Insulation voltage test fixture for photoelectric coupler with straight pins

Abstract

The utility model relates to a kind of insulation withstand voltage test fixture of straight pin photoelectric coupler;The insulation withstand voltage test fixture of straight pin photoelectric coupler includes test seat, connecting electric wire and buckle box;Test seat includes insulating seat plate and parallelly arranged power supply frame;Power supply frame is provided with the support vertical plate of vertical arrangement;The straight pin of photoelectric coupler is according to input end, output end respectively is placed on support vertical plate top end;Power supply frame is fixed above insulating seat plate;Buckle box is buckled above test seat;Connecting electric wire and power supply frame one-to-one correspondence, end portion is connected with insulation withstand voltage tester.The utility model's support vertical plate supports the straight pin of photoelectric coupler, and power supply carries out insulation withstand voltage test;Buckle box and insulating seat plate carry out insulation isolation to power supply frame, protect personnel safety.

Description

Technical Field

[0001] This utility model relates to the technical field of insulation withstand voltage testing of optocouplers, and in particular to an insulation withstand voltage testing fixture for a straight-pin optocoupler. Background Technology

[0002] For optocouplers, insulation withstand voltage testing assesses the insulation strength and electrical isolation safety between the input and output terminals. Generally, insulation withstand voltage testing involves applying a high voltage exceeding the rated voltage to the input and output terminals of the optocoupler and maintaining it for a period of time, observing whether the optocoupler experiences breakdown or leakage during this period. The manufacturing process of optocouplers is as follows: die bonding → sintering → wire bonding → silicone curing → encapsulation → electroplating → molding → insulation withstand voltage testing. As disclosed in the invention patent CN102723321B, "An Optocoupler Lead Frame and Optocoupler," in the encapsulation process, the inner epoxy resin layer 5 and the outer epoxy resin layer 6 encapsulate the lead frame unit 1, and the optocoupler leads are in a straight state. The molding process involves bending the straight leads to form bent leads for easier installation of the optocoupler. Existing insulation withstand voltage testing fixtures for optocouplers are mostly suitable for testing the insulation withstand voltage of optocouplers with bent leads and are primarily used for pre-shipment sampling inspection. Each process's equipment is capable of self-inspecting the production quality of the optocouplers. Sampling inspection is to prevent problems from arising during equipment self-inspection. However, from the electroplating process to the molding process, there is a lack of insulation withstand voltage testing fixtures for sampling inspection of optocouplers, thus hindering the early detection of quality issues. Utility Model Content

[0003] The purpose of this invention is to solve the above problems and provide an insulation withstand voltage test fixture for a straight-pin optocoupler.

[0004] The technical solution of this utility model is as follows: An insulation withstand voltage test fixture for a straight-pin optocoupler includes a test base, connecting wires, and a buckle box; the test base includes an insulating base plate and a power-conducting frame arranged side by side; the power-conducting frame is provided with a vertically arranged support plate; the straight pins of the optocoupler are respectively placed on the top of the support plate according to the input end and the output end; the power-conducting frame is energized to perform an insulation withstand voltage test on the optocoupler; the power-conducting frame is fixed above the insulating base plate to insulate the power-conducting frame from the outside; the buckle box is fastened above the test base to prevent accidental contact with the energized power-conducting frame; the connecting wires correspond one-to-one with the power-conducting frame, and their ends are connected to the insulation withstand voltage tester to apply voltage to the power-conducting frame.

[0005] Preferably, the power supply frame also includes a connecting plate integrated with the supporting vertical plate; the supporting vertical plate is stably supported; the insulation withstand voltage test fixture for the straight-pin optocoupler also includes a connecting screw; the insulating base plate is provided with a threaded blind hole; the connecting screw passes through the connecting plate and the threaded blind hole for threaded connection; the power supply frame and the insulating base plate are detachably connected, which facilitates the replacement of the power supply frame.

[0006] Furthermore, the connecting screws are evenly distributed along the length of the power supply frame to improve the connection strength between the power supply frame and the insulating base plate.

[0007] Preferably, the connecting wire is equipped with a wire clamp; the insulation withstand voltage test fixture for the straight-pin optocoupler also includes a connecting screw; the node screw passes through the wire clamp and connects to the power supply frame; the wire clamp and the power supply frame are detachably connected for easy maintenance and replacement.

[0008] Preferably, the end of the buckle box is provided with a wire passage hole corresponding to the connecting wire, so as to allow the connecting wire to pass through.

[0009] Furthermore, the wire hole extends through the bottom edge of the junction box to prevent moving the junction box from pulling on the connecting wires.

[0010] Furthermore, the cover is made of transparent material, allowing direct observation of the optocoupler's status from the outside.

[0011] Furthermore, the insulation withstand voltage test fixture for the straight-pin optocoupler also includes a base plate; the top of the base plate is glued to the bottom of the insulating base plate; the buckle box fits into the top of the base plate, which can increase the stability of the buckle box when it is fastened to the outside of the power supply frame.

[0012] Furthermore, the insulation withstand voltage test fixture for the straight-pin optocoupler also includes a hinge; the fixed end of the hinge is connected to the base plate; the movable end of the hinge is connected to the side of the snap-fit ​​box; the snap-fit ​​box forms a flip-top structure, which increases the stability of the snap-fit ​​box when it is snapped onto the power supply frame and also prevents the snap-fit ​​box from being lost.

[0013] Furthermore, the insulation withstand voltage test fixture for the straight-pin optocoupler also includes a micro switch; the micro switch is located on the lower edge of the opposite side of the latch box and the hinge; the contact head of the micro switch extends beyond the bottom surface of the latch box; when the latch box is fastened to the base plate, the micro switch is triggered, indicating that the power supply frame is in an isolated state, thus enabling safe insulation withstand voltage testing.

[0014] Furthermore, the micro switch is located on the inner wall of the box to prevent external damage and improve its service life.

[0015] The beneficial effects of this utility model are as follows: The insulation withstand voltage test fixture for straight-pin optocouplers of this utility model has the following advantages: (1) The supporting vertical plate of this utility model supports the straight pin of the optocoupler and conducts insulation withstand voltage test when energized; the buckle box and the insulating base plate provide insulation isolation for the power supply frame to protect personnel safety; (2) The buckle box of this utility model forms a flip-top structure, which increases the stability of the buckle box when it is fastened to the outside of the power supply frame and also avoids the loss of the buckle box. Attached Figure Description

[0016] Figure 1 This is a bottom partial sectional view of the insulation withstand voltage test fixture for the straight-pin optocoupler of this utility model; Figure 2 yes Figure 1 A magnified view of the I-shaped image; Figure 3 yes Figure 1 II magnified view; Figure 4 This is a three-dimensional model of the insulation withstand voltage test fixture for a straight-pin optocoupler of this utility model. Figure 1 ; Figure 5 yes Figure 4 III magnified view; Figure 6 This is a three-dimensional model of the insulation withstand voltage test fixture for a straight-pin optocoupler of this utility model. Figure 2 ; Figure 7 This is the control circuit diagram of the insulation withstand voltage test fixture for the straight-pin optocoupler in Embodiment 2; In the diagram: 0. Optocoupler, 11. Insulating base plate, 111. Threaded blind hole, 121. Supporting vertical plate, 122. Connecting plate, 2. Connecting wire, 21. Wire clip, 3. Snap-on box, 31. Wire through hole, 4. Connecting screw, 5. Electrical connection screw, 6. Base plate, 7. Hinge, 8. Micro switch, 9. Mounting screw. Detailed Implementation

[0017] Example 1: See Figure 1-6 An insulation withstand voltage test fixture for a straight-pin optocoupler includes a test base, connecting wires 2, and a retaining box 3. The test base includes an insulating base plate 11 and a power-conducting frame arranged side by side. The power-conducting frame has a vertically arranged support plate 121. The straight pins of the optocoupler 0 are placed on the top of the support plate 121 according to their input and output ends. The power-conducting frame is energized to perform an insulation withstand voltage test on the optocoupler 0. The power-conducting frame is fixed above the insulating base plate 11 to insulate it from the outside. The retaining box 3 is fastened above the test base to prevent accidental contact with the energized power-conducting frame. The connecting wires 2 correspond one-to-one with the power-conducting frame, and their ends are connected to the insulation withstand voltage tester to apply voltage to the power-conducting frame. In this embodiment, the insulation withstand voltage tester is the KIKUSUI brand TOS9200S model.

[0018] Compared with the prior art, the supporting vertical plate 121 of this utility model supports the straight pin of the optocoupler 0 and conducts insulation withstand voltage test when energized; the buckle box 3 and the insulating base plate 11 provide insulation isolation for the power supply frame, protecting personnel safety.

[0019] The power supply frame also includes a connecting plate 122 integrated with the supporting vertical plate 121; the supporting vertical plate 121 is stably supported; the insulation withstand voltage test fixture of the straight-pin optocoupler also includes a connecting screw 4; the insulating base plate 11 is provided with a threaded blind hole 111; the connecting screw 4 passes through the connecting plate 122 and is threadedly connected to the threaded blind hole 111; the power supply frame and the insulating base plate 11 are detachably connected, which facilitates the replacement of the power supply frame.

[0020] The connecting screws 4 are evenly distributed along the length of the power supply frame to improve the connection strength between the power supply frame and the insulating base plate 11.

[0021] The connecting wire 2 is equipped with a wire clip 21; the insulation withstand voltage test fixture for the straight-pin optocoupler also includes a connecting screw 5; the node screw passes through the wire clip 21 and connects to the power supply frame; the wire clip 21 and the power supply frame are detachably connected for easy maintenance and replacement.

[0022] The end of the buckle box 3 is provided with a wire passage hole 31 corresponding to the connecting wire 2, so as to allow the connecting wire 2 to pass through.

[0023] The wire hole 31 passes through the lower edge of the buckle box 3 to prevent the connecting wire 2 from being pulled when the buckle box 3 is moved.

[0024] The clasp 3 is made of transparent material, allowing direct observation of the state of the optocoupler 0 from the outside.

[0025] The insulation withstand voltage test fixture for the straight-pin optocoupler also includes a base plate 6; the top of the base plate 6 is glued to the bottom of the insulating base plate 11; the buckle box 3 fits with the top of the base plate 6, which can increase the stability of the buckle box 3 when it is fastened to the outside of the power supply frame.

[0026] The insulation withstand voltage test fixture for the straight-pin optocoupler also includes a hinge 7; the fixed end of the hinge 7 is connected to the base plate 6; the movable end of the hinge 7 is connected to the side of the snap box 3; the snap box 3 forms a flip-top structure, which increases the stability of the snap box 3 when it is snapped onto the power supply frame and also prevents the snap box 3 from being lost.

[0027] Several hinges 7 are arranged along the length of the snap box 3 to improve the connection strength between the snap box 3 and the base plate 6. In this embodiment, there are 3 hinges 7.

[0028] The working principle of this embodiment is as follows: The supporting vertical plate 121 supports the straight pins of the optocoupler 0 and performs an insulation withstand voltage test when energized; the cover box 3 and the insulating base plate 11 provide insulation isolation for the power supply frame, protecting personnel safety. The connecting plate 122 provides stable support for the supporting vertical plate 121. The cover box 3 is made of transparent material, allowing direct observation of the state of the optocoupler 0 from the outside. The cover box 3 forms a flip-top structure, increasing the stability of the cover box 3 when fastened to the power supply frame and preventing the cover box 3 from being lost.

[0029] Example 2: See Figure 7 Example 2 is basically the same as Example 1, and the similarities will not be repeated. The difference is that the insulation withstand voltage test fixture for the straight-pin optocoupler also includes a micro switch 8. The micro switch 8 is located on the lower edge of the opposite side of the buckle box 3 and the hinge 7. The contact head of the micro switch 8 extends beyond the bottom surface of the buckle box 3. When the buckle box 3 is fastened to the base plate 6, the micro switch 8 is triggered, indicating that the power supply frame is in an isolated state, so that the insulation withstand voltage test can be safely performed.

[0030] The micro switch 8 is installed on the inner wall of the box 3 to prevent external damage to the micro switch 8 and to improve the service life of the micro switch 8.

[0031] The signal line of the micro switch 8 passes through the wire hole 31.

[0032] The insulation withstand voltage test fixture for the straight-pin optocoupler also includes a mounting screw 9; the mounting screw 9 mounts the micro switch 8 onto the snap box 3.

[0033] The opening and closing of microswitch 8 is related to the power supply from the insulation withstand voltage tester to the power supply rack. There are many ways to link the two; to clearly illustrate the relationship between microswitch 8 and the power supply from the insulation withstand voltage tester to the power supply rack, one method will be described. See [link to documentation]. Figure 7 On the left, the insulation withstand voltage tester is connected to the power supply frame arranged side by side via two connecting wires 2; one of the connecting wires 2 is equipped with a normally open switch for relay KM; on the right, a micro switch 8 is connected in series with relay KM, and its two ends are connected to the positive and negative terminals of the low-voltage circuit, respectively. The normally open switch of relay KM is hidden inside the insulation withstand voltage tester.

[0034] When the latch box 3 is fastened to the outside of the insulating base plate 11, the contact head of the micro switch 8 is pressed against the base plate 6, causing the micro switch 8 on the right side to be triggered and closed; the low-voltage circuit supplies power to the relay KM. The normally open switch of the relay KM on the left side is in the closed state, and the insulation withstand voltage tester supplies power to the power supply frame to perform the insulation withstand voltage test.

[0035] When the latch box 3 is lifted, the contact head of the micro switch 8 automatically pops up, preventing the right-side micro switch 8 from being triggered; relay KM is de-energized. The normally open switch of the left-side relay KM is in the open state; the insulation withstand voltage tester cannot energize the power supply frame.

Claims

1. A test fixture for the insulation withstand voltage of a straight-pin optocoupler, characterized in that, The test fixture includes a test base, connecting wires, and a mounting box. The test base includes an insulating base plate and a power supply frame arranged side by side. The power supply frame has a vertically arranged support plate. The straight pins of the optocoupler are placed on the top of the support plate according to their input and output ends. The power supply frame is fixed above the insulating base plate. The mounting box is fastened above the test base. The connecting wires correspond one-to-one with the power supply frame, and their ends are connected to the insulation withstand voltage tester.

2. The insulation withstand voltage test fixture for a straight-pin optocoupler according to claim 1, characterized in that: The power supply frame also includes a connecting plate integrated with the supporting vertical plate; the insulation withstand voltage test fixture for the straight-pin optocoupler also includes a connecting screw; the insulating base plate is provided with a threaded blind hole; the connecting screw passes through the connecting plate and is threadedly connected to the threaded blind hole.

3. The insulation withstand voltage test fixture for a straight-pin optocoupler according to claim 2, characterized in that: The connecting screws are evenly distributed along the length of the power supply frame.

4. The insulation withstand voltage test fixture for a straight-pin optocoupler according to claim 1, characterized in that: The connecting wire is equipped with a wire clamp; the insulation withstand voltage test fixture for the straight-pin optocoupler also includes a connecting screw; the node screw passes through the wire clamp and connects to the power supply frame.

5. The insulation withstand voltage test fixture for a straight-pin optocoupler according to claim 1, characterized in that: The end of the buckle box is provided with a wire passage hole corresponding to the connecting wire.

6. The insulation withstand voltage test fixture for a straight-pin optocoupler according to claim 5, characterized in that: The wire hole passes through the bottom edge of the buckle box.

7. The insulation withstand voltage test fixture for a straight-pin optocoupler according to claim 6, characterized in that: It also includes a base plate; the top of the base plate is glued to the bottom of the insulating base plate; and the buckle box fits into the top of the base plate.

8. The insulation withstand voltage test fixture for a straight-pin optocoupler according to claim 7, characterized in that: It also includes hinges; the fixed end of the hinge connects to the base plate; the movable end of the hinge connects to the side of the snap box.

9. The insulation withstand voltage test fixture for a straight-pin optocoupler according to claim 8, characterized in that: It also includes a micro switch; the micro switch is located on the lower edge of the opposite side of the latch box and the hinge; the contact head of the micro switch extends beyond the bottom surface of the latch box.

10. The insulation withstand voltage test fixture for a straight-pin optocoupler according to claim 9, characterized in that: The micro switch is located on the inner wall of the box.

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