Rotary type light total reflection demonstration experiment instrument

Abstract

The utility model is suitable for the technical field of teaching experiment instruments, and provides a rotary light total reflection demonstration experiment instrument, which comprises a base, a connecting plate and a supporting rod, the connecting block is arranged on the connecting plate in a sliding manner; the scale disc is rotationally mounted on the connecting block; the semicircular glass brick and the first laser pen are arranged on the dial disc; the second laser pen is arranged on the supporting rod; the fixing mechanism is arranged on the dial disc and is used for fixing a semicircular glass brick; and the two mounting mechanisms are respectively arranged on the dial disc and the supporting rod and are used for mounting a first laser pen and a second laser pen. The rotary light total reflection demonstration experiment instrument provided by the scheme not only can demonstrate a total reflection phenomenon and verify the reversibility of a light path of total reflection, but also can be used for measuring the refractive index of a semicircular glass brick to obtain experiment data.

Description

Technical Field

[0001] The utility model belongs to the technical field of teaching experimental instruments, in particular to a rotating light total reflection demonstration experimental instrument. Background Art

[0002] Total reflection is an important part of high school physical optics teaching and is the basic learning content of high school physical optics. The teaching of total reflection is usually presented in the form of demonstration experiments. During the experiment, first hold a laser pen and shoot the laser beam at the semicircular glass brick at a certain angle, then adjust the angle of the laser beam so that the laser is directed along the scale disk to the center of the scale disk. At this time, use a handheld laser pen to continuously adjust the incident angle of the laser beam so that the laser always passes through the center of the circle, and observe the phenomenon of the laser beam on the interface. When the incident angle gradually increases, it can be observed that the refracted light gradually darkens until it disappears. When the refracted light is completely unobservable, total reflection occurs.

[0003] However, since the laser pen in the experiment is not fixed, direct operation will cause jitter, making the phenomenon difficult to observe, and the optical path cannot pass through the center of the circle well, making the phenomenon unintuitive. In addition, traditional experiments can only make qualitative analysis of the total reflection phenomenon, not quantitative analysis, nor can they verify the reversible experiment of the optical path of the total reflection phenomenon. Utility Model Content

[0004] In order to solve the technical problem that the existing demonstration experiment equipment cannot perform quantitative analysis on the teaching content, the utility model provides a rotating light total reflection demonstration experiment instrument.

[0005] The utility model is realized in this way: a rotary light total reflection demonstration experiment instrument comprises: a base and a connecting plate and a supporting rod installed on the base; a connecting block slidably arranged on the connecting plate; a scale disk rotatably arranged on the connecting block; a semicircular glass brick and a first laser pen arranged on the scale disk; a second laser pen arranged on the supporting rod; a fixing mechanism arranged on the scale disk for fixing the semicircular glass brick; and two mounting mechanisms, wherein the two mounting mechanisms are respectively arranged on the scale disk and the supporting rod for mounting the first laser pen and the second laser pen.

[0006] Preferably, the fixing mechanism includes: a connecting port provided on the scale disk; a connecting rod fixedly installed on one side of the semicircular glass brick, the connecting rod being in sliding contact with the connecting port; a mounting groove provided on the connecting rod; a connecting spring assembled in the mounting groove; a pressure block fixedly installed at one end of the connecting spring, the pressure block slidingly extending out of the mounting groove, and the pressure block being in sliding contact with one side of the scale disk.

[0007] Preferably, the mounting mechanism comprises: two pen holders respectively mounted on the support rod and the scale disc, the two pen holders being composed of two hinged mounting blocks, one side of the two mounting blocks being provided with an arc-shaped notch, the two pen holders being respectively connected with the first laser pen and the second laser pen; two L-shaped blocks respectively fixedly mounted on the two mounting blocks; a positioning rod slidably mounted on any one of the L-shaped blocks, the positioning rod being slidably connected with the other L-shaped block; a compression spring sleeved on the positioning rod, the two ends of the compression spring being respectively fixedly connected with the L-shaped block and the protruding end of the positioning rod.

[0008] Preferably, the arc-shaped notch is equipped with an anti-slip pad, and the positioning rod is arranged in an L shape.

[0009] Preferably, an electric telescopic rod is fixedly mounted on the top of the connecting block, a connecting frame is fixedly mounted on the output rod of the electric telescopic rod, an anti-sliding block is fixedly mounted on the connecting frame, and the anti-sliding block is located above the output rod of the scale disk.

[0010] Preferably, a T-shaped slot is provided on the top of the connecting plate, a T-shaped block is fixedly installed on the bottom of the connecting block, the T-shaped block is slidably connected to the T-shaped slot, a limiting rod is slidably installed on one side of the connecting plate, and the limiting rod is slidably connected to the T-shaped block.

[0011] Preferably, the limiting rod and the connecting plate are both equipped with Velcro, and the two Velcros are bonded to each other.

[0012] Compared with the related art, the rotating light total reflection demonstration experiment instrument provided by the utility model has the following beneficial effects:

[0013] Through the use of the graduated disk, the semicircular glass brick, the first laser pen and the second laser pen, not only can the total reflection phenomenon be demonstrated and the reversibility of the total reflection optical path be verified, but it can also be used to measure the refractive index of the semicircular glass brick and obtain experimental data. At the same time, the total reflection phenomenon of the transparent liquid can be explored, which can not only train students' ability to apply knowledge flexibly, but also stimulate their curiosity, thirst for knowledge, imagination, and love for the world of natural science. The connecting rod is limited by the pressure block to ensure the stability of the semicircular glass brick, and the fixing effect is better. At the same time, it is also convenient for the subsequent disassembly of the semicircular glass brick. The first laser pen and the second laser pen are installed through the installation mechanism, and the installation is relatively quick. Compared with the prior art, the rotary light total reflection demonstration experiment instrument provided by the present invention mainly comprises a base and a connecting plate and a supporting rod installed on the base; a connecting block slidably arranged on the connecting plate; a graduated disk rotatably arranged on the connecting block; a semicircular glass brick and a first laser pen arranged on the graduated disk; a second laser pen arranged on the supporting rod; a fixing mechanism arranged on the graduated disk for fixing the semicircular glass brick; two mounting mechanisms, the two mounting mechanisms are respectively arranged on the graduated disk and the supporting rod for mounting the first laser pen and the second laser pen, so that the rotary light total reflection demonstration experiment instrument can not only demonstrate the total reflection phenomenon and verify the reversibility of the total reflection optical path, but also can be used to measure the refractive index of the semicircular glass brick to obtain the advantages of experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of a rotating light total reflection demonstration experimental instrument provided by the utility model;

[0015] Figure 2 It is a side view cross-sectional structural schematic diagram of a rotating light total reflection demonstration experimental instrument provided by the utility model;

[0016] Figure 3 It is a side view structural schematic diagram of a rotating light total reflection demonstration experimental instrument provided by the utility model;

[0017] Figure 4 It is an assembly diagram of the pen holder and the L-shaped block provided by the utility model;

[0018] Figure 5 It is an assembly drawing of the connecting plate and the connecting block provided by the utility model;

[0019] Figure 6 for Figure 2 Schematic diagram of the enlarged structure of part A shown in FIG.

[0020] Figure numerals: 1. base; 2. connecting plate; 3. connecting block; 4. scale disk; 5. semicircular glass brick; 6. first laser pen; 7. support rod; 8. second laser pen; 9. connecting rod; 10. mounting groove; 11. connecting spring; 12. pressing block; 13. pen holder; 14. L-shaped block; 15. positioning rod; 16. compression spring; 17. anti-slip pad; 18. electric telescopic rod; 19. anti-sliding block; 20. T-shaped block; 21. limiting rod. DETAILED DESCRIPTION

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] The utility model embodiment provides a rotating light total reflection demonstration experimental instrument, such as Figure 1-6 As shown, the rotary light total reflection demonstration experiment instrument comprises: a base 1 and a connecting plate 2 and a support rod 7 installed on the base 1; a connecting block 3 slidably arranged on the connecting plate 2; a scale disk 4 rotatably installed on the connecting block 3; a semicircular glass brick 5 and a first laser pen 6 arranged on the scale disk 4; a second laser pen 8 arranged on the support rod 7; a fixing mechanism arranged on the scale disk 4 for fixing the semicircular glass brick 5; and two mounting mechanisms, which are respectively arranged on the scale disk 4 and the support rod 7 for mounting the first laser pen 6 and the second laser pen 8.

[0024] It should be noted that the existing total reflection teaching demonstration experimental equipment is mostly demonstrated by teachers holding a laser pen to illuminate a semicircular glass brick. However, holding the laser pen at a fixed angle for a long time is very likely to cause shaking, thereby affecting students' observation.

[0025] In this embodiment, firstly, the second laser pen 8 is turned on to make the light pass through the center of the semicircular glass brick 5, and then the scale disk 4 is slowly rotated. At this time, three light rays appear on the scale disk 4, namely, the incident light, the reflected light and the refracted light, and then the scale disk 4 is continued to be rotated to record the relevant data;

[0026] The rotating light total reflection demonstration experiment instrument can not only demonstrate the total reflection phenomenon and verify the reversibility of the total reflection light path, but also be used to measure the refractive index of the semicircular glass brick 5 and obtain experimental data. At the same time, the instrument can explore the total reflection phenomenon of transparent liquid, which can not only train students' ability to flexibly apply knowledge, but also stimulate their curiosity, thirst for knowledge, imagination, and love for the world of natural science.

[0027] After demonstrating the total reflection phenomenon of light in the semicircular glass brick 5, remove the semicircular glass brick 5 and then install a hemispherical water tank on it. When it is necessary to experiment with different liquids, inject an appropriate amount of different transparent liquids into the water tank, then rotate the first laser pen 6 on the periphery of the scale disk 4, observe the refraction and reflection phenomena of light, read the degrees of the refraction angle and the incident angle from the scale disk 4, continue to rotate the first laser pen 6 until total reflection occurs, record the relevant data, and measure the refractive index of the liquid according to the formula provided in the textbook for analysis.

[0028] In a further preferred embodiment of the utility model, the fixing mechanism includes: a connecting port provided on the scale disk 4; a connecting rod 9 fixedly installed on one side of the semicircular glass brick 5, and the connecting rod 9 is in sliding contact with the connecting port; a mounting groove 10 provided on the connecting rod 9; a connecting spring 11 assembled in the mounting groove 10; a pressure block 12 fixedly installed at one end of the connecting spring 11, and the pressure block 12 slides and extends out of the mounting groove 10, and the pressure block 12 is in sliding contact with one side of the scale disk 4.

[0029] In this embodiment, when the semicircular glass brick 5 needs to be disassembled, first slide the pressing block 12 so that the pressing block 12 slides along the installation groove 10, so that the connecting spring 11 contracts, and then the pressing block 12 slides away from one side of the scale disk 4, and then pull the semicircular glass brick 5 so that the semicircular glass brick 5 drives the connecting rod 9 to slide along the connecting port, and the disassembly of the semicircular glass brick 5 is completed. The disassembly is relatively quick, and the connecting rod 9 is arranged in a rectangular shape, so that the semicircular glass brick 5 can slide synchronously with the scale disk 4.

[0030] In a further preferred embodiment of the utility model, the mounting mechanism includes: two pen holders 13 respectively mounted on the support rod 7 and the scale disk 4, the two pen holders 13 are composed of two hinged mounting blocks, one side of the two mounting blocks is provided with an arc-shaped notch, and the two pen holders 13 are respectively connected to the first laser pen 6 and the second laser pen 8; two L-shaped blocks 14 respectively fixedly mounted on the two mounting blocks; a positioning rod 15 slidably mounted on any one of the L-shaped blocks 14, the positioning rod 15 is slidably connected to the other L-shaped block 14; a compression spring 16 sleeved on the positioning rod 15, the two ends of the compression spring 16 are respectively fixedly connected to the protruding ends of the L-shaped block 14 and the positioning rod 15.

[0031] In this embodiment, when the first laser pen 6 or the second laser pen 8 is out of power and needs to be replaced, first pull the positioning rod 15 so that the positioning rod 15 drives the compression spring 16 to slide along the L-shaped block 14, so that the compression spring 16 is stretched, and then the positioning rod 15 slides away from the L-shaped block 14 located below, and then the mounting block is rotated away from the other mounting block, and then the first laser pen 6 or the second laser pen 8 can be taken out of the pen holder 13 for replacement.

[0032] In a further preferred embodiment of the present invention, an anti-slip pad 17 is mounted on the arc-shaped notch, and the positioning rod 15 is arranged in an L shape.

[0033] In this embodiment, the anti-skid pad 17 is provided to ensure the stability of the first laser pen 6 or the second laser pen 8, thereby ensuring that it will not fall out of the pen holder 13, and the anti-skid effect is good.

[0034] In a further preferred embodiment of the utility model, an electric telescopic rod 18 is fixedly installed on the top of the connecting block 3, a connecting frame is fixedly installed on the output rod of the electric telescopic rod 18, an anti-sliding block 19 is fixedly installed on the connecting frame, and the anti-sliding block 19 is located above the output rod of the scale disk 4.

[0035] In this embodiment, when the semicircular glass brick 5 needs to be fixed at an angle, the electric telescopic rod 18 is first started, so that the electric telescopic rod 18 drives the anti-sliding block 19 to slide, and the anti-sliding block 19 slides to contact the output rod of the scale disk 4, thereby pressing the output rod and limiting the output rod, thereby ensuring that the scale disk 4 will not rotate, and the fixing effect is better.

[0036] In a further preferred embodiment of the utility model, a T-shaped slot is provided on the top of the connecting plate 2, a T-shaped block 20 is fixedly installed on the bottom of the connecting block 3, the T-shaped block 20 is slidably connected to the T-shaped slot, and a limiting rod 21 is slidably installed on one side of the connecting plate 2, and the limiting rod 21 is slidably connected to the T-shaped block 20.

[0037] In this embodiment, when the scale disk 4 needs to be replaced, first pull the limit rod 21 to make the limit rod 21 slide away from the connecting plate 2, then take the connecting block 3 out of the connecting plate 2, and at the same time, the T-block 20 slides away from the T-slot to complete the disassembly of the scale disk 4, which is relatively convenient.

[0038] In a further preferred embodiment of the present invention, both the limiting rod 21 and the connecting plate 2 are equipped with Velcro, and the two Velcros are bonded to each other.

[0039] In this embodiment, the limiting rod 21 is fixed by Velcro to ensure that it will not be separated from the connecting plate 2, and the fixing effect is good.

[0040] In summary, the device can not only demonstrate the total reflection phenomenon and verify the reversibility of the total reflection light path through the use of the scale disk 4, the semicircular glass brick 5, the first laser pen 6 and the second laser pen 8, but also be used to measure the refractive index of the semicircular glass brick 5 and obtain the advantages of experimental data.

[0041] Compared with the related art, the device can not only demonstrate the total reflection phenomenon and verify the reversibility of the total reflection light path through the use of the graduated disk 4, the semicircular glass brick 5, the first laser pen 6 and the second laser pen 8, but also can be used to measure the refractive index of the semicircular glass brick 5 and obtain experimental data. At the same time, it can explore the total reflection phenomenon of transparent liquids, which can not only train students' ability to apply knowledge flexibly, but also stimulate their curiosity, thirst for knowledge, imagination, and love for the world of natural science. The connecting rod 9 is limited by the pressure block 12, thereby ensuring the stability of the semicircular glass brick 5, and the fixing effect is better. At the same time, it is also convenient for the subsequent disassembly of the semicircular glass brick 5. The first laser pen 6 and the second laser pen 8 are installed through the installation mechanism, and the installation is relatively quick.

[0042] In the several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of the above-mentioned units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0043] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A rotating light total reflection demonstration experimental instrument, characterized in that: include: A base and a connecting plate and a supporting rod mounted on the base; A connecting block slidably disposed on the connecting plate; Rotating the graduated disc mounted on the connecting block; A semicircular glass brick and a first laser pen arranged on the scale disc; a second laser pen disposed on the support rod; A fixing mechanism provided on the graduated disc for fixing the semicircular glass bricks; Two mounting mechanisms are respectively arranged on the scale disk and the support rod for mounting the first laser pen and the second laser pen.

2. The rotating light total reflection demonstration experimental device as claimed in claim 1, characterized in that: The fixing mechanism comprises: A connection opening provided on the scale disc; A connecting rod fixedly mounted on one side of the semicircular glass brick, the connecting rod being in sliding contact with the connecting opening; A mounting groove is provided on the connecting rod; A connecting spring mounted in the mounting groove; A pressing block is fixedly mounted on one end of the connecting spring, the pressing block slidably extends out of the mounting groove, and the pressing block is in sliding contact with one side of the scale disk.

3. The rotating light total reflection demonstration experimental device as claimed in claim 1, characterized in that: The mounting mechanism comprises: Two pen holders respectively mounted on the support rod and the scale disc, the two pen holders being hingedly formed by two mounting blocks, one side of the two mounting blocks being provided with an arc-shaped notch, and the two pen holders being respectively connected to the first laser pen and the second laser pen; Two L-shaped blocks fixedly mounted on the two mounting blocks respectively; A positioning rod slidably mounted on any one of the L-shaped blocks, the positioning rod being slidably connected to the other L-shaped block; A compression spring is sleeved on the positioning rod, and two ends of the compression spring are respectively fixedly connected to the L-shaped block and the protruding end of the positioning rod.

4. The rotating light total reflection demonstration experimental device as claimed in claim 3, characterized in that: The arc-shaped notch is equipped with an anti-skid pad, and the positioning rod is arranged in an L shape.

5. The rotating light total reflection demonstration experimental device as claimed in claim 1, characterized in that: An electric telescopic rod is fixedly mounted on the top of the connecting block, a connecting frame is fixedly mounted on the output rod of the electric telescopic rod, an anti-sliding block is fixedly mounted on the connecting frame, and the anti-sliding block is located above the output rod of the scale disc.

6. The rotating light total reflection demonstration experimental device as claimed in claim 1, characterized in that: A T-shaped slot is provided on the top of the connecting plate, a T-shaped block is fixedly installed on the bottom of the connecting block, the T-shaped block is slidably connected to the T-shaped slot, a limiting rod is slidably installed on one side of the connecting plate, and the limiting rod is slidably connected to the T-shaped block.

7. The rotating light total reflection demonstration experimental device as claimed in claim 6, characterized in that: The limiting rod and the connecting plate are both equipped with Velcro, and the two Velcros are bonded to each other.

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