JPS6030A - Overcurrent protector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an overcurrent protector capable of cutting off current supply to a load when an excessive load current flows through an electric circuit.

[Background technology]

Traditionally, circuit breakers have been installed between a power source and a load to cut off the current supply from the power source to the load when an excessive load current flows. structure has been proposed. however,
This conventional example has problems in that the structure is complicated, the device becomes large, the weight increases, and the number of parts increases, resulting in an increase in cost.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned points.
It has a small number of parts and is easy to assemble.

A small, lightweight, and inexpensive overcurrent protector? The purpose is to provide

[Disclosure of the invention]

The following is the structure of the present invention? To explain the illustrated embodiment, as shown in FIGS. 1 to 5, a movable contact (2) is mounted on the free end of a movable contact fi+ and a movable contact +II which are pivotally supported so as to be able to rotate once. , a fixed contact (3) that comes into contact with and separates from the movable contact (2) by the rotation of the movable contact (1), and a fixed contact (3) that makes contact and separates from the movable contact (2) and the fixed contact +3).
, the movable contact (1) moves in the direction in which the movable contact (2) and the fixed contact (3) are separated. The biasing and returning spring (4) and one end? A bimetal (5) that is fixed and the other end is entirely free, an external connection terminal (6) of the fence 1 connected to the fixed end of the bimetal (5), and a second external connection terminal connected to the fixed contact (3). -ll on the free end side of the connecting terminal (7) and the bimetal (5).
11 is connected, and the flexible element connected to the curved end fully movable contact (1)? It rotates in conjunction with the conductive member (8), such as a braided wire, and the movable contact il+, and is always connected to a bimetal (5).
) is in contact with the free end of the movable contact t11? Movable contact (
A locking piece (9) is provided at a position where 2) and the fixed contact (3) come into contact, and releases the holding of the movable contact fi+ without coming into contact with the free end of the bimetal (5) when an overcurrent is applied. and? It is something that you have. Is the body of the overcurrent protector insulating? The body (II) includes a bimetal mounting bracket (+2) integrated with the first external connection terminal (61), and the second external connection terminal (7). A fixed contact mounting bracket (13) is installed upright, which is integrated with the U-shaped contact [11 is a support frame (14)]
One end is completely fixed to a rotating shaft (15) made of an insulator which is supported on the rotary shaft, and a movable contact (2) and a fully fixed contact (3) are fixed to the other end so as to face the fixed contact (3).

A screw insertion hole (161ff) is provided in the bottom piece of the support frame (14), and the support frame (14) is fixed on the body (11) by a mounting screw that is screwed into a screw hole 07 formed in the body (11). ing. The rotating shaft (15) is equipped with a movable contact (]).

A locking piece (9) is attached so as to protrude in the radial direction. As shown in Fig. 2, this locking piece (12) normally comes into contact with the free end of the J''l inlet 05, and the movable contact (11?) is placed at the position shown by the solid line in Fig.
It is to be kept as such. At this time, the movable contact tl+ is deformed in a bowed manner to secure the hook pressure at the contact between the movable point (2) and the fixed contact (3). In this type of egg, the current from the power supply to the load flows from one side connecting terminal (6) to the bimetal (5), the conductive member (8), and the movable contact (l).
), the movable contact (2)% is added to the other external readout ☆HM element (7) via the fixed contact (3). By the way, if this current becomes excessive and the bimetal (5) becomes unevenly heated.

The free end of the bimetal (5) is shaped like VC7#' in the direction indicated by arrow P in FIG. When the free end of the bimetal (5) and the locking piece (9) are disengaged in this way, the movable contact (1) is urged in the release direction by the return spring (4) as described above. Therefore, it is rotated to the position shown by the broken line in FIG.

Therefore, the movable contact (2) and the fixed contact 31 are separated, and the sweat-proof supply from the power source to the load is cut off. Next, what is the cause of overcurrent occurrence at load 111J? Remove the lightning to the load, and when the b positive supply is fully resumed, vc.

Insert a hinge-like operating piece through the set hole (field) on the upper surface of the case (10) and press it by the length of the protrusion (19) made of insulator attached to the rotation shaft (15). Return spring (4) to the movable contact ill' to the position shown
It is made to rotate once against the urging force of. 4 and 5 show other embodiments of the present invention, in which fixed contacts (
'A) What is the height of the fixed contact mounting bracket (13) and the quality of the bimetal (5)? As shown in FIG. 4, the width can be made smaller than in the case of FIG. 2 by setting different heights. If the tree nut is in GVAI, a fine protrusion I is provided below the reset hole (18).
I! 11 is attached to the upper side of the base portion of the movable contact il+.

〔Effect of the invention〕

It is constructed such that the end of the J is slanted upward, and the '5'r movable contact is freely pivoted on the same plane, the movable contact is attached to the free end of the Machi I1IJ contact, and the 5TIIiIJ contact 1 [A fixed contact that makes contact with the movable contact and separates by sword movement, and a return bar that biases the movable contact in the direction that the movable contact and the fixed contact are separated, one end is fully fixed and the other end is A bimetal with a free end and a first one connected to a fixed end of the bimetal.
an external connection terminal of m2 connected to the fixed contact, and a fully flexible conductive member having one end connected to the free end side of the bimetal and the other end connected to the 5F movable contact; It rotates in conjunction with the movable contact, and normally contacts the free end of the bimetal, and holds the movable contact for one moment each time the movable contact and the fixed onomatopoeia come into contact. In 1, what is the locking piece that releases the holding part of the movable contact without coming into contact with the free end of the bimetal? Compared to conventional circuit breakers, which have a large number of complicated components such as links and movable frames, it is easy to assemble, compact, lightweight, and manufactured at low cost. There is.

In addition, in the present invention, 5: unless the 41st conjunction between Imetal's 1st piece and 2nd piece of I-type l is out of alignment, a trip song will not be created, so vibration resistance and impact resistance will be improved. effective. Furthermore, the present invention also includes the following: 5i
The load required when performing @IIJ operation is the load of the locking piece applied in the longitudinal direction of the bimetal multiplied by the coefficient of friction between the locking piece and the free end of the bimetal, so the load is too large. Continuously. Is it the characteristic of trituzu movement that there are few factors that cause variations in load like this? This also has the effect of being able to be realized with high precision.

[Brief explanation of drawings]

Fig. 1 is a perspective view of one embodiment of the present invention, Fig. 2 is a vertical sectional view of the same as above, Fig. 6 is a partially transparent plan view of the same north, and Fig. 4 is a perspective view of another embodiment of the present invention. The exploded perspective view and FIG. 5 are longitudinal sectional views of the same. ill rri movable contact, (2) can be placed 03 contact, (3
) is a fixed contact, (4) is a return spring, (5) is a bimetal, +6) (71 external 11 pin connection terminals, (8) is a conductive part, and (9) is a locking piece. Agent: Patent attorney Stone 1) Long Upper Fig. 1 4 12 Fig. 2 Fig. 3

Claims (1)

[Claims] +11 A movable contact rotatably supported, a movable contact resting on the free end of the movable contact, a bimetal serving as the movable contact end, and a first external connection connected to the fixed end of the bimetal. a terminal, a second external connection terminal connected to the fixed contact, a flexible conductive member whose -Q is connected to the free end of the bimetal, and whose other end is connected to the movable contact; and a movable contact. The movable contact rotates in conjunction with the contact and always contacts the free end of the bimetal to hold the movable contact in a position where the movable contact and fixed contact contact, and when overcurrent is applied, it moves without contacting the free end of the bimetal. An overcurrent protector comprising a locking piece for releasing the holding of the contact.