TWI464408B - Conductivity testing rod - Google Patents

Description

Conductivity test rod

The invention relates to a conductivity test bar.

With the advancement of technology, magnesium alloy materials are widely used on the outer shell and parts of the product to achieve light, thin, electromagnetic shielding and better heat dissipation. However, the magnesium-aluminum alloy material is easily oxidized and decomposed, so the surface of the outer shell of the product is often covered with a protective film which can conduct electricity and can isolate the magnesium-aluminum alloy material from the air to prevent oxidative decomposition of the magnesium-aluminum alloy material. Since the protective film is very thin, it is easily scratched by the probe of the test bar when the conductivity of the protective film is tested.

In view of the above, it is necessary to provide a conductive test rod which can effectively test the conductivity of the protective film without scratching the protective film.

A conductive test rod comprising a casing, a joint, a probe and a soft probe, the outer casing is sleeved on the probe, the tail end and the front end of the probe are extended from the outer casing, and the joint is mounted on the At the end of the probe, the soft probe is mounted on the front end of the probe.

The conductive test rod of the present invention is provided with a soft probe, so that the soft probe is in elastic contact with the protective film to be tested, and the conductivity of the protective film to be tested is accurately tested without scratching the protective film to be tested.

100‧‧‧ first housing

120‧‧‧Back cover

112‧‧‧Window

121‧‧‧Second through hole

300‧‧‧ Probe

320‧‧‧Keeping device

500‧‧‧Soft probe

110‧‧‧ sleeve

111‧‧‧First through hole

113‧‧‧ center marking

200‧‧‧ second housing

310‧‧‧Marking

400‧‧‧ connector

600‧‧ ‧ spring

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view showing a preferred embodiment of the conductive test bar of the present invention.

2 is a state diagram of the conductive test bar of the present invention before being tested.

Fig. 3 is a state diagram when tested using the conductivity tester of the present invention.

Referring to FIG. 1 and FIG. 2 together, a preferred embodiment of the conductive test bar of the present invention includes a housing, a probe 300, a connector 400, a soft probe 500, and a spring 600. The housing includes a first housing 100 and a second housing 200.

The first housing 100 includes a cylindrical sleeve 110 that is open at one end and a rear cover 120. The sleeve 110 is provided with an external thread on an outer side wall of the opening, and the other end of the sleeve 110 defines a first through hole 111. A second through hole 121 is disposed on the cover surface of the rear cover 120. The inner wall of the rear cover 120 away from the end surface of the cover surface is provided with an internal thread, and the sleeve 110 and the rear cover 120 are supported by the external thread and the inner cover. The threads are fixedly connected. A transparent window 112 is further defined on the outer side wall of the first housing 100. A center mark 113 is disposed on the outer side wall of the first housing 100 along the center line of the long side of the window 112. In the present embodiment, the first housing 100 has a height of 14 cm and a radius of 0.7 cm.

The second housing 200 is a hollow circular table, and both ends thereof are open. One end of the second housing 200 is fixedly connected to one end of the first housing 100 on which the first through hole 111 is opened. In this embodiment, the height of the second casing 200 is 1 cm, and the radius of one end connected to the first casing 100 is 0.5 cm, and the radius of the other end is 0.7 cm.

The probe 300 is a metal round bar having a radius slightly smaller than the first through hole 111 and the second through hole 121 or equivalent to the radius of the first through hole 111 and the second through hole 121. The probe 300 is further provided with an indicator 310. The probe 300 forms a protruding fastening device 320 along the circumferential surface at a quarter of the end of the probe 300. The probe 300 is away from the fastening device. One end of 320 is a collet (not shown).

The connector 400 is connected to a resistance tester (not shown) by a wire for contacting a protective film (not shown) to be tested. In the present embodiment, the flexible probe 500 is a cylindrical conductive foam having a radius of 0.5 cm and a height of 0.5 cm. In other embodiments, the soft probe 500 may have other shapes and materials as long as it has good electrical conductivity and is soft at the end that is in contact with the protective film to be tested.

In the assembly, the end of the probe 300 adjacent to the fastening device 320 passes through the spring 600 and the second through hole 121 of the rear cover 120 to be connected to the joint 400. Then, the other end of the probe 300 is sequentially connected to the soft probe 500 through the first through hole 111 and the second housing 200, and the rear cover 120 is locked with the sleeve 110. At this time, one end of the spring 600 abuts against the rear cover 120 and the other end abuts against the fastening device 320. An end of the probe 300 adjacent to the securing device 320 is provided with an external thread. The joint 400 is provided with a screw hole to cooperate with the thread of the probe 300 to mount the joint 400 on the probe 300. The probe 300 clamps the soft probe 500 by the collet.

In other embodiments, the securing device 320 can also be disposed at other positions of the probe 300 according to the size of the spring 600, so that one end of the spring 600 abuts against the rear cover 120 and the other end abuts the securing device. 320 can be.

The conductive test rod of the present invention is used as follows: Referring to FIG. 2, the indicator 310 of the probe 300 of the conductive test rod before the test is located at the lower edge of the window 112 away from the rear cover 120.

Please refer to FIG. 3 , which is a state diagram when the conductivity test is performed using the conductivity test bar. The user touches the soft probe 500 with the protective film to be tested, and gently presses the first A housing 100 is pressurized by the probe 300 into the first housing 100, and the flexible probe 500 is contracted into the second housing 200. When the indicator 310 of the probe 300 is at the same horizontal line as the center mark 113, the soft probe 500 can be in sufficient contact with the protective film to be tested, and the conductivity of the protective film to be tested can be tested. After the test is completed, the soft probe 500 is no longer in contact with the protective film to be tested. Due to the action of the spring 600, the probe 300 then travels away from the second housing 200 until the probe of the conductive test rod The indication 310 of 300 is again at the lower edge of the window 112 away from the rear cover 120.

The conductive test rod of the present invention is elastically contacted with the protective film to be tested by using the soft probe 500, and can accurately test the conductivity of the protective film to be tested without scratching the protective film to be tested.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

100‧‧‧ first housing

120‧‧‧Back cover

121‧‧‧Second through hole

300‧‧‧ Probe

400‧‧‧ connector

600‧‧ ‧ spring

110‧‧‧ sleeve

111‧‧‧First through hole

200‧‧‧ second housing

320‧‧‧Keeping device

500‧‧‧Soft probe

Claims (9)

A conductive test rod comprising a casing, a joint, a probe and a soft probe, the outer casing is sleeved on the probe, the tail end and the front end of the probe are extended from the outer casing, and the joint is mounted on the a soft probe disposed at a front end of the probe, the flexible cover is disposed at a front end of the probe, the outer casing includes a first housing, and a window is defined on an outer sidewall of the first housing, along an outer sidewall of the first housing The center line of the long side of the window is provided with a center mark, and the probe is provided with a mark. When conducting the conductivity test, the mark on the probe is at the same horizontal line as the center mark. The conductive test rod of claim 1, wherein the first housing comprises a cylindrical sleeve having an open end and a rear cover, and the other end of the sleeve defines a first through hole, and thereafter a second through hole is disposed on the cover surface of the cover, the rear cover is mounted at one end of the sleeve opening, and the tail end of the probe extends from the second through hole to the first housing, and the front end of the probe is The first through hole extends out of the first housing. The conductive test bar of claim 2, wherein the probe forms a protruding fastening device along the circumferential surface near the trailing end, and a spring is disposed between the back cover and the fastening device. The conductive test rod of claim 2, wherein the sleeve has a height of 14 cm and a radius of 0.7 cm. The conductive test bar of claim 2, wherein the outer casing comprises a second casing disposed at a front end of the first casing, the second casing being a hollow circular table having a height 1 cm, the end of the first housing connected to the first housing has a radius of 0.5 cm and the other end has a radius of 0.7 cm. The conductive test rod of claim 2, wherein the outer side wall of one end of the sleeve is provided with an external thread, and the inner wall of the end of the rear cover away from the cover surface is provided with an internal thread, the sleeve and the sleeve The back cover is fixedly connected by the external thread and the internal thread. The conductive test rod according to claim 1, wherein the soft probe is a conductive bubble cotton. The conductive test rod according to claim 1, wherein the soft probe has a shape of a cylinder. The conductive test rod according to claim 8, wherein the soft probe has a radius of 0.5 cm and a height of 0.5 cm.