Switching power supply insulation and voltage resistance testing device

Abstract

The utility model relates to the technical field of switching power supply testing, in particular to a switching power supply insulation and voltage resistance testing device, which comprises a base, four contact pins, a connecting frame, a first guide frame, an air cylinder, a clamping rod and a first elastic piece, the four contact pins are arranged on the base in a sliding manner, and the first guide frame is fixedly connected onto the base. A cylinder is mounted on the first guide frame, a clamping rod is mounted on a telescopic rod of the cylinder, a connecting frame is fixedly connected to the four contact pins, the connecting frame slides on the first guide frame and is sleeved with a first elastic piece, and the two ends of the first elastic piece are connected with the first guide frame and the base respectively. By starting the air cylinder, the telescopic rod of the air cylinder extends to drive the clamping rod to move upwards, so that the clamping rod is separated from the connecting frame, and the first elastic piece drives the connecting frame and the four contact pins above the connecting frame to move backwards, so that the contact pins are separated from the switching power supply, electric connection with the switching power supply is cut off, and electric shock between testing equipment and personnel caused by electric leakage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of switching power supply testing technology, and in particular to a switching power supply insulation and withstand voltage testing device. Background Technology

[0002] A switching power supply, also known as a switching power supply or a switching mode power supply, is a power supply device that provides a stable output voltage by efficiently converting electrical energy. Insulation and withstand voltage testing of switching power supplies are important steps to ensure their safety and reliability. They are designed to verify the isolation performance between the internal circuits of the device and whether the device can maintain normal operation under abnormal conditions.

[0003] Patent CN221303357U discloses a testing fixture for a switching power supply. It includes an operating table on which a switching power supply body, a mounting base, and a testing mechanism are horizontally mounted sequentially. The mounting base has multiple contacts electrically connected to the testing mechanism on its side near the switching power supply body, and a telescopic mechanism is installed between the contacts and the mounting base for retraction. When using this patent, the telescopic mechanism presses the contacts firmly against the terminals on the switching power supply body, thus connecting the switching power supply body to the power supply tester. However, this existing patent still has some shortcomings in practical use. Because it uses a telescopic mechanism to press the contacts, they cannot be quickly pulled out. During testing, if internal components of the switching power supply are damaged and leakage occurs, the current will be conducted through the contacts to the entire testing device, easily causing damage to the testing equipment and potentially causing electric shock to the test personnel.

[0004] Therefore, there is a need for a switching power supply insulation and withstand voltage testing device that can automatically disconnect electrical connections. Utility Model Content

[0005] To overcome the shortcomings of existing patents that use telescopic mechanisms to press the contacts, making them difficult to pull out quickly, and the fact that when internal components of the switching power supply are damaged and leakage occurs during testing, the current will be conducted through the contacts to the entire testing device, which can easily damage the testing equipment and cause electric shock to the test personnel, this utility model provides a switching power supply insulation and withstand voltage testing device that can automatically disconnect the electrical connection.

[0006] To address the aforementioned issues, this utility model employs the following technical solution: a switching power supply insulation and withstand voltage testing device, comprising a base and contact pins, with four contact pins slidably mounted on the base, and further comprising a connecting frame, a first guide frame, a cylinder, a locking rod, and a first elastic element. The first guide frame is fixedly connected to the base, and a cylinder is mounted on the first guide frame. A locking rod is mounted on the telescopic rod of the cylinder. The connecting frame is fixedly connected to the four contact pins, and the connecting frame slides on the first guide frame. A first elastic element is fitted onto the connecting frame, with both ends of the first elastic element connected to the first guide frame and the base, respectively. The locking rod contacts the connecting frame.

[0007] Preferably, the device also includes a control button, a support block, a push rod, a support frame, a wedge-shaped locking block, a limiting plate, a second guide frame, and a connecting rod. The control button is installed on the base, and the support block is fixedly connected to the base. The push rod is slidably mounted on the support block, and a return spring is sleeved on the push rod. The two ends of the return spring are respectively connected to the support block and the push rod. The second guide frame is fixedly connected to the base and is located above the support block. The connecting rod is fixedly connected to the locking rod and slides on the second guide frame. The support frame is fixedly connected to the support block, and a limiting plate is rotatably mounted on the support frame. The wedge-shaped locking block is slidably mounted on the support frame.

[0008] Preferably, the system also includes a third guide frame, clamps, and second elastic elements. The third guide frame is fixedly connected to the base, and two clamps are slidably arranged on the third guide frame. Two second elastic elements are sleeved on the third guide frame, and the two ends of the second elastic elements are connected to the clamps and the third guide frame, respectively.

[0009] Preferably, it also includes an insulated handle, which is fixedly connected to the clamp.

[0010] Preferably, it also includes limit blocks, with two limit blocks fixedly connected to the third guide frame.

[0011] Preferably, a buffer pad is also included, with the buffer pad embedded in the push rod.

[0012] Preferably, two limiting round blocks are fixedly connected to the clamp.

[0013] Preferably, the base, the first guide frame, and the connecting frame are made of insulating material.

[0014] Compared with the prior art, the present invention has the following technical effects: 1. By starting the cylinder, the extension rod of the cylinder extends and drives the clamping rod to move upward, so that the clamping rod is disengaged from the connecting frame. The first elastic element then drives the connecting frame and the four contact pins above it to move backward, so that the contact pins are disengaged from the switching power supply, thereby cutting off the electrical connection with the switching power supply and avoiding leakage that could cause electric shock to the test equipment and personnel.

[0015] 2. The telescopic rod drives the connecting rod to move upward and squeeze the wedge-shaped block to move outward, causing the wedge-shaped block to disengage from the limiting plate. The limiting plate then rotates and disengages from the push rod. The return spring then drives the push rod to move downward and reset, causing the push rod to press the control button. This allows the control button to cut off the power, preventing greater losses or personal injury caused by equipment failure.

[0016] 3. Place the switching power supply on the base so that it is positioned between the two clamps. Then release the clamps, and the second elastic element will move the clamps inward to fix the switching power supply in place, thereby ensuring its testing accuracy. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the base, stylus, and first elastic element of this utility model.

[0019] Figure 3 This is a three-dimensional structural diagram of the support block, push rod, and support frame of this utility model.

[0020] Figure 4 This is a three-dimensional sectional view of the support frame, wedge-shaped block, and limiting plate of this utility model.

[0021] Figure 5 This is a three-dimensional cross-sectional view of the clamping plate and the second elastic element of this utility model.

[0022] Reference numerals: 1-Base, 2-Contact pin, 3-Connecting frame, 4-First guide frame, 5-Cylinder, 6-Clamping rod, 7-First elastic element, 8-Control button, 9-Support block, 10-Push rod, 1001-Return spring, 11-Support frame, 12-Wedge-shaped clamping block, 13-Limiting plate, 14-Second guide frame, 15-Connecting rod, 16-Third guide frame, 17-Clamping plate, 18-Second elastic element, 19-Insulated pull handle, 20-Limiting block, 21-Buffer pad. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Example 1: A switching power supply insulation and withstand voltage testing device, see reference. Figures 1-3 and Figure 5 As shown, the device includes a base 1 and four styluses 2. The base 1 has four styluses 2 that are evenly spaced and slidably arranged at the front. It also includes a connecting frame 3, a first guide frame 4, a cylinder 5, a locking rod 6, and a first elastic element 7. The first guide frame 4 is fixedly connected to the top of the base 1. The cylinder 5 is bolted to the top of the first guide frame 4. The locking rod 6 is installed on the telescopic rod of the cylinder 5. The connecting frame 3 is fixedly connected to the four styluses 2. The connecting frame 3 slides on the first guide frame 4. The first elastic element 7 is sleeved on the connecting frame 3. The two ends of the first elastic element 7 are connected to the first guide frame 4 and the base 1, respectively. The locking rod 6 is in contact with the connecting frame 3. The first elastic element 7 is in a compressed state in the figure.

[0025] See Figures 1-3 and Figure 5 As shown, the base 1, the first guide frame 4 and the connecting frame 3 are made of insulating material to prevent leakage from damaging the cylinder 5.

[0026] When testing a switching power supply, first place the power supply on base 1, then connect the contact pins 2 to the test equipment using a connecting cable. Next, push the connecting frame 3 backward, compressing the first elastic element 7. As the connecting frame 3 moves, it causes the four contact pins 2 to move backward, making them contact the power supply. Simultaneously, activate cylinder 5, causing its extension rod to retract and engage the locking rod 6 to lock the connecting frame 3. If abnormal values ​​are detected during testing, indicating a leakage, activate cylinder 5 again. The extension rod of cylinder 5 extends, causing the locking rod 6 to move upward, disengaging it from the connecting frame 3. The first elastic element 7 then causes the connecting frame 3 and the four contact pins 2 above it to move backward, disengaging them from the power supply and cutting off the electrical connection. This prevents electric shock to the test equipment and personnel caused by leakage. The leaking power supply can then be dealt with using the correct handling methods.

[0027] Example 2: Based on Example 1, refer to Figure 3 and Figure 4 As shown, it also includes a control button 8, a support block 9, a push rod 10, a support frame 11, a wedge-shaped locking block 12, a limiting plate 13, a second guide frame 14, and a connecting rod 15. The control button 8 is installed on the lower right side of the base 1. The support block 9 is welded to the middle right side of the base 1. The push rod 10 is slidably mounted on the support block 9. The push rod 10 is located above the control button 8. A return spring 1001 is sleeved on the push rod 10. The two ends of the return spring 1001 are connected to the support block 9 and the push rod 10, respectively. In the figure, the return spring 1001 is a pull spring. In the extended state, a second guide frame 14 is fixedly connected to the right side of the middle part of the base 1. The second guide frame 14 is located above the support block 9. A connecting rod 15 is fixedly connected to the rear side of the locking rod 6. The connecting rod 15 slides on the second guide frame 14. A support frame 11 is fixedly connected to the top left side of the support block 9. The support frame 11 is located to the left of the push rod 10. A limit plate 13 is rotatably installed on the upper part of the support frame 11. A wedge-shaped locking block 12 is slidably installed on the upper part of the support frame 11. The wedge-shaped locking block 12 contacts the end of the connecting rod 15 and simultaneously contacts the limit plate 13.

[0028] See Figure 3 As shown, it also includes a buffer pad 21, which is embedded in the bottom of the push rod 10.

[0029] When the telescopic rod of cylinder 5 extends, it drives the connecting rod 15 to move upward and presses the wedge-shaped block 12 to move outward, causing the wedge-shaped block 12 to disengage from the limiting plate 13. The limiting plate 13 then rotates and disengages from the push rod 10. The return spring 1001 then drives the push rod 10 to move downward and reset, causing the push rod 10 to press the control button 8. This allows the control button 8 to cut off the power supply, preventing greater losses or personal injury caused by equipment failure. The buffer pad 21 can reduce the pressure between the push rod 10 and the control button 8, preventing the control button 8 from being crushed.

[0030] See Figure 1 and Figure 5 As shown, it also includes a third guide frame 16, a clamping plate 17, and a second elastic element 18. The third guide frame 16 is welded to the bottom of the base 1. The clamping plate 17 is slidably installed on both the left and right sides of the third guide frame 16. The second elastic element 18 is fitted on both the left and right sides of the third guide frame 16. The two ends of the second elastic element 18 are connected to the clamping plate 17 and the third guide frame 16, respectively.

[0031] See Figure 1 and Figure 5 As shown, it also includes an insulated handle 19, which is fixedly connected to the upper outer side of the clamp 17.

[0032] See Figure 5 As shown, it also includes limit blocks 20, and the third guide frame 16 is fixedly connected to the limit blocks 20 on both the left and right sides.

[0033] See figure and Figure 5 As shown, limit blocks are symmetrically fixed to the inner side of the clamping plate 17, which can limit the switching power supply.

[0034] Before placing the switching power supply on the base 1, pull the two clamps 17 outward using the insulating pull handle 19. The second elastic element 18 will be stretched accordingly. Then place the switching power supply on the base 1 so that the switching power supply is between the two clamps 17. Then release the clamps 17. The second elastic element 18 will then move the clamps 17 inward, thereby fixing the switching power supply and ensuring its testing accuracy. The limit block 20 can prevent the clamps 17 from detaching from the third guide frame 16.

[0035] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A switching power supply insulation and withstand voltage testing device, comprising a base (1) and contact pins (2), wherein four contact pins (2) are slidably disposed on the base (1), characterized in that, It also includes a connecting frame (3), a first guide frame (4), a cylinder (5), a locking rod (6) and a first elastic element (7). The first guide frame (4) is fixedly connected to the base (1). The cylinder (5) is installed on the first guide frame (4). The locking rod (6) is installed on the telescopic rod of the cylinder (5). The connecting frame (3) is fixedly connected to the four contact pins (2). The connecting frame (3) slides on the first guide frame (4). The first elastic element (7) is sleeved on the connecting frame (3). The two ends of the first elastic element (7) are respectively connected to the first guide frame (4) and the base (1). The locking rod (6) contacts the connecting frame (3).

2. The switching power supply insulation and withstand voltage testing device according to claim 1, characterized in that, It also includes a control button (8), a support block (9), a push rod (10), a support frame (11), a wedge-shaped locking block (12), a limiting plate (13), a second guide frame (14), and a connecting rod (15). The control button (8) is installed on the base (1), and the support block (9) is fixedly connected to the base (1). The push rod (10) is slidably installed on the support block (9), and a return spring (1001) is sleeved on the push rod (10). The two ends of the return spring (1001) are respectively connected to the support. The support block (9) and push rod (10) are connected. A second guide frame (14) is fixedly connected to the base (1). The second guide frame (14) is located above the support block (9). A connecting rod (15) is fixedly connected to the clamp rod (6). The connecting rod (15) slides on the second guide frame (14). A support frame (11) is fixedly connected to the support block (9). A limit plate (13) is rotatably set on the support frame (11). A wedge-shaped clamp (12) is slidably set on the support frame (11).

3. The switching power supply insulation and withstand voltage testing device according to claim 2, characterized in that, It also includes a third guide frame (16), a clamping plate (17), and a second elastic element (18). The third guide frame (16) is fixedly connected to the base (1). Two clamping plates (17) are slidably arranged on the third guide frame (16). Two second elastic elements (18) are sleeved on the third guide frame (16). The two ends of the second elastic elements (18) are connected to the clamping plate (17) and the third guide frame (16) respectively.

4. The switching power supply insulation and withstand voltage testing device according to claim 3, characterized in that, It also includes an insulated handle (19), which is fixedly connected to the clamp (17).

5. The switching power supply insulation and withstand voltage testing device according to claim 4, characterized in that, It also includes limit blocks (20), and two limit blocks (20) are fixedly connected on the third guide frame (16).

6. The switching power supply insulation and withstand voltage testing device according to claim 5, characterized in that, It also includes a buffer pad (21), which is embedded in the push rod (10).

7. The switching power supply insulation and withstand voltage testing device according to claim 6, characterized in that, Two limiting round blocks are fixedly connected to the clamp (17).

8. The switching power supply insulation and withstand voltage testing device according to claim 7, characterized in that, The base (1), the first guide frame (4) and the connecting frame (3) are made of insulating material.

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