A LEVER UNIT OPERATOR OF THE SWITCH FOR SWITCHES
The invention relates to a toggle switch operating unit for switches, in accordance with the preamble of claim 1. The invention relates in particular to a switch operating lever unit that is adapted to be mounted within a low-power switch. voltage. A lever connection is known from EP 0 560 697 Bl, in which a diametrically extending depression passes through the circular-cylindrical body of the operating lever of the. switch . Apart from an S-shaped contact lever, a voltage device acting on the previous one and equipped with springs is also included in the depression. The operating lever unit of the switch of this design is supported rotatably in the housing of a power switch, by means of the circumferential cylindrical area of the body of the operating lever of the switch. From the additional publication EP 0 314 540 Bl, a switch operating lever unit having a similar design is known, its substantial differential of the operating lever unit of the switch according to EP 0 560 697 Bl, consisting of the specific design of the tension device. It is the object of the invention to provide a switch operating lever unit that has a longer life and is less susceptible to the shocks that occur in the interruption space that are caused by the short circuits. This objective is achieved by combining the features defined in the independent claims. Further convenient developments of the invention can be taken from the secondary claims. One possibility to achieve the aforementioned objective in accordance with the invention is to provide a switch operating lever unit in which covers are accommodated to cover and mount the switch operator lever body in a lateral manner. the opposite sides of the body of the operating lever of the switch In this design, the supporting friction caused by the function of the operating lever unit of the switch is restricted to particular sections to which it is relatively difficult to attack with the caused discharges by short circuits in the contact space, due to its special position in the body of the operating lever of the switch When the operating lever unit of the switch is designed, a tension device that is arranged substantially on opposite sides of the body of the switch The operating lever of the switch and covered by the covers ", can act on the lever" c In this way, the tension device is housed in an area that is protected by the caps outside the depression of the body of the operating lever of the switch, which receives the contact lever and is exposed to the impact of the discharges that cause short circuits. With this configuration, the moving parts of the tension device remain substantially protected so that the function of the operating lever unit of the switch is hardly impaired by operational influences. According to a further development of the switch operating lever unit, the covers are positively connected to the opposite sides of the switch operating lever body by means of two sections that are formed diametrically opposite one with respect to the other. This design ensures a fast and safe assembly of the covers. These sections may be, for example, projections that are formed on the inner part of the caps and that are adapted to mesh with the slots provided on opposite sides of the body of the operating lever of the switch. It is useful in this context to form one of the slots as a through-hole that is provided in the body of the operating lever of the switch, which can be used at the same time to receive a pin to operate the operating lever unit of the switch. In this manner, plural operating switch lever units which are configured in parallel with each other can be operated by a single rod-shaped pin which passes through the body of the operating lever of the switch. In the operating lever unit of the switch according to the invention, the tension device consisting substantially of two springs is preferably housed in two grooves similar to ducts extending diametrically and in parallel with each other at the same time. sides of the body of the operating lever of the switch. At the same time, these slots form gear portions for the projections that are appropriately provided on the inner part of the caps. The alignment of the grooves must preferably be selected so that the direction of the extension of each groove covers an angle that fluctuates from 20 ° to 70 °, forming the line that connects with the portions that engage diametrically opposite in the body of the operating lever of the switch. In another alternative embodiment of the operating lever unit of the switch, the sections provided to produce a positive connection between the body of the operating lever of the switch and the cover, comprise projections that are they form on opposite sides of the body of the operating lever of the switch and which are adapted to mesh with the depressions that are incorporated in the disc-shaped covers. These depressions are preferably designed as U-shaped cuts in the disc-shaped covers, wherein the rib-like projections which are adapted to mesh with the similar grooves "to corresponding slots in the body of the operating lever of the switch, they extend from the lower sections of the U-shaped cuts. In the case of this alternative design of the operating lever unit of the switch, each cover preferably has two transverse grooves in its internal parts facing the respective side of the switch. body of the operating lever of the switch so that, regardless of the mounting side of the cover, any of these slots is always aligned, overlapping the slot in the form of conduit in the body of the operating lever of the switch. of the operating lever unit of the switch, each cover includes preferably on its external side, a support journal for supporting the body of the operating lever of the switch, the support journal having a diameter substantially smaller than the diameter of the body of the operating lever of the switch, which has a cylindrical design by itself. By the same, the risk of damaging the support position of the operating lever unit of the switch is greatly eliminated by the discharges that cause the short circuits in the contact space of the switch, and simultaneously the friction in the support position is minimized . An alternative combined solution of the objective, according to the invention, can also be achieved by means of a lever operating unit of the switch in which the tension device is configured in the external part of the space receiving the contact lever inside the body of the switch. the operating lever of the switch or that is covered in the body of the operating lever of the switch. The configuration covered by the tension device can be achieved, in turn, in a particular case by removable covers in the operating lever body of the switch. In the following, the invention will be explained in detail by way of two embodiments with reference to the drawings, in which: Figure 1 shows a partial section view of a housing of an arc extinguishing device of a low voltage switch, in which the operating lever unit of the switch according to the invention is mounted; Figure 2 shows the operating lever unit of the switch shown in Figure 1, in the off state of the switch; Figure 3 is a partially perspective schematic view of a first embodiment of the switch lever unit in accordance with the invention; Figure 3b is a representation of the operating lever unit of the switch in Figure 3a in a partially assembled state; Figure 4a shows a partially schematic perspective view of a second embodiment of the switch operating lever unit, in accordance. with the invention; Figure 4b is a representation of the operating lever unit of the switch in Figure 4a, in a partially assembled state. A low voltage switch that is not illustrated in detail in Figure 1 includes an arc extinguishing element consisting of a housing 11, a switch operating lever unit 9 that fits into a housing, arc chambers, conductors current carriers 16 and additional members that improve arc extinction. The housing 11 of the arc extinguishing element is mounted in a housing of the low voltage switch that is not shown in detail. The operating lever unit of the switch 9 serves to make an electrical connection between the two current carrying conductors 16. The operating lever unit of the switch 9 substantially consists of a body of the operating lever of the cylindrical switch 2, on which it rests a S-shaped contact lever 3 is rotatably mounted by means of a support shaft 5 which is mounted on this body. The operating lever unit of the entire switch 9 is rotatably supported on a receiving portion, not shown, of the housing 11, wherein the special type of this support will be explained in detail within the scope of the following design representation. of construction of the switch operating lever unit. The operating lever unit of the switch 9 can be operated by means of a link 10 to obtain the on state shown in Figure 1, or the switched off state of the switch shown in Figure 2. As can be seen in detail from Figure 3a, the operating lever unit of the switch 9 consists of a body of the operating lever of the switch 2, which has a rotationally symmetrical design, approximately cylindrical. The axis of the cylindrical body of the operating lever of the switch 2 coincides with the axis of the support axis 5 in which the lever 3 is supported in a movable manner. The contact lever 3 is received in a depression 2e extending perpendicularly to the axis of the body of the operating lever of the switch 2, passing diametrically through the body of the operating lever of the switch 2. The slots 2c that extend diametrically and in parallel with one another and which are in the form of conduits, are provided on the two faces of the cylindrical body of the operating lever of the switch 2. At the ends of the grooves in the form of conduits 2c, the U-shaped grooves 2d provided to receive the pegs 6 in the wall between the central depression 2e and the lower portion of the respective groove 2c. A roller 6a, which is slidably received in the depression 2e, is rotatably supported approximately centrally on each pin 6. In the grooves in the form of ducts 2c, the springs 7 are received, which are hung on the two sides at the ends of the tension pins on each face of the body of the operating lever of the switch 2. The length of the slits 2d is measured, they are compared with the width of the central support portion of the contact lever in S 3, so that, regardless of the state of operation of the switch, the pins 6 can not be contracted in any way towards the top of the lower parts of the U-shaped grooves 2d. A twisting of the body of the operating lever of the switch 2 results in the fact that the rollers 6a of the pins 6 are unwound on the adjacent apices respectively of the contact lever in the form of S 3 andin doing so, they are separated by force in the grooves 2d opposite the force of the spring 7 which contracts the tension pins 6, so as to exert by the same a permanent tension force in a counter-clockwise direction on the contact lever 3. In addition, the body of the operating lever of the switch 2 has a reception hole 2b in which a rod-shaped pin 1 is received. On both sides of the body of the operating lever of the switch 2, they incorporate diametrically the U-shaped depressions 2a, opposite the receiving orifice 2b. The covers 8 are provided on the two sides of the cylindrical body of the operating lever of the switch 2. Each cover 8 includes a cylindrical circumferential collar portion 8e and is provided in its internal part with a pair of reinforcing ribs 8c extending from approximately diametral manner, as well as a portion of U-shaped rib 8a that is formed independently of the previous one. The reinforcing ribs also serve to increase the distances of longitudinal movement and the air intervals in the arc extinguishing element of the switch. The grooves 8i which extend diametrically in the inner part of the cover 8, are formed between the reinforcing ribs 8c of each cover 8. The covers can be placed during their assembly in the body of the operating lever of the switch 2, so that each of the slots 8i is located level with the slits 2d of the body of the operating lever of the switch 2 and receives the ends of the pins 6 as a support. The slots 8i which are effective in that configuration as an axial restriction for the spikes 6, thus serve as guides for the spikes 6 during their operational displacement in the slits 2d, so that the spikes can be effectively prevented. they possibly get stuck in the 2d slits. When the respective lid 8 is configured on the corresponding face of the body of the operating lever of the switch 2, the sections 8c and 8a are brought into a positive connection with the groove in the form of conduit 2c and the depression similar to U 2a which is formed on the edge of the body of the operating lever of the switch 2. In addition, the lid 8 has an opening that is formed by a cylindrical portion 8b extending in the inner part of the lid. The cylindrical portion 8b is diametrically opposite to the U-shaped rib portion 8a which protrudes and has an outer diameter corresponding approximately to the internal diameter of the receiving hole 2b which is formed in the body of the operating lever of the switch 2. line connecting the center of the cylindrical portion 8b with the center of the U-shaped rib portion 8a includes, with the diametrical line that is brought hypothetically between the ribs 8c, the same angle as the angle between the line that connects the depression 2a to the receiving hole 2b and the center line of the duct-like groove 2c. This angle fluctuates mainly from 20 ° to 70 °, preferably it is approximately 65 °. On the outside of one of the caps 8, a pin-shaped stump 8d is provided on the side that is diametrically opposite the opening of the cylindrical portion 8b, ie, behind the U-shaped rib portion 8a . The stump 8d serves as a mounting protection, so that the body of the operating lever of the switch 2 can be mounted correctly within the opening 11 of the switch that is not shown in detail. Each cover 8 is provided on its outside with a support journal 8f which serves to axially support the operating lever unit of the switch 9 in the receiving portion that is not shown, of the housing of the switch 11. On the front face external of each cap, two diametrically opposed openings 8g are formed which serve to relieve the pressure of the body of the operating lever of the switch 2. One of the covers 8 includes, in its collar portion 8e, a protruding section 8h which simultaneously serves to mark the correct mounting position of the cover and the circumferential cover of the slits 2d, as well as the rollers 6a in the body of the operating lever of the switch 2 When the operating lever unit of the switch 9 is being mounted, the contact lever 3 is first adjusted within the depression 2e of the body of the operating lever of the switch 2, so that the pin 5 which serves as a connecting shaft from outside through the body of the operating lever of the switch 2 and a contact hole of the contact lever 3, which is not shown in detail. Then, the pins 6 are inserted into the slits 2d and the spring 7 is hung on the two sides of the operator body of the switch 2 at the ends of the pins by means of slightly extending the spring. Subsequently, the two caps 8 are first compressed on the two faces of the body of the operating lever of the switch 2, until the U-shaped rib portion 8a, which is provided in the inner parts of the caps, the ribs 8c and the cylindrical portion 8b, fit appropriately within the U-shaped depression 2a, the conduit-like groove 2c and the receiving orifice 2b. The lids 8 are preferably made of synthetic material so that the raised portions 8a, 8c and 8b can be inserted on the two sides of the body of the operating lever of the switch 2 with a light pressing force and therefore are not required. additional elements to tighten these covers to the body of the operating lever of the switch. Then, the operating lever unit of the switch 9 that is assembled in this manner is accommodated in the housing 11 of the arc extinguishing element in a receiving portion, which is not shown in detail in the Figure
I, so that support pins 8f extending axially on both sides of the operating lever unit of the switch can be received with sliding support portions of the receiving portion in the corresponding contours. Then, the joint 10 shown in Figure 1 is accommodated in an external part of the housing
II, so that the rod-shaped pin 1 can be inserted into a small eye formed at the lower end of the joint 10 and an opening of one of the cylindrical portions 8b of the covers 8, which is aligned with the ojillo Figures 4a and 4b illustrate a further embodiment of the operating lever unit of the switch 9, in accordance with the invention. This embodiment of the switch operating lever unit differs substantially from the first embodiment illustrated in Figures 3a and 3b, by the different design of the body faces of the switch operating lever and the covers. The operating lever body of the switch 22 shown in Figures 4a and 4b includes a depression 22e extending perpendicular to the body axis of the operating lever of the switch in which the contact lever 23, comprising the contact members 24, is received and supported on a tang 25. In the same manner as in the first embodiment, the cylindrical portions 26a extended from the pins 26 are brought into contact with the apex areas of the contact lever in the form of S 23, as indicated in the representation of Figure 1, in order to exert an elastic pressing force on the contact lever in its closed position, when the operating lever body of the switch 22 is rotated in the direction contrary to the hands of the clock. This mechanism was already explained in connection with the first modality. Two approximately rectanguide projections 22a, 22b diametrically opposed to each other are formed on each side of the body of the operating lever of the switch 22. The projections 22b that are formed on the two faces of the body of the operating lever of the switch 22 form the taps of a hole portion that is provided in the body of the operating lever of the switch 22 to receive a rod-like pin 21, while in the projections 22a that are diametrically opposed to it, the openings 22g are simply formed. A duct-like groove 22c extending diametrically between the projections 22a and 22b is provided to receive the spring 27. On the body sides of the switch operating lever 22, slit-like grooves 22f are formed along of the opposite sides of the projections 22a, 22b. On both sides of the body of the operating lever of the switch 22 plate-shaped covers 28 are provided which are made of flat material. These caps have a substantially flat disc shape that includes diametrically opposed cuts 28a, 28b, which are suitable when the caps are placed to receive the projections 22a, 22b that are formed on the faces of the body of the operating lever of the switch 22. In its lower area, the U-shaped cuts 28a, 28b include the portions 28c that are bent towards the mounting side of the cuts 28a, 28b, are adapted to be inserted into the grooves in the form of slits 22f for tightening the lids to the body faces of the operating lever of the switch 22 and, at the same time, they serve to increase the longitudinal movement distances and the air intervals in the switch. In each inner surface of the caps 28, each of which faces one of the fronts of the body of the operating lever of the switch 22, an X-shaped groove 28e is further formed which adapts, independently of the front in which the lid is to be accommodated to receive a portion of the spring 27 projecting outwardly from the front of the operating lever body of the switch 22. This design of the slot 28e allows an exchange of the covers 28 to be accommodate on both sides of the body of the operating lever of switch 22. As can be seen from the representation in Figure 4b, the diameter of the plate-shaped covers 28 corresponds to the diameter of the cylindrical body of the operating lever of the switch 22, so that, in the assembled state, the edges of the covers 28 align level with the cylindrical circumferential area of the body of the operating lever of the switch 22. On the outside of each of the covers 28, there is provided a support journal 28f by means of which the switch operating lever unit can be rotatably supported, in a portion Supported design of the housing 11, which is not shown in detail in Figure 1. The design of the operating lever unit of the switch illustrated in detail above, at the same time ensures a support operating lever unit of the switch that has a simple construction in the switch housing and a reliable protection of the moving parts in the body of the operating lever of the interrupt or against electric shock, in case of sparks. In addition, the longitudinal movement distances and the air intervals from the contact lever 3, the springs 7 and the pins 6 to the rod-like pin 1 are increased which, in the case of a single-pole switch, connects a transmission that is not represented in detail with the operating lever unit of the switch and, in the case of multi-pole switches, connects this transmission with the operating lever-1 switch units and interconnects the operating lever units of the switch. The covers are designed in such a way that they • ensure a reliable connection with the body of the switch operating lever unit. In this way, access to the gases occurring in case of short circuits to the moving parts of the switch and to the operating lever unit of the switch is prevented and an increased shield is secured against an adjacent switch unit. Failure to mount the caps is impossible, because the latter can be clearly discerned from the outside and, therefore, can be assigned to a particular side of the body of the switch operating lever or have an identical shape but, in that case, it can be accommodated in any front part of the body of the operating lever of the switch. In the case of a mode of the switch unit according to the invention which is not shown in detail, detachable lids can be dispensed with to simplify the manufacture by means of housing the tension device outside the area of the depressions 2e, 22e that receive the contact lever, but that are still protected in the internal part of the body of the operating lever of the switch.