CN208847795U - A kind of common-mode noise test fixture - Google Patents
A kind of common-mode noise test fixture Download PDFInfo
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- CN208847795U CN208847795U CN201821526441.5U CN201821526441U CN208847795U CN 208847795 U CN208847795 U CN 208847795U CN 201821526441 U CN201821526441 U CN 201821526441U CN 208847795 U CN208847795 U CN 208847795U
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- shielding
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- pedestal
- shielding box
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Abstract
The utility model provides a kind of common-mode noise test fixture, including common mode test cell and shielding box, the common mode test cell includes common mode measurement circuit plate, golden finger socket connects pedestal with RF coaxial, the shielding box includes shielding pedestal, shielding box cover and several radiofrequency signal coaxial connectors, a left side for the shielding pedestal, right side wall, which extends internally, is equipped with shielding mounting base, the common mode measurement circuit plate is fixed in two shielding mounting bases, before several radiofrequency signal coaxial connectors are separately fixed at the shielding pedestal, on rear wall, and one end of the radiofrequency signal coaxial connector connect pedestal with the RF coaxial and is connected, the shielding box cover lid conjunction forms the closed shielding box on the shielding pedestal.The utility model uses double layer screen box, and shield effectiveness is good and strong antijamming capability comes into full contact with using golden finger socket and effect is good.
Description
Technical field
The utility model relates to test fixture technical field more particularly to a kind of common-mode noise test fixtures.
Background technique
Existing common-mode noise test fixture resistance outside invading signal interference ability is poor, and interference signal can be directly defeated from signal
Enter to output end, test waveform easily deviates true value；In addition, jig generally uses probe to contact, tip and production by probe
The contact of the bottom surface product PIN, contact surface is small, and contact point is disturbed (dust, oxide, foul etc.) and test value is caused to deviate；Meanwhile it penetrating
Frequency signal coaxial connector uses the copper wire or PVC of normal tape shielding line, and such linear resistivity is poor, and line is ineffective, decaying
Signal is serious, test data distortion.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of common-mode noise test fixture, using bilayer screen
Box is covered, shield effectiveness is good and strong antijamming capability comes into full contact with using golden finger socket and effect is good, radiofrequency signal coaxially connects
Device is connect using RF coaxial connection cables, resistivity is low and line effect is good.
The utility model provides following technical scheme, a kind of common-mode noise test fixture, including common mode test cell and screen
Cover box, the common mode test cell includes common mode measurement circuit plate and the golden finger that is welded on the common mode measurement circuit plate
Socket connects pedestal with RF coaxial, and the back side of the common mode measurement circuit plate is placed with test circuit；The shielding box includes
Pedestal, shielding box cover and several radiofrequency signal coaxial connectors are shielded, the left and right side walls of the shielding pedestal, which extend internally, to be set
There is shielding mounting base, the common mode measurement circuit plate is separately fixed at two shielding mounting bases by several fastening screws
On, and the through slot for accommodating the test circuit is equipped between two shielding mounting bases；Several radiofrequency signals coaxially connect
Connect device be separately fixed at it is described shielding pedestal forward and backward side wall on, and one end of the radiofrequency signal coaxial connector with it is described
RF coaxial connects pedestal and is connected, and the shielding box cover lid conjunction forms the closed shielding box on the shielding pedestal.
Further, the radiofrequency signal coaxial connector include RF coaxial coupling, RF coaxial connection cables and
RF coaxial nipple, the RF coaxial coupling are fixed on the forward and backward side wall of the shielding pedestal, the RF coaxial
Nipple connect with the RF coaxial whorl of base connection, the both ends of the RF coaxial connection cables respectively with the radio frequency
Coaxial coupling is connected with the RF coaxial nipple.
Preferably, one end of the shielding mounting base is equipped with wiring notch.
Further, the shielding box cover is equipped with the mounting hole to match with the golden finger socket, the shielding box
Lid lid closes on the shielding pedestal, and the golden finger socket exposes to the shielding box by the mounting hole.
Further, the shielding box cover is fixed in the shielding mounting base by several fastening screws.
Further, the contact flat spring being oppositely arranged there are two being set in the golden finger socket.
Preferably, the common mode measurement circuit plate is coated with copper film other than the test circuit.
Further, the bottom wall of the shielding pedestal, which extends to be equipped with to two sides, is connected and fixed plate, described to be connected and fixed on plate
Equipped with fixation hole.
The utility model has the following beneficial effects: compared with prior art, the left and right side walls for shielding pedestal, which extend internally, to be set
There is shielding mounting base, only the through slot of reserved accommodating test circuit, space is minimum, reduces extraneous signal interference；Using golden finger
Socket, two face contacts, elastic force is abundant, effect is good, wear-resisting practical and plug restores fast；Radiofrequency signal coaxial connector uses radio frequency
Coaxially connected cable, resistivity is good, and line effect is good, and signal decaying is weak, and test data is true.
Detailed description of the invention
Fig. 1 is the decomposition diagram of common-mode noise test fixture described in the utility model；
Fig. 2 is the perspective view of common-mode noise test fixture described in the utility model；
Fig. 3 is the bottom view of common mode test cell described in the utility model；
Fig. 4 is the structural schematic diagram of golden finger socket described in the utility model.
Description of symbols:
Common mode test cell 1, common mode measurement circuit plate 11, golden finger socket 12, contact flat spring 121, RF coaxial connection
Pedestal 13 tests circuit 14.
Shielding box 2 shields pedestal 21, shields mounting base 211, and through slot 2111 is routed notch 2112, is connected and fixed plate 212,
Fixation hole 2121, shielding box cover 22, mounting hole 221, radiofrequency signal coaxial connector 23, RF coaxial coupling 231, radio frequency is same
Axis connection cable 232, RF coaxial nipple 233.
Fastening screw 3.
Specific embodiment
In order to make the purpose of utility model of the utility model, technical solution and technical effect are more clearly understood, tie below
Specific embodiment is closed to be described further the utility model.It should be understood that specific embodiment described herein, be only used for
It explains the utility model, is not used to limit the utility model.
Referring to figs. 1 to Fig. 3, a kind of common-mode noise test fixture, including common mode test cell 1 and shielding box 2, the common mode
Test cell 1 includes common mode measurement circuit plate 11 and 12 and of golden finger socket being welded on the common mode measurement circuit plate 11
RF coaxial connects pedestal 13, and the back side of the common mode measurement circuit plate 11 is placed with test circuit 14；
The shielding box 2 is whole to be made using stainless steel material, is solved existing common-mode noise jig and is generally used electricity
Wood, glass fiber material, the production of the materials such as acryl, such box can not resist outside invading signal interference, interference signal can directly from
Signal is input to the problem of output end, test waveform easily deviate true value；Further, the shielding box 2 includes shielding pedestal
21, shielding box cover 22 and several radiofrequency signal coaxial connectors 23, the left and right side walls of the shielding pedestal 21, which extend internally, to be set
There is shielding mounting base 211, the common mode measurement circuit plate 11 is separately fixed at two shielding peaces by several fastening screws 3
It fills on seat 211, and is equipped with the through slot 2111 for accommodating the test circuit 14 between two shielding mounting bases 211；Using double
The shielding box 2 of layer, the shielding pedestal 21, shielding box cover 22 are combined with the shielding mounting base 211, and shield effectiveness is good
And strong antijamming capability, two described shield only reserve the accommodating through slot for testing circuit 14 between mounting bases 211
2111, will be space-minimized, reduce extraneous signal interference；
Several radiofrequency signal coaxial connectors 23 are separately fixed on the forward and backward side wall of the shielding pedestal 21, and
One end of the radiofrequency signal coaxial connector 23 connect pedestal 13 with the RF coaxial and is connected, specifically, the radio frequency letter
Number coaxial connector 23 is set as three, be respectively used to signal generator input a signal into, generator signal is separated one group to
Channel oscilloscope and signal output oscillograph or display, are not interfered, the shielding with ensuring to test signal by outer signals
The lid of box cover 22, which is closed, forms the closed shielding box 2 on the shielding pedestal 21.
Referring to Fig.1, the radiofrequency signal coaxial connector 23 includes RF coaxial coupling 231, RF coaxial connecting line
Cable 232 and RF coaxial nipple 233, the RF coaxial coupling 231 are fixed on the forward and backward side wall of the shielding pedestal 21
On, the RF coaxial nipple 233 connect the threaded connection of pedestal 13, the RF coaxial connection cables with the RF coaxial
232 both ends are connected with the RF coaxial coupling 231 and the RF coaxial nipple 233 respectively, the radiofrequency signal
Coaxial connector 23 uses the RF coaxial connection cables 232, and resistivity is good, and line effect is good, and signal decaying is weak, tests number
According to true.
Preferably, one end of the shielding mounting base 211 is equipped with wiring notch 2112, it is convenient for the RF coaxial connecting line
The wiring of cable 232 avoids the RF coaxial connection cables 232 from being squeezed or deform for a long time and wire rod is caused to damage, causes to connect
Line is ineffective, and deamplification is serious, test data distortion.
Further, the shielding box cover 22 is equipped with the mounting hole 221 to match with the golden finger socket 12, described
The lid of shielding box cover 22 closes on the shielding pedestal 21, and the golden finger socket 12 is exposed to described by the mounting hole 221
Shielding box 2, the utility model only allow 12 part of the golden finger socket of contact product exposed, and product is only inserted with the golden finger
Seat 12 contacts, to ensure to test signal stabilization.
Further, the shielding box cover 22 is fixed in the shielding mounting base 211 by several fastening screws 3.
Referring to Fig. 4, set that there are two the contact flat spring 121 being oppositely arranged, two face contacts of product in the golden finger socket 12
The contact flat spring 121,121 elastic force of contact flat spring is abundant, effect is good, wear-resisting practical and plug restores fast.
Preferably, the common mode measurement circuit plate 11 is coated with copper film other than the test circuit 14.The common mode is surveyed
Examination wiring board 11 covers copper above, covers copper other than the test circuit 14 below, through fastening with the shielding mounting base 211
Afterwards, it can be ensured that adequately grounded.
Further, the bottom wall of the shielding pedestal 21, which extends to be equipped with to two sides, is connected and fixed plate 212, described to be connected and fixed
Plate 212 be equipped with fixation hole 2121, be connected and fixed plate 212 and the fixation hole 2121 by described, by the use of the new type with set
Standby metal phase is fixed together, it is ensured that the shielding box 2 is grounded well, anti-external interference.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, architectural form cans be flexible and changeable, and can be produced with subseries
Product.Several simple deduction or replace are only made, it is true by the claims submitted all to shall be regarded as belonging to the utility model
Fixed scope of patent protection.
Claims (8)
1. a kind of common-mode noise test fixture, including common mode test cell and shielding box, it is characterised in that: the common mode test is single
Member includes that common mode measurement circuit plate and the golden finger socket being welded on the common mode measurement circuit plate connect bottom with RF coaxial
Seat, the back side of the common mode measurement circuit plate is placed with test circuit；If the shielding box include shielding pedestal, shielding box cover and
Dry radiofrequency signal coaxial connector, the left and right side walls of the shielding pedestal, which extend internally, is equipped with shielding mounting base, the common mode
Measurement circuit plate is separately fixed in two shielding mounting bases by several fastening screws, and two shielding mounting bases
Between be equipped with accommodate it is described test circuit through slot；Several radiofrequency signal coaxial connectors are separately fixed at the shielding base
On the forward and backward side wall of seat, and one end of the radiofrequency signal coaxial connector connect pedestal with the RF coaxial and is connected, described
The conjunction of shielding box cover lid forms the closed shielding box on the shielding pedestal.
2. common-mode noise test fixture as described in claim 1, it is characterised in that: the radiofrequency signal coaxial connector includes
RF coaxial coupling, RF coaxial connection cables and RF coaxial nipple, the RF coaxial coupling are fixed on described
On the forward and backward side wall for shielding pedestal, the RF coaxial nipple connect whorl of base connection with the RF coaxial, described to penetrate
Frequently the both ends of coaxially connected cable are connected with the RF coaxial coupling and the RF coaxial nipple respectively.
3. common-mode noise test fixture as claimed in claim 2, it is characterised in that: one end of the shielding mounting base is equipped with cloth
Line notch.
4. common-mode noise test fixture as described in claim 1, it is characterised in that: the shielding box cover is equipped with and the gold
The mounting hole that finger receptacle matches, the shielding box cover lid close on the shielding pedestal, and the golden finger socket passes through institute
It states mounting hole and exposes to the shielding box.
5. common-mode noise test fixture as described in claim 1, it is characterised in that: the shielding box cover passes through several fastening spiral shells
Nail is fixed in the shielding mounting base.
6. common-mode noise test fixture as described in claim 1, it is characterised in that: phase there are two being set in the golden finger socket
To the contact flat spring of setting.
7. common-mode noise test fixture as described in claim 1, it is characterised in that: the common mode measurement circuit plate is in addition to described
Copper film is coated with outside test circuit.
8. common-mode noise test fixture as described in claim 1, it is characterised in that: the bottom wall of the shielding pedestal prolongs to two sides
It stretches to be equipped with and is connected and fixed plate, the plate that is connected and fixed is equipped with fixation hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821526441.5U CN208847795U (en) | 2018-09-18 | 2018-09-18 | A kind of common-mode noise test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821526441.5U CN208847795U (en) | 2018-09-18 | 2018-09-18 | A kind of common-mode noise test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208847795U true CN208847795U (en) | 2019-05-10 |
Family
ID=66373265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821526441.5U Active CN208847795U (en) | 2018-09-18 | 2018-09-18 | A kind of common-mode noise test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208847795U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115810954A (en) * | 2023-02-08 | 2023-03-17 | 苏州联讯仪器股份有限公司 | Low-leakage-current cable device |
-
2018
- 2018-09-18 CN CN201821526441.5U patent/CN208847795U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115810954A (en) * | 2023-02-08 | 2023-03-17 | 苏州联讯仪器股份有限公司 | Low-leakage-current cable device |
| CN115810954B (en) * | 2023-02-08 | 2023-05-23 | 苏州联讯仪器股份有限公司 | Low leakage current cable device |
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