CN220373194U - Power lifting device and handheld electric tool - Google Patents

Abstract

The application relates to a power lifting device and a handheld electric tool. Comprising the following steps: the push switch comprises a fixed part and a movable part, and the movable part can move relative to the fixed part under the action of a push force; a pressing force detector configured to detect a pressing force received by the movable portion of the pressing switch; the power lifting trigger is triggered under the condition that the pressing switch is in an on state and the pressing force born by the pressing switch exceeds a preset threshold value; the power boost trigger is triggered and the power boost device releases the power limit of the hand-held power tool in operation. The power lifting device and the handheld electric tool can be used for more conveniently and rapidly improving the acquisition performance.

Description

Power lifting device and handheld electric tool

Technical Field

The present disclosure relates to the field of electric tools, and more particularly to a power boosting device and a hand-held electric tool.

Background

Compared with other power tools, the electric tool has the characteristic of more environmental protection. At present, many electric tools have a turbo function, namely, a turbo function key is pressed, a performance improvement function is started, and better power output of the whole machine can be obtained under the function. However, the current scheme often needs to set a turbo key, and in actual work, the operation is inconvenient. For example, when an electric drill is used for drilling, a wood knot is encountered, a blower encounters stubborn dirt, better power output is required to be obtained in a short time, but an operator holds the tool with full force, and pressing a turbo key is inconvenient.

Disclosure of Invention

In view of the above, an embodiment of the present application provides a power lifting device and a handheld electric tool for solving at least one of the problems in the background art.

In order to achieve the above purpose, the technical scheme of the application is realized as follows:

in a first aspect, an embodiment of the present application provides a power boost device, including:

the push switch comprises a fixed part and a movable part, and the movable part can move relative to the fixed part under the action of a push force;

a pressing force detector configured to detect a pressing force received by a movable portion of the pressing switch;

the power lifting trigger is triggered under the condition that the pressing switch is in an on state and the pressing force born by the pressing switch exceeds a preset threshold value; the power boost trigger is triggered and the power boost device releases the power limit of the hand-held power tool in operation.

Optionally, the pressing force detector includes a detection end, and the detection end is connected with the movable part; the pressing force detector obtains a pressing force according to movement of a movable portion of the pressing switch.

Optionally, the detection end includes a dowel bar that receives movement of the movable portion to generate movement.

Optionally, the pressing force detector further includes a pressure sensor located at the other end of the pressing force detector opposite to the detection end; the pressure sensor obtains a pressing force according to the movement of the dowel bar.

Optionally, the pressure sensor includes a strain element and a detection element; the strain piece generates deformation under the movement of the dowel bar, and the detection piece detects the deformation of the strain piece to obtain a pressing force.

Optionally, the power boost device further comprises:

the indicating lamp is configured to display different types of lamplight according to the state of the power lifting trigger; the indicator lamp is arranged on the press switch or the distance between the indicator lamp and the press switch is smaller than a preset value.

Optionally, the power boost device further comprises:

the sound prompter is configured to send out different types of prompt sounds according to the state of the power lifting trigger.

Optionally, the voice prompter is a voice prompter.

Optionally, the power boost device further comprises:

and the display is configured to display different indication pictures according to the state of the power lifting trigger.

In a second aspect, embodiments of the present application provide a hand-held power tool, comprising:

any of the power boost devices described above.

The embodiment of the application provides a power hoisting device and handheld electric tool, includes: the push switch comprises a fixed part and a movable part, and the movable part can move relative to the fixed part under the action of a push force; a pressing force detector configured to detect a pressing force received by a movable portion of the pressing switch; the power lifting trigger is triggered under the condition that the pressing switch is in an on state and the pressing force born by the pressing switch exceeds a preset threshold value; the power boost trigger is triggered and the power boost device releases the power limit of the hand-held power tool in operation. The power lifting trigger is triggered under the condition that the pressing force exceeds a preset threshold value by arranging the pressing force detector, so that the power limit of the handheld electric tool in operation is relieved, and the performance can be conveniently and rapidly improved. Therefore, the power lifting device and the handheld electric tool provided by the embodiment of the application can be used for more conveniently and rapidly improving the performance.

Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic diagram of a structure related to a power boost device in a handheld power tool according to an embodiment of the present application;

fig. 2 is a schematic diagram of a circuit structure related to a power boost device in a handheld electric tool according to an embodiment of the present application.

Reference numerals illustrate:

10. pressing the switch; 20. a pressing force detector; 21. a dowel bar; 22. a pressure sensor; 30. a housing; 41. an indicator light; 42. an acoustic reminder; 43. a display; 50. a micro control unit; 60. a motor; 70. a current detector; 80. and a power supply.

Detailed Description

In order to make the technical solution and the beneficial effects of the present application more obvious and understandable, the following detailed description is given by way of example only. Wherein the drawings are not necessarily to scale, and wherein local features may be exaggerated or reduced to more clearly show details of the local features; unless defined otherwise, technical and scientific terms used herein have the same meaning as technical and scientific terms in the technical field to which this application belongs.

In the description of the present application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in simplifying the description of the present application, and do not indicate that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, i.e., should not be construed as limiting the present application.

In this application, the terms "first", "second" and "second" are used for clarity only and are not to be construed as relative importance of the features indicated or the number of technical features indicated. Thus, a feature defining "first", "second" may explicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc.; "plurality" means at least one, such as one, two, three, etc.; unless otherwise specifically defined.

In this application, the terms "mounted," "connected," "secured," "disposed," and the like are to be construed broadly, unless otherwise specifically limited. For example, "connected" may be either fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, or can be communicated between two elements or the interaction relationship between the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly defined otherwise, a first feature "on", "above", "over" and "above", "below", "under" or "beneath" a second feature may be a direct contact between the first feature and the second feature, or an indirect contact between the first feature and the second feature via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the level of the first feature is higher than the level of the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the level of the first feature is less than the level of the second feature.

For a thorough understanding of the present application, detailed steps and detailed structures will be presented in the following description in order to illustrate the technical aspects of the present application. Preferred embodiments of the present application are described in detail below, however, the present application may have other implementations in addition to these detailed descriptions.

To the technical problem in the prior art, the embodiment of the present application provides a power lifting device, which is applied to a handheld electric tool, as shown in fig. 1, and the power lifting device includes:

the push switch 10 includes a fixed part and a movable part, the movable part can move relative to the fixed part under the action of a push force;

a pressing force detector 20 configured to detect a pressing force received by the pressing switch 10;

a power boost trigger, which is triggered when the push switch 10 is in an on state and the push force born by the push switch 10 exceeds a preset threshold value; the power boost trigger is triggered and the power boost device releases the power limit of the hand-held power tool in operation.

It should be noted that, the hand-held electric tool shown in fig. 1 is a blower. It will be appreciated that the power boost device of the present embodiment may also be used with other hand held power tools.

It will be appreciated that the fixed portion of the push switch 10 may be fixed to the housing 30 of the hand held power tool and the movable portion may be movable relative to the fixed portion to open or close the switch.

It will be appreciated that for greater safety, the arrangement of the push switch 10 is such that: when the hand-held electric tool works, the hand presses the movable part until the switch is turned on, and then the movable part is continuously pressed, so that the position of the movable part is maintained to keep the continuous work of the hand-held electric tool; once the hand is disengaged from the pressing movable portion, the pressing switch 10 is turned off, and the hand-held power tool stops operating.

It will be appreciated that the force required to turn on the push switch 10 and maintain the position of the movable portion need not be great to save the physical effort of the operator.

It will be appreciated that the power of the hand-held power tool may be limited to 80% of maximum power during normal operation, which may save power and extend the life of the hand-held power tool. If in actual operation, a situation is encountered in which further improvement of performance is required. For example, when an electric drill is used for drilling, wood knots are encountered, and the blower encounters intractable dirt and other conditions, the turbo function can be started, namely, the power limit of the handheld electric tool in work is released, and the handheld electric tool can be better adapted to specific working conditions.

In this embodiment, the power limitation of the hand-held power tool in operation is released, and the pressing force of the pressing switch 10, that is, the pressing force of the pressing movable portion, may be increased. The pressing force detector 20 may detect a pressing force, and when the pressing force borne by the pressing switch 10 exceeds a preset threshold, the power lifting trigger is triggered, so as to release the power limitation of the handheld electric tool in operation.

According to the power lifting device, the pressing force detector 20 is arranged, under the condition that the pressing force exceeds the preset threshold value, the power lifting trigger is triggered, and therefore the power limit of the handheld electric tool in operation is relieved, and the performance lifting can be achieved conveniently and rapidly.

In some embodiments, the pressing force detector 20 includes a detection end connected to the movable portion; the pressing force detector 20 obtains a pressing force according to the movement of the movable part of the pressing switch 10.

It will be appreciated that the movement of the movable portion will act on the sensing end, the greater the distance moved, the greater the force generated. Therefore, the pressing force detector 20 can obtain the pressing force according to the movement of the movable portion of the pressing switch 10. Thus, the structure is simple, and the detection is accurate.

In some embodiments, the detection end includes a dowel 21, and the dowel 21 receives movement of the movable portion to generate movement.

In this way, the pressing force detector 20 and the pressing switch 10 are spaced apart from each other by a predetermined distance in the direction of application of the pressing force, which facilitates the mounting of the pressing force detector 20, and also reduces interference of the pressing force detector 20 with the pressing switch 10.

In some embodiments, the compression force detector 20 further includes a pressure sensor 22, the pressure sensor 22 being located at the other end of the compression force detector 20 opposite the detection end; the pressure sensor 22 obtains a pressing force according to the movement of the force transmission lever 21.

The pressure sensor 22 can more accurately detect the pressing force transmitted through the dowel bar 21. The greater the distance traveled by the dowel bar 21, the greater the pressing force detected by the pressure sensor 22.

In some embodiments, the pressure sensor 22 includes a strain element and a sensing element; the strain element deforms under the movement of the force transmission rod 21, and the detection element detects the deformation of the strain element to obtain a pressing force.

In particular, the strain element may be an elastic element, which is elastically deformed by the movement of the force transmission rod 21, the pressing force being determined according to the degree of elastic deformation. The greater the elastic deformation, the greater the pressing force. It will be appreciated that the force transfer rod 21 abuts against the strain element of the pressure sensor 22, and after the force transfer rod 21 moves under the action of the pressing force, the strain element is pressed by the force transfer rod 21 to deform, and the greater the distance the force transfer rod 21 moves, the greater the pressing force applied to the strain element, and the more serious the deformation.

In some embodiments, the power boost device further comprises:

an indicator light 41 configured to display different types of lights according to the state of the power boost trigger; the indicator lamp 41 is mounted on the push switch 10, or the distance from the push switch 10 is smaller than a preset value.

In this way, when the user needs to increase the power of the hand-held power tool, that is, when the "turbo" function is used, the user can know in time whether the "turbo" function is turned on or not to save the physical power when the pressing force of the pressing switch 10 is increased. And in the working process, the current working process is known whether the turbo function is started or not through observation at any time. The preset value is a relatively small value so as to be closer to the push switch 10, which may be in particular 5mm-10mm. The circuitry associated with indicator light 41 is shown in fig. 2.

In some embodiments, the power boost device further comprises:

the audible prompts 42 are configured to emit different types of prompts depending on the state of the power boost trigger.

Specifically, the sound may be emitted at the instant when the "turbo" function is turned on to indicate that the turn-on is successful, or the sound may be emitted after the "turbo" function is turned on, exiting the "turbo" function. For example, the opening is a one-sound beep and the exiting is a two-sound beep. The method can also intermittently send out corresponding sound to prompt the user of the current function in the working process of continuously using the turbo function. For example, turning on the "turbo" function, and intermittently emitting a beep. The circuitry associated with the audible prompts 42, see fig. 2.

In some embodiments, the audible prompts 42 are voice prompts.

To better alert the user, the voice prompter 42 may also emit voice, such as "turn on turbo function", "exit turbo function", etc., in addition to beep, etc.

In some embodiments, the power boost device further comprises:

and a display 43 configured to display different indication pictures according to the state of the power boost trigger.

The current function can be more intuitively known by the display 43.

Specifically, the display 43 may be mounted at a location that is convenient for the user to view, but does not affect the user's grip, and is not particularly limited.

Further, the display 43 displays the current function in addition to the current function. Other more content may also be displayed, such as displaying the detected pressing force, displaying the current pressing force preset threshold value, etc. Even the duration of turning on the turbo function, etc. can be displayed. The user can intuitively know various parameters of the power lifting device in the working process. The circuitry associated with display 43, see fig. 2.

It will be appreciated that the power boost trigger may be a control component of the overall hand held power tool, and that the power boost trigger may determine whether to turn on the "turbo" function based on the magnitude of the pressing force.

Specifically, the power boost trigger may be a micro control unit 50 (Microcontroller Unit; MCU), also called a single-chip microcomputer (Single Chip Microcomputer) or a single-chip microcomputer, which is configured to properly reduce the frequency and specification of a central processing unit (Central Process Unit; CPU), and integrate peripheral interfaces such as a memory (memory), a counter (Timer), a universal serial bus (Universal Serial Bus, USB), an analog-to-digital (a/D) conversion, a universal asynchronous Transmitter (Universal Asynchronous Receiver/Transmitter, UART), a programmable logic controller (Programmable Logic Controller, PLC), a direct memory access (Direct Memory Access, DMA), and even a liquid crystal display (Liquid Crystal Display, LCD) driving circuit on a single chip to form a chip-level computer for performing different combination control for different application occasions. Such as cell phones, personal computer (Personal Computer, PC) peripherals, remote controls, to automotive electronics, industrial stepper motors, robotic arm control, etc., can see the shadow of the MCU.

More specifically, the micro control unit 50 may include 13 input/output terminals, 6 of which are electrically connected to the motor 60, and the other are respectively connected to the current detector 70, the pressing force detector 20, the indication lamp 41, the sound indicator 42, the display 43, the pressing switch 10, and the power supply 80. In this way, the micro control unit 50 can determine whether to activate the turbo function, i.e., release the power restriction, according to the pressing force detected by the pressing force detector 20. The indication lamp 41, the sound indicator 42, the display 43, etc. may also be controlled according to the activation of the turbo function, which will not be described in detail herein.

Specifically, the motor 60 is the primary power component of the hand-held power tool.

Specifically, the current detector 70 is used to detect the load current of the motor 60 to determine the load condition. In some cases, if the current detector 70 detects that the load current is large, the turbo function may be automatically started.

The embodiment of the application also provides a handheld electric tool, which comprises:

any of the power boost devices described above.

According to the handheld electric tool, the pressing force detector 20 is arranged, under the condition that the pressing force exceeds the preset threshold value, the power lifting trigger is triggered, and therefore the power limit of the handheld electric tool in operation is relieved, and performance lifting can be achieved conveniently and rapidly.

It should be understood that the above examples are illustrative and are not intended to encompass all possible implementations encompassed by the claims. Various modifications and changes may be made in the above embodiments without departing from the scope of the disclosure. Likewise, the various features of the above embodiments may be combined arbitrarily to form further embodiments of the application that may not be explicitly described. Thus, the above examples merely represent several embodiments of the present application and do not limit the scope of protection of the patent of the present application.

Claims (10)

1. A power boost device for a hand-held power tool, comprising:

the push switch comprises a fixed part and a movable part, and the movable part can move relative to the fixed part under the action of a push force;

a pressing force detector configured to detect a pressing force received by a movable portion of the pressing switch;

the power lifting trigger is triggered under the condition that the pressing switch is in an on state and the pressing force born by the pressing switch exceeds a preset threshold value; and under the condition that the power lifting trigger is triggered, the power lifting device releases the power limitation of the handheld electric tool in operation.

2. The power lifting device of claim 1, wherein the pressing force detector includes a detection end connected to the movable portion; the pressing force detector obtains a pressing force according to movement of a movable portion of the pressing switch.

3. The power lifting device of claim 2, wherein the sensing end includes a dowel bar that receives movement of the movable portion to produce movement.

4. The power boost device of claim 3 wherein said compression force detector further comprises a pressure sensor located at the other end of said compression force detector opposite said detection end; the pressure sensor obtains a pressing force according to the movement of the dowel bar.

5. The power boost device of claim 4 wherein said pressure sensor includes a strain element and a sensing element; the strain piece generates deformation under the movement of the dowel bar, and the detection piece detects the deformation of the strain piece to obtain a pressing force.

6. The power boost device of claim 1, wherein the power boost device further comprises:

the indicating lamp is configured to display different types of lamplight according to the state of the power lifting trigger; the indicator lamp is arranged on the press switch or the distance between the indicator lamp and the press switch is smaller than a preset value.

7. The power boost device of claim 1, wherein the power boost device further comprises:

the sound prompter is configured to send out different types of prompt sounds according to the state of the power lifting trigger.

8. The power boost device of claim 7 wherein the audible prompts are voice prompts.

9. The power boost device of claim 1, wherein the power boost device further comprises:

and the display is configured to display different indication pictures according to the state of the power lifting trigger.

10. A hand-held power tool, comprising:

the power boost device of any one of claims 1-9.