JPH0719650B2 - Input device - Google Patents

Description

TECHNICAL FIELD The present invention is suitable for electric appliances used in general households, such as electric cookers and washing machines, which use solutions and water, and vacuum cleaners and other equipment used in dusty places. Closed and rigid input device.

2. Description of the Related Art Conventionally, an input device of this type of device is provided with electrodes on the front and back of glass, a capacitive touch control input device that detects a change in capacitance when a user touches it, and a plastic film. There is a membrane type input device that accepts input settings by combining the switches inside and pressing lightly.

The problem to be solved by the invention is that the former one is used only in some high-end products due to the deviation of the sensitivity depending on the usage condition and the high price, and the latter one is a plastic surface only. Therefore, a sharp tool such as a knife may be used together with a cooker, or a product such as a vacuum cleaner that may hit the corners of another object may have mechanical cracks and the sealing performance cannot be guaranteed. . Further, if it is a cooking device, high temperature cooking such as tempura is performed nearby, so that a higher heat resistance is required due to attachment of oil droplets.

In this way, with the conventional structure, it can occur during actual use,
The present invention solves the problem that the sensitivity shifts and the surface cracks and thermal deformations occur due to the change in the use state, and the reliability in actual use becomes low.

Means for Solving the Problems The technical means of the present invention for solving the problems is to seal with a non-magnetic support plate, insert a magnet in the operation knob, and seal the position of the knob with the support plate. The magnetic field detecting element detects the magnetic field from the inside, and the operation is performed according to the position of the knob, and the position of the knob is fixed so as not to be displaced at a specific position.

Action The action of this technical means is as follows. That is,
Since the distribution of the magnetic field generated by the magnet attached to the knob changes depending on the position of the knob, the position can be detected in a non-contact manner by the magnetic field detection element inside the main body (inside the support plate). or,
When the knob reaches a specific position, the knob is lifted up along the step of the groove due to the repulsive magnetic field, and the position is not displaced thereafter.
To change the position of the knob, push the knob with a force stronger than the magnetic repulsion and slide it. By this action, it is not necessary to provide an opening in the support plate, and the position detection and position fixing of the knob can be ensured.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

The operation knob 1 has a collar 1a protruding in a direction perpendicular to the sliding direction as shown in the third. As is apparent from the side and front views, the knob 1 is slidable by fitting its flange 1a into the groove 3 provided in the non-magnetic metal plate 2.

When the knob 1 comes to the right end in FIG. 1, it receives a DC magnetic field from the permanent magnet 4 fixed at that position. If the upper surface of the permanent magnet 4 is fixed to match the N pole when the lower surface of the knob has the N pole, a repulsive magnetic field is generated and the knob 1 moves upward. Since the groove 3 is wide at the right end, the knob 1 does not move in the horizontal direction after being deviated upward, and therefore the setting does not shift due to some external force (such as vibration or shock) during standing. . On the other hand, inside the support plate 2 (inside the main body), a plurality of magnetic field detecting elements 5a to 5d for detecting the position of the knob 1 are fixed, and a signal is generated by the magnetic field of the knob 1 which is in proximity to the controller 6 to generate a signal. Since the position signal of the knob 1 is supplied, the device can be controlled according to the position of the knob 1. In this embodiment, a reed switch or hall element that can detect a DC magnetic field can be used.

Therefore, in the above embodiment, the knob 1 located at the right end is
It can be set to the position 1'by pushing it downward and then sliding it horizontally. If necessary, a combination of the groove structure at the right end and the permanent magnet can be made to fix at a plurality of locations.

4 and 5 show another embodiment in which the operability is further improved. The support plate 2 is provided with a plurality of indentations 8 other than the right end and is dimensionally fitted to the convex portion of the flange of the knob as shown in the perspective view of the knob of FIG. 2b.

On the other hand, a magnetic material, for example, an iron plate 7 is fixed to the lower side of the support plate 2, and a repulsive magnetic field is applied to the entire sliding path of the groove 3 by the permanent magnet 4 fixed to the right end of the iron plate 7. Therefore, since the knob 1 is pressed against the upper portion of the groove 3 by applying a repulsive force from below regardless of where it is, a click feeling is generated at the point of the recess 8 of the groove 3 during sliding, and for example, the output If it is set to correspond to the positions such as “weak”, “medium”, and “strong”, the setting is easy and the usability is good.

FIG. 6 shows a perspective view when applied to an electromagnetic induction heating cooker. As described above, particularly when applied to a cooking device, the input device is excellent in heat resistance and mechanical properties and has good cleaning property.

EFFECTS OF THE INVENTION Since the present invention is an operating section that is completely sealed by forming an outer shell with a non-opening non-magnetic plate, it is possible to completely prevent the ingress of water even if it is attached to the upper surface of the device for operability. Moreover, the following effects are achieved.

(1) Since it can be made of metal (aluminum, stainless steel, etc.), it has high heat resistance and mechanical strength, and there is no fear of electric shock.

(2) Not only has a simple structure and is inexpensive, but it also has few wear parts and has a long life.

(3) Since the operation unit is provided on the upper surface, the settings are easy to see and the usability is excellent.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part showing an embodiment of the present invention.
FIG. 4 is a front sectional view of an essential part, FIG. 3 is an external perspective view of the operating knob, FIG. 4 is a side sectional view of an essential part of another embodiment, and FIG. 5 is an external perspective view of the operating knob. The figure is a perspective view of a cooking device using the present invention. 1 ... Operation knob, 2 ... Support plate, 3 ... Groove (sliding locking part), 4 ... Permanent magnet (repulsive magnetic field generating element), 5a, 5b, 5
c, 5d ... Magnetic field detection element.

Claims (1)

[Claims] 1. An operating knob which generates a DC magnetic field and is slidable, a support plate which is non-magnetic and has a sliding engaging portion which slidably holds the operating knob, and an inside of the supporting plate. The operation knob is provided with a magnetic field detection element for detecting the position of the operation knob, and a repulsion magnetic field generation element for generating a reverse magnetic field repulsive to the magnetic field of the knob is arranged inside the support plate, and An input device that levitates and locks from the sliding lock part by the repulsive magnetic field when it comes to the place corresponding to the generating element.