An illuminance measuring instrument

Abstract

The application relates to the field of measuring instruments, in particular to a light intensity measuring instrument, which comprises a machine body, a photosensitive element, a digital display screen, a sound amplification element and a protective cover are connected to the machine body, and a limiting piece is further connected to the machine body and corresponds to the protective cover; the limiting piece drives the protective cover to correspondingly abut on the photosensitive element, effective covering is formed, accidental damage of the photosensitive element in daily use or transportation process is avoided, and cooperation between a guide sliding groove arranged on the machine body and a driven sliding block allows the photosensitive element to have a certain range of displacement, measurement of the same light source at different positions is realized, and the problem that it is difficult to accurately observe the measurement data due to the change of the position of the staff following the instrument is avoided.

Description

Technical Field

[0001] This invention relates to the field of measuring instruments, and particularly to a light intensity measuring instrument. Background Technology

[0002] In ophthalmology, measuring illuminance using instruments is a crucial and challenging task. To accurately assess the impact of light intensity on ocular tissues, researchers and clinicians need to precisely determine the intensity of light entering the eye from the instrument's light source. Different intensities of light can have varying effects on the eye; for example, excessive light can damage tissues such as the retina. Accurate measurement provides crucial information for research and clinical diagnosis and treatment, ensuring the safety and scientific rigor of related procedures. While current illuminance measurement technology has advanced, it still has shortcomings in some key areas, such as insufficient measurement accuracy, operational complexity, and poor portability.

[0003] With the development of technology, technicians in related fields have also made a lot of optimizations to the technical means used for measuring illuminance. In order to make more accurate comparisons, Chinese Patent No. CN211783855U discloses a digital illuminance meter, including an illuminance meter body, a collector, a connecting wire, a connector, and an elastic band. When in use, the user's wrist passes through the space to wear the illuminance meter body on the wrist, while the user holds the collector with the same hand. After the data is measured, the other hand can record the data, thereby improving the convenience of using the illuminance meter.

[0004] However, the above-mentioned measuring device still has some shortcomings in actual use:

[0005] The aforementioned device involves strapping the illuminance meter to one of the user's wrists, with that hand holding the collector for illuminance measurement while the other hand records the data. However, because the user must always have one hand holding the collector during use, and the hand holding the collector needs to constantly change position when collecting illuminance data from different positions relative to the light source, the user must also change their own position to follow the collector's movement. If the user does not change their position in time, it is easy to have difficulty accurately observing the measured illuminance data due to angle issues. Furthermore, the aforementioned device does not protect the illuminance meter during illuminance detection, which can easily damage the outer surface of the detector and affect the measurement accuracy.

[0006] Therefore, based on the above-stated viewpoints, there is still room for improvement in existing techniques for measuring illuminance. Summary of the Invention

[0007] To address the aforementioned problems, this invention provides a light intensity measuring instrument, comprising a body, on which a photosensitive element, a digital display screen, a sound amplification element, and a protective cover are connected. A limiting component is also connected to the body corresponding to the protective cover. The limiting component includes:

[0008] The connecting frame is connected to the protective cover and is located on the body.

[0009] The elastic end is located between the connecting frame and the body to provide the connecting frame with a preload force that holds the protective cover at the photosensitive element.

[0010] The stop block is connected to the limiting position of the connecting frame, and a limiting groove is formed on the body corresponding to the stop block.

[0011] Preferably, the machine body has a hollow cavity, in which a battery element is electrically connected to a photosensitive element, a sound amplification element, and a digital display screen. The machine body also has a control switch electrically connected to the battery element. A processor is also electrically connected to the battery element in the cavity to control the photosensitive element and the digital display screen.

[0012] Preferably, the cavity is further provided with signal elements that are electrically connected to the battery element and the processor, respectively.

[0013] Preferably, the protective cover includes at least two protective shells symmetrically abutting against the upper side of the photosensitive element, the two protective shells abutting against each other to form a cover for the photosensitive element.

[0014] Preferably, the connecting frame includes two connecting guide rods corresponding to the two protective shells, a stop block connected to the connecting guide rods, two ends of the elastic end connected to the two connecting guide rods respectively and attached to the machine body, and an extension guide rod that is limited on the machine body is provided at the end of the connecting guide rod away from the protective shell.

[0015] Preferably, the extended guide rod is connected to a driven slider located on the machine body, and a guide groove is formed on the machine body corresponding to the driven slider.

[0016] Preferably, the limiting groove is bent to restrict and guide the sliding path of the stop block.

[0017] Preferably, the connecting guide rod includes a sliding sleeve that is limited and sleeved on the outside of the extension guide rod. The end of the sliding sleeve that is away from the extension guide rod is connected to the protective shell through the support guide rod. The sliding sleeve is connected to the elastic end. The sliding sleeve is hinged to the support guide rod. The support guide rod is connected to the stop block and the protective shell.

[0018] Preferably, both the sliding sleeve and the support guide rod are bent.

[0019] Preferably, the bent section of the support guide rod is spaced apart from the machine body.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] I. This invention uses a limiting component to drive the protective cover to abut against the photosensitive element, forming an effective cover and preventing accidental damage to the photosensitive element during daily use or transportation. Furthermore, the cooperation between the guide groove and the driven slider on the machine body allows the photosensitive element to shift to a certain extent, enabling measurements of the same light source at different positions. This avoids the problem of operators having to change their own position to follow the instrument, which would make it difficult to accurately observe the measurement data.

[0022] Second, by coordinating the digital display screen, signal elements, and amplification elements on the machine body with the photosensitive elements, this invention can assist staff in observing and measuring data while broadcasting the measured results, so that staff can confirm the accuracy of the measured data a second time, and upload the data to external terminal equipment for unified data collection and analysis.

[0023] Third, the present invention enables the machine body to perform illuminance measurement and confirmation at different positions relative to the same instrument light source by setting a limiting component and cooperating with the machine body. At the same time, the machine body is limited during the adjustment of its position, which improves the stability of the machine body when changing its position and posture, thereby improving the accuracy of the measurement data. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram of the structure of the present invention.

[0026] Figure 2 This is a schematic diagram of the processor of the present invention.

[0027] Figure 3 This is a schematic diagram of the structure of the protective cover of the present invention.

[0028] Figure 4 This is the present invention. Figure 3 A magnified view of A in the middle.

[0029] Figure 5 This is a schematic diagram of the driven slider of the present invention.

[0030] Figure 6 This is a schematic diagram of the adjusting gear of the present invention.

[0031] Figure 7 This is a diagram illustrating one embodiment of the present invention.

[0032] Figure 8 This is a schematic diagram of the connecting guide rod of the present invention.

[0033] Figure 9 This is the present invention. Figure 8 A magnified view of B in the middle.

[0034] Figure 10 This is a diagram illustrating another embodiment of the present invention.

[0035] Figure 11 This is an electrical wiring diagram between the internal components of this invention.

[0036] In the diagram, 1. Body; 10. Photosensitive element; 11. Digital display screen; 12. Amplifying element; 13. Protective cover; 130. Protective shell; 14. Battery element; 15. Control switch; 16. Processor; 17. Signal element; 2. Limiting component; 20. Connecting frame; 200. Connecting guide rod; 2001. Sliding sleeve rod; 2002. Supporting guide rod; 201. Extension guide rod; 21. Elastic end; 22. Stop block; 23. Limiting slide groove; 24. Driven slider; 240. Guide slide groove; 25. Limiting sleeve; 250. Limiting through groove; 26. Adjusting gear; 260. Driven gear; 27. Hinge seat; 270. Ball shaft rod. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1 To be continued Figure 11 The embodiments of the present invention will be described in detail below.

[0038] This application discloses a illuminance measuring instrument. This application is mainly used in the process of measuring and confirming the illuminance of light sources from other instruments. Technically, it achieves the effect of measuring and confirming the illuminance of the light source through the measurement of a photosensitive element. Specifically, during the measurement process, through the cooperation of the photosensitive element, digital display screen, amplification element, battery element, processor, and signal element, the measured illuminance data is displayed on the digital display screen for staff to view and record. The measured data is also broadcast aloud to avoid recording errors by staff, and secondary confirmation ensures the accuracy of the measurement data. Then, the measured data is uploaded to the terminal device through the signal element, facilitating user analysis and summarization. Furthermore, this application also uses the cooperation between a limiting member and a protective cover to protect the photosensitive element, preventing accidental damage to the photosensitive element from affecting the measurement data.

[0039] Example 1: Refer to Figure 1 and Figure 2As shown, a illuminance measuring instrument includes a body 1, on which a photosensitive element 10, a digital display screen 11, a loudspeaker 12, and a protective cover 13 are connected. A limiting member 2 is also connected to the protective cover 13 on the body 1. In the initial state, the limiting member 2 drives the protective cover 13 to abut against the photosensitive element 10, thus providing coverage and protection for the photosensitive element 10 under normal conditions, preventing accidental damage to the photosensitive element 10 and resulting abnormal measurement data. It should be noted that the photosensitive element 10 is a conventional device for confirming illuminance measurement, generally composed of a photosensitive battery, and the loudspeaker 12 is a conventional loudspeaker or similar device used for broadcasting data; further details are omitted here.

[0040] When it is necessary to measure the illuminance of the instrument light source, the entire device is moved to the instrument light source. The limiting member 2 drives the protective cover 13 to release the obstruction of the photosensitive element 10, and the photosensitive element 10 is made to face the instrument light source. Then the instrument light source is driven to illuminate the photosensitive element 10. The photosensitive element 10 converts the light energy irradiated by the instrument light source into electrical energy and outputs a digital signal to the digital display screen 11. At the same time, it outputs a signal to the amplification element 12 to announce the numbers displayed on the digital display screen 11 so that the staff can collect data.

[0041] Furthermore, referring to Figure 2 As shown, in order to process the electrical energy converted by the photosensitive element 10 to output signals to the digital display screen 11 and the sound amplifier 12, the body 1 has a hollow cavity. A battery element 14 is installed in the cavity and is electrically connected to the photosensitive element 10, the sound amplifier 12 and the digital display screen 11. A control switch 15, which is electrically connected to the battery element 14, is also installed on the body 1. A processor 16 is installed in the cavity and is electrically connected to the battery element 14, the photosensitive element 10 and the digital display screen 11 to control the photosensitive element 10 and the digital display screen 11.

[0042] In use, after the protective cover 13 is detached from the photosensitive element 10, the control switch 15 is turned on to start the device. After the instrument light source shines on the photosensitive element 10, the photosensitive element 10 converts light energy into electrical energy and outputs it to the processor 16 for further processing and calculation, so that the converted electrical energy is output as a digital signal. The processed data is converted into illuminance values ​​and displayed on the instrument's digital display screen 11. At the same time, it is broadcast through the loudspeaker 12 so that the staff can record the measured illuminance data.

[0043] Furthermore, as an optional implementation method, refer to Figure 2As shown, a signal element 17 is also provided inside the cavity, which is electrically connected to the battery element 14 and the processor 16 respectively. The signal element 17 is preferably a Bluetooth module, which is connected to an external terminal device for data transmission and recording. In use, after the illuminance measurement of the instrument's light source is completed, the measured illuminance value is displayed on the digital display screen 11 and the terminal device. At the same time, the sound amplification element 12 announces the result, and the measurement value is transmitted to the applet through the signal element 17 for unified data recording.

[0044] Of course, as an optional implementation, when this device is applied in a medical setting, the amplification element 12 can also be removed to reduce interference and improve product flexibility.

[0045] Reference Figure 3 and Figure 7 As shown, the protective cover 13 includes at least two protective shells 130 symmetrically abutting against the upper side of the photosensitive element 10. The protective shells 130 are preferably made of a light-shielding material with low light transmittance, such as ABS black engineering plastic, to protect the photosensitive element 10 in normal operation. The two protective shells 130 abut against each other to cover the photosensitive element 10. One end of each protective shell 130 near the photosensitive element 10 is recessed inward to form a groove that abuts against the outer edge of the photosensitive element 10. When the photosensitive element 10 is not needed, the connecting frame 20 and the elastic end 21 drive the two protective shells 130 to abut against each other to cover the photosensitive element 10. When measurement is required, the connecting frame 20 drives the two protective shells 130 to detach from the photosensitive element 10, thus promptly removing the cover and completing the measurement of the instrument's light source illuminance.

[0046] Furthermore, referring to Figures 3 to 5 As shown, the connecting frame 20 includes two connecting guide rods 200 corresponding to the two protective shells 130. The stop block 22 is connected to the connecting guide rods 200. The two ends of the elastic end 21 are respectively connected to the two connecting guide rods 200 and fit against the body 1. The end of the connecting guide rod 200 away from the protective shell 130 is provided with an extension guide rod 201 that is limited on the body 1. As an optional embodiment, the elastic end 21 is preferably provided with an elastic band or spring. At the same time, a limiting block is provided between the extension guide rod 201 and the connecting guide rod 200. The limiting block is slidably connected to the connecting guide rod 200 to limit the relative sliding range between the connecting guide rod 200 and the extension guide rod 201, so as to prevent the connecting guide rod 200 from accidentally disengaging from the extension protrusion.

[0047] When it is necessary to remove the cover of the photosensitive element 10, the two connecting guide rods 200 are driven to slide in opposite directions. The connecting guide rods 200 slide axially along the extension guide rod 201, and the elastic end 21 is stretched. The movement of the connecting guide rods 200 also drives the connected protective shells 130 to slide synchronously, so that both protective shells 130 are disengaged from the photosensitive element 10, so that the light source at the instrument can illuminate the photosensitive element 10.

[0048] Furthermore, referring to Figures 3 to 5 As shown, to improve the accuracy of measurement data, a driven slider 24 located on the body 1 is connected to the extension guide rod 201. A guide groove 240 is formed on the body 1 corresponding to the driven slider 24. In use, after removing the cover from the photosensitive element 10, the body 1 is driven to slide the photosensitive element 10, so that the guide groove 240 and the driven slider 24 slide relative to each other. This allows the photosensitive element 10 to measure the illuminance of the same light source from different positions, improving the applicability of the measurement data and further improving the accuracy of the instrument's light source illuminance measurement data.

[0049] As a feasible implementation method, when the elastic end 21 is an elastic band, during use, after the two connecting guide rods 200 drive the connected protective shell 130 to detach from the photosensitive element 10, the elastic end 21 is stretched further away from the body 1 so that there is a distance between the elastic end 21 and the body 1. Then, the operator passes his arm through the gap. At this time, the stretched elastic end 21 tends to restore its normal elastic extension and press against the operator's arm, thus confining the entire body 1 to the operator's arm.

[0050] Then, the machine body 1 is driven to slide the photosensitive element 10 so that the guide slide 240 and the driven slider 24 slide relative to each other, thereby adjusting the relative position of the photosensitive element 10 and the light source on the same horizontal plane, so that the photosensitive element 10 can simulate the state of patients of different heights using the instrument for detection, further improving the accuracy and applicability of data measurement.

[0051] Reference Figures 2 to 5 As shown, the limiting member 2 includes:

[0052] The connecting frame 20 is connected to the protective cover 13 and is located on the body 1.

[0053] The elastic end 21 is located between the connecting frame 20 and the body 1 to provide the connecting frame 20 with a preload force that limits the protective cover 13 to the photosensitive element 10.

[0054] The stop block 22 is connected to the connecting frame 20 for limiting, and a limiting groove 23 is formed on the body 1 corresponding to the stop block 22.

[0055] In use, through the cooperation between the elastic end 21 and the connecting frame 20, when the photosensitive element 10 is not needed in daily use, the protective shell 130 can be driven to protect the photosensitive element 10 in time. When the photosensitive element 10 needs to be used for measurement, the restriction on the photosensitive element 10 can be quickly released so that the staff can use the device to measure and confirm the illuminance. At the same time, the overall size of the device is reduced so that the staff can carry and store it.

[0056] Reference Figure 3 and Figure 4 As shown, the limiting slide 23 is bent, and the horizontal section of the limiting slide 23 is in a relatively perpendicular position to the connecting guide rod 200, so as to restrict the stop block 22, the connecting guide rod 200, the extension guide rod 201 and the driven slider 24 to slide along the guide slide 240 in the initial state, thereby limiting the two protective shells 130 to the photosensitive element 10 to form a covering effect on the photosensitive element 10. The other vertical section of the same limiting slide 23 is parallel to the connecting guide rod 200 and extends out of the body 1.

[0057] In use, the two connecting guide rods 200, the protective shell 130, and the stop block 22 are driven to slide away from each other. The stop block 22 is driven to slide along the horizontal section of the limiting slide groove 23. After the stop block 22 slides to the end of the horizontal section of the same limiting slide groove 23, that is, after both protective shells 130 are separated from the photosensitive element 10, the connecting guide rods 200, the protective shell 130, the extension guide rod 201, the driven slider 24, and the stop block 22 are driven to slide away from the body 1. That is, the driven slider 24 is driven to slide along the guide slide groove 240, while the stop block slides along the vertical section of the limiting slide groove 23, so that the two protective shells 130 are further separated from the photosensitive element 10.

[0058] Reference Figures 6 to 9 As shown, the connecting guide rod 200 includes a sliding sleeve 2001 that is limited and sleeved on the outside of the extension guide rod 201. The sliding sleeve 2001 should preferably be pre-treated with a plating and lubricated to improve its service life. The end of the sliding sleeve 2001 away from the extension guide rod 201 is connected to the protective shell 130 through the support guide rod 2002. The sliding sleeve 2001 is connected to the elastic end 21. The sliding sleeve 2001 and the support guide rod 2002 are hinged. The support guide rod 2002 is connected to the stop block 22 and the protective shell 130. A limiting sleeve 25 is provided on the outside of the sliding sleeve 2001. A limiting groove 250 is formed on the limiting sleeve 25 to allow the support guide rod 2002 to deflect at an angle.

[0059] In use, after driving the two sliding sleeves 2001, the limiting sleeve 25, the supporting guide rod 2002, and the protective shell 130 away from each other, the elastic end 21 is stretched by force. Then, the supporting guide rod 2002 is driven to deflect along the limiting groove 250, causing the supporting guide rod 2002 to drive the protective shell 130 to deflect away from the photosensitive element 10 until it is restricted by the limiting groove 250 and no longer rotates. At this time, the force that drives the protective shell 130 away is released, and the elastic end 21, after being compressed, needs to return to its normal elastic extension state. The two protective shells 130, the support guide rod 2002, the limiting sleeve 25, and the sliding sleeve rod 2001 are driven to slide towards each other until the two protective shells 130 are back together. A certain deflection angle is formed between the deflected support guide rod 2002 and the protective shell 130 and the body 1. The deflected support guide rod 2002 and the protective shell 130 provide support for the sliding sleeve rod 2001, the limiting sleeve 25, and the body 1 as a whole, so that the operator can limit the entire device to the lower side of the instrument light source.

[0060] Furthermore, referring to Figures 6 to 8 As shown, to increase the stability of the support guide rod 2002 when supporting the entire device after deflection, both the sliding sleeve rod 2001 and the support guide rod 2002 are bent, with the bent section of the support guide rod 2002 located near the protective shell 130. The bent structure of the support guide rod 2002 increases the contact area between the deflected support guide rod 2002 and the worktable (i.e., the lower side of the instrument light source), thereby improving the stability of the support and limiting function provided by the support guide rod 2002.

[0061] Furthermore, referring to Figure 3 As shown, the bend of the support guide rod 2002 is spaced apart from the body 1. When the two protective shells 130 are initially restrained at the photosensitive element 10 (i.e., when the photosensitive element 10 is not released from restraint), the gap between the bend of the support guide rod 2002 and the body 1 allows the operator to pick up or place the entire device, increasing the convenience of use.

[0062] Example 2: Refer to Figure 5 and Figure 6 As shown, based on Embodiment 1, in order to improve the applicability of the measurement data after measuring the illuminance of the instrument light source, an adjusting gear 26 is connected to the sliding sleeve 2001 and is slidably sleeved on the outside of the extension guide rod 201. A driven gear 260 meshes on the adjusting gear 26. A through rod connected to the driven slider 24 is coaxially passed through the middle of the driven gear 260. At this time, the extension rotating rod is rotatably connected to the driven slider 24.

[0063] In use, after the connecting guide rod 200 is positioned below the instrument light source, the machine body 1 is driven to rotate the photosensitive element 10, digital display screen 11, amplification element 12, driven slider 24, driven gear 260, and through rod around the extension rod as the axis. The rotation of the driven gear 260 will mesh with the adjusting gear 26 and rotate circumferentially around the axis of the extension rod and the adjusting gear 26. This allows the rotation angle of the driven gear 260 to be limited by the adjusting gear 26, which in turn limits the deflection amplitude of the photosensitive element 10 relative to the instrument light source. This enables the photosensitive element 10 to measure the illuminance of the instrument light source at different angular positions, simulating the different angles of the patient's eyes relative to the instrument light source in different postures, thereby improving the applicability and accuracy of the measurement data.

[0064] Furthermore, refer to Figures 8 to 10 As shown, in order to further improve the convenience of using the device, the limiting sleeve 25 allows a certain range of rotation along the connected sliding sleeve 2001. A hinge seat 27 is connected inside the limiting sleeve 25. The hinge seat 27 is connected to the support guide rod 2002 through the ball shaft 270. The limiting through groove 250 is correspondingly adapted to the ball shaft 270 so that the ball shaft 270 passes through it, thereby limiting the deflection angle and range of the ball shaft 270 and the support guide rod 2002. At the same time, the hinge seat 27 allows the ball shaft 270 to have a certain range of axial sliding adjustment along the vertical section of the sliding sleeve 2001.

[0065] In use, firstly, the sliding sleeves 2001, limiting sleeves 25, hinge seats 27, ball shafts 270, support guides 2002, stop blocks 22, and protective shells 130 on both sides of the machine body 1 are slid away from each other. Then, the ball shafts 270, support guides 2002, stop blocks 22, and protective shells 130 are driven to slide away from the machine body 1 along the axis of the sliding sleeves 2001, so that the part of the ball shafts 270 slides further out of the hinge seats 27 and the stop blocks 22 disengage from the limiting grooves 23. Then, the ball shaft 270, the support guide rod 2002, the stop block 22 and the protective shell 130 are driven to rotate along the axis of the connected sliding sleeve rod 2001. Then, the ball shaft 270, the support guide rod 2002, the stop block 22 and the protective shell 130 are driven to rotate along the hinge seat 27 so that the rod part of the ball shaft 270 slides into the limiting through groove 250. At this time, an approximately triangular structure is formed between the machine body 1, the support guide rod 2002 and the sliding sleeve rod 2001 to form a support effect on the whole machine body 1.

[0066] Based on the above, when the operator needs to adjust the angle of the machine body 1, they only need to drive the end of the machine body 1 close to the support guide rod 2002 and the protective shell 130 to slide along the inclined support guide rod 2002. As one end of the machine body 1 slides along the outside of the support guide rod 2002, the other end of the machine body 1 will deflect around the extension rod as the axis and along the inclined support guide rod 2002, thereby achieving the effect of adjusting the angle of the entire machine body 1, so as to improve the applicability and accuracy of the measurement data.

[0067] During operation: First, when it is necessary to use a measuring instrument to measure the illuminance of the instrument light source, the protective cover 13 is driven by the limiting member 2 to disengage from the photosensitive element 10 on the body 1 so that the photosensitive element 10 is exposed. Then, the control switch 15 is turned on, and the body 1 and the photosensitive element 10 after being delimited are moved to the lower side of the instrument light source.

[0068] Step 2: After the instrument light source shines on the photosensitive element 10, the photosensitive element 10 converts the light energy from the light source into electrical energy and inputs it to the processor 16 for analysis and processing. Through the analysis and processing of the processor 16, the measured illuminance data is displayed on the digital display screen 11. At the same time, the data results are broadcast through the amplification element 12, and the measurement data is uploaded to the external data terminal through the signal element 17.

[0069] Step 3: After completing the illuminance measurement and confirmation, turn off the control switch 15 to stop the device from working, and then drive the protective cover 13 to reset through the limit member 2, so that the protective cover 13 is back against the photosensitive element 10, restoring the initial covering state to avoid accidental damage to the photosensitive element 10.

[0070] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive.

[0071] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A light intensity measuring instrument, comprising a body (1), characterized in that: The body (1) is connected to a photosensitive element (10), a digital display screen (11), a sound amplification element (12), and a protective cover (13). A limiting member (2) is also connected to the body (1) corresponding to the protective cover (13). The limiting member (2) includes: The connecting frame (20) is connected to the protective cover (13) and is located on the body (1); The elastic end (21) is located between the connecting frame (20) and the body (1) to provide the connecting frame (20) with a preload force that holds the protective cover (13) at the photosensitive element (10); The stop block (22) is connected to the connecting frame (20) for limiting, and a limit groove (23) is formed on the body (1) corresponding to the stop block (22). The connecting frame (20) includes two connecting guide rods (200) corresponding to the two protective shells (130), a stop block (22) is connected to the connecting guide rods (200), and the two ends of the elastic end (21) are respectively connected to the two connecting guide rods (200) and attached to the body (1). The end of the connecting guide rod (200) away from the protective shell (130) is provided with an extension guide rod (201) that is limited on the body (1). The extension guide rod (201) is connected to a driven slider (24) located on the body (1), and a guide groove (240) is formed on the body (1) corresponding to the driven slider (24). The connecting guide rod (200) includes a sliding sleeve (2001) that is limited and sleeved on the outside of the extension guide rod (201). The end of the sliding sleeve (2001) away from the extension guide rod (201) is connected to the protective shell (130) through the support guide rod (2002). The sliding sleeve (2001) is connected to the elastic end (21). The sliding sleeve (2001) is hinged to the support guide rod (2002). The support guide rod (2002) is connected to the stop block (22) and the protective shell (130). A limiting sleeve (25) is provided on the outside of the sliding sleeve (2001). A limiting groove (250) is formed on the limiting sleeve (25) to allow the support guide rod (2002) to deflect at an angle. The two ends of the elastic end (21) are respectively matched with the sliding sleeves (2001) on both sides, so that the two sliding sleeves (2001) have a pre-tightening tendency to move closer together and resist each other as the elastic end (21) contracts; An adjusting gear (26) is connected to the sliding sleeve (2001) and is slidably sleeved on the outside of the extension guide rod (201). A driven gear (260) meshes with the adjusting gear (26). A through rod connected to the driven slider (24) is coaxially passed through the middle of the driven gear (260). At this time, the extension rotating rod is rotatably connected to the driven slider (24). The limiting sleeve (25) allows a certain range of rotation along the connected sliding sleeve (2001). A hinge seat (27) is connected in the limiting sleeve (25). The hinge seat (27) is connected to the support guide rod (2002) through the ball shaft rod (270). The limiting through groove (250) is adapted to the ball shaft rod (270) so that the ball shaft rod (270) can be inserted therein to limit the deflection angle and range of the ball shaft rod (270) and the support guide rod (2002). At the same time, the hinge seat (27) allows the ball shaft rod (270) to have a certain range of axial sliding adjustment along the vertical section of the sliding sleeve rod (2001).

2. The illuminance measuring instrument according to claim 1, characterized in that: The body (1) has a hollow cavity inside, and a battery element (14) is provided in the cavity and is electrically connected to the photosensitive element (10), the sound amplification element (12) and the digital display screen (11). The body (1) is also limited by a control switch (15) that is electrically connected to the battery element (14). A processor (16) is provided in the cavity and is electrically connected to the battery element (14) to control the photosensitive element (10) and the digital display screen (11).

3. The illuminance measuring instrument according to claim 2, characterized in that: The cavity is also equipped with a signal element (17) which is electrically connected to the battery element (14) and the processor (16).

4. The illuminance measuring instrument according to claim 1, characterized in that: The protective cover (13) includes at least two protective shells (130) symmetrically abutting against the upper side of the photosensitive element (10), with the two protective shells (130) abutting against each other to form a cover for the photosensitive element (10).

5. A light intensity measuring instrument according to claim 1, characterized in that: The limiting groove (23) is bent to limit and guide the sliding path of the stop block (22).

6. The illuminance measuring instrument according to claim 1, characterized in that: Both the sliding sleeve rod (2001) and the support guide rod (2002) are bent.

7. The illuminance measuring instrument according to claim 1, characterized in that: The bent section of the support guide rod (2002) is spaced apart from the body (1).

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