A temperature characteristic testing device for a thermistor

Abstract

The present invention relates to the field of thermistor temperature detection, and discloses a temperature characteristic testing device for a thermistor, including a base. A plurality of slots are arranged in a linear arrangement at the top of the base, and thermistors are inserted into the slots. A fixing structure is provided inside the base, and a temperature control structure is provided on the top of the base. The temperature control structure includes a housing, and the interior of the housing is hollow. The temperature characteristic testing device for a thermistor provided by the present invention has a temperature control structure. The temperature control structure can control two movable plates that move up and down staggeredly through a knob to cool and heat the thermistor, without the need to frequently replace the temperature control machine and achieve better temperature control of the thermistor. When it is necessary to detect the resistance condition of the thermistor under a high temperature state, only by rotating the knob, the movable plate with a heating plate can be moved downward to the position closest to the thermistor.

Description

Technical Field

[0001] The present invention relates to the technical field of thermistor temperature detection, and specifically to a temperature characteristic testing device for thermistors. Background Art

[0002] In the patent application with the application publication number CN204694378U, it includes a thermistor fixture, a temperature control box and a controller. The thermistor fixture and the temperature control box are both electrically connected to the controller, and the controller is connected with a display device. A test cavity is provided inside the temperature control box. The thermistor fixture is located in the test cavity. Airflow holes are provided on the surrounding side walls of the test cavity. An airflow channel is provided between the surrounding side walls of the test cavity and the outer wall of the temperature control box. The airflow holes communicate with the airflow channel. A heating device is provided at the bottom of the test cavity, and a fan device is provided below the heating device. A temperature sensor is also provided inside the test cavity. Advantages: There is a thermistor fixture. The thermistor is fixed on the thermistor fixture. The thermistor fixture is placed in the test cavity. The temperature control box can control the temperature inside the test cavity. The resistance value of the tested thermistor and the temperature inside the test cavity are directly fed back to the controller. The controller can directly generate the resistance-temperature characteristic curve of the thermistor. The test is very convenient, the test accuracy is high, and no manual participation is required, that is, the test cost is reduced, the test efficiency is improved, and it has a broad market application prospect. It can be widely used in the temperature and resistance characteristic tests of thermistor products.

[0003] In the prior art including the above patents and in real products, the comparative document is suitable for production-type batch detection when detecting the temperature of thermistors, and cannot perform comparative temperature detection on new and old replacement types of thermistors. When detecting the temperature in the laboratory, mostly the thermistor is placed in cold and hot water at the same temperature for a certain period of time, taken out and dried, and then the pins are inserted into the foam board and the multimeter is held by both hands for measurement. Since the pins are relatively thin, the insertion is not stable enough. When the user is detecting, the thermistor is prone to tilt and fall, and the detection and recording need to be carried out by two separate people. The switching of cold and hot temperatures is also relatively troublesome, resulting in the inability to quickly, effectively and accurately record and observe the numerical changes of the thermistor at different temperatures. Summary of the Invention

[0004] The problem to be solved by the present invention is that when testing the thermistor, the manual heating with cold and hot water cannot set the temperature and cannot effectively fix the thermistor for detection.

[0005] To solve the above technical problems, the technical solution of the present invention is: a temperature characteristic testing device for thermistors, including a base. A plurality of slots are arranged in a linear arrangement at the top of the base. Thermistors are inserted into the slots. A fixing structure is provided inside the base, and a temperature control structure is provided at the top of the base.

[0006] The temperature control structure includes a shell, the interior of the shell is hollow, one side of the shell is provided with two movable plates that can move alternately with each other, the interior of the shell is rotatably provided with a gear, one side of the shell is rotatably provided with a knob, and one side of the knob is fixedly connected to one side of the gear.

[0007] Preferably, limit blocks are fixedly provided on the front and back sides of the inner wall of the shell, racks are slidably provided on the limit blocks, the racks slide up and down along the limit blocks, and the racks are meshed with gears.

[0008] Preferably, a connecting block is fixedly provided on one side of the rack, one side of the connecting block penetrates the shell and extends to the outside of the shell, and one side of the connecting block is fixedly connected to one side of the movable plate.

[0009] Preferably, there are two movable plates, a heating plate is fixedly provided on the front side of one of the movable plates, a cooling plate is provided on the front side of the other movable plate, and cooling fans are provided on both sides of the front side of the cooling plate.

[0010] Preferably, the fixing structure includes a slide plate, one side of which slides through the base and extends to the inside of the base, a control block is fixedly provided on the top of the slide plate, a clamping block is fixedly provided on one side of the slide plate, and a pull ring is fixedly provided on one side of the clamping block.

[0011] Preferably, a tilting block is fixedly provided on one side of the inner wall of the slot, and a positioning plate is fixedly provided on the other side of the inner wall of the slot, and the positioning plate is L-shaped.

[0012] Preferably, a rotating plate is rotatably provided between the front and back sides of the inner wall of the base, and a fixing block is rotatably provided on the top of the rotating plate, and the fixing block is used to fix the thermistor.

[0013] Preferably, a roller is provided at the bottom of the rotating plate, the roller is matched with the control block, a spring is fixedly provided at the bottom of one side of the rotating plate, and the other side of the spring is fixedly connected to the inner wall of the base.

[0014] Preferably, a groove is provided on one side of the base, a magnetic block is provided on the top of one side of the groove, the magnetic block is adapted to the clamping block, an outer plate is provided on the front side of the base, and measuring instruments are provided on both sides of the front side of the base.

[0015] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0016] (1) The base is provided with a temperature control structure. The temperature control structure can control two movable plates that move up and down alternately through a knob to achieve cooling and heating of the thermistor, eliminating the need to frequently replace the temperature control machine and enabling better temperature control of the thermistor. When it is necessary to detect the resistance of the thermistor under high-temperature conditions, simply rotate the knob, and the movable plate with the heating plate can be moved downward to the position closest to the thermistor. Conversely, when cooling is required, the heating plate can be raised and the cooling plate can be lowered. Moreover, when cooling is needed after heating or when the heating plate needs to be cooled and the thermistor needs to return to room temperature, the heating plate and the cooling plate can be aligned at the same height, and the heating can be turned off and the cooling can be turned on to quickly achieve temperature balance. This open-type heating and cooling can be carried out within a small range and can quickly return to the initial temperature once stopped, without the need to wait for a long time for the temperature to recover. This is convenient for testing whether the thermistor will be damaged when it returns to the initial temperature after experiencing extreme environments. Additionally, the base is small in size, making it convenient for users to carry and move, and it is more suitable for use in working environments such as laboratories.

[0017] (2) The interior of the base is provided with a fixing structure. The fixing structure enables users to quickly fix the thermistor through a simple push-pull action by the cooperation between the sliding plate and the rotating plate. Compared with the insecure fixing method of directly inserting into a foam board, the fixing structure allows the thermistor not to require too much manual effort during the detection process, enabling users to more attentively record the change in the resistance value of the thermistor. When the sliding plate is opened, the thermistor can be removed. When the sliding plate is closed, it can control the fixing of the pins of the thermistor through the linkage with the rotating plate. One side of the sliding plate is provided with an iron block that can cooperate with the magnetic attraction block on one side of the base to produce a fixing effect. The fixing structure also has an inclined block and a positioning plate. The inclined block can play a guiding role through its inclined edge to ensure that the cathode moves downward without skewing, and the positioning plate can ensure that the depth of the pins is not too deep to prevent the body of the thermistor from contacting the base. Description of the Drawings

[0018] Figure 1 Schematic diagram of the overall structure of the present invention;

[0019] Figure 2 Schematic diagram of the internal structure of the base of the present invention;

[0020] Figure 3 Front view schematic diagram of the internal structure of the base of the present invention;

[0021] Figure 4 Top view schematic diagram of the base structure of the present invention;

[0022] Figure 5 Schematic diagram of the sliding plate structure of the present invention;

[0023] Figure 6 Schematic diagram of the inclined block structure of the present invention;

[0024] Figure 7 Schematic diagram of the rotating plate structure of the present invention;

[0025] Figure 8 Explosion diagram of the fixed structure of the present invention;

[0026] Figure 9 Schematic diagram of the misaligned movement of the movable plate structure of the present invention;

[0027] Figure 10 Front view schematic diagram of the movable plate structure of the present invention;

[0028] Figure 11 Schematic diagram of the gear structure of the present invention.

[0029] In the figure: 1, temperature control structure; 101, outer shell; 102, movable plate; 103, cooling plate; 104, knob; 105, cooling fan; 106, heating plate; 107, rack; 108, limit block; 109, gear; 110, connecting block; 2, base; 3, fixed structure; 301, pull ring; 302, clamping block; 303, sliding plate; 304, positioning plate; 305, inclined block; 306, control block; 307, fixed block; 308, rotating plate; 309, roller; 310, spring; 4, thermistor; 5, slot; 6, measuring instrument; 7, outer plate; 8, magnetic attraction block. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0031] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The terms such as "including" or "comprising" used in the present disclosure mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, and may also include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0032] As Figures 1 to 11As shown, a temperature characteristic test device for a thermistor provided by the present invention comprises a base 2, a plurality of slots 5 are arranged in a straight line on the top of the base 2, a thermistor 4 is inserted into the slot 5, a fixing structure 3 is provided inside the base 2, and a temperature control structure 1 is provided on the top of the base 2;

[0033] The temperature control structure 1 includes a shell 101, the interior of the shell 101 is hollow, and two movable plates 102 that can move alternately with each other are provided on one side of the shell 101. A gear 109 is rotatably provided inside the shell 101, and a knob 104 is rotatably provided on one side of the shell 101, and one side of the knob 104 is fixedly connected to one side of the gear 109.

[0034] Limit blocks 108 are fixedly provided on the front and back of the inner wall of the housing 101 , and a rack 107 is slidably provided on the limit blocks 108 . The rack 107 slides up and down along the limit blocks 108 , and the rack 107 is meshed with a gear 109 .

[0035] A connecting block 110 is fixedly provided on one side of the rack 107 . One side of the connecting block 110 penetrates the housing 101 and extends to the outside of the housing 101 . One side of the connecting block 110 is fixedly connected to one side of the movable plate 102 .

[0036] There are two movable plates 102 , a heating plate 106 is fixedly provided on the front of one movable plate 102 , a cooling plate 103 is provided on the front of the other movable plate 102 , and cooling fans 105 are provided on both sides of the front of the cooling plate 103 .

[0037] The fixed structure 3 includes a slide plate 303, one side of which slides through the base 2 and extends to the inside of the base 2, a control block 306 is fixedly provided on the top of the slide plate 303, a clamping block 302 is fixedly provided on one side of the slide plate 303, and a pull ring 301 is fixedly provided on one side of the clamping block 302.

[0038] A tilting block 305 is fixedly provided on one side of the inner wall of the slot 5 , and a positioning plate 304 is fixedly provided on the other side of the inner wall of the slot 5 . The positioning plate 304 is L-shaped.

[0039] A rotating plate 308 is rotatably provided between the front and back sides of the inner wall of the base 2 , and a fixing block 307 is rotatably provided on the top of the rotating plate 308 . The fixing block 307 is used to fix the thermistor 4 .

[0040] A roller 309 is provided at the bottom of the rotating plate 308 , and the roller 309 is adapted to the control block 306 . A spring 310 is fixedly provided at the bottom of one side of the rotating plate 308 , and the other side of the spring 310 is fixedly connected to the inner wall of the base 2 .

[0041] One side of the base 2 is provided with a groove. At the top of one side of the groove, there is a magnetic attraction block 8, which is adapted to the clamping block 302. The front of the base 2 is provided with an outer plate 7, and measuring instruments 6 are provided on both sides of the front of the base 2.

[0042] The working principle and usage process of the present invention: When in use, the user first aligns the two pins at the bottom of the thermistor 4 with the slots 5 at the top of the base 2. After alignment, insert the pins into the slots 5. When inserting, the hypotenuse of the inclined block 305 will guide the pins to move onto the cross plate at the bottom of the positioning plate 304. Stop when feeling resistance during the downward insertion of the pins. Select the number of thermistors 4 to be inserted according to needs. Insert one for single test and insert two for comparative test. After insertion, push the clamping block 302 to one side. The clamping block 302 drives the sliding plate 303 to move to one side, and the sliding plate 303 drives the control block 306 to move to one side. As the control block 306 continues to move, it will contact the roller 309 at the bottom of the rotating plate 308. Through extrusion, it drives the rotating plate 308 to rotate around the rotation connection point with the inner wall of the base 2. The rotation of the rotating plate 308 will compress the spring 310 and rotate itself. After the rotating plate 308 rotates, it will drive the fixing block 307 to fix the pins of the thermistor 4, avoiding looseness during detection. The rotating plate 308 is electrically connected to the measuring instrument 6. While rotating and fixing, the rotating plate 308 can also cooperate with the measuring instrument 6 to detect the resistance value. At this time, after the clamping block 302 moves to the innermost part, it will be attracted to the magnetic attraction block 8, increasing the fixation and liberating the user's hands. When it is necessary to remove the thermistor 4 later, just pull the pull ring 301 to one side to open the clamping block 302. After fixing the thermistor 4, heating or cooling can be controlled according to the detection needs. When adjusting, rotate the knob 104. The knob 104 drives the gear 109 to rotate, and the gear 109 drives the two racks 107 to move up and down in an interlaced manner along the limit block 108. When it is necessary to simulate a high-temperature environment, move the heating plate 106 to the position closest to the thermistor 4. When it is necessary to return to normal temperature after heating, move the heating plate 106 and the cooling plate 103 to the same position, turn off heating and turn on cooling, and the thermistor 4 can quickly return to the normal state. When it is necessary to cool, similarly move the cooling plate 103 to the position closest to the thermistor 4. During temperature simulation, the user can detect the changes of the thermistor 4 at different temperatures in real time through the measuring instrument 6, making the use more focused and the records more accurate.

[0043] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A temperature characteristic testing device for a thermistor, comprising a base (2), characterized in that: The top of the base (2) is provided with a plurality of slots (5) arranged in a straight line, the slots (5) are plugged with thermistors (4), a fixing structure (3) is provided inside the base (2), and a temperature control structure (1) is provided on the top of the base (2); The temperature control structure (1) comprises a shell (101), the interior of the shell (101) is hollow, one side of the shell (101) is provided with two movable plates (102) that can move in an interlaced manner, a gear (109) is rotatably provided inside the shell (101), a knob (104) is rotatably provided on one side of the shell (101), one side of the knob (104) is fixedly connected to one side of the gear (109), and a limit block (108) is fixedly provided on the front and back sides of the inner wall of the shell (101), a rack (107) is slidably provided on the limit block (108), and the rack (107) moves along the limit block (108). Sliding up and down, the rack (107) and the gear (109) are meshed with each other, a connecting block (110) is fixedly provided on one side of the rack (107), one side of the connecting block (110) passes through the shell (101) and extends to the outside of the shell (101), one side of the connecting block (110) is fixedly connected to one side of the movable plate (102), the number of the movable plates (102) is two, one of the movable plates (102) is fixedly provided with a heating plate (106) on the front side, and the other movable plate (102) is provided with a cooling plate (103) on the front side, and cooling fans (105) are provided on both sides of the front side of the cooling plate (103).

2. The temperature characteristic testing device for a thermistor according to claim 1, characterized in that: The fixed structure (3) comprises a slide plate (303), one side of the slide plate (303) slides through the base (2) and extends to the inside of the base (2), a control block (306) is fixedly provided on the top of the slide plate (303), a clamping block (302) is fixedly provided on one side of the slide plate (303), and a pull ring (301) is fixedly provided on one side of the clamping block (302).

3. The temperature characteristic testing device for a thermistor according to claim 1, characterized in that: A tilting block (305) is fixedly provided on one side of the inner wall of the slot (5), and a positioning plate (304) is fixedly provided on the other side of the inner wall of the slot (5), wherein the positioning plate (304) is L-shaped.

4. A temperature characteristic testing device for a thermistor according to claim 1, characterized in that: A rotating plate (308) is rotatably provided between the front and back sides of the inner wall of the base (2), and a fixing block (307) is rotatably provided on the top of the rotating plate (308), wherein the fixing block (307) is used to fix the thermistor (4).

5. The temperature characteristic testing device for a thermistor according to claim 4, wherein: A roller (309) is provided at the bottom of the rotating plate (308), and the roller (309) is adapted to the control block (306). A spring (310) is fixedly provided at the bottom of one side of the rotating plate (308), and the other side of the spring (310) is fixedly connected to the inner wall of the base (2).

6. The temperature characteristic testing device for a thermistor according to claim 1, characterized in that: A groove is provided on one side of the base (2), a magnetic block (8) is provided on the top of one side of the groove, the magnetic block (8) is matched with the clamping block (302), an outer plate (7) is provided on the front side of the base (2), and measuring instruments (6) are provided on both sides of the front side of the base (2).

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