Disconnector device

DE502020010561D1Active Publication Date: 2025-03-27ROBERT BOSCH GMBH
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Patent Information

Application Number
DE502020010561
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2019-01-28
Filing Date
2020-01-20
Publication Date
2025-03-27
Estimated Expiration
2040-01-20
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Description

[0001] The invention is based on a circuit breaker device according to the preamble of claim 1. State of the art

[0002] A circuit breaker device according to the preamble of claim 1 is already known from EP2657950 A1. The key of this circuit breaker device causes the switch to move from an open to a closed position by rotating the key about its longitudinal axis. Reference is also made to GB 957 088 A and GB 419 114 A. Disclosure of the invention

[0003] A circuit breaker device having the features of claim 1 is proposed. Advantageous embodiments, variants, and further developments of the invention can be found in the subclaims.

[0004] The invention is based on a circuit breaker device for an electrical machine, in particular for a gardening device, preferably in the form of a lawnmower. It comprises a key, a key receptacle, and an electrical switch, in particular a spring-loaded electrical rocker switch. This switch has an actuating surface arranged adjacent to the key receptacle. It is proposed that tilting the key inserted into the key receptacle about a pivot axis leads to a displacement of the switch from an open to a closed position and vice versa. The pivot axis is predetermined by corresponding pivot bearing means on the key receptacle and key. In contrast to EP2657950 A1, the key is intended to be pivoted in the key receptacle and not rotated. Pivoting is understood to mean a pivoting movement transverse to the longitudinal axis of the key.The rotational movement of EP2657950 A1, on the other hand, occurs as a rotation around the longitudinal axis of the key. Pivoting has the advantage that the key can be transferred from a particularly convenient insertion position to a secure activation position, making penetration or accidental turning of the key more difficult. At least in the activation position, the key can be submerged in the silhouette or outer contour of the gardening tool. Thus, it does not remain in an area where it could be accidentally turned over by objects such as branches, twigs, or the like. This increases ease of use.

[0005] According to the invention, the key has a recess through which an element of the key receptacle passes to block the key from being removed when the key is pivoted in the key receptacle. The recess is formed as a hole in the key. The element can in particular be an extension, a pin, a wedge-like means, or the like. In particular, the recess is arranged opposite a gripping area with respect to a pivot axis of the key. It is arranged in the area intended to be fully inserted into the key receptacle. In particular, it is arranged between a front or an actuating section of the key opposite a gripping area of ​​the key and the pivot axis. This prevents the key from being removed when pivoting to activate the switch or in a position that activates the switch.Furthermore, this can influence, and in particular reduce, any play of the key in the key holder, especially when pivoting the key. It can be made possible to ensure that the key can only be pivoted when fully inserted into the key holder. This also increases convenience.

[0006] Activating the switch or pivoting the key is not possible while the key is being inserted. The aforementioned element prevents this. Only when the key is inserted to a position that allows pivoting, or inserted to a stop, can it be pivoted and the switch activated.

[0007] It is proposed that an element, in particular the aforementioned element, has a ramp. It is intended to position the key when inserted into the key receptacle within the key receptacle, in particular to pivot it, in particular into a loss-prevention position and / or a position that allows the element to penetrate the recess. This provides guidance for the key when inserted into and removed from the key receptacle. Jamming of the key, blocking problems, or the like are prevented. An insertion angle can be specified or restricted, in particular to a comfortable level, in particular restricted to an insertion angle or an insertion angle deviation of <45°.

[0008] It is proposed that an element, in particular the aforementioned element, comprise a guide means, in particular a guide means arranged remote from the aforementioned ramp, which reduces the key's play, in particular the key's axial play, in the key receptacle when pivoting the key. As a result, the key's play is increasingly reduced when inserted into the key receptacle, from a deactivated position of the key or switch to an activated position. Upon complete pivoting, in particular up to a stop, the play can be completely eliminated. This allows the force required to pivot the key against the switch, which is spring-loaded into its "off" position, to remain constant and / or reproducible. Furthermore, the actuating surface of the switch is at least approximately touched or contacted in the same way.This creates a sense of value for the user. By overcoming the force required to move the switch on the key, the user is intuitively alerted to the activation of the gardening tool. Accidental activation of the switch by moving the key is made more difficult. The transfer of the electrical tool, especially battery-operated ones, into an operational configuration (activation of the tool via the switch handle(s) is intuitively clear to the user. Accidental activation of the electrical tool can be avoided.

[0009] It is proposed that a barrier be arranged within the key receptacle to at least make it difficult to flip the switch without the key, in particular a labyrinth-like barrier provided between the opening of the key receptacle and the switch, preferably wherein the barrier is formed by at least one of the aforementioned elements. A line of sight to the switch, in particular to the actuating surface of the switch that is to be pressed down to activate the switch, is at least made more difficult, in particular avoided. This prevents inadvertent activation of the circuit breaker device. In particular, no stick, nail, or other substantially straight or flat object can be used instead of the key to activate the switch. This increases the safety of the circuit breaker device or of the electrical device or gardening tool provided therewith, in particular a lawnmower.

[0010] It is proposed that the circuit breaker device comprise means for securely holding the key in a position ready for removal, in particular by means of corresponding positive and / or non-positive engagement elements on the key receptacle and the key. This makes it possible to prevent the key from being lost, for example in a transport or storage position or situation. In order to separate the key inserted in the key receptacle, a force threshold must be overcome. The positive and / or non-positive engagement elements preferably simultaneously provide the pivot bearing for the key or partially form this. Preferably, the key receptacle, in particular on both sides of the key, comprises an elevation or extension which is intended to engage in a locking recess in the key. Thus, on the one hand, a pivot bearing and, on the other hand, a loss prevention device can be advantageously provided.

[0011] It is proposed that the pivot axis of the key be shifted to the side of an actuation area of ​​the key with respect to a center of gravity of the key. This makes it possible for the key to rest against the switch or the actuation surface of the switch in an insertion or loss-prevention position. The recess can sometimes interact at least partially with the aforementioned element, in particular to fix the key in place. When the key is arranged in the insertion or loss-prevention position, between the horizontal and vertical relative to the earth, i.e. in particular at an angle between 0 and 90°, preferably 30 and 60°, particularly preferably 45°, the force of gravity acting on the key can cause it to rest at least against the aforementioned element and / or the actuation surface of the switch, and / or improve the loss-prevention protection.

[0012] It is proposed that the key receptacle have a guide surface, in particular a guide surface facing the element, preferably facing the ramp of the element, which requires the insertion of the key into the key receptacle at an angle of 20° to 70°, in particular 30° to 60°, particularly preferably 45°, relative to a processing plane of the electrical device, in particular of the gardening device, in particular a cutting plane of the lawnmower. The frame and the guide surface are preferably at an acute angle to one another, for example at a 15° angle. This allows the key to be inserted into the key receptacle with a certain angular tolerance, at least initially. Furthermore, the key is centered upon full insertion and the play is reduced. This can increase operating comfort.

[0013] It is proposed that the key can assume two positions within the key receptacle: a first position in which the key activates the switch, and a second position in which the key does not activate and / or deactivate the switch, is held captively on the key receptacle, and is simultaneously removable. Thus, no additional pivoting or additional pivoting of the key is required to secure the key, for example, in a direction opposite to the direction for activating the switch.

[0014] It is proposed that the key has three states within the key receptacle, a first state in a position in which the switch is activated by tilting the key, a further state in which the switch is deactivated by tilting the key back and the key is held captively on the key receptacle, and a third state in which the key can be removed from the second state, in particular at least without a significant change in the tilting position.

[0015] It is proposed that the key be arranged parallel to the working plane of the electrical device, in particular the gardening device, in the first position, and be arranged at an angle of 20° to 70°, in particular 30° to 60°, particularly preferably 45°, relative to the working plane in the second position. This allows an operator to conveniently activate or remove the key. Due to the parallel arrangement in the first or activated position, the key can disappear within the housing contour.

[0016] It is proposed that the key be completely enclosed within the outline of the electrical device, in particular the gardening tool. The outline refers to the contour or silhouette of the lawnmower, in particular the envelope contour. Accidental actuation, in particular activation or deactivation of the switch, is thereby at least made more difficult, and in particular, prevented.

[0017] It is proposed that a housing of the electrical device, in particular a gardening device, has a recess, in particular a handle recess for carrying the lawnmower, on or in which the key receptacle is arranged. This allows the key to be easily accessible. Furthermore, it is at least adjacent to the handle and can sometimes even be reached by the handle while carrying the electrical device. By being arranged within easy reach of the handle, carrying and switching the electrical device, in particular a gardening device, on / off can ideally be carried out in a single operation.

[0018] The circuit breaker assembly provides a configuration in which the key is insertable into and removable from the key receptacle and the switch is open, and a configuration in which the key is pivoted relative to the key receptacle and presses against an actuating surface of the switch to close the switch.

[0019] The circuit breaker device allows the key to be molded from an electrically insulating material such as plastic, allowing the use of a fully loaded rocker switch. These are designed to prevent arcing and also provide a reliable means of ensuring the live plug is always disconnected from the electrical power source, rather than relying on a relay that may develop a fault.

[0020] Although the circuit breaker device is described below with reference to a lawn mower, the circuit breaker device of the present disclosure is suitable for use with any electrical device in which a power isolation function is to be included, for example, for safety reasons. However, it is particularly useful for battery-operated electrical devices, particularly power tools, where battery power presents the potential for unintentional or unauthorized operation of the device, most preferably lawn mowers, mulchers, or scarifiers. drawing

[0021] Further advantages will become apparent from the following description of the drawings. Several embodiments of the invention are illustrated in the drawings. The drawings, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0022] They show: Fig. 1An electrical machine in the form of a lawnmower with a circuit breaker device according to the invention; Fig. 2the key of the circuit breaker device in a schematic representation; Fig. 3the circuit breaker device in a first configuration in a schematic representation; Fig. 4the circuit breaker device in a second configuration in a schematic representation; Fig. 5the key receptacle of the circuit breaker device in a schematic representation; Fig. 6an alternative circuit breaker device which is not part of the invention, in a schematic representation; Fig. 7the key of the alternative circuit breaker device and the key receptacle in a schematic representation; Fig. 8the electrical switch in a schematic representation.

[0023] Fig. 1 shows a lawnmower 10 as an example of an electric machine,

[0024] in particular a garden tool, with a circuit breaker device 12. The lawn mower 10 comprises a housing 14, in or on which at least some other conventional components of a lawn mower 10 are arranged, such as a motor, a rotating blade, motor and control electronics, a power supply device (here a replaceable battery arranged under the hood 16), and other components typical of a lawn mower. The housing 14 is carried on wheels 18, but can also be supported on chains or in the manner of an air cushion. In the embodiment shown, the circuit breaker device 12 is arranged in the region of a carrying handle 20. A key 22 of the circuit breaker device 12 is visible. It is arranged such that it forms an outline or contour or silhouette of the housing 14 of the lawn mower 10, in at least one position or configuration (cf. Fig. 4 ), in particular in which a switch of the circuit breaker device is activated or closed. Thus, in this configuration, the key 22 does not protrude from the envelope contour of the housing 14, which makes accidental actuation of the key 22 more difficult. The key 22 is made of an insulating material, in particular plastic. In addition to the aforementioned configuration, the key 22 can also be inserted into the Fig. 1 or Fig. 3 shown position. In this position, the switch is deactivated - a power supply between the battery and the control or regulating unit of the lawn mower is interrupted. Activation of the motor or the cutter bar or cutting blade is impossible in this configuration. The key 22 is also held captive, but can in particular be removed immediately from this position. The key 22 can also come to rest within the outline of the lawn mower 10 in both positions or configurations. In principle, the isolating switch device 12 can also be arranged at other locations on the lawn mower 10. Because the key 22 is arranged in the area of ​​the carrying handle 20 of the lawn mower 10, it is easily accessible. In addition, it can be protected from damage in a recess 26 for the carrying handle 20.Furthermore, by arranging it in the recess 26 for the carrying handle 20, it can be easily arranged within the outline of the lawnmower 10, in particular for folding and pulling, and can remain accessible; a separate recess 26 on the lawnmower 10 to conveniently allow access to the key 22 is thus not required.

[0025] Fig. 2 shows a first embodiment of the key 22 in five views. The key 22 is constructed symmetrically, so that the top and bottom (middle view = top view) and the right and left sides (right view = side view) are identical. This allows the key to be inserted into a key receptacle 56 in two orientations, regardless of the orientation of the bottom or top side, i.e., in two orientations of the key. The front view of the inserted end is shown above. The rear view of the end shown below is shown in Fig. 1 visible, in particular thickened end can be seen. On the left is a perspective view. The key 22 comprises a handle or handle region, a thickened portion 30 and a switch actuation section 32. It is essentially flat. Furthermore, it is essentially rectangular. The thickened portion 30 prevents the key 22 from being inserted the wrong way around into the key receptacle 56, since the thickened portion is higher than the opening 72 of the key receptacle 56. This intuitively forces the user to correctly insert the key 22 into the key receptacle 56. Furthermore, the key 22 has a recess 34. Furthermore, it has a hole 36 with which it can be attached to a key chain, for example. A symbol, here in the form of an arrow 38, indicates an insertion direction or insertion direction. The handle region or handle 28 has ribs 40 that run transversely to the insertion direction. This improves the haptics.In the perspective view, as well as the front and side views, a groove 42 is also visible. This groove 42 is arranged on the side of the key. It has two sections with different pitches. A first section 44 in the area of ​​the switch actuating section 32, wherein the groove(s) 42 spread out from the switch actuating section 32 in the direction of the handle 28, in particular at an acute angle, relative to a central longitudinal axis 43 or to one another. And a section 46 in which they run parallel to the central longitudinal axis 43. Finally, a section 48, which can be formed either by a further recess in the section 46 (towards the central longitudinal axis 43) and / or by positive and / or non-positive locking elements 50, in particular in the form of a thickened portion, a bump, or the like, which separate the section 48 from the section 46 of the groove. This section 48 also serves as a tilting or pivoting bearing for the key 22.The pivot axis 54 of the key 22 runs through this section 48. The pivot axis 54 is displaced in the direction of the switch actuating section 32 with respect to a center of gravity S of the key 22.

[0026] Fig. 3 shows a section of the lawn mower 10 of the Fig. 1 in a sectional view. The carrying handle 20, the disconnecting switch device 12 and the key 22 are cut in the middle. Furthermore, the Fig. 5 separately shown key holder 56, as well as the Fig. 8 Separately shown switch 60, shown in section through the center. In a sense, the key receptacle 56, together with a lawnmower housing section 58, which is also shown in section through the center, forms the key insertion receptacle.

[0027] The circuit breaker device 12 is shown in a configuration in which the switch 60 is deactivated. The key 22 can be removed in this configuration, yet it is advantageously held captively. In particular, a force threshold must be overcome to remove the key 22. This force threshold is generated by the aforementioned positive and / or non-positive locking elements 50 on the key 22, as well as corresponding positive and / or non-positive locking elements 64 on the key receptacle 56 (see FIG. Fig. 5 ). This can also be achieved for a transition fit. On the key receptacle 56, these are extensions 66 or mandrels which dip into the groove 42 of the key 22. The corresponding positive and / or non-positive locking elements 50, 64 advantageously form a transition fit. When inserting the key 22, these extensions 66 must overcome the positive and / or non-positive locking elements 50 on the groove 42 or the key 22, or be pushed over them. At the same time, the extensions 66 form the pivot bearing for the key 22. The pivot axis 68 of the key receptacle 56 runs through them, which, when the key 22 and key receptacle 56 are connected, is identical to the pivot axis 54 of the key 22. According to Fig. 3 the key 22 is inserted into the key receptacle 56 up to a stop 62. The key 22 is at an angle of approximately 45° to the machining plane or cutting plane 70 (cf. Fig. 1 ) of the lawn mower 10. The key 22 is inserted through the opening 72 (see also Fig. 5 inserted into the key receptacle 56. It can be guided by an element 74 of the key receptacle 56. A ramp 76 of the key receptacle 56, in particular of the element 74, is provided to position the key 22 within the key receptacle 56 when inserted into the key receptacle 56, in particular to pivot or guide it.

[0028] If the key 22 is fully inserted into the key receptacle 56, it is in a loss-prevention position and / or a position that allows the element 74 to penetrate the recess 34.

[0029] The element 74 can further comprise a guide means 78 on a side facing away from the ramp 76. This reduces play of the key 22, in particular axial play of the key 22, in the key receptacle 56 when the key 22 is pivoted. In particular, the guide means 78 increasingly reduces the play or axial play, preferably completely, when the key 22 is pivoted completely up to a stop 80.

[0030] Furthermore, a barrier 82 is arranged within and / or on the key receptacle 56 to at least make it difficult to flip the switch 60, or an actuating means 61 of the switch 60, or its actuating surface 63, without the key 22. In particular, this barrier 82 is provided between the opening 72 of the key receptacle 56 and the switch 60, for example, as a labyrinth-like barrier 82. Advantageously, the element 74 forms the barrier 82. Here, the barrier 82 is a wall the width of the recess 34.

[0031] The key holder has a guide surface 84 (cf. Fig. 3 and 4), in particular a guide surface 84 facing the element 74, preferably facing the ramp 76 of the element 74. This requires the insertion of the key 22 at an angle of 20° to 70°, in particular 30° to 60°, particularly preferably 45°, relative to the working plane 70 of the lawnmower 10. Furthermore, the ramp 76 and the guide surface 84 are arranged at an acute angle to one another, here of ~15°. This allows a certain tolerance when inserting the key 22. The key 22 is centered during insertion and aligned to the insertion angle of approximately 45° until it is fully inserted.

[0032] Fig. 4 shows the circuit breaker device 12 in a position or configuration in which the switch 60 is activated. The actuating means 61 or the actuating surface 63 of the switch 60 is pressed down. Against a spring force of the rocker switch, this has caused the key 22 to pivot by approximately 45° about the pivot axis 54, 64. At the same time, the recess 34 of the key 22 is slipped over the element 74, or the element 74 protrudes through the recess 34. The guide means 78, through its pitch or geometry, has limited the play of the key 22 in the axial direction, along the central longitudinal axis 43 of the key 22. The key 22 strikes the stop 80, which prevents further rotation of the key 22. In order to transfer the switch 60 into the closed state, a spring force of a spring (not shown) of the switch 60 had to be overcome.To do this, a force perceptible to the user had to be applied to the key 22 when pivoting it, which intuitively illustrates the activation of the electrical device or lawnmower 10. It can be seen that the recess 34 of the key 22 is intended to be penetrated by the element 74 of the key receptacle 56 to block the removal of the key 22 when pivoting the key 22 in the key receptacle 56. In particular, from . Fig. 3 and 4 It is also visible that the ramp 76 is intended to position the key 22 when inserted into the key receptacle 56 within the key receptacle 56, in particular to pivot it, in particular into a loss-prevention position and / or a position that allows the element to penetrate the recess (cf. Fig. 3 ), to be positioned. Furthermore, it is visible that the element 74 or the barrier 82 is arranged in such a way that turning the switch 60 or the actuating surface 63 without the key 22 is at least made more difficult. To a certain extent, a line of sight through the opening 72 of the key receptacle 56 directly to the actuating surface 63 is impossible due to the barrier 82 - thus, the element 74 represents a labyrinth-like barrier 82 arranged between the opening 72 and the switch 60. It is also visible that the pivot axis 54, 68 of the key 22 is shifted with respect to a center of gravity S of the key 22 to the side of a switch actuating section 32 or actuating area 86 of the key 22. Due to the gravitational force G acting on the key 22, or the gravitational force G acting on the center of gravity S around the pivot axis 54, 68, a moment acts on the handle 28 of the key around the pivot axis 54, 68 in the direction of the cutting plane 70.This is not sufficient to operate the rocker switch or switch 60, but can sometimes be useful as a loss protection and sometimes prevents the key 22 from rattling in the key receptacle 56. Furthermore, the good accessibility of the key 22 is ensured by the arrangement of the disconnect switch device 12 or the key receptacle 56, or of the key 22 in a recess 88, in particular a handle recess for carrying the lawn mower 10. This recess 88 surrounds the carrying handle 20. As a result of this recess 88, the key 22 does not protrude beyond the contour of the housing 14, at least in the position that activates the switch 60. Inadvertent turning of the key 22, for example during operation of the lawn mower 10 due to hanging branches or the like, is made more difficult.

[0033] Fig. 6 represent an alternative circuit breaker device 12A, which is not part of the invention, and shows it in two configurations and two views each. On the left, in a configuration in which the switch 60A is closed - top in a perspective view, below in a sectional view. On the right, in a configuration in which the switch 60A is open - also top in a perspective view, below in a sectional view. Furthermore, the key 22A and the key receptacle 56A are shown separately in Fig. 7 Shown - the key in bottom, side, and top views (left from top to bottom); the key receptacle 56A on the right.

[0034] To make it easier to distinguish from the first embodiment according to Fig. 2 bis 5 At least functionally similar, in particular identical, components were provided with the suffix A. A person skilled in the art will recognize the functional similarity between the first and second embodiments and transfer and / or combine the findings, and sometimes derive further embodiments therefrom.

[0035] In contrast to the first embodiment, the recess 34A extends, see in particular. Fig. 7essentially on both sides along the side surface of the key 22A. Only the switch actuating section 32A is somewhat wider than the rest of the key 22A. For this purpose, the key receptacle 56A has a groove 90A on both sides. This groove 90A essentially forms a guide for inserting the key 22A into the opening 72A of the key receptacle. A web 92A that becomes wider from the switch actuating section 32A enables centering and alignment of the key 22A. In this way, the key 22A can also be inserted into the key receptacle 56A with a certain angular variation of 35° + 0-30°. With increasing insertion, the insertion angle approaches a desired value - in this case around 35°. Once the key 22A is inserted to the stop 94A, the switch actuating section 32A can be pivoted from the groove 90A into another groove 96A, thereby activating the switch 60A. Furthermore, the key 22A can no longer be removed.The 60A switch is also a spring-loaded rocker switch, which requires a spring force to be overcome when activated.

[0036] A disadvantage of the second embodiment is that, due to the different top and bottom surfaces, the key can only be inserted into the key receptacle 56A with the top side facing up. Furthermore, the element 74A for blocking withdrawal does not simultaneously form a barrier against improper use.

Claims

1. Electric gardening work appliance, in particular a lawnmower, having a switch disconnector device (12) comprising a key (22), a key receptacle (56) and an electrical switch (60), in particular a spring-preloaded electrical rocker switch, with an actuating surface (63) arranged adjacent to the key receptacle (56), characterized in that tilting of the key (22), which is inserted into the key receptacle (56), about a pivot axis (54, 64) transversely to the longitudinal axis of the key leads to displacement of the switch (60) from an open position to a closed position and vice versa, and in that the key (22) has a recess (34) which is in the form of a hole and an element (74) of the key receptacle (56) is intended to penetrate the recess in order to block removal of the key (22) when the key (22) is pivoted in the key receptacle (56).

2. Electric gardening work appliance according to Claim 1, characterized in that the element (74) has a ramp (76) which is intended to position the key (22), when it is inserted into the key receptacle (56), within the key receptacle (56), in particular to position the key in a captive position which allows the element (74) to penetrate a cutout (26).

3. Electric gardening work appliance according to Claim 1 or 2, characterized in that the element (74) has a guide means (78) which, when the key (22) is pivoted, reduces play of the key (22) in the key receptacle (56), in particular reduces axial play of the key (22) in the key receptacle (56).

4. Electric gardening work appliance according to any of the preceding claims, characterized in that a barrier (82) is arranged within the key receptacle (56) in order to at least make it difficult to move the switch (60) without the key (22), in particular a labyrinthine barrier (82) provided between the opening (72) of the key receptacle (56) and the switch (60).

5. Electric gardening work appliance according to any of the preceding claims, characterized in that the switch disconnector device (12) has means to captively hold the key (22) in a ready-to-remove position, in particular by corresponding interlocking and / or force-fitting elements (50, 64) on the key receptacle (56) and the key (22).

6. Electric gardening work appliance according to any of the preceding claims, characterized in that the pivot axis (54, 68) of the key (22) is displaced, with respect to a centre of gravity (S) of the key (22), to the side of a switch actuating portion (32) of the key (22).

7. Electric gardening work appliance according to any of the preceding claims, characterized in that the key receptacle (56) has a guide surface (84), in particular has a guide surface (84) which faces the element (74), preferably faces the ramp (76) of the element (74), and requires the insertion of the key (22) at a 20° to 70°, in particular 30° to 60°, particularly preferably 45°, angle with respect to a work plane (70) of the electric appliance, in particular the gardening work appliance, in particular the cutting plane of the lawnmower (10).

8. Electric gardening work appliance according to any of the preceding claims, characterized in that the key (22) can assume two positions within the key receptacle, a first position in which the key (22) activates the switch (60) and a second position in which the key (22) deactivates the switch (60), wherein the key (22) is captively held on the key receptacle (56) and at the same time is removable.

9. Electric gardening work appliance according to any of the preceding claims, characterized in that the key (22) is arranged parallel to the work plane (70) of the electric gardening work appliance in a first position and is arranged at a 20° to 70°, in particular 30° to 60°, particularly preferably 45°, angle with respect to the work plane (70) in the second position.

10. Electric gardening work appliance according to any of the preceding claims, characterized in that the key (22) is fully received within the periphery of the housing (14) of the electric gardening work appliance.

11. Electric gardening work appliance according to any of the preceding claims, characterized in that the housing (14) of the electric gardening work appliance has a depression (26), in particular a grip depression for carrying the lawnmower, on or in which the key receptacle (56) and / or the key (22) is arranged.