JP2015040709A - Measurement lead clip device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measurement lead clip device which can suppress a load to a sleeve to be generated due to difference in size of hands of measurers, and difference in size of clip devices themselves, and does not accelerate disconnection of cables.SOLUTION: In a measurement lead clip device 1 which has a pair of slender-shaped clip body parts 3 provided with tip metal fittings 2 at ends on one side, and from ends on the other side of which cables 20 connected to the tip metal fittings 2 are drawn outward, the pair of clip body parts 3 are oscillatably supported by a rotary support shaft 5, energized at a first position where the tip metal fittings 2 are made into a closed state of contacting each other by energization force of a spring 6, and the tip metal fittings 2 are made into an open state of separating from each other by pressing the clip body parts 3 to mutual direction to displace at a second position against the energization force by the spring 6, the respective clip body parts 3 have clip extension members 10 movably fitted in a longitudinal direction of the clip body parts 3.

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measurement lead clip device that is often used in a digital multimeter or the like and is used, for example, when performing highly accurate resistance measurement based on a four-terminal measurement method.

  Patent Document 1 shows a configuration of a measurement lead clip device that has been conventionally used for measurement by a four-terminal measurement method. Briefly described with reference to FIG. 5 attached to the present application, the measurement lead clip device 1 constitutes a clip gripping portion of the clip device 1 and has a clip main body (that is, a clip body portion) 3 having a tip metal fitting 2 at the tip. It has. The paired clip body portions 3 are arranged in a substantially V shape with the rotation support shaft 5 as a fulcrum, and the tip metal fitting 2 is abutted and biased in the closing direction by a spring 6.

  Therefore, in the conventional measurement lead clip device 1 having such a configuration, when the measurer grips the pair of clip body portions 3 with fingers and presses them toward each other, the distal end fitting 2 is opened. Next, when the object to be measured is sandwiched between the open end fittings 2 and the finger force is removed, the end fitting 2 is closed again by the force of the spring 6 disposed around the rotation support shaft 5.

  A sleeve 30 is disposed at the rear end of the clip body 3 opposite to the end fitting 2 (the side from which the cable 20 protrudes), and the cable 20 is disposed through the center hole of the sleeve 30. ing. The sleeve 30 is made of a soft material and can be bent with a certain bending radius. Therefore, the cable 20 is protected from breaking due to the bending of the cable 20 so as not to be bent at an acute angle.

Japanese Patent Laid-Open No. 9-80075

  However, the clip body part 3 in the conventional measurement lead clip apparatus 1 has a fixed length of about 4 cm, for example. Therefore, depending on the difference in the size of the hand of the measurer and the size of the clip device itself, it is not possible to put a finger on the clip body 3 alone, and there is a risk of putting a finger on the sleeve 30 at the rear end and putting force. There is.

  In that case, since the force which was not assumed originally is applied to the sleeve 30, there is a possibility that the disconnection may be accelerated.

  An object of the present invention is to provide a measurement lead clip device that can suppress a load on a sleeve caused by a difference in the size of a measurer's hand and a difference in the size of the clip device itself and does not accelerate cable disconnection. It is to be.

The above objective is accomplished by a measurement lead clip device according to the present invention. In summary, the present invention includes a pair of elongated clip body portions each provided with a tip metal fitting at one end and a cable connected to the tip fitting outwardly from the other end. Have
The paired clip body portions are swingably supported by a rotation support shaft, and are urged to a first position where the distal end fittings are in contact with each other by an urging force of a spring, In the measurement lead clip device in which the end fittings are opened apart from each other by pressing the clip body portions against each other against a biasing force by a spring and displacing them to a second position,
Each of the clip body portions includes a clip extension member that is movably attached in the longitudinal direction of the clip body portion.

  According to an embodiment of the present invention, a sleeve is attached to an end portion of the clip extension member opposite to the rotation support shaft, and the cable drawn from the clip body portion is inserted into the through hole of the sleeve. The sleeve is inserted, and the sleeve moves together with the clip extension member following the movement of the clip extension member along the longitudinal direction of the clip body portion.

  According to another embodiment of the present invention, the clip body portion has a substantially rectangular tube shape with a rectangular cross section, and the clip extension member has an elongated shape with a substantially “U” cross section. One end of the rotating spindle side is open, the other end is closed by a wall body, and is a clip extension cover arranged to cover the clip body, and the sleeve is attached to the closed end of the clip extension cover It has been.

  According to another embodiment of the present invention, grooves for guiding the clip extension cover are formed on both side walls of the clip body, and the clip extension cover guide is formed on both side walls of the clip extension cover. A rib for guiding the clip extension cover that fits into the groove is formed.

  According to another embodiment of the present invention, a recess is formed at a predetermined position in the groove for the clip extension cover guide, and the rib for the clip extension cover guide is a protrusion that fits into the recess. Is formed.

  According to the present invention, even when the measurer's hand is large or the clip device itself is small, the length of the clip body can be easily increased, and an unexpected force is applied to the sleeve. Can be prevented. Therefore, the load on the sleeve caused by the difference in the size of the hand of the measurer and the size of the clip device itself can be suppressed, and the disconnection of the cable is not accelerated.

1 shows an embodiment of a measurement lead clip device according to the present invention, and FIG. 1 (a) and FIG. 1 (b) are a side view and a front view of the measurement lead clip device, respectively, and FIG. These are the longitudinal cross-sectional views taken on line AA of FIG.1 (b). FIG. 2 shows a state in which the clip extension cover is extended to the maximum length in the measurement lead clip device of FIG. 1, and FIGS. 2 (a) and 2 (b) are a side view and a side view of the measurement lead clip device, respectively. It is a longitudinal cross-sectional view. It is a perspective view which shows the state by which the clip extension cover was extended by the measurement lead clip apparatus of FIG. 1 to the maximum length. FIG. 4A is a perspective view showing a state in which the clip extension cover is removed from the upper clip body, and FIG. 4B is a perspective view of the clip extension cover. It is a schematic block diagram which shows an example of the conventional measurement lead clip apparatus.

  Hereinafter, the measurement lead clip device according to the present invention will be described in more detail with reference to the drawings.

Example 1
FIGS. 1A to 1C show an embodiment of a measurement lead clip device 1 according to the present invention. FIGS. 1A and 1B are views of the measurement lead clip device 1, respectively. It is the side view and front view which show the whole structure, FIG.1 (c) is the longitudinal cross-sectional view taken on line AA of FIG.1 (b).

  Referring to FIGS. 1A to 1C, a measurement lead clip device 1 of this embodiment includes a pair of clip body portions 3 each having a tip metal fitting 2 at the tip. A clip extension member 10 is movably attached to the clip body portion 3, and a clip gripping portion of the clip device 1 is constituted by the clip body portion 3 and the clip extension member 10 as will be described in detail later. Accordingly, the clip extending member 10 may have any structure as long as it can extend the clip gripping portion, but in this embodiment, the clip extending member 10 has a cover shape that covers the clip body portion 3, and the clip body portion 3 has a longitudinal direction. The clip extension cover is movably fitted to the cover. The clip extension cover 10 will be described later.

  In this embodiment, the paired clip body portions 3 and 3 have the same structure, and are supported on the rotary support shaft 5 so as to be swingable through a support portion 4 formed integrally with the clip body portion 3. And are attached together. Further, in this embodiment, the clip body portion 3 is urged in a substantially V shape to the open state about the rotation support shaft 5 by a substantially V-shaped spring 6 attached to the rotation support shaft 5. Has been placed. Accordingly, the tip fitting 2 is normally biased by the spring 6 to the first position (closed position) as shown by the solid line in FIG. The clip body part 3 is integrally formed with an electrically insulating material, for example, a resin such as ABS, together with the support part 4, and the end fitting 2 is also integrally formed and incorporated when the clip body part 3 and the support part 4 are formed. It is. At the time of measurement, the measurer grasps the clip gripping part made up of the clip body part 3 and the clip extension cover 10 with a finger and presses them toward each other, as shown by a one-dot chain line in FIG. 2 (closed position), the end fittings 2 can be separated from each other to be opened.

  In this embodiment, the clip body portion 3 is formed in a rectangular tube shape whose transverse cross-sectional shape is substantially rectangular, as can be understood with reference to FIG. In FIG. 4A, the upper clip body 3 shows a state where the clip extension cover 10 is removed.

  As can be understood with reference to FIG. 1 (c), the tip metal fitting 2 extends outwardly from the support portion 4 of the clip body portion 3, and has a measuring end 2 a that sandwiches the object to be measured, and a corner. A cable connecting end 2b extending into the clip body 3 which is cylindrical, and the cable connecting end 2b is the end of the clip body 3 opposite to the rotary shaft 5 side. It is electrically connected to the cable 20 drawn into the clip body part 3 through the through hole 7 of the part (rear end part) 3a.

  In addition, although mentioned later in detail, in this invention, the sleeve 30 is not provided in the rear-end part of the clip trunk | drum 3, but the sleeve 30 is attached to the clip extension cover 10 mentioned later.

  As described above, the measurement lead clip device 1 of the present embodiment has a rotating support shaft (fulcrum) 5 when a measurer grips a pair of clip gripping portions including the clip body portion 3 and the clip extension cover 10 with a finger. As shown in FIG. 1A, the end fittings 2 and 2 are in an open state (a state indicated by an alternate long and short dash line in FIG. 1A). Further, when the object to be measured is sandwiched between the open end fittings 2 and 2 and the finger force is removed, the end fittings 2 and 2 are closed again by the force of the spring 6 disposed around the rotation support shaft 5, and the end fitting 2 2, the object to be measured can be held (the state indicated by the solid line in FIG. 1A).

  The characteristic configuration of the present invention will be described with reference to FIGS. 2 (a), (b), FIG. 3, and FIGS. 4 (a), (b).

  According to the present embodiment, as shown in FIGS. 2A and 2B, the clip extension cover 10 is disposed so as to be movable along the longitudinal direction of the clip body portion 3. As described above, in the present embodiment, the clip body portion 3 has a rectangular tube shape extending in the longitudinal direction. Therefore, as shown in FIG. 4B, the clip extension cover 10 has a “U” -shaped cross section, that is, has a ceiling wall 11 and both side walls 12, 12, and a longitudinal direction of the clip body portion 3. And the other end (the right end in FIG. 4B) is the wall body (closed end) 13. It is a closed shape. The clip extension cover 10 having such a shape can be integrally formed with a resin such as ABS, for example, and accordingly, the clip body portion from the rear wall 13 side of the clip body portion 3 to the rotating support shaft 5 side. 3 is inserted by being elastically pressed and inserted. As shown in FIG. 4B, the closed end 13 of the clip extension cover 10 has a mounting groove 14 having a substantially Ω shape (an opening with a narrow inlet and a wide inside) for mounting the sleeve 30. Is formed.

  According to the present embodiment, as understood with reference to FIGS. 2 (a), 4 (a), and (b), on the outer surfaces of both side walls 3b and 3b of the clip body portion 3 that is formed into a rectangular tube shape, Each of the clip extension cover guide grooves 8 is formed along the longitudinal direction over the substantially entire length of the clip body portion 3. On the other hand, the clip extension cover 10 has a clip extension cover guide rib 15 that is shaped to fit into the guide groove 8 of the clip body 3 on the inner surfaces of both side walls 12, 12 of the clip extension cover 10. Is formed. In the present embodiment, the groove 8 is a U-shaped concave groove in cross section, and the rib 15 is a rectangular convex protrusion having a complementary shape that fits into the groove 8. In the present embodiment, the rib 15 is provided from the opening end of the clip extension cover 10 over a predetermined distance (for example, about half of the groove 8). As described above, the rib 15 is fitted into the groove 8 over a predetermined length, whereby the clip extension cover 10 is stably held by the clip body 3 and the clip extension cover 10 is secured to the clip body 3. It can be moved smoothly.

  Further, according to the present embodiment, the first recess 8a for fixing the clip extension cover is formed at the end of the clip extension cover guide groove 8 on one end of the rotating support shaft 5, which is one end of the clip extension cover guide groove 8. A second recess 8b for fixing the clip extension cover is also formed in the central portion of the. On the other hand, a protrusion 16 for fixing the clip extension cover is formed at an end of the clip extension cover guide rib 15 on one end of the rotation support shaft 5 side.

  Therefore, when the clip extension cover 10 is fitted to the clip body part 3, the clip extension cover guide rib 15 is movably fitted into the clip extension cover guide groove 8 of the clip body part 3. Here, when the clip extension cover 10 is moved to the rotation support shaft 5 side of the clip body 3, the protrusion 16 of the clip extension cover guide rib 15 fits into the first recess 8 a of the clip extension cover guide groove 8. The clip extension cover 10 is fixed in place. That is, this state is a state (extension position) in which the clip gripping portion of the clip device 1 constituted by the clip body portion 3 and the clip extension cover 10 is most expanded and contracted.

  On the other hand, when a force is applied to the clip extension cover 10 on the side opposite to the rotation support shaft 5 side of the clip body 3 from the stretched position, the protrusion 16 of the clip extension cover guide rib 15 is used for the clip extension cover guide. The clip 8 is disengaged from the first recess 8 a of the groove 8, and the clip extension cover 10 can be moved to the side opposite to the rotation support shaft 5 side of the clip body 3. Further, when the clip extension cover 10 is moved, the protrusion 16 of the clip extension cover guide rib 15 fits into the second recess 8b formed in the center of the clip extension cover guide groove 8, and the clip extension cover 10 is moved to the second extension 8b. Fix in place. That is, in this state, the clip gripping portion of the clip device 1 is in the most extended state (extension position).

  Thus, according to the measurement lead clip device 1 of the present embodiment, the clip extension cover 10 is fixed at the position where the fixing protrusion 16 and the recess 8 (8a, 8b) fit. In this embodiment, since the fixing recesses 8 (8a, 8b) of the clip body part 3 are provided in two places, the clip extension cover 10 is operated at the two positions, that is, by operating by hand. It can be fixed at the telescopic position and the extended position. Of course, the length of the clip gripping portion of the clip device 1 can be adjusted more finely by increasing the depressions 8.

  In addition, the characteristic configuration of the present invention utilizes a substantially Ω-shaped mounting groove 14 in the rear wall 13 of the clip extension cover 10, as will be understood with particular reference to FIGS. 2 (b) and 3. A sleeve 30 is attached. That is, the sleeve 30 is formed into an elongated cylindrical body 31 having one end slightly larger than the rear end (that is, D30> d30), and a through hole 32 is formed at the center of the cylindrical body. Is inserted. Further, a groove 33 is formed in the circumferential direction at one end portion that is slightly enlarged, and the groove 33 is used to fit into the mounting groove 14 of the rear wall 13 of the clip extension cover 10. As a result, the sleeve 30 is attached to the clip extension cover 10. The sleeve 30 can be made of a soft material, such as a resin such as PVC, as in the conventional case.

  According to the measurement lead clip device 1 of the present invention configured as described above, since the sleeve 30 is fixed to the clip extension cover 10, it moves so as to follow the movement of the clip extension cover 10. As shown in FIG. 1A, when the clip extension cover 10 is fixed to the left in the drawing (expanded state), the length of the clip gripping portion is in a normal state, and the clip gripping portion may be small. If so, use it as is. In this state, when the clip gripping portion is small (or the hand is large) and the finger is likely to be put on the sleeve 30, the clip extension cover 10 is fixed to the right side in the drawing as shown in FIG. By doing (extension state), the clip body part 3 can be simply extended, the clip gripping part can be lengthened, and an unexpected force applied to the sleeve 30 can be prevented. it can.

The present invention is not limited, but specific examples of dimensions are as follows with reference to FIGS. 1 (c), 2 (b), 4 (a) and 4 (b).
-Clip body part Material: ABS
Dimensions: L3 = 45.8mm, H3 = 8.8mm, W3 = 8.6mm
・ Clip extension cover Material: ABS
Dimensions: L10 = 32mm, H10 = 8mm, W10 = 10.6mm
・ Sleeve Material: PVC
Dimensions: L30 = 20.5mm, D30 = 6.5mm, d30 = 5.5mm
Clip holding part: minimum length Lmin = 49.6 mm, maximum length Lmax = 61.6 mm

  According to the present invention, by adopting the above-described configuration, it is possible to suppress the load on the sleeve 30 caused by the difference in the size of the hand and the size of the clip gripper itself, which is a conventional drawback, and the cable 20 It is not necessary to accelerate the disconnection.

  In the above embodiment, the measurement lead clip device 1 of the present invention has been described as being used when performing highly accurate resistance measurement based on the four-terminal measurement method. And can be applied to all measuring lead clip devices.

DESCRIPTION OF SYMBOLS 1 Measurement lead clip apparatus 2 Tip metal fitting 3 Clip body part 4 Bearing part 5 Rotation support shaft (fulcrum)
6 Spring 8 Clip extension cover guide groove 10 Clip extension cover (clip extension member)
15 Rib for clip extension cover guide guide 20 Cable 30 Sleeve

Claims (5)

It has a pair of elongate clip body parts provided with a tip fitting on one end, and a cable connected to the tip fitting pulled out from the other end,
The paired clip body portions are swingably supported by a rotation support shaft, and are urged to a first position where the distal end fittings are in contact with each other by an urging force of a spring, In the measurement lead clip device in which the end fittings are opened apart from each other by pressing the clip body portions against each other against a biasing force by a spring and displacing them to a second position,
Each of the clip body portions includes a clip extension member that is movably attached in the longitudinal direction of the clip body portion.   A sleeve is attached to an end portion of the clip extension member opposite to the rotation support shaft, and the cable drawn from the clip body portion is inserted into a through hole of the sleeve, and the sleeve is The measurement lead clip device according to claim 1, wherein the clip lead member moves together with the clip extension member following the movement of the clip extension member along the longitudinal direction of the clip body part.   The clip body portion has a substantially rectangular tube shape with a rectangular cross-sectional shape, the clip extension member has an elongated shape with a substantially `` U '' cross section, and one end on the rotating support shaft side opens. The other end is a clip extension cover that is closed by a wall and covers the clip body, and the sleeve is attached to the closed end of the clip extension cover. A measurement lead clip device according to claim 1.   Grooves for guiding the clip extension cover are formed on both side wall portions of the clip body portion, and the clip extension covers that fit into the groove for the clip extension cover guide are formed on both side wall portions of the clip extension cover. The measurement lead clip device according to claim 3, wherein a rib for guiding is formed.   The groove for the clip extension cover guide is formed with a recess at a predetermined position, and the rib for the clip extension cover guide is formed with a protrusion that fits into the recess. Item 5. The measurement lead clip device according to Item 4.

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