CN210323139U - PCB detection probe - Google Patents
PCB detection probe Download PDFInfo
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- CN210323139U CN210323139U CN201921056453.0U CN201921056453U CN210323139U CN 210323139 U CN210323139 U CN 210323139U CN 201921056453 U CN201921056453 U CN 201921056453U CN 210323139 U CN210323139 U CN 210323139U
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Abstract
The utility model relates to a PCB detection probe and a manufacturing method thereof, wherein the PCB detection probe comprises a probe needle tube with a movable conductive needle penetrating through one end; the movable conductive needle comprises a needle rod and a needle head; the outer diameter of the needle rod is larger than that of the needle head; the probe needle tube comprises a first guide tube body and a second guide tube body; the probe needle tube also comprises a limiting piece which is fixed at one end of the first guide tube body facing the second guide tube body and used for limiting the outward movement of the needle rod; the inner diameter of the second guide tube body is matched with the outer diameter of the needle head; the needle rod is guided through the first guide tube body, the limiting piece limits the maximum extending position of the needle rod, and the needle head is guided through the second guide tube body; because the second direction body internal diameter is with syringe needle external diameter looks adaptation, second direction body and syringe needle be face contact promptly, not only have better direction effect to the syringe needle, also make the resistance between syringe needle and the second direction body more stable, and the electric conductivity is stronger more stable during the detection, and signal transmission decay is still less.
Description
Technical Field
The utility model relates to a test probe technical field, more specifically say, relate to a PCB test probe.
Background
The probe is used for detecting the on-off of a circuit on a PCB and generally comprises a needle tube, a conductive needle and a spring arranged in the needle tube, wherein the conductive needle comprises a needle rod and a needle head. When the circuit detection is carried out, the needle head is pressed, so that the spring tightly supports the needle rod, and the needle head has a good electric contact effect with a point to be detected on the PCB. To ensure smooth and orderly movement, as shown in fig. 7, two sets of protrusions are formed on the needle tube by axial extrusion, one set of protrusions is used for limiting the needle rod, and the other set of protrusions is used for guiding the needle head. However, the probe structure has the following defects: the salient points and the needle head are in point contact, so that the contact area is small, the resistance is unstable, and the transmission capability is weak; and the guiding effect is not ideal.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned defect, provide a PCB test probe and a PCB test probe's manufacturing method.
The utility model provides a technical scheme that its technical problem adopted is:
on one hand, the PCB detection probe comprises a probe needle tube, wherein a movable conductive needle is arranged at one end of the probe needle tube in a penetrating manner; wherein the movable conductive needle comprises a needle rod and a needle head; the outer diameter of the needle rod is larger than that of the needle head; the probe needle tube comprises a first guide tube body corresponding to the needle rod and a second guide tube body corresponding to the needle head; the probe needle tube further comprises a limiting piece which is fixed at one end of the first guide tube body facing the second guide tube body and used for limiting the needle rod to move outwards; the inner diameter of the second guide tube body is matched with the outer diameter of the needle head.
Preferably, the stopper is annular; along the extending direction of the needle head, the inner diameter of the limiting part is gradually reduced; the minimum inner diameter of the limiting piece is not smaller than the outer diameter of the needle head.
Preferably, the inner wall of the limiting member is arc-shaped or linear.
Preferably, the probe needle tube is composed of the second guide tube, the limiting piece and the first guide tube body; the second guide pipe body and the first guide pipe body are distributed on two sides of the limiting part; the second guide pipe, the limiting part and the first guide pipe body are integrally formed.
Preferably, the smallest inner diameter of the limiting part is matched with the outer diameter of the needle head.
Preferably, the probe needle tube further comprises a connecting tube body, two ends of the connecting tube body are connected with the second guide tube body and the limiting piece; the inner wall of the connecting tube body is not contacted with the outer surface of the needle head.
Preferably, the second guide tube, the connecting tube body, the limiting piece and the first guide tube body are sequentially arranged to form the probe needle tube; the second guide tube, the connecting tube body, the limiting piece and the first guide tube body are integrally formed.
Preferably, only one end of the first guide pipe body is provided with an opening; the opening is used for extending the needle head; the PCB detection probe also comprises the movable conductive pin and a spring positioned in the first guide tube body; the two ends of the spring respectively support against the first guide tube body and the needle rod.
On the other hand, a method for manufacturing a PCB detection probe is provided, based on the PCB detection probe, wherein the method comprises the following steps:
selecting a pipe with the inner diameter matched with the outer diameter of the needle rod;
inserting a movable conductive needle into the tube, extruding a position on the outer wall of the tube, which corresponds to one end of the needle rod connecting needle head, and forming a limiting part;
and continuously extruding the position on the outer wall of the pipe corresponding to the needle head along the extending direction of the needle head to form a second guide pipe body.
Preferably, the extrusion starting point of the second guide tube body is not overlapped with the extrusion part of the limiting piece, and the extrusion end point is overlapped with the tail end of the probe needle tube;
or the extrusion starting point of the second guide pipe body is superposed with the extrusion part of the limiting piece, and the extrusion end point is superposed with the tail end of the probe needle tube;
or the extrusion starting point of the second guide pipe body is not superposed with the extrusion part of the limiting piece, and the extrusion end point is not superposed with the tail end of the probe needle tube.
The beneficial effects of the utility model reside in that: the needle rod is guided through the first guide tube body, the limiting piece limits the maximum extending position of the needle rod, and the needle head is guided through the second guide tube body; because the second direction body internal diameter is with syringe needle external diameter looks adaptation, second direction body and syringe needle be face contact promptly, not only have better direction effect to the syringe needle, also make the resistance between syringe needle and the second direction body more stable, and the electric conductivity is stronger more stable during the detection, and signal transmission decay is still less.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:
fig. 1 is a schematic structural diagram of a PCB detection probe according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a PCB detection probe according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a PCB detection probe according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a PCB detection probe according to a second embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for manufacturing a PCB detection probe according to a third embodiment of the present invention;
fig. 6 is a schematic structural view of a PCB detection probe manufactured by the method for manufacturing a PCB detection probe according to the third embodiment of the present invention;
fig. 7 is a schematic structural view of a conventional PCB inspection probe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Example one
The embodiment of the utility model provides a PCB detection probe, as shown in figure 1 and figure 2, comprising a probe needle tube 2 with a movable conductive needle 1 at one end; the movable conductive needle 1 comprises a needle rod 10 and a needle head 11; the outer diameter of the needle rod 10 is larger than that of the needle head 11; the probe needle tube 2 comprises a first guide tube body 20 corresponding to the needle rod 10 and a second guide tube body 21 corresponding to the needle head 11; the probe needle tube 2 further comprises a limiting piece 22 fixed at one end of the first guide tube body 20 facing the second guide tube body 21 and used for limiting the outward movement of the needle rod 10; the inner diameter of the second guide tube 21 is adapted to the outer diameter of the needle 11, and during movement, the needle shaft 10 is guided by the first guide tube 20, the stopper 22 limits the maximum extension position of the needle shaft 10, and the needle 11 is guided by the second guide tube 21; because second direction body 21 internal diameter is with 11 external diameter looks adaptations of syringe needle, second direction body 21 and syringe needle 11 be face contact promptly, not only have better direction effect to syringe needle 11, also make the resistance between syringe needle 11 and the second direction body 21 more stable, and the conducting capacity is stronger more stable during the detection, and signal transmission attenuation is still less.
As shown in fig. 1, the limiting member 22 is annular, so that the contact area between the limiting member 22 and the needle bar 10 is larger, the limiting effect is good, and the abrasion speed of the limiting member 22 is reduced; along the extending direction of the needle 11, the inner diameter of the limiting member 22 gradually becomes smaller, which is convenient for processing and reduces the cost. Preferably, the inner wall of the limiting member 22 is arc-shaped or linear; the minimum inner diameter of the stop 22 is no less than the outer diameter of the needle 11 to ensure that there is no interference with the movement of the needle 11.
As shown in fig. 1, the minimum inner diameter of the retainer 22 is adapted to the outer diameter of the needle 11, so that the retainer 22 can also play a certain guiding role for the needle 11.
As shown in fig. 1, only one end of the first guiding tube 20 is provided with an opening, and the spring 3 does not slip out after the spring 3 is placed in the first guiding tube 20; the opening is used for extending the needle 11; the PCB detection probe also comprises a movable conductive pin 1 and a spring 3 positioned in the first guide pipe body 20; the two ends of the spring 3 are respectively abutted against the first guide tube body 20 and the needle rod 10, and during detection, the needle head 11 is pressed, so that the spring 3 is abutted against the needle rod 10, and the needle head 11 and a point to be detected on the PCB have good electric contact effect.
As shown in fig. 1, the probe needle tube 2 is composed of a second guide tube 21, a limiting member 22 and a first guide tube body 20; the second guiding pipe body 21 and the first guiding pipe body 20 are distributed on two sides of the limiting member 22, namely, the second guiding pipe body 21 is positioned at the end part; second stand pipe 21, locating part 22 and first guide tube body 20, three integrated into one piece adds man-hour, along the direction of extension of syringe needle 11, continuously extrudes with shaping second guide tube body 21, and second guide tube body 21 is located the tip, then can directly extrude the end during extrusion, need not do the terminal point position mark during batch production, and the processing of being more convenient for, and the holistic shape of probe needle tubing 2 is also more pleasing to the eye.
Example two
The embodiment of the utility model provides a PCB test probe, the same part is not replying with embodiment one, and the difference lies in:
as shown in fig. 3 and 4, the probe needle tube 2 further includes a connecting tube 23 having two ends connected to the second guiding tube 21 and the limiting member 22, and after the limiting member 22 is extruded, the second guiding tube 21 is extruded and separated from the second guiding tube 21 by a distance, so that the second guiding tube 21 and the needle 11 have sufficient contact area to ensure stable resistance, and the second guiding tube 21 with too long length is not formed, which wastes production cost; the inner wall of the connecting tube body 23 is not in contact with the outer surface of the needle 11.
Preferably, the second guide tube 21, the connecting tube 23, the limiting member 22 and the first guide tube 20 are sequentially arranged to form the probe needle tube 2; the second guide tube 21, the connecting tube body 23, the limiting member 22 and the first guide tube body 20 are integrally formed, so that the overall structure of the PCB detection probe is more compact, and the assembly steps are reduced.
EXAMPLE III
The embodiment of the utility model provides a PCB test probe's manufacturing method, based on above-mentioned PCB test probe, as shown in figure 5, including following step:
step S101: selecting a pipe with the inner diameter matched with the outer diameter of the needle rod.
Step S102: and inserting the movable conductive needle into the tube, and extruding the position, corresponding to one end of the needle rod connecting needle head, on the outer wall of the tube to form a limiting part.
Step S103: and continuously extruding the position corresponding to the needle head on the outer wall of the pipe along the extending direction of the needle head to form a second guide pipe body.
The utility model discloses in implementing, the extrusion starting point position and the extrusion terminal point position of second direction body have multiple distribution form, specifically as follows:
the first form: as shown in fig. 3, the extrusion start point of the second guide tube 21 does not coincide with the extrusion point of the stopper 22, and the extrusion end point coincides with the distal end of the probe pin tube 2.
The second form: as shown in fig. 1, the pressing start point of the second guide tube 21 coincides with the pressing position of the stopper 22, and the pressing end point coincides with the distal end of the probe pin tube 2.
The third form: as shown in fig. 6, the extrusion start point of the second guide tube body 21 does not coincide with the extrusion position of the stopper 22, and the extrusion end point does not coincide with the distal end of the probe pin tube 2.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (8)
1. A PCB detection probe comprises a probe needle tube, wherein a movable conductive needle is arranged at one end of the probe needle tube in a penetrating manner; the movable conductive needle is characterized by comprising a needle rod and a needle head; the outer diameter of the needle rod is larger than that of the needle head; the probe needle tube comprises a first guide tube body corresponding to the needle rod and a second guide tube body corresponding to the needle head; the probe needle tube further comprises a limiting piece which is fixed at one end of the first guide tube body facing the second guide tube body and used for limiting the needle rod to move outwards; the inner diameter of the second guide tube body is matched with the outer diameter of the needle head.
2. The PCB test probe of claim 1, wherein the retainer is ring-shaped; along the extending direction of the needle head, the inner diameter of the limiting part is gradually reduced; the minimum inner diameter of the limiting piece is not smaller than the outer diameter of the needle head.
3. The PCB inspection probe of claim 2, wherein the inner wall of the retainer is curved or linear.
4. The PCB inspection probe of claim 2, wherein the probe needle tube is comprised of the second guide tube, the retainer and the first guide tube body; the second guide pipe body and the first guide pipe body are distributed on two sides of the limiting part; the second guide pipe, the limiting part and the first guide pipe body are integrally formed.
5. The PCB test probe of claim 2, wherein a minimum inner diameter of the retainer fits an outer diameter of the needle.
6. The PCB detection probe of claim 1, wherein the probe needle further comprises a connecting tube body having two ends connected to the second guiding tube body and the position limiter; the inner wall of the connecting tube body is not contacted with the outer surface of the needle head.
7. The PCB detection probe of claim 6, wherein the second guide tube, the connecting tube, the retainer and the first guide tube are sequentially arranged to form the probe needle tube; the second guide tube, the connecting tube body, the limiting piece and the first guide tube body are integrally formed.
8. The PCB test probe of claim 1, wherein only one end of the first guide tube body is provided with an opening; the opening is used for extending the needle head; the PCB detection probe also comprises the movable conductive pin and a spring positioned in the first guide tube body; the two ends of the spring respectively support against the first guide tube body and the needle rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921056453.0U CN210323139U (en) | 2019-07-08 | 2019-07-08 | PCB detection probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921056453.0U CN210323139U (en) | 2019-07-08 | 2019-07-08 | PCB detection probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210323139U true CN210323139U (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921056453.0U Active CN210323139U (en) | 2019-07-08 | 2019-07-08 | PCB detection probe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208582A (en) * | 2019-07-08 | 2019-09-06 | 深圳市美锐精密电子有限公司 | A kind of PCB detection probe and its manufacturing method |
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2019
- 2019-07-08 CN CN201921056453.0U patent/CN210323139U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208582A (en) * | 2019-07-08 | 2019-09-06 | 深圳市美锐精密电子有限公司 | A kind of PCB detection probe and its manufacturing method |
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