JP2790738B2 - 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 terminal device applied to a circuit breaker or the like.

[0002]

2. Description of the Related Art FIGS. 10 to 12 show a conventional example. That is, the terminal device of the circuit breaker is provided with a terminal screw 73 in a screw hole 72 of a terminal plate 71 provided at the end of the case 70.
Is screwed. 74 is the body of the case 70,
75 is a cover, 76 is a handle.

[0003]

However, in this terminal device, it is important to tighten the terminal screw 73 when connecting an electric wire or other conductor, but it is necessary to prevent the terminal device 73 from being affected by the skill of the operator. In addition, it was necessary to pay attention to sufficient initial tightening strength so that troubles caused by aging caused by environmental conditions such as heat cycles and vibrations due to energization / de-energization did not occur. In addition, it was necessary to periodically check whether the terminal screws were loose or not to be retightened.

[0004] Therefore, an object of the present invention is to provide a terminal device that can always maintain a uniform connection state and can shorten the operation time.

[0005]

According to the first aspect of the present invention, there is provided a terminal device comprising:
A lock portion having a display spring portion adjacent to a lock spring portion, and a terminal portion having a terminal plate disposed opposite to the lock spring portion via an electric wire insertion gap and having a locking portion provided on the terminal plate. When,
It has a pressing portion that is movably arranged in the direction of pressing the display spring portion and presses the display spring portion, and has a hook receiving portion that is hooked on the locking portion in a state where the display spring portion is pressed. A display piece that has an elastic latch plate and is pressed by a tip end of an electric wire that has entered between the locking spring portion and the terminal plate to release the hook of the hook receiving portion. Things.

According to a second aspect of the present invention, in the terminal device according to the first aspect, in a state where the hook receiving portion is hooked on the locking portion, the pressing portion is configured such that the wire insertion gap is equal to or larger than the outer diameter of the wire. Is a part of the lock spring portion pressed.

[0007]

According to the terminal device of the first aspect, the non-connected state is displayed by pressing the display piece, pressing the display spring portion by the pressing portion, and locking the hook receiving portion to the locking portion. When the wire is inserted into the wire insertion gap and the latch plate is pressed with the tip, the hook receiving portion is disengaged from the locking portion, and the pressing portion is pressed by the display spring portion to move the display piece. As a result, the electric wire is locked by the locking spring portion and pressed against the terminal plate to be in a connected state, and the connection state is displayed by moving the display piece. For this reason,
A uniform connection state can always be ensured, and the work time can be shortened, leading to a reduction in construction work.

According to a second aspect of the present invention, in the first aspect, the wire insertion gap is equal to or larger than the outer diameter of the wire in a state where the hook receiving portion is hooked on the locking portion. Because a part of the pressing portion pressed the locking spring portion,
The wire can be inserted smoothly without receiving the resistance of the lock spring when inserting the wire, and the latch spring is released from the lock by pressing the latch plate with the end of the wire, and the display piece is moved, so that the lock spring is Since the wire is engaged and locked, there is no risk of incomplete insertion of the wire, and work can be easily performed even in shallow places within the panel.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A circuit breaker to which a first embodiment of the present invention is applied will be described with reference to FIGS. That is, a pair of terminal devices are provided at each end of the case of the two-pole type circuit breaker.
And a display piece 3. The lock 1 has a display spring 5 adjacent to the lock spring 4. In the embodiment, the contact pressure portion 6 is formed integrally with the lock portion 1. In this case, one end of the leaf spring is turned toward the other end to form the lock portion 1, and the other end is turned at the turn portion 7 so as to enter the inside of the lock portion 1, and the tip portion is further locked. The contact pressure portion 6 is formed by being folded by the folded portion 8 in the same direction as the portion 1. Further, the display spring portion 5 is formed so as to be adjacent to the lock portion 1 by attaching a cut line 35 to one end of the leaf spring.

The terminal portion 2 has a terminal plate 10 opposed to the locking spring portion 4 with a wire insertion gap δ interposed therebetween, and has a locking portion 11 provided on the terminal plate 10. In the embodiment, as shown in FIG. 2, a bottom plate portion 12, a pair of support pieces 13, 14 erected from side edges of the bottom plate portion 12, and a spring support piece 15 provided between the pair of support pieces 13, 14. The terminal plate 10 is formed at the tip of the support piece 13 so as to be inclined with respect to the bottom plate 12. The support plate 14 further has a side piece 16 extending to a side edge thereof. The terminal plate 10 has a locking portion 11 on the side close to the bottom plate portion 12, and the locking portion 11 has a horizontal plane perpendicular to the vertical direction in which the display piece 3 moves so that the locking portion 11 can be locked. It is formed diagonally. Further, the intermediate portion 17 of the leaf spring constituting the locking portion 1 and the pressure contact portion 6 is connected to the terminal portion 2.
And the folded portion 8 is engaged with the spring supporting piece 15, and the folded portion 18 of the lock 1 is attached to the side piece 1 of the supporting piece 14.
6 is attached to the terminal 2. Reference numeral 19 denotes a connection portion with the internal electric circuit, which forms a locking hole 20 for locking the tip of the electric wire 9, and a fixed contact 21 is provided on the power supply side of the terminal portion 2. And this terminal part 2 is case 2
The second body 23 is housed in the terminal housing recess 24, and is covered with the cover 25. 26 is an electric wire insertion hole, and 27 is a display hole of the display piece 3. Note that the wire insertion gap δ is
The distance between 0 and the locking spring portion 4 is smaller than the outer shape of the electric wire 9.

The display piece 3 has a pressing portion 28 which is movably arranged in the direction of pressing the display spring portion 5 and presses the display spring portion 5 and is locked while the display spring portion 5 is pressed. It has an elastic latch plate 30 having a hook receiving portion 29 that hooks on the portion 11, and is pressed by the distal end of the electric wire 9 that has entered between the locking spring portion 4 and the terminal plate 10. The hook is removed. The pressing portion 28 is a display spring portion 5.
And the locking spring portion 4 is pushed by about 0.2 to 0.3 mm in a state where the hook receiving portion 29 is hooked on the locking portion 11. The pressing portion 28 is inserted into the display hole 27 of the cover 25 so as to be freely protruded and retracted, and the pressing portion 28 is hung inward of the cover 25. The latch receiving portion 29 of the latch plate 30 has a square hole as an example. 33 is a display button section.

In the circuit breaker, reference numeral 31 in FIG. 2 denotes a known mechanism which opens and closes the movable contact 32 with respect to the fixed contact 21 by operating the handle 34 and opens the trip by a trip operation interlocked with the abnormal current detecting means. is there. FIG. 1 shows a state in which the electric wire 9 is not inserted, and the display button 33 is in the display hole 2.
I'm immersed in 7. In this state, the display button section 33 is pushed into the display hole 27 with a jig such as a driver, and the pressing section 28 is pressed.
Is performed by locking the hook receiving portion 29 to the locking portion 11 in a state where the display spring portion 5 is pushed in. FIG. 6 shows a state in which the wire 9 is being inserted between the locking spring portion 4 and the terminal plate 10.
FIG. 7 shows a state in which an electric wire 9 is further inserted and a latch plate 30 is inserted at its tip.
In a state in which the hook receiving portion 29 is detached from the locking portion 11. FIG. 8 shows a state in which the display piece 3 has begun to move in the direction protruding from the display hole 27 by the display spring 5 due to the latch plate 30 coming off from the locking portion 11. FIG. 9 shows a state in which the distal end of the electric wire 9 is locked in the locking hole 20 and a state in which the display button portion 33 of the display piece 3 is protruded to the maximum. It can be seen from the outside that the wire 9 is locked and connected at an appropriate position by the protrusion of the display piece 3.

On the other hand, when pulling out the electric wire 9, the electric wire 9 is pulled out while rotating. According to this embodiment, the non-connected state is displayed by pressing the display piece 3 and pressing the display spring portion 5 with the pressing portion 28 to lock the hook receiving portion 29 with the locking portion 11. When the electric wire 9 is inserted into the electric wire insertion gap δ and the latch plate 30 is pushed with the tip, the hook receiving portion 29
The display portion 3 is moved by the pressing portion 28 being pressed by the display spring portion 5. As a result, the electric wire 9 is locked by the locking spring portion 4 and pressed against the terminal plate 10 to be in a connected state, and the connection state is displayed by moving the display piece 3. For this reason, a uniform connection state can always be ensured, and the work time can be shortened, leading to reduced construction.

Although the display piece 3 is frictionally locked in the display hole 27, a retaining means for preventing the display piece 3 from coming out of the display hole 27 may be provided. Second embodiment of the present invention
The embodiment of the present invention is different from the first embodiment in that the wire insertion gap δ is
The locking spring portion 4 is pressed by a part of the pressing portion 28 so that the outer diameter of the lock spring portion 4 is equal to or larger than the outer diameter of the lock spring portion 4. In the embodiment, the locking spring 4 is set to 0.
It is pushed about 6 to 0.7mm. According to this, the electric wire 9
Can be smoothly inserted without receiving the resistance of the locking spring portion 4, the latch plate 30 is pushed by the tip of the electric wire 9 to release the hook receiving portion 29 from the locking portion 11, and the display piece 3 moves. Since the locking spring portion 4 bites into the electric wire 9 and locks it, there is no fear that the insertion of the electric wire 9 is incomplete, and the work can be easily performed even at a shallow place in the panel.

[0015]

According to the terminal device of the present invention, the non-connected state is displayed by pressing the display piece, pressing the display spring portion with the pressing portion and locking the hook receiving portion with the locking portion. Is inserted into the wire insertion gap, and the latch plate is pushed by the tip, the hook receiving portion is disengaged from the locking portion, and the pressing portion is pushed by the display spring portion, so that the display piece moves. As a result, the electric wire is locked by the locking spring portion and pressed against the terminal plate to be in a connected state, and the connection state is displayed by moving the display piece. For this reason, a uniform connection state can always be ensured, and the working time can be shortened.

According to a second aspect of the present invention, in the first aspect, the wire insertion gap is equal to or larger than the outer diameter of the wire in a state where the locking portion is hooked on the hook receiving portion. In order to press the locking spring portion with a part of the pressing portion,
The wire can be inserted smoothly without receiving the resistance of the lock spring when inserting the wire, and the latch spring is released from the lock by pressing the latch plate with the end of the wire, and the display piece is moved, so that the lock spring is Since the wire is engaged and locked, there is no risk of incomplete insertion of the wire, and work can be easily performed even in shallow places within the panel.

[Brief description of the drawings]

FIG. 1 is a sectional view of a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the circuit breaker.

FIG. 3 is a partially cutaway side view of the circuit breaker.

FIG. 4 is a plan view of the circuit breaker.

FIG. 5 is a front view of the circuit breaker.

FIG. 6 is a cross-sectional view during insertion of an electric wire.

FIG. 7 is a cross-sectional view in a state where an electric wire is further inserted.

FIG. 8 is a cross-sectional view showing a state where an electric wire is further inserted.

FIG. 9 is a cross-sectional view showing a state where a maximum amount of an electric wire is inserted.

FIG. 10 is a partially cutaway side view of a circuit breaker to which a conventional example is applied.

FIG. 11 is a plan view of the circuit breaker.

FIG. 12 is a front view of the circuit breaker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lock part 2 Terminal part 3 Display piece 4 Lock spring part 5 Display spring part 9 Electric wire 10 Terminal plate 11 Lock part 28 Pressing part 29 Hook receiving part 30 Latch plate

Claims (2)

(57) [Claims] 1. A lock portion having a display spring portion adjacent to a lock spring portion, and a terminal plate disposed opposite to the lock spring portion via a wire insertion gap, and a locking portion provided on the terminal plate. A terminal portion provided with a locking portion having a pressing portion which is movably arranged in a direction of pressing the display spring portion and presses the display spring portion, and which presses the display spring portion. An elastic latch plate having a hook receiving portion that is hooked on the wire is pressed by the tip of the electric wire that has entered between the locking spring portion and the terminal plate, and the hook of the hook receiving portion is released. Terminal device provided with a display piece. 2. A part of the pressing portion presses the locking spring portion so that the wire insertion gap is equal to or larger than the outer diameter of the wire in a state where the hook receiving portion is hooked on the locking portion. The terminal device according to claim 1.