JP3327529B2 - Screwless terminal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screwless terminal device for fixing a connecting conductor such as an electric wire or a copper bar to a terminal plate by a contact pressure spring by operating a release lever.

[0002]

2. Description of the Related Art As shown in FIG. 5, in this type of screwless terminal device, a contact pressure spring 50 is connected to a terminal plate 55 and a rear end of an upper end of a front plate portion 52 through which a fixing hole 51 through which an electric wire can be loosely inserted is provided. The front plate portion 52 is urged upward by the curved plate portion 53, and the lower end of the hole edge of the fixing hole 51 is fixed to the lower surface of the terminal plate 55 by pressing an electric wire, a copper bar, or the like into contact therewith. And
When the electric wire is inserted into the fixing hole 51, the upper surface of the curved plate portion 53 of the contact pressure spring 50 is pressed downward by the release lever 54, and the front plate portion 52 is pressed down, so that the terminal at the lower edge of the fixing hole 51 is closed. The press contact with the plate 2 was loosened.

[0003] However, in this conventional device, since an electric wire, a copper bar, or the like is connected to the lower surface of the terminal plate 55, the electric wire can be bent. When connecting a copper bar such as a branching bar, if the thickness of the branching bar is large, the branching bar pushes up the terminal plate 55, the device body rises from the mounting surface, and a spacer is provided on the bottom surface of the device body. There was a problem that it was necessary to intervene. In addition, since the release lever 54 presses the upper surface of the contact pressure spring 50, the rotation shaft 5
Since the position 4a is located above the contact spring 50, the distance between the operating point 54b of the release lever 54 and the rotating shaft 54a cannot be increased, so that there is a problem that the operating load applied to the release lever cannot be reduced.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the prior art, and enables accurate connection not only to electric wires but also to copper bars having different plate thicknesses. An object of the present invention is to provide a screwless terminal device capable of reducing the operating load when pressed against the terminal.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. According to the present invention, a connecting conductor is connected between a terminal plate and a horizontal pressing portion by a contact pressure spring in which the horizontal pressing portion is pressed against the upper surface of the terminal plate. In a screwless terminal device that is sandwiched and connected between
A release lever for pushing up the horizontal pressing portion from below is provided. Preferably, the rotation axis of the release lever is located below the upper end of the contact pressure spring. Furthermore, although the state where the horizontal pressing portion is pushed up by the release lever is held, it is also preferable to provide a release lever holding portion which releases the pushed up state when the connection conductor is inserted.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to a terminal device of a circuit breaker for wiring shown in FIGS. Reference numeral 1 denotes a contact pressure spring in which the horizontal pressing portion 2 wider than the terminal plate 55 is pressed against the upper surface of the terminal plate 55. The contact pressure spring 1 continued behind the upper end of the front plate 4 through which the terminal plate 55 and the insertion port 3 through which the connection conductor such as an electric wire and a copper bar connected to the upper surface of the terminal plate 55 could be loosely fitted. An upright plate portion 6 continuously provided at the tip of the horizontal pressing portion 2 continued forward below the curved plate portion 5.
Is made of a band-shaped spring plate material that protrudes from the front surface of the insertion opening 3 and closes the insertion opening 3. The horizontal pressing portion 2 is attached to the upper surface of the terminal plate 55, and the terminal plate 5 is attached to the insertion opening 3.
5, the horizontal pressing portion 2 is constantly pressed against the upper surface of the terminal plate 55 by the elastic force given by the curved plate portion 5. The contact pressure spring 1 connects the horizontal pressing portion 2 to the terminal plate 55.
The structure is not particularly limited as long as it is in contact with the upper surface of.

Reference numeral 8 denotes a release lever that pushes the horizontal pressing portion 2 of the contact pressure spring 1 pressed against the upper surface of the terminal plate 55 upward from below, between the upper surface of the terminal plate 55 and the horizontal pressing portion 2. It forms a space through which connection conductors such as electric wires and copper bars can be inserted. The release lever 8 has the rotary shaft 8a positioned below the upper end of the contact pressure spring 1, and the push-up claw 9 provided below and forward of the rotary shaft 8a faces the lower surface of the horizontal pressing portion 2. Handle part 10 to case 56
Is overhanging. The release lever 8 is a bifurcated plate having a space in which the contact pressure spring 1 and the terminal plate 55 can intervene in the center below the handle portion 10 as shown in FIGS. 1, 2 and 3 (c). The forked plate-shaped part 1
The push-up claws 9, 9 protruding from the inside of the terminal plate 1 face the lower surfaces on both sides of the horizontal pressing portion 2 of the contact pressure spring 1 projecting from both sides of the upper surface of the terminal plate 55 from both sides of the terminal plate 55.
The forked plate-shaped portion 11 has a circular outer shape, and is rotatably supported by a circular recess provided in the case 56 so that the rotating shaft 8a is positioned below the upper end of the contact pressure spring 1 as described above. .

[0010] In the structure thus constructed, the horizontal pressing portion 2 of the pressure spring 1 is pressed against the upper surface of the terminal plate 55 in the normal state shown in FIG. 1 in which the connection conductor 21 such as an electric wire or a copper bar is not connected. The upright plate portion 6 connected to the end of the horizontal pressing portion 2 closes the insertion opening 3 provided in the front plate portion 4 to connect the connecting conductor 21.
Cannot be inserted. Therefore, in order to connect the connection conductor 21 such as an electric wire or a copper bar, first, as shown in FIG. 2, the release lever 8 is erected and the push-up claw portion 9 is turned upward from the rotation shaft 8a as a starting point. The horizontal pressing portion 2 of the contact pressure spring 1 is pushed upward from below to form a space s through which a connection conductor such as an electric wire or a copper bar can be inserted between the upper surface of the terminal plate 55 and the horizontal pressing portion 2. The insertion port 3 provided in the plate portion 4 is opened.

Then, a connecting conductor 21 such as an electric wire or a copper bar is inserted into this space s, and then the release lever 8 is released from the standing state as shown in FIG. When the lifting of the horizontal pressing portion 2 is released, the horizontal pressing portion 2 sandwiches and connects the connection conductor 21 between the horizontal pressing portion 2 and the upper surface of the terminal plate 55 by the elastic force of the contact pressure spring 1. When the horizontal pressing portion 2 is pushed upward, the front plate portion 4 provided with the insertion opening 3 into which the terminal plate 55 is fitted is also urged upward. If the front plate 4 is not firmly fixed, there is a danger that the front plate 4 will move upward. To prevent the front plate 4 from moving upward, a bent portion 4a or a locking hole is provided below the front plate 4. It is provided to engage with the case and other parts. Further, in order to prevent the connected connection conductor 21 from coming off, it is preferable that the claw piece 2a engaging with the connection conductor 21 be cut and raised on the lower surface of the horizontal pressing portion 2.

In the present invention, as described above, the connection conductor 21 such as an electric wire or a copper bar is connected to the upper surface of the terminal plate 55 by pressing the horizontal pressing portion 2 by the elastic force of the pressing spring 1. Even when copper bars having different thicknesses are connected, the lower surface of the copper bar, which is at the same level, is brought into contact with the upper surface of the terminal plate 55, so that the device body can be accurately connected without being lifted from the mounting surface. Further, by positioning the rotation shaft 8a of the release lever 8 below the upper end of the contact pressure spring 1, the distal end 1 of the handle portion 10, which is the operating point of the release lever 8, is set.
0a and the rotating shaft 8a are arranged so that the rotating shaft 8a
The operation load applied to the release lever when the release lever is pressed against the contact pressure spring can be reduced, and the operation becomes easier.

Next, a modification of the embodiment shown in FIG.
When the release lever 8 rises, the horizontal pressing portion 2 of the contact pressure spring 1
Is pushed upward from below to form a space between the upper surface of the terminal plate 55 and the horizontal pressing portion 2 where a connection conductor such as an electric wire or a copper bar can be inserted. A release lever holding portion 12 is provided to hold the push-up state of the portion 2 but release the push-up state when the connection conductor is inserted. The release lever holding portion 12 is provided with a latch 12b on the upper front surface of a connection conductor receiving plate 12a whose lower end faces the base end of the terminal plate 55 and whose upper end is pivotally supported by the case. When the space in which the connection conductor can be inserted is formed by setting the lever 8 in the upright state (b) from the folded state, the release lever 8 is engaged with the latch 12b by the engaging portion 10b provided on the side surface of the handle portion 10. If the connection conductor 21 such as an electric wire or a copper bar is inserted into the space as shown in FIG.
As shown in (d), the leading end of the connecting conductor 21 abuts against the front surface of the lower end of the connecting conductor receiving plate 12a, and the lower end of the connecting conductor receiving plate 12a is pushed rearward around the pivot point to latch 12b.
Is rotated downward to release the engagement of the release lever 8 with the engagement portion 10b, and release the pushing of the horizontal pressing portion 2 of the contact pressure spring 1 by the push-up claw portion 9 to release the contact pressure spring 1. The horizontal pressing portion 2 presses and connects the connection conductor 21 to the upper surface of the terminal plate 55 by the elastic force.

By providing such a release lever holding portion 12, the upright of the release lever 8 is released after the connection conductor such as an electric wire or a copper bar is inserted, and the contact pressure spring 1 is horizontally moved by the push-up claw portion 9. It is not necessary to release the push-up of the pressing portion 2, and not only the workability is improved, but also the electric wires,
Unless the distal end of the connection conductor such as a copper bar is completely inserted to the base end of the terminal plate 55, the release lever holding portion 12 does not operate on the release side of the release lever 8 so that insufficient insertion of the connection conductor can be prevented and reliable connection can be prevented. You can do it.

[0013]

As described above, according to the screwless terminal device of the present invention, the horizontal conductor is pressed against the upper surface of the terminal plate with the connecting conductor such as an electric wire or a copper bar by the elastic force of the contact pressure spring. Since the connection is made, copper bars having different thicknesses can be connected accurately. Further, by positioning the rotation axis of the release lever below the upper end of the contact pressure spring, the operating load applied to the release lever when the release lever is pressed against the contact pressure spring can be reduced. Therefore, it is a great benefit to the industry as a solution to the problem of the conventional screwless terminal device.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of the present invention in a normal state, (a) is a side view, (b) is a side view of a main part,
(C) is a view on arrow AA of (b).

FIG. 2 is a schematic explanatory view showing an embodiment of the present invention in a state in which a release lever is in an upright state, (a) is a side view, (b) is a side view of a main part, and (c) is A in (b). FIG.

FIG. 3 is a schematic explanatory view showing an embodiment of the present invention by connecting connection conductors, (a) is a side view, (b) is a side view of a main part, and (c) is A of (b). FIG. It is a front view of a screwless terminal device.

FIG. 4 is an explanatory diagram showing a modification of the embodiment of the present invention.

FIG. 5 is a side view of a conventional screwless terminal device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact pressure spring 2 Horizontal pressing part 8 Release lever 8a Rotary shaft 12 Release lever holding part 55 Terminal board

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01R 4/48

Claims (3)

(57) [Claims] A connecting conductor is sandwiched between the terminal plate (55) and the horizontal pressing portion (2) by a contact pressure spring (1) in which the horizontal pressing portion (2) is pressed against the upper surface of the terminal plate (55). A terminal device for screwless connection, wherein a release lever (8) for pushing up the horizontal pressing portion (2) from below is provided. 2. The screwless terminal device according to claim 1, wherein the rotation shaft (8a) of the release lever (8) is located below the upper end of the contact pressure spring (1). 3. A horizontal pressing portion by a release lever (8).
The screwless terminal device according to claim 1 or 2, further comprising a release lever holding portion (12) for holding the push-up state of (2) but releasing the push-up state when the connection conductor is inserted.