Switch with fuse.

The invention relates to a manually operated circuit breaker with the features listed in the preamble of claim 1. Such circuit breakers are in blocks lined up in particular for domestic fuses Low voltage used.

Such, for example, from DE-OS 29 34 149 or DE-OS 26 18 360 known switches have at the top of its housing to a valve-shaped shift rocker, with a captive in the housing switch is manually operated. In closed position of the switch while the shaft for the fusible link of the rocker arm is covered. Thus, the shift rocker must be brought only in the open position for the backup exchange, the supply-side contact of the fusible link is disconnected from the mains. At the same time, a locking mechanism is actuated with fusible non- or incorrectly inserted, blocks the rocker arm in its open position. This guarantees the user a high degree of protection against contact.

The invention is based on the experience that in practice by a violent actuation of the shift rocker whose lock can be destroyed. This leads either to the inoperability of the switch or worse if a closure of the circuit breaker, thereby set despite missing or not before scriptural used fuse use of supply-side foot contact of the fuse base under power. Specifically, when an electrical load is secure repeatedly by blocks adjacent fuse switches, parts of the consumer on the parallel lying, equipped with a fusible link properly installed fuse switches can be energized, although in the circuit of the consumer obviously is an error.

The invention is based on the object, a backup switch of the type described above so that the lock of the safety switch is effectively protected from destruction by violent manual operation of the shift rocker.

This is ensured by an embodiment of a manually operated fuse switch according to the characterizing feature of claim 1.

Advantageous developments and structural features of the invention are described in the further claims.

The inventive knee in actuating the shift rocker is achieved that this is not rigid in itself. In entnommenem fuse link and thus blocked shift rocker bends system if the operation of the switch, the knee joint from the extended position against the spring load in its bent position. Thus, the latching is not the full operating force - which is in conventional fuse switches still multiplied by the leverage ratios - applied, but only to a dependent of the spring load fraction thereof.

By characterizing features of claims 2-4 a constructionally particularly meaningful solution of the problem is described. The knee joint is loaded by a coaxially arranged with its axis of rotation torsion spring in the direction of stretching. This torsion spring can be integrated virtually into the joint, resulting in a particularly compact and space-saving design. The special selection of the spring constant trouble-free functioning of the safety switch according to the invention is ensured. Since the transferable forces are greater than those to be overcome Einschaltkräfte, secure closing of the switch with fusible link properly inserted at any time. When blocked shift rocker only a fraction of the operating force is transmitted by the spring on the catch. By designing the spring, this force is so small that there is no danger of destruction for the interlocking components of the switch. Moreover, the shift rocker behaves when correctly inserted fuse link as with conventional backup switches. For untrained staff thus found no changes in the operation. The special safety advantageous behavior of the fuse switch of the invention occurs to light only in case of faulty operation.

Since the knee joint in accordance with the characterizing feature of claim 5 is arranged in the inner region of the actuating arm near the pivot point of the shift rocker, an actuation of the switch can only take place via the kink-secure outer leg of the actuator arm. Since the inner leg is very short, it has namely no attack surface for actuating the switch. Moreover lie by the arrangement of the knee joint in the vicinity of the pivot point with respect to the Verrastungsstelle approximately equal-He belverhältnisse ago. This facilitates the selection of the torsion spring, since the spring constant must be chosen only so that the maximum transmittable force is smaller than the breaking force for the locking position. Complicated calculations for due to different lever ratios can be omitted.

By characterizing features of claims 6-8, the knee joint is particularly well protected from outside access and improper manipulation. Since the torsion spring does not project over the Umrißfläche the shift rocker, whose pointed ends can cause injury when operating personnel.

By kink device-side as marked feature of claim 9 behind the knee abutment surfaces into mutual contact between inner and outer thighs together overstretching the knee is effectively avoided when operating the shift rocker in the opening direction. Especially by the angular design of the contact surfaces according to claim 10, a stable structure of the knee joint is achieved. Since the abutment surfaces substantially lie inside one another form-fitting, the pressure acting on it surface pressure is distributed evenly. This feature is further supported by the characterizing feature of claim 11, characterized as a great deal "meat" is created for the knee joint and the two stop faces the plant. Thus, the invention a circuit breaker is proposed, which is protected in the sum of its advantages very reliably and largely from damage.

Benefits has the secure switch, when a plurality of its kind as described in the claims 12 to 14, are combined in a switch block. If only one of a fusible link is not or incorrectly inserted, all backup switches are blocked by the attached in this a safety switch lock and the rigid connection of the drive arms. Since all the operating arms of the shift rockers are secured by a knee joint, it is not possible to destroy the latching and set the fuse block the downstream consumers completely or partially under power. This brings a significant safety advantage over the switch blocks according to the prior art with them. A particularly advantageous, since simple construction for the shift rockers is described in claims 13 and 14th The whole block is virtually operated by a single rocker arm, which is backed by a knee joint.

The invention is illustrated with reference to an embodiment shown in FIGS. Show it:<ul><li>FIG. 1 is a plan view of an open case half of the fuse switch using fuse correctly inserted and in power-position befindlichem load switch,</li><li>FIG. 2 is a plan view corresponding to FIG. 1, at entnommenem fusible and in off position befindlicher rocker switch and load switch</li><li>Fig. 3 is a plan view corresponding to Fig. 1 and 2, wherein entnommenem fusible link with an indicated actuation of the switching rocker despite blocking.</li></ul>

The designated overall by 1 circuit breaker is composed of two housing halves consisting of insulating material 2, of which only one is shown in the figures. The parting line between the housing halves 2 runs in the plane of the figures. The two housing halves 2 are riveted together in the final state. The rivets rich while the through holes 3 therethrough. The safety switch 1 includes a slot 4 for receiving the fuse insert 5. For current terminal of fuse insert 5 serve the terminals 6,7. The terminal 7 is connected via the supply line 10 electrically connected to the threaded spectacle 8, in which the integral with the retainer cap 9 screw 11 is screwed with its thread.

The fusible link 5 is provided at its top and at its bottom end with a respective end contact, namely the head contact cap 12 and the Fußkontaktkappe. 13 When properly screwed screw cap 11 is a conductive contact between the screw cap 11 and the head contact cap 12 of the fuse insert 5. The base contact 13 of the fuse insert 5 is located on a movably arranged in the plane of the figures within the housing mating contact 14 on. The mating contact 14 leads laterally from the region of the shaft 4 addition to a contact bridge 15 a operated by the shift rocker 16 load switch. The contact bridge 15 is the load switch (Fig. 1) with their two contact ends 17,18 to the mating contact ends 19,20 of mating contact 14 of the fuse insert 5 or connected to the terminal 6 contact lug 21 on.

The contact bridge 15 is controlled by the pressure of the closing springs strike toward the mating contact ends 19,20 respectively in the direction of the switch-beauf 22.23. The closing springs 22,23 are supported by its lower end to the housing wall 24th

On the upper side of the contact bridge 15 is made of insulating material, an existing plunger 25 with its front end. The plunger 25 is longitudinally displaceably supported in the pressure direction of the closing springs 22,23 and perpendicular to the longitudinal extension of the contact bridge between the housing walls 27 of the fuse switch within the first Through its support on the contact bridge 15, he is one in the space between the electrically conductive connected by the contact bridge 15 to one another in use position against contact ends 19,20.

The rocker 16 is mounted around the vertically extending to the plane of the rotational axis 28 pivotally mounted on circuit breaker. 1 It is at its the plunger 25 facing the end 29 with a recess 30 for receiving the switching rocker side arm - hereinafter referred to as shift rockers handlebar 31 - provided a 32 formed of the shift rockers arm 31 and the other arm, generally designated 33 toggle. The free end of the shift rockers arm 31 is pivotably mounted about the rotational axis 28 of the shift rocker sixteenth The handlebars 32 serves as a pressure transmission element and lies with its free end 34 facing away from the contact bridge 15 back of the push rod 25 at. The free end 34 of the arm 32 rests in this case one arranged on the back of the push rod 25 notch 35 such that it 35 in the drawing plane of the figures is pivotable through a certain angular amount around the crotch of the notch. By subjecting the contact bridge 15 and the push rod 25 by the closing springs 22,23 of the connecting rods 32 lies with its free end 34 permanently into the notch 35th

In the conversion of the shift rocker 16 from the power-on position (Fig. 1) in the OFF position (Fig. 2) of the toggle lever 33 is by conditioning the lower end of the recess 30 of the rocker arm 16 with its extended position (not shown) pushed through. The hinge axis 37 of the toggle lever 33 travels downward in the direction of the contact bridge 15 via the connecting rods 32 while the push rod (direction of arrow 26) and the contact bridge 25 is pushed down 15 is lifted off the mating contact ends 19,20 (FIG. 2).

A brief commentary on structure and function, the locking device for the shift rocker 16 will be described. It comprises a substantially extending in the direction of the arrow 26 locking bracket 37 which is fastened with its contact end 38 at the counter contact 14 in the contact bridge side edge region of the shaft. 4 The free end 39 of the locking bracket 37 is located in the peripheral region of the end 29 of the rocker arm 16. In turn-off position of the switching rocker 16, the recess is 30 this free end 39 of the locking bracket opposite. The mating contact 14 of the fuse insert 5 is acted upon from its underside by the contact spring 40 which is supported by its foot on the housing wall 24th In off-position (Fig. 2) of the switching rocker 16, the recess 30 is the free end 39 of the locking bracket 37 opposite. Now, when the fuse insert 5 taken, is by the application of counter contact 14 by the contact spring 40 of these raised and the free end 39 of the locking bracket displaced into the recess 30th Pressing the shift rocker 16 in the switching-41, the free end 39 of the locking bracket 37 comes into contact with the edge 42 of the recess 30, whereby the rocker arm 16 is blocked. This situation is shown in Fig. 3.

From this figure will be explained in the following, the structure and the function of the rocker arm 16: The shift rocker i6 is lever-like construction and mounted pivotably about the axis of rotation 28 of the fuse switch. 1 It is substantially L-shaped, the horizontal L-leg 43 merges at its free end in a concentrically around the axis of rotation 28 arranged cylindrical roller 44th This cylindrical roller 44 has in its contact-side peripheral portion of the recess 30, in which the locking clip 37 engages in or not correctly inserted fuse insert 5 and in the shift rocker arm rests 31st The contact-side part of the cylindrical roller 44 thus serves as a drive arm 45 for the toggle lever 33 and thus for the actuation of the contact bridge 15 via the push rod 25. The kontaktabseitige part of the cylindrical roller 44 is referred together with the L-shaped part as actuating 46th This actuator 46 is divided by the arranged in the transition region between the cylindrical roller 44 and the L-43 horizontal leg knee joint 49 in an inner 47 and outer leg 48th The knee joint 49 is acted contrary der.Einschaltrichtung 41 of the rocker arm 16 by a concentrically mounted with its axis of articulation 50 Torsional 51st The urging force is transmitted through the free ends 53,54 of the torsion spring 51 by this lie at the bend direction 55 facing side of the inner 47 and outer leg 48th The torsion spring has a spring constant such that the forces transmitted through them are larger than the to be overcome Einschaltkräfte, but smaller than the locking force of the locking produced by the locking bracket 37 56th This remains the driving operation at non-blocked shift rocker 16 (Fig. 1), the knee joint 49 by the spring loading substantially in its extended position. When blocked shift rocker (Fig. 3), the knee joint 49 is converted to its bent position.

The FIG. 3 shows a particularly advantageous embodiment for the formation of the shift rocker 16 with her knee 49. The knee joint 49 is namely in the in the transition region between the cylindrical roller 44 and L-Horizontal legs 43 extending recess 57 without the free ends 53,54 the torsion spring 51 protrude above the Umrißfläche the shift rocker 16th From this recess 57 extends starting the dividing 58 in the peripheral region of the cylindrical roller 44. inner 47 and outer legs 48 have mutually facing abutment surfaces 59,60, which in the extended position of the knee joint 49 (Fig. 1.2) into each einliegen. The angled shape of the abutment surfaces 59,60 is vorteilhalft in such a way that occurring virtually in any direction actuation forces are well distributed through the positive contact of the angled surfaces. The special design of the rocker arm 16 as an L-shaped part and cylindrical roller 44 also creates an increase in the mutual stop surfaces 59,60, whereby the occurring specific surface pressures are further reduced.

Through multiple, parallel juxtaposed circuit breaker 1 according to FIGS. 1-3, a multi-pole switch block can be formed. In such switch blocks each shift rockers are mounted coaxially on a rotation axis 16 28th According to the invention advantageous when doing the inner leg 47 of the actuator arm 46 and the drive arms 45 forming cylindrical rollers 44 are rigidly interconnected. In practice this is achieved in that an integrally molded, continuous cylindrical roller 44 is used for the individual circuit breaker 1 of the fuse block. Due to this rigid connection is ensured that, when locking of a fuse switch 1 of the whole fuse block is locked by engagement of the respective locking bracket 37 in a recess 30th Since the outer leg 48 of the rocker arm 16 are in each case be bent through the knee joint 49, the fuse block neither operated nor the detent 56 by forcibly transferring the rocker arm 16 may be in the ON position (Fig. 1) are destroyed.

Due to the rigid connection of the outer legs 48 of the operating arms 46 of each circuit breaker 1, they act as a unified whole as multipolar fuse block, wherein the locking function starting prevents the operation of the entire block with or not properly inserted fuse insert 5 each from a single pole. In this case, the rigid connection of the cylindrical rollers 44 is not necessary to form a cohesive component. Namely, only a drive arm 45 is blocked by the lock, only one buckling torque on all knee joints, but no more Einschaltdrehmoment the unblocked drive arms is the rigid connection of the outer leg 48 mutually transferable.

LIST OF REFERENCE NUMBERS

<ul><li>1 circuit breaker</li><li>2 housing half</li><li>3 through hole</li><li>4 shaft</li><li>5 fusible</li><li>6 terminal</li><li>7 terminal</li><li>8 threaded glasses</li><li>9 holding cap</li><li>10 supply line</li><li>11 screw cap</li><li>12 head contact cap</li><li>13 Fußkontaktkappe</li><li>14 counter contact</li><li>15 Contact bridge</li><li>16 shift rocker</li><li>17 contact end</li><li>18 "</li><li>19 counter-contact end</li><li>20 "</li><li>21 contact tab</li><li>22 closing spring</li><li>23 "</li><li>24 housing wall</li><li>25 plunger</li><li>26 arrow direction</li><li>27 housing wall</li><li>28 axis of rotation</li><li>29 end</li><li>30 recess</li><li>31 shift rockers handlebar</li><li>32 handlebar</li><li>33 toggle</li><li>34 free end</li><li>35 notch</li><li>36 joint axis</li><li>37 locking bracket</li><li>38 end</li><li>39 free end</li><li>40 contact spring</li><li>41 switch-on direction</li><li>42 border</li><li>43 horizontal leg</li><li>44 cylindrical roller</li><li>45 drive arm</li><li>46 actuating arm</li><li>47 inner leg</li><li>48 outer leg</li><li>49 knee</li><li>50 joint axis</li><li>51 torsion spring</li><li>53 free end</li><li>54 "</li><li>55 articulated direction</li><li>56 latching</li><li>57 recess</li><li>58 dividing</li><li>59 stop surface</li><li>60 "</li></ul>