CN206523531U - A kind of testing needle and the test device for printed circuit board (PCB) - Google Patents
A kind of testing needle and the test device for printed circuit board (PCB) Download PDFInfo
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- CN206523531U CN206523531U CN201720207583.4U CN201720207583U CN206523531U CN 206523531 U CN206523531 U CN 206523531U CN 201720207583 U CN201720207583 U CN 201720207583U CN 206523531 U CN206523531 U CN 206523531U
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- test
- testing needle
- outer tube
- binding post
- resistance unit
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Abstract
The utility model embodiment discloses a kind of testing needle and the test device for printed circuit board (PCB).Wherein, the testing needle includes test head, binding post and outer tube, and the lower end of the test head is inserted from the top of the outer tube, and the upper end of the binding post is inserted from the bottom of the outer tube；Also include：Resistance unit, the resistance unit is arranged in the outer tube, and the resistance unit abuts the lower end of the test head and the upper end of the binding post respectively.The utility model embodiment is by the way that resistance unit is introduced into testing needle, to increase the overall resistance of testing needle, solve testing needle and test point Contact, larger discharge current is had to produce, circuit-under-test can be damaged, and the interference signal on the lead of testing needle wiring styletable can be incorporated into test point by the access of testing needle, make the problem of quality of the signal of test point is affected, so as to improve the security and accuracy of test.
Description
Technical field
The utility model is related to electronic test probe and PCB testing needle technologies, more particularly to a kind of testing needle and for printing
The test device of printed circuit board.
Background technology
Board is a kind of printed circuit board (PCB), and abbreviation PCB (Printed Circuit Board, printed circuit board (PCB)) plate makes
When carry lock pin, in the slot of main circuit board (mainboard) that may be inserted into computer, for controlling the operation of hardware, such as show
The equipment such as device, capture card, are installed after driver, you can realize corresponding hardware capability.
When the board of batch production is tested, it is necessary to which testing needle to be placed into the test point of board, then to surveying
The signal of pilot is tested.However, testing needle and test point Contact, have larger discharge current and produce, can damage
Circuit-under-test.
Utility model content
The utility model embodiment provides a kind of testing needle and the test device for printed circuit board (PCB), to improve test
Security and accuracy.
In a first aspect, the utility model embodiment provides a kind of testing needle, including test head, binding post and overcoat
Pipe, the lower end of the test head is inserted from the top of the outer tube, and the upper end of the binding post is from the bottom of the outer tube
End insertion；Also include：Resistance unit, the resistance unit is arranged in the outer tube, and the resistance unit abuts the test respectively
The lower end on head and the upper end of the binding post.
Further, the inner surface of the outer tube applies insulating layer coating.
Further, the outer tube is insulation tube.
Further, the outer tube is threadedly coupled with the test head.
Further, the outer tube is threadedly coupled with the binding post.
Further, the resistance unit is resistance.
Further, the test head includes contact, spring and inner sleeve, the inner sleeve upper end open, the bullet
Spring is arranged in the inner sleeve, and the lower end of the contact is arranged in the inner sleeve, the bottom surface of the contact and the bullet
The top of spring is abutted.
Further, the inner sleeve lower end closed, the bottom of the spring and the bottom interior surface of the inner sleeve are supported
Connect.
Second aspect, the utility model embodiment additionally provides a kind of test device for printed circuit board (PCB), the test
Device includes：At least one test block, fixed plate and signal processing apparatus, at least one described test block are set as this practicality is new
The testing needle that type any embodiment is provided, the upper end of the test head of the testing needle is used to connect with the test point of printed circuit board (PCB)
Touch, the bottom of the binding post of the testing needle be arranged in the fixed plate and with the input phase of the signal processing apparatus
Even.
Further, in addition to display device, the output of the input of the display device and the signal processing apparatus
End is connected.
The utility model embodiment is by the way that resistance unit is introduced into testing needle, and resistance unit is arranged in outer tube, resistance unit
Respectively abut test head lower end and binding post upper end, to increase the overall resistance of testing needle, solve testing needle with
Test point Contact, has larger discharge current and produces, and can damage circuit-under-test, and the access of testing needle will can be tested
Interference signal on the lead of pin wiring styletable is incorporated into test point, makes the problem of quality of the signal of test point is affected,
So as to improve the security and accuracy of test.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the testing needle provided in the utility model embodiment one；
Fig. 2 is a kind of structural representation of the test device for printed circuit board (PCB) provided in the utility model embodiment two
Figure.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model, rather than limits of the present utility model.Further need exist for
It is bright, for the ease of description, the part related to the utility model rather than entire infrastructure are illustrate only in accompanying drawing.
Embodiment one
Fig. 1 is a kind of structural representation for testing needle that the utility model embodiment one is provided, as shown in figure 1, the test
Pin includes test head 110, binding post 120 and outer tube 130, and the lower end of the test head 110 is from the outer tube 130
Top is inserted, and the upper end of the binding post 120 is inserted from the bottom of the outer tube 130；Also include：Resistance unit 140, the electricity
Resistor 140 is arranged in the outer tube, and the resistance unit 140 abuts the lower end of the test head 110 and described connect respectively
The upper end of terminal 120.
Wherein, the testing needle includes test head 110, binding post 120 and outer tube 130, the test head 110 and wiring
Post 120 has conductive capability, and the lower end of test head 110 is inserted from the top of outer tube 130, the upper end of the binding post 120
Inserted from the bottom of the outer tube 130.Resistance unit 140 is the part with preset resistive value, to increase the overall electricity of testing needle
Resistance, the resistance unit 140 is arranged in outer tube 130, and resistance unit 140 abuts lower end and the binding post of test head 110 respectively
120 upper end.The preset resistive value of resistance unit 140 is set according to the resistance value of the output resistance at the test point of circuit-under-test
Put.The resistance value of output resistance at the test point of circuit-under-test is bigger, then the preset resistive value of resistance unit 140 is bigger.The wiring
Post 120 can be conducting metal, such as can be copper, aluminium.The inner surface of the outer tube 130 is insulation, prevents from being arranged on
Resistance unit 140 in outer tube 130 is short-circuited.At least one can be selected in test head 110, binding post 120 and outer tube 130
With the material that resistivity is larger, to increase the overall resistance of testing needle.
Wherein, the signal-under-test at the test point of circuit-under-test is needed by testing needle and lead arriving signal detection dress
Put (input that can be signal processing apparatus), the resistance value of the input resistance of signal supervisory instrument is much larger than circuit-under-test
The resistance value of output resistance at test point and the overall resistance of testing needle, because the signal that signal supervisory instrument is detected is
The product of the resistance value of the input resistance of signal-under-test and test device at the test point of circuit-under-test, it is then divided by tested
The input resistance of the resistance value of output resistance at the test point of circuit, the overall resistance of testing needle and signal supervisory instrument
Resistance value sum, therefore testing needle adds resistance unit, the accuracy influence very little of the signal detected on signal supervisory instrument, signal
The signal that detection means is detected is still close to the signal-under-test at the test point of circuit-under-test.When introducing interference signal on lead
When, interference signal can be reached at the test point of circuit-under-test by testing needle, by the quilt at the test point for the circuit-under-test that is added to
In test signal, then the interference signal on signal-under-test at the test point of circuit-under-test that is added to is dry for what is introduced on lead
The resistance value for the output resistance that signal is multiplied by the test point of circuit-under-test is disturbed, it is defeated then divided by the test point of circuit-under-test
Go out the resistance value of resistance and the overall resistance sum of testing needle, therefore the increase of the overall resistance of testing needle, it can weaken and draw
Influence of the interference signal introduced on line to the signal-under-test at the test point of circuit-under-test.Testing needle adds resistance unit, can
So that the electric current flowed out at the test point of circuit-under-test reduces, testing needle and test point Contact are prevented, is had larger
Discharge current is produced, and can damage circuit-under-test.Therefore the security and accuracy of test can be improved.
It is preferred that, the inner surface of the outer tube 130 applies insulating layer coating.
Wherein, the inner surface of outer tube 130 can apply insulating layer coating, prevent the resistance unit 140 being arranged in outer tube 130
It is short-circuited, so as to increase the overall resistance of testing needle.The insulating barrier can be insulated paint, insulating cement, insulating paper, non-conductive fibre
Product, plastics and rubber etc..
It is preferred that, the outer tube 130 is insulation tube.
Wherein, outer tube 130 can be insulation tube, prevent the resistance unit 140 being arranged in outer tube 130 to be short-circuited, from
And increase the overall resistance of testing needle.The insulation tube can be made of the materials such as plastics or rubber.
It is preferred that, the outer tube 130 is threadedly coupled with the test head 110.
Wherein, outer tube 130 is threadedly coupled with test head 110, can make fixation, and conveniently by test head from
Dismantled on outer tube, to change part.
It is preferred that, the outer tube 130 is threadedly coupled with the binding post 120.
Wherein, outer tube 130 is threadedly coupled with binding post 120, can make fixation, and conveniently by test head 110
Dismantled from outer tube 130, to change test head 110.
It is preferred that, the resistance unit 140 is resistance.
Wherein, resistance unit 140 can be resistance, and the resistance can be Chip-R or chromatic circle resistance etc..
It is preferred that, as shown in figure 1, the test head 110 includes contact 111, spring 113 and inner sleeve 112, it is described interior
The upper end open of sleeve pipe 112, the spring 113 is arranged in the inner sleeve 112, and the lower end of the contact 111 is arranged on described
In inner sleeve 112, the bottom surface of the contact 111 is abutted with the top of the spring 113.
Wherein, test head 110 includes contact 111, spring 113 and inner sleeve 112, and the contact 111 and inner sleeve 112 have
There is conductive capability, the flexible of the spring can promote the upward downward movement of contact 111, so that the length of testing needle is adjusted,
The test point good contact of contact 111 and tested circuit can be made.The shape of the contact 111 can be prong, bloom pin and
Tylostyle etc..
It is preferred that, the lower end closed of inner sleeve 130, in the bottom of the bottom of the spring 113 and the inner sleeve 112
Surface is abutted.
Wherein, the lower end closed of inner sleeve 112, the bottom of spring 113 is abutted with the bottom interior surface of inner sleeve 112, inner sleeve
The section radius of the upper end of pipe 112 are more than the section radius of the lower end of contact 111 so that be deteriorated in the elastic performance of spring 113
When, the entirety of test head 110 including contact 111, spring 113 and inner sleeve 112 is changed.
The technical scheme of the present embodiment, by the way that resistance unit 140 is introduced into testing needle, resistance unit 114 is arranged on outer tube
In 130, resistance unit 140 abuts the lower end of test head 110 and the upper end of binding post 120 respectively, to increase the entirety of testing needle
Resistance value, solves testing needle and test point Contact, has larger discharge current and produces, can damage circuit-under-test, with
And the interference signal on the lead of testing needle wiring styletable can be incorporated into test point by the access of testing needle, make the signal of test point
Quality the problem of be affected, so as to improve the security and accuracy of test.
Embodiment two
Fig. 2 is a kind of structural representation for test device for printed circuit board (PCB) that the utility model embodiment two is provided
Figure, as shown in Fig. 2 this is used for the test device of printed circuit board (PCB), including：At least one test block 210, fixed plate 220 and letter
Number processing unit 230, at least one described test block 210 sets the testing needle provided such as the utility model any embodiment, institute
Stating the upper end of the test head 110 of testing needle is used to contact with the test point of printed circuit board (PCB) 240, the binding post of the testing needle
120 bottom is arranged in the fixed plate 220 and is connected with the input of the signal processing apparatus 230.
Wherein it is possible to which fixed plate 220 is stably placed on testing jig, at least one survey is installed in the fixed plate 220
Test specimen 210 sets the testing needle provided such as the utility model any embodiment, and the installation site of the testing needle is just to printed circuit
The test point of plate 240, during so as to which printed circuit board (PCB) 240 is placed in fixed plate, can make the measuring head of all testing needles
The upper end (can be contact) in portion is contacted with the test point of printed circuit board (PCB) 240.The bottom of the binding post 120 of testing needle can pacify
It is connected in fixed plate 220 and with the input of signal processing apparatus 230, so as to which the signal-under-test at test point is passed through
Testing needle is sent to signal processing apparatus 230.Signal processing apparatus 230 can be and right by being detected to signal-under-test
Detection signal is handled, so as to judge whether the various functions of printed circuit board (PCB) 240 are normally realized.The wiring of testing needle
The bottom of post 120 may be mounted in fixed plate 220 and be connected with signal source, so as to by required power supply signal and communication signal
Etc. corresponding position on printed circuit board (PCB) 240 is incorporated into, so that the quilt needed for the normal work of printed circuit board (PCB) 240, and then generation
Test signal.
It is preferred that, the test device for being used for printed circuit board (PCB) also includes display device 250, the display device 250
Input is connected with the output end of the signal processing apparatus 230.
Wherein, the input of display device 250 is connected with the output end of signal processing apparatus 230, makes display device 250 can
So that the operation result of signal processing apparatus 230 to be shown, so that user watches and uses.
The technical scheme of the present embodiment, by the way that resistance unit 140 is introduced into testing needle, to increase the overall electrical resistance of testing needle
Value, solves testing needle and test point Contact, has larger discharge current and produces, and can damage circuit-under-test, and survey
Interference signal on the lead of testing needle wiring styletable can be incorporated into test point by the access of test point, make the matter of the signal of test point
The problem of amount is affected, so as to improve the security and accuracy of test device test.
Note, above are only preferred embodiment of the present utility model and institute's application technology principle.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, can carried out for a person skilled in the art various bright
Aobvious change, readjust and substitute without departing from protection domain of the present utility model.Therefore, although pass through above example
The utility model is described in further detail, but the utility model is not limited only to above example, is not departing from
In the case that the utility model is conceived, other more equivalent embodiments can also be included, and scope of the present utility model is by appended
Right determine.
Claims (10)
1. a kind of testing needle, including test head (110), binding post (120) and outer tube (130), the test head (110)
Lower end inserted from the top of the outer tube (130), the bottom of the upper end of the binding post (120) from the outer tube (130)
End insertion；Characterized in that, also including：Resistance unit (140), the resistance unit (140) is arranged in the outer tube (130),
The resistance unit (140) abuts the lower end of the test head (110) and the upper end of the binding post (120) respectively.
2. testing needle according to claim 1, it is characterised in that the inner surface of the outer tube (130) applies insulating layer coating.
3. testing needle according to claim 1, it is characterised in that the outer tube (130) is insulation tube.
4. testing needle according to claim 1, it is characterised in that the outer tube (130) and the test head (110)
Threaded connection.
5. testing needle according to claim 1, it is characterised in that the outer tube (130) and the binding post (120) spiral shell
Line is connected.
6. testing needle according to claim 1, it is characterised in that the resistance unit (140) is resistance.
7. testing needle according to claim 1, it is characterised in that the test head (110) includes contact (111), bullet
Spring (113) and inner sleeve (112), inner sleeve (112) upper end open, the spring (113) are arranged on the inner sleeve
(112) in, the lower end of the contact (111) is arranged in the inner sleeve (112), the bottom surface of the contact (111) with it is described
The top of spring (113) is abutted.
8. testing needle according to claim 7, it is characterised in that inner sleeve (112) lower end closed, the spring
(113) bottom is abutted with the bottom interior surface of the inner sleeve (112).
9. a kind of test device for printed circuit board (PCB), it is characterised in that including：At least one test block (210), fixed plate
(220) and signal processing apparatus (230), at least one described test block (210) is set as described in any one of claim 1 to 8
Testing needle, the upper end of the test head (110) of the testing needle is used to contact with the test point of printed circuit board (PCB) (240), institute
State testing needle binding post (120) bottom be arranged on the fixed plate (220) on and with the signal processing apparatus (230)
Input is connected.
10. the test device according to claim 9 for printed circuit board (PCB), it is characterised in that also including display device
(250), the input of the display device (250) is connected with the output end of the signal processing apparatus (230).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720207583.4U CN206523531U (en) | 2017-03-03 | 2017-03-03 | A kind of testing needle and the test device for printed circuit board (PCB) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720207583.4U CN206523531U (en) | 2017-03-03 | 2017-03-03 | A kind of testing needle and the test device for printed circuit board (PCB) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206523531U true CN206523531U (en) | 2017-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720207583.4U Active CN206523531U (en) | 2017-03-03 | 2017-03-03 | A kind of testing needle and the test device for printed circuit board (PCB) |
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| Country | Link |
|---|---|
| CN (1) | CN206523531U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112363048A (en) * | 2020-11-23 | 2021-02-12 | 江西视晶光电有限公司 | Integrated circuit test needle bed |
-
2017
- 2017-03-03 CN CN201720207583.4U patent/CN206523531U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112363048A (en) * | 2020-11-23 | 2021-02-12 | 江西视晶光电有限公司 | Integrated circuit test needle bed |
| CN112363048B (en) * | 2020-11-23 | 2024-01-23 | 优百顺集团有限公司 | Integrated circuit test needle bed |
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