RU2704526C1 - Magnetic keyboard - Google Patents

Abstract

FIELD: data input devices.

SUBSTANCE: invention relates to the input devices. Technical result is achieved by the fact that magnetic keyboard includes a housing consisting of 4 layers, 1 layer contains fixed magnetic elements, 2 layer consists of layer with contact pads, 3 layer contains movable magnetic elements in working chambers, coated with current-conducting coating and facing similar poles to magnetic elements in 1 layer, located from each other at distance of magnetic repulsive forces, 4 layer contains buttons with magnetic elements facing similar poles to magnetic elements in 3 layer, located from each other at distance of magnetic repulsive forces, wherein 1, 2 and 3 layers are tightly connected to each other; as magnetic elements neodymium magnets are used; by changing distance between magnetic elements it is possible to change length of keys stroke; with change of distance between magnetic elements it can be specified moment of closing to final point of button or in final point of button.

EFFECT: creation of a keyboard of a thin, reliable and durable structure with a wide range of adjustment of length of a stroke of a key till the moment of closing of contacts and protection of contacts from moisture, dust and increased wear.

3 cl, 2 dwg

Description

Technical field

The invention relates to the field of electrical engineering, in particular to switching equipment, and can be used in information input and conversion systems, as contact elements for keyboards and control devices.

State of the art

A technical solution is known - a magnetic switch related to the field of electrical engineering, in particular, to switching equipment, and can be used in input and conversion information systems, as contact elements for keyboards and control devices. The magnetic switch comprises a housing 1, a movable part 2, a magnetic element in the movable part 3, a movable magnetic element with a conductive element 4, a stationary magnetic element 5, contacts 6, softeners for the movable part 7, a softener for the movable magnet with the conductive contact 8, a partition wall that isolates the movable element from a magnetic element with a conductive element 9, a partition wall, which serves as the basis for contacts 10, an opening in the housing 11, a limiter for the movable part 12. Case 1 is made of insulating material. The movable part 2 can be made in the form of a button or key located in the opening of the housing 11. The movable part 2 has a limiter 12. The magnetic elements 3, 4 and 5 are located from each other at a distance of the magnetic repulsive forces acting as a return mechanism for the movable part and a magnetic element with a conductive contact, can be made of magnets based on permanent rare earth magnets. Softening pads 7 and 8 can be made of rubber, are used to reduce noise during operation of the device. By choosing the distance between the magnetic elements 3, 4 and 5 and the magnetization force of the magnetic elements, you can change the control range of the magnetic switch. (RU No. 176110).

A disadvantage of the known technical solution is the complex production and the need for further installation of each tactile element, which increases the complexity, cost and size of the final device. Another disadvantage of the known technical solution is the lack of tightness and, as a consequence, the lack of protection of the contacts from moisture and dust.

Other well-known technical solutions for a similar purpose with a similar set of essential features (a keyboard consisting of 4 layers with sealed layers of the contact group, where the contacts are isolated from water, dust and direct exposure to the button, the contact closure is carried out only under the influence of the magnetic field of the magnetic elements installed in the button) when conducting a search in scientific and technical literature and patent documentation, the applicant was not found. The applicant believes that the claimed magnetic keyboard meets the criterion of "novelty" and has an inventive step. The magnetic keyboard can be made on known equipment and used in various devices in input and conversion information systems, as contact elements for keyboards and control devices. Therefore, it meets the criterion of "industrial applicability".

Disclosure of invention

The technical problem solved by the invention is the creation of a keyboard of thin, reliable and durable design with a wide range of control of the stroke length of the key until the contacts are closed and the contacts are protected from moisture, dust and increased wear.

The technical result is achieved by the fact that the magnetic keyboard contains magnetic elements that act as a return mechanism for the button and at the same time participate in the contact group, for closing and opening contacts, acting only with a magnetic field, where the contact group is in a sealed chamber, protected from water and dust. Also, neodymium magnets with their high magnetization strength allow the use of very thin and small magnetic elements, which in turn can significantly reduce the thickness of each tactile element and the entire keyboard as a whole. By changing the size, the force of magnetization of the magnetic elements, you can change the force required to press the button.

By changing the distance between the magnetic elements, you can change the stroke length of the keys. By changing the distance between the magnetic elements, the moment of closure to the end point of the button or at the end point of the button can be set.

The main technical features and advantages of the proposed technical solution are described in the presented preferred embodiment. The scope of protection of the invention is not limited to the described example, but includes various embodiments in accordance with the general concept. In particular, by increasing / decreasing the number of buttons on the keyboard or using a different geometric shape of the magnetic elements instead of the disk-shaped shape of the magnetic elements and / or resizing, the magnetization force of the magnetic elements is just one of many possible design solutions of this invention.

The invention is illustrated by the drawing (Fig. 1), which shows an example of execution 1 of the tactile element of the magnetic keyboard in section and in accordance with the invention.

A magnetic keyboard is a collection of tactile elements made on a common dielectric basis. A separate tactile element comprises: a layer serving as the base of the keyboard 1, comprising a stationary magnetic element 5; a dielectric layer 2 containing open contacts 6; a dielectric layer 3 with a working chamber 9, comprising a movable magnetic element with a conductive coating 7; a dielectric layer (front panel) 4, containing a button 10, with a magnetic element 8. Magnetic elements 5, 7, 8 are located from each other at a distance of the magnetic repulsive forces, which play the role of a return mechanism for a moving part and a magnetic element with a conductive contact. By changing the size, the magnetization force of the magnetic elements, you can change the force required to press and changing the distance between the magnetic elements, you can change the stroke length of the keys and the moment of contact closure. By changing the distance between the magnetic elements, the moment of closure to the end point of the button or at the end point of the button can be set.

The device operates as follows. For clarity, the operation of a separate tactile element in a variant execution is described. In the initial state, the contacts are open, since under the influence of the magnetic forces of repulsion of the magnetic element 5, the closing magnetic element 7 is in the extreme upper position of the working chamber 9 and does not touch the contacts 6. When the button 10 is exposed, it moves down along with the magnetic element 8 and due to the action of magnetic repulsive forces, it exerts pressure on the magnetic element with a conductive coating 7, which, moving down, closes the contacts 6. After the termination of the action, the button 10 with the magnetic element 8 and magnetically the 7th element 7 due to the magnetic repulsive forces existing during the interaction of the same poles of the magnetic elements 5, 7 and 8 is returned to its original position and the contacts 6 are opened.

The presence of magnetic elements in the structure, facing each other with the same poles and located at a distance from the magnetic repulsive forces, creates a magnetic field that plays the role of a return mechanism for the button and opening the contacts. Insulating the magnetic element that closes the contact in a sealed housing from the button allows you to protect the contacts from excessive pressure, water, dust and, as a result, increase the service life of the contacts.

At the same time, tightness, reliability, durability, thinness and simplicity of the design are ensured, there is no need to manufacture labor-intensive return structural elements, a complex contact group and their installation, wear is reduced and damage to contacts is prevented by moisture, dust and excessive pressure.

Brief Description of the Drawings

The invention is illustrated by drawings, which do not cover and, moreover, do not limit the entire scope of the claims of this technical solution, but are only illustrative materials of a particular case of execution:

In FIG. 1 shows a separate tactile element in section;

In FIG. 2 shows the external general view (in projection) of the finished industrial sample of the product in a disassembled and assembled state - a 4-button magnetic keyboard.

Claims (3)

1. Magnetic keyboard, characterized in that it includes a housing consisting of 4 layers, 1 layer contains fixed magnetic elements, 2 layer consists of a layer with contact pads, 3 layer contains moving magnetic elements in the working chambers, coated with a conductive coating and facing the same poles to magnetic elements in 1 layer located at a distance of the magnetic repulsive forces from each other, 4 layer contains buttons with magnetic elements facing the same poles to magnetic elements in 3 layer, p positioned apart from each other at a distance of the magnetic repulsive forces, characterized in that 1, 2 and 3 layers are hermetically connected to each other; Neodymium magnets are used as magnetic elements; by changing the distance between the magnetic elements, you can change the stroke length of the keys; By changing the distance between the magnetic elements, the moment of closure to the end point of the button or at the end point of the button can be set. 2. The magnetic keyboard according to claim 1, characterized in that the layers 1, 2 and 3 are hermetically connected to each other, thereby protecting the working chamber with contacts 2 layers and contact magnetic elements 3 layers from dust and moisture. 3. The magnetic keyboard according to claim 1, characterized in that the contacts of the 2 layers are closed by a magnetic element coated with a conductive composition, only under the influence of the magnetic field of the magnetic elements in the buttons 4 of the layer facing each other with the same poles and located at a distance from each other repulsive magnetic forces.

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