Milk foam rod main machine, handheld kitchen stirring rod and control method of handheld kitchen stirring rod

Abstract

The invention relates to a milk foam rod main machine, a handheld kitchen stirring rod and a control method of the handheld kitchen stirring rod. The milk foam bar main machine comprises a main machine shell which is held by an operator; the driving unit is arranged on the main machine shell, and the driving unit is used for driving a stirring assembly connected to the milk foam rod main machine to rotate; the control unit is used for controlling the rotating speed of the driving unit, and the control unit comprises an adjusting assembly; the control part is arranged on the main machine shell, and the electrical parameters of the adjusting assembly are changed when the control part moves; the control piece is provided with a first stroke section corresponding to the stop of the driving unit and a second stroke section corresponding to at least two non-zero rotating speeds of the driving unit on the movement stroke; wherein the proportion of the first stroke section to the sum of the first stroke section and the second stroke section is larger than or equal to 5%. The problem that handheld kitchen stirring rods such as milk foam rods are inconvenient to control and operate is mainly solved.

Description

Technical Field

[0001] The invention relates to a milk frothing stick host, a handheld kitchen stirring stick and a control method of the handheld kitchen stirring stick. Background Art

[0002] A milk frothing wand is a household appliance specifically used for making milk froth. It can stir milk into delicate milk froth through the rapid rotation of the milk frothing head, adding rich taste and visual effects to drinks such as coffee, latte, cappuccino, etc.

[0003] The operation of existing milk frothing wands is often controlled by switches. Some milk frothing wands have only start and stop functions, and can only achieve one speed after the switch is turned on. In some usage scenarios, the milk frothing wand needs to have different speeds, and some switches will set several speed gears, and each press can achieve a speed adjustment of one gear.

[0004] The current on-off operation of the milk frothing wand is inconvenient to operate, and different speed controls cannot be conveniently implemented. Summary of the invention

[0005] The main technical problem solved by the present invention is the inconvenience in controlling and operating handheld kitchen stirring sticks such as milk frothing sticks.

[0006] In a first aspect, a milk froth wand host is provided in an embodiment.

[0007] A milk foam stick host, comprising:

[0008] The mainframe housing is for the operator to hold;

[0009] A driving unit, the driving unit is arranged on the main body housing, and the driving unit is used to drive the stirring component connected to the milk frothing wand main body to rotate;

[0010] A control unit, used to control the rotation speed of the driving unit, the control unit comprising an adjustment component;

[0011] and a control member, the control member being disposed on the main body housing, the control member changing the electrical parameters of the adjustment assembly when in motion, the control member having a first stroke section corresponding to the stop of the drive unit and a second stroke section corresponding to at least two non-zero rotational speeds of the drive unit in the motion stroke;

[0012] The proportion of the first stroke segment to the sum of the first stroke segment and the second stroke segment is greater than or equal to 5%.

[0013] In one embodiment, the adjustment component includes an adjustment element and an adjustment part, wherein the adjustment part is used to change the electrical parameters of the adjustment element during movement; and the control unit is used to control the rotation state of the driving unit according to the change of the electrical parameters.

[0014] In one embodiment, the operating member is arranged on the main body housing to move along a straight line, and a transmission structure is provided between the operating member and the adjustment part, and the transmission structure is used to drive the adjustment part to move when the operating member moves.

[0015] In one embodiment, the transmission structure includes a movable part, and the milk foam wand host includes a guide seat arranged in the host shell, the movable part is arranged on the guide seat along a straight line, and the moving direction is parallel to the moving direction of the operating part; a card groove is provided on the outer peripheral surface of the movable part, and the card groove has a first groove side wall and a second groove side wall arranged at intervals along the moving direction of the movable part, and the adjusting part is embedded in the card groove to move back and forth with the movable part.

[0016] In one embodiment, a slide groove extending along the moving direction of the movable part is provided on the side surface of the movable part, and a protrusion embedded in the slide groove is provided on the guide seat, and the protrusion is used to limit the rotation of the movable part.

[0017] In one embodiment, the control member is a button, the main body shell has a first end and a second end, the arrangement direction of the first end and the second end is parallel to the rotation axis of the drive unit, the first end is used to connect the stirring assembly, the button is arranged at the second end, and the pressing direction of the button is parallel to the rotation axis of the drive unit.

[0018] In one embodiment, the adjusting component is a variable resistance element, which is used to generate resistance changes when the adjusting part moves.

[0019] In a second aspect, an embodiment provides a handheld kitchen stirring stick, comprising:

[0020] The mainframe housing is for the operator to hold;

[0021] A driving unit, the driving unit is arranged on the main body housing, and the driving unit is used to drive the stirring assembly connected to the handheld kitchen stirring rod to rotate;

[0022] A control unit, used to control the rotation speed of the driving unit, the control unit comprising an adjustment component;

[0023] And a control member, which is arranged on the main body housing, and changes the electrical parameters of the adjustment component when the control member moves. The control member has a first stroke segment corresponding to the stop of the drive unit and a second stroke segment corresponding to at least two non-zero rotational speeds of the drive unit in the movement stroke; wherein the proportion of the first stroke segment to the sum of the first stroke segment and the second stroke segment is greater than or equal to 5%.

[0024] In one embodiment, the stirring assembly includes a detachable first stirring assembly and a second stirring assembly, and the functional units on the first stirring assembly and the second stirring assembly are different.

[0025] In a third aspect, an embodiment provides a method for controlling a handheld kitchen stirring stick:

[0026] The handheld kitchen stirring stick is provided with a control member, which is used to change the electrical parameters of the regulating component in the control unit when in motion;

[0027] The control unit is used to:

[0028] Detecting electrical parameters of the regulating component, and controlling the rotation speed of the driving unit according to changes in the electrical parameters;

[0029] When the operating member moves in the first travel section, the control unit detects that the electrical parameter is a first parameter value, and controls the driving unit not to rotate according to the first parameter value; and

[0030] When the operating member moves to the second stroke section, the control unit detects that the electrical parameter is at least two second parameter values, and controls the drive unit to execute at least two non-zero rotation speeds according to the at least two second parameter values;

[0031] The proportion of the first stroke segment to the sum of the first stroke segment and the second stroke segment is greater than or equal to 5%.

[0032] Beneficial effects of the present invention:

[0033] According to the above-mentioned milk froth wand main unit and handheld kitchen stirring stick, the control unit includes an adjusting component, and the operating member can change the electrical parameters of the adjusting component when moving, which provides conditions for controlling the start and stop of the drive unit and achieving at least two non-zero rotational speeds according to the changes in the electrical parameters by the control unit, and the operating member has a first stroke segment corresponding to the stop of the drive unit and a second stroke segment corresponding to at least two non-zero rotational speeds of the drive unit in the movement stroke. By moving the adjusting element to different positions, the start and stop of the drive unit can be controlled and the corresponding rotational speed can be achieved. The operation is intuitive and convenient, and the proportion of the first stroke segment to the sum of the first stroke segment and the second stroke segment is greater than or equal to 5%, which can avoid accidental rotation of the drive unit due to accidental touch, which is beneficial to ensuring safety and reliability of use; at the same time, it can also provide the second stroke segment with sufficient gear shift adjustment distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic structural diagram of an embodiment of a milk frothing stick in the present invention;

[0035] Figure 2 yes Figure 1 The structural breakdown diagram of

[0036] Figure 3 yes Figure 1 A cross-sectional view of the middle milk frothing wand;

[0037] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0038] Figure 5 yes Figure 1 The structural breakdown diagram of the middle button area;

[0039] Figure 6 It is a schematic diagram of the transmission structure between the moving parts and the regulating elements;

[0040] Figure 7 It is a structural schematic diagram of the guide seat;

[0041] Figure 8 It is a three-dimensional diagram of the moving parts in the transmission structure;

[0042] Fig. 9 yes Figure 1 The structural decomposition diagram of the middle button from another perspective;

[0043] Fig.10 yes Figure 3 A partial enlarged view of point B in the middle;

[0044] Fig.11 yes Fig.10 Schematic diagram of the assembly structure of the middle quick-release joint and the stirring assembly;

[0045] Fig.12 It is a structural exploded view of the end portion where the stirring assembly is connected to the quick-release connector;

[0046] Fig.13 This is a schematic diagram of the working principle of the milk frothing wand;

[0047] Fig.14 It is a schematic diagram of the structure of the control unit;

[0048] Fig.15 is a schematic structural diagram of an embodiment of a control unit;

[0049] Fig.16 is a schematic structural diagram of a feedback circuit in an embodiment.

[0050] List of feature names corresponding to the reference numerals in the figure:

[0051] 100. Milk frothing stick host;

[0052] 101, main body housing; 111, first housing; 1111, ring portion; 1112, guide protrusion; 112, second housing; 113, battery compartment cover;

[0053] 114, internal bracket; 1141, guide seat; 1142, main body; 1143, guide part; 1144, card interface; 1145, raised part; 1146, spring support surface;

[0054] 102, control member; 121, guide recess; 122, annular flange; 123, pressing end surface; 124, plug-in column;

[0055] 103, driving unit; 131, output terminal;

[0056] 104, control unit; 141, adjustment component; 142, adjustment unit; 143, drive module;

[0057] 105. Battery components;

[0058] 106, movable part; 161, slide groove; 162, clamping groove; 163, convex rib; 164, local protrusion; 165, limit flange; 166, spring assembly hole; 167, plug-in hole;

[0059] 107. Return spring;

[0060] 108, quick-release connector; 181, central column; 182, clamping cantilever; 183, clamping protrusion;

[0061] 200, stirring assembly; 201, stirring rod; 211, anti-rotation sleeve; 212, anti-rotation protrusion; 202, adapter; 221, snap-in groove; 203, functional unit. DETAILED DESCRIPTION

[0062] The present invention is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0063] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations. At the same time, the steps or actions in the method description can also be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the various sequences in the specification and the drawings are only for the purpose of clearly describing a certain embodiment and are not meant to be a required sequence, unless otherwise specified that a certain sequence must be followed.

[0064] The serial numbers assigned to the units in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0065] In an embodiment of the present invention, the control unit includes an adjusting component, and the operating member can change the electrical parameters of the adjusting component when moving. The control unit can control the driving unit to realize start-stop control and speed regulation according to the changes in the electrical parameters of the adjusting element, and can intuitively change the rotation state of the driving unit through the operating member, which is conducive to more conveniently realizing the rotation control of the stirring component. The first stroke segment of the operating member accounts for a ratio of greater than or equal to 5% of the sum of the first stroke segment and the second stroke segment, which can avoid accidental rotation of the driving unit due to accidental touch.

[0066] Embodiments of the handheld kitchen stirring stick of the present invention:

[0067] In some embodiments, the handheld kitchen stirring stick can be a milk frothing stick, see Figure 1 , Figure 2 and Figure 3The milk frothing stick includes a milk frothing stick main unit 100 and a stirring assembly 200. The milk frothing stick main unit 100 includes a main unit housing 101, a control member 102, a driving unit 103 and a control unit 104. The operator can realize the start and stop control and speed control of the driving unit 103 by simply operating the control member 102, thereby driving the stirring assembly 200 to achieve different rotation speeds, thereby conveniently meeting different operating requirements. It should be noted that those skilled in the art can understand that in some other embodiments, the handheld kitchen stirring stick can also be a device other than the milk frothing stick, such as an egg beater, an electric cleaning brush, etc.

[0068] The technical solution adopted in this application will be introduced below in conjunction with specific embodiments.

[0069] The host housing 101 can be held by an operator, and its specific structure is not limited. For example, in some embodiments, please refer to Figure 2 and Figure 3 The host housing 101 may include a first housing 111 and a second housing 112. The first housing 111 and the second housing 112 may both be provided with a concave cavity. The first housing 111 and the second housing 112 are buckled together to form an installation cavity. The drive unit 103 and the control unit 104 (such as Figure 6 , Fig. 9 ) is disposed in an installation cavity formed by the first shell 111 and the second shell 112. Those skilled in the art will appreciate that in some other embodiments, the host shell 101 may also be replaced with other structural forms, for example, the host shell 101 may be a cylinder with an open end; for another example, the host shell 101 may be surrounded by more than three shell parts.

[0070] Please refer to Figure 1 The main body housing 101 can be roughly rod-shaped, having a first end and a second end, the arrangement direction of the first end and the second end is parallel to the rotation axis of the driving unit 103, and the first end is used to connect the stirring assembly 200.

[0071] In some embodiments, in order to realize power supply to the driving unit 103 and the control unit 104, the milk froth wand host 100 may include a battery assembly 105, and the second housing 112 may include a battery compartment cover 113, and the battery compartment cover 113 is used to cover the battery assembly 105 in the host housing 101. Of course, the milk froth wand host 100 may also be powered by an external power cord, and in addition, a rechargeable battery may also be used, in which case the battery compartment cover 113 may not be required.

[0072] The driving unit 103 of the milk froth wand main unit 100 may be a motor. Those skilled in the art may understand that the motor may be provided with an output shaft as the output end 131 of the driving unit 103, so as to be connected to the stirring assembly 200. At the same time, the motor is connected to the control unit 104, and the motor can achieve different speeds under the control of the control unit 104, thereby driving the stirring assembly 200 connected to the milk froth wand main unit 100 to rotate at a desired speed. Of course, the driving unit 103 has a control input end, which is connected to the control unit 104 for receiving a driving signal.

[0073] In order to achieve the installation of the drive unit 103, in some embodiments, the host housing 101 may include an internal bracket 114, and the drive unit 103 and the control unit 104 may be fixed on the internal bracket 114, and the internal bracket 114 is fixedly connected to the outer shell portion of the host housing 101. By providing the above-mentioned internal bracket 114, the drive unit 103 and the control unit 104 can be installed as an integral module, and then assembled into the outer shell portion as a whole, which is convenient for assembly. Of course, in some other embodiments, the internal bracket 114 can also be integrally formed with the outer shell portion. In addition, a positioning and fixing structure can also be directly provided on the outer shell portion to fix the drive unit 103 and the control unit 104 to the outer shell portion of the host housing 101.

[0074] The control unit 104 is used to output a driving signal to the driving unit 103, so that the driving unit 103 responds to the driving signal and moves. The control unit 104 can be a circuit board assembly, including a circuit board and electronic components, which can constitute a driving circuit. The driving circuit can include an adjustment component 141 and a driving module 143. The adjustment component is used to output a resistance signal to the driving module 143, and the driving module 143 is used to control the action of the driving unit 103. The adjustment component 141 can include an adjustment element (not shown in the figure) and a movable adjustment part 142. The adjustment part 142 is used to change the electrical parameters (such as resistance) of the adjustment element during movement. The driving module 143 can control the start and stop of the driving unit 103 and realize at least two non-zero speeds according to the changes in the electrical parameters. Different speeds correspond to different movement positions of the adjustment part 142.

[0075] It should be noted that the adjustment component 141 can be any electrical device that can achieve the control effect of the drive unit, for example, it can be a variable resistor, a potentiometer, a Hall sensor, an infrared sensor, etc. When the adjustment component 141 uses a sensor such as a Hall sensor and an infrared sensor, the electrical parameters can be changed by sensing the stroke of the control member, thereby achieving the effect of adjusting the speed.

[0076] In addition, in some embodiments, the adjustment component 141 can also sense the pressure through a pressure sensor. For example, the adjustment component 141 can be a pressure sensor, which senses the pressing pressure of the control member 102 through the pressure sensor, and then changes the electrical parameters corresponding to the pressure. The greater the pressure, the higher the speed. For another example, the adjustment component 141 can change the electrical parameters by sensing the duration of continuous pressing. The longer the pressing time, the higher the speed.

[0077] The control unit 104 can be fixed on the internal bracket 114 or on the outer shell. Fig. 9 The control unit 104 can be fixed on the side of the internal bracket 114, and the fixing method is not limited, such as clamping fixation, adhesive fixation, fastener fixation, etc.

[0078] In some embodiments, the adjustment component 141 may be a variable resistor element, and the adjustment portion 142 may be a knob protruding from the main body of the adjustment component 141. The adjustment component can generate a resistance change when the adjustment portion 142 moves linearly. For example, the variable resistor element may be a sliding resistor. Figure 5 , the dotted line in the figure shows another travel limit of the dial button.

[0079] The control member 102 has a first stroke section and a second stroke section in the motion stroke, so that the start-stop control and the corresponding rotation speed can be realized by moving the adjustment element to different positions, and the operation is intuitive and convenient. In the first stroke section, the control unit 104 is used to control the start of the drive unit 103 according to the corresponding electrical parameters of the adjustment component 141, and in the second stroke section, the control unit 104 is used to control the drive unit 103 to achieve different rotation speeds according to the changes in the corresponding electrical parameters.

[0080] An embodiment using a variable resistance element will be described in detail below.

[0081] The variable resistor element has a resistance output terminal, and the resistance output terminal is used to output a resistance signal corresponding to the current resistance of the variable resistor element. The driving module 143 is used to generate a corresponding driving signal based on the resistance signal. Among them, the driving module 143 has a control terminal and a driving output terminal, the control terminal of the driving module 143 is connected to the resistance output terminal of the variable resistor element for receiving the resistance signal, and the driving output terminal of the driving module 143 is connected to the control input terminal of the driving unit 103 for outputting the driving signal to the driving unit 103.

[0082] In some embodiments, the resistance of the variable resistor element can be continuously changed within a first range of resistance values, and each resistance in the first range of resistance values ​​has a corresponding first resistance signal. In some embodiments, the resistance of the variable resistor element can be a discrete continuous change within the first range of resistance values, or a non-discrete continuous change, for example, a discrete continuous change of 1Ω, 2Ω, 3Ω, 4Ω, and 5Ω can be performed within the range of 1-5Ω, for example, a non-discrete continuous change of any resistance value in 1-5Ω can be performed within the range of 1-5Ω. In some embodiments, the first resistance signal corresponding to each resistance value in the first range of resistance values ​​is different, that is, the first resistance signal and the resistance value are in a one-to-one correspondence. In some embodiments, the first resistance signal can be a voltage signal or a current signal corresponding to the resistance value.

[0083] In some embodiments, the resistance of the variable resistor element can also be in a second range of resistance values, and each resistance value in the second range of resistance values ​​has a corresponding second resistance signal. In some embodiments, the resistance of the variable resistor element can change continuously within the second range of resistance values, for example, it can be a discrete continuous change within the second range of resistance values, or it can be a non-discrete continuous change, which will not be repeated here. In some embodiments, the second range of resistance values ​​is different from the first range of resistance values, but can be continuous, for example, the first range of resistance values ​​is 1-5Ω, including the endpoint 5Ω, and the second range of resistance values ​​is 5-10Ω, excluding the endpoint 5Ω. In some embodiments, the corresponding second resistance signals between each resistance value in the second range of resistance values ​​are different, that is, the second resistance signal and the resistance value are in a one-to-one correspondence. In some embodiments, the second resistance signal can be a voltage signal or a current signal corresponding to the resistance value.

[0084] In some embodiments, the resistance of the variable resistor element can also be in a third range of resistance values, and each resistance value in the third range of resistance values ​​has a corresponding third resistance signal. In some embodiments, the resistance of the variable resistor element can change continuously within the third range of resistance values, for example, it can be a discrete continuous change within the third range of resistance values, or it can be a non-discrete continuous change, which will not be repeated here. In some embodiments, the third range of resistance values ​​is different from the first range of resistance values ​​and the second range of resistance values, but can be continuous, which will not be repeated here. In some embodiments, the third range of resistance values ​​can also be the same as the second range of resistance values. In some embodiments, the corresponding third resistance signals between each resistance value in the third range of resistance values ​​are different, that is, the third resistance signal and the resistance value are in a one-to-one correspondence. In some embodiments, the third resistance signal can be a voltage signal or a current signal that corresponds to the resistance value one-to-one.

[0085] The control member 102 can move and drive the adjustment part 142 to move. For example, the user can operate the control member 102 to move the control member 102, thereby driving the adjustment part 142 to move. The specific structure of the control member 102 can be a key described below. It should be noted that in some other embodiments, the control member 102 can also be replaced with other structural forms, such as a rotatable lever.

[0086] The resistance of the variable resistor element corresponds to the position of the adjustment unit 142, for example, each position of the adjustment unit 142 makes the variable resistor element at a corresponding resistance. The adjustment unit 142 can be continuously moved within the first range of positions, so that the resistance of the variable resistor element changes continuously within the first range of resistance. In some embodiments, the adjustment unit 142 can also be continuously moved within the second range of positions, so that the resistance of the variable resistor element changes continuously within the second range of resistance, and continuously moved within the third range of positions, so that the resistance of the variable resistor element changes continuously within the third range of resistance, wherein the second range position is different from the first range position, but can be continuous, and the third range position can be different from the first range position and the second range position, but can be continuous, or can be the same as the second range position, which will not be repeated here.

[0087] In some embodiments, the movement of the control member 102 and the movement of the adjustment part 142 may be consistent. For example, the movement mode of the control member 102 may be a linear back-and-forth movement, so that the movement mode of the adjustment part 142 is also a linear back-and-forth movement, and different positions on the straight line correspond to different resistance values. For example, the movement mode of the control member 102 may be a rotational movement, so that the movement mode of the adjustment part 142 is also a rotational movement, and different rotation angles correspond to different resistance values. In some embodiments, the movement modes of the control member 102 and the adjustment part 142 may also be other modes of movement, which may be consistent or inconsistent. For example, when the control member 102 is a rotational movement, it can make the movement mode of the adjustment part 142 a linear back-and-forth movement based on the transmission member, which will not be repeated here. In some embodiments, the control member 102 can be configured accordingly based on its movement mode. For example, when the movement mode of the control member 102 is a rotational movement, it can be a knob button. For example, when the movement mode of the control member 102 is a linear back-and-forth movement, it can be a sliding button, which will not be repeated here.

[0088] In some embodiments, the adjustment portion 142 may be continuously moved, which corresponds to a non-discrete continuous change in the resistance value of the variable resistor element. In some embodiments, the adjustment portion 142 may also slide in stages, which corresponds to a discrete continuous change in the resistance value of the variable resistor element. For example, based on the limiting structure, the adjustment portion 142 slides directly to the endpoint of the first range position, the second range position or the third range position, thereby realizing stage sliding.

[0089] Please refer to Fig.15 In some embodiments, the variable resistance element includes a sliding converter RV, the sliding converter RV has a resistance adjustment terminal (not shown), a first terminal (terminal 1 of the sliding converter RV), a second terminal (terminal 3 of the sliding converter RV) and a sliding output terminal (terminal 2 of the sliding converter RV), wherein the first terminal of the sliding converter RV is used to connect to a power source, and the second terminal of the sliding converter RV is used to connect to a ground or to a controller (please refer to Fig.15 and Fig.16 In some embodiments, the driving module 143 may include a controller U3 and a switch device Q2) connected to the output end, the sliding output end of the sliding converter RV is connected to the output end of the controller, when the adjustment unit 142 of the sliding converter RV moves, the resistance of the sliding converter RV changes, and the sliding output end of the sliding converter RV outputs a voltage signal corresponding to the resistance. In some embodiments, the sliding converter RV may also be connected in series or in parallel with other resistors to adjust the voltage signal output by the sliding output end. In some embodiments, when the second end of the sliding converter RV is connected to the controller, the controller may turn off or turn on the output end to adjust the resistance signal output by the sliding converter RV, for example, when the output end connected to the second end of the sliding converter RV and the sliding output end is turned off, the sliding converter RV stops outputting the resistance signal to reduce the power consumption of the sliding converter RV.

[0090] In some embodiments, corresponding to the second stroke section of the regulating unit 142, the driving module 143 is used to generate a corresponding first driving signal according to the first resistance signal, so as to drive the output end 131 of the driving unit 103 to move at a corresponding speed. Each first resistance signal has a corresponding first driving signal, and different first driving signals are used to drive the output end 131 of the driving unit 103 to move at different speeds. In some embodiments, multiple first resistance signals may correspond to one first driving signal, or each first resistance signal may correspond to one first driving signal. In some embodiments, the first driving signal may be a PWM signal, in which case the PWM signal duty ratios between different first driving signals are different, thereby driving the output end 131 of the driving unit 103 to move at different speeds. In some embodiments, when the driving unit 103 includes a motor, different first driving signals are used to drive the output end 131 of the driving unit 103 to rotate at different rotational speeds.

[0091] In some embodiments, corresponding to the first stroke section of the adjustment unit 142, the driving module 143 is used to generate a corresponding second driving signal according to the second resistance signal, so as to drive the output end 131 of the driving unit 103 to stop moving. Among them, each second resistance signal may correspond to a second driving signal. In some embodiments, the second driving signal may be a high level signal or a low level signal, for example, the driving module 143 responds to the second driving signal and stops driving the driving unit 103, for example, the driving module 143 responds to the second driving signal to shut down.

[0092] In some embodiments, the driving module 143 is used to generate a corresponding third driving signal according to the third resistance signal, so as to drive the output terminal 131 of the driving unit 103 to start moving. Each third resistance signal may correspond to a third driving signal. In some embodiments, the second driving signal may be a high level signal or a low level signal. For example, the driving module 143 responds to the third driving signal and drives the driving unit 103 to move at an initial speed. For example, the driving module 143 starts in response to the third driving signal.

[0093] The first end of the switch device Q2 is used to connect to the control input end of the drive unit 103, that is, pin 1 and pin 2 of the connector J2 are used to connect the positive and negative electrodes of the drive unit 103 respectively, the first end of the switch device Q2 is connected to pin 1 of the connector J2, the second end of the switch device Q2 is used to be grounded, and the control end of the switch device Q2 is used to connect to the control end of the controller U3. In some embodiments, the switch device Q2 may include a transistor with a switching function, such as a triode or a field effect transistor.

[0094] The control end of the controller U3 is used to output a first drive signal (MOT) having a duty cycle corresponding to the first drive signal or a frequency corresponding to the first drive signal to the control end of the switch device Q2, so that the switch device Q2 is alternately turned on and off at a corresponding duty cycle or at a corresponding frequency, thereby causing the drive unit 103 to move at a corresponding speed. In some embodiments, the controller U3 may include a control device having a control function, such as a CPU, an FPGA, or a single-chip microcomputer.

[0095] Please refer to Fig.16 In some embodiments, the driving module 143 further includes a feedback circuit. The input end of the feedback circuit is used to be connected to the second end of the switching device Q2, and the output end of the feedback circuit is connected to the controller U3. The feedback circuit is used to collect the voltage or current of the second end of the switching device Q2, and output the corresponding feedback signal (L-AD) to the controller U3. In some embodiments, the voltage or current of the second end of the switching device Q2 is related to the voltage or current of the driving unit 103, so the feedback signal can represent the voltage or current of the driving unit 103. When the feedback signal does not meet the preset conditions, the controller U3 can adjust the driving signal corresponding to the feedback signal to realize feedback control based on the feedback circuit. In some embodiments, the feedback circuit includes a sampling resistor R5, one end of the sampling resistor R5 is connected to the second end of the switching device Q2, and the other end of the sampling resistor R5 is connected to the controller U3.

[0096] In the above embodiment, based on the continuous change of the resistance of the variable resistor, the driving module 143 can generate a corresponding driving signal, and different driving signals can be used to drive the driving unit 103 to move at different speeds, so that the speed of the stirring component 200 can be flexibly adjusted.

[0097] In some embodiments, the adjustment component 141 of the control unit 104 can be controlled by the control member 102, the control member 102 is arranged on the main body housing 101 along a straight line, and a transmission structure is arranged between the control member 102 and the adjustment part 142, and the transmission structure is used to drive the adjustment part 142 to move when the control member 102 moves. In some embodiments, the transmission structure can include a movable member 106 and a return spring 107, and the relevant structure will be further described below.

[0098] The pressing direction of the operating member 102 may be parallel to the rotation axis of the driving unit 103, that is, parallel to the distribution direction of the first end and the second end of the main body housing 101. Correspondingly, the moving direction of the movable member 106 may be consistent with the pressing direction of the operating member 102. In order to make the movable member 106 move according to the preset path and ensure the working stability and reliability of the milk foam wand, in some embodiments, the milk foam wand main body 100 includes a guide seat 1141 disposed in the main body housing 101, and the guide seat 1141 may be a part of the internal bracket 114. The movable member 106 is disposed on the guide seat 1141 along a straight line, and the moving direction is parallel to the moving direction of the operating member 102.

[0099] The structure of the guide seat 1141 is not limited. In a specific embodiment, please refer to Figure 5 , Figure 6 and Figure 7 The guide seat 1141 may include a main body 1142 and a guide portion 1143 protruding from the main body 1142, and the guide portion 1143 is provided with a guide space for the movable member 106 to be movably assembled. A card interface 1144 connected to the guide space may be provided on one side of the guide portion 1143, and the card interface 1144 allows the movable member 106 to be inserted into the guide space and removed from the guide space along a direction perpendicular to the moving direction of the movable member 106. The card interface 1144 provided on the guide seat 1141 can facilitate the disassembly and assembly of the movable member 106, and can avoid interference with the movable adjustment portion 142 on the adjustment component 141 when the movable member 106 is disassembled and assembled. The movable member 106 is movably arranged on the internal bracket 114, and the control unit 104 is fixed on the internal bracket 114, so that the movable member 106 can be more accurately and stably connected to the adjustment component 141 of the control unit 104.

[0100] In some other embodiments, the guide portion 1143 may also be replaced with other forms, such as a guide hole for the movable member 106 to be movably inserted, or a guide rail.

[0101] In some embodiments, a sliding groove 161 extending along the moving direction of the movable member 106 is provided on the side of the movable member 106 (see Figure 4 , Figure 8 ), the guide seat 1141 is provided with a protrusion 1145 embedded in the slide groove 161 (see Figure 4 , Figure 7), the protrusion 1145 is used to limit the rotation of the movable part 106. The above-mentioned slide groove 161 and the protrusion 1145 can cooperate to form a rotation-stopping structure, so that the movable part 106 will not rotate, so it can maintain a stable and reliable transmission relationship with the adjustment part 142 on the adjustment component 141, and it is helpful to prevent the movable part 106 from swinging in the guide space and affecting the smooth guidance of the movable part 106. Of course, in some other embodiments, the above-mentioned rotation-stopping structure can also be replaced with other forms. For example, a rotation-stopping plane can be set on the outer peripheral surface of the movable part 106, and an adapting plane can be set on the inner side wall of the guide part 1143, so as to prevent the movable part 106 from rotating through the cooperation of the planes.

[0102] In some embodiments, please refer to Figure 8 The overall shape of the movable member 106 can be roughly cylindrical, and a slot 162 is provided on the outer peripheral surface of the movable member 106. The slot 162 has a first slot side wall and a second slot side wall arranged at intervals along the moving direction of the movable member 106. The adjusting portion 142 is embedded in the slot 162 to move back and forth with the movable member 106. When installing the movable member 106, the slot 162 can be made to correspond to the adjusting portion 142 on the adjusting assembly 141, and then the movable member 106 is inserted into the guide space on the guide portion 1143 along the opening direction of the card interface 1144 on the guide portion 1143. When the movable member 106 is installed in place in the guide space, the slot walls of the slot 162 (i.e., the two ribs 163 at both sides of the slot 162) can just be located at both sides of the adjusting portion 142.

[0103] In a specific embodiment, two convex ribs 163 extending around the circumference of the movable member 106 are provided on the outer circumferential surface of the movable member 106, and the clamping groove 162 is formed by the interval between the convex ribs 163. The clamping groove 162 formed by the convex ribs 163 can form a larger clamping area around the circumference of the movable member 106, and is conducive to improving the structural strength of the movable member 106 and ensuring the structural stability of the movable member 106. Figure 8 The rib 163 may include a local protrusion 164 disposed on a side close to the adjustment component 141. The local protrusion 164 can form a longer clamping dimension with the adjustment portion 142 on the adjustment component 141, which is conducive to more reliably driving the adjustment portion 142 to move.

[0104] In addition, the convex rib 163 can abut against the guide portion 1143 along the moving direction of the movable member 106 to prevent the movable member 106 from escaping from the guide space. A limiting flange 165 is convexly provided on the outer peripheral surface of the end of the movable member 106 close to the operating member 102. After the movable member 106 is installed on the guide seat 1141, the guide portion 1143 of the guide seat 1141 is located in the interval between the limiting flange 165 and the convex rib 163 of the movable member 106, and can abut against the limiting flange 165 and the convex rib 163 to limit the moving stroke of the movable member 106, thereby preventing the operating member 102 from driving the movable member 106 to move excessively and causing the adjusting portion 142 of the adjusting assembly 141 to exceed the adjustable stroke, which is beneficial to improving the service life and reliability of the milk frothing rod.

[0105] An elastic reset member is provided between the movable member 106 and the guide seat 1141, which can automatically reset the movable member 106 and the control member 102 when the operator releases the control member 102, and drive the adjustment assembly 141 to reset. Figure 4 , Figure 8 and Fig. 9 The inner cavity of the cylindrical movable member 106 forms a spring assembly hole 166 in the form of a blind hole. The transmission structure includes a reset spring 107. The reset spring 107 is used to elastically deform when the operating member 102 is pressed down, and drive the operating member 102 to reset when the operating member 102 is released. The reset spring 107 is embedded in the spring assembly hole 166. The guide seat 1141 has an end surface arranged with the guide portion 1143 along the moving direction of the movable member 106, and the end surface forms a spring support surface 1146. One end of the reset spring 107 away from the movable member 106 abuts on the end surface. In some other embodiments, the elastic reset member can also be replaced with other forms, such as an elastic sheet, a tension spring, etc., as long as the movable member 106 can be reset.

[0106] The control member 102 is disposed at one end of the main housing 101 away from the stirring assembly 200, i.e., the second end of the main housing 101, and the pressing direction of the control member 102 is parallel to the rotation axis of the driving unit 103. In order to facilitate the operator to reliably operate the control member 102, in some embodiments, a guide structure is provided on the first housing 111, and the control member 102 is assembled on the first housing 111 through the guide structure.

[0107] In a specific embodiment, please refer to Figure 4 , Figure 5 and Fig. 9, a ring portion 1111 is provided at the second end of the first shell 111, and a guide structure is provided on the ring portion 1111 to guide the movement of the control member 102. The specific form of the guide structure is not limited. For example, a plurality of guide protrusions 1112 can be provided on the inner wall of the ring portion 1111, and the guide protrusions 1112 are distributed along the circumferential direction, and a plurality of guide recesses 121 can be correspondingly provided on the outer circumferential surface of the control member 102. The guide protrusions 1112 and the guide recesses 121 can limit the movement direction of the control member 102 and prevent the control member 102 from rotating. The ring portion 1111 provided on the first shell 111 can form an integrated guide structure, which is conducive to improving the guide accuracy and ensuring the smooth movement of the control member 102. Those skilled in the art can understand that in some other embodiments, the first shell 111 and the second shell 112 can also be relied on to form a ring portion together to guide the control member 102, or the control member 102 can also be provided on the internal bracket 114 of the host shell 101.

[0108] Since an elastic reset member is provided between the movable member 106 and the guide seat 1141, in order to prevent the operating member 102 from being ejected by the elastic reset member, in some embodiments, an annular flange 122 is provided on the outer peripheral surface of the operating member 102, and the annular flange 122 can form a stopper with the step surface on the ring portion 1111 to prevent the operating member 102 from being separated from the main housing 101.

[0109] The operating member 102 has a pressing end surface 123 for the operator to press. In some embodiments, the pressing end surface 123 can be tilted relative to the moving direction of the operating member 102, which is more ergonomic and convenient for the operator to hold the milk froth wand host 100 and press the operating member 102 with the thumb.

[0110] It should be noted that, in some other embodiments, the transmission structure between the operating member 102 and the adjusting element can also be replaced with other forms, which can realize driving the adjusting part to move when the operating member 102 moves. For example, an insertion hole can be set on the movable member 106, and the adjusting part can be directly inserted into the insertion hole; for another example, the movable member 106 and the adjusting part can be directly fixedly connected by a fastener (such as a screw); for another example, the movable member 106 and the operating member 102 can be an integral structure. In addition, the transmission structure can be a mechanism formed by multiple parts, such as a lever mechanism, a connecting rod assembly, etc. The linear motion of the operating member 102 can also be converted into the rotation of the adjusting part through the transmission structure, and the rotation of the operating member 102 can also be converted into the linear motion of the adjusting part through the transmission structure.

[0111] When the size of the operating member 102 along the pressing operation direction is small, in order to achieve good guidance of the operating member 102, a more precise fit between the operating member 102 and the host housing 101 is required. In order to avoid the operating member 102 from getting stuck and the manufacturing cost increasing, please refer to Figure 4 , a plug hole 167 may be provided on one of the control member 102 and the movable member 106, and a plug post 124 may be provided on the other, and the plug post 124 may be plugged and fixed in the plug hole 167, so that the control member 102 and the movable member 106 can support each other. It should be noted that in some other embodiments, the plug hole 167 and the plug post 124 may also be omitted, and the control member 102 may also be supported on the outer surface of the movable member 106.

[0112] The ratio of the first stroke section of the operating member 102 to the sum of the first stroke section and the second stroke section is greater than or equal to 5%. For example, the ratio of the first stroke section of the first stroke section to the second stroke section of the second stroke section can be in the range of 1:2-2:3. Taking the ratio of the first stroke section to the second stroke section as 1:2 as an example, when the operating member 102 moves to the point where the first stroke section accounts for 1 / 3 of the sum of the first stroke section and the second stroke section, the control unit 104 controls the drive unit 103 to start, for example, to start rotating. In some specific embodiments, the first stroke section can be greater than or equal to 2mm, and the sum of the first stroke section and the second stroke section can be approximately 5mm. It can be understood that in other embodiments, the ratio of the first stroke section to the sum of the first stroke section and the second stroke section can also be 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%, 30%, etc. A first stroke section that is too small can easily lead to a false touch, and a stroke section that is too large can lead to insufficient subsequent speed regulation stroke. The ratio of the first stroke section to the sum of the first stroke section and the second stroke section is greater than or equal to 5%, which is conducive to taking into account both the anti-false touch function and the operating member having a sufficient speed regulation stroke.

[0113] The stirring assembly 200 of the milk frothing stick is used to act on the food. In some embodiments, please refer to Figure 1 , Figure 3 , Fig.10 The stirring assembly 200 may include a stirring rod 201, adapter joints 202 respectively arranged at both ends of the stirring rod 201, and a functional unit 203. The adapter joint 202 is used to connect with the milk foam wand host 100 so as to rotate under the drive of the driving unit 103, and the stirring rod 201 is used to drive the functional unit 203 to rotate, thereby realizing the production of milk foam. The specific structure of the functional unit 203 can refer to the existing structure in the relevant technology. Considering that it has no direct relevance to the innovative content of the present application and the technical problems to be solved, it will not be repeated here. For example, a spiral bending part can be provided at one end of the stirring rod 201 away from the milk foam wand host 100, and a stirring spring is put on the spiral bending part to form the functional unit 203 of the stirring assembly 200.

[0114] In order to meet different usage requirements, in some embodiments, the stirring component 200 is a detachable component. At this time, the stirring component 200 of the milk foam stick includes a detachable first stirring component 200 and a second stirring component 200. The functional units 203 on the first stirring component 200 and the second stirring component 200 are different. The specific structure of these functional units 203 can refer to the existing structure in the relevant technology, and the specific form is not limited. For example, the first stirring component 200 can be a cleaning brush head for cleaning the milk foam container, and the second stirring component 200 can be a milk foam head for making milk foam; for example, the stirring spring of the first stirring component 200 can be a single-layer spring, and the stirring spring of the second stirring component 200 can be a double-layer spring. In some other embodiments, the stirring component 200 can also be connected to the milk foam stick host in a non-detachable manner, such as bonding, welding, etc.

[0115] In order to realize the detachable installation of the stirring component 200, and then realize the replacement of a new stirring component 200 or the replacement of a stirring component 200 with different functions, please refer to Fig.10 , Fig.11 and Fig.12 The milk froth wand host 100 further includes a quick-release joint 108 , which is fixed to the output end 131 of the driving unit 103 for detachably connecting the stirring assembly 200 .

[0116] In a specific embodiment, the quick-release connector 108 includes a central column 181 and a clamping cantilever 182. The central column 181 is used to be plugged into the adapter 202 at the end of the stirring assembly 200, and a torque transmission structure for transmitting torque to the stirring assembly 200 is provided on the outer circumference of the central column 181. For example, a plane structure can be provided on the outer circumference of the central column 181, and a matching plane structure can be provided on the wall of the plug hole 167 on the adapter 202, and the plane structure is used as a torque transmission structure. For another example, a flat key, a spline, etc. can be provided between the central column 181 and the adapter 202 to form a torque transmission structure.

[0117] The torque transmission structure can realize torque transmission between the quick-release joint 108 and the stirring assembly 200. In order to ensure reliable connection between the quick-release joint 108 and the stirring assembly 200, in some embodiments, the clamping cantilever 182 of the quick-release joint 108 can be arranged on one radial side of the central body, one end of the clamping cantilever 182 is connected to the main body 1142, and the other end is suspended. The suspended end of the clamping cantilever 182 is provided with a clamping protrusion 183, and the clamping protrusion 183 is used to clamp into the clamping groove 221 provided on the outer peripheral surface of the adapter joint 202, which can prevent the quick-release joint 108 from being easily separated from the stirring assembly 200. The clamping cantilever 182 is elastic, and the groove wall of the clamping groove 221 and the clamping protrusion 183 can be provided with slopes on both sides along the rotation axis of the stirring assembly 200, so that the stirring assembly 200 can be removed from the quick-release joint 108 by applying a large force to the stirring assembly 200.

[0118] In order to securely connect the stirring rod 201 to the adapter 202 and effectively transmit torque, please refer to Fig.12 The end of the stirring rod 201 is inserted and fixed in the anti-rotation sleeve 211, and the anti-rotation protrusion 212 is provided on the outer circumference of the anti-rotation sleeve 211, and the anti-rotation sleeve 211 is inserted and fixed on the adapter 202. The stirring rod 201 and the anti-rotation sleeve 211, and the anti-rotation sleeve 211 and the adapter 202 can be fixedly connected by any means such as bonding, welding, interference fit, etc., and the anti-rotation protrusion 212 can effectively transmit torque to the adapter 202.

[0119] The milk froth wand host 100 in the present application can achieve at least two non-zero speeds and start-stop control through a single control member 102. When adjusting the speed, the control member 102 can be pressed down to accelerate, and the control member 102 can be lifted to decelerate. The rotation stops when the button is almost completely released. The operator can control the working state of the milk froth wand more intuitively and conveniently, and the structure is relatively simple, and continuous adjustment without obvious speed gear feeling can be achieved, which is conducive to improving the applicability and user experience of the milk froth wand.

[0120] Embodiment of the milk foam stick host in the present invention:

[0121] The structure of the milk foam wand main unit may be the same as the structure of the milk foam wand main unit 100 in any of the above embodiments, and will not be described in detail here.

[0122] Embodiment of the control method of the handheld kitchen stirring stick in the present invention:

[0123] A method for controlling a handheld kitchen stirring stick comprises providing a control member, wherein the control member is used to change the electrical parameters of an adjusting component in a control unit when in motion; the control unit controls the rotation speed of a driving unit according to the change of the electrical parameters; the control member has a first stroke segment corresponding to the stop of the driving unit and a second stroke segment corresponding to at least two non-zero rotation speeds of the driving unit in the motion stroke; wherein the proportion of the first stroke segment to the sum of the first stroke segment and the second stroke segment is greater than or equal to 5%.

[0124] It is understandable that in some embodiments, when the control member moves to the end point of the first stroke segment, the drive unit is started, and when the control member moves between the second stroke segments, the electrical parameters of the adjustment component change, causing the speed of the drive unit to change. The speed value of the drive unit and the electrical parameter value of the adjustment component can correspond one to one, or can be a one-to-many relationship. For example, when the electrical parameter value of the adjustment component is within a certain range, the control unit controls the drive unit to execute the same speed. In some embodiments, a third stroke segment can also be set. When the control member retreats from the second stroke segment and moves to the third stroke segment, the control unit controls the drive unit to stop rotating. The starting point of the third stroke segment and the end point of the second stroke segment can be the same position or different positions. It is understandable that the starting point of the third stroke segment is the first position reached by the control member after retreating from the second stroke segment, and the end point of the third stroke segment can be the starting point of the first stroke segment.

[0125] Among them, the driving unit, the control unit, and the operating component can be the corresponding structures in any embodiment of the above-mentioned handheld kitchen stirring stick, which will not be repeated here. The control unit can control the driving unit in the manner described above to achieve start and stop control and speed adjustment.

[0126] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. A milk foam stick host, characterized in that: include: The mainframe housing is for the operator to hold; A driving unit, the driving unit is arranged on the main body housing, and the driving unit is used to drive the stirring component connected to the milk frothing wand main body to rotate; A control unit, used to control the rotation speed of the driving unit, the control unit comprising an adjustment component; and a control member, the control member being disposed on the main body housing, the control member changing the electrical parameters of the adjustment assembly when in motion, the control member having a first stroke section corresponding to the stop of the drive unit and a second stroke section corresponding to at least two non-zero rotational speeds of the drive unit in the motion stroke; The proportion of the first stroke segment to the sum of the first stroke segment and the second stroke segment is greater than or equal to 5%.

2. The milk foam stick host according to claim 1, characterized in that: The adjustment component includes an adjustment element and an adjustment part, wherein the adjustment part is used to change the electrical parameters of the adjustment element during movement; and the control unit is used to control the rotation state of the driving unit according to the change of the electrical parameters.

3. The milk foam wand host according to claim 2, characterized in that: The operating member is arranged on the main body housing and moves along a straight line. A transmission structure is arranged between the operating member and the adjusting part. The transmission structure is used to drive the adjusting part to move when the operating member moves.

4. The milk foam wand host according to claim 3, characterized in that: The transmission structure includes a movable part, and the milk foam wand host includes a guide seat arranged in the host shell, the movable part is arranged on the guide seat and moves along a straight line, and the moving direction is parallel to the moving direction of the operating part; a card slot is provided on the outer peripheral surface of the movable part, and the card slot has a first slot side wall and a second slot side wall arranged at intervals along the moving direction of the movable part, and the adjusting part is embedded in the card slot to move back and forth with the movable part.

5. The milk foam wand host according to claim 4, characterized in that: A slide groove extending along the moving direction of the movable part is provided on the side surface of the movable part, and a protrusion embedded in the slide groove is provided on the guide seat, and the protrusion is used to limit the rotation of the movable part.

6. The milk foam wand host according to claim 4, characterized in that: The control member is a button, the main body shell has a first end and a second end, the arrangement direction of the first end and the second end is parallel to the rotation axis of the drive unit, the first end is used to connect the stirring assembly, the button is arranged at the second end, and the pressing direction of the button is parallel to the rotation axis of the drive unit.

7. The milk foam wand main unit according to any one of claims 2 to 6, characterized in that: The adjusting component is a variable resistance element, which is used to generate resistance change when the adjusting part moves.

8. A handheld kitchen stirring stick, characterized in that: include: The mainframe housing is for the operator to hold; A driving unit, the driving unit is arranged on the main body housing, and the driving unit is used to drive the stirring assembly connected to the handheld kitchen stirring rod to rotate; A control unit, used to control the rotation speed of the driving unit, the control unit comprising an adjustment component; And a control member, which is arranged on the main body housing, and changes the electrical parameters of the adjustment component when the control member moves. The control member has a first stroke segment corresponding to the stop of the drive unit and a second stroke segment corresponding to at least two non-zero rotational speeds of the drive unit in the movement stroke; wherein the proportion of the first stroke segment to the sum of the first stroke segment and the second stroke segment is greater than or equal to 5%.

9. The handheld kitchen stirring stick according to claim 8, characterized in that The stirring assembly comprises a detachable first stirring assembly and a detachable second stirring assembly, and the functional units on the first stirring assembly and the second stirring assembly are different.

10. A method for controlling a handheld kitchen stirring stick, characterized in that: The handheld kitchen stirring stick is provided with a control member, which is used to change the electrical parameters of the regulating component in the control unit when in motion; The control unit is used to: Detecting electrical parameters of the regulating component, and controlling the rotation speed of the driving unit according to changes in the electrical parameters; When the operating member moves in the first travel section, the control unit detects that the electrical parameter is a first parameter value, and controls the driving unit not to rotate according to the first parameter value; and When the operating member moves to the second stroke section, the control unit detects that the electrical parameter is at least two second parameter values, and controls the drive unit to execute at least two non-zero rotation speeds according to the at least two second parameter values; The proportion of the first stroke segment to the sum of the first stroke segment and the second stroke segment is greater than or equal to 5%.

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