Hooke law demonstration device for physics teaching

Abstract

The utility model relates to the technical field of physics, in particular to a Hooke law demonstration device for physics teaching, which comprises a hollow base, the top of the hollow base is detachably connected with a vertical support plate, the upper end of the vertical support plate is detachably connected with a fixing frame, the fixing frame is provided with symmetrically distributed sliding chutes, the sliding chutes are internally and fixedly connected with sliding rods, and the sliding rods are fixedly connected with the vertical support plate. And a sliding block is slidably arranged on the sliding rod, a mounting plate is fixedly connected to the bottom of the sliding block, and first fixing rings which are symmetrically distributed are fixedly connected to the bottom of the mounting plate. According to the utility model, by comparing the deformation stretching distances of the springs at the left side and the right side during Hooke's law test, the research on the linear relationship between stress and strain (unit deformation) in a material is facilitated, so that the linear proportional relationship between the deformation quantity and the variation quantity of the springs can be intuitively found.

Description

Technical Field

[0001] The utility model relates to the technical field of physics, in particular to a Hooke's law demonstration device for physics teaching. Background Art

[0002] Hooke's law is a basic law in the theory of mechanical elasticity, which states that when a solid material is subjected to force, there is a linear relationship between the stress and strain (unit deformation) in the material. In the process of learning physics courses, it will be demonstrated through relevant experimental devices.

[0003] In the prior art, for example, the patent with publication number CN205827738U discloses a Hooke's law demonstration device, including a cylindrical shell, a long strip window is opened on the surface of the cylindrical shell, a transparent plastic shell is installed on the long strip window, and scale lines are drawn on the transparent plastic shell. A spring is also arranged in the cylindrical shell, and the head end of the spring is fixed to the top of the cylindrical shell. A hanging ring is also arranged on the top of the cylindrical shell. The tail end of the spring is also connected to a hook, and a circular baffle is also arranged between the spring and the hook. This device does not require the use of a ruler. After the hanging code is hung on the hook, students can directly observe the position of the scale line where the baffle at the tail end of the spring is located to read the current length of the spring, which is very convenient to use; in addition, the baffle can also prevent the spring from over-stretching, ensuring that the spring can be restored to its original state intact, and ensuring the service life of the demonstration device.

[0004] However, the Hooke's law demonstration device has the following problems:

[0005] First, the weight of the hanging weight is too heavy, or the students accidentally pull the spring too hard, which may exceed the stretching limit of the spring, making the spring unable to recover. The spring needs to be replaced after the limit stretching. However, in the prior art, the operation of replacing the spring is cumbersome and the time required to replace the spring is long, which affects the demonstration.

[0006] Second, students need to use a ruler to measure the stretched length of the spring, but the spring is in a vertical state and the ruler cannot touch the spring, making it difficult to measure, and the measurement error is large;

[0007] Third, there is no contrast factor in studying the spring stiffness coefficient, which is not convenient for studying the linear relationship between stress and strain (unit deformation) in the material. Utility Model Content

[0008] In order to overcome the shortcomings of the above background technology, the technical problem of the utility model is to provide a Hooke's law demonstration device for physics teaching.

[0009] Technical solution: A Hooke's law demonstration device for physics teaching, comprising a hollow base, a vertical support plate detachably connected to the top of the hollow base, a fixed frame detachably connected to the upper end of the vertical support plate, a symmetrically distributed slide groove is provided on the fixed frame, a slide rod is fixed in the slide groove, a sliding block is slidably arranged on the slide rod, a mounting plate is fixed to the bottom of the sliding block, a symmetrically distributed first fixing ring is fixed to the bottom of the mounting plate, a connecting plate is provided on the lower side of the mounting plate, a symmetrically distributed second fixing ring is fixed to the top of the connecting plate, a hanging ring is fixed to the bottom of the connecting plate, and the hanging ring is located on the axis line of the connecting plate, and an elastic component is provided between the mounting plate and the connecting plate.

[0010] In addition, it is particularly preferred that the elastic component includes a spring and a hook plate, both ends of the spring are fixed with hook plates, the hook plate on the upper side is suspended in cooperation with the first fixing ring, and the hook plate on the lower side is suspended in cooperation with the second fixing ring, so as to facilitate replacement of the elastic component.

[0011] In addition, it is particularly preferred that pointers are fixedly connected to the opposite ends of the connecting plates symmetrically distributed with the vertical support plates, and a scale is embedded in the front end of the vertical support plates. The pointers and the scale cooperate to facilitate viewing the demonstration of Hooke's law.

[0012] In addition, it is particularly preferred that the facing sides of the symmetrically distributed sliding blocks are embedded with magnetic rings, and the inner side wall of the sliding groove is located at a position opposite to the magnetic ring on the sliding block and is also embedded with a magnetic ring, and the position of the sliding block is fixed by magnetic attraction of adjacent magnetic rings.

[0013] In addition, it is particularly preferred that a counterweight block is detachably installed in the hollow base to counterweight the hollow base and prevent it from tipping over.

[0014] In addition, it is particularly preferred that a sliding tube is fixedly connected to the bottom of the mounting plate, a guide rod is fixedly connected to the top of the connecting plate, the guide rod is slidably connected in the sliding tube, and the outer side surface of the guide rod and the inner side of the sliding tube are both smooth surfaces, which are used to reduce the friction resistance between the sliding tube and the guide rod.

[0015] The utility model compares the deformation stretching distances of the springs on the left and right sides during the Hooke's law test, so as to facilitate the study of the linear relationship between stress and strain (unit deformation) in the material. Therefore, it can be more intuitive to find that the deformation amount and the change amount of the spring are in a linear proportional relationship. Through the cooperation of the pointer and the scale, students do not need to use the scale to measure the stretched length of the spring, and the problem of measurement error caused by contacting the spring during the scale measurement can be solved. Through the cooperation of the sliding tube and the guide rod, the downward movement of the connecting plate can be guided and limited, so as to prevent students from accidentally pulling the spring with force, causing the position of the demonstration object to change and affecting the viewing. Through the cooperation of the hook plate on the spring with the first fixing ring on the mounting plate and the second fixing ring on the connecting plate, respectively, the spring can be easily replaced, and it is avoided that the weight of the hanging weight is too heavy or the student accidentally pulls the spring with force, causing the spring to exceed the stretching limit and deform and cannot be replaced, thereby affecting the subsequent demonstration. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the utility model.

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the test assembly of the utility model.

[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the magnetic ring of the utility model.

[0020] Figure 5 It is a side view stereoscopic structural schematic diagram of the utility model.

[0021] Among them, the above-mentioned drawings include the following figure marks: 1-hollow base, 2-vertical support plate, 3-fixed frame, 4-slide groove, 5-slide rod, 6-slide block, 7-mounting plate, 8-first fixed ring, 9-spring, 10-hook plate, 11-connecting plate, 12-second fixed ring, 13-hanging ring, 14-pointer, 15-scale, 16-magnetic ring, 17-counterweight block, 18-slide tube, 19-guide rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] A demonstration device for Hooke's law for physics teaching, such as Figure 1-5 As shown, it includes a hollow base 1, a vertical support plate 2 is installed on the top of the hollow base 1 by bolt connection, a fixing frame 3 is installed on the upper end of the vertical support plate 2 by bolt connection, a slide groove 4 is opened on the left and right sides of the fixing frame 3, a slide rod 5 is fixed in the slide groove 4, a sliding block 6 that slides with the slide groove 4 is slidably arranged on the slide rod 5, and the outer edge of the slide groove 4 is chamfered to facilitate the sliding block 6 to enter the slide groove 4, a mounting plate 7 is fixed to the bottom of the sliding block 6, a first fixing ring 8 is fixed to the left and right sides of the bottom of the mounting plate 7, a connecting plate 11 is provided on the lower side of the mounting plate 7, a second fixing ring 12 is fixed to the left and right sides of the top of the connecting plate 11, and the two second fixing rings 12 correspond to the two first fixing rings 8 respectively, a hanging ring 13 is fixed to the bottom of the connecting plate 11, and the hanging ring 13 is located on the axis line of the connecting plate 11, and a There is an elastic component, which includes a spring 9 and a hook plate 10. The upper and lower ends of the spring 9 are fixedly connected with hook plates 10. The upper and lower distributed hook plates 10 are respectively suspended and matched with the first fixing ring 8 and the second fixing ring 12. When the damaged spring 9 needs to be replaced, the hook plates 10 at the upper and lower ends of the spring 9 are respectively removed from the first fixing ring 8 and the second fixing ring 12 and replaced. To this end, it is avoided that the hanging weight is too heavy or the students accidentally pull the spring 9 with force, causing the spring 9 to exceed the tensile limit and deform and unable to be replaced, thereby affecting the subsequent demonstration. Magnetic rings 16 are embedded on the opposite sides of the left and right sliding blocks 6, and the inner side wall of the slide groove 4 is located at the relative position of the magnetic ring 16 on the sliding block 6. The magnetic ring 16 is also embedded therewith. The position of the sliding block 6 is fixed by magnetic attraction of the adjacent magnetic rings 16. A counterweight block 17 is detachably installed in the hollow base 1 to counterweight the hollow base 1 and prevent it from tipping over.

[0024] Pointers 14 are fixedly connected to the facing ends of the left and right connecting plates 11, and a scale 15 is embedded in the front end of the vertical support plate 2. The pointer 14 and the scale 15 cooperate to facilitate viewing the demonstration of Hooke's law. For this reason, students do not need to use the scale 15 to measure the stretched length of the spring 9, and the problem of measurement error caused by the scale 15 contacting the spring 9 during measurement can be avoided.

[0025] A slide tube 18 is fixedly connected to the bottom of the mounting plate 7, and a guide rod 19 is fixedly connected to the top of the connecting plate 11. The guide rod 19 is slidably connected in the slide tube 18, and the outer side surface of the guide rod 19 and the inner side of the slide tube 18 are both smooth surfaces, which are used to reduce the friction resistance between the slide tube 18 and the guide rod 19. Through the cooperation of the slide tube 18 and the guide rod 19, the downward movement of the connecting plate 11 can be guided and limited, so as to prevent students from accidentally pulling the spring 9 with force, causing the position of the demonstration object to change and affecting the viewing.

[0026] When in use, the user fixes the vertical support plate 2 to the top of the hollow base 1 by bolt connection, and fixes the fixing frame 3 to the top of the vertical support plate 2 by bolt connection, then inserts the sliding block 6 on the sliding rod 5 and slides it into the sliding groove 4. At this time, the magnetic ring 16 on the fixing frame 3 and the magnetic ring 16 on the sliding block 6 are magnetically matched to fix the position of the sliding block 6. Then the user hangs the hook plate 10 on the upper side of the spring 9 on the first fixing ring 8 of the mounting plate 7, and then the user takes the connecting plate 11 and inserts the guide rod 19 on the connecting plate 11 into the sliding tube 1 8, and hang the hook plate 10 on the lower side of the spring 9 on the second fixing ring 12 on the connecting plate 11 to complete the assembly work. When it is necessary to demonstrate Hooke's law on an object, the user first selects a weight of appropriate weight and hangs it on the hanging ring 13 on the left, and then hangs the object to be tested on the hanging ring 13 on the right. Because the weight of the object or the weight will pull the connecting plate 11 downward, the spring 9 begins to deform and stretch. The connecting plate 11 moves downward and the pointer 14 on it cooperates with the scale 15 to display the coefficient of the spring 9 after deformation. By comparing the downward movement distance of the connecting plates 11 on the right and left sides, the demonstration of Hooke's law can be realized. In this way, the deformation stretching distance of the spring 9 on the left and right sides can be compared during the Hooke's law test, which is convenient for studying the linear relationship between stress and strain (unit deformation) in the material. For this reason, it can be more intuitive to find that the deformation amount and the change amount of the spring 9 are in a linear proportional relationship. Through the cooperation of the pointer 14 and the scale 15, students do not need to use the scale 15 to measure the stretching length of the spring 9, and can avoid the scale 15 contacting the spring 9 during measurement to cause measurement errors. The problem of poor performance can be solved by cooperating with the slide tube 18 and the guide rod 19 to guide and limit the downward movement of the connecting plate 11, so as to prevent students from accidentally pulling the spring 9, causing the position of the demonstration object to change and affecting the viewing. The hook plate 10 on the spring 9 cooperates with the first fixing ring 8 on the mounting plate 7 and the second fixing ring 12 on the connecting plate 11, respectively, so that the spring 9 can be easily replaced to avoid excessive weight of the hanging code or students accidentally pulling the spring 9, causing the spring 9 to exceed its tensile limit and deform and unable to be replaced, thereby affecting subsequent demonstrations.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A Hooke's law demonstration device for physics teaching, characterized in that: The invention comprises a hollow base (1), wherein the top of the hollow base (1) is detachably connected to a vertical support plate (2), the upper end of the vertical support plate (2) is detachably connected to a fixing frame (3), the fixing frame (3) is provided with symmetrically distributed sliding grooves (4), a sliding rod (5) is fixedly connected in the sliding groove (4), a sliding block (6) is slidably arranged on the sliding rod (5), a mounting plate (7) is fixedly connected to the bottom of the sliding block (6), a first symmetrically distributed fixing ring (8) is fixedly connected to the bottom of the mounting plate (7), a connecting plate (11) is provided on the lower side of the mounting plate (7), a second symmetrically distributed fixing ring (12) is fixedly connected to the top of the connecting plate (11), a hanging ring (13) is fixedly connected to the bottom of the connecting plate (11), and the hanging ring (13) is located on the axis of the connecting plate (11), and an elastic component is provided between the mounting plate (7) and the connecting plate (11); The elastic component comprises a spring (9) and a hook plate (10), both ends of the spring (9) are fixedly connected with the hook plates (10), the upper hook plate (10) is suspended and matched with the first fixing ring (8), and the lower hook plate (10) is suspended and matched with the second fixing ring (12), so as to facilitate replacement of the elastic component; A slide tube (18) is fixedly connected to the bottom of the mounting plate (7), and a guide rod (19) is fixedly connected to the top of the connecting plate (11). The guide rod (19) is slidably connected to the slide tube (18), and the outer side surface of the guide rod (19) and the inner side of the slide tube (18) are both smooth surfaces, so as to reduce the friction resistance between the slide tube (18) and the guide rod (19).

2. A Hooke's law demonstration device for physics teaching as claimed in claim 1, characterized in that: Pointers (14) are fixedly connected to the opposite ends of the connecting plates (11) symmetrically distributed with the vertical supporting plates (2), and a scale (15) is embedded in the front end of the vertical supporting plates (2). The pointer (14) and the scale (15) cooperate to facilitate viewing of the demonstration of Hooke's law.

3. A Hooke's law demonstration device for physics teaching as claimed in claim 2, characterized in that: Magnetic rings (16) are embedded on the opposite sides of the symmetrically distributed sliding blocks (6), and a magnetic ring (16) is also embedded on the inner side wall of the sliding groove (4) at a position opposite to the magnetic ring (16) on the sliding block (6). The position of the sliding block (6) is fixed by magnetic attraction of adjacent magnetic rings (16).

4. A Hooke's law demonstration device for physics teaching as claimed in claim 3, characterized in that: A counterweight block (17) is detachably mounted in the hollow base (1) and is used to counterweight the hollow base (1) to prevent it from tipping over.

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