Light refraction demonstration device for junior high school physics

Abstract

The utility model discloses a junior high school physics light refraction demonstration device comprising a disc, the front side of the disc is provided with an arc-shaped medium groove, and the rear side of the disc is fixedly provided with a magnetic fluted disc; a vertical rod is arranged on the base, one side of the upper end of the vertical rod is rotationally connected with the center of the disc through a connecting rod, a first magnetic part is fixedly arranged on the vertical rod, an adjusting cylinder is arranged at the lower end of the vertical rod in a sliding mode, and a second magnetic part matched with the first magnetic part is fixedly arranged at the upper end of the adjusting cylinder; a sliding tooth groove is formed in the side, facing the disc, of the adjusting cylinder, an adjusting rod transversely penetrates through the sliding tooth groove, the end, inwards penetrating out of the sliding tooth groove, of the adjusting rod is rotationally connected with the vertical rod, and a rod body of the adjusting rod is provided with a first gear used for being meshed with the sliding tooth groove; a second gear matched with the magnetic fluted disc is arranged at the far end of the adjusting rod; a laser pen is further arranged on the front side of the disc.

Description

Technical Field

[0001] The utility model relates to the technical field related to junior high school physics, in particular to a junior high school physics light refraction demonstration device. Background Art

[0002] The refraction of light occurs at the junction of two media, and the refracted light enters from one medium into another. Since the speed of light propagation in different media is different, the direction will change when propagating at the junction of two media. In the teaching process of physical optics in junior high schools, in order to better enable students to master and understand optical knowledge, some demonstration devices are often used to make simulation demonstrations so that students can observe the phenomenon of light refraction more intuitively.

[0003] The Chinese patent authorization announcement number CN211124645U discloses an optical refraction demonstration device for junior high school physics teaching, including a base, a fixed rod fixedly installed on the top wall of the base, a movable rod inserted on the top wall of the fixed rod, a fastening bolt inserted on the outer wall of the fixed rod, a disc fixedly installed on the top wall of the movable rod, scale lines evenly arranged on the outer wall of one side of the disc, a refractive medium installed at the axis of the disc close to the scale line, and a laser pen installed on the outer wall of one end of the disc. The utility model can fix the laser pen on the disc to prevent the laser pen from shaking during the experiment and causing experimental errors. The position of the laser pen can be moved freely, so that the most suitable light source incident angle can be selected, so that students can more intuitively observe the refraction of light in different media, and the height of the disc can be freely adjusted, which is highly practical. However, in the above patent, when replacing the medium, the entire device needs to be turned upside down to pour out the refractive medium, which makes the medium replacement inconvenient, affects the efficiency of use, and wastes the time for doing experiments in class. Utility Model Content

[0004] The utility model aims to provide a junior high school physics light refraction demonstration device, so as to realize that when the medium is replaced, there is no need to invert the entire device.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions, a junior high school physics light refraction demonstration device, comprising:

[0006] A disc, wherein an arc-shaped medium groove is arranged on the front side of the disc, and a magnetic toothed disc is fixedly arranged on the rear side;

[0007] A base, wherein a vertical rod is arranged on the base, one side of the upper end of the vertical rod is rotatably connected to the center of the disk through a connecting rod, a first magnetic part is fixedly arranged on the vertical rod, an adjusting cylinder is slidably arranged at the lower end of the vertical rod, a second magnetic part cooperating with the first magnetic part is fixedly arranged on the upper end of the adjusting cylinder, a sliding tooth groove is provided on the side of the adjusting cylinder facing the disk, an adjusting rod is horizontally penetrated in the sliding tooth groove, one end of the adjusting rod passing inwardly through the sliding tooth groove is rotatably connected to the vertical rod, a rod body of the adjusting rod is provided with a first gear for meshing with the sliding tooth groove, and a second gear cooperating with the magnetic toothed disk is provided at the far end of the adjusting rod;

[0008] A laser pen is also provided on the front side of the disc, and the laser pen is fixed by a support seat. The support seat extends to the rear side of the disc and is fixed to a rotating rod. The other end of the rotating rod is rotatably connected to the connecting rod, and a positioning mechanism is provided between the rotating rod and the disc.

[0009] Preferably, an upper slide groove and a lower slide groove are arranged in parallel on the front side of the disc, and a scale plate is slidably arranged on the upper slide groove and the lower slide groove, and the arc-shaped medium groove is arranged on the scale plate, and the center of the arc-shaped medium groove coincides with the center of the scale plate.

[0010] Preferably, the positioning mechanism comprises: a movable rod, the movable rod movably passes through the rotating rod, an adjustment block is arranged at the outer end of the movable rod, and a third magnetic member cooperating with the magnetic gear disc is arranged at the inner end of the movable rod.

[0011] Preferably, a fourth magnetic component cooperating with the third magnetic component is fixedly provided on the side of the rotating rod facing the disc, and the movable rod passes through the fourth magnetic component.

[0012] Preferably, the magnetic toothed disc is an iron plate.

[0013] Preferably, the first magnetic member and the second magnetic member may be magnetic rings or magnets.

[0014] Preferably, the third magnetic component and the fourth magnetic component may be magnetic rings or magnets.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model has reasonable design and simple structure. A connecting rod is used to rotatably connect the disk center to one side of the upper end of the vertical rod, so that the disk can be rotated to pour out and replace the medium in the arc-shaped medium groove. A first magnetic part is fixedly arranged on the vertical rod, and an adjusting cylinder is slidably arranged on the lower end of the vertical rod. A second magnetic part cooperating with the first magnetic part is fixedly arranged on the upper end of the adjusting cylinder. During use, the arc-shaped medium groove contains the medium. In order to prevent the medium from shaking due to the rotation of the disk, thereby affecting the refracted light and the refraction accuracy and making it inconvenient to observe, the disk is fixed by the cooperation of the first magnetic part and the second magnetic part. That is, when the first magnetic part and the second magnetic part are magnetically attracted, the arc-shaped medium groove is in a horizontal use state; a sliding tooth groove is provided on the side of the adjusting cylinder facing the disk, and an adjusting rod is arranged in the sliding tooth groove and is rotatably connected to the vertical rod. One end of the adjusting rod has a surface A first gear that cooperates with the sliding tooth groove is fixedly provided on the surface, and a second gear that cooperates with the magnetic toothed disk is provided at the other end; when changing the medium, slide the adjustment cylinder downward, the sliding tooth groove on the adjustment cylinder drives the first gear to rotate, the first gear drives the adjustment rod to rotate, the adjustment rod drives the second gear to rotate, the second gear drives the magnetic toothed disk to rotate, and then the magnetic toothed disk drives the circular disk to rotate, so that the arc-shaped medium groove on the circular disk rotates, and the medium in the arc-shaped medium groove is poured out; then slide the adjustment cylinder upward, so that the second magnetic part at the upper end of the adjustment cylinder is fixed to the first magnetic part on the vertical rod, thereby fixing the circular disk and returning the arc-shaped medium groove to a horizontal state; this adjustment method is simple, convenient and easy to operate, which improves the efficiency of changing the medium, saves the time spent on changing the medium, and allows more experiments to be done in class. A laser pen is also provided on the front side of the disc. The laser pen is fixed by a support seat. The support seat extends to the back side of the disc and is fixed to a rotating rod. The other end of the rotating rod is rotatably connected to a connecting rod. The support seat makes it easier to install and replace the laser pen. When in use, the laser pen installed on the support seat is turned on, and the rotating rod is rotated. The rotating rod drives the support seat set on the rotating rod to rotate, and the support seat drives the laser pen installed on the support seat to rotate, thereby adjusting the angle of the laser pen's light entering the medium. A positioning mechanism is provided between the rotating rod and the disc to fix the laser pen's intake angle to prevent the shaking of the incoming light from affecting the accuracy and observation effect.

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a junior high school physics light refraction demonstration device proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the rear structure of a junior high school physics light refraction demonstration device proposed by the utility model;

[0020] Figure 3This is a partial structural schematic diagram of a junior high school physics light refraction demonstration device proposed by the utility model;

[0021] Figure 4 The utility model is a schematic diagram of the positioning mechanism of a junior high school physics light refraction demonstration device.

[0022] In the figure, 100, a disc; 110, an upper slide groove; 120, a lower slide groove; 130, a magnetic toothed disc; 200, a scale plate; 210, an arc-shaped medium groove; 300, a base; 310, a vertical pole; 311, a first magnetic member; 312, an adjusting cylinder; 3121, a second magnetic member; 3122, a sliding tooth groove; 320, an adjusting rod; 321, a first gear; 322, a second gear; 330, a connecting rod; 400, a rotating rod; 410, a supporting seat; 411, a laser pen; 500, a positioning mechanism; 510, a movable rod; 511, an adjusting block; 512, a third magnetic member; 520, a fourth magnetic member. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] Reference Figure 1-4 The utility model provides a junior high school physics light refraction demonstration device, comprising:

[0026] The disk 100 has an arc-shaped medium groove 210 on the front side and a magnetic toothed disk 130 fixedly disposed on the rear side; the magnetic toothed disk 130 can be a magnet or a magnetic ring, as long as the magnetic toothed disk 130 can be magnetically fixed to the third magnetic member 512. Specifically in this embodiment, the magnetic toothed disk 130 is an iron plate.

[0027] The base 300 is provided with a vertical rod 310, and one side of the upper end of the vertical rod 310 is rotatably connected to the center of the disk 100 through a connecting rod 330, so as to facilitate the rotating disk 100 to pour out and replace the medium in the arc-shaped medium groove 210. A first magnetic member 311 is fixedly provided on the vertical rod 310, and an adjustment cylinder 312 is slidably provided at the lower end of the vertical rod 310. A second magnetic member 3121 cooperating with the first magnetic member 311 is fixedly provided at the upper end of the adjustment cylinder 312. The first magnetic member 311 and the second magnetic member 3121 can be magnets or magnetic rings, as long as the first magnetic member 311 can be fixed to the second magnetic member 3121 by magnetic attraction. Specifically in this embodiment, the first magnetic member 311 and the second magnetic member 3121 are magnetic rings. During use, the arc-shaped medium slot 210 contains a medium. To prevent the medium from shaking due to the rotation of the disc 100, thereby affecting the refracted light and the refraction accuracy and making observation inconvenient, the disc 100 is fixed by the cooperation of the first magnetic member 311 and the second magnetic member 3121. That is, when the first magnetic member 311 and the second magnetic member 3121 are magnetically attracted, the arc-shaped medium slot 210 is in a horizontal use state.

[0028] The adjusting cylinder 312 is provided with a sliding tooth groove 3122 on the side facing the disk 100, and the adjusting rod 320 is transversely inserted into the sliding tooth groove 3122. One end of the adjusting rod 320 that passes through the sliding tooth groove 3122 inward is rotatably connected to the vertical rod 310. The rod body of the adjusting rod 320 is provided with a first gear 321 for meshing with the sliding tooth groove 3122, and the far end of the adjusting rod 320 is provided with a second gear 322 that cooperates with the magnetic toothed disk 130. When replacing the medium, the adjusting cylinder 312 is slid downward, and the sliding tooth groove 3122 on the adjusting cylinder 312 drives the first gear 321 to rotate, and the first gear 321 drives the adjusting rod 320 to rotate, and the adjusting rod 320 drives the second gear 321 to rotate. 22 rotates, the second gear 322 drives the magnetic toothed disc 130 to rotate, and then the magnetic toothed disc 130 drives the disc 100 to rotate, so that the arc-shaped medium slot 210 on the disc 100 rotates, and the medium in the arc-shaped medium slot 210 is poured out; then the adjusting cylinder 312 is slid upward, so that the second magnetic member 3121 at the upper end of the adjusting cylinder 312 is magnetically fixed to the first magnetic member 311 on the vertical rod 310, thereby fixing the disc 100 and returning the arc-shaped medium slot 210 to a horizontal state; this adjustment method is simple, convenient and easy to operate, improves the efficiency of changing the medium, saves the time spent on changing the medium, and allows more experiments to be done in class.

[0029] A laser pen 411 is also provided on the front side of the disc 100, and the laser pen 411 is fixed by a support base 410. The support base 410 extends to the rear side of the disc 100 and is fixed to a rotating rod 400. The other end of the rotating rod 400 is rotatably connected to the connecting rod 330, and a positioning mechanism 500 is provided between the rotating rod 400 and the disc 100.

[0030] An upper slide groove 110 and a lower slide groove 120 are arranged in parallel on the front side of the disc 100 , and a scale plate 200 is slidably arranged on the upper slide groove 110 and the lower slide groove 120 . An arc-shaped medium groove 210 is arranged on the scale plate 200 , and the center of the arc-shaped medium groove 210 coincides with the center of the scale plate 200 .

[0031] By setting the upper slide groove 110 and the lower slide groove 120, the position of the arc-shaped medium groove 210 can be moved left and right, which is convenient for angle adjustment and observation at different angles. With the rotatable laser pen 411, observation at more angles can be achieved. Setting two arc-shaped medium grooves 210 can be used to observe and study the phenomenon of light refraction when it enters another medium from air, and can also observe and study the refraction phenomenon when light enters another medium from a medium other than air; for example, water and salt water are poured into the two arc-shaped medium grooves 210 respectively, so that the refraction phenomenon when light enters water and then salt water can be observed. The setting of the scale plate 200 makes observation more convenient and intuitive. By setting the medium groove into an arc, the propagation direction of the light will not change when the light exits the arc-shaped medium groove 210.

[0032] The positioning mechanism 500 includes: a movable rod 510, the movable rod 510 movably passes through the rotating rod 400, an adjustment block 511 is arranged at the outer end of the movable rod 510, and a third magnetic member 512 cooperating with the magnetic toothed disc 130 is arranged at the inner end; the third magnetic member 512 can be a magnet or a magnetic ring, as long as the third magnetic member 512 can be magnetically fixed with the magnetic toothed disc 130 and the fourth magnetic member 520. Specifically in this embodiment, the third magnetic member 512 is a magnet. During use, the incident angle of the light emitted by the laser pen 411 is adjusted by rotating the rotating rod 400. After the incident angle is adjusted, the third magnetic member 512 on the movable rod 510 is magnetically attracted to the magnetic toothed disc 130 on the back surface of the disc 100, thereby fixing the rotating rod 400, so that the light emitted by the laser pen 411 will not shake, and the observation is more accurate.

[0033] A fourth magnetic member 520 that cooperates with the third magnetic member 512 is fixedly provided on the side of the rotating rod 400 facing the disc 100, and the movable rod 510 passes through the fourth magnetic member 520; the fourth magnetic member 520 can be a magnet or a magnetic ring, as long as the fourth magnetic member 520 can be fixed by magnetic attraction with the third magnetic member 512. Specifically, in this embodiment, the fourth magnetic member 520 is a magnet. Since there is always suction between the third magnetic member 512 and the magnetic toothed disc 130, the adjustment block 511 needs to be pulled during the adjustment process, which will affect the adjustment of the angle of the light emitted by the laser pen 411. Through the setting of the fourth magnetic member 520, the third magnetic member 512 and the fourth magnetic member 520 are magnetic during the adjustment process, thereby offsetting the suction between the third magnetic member 512 and the magnetic toothed disc 130, and there is no need to pull the adjustment block 511 all the time, so that the adjustment of the angle of the light emitted by the laser pen 411 is more accurate.

[0034] Working principle: During use, the second magnetic member 3121 is fixed to the first magnetic member 311 on the vertical rod 310, thereby positioning and fixing the disk 100, and then the rotating rod 400 is rotated to adjust the incident angle of the light emitted by the laser pen 411. After the incident angle is adjusted, the third magnetic member 512 on the movable rod 510 and the magnetic toothed disk 130 on the back surface of the disk 100 are magnetically fixed to the rotating rod 400, and then the positions of the two arc-shaped medium slots 210 can be adjusted as needed to complete the light refraction demonstration. During the demonstration, the third magnetic member 512 can also be removed from the magnetic toothed disk 130 by pulling the adjustment block 511 and magnetically attracted to the fourth magnetic member 520, and then the rotating rod 400 is rotated to further adjust the incident angle of the light. After adjustment, the adjustment block 511 is pushed to fix the third magnetic member 512 on the movable rod 510 to the magnetic toothed disk 130 on the back surface of the disk 100. The magnetic toothed disk 130 on the rear surface of the disk 100 magnetically attracts and fixes the rotating rod 400. When the demonstration is over or the medium is changed, the adjusting cylinder 312 is slid downward, and the sliding tooth groove 3122 on the adjusting cylinder 312 drives the first gear 321 to rotate, and the first gear 321 drives the adjusting rod 320 to rotate, and the adjusting rod 320 drives the second gear 322 to rotate, and the second gear 322 drives the magnetic toothed disk 130 to rotate, and then the magnetic toothed disk 130 drives the disk 100 to rotate, so that the arc-shaped medium groove 210 on the disk 100 rotates, and the medium in the arc-shaped medium groove 210 is poured out; then the adjusting cylinder 312 is slid upward to fix the second magnetic member 3121 at the upper end of the adjusting cylinder 312 with the first magnetic member 311 on the vertical rod 310, thereby fixing the disk 100 and returning the arc-shaped medium groove 210 to a horizontal state.

[0035] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A junior high school physics light refraction demonstration device, characterized in that: include: A circular disc (100), wherein an arc-shaped medium groove (210) is arranged on the front side of the circular disc (100), and a magnetic toothed disc (130) is fixedly arranged on the rear side; A base (300) is provided on the base (300), and one side of the upper end of the upright pole (310) is rotatably connected to the center of the disk (100) through a connecting rod (330), and a first magnetic member (311) is fixedly provided on the upright pole (310), and an adjustment cylinder (312) is slidably provided on the lower end of the upright pole (310), and a second magnetic member (3121) cooperating with the first magnetic member (311) is fixedly provided on the upper end of the adjustment cylinder (312), and the adjustment cylinder (312) faces the A sliding tooth groove (3122) is provided on one side of the disk (100), and an adjusting rod (320) is transversely inserted into the sliding tooth groove (3122). One end of the adjusting rod (320) that passes inward through the sliding tooth groove (3122) is rotatably connected to the vertical rod (310), and a first gear (321) for meshing with the sliding tooth groove (3122) is provided on the rod body of the adjusting rod (320), and a second gear (322) for matching with the magnetic toothed disk (130) is provided at the far end of the adjusting rod (320); A laser pen (411) is also provided on the front side of the circular disk (100), and the laser pen (411) is fixed via a support seat (410). The support seat (410) extends to the rear side of the circular disk (100) and is fixed to a rotating rod (400). The other end of the rotating rod (400) is rotatably connected to the connecting rod (330), and a positioning mechanism (500) is provided between the rotating rod (400) and the circular disk (100).

2. The junior high school physics light refraction demonstration device according to claim 1 is characterized in that: An upper slide groove (110) and a lower slide groove (120) are arranged in parallel and transversely on the front side of the circular disk (100); a scale disk (200) is slidably arranged on both the upper slide groove (110) and the lower slide groove (120); the arc-shaped medium groove (210) is arranged on the scale disk (200); and the center of the arc-shaped medium groove (210) coincides with the center of the scale disk (200).

3. The junior high school physics light refraction demonstration device according to claim 1 is characterized in that: The positioning mechanism (500) comprises: a movable rod (510), the movable rod (510) movably passing through the rotating rod (400), an adjusting block (511) being arranged at the outer end of the movable rod (510), and a third magnetic member (512) cooperating with the magnetic toothed disc (130) being arranged at the inner end.

4. The junior high school physics light refraction demonstration device according to claim 3 is characterized in that: A fourth magnetic component (520) that cooperates with the third magnetic component (512) is fixedly arranged on the side of the rotating rod (400) facing the disk (100), and the movable rod (510) passes through the fourth magnetic component (520).

5. The junior high school physics light refraction demonstration device according to claim 1 is characterized in that: The magnetic toothed disc (130) is an iron plate.

6. The junior high school physics light refraction demonstration device according to claim 1 is characterized in that: The first magnetic member (311) and the second magnetic member (3121) may be magnetic rings or magnets.

7. The junior high school physics light refraction demonstration device according to claim 4 is characterized in that: The third magnetic member (512) and the fourth magnetic member (520) may be magnetic rings or magnets.

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