WO2022185667A1

WO2022185667A1 - Attachment for terminal block, and terminal block

Info

Publication number: WO2022185667A1
Application number: PCT/JP2021/046757
Authority: WO
Inventors: 正人植田
Original assignee: オムロン株式会社
Priority date: 2021-03-01
Filing date: 2021-12-17
Publication date: 2022-09-09
Also published as: JP2022133066A

Abstract

The present invention simplifies, as necessary, the work of attaching/detaching an electric wire, and enhances usability of an existing terminal block comprising a screw-type terminal fitting. An electric wire insertion hole (38h) is formed in an attachment housing (38) having an insulative property. An attachment terminal (42) includes: a contact part (42c) which is disposed on the inner side of the attachment housing (38) and contacts a terminal (40a) of an electric wire (40); and an engaging part (42e) which protrudes from the attachment housing (38) and engages with a screw part (24). The inner side of the attachment housing (38) is provided with a leaf spring member (44) which holds the terminal (40a) of the electric wire (40) through cooperation with the contact part (42c) of the attachment terminal (42) by elastic restoring force.

Description

Terminal block attachments and terminal blocks

The present invention relates to a terminal block attachment for converting a screw type terminal fitting of a terminal block into a push-in type terminal fitting.

Terminal blocks are broadly classified into types with multiple screw terminal fittings and types with multiple push-in terminal fittings. A screw-type terminal fitting connects a terminal of an electric wire to the screw-type terminal fitting by utilizing the tightening force of a threaded portion of a connection bolt or the like. By tightening or loosening the screw portion, the electric wire is attached to or detached from the screw-type terminal fitting (see Patent Document 1). The latter type of terminal block utilizes the elastic restoring force of a plate spring member provided inside the housing to connect the terminal of the electric wire to the push-in terminal fitting. By inserting and removing the electric wire from the housing, the terminal of the electric wire is attached to and detached from the push-in terminal fitting (see Patent Document 2).

Japanese Patent Application Laid-Open No. 2017-45563 Japanese Patent Application Laid-Open No. 2019-96470

Compared to the latter type of terminal block, the former type of terminal block can make the connection state of the electric wire terminals stronger and more stable due to the tightening force of the connection bolts and the like. On the other hand, the former type of terminal block requires more time and effort to attach and detach the electric wire than the latter type of terminal block. Therefore, in the former type of terminal block, for example, when the wire is frequently attached and detached such as in a confirmation test of the signal of the wire, the attachment and detachment work of the wire becomes complicated, and the usability (operability) of the terminal block is deteriorated. is a problem.

Accordingly, one aspect of the present invention aims to improve the usability of existing terminal blocks equipped with screw-type terminal fittings by simplifying the work of attaching and detaching electric wires as necessary.

In order to solve the above-described problems, a terminal block attachment according to an aspect of the present invention includes an insulating attachment housing formed with a wire insertion portion for inserting a wire, and an inner side of the attachment housing. and an attachment terminal having a contact portion that is arranged in the terminal block and that contacts the electric wire, and an engaging portion that engages with the threaded portion of the screw-type terminal fitting of the terminal block.

According to one aspect of the present invention, it is possible to simplify the attachment/detachment work of electric wires as necessary, and improve the usability of existing terminal blocks equipped with screw-type terminal fittings.

1 is a front view of an electronic device having a terminal block; FIG. It is a figure which shows a mode that the attachment for terminal blocks which concerns on Embodiment 1 was attached to the terminal block. 3 is a cross-sectional view taken along line III-III in FIG. 2; FIG. 1 is a perspective view of a terminal block attachment according to Embodiment 1. FIG. It is a top view of the attachment for terminal blocks shown in FIG. FIG. 5 is a side cross-sectional view of the terminal block attachment shown in FIG. 4 ; It is a figure which shows a mode that the attachment for terminal blocks which concerns on Embodiment 2 was attached to the terminal block. It is a perspective view of the attachment for terminal blocks which concerns on Embodiment 2. FIG. FIG. 9 is a side sectional view of the terminal block attachment shown in FIG. 8 ; It is a figure which shows a mode that the attachment for terminal blocks which concerns on Embodiment 3 was attached to the terminal block. It is a perspective view of the attachment for terminal blocks which concerns on Embodiment 3. FIG. It is a figure which shows a mode that the attachment for terminal blocks which concerns on Embodiment 4 was attached to the terminal block. It is a perspective view of the attachment for terminal blocks which concerns on Embodiment 4. FIG. FIG. 14 is a side cross-sectional view of the terminal block attachment shown in FIG. 13 ;

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in the drawings, the front side of the terminal block or the attachment for the terminal block is called the front side, and the rear side of the terminal block or the attachment for the terminal block is called the rear side. One side in the width direction of the terminal block or the attachment for the terminal block is called the left side, and the other side in the width direction of the terminal block or the attachment for the terminal block is called the right side. One side in the height direction of the terminal block or the attachment for the terminal block is called the upper side, and the other side in the height direction of the terminal block or the attachment for the terminal block is called the lower side.

[Embodiment 1]
One embodiment of the invention will now be described with reference to FIGS. FIG. 1 is a front view of an electronic device provided with a terminal block. FIG. 2 is a diagram showing how the terminal block attachment according to the first embodiment is attached to the terminal block. 3 is a cross-sectional view taken along line III-III in FIG. 2. FIG. 4 is a perspective view of the terminal block attachment according to the first embodiment. FIG. 5 is a plan view of the terminal block attachment shown in FIG. 4. FIG. 6 is a side sectional view of the terminal block attachment shown in FIG. 4. FIG.

§1 Configuration example (Terminal block configuration)
As shown in FIGS. 1 to 3, the terminal block 10 according to the first embodiment is detachably mounted on a box-shaped electronic device main body 14 of an electronic device 12 via a plurality of mounting bolts 16 . The electronic device 12 is, for example, an IO (Input Output) unit for configuring an FA (Factory Automation) network. The terminal block 10 includes a box-shaped terminal block body (terminal block case) 18 that can be attached to and detached from an electronic device body 14 via a plurality of mounting bolts 16 . A plurality of storage spaces 18s are formed in the terminal block main body 18. Although not shown, the storage spaces 18s are arranged in two rows in the vertical direction.

A plurality of screw-type terminal fittings 20 are provided on the terminal block body 18 , and each screw-type terminal fitting 20 is located at a position corresponding to each storage space 18 s of the terminal block body 18 . The plurality of screw-type terminal fittings 20 are arranged in two rows in the vertical direction in a zigzag manner, and the screw-type terminal fittings 20 in the lower row are positioned in front of the screw-type terminal fittings 20 in the upper row. ing. Each screw-type terminal fitting 20 has a fixing nut 22 provided at the front (entrance side) of each storage space 18s in the terminal block main body 18, and the fixing nut 22 cannot rotate with respect to the terminal block main body 18. is held in Each screw-type terminal fitting 20 has a connection bolt 24 as a threaded portion to be screwed into a fixing nut 22 and a washer 26 provided between the head of the connection bolt 24 and the fixing nut 22 . Each screw-type terminal fitting 20 has a conductive connection terminal 28 disposed in each storage space 18 s of the terminal block main body 18 . The connection terminal 28 extends rearward in a bifurcated shape and is made of a metal plate such as a copper plate, for example. The base end side (front end side) of the connection terminal 28 of each screw-type terminal fitting 20 is held between a washer 26 and a fixing nut 22 . A conductive pin 32 mounted on a substrate 30 is sandwiched between both ends of the connection terminal 28 of each screw-type terminal fitting 20 . Note that the substrate 30 is arranged inside the electronic device main body 14 .

Partition walls 34 are formed on the left and right sides of each screw-type terminal fitting 20 on the front surface of the terminal block main body 18 . Thereby, the insulation between the screw-type terminal fittings 20 adjacent to each other in the left-right direction can be ensured.

(Composition of attachment for terminal block)
As shown in FIGS. 2 and 4 to 6, the terminal block attachment 36 according to the first embodiment is an attachment for converting the selected screw type terminal fitting 20 into a push-in type terminal fitting. The terminal block attachment 36 has an insulating attachment housing 38, and the attachment housing 38 is made of resin or the like. A front portion of the attachment housing 38 is formed with a wire insertion hole 38h as a wire insertion portion into which a terminal 40a of the wire 40 is inserted. The terminal block attachment has an opening 38a on its rear side.

The terminal block attachment 36 has a conductive attachment terminal 42. The attachment terminal 42 is arranged inside the attachment housing 38 and has a contact portion 42c that contacts the terminal 40a of the electric wire 40. The attachment terminal 42 has an engaging portion 42e that engages with the connecting bolt from a direction orthogonal to the axial direction thereof. An engaging portion 42e of the attachment terminal 42 protrudes from the attachment housing 38 and is formed in a U shape. It has an intermediate portion 42m arranged inside the attachment housing 38 and connecting the contact portion 42c and the engaging portion 42e. The engaging portion 42e of the attachment terminal 42 may be formed in a Y shape instead of the U shape. The engaging portion 42e of the attachment terminal 42 may have a circular hole instead of being Y-shaped or U-shaped.

The terminal block attachment 36 includes a plate spring member 44 provided inside the attachment housing 38, and the plate spring member 44 contacts the contact portion 42c of the attachment terminal 42 by its elastic restoring force (elastic force). The terminal 40a of the electric wire 40 is clamped by cooperation. A tool insertion hole 38v as a tool insertion portion for inserting the tool 46 is formed in the front portion of the attachment housing 38 above the wire insertion hole 38h. The tool 46 is used to press the leaf spring member 44 to release the clamping state of the terminal 40a of the electric wire 40, as indicated by the phantom line in FIG.

As shown in FIGS. 5 and 6, the attachment terminal 42 and leaf spring member 44 are formed by bending a common conductive metal plate, such as a copper plate, multiple times. The contact portion 42c, the intermediate portion 42m, and the leaf spring member 44 of the attachment terminal 42 are press-fitted inside the attachment housing 38 through the opening 38a. The contact portion 42c of the attachment terminal 42 and the plate spring member 44 are in pressure contact with the inner surface 38f of the attachment housing 38. As shown in FIG. A plurality of locking protrusions 48 for locking the attachment terminals 42 are formed at the edge of the opening 38 a of the attachment housing 38 . The plurality of locking projections 48 prevent the attachment terminal 42 and the leaf spring member 44 from being separated from the attachment housing 38 . Note that the attachment terminal 42 and the leaf spring member 44 may be configured by individual metal plates instead of being configured by one common metal plate.

As shown in FIGS. 2 and 5, the width of the contact portion 42c and the intermediate portion 42m of the attachment terminal 42, in other words, the width of the portion of the attachment terminal 42 excluding the engaging portion 42e is larger than the width of the engaging portion 42e. set small. The width of the leaf spring member 44 is set smaller than the engagement portion 42 e of the attachment terminal 42 . As a result, the width of the contact portion 42 c , the intermediate portion 42 m of the attachment terminal 42 , and the width of the attachment housing 38 that houses the plate spring member 44 can be set to be approximately the same as the width of the engaging portion 42 e of the attachment terminal 42 . . That is, the terminal block 10 having the terminal block attachment 36 is configured such that the partition wall 34 and a part of the attachment housing 38 overlap with each other when viewed from the direction perpendicular to the partition wall 34 .

As shown in FIG. 6, the centerline 38hc of the wire insertion hole 38h of the attachment housing 38 is aligned along the engaging portion 42e and the intermediate portion 42m of the attachment terminal 42 (the centerline direction of the engaging portion 42e and the intermediate portion 42m). ). In other words, the center line 38hc of the wire insertion hole 38h of the attachment housing 38 is not parallel to the direction along the engaging portion 42e and the intermediate portion 42m of the attachment terminal 42. As shown in FIG. Therefore, the insertion/extraction direction of the terminal 40 a of the electric wire 40 with respect to the electric wire insertion hole 38 h of the attachment housing 38 can be parallel to the axial direction of the connection bolt 24 . As a result, the operator can insert and remove the terminal 40a of the electric wire 40 and rotate (tighten/loosen) the connection bolt 24 while maintaining the same posture (orientation) with respect to the terminal block 10 .

§2 Actions/Effects (Main Actions/Effects)
With a portion of the attachment housing 38 supported by the terminal block main body 18, the engagement portion 42e of the attachment terminal 42 is engaged with the connection bolt 24 from a direction perpendicular to the axial direction of the connection bolt 24, thereby tightening the connection bolt. Tighten 24. As a result, the terminal block attachment 36 can be attached to the terminal block 10 while the attachment terminal 42 and the connection bolt 24 are electrically connected, and the selected screw type terminal fitting 20 can be converted into a push-in type terminal fitting. can.

In particular, since the engagement portion 42e of the attachment terminal 42 is formed in a U-shape or a Y-shape, the engagement portion 42e of the attachment terminal 42 can be attached to the connection bolt 24 in a state in which the connection bolt 24 is loosened without being removed. can be engaged. This facilitates attachment of the terminal block attachment 36 to the terminal block 10 .

After that, by inserting the terminal 40a of the electric wire 40 into the attachment housing 38 from the electric wire insertion hole 38h, the terminal 40a of the electric wire 40 moves the leaf spring member 44 away from the contact portion 42c of the attachment terminal 42. , enters between the contact portion 42 c of the attachment terminal 42 and the plate spring member 44 . Then, the plate spring member 44 clamps the terminal 40a of the electric wire 40 by cooperating with the contact portion 42c of the attachment terminal 42 by elastic restoring force. As a result, the wire 40 can be attached to the screw-type terminal fitting 20 via the attachment housing 38 . The terminal 40a of the electric wire 40 is electrically connected to the screw-type terminal fitting 20 via the attachment terminal 42, and the terminal 40a of the electric wire 40 and the screw-type terminal fitting 20 can be electrically connected.

Also, by inserting the tool 46 into the attachment housing 38 from the tool insertion hole 38v, the tool 46 presses the plate spring member 44 to release the clamping state of the terminal 40a of the electric wire 40. As a result, the terminal 40a of the wire 40 can be easily pulled out of the attachment housing 38 from the wire insertion hole 38h. In other words, the wire 40 can be easily detached from the screw terminal fitting 20 .

According to the configuration of the terminal block attachment 36 according to the first embodiment, as described above, the selected screw type terminal fittings 20 in the existing terminal block 10 can be converted into push-in type terminal fittings. Therefore, according to the terminal block attachment 36 according to the first embodiment, the attachment/detachment work of the electric wire 40 can be simplified as necessary, and the usability (operability) of the existing terminal block 10 provided with a plurality of screw-type terminal fittings 20 can be improved. ) can be enhanced.

(Other functions and effects)
In the terminal block attachment 36 according to the first embodiment, as described above, the attachment terminal 42 and the plate spring member 44 are formed by bending a single common metal plate multiple times. Therefore, according to the terminal block attachment 36 according to the first embodiment, the number of parts of the terminal block attachment 36 can be reduced, and the configuration of the terminal block attachment 36 can be simplified.

In the terminal block attachment 36 according to the first embodiment, the locking projections 48 for locking the attachment terminals 42 are formed on the edges of the opening 38a of the attachment housing 38, as described above. Therefore, according to the terminal block attachment 36 according to the first embodiment, the attachment terminal 42 and the leaf spring member 44 can be easily attached to the attachment housing 38, and the assembling efficiency (assembling efficiency) of the terminal block attachment 36 is improved. be able to.

In the terminal block attachment 36 according to the first embodiment, when the engaging portion 42e of the attachment terminal 42 is engaged with the connection bolt 24, a portion of the attachment housing 38 is moved between the two partition walls 34 as described above. configured to enter the Therefore, according to the terminal block attachment 36 according to the first embodiment, sufficient insulation can be ensured between the attachment terminal 42 and the screw-type terminal fitting 20 adjacent thereto.

[Embodiment 2]
Another embodiment of the invention will now be described with reference to FIGS. FIG. 7 is a diagram showing how the terminal block attachment according to the second embodiment is attached to the terminal block. FIG. 8 is a perspective view of a terminal block attachment according to Embodiment 2. FIG. 9 is a side sectional view of the terminal block attachment shown in FIG. 8. FIG. For convenience of description, members having the same functions as the members described in the first embodiment are denoted by the same reference numerals, and description thereof will not be repeated.

As shown in FIGS. 7 to 9, the terminal block attachment 50 according to Embodiment 2 has the same configuration as the terminal block attachment 36 (see FIG. 6) according to Embodiment 1, except for the following points. there is In the terminal block attachment 50 , the attachment housing 38 has a cover portion 52 that covers the engaging portion 42 e of the attachment terminal 42 . The cover portion 52 of the attachment housing 38 is formed with an insertion hole 52h for inserting a connection bolt 54 as a screw portion of the screw-type terminal fitting 20 . The connection bolt 54 is a threaded portion dedicated to the attachment, and the outer diameter of the head of the connection bolt 54 is set smaller than the outer diameter of the head of the connection bolt 24 (see FIG. 6). Further, the engaging portion 42e of the attachment terminal 42 is formed in a rectangular shape and has a circular notch portion 42en.

Further, according to the terminal block attachment 50 according to the second embodiment, the same actions and effects as those of the terminal block attachment 36 are obtained. In addition, since the cover portion 52 of the attachment housing 38 covers the engaging portion 42e of the attachment terminal 42, sufficient insulation can be ensured between the attachment terminal 42 and the screw-type terminal fitting 20 adjacent thereto. can be done.

[Embodiment 3]
Another embodiment of the invention will now be described with reference to FIGS. FIG. 10 is a diagram showing how the terminal block attachment according to the third embodiment is attached to the terminal block. 11 is a perspective view of a terminal block attachment according to Embodiment 3. FIG. For convenience of description, members having the same functions as the members described in the first embodiment are denoted by the same reference numerals, and description thereof will not be repeated.

As shown in FIGS. 10 and 11, a terminal block attachment 56 according to Embodiment 3 is configured by preparing a plurality of terminal block attachments 36 according to Embodiment 1 and integrating them. Specifically, a plurality of wire insertion holes 38h are formed in the integrated attachment housing 38, and a plurality of attachment terminals 42 are provided corresponding to the plurality of wire insertion holes 38h. A plurality of tool insertion holes 38v are formed in the integrated attachment housing 38, and a plurality of leaf spring members 44 are provided corresponding to the plurality of tool insertion holes 38v.

Further, according to the terminal block attachment 56 according to the third embodiment, the same functions and effects as the terminal block attachment 36 are obtained. In addition, a plurality of screw-type terminal fittings 20 can be converted into push-in terminal fittings by one terminal block attachment 56, so that the utility value of the terminal block attachment 56 can be further enhanced.

[Embodiment 4]
Another embodiment of the present invention will now be described with reference to FIGS. 12 to 14. FIG. FIG. 12 is a diagram showing how the terminal block attachment according to the fourth embodiment is attached to the terminal block. 13 is a perspective view of a terminal block attachment according to Embodiment 4. FIG. 14 is a side sectional view of the terminal block attachment shown in FIG. 13. FIG. For convenience of description, members having the same functions as the members described in the first embodiment are denoted by the same reference numerals, and description thereof will not be repeated.

As shown in FIGS. 12 to 14, the terminal block attachment 58 according to Embodiment 4 has the same configuration as the terminal block attachment 36 (see FIG. 6) according to Embodiment 1, except for the following points. there is In the terminal block attachment 58, the attachment housing 38 has an opening 38a on its upper side. A wire insertion hole 38 h is formed in the lower portion of the attachment housing 38 , and a tool insertion hole 38 v is formed in front of the wire insertion hole 38 h in the lower portion of the attachment housing 38 . The attachment terminal 42 omits the contact portion 42c and the intermediate portion 42m, and the engagement portion 42e of the attachment terminal 42 is formed in a rectangular shape and has a circular notch portion 42en. A centerline 38hc of the wire insertion hole 38h of the attachment housing 38 is parallel to the direction along the engaging portion 42e of the attachment terminal 42 (centerline direction of the engaging portion 42e). In other words, the insertion/extraction direction of the terminal 40 a of the electric wire 40 with respect to the electric wire insertion hole 38 h of the attachment housing 38 is orthogonal to the axial direction of the connection bolt 24 .

Further, according to the terminal block attachment 58 according to the fourth embodiment, the same actions and effects as those of the terminal block attachment 36 are obtained.

(summary)
In order to solve the above-described problems, a terminal block attachment according to an aspect of the present invention includes an insulating attachment housing formed with a wire insertion portion for inserting a wire, and an inner side of the attachment housing. and an attachment terminal having a contact portion that is arranged in the terminal block and that contacts the electric wire, and an engaging portion that engages with the threaded portion of the screw-type terminal fitting of the terminal block.

With the above configuration, the engaging portion of the attachment terminal is engaged with the threaded portion of the screw-type terminal fitting, and the threaded portion of the screw-type terminal fitting is tightened. As a result, the terminal block attachment can be attached to the terminal block while the attachment terminal and the threaded portion of the screw-type terminal fitting are electrically connected, and the screw-type terminal fitting in the existing terminal block can be pushed. It can be converted to an in-type terminal fitting.

The terminal block attachment may be provided inside the attachment housing, and may include a leaf spring member that clamps the electric wire by cooperating with the contact portion of the attachment terminal by elastic restoring force.

According to the above configuration, by inserting the electric wire from the electric wire insertion portion into the attachment housing, the electric wire moves the leaf spring member in a direction away from the contact portion of the attachment terminal, thereby moving the attachment terminal. and the leaf spring member. Then, the leaf spring member clamps the electric wire in cooperation with the contact portion of the attachment terminal by elastic restoring force.

In the terminal block attachment, the attachment terminal and the leaf spring member may be formed by bending a common metal plate multiple times.

With the above configuration, the number of parts of the terminal block attachment can be reduced, and the configuration of the terminal block attachment can be simplified.

In the terminal block attachment, the attachment housing has an opening, and the attachment terminal and the leaf spring member are press-fit into the attachment housing through the opening. A locking projection for locking the attachment terminal may be formed on the edge of the .

With the above configuration, attachment of the attachment terminal and the leaf spring member to the attachment housing is simplified, and the assembling efficiency (assembling efficiency) of the terminal block attachment can be enhanced.

In the terminal block attachment, the attachment housing may be formed with a tool insertion hole for inserting a tool used when pressing the plate spring member to release the wire from the sandwiched state.

With the above configuration, when the tool is inserted into the attachment housing through the tool insertion hole, the tool presses the leaf spring member to release the clamping state of the electric wire. Thereby, the electric wire can be easily pulled out from the electric wire insertion hole to the outside of the attachment housing.

In the terminal block attachment, the engaging portion of the attachment terminal may be formed in a U shape or a Y shape.

With the above configuration, in a state in which the threaded portion of the screw-type terminal fitting is loosened without removing it, the engaging portion of the attachment terminal is pushed from the direction perpendicular to the axial direction of the threaded portion of the screw-type terminal fitting. can be engaged. This facilitates attachment of the terminal block attachment to the terminal block.

In the terminal block attachment, the width of the portion of the attachment terminal excluding the engaging portion may be set smaller than the width of the engaging portion.

With the above configuration, the width of the attachment housing can be set to be approximately the same as the width of the locking portion of the attachment terminal. Accordingly, when the engaging portion of the attachment terminal is engaged with the threaded portion of the screw-type terminal fitting, a portion of the attachment housing is moved between the two partition walls separating both sides of the screw-type terminal fitting. will get into. As a result, insulation between the attachment terminal and the screw-type terminal fitting adjacent thereto can be ensured.

In the terminal block attachment, the attachment housing has a cover portion that covers the engaging portion of the attachment terminal, and the screw portion of the screw-type terminal fitting is inserted through the cover portion of the attachment housing. through-holes may be formed.

With the above configuration, it is possible to ensure insulation between the attachment terminal and the screw-type terminal fitting adjacent thereto.

In the terminal block attachment, the attachment housing may be formed with a plurality of the wire insertion portions, and a plurality of the attachment terminals may be provided corresponding to the plurality of the wire insertion portions.

With the above configuration, a plurality of the screw-type terminal fittings can be converted into push-in-type terminal fittings by one terminal block attachment.

In the terminal block attachment, the center line of the wire insertion portion of the attachment housing may not be parallel to the direction along the engagement portion of the attachment terminal.

With the above configuration, the insertion/extraction direction of the electric wire with respect to the electric wire insertion portion of the attachment housing can be made parallel to the axial direction of the screw portion of the screw-type terminal fitting. As a result, the operator can insert and remove the electric wire and rotate (tighten/loosen) the screw portion of the screw-type terminal fitting while maintaining the same posture (orientation) with respect to the terminal block. can.

In the terminal block attachment, the center line of the wire insertion portion of the attachment housing may be parallel to the direction along the engagement portion of the attachment terminal.

With the above configuration, the insertion/extraction direction of the electric wire with respect to the electric wire insertion portion of the attachment housing can be orthogonal to the axial direction of the screw portion of the screw-type terminal fitting.

A terminal block according to an aspect of the present invention is a terminal block including the terminal block attachment, wherein partition walls formed on both sides of the screw-type terminal fitting and a part of the attachment housing are the partition walls. It is configured so that it overlaps when viewed from the direction perpendicular to the wall.

[Additional notes]
The present invention is not limited to the above-described embodiments, but can be modified in various ways within the scope of the claims, and can be obtained by appropriately combining technical means disclosed in different embodiments. is also included in the technical scope of the present invention.

REFERENCE SIGNS LIST 10 terminal block 12 electronic device 14 electronic device main body 18 terminal block main body 18s storage space 20 screw terminal fitting 22 fixing nut 24 connection bolt (screw portion)
26 Washer 28 Connection terminal 30 Board 32 Pin 36 Attachment for terminal block (attachment for terminal block according to Embodiment 1)
38 attachment housing 38a opening 38f inner surface 38h wire insertion hole (wire insertion part)
38hc center line 38v tool insertion hole (tool insertion part)
40 Electric wire 40a Terminal 42 Attachment terminal 42c Contact portion 42e Engagement portion 42en
42m Intermediate portion 44 Leaf spring member 46 Tool 48 Locking projection 50 Attachment for terminal block (attachment for terminal block according to Embodiment 2)
52 cover portion 52h insertion hole 54 connection bolt (screw portion)
56 terminal block attachment (terminal block attachment according to the third embodiment)
58 Terminal block attachment (terminal block attachment according to Embodiment 4)

Claims

an insulating attachment housing formed with a wire insertion portion for inserting a wire;
A terminal block attachment comprising: an attachment terminal disposed inside the attachment housing and having a contact portion that contacts the electric wire; and an attachment terminal that engages a screw portion of a screw-type terminal fitting of the terminal block. .
The terminal block attachment according to claim 1, further comprising a plate spring member provided inside the attachment housing and holding the electric wire by cooperation with the contact portion of the attachment terminal by elastic restoring force.
The terminal block attachment according to claim 2, wherein the attachment terminal and the leaf spring member are formed by bending a single common metal plate multiple times.
The attachment housing has an opening, the attachment terminal and the leaf spring member are press-fit into the attachment housing through the opening, and the attachment terminal is attached to the edge of the opening of the attachment housing. 4. The terminal block attachment according to claim 3, wherein a locking projection for locking the terminal block is formed.
5. Any one of claims 2 to 4, wherein the attachment housing is formed with a tool insertion portion for inserting a tool used when pressing the plate spring member to release the clamped state of the electric wire. Attachment for terminal block described in item.
The terminal block attachment according to any one of claims 1 to 5, wherein the engaging portion of the attachment terminal is formed in a U-shape or a Y-shape.
The terminal block attachment according to any one of claims 1 to 6, wherein the width of the portion of the attachment terminal excluding the engaging portion is set smaller than the width of the engaging portion.
The attachment housing has a cover portion that covers the engaging portion of the attachment terminal, and an insertion hole is formed in the cover portion of the attachment housing for inserting the screw portion of the screw-type terminal fitting. 8. The terminal block attachment according to any one of claims 1 to 7.
A plurality of the wire insertion portions are formed in the attachment housing,
The terminal block attachment according to any one of claims 1 to 7, wherein a plurality of said attachment terminals are provided corresponding to a plurality of said wire insertion portions.
The terminal block attachment according to any one of claims 1 to 9, wherein the center line of the wire insertion portion of the attachment housing is not parallel to the direction along the engaging portion of the attachment terminal.
The terminal block according to any one of claims 1 to 9, wherein a center line of said wire insertion portion of said attachment housing is parallel to a direction along said engaging portion of said attachment terminal. attachment.
A terminal block comprising the terminal block attachment according to any one of claims 1 to 11,
A terminal block, wherein partition walls formed on both sides of the screw-type terminal fitting and a part of the attachment housing overlap with each other when viewed from a direction perpendicular to the partition wall.