Discontinuous adjustment type NTC testing device

Abstract

The utility model relates to the technical field of test equipment, and particularly discloses a discontinuous adjustment type NTC test device, which comprises a test function board internally provided with an NTC circuit; wherein the NTC circuit is provided with a first bonding pad and a second bonding pad which are used for accessing an NTC resistor; the function board jig comprises a jig body, a first binding post and a second binding post; the jig body is used for fixing the test function board; the first binding post is electrically connected to the first bonding pad; the second binding post is electrically connected to the second bonding pad; and one terminal of the variable resistance box is electrically connected to the first binding post, and the other terminal of the variable resistance box is electrically connected to the second binding post. The discontinuous adjustment type NTC testing device provided by the utility model can effectively solve the problem that the NTC related circuit function trigger testing efficiency is relatively low in the prior art.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to a discontinuous adjustment type NTC testing device. Background Art

[0002] An NTC resistor refers to a negative temperature coefficient thermistor (Negative Temperature Coefficient Resistance), whose resistance value decreases as the temperature increases. In an NTC circuit, the NTC resistor can sense the change of the ambient temperature and reflect this change by changing its own resistance value, so as to realize circuit functions such as temperature measurement, temperature compensation, and overheat protection.

[0003] Generally, NTC resistors are provided on the main boards of many electronic products such as Bluetooth headsets or mobile phones. Since the NTC resistor generates different resistance values at different temperatures, in order to test whether the corresponding circuit functions can be normally triggered at different resistance values, it is often necessary to put the main board into a temperature control test chamber for testing.

[0004] Specifically, the testing steps are as follows:

[0005] ① Put the main board to be tested with an NTC resistor into a temperature-adjustable temperature control test chamber, and monitor the working parameters of the main board to be tested in real time;

[0006] ② Adjust the temperature control test chamber to the preset temperature and wait for the temperature control test chamber to adjust the temperature;

[0007] ② After the temperature in the temperature control test chamber is stable, obtain the working parameters of the main board to be tested, and thus detect whether the corresponding circuit functions can be normally triggered.

[0008] There are the following two problems in the prior art:

[0009] Each time of testing requires adjusting the temperature of the temperature control test chamber and then waiting for the temperature to be constant, which takes a long time and results in low testing efficiency.

[0010] Therefore, the utility model is committed to researching and developing a discontinuous adjustment type NTC testing device to solve the problem of low testing efficiency for triggering the circuit functions related to NTC in the prior art.

[0011] The above information disclosed in this background section is only included to enhance the understanding of the background of the present disclosure, and thus may include information that does not form the prior art known to those of ordinary skill in the art at present. Summary of the Utility Model

[0012] An object of the present utility model is to provide a discontinuous adjustment type NTC testing device, which can effectively solve the problem of low testing efficiency of NTC-related circuit function triggering in the prior art.

[0013] To achieve the above object, the present utility model provides a discontinuous adjustment type NTC testing device, including:

[0014] A test function board, which contains an NTC circuit; wherein, the NTC circuit is provided with a first pad and a second pad for connecting an NTC resistor.

[0015] A function board fixture, which includes a fixture body for fixing the test function board, a first terminal electrically connected to the first pad, and a second terminal electrically connected to the second pad.

[0016] A rheostat, one terminal of which is electrically connected to the first terminal, and the other terminal is electrically connected to the second terminal.

[0017] Optionally, the fixture body is provided with a function board positioning groove for accommodating the test function board.

[0018] Optionally, the function board positioning groove is provided with avoidance grooves corresponding to the positions of the first pad and the second pad, and a first probe for electrically connecting to the first pad and a second probe for electrically connecting to the second pad are fixedly arranged in the avoidance grooves.

[0019] Optionally, the first probe is electrically connected to the first terminal.

[0020] The second probe is electrically connected to the second terminal.

[0021] Optionally, each of the first terminal and the second terminal is electrically connected to the rheostat through a quick wiring harness.

[0022] Optionally, the quick wiring harness includes a wiring clip for clamping the terminal of the rheostat, a conductive sleeve for sleeving on the first terminal or the second terminal, and a connecting wire electrically connecting the wiring clip and the conductive sleeve.

[0023] Optionally, the conductive sleeve includes a metal sleeve for sleeving on the first terminal or the second terminal and an insulating sleeve covering the outside of the metal sleeve.

[0024] Optionally, the conductive sleeve is magnetically connected to the fixture body through a magnetic attraction component.

[0025] Optionally, the magnetic attraction assembly includes a fixed magnetic ring fixedly arranged in the fixture body and a movable magnetic ring fixedly arranged in the insulating sleeve and magnetically connected to the fixed magnetic ring.

[0026] The beneficial effects of the present utility model are as follows: A discontinuous adjustment type NTC test device is provided. By connecting a rheostat between the first terminal and the second terminal to the first pad and the second pad, the NTC circuit of the functional board uses a rheostat to replace the NTC resistor in the NTC circuit to be tested;

[0027] When it is necessary to trigger the circuit function that should have been triggered by the NTC resistor, the output resistance of the rheostat can be directly adjusted so that the output resistance of the rheostat meets the triggering requirements of the relevant circuit function, and then the verification of the relevant triggering effect is carried out.

[0028] That is, for the discontinuous adjustment type NTC test device provided by the present utility model, when performing the triggering test of the circuit function, the output resistance of the rheostat can be directly adjusted without adjusting the ambient temperature, which greatly shortens the test time and thus improves the test efficiency.

[0029] Therefore, the discontinuous adjustment type NTC test device provided by the present utility model can effectively solve the problem of low efficiency in triggering tests of NTC-related circuit functions in the prior art. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a schematic structural diagram of the discontinuous adjustment type NTC test device provided for the embodiment.

[0032] In the figure:

[0033] 1. Test function board; 101. First pad; 102. Second pad;

[0034] 2. Function board fixture; 201. Fixture body; 202. First terminal; 203. Second terminal; 204. First probe; 205. Second probe;

[0035] 3. Rheostat;

[0036] 4. Quick wiring harness; 401. Wiring clip; 402. Conductive sleeve; 4021. Metal sleeve; 4022. Insulating sleeve; 403. Connecting wire;

[0037] 5. Fixed magnetic ring;

[0038] 6. Movable magnetic ring. Detailed implementation manners

[0039] In the present utility model, the mention of "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present utility model. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present utility model, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any manner to form corresponding implementable technical solutions.

[0040] Unless otherwise defined, the meanings of the technical terms used herein are the same as those commonly understood by those skilled in the technical field to which the present utility model belongs; the use of the relevant terms herein is only for describing specific embodiments and is not intended to limit the present utility model.

[0041] In the description of the present utility model, the phrase "and / or" is an expression used to describe the logical relationship between objects, indicating that there can be three relationships, for example, A and / or B, which means: the existence of A, the existence of B, and the simultaneous existence of A and B. In addition, the character " / " herein generally represents an "or" logical relationship between the associated objects before and after.

[0042] In the present utility model, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary-secondary or sequential relationship, etc. between these entities or operations.

[0043] Without more limitations, in the present utility model, the expressions such as "comprising", "including", "having" or other similar expressions used in the statements are intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method or product including the said elements, so that the process, method or product including a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to this process, method or product.

[0044] Similar to the understanding in the "Examination Guidelines", in this utility model, expressions such as "greater than", "less than", "exceeding", etc. are understood to exclude the base number; expressions such as "above", "below", "within", etc. are understood to include the base number. In addition, in the description of the embodiments of this utility model, the meaning of "a plurality of" is two or more (including two), and similar expressions related to "many" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically defined.

[0045] In the description of the embodiments of this utility model, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the drawing, and is only for the convenience of describing the specific embodiment of this utility model or for the reader to understand, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it cannot be understood as a limitation to the embodiments of this utility model.

[0046] Unless otherwise clearly specified or limited, in the description of the embodiments of this utility model, the terms such as "installed", "connected", "connected", "fixed", "set", etc. should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two components or the interaction relationship between two components. For those skilled in the technical field to which this utility model belongs, the specific meanings of the above terms in the embodiments of this utility model can be understood according to specific situations.

[0047] This utility model provides a non - continuous adjustment type NTC test device, which is applicable to the application scenario of triggering and testing the NTC - related circuit functions of the main board to be tested containing the NTC circuit, and can effectively solve the problem of low efficiency in triggering and testing the NTC - related circuit functions in the prior art.

[0048] See Figure 1 , the non - continuous adjustment type NTC test device provided in this embodiment includes a test function board 1, a function board fixture 2, and a rheostat 3.

[0049] The test function board 1 contains an NTC circuit. Among them, the NTC circuit is provided with a first pad 101 and a second pad 102 for the NTC resistor to be connected. The function board fixture 2 includes a fixture body 201 for fixing the test function board 1, a first terminal 202 electrically connected to the first pad 101, and a second terminal 203 electrically connected to the second pad 102. One terminal of the rheostat 3 is electrically connected to the first terminal 202, and the other terminal is electrically connected to the second terminal 203.

[0050] It should be noted that the NTC circuit contained in the test function board 1 (hereinafter referred to as the "function board NTC circuit") is the same as the NTC circuit contained in the main board to be tested (hereinafter referred to as the "to-be-tested NTC circuit") as a whole. The difference between the two is that the to-be-tested NTC circuit directly has an NTC resistor set, and in the position where the NTC resistor should be set in the function board NTC circuit, the NTC resistor is removed, and only the first pad 101 and the second pad 102 that can connect the NTC resistor are retained. In other words, for the test function board 1 provided in this embodiment, if a resistor is not connected between the first pad 101 and the second pad 102, the first pad 101 and the second pad 102 are in an open circuit state, and the function board NTC circuit is incomplete. If an NTC resistor is connected between the first pad 101 and the second pad 102, the function board NTC circuit will be exactly the same as the to-be-tested NTC circuit.

[0051] The non-continuous adjustment type NTC test device provided in this embodiment connects the rheostat 3 between the first pad 101 and the second pad 102 through the first terminal 202 and the second terminal 203, so that the function board NTC circuit uses a rheostat 3 to replace the NTC resistor in the to-be-tested NTC circuit;

[0052] When it is necessary to trigger the circuit function that should be triggered by the NTC resistor, the output resistance of the rheostat 3 can be directly adjusted so that the output resistance of the rheostat 3 meets the triggering requirements of the relevant circuit function, and then the verification of the relevant triggering effect is carried out.

[0053] When the non-continuous adjustment type NTC test device provided in this embodiment conducts the triggering test of the circuit function, the output resistance of the rheostat 3 can be directly adjusted, and there is no need to adjust the ambient temperature, which greatly shortens the test time and thus improves the test efficiency.

[0054] Therefore, the non-continuous adjustment type NTC test device provided by the present utility model can effectively solve the problem of low efficiency in triggering the test of NTC-related circuit functions in the prior art.

[0055] It should be noted that the rheostat 3 is assembled by a group of resistance wires with different resistance values. By adjusting the knob on the rheostat 3, the output resistance can be changed discontinuously, and the value of the output resistance can be directly read through the corresponding identification of the knob. The specific structure and working principle of the rheostat 3 are not the focus of this embodiment, so they will not be elaborated here.

[0056] Optionally, the fixture body 201 is provided with a function board positioning groove for accommodating the test function board 1. The function board positioning groove is provided with avoidance grooves corresponding to the positions of the first pad 101 and the second pad 102, and a first probe 204 for electrically connecting to the first pad 101 and a second probe 205 for electrically connecting to the second pad 102 are fixedly arranged in the avoidance grooves. The first probe 204 is electrically connected to the first terminal 202; the second probe 205 is electrically connected to the second terminal 203.

[0057] In this embodiment, each of the first terminal 202 and the second terminal 203 is electrically connected to the rheostat 3 through a quick wiring harness 4. The first terminal 202 and the second terminal 203 are electrically connected to the rheostat 3 through the quick wiring harness 4. The use of the quick wiring harness 4 facilitates quick connection and disconnection, improving the flexibility of the test device.

[0058] Optionally, the quick wiring harness 4 includes a wiring clip 401 for clamping the terminal of the rheostat 3, a conductive sleeve 402 for sleeving with the first terminal 202 or the second terminal 203, and a connecting wire 403 electrically connecting the wiring clip 401 and the conductive sleeve 402. The direct sleeving operation between the conductive sleeve 402 and the terminal is convenient for installation and disassembly, greatly improving the installation and disassembly efficiency.

[0059] Further, the conductive sleeve 402 includes a metal sleeve 4021 for sleeving with the first terminal 202 or the second terminal 203, and an insulating sleeve 4022 covering the outside of the metal sleeve 4021. The use of the insulating sleeve 4022 can effectively prevent short circuits and ensure the safety of the test process.

[0060] In this embodiment, the conductive sleeve 402 is magnetically connected to the fixture body 201 through a magnetic attraction component. Optionally, the magnetic attraction component includes a fixed magnetic ring 5 fixed in the fixture body 201 and a movable magnetic ring 6 fixed in the insulating sleeve 4022 and magnetically connected to the fixed magnetic ring 5. The conductive sleeve 402 is magnetically connected to the fixture body 201 through the magnetic attraction component. The magnetic connection facilitates quick installation and disassembly, improving the convenience of use of the test device.

[0061] In summary, the discontinuous adjustment type NTC test device provided by this embodiment has the following advantages:

[0062] ① Through the adjustment of the rheostat 3, the discontinuous simulation of the NTC resistor is achieved without the need to adjust the ambient temperature, greatly shortening the test time and improving the test efficiency;

[0063] ② The design of the conductive sleeve 402 reduces the contact resistance, facilitates installation and disassembly, improves the installation and disassembly efficiency, and at the same time ensures good electrical conductivity;

[0064] ③ The design of the magnetic attraction component facilitates quick installation and disassembly, improving the convenience of use of the test device.

[0065] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of this application, the patent protection scope of this application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification based on the essential concept of this application, using the content recorded in the text and drawings of the specification of this application, and any technical solutions directly or indirectly implementing the above embodiments in other related technical fields are all included in the patent protection scope of this application.

Claims

1. A discontinuously adjustable NTC test device, characterized in that: include: A test function board (1), the test function board (1) containing an NTC circuit; wherein the NTC circuit is provided with a first soldering pad (101) and a second soldering pad (102) for connecting an NTC resistor; A function board fixture (2), the function board fixture (2) comprising a fixture body (201) for fixing the test function board (1), a first terminal (202) electrically connected to the first solder pad (101), and a second terminal (203) electrically connected to the second solder pad (102); A variable resistance box (3), wherein one terminal of the variable resistance box (3) is electrically connected to the first terminal (202), and the other terminal is electrically connected to the second terminal (203).

2. The discontinuously adjustable NTC test device according to claim 1, characterized in that: The fixture body (201) is provided with a function board positioning groove for accommodating the test function board (1).

3. The discontinuously adjustable NTC test device according to claim 2, characterized in that: The functional board positioning groove is provided with an avoidance groove at positions corresponding to the first solder pad (101) and the second solder pad (102), and a first probe (204) for electrically connecting to the first solder pad (101) and a second probe (205) for electrically connecting to the second solder pad (102) are fixedly arranged in the avoidance groove.

4. The discontinuously adjustable NTC test device according to claim 3, characterized in that: The first probe (204) is electrically connected to the first terminal (202); The second probe (205) is electrically connected to the second terminal (203).

5. The discontinuously adjustable NTC test device according to claim 1, characterized in that: The first terminal (202) and the second terminal (203) are each electrically connected to the variable resistance box (3) via a quick-connect harness (4).

6. The discontinuously adjustable NTC test device according to claim 5, characterized in that: The quick-connect harness (4) comprises a wiring clamp (401) for clamping a terminal of the variable resistance box (3), a conductive sleeve (402) for sleeve-engaging with the first wiring post (202) or the second wiring post (203), and a connecting wire (403) for electrically connecting the wiring clamp (401) and the conductive sleeve (402).

7. The discontinuously adjustable NTC test device according to claim 6, characterized in that: The conductive sleeve (402) comprises a metal sleeve (4021) for sleeve-engaging with the first terminal (202) or the second terminal (203), and an insulating sleeve (4022) covering the outside of the metal sleeve (4021).

8. The discontinuously adjustable NTC test device according to claim 7, characterized in that: The conductive sleeve (402) is magnetically connected to the fixture body (201) via a magnetic attraction component.

9. The discontinuously adjustable NTC test device according to claim 8, characterized in that: The magnetic attraction component comprises a fixed magnetic ring (5) fixed in the fixture body (201), and a movable magnetic ring (6) fixed in the insulating sleeve (4022) and magnetically connected to the fixed magnetic ring (5).

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