DE1060960B - Electrical contact device - Google Patents

Description

GERMAN

The invention relates to an electrical contact device with a plate-shaped Contact operating organ, which extends from a through an opening of the organ, transversely to this Organ standing pin is guided, which supports one end of a spring acting on the organ and is provided with a stop cooperating with the organ, the organ opposite to a by movement of the organ to be actuated contact is held in a rest position by spring force.

In a known contact device of the type mentioned above, the contact operating member of a compression spring held on a collar created by enlarging the pin diameter, while the pen itself is held in the rest position by a separate spring. Located in this rest position the organ is placed at a good distance of two on both sides of the pin at practically the same height fixed contacts for which the contact operating element is in the displaced state of the pen represents an electrical interconnection. Such a contact device has the advantage that the Contact pressure caused exclusively by the force of the spring interacting with the operating element will.

The aim of the invention is to create a design which simplifies the known design means, which brings about a saving in manufacturing costs and also various new possibilities offers,

According to the invention, the spring holding the contact operating member in the rest position is the same as that Spring that holds the organ against the first stop connected to the pin, including the side of the Pin a second stop which already cooperates with the plate-shaped organ in its rest position is arranged, the mutual displacement of this second stop and the pin in whose longitudinal direction stops the plate-shaped organ and lets it tilt around the first stop on the pin, the tilting movement representing the contact operating movement of the organ and the space of the The pin in the opening of the plate-shaped organ is sufficiently large to accommodate the plate-shaped organ to perform this tilting movement.

It should be noted that the expression "contact operator" is interpreted in a very broad sense must be and is not limited to an organ that is itself current-carrying or an electrical Contact carries, as is the case with the known contact device described above. The contact operator can, for example, be coupled with a more or less extensive lever system that starts moving when the organ overturns Contact device

Applicant:

NV Philips' Gloeilampenfabrieken ₁ Eindhoven (The Netherlands)

Representative: Dipl.-Ing. H, Zoepke, patent attorney, Munich 5, Erhardtstr. 11

Claimed priority; Netherlands 28 June 1956

Nicolaas Scheffer, Hilversum (Netherlands), has been named as the inventor

is set and thereby carried by this system movable contact with fixed contacts in Brings contact, which in this interaction, the movement of the lever system and thus the contact operating member restrict.

The movement of the contact operating member is preferably carried out by several fixed contacts at the same time stopped, which are then arranged such that at least one is on each side of the plane that stands transversely to the plate-shaped organ and through the interacting with this organ already in the rest position Stop and the point of application of the spring passes through it.

In a favorable embodiment of the contact device according to the invention, the contact ■ put the contact operating member with the stop connected to the pin in such a position that the spring between this point and the point of interaction between the stop and the contact operating member attacks the latter. In this case, one designed as a fixed contact is preferably used second stop used, which in the rest position together with the first stop that of the spring moment exerted on the contact operating member in relation to the stop connected to the pin catches. In the latter case, there is a simple, play-free central position fixation of a movable organ, in addition, the two stops causing the central position of the organ as fixed parts of Normally closed contacts are effective.

909 560/332

The movable contacts can each be formed from pieces of wire bent into a ring, which by moving in their plane with different pairs of standing perpendicular to the plane of the rings and fixed contact wires arranged around these can interact. In this context it is noted that contact springs are known per se, which at one end with a a shift drum cooperating round bend are provided.

The invention is explained in more detail on the basis of the drawings showing four exemplary embodiments. It shows

Fig. 1 shows a cross section of a push button switch, Fig. 2 shows a cross section according to the line II-II Fig. 1,

3 shows the push button switch according to FIG. 1 in the depressed state,

4 shows a schematic side view of another embodiment of a push button switch,

5 shows the same push button switch in a transverse view along the line V-V of FIG. 4,

Fig. 6 shows an electromagnetic relay in side view and

FIG. 7 shows a cross section of this relay along the line VII-VII according to FIG. 6.

8 to 11 relate to an operating rod held free of play in the central position, with When this rod is moved from the central position, an electrical contact is opened after a certain stroke will.

8 shows schematically a view with the rod occupying the central position;

9 shows the moment when the contact is opened when moving from the central position;

Fig. 10 shows the rod with the contact fully open, and

Fig. 11 shows separately the plate-shaped contact operating member and a contact plate carried by this the device of FIGS. 8 and 9 inclusive.

1 to 3, a pin 1, preferably made of insulating material, is guided with the lower end in an opening 2 provided in an insulating lower frame plate 3 , while the upper end carries a cap 4 which is inserted in a corresponding opening 5 in a upper frame plate 6 is performed. Between the frame plates 3 and 6 , the pin 1 is provided with a widened edge 7 , onto which an annular contact operating member 10 is pressed by means of a compression spring 9 surrounding the pin and supported against a collar 8 of the pin.

Evenly divided at \ f a circle, three fixed contacts 12, 13 and 14 are attached next to the pin 1 by means of flange sockets 11 fixed in the plate 3. These contacts consist of metal strips whose end closest to the pin 1 cooperates or can cooperate with the contact operating element 10 , while the other end is used for connection to lead wires. The end of these fixed contacts which cooperates with the contact operating element 10 is bent over into a rectangular shape and extends parallel to the pin. The length of this bent piece 15 of the fixed contact 12 is greater than that of the corresponding pieces 16 and 17 of the contacts 13 and 14.

In the rest position shown in FIG. 1, the pin 1 assumes a position in which the contact operating element 10 rests flat against the edge 7 of the pin 1. These

The position is limited downwards from the end 15 of the contact 12 and upwards by the interaction between a collar 18 at the bottom of the cap 4 and the upper frame plate 6. When, as shown, the contact operating member 10 rests on the end 15 , there is a small space between the collar 18 and the frame plate 6 .

If the pin 1 is pressed down by pressure on the cap 4 , the ring 10 is held against on one side by the part 15 of the fixed contact 12 that acts as a stop, so that the ring around the part of the edge 7 furthest from the stop 15 knock over. Such a tilting movement is possible because the central opening 19 of the ring 10 is spacious enough. As soon as the ring 10 has reached the vertical ends 16 and 17 of the fixed contacts 13 and 14 as a result of this tilting movement, the ring 10 stops while the pin 1 continues to move until it finally hits the frame plate 3 with the edge 7. This state is shown in FIG. 3.

In the pressed-in state, in which the position of the ring 10 is clearly determined by the bearing on the ends 15, 16 and 17 of the three fixed contacts, the contact pressure is determined exclusively by the force of the spring 9 .

If the push button 4 is released, the spring 9 pushes the pin 1 upwards, the ring 10 remaining in the tilted position until it is reached by the edge 7 . The spring pushes the pin up even further, the ring 10 being tilted back until it rests flat against the edge 7 again, whereby the initial position shown in FIG. 1 is restored. The contact operating member 10 can consist entirely of metal; in this case it can electrically connect through all three fixed contacts 12, 13 and 14. The ring 10 can also consist of an insulating material and on the side of the edge 7 can be partially provided with a metal coating or metal strip which is only opposite the ends 16 and 17 of the contacts 13 and 14. Then only the contacts 13 and 14 are electrically connected through in the depressed position of the button. In order to prevent the ring 10 from rotating about the pin 1 in this case, the end 15 can be provided with a narrower extension piece which extends into a corresponding recess in the ring 10 with play.

The difference in height between the ends of the fixed contacts 15,16 and 17 due to the contact gap in the rest position and therefore must have according to the mode of operation of the contact device a minimum value.

The push button switch according to FIGS. 1 to 3 is only a normally open contact, while a push button switch is shown in FIGS. 4 and 5 which also has a normally closed contact, ie a contact which is opened by pressing the button. In the switch shown in FIGS. 4 and 5, the pushbutton consists of a flat metal strip 40 with a punched-out tongue 41, on the edge of which the likewise strip-shaped contact control element 42 rests by the pressure of a spring 43. The compression spring 43 is pretensioned between the member 42 and an insulating pressure cap 44 fixed on the upper end of the strip 40 . The pushbutton is guided, as in the case of the pushbutton described above, through openings in an upper and a lower insulating frame plate, which are designated in FIG. 4 by 45 and 46, respectively.

The strip 42 has an elongated opening 47 through which the pushbutton 40 extends and which is in the The direction transverse to the surface of the button 40 is sufficiently wide to allow a tilting movement of the strip 42 opposite the button 40 to enable.

On that side of the button 40 which faces away from the tongue 41 punched out of this button is A stop 48 for the contact operating strip 42 is arranged on the frame plate 46.

Fixed contacts 49 and 50 are arranged on the side of the tongue 41 on both sides of the contact operating member 42. These contacts, which lie in the longitudinal direction of the strip 40 at a certain distance from one another, each consist of two separate parts which are similar to the contacts 13 and 14 of the switch according to Fig. 1 to 3. These two parts are each on a different side of a plane which passes through the stop 48 and the point of application of the spring 43 on the contact control strip 42 and is transverse to the latter (i.e. the plane of the drawing in FIG. 4).

When the print key 40 is at rest, assumes a rest position a, in which the contact operating tab 42 abuts the stops 48 and 49, as shown in Fig. 4. If the pressure cap 44 is pressed down, the contact operating strip executes a tilting movement, this strip resting against the contact 50. If you then let go of the pressure cap again, the button and the contact operating element return to the rest position.

When the pressure cap 44 is pressed down, the connection between the two parts is thus initially established of the contact 49 and the operating member 42 interrupted and then with the two parts of the contact 50 made contact. When the contact operating member 42 is made entirely of electrically conductive Material, an electrical connection between the two parts of the Contact 49 and established between these and the stop 48. In the depressed position, the Contact operating member 42 a connection between the two parts of the contact 50 and also between these and the stop 48.

The contact operating member 42 may be made of insulating material, e.g. B. made of plastic, where the located between the contacts 49 and 50 end is energized, for. B. by adding a Metal cap is set, which in the rest position the two parts of the contact 49 and in the depressed The two parts of the contact 50 are connected through.

6 and 7 show an electromagnetic relay in which an L-shaped yoke 61 connected to a core 60 supports a rotatable armature 62 which can be attracted by the free end of the core surrounded by a coil 63.

With the longer leg of the yoke to this transverse pin 64 is connected, which of a compression spring 65 is surrounded. One end of this compression spring sits on the pin 64 screwed and thus adjustable nut 66 and with the other end on a plate-shaped Contact operating member 67, which is almost transverse to the pin 64 and has an opening 68, through that this pen is enough.

One end of the organ 67 is provided with a spherical cam 69 with which the in Direction of the longer leg of the yoke extending part of the armature 62 can cooperate.

A support block 70 is fixed on the yoke, which with a fork-shaped end 71 supports the organ 67

encompasses both sides and thus limits the movement of this organ transversely to the plane of the drawing. The support block 70 furthermore carries a spherical cam 72 which cooperates with the element 67 and which is on the other side of the pin 64 than the cam 69 lies.

The end of the contact operating member 67 which does not cooperate with the armature 62 is U-shaped bent, and each leg 73 of the U carries a system of leveling levers, which movable contacts 74 wear.

Each movable contact 74 consists of a wire bent into a ring, preferably with one Surface made of precious metal, which is supported pivotably by one end of a spindle 75. Every spindle 75 is pivotable by a coupling strip 77 held by spacer rings 76 in the center of the spindle supports. These coupling strips are each articulated to one end of a spindle 78, which in turn can be pivoted in the middle of one of the legs 73 of the contact operating member 67 is supported.

The fixed contacts which cooperate with the wire rings 74 and are connected in pairs consist of the ends 80 provided with precious metal of several standing transversely to the surface of these wire rings Wires 81. These wires are held in a plastic block 82 fixed on the yoke 61. The Wire rings 74 extending in the direction transverse to their face between an end face 74 of the plastic block 82 and a transparent plate 83 covering the contact space are included four fixed contacts 80 each assigned. In the rest position of the armature 62 and thus also the rest position of the contact operating member 67, each ring 74 connects two of these contacts through while in the tightened Position of the armature the other two are electrically connected.

In the rest position, when the armature 62 has little or no force on the contact operating element 67 exerts, the latter adjusts itself in such a way that that exerted by the spring 65 with respect to the cam 72 Moment of the then cooperating with the wire rings 74 upper pairs of these rings associated fixed contacts 80 is received.

Since the parts of the wire rings 74 with the member 67 connecting the balance lever system mutually are pivotable and the contact operating member 67 is supported punctiformly by the cam 72, lie in the rest position, all wire rings 74 on the upper pair of associated contacts 80. The one through the The contact pressure determined by the compressive force of the spring 65 is almost the same for all contact points.

If an electric current is sent through the coil 63, so that the armature 62 is attracted to the core is, then by the interaction between the armature and the cam 69 first the contact operating member 67 tilted around the cam 72 until all wire rings 74 are attached to the lower pair of assigned fixed contacts 80 have placed. Further movement of the armature becomes the contact operating element 67 lifted from cam 72. In this position, the contact pressure is also between the wire rings 74 and the fixed contacts 80 due to the compressive force of the spring 65. These The pressure force can be adjusted in a simple manner by adjusting the nut 66.

In FIGS. 8 to 11 , a central position fixing of an operating rod 90 which is movable in its longitudinal direction is explained. With this rod a not shown

Claims (7)

established organ, e.g. B. a control or regulating member of a machine or system moved. The rod 90, which is guided in a manner not shown in more detail, extends with some clearance through an opening 94 in an elongated contact operating element 91 which is more or less transverse to the rod and rests on a stop 92 connected to the rod and is subjected to the tensile force of a spring 93, one end of which is connected to the rod. The contact operating element carries a contact plate 95 which is movable with respect to it and which consists of a rigid metal strip which is bent over several times at a rectangular angle and which, with a narrower part 96, extends through a recess 97 in each end of the contact operating element 91. The length of the narrower parts 96 is greater than the thickness of the contact operating element 91, so that the contact plate 95 can enclose a small angle with the contact operating element 91. In addition to the operating rod 90, two stops 98 and 99 are fixedly arranged, each of which is located on a different side of the contact operating element 91, in such a way that they exert the moment exerted on the element 91 by the spring and the stop 92 connected to the rod can catch. When the operating rod 90 is left to its own devices, it assumes the play-free central position shown in FIG. In this rest position, the contact operating element 91 is set in such a way that the part of the contact plate 95 extending along the side of the contact operating element facing away from the stop 92 against the stop 98 and the end 100 of the contact plate lying on the other side of the contact operating element 90 against the stop 99 is pressed. In this position, the contact plate 95 represents an electrical through-connection of the two stops 98 and 99, which are designed as fixed contacts and are to be switched into a circuit. B. to the right as in FIG. 9, the contact operating element tilts about the stop 92. The contact plate 95 initially still retains its original position. Only when the contact operating element 91 has moved with one or the other end (this depends on the direction of movement of the rod 90) along the upper or lower narrower part of the contact plate (FIG. 9), the latter is carried along with continued tilting movement of the contact operating element and thereby lifted from the contact 99 (FIG. 10) or, with the opposite direction of movement of the rod 90, from the contact 98, so that the electrical connection between the two contacts is interrupted. The connection between these contacts is thus interrupted when the rod 90 is outside a certain distance from the central position, that is to say only after an initial displacement from this central position. 60 claims: 1. Electrical contact device with a plate-shaped contact operating member, which guided by a pin which extends through an opening in the organ and which is perpendicular to this organ is that supports one end of a spring acting on the organ and with a the organ cooperating stop is provided, which is opposite to a movement movement of the organ to be operated contact is held in a rest position by spring force, thereby characterized in that the organ (10, 42, 67, 91) holding the spring (9, 43, 65, 93) is the same as that which the organ against that connected with the pin (1, 40, 64, 90) first stop (7, 41, 72, 92) holds, including the side of the pin (1, 40, 64, 90) with the plate-shaped Organ (10, 42, 67, 91) already in its rest position cooperating second stop (15, 48, 62, 99) is arranged, the mutual displacement of this second stop and of the pin in the longitudinal direction of which stops the plate-shaped organ and around the first stop (7, 41, 72, 92) can tilt on the pin, this tilting movement being the contact operating movement of the organ and the space of the pin in the opening (19, 47, 68, 94) of the plate-shaped Organ is large enough to perform this tilting movement for the plate-shaped organ allow. 2. Electrical contact device according to claim 1, characterized by at least two from the second stop (15, 48, 62) different fixed contacts (16, 49, 80), which together one Determine the outermost position of the contact operating member (10, 42, 67), and in that of these Contacts at least one lies on each side of the plane that is transverse to the contact operator stands and through the second already cooperating with this organ in the rest position Stop (15, 48, 62) and the point of application of the spring (9, 43, 62) passes. 3. Electrical contact device according to claim 1 or 2, characterized in that the Spring (9, 43, 65, 93) between the contact points of the first that determine the tilting movement (7, 41, 72, 92) and the second (15, 48, 62, 99) stop with the contact determination member (10, 41, 67, 91) attacks on the latter, 4. Electrical contact device according to claim 3, characterized by one as a fixed Contact formed third stop (49, 80), which in the rest position together with the second Stop (48,62) that of the spring opposite the first stop connected to the pin (41, 72) absorbs the moment exerted on the contact operator. 5. Electrical contact device according to claim 4, characterized in that the contact operating member (67) is coupled to a compensating lever system (73, 78, 74, 75) which carries several movable contacts (74) which are shown in the rest position cooperate with fixed contacts (80), the fixed contacts Contacts together form the third stop mentioned, 6. Electrical contact device according to claim 5, characterized in that the movable Contacts (74) are each formed from pieces of wire bent into a ring, which are passed through Movement in their plane with different pairs from perpendicular to the plane of the rings standing and arranged around these fixed contact wires (81) can interact. 7. Electrical contact device according to claim 4, characterized in that the contact operating member (91) an electrically conductive contact plate with limited mobility in relation to this (95) carries a electrical through connection between the two fixed, second and rest position forms third stops (99 or 98) and when the contact operating member (91) is moved the rest position only after a restricted by the Movement of the plate (95) relative to the contact operating member (91) caused displacement of the latter taken and thereby by one of the mentioned attacks (99 or 98) is lifted. 1 sheet of drawings © 909 560/332 6.