JP6741483B2 - Operation tool for electrical measurement of test probe - Google Patents

Description

The present invention relates to a test probe electrical measurement operating 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 a test probe electric measurement operation tool.

As one of the electrical measurement methods, there is a method in which two test probes are connected to an electrical measurement device such as a tester to measure the electrical characteristics between two points of an inspection site to be measured. In this type of test probe, as described in Patent Document 1, a tip of a pen-shaped grip portion is provided with a metal contact portion (probe), 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 respectively with one hand, and place them on the part to be measured such as the terminal board of the switchboard. I try to contact them.

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. It would be convenient to be able to operate two test probes with one hand.

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 allows two test probes to be operated simultaneously with one hand.

In order to solve the above-mentioned problems, the invention according to claim 1 performs electrical measurement using two test probes, a first probe and a second test probe, each of which has a contact portion that abuts on a contacted portion. An operation tool for electrical measurement used at that time,
A first probe holder having a first probe holding hole for holding the first test probe and a second probe holder having a second probe holding hole for holding the second test probe; The second probe holder is connected via a connecting means so as to be rotatable in a direction in which the contact portions are separated or approaching each other ,
The connection means is a first connection continuously provided on opposite side portions of the first and second probe holders so as to overlap each other along an imaginary plane including each axis of the first and second probe holding holes. And a second connecting portion, one of the connecting portions is formed with an arcuate guide recess centered on a rotation axis orthogonal to the virtual plane, and the other one of the connecting portions is formed. The connecting portion is formed with a guide rib that fits in the guide recess in an arc shape having the same curvature as the guide recess and a circumferential length shorter than that of the guide recess,
A combination of the guide recess and the guide rib is used as a first rotation guide means, and is formed between the first connection portion and the second connection portion in an arc shape with the same curvature centering on the rotation axis. It is characterized in that a second rotation guide means composed of a combination of a convex curved surface and a concave curved surface, which relatively slide with the rotation of the first probe holder and the second probe holder, is further provided . ..

According to a second aspect of the present invention, in the first aspect, an urging means is provided between the first connecting portion and the second connecting portion for urging the contact portions in a direction in which the contact portions are separated from each other or approach each other. It is characterized by being provided .

According to a third aspect of the present invention, in the second aspect, the connecting means includes a nut provided on one of the first and second connecting portions on the rotation axis, and from the other of the connecting means to the nut. The probe holder comprises a combination with a male screw to be screwed, and by tightening the male screw or the nut against the spring biasing force between the first connecting portion and the second connecting portion. Is provided with a tightening means for generating a frictional force capable of maintaining the opening angle at a predetermined angle .

The invention according to claim 4 is an operation for electrical measurement used when performing electrical measurement using two first and second test probes each having a contact portion that abuts on a contacted portion at each tip. An ingredient
A first probe holder having a first probe holding hole for holding the first test probe and a second probe holder having a second probe holding hole for holding the second test probe; The second probe holder is connected via a connecting means so as to be rotatable in a direction in which the contact portions are separated or approaching each other,
The connecting means is provided continuously with the first and second probe holders on opposite side portions thereof so as to overlap each other along an imaginary plane including each axis of the first and second probe holding holes. The first connecting portion and the second connecting portion have a second connecting portion and a connecting shaft that has an axis line orthogonal to the virtual plane and that rotatably connects the first and second connecting portions. An urging means is provided between the contact portion and the contact portion for urging the contact portions so as to separate or approach each other.
The connecting shaft is composed of a combination of a nut provided on either one of the first and second connecting portions and a male screw screwed onto the nut from the other one, and tightens the male screw or the nut. As a result, a frictional force capable of holding each of the probe holders at a predetermined opening angle is generated between the first connecting portion and the second connecting portion against the spring biasing force .

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the contact portions of the first and second test probes are provided on the respective tip sides of the first probe holder and the second probe holder. It is characterized in that a stopper portion is provided which defines the minimum interval in which the contacts do not come into contact with each other to cause a short circuit .

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the first probe holder and the second probe holder both have a cylindrical body having the probe holding hole inside along an axis thereof. And a pair of half-divided tubular members divided into two parts, wherein one side of each half-divided tubular member is hinge-connected and the other side is provided with a detachable cap means. It has a feature.

The invention according to claim 7, Oite to any one of claims 1 to 6, the distal end of the first probe holder and the second probe holder, respectively, provided on the test probes It is characterized in that a locking portion for locking the existing collar portion is provided .

According to the present invention, two test probes can be easily operated with one hand by mounting the test probes on the first probe holder and the second probe holder that are rotatably connected via the connecting means. be able to.

1A is a perspective view and FIG. 1B is a perspective view of a test probe showing a usage state of a test probe electrical measurement operating tool according to an embodiment of the present invention. The (a) front view, the (b) rear view, the (c) plan view, and the (d) bottom view of the operation tool for electrical measurement. (A) Left side view and (b) right side view of the above-mentioned electrical measurement operating tool. FIG. 2D is a sectional view taken along the line AA of FIG. The perspective view which shows the state which opened the cover member of the said electrical measurement operation tool. The partial cross section figure which shows the internal structure of the connection means of the said electrical measurement operation tool. (A) The exploded perspective view of the plane view side and (b) The exploded perspective view of the bottom view side which show the internal structure of the above-mentioned connecting means. (A) The perspective view which shows the state which made the test probe the minimum pitch, and (b) the schematic diagram which expanded the stopper part.

Next, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

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

As shown in FIG. 1(b), the test probes P1 and P2 used in this embodiment have pencil-type grip portions G1 and G2 whose outer diameters gradually decrease from the front end side toward the rear end side. Contact portions (also referred to as probe tips) C1 and C2 are provided at the tip thereof.

Further, 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. Connector terminals J1 and J2 (banana type plugs in this embodiment) are attached to the lead wires L1 and L2.

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

In addition, 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, the contact portions C1 and C2, and the grip portions G1 and G2 also need to be distinguished. In the case where there is not, similarly, the collar portion F, the contact portion C, and the grip portion G are collectively referred to.

With reference to FIG. 2 and FIGS. 3 and 5 together, this electrical measurement operation tool 1 holds a first probe holder 2 that holds one first test probe P1 and another second test probe P2. And a second probe holder 3 which is rotatably connected via a connecting means 4. The housing of the electrical measuring operation tool 1 is made of insulating plastic.

The first probe holder 2 includes a pair of half-divided tubular members each having a shape in which a tubular body is approximately half-divided (divided into two) along the axis thereof. The member is the holder body 21, and the other half-split member is the lid member 22.

The holder main body 21 and the lid member 22 are openably and closably connected to each other on one side (a base end side of opening and closing) by a hinge mechanism, and a probe holding hole 23 is formed inside in a closed state. On the other side of the holder main body 21 and the lid member 22 that is opened and closed, a detachable mouthpiece means composed of a combination of an engaging projection 24a and an engaging receiving portion 24b having an engaging hole 241 as its counterpart ( Locking means) 24 is provided.

The test probe P1 is housed in the first probe holder 2 with the lid member 22 opened, and the lid member 22 is closed to engage the engagement protrusion 24a with the engagement hole 241 of the engagement receiving portion 24b. It is held in the probe holding hole 23 by being closed by the mouthpiece means 24.

In order to firmly hold the test probe P1, the tip-side opening 231 of the probe holding hole 23 is formed so as to substantially match the outer diameter near the base of the flange F1 of the grip G1. .. Preferably, the rear end side opening 232 of the probe holding hole 23 is also formed so as to substantially match the outer diameter of the rear end of the grip portion G1.

In addition, the tip of the holder body 21 is provided with a first locking portion 26 that locks a part of the flange portion F1 of the test probe P1. The first locking portion 26 is provided so as to project from the bottom of the tip of the holder body 21, and includes a first locking recess 261 that locks a part of the flange F1. The first locking recess 261 seals the axial displacement of the test probe P1 and positions the test probe P1 accurately.

One side of the lid member 22 (base end side of opening/closing) is rotatably (openable/closable) connected to the corresponding one side of the holder body 21 via a hinge mechanism. Unlike the present embodiment, with respect to the mouthpiece means 24, the engaging convex portion 24a may be on the lid member 22 side and the engaging receiving portion 24b may be on the holder body 21 side.

Regarding the hinge mechanism, in this embodiment, referring to FIG. 5 and FIG. 7A, at both ends on one side of the lid member 22, the end portions 233a of the rib walls 233 on the same side of the holder body 21 are also provided. , 233a, and cylindrical bearing portions 222, 222 are provided, and a hemispherical projection portion is provided on one of the facing surfaces of the respective bearing portions 222 and the end portion 233a, and a hemispherical recess portion (neither is shown) is coaxial on the other surface. It has a hinge mechanism. The hinge mechanism may be a thin hinge.

On the side surface (front surface in FIG. 2D) of the first probe holder 2, there is provided a first finger hook 25 to which a finger (usually a thumb or an index finger) can be hooked when gripping the operation tool 1 by hand. ing. The first finger hook 25 is formed so as to straddle both the side surface of the holder main body 21 and the side surface of the lid member 22, and has an uneven surface for preventing slippage.

Next, like the first probe holder 2, the second probe holder 3 also includes a pair of half-divided tubular members each having a shape in which a tubular body is roughly halved (divided into two) along the axis thereof. Then, for convenience of explanation, one half-split tubular member is the holder body 31, and the other half-split tubular member is the lid member 32.

One side of the holder body 31 and the lid member 32 (base end side of opening and closing) is openably and closably connected by a hinge mechanism, and a probe holding hole 33 is formed inside in a closed state. The hinge mechanism may be the same as the hinge mechanism applied to the first probe holder 2.

With reference to FIG. 2C, on the other side of the holder body 31 and the lid member 32 that are opened and closed, an engagement projection 33a and an engagement receiving portion 33b having an engagement hole 341 as its counterpart. A detachable base means 34 composed of a combination of the above is provided.

The test probe P2 is housed in the second probe holder 3 with the lid member 32 opened, and the lid member 32 is closed to engage the engagement protrusion 33a with the engagement hole 341 of the engagement receiving portion 33b. It is held in the probe holding hole 33 by being closed by the mouthpiece means 34.

In order to firmly hold the test probe P2, the tip side opening 331 of the probe holding hole 33 is formed so as to substantially match the outer diameter in the vicinity of the base of the flange F2 of the grip G2. .. Preferably, the rear end side opening 332 of the probe holding hole 33 is also formed so as to substantially match the outer diameter of the rear end of the grip portion G2.

Further, the holder body 31 is provided at its tip with a second locking portion 36 with which a part of the flange portion F2 of the test probe P2 is locked. The second locking portion 36 is provided with a second locking recess 361 that is provided so as to project from the bottom of the tip of the holder body 31 and that locks part of the flange F2. The second locking recess 361 seals the axial displacement of the test probe P2, and positions the test probe P2 accurately.

The lid member 32 may have the same configuration as the lid member 22 on the first probe holder 2 side. Further, as shown in FIG. 2(c), a finger (usually a thumb or an index finger) is provided on the side surface of the second probe holder 3 when gripping the operating tool 1 with a hand, like the first probe holder 2. A second finger hook 35 is provided for hanging the. The second finger hooking portion 35 is formed so as to extend over both the side surface of the holder body 31 and the side surface of the lid member 32, and has an uneven surface for preventing slippage.

Next, with reference to FIG. 4, FIG. 6 and FIG. 7 together, the configuration of the connecting means 4 for connecting the first probe holder 2 and the second probe holder 3 will be described.

The connecting means 4 has, as a basic configuration, a bearing case 41 as a first connecting portion provided on a side surface of the first probe holder 2 side facing the second probe holder 3, and a first connecting case 4 on the second probe holder 3 side. 1 probe holder 2 and a connecting plate 42 as a second connecting portion provided on the side surface facing each other.

Two first and second rotation guide means are provided between the bearing case 41 and the connecting plate 42, and a frictional force is generated between the bearing case 41 and the connecting plate 42 between them. A tightening screw 43 is provided as a tightening means for holding the first probe holder 2 and the second probe holder 3 at a predetermined opening angle.

In this embodiment, the bearing case 41 is formed of a box-shaped frame integrally formed with the holder main body 21 of the first probe holder 2, and female screw holes for screwing the case cover 410 are screwed at two positions inside thereof. Bosses 411 and 411 are provided.

An opening 44 for inserting the connecting plate 42 into the bearing case 41 is provided on a side surface (a surface facing the second probe holder 3) of the bearing case 41. The case cover 410 is provided with a hexagonal nut 451 into which the tightening screw 43 is screwed, and the bearing case 41 is provided with a screw insertion hole 412 into which the tightening screw 43 is inserted.

The connecting plate 42 is integrally formed with the holder main body 31 of the second probe holder 3, and a screw insertion hole 421 through which the tightening screw 43 is inserted is provided in the central portion thereof. The screw insertion holes 412 and 421 and the hexagon nut 451 are arranged on the rotation axis Y (see FIG. 4) that is the rotation base point of the first probe holder 2 and the second probe holder 3.

In this embodiment, an arcuate guide hole 424 centered on the rotation axis Y is formed as one component of the first rotation guide means on the connecting plate 42 side, and the bearing case 41 is also formed. On the side, a guide rib 414 is formed as the other component of the first rotation guide means.

The guide rib 414 is fitted in the guide hole 424 in an arc shape having the same curvature as the guide hole 424 and a circumferential length shorter than that of the guide hole 424. The first probe holder 2 and the second probe holder 3 rotate within the guide hole 424 within a range in which the guide rib 414 can move. The guide hole 424 may be a groove.

Further, on the peripheral edge of the connecting plate 42, an arcuate convex curved surface 425 centering on the rotation axis Y is formed as one component of the second rotation guide means. On the other hand, on the bearing case 41 side, a partition portion 415 having a concave curved surface 416 as the other component of the second rotation guide means is provided.

The concave curved surface 416 is formed in an arc shape having the same curvature as the convex curved surface 425, and the concave curved surface 416 and the convex curved surface 425 relatively slide with the rotation of the first probe holder 2 and the second probe holder 3. To do.

A cylindrical sleeve portion 422 is coaxially formed around the screw insertion hole 421 on one surface (the lower surface in FIG. 4 and the upper surface in FIG. 7B) of the connecting plate 42, and the outer periphery thereof is formed. The coil portion 460 of the torsion spring 46 is fitted.

Further, on one surface of the connecting plate 42, a locking piece 423 for locking one end 461 of the torsion spring 46 is provided. The other end 462 of the torsion spring 46 is locked to the inner wall of the bearing case 41, so that the contact portions C1 and C2 of the test probes P1 and P2 are separated from each other via the probe holders 2 and 3. Be energized. Note that the probe holders 2 and 3 may be spring-biased in a direction in which they approach each other.

The tightening screw 43 is composed of a male screw shaft 432 having a knob portion 431 at the screw head, and is provided on the case cover 410 through the screw insertion hole 412 of the bearing case 41 and the screw insertion hole 421 of the connecting plate 42. It is screwed onto the nut 451.

In this embodiment, the tightening screw 43 is provided with another hexagonal nut 452, and as shown in FIG. 7B, a hexagonal hole 433 into which the hexagonal nut 452 is fitted is formed on the back side of the knob portion 431. It is provided.

According to this, by mounting the hexagon nut 452 on the proximal end side of the male screw shaft 432 and fitting the hexagon nut 452 into the hexagon hole 433, the knob portion 431 and the male screw shaft 432 are integrally rotated. You can Note that, instead of the hexagon nuts 451 and 452, for example, a square nut, a nut having a D cut portion, or the like may be used.

The first probe holder 2 and the second probe holder 3 are rotatable about the axis of the tightening screw 43, but by turning in the tightening direction of the tightening screw 43, the first probe holder 2 and the second probe holder 3 resist the biasing force of the torsion spring 46. The 1st probe holder 2 and the 2nd probe holder 3 can be hold|maintained at a predetermined opening angle.

That is, as shown in FIG. 4, by turning the knob portion 431 and tightening the tightening screw 43, the connecting plate 42 is pulled toward the bottom surface of the bearing case 41, and a frictional force against the turning force is generated.

Therefore, by tightening the tightening screw 43 so that the frictional force overcomes the spring biasing force of the torsion spring 46, the first probe holder 2 and the second probe holder 3 can be fixed while maintaining an arbitrary opening angle. it can.

As a modified example, in FIG. 4, the male screw shaft 432 is inverted and integrally fixed to the case cover 410 side, and the hexagonal nut 452 is left in the knob portion 431 in the state where it is fitted in the hexagonal hole 433. When the nut 452 is screwed onto the end of the male screw shaft 432, the hexagon nut 452 is turned together with the knob portion 431 to tighten the tightening screw 43, and the first probe holder 2 and the second probe holder 3 are opened at an arbitrary opening angle. It can be fixed while maintaining.

In the above embodiment, the probe holders 2 and 3 can be rotated by at least the first rotation guide means (the rotation guide means including the arc-shaped guide hole 424 and the arc-shaped guide rib 414 having the same curvature). Apart from this, the probe holders 2 and 3 may be rotatably connected by using the tightening screw 43 as a connecting screw for rotation.

Next, further referring to FIGS. 8A and 8B, when the minimum pitch is provided between the first probe holder 2 and the second probe holder 3, the contact portion C1 of the test probe P1 and the test portion P1 are tested. A stopper portion 5 is provided to prevent the contact portions C2 of the probe P2 from coming into contact with each other to prevent a short circuit.

The stopper portion 5 includes a first convex portion 51 provided on a tip side surface of the first probe holder 2 (an inner side surface facing the second probe holder 3) and a tip side surface of the second probe holder 3 ( The second probe 52 is provided on the inner side surface facing the first probe holder 2.

According to this, as shown in FIG. 7B, the first convex portion 51 and the second convex portion 52 are formed with the tip of the first probe holder 2 and the tip of the second probe holder 3 closest to each other. By abutting, the contact portion C1 of the test probe P1 and the contact portion C2 of the test probe P2 are held with a predetermined pitch, and as a result, the tips are prevented from contacting each other and short-circuiting. When the first convex portion 51 and the second convex portion 52 contact each other, the contact portions C1 and C2 have the minimum pitch.

As a modification of the stopper portion 5, a convex portion having a combined height of the first convex portion 51 and the second convex portion 52 may be provided only on one of the probe holder sides.

According to the present invention, by attaching the test probes P1 and P2 to the first probe holder 2 and the second probe holder 3 which are rotatably connected via the connecting means 4, two test probes are attached. It can be easily operated with one hand.

1 Operation Tool for Electrical Measurement of Test Probe 2 First Probe Holder 3 Second Probe Holder 21, 31 Holder Main Body 22, 32 Lid Member 23, 33 Probe Holding Hole 24, 34 Mouthpiece 26, 36 Locking Part 4 Connecting Means 41 Bearing case (first connecting part)
42 Connection plate (second connection part)
43 Tightening screw 5 Stopper part P Test probe C Contact part F Collar part

Claims (7)

An electrical measurement operation tool used when performing electrical measurement using first and second test probes each having a contact portion that abuts on a contacted portion at each tip,
A first probe holder having a first probe holding hole for holding the first test probe and a second probe holder having a second probe holding hole for holding the second test probe; The second probe holder is connected via a connecting means so as to be rotatable in a direction in which the contact portions are separated or approaching each other ,
The connection means is a first connection continuously provided on opposite side portions of the first and second probe holders so as to overlap each other along an imaginary plane including the axes of the first and second probe holding holes. And a second connecting portion, one of the connecting portions is formed with an arcuate guide recess centered on a rotation axis orthogonal to the virtual plane, and the other one of the connecting portions is formed. The connecting portion is formed with a guide rib that fits in the guide recess in an arc shape having the same curvature as the guide recess and a circumferential length shorter than that of the guide recess,
A combination of the guide recess and the guide rib is used as a first rotation guide means, and is formed between the first connection portion and the second connection portion in an arc shape with the same curvature centering on the rotation axis. It is characterized in that a second rotation guide means composed of a combination of a convex curved surface and a concave curved surface, which relatively slide with the rotation of the first probe holder and the second probe holder, is further provided. Operation tool for electrical measurement of test probe. The above between the first connection part and the second connecting portion, to claim 1, characterized in that biasing means for spring-loaded in the direction of one another away or close to the contact portions are provided An operation tool for electrical measurement of the described test probe. The connecting means is a combination of a nut provided on one of the first and second connecting portions on the rotation axis and a male screw screwed to the nut from the other, and By tightening the male screw or the nut, a frictional force capable of holding each probe holder at a predetermined opening angle is generated between the first connecting portion and the second connecting portion against the spring biasing force. The operation tool for electrical measurement of a test probe according to claim 2 , further comprising: tightening means. An electrical measurement operation tool used when performing electrical measurement using first and second test probes each having a contact portion that abuts on a contacted portion at each tip,
A first probe holder having a first probe holding hole for holding the first test probe and a second probe holder having a second probe holding hole for holding the second test probe; The second probe holder is connected via a connecting means so as to be rotatable in a direction in which the contact portions are separated or approaching each other,
The connecting means is provided continuously with the first and second probe holders on opposite side portions thereof so as to overlap each other along an imaginary plane including each axis of the first and second probe holding holes. The first connecting portion and the second connecting portion have a second connecting portion and a connecting shaft that has an axis line orthogonal to the virtual plane and that rotatably connects the first and second connecting portions. An urging means is provided between the contact portion and the contact portion for urging the contact portions so as to separate or approach each other .
The connecting shaft is composed of a combination of a nut provided on either one of the first and second connecting portions and a male screw screwed onto the nut from the other one, and tightens the male screw or the nut. the biasing, characterized in that the frictional force capable of retaining a predetermined opening angle each probe holder against the biasing force the spring between the first connecting portion and the second connecting portion is generated electrical measurement for operation tool of the test probe. A stopper portion is provided on each tip side of the first probe holder and the second probe holder, the stopper portion defining a minimum interval at which the contact portions of the first and second test probes do not come into contact with each other and short-circuit. The operation tool for electrical measurement of a test probe according to any one of claims 1 to 4 , which is characterized in that. Each of the first probe holder and the second probe holder includes a pair of half-divided tubular members obtained by dividing a tubular body having the probe holding hole therein into two along the axis thereof. The electrical connection of the test probe according to any one of claims 1 to 5 , wherein one side of the tubular member is hinge-connected, and the other side is provided with a detachable cap means. Measuring operation tool. The locking portion for locking the flange portion provided on the test probe is provided at each of the tip end portions of the first probe holder and the second probe holder. The operation tool for electrical measurement of the test probe according to any one of 6 above.

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