Abstract
A trigger device includes an actuation device for converting an electrical activation signal into a movement of an actuator, a control device, which is connected to the actuation device for transmitting an actuation signal and which comprises receiving means for receiving an activation signal, and a power supply unit for supplying the actuation device and the control device with electric power.
Claims
1. A piston-cylinder arrangement comprising: a piston-cylinder unit including at least one unlocking mechanism; a trigger device including an actuation device for converting an electrical actuation signal into a movement of an actuator; a control device connected to the actuation device for transmitting an actuation signal and including receiving means for receiving an activation signal; a power supply unit for supplying the actuation device and the control device with electric power; wherein the actuator is connected or connectable to a force transmission element, which is connected or connectable at its end opposite the actuator to the at least one unlocking mechanism of the piston-cylinder unit, wherein the force transmission element comprises a plurality of cable pulls and/or a plurality of rods, wherein the plurality of cable pulls and/or rods are arranged on the actuator such that during a displacement of the actuator in a first direction, a first quantity of cable pulls and/or rods activates respective first unlocking mechanisms and during a displacement of the actuator in a second direction, a second quantity of cable pulls and/or rods activates respective second unlocking mechanisms.
2. The piston-cylinder arrangement according to claim 1, wherein the control device is set up to interrupt or produce a power supply from the power supply unit to the actuation device.
3. The piston-cylinder arrangement according to claim 1, wherein the power supply unit comprises a battery pack.
4. The piston-cylinder arrangement according to claim 1, wherein the actuation device comprises an electric motor which drives the actuator by a gear unit.
5. The piston-cylinder arrangement according to claim 1, wherein the actuation device comprises an electromagnet which drives the actuator by a translation device.
6. The piston-cylinder arrangement according to claim 1, wherein the actuator is connected or connectable to a force transmission element, which is connected or connectable at its end opposite the actuator to at least one unlocking mechanism of the piston-cylinder unit.
7. The piston-cylinder arrangement according to claim 6, the piston-cylinder unit comprising: a cylinder, which is filled with fluid, and a piston, which divides the cylinder into two working spaces, wherein the piston has at least one through-opening which connects the two working spaces, the at least one through-opening being selectively sealed by a valve, wherein the actuator switches the valve.
8. The piston-cylinder arrangement according to claim 1, further comprising a transmitter unit, which transmits the activation signal to the control device.
9. The piston-cylinder arrangement according to claim 8, wherein the transmitter unit is wirelessly connected or connectable to the control device.
10. The piston-cylinder arrangement according to claim 1, wherein the first quantity of cable pulls and/or rods and the second quantity of cable pulls and/or rods are the same.
11. The piston-cylinder arrangement according to claim 1, wherein the receiving means is set up for wireless reception of the activation signal.
12. A trigger device comprising an actuation device configured to convert an electrical actuation signal into a movement of an actuator; a control device connected to the actuation device, the control device configured to transmit an actuation signal and including a receiver for receiving an activation signal; a power supply unit in electrical communication with the actuation device and the control device; and a plurality of cable pulls and/or rods arranged on the actuator such that during a displacement of the actuator in a first direction, a first quantity of cable pulls and/or rods are configured to activate a first unlocking mechanism of at least one associated piston-cylinder unit and during a displacement of the actuator in a second direction, a second quantity of cable pulls and/or rods activates respective a second unlocking mechanism of the at least one associated piston-cylinder unit.
13. The trigger device according to claim 12, wherein the receiver is set up for wireless reception of the activation signal.
14. The trigger device according to claim 12, wherein the control device is set up to interrupt or produce a power supply from the power supply unit to the actuation device.
15. The trigger device according to claim 12, wherein the power supply unit comprises a battery pack.
16. The trigger device according to claim 12, wherein the actuation device comprises an electric motor which drives the actuator by a gear unit.
17. The trigger device according to claim 12, wherein the actuation device comprises an electromagnet which drives the actuator by a translation device.
Description
(1) In the following, the invention is described in detail with reference to two embodiments and the accompanying drawings, in which:
(2) FIG. 1A is a schematic plan view of a first embodiment of a trigger device according to the invention, which is connected to a Bowden cable;
(3) FIG. 1B is a perspective view of the embodiment of the trigger device connected to the Bowden cable shown in FIG. 1A;
(4) FIG. 2A is a schematic plan view of a second embodiment of the trigger device according to the invention, which is connected to a Bowden cable;
(5) FIG. 2B is a perspective view of the second embodiment of the trigger device according to the invention shown in FIG. 2A;
(6) FIG. 3A is a schematic plan view of a third embodiment of the trigger device according to the invention, which is connected to two Bowden cables;
(7) FIG. 3B is a cross-sectional side view of the third embodiment of the trigger device according to the invention shown in FIG. 3A;
(8) FIG. 3C is a perspective view of the third embodiment of the trigger device according to the invention shown in FIG. 3A;
(9) FIG. 4A is a schematic plan view of a fourth embodiment of the trigger device according to the invention, which is connected to two Bowden cables;
(10) FIG. 4B is a cross-sectional side view of the fourth embodiment of the trigger device according to the invention shown in FIG. 4A;
(11) FIG. 4C is a perspective view of the fourth embodiment of the trigger device according to the invention shown in FIG. 4A;
(12) FIG. 5A is a schematic plan view of a fifth embodiment of the trigger device according to the invention, which is connected to two Bowden cables;
(13) FIG. 5B is a cross-sectional side view of the fifth embodiment of the trigger device according to the invention shown in FIG. 5A;
(14) FIG. 5C is a perspective view of the fifth embodiment of the trigger device according to FIG. 5A;
(15) FIG. 5D is a perspective exploded view of the fifth embodiment of the trigger device according to the invention shown in FIG. 5C;
(16) FIG. 6A is a schematic plan view of a sixth embodiment of the trigger device according to the invention, which is connected to two Bowden cables;
(17) FIG. 6B is a cross-sectional side view of the sixth embodiment of the trigger device according to the invention shown in FIG. 6A;
(18) FIG. 6C is a perspective view of the sixth embodiment of the trigger device according to the invention shown in FIG. 6A;
(19) FIG. 7A is a schematic plan view of a seventh embodiment of the trigger device according to the invention, which is connected to two Bowden cables;
(20) FIG. 7B is a cross-sectional side view of the seventh embodiment of the trigger device according to the invention shown in FIG. 7A;
(21) FIG. 7C is a perspective view of the seventh embodiment of the trigger device according to the invention shown in FIG. 7A;
(22) FIG. 8A is a schematic plan view of an eighth embodiment of the trigger device according to the invention, which is connected to four Bowden cables;
(23) FIG. 8B is a cross-sectional side view of the eighth embodiment of the trigger device according to the invention shown in FIG. 8A;
(24) FIG. 8C is a perspective view of the eighth embodiment of the trigger device according to the invention shown in FIG. 8A.
(25) In FIG. 1A, a trigger device is generally denoted by 10. The trigger device 10 comprises a housing 12 which is in the form of a rectangular box in the present embodiment. The housing can, for example, be produced from plastics, metal, a composite material or from any other suitable material. The housing 12 incorporates a battery pack 14, a control device 16 and an actuation device 18, which are described in detail below. Furthermore, a sheath 20 of a Bowden cable 24 is preferably supported on the housing 12 by means of a support screw 26, the support screw 26 being in threaded engagement with the housing 12 in the present example and therefore, following a rotation of the support screw 26, it can be screwed out of the housing or into the housing, as a result of which the free length of the sheath 20 of the Bowden cable 24 can be lengthened or shortened in a known manner. The housing can, for example, be watertight and/or dustproof, which can be expressed by an appropriate IP classification.
(26) The battery pack 14 can, for example, comprise commercially available batteries such as AA batteries or AA rechargeable batteries or an application-specific battery. The battery can be either rechargeable or non-rechargeable and permanently fitted or replaceable as described in detail above, to which reference is expressly made here.
(27) The control device 16 is supplied with electric power by the battery pack 14 and comprises, for example, an ECU. Furthermore, the control device 16 comprises reception means 28, which are in the form of an antenna in this case. The antenna 28 wirelessly receives an activation signal from an external transmitting unit (not shown). This activation signal is converted by the control device into an actuation signal which is passed on to the actuation device 18.
(28) It should be mentioned at this point that a representation of the electrical connections between the individual components has been omitted and that these electrical connections can be designed in any suitable manner depending on the embodiment, for example they can be provided on a printed circuit board.
(29) In the first embodiment of the trigger device according to the invention, the actuation device 18 comprises an electric motor 30, which is connected to an actuator 34 by means of a gear unit 32. The actuator 34 is connected to an end fitting 36 of a cable 38 of the Bowden cable 24.
(30) As can be seen better from FIG. 1B, the cable 38 leads out of the support screw 26 that projects through the wall of the housing 12 and onwards towards the actuator 34. In this embodiment, the actuator 34 is in the form of a hook in order to provide the end fitting 36 with a corresponding receptacle, which prevents the end fitting 36 being displaced unintentionally relative to the actuator 34. The actuator 34 is connected for conjoint rotation to an output shaft 40 of the gear unit 32. In the present embodiment, the anti-twist protection is achieved by an output shaft 40 of the gear unit 32 that is flattened on one side and a corresponding accommodation of the actuator 34.
(31) If the actuation signal is now forwarded by the control device 16 to the actuation device 18, the electric motor 30 is driven, as a result of which the actuator 34 in turn is rotationally displaced by the gear unit 32. The displacement of the actuator 34 can be performed clockwise or anticlockwise depending on the drive direction of the electric motor 30. In the case, for example, of an anticlockwise displacement of the actuator 34, viewed in the direction of the arrow A (see FIG. 1B), the end fitting 36 is displaced further away from the wall of the housing 12 on which the sheath 20 of the Bowden cable 24 is supported, as a result of which the cable 38 of the Bowden cable 24 is displaced relative to the sheath 20 of the Bowden cable 24 together with the end fitting 36. The actuation signal can, for example, drive the electric motor 30 such that it displaces the actuator 34 and thus the cable 38 of the Bowden cable 24 by a predetermined distance, holds this position for a predetermined time and subsequently moves the actuator 34 together with the end fitting 36 and the cable 38 back into their starting position. Alternatively or additionally, it is possible for the above-described displacement of the cable 38 of the Bowden cable 24 in relation to the outer sheath 20 of the Bowden cable 24 to be performed against an external force, which is applied, for example, at the other end of the cable 38 of the Bowden cable 24, and so the cable 38 of the Bowden cable 24 and thus the actuator 34 is moved back into a starting position by means of this external force as soon as the electric motor 30 is no longer supplied with electric power. Furthermore, it should be pointed out that the actuation device as described above can comprise a coupling.
(32) In FIG. 1B, a nut 42 can also be seen which can be used as a securing device in order to prevent an unintentional rotation of the support screw 26. According to the generally known manner of use of Bowden cables, it is, of course, possible to provide a plurality of nuts without threads on one or both sides of the wall of the housing 12 or the recess in the wall of the housing 12, through which the support screw 26 passes.
(33) In FIGS. 1A and 1B, various fixing devices can be seen which in summary are provided with a reference numeral 44 and which connect corresponding components to the housing 12. Since such fixing devices are generally known, a detailed description of the fixing devices 44 is omitted.
(34) The second embodiment shown in FIGS. 2A and 2B differs from the first embodiment according to FIGS. 1A and 1B merely in the design of the actuation device. Specifically, the actuation device 118 according to FIGS. 2A and 2B comprises an electromagnet 46 and a corresponding actuator 48 instead of the electric motor 30, the gear unit 32 and the rotationally driven actuator 34. In FIGS. 2A and 2B analogous parts are provided with the same reference numerals as in FIGS. 1A and 1B but increased by the number 100. Therefore, the embodiment in FIGS. 2A and 2B is described in the following only to the extent to which it differs from the embodiment according to FIGS. 1A and 1B, to the description of which reference is hereby otherwise expressly made.
(35) The electromagnet 46 shown in FIG. 2A is advantageously a standard electromagnet, as generally known from prior art. In the direction of action of the electromagnet 46, the actuator 48 is arranged at a distance from the electromagnet. The actuator 48 can comprise a plate 50 formed advantageously from a ferromagnetic material, a rod-like portion 52 and a receiving portion 54 for an end fitting 136 of a Bowden cable 124. The rod-like portion 52 of the actuator 48 is mounted by means of a mounting device 56 so as to be translationally and/or rotationally displaceable. The mounting device 56 can be connected to a housing 112 by means of a fixing device 144.
(36) Following transmission of an activation signal from a control device 116 to the actuation device 118 and following a supply of the electromagnet 46 with electric power from the power supply unit 114, the electromagnet 46 is actuated such that it magnetically attracts the plate 50 of the actuator 48. In this manner, a cable 138 of the Bowden cable 124 that is connected to the actuator 48 by means of the end fitting 136 is displaced in relation to a sheath 120 of the Bowden cable 124. Here, the actuator 48 can be displaced towards the electromagnet 46 until the plate 50 comes into contact with the electromagnet 46 or until, for example, another portion of the actuator 48 comes into contact with a corresponding stop. It is also possible that only a predetermined displacement length can be achieved by the cable 138 of the Bowden cable 124, as a result of which the actuator 48 can reach a final position at a distance from the electromagnet 46 following actuation of the electromagnet 46 even without the provision of stops. After the actuator 48 has been held in this final position for a predetermined time by the action of the electromagnet 46, the power supply to the electromagnet 46 is interrupted and so the actuator 48 is displaced back into its starting position. In the embodiment shown in FIG. 2A, the plate 50 rests on the mounting device 56 in the starting position of the actuator 48. The return displacement of the actuator 48 can be achieved either by an external force, for example against the cable 138, or, for example, by a magnetic force, which displaces the plate 50, and thus the actuator 48, in a direction away from the electromagnet 46. This can also be achieved, for example, in that, when it is not being supplied with power, the electromagnet 46 has a magnetic force which acts in the opposite direction to the magnetic force when it is being supplied with power.
(37) According to a piston-cylinder arrangement according to the second aspect of the present invention, the end (not shown) of the Bowden cable 24, 124 that is illustrated in FIG. 1A to 2B is connected to an unlocking mechanism for locking piston-cylinder units, such as gas springs.
(38) The third embodiment shown in FIG. 3A to 3C differs from the first embodiment according to FIGS. 1A and 1B merely in the design of the actuator. Specifically, the piston-cylinder arrangement 200 according to FIG. 3A to 3C comprises an integral actuator 234, which is arranged for connection to two Bowden cables 224, 224 instead of the actuator 34, which is arranged for connection to one Bowden cable. In FIG. 3A to 3C, analogous parts are provided with the same reference numerals as in FIGS. 1A and 1B, but increased by the number 200. The embodiment in FIG. 3A to 3C is described in the following only to the extent to which it differs from the embodiment according to FIG. 1A to 2B, to which description reference is otherwise expressly made here.
(39) The two Bowden cables 224, 224 are arranged on the actuator 234 such that a clockwise rotation of the actuator 234, viewed in the direction of the arrow A in FIG. 3A, brings about a leftward displacement of a cable pull 238 relative to a sheath 220 and a rightward displacement of a cable pull 238 relative to an outer sleeve 220. Alternatively, displacement of the cable pull 238 cannot take place during the rotation of the actuator described above. Instead, for example, an end fitting 236 of the cable pull 238 can disengage from the actuator 234. The same applies, of course, to an anticlockwise rotation, for example with respect to the end fitting 236.
(40) In this embodiment, the actuator 234 is held for conjoint rotation, by means of a toothing system, on an output shaft 240 which is connected to an electric motor 230, if appropriate with the interconnection of a gear unit.
(41) The displacement of the actuator 234, and thus the displacement of the cable pulls 238, 238, for example following a reciprocating rotation of the output shaft 240, can be described as rocker-like.
(42) Alternatively to the aforementioned toothing system between the actuator 234 and the output shaft 240, a coupling device can also be provided between these two elements. As can be seen in FIG. 5D, a ring 458 can be provided, for example on an output shaft 440, the inside of which ring is engaged with a toothing system of the output shaft 440 and accommodates on its exterior what is known as a wrap spring 460, which, for example, is helical. The inner diameter of the wrap spring 460 in its relaxed state is smaller than the outer diameter of the ring 458. On its exterior, the wrap spring 460 has at least one protrusion, which is engaged in a corresponding recess of an element arranged radially adjacent thereto, such as the actuator 234 or the component 434a, which can be engaged with at least one cable pull. Due to the clamping action between the wrap spring 460 and the ring 458, the wrap spring 460 and the element that is engaged therewith by means of the at least one protrusion is displaced according to the direction of rotation of the output shaft 440 following a rotation of the output shaft 440, and thus of the ring 458. A coupling force can be defined by a predetermined fit between the wrap spring 458 and the ring 460. Advantageously, the winding of the wrap spring is designed such that during a displacement of the wrap spring, the element engaged therewith by means of the at least one protrusion and at least one cable pull arranged thereon into a final position, for example of the cable pull, a continuing rotation of the output shaft 440 and of the ring 458 exerts a torsional force on the wrap spring 460 and so the diameter of the wrap spring 460 is enlarged and thus the coupling action between the wrap spring 460 and the ring 458 is greatly reduced or completely stopped.
(43) The fourth embodiment shown in FIG. 4A to 4C differs from the third embodiment according to FIG. 3A to 3C simply in the design of the actuator. Specifically, the piston-cylinder arrangement 300 according to FIG. 4A to 4C comprises an actuator 334 which comprises a plurality of components, instead of the actuator 234 which is designed as an integral component. In FIG. 4A to 4C analogous parts are provided with the same reference numerals as in FIG. 3A to 3C but increased by the number 100. Therefore the embodiment in FIG. 4A to 4C is described in the following only to the extent to which it differs from the embodiment according to FIG. 1A to 3C to which description reference is otherwise expressly made here.
(44) A central pinion gear 334a of the actuator 334 is held for conjoint rotation, by means of a toothing system, on an output shaft 340 which is connected to an electric motor 330, if appropriate with the interconnection of a gear unit. The outer circumference of the pinion gear 334a is at least partially toothed. The toothing system on the outer circumference of the pinion gear 334a engages with two toothed racks 334b, 334c of the actuator 334, which in turn each engage with end fittings 336, 336 which are connected to cable pulls 338, 338 of Bowden cables 324, 324.
(45) The two toothed racks 334a, 334b in this embodiment are mounted by way of example in a housing 312 as can be seen in FIG. 4B.
(46) As can also be seen in FIG. 4B, the two cable pulls 338, 338 are designed as Bowden cables 324, 324 and are arranged on opposite sides relative to the output shaft 340.
(47) The fifth embodiment shown in FIG. 5A to 5D differs from the fourth embodiment according to FIG. 4A to 4C merely in the design of the actuator. Specifically, the piston-cylinder arrangement 400 according to FIG. 5A to 5D comprises an actuator 434, which provides an arrangement of two Bowden cables 424, 424 on the same side relative to an output shaft 440, instead of the actuator 334, which provides an arrangement of two Bowden cables on opposite sides relative to an output shaft. In FIG. 5A to 5D analogous parts are provided with the same reference numerals as in FIG. 4A to 4C, but increased by the number 100. Therefore the embodiment in FIG. 5A to 5D is described in the following only to the extent to which it differs from the embodiment according to FIG. 1A to 4C, to the description of which reference is hereby otherwise expressly made.
(48) Two components 434a, 434b of the actuator 434 are connected for conjoint rotation to the output shaft 440 which, as already known from the embodiments 200 and 300, has a toothed system.
(49) In the example shown here, the two components 434a, 434b are designed as identical components that are connected to the output shaft 440 in an opposed manner to one another such that each of the components 434a, 434b is engaged with one end fitting 436, 436 in each case, the two Bowden cables 424, 424 extending away from the actuator 434 in opposite directions.
(50) Furthermore, it can be seen from FIG. 5C that the two components 434a, 434b are connected to the output shaft 440 such that the two end fittings 436, 436 are on the same axis B which is parallel to a longitudinal extension direction of the output shaft 440.
(51) The components 434a, 434b can, of course, also be components that are not identical to one another and/or can be connected to the output shaft 440 in a manner different from the manner described above.
(52) In this case, the two components can, for example, be held in a predetermined position on the output shaft 440 by spacers and/or securing elements.
(53) In this embodiment, the coupling device described above can be provided for just one of the components 434a, 434b or for both components 434a, 434b separately or collectively.
(54) The sixth embodiment shown in FIG. 6A to 6C differs from the fifth embodiment according to FIG. 5A to 5D merely in the design of the actuator. Specifically, the piston-cylinder arrangement 500 according to FIG. 6A to 6C has an actuator 534 which is formed integrally, instead of the actuator 434 which comprises a plurality of components. In FIG. 6A to 6C analogous parts are provided with the same reference numerals as in FIG. 5A to 5D, but increased by the number 100. Therefore the embodiment in FIG. 6A to 6C is described in the following only to the extent to which it differs from the embodiment according to FIG. 1A to 5D, to the description of which reference is hereby otherwise expressly made.
(55) The components 434a, 434b known from the piston-cylinder arrangement 400 are combined in the piston-cylinder arrangement 500 to form an actuator 534.
(56) The actuator 534 comprises two hook-shaped elements which are engaged with corresponding end fittings 536, 536.
(57) In the example shown for example in FIG. 6C, the two hook-shaped elements are offset from one another, viewed relative to a longitudinal extension direction of an output shaft 540. The two hook-shaped elements could, of course, also be arranged at the same height relative to the longitudinal extension direction of the output shaft 540.
(58) The seventh embodiment shown in FIG. 7A to 7C differs from the sixth embodiment according to FIG. 6A to 6C merely in the design of the actuator. Specifically, the piston-cylinder arrangement 600 according to FIG. 7A to 7C has an actuator 634 which fundamentally comprises a pinion gear 634a and a rocker 634b, instead of the actuator 534 which is formed integrally. In FIG. 7A to 7C analogous parts are provided with the same reference numerals as in FIG. 6A to 6C, but increased by the number 100. Therefore the embodiment in FIG. 7A to 7C is described in the following only to the extent to which it differs from the embodiment according to FIG. 1A to 6C, to the description of which reference is hereby otherwise expressly made.
(59) The rocker 634b is engaged with two Bowden cables 624, 624, a respective end fitting 636, 636 of the Bowden cables 624, 624 being accommodated in a corresponding hook-shaped recess of the rocker 434b. The rocker 634b is rotatably mounted approximately in the centre between the two hook-shaped recesses. In order to achieve a differing displacement distance of the two Bowden cables 624, 624 during a displacement of the rocker 634b, the rocker can alternatively also be rotatably mounted at a point which is different from the central point between the two hook-shaped recesses.
(60) The pinion gear 634a, which has a toothing system on at least part of its outer circumference, and the rocker 634b, which has a corresponding counter-toothing system in relation to the external toothing of the pinion gear 634a, engage with one another by means of these toothing systems, and so a rotation of the pinion gear 634a brings about an displacement of the rocker 634b.
(61) The basic displacement of the rocker and thus of the cable pulls 638, 638 of the two Bowden cables 624, 624 is comparable with the type of displacement known from the third embodiment according to FIG. 3A to 3C. The effective direction of the actuator 634, i.e. the plane in which the rocker 634b is displaced, deviates, however, by 90 from the effective direction of the actuator 243, i.e. the plane in which the actuator 234 is displaced.
(62) The eighth embodiment shown in FIG. 8A to 8C differs from the seventh embodiment according to FIG. 7A to 7C merely in the design of the actuator. Specifically, the piston-cylinder arrangement 700 according to FIG. 8A to 8C has an actuator 734 which fundamentally comprises one pinion gear 734a and two rockers 734b, 734b, instead of the actuator 634 which comprises one pinion gear 634a and one rocker 634b. In FIG. 8A to 8C analogous parts are provided with the same reference numerals as in FIG. 7A to 7C, but increased by the number 100. Therefore the embodiment in FIG. 8A to 8C is described in the following only to the extent to which it differs from the embodiment according to FIG. 1A to 7C, to the description of which reference is hereby otherwise expressly made.
(63) The piston-cylinder arrangement 700 comprises fundamentally all of the elements of the piston-cylinder arrangement 600, the piston-cylinder arrangement 700 also comprising on the opposite side to the rocker 734b relative to an output shaft 740 a rocker 734b which in turn is connected to two Bowden cables 724, 724.
(64) The pinion gear 734a has a toothing system on at least part of its outer circumference and engages by means thereof with the toothing systems provided on the two rockers 734b, 734b.
(65) Following a rotation of the pinion gear 734a, the rocker 734b, and thus the cable pulls 738, 738 of the Bowden cables 724, 724, is displaced in a manner analogously opposed to the rocker 734b. For the example of a clockwise rotation of the pinion gear 734a, viewed in the direction of the arrow A from FIG. 8A, this means that the two rockers 734b, 734b are displaced such that the two cable pulls 738, 738 are pulled.
(66) The rocker 734b can be mounted in an analogous manner to the mounting of the rocker 634b.
