CN216980403U - Switch module for electric tool and electric tool - Google Patents

Abstract

The utility model relates to a switch module (100) for a power tool, comprising: a housing (10) comprising a base wall (12) and a side wall defining an interior space (5) and comprising an attachment portion (28) for attachment to a housing (110) of an electric tool; a switch (40) housed within the interior space, including a contact (42) and capable of being electrically connected to a power source; a slide bar (20) comprising an actuating portion (212) for engaging with an actuating member (111) mounted to the housing and a triggering portion (218) configured for triggering the switch and movable relative to the housing (10) between an initial position and a working position, the triggering portion not contacting the contact in the initial position of the slide bar and biasing the contact in the working position of the slide bar; and an elastic holder (30) accommodated in the inner space for holding the slide bar at an initial position. The present application also relates to a power tool including the switch module.

Description

Switch module for electric tool and electric tool

Technical Field

The present application relates to a switch module for a power tool and a power tool including the same.

Background

A number of power tools suitable for manual operation by a user have been developed, and include a switch structure for the manual operation. For example, the switch structure mainly includes a slide lever configured to engage with an actuator or an actuator button mounted on a housing of the power tool, and a switch that is triggered when the slide lever is slid by actuation of the actuator button, wherein the slide lever triggers the switch via which the power tool is electrically connected to a power source so as to be in an energized state capable of being powered, and the slide lever does not trigger the switch to disconnect the power tool and the power source electrically connected to the switch so as to be placed in a de-energized state.

However, this switch structure is not a modular or integrated structure, and each component is individually mounted to the housing of the electric power tool, so that there are disadvantages in terms of control, mounting, and the like. On the other hand, this switch structure does not include a dust-proof structure and is exposed to the outside after being mounted on the power tool, so that dust accumulates on some constituent parts, particularly contact pieces of the switch, with the use of the power tool, and the function of the switch structure is affected. The accumulation of dust may cause an inability to ensure that the switch is turned on when the actuation button of the power tool is actuated, affecting the use of the power tool; on the other hand, the accumulation of dust may cause the power tool to be powered on accidentally, which is more dangerous.

SUMMERY OF THE UTILITY MODEL

The object of the present application is to provide an integrated, modular switch module that solves the problem of modularity of the switch structure on the one hand, so that the switch module can be applied to more types of power tools, and on the other hand, solves the problem of dust prevention of the switch structure.

This object is achieved by a switch module for a power tool as follows. The switch module includes:

a housing including a base wall and a side wall extending from a periphery of the base wall, the base wall and the side wall defining an interior space having an opening, the housing further including an attachment portion configured for attachment to a housing of the power tool;

a switch housed within the interior space, the switch including a contact and being electrically connectable to a power source;

a sliding bar comprising an actuating portion configured for engagement with an actuating member mounted to the housing and a triggering portion configured for triggering the switch, and configured to be movable relative to the housing between an initial position and a working position under the action of the actuating member, wherein the triggering portion is configured to: in the initial position of the slide lever, the contact piece of the switch is not contacted so that the electric tool is in a power-off state in which the electric connection with the power source is disconnected, and in the working position of the slide lever, the contact piece of the switch is biased so that the electric tool is placed in a power-on state in which the electric connection with the power source is possible; and

a resilient retainer received within the interior space and configured to apply a resilient biasing force to the slide bar to enable retention thereof in an initial position.

In one embodiment, the actuation portion is arranged inside or outside the inner space and/or the actuation portion is in the form of a groove, a through opening or a protrusion.

In one embodiment, the slide bar includes a bar body having a first end and an opposite second end, the actuation portion being located at the first end.

In one embodiment, the slide bar comprises an end wall extending transversely from the second end of the bar body, the trigger portion projects from at least one of the bar body and the end wall, and the trigger portion is in the form of a cylinder, or a flattened rib, or a bump.

In one embodiment, the slide bar and the housing include guide features that cooperate to guide movement of the slide bar relative to the housing between an initial position and a working position.

In one embodiment, the guide feature includes a guide protrusion formed on one of the slide bar and the housing and a guide groove formed on the other of the slide bar and the housing.

In one embodiment, the guide protrusion is a guide rib extending from at least one of the rod body, the trigger part, and the end wall of the slide lever, and the guide groove is formed on the base wall and/or the side wall of the housing.

In one embodiment, the movement of the sliding bar between the initial position and the working position is performed in a longitudinal direction in which the switch module is inserted into the housing of the power tool.

In one embodiment, the resilient retainer is a spring disposed between an end wall of the slide bar and a side wall of the housing and is configured to be further compressed by the end wall of the slide bar as the slide bar moves from the initial position to the operational position.

In one embodiment, one of the end wall of the slide bar and the side wall of the housing includes a post and the other of the end wall of the slide bar and the side wall of the housing includes a hole through which the post can pass, the spring fitting over the post.

In one embodiment, the end wall of the slide lever includes a notch portion configured to avoid physical interference with the switch when the slide lever is moved to the operating position.

In one embodiment, the attachment portions extend outwardly away from the interior space from opposite sides of the side wall in a transverse direction perpendicular to the longitudinal direction, and are provided with through holes allowing a fastener to pass therethrough.

In one embodiment, the side wall of the housing comprises a female or male portion configured for engagement with a complementary male or female portion on a housing of the power tool to position the switch module in the lateral direction relative to the housing.

In one embodiment, the housing is in the shape of a hexahedron or a barrel or a hemisphere.

According to the present application, there is also provided a power tool including: a housing; an actuator mounted to the housing; and the above-mentioned switch module configured to be mounted and attached to the housing in the longitudinal direction, the housing comprising a housing portion configured to cover an opening of the switch module.

In one embodiment, the side walls of the housing and the housing parts comprise mutually engaging female or male parts and complementary male or female parts, respectively, for positioning the switch module and the housing relative to each other in a transverse direction perpendicular to the longitudinal direction.

In one embodiment, the housing portion is configured to engage a free end of a sidewall of the housing to prevent dust from entering the interior space.

In one embodiment, the power tool is an angle grinder.

The switch module of the present application includes a housing defining an interior space having an opening, and a switch, a sliding bar and a resilient retainer housed in the interior space. The switch module of the present application is mounted and secured as a unit to the housing of the power tool, while the housing of the power tool covers the opening of the interior space in a substantially sealed manner. The integrated switch module not only solves the modularization problem and enables the switch structure to be widely applied, but also solves the problem that dust is accumulated due to the fact that parts of the switch structure are exposed outside, and enables the performance of the electric tool to be more reliable.

Drawings

The above and other advantages and features of the present application will become apparent from the following detailed description given in conjunction with the accompanying drawings. Unless specifically stated otherwise, the drawings are intended to conceptually illustrate the structures or details described, possibly including exaggerated displays. The figures are also not necessarily drawn to scale.

FIG. 1 is a perspective view of a portion of a power tool including a switch module of the present application, wherein a housing of the power tool includes an upper half and a lower half;

FIG. 2 is a perspective view of the power tool of FIG. 1 from the inside with a portion of the lower half of the housing removed;

fig. 3 is an assembled perspective view of the switch module;

fig. 4 is an assembled perspective view of the switch module from another angle;

fig. 5 is an exploded perspective view of the switch module of fig. 3;

FIG. 6 is another angled exploded perspective view of the switch module of FIG. 3;

FIG. 7 is another angled exploded perspective view of the switch module of FIG. 3; and

fig. 8 is a schematic view of the trigger portion of the sliding bar of the switch module biased against the contact of the switch.

Detailed Description

Exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. It is to be understood by persons skilled in the art that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of the present application. Directional terminology used herein is understood with reference to the drawings and changes in the orientation and state of placement of structures accordingly. Moreover, in the drawings, like reference numerals designate like parts.

The present application relates to an integrated switch module for a power tool and a power tool including the switch module. In the illustrated example, the power tool is an angle grinder. However, it should be understood by those skilled in the art that the switch module of the present application is not only applicable to an angle grinder, but also to any power tool having a manual operation function.

Fig. 1 and 2 show, in assembled perspective view, a portion of a housing 110 of an angle grinder and a switch module 100 mounted or fastened to the housing 110. The switch module 100 of the present application is configured as a single integrated, modular unit that is fastened to the housing 110 by means of fasteners 113. That is, the components that make up the switch module 100 are first assembled into a module or unit and then mounted as a unit to the housing 110, rather than the components being mounted individually to the housing 110 of the power tool. As can be seen in fig. 1, the housing 110 may be a two-piece structure including an upper half 110a and a lower half 110b, with the switch module 100 mounted on the upper half 110 a. Fig. 2 is a perspective view from the inside with the lower half 110b removed.

As can be seen in FIG. 1, an actuator 111 is mounted to the housing 110 of the angle grinder for operation by an operator, and the actuator 111 may be, but is not limited to, in the form of a slide switch as shown. The actuator 111 has an actuated position in which the angle grinder is powered via the switch module 100 when operated by an operator, and a non-actuated position in which the switch module 100 disconnects the power to the angle grinder when not operated by the operator.

As mentioned above, the switch module 100 of the present application is in the form of an integrated module as shown in FIGS. 3 and 4, i.e., the components of the switch module 100 are first assembled into a single unit and then mounted or fastened as a unit to the housing 110 of the angle grinder using fasteners 113, with fasteners 113 being shown in FIGS. 1 and 5. The direction in which the switch module 100 is mounted to the housing 110 of the angle grinder is referred to herein as the mounting direction or longitudinal direction and is identified in the figures as L.

According to the present application, the housing 10 of the switch module 100 is generally in the form of a hexahedron having an opening on at least one side or in one direction, defining an internal space 5 including an opening 7, the components of the switch module 100 being mounted in the internal space 5 of the switch module 100 either in whole (e.g., a resilient holder 30 as described below) or in part (e.g., into an adjustment lever 20 and a switch 40 as described below) (fig. 3 and 4). As shown in fig. 1 and 2, when the switch module 100 is mounted or secured to the housing 110 of the angle grinder, the housing portion 112 of the housing 110 engages the housing 10 to completely or substantially cover the entire opening 7 of the housing 10.

The shell portion 112 of the shell 110 includes a mating portion or edge 114 configured to mate with an outer periphery of the shell 110 (i.e., a free edge of a sidewall of the housing 10 described in detail below), or the mating edge 114 is shaped or contoured to substantially complementarily mate with the outer periphery of the housing 10. In this way, the switch module 100 of the present application is in mating engagement with the housing 110 of the power tool, effectively preventing external dust and the like from entering the interior space 5 of the switch module 100 housing the switch (particularly the switch 40 including the contact 42 as described below), and ensuring the functionality of the switch module 100.

The structure of the switch module 100 is described in detail below in connection with the assembled views of fig. 3 and 4 and the exploded views from different angles of fig. 5-7.

The switch module 100 of the present application includes a housing 10, an adjustment lever 20 movable between an operating position and an initial position with respect to the housing 10, a resilient holder 30 capable of holding the adjustment lever 20 in the initial position, and a switch 40 including a contact piece 42 and capable of being connected to a power source. The switch 40 is configured to be connected to a power source that powers the angle grinder, for example the power source may be an external power source, the switch 40 being connected to an external power line via a wire 41; as another example, the power source may be another power source, such as a battery, to which the switch 40 may be electrically connected.

The switch module 100 is engaged with the above-described actuating member 111 of the angle grinder via the adjusting rod 20. The adjustment lever 20 of the switch module 100 is movable between a default or initial position and an operating position in response to the actuator 111 being operated by an operator to move between an actuated position and a non-actuated position. The adjustment lever 20 of the switch module 100 is further configured to selectively engage the contact 42 of the switch 40 when moving between the initial or operating positions such that: the adjuster rod 20 in the initial position does not contact the contact 42 of the switch 40 and therefore does not activate the switch 40, thereby placing the angle grinder in a state in which the power supply is cut off or a power-off state, and the adjuster rod 20 in the operating position contacts and biases the contact 42 of the switch 40 and therefore activates the switch 40, thereby placing the angle grinder in a power-on state in which it can be electrically powered, for example, by an external power source.

The description herein of the switch module 100 will be described with reference to a mounting or insertion direction (also referred to herein as a longitudinal direction) L of the switch module 100 to the angle grinder housing 110, a transverse direction a perpendicular to the longitudinal direction L, and a thickness direction TT perpendicular to both the longitudinal direction L and the transverse direction a, as identified in fig. 1, 3, and 6.

In the illustrated embodiment, the casing 10 is generally box-shaped, having a hexahedral shape, comprising a base wall 12 extending in a plane defined by both the longitudinal direction L and the transverse direction a, and a side wall extending from at least a portion of the outer periphery of the base wall 12 (for example, from the entire outer periphery in the illustrated example), so as to define an internal space 5 having an opening 7, the opening 7 being defined by the free end or edge of the side wall. The inner space 5 is configured for receiving other components of the switch module 100, including the switch 40 and the resilient retainer 30 described above and a portion of the adjustment lever 20.

In the illustrated example in which the housing 10 is in the shape of a hexahedron, the sidewalls extending from the base wall 12 include a first sidewall 14 and a second sidewall 16 that are opposite in the longitudinal direction L, the first sidewall 14 being inserted inside the housing 110 and the second sidewall 16 abutting or engaging the mating edge 114 of the housing 110 or a portion thereof in a substantially sealed manner when the switch module 100 is mounted to the housing 110 of the angle grinder along the longitudinal direction L. The side walls extending from the base wall 12 further include third and fourth side walls 18, 22 opposite in the transverse direction a, with a pair of attachment portions 28 projecting outwardly from the third and fourth side walls 18, 22, respectively, and configured for attaching or securing the switch module 100 to a housing 110 of an angle grinder. In particular, the attachment portion 28 is in the form of a lug having any shape and comprises a through hole 23 allowing the passage of a fastener 113, the fastener 113 extending through the through hole 23 into a corresponding hole of the housing 110 to fasten the switch module 100 to a corresponding portion of the housing 110. It should be understood that the manner of securing the switch module 100 to the angle mill housing 110 is not limited to the illustrated fastener connections, but that any manner of connection known in the art, such as riveting, welding, snapping, form-fitting connections, etc., are also contemplated by the present application and may be used alone or in any combination. The attachment 28 for attaching the switch module 100 to the housing 110 of the power tool is not limited to the illustrated lug structure, as the connection is made, and the structure of the attachment 28 may be adapted according to the connection used. The two attachment portions 28 may have different outer contours or shapes as illustrated, or may have the same structure disposed symmetrically.

The adjustment lever 20 of the switch module 100 is configured to be mounted to the housing 10 and to be reciprocally movable in the longitudinal direction L with respect to the housing 10 between an initial position or a working position, or the adjustment lever 20 is slidably mounted to the housing 10.

The adjustment lever 20 comprises a rod body 210 shaped as an elongated bar, the rod body 210 having, but not limited to, a flattened cross-section, the rod body 210 may be provided as a straight rod as shown, but need not be in the form of a straight rod. The lever body 210 defines an inner surface 10a facing the base wall 12 of the housing 10 and an opposite outer surface 10b, and includes a first end 210a (shown as the end outside the interior space 5) and a second end 210b (shown as the end inside the interior space 5) opposite in the longitudinal direction L, the first end 210a being formed with an actuating portion 212 configured for engagement with an actuator 111 mounted to the housing 110 of the power tool. In the illustrated example, the actuating portion 212 is in the form of an opening extending through the rod body 210 in the thickness direction T and configured for receiving an actuating member 111 mounted to the housing 110 of the power tool in order to drive or bring the entire adjustment lever 20 in the longitudinal direction L from the initial position to the working position when the actuating member 111 is operated by an operator. The above-mentioned opening may be in the form of a through hole penetrating the rod body 210 in the thickness direction a as illustrated, and may have any possible shape. It is contemplated that actuating portion 212 is not limited to the illustrated open form, and may be in the form of a notch for engaging a notch present on actuating member 111 or a protrusion for interference engagement with actuating member 111, or may have any feasible structure that is capable of engaging a corresponding structure on actuating member 111 in any fashion. The first end 210a of the adjustment lever 20 may have a size that is enlarged in comparison with the lever body 210 in at least one of the longitudinal direction L, the transverse direction a, and the thickness direction T (e.g., in all three directions as illustrated), and may be further provided with a fabrication hole or a weight-reducing hole 213, but this is not essential.

The second end 210b of the adjustment lever 20 comprises an end wall 214 projecting from the inner surface 10a of the lever body 210 transversely to said lever body 210 (e.g. in a plane formed by the transverse direction a and the thickness direction T) and a post 216 projecting from the end wall 214 substantially in the longitudinal direction L towards the first end 210a, the post 216 may extend in the longitudinal direction L, but need not necessarily extend in the longitudinal direction L, e.g. may extend obliquely to the longitudinal direction L. The post 216 is sized and shaped to be received by a spring acting as the resilient retainer 30. Accordingly, the first side wall 14 of the housing 10 comprises a through hole 142 passing in the longitudinal direction L configured to receive the post 216 of the adjustment lever 20 to allow the adjustment lever 20 to slide in the longitudinal direction L relative to the housing 10. The post 216 need not be cylindrical in shape as illustrated and may have any other configuration.

The illustrated elastic holder 30 is a spring, but not limited to a spring, a torsion spring, a reed, and the like are also possible, and of course, the structure (e.g., the above-described column 216) that guides or restricts the deformation thereof may be appropriately modified or omitted based on the actual configuration of the elastic holder 30. The resilient retaining member 30 is configured to apply a resilient biasing force to the adjustment lever 20 to retain it in the initial position when the actuating member 111 is in the non-actuated position, i.e., not manipulated by the operator. When the operator manipulates the actuating member 111 to actuate it from the non-actuating position to the actuating position, the actuating member 111 drives the adjusting lever 20 to move from the initial position to the working position against the resilient biasing force of the resilient holding member 30 (further resiliently deforming the resilient holding member 30).

The second end 210b of the adjustment lever 20 further comprises a trigger portion 218 (fig. 7) extending from the inner surface 10a of the lever body 210, the trigger portion 218 being configured for: the switch 40 is triggered by contact and biasing of the contact 42 of the switch 40 when the adjustment lever 20 is moved to the operating position to place the angle grinder in an operating state powered (from an external power source) via the switch module 100; and when the actuating member 111 is moved back (or automatically returned when the operating force of the operator is removed) to the non-actuating position, the adjustment lever 20 is moved toward the initial position by the resilient biasing force of the resilient retaining member 30 away from contact with the contact blade 42 of the switch 40, thereby cutting off the power supply to the angle grinder. The trigger portion 218 is illustrated as being in the form of a cylinder, however, it will be appreciated by those skilled in the art that the trigger portion 218 may take any configuration that is capable of engaging and biasing the contact 42 of the switch 40 as the adjustment lever 20 is moved and is capable of moving away from such contact in the return position. The trigger portion 218 may extend from the inner surface 10a of the lever 210 as shown, may extend from the end wall 214, or may be connected to both the inner surface 10a of the lever 210 and the end wall 214.

The adjustment lever 20 and the housing 10 may further comprise cooperating guide features for guiding or restricting the sliding of the adjustment lever 20 relative to the housing 10 or restricting the movement of the adjustment lever 20 relative to the housing 10 to the longitudinal direction L. In the illustrated example, the mating guide features include guide protrusions (e.g., guide ribs as illustrated) 222 protruding from the inner surface 10a of the lever body 210 and guide grooves (e.g., guide grooves as illustrated) 144 formed on the housing 10. The illustrated guide ribs extend in the longitudinal direction L and cooperate with the guide grooves to guide the movement of the adjustment lever 20 when the adjustment lever 20 is moved relative to the housing 10. Those skilled in the art will appreciate that where this function is enabled, the guide protrusions may extend from one or more of the end wall 214, the trigger portion 218, and the inner surface 10a of the shaft 210. The guide projections may be in the form of flat ribs as shown, or may be in the form of posts or projections of any shape. It is also contemplated that the housing 10 may provide a guide protrusion and the lever body 210 may provide a guide groove. In the case where the above-described function can be achieved, the shapes and sizes of the guide ribs and the guide grooves may be modified as necessary.

As can also be seen, the end wall 214 of the adjustment lever 20 also includes a cutaway portion 226 configured to avoid physical interference with the switch 40 as the adjustment lever 20 moves from the initial position to the operating position. It is also contemplated herein that the surface 227 of the notched portion 226 may also serve as the trigger portion 218 of the contact blade 42 of the actuation switch 40 if the position and size of the switch 40 in the housing 10 is appropriate. Alternatively, the notch portion 226 may not exist.

It is also shown that the base wall 12 of the housing 10 comprises two holes 125 for fastening the switch 40 to the housing 10, and that the first side wall 14 of the housing 10 comprises a unit feature 148 for positioning the switch 40 in the transverse direction a with respect to the housing 10, for example comprising two spaced apart protruding tracks extending from the first side wall 14 into the inner space 5. The second side wall 16 of the housing 10 includes a slot 162 therein to allow the electrical cord 41 to pass therethrough. The switch 40, including the contact 42 and the wire 41, are common components in the art and will not be described in detail herein, as are means of securing the switch 40 to the housing 10. It is to be noted that the switch 40 does not have to be fastened to the base wall 12 of the housing 10, but can be fixed to any part of the housing 10 by any known means.

To better position the switch module 100 when mounted to the housing 110 of the angle grinder, the first sidewall 14 of the housing 10 includes at least one, such as a plurality of male or female portions (e.g., two notches 13 in the illustration) configured to mate with complementary female or male portions 131 of the mating edge 114 of the housing 110 of the angle grinder to achieve relative positioning therebetween.

The switch module of the present application is described in detail above in connection with an example of an angle grinder. Therefore, the switch module firstly provides the advantages of switch structure integration and modularization, so that the switch module is wider in application and stronger in universality; secondly, the function of dust prevention is realized, the reliability of the switch is improved, and the fault possibility of accidental startup or accidental shutdown caused by external dust is reduced.

Other variations on the above examples are also contemplated by those skilled in the art.

For example, in the illustrated example, the housing 10 is in the form of a hexahedron, but it should be understood by those skilled in the art that the housing 10 of the switch module 100 is not limited to the illustrated hexahedron form, and a housing such as a cylindrical hemisphere or any other irregular shape may be employed.

For example, in the illustrated example, the cross-section of the adjustment lever 20 perpendicular to the longitudinal direction L is rectangular, and it will be appreciated by those skilled in the art that the cross-section of the adjustment lever 20 may be any other regular or irregular shape. The adjustment lever 20 is not limited to the straight lever form shown in the drawings, but may have any structure as long as it can be engaged with the actuator 111 on the housing of the power tool. The feature that engages the actuator is not limited to the illustrated form of the actuation opening, and the feature may also be embodied as a protrusion, groove, depression, etc., so long as it is capable of engaging the actuator 111.

The applicant also envisages that the present principles are not limited to the case in which the actuating portion 212 is located outside the internal space 5 of the switch module 100 in correspondence with the actuating member 111 on the casing of the power tool, and that, depending on the dimensions of the switch module 100 and the position of the actuating member 111 on the casing of the power tool, the rod 210 of the adjustment lever 20 can be so short as to be completely housed inside the casing 10, in which case the actuating portion 212 may be located inside the internal space 5. The interior space 5 of the housing 10 is not limited to being open on one side only, as long as the latter is capable of substantially covering the opening defining the interior space 5 and of substantially preventing dust from entering the interior space 5 housing the contact blades 42 of the switch 40 when the switch module 100 is mounted to the housing 10 of the power tool.

Although in the illustrated example the movement of the adjustment lever 20 of the switch module 100 relative to the housing 10 is performed in the longitudinal direction L, the present application is not limited thereto and the movement direction may be changed depending on the actual position of the actuating member 111 and the installation of the switch module 100.

The illustrated examples of the present invention are described above in detail and some modifications that may be made based on the illustrated examples are listed, however, the present invention is not intended to be limited to the structures described and illustrated above. The illustrated structural details or alternative modifications of one feature of the illustrated structure may be combined with the illustrated structural details or alternative modifications of other features to form new embodiments. Various modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model.

Claims (18)

1. A switch module (100) for a power tool, comprising:

a housing (10) comprising a base wall (12) and a side wall extending from a periphery of the base wall (12), the base wall (12) and side wall defining an interior space (5) having an opening (7), the housing (10) further comprising an attachment portion (28) configured for attachment to a housing (110) of the power tool;

a switch (40) housed within the inner space (5), the switch (40) comprising a contact (42) and being electrically connectable to a power source;

a sliding bar (20) comprising an actuating portion (212) configured for engaging with an actuating member (111) mounted to the housing (110) and a triggering portion (218) configured for triggering the switch (40), and configured to be movable between an initial position and a working position with respect to the housing (10) under the action of the actuating member (111), wherein the triggering portion (218) is configured to: in the initial position of the slide lever (20) without contacting the contact (42) of the switch (40) so that the electric tool is in a power-off state in which the electrical connection with the power source is disconnected, and in the working position of the slide lever (20) biasing the contact (42) of the switch (40) so as to place the electric tool in a power-on state in which the electrical connection with the power source is possible; and

a resilient retainer (30) housed within the interior space (5) and configured to apply a resilient biasing force to the slide bar (20) to enable it to be retained in an initial position.

2. The switch module (100) of claim 1,

the actuating part (212) is arranged inside or outside the inner space (5) and/or

The actuating portion (212) is in the form of a groove, through opening or protrusion.

3. The switch module (100) of claim 2, wherein the sliding bar (20) comprises a bar body (210), the bar body (210) having a first end (210a) and an opposite second end (210b), the actuation portion (212) being located at the first end (210 a).

4. The switch module (100) of claim 3, wherein the sliding bar (20) includes an end wall (214) extending transversely from the second end (210b) of the bar body (210), the trigger (218) protrudes from at least one of the bar body and the end wall (214), and the trigger (218) is in the form of a cylinder, or a flattened rib, or a bump.

5. The switch module (100) of claim 4, wherein the sliding bar (20) and the housing (10) include guide features that cooperate to guide movement of the sliding bar (20) relative to the housing (10) between an initial position and an operating position.

6. The switch module (100) of claim 5 wherein the guide features comprise a guide tab formed on one of the slide bar (20) and the housing (10) and a guide groove formed on the other of the slide bar (20) and the housing (10).

7. The switch module (100) of claim 6, wherein the guide protrusion is a guide rib (220) extending from at least one of the lever body (210), the trigger part (218) and the end wall (214) of the sliding lever (20), and the guide groove is formed on the base wall (12) and/or the side wall of the housing (10).

8. The switch module (100) according to any one of claims 1 to 7, characterized in that the movement of the sliding lever (20) between the initial position and the working position is carried out in a longitudinal direction (L) in which the switch module (100) is inserted into a housing (110) of the power tool.

9. The switch module (100) according to any of claims 4-7, wherein the resilient retainer (30) is a spring disposed between an end wall (214) of the sliding bar (20) and a side wall of the housing (10) and is configured to be further compressed by the end wall (214) of the sliding bar (20) when the sliding bar (20) moves from an initial position to a working position.

10. The switch module (100) of claim 9, wherein one of the end wall (214) of the sliding bar (20) and a side wall of the housing (10) comprises a post and the other of the end wall (214) of the sliding bar (20) and a side wall of the housing (10) comprises a hole through which the post can pass, the spring being fitted over the post.

11. The switch module (100) according to any of claims 4-7, wherein the end wall (214) of the sliding bar (20) comprises a notch (226) configured to avoid physical interference with the switch (40) when the sliding bar (20) is moved to the operating position.

12. The switch module (100) according to claim 8, characterized in that the attachment portions (28) extend outwardly away from the interior space (5) from opposite sides of the side wall in a transverse direction (A) perpendicular to the longitudinal direction (L) and are provided with through holes (23) allowing a fastening member (113) to pass through.

13. The switch module (100) of claim 12, wherein the side wall of the housing (10) comprises a concave or convex portion configured for engagement with a complementary convex or concave portion on a housing (110) of the power tool to position the switch module (100) in the lateral direction relative to the housing (110).

14. The switch module (100) according to any of claims 1-7, characterized in that the housing (10) is hexahedral shape or barrel shape or hemispherical shape.

15. An electric power tool, characterized by comprising:

a housing (110);

an actuator (111) mounted to the housing (110); and

the switch module according to any one of claims 1-14, configured for mounting and attaching to the housing (110) in a longitudinal direction (L), the housing comprising a housing portion (112) configured for covering an opening (7) of the switch module (100).

16. The power tool according to claim 15, characterized in that the side wall of the housing (10) and the housing portion (112) comprise mutually engaging concave or convex portions and complementary convex or concave portions, respectively, for positioning the switch module (100) and the housing (110) relative to each other in a transverse direction perpendicular to the longitudinal direction.

17. The power tool according to claim 15 or 16, characterized in that the housing portion (112) is configured to engage a free end of a side wall of the housing (10) to prevent dust from entering the interior space (5).

18. The power tool of claim 15 or 16, wherein the power tool is an angle grinder.

Images