JP6700099B2 - Operation tool for electrical measurement of test probe - Google Patents

Description

  The present invention relates to a test probe electrical measurement operation tool used when performing electrical measurement using two test probes, and more specifically, it is possible to operate and measure two test probes with one hand. The present invention relates to an operation tool for electrical measurement of a test probe that is made possible.

  As one of the electric measurement methods, there is a method in which two test probes are connected to an electric measuring device such as a tester and the electric characteristic between two points of a measurement site in a measurement target is measured. In this type of test probe, as described in Patent Document 1, a metallic contact portion (probe) is provided at the tip of a pen-shaped grip portion, and a lead connected from the other end to an electric measuring instrument. A probe with a drawn wire is often used.

  Usually, when measuring voltage, current, etc. using this type of test probe, hold the two test probes on the plus side and the minus side with one hand and make contact with the terminals such as the terminal block of the switchboard. I am trying to let you.

  Therefore, since both hands are blocked during the measurement, it may be difficult to read the numerical value of the measuring device or record the measured value during the measurement.

  Further, as shown in FIG. 6, when operating the two test probes P1 and P2 while holding the chopsticks with one hand H, when there is a step in the way of holding and/or the angle and/or the measurement site, either one of them is used. There is a case where only the test probe of (1) contacts the terminal portion of the measurement target (for example, the land portion in the case of the circuit board), and the other test probe does not contact the terminal portion of the measurement target.

JP, 10-239350, A

  Therefore, an object of the present invention is to provide an operation tool for electrical measurement of a test probe, which can hold two test probes with one hand and simultaneously bring them into contact with a site to be measured.

In order to solve the above problems, the present invention provides an electrical measurement operating tool used when performing electrical measurement using two test probes, a first test probe and a second test probe,
A first probe holder that detachably holds the first test probe; and a second probe holder that detachably holds the second test probe, wherein the first probe holder and the second probe holder are connected to each other. It is characterized in that the contact portions of the probe holders are connected to each other by means of means so as to be rotatable in a direction of approaching or separating from each other and relatively slidable along the axial direction of the test probe. ..

  As a preferable configuration therefor, the connecting means includes a first connecting portion provided on the first probe holder side, a second connecting portion provided on the second probe holder side, the first connecting portion, and the first connecting portion. The connecting shaft is inserted into the second connecting portion, and the connecting shaft insertion hole on the side of the first connecting portion is an elongated hole formed along the axial direction of the test probe.

  Preferably, a plunger mechanism having a compression coil spring housed in a cylinder and a slider biased by the compression coil spring is provided on the side of the first connecting portion, and the connecting shaft serves as the slider. Connected.

  Further, a tightening means for generating a frictional force against rotation is provided between the first connecting part and the second connecting part, and the first probe holder and the second probe holder are predetermined through the tightening means. It is advisable to fix them while maintaining the opening angle of.

  According to the present invention, the two test probes can be operated with one hand by setting the opening angle to any one. Further, since the first probe holder and the second probe holder can slide relative to each other, it is possible to surely bring each of the test probes into contact with the measurement site while performing one-handed operation.

1 is a perspective view showing an operation tool for electrical measurement of a test probe according to an embodiment of the present invention. The (a) front view, the (b) rear view, the (c) top view, the (d) bottom view, the (e) left side view, and the (d) right side view of the above-mentioned electrical measurement operating tool. The (a) perspective view of the said electrical measurement operation tool, (b) exploded perspective view. The front view which shows the state which (a) opened the opening angle of the said electrical measurement operation tool, and (b) expanded it. (A), (b) Operation explanatory drawing of the plunger mechanism with which the said electrical measurement operation tool is equipped. FIG. 3 is a schematic perspective view showing an example in which two test probes are held and operated with one hand.

  Next, an embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited to this.

  As shown in FIG. 1, the present invention is an operating tool 1 for holding with one hand the first and second two test probes P1 and P2 connected to a measuring device body such as a tester (not shown).

  The test probes P1 and P2 used in this embodiment both have a pencil shape in which the outer diameter gradually decreases from the front end side toward the rear end side, and contact portions (also referred to as probe tips) C1 and C2 are provided at the front ends thereof. It is provided. In addition, lead wires L1 and L2 connected to the measuring instrument body are drawn out from the rear ends of the test probes P1 and P2, respectively.

  The test probes P1 and P2 are collar portions (annular protrusions also referred to as barriers) F1 and F2 at predetermined portions on the tip end side for alerting the fingers so as not to shift toward the contact portions C1 and C2 during measurement work. Is equipped with.

  When it is not necessary to distinguish between the test probes P1 and P2, the test probes P are generically referred to, and the collar portions F1 and F2 and the contact portions C1 and C2 are also generically referred to as the collar portion F and the contact portion C. Say

  The operating tool 1 has a first probe holder 2 holding one of the first test probes P1 and a second probe holder 3 holding the other second test probe P2, which are connected via a connecting means. The contact portions C1 and C2 are rotatably connected to each other in a direction in which they approach or separate from each other.

  In this embodiment, the connecting means includes a connecting portion 4 on the side of the first probe holder 2 and a connecting portion 5 on the side of the second probe holder 3, one of the connecting portions 4 includes the plunger mechanism 40. The first probe holder 2 and the second probe holder 3 are relatively slidable.

  Referring also to FIGS. 2 and 3, the first probe holder 2 is formed in a cylindrical shape having a first insertion hole 21 into which the test probe P1 is inserted, and its side surface (right side surface in FIG. 1). And a connecting portion 4 for connecting to the second probe holder 3 of the other party. A cylinder case 41 of a plunger mechanism 40, which will be described later, is integrally included in the connecting portion 4.

  In this embodiment, the first probe holder 2 has a pair of holder members 2a and 2b which are divided into two (half-divided) along a cross section passing through the central axis of the first insertion hole 21, and one holder member 2a. On the side surface (left side surface in FIG. 2(c)) of the above, there is provided a projecting piece 22a for fixing the holder members 2a and 2b in a state of being aligned with each other. A screw insertion hole 221 for the set screw S1 is provided at the center of the protruding piece 22a.

  On the side surface (left side surface in FIG. 2(c)) of the other holder member 2b, a screw fastening portion 22b to which the fastening screw S1 is screwed is provided, and at the center thereof, the fastening screw S1 is screwed. A female screw hole 222 is formed.

  The cylinder case 41 has a cylindrical shape in which a cylinder 42 is formed, and is arranged on the side surface of the first probe holder 2 so that the axis of the cylinder 42 and the axis of the first insertion hole 21 are parallel to each other. ing.

  In this embodiment, the cylinder case 41 is divided (halved) into two together with the holder members 2a and 2b, and one case member 41a is provided on the side surface (right side surface in FIG. 2C) of the holder member 2a. The case member 41b is integrally formed, and the other case member 41b is integrally formed on the side surface (right side surface in FIG. 2C) of the holder member 2b.

  A screw insertion portion 411 for a connecting screw S2 as a connecting shaft that connects the first probe holder 2 and the second probe holder 3 is formed on the one case member 41a. The screw insertion portion 411 includes a rectangular opening that extends along the axial direction of the cylinder 42.

  Further, a locking portion 43 for locking the locking claw 44 of the other case member 41b is provided at the side end (the right end in FIG. 2A) of the case member 41a. The locking portion 43 is formed in an arch shape having a locking hole 431 in the center of which the locking claw 44 is inserted.

  The other case member 41b also has a screw insertion portion 412 through which the connecting screw S2 is inserted. The screw insertion portion 412 also includes a rectangular opening extending along the axial direction of the cylinder 42, and an opening that is combined with the screw insertion portion 411 to allow the connecting screw S2 to slide along the axial direction of the cylinder 42. To form a part. The screw insertion portions 411, 412 may be oval instead of square holes.

  Further, the case member 41b is provided with a locking claw 44 that is a counterpart of the locking hole 431. The locking claw 44 is composed of a tongue piece that is erected substantially vertically from the side end (the right end in FIG. 2A) of the case member 41b toward the locking hole 431, and the locking claw is provided at the tip thereof. Is equipped with.

  According to this, the holder members 2a and 2b are opposed to each other and the locking portion 43 and the locking claw 44 are fitted to each other, and then the projecting pieces 22a and 22b are screwed with the set screw S1. 2a and 2b are integrated.

  A cylindrical cylinder 42 is formed inside the cylinder case 41 as the holder members 2a and 2b face each other and are matched with each other. A compression coil spring 45 and a slider 46 that is spring-biased by the compression coil spring 45 are housed inside the cylinder 41.

  The slider 46 has its lower end abutted against the upper end of the compression coil spring 45 and is always biased upward. The slider 46 is provided with a screw insertion hole 461 in a direction orthogonal to the axial direction of the cylinder 42.

  According to this, the connecting screw S2 is inserted into the screw insertion hole 461 through the screw insertion portion 411 of the one case member 41a and is pulled out from the screw insertion portion 412 of the other case member 41b, whereby the connection screw S2 is formed. The first probe holder 2 and the second probe holder 3 can rotate along the axis of the connecting screw S2 and slide along the axis of the cylinder 42 via the.

  Next, the second probe holder 3 is formed in a cylindrical shape having a second insertion hole 31 into which the test probe P2 is inserted, and the side surface (the left side surface in FIG. 1) of the first probe holder 2 is formed. A connecting portion 5 as a counterpart to the connecting portion 4 is integrally formed.

  In this embodiment, the second probe holder 3 has holder members 3a and 3b that are divided into two (half) along a cross section that passes through the central axis of the second insertion hole 31, and by matching each other, Two probe holders 3 are formed.

  A connecting member 5a forming one side of the connecting portion 5 is provided on the side surface (left side surface in FIG. 2A) of one holder member 3a. The connecting member 5a includes a first base portion 51a that is horizontally pulled out from a side end of the holder member 3a, a first step portion 52a that is bent substantially at a right angle from the other end of the first base portion 51a, and a tip of the first step portion 52a. And a first connecting plate 53a that is bent substantially at a right angle and extends horizontally.

  With reference to FIG. 2, the first base portion 51a has a protruding piece shape that extends horizontally from the side end of the holder member 3a, and extends from the base end side (holder member 3a side) to the tip end side (first step portion 52a side). ), the width is gradually narrowed toward the bottom. The first base portion 51a is adapted to fit along the second base portion 51b of the other holder member 3b, and a screw insertion hole 511 through which the set screw S3 is inserted is provided at the center thereof.

  The first step portion 52a is bent substantially at a right angle from the tip of the first base portion 51a and extends in parallel along the insertion direction of the connecting screw S2, and the first connecting plate 53a is provided on the outer peripheral surface of the cylinder case 41. It has a length along which it abuts.

  The first connecting plate 53a has a shape of a rectangular projecting piece that is bent at a right angle from the tip of the first step portion 52a and extends with an equal width, and a connecting screw S2 is inserted in the center thereof to serve as a rotation fulcrum. A first bearing hole 531 is provided.

  Further, on the other side surface (right side surface in FIG. 3) of the holder member 3a, a locking portion 54 for locking the locking claw 55 of the other holder member 3b is provided. The locking portion 54 has a locking hole 541 in the center, and the locking claw 55 is locked in the locking hole 541.

  On the side surface (left side surface in FIG. 3) of the other holder member 3b, a connecting member 5b that constitutes the other of the connecting portions 5 is provided. The connecting member 5b includes a second base portion 51b that is horizontally pulled out from a side end of the holder member 3b, a second step portion 52b that is bent substantially at a right angle from the other end of the second base portion 51b, and a tip of the second step portion 52b. And a second connecting plate 53b which is bent substantially at a right angle and extends horizontally.

  The second base portion 51b has a protruding piece shape that extends horizontally from the side end of the holder member 3b, and has a width that gradually narrows from the base end side (holder member 3b) toward the tip end side (first step portion 52b side). It has a trapezoidal shape. The second base portion 51b is provided with a screwing portion 512 to which the set screw S3 is screwed together with the first base portion 51a.

  The second step portion 52b is bent substantially at a right angle from the tip of the second base portion 51b and extends in parallel along the insertion direction of the connecting screw S2, and the second connecting plate 53b is provided on the outer peripheral surface of the cylinder case 41. It has a length along which it abuts.

  The second connecting plate 53b is in the form of a rectangular projecting piece that is bent at a right angle from the tip of the second step portion 52b and extends with an equal width, and the connecting screw S2 is inserted in the center thereof to form the first bearing hole. A second bearing hole 532 serving as a fulcrum of rotation is provided together with 531.

  The second bearing hole 532 is a female screw that is screwed with a male screw (not shown) formed at the tip of the connecting screw S2, and the cylinder case 41 is connected between the connecting plates 53a and 53b by tightening the connecting screw S2. And a predetermined frictional force with respect to the rotation of the first probe holder 2 and the second probe holder 3 is obtained according to the screw tightening amount. That is, the connecting screw S2 also serves as a tightening means for generating a frictional force.

  On the other side surface (right side surface in FIG. 3) of the holder member 3b, a locking claw 55 that is locked to the locking portion 54 of the holder member 3a is provided. The locking claw 55 is composed of a tongue piece that is erected substantially vertically from the substantially center of the side end of the second holder member 3b, and has a locking claw portion at its tip.

  Here, an example of an assembly procedure of the operation tool 1 will be described. Regarding the first probe holder 2, the compression coil spring 45 and the slider 46 are housed in the cylinder 42 of the cylinder case 41, and one end sides of the case members 41a and 41b are engaged by the engagement portion 43 and the engagement claw 44. After being stopped, the first probe holder 2 including the connecting portion 4 having the plunger mechanism 40 is temporarily fixed without tightening the other end side with the set screw S1 in consideration of the time of inserting the test probe P1. Assemble.

  Regarding the other second probe holder 3, after one end side of the holder members 3a and 3b is locked by the locking portion 54 and the locking claw 55, the connecting members 5a and 5b are pulled toward each other by the set screw S3, Assemble the second probe holder 3 having 5. At this time, it is recommended that the set screw S3 is not strongly tightened in consideration of when the test probe P2 is inserted.

  Then, the cylinder case 41 of the connecting portion 4 is arranged between the connecting plates 53a and 53b of the connecting portion 5, and the connecting screw S2 is passed from the first bearing hole 531 on the connecting plate 53a side through the screw insertion hole 461 of the slider 46. It is screwed into the second bearing hole (female screw) 532 on the side of the connecting plate 53b. At this time, the connecting screw S2 is not strongly tightened.

  At the time of measurement, one test probe P1 is inserted into the first insertion hole 21 of the first probe holder 2 from the rear end side until the flange portion F1 contacts the end portion of the first probe holder 2, and the set screw S1 is inserted. Tighten and fix.

  Similarly, the other test probe P2 is inserted into the second insertion hole 31 of the second probe holder 3 from the rear end side until the flange portion F2 contacts the end portion of the second probe holder 3, and the set screw S3 is inserted. Tighten and fix.

  Then, the connecting screw S2 is appropriately tightened to generate a frictional force between the connecting portion 4 and the connecting portion 5, which is a resistance against rotation.

  In this manner, the first probe holder 2 and the second probe holder 3 are rotatably connected to each other with the connecting screw S2 as the central axis, so that the pitch (spacing) of the measurement site (not shown) can be adjusted. As shown in (a), the contact portions C1 and C2 of the test probes P1 and P2 can be rotated in the direction of approaching each other, or as shown in FIG.

  It should be noted that the test probes P1 and P2 can be held at a predetermined rotational position by the above-mentioned frictional force. However, when a plurality of measurement sites having the same pitch are provided, such as a terminal board of a switchboard. For example, it is preferable that the connecting screw S2 is strongly tightened to fix the rotation angles of the test probes P1 and P2 so as not to easily slip.

  Further, the first probe holder 2 and the second probe holder 3 can be slid relative to each other by the plunger mechanism 40 provided in the connecting portion 4. In the contact state), the compression coil spring 45 urges the second probe holder 3 above the first probe holder 2 (to the rear side of the test probe P).

  Therefore, as shown in FIG. 5A, when the object to be inspected is the circuit board B and the lands B1 and B2, which are the measured portions, are on the same plane, the test probes P1 and P2 are operated by the operation tool 1. When pressed against the circuit board B, the contact portion C1 of the test probe P1 comes into contact with the land B1 and then the contact portion C2 of the test probe P2 comes into contact with the land B2, as shown in FIG. 5B.

  As described above with reference to FIG. 6, when operating the two test probes P1 and P2 while holding the chopsticks with one hand, for example, the land B1 and the land B2 are not on the same plane and have different heights. This means that the contact portions C1 and C2 can be surely brought into contact with the lands B1 and B2 even if the contact parts C1 and C2 are arranged in the above position or when the operation tool 1 itself is tilted and operated.

  As described above, according to the present invention, two test probes can be held and operated with one hand, and the opening angle of each test probe can be freely held at any position. Furthermore, by providing a plunger mechanism at the connecting part of each test probe, even if there is a step between the contacted parts, it absorbs the step and each test probe is always placed in a stable posture on the measured part. Can be contacted.

1 Operation Tool for Electrical Measurement of Test Probe 2 First Probe Holder 2a, 2b First Holder Member 21 First Insertion Hole 3 Second Probe Holder 3a, 3b Second Holder Member 31 Second Insertion Hole 4 Connecting Portion 40 Plunger Mechanism 41 Cylinder case 42 Cylinder 43 Compression coil spring 44 Slider 5 Coupling part P1 First test probe P2 Second test probe C1, C2 Contact part B Board B1, B2 Board land (measured part)

Claims (3)

An operation tool for electric measurement, which is used when performing electric measurement using two test probes , a pencil type first probe and a second test probe,
A cylindrical first probe holder having a first insertion hole into which the first test probe is detachably inserted, and a cylindrical second probe holder having a second insertion hole into which the second test probe is detachably inserted . A probe holder; and a connecting means for connecting the first probe holder and the second probe holder ,
The connecting means includes a first connecting portion provided on the first probe holder side, a second connecting portion provided on the second probe holder side, the first connecting portion and the second connecting portion. A connecting shaft to be inserted, the connecting shaft insertion hole on the side of the first connecting portion is an elongated hole formed along the axial direction of the first probe holder,
Said first probe holder and the second probe holder, rotatable in a direction in which the contact portions of each of the test probe close to or away about said connecting shaft and said first probe holder and the second probe An operation tool for electrical measurement of a test probe, wherein a holder is connected so as to be relatively slidable along the long axis direction of the long hole . A plunger mechanism having a compression coil spring housed in the cylinder and a slider biased by the compression coil spring is provided on the side of the first connecting portion, and the cylinder has the elongated hole in the cylinder shaft. The electrical measuring operation tool for a test probe according to claim 1 , wherein the operating shaft is formed along a direction, and the connecting shaft is connected to the slider through the elongated hole . The connecting shaft includes tightening means for generating a frictional force against rotation between the first connecting part and the second connecting part, and the first probe holder and the second probe holder are connected via the tightening means. DOO electric measuring operation tool of the test probe according to claim 1 or 2, characterized in that it is fixed in a state of maintaining a predetermined opening angle.

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