CN203772908U

CN203772908U - Insulated metal probe

Info

Publication number: CN203772908U
Application number: CN201420175460.3U
Authority: CN
Inventors: 苏宝军
Original assignee: DONGGUAN LIANWEI ELECTRONIC Co Ltd
Current assignee: DONGGUAN LIANWEI ELECTRONIC Co Ltd
Priority date: 2014-04-11
Filing date: 2014-04-11
Publication date: 2014-08-13
Anticipated expiration: 2024-04-11

Abstract

The utility model belongs to the PCB electrical testing technical field and relates to an insulated metal probe. The insulated metal probe includes a probe body; the top portion of the probe body is provided with a probe head; the bottom of the probe body is provided with a probe tail; the surface of the probe body is provided with an insulating layer; the length of the probe head L1 is in a range of 1.5 to 4.5mm; the length of the probe tail L2 is in a range of 1 to 3mm; and the ratio of the length of the probe head L1 to the length of the probe tail L2 is L1/L2=3/2. When a test piece of which the test points are dense, and a plurality of probes are needed to perform testing simultaneously, the probe bodies of the plurality of probes will not interfere each other; and the lengths of the probe head and the probe tail are designed to be optimal size values, and therefore, material waste can be avoided, and effective contact of the probe head and a PAD test point of the PCB can be ensured; the probe tail effectively contacts with a wire of a wire disc, so that effective electric connection can be realized, and therefore, effective electric testing of the PCB can be realized, and a testing effect is excellent.

Description

A kind of insulating metal probe

Technical field

The utility model relates to pcb board electrical testing technical field, relates in particular to a kind of insulating metal probe.

Background technology

PCB(Printed Circuit Board) be printed-wiring board (PWB), be called for short pcb board, be one of vitals of electronics industry.Almost every kind of electronic equipment, such as accutron, counter, computing machine, communication electronic device and military armament systems etc., as long as there are the electronic devices and components such as integrated circuit need to realize electrical connection, all need to use pcb board.

In the production run of pcb board, in order to verify the quality of pcb board, need to carry out various detection tests to pcb board, conventionally need to test the function of the components and parts such as the open defect of pcb board, open circuit, short circuit, IC etc.Wherein, the open defect test of pcb board is adopted to visual detection method; The functional test of the components and parts such as open circuit to pcb board, short circuit, IC adopts electrical testing method; The critical piece that in prior art, pcb board is carried out to the test machine of electrical testing is probe tool, probe tool comprises again drum and dials, dials is provided with probe, in the time pcb board being carried out to electrical testing work, the two ends of the probe of dials setting contact respectively the PAD(pad of pcb board) and the metal connection point of drum, realize energising, thereby can carry out effective electrical testing to pcb board.

But it is not good that the probe of the probe tool of prior art exists following defect to cause the electrical testing effect of pcb board: one, the needle body does not carry out insulation protection, there is the problem of electric leakage; Two,, without the probe backshank design exposing, cause the electrical connection poor effect of backshank; Three, probe tip and backshank protruded length ratio are unreasonable, the electrical testing effect of impact to pcb board.

Utility model content

The purpose of this utility model be for the deficiencies in the prior art provide a kind of syringe needle and backshank protruded length Proportionality design reasonable, can guarantee pcb board to carry out the insulating metal probe of effective electrical testing.

For achieving the above object, a kind of insulating metal probe of the present utility model, comprises the needle body, and the top of the needle body is provided with syringe needle, and the bottom of the needle body is provided with backshank, and the surface of the described needle body is provided with insulation course, the length L of syringe needle ₁for 1.5-4.5mm, the length L of backshank ₂for 1-3mm; Wherein, the length L of syringe needle ₁length L with backshank ₂ratio: L ₁/ L ₂=3/2.

Preferably, the length L of described syringe needle ₁for 3mm, the length L of backshank ₂for 2mm.

Concrete, described insulation course is insullac, the surface of the needle body is located in insullac spray.

Wherein, the described needle body comprises that tungsten core and tungsten wicking surface plate the Gold plated Layer of establishing.

Wherein, the end of described syringe needle is coniform, circular-arc or tooth mouth shape.

Wherein, the end of described backshank is coniform, circular-arc or tooth mouth shape.

Wherein, the diameter D of the described needle body is 0.02-0.03mm.

Preferably, the diameter D of the described needle body is 0.02mm.

The beneficial effects of the utility model: a kind of insulating metal probe of the present utility model, arranges insulation course in the surface of the needle body, the length L of syringe needle ₁be designed to 1.5-4.5mm, the length L of backshank ₂be designed to 1-3mm, and limit the length L of syringe needle ₁than the ratio L of the length of backshank ₂: L ₁/ L ₂=3/2; Above-mentioned design proposal can be guaranteed needle body insulation, and when in the time that the comparatively intensive detection piece of test point needs many probes to test simultaneously, the many needle bodys of stretching forward can not produce interference each other; In addition, the length L of syringe needle ₁design, at 1.5-4.5mm value range, can guarantee that syringe needle has enough length to contact with the PAD test point of pcb board, again can be not long because of syringe needle, and in the time of test, syringe needle can cause damage to pcb board through pcb board, and can avoid waste of material; And the length L of backshank ₂design, in 1-3mm value range, is avoided backshank waste of material, and can guarantee that the wire that backshank touches drum completely effectively tests; After tested, the length L of syringe needle ₁than the length L of backshank ₂, i.e. L ₁/ L ₂=3/2, be best probe structure design.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the Section View along A-A line in Fig. 1.

Fig. 3 is the local enlarged diagram at B place in Fig. 1.

Fig. 4 is the local enlarged diagram at C place in Fig. 1.

Reference numeral comprises:

10-needle body, 11-syringe needle, 12-backshank

13-tungsten core, 14-Gold plated Layer, 20-insulation course.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in detail.

As shown in Figures 1 to 4, a kind of insulating metal probe of the present utility model, comprises the needle body 10, and the top of the needle body 10 is provided with syringe needle 11, and the bottom of the needle body 10 is provided with backshank 12, and the surface of the described needle body 10 is provided with insulation course 20, the length L of syringe needle 11 ₁for 1.5-4.5mm, the length L of backshank 12 ₂for 1-3mm; Wherein, the length L of syringe needle 11 ₁length L with backshank 12 ₂ratio: L ₁/ L ₂=3/2.Concrete, in the surface of the needle body 10, insulation course 20 is set, the length L of syringe needle 11 ₁be designed to 1.5-4.5mm, the length L of backshank 12 ₂be designed to 1-3mm, and limit the length L of syringe needle 11 ₁than the ratio L of the length of backshank 12 ₂: L ₁/ L ₂=3/2; Above-mentioned design proposal can guarantee that the needle body 10 insulate, and when in the time that the comparatively intensive pcb board detection piece of test point needs many probes to test simultaneously, the many needle bodys of stretching forward 10 can not produce interference each other; In addition, the length L of syringe needle 11 ₁design, at 1.5-4.5mm value range, can guarantee that syringe needle 11 has enough length to contact with the PAD test point of pcb board, again can be not long because of syringe needle 11, and in the time of test, syringe needle 11 can cause damage to pcb board through pcb board, and can avoid waste of material; And the length L of backshank 12 ₂design, in 1-3mm value range, is avoided backshank 12 waste of material, and can guarantee that the wire that backshank 12 touches drum completely effectively tests; After tested, the length L of syringe needle 11 ₁than the length L of backshank 12 ₂, i.e. L ₁/ L ₂=3/2, be best probe structure design.

Preferably, according to the experience realizing in production run, be L by the length of syringe needle 11 ₁be designed to 3mm, the length L of backshank 12 ₂be designed to 2mm and be best probe structure design, can be applicable to the pcb board electrical testing of multiple industry, in the situation that ensureing operator's safety, this kind of structure both can have been avoided waste of material, can guarantee that again syringe needle 11 effectively contacts with the PAD test point of pcb board, backshank 12 effectively contacts with the wire of drum, realizes effectively conduction and connects, thereby realize the effective electrical testing of pcb board, test respond well.

Concrete, described insulation course 20 is insullac, when production, insullac spraying is arranged to the surface of the needle body 10, produces very convenient, quick; Insullac is frivolous, and cost is low, and the technique effect of generation is more remarkable.

In the present embodiment, the described needle body 10 comprises the Gold plated Layer 14 that tungsten core 13 and tungsten core 13 plated surfaces are established, and tungsten core 13 is as inner core body structure, then establishes Gold plated Layer 14 in the plated surface of tungsten core 13, in conjunction with after the needle body 10 structures make electric conductivity better.

In the present embodiment, the end of described syringe needle 11 is coniform, circular-arc or tooth mouth shape; The end of described backshank 12 is coniform, circular-arc or tooth mouth shape; When concrete application, select the planform of different syringe needle 11, backshank 12, to meet, the PAD test point of different pcb boards is carried out to electrical testing inspection, guarantee that the scope of application of probe of the technical program is wider.

In the present embodiment, the diameter D of the described needle body 10 is 0.02-0.03mm, and the diameter D of the concrete needle body 10 can 0.02mm, 0.025mm or 0.03mm; Preferably, the needle body 10 diameter D the most carefully can be 0.02mm; The needle body 10 of this diameter value can complete the problem that common probe test cannot complete, and can effectively improve the electrical testing effect of the PAD test point to pcb board.

Known the utility model is to have above-described good characteristic in sum, is made it manufacture assembling and use, and promotes the usefulness not having in conventional art and has practicality, becomes a novel product structure that has a practical value.

Above content is only preferred embodiment of the present utility model, for those of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, this description should not be construed as restriction of the present utility model.

Claims

1. an insulating metal probe, comprise the needle body (10), the top of the needle body (10) is provided with syringe needle (11), and the bottom of the needle body (10) is provided with backshank (12), it is characterized in that: the surface of the described needle body (10) is provided with insulation course (20) length L of syringe needle (11) ₁for 1.5-4.5mm, the length L of backshank (12) ₂for 1-3mm; Wherein, the length L of syringe needle (11) ₁length L with backshank (12) ₂ratio: L ₁/ L ₂=3/2.

2. a kind of insulating metal probe according to claim 1, is characterized in that: the length L of described syringe needle (11) ₁for 3mm, the length L of backshank (12) ₂for 2mm.

3. a kind of insulating metal probe according to claim 1, is characterized in that: described insulation course (20) is insullac, and the surface of the needle body (10) is located in insullac spray.

4. a kind of insulating metal probe according to claim 1, is characterized in that: the described needle body (10) comprises the Gold plated Layer (14) that tungsten core (13) and tungsten core (13) plated surface are established.

5. a kind of insulating metal probe according to claim 1, is characterized in that: the end of described syringe needle (11) is coniform, circular-arc or tooth mouth shape.

6. a kind of insulating metal probe according to claim 1, is characterized in that: the end of described backshank (12) is coniform, circular-arc or tooth mouth shape.

7. a kind of insulating metal probe according to claim 1, is characterized in that: the diameter D of the described needle body (10) is 0.02-0.03mm.

8. a kind of insulating metal probe according to claim 7, is characterized in that: the diameter D of the described needle body (10) is 0.02mm.