Rectifying and testing device suitable for rectifying and filtering of electronic circuit
By designing a rectification and testing device for electronic circuits, using shielded shells and component tooling, the circuit structure is flexibly constructed, and the problem of frequent disassembly and assembly of medical device products in electromagnetic compatibility performance detection is solved, improving rectification efficiency and enhancing Electromagnetic shielding performance.
Patent Information
- Application Number
- CN202420721105.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-09
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-04-09
AI Technical Summary
In the prior art, medical device products need to frequently disassemble and assemble the shell for internal circuit structure adjustment in electromagnetic compatibility performance detection. The process is cumbersome and may lead to degradation of shielding performance, and cannot flexibly and efficiently meet the standard requirements.
A rectification and testing device suitable for electronic circuit rectification and filtering is designed, including shielded shell, tooling base and component tooling. By fixing components in the device and connecting them with external wires, the circuit structure is flexibly constructed, instead of the internal of the sample being tested. Circuit to improve the flexibility and convenience of rectification and testing.
It realizes flexible adjustment of component parameters and electromagnetic shielding, reduces frequent disassembly and assembly of the samples to be tested, improves rectification efficiency, and reduces electromagnetic interference through grounding terminals, enhancing the anti-interference ability of the equipment.
Smart Images
Figure CN222299746U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electronic information, and in particular relates to a rectification and testing device suitable for rectification and filtering of electronic circuits. Background Art
[0002] Medical devices need to go through a series of tests before they are put on the market, including performance, electrical safety, and electromagnetic compatibility. The quality of electromagnetic compatibility plays a decisive role in whether the equipment can operate stably and long-term. Electromagnetic compatibility testing items include conducted emission, radiated emission, harmonic distortion, voltage fluctuation and flicker, electrostatic discharge, radio frequency electromagnetic field radiation immunity, electrical fast transient pulse group, surge, radio frequency field induced conducted disturbance immunity, voltage sag, short interruption and voltage change on the power supply input line, power frequency magnetic field, etc.
[0003] In the detection of the above items, the tested samples may not be able to directly meet the standard requirements, and the internal circuit structure needs to be rectified. For example, in the test of electrical fast transient pulse group, the transient pulse has a short rise time, repetitive appearance, and low energy. For products that fail the test, it is necessary to use filter capacitors, inductors, resistors and other electronic components to form a filter circuit to reduce the impact of the pulse group on the product.
[0004] In the prior art, it is usually necessary to disassemble the outer shell of the sample under test and change the circuit structure of the internal circuit board. However, the internal circuit board of the sample under test is usually highly integrated, and the change is relatively complicated. Secondly, in order to ensure electromagnetic shielding or meet other experimental requirements, the outer shell of the sample under test needs to be restored after the change. If the performance of the sample under test still cannot meet the standard requirements after one change, it is necessary to repeat the above steps and adjust the component parameters. The whole process is relatively cumbersome, and frequent disassembly and assembly may cause the shielding performance of the sample housing to deteriorate. Utility Model Content
[0005] In view of the shortcomings of the prior art, the utility model proposes a rectification test device suitable for rectification and filtering of electronic circuits. The device is used to build different functional circuits to replace the frequent changes to the internal circuit of the sample during the test process, thereby improving the flexibility and convenience of the rectification test process.
[0006] A rectification and testing device suitable for rectification and filtering of electronic circuits comprises a shielding shell, a tooling base and a component tooling.
[0007] The shielding shell is made of metal material and includes a box body with an opening at the top and a sealing cover, wherein the sealing cover is arranged on the top of the box body and is detachably connected to the box body to form a closed space inside the box body. A grounding terminal is fixed on the outer surface of the shielding shell, and a plurality of through holes are arranged on both sides of the shielding shell.
[0008] The tooling base is made of insulating material and is fixed in the box. The component tooling is evenly fixed on the tooling base.
[0009] The component fixture includes a component slot and a wiring terminal, wherein the component slot and the wiring terminal are electrically connected, the component slot is used to fix the pins of the component, and the wiring terminal is used to fix the external wire. Different component fixtures are not directly electrically connected.
[0010] Preferably, slide rails are provided on both sides of the top of the box body, and the sealing cover is slidably connected to the box body via the slide rails.
[0011] Preferably, one side of the top of the box body is hinged to one side of the sealing cover.
[0012] Preferably, the shielding shell is a two-layer structure, the inner layer is made of metal material, and the outer layer is made of insulating material, and the grounding terminal is fixed to the inner layer of the shielding shell.
[0013] Preferably, the ground terminal is made of metal material.
[0014] When the sample under test needs to be rectified, first determine the circuit structure that needs to be modified, then select the components needed for the circuit structure, fix the components in different component slots, and then connect different wiring terminals through external wires so that the components inside the shielding shell form the required circuit structure, and then lead the leads at both ends of the circuit from the through holes on both sides of the shielding shell and connect them to the circuit board of the sample under test, so that the circuit structure inside replaces the original circuit on the circuit board of the sample under test. Finally, cover the sealing cover, use the lead to connect the ground terminal on the shielding shell to the ground, ground the entire device, and start testing.
[0015] The utility model has the following beneficial effects:
[0016] 1. Fix the components on the component fixture in the device and connect them with external wires. The circuit structure and component parameters can be flexibly changed without frequent disassembly and assembly of the tested samples, thus improving rectification efficiency.
[0017] 2. The metal shielding shell can ensure a good electromagnetic shielding effect, so that the functional circuit inside the device is not interfered by the external environment, and ensure that the internal circuit will not interfere with the test results during the test process.
[0018] 3. The grounding terminal can provide a low-impedance path to allow interference signals to flow into the earth through the grounding terminal, reducing the electromagnetic interference of the device to other electronic devices, while also improving the device's own anti-interference ability. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the appearance of the rectification test device in the embodiment;
[0020] Figure 2 is an internal schematic diagram of a rectification test device in an embodiment;
[0021] Figure 3 A schematic diagram of a circuit constructed in the embodiment;
[0022] Figure 4 Schematic diagram of the use of the rectification test device in the embodiment. DETAILED DESCRIPTION
[0023] 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 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 present invention. It should be understood that in the description of the utility model, the orientation or position relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", "side" and the like are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a connection between the two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0024] like Figure 1 , 2 As shown, the device includes a shielding shell, a tooling base 7 and a component tooling.
[0025] The shielding shell comprises a box body 2 with an opening at the top and a sealing cover 1, wherein the sealing cover 1 is arranged on the top of the box body 2 and is detachably connected to the box body 2. The box body 2 and the sealing cover 1 are both two-layer structures, wherein the inner layer 6 is made of metal material and the outer layer 5 is made of insulating material. A plurality of through holes 3 are arranged on both sides of the shielding shell, which are connected to the inside of the shielding shell. A grounding terminal 4 is fixed to the inner layer 6 and passes through the outer layer 5.
[0026] The tool base 7 is made of insulating material and is fixed in the box body 2. A plurality of component tools are evenly fixed on the tool base 7.
[0027] The component fixture includes a component slot 9 and a wiring terminal 8, wherein the component slot 9 and the wiring terminal 8 are electrically connected, the component slot 9 is used to fix the pins of the component, and the wiring terminal 8 is used to fix the external wire. Different component fixtures are not directly electrically connected.
[0028] Figure 3 The figure shows a first-order passive bandpass filter circuit used in the rectification process of the project, which allows the working current between the upper and lower limit frequencies to pass through the output end of the filter, including 3 inductors and 3 capacitors. First, select capacitors and inductors with appropriate parameters and fix them in different component slots 9 respectively, and then connect different wiring terminals 8 through external wires, so that the capacitors and inductors in different component slots 9 form the following Figure 3 The circuit structure shown in FIG. Then, the leads at both ends of the circuit are led out from the through holes 3 on both sides of the shielding shell and connected to the circuit board of the sample under test, so that the circuit structure replaces the original circuit on the circuit board of the sample under test. Finally, the grounding terminal 4 on the shielding shell is connected to the ground using the lead wire, and the entire device is grounded before starting the test. Figure 4 As shown. If the sample under test still fails to meet the standard requirements after one test, the parameters of the required components can be recalculated and replaced before starting the next test. In this way, even if the circuit structure needs to be changed multiple times during the rectification process, the sample under test only needs to be disassembled and assembled once, which can greatly improve the rectification efficiency and minimize the damage to the shell of the sample under test.
Claims
1. A rectification and testing device suitable for rectification and filtering of electronic circuits, characterized in that: It comprises a shielding shell, a tooling base (7) and a component tooling; The shielding shell is made of metal material and comprises a box body (2) with an opening at the top and a sealing cover (1); the sealing cover (1) is arranged on the top of the box body (2) and is detachably connected to the box body (2) so that a closed space is formed inside the box body (2); a grounding terminal (4) is fixed on the outer surface of the shielding shell, and a plurality of through holes (3) are arranged on both sides of the shielding shell; The tooling base (7) is made of insulating material and is fixed in the box (2); the component tooling is evenly fixed on the tooling base (7); The component tooling comprises a component slot (9) and a wiring terminal (8), wherein the component slot (9) and the wiring terminal (8) are electrically connected, the component slot (9) is used to fix the pins of the component, and the wiring terminal (8) is used to fix the external wire; and different component tools are not directly electrically connected.
2. A rectification and testing device suitable for rectification and filtering of electronic circuits as claimed in claim 1, characterized in that: Slide rails are arranged on both sides of the top of the box body (2), and the sealing cover (1) is slidably connected to the box body (2) via the slide rails.
3. A rectification and testing device suitable for rectification and filtering of electronic circuits as claimed in claim 1, characterized in that: One side of the top of the box body (2) is hinged to one side of the sealing cover (1).
4. A rectification and testing device suitable for rectification and filtering of electronic circuits as claimed in claim 1, characterized in that: The shielding shell is a two-layer structure, the inner layer (6) is made of metal material, the outer layer (5) is made of insulating material, and the grounding terminal (4) is fixed to the inner layer (6) of the shielding shell.
5. A rectification and testing device suitable for rectification and filtering of electronic circuits as claimed in claim 1, characterized in that: The grounding terminal (4) is made of metal material.