Filter testing device

Abstract

The utility model is suitable for the technical field of detection equipment, and provides a filter testing device, which comprises a shielding main body, a product positioning seat, a high-frequency testing plate and a connecting assembly. The high-frequency test board is connected with an external test circuit or a test device, a product can be placed in the positioning groove when the product is tested, at the moment, the detection end of the product is connected with the high-frequency test board through the connecting assembly, and meanwhile grounding connection of the product is achieved through the grounding part. Compared with a testing device in the prior art, the product can be connected with a testing circuit or testing equipment by placing the product in the positioning groove in the product positioning seat, so that the product can be tested more quickly and conveniently, and the structure is small, exquisite and simple. And meanwhile, the product positioning seat, the high-frequency test board and the product in the test process are all arranged in the shielding groove, so that external electromagnetic radiation can be shielded, the influence of the external electromagnetic radiation on a test result is avoided, and the test result is more accurate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of test equipment, especially relates to a filter testing device. BACKGROUND

[0002] With the development of integrated electronic circuit, people's requirement to electromagnetic compatibility is also higher and higher, and as the power port's ultra-small power EMI (Electromagnetic Interference Filter) filter, the suppression range is promoted from kilohertz (KHz) to gigahertz (GHz) above, therefore the insertion loss value becomes the important index of the evaluation power EMI filter suppression performance. But the insertion loss value of filter is tested mostly to have the problems, such as complicated operation and low efficiency. SUMMARY

[0003] The utility model discloses a filter testing device, which aims to solve the technical problems of complicated loss test operation and low efficiency in the prior art.

[0004] The utility model discloses a filter testing device, which aims to solve the technical problems of complicated loss test operation and low efficiency in the prior art.

[0005] In an optional embodiment, the connection assembly includes an elastic guide pin, the product positioning seat is provided with a avoiding structure, the first end of the elastic guide pin is connected to the high-frequency test board, the second end of the elastic guide pin extends to the positioning recess through the avoiding structure, and is used for abutting against the detection end of the product after the product is placed in the positioning recess.

[0006] In an optional embodiment, the outside of the elastic guide pin is sleeved with an insulating sleeve, and the insulating sleeve is used to avoid the contact between the elastic guide pin and the product positioning seat.

[0007] In an alternative embodiment, the product positioning seat comprises a bottom plate part and a cover plate part, the bottom plate part is arranged above the high-frequency test board, the cover plate part covers the top of the bottom plate part, the cover plate part has a relief hole matching the shape of the product, and the side wall of the relief hole and at least part of the bottom surface of the bottom plate part form the positioning recess.

[0008] In an alternative embodiment, the product positioning seat further comprises a plurality of elastic top pins, the plurality of elastic top pins are located between the bottom plate part and the cover plate part, the bottom plate part and the cover plate part are provided with mounting recesses for accommodating and fixing the elastic top pins, and the movable end of the elastic top pin extends into the positioning recess to form the grounding part.

[0009] In an alternative embodiment, the bottom surface of the positioning recess is further provided with a grounding conductive gasket, and the grounding conductive gasket is used to abut against the bottom surface of the product after the product is placed in the positioning recess to increase the grounding area of the product.

[0010] In an alternative embodiment, the shielding body is provided with detection connectors on both sides, and the detection connectors are used to connect the high-frequency test board with external circuits.

[0011] In an alternative embodiment, the filter test device further comprises a pressing support, a pressing piece and a driving structure, the pressing piece is movably arranged on the pressing support and located above the positioning recess, the driving structure is arranged on the pressing support and connected with the pressing piece at the driving end, and the driving structure is used to drive the pressing piece away from or close to the product.

[0012] In an alternative embodiment, the working end of the pressing piece is provided with a buffer part, and the buffer part is used to avoid damage to the product caused by the pressing piece.

[0013] In an alternative embodiment, the driving structure comprises a hinge and a rotating handle, one end of the rotating handle is rotatably connected to the pressing support, one end of the hinge is hinged to the rotating handle, and the other end of the hinge is hinged to the pressing piece.

[0014] The technical effect of the utility model compared with prior art is: through setting shielding recess on shielding main body, and setting high frequency test board on bottom of shielding recess, setting product positioning seat on high frequency test board, setting positioning recess for containing positioning product on product positioning seat. Simultaneously, setting grounding part on sidewall and / or bottom surface of positioning recess, when product is placed in positioning recess, connecting test end of product with high frequency test board through connecting assembly, realizing grounding connection of product through grounding part and grounding end of product. Connecting high frequency test board with external test circuit or test device, when testing product, placing product in positioning recess, connecting test end of product with high frequency test board through connecting assembly, simultaneously realizing grounding connection of product through grounding part. Compared with test device in the art, placing product in positioning recess on product positioning seat can realize connection of product with test circuit or test device, making product testing more convenient and simple. Simultaneously, setting product positioning seat, high frequency test board and product in shielding recess during product testing, shielding external electromagnetic radiation, avoiding influence of external electromagnetic radiation on test result, making test result more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments of the utility model or prior art description, obviously, the following described drawings are only some embodiments of the utility model, for the ordinary skilled in the art, under the premise of not paying creative labor, other drawings can also be obtained according to these drawings.

[0016] Figure 1 It is the structure schematic diagram of filter test device provided by the embodiments of the utility model;

[0017] Figure 2 It is the partial sectional structure schematic diagram of filter test device provided by the embodiments of the utility model;

[0018] Figure 3 It is Figure 2 The enlarged structure schematic diagram of A in

[0019] Figure 4 It is the structure schematic diagram of product positioning seat adopted by the embodiments of the utility model;

[0020] Figure 5 It is the schematic diagram of detection circuit used by the embodiments of the utility model.

[0021] BRIEF DESCRIPTION OF DRAWINGS:

[0022] 100, filter test fixture; 200, receiver; 300, test line; 400, signal generator; 500, product;

[0023] 1, shielding body; 11, shielding groove; 2, product positioning seat; 21, bottom plate part; 22, cover plate part; 23, elastic top pin; 24, positioning groove; 25, grounding part; 3, high-frequency test board; 4, connecting assembly; 41, elastic guide needle; 42, insulating sleeve; 5, grounding conductive gasket; 6, detection connector; 7, pressing support; 8, driving structure; 81, hinged piece; 82, rotating handle 9, pressing piece; 10, buffer part. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0025] In the description of the present application, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" 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 therefore cannot be understood as indicating or implying that the devices or elements indicated 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.

[0026] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the utility model is further described in detail below in combination with the drawings and examples.

[0029] Please refer to Figures 1 to 4 As shown in the utility model embodiment, a filter testing device is provided, and the filter testing device comprises a shielding main body, a product positioning seat, a high-frequency test plate and a connecting assembly; the shielding main body is provided with a shielding groove; the high-frequency test plate is arranged in the shielding groove and located at the bottom surface of the shielding groove; the product positioning seat is installed on the high-frequency test plate and located in the shielding groove; the product positioning seat is provided with a positioning groove for accommodating a product; the connecting assembly is used for connecting the detection end of the product with the high-frequency test plate after the product is placed in the positioning groove; and the side wall and / or the bottom surface of the positioning groove are provided with a grounding portion, which is used for abutting against the grounding end of the product after the product is placed in the positioning groove, so as to realize the grounding connection of the product.

[0030] Specifically, the shielding main body refers to a component that can shield electromagnetic signals, and the shielding main body is usually block-shaped; the shielding groove refers to a groove structure arranged on the shielding main body, and the shielding groove is generally recessed on the top surface of the shielding main body. In order to improve the shielding effect of the shielding main body, the shielding main body can be made of metal materials such as aluminum, and the shielding groove can be machined on the shielding main body. Meanwhile, a gold plating layer can be arranged on the surface of the shielding main body and the inner wall of the shielding groove to improve the oxidation resistance and shielding effect of the shielding main body. The product positioning seat refers to a component with a certain height, and the product positioning seat can be block-shaped, plate-shaped or combined in multiple shapes. After the product positioning seat is installed, the top surface of the product positioning seat is generally lower than the mouth position of the shielding groove. The positioning groove refers to a groove component with a certain depth arranged on the product positioning seat, and the shape of the positioning groove matches the product.

[0031] The high-frequency test board refers to a kind of circuit board specially used for high-frequency signal test. It is mainly used for testing the performance of high-frequency electronic components, circuit modules and high-frequency communication systems in high-frequency environment. The high-frequency range usually refers to the frequency band of hundreds of MHz to tens of GHz or even higher. The high-frequency test board can be made of gold-plated layer on the surface of high-frequency ceramic board, which can improve the anti-interference ability of the test device under high frequency and reduce the overall internal resistance of the test device. The connecting assembly refers to a component that can electrically connect two components. The connecting assembly can be a column, a rod or a strip. The connecting assembly can also be a flexible connecting line. The connecting assembly can be made of metal or other conductive materials. The connecting assembly can be arranged on the product positioning seat, and the product positioning seat can be independent of the product positioning seat. The grounding part refers to a component with a certain volume. The grounding part can be block-shaped, plate-shaped or hemispherical. The grounding part itself is generally a conductor, such as metal or graphite. At least part of the grounding part needs to be grounded.

[0032] The filter test device provided by the embodiment of the utility model, through setting shielding recess on shielding main part, and setting high-frequency test board on the bottom of shielding recess, setting product positioning seat on high-frequency test board, setting positioning recess for containing positioning product on product positioning seat. At the same time, the side wall and / or bottom surface of the positioning recess is provided with a grounding part. When the product is placed in the positioning recess, the test end of the product is connected to the high-frequency test board through the connecting assembly, and the grounding end of the product is connected to the grounding part to realize the grounding connection of the product. By connecting the high-frequency test board with the external test circuit or test device, the product can be placed in the positioning recess during testing. At this time, the test end of the product is connected to the high-frequency test board through the connecting assembly, and the grounding connection of the product is realized through the grounding part. Compared with the test device in the prior art, the product is placed in the positioning recess on the product positioning seat to realize the connection between the product and the test circuit or test device, so that the product testing is more convenient and fast, and the structure is small and simple. At the same time, the product positioning seat, the high-frequency test board and the product during testing are all arranged in the shielding recess, which can shield external electromagnetic radiation, avoid the influence of external electromagnetic radiation on the test result, and make the test result more accurate.

[0033] In one embodiment, please refer to Figure 2 and Figure 3The connecting assembly comprises an elastic guide needle, the product positioning seat is provided with an avoiding structure, the first end of the elastic guide needle is connected to the high-frequency test plate, the second end of the elastic guide needle extends into the positioning groove through the avoiding structure, and is used for abutting against the detection end of the product after the product is placed into the positioning groove. Specifically, the elastic guide needle refers to a columnar component that can stretch and retract. The elastic guide needle can comprise a needle rod, a needle head and an elastic member. The needle head is coaxially and movably connected to the needle rod, and the elastic member is arranged between the needle rod and the needle head, so that the needle head part of the elastic guide needle has the performance of stretching and retracting. One end (the needle rod part) of the elastic guide needle is connected to the high-frequency test plate, the second end (the needle head part) of the elastic guide needle extends into the positioning groove through the avoiding structure, and the position of the second end of the elastic guide needle matches the position of the detection end of the product after the product is placed into the positioning groove. After the product is placed into the positioning groove, the second end of the elastic guide needle abuts against the detection end of the product, achieving the purpose of quickly connecting the detection end of the product to the high-frequency test plate, and making the product detection step more simple and convenient. At the same time, the elastic guide needle itself has elasticity, can always keep the elastic guide needle and the detection end of the product in close abutment, and also ensures that the second end of the elastic guide needle and the detection end of the product have good and effective contact, reducing test loss.

[0034] In addition, by arranging the avoiding structure such as the avoiding hole or the avoiding groove on the product positioning seat, the second end of the elastic guide needle can extend into the positioning groove through the avoiding structure, and the product positioning seat is generally a metal material component. When the second end of the elastic guide needle passes through the avoiding structure, the product positioning seat can also shield external electromagnetic radiation, avoiding the influence of external electromagnetic radiation on the test result.

[0035] In one embodiment, referring to Figure 3 An insulating sleeve is sleeved outside the elastic guide needle, and the insulating sleeve is used for avoiding contact between the elastic guide needle and the product positioning seat. Specifically, the insulating sleeve refers to a columnar component with a certain height, and a containing hole for containing the elastic guide needle is arranged in the insulating sleeve. The insulating sleeve can generally be made of insulating materials such as rubber, ceramic or plastic. By sleeving the insulating sleeve outside the elastic guide needle, the elastic guide needle can avoid contacting the product positioning seat when passing through the avoiding structure.

[0036] In an optional embodiment, referring to Figure 3 The avoiding structure is an avoiding hole, and the insulating sleeve is installed in the avoiding hole and the outer diameter of the insulating sleeve matches the outer diameter of the avoiding hole. At this time, the insulating sleeve can support and limit the elastic guide needle, avoiding bending of the elastic guide needle due to excessive force during work.

[0037] In one embodiment, referring to Figure 2 And Figure 4The product positioning seat comprises a bottom plate part and a cover plate part. The bottom plate part is arranged above the high-frequency test board. The cover plate part is arranged above the bottom plate part. The cover plate part is provided with a relief hole matched with the shape of the product. The side wall of the relief hole and at least part of the bottom surface of the bottom plate part form a positioning groove. Specifically, the bottom plate part and the cover plate part are components with a certain volume. The bottom plate part and the cover plate part can be block-shaped or plate-shaped. The bottom plate part is arranged above the high-frequency test board. The cover plate part is arranged above the bottom plate part to form the product positioning seat. The cover plate part is provided with a relief hole matched with the shape of the product. The side wall of the relief hole and at least part of the bottom surface of the bottom plate part form a positioning groove. The overall structure of the product positioning seat is simple. The assembly of the product positioning seat is convenient.

[0038] Based on the above-mentioned features of the bottom plate part and the cover plate part, please refer to Figure 4 The product positioning seat further comprises a plurality of elastic top pins. The plurality of elastic top pins are located between the bottom plate part and the cover plate part. The bottom plate part and the cover plate part are provided with mounting grooves for accommodating and fixing the elastic top pins. The movable end of the elastic top pin extends into the positioning groove to form a grounding part. Specifically, the elastic top pin is a columnar component with a certain elasticity. The elastic top pin is usually composed of a pin body and an elastic element. The end region of the elastic top pin can move under the action of the elastic element to form a movable end. The elastic top pin is clamped between the bottom plate part and the cover plate part. The bottom plate part and the cover plate part are provided with mounting grooves for accommodating and fixing the elastic top pin. The installation and fixation of the elastic top pin are more firm. In addition, the movable end of the elastic top pin extends into the positioning groove to form a grounding part. Since the elastic top pin has a certain elasticity, the grounding part can always maintain good contact with the product through the elastic effect of the elastic top pin.

[0039] In one embodiment, please refer to Figure 4 The bottom surface of the positioning groove is further provided with a grounding conductive gasket. The grounding conductive gasket is used to abut against the bottom surface of the product after the product is placed in the positioning groove to increase the grounding area of the product. Specifically, the grounding conductive gasket is a component used in electrical equipment and systems. Its main function is to provide good electrical connection and ensure the grounding of the equipment. It can reliably connect the metal shell of the equipment or other parts that need to be grounded with the ground or grounding system. The bottom surface of the positioning groove is provided with a grounding conductive gasket. The grounding conductive gasket can abut against the bottom surface of the product after the product is placed in the positioning groove to increase the grounding area of the product, so that the grounding effect of the product is better.

[0040] In one embodiment, please refer to Figure 1 and Figure 2The two sides of the shielding body are provided with detection connectors for connecting the high-frequency test board with external circuits. Specifically, the detection connector refers to a component that can be electrically connected with other plug-in structures. A connecting through hole can be provided on the shielding body. The detection connector is installed on the side of the shielding body, and then a wire is passed through the connecting through hole to connect the detection connector with the high-frequency test board. Finally, the high-frequency test board is connected with external circuits through the detection connector. The detection connector is provided on the outside of the shielding body, so that the high-frequency test board is more convenient to connect with external circuits.

[0041] In one embodiment, referring to Figure 1 The filter test device further comprises a pressing support, a pressing piece and a driving structure. The pressing piece is movably arranged on the pressing support and located above the positioning groove. The driving structure is arranged on the pressing support and connected with the pressing piece at the driving end for driving the pressing piece away from or close to the product. Specifically, the pressing support refers to a support component with a certain height. The pressing support can be block-shaped, plate-shaped or combined in multiple shapes. The pressing piece refers to a component with a certain volume. The pressing piece can be columnar, block-shaped or combined in multiple shapes. The driving structure refers to a component or assembly for driving the movement of the body. The driving structure can be a pneumatic cylinder, a hydraulic cylinder or an electric push rod, etc. The driving structure can also be driven manually. By movably arranging the pressing piece on the pressing support and locating the pressing piece above the positioning groove, and by arranging the driving structure on the pressing support and connecting the driving end of the driving structure with the pressing piece, the product can be placed in the positioning groove. Then, the pressing piece is driven by the driving structure to press against the product, so that the product is more firmly installed in the positioning groove. At the same time, the contact between the product and the connecting assembly and the grounding part is better, and the internal resistance after the product is connected is reduced, and the internal loss is reduced.

[0042] In one embodiment, referring to Figure 1 The working end of the pressing piece is provided with a buffer part for avoiding damage to the product by the pressing piece. Specifically, the buffer part refers to an elastic component with a certain volume. The buffer part can be block-shaped, columnar or combined in multiple shapes. The material of the buffer part can be rubber, polyurethane or plastic, etc. By arranging the buffer part at the working end of the pressing piece, the product can be buffered when the pressing piece is pressed tightly to avoid the product being damaged by the pressing piece, thereby improving the safety of product detection.

[0043] In one embodiment, referring to Figure 1The driving structure comprises a hinge and a rotating handle, one end of the rotating handle is rotatably connected to the pressing support, one end of the hinge is hingedly connected to the rotating handle, and the other end of the hinge is hingedly connected to the pressing piece. Specifically, the hinge refers to a component with a certain volume, the rotating handle refers to a rod-shaped component with a certain length, by hingedly connecting one end of the hinge to the rotating handle and hingedly connecting the other end of the hinge to the pressing piece, when the pressing piece needs to be driven to move, the rotating handle can be driven to move, and the pressing piece is pushed to move by the lever action of the hinge, so that the driving of the pressing piece to move is more convenient and labor-saving.

[0044] The above is only a preferred embodiment of the present application, and only the technical principle of the present application is specifically described, and these descriptions are only for explaining the principle of the present application, and cannot be explained as the limitation of the protection scope of the present application in any way. Based on the explanation herein, any modification, equivalent replacement and improvement within the spirit and principle of the present application, and other specific embodiments of the present application that can be thought by those skilled in the art without creative labor, should be included in the protection scope of the present application.

Claims

1. A filter test apparatus, characterized by, The shielding body has a shielding groove, the high-frequency test board is arranged in the shielding groove, the product positioning seat is installed on the high-frequency test board and located in the shielding groove, the product positioning seat has a positioning groove for accommodating a product, the connecting assembly is used for connecting a detection end of the product with the high-frequency test board after the product is placed in the positioning groove, and a side wall and / or a bottom surface of the positioning groove is provided with a grounding portion for abutting against a grounding end of the product after the product is placed in the positioning groove to realize grounding connection of the product.

2. The filter test apparatus of claim 1, wherein, The connecting assembly comprises an elastic guide pin, the product positioning seat is provided with a avoiding structure, a first end of the elastic guide pin is connected to the high-frequency test board, and a second end of the elastic guide pin extends into the positioning groove through the avoiding structure and is used for abutting against the detection end of the product after the product is placed in the positioning groove.

3. The filter test apparatus of claim 2, wherein, An insulating sleeve is sleeved on the outside of the elastic guide pin, and the insulating sleeve is used for avoiding contact between the elastic guide pin and the product positioning seat.

4. The filter test apparatus of claim 2, wherein, The product positioning seat comprises a bottom plate portion and a cover plate portion, the bottom plate portion is arranged above the high-frequency test board, the cover plate portion covers the top of the bottom plate portion, the cover plate portion has an avoiding hole matched with the shape of the product, and a side wall of the avoiding hole and at least part of a bottom surface of the bottom plate portion surround to form the positioning groove.

5. The filter test apparatus of claim 4, wherein, The product positioning seat further comprises a plurality of elastic top pins, the plurality of elastic top pins are located between the bottom plate portion and the cover plate portion, the bottom plate portion and the cover plate portion are provided with mounting grooves for accommodating and fixing the elastic top pins, and movable ends of the elastic top pins extend into the positioning groove to form the grounding portion.

6. The filter test apparatus of claim 5, wherein, A grounding conductive gasket is further arranged on the bottom surface of the positioning groove, and the grounding conductive gasket is used for abutting against the bottom surface of the product after the product is placed in the positioning groove to increase the grounding area of the product.

7. The filter test apparatus of claim 1, wherein, Detection connectors are arranged on both sides of the shielding body, and the detection connectors are used for connecting the high-frequency test board with external circuits.

8. The filter test device of any one of claims 1 to 6, wherein, The filter test device further comprises a pressing support, a pressing piece and a driving structure, the pressing piece is movably arranged on the pressing support and located above the positioning groove, the driving structure is arranged on the pressing support and connected with the pressing piece at a driving end, and is used for driving the pressing piece away from or close to the product.

9. The filter test apparatus of claim 8 wherein, A buffer portion is arranged at a working end of the pressing piece, and the buffer portion is used for avoiding damage to the product caused by the pressing piece.

10. The filter test apparatus of claim 9, wherein, The driving structure comprises a hinge piece and a rotating handle, one end of the rotating handle is rotatably connected to the pressing support, one end of the hinge piece is hinged to the rotating handle, and the other end of the hinge piece is hinged to the pressing piece.

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