Illuminance measuring instrument

Abstract

The invention relates to the field of measuring instruments, in particular to an illuminance measuring instrument which comprises a machine body, the machine body is connected with a photosensitive element, a digital display screen, a sound amplifying element and a protective cover, and the machine body is further connected with a limiting piece corresponding to the protective cover. The protective cover is driven by the limiting piece to correspondingly abut against the photosensitive element, effective covering is formed, the photosensitive element is prevented from being accidentally damaged in the daily use or transportation process, the photosensitive element is allowed to move by a certain amplitude through cooperation between the guide sliding groove and the driven sliding block which are formed in the machine body, and the service life of the photosensitive element is prolonged. The same light source can be measured at different positions, and the problem that measurement data is difficult to observe accurately due to the fact that a worker needs to follow an instrument to change the position of the worker is solved.

Description

Technical Field

[0001] The present invention relates to the field of measuring instruments, in particular to an illuminance measuring instrument. Background Art

[0002] In the field of ophthalmology, measuring instrument illuminance is a crucial and challenging task. To accurately assess the impact of light intensity on ocular tissue, researchers and clinicians need to precisely determine the intensity of light from the instrument's light source entering the eye. Light of varying intensities can have varying effects on the eye. For example, excessive light exposure can damage tissues such as the retina. Accurate measurement provides a key basis for research and clinical diagnosis and treatment, ensuring the safety and scientific nature of related operations. While current illuminance measurement technology has advanced, it still suffers from shortcomings in certain key areas, such as insufficient measurement accuracy, complex operation, and poor portability.

[0003] With the development of science and technology, technicians in related fields have also made a lot of optimizations on the technical means for measuring illuminance. In order to make a more accurate comparison, for example, Chinese patent publication number CN211783855U discloses a digital illuminometer, including an illuminometer body, a collector, a connecting line, a connecting piece and an elastic band. When in use, the user's wrist passes through the space, thereby wearing the illuminometer body on the wrist, and holding the collector in the same hand. After the data is measured, the other hand can record the data, thereby improving the convenience of using the illuminometer.

[0004] However, the above measuring device still has some shortcomings in actual use: The above-mentioned device works by tying the illuminance meter body to one of the user's wrists, and the hand holds the collector to measure the illuminance, while the other hand is used to record data. However, during use, the worker always needs to use one hand to grab the collector. When collecting illuminance data of the collector at different positions relative to the light source, the worker needs to constantly change the position of the hand holding the collector, which will cause the worker to change his own position according to the position change of the collector. If the worker does not change his own position in time, it will be difficult to accurately observe the measured illuminance data due to angle problems. At the same time, the above-mentioned device does not protect the illuminance meter when using it for illuminance detection, which can easily damage the outer surface of the detector and affect the measurement accuracy.

[0005] Therefore, based on the above-stated viewpoint, there is still room for improvement in the existing technical means for illuminance measurement. Summary of the Invention

[0006] In order to solve the above problems, the present invention provides a light intensity measuring instrument, including a body, a photosensitive element, a digital display screen, a sound amplifying element and a protective cover connected to the body, and a limiting member connected to the body corresponding to the protective cover, the limiting member including: The connecting frame is correspondingly connected to the protective cover and is limited on the machine body.

[0007] The elastic end is limited between the connecting frame and the body to provide the connecting frame with a pre-tightening force to limit the protective cover at the photosensitive element.

[0008] The stop block is connected to the connection frame limiter, and a limit sliding groove is formed on the machine body corresponding to the stop block.

[0009] Preferably, a hollow accommodating cavity is formed inside the body, and a battery element is provided in the accommodating cavity and is electrically connected to the photosensitive element, the sound amplifying element and the digital display screen. A control switch is also limited on the body and is electrically connected to the battery element. A processor is provided in the accommodating cavity and is electrically connected to the battery element to control the photosensitive element and the digital display screen.

[0010] Preferably, a signal element is further provided in the accommodating cavity and is electrically connected to the battery element and the processor respectively.

[0011] Preferably, the protective cover comprises at least two protective shells symmetrically abutting against the upper side of the photosensitive element, and the two protective shells abut against each other to form a cover for the photosensitive element.

[0012] Preferably, the connecting frame includes two connecting guide rods arranged corresponding to the two protective shells, the stop block is connected to the connecting guide rods, the two ends of the elastic end are respectively connected to the two connecting guide rods and fit on the machine body, and the end of the connecting guide rod away from the protective shell is passed through an extension guide rod limited on the machine body.

[0013] Preferably, the extending guide rod is connected to a driven sliding block which is limitedly located on the machine body, and a guide groove is formed on the machine body corresponding to the driven sliding block.

[0014] Preferably, the limiting sliding groove is arranged in a bent shape to limit and guide the sliding path of the stop block.

[0015] Preferably, the connecting guide rod includes a sliding sleeve rod that is limitedly sleeved on the outside of the extension guide rod, the end of the sliding sleeve rod away from the extension guide rod is connected to the protective shell through the support guide rod, the sliding sleeve rod is connected to the elastic end, the sliding sleeve rod is hinged to the support guide rod, and the support guide rod is connected to the stop block and the protective shell.

[0016] Preferably, the sliding sleeve rod and the supporting guide rod are both arranged in a bent shape.

[0017] Preferably, the bent section of the support guide rod is spaced apart from the machine body.

[0018] In summary, this application includes at least one of the following beneficial technical effects: First, the present invention uses a limit member to drive the protective cover to contact the photosensitive element, forming an effective cover, thereby preventing the photosensitive element from being accidentally damaged during daily use or transportation. In addition, the cooperation between the guide slide and the driven slider provided on the body allows the photosensitive element to be shifted to a certain extent, thereby achieving measurement of the same light source at different positions, avoiding the problem of workers having to change their own position to follow the instrument, making it difficult to accurately observe the measurement data.

[0019] 2. The present invention cooperates with the digital display screen, signal elements, sound amplification elements and photosensitive elements provided on the machine body to assist staff in observing the measured data while broadcasting the measured result data so that the staff can re-confirm the accuracy of the measured data and upload the data to an external terminal device for unified collection, analysis and processing of the data.

[0020] 3. The present invention cooperates with the limiting parts and the body so that the body can measure and confirm the illumination at different positions relative to the same instrument light source. At the same time, in the process of adjusting the position of the body, the body is limited to improve the stability of the body when changing its own position and posture, thereby improving the accuracy of the measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below with reference to the accompanying drawings and examples.

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a structural diagram of the processor of the present invention.

[0024] Figure 3 It is a structural schematic diagram of the protective cover of the present invention.

[0025] Figure 4 This invention Figure 3 A magnified view of the middle panel.

[0026] Figure 5 It is a structural schematic diagram of the driven slider of the present invention.

[0027] Figure 6 It is a structural schematic diagram of the adjusting gear of the present invention.

[0028] Figure 7 It is a diagram of an embodiment of the present invention.

[0029] Figure 8 It is a structural schematic diagram of the connecting guide rod of the present invention.

[0030] Figure 9 This invention Figure 8 Magnified view of B.

[0031] Figure 10 It is another embodiment of the present invention.

[0032] Figure 11 It is an electrical circuit diagram between the internal components of the present invention.

[0033] In the figure, 1. body; 10. photosensitive element; 11. digital display screen; 12. sound amplifying element; 13. protective cover; 130. protective shell; 14. battery element; 15. control switch; 16. processor; 17. signal element; 2. limiter; 20. connecting frame; 200. connecting guide rod; 2001. sliding sleeve; 2002. supporting guide rod; 201. extending guide rod; 21. elastic end; 22. stop block; 23. limiting slide; 24. driven slider; 240. guide slide; 25. limiting sleeve; 250. limiting through groove; 26. adjusting gear; 260. driven gear; 27. articulated seat; 270. ball shaft rod. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1 To the attached Figure 11 The embodiments of the present invention are described in detail.

[0035] The embodiment of the present application discloses a light intensity measuring instrument, which is mainly used in the process of measuring and confirming the light intensity of other instruments using a light intensity measuring instrument. In terms of technical effect, the effect of measuring and confirming the light intensity of the light source is achieved through the measurement of the photosensitive element; in particular, during the measurement process, through the cooperation between the photosensitive element, the digital display screen, the sound amplifying element, the battery element, the processor and the signal element, the measured light intensity data is displayed on the digital display screen so that the staff can view the records, and the measured result data is also broadcasted to avoid recording errors of the staff, and the secondary confirmation ensures the accuracy of the measurement data. Then, the measured data is uploaded to the terminal device through the signal element, which is beneficial to the user's analysis and summary; further, the present application also realizes the protection of the photosensitive element through the cooperation between the limiter and the protective cover to avoid accidental damage to the photosensitive element affecting the measurement data.

[0036] Example 1: Reference Figure 1 and Figure 2As shown, a light intensity measuring instrument includes a body 1, to which a photosensitive element 10, a digital display screen 11, a sound amplifier 12 and a protective cover 13 are connected. A limiter 2 is also connected to the body 1 corresponding to the protective cover 13. In the initial state, the limiter 2 drives the protective cover 13 to contact the photosensitive element 10, so as to form a covering and protection effect for the photosensitive element 10 in the normal state, thereby avoiding accidental damage to the photosensitive element 10 and causing abnormal measurement data. It should be noted that the photosensitive element 10 is a conventional device for light intensity measurement and confirmation, which is generally composed of a photosensitive battery, and the sound amplifier 12 is a conventional existing device such as a loudspeaker for broadcasting data, which will not be described in detail here.

[0037] When it is necessary to measure the illuminance of the instrument light source, move the entire device to the instrument light source, drive the protective cover 13 through the limiter 2 to remove the shielding of the photosensitive element 10, and make the photosensitive element 10 face the instrument light source, and then drive the instrument light source 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, and at the same time outputs a signal to the sound amplification element 12, and broadcasts the numbers displayed on the digital display screen 11 so that the staff can collect data.

[0038] Further, refer to Figure 2 As shown, in order to process the electrical energy converted by the photosensitive element 10 and output signals to the digital display screen 11 and the sound amplifying element 12, a hollow accommodating cavity is formed inside the body 1, and a battery element 14 is provided in the accommodating cavity, which is electrically connected to the photosensitive element 10, the sound amplifying element 12 and the digital display screen 11 respectively. A control switch 15 electrically connected to the battery element 14 is also limited on the body 1, and a processor 16 is provided in the accommodating cavity, which is electrically connected to the battery element 14, the photosensitive element 10 and the digital display screen 11 respectively, so as to control the photosensitive element 10 and the digital display screen 11.

[0039] When in use, after driving the protective cover 13 to separate from the photosensitive element 10, turn on the control switch 15 to start the device. After the instrument light source is irradiated on the photosensitive element 10, the photosensitive element 10 converts the light energy into electrical energy and outputs it to the processor 16 for further processing and calculation, so that the converted electrical energy can be output as a digital signal. The processed data will be converted into illuminance value and displayed on the digital display screen 11 of the instrument. At the same time, it will be broadcast through the loudspeaker 12 so that the staff can record the measured illuminance data.

[0040] Furthermore, as an optional embodiment, referring to Figure 2As shown, a signaling element 17 is also provided within the housing chamber, electrically connected to the battery element 14 and the processor 16. Signaling element 17 is preferably a Bluetooth module, and is connected to an external terminal device for data transmission and recording. During use, after the instrument's light source illuminance measurement is completed, the measured illuminance value is displayed on the digital display 11 and the terminal device, while the loudspeaker 12 announces the result. The measured value is then transmitted to the mini-program via signaling element 17 for unified data recording.

[0041] Of course, as an optional implementation, when the device is used in a medical setting, the sound amplification element 12 can also be removed accordingly to reduce interference and improve product flexibility.

[0042] 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 daily conditions. The two protective shells 130 abut against each other to form a cover for the photosensitive element 10. One end of the protective shell 130 close to 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 in daily life, the two protective shells 130 are driven to abut against each other to cover the photosensitive element 10 through the connecting frame 20 and the elastic end 21. When measurement is required, the two protective shells 130 are driven to separate from the photosensitive element 10 through the connecting frame 20 to promptly release the cover of the photosensitive element 10, thereby completing the measurement effect of the instrument light source illumination.

[0043] Further, refer 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, and the two ends of the elastic end 21 are respectively connected to the two connecting guide rods 200 and fit on the body 1. The end of the connecting guide rod 200 away from the protective shell 130 is penetrated by an extension guide rod 201 limited on the body 1. As an optional embodiment, the elastic end 21 is preferably an elastic band or a spring. At the same time, a limit block is jointly provided between the extension guide rod 201 and the connecting guide rod 200. The limit block is slidably connected to the connecting guide rod 200 to limit the relative sliding amplitude between the connecting guide rod 200 and the extension guide rod 201 to prevent the connecting guide rod 200 from accidentally detaching from the extension protrusion.

[0044] When it is necessary to remove the cover of the photosensitive element 10, the two connecting guide rods 200 are driven to slide away from each other, and the connecting guide rods 200 slide axially along the extension guide rod 201, and drive the elastic end 21 to be 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 separated from the photosensitive element 10, so that the light source at the instrument can illuminate the photosensitive element 10.

[0045] Furthermore, refer to Figures 3 to 5 As shown, to improve the accuracy of measurement data, an extended guide rod 201 is connected to a driven slider 24 limited to the body 1. A guide slot 240 is formed on the body 1 corresponding to the driven slider 24. During use, after removing the cover on the photosensitive element 10, the body 1 is driven to cause the photosensitive element 10 to slide, so that the guide slot 240 and the driven slider 24 form a relative sliding effect. This allows the photosensitive element 10 to measure the illuminance of the same light source at different positions, improving the applicability of the measurement data and further enhancing the accuracy of the instrument's light source illuminance measurement data.

[0046] As a feasible embodiment, when the elastic end 21 is an elastic band, when in use, after driving the two connecting guide rods 200 to drive the connected protective shell 130 to separate from the photosensitive element 10, the elastic end 21 is further stretched toward the side away from the body 1, so that a certain distance is separated from the body 1. Then, the staff member passes the arm through the gap. At this time, the stretched elastic end 21 tends to recover its normal elastic extension, abutting against the staff member's arm, and confining the entire body 1 on the staff member's arm.

[0047] Then, the body 1 is driven to cause the photosensitive element 10 to slide, so that the guide groove 240 and the driven slider 24 form a relative position slide, 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 simulates the state of patients of different heights using the instrument for detection, further improving the accuracy and applicability of data measurement.

[0048] Reference Figures 2 to 5 As shown, the limiting member 2 includes: The connecting frame 20 is correspondingly connected to the protective cover 13 and is positioned on the body 1 .

[0049] The elastic end 21 is located between the connecting frame 20 and the body 1 to provide the connecting frame 20 with a pre-tightening force to limit the protective cover 13 to the photosensitive element 10 .

[0050] The stop block 22 is connected to the connection frame 20 for limiting position, and a limiting sliding groove 23 is formed on the body 1 corresponding to the stop block 22 .

[0051] During use, through the mutual cooperation between the elastic end 21 and the connecting frame 20, when the photosensitive element 10 is not needed in daily life, the protective shell 130 can be driven in time to protect the photosensitive element 10. When the photosensitive element 10 is needed for measurement, the restriction on the photosensitive element 10 can be quickly lifted, so that the staff can use the device to measure and confirm the illuminance. At the same time, the overall volume of the device can be reduced for the staff to carry and store.

[0052] Reference Figure 3 and Figure 4 As shown, the limiting groove 23 is arranged in a bent shape, and the horizontal section of the limiting groove 23 is in a relatively vertical position relationship with the connecting guide rod 200, so as to limit the stop block 22, the connecting guide rod 200, the extension guide rod 201 and the driven slider 24 from sliding along the guide groove 240 in the initial state, so that the two protective shells 130 are limited at the photosensitive element 10 to form a covering effect on the photosensitive element 10, and the other vertical section of the same limiting groove 23 is relatively parallel to the connecting guide rod 200 and passes through the body 1.

[0053] During use, the two connecting guide rods 200, the protective shell 130 and the stop block 22 are driven to slide away from each other, and the stop block 22 is driven to slide along the horizontal section of the limiting groove 23 first. After the stop block 22 slides to the end of the horizontal section of the same limiting groove 23, that is, after the two protective shells 130 are separated from the photosensitive element 10, the connecting guide rod 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 groove 240, and at the same time, the stop block slides along the vertical section of the limiting groove 23, so that the two protective shells 130 are further separated from the photosensitive element 10.

[0054] Reference Figures 6 to 9 As shown, the connecting guide rod 200 includes a sliding sleeve rod 2001 which is limitedly sleeved on the outside of the extension guide rod 201. The sliding sleeve rod 2001 should be pre-treated with coating and lubrication to improve its service life. The end of the sliding sleeve rod 2001 away from the extension guide rod 201 is connected to the protective shell 130 through the support guide rod 2002. The sliding sleeve rod 2001 is connected to the elastic end 21. The sliding sleeve rod 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 outer limit sleeve of the sliding sleeve rod 2001. A limiting groove 250 is formed on the limiting sleeve 25 for the support guide rod 2002 to deflect at an angle.

[0055] During use, after the two sliding sleeves 2001, the limiting sleeve 25, the supporting guide rod 2002 and the protective shell 130 are driven away from each other, the elastic end 21 is stretched by the force, and then the supporting guide rod 2002 is driven to deflect along the limiting groove 250, so that the supporting guide rod 2002 drives the protective shell 130 to deflect to the side away from the photosensitive element 10 until it is restricted by the limiting groove 250 and no longer rotates. At this time, the force driving the protective shell 130 away is released, and the elastic end 21 needs to return to its normal elastic extension state after being compressed. The two protective shells 130, the support guide rod 2002, the limiting sleeve 25 and the sliding sleeve rod 2001 are driven to slide toward each other until the two protective shells 130 are again abutted against each other, and a certain deflection angle is formed between the deflected support guide rod 2002 and the protective shell 130 and the body 1, and the deflected support guide rod 2002 and the protective shell 130 form a supporting effect on the sliding sleeve rod 2001, the limiting sleeve 25 and the body 1 as a whole, so that the staff can limit the entire device to the lower side of the instrument light source.

[0056] Further, refer to Figures 6 to 8 As shown, to increase the stability of the deflected support guide rod 2002 when supporting the entire device, the sliding sleeve rod 2001 and the support guide rod 2002 are both bent, and the bent section of the support guide rod 2002 is 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 workbench (i.e., the underside of the instrument light source), thereby improving the stability of the support and limiting function provided by the support guide rod 2002.

[0057] Furthermore, refer to Figure 3 As shown, the bent section of the support guide rod 2002 is spaced apart from the body 1. When the two protective shells 130 are initially restrained against the photosensitive element 10 (i.e., the photosensitive element 10 is not released from the restraint), the space between the bent section of the support guide rod 2002 and the body 1 facilitates the operator's ability to pick up or place the entire device, thereby increasing convenience during use.

[0058] Example 2: Reference Figure 5 and Figure 6 As shown, on the basis of Example 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 slidingly sleeved on the outside of the extension guide rod 201. A driven gear 260 is engaged with the adjusting gear 26. A through rod connected to the driven slider 24 is coaxially penetrated in the middle of the driven gear 260. At this time, the extending rotating rod is rotationally connected to the driven slider 24.

[0059] During use, after the connecting guide rod 200 is limited to the lower side of the instrument light source, the body 1 is driven to drive the photosensitive element 10, the digital display screen 11, the sound amplifying element 12, the driven slider 24, the driven gear 260 and the through rod to deflect the angle with the extended rotating rod as the axis. The rotation of the driven gear 260 will engage with the adjusting gear 26 and rotate circumferentially with the axis of the extended rotating rod and the adjusting gear 26 as the axis, thereby limiting the rotation angle of the driven gear 260 by adjusting the gear 26, that is, limiting the deflection amplitude of the photosensitive element 10 relative to the instrument light source, so that the photosensitive element 10 measures the illuminance of the instrument light source at different angles, thereby 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.

[0060] Further, 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, and a hinge seat 27 is connected to the limiting sleeve 25. The hinge seat 27 is connected to the support guide rod 2002 through the ball shaft rod 270. The limiting groove 250 is correspondingly adapted to the ball shaft rod 270 so that the ball shaft rod 270 is inserted therein to limit the deflection angle and amplitude 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.

[0061] When in use, the sliding sleeve 2001, the limiting sleeve 25, the hinge seat 27, the ball shaft 270, the support guide rod 2002, the stop block 22 and the protective shell 130 on both sides of the body 1 are first caused to slide away from each other, and then the ball shaft 270, the support guide rod 2002, the stop block 22 and the protective shell 130 are driven to slide along the axis of the sliding sleeve 2001 in the direction away from the body 1, so that the rod portion of the ball shaft 270 further slides out of the hinge seat 27, and the stop block 22 is disengaged from the limiting groove 23. , then drive the ball shaft rod 270, the support guide rod 2002, the stop block 22 and the protective shell 130 to rotate along the axis of the connected sliding sleeve rod 2001, and then drive the ball shaft rod 270, the support guide rod 2002, the stop block 22 and the protective shell 130 to rotate along the hinge seat 27, so that the rod portion of the ball shaft rod 270 slides into the limiting groove 250. At this time, a nearly triangular structure is formed between the body 1, the support guide rod 2002 and the sliding sleeve rod 2001, so as to form a supporting effect on the entire body 1.

[0062] Based on the above, when the staff needs to adjust the angle of the body 1, they only need to drive the body 1 close to the support guide rod 2002 and one end of the protective shell 130 to slide along the inclined support guide rod 2002. As one end of the body 1 slides along the outside of the support guide rod 2002, the other end of the body 1 is deflected along the inclined support guide rod 2002 with the extended rotating rod as the axis, thereby achieving the effect of adjusting the angle of the body 1 as a whole, so as to improve the applicability and accuracy of the measurement data.

[0063] During operation: The first step is to use a measuring instrument to measure the illuminance of the instrument light source. The protective cover 13 is driven out of the conflicting state with the photosensitive element 10 on the body 1 through the limiter 2 to allow the photosensitive element 10 to leak out. Then the control switch 15 is turned on, and the body 1 and the photosensitive element 10 after the limit is released are moved to the lower side of the instrument light source.

[0064] Step 2: After the instrument light source shines on the photosensitive element 10, the photosensitive element 10 converts the light energy of the light source into electrical energy and inputs it into 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, and the data results are broadcasted through the loudspeaker element 12, and the measured data is uploaded to the external data terminal through the signal element 17.

[0065] Step 3: After completing the illuminance measurement and confirmation, turn off the control switch 15 to stop the device, and then drive the protective cover 13 to reset through the limiter 2, so that the protective cover 13 is again held against the photosensitive element 10, restoring the initial covering state to avoid accidental damage to the photosensitive element 10.

[0066] 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 present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive.

[0067] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods 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 amplifying element (12) and a protective cover (13). The body (1) is also connected to a limiting member (2) corresponding to the protective cover (13). The limiting member (2) includes: A connecting frame (20) is connected to the protective cover (13) and is positioned on the body (1); The elastic end (21) is limited between the connecting frame (20) and the body (1) to provide the connecting frame (20) with a pre-tightening force to limit the protective cover (13) at the photosensitive element (10); The stop block (22) is connected to the connection frame (20) in a limiting manner, and a limiting sliding groove (23) is formed on the machine body (1) corresponding to the stop block (22).

2. The illuminance measuring instrument according to claim 1, wherein: The body (1) is hollow inside and has a receiving cavity formed therein. A battery element (14) is provided in the receiving cavity and is electrically connected to the photosensitive element (10), the sound amplifying element (12) and the digital display screen (11). A control switch (15) is also positioned on the body (1) and is electrically connected to the battery element (14). A processor (16) is provided in the receiving 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: A signal element (17) is also provided in the accommodating cavity and is electrically connected to the battery element (14) and the processor (16) respectively.

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

5. The illuminance measuring instrument according to claim 1, characterized in that: 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 are fitted on the body (1), and the end of the connecting guide rod (200) away from the protective shell (130) is penetrated by an extension guide rod (201) limited on the body (1).

6. The illuminance measuring instrument according to claim 5, characterized in that: The extending guide rod (201) is connected to a driven slider (24) which is limitedly located on the machine body (1), and a guide slot (240) is formed on the machine body (1) corresponding to the driven slider (24).

7. The illuminance measuring instrument according to claim 1, characterized in that: The limiting sliding groove (23) is arranged in a bent shape to limit and guide the sliding path of the stop block (22).

8. The illuminance measuring instrument according to claim 5, characterized in that: The connecting guide rod (200) comprises a sliding sleeve rod (2001) which is limitedly sleeved on the outside of the extension guide rod (201); one end of the sliding sleeve rod (2001) away from the extension guide rod (201) is connected to the protective shell (130) via the support guide rod (2002); the sliding sleeve rod (2001) is connected to the elastic end (21); the sliding sleeve rod (2001) and the support guide rod (2002) are hingedly arranged; and the support guide rod (2002) is connected to the stop block (22) and the protective shell (130).

9. The illuminance measuring instrument according to claim 8, characterized in that: The sliding sleeve rod (2001) and the supporting guide rod (2002) are both arranged in a bent shape.

10. The illuminance measuring instrument according to claim 8, characterized in that: The bent section of the support guide rod (2002) is spaced apart from the machine body (1).

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