Teaching aid for analog circuit

Abstract

The utility model provides a teaching aid for an analog circuit, and belongs to the technical field of teaching aids. Comprising a slide rheostat, a shifting block and an indicating mechanism, and the indicating mechanism comprises a lifting assembly arranged on a slide rheostat support. Through the arrangement of the square strip, the scale marks and the indication block, when the shifting block moves, the indication block is driven to move, the numerical value of the scale marks corresponding to the indication block is observed, and the numerical value is the resistance value of the slide rheostat and does not need to be calculated in a mode of dividing voltage by current, so that the resistance value is displayed more intuitively and clearly; through the arrangement of the lifting assembly, the push strip and the sliding block, the lifting assembly can reduce the height of the square strip, reduce the occupied area of the whole teaching aid and facilitate carrying and storage, meanwhile, after the height of the square strip is reduced, the push strip is separated from the movable block at the indication block, and after separation, the indication block drives the sliding block to move downwards along the inner wall of the sliding groove to reduce the height of the indication block. And the tip of the top of the indicating block is prevented from being damaged when the teaching aid is stored.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching aids, in particular to a teaching aid for simulating circuits. Background Art

[0002] In the teaching of analog circuits, wires, switches, batteries, sliding rheostats, ammeters, voltmeters and light bulbs are required. The sliding rheostat is used to change the resistance value in the entire circuit. The sliding rheostat is mainly composed of a bracket, a porcelain tube, a metal tube, a coil formed by winding the resistance wire, a slider, a dial block and a terminal. Moving the dial block changes the position of the slider and the contact position between the slider and the coil, thereby changing the resistance value of the sliding rheostat. The resistance value is calculated by dividing the voltage by the current.

[0003] When using a sliding rheostat teaching aid in the process of teaching analog circuits, the slider is moved by the dial block, and the contact position of the slider and the coil is changed, thereby changing the resistance value of the sliding rheostat. The resistance value can be calculated by dividing the voltage displayed on the voltmeter by the current displayed on the ammeter. The resistance value of the sliding rheostat can only be obtained by calculation, and the resistance value of the sliding rheostat cannot be seen intuitively. Therefore, the present application provides a teaching aid for analog circuits to meet the needs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a teaching aid for simulating circuits to solve the technical problem that the resistance value of the circuit can only be obtained by calculation and the resistance value of a sliding resistor cannot be intuitively seen.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A teaching aid for simulating circuits, comprising a sliding rheostat and a dial block, and further comprising:

[0007] The indicating mechanism includes a lifting assembly arranged on a sliding rheostat bracket, a square bar is provided on the side of the lifting assembly, and a scale line is engraved on the side of the square bar close to the shift block. An indicating block is provided on the side of the shift block. After the shift block drives the indicating block to move, the value of the corresponding scale line is the resistance value of the sliding rheostat when it is in the working state.

[0008] Preferably, the lifting assembly includes a guide block fixed on the sliding rheostat bracket, a guide rod movably passing through the guide block, a connecting block is fixed on the guide rod, the connecting block is fixed on the side of the square bar away from the indicating block, and a magnetic limit plate is fixed at the bottom of the guide rod, and the magnetic limit plate is magnetically attracted to the bottom of the guide block.

[0009] Preferably, there are two guide rods, and the two guide rods are symmetrically arranged with a vertical plane passing through the center of the square bar as a symmetry plane.

[0010] Preferably, the guide rod is in the shape of a regular hexagon.

[0011] Preferably, the central axis of the magnetic limiting disk coincides with the central axis of the guide rod.

[0012] Preferably, a reinforcing rib is fixed to the bottom of the guide block, and the reinforcing rib is fixed to the side of the sliding rheostat bracket.

[0013] Preferably, the top of the indicator block is in an inverted V shape.

[0014] Preferably, a push bar is fixed to the side of the square bar close to the shift block, a slide groove is provided on the side of the shift block close to the square bar, a slider that moves up and down along the inner wall of the slide groove is fixed to the side of the indicator block away from the square bar, and a movable block is fixed to the side of the indicator block away from the shift block, and the movable block is attached to the top of the push bar.

[0015] Preferably, the length of the push bar is the same as the length of the square bar.

[0016] Preferably, the slider is in the shape of an isosceles trapezoid, and the shape of the sliding groove is adapted to the shape of the slider.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] In the above scheme, through the setting of square bars, scale lines and indicator blocks, when the dial block moves, the indicator block is driven to move. The value of the scale line corresponding to the indicator block is observed. This value is the resistance value of the sliding rheostat. There is no need to calculate it by dividing the voltage by the current, making the display of the resistance value more intuitive and clear.

[0019] By setting the lifting assembly, the push bar and the slider, the lifting assembly can be used to lower the height of the square bar, thereby reducing the occupied area of ​​the entire teaching aid and facilitating carrying and storage. At the same time, after the height of the square bar is lowered, the push bar is separated from the movable block at the indicator block. After separation, the indicator block drives the slider to move downward along the inner wall of the slide groove to lower the height of the indicator block, thereby preventing the tip of the top of the indicator block from being damaged when the teaching aid is stored. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a right sectional view of the shift block of the utility model;

[0022] Figure 3 This is an enlarged view of the square structure of the utility model;

[0023] Figure 4 This is a cross-sectional view of the guide rod of the present utility model;

[0024] Figure 5 This is a top cross-sectional view of the slider of the present invention.

[0025] Reference numerals:

[0026] 1. Sliding rheostat; 2. Dial block; 3. Indicating mechanism; 31. Square bar; 32. Scale line; 33. Lifting assembly; 331. Guide rod; 332. Guide block; 333. Magnetic limit plate; 334. Connecting block; 335. Reinforcing rib; 34. Indicating block; 35. Push bar; 36. Movable block; 37. Slider; 38. Slide groove. DETAILED DESCRIPTION

[0027] The following describes in detail a teaching aid for analog circuits provided by the present invention, with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative implementations for known techniques. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0028] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0029] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0030] like Figure 1-Figure 5 As shown, the embodiment of the present invention provides a teaching aid for simulating circuits, including a sliding rheostat 1 and a dial block 2, and further comprising:

[0031] Indicator mechanism 3, indicating mechanism 3 includes a lifting assembly 33 provided on the bracket of sliding rheostat 1, a square bar 31 is provided on the side of lifting assembly 33, and a scale line 32 is engraved on the side of square bar 31 close to the dial block 2, and an indicator block 34 is provided on the side of dial block 2. After the indicator block 34 is moved by the dial block 2, the value of the corresponding scale line 32 is the resistance value of sliding rheostat 1 in the working state. First, connect the terminal at the left bracket of sliding rheostat 1 with a wire, and then connect the terminal at the right end of the coil with another wire, so as to realize the sliding rheostat 1 and To connect the circuit, move the dial block 2, which drives the slider to move and change the contact position with the coil, thereby changing the resistance value of the sliding rheostat 1. When the dial block 2 moves, it drives the indicator block 34 to move along the front side of the square bar 31. Observe the value of the scale line 32 corresponding to the indicator block 34. This value is the resistance value of the sliding rheostat 1. There is no need to calculate the resistance value by dividing the voltage by the current, making the display of the resistance value more intuitive and clear. This value can be verified with the resistance value obtained by dividing the voltage by the current, thereby improving the user's training ability.

[0032] like Figure 4 When the lifting mechanism 331 is lifted up, the lifting mechanism 331 can be lifted up after the lifting of the lifting mechanism 331. The lifting mechanism 331 can be lifted up after the lifting of the lifting mechanism 331. When the lifting mechanism 331 is lifted up, the lifting mechanism 331 can be lifted up after the lifting of the lifting mechanism 331.

[0033] like Figure 1 As shown, in this embodiment, there are two guide rods 331, and the two guide rods 331 are symmetrically arranged with the central vertical plane passing through the square bar 31 as the symmetry plane. The two guide rods 331 jointly guide the lifting and lowering of the square bar 31, making the lifting and lowering of the square bar 31 more stable and smooth.

[0034] like Figure 1 As shown, in this embodiment, the guide rod 331 is in a regular hexagon, which increases the contact area between the guide rod 331 and the inner wall of the guide block 332, improves the guiding ability of the guide rod 331, and thus improves the guiding ability of the other bar 31.

[0035] like Figure 4As shown, in this embodiment, the central axis of the magnetic limit plate 333 coincides with the central axis of the guide rod 331, ensuring that the magnetic limit plate 333 and the guide rod 331 are concentric, thereby ensuring that the magnetic limit plate 333 can stably position the guide rod 331.

[0036] like Figure 4 As shown, in this embodiment, a reinforcing rib 335 is fixed to the bottom of the guide block 332, and the reinforcing rib 335 is fixed to the side of the sliding rheostat 1 bracket. The reinforcing rib 335 is used to increase the contact area between the guide block 332 and the sliding rheostat 1 bracket, thereby improving the connection strength between the guide block 332 and the sliding rheostat 1 bracket.

[0037] like Figure 1 As shown, in this embodiment, the top of the indicator block 34 is in an inverted V shape. The inverted V shape is used to form a pointed tip at the top of the indicator block 34, making it easier for the user to observe the scale line 32 to which the indicator block 34 specifically points.

[0038] like Figure 1 、 Figure 3 and Figure 5 As shown, in this embodiment, a push bar 35 is fixed to the side surface of the square bar 31 close to the shift block 2, and a slide groove 38 is opened on the side of the shift block 2 close to the square bar 31. A slider 37 that moves up and down along the inner wall of the slide groove 38 is fixed to the side of the indicator block 34 away from the square bar 31, and a movable block 36 is fixed to the side of the indicator block 34 away from the shift block 2. The movable block 36 fits on the top of the push bar 35. During the upward movement of the square bar 31, the push bar 35 drives the push bar 35 to fit with the movable block 36. During the upward movement of the push bar 35 following the square bar 31, the movable block 36 drives the indicator block 34 to move upward. The indicator block 34 drives the slider 37 to move upward along the inner wall of the slide groove 38. After the indicator block 34 moves upward, the pointed end of the top of the indicator block 34 extends from the top of the shift block 2, and it is convenient to observe the scale line 32 corresponding to the indicator block 34 after it extends.

[0039] like Figure 1 As shown, in this embodiment, the length of the push bar 35 is the same as the length of the square bar 31, which prevents the movable block 36 from separating from the push bar 35 during the movement of the shift block 2, thereby ensuring the limiting ability of the push bar 35 on the movable block 36 and the indicator block 34.

[0040] like Figure 5 As shown, in this embodiment, the slider 37 is an isosceles trapezoid, and the shape of the slide groove 38 is adapted to the shape of the slider 37, preventing the slider 37 from separating from the slide groove 38 in the horizontal direction, thereby achieving stable guidance of the indicator block 34 during vertical movement.

[0041] Working principle: First, connect the terminal at the left side of the sliding rheostat 1 to a wire, and then connect the terminal at the right end of the coil to another wire, so as to achieve the connection between the sliding rheostat 1 and the circuit, pull the square bar 31 upward so that the square bar 31 drives the guide rod 331 to move upward along the inner wall of the guide block 332 through the connecting block 334, and the guide rod 331 drives the magnetic limit plate 333 to fit with the bottom of the guide block 332, and the height of the square bar 31 is positioned by the magnetic limit plate 333. The square bar 31 moves upward through During the movement, the push bar 35 is driven to move upward, and after the push bar 35 moves upward to the moving height, it is in contact with the bottom of the movable block 36. When the push bar 35 continues to move upward, the movable block 36 drives the indicator block 34 to move upward, and the indicator block 34 drives the slider 37 to move upward along the inner wall of the slide groove 38. When the square bar 31 moves to the highest state, the indicator block 34 rises to the highest state, and at the same time, the slider 37 is in contact with the top of the inner wall of the slide groove 38. After the indicator block 34 rises to the highest state, the pointed top of the indicator block 34 protrudes from the top of the dial block 2.

[0042] After the square bar 31 is positioned, the shift block 2 is moved. The shift block 2 drives the slider to change the contact position with the coil, thereby changing the resistance value of the sliding rheostat 1. When the shift block 2 moves, it drives the indicator block 34 to move along the front side of the square bar 31. Observe the value of the scale line 32 corresponding to the indicator block 34. This value is the resistance value of the sliding rheostat 1. Stop moving the shift block 2 after it moves to the appropriate position.

[0043] After use, the square bar 31 is moved downward to separate the magnetic limit plate 333 from the bottom of the guide block 332. The square bar 31 moves downward and fits the top of the guide block 332, lowering the height of the square bar 31 and reducing the occupied area of ​​the entire teaching aid, thereby facilitating the storage and carrying of the teaching aid. When the square bar 31 moves downward, it drives the push bar 35 to move downward, and the push bar 35 no longer limits the movable block 36 and the indicator block 34. At this time, the indicator block 34 drives the slider 37 to move downward along the inner wall of the slide groove 38 under the action of its own weight until the slider 37 fits the bottom of the inner wall of the slide groove 38. At this time, the pointed tip of the top of the indicator block 34 no longer extends from the top of the dial block 2, preventing the pointed tip of the top of the indicator block 34 from being damaged when the teaching aid is stored.

[0044] The present invention encompasses any substitutions, modifications, equivalent methods, and solutions that are not within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail in the preferred embodiments of the present invention above, but those skilled in the art can fully understand the present invention without these detailed descriptions.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A teaching aid for simulating circuits, comprising a sliding rheostat (1) and a dial block (2), characterized in that: Also includes: An indicating mechanism (3) includes a lifting assembly (33) arranged on a support of the sliding rheostat (1), a square bar (31) being arranged on a side of the lifting assembly (33), a scale line (32) being engraved on a side of the square bar (31) close to the shift block (2), an indicating block (34) being arranged on a side of the shift block (2), and a value of the corresponding scale line (32) after the shift block (2) drives the indicating block (34) to move is the resistance value of the sliding rheostat (1) in the working state.

2. The teaching aid for analog circuits according to claim 1, wherein: The lifting assembly (33) includes a guide block (332) fixed on a bracket of the sliding rheostat (1); a guide rod (331) movably extends through the guide block (332); a connecting block (334) is fixed on the guide rod (331); the connecting block (334) is fixed on a side of the square bar (31) away from the indicating block (34); a magnetic limiting disk (333) is fixed on the bottom of the guide rod (331); and the magnetic limiting disk (333) is magnetically attracted to the bottom of the guide block (332).

3. The teaching aid for analog circuits according to claim 2, wherein: The number of the guide rods (331) is two, and the two guide rods (331) are symmetrically arranged with the central vertical plane passing through the square bar (31) as a symmetry plane.

4. The teaching aid for analog circuits according to claim 2, wherein: The guide rod (331) is in the shape of a regular hexagon.

5. The teaching aid for analog circuits according to claim 2, wherein: The central axis of the magnetic limiting disk (333) coincides with the central axis of the guide rod (331).

6. The teaching aid for analog circuits according to claim 2, wherein: A reinforcing rib (335) is fixed to the bottom of the guide block (332), and the reinforcing rib (335) is fixed to the side of the sliding rheostat (1) bracket.

7. The teaching aid for analog circuits according to claim 1, wherein: The top of the indicator block (34) is in an inverted V shape.

8. The teaching aid for analog circuits according to claim 1, wherein: A push bar (35) is fixed to the side of the square bar (31) close to the shift block (2), a slide groove (38) is provided on the side of the shift block (2) close to the square bar (31), a slider (37) is fixed to the side of the indicator block (34) away from the square bar (31) and moves up and down along the inner wall of the slide groove (38), and a movable block (36) is fixed to the side of the indicator block (34) away from the shift block (2), and the movable block (36) is attached to the top of the push bar (35).

9. The teaching aid for analog circuits according to claim 8, wherein: The length of the push bar (35) is the same as the length of the square bar (31).

10. The teaching aid for analog circuits according to claim 8, wherein: The slider (37) is in the shape of an isosceles trapezoid, and the shape of the chute (38) is adapted to the shape of the slider (37).

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