Thermistor teaching display device
By designing an operable thermistor teaching demonstration device, which utilizes manually operated electric heating fans and changes in the brightness of the light wall, the problem of insufficient interactivity and fun in traditional teaching is solved, achieving more efficient teaching results and improving the safety and portability of the device.
Patent Information
- Application Number
- CN202520394389.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-07
AI Technical Summary
Existing teaching and demonstration methods for thermistors are fixed and monotonous, allowing students to only passively observe, lacking interactivity and interest, and affecting teaching efficiency.
A thermistor teaching demonstration device was designed, comprising an inverted T-shaped slide bar, a return spring, a support rod, and a guide groove. By manually operating an electric heating fan to blow air onto the positive and negative temperature coefficient thermistor light wall, the resistance value changes with temperature in combination with the brightness change of the light wall. It is equipped with a display screen controller to monitor and display temperature and light intensity in real time. A high-temperature power-off element and an anti-glare glass cover are set to improve safety. The base design is easy to fold and carry.
The device's interactivity and fun have been increased, teaching efficiency has been improved, students' participation and perception have been enhanced, and the device's safety and portability have been improved.
Smart Images
Figure CN223871136U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of thermistor teaching demonstration technology, and in particular to thermistor teaching demonstration device. Background Technology
[0002] Thermistors, as important temperature sensors, are widely used in industrial control, home appliances, medical equipment, and other fields. Their resistance changes significantly with temperature, making them a key component for temperature measurement and control. In electronics education, the working principle and applications of thermistors are important teaching content. However, traditional teaching methods often limit themselves to theoretical explanations and simple experimental demonstrations, failing to intuitively and vividly demonstrate the characteristics of thermistors, resulting in students' limited understanding and low learning interest.
[0003] Currently, teaching demonstrations of thermistors typically use high-temperature blowing to heat both positive temperature coefficient (PTC) and negative temperature coefficient (NTC) thermistors, and the change in resistance value with temperature is shown by the brightness change of an LED. Specifically, when an NTC thermistor is heated, its resistance value decreases and the LED light brightens; while when a PTC thermistor is heated, its resistance value increases and the LED light dims.
[0004] However, while existing teaching demonstrations of thermistors can showcase the basic characteristics of thermistors, the fixed experimental setups and monotonous operations mean that students can only passively observe and cannot actively participate in the experimental process. This lack of interactivity and interest affects teaching efficiency. Utility Model Content
[0005] The purpose of this application is to address the problem that while existing teaching demonstration methods for thermistors can demonstrate the basic characteristics of thermistors, the experimental equipment is fixed and the operation is monotonous, which means that students can only passively observe and cannot actively participate in the experimental process, lacking interactivity and interest, thus affecting teaching efficiency. This application provides a thermistor teaching demonstration device.
[0006] To achieve the above objectives, this application specifically adopts the following technical solution:
[0007] A thermistor teaching demonstration device includes symmetrically hinged bases. A positive temperature coefficient thermistor lamp wall is fixedly connected to the top of one base, and a negative temperature coefficient thermistor lamp wall is fixedly connected to the top of the other base. One end of each base has a guide groove, and a support rod is slidably connected inside the guide groove. One end of the support rod has a lifting groove, and an inverted T-shaped slide rod is slidably connected inside the lifting groove. A return spring is fitted onto one end of the inverted T-shaped slide rod, and the return spring is installed between the inverted T-shaped slide rod and the support rod. The top end of the inverted T-shaped slide rod passes through the support rod and is fixedly connected to an electric heating fan.
[0008] By adopting the above technical solution, and through the coordinated use of the inverted T-shaped sliding rod, return spring, support rod, and guide slide, people can hold the operating end of the electric hot air blower and change the operating height along the length of the lifting slide, and slide it along the length of the guide slide. This allows the operator to drive two electric hot air blowers to blow hot air onto the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall respectively. The changes in resistance value of the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall in response to temperature changes are used, along with the changes in brightness of the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall, to demonstrate the change in resistance value with temperature. This increases the interactivity and interest of the device and improves teaching efficiency.
[0009] Furthermore, a temperature sensor is fixedly connected to the output end of the electric hot air blower, and a light intensity sensor is fixedly connected to the output end of the electric hot air blower. A display controller is fixedly connected to the top of the electric hot air blower, and the display controller is electrically connected to the temperature sensor and the light intensity sensor.
[0010] By adopting the above technical solution, and by setting up the display controller in conjunction with the light intensity sensor and the temperature sensor, the display controller can monitor the output temperature of the electric heating fan and the light intensity of the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall in real time through the temperature sensor and the light intensity sensor, and display the monitored values to the operator, which effectively improves the practicality of the device.
[0011] Furthermore, the display controller is internally equipped with a high-temperature power-off component to prevent the electric heating fan from overheating.
[0012] By adopting the above technical solution and setting up high-temperature power-off components, the safety of the device is effectively improved.
[0013] Furthermore, an anti-glare glass cover is fixedly connected to the output end of the electric heating fan.
[0014] By adopting the above technical solution, and by using an anti-glare glass cover in conjunction with an electric hot air blower, the light shining on the operator from the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall can be easily blocked by the anti-glare glass cover, thereby reducing the damage of light to the user's eyes and further improving the safety of the device.
[0015] Furthermore, one end of the support rod is provided with a support through hole, and a support slide rod is inserted into the support through hole, and the support slide rod is fixedly connected to the base.
[0016] By adopting the above technical solution and using the combination of support perforations and support slide bars, the movement stability of the support rod is effectively improved.
[0017] Furthermore, one end of both the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall is fixedly connected to an L-shaped guide rail, and one end of the L-shaped guide rail is slidably fitted with a light-shielding curtain. Both the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall are installed inside the light-shielding curtain.
[0018] By adopting the above technical solution, and by using the L-shaped guide rail in conjunction with the light-blocking curtain, it is convenient to use the light-blocking curtain to wrap around the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall, effectively reducing the influence of external light on the light intensity changes of the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall.
[0019] Furthermore, a protrusion is fixedly connected to one end of the negative temperature coefficient thermistor lamp wall, and a slot is opened at one end of the protrusion. A storage groove is opened at one end of the positive temperature coefficient thermistor lamp wall. A snap-fit slider is slidably connected inside the storage groove. A contact spring is fixedly connected to one end of the snap-fit slider. The contact spring is installed inside the storage groove, and one end of the snap-fit slider is embedded inside the slot.
[0020] By adopting the above technical solution, and through the coordinated use of the contact spring, the locking slider, and the locking slot, when the base is rotated around the hinge axis and the locking slot is aligned with the locking slider, the rebound characteristic of the contact spring pushes one end of the locking slider into the inside of the locking slot, thereby forming a locking and fixing between the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall. This facilitates the folding and storage of the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall, effectively improving the portability of the device.
[0021] Furthermore, each of the four bottom corners of the base is fixedly connected with a caster wheel.
[0022] By adopting the above technical solution and using the omnidirectional wheels in conjunction with the base, a rolling contact is formed between the base and the ground, further improving the portability of the device.
[0023] In summary, this application includes at least one of the following beneficial effects:
[0024] 1. By using an inverted T-shaped sliding rod in conjunction with a return spring, support rod, and guide chute, users can hold the operating end of the electric hot air blower and change the operating height along the length of the lifting chute. The operator can then slide the blower along the guide chute, allowing the two electric hot air blowers to the positive and negative temperature coefficient thermistor lamp walls respectively. The changes in resistance of the positive and negative temperature coefficient thermistor lamp walls in response to temperature changes, along with their brightness variations, demonstrate how resistance changes with temperature. This increases the interactivity and interest of the device and improves teaching efficiency.
[0025] 2. By using a combination of a contact spring, a snap-fit slider, and a snap-fit slot, when the base is rotated around the hinge axis and the snap-fit slider is aligned with the snap-fit slot, the rebound characteristic of the contact spring pushes one end of the snap-fit slider into the slot, thereby locking the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall together. This facilitates the folding and storage of the positive temperature coefficient thermistor lamp wall and the negative temperature coefficient thermistor lamp wall, effectively improving the portability of the device. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the unfolded three-dimensional structure of the main body of the device in this application.
[0027] Figure 2 This is an exploded view of the internal structure of the lifting chute in this application.
[0028] Figure 3 This is an exploded view of the internal structure of the storage compartment in this application.
[0029] Figure 4 This is a schematic diagram of the three-dimensional structure of the back of the main body of the device in this application.
[0030] Figure 5 This is a frontal folded three-dimensional structural diagram of the main body of the device in this application.
[0031] Explanation of reference numerals in the attached figures:
[0032] 1. Base; 2. Positive temperature coefficient thermistor lamp wall; 3. Negative temperature coefficient thermistor lamp wall; 4. Guide slide; 5. Support rod; 6. Lifting slide; 7. Inverted T-shaped slide rod; 8. Return spring; 9. Electric heating fan; 10. Temperature sensor; 11. Light intensity sensor; 12. Display controller; 13. Anti-glare glass cover; 14. Support perforation; 15. Support slide rod; 16. L-shaped guide rail; 17. Blackout curtain; 18. Protrusion; 19. Slot; 20. Storage slot; 21. Snap-fit slider; 22. Abutment spring; 23. Casters. Detailed Implementation
[0033] The following is in conjunction with the appendix Figure 1 —5 provides further details regarding this application.
[0034] This application discloses a thermistor teaching and demonstration device.
[0035] Reference Figure 1 - Figure 3 The thermistor teaching demonstration device includes symmetrically hinged bases 1. A positive temperature coefficient thermistor lamp wall 2 is fixedly connected to the top of one base 1, and a negative temperature coefficient thermistor lamp wall 3 is fixedly connected to the top of the other base 1. A guide groove 4 is opened at one end of the base 1. A support rod 5 is slidably connected inside the guide groove 4. A lifting groove 6 is opened at one end of the support rod 5. An inverted T-shaped slide rod 7 is slidably connected inside the lifting groove 6. A return spring 8 is sleeved at one end of the inverted T-shaped slide rod 7. The return spring 8 is installed between the inverted T-shaped slide rod 7 and the support rod 5. The top of the inverted T-shaped slide rod 7 passes through the support rod 5 and is fixedly connected to an electric hot air blower 9.
[0036] Among them, the output end of the electric hot air blower 9 is fixedly connected to a temperature sensor 10, and the output end of the electric hot air blower 9 is fixedly connected to a light intensity sensor 11. The top of the electric hot air blower 9 is fixedly connected to a display controller 12, and the display controller 12 is electrically connected to the temperature sensor 10 and the light intensity sensor 11.
[0037] Furthermore, the display controller 12 is equipped with a high-temperature power-off component to prevent the electric hot air blower 9 from overheating.
[0038] Furthermore, the output end of the electric hot air blower 9 is fixedly connected to an anti-glare glass cover 13;
[0039] Furthermore, a support through hole 14 is provided at one end of the support rod 5, and a support slide rod 15 is inserted into the support through hole 14. The support slide rod 15 is fixedly connected to the base 1.
[0040] When in use, first guide the user to hold the operating end of the electric hot air blower 9, and pull the electric hot air blower 9 to drive the inverted T-shaped slide bar 7 to squeeze the return spring 8 along the length direction of the lifting slide groove 6, so that the return spring 8 will be compressed and deformed. At the same time, the electric hot air blower 9 will change the operating height according to the height of the user. Simultaneously, pull the electric hot air blower 9 to drive the inverted T-shaped slide bar 7 to push the support rod 5 to slide along the length direction of the guide slide groove 4, so that the operator can pull the electric hot air blower 9 to move along the length direction of the support slide bar 15. The operator can manually turn on the two electric hot air blowers 9 to blow hot air onto the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3 respectively. At the same time, turn on the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3, so that the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3 emit light while being blown by the hot air blower 9.
[0041] Simultaneously, by utilizing the resistance changes of the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3 in response to temperature changes, the electric hot air blower 9 causes the resistance of the negative temperature coefficient thermistor lamp wall 3 to decrease, making the LED light brighter; while when it heats the positive temperature coefficient thermistor lamp wall 2, its resistance increases, making the LED light dimmer. This allows operators to personally experience the brightness changes of the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3 under the same heating conditions, increasing the interactivity and fun of the device and improving teaching efficiency.
[0042] Furthermore, while the electric heating fan 9 is started, a temperature sensor 10 and a light intensity sensor 11 are set up to monitor the output temperature of the electric heating fan 9 and the light intensity changes of the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3, respectively. The monitoring results of the temperature sensor 10 and the light intensity sensor 11 are displayed to the operator through the display screen controller 12, which further improves the operator's perception. A high temperature power-off element is set up so that when the temperature is higher than the set value, the electric heating fan 9 will automatically stop heating through the display screen controller 12 to avoid the operator being burned by excessive temperature. At the same time, an anti-glare glass cover 13 is set up to intercept and protect the light emitted by the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3, so as to reduce the impact of the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3 on the operator's vision and improve the safety of the device.
[0043] Reference Figure 1 and Figure 4 Both the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3 are fixedly connected to one end of an L-shaped guide rail 16. A light-blocking curtain 17 is slidably fitted onto one end of the L-shaped guide rail 16. Both the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3 are installed inside the light-blocking curtain 17.
[0044] When the user is guided to approach the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3 for experience, the light-blocking curtain 17 is manually pulled along the L-shaped guide rail 16 to wrap around the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3. This reduces the influence of external light on the light changes of the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3, and improves the user experience of the device.
[0045] Reference Figure 3 - Figure 5 One end of the negative temperature coefficient thermistor lamp wall 3 is fixedly connected to a protrusion 18, and one end of the protrusion 18 is provided with a slot 19. One end of the positive temperature coefficient thermistor lamp wall 2 is provided with a storage slot 20. A snap-fit slider 21 is slidably connected inside the storage slot 20. One end of the snap-fit slider 21 is fixedly connected to a contact spring 22, which is installed inside the storage slot 20. One end of the snap-fit slider 21 is embedded inside the slot 19.
[0046] Among them, the four corners of the bottom of the base 1 are all fixedly connected with casters 23.
[0047] In use, by manually pushing the base 1 to rotate around the hinge axis, the universal wheel 23 rolls along the ground. At the same time, the negative temperature coefficient thermistor lamp wall 3 causes the protrusion 18 to come into contact with the locking slider 21, and pushes the locking slider 21 to compress the contact spring 22 to produce a contraction deformation. Simultaneously, the protrusion 18 causes the locking groove 19 to align with the locking slider 21. Then, using the rebound characteristic of the contact spring 22, the contact spring 22 pushes one end of the locking slider 21 through the storage groove 20 and into the inside of the locking groove 19. This makes the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3 locked together, which facilitates the folding and storage of the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3, effectively improving the portability of the device.
[0048] The implementation principle of the thermistor teaching demonstration device in this embodiment is as follows: First, guide people to hold the operating end of the electric hot air blower 9, and pull the electric hot air blower 9 to drive the inverted T-shaped slide bar 7 to squeeze the return spring 8 along the length direction of the lifting slide groove 6, so that the return spring 8 will be compressed and deformed. At the same time, the electric hot air blower 9 changes the operating height according to the height of the person holding it. Simultaneously, the electric hot air blower 9 is pulled to drive the inverted T-shaped slide bar 7 to push the support rod 5 to slide along the length direction of the guide slide groove 4, so that the operator can pull the electric hot air blower 9 to move along the length direction of the support slide bar 15. The operator can manually turn on the two electric hot air blowers 9 to blow hot air onto the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3 respectively. At the same time, the resistance value of the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3 changes with temperature. When the electric hot air blower 9 heats the negative temperature coefficient thermistor lamp wall 3, its resistance value decreases and the LED light brightens; while when it heats the positive temperature coefficient thermistor lamp wall 2, its resistance value increases and the LED light dims.
[0049] Simultaneously, while the electric heating fan 9 is started, a temperature sensor 10 and a light intensity sensor 11 are set to monitor the output temperature of the electric heating fan 9 and the light intensity changes of the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3, respectively. The monitoring results of the temperature sensor 10 and the light intensity sensor 11 are displayed to the operator through the display screen controller 12 to improve the operator's perception. A high temperature power-off element is set so that when the temperature is higher than the set value, the electric heating fan 9 will automatically stop heating through the display screen controller 12.
[0050] Then, by manually pushing the base 1 to rotate around the hinge axis, the universal wheel 23 is driven to roll along the ground. At the same time, the negative temperature coefficient thermistor lamp wall 3 causes the protrusion 18 to come into contact with the locking slider 21, and pushes the locking slider 21 to compress the contact spring 22 to produce a contraction deformation. At the same time, the protrusion 18 causes the locking groove 19 to align with the locking slider 21. Then, using the rebound characteristic of the contact spring 22, the contact spring 22 pushes one end of the locking slider 21 through the storage groove 20 and into the inside of the locking groove 19, thereby making the positive temperature coefficient thermistor lamp wall 2 and the negative temperature coefficient thermistor lamp wall 3 locked together.
Claims
1. A thermistor teaching demonstration device, comprising a symmetrically hinged base (1), characterized in that: A positive temperature coefficient thermistor lamp wall (2) is fixedly connected to the top of one of the bases (1), and a negative temperature coefficient thermistor lamp wall (3) is fixedly connected to the top of the other base (1). A guide groove (4) is provided at one end of the base (1). A support rod (5) is slidably connected inside the guide groove (4). A lifting groove (6) is provided at one end of the support rod (5). An inverted T-shaped slide rod (7) is slidably connected inside the lifting groove (6). A return spring (8) is sleeved on one end of the inverted T-shaped slide rod (7). The return spring (8) is installed between the inverted T-shaped slide rod (7) and the support rod (5). The top end of the inverted T-shaped slide rod (7) passes through the support rod (5) and is fixedly connected to an electric heating fan (9).
2. The thermistor teaching demonstration device according to claim 1, characterized in that: A temperature sensor (10) is fixedly connected to the output end of the electric hot air blower (9), and a light intensity sensor (11) is fixedly connected to the output end of the electric hot air blower (9). A display controller (12) is fixedly connected to the top of the electric hot air blower (9), and the display controller (12) is electrically connected to the temperature sensor (10) and the light intensity sensor (11).
3. The thermistor teaching demonstration device according to claim 2, characterized in that: The display controller (12) is equipped with a high-temperature power-off element to prevent the electric hot air blower (9) from overheating.
4. The thermistor teaching demonstration device according to claim 1, characterized in that: The output end of the electric hot air blower (9) is fixedly connected to an anti-glare glass cover (13).
5. The thermistor teaching demonstration device according to claim 1, characterized in that: One end of the support rod (5) is provided with a support through hole (14), and a support slide rod (15) is inserted inside the support through hole (14). The support slide rod (15) is fixedly connected to the base (1).
6. The thermistor teaching demonstration device according to claim 1, characterized in that: One end of the positive temperature coefficient thermistor lamp wall (2) and the negative temperature coefficient thermistor lamp wall (3) are fixedly connected to an L-shaped guide rail (16). One end of the L-shaped guide rail (16) is slidably fitted with a light-blocking curtain (17). The positive temperature coefficient thermistor lamp wall (2) and the negative temperature coefficient thermistor lamp wall (3) are both installed inside the light-blocking curtain (17).
7. The thermistor teaching demonstration device according to claim 1, characterized in that: One end of the negative temperature coefficient thermistor lamp wall (3) is fixedly connected to a protrusion (18), and one end of the protrusion (18) is provided with a slot (19). One end of the positive temperature coefficient thermistor lamp wall (2) is provided with a storage slot (20). A snap-fit slider (21) is slidably connected inside the storage slot (20). One end of the snap-fit slider (21) is fixedly connected to a resisting spring (22). The resisting spring (22) is installed inside the storage slot (20). One end of the snap-fit slider (21) is embedded inside the slot (19).
8. The thermistor teaching demonstration device according to claim 1, characterized in that: The base (1) is fixedly connected to four corners of the bottom with casters (23).