JPS6142259Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an opposite contact type switch device.

Conventionally, the movable contact of this type of switch is provided at the tip of a leaf spring, and when the switch is turned off, the movable contact is separated from the fixed contact by the spring force of the leaf spring. However, in such a configuration, if the contact transfer is large or a welding phenomenon occurs, the spring force of the leaf spring will not allow the movable contact to separate from the fixed contact and will remain in close contact with the fixed contact to continue energizing the load. In some cases, there were problems that caused wiring to burn out due to overcurrent.

The present invention was devised in view of the above circumstances, and its purpose is to provide an opposite contact type switch device in which the movable contact piece is reliably separated from the fixed contact piece when the switch knob is turned off. .

An embodiment of the present invention will be described below with reference to the drawings. 1 is a switch base made of insulating material,
2 and 3 are fixed contacts, 4 is a leaf spring punched into a substantially U-shape, and movable contacts 5 and 6 are caulked and fixed to the tips of the leaf spring 4, and the base ends of the leaf spring 4 are attached to rivets 7, 7. and is fixed to the switch base 1. Reference numeral 8 denotes a switch case fixed to the switch base 1, and shaft portions 9a, 9a of a switch knob 9 are rotatably inserted into horizontal holes 8a, 8a of this switch case. Reference numerals 10 and 10 denote pressing parts protruding from the lower surface of the switch knob 9, which are separated from the leaf spring 4 when the switch knob 9 is operated in the direction of arrow A, and are separated from the leaf spring 4 when the switch knob 9 is operated in the direction of arrow B. 4 is pressed down to bring the movable contacts 5 and 6 into contact with the fixed contacts 2 and 3, respectively. 1
Reference numeral 1 designates a cylindrical portion protruding from the lower surface of the switch knob 9, into which an indenter 13 is inserted via a compression coil spring 12.
is slidably inserted. Reference numeral 14 denotes a chevron-shaped protrusion protruding from the upper surface of the switch base 1, and this is provided at a position where it faces the indenter 13 when the switch knob 9 is rotated to a position approximately in the middle of its rotation range. , holding protrusions 1 are provided on both sides of this protrusion 14.
5, 15 and 16, 16 are provided protrudingly, respectively.
17 is a moderation plate as a moderation body having convex portions 17a, 17a inserted between the holding convex portions 15, 15 and 16, 16; The indenter 13 is brought into contact with the upper surface of the moderation plate 17 while being held therebetween, and the lower surface of the moderation plate 17 is pressed against the upper end of the protrusion 14 . 18,
Reference numeral 18 denotes a leaf spring drive unit that extends integrally with the moderating body 17, and these are located opposite to each other on the lower surface side of the intermediate part of the leaf spring 4.

When the switch knob 9, which is in the OFF state, is rotated in the direction of arrow B, the indenter 13 moves against the moderation plate 17.
Since it slides on the top in the direction of arrow C, when the indenter 13 passes the position corresponding to the highest part of the protrusion 14, the moderation plate 17 momentarily rotates in the direction of arrow D. When the moderation plate 17 rotates in the direction of arrow D, the indenter 13 is prevented from sliding down the moderation plate 17 in the direction of arrow C, and the operating force of the switch knob 9 becomes lighter, giving a sense of moderation.On the other hand, the switch knob 9 is compressed. The spring force of the coil spring 12 continues the rotation in the direction of arrow B, and based on the rotation of the switch knob 9 in the direction of arrow B, the pressing parts 10, 10 push down the intermediate part of the leaf spring 4, thereby closing the movable contact. 5 and 6 are brought into contact with the fixed contacts 2 and 3, respectively, and the moderation plate 17 is rotated in the direction of arrow D as described above, so that the leaf spring driving parts 18, 18 are brought into contact with the switch base 1 and the leaf spring drive parts 18 are brought into contact with the fixed contacts 2 and 3, respectively. 4 (see Fig. 3). Next, when the switch knob 9 is rotated in the direction of arrow A from the ON state as described above, the indenter 13 will slide on the moderation plate 17 in the direction of arrow E, and the indenter 13 will move to the highest part of the protrusion 14. When the moderation plate 17 passes through a position corresponding to
0 and 10 are separated from the leaf spring 4. That is, as described above, when the moderation plate 17 rotates in the direction of arrow F, the switch knob 9 is given a sense of moderation, but as the pressing parts 10, 10 are separated from the leaf spring 4, the plate normally The movable contacts 5 and 6 are separated from the fixed contacts 2 and 3 by the spring force of the spring 4, and are turned off. However, if the movable contacts 5 and 6 are in a welded state with the fixed contacts 2 and 3, the leaf spring driving parts 18 and 18 of the moderation plate 17 rotated in the direction of arrow F will move to the intermediate part of the leaf spring 4. However, the elastic force of the coil spring 12 acts on the moderation plate 17 via the indenter 13, and the moderation plate 17
is rotated in the direction of arrow F with a strong force, the leaf spring driving parts 18, 18 forcefully push up the middle part of the leaf spring 4, and the movable contacts 5 and 6 move away from the fixed contacts 2 and 3. separated.

As is clear from the embodiments described above, the present invention provides a plate spring driving section in a moderation plate which is rotated back and forth in response to the operation of a switch knob to give a sense of moderation to the switch knob. Since the movable contact that is in close contact with the fixed contact is forcibly separated by the movement of It is possible to provide an opposite contact type switch device that operates extremely reliably, does not cause wire burnout, and is extremely reliable.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional front view, Fig. 2 is a longitudinal sectional side view, Fig. 3 is a longitudinal sectional front view in an operating state different from that of Fig. 1, and Fig. 4 is an exploded perspective view. In the drawings, 1 is a switch base, 2 and 3 are fixed contacts, 4 is a leaf spring, 5 and 6 are movable contacts, 9 is a switch knob, 10 is a pressing portion, 12 is a compression coil spring, 13 is a pressure element, 17 is a detent plate (detent body), 18 is a switch base, 20 is a switch knob, 22 is a switch knob, 24 is a switch knob, 26 is a switch knob, 28 is a switch knob, 29 is a switch knob, 30 is a switch knob, 31 is a switch knob, 32 is a switch knob, 33 is a switch knob, 34 is a switch knob, 3
is the leaf spring drive.

Claims (1)

[Scope of utility model registration request] A leaf spring having a fixed contact and a movable contact capable of approaching and separating from the fixed contact at its tip, and a switch knob having a pressing portion that presses and releases the leaf spring to bring the fixed contact and the movable contact into contact with and separate from each other. An indenter provided on the switch knob, a moderation body that is rotated back and forth based on the reciprocating movement of the indenter by operation of the switch knob and gives a sense of moderation to the operation of the switch knob, and a moderation body that corresponds to the leaf spring. a leaf spring drive part provided on the moderation body and configured to forcibly move the movable contact in a direction away from the fixed contact when the pressing part releases the pressure on the leaf spring by operating the switch knob in one direction; A switch device equipped with.