Device for an actuation handle, actuation handle, and method for wireless transmission of a signal generated by autonomous energy
10767391 ยท 2020-09-08
Assignee
Inventors
Cpc classification
E05B17/22
FIXED CONSTRUCTIONS
E05B47/00
FIXED CONSTRUCTIONS
E05B1/003
FIXED CONSTRUCTIONS
International classification
E05B1/00
FIXED CONSTRUCTIONS
E05B47/00
FIXED CONSTRUCTIONS
E05B17/22
FIXED CONSTRUCTIONS
Abstract
The present disclosure relates to a device for an actuation handle, having an actuation bolt, which has at least one section along its longitudinal axis (A) having at least one outer edge on its circumference. The device comprises a housing having a first receiving section for receiving an energy converter for supplying electrical energy to a radio transmitter by converting mechanical energy into electrical energy, and an aperture for the actuation bolt, wherein the aperture has a second receiving section for rotatably accommodating the section of the actuation bolt having at least one outer edge. The device is characterized in that the first receiving section is disposed such that it is adjacent to the aperture, wherein a switch element of the energy converter extends into a rotational path of the at least one outer edge when the energy converter is in a receiving state, and can be actuated such that it causes a switching by means of the at least one outer edge during a rotation of the actuation bolt.
Claims
1. A device for an actuation handle having an actuation bolt which has at least one section along its longitudinal axis having at least one outer edge on its circumference, the device comprises a housing having a first receiving section for receiving an energy converter for supplying electrical energy to a radio transmitter by converting mechanical energy into electrical energy, and an aperture for the actuation bolt, wherein the aperture has a second receiving section for rotatably accommodating the section of the actuation bolt having at least one outer edge, wherein the first receiving section is adjacent to the aperture, wherein a switch element of the energy converter extends into a rotational path of the at least one outer edge when the energy converter is in a receiving state, and wherein the switch element is configured to be actuated such that it causes a switching by the at least one outer edge during a rotation of the actuation bolt.
2. The device according to claim 1, wherein the housing has a pan section which forms the first receiving section and the aperture with the second receiving section, wherein the aperture has an aperture hole formed in the pan base facing toward the aperture.
3. The device according to claim 2, wherein the housing has a bearing surface for bearing a carrier element supporting at least one radio transmission antenna, wherein the bearing surface covers a section of the pan section encompassing the aperture when bearing on the housing.
4. The device according to claim 1, further comprising an actuation adapter element that is non-rotatably connected to the actuation bolt and is configured to be accommodated in the second receiving section, wherein the actuation adapter element forms the at least one outer edge on the circumference of the actuation bolt.
5. The device according to claim 1, further comprising a position detection device that is configured to be coupled to the energy converter and the radio transmitter, for electrically detecting a position of the actuation handle, wherein the position detection device comprises an encoding element rotatably coupled to the housing and which encompasses the actuation bolt, and an electrically conductive contact element non-rotatably coupled to the actuation bolt, wherein the encoding element is electrically coupled to the energy converter and has at least one electrically conductive contact bridge that is assigned to a position that the actuation handle is configured to assume, wherein the at least one electrically conductive contact bridge is configured to be switched between an open, non-electrically conductive, state and a closed, electrically conductive state through the contact element, wherein contact bridges assigned to different positions are electrically insulated from one another, wherein a contact bridge assigned to a predetermined position of the actuation handle is switched to an electrically conductive setting, or is closed, while other contact bridges are switched to electrically non-conductive settings, or are opened, when the actuation handle assumes the predetermined position.
6. The device according to claim 5, wherein the encoding element has a least one contact section for each of the positions the actuation handle is configured to assume, and has a further collective contact section that is electrically insulated from the a least one contact section and is disposed concentrically around the a least one contact section, wherein the contact sections assigned to the different positions of the actuation handle are insulated from one another, and wherein the contact element has a first contact for establishing an electrically conductive contact to the collective contact section and a second contact coupled in an electrically conductive manner to the first contact for establishing an electrically conductive contact to one of the contact sections assigned to the different positions of the actuation handle.
7. The device according to claim 6, wherein the encoding element is disposed on a printed circuit board, wherein the at least one contact section and the collective contact section are each formed by sliding contact surfaces, and wherein the first and the second contact are formed by a sliding contact finger protruding from the contact element.
8. An actuation handle comprising: a handle piece, the actuation bolt rotatably coupled to the handle piece, and the device according to claim 1.
9. The actuation handle according to claim 8, further comprising an antenna inserted through a hole in the device, wherein the antenna is electrically coupled to the radio transmitter.
10. The device according to claim 1, wherein the device is configured to be attached to a door or window, the device further comprising a signaling system to monitor access to the door or window, wherein the radio transmitter is configured to transmit a radio transmission containing data regarding the access to the door or window, wherein the signaling system comprises a vibration sensor or a sound converter.
11. The device according to claim 1, wherein the switch element is an elastic spring, wherein the at least one outer edge of the actuation bolt is configured to contact the switch element when the actuation bolt is rotated and wherein the switch element does not actuate the energy converter until the at least one outer edge of the actuation bolt reaches a point closes to the energy converter.
12. The device according to claim 1, wherein the energy converter is mono-stable and comprises a magnet, wherein the switch element is a spring, and wherein energy is configured to be generated as the magnet is moved when a spring force of the switch element is greater than a force of the at least one outer edge on the switch element.
13. The device according to claim 1, wherein the energy converter is bi-stable and comprises a reset spring that extends into the rotational path of the at least one outer edge of the actuation bolt, wherein the reset spring is actuated after the switch element is actuated as the actuation bolt rotates and the reset spring remains outside the rotational path until the switch element is actuated again.
14. A method for the wireless transmission of a signal generated in an energy self-sufficient manner by an actuation handle, wherein the actuation handle comprises a rotatable actuation bolt having at least one outer edge extending into the rotational path of a switch element for an energy converter for converting mechanical energy into electrical energy, such that a rotation of the actuation bolt causes a switching actuation of the energy converter by the actuating the switch element by the at least one outer edge, wherein the generated electrical energy supplies a radio transmitter coupled to the energy converter for the wireless transmission of a radio signal, wherein the method comprises: rotating the at least one outer edge from a starting position toward an end position through an actuation position that actuates a switching of the energy converter, generating electrical energy with the energy converter, generating a radio transmission containing data regarding the actuation of the actuation handle, transmitting the radio transmission.
15. The method according to claim 14, wherein the energy converter has a mono-stable or a bi-stable design, further comprising: renewed generation of electrical energy by the energy converter, and repeated transmission of the generated radio transmission.
16. The method according to claim 14, wherein the energy converter has a mono-stable or bi-stable design, further comprising: renewed generation of electrical energy by the energy converter, generation of a new radio transmission containing information regarding the actuation of the actuation handle, and transmitting the new radio transmission.
17. The method according to claim 14, wherein the actuation handle comprises a device having an electric position detection device coupled to the radio transmitter for electrically detecting a position of the actuation handle, wherein the position detection device comprises an encoding element that is non-rotatably coupled to a housing of the device that encompasses the actuation bolt, and an electrically conductive contact element that is non-rotatably coupled to the actuation bolt, wherein the encoding element is electrically coupled to the energy converter and has at least one electrically conductive contact bridge assigned to a position in which the actuation handle is configured to assume, which at least one electrically conductive contact bridge is configured to be switched between an open, electrically non-conductive state, and a closed, electrically conductive state by the electric contact element, wherein contact bridges assigned to different positions are electrically insulated from one another, wherein a contact bridge assigned to a predetermined position of the actuation handle is switched to an electrically conductive state, or is closed, while the other contact bridges are switched to an electrically non-conductive state, or opened, when the actuation handle assumes the predetermined position, further comprising: closing a contact bridge assigned to a position of the actuation handle in order to detect a position of the actuation handle, wherein the data in the radio transmission contains data regarding the position of the actuation handle.
18. The method according to claim 14, wherein the energy converter has a mono-stable or a bi-stable design, wherein the radio transmitter is designed for bi-directional communication with a radio receiver, further comprising: generating a new radio transmission after receiving a radio confirmation from the radio receiver, and transmitting the new radio transmission, renewed generation of electrical energy by the energy converter.
19. The method according to claim 14, wherein the energy converter has a mono-stable or bi-stable design, and wherein the actuation handle comprises an electric energy storage unit, further comprising storing an excess electrical energy in the electric energy storage unit.
20. The method according to claim 14, wherein a polarity of the electrical energy generated by the energy converter is configured to be used to detect an actuation direction of the actuation handle, wherein the radio transmission contains data regarding an actuation direction of the detected actuation.
Description
(1) Various exemplary embodiments and details of the disclosure shall be described in greater detail based on the figures described below. Therein:
(2)
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(10) In the following description of preferred exemplary embodiments of the present disclosure, the same or similar reference symbols shall be used for identical elements, or elements having a similar function, depicted in the various figures, wherein there shall be no detailed repetition of the description of these elements.
(11)
(12) The actuation handle 1 comprises a rosette 8, through which the actuation bolt 2 is inserted, and in relation to which the handle piece 6 can rotate. A rosette for an actuation handle is normally provided for attaching the actuation handle to a window frame or a door. In the illustrated preferred exemplary embodiment, the rosette 8 is connected to a device 10 on the side facing away from the handle piece 6, through which the actuation bolt 2 is likewise inserted.
(13)
(14) The housing 12 has a pan-like section 13 inside the interior space 22 of the pan, between the two attachment holes 20, which is formed by further internal housing walls 26 extending upward from the pan base 24. The pan-like section 13 comprises a first receiving section 14 for receiving an energy converter 30 and an aperture 16 bordering on the first receiving section 14, having a second receiving section 18 for rotatably receiving a section of the actuation bolt 2. An aperture hole 19, bordering on the second receiving section 18, is formed in the pan-like section 13 in the pan base 24, through which the free end of the actuation bolt 2 can be inserted.
(15) The inner housing walls 26 are enclosed by a delimiting, circumferential outer housing wall 28, which is connected to the pan base 24 at the edges. The inner housing walls 26 form a support or bearing for a carrier element 50 at their free, front surface ends 27. The free, front surface end 27 is closer to the pan base 24 than the free front surface end 29 of the outer housing wall 28 aligned therewith. As a result, the carrier element 50 can be accommodated in the pan interior 24.
(16) The carrier element 50 has an outer contour corresponding to the inner contour of the outer housing wall 28, by means of which the carrier element 50 covers the pan interior 24 when it is received in the housing 12. In conjunction with the outer housing wall 28, the pan interior 24 can be protected against external effects.
(17) The carrier element 50 has through-holes 52 corresponding to the attachment holes 20 and the positions assigned to the aperture 18, through which the actuation bolt 2 as well as the attachment means for the rosette 8 can be inserted. The carrier element 50 supports a radio transmission antenna 54, which can be coupled to a radio transmission module for wireless transmission of a radio signal. For this, the carrier element 50 is designed as a printed circuit board. The arrangement of the radio transmission antenna 54 on the carrier element 50 enables a reliable emission of the radio signal, as well as a reliable reception of a corresponding radio signal when the radio transmission module is configured for bidirectional communication. The surface area made available by the carrier element 50 can therefore be exploited in an optimal manner for the radio transmission antenna 54.
(18) The carrier element 50 further comprises an encoding element 60 that can be assigned to a position detection device. The encoding element 60 comprises four circle segment-like sliding contact surfaces 62 disposed in a circle, which are disposed on a side of the carrier element 50 facing away from the housing 12 in the proximity of the through-hole 52 provided for the actuation bolt 2. The four sliding contacts 62 are electrically insulated in relation to one another. The encoding element 60 furthermore has a collective sliding contact 64 disposed concentrically to the four sliding contact surfaces 62, which can be electrically coupled to the energy converter 30 via the carrier element 50. Each of the four sliding contact surfaces 62 forms an electrically conductive contact bridge with the collective sliding contact surface 64. A contact element 70 is provided for an electrical connection of the respective contact bridge, which is non-rotatably disposed on the actuation bolt 2 between the carrier element 50 and the rosette 8. The contact element 70 can likewise be assigned to the position detection device. The contact element 70 is formed by an electrically conductive spring-like contact disk, which covers the four sliding contact surfaces 62 as well as the collective sliding contact surface 64. The contact element 70 has, on the side facing the carrier element 50, eight spring-like sliding contact fingers 74 for establishing an electrically conductive contact to the collective sliding contact surface 64, and two spring-like sliding contact fingers 72 for establishing an electrically conductive contact to one of the four sliding contact surfaces 62 respectively, depending on a rotational position of the actuation bolt 2, or the handle piece 6. As a result, a reliable electrically conductive contact between the encoding element 60 and the contact element 70 can be ensured.
(19) Depending on a rotational position of the actuation handle 1, the two sliding contact fingers 72 establish an electrically conductive contact with one of the four sliding contact surfaces 62, while the eight sliding contact fingers 74 establish an electrically conductive contact to the collective sliding contact surface 64. As a result, an electrically conductive connection is produced between one of the four sliding contact surfaces 62 and the collective sliding contact surface 64, when current flows through it as the result of a generation of an electrical energy by the energy converter 62. By assigning the four sliding contact surfaces 62 to respective functional positions, or positions of the actuation handle 1, respectively, a position of the actuation handle 1 can be reliably detected, and transmitted by means of the radio transmission module. Further sliding contact surfaces and corresponding sliding contact fingers that can be assigned thereto for a reliable detection of the position of the actuation handle 1 are conceivable.
(20) As is furthermore shown in
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(22) As is furthermore shown in
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(24) The energy converter 30 is an induction generator known from DE 10 2011 078 932 A1, having a switch element 32, which is coupled to a coil assembly 34 and a magnet assembly 36 such that the magnet assembly 36 can be moved toward the coil assembly 34 by actuating the switch element 32. The switch element 32 is designed as a leaf spring mechanism. The leaf spring mechanism is configured to first store the mechanical energy transmitted during actuation from the actuation bolt 2 via the outer edge 4, or the mechanical energy transmitted from the actuation adapter element 40 shown in
(25) The coil assembly 34 comprises a U-shaped soft magnetic coil core, the respective legs of which are encompassed in an induction coil. The magnet assembly 36 is disposed such that it can be moved linearly on the free ends of the coil core legs, and comprises an E-shaped magnetizable pole shoe assembly, wherein the outer legs of the E-shaped pole shoe assembly are magnetically connected to a magnetic pole of a permanent magnet bordered by the E-shaped pole shoe assembly, and the middle leg of the E-shaped pole shoe assembly is magnetically connected to the other magnetic pole of the permanent magnet. The free leg ends of the E-shaped pole shoe assembly are magnetically coupled to the free leg ends of the coil assembly 34 via a magnetizable sliding plate disposed between the pole shoe assembly and the coil assembly 34. In a first movement end position of the magnet assembly 36, a free end of one of the outer legs of the pole shoe assembly lies opposite a free leg end of the coil assembly 34, and the free end of the middle leg of the pole shoe assembly lies opposite the other free leg end of the coil assembly 34, in each case with the collective sliding plate placed therebetween. In this first movement end position, a magnetic flux having a first direction is generated in the coil assembly 34. In the second movement end position of the magnet assembly 36, the free end of the other outer leg of the pole shoe assembly lies opposite a free leg end of the coil assembly 34, and the free end of the middle leg of the pole shoe assembly lies opposite the other free leg end of the coil assembly 34, in each case with the collective sliding plate placed therebetween. In this second movement end position, a magnetic flux having a second direction is generated in the coil assembly 34, which direction is opposite the first direction. The magnetic flux direction reversal is caused by a movement of the magnet assembly 36 from the first movement end position into the second movement end position, or vice versa, by means of which a corresponding induction voltage is induced in the respective induction coils.
(26) The energy converter 30 has electrical contacts 37 on the side of the coil assembly 34 facing away from the magnet assembly 36, which are electrically connected to another printed circuit board 38 by means of plug-in contacts. The other printed circuit board 38 is electrically coupled to the carrier element 50. In this preferred exemplary embodiment, the other printed circuit board 38 is configured to commutate the individual induction coils of the coil assembly 34. In accordance with another preferred exemplary embodiment, the other printed circuit board 38 carries some or all of the components of the radio electronics and/or the at least one logic module.
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(28) The actuation bolt 2 is shown in a movement state between two functional positions of the actuation handle 1, wherein the actuation bolt 2 is moved by means of pivoting the handle piece 6 along a rotational direction B in the counterclockwise direction when looking toward the end of the plane of the sheet. The actuation bolt 2 comes in contact with the switch element with one of its outer edges 4. If the actuation bolt 2 is rotated further along the rotational direction B, a pressure force transmitted by the outer edge 4 acts on the switch element 32, which is pushed further toward the coil assembly 34 as a result of its elastic spring design, without the magnet assembly 36 moving. The outer edge 4 approaches the actuation bolt 2 during the rotational movement in a continuous manner, until it reaches a point closest to the coil assembly 34, which the outer edge 4 moves away from when the actuation bolt 2 is rotated further along the rotational direction B of the coil assembly 34 shown herein. The magnet assembly 36 is still retained in its first movement end position due to the magnetic self-retaining forces acting between the magnet assembly 36 and the coil assembly 34. The mechanical force in the form of a pressure force acting on the switch element 32 is first stored during the rotational movement of the actuation bolt 2. As soon as the amount of the stored energy exceeds the amount of magnetic self-retaining force as a result of further rotating the actuation bolt 2, or the outer edge 4 approaching the coil assembly 34, the magnet assembly 36 is moved abruptly, along a movement direction C, from the illustrated first movement end position into the second movement end position. The abrupt movement of the magnet assembly 36 preferably occurs before, or alternatively, preferably at the latest, when the outer edge 4 reaches the point that is spatially closest to the coil assembly 34. The actuation bolt 2 is in an actuation end position thereby. This movement causes a magnetic flux direction reversal in the coil assembly 34, by means of which a voltage in the induction coils is induced. The electric energy generated thereby is transmitted via the plug-in contacts 37. As soon as the actuation bolt 2 is rotated in the clockwise direction, opposite to the rotational direction B, a similar actuation of the switch element 32 occurs.
(29) According to a preferred exemplary embodiment, the energy converter 30 is mono-stable, and in other words, is thus self-resetting. For this, the switch element 32 is preferably configured such that it is in a relaxed state when the magnet assembly 36 is in the first movement end position, and is in an elastic tensioned state when it is in the second movement end position. As soon as the amount of pressure force acting on the switch element 32 by the outer edge 4 as a result of further rotation of the actuation bolt 2 is lower than the amount of self-resetting spring force of the switch element 32, and at the same time, the amount of self-resetting force is greater than the amount of magnetic self-retaining force, the magnet assembly 36 is moved abruptly back from the second movement end position into the first movement end position, by means of which a renewed induction voltage is generated.
(30) According to an alternative preferred exemplary embodiment, the energy converter 30 is bi-stable. For this, a reset spring device that resets the magnet assembly 36 is provided, which has an actuatable end, which can be brought into the rotational path of the outer edge 4 after actuation of the switch element 32, such that it can be actuated for switching, and after actuation, remains outside of the rotational path of the outer edge 4 until the switch element 32 is actuated again. The actuatable end of the reset spring device can be disposed upstream or downstream of the switch element 32 in the rotational direction of the actuation bolt 2, or the outer edge 4, such that it can be brought into the rotational path of the outer edge 4. Thus, depending on a use oriented configuration of the actuation handle 1, a double actuation can occur, in order to obtain a high energy gain, or a single actuation of the energy converter 30 can occur during a rotation of the actuation bolt 2, or while the actuation handle 1 is being brought into a functional position from another functional position.
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(33) According to another preferred exemplary embodiment of the method 1000, the energy converter 30 has a mono-stable or bi-stable design, wherein the rotating step 1100 furthermore exhibits sub-steps following the sub-step for transmission 1130 in the sequence, for the renewed generation 1140 of an electrical energy by means of the energy converter 30, and the repeated transmission 1150 of the generated radio transmission telegram. As a result, a transmission reliability can be increased.
(34) According to another alternative preferred exemplary embodiment of the method 1000, the rotating step 1100 furthermore contains sub-steps following the sub-step for transmitting 1130 in the sequence, for generating a new radio transmission telegram 1160 containing data regarding the action of the actuation handle 1 and the transmission 1170 of the new radio transmission telegram, wherein a sub-step for the renewed generation 1140; 1165 of an electrical energy by means of the energy converter can be disposed upstream of the sub-step for the generation 1160 of a new radio transmission telegram, or it can be provided between the sub-step for the generation 1160 of a new radio transmission telegram and the sub-step for the transmission 1170 of the new radio transmission telegram. This can be selected, as needed, depending on the energy consumption of the sub-steps for generating the radio transmission telegram and the new radio transmission telegram, or other aspects relating to energy.
(35) According to another preferred exemplary embodiment of the method 1000, the actuation handle has an electrical position detection device for electrically detecting a position of the actuation handle coupled to the radio transmission module. The actuation handle that has the position detection device can be, for example, one of the actuation handles 1 described above. With the method according to this preferred exemplary embodiment, the rotating step 110 comprises a sub-step for closing 1105; 1115 a contact bridge assigned to a position of the actuation handle 1, disposed upstream of the sub-step for generating 1120 a radio transmission telegram, in order to detect the position of the actuation handle 1, wherein the data in the radio transmission telegram contains data regarding the position of the actuation handle 1. In this case, the closing step 1105; 1115 can already be disposed upstream of the sub-step for generating 1120 a radio transmission telegram, or it can be disposed between the sub-step for generating 1110 electrical energy, and the sub-step for generating 1120 a radio transmission telegram. Thus, in addition to data regarding the actuation of the actuation handle 1, data regarding the detected position of the actuation handle 1 can simultaneously be transmitted in a wireless manner. A status monitoring of the actuation handle can be simplified by this means.
(36) According to another preferred exemplary embodiment of the method 1000, the actuation handle comprises, in addition to a mono-stable or bi-stable energy converter, an electrical energy storage unit, e.g. a capacitor, wherein the rotating step 1100 exhibits a sub-step for the storage 1124 of an excess electrical energy provided between the sub-step for generating 1120 a radio transmission telegram and the sub-step for transmitting 1130 the radio transmission telegram, and a sub-step following this sub-step for the renewed generation 1126 of an electrical energy by means of the energy converter. This preferred method contains the advantage of a higher energy availability, by means of which radio protocols requiring more energy can be reliably transmitted.
(37) According to another preferred exemplary embodiment of the method 1000, the actuation handle has a radio transmission module for bi-directional communication with a radio receiver module.
(38) Other sub-steps can certainly be provided between the individual sub-steps of the preferred method 1000 described above. By way of example, according to another preferred exemplary embodiment of the method for an actuation handle having a position detection device, a sub-step for querying a position of the actuation handle by means of an electronic logic module can be disposed downstream of the sub-step for generating an electrical energy, disposed upstream of sub-steps forming a (renewed) generating of a (new) radio transmission telegram. Alternatively, individual sub-step can follow one another directly, in other words, without further sub-steps. Furthermore, in the sub-step for transmitting a radio transmission telegram, a single or a repeated transmission of the radio transmission telegram can occur. This applies equally to the sub-steps for the renewed transmission of the radio transmission telegram or the transmission of a new radio transmission telegram. As a result, a transmission reliability can be further improved.
(39) The exemplary embodiments described herein and illustrated in the figures are selected only by way of example. The dimensions of the geometric shape of the elements described herein are only exemplary, and can be adjusted accordingly.
REFERENCE SYMBOLS
(40) 1 actuation handle 2 actuation bolt 4, 44 outer edge 6 handle piece 8 rosette 9 rosette attachment pins 10 detection device 11 hole 12 housing 13 pan-like section 14 first receiving section 15 attachment pins 16 aperture 18 second receiving section 19 aperture hole 20 attachment hole 22 pan interior 24 pan base 26 inner housing wall 27 front surface end of the inner housing 28 outer housing wall 29 front surface end of the outer housing 30 energy converter 32 switch element 34 coil assembly 36 magnet assembly 37 plug-in contact 38 further printed circuit board 40 actuation adapter element 50 carrier element 52 passage 54 radio transmission antenna 60 encoding clement 62 sliding contact surface 64 collective sliding contact surface 70 contact element 72, 74 sliding contact finger 80 outer antenna element 1000 method for the wireless transmission of a signal generated in an energy self-sufficient manner 1100 rotating step 1105, 1115 sub-step for closing a contact bridge 1110 sub-step for generating an electrical energy 1120 sub-step for generating a radio transmission telegram 1124 sub-step for storing an electrical energy 1126, 1133, 1135, 1140, 1164 sub-step for the renewed generation of an electrical energy 1130 sub-step for transmitting a radio transmission telegram 1131 sub-step for switching the radio transmission module to the receiver mode 1132 sub-step for receiving a radio confirmation telegram 1134, 1160 sub-step for generating a new radio transmission telegram 1136, 1170 sub-step for the renewed transmission of the radio transmission telegram A longitudinal axis B rotation direction C movement direction of the magnet assembly