CN201130196Y - Test needle for printed circuit board - Google Patents

Abstract

The utility model relates to an electric measuring instrument, especially a printed circuit board test fixture's of improvement test needle combination. The utility model aims at providing an improved printed circuit board test pin combination with better electrical connection. In order to achieve the above object, the present invention provides the following solutions: the utility model provides a printed circuit board test needle, includes wire, test needle, and test machine is connected to wire one end which characterized in that: the end of the wire part at the other end of the wire is combined with a metal guide connecting piece used for contacting with the test needle, and the metal guide connecting piece can contact with the test needle.

Description

PCB Test Pins

technical field

The utility model relates to an electric measuring instrument, in particular to an improved test needle combination of a printed circuit board test fixture.

Background technique

The printed circuit board test device is installed on the test machine to test whether the circuit of the printed circuit board has defects such as short circuit. The printed circuit board test device mainly includes a jig, which is composed of several test boards, and each test board is combined with an array of fixed rods according to the actual needs. Each hole is equipped with a pogo pin [the spring pin has a built-in spring in the through hole, and a probe is set on the upper end of the spring, and a copper sleeve with one end closed and the other end open is also set in the through hole, and then placed in the through hole. The copper sleeve is equipped with a spring and a probe, etc.], one end of the pogo pin is used as a contact point for contacting the printed circuit board to be tested, and the other end is connected to a wire [the wire is connected to the spring or the copper sleeve]. In addition, it is composed of fixtures and needle beds. The fixtures of this printed circuit board testing device are usually composed of several test boards, and each test board is combined with an array of fixed rods according to actual needs. It has a through hole drilled according to the contact position of the printed circuit board to be tested, and a test pin is installed in the through hole to realize the slope of the probe. The contact point is in contact, and the other end is used as a contact with the pogo pin of the needle bed; the needle bed is equipped with a pogo pin, and the two ends of the pogo pin protrude from the needle bed, one end is used for contact with the test pin of the fixture, and the other end is connected to a wire . In the prior art printed circuit board testing device, the wire at the other end of the wire is wound on a horn joint [usually with a winding gun], and the horn joint is then connected to the cable connector of the testing machine, so that the signal is collected to test the printed circuit board. circuit board. Taking Taiwan patents as an example, the patent for improving the structure of probes in Taiwan New Bulletin No. 00509326 (refer to the patent announcement data on November 01, 2002), which is co-located in a composite fixture, is located on each of the circuit boards to be tested. Corresponding to the pins, the probe is composed of: a needle body with a plug-in part at the bottom, and a spring connected with a wire at the end. The needle body is set in the fixture and is located directly above the spring. The socket part and the top of the spring are in contact with each other; the characteristic is that the top of the spring is integrally wound and formed to accept the supporting part of the socket; with this design, no additional processing is required to manufacture supports The top block used can relatively reduce the manufacturing cost. China Taiwan New Announcement No. 00367961 Patent for adapter plate of PCB special test machine and universal test machine fixture (refer to the data of the patent announcement on August 21, 1999). A large hole is provided in the hole, which is larger than the inner diameter of the hole, and a conductive elastic component is provided in the large hole, so that one side of the adapter plate can be placed in a special-purpose On the jig, the conductive sleeve of the special jig penetrates the hole of the adapter plate and contacts the conductive elastic component, and the other side of the adapter plate is used for the joint of the general jig, so that the needle of the general jig The post can pass through the hole of the adapter board to contact the conductive elastic component, so that the general-purpose fixture can use the special-purpose testing machine to detect the printed circuit board. China Taiwan Invention Publication No. 200722761 Printed Circuit Board Detection Probe Structure Improvement Patent (June 16, 2007 patent disclosure data reference), the detection probe device is composed of a probe, a compression spring and a wire, wherein the probe and the compression spring are respectively placed in the positioning holes of the two corresponding moulds, and then placed on the laser spot welding machine for welding. After the welded probe and the compression spring are taken out of the mold, one end of the wire is welded The other end of the compression spring is inserted and welded, and then installed on the inspection jig to inspect the circuit board, which can effectively reduce manufacturing costs and man-hours and reduce the impedance of the overall structure of the probe device to improve the accuracy of circuit board inspection. Manufactured into smaller diameter probes for inspection of more precise and small circuit boards. China Taiwan's new No. M276999 detection circuit board fixture wire device patent (on October 1, 2005 patent announcement data reference), it is provided with several pinholes on a pin seat, in each pinhole is provided with a probe and A spring; a lower plate of the needle seat, which is arranged at one end of the needle seat, and a thread hole is arranged on the lower plate of the needle seat relative to the position of the pinhole, and is characterized in that: the hole diameter of the thread hole is larger than the hole diameter of the pinhole; a wire, which is set At each wire hole, one end of the wire extends into the pinhole. The fixture patent of the new No. M245411 detection circuit board in Taiwan, China (refer to the patent announcement data on October 1, 2004), which includes: both sides of the needle holder are provided with a needle holder upper plate and a needle holder lower plate, and the upper needle holder The plate is stacked with the lower fixing plate of the dial, the elastic cloth and the upper fixing plate of the dial; A number of pinholes, perforations and wire holes corresponding to the points to be tested on the circuit board, and probes are provided in the pinholes, which pass through the perforations upwards; wires are arranged in the pinholes, and the wires located in the pinholes , the above-mentioned wire is a single-core wire, which is characterized in that: one end of it is machined into a T-shaped wire head, and its outer diameter is larger than the wire hole; the other end of the wire passes through the hole provided on the lower plate of the needle holder. The wire hole is connected with the computer, and a spring is arranged between the wire head and the probe. It can be seen from the above previous documents that in the prior art printed circuit board testing device, it is used as a wire for signal collection, or a spring is used as an intermediary, or a spring is used to cooperate with a needle cover to connect the test needle. As an electrical connection, the spring is solid to provide a buffer However, if it is used as a necessary component for electrical connection, it is often caused by poor contact due to factors such as spring deformation and oxidation, and it is easy to cause misjudgment. The above is the biggest deficiency in the prior art, and this deficiency has become a problem that the industry needs to overcome urgently.

Contents of the invention

The purpose of this utility model is to provide an improved printed circuit board test pin assembly with better electrical connection.

In order to achieve the above object, the utility model proposes the following scheme:

A printed circuit board test needle, including a wire, a test needle, one end of the wire is connected to a testing machine, and it is characterized in that: the end of the wire part at the other end of the wire is combined with a metal lead that is used to contact the test needle, and the metal lead can be connected with the test needle Test pin contact.

The beneficial effects of the utility model are:

The utility model mainly includes a wire. One end of the wire is connected to the horn joint to connect to the cable connector of the testing machine. As a collection of signals, the end of the wire at the other end of the wire is combined with a metal lead. It is used to contact with the test pins to conduct test signals, and has a better electrical connection.

The utility model further provides a printed circuit board test needle, and an elastic component is pierced on the lead portion at the other end of the lead.

The utility model also provides a printed circuit board test needle. The head end of the metal lead has a bearing part matching the needle shape of the test needle to be contacted, so as to provide better electrical connection.

Brief description of the drawings

Fig. 1 is a three-dimensional exploded view of an embodiment of the utility model.

Fig. 2 is a partly combined sectional view of the embodiment of the utility model.

Explanation of main component symbols

1 lead wire 10 lead wire part

2 elastic components

3 metal guides 30 sockets

4 test pins

5 wire reel 50 wire holes

51 perforations 6 pins

Detailed ways

In order to achieve the technical means for the aforementioned purpose of the utility model, an embodiment is enumerated hereby, and it is described as follows in conjunction with the drawings.

The utility model provides an improved printed circuit board test needle combination structure, and the structures and actions of the relevant needle discs, wire reels and test pins are all prior art, and will not be repeated here.

First please refer to the three-dimensional exploded view of the utility model embodiment in Fig. 1. It can be seen from the figure that the utility model mainly includes a wire 1, and one end of the wire 1 is connected to the horn connector to be connected to the cable connector of the testing machine, as a collection of signals (horn The joints and other structures are not shown in the prior art figure), and the end of the lead part 10 at the other end of the lead 1 is combined with a metal lead 3 [combination can be commonly used welding, welding, clamping, etc.], thus forming the present invention. The utility model has a complete test needle combination structure, and an elastic component 2 can be threaded on the lead part 10 at the other end of the aforementioned lead 1 [in this embodiment, the elastic component 2 is a spring], and the metal guide 3 is used for connecting with The test pin 4 is in contact to conduct a test signal. Please refer again to Fig. 2 shown in the combined sectional view of the utility model embodiment, which shows the implementation state of the utility model applied to the printed circuit board test fixture. From Fig. 2, it can be known that the utility model lead 1 is located on multiple A wire reel 5 composed of sheet plates, the wire reel 5 has a wire hole 50 for passing the wire part 10 of the wire and a perforation 51 for accommodating the elastic component 2 and the metal conductor 3, and the test pin 4 is arranged on the upper end such as On the dial 6, when testing, the testing machine moves to press down the testing needle 4, and then the metal conductor 3 can be touched, and then the signal is transmitted to the testing machine computer through the wire 1 to judge whether the contact is normal or short circuited. After the test needle 4 is raised, the metal guide 3 can be restored to the original position by the setting of the elastic component 2 . Since the test pin 4 and the metal lead-in piece 3 are made of rigid metal material, they can be connected in direct contact with each other, which should have better electrical connectivity, but in the present utility model, the setting of the elastic component 2 is only to increase the compression and The mechanical elastic function of recovery is an unnecessary component and does not have the function of electrical connection.

Furthermore, since there are different 4-pin shapes of test pins on the market for different test methods of printed circuit board fixtures, the head end of the aforementioned metal guide 3 of the utility model has a bearing portion matching the 4-pin shape of the test pins to be contacted. 30 for better electrical connectivity.

The above is only one of the preferred feasible embodiments of the present utility model, and is not used to limit the scope of the present utility model. All those who are familiar with this art can use the equivalents made by the specification of the utility model and the scope of the patent application. Structural changes should be included in the patent scope of the utility model.

Claims (3)

1. printed circuit board test pin, comprise lead (1), testing needle (4), lead (1) one end links test machine, it is characterized in that: lead (1) in addition the wire portion (10) of end terminal be used as metal lead piece (3) combination that contacts with testing needle, metal lead piece (3) can contact with testing needle (4).

2. printed circuit board test pin as claimed in claim 1 is characterized in that: be equipped with elastic parts (2) on the wire portion (10) that this lead (1) is held in addition.

3. printed circuit board test pin as claimed in claim 1 is characterized in that: this metal lead piece (3) head end has the portion of holding (30) that treats engaged test pin (4) aciculiform that cooperates.

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