JP5707270B2 - Outlet measuring probe and voltage measuring instrument - Google Patents

Description

  The present invention generally relates to a voltage measuring instrument capable of measuring the voltage of an outlet, and more particularly, to an outlet measuring probe capable of measuring voltage by applying it to outlets of various shapes having different intervals between outlet holes. It is a voltage measuring device provided with such a socket measuring probe.

  2. Description of the Related Art Conventionally, digital multimeters that can measure voltage, current, electrical resistance, and the like with a measurement changeover switch and display measurement results on a digital display unit have been widely used. An example of a digital multimeter is shown in FIG.

  As shown in this example, the digital multimeter 1 </ b> A is usually composed of a meter body 2 and a pair of measurement probes 3 (3 </ b> A, 3 </ b> B) connected to the meter body 2. The meter body 2 is provided with a measurement changeover switch 4 and a digital display unit 5.

  For example, when measuring the voltage of the outlet, the user uses a DMM (Digital Multimeter) 1A functioning as a voltage measuring instrument, and the measurement changeover switch 4 provided as a rotary switch, for example, provided in the meter body 2. Turn to set the measurement target. That is, for example, the rotary switch 4 is turned from the “OFF” position to the “ACV” position, and the function is set to voltage measurement.

  Next, the user generally holds the meter body 2 and one measurement probe in one hand and the other measurement probe in the other hand and contacts the outlet metal terminal by inserting it into the outlet hole. And measure.

  As described above, the conventional method for measuring the voltage of the outlet requires that both the measurement probes 3 (3A, 3B) are securely inserted and brought into contact with the hole of the outlet using both hands. . Moreover, the operation is not easy. For this reason, the operation may be repeated a plurality of times in order to reliably insert the measurement probe into the hole of the outlet and contact it. Further simplification of measurement methods is desired.

  Therefore, Patent Document 1 discloses a voltage measuring instrument 1A that can more reliably and easily perform voltage measurement of an outlet as shown in FIGS. 6 and 7 attached to the present application. The voltage measuring instrument 1A described in Patent Document 1 has a shape that allows the user to hold the meter body 2 with one hand, and the measurement probes 3 (3A, 3B) are detachable on both sides of the meter body 2 respectively. A support structure 20 (20A, 20B) that can be supported is provided.

  Therefore, when measuring the voltage of the outlet, the user supports the measurement probe 3 (3A, 3B) fixedly on both sides of the meter body 2 by the support structure 20 (20A, 20B). Thereby, the probes 32 and 32 of the measurement probe 3 (3A, 3B) are set to the space | interval (W) of a socket hole. Accordingly, the user inserts the probes 32, 32 of the measurement probe 3 (3A, 3B) set and held at a predetermined interval (W) together with the meter body 2 held in one hand into the hole of the outlet, Can be reliably contacted.

  As described above, the voltage measuring instrument 1A described in Patent Document 1 can fix the measurement probe 3 (3A, 3B) to the meter body 2, and the interval between the fixed measurement probes 3 (3A, 3B) ( Since W) is the interval between the holes of the outlet, there is an advantage that the voltage of the outlet can be reliably measured with one hand, easily and with good operability.

European Patent Application No. 1164379

  However, the voltage measuring instrument 1A described in Patent Document 1 is effective for measuring the voltage of an outlet in which the outlet hole interval (W) is a constant distance. It is difficult to correspond to an outlet.

  An object of the present invention is to provide an outlet measuring probe and a voltage measuring device that can be used for outlets of various countries having different outlet shapes (hole intervals).

  Another object of the present invention is to provide an outlet measuring probe and a voltage measuring instrument that can measure the voltage of the outlet reliably with one hand, easily and with good operability.

The above object is achieved by an outlet measuring probe and a voltage measuring device according to the present invention. In summary, according to one aspect of the present invention, there is provided a measurement probe for measuring the voltage of an outlet, an insulating grip having a substantially cylindrical shape, and a probe provided at a tip portion of the grip. In a pair of measurement probes comprising a barrier that is an annular flange formed on the grip at a predetermined distance from the probe,
The grip is formed with a holding groove on one side and / or the other side of the barrier in the axial direction of the grip and adjacent to the barrier,
When the paired measurement probes are arranged in parallel with each other and are combined together, a part of the outer periphery of the annular flange of one measurement probe is fitted into the holding groove of the other measurement probe, A measurement probe is provided, in which a measurement probe is fixed integrally, and the distance between the probes of the two measurement probes in the pair is set to a predetermined value.

  According to an embodiment of the present invention, the barrier has an elliptical shape whose center coincides with the center axis of the grip or a polygonal shape of a triangle or more.

According to another aspect of the present invention, in a voltage measuring instrument comprising a measuring instrument main body and a pair of measuring probes connected to the measuring instrument main body,
A voltage measuring instrument is provided in which the measuring probe is a measuring probe having any one of the above-described configurations.

According to the present invention,
(1) It can be used effectively for outlets of various countries with different outlet shapes (hole intervals).
(2) The outlet voltage can be reliably measured with one hand, easily and with good operability.
It has the following advantages.

FIG. 1 is a diagram showing an overall configuration of a digital multimeter functioning as a voltage measuring device configured according to the present invention. FIG. 2A is a front view of the measurement probe according to the present invention, and FIG. 2B is a plan view. FIG. 3A is a perspective view of one embodiment of the measurement probe according to the present invention, and FIG. 3B is a perspective view of another embodiment of the measurement probe according to the present invention. c) is a sectional view taken along line III-III in FIG. 3B showing another embodiment of the holding groove. FIG. 4A is a front view of a pair of measurement probes arranged in parallel with each other, and FIG. 4B is a diagram illustrating two measurement probes integrated to measure the voltage of a first-shaped outlet. FIG. 4C is a diagram illustrating a usage mode in which two measurement probes are combined together to measure the voltage of the second-shaped outlet. It is a whole block diagram which shows an example of the conventional digital multimeter. It is a whole block diagram which shows an example of the conventional digital multimeter. It is a whole block diagram for demonstrating the use condition of the conventional digital multimeter shown in FIG.

  Hereinafter, the outlet measuring probe and the voltage measuring device according to the present invention will be described in more detail with reference to the drawings.

Example 1
(Overall configuration of voltage measuring instrument)
FIG. 1 shows an embodiment of an outlet measuring probe and a voltage measuring device configured according to the present invention.

  The overall configuration of the voltage measuring device 1 is the same as that of the digital multimeter 1A used as the conventional voltage measuring device described with reference to FIG. However, the configuration of the measurement probe 3 (3A, 3B) is different.

  That is, as shown in FIG. 1, a voltage measuring device (digital multimeter) 1 includes a measuring device main body (hereinafter referred to as “meter main body”) 2 and a pair of measuring probes 3 (3A) connected to the meter main body 2. 3B). The meter body 2 is provided with a measurement changeover switch 4 and a digital display unit 5.

  Since the paired measurement probes 3A and 3B have the same shape and structure, in the following description, the measurement probes 3A and 3B are generically referred to as the measurement probe 3 unless particularly required to be distinguished. To explain.

  If it demonstrates with reference to Fig.2 (a), in the present Example, the measurement probe 3 is provided with the insulating grip 31 made into the elongate substantially cylindrical shape, A probe 32 is provided so as to protrude from the end face 31a1. The probe 32 is a metal elongated bar, and is electrically connected to the lead wire 33 inside the insulating grip 31. A lead wire 33 is drawn out from the rear end portion 31 b of the grip 31, and the end portion of the lead wire 33 is electrically connected to the meter body 2.

  Conventionally, the grip 31 has a non-slip function for preventing the user's finger from coming into contact with the sliding probe 32 during use. A ring-shaped protruding portion that protrudes in an annular shape, that is, a barrier 34 that is a collar portion, is formed integrally with the grip 31 at a position moved inward by a distance (L) from the distal end surface 31 a 1 of 31.

  According to the present invention, in addition to the conventional “slip prevention function”, the barrier 34 is formed between the two probes 32 and 32 when the two measurement probes 3A and 3B are combined together, as will be described in detail later. The distance (W) is set to a predetermined value (W1, W2) and fixed (see FIG. 4).

  More specifically, according to the present embodiment, as shown in FIGS. 2B and 3A, the barrier 34 has an axis of the measurement probe 3, that is, a center axis and a center (O) of the grip 31. It is formed in an elliptical shape having a coincident minor axis (a) and major axis (b).

  Further, the measurement probe 3 is arranged in the axial direction of the measurement probe 3 with respect to the barrier 34, that is, on the upper side (one side) and the lower side (other side) of the barrier 34 in FIG. Adjacent to the barrier 34, first and second annular holding grooves 35, 36 are formed. Of course, the groove may be formed only on the upper side of the barrier 34 for one measurement probe 3A and only on the lower side for the other measurement probe 3B. Of course, this may be reversed.

  The grooves 35 and 36 are part of the outer periphery of the barrier 34 that has a predetermined thickness (T) of the counterpart measurement probe when the two measurement probes 3 (3A and 3B) are combined together. Are detachably fitted, and both measurement probes (3A, 3B) are integrally fixed, and the distance (W) between the probes 32, 32 is set to a predetermined value (W1, W2).

  Next, with reference to FIG. 4, the usage aspect of the measurement probe 3 (3A, 3B) of the said structure is demonstrated.

(Usage of measurement probe)
According to the voltage measuring instrument 1 provided with the measurement probe 3 (3A, 3B) of the present embodiment, as shown in FIGS.
(1) Two, ie, the first and second measurement probes 3A, 3B, for example, so that the short diameter (a) of the barrier 34 of the first and second measurement probes 3A, 3B is opposed to each other, or The first and second measurement probes 3A and 3B are arranged in parallel to each other so that the long diameters (b) of the barriers 34 of the first and second measurement probes 3A and 3B are opposed to each other (FIG. 4A).
(2) Next, as shown in FIGS. 4B and 4C, the outer peripheral portion of the barrier 34 of the first measurement probe 3A is pushed into the groove 36 of the second measurement probe 3B. At the same time, the outer peripheral portion of the barrier 34 of the second measurement probe 3B is pushed into the groove portion 35 of the first measurement probe 3A.

  That is, as shown in FIG. 4B, the first and second measurement probes 3A and 3B have the short diameter (a) of the barrier 34 facing each other, or as shown in FIG. 4C. Further, the long diameter (b) of the barrier 34 is fixed integrally so as to face each other.

Of course, the above (2) may be as follows. That means
(2) The outer periphery of the barrier 34 of the first measurement probe 3A is pushed into the groove 35 of the second measurement probe 3B. At the same time, the outer peripheral portion of the barrier 34 of the second measurement probe 3B is pushed into the groove 36 of the first measurement probe 3A.

  According to the present embodiment, in the case of FIG. 4B, the interval (W) between the probes 32 of the first and second measurement probes 3A, 3B is the hole interval of the outlet S1 having the first shape. In the case of FIG. 4C, the interval (W) between the probes 32, 32 of the first and second measurement probes 3A, 3B is the hole interval of the second-shaped outlet S2. Set to be the same as W2.

  Although not shown, in the case of the hole interval W3 of the third shape outlet, which is between the hole intervals W1 and W2 of the outlets S1 and S2, the first and second measurement probes 3A and 3B are provided. Is rotated about the axis so that the barriers (grooves) 34 and 34 fit into the mating grooves 35 and 36 at an appropriate diameter position between the short diameter (a) and the long diameter (b). And fix it.

  That is, by making the shape of the barrier 34 elliptical, the interval (W) at which the two measurement probes 3A and 3B are fixed can be continuously changed by using a place having a different diameter. Thereby, it can utilize for the voltage measurement of the outlet of various countries from which an outlet shape (hole space | interval) differs.

As understood above, according to the present invention,
(1) It can be used for outlets of various countries with different outlet shapes (hole intervals).
(2) The outlet voltage can be reliably measured with one hand, easily and with good operability.
It has the following advantages.

Example 2
In the first embodiment, the barrier 34 of each measurement probe 3A, 3B has been described as an elliptical shape having a short diameter (a) and a long diameter (b), but the shape of the barrier 34 is limited to this. is not. For example, as shown in FIG. 3B, each measurement probe may be a rectangle having a short side (a) and a long side (b). In some cases, the measurement probe, that is, a polygonal shape of a triangle or more with different distances from the axial center (O) of the grip 31 to each side can be used.

  In the case of the present embodiment, the holding grooves 35 and 36 are not necessarily formed in the grip 31 in a circular shape. For example, as shown in FIG. 3C, the linear grooves 35 (36) are formed. It is also possible.

  When the barrier 34 is triangular, quadrangular, or other polygonal as in the second embodiment, the change in the distance between the probes 32 and 32 is gradual as compared to the case where the barrier 34 is elliptical. It cannot be changed and adjusted continuously.

However, also in this embodiment, the same function and effect as in Embodiment 1, that is,
(1) It can be used for outlets of various countries with different outlet shapes (hole intervals).
(2) The outlet voltage can be reliably measured with one hand, easily and with good operability.
It is clear that it has the following advantages.

1 Digital multimeter (voltage measuring instrument)
2 Meter body (measuring instrument body)
3 (3A, 3B) Measuring probe 4 Switch 5 Display unit 31 Grip 31a Grip tip 32 Probe 33 Lead wire 34 Barrier 35, 36 Holding groove

Claims (3)

A measuring probe for measuring a voltage of an outlet, wherein the insulating grip is substantially cylindrical, a probe provided at a tip of the grip, and a position at a predetermined distance from the probe. In a pair of measurement probes provided with a barrier that is an annular flange formed on the grip,
The grip is formed with a holding groove on one side and / or the other side of the barrier in the axial direction of the grip and adjacent to the barrier,
When the paired measurement probes are arranged in parallel with each other and are combined together, a part of the outer periphery of the annular flange of one measurement probe is fitted into the holding groove of the other measurement probe, A measurement probe, wherein a measurement probe is fixed integrally, and a distance between the probes of both measurement probes forming a pair is set to a predetermined value.   2. The measurement probe according to claim 1, wherein the barrier has an elliptical shape whose center coincides with a center axis of the grip or a polygonal shape of a triangle or more. In a voltage measuring instrument comprising a measuring instrument main body and a pair of measuring probes connected to the measuring instrument main body,
The voltage measuring instrument according to claim 1, wherein the measuring probe is the measuring probe according to claim 1.

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