DE8810751U1 - Foot switch for operating medical laboratory, office and other equipment - Google Patents

Description

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111/625

Steute-Switchgear Construction G. SÖlken, 4972 Löhne 3

Foot switches for operating medical, laboratory, office and other equipment

The invention relates to a foot switch for operating medical, laboratory, office and other devices, consisting of a switch base and a tiltably mounted on this base, which is fixed at its free part.

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Known foot switches of the aforementioned type are equipped with exposed contacts that are mechanically operated by the rocker switch and therefore do not meet the safety requirements for electrical switches intended for use in damp rooms. However, since devices that can be operated by foot switches are increasingly being used in such areas, the existing disadvantage is becoming more and more noticeable.

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For the reasons mentioned above, the object of the invention is to make available a foot switch suitable for damp areas, the construction of which fully corresponds to this protection class with the smallest possible dimensions.

To solve the problem, the claims specify a foot switch which is mainly characterized in that a switching element with contact tongues arranged in a protective gas filling, a so-called reed contact, is attached to the switch base and a switching magnet intended for actuating the reed contact is attached to the switch plate, whereby the reed contact accommodated in a recess in the switch base can preferably be embedded in a casting compound. As a result of these measures, exposed mechanically actuated contacts are avoided and low-wear switching processes are achieved. If the switch base and the switch plate are also made of break-proof plastic, total insulation is guaranteed.

In a further development of the invention, it is also proposed that a Hall element takes over the contact function instead of the reed contact. In this way, a bounce-free contact output required for the processor technology can also be achieved.

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111/625

An example of the implementation of the object of application is described below using the drawing.

The foot switch shown in vertical longitudinal section consists of the switch base 1 and a rocker switch 3 which is mounted on it so that it can tilt around the pivot point 2 and has transverse grooves on the top side. The edges of the rocker switch 3 overlap the switch base 1 on all sides and its free part is supported on the switch base 1 so that it can tilt by means of coil springs k . Both parts are made of break-proof plastic to create a completely insulated housing, which is also made non-slip by round rubber feet 5 provided on the corners of the switch base 1.

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In the switch base 1 there is a switching element embedded in a casting compound 8 and having contact tongues arranged in a protective gas filling, a so-called reed contact 9, the connecting cable 10 of which leaves the switch base 1 at the back. Above the reed contact 9, a switching magnet 11 is attached to the underside of the rocker switch 3, with which the low-wear reed contact 9 is actuated when the rocker switch 3 is depressed, limited by a stop cam 12, thus executing an electrical switching process.

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is solved.

The design features of the universally designed foot switch described meet all the requirements for using it in wet rooms and, as a result, for operating devices for which this type of protection is required. If a Hall element (not shown here) is inserted into the switch base 1 instead of the reed contact 9 , bounce-free contact outputs can also be achieved, as are often required in electronic circuits.

Claims (3)

111/625 Steute-Schaltgerätebau G. Sölken, 4972 Löhne 3 Foot switches for operating medical, laboratory, BOro and other devices Claims: 1. Foot switch for operating medical, laboratory, office and other equipment, consisting of a switch base and a rocker switch mounted on the base so that it can tilt and the free part of which is supported by springs, characterized in that a switching element with contact tongues arranged in a protective gas filling, a so-called reed contact (9), is attached to the switch base (1), and a switching magnet (11) intended for actuating the reed contact (9) is attached to the switching rocker (3). 2. Foot switch according to claim 1, characterized in tit» - 2 - 111/625 ** that the reed contact (9) housed in a recess (7) of the switch base (1) is embedded in a casting compound (8). 3. Foot switch according to claim 1 or 2, characterized in that both the switch base (1) and the rocker switch (3) are made of break-proof plastic. H. Foot switch according to one of the preceding claims, ] characterized in that instead of the reed contact ] tes (9) a Hall element in the switch base (1) , is inserted.