Universal test fixture for multi-model magnetic resonance filters

Abstract

The application discloses a universal test fixture for multiple types of magnetic resonance filters, which comprises a bottom plate, two clamping plates arranged on the top of the bottom plate to clamp the shell of the magnetic resonance filter, and the distance between the two clamping plates is adjustable; and at least two sliding signal end clamping plates arranged on the top of the clamping plates to slide, and each sliding signal end clamping plate is fixed with a PCB plate with a BNC female seat, and the test signal of the tested magnetic resonance filter is sent to a test device through the BNC female seat and a test cable. The universal test fixture is suitable for clamping adjustment and test of different types of magnetic resonance filters, has high clamping and alignment precision, is convenient to install and disassemble, and has good mechanical contact and good electrical contact performance between the shell of the magnetic resonance filter and the test fixture, and between the signal input end and the output end of the magnetic resonance filter, and has higher test precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field, in particular to a universal test fixture for multiple types of magnetic resonance filters. BACKGROUND

[0002] At present, when testing a filter, the filter needs to be connected to a test device through the connection of a terminal, and after the test is completed, the test lines need to be disconnected one by one, which will result in low test efficiency, extreme waste of time and consumption of physical strength of the test personnel; the existing test fixture can only correspond to one type of filter, and cannot achieve a universal test fixture for different types of filters, and the replacement of the fixture will also result in repeated disconnection of the lines, which will also waste time and affect the test efficiency.

[0003] The main disadvantages are:

[0004] 1. The connection procedure is complicated and poor contact is prone to occur at the terminal;

[0005] 2. Only one fixture can correspond to one type of filter;

[0006] 3. The repeated connection and disconnection of the test cables result in low test efficiency and long test time;

[0007] 4. The test device cannot be accurately calibrated;

[0008] 5. Different cables or fixtures need to be used when measuring multiple types of filters.

[0009] In the prior art, Chinese patent ZL201921899612.3, a filter test fixture, comprising a base plate, a fixing mechanism and a clamping mechanism arranged on the top of the base plate, the fixing mechanism comprises a left fixed block and a right fixed block symmetrically arranged about the center line of the base plate, the clamping mechanism comprises a clamping block, an adjusting plate and an adjusting assembly, the clamping block is fixed on the base plate by bolts, the adjusting plate is fixed on the front end of the clamping block by bolts, the adjusting plate and the middle part of the clamping block are respectively provided with a first channel and a second channel, the adjusting assembly comprises an adjusting bolt, a plurality of springs and a clamping plate, the adjusting bolt is inserted into the second channel through the first channel, the outer end is vertically fixed with a connecting plate, the two ends of the spring are respectively fixed on the connecting plate and the clamping plate, and the left and right sides of the rear end of the clamping plate are vertically fixed with clamping rods. The new filter test fixture can fix the clamping rod by rotating the adjusting bolt, so that the filter can be fixed, the filter and the circuit board can be kept in effective contact, and the stability and accuracy of the test results are improved; the two ends of the circuit board are respectively inserted into the vertical grooves of the left fixed block and the right fixed block, which can fix the circuit board, so as to realize the test of the filter after clamping of various models, and the contact between the filter and the circuit board is more stable. However, for the magnetic resonance filter, this clamping method can only satisfy the clamping of the magnetic resonance filter shell, but it is difficult to satisfy the adjustment of the signal end of different models of the magnetic resonance filter.

[0010] In addition, although Chinese patent application CN112710912A discloses that the filter test device uses a driving device to drive a sliding block to move on a sliding rail to accurately align the filter with the product to be tested, it does not disclose the adaptability of clamping different models of filters. In addition, Chinese patent application CN109193086A discloses a cavity filter tuning device and debugging method, which adjusts the cavity filter through XYZ three-axis module and overturning module to realize automatic overturning and alignment of the cavity filter on the tuning device. However, it also cannot coordinate the adjustment of the signal end of different models of filters, and it also cannot be directly used for the adjustment of different models of magnetic resonance filters.

[0011] Therefore, the technical problem to be solved by the patent is: how to satisfy the universal clamping of various different models of magnetic resonance filters while maintaining good electrical contact performance and relatively convenient wiring performance; and how to simultaneously coordinate the clamping of the shell of the filter and the signal input end and output end of the filter. SUMMARY

[0012] In order to overcome the shortcomings of the prior art, the present application provides a magnetic resonance multi-model filter universal test fixture which has good electrical contact performance and stability, and relatively convenient wiring performance, and can satisfy the universal clamping of various different models of magnetic resonance filters.

[0013] The technical scheme adopted by the present application is:

[0014] The universal test fixture for multi-model magnetic resonance filters comprises a base plate, and further comprises:

[0015] Two clamping plates, which are arranged on the top of the base plate to clamp the shell of the magnetic resonance filter, and the distance between the two clamping plates is adjustable; and

[0016] At least two sliding signal end clamping plates, which are respectively arranged on the top of the clamping plates to slide, and a BNC female seat PCB plate is fixed on each sliding signal end clamping plate, and the BNC female seat PCB plate is used in connection with the test cable of the magnetic resonance filter.

[0017] Further, each sliding signal end clamping plate is connected with an elastic conductive device to form electrical conduction;

[0018] Each elastic conductive device comprises a metal sheet arranged on the outside of the clamping plate, an elastic bending plate arranged on the inside of the clamping plate, and a conductive bolt penetrating through the metal sheet and the elastic bending plate.

[0019] Each BNC female seat PCB plate is further connected with the surface of the corresponding metal sheet through a sliding sheet.

[0020] Further, an elastic metal supporting plate and an openable pressing plate are arranged on the top of each sliding signal end clamping plate, the test cable is placed in the elastic metal supporting plate, and the openable pressing plate tightly presses the test cable in the elastic metal supporting plate.

[0021] Further, the elastic metal supporting plate is arranged in a lifting groove on the top of the sliding signal end clamping plate, and the openable pressing plate is fixed above the lifting groove.

[0022] Further, the elastic bending plate is provided with at least one elastic protrusion bent towards the shell of the magnetic resonance filter, one end of the elastic bending plate is fixed on the top of the clamping plate, and an active gap is reserved between the other end of the elastic bending plate and the sliding signal end clamping plate.

[0023] Further, the metal sheet and the elastic bending plate are fully arranged along the length direction of the corresponding clamping plate.

[0024] Further, at least one clamping plate is provided with one or more parallel sliding rails at the bottom of the clamping plate, and the sliding rails are used for sliding adjustment of the corresponding clamping plate.

[0025] Further, the clamping plate is connected with the corresponding sliding rail on the sliding rail through a sliding block fixed at the bottom of the clamping plate, and an adjusting locking screw is installed on each sliding block.

[0026] Further, the bottom of each slide signal terminal clamp plate is also provided with a signal terminal slider for driving the slide adjustment on the top of the clamp plate, and the signal terminal slider is also provided with a signal terminal locking adjusting screw.

[0027] Further, the top of the clamp plate is provided with a slide rail and / or a slide groove for providing the slide connection of the slide signal terminal clamp plate.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] 1. The universal test clamp of the present application can meet the simultaneous clamping of the housings of filters of different sizes and the signal input and output terminals, and can be quickly and adaptively adjusted.

[0030] 2. The universal test clamp of the present application is convenient to assemble and disassemble during filter testing, and improves the detection efficiency of different types of magnetic resonance filters.

[0031] 3. The universal test clamp of the present application has firm and reliable contact points at the input and output terminals, good compression and adhesion, and no virtual connection phenomenon occurs.

[0032] 4. The universal test clamp of the present application is convenient to switch, and the adjustment of the clamp is very convenient when switching to test filters of different sizes.

[0033] 5. The universal test clamp of the present application has a wide range of adaptability and high adjustment accuracy due to the use of a double slide rail adjustment structure, and magnetic resonance filters within the size range of the length direction of the clamp plate slide rail can be applied, and the universality is strong.

[0034] 6. The universal test clamp of the present application has a simple overall structure, and the site switching between carrying the field and the field is convenient and free.

[0035] 7. The universal test clamp of the present application can effectively ensure that the connection between the test clamp and the filter is convenient and more firm.

[0036] In summary, the universal test clamp for multiple types of magnetic resonance filters of the present application can be applied to the clamping adjustment and testing of magnetic resonance filters of different types, and only simple operation is needed to realize the quick clamping and dismounting of the magnetic resonance filter, and the clamping and alignment accuracy is high, the installation and dismounting are convenient, the connection is firm and stable, the mechanical contact and electrical contact performance of the magnetic resonance filter housing and the test clamp, and the signal input and output terminals of the magnetic resonance filter are good, and the testing accuracy is higher. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1A three-dimensional structural diagram of an embodiment of a universal test fixture for multi-model magnetic resonance filters;

[0038] Figure 2 An embodiment of a universal test fixture for multi-model magnetic resonance filters; Figure 1 A partial enlarged view of A of the embodiment of

[0039] Figure 3 A partial enlarged view of B of the embodiment of Figure 1 A partial enlarged view of B of the embodiment of

[0040] Figure 4 A partial enlarged view of C of the embodiment of Figure 1 A partial enlarged view of C of the embodiment of

[0041] Figure 5 A structural diagram of an embodiment of a flexible metal supporting plate 8 and an openable pressing plate 9 of a universal test fixture for multi-model magnetic resonance filters;

[0042] Figure 6 A structural diagram of a flexible conductive device 7;

[0043] Wherein: 1 - base plate, 2 - clamping plate, 21 - sliding rail and / or sliding groove, 22 - sliding rail, 23 - sliding block, 24 - adjusting locking bolt; 3 - clamping plate, 31 - sliding rail and / or sliding groove, 32 - sliding rail, 33 - sliding block, 34 - adjusting locking bolt; 4 - fastening screw or bolt, 5 - sliding signal end clamping plate, 51 - lifting recess, 52 - signal end sliding block, 53 - signal end locking adjusting bolt; 6 - sliding signal end clamping plate, 61 - lifting recess, 62 - signal end sliding block, 63 - signal end locking adjusting bolt; 7 - flexible conductive device, 701 - metal sheet, 702 - conductive bolt, 703 - flexible bending plate, 7031 - flexible protrusion; 8 - flexible metal supporting plate, 9 - openable pressing plate, 10 - PCB board with BNC module base, 1001 - sliding sheet; 11 - magnetic resonance filter, 12 - filter signal input or output end. DETAILED DESCRIPTION

[0044] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used only to explain the present application, and cannot be understood as a limitation of the present application.

[0045] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred combination or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, during the description of the embodiments of the present application, the device position relationship of "upper", "lower", "front", "back", "left", "right" and the like in all the drawings is based on Figure 1 the standard.

[0046] As shown in Figure 1 , the multi-model magnetic resonance filter universal test fixture includes a base plate 1, and further includes:

[0047] Two clamping plates 2 and 3 are arranged at the top of the base plate 1 to clamp the shell of the magnetic resonance filter 11, and the relative distance between the two clamping plates 2 and 3 is adjustable; and

[0048] At least two sliding signal end clamping plates 5 and 6 are arranged on the top of the clamping plates 2 and 3 respectively, and a BNC female seat PCB board 10 is fixed on each of the sliding signal end clamping plates 5 and 6, which is used for connecting with the test cable of different models of magnetic resonance filter 11, and the signal end clamping plates 5 and 6 are used for sliding to correspond to the signal input and output end of the filter respectively.

[0049] As shown in Figure 1 and Figure 3 , each of the sliding signal end clamping plates 5 and 6 of the universal test fixture is connected with an elastic conductive device 7 to form electrical conduction, so as to realize the electrical conduction between the signal input and output end of the filter clamped in the two sliding signal end clamping plates 5 and 6 and the BNC female seat.

[0050] Figure 5 It is also shown in the middle that each of the elastic conductive devices 7 of the universal test fixture includes a metal sheet 701 arranged outside the clamping plates 2 and 3, an elastic bending plate 703 arranged inside the clamping plates 2 and 3, and a conductive bolt 702 penetrating through the metal sheet 701 and the elastic bending plate 703, so that the shell of the filter 11 is in electrical conduction with the shell of the BNC female seat 10; the elastic conductive device 7 is used for clamping the magnetic resonance filter 11 in the lateral direction of the clamping plates 2 and 3, so as to ensure the stability in the length direction.

[0051] As shown in Figure 1 and Figure 6As shown, each of the universal test fixture BNC female seat PCB 10 is also through a slide 1001 and its corresponding metal sheet 701 surface close contact connection, the design of the structure, so that in the test fixture work, no matter where the signal end clamp plate can better filter 11 shell through the PCB BNC female seat 10 shell and test cable shielding layer connection, improve the stability of its connection and has a better electrical connection performance.

[0052] In the specific implementation process, the slide 1001 is fixed on the BNC female seat PCB 10 by welding, and the BNC female seat PCB 10 is fixed on the sliding signal end clamp plate 5 or 6, and is fixed with the sliding signal end clamp plate 5 or 6 on the slide rail and / or groove 21 or 31, so as to ensure that no matter where the signal end clamp plate is, the elastic conductive device 7 can have better conductive connection with the metal sheet 701 and the shell of the magnetic resonance filter 11.

[0053] Figure 1 、 Figure 2 and Figure 3 In the above, it can be seen that the top of each of the sliding signal end clamp plate 5 and 6 of the universal test fixture is provided with an elastic metal plate 8 and an openable pressing plate 9, the filter signal input or output end 12 is placed in the elastic metal plate 8, and the openable pressing plate 9 tightly presses and clamps the filter signal input or output end 12 in the elastic metal plate 8. Since the elastic metal plate 8 has a certain compression amount, the diameter of the filter signal input or output end 12 placed therein can be adaptively changed, so that the elastic metal plate 8 can be tightly pressed with the openable pressing plate 9 to a series of filter signal input or output ends 12 of different diameters, and the application range is wider. In the manufacturing process, the elastic metal plate 8 can be made of elastic materials such as spring steel, or can be made of ordinary steel but has a certain compression amount, or can be made of aluminum, magnesium alloy, etc.

[0054] Figure 2 and Figure 3It is also shown that the elastic metal supporting plate 8 of the universal test fixture is placed in the lifting groove 51 and 61 on the top of the sliding signal terminal clamping plate 5 and 6, and the openable pressing plate 9 is fixed above the lifting groove 51 and 61, which can effectively enhance the overall connection performance, safety performance and connection stability of the entire sliding signal terminal clamping plate 5 and 6. In the specific implementation process, the number of elastic metal supporting plates 8 is one or two, and when there are two, the two elastic metal supporting plates 8 are embraced to form a circular ring structure, which realizes the clamping of the filter signal input or output end. This structure has better clamping performance and can stably clamp the filter signal input or output end. It is used to connect with the filter signal end and maintain good electrical contact. Since there are various models of filters, the size and diameter of the bolts of the signal end are inconsistent. The spring metal supporting plate can be connected with signal ends of different diameters through spring expansion, and a larger range of test circuit fluctuations can be used, and the use range is wider.

[0055] As shown in Figure 5 , the openable pressing plate 9 can be provided as a hinge structure of a buckling plate. When the openable pressing plate 9 is folded, that is, the buckling plate is folded, the filter signal input or output end 12 of the magnetic resonance filter 11 is pressed tightly; when the openable pressing plate 9 is opened, the filter signal input or output end 12 can be taken out at will.

[0056] The elastic bending plate 703 of the universal test fixture is provided with at least one elastic protrusion 7031 bent towards the shell of the magnetic resonance filter 11, and one end thereof is fixed on the top of the clamping plate 2 and 3, and the other end thereof leaves a movable gap between the sliding signal terminal clamping plate 5 and 6. In the specific implementation, the elastic bending plate 703 is generally made of wear-resistant steel or spring steel, alloy, etc., so that when the elastic bending plate 703 is pressed from the filter 11, it can be tightly pressed against the filter 1, realizing stable and good electrical conduction.

[0057] The metal sheet 701 and the elastic bending plate 703 of the universal test fixture are full of along the length direction of the corresponding clamping plate 2 and 3, thereby enhancing the sliding adjustment range of the sliding signal terminal clamping plate 5 and 6, so that the sliding signal terminal clamping plate 5 and 6 can be adjusted in the entire length direction, and stable electrical conduction can be realized no matter where it is adjusted, ensuring stable input and output of the filter signal and finally ensuring stable testing. In the specific implementation process, the metal sheet 701 is generally fixed on the sliding rail and / or sliding groove 21 and 31 of the clamping plate 2 or 3 by using a fastening screw or bolt 4, and welding, riveting and other connection methods can also be used.

[0058] From Figure 1 , Figure 2 , and Figure 4As can be seen, at least one of the clamping plates 2 and 3 of the universal test fixture is provided with one or more parallel sliding rails 22 and 32 at the bottom thereof, which sliding rails 22 and 32 are used to slide and adjust the corresponding clamping plate 2 or 3, so that the distance between the two clamping plates 2 and 3 can be stably adjusted to adapt to the clamping of filters 11 of different models and sizes, and when the number of each clamping plate 2 or 3 is two or more, the sliding rails are parallel to each other to facilitate the position adjustment of each clamping plate 2 and / or 3.

[0059] In a preferred embodiment, the clamping plates 2 and 3 of the universal test fixture are connected to the corresponding sliding rails 22 and 32 by sliding blocks 23 and 33 fixed at the bottom thereof, and each of the sliding blocks 23 and 33 is provided with an adjusting locking bolt 24 and 34, and in operation, by loosening the corresponding adjusting locking bolt 24 and 34, the corresponding sliding block is opened, and then the relative distance of the clamping plate 2 or 3 is adjusted, and after the adjustment is completed, it is locked, so as to achieve the purpose of timely adjusting the mutual distance between the clamping plates 2 and 3 and timely locking for quick adjustment, and the use is convenient and fast.

[0060] From Figure 1 、 Figure 2 and Figure 3 As can be seen, each of the sliding signal end clamping plates 5 or 6 of the universal test fixture is also provided with a signal end sliding block 52 and 62 at the bottom thereof for sliding and adjusting the clamping plate 2 and 3 at the top thereof, and the signal end sliding block 52 and 62 is also provided with a signal end locking adjusting bolt 53 and 63 to realize the position adjustment of the sliding signal end clamping plate 5 and 6.

[0061] In the above view, the clamping plates 2 and 3 of the universal test fixture are provided with sliding rails and / or sliding grooves 21 and 31 at the top thereof for sliding and connecting the sliding signal end clamping plates 5 and 6, so as to further improve the sliding stability and good electrical connection performance of the sliding signal end clamping plates 5 and 6.

[0062] The universal test fixture for multiple models of magnetic resonance filters of the present application, in operation:

[0063] By adjusting the locking bolt 24 (and / or 34) fixed on the slider 23 (and / or 34) can be free forward and backward on the guide rail 22 (32), the distance between the plate 3 and the plate 2 is adjusted to the size of the magnetic resonance filter 11 to be clamped, locking the locking bolt 24 (and / or 34), then adjust the signal end locking adjusting bolt 53 and 63, the signal end plate 5 and the signal end plate 6 slide left and right, slide to just correspond to the signal input and output end of the magnetic resonance filter 11 respectively, lock the signal end locking adjusting bolt 53 and 63, insert the magnetic resonance filter 11 into the clamp, cover the openable pressing plate 9 on the top of the signal end plate, the filter signal input or output end 12 is connected with the PCB board 10 with BNC female seat at both ends of the clamp, start testing the indicators of the magnetic resonance filter 11.

[0064] After testing, replace, then reverse unlock: first unlock the signal end locking adjusting bolt 53 and 63, then unlock the locking bolt 24 (and / or 34), and then remove the magnetic resonance filter 11.

[0065] The embodiments of the present application disclose the preferred embodiments, but are not limited thereto, and those skilled in the art can easily understand the spirit of the present application according to the above embodiments, and make different inferences and changes, as long as they do not deviate from the spirit of the present application, they are within the protection scope of the present application.

Claims

1. A universal test fixture for multi-model magnetic resonance filters comprising a base plate (1), characterized in that, Also comprising: Two clamping plates (2, 3), two said clamping plates (2, 3) are arranged on the top of the base plate (1) to form a clamping to the shell of the magnetic resonance filter (11), and the relative distance between the two said clamping plates (2, 3) is adjustable; And At least two sliding signal end clamping plates (5, 6), at least two said sliding signal end clamping plates (5, 6) are arranged on the top of the clamping plate (2, 3) to slide, and a BNC female seat PCB board (10) is fixed on each said sliding signal end clamping plate (5, 6), said BNC female seat PCB board (10) is used for connecting with test cable of different models of magnetic resonance filter (11); Each said sliding signal end clamping plate (5, 6) is connected with elastic conductive device (7) to form electrical conduction; Each said elastic conductive device (7) comprises a metal sheet (701) arranged outside the clamping plate (2, 3), an elastic bending plate (703) arranged inside the clamping plate (2, 3), and a conductive bolt (702) penetrating through the metal sheet (701) and the elastic bending plate (703); Each said BNC female seat PCB board (10) is further connected with the surface of said metal sheet (701) through a sliding sheet (1001) in close contact; The top of each said sliding signal end clamping plate (5, 6) is provided with an elastic metal supporting plate (8) and an openable pressing plate (9).

2. The universal test fixture for multiple models of magnetic resonance filters according to claim 1, wherein: The elastic metal supporting plate (8) is arranged to hold the filter signal input or output end (12), and the openable pressing plate (9) tightly presses the filter signal input or output end (12) on the elastic metal supporting plate (8).

3. The universal test fixture for multiple models of magnetic resonance filters according to claim 2, wherein: The elastic metal supporting plate (8) is arranged in a lifting groove (51, 61) on the top of the sliding signal end clamping plate (5, 6), and the openable pressing plate (9) is fixed above the lifting groove (51, 61).

4. The universal test fixture for multiple models of magnetic resonance filters according to claim 3, wherein: The elastic bending plate (703) is provided with at least one elastic protrusion (7031) bent towards the shell of the magnetic resonance filter (11), and one end of the elastic bending plate (703) is fixed on the top of the clamping plate (2, 3), and the other end of the elastic bending plate (703) is arranged with a movable gap between the sliding signal end clamping plate (5, 6).

5. The universal test fixture for multiple models of magnetic resonance filters according to claim 4, wherein: The metal sheet (701) and the elastic bending plate (703) are arranged along the length direction of the corresponding clamping plate (2, 3).

6. The universal test fixture for multiple models of magnetic resonance filters according to any one of claims 1-5, wherein: At least one said clamping plate (2, 3) is provided with one or more parallel sliding rails (22, 32) on the bottom, and the sliding rails (22, 32) are used for sliding adjustment of the corresponding clamping plate (2, 3).

7. The universal test fixture for multi-model magnetic resonance filters according to claim 6, characterized in that: the clamping plates (2, 3) are connected to the corresponding sliding rails (22, 32) by means of sliders (23, 33) fixed to the bottom of the clamping plates, and each of the sliders (23, 33) is provided with an adjusting locking screw (24, 34).

8. The universal test fixture for multi-model magnetic resonance filters according to claim 7, characterized in that: each of the sliding signal terminal clamping plates (5, 6) is also provided at the bottom with a signal terminal slider (52, 62) for sliding adjustment on the top of the clamping plates (2, 3), and the signal terminal slider (52, 62) is also provided with a signal terminal locking adjusting screw (53, 63).

9. The universal test fixture for multi-model magnetic resonance filters according to claim 8, characterized in that: the clamping plates (2, 3) are provided at the top with sliding rails and / or sliding grooves (21, 31) for the sliding connection of the sliding signal terminal clamping plates (5, 6).

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