

[0007] Furthermore, the stabilizing component includes a connecting shaft, which is rotatably connected to the outside of the frame. The connecting shaft is connected to a pressure plate, which is in a limiting fit with the light-shielding plate. A fixing groove is opened in the frame, and the light-shielding plate is slidably connected in the fixing groove.

[0008] Furthermore, the bottom of the light-shielding plate is connected to an anti-wear pad.

[0009] Furthermore, a rotating block is coaxially connected to the connecting shaft.

[0010] Furthermore, a protective pad is connected to the side of the pressure plate that contacts the light-shielding plate.

[0011] Furthermore, the outer side of the light-shielding plate is provided with several anti-slip stripes.

[0012] The beneficial effects of this utility model are:

[0013] 1. The motor drives the meshing transmission of gears and racks, causing the frame to slide vertically along the outer wall of the mounting housing, so that the light shield unfolds to form a closed light shielding area, thereby achieving the function of isolating external light and achieving the purpose of accurate measurement.

[0014] 2. By limiting the position of the pressure plate and the light-shielding plate in the stabilizing component, and by increasing the static friction force through the elastic deformation of the protective pad, the light-shielding plate is stably locked within the frame, thereby preventing the light-shielding plate from accidentally falling off or shifting, and achieving the goal of long-term reliability of the light-shielding structure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the installation structure of the motor and gear of this utility model.

[0018] Figure 3 This is a cross-sectional view of the mounting structure of the pressure plate and rotating shaft of this utility model.

[0019] Figure 4 This is a schematic diagram showing the connection relationship between the anti-wear pad and the light-shielding plate of this utility model.

[0020] The names and serial numbers of the components in the figure are as follows: 1. Two-dimensional measuring instrument, 101. Controller, 2. Mounting housing, 3. Frame, 4. Light shield, 5. Fixing base, 6. Motor, 7. Gear, 8. Rack, 9. Pressure plate, 10. Connecting shaft, 11. Fixing groove, 12. Anti-wear pad, 13. Rotating block, 14. Protective pad, 15. Anti-slip stripes. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] Example: A light-shielding structure for a two-dimensional measuring instrument to reduce ambient light interference, see reference. Figures 1 to 4 As shown, the device includes a 2D measuring instrument 1, a controller 101, a mounting housing 2, a frame 3, a light-shielding plate 4, a fixing base 5, a motor 6, a gear 7, a rack 8, and a stabilizing component. The controller 101 is mounted on the front end of the 2D measuring instrument 1. The mounting housing 2 is connected to the upper part of the 2D measuring instrument 1. The frame 3 is slidably connected to the outside of the mounting housing 2. The mounting housing 2 and the frame 3 are fitted with a clearance of 0.5-1mm. Several light-shielding plates 4 are slidably connected around the frame 3. The fixing base 5 is connected to the rear side of the mounting housing 2. The motor 6 is mounted on the fixing base 5. The motor 6 is wired to the controller 101. The output shaft of the motor 6 is connected to the gear 7. The rack 8 is connected to the rear side of the frame 3. The gear 7 meshes with the rack 8. The frame 3 is equipped with a stabilizing component for locking the light-shielding plates 4.

[0023] See Figure 2 and Figure 3 As shown, the stabilizing component includes a pressure plate 9 and a connecting shaft 10. The connecting shaft 10 is rotatably connected to the outside of the frame 3. The pressure plate 9 is connected to the connecting shaft 10. The pressure plate 9 is in a limiting fit with the light shield 4. The pressure plate 9 is made of elastic stainless steel. An arc-shaped transition area is set on the contact surface with the light shield 4. A fixing groove 11 is opened in the frame 3. The light shield 4 is slidably connected in the fixing groove 11.

[0024] See Figure 4 As shown, it also includes an anti-wear pad 12. The bottom of the light shield 4 is connected to the anti-wear pad 12, which is made of polytetrafluoroethylene, effectively reducing the frictional resistance when the light shield 4 slides.

[0025] See Figure 2 and Figure 3 As shown, it also includes a rotating block 13, and the rotating block 13 is coaxially connected to the connecting shaft 10.

[0026] See Figure 3 As shown, it also includes a protective pad 14. The protective pad 14 is connected to the side of the pressure plate 9 that contacts the light shield 4. The protective pad 14 is made of silicone rubber.

[0027] See Figure 2 As shown, it also includes anti-slip stripes 15. Several anti-slip stripes 15 are provided on the outer side of the light shield 4. The anti-slip stripes 15 are distributed in parallel longitudinal directions.

[0028] The operator places the object to be measured stably in the center area of ​​the measurement plane of the 2D measuring instrument 1, and manually adjusts it to ensure that the object's position is aligned with the measurement reference. Then, the controller 101 starts the motor 6, and the output shaft of the motor 6 drives the gear 7 to rotate smoothly along the preset trajectory. The meshing transmission between the gear 7 and the rack 8 pushes the frame 3 to slide vertically downward at a uniform speed along the outer wall of the mounting shell 2. The frame 3 drives the light shield 4 to descend as a whole, forming a closed light-shielding environment for the working area of ​​the 2D measuring instrument 1, effectively isolating external stray light and retaining only the instrument's active illumination light path. This ensures that the light received by the imaging system is a single controllable light source, avoiding image blurring or measurement errors caused by ambient light interference.

[0029] When external auxiliary lighting is needed or the light shield 4 needs cleaning and maintenance, the operator pinches the rotating block 13 with their fingers and rotates it gently. This causes the pressure plate 9 to deflect outwards via the connecting shaft 10, disengaging the pressure plate 9 from the surface of the light shield 4. At this time, the operator can increase grip friction using the anti-slip stripes 15 on the outer side of the light shield 4 and slide the light shield 4 along the pre-set fixing groove 11 within the frame 3. The anti-wear pad 12 acts as a buffer and reduces friction during sliding. The light shield 4 can then be removed and replaced with a frosted or all-black material to suit different measurement scenarios. After adjustment, the light shield 4 is pushed back into the frame 3, and the rotating block 13 is rotated in the opposite direction to re-attach the pressure plate 9 to the outer side of the light shield 4. The protective pad 14 generates appropriate pressure through elastic deformation, ensuring the light shield 4 is securely locked within the frame 3, preventing accidental detachment during operation.

[0030] After the measurement task is completed, the staff operates the motor 6 to rotate in reverse through the controller 101. The gear 7 drives the rack 8 to move upward, and the frame 3, together with the light shield 4, is raised to the initial position, exposing the measurement plane. At this time, the measured object can be safely removed, or a new sample can be prepared for the next round of measurement. The entire light shield structure maintains stable movement during the lifting and lowering process, and the various components cooperate without jamming, ensuring smooth operation and equipment durability.

[0031] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A light-shielding structure for a two-dimensional measuring instrument to reduce ambient light interference, comprising a two-dimensional measuring instrument (1), characterized in that: The two-dimensional measuring instrument (1) is equipped with a controller (101) at the front end. The two-dimensional measuring instrument (1) is connected to a mounting shell (2) at the top. A frame (3) is slidably connected to the outside of the mounting shell (2). Several light-shielding plates (4) are slidably connected around the frame (3). A fixed seat (5) is connected to the rear side of the mounting shell (2). A motor (6) is installed on the fixed seat (5). The motor (6) is wired to the controller (101). A gear (7) is connected to the output shaft of the motor (6). A rack (8) is connected to the rear side of the frame (3). The gear (7) meshes with the rack (8). The frame (3) is provided with a stabilizing component for locking the light-shielding plates (4).

2. The light-shielding structure for a two-dimensional measuring instrument to reduce ambient light interference according to claim 1, characterized in that: The stabilizing component includes a connecting shaft (10), which is rotatably connected to the outside of the frame (3). The connecting shaft (10) is connected to a pressure plate (9), which is in a limiting fit with the light-shielding plate (4). A fixing groove (11) is opened in the frame (3), and the light-shielding plate (4) is slidably connected in the fixing groove (11).

3. The light-shielding structure for a two-dimensional measuring instrument to reduce ambient light interference according to claim 1, characterized in that: The bottom of the light-shielding plate (4) is connected to an anti-wear pad (12).

4. The light-shielding structure for a two-dimensional measuring instrument to reduce ambient light interference according to claim 2, characterized in that: The connecting shaft (10) is coaxially connected to the rotating block (13).

5. The light-shielding structure for a two-dimensional measuring instrument to reduce ambient light interference according to claim 2, characterized in that: A protective pad (14) is connected to the side of the pressure plate (9) that contacts the light shield (4).

6. The light-shielding structure for a two-dimensional measuring instrument to reduce ambient light interference according to claim 1, characterized in that: The outer side of the light-shielding plate (4) is provided with several anti-slip stripes (15).

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