Pipette for activating a syringe

Abstract

A pipette for actuating a syringe including a strip-shaped housing with first and second receptacles for inserting fastening sections. First and second releasable holding mechanism for holding the fastening sections. First and second displacing mechanisms to displace a receiving body in the housing from the receptacles. A toothed rack and a pawl are connected to an actuation rack. A cover has a coupling element and longitudinal slot and spring.

Claims

1. A pipette for actuating a syringe, comprising: a strip-shaped housing (2), a first receptacle (20) with a first opening (21) at the bottom end of the housing (2) for inserting a first fastening section (16) at the top edge of a cylinder (11) of the syringe (3), a receiving body with a second receptacle (24) and a second opening (26) at the bottom end in the housing (2) for inserting a second fastening section (19) on a plunger (12) of the syringe (3), a first holding mechanism for releasably holding (23) the first fastening section (16) in the first receptacle (20), a second holding mechanism for releasably holding (27) the second fastening section (19) in the second receptacle (24), a first displacing mechanism for displacing (5) the receiving body (25) in the housing (2) away from the first receptacle (20), a second displacing mechanism for displacing (28, 36, 39) the receiving body (25) toward the first receptacle (20) in steps by an increment corresponding to the liquid volume to be ejected by the syringe (3) in the steps, an actuation element (36) which can be actuated outside of the housing (2) for executing individual steps, a toothed rack (28) with teeth (29) arranged in the housing (2) and connected to the receiving body (25), a pawl (39) pivotably mounted in the housing (2) on the actuation element (36) which engages with the teeth (29) of the toothed rack (28) and entrains the toothed rack when the actuation element (36) is displaced downward, and disengages with the teeth (29) when the actuation element (36) is displaced upward, an adjustable adjusting element (10) for adjusting the increment of the steps that can be adjusted outside of the housing (2), a cover (41) displaceably arranged on the toothed rack (28) on the side of the pawl (29) with a holding surface (71) facing the pawl (39), for holding the pawl (39) from engaging in the teeth (29), and a catching edge (70) at the bottom end, below which the teeth (29) are exposed for engagement by the pawl (39), a coupling element (68) arranged on the cover (41) that is coupled to the adjusting element (10) to transfer an adjustment of the adjusting element (10) to the cover (41), wherein the cover has a first cover part (42) consisting of plastic that comprises the coupling element (68) and a longitudinal slot (61), and a second cover part (43), consisting of sheet metal held on a bottom cover part (42), that comprises a bend (49) arranged in the longitudinal slot (61) and an associated leaf spring (53), the catching edge (70) is formed on the first cover part (42), the toothed rack on the side facing the cover has a projecting cam (80) that contacts the bend (49) in the longitudinal slot (61) at the end of the displacement of the receiving body (25) toward the first receptacle (20), whereby the leaf spring (53) is deflected, and the pawl (39) is held by the leaf spring (53) from further engagement in the teeth (29) of the toothed rack (28), and with the exception of a section comprising at least the bend (49) and leaf spring (53), the second cover part (43) is overmolded by the plastic of the first cover part (42) in a specific position of the bend (49) with respect to the coupling element (68) which securely connects the first cover part (42) and second cover part (43) to each other.

2. The pipette according to claim 1, wherein a head section (44) of the second cover part (43) is overmolded by the plastic of the first cover part (42) adjacent to a top slot section (62) of the longitudinal slot (61) on the side facing the toothed rack (28) on the edge, and the head section (44) is connected at the bottom end to the bend (49) that is arranged in a bottom slot section (63) of the longitudinal slot (61), next to which the second cover part (43) is not overmolded with the plastic of the first cover part (42), so that the cam (80) in the longitudinal slot (61) can slide along the head section (44) before it contacts the bend (49).

3. The pipette according to claim 2, wherein the second cover part (43) has a first strip-shaped section (48) that is connected to the bottom end of the head section (44) and is connected at the bottom end to the bend (49), and is arranged in the bottom slot section (63).

4. The pipette according to claim 2, wherein the second cover part (43) has a second strip-shaped section (50) connected to the bottom end of the bend (49) that is arranged in the bottom slot section (63) and on which the cam (80) can slide after passing the bend (49).

5. The pipette according to claim 1, wherein a connecting section (51) is connected to a longitudinal side edge of the first or second strip-shaped section (48, 50), extends through a recess (69) in the top side of the first cover part (42) to the longitudinal side edge of the first cover part (42), and is connected to the downwardly extending leaf spring (53) across a deflection (52) parallel to the longitudinal side of the first cover part (42).

6. The pipette according to claim 1, wherein the second cover part (43) is produced as a single part from sheet metal.

7. The pipette according to claim 1, wherein the second cover part (43) is covered by webs (64-67) of the first cover part (42) extending transversely to the toothed rack (28) on the side of the first cover part (42) facing away from the toothed rack (28).

8. The pipette according to claim 7, wherein a web (65) bears the coupling element (68).

9. The pipette according to claim 1, wherein the bottom end of the first cover part (42) has the catching edge (70).

10. The pipette according to claim 9, wherein the first cover part (42) has a wall thickness that gradually decreases toward the bottom end.

11. The pipette according to claim 9, wherein the first cover part (42) has a bevel (72) toward the bottom end on the side facing away from the toothed rack (28).

12. The pipette according to claim 1, wherein the first cover part (42) at the engagement edge has a maximum wall thickness of 0.5 mm and preferably 0.2 to 0.4 mm.

13. The pipette according to claim 1, wherein the first cover part (42) on the side facing the toothed rack (28) has a flat contact surface against which the toothed rack (28) can rest and in which the longitudinal slot (61) is arranged.

14. The pipette according to claim 1, wherein the first cover part (42) has the shape of an elongated hollow body with two parallel, strip-shaped side parts (54, 55) and a base (56) that delimits a channel (57), wherein the longitudinal slot (61) is formed in the base (56), and the second cover part (43) in the base (56) is overmolded by plastic from the first cover part (42).

15. The pipette according to claim 1, wherein the first cover part (42) has laterally projecting wings (74, 75) on the two longitudinal sides.

16. The pipette according to claim 1, wherein the toothed rack (28) is injection molded as a single part from plastic with the cam (80).

17. The pipette according to claim 1, wherein the cam (80) is arranged on the toothed rack (28) so as to be adjustable in an axial direction.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is explained in greater detail below based on included drawings of an exemplary embodiment. In the drawings:

(2) FIG. 1 shows a pipette according to the invention with a syringe held therein in a perspective view from the side;

(3) FIG. 2 shows the same pipette in a longitudinal section;

(4) FIG. 3 shows the same pipette when the front housing half is removed in a perspective view diagonally from the front and from the side;

(5) FIG. 4 shows a top frame part with components of the same pipette arranged therein when the housing is removed in an enlarged perspective view;

(6) FIG. 5 shows the same arrangement in a longitudinal section;

(7) FIG. 6 shows the toothed rack with an actuation element, pawl and cover of the same pipette in another enlarged perspective view;

(8) FIG. 7 shows the cover in a perspective view;

(9) FIG. 8 shows a second cover part in an enlarged perspective view;

(10) FIG. 9 shows the selection wheel in a view from below;

(11) FIG. 10 shows the pipette while actuating the actuation element before the engagement of the pawl in the teeth in a longitudinal section;

(12) FIG. 11 shows the pipette in the same situation in an enlarged detailed view;

(13) FIG. 12 shows a longitudinal section of the pipette when the pawl is optimally engaged in the teeth;

(14) FIG. 13 shows the pipette in the same situation in an enlarged detailed view; and

(15) FIG. 14 shows an alternative toothed rack in a top frame part with the actuation element, pawl and cover in a longitudinal section.

DETAILED DESCRIPTION OF THE INVENTION

(16) According to FIG. 1, a pipette 1 has a rod-shaped housing 2 in which a syringe 3 is held at the bottom. A drawing lever 5 projects from the housing 2 from a sidewall of the housing 2 over a straight slot 4. A control knob 8 of a toothed rack and pawl control projects from the same side wall of the housing 2 above two additional slots 6, 7. Above that, a display apparatus in the form of a display 9 is recessed in the same side wall of the housing 2. Segments of a selection wheel 10 project from openings in the adjacent sidewall.

(17) According to FIG. 2, the syringe 3 has a cylinder 11 and a plunger 12 movably arranged therein. The cylinder 11 has a conical section 13 at the bottom with a hole 14 for the passage of liquids, and a cylindrical section 15 above that in which the plunger 12 can be displaced. At the top, the cylinder 11 has a first fastening section 16 with a peripheral flange 17. From the plunger 12, a plunger rod 18 projects upward and has a second fastening section 19 with several peripheral beads.

(18) The syringe 3 is arranged with the flange 17 in a first receptacle 20 on the bottom end of the housing 2 that has an axially directed first opening 21 in the bottom end of the housing 2 for inserting and removing the syringe 3. The syringe 3 presses with its top side against a pressure sensitive ring sensor 22 that senses the projections on the top edge of the flange 17. The code indicated on the flange 17 denotes the size of the respective syringe 3. The flange 17 is held in the housing 2 in this position by releasably holding first means in the form of first grip levers 23.

(19) The second fastening section 19 of the plunger 12 is arranged in a second receptacle 24 in a hollow cylindrical receiving body 25. This has an axially directed second opening 26 for inserting the second fastening section 19. The second fastening section 19 is held by releasably holding second means in the form of second grip levers 27 that engage between the beads of the second fastening section 19 or clamp them.

(20) The receiving body 25 is securely connected to a toothed rack 28 with teeth 29 that extend below the slot 4 in the longitudinal direction of the housing 2.

(21) A drawing lever holder 30 is fixed to the receiving body 25 and a bottom part of the toothed rack 28.

(22) Furthermore, there is a drawing lever support 31 with a slide plate 32 that lies against the bottom side of the edges of the slot 4. The drawing lever support 31 has a post 33 that projects upward and penetrates the slot 4. The drawing lever 5 is fixed to the post 33 outside of the housing 2.

(23) At the end of the displacement of the receiving body 25 toward the first receptacle 20, the plate 32 contacts the bottom edge of the slot 4 which comprises a bottom stop.

(24) In the upper half of the housing 2, an actuation element in the form of a metering lever 36 is pivotably mounted in a pivot bearing 34 in a bulge 35 in the side wall of the housing 2 opposite the slot 4. According to FIGS. 3 to 6, the metering lever 36 has two legs 37, 38 at a distance from each other that extend on the opposite side wall of the housing 2 out of the two slots 6, 7. At that location, the control knob 8 is fixed on the projecting ends of the legs 37, 38.

(25) At the end of the displacement of the receiving body 25 upward away from the first receptacle 20, the drawing lever support 31 contacts a bearing body securely arranged in the housing 2 in which the pivot bearing 34 is formed for the metering lever 36. This comprises the top stop for the displacement of the receiving body 25.

(26) A pawl 39 is pivotably mounted between the two legs 37, 38 of the metering lever 36. The pawl 39 is arranged with several pawl teeth 40 (three in the example) above the teeth 29 of the toothed rack 28. The metering lever 36 is pressed by a spring apparatus into the position in FIG. 2. The metering lever 36 can be swung downward by actuating the control knob 8 counter to the effect of the spring apparatus. The pawl 39 is pressed into the teeth 29 of the toothed rack 28 by means of another spring apparatus. This advances the toothed rack 28 downwards.

(27) A movable cover 41 is arranged between the pawl 39 and toothed rack 28. The cover 41 is displaceable by turning the selection wheel 10 projecting out of the side of housing 2 so that the teeth 29 of the toothed rack 28 are more or less covered. While actuating the control knob 8, the pawl is first pressed against the cover 41 and then falls downward into the teeth 29. The extent to which the toothed rack 28 is displaced while swinging the metering lever 36 downward, therefore, depends on the position of the cover 41 relative to the teeth 29.

(28) According to FIG. 7, the cover 41 consists of a first cover part 42 made of plastic and a second cover part 43 made of thin sheet metal which is partially embedded in the plastic of the first cover part 42 by being overmolded.

(29) According to FIG. 8, the second cover part 43 has a head section 44 that has the shape of a wide strip in the example. At the bottom on the two longitudinal sides, the head section 44 has opposing notches 45, 46 that serve to anchor the first cover part 42 in the plastic. Below this, the head section 44 has a tapering 47.

(30) The bottom end of the tapering 47 is connected to a first strip-shaped section 48. The first strip-shaped section 48 is connected by a contrary bend 49 to a second strip-shaped section 50. The head section 44, the first strip-shaped section 48 and the second strip-shaped section 50 have a common longitudinal axis.

(31) In the top part, the second strip-shaped section 50 is connected on a longitudinal side to a strip-shaped connecting section 51 that projects perpendicular to the second strip-shaped section 50. The connecting section 51 is connected by a deflection 52 to a leaf spring 53.

(32) The second cover part 43 is produced as a single part from a thin piece of sheet metal. The sheet metal is preferably resilient material, in particular spring steel.

(33) According to FIG. 7, the first cover part 42 generally has the shape of an elongated hollow body with a U cross section. It has two parallel, strip-shaped side parts 54, 55 and a base 56 that bridges them. The side parts 54, 55 and the base 56 have flat contact surfaces on the inside for guiding the toothed rack 28.

(34) The side parts 54, 55 and base 56 delimit a channel 57.

(35) A top base part 58 has a greater wall thickness than a bottom base part 59 of the base 56. The top and bottom base part 58, 59 are connected to each other by a ramp 60 so that there is a smooth transition between the outer sides.

(36) A longitudinal slot 61 extends in the middle of the base 56. The longitudinal slot 61 extends over the entire top base part 57 and terminates shortly before the bottom end of the bottom base part 59.

(37) In the region of the top base part 58, a top slot section 62 of the longitudinal slot 61 is covered on the side by the head section 44.

(38) A bottom slot section 63 of the longitudinal slot 61 extends in the bottom base part 59 and is wider than the first and second strip-shaped sections 48, 50 and the bend 49 which are arranged within, or respectively slightly before the slot section 63. Accordingly, a gap is on both sides of the first and second strip-shaped section, 48, 50 as well as the bend 49 and the bottom slot section 63.

(39) The head section 44 is overmolded within the top base part at the edge by the plastic of the first cover part 42. On the side facing away from the toothed rack 28, the width of the edge-side edging of plastic is smaller than on the side of the head section 44 facing the toothed rack 28, wherein the edge-side edging defines the top slot section 62. Notches 45, 46 are anchored in the top base part 58. This fixes the second cover part 43 to the first cover part 42.

(40) The sections of the second cover part 43 below the head section 44 are not overmolded and therefore are elastically extendable relative to the first cover part 42. For this purpose, the tapering 47, or respectively the first strip-shaped section 48, extend out of the ramp 60.

(41) On the outside, the head section is bridged by webs 64 to 67 that extend perpendicular to the head section 44.

(42) A coupling element 68 in the form of a pin extends from the web 65 and is injection molded as a single part with the first cover part 42.

(43) In the outside, the first cover part 42 has a recess 69 that extends from the bottom slot section 63 to the side edge of the side part 54. The connecting section 51 extends to the side through this recess 69 so that the leaf spring 53 runs at a short distance from the first cover part 42.

(44) The first cover part 42 has a catching edge 70 on the bottom end. This is formed on the bottom end of the bottom base part 59. At that location, the bottom base part 59 has a maximum wall thickness of 5 mm, and preferably 4 mm or less.

(45) The outer side surface of the bottom base part 59 is a holding surface 71 for the pawl 39. The bottom base part has a bevel 72 at the bottom on the outer side. On the top end of the bevel 72, the bottom base part 59 has a wall thickness of 5 mm or more.

(46) The catching edge 70 is interrupted by a short space 73 extending like a slot in the axial direction.

(47) Strip-shaped wings 74, 75 project perpendicular from the outside of the side parts 54, 55.

(48) The cover 41 is produced by inserting the second cover part 43 into an injection mold so that the bend 49 lies against a specific contact surface. Then the mold is closed, and the first cover part 42 is injection molded. The finished cover is distinguished in that the bend 49, pin 68 and catching edge 70 assume specific positions with adequate tolerances.

(49) According to FIGS. 2 to 7, the toothed rack 28 extends through the channel 57 of the first cover part 42. The pawl 39 is threaded onto the leaf spring 53 of the second cover part 43 through a guide slot 76 on the bottom end. The cover 41 is movably guided in the housing 2 along the wings 74, 75 in the longitudinal direction.

(50) By rotating the selection wheel 10, the cover 41 can be displaced in the longitudinal direction. For this purpose, the selection wheel 10 according to FIG. 9 has a central bearing hole 77 and a spiral guide curve 78. The selection wheel 10 is rotatably mounted by the bearing hole 77 on a shaft on the housing 2, and the pin 68 of the cover 41 engages in the guide curve 78. Consequently, when the selection wheel 10 is rotated, the cover 41 is displaced along its guide in the housing 2.

(51) The selection wheel 10 is assigned another sensor 79 that detects the rotary position of the selection wheel 10.

(52) According to FIG. 5, a cam 80 is permanently molded onto the top end of the toothed rack 28 at a specific position.

(53) When the toothed rack 28 is displaced downward, the cam 80 is moved through the longitudinal slot 61 in the cover 41, and extends out of the top slot section 62 into the bottom slot section 63. Finally, the cam 80 contacts the projecting bend 49 and presses it forward together with the leaf spring 53 (upward in FIG. 6). The pawl 39 guided on the leaf spring 53 is thereby lifted out of the teeth 29 and a remaining travel block is realized.

(54) In addition to the toothed rack 28, a transmission element 81 is arranged in the pipette housing to control reverse travel. The transmission element 81 has a strip-shaped transmission section 82 that is guided and displaceable parallel to the toothed rack 28 in the housing 2 of the pipette.

(55) The strip-shaped transmission section 82 has a bottom transmission element end 83 that is located in the displacement region of a bottom stop 84 projecting from the side of the toothed rack 28 when the transmission element 82 is displaced downward.

(56) Two control arms 85, 86 are connected to the top end of the strip-shaped transmission section 82 which are arranged parallel to each other in a plane perpendicular to the plane of the drawing.

(57) The transmission element 81 is displaceable such that the top ends of the control arms 85, 86 reach the displacement region of beveled stop edges on the legs 37, 38 (see FIG. 2).

(58) The transmission element 81 and the components interacting therewith are preferably designed as described in European application 120 02 849.3-2113 and U.S. Ser. No. 13/867,800, the content of which is hereby incorporated in the present application.

(59) Furthermore, a printed circuit board 87 with electronics 88 is arranged in the upper half of the housing 2. An electrical voltage supply in the form of at least one battery 89 (such as a button cell) or a rechargeable battery 89 is also located there. The electronics 88 with the ring sensor 22 is wired to the other sensor 79 for detecting the rotary position of the selection wheel 10 and the display 9. Furthermore, the electronics 88 are connected to the battery 89.

(60) The electronics 88 determine the respective syringe size from the measurement signals supplied by the ring sensor 22, and the respective increment from the setting of the selection wheel 10. From this, they calculate the set dispensing volume and present it on the display 9.

(61) When using the pipette 1, first a syringe 3 with a syringe size selected by the user is releasably connected to the pipette 1 by inserting it with the first fastening section 16 in the receptacle 20, and with the second fastening section 19 in the receptacle 24, so that the flange 17 is gripped by the first grip levers 23, and the fastening section 19 is gripped by the second grip levers 27. This situation is shown in FIG. 2.

(62) The ring sensor 22 senses the code on the flange 17 of the syringe 3. With the signals provided by the ring sensor 22, the electronics 88 discern that a syringe 3 has been inserted and turn on the display 9. With the signals provided by the ring sensor 22 and by the other sensor 79, the electronics 88 determine the set dispensing volume and present it on the display 9. The user may change the setting of the dispensing volume using the selection wheel 10, and the changed metering volume is shown on the display 9.

(63) To draw liquid through the hole 14 in the syringe 3, the drawing lever 5 is pressed upward out of the position in FIG. 2.

(64) At the end of the drawing movement, the bottom stop 84 entrains the transmission element 81.

(65) Before the set metering volume can be discharged step-by-step, reverse travel must occur. This is done by actuating the control knob 8. In so doing, the legs 37, 38 contact the control arms 85, 86 and displace the transmission element 81 downward. The transmission element 81 entrains the toothed rack 28 by the bottom stop 84. With this reverse travel, the slack is removed from the system.

(66) Then the drawn amount of liquid can be discharged in small steps by pressing the control knob 8 downward repeatedly against the effect of the spring apparatus. In so doing, the other spring apparatus presses the pawl 39 with the pawl teeth 40 against the holding surface 71 of the cover 41 until the pawl teeth 40 reach the bottom end of the holding surface 71. This situation is shown in FIGS. 10 and 11.

(67) After passing the catching edge 70, the pawl 39 with the pawl teeth 40 falls into the teeth 29 of the toothed rack 28 and entrains the toothed rack 28 downward somewhat as the metering lever 36 continues to swing downward. This situation is shown in FIGS. 12 and 13. Given the precise position of the pin 68 and catching edge 70, the pawl teeth 40 fall precisely into the teeth 29. The displacement of the toothed rack 28 each time the metering lever 36 swings until a bottom stop is reached depends on a position of the cover 41 set by the selection wheel 10. After the control knob 8 is released, it is pressed upward by the spring apparatus, and another metering step can be executed.

(68) Dispensing without refilling the syringe 3 can occur until the remaining amount of liquid in the syringe 3 is less than the set metered quantity. Then the remaining travel block ensures that the pawl teeth 40 can no longer fall into the teeth 29 in that the cam 80 actuates the leaf spring 53 which swings the pawl 39 away from the toothed rack 28.

(69) Given the precise position of the cam 80 on the toothed rack 28, the pawl 39 is held by engaging in the toothed rack 28 when a complete metering step is no longer possible.

(70) The remaining liquid in the syringe 3 can be discharged downward by displacing the drawing lever 5. Then the syringe 3 can be disconnected from the pipette 1. To do this, the user actuates the first grip levers 23 which act by means of projections on the inside on the second grip levers 27 as described in EP 0 656 229 B1 and U.S. Pat. No. 5,620,660.

(71) Preferably, instead of grip levers 23, 27 that can be manually actuated directly, a pipette according to the invention has first and second means, for releasably holding the syringe, which are designed as described in EP 2 033 712 A1 and US 2009/139351 A1, the content of which is hereby incorporated in the present application. With the pipette according to the aforementioned documents, the syringe is disconnected from the pipette after being drained by an additional actuation of the metering lever. For this purpose, the pipette has a gearing that is controlled by the metering lever and acts on the first and second means for holding the syringe to disconnect the syringe from the pipette. According to an embodiment of this pipette, the first and second means for releasably holding are designed as the grip levers that are integrated in the housing and cannot be directly actuated from the outside.

(72) According to FIGS. 12 and 13, the pawl 39 optimally falls into the teeth, i.e., each pawl tooth 40 engages precisely in one trough between two teeth of the teeth 29.

(73) FIG. 14 shows a pipette with an alternatively designed toothed rack 28.

(74) With this toothed rack 28, the cam 80 projects to the outside out of an additional longitudinal slot 90 in the toothed rack 28. The cam 80 has an axial hole 91 under the additional longitudinal slot 90. An adjustment screw 92 is screwed through the axial hole 91 into an adjustment thread 93 on the top end of the toothed rack 28. A helical spring 94 is guided on the adjustment screw 92, and one end abuts the screw head of the adjustment screw 92, and the other end abuts the top end of the toothed rack 28 in order to hold the cam 80 against the screw head.

(75) By turning the adjustment screw 92, the position of the cam 80 can be changed in the longitudinal direction of the toothed rack 28. This makes it possible to adjust the remaining travel block should this be necessary for whatever reason.

REFERENCE NUMBER LIST

(76) 1 Pipette 2 Housing 3 Syringe 4 Slot 5 Drawing lever 6 Slot 7 Slot 8 Control knob 9 Display 10 Selection wheel 11 Cylinder 12 Plunger 13 Conical section 14 Hole 15 Cylindrical section 16 First fastening section 17 Flange 18 Plunger rod 19 Second fastening section 20 First receptacle 21 First opening 22 Ring sensor 23 First grip lever 24 Second receptacle 25 Receiving body 26 Second opening 27 Second grip lever 28 Toothed rack 29 Teeth 30 Drawing lever holder 31 Drawing lever support 32 Slide plate 33 Post 34 Pivot bearing 35 Bulge 36 Metering lever 37 Leg 38 Leg 39 Pawl 40 Pawl tooth 41 Cover 42 First cover part 43 Second cover part 44 Head section 45 Notch 46 Notch 47 Tapering 48 First strip-shaped section 49 Bend 50 Second strip-shaped section 51 Strip-shaped connecting section 52 Deflection 53 Leaf spring 54 Side part 55 Side part 56 Base 57 Channel 58 Top base part 59 Bottom base part 60 Ramp 61 Longitudinal slot 62 Top slot section 63 Bottom slot section 64 Web 65 Web 66 Web 67 Web 68 Coupling element 69 Recess 70 Catching edge 71 Holding surface 72 Bevel 73 Space 74 Wings 75 Wings 76 Guide slot 77 Bearing hole 78 Guide curve 79 Additional sensor 80 Cam 81 Transmission element 82 Transmission section 83 Bottom transmission element end 84 Bottom stop 85 Control arm 86 Control arm 87 Printed circuit board 88 Electronics 89 Rechargeable battery 90 Additional longitudinal slot 91 Axial hole 92 Adjustment screw 93 Adjustment thread 94 Screw fields