CN208621645U - The test fixture of communication module - Google Patents
The test fixture of communication module Download PDFInfo
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- CN208621645U CN208621645U CN201821048299.8U CN201821048299U CN208621645U CN 208621645 U CN208621645 U CN 208621645U CN 201821048299 U CN201821048299 U CN 201821048299U CN 208621645 U CN208621645 U CN 208621645U
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Abstract
The utility model discloses a kind of test fixture of communication module, communication module includes power pins, grounding pin and functional pin, and test fixture includes voltage protection circuit and test circuit；Voltage protection circuit includes power input, power output end and protection end；Test circuit includes power pad, testing weld pad and protection pad；Power output end is electrically connected with power pad, protection end and protection pad electrical connection；Voltage protection circuit be used for when power input input voltage and power pins, grounding pin and functional pin respectively electrical connection corresponding with power pad, protection pad and testing weld pad when, by power output end to power pins output voltage.The test fixture of the utility model is when the electrical connection corresponding with the grounding pin of communication module of the protection pad of power input input voltage and voltage protection circuit; the power output end of voltage protection circuit just understands output voltage; otherwise not output voltage, to play a protective role to communication module.
Description
Technical field
The utility model relates to a kind of test fixtures, and in particular to a kind of test fixture of communication module.
Background technique
Test PCB (printed circuit board) plate is fixedly installed in the production test of wireless communication module, in test fixture,
It is provided with test chip and test interface on test pcb board, limiting device, such as card slot are placed on test interface, for placing
Wireless communication module before test, is placed in card slot by communication module so that each pin of the module interface of wireless communication module with
The corresponding electrical connection of each pin of test interface, when test, the power pad tested on pcb board can be to the electricity of wireless communication module
The power supply of source capsule foot, but when placing test module in card slot, if test module is not placed by defined direction and is caused
The pin tested on pcb board misplaces with the pin of test module, and the power pad that will lead on pcb board is attached directly to module interface
Signal pin perhaps pin influences production efficiency, reduces product to cause that module pin is damaged or power supply is burned
Quality.
In subsequent improvement project, power protecting circuit is increased, when detecting that communication module is put back and causes to input
It when power supply shorted to earth, can automatically cut off the power, the damage of communication module can be reduced to a certain extent.But works as and lead to
News module is put back without causing input power shorted to earth, for example, power pin be connected to the biggish signal pin of resistance value or
Other power pins or hanging pin, power protecting circuit can not just play a protective role.
For existing test fixture thimble using the metal thimble of needle-like, thimble upper end is connected to communication module pin
Pad, thimble lower end are connected to the pin pad on test PCB, realize communication module and test the electrical connection of pcb board, due to this
Metal thimble upper and lower ends are all more tapering, be easy to cause radio-frequency emission power deviation larger, and unstable, while module is welded
Disk also will appear the trace pricked by thimble, and test fixture passes through prolonged pressing operation, metal thimble lower end and test PCB
Plate will appear abrasion, be further exacerbated by transmission power deviation.
Utility model content
The technical problems to be solved in the utility model is to overcome the test fixture of communication module in the prior art surveying
It will cause module pin damage or the defect that power supply is burned during examination, a kind of test fixture of communication module be provided.
The utility model is to solve above-mentioned technical problem by following technical proposals:
A kind of test fixture of communication module, communication module include power pins, grounding pin and functional pin, the survey
Examination fixture includes voltage protection circuit and test circuit；
The voltage protection circuit includes power input, power output end and protection end；
The test circuit includes power pad, testing weld pad and protection pad；
The power output end is electrically connected with the power pad, the protection end and protection pad electrical connection；
The voltage protection circuit is used to work as the power input input voltage and the power pins, grounding pin
With functional pin respectively with the power pad, protection pad and testing weld pad corresponding electrical connection when, exported by the power supply
It holds to the power pins output voltage.
Preferably, the grounding pin includes the first grounding pin, the protection end includes the first protection end, the voltage
Protecting circuit further includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the one or two pole
Pipe, first switch, second switch and third switch, the first switch include the first control terminal, and the second switch includes the
Two control terminals, the third switch includes third control terminal；
Anode of the one end of first protection end respectively with one end of the first resistor, the first diode is electrically connected
It connecing, the other end of the first resistor is electrically connected with one end of one end of the second resistance, 3rd resistor respectively, and described second
The other end of resistance is electrically connected with the power input, the other end ground connection of the 3rd resistor, and the one of the 6th resistance
End is electrically connected with the power input, and the other end of the 6th resistance is electrically connected with the third control terminal, and described first
The cathode of diode is electrically connected with one end of the 4th resistance, first control terminal respectively, the 4th resistance it is another
End ground connection, one end of the first switch are electrically connected with one end of the 5th resistance, the second control terminal respectively, the 5th electricity
One end that the other end of resistance is switched with the power input and the third respectively be electrically connected, one end of the second switch and
The third control terminal electrical connection, the other end ground connection of the second switch, the other end and the power supply of the third switch
Output end electrical connection.
Preferably, the grounding pin further includes the second grounding pin, the voltage protection circuit further includes the two or two pole
Pipe, the 7th resistance, the protection end further includes the second protection end, one end of second protection end respectively with the 7th resistance
One end and second diode anode electrical connection, the cathode of second diode is electrically connected with first control terminal
It connects, the other end of the 7th resistance is electrically connected with the other end of the first resistor.
Preferably, the grounding pin further includes third grounding pin, the voltage protection circuit further includes the three or two pole
Pipe and the 8th resistance, the protection end further includes third protection end, one end of the third protection end respectively with the 8th resistance
The electrical connection of the anode of one end and the third diode, the cathode of the third diode are electrically connected with first control terminal,
The other end of 8th resistance is electrically connected with the other end of the first resistor.
Preferably, the first switch be NMOS tube or NPN triode, and/or, the second switch be PMOS tube or
PNP triode, and/or, the third switch is NMOS tube or NPN triode；
And/or the voltage protection circuit and the test circuit are electrically connected by connector.
Preferably, the 3rd resistor is adjustable resistance.
Preferably, the power pad, the testing weld pad and the protection pad arrange to form test with permanent order
Interface；
The power pins, the grounding pin and the functional pin arrange to form module interface with permanent order；
The test interface is electrically connected by elastic metallic thimble with the module interface.
Preferably, the elastic metallic thimble is S type metal thimble, one end of the S type metal thimble and the test
Interface contact connection, the other end and the module interface of the S type metal thimble connect.
Preferably, the test fixture further includes a card slot, the card slot is for loading the communication module；
The card slot be equipped with through-hole, the elastic metallic thimble pass through the through-hole be electrically connected the test interface and
Module interface.
Preferably, the test fixture further includes power module and pressing device；
The pressing device is electrically connected with the power module；
The pressing device is located above the card slot；
When the input voltage is inputted the power input by the power module, the pressing device pressure sets described
Communication module.
The positive effect of the utility model is: the test fixture of the communication module of the utility model is by testing
Voltage protection circuit is electrically connected on circuit, when the protection pad of power input input voltage and voltage protection circuit and communication
When the corresponding electrical connection of the grounding pin of module, the power output end of voltage protection circuit just understands output voltage to communication module, with
It powers, otherwise will not power to communication module, to play a protective role to communication module to communication module.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the test fixture of the communication module of the utility model.
Fig. 2 is the circuit diagram of the voltage protection circuit of the test fixture of the communication module of the utility model.
Fig. 3 is the circuit diagram of the connector of the test fixture of the communication module of the utility model.
Specific embodiment
The utility model is further illustrated below by the mode of embodiment, but is not therefore limited in the utility model
Among the embodiment described range.
The present embodiment provides a kind of test fixture of communication module, communication module includes module interface, and module interface includes
Power pins, grounding pin and functional pin, power pins, grounding pin and functional pin arrange to form module with permanent order
Interface.Communication module in the present embodiment is wireless communication module.
As Figure 1-Figure 2, the test fixture of communication module includes switch module 1, pressing device 2, card slot 3, voltage guarantor
Protection circuit 4, test circuit 5, switch module 1 includes power module, and pressing device 2 is electrically connected with power module.
Voltage protection circuit 4 includes power input V1, power output end V2 and protection end, and protection end includes the first protection
Hold A, the second protection end B and third protection end C.Testing circuit 5 includes test interface, and test interface includes power pad, test
Pad and protection pad, power pad, testing weld pad and protection pad arrange to form test interface with permanent order, power supply output
End V2 is electrically connected with power pad, protection end and protection pad electrical connection.
Power pins, grounding pin and functional pin are corresponding with power pad, protection pad and testing weld pad respectively.
Voltage protection circuit 4 is used for when power input V1 input voltage and pad is protected to be electrically connected with grounding pin
When, power output end V2 is to power pins output voltage.
When power input V1 input voltage, and when test interface electrical connection corresponding with module interface, protection weldering
Disk is electrically connected with grounding pin, power output end V2 output voltage to power pins, to supply electricity to communication module 7.
Testing circuit 5 includes test interface, and test interface includes power pad, testing weld pad and protection pad, power supply weldering
Disk, testing weld pad and protection pad arrange to form test interface with permanent order.Test circuit 5 is set to the test of communication module
On the clamping fixture seat 6 of fixture, card slot 3 is set to the top of test interface, and for loading communication module 7, pressing device 2 is located at card slot
3 tops.
When being tested, communication module 7 is set to card slot 3 according to preset direction.When power module input voltage extremely
When power input, starts switch module 1 and the pressure of pressing device 2 is made to set communication module, module interface is made to be electrically connected with test interface
It connects, if the electrical connection corresponding with power pad, protection pad and testing weld pad respectively of power pins, grounding pin and functional pin,
Illustrate the placement in the right direction of communication module 7 as requested, voltage protection circuit 4 passes through power output end output voltage extremely at this time
The test interface of circuit 5 is tested, to power to the module interface of communication module 7, and then is powered to communication module 7, after can entering
The process that continuous test circuit 5 tests communication module 7.If the non-correct placement of communication module 7 namely power pins, grounding lead
Foot and functional pin with power pad, protection pad and testing weld pad be not corresponding is electrically connected, the power supply of voltage protection circuit 4 at this time
Output end V2 will not output voltage, voltage protection circuit plays protective effect to communication module at this time.
In the present embodiment, voltage protection circuit 4 and test circuit 5 can be electrically connected by connector J1, the electricity of connector J1
For line structure as shown in figure 3, connector J1 is provided with multiple pins, multiple pins are electric with each pin of voltage protection circuit 4 respectively
Connection.Connector J1 between voltage protection circuit 4 and test circuit 5 is removably, to be convenient for changing voltage protection circuit
4, can satisfy different model, different output level communication module test request.When voltage protection circuit 4 damages
When, directly one voltage protection circuit 4 of the lower replacement of disassembly can allow the test fixture of communication module to restore to work normally.
In the present embodiment, the test fixture of communication module is able to detect that by voltage protection circuit 4 due to communication module 7
Power output end V2 shorted to earth caused by mistake is placed, power output end V2 is connected to the hanging pin of communication module 7, power supply
Output end V2 is connected to the biggish functional pin of resistance value and power output end V2 is connected to the out-put supply pad of communication module 7
Etc. a variety of abnormal conditions, to realize the voltage output protection of abnormal conditions.
Specifically, grounding pin includes the first grounding pin, the second grounding pin and third grounding pin, as shown in Fig. 2,
Voltage protection circuit 4 is including further including first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance
R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, first diode D1, the second diode D2, third diode D3,
One switch Q1, second switch Q2 and third switch Q3, first switch Q1 include the first control terminal, and second switch Q2 includes the second control
End processed, third switch Q3 include third control terminal.
One end of first protection end A is electrically connected with the anode of one end of first resistor R1, first diode D1 respectively, and first
The other end of resistance R1 respectively with one end of second resistance R2, one end of 3rd resistor R3, one end of the 4th resistance R4, the 5th
One end of resistance R5 is electrically connected, and the other end of second resistance R2 is electrically connected with one end of power input V1, the 6th resistance R6, the
The other end of three resistance R3 is grounded, and the cathode of first diode D1 is electrically connected with one end of the 4th resistance R4, the first control terminal respectively
Connect, the other end of the 4th resistance R4 ground connection, one end of first switch Q1 respectively with one end of the 5th resistance R5, the second control terminal
Electrical connection, the other end of the 5th resistance R5 are electrically connected with one end of power input V1 and third switch Q3 respectively, second switch
One end of Q2 is electrically connected with the other end of the 6th resistance R6, third control terminal respectively, the other end ground connection of second switch Q2, third
The other end of switch Q3 is electrically connected with power output end V2.
One end of second protection end B is electrically connected with the anode of one end of the 7th resistance R7 and the second diode D2 respectively, the
The cathode of two diode D2 is electrically connected with the first control terminal, and the other end of the other end and first resistor R1 of the 7th resistance R7 is electrically connected
It connects.
One end of third protection end C is electrically connected with the anode of the 8th resistance R8 and third diode D3 respectively, the three or two pole
The cathode of pipe D3 is electrically connected with the first control terminal, and the other end of the 8th resistance R8 is electrically connected with the other end of first resistor R1.
When the first control terminal is high level, first switch Q1 conducting, when the first control terminal is low level, first switch
Q1 is disconnected；When first switch Q1 is disconnected, the second control terminal is high level, and when first switch Q1 conducting, the second control terminal is
Low level；When the second control terminal is high level, second switch Q2 conducting, when the second control terminal is low level, second switch
Q2 is disconnected；When second switch conducting, third control terminal is low level, and when second switch disconnects, third control terminal is high electricity
It is flat；When third control terminal is low level, third switch Q3 conducting, when third control terminal is high level, third switch Q3 is disconnected
It opens.
When power pins are electrically connected with power pad, and when the other end and the first grounding pin of the first protection end A
It is electrically connected, the other end of the second protection end B is electrically connected with the second grounding pin, the other end of third protection end C and third ground connection
When pin is electrically connected, first diode D1 cut-off, the second diode D2 ends, third diode D3 cut-off, and the first control terminal is
Low level；When the first control terminal is low level, first switch Q1 is disconnected, and the second control terminal is high level, and second switch Q2 is led
Logical, third control terminal is low level, third switch Q3 conducting, power input V1 and power output end V2 conducting, voltage output
Hold output voltage.
When the other end of the first protection end A is electrically connected or the other end of the second protection end B connects with non-with ungrounded pin
When the other end of the electrical connection of ground pin or third protection end C are electrically connected with ungrounded pin, the first control terminal is high level, the
One switch Q1 conducting, the second control terminal are low level, and second switch Q2 is disconnected, and third control terminal is high level, third switch Q3
It disconnects, power input V1 and power output end V2 are disconnected, voltage output end Non voltage output.
When position places correct to communication module 7 as required in test fixture, first to third protection end C can be contacted
To three grounding pins of communication module 7, power output end V2 has voltage output；When communication module 7 is not placed as required, the
One to third protection end C, which at least has one, is not connected to grounding pin in high level, and power output end V2 is without output
Voltage.
3rd resistor is adjustable resistance, can be manually adjusted, by adjusting the resistance value of 3rd resistor with from power input
Power supply on V1 divides pull-up power supply required for obtaining the first protection end A- third protection end C, the power domain of the pull-up power supply
For the input and output power domain (the input/output interface high level supply voltage of communication module) of communication module.
Voltage protection circuit 4 can satisfy the test protection demand of most wireless communication modules, including common
1.8V (volt), the level such as 2.8V, 3.0V and 3.3V, application are relatively broad.The voltage protection circuit 4 can also be applied in nothing simultaneously
In USB (universal serial bus) circuit of line communication module, in testing if communicated using USB, when wireless telecommunications mould
Block puts the pin connecting staggered for instead resulting in interface, and the power pin that also will appear USB is connected to other signal pins or logical
Interrogate the pad of the grounding pin in the module interface of module, in the case, power output end V2 Non voltage output, thus to nothing
Line communication module plays a protective role.
First switch Q1 manages for NMOS (N-type Metal-oxide-semicondutor) or a kind of NPN (triode-type) triode,
And/or second switch Q2 manages for PMOS (p-type Metal-oxide-semicondutor) or a kind of PNP (triode type) triode,
And/or third switch Q3 is NMOS tube or NPN triode.
It in the present embodiment, is connected between test interface and module interface by elastic metallic thimble, card slot 3 is equipped with logical
Hole, elastic metallic thimble passes through through-hole, so that the both ends of elastic metallic thimble are separately connected test interface and module interface.
Specifically, elastic metallic thimble is S type metal thimble, the upper end of S type metal thimble and test interface are connected,
The upper end and module interface that S type goldentop needle belongs to connect.Card slot 3 is the mold made according to the actual size of communication module,
Aperture is carried out according to the center of the pad of the module interface of communication module, one end of the metal thimble in push pin device can be with
Across position of opening.Metal thimble uses S type metal thimble, bigger than common needle-like thimble contact area, when pressing device 2
When compressing communication module, S type metal thimble can be compressed, which has the elastic force for restoring original state, so that S
Type metal thimble can be closer electrical connection communication module and test circuit 5, while in testing will not be to communication module
Module interface causes impression and scuffing.
The hollow plate that circuit 5 can also include wireless communication module is tested, hollow plate indicates there is wireless telecommunications mould on test circuit 5
Copper position is leaked in the welding of block, but is not welded, and can be electrically connected, surveyed with wireless communication module to be measured realization by metal thimble
It tries to draw some test interfaces on the circuit board of circuit 5, including USB, serial ports, SIM (subscriber identification card) card and antenna
Equal interfaces.Specifically, test circuit 5 can realize corresponding test function by pcb board.
Although the foregoing describe specific embodiment of the present utility model, it will be appreciated by those of skill in the art that
This is merely illustrative of, and the protection scope of the utility model is defined by the appended claims.Those skilled in the art
Under the premise of without departing substantially from the principles of the present invention and essence, many changes and modifications may be made,
But these change and modification each fall within the protection scope of the utility model.
Claims (10)
1. a kind of test fixture of communication module, communication module include power pins, grounding pin and functional pin, feature exists
In the test fixture includes voltage protection circuit and test circuit；
The voltage protection circuit includes power input, power output end and protection end；
The test circuit includes power pad, testing weld pad and protection pad；
The power output end is electrically connected with the power pad, the protection end and protection pad electrical connection；
The voltage protection circuit is used to work as the power input input voltage and the power pins, grounding pin and function
Can pin respectively with the power pad, protection pad and testing weld pad corresponding electrical connection when, by the power output end to
The power pins output voltage.
2. the test fixture of communication module as described in claim 1, which is characterized in that the grounding pin includes the first ground connection
Pin, the protection end include the first protection end, and the voltage protection circuit further includes first resistor, second resistance, third electricity
Resistance, the 4th resistance, the 5th resistance, the 6th resistance, first diode, first switch, second switch and third switch, described first
Switch includes the first control terminal, and the second switch includes the second control terminal, and the third switch includes third control terminal；
One end of first protection end is electrically connected with the anode of one end of the first resistor, the first diode respectively,
The other end of the first resistor is electrically connected with one end of one end of the second resistance, 3rd resistor respectively, second electricity
The other end of resistance is electrically connected with the power input, the other end ground connection of the 3rd resistor, one end of the 6th resistance
It being electrically connected with the power input, the other end of the 6th resistance is electrically connected with the third control terminal, and the described 1st
The cathode of pole pipe is electrically connected with one end of the 4th resistance, first control terminal respectively, the other end of the 4th resistance
Ground connection, one end of the first switch are electrically connected with one end of the 5th resistance, the second control terminal respectively, the 5th resistance
One end for being switched respectively with the power input and the third of the other end be electrically connected, one end of the second switch and institute
The electrical connection of third control terminal is stated, the other end of the second switch is grounded, and the other end and the power supply of the third switch are defeated
Outlet electrical connection.
3. the test fixture of communication module as claimed in claim 2, which is characterized in that the grounding pin further includes second connecing
Ground pin, the voltage protection circuit further include the second diode, the 7th resistance, and the protection end further includes the second protection end,
One end of second protection end is electrically connected with the anode of one end of the 7th resistance and second diode respectively, described
The cathode of second diode is electrically connected with first control terminal, and the other end of the 7th resistance is another with the first resistor
One end electrical connection.
4. the test fixture of communication module as claimed in claim 3, which is characterized in that the grounding pin further includes that third connects
Ground pin, the voltage protection circuit further include third diode and the 8th resistance, and the protection end further includes third protection end,
One end of the third protection end is electrically connected with the anode of one end of the 8th resistance and the third diode respectively, the third
The cathode of diode is electrically connected with first control terminal, the other end of the 8th resistance and the other end of the first resistor
Electrical connection.
5. the test fixture of communication module as claimed in claim 2, which is characterized in that the first switch be NMOS tube or
NPN triode, and/or, the second switch is PMOS tube or PNP triode, and/or, third switch be NMOS tube or
NPN triode；
And/or the voltage protection circuit and the test circuit are electrically connected by connector.
6. the test fixture of communication module as claimed in claim 2, which is characterized in that the 3rd resistor is adjustable resistance.
7. the test fixture of communication module as described in claim 1, which is characterized in that the power pad, test weldering
Disk and the protection pad arrange to form test interface with permanent order；
The power pins, the grounding pin and the functional pin arrange to form module interface with permanent order；
The test interface is electrically connected by elastic metallic thimble with the module interface.
8. the test fixture of communication module as claimed in claim 7, which is characterized in that the elastic metallic thimble is S type gold
Belong to thimble, one end of the S type metal thimble and the test interface connect, the other end of the S type metal thimble with
The module interface connects.
9. the test fixture of communication module as claimed in claim 7, which is characterized in that the test fixture further includes a card
Slot, the card slot is for loading the communication module；
The card slot is equipped with through-hole, and the elastic metallic thimble passes through the through-hole to be electrically connected the test interface and module
Interface.
10. the test fixture of communication module as claimed in claim 9, which is characterized in that the test fixture further includes power supply
Module and pressing device；
The pressing device is electrically connected with the power module；
The pressing device is located above the card slot；
When the input voltage is inputted the power input by the power module, the pressing device pressure sets the communication
Module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821048299.8U CN208621645U (en) | 2018-06-29 | 2018-06-29 | The test fixture of communication module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821048299.8U CN208621645U (en) | 2018-06-29 | 2018-06-29 | The test fixture of communication module |
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| Publication Number | Publication Date |
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| CN208621645U true CN208621645U (en) | 2019-03-19 |
Family
ID=65704643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201821048299.8U Active CN208621645U (en) | 2018-06-29 | 2018-06-29 | The test fixture of communication module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112034213A (en) * | 2020-08-21 | 2020-12-04 | 日立楼宇技术（广州）有限公司 | Test tool and test system |
| CN112422204A (en) * | 2020-10-30 | 2021-02-26 | 重庆芯讯通无线科技有限公司 | Testing device of communication module |
| CN113346309A (en) * | 2021-06-07 | 2021-09-03 | 歌尔股份有限公司 | Connecting tool and testing system |
| CN113507400A (en) * | 2021-08-06 | 2021-10-15 | 深圳市广和通无线股份有限公司 | Testing device and method for communication module |
-
2018
- 2018-06-29 CN CN201821048299.8U patent/CN208621645U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112034213A (en) * | 2020-08-21 | 2020-12-04 | 日立楼宇技术（广州）有限公司 | Test tool and test system |
| CN112422204A (en) * | 2020-10-30 | 2021-02-26 | 重庆芯讯通无线科技有限公司 | Testing device of communication module |
| CN113346309A (en) * | 2021-06-07 | 2021-09-03 | 歌尔股份有限公司 | Connecting tool and testing system |
| CN113346309B (en) * | 2021-06-07 | 2022-11-11 | 歌尔股份有限公司 | Connecting tool and testing system |
| CN113507400A (en) * | 2021-08-06 | 2021-10-15 | 深圳市广和通无线股份有限公司 | Testing device and method for communication module |
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