Resistance law demonstrator

Abstract

The utility model discloses a resistance law demonstrator, which comprises a bottom plate, a plurality of fixed supporting blocks, a pair of copper wires, a pair of iron wires and a pair of nickel chrome wires, the utility model relates to the technical field of physical demonstration, through the design of the rotary horizontal handle, the operation mode is visual, simple and convenient, and a user can easily control the whole system. And the horizontal threaded rod is matched with the horizontal threaded pipe, so that the stability and accuracy of horizontal movement are ensured, and shaking and deviation in the movement process are effectively avoided. The design not only enhances the reliability of the device, but also improves the accuracy of operation. And the horizontal convex sliding block stably and horizontally stretches in the cross-shaped telescopic groove in the bottom plate, the movement track of the sliding block is clear and stable due to the structural design, and the stability of the whole system is further enhanced. Meanwhile, due to the design of the concave lifting limiting block, stable horizontal stretching and retracting can be conducted on the inner side of the cross-shaped telescopic groove, and therefore the position of the convex lifting limiting block can be accurately adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of physical demonstration, in particular to a resistance law demonstrator. Background Art

[0002] The current resistance law demonstrator used in schools has many deficiencies in the demonstration process and needs to be improved. First, the base design of the demonstrator is not strong enough and is easy to deform, which directly affects the accuracy and stability of the demonstration. Secondly, the resistance wire is too thin and difficult for students to see clearly when observing, which not only reduces the clarity of the demonstration, but also affects students' understanding of the resistance law. Furthermore, the resistance wire is easy to loosen during use, which not only affects the demonstration effect, but also may bring safety hazards.

[0003] In addition, the existing demonstrator can only perform horizontal demonstrations, not vertical demonstrations, which limits the diversity and flexibility of demonstrations. During the operation, we also found that due to design defects, the demonstrator could not intuitively show the change of resistance according to the different connection point positions, which made students confused when understanding the relationship between resistance and connection point position.

[0004] In summary, the existing resistance law demonstrator has obvious deficiencies in stability, clarity, safety, and diversity. In order to improve the demonstration effect and deepen students' understanding of the resistance law, it is necessary to improve and optimize the demonstrator to solve the above problems and make it more in line with teaching needs. In view of this, we conducted in-depth research on the above problems, and this case was created. Utility Model Content

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a resistance law demonstrator, comprising: a bottom plate, a plurality of fixed support blocks, a pair of copper wires, a pair of iron wires and a pair of nickel-chromium wires, wherein the pair of copper wires, the pair of iron wires and the pair of nickel-chromium wires are installed on the bottom plate through the fixed support blocks, and an adjustment detection structure is installed on the bottom plate;

[0006] The adjustment and detection structure comprises: three pairs of clamping blocks, three pairs of horizontal threaded rods, three pairs of horizontal threaded tubes, three pairs of horizontal convex sliders, three pairs of horizontal handles, three pairs of concave lifting limit blocks, three pairs of convex lifting limit blocks, a plurality of lifting limit shafts, a plurality of lifting set springs, three pairs of ball arc metal sheets, three pairs of contact metal balls and six pairs of drainage cables;

[0007] Three pairs of horizontal cross-shaped expansion slots are provided on the bottom plate, three pairs of clamping blocks are evenly installed on the bottom plate, three pairs of horizontal convex sliders are movably inserted into the inner sides of the three pairs of horizontal cross-shaped expansion slots, three pairs of horizontal threaded rods are respectively inserted into the inner sides of the three pairs of horizontal cross-shaped expansion slots through bearings, three pairs of horizontal threaded tubes are respectively inserted into the three pairs of horizontal convex sliders, and the three pairs of horizontal threaded tubes are respectively movably sleeved on the three pairs of horizontal threaded rods, three pairs of horizontal handles are respectively installed on the three pairs of horizontal threaded rods, and three pairs of concave lifting limit blocks are respectively installed on the three pairs of horizontal convex sliders On the upper part, three pairs of the convex lifting limit blocks are respectively movably inserted into the inner sides of the three pairs of the concave lifting limit blocks, a number of the lifting limit shafts are respectively inserted into the three pairs of the concave lifting limit blocks, and a number of the lifting limit shafts are respectively movably inserted into the three pairs of the convex lifting limit blocks, a number of the lifting sleeve springs are respectively sleeved on a number of the lifting limit shafts, three pairs of the ball arc metal sheets are respectively inserted into the three pairs of the convex lifting limit blocks, three pairs of the metal balls are respectively movably arranged on the inner sides of the three pairs of the ball arc metal sheets, and six pairs of the drainage cables are respectively inserted into the three pairs of the clamping blocks and the three pairs of the ball arc metal sheets;

[0008] It should be noted that, in the above, by rotating the horizontal handle, the horizontal threaded rod on the horizontal handle is driven to rotate, and the horizontal threaded rod drives the horizontal threaded tube on its outer side, so that the horizontal threaded tube moves stably horizontally along the horizontal threaded rod, and the horizontal threaded tube drives the horizontal convex slider on it, so that the horizontal convex slider can stably horizontally extend and retract in the cross-shaped expansion groove on the bottom plate, and the concave lifting limit block on it is driven by the horizontal convex slider, so that the concave lifting limit block can stably horizontally extend and retract on the inner side of the cross-shaped expansion groove, thereby changing the convex lifting limit block inside the concave lifting limit block. The position of the positioning block is driven by the convex lifting limit block to drive the ball arc metal sheet and the contact metal ball thereon, and the contact position of the three pairs of contact metal balls with a pair of copper wires, a pair of iron wires and a pair of nickel-chromium wires is changed to adjust the length of the metal wire between the contact metal ball and the clamping block, and the concave lifting limit block is lifted and lowered along several lifting limit axes by several lifting set springs on the inner side, and the convex lifting limit block is elastically pushed by several lifting set springs, so that the contact metal ball on the convex lifting limit block is squeezed and tightly contacted with the metal wire.

[0009] Preferably, a plurality of scales are provided on the bottom plate.

[0010] Preferably, different fuels are respectively arranged on the pair of copper wires, the pair of iron wires and the pair of nickel-chromium wires.

[0011] Preferably, the diameters of the pair of copper wires, the pair of iron wires and the pair of nickel-chromium wires are 3 mm and 5 mm respectively.

[0012] Preferably, a tightness sensor is respectively provided on a plurality of the fixed support blocks.

[0013] Preferably, the plurality of fixed support blocks, the bottom plate and the three pairs of concave lifting limit blocks are all made of PVC material.

[0014] Beneficial Effects

[0015] The utility model provides a resistance law demonstrator. It has the following beneficial effects: the resistance law demonstrator is designed with a rotating horizontal handle, and its operation is intuitive and simple, so that users can easily control the entire system. The cooperation between the horizontal threaded rod and the horizontal threaded tube ensures the stability and accuracy of the horizontal movement, and effectively avoids shaking and deviation during the movement. This design not only enhances the reliability of the device, but also improves the accuracy of the operation; the horizontal convex slider is stably extended and retracted horizontally in the cross-shaped expansion groove on the bottom plate. This structural design makes the movement trajectory of the slider clear and stable, further enhancing the stability of the entire system. At the same time, the design of the concave lifting limit block can be stably extended and retracted horizontally on the inner side of the cross-shaped expansion groove, thereby realizing the precise adjustment of the position of the convex lifting limit block; the convex lifting limit block drives the ball arc metal sheet and the contact metal ball. This design makes the contact between the contact point and the metal wire closer, thereby improving the current transmission efficiency. At the same time, by changing the contact position of the three pairs of contact metal balls with different metal wires, users can easily adjust the resistance to meet different experimental needs; in addition, the lifting set spring design on the inside of the concave lifting limit block can not only provide stable support force, but also can be adjusted according to needs to ensure that the convex lifting limit block always maintains close contact with the metal wire. This elastic push design not only enhances the stability of the system, but also improves its durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the resistance law demonstrator described in the utility model.

[0017] Figure 2 It is a structural schematic diagram of the resistance law demonstrator described in the utility model.

[0018] Figure 3 It is a structural schematic diagram of the resistance law demonstrator described in the utility model.

[0019] In the figure: 1. Base plate; 2. Fixed support block; 3. Copper wire; 4. Iron wire; 5. Nickel-chromium wire; 6. Clamping block; 7. Horizontal threaded rod; 8. Horizontal threaded tube; 9. Horizontal convex slider; 10. Horizontal handle; 11. Concave lifting limit block; 12. Convex lifting limit block; 13. Lifting limit shaft; 14. Lifting set spring; 15. Ball arc metal sheet; 16. Contact metal ball; 17. Drainage cable. DETAILED DESCRIPTION

[0020] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0021] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principles and processes, and no longer explains the electrical control.

[0022] Example

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings. Figure 1-3As shown, a pair of the copper wires 3, a pair of the iron wires 4 and a pair of the nickel-chromium wires 5 are installed on the bottom plate 1 through the fixed support block 2, and an adjustment detection structure is installed on the bottom plate 1; the adjustment detection structure includes: three pairs of clamping blocks 6, three pairs of horizontal threaded rods 7, three pairs of horizontal threaded tubes 8, three pairs of horizontal convex sliders 9, three pairs of horizontal handles 10, three pairs of concave lifting limit blocks 11, three pairs of convex lifting limit blocks 12, a plurality of lifting limit shafts 13, a plurality of lifting set springs 14, three pairs of ball arc metal sheets 15, three pairs of contact metal balls 16 and six pairs of drainage cables 17; on the bottom plate There are three pairs of horizontal cross-shaped expansion slots, three pairs of clamping blocks 6 are evenly installed on the bottom plate 1, three pairs of horizontal convex sliders 9 are movably inserted into the inner sides of the three pairs of horizontal cross-shaped expansion slots, three pairs of horizontal threaded rods 7 are respectively inserted into the inner sides of the three pairs of horizontal cross-shaped expansion slots through bearings, three pairs of horizontal threaded tubes 8 are respectively inserted into the three pairs of horizontal convex sliders 9, and the three pairs of horizontal threaded tubes 8 are respectively movably sleeved on the three pairs of horizontal threaded rods 7, three pairs of horizontal handles 10 are respectively installed on the three pairs of horizontal threaded rods 7, and three pairs of concave lifting limit blocks 11 are respectively installed on the three pairs of horizontal threaded rods 7. The three pairs of convex lifting limit blocks 12 are respectively installed on the three pairs of horizontal convex sliders 9, the three pairs of convex lifting limit blocks 12 are respectively movably inserted on the inner sides of the three pairs of concave lifting limit blocks 11, and the plurality of lifting limit shafts 13 are respectively inserted on the three pairs of concave lifting limit blocks 11, and the plurality of lifting limit shafts 13 are respectively movably inserted on the three pairs of convex lifting limit blocks 12, and the plurality of lifting sleeve springs 14 are respectively sleeved on the plurality of lifting limit shafts 13, and the three pairs of ball arc metal sheets 15 are respectively inserted on the three pairs of convex lifting limit blocks 12, and the three pairs of metal balls are respectively movably placed on the three pairs of On the inner side of the spherical arc metal sheet 15, six pairs of drainage cables 17 are respectively inserted into three pairs of the clamping blocks 6 and three pairs of the spherical arc metal sheets 15; a number of scales are arranged on the base plate 1; a pair of the copper wires 3, a pair of the iron wires 4 and a pair of the nickel-chromium are respectively provided with different fuels; the diameters of the pair of the copper wires 3, the pair of the iron wires 4 and the pair of the nickel-chromium are 3mm and 5mm respectively; a number of the fixed support blocks 2 are respectively provided with tightness sensors; a number of the fixed support blocks 2, the base plate 1 and the three pairs of the concave lifting limit blocks 11 are all made of PVC material.

[0024] According to the attached Figure 1-3It is concluded that by rotating the horizontal handle 10, the horizontal threaded rod 7 on the horizontal handle 10 is driven to rotate, and the horizontal threaded tube 8 on the outside is driven by the horizontal threaded rod 7, so that the horizontal threaded tube 8 moves stably horizontally along the horizontal threaded rod 7, and the horizontal convex slider 9 on it is driven by the horizontal threaded tube 8, so that the horizontal convex slider 9 can stably horizontally telescope in the cross-shaped telescopic groove on the bottom plate 1, and the concave lifting limit block 11 on it is driven by the horizontal convex slider 9, so that the concave lifting limit block 11 can stably horizontally telescope on the inner side of the cross-shaped telescopic groove, thereby changing the position of the convex lifting limit block 12 inside the concave lifting limit block 11, and The convex lifting limit block 12 drives the ball arc metal sheet 15 and the contact metal ball 16 thereon, and the contact positions of the three pairs of contact metal balls 16 with a pair of copper wires 3, a pair of iron wires 4 and a pair of nickel-chromium wires 5 are changed to adjust, so as to change the length of the metal wire between the contact metal ball 16 and the clamping block 6 for adjustment, and the several lifting set springs 14 on the inner side of the concave lifting limit block 11 are lifted and lowered along the several lifting limit shafts 13 respectively, and the convex lifting limit block 12 is elastically pushed by the several lifting set springs 14, so as to squeeze the contact metal balls 16 on the convex lifting limit block 12 to make close contact with the metal wires.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Resistance law demonstrator, including: A bottom plate, a plurality of fixed support blocks, a pair of copper wires, a pair of iron wires and a pair of nickel-chromium wires, wherein the pair of copper wires, the pair of iron wires and the pair of nickel-chromium wires are mounted on the bottom plate through the fixed support blocks, and an adjustment detection structure is mounted on the bottom plate; The adjustment and detection structure comprises: three pairs of clamping blocks, three pairs of horizontal threaded rods, three pairs of horizontal threaded tubes, three pairs of horizontal convex sliders, three pairs of horizontal handles, three pairs of concave lifting limit blocks, three pairs of convex lifting limit blocks, a plurality of lifting limit shafts, a plurality of lifting set springs, three pairs of ball arc metal sheets, three pairs of contact metal balls and six pairs of drainage cables; Three pairs of horizontal cross-shaped expansion slots are provided on the bottom plate, three pairs of clamping blocks are evenly installed on the bottom plate, three pairs of horizontal convex sliders are movably inserted into the inner sides of the three pairs of horizontal cross-shaped expansion slots, three pairs of horizontal threaded rods are respectively inserted into the inner sides of the three pairs of horizontal cross-shaped expansion slots through bearings, three pairs of horizontal threaded tubes are respectively inserted into the three pairs of horizontal convex sliders, and the three pairs of horizontal threaded tubes are respectively movably sleeved on the three pairs of horizontal threaded rods, three pairs of horizontal handles are respectively installed on the three pairs of horizontal threaded rods, and three pairs of concave lifting limit blocks are respectively installed on the three pairs of horizontal convex sliders On, the three pairs of convex lifting limit blocks are respectively movably inserted on the inner sides of the three pairs of concave lifting limit blocks, a number of lifting limit shafts are respectively inserted on the three pairs of concave lifting limit blocks, and a number of lifting limit shafts are respectively movably inserted on the three pairs of convex lifting limit blocks, a number of lifting sleeve springs are respectively sleeved on a number of lifting limit shafts, three pairs of spherical arc metal sheets are respectively inserted on the three pairs of convex lifting limit blocks, three pairs of metal balls are respectively movably arranged on the inner sides of the three pairs of spherical arc metal sheets, and six pairs of drainage cables are respectively inserted on the three pairs of clamping blocks and the three pairs of spherical arc metal sheets.

2. The resistance law demonstrator according to claim 1, characterized in that: A plurality of scales are arranged on the bottom plate.

3. The resistance law demonstrator according to claim 2, characterized in that: Different fuels are respectively arranged on the pair of copper wires, the pair of iron wires and the pair of nickel-chromium wires.

4. The resistance law demonstrator according to claim 3, characterized in that: The diameters of the pair of copper wires, the pair of iron wires, and the pair of nickel-chromium wires are 3 mm and 5 mm respectively.

5. The resistance law demonstrator according to claim 4, characterized in that: A plurality of the fixed support blocks are respectively provided with tightness sensors.

6. The resistance law demonstrator according to claim 5, characterized in that: The plurality of fixed support blocks, the bottom plate and the three pairs of concave lifting limit blocks are all made of PVC material.

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