CN212303467U

CN212303467U - Switch assembly and electric tool

Info

Publication number: CN212303467U
Application number: CN202021309647.XU
Authority: CN
Inventors: 刘吉国; 孔令凯
Original assignee: Bosch Power Tools China Co Ltd
Current assignee: Bosch Power Tools China Co Ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2021-01-05
Anticipated expiration: 2030-07-07

Abstract

The application provides a switch assembly and a power tool. The switch assembly includes: an operating portion provided on the housing half portion and configured to be movable between a first position and a second position; a transmission lever installed between the first bracket and the second bracket extending from the housing half and configured to be rotated about a rotation axis by the operation portion; an elastic member having a first end attached to the transmission lever and a second end attached to one of the first bracket and the second bracket; and a signal switch configured to contact the actuating lever and to be selectively pressed by the actuating lever. The switch assembly and the electric tool have the advantages of simplicity, reliability, easiness in implementation, convenience in use and the like, so that the flexibility and the comfort of operation of the electric tool are improved, and the user experience is improved.

Description

Switch assembly and electric tool

Technical Field

The present application relates to the field of power tool construction. More particularly, the present application relates to a switch assembly that aims to provide an improved operating experience. The application also relates to an electric tool comprising the switch assembly.

Background

A number of power tools have been developed that are adapted to be hand-held by a user. The electric power tool is typically provided with an operation portion controlled by a user. The operating portion may be of a movable type or a press type, and is connected to a switch located in the power tool by a mechanical structure. During operation, the position of the operating portion can affect the operation of the power tool.

SUMMERY OF THE UTILITY MODEL

It is an object of an aspect of the present application to provide a switch assembly which aims to provide automatic resetting of an operating part. It is an object of another aspect of the present application to provide a power tool including the above switch assembly.

The purpose of the application is realized by the following technical scheme:

a switch assembly, comprising:

an operating portion mounted on the housing half and configured to be movable between a first position and a second position;

a transmission lever installed between the first bracket and the second bracket extending from the housing half and configured to be rotated about a rotation axis by the operation portion;

an elastic member having a first end attached to the transmission lever and a second end attached to one of the first bracket and the second bracket; and

and a signal switch configured to contact the actuating lever and to be selectively pressed by the actuating lever.

In the above switch assembly, optionally, the axis is oriented parallel to the joining surfaces of the housing halves.

In the above switch assembly, optionally, the operating part is attached to the transmission lever by an adjusting lever.

In the above switch assembly, optionally, the elastic member is positioned such that: when the operating portion is in the first position, the elastic member is in a released state or a deformed state, and when the operating portion is in the second position, the elastic member is in a deformed state.

In the above switch assembly, optionally, the signal switch is positioned such that: when the operation part is in the first position, the signal switch is in a released state, and when the operation part is in the second position, the signal switch is in a pressed state.

In the above switch assembly, optionally, the elastic member comprises a spring, a torsion spring, or a reed.

In the above switch assembly, optionally, the elastic member is configured as a spring extending along the axis.

In the above switch assembly, optionally, the transmission lever includes a lever rib, and the first end of the elastic member is caught at the lever rib.

A power tool, comprising:

a housing comprised of at least two housing halves;

an electric drive mounted inside the housing;

a transmission mechanism housed inside the housing and actuated by the electric drive; and

in the above switch assembly, the operation portion is mounted on the outside of the housing, and the signal switch is electrically connected to the electric driver.

In the above power tool, optionally, the power tool includes an angle grinder.

The switch assembly and the electric tool have the advantages of simplicity, reliability, easiness in implementation, convenience in use and the like, so that the flexibility and the comfort of operation of the electric tool are improved, and the user experience is improved.

Drawings

The present application will now be described in further detail with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will appreciate that the drawings are designed solely for the purposes of illustrating preferred embodiments and that, accordingly, should not be taken as limiting the scope of the present application. Furthermore, unless specifically stated otherwise, the drawings are intended to be conceptual in nature or configuration of the depicted objects and may contain exaggerated displays. The figures are also not necessarily drawn to scale.

FIG. 1 is a perspective view of a portion of one embodiment of a power tool of the present application.

Fig. 2 is a side cross-sectional view of the embodiment shown in fig. 1.

Fig. 3 is a partial enlarged view of the embodiment shown in fig. 2.

Fig. 4 is an enlarged partial view of the embodiment of fig. 1 in a first position.

FIG. 5 is an enlarged partial view of the embodiment of FIG. 1 in a second position.

Detailed Description

Hereinafter, preferred embodiments of the present application will be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that the descriptions are illustrative only, exemplary, and should not be construed as limiting the scope of the application.

First, it should be noted that the terms top, bottom, upward, downward, and the like as used herein are defined with respect to the orientation in the drawings. These orientations are relative concepts and will therefore vary depending on the position and state in which they are located. These and other directional terms are not to be construed in a limiting sense.

Furthermore, it should also be noted that for any single technical feature described or implicit in the embodiments herein or shown or implicit in the drawings, these technical features (or their equivalents) can be continuously combined to obtain other embodiments not directly mentioned herein.

It should be noted that in different drawings, the same reference numerals indicate the same or substantially the same components.

Fig. 1 is a perspective view of a portion of one embodiment of the power tool of the present application, and fig. 2 is a side cross-sectional view of the embodiment shown in fig. 1. A switch assembly according to one embodiment of the present application includes: an operating part 110, an adjusting lever 111, a transmission lever 120, an elastic member 130, and a signal switch 140, which are installed to be fixed with respect to a case half 210.

The operating portion 110 may be provided on the outer shell of the case half 210 and configured to be operated by a user. For example, the operating part 110 may be movable between a first position and a second position. Fig. 1 shows a state of the operation portion 110 in the first position, and fig. 2 shows a state of the operation portion 110 in the second position.

The adjustment lever 111 is connected between the operation part 110 and the transmission lever 120. For example, one end of the adjustment lever 111 may be fixed with respect to the driving lever 120, and the other end of the adjustment lever 111 may be provided with a slot, so that a portion of the driving lever 120 may pass through the slot, and the movement of the adjustment lever 111 may bring the driving lever 120.

The actuating lever 120 may be configured to rotate along the axis a, and the actuating lever 120 is installed between the first bracket 221 and the second bracket 222. First bracket 221 and second bracket 222 extend from housing half 210, respectively. In one embodiment, the first bracket 221 and the second bracket 222 may be configured to be integral with the housing half 210. The first bracket 221 and the second bracket 222 may also be configured such that the axis a of the actuating lever 120 is oriented parallel to the mating surfaces of the housing halves 210. The coupling surfaces of the case half 210 refer to planes on which the mounting parts of both sides of the case half 210 are located in fig. 1. In one embodiment, two housing halves may be used to assemble a housing that forms a generally circular cross-section. The joining surfaces of the shell halves therefore refer in this case to the planes in which the lines on both sides of the shell halves lie. In one embodiment, the axis A may be located in the space enclosed by the shell halves 210 and the joint surfaces. In another embodiment, the axis A may be located outside the space enclosed by the shell halves 210 and the joint surfaces. The orientation of the axis a is such that the actuating lever 120 does not interfere with the assembly of the housing halves, thereby facilitating the assembly efficiency of the power tool.

As shown in fig. 2, the upper end of the actuating lever 120 is in contact with the adjusting lever 111, and the lower end of the actuating lever 120 is in contact with the signal switch 140. The axis a is located between the upper and lower ends of the actuating lever 120.

The elastic member 130 may be attached between the actuating lever 120 and one of the first bracket 221 and the second bracket 222. In the illustrated embodiment, the resilient member 130 has a first end 131 and a second end 132. The first end 131 is in contact with the actuating lever 120 and the second end 132 is in contact with the second bracket 222. As shown in fig. 2, the elastic member 130 may be configured as a spring extending along the axis a. In one embodiment, the resilient member may also be a leaf or torsion spring of any suitable configuration. The elastic member 130 may have a released state and a deformed state. The released state means that the elastic member 130 is not applied with an external force and has a naturally formed shape. The deformed state refers to the elastic member 130 being deformed by an external force, the deformation causing elastic potential energy to be stored in the elastic member 130, so that the elastic member 130 tends to return to the released state, and thus the elastic potential energy may be released to other members contacting the elastic member 130 in the form of elastic force.

The signal switch 140 is an electronic switch (as opposed to a mechanical switch) and may be associated with a control circuit not shown. In the state shown in fig. 1, the signal switch 140 is not pressed (also referred to as in the released state), and one end of the transmission lever 120 is rested on the signal switch 140. In the state shown in fig. 2, the signal switch 140 has been pressed (also referred to as being in a pressed state), and one end of the transmission lever 120 is rotated and applied with force toward the signal switch 140. In the depressed state, the signal switch itself is typically insufficient to provide sufficient resiliency to actuate the reset of the actuator lever 120 and associated components.

Fig. 3 is a partial enlarged view of the embodiment shown in fig. 2. The operating part 110 is in the first position, and thus the actuating lever 120 is not pressed toward the signal switch 140. As shown in the drawing, a line from the axis a to a position where the actuating lever 120 contacts the signal switch 140 is a ray B1, and a line from the axis a to a position where the actuating lever 120 contacts the adjustment lever 111 is a ray B2. Ray B1 forms a predetermined angle with ray B2. In one embodiment, the predetermined angle is between 130 and 175 degrees. In another embodiment, the predetermined angle is about 160 degrees.

FIG. 4 is an enlarged partial view of the embodiment shown in FIG. 1 in a first position, and FIG. 5 is an enlarged partial view of the embodiment shown in FIG. 1 in a second position. As shown, the lever rib 121 is provided on the actuating lever 120, and the first end 131 of the elastic member 130 is snapped at the lever rib 121.

In the state shown in fig. 4, the operating part 110 is located at the first position, and the elastic member 130 may be in a released state or a deformed state such that the actuating lever 120 does not apply force to the signal switch 140. The signal switch 140 is thus in the released state. In the state shown in fig. 5, the operating portion 110 is located at the second position, and the elastic member 130 is in a deformed state. At this time, the elastic member 130 has deviated from its unstressed released state and entered a deformed state. Elastic potential energy is accumulated in the elastic member 130, and the elastic potential energy tends to return the entire switch assembly to the state shown in fig. 4. For example, when the user has not started to operate the operation part 110, the switch assembly is in the state shown in fig. 4, the operation part 110 is at the first position and the signal switch 140 is in the released state. At this time, the switch 140 does not emit any electrical signal. When the user operates the operating part 110 such that the operating part 110 moves from the first position to the second position, the switch assembly transitions to the state shown in fig. 5, and the signal switch 140 is pressed by the transmission lever 120 and in a pressed state. At this point, the signal switch 140 will send an electrical signal and the control system associated with the signal switch 140 will receive the signal. For example, a signal switch may be electrically associated with the control circuit and issue an electrical signal when the signal switch is in a depressed state. The control circuit will perform other operations after receiving the electrical signal, such as activating an electric drive in the power tool, etc. When the user releases the operating part 110, the switch assembly will tend to return to the state shown in fig. 4 under the driving of the elastic member 130, and the operating part 110 will tend to return to the first position from the second position.

The switch assembly can provide automatic reset of the switch assembly, so that the operation experience of a user is favorably improved, and the operation efficiency is improved.

The present application also provides an electric tool, which includes: an electric drive, a transmission system associated with the electric drive, a control circuit associated with the electric drive, and a switch assembly according to the above description. Wherein the signal switch 140 in the switch assembly may be associated with a control circuit. The above-mentioned individual components can be arranged inside a housing, which can for example consist of two or more housing halves. Wherein at least one housing half is provided with a switch assembly according to the above description.

In one embodiment of the present application, the power tool is an angle grinder. However, the present application is not limited to a particular type of power tool, and the switch assembly according to the present application may be provided in any suitable type of power tool.

This written description discloses the application with reference to the drawings, and also enables one skilled in the art to practice the application, including making and using any devices or systems, selecting appropriate materials, and using any incorporated methods. The scope of the present application is defined by the claims and encompasses other examples that occur to those skilled in the art. Such other examples are to be considered within the scope of protection defined by the claims of this application, provided that they include structural elements that do not differ from the literal language of the claims, or that they include equivalent structural elements with insubstantial differences from the literal language of the claims.

Claims

1. A switch assembly, comprising:

an operating portion (110) mounted on the housing half (210) and configured to be movable between a first position and a second position;

a transmission lever (120) interposed between a first bracket (221) and a second bracket (222) extending from the housing half (210), and configured to be rotated about a rotation axis (a) by the operation portion (110);

an elastic member (130) having a first end (131) attached to the transmission lever (120) and a second end (132) attached to one of the first bracket (221) and the second bracket (222); and

a signal switch (140) configured to contact the actuating lever (120) and to be selectively depressed by the actuating lever (120).

2. The switch assembly according to claim 1, characterized in that said axis (a) is oriented parallel to the joining faces of said casing halves (210).

3. The switch assembly according to claim 1, characterized in that the operating part (110) is attached to the transmission lever (120) by an adjusting lever (111).

4. The switch assembly according to claim 1, characterized in that the resilient member (130) is positioned such that: the elastic member (130) is in a released state or a deformed state when the operation portion (110) is in the first position, and the elastic member (130) is in a deformed state when the operation portion (110) is in the second position.

5. The switch assembly of claim 4, wherein the signal switch (140) is positioned such that: when the operation portion (110) is in the first position, the signal switch (140) is in a released state, and when the operation portion (110) is in the second position, the signal switch (140) is in a pressed state.

6. The switch assembly of claim 1, wherein the resilient member (130) comprises a spring, a torsion spring, or a reed.

7. The switch assembly according to claim 1, characterized in that the resilient member (130) is configured as a spring extending along the axis (a).

8. The switch assembly according to claim 1, characterized in that the transmission lever (120) comprises a lever rib (121) and the first end (131) of the elastic member (130) is snapped at the lever rib (121).

9. An electric power tool, characterized by comprising:

a housing comprised of at least two housing halves;

an electric drive mounted inside the housing;

the switch assembly according to any one of claims 1-8, wherein the operating portion (110) is mounted outside the housing and the signal switch (140) is electrically connected with the electric drive.

10. The power tool of claim 9, wherein the power tool comprises an angle grinder.