CN110646647B

CN110646647B - Measuring probe and measuring device

Info

Publication number: CN110646647B
Application number: CN201910523397.5A
Authority: CN
Inventors: 池田大辅
Original assignee: Hioki Denki KK
Current assignee: Hioki EE Corp
Priority date: 2018-06-27
Filing date: 2019-06-18
Publication date: 2023-02-03
Anticipated expiration: 2039-06-18
Also published as: CN110646647A; KR20200001490A

Abstract

The invention can accurately position the cover component on the clamping component at each position, and can prevent the increase of the manufacturing cost; the present invention is provided with a probe (2), a clamping member (3), cover members (4), (5), and positioning portions (6), (7), wherein the positioning portion has a protrusion (6) and a groove portion (7), the cover member has a first cover member (4) and a second cover member (5), the first cover member (4) is provided with a front end hole (41), the second cover member (5) is provided with a protrusion (6), and a dimension (T1) from a center line (X) to an inner side surface of the front end hole (41) is smaller than a dimension (T2) from the center line (X) to an inner side surface (60) of the protrusion (6); as a result, according to the present invention, the cover member can be accurately positioned on the clamping member at each position, and the increase in manufacturing cost can be prevented.

Description

Measuring probe and measuring device

Technical Field

The present invention relates to a measuring probe and a measuring apparatus having the measuring probe and measuring electrical characteristics.

Background

As a measuring probe, for example, there is a probe shown in patent document 1. The measurement probe of patent document 1 includes a probe, a clamping portion, a probe cover, and a positioning mechanism, and a tip end of the probe cover is provided with a tip end hole through which a tip end portion of the probe protrudes to the outside. In the measurement probe of patent document 1, the probe cover is positioned by the positioning mechanism on the holding portion at each of a first position where the probe is projected from the probe cover to the outside by a length of a first predetermined value, a second position where the probe is projected from the probe cover to the outside by a length of a second predetermined value smaller than the length of the first predetermined value, and a third position where the probe is accommodated in the probe cover without being projected from the probe cover to the outside.

The positioning mechanism in the measuring probe of patent document 1 includes a convex portion provided on an inner wall of a probe cover, a guide groove formed on a surface of a grip portion, and a first branch groove, a second branch groove, and a third branch groove. In the measurement probe of patent document 1, the convex portion is moved in the guide groove in the axial direction, and the convex portion is fitted into the first branch groove, the second branch groove, and the third branch groove, whereby the probe cover is positioned at each of the first position, the second position, and the third position on the clamping portion.

[ Prior art documents ]

[ patent literature ] A

Patent document 1: japanese unexamined patent publication No. 2011-191281

However, in the measurement probe of patent document 1, for example, as shown in fig. 9 (C), a tip hole 401 is provided at the tip of a probe cover 400, a protrusion 402 serving as a positioning means is provided on the inner wall of the probe cover 400, and a dimension T10 from an axis X to the inner wall of the tip hole 401 is smaller than a dimension T20 from the axis X to the inner wall of the protrusion 402. As a result, in the measuring probe of patent document 1, for example, as shown in fig. 10 (B), when the probe cover 400 is molded, the convex portion 402 is crushed as shown by a broken line in fig. 9 (C) when the

molds

403 and 404 are pulled out, and the convex portion 402 (the convex portion shown by a solid line in fig. 9 and 10 (B)) manufactured as designed may not be obtained. In this case, the probe cover may not be accurately positioned on the clamping portion at each position. This means that: the probe does not protrude from the probe cover to the outside by a length of the first predetermined value or a length of the second predetermined value.

Here, when a slide type mold is used as the mold, the convex portion 402 (convex portion shown by a solid line in fig. 9 (C) and fig. 10 (B)) manufactured as designed can be obtained, and the probe cover can be accurately positioned on the clamping portion at each position. However, when the slide mold is used, the mold design and the mold manufacturing become complicated, and the mold cost becomes high, and accordingly, the manufacturing cost becomes high.

Disclosure of Invention

The problem to be solved by the present invention is to provide: the cover member can be accurately positioned on the clamping member at each position, and the measuring head and the measuring device can be prevented from increasing the manufacturing cost.

The measuring probe according to the present invention has the following features.

The measuring probe of the present invention includes: a rod-shaped probe, a rod-shaped clamping member which covers and supports a rear end portion of the probe, a cylindrical cover member which covers a front end portion of the probe and a front end portion of the clamping member and is attached to the clamping member so as to be movable in a direction of a center line of the probe and the clamping member and rotatable about the center line, positioning portions which are provided on the clamping member and the cover member, respectively, and which position the cover member on the clamping member at respective positions of a first position at which the probe projects from the cover member to the outside by a length of a first predetermined value and a second position at which the probe projects from the cover member to the outside by a length of a second predetermined value smaller than the length of the first predetermined value; a positioning portion having: a protrusion provided on an inner side surface of the cover member or an outer side surface of the clamping member, a groove provided on an outer side surface of the clamping member or an inner side surface of the cover member, and the protrusion being engaged with the groove so as to be movable in a direction of the center line and rotatable about the center line; the cover member has a first cover member on the side of the front end portion and a second cover member on the side of the rear end portion, fitting portions which are fitted to each other to form the first cover member and the second cover member as a single body are provided on the first cover member and the second cover member, respectively, a front end hole through which the front end portion of the probe is projected to the outside is provided on the front end portion of the first cover member, and a projection or a groove portion is provided on the inner side surface of the second cover member, and the dimension from the center line to the inner side surface of the front end hole is smaller than the dimension from the center line to the inner side surface of the projection.

In the measuring probe of the present invention, it is preferable that: the front end side surface of the projection is perpendicular to the center line, and the rear end side surface of the projection is inclined from the inner side surface side of the projection to the inner side surface side of the second cover member or from the outer side surface side of the projection to the outer side surface side of the clamping member as going from the front end side to the rear end side.

The measuring probe of the present invention includes: a rod-shaped probe, a rod-shaped clamping member which covers and supports a rear end portion of the probe, a cylindrical cover member which covers a front end portion of the probe and a front end portion of the clamping member and is attached to the clamping member so as to be movable in a direction of a center line of the probe and the clamping member and rotatable about the center line, positioning portions which are provided on the clamping member and the cover member, respectively, and which position the cover member on the clamping member at respective positions of a first position at which the probe projects from the cover member to the outside by a length of a first predetermined value and a second position at which the probe projects from the cover member to the outside by a length of a second predetermined value smaller than the length of the first predetermined value; a positioning portion having: a protrusion provided on an outer side surface of the clamping member, a groove provided on an inner side surface of the cover member, the protrusion being engaged with the groove so as to be movable in a center line direction and rotatable about the center line; the cover member has a first cover member on the side of the front end portion and a second cover member on the side of the rear end portion, fitting portions which are fitted to each other to form the first cover member and the second cover member as a single body are provided on the first cover member and the second cover member, respectively, a front end hole through which the front end portion of the probe is projected to the outside is provided on the front end portion of the first cover member, a groove portion is provided on the inner side surface of the second cover member, and the dimension from the center line to the inner side surface of the front end hole is smaller than the dimension from the center line to the inner side surface of the projection.

The measuring probe of the present invention preferably includes: the front end side surface of the projection is perpendicular to the center line, and the rear end side surface of the projection is inclined from the outer side surface side of the projection to the outer side surface side of the clamping member as going from the front end side to the rear end side.

The measuring probe of the present invention includes: a rod-shaped probe, a rod-shaped clamping member which covers and supports a rear end portion of the probe, a cylindrical cover member which covers a front end portion of the probe and a front end portion of the clamping member and is attached to the clamping member so as to be movable in a direction of a center line of the probe and the clamping member and rotatable about the center line, positioning portions which are provided on the clamping member and the cover member, respectively, and which position the cover member on the clamping member at respective positions of a first position at which the probe projects from the cover member to the outside by a length of a first predetermined value and a second position at which the probe projects from the cover member to the outside by a length of a second predetermined value smaller than the length of the first predetermined value; a positioning section having: a protrusion provided on an inner side surface of the cover member, a groove provided on an outer side surface of the clamping member, and the protrusion being engaged with the groove so as to be movable in a center line direction and rotatable around the center line; the cover member has a first cover member on the side of the front end portion and a second cover member on the side of the rear end portion, fitting portions which are fitted to each other to form the first cover member and the second cover member as a single body are provided on the first cover member and the second cover member, respectively, a front end hole through which the front end portion of the probe is projected to the outside is provided on the front end portion of the first cover member, a projection is provided on the inner side surface of the second cover member, and the dimension from the center line to the inner side surface of the front end hole is smaller than the dimension from the center line to the inner side surface of the projection.

In the measuring probe of the present invention, it is preferable that: the front end side surface of the projection is perpendicular to the center line, and the rear end side surface of the projection is inclined from the inner side surface side of the projection to the inner side surface side of the second cover member as going from the front end side to the rear end side.

The measuring probe of the present invention preferably includes: a groove portion having: and a first positioning groove portion and a second positioning groove portion which are provided around the center line from the movement groove portion, respectively, and in which the protrusion is engaged with the first positioning groove portion and the second positioning groove portion so as to be rotatable around the center line, whereby the cover member can be positioned at each position on the clamping member.

In the measuring probe of the present invention, it is preferable that: the locking surface for stopping rotation of the protrusion around the center line is provided on a wall surface of each of the first positioning groove portion and the second positioning groove portion, the wall surface being on the opposite side to the movement groove portion, out of the wall surfaces of the positioning groove portions, and the locking protrusion is provided on a bottom surface of each of the positioning groove portions, and when the protrusion abuts on the locking surface, the locking protrusion is locked on a surface of the protrusion on the opposite side to the surface abutting on the locking surface.

In the measuring probe of the present invention, it is preferable that: a first visual recognition display part for visually recognizing a first position and a second visual recognition display part for visually recognizing a second position are respectively arranged on the outer side surface of the clamping component.

The measuring probe of the present invention preferably includes: the positioning portion positions the cover member on the clamping member at each of a first position, a second position, and a third position, wherein the third position is a position where the probe is accommodated in the cover member without protruding from the cover member to the outside.

In the measuring probe of the present invention, it is preferable that: a groove portion having: and a first positioning groove portion, a second positioning groove portion, and a third positioning groove portion which are provided around the center line from the rear end, the middle, and the front end of the moving groove portion, respectively, wherein the cover member is positioned at each position on the holding member by engaging the protrusion rotatably around the center line with the first positioning groove portion, the second positioning groove portion, and the third positioning groove portion.

In the measuring probe of the present invention, it is preferable that: the locking surface for stopping rotation of the protrusion around the center line is provided on a wall surface of each of the first positioning groove portion, the second positioning groove portion, and the third positioning groove portion, the wall surface being on the opposite side to the movement groove portion, and the locking protrusion is provided on a bottom surface of each of the positioning groove portions, and when the protrusion abuts on the locking surface, the locking protrusion is locked on a surface of the protrusion on the opposite side to a surface of the protrusion abutting on the locking surface.

In the measuring probe of the present invention, it is preferable that: a first visual recognition display part for visually recognizing the first position, a second visual recognition display part for visually recognizing the second position and a third visual recognition display part for visually recognizing the third position are respectively arranged on the outer side surface of the clamping component.

The measuring device of the present invention is characterized by comprising: the measuring probe having the above-described configuration and the measuring apparatus main body execute electrical measurement processing via the measuring probe having the above-described configuration.

(effect of the invention)

According to the present invention, there can be provided: the cover member can be accurately positioned on the clamping member at each position, and the measuring head and the measuring device can be prevented from increasing the manufacturing cost.

Drawings

Fig. 1 is a partially enlarged perspective view showing a measurement probe according to an embodiment of the present invention, with a part broken away.

Fig. 2 is an explanatory view showing a measuring probe. Here, (a) is a front view (direction iia view in fig. 1) showing the measurement probe, (B) is a top view (direction iib view in fig. 1) showing the measurement probe, and (C) is a bottom view (direction iic view in fig. 1) showing the measurement probe.

Fig. 3 is an exploded perspective view showing main parts (probe, clamping member, first cover member, and second cover member).

Fig. 4 is an enlarged vertical cross-sectional view of a main portion showing a state in which the protrusion is fitted in the moving groove (an enlarged cross-sectional view taken along line iv-iv in fig. 2 (B)).

Fig. 5 is an enlarged longitudinal sectional view of a main part showing a state in which the cover member is positioned on the clamping member at each position (an enlarged sectional view taken along line v-v in fig. 2 (a)). Wherein (a) is an enlarged longitudinal cross-sectional view of a main part showing a state in which the cover member is positioned on the gripping member at the third position, (B) is an enlarged longitudinal cross-sectional view of a main part showing a state in which the cover member is positioned on the gripping member at the second position, and (C) is an enlarged longitudinal cross-sectional view of a main part showing a state in which the cover member is positioned on the gripping member at the first position.

Fig. 6 is a front view of a main part showing a state in which the cover member is positioned on the clamp member at each position. Here, (a) is a front view of a main portion showing a state in which the cover member is positioned on the clamping member at the third position, (B) is a front view of a main portion showing a state in which the cover member is positioned on the clamping member at the second position, and (C) is a front view of a main portion showing a state in which the cover member is positioned on the clamping member at the first position.

Fig. 7 is a cross-sectional explanatory view showing an operation of the positioning portion. Wherein (a) is a cross-sectional explanatory view showing a state where the protrusion is engaged with the movement groove portion (a cross-sectional explanatory view corresponding to (B) in fig. 7), (B) is a cross-sectional explanatory view showing a state where the protrusion is engaged with the movement groove portion connected to the third positioning groove portion (an enlarged cross-sectional view along line viib-viib in fig. 4), and (C) is a cross-sectional explanatory view showing a state where the protrusion is engaged with the third positioning groove portion (a cross-sectional explanatory view corresponding to (B) in fig. 7).

Fig. 8 is a development explanatory view showing an operation of the positioning portion. Wherein, (a) is an expanded explanatory view showing a state in which the protrusion is engaged with the third positioning groove portion, (B) is an expanded explanatory view showing a state in which the protrusion is engaged with the second positioning groove portion, and (C) is an expanded explanatory view showing a state in which the protrusion is engaged with the first positioning groove portion.

Fig. 9 is an enlarged vertical cross-sectional view showing the cover member. The first cover member and the second cover member are formed separately from each other, the second cover member is formed integrally with the first cover member and the second cover member, and the cover member (probe cover for a measuring probe of patent document 1) is not used in the present invention.

Fig. 10 is a cross-sectional explanatory view showing a state in which the cover member is formed. In the above description, (a) is a cross-sectional explanatory view showing a state of a second cover member formed separately from a first cover member, and (B) is a cross-sectional explanatory view showing a state of a cover member (a probe cover of a measurement probe of patent document 1) not implementing the present invention.

Fig. 11 is a diagram showing the external appearance of a measuring apparatus main body and a measuring probe in the measuring apparatus.

(description of symbols)

Measuring probe for 1 …

2 … Probe

3 … clamping component

30 … inclined plane

31 … first visual recognition display unit

32 … second visual recognition display unit

33 … third visual recognition display unit

34 … first character display part

35 … second character display unit

36 … slot display part for movement

4 … first cover member (cover member)

40 … fitting convex part (fitting part)

41 … front end hole

42 … vertical wall

5 … second cover part (cover part)

50 … fitting recess (fitting part)

51 … Flange portion

52 … projection display part

53 … mould

54 … die

6 … projection (positioning part)

60 … medial surface

61 … front end side

62 … rear end side

7 … groove (positioning part)

Groove for 70 … movement

71 … groove for first positioning

72 … groove for second positioning

73 … groove for third positioning

74 … stop face

75 … locking convex part

8 … insulated wire (Cable conductor)

A … first predetermined value

B … second predetermined value

T1 … is the dimension from the center line X to the inner side surface of the front end hole 41

T2 … is a dimension from the center line X to the inner side surface 60 of the projection 6 as a positioning portion

X … centerline (Axis)

PL1 … parting line

10 … measuring device

100 … measuring device body

110 … casing

120 … operation part

130 … display part

400 … probe cover

401 … front end hole

402 … convex portion

403 … die

404 … die

T10 … is the dimension from the axis X to the inner wall of the front end hole 401

T20 … dimension from axis X to inner wall of projection 402

PL10 … parting line

Detailed Description

Hereinafter, an example of an embodiment (example) of a measurement probe (probe) according to the present invention will be described in detail with reference to the drawings.

(description of the constitution of the embodiment)

The structure of the measurement probe 1 according to the present embodiment will be described below. In this example, the "front end" indicates the left end of the drawing, and the "rear end" indicates the right end of the drawing.

(description of measuring tip 1)

As shown in fig. 1 and 2, the measurement probe 1 according to the present embodiment includes: the probe 2, the grip member 3 (grip), the

cover members

4, 5, the positioning portions 6, 7, and the insulated wire (signal cable) 8. The measuring probe 1 is used in pairs, and is a member constituting a measuring apparatus 10 (see fig. 11) described later. Here, the measuring apparatus 10 is configured to include: a pair of measuring

probes

1 and 1, and a measuring apparatus main body 100 (see fig. 11) for measuring an electrical characteristic of an object to be measured, the measuring apparatus main body 100 being connected to the measuring probes 1 and 1 via

insulated wires

8 and 8, respectively. The measuring probes 1 and 1 in fig. 11 are in a state in which the probe 2 (not shown) is accommodated in the

cover members

4 and 5.

(Explanation of Probe 2)

The probe 2 is made of a conductive member such as brass having a surface plated with gold or nickel. As shown in fig. 1, 3 to 5, and 7, the probe 2 is formed in a circular rod shape in this example. The tip of the probe 2 is formed in a conical pointed shape so as to be easily brought into contact with the object to be measured. The rear end side (not shown) of the probe 2 is electrically connected to the insulated wire 8 in the clamping member 3.

(description of holding Member 3)

The holding member 3 is made of an insulating member such as polyvinyl chloride resin. As shown in fig. 1 to 7, the gripping member 3 is formed in a circular rod shape or a cylindrical shape in this example. The holding member 3 fixes the probe 2 and the insulated wire 8 inside thereof. The holding member 3 covers the rear end portion of the probe 2 and is supported by, for example, screwing or bonding. Thereby, the center line X of the probe 2 and the center line X of the clamping member 3 are coaxial. Further, the tip portion of the probe 2 protrudes from the tip of the clamping member 3. The holding member 3 is preferably formed in red for the positive electrode and black for the negative electrode.

An outer surface of the distal end portion of the holding member 3, i.e., a flat surface (upper surface) in this example, is provided with an inclined surface 30 which is inclined upward from the distal end side toward the rear end side. On the outer side surface of the tip end portion of the gripping member 3, i.e., the plane and the front surface in this example, a groove portion 7 (guide) is provided as a positioning portion. The front end of the groove 7 is located at the rear end of the inclined surface 30. The distal end portion of the holding member 3 in this example is formed in a truncated cone shape whose diameter (outer diameter) gradually decreases toward the distal end.

(Explanation of cover Member 4, 5)

The

cover members

4 and 5 are made of an insulating material such as polypropylene. The color of the

cover members

4 and 5 may be the same as or different from the color of the clamp member 3. As shown in fig. 1 to 7, 9, and 10, the

cover members

4 and 5 are formed in a cylindrical shape in this example. The inner diameters of the

cover members

4, 5 are larger than the outer diameter of the probe 2 and the outer diameter of the gripping member 3. The tip of the probe 2 and the tip of the clamping member 3 are housed inside the

cover members

4 and 5. The

cover members

4 and 5 are attached to the gripping member 3 so as to be movable in the direction of the center line X of the probe 2 and the gripping member 3 and rotatable about the center line X.

The cover member includes a first cover member 4 (cap) on the front end portion side and a second cover member 5 (barrier) on the rear end portion side. The first cover member 4 includes a small-diameter front end portion, a medium-diameter middle portion, and a large-diameter rear end portion. A rear end hole having a circular cross section is provided in a rear end portion of the first cover member 4. The inner diameter of the rear end hole of the first cover member 4 is larger than the outer diameter of the front end portion of the second cover member 5. This allows the distal end portion of the second cover member 5 to be fitted into the rear end hole of the first cover member 4.

A fitting projection 40 is integrally provided in a ring shape on the inner surface of the rear end hole of the first cover member 4. A fitting recess 50 is annularly provided on an outer side surface of a distal end portion of the second cover member 5. The first cover member 4 and the second cover member 5, which are formed separately, are formed integrally by fitting the fitting projections 40 and the fitting recesses 50 to each other.

Here, the front end side surface of the fitting projection 40 is perpendicular to the center line X, and the rear end side surface of the fitting projection 40 is inclined from the inner side surface side of the fitting projection 40 to the inner side surface side of the first cover member 4 as going from the front end side to the rear end side. Thereby, the structure is as follows: the fitting convex portion 40 is easily fitted into the fitting concave portion 50, and the fitting convex portion 40 is not easily detached from the fitting concave portion 50. Alternatively, the first cover member 4 may be provided with a fitting recess, and the second cover member 5 may be provided with a fitting projection.

A tip end hole 41 having a circular cross section through which the tip end of the probe 2 protrudes to the outside is provided at the tip end portion of the first cover member 4. The first cover member 4 has a center hole in its center portion, which is fitted to the tip portion of the clamp member 3 from the outside. At the boundary of the front end hole 41 and the middle hole, a vertical wall 42 is provided which is perpendicular with respect to the center line X. The intermediate hole is formed in a truncated cone shape having an inner diameter gradually increasing from the front end side toward the rear end side. Thereby, the structure is as follows: the intermediate portion of the first cover member 4 is easily fitted to the tip portion of the clamping member 3 having a truncated cone shape from the outside.

The second cover member 5 is formed in a cylindrical shape having the same diameter. The second cover member 5 is provided with a fitting hole that is fitted into the holding member 3 from the outside. A circular flange 51 is integrally provided on the outer surface of the distal end portion of the second cover member 5. The fitting recess 50 is provided on the outer surface of the second cover member 5 on the distal end side of the flange portion 51. The outer surface of the second cover member 5 on the distal end side of the fitting recess 50 is inclined such that the outer diameter gradually decreases toward the distal end. That is, the fitting convex portion 40 is formed as a tapered surface so as to be easily fitted into the fitting concave portion 50. A projection 6 (protrusion) serving as a positioning portion is provided on the inner side surface of the intermediate portion of the second cover member 5.

The dimension T1 from the center line X to the inner surface of the distal end hole 41 in the first cover member 4 is smaller than the dimension T2 from the center line X to the inner surface 60 of the protrusion 6 as the positioning portion in the second cover member 5.

(explanation of positioning parts 6 and 7)

As shown in fig. 1 to 8, the positioning portion includes a protrusion 6 provided on the inner side surface of the second cover member 5 and a groove portion 7 provided on the outer side surface of the gripping member 3. The protrusion 6 is engaged with the groove 7 so as to be movable in the direction of the center line X and rotatable about the center line X.

The positioning portions 6, 7 position the

cover members

4, 5 on the gripping member 3 at respective positions of a first position (a position in a state shown in fig. 5 (C), 6 (C)), a second position (a position in a state shown in fig. 5 (B), 6 (B)), and a third position (a position in a state shown in fig. 5 (a), 6 (a)).

The first position is a position at which the probe 2 projects outward from the distal end hole 41 of the first cover member 4 by a length of the first predetermined value a. The second position is a position at which the probe 2 projects outward from the distal end hole 41 of the first cover member 4 by a length of a second predetermined value B shorter than the length of the first predetermined value a. The third position is a position where the probe 2 is accommodated in the

cover members

4 and 5 without protruding from the distal end hole 41 of the first cover member 4 to the outside.

The length of the predetermined value a is set to a length of 19 mm or less in accordance with CAT ii of the IEC61010 standard. The length of the predetermined value B is set to 4 mm or less in accordance with CAT iii, which is the same standard.

As shown in fig. 9 (a) and (B) and fig. 10 (a), the inner surface 60 of the protrusion 6 is parallel to the center line X. The front end side surface 61 of the projection 6 is perpendicular to the center line X. The rear end side surface 62 of the projection 6 is inclined from the inner surface 60 side of the projection 6 to the inner surface side of the second cover member 5 as going from the front end side to the rear end side.

As shown in fig. 1 to 8, the groove portion 7 includes a movement groove portion 70, a first positioning groove portion 71, a second positioning groove portion 72, and a third positioning groove portion 73. The wall surfaces of the positioning grooves 71, 72, 73 are perpendicular to the center line X. The movement groove portion 70 is provided on the plane of the holding member 3 along the center line X direction, and the protrusion 6 is fitted in the movement groove portion 70 so as to be movable along the center line direction. The first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73 are provided with: the

cover members

4 and 5 are positioned on the gripping member 3 at respective positions of the first position, the second position, and the third position by being provided around the center line X from the rear end, the middle, and the front end of the movement groove portion 70 in a range from the plane to the front of the gripping member 3, and by engaging the protrusion 6 with the first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73 so as to be rotatable around the center line X. The first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73 are provided perpendicularly to the moving groove portion 70.

(explanation of stopper surface 74 and locking projection 75)

As shown in fig. 7 and 8, of the wall surfaces of the positioning groove portions of the first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73, a stopper surface 74 that stops rotation of the protrusion 6 about the center line X is provided on the wall surface on the opposite side to the movement groove portion 70. The stop surface 74 is parallel to the centerline X.

As shown in fig. 7 and 8, locking convex portions 75 are provided on the bottom surfaces of the positioning groove portions 71, 72, and 73, and when the protrusion 6 abuts on the stopper surface 74, the locking convex portions 75 are locked on the surface of the protrusion 6 opposite to the surface abutting on the stopper surface 74. The locking protrusion 75 is formed as a small protrusion having a semicircular cross section parallel to the center line X.

(description of visual identification display part)

As shown in fig. 1 to 3 and 6, a first visual recognition display unit 31, a second visual recognition display unit 32, and a third visual recognition display unit 33 are provided on the outer side surface of the holding member 3. Each of the first visual recognition display unit 31, the second visual recognition display unit 32, and the third visual recognition display unit 33 is formed of a narrow groove provided in an outer surface of the holding member 3 in an annular shape or a partial annular shape around the center line X. In addition, each visual recognition display portion may be provided with a color different from that of the clamping member 3, for example, in addition to the groove.

The first visual recognition display unit 31 is provided at a position further toward the rear end side than the first positioning groove 71, and is capable of visually recognizing the first position of the

cover members

4 and 5. That is, when the

cover members

4 and 5 are located at the first position, the rear end of the second cover member 5 is located at the first visual recognition display unit 31.

As a result, the rear end of the second cover member 5 can be visually recognized as being positioned in the first visual recognition display unit 31, and the

cover members

4 and 5 can be visually recognized as being positioned in the first position.

The second visual recognition display unit 32 is provided at the same position as the first positioning groove 71, and visually recognizes the second position of the

cover members

4 and 5. That is, as shown in fig. 6 (B), when the

cover members

4 and 5 are located at the second position, the rear end of the second cover member 5 is located at the second visual recognition display unit 32.

As a result, the rear end of the second cover member 5 is visually observed to be positioned in the second visual recognition display unit 32, so that the

cover members

4 and 5 can be visually recognized to be positioned in the second position. Further, the third visual recognition display portion 33 is provided between the first positioning groove portion 71 and the second positioning groove portion 72, and visually recognizes the third position of the

cover members

4 and 5. That is, as shown in fig. 2 and 6 (a), when the

cover members

4 and 5 are at the third position, the rear end of the second cover member 5 is positioned at the third visual recognition display unit 33.

As a result, the rear end of the second cover member 5 is visually observed to be positioned in the third visual recognition display portion 33, so that the

cover members

4 and 5 can be visually recognized to be positioned in the third position.

(description of character display section)

As shown in fig. 2 (C), a first character display portion 34 and a second character display portion 35 are provided on the outer side surface of the holding member 3, respectively. The first character display unit 34 is provided adjacent to the rear end side of the first visual recognition display unit 31. The first character display unit 34 is a character of "CATII" in IEC61010 standard. The second character display unit 35 is provided adjacent to the rear end side of the second visual recognition display unit 32. The second character display unit 35 is a character of "CATIII" in IEC61010 standard.

The rear end of the second cover member 5 is adjacent to "CAT ii" of the first character display unit 34, and thus: the

cover members

4 and 5 are positioned at the first position, and the probe 2 is projected outward from the distal end hole 41 of the first cover member 4 by the length of the first predetermined value a.

Further, the rear end of the second cover member 5 is adjacent to "CAT iii" of the second character display unit 35, so that it can be visually recognized that: the

cover members

4 and 5 are positioned at the second position, and the probe 2 is projected outward from the distal end hole 41 of the first cover member 4 by the length of the second predetermined value B.

(groove display part for movement 36, projection display part 52)

As shown in fig. 1 and 2 (B), a movement groove display portion 36 is provided at a position extending from the movement groove 70 toward the rear end side in the direction of the center line X in the plane of the clamping member 3. The groove display section 36 for movement is formed of, for example, a lattice pattern of lines. The groove display portion 36 for movement may be provided with, for example, a line having a color different from that of the holding member 3, in addition to the line having the lattice pattern.

As shown in fig. 1 and 2 (B), a projection display portion 52 is provided at a position extending from the projection 6 toward the rear end side in the center line X direction at the rear end of the second cover member 5. The projection display 52 is, for example, a notch. In addition, the projection display portion 52 may be provided as a notch, for example, in a color different from that of the second cover member 5.

When the groove display portion 36 for movement of the gripping member 3 and the projection display portion 52 of the second cover member 5 are overlapped with each other in the direction of the center line X, the projection 6 of the second cover member 5 is positioned in the groove 70 for movement of the gripping member 3.

As a result, the state in which the groove display portion for movement 36 and the protrusion display portion 52 overlap in the center line X direction is visually observed, and it can be visually recognized that the protrusion 6 is located in the groove portion for movement 70.

(explanation of the manufacturing Process of the measuring Probe 1)

Hereinafter, a manufacturing process of the measuring probe 1 will be described.

First, the probe 2 and the holding member 3 are manufactured by insert molding (insert molding). On the other hand, the first cover member 4 and the second cover member 5 are formed separately.

As shown in fig. 10 (a), the second cover member 5 is formed by

molds

53 and 54. The

molds

53 and 54 are separated from each other with a corner portion between the inner surface 60 and the rear end surface 62 of the protrusion 6 as a parting line PL 1. As a result, when the dies 53 and 54 are pulled out, the projection 6 (the projection 6 including the inner surface 60, the front end side surface 61, and the rear end side surface 62) can be manufactured as designed without crushing or the like of the projection 6.

Next, as shown in fig. 9 (a) and (B), the fitting convex portion 40 of the first cover member 4 and the fitting concave portion 50 of the second cover member 5, which are separately formed, are fitted to each other, thereby integrating the first cover member 4 and the second cover member 5 into a single body.

Then, the

cover members

4 and 5 are fitted to the distal end portion of the probe 2 and the distal end portion of the holding member 3 from the outside. That is, the inner surface 60 of the protrusion 6 of the second cover member 5 is slid along the inclined surface 30 of the holding member 3, so that the protrusion 6 is engaged with the distal end side of the movement groove portion 70. At this time, since the inclined surface 30 of the gripping member 3 is an inclined surface that is inclined upward from the front end toward the rear end, and the rear end side surface 62 of the protrusion 6 of the second cover member 5 is inclined as described above, the protrusion 6 can be easily and reliably engaged with the movement groove portion 70 by sliding the protrusion 6. Further, since the distal end side surface 61 of the projection 6 of the second cover member 5 is formed as a vertical surface as described above, the projection 6 is less likely to fall off from the movement groove portion 70 after the projection 6 is fitted in the movement groove portion 70. In this manner, the measurement probe 1 is assembled, and the manufacturing process of the measurement probe 1 is completed.

(description of the operation of the embodiments)

The measurement probe 1 according to the present embodiment has the above-described configuration. The operation of the measurement probe 1 according to the present embodiment will be described below.

First, a normal state will be explained.

In the normal state, as shown in fig. 1, 2, 4, 5 (a) and 6 (a), the

cover members

4 and 5 are located at the third position, and the probe 2 is accommodated in the

cover members

4 and 5 without protruding from the distal end hole 41 of the first cover member 4 to the outside, and is protected by the

cover members

4 and 5.

At this time, as shown by the solid lines in fig. 7 (C) and 8 (a), the protrusion 6 of the cover member 5 is positioned between the locking surface 74 and the locking protrusion 75 of the third positioning groove 73 of the clip member 3. As a result, the state of the third position of the

cover members

4 and 5 is maintained.

As shown in fig. 1, 2, and 6 (a), the rear end of the second cover member 5 is positioned at the third visual recognition display unit 33. As a result, it can be visually recognized that the

cover members

4 and 5 are in the third position.

Second, an operation of changing from the normal state to a state in which the probe 2 is projected to the outside from the distal end hole 41 of the first cover member 4 by the length of the second predetermined value B (a state of the length of the second predetermined value B), or a state in which the probe 2 is projected to the outside from the distal end hole 41 of the first cover member 4 by the length of the first predetermined value a (a state of the length of the first predetermined value a) will be described.

When this operation is performed, the finger tip is brought into contact with the flange portion 51 of the cover member 5.

First, the

cover members

4 and 5 located at the third position are rotated about the center line X with respect to the gripping member 3, and the protrusion 6 (the protrusion 6 shown by a solid line in fig. 8 a) located between the stopper surface 74 of the third positioning groove 73 and the locking protrusion 75 is located at the tip of the movement groove 70 (see a two-dot chain line in fig. 8 a).

At this time, the projection display portion 52 of the second cover member 5 and the groove display portion 36 for movement of the holding member 3 overlap each other in the direction of the center line X (see fig. 1 and 2B). As a result, it can be visually recognized that the protrusion 6 is positioned in the groove 70 for movement. That is, the

cover members

4 and 5 can be visually recognized to be movable in the direction of the center line X relative to the clamping member 3.

Next, the

cover members

4 and 5 positioned at the third position are moved from the front end side toward the rear end side in the direction of the center line X with respect to the gripping member 3, whereby the protrusion 6 (the protrusion 6 shown by the two-dot chain line in fig. 8 (a)) positioned at the front end of the movement groove portion 70 is positioned at the middle of the movement groove portion 70 (see the protrusion 6 shown by the two-dot chain line in fig. 8 (B)) or the rear end of the movement groove portion 70 (see the protrusion 6 shown by the two-dot chain line in fig. 8 (C)).

At this time, the rear end of the second cover member 5 is positioned at the second visual recognition display portion 32 or the first visual recognition display portion 31. As a result, the

cover members

4 and 5 can be visually recognized as being in the second position or the first position. The rear end of the second cover member 5 is adjacent to "CAT iii" of the second character display portion 35 or "CAT ii" of the first character display portion 34. As a result, it is possible to visually recognize: the

cover members

4 and 5 are positioned at the second position or the first position, and the probe 2 is projected to the outside from the distal end hole 41 of the first cover member 4 by the length of the second predetermined value B or the length of the first predetermined value a.

Then, the

cover members

4 and 5 positioned at the second position or the first position are rotated about the center line X with respect to the holding member 3, and the protrusion 6 positioned at the middle or rear end of the movement groove portion 70 (the protrusion 6 shown by the two-dot chain line in fig. 8 (B) or (C)) is positioned between the locking surface 74 and the locking protrusion 75 of the second positioning groove portion 72 or the first positioning groove portion 71 (see the solid line in fig. 8 (B) or (C)).

At this time, when the protrusion 6 passes over the locking protrusion 75, a Feeling of moderation (fealing of modulation) can be obtained. From this feeling of adequacy, it can be recognized that the protrusion 6 is positioned between the locking surface 74 and the locking convex portion 75 of the second positioning groove portion 72 or the first positioning groove portion 71. Further, since the projection 6 abuts against the stopper surface 74, the rotation of the

cover members

4 and 5 relative to the clamp member 3 about the center line X can be restricted.

When the

cover members

4 and 5 are located at the second position in this manner, the probe 2 projects from the distal end hole 41 of the first cover member 4 to the outside by the length of the second predetermined value B, as shown in fig. 5 (B) and 6 (B). When the

cover members

4 and 5 are in the first position, the probe 2 projects from the distal end hole 41 of the first cover member 4 to the outside by the length of the first predetermined value a, as shown in fig. 5 (C) and 6 (C). At this time, the front end surface of the holding member 3 abuts against the vertical wall 42 of the first cover member 4.

The operation of changing from the state of the second predetermined value B length to the normal state or the state of the first predetermined value a length, or the operation of changing from the state of the first predetermined value a length to the normal state or the state of the second predetermined value B length is substantially the same as the above-described operation of changing from the normal state to the state of the second predetermined value B length or the state of the first predetermined value a length, and therefore, the description thereof is omitted.

(description of the effects of the embodiment)

The measurement probe 1 according to the present embodiment has the above-described configuration and functions. Hereinafter, the effects of the measuring probe 1 according to the present embodiment will be described.

In the measuring probe 1 according to the present embodiment, since the cover members are divided into the first cover member 4 having the distal end hole 41 and the second cover member 5 having the projection 6, the first cover member 4 and the second cover member 5 can be formed separately.

As a result, in the measuring probe 1 according to the present embodiment, even when the dimension T1 from the center line X to the inner surface of the distal end hole 41 in the first cover member 4 is smaller than the dimension T2 from the center line X to the inner surface 60 of the projection 6 as the positioning portion in the second cover member 5, the projection 6 manufactured as designed can be obtained. That is, by dividing the cover member into the first cover member 4 and the second cover member 5, no portion having a smaller size from the center line X to the inner surface of the fitting hole than the size T2 from the center line X to the inner surface 60 of the protrusion 6 is formed on the inner surface of the fitting hole of the second cover member 5. As a result, the second cover member 5 can be molded by the

molds

53 and 54 divided into two parts with the corner portions of the inner surface 60 and the rear end side surface 62 of the protrusion 6 as the parting line PL 1. Thus, when the dies 53 and 54 are pulled out, the projection 6 (the projection 6 including the inner surface 60, the front end side surface 61, and the rear end side surface 62) can be manufactured as designed without crushing or the like of the projection 6.

In the measuring probe 1 according to the present embodiment, since the projection 6 manufactured according to the design can be obtained, the

cover members

4 and 5 can be accurately positioned on the holding member 3 at each of the first position, the second position, and the third position. Further, in the measuring probe 1 according to the present embodiment, since the slide type mold is not used, but the

molds

53 and 54 divided into two parts are used, the mold design and the mold manufacturing become simple, the mold cost becomes low, and accordingly, the manufacturing cost can be reduced.

Here, a probe cover 400 not implementing the measuring probe of the present invention (the measuring probe of patent document 1) will be described with reference to fig. 9 (C) and 10 (B).

As shown in fig. 9 (C), the probe cover 400 is not divided into two parts like the first cover member 4 and the second cover member 5 of the present invention, but is formed of one cover member. Further, in the probe cover 400, a tip hole 401 is provided at the tip, a protrusion 402 serving as a positioning means is provided on the inner wall of the probe cover 400, and a dimension T10 from the axis X to the inner wall of the tip hole 401 is smaller than a dimension T20 from the axis X to the inner wall of the protrusion 402.

As a result, in forming the probe cover 400, the

molds

53 and 54 divided into two parts, in which the corner of the protrusion 6 is the parting line PL1, according to the present invention cannot be used, and as shown in fig. 10 (B), the

molds

403 and 404 divided into two parts, in which the rear end of the tip hole 401 is the parting line PL10, are used. Thus, when the

molds

403 and 404 are pulled out, the convex portion 402 may not be obtained as designed (convex portion shown by a solid line in fig. 9 (C) and 10 (B)) due to, for example, the die 403 being crushed as shown by a broken line in fig. 9 (C). In this case, the probe cover 400 may not be accurately positioned on the clamping portion (not shown) at each position. This means that: the probe (not shown) does not protrude outward from the probe cover 400 by the length of the first predetermined value or the length of the second predetermined value.

In addition, in the molding of the probe cover 400, when a slide mold is used instead of the two-

part molds

403 and 404 shown in fig. 10 (B), the convex portion 402 (the convex portion shown by the solid line in fig. 9 (C) and 10 (B)) manufactured according to the design can be obtained, and the probe cover 400 can be accurately positioned on the clamping portion at each position. However, when a slide mold is used, the mold design and the mold manufacturing become complicated, the mold cost becomes high, and accordingly, the manufacturing cost becomes high.

In contrast, in the measuring probe 1 according to the present embodiment, since the projection 6 manufactured according to the design can be obtained, the

cover members

molds

In the measuring probe 1 according to the present embodiment, the distal end side surface 61 of the projection 6 is perpendicular to the center line X, and therefore, the distal end side surface 61 of the projection 6 and the wall surface of the groove portion 7 perpendicular to the center line X can be reliably brought into surface contact with each other. That is, in the measuring probe 1 according to the present embodiment, the distal end side surface 61 of the protrusion 6 and the wall surface on the distal end side of each of the first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73 can be brought into surface contact with each other reliably. Thus, in the measuring probe 1 according to the present embodiment, the

cover members

4 and 5 can be more accurately and reliably positioned on the holding member 3 at each of the first position, the second position, and the third position.

In the measuring probe 1 according to the present embodiment, the rear end side surface 62 of the projection 6 is inclined from the inner side surface 60 of the projection 6 to the inner side surface of the second cover member 5 as going from the front end side to the rear end side, and therefore, the projection 6 of the cover member 5 can be simply and reliably engaged with the movement groove portion 70 by sliding the projection 6 along the inclined surface 30 of the grip member 3. In the measurement probe 1 according to the present embodiment, the distal end side surface 61 of the projection 6 is perpendicular to the center line X, and therefore, when the projection 6 is fitted in the movement groove portion 70, the projection 6 is less likely to fall off from the movement groove portion 70.

In the measuring probe 1 according to the present embodiment, the movement groove portion 70 is provided along the center line X direction on the outer side surface of the clamping member 3, and the first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73 are provided around the center line X from the rear end, the middle, and the front end of the movement groove portion 70, respectively. As a result, in the measuring probe 1 according to the present embodiment, the projection 6 provided on the inner surface of the cover member 5 can be engaged with the movement groove portion 70 so as to be movable in the direction of the center line X, and can be engaged with the first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73 so as to be rotatable about the center line X. Thus, in the measuring probe 1 according to the present embodiment, the

cover members

4 and 5 can be positioned on the holding member 3 at the first position, the second position, and the third position.

In the measuring probe 1 according to the present embodiment, the first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73 are provided with the stopper surface 74 and the locking protrusion 75, respectively. As a result, in the measuring probe 1 according to the present embodiment, the state of the

cover members

4 and 5 at each of the first position, the second position, and the third position can be maintained by sandwiching the projection 6 between the stopper surface 74 and the locking projection 75.

In the measuring probe 1 according to the present embodiment, the locking convex portions 75 are provided in the first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73, respectively. As a result, in the measuring probe 1 according to the present embodiment, a feeling of moderation can be obtained when the protrusion 6 passes over the locking convex portion 75, and it can be recognized from the feeling of moderation which positioning groove portion of the first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73 the protrusion 6 is located between the locking surface 74 and the locking convex portion 75.

In the measuring probe 1 according to the present embodiment, the first visual recognition display unit 31, the second visual recognition display unit 32, and the third visual recognition display unit 33 are provided on the clamping member 3, respectively. As a result, in the measuring probe 1 according to the present embodiment, the state in which the rear end of the second cover member 5 is positioned in the first visual recognition display unit 31, the second visual recognition display unit 32, and the third visual recognition display unit 33 can be visually recognized as the position in which the

cover members

4 and 5 are positioned among the first position, the second position, and the third position.

In the measuring probe 1 according to the present embodiment, the clamping member 3 is provided with "CAT ii" in the first character display unit 34 and "CAT iii" in the second character display unit 35. As a result, in the measuring probe 1 according to the present embodiment, by visually observing the state in which the rear end of the second cover member 5 is adjacent to "CAT ii" of the first character display unit 34 and "CAT iii" of the second character display unit 35, it is possible to visually recognize: the

cover members

4 and 5 are positioned at the first position or the second position, and the probe 2 is projected to the outside from the distal end hole 41 of the first cover member 4 by the length of the first predetermined value a or the length of the second predetermined value B.

Further, in the measuring probe 1 according to the present embodiment, the groove portion display portion 36 for movement is provided in the grip member 3, and the protrusion display portion 52 is provided in the second cover member 5. As a result, in the measuring probe 1 according to the present embodiment, the state in which the projection 6 is located in the movement groove portion 70 can be visually recognized by visually observing the state in which the projection display portion 52 of the second cover member 5 and the movement groove portion display portion 36 of the sandwiching member 3 overlap each other in the center line X direction. That is, the

cover members

4 and 5 can be visually recognized to be movable in the direction of the center line X with respect to the clamping member 3. In the measuring probe 1 according to the present embodiment, the holder member 3 formed by insert-molding the probe 2 and the first cover member 4 and the second cover member 5 formed separately and integrated are integrally assembled. As a result, in the measuring probe 1 according to the present embodiment, there is no risk that the components such as the probe 2, the gripping member 3, the first cover member 4, and the second cover member 5 will be lost. In the measuring probe 1 according to the present embodiment, the fitting convex portion 40 is provided in the first cover member 4, and the fitting concave portion 50 is provided in the second cover member 5. As a result, in the measuring probe 1 according to the present embodiment, the first cover member 4 and the second cover member 5 can be easily assembled, and the first cover member 4 and the second cover member 5 after assembly are less likely to be detached.

In the measuring probe 1 according to the present embodiment, the inclined surface 30 and the groove portion 7 as the positioning portion are provided in the sandwiching member 3, and the protrusion 6 as the positioning portion is provided in the second cover member 5. As a result, in the measuring probe 1 according to the present embodiment, the second cover member 5 integrated with the first cover member 4 can be easily attached to the holding member 3 integrated with the probe 2, and the holding member 3 and the second cover member 5 after the attachment are less likely to be detached.

(description of examples other than the embodiment)

In the above embodiment, the movement groove portion 70 and the first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73 are perpendicular to each other. However, in the present invention, the following configuration may be adopted: the movement groove portion 70, the first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73 are not perpendicular to each other, but obliquely intersect each other. In the above embodiment, the second character display unit 35 is described as "CAT iii" in IEC61010 standard. However, in the present invention, the second character display unit 35 may be written as "CAT iii, iv" in IEC61010 standard.

Further, in the above embodiment, the cover members (the first cover member 4 and the second cover member 5) are respectively positioned on the clamping member 3 at the respective first position, the second position, and the third position by the positioning portions (the protrusions 6 and the groove portions 7). However, in the present invention, the cover members (the first cover member 4 and the second cover member 5) may be positioned on the holding member 3 at the respective first and second positions.

Further, in the above embodiment, the projection 6 as the positioning portion is provided on the inner side surface of the second cover member 5 as the cover member, and the groove portions 7 (the movement groove portion 70, the first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73) as the positioning portion are provided on the outer side surface of the sandwiching member.

However, in the present invention, the following configuration may be adopted: the protrusion 6 as a positioning portion is provided on the outer side surface of the gripping member 3, and the groove portion 7 (the movement groove portion 70, the first positioning groove portion 71, the second positioning groove portion 72, and the third positioning groove portion 73) as a positioning portion is provided on the inner side surface of the second cover member 5 as a cover member. In this case, it is preferable that: the rear end side surface of the projection 6 is inclined from the outer side surface side of the projection 6 to the outer side surface side of the clamp member 3 as going from the front end side to the rear end side.

(description of measuring apparatus)

An example of a measuring apparatus (embodiment) according to the present invention will be described in detail below with reference to fig. 11.

A measuring device 10 shown in fig. 11 is a card-type digital multimeter as an example of a "measuring device", and includes a measuring device main body 100 and a pair of measuring probes 1, and is configured to be capable of measuring various electrical parameters such as a voltage value, a current value, and a resistance value.

In this case, the measuring apparatus main body 100 is an example of a "measuring apparatus main body", and includes a case 110 that houses a measuring circuit, not shown, an operation unit 120 and a display unit 130 that are arranged on one surface of the case 110 on the front surface side, and the measuring apparatus main body 100 is configured to be capable of performing electrical measurement processing via the two measuring

probes

1, 1.

The details of the structure of the measuring probe 1 are already described in the description of the measuring probe 1, and therefore, the detailed description of the measuring probe 1 is omitted here. The present invention is not limited to the above embodiments.

Claims

1. A measuring head for measurement is characterized in that,

the disclosed device is provided with:

a probe in the form of a rod, which,

a rod-shaped holding member that covers and supports a rear end portion of the probe,

a cylindrical cover member that covers a distal end portion of the probe and a distal end portion of the clamping member, and is attached to the clamping member so as to be movable in a direction of a center line of the probe and the clamping member and rotatable around the center line,

positioning portions that are provided on the clamp member and the cover member, respectively, and that position the cover member on the clamp member at each of a first position at which the probe pin protrudes to the outside from the cover member by a length of a first predetermined value and a second position at which the probe pin protrudes to the outside from the cover member by a length of a second predetermined value that is smaller than the length of the first predetermined value;

the positioning part includes:

a protrusion provided on an outer side surface of the clamp member,

a groove portion provided on an inner surface of the cover member, the protrusion being engaged with the groove portion so as to be movable in the center line direction and rotatable about the center line;

the cover member has a first cover member on a front end portion side and a second cover member on a rear end portion side,

fitting portions are provided on the first cover member and the second cover member, respectively, and the fitting portions are fitted to each other to integrally form the first cover member and the second cover member of the single body,

a tip hole through which a tip portion of the probe is projected to the outside is provided in a tip portion of the first cover member,

the groove portion is provided on the inner side surface of the second cover member,

the dimension from the center line to the inner side surface of the tip hole is smaller than the dimension from the center line to the outer side surface of the protrusion.

2. A measuring probe according to claim 1,

the front end side surface of the projection is perpendicular with respect to the center line,

the rear end side surface of the projection is inclined from the outer side surface side of the projection to the outer side surface side of the clamping member as going from the front end side to the rear end side.

3. A measuring head for measurement is characterized in that,

the disclosed device is provided with:

a probe in the form of a rod, which,

the positioning part includes:

a projection provided on an inner surface of the cover member,

a groove portion provided on an outer side surface of the clamping member, the protrusion being engaged with the groove portion so as to be movable in the center line direction and rotatable about the center line;

fitting portions are provided on the first cover member and the second cover member, respectively, and the fitting portions are fitted to each other to integrate the first cover member and the second cover member of the single body,

the projection is provided on the inner surface of the second cover member,

the dimension from the center line to the inner surface of the tip hole is smaller than the dimension from the center line to the inner surface of the protrusion.

4. A measuring probe according to claim 3,

the front end side of the projection is perpendicular to the center line,

the rear end side surface of the projection is inclined from the inner side surface side of the projection to the inner side surface side of the second cover member as going from the front end side to the rear end side.

5. A measuring probe according to claim 1 or 3,

the groove portion has:

a groove for movement provided along the center line direction, the protrusion being fitted in the groove for movement so as to be movable along the center line direction,

and a first positioning groove portion and a second positioning groove portion which are provided around the center line from the moving groove portion, respectively, and in which the cover member can be positioned at each of the positions by engaging the protrusion with the first positioning groove portion and the second positioning groove portion so as to be rotatable around the center line.

6. A measuring probe according to claim 5,

a stopper surface for stopping rotation of the protrusion around the center line is provided on a wall surface of each of the first positioning groove portion and the second positioning groove portion, the wall surface being on an opposite side to the movement groove portion,

a locking convex portion is provided on a bottom surface of each positioning groove portion, and when the protrusion portion abuts on the stopper surface, the locking convex portion is locked on a surface of the protrusion portion opposite to a surface abutting on the stopper surface.

7. A measuring probe according to claim 1 or 3,

and a first visual identification display part for visually identifying the first position and a second visual identification display part for visually identifying the second position are respectively arranged on the outer side surface of the clamping component.

8. A measuring probe according to claim 1 or 3,

the positioning unit positions the cover member on the clamping member at each of the first position, the second position, and a third position in which the probe pin is accommodated in the cover member without protruding from the cover member.

9. A measuring probe according to claim 8,

the groove portion has:

and a first positioning groove, a second positioning groove, and a third positioning groove provided around the center line from the rear end, the middle, and the front end of the movement groove, respectively, wherein the cover member is positioned at each of the positions by engaging the protrusion with the first positioning groove, the second positioning groove, and the third positioning groove so as to be rotatable around the center line.

10. A measuring probe according to claim 9,

a stopper surface for stopping rotation of the protrusion around the center line is provided on a wall surface of each of the first positioning groove portion, the second positioning groove portion, and the third positioning groove portion, the wall surface being on an opposite side to the movement groove portion,

11. A measuring probe according to claim 8,

and a first visual identification display part for visually identifying the first position, a second visual identification display part for visually identifying the second position and a third visual identification display part for visually identifying the third position are respectively arranged on the outer side surface of the clamping component.

12. A measuring device is characterized in that a measuring device is provided,

the disclosed device is provided with:

a measuring probe according to any one of claims 1 to 11, and

a measuring device main body that performs an electrical measurement process via the measuring probe.