FI107281B - Water closet flushing system and drive mechanism - Google Patents

Abstract

The invention relates to an actuating mechanism for a flushing system having an outlet device (11) arranged in a flush cistern (10) and an inlet device (48). This inlet device has a float device (40) for controlling the supply of liquid into the flush cistern (10) by an inlet valve (48) included in the inlet device (48). The float (40) of said float device is operatively connected to the inlet valve (48) via a link system (47) for opening and closing the inlet valve (48) depending on the liquid level in the flush cistern. The outlet device (11) of the actuating mechanism comprises a release means (49) for opening the outlet valve (11) of the outlet device. According to the invention, the actuating mechanism has a locking device (54-62) for preventing the initiation of a new flushing operation before the flush cistern (10) has again been filled with liquid to above a predetermined minimum level. <IMAGE>

Description

107281

Water closet flushing system and drive mechanism

The present invention relates to water closets and, in particular, to a new and improved flushing system which substantially permits the reduction of the force required to initiate flushing operation using a flap based flushing system. The invention also relates to an operating system which is particularly suitable for use in such a new and improved flushing system.

10 GB patent application 2,205,505 proposes a flushing system for water closets with a double flap embedded in a flushing tank. This shovel has a somewhat winding cord with four parallel conductor arms and U-folds in series to connect these conductor arms. The centerpiece is downward and connects the lower ends of the two centerline arms, while the two outer U-arms are upwards and connects the upper ends of the centerline branch to the top ends of the outer conductor arms. This approximately sinusoidally bent conduit is fitted into the flushing tank and completely submerged in water when the flushing tank is filled with water. The first vertical guide branch acts as a suction tube for the blade, and the last vertical guide branch serves as the outlet for the blade and is connected to the flushing threshold at the top of the toilet. Further, from the top end of the first upward U-fold, a downwardly directed U-deflector duct is connected, which at the upper end of its second U-branch is connected to an upward third U-fold at a certain distance below the peak of this U-fold. This vent pipe, shaped as a U-fold 25, acts as a water trap in the flush system start position when the tank is full. To initiate the rinsing operation, the water in the water trap is conveyed through a balloon connected to the lower U-web of the U-deflector duct, which, when pressed and thus increasing in air pressure, displaces water in the water trap and discharges it into the outlet. In this way, a connection is made between the first upward U-fold end and the third upward U-fold so that the air enclosed in the first upward U-fold can be vented through an exhaust duct so that the entire winding loop is intended to be filled with water. suction to remove most of the water in the flushing system to the outlet. When the maximum amount of water has been drawn from the purge tank 107281 2 and air begins to leak into the double flap, a certain amount of water remains in the k-flap and also in the U-fold duct. When the water level in the water tank subsequently rises, the water remains in the double spatula even though the water levels in the first, second, and third conduit branches are displaced 5 vertically relative to each other. The system also comprises a second U-tcit wire connected to the tip of the third U-folded double blade wire and extends overnight to the maximum water level in the flushing tank and opens at a level for the minimum water level in the flush u tank. When the water level in the flushing tank has dropped below the bottom end of this U-fold 10, the air is aspirated into the double flap and the flushing operation is thus interrupted.

DK Patent Publication B-57 606 describes a flushing tank in which a type of double blade is used. In this case, the formation is a flushing mechanism with a water trap. A plunger is immersed in this water block, which when raised lowers the water level of the water trap and thus also reduces the water column pressure. As a result, the fluid in the water trap is no longer capable of vgs-suppressing the pressure from the air captured by the double blade, and the \ e-loop effect thus ceases so that air in the first upward U-fold of the double blade is diffused into the open air. The actuator mechanism is located in an upwardly directed compartment at the inlet end of this U-fold. However, this mechanism has not proven to be completely satisfactory in operation and has often encountered difficulties in setting up and maintaining shovel operations. This is probably due to the fact that air can enter the mechanism between the drive piston and the wall of the water trap leg 25 in which the piston is located. The result is a left-sided air leak into the trap, which degrades or interrupts the trap. Also, positioning the actuator mechanism above the inlet branch of the double blade carries certain disadvantages in that the exhaust air must flow upstream of the flushing water entering from the flushing tank. 30 This also makes it more difficult to completely deflate the first U-fold of the double blade e. In fact, residual air is most detrimental to blade performance.

The system described in British Patent Application 2,205,595 is an improvement over prior art patch systems, but still suffers from a number of disadvantages that have led to the system not being as successful as it should have been. One disadvantage is the poor performance of the system, which at least partially depends on the difficulty of removing the completely enclosed air from the first upward U-fold. Another disadvantage is the design of the drive mechanism, i.e. the use of the balloon, which is compressed to form a displacement and remove the remaining water in the duct, acting as a water trap. As with other known siphon-based flushing systems, this drive technology requires substantial forces to initiate the flushing function. First, it has proved difficult to completely displace and remove the water in the vent pipe by means of a balloon, and if not completely drained, the remaining water prevents or at least counteracts the removal of the airlock or plug in the first 10 U-folds. Secondly, it is often difficult to get the user to change his or her habits, i.e., the amount needed to start the flushing function by pressing the button, lifting the valve stem, or flushing the valve flap.

It is an object of the present invention to provide an improvement of the flushing systems and drive mechanisms described in GB-A-2,205,595 and DK-B-57,606. This and other objects of the invention are accomplished by a flushing system and drive mechanism having the features set forth in claims 1 and 6, respectively. The sub-claims define particularly advantageous embodiments of the invention.

The invention starts with a flushing system according to GB patent application 2,205,595, i.e. a flushing system having a double flap fitted in a flushing tank and in the form of a substantially sinusoidal folded wire having four substantially vertical parallel-mounted, 25-wire splices and U interconnecting the cable arms, wherein the central U-branch is downwards and connects the lower ends of the two center cable arms, while the two outer U-folds are upwards and connect the upper ends of the central cable branches to the upper ends of the external cable branches; it is completely submerged in water when the flushing system is filled with the first vertical guide branch intended to serve as a siphon suction tube and the last vertical guide branch intended to serve as the blade outlet pipe and connected to the top of the toilet bowl. In summary, the invention is to prevent the removal of flushing water by means of an air trap or plug which is enclosed in a double flap and during which the flushing procedure is initiated. 4 107231 in the invention the air lock is evacuated via a venting tube whose one end is connected to work in the double siphon at a point located in the air lock in the U-taittees> a certain distance below the crest of the U-bend towards the outlet side. Therefore, the connecting pipe is located downstream of the flushing fluid, 5 and can thus be vented in a more reliable manner. The vent pipe extends above the level of the top of the double blade and is connected at one end to a piston chamber in which a starter piston is provided for vertical movement. The Mänlä chamber and the starter piston act as part of the drive mechanism. The air outlet s-tube connection to the piston chamber is located a certain distance above the bottom of the piston chamber 10 to define the lower end of the liquid pool piston chamber. The piston chamber is filled with water while in the closed state and when the starter piston is raised, the closed liquid flows down into the liquid pool below the vent duct connection and the air lock is removed through the piston chamber. The actuator mechanism, which is particularly well suited for this flushing system s-15, has a locking device to prevent a fresh start of flushing operation before the liquid is again filled into the flushing tank above a certain minimum level above the vent pipe.

The invention will now be described in more detail below with reference to the accompanying drawings, which show some preferred embodiments of the invention. However, these should not be construed as limiting the invention.

Figures 1-6 schematically illustrate the inventive principle and its operation at various stages of the removal procedure.

Figure 7 is a vertical sectional view of a specific embodiment of the rinse system and actuator mechanism of the invention.

Fig. 8 shows Fig. 7 in a matching stitch corresponding to Fig. 3.

Figure 9 shows an embodiment of Figure 7 in a state similar to Figure 5.

Figure 10 is a top view of the embodiment of Figure 7.

Figure 11 is a sectional view taken along line XI-XI of Figure 7.

Fig. 12 shows the embodiment of Fig. 7 from the left in relation to Fig. 7.

Figure 13 illustrates the embodiment of Figure 7 from the right with respect to Figure 7.

Figure 14 is a front elevational view of Figure 7 with respect to Figure 7.

Figure 15 is a sectional view taken along line XV-XV of Figure 14.

107281 5

Fig. 16 shows parts of a second embodiment of a flushing system according to the invention and a drive mechanism whereby this figure corresponds to the fit state of Fig. 7.

Figure 17 is a view similar to Figure 8 but showing said second embodiment of the invention 5.

Fig. 18 is a view similar to Fig. 9 but showing said second embodiment of the invention.

Figures 1-6 schematically illustrate a flushing system and actuator mechanism of the present invention. The flushing container 10 has a discharge device 11 embedded in the discharge container 10. The discharge device is designed as a double flap in the form of an approximately sinusoidal extending cord having four parallelly spaced conductor arms 12, 13, 14, 15 and U-folds 16, 17, 18 connecting the conductor arms. The middle U-fold is downward and interconnects two central lead branches 13, 14. The two outer U-arms 16, 18 point upwards to 15 and connect the upper ends of the two central lead arms to the upper ends of the outer lead branches 12, 15. The first vertical guide branch 12 is intended to act as a suction tube for the blade. The last vertical guide branch 15 is intended to serve as a blade outlet and is conventionally connected to a flushing threshold (not shown) at the upper end of the toilet bowl.

The flushing system also includes an air outlet tube 19 which serves to remove air which, when the flushing tank 10 is filled with liquid, is enclosed in a first upward U-fold of the double blade. The other end of the air exhaust pipe 19 is connected to a downstream position of this U-fold and extends beyond the top level of the upward U-folds 16, 18 to be connected at one end to the actuator mechanism 20. This mechanism includes a non-return valve 21 comprising a substantially vertical piston chamber 22, in which the actuating piston 23 is arranged for vertical movement. The upper end of the piston chamber 22 may be connected to the ambient air at a point above the maximum water level 30 in the flushing tank. The piston chamber further comprises a fluid bath 25 located below the opening of the vent pipe 19 in the piston chamber 22. The fluid vessel has sufficient volume to hold the liquid remaining in the starter piston chamber 22 and the vent pipe 19 when the flush tank 10 is filled. At the top end, the starter piston 23 and the starter piston chamber 22 are designed 35 to provide an air and water-tight connection inside the conically spread part 26. Alternatively, special seals may be used between the outwardly facing flange 107281 6 and the gripping surface, as will be described later. This gasket inside the conically applied part or equivalent gasket provides the desired function of the non-return valve. The starter piston 23 and the piston chamber 22 are configured such that when the starter piston is raised, air is drawn into the starter piston chamber 22 and, accordingly, the liquid in the starter piston chamber and obviously in the n-outlet is flowing down to the liquid pool 25. The first U (Fig. 1) can be discharged through the vent pipe 19 and the non-return valve 21.

Figures 1-6 show the sequence of the various stages of operation. Thus, 1; u-10 flow 1 shows a flushing system in the start position when the tank 10 is filled with liquid and the starter piston 23 is in its lower position, where the applied part 26 is sealingly engaged with the starter piston chamber. In this position, the air is enclosed in the U-folding 16 and the deaeration pipe 19. Overpressure prevails, as evidenced by the differences between the fluid levels 31, 31 'in the first three conduits 12, 13 and 14.

To initiate the rinsing operation, the starter piston 23 is raised to nos so that air can pass from above to the starter piston chamber 22 and n, so that the liquid enclosed therein flows down into the liquid basin 25 to expose the vent 19 opening. As a result, the air enclosed in the U-flap 16 is vented by fluid pressure through the starter piston chamber. The resulting liquid wave causes the liquid to fill the first U-fold of the double blade 16 and then the entire blade as well so that the blade is started and the liquid is removed from the flushing tank. Figure 3 shows a state in which the first three conduits 12, 13, 14 are completely filled with liquid. With continued suction of fluid 25 into the double flap, this will be completely filled with fluid, as will the vent pipe 19 and the starter piston chamber 22 (Figure 4). In this position, the starter piston has returned to its original position with shut-off non-return valve function within the spread portion 26.

Figure 5 shows the next step as rinsing proceeds. During this step, there is a negative pressure in the double flap and thus also in the vent pipe 19 and the starter piston chamber 22. The suction of air into the double blade through the starter piston chamber is prevented by the above-mentioned non-return valve function. Flushing proceeds until air is drawn into the double spout through the inlet of the conduit branch 12. Figure 6 shows this state. If a smaller amount of flushing fluid is desired for the pie-35 than that corresponding to emptying up to the lower end of the first line, it is possible to form holes in the various balances 107281 along the first line for e.g. 4 liters or 6 liters. In any case, the siphoning effect is interrupted when air is drawn into the first duct branch. When this occurs, a certain amount of fluid remains in the second U-fold. When refilling the rinse tank with 5 fresh rinses, this liquid column is finally moved to take the position shown in Figure 1.

The main advantage of this system is that the flushing operation is easily initiated and requires little force for the liquid column in the piston chamber 22 above the inlet 29 of the vent pipe 19 to substantially overcome the overpressure represented by the difference between the liquid surfaces 31 and 31 '. Further, the system is advantageous in that the starter ball used in GB patent application 2,205,595 is abandoned and the flushing operation can be initiated by conventional means, i.e., by lifting the plunger or depressing the button to raise the plunger. The pick-up station at the inlet 29 of the vent pipe 19 thus overcomes the drawbacks of the prior art device according to GB patent application 2,205,595 in that the air is vented downstream from the top of the U-fold. In this way, improved or complete air removal is achieved, especially if the conductor arms are designed to promote laminar flow.

Figure 7 shows a preferred embodiment of the flushing system and actuation mechanism of the present invention. In the figure, the various components are shown in the same positions as in Figure 1. The flushing system is mounted on the bottom of the flushing tank 27. The double blade 11 has four conductor arms 12, 13, 14, 15 arranged substantially vertically side by side. As shown in Figure 11, the lead arms have a flattened cross section to promote laminar flow. However, the cross-sectional shape need not be as flattened as shown in Fig. 11, so that an oval or square cross-section may be used. In addition, the twin blade flow channel is preferably constructed smaller than its throughflow area from line branch 12 to line 30 in line 15 to improve flow, increase flow rate, and promote laminar flow.

The last conduit branch or outlet pipe 15 is connected to the outlet sleeve 28, which in turn is connected to a conventional flush toilet threshold (not shown).

As shown in Figure 7, the vent pipe 19 is connected to a second conduit branch 13 at a location away from the first conduit branch and 107281 8 near the upper end of the second conduit branch 13, i.e. a wall surface where air flows when emptying the enclosed air bubble. The reason for such placement is that the inlet 29 of the vent pipe 19 should be positioned so far downstream that the air is completely displaced by the water flowing into the conduit 12 upon initiation of the flushing operation. The outlet end of the vent pipe 19 is connected to the piston chamber 22, preferably located just below the liquid surfaces 31 in the first conduit branch and the third conduit branch in the flushing system start position (see Fig. 7).

In this preferred embodiment, the starter piston 23 has an outwardly facing flange 32 which engages the edge 33 of the starter piston chamber 22 in the closed position of the non-return valve. If required, the flange may be provided with a gasket to engage it with edge 33. the purpose of which is explained in more detail below (Figure 11). These floating bodies are disposed outside the starter piston chamber 22 and hang below the night edge 33 of the chamber. A piston 35 is provided on the upper surface of the piston, which is pivotally mounted on the locking catch 36 for pivoting motion between the locked position indicated by the full line in Fig. 7 and the detached position 20 indicated by the dotted line. In the locked position, the latch locking surface 37 engages a fixed locking surface on the leg 38. To limit the outwardly swinging motion of the locking latch, here preferably is a projection 39 which stops the upwardly swinging movement by engaging the upper surface of the piston 23.

In the embodiment of Figure 7, the flotation of the flushing system is designed to be a downwardly open bell, which is guided in the flotation chamber 41 for vertical movement therein. The chamber 41 is integrally connected to the double flap 11 and the piston chamber 22. The float chamber 41 is intended to be filled with a flushing fluid, which is provided by a liquid which fills the flushing tank over and up between the top of the float chamber and the float 40. At the lower end of the floating chamber is formed a rear: u - ** · valve 42 in the form of a pivotable valve plate mounted for pivoting about a pivot pin 43 adjacent the top of the floating pellet. This non-return valve is inclined so that it is forced downward by gravity when in its normal position to lean against the side of the e-35 chamber and seal against the valve seat 44 cover. With this arrangement, the float chamber is gradually emptied as the fluid level 107281 9 in the flushing tank lowers. On the other hand, the flotation chamber is prevented from being filled with flushing liquid until the flushing liquid can flow over the top of the flotation chamber. This arrangement allows for a faster filling of the flushing tank and does not include the usual gradual reduction of fluid supply during the final step of the filling procedure.

The float 40 has a pillar 45 with a pivot pin 46 formed at its upper end. This pin is connected to a guide arm 47 for a conventional inlet valve 48. The valve 48 is closed in the position shown in Figure 7 and open in the position shown in Figure 9.

10 for actuating the actuating mechanism in the actuator mechanism, the embodiment of Fig. 7 has a release means 49, which in this embodiment is a push mechanism having a laterally extending actuator 50 resiliently biased upwardly by a spring unit 51. The spring unit 51 may be formed with. The free end of the spring unit 51 is fixed to the mechanism body 53 in a suitable manner, e.g. by means of protruding pins 52. The body 53 is formed to form a solid structural member with a fork 38 and thus forms a solid member. A pivot pin 54 is mounted on this fixed member. The detent lever 55 is pivotally mounted on the pivot pin 54. The other end of the II-20 maize lever is designed as a cam follower 56 that engages the upper surface of the float 40, thereby serving as a guide surface 57. the detector lever 55 has a pivot pin 58 on which the release rocker arm 59 is pivotally mounted. In this embodiment, the rocker lever is formed as a double-armed lever and engages the actuator 25 50 on a guide 60 on one end and a locking catch 36 on the other end 61.

The downward pressing of the release means 49 against the action of the spring 51 produces a clockwise rotation of the release rocker 59 relative to Figure 7 so that the locking latch 36 is released from its engagement with the fork 38 and rotated in dashed position. This means that the actuating piston 23 is disengaged and raised by its floating bodies 34 to the position shown in Fig. 8, where the upper surface of the actuating piston comes into engagement with the fork 38.

Figure 8 shows only a momentary state for describing the operation of the mechanism. In this instant state, the piston 23 is thus raised so that the liquid enclosed in the piston chamber in the vent pipe can flow down to the fluid bath 107281 10 25. As a result, air enclosed in the first U-fold 36 and portions of the second conduit branch I3 flows out air over the liquid surface 24 of the container 10. This initiates the funnel function, and the flushing fluid is removed to the flushing threshold of the water-5 toilet as described above. As the fluid level in the flushing tank gradually decreases, the fluid level le s in the float chamber 41 also decreases because water can flow out through the non-return valve 42. In this way, the detector lever 55 is rotated clockwise relative to Fig. 7. This also means that the vertical position of the pivot pin 58 is calculated to be the corresponding *; ti. Following the calculation of the position of the pivot pin 58 relative to the fixed pivot pin 54, the release rocker arm 59 is also lowered. As a result, an opening is formed between the rocker arm end 60 and the actuator 50. Because of this aperture, it is not possible to restart the rinse lupus procedure until the fluid level in the rinse system has been restored. The openings 15 between parts 50 and 60 are maintained throughout the filling procedure by the float 40, which remains in its lower position (Fig. 9) until water flows into the float chamber 41 through the top of the float chamber because the check valve 42 prevents water from entering. However, the float chamber 41 is not sufficient to maintain this locking function against a re-activation of the flushing function. However, it is evident that the mechanism is designed such that it is not possible to restart the flushing operation until the water level in the flushing systems is returned to the position above the vent pipe 19.

Figure 9 shows the state of the parts after the fluid level has dropped to such an extent that the floating bodies 34 are no longer able to hold the starter piston 23 in the raised position. As soon as the actuating dampers 23 have been reset to the position shown in Fig. 9, the operation of the non-return valve is effected, i.e. there is a sealing connection between the flange 32 and the edge of the piston chamber 22. This function is also promoted by engaging latch 36 with fork 38. The floaters 34 should be designed for a lift force adjusted to achieve the check valve sealing function before the fluid level in the flushing system has dropped below the upper peak of the vent pipe 19. In fact, it is essential that the liquid remain in the vent pipe and in the piston chamber so that the air plug or latch remains in the U-fold 16 when the flushing tank 35 is again filled with liquid.

107281 11

Figures 7-15 show a preferred embodiment of the actuator mechanism of the flushing system according to the invention. However, the drive mechanism may also be designed in a different manner, whereby a possible embodiment is shown in Figures 16-18. In this case, there is no match for the locking catch 5 36, but the release rocker lever 59 raises the piston 23 by directly engaging and lifting the lateral hook 63 on the piston 23. As soon as the piston through hook 63 is lifted to undo the sealing contact between flange 32 34 exert a lifting force and raise the piston to the position shown in FIG. In this case, also the restart of the flushing function is prevented by lowering the pivot pin 58 by the pivoting motion of the detector member 55 about the fixed pivot pin 54. In other respects, this embodiment functions in the same manner as the embodiment of Figures 7-15.

The actuator mechanism need not necessarily have a single-lever indicator lever 55. This lever may also be double-levered, in which case the reversal of movement may be performed in an appropriate manner so that pressings or strokes in the release means initiate the flushing operation. In the light of the above principles, such a modification of system 20 can easily be made by one skilled in the art.

The double flap of the flushing system may suitably be formed of plastic material and made in two halves against each other, as shown in Figures 11-13. As mentioned earlier, the different conductor branches 12-15 need not be exactly in the flattened form shown in 11, but the wires 25 are preferably of such flattened shape or oval shape to form or promote a laminar flow. In fact, the laminar flow facilitates the effective evacuation of all enclosed air at the start of the flushing operation. Operation of the drive mechanism without any floating bodies 34 is also within the scope of the invention. In such a case, the trigger piston can be raised directly as indicated in Figures 1-6. The actuator mechanism described above is well suited for the flushing system of Figures 7 to 18, but may of course also be used for other flushing systems where it is desirable to prevent the flushing function from restarting until a certain minimum level of fluid in the flushing tank 35 is exceeded.

107281 12

In order to allow the amount of flushing fluid to be varied in each flushing operation, the first conduit branch 12 may have air intake holes 64 in different vertical planes, e.g. one level for flushing 4 liters of flushing fluid and a second level for removing 6 liters of flushing fluid. When installing the unit, the installer then plugs in the air suction hole or holes 64 that are not being used.

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Claims (5)

107281 13 An actuator mechanism for a flushing system, comprising an outlet device (11) fitted to a flushing tank (10) and an inlet device (48) for controlling the delivery of fluid to the flush tank (10) by an inlet valve (48) included in the inlet valve (48). ), wherein the float (40) of said floating device is operatively connected to an inlet valve (48) via a pivot system (47) for opening and closing the valve (48) depending on the fluid level in the flushing tank, the outlet device (11) of the actuator mechanism for opening the outlet valve (11), characterized in that the actuator mechanism has a locking device (54-62) to prevent the start of the new flushing operation before the flushing tank (10) is again filled with liquid above a predetermined minimum level. Drive actuator mechanism according to claim 1, characterized in that the locking device (54-62) for refilling has a detector lever (55) pivotally mounted on a fixed pivot pin (54) and having a cam follower (56) with a detector lever (56). 54) operatively coupled with a guide surface (57) on the float (40) for sensing its movements vertically and for rotating the detector lever (55) in a fluid level in the piston 20 flushing tank (10), wherein the detector lever (55) has a release rocker (59) mounted pivotally on the detector lever (55) for pivoting about the rocker arm shaft (58) spaced from the detector lever pivot pin (54) so that the release means (49) has a drive means (50) for engaging the rinsing function; 25 chained to the release rocker arm (59) to pivot this arm and the opening of the outlet valve (11) and that the pivot arm shaft (58), the pivot pin (54) of the detector lever (55) and the release means actuator (50) are arranged relative to each other to prevent any engagement between the release means actuator (50) and the rocker arm (59). the known fluid level in the flushing bag (10) is below said predetermined level. Actuator according to Claim 2, characterized in that the outlet valve (11) is connected to an opening float (23, 24) which is fitted to the flushing tank (10) and has a locking lever (36) pivotally mounted on the opening float (23). , 24) and engages, when the outlet valve (11) 35 is closed, on a fixed support (38) and is disposed on a path of movement of the release lever (59) to disengage, when the actuator mechanism is disassembled, said support (38). Trigger mechanism according to Claim 2 or 3, characterized in that the detector lever (55) is a monochrome lever (55), the end of which has a pivot 5 mounted pivotally on a fixed pivot pin (54) and has a cam follower (56) at one end the float arm (40), and that the release rocker arm (59) is a two-color rocker arm (59) with a rocker arm shaft (58) disposed on the detector arm (55) between its two ends Trigger mechanism according to claim 2, 3 or 4, characterized in that the release means (49) has a resetting means (51) for loading the release means (49) in a direction such that the actuating means (50) of the r-turning means is removed from the release rocker (59). . • · • · 107281 15