JP6957370B2 - Adsorption probe and measuring device - Google Patents

Description

The present invention relates to an adsorption probe capable of maintaining a contact state between a contact object and a contact surface of a terminal by an adsorption force, and a measuring device provided with the adsorption probe.

As this type of adsorption probe, a contact path clip (hereinafter, also simply referred to as “clip”) disclosed in Patent Document 1 below is known. This clip is, for example, an instrument used when connecting to a terminal of a terminal block to input / output an electric signal and performing a test based on the electric signal, and is arranged in a substantially cylindrical clip and the clip. It is configured to include a magnet portion and a lead wire connected to the magnet portion. In this clip, by bringing the magnet part close to the terminal, the magnet part attracts the terminal by the magnetic force of the magnet part and connects the terminal and the magnet part, so it is different from the crocodile type clip that connects by sandwiching the terminal. , It is possible to easily connect a clip to a terminal arranged at a position where it is difficult to pinch or a terminal having a shape which is difficult to pinch.

Japanese Unexamined Patent Publication No. 2006-127966 (Page 3-5, Fig. 1-2)

However, the above-mentioned conventional clip has the following problems to be improved. Specifically, in the conventional clip, for example, when connecting to a terminal protruding in the horizontal direction, the terminal is attracted by the magnet portion of the clip with the axial direction of the clip horizontal. In such a usage state, a force corresponding to the weight of the lead wire extending downward from the base end portion of the clip is applied downward to the base end portion, and the moment of this force acts on the contact portion between the magnet portion and the terminal. do. Therefore, the conventional clip has a problem that the connection state between the magnet portion and the terminal may be released in such a usage state, and improvement of this point is desired.

The present invention has been made in view of the problem to be improved, and an object of the present invention is to provide an adsorption probe and a measuring device capable of reliably maintaining a contact state between a contact target and a terminal.

In order to achieve the above object, the adsorption probe according to claim 1 has a terminal having a contact surface formed in contact with an object to be contacted at the tip portion and has an adsorption portion, and is said to have an adsorption force due to the adsorption force of the adsorption portion. The main body that can maintain the contact state between the contact target and the contact surface, the branch that branches from the branch on the base end side of the main body, and the tip side that is electrically connected to the terminal via the branch. A suction probe including a cable connected to the main body, which is provided with a support portion which is arranged in the main body portion and supports an intermediate portion between the tip end portion and the base end portion of the cable. With the position of the contact surface along the axial direction of the main body as a reference position, the support position of the support portion supporting the intermediate portion along the axial direction is along the axial direction of the branch portion. The intermediate portion can be supported at the support portion on the reference position side of the branch position or on the side opposite to the branch position with the reference position in between.

Further, the suction probe according to claim 2 is the suction probe according to claim 1, wherein the support portion is a curved position along the axial direction of a curved portion where the cable in the supported state is curved by the weight of the cable itself. The intermediate portion can be supported at the support portion that coincides with the reference position.

Further, the adsorption probe according to claim 3 is the adsorption probe according to claim 1 or 2, wherein the support portion is configured to be movable along the axis of the main body portion.

Further, the adsorption probe according to claim 4 is provided at at least one of the tip portion and the support portion of the main body portion in the adsorption probe according to any one of claims 1 to 3, and is provided along the axial direction. A protrusion projecting from the tip portion is provided, and the protrusion is provided on a portion of at least one of the outer circumferences of the outer periphery thereof on the side opposite to the support portion side with the axis line interposed therebetween.

Further, the suction probe according to claim 5 is the suction probe according to claim 4, wherein the support portion has a curved position along the axial direction of a curved portion where the cable in a supported state is curved by the weight of the cable itself. The intermediate portion can be supported at the support portion on the opposite side of the branch position with the reference position in between.

Further, the adsorption probe according to claim 6 is the adsorption probe according to any one of claims 1 to 5, wherein the branch portion is formed in a straight tubular shape and branches so as to form an obtuse angle with respect to the main body portion. ing.

Further, the measuring device according to claim 7 measures the measured quantity for the contact target based on the adsorption probe according to any one of claims 1 to 6 and an electric signal input via the adsorption probe. It is equipped with a measuring unit.

According to the suction probe according to claim 1 and the measuring device according to claim 7, the axis of the support portion that supports the intermediate portion of the cable is set with the position of the contact surface of the terminal along the axial direction of the main body as a reference position. Cable at the support position where the support position along the direction is on the reference position side of the branch position along the axial direction of the branch part where the branch part branches from the main body, or on the opposite side of the branch position across the reference position. By providing a support portion that can support the intermediate portion of the cable, a portion where a force corresponding to its own weight is applied from the contact surface (for example, a curved portion where the cable is curved by its own weight) as compared with a configuration without a support portion. Since the distance along the axis can be shortened, the moment acting on the contact surface due to the weight of the cable in the state where the axis direction is horizontal can be sufficiently reduced. Therefore, according to this suction probe and the measuring device, it is possible to reliably prevent a situation in which a large moment acts on the contact surface and the contact state between the contact object and the contact surface is released. As a result, the contact object and the contact surface are released. It is possible to reliably maintain the contact state with.

Further, according to the suction probe according to claim 2 and the measuring device according to claim 7, the support portion where the curved position along the axial direction of the curved portion where the cable in the supported state is curved due to its own weight and the reference position coincide with each other. By configuring the support portion so that the intermediate portion of the cable can be supported in the above, the distance along the axis line from the contact surface of the terminal to the curved portion can be set to 0 mm (or almost 0 mm), so that the axis direction is horizontal. It is possible to prevent (or almost not) apply a moment to the contact surface in this state. Therefore, according to this suction probe and the measuring device, the contact state between the contact target and the contact surface can be more reliably maintained.

Further, according to the suction probe according to claim 3 and the measuring device according to claim 7, the position of the support portion can be arbitrarily changed by configuring the support portion so as to be movable along the axis of the main body portion. Can be done. Therefore, according to this suction probe and the measuring device, the contact state between the contact target and the contact surface of the terminal is ensured according to the form of the cable such as the length, weight and hardness (easiness of deformation) of the cable. The middle part of the cable can be supported at the optimum support site to maintain.

Further, according to the suction probe according to claim 4 and the measuring device according to claim 7, a protrusion protruding from the tip end portion of the main body portion along the axial direction of the main body portion sandwiches the axis line on the outer periphery of the support portion. By providing it on the side opposite to the support part side, when the axial direction is horizontal, the protrusion abuts on the upper part of the contact target and a downward force corresponding to the weight of the cable is applied to the contact target and the protrusion. It can be received at the contact part with the part. Therefore, according to this suction probe and the measuring device, the downward movement of the suction probe due to the downward force corresponding to the weight of the cable can be reliably regulated, and as a result, the suction probe moves downward to be contacted. It is possible to reliably prevent the situation where the contact state between the terminal and the contact surface of the terminal is released.

Further, in the suction probe according to claim 5 and the measuring device according to claim 7, the curved position along the axial direction of the curved portion where the supported cable is curved by the weight of the cable is the branch position with the reference position in between. The support portion is configured so that the intermediate portion can be supported at the support portion on the opposite side. In this configuration, a moment that tends to rotate the suction probe upward by a downward force corresponding to the weight of the cable in a state where the axial direction is horizontal acts on the contact surface of the suction probe. Further, in this suction probe, a protrusion protruding from the tip of the main body is provided on a portion opposite to the support portion side with an axis line on the outer periphery of the support portion. Therefore, according to this suction probe and the measuring device, for example, when a screw as a contact target is arranged on the terminal block, the suction probe is rotated upward by a moment acting on the contact surface of the suction probe. Even if it is attempted, the protrusion abuts on the wall surface of the terminal block, and the rotation of the suction probe is restricted. As a result, according to the suction probe and the measuring device according to claim 7, it is possible to reliably prevent a situation in which the contact state between the contact target and the contact surface of the terminal is released due to the action of the moment due to the weight of the cable. be able to.

Further, according to the suction probe according to claim 6 and the measuring device according to claim 7, the contact surface of the terminal is formed by branching the branch portion formed in a straight tube so as to form an obtuse angle with respect to the main body portion. The branch portion can function as a handle when performing the work of contacting the contact target. In addition, when the axis of the main body is horizontal and the contact state between the contact object and the contact surface is maintained, an upward force is applied to the branch portion to set the moment with the contact surface as the fulcrum. Since the contact state between the contact object and the contact surface can be easily released by acting on the contact surface, the work of separating the contact surface from the contact object when the measurement using the adsorption probe is completed can be easily performed. Can be done.

It is a top view which shows the structure of the measuring apparatus 1. It is a block diagram which shows the structure of the apparatus main body 2. It is a side view of the magnet probe 3. It is an exploded perspective view of the magnet probe 3. It is an exploded side view of the magnet probe 3. It is a front view of the support part 36. It is 1st explanatory drawing explaining the use method of the magnet probe 3. It is a 2nd explanatory drawing explaining the usage method of the magnet probe 3. It is a side view of the magnet probe 103. It is a structural drawing which modeled the structure of magnet probes 3,103. It is a 3rd explanatory drawing explaining the usage method of the magnet probe 3. It is a side view of the magnet probe 203. It is a structural drawing which modeled the structure of the magnet probe 203.

Hereinafter, embodiments of the adsorption probe and the measuring device will be described with reference to the accompanying drawings.

First, the configuration of the measuring device 1 shown in FIG. 1 will be described. The measuring device 1 is an example of the measuring device, and is configured to include the device main body 2 and a pair of magnet probes 3 and 3 as shown in the figure.

As shown in FIG. 2, the apparatus main body 2 includes a measuring unit 11, an operating unit 12, a display unit 13, a control unit 14, and a case 2a (see FIG. 1) in which each of these units is housed (or arranged). It is composed of. Further, as shown in FIG. 1, a pair of input terminals 2c for inserting and connecting the connection portion 35 attached to the cable 33 in the magnet probe 3 are provided on the front panel 2b of the case 2a. There is.

The measuring unit 11 executes a measurement process for measuring a measured quantity (voltage value or current value) based on an electric signal input via the magnet probe 3 under the control of the control unit 14.

As shown in FIG. 1, the operation unit 12 includes a dial switch 12a and a button switch 12b arranged on the front panel 2b of the case 2a, and outputs an operation signal when these are operated.

As shown in FIG. 1, the display unit 13 is arranged on the front panel 2b of the case 2a, and displays the voltage value and the current value measured by the measurement unit 11 under the control of the control unit 14.

The control unit 14 controls the measurement unit 11 and the display unit 13 according to the operation signal output from the operation unit 12.

The magnet probe 3 is used when it comes into contact with a contact target (for example, the screw 101 of the terminal block 100 shown in FIG. 3) by adsorption and inputs an electric signal supplied (applied) to the contact target to the apparatus main body 2. As shown in FIGS. 3 to 5, the suction probe is provided with a main body portion 31, a branch portion 32, a cable 33, a connection portion 34, a connection portion 35 (see FIG. 1), and a support portion 36. Has been done.

As shown in FIGS. 3 to 5, the main body 31 is formed of a non-conductive resin into a cylindrical shape as a whole. Further, as shown in FIGS. 4 and 5, the tip portion 31a of the main body portion 31 is provided with a conductive terminal 41 that makes contact with the contact target. In this case, as shown in FIG. 5, the terminal 41 includes a magnet 51, a yoke 52 arranged so as to surround the magnet 51, and a connecting conductor 53 connected to the magnet 51 and the yoke 52. It is configured. In the figure, a part of the terminal 41 is enlarged and shown as a cross-sectional view. Further, as shown in the figure, a contact surface 41a having an arc-shaped cross section is formed at the tip of the terminal 41 in order to improve the adhesion to the surface of the screw 101 as a contact target. There is. In this case, in the magnet probe 3, the attracting portion is formed by the magnet 51 and the yoke 52, and the contact object and the contact surface 41a of the terminal 41 are attracted and contacted by the magnetic force as the attraction force generated by the magnet 51 and the yoke 52. It is configured to maintain a contact state between the object and the contact surface 41a.

As shown in FIGS. 3 to 5, the branch portion 32 is formed in a cylindrical shape (an example of a straight tube) as a whole, and as shown in FIG. 8, has an obtuse angle with respect to the main body portion 31 (main body portion). It branches from the branch portion 31c on the base end portion 31b side of the main body portion 31 (so that the axis A of the 31 and the axis B of the branch portion 32 form an obtuse angle). Further, the branch portion 32 is integrally formed with the main body portion 31 by a non-conductive resin. Further, as shown in FIG. 5, the inside of the branch portion 32 is electrically connected to the terminal 41 of the main body portion 31 and is connected by inserting the connection terminal 62 of the connection portion 34 attached to the cable 33. A connection terminal 61 that can be connected to the terminal 62 is provided. In this case, the branch portion 32 can be used as a handle when the contact surface 41a of the terminal 41 is brought into contact with the contact target.

The cable 33 is a cable that inputs an electric signal supplied (applied) to the contact target to the apparatus main body 2, and as shown in FIG. 1, the connecting portion 34 attached to the tip portion 33a is a branch portion 32. By being inserted into the connection terminal 61, it is electrically connected to the terminal 41 via the connection terminal 61 (see FIG. 5), and the connection portion 35 attached to the base end portion 33b is the input terminal 2c of the apparatus main body 2. It is connected to the device main body 2 by being inserted into. Further, the cable 33 has flexibility, and as shown in FIGS. 7 and 8, the intermediate portion 33d between the tip end portion 33a and the base end portion 33b (see FIG. 1) is supported by the support portion 36. At the same time, in a state where the axis A of the main body 31 is horizontal (or substantially horizontal) (an example of a state in which the magnet probe 3 is used), the intermediate portion 33d is curved by its own weight in the vicinity of the supporting portion 36d where it is supported. The portion where the cable 33 is curved by its own weight is also referred to as a "curved portion 33c" (see both figures).

As shown in FIGS. 7 and 8, the support portion 36 is a member that supports the intermediate portion 33d (the portion between the tip portion 33a and the base end portion 33b) of the cable 33, and is in the axis A direction of the main body portion 31. It is attached (arranged) to the main body 31 so as to be movable along the above. The portion of the cable 33 supported by the support portion 36 is also referred to as a "support portion 36d" (see both figures). Further, as shown in FIGS. 3 to 6, the support portion 36 includes a tubular body 36a, a holding portion 36b, and a protrusion 36c.

The tubular body 36a is formed in a tubular shape into which the tip end portion 31a of the main body portion 31 can be inserted. Further, as shown in FIG. 6, three ribs 71 that come into contact with the outer peripheral surface of the main body 31 are formed on the inner peripheral surface of the tubular body 36a. As shown in FIGS. 7 and 8, the holding portion 36b is configured so that the cable 33 can be fitted, and holds the fitted cable 33.

As shown in FIG. 8, the protruding portion 36c is formed on the tubular body 36a so as to project from the tip end portion of the tubular body 36a along the axis A direction of the main body portion 31 in a state where the support portion 36 is attached to the main body portion 31. It is provided. Further, as shown in the figure, the protrusion 36c is on the side opposite to the support portion 36d side with the axis A of the main body 31 on the outer circumference of the tubular body 36a in a state where the support portion 36 is attached to the main body 31. It is provided in the upper part in the figure).

Since the magnet probe 3 is provided with the support portion 36, as shown in FIG. 8, the position of the contact surface 41a along the axis A direction of the main body portion 31 (in this example, the position of the tip of the contact surface 41a). Is set as the reference position P1, and the position P4 (corresponding to the support position) along the axis A direction of the support portion 36d supporting the intermediate portion 33d of the cable 33 is the branch portion 31c (branch from the main body portion 31). The position on the reference position P1 side from the position P3 (corresponding to the branch position) along the axis A direction of the portion 32 branching portion), or the position opposite to the position P3 across the reference position P1. It is possible to support the intermediate portion 33d of the cable 33 at the support portion 36d that satisfies the positional relationship. It is assumed that the "position on the reference position P1 side" includes the reference position P1. Further, in the magnet probe 3, as an example of a configuration that satisfies this positional relationship by adjusting the position of the support portion 36, as shown in the figure, the cable 33 supported by the support portion 36 is curved by its own weight. It is possible to support the intermediate portion 33d of the cable 33 at the support portion 36d where the position P2 (corresponding to the curved position) along the axis A direction of the curved portion 33c and the reference position P1 coincide with (or substantially coincide with). It has become.

Next, a measuring method using the measuring device 1 will be described with reference to the drawings. As an example, a measuring method for measuring the voltage value (measured quantity) of the voltage applied to the screw 101 of the terminal block 100 shown in FIG. 3 will be described. In this case, it is assumed that the screw 101 protrudes horizontally from the terminal block 100 as shown in the figure.

First, as shown in FIGS. 7 and 8, the support portion 36 is mounted (arranged) on the tip end portion 31a side of the main body portion 31 of the magnet probe 3. Specifically, the tip portion 31a of the main body portion 31 is inserted into the tubular body 36a of the support portion 36. At this time, the rib 71 formed on the inner peripheral surface of the tubular body 36a comes into contact with the outer peripheral surface of the tip portion 31a.

Next, as shown in FIGS. 7 and 8, the intermediate portion 33d of the cable 33 is fitted into the holding portion 36b of the support portion 36, and the intermediate portion 33d is held by the holding portion 36b. As a result, the support portion 36 supports the intermediate portion 33d of the cable 33. Next, the support portion 36 is moved along the axis A direction to adjust the position (position P4) of the support portion 36d. In this case, as an example, as shown in FIG. 8, the position P2 along the axis A direction of the curved portion 33c in which the cable 33 supported by the support portion 36 is curved by its own weight and the reference position P1 coincide with each other (or The position (position P4) of the support portion 36d is adjusted so as to be substantially the same). In this case, the rib 71 formed on the inner peripheral surface of the tubular body 36a is in contact with the outer peripheral surface of the tip portion 31a. Therefore, even if a force in the axis A direction due to the elasticity of the cable 33 is applied to the support portion 36, the movement of the support portion 36 along the axis A direction is restricted by the frictional force between the rib 71 and the outer peripheral surface, and the support portion 36 is supported. The misalignment of the portion 36d is prevented.

Subsequently, as shown in FIG. 1, the connection portion 35 attached to the base end portion 33b of the cable 33 of the magnet probe 3 is inserted into the input terminal 2c of the device main body 2, and the magnet probe 3 and the device main body 2 are inserted. To connect.

Next, the branch portion 32 is grasped and arranged on the tip portion 31a of the main body portion 31 in a posture in which the axis A of the main body portion 31 of the magnet probe 3 is in the same horizontal direction as the protruding direction of the screw 101, as shown in FIG. The contact surface 41a of the terminal 41 is brought into contact with the surface of the screw 101 as a contact target. At this time, the contact surface 41a between the screw 101 and the terminal 41 is attracted by the magnetic force generated from the magnet 51 and the yoke 52 (adsorption portion) forming the terminal 41, whereby the contact state between the screw 101 and the contact surface 41a is changed. Be maintained.

Here, a configuration in which the intermediate portion 33d of the cable 33 is not supported without the support portion 36, that is, the position P4 is located on the reference position P1 side of the position P3 or on the side opposite to the position P3 with the reference position P1 in between. Then, the conventional magnet probe (magnet probe 103 shown in FIG. 9) that does not satisfy the above positional relationship is compared with the magnet probe 3. In this case, in the magnet probe 103, as shown in the figure, the position P2 along the axis A direction of the curved portion 33c where the cable 33 is curved by its own weight is in the axis A direction of the branch portion 31c where the branch portion 32 branches. It is located on the side opposite to the reference position P1 (the side away from the reference position P1) with respect to the along position P3.

In this magnet probe 103, as shown in the left figure of FIG. 10 which models the structure, a downward force F corresponding to the own weight of the cable 33 is a curved portion 33c (or) in a state where the axis A of the main body 31 is horizontal. , Near the curved portion 33c), the distance L (or a distance substantially the same as the distance L) along the axis A from the contact surface 41a to the curved portion 33c and the force F with the contact surface 41a as a fulcrum. The productive moment (clockwise moment in the figure) acts on the contact surface 41a (the contact portion between the screw 101 and the contact surface 41a). Therefore, in the magnet probe 103, the contact state between the screw 101 and the contact surface 41a of the terminal 41 may be released by the action of this moment, and the magnet probe 103 may come off from the screw 101.

On the other hand, in the magnet probe 3, as shown in the right figure of FIG. 10 in which the structure is modeled, the position P2 of the curved portion 33c and the reference position P1 of the contact surface 41a coincide with or substantially coincide with each other, and the contact surface 41a The distance L along the axis A from to the curved portion 33c is 0 mm (or approximately 0 mm). Therefore, when the axis A of the main body 31 is horizontal, the moment due to the weight of the cable 33 does not act (or hardly acts) on the contact surface 41a (the contact portion between the screw 101 and the contact surface 41a). Become. As a result, the magnet probe 3 is prevented from being released from the contact state between the screw 101 and the contact surface 41a due to the action of a moment due to the weight of the cable 33.

Further, as shown in FIG. 8, in the magnet probe 3, since the protrusion 36c is provided on the support portion 36, the protrusion 36c abuts on the upper portion of the screw 101, and the protrusion 36c is in contact with the screw 101 in a downward direction corresponding to the weight of the cable 33. The force F can be supported by the contact portion between the screw 101 and the protrusion 36c. Therefore, in the magnet probe 3, the downward movement of the magnet probe 3 due to the force F is restricted, and the situation in which the contact state between the screw 101 and the contact surface 41a is released by the downward movement of the magnet probe 3 is prevented. Has been done.

Subsequently, in a state where the screw 101 and the contact surface 41a are in contact with each other, the dial switch 12a of the operation unit 12 in the apparatus main body 2 is operated to turn on the power and instruct the execution of the voltage measurement. At this time, the operation unit 12 outputs an operation signal, and the control unit 14 controls the measurement unit 11 according to the operation signal to cause the measurement unit 11 to execute the measurement process. In this measurement process, the measuring unit 11 measures the voltage value based on the electric signal input via the magnet probe 3 and outputs the voltage value data indicating the voltage value. Next, the control unit 14 outputs the display data for displaying the measured value to the display unit 13 based on the voltage value data output from the measuring unit 11. As a result, the voltage value is displayed on the display unit 13.

In this case, as described above, the magnet probe 3 prevents the situation in which the contact state between the screw 101 and the contact surface 41a due to the weight of the cable 33 is released. Therefore, in this measuring device 1, as a result of being able to perform measurement in a state where the screw 101 and the terminal 41 are surely in contact with each other, it is possible to accurately measure the voltage value.

Subsequently, the magnet probe 3 is separated from the screw 101. In this case, the branch portion 32 is grasped and an upward force is applied to the branch portion 32 as shown in FIG. At this time, a moment with the contact surface 41a of the terminal 41 as a fulcrum (counterclockwise moment in the figure) acts on the contact surface 41a (the contact portion between the screw 101 and the contact surface 41a), whereby the screw 101 The terminals 41 can be easily separated. As described above, the measurement of the voltage value of the voltage applied to the screw 101 of the terminal block 100 is completed.

As described above, according to the magnet probe 3 and the measuring device 1, the position P4 of the support portion 36d along the axis A direction is set with the position of the contact surface 41a along the axis A direction of the main body 31 as the reference position P1. , The cable at the reference position P1 side of the branch portion 31c where the branch portion 32 branches from the main body portion 31 along the axis A direction, or at the support portion 36d opposite to the position P3 with the reference position P1 in between. By providing the support portion 36 capable of supporting the intermediate portion 33d of the 33, the portion where the force F corresponding to its own weight is applied from the contact surface 41a (for example, the cable 33) as compared with the configuration without the support portion 36. Since the distance L along the axis A to the curved portion 33c) that is curved by its own weight can be shortened, the moment that acts on the contact surface 41a due to the own weight of the cable 33 when the axis A direction of the main body 31 is horizontal. Can be made small enough. Therefore, according to the magnet probe 3 and the measuring device 1, it is possible to reliably prevent a situation in which a large moment acts on the contact surface 41a and the contact state between the screw 101 and the contact surface 41a is released. As a result, the screw The contact state between the 101 and the contact surface 41a can be reliably maintained.

Further, according to the magnet probe 3 and the measuring device 1, the cable 33 at the support portion 36d where the position P2 along the axis A direction of the curved portion 33c where the cable 33 in the supported state is curved by its own weight and the reference position P1 coincide with each other. By configuring the support portion 36 so that the intermediate portion 33d of the above can be supported, the distance L along the axis A from the contact surface 41a to the curved portion 33c can be set to 0 mm (or approximately 0 mm). It is possible to prevent (or substantially not) act on the contact surface 41a in a state where the axis A direction of 31 is horizontal. Therefore, according to the magnet probe 3 and the measuring device 1, the contact state between the screw 101 and the contact surface 41a can be more reliably maintained.

Further, according to the magnet probe 3 and the measuring device 1, the support portion 36 is configured to be movable along the axis of the main body portion, so that the position of the support portion 36d (position P4 corresponding to the support position) can be arbitrarily set. Can be changed. Therefore, according to the magnet probe 3 and the measuring device 1, the contact between the screw 101 and the contact surface 41a depends on the shape of the cable 33 such as the length, weight, and hardness (easiness of deformation) of the cable 33. The intermediate portion 33d of the cable 33 can be supported by a support portion 36d that is optimal for reliably maintaining the state.

Further, according to the magnet probe 3 and the measuring device 1, the protrusion 36c protruding from the tip end 31a of the main body 31 along the axis A direction is placed on the support portion 36d side with the axis A on the outer periphery of the support portion 36. Is provided on the opposite side, so that when the axis A direction of the main body 31 is horizontal, the protrusion 36c abuts on the upper part of the screw 101 and exerts a downward force F corresponding to the own weight of the cable 33. It can be received at the contact portion between the screw 101 and the protrusion 36c. Therefore, according to the magnet probe 3 and the measuring device 1, the downward movement of the magnet probe 3 due to the force F can be reliably regulated, and as a result, the magnet probe 3 moves downward to the contact surface with the screw 101. It is possible to reliably prevent the situation where the contact state with the 41a is released.

Further, according to the magnet probe 3 and the measuring device 1, the contact surface 41a of the terminal 41 is made a contact target by branching the branch portion 32 formed in a straight tube so as to form an obtuse angle with respect to the main body portion 31. The branch portion 32 can function as a handle when performing the contacting work. Further, when the axis A of the main body 31 is horizontal and the contact state between the screw 101 and the contact surface 41a of the terminal 41 is maintained, an upward force is applied to the branch portion 32 to apply an upward force to the contact surface 41a. Since the contact state between the screw 101 and the contact surface 41a can be easily released by applying a moment with the above as a fulcrum to the contact surface 41a, the terminal 41 performed when the measurement using the magnet probe 3 is completed. The work of separating the contact surface 41a from the screw 101 can be easily performed.

The adsorption probe and the measuring device are not limited to the above configuration. For example, the position P2 along the axis A direction of the curved portion 33c where the cable 33 supported by the support portion 36 is curved by its own weight and the reference position P1 which is the position of the contact surface 41a of the terminal 41 along the axis A direction. The example of supporting the intermediate portion 33d of the cable 33 at the support portion 36d where the two are coincident (or almost coincident) has been described above. The position P4 can be arbitrarily defined as long as it satisfies the positional relationship that the reference position P1 side or the side opposite to the position P3 across the reference position P1 from the position P3 along the line. Therefore, it is possible to adopt a configuration in which the position P4 is defined at a position slightly closer to the position P3 than the reference position P1, or the position P4 is defined at a position further away from the position P3 than the reference position P1.

Specifically, the magnet probe 203 shown in FIG. 12 can be adopted. In the following description, the same components as those of the magnet probe 3 described above will be designated by the same reference numerals, and duplicate description will be omitted. As shown in the figure, the magnet probe 203 is configured to include a support portion 236 having a holding portion 236b longer than the holding portion 36b of the support portion 36 in place of the support portion 36 described above. As shown in the figure, when the support portion 236 is mounted on the tip end portion 31a side of the main body portion 31, the position P4 is located at a position farther from the position P3 than the reference position P1, and the cable 33 is located. The position P2 (curved position) of the curved portion 33c curved by its own weight along the axis A direction is configured to be opposite to the position P3 of the branch portion 31c along the axis A direction with the reference position P1 in between. There is. That is, in this magnet probe 203, the support portion 236 can support the intermediate portion 33d of the cable 33 at the position P4 (support portion) where the position P2 is opposite to the position P3 (branch position) with the reference position P1 in between. It is configured.

In this magnet probe 203, as shown in FIG. 13 which models the structure, a downward force F corresponding to the own weight of the cable 33 is applied to the left side (contact surface) in the figure when the axis A of the main body 31 is horizontal. By joining the branch portion 31c on the opposite side of the 41a, the moment (the product of the distance L and the force F along the axis A from the contact surface 41a to the curved portion 33c with the contact surface 41a as a fulcrum () The counterclockwise moment in the figure, which is the moment for rotating the magnet probe 203 upward, acts on the contact surface 41a (the contact portion between the screw 101 and the contact surface 41a). In this case, as shown in the figure, a protrusion 36c is formed on the support portion 236. Therefore, even if the magnet probe 203 is rotated counterclockwise (upward) in the figure by the moment acting on the contact surface 41a, the protrusion 36c comes into contact with the wall surface of the terminal block 100 and the rotation is caused. Be regulated. As a result, in the magnet probe 203 provided with the support portion 236, it is possible to reliably prevent the situation in which the contact state between the screw 101 and the contact surface 41a is released due to the action of the moment due to the weight of the cable 33. It has become.

Further, although the example provided with the support portion 36 configured to be movable along the axis A direction of the main body portion 31 has been described above, the support portion 36 fixed to the main body portion 31 and the support integrally formed with the main body portion 31 are provided. A portion 36 (that is, a support portion 36 that does not move along the axis A direction) can also be adopted.

Further, the magnet probes 3 and 203 described above employ a main body portion 31 and a branch portion 32 formed in a cylindrical shape. For example, a tubular shape (other than a cylinder) having an elliptical or polygonal cross section in cross section is adopted. A main body portion 31 or a branch portion 32 formed in a cylindrical shape can also be adopted. Further, a main body portion 31 or a branch portion 32 formed in an arbitrary shape other than the cylindrical shape can also be adopted.

Further, although the example provided with the branch portion 32 that branches from the main body 31 so as to form an acute angle with respect to the main body 31 has been described above, the branch portion that branches from the main body 31 so as to form a right angle to the main body 31 has been described above. 32 or a branch portion 32 that branches from the main body portion 31 so as to form an acute angle with respect to the main body portion 31 can also be adopted.

Further, although the example in which the branch portion 32 is configured by one cylindrical body (one straight pipe) has been described above, the branch portion 32 is composed of a combination of a plurality of tubular bodies and a curved tubular body. The branch portion 32 can also be adopted.

Further, the above-described example is described in which the protrusion 36c is provided only on the portion opposite to the support portion 36d side with the axis A of the main body portion 31 on the outer circumference of the support portion 36, but in addition to this portion, the support portion 36 It is also possible to adopt a configuration in which a protrusion similar to the protrusion 36c is provided on other parts of the outer circumference of the above. Further, it is also possible to adopt a configuration in which a protrusion similar to the protrusion 36c is provided over the entire outer periphery of the support portion 36 (that is, a configuration in which a cylindrical protrusion is provided). Further, instead of the support portion 36, a configuration in which a protrusion portion similar to the protrusion portion 36c is provided on the tip portion 31a of the main body portion 31 can be adopted. Further, it is also possible to adopt a configuration in which a protrusion similar to the protrusion 36c is provided on both the support portion 36 and the tip portion 31a of the main body portion 31.

Further, although the example in which the magnet probe 3 is used with the axis A horizontal is described above, the magnet probe 3 can also be used with the axis A in a state other than horizontal.

Further, the example in which the contact surface 41a of the terminal 41 is brought into contact with the screw 101 of the terminal block 100 as the contact target has been described above, but the contact target is not limited to this, and various objects (ferromagnetic materials) that can be attracted by magnetic force are not limited to this. Is included. Further, it is also possible to adopt a configuration in which the contact object and the contact surface 41a are attracted by an attractive force other than the magnetic force such as suction.

Further, although the example of measuring the voltage as the detected amount using the magnet probe 3 has been described above, the magnet probe 3 can also be used when measuring the detected amount other than the voltage such as current and electric power. Further, when the electric power supplied to the screw 101 of the terminal block 100 is supplied (powered) to another supply target, the magnet probes 3, 203 can be used as the magnet probe for supply (power supply).

1 Measuring device 3 Magnet probe 11 Measuring part 31 Main body part 31a Tip part 31b Base end part 31c Branch part 32 Branch part 33 Cable 33c Curved part 33d Intermediate part 34 Connection part 36 Support part 36c Protrusion part 36d Support part 41 Terminal 41a Contact surface 51 Magnet 52 Yoke 101 Screw A Axis P1 Reference position P2, P3, P4 position

Claims (7)

A main body in which a terminal on which a contact surface for contacting a contact target is formed is arranged at the tip portion and has a suction portion, and the contact state between the contact target and the contact surface can be maintained by the suction force of the suction portion. An adsorption probe including a portion, a branch portion branched from a branch portion on the base end side of the main body portion, and a cable whose tip end side is electrically connected to the terminal via the branch portion.
A support portion provided on the main body portion to support an intermediate portion between the tip end portion and the base end portion of the cable is provided.
With the position of the contact surface along the axial direction of the main body as a reference position, the support position of the support portion supporting the intermediate portion is the axial direction of the branch portion. An adsorption probe configured to be able to support the intermediate portion at the support portion which is on the reference position side of the branch position along the line or on the side opposite to the branch position across the reference position. The support portion is configured to be able to support the intermediate portion at the support portion where the curved position along the axial direction of the curved portion where the cable in the supported state is curved by the weight of the cable and the reference position coincide with each other. The adsorption probe according to claim 1. The suction probe according to claim 1 or 2, wherein the support portion is configured to be movable along the axis of the main body portion. A protrusion provided on at least one of the tip portion and the support portion of the main body portion and projecting from the tip portion along the axial direction is provided.
The suction probe according to any one of claims 1 to 3, wherein the protrusion is provided on a portion opposite to the support portion side with the axis on at least one of the outer circumferences. The support portion is the support portion in which the curved position of the curved portion where the cable in the supported state is curved by the weight of the cable is opposite to the branch position with the reference position in between. The adsorption probe according to claim 4, which is configured to support an intermediate portion. The adsorption probe according to any one of claims 1 to 5, wherein the branched portion is formed in a straight tubular shape and branched so as to form an obtuse angle with respect to the main body portion. A measuring device including the suction probe according to any one of claims 1 to 6 and a measuring unit for measuring a measure to be measured with respect to the contact target based on an electric signal input via the suction probe.

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