A thermistor detection device

Abstract

The utility model discloses a thermistor detection device, which belongs to the field of thermistor detection technology. A thermistor detection device includes a workbench, and also includes: a detection probe connected to the workbench by lifting, a detection box fixedly connected to the workbench, a resistor body is arranged in the detection box, and the detection end of the detection probe can fit with the resistor body pin; a mounting box fixedly connected to the workbench, a limit plate slidably connected to the mounting box, when the detection probe moves toward the resistor body; the utility model can limit the outer wall of the resistor body, thereby ensuring that the position of the resistor body is fixed, maintaining stability, preventing unnecessary vibration or displacement during the detection process, improving the stability of the detection probe and the resistor body pin when they are in contact, improving the accuracy of the detection resistance, ensuring accurate measurement during resistance value detection and other operations, and avoiding errors caused by position offset.

Description

Technical Field

[0001] The utility model relates to the technical field of thermistor detection, in particular to a thermistor detection device. Background Art

[0002] A thermistor is a resistor whose resistance value is extremely sensitive to temperature. It is also called a semiconductor thermistor. It can be made of single crystal, polycrystalline, glass, plastic and other semiconductor materials. This resistor has a series of special electrical properties. The most basic characteristic is that its resistance value changes significantly with temperature, and the volt-ampere curve is nonlinear. During the production and processing of thermistors, in order to ensure the normal use of thermistors, the thermistors need to be tested after production to test whether the thermistors can be used normally. The conventional detection method usually holds two test pens on the resistor pins to detect its resistance value, and at the same time increases the temperature by holding the resistor to check the change in the resistance value of the resistor.

[0003] The working principle of thermistor is to adjust temperature, voltage, time delay and circuit protection through sensors. Thermistor is a sensing resistor that changes with temperature. According to the difference in temperature coefficient, it can be divided into positive and negative temperature coefficient thermistor types. As the temperature increases, the resistance value of the positive temperature coefficient thermistor gradually increases, and as the temperature increases, the resistance value of the negative temperature coefficient thermistor also decreases.

[0004] After searching, the Chinese patent publication number CN220982503U discloses a thermistor detection device, including a fixed plate, a slide groove is opened on the top of the fixed plate, and a movable box is movably arranged inside the slide groove, a resistor body is clamped inside the movable box, and a conductive card block is extruded on the outside of the pin of the resistor body, a detection probe is welded on the top of the conductive card block, and a pen holder is fixedly installed on the top of the detection probe.

[0005] During use, it was found that when testing the thermistor, since the detection probe needs to be in contact with the resistor pin, and the thermistor cannot be fixed in the above device, the detection probe and the resistor pin are unstable when in contact, thereby reducing the accuracy of the detection resistance value. Utility Model Content

[0006] The utility model aims to solve the problem that the thermistor cannot be fixed in the prior art, resulting in instability when the detection probe and the resistor pin are in contact, thereby reducing the accuracy of the detection resistance value, and proposes a thermistor detection device.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A thermistor detection device includes a workbench, and also includes: a detection probe connected to the workbench in a lifting manner, wherein a detection box is fixedly connected to the workbench, a resistor body is arranged in the detection box, and the detection end of the detection probe can be fitted with the pin of the resistor body; an installation box fixedly connected to the workbench, wherein a limit plate is slidably connected to the installation box, and when the detection probe moves toward the resistor body, the limit plate can extend into the detection box and abut against the outer wall of the resistor body; a driving part, used to drive the detection probe to move.

[0009] In order to facilitate the movement of the limiting plate, preferably, a guide cylinder is fixedly connected to the installation box, a guide rod is slidably connected to the guide cylinder, and the limiting plate is fixedly connected to the guide rod.

[0010] In order to facilitate the movement of the guide rod, further, a placement cavity is opened in the installation box, an airbag is arranged in the placement cavity, and the airbag is in contact with the inner wall of the placement cavity, a booster rod is slidably connected to the installation box, one end of the booster rod extends into the placement cavity and is fixedly connected to a pressure plate, the pressure plate is against the outer wall of the airbag, a piston is arranged on the end of the guide rod away from the limit plate, and the piston is in contact with the inner wall of the guide cylinder, a spring is arranged in the guide cylinder, and the two ends of the spring are respectively against the piston and the inner wall of the guide cylinder, and the airbag is connected to the guide cylinder.

[0011] In order to facilitate the movement of the detection probe, preferably, the workbench is fixedly connected to a support frame, the support frame is fixedly connected to an electric telescopic rod, the output end of the electric telescopic rod is fixedly connected to a connecting plate, the detection probe is fixedly connected to the connecting plate, and the connecting plate cooperates with the boosting rod.

[0012] In order to improve the limiting effect of the limiting plate, preferably, a buffer pad is provided at the end of the limiting plate.

[0013] In order to facilitate the detection of the resistor body after placement, further, a placement plate is detachably connected to the inside of the detection box, and the resistor body is arranged on the placement plate.

[0014] In order to facilitate the protection of the detection probe, preferably, a protective cover is fixedly connected to the workbench, and the support frame is arranged inside the protective cover.

[0015] Compared with the prior art, the utility model provides a thermistor detection device, which has the following beneficial effects:

[0016] 1. The thermistor detection device drives the buffer pad to move toward the outer wall of the resistor body through the limit plate, and limits the outer wall of the resistor body, thereby ensuring that the position of the resistor body is fixed, maintaining stability, preventing unnecessary vibration or displacement during the detection process, improving the stability of the detection probe and the resistor body pin when they are in contact, improving the accuracy of the detection resistance value, ensuring accurate measurement during resistance value detection and other operations, and avoiding errors caused by position offset;

[0017] 2. The thermistor detection device can achieve smooth stop when the limit plate moves to the outer wall of the resistor body by arranging a buffer pad, thereby avoiding impact or vibration caused by sudden stop and improving the stability of the resistor body.

[0018] The parts not involved in the device are the same as the prior art or can be implemented by the prior art. The utility model can limit the outer wall of the resistor body, thereby ensuring that the position of the resistor body is fixed and maintains stability, preventing unnecessary vibration or displacement during the detection process, improving the stability of the detection probe and the resistor body pin when they are in contact, improving the accuracy of the detected resistance value, ensuring accurate measurement during operations such as resistance value detection, and avoiding errors caused by position offset. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional structural diagram of a thermistor detection device proposed by the utility model;

[0020] Figure 2 A schematic diagram of the cutaway structure of a thermistor detection device proposed by the utility model;

[0021] Figure 3 A partial structural diagram of a thermistor detection device proposed by the utility model Figure 1 ;

[0022] Figure 4 A partial structural diagram of a thermistor detection device proposed by the utility model Figure 2 .

[0023] In the figure: 1. workbench; 101. protective cover; 102. support frame; 2. detection box; 201. placement plate; 3. resistor body; 4. installation box; 5. booster rod; 501. pressure plate; 6. airbag; 7. guide cylinder; 701. guide rod; 702. spring; 8. limit plate; 801. buffer pad; 9. electric telescopic rod; 901. connecting plate; 10. detection probe. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] Example:

[0027] Reference Figure 1-Figure 4 A thermistor detection device includes a workbench 1, a protective cover 101 is fixedly connected to the workbench 1, a support frame 102 is fixedly connected to the workbench 1, and an electric telescopic rod 9 is fixedly connected to the support frame 102, and the output end of the electric telescopic rod 9 is fixedly connected to a connecting plate 901, and then a detection probe 10 is fixedly connected to the connecting plate 901, and a display screen can be set on the workbench 1 for more intuitively displaying the resistance value after detection. This is a prior art and will not be described in detail here.

[0028] Furthermore, by starting the switch of the electric telescopic rod 9, the connecting plate 901 can be driven to rise or fall, so that the detection probe 10 can be moved up and down, so that the detection end of the detection probe 10 can fit with the pin of the resistor body 3, and the resistance value of the resistor body 3 can be detected.

[0029] A detection box 2 is fixedly connected to the workbench 1, a through hole is opened on the side wall of the detection box 2, and a placement plate 201 is detachably connected to the detection box 2, a plurality of groups of equidistant spacers are arranged on the placement plate 201, and the resistor body 3 is arranged between adjacent spacers, and the pins on the resistor body 3 are aligned with the detection end of the detection probe 10.

[0030] In addition, the workbench 1 is fixedly connected to the installation box 4, the installation box 4 is fixedly connected to the guide cylinder 7, and the guide cylinder 7 is slidably connected to the guide rod 701, and the limit plate 8 is fixedly connected to the guide rod 701, and the end of the limit plate 8 is provided with a buffer pad 801. By providing the buffer pad 801, the limit plate 8 can achieve a smooth stop when moving to the outer wall of the resistor body 3, avoiding the impact or vibration caused by the sudden stop, and improving the stability of the resistor body 3.

[0031] A placement cavity is opened in the installation box 4, and an airbag 6 is arranged in the placement cavity, and the airbag 6 is in contact with the inner wall of the placement cavity. A booster rod 5 is slidably connected to the installation box 4, and one end of the booster rod 5 extends into the placement cavity and is fixedly connected to a pressure plate 501, and the pressure plate 501 is against the outer wall of the airbag 6. A piston is arranged on the end of the guide rod 701 away from the limit plate 8, and the piston is in contact with the inner wall of the guide cylinder 7. A spring 702 is arranged in the guide cylinder 7, and the two ends of the spring 702 are respectively against the piston and the inner wall of the guide cylinder 7, and the airbag 6 is connected to the guide cylinder 7.

[0032] The working principle is as follows: when the resistance value of the resistor body 3 needs to be detected, the switch of the electric telescopic rod 9 is started, and the electric telescopic rod 9 will drive the connecting plate 901 to move downward, and then the connecting plate 901 will drive the detection probe 10 to move toward the pin direction of the resistor body 3. During this process, the connecting plate 901 will press the booster rod 5, so that the gas in the airbag 6 can be transported to the guide tube 7. At this time, the spring 702 in the guide tube 7 is stretched, and the guide rod 701 will drive the limit plate 8 to move toward the through hole on the detection box 2. At this time, the limit plate 8 drives the buffer pad 801 to move toward the outer wall of the resistor body 3.

[0033] When the buffer pad 801 moves toward the outer wall of the resistor body 3, the outer wall of the resistor body 3 can be limited, thereby ensuring that the position of the resistor body 3 is fixed and stable, preventing unnecessary vibration or displacement during the detection process, improving the stability of the detection probe 10 and the pins of the resistor body 3 when they are in contact, improving the accuracy of the detected resistance value, ensuring accurate measurement during operations such as resistance value detection, and avoiding errors caused by position offset.

[0034] When the detection is completed, the electric telescopic rod 9 drives the connecting plate 901 to move upward. At this time, the detection probe 10 at the bottom of the connecting plate 901 will be reset, and the connecting plate 901 will be moved away from the top of the booster rod 5. At this time, the spring 702 rebounds and re-transports the gas in the guide cylinder 7 to the airbag 6. At this time, the booster rod 5 will be affected by the pressure plate 501 and move upward. At this time, the limit plate 8 is moved out of the detection box 2. At this time, the limit plate 8 cannot extend into the detection box 2 and abut against the outer wall of the resistor body 3.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A thermistor detection device, comprising a workbench (1), characterized in that: Also includes: A detection probe (10) connected to the workbench (1) is lifted and lowered, The workbench (1) is fixedly connected with a detection box (2), a resistor body (3) is arranged in the detection box (2), and the detection end of the detection probe (10) can be fitted with a pin of the resistor body (3); a mounting box (4) fixedly connected to the workbench (1), The installation box (4) is slidably connected to a limit plate (8), and when the detection probe (10) moves toward the resistor body (3), the limit plate (8) can extend into the detection box (2) and abut against the outer wall of the resistor body (3); The driving part is used for driving the detection probe (10) to move.

2. A thermistor detection device according to claim 1, characterized in that: The installation box (4) is fixedly connected with a guide cylinder (7), the guide cylinder (7) is slidably connected with a guide rod (701), and the limit plate (8) is fixedly connected to the guide rod (701).

3. A thermistor detection device according to claim 2, characterized in that: A placement cavity is provided in the installation box (4), an airbag (6) is provided in the placement cavity, and the airbag (6) is in contact with the inner wall of the placement cavity. A booster rod (5) is slidably connected to the installation box (4), one end of the booster rod (5) extends into the placement cavity and is fixedly connected to a pressure plate (501), the pressure plate (501) is in contact with the outer wall of the airbag (6), a piston is provided at one end of the guide rod (701) away from the limit plate (8), and the piston is in contact with the inner wall of the guide cylinder (7), a spring (702) is provided in the guide cylinder (7), and the two ends of the spring (702) are respectively in contact with the piston and the inner wall of the guide cylinder (7), and the airbag (6) is connected to the guide cylinder (7).

4. A thermistor detection device according to claim 3, characterized in that: The workbench (1) is fixedly connected to a support frame (102), the support frame (102) is fixedly connected to an electric telescopic rod (9), the output end of the electric telescopic rod (9) is fixedly connected to a connecting plate (901), the detection probe (10) is fixedly connected to the connecting plate (901), and the connecting plate (901) cooperates with the boosting rod (5).

5. A thermistor detection device according to claim 1, characterized in that: A buffer pad (801) is provided at the end of the limiting plate (8).

6. A thermistor detection device according to claim 1, characterized in that: A placement plate (201) is detachably connected inside the detection box (2), and the resistor body (3) is arranged on the placement plate (201).

7. A thermistor detection device according to claim 4, characterized in that: A protective cover (101) is fixedly connected to the workbench (1), and the support frame (102) is arranged inside the protective cover (101).

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