NTC thermistor chip testing machine

Abstract

The utility model discloses an NTC thermistor chip testing machine which comprises a water tank, the top of the water tank is connected with a case in a penetrating mode, the front face of the case is provided with a through opening, an inner cavity of the through opening is connected with a case door in a clamping mode, an inner ring of the through opening is provided with a containing groove, an inner cavity of the containing groove is provided with an air bag, and the left side of the case is provided with an air box. A motor is arranged at the top of the air bellow, and an air blowing mechanism is arranged in an inner cavity of the air bellow. According to the testing machine, when the box door is placed in the through hole, the motor can drive the fan blades to rotate rapidly through the rotating shaft, the fan blades can blow air in the air box into the air bag through the air injection hole, the air bag is bulged, the clamping blocks can be clamped into the clamping holes, meanwhile, the inner ring of the air bag is tightly attached to the outer ring of the box door, and therefore the interior of the machine box can be sealed; after being used for a long time, the sealing structure cannot be abraded or aged, and good sealing in the case can be kept all the time, so that the accuracy of a performance test result of the NTC thermistor chip is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of thermistor testing, in particular to an NTC thermistor chip testing machine. Background Art

[0002] NTC thermistor chip is an important temperature sensor. Its resistance value decreases as the temperature increases. This characteristic makes it widely used in the field of temperature detection and control. NTC thermistor chips have a wide range of applications. They are widely used in household appliances, communications, electricity, medical equipment, test instruments, power supply equipment, industrial electronic equipment and other fields.

[0003] After the NTC thermistor chip is manufactured, it is necessary to test its various performances, including electrical performance, temperature response, durability, and stability. The test is generally carried out in a special testing machine.

[0004] When testing the performance of NTC thermistor chips, the test machine needs to be sealed, and the door of the existing test machine is generally sealed by a rubber seal. After long-term use, the seal is prone to wear or aging, which greatly weakens its sealing performance, making it difficult to ensure good sealing inside the test machine, which will lead to inaccurate test results of the NTC thermistor chip performance. To this end, we provide an NTC thermistor chip test machine. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the utility model provides an NTC thermistor chip tester, which solves the problem that the sealing performance of the door sealing ring of the current tester will be weakened after long-term use.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an NTC thermistor chip testing machine, comprising a water tank, the top of the water tank is connected to a chassis, a through opening is provided on the front of the chassis, a box door is clamped in the inner cavity of the through opening, a placement groove is provided in the inner circle of the through opening, an air bag is provided in the inner cavity of the placement groove, a bellows is provided on the left side of the chassis, a motor is provided on the top of the bellows, a blowing mechanism is provided in the inner cavity of the bellows, heating tubes are provided on the left and right sides of the inner wall of the water tank, and a plurality of electric heating wires are evenly provided in the inner cavity of the heating tubes.

[0009] Preferably, the outer ring of the box door is evenly provided with a plurality of clamping holes, the inner ring of the airbag is evenly provided with a plurality of clamping blocks, the clamping blocks are clamped into the inner cavities of the clamping holes, and the clamping blocks correspond to the clamping holes one by one.

[0010] Preferably, a plurality of air injection holes are opened at equal distances on the left side of the chassis, the air inlets of the air injection holes are communicated with the inner cavity of the bellows, and the air outlets of the air injection holes pass through the left side of the airbag.

[0011] Preferably, the right side of the bellows is open, and a plurality of through holes are evenly formed on the bottom of the bellows.

[0012] Preferably, the blowing mechanism includes a rotating shaft, the bottom of which is rotatably connected to the bottom of the inner wall of the bellows, the top of which passes through the top of the inner wall of the bellows and is fixedly connected to the output shaft of the motor, and the outer ring of the rotating shaft is evenly provided with multiple blades.

[0013] Preferably, an exhaust pipe is connected through the top of the chassis, an air inlet of the exhaust pipe passes through the top of the airbag, and an exhaust valve is arranged on the right side of the exhaust pipe.

[0014] (III) Beneficial effects

[0015] The utility model provides an NTC thermistor chip testing machine, which has the following beneficial effects:

[0016] 1. When the test machine puts the box door into the opening, the motor can drive the fan blade to rotate quickly through the shaft. The fan blade can blow the air in the bellows into the airbag through the air injection hole to make the airbag swell. The card block can be inserted into the card hole. At the same time, the inner circle of the airbag fits tightly with the outer circle of the box door, so that the inside of the chassis can be sealed. The sealing structure will not wear or age after long-term use, and can always keep the inside of the chassis well sealed to ensure the accuracy of the performance test results of the NTC thermistor chip.

[0017] 2. When testing, the test machine can energize the electric heating wire, which can heat the water in the water tank. The warm water can be used to keep the temperature in the chassis constant to ensure the accuracy of the performance test results of the NTC thermistor chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the planar structure of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the chassis and its upper components of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the box door of the utility model;

[0022] Figure 5 For this utility model Figure 2 Enlarged view of point A in .

[0023] In the figure: 1. water tank; 2. chassis; 21. opening; 22. box door; 221. clamping hole; 23. placement slot; 24. air injection hole; 3. air bag; 31. clamping block; 4. bellows; 41. through hole; 5. motor; 6. blowing mechanism; 61. rotating shaft; 62. fan blade; 7. heating tube; 71. electric heating wire; 8. exhaust pipe; 81. exhaust valve. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-5 As shown, the utility model provides a technical solution: an NTC thermistor chip testing machine, comprising a water tank 1, the top of the water tank 1 is connected to a chassis 2, the front of the chassis 2 is provided with a through opening 21, the inner cavity of the through opening 21 is clamped with a box door 22, the inner circle of the through opening 21 is provided with a placement groove 23, the inner cavity of the placement groove 23 is provided with an air bag 3, when in use, the NTC thermistor chip to be tested is placed in the chassis 2, and then the box door 22 is placed in the through opening 21.

[0026] Specifically, a bellows 4 is provided on the left side of the chassis 2, a motor 5 is provided on the top of the bellows 4, and a blowing mechanism 6 is provided in the inner cavity of the bellows 4. The blowing mechanism 6 includes a rotating shaft 61, and the bottom of the rotating shaft 61 is rotatably connected to the bottom of the inner wall of the bellows 4, and the top of the rotating shaft 61 passes through the top of the inner wall of the bellows 4 and is fixedly connected to the output shaft of the motor 5. A plurality of fan blades 62 are evenly arranged on the outer ring of the rotating shaft 61, and the fan blades 62 are arc-shaped. When the box door 22 is placed in the opening 21, the motor 5 is turned on, and its output shaft can drive the fan blades 62 to rotate rapidly through the rotating shaft 61.

[0027] The right side of the bellows 4 is open, and a plurality of through holes 41 are evenly formed on the bottom of the bellows 4 .

[0028] Furthermore, a plurality of air injection holes 24 are provided at equal distances on the left side of the chassis 2. The air inlet of the air injection hole 24 is connected to the inner cavity of the bellows 4, and the air outlet of the air injection hole 24 passes through the left side of the airbag 3. In the initial state, there is no gas in the airbag 3 and it is in a deflated state. When the fan blade 62 rotates, the air in the bellows 4 can be blown into the airbag 3 through the air injection hole 24 to make the airbag 3 inflate. At the same time, the outside air enters the bellows 4 through the through hole 41 to compensate for the internal air pressure difference.

[0029] Furthermore, the outer ring of the box door 22 is evenly provided with a plurality of card holes 221, and the inner ring of the airbag 3 is evenly provided with a plurality of card blocks 31, which are inserted into the inner cavity of the card holes 221, and the card blocks 31 correspond to the card holes 221 one by one. When the airbag 3 is inflated, the card blocks 31 can be inserted into the card holes 221, and at the same time, the inner ring of the airbag 3 fits tightly with the outer ring of the box door 22, so that the inside of the chassis 2 can be sealed. The sealing structure will not produce wear or aging after long-term use, and can always keep the inside of the chassis 2 well sealed to ensure the accuracy of the results of the NTC thermistor chip performance test.

[0030] Specifically, heating tubes 7 are provided on the left and right sides of the inner wall of the water tank 1, and a plurality of electric heating wires 71 are evenly provided in the inner cavity of the heating tubes 7. A plug is connected through the top of the water tank 1. When in use, the plug can be pulled out and water can be poured into the water tank 1. During testing, the chassis 2 is equipped with corresponding testing equipment, and the performance of the NTC thermistor chip can be tested. At the same time, the electric heating wire 71 can be energized, and the electric heating wire 71 can heat the water in the water tank 1. The warm water can be used to keep the chassis 2 in a water bath to keep the temperature inside constant, so as to ensure that the results of the performance test of the NTC thermistor chip are accurate.

[0031] Furthermore, an exhaust pipe 8 is connected through the top of the chassis 2, and the air inlet of the exhaust pipe 8 passes through the top of the airbag 3. An exhaust valve 81 is provided on the right side of the exhaust pipe 8. After the test is completed, the exhaust valve 81 can be opened, and the air in the airbag 3 is released to deflate the airbag 3, so that the card block 31 can be pulled out of the card hole 221, and then the box door 22 can be opened to take out the NTC thermistor chip in the chassis 2.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] Although the 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. An NTC thermistor chip testing machine, comprising a water tank (1), characterized in that: The top of the water tank (1) is connected to a machine box (2), a through opening (21) is provided on the front of the machine box (2), a box door (22) is clamped in the inner cavity of the through opening (21), a placement groove (23) is provided in the inner circle of the through opening (21), an air bag (3) is arranged in the inner cavity of the placement groove (23), a bellows (4) is arranged on the left side of the machine box (2), a motor (5) is arranged on the top of the bellows (4), a blowing mechanism (6) is arranged in the inner cavity of the bellows (4), heating pipes (7) are arranged on the left and right sides of the inner wall of the water tank (1), and a plurality of electric heating wires (71) are evenly arranged in the inner cavity of the heating pipe (7).

2. The NTC thermistor chip tester according to claim 1, characterized in that: The outer ring of the box door (22) is evenly provided with a plurality of clamping holes (221), and the inner ring of the airbag (3) is evenly provided with a plurality of clamping blocks (31). The clamping blocks (31) are clamped into the inner cavity of the clamping holes (221), and the clamping blocks (31) correspond to the clamping holes (221) one by one.

3. The NTC thermistor chip testing machine according to claim 1, characterized in that: A plurality of air injection holes (24) are provided at equal distances on the left side of the chassis (2); the air inlets of the air injection holes (24) are connected to the inner cavity of the bellows (4); and the air outlets of the air injection holes (24) penetrate the left side of the airbag (3).

4. The NTC thermistor chip testing machine according to claim 1, characterized in that: The right side of the bellows (4) is open, and a plurality of through holes (41) are evenly arranged on the bottom of the bellows (4).

5. The NTC thermistor chip testing machine according to claim 1, characterized in that: The blowing mechanism (6) comprises a rotating shaft (61), the bottom of the rotating shaft (61) is rotatably connected to the bottom of the inner wall of the bellows (4), the top of the rotating shaft (61) passes through the top of the inner wall of the bellows (4) and is fixedly connected to the output shaft of the motor (5), and the outer ring of the rotating shaft (61) is evenly provided with a plurality of fan blades (62).

6. The NTC thermistor chip testing machine according to claim 1, characterized in that: An exhaust pipe (8) is connected through the top of the chassis (2), an air inlet of the exhaust pipe (8) passes through the top of the airbag (3), and an exhaust valve (81) is arranged on the right side of the exhaust pipe (8).

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