JPH10255884A - Terminal block - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain easy connecting work, good contact, elimination of plastic deformation and breakage, and size reduction. SOLUTION: This terminal block is provided with a case body 1 having a terminal hole, a cover 2 which is connected to the case body 1 through a hinge part 3, and closes the opening of the case body 1 so as to be capable of opening and closing, a contact piece 9 consisting of clamping pieces 7, 8 fitted on the case body 1, and a terminal 5 of the contact piece 9 inserted in the terminal hole, and is formed so that the clamp pieces 7, 8 are pressed to the case body 1 side by the folded cover with the hinge part 3 serving as its fulcrum to clamp a lead body C to be connected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal block for removably pressing a lead wire of an electric cable in, for example, a signal transmission line so as to be electrically connected to an electronic circuit of a printed wiring board.

[0002]

2. Description of the Related Art Conventionally, as a terminal block of this type, for example, as disclosed in Japanese Utility Model Laid-Open No. Hei 6-21157,
The terminal piece is attached to the case body, one end of the contact piece is fixed to the terminal piece, and the opening of the case body is closed by a cover formed separately from the terminal piece. There is known a structure in which a lead wire inserted into a lead wire insertion hole is electrically connected by sandwiching the lead wire between the contact piece and the terminal piece. In other words, the terminal block is connected to the case by inserting a jig such as a screwdriver through a jig insertion hole formed in the case body and displacing the contact piece against a spring force. The contact piece and the terminal piece are inserted between the lead wire insertion hole of the main body and the terminal piece to be electrically connected by being sandwiched.

[0003]

However, according to the above configuration, the lead wire must be connected using a jig, which is not only troublesome in connection work, but also complicated.
An excessive stress is applied to the contact piece, which may cause plastic deformation or breakage. Further, if the contact piece is formed to be short in order to reduce the size of the terminal block, the pressure contact force with the lead wire becomes large and the contact property is good, but on the other hand, the contact piece may have spring properties. The lead wire must be connected inside a closed case that cannot be made and cannot be seen from the outside, and the connection work is extremely difficult. Further, since the case body and the cover, and the contact piece and the terminal piece are separately formed and have a large number of parts, there is a problem that the efficiency of electrical connection and assembly work of these small parts is poor.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a miniaturized terminal block which can be easily connected and has good contact properties and is free from plastic deformation or breakage.

[0005]

According to a first aspect of the present invention, there is provided a terminal block having a case main body having a terminal hole and being connected to the case main body via a hinge to open and close the opening of the case main body. It is characterized by comprising a cover, a contact piece comprising a holding piece mounted on the case body, and a terminal of the contact piece inserted into the terminal hole.

A terminal block according to a second aspect of the present invention is characterized in that a terminal is formed integrally with the contact piece. The terminal block according to the third aspect of the present invention is characterized in that the cover and the case main body are provided with a locking portion for locking the cover folded back on the hinge portion as a fulcrum to the case main body. A terminal block according to a fourth aspect of the present invention is characterized in that an unlocking projection for unlocking the cover is provided on the cover.

[0007]

According to the first aspect of the present invention, if the cover is folded around the hinge portion and the holding piece is pressed toward the case body,
Not only is it extremely easy to connect the lead body to be connected with the above-mentioned holding piece without using a jig, but also it is possible to perform plastic deformation or breakage without applying excessive force to the above-mentioned contact piece. There is no danger. Further, even if the terminal block is downsized, the contact piece can be pressed against the lead body while being pressed by the cover, so that the pressure contact force with the lead body is increased and the contact property is good. Since the lead body is connected in a state where it is opened and can be visually recognized from the outside, the connection operation is extremely easy. Further, since the case body and the cover are integrally connected by the hinge portion, the number of parts is reduced, the handling is cheap, and the efficiency of electrical connection and assembly work is improved.

According to the second aspect of the present invention, since the terminals are integrally formed on the contact pieces, the number of parts is further reduced, and the working efficiency is further improved. According to the third and fourth aspects of the present invention, the cover folded around the hinge portion can be locked to the case body with one touch via the locking portion, so that electrical connection and assembly work are easy, and The locking of the cover can be easily released by pressing the unlocking projection.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded sectional view showing an example of a terminal block according to the present invention. In FIG. 1, the terminal block includes a case A and a contact terminal portion B, and the case A includes a case main body 1 and a cover 2 made of, for example, a synthetic resin. That is, the case A is formed by integrally connecting a cover 2 to a case body 1 having a terminal hole 1a at the bottom via a hinge 3, and a lead body is fitted to the case body 1 and the cover 2. Notch holes 4a and 4b for insertion are formed,
Locking portions 1c and 2a for locking the cover 2 folded around the hinge portion 3 as a fulcrum to the case body 1, and the cover 2
When the opening 1b of the case main body 1 is closed by the cover 2, the locking portion is locked by the locking portions 1c and 2a, and the locking The release projection 2b is configured to be pressed to release the locking of the cover 2.

The contact terminal section B includes a terminal piece 6 having a terminal 5 made of, for example, a copper alloy and a contact piece 9 consisting of holding pieces 7 and 8 of a lead body. 9 are integrally formed by projecting from both end portions of the terminal piece 9. As shown in FIG. 2, the contact terminal portion B is fixed by inserting the terminal 5 into the terminal hole 1 a of the case main body 1 and engaging the locking projection 10 of the contact piece 9 with the locking hole 11 of the case main body 1. Is done. Reference numeral 12 denotes an electrode insertion hole for a conduction detection electrode (not shown).

In the above configuration, the cover 2 is connected to the hinge 3
After passing through a state shown by a solid line and a virtual line (FIG. 2) from a solid line as a fulcrum and turning back to the case body 1 side (FIG. 3), and locking the locking portions 1c and 2a, the cutout holes 4a and 4b are formed. As a result, the case A in which the substantially circular lead body insertion hole 4 (FIG. 4) is formed and the opening 1b of the case main body 1 is closed can be formed. At this time, the tip 8a of the holding piece 8 on the cover 2 is engaged with the engagement groove 2c while being guided by the tapered guide surface 8d, and the holding piece 8 is held by the cover 2 to hold the holding piece 8 on the case body 1 side. 7 can be pressed.

Therefore, as shown in FIG. 5, the lead C for connection is inserted into the cutout hole 4a of the case body 1 and the cover C is inserted.
The cover 2 is attached to the case body 1 with the lead portion C1 from which the cover 2 has been peeled in contact with the holding piece 7 on the case body 1 side.
When the opening 1b of the case body 1 is closed as shown in FIG. 6, the holding pieces 7, 8 are pressed by the case body 1 and the cover 2 to push the lead portion C1 by spring force. It can be pinched and electrically connected to the terminal 5.

According to the above configuration, if the cover 2 is folded around the hinge 3 and the holding pieces 7, 8 are pressed toward the case body 1, the connected lead body can be used without using a jig. C is sandwiched between the holding pieces 7 and 8, and the connecting operation thereof is extremely easy. Further, no excessive stress is applied to the contact piece 9 and there is no possibility of plastic deformation or breakage. Further, even if the terminal block is downsized, the contact piece 9 is covered with the cover 2.
Can be pressed against the lead body C while pressing it, so that the pressure contact force with the lead body C is increased and the contact property is good, and the opening 1b of the case body 1 is opened to be visually recognized from the outside. Since the lead body C is connected in a state where it can be made, the connection operation is extremely easy. Further, since the case body 1 and the cover 2 are integrally connected by the hinge part 3,
The number of parts is reduced, the handling is cheaper, and the efficiency of electrical connection and assembly work is improved.

In addition, by forming the contact piece 9 integrally with the terminal 5, the number of parts is further reduced, and the work efficiency is further improved. Further, since the cover 2 that is folded back with the hinge 3 as a fulcrum is fastened to the case main body 1 via the locking portions 1C and 2a with one touch, electrical connection and assembly work are easy, and the cover 2 Is locked by the unlocking projection 2b
Can be easily released by pressing.

[0015]

As described above, according to the present invention, it is possible to provide a miniaturized terminal block which can be easily connected, has good contact properties, and is free from plastic deformation and breakage.

[Brief description of the drawings]

FIG. 1 is an exploded sectional view showing an example of a terminal block according to the present invention.

FIG. 2 is an assembled sectional view of the terminal block opened.

FIG. 3 is an assembled sectional view of the closed terminal block.

FIG. 4 is an assembled front view of the closed terminal block.

FIG. 5 is an assembled sectional view for explaining a connection operation of the terminal block.

FIG. 6 is an assembled sectional view illustrating a connection state of the terminal block.

[Explanation of symbols]

 Reference Signs List A Case B Contact terminal part C Lead body for connection 1 Case body 1a Terminal hole 1b Opening 1c Lock part 2 Cover 2a Lock part 2b Lock release protrusion 3 Hinge part 5 Terminal 6 Terminal piece 7 Nipping piece 8 Holding piece 9 Contact piece

Claims (4)

[Claims] 1. A case main body having a terminal hole, a cover connected to the case main body via a hinge to close an opening of the case main body so that the opening can be opened and closed, and a holding piece mounted on the case main body. A contact piece and a terminal of the contact piece inserted through the terminal hole are provided, and the holding piece is pressed against the case body side by a cover folded around a hinge portion as a fulcrum to form a lead for connection. A terminal block characterized in that it is configured to be clamped. 2. The terminal block according to claim 1, wherein a terminal is formed integrally with the contact piece. 3. The terminal block according to claim 1, wherein the cover and the case main body are provided with a locking portion for locking the cover, which is turned around a hinge portion as a fulcrum, to the case main body. 4. The terminal block according to claim 3, wherein an unlocking projection for unlocking the cover is provided on the cover.