JPH0244436Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a switch switching device for household electrical equipment, etc.

<Prior Art> Conventionally, in household electric appliances, such as microwave ovens, as shown in FIGS. 3a to 3d,
The switching piece 2a of the switch 2 arranged on the board 1 is switched by the operating lever 8. In this case, the ball 4 on the leaf spring 1a of the board 1 fits into the fitting hole 5 of the operating lever 8, thereby locking the switch. is being carried out.

However, in the above structure, the lock switching is
Since this is done manually by the user, there is a drawback that due to an erroneous operation, the ball 4 may not fit into the fitting hole 5 and cooking may be performed before the switch is switched, confusing defrosting cooking and heating cooking. Ta.

<Purpose> Therefore, the present invention aims to provide a switching device that can perform switch switching smoothly and reliably.

<Embodiment> Hereinafter, an embodiment in which the present invention is applied to a microwave oven will be described with reference to FIGS. 1 a to d and FIG. A rotation axis is provided on one surface of the board 1 between the board 1 for mounting the wired switch 2, the closed position X in which the switch is in pressure contact with the switching piece 2a, and the open position Y in which it is separated from the switching piece 2a. 16
An operation lever 8 pivotably supported for switching via
and an operating lever guide groove 9 formed on the substrate 1.
and an actuator 15 slidably supported on the sliding case 10 on the other side of the substrate 1 along the guide groove 9.
A ball 4 that slides along the guide groove 9 on the other surface of the substrate 1, and a spring 11 for urging the ball 4 toward the guide groove 9, one of which is fixed to the ball 4. an operating shaft 8b whose other end passes through the guide groove 9 and is connected to the operating lever 8;
A fitting hole 12 for holding the operation lever in the closed position, in which the ball 4 is fitted by the biasing force of the spring 11, is formed on the outer periphery of the guide groove 9 on the closed position A return spring 13 for urging in the Y direction is locked at one end to the operating lever 8 and at the other end to the board 1, and the urging force of the return spring 13 is greater than the force for holding the operating lever 8 in the closed position. is set to small.

A rotating shaft 16 is fixed to the upper end of the operating lever 8, and a switching piece pressing portion 8a of the switch is formed adjacent to the rotating shaft 16. Further, the sliding case 10 is fixed to the other surface of the base 1,
An actuator sliding groove 14 is formed on the rear end surface of the case 10, and a rear end knob mounting portion 15a of the box-shaped actuator 15 installed inside the sliding case 10 is connected to the sliding groove 1.
4 and protrudes outward. Also, actuator 1
5 is a storage hole 15 for storing the ball 9 on one side thereof.
b is formed, and the compression spring 11 is interposed between the rear wall 15c of the storage hole 15b and the ball 9.

Further, the guide groove 9 is formed linearly in the horizontal direction on the substrate 1, and a long hole 1 is formed at the lower end of the operation lever 8.
7 is formed, and the operating shaft 8b is fitted into the elongated hole, allowing the operating lever 8 to swing around the rotating shaft 16. Further, the rotation shaft 16 is connected to the substrate 1.
It is supported by a bearing so that it can rotate freely and move freely in the front and rear directions. Further, the fitting hole has a diameter larger than the groove width of the guide groove 9 on one side of the guide groove 9. In addition, 18 in the figure is an operation knob attached to the actuator 15.

In the above configuration, when using switch 2
When switching from OFF to ON, grasp the knob 18 and move the actuator 15 toward the closed position against the return spring 13. Then, the operating lever 8 connected to the actuator 15 rotates clockwise about the rotation shaft 16, and its pressing portion 8a presses against the switch switching piece 2a. At this time, the actuator 15 slides inside the sliding case 10 against the return spring 13 and the compression spring 11, and the ball 4 is located in the fitting hole 12. Then, the ball 4 is fitted into the fitting hole 12 by the biasing force of the spring 11, and the switch 2 is maintained in the ON state. At the same time, the operating lever 8 is also pushed by the compression spring 11 and moves in the direction away from the substrate 1 together with the rotating shaft 16, as shown in FIG. 1b. At this time, the return spring 13
is in an extended state, but since the force with which the ball 4 is held in the fitting hole 12 by the biasing force of the spring 11 is greater than the biasing force of the return spring 13, the operating lever 8
maintains a closed position.

Next, when switching the switch 2 from ON to OFF, grasp the knob 18 that is in the ON state and press the ball 4.
The operating lever 8 is moved slightly toward the open position by overcoming the holding force. Then, as the actuator 15 moves in the horizontal direction, the ball 4 housed in the actuator 15 overcomes the biasing force of the spring 11 and separates from the fitting hole 12. At the same time, due to the restoring force of the extended return spring 13, the operating lever 8 suddenly rotates toward the open position Y direction and separates from the switch switching piece 2a.

In this way, the switch 2 is switched from OFF to ON when the tensile force of the operating lever 8 overcomes the tension of the return spring 13, and the switch 2 is switched from OFF to OFF.
Since the switching is performed by the restoring force of the return spring 13, the operating lever 8 does not stop midway, thereby preventing the user from erroneously operating the switch 2, and switching is performed smoothly.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that modifications and additions can be made within the scope of the present invention. For example, the ball 4 in the above-mentioned embodiments may have a hemispherical shape or the like.

<Effects> As is clear from the above description, the present invention provides a circuit board for mounting a switch, a closed position in which the switch is in pressure contact with the switching piece, and an open position in which it is separated from the switching piece. An operating lever is rotatably supported on one side via a rotation shaft, an operating lever guide groove formed on the board, and a sliding case on the other side of the board that slides along the guide groove. a movably supported actuator; a ball slidably engaged on the other surface of the substrate along the guide groove and connected to the operating lever; and urging the ball toward the guide groove. A fitting hole is formed on the outer periphery of the guide groove on the closed position side, and a fitting hole is formed on the outer periphery of the guide groove on the closed position side, and the ball is fitted into the ball by the biasing force of the spring. The present invention relates to a switch switching device characterized in that a return spring is provided for biasing the operating lever in a posture direction, and the biasing force of the return spring is set to be smaller than a force for maintaining the closed posture of the operating lever.

Therefore, according to the present invention, since the switching of the switch is performed by the ball and the return spring, switching errors can be prevented, switching can be performed smoothly, and malfunctions of the main body actuating section can be eliminated. effective.

[Brief explanation of drawings]

FIG. 1a is a front view of the operating lever 8 in the open position in an embodiment in which the present invention is applied to a microwave oven, FIG. 1b is a vertical side view thereof, and FIG. 1c is a front view of the operating lever 8 in the closed position. 1d is a vertical side view of the microwave oven, FIG. 2 is a perspective view of the microwave oven, FIG. FIG. 3c is a front view of the operating lever 8 in the closed position, and FIG. 3d is a front view of the operating lever 8 when it malfunctions. X: Closed position, Y: Open position, 1: Board, 2: Switch, 2a: Switch switching piece, 4: Ball, 6:
Main body, 7: Operating section, 8: Operating lever, 8a: Operating shaft, 9: Guide groove, 10: Sliding case, 11: Spring, 12: Fitting hole, 13: Return spring, 18: Knob.

Claims (1)

[Scope of utility model registration request] A board for mounting a switch, and a rotatable pivot on one surface of the board for switching between a closed position in which the switch is in pressure contact with the switching piece and an open position in which it is separated from the switching piece. the operating lever,
An operating lever guide groove formed on the substrate, an actuator supported by a sliding case on the other side of the substrate so as to be slidable along the guide groove, and an actuator supported on the other side of the substrate along the guide groove. a ball that is slidably engaged and connected to the operating lever; and a spring that biases the ball toward the guide groove, the ball being fitted by the biasing force of the spring. A fitting hole for maintaining the operating lever in the closed position is formed on the outer periphery of the guide groove on the closed position side, and a return spring is provided for biasing the operating lever in the open position direction;
A switch switching device characterized in that the biasing force of the return spring is set to be smaller than the force for holding the operating lever in a closed position.