JPH0334035Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a movable contact device that is applied to circuits, disconnectors, and the like.

[Background technology]

FIGS. 9 to 11 show circuits and circuit breakers to which conventional examples are applied. In other words, 100 is the table, 10
1 is a cover, 102 is a handle, 103 is a terminal screw, 104 is a fixed contact, 105 is an arc extinguishing grid, 106 is a contact holder, 107 is a contact butt, 108 is a contact shaft, and 109 is a contact pressure applying A spring, 110 is a contact pressure shaft, and 111 is a movable contact. When the handle 102 is operated, the circuit breaker is connected to the contact holder 1 through a mechanism (not shown).
06 opens and closes, movable contact 112, fixed contact 1
13 separates. Further, when an overcurrent detection section (not shown) performs a detection operation, the mechanism section performs a trip operation, and the contact holder 106 also performs an opening operation. in this case,
The movable contact 111 rotates about the center of the contact shaft 108 and is applied to the fixed contact 11 by a contact pressure applying spring 109.
3, the contact pressure of the movable contact 112 is applied.

By the way, as shown in FIG.
3, the movable contact 111 rotates counterclockwise around the contact shaft 108 due to the spring 109 from this state, but the contact pad 107
The rotation of the movable contact 111 is restricted at the position where the stopper part 114 of the movable contact 114 contacts the locking part 115 formed by the hole of the contact holder 106, and as shown in FIG.
becomes the contact surface Y′. That is, the difference between planes Y and Y' is the push-out amount in the closed state. This pushing amount is regulated by the gap X when the stopper portion 114 and the locking portion 115 are in the closed state. The relationship between the gap X and the push-off amount Y-Y' is the ratio of the dimensions ₁ and ₂ from the contact shaft 108, that is, ₂ <
When it is ₁ , the push _- out amount = X・_1/2 .

However, in order to control this push-off amount to a constant value, it is necessary to suppress _{the variation} in The disadvantage was that it had to be managed.

[Purpose of invention]

The purpose of this invention is to provide a movable contact device that facilitates dimensional control and allows easy adjustment of the position of the movable contact relative to the contact holder.

[Disclosure of invention]

This invention includes a contact holder that opens and closes, a movable contact whose base end is pivotally supported by the contact holder, a movable contact provided at the tip of the movable contact, and a a contact pressure applying spring that is interposed between the child and the contact holder and urges the movable contact in a direction in which the movable contact is closed; and a contact pressure applying spring that is provided on the movable contact and a stopper portion that locks the movable contact in the locking portion of the contact holder when the movable contact is energized; and a stopper portion that is interposed between the stopper portion and the locking portion of the contact holder so that the contact and an adjustment member that adjusts the position of the movable contact with respect to the child holder.

According to this invention, by interposing the adjustment member between the stopper portion and the contact holder, the position of the movable contact with respect to the contact holder can be easily adjusted. Therefore, there is no need to accurately manage parts and dimensions after assembly, and management becomes easy.

Embodiment A first embodiment of this invention will be described based on FIGS. 1 to 5. That is, this movable contact device for circuit breakers will be described with particular reference to FIG. are fitted to rotatably support the contact holder 1. The contact holder 1 is provided with a connecting fitting 4 on the upper surface of its base end, and an interlocking rod 5 is connected to the connecting fitting 4 to interlock with the connecting fitting of the contact holder of the other pole (not shown) arranged adjacently. Concatenated. A shaft 6 is provided at the tip of the contact holder 1, a contact pressure shaft 7 is provided below the shaft 6, and a locking portion 8, which is an example of a hole, is provided on the upper surface of the tip. Here, 6a and 7a in FIG. 4 are E-rings for attaching the shafts 6 and 7. An adjustment member 9 is provided at the edge of this locking portion 8 .
That is, this adjustment member 9 is made by bending a metal plate, and can be attached and removed by bending a mounting piece 11 (Fig. 4) between the center hole 10 on the upper center surface of the contact holder 1 and the tip. The adjusting piece 12 is inserted into and abuts the edge of the locking part 8.

The movable contact 13 has contact pads 14 on both sides thereof.
are attached with rivets 15, and the contact piece butt 1
A hole 16 formed in 4 is fitted into the shaft 6 to support it rotatably. Further, a stopper portion 17 is formed at the rear end of the contact pad 14, and the stopper portion 17 is passed through the locking portion 8 and is locked to the adjustment piece 12. Also, movable contact 1
A movable contact 18 is provided at the tip of 3, and a fixed contact 1
Opposed to 8'. The contact pressure shaft 19 is engaged with the notch 20 at the tip of the contact pad 14, and a contact pressure applying spring 21, which is an example of a tension spring, is installed between the contact pressure shaft 19 and the contact pressure shaft 7. suspend. 22 is a fixed contact;
22' is a lead wire made of knitted wire.

With this configuration, the movable contact 13 is biased by the contact pressure applying spring 21 in the open state,
The stopper portion 17 is positioned by abutting and locking on the adjustment piece 12. In this case, by setting the thickness of the adjustment piece 12, the position of the movable contact 18 with respect to the contact holder 1 can be adjusted. In addition, when closing, the contact holder 1 rotates so that the movable contact 18 comes into contact with the fixed contact, and further rotates by the push-off amount given to the contact holder 1, causing the movable contact 18 to move around the axis. , the contact pressure applying spring 21 is pulled, and contact pressure is applied. In this way, when the ratio of the dimensions ₁ and ₂ of the movable contact 13 that regulates the amount of push-out is large, variations in the amount of push-out tend to occur due to the accuracy of each part and the accumulation of component tolerances due to combinations, but the movable contact 18 can be adjusted. Since the position is adjusted by the piece 12, it can be easily set to the standard push-off amount.
Furthermore, even if the processing accuracy of the parts is rough, by changing the thickness of the adjustment piece 12, dimensional variations can be easily absorbed in the final process, making dimensional control easier.

Figure 5 shows an outline of the case where this movable contact device is applied to a three-pole type circuit or disconnector.
In the movable contact device of the above embodiment, the interlocking rod 5 shows the terminals of which the contactor holder 1 is driven to open and close. connected to. In this mechanism part, 2
3 is a handle supported by a fixed shaft 23a, and 24 is a first handle connected to the middle part of the contact holder 1 (for convenience, the movable contact is shown integrally formed with the contact holder). A link 25 is a second link connected to the first link 24 by a shaft 26, 27 is a tension spring tensioned between the shaft 26 and the handle 23, and 29 is supported by a fixed shaft 28 and an intermediate link. a trip link connected to the second link 25 by a shaft 32 at a portion, 30 a latch link, 31
is overcurrent detection means for detecting overcurrent in the electric circuit and driving the latch link 30. Figure a shows the on state, and figure b shows the off state. When the handle 26 is turned clockwise from the on state, the spring 27 crosses the shaft 32, so the shaft 26 is pulled up by the spring 27, and the contact The holding body 1 performs an opening operation. Figure c shows an overcurrent trip state, and when the latch link 30 pulls out the trip link 29, the trip link 29
is pushed up via the second link 25 to open the contact holder 1, and when the shaft 32 intersects the spring 27, the handle 26 is rotated to the neutral position.

A second embodiment of this invention is shown in FIGS. 6-8. That is, the adjustment piece 12 is formed long,
By folding the adjustment pieces 12 as shown in FIGS. 8b and 8c, the plate thickness t can be adjusted from one to several times. According to this embodiment, it is possible to easily respond to changes in dimensional variations.

[Effect of idea]

According to this invention, by interposing the adjustment member between the stopper portion and the contact holder, the position of the movable contact with respect to the contact holder can be easily adjusted. Therefore, there is no need to accurately manage the dimensions of parts and after assembly, and there is an effect that management becomes easier.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway side view of the first embodiment of this invention, Fig. 2 is a side view thereof, Fig. 3 is a perspective view thereof, Fig. 4 is an exploded perspective view thereof, and Fig. 5 is a circuit diagram. 6 is a partial sectional view of the second embodiment, FIG. 7 is a perspective view of its adjustment fittings, FIG. 8 is a side view showing its plate thickness adjustment state, and FIG. 9 The figure is a partially sectional side view of a conventional circuit breaker, FIG. 10 is a side view of its movable contact, and FIG. 11 is a cutaway side view thereof. DESCRIPTION OF SYMBOLS 1... Contact holder, 6... Locking part, 8... Locking part, 9... Adjustment member, 13... Movable contact, 1
7...Stopper part, 18...Movable contact, 21...
Contact pressure applying spring.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A contact holder that opens and closes, a movable contact whose base end is pivotally supported by the contact holder, and a movable contact provided at the tip of the movable contact. a movable contact;
a contact pressure applying spring that is interposed between the movable contact and the contact holder and biases the movable contact in a direction in which the movable contact is closed; a stopper portion that locks on the locking portion of the contact holder when the movable contact is biased by an imparting spring; and a stopper portion that is interposed between the stopper portion and the locking portion of the contact holder. A movable contact device comprising: an adjustment member for adjusting the position of the movable contact with respect to the contact holder. (2) The movable contact device according to claim 1, wherein the adjustment member is a plate-shaped member having a predetermined thickness and is attached to the contact holder. (3) The adjustment member is a plate-shaped body having a predetermined thickness, and is attached to the contact holder and folded over the adjustment member a necessary number of times to fit between the stopper portion and the contact holder. A movable contact device according to claim (1) of the intervening utility model registration claim.