JPH0119728B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a fixed contact which is loaded by means of a spring in the direction of a fixed contact, which can be moved at right angles to the direction of movement, and which is guided in a slider. The present invention relates to a rolling contact having a contact portion that slides up onto an inclined surface of a fixed contact portion.

[Prior art and its problems]

In the known switch of the above-mentioned type (German Patent Application No. 3010579), a double bridge is provided which is held at the slider and is spring-loaded, which double bridge is fixed in the closed state. Close the contact parts. The use of this contact bridge requires relatively high dosing forces and, if dosing is carried out under unfavorable conditions, can lead to long bounce times, so that to a certain extent the tendency to weld cannot be eliminated. There was a drawback.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned switch so that even if the closing force is reduced, the jump time is reduced and the tendency of welding is reduced.

[Key points of the invention]

The present invention provides a movable contact which is loaded by a spring in the direction of the fixed contact and can move at right angles to the direction of movement, and which is guided in a slider and slides onto the ramp surface of the fixed contact. In the rolling contact element, the movable contact part consists of two roller-shaped contact parts, which are guided by the guide groove of the slider, and in which the roller-shaped contact part is guided by a scissor spring in the guide groove. is pressed in the direction of the fixed contact part, and the contact surface against the roller type contact part when the guide groove closes is deviated in a direction opposite to the direction of movement of the slider by more than 90 degrees with respect to the direction of movement. The above object is achieved by tilting in the direction.

[Embodiments of the invention]

In the case of the fuse-equipped switch shown in FIG. 1, fixed contact parts 2 and 3 are fixed by screws 4, and fixed contact part 3 is connected to a low-voltage, large-capacity fuse 5 by this screw, The two contacts are therefore connected in series. The fixed contact parts 2 and 3 are connected in electrical continuity via a roller-type contact part 6 which faces and abuts both sides of the fixed contact parts 2 and 3 and forms a movable contact. be done. The movement of the roller contact 6 takes place via a slide 7. In this slide, roller-type contacts 6 are each guided via a scissor spring 8 in such a way that they can be moved under spring load in the direction of the fixed contacts 2, 3.
Such a configuration can be better understood by referring to FIG. 3, which shows the entire slider taken out and its plan view shown. The end 9 of the scissor spring 8 is a roller-shaped contact part 6
The roller-shaped contact, located in the groove 10, is thus prevented from longitudinal movement by the scissor springs. Such a configuration can be better understood from FIG. 2, which shows a side view of only the slider and a cross section of a portion thereof. Corresponding recesses 1 on both sides of the slider 7
1 each inserted into 2 scissor springs 8
The part 12 of the roller-shaped contact between the ends 9 of
is guided through the opening 13 of the slider when sliding up the sloped surface 14 of the fixed contact parts 2, 3 (FIG. 3). In a stationary state in which the switch is not closed, the roller-shaped contact portion 6 comes into contact with the connecting portion 15 that forms the boundary of the side surface of the opening 13. Furthermore, the opening 13 is provided with an abutment surface 16 for the roller-type contact 6, as shown enlarged in FIG. It is in a direction that is more than 90 degrees. Therefore, in order to close (make) the circuit, this roller-type contact 6 is moved in the direction of the arrow 17, which has been usual in the case of known double bridge disconnectors and in the case of roller-type contacts. When the slider moves, it does not slide in the direction perpendicular to the direction of movement, but it is possible to make a very small movement in the opposite direction to the direction of movement, so that at least when closing the circuit there is a fixed contact. Not only a component force of pressure acting perpendicularly to the part but also a component force acting obliquely is generated. Opening (blocking) is performed by moving the slider 7 in the direction opposite to the arrow 17 to separate the roller type contact portion 6 from the fixed contact portion 2.

〔Effect of the invention〕

Since the abutment surface of the guide groove for the movable contact is inclined at an angle of more than 90° to the direction of movement, the roller-type contact will not move in the direction of movement when the slider moves in a given direction. It is possible to perform a very small movement in the opposite direction to the direction of movement without sliding vertically, and therefore at least only the component of the pressure that acts perpendicularly to the fixed contact part when closing the circuit. Component forces acting at an angle are also generated, as a result of which the input force is reduced and the jump time is also reduced, thereby reducing the tendency to weld without the need for particularly expensive measures. can be done.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view of a contact device incorporated in a fuse-equipped switch according to the present invention, and FIG. 2 is a slider and roller-type movable contact taken out from the fuse-equipped switch according to the present invention. FIG. 3 is a plan view showing a slider with a roller-type contact portion according to the present invention and two fixed contact portions shown separated from the slider; FIG. The figure is an enlarged view of the groove shape of the slider according to the present invention. 2, 3... Fixed contact part, 7... Slider, 8... Cylindrical coil spring, 10... Groove of roller type contact part, 1
3, 16...Slider guide groove, 14...Sliding contact slope surface, 15...Slider connecting portion.

Claims (1)

[Claims] 1. A movable contact part that is loaded by a spring in the direction of the fixed contact part and can move at right angles to the direction of movement, and that is guided in a slider and slides up the ramp surface of the fixed contact part. In the rolling type contactor, the movable contact portion is composed of two roller-type contact portions, and the roller-type contact portion is guided by a guide groove of the slider, and a fixed contact portion is connected to the fixed contact portion by a scissor spring within the guide groove. is pressed in the direction of the guide groove, and the abutment surface against the roller-shaped contact portion when the guide groove closes is inclined in a direction that is deviated from 90 degrees to the direction of movement in the opposite direction to the direction of movement of the slider. A rolling contact characterized by: