NTC test tool

Abstract

The utility model discloses an NTC (Negative Temperature Coefficient) test tool which comprises a mounting box, a connecting wire is arranged on the front surface of the mounting box, a test mechanism is arranged at the top end of the mounting box, the test mechanism comprises a test resistor and a control switch, a plug box is arranged at the bottom of the test resistor, and a fixing assembly is arranged on one side of the plug box; according to the utility model, the design of the connecting wire, the control switch, the test resistor and the fixing assembly is utilized, the test resistor is fixedly installed inside the plug box through the fixing assembly, when a test is needed, the NTC circuit and the test resistor can perform current flow through turning on the control switch, so that the NTC test is performed, and the test efficiency is improved. When the resistance value needs to be adjusted, a plurality of control switches can be turned on, so that a plurality of test resistors are connected for testing, a plurality of NTC test scenes are simulated, welding of the test resistors and an NTC circuit board is not needed, and the NTC test device is more convenient to use.

Description

Technical Field

[0001] The utility model relates to the field of NTC testing equipment, and particularly relates to an NTC testing tooling. Background Technique

[0002] NTC, also known as a thermistor, when testing NTC, it is necessary to connect the circuit board of NTC to the pins of multiple resistors one by one through soldering to detect the temperature change of NTC. However, in the test, it is necessary to replace resistors of various specifications. Therefore, it is necessary to remove the resistor and the circuit board of NTC. When removing, a soldering gun is required for removal, and then the next test resistor is soldered. This method requires multiple wiring and disconnection operations, which is not convenient enough. Content of the Utility Model

[0003] The purpose of the utility model is to provide an NTC testing tooling to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical scheme: an NTC testing tooling, including an installation box, a connection line for connecting the NTC circuit board is arranged on the front surface of the installation box, a testing mechanism for NTC testing is arranged on the top end of the installation box, the testing mechanism includes a test resistor and a control switch, a plug-in box for plugging the test resistor is arranged at the bottom of the test resistor, and a fixing component for fixing the test resistor is arranged on one side of the plug-in box.

[0005] Preferably, a plurality of the testing mechanisms are provided, the plurality of testing mechanisms are arranged in parallel, and the plurality of testing mechanisms are arranged in series with the connection line.

[0006] Preferably, the control switch is used to control the connection between the test resistor and the connection line.

[0007] Preferably, the bottom end of the plug-in box is fixedly connected to the top end of the installation box, and a placement groove for placing the test resistor is opened at the top end of the plug-in box.

[0008] Preferably, a through hole for inserting the pins of the test resistor is opened at the bottom end of the inner wall of the placement groove.

[0009] Preferably, the fixing component includes a pressing member and a pushing member, the pressing member includes a clamping claw, a pressing plate is fixedly connected to the top end of the clamping claw, and the pushing member is arranged on one side of the top end of the pressing plate.

[0010] Preferably, the pushing member includes a pushing spring, a round hole is opened on one side of the top end of the pressing plate, a fixing rod is sleeved inside the round hole, and the bottom end of the fixing rod is fixedly connected to the top end of the installation box.

[0011] Preferably, a second limiting plate for restricting the movement of the pushing spring is provided at the top of the fixing rod, a first limiting plate for restricting the movement of the pressing plate is sleeved on the outer wall of the bottom of the fixing rod, a threaded groove is opened at the top of the fixing rod, and an installation screw rod for inserting and connecting with the threaded groove is fixedly connected to the bottom end of the second limiting plate.

[0012] The technical effects and advantages of the present utility model:

[0013] With the design of the connecting line, control switch, test resistor and fixing component, the present utility model fixedly installs the test resistor inside the plug-in box through the fixing component. When testing is required, by turning on the control switch, current can flow between the NTC circuit and the test resistor, thereby performing the NTC test. When resistance adjustment is needed, multiple control switches can be turned on to connect multiple test resistors for testing, thus simulating multiple NTC test scenarios. At the same time, there is no need to weld the test resistor to the NTC circuit board, making it more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0015] Figure 2 It is a three-dimensional structure diagram of the test resistor and the fixing component of the present utility model.

[0016] Figure 3 It is a three-dimensional structure diagram of the fixing component of the present utility model.

[0017] Figure 4 It is a cross-sectional structure diagram of the fixing rod of the present utility model.

[0018] In the figure: 1, installation box; 2, connecting line; 3, control switch; 4, test resistor; 5, plug-in box; 6, fixing component; 61, pressing plate; 62, clamping claw; 63, fixing rod; 64, pushing spring; 65, first limiting plate; 66, second limiting plate; 67, installation screw rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] The present utility model provides as Figures 1-4An NTC test tooling as shown includes an installation box 1. A connecting wire 2 for connecting to an NTC circuit board is arranged on the front surface of the installation box 1. A test mechanism for NTC testing is arranged at the top of the installation box 1. The test mechanism includes a test resistor 4 and a control switch 3. A socket box 5 for plugging the test resistor 4 is arranged at the bottom of the test resistor 4. A fixing component 6 for fixing the test resistor 4 is arranged on one side of the socket box 5.

[0021] Specifically, multiple test mechanisms are provided. The multiple test mechanisms are arranged in parallel, and the multiple test mechanisms are arranged in series with the connecting wire 2. The control switch 3 is used to control the connection between the test resistor 4 and the connecting wire 2. The bottom end of the socket box 5 is fixedly connected to the top end of the installation box 1. A placement groove for placing the test resistor 4 is opened at the top end of the socket box 5. A through hole for inserting the pins of the test resistor 4 is opened at the bottom end of the inner wall of the placement groove.

[0022] Furthermore, at least four test mechanisms are provided. A connection circuit board is arranged inside the installation box 1. The connection circuit board is used to form a parallel connection of the four test mechanisms, and then form a series connection of the four test mechanisms with the connecting wire 2. The connecting wire 2 is electrically connected to the NTC circuit board through a plug. Each test mechanism includes a control switch 3. The control switch 3 is an existing six-pin three-position low-resistance boat-shaped switch, and its on-resistance is less than or equal to 20 mΩ. By turning on the control switch 3 corresponding to the test resistor 4, the corresponding test resistor 4 can be connected to the NTC to form a circuit for temperature testing of the NTC. When the total resistance needs to be increased or decreased, the corresponding control switch 3 is turned on or off. The two pins of the test resistor 4 are respectively inserted through the through hole and contact the connection circuit board. In order to keep the contact between the pins of the test resistor 4 and the connection circuit board stable, the test resistor 4 is pressed and fixed through the provided fixing component 6. The test resistor 4 is a resistor with a fixed resistance value. When replacement is needed, the pressing plate 61 is moved to pull out the test resistor 4 from the through hole, so as to quickly replace the test resistor 4.

[0023] Specifically, the fixing component 6 includes a pressing part and a pushing part. The pressing part includes clamping claws 62. A pressing plate 61 is fixedly connected to the top end of the clamping claws 62. The pushing part is arranged on one side of the top end of the pressing plate 61. The pushing part includes a pushing spring 64. A round hole is opened on one side of the top end of the pressing plate 61. A fixing rod 63 is sleeved inside the round hole. The bottom end of the fixing rod 63 is fixedly connected to the top end of the installation box 1. A second limiting plate 66 for restricting the movement of the pushing spring 64 is arranged at the top end of the fixing rod 63. A first limiting plate 65 for restricting the movement of the pressing plate 61 is sleeved on the outer wall of the bottom of the fixing rod 63. A threaded groove is opened at the top end of the fixing rod 63. An installation screw 67 for inserting and connecting with the threaded groove is fixedly connected to the bottom end of the second limiting plate 66.

[0024] Further, a fixing component 6 is provided on one side of each plug-in box 5. The bottom end of the fixing rod 63 is fixedly welded to the top end of the installation box 1. The first limiting plate 65 is fixedly sleeved on the outer wall of the fixing rod 63. A clamping groove is formed at the bottom of the clamping claw 62. The clamping groove is V-shaped, and the inner wall of the clamping groove is formed as a toothed surface or a rough surface, so as to increase the friction force when the inner wall of the clamping groove contacts the outer wall of the test resistor 4. The top end of the clamping claw 62 is fixedly welded to the bottom end of the pressing plate 61. A round hole is formed on the side of the top end of the pressing plate 61 away from the clamping claw 62. The diameter of the round hole is 1.02 times the diameter of the fixing rod 63. The inner diameter of the pushing spring 64 is 1.1 times the diameter of the round hole. The diameters of the second limiting plate 66 and the first limiting plate 65 are the same, both being 1.02 times the outer diameter of the pushing spring 64. The bottom end of the second limiting plate 66 is fixedly welded to the top end of the installation screw 67. The thread on the outer wall of the installation screw 67 meshes with the thread on the inner wall of the thread groove. By inserting and connecting the installation screw 67 with the thread groove, the second limiting plate 66 can be fixed to the top end of the fixing rod 63. The pushing spring 64 is sleeved on the outer wall of the top of the fixing rod 63. The pushing spring 64 is always in a compressed state between the second limiting plate 66 and the first limiting plate 65 and is arranged at the top end of the pressing plate 61. When fixing the test resistor 4, the pressing plate 61 is moved away from the installation box 1 and rotated to the top of the test resistor 4. At this time, the pushing spring 64 is further compressed. Under the restoring force of the pushing spring 64, the pressing plate 61 is pushed towards the test resistor 4, so as to insert the test resistor 4 into the clamping groove, and the clamping claw 62 stably presses the test resistor 4. When the test resistor 4 needs to be taken out, the pressing plate 61 is pulled away from the test resistor 4, so that the clamping claw 62 does not press the test resistor 4, and then the pressing plate 61 is rotated away from the test resistor 4, and thus the replacement of the test resistor 4 can be carried out.

[0025] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An NTC test tooling, characterized in that, It includes an installation box. A connecting wire for connecting an NTC circuit board is arranged on the front of the installation box. A testing mechanism for NTC testing is arranged at the top of the installation box. The testing mechanism includes a testing resistor and a control switch. A plug-in box for plugging the testing resistor is arranged at the bottom of the testing resistor. A fixing component for fixing the testing resistor is arranged on one side of the plug-in box.

2. The NTC testing tooling according to claim 1, characterized in that, A plurality of the testing mechanisms are provided, and the plurality of testing mechanisms are arranged in parallel and are arranged in series with the connecting wire.

3. The NTC testing tooling according to claim 1, characterized in that The control switch is used to control the connection between the testing resistor and the connecting wire.

4. An NTC test tooling according to claim 1, characterized in that, The bottom end of the plug-in box is fixedly connected to the top end of the installation box, and a placement groove for placing the testing resistor is opened at the top end of the plug-in box.

5. The NTC testing tooling according to claim 4, characterized in that, A through hole for inserting the pins of the testing resistor is opened at the bottom end of the inner wall of the placement groove.

6. The NTC testing tooling according to claim 1, characterized in that The fixing component includes a pressing member and a pushing member. The pressing member includes clamping claws. A pressing plate is fixedly connected to the top end of the clamping claws. The pushing member is arranged on one side of the top end of the pressing plate.

7. The NTC testing tooling according to claim 6, characterized in that, The pushing member includes a pushing spring. A round hole is opened on one side of the top end of the pressing plate. A fixing rod is sleeved inside the round hole. The bottom end of the fixing rod is fixedly connected to the top end of the installation box.

8. A kind of NTC test tooling according to claim 7, characterized in that, A second limiting plate for restricting the movement of the pushing spring is arranged at the top end of the fixing rod. A first limiting plate for restricting the movement of the pressing plate is sleeved on the outer wall of the bottom of the fixing rod. A threaded groove is opened at the top end of the fixing rod. A mounting screw for inserting and connecting with the threaded groove is fixedly connected to the bottom end of the second limiting plate.

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