JP7013952B2 - Terminal structure, terminal block, combination - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Law 1. Release date November 29, 2017 2. Public location System Control Fair (SCF) 2017 / Measurement Exhibition 2017 TOKYO Tokyo Big Sight 3-11-1, Ariake, Koto-ku, Tokyo 3. Publisher Patrite Co., Ltd.

The present invention relates to a terminal structure for holding a lead wire, a terminal block having a terminal structure, and a combination having a lead wire and a terminal structure.

A terminal structure that holds a conductor by inserting the conductor is known. The terminal structure has a connecting conductor that can come into contact with a lead wire inserted inside the terminal structure. That is, the terminal structure can hold the inserted conductor while electrically connecting the inserted conductor and the connecting conductor.

In such a terminal structure, the conductor and the connecting conductor may not be properly connected unless the conductor is inserted to a predetermined connection position of the terminal structure. Therefore, it is required to confirm that the conducting wire is inserted to a predetermined connection position.

However, the inside of the terminal structure is shielded from the outside due to electrical insulation, and cannot be visually recognized from the outside. Therefore, it is not possible to directly visually confirm the connection between the conducting wire and the connecting conductor. Therefore, a method of confirming the contact between the conducting wire and the connecting conductor has been considered by the response that the conducting wire comes into contact with the connecting conductor when the conducting wire is inserted into the terminal structure. However, the lead wire may come into contact with a member other than the connecting conductor inside the terminal structure to obtain the same response. In such a case, it is not possible to reliably secure the connection between the conducting wire and the connecting conductor. That is, the connection between the conducting wire and the connecting conductor can only be confirmed uncertainly.

Therefore, it has been considered to provide a display component in the terminal structure as in Patent Document 1. In the terminal structure of Patent Document 1, the display component is not observed from the outside when the conductor is not inserted into the terminal structure, but when the conductor is inserted into the terminal structure to a predetermined connection position, it is provided inside the terminal structure. The display component is moved by the mechanism, and the display component can be observed from the outside. According to such a terminal structure, it is possible to visually confirm from the outside of the terminal structure whether or not the conducting wire is inserted to a predetermined connection position.

Japanese Unexamined Patent Publication No. 2017-54795

However, in the terminal structure of Patent Document 1, the display component is moved according to the degree of insertion of the conducting wire into the terminal structure. Therefore, when the conductor is inserted into the terminal structure to a certain position, the display component may be observed from the outside even though the conductor is not inserted to a predetermined connection position. Therefore, it can only be confirmed with certainty whether the conductor is inserted to a predetermined connection position.

The present invention has been made in consideration of such a point, and provides a terminal structure capable of visually confirming that a conducting wire is inserted to a predetermined connection position from the outside. The purpose.

The terminal structure of the present invention is
A terminal structure for holding a conducting wire provided with a ferrule including a conductive portion located at an end and an insulating portion connected to the conductive portion.
A housing having a peripheral wall portion defining an accommodation hole portion in which the insulation portion of the ferrule is accommodated, and a housing having a peripheral wall portion.
With a connecting conductor provided in the housing,
A notch is provided in the peripheral wall portion.
With the ferrule being arranged in the accommodating hole so as to be in a predetermined position, the conductive portion of the ferrule is electrically connected to the connecting conductor, and the ferrule is interposed through the notch. It is visible from the outside.

In the terminal structure of the present invention, the notch portion may extend from the opening of the accommodation hole portion in the insertion direction of the ferrule into the accommodation hole portion.

In the terminal structure of the present invention
The housing has a confirmation surface that extends in a direction non-parallel to the insertion direction of the ferrule into the accommodation hole.
The confirmation surface may be connected to the peripheral wall portion via the notch portion in the intermediate portion of the accommodating hole portion along the insertion direction.

In the terminal structure of the present invention
The housing has a confirmation hole portion that leads to the accommodating hole portion via the notch portion.
A part of the surface for partitioning the confirmation hole portion may be the confirmation surface.

In the terminal structure of the present invention
The housing has a boundary wall portion located between the accommodation hole portion and the confirmation hole portion.
The peripheral wall portion and the boundary wall portion may accommodate a part of the mark tube provided in the conducting wire in the accommodating hole portion to hold the mark tube.

The terminal block of the present invention includes any of the terminal structures described above.

The combination of the present invention is
Conductors with ferrules and
It comprises any of the terminal structures described above.

According to the present invention, it is possible to visually confirm from the outside that the conducting wire is inserted to a predetermined connection position of the terminal structure.

FIG. 1A is a diagram schematically showing a terminal block having a terminal structure, and is a diagram showing a state before a conducting wire is inserted into the terminal structure. FIG. 1B is a diagram schematically showing a terminal block having a terminal structure, and is a diagram showing a state in which a conducting wire and a ferrule are inserted into the terminal structure. FIG. 1C is a diagram schematically showing a terminal block having a terminal structure, and is a diagram showing a state in which a conducting wire, a ferrule, and a mark tube are inserted into the terminal structure. FIG. 2 is a diagram showing a ferrule provided on a conducting wire. FIG. 3 is an enlarged view showing the terminal structure of the terminal block shown in FIG. 1A. FIG. 4 is an enlarged view showing the terminal structure of the terminal block shown in FIG. 1B. FIG. 5 is a diagram showing a part of the terminal structure of FIG. FIG. 6 is a diagram showing a state in which the mark tube is fixed.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, the scale, aspect ratio, etc. may be appropriately changed from those of the actual product and exaggerated for the convenience of illustration and comprehension.

In addition, the terms such as "parallel", "orthogonal", and "identical" and the values of length and angle, etc., which specify the shape and geometric conditions and their degrees as used in the present specification, are strictly referred to. Without being bound by the meaning, we will interpret it including the range where similar functions can be expected.

1A to 6 are views for explaining an embodiment of a terminal structure according to the present invention. As an example, FIGS. 1A to 1C schematically show a terminal block (electrical connection device) having three terminal structures. The terminal block shown in FIGS. 1A to 1C is a so-called screwless terminal block capable of fixing a lead wire inserted into the terminal structure without using a separate fixing member such as a screw. Such terminal blocks are often used by being connected and fixed to a rail or the like in a state where a plurality of such terminal blocks are stacked.

The terminal block 5 shown in FIGS. 1A to 1C has a plurality of terminal structures 10. The terminal block 5 can electrically connect each conductor 31 by inserting the held body 30 including the conductor 31 into each terminal structure 10 to a predetermined connection position. 1A to 1C show in order the process of inserting the conductor 31 (held body 30) into the terminal structure 10. FIG. 1A shows a terminal block 5 before inserting the lead wire 31 into the terminal structure 10. FIG. 1B shows a terminal block 5 in which a conductor 31 and a ferrule 40 provided on the conductor 31 are inserted into one terminal structure 10. FIG. 1C shows a terminal block 5 in which a conductor 31 and a ferrule 40 and a mark tube 35 provided on the conductor 31 are inserted into one terminal structure 10. The terminal structure 10 inserts and holds the conductor 31 to form a combination 1 of the conductor 31 and the terminal structure 10. That is, the combination 1 has a conducting wire 31 and a terminal structure 10. Hereinafter, the conductor 31 and the terminal structure 10 will be described.

The conductor 31 is used, for example, to electrically connect two electronic components. The conductor 31 is formed of a metal wire and an insulator. The metal wire is covered with an insulator, but the metal wire is not covered with an insulator at both ends of the lead wire 31. By connecting to other electronic components or the like at both ends of the conducting wire 31, the two electronic components or the like can be electrically connected. The conductor 31 is provided with a ferrule 40 and a mark tube 35. Then, the held body 30 including the lead wire 31, the ferrule 40, and the mark tube 35 is held by the terminal structure 10.

The ferrule 40 can bundle metal wires that are not coated with an insulator at the end of the conductor 31 to facilitate the handling of the conductor 31. FIG. 2 shows an enlarged ferrule 40 provided on the conductor 31. As shown in FIGS. 1A and 2, the ferrule 40 includes a conductive portion 41 located at the end of the conducting wire 31 and an insulating portion 42 connected to the conductive portion 41. The conductive portion 41 has a tubular shape, and is crimped so as to be electrically connected to a metal wire which is not covered with an insulator of the conducting wire 31 inside the tubular shape. The insulating portion 42 includes a frustum cylinder portion 44 connected to the conductive portion 41 and a cylinder portion 43 connected to the frustum cylinder portion 44. That is, the cylinder portion 43 is indirectly connected to the conductive portion 41 via the frustum cylinder portion 44. In the example shown in FIG. 2, the frustum cylinder portion 44 has a truncated cone shape. The tubular portion 43 has a cylindrical shape having a larger hole diameter than the conductive portion 41. Therefore, the frustum cylinder portion 44 has a larger hole diameter on the cylinder portion 43 side than on the conductive portion 41 side. The end face of the frustum 43 opposite to the side connected to the frustum cylinder 44 is the end face 45 opposite to the conductive portion 41 of the ferrule 40. The ferrule 40 has, for example, an overall length of 14 mm, a length of the conductive portion 41 of 8 mm, a length of the insulating portion 42 of 6 mm, a hole diameter of the conductive portion 41 of 1.5 mm, and a hole diameter of the tubular portion 43 of 3 mm. be.

The mark tube 35 is an identification piece for preventing the lead wire 31 from being inserted into the terminal structure 10 by mistake when the lead wire 31 is inserted into the terminal structure 10 of the terminal block 5, for example, the connection of the lead wire 31. Characters, numbers, symbols, etc. indicating the destination are displayed. The mark tube 35 is made of a flexible material such as nylon. The mark tube 35 has a cylindrical shape, for example, has a hole diameter of 3.6 mm and a length of 20 mm.

The terminal structure 10 holds the inserted lead wire 31 (held body 30). 3 and 4 are enlarged views showing one of the terminal structures 10 of the terminal block 5, and FIG. 3 is a diagram showing a state in which the conducting wire 31 is not inserted into the terminal structure 10 shown in FIG. 1A. 4 shows a state in which the conducting wire 31 is inserted into the terminal structure 10 shown in FIG. 1B, respectively. As is well shown in FIGS. 3 and 4, the terminal structure 10 includes a housing 20, a connecting conductor 11, a holding member 13, and a releasing member 15.

In the illustrated example, one terminal block 5 includes three terminal structures 10. The housings 20 of the three terminal structures 10 are integrally formed with each other. Further, the three connecting conductors 11 included in one terminal block 5 are electrically connected to each other. Therefore, the lead wires 31 held in the three terminal structures 10 included in the one terminal block 5 are electrically connected to each other.

The housing 20 is appropriately provided with protrusions and grooves so that the connecting conductor 11 and the holding member 13 can be provided. The housing 20 is made of an insulating material such as nylon for electrical insulation from the outside. In the illustrated example, the housing 20 has a substantially rectangular parallelepiped shape, for example, a width of 4 mm, a length of 60 mm, and a height of 32 mm. As shown in FIGS. 3 and 4, the housing 20 has a peripheral wall portion 22, an accommodation space 24, a confirmation surface 25, a confirmation hole portion 26, and a boundary wall portion 28. .. Further, the peripheral wall portion 22 defines the accommodating hole portion 21.

As shown in FIG. 1A and the like, the accommodation hole portion 21 and the accommodation space 24 are open on one main surface 20a side of the substantially rectangular parallelepiped housing 20. However, it is assumed that a plurality of the terminal blocks 5 are arranged so that the main surfaces 20a of the substantially rectangular parallelepiped housing 20 overlap each other when used. Therefore, in actual use, the positions of the conductor 31 and the ferrule 40 in the accommodation hole 21 and the accommodation space 24 cannot be observed from the side of one main surface 20a of the housing 20.

As shown in FIG. 4, the accommodating hole 21 accommodates the insulating portion 42 of the ferrule 40 with the conducting wire 31 inserted into the terminal structure 10. The accommodating hole 21 is a substantially cylindrical space extending in the insertion direction of the conducting wire 31, in other words, the insertion direction d1 of the ferrule 40. The depth of the accommodating hole 21, in other words, the length of the accommodating hole 21 in the extending direction d1 is, for example, 9 mm. As shown in FIG. 3, both ends of the accommodating hole 21 are a first opening 21a and a second opening 21b. The accommodating hole 21 communicates with the outside of the terminal structure 10 via the first opening 21a, and communicates with the accommodating space 24 via the second opening 21b. The hole diameter of the first opening 21a is, for example, 3.5 mm, and the hole diameter of the second opening 21b is, for example, 2 mm.

The peripheral wall portion 22 extends in the insertion direction d1 of the ferrule 40 into the accommodation hole portion 21 so as to define the accommodation hole portion 21. As shown in FIG. 3, the peripheral wall portion 22 around the second opening 21b includes a mortar-shaped slope corresponding to the shape of the frustum cylinder portion 44 of the insulating portion 42 of the ferrule 40. Further, the peripheral wall portion 22 is provided with a notch portion 23. The notch 23 is provided with a ferrule 40 housed in the accommodation hole 21, particularly an end surface 45 on the opposite side of the conductive portion 41 of the ferrule 40 so as to be visible from the outside. The notch 23 extends from the first opening 21a of the accommodation hole 21 in the insertion direction d1 of the ferrule 40 into the accommodation hole 21. Therefore, it is possible to confirm to what extent the conducting wire 31 and the ferrule 40 are inserted into the accommodating hole portion 21 through the notch portion 23.

As shown in FIG. 4, the accommodating space 24 accommodates the conductive portion 41 of the ferrule 40 with the conducting wire 31 inserted in the terminal structure 10. Further, the accommodation space 24 accommodates the connecting conductor 11 and the holding member 13. In the accommodation space 24, the connecting conductor 11 comes into contact with the conductive portion 41 by the holding member 13 and is electrically connected to the conductive portion 41.

The confirmation surface 25 is a surface that extends in a direction non-parallel to the insertion direction d1 of the ferrule 40 into the accommodation hole portion 21, and is preferably a plane that extends in a direction orthogonal to the insertion direction d1 of the ferrule 40 into the accommodation hole portion 21. be. FIG. 5 is a diagram near the confirmation surface 25 of the terminal structure 10 of FIG. As is well shown in FIG. 5, the confirmation surface 25 is connected to the peripheral wall portion 22 via the notch portion 23 at the intermediate portion along the insertion direction d1 of the ferrule 40 into the accommodating hole portion 21. Here, the intermediate portion along the insertion direction d1 of the ferrule 40 into the accommodating hole 21 means a part between the first opening 21a and the second opening 21b at both ends of the accommodating hole 21. The confirmation surface 25 is visible from the outside through the notch 23. The confirmation surface 25 is provided to confirm that the conducting wire 31 is inserted into the terminal structure 10 up to a predetermined connection position where the conducting wire 31 is electrically connected to the connecting conductor 11. Further, the confirmation surface 25 has a sufficient width so that the position of the conducting wire 31 can be easily confirmed.

The confirmation hole portion 26 is provided adjacent to the accommodating hole portion 21 and leads to the accommodating hole portion 21 via the notch portion 23. In the example shown in FIG. 5, the bottom surface, which is a part of the surface for partitioning the confirmation hole portion 26, is the confirmation surface 25. The confirmation hole 26 is provided so that the position of the confirmation surface 25 can be easily visually recognized. The confirmation surface 25 can be visually recognized from the outside through the confirmation hole portion 26. The hole diameter of the confirmation hole portion 26 is, for example, 3 mm, and the depth of the confirmation hole portion 26 is, for example, 2 mm.

The boundary wall portion 28 is located between the accommodating hole portion 21 and the confirmation hole portion 26. As shown in FIG. 6, the boundary wall portion 28 is deformed so that a part of the mark tube 35 provided in the conducting wire 31 can be fixed to the accommodating hole portion 21, and is aligned with the peripheral wall portion 22. A part of the mark tube 35 is inserted into the accommodating hole 21 and held. In other words, a part of the mark tube 35 is inserted so as to be inscribed in the accommodating hole portion 21, and the other portion of the mark tube 35 is sandwiched between the peripheral wall portion 22 and the boundary wall portion 28, whereby the mark tube is formed. 35 is held in the housing 20. The boundary wall portion 28 extends for a length of, for example, 0.7 mm between the accommodating hole portion 21 and the confirmation hole portion 26.

As is well shown in FIGS. 3 and 4, the connecting conductor 11 is provided in the accommodation space 24 of the housing 20 and comes into contact with the conductive portion 41 of the ferrule 40 of the conducting wire 31 inserted into the terminal structure 10. It comes to be electrically connected to the conductive portion 41. The connecting conductor 11 is electrically connected to a connecting conductor having another terminal structure. Therefore, the conducting wire 31 inserted into the terminal structure 10 is electrically connected to the conducting wire inserted into the other terminal structure via the connecting conductor 11. The connecting conductor 11 is, for example, a plate-shaped metal.

The holding member 13 holds the conducting wire 31 inserted in the terminal structure 10 in a state of being electrically connected to the connecting conductor 11. The holding member 13 is, for example, an elastic body, and in the illustrated example, it is a spring formed by bending a strip-shaped thin metal plate into a substantially U-shape. As shown in FIG. 3, in a state where the ferrule 40 provided in the conductor 31 is not accommodated in the accommodation space 24 of the housing 20, the holding member 13 extends to a position where the ferrule 40 is accommodated. As shown in FIG. 4, when the ferrule 40 provided in the conducting wire 31 is accommodated in the accommodation space 24 of the housing 20, the holding member 13 is deformed by the ferrule 40. The ferrule 40 is pressed toward the connecting conductor 11 by the elastic force of the holding member 13 due to the deformation. In this way, the ferrule 40 is sandwiched between the connecting conductor 11 and the holding member 13, so that the terminal structure 10 can hold the conducting wire 31.

The release member 15 is a member for releasing the holding of the conductor 31 (held body 30) of the terminal structure 10, and various forms for releasing the holding of the conductor 31 by the holding member 13 can be adopted. .. In the illustrated example, the release member 15 operates with the deformation of the holding member 13. The release member 15 includes a pressing portion 15a to which a pressing force as an operating force is input from the outside, and a contact portion 15b connected to the pressing portion 15a and in contact with the holding member 13. When the lead wire 31 is not inserted into the terminal structure 10, most of the pressing portion 15a of the release member 15 protrudes from the housing 20 as shown in FIGS. 1A and 3. In the state where the conducting wire 31 is inserted into the terminal structure 10, as shown in FIGS. 1B and 4, the contact portion 15b moves due to the deformation of the holding member 13, and the pressing portion 15a becomes large as the contact portion 15b moves. The portion is housed in the housing 20. A part of the holding member 13 in which the contact portion 15b is in contact with the contact portion 15b by further pushing the pressing portion 15a of the release member 15 into the housing 20 while the conducting wire 31 is inserted into the terminal structure 10. Pushed down with. As a result, the holding (pinching) of the conducting wire 31 between the holding member 13 and the connecting conductor 11 can be released. Further, in order to avoid an increase in the size of the terminal structure 10, it is preferable that the pressing portion 15a of the release member 15 is provided in the confirmation hole portion 26 of the housing 20.

Next, the operation in which the conductor 31 (held body 30) is inserted into the terminal structure 10 and the terminal structure 10 holds the conductor 31 will be described.

First, as shown in FIGS. 1A and 3, the ferrule 40 provided at the end of the conducting wire 31 is inserted into the accommodating hole 21 of the housing 20 from the first opening 21a. Next, as shown in FIGS. 1B and 4, the conductive portion 41 of the ferrule 40 passes through the second opening 21b and is accommodated in the accommodation space 24, and the insulating portion 42 of the ferrule 40 is accommodated in the accommodation hole portion 21. Be housed. After that, as shown in FIGS. 1C and 6, the mark tube 35 is inserted into the accommodating hole 21 and fixed.

In a state where the insulating portion 42 of the ferrule 40 is accommodated in the accommodating hole portion 21, the peripheral wall portion 22 which is a mortar-shaped slope around the second opening portion 21b and the frustum cylinder portion 44 of the insulating portion 42 are Since it has a corresponding shape, it can be fitted. As a result, the conductive portion 41 of the ferrule 40 can be appropriately guided to a position where it can be connected to the connecting conductor 11 of the accommodation space 24.

As is well shown in FIG. 4, the accommodating conductive portion 41 of the accommodating space 24 deforms the holding member 13 provided in the accommodating space 24. Then, the conductive portion 41 extends between the tip of the holding member 13 and the connecting conductor 11. The conductive portion 41 is pressed toward the connecting conductor 11 by the elastic force due to the deformation of the holding member 13. The conductive portion 41 is sandwiched between the connecting conductor 11 and the holding member 13, and is held in a state of being electrically connected to the connecting conductor 11 by the holding member 13.

By operating the releasing member 15 for the conducting wire 31 held via the conductive portion 41, the holding of the conducting wire 31 by the holding member 13 can be released. In the illustrated example, when the pressing portion 15a of the releasing member 15 is pushed, the contact portion 15b is pushed down, and the holding of the conducting wire 31 by the holding member 13 is released. By releasing the holding of the conductor 31 by the holding member 13, the conductor 31 can be easily pulled out from the terminal structure 10.

By the way, as described above, in the conventional terminal structure, it can only be confirmed from the outside that the conducting wire is inserted up to the connection position where the conducting wire is connected to the connecting conductor. On the other hand, in the terminal structure 10 of the present embodiment, it is possible to visually confirm from the outside that the conducting wire 31 (held body 30) is inserted to a predetermined connection position. Hereinafter, a method for confirming that the conducting wire 31 is inserted to a predetermined connection position in the terminal structure 10 of the present embodiment will be described.

When the conducting wire 31 is inserted to a predetermined connection position of the terminal structure 10, the conductive portion 41 of the ferrule 40 is appropriately accommodated in a position where it can be electrically connected to the connecting conductor 11 of the accommodation space 24. On the other hand, the insulating portion 42 of the ferrule 40 is accommodated in the accommodating hole portion 21. The conductive portion 41 and the insulating portion 42 of the ferrule 40 are connected to each other. Therefore, the insulating portion 42 of the ferrule 40 is inserted to a predetermined position, and more specifically, as shown in FIG. 5, the end surface 45 opposite to the side of the conductive portion 41 of the ferrule 40 is inserted to a predetermined position. By confirming that the lead wire 31 is inserted, it can be confirmed that the lead wire 31 is inserted to a predetermined connection position of the terminal structure 10. That is, the conducting wire 31 is inserted to the predetermined connection position by visually confirming from the outside that the end surface 45 on the side opposite to the side of the conductive portion 41 of the ferrule 40 is inserted to the predetermined position. This can be visually confirmed from the outside.

The end surface 45 on the side opposite to the side of the conductive portion 41 of the ferrule 40 can be visually recognized from the outside through the notch portion 23 provided in the peripheral wall portion 22 defining the accommodating hole portion 21. In particular, since the notch 23 extends from the first opening 21a of the accommodation hole 21 in the insertion direction d1 of the ferrule 40 into the accommodation hole 21, the insertion direction d1 of the end surface 45 is passed through the notch 23. The position in can be easily visually recognized.

Further, the predetermined position where the end face 45 should be located when the conducting wire 31 (held body 30) is inserted to a predetermined connection position is set based on, for example, a mark provided on the peripheral wall portion 22. May be good. Further, the predetermined position where the end surface 45 should be positioned when the conductor 31 is inserted to the predetermined connection position is defined with reference to the confirmation surface 25 connected to the peripheral wall portion 22 via the notch portion 23. Is preferable. Since the confirmation surface 25 can be visually recognized from the outside through the notch 23 and the confirmation hole 26, if the confirmation surface 25 is specified as a reference, it is easy and reliable that the end surface 45 is inserted to a predetermined position. Can be confirmed at. For example, when the end surface 45 is the same surface as the confirmation surface 25, and if the end surface 45 on the opposite side of the conductive portion 41 of the ferrule 40 is inserted to a predetermined position, it is visually visible from the outside. Can be confirmed easily and reliably. Further, if the confirmation surface 25 is a plane extending in a direction orthogonal to the insertion direction d1 of the ferrule 40 into the accommodating hole 21, the confirmation surface 25 and the end surface 45 of the ferrule 40 are continuous planes, so that the end surface 45 is confirmed. It can be more easily and surely confirmed that the surface is the same as the surface 25.

That is, the conductive portion 41 of the ferrule 40 is electrically connected to the connecting conductor 11 in a state where the end surface 45 on the side opposite to the side of the conductive portion 41 of the ferrule 40 is arranged at a predetermined position. When the end surface 45 on the side opposite to the side of the conductive portion 41 of the ferrule 40 is visible from the outside through the notch portion 23, it is visually recognized from the outside that the conducting wire 31 is inserted to a predetermined connection position. Can be easily confirmed.

Further, in the terminal structure 10 of the above-described embodiment, as compared with the terminal structure described in Patent Document 1, it is not necessary to provide a mechanism for confirmation, so that the lead wire 31 is connected to a predetermined position at low cost and in a small space. It can be visually confirmed from the outside that it has been inserted to the position.

Further, in the terminal structure 10 of the above-described embodiment, when the conductor 31 is not inserted into the terminal structure 10, most of the pressing portion 15a of the release member 15 protrudes from the housing 20, and the conductor 31 is the terminal structure 10. In the state of being inserted into the housing 20, most of the pressing portion 15a of the release member 15 is housed in the housing 20. Therefore, in a state where the conductor 31 is not inserted into the terminal structure 10, the conductor 31 can be appropriately inserted into the accommodating hole 21 without being erroneously inserted into the confirmation hole 26. Further, in the state where the conducting wire 31 is inserted into the terminal structure 10, the position of the end surface 45 of the ferrule 40 in the insertion direction d1 can be easily confirmed via the confirmation hole portion 26.

Further, the peripheral wall portion 22 and the boundary wall portion 28 are formed by deforming a part of the mark tube 35 provided in the conducting wire 31 so as to be fixed to the accommodating hole portion 21 and inserting the mark tube portion 21 into the accommodating hole portion 21. The mark tube 35 can be held. By fixing and holding the mark tube 35 in the vicinity of the housing 20, it is possible to prevent the mark tube 35 from moving and easily confirm the symbol or the like displayed on the mark tube 35 in the vicinity of the housing 20. can. That is, it is possible to effectively prevent the lead wire 31 from being inserted into the wrong terminal structure 10. As shown in FIG. 6, the mark tube 35 is provided not only in the peripheral wall portion 22 and the boundary wall portion 28, but also in the accommodating hole portion together with the housings of other terminal structures provided adjacent to each other. On the other hand, it may be fixed and accommodated.

As described above, the terminal structure 10 of the present embodiment is a terminal structure that holds the conducting wire 31 provided with the ferrule 40 including the conductive portion 41 located at the end portion and the insulating portion 42 connected to the conductive portion 41. A peripheral wall portion 22 having a peripheral wall portion 22 defining an accommodation hole portion 21 in which the insulating portion 42 of the ferrule 40 is accommodated is provided, and a housing 20 having a housing 20 and a connecting conductor 11 provided in the housing 20 are provided. A notch 23 is provided in the portion 22, and the conductive portion 41 of the ferrule 40 is electrically connected to the connecting conductor 11 in a state where the ferrule 40 is arranged in the accommodating hole portion 21 so as to be in a predetermined position. Moreover, the ferrule 40 is visible from the outside through the notch 23. According to such a terminal structure 10, it is possible to visually confirm from the outside that the end face 45 on the opposite side of the ferrule 40, particularly the conductive portion 41 of the ferrule 40, is inserted to a predetermined position. It can be visually confirmed from the outside that the conducting wire 31 (held body 30) is inserted to a predetermined connection position.

Further, in the terminal structure 10 of the present embodiment, the notch portion 23 extends from the first opening portion 21a of the accommodating hole portion 21 in the insertion direction d1 of the ferrule 40 into the accommodating hole portion 21. According to such a terminal structure 10, the position of the end surface 45 on the opposite side of the conductive portion 41 of the ferrule 40 along the insertion direction d1 can be easily visually recognized via the notch portion 23. Therefore, it can be easily visually confirmed from the outside that the conducting wire 31 (held body 30) is inserted to a predetermined connection position.

Further, in the terminal structure 10 of the present embodiment, the housing 20 has a confirmation surface 25 extending in a direction non-parallel to the insertion direction d1 of the ferrule 40 into the accommodation hole 21, and the confirmation surface 25 is in the insertion direction. It is connected to the peripheral wall portion 22 via the notch portion 23 in the intermediate portion of the accommodating hole portion 21 along d1. According to such a terminal structure 10, it is possible to easily and surely confirm that the end surface 45 is inserted to a predetermined position with the confirmation surface 25 as a reference. Therefore, it is possible to easily and surely visually confirm from the outside that the conducting wire 31 (held body 30) is inserted to a predetermined connection position.

Further, in the terminal structure 10 of the present embodiment, the housing 20 has a confirmation hole portion 26 leading to the accommodating hole portion 21 via the notch portion 23, and a part of the surface for partitioning the confirmation hole portion 26 is provided. It is a confirmation surface 25. According to such a terminal structure 10, the confirmation surface 25 can be visually recognized from the outside through the confirmation hole portion 26. Therefore, it is possible to more easily and surely visually confirm from the outside that the conducting wire 31 (held body 30) is inserted to a predetermined connection position.

Further, in the terminal structure 10 of the present embodiment, the housing 20 has a boundary wall portion 28 located between the accommodating hole portion 21 and the confirmation hole portion 26, and the peripheral wall portion 22 and the boundary wall portion 28 have a boundary wall portion 28. A part of the mark tube 35 provided in the conducting wire 31 is accommodated in the accommodating hole 21 to hold the mark tube 35. According to such a terminal structure 10, it is possible to prevent the mark tube 35 from moving and easily confirm the symbol or the like displayed on the mark tube 35 in the vicinity of the housing 20. Therefore, it is possible to effectively prevent the lead wire 31 (held body 30) from being inserted into the erroneous terminal structure 10.

In the above-described embodiment, the terminal structure 10 is applied to the terminal block 5, but the terminal structure 10 is not limited to the terminal block 5. The terminal structure 10 may be applied to any device (eg, switch or measuring instrument) into which the conductor 31 provided with the ferrule 40 is inserted and held. In this case, the lead wire 31 inserted into the terminal structure 10 may be electrically connected to, for example, an electronic component inside an apparatus having the terminal structure 10.

Aspects of the present invention are not limited to the above-described embodiments, but include various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the above-mentioned contents. That is, various additions, changes and partial deletions are possible without departing from the conceptual idea and purpose of the present invention derived from the contents defined in the claims and their equivalents.

1 Combination 5 Terminal block 10 Terminal structure 11 Connecting conductor 13 Holding member 15 Release member 20 Housing 21 Housing hole 21a First opening 21b Second opening 22 Peripheral wall 23 Notch 24 Storage space 25 Confirmation surface 26 Confirmation hole 28 Boundary wall 30 Held body 31 Conductor 35 Mark tube 40 Ferrule 41 Conductive part 42 Insulation part 43 Cylinder part 44 Cone base Cylinder part 45 End face

Claims (5)

A terminal structure for holding a conducting wire provided with a ferrule including a conductive portion located at an end and an insulating portion connected to the conductive portion.
A housing having a peripheral wall portion defining a storage hole portion in which the insulating portion of the ferrule is housed, and a connecting conductor provided in the housing are provided.
A notch is provided in the peripheral wall portion.
With the ferrule being arranged in the accommodating hole so as to be in a predetermined position, the conductive portion of the ferrule is electrically connected to the connecting conductor, and the ferrule is interposed through the notch. Can be seen from the outside
The housing has a confirmation surface that extends in a direction non-parallel to the insertion direction of the ferrule into the accommodation hole.
The confirmation surface is connected to the peripheral wall portion via the notch portion at the intermediate portion of the accommodating hole portion along the insertion direction.
The housing has a confirmation hole portion that leads to the accommodating hole portion via the notch portion.
A terminal structure in which a part of the surface for partitioning the confirmation hole portion is the confirmation surface . The terminal structure according to claim 1, wherein the notch extends from the opening of the accommodation hole in the direction in which the ferrule is inserted into the accommodation hole. The housing has a boundary wall portion located between the accommodation hole portion and the confirmation hole portion.
The terminal structure according to claim 1 or 2 , wherein the peripheral wall portion and the boundary wall portion accommodate a part of a mark tube provided in the conducting wire in the accommodating hole portion to hold the mark tube. A terminal block having the terminal structure according to any one of claims 1 to 3 . Conductors with ferrules and
A combination comprising the terminal structure according to any one of claims 1 to 3 .

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