A modified fixture for testing electrical performance of air-core coil inductors

Abstract

The present application provides an electrical performance test modification jig for a hollow coil inductor, the hollow coil inductor comprising a coil body and two pins connected to the coil body, the coil body being in the shape of a hollow cylinder, the two pins being connected to the edge of one side of the coil body, and being bent from the edge toward the center to form a hook-shaped structure with an opening, the electrical performance test jig comprising a workbench, on which two conductive contacts are adjacently arranged; an insulating pressure block, configured as follows: a first side portion of the insulating pressure block is used to insert into the opening of the hook-shaped structure, and the coil body is supported on the insulating pressure block, and the insulating pressure block is also used to press and hold the two pins located below it on the two conductive contacts in a one-to-one correspondence, so as to perform electrical performance testing. The electrical performance test modification jig provided by the present application can make the coil portion of the hollow coil inductor less likely to deform during testing, thereby improving the accuracy of the electrical performance test results.

Description

Technical Field

[0001] This application belongs to the technical field of test fixtures, and particularly relates to a modified test fixture for the electrical performance test of a hollow coil inductor. Background Art

[0002] Hollow coil radio frequency inductors have the characteristics of small inductance (in the nH level), high quality factor, and high self-resonant frequency, and are mainly used in fields such as communication, automotive, aerospace, etc. To ensure that the electrical performance parameter indicators of the inductor are qualified, electrical performance testing is one of the essential technological processes in the production and preparation of inductors, which can expose inductors with unqualified electrical performance in advance to ensure the reliability and stability of the inductor products leaving the factory.

[0003] Currently, with the continuous increase in the market demand for different types of inductors, some new-structured hollow coil inductors have emerged. However, traditional electrical performance test fixtures cannot adapt to new-structured hollow coil inductors, resulting in the coil part of the new-structured hollow coil inductor being prone to deformation during testing, making the test results have a large error, and thus the electrical performance test results of the new-structured hollow coil inductor are inaccurate. Summary of the Invention

[0004] This application provides a modified test fixture for the electrical performance test of a hollow coil inductor, which can make the coil part of the hollow coil inductor not easily deformed and improve the accuracy of the electrical performance test results.

[0005] To solve the above problems, the technical solution provided by this application is: a modified test fixture for the electrical performance test of a hollow coil inductor, the hollow coil inductor includes a coil body and two pins connected to the coil body, the coil body is in a hollow cylindrical shape, the two pins are connected to the edge of one side of the coil body and bend from the edge towards the center direction to form a hook-shaped structure with an opening, the electrical performance test fixture includes a workbench, and two conductive contacts are arranged adjacent to each other on the workbench; the insulating pressing block is configured such that: the first side portion of the insulating pressing block is used to insert into the opening of the hook-shaped structure and support the coil body on the insulating pressing block, and the insulating pressing block is further used to press and hold the two pins located below itself one by one on the two conductive contacts for electrical performance testing.

[0006] In a possible design, a U-shaped positioning groove is provided on the upper surface of the insulating pressing block, the opening of the U-shaped positioning groove penetrates the edge of the first side portion, the U-shaped positioning groove is used to accommodate the coil body and position the coil body, and the two pins extend out from the opening of the U-shaped positioning groove and extend to the lower part of the insulating pressing block.

[0007] In a possible design, a U-shaped notch is provided on the bottom wall of the U-shaped positioning groove, and the U-shaped notch passes through the edge of the first side portion, and the bottom walls of the two parts on both sides of the U-shaped notch press the two pins one by one.

[0008] In a possible design, one of the conductive contacts is a circular ring structure and is attached to the workbench, and the other conductive contact is a disc-shaped structure and is located inside the circular ring structure. The circular ring structure and the disc-shaped structure are arranged concentrically, and the workbench is also provided with an insulating ring located between the two circular ring structures and the disc-shaped structure for electrical insulation.

[0009] In a possible design, an insulating plate covering the two conductive contacts is provided on the workbench, and two conductive through holes are provided on the insulating plate for the pins to extend into and be electrically connected to the conductive contacts.

[0010] In a possible design, a groove is provided on the workbench, the insulating plate covers the bottom wall of the groove, a positioning boss is provided on the bottom wall of the groove, and the positioning boss is inserted into a positioning hole opened on the insulating plate.

[0011] In a possible design, the electrical performance test modification fixture also includes a lifting device, which includes a support seat, a middle column and a handle. The support seat is arranged on the workbench and has a telescopic hole that passes through the upper and lower parts. The middle column can be lifted and lowered in the telescopic hole. The upper end of the middle column extends out of the support seat and is connected to the handle, and the lower end of the middle column extends out of the support seat and is connected to the insulating pressure block. The handle drives the insulating pressure block to rise and fall through the middle column.

[0012] In a possible design, the lifting device also includes a U-shaped connecting plate, the upper end of the middle column is connected to the bottom surface of the U-shaped connecting plate, the middle part of the handle is hinged in the opening of the U-shaped connecting plate, one end of the handle is a free end, and the other end is rollingly abutted against the upper surface of the support seat through a roller.

[0013] In a possible design, the lifting device further includes a positioning pin disposed at an upper end of the middle column member, the middle column member is a cylindrical structure, and the positioning pin extends out of the middle column member along a radial direction of the middle column member.

[0014] In a possible design, the electrical performance test modification fixture also includes a translation device, and the support seat is arranged on the workbench through the translation device, and the translation device is used to adjust the relative position of the pin located under the insulating pressure block itself and the conductive contact.

[0015] According to the electrical performance test modification jig of the hollow coil inductor provided in the embodiment of the present application, when in use, the tester first inserts the opening of the hook-shaped structure with an opening formed by the tested hollow coil inductor on the first side of the insulating pressure block, so that the coil body is supported on the insulating pressure block and the two pins are located below the insulating pressure block (towards the conductive contacts of the workbench). After placing the hollow coil inductor on the insulating pressure block, the relative positions of the two pins located below the insulating pressure block itself and the two conductive contacts are adjusted so that the insulating pressure block can press and hold the two pins on the two conductive contacts one by one. After the pins are in stable contact with the conductive contacts, the tester can start testing and recording the electrical performance parameters of the hollow coil inductor, such as the inductance, quality factor and self-resonant frequency. The electrical performance parameters tested can screen out hollow coil inductors with unqualified indicators to ensure the reliability and stability of the hollow coil inductors shipped from the factory.

[0016] The electrical performance test modification fixture provided in the embodiment of the present application is used as follows Figure 1 The characteristic of the hollow coil inductor shown in the figure is that the two pins and the coil body form a hook-shaped structure with an opening, so that the insulating pressing block can be Figure 1 The coil body and pins of the hollow coil inductor of the structure shown are separated, so that the coil body is located above the insulating pressing block, and the pins are located below the insulating pressing block (toward the conductive contacts), so that during the test, the insulating pressing block does not press the coil body of the hollow coil inductor, but can press and hold the two pins one by one on the two conductive contacts, so that the tester can perform the electrical performance test of the hollow coil inductor. During the test, the insulating pressing block will not press the coil body of the hollow coil inductor but only press the two pins, which can make the hollow coil inductor less likely to deform, thereby improving the accuracy of the electrical performance test of the hollow coil inductor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an air-core coil inductor provided in one embodiment of the present application;

[0018] Figure 2 It is a schematic diagram of the overall structure of an electrical performance test modification fixture for an air-core coil inductor provided in one embodiment of the present application;

[0019] Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle A;

[0020] Figure 4 is a cross-sectional view of an electrical performance test modification fixture provided in one embodiment of the present application;

[0021] Figure 5 is a top view of an electrical performance test modification fixture provided in one embodiment of the present application;

[0022] Figure 6 It is a schematic diagram of the structure decomposition of the electrical performance test modification fixture provided in one embodiment of the present application;

[0023] Figure 7 This is a partial structural diagram of an electrical performance test modification fixture provided in one embodiment of the present application;

[0024] Figure 8 yes Figure 7 A partial enlarged schematic diagram of point B in the middle;

[0025] Fig. 9 It is a schematic diagram of the overall structure of an electrical performance test modification fixture provided by an embodiment of the present application for installing an air-core coil inductor;

[0026] Fig.10 yes Fig. 9 A partial enlarged schematic diagram of point C in the middle.

[0027] Figure numerals: 10, workbench; 11, conductive contact; 12, groove; 13, positioning boss; 14, insulating ring; 15, bolt hole; 20, insulating pressure block; 21, U-shaped positioning groove; 22, U-shaped notch; 30, hollow coil inductor; 31, pin; 32, coil body; 40, lifting device; 41, support seat; 41a, telescopic hole; 42, middle column; 43, handle; 44, U-shaped connecting plate; 45, roller; 46, positioning pin; 47, positioning column; 48, spring; 49, positioning ring sleeve; 50, insulating plate; 51, conductive through hole; 52, positioning hole; 60, translation device; 61, guide plate; 62, slideway. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly defined and specifically defined. In the present application, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, it can also be a detachable connection, or it can be integrated; it can be directly connected, it can also be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0030] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] In the description of this application, it should be understood that the terms "inside", "outside", "upper", "bottom", "front", "back" and the like indicate directions or positional relationships (if any) based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] Figure 1 Schematic diagram of the overall structure of an air-core coil inductor provided in one embodiment of the present application. Figure 1 As shown, the hollow coil inductor 30 includes a coil body 32 and two pins 31 connected to the coil body 32. The coil body 32 is in the shape of a hollow cylinder. The two pins 31 are connected to the edge of one side of the coil body 32 and are bent from the edge toward the center to form a hook-shaped structure with an opening. Here, the two hook-shaped structures are arranged side by side with the openings facing the same direction. The electrical performance test modification fixture provided in the embodiment of the present application is tested as follows Figure 1The electrical performance of the air-core coil inductor 30 structure shown or a similar air-core coil inductor 30 structure having an open hook-shaped structure formed between two pins 31 and a coil body 32 .

[0033] Figure 2 It is a schematic diagram of the overall structure of an electrical performance test modification fixture for an air-core coil inductor 30 provided in one embodiment of the present application. Figure 3 yes Figure 2 A local enlarged schematic diagram of the middle point. Figure 2-3 As shown, the electrical performance test modification fixture provided in the embodiment of the present application includes a workbench 10 and an insulating pressing block 20 .

[0034] Among them, two conductive contacts 11 are arranged adjacent to each other on the workbench 10. During the test, the workbench 10 is installed on the test equipment (such as but not limited to the radio frequency impedance analyzer) as the support surface of the electrical performance test modification fixture. The conductive contacts 11 on the workbench 10 are connected to the hollow coil inductor 30 (such as Figure 1 as shown) in contact with pin 31.

[0035] The insulating block 20 is generally made of insulating material (such as plastic) or non-conductive metal with a treated surface (such as aluminum with a passivation layer on the surface) to prevent short circuits from occurring during the test of the modified fixture for electrical performance testing. The insulating block 20 is configured as follows: the first side of the insulating block 20 is used to insert into the opening of the hook-shaped structure, and the coil body 32 is supported on the insulating block 20. The insulating block 20 is also used to press and hold the two pins 31 located below it on the two conductive contacts 11 in a one-to-one correspondence to perform electrical performance testing.

[0036] That is, any one side (i.e., the first side) of the insulating pressing block 20 on the horizontal plane is inserted into the insulating pressing block 20. Figure 1 When the hollow coil inductor 30 is placed in the two hook-shaped structure openings shown, the hollow coil inductor 30 can be divided into two upper and lower parts. The coil body 32 is located above the insulating block 20 (away from the conductive contact 11) and supported by the insulating block 20, and the two pins 31 are located below the insulating block 20 (towards the conductive contact 11). In this way, the insulating block 20 can only press the pins 31 located below the insulating block 20 to make them electrically connected to the conductive contact 11 on the workbench 10 to test the electrical properties of the hollow coil inductor 30.

[0037] According to the modified jig for testing the electrical performance of the hollow coil inductor 30 provided in the embodiment of the present application, when in use, the tester first inserts the opening of the hook-shaped structure with an opening formed by the tested hollow coil inductor 30 on the first side of the insulating block 20, so that the coil body 32 is supported on the insulating block 20 and the two pins 31 are located below the insulating block 20 (towards the conductive contacts 11 of the workbench 10). After placing the hollow coil inductor 30 on the insulating block 20, the relative positions of the two pins 31 located below the insulating block 20 and the two conductive contacts 11 are adjusted so that the insulating block 20 can press and hold the two pins 31 on the two conductive contacts 11 one by one. After the pins 31 are in stable contact with the conductive contacts 11, the tester can start testing and recording the electrical performance parameters of the hollow coil inductor 30, such as the inductance, quality factor and self-resonant frequency. The electrical performance parameters tested can screen out the air-core coil inductors 30 with unqualified indicators, so as to ensure the reliability and stability of the air-core coil inductors 30 shipped out of the factory.

[0038] The electrical performance test modification fixture provided in the embodiment of the present application is used as follows Figure 1 The hollow coil inductor 30 shown in the figure has a hook-shaped structure with an opening formed between the two pins 31 and the coil body 32, so that the insulating pressing block 20 can be Figure 1 The coil body 32 and the pin 31 of the hollow coil inductor 30 of the structure shown are separated, so that the coil body 32 is located above the insulating pressing block 20, and the pin 31 is located below the insulating pressing block 20 (toward the conductive contact 11), so that during the test, the insulating pressing block 20 does not press the coil body 32 of the hollow coil inductor 30, but can press and hold the two pins 31 on the two conductive contacts 11 one by one, so that the tester can perform the electrical performance test of the hollow coil inductor 30. During the test, the insulating pressing block 20 will not press the coil body 32 of the hollow coil inductor 30 but only press the two pins 31, so that the hollow coil inductor 30 is not easily deformed, thereby improving the accuracy of the electrical performance test of the hollow coil inductor 30.

[0039] Furthermore, if Figure 2-3 As shown, in the embodiment of the present application, a U-shaped positioning groove 21 is provided on the upper surface of the insulating pressing block 20, the opening of the U-shaped positioning groove 21 passes through the edge of the first side portion, the U-shaped positioning groove 21 is used to accommodate the coil body 32 and position the coil body 32, and two pins 31 extend from the opening of the U-shaped positioning groove 21 and extend to the bottom of the insulating pressing block 20. The above arrangement can locate the position of the hollow coil inductor 30 on the insulating pressing block 20.

[0040] Inserting and positioning the hollow coil inductor 30 on the U-shaped positioning groove 21 can, on the one hand, prevent the position of the hollow coil inductor 30 on the insulating block 20 from changing during the test and affecting the stable contact between the pin 31 and the conductive contact 11; on the other hand, it can ensure that each hollow coil inductor 30 tested is in the same position, thereby ensuring the consistency of the test results, thereby avoiding affecting the accuracy of the electrical performance test results of the hollow coil inductor 30.

[0041] Specifically, in the embodiment of the present application, the U-shaped positioning groove 21 is adapted to the coil body 32 of the hollow coil inductor 30, that is, the coil body 32 can be just stuck into the U-shaped positioning groove 21, so that the position of the hollow coil inductor 30 can be more accurately positioned, so that when testing the electrical performance of the same batch of hollow coil inductors 30, it is only necessary to adjust the relative positions of the two pins 31 located under the insulating block 20 and the two conductive contacts 11 once, so that each of the two pins 31 located under the insulating block 20 can correspond to the two conductive contacts 11 one by one, thereby realizing fast loading and improving testing efficiency.

[0042] For example, when the tester measures the electrical performance of the hollow coil inductor 30 for the first time, after inserting the hollow coil inductor 30 into the insulating block 20, it is necessary to adjust the relative position of the two pins 31 on the insulating block 20 and the conductive contacts 11 (to ensure that the two pins 31 can be pressed on the two conductive contacts 11 one by one). Only after the position is adjusted can the electrical performance test be performed. When measuring the electrical performance of the hollow coil inductor 30 of the same structure later, since the insulating block 20 is provided with a U-shaped positioning groove 21, the tester can place the hollow coil inductor 30 in the same position each time, thereby saving the time of adjusting the position of the pins 31 of the hollow coil inductor 30 on the insulating block 20. The hollow coil inductor 30 only needs to be placed in the U-shaped positioning groove 21 for alignment, so as to achieve rapid loading and improve test efficiency.

[0043] Specifically, in the embodiment of the present application, a U-shaped notch 22 is provided on the bottom wall of the U-shaped positioning groove 21, and the U-shaped notch 22 passes through the edge of the first side portion, and the bottom walls of the two parts on both sides of the U-shaped notch 22 press the two pins 31 one by one. Through the above arrangement, during the test, it is only necessary to arrange the two pins 31 one by one under the bottom walls of the two parts on both sides of the U-shaped notch 22, so as to position the two pins 31, and it is also possible to further reduce the weight of the insulating pressing block 20, facilitate the operation of the tester, and improve the test efficiency.

[0044] Figure 4 It is a cross-sectional view of an electrical performance test modification fixture provided in one embodiment of the present application. Figure 5 It is a top view of an electrical performance test modification fixture provided in one embodiment of the present application. Figure 6It is a schematic diagram of the structural decomposition of an electrical performance test modification fixture provided in one embodiment of the present application. Figure 7 It is a partial structural schematic diagram of an electrical performance test modification fixture provided in one embodiment of the present application. Figure 8 yes Figure 7 A partial enlarged schematic diagram of point B in the middle. Fig. 9 It is a schematic diagram of the overall structure of an electrical performance test modification fixture provided in an embodiment of the present application for installing an air-core coil inductor 30 . Fig.10 yes Fig. 9 The following is a partial enlarged schematic diagram of point C in the middle. Figure 2-10 The specific structure of the electrical performance test modification fixture provided by the present application is further explained.

[0045] like Figure 6-8 As shown, in the embodiment of the present application, one of the two conductive contacts 11 arranged on the workbench 10 is a circular ring structure and is attached to the workbench 10, and the other is a disc-shaped structure and is located inside the circular ring structure. The circular ring structure and the disc-shaped structure are arranged concentrically. The workbench 10 is also provided with an insulating ring 14 located between the two circular ring structures and the disc-shaped structure for electrical insulation.

[0046] By setting the conductive contact 11 into a circular ring structure and a disc-shaped structure, not only can the conductive contact 11 be adapted to the structure of the pins 31 of different hollow coil inductors 30, thereby increasing the versatility of the workbench 10, but also the tester can more conveniently and quickly adjust the relative positions of the two pins 31 and the two conductive contacts 11 located below the insulating block 20, that is, when the two pins 31 are respectively located within the range of the circular ring-shaped conductive contact 11 and the disc-shaped conductive contact 11, the two pins 31 can be electrically connected to the two conductive contacts 11. In addition, by setting the insulating ring 14, a short circuit between the two conductive contacts 11 can be avoided, thereby ensuring that the test can be carried out normally.

[0047] like Figure 2-6 As shown, in the embodiment of the present application, an insulating plate 50 covering two conductive contacts 11 is provided on the workbench 10, and two conductive through holes 51 are provided on the insulating plate 50 for the pins 31 to extend into and electrically connect with the conductive contacts 11. By providing the insulating plate 50 on the workbench 10, it is possible to avoid short circuits caused by improper operation and other reasons during the test process, thereby affecting the normal progress of the test. Providing the conductive through holes 51 on the insulating plate 50 not only enables the pins 31 located below the insulating pressure block 20 to be electrically connected with the conductive contacts 11, but also enables the tester to locate the position of the conductive contacts 11 more conveniently and quickly.

[0048] Specifically, in the embodiment of the present application, a groove 12 is provided on the workbench 10, and the insulating plate 50 covers the bottom wall of the groove 12. A positioning boss 13 is provided on the annular conductive contact 11, and the positioning boss 13 is inserted into a positioning hole 52 provided on the insulating plate 50. Through the mutual cooperation between the positioning hole 52 and the positioning boss 13, it is possible to prevent the insulating plate 50 from moving so that the relative position of the conductive through hole 51 on the conductive contact 11 changes, thereby affecting the test result of the electrical performance test.

[0049] like Figure 2-10 As shown, in the embodiment of the present application, the electrical performance test modification fixture further includes a lifting device 40, which is used to drive the insulating block 20 to rise and fall. By providing the lifting device 40, the insulating block 20 can be operated more conveniently and efficiently, and the replacement speed and test speed of the air-core coil inductor 30 placed on the insulating block 20 are increased, thereby improving the test efficiency.

[0050] Specifically, in the embodiment of the present application, the lifting device 40 includes a support seat 41, a middle column 42 and a handle 43. The support seat 41 is arranged on the workbench 10 and has a telescopic hole 41a extending vertically therethrough. The middle column 42 is arranged in the telescopic hole 41a so as to be liftable. The upper end of the middle column 42 extends out of the support seat 41 and is connected to the handle 43. The lower end of the middle column 42 extends out of the support seat 41 and is connected to the insulating pressure block 20. The handle 43 drives the insulating pressure block 20 to rise and fall through the middle column 42.

[0051] During the test, the tester can lift the insulating block 20 connected to the middle column 42 by the handle 43, insert the two open hook-shaped pins 31 of the hollow coil inductor 30 into the first side of the insulating block 20, and after placing the hollow coil inductor 30 on the insulating block 20, adjust the positions of the pins 31 and the conductive contacts 11 below the insulating block 20, and then press down the insulating block 20 by the handle 43 so that the two pins 31 below the insulating block 20 are pressed and maintained on the two conductive contacts 11 on the workbench 10 in a one-to-one correspondence, so as to perform the electrical performance test. That is, by lifting and pressing down the insulating block 20 by the lifting device 40, the hollow coil inductor 30 can be replaced conveniently and efficiently, and the insulating block 20 can quickly press the two pins 31 on the two conductive contacts 11 in a one-to-one correspondence, thereby improving the test efficiency.

[0052] Furthermore, in the embodiment of the present application, the lifting device 40 also includes a U-shaped connecting plate 44, the upper end of the middle column 42 is connected to the bottom surface of the U-shaped connecting plate 44, the middle part of the handle 43 is hinged in the opening of the U-shaped connecting plate 44, one end of the handle 43 is a free end, and the other end is rolled and abutted against the upper surface of the support seat 41 through the roller 45. The middle part of the handle 43 is hinged to the U-shaped connecting plate 44 and one end is rolled and abutted against the upper surface of the support seat 41 through the roller 45 to make the handle 43. Through the above settings, the tester can conveniently and efficiently operate the lifting and lowering of the insulating pressure block 20 by rolling the handle 43 back and forth.

[0053] The tester drives the handle 43 to roll back and forth on the upper surface of the support seat 41, so that the angle between the handle 43 and the upper surface of the support seat 41 changes, while the length of the handle 43 connected between the U-shaped connecting plate 44 and the upper surface of the support seat 41 remains unchanged, which causes the height between the U-shaped connecting plate 44 and the upper surface of the support seat 41 to change, thereby causing the middle column 42 connected to the U-shaped connecting plate 44 to rise and fall, that is, causing the insulating pressure block 20 connected to the middle column 42 to rise and fall. That is, rolling the handle 43 on the upper surface of the support seat 41 to change the angle between the handle 43 and the upper surface of the support seat 41 can cause the insulating pressure block 20 to rise and fall.

[0054] Specifically, in the implementation of the present application, the lifting device 40 further includes a positioning pin 46, which is provided at the upper end of the middle column 42 extending from the support seat 41, the middle column 42 is a cylindrical structure, and the positioning pin 46 extends from the middle column 42 along the radial direction of the middle column 42. By providing the positioning pin 46, the height of the middle column 42 can be limited, so as to prevent the handle 43 from driving the middle column 42 to drive the insulating pressing block 20 to be excessively pressed down, thereby affecting the accuracy of the electrical performance test of the hollow coil inductor 30.

[0055] In the embodiment of the present application, the lifting device 40 further includes a spring 48 and two positioning posts 47. The spring 48 is located in the telescopic hole 41a and is sleeved outside the middle column 42. When the handle 43 is in a free state, the spring 48 presses the pin 31 located below the insulating pressure block 20 onto the conductive contact 11. The two positioning posts 47 are connected to the bottom surfaces of the side arms on both sides of the opening of the U-shaped connecting plate 44 and can be telescopically extended into the telescopic hole 41a.

[0056] By setting the spring 48, when the handle 43 is in a free state, the insulating block 20 can stably press the pin 31 located below the insulating block 20 itself onto the two conductive contacts 11, so that the tester does not need to apply force to the handle 43 for a long time during the test to ensure that the two pins 31 are in stable contact with the two conductive contacts 11, that is, the tester's hand can be removed from the handle 43 during the test, which is convenient for subsequent operations.

[0057] By providing two positioning columns 47 that can be telescopically extended into the telescopic hole 41a, it is possible to prevent the middle column 42 from rotating while being raised or lowered when the tester moves the handle 43, thereby affecting the contact between the pin 31 located below the insulating pressure block 20 connected to the middle column 42 and the conductive contact 11.

[0058] Specifically, a positioning ring sleeve 49 is fixedly provided at the lower end of the middle column 42 located in the support seat 41. When the tester grasps the free end of the handle 43 and rolls the handle 43 to move the middle column 42 upward to lift the insulating block 20, the positioning ring sleeve 49 fixed on the middle column 42 will move upward with the middle column 42. At this time, the upward movement of the positioning ring sleeve 49 will compress the spring 48 sleeved on the middle column 42 to put it in a compressed state. When the tester needs to test such as Figure 1 After the two pins 31 of the hollow coil inductor 30 are plugged into the insulating block 20, the tester can release the handle 43 to make the handle 43 free. At this time, the spring 48 is reset under the elastic force and gravity, and can drive the middle column 42 to move downward, so that the two pins 31 located below the insulating block 20 are in stable contact with the two conductive contacts 11 to achieve electrical connection.

[0059] Furthermore, since two positioning columns 47 are provided, the center column 42 can be prevented from twisting during the descent process, which would change the relative positions of the two pins 31 below the insulating pressing block 20 and the two conductive contacts 11 and affect the electrical performance test results.

[0060] like Figure 2-10 As shown, in an embodiment of the present application, the electrical performance test modification fixture also includes a translation device 60, and the support seat 41 is arranged on the workbench 10 through the translation device 60, and the translation device 60 is used to adjust the relative positions of the two pins 31 located under the insulating pressure block 20 itself and the conductive contact 11.

[0061] That is, in the embodiment of the present application, the tester adjusts the relative positions of the two pins 31 of the hollow coil inductor 30 inserted on the first side of the insulating block 20 and the conductive contacts 11 on the workbench 10 through the translation device 60, so that the insulating block 20 can press the two pins 31 located below itself onto the two conductive contacts 11 one by one.

[0062] Specifically, the translation device 60 includes a guide plate 61 and a bolt (not shown in the figure), and the guide plate 61 is provided with a slide 62 that passes through from top to bottom, and the workbench 10 is provided with a bolt hole 15, and the bolt hole 15 is located in the slide 62. The relative position of the support seat 41 and the workbench 10 is adjusted by moving the guide plate 61 to adjust the relative position of the two pins 31 located under the insulating block 20 itself and the two conductive contacts 11, so that the two pins 31 and the two conductive contacts 11 are arranged in a one-to-one correspondence. After the adjustment is completed, the guide plate 61 is fixed to the workbench 10 through the mutual cooperation of the bolt and the bolt hole 15 to avoid the position of the insulating block 20 changing during the test and affecting the electrical connection between the two pins 31 located under the insulating block 20 itself and the conductive contacts 11.

[0063] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A modification jig for testing electrical properties of a hollow coil inductor, the hollow coil inductor (30) comprising a coil body (32) and two pins (31) connected to the coil body (32), the coil body (32) being in the shape of a hollow cylinder, the two pins (31) being connected to the edge of one side of the coil body (32) and being bent from the edge toward the center to form a hook-shaped structure with an opening, It is characterized in that The electrical performance test modification fixture includes: A workbench (10), wherein two conductive contacts (11) are adjacently arranged on the workbench (10); The insulating pressing block (20) is configured such that: a first side portion of the insulating pressing block (20) is used to be inserted into the opening of the hook-shaped structure, and the coil body (32) is supported on the insulating pressing block (20); the insulating pressing block (20) is also used to press and hold the two pins (31) located below the insulating pressing block on the two conductive contacts (11) in a one-to-one correspondence, so as to perform an electrical performance test; One of the conductive contacts (11) is a circular ring structure and is attached to the workbench (10); the other conductive contact (11) is a disc-shaped structure and is located inside the circular ring structure; the circular ring structure and the disc-shaped structure are arranged concentrically; and the workbench (10) is further provided with an insulating ring (14) located between the two circular ring structures and the disc-shaped structure for electrical insulation. The electrical performance test modification fixture also includes: A lifting device (40), the lifting device (40) comprising a support seat (41), a middle column (42) and a handle (43), the support seat (41) being arranged on the workbench (10) and having a telescopic hole (41a) penetrating from top to bottom, the middle column (42) being arranged in the telescopic hole (41a) so as to be liftable, the upper end of the middle column (42) extending out of the support seat (41) and connected to the handle, the lower end of the middle column (42) extending out of the support seat (41) and connected to the insulating pressure block (20), and the handle (43) driving the insulating pressure block (20) to be lifted or lowered via the middle column (42).

2. The electrical performance test modification fixture according to claim 1, It is characterized in that A U-shaped positioning groove (21) is provided on the upper surface of the insulating pressing block (20), the opening of the U-shaped positioning groove (21) passes through the edge of the first side portion, the U-shaped positioning groove (21) is used to accommodate the coil body (32) and position the coil body (32), and the two pins (31) extend from the opening of the U-shaped positioning groove (21) and extend to the bottom of the insulating pressing block (20).

3. The electrical performance test modification fixture according to claim 2, It is characterized in that A U-shaped notch (22) is provided on the bottom wall of the U-shaped positioning groove (21), and the U-shaped notch (22) passes through the edge of the first side portion. The bottom walls of the two parts on both sides of the U-shaped notch (22) press the two pins (31) in a one-to-one correspondence.

4. The electrical performance test modification fixture according to any one of claims 1 to 3, It is characterized in that An insulating plate (50) covering the two conductive contacts (11) is provided on the workbench (10), and two conductive through holes (51) are provided on the insulating plate (50) for the pins (31) to extend into and be electrically connected to the conductive contacts (11).

5. The electrical performance test modification fixture according to claim 4, It is characterized in that The workbench (10) is provided with a groove (12), the insulating plate (50) covers the bottom wall of the groove (12), a positioning boss (13) is provided on the bottom wall of the groove (12), and the positioning boss (13) is inserted into a positioning hole (52) provided on the insulating plate (50).

6. The electrical performance test modification fixture according to claim 1, It is characterized in that The lifting device (40) further comprises: A U-shaped connecting plate (44), the upper end of the middle column (42) is connected to the bottom surface of the U-shaped connecting plate (44), the middle part of the handle (43) is hinged in the opening of the U-shaped connecting plate (44), one end of the handle (43) is a free end, and the other end is in rolling contact with the upper surface of the support seat (41) through a roller (45).

7. The electrical performance test modification fixture according to claim 1, It is characterized in that The lifting device (40) further comprises: A positioning pin (46) is arranged at the upper end of the middle column member (42); the middle column member (42) is in a cylindrical structure; and the positioning pin (46) extends out of the middle column member (42) along the radial direction of the middle column member (42).

8. The electrical performance test modification fixture according to claim 6 or 7, It is characterized in that The electrical performance test modification fixture also includes: A translation device (60), wherein the support seat (41) is arranged on the workbench (10) through the translation device (60), and the translation device (60) is used to adjust the relative position of the pin (31) located below the insulating pressure block (20) itself and the conductive contact (11).

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