CN215728614U

CN215728614U - Control circuit, device and system

Info

Publication number: CN215728614U
Application number: CN202121292736.2U
Authority: CN
Inventors: 廖科华; 张志清; 钟志津
Original assignee: Shenzhen KTC Commercial Technology Co Ltd
Current assignee: Shenzhen KTC Commercial Technology Co Ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2022-02-01
Anticipated expiration: 2031-06-09

Abstract

The utility model discloses a control circuit, a device and a system, which comprise a power supply unit, a switching unit and a discharging unit; the output end of the power supply unit is connected with the switching unit, the switching unit is connected with the test fixture, and the power supply unit can supply power to the test fixture through the switching unit so that the test fixture is in a test state; the input end of the discharge unit is connected with the switching unit, and the test fixture can discharge through the switching unit and the discharge unit to be in a discharge state; the switching unit is used for switching the working state of the test fixture so as to switch the test fixture between the test state and the discharge state. The utility model can not only supply power to the test fixture, but also discharge the control circuit quickly, thereby improving the test efficiency.

Description

Control circuit, device and system

Technical Field

The present invention relates to the field of electronic circuit technologies, and in particular, to a control circuit, a control device, and a control system.

Background

The test fixture is used for testing functions, power calibration, service life, performance and the like of products such as circuit boards and the like. After products such as general circuit board are produced, need test through test fixture, and test fixture generally needs external power supply, and prior art adopts the adapter as test fixture's power usually, but the adapter discharges slowly after the input power closes, operates test fixture this moment, for example takes out the circuit board, burns out the circuit board easily, and if wait that the adapter discharges completely and need longer time, leads to the efficiency of software testing to be lower.

SUMMERY OF THE UTILITY MODEL

The utility model provides a control circuit, a control device and a control system, which can supply power to a test fixture, and can quickly discharge the test fixture after the test of the test fixture is finished so as to facilitate the next test, thereby improving the test efficiency.

In a first aspect, the present invention provides a control circuit, which includes a power supply unit, a switching unit, and a discharging unit; the output end of the power supply unit is connected with the switching unit, the switching unit is connected with the test fixture, and the power supply unit can supply power to the test fixture through the switching unit so that the test fixture is in a test state; the input end of the discharge unit is connected with the switching unit, and the test fixture can discharge through the switching unit and the discharge unit to be in a discharge state; the switching unit is used for switching the working state of the test fixture so as to switch the test fixture between the test state and the discharge state.

Further, the switching unit is a double-pole double-throw switch, and the double-pole double-throw switch comprises a first contact, a second contact, a third contact, a fourth contact, a fifth contact and a sixth contact; the first contact is connected with the output end of the power supply unit, the second contact is connected with the test fixture, and the third contact is connected with the discharge unit; the fourth contact, the fifth contact and the sixth contact are all grounded.

Further, the discharge unit includes a first resistor and a second resistor; one end of the first resistor is used as the input end of the discharge unit and connected with the third contact, the other end of the first resistor is connected with one end of the second resistor, and the other end of the second resistor is used as the output end of the discharge unit and grounded.

Furthermore, the discharge unit further comprises at least one light emitting diode, wherein the anode of the light emitting diode is connected with one end of the first resistor, and the cathode of the light emitting diode is connected with one end of the second resistor.

Further, the discharge unit includes a plurality of light emitting diodes, each of which is disposed in series between the first resistor and the second resistor.

Further, the power supply unit includes a third resistor and an adapter; one end of the adapter is connected with an external power supply, the other end of the adapter is connected with one end of the third resistor, and the other end of the third resistor is used as the output end of the power supply unit and is connected with the first contact.

Furthermore, the testing fixture further comprises a fourth resistor, and the second contact is connected with the testing fixture through the fourth resistor.

In a second aspect, the present invention further provides a testing apparatus, which includes a testing fixture and the control circuit described in any one of the above.

In a third aspect, the present invention further provides a test system, which includes the external power supply and the test apparatus described above.

The control circuit, the device and the system provided by the utility model supply power to the test fixture through the power supply unit and the switching unit so that the test fixture can start to be tested when entering a test state, and then discharge the test fixture through the switching unit and the discharge unit so that electricity can be discharged through the discharge unit when the test fixture is tested, thereby facilitating the next test, and the switching unit is used for switching the working state of the test fixture so as to improve the test efficiency.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a control circuit, an apparatus and a system according to an embodiment of the present invention;

fig. 2 is a circuit diagram of a control circuit, a device and a system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a control circuit 100 according to the present invention, which can supply power and rapidly discharge power to a test fixture 200.

As shown in fig. 1, the control circuit 100 provided by the present invention includes a power supply unit 20, a switching unit 10, and a discharging unit 30; the switching unit 10 is connected to the test fixture 200, and the power supply unit 20 can supply power to the test fixture 200 through the switching unit 10 to enable the test fixture 200 to be in a test state; the input end of the discharge unit 30 is connected to the switching unit 10, and the test fixture 200 can discharge through the switching unit 10 and the discharge unit 30 to be in a discharge state; the switching unit 10 is configured to switch the working state of the test fixture 200, so that the test fixture 200 is switched between the test state and the discharge state.

Specifically, the power supply unit 20 is used for supplying power to the test fixture 200, so that the test fixture 200 can test a circuit board to be tested, the circuit board to be tested is usually placed in the test fixture 200, and the power supply unit 20 can be connected to an external power supply or can be provided with a power supply. The switching unit 10 is used for switching different circuits, and when the test fixture 200 needs to test the circuit board to be tested, the switching unit 10 switches on one end connected to the test fixture 200 through the switch, so that the power supply unit 20 supplies power to the test fixture 200, and the test fixture 200 enters a test state to start testing. After the test fixture 200 tests the circuit board to be tested, the switching unit 10 controls the switch to be disconnected from the power supply unit 20, and the connection end of the switching unit 30 is connected, so that the test fixture 200 enters a discharging state, and the voltage in the test fixture 200 can be discharged through the discharging unit 30, and finally, when the circuit board to be tested in the test fixture 200 is taken out, the circuit board to be tested cannot be burnt due to the voltage in the test fixture 200, the whole discharging process is fast and is about 180ms, so that the next test can be carried out without waiting for a long time, and the testing efficiency is improved.

As a further embodiment, referring to fig. 2, the switching unit 10 is a double pole double throw switch comprising a first contact 1, a second contact 2, a third contact 3, a fourth contact 4, a fifth contact 5 and a sixth contact 6; the first contact 1 is connected with the output end of the power supply unit 20, the second contact 2 is connected with the test fixture 200, and the third contact 3 is connected with the discharge unit 30; the fourth contact 4, the fifth contact 5 and the sixth contact 6 are all connected to ground.

The switching unit 10 may be a double-pole double-throw switch, a single-pole double-throw switch, or another switching chip. In this embodiment, the switching unit 10 is a double-pole double-throw switch, and the first contact 1 of the double-pole double-throw switch is connected to the output terminal of the power supply unit 20, the second contact 2 is connected to the test fixture 200, and the third contact 3 is connected to the discharging unit 30, so that when a test is required, the double-pole double-throw switch is switched to the first contact 1 and the second contact 2 to be conducted, so that the power supply unit 20 supplies power to the test fixture 200, and when the test is finished, the double-pole double-throw switch is switched to the second contact 2 and the third contact 3 to be conducted, so as to discharge the test fixture 200. The third contact 3, the fourth contact 4 and the fifth contact 5 are all grounded and may be connected to other circuits.

As a further example, the discharge unit 30 includes a first resistor R1 and a second resistor R2; one end of the first resistor R1 is connected to the third contact 3 as the input end of the discharge unit 30, the other end thereof is connected to one end of the second resistor R2, and the other end of the second resistor R2 is grounded as the output end of the discharge unit 30.

The discharge unit 30 may include a first resistor R1 and a second resistor R2, and the output end of the first resistor R1 and the second resistor R2 is grounded and is used for discharging the test fixture 200.

In a further embodiment, the discharge unit 30 further includes at least one light emitting diode D1, wherein an anode of the light emitting diode D1 is connected to one end of the first resistor R1, and a cathode thereof is connected to one end of the second resistor R2.

The led D1 can indicate the discharging condition of the test fixture 200, when the led D1 is in a light-emitting state, it represents that the test fixture 200 is discharging, and when the led D1 is in a light-off state, it represents that the discharging is completed, so that the discharging condition of the test fixture 200 can be accurately grasped.

As a further embodiment, the discharge unit 30 includes a plurality of light emitting diodes D1, each of the light emitting diodes D1 being disposed in series between the first resistor R1 and the second resistor R2.

Wherein, a plurality of light emitting diodes D1 may be provided to indicate the discharging condition of the test fixture 200.

As a further example, the power supply unit 20 includes a third resistor R3 and an adapter 21; one end of the adapter 21 is connected to an external power source, the other end thereof is connected to one end of the third resistor R3, and the other end of the third resistor R3 is connected to the first contact 1 as an output end of the power supply unit 20.

The adapter 21 may be connected to an external power source, and the test fixture 200 may be powered by the adapter 21, so as to adjust the voltage of the external power source to the voltage suitable for the test fixture 200.

As a further example, the second contact 2 is connected to the test fixture 200 through the fourth resistor R4.

The fourth resistor R4 is used to protect the test fixture 200 and prevent the test fixture 200 from being damaged.

The utility model also discloses a test device comprising the control circuit 100 according to any of the above embodiments.

The utility model also discloses a test system which comprises an external power supply and the reset device in any embodiment of the above embodiments.

The switching unit can be communicated with the power supply unit when the test fixture needs to be tested, so that the power supply unit supplies power to the test fixture, and the switching unit is communicated with the discharging unit when the test fixture is tested, so that the test fixture can be discharged to facilitate the next test, and the working state of the test fixture can be switched to improve the discharging efficiency, thereby improving the testing efficiency.

While the utility model has been described with reference to specific embodiments, the utility model is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the utility model. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A control circuit, comprising: the device comprises a power supply unit, a switching unit and a discharging unit;

the output end of the power supply unit is connected with the switching unit, the switching unit is connected with the test fixture, and the power supply unit can supply power to the test fixture through the switching unit so that the test fixture is in a test state;

the input end of the discharge unit is connected with the switching unit, and the test fixture can discharge through the switching unit and the discharge unit to be in a discharge state;

the switching unit is used for switching the working state of the test fixture so as to switch the test fixture between the test state and the discharge state.

2. The control circuit of claim 1, wherein the switching unit is a double pole double throw switch comprising a first contact, a second contact, a third contact, a fourth contact, a fifth contact, and a sixth contact;

the first contact is connected with the output end of the power supply unit, the second contact is used as the switching unit to be connected with the test fixture, and the third contact is connected with the discharge unit;

the fourth contact, the fifth contact and the sixth contact are all grounded.

3. The control circuit of claim 2, wherein the discharge unit includes a first resistor and a second resistor;

one end of the first resistor is used as the input end of the discharge unit and connected with the third contact, the other end of the first resistor is connected with one end of the second resistor, and the other end of the second resistor is used as the output end of the discharge unit and grounded.

4. The control circuit of claim 3, wherein the discharge unit further comprises at least one light emitting diode, an anode of the light emitting diode being connected to one end of the first resistor, and a cathode thereof being connected to one end of the second resistor.

5. The control circuit of claim 4, wherein the discharge unit includes a plurality of light emitting diodes, each of the light emitting diodes being arranged in series between the first resistor and the second resistor.

6. The control circuit of claim 3, wherein the power supply unit includes a third resistor and an adapter;

one end of the adapter is connected with an external power supply, the other end of the adapter is connected with one end of the third resistor, and the other end of the third resistor is used as the output end of the power supply unit and is connected with the first contact.

7. The control circuit of claim 2, further comprising a fourth resistor, wherein the second contact is connected to the test fixture via the fourth resistor.

8. The control circuit of claim 1, wherein the switching unit is a switching chip.

9. A test apparatus comprising a test fixture and a control circuit according to any one of claims 1 to 8.

10. A test system comprising an external power supply and a test apparatus according to claim 9.