DE1976676U - ROTARY-SNAP SWITCH. - Google Patents

Description

Electro-mechanical works

Jakob Preh Nachf.

Baa Feustadt / Saale

Bad Neustadt / Saale, d. 10/23/1967

Kö / lCr

File 10/67 Gm

Rotary jump holder

The innovation concerns a rotary snap switch, in which a progressive Rotary step movement of the switch rotor triggered by the axial displacement of a central pressure piece and by one of this Displacement tensioned storage spring is effected. To form such a Switch has already been proposed, the jump piece of a jump mechanism known per se coaxially and non-rotatably with one of the movable contact pieces to connect the bearing flange. The jump piece consists of a cylindrical part with a surface line Outer ribs, to which the flange attachment serving as a contact carrier connects. The cylindrical part is in turn inserted into a hollow cylinder provided on the inside with adapted hats, which serves as a guide serves for the axial movement of the jump piece and pressure piece. The guide ribs are arranged in such a division and with such a division Inclination of their end faces provided that with each stroke of the pressure piece there is a rotation step of the jump piece of 45 and thereby each other diametrically opposite plague contacts dtirch in a square with an angular distance of 90 arranged contact rivets every second Rotary step are connected to each other. Such a print sequence switch accordingly fulfills the function of a single-pole switch.

The present innovation is based on the task of a rotary snap switch to design all functions with a very low overall height in compliance with VDE-compliant safety clearances with appropriate contacts normal installation switch, i.e. it can be used as an on and changeover switch as well as a group, series, changeover and cross switch.

According to the innovation, it is proposed that a rotary snap switch with a Switch rotor, whose progressive rotary step movement is triggered by the axial displacement of a central pressure piece and by a at this shift tensioned storage spring is effected, the switch rotor designed as a plastic spoked wheel with injected contact parts,

the spokes of which the inclined required to generate the turning step Have surfaces, and the fixed guide elements for the switch rotor and to design the pressure piece as ring sectors provided with helical surfaces on the front side, which enter the openings between the rotor spokes protrude.

Through this penetration of the contact carrier and the axial guide elements there is a considerable reduction in the overall height, since the interior of the switch is subject to the clear space caused by the rotor stroke can be made smaller and there is no dead space.

In an expedient embodiment of the inflation rate, it is proposed that the Rotor with four spokes, each arranged at an angle of 90, and that Switch housing with four protruding into the spaces between the spokes To provide ring sectors. This 4-fold arrangement of the rotationally symmetrical Guide elements inevitably result in a turning step of 90 for each Stroke of the pressure piece. By using plastics with good sliding properties it is possible to adjust the angle of inclination of the rotary step screw surfaces to keep smaller than 35, so that the switch stroke despite the relatively large turning step remains very small.

The large turning step results in relatively large distances between the open contacts, so that even with smaller overall dimensions of the Switch the YDE safety clearances can be maintained. In this The injection molding of the contact parts also has a very beneficial effect, since the contact bridges are completely isolated by injection molding and only to keep the small areas necessary for making contact blank are.

By suitably designing the contact bridges as diametrical or angular connectors and corresponding assignment of the fixed contacts can be found in the rotary step of 90 in that of the single pole installation switches known way to perform the switching functions of on and toggle (toggle) switches, group and series switches.

By equipping the hotor with two electrically separated one from the other opposite Koniaktbrücken and corresponding assignment of the fixed Contacts can be turned into two-pole on / off switches with a 90 ° turn and execute cross switch. The switch can be used as an independent construction

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element or in conjunction with other components, such as variable resistors or other control organs.

The innovation and its details are based on the drawing for various Example embodiments explained in more detail.

Fig. 1 is a schematic representation of a rotary snap switch when switched on.

Fig. 2 shows the same switch, but in the raised position of the Switch rotor.

Fig. 3 is a plan view and
4 shows a section of the switch rotor.

FIG. 5 with the partial figures I to IY is a diagram of the sequence of movements during a step of rotation of the switch rotor.

6 to 9 show schematically the arrangement of the fixed and rotor contacts for different types of switches.

The rotary snap switch according to FIGS. 1 and 2 has a plastic housing, consisting of the upper part (1) and the lower part (2) on which the angled fixed contacts (3), (4) are attached. In the middle of the lower housing part (2) four identical ring sectors (5) are arranged so that each sector lies in a quadrant of a circle concentric to the central axis of the switch. The central angle for each sector and the four identical guide openings (6) is 45 · Die Free ends of the sectors (5) are each bounded at the same height by helical surfaces (5 '), the pitch angle of which is approximately 30. In the cavity formed by the sectors and an adjoining circular opening in the bottom of the housing, the cylindrical pressure piece (7) provided with a central bore is inserted, which has four pins (7 ¹ ) that protrude into the guide openings (6) and are adapted to these it is easily displaceable but not rotatable in the axial direction. The guide ^{pins (7!} ) Are provided on the top with roof-shaped bevels (7 ¹¹ ) »also with an angle of inclination Krön approx. 30 °.

The switch rotor (8) is a wheel-like structure injection-molded from plastic represents, in which the hub (9) arranged by four at an angle of 90 ° Spokes (10) is connected to the rim part (11). The lower Boundary surfaces (10 ') have spokes that are trapezoidal in cross section a slope of about 30 to the wheel plane. The width of the spokes is dimensioned so that they fit into the guide openings (6) with little play.

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fit. In the rim part (11) there is an annular metallic contact bridge (12), in which the dome contacts (13, 14) are riveted diametrically opposite. Just lies in the area of contacts the otherwise completely encapsulated contact bridge is exposed.

The switch rotor (8) is inserted in the housing so that one side of the hub (9) protrudes into the bore of the pressure piece (7) and the spokes are in the openings (6). 1, the contacts (13), (14) on the contacts (3) 5 (4) are in the on state, as shown in Fig., On, wherein the contact pressure ^it is evidence ~ by the prestressed compression spring (15).

The switching process generated by the respective rotary step takes place as shown in the illustration in FIGS. 2 and 5 as follows. The diagrams I to IV of FIG. 5 schematically show four states of the movement process carried out in one plane. In state I, the spokes, one of which (10a) is marked with a double border to show its different positions, are located between the ring sectors (5) in the axially parallel guide openings (6). By applying axial pressure on the pressure piece (7) against the direction of pressure of the spring (15) and therefore increasing its tension at the same time, the switch rotor (8) is raised until the lower edge of the inclined spoke surface (10 ¹ ) is above the upper front edge of the screw surface (5 ¹ ) stands. This frees the rotor from the axial guidance of the guide openings (6) and, due to the component of the compressive force of the spring (15) acting in the tangential direction on its inclined spoke surfaces, experiences a rotary movement in the direction of the arrow (Fig. II) by about half a width of the pin (7 ·), corresponding to approx. 22.5, whereby the spoke surfaces (10 ¹ ) partially grip over the screw surfaces (5 ¹ ) (Fig. II). ¥ now ird of the shift-triggering pressure on the pressure piece (7) removed, then slide the spoke faces (ΙΟ ¹⁾ under the action of the spring (15) further to the screw surfaces (5 ¹⁾ from (figure III), whereby the rotor ( 8) undergoes an additional rotation, which is terminated after a total travel of 90 by reaching the next guide opening. The rotor is now pushed back again in the axial direction by the spring (15) until its contacts rest on the other mating contacts or, in the case of a switched-off position, the end face of the rotor rests on the housing base. Each time the pressure piece is pressed, such a rotary step is triggered, so that the rotor executes a progressive rotary movement in steps of 90 °.

In the pig. 6 is the contact configuration for a single pole switch namely shown in the "off" position. At the turning step of 90 the two plague contacts P and A are connected to one another by the bridge (12) while the switch is opened again in the next step.

The Pig. 7 shows the contact assembly of a single-pole changeover switch, at which alternately connects the contacts A and B to the contact P.

The Pig. S and 9 show switches in which the rotor is connected to two separate, opposing contact bridges (16,17) is fitted, which connect two plague contacts in the same quadrant with each other. The plague contacts are arranged so that the switch after Pig. 8 the puncture of a cross switch and the switch according to Pig. 9 Puncture of a two-pole changeover switch fulfilled.

Claims (4)

Protection claims 1.) Rotary snap-action switch with a switch rotor, the progressive rotary step movement of which is triggered by the axial displacement of a central pressure piece and is brought about by a storage spring tensioned during this displacement, characterized in that the switch rotor (8) is a plastic spoked wheel with injected contact parts (12) , (16), (17) is formed whose spokes (1O) have the inclined surfaces (ΙΟ ¹ ) required to generate the turning step and that the fixed guide elements for the switch rotor (8) and the pressure piece (7) through the face with screw surfaces (5 ¹ ) provided ring sectors (5) are formed, which protrude into the openings between the Botor spokes (1O). 2.) Rotary snap switch according to claim 1, characterized in that the scarf terrotor (8) has four spokes (10) arranged at an angle of 90 °. 3.) Rotary snap switch according to claim 1, characterized in that the Switch rotor (8) two electrically separated, opposite one another Has contact bridges (16), (17) which each serve to connect two fixed contacts located in the same quadrant. 4.) Rotary snap switch according to claim 1, characterized in that the Angle of inclination of the helical surfaces (5 ') for generating the turning step is less than 35 °.