Contactless push button switch
阅读：41发布：2023-02-14
专利汇可以提供Contactless push button switch专利检索，专利查询，专利分析的服务。并且A contactless push button switch comprising a magnetic circuit including a magnet, stationary yokes, a movable yoke and a fieldsensitive element (such as reluctance effect element, hole effect element, SMD, etc.), said magnetic circuit being disposed between a button cover and a base of the switch. By depressing the button cover the movable yoke is caused to undergo a physical change, thereby extremely reducing the density of the magnetic flux penetrating the field-sensitive element to cause a change of the terminal voltage or electro-motive force across the fieldsensitive element so as to bring about the switching action of the switch.，下面是Contactless push button switch专利的具体信息内容。
1. A contactless push button switch comprising a box-shaped switch button-cover having an open bottom and at least one leg extending downwardly from the inside of the top wall of saiD switch button-cover, a switch base located below and adapted to fit within said switch button-cover, said switch base being formed with at least one opening, each of said legs of said switch button-cover being guided through one of said openings, a spring mounted on each of said legs, each of said springs providing restoring force against the displacement of said switch button-cover toward said switch base, an elongated magnet lying on top of said switch base and within said switch button-cover, said magnet extending horizontally and being provided at opposite ends with fixed yokes, the second one of which extends above said magnets, a field-sensitive element fixed on the inner side of a portion of the second one of said fixed yokes, said fieldsensitive element being in contact with both said second fixed yoke and said magnet, and a movable yoke pivotally supported on top of the first one of said fixed yokes, said movable yoke having a portion on the side of the pivotal support point nearer to said field-sensitive element which constitutes a magnetic circuit together with said field-sensitive element, said switch button-cover having an inwardly projected portion adapted to push down the portion of said movable yoke extending on the other side of said pivotal support point to pivot said movable yoke and break said magnetic circuit when said switch button-cover is depressed against the forces of said springs.
2. The contactless push button switch according to claim 1, wherein each of said legs is provided on the side of said switch base opposite said switch button-cover with a projection serving as a stopper and said projections also serve to prevent the vibration of said switch button-cover when said switch button-cover is depressed and ensure reliable downward displacement of said switch button-cover.
3. The contactless push button switch according to claim 2 wherein each of said projections is a cotter pin.
4. A contactless push button switch comprising a switch button-cover having a leg extending from the inside face of the top wall of said switch button-cover, said switch button-cover being formed with a guide bore, a switch base formed with an opening and provided with an upright projection, said leg of said switch button-cover being guided through said opening and said upright projection extending into said bore of said switch button-cover, a spring mounted on said leg of said switch button-cover, said spring providing restoring force against the displacement of said switch button-cover toward said switch base, an elongated magnet erected over the top of said switch base, said magnet being provided at opposite ends with fixed yokes, a field-sensitive element in contact with both the upper face of the first one of said fixed yokes and a side face of said magnet, and a movable yoke pivotally supported on top of a projection of the second one of said fixed yokes, said movable yoke having a portion on the side of the pivotal support point nearer to said field-sensitive element which constitutes a magnetic circuit together with said field-sensitive element, and wherein depression of said switch button-cover against the force of said spring causes the inside face of the top wall of said switch button-cover to push down the end of a portion of said movable yoke extending on the other side of said pivotal support point to break said magnetic circuit, and wherein said leg is provided on the side of said switch base opposite said switch button-cover with a projection serving as a stopper and said projection also serves to prevent the vibration of said switch button-cover when said switch button-cover is depressed and to ensure reliable downward displacement of said switch button-cover.
5. The contactless push button switch accordingly to claim 4, wherein said projection is a cotter pin.
6. A contactless push button switch comprising a switch button-cover, a switch base, an elongated magnet lying on top of said switch base, said magnet being provided at opposite Ends with fixed yokes, the second one of which extends beyond the top face of said magnet, a field-sensitive element in contact with both the inner side of a portion of the second one of said fixed yokes extending beyond said magnet and the top face of said magnet, and a movable yoke pivotally supported on top of the first one of said fixed yokes, said movable yoke having a portion on the side of said pivotal support point nearer to said field-sensitive element which constitutes a magnetic circuit together with said field-sensitive element and a portion on the other side of said pivotal support point which extends downwardly from said pivotal support point, is then folded back upwardly and terminates in an end portion in contact with the top wall of said switch button-cover, whereby depression of said switch button-cover causes rotation of said movable yoke to break said magnetic circuit, and further comprising a second magnet whose magnetic field interacts with said magnetic circuit so that the intensity of the magnetic field in said magnetic circuit is adjustably selecting the size and material of said second magnet.
7. A contactless push button switch comprising a box-shaped switch button-cover having an open bottom and a leg extending downwardly from the inside face of the top wall of said switch button-cover, said switch button-cover being formed with a downwardly extending guide bore, a switch base formed with an opening and provided with an upright projection, said leg of said switch button-cover being guided through said opening and said upright projection extending into said bore of said switch button-cover, a spring mounted on said leg of said switch button-cover, said spring providing restoring force against the displacement of said switch button-cover toward said switch base, an elongated magnet located within said switch button-cover and erected over the top of said switch base, said magnet being provided at opposite ends with fixed yokes, a field-sensitive element in contact with both the upper face of the first one of said fixed yokes and a side face of said magnet, and a movable yoke pivotally supported on top of a projection of the second one of said fixed yokes, said movable yoke having a portion on the side of the pivotal support point nearer to said field-sensitive element which constitutes a magnetic circuit together with said field-sensitive element, and wherein depression of said switch button-cover against the force of said spring causes the inside face of the top wall of said switch button-cover to push down the end of a portion of said movable yoke extending on the other side of said pivotal support point to break said magnetic circuit.
8. A contactless push button switch comprising a box-shaped switch button-cover having an open bottom, a switch base located below and adapted to fit within said switch button-cover, an elongated magnet lying within said switch button-cover and on top of said switch base, said magnet being provided at opposite ends with fixed yokes, the second one of which extends above said magnet, a field-sensitive element in contact with both the inner side of a portion of the second one of said fixed yokes and the top face of said magnet, and a movable yoke pivotally supported on top of the first one of said fixed yokes, said movable yoke having a portion on the side of said pivotal support point nearer to said field-sensitive element which constitutes a magnetic circuit together with said field-sensitive element and a portion on the other side of said pivotal support point which extends downwardly from said pivotal support point, is folded back upwardly and terminates in an end portion in contact with the top wall of said switch button-cover, whereby depression of said switch button-cover causes the rotation of said movable yoke to break said magnetic circuit.
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