CN2429833Y

CN2429833Y - Testing probe

Info

Publication number: CN2429833Y
Application number: CN 00219906
Authority: CN
Inventors: 马洪烨
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-04-04
Filing date: 2000-04-04
Publication date: 2001-05-09
Anticipated expiration: 2010-04-04

Abstract

The utility model relates to a meter pen for a universal test meter. A probe (4) is deeply hidden by a spring (7). The other mode is that the probe (4) is deeply hidden by a rotary movable sheath (7) with threads (9) and (14). When the utility model is used for testing, the probe (4) can be exposed locally or entirely according to needs. The results that a short circuit caused by the meter pen in test causes electric equipment to be damaged, etc. can be prevented.

Description

Test pencil

The utility model belongs to a kind of test pencil of using for instrument such as multimeters.

The test pencil that measurement instruments such as existing multimeter are used, it all exposes at the test pencil front end than long probe.When actual measurement, because the probe of test pencil has certain length, be not suitable for specific test occasion again but probe is too short, two connection terminals are collided and short circuit, cause measurement data inaccurate.Electrical equipments such as the particularly modern computing machine that need measure, radar, televisor, it is more and more little all to present volume, and the closeness of components and parts and circuit is more and more high, if test pencil is exposed long, cause that short circuit will cause the damage of various electrical equipments, jeopardize personal safety when serious.

The utility model intends adopting a kind of probe at ordinary times exposed, exposes the probe of all lengths during test as required.

In order to address the above problem, the technical scheme that is adopted, the instrument measurement of being made by insulant is provided with the movable sheath of built-in probe with the head of a handle of test pencil, the base portion of movable sheath withstands with a spring, or movable sheath made spiral, probe is ensconced wherein, and stretch out at its open-ended place, a probe aperture is established in the end of probe, and base portion connects with measurement instrument with lead.The movable sheath that is withstood by spring, should be provided with one at the center of a test pencil handle for placing the cavity that spring is used, cavity extends to the end of test pencil, front opening withstands for insertion activity sheath and by spring, two guide rails of two sides opposition of cavity, the groove of two opposition is laterally established on the top of guide rail, and the base portion of movable sheath has for its square protrusion of sliding in guide rail.Another kind is to establish at the center cavity place of a handle and the akin recessed screw thread of probe length, establishes convex thread at the base portion of movable sheath and constitutes.

Shown in accompanying drawing, in conjunction with the embodiments the utility model is done further explanation.

The diagrammatic sketch that the movable sheath of Fig. 1--test pencil withstands with spring.

The movable sheath that protruding spiral lamination is arranged of Fig. 2--test pencil and the diagrammatic sketch that the center cavity of recessed spiral lamination is arranged.

The probe that probe aperture is arranged of Fig. 3--test pencil.

Two test pencils of [embodiment-1] general-purpose test chart or other test instrumentation, use plastics, insulating material such as rubber are made a handle (2) of the instrument test pencil of two hollows, one end of handle (2) penetrates base portion (3) welding mutually of same probe of a lead (1) (4), the front end of probe (4) is established a probe aperture (13), the center forward end of handle (2) has one can deposit and the cavity (10) of fixing spring (5) usefulness, cavity (10) two sides nearby just are provided with two opposed guide rails (11), guide rail (11) top ends is also established two horizontal grooves (12), spring (5) front end withstands a movable sheath (7), movable sheath (7) is located at the head of test pencil, hollow, also can forwards stretch out in the movable sheath of probe (4) plant (7), the nearly single spring of the base portion of movable sheath (7) (5) has been located opposed two square protrusion (8).

During use, movable sheath (7) top margin of test pencil end should be pressed on the test point that needs test, with test pencil slightly acting force forwards pass, after overcoming the pressure of spring (5), movable sheath (7) promptly can move along the direction that the guide rail in the test pencil (11) limits, probe (4) exposes, and behind the engaged test point, instrument shows test reading and finishes test.Need all exposed test condition of probe (4) when being in certain, can press to movable sheath (7) in the cavity (10) of test pencil inside by guide rail (11), then movable sheath (7) is twisted to groove (12) direction of guide rail (11) two sides and revolve, two square protrusion (8) of movable sheath (7) root are promptly deviate from guide rail (11) and are removed to horizontal two grooves (12), promptly blocked edge in groove (12) by spring (5) compressing, movable sheath (7) is no longer ejected, probe (4) is all exposed, uses when inserting for lead-in wire when reducing the error spy and at the most advanced and sophisticated rear of probe (4) probe aperture (13) is set and is exclusively used in test transistor or integrated package for convenient test.

On the wall of the cavity (10) that [embodiment-2] is set with the test pencil front end of test instrumentations such as multimeter a rectangular recessed screw thread (14) is set, the length of recessed screw thread (14) is with movable sheath (7), root with movable sheath (7) is provided with one section convex thread (9) again, so that probe (4) is owing to the turn of movable sheath (7) is stretched, thereby the length of probe (4) can be set arbitrarily.

The instrument test pencil of above-mentioned two kinds of forms can be at the electrical equipment build-in test of connection terminal comparatively dense, and the probe of avoiding test pencil is long and cause short circuit and damage electrical equipment, and the protection personal safety.

Claims

1, a kind of test pencil, it is characterized in that the Meter Test of being made by insulant is provided with the movable sheath (7) of built-in probe (4) with a handle (2) head of test pencil, the base portion of movable sheath (7) withstands with a spring (5), or movable sheath (7) made spiral (9) (14), probe (4) is ensconced wherein, and can stretch out at its open-ended place, a probe aperture (13) is established in the end of probe (4), and its base portion (3) constitutes with the measurement instrument connection with lead (1).

2, test pencil as claimed in claim 1, it is characterized in that being withstood movable sheath (7) by spring (5), should establish one at the center of a test pencil handle (2) for the cavity (10) of placing spring (5) usefulness, cavity (10) extends to the end of test pencil, front opening withstands for insertion activity sheath (7) and by spring (5), two sides opposition, two guide rails (11) at cavity (10), the groove (12) of two opposition is laterally established on the top of guide rail (11), and the base portion of movable sheath (7) has its square protrusion of sliding in guide rail (8) of confession to constitute.

3, test pencil as claimed in claim 1 is characterized in that locating to establish the exposed akin recessed screw thread of length (14) of same probe (4) at the center cavity (10) of a handle (2), establishes convex thread (9) at the base portion of movable sheath (7) and constitutes.