JP4598550B2 - Measuring clip - Google Patents

Description

  The present invention relates to a measurement clip, and more particularly to a measurement clip that is temporarily attached to a metal exposed portion of various electric devices and electrically connected to the metal exposed portion.

  A measurement clip for electrical connection used for temporary electrical connection to a screw terminal block used in various electrical equipment or electrical equipment is already known, and as such a measurement clip, A hook clip is commonly used.

  However, in recent years, there has been an increase in those designed to shield the side of the screw terminal block and expose only the upper part of the screw terminal block. In the screw terminal block having such a structure, It has been difficult to make electrical connection as easily as in the prior art because it is impossible to sandwich the head of the screw fixing the wire with the screw terminal block.

  For this reason, even when the side surface of the screw terminal block is shielded, it is possible to make contact with the upper portion of the screw terminal block. As a conventional technique for fixing to a screw terminal block, a contact rod to which a predetermined urging pressure is applied in a distal direction by a coil spring is accommodated in a hollow cylinder, and a lead wire is connected to the contact rod, and the contact rod Has been disclosed that electrically connects the contact rod and the screw on the screw terminal block side by pressing the screw onto the screw on the screw terminal block side, and adsorbing the hollow cylinder to the screw terminal block side with a magnet (patent) Reference 1).

Moreover, as another conventional technique, an insertion terminal used by being attached to a terminal cover of an electric device or the like is known, and according to this insertion terminal, a contactor pressed against a screw on the screw terminal block side and The contactor is screwed into an outer case that accommodates the contactor in a state in which a predetermined biasing pressure is applied in the distal direction by a coil spring, and an insertion hole formed on the outer periphery of the outer case and formed on the screw terminal block side. In a state where the contact portion is pressed against the screw on the screw terminal block side and is in contact with the screw, the screw portion is screwed into the insertion hole on the screw terminal block side so that it can be stably fixed. This point is disclosed (see Patent Document 2).
JP 2001-343398 A (2nd page, FIG. 1) Japanese Patent No. 3106684 (page 4, FIG. 8)

  However, in the technique disclosed in Patent Document 1, since the magnet's attractive force is used as a method of fixing the screw terminal block, there is a possibility that the magnetic signal affects the electric signal, and that the screw may become magnetized. There is a possibility that iron powder or the like adheres to the screw and induces a short circuit of the electric circuit due to rust.

  Moreover, in the technique disclosed in Patent Document 2, a coil spring is used as a method for fixing to the screw terminal block, and since no magnet is used, there is no magnetic influence, but the insertion formed on the screw terminal block side. Since the screw portion is of a type that is screwed into the hole, the structure on the screw terminal block side is limited, and the corresponding degree of freedom is narrowed. Furthermore, in the techniques of Patent Document 1 and Patent Document 2, since the coil spring is used to urge the contactor in the direction of the screw terminal block, the structure becomes complicated and the number of parts increases, so that the manufacturing cost increases. There was a problem.

  Therefore, there is a demand for a measuring clip that can be used for various electrical equipment or electrical equipment designed to shield the side surface of the screw terminal block and expose only the upper part without being affected by magnetism. It was.

The present invention has been made to solve such a problem, and an object of the present invention is to be able to be mounted so as not to be detached from a metal exposed portion of various electric devices and to be electrically connected to the metal exposed portion. An object of the present invention is to provide a side clip that can perform the above.

In order to achieve the object, in one aspect, a pair of conductive elastic contact pieces disposed opposite to each other with a distal end extending from a proximal end side as a free end, and a distal end side of the pair of elastic contact pieces Engaging protrusions formed on the opposite surface and the opposite surface, and if the pair of elastic contact pieces are lightly grasped and inserted into the tool insertion port of the dedicated tool, The mating protrusion engages with the tool insertion slot, and separation from the tool insertion slot is prevented.

The invention according to claim 1 is a pair of conductive contacts in which an operating force in the opening direction is applied to the distal end side when an operating force in the closing direction is applied to the proximal end centering on an intermediate fulcrum shaft in the longitudinal direction. The pair of contact pieces includes an extension portion that extends so that the distal end side is crossed and the operation force is applied and the cross state is released when the operation force is not applied to the proximal end side, and the extension Engagement protrusions formed on the opposite surface side and the opposite surface side of the distal end side of the portion, and the distal end side of the pair of contact pieces is provided with a light operating force on the proximal end side of the pair of contact pieces. If the hand is released, the engagement protrusion engages with the tool insertion slot, and detachment from the tool insertion slot is prevented.

  Further, in order to attach the pair of contact pieces to the head of a plus screw as a metal exposed portion, for example, a large operating force is applied to the proximal end side to open the distal end side, and the plus screw is attached to the opened distal end side. Insert the head. Also in this case, the engagement protrusion engages with the head of the plus screw, and the separation from the head is prevented.

In the invention according to claim 2 , since the engaging protrusion protrudes in a direction inclined from the distal end side toward the proximal end side, the engaging protrusion engages with the metal exposed portion and the metal exposed portion This has the advantage that the separation of the is prevented.

According to said one aspect , if there is a tool insertion slot in the metal exposure part of various electric equipment, a pair of elastic contact pieces can be inserted into this tool insertion slot, and the pair of elastic contact pieces The engagement protrusion formed on the distal end side can prevent the tool from being detached from the insertion slot.

According to the invention which concerns on Claim 1 , if there exists a tool insertion slot in the metal exposure part of various electric equipment, a pair of contact piece can be inserted in this tool insertion slot, and also this pair of contact piece of The engagement protrusion formed on the distal end side can prevent the tool from being detached from the insertion slot. Furthermore, even when the metal exposed portion does not have a tool insertion port, the pair of contact pieces can be sandwiched between the outer peripheral portions of the metal exposed portion, and the engagement protrusion can prevent the metal exposed portion from being detached. it can.

According to the invention which concerns on Claim 2 , an engagement protrusion can engage with a metal exposure part and can prevent detachment | leave from this metal exposure part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
1 and 2 are views showing the appearance of the measurement clip according to the first embodiment.

  The measuring clip 10 is temporarily attached to a metal exposed portion of various electric devices to enable electrical connection with the metal exposed portion, and is a pair of conductive electrodes disposed to face each other with a predetermined interval. The elastic contact pieces 12, 12 are provided. The pair of elastic contact pieces 12 and 12 has free ends on the distal end sides 12b and 12b extending in the longitudinal direction from the proximal end side 12a. The material of the elastic contact piece 12 may be an elastic member having a spring property and a good electrical conductor. In the present embodiment, the measurement clip 10 is formed into a tweezers shape by bending a single plate-like elastic member (a spring metal plate) substantially symmetrically at the base end side 12a.

  As a result, the measurement clip 10 has a tweezers shape in a side view, and is formed in a substantially triangular shape in a plan view in which the proximal end side 12a is narrow and the distal end side 12b is wide. With this shape, the operation force when the operation force is applied by gripping the base end side 12a of the pair of elastic contact pieces 12, 12 is reduced. In addition, the pair of elastic contact pieces 12 and 12 have engaging projections 13 and 13 formed on the side opposite to the facing surface on the distal end side 12b. The engagement protrusion 13 is formed from the distal end side to the proximal end side of the elastic contact piece 12 so as not to be easily detached when being attached to the tool insertion port 28a (see FIG. 3) of the minus screw 28 as the metal exposed portion. It is preferable to form it so that it protrudes in a direction inclined toward it (like a “hook” of a fishhook) (see FIG. 11). Further, a wire 14 is attached to the base end side 12a of the pair of elastic contact pieces 12, 12, and the base end side 12a of the pair of elastic contact pieces 12, 12 is covered with a vinyl tube 15 as an insulating member. Has been.

  As described above, as shown in FIG. 3, in use, the pair of elastic contact pieces 12 and 12 of the measuring clip 10 are lightly grasped and an operating force is applied in the closing direction, and a minus screw serving as a metal exposed portion. The engaging projections 13 and 13 are inserted into the tool insertion port 28a of the minus driver formed on the head of 28, and thereafter the operating force in the closing direction is released (details will be described later).

[Second Embodiment]
FIG. 4 is a diagram illustrating an appearance of the measurement clip 30 according to the second embodiment.
This measuring clip 30 has a configuration substantially the same as that of a conventional shed clip, and a pair of conductive contact pieces 31 disposed opposite to each other so as to be rotatable around a middle fulcrum shaft 38 in the longitudinal direction. 32. The measurement clip 30 is covered with a vinyl tube 36 as an insulating member on a base end side 33 that is gripped to open and close the pair of contact pieces 31 and 32. A wire 41 is attached to the base end side 33 of the pair of contact pieces 31 and 32. Further, although not shown, a torsion coil spring that normally biases the base end side 33 in the opening direction is mounted between the fulcrum shaft 38 and the contact pieces 31 and 32. When an operating force is applied to the proximal end side 33 against an urging force in the opening direction, an acting force in the opening direction is applied to the distal end side 34.

Here, in the present embodiment, as shown in FIGS. 4 and 5, the pair of contact pieces 31 and 32 cross at the distal end side 34 in a state where no operating force is applied to the proximal end side 33. It has the extended parts 31a and 32a extended. The extension portions 31a and 32a are in contact with each other at the midway intersection 35 and further extend in a cross manner from the contact position. One extension 31a is notched at the center in the width direction at the intersection 35 and is bifurcated. The other extension 32a is slidably fitted into the notch 39 and is in contact with the intersection 35. Yes. In addition, engagement protrusions 37 and 40 are formed on the surface opposite to the opposing surfaces at the ends of the extension portions 31a and 32a. The engagement protrusions 37 and 40 are also projected in a direction inclined from the distal end side to the proximal end side of the contact pieces 31 and 32 so as not to be easily detached when the metal projection is attached to the metal exposed portion (the fishing hook It is preferable to form (such as “bare”) (see FIG. 11).
As described above, as shown in FIG. 6, when the measurement clip 30 is used, the measurement clip 30 is engaged with the tool insertion port 28a of the minus screw driver formed on the head of the minus screw 28 as the exposed metal portion. The protrusions 37 and 40 are inserted and engaged with the tool insertion port 28a. Further, as shown in FIG. 7, in order to attach to the plus screw 42 as the metal exposed portion, the head of the plus screw 42 is sandwiched between the three engagement protrusions 37, 37, and 40 of the measurement clip 30 and the Engage with the head (details will be described later).

[Usage example of measurement clip]
Next, a method of using the measurement clips 10 and 30 will be described.
FIGS. 8 and 9 show the external appearances of the screw terminal blocks 16 and 17, respectively. FIG. 8 shows a type in which the wire 19 and the wire 20 are connected by a minus screw 28 operated by a minus driver. FIG. 9 shows a type in which the wire 22 and the wire 23 are connected by a plus screw 42 operated by a plus driver.

  In FIG. 10, the control unit 24 has a unit main body 25, and signals from various sensors 26 are input to the unit main body 25 via the screw terminal block 16 (or 17). If it is determined that the signals from the various sensors 26 are not normally sent to the unit body 25 side, the measuring clip 10 or 30 is attached to the minus screw 28 or the plus screw 42 of the screw terminal block 16 (or 17). Then, the measuring device 27 checks whether or not the signal is normally transmitted.

FIG. 11 shows an embodiment in which the engagement protrusion 13 (or 37, 40) of the measurement clip 10, 30 is attached to the minus screw 28.
As shown in the figure, first, in order to insert the engaging protrusion 13 of the measuring clip 10 into the tool insertion port 28a of the minus screw 28, vinyl covering the proximal end side 12a of the pair of elastic contact pieces 12, 12 is used. The tube 15 is gripped and a slight operating force is applied in a direction (closed direction) in which the pair of elastic contact pieces 12 and 12 are close to each other. Then, since the tip side 12b of a pair of opposing elastic contact pieces 12 and 12 approaches, the engagement protrusions 13 and 13 are inserted into the tool insertion port 28a of a minus driver as a dedicated tool in this state, and then the operation Release power. At this time, a repulsive force is generated in the opening direction by the elastic force at the distal end side 12b of the pair of elastic contact pieces 12, 12. On the other hand, since the engaging protrusion 13 protrudes in a direction inclined from the distal end side toward the proximal end side like a “hook” of a fishing hook, the pair of elastic contact pieces 12, 12 has a tool of a minus screw 28. A component of repulsive force acts in the direction of the arrow in FIG. 11 from the insertion port 28a. As a result, the pair of elastic contact pieces 12, 12 is prevented from being pulled out by a force in the insertion direction of the tool insertion port 28 a of the minus screw 28, and the pair of elastic contact pieces 12 is released even if the hand is released. , 12 are not easily detached from the tool insertion port 28a of the minus screw 28.

  Next, in order to insert the engagement protrusions 37 and 40 of the measurement clip 30 into the tool insertion port 28 a of the minus screw 28, the vinyl tube 36 covering the base end side 33 of the pair of contact pieces 31 and 32 is held. Applying a small operating force in the closing direction. That is, a light operating force is applied so that the distal end side 34 of the pair of contact pieces 31 and 32 is in a state in which a cross state is maintained. Then, since the front end side 34 of a pair of contact pieces 31 and 32 approaches slightly, the engagement protrusions 37 and 40 are inserted in the tool insertion port 28a in this state, and operation force is cancelled | released after that. At this time, as described above, a repulsive force is generated in the opening direction by the elastic force on the tip side of the pair of contact pieces 31 and 32. On the other hand, the engaging protrusions 37 and 40 are formed so as to project in a direction inclined from the distal end side 34 toward the proximal end side 33, so that the pair of contact pieces 31 and 32 have a repulsive force from the tool insertion port 28 a. Is exerted in the insertion direction to prevent separation from the tool insertion port 28a.

Next, FIG. 12 shows an embodiment in which the engagement protrusions 37, 37, and 40 of the measurement clip 30 are attached to the plus screw 42.
In the figure, when a large operating force in the closing direction is applied to the base end side 33 so that the pair of contact pieces 31 and 32 release the cross state, the distal end side 34 is opened and the engagement protrusions 37, 37, and 40 are opened. Is in an opposing state (see FIG. 7), and the engagement protrusions 37, 37, and 40 can hold the outer peripheral portion of the plus screw 42 as the metal exposed portion at three points. Also in this case, the engaging projections 37, 37, 40 are formed so as to project from the distal end side 34 toward the proximal end side 33 like a “hook” of the fishing hook, so that even if the hand is released, the positive screw It does not easily leave the head of 42.

(Appendix 1)
In a measurement clip that is temporarily attached to a metal exposed part of various electrical devices and enables electrical connection with the metal exposed part,
A pair of conductive elastic contact pieces disposed opposite to each other at a predetermined interval, with a distal end extending from the base end side as a free end,
A measuring clip, comprising: an engagement protrusion formed on the opposite side of the pair of elastic contact pieces on the tip side.

(Appendix 2)
When the operating force in the closing direction is applied to the base end side against the biasing force that constantly biases the base end side in the open direction, the tip end is disposed opposite to the center pivot point in the longitudinal direction. A pair of electrically conductive contact pieces to which an acting force in the opening direction is applied on the side, and the pair of contact pieces are temporarily attached to the metal exposed portions of various electrical devices to be electrically connected to the metal exposed portions In the measurement clip that enables
The pair of contact pieces are extended portions that extend so that the tip side crosses in a state where the operating force is not applied,
A measuring clip, comprising: an engaging protrusion formed on an opposite surface side and an opposite surface side of the distal end side beyond the cross position of the extension portion.

(Appendix 3)
The measuring clip according to Supplementary Note 1 or Supplementary Note 2, wherein the engagement protrusion protrudes in a direction inclined from the distal end side toward the proximal end side.

(Appendix 4)
4. The measurement clip according to appendix 2 or appendix 3, wherein the pair of contact pieces are in contact with each other at the cross position.

It is a front view of the clip for measurement of this Embodiment. It is a top view same as the above. It is a figure which shows a state when mounting | wearing the tool clip of a minus screw with the measurement clip. It is a front view of the clip for measurement of this Embodiment. It is a top view same as the above. It is a figure which shows a state when mounting | wearing the tool clip of a minus screw with the measurement clip. It is a figure which shows a state when attaching the measuring clip to a plus screw. It is a figure which shows the external appearance of a screw terminal block. It is a figure which shows the external appearance of a screw terminal block. It is a figure which shows a structural block when mounting | wearing a measurement clip with a screw terminal block. It is an enlarged view when the measurement clip is attached to the tool insertion port of the minus screw. It is an enlarged view when a clip for measurement is attached to a plus screw.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Measurement clip 12 Elastic contact piece 12a Base end side 12b Tip end 13 Engagement protrusion 16 Screw terminal block 17 Screw terminal block 28 Minus screw 28a Tool insertion port 30 Measurement clip 31 Contact piece 32 Contact piece 33 End side 34 Base End side 37 Engagement protrusion 38 Intermediate fulcrum 40 Engagement protrusion 42 Phillips screw

Claims (2)

When the operating force in the closing direction is applied to the base end side against the biasing force that constantly biases the base end side in the open direction, the tip end is disposed opposite to the center pivot point in the longitudinal direction. A pair of electrically conductive contact pieces to which an acting force in the opening direction is applied on the side, and the pair of contact pieces are temporarily attached to the metal exposed portions of various electrical devices to be electrically connected to the metal exposed portions In the measurement clip that enables
The pair of contact pieces are extended so that the tip side crosses in a state where the operating force is not applied and the operating force is applied and the cross state is released , and
A measuring clip, comprising: an engaging protrusion formed on an opposite surface side and an opposite surface side of the distal end side beyond the cross position of the extension portion. The measuring clip according to claim 1, wherein the engaging protrusion protrudes in a direction inclined from the distal end side toward the proximal end side.

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