DE3025514A1 - Pulse output direction indicator switch - has cams on shaft base wheel which flick central spring contact against either of two side contacts - Google Patents

Abstract

Mechanical electrical switch with a central sprung contact arm moving between two side contacts and a rest central position according to the direction of rotation of the central si witch shaft. The unit is a clock pulse type unit to output pulses by contact between the rotational direction. The central rotating shaft (6) has a base wheel (with the central spring (5) operate cams (7) around its circumference. According to the direction of rotation successive cams (7) bend the central spring contact (5) against either of the side contacts (3,4) so that it makes contact, a pulse is transmitted (5 to 3 or 5 to 4), and the central spring (5) slides over the cam (7) to restore to its rest central position. The central spring is a long item extending across the base of the switch below the rotating cam wheel on the end of the central shaft (6). The design simplifies output indication of switch rotation direction.

Description

"Electric rotary switchW

The invention relates to an electrical rotary switch with contacts, which can be brought into contact by turning the handle of the switch.

The object of the invention is to provide a mechanical detection of the direction of rotation of the switch and thus easy storage of impulses enable.

For example, switches are known for setting time switches, which generate electrical impulses depending on the speed of rotation.

The faster such a switch or. whose handle is turned, the higher the pulse frequency.

The detection of the direction of rotation is essential for the clear function of this switch an absolute prerequisite for the downstream electrical switching function.

It should åa, for example, set an electric clock forward or backward can be.

So far, it has been common practice to use so-called bit generators to use the direction of rotation to capture electronics.

This is done by first turning the direction of rotation through a electronic component is detected.

Depending on the direction of rotation, this component gives a corresponding output pulse on line A of B of a counter (electronic counter).

It is therefore independent of the system-immanent inertia of the device In addition to the mechanics and the counter, another component is required. In addition an additional short-circuit button is also required for the so-called step function, by means of which the detected pulses can be fed to a memory.

Furthermore, the mechanical part of these known devices very wear-resistant because a sliding contact runs over a printed circuit board there.

The abrasion between these parts is significant.

The invention now shows a way, such as by rotating the switch immediately a contact resp. Impulse on line A or 3 (depending on the direction of rotation) is given, i.e. counting up or down.

For this purpose, it suggests that two stationary contacts in the switch housing are arranged at a distance from each otherX that between these a bendable, resilient further contact is held and that the rotatable handle when turning this Temporary contact with one of the two stationary contacts, depending on the direction of rotation brings into contact.

The stationary contacts are intermittently with depending on the direction of rotation connected to the movable spring contact.

The impulse counting takes place simultaneously with the internal rotation detection due to the corresponding mechanical design of the switch.

In addition, there is no friction between the contacts.

It is advantageous that on the handle at least one with the elastic Contact corresponding driver is attached, the contact from the rest position deflects until contact with one of the two stationary contacts, wherein after reaching the contact position, the contact springs back into the rest position.

The driver leads the spring contact to one or the other stationary Contact.

There the spring contact is held by the stationary contact, temporary elastic bending of the spring contact during the entrainment away from the driver - slides over the spring contact.

The spring contact snaps back into the rest position and is released from the next driver detected again and so on.

It is preferably provided that the stationary contacts are two at a distance are fastened from each other in the housing pins, their terminal lugs or the like. outwards and their inner ends to the inner handle underside executed free leak, that also the elastic contact a free, relatively long bending arm forming transversely to the handle is held in the housing, wherein also its terminal lug is led out of the housing and its free contact-making End arranged between the free contact-making ends of the stationary contacts is that further the handle on its bottom a variety of regularly on having a common circle arranged drivers distributed radially far are attached outside on the underside.

The drivers can be rounded or beveled in the direction of rotation be to facilitate the function.

It is particularly advantageous that the drivers one in the direction of rotation Have a distance from each other that is slightly smaller than the distance between the stationary Contacts from each other is.

This ensures that the resilient contact when springing back does not accidentally hit the other stationary contact and thus a false impulse generated because namely the next driver in the direction of rotation as a stop for the resilient contact is used.

In combination it is provided that di * rproof contacts are V-shaped have free ends tapering towards one another towards the housing base, the distance between them on the bottom side less than or equal to the dimension of the elastic contact measured in the direction to the stationary contacts, and that the handle is axially displaceable towards the ground is formed, the elastic contact means of the handle like a pushbutton switch can be brought into physical contact with both stationary contacts, at the same time.

As a result, the Snordaung of an additional pushbutton switch is in accordance with The remarks made at the beginning are superfluous.

Preferably, it is intended that the elastic contact the axially forms effective return spring for the handle.

According to the invention is a pulse counter with an electrical rotary switch characterized in that each stationary contact with an input of an electrical Counter and the elastic contact connected to an external electrical lead is, so that the detection of the direction of rotation of the handle and the counting of the switching pulses takes place immediately.

It is also advantageous if the stationary contacts are short-circuited by means of the elastic contact by means of axial displacement of the handle a The determined pulse value is output to an electrical memory.

An embodiment of the invention is shown in the drawing and described in more detail below.

It shows: FIG. 1 the switch in the rest position in the same section in FIG. 2 cut rotated by 90 °; 3 shows the switch according to FIG. 1 in Xast function; Fig. 4 as seen in FIG. 2, FIG. 5, the switch seen from above, partially in section.

The electrical rotary switch consists of a housing 1 with a blown lid 2.

Within this housing 1, two stationary contacts 3, 4 are held, which are led out on the one hand from the housing 1 to the outside, so that an electrical Connection with the exposed terminal lugs can be made, and the other hand diverge in the interior of the housing from the bottom of the same to the cover 2 executed.

The contacts 3, 4 have a distance of somewhat less near the ground as conductor thickness.

With these corresponds to an elastic, flexible contact 5 of the free end is between the contacts 3, 4, in the rest position in a Middle position (Fig. 1) and deflected in the working position to the right, left or down.

The contact 5 runs across the entire housing width and is in Central area bent so that in the rest position the contact side end near the Housing cover and the outwardly guided end rests on the housing base.

To operate the contact 5, a handle 6 is centered in the cover 2 used, which consists of a disc provided with drivers 7 and a stub axle consists.

The handle 6, together with its disk, can be rotated (to the right and left) as well as towards the bottom of the case.

It is under constant stress from the spring action of the contact 5, which can be supported by a separate spring if necessary.

The driver disk of the handle has a circular shape, whereby their diameter is dimensioned so that it is smaller than the distance between the contacts 3.4 is from the center point of the disc, so that the contacts 3.4 with axial displacement the handle lie outside of the space penetrated by the drive plate.

In Fig. 3 and 4, the key function is shown.

The handle 6 is moved towards the bottom of the housing, so that the contact 5 connects the contacts 3 and 4 conductively.

If the handle 6 is released, the position according to FIG. 1 arises and 2 a.

If the handle 6 is rotated in this position, the contact is made 5 depending on the direction of rotation of the drivers 7 to the contact 3 or 4 moves.

When the contact position is reached, the respective driver slides 7 over contact 5, while the next driver is already being taken along again of contact 5 is aligned.

A pulse frequency is thus dependent on the speed of rotation transmitted and measured.

The state of currently neighboring drivers is slightly smaller than that Distance of the contacts 3, 4 in the switching plane according to FIGS. 1 and 2, so that a snap back of contact 5 until the other contact 3 or 4 is prevented, incorrect pulses are therefore excluded.

In the example, the disc of the handle 6 has twelve drivers 7, all new individual and combination features disclosed in the description and / or drawing are considered essential to the invention.

Claims (8)

Claims: Electrical rotary switch with contacts that go through Turning the handle of the switch can be brought into contact, characterized in that that in the switch housing (1) two stationary contacts (3,4) by far are arranged from each other that between these a bendable, resilient further contact (5) is held and that the rotatable handle (6) when rotating this contact (5) depending on the direction of rotation with one of the two stationary contacts (3,4) temporarily brings them into contact. 2. Electrical rotary switch according to claim 1, characterized in that that on the handle (6) at least one with the elastic contact (5) corresponding Driver (7) is attached, which controls the contact (5) from the rest position to the touch deflects with one of the two stationary contacts (4s3), after reaching the Contact position of the contact (5) springs back into the rest position. 3. Electrical rotary switch according to one of claims 1 or 2 characterized characterized in that the stationary contacts (3,4) are two at a distance from each other in the Housing (1) are fastened pins, their terminal lugs or the like. To the outside out and executed their inner ends to the inner handle underside leak that further the elastic contact (5) has a free, relatively long bending arm forming transversely to the handle (6) running in the housing (1) is held, with its terminal lug also led out of the housing (1) is, and its free contact-making end between the free contact-making Ends of the stationary contacts (3ei4) is arranged that further the handles (6) on their underside a multitude of regularly distributed on a common circle arranged drivers (7), which are attached radially far outward on the underside are. 4. Electrical rotary switch according to one of claims 1 to 3, thereby characterized in that the drivers (7) are spaced apart from one another in the direction of rotation have, which is slightly smaller than the distance between the stationary contacts (3ei4) from one another is. 5. Electrical rotary switch according to one of claims 1 to 5, characterized characterized in that the stationary contacts (3, 4) are V-shaped towards the housing base have free ends that run towards one another, their distance on the bottom less than or equal to the dimension of the elastic contact (5) measured in the direction of the stationary contacts (3,4), and that the handle (6) is axially displaceable towards the floor is formed, the elastic contact (5) by means of the handle (6) like a pushbutton switch can be brought into physical contact with both stationary contacts (3, 4), namely simultaneously. 6. Electrical rotary switch according to one of claims 1 to 5, characterized characterized in that the elastic contact (5) is the axially effective return spring forms for the handle (6). 7. Pulse counter with an electrical rotary switch according to claim 1 to 6, characterized in that each stationary contact (3, 4) has an input an electrical counter and the elastic contact (5) with an external electrical Supply line is connected, so that the detection of the direction of rotation of the handle (6) by counting the switching pulses. 8. pulse counter according to claim 7, characterized in that by Short-circuit the stationary contacts (3, 4) by means of the elastic contact (5) by means of axial displacement of the handle (6), the determined pulse value is output to an electrical storage.