CN107864749B - Robot mower and emergency stop switch - Google Patents

Abstract

The invention discloses a robot mower and a scram switch, wherein the robot mower is provided with the scram switch, the scram switch comprises a mounting part, a trigger arranged on the mounting part and a switch cap arranged opposite to the mounting part, a trigger mechanism of the trigger is arranged between the switch cap and the mounting part, the opposite direction of the switch cap and the mounting part is defined as an axial direction, one of the switch cap and the robot mower is provided with a guide groove extending along the axial direction, and the other one of the switch cap and the robot mower is provided with a guide piece capable of sliding in the guide groove. The guide groove limits the movement direction of the guide piece, so that the movement direction of the switch cap is limited, no matter where the operator presses the switch cap in which direction, the switch cap can only move along the axial direction under the cooperation of the guide groove and the guide piece, and the switch cap is prevented from being pressed ineffectively, so that the trigger is effectively triggered by the switch cap.

Description

Robot mower and emergency stop switch

Technical Field

The invention relates to a robot mower. The invention also relates to an emergency stop switch.

Background

A lawn mower is a lawn-trimming tool that generally includes a housing, a set of wheels, and a cutting system that is capable of traveling over a lawn and cutting the lawn. At present, a mower mainly uses a gasoline engine, an alternating current commercial power system or a direct current battery pack as cutting power, and is pushed by manpower to walk back and forth on a lawn to finish nursing and trimming of grasslands. However, when the gasoline engine is used, combustion exhaust gas is generated, and great noise is generated, so that serious and multiple pollution is caused to operators and working environments, and especially the working areas of mowers are usually household grasslands, public greens and the like, and the quality of life of the public is seriously influenced. However, a mower using commercial power as power needs to be connected with a cable for work, the application range is limited, and the mower has certain danger. Moreover, the labor intensity of pushing the gasoline mower or the commercial power mower to mow is high.

Compared with the traditional product, the robot mower has the automatic walking function, can prevent collision, prevents outgoing lines in a range, automatically returns to charge, has the functions of safety detection and battery power detection, has certain climbing capacity, and is particularly suitable for lawn trimming maintenance in places such as family courtyards and public greenhouses. The robot mower can automatically complete the work of trimming the lawn without manual direct control and operation, and has the advantages of low power, low noise, no pollution, exquisite and attractive appearance and greatly reduced manual operation.

In case of emergency, the robot mower needs to stop immediately, so the upper part of the robot mower is usually designed with a sudden stop switch. The existing scram switch infinite position mechanism can be invalid in pressing, so that the robot mower cannot stop immediately as required.

Disclosure of Invention

The invention aims to provide a robot mower, wherein a sudden stop switch on the robot mower can prevent invalid pressing.

In order to achieve the above object, the present invention provides a robotic lawnmower, wherein a scram switch is provided on the robotic lawnmower, the scram switch includes a mounting portion, a trigger provided on the mounting portion, and a switch cap provided opposite to the mounting portion, a trigger mechanism of the trigger is located between the switch cap and the mounting portion, a direction in which the switch cap and the mounting portion are opposite to each other is defined as an axial direction, a guide groove extending in the axial direction is provided on one of the switch cap and the robotic lawnmower, and a guide piece slidable in the guide groove is provided on the other of the switch cap and the robotic lawnmower.

As a further improvement of an embodiment of the present invention, an end of the guide groove close to the switch cap is closed, an end of the guide groove remote from the switch cap is opened, and a length of the guide groove is longer than a movement stroke of the switch cap in the axial direction.

As a further improvement of one embodiment of the present invention, the number of the guide members is plural, and when the edge on one side of the switch cap is pressed, the switch cap rotates around the axis on the opposite edge on the other side, the axis passes through the two guide members adjacently arranged on the same side, and neither of the axes passes through the trigger mechanism.

As a further development of an embodiment of the invention, the center line of the guide forms the axis.

As a further improvement of one embodiment of the invention, the line connecting the points of contact of the guide with the closed ends of the guide grooves constitutes the axis.

As a further improvement of an embodiment of the present invention, the switch cap includes a top surface and a side surface extending from the top surface in a direction toward the mounting portion, the guide is provided on the side surface, an outer arc transitions between the top surface and the side surface, the outer arc is centered on the axis, and an inner arc corresponding to the outer arc is provided on the robotic mower.

As a further improvement of an embodiment of the present invention, a supporting elastic member is disposed between the mounting portion and the switch cap, a triggering elastic member is disposed between the trigger and the switch cap, and the switch cap compresses the triggering elastic member before the supporting elastic member reaches a maximum stroke in a process of pressing the switch cap to move toward the mounting portion.

As a further improvement of an embodiment of the present invention, the scram switch further includes a support plate disposed between the trigger and the switch cap and abutting the switch cap, and the support elastic member abuts the support plate.

As a further improvement of an embodiment of the present invention, the plurality of supporting elastic members are distributed radially, and the plurality of supporting elastic members enclose the triggering elastic member therein.

Compared with the prior art, the invention has the beneficial effects that: because the guide slot on the emergency stop switch of the robot mower limits the movement direction of the guide piece, the movement direction of the switch cap is limited, no matter where the switch cap is pressed by an operator along what direction, the switch cap can only move along the axial direction under the cooperation of the guide slot and the guide piece, so that the switch cap is prevented from being pressed ineffectively, and the trigger is effectively triggered. Therefore, the robot mower can stop at any time when needed, and safety is guaranteed.

Another object of the present invention is to provide a scram switch that can prevent press invalidity.

In order to achieve the above object, the present invention provides a scram switch mounted on a control object to stop the operation of the control object, the scram switch including a mounting portion, a trigger disposed on the mounting portion, and a switch cap disposed opposite to the mounting portion, a trigger mechanism of the trigger being disposed between the switch cap and the mounting portion, a direction in which the switch cap and the mounting portion are opposite being defined as an axial direction, one of the switch cap and the control object being provided with a guide groove extending in the axial direction, and the other of the switch cap and the control object being provided with a guide piece slidable in the guide groove.

Compared with the prior art, the invention has the beneficial effects that: because the guide slot on the emergency stop switch limits the movement direction of the guide piece, the movement direction of the switch cap is limited, no matter in which direction an operator presses the switch cap, the switch cap can only move along the axial direction under the cooperation of the guide slot and the guide piece, so that the switch cap is prevented from being invalid to trigger the trigger effectively.

Drawings

FIG. 1 is a top view of a robotic lawnmower provided according to a first embodiment of the present invention;

FIG. 2 is an enlarged cross-sectional view of the flexible connection section of the inner and outer housings of the robotic lawnmower shown in FIG. 1;

FIG. 3 is an enlarged cross-sectional view of the scram switch portion of the robotic lawnmower shown in FIG. 1 in the P-P direction;

FIG. 4 is an exploded schematic view of the scram switch shown in FIG. 2;

FIG. 5 is a perspective view of a switch cap of the scram switch of the robotic lawnmower shown in FIG. 1, the bottom surface of the switch cap being visible;

FIGS. 6 a-6 d are simplified pictorial illustrations of the movement of the switch cap;

Fig. 7 is a schematic structural diagram of an emergency stop switch according to a second embodiment of the present invention.

Some embodiments of the invention will be described in detail hereinafter, by way of example and not by way of limitation, with reference to the accompanying drawings. The same or similar parts or portions are denoted by the same reference numerals in the drawings. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the invention and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the invention.

In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally formed, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween.

Fig. 1 to 6 show a robot lawnmower 100 and an emergency stop switch 20 thereon according to a first embodiment of the present invention.

Referring to fig. 1 and 2, a robotic lawnmower 100 is provided for automatically walking and mowing on the ground. Since the robot lawnmower 100 can automatically walk and work (mow) on the ground, the robot lawnmower 100 is, from one perspective, an intelligent device, a robot. From another perspective, the robotic lawnmower 100 is operated to mow grass, and thus, the robotic lawnmower 100 is a type of lawnmower.

In the present embodiment, the housing of the robotic lawnmower 100 includes an inner housing 99 and an outer housing 97 flexibly connected to the inner housing 99. Because the robot mower 100 can walk automatically, the robot mower is inevitably encountered with an obstacle, when the robot mower encounters the obstacle, the outer housing 97 collides with the obstacle, and the inner housing 99 is flexibly connected with the outer housing 97, so that the outer housing 97 can displace to a certain extent relative to the inner housing 99, a buffer effect is achieved, at least a part of impact force borne by the outer housing 97 can be relieved and then transmitted to the inner housing 99, and the inner housing 99 and other components on the inner housing 99 can be prevented from being damaged due to impact, which is particularly important for the robot mower 100 needing precise control.

In this embodiment, the inner case 99 and the outer case 97 are preferably flexibly connected by an elastic member. In the present embodiment, the elastic member is a coil spring 95. It will be appreciated by those skilled in the art that the flexible connection between the inner housing 99 and the outer housing 97 may be achieved by other types of elastic members, and that the same or similar embodiments are contemplated as those of the present embodiment.

Referring to fig. 1, 3 and 4, the robot lawnmower 100 is provided with a scram switch 22, and the robot lawnmower 100 stops operating by pressing the scram switch 22.

In this embodiment, the emergency stop switch 22 is a waterproof switch, and includes a mounting portion 26, a trigger 28 provided on the mounting portion 26, and a switch cap 30 provided opposite to the mounting portion 26, a trigger mechanism 32 of the trigger 28 is located between the switch cap 30 and the mounting portion 26, a direction in which the switch cap 30 and the mounting portion 26 are opposite is defined as an axial direction, and a projection of the trigger mechanism 32 is always within a projection of the switch cap 30 on a plane perpendicular to the axial direction. Therefore, in the axial direction, the switch cap 30 can shield the triggering mechanism 32 from rainwater (or other damages, which will not be described further below) to avoid the triggering mechanism 32 from being damaged by water.

In this embodiment, preferably, the projection of the entire trigger 28 is located within the projection of the switch cap 30 in a plane perpendicular to the axial direction, and the projection outer edge of the trigger 28 is disposed at a distance from the projection outer edge of the switch cap 30. Therefore, in the axial direction, the switch cap 30 can shield the trigger 28, and the switch cap 30 can shield rainwater on behalf of the trigger 28, so that the trigger 28 is prevented from being damaged by water. The emergency stop switch 20 is waterproof by shielding the trigger 28 by virtue of the large-area switch cap 30, so that a sealing structure is not needed, and the emergency stop switch is simple in structure, convenient to install and low in cost; and the emergency stop switch 20 does not need a sealing structure, so that special safety requirements of the sealing switch are not required to be met, a trigger 28 which is universal in the market can be adopted as required, the design is more convenient, the safety requirements can be met, and the cost is reduced.

In the present embodiment, the trigger 28 is a micro switch, and those skilled in the art will recognize that other types of switches are also possible, and all the embodiments that are the same or similar to the present embodiment are included in the scope of the present invention.

In the present embodiment, the mounting portion 26 is configured to be fixedly connected to the inner housing 99 of the robotic lawnmower 100, and preferably, the mounting portion 26 is integrally formed with the inner housing 99 of the robotic lawnmower 100.

It will be appreciated by those skilled in the art that the emergency stop switch 20 may be mounted to the robotic lawnmower 100 as a separate unit, and therefore, the mounting portion 26 may be a separate component that is mounted to the inner housing 99 of the robotic lawnmower 100 by means of a screw or the like.

The mounting portion 26 is in a boss shape, and is provided with a supporting body 36 and a bedplate 38, the supporting body 36 has a certain height along the axial direction, and even if the water quantity is large, the water cannot overflow the supporting body 36 to influence the trigger 28, so that the trigger 28 is prevented from being soaked in water and damaged.

The trigger 28 is disposed on the platen 38, and preferably the trigger 28 is disposed on a side surface of the platen 38 adjacent the switch cap 30, that is, the entire trigger 28 is disposed between the switch cap 30 and the mounting portion 26, thereby better protecting the trigger 28 from water wetting the trigger 28.

In this embodiment, the switch cap 30 is movably connected to the outer case 97, and the operator can press the switch cap 30 to trigger the trigger 28. In this embodiment, the outer casing 97 constrains the switch cap 30 in a direction perpendicular to the axial direction, when the robot encounters an obstacle, the outer casing 97 collides with the obstacle, the switch cap 30 can move along with the outer casing 97, and since the inner casing 99 is flexibly connected with the outer casing 97, the outer casing 97 and the switch cap 30 can displace to a certain extent relative to the inner casing 99, so as to play a role in buffering, the impact force applied to the outer casing 97 and the switch cap 30 can be relieved at least partially and then transferred to the inner casing 99, and other components on the inner casing 99 and the inner casing 99, such as the mounting portion 26, can be prevented from being damaged due to impact.

In this embodiment, the outer housing 97 of the robotic lawnmower 100 is provided with an opening 93, and the switch cap 30 is at least partially inserted into the opening 93, and the switch cap 30 is slidable in the axial direction within the opening 93 to trigger the trigger 28.

The switch cap 30 includes a top surface 49 and side surfaces 50 extending from the top surface 49 in a direction toward the mounting portion 26. Rainwater can flow down this side 50, avoiding that the rainwater wets the trigger 28.

In the present embodiment, preferably, the projection of the mounting portion 26 is located within the projection of the switch cap 30 on a plane perpendicular to the axial direction. More preferably, the outer projection edge of the mounting portion 26 is spaced a distance from the outer projection edge of the switch cap 30. That is, in the axial direction, the switch cap 30 may shield the mounting portion 26, and the switch cap 30 may shield rainwater instead of the mounting portion 26.

More preferably, in this embodiment, the projection of the trigger 28 is located within the projection of the mounting portion 26 in a plane perpendicular to the axial direction. More preferably, the outer projection edge of the trigger 28 is spaced a distance from the outer projection edge of the mounting portion 26. Thus, the switch cap 30 shields the mounting portion 26 and the trigger 28 from rainwater at the same time, and since the projected outer edge of the trigger 28 is spaced a certain distance from the outer edge of the mounting portion 26, the trigger 28 can be kept dry even if a part of the rainwater wets the outer edge of the mounting portion 26 when it falls from the switch cap 30.

In the present embodiment, a supporting elastic member 52 is preferably provided between the mounting portion 26 and the switch cap 30, and a triggering elastic member 56 is preferably provided between the trigger 28 and the switch cap 30.

The supporting elastic member 52 can support the switch cap 30, and when the switch cap 30 is not subject to external force, the supporting elastic member 52 supports the switch cap 30, so that the switch cap 30 is disposed at a certain distance from the triggering elastic member 56. That is, the switch cap 30 is not subjected to external force, and the trigger 28 is not triggered.

The trigger spring 56 is sleeved on the trigger mechanism 32 of the trigger 28, and the trigger 28 is triggered when the switch cap 30 is forced to move in a direction toward the trigger 28 and compress the trigger spring 56.

In depressing the switch cap 30 to trigger the trigger 28, the switch cap 30 has compressed the trigger spring 56 before the support spring 52 reaches a maximum travel. Thus, the trigger 28 can be effectively triggered before the support spring 52 is compressed to a maximum stroke, avoiding a switch failure.

In the present embodiment, the emergency stop switch 20 further includes a support plate 58 provided between the mounting portion 26 and the switch cap 30 and slidably abutting against the switch cap 30, and the support elastic member 52 abuts against the support plate 58. The support plate 58 is configured such that when the switch cap 30 is pressed, the switch cap 30 presses the trigger mechanism 32 through the support plate 58, thereby activating the trigger 28.

As described above, the outer case 97 and the inner case 99 of the robot lawnmower 100 of the present embodiment are flexibly connected by the coil spring 95. In the present embodiment, the coil spring 95 preferably extends in the axial direction. Simple structure, simple to operate.

The outer casing 97 and the inner casing 99 are flexibly connected by an elastic member, and the outer casing 97 is configured to be relatively offset from the inner casing 99 in a direction at least perpendicular to the axial direction; when the outer case 97 is displaced relative to the inner case 99 against the obstacle, since the switch cap 30 is at least partially inserted into the opening 93 in the outer case 97, the mounting portion 26 is fixedly mounted on the inner case 99, the switch cap 30 is displaced relative to the mounting portion 26 mounted on the inner case 99 together with the outer case 97, and the switch cap 30 is displaced relative to the trigger 28 mounted on the mounting portion 26, so that the press failure is likely to occur.

In this embodiment, the projection of the triggering mechanism 32 is preferably always within the projection of the support plate 58 in a plane perpendicular to the axial direction, and the projection of the support plate 58 is not always completely outside the projection of the switch cap 30.

Since the projection of the support plate 58 is not always completely outside the projection of the switch cap 30, that is, even if the switch cap 30 is offset with respect to the inner case 99 along with the outer case 97, the projections of the switch cap 30 and the support plate 58 always have overlapping portions, so that it is ensured that the support plate 58 can be pressed down when the switch cap 30 is pressed down. While the projection of the trigger mechanism 32 is always within the projection of the support plate 58, it is ensured that the trigger mechanism 32 is triggered when the support plate 58 is depressed, thereby preventing a depression failure. In this embodiment, preferably, the support plate 58 is substantially unconstrained by the switch cap 30 in a direction perpendicular to the axial direction. That is, when the switch cap 30 is offset with the outer housing 97 relative to the inner housing 99, the support plate 58 is not substantially offset. While the friction between the switch cap 30 and the support plate 58 may be minimized to maximize the likelihood of the support plate 58 being deflected with the switch cap 30 to prevent scram switch failure, in actual practice the friction is substantially impossible to eliminate, so the so-called "substantial" does not preclude the support plate 58 from being deflected with the switch cap 30 a small distance that would otherwise not cause scram switch failure.

In this embodiment, the support plate 58 is located between the inner housing 99 and the outer housing 97, and the switch cap 30 is slidable relative to the support plate 58, so that when the switch cap 30 is displaced along with the outer housing 97, the support plate 58 is not substantially displaced along with the outer housing 97, at least the support plate 58 moves a distance smaller than the switch cap 30, and even if the switch cap 30 is displaced relative to the support plate 58 due to the large stress surface between the support plate 58 and the switch cap 30, the trigger 28 is activated by pressing the support elastic member 52 by the support plate 58, thereby overcoming the problem of pressing failure.

In this embodiment, the top surface 59 of the support plate 58 is preferably a plane perpendicular to the axial direction, and the bottom surface of the switch cap is slidable on the top surface of the support plate. The top surface 59 of the support plate 58 is in surface contact with the bottom surface 31 of the switch cap 30. The surface contact stabilizes the relative sliding between the support plate 58 and the switch cap 30, thereby avoiding deformation of the support elastic member 52 abutting against the support plate 58 and avoiding affecting the operation experience and damage of the scram switch 22.

Referring to fig. 5, the bottom surface 31 of the opening and closing cap 30 is formed as another plane perpendicular to the axial direction, and the bottom surface 31 of the opening and closing cap 30 is slidable on the top surface 59 of the support plate 58. In the present embodiment, the bottom surface 31 of the switch cap 30 is a plane formed by the bottom surfaces of the plurality of reinforcing ribs 33. The bottom surface 31 of the switch cap 30 is a plane formed by the reinforcing ribs 33, so that the weight of the switch cap 30 can be reduced without affecting the strength of the switch cap 30, the stress of the supporting elastic piece 52 can be reduced, and the service life of the scram switch 22 can be prolonged.

Referring back to fig. 3 and 4, the support elastic member 52 has one end abutting against the support plate 58 and the other end abutting against the mounting portion 26. Specifically, the surface of the supporting plate 58 facing the mounting portion 26 is disposed on the guide post 60, the surface of the mounting portion 26 facing the supporting plate 58 is disposed on the boss 62, the supporting elastic member 52 is sleeved on the guide post 60, one end of the supporting elastic member is abutted with the supporting plate 58, and the other end of the supporting elastic member is abutted with the boss 62.

In the present embodiment, the supporting elastic member 52 is indirectly abutted against the mounting portion 26 by abutting against the boss 62, and it is conceivable for those skilled in the art that the supporting elastic member 52 may directly abut against the mounting portion 26. It will also be appreciated by those skilled in the art that the support plate 58 is provided with a boss 62 and the mounting portion 26 is provided with a guide post 60; alternatively, the supporting elastic member 52 may be directly abutted against the supporting plate 58, which is not described herein, and the same or similar scheme as the present embodiment is adopted to cover the protection scope of the present invention.

The switch cap 30 compresses the supporting elastic member 52 through the supporting plate 58, and the supporting elastic member 52 is in a flat plate shape, so that the supporting elastic member 52 is abutted with the flat plate-shaped supporting plate 58, the installation requirement on the supporting elastic member 52 is lower, the whole end part of the supporting elastic member 52 can be abutted with the supporting plate 58, the supporting elastic member 52 is stressed more uniformly, and the function of the supporting elastic member can be better exerted.

In this embodiment, preferably, the projection of the support plate 58 is located within the projection of the switch cap 30 in a plane perpendicular to the axial direction, and the projection edge of the support plate 58 is disposed at a distance from the projection edge of the switch cap 30. That is, the floor area of the supporting plate 58 is smaller than that of the switch cap 30, and the supporting elastic piece 52 is abutted with the supporting plate 58 with smaller floor area, so that the trigger 28 is triggered more reliably, and the operation experience of a user is improved.

More preferably, the projection of the support plate 58 is located within the projection of the mounting portion 26, and the projection edge of the support plate 58 is spaced from the projection edge of the mounting portion 26. I.e., the floor area of the support plate 58 is smaller than the floor area of the mounting portion 26, better enhancing the user's operational experience.

Similarly, the flat support plate 58 with a smaller floor area can make the triggering elastic member 56 more uniformly stressed, and the operation experience is better.

In this embodiment, the supporting plate 58 is a square plate, the number of the supporting elastic members 52 is four, the four supporting elastic members 52 are radially distributed and are respectively disposed near four corners of the square supporting plate 58, so that the supporting plate 58 is more stressed uniformly, and the operation experience is better.

The four supporting elastic pieces 52 enclose the triggering elastic pieces 56 therein, no matter which supporting elastic piece(s) 52 are pressed by the stress of the switch cap 30, the triggering elastic pieces 56 can be effectively compressed to trigger the trigger 28, the structural layout is reasonable, and the triggering is reliable.

It will be appreciated by those skilled in the art that the support plate 58 has other shapes, the number of the support elastic members 52 is any other number, and the plurality of support elastic members 52 are radially distributed and enclose the trigger elastic members 56 therein, so that the trigger 28 can be effectively triggered. Preferably, the shape of the supporting plate 58 may be circular or polygonal as many as the number of the supporting elastic members 52, so that the structural layout is reasonable, the triggering is reliable, and all the solutions same as or similar to the present embodiment are included in the protection scope of the present invention.

As previously described, the outer housing 97 of the robotic lawnmower 100 is provided with an opening 93, and the switch cap 30 is at least partially inserted into the opening 93, and the switch cap 30 slides axially within the opening 93 to trigger the trigger 28. The opening 93 may provide a first re-guide for the axial movement of the switch cap 30.

In the present embodiment, the housing of the robot lawnmower 100 is preferably provided with a guide groove 80 extending in the axial direction, and the switch cap 30 is preferably provided with a guide 82 slidable in the guide groove 80. The guide groove 80 restricts the movement direction of the guide 82, thereby restricting the movement direction of the switch cap 30, and no matter where the operator presses the switch cap 30 in what direction, the switch cap 30 can only move in the axial direction under the cooperation of the guide groove 80 and the guide 82, preventing the pressing from tilting and the pressing from being ineffective, so that the switch cap 30 effectively triggers the trigger 28. The mating guide slot 80 and guide 82 provide a second amount of guidance for the axial movement of the switch cap 30.

It will be appreciated by those skilled in the art that the guiding member 82 may be provided on the housing of the robotic lawnmower 100 and the guiding slot 80 may be provided on the switch cap 30, and all such embodiments as may be used in the same or similar manner as the present embodiment are contemplated as falling within the scope of the present invention.

In this embodiment, preferably, one end of the guide groove 80 close to the opening and closing cap 30 is closed, one end of the guide groove 80 remote from the opening and closing cap 30 is opened, and the length of the guide groove 80 is longer than the movement stroke of the opening and closing cap 30 in the axial direction.

The guide groove 80 with one open end facilitates the installation of the guide member 82, and the length of the guide groove 80 is longer than the movement stroke of the switch cap 30 in the axial direction, so that no matter which position in the axial direction the switch cap 30 moves to, the guide member 82 can be ensured to be positioned in the guide groove 80, and guide failure is avoided.

It will be appreciated by those skilled in the art that the guide groove 80 may be closed at both ends, and that the same or similar embodiments are also contemplated as the present embodiment.

In this embodiment, the number of the guide members 82 is preferably plural, preferably four or more, and when one side edge of the switch cap 30 is pressed, the switch cap 30 rotates about an axis on the opposite side edge thereof, and the axis passes through two guide members 82 disposed adjacently on the same side, and none of the axes passes through the trigger mechanism 32. In this embodiment, the trigger mechanism 32 of the trigger 28 is located between two parallel axes.

In this embodiment, since any one of the axes does not pass through the trigger mechanism, preferably, the trigger mechanism is located between two parallel axes, and no matter which side edge of the switch cap 30 is pressed by the operator, the contact portion between the switch cap 30 and the trigger mechanism has a certain stroke in the direction toward the mounting portion 26, so that the switch cap 30 can trigger the trigger stably, and the pressing failure is prevented.

Specifically, referring to fig. 2, 6a and 6b, when the left edge of the switch cap 30 is pressed, since the right guide 82 is limited by the guide groove 80, the switch cap 30 rotates around the right X1 axis, and the fulcrum is shown as delta in fig. 6b, so that the contact position of the switch cap 30 and the trigger mechanism of the trigger (usually the central position of the switch cap 30) has a downward stroke of h1, so that the switch cap 30 can trigger the trigger stably, and the pressing failure is prevented. Similarly, when the right edge of the switch cap 30 is pressed, the switch cap 30 will rotate about the left X2 axis because the left guide 82 is limited by the guide groove 80. In the present embodiment, the X1 axis and the X2 axis are the centerlines of the guides, that is, the centerlines of the guides constitute the rotation axis of the opening and closing cap 30.

Referring to fig. 2, 6a and 6c, when the lower edge of the switch cap 30 is pressed, since the upper guide 82 is limited by the guide groove 80, the switch cap 30 rotates around the upper YI axis, and the fulcrum is shown as delta in fig. 6c, so that the contact portion of the switch cap 30 and the trigger mechanism of the trigger (usually the central position of the switch cap 30) has a downward stroke of h2, so that the switch cap 30 can trigger the trigger stably, and the pressing failure is prevented. Similarly, when the upper edge of the switch cap 30 is pressed, the switch cap 30 will rotate around the lower Y2 axis because the lower guide 82 is limited by the guide groove 80. In the present embodiment, the Y1 axis and the Y2 axis are the lines of points where the same-side guide 82 contacts the closed end of the guide groove 80, that is, the lines of points where the guide 82 contacts the closed end of the guide groove 80 constitute the axis, the guide 82 is a cylindrical pin, the closed end of the guide groove 80 is a circular arc-shaped closed end, the closed end covers the guide 82, and the Y1 axis and the Y2 axis are the lines of points where the same-side guide 82 contacts the uppermost side of the closed end of the guide groove 80.

On the contrary, referring to fig. 6d, if the guide member and the guide groove are not provided, when the left edge of the switch cap is pressed, the switch cap will rotate around the center of the lower edge thereof, the fulcrum is shown as delta in fig. 6d, the left edge is lowered while the right edge is too high, which results in insufficient downward stroke of the center of the lower edge thereof, and the trigger cannot be triggered stably and normally, thus easily causing pressing failure.

In this embodiment, the guide 82 is disposed on the side of the switch cap 30, and the outer arc between the top surface and the side of the switch cap 30 transits, and the outer arc uses the rotation axes (X1 axis, X2 axis, Y1 axis, Y2 axis) of the switch cap 30 as the center of a circle, which can ensure that the switch cap 30 is not caught by the housing of the robotic lawnmower 100 during rotation. The shell of the robot mower is provided with an inner arc corresponding to the outer arc, and the design can reduce the gap between the keys and the shell.

In this embodiment, the number of the guide members 82 is four, and the guide members 82 are divided into two groups, each group includes two guide members 82 disposed at a certain distance, and the two groups of guide members 82 are disposed on the opposite sides 50 of the switch cap 30, respectively. In this embodiment, the four guide members are cylindrical pins and are disposed parallel to each other. The structure is symmetrical and the layout is reasonable.

In this embodiment, on the plane perpendicular to the axial direction, the projections of the four guide members are respectively located on four corner points of a rectangle, and the projection of the trigger mechanism is located in the range of the rectangle, preferably, the trigger mechanism is located in the center of the rectangle, so that the switch cap can stably trigger the trigger, and press failure is prevented.

It will be appreciated by those skilled in the art that any other number of sets of guides 82 are provided, and that preferably the symmetrical arrangement of sets of guides 82 effectively guides the movement of switch cap 30. All the solutions which are the same or similar to the present embodiment are included in the protection scope of the present invention.

In the present embodiment, the description of the emergency stop switch 20 is taken as an example of the robotic lawnmower 100, and those skilled in the art will recognize that the emergency stop switch 20 may be installed as a separate component on other control objects, thereby becoming a control switch for any other product, especially a control switch for a product having a waterproof requirement for the switch, and all the embodiments that are the same as or similar to the present embodiment are included in the protection scope of the present invention.

When the scram switch 20 is mounted on another object, it is preferable that an opening for the switch cap 30 to slide in the axial direction is provided on the other object. More preferably, one of the switch cap 30 and the other object is provided with a guide groove 80 extending in an axial direction, and the other of the switch cap 30 and the other object is provided with a guide member 82 slidable in the guide groove 80 to guide sliding of the switch cap 30, prevent tilting and invalidation of pressing, and ensure effective triggering of the trigger 28.

Fig. 7 shows a scram switch 220 provided in accordance with a second embodiment of the present invention.

The main difference between the scram switch 220 of the present embodiment and the scram switch 20 of the first embodiment is that: the scram switch 220 of the present embodiment is not provided with a support plate, the support elastic member 252 is directly abutted against the switch cap 230, and in the process of triggering the trigger 228 by moving the switch cap 230 toward the mounting portion 226, the switch cap 230 is directly abutted against the trigger elastic member 256 and compresses the trigger elastic member 256, thereby triggering the trigger 228.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.

Claims (6)

1. A robot lawnmower provided with a scram switch thereon, characterized in that:

The emergency stop switch comprises a mounting part, a trigger arranged on the mounting part and a switch cap arranged opposite to the mounting part, wherein a trigger mechanism of the trigger is positioned between the switch cap and the mounting part, the opposite directions of the switch cap and the mounting part are defined as axial directions, one of the switch cap and the robot mower is provided with a guide groove extending along the axial direction, and the other one of the switch cap and the robot mower is provided with a guide piece capable of sliding in the guide groove;

One end of the guide groove close to the switch cap is closed, one end of the guide groove far away from the switch cap is opened, and the length of the guide groove is longer than the movement stroke of the switch cap in the axial direction;

The number of the guide pieces is multiple, when one side edge of the switch cap is pressed, the switch cap rotates around an axis on the other opposite side edge of the switch cap, the axis passes through two guide pieces adjacently arranged on the same side, and any axis does not pass through the trigger mechanism;

wherein the center line of the guide member constitutes the axis, or a line connecting points at which the guide member contacts the closed end of the guide groove constitutes the axis.

2. The robotic lawnmower of claim 1, wherein:

the switch cap comprises a top surface and a side surface extending from the top surface along the direction of the installation part, the guide piece is arranged on the side surface, an outer arc is transited between the top surface and the side surface, the outer arc takes the axis as the center of a circle, and an inner arc corresponding to the outer arc is arranged on the robot mower.

3. The robotic lawnmower of claim 1, wherein:

And a supporting elastic piece is arranged between the mounting part and the switch cap, a triggering elastic piece is arranged between the trigger and the switch cap, and the switch cap is compressed before the supporting elastic piece reaches the maximum stroke in the process of pressing the switch cap to move towards the mounting part.

4. A robotic lawnmower as claimed in claim 3, wherein:

the emergency stop switch further comprises a support plate which is arranged between the trigger and the switch cap and is abutted to the switch cap, and the support elastic piece is abutted to the support plate.

5. A robotic lawnmower as claimed in claim 3, wherein:

the plurality of supporting elastic pieces are distributed radially, and the triggering elastic pieces are surrounded by the plurality of supporting elastic pieces.

6. An emergency stop switch mounted on a control object to stop the operation of the control object, characterized in that:

the emergency stop switch comprises a mounting part, a trigger arranged on the mounting part and a switch cap arranged opposite to the mounting part, wherein a trigger mechanism of the trigger is positioned between the switch cap and the mounting part, the opposite directions of the switch cap and the mounting part are defined as axial directions, one of the switch cap and the control object is provided with a guide groove extending along the axial directions, and the other one of the switch cap and the control object is provided with a guide piece capable of sliding in the guide groove;

One end of the guide groove close to the switch cap is closed, one end of the guide groove far away from the switch cap is opened, and the length of the guide groove is longer than the movement stroke of the switch cap in the axial direction;

The number of the guide pieces is multiple, when one side edge of the switch cap is pressed, the switch cap rotates around an axis on the other opposite side edge of the switch cap, the axis passes through two guide pieces adjacently arranged on the same side, and any axis does not pass through the trigger mechanism;

wherein the center line of the guide member constitutes the axis, or a line connecting points at which the guide member contacts the closed end of the guide groove constitutes the axis.