Universal test frame for function test of circuit board of intelligent electric energy meter

Abstract

The invention discloses an intelligent ammeter circuit board function test universal test frame, which comprises a main body unit and a mounting unit, and is characterized in that the main body unit comprises a frame body, a test cavity is formed in the frame body, a moving plate is arranged in the test cavity, four guide rods are fixed in the test cavity, the guide rods penetrate through the moving plate, and the moving plate is in sliding fit outside the guide rods; a hydraulic cylinder is installed on the inner wall of the top of the testing cavity, the extension end of the hydraulic cylinder is fixed to a movable plate, multiple connecting columns are fixed to the bottom of the movable plate, and needle bases are fixed to the bottoms of the connecting columns. The circuit board of the intelligent electric energy meter is placed in the n-shaped plate, then the stand column is rotated to drive the disc and the protruding block to rotate, when the protruding block rotates to coincide with the groove, the pressing plate, the vertical rectangular rod and the abutting plate are driven to move upwards under the resilience force of the elastic piece, and the abutting plate clamps the circuit board of the intelligent electric energy meter between the abutting plate and the n-shaped plate. Namely, the four corners of the circuit board of the intelligent electric energy meter are synchronously fixed, so that the circuit board of the intelligent electric energy meter can be tested.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent electric energy meter circuit board test stands, in particular to a universal test stand for function testing of an intelligent electric energy meter circuit board. Background Art

[0002] The universal test stand for electric energy meter circuit boards is a device used to detect the functional integrity and electrical performance of electric energy meter circuit boards. It can measure parameters such as voltage, current, resistance, capacitance, inductance, etc., and detect whether the components on the circuit board are working properly and whether the line connections are correct. It simulates various situations of the electric energy meter in actual use, and conducts a comprehensive test of the metering, display, communication and other functions of the electric energy meter to ensure that the electric energy meter can accurately measure electric energy, correctly display data and realize the communication function with external devices.

[0003] In order to adapt to market demand, the existing smart energy meter circuit boards mainly include domestic and overseas markets. Due to different requirements in various regions and countries, the types and specifications of circuit boards are diverse. The current test stand usually corresponds to one type of smart energy meter circuit board, resulting in different types of boards requiring multiple corresponding test stands, resulting in a waste of resources. In addition, when the test stand tests the smart energy meter circuit board, it is necessary to clamp and fix the smart energy meter circuit board. When fixing the smart energy meter circuit board, it is usually necessary to fix the four corners of the smart energy meter circuit board separately each time, and the four corners of the smart energy meter circuit board cannot be fixed synchronously, resulting in very troublesome fixing and disassembly of the smart energy meter circuit board. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a universal test stand for functional testing of a circuit board of an intelligent energy meter. The technical problem to be solved is that the current test stand usually corresponds to one test stand for the board type of a circuit board of an intelligent energy meter, resulting in different types of boards requiring multiple corresponding test stands, resulting in a waste of resources, and when the test stand tests the circuit board of an intelligent energy meter, it is necessary to clamp and fix the circuit board of an intelligent energy meter, and when fixing the circuit board of an intelligent energy meter, it is usually necessary to fix the four corners of the circuit board of an intelligent energy meter separately each time, and the four corners of the circuit board of an intelligent energy meter cannot be fixed synchronously, resulting in that the fixing and disassembly of the circuit board of an intelligent energy meter is very troublesome.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A universal test stand for functional testing of an intelligent electricity meter circuit board, which includes a main body unit and an installation unit. The main body unit includes a frame body. A test cavity is opened in the frame body. A moving plate is arranged in the test cavity. Four guide rods are fixed in the test cavity. The guide rods penetrate through the moving plate, and the moving plate is slidably matched outside the guide rods. A hydraulic cylinder is installed on the inner wall of the top of the test cavity. The extending end of the hydraulic cylinder is fixed to the moving plate. A plurality of connecting columns are fixed to the bottom of the moving plate. A needle base is fixed to the bottom of the connecting column. A plurality of test probes are installed on the bottom of the needle base. The installation unit includes an installation seat. The bottom of the installation seat is attached to the inner wall of the bottom of the test cavity. A notch is opened in the bottom groove wall of the test cavity. A threaded rod is rotatably connected in the notch. A first threaded sleeve is fixed to the bottom of the installation seat. The first threaded sleeve is slidably matched in the notch. The threaded rod penetrates through the first threaded sleeve and is threadedly connected to the first threaded sleeve. Two rectangular frames are arranged on the installation seat. Two rectangular support plates are slidably connected in the rectangular frames. A primary driving component for driving the two rectangular frames to approach or move away from each other is arranged in the installation seat. A secondary driving component for driving the two rectangular support plates to approach or move away from each other is arranged in the rectangular frame. A clamping component for clamping the intelligent electricity meter circuit board is arranged on one side of the rectangular support plate. A control mechanism for synchronously operating the clamping components on the four rectangular support plates is arranged on the installation seat.

[0007] As a further optimized solution of the present invention, the primary driving component includes a second threaded sleeve fixed to the bottom of the rectangular frame. A first stroke groove for the second threaded sleeve to slide is opened in the installation seat. A first bidirectional screw is rotatably connected in the first stroke groove, and the first bidirectional screw penetrates through the second threaded sleeve and is threadedly connected to the second threaded sleeve.

[0008] As a further optimized solution of the present invention, the secondary driving component includes a second bidirectional screw rotatably arranged in the rectangular frame. The second bidirectional screw penetrates through the rectangular support plate and is threadedly connected to the rectangular support plate.

[0009] As a further optimized solution of the present invention, the two threaded segments of the first bidirectional screw have opposite thread directions, and the two second threaded sleeves are respectively located on different threaded segments of the first bidirectional screw. The two threaded segments of the second bidirectional screw have opposite thread directions, and the two rectangular support plates are respectively located on different threaded segments of the second bidirectional screw.

[0010] As a further optimized solution of the present invention, the clamping component includes a U-shaped plate fixed to one side of the rectangular support plate. A抵触板 (resistant plate) is arranged in the U-shaped plate. A vertical rectangular rod is fixed to the bottom of the resistant plate. The vertical rectangular rod penetrates through the U-shaped plate and slides inside the U-shaped plate. A horizontal rectangular rod is fixed to the bottom of one of the vertical rectangular rods on the same rectangular frame, and a rectangular cylinder is fixed to the bottom of the other vertical rectangular rod. The horizontal rectangular rod is slidably matched inside the rectangular cylinder.

[0011] As a further optimized solution of the present invention, second stroke grooves are provided on both sides of the rectangular cylinder. One end of the horizontal rectangular rod is fixed with two convex columns, and the two convex columns are respectively slidably fitted in the corresponding second stroke grooves. A sliding sleeve is fixed at the bottom of the rectangular cylinder.

[0012] As a further optimized solution of the present invention, the control mechanism includes a pressure plate. The pressure plate penetrates through the sliding sleeve, and the sliding sleeve is slidably fitted outside the pressure plate. Annular sleeves are fixed at both ends of the pressure plate. Two cylindrical rods are fixed at the top of the mounting seat, and the annular sleeves are slidably fitted outside the corresponding cylindrical rods.

[0013] As a further optimized solution of the present invention, a circular baffle is fixed at the top of the cylindrical rod. An elastic member is sleeved outside the cylindrical rod. One end of the elastic member abuts against the annular sleeve, and the other end of the elastic member abuts against the mounting seat.

[0014] As a further optimized solution of the present invention, a column is rotatably connected to the top of the mounting seat. A disc is fixed at the top of the column. Two convex blocks are correspondingly fixed on the outside of the disc. A circular hole is provided in the pressure plate, and two grooves are symmetrically provided on the inner wall of the circular hole. The disc can penetrate through the circular hole, and the convex blocks can penetrate through the grooves.

[0015] As a further optimized solution of the present invention, the outer diameter of the circular baffle is larger than the inner diameter of the annular sleeve, and the farthest distance between the two convex blocks is greater than the diameter of the circular hole.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1: Place the intelligent electricity meter circuit board into the U-shaped plate, and then rotate the column to drive the disc and the convex blocks to rotate. When the convex blocks rotate to coincide with the grooves, the elastic member drives the pressure plate, the vertical rectangular rod, and the抵触 plate to move upward under the resilience force, so that the抵触 plate clamps the intelligent electricity meter circuit board between the抵触 plate and the U-shaped plate, that is, the four corners of the intelligent electricity meter circuit board are fixed synchronously, and the intelligent electricity meter circuit board can be tested.

[0018] 2: Rotate the first bidirectional screw to drive the two second threaded sleeves to move. When the second threaded sleeves move, they drive the rectangular frame to move. Then rotate the second bidirectional screw to drive the two rectangular support plates to move, that is, adjust the positions of the rectangular support plates, so that the clamping assembly can clamp and fix the intelligent electricity meter circuit boards of different size types, which is convenient for testing the intelligent electricity meter circuit boards of different size types. During this process, when the rectangular frame moves, the sliding sleeve slides on the outside of the pressing plate, and when the rectangular support plate moves, the horizontal rectangular rod slides in the rectangular cylinder. After the position of the rectangular support plate is adjusted, when the pressing plate moves downward again, it can still drive the contact plates in the four C-shaped plates to move downward synchronously. That is, for the rectangular support plate after the position adjustment, the clamping assembly at its top can still clamp and fix the four corners of the intelligent electricity meter circuit board synchronously. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a universal test rack for functional testing of an intelligent electricity meter circuit board provided by the present invention;

[0020] Figure 2 is a schematic partial sectional structural diagram of a universal test rack for functional testing of an intelligent electricity meter circuit board provided by the present invention;

[0021] Figure 3 is a schematic partial structural diagram of a universal test rack for functional testing of an intelligent electricity meter circuit board provided by the present invention;

[0022] Figure 4 is a schematic structural diagram of a clamping assembly provided by the present invention;

[0023] Figure 5 provided by the present invention Figure 4 is a schematic structural diagram of the position A in

[0024] Figure 6 is a schematic structural diagram of another perspective of the installation unit provided by the present invention;

[0025] Figure 7 provided by the present invention Figure 6 is a schematic structural diagram of the position B in

[0026] Description of the drawings: 100, main unit; 101, frame; 102, test chamber; 103, guide rod; 104, moving plate; 105, hydraulic cylinder; 106, needle seat; 107, connecting column; 108, test probe; 200, mounting unit; 201, mounting seat; 202, notch; 203, threaded rod; 204, first threaded sleeve; 205, rectangular frame; 206, rectangular support plate; 207, first stroke groove; 208, first bidirectional screw; 20 9. Second threaded sleeve; 210. Second bidirectional screw; 211. Profile plate; 212. Resistance plate; 213. Vertical rectangular rod; 214. Horizontal rectangular rod; 215. Rectangular cylinder; 216. Second stroke groove; 217. Boss; 218. Sliding sleeve; 219. Pressing plate; 220. Annular sleeve; 221. Cylindrical rod; 222. Circular baffle; 223. Elastic member; 224. Column; 225. Disc; 226. Boss; 227. Circular hole; 228. Groove. DETAILED DESCRIPTION

[0027] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0028] Example 1

[0029] like Figures 1 to 3As shown, a universal test stand for functional testing of a circuit board of an intelligent electric energy meter is provided, comprising a main unit 100 and an installation unit 200, wherein the main unit 100 comprises a frame body 101, wherein a test cavity 102 is provided in the frame body 101, wherein a movable plate 104 is provided in the test cavity 102, wherein four guide rods 103 are fixed in the test cavity 102, wherein the guide rods 103 penetrate the movable plate 104, wherein the movable plate 104 is slidably fitted outside the guide rods 103, wherein a hydraulic cylinder 105 is installed on the inner wall at the top of the test cavity 102, wherein the extended end of the hydraulic cylinder 105 is fixed to the movable plate 104, wherein a plurality of connecting columns 107 are fixed to the bottom of the movable plate 104, wherein a needle seat 106 is fixed to the bottom of the connecting column 107, wherein a plurality of test probes 108 are installed on the bottom of the needle seat 106, wherein the installation unit 200 comprises a mounting seat 201, wherein the bottom of the mounting seat 201 is fitted to the inner wall at the bottom of the test cavity 102, wherein the bottom of the test cavity 102 is A slot 202 is provided in the slot wall, and a threaded rod 203 is rotatably connected in the slot 202. A first threaded sleeve 204 is fixed to the bottom of the mounting seat 201, and the first threaded sleeve 204 is slidably fitted in the slot 202. The threaded rod 203 penetrates the first threaded sleeve 204 and is threadedly connected to the first threaded sleeve 204. Two rectangular frames 205 are provided on the mounting seat 201, and two rectangular support plates 206 are slidably connected in the rectangular frames 205. A primary drive component for driving the two rectangular frames 205 to move closer to or away from each other is provided in the mounting seat 201, and a secondary drive component for driving the two rectangular support plates 206 to move closer to or away from each other is provided in the rectangular frame 205. A clamping component for clamping the circuit board of the smart electric energy meter is provided on one side of the rectangular support plate 206, and a control mechanism for controlling the synchronous operation of the clamping components on the four rectangular support plates 206 is provided on the mounting seat 201.

[0030] During use, when the smart energy meter circuit board needs to be tested, the threaded rod 203 is rotated to drive the first threaded sleeve 204 to move. When the first threaded sleeve 204 moves, it drives the mounting seat 201 and the smart energy meter circuit board on the mounting seat 201 to move, so that the test probe 108 can accurately align with the test point on the smart energy meter circuit board, and then the hydraulic cylinder 105 is extended to drive the movable plate 104, the needle seat 106, and the test probe 108 to move downward, so that the test probe 108 and the test point of the smart energy meter circuit board are in close contact, achieving electrical connection, transmitting the test signal to the circuit board, and transmitting the feedback signal of the circuit board back to the test instrument, thus completing the test of the smart energy meter circuit board.

[0031] Among them, the clamping assembly includes a U-shaped plate 211 fixed to one side of the rectangular support plate 206. A抵触 plate 212 is arranged inside the U-shaped plate 211. A vertical rectangular rod 213 is fixed to the bottom of the抵触 plate 212. The vertical rectangular rod 213 penetrates through the U-shaped plate 211 and slides inside the U-shaped plate 211. A horizontal rectangular rod 214 is fixed to the bottom of one of the vertical rectangular rods 213 on the same rectangular frame 205. A rectangular cylinder 215 is fixed to the bottom of the other vertical rectangular rod 213. The horizontal rectangular rod 214 is slidably fitted inside the rectangular cylinder 215. Second stroke grooves 216 are formed on both sides of the rectangular cylinder 215. Two convex columns 217 are fixed to one end of the horizontal rectangular rod 214. The two convex columns 217 are respectively slidably fitted inside the corresponding second stroke grooves 216. A sliding sleeve 218 is fixed to the bottom of the rectangular cylinder 215.

[0032] Embodiment 2

[0033] As Figures 3 to 7 shown, on the basis of Embodiment 1, the control mechanism includes a pressing plate 219. The pressing plate 219 penetrates through the sliding sleeve 218. The sliding sleeve 218 is slidably fitted outside the pressing plate 219. Annular sleeves 210 are fixed to both ends of the pressing plate 219. Two cylindrical rods 221 are fixed to the top of the mounting seat 201. The annular sleeves 210 are slidably fitted outside the corresponding cylindrical rods 221. A circular baffle 222 is fixed to the top of the cylindrical rod 221. An elastic member 223 is sleeved outside the cylindrical rod 221. One end of the elastic member 223 abuts against the annular sleeve 220, and the other end of the elastic member 223 abuts against the mounting seat 201.

[0034] It should be noted that the elastic member 223 can use devices such as springs. And in the normal state of the elastic member 223, the抵触 plate 212 can clamp the intelligent electricity meter circuit board between the U-shaped plate 211 and the抵触 plate 212.

[0035] It should be noted that both sides of the first threaded sleeve 204 are in contact with the inner walls of both sides of the notch 202, so that the first threaded sleeve 204 can move stably in the notch 202. One end of the threaded rod 203 extending outside the frame body 101 is fixed with a first grip. Both sides of the second threaded sleeve 209 are in contact with the inner walls of both sides of the first stroke groove 207, so that the second threaded sleeve 209 can move stably in the first stroke groove 207. One end of the first bidirectional screw rod 208 extending outside the mounting seat 201 is fixed with a second grip. Both sides of the rectangular support plate 206 are in contact with the inner walls of both sides of the rectangular frame 205, so that the rectangular support plate 206 can move stably in the rectangular frame 205. One end of the second bidirectional screw rod 210 extending outside the rectangular frame 205 is fixed with a third grip.

[0036] During use, first lower the pressing plate 219. When the pressing plate 219 moves downward, it drives the annular sleeve 220 to move downward, causing the annular sleeve 220 to compress the elastic member 223. Moreover, when the pressing plate 219 moves downward, it also drives the sliding sleeve 218 to move downward. When the sliding sleeve 218 moves downward, it drives the rectangular cylinder 215 and the horizontal rectangular rod 214 to move downward. When the rectangular cylinder 215 and the horizontal rectangular rod 214 move downward, they drive the vertical rectangular rod 213 and the contact plate 212 to move downward, causing the contact plate 212 to move away from the top plate of the C-shaped plate 211. When the pressing plate 219 moves downward, the disc 225 penetrates through the circular hole 227, and the convex block 226 penetrates through the groove 228. Then rotate the column 224 to drive the disc 225 to rotate, causing the convex block 226 and the groove 228 to be misaligned. At this time, the convex block 226 blocks the pressing plate 219, that is, the pressing plate 219 is fixed, and the contact plate 212 is fixed. Then insert the intelligent electricity meter circuit board into the C-shaped plate 211, and then place the intelligent electricity meter circuit board down so that the intelligent electricity meter circuit board is placed on the contact plate 212;

[0037] After the intelligent electricity meter circuit board is placed on the contact plate 212 and within the C-shaped plate 211, rotate the column 224 to drive the disc 225 and the convex block 226 to rotate. When the convex block 226 rotates to coincide with the groove 228, at this time, under the resilience of the elastic member 223, it drives the annular sleeve 220 and the pressing plate 219 to move upward. When the pressing plate 219 moves upward, it can drive the sliding sleeve 218, the rectangular cylinder 215, and the horizontal rectangular rod 214 to move upward, and further drive the vertical rectangular rod 213 and the contact plate 212 to move upward, causing the contact plate 212 to clamp the intelligent electricity meter circuit board between the contact plate 212 and the C-shaped plate 211, that is, the four corners of the intelligent electricity meter circuit board are fixed synchronously, and the intelligent electricity meter circuit board can be tested.

[0038] In addition, the top of the mounting seat 201 is rotatably connected to a column 224. The top of the column 224 is fixed with a disc 225. Two convex blocks 226 are correspondingly fixed on the outer side of the disc 225. A circular hole 227 is formed in the pressing plate 219. Two grooves 228 are symmetrically formed in the inner wall of the circular hole 227. The disc 225 can penetrate through the circular hole 227, and the convex block 226 can penetrate through the groove 228. The outer diameter of the circular baffle 222 is larger than the inner diameter of the annular sleeve 220. The farthest distance between the two convex blocks 226 is larger than the diameter of the circular hole 227.

[0039] Further, the primary drive assembly includes a second threaded sleeve 209 fixed to the bottom of the rectangular frame 205. A first travel groove 207 for the second threaded sleeve 209 to slide is formed in the mounting seat 201. A first bidirectional screw 208 is rotatably connected in the first travel groove 207, and the first bidirectional screw 208 passes through the second threaded sleeve 209 and is threadedly connected to the second threaded sleeve 209. The secondary drive assembly includes a second bidirectional screw 210 rotatably disposed within the rectangular frame 205. The second bidirectional screw 210 passes through the rectangular support plate 206 and is threadedly connected to the rectangular support plate 206. The two threaded sections of the first bidirectional screw 208 have opposite thread directions, and the two second threaded sleeves 209 are respectively located on different threaded sections of the first bidirectional screw 208. The two threaded sections of the second bidirectional screw 210 have opposite thread directions, and the two rectangular support plates 206 are respectively located on different threaded sections of the second bidirectional screw 210.

[0040] During use, when it is necessary to test intelligent electricity meter circuit boards of different size types, rotate the first bidirectional screw 208 to drive the two second threaded sleeves 209 to move closer to or away from each other. When the second threaded sleeve 209 moves, it drives the rectangular frame 205 to move accordingly. Then rotate the second bidirectional screw 210 to drive the two rectangular support plates 206 to move closer to or away from each other, that is, adjust the position of the rectangular support plate 206, so that the clamping assembly can clamp and fix intelligent electricity meter circuit boards of different size types, thereby enabling the testing of intelligent electricity meter circuit boards of different size types. During this process, when the rectangular frame 205 moves, the sliding sleeve 218 slides outside the pressing plate 219, and when the rectangular support plate 206 moves, the horizontal rectangular rod 214 slides within the rectangular cylinder 215. After the position of the rectangular support plate 206 is adjusted, when the pressing plate 219 is moved downward, it can still drive the contact plates 212 within the four U-shaped plates 211 to move downward synchronously, that is, for the rectangular support plate 206 after the position adjustment, the clamping assembly on the support plate 206 can still synchronously clamp and fix the four corners of the intelligent electricity meter circuit board.

[0041] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A universal test stand for functional testing of circuit boards of smart electric energy meters, characterized in that: include: A main unit (100) comprises a frame (101), wherein a test cavity (102) is provided in the frame (101), wherein a movable plate (104) is arranged in the test cavity (102), wherein four guide rods (103) are fixed in the test cavity (102), wherein the guide rods (103) penetrate the movable plate (104), wherein the movable plate (104) is slidably fitted outside the guide rods (103), wherein a hydraulic cylinder (105) is installed on the inner wall of the top of the test cavity (102), wherein the extended end of the hydraulic cylinder (105) is fixed to the movable plate (104), wherein a plurality of connecting columns (107) are fixed to the bottom of the movable plate (104), wherein a needle seat (106) is fixed to the bottom of the connecting column (107), wherein a plurality of test probes (108) are installed at the bottom of the needle seat (106); The mounting unit (200) comprises a mounting seat (201), the bottom of the mounting seat (201) is fitted with the inner wall of the bottom of the test cavity (102), the groove wall of the bottom of the test cavity (102) is provided with a notch (202), a threaded rod (203) is rotatably connected in the notch (202), a first threaded sleeve (204) is fixed at the bottom of the mounting seat (201), the first threaded sleeve (204) is slidably fitted in the notch (202), the threaded rod (203) passes through the first threaded sleeve (204) and is threadedly connected to the first threaded sleeve (204), and two threaded sleeves (203) are provided on the mounting seat (201). A rectangular frame (205), two rectangular support plates (206) are slidably connected in the rectangular frame (205), a primary drive component for driving the two rectangular frames (205) to move closer to or farther from each other is arranged in the mounting seat (201), a secondary drive component for driving the two rectangular support plates (206) to move closer to or farther from each other is arranged in the rectangular frame (205), a clamping component for clamping a circuit board of an intelligent electric energy meter is arranged on one side of the rectangular support plate (206), and a control mechanism for controlling the synchronous operation of the clamping components on the four rectangular support plates (206) is arranged on the mounting seat (201).

2. The universal test stand for functional testing of a circuit board of an intelligent electric energy meter according to claim 1, characterized in that: The primary drive assembly comprises a second threaded sleeve (209) fixed at the bottom of the rectangular frame (205); a first travel groove (207) for the second threaded sleeve (209) to slide is provided in the mounting seat (201); a first bidirectional screw rod (208) is rotatably connected in the first travel groove (207); and the first bidirectional screw rod (208) passes through the second threaded sleeve (209) and is threadedly connected to the second threaded sleeve (209).

3. The universal test stand for functional testing of a circuit board of an intelligent electric energy meter according to claim 2, characterized in that: The secondary drive assembly comprises a second bidirectional screw (210) which is located and rotated in a rectangular frame (205); the second bidirectional screw (210) penetrates the rectangular support plate (206) and is threadedly connected to the rectangular support plate (206).

4. The universal test stand for functional testing of a circuit board of a smart electric energy meter according to claim 3 is characterized in that: The two sections of the first bidirectional screw (208) have opposite thread directions, and the two second thread sleeves (209) are respectively located on different thread sections of the first bidirectional screw (208); the two sections of the second bidirectional screw (210) have opposite thread directions, and the two rectangular support plates (206) are respectively located on different thread sections of the second bidirectional screw (210).

5. The universal test stand for functional testing of a circuit board of an intelligent electric energy meter according to claim 1, characterized in that: The clamping assembly comprises a shaped plate (211) fixed to one side of a rectangular support plate (206), a contact plate (212) being arranged inside the shaped plate (211), a vertical rectangular rod (213) being fixed to the bottom of the contact plate (212), the vertical rectangular rod (213) passing through the shaped plate (211) and sliding inside the shaped plate (211), a horizontal rectangular rod (214) being fixed to the bottom of one of the vertical rectangular rods (213) on the same rectangular frame (205), a rectangular tube (215) being fixed to the bottom of the other vertical rectangular rod (213), the horizontal rectangular rod (214) being slidably fitted inside the rectangular tube (215).

6. The universal test stand for functional testing of a circuit board of an intelligent electric energy meter according to claim 5, characterized in that: Second travel grooves (216) are provided on both sides of the rectangular tube (215); two protruding columns (217) are fixed to one end of the horizontal rectangular rod (214); the two protruding columns (217) are respectively slidably matched in the corresponding second travel grooves (216); and a sliding sleeve (218) is fixed to the bottom of the rectangular tube (215).

7. The universal test stand for functional testing of a circuit board of a smart electric energy meter according to claim 6, characterized in that: The control mechanism comprises a pressure plate (219), the pressure plate (219) passes through a sliding sleeve (218), the sliding sleeve (218) is slidably fitted outside the pressure plate (219), an annular sleeve (220) is fixed at both ends of the pressure plate (219), two cylindrical rods (221) are fixed on the top of the mounting seat (201), and the annular sleeve (220) is slidably fitted outside the corresponding cylindrical rods (221).

8. The universal test stand for functional testing of a circuit board of an intelligent electric energy meter according to claim 7, characterized in that: A circular baffle (222) is fixed on the top of the cylindrical rod (221), and an elastic member (223) is sleeved on the outer side of the cylindrical rod (221). One end of the elastic member (223) abuts against the annular sleeve (220), and the other end of the elastic member (223) abuts against the mounting seat (201).

9. The universal test stand for functional testing of a circuit board of a smart electric energy meter according to claim 8, characterized in that: The top of the mounting seat (201) is rotatably connected to a column (224), the top of the column (224) is fixed with a disc (225), the outer side of the disc (225) is correspondingly fixed with two protrusions (226), a circular hole (227) is provided in the pressure plate (219), the inner wall of the circular hole (227) is symmetrically provided with two grooves (228), the disc (225) can pass through the circular hole (227), and the protrusions (226) can pass through the grooves (228).

10. The universal test stand for functional testing of a circuit board of an intelligent electric energy meter according to claim 9, characterized in that: The outer diameter of the circular baffle (222) is greater than the inner wall diameter of the annular sleeve (220), and the farthest distance between the two protrusions (226) is greater than the diameter of the circular hole (227).

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