JPH0645898Y2 - Test probe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a test probe, and more specifically,
The present invention relates to a test probe in which a measuring rod to be brought into contact with a measurement site is arranged so that its length can be adjusted.

[Prior Art] Measuring instruments such as testers are used as circuit meters necessary for measuring voltage, current, and resistance when installing and repairing electrical equipment.

The test probe is used when connecting to the input terminal of such a measuring instrument and trying to measure the voltage or the like of the site to be measured, and it has a measuring rod for making direct contact with the site. Has been formed.

In addition, some of the above-mentioned test probes have a long measuring rod so that they can flexibly cope with the case where the measured part is in a deep hole in a component or inside the device body. There are some adapters that are formed differently and are prepared separately so that they can be used as needed.

4 and 5 show a conventional example of a test probe having a replaceable adapter measuring rod.

Among them, in the test probe shown in FIG. 4, the measuring rod 3 is integrally fixed to the side of the gripping insulating cylindrical body 2, and the male screw 4 is preliminarily provided on the proximal end side of the measuring rod 3. As a result, the probe body 1 is formed. Further, the adapter measuring rod 5 detachably attached to the probe body 1 side has a hole 6 at the base end portion for accommodating the measuring rod 3 on the probe body 1 side, and The whole is formed by engraving the female screw 7 to be screwed with the male screw 4, and it is possible to selectively use the screw.

On the other hand, in the test probe shown in FIG. 5, the probe main body is provided with a screw hole 8 formed of a female screw into which the adapter measuring rod 5 can be inserted via the base end of the insulating cylinder 2 for gripping. 1 is formed and the adapter measuring rod 5 is formed.
Is formed so as to be attachable to and detachable from the screw hole via a male screw 9 formed at the base end portion, whereby the adapter measuring rod 5 can be selectively used.

[Problems to be Solved by the Invention] By the way, in the case of the conventional test probe shown in FIGS. 4 and 5, the adapter measuring rod 5 is replaced to flexibly respond to the specific situation of the measured site. While doing so, it is possible to smoothly perform the measurement work of the voltage and the like by the measuring instrument.

However, the adapter measuring rod 5 needs to be prepared separately from the gripping insulating cylindrical body 2 in a required number, so that it may be lost when the management is neglected. In addition, when replacing this, there is a disadvantage that the attaching / detaching operation is complicated and the efficiency of the measurement work is reduced.

[Means for Solving the Problems] The present invention has been made in view of the problems seen in the above-mentioned conventional example, and the structural feature thereof is that the holder is provided via the tip portion of the insulating cylindrical body for gripping. A probe body having a fixed portion, a measuring rod housed in the probe body so as to be able to move forward and backward through an opening provided with a slit in the holder portion, and a chuck sleeve detachably attached to the holder portion. The measuring rod can be fixed to the probe main body at the opening by changing the length thereof by the pressing force of the chuck sleeve when the measuring rod is attached to the holder.

[Operation] Therefore, the measuring rod housed in the probe main body can be freely moved back and forth by expanding the diameter of the opening by releasing the pressing force by removing the chuck sleeve from the holder. Can be stored.

Therefore, when the tip end side of the measuring rod is projected from the probe body, it can be adjusted to a desired length, and then the chuck sleeve is attached to the holder part to apply a pressing force. Then, the opening of this holder part can be reduced in diameter through the slit,
The measuring rod can be immovably fixed to the probe body after the tip side is adjusted to a desired length.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a preferred embodiment of the present invention, which includes a probe main body 11 and a probe main body 11 as a whole.
The probe main body 11 is composed of a measuring rod 22 that is formed so as to be stored in the probe 11, and a chuck sleeve 24 that is detachably attached to the probe main body 11 to fix the measuring rod 22. Is formed of a holding insulating cylinder 12 having a size and a length and a holder portion 15 fixedly arranged via the tip of the insulating cylinder 12, and the insulating cylinder 12 is , Has an appropriate length and thickness by a synthetic resin material, and has an internal space through the bottom portion 14.
The other end of a cord 30 having one end connected to an input terminal of a measuring instrument (not shown) is introduced into the inside of 13 and formed.

Further, the holder portion fixedly arranged on the insulating cylinder body 12
Reference numeral 15 denotes a whole, which is formed of a conductive metal material such as a copper material, and has a base end portion 16 having a step and having a small diameter, which is inserted into the internal space 13 of the insulating cylindrical body 12. It is fixed by doing so, for example, by providing the terminal portion 17 at the open end of the base end portion 16 side as shown in the illustrated example, soldering of the core wire 31 in the cord 30 introduced into the insulating cylindrical body 12 is performed. It is made possible.

Further, a through hole 18 is bored in the holder portion 15 in the axial direction, and the opening 19 located on the front side of the holder portion 15 and the internal space 13 of the insulating cylindrical body 12 are communicated with each other through the through hole 18. There is. Further, on the side of the opening portion 19 of the holder portion 15, the through hole 18
1 or more, preferably three slits 20 of appropriate length are arranged at equal intervals, as shown in FIG.

The holder portion 15 can be fixed to the insulating cylindrical body 12 by a suitable fixing means such as press-fitting or adhesion, in addition to screwing means.

In the probe main body 11 thus formed, the measurement rod 22 made of a conductive metal material such as a copper material is opened through the through hole 18 of the holder portion 15 and the internal space 13 of the insulating cylinder 12. It is stored so that it can be moved back and forth from section 19.

On the other hand, the chuck sleeve 24 that is detachably attached to the probe main body 11 is formed by using an insulating material such as synthetic resin, and the holder portion of the probe main body 11 in the axial direction thereof. An introduction hole 25 corresponding to the outer shape of 15 is provided.

The chuck sleeve 24 is attached to and detached from the holder portion 15 of the probe main body 11 by engraving a male screw 21 on the holder portion 15 side and a female screw 26 on the chuck sleeve 24 side as shown in the figure. Although not shown in the figure, it can be carried out by adopting an appropriate detachable fitting structure or engagement structure. Due to the pressing force of the chuck sleeve 24 when it is moved,
It suffices that the length of the side can be made variable so that the measuring rod 22 can be fixed in the opening 19. In addition, chuck sleeve
On the peripheral surface of 24, several other groove portions 26 are engraved in the axial direction,
It is desirable that the surface is provided with a concavo-convex pattern so as to have a desirable design and an anti-slip function.

Since this device is constructed as described above,
The measurement rod 22 housed in the probe main body 11 can be expanded or retracted freely by removing the chuck sleeve 24 from the holder portion 15 or by loosening it without removing it, and freely moving it back and forth. It can be stored in the state.

Therefore, when the tip portion 23 side of the measuring rod 22 is projected from the probe body 11, it can be adjusted to a desired length, and then the chuck sleeve 24 is attached to the holder portion.
By attaching to 15 or tightening, this holder part
It is possible to reduce the diameter of the opening 19 of the fifteen through the slit 20, and adjust the tip 23 side to a desired length, and then measure.
22 can be fixed to the probe body 11 so that it cannot move.

[Advantage of Device] As described above, according to the device of the present invention, the measuring rod housed in the probe main body is expanded in opening by releasing the pressing force by removing the chuck sleeve from the holder. It can be housed with its advance / retreat freely. Therefore, when the tip end side of the measuring rod is projected from the probe body, it can be easily adjusted to a desired length.After that, the chuck sleeve is attached to the holder part to apply a pressing force. By giving it, it is possible to reduce the diameter of the opening of this holder through the slit, and adjust the tip to the desired length with only one measuring rod, and then move it to the probe body. It is possible to perform measurement work that is fixed improperly and flexibly responds to the situation of the measurement target site.

[Brief description of drawings]

1 is a sectional view showing an embodiment of the present invention with a chuck sleeve removed, and FIG. 2 is an AA in FIG.
Fig. 3 is a general view showing a state when viewed from the direction of the arrow, Fig. 3 is a cross-sectional view showing the state of the embodiment shown in Fig. 1 in use, and Figs. 4 and 5 are all conventional examples. FIG. 11 …… Probe body, 12 …… Insulation cylinder, 13 …… Internal space, 14 …… Bottom, 15 …… Holder, 16 …… Base end, 17 …… Terminal, 18 …… Through hole, 19 …… Aperture, 20 …… Slit, 21 …… Male thread, 22 …… Measuring rod, 23 …… Tip, 24 …… Chuck sleeve, 25 …… Introduction hole, 26 …… Female thread, 27 …… Groove

Claims (1)

[Scope of utility model registration request] 1. A probe main body in which a holder is fixed via an end of an insulating cylinder for gripping, and a probe main body accommodated in a retractable manner in the probe main body through an opening provided with a slit in the holder. Measuring rod and a chuck sleeve detachably attached to the holder,
A test probe characterized in that the measuring rod can be fixed to the probe main body at the opening by changing the length thereof by the pressing force of the chuck sleeve when the measuring rod is attached to the holder.