JP6160984B2 - Terminal block for mounting temperature fuse - Google Patents

Description

  The present invention relates to a terminal block such as a power cable that detects an excessive increase in temperature and can cut off a circuit.

For example, in the field of power cable terminal blocks such as power conditioning in a solar system, it is common to crimp a round terminal on a conventional power cable and then fix it to the terminal block 110 with screws 120 as shown in FIG. Has been done.
When a temperature fuse is installed on such a terminal block, the lead wires 101a and 101b of the temperature fuse 101 and the connector 103 are crimped and connected with the crimping terminal 102 and the like, and are bonded and fixed to the terminal block, and further to the cover member 110a. It was done to cover.
In this case, many man-hours are required for the wire connection work and the bonding work, and the workability is poor, resulting in high costs.
For example, in Patent Document 1, a temperature fuse is attached to a distribution board to detect heat generation caused by insufficient tightening of an MCCB terminal and a power supply side terminal, and a leaf spring is attached to each outside of an insulating jacket near the terminal. Disclose the structure.
However, the wiring work is also difficult in this case.

JP-A-5-159180

  An object of the present invention is to provide a highly reliable terminal block in which a temperature fuse can be easily attached.

The present invention is a terminal block housing a plurality of terminal terminals in a housing ,
Each of the plurality of terminal terminals has a fuse installation part for installing a temperature fuse, and the fuse installation part consists of a substantially U-shaped rib formed on a connection wall erected from the base part of the terminal terminal, The housing has a terminal mounting part for mounting a connection terminal for connecting a temperature fuse, the temperature fuse is installed in the fuse installation part of the arbitrary terminal terminal , the connection terminal is mounted in the terminal mounting part, The lead wire of the temperature fuse or the core wire of the cable can be inserted and connected to the elastic pinching connection portion provided in the connection terminal, and the temperature fuse can be connected to the control unit via the connection terminal .
As a result, the temperature fuse is attached to the fuse installation portion of the terminal terminal, and the connection can be made simply by inserting (inserting) the lead wire of the temperature fuse or the core wire of the cable into the connection terminal attached to the terminal block.

In the present invention, when each of the plurality of terminals terminals providing a fuse installation portion, the temperature fuse installed in any of the fuse installing portion, a connection terminal is attached to the terminal mounting portion of the housing, through the temperature fuse connection terminals This enables wiring connection with the control unit .
If it does in this way, a temperature fuse can be attached to arbitrary terminal terminals, matching with the specification and kind of a power cable connected to a terminal block.

In the present invention, for the purpose of adding a degree of freedom to the number of terminals of the terminal block , each of the plurality of terminal terminals is housed in a single housing, and each of the housings can be connected to each other and each of the terminals is a terminal. A mounting part may be provided, a temperature fuse may be installed in an arbitrary fuse installation part, a connection terminal may be installed in an arbitrary terminal installation part, and the temperature fuse may be connected to the control unit via the connection terminal.

  In the terminal block according to the present invention, a temperature fuse is installed and attached to a fuse installation part provided in a terminal terminal, a connection terminal having an elastic connection part is attached to a terminal attachment part provided in a housing, and a lead wire or Since it can be connected simply by inserting and connecting the tip of the cable core wire, local connection work is easy.

The structural example of the terminal block which concerns on this invention is shown, (a) is a connection example of a temperature fuse, (b) is the connection example of a housing, (c) shows the example which has arrange | positioned the temperature fuse to a terminal block. The structural example of a housing is shown, (a) is a state before attaching a temperature fuse and a connection terminal, (b) shows the state after the attachment. The positional relationship between the temperature fuse and the connection terminal, and the terminal terminal and the housing is shown. (A) shows the installation portion of the terminal terminal, and (b) and (c) show the positional relationship between the housing, the connection terminal, and the temperature fuse. An example of the electrical connection structure of the power cable is shown, (a) shows a state in which the locking portion of the elastic member is opened and the core wire of the power cable is inserted, and (b) shows a state in which the slider is pushed in and connected. An example of the structure of a connection terminal is shown. (A) is a housing, (b) shows the connection state of this housing. (A)-(c) shows the connection example of the conventional terminal block and a temperature fuse.

  Although the structural example of the terminal block which concerns on this invention is demonstrated based on drawing below, this invention is not limited to this.

FIG. 1 shows an example of a terminal block in which five housings 10 are connected, and is an example in which temperature fuses 1 are installed at three locations.
The temperature fuse 1 and the connection terminal 2 are connected after the temperature fuse 1 is attached to the fuse installation portion 21 of the terminal terminal 20 and the connection terminal 2 is attached to the terminal attachment portions 11a and 11b of the housing 10 as shown in FIGS. However, in FIG. 1, the connection example of the temperature fuse 1, the connection terminal 2, and the connector 3 is shown in a pre-connected state so that it can be easily understood.

As shown in FIGS. 2 and 3, a terminal terminal 20, an elastic member 30, and a slider 40 are mounted on each housing 10.
In this embodiment, the terminal terminal 20 and the elastic member 30 are used to elastically hold the core wire 7a of the power cable 7 as shown in FIG. As long as it is formed, there is no limitation on the connection structure such as a power cable.
Each housing 10 is a resin molded product, and is provided with two recessed terminal mounting portions 11 a and 11 b for mounting the connection terminal 20.
The housings 10 can be connected to each other.
In this embodiment, among the side portions on both sides of the housing 10, the groove-like connecting concave portion 11 is formed at one lower end portion, and the rail-like connecting convex portion is formed at the other lower end portion, so that another housing is formed. Can be connected to.
Further, in consideration of connection stability, a convex portion 12a is provided at the upper end portion of one side of the housing 10 so as to face the connecting concave portion 11 at the lower end portion, and a concave portion 11a is connected to the upper end portion of the other side portion at the lower end portion. It is formed to face the convex part.
A contact protrusion 13a is formed at the end of the connection recess 11 of the housing 10, a claw-shaped connection locking portion 13 is formed so as to face the front and rear direction, and the other stepped locked portion 14 is formed. The connection state of the housing is locked by the connection locking portion 13 being locked.
Thereby, a terminal block having an arbitrary number of terminal terminals can be obtained by connecting a plurality of housings 10 as shown in FIGS.

Next, a connection structure example of the power cable 7 and the like will be described.
In the housing 10, the terminal terminal 20 and the elastic member 30 as shown in FIG. 5 are combined and stored, and a slider 40 is stored slidably.
The terminal terminal 20 is provided with a connection wall 22 erected in a direction substantially perpendicular to the base portion 20a, and a substantially U-shaped rib 21a as shown in FIG. The installation part 21 of the temperature fuse 1 is provided.
The base portion of the elastic member 30 is arranged so as to overlap the back surface of the base portion 20a so that the core wire 7a of the power cable 7 can be inserted and connected to the terminal terminal 20, and the curved pressed portion 31 is folded back from the base portion. A locking portion 32 is formed by projecting downward, and further folding the tip end upward.
The locking portion 32 has an opening 33 and is provided with a locking piece portion 32a for locking the core wire 7a inserted and placed on the base portion 20a of the terminal terminal 20 from above.
Further, a curved elastic contact portion 34 is erected from the base of the elastic member 30 so as to face the connection wall 22, and the elastic contact portion 34 biases the core wire 7 a toward the connection wall 22.
In this embodiment, when the protrusion 41 is formed on the slider 40 and the slider 40 is pulled out of the housing 10, the protrusion 41 lowers the pressed portion 31 of the elastic member 30 as shown in FIG. When it is pushed up from the side, the locking piece portion 32a of the locking portion is raised and opened, and in this state, a cable is inserted from the connection hole 15 of the housing 10 and then the slider is pushed in, as shown in FIG. In this example, the locking portion 32 is elastically restored, and the core wire 7a is locked by the locking piece portion 32a.

An example of the structure of the connection terminal 2 is shown in FIG.
The elastic piece 2c is formed by bending the elastic material into a box shape and folding one end of the elastic material further inward.
An insertion hole 2a is formed on the side wall of the bent portion 2b on which the elastic piece 2c is formed so that the lead wires 4a and 4b of the temperature fuse 1 and the tip of the cable 5 can be inserted toward the elastic piece 2c. A pair of guide portions 2d are erected on the inner side.
As a result, when the tip of the lead wire or the cable core wire is inserted between the guide hole 2d and 2d from the insertion hole 2a, the core wire is elastically sandwiched and connected between the inner surface of the box-shaped surface and the elastic piece 2c. .
In addition, when the core wire is a stranded wire, it is preferable to treat the tip with solder or the like.
Thereby, as shown in FIG. 1, the temperature fuse 1 is installed in the fuse installation part 21 provided in the terminal terminal of an arbitrary housing constituting the terminal block, and the connection terminal 2 is installed in the arbitrary terminal mounting parts 11a and 11b. These can be connected simply by inserting the lead wires 4a and 4b, the cable 5 and the cable of the connector 3 into the connection terminal.

DESCRIPTION OF SYMBOLS 1 Temperature fuse 2 Connection terminal 10 Housing 11 Connection recessed part 11a Terminal mounting part 12 Connection convex part 13 Connection locking part 14 Locked part 20 Terminal terminal 21 Fuse installation part

Claims (2)

A terminal block containing a plurality of terminal terminals in a housing ,
Each of the plurality of terminal terminals has a fuse installation portion for installing a temperature fuse,
The fuse installation part consists of a substantially U-shaped rib formed on a connection wall erected from the base part of the terminal terminal,
The housing has a terminal mounting portion for mounting a connection terminal for connecting a temperature fuse,
Install the temperature fuse in the fuse installation part of the arbitrary terminal ,
Attach a connection terminal to the terminal mounting part,
The lead wire of the temperature fuse or the core wire of the cable can be inserted and connected to an elastic pinching connection portion provided in the connection terminal ,
A terminal block characterized in that the temperature fuse can be connected to a control unit via a connection terminal . Each of the plurality of terminal terminals is housed in a single housing;
The housings can be connected to each other and each has a terminal mounting portion,
Install a temperature fuse in any fuse installation,
Attach the connection terminal to any terminal mounting part,
Terminal block according to claim 1, characterized in that the said temperature fuse can be wired connected to the control unit through a connection terminal.

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