JP2016072109A - Static eliminator and static elimination method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow for forcible static elimination while eliminating troublesome operation.SOLUTION: A static eliminator 1, where a port of the apparatus body 11 and a measured object are connected by a coaxial cable 13, removes static electricity charging the coaxial cable 13, and includes a base member 2 and a static elimination contact 3. The base member 2 has an insertion hole 2f into which the coaxial cable 13 is inserted, and is secured to the adaptor 12 of the apparatus body 11. The static elimination contact 3 is fixed rotatably to the base member 2, and removes static electricity by coming into contact with the central conductor and outer conductor of the coaxial connector 13a of the coaxial cable 13 inserted from the insertion hole 2f, with a position facing the insertion hole 2f as an initial position.SELECTED DRAWING: Figure 3

Description

  The present invention is based on static electricity charged in a coaxial cable connecting between an electronic device and a device under test (DUT: Device Under Test) when performing various measurements of the device under test (DUT) using an electronic device such as a measuring instrument. The present invention relates to a static eliminator and a static eliminator for preventing damage to electronic equipment.

  For measuring instruments as electronic equipment, for example, specific signal systems based on various wired communication standards such as SDH (Synchronous Digital Hierarchy), PDH (plesiochronous digital hierarchy), OTN (Optical Transport Network), Ethernet (registered trademark), etc. A device having a function of performing various measurements of an object to be measured is known. This type of measuring instrument is equipped with multiple measurement hardware and multiple measurement applications in a single device, and each measurement application controls the predetermined measurement hardware according to a certain procedure. The object is measured and the measurement result is provided to the user.

  By the way, when measuring an object to be measured using this type of measuring instrument, the measuring instrument and the object to be measured are connected via a coaxial cable. In a measuring instrument that is difficult to perform and handles high-frequency signals, when the coaxial cable is connected, the measuring instrument may be damaged by static electricity charged in the coaxial cable. For this reason, it is necessary to remove static electricity charged in the coaxial cable before connecting the coaxial cable to the measuring instrument.

  Thus, as a conventional static elimination device that prevents damage to the measuring instrument due to static electricity charged on the coaxial cable, for example, a device disclosed in Patent Document 1 below is known. The static eliminator disclosed in Patent Document 1 has a conductive support whose first end is coupled to a device and a conductive support for the purpose of grounding the central conductor of the coaxial cable to the device including the coaxial connector. And a conductive hinge having a raised target area that is pivotally attached to the second end of the contact and contacts the central conductor. In the static eliminator disclosed in Patent Document 2, when the conductive hinge is at the first stop position, the coaxial cable is prevented from reaching the coaxial connector, and when the conductive hinge is at the second stop position, It is possible to reach the coaxial connector of the coaxial cable. That is, in the static eliminator disclosed in Patent Document 2, the conductive hinge has a raised target region that contacts the central conductor of the coaxial connector, and the coaxial cable is electrostatically charged by a turning operation that turns the conductive hinge. The charge is removed.

JP 2001-023792 A

  However, since the conventional static eliminator disclosed in Patent Document 1 described above is integrated with the chassis of the device, it cannot be easily attached to an existing measurement unit later. And the conventional static elimination apparatus disclosed by patent document 1 is the structure attached so that the electroconductive hinge which comprises a target area | region might rotate with respect to a support | pillar. For this reason, when static electricity is removed from the coaxial cable, an operation of turning the conductive hinge provided with the target region is indispensable, and there is a problem that the operation is troublesome for the user.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a static eliminator and a static eliminator that can eliminate troublesome operations when neutralizing.

In order to achieve the above object, a static eliminator described in claim 1 of the present invention is configured such that a port of an electronic device and an object to be measured are connected by a coaxial cable 13 to eliminate static electricity charged in the coaxial cable. In the static eliminator 1,
A base member 2 fixed to a port of the electronic device and having an insertion hole 2f into which the coaxial cable is inserted;
A position facing the insertion hole is an initial position, and a contact member that contacts the central conductor and the outer conductor of the coaxial connector 13a of the coaxial cable inserted from the insertion hole and removes the static electricity is provided in the insertion hole. A neutralizing contact 3 fixed to the base member so as to move forward and backward is provided.

The static eliminator described in claim 2 is the static eliminator according to claim 1,
A movable member 5 having a stopper 5a that is movable back and forth with respect to the insertion hole 2f in conjunction with the rotation of the static elimination contact 3;
The stopper is movable to a position where it closes a part of the insertion hole when the static elimination contact rotates in a direction to retract from the initial position.

The static eliminator described in claim 3 is the static eliminator according to claim 1 or 2,
An operation member 3c for rotating the static elimination contact 3 is provided on the static elimination contact.

The static eliminator described in claim 4 is the static eliminator according to any one of claims 1 to 3,
A biasing member 7 for biasing the neutralizing contact by applying rotational force so that the rotational force of the static elimination contact 3 is increased when the static elimination contact 3 is rotated by a predetermined amount in the direction of retreating from the initial position. It is characterized by having.

The static elimination method described in claim 5 is the static elimination method using the static elimination device 1 of any one of claims 1 to 4,
Fixing the fixing portion 2e of the base member 2 to a port of the electronic device;
The coaxial connector 13a of the coaxial cable 13 is inserted into the insertion hole 2f of the base member facing the contact member 3b of the static elimination contact 3, and the central conductor and the outer conductor of the coaxial connector are brought into contact with the contact member to eliminate static electricity. And the step of performing.

  According to the present invention, the conventional troublesome operation for static elimination can be eliminated and the static elimination can be forcibly performed in a series of operation processes for connecting the coaxial cable to the port of the electronic device.

  If the movable member has a stopper that moves forward and backward relative to the insertion hole in conjunction with the rotation of the static elimination contact, when the static elimination contact is rotated from the initial position, the stopper moves and the insertion hole Since a part is closed, it is possible to prevent the coaxial cable from coming out of the insertion hole and prevent the coaxial cable from coming off. For the next use of the static eliminator, the coaxial cable cannot be removed unless the static elimination contact is returned to the initial position.

  If the operation member is provided in the charge removal contact, the open / close state of the charge removal contact and the open / close state of the stopper can be selectively performed by operating the operation member.

  If the structure is provided with an urging member, the rotational force of the urging member cooperates so that the rotational force of the static elimination contact increases from the time when the operation member is operated to rotate the static elimination contact by a predetermined amount. The coaxial connector can be connected by rotating the static elimination contact without requiring any extra force.

(A) It is a figure which shows the whole structure of the static elimination apparatus which concerns on this invention, Comprising: It is a figure which shows a static elimination contact in a closed state, and an insertion port is an open state. (B) It is a right view of (a). (C) It is a left view of (a). (A) In the static elimination apparatus which concerns on this invention, a static elimination contact is a figure which shows an open state and an insertion port shows a closed state. (B) It is a right view of (a). (A)-(d) It is operation | movement explanatory drawing of the static elimination method using the static elimination apparatus which concerns on this invention.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  The static eliminator and the static eliminator according to the present invention are employed in electronic equipment such as measuring instruments (for example, error rate measuring apparatus, spectrum analyzer, oscilloscope, signal generator) that perform various measurements of a device under test (DUT). is there.

  The static eliminator and the static eliminator according to the present invention are particularly applicable to various measurements (for example, error detection measurement, delay measurement) of an object to be measured (DUT) using an electronic device that is difficult to employ a protection circuit and is sensitive to static electricity. It is intended to prevent damage to the electronic device due to static electricity charged in the coaxial cable connecting the electronic device and the device under test when performing packet loss measurement, throughput measurement, or the like.

[About the configuration of electronic devices]
The electronic device is composed of measuring devices such as an error rate measuring device, a spectrum analyzer, an oscilloscope, and a signal generator, for example, and includes a plurality of ports (not shown) such as an input port and an output port in the device main body 11. And when connecting a coaxial cable to a port, the type fixed with an adapter and the type fixed to a screwed port with a fixing nut are known. Although the present invention can be applied to any type, the case where the coaxial cable 13 is fixed by the adapter 12 will be described as an example. As shown in FIG. 3, an adapter 12 is detachably attached to the port on a coaxial connector (not shown) of the device main body 11 indicated by a dotted line.

  As shown in FIG. 3, the adapter 12 includes a cap nut 12a, a first connection portion 12b, and a second connection portion 12c. The cap nut 12a is standardized, and is tightened to a specified torque with a tool such as a torque wrench, for example, when connected to the coaxial connector of the device body 11. The first connecting portion 12 b is formed at one end of the cap nut 12 a with a smaller diameter than the cap nut 12 a and is connected to the coaxial connector of the device main body 11. The second connection portion 12c is formed at a smaller diameter than the cap nut 12a at the other end of the cap nut 12a located opposite to the first connection portion 12b, and a coaxial connector (cap nut) 13a of the coaxial cable 13 is connected thereto.

  In the following, a case where the configuration and method of the present invention are applied to a measuring instrument will be described as an example. However, the apparatus is not limited to a measuring instrument as long as it is a device that is particularly susceptible to static electricity charged on the coaxial cable 13. Can be applied.

[Overall configuration of static eliminator]
As shown in FIG. 1, the static eliminator 1 is schematically configured to include a base member 2, a static elimination contact 3, a fixed member 4, a movable member 5, a connecting member 6, and an urging member 7.

  As shown in FIG. 3, the base member 2 is attached to an adapter 12 provided in a coaxial connector of a port in the device main body 11. The base member 2 is made of a band-shaped metal member, and both side surfaces in the width direction of the metal member are opened so that the attachment / detachment operation of the device main body 11 to / from the adapter 12 can be performed, and both end portions in the length direction of the metal member are perpendicular to each other. It is bent. More specifically, as shown in FIG. 1A, the base member 2 includes a planar bottom surface portion 2a and side surface portions 2b formed to be opposed to each other by bending both ends of the bottom surface portion 2a in the length direction at right angles. , 2c, and a mounting surface portion 2d formed by bending the tip of the side surface portion 2c further inward at a right angle. The side surface portion 2b is formed with a fixing hole 2e as a fixing portion for fixing the base member 2 to the port (adapter 12) of the device main body 11. Further, an insertion hole 2f into which the coaxial connector 13a of the coaxial cable 13 is inserted is formed in the side surface portion 2c so as to face the fixing hole 2e.

  The neutralization contact 3 is for neutralizing static electricity charged on the coaxial cable 13 and is made of a metal member that is rotatably fixed to the fixing member 4. As shown in FIG. 1A and FIG. 2B, the static elimination contact 3 has arrows A and C in which one end of the plate-like member 3a advances and retreats with respect to the insertion hole 2f with respect to the central axis 4c of the fixing member 4. It is pivotally supported so as to be rotatable in the direction. Further, a contact member 3 b and an operation member 3 c are provided on the tip (open end) side of the plate-like member 3 a that forms the base of the static elimination contact 3.

  As shown in FIGS. 1A and 1B, the contact member 3 b is provided at the center of the front end side of the plate-like member 3 a, and contacts the center conductor and the outer conductor of the coaxial cable 13 to charge the coaxial cable 13. In order to eliminate static electricity, the tip surface is made of a metal member formed in a spherical shape. The operation member 3c rotates the static elimination contact 3 in the directions of arrows A and C to operate to the state (open state) shown in FIG. 2 (a) or the initial position (closed state) shown in FIG. 1 (a). As shown in FIGS. 1 and 2, the knob is integrally formed at one end of the front end side of the plate-like member 3a. In addition, the operation member 3c can also be formed by a separate component from the plate-like member 3a.

  As shown in FIGS. 1A and 1B, the static elimination contact 3 has a closed position facing the approximate center of the insertion hole 2 f of the base member 2 as an initial position. Since the neutralizing contact 3 connects the coaxial cable 13 to the adapter 12 of the device main body 11, when the coaxial connector 13a of the coaxial cable 13 is inserted from the insertion hole 2f of the base member 2, the front end surface of the contact member 3b becomes the coaxial connector. The central conductor and the outer conductor of 13a are contacted, the center conductor and the outer conductor of the coaxial connector 13a are short-circuited, and the static electricity charged in the coaxial cable 13 is removed.

  The static elimination contact 3 in this example is a state in which the state of FIG. 2B in which the contact member 3b does not face the insertion hole 2f is “open state”, and the contact member 3b faces the approximate center of the insertion hole 2f. The state of 1 (b) is “closed state”.

  The fixing member 4 fixes and holds the static elimination contact 3 with respect to the base member 2 and has a fixed base 4a and a rotating member 4b. The fixed base 4 a is fixed near the side surface portion 2 c of the bottom surface portion 2 a of the base member 2. The rotating member 4b is formed of a disk-like member that is attached to both sides of the fixed base 4a so as to be rotatable about a central axis 4c. As shown by arrows A and C in FIGS. 1A and 2A, the rotating member 4b is a plate-like member of the charge eliminating contact 3 such that the charge eliminating contact 3 rotates about the central axis 4c. One end of 3a is fixed.

  The movable member 5 is made of a U-shaped metal member whose both ends are bent at a right angle, and is connected to the fixed member 4 via a connecting member 6. The movable member 5 is movable back and forth with respect to the insertion hole 2f in conjunction with the rotation of the charge removal contact 3 (arrows B and D in FIGS. 1A and 2A). That is, when the static elimination contact 3 rotates around the central axis 4c of the fixed member 4 in the direction of arrow A in FIG. As shown in FIG. 2 (b), above the side surface portion 2c (FIGS. 1 (a) and 2 (c) along the inner wall surface of the side surface portion 2c so as to block a part (substantially lower half) of the insertion hole 2f. It moves to the arrow B) of a). On the other hand, the movable member 5 transmits its turning force via the connecting member 6 when the static elimination contact 3 rotates in the direction of arrow C in FIG. As shown in FIG. 1 (b), below the side surface 2c along the inner wall surface of the side surface 2c so as to retract from the insertion hole 2f (arrow D in FIGS. 1 (a) and 2 (a)). It is movable.

  The movable tip portion of the movable member 5 functions as a stopper 5 a for preventing the coaxial cable 13 from coming off. The stopper 5a is intended to prevent the coaxial cable 13 from being removed unless the static elimination contact 3 is returned to the initial position for the next use of the static elimination device 1, and the coaxial cable 13 inserted from the insertion hole 2f is inserted into the insertion hole 2f. To prevent you from leaving. More specifically, in the stopper 5a, the coaxial connector 13a of the coaxial cable 13 which has been inserted through the insertion hole 2f and finished removing electricity is pushed into the adapter 12 side of the device main body 11, and the electricity removing contact 3 connects the central axis 4c of the fixing member 4 to the stopper 5a. When it rotates in the direction of arrow A in FIG. 2A as the center, it moves in a closed state so as to close the insertion hole 2f in conjunction with the rotation of the static elimination contact 3, and the coaxial cable 13 comes out of the insertion hole 2f. The coaxial cable 13 is prevented from coming off.

  Note that the stopper 5a in this example is shown in FIG. 2B in which the insertion hole 2f is not closed in the “open state” and a part (substantially lower half) of the insertion hole 2f is closed. ) State is “closed state”.

  The connecting member 6 is composed of a linear member such as a metal rod or a metal wire, for example, to transmit the turning force of the static elimination contact 3 to the movable member 5 and move the movable member 5 in conjunction with the rotation of the static elimination contact 3. The fixed member 4 and the movable member 5 are connected. 1 and 2, one end of the two wires is locked to the main body of the fixed member 4, and the other end is locked to the attachment hole 5 b of the movable member 5. As a result, the fixed member 4 and the movable member 5 are connected via the connecting member 6 at two locations on both side surfaces.

  The urging member 7 is made of, for example, a coil spring, and is provided between the mounting surface portion 2 d of the base member 2 and the movable member 5. When the biasing member 7 operates the operation member 3c to rotate the static elimination contact 3 in a direction (arrow A direction in FIG. 2A) to retract from the initial position, the biasing member 7 rotates to the static elimination contact 3 from that point. The static elimination contact 3 is energized so as to increase the rotational force by applying a force.

[Static elimination method using static eliminator]
Next, as a static elimination method using the static eliminator 1 configured as described above, a processing procedure of a static elimination operation for neutralizing static electricity charged on the coaxial cable 13 will be described with reference to FIGS. 3 (a) to 3 (d). To do.

  First, in order to fix the static eliminator 1 to the port of the device main body 11, the adapter 12 attached to a coaxial connector (not shown) provided in the port of the device main body 11 is removed. Next, the fixing hole 2 e of the base member 2 is inserted into a coaxial connector (not shown), and the adapter 12 is attached from the inside of the side surface portion 2 b of the base member 2. Thereby, the static elimination apparatus 1 is fixed and attached to the port (adapter 12) of the apparatus main body 11. FIG.

  Next, the coaxial connector 13 a of the coaxial cable 13 is inserted from the insertion hole 2 f of the base member 2 in order to connect the coaxial connector 13 a of the coaxial cable 13 to the adapter 12 of the device body 11. At this time, the stopper 5a of the movable member 5 is retracted from the insertion hole 2f and is in the open state, and the contact member 3b of the static elimination contact 3 waiting in the initial state is in the initial state facing the insertion hole 2f. When the coaxial connector 13a of the coaxial cable 13 is inserted from the insertion hole 2f in this state, the central conductor of the coaxial connector 13a is connected to the contact member 3b of the static elimination contact 3 waiting at the initial position as shown in FIG. The outer conductor is pressed and contacts. As a result, the central conductor and the outer conductor of the coaxial connector 13a are conducted through the contact member 3b of the static elimination contact 3, and static electricity charged in the coaxial cable 13 is eliminated.

  Then, when the coaxial connector 13a of the coaxial cable 13 from which static electricity has been removed is further pushed toward the adapter 12 of the device body 11, the charge removal contact 3 becomes the rotating shaft 4a of the fixing member 4 as shown in FIG. Is rotated in the direction of arrow A (counterclockwise direction). When the static elimination contact 3 rotates, the movable member 5 connected to the fixed member 4 via the connecting member 6 moves in the arrow B direction (upward direction). When the movable member 5 is moved, the stopper 5a of the movable member 5 moves in a direction to close the insertion hole 2f and is in a closed state. Thereby, it is possible to prevent the coaxial cable 13 from coming off from the insertion hole 2f closed by the stopper 5a. In this state, the coaxial connector 13 a of the coaxial cable 13 is connected to the adapter 12 of the device main body 11.

  When the coaxial connector 13a of the coaxial cable 13 is removed from the port (adapter 12) of the device body 11, as shown in FIG. 3D, the operation member 3c (knob) of the static elimination contact 3 is moved in the direction of arrow C (clockwise). Rotate in the rotation direction. Thereby, the movable member 5 connected to the fixed member 4 via the connecting member 6 moves in the direction of arrow D (downward). When the static elimination contact 3 returns to the original initial position, the stopper 5a of the movable member 5 moves in the direction of opening the insertion hole 2f in conjunction with the rotation of the static elimination contact 3 to be in the open state. Thereby, the coaxial cable 13 can be freely moved with respect to the insertion hole 2f, and can be pulled out from the insertion hole 2f.

  Thus, according to the static elimination apparatus and static elimination method of this example, when connecting the coaxial cable 13 to the adapter 12 of the apparatus main body 11, the coaxial cable 13 is inserted from the insertion hole 2f where the contact member 3b of the static elimination contact 3 faces. Then, the central conductor and the outer conductor of the coaxial connector 13a of the coaxial cable 13 come into contact with the contact member 3b of the static elimination contact 3, and the central conductor and the outer conductor of the coaxial connector 13a are electrically connected via the contact member 3b. As a result, when static electricity is removed from the coaxial cable 13, the troublesome operation for the user to turn the conductive hinge as in the conventional static elimination device disclosed in Patent Document 1 can be omitted. In a series of operation processes for connecting the cable 13 to the adapter 12 of the apparatus main body 11, static electricity charged on the coaxial cable 13 can be forcibly removed.

  Moreover, the static elimination apparatus 1 of this example is not the structure integrated with the chassis of the electronic device like the conventional static elimination apparatus disclosed by patent document 1, but the fixing hole 2e of the base member 2 is made into the apparatus main body 11. Since it is configured to be inserted and fixed to the adapter 12, it can be easily attached to the electronic device later as needed.

  Furthermore, since the static eliminator 1 of this example includes the movable member 5 having the stopper 5a that moves forward and backward with respect to the insertion hole 2f in conjunction with the rotation of the static eliminator contact 3, the static eliminator contact 3 rotates from the initial position. When moved, the stopper 5a of the movable member 5 is moved so as to block the insertion hole 2f in conjunction with the rotation of the static elimination contact 3, and the coaxial cable 13 inserted from the insertion hole 2f is inserted into the insertion hole. The escape from 2f can be prevented. Further, when the contact member 3b of the static elimination contact 3 is in the open state retracted from the insertion hole 2f and the static electricity of the coaxial connector 13 cannot be eliminated, the stopper 5a of the movable member 5 is in the closed state facing the insertion hole 2f. Yes, the coaxial connector 13a of the coaxial cable 13 cannot be attached to or detached from the insertion hole 2f. Thereby, for the next use of the static elimination apparatus 1, the coaxial cable 13 cannot be removed unless the static elimination contact 3 is returned to the initial position.

  Moreover, since the static elimination apparatus 1 of this example is the structure by which the knob as the operation member 3c was integrally provided in the static elimination contact 3, the opening / closing state of the static elimination contact 3 and the opening / closing state of the stopper 5a were selected by operation of the operation member 3c. Can be done automatically. At that time, the neutralizing contact 3 is provided with a biasing member 7 that biases the biasing contact 3 in the direction of retreating from the initial position, and when the neutralizing contact 3 is rotated by a predetermined amount by operating the operation member 3c. Since the urging force of the urging member 7 also cooperates so that the rotational force of the static elimination contact 3 increases, the neutralization contact 3 can be rotated to connect the coaxial connector without requiring extra force.

  Further, the static eliminator 1 of the present example has a configuration in which the static eliminator contact 3 is attached to the base member 2 via the fixing member 4 so as to be rotatable, but the static eliminator contact 3 moves forward and backward relative to the insertion hole 2f. Any configuration can be used. For example, the static elimination contact 3 is connected to the base member 2 via a linearly movable member so that the static elimination contact 3 moves linearly with respect to the base member 2 (eg, vertical movement of arrows B and D in FIG. 1A). You may make it attach. According to this structure, the depth dimension at the time of attaching the static elimination apparatus 1 to the port of an electronic device can be made small.

  Further, the base member 2 has a configuration in which a fixing hole 2e is formed as a fixing portion for fixing to the port of the electronic device, but the configuration is not limited to this configuration. That is, the base member 2 may be configured to be fixed to the port of the electronic device, and the fixing portion may be formed by a notch or the like, for example.

  In the above-described embodiment, the operation member 3c that is operated when returning the static elimination contact 3 to the initial position is provided only on one side end (one side) of the plate-like member 3a. It is good also as a structure which provides the member 3c in the both ends (both sides) of the plate-shaped member 3a. Thereby, in the state in which the static elimination apparatus 1 was attached to the adapter 12 of the apparatus main body 11, the operation member 3c can be operated without being influenced by a dominant hand. Further, in order to change the static elimination contact 3 in the arrow A direction by operating the operation member 3c in order to change the static elimination contact 3 from the closed state of FIG. 1A to the open state of FIG. 2A, Since the urging force of the urging member 7 cooperates so that the rotational force of the neutralizing contact 3 is increased from the time when the neutralizing contact 3 is rotated by a predetermined amount, the neutralizing contact 3 is rotated without requiring an extra force. The coaxial connector can be connected.

  As mentioned above, although the best form of the static elimination apparatus and static elimination method which concern on this invention was demonstrated, this invention is not limited with the description and drawing by this form. That is, it is a matter of course that all other forms, examples, operation techniques, and the like made by those skilled in the art based on this form are included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Static elimination apparatus 2 Base member 2a Bottom surface part 2b, 2c Side surface part 2d Mounting surface part 2e Fixing hole (fixing part)
2f Insertion hole 3 Static elimination contact 3a Plate-like member 3b Contact member 3c Operation member 4 Fixed member 4a Fixed base 4b Rotating member 4c Center shaft 5 Movable member 5a Stopper 6 Connecting member 7 Energizing member 11 Equipment body 12 Adapter 13 Coaxial cable 13a Coaxial connector

In order to achieve the above object, a static eliminator described in claim 1 of the present invention is configured such that a port of an electronic device and an object to be measured are connected by a coaxial cable 13 to eliminate static electricity charged in the coaxial cable. In the static eliminator 1,
A base member 2 fixed to a port of the electronic device and having an insertion hole 2f into which the coaxial cable is inserted;
A position facing the insertion hole is an initial position, and a contact member that contacts the central conductor and the outer conductor of the coaxial connector 13a of the coaxial cable inserted from the insertion hole and removes the static electricity is provided in the insertion hole. A static elimination contact 3 movably fixed to the base member so as to move forward and backward ,
A movable member 5 having a stopper 5a movable forward and backward with respect to the insertion hole in conjunction with the rotation of the static elimination contact;
The stopper is movable to a position where it closes a part of the insertion hole when the static elimination contact rotates in a direction to retract from the initial position .

The static eliminator described in claim 2 is the static eliminator according to claim 1,
An operation member 3c for rotating the static elimination contact 3 is provided on the static elimination contact .

The static eliminator described in claim 3 is the static eliminator according to claim 1 or 2,
A biasing member 7 for biasing the neutralizing contact by applying rotational force so that the rotational force of the static elimination contact 3 is increased when the static elimination contact 3 is rotated by a predetermined amount in the direction of retreating from the initial position. characterized by comprising.

The static elimination method described in Claim 4 is the static elimination method using the static elimination apparatus 1 in any one of Claims 1-3,
Fixing the fixing portion 2e of the base member 2 to a port of the electronic device;
The coaxial connector 13a of the coaxial cable 13 is inserted into the insertion hole 2f of the base member facing the contact member 3b of the static elimination contact 3, and the central conductor and the outer conductor of the coaxial connector are brought into contact with the contact member to eliminate static electricity. And steps to
And the step of moving the stopper 5a to a position where the stopper 5a closes a part of the insertion hole when the static elimination contact rotates in a direction to retract from the initial position .

The static elimination method described in claim 5 is the static elimination method according to claim 4 ,
The method further includes the step of providing the operation member 3c on the static elimination contact 3 .
The static elimination method described in claim 6 is the static elimination method according to claim 4 or 5,
When the static elimination contact 3 is rotated by a predetermined amount in the direction of retreating from the initial position, the biasing member 7 applies a rotational force to the static elimination contact 3 so that the rotational force of the static elimination contact 3 is increased. The method further includes the step of:

Claims (5)

In the static eliminator (1) in which the port of the electronic device and the object to be measured are connected by the coaxial cable (13), and the static electricity charged in the coaxial cable is eliminated.
A base member (2) fixed to a port of the electronic device and having an insertion hole (2f) into which the coaxial cable is inserted;
A position facing the insertion hole as an initial position, and a contact member for discharging the static electricity by contacting a central conductor and an outer conductor of the coaxial connector (13a) of the coaxial cable inserted from the insertion hole; A static eliminator comprising a static elimination contact (3) movably fixed to the base member so as to advance and retreat with respect to the hole. A movable member (5) having a stopper (5a) movable forward and backward with respect to the insertion hole (2f) in conjunction with the rotation of the static elimination contact (3);
2. The static eliminator according to claim 1, wherein when the static elimination contact rotates in a retracting direction from the initial position, the stopper moves to a position where the stopper closes a part of the insertion hole. The neutralization device according to claim 1 or 2, wherein an operation member (3c) for rotating the neutralization contact (3) is provided on the neutralization contact. When the static elimination contact (3) is rotated by a predetermined amount in the direction of retracting from the initial position, the static elimination contact (3) is energized by applying rotational force to the static elimination contact (3) so as to increase the rotational force. The neutralizing device according to any one of claims 1 to 3, further comprising a biasing member (7). In the static elimination method using the static elimination apparatus (1) in any one of Claims 1-4,
Fixing the base member (2) to a port of the electronic device;
The coaxial connector (13a) of the coaxial cable (13) is inserted into the insertion hole (2f) of the base member facing the contact member (3b) of the static elimination contact (3) to connect the central conductor and the outer conductor of the coaxial connector. Removing the static electricity by bringing it into contact with the contact member.

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