JP5791938B2 - Test probe for measuring instrument - Google Patents

Description

  The present invention relates to a test probe for a measuring instrument in which a contact pin protrudes from the tip side.

  A measuring instrument such as a tester is provided with the necessary measurement circuit in the casing because it is necessary to measure voltage, current and resistance when installing electrical equipment and repairing faults. A plug included in the measuring instrument test probe is inserted into the input terminal, and a contact pin in the measuring instrument test probe is brought into electrical contact with the measurement object so that necessary measurement can be performed.

  As a measuring instrument test probe used in this case, for example, as disclosed in Patent Document 1, the applicant has a contact pin that protrudes in a needle shape from the distal end side of the probe main body. Is generally used.

That is, the meter test probe, the code comprising: a probe main body having a contact pin which projects from the previous end, the plug previously drawn from the rear end side of the contact pin and the electrically conductive is not the probe body portion The plug included in the cord is inserted into the input terminal on the measuring instrument side and electrically connected, and then the necessary measurement work is performed by bringing the contact pin into electrical contact with the measurement target part. Can be done.

Japanese Utility Model Publication No. 6-45898

  By the way, in the conventional measuring instrument test probe including the above-mentioned Patent Document 1, the contact pin always protrudes from the distal end side of the probe main body 1 as shown in FIG. It is necessary to cover this to protect it.

  However, since the cap 3 is simply covered on the tip 2 side including the contact pin of the probe main body 1, it may be accidentally lost when it is removed and put in during measurement work. There was an inconvenience that the measuring instrument test probe was dropped and lost while carrying the measuring probe while it was not in use.

  In view of the above-mentioned problems found in the prior art, the present invention provides a measuring instrument test probe in which a protective cover corresponding to a conventional cap is retractably built in the probe main body side of the measuring instrument test probe so as not to be lost. The purpose is to provide.

The present invention has been made to achieve the above object, through the probe body portion is protruded contact pins from the distal end, the inner space of the probe body portion by connecting one end to the contact pin the A test probe for a measuring instrument comprising at least a cord having a plug for insertion into an input terminal of a measuring instrument at the other end drawn from the rear end side of the probe main body, wherein the probe main part is a part of the probe main part . Yes a rotating gear capable to axially supported artificial rotational operation in the direction perpendicular to the axial direction is protruded portions from the proper position of the outer surface, the meshing groove for the rotary gear and meshing with the front surface An elastic protective cover that is spirally arranged around the inner cord portion located in the internal space so as to be able to advance and retreat, and an entrance that allows the elastic protective cover to enter and exit at an appropriate position closer to the tip. Be equipped , Wherein the time of contact pins used, the rotating gear to allow the elastic retraction of the protective cover by rotating in one direction to a position where the facing tip surface of the elastic protective cover to the doorway, when not in use of the contact pin The most important feature is that the elastic protective cover can be advanced to a position covering the entire contact pin by rotating the rotating gear in the other direction.

In this case, wherein the elastic protective cover, the entrance opening and engaged to whole preferably to leave the front protrusion to prevent the immersion is provided on the tip surface when the retracting it.

Further, wherein the elastic protective cover, the engagement groove be kept in provided in the rear end of the rear projection prevents the meshed with the rotary gear when covering the whole of the contact pin is advanced it You can also.

  According to the first aspect of the present invention, the elastic protective cover can be always integrally combined with the probe main body side in a state of being engaged with the rotating gear, so that the protective cover itself can be securely lost. Can be prevented.

In addition, when the contact pin is used, the tip of the elastic protective cover is placed at the entrance / exit provided in the probe main body by rotating the rotating gear in one direction by one-handed operation using the finger on the side holding the probe main body. contact pins exposed upon retracting the elastic protective cover to a position facing probing can be done immediately test with.

  Further, when the contact pin is not used, similarly, the elastic protective cover is advanced in the direction of the contact pin while rotating the rotating gear in the other direction by one hand operation to cover it, so that the enclosure secured in the protective cover It is possible to reliably protect the contact pin by enclosing it through the space regardless of the specific shape of the contact pin.

According to the invention of claim 2, elastic protective cover is provided with the front projection of entrance and engages the distal end surface, to ensure that the entire within the interior space of the probe body portion resulting in immersive Can be blocked.

According to the invention of claim 3, elastic protective cover, the rear end of the rear protrusion advancing portion including front ends meshing groove when covering the whole of the contact pin to prevent the mesh with the rotary gear Therefore, it is possible to reliably prevent the elastic protective cover from advancing excessively from the entrance / exit of the probe main body.

It is explanatory drawing which shows an example of this invention, (a) is a front view at the time of use of a contact pin, (b) is notched in order to show the principal part structure in (a) FIG. Explanatory drawing which expands partially and shows the meshing state of the rotation gear and elastic protection cover in this invention. It is explanatory drawing which shows the state at the time of use of a contact pin, of which (a) is the principal part perspective view, (b) is at the time of engagement with the front protrusion of the entrance / exit of (a) and an elastic protective cover. The principal part expanded sectional view is shown, respectively. The partial expansion perspective view of Fig.3 (a). The principal part perspective view which shows the state at the time of non-use of a contact pin. Explanatory drawing which expands partially and shows the positional relationship of the rotation gear at the time of non-use of a contact pin and an elastic protective cover. The principal part perspective view which shows the state at the time of non-use of the contact pin in a prior art example.

As is clear from FIGS. 1A and 1B, the present invention is a probe main body formed using an appropriate insulating member including a synthetic resin material in which a contact pin 16 protrudes from the tip 13 side. 12, plug for plugging the other end led out from through the interior space 15 of the probe body portion 12 by one end connected to the contact pin 16 the rear end side of the probe body portion 12 to the input terminal of the measuring instrument ( The measuring instrument test probe 11 is provided with at least a cord 22 having a not-shown cord.

In this case, the probe main body portion 12 is a predetermined length of inner cord portion arranged at a substantially central position in the axial direction as a partial portion of the cord 22 drawn from the rear end 14 side of the probe main body portion 12. 23 in addition to, and a resilient protective cover 32 having a spiral and made to advance withdrawal movement is capable disposed about the inner code portion 23 to the internal space 15.

In addition, the probe main body 12 includes an opening 18 that has a substantially rectangular shape and communicates with the internal space 15 at a position located approximately in the middle in the length direction, and from the outer surface 17 side through the opening 18. A rotating gear 20 is provided that is partly protruded and is pivotally attached so that an artificial rotation operation in a direction orthogonal to the axial direction (length direction) of the probe main body 12 is possible.

Further, for example, elastic protective cover 32 made of soft synthetic resin such as soft polystyrene or soft vinyl chloride, the lateral width of the front surface 32a of the engagement groove 34 of the number shall be sequentially meshed with rotating gear 20 by the internal space 15 It is arranged with a surrounding space 35 that is secured in a spiral manner surrounding the inner cord portion 23 in the length direction.

In this case, the elastic protective cover 32 has a meshing groove 34 provided in the elastic protective cover 32 meshes with the rotary gear 20 as shown in FIG. It is possible to move forward and backward according to the rotational force applied to.

Moreover, the elastic protective cover 32, the positional relationship can be and out through the doorway 19 as appropriate length portion including a front end portion 33 of the elastic protective cover 32 is provided in place of the tip 13 near the probe body portion 12 Therefore, it is arranged on the probe main body 12 side.

  That is, when the contact pin 16 that does not require the elastic protective cover 32 is used (during a probing test), the rotating gear 20 is rotated by a predetermined amount in one direction, for example, clockwise, as shown in FIG. The front end portion 33a side of the front end portion 33 of the protective cover 32 faces the entrance / exit 19 of the probe main body portion 12, and the remaining portion is disposed in a positional relationship that allows it to be retracted into the internal space 15.

In this case, the elastic protective cover 32, a front projection to prevent this FIGS. 3 (a) and when the retracted, the entire body retracts to engage the doorway 19 as shown in (b) 37 includes first end surface 33a, and thereby so that the whole of the probe body portion 12 of the interior space 15 within the elastic protective cover 32 can be prevented from being retracted.

Also, when not in use contact pins 16 that require elastic protective cover 32 (probing untested), by rotating a predetermined amount the rotary gear 20 is for example in the counterclockwise direction in the other direction, shown in FIG. 5 The contact pins 16 are arranged in a positional relationship so as to cover the entire contact pin 16 by the advancing portion including the front end portion 33 of the elastic protective cover 32 thus advanced.

In this case, the elastic protective cover 32 has a rear protrusion 38 that prevents the meshing groove 34 from meshing with the rotating gear 20 when the elastic protective cover 32 is advanced and covers the entire contact pin 16 as shown in FIG. It includes the rear end portion 34 as shown in 6, thereby elastically protective cover 32 from the entrance 19 of the probe body portion 12 is adapted to be able to prevent the advance excessively.

Next, the operation and effect of the present invention having the above-described configuration will be described with reference to the illustrated example. In the measuring instrument test probe 11, the contact pin 16 when the contact pin 16 is not used is connected to the front end portion 33 of the elastic protective cover 32. can be carried under the state shown in FIG. 5 covered with advanced site containing the.

That is, when the contact pin 16 is not used, the rotating gear 20 is moved in the other direction, for example, counterclockwise until the rear protrusion 38 prevents the meshing state with the meshing groove 34 of the elastic protective cover 32, as shown in FIG. As shown in the drawing, the surrounding space 35 secured by the advancing portion of the elastic protective cover 32 that is flexibly and smoothly fed out from the entrance / exit 19 by rotating the rotating gear 20 by a predetermined amount to a position where it cannot be rotated by the rear protrusion 38. within, which can be protected stably by previously housed in such a manner as to wrap the whole of the contact pins 16 regardless of specific shape of the contact pins 16.

  In addition, the elastic protective cover 32 itself is housed in the internal space 15 of the probe main body portion 12 while maintaining the meshing state with the rotary gear 20 and is integrally combined with the probe main body portion 12 side. The loss can be reliably prevented.

Further, when the contact pin 16 is used, the elastic protective cover 32 in the state shown in FIG. 5 is rotated in the direction shown in FIG. 5 by rotating the rotary gear 20 by a predetermined amount, for example, counterclockwise. As shown in FIG. 5, the contact pin 16 is configured so that the probing test can be performed by retracting the front end surface 33a of the elastic protective cover 32 to a position facing the entrance 19 and engaging the front projection 37 with the entrance 19. Can be exposed immediately.

In this case as well, the elastic protective cover 32 itself should be combined in an integrated manner in a state where it is housed in the internal space 15 of the probe body 12 while maintaining the meshing state with the rotary gear 20. by this it is possible to reliably prevent the loss.

  Thus, after the probing test is completed, the rotary gear 20 is rotated by a predetermined amount in the other direction, for example, counterclockwise until the rear protrusion 38 prevents the engagement state with the engagement groove 34 of the elastic protective cover 32. The state shown in FIG. 5 can be obtained by allowing the contact pin 16 to advance to a length sufficient to cover the entire contact pin 16 through the entrance / exit 19.

  For this reason, according to the present invention, the elastic protective cover 32 can always be integrally combined with the probe main body 12 side in a state where the elastic protective cover 32 is engaged with the rotary gear 20, so the elastic protective cover 32 itself It is possible to reliably prevent the loss of.

In addition, when the contact pin 16 is used, the rotation gear 20 is rotated in one direction by one-hand operation using a finger on the side that holds the probe main body 12, thereby elastically protecting the entrance / exit 19 provided in the probe main body 12. it can be carried out immediately probing test using a contact pin 16 which is exposed when the retracts the elastic protective cover 32 to a position where the distal end surface 33a of the cover 32 faces.

  Further, when the contact pin 16 is not used, the elastic protective cover 32 is spirally advanced in the direction of the contact pin 16 while covering the same while rotating the rotary gear 20 in the other direction by one-hand operation. Through the surrounding space 35 secured in the protective cover 32, the contact pin 16 can be reliably protected regardless of the specific shape.

The above is the description of the present invention based on FIGS. 1 to 3, and the gist of the present invention is not limited to this. For example, the elastic protective cover 32 is formed by giving a length such that the distal end surface 33a of the distal end portion 33 is always located in the entrance / exit 19 of the probe main body portion 12 when the rear projection 38 prevents the rotation gear 20 from rotating. By doing so, the front projection 37 can be omitted from the tip surface 33a. Further, the elastic protective cover 32 is provided with a warning mark that can be distinguished from a part located at the entrance 19 when the contact pin 16 is not used and a position located at the entrance 19 when the contact pin 16 is used. Thus, the front protrusion 37 and the rear protrusion 38 can be omitted. Further, the elastic protective cover 32 is provided with a front projection 37 on the tip surface 33a that engages with the doorway 19 when the elastic protective cover 32 is retracted and prevents the entire elastic protective cover 32 from being sunk. It is also possible to leave the rear projection 38 with a warning mark for preventing excessive advancement at a portion located at the entrance 19 when the pin 16 is not used.

DESCRIPTION OF SYMBOLS 11 Test probe for measurement 12 Probe main body part 13 Front end 14 Rear end 15 Internal space 16 Contact pin 17 Outer surface 18 Opening part 19 Entrance / exit 20 Rotating gear 22 Cord 23 Inner code part 32 Elastic protection cover 32a Surface 33 Front end part 33a Front end face 34 Rear end 35 Engagement groove 36 Surrounding space 37 Front projection 38 Rear projection

Claims (3)

A probe body portion is protruded contact pins from the distal end, the instrument in the inner space and the other end led out from the rear end side of the probe main body through the probe body portion by connecting one end to the contact pin A test probe for a measuring instrument comprising at least a cord having a plug to be inserted into the input terminal of
The probe main body includes a rotary gear that is supported by an artificial rotation operation in a direction orthogonal to the axial direction by projecting a part from an appropriate position on the outer surface of the probe main body , and the rotation and an elastic protective cover which is movably disposed a helically around the code portion in the engagement groove gear meshes have a front surface located within said interior space, said at suitable position of the tip-sided With an elastic protection cover and an entrance allowing entry and exit when moving forward and backward,
The contact pins when used is to allow the elastic retraction of the protective cover of the rotary gear to a position where the facing tip surface of the elastic protective cover to the doorway by rotating in one direction,
A test probe for a measuring instrument, wherein when the contact pin is not used, the elastic protective cover can be advanced to a position covering the entire contact pin by rotating the rotary gear in the other direction. The elastic protective cover, the meter test probe according to claim 1 comprising a front projection that prevents the said entrance and engaged to entire upon retracting it is retracted into the tip surface. The elastic protective cover, according to claim 1 or 2 comprising the rear end of the rear projection is the meshing groove when covering the whole of the contact pin is advanced it is prevented from meshing with the rotary gear Test probe for measuring instruments.

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