Handheld kitchen stirring rod main machine

Abstract

The utility model relates to the technical field of handheld kitchen stirring rods, and provides a handheld kitchen stirring rod main machine which comprises a main machine shell, a stirring rod body and a stirring rod body. The control piece is arranged on the host shell; the driving unit is arranged on the main machine shell, and the driving unit is used for driving a stirring assembly connected to the handheld kitchen stirring rod main machine to rotate; and the control unit comprises an adjusting assembly, the control piece is connected with the adjusting assembly and used for changing electrical parameters of the adjusting assembly, and the control unit is used for controlling starting and stopping of the driving unit according to changes of the electrical parameters and achieving at least two rotating speeds which are not zero. The utility model mainly solves the problem that the handheld kitchen stirring rod is inconvenient to control and operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to handheld kitchen stirring rod technical field. BACKGROUND

[0002] The milk frother is a kind of household appliance specially used for making milk froth, which can stir milk into fine milk froth by the rapid rotation of milk froth head, and add rich taste and visual effect to coffee, latte, cappuccino and other drinks.

[0003] The working of the existing milk frother is often controlled by switch. The switch of some milk frothers only has start-stop function, and only one speed can be realized after the switch is turned on. In some use scenarios, the milk frother needs to have different rotating speeds, and some switches can be set with several rotating speed gears, and each time pressing can realize the rotating speed adjustment of one gear.

[0004] The switch operation of the current milk frother has the problem of inconvenient operation, and different rotating speed control cannot be conveniently realized. INVENTION CONTENTS

[0005] The utility model mainly solves the technical problem of inconvenient control operation of handheld kitchen stirring rod.

[0006] In the first aspect, a handheld kitchen stirring rod host is provided in an embodiment.

[0007] A handheld kitchen stirring rod host comprises:

[0008] A host shell is used for being held by an operator.

[0009] A control unit is arranged on the host shell.

[0010] A driving unit is arranged on the host shell, and the driving unit is used for driving the stirring assembly connected to the handheld kitchen stirring rod host to rotate.

[0011] The control unit comprises an adjusting assembly, the control unit and the adjusting assembly are connected, the electrical parameter of the adjusting assembly is changed, and the control unit is used for controlling the start-stop of the driving unit and realizing at least two non-zero rotating speeds according to the change of the electrical parameter.

[0012] In an embodiment, the adjusting assembly comprises an adjusting element and an adjusting part, the adjusting part is used for changing the electrical parameter of the adjusting element when moving, and the control unit is used for controlling the rotating state of the driving unit according to the change of the electrical parameter.

[0013] In one embodiment, the control member is movably disposed on the main housing along a straight line, and a transmission structure is provided between the control member and the adjustment part, the transmission structure being used to drive the adjustment part to move when the control member moves.

[0014] In one embodiment, the transmission structure includes a movable component, and the handheld kitchen stir bar main unit includes a guide seat disposed within the main unit housing. The movable component is movably disposed on the guide seat in a straight line, and the direction of movement is parallel to the direction of movement of the control component. A slot is provided on the outer peripheral surface of the movable component. The slot has a first slot sidewall and a second slot sidewall arranged at intervals along the direction of movement of the movable component. The adjustment part is embedded in the slot to move back and forth with the movable component.

[0015] In one embodiment, the guide seat includes a main body and a guide portion protruding from the main body. The guide portion is provided with a guide space for the movable part to be movably assembled. One side of the guide portion is provided with a snap-fit ​​interface communicating with the guide space. The snap-fit ​​interface allows the movable part to snap into the guide space in a direction perpendicular to the direction of movement of the movable part and to be removed from the guide space.

[0016] In one embodiment, the outer peripheral surface of the movable member is provided with two circumferentially extending ribs around the movable member, and the slot is formed by the interval between the ribs; the ribs are used to abut against the guide portion along the moving direction of the movable member to prevent the movable member from dislodging from the guide space.

[0017] In one embodiment, the movable member is provided with a spring mounting hole, and the transmission structure includes a return spring. The return spring is used to elastically deform when the control member is pressed down and drive the control member to reset when the control member is released. The return spring is embedded in the spring mounting hole. The guide seat has an end face that is spaced apart from the guide portion along the movement direction of the movable member, and the end of the return spring away from the movable member abuts against the end face.

[0018] In one embodiment, the side of the movable component is provided with a groove extending along the movement direction of the movable component, and the guide seat is provided with a protrusion embedded in the groove, the protrusion being used to restrict the rotation of the movable component.

[0019] In one embodiment, the control element is a button, the main housing 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 disposed at the second end, and the pressing direction of the button is parallel to the rotation axis of the drive unit.

[0020] In one embodiment, the control member changes the electrical parameters of the adjustment component during movement. 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, wherein the first stroke segment accounts for more than or equal to 5% of the sum of the first stroke segment and the second stroke segment.

[0021] The beneficial effects of this utility model are:

[0022] According to the aforementioned handheld kitchen blender main unit, the control unit includes an adjustment component. The electrical parameters of the adjustment component can be changed through the control element, which provides the control unit with the ability to control the drive unit to start and stop and achieve at least two non-zero speeds based on the changes in the electrical parameters. This facilitates intuitive and convenient control of the drive unit's start and stop and the achievement of the corresponding speed. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of one embodiment of the milk frother in this utility model;

[0024] Figure 2 yes Figure 1 Exploded structural diagram;

[0025] Figure 3 yes Figure 1 Cross-sectional view of a milk frother;

[0026] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0027] Figure 5 yes Figure 1 Exploded view of the structure of the central button area;

[0028] Figure 6 This is a schematic diagram of the transmission structure between the moving parts and the adjusting elements;

[0029] Figure 7 This is a schematic diagram of the guide seat structure;

[0030] Figure 8 It is a three-dimensional view of the moving parts in the transmission structure;

[0031] Figure 9 yes Figure 1 An exploded view of the structure of the central button area from another perspective;

[0032] Figure 10 yes Figure 3 A magnified view of a section at point B in the middle;

[0033] Figure 11 yes Figure 10 Schematic diagram of the assembly structure of the quick-release connector and the stirring assembly;

[0034] Figure 12 This is an exploded view of the end of the mixing assembly connected to the quick-release connector;

[0035] Figure 13 This is a schematic diagram illustrating the working principle of a milk frother.

[0036] Figure 14 This is a schematic diagram of the control unit;

[0037] Figure 15 This is a schematic diagram of one embodiment of the control unit;

[0038] Figure 16 This is a schematic diagram of the feedback circuit in one embodiment.

[0039] List of feature names corresponding to the labels in the figure:

[0040] 100. Milk frother main unit;

[0041] 101. Main unit housing; 111. First housing; 1111. Ring portion; 1112. Guide protrusion; 112. Second housing; 113. Battery compartment cover;

[0042] 114. Internal support; 1141. Guide seat; 1142. Main body; 1143. Guide part; 1144. Snap-fit ​​interface; 1145. Protrusion; 1146. Spring support surface;

[0043] 102. Control component; 121. Guide recess; 122. Annular flange; 123. Pressing end face; 124. Insertion post;

[0044] 103. Drive unit; 131. Output terminal;

[0045] 104. Control unit; 141. Adjustment assembly; 142. Adjustment section; 143. Drive module;

[0046] 105. Battery assembly;

[0047] 106. Moving parts; 161. Slide groove; 162. Slot; 163. Rib; 164. Partial protrusion; 165. Limiting flange; 166. Spring assembly hole; 167. Insertion hole;

[0048] 107. Return spring;

[0049] 108. Quick-release connector; 181. Center column; 182. Snap-fit ​​cantilever; 183. Snap-fit ​​protrusion;

[0050] 200. Stirring assembly; 201. Stirring rod; 211. Anti-rotation sleeve; 212. Anti-rotation protrusion; 202. Adapter connector; 221. Snap-fit ​​groove; 203. Functional unit. Detailed Implementation

[0051] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0052] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0053] The serial numbers used to designate the units in this document, such as "first" and "second," are used only to distinguish the objects being described and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0054] In an embodiment of this utility model, the control unit includes an adjustment component. By changing the electrical parameters of the adjustment component through a control element, the control unit can control the drive unit to achieve start-stop control and speed adjustment according to the changes in the electrical parameters of the adjustment component. This intuitively changes the rotation state of the drive unit, which is beneficial for more convenient rotation control of the stirring component.

[0055] An embodiment of the handheld kitchen blender main unit of this utility model:

[0056] In some embodiments, the handheld kitchen stirrer can be a milk frother; please refer to [reference needed]. Figure 1 , Figure 2 and Figure 3The milk frother includes a milk frother main unit 100 and a stirring assembly 200. The milk frother main unit 100 includes a main unit housing 101, a control element 102, a drive unit 103, and a control unit 104. The operator can control the speed of the drive unit 103 by operating a single control element 102, thereby driving the stirring assembly 200 to achieve different speeds, conveniently meeting various operational needs. It should be noted that those skilled in the art will understand that in some other embodiments, the handheld kitchen stirring stick can also be a device other than a milk frother, such as an egg beater or an electric cleaning brush.

[0057] The technical solutions adopted in this application will be described below with reference to specific embodiments.

[0058] The main unit housing 101 can be held by the operator, and its specific structural form is not limited. For example, in some embodiments, please refer to... Figure 2 and Figure 3 The main unit housing 101 may include a first housing 111 and a second housing 112. Both the first housing 111 and the second housing 112 may have cavities. The first housing 111 and the second housing 112 are interlocked to form a mounting cavity. The drive unit 103 and the control unit 104 (e.g., Figure 6 , Figure 9 It is disposed within the mounting cavity formed by the engagement of the first housing 111 and the second housing 112. Those skilled in the art will understand that in some other embodiments, the main housing 101 can also be replaced with other structural forms, such as the main housing 101 being a cylinder with one end open; or the main housing 101 being formed by three or more housing parts.

[0059] Please refer to Figure 1 The main housing 101 can be generally rod-shaped, having a first end and a second end. The first end and the second end are arranged in a direction parallel to the rotation axis of the drive unit 103. The first end is used to connect to the stirring assembly 200.

[0060] In some embodiments, to power the drive unit 103 and the control unit 104, the milk frother main unit 100 may include a battery assembly 105, and the second housing 112 may include a battery compartment cover 113 for sealing the battery assembly 105 inside the main unit housing 101. Alternatively, the milk frother main unit 100 may be powered by an external power cord, or it may use a rechargeable battery, in which case the battery compartment cover 113 is not required.

[0061] The drive unit 103 of the milk frother 100 can be an electric motor. Those skilled in the art will understand that the electric motor can have its output shaft set as the output terminal 131 of the drive unit 103, thus allowing the stirring assembly 200 to connect. Simultaneously, the electric motor is connected to the control unit 104, enabling it to achieve different speeds under the control of the control unit 104, thereby driving the stirring assembly 200 connected to the milk frother 100 to rotate at the desired speed. Of course, the drive unit 103 also has a control input terminal, which is connected to the control unit 104 to receive drive signals.

[0062] To facilitate the installation of the drive unit 103, in some embodiments, the main housing 101 may include an internal bracket 114. Both the drive unit 103 and the control unit 104 can be fixed to the internal bracket 114, which is fixedly connected to the outer shell portion of the main housing 101. By providing the internal bracket 114, the drive unit 103 and the control unit 104 can be installed as a single module and then assembled into the outer shell portion, which facilitates assembly. Of course, in some other embodiments, the internal bracket 114 can also be integrally formed with the outer shell portion. Alternatively, positioning and fixing structures can 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 main housing 101.

[0063] Control unit 104 outputs a drive signal to drive unit 103, causing drive unit 103 to respond to the drive signal and move. Control unit 104 can be a circuit board assembly, including a circuit board and electronic components, capable of forming a drive circuit. The drive circuit can include adjustment component 141 and drive module 143. The adjustment component outputs a resistance signal to drive module 143, and drive module 143 controls the operation of drive unit 103. Adjustment component 141 can include an adjustment element (not shown) and a movable adjustment part 142. Adjustment part 142 changes the electrical parameters (e.g., resistance) of the adjustment element during movement. Drive module 143 can control drive unit 103 to start and stop and achieve at least two non-zero rotational speeds according to changes in electrical parameters. Different rotational speeds correspond to different movement positions of adjustment part 142.

[0064] It should be noted that the adjustment component 141 can be any electrical device capable of achieving the control effect of the drive unit, such as a variable resistor, a potentiometer, a Hall sensor, an infrared sensor, etc. When the adjustment component 141 uses sensors such as Hall sensors or infrared sensors, it can change the electrical parameters by sensing the stroke of the control component, thereby achieving the effect of adjusting the rotation speed.

[0065] In some embodiments, the adjustment component 141 can also sense the pressure magnitude via a pressure sensor. For example, the adjustment component 141 can be a pressure sensor that senses the pressing pressure of the control element 102 and then changes the electrical parameters corresponding to the pressure; the greater the pressure, the higher the rotation speed. Alternatively, the adjustment component 141 can change the electrical parameters by sensing the duration of continuous pressing; the longer the pressing time, the higher the rotation speed.

[0066] The control unit 104 can be fixed to the internal bracket 114 or to the outer casing. In one specific embodiment, please refer to... Figure 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 snap-fit ​​fixing, adhesive fixing, fastener fixing, etc.

[0067] In some embodiments, the adjusting component 141 is a variable resistive element, and the adjusting part 142 can be a toggle protruding from the body of the adjusting component 141. The adjusting component 141 is capable of generating a resistance change when the adjusting part 142 moves linearly. For example, the variable resistive element can be a sliding rheostat. Please refer to... Figure 5 The figure shows another travel limit of the toggle switch, indicated by a dashed line.

[0068] In some embodiments, the adjustment unit 142 has a first stroke segment and a second stroke segment in its movement stroke, so that the adjustment element can be moved to different positions to realize start-stop control and achieve corresponding speeds, making the operation intuitive and convenient. In the first stroke segment, the control unit 104 is used to control the drive unit 103 to start according to the corresponding electrical parameters of the adjustment component 141. In the second stroke segment, the control unit 104 is used to control the drive unit 103 to achieve different speeds according to the changes in the corresponding electrical parameters.

[0069] The following will describe in detail an embodiment that uses a variable resistor element.

[0070] The variable resistor element has a resistance output terminal, which is used to output the resistance signal corresponding to the current resistance value of the variable resistor element. The drive module 143 is used to generate a corresponding drive signal based on the resistance signal. The drive module 143 has a control terminal and a drive output terminal. The control terminal of the drive module 143 is connected to the resistance output terminal of the variable resistor element to receive the resistance signal, and the drive output terminal of the drive module 143 is connected to the control input terminal of the drive unit 103 to output a drive signal to the drive unit 103.

[0071] In some embodiments, the resistance value of the variable resistor element can continuously change within a first range of resistance values, and each resistance value in the first range has a corresponding first resistance value signal. In some embodiments, the resistance value of the variable resistor element can be a discrete continuous change or a non-discrete continuous change within the first range of resistance values. For example, it can be a discrete continuous change of 1Ω, 2Ω, 3Ω, 4Ω, and 5Ω within the range of 1-5Ω, or a non-discrete continuous change of any resistance value in the range of 1-5Ω within the range of 1-5Ω. In some embodiments, the first resistance value signals corresponding to each resistance value in the first range are different, that is, there is a one-to-one correspondence between the first resistance value signal and the resistance value. In some embodiments, the first resistance value signal can be a voltage signal or a current signal that corresponds one-to-one with the resistance value.

[0072] In some embodiments, the resistance value of the variable resistor element can also be within a second range, and each resistance value in the second range has a corresponding second resistance signal. In some embodiments, the resistance value of the variable resistor element can change continuously within the second range, for example, it can be a discrete continuous change or a non-discrete continuous change, which will not be elaborated further here. In some embodiments, the second range resistance value is different from the first range resistance value, but can be continuous. For example, the first range resistance value is 1-5Ω, including the endpoint 5Ω, and the second range resistance value is 5-10Ω, excluding the endpoint 5Ω. In some embodiments, the second resistance signal corresponding to each resistance value in the second range is different, that is, the second resistance signal and the resistance value have a one-to-one correspondence. In some embodiments, the second resistance signal can be a voltage signal or a current signal that corresponds one-to-one with the resistance value.

[0073] In some embodiments, the resistance value of the variable resistor element can also be within a third resistance range, and each resistance value in the third range has a corresponding third resistance signal. In some embodiments, the resistance value of the variable resistor element can change continuously within the third resistance range; for example, it can be a discrete continuous change or a non-discrete continuous change within the third resistance range, which will not be elaborated further here. In some embodiments, the third resistance range is different from the first and second resistance ranges, but can be continuous, which will not be elaborated further here. In some embodiments, the third resistance range can also be the same as the second resistance range. In some embodiments, the third resistance signal corresponding to each resistance value in the third range is different, that is, there is a one-to-one correspondence between the third resistance signal and the resistance value. In some embodiments, the third resistance signal can be a voltage signal or a current signal that corresponds one-to-one with the resistance value.

[0074] The control element 102 is movable and can move the adjustment part 142. For example, a user can operate the control element 102 to move it, thereby moving the adjustment part 142. The specific structure of the control element 102 can be a button as described below. It should be noted that in some other embodiments, the control element 102 can also be replaced with other structural forms, such as a rotatable lever.

[0075] The resistance value of the variable resistor element corresponds to the position of the adjustment unit 142. For example, each position of the adjustment unit 142 causes the variable resistor element to be at a corresponding resistance value. The adjustment unit 142 can move continuously within a first range of positions, causing the resistance value of the variable resistor element to continuously change within the first range. In some embodiments, the adjustment unit 142 can also move continuously within a second range of positions, causing the resistance value of the variable resistor element to continuously change within the second range, and continuously within a third range of positions, causing the resistance value of the variable resistor element to continuously change within the third range. The second range position is different from the first range position but can be continuous; the third range position can be different from the first and second range positions but can be continuous, or it can be the same as the second range position. Further details are omitted here.

[0076] In some embodiments, the movement of the control member 102 and the movement of the adjustment part 142 can be consistent. For example, the movement of the control member 102 can be a linear back-and-forth motion, so that the movement of the adjustment part 142 is also a linear back-and-forth motion, with different resistance values ​​corresponding to different positions on the line. For example, the movement of the control member 102 can be a rotational motion, so that the movement of the adjustment part 142 is also a rotational motion, with different resistance values ​​corresponding to different rotation angles. In some embodiments, the movement of the control member 102 and the adjustment part 142 can also be other types of movement, which can be consistent or inconsistent. For example, when the control member 102 is rotating, it can make the movement of the adjustment part 142 linear back-and-forth motion based on the transmission member, which will not be elaborated here. In some embodiments, the control member 102 can be configured accordingly based on its movement. For example, when the movement of the control member 102 is rotational, it can be a knob or button; when the movement of the control member 102 is linear back-and-forth motion, it can be a sliding button, which will not be elaborated here.

[0077] In some embodiments, the adjustment part 142 may move continuously, corresponding to a non-discrete continuous change in the resistance value of the variable resistor element. In some embodiments, the adjustment part 142 may also slide in stages, corresponding to a discrete continuous change in the resistance value of the variable resistor element. For example, based on the limiting structure, the adjustment part 142 may slide directly to the endpoint of the first range position, the second range position, or the third range position when it slides, thereby realizing the staged sliding.

[0078] Please refer to Figure 15 In some embodiments, the variable resistor element includes a slider RV, which has a resistance adjustment terminal (not shown), a first terminal (terminal 1 of the slider RV), a second terminal (terminal 3 of the slider RV), and a slider output terminal (terminal 2 of the slider RV). The first terminal of the slider RV is used to connect to a power supply, and the second terminal of the slider RV is used to ground or connect to a controller (see reference). Figure 15 and Figure 16 In some embodiments, the drive module 143 may include the output terminals of the controller U3 and the switching device Q2 connected together. The sliding output terminal of the sliding converter RV is connected to the output terminal of the controller. When the adjustment part 142 of the sliding converter RV moves, the resistance value of the sliding converter RV changes, and the sliding output terminal of the sliding converter RV outputs a voltage signal corresponding to the resistance value. 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 terminal. In some embodiments, when the second terminal of the sliding converter RV is connected to the controller, the controller may turn off or on the output terminal to adjust the resistance signal output by the sliding converter RV. For example, when the output terminal connected to the second terminal and the sliding output terminal of the sliding converter RV is turned off, the sliding converter RV stops outputting the resistance signal to reduce the power consumption of the sliding converter RV.

[0079] In some embodiments, corresponding to the second stroke segment of the adjustment unit 142, the drive module 143 generates a corresponding first drive signal based on the first resistance signal to drive the output terminal 131 of the drive unit 103 to move at a corresponding speed. Each first resistance signal has a corresponding first drive signal, and different first drive signals drive the output terminal 131 of the drive unit 103 to move at different speeds. In some embodiments, multiple first resistance signals may correspond to one first drive signal, or each first resistance signal may correspond to one first drive signal. In some embodiments, the first drive signal may be a PWM signal, where the duty cycles of the PWM signals between different first drive signals are different, thereby driving the output terminal 131 of the drive unit 103 to move at different speeds. In some embodiments, when the drive unit 103 includes a motor, different first drive signals drive the output terminal 131 of the drive unit 103 to rotate at different rotational speeds.

[0080] In some embodiments, corresponding to the first stroke segment of the adjustment unit 142, the drive module 143 generates a corresponding second drive signal based on the second resistance signal, to drive the output terminal 131 of the drive unit 103 to stop moving. Each second resistance signal may correspond to a single second drive signal. In some embodiments, the second drive signal may be a high-level signal or a low-level signal; for example, the drive module 143 may respond to the second drive signal and stop driving the drive unit 103, or the drive module 143 may respond to the second drive signal and turn off.

[0081] In some embodiments, the driving module 143 is used to generate a corresponding third driving signal based on the resistance third signal, so as to drive the output terminal 131 of the driving unit 103 to start moving. Each resistance third signal may correspond to a single 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 moving in response to the third driving signal.

[0082] The first terminal of the switching device Q2 is used to connect to the control input terminal of the driving unit 103, that is, pins 1 and 2 of connector J2 are used to connect to the positive and negative terminals of the driving unit 103, respectively. The first terminal of the switching device Q2 is connected to pin 1 of connector J2, and the second terminal of the switching device Q2 is used to ground. The control terminal of the switching device Q2 is used to connect to the control terminal of the controller U3. In some embodiments, the switching device Q2 may include a transistor or field-effect transistor, etc., that has a switching function.

[0083] The control terminal of controller U3 outputs a first drive signal (MOT) with a duty cycle corresponding to the first drive signal or a frequency corresponding to the first drive signal to the control terminal of switching device Q2, so that switching device Q2 alternately turns on and off with the corresponding duty cycle or frequency, thereby causing drive unit 103 to move at a corresponding speed. In some embodiments, controller U3 may include control devices with control functions such as CPU, FPGA, and microcontroller.

[0084] Please refer to Figure 16 In some embodiments, the drive module 143 further includes a feedback circuit. The input terminal of the feedback circuit is connected to the second terminal of the switching device Q2, and the output terminal of the feedback circuit is connected to the controller U3. The feedback circuit is used to acquire the voltage or current at the second terminal of the switching device Q2 and output a corresponding feedback signal (L-AD) to the controller U3. In some embodiments, the voltage or current at the second terminal of the switching device Q2 is related to the voltage or current of the drive unit 103. Therefore, the feedback signal can characterize the voltage or current of the drive unit 103. When the feedback signal does not meet preset conditions, the controller U3 can adjust the drive signal based on the feedback signal to achieve feedback control based on the feedback circuit. In some embodiments, the feedback circuit includes a sampling resistor R5, one end of which is connected to the second terminal of the switching device Q2, and the other end of which is connected to the controller U3.

[0085] In the above embodiments, based on the continuous change of the resistance value of the variable resistor element, the drive module 143 can generate a corresponding drive signal, and different drive signals can be used to drive the drive unit 103 to move at different speeds, thereby enabling the speed of the stirring assembly 200 to be flexibly adjusted.

[0086] In some embodiments, the adjustment component 141 of the control unit 104 can be controlled by a control member 102. The control member 102 is linearly movably disposed on the main housing 101. A transmission structure is provided between the control member 102 and the adjustment part 142. 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 may include a movable member 106 and a return spring 107. The relevant structure will be further described below.

[0087] The pressing direction of the control member 102 can be parallel to the rotation axis of the drive unit 103, that is, parallel to the distribution direction of the first and second ends of the main housing 101. Correspondingly, the movement direction of the movable member 106 can be consistent with the pressing direction of the control member 102. In order to enable the movable member 106 to move along a preset path and ensure the working stability and reliability of the milk frother, in some embodiments, the milk frother main unit 100 includes a guide seat 1141 disposed in the main housing 101. The guide seat 1141 can be part of the internal support 114. The movable member 106 is movably disposed on the guide seat 1141 in a straight line, and the movement direction is parallel to the movement direction of the control member 102.

[0088] The structural form of the guide seat 1141 is not limited. In one 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. The guide portion 1143 is provided with a guide space for the movable component 106 to be movably assembled. A snap-fit ​​interface 1144 communicating with the guide space may be provided on one side of the guide portion 1143. The snap-fit ​​interface 1144 allows the movable component 106 to snap into the guide space in a direction perpendicular to the direction of movement of the movable component 106 and to be removed from the guide space. The snap-fit ​​interface 1144 on the guide seat 1141 facilitates the assembly and disassembly of the movable component 106 and avoids interference with the movable adjustment portion 142 on the adjustment assembly 141 when assembling and disassembling the movable component 106. By movably mounting the movable component 106 on the internal support 114 and fixing the control unit 104 on the internal support 114, the movable component 106 can be connected to the adjustment assembly 141 of the control unit 104 more accurately and stably.

[0089] 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, etc.

[0090] In some embodiments, the side of the movable member 106 is provided with a groove 161 extending along the movement direction of the movable member 106 (see reference). Figure 4 , Figure 8 The guide seat 1141 is provided with a protrusion 1145 that is embedded in the slide groove 161 (see reference). Figure 4 , Figure 7The protrusion 1145 is used to restrict the rotation of the movable member 106. The aforementioned groove 161 and protrusion 1145 can cooperate to form an anti-rotation structure, preventing the movable member 106 from rotating. Therefore, it can maintain a stable and reliable transmission relationship with the adjustment part 142 on the adjustment assembly 141, and it helps to prevent the movable member 106 from swinging in the guide space, thus affecting the smooth guidance of the movable member 106. Of course, in some other embodiments, the aforementioned anti-rotation structure can also be replaced with other forms. For example, an anti-rotation plane can be provided on the outer peripheral surface of the movable member 106, and an adapting plane can be provided on the inner sidewall of the guide part 1143, thereby preventing the movable member 106 from rotating through the cooperation of the planes.

[0091] In some embodiments, please refer to Figure 8 The movable part 106 can be roughly cylindrical in shape. A slot 162 is provided on the outer peripheral surface of the movable part 106. The slot 162 has a first slot sidewall and a second slot sidewall arranged at intervals along the movement direction of the movable part 106. The adjusting part 142 is embedded in the slot 162 to move back and forth with the movable part 106. When installing the movable part 106, the slot 162 can be aligned with the adjusting part 142 on the adjusting assembly 141. Then, the movable part 106 is inserted into the guide space on the guide part 1143 along the opening direction of the slot interface 1144 on the guide part 1143. When the movable part 106 is installed in the guide space, the slot wall of the slot 162 (i.e., the two protruding ribs 163 on both sides of the slot 162) can be located on both sides of the adjusting part 142 respectively.

[0092] In one specific embodiment, the outer peripheral surface of the movable member 106 is provided with two circumferentially extending ribs 163, and a groove 162 is formed by the interval between the ribs 163. The groove 162 formed by the ribs 163 can create a larger engaging area around the circumference of the movable member 106, and is beneficial to improving the structural strength of the movable member 106 and ensuring its structural stability. Figure 8 The rib 163 may include a partial protrusion 164 disposed on the side near the adjustment assembly 141. The partial protrusion 164 can form a longer engagement dimension with the adjustment part 142 on the adjustment assembly 141, which is beneficial to drive the adjustment part 142 to move more reliably.

[0093] In addition, the rib 163 can abut against the guide portion 1143 along the movement direction of the movable member 106 to prevent the movable member 106 from falling out of the guide space. A limiting flange 165 is provided on the outer peripheral surface of the movable member 106 near the control 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 gap between the limiting flange 165 and the rib 163 of the movable member 106, and can abut against the limiting flange 165 and the rib 163 to limit the movement stroke of the movable member 106. This prevents the control member 102 from driving the movable member 106 to move excessively, causing the adjustment portion 142 of the adjustment component 141 to exceed the adjustable stroke, which is beneficial to improving the working life and reliability of the milk frother.

[0094] A resilient reset element is provided between the movable component 106 and the guide seat 1141, which enables the movable component 106 and the control component 102 to automatically reset when the operator releases the control component 102, and also drives the adjustment component 141 to reset. In one specific embodiment, please refer to... Figure 4 , Figure 8 and Figure 9 The inner cavity of the cylindrical movable member 106 forms a blind-hole spring mounting hole 166. The transmission structure includes a return spring 107, which elastically deforms when the control member 102 is pressed down and drives the control member 102 to return to its original position when it is released. The return spring 107 is embedded in the spring mounting hole 166. The guide seat 1141 has an end face spaced apart from the guide portion 1143 along the movement direction of the movable member 106. This end face forms a spring support surface 1146, and the end of the return spring 107 away from the movable member 106 abuts against the end face. In some other embodiments, the elastic return member can be replaced with other forms, such as an elastic sheet, a tension spring, etc., as long as the return of the movable member 106 can be achieved.

[0095] The control element 102 is located at the end of the main housing 101 away from the stirring assembly 200, i.e., the second end of the main housing 101. The pressing direction of the control element 102 is parallel to the rotation axis of the drive unit 103. In order to facilitate the operator to operate the control element 102 reliably, in some embodiments, the first housing 111 is provided with a guide structure, and the control element 102 is assembled on the first housing 111 through the guide structure.

[0096] In one specific embodiment, please refer to Figure 4 , Figure 5 and Figure 9The second end of the first housing 111 is provided with a ring portion 1111, 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, several guide protrusions 1112 can be provided on the inner wall of the ring portion 1111, distributed circumferentially, while several guide recesses 121 can be correspondingly provided on the outer circumferential surface of the control member 102. The guide protrusions 1112 and guide recesses 121 can restrict the movement direction of the control member 102 and prevent the control member 102 from rotating. The ring portion 1111 provided on the first housing 111 can form an integrated guide structure, which is beneficial to improving the guiding accuracy and ensuring the smooth operation of the control member 102. Those skilled in the art will understand that in some other embodiments, the first housing 111 and the second housing 112 can also be used to form a ring portion to guide the control member 102, or the control member 102 can also be disposed on the internal support 114 of the main housing 101.

[0097] Since an elastic reset member is provided between the movable part 106 and the guide seat 1141, in order to prevent the control 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 control member 102. The annular flange 122 can form a stop engagement with the stepped surface on the ring 1111 to prevent the control member 102 from separating from the main housing 101.

[0098] The control element 102 has a pressing end face 123 for the operator to press. In some embodiments, the pressing end face 123 may be tilted relative to the direction of movement of the control element 102, which is more ergonomic and makes it easier for the operator to hold the milk frother main unit 100 and press the control element 102 with their thumb.

[0099] It should be noted that in some other embodiments, the transmission structure between the control member 102 and the adjustment element can be replaced with other forms, as long as it can drive the adjustment part to move when the control member 102 moves. For example, an insertion hole can be provided on the movable member 106, and the adjustment part can be directly inserted into the insertion hole; or the movable member 106 and the adjustment part can be directly fixedly connected by fasteners (such as screws); or the movable member 106 and the control 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 linkage assembly, etc., and the linear motion of the control member 102 can also be converted into the rotation of the adjustment part through the transmission structure.

[0100] When the dimension of the control element 102 along the pressing operation direction is small, a more precise fit is required between the control element 102 and the main housing 101 to achieve good guidance of the control element 102. To avoid this resulting in jamming of the control element 102 and increased manufacturing costs, please refer to... Figure 4A insertion hole 167 can be provided on one of the control member 102 and the movable member 106, and a insertion post 124 can be provided on the other. The insertion post 124 is inserted and fixed in the insertion 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 insertion hole 167 and the insertion post 124 can be omitted, and the control member 102 can also rest on the outer surface of the movable member 106.

[0101] In some embodiments, the proportion of the first stroke segment of the control member 102 to the sum of the first and second stroke segments is greater than or equal to 5%. For example, the ratio of the first stroke of the first stroke segment to the second stroke of the second stroke segment can be in the range of 1:2 to 2:3. Taking a ratio of 1:2 for the first and second stroke segments as an example, when the control member 102 moves to 1 / 3 of the sum of the first and second stroke segments, the control unit 104 controls the drive unit 103 to start, for example, to begin rotation. In some specific embodiments, the first stroke can be greater than or equal to 2 mm, and the sum of the first and second stroke segments can be approximately 5 mm. Understandably, in other embodiments, the proportion of the first stroke segment to the sum of the first and second stroke segments can also be 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%, 30%, etc. A first stroke that is too small can easily lead to accidental touches, while a first stroke that is too large can lead to insufficient subsequent speed adjustment strokes. A first stroke that is greater than or equal to 5% of the sum of the first and second strokes is beneficial for balancing the anti-accidental touch function and ensuring sufficient speed adjustment stroke for the control member.

[0102] The stirring component 200 of the milk frother is used to agitate the ingredients; in some embodiments, please refer to... Figure 1 , Figure 3 , Figure 10 The stirring assembly 200 may include a stirring rod 201, adapter connectors 202 respectively disposed at both ends of the stirring rod 201, and a functional unit 203. The adapter connectors 202 are used to connect to the milk frother main unit 100 to rotate under the drive of the drive unit 103. 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 existing structures in related technologies. Considering that it is not directly related to the innovative content and technical problem to be solved in this application, it will not be described in detail here. For example, a spirally bent portion can be provided at the end of the stirring rod 201 away from the milk frother main unit 100, and a stirring spring can be sleeved on the spirally bent portion to form the functional unit 203 of the stirring assembly 200.

[0103] To meet different usage needs, in some embodiments, the stirring assembly 200 is a detachable component. In this case, the stirring assembly 200 of the milk frother includes a detachable first stirring assembly 200 and a second stirring assembly 200. The functional units 203 on the first stirring assembly 200 and the second stirring assembly 200 are different, and the specific structure of these functional units 203 can refer to existing structures in related technologies, with no limitation on the specific form. For example, the first stirring assembly 200 can be a cleaning brush head for cleaning the milk frothing container, while the second stirring assembly 200 can be a milk frothing head for making milk froth; or, for example, the stirring spring of the first stirring assembly 200 can be a single-layer spring, while the stirring spring of the second stirring assembly 200 can be a double-layer spring. In some other embodiments, the stirring assembly 200 can also be connected to the milk frother main unit in a non-detachable manner, such as by bonding or welding.

[0104] To enable the detachable installation of the mixing component 200, and thus allow for the replacement of the mixing component 200 with a new one or a mixing component 200 with a different function, please refer to [reference needed]. Figure 10 , Figure 11 and Figure 12 The milk frother main unit 100 also includes a quick-release connector 108, which is fixed to the output end 131 of the drive unit 103 for detachable connection of the stirring assembly 200.

[0105] In one specific embodiment, the quick-release connector 108 includes a central column 181 and a snap-fit ​​cantilever 182. The central column 181 is used to insert into the adapter connector 202 at the end of the stirring assembly 200. The outer peripheral surface of the central column 181 is provided with a torque transmission structure for transmitting torque to the stirring assembly 200. For example, a planar structure can be provided on the outer peripheral surface of the central column 181, and a matching planar structure can be provided on the wall of the insertion hole 167 on the adapter connector 202, relying on the planar structure as the torque transmission structure. Alternatively, a flat key, spline, or other similar structure can be provided between the central column 181 and the adapter connector 202 to form a torque transmission structure.

[0106] The torque transmission structure enables torque transmission between the quick-release connector 108 and the stirring assembly 200. To ensure a reliable connection between the quick-release connector 108 and the stirring assembly 200, in some embodiments, the quick-release connector 108 locking cantilever 182 can be located on the radial side of the central body. One end of the locking cantilever 182 is connected to the main body 1142, and the other end is suspended. The suspended end of the locking cantilever 182 is provided with a locking protrusion 183, which is used to lock into the locking groove 221 provided on the outer peripheral surface of the adapter connector 202, thus preventing the quick-release connector 108 from easily separating from the stirring assembly 200. The locking cantilever 182 is elastic, and the groove wall of the locking groove 221 and the two sides of the locking protrusion 183 along the rotation axis of the stirring assembly 200 can be provided with slopes. This allows the stirring assembly 200 to be removed from the quick-release connector 108 by applying greater force.

[0107] To ensure the stirring rod 201 is securely connected to the adapter 202 and to effectively transmit torque, please refer to... Figure 12 The end of the stirring rod 201 is inserted into and fixed in the anti-rotation sleeve 211, and the outer circumferential surface of the anti-rotation sleeve 211 is provided with an anti-rotation protrusion 212. The anti-rotation sleeve 211 is inserted into 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 method such as bonding, welding, or interference fit, and the anti-rotation protrusion 212 can effectively transmit torque between itself and the adapter 202.

[0108] The milk frother 100 in this application can achieve both start / stop control and speed adjustment through a single control element 102. When adjusting the speed, pressing down on the control element 102 can accelerate the speed, lifting up the control element 102 can decelerate the speed, and the button can be almost fully released to stop the rotation. The operator can control the working state of the milk frother more intuitively and conveniently. Moreover, the structure is relatively simple and can achieve continuous adjustment without obvious speed gear feel, which is conducive to improving the applicability and user experience of the milk frother.

[0109] Understandably, in some embodiments, when the control member moves to the end of the first stroke segment, the drive unit is activated. As the control member moves between the second stroke segments, the electrical parameters of the regulating component change, causing a change in the rotational speed of the drive unit. The rotational speed value of the drive unit and the electrical parameter value of the regulating component can have a one-to-one correspondence, or a one-to-many relationship. For example, if the electrical parameter values ​​of the regulating component are within a certain range, the control unit controls the drive unit to execute the same rotational speed. In some embodiments, a third stroke segment can also be provided. When the control member retracts 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 ending point of the second stroke segment can be the same position or different positions. Understandably, the starting point of the third stroke segment is the first position reached by the control member retracting from the second stroke segment, and the ending point of the third stroke segment can be the starting point of the first stroke segment.

[0110] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A handheld kitchen blender main unit, characterized in that, include: The main unit housing is designed for the operator to hold. The control components are mounted on the main unit housing; A drive unit is disposed on the main housing and is used to drive the stirring assembly connected to the main body of the handheld kitchen stirrer to rotate. The control unit includes an adjustment component, the control element is connected to the adjustment component, and is used to change the electrical parameters of the adjustment component. The control unit is used to control the start and stop of the drive unit and achieve at least two non-zero speeds according to the changes in the electrical parameters.

2. The handheld kitchen blender main unit as described in claim 1, characterized in that, The adjustment assembly includes an adjustment element and an adjustment section. The adjustment section is used to change the electrical parameters of the adjustment element during movement. The control unit is used to control the rotation state of the drive unit according to the changes in the electrical parameters.

3. The handheld kitchen blender main unit as described in claim 2, characterized in that, The control component is movably mounted on the main housing along a straight line. A transmission structure is provided between the control component and the adjustment part. The transmission structure is used to drive the adjustment part to move when the control component moves.

4. The handheld kitchen blender main unit as described in claim 3, characterized in that, The transmission structure includes a movable component. The handheld kitchen stirrer main unit includes a guide seat disposed within the main unit housing. The movable component is movably disposed on the guide seat in a straight line, and the direction of movement is parallel to the direction of movement of the control component. A slot is provided on the outer peripheral surface of the movable component. The slot has a first slot sidewall and a second slot sidewall arranged at intervals along the direction of movement of the movable component. The adjustment part is embedded in the slot to move back and forth with the movable component.

5. The handheld kitchen blender main unit as described in claim 4, characterized in that, The guide seat includes a main body and a guide portion protruding from the main body. The guide portion is provided with a guide space for the movable part to be movably assembled. One side of the guide portion is provided with a snap-fit ​​interface communicating with the guide space. The snap-fit ​​interface allows the movable part to snap into the guide space in a direction perpendicular to the direction of movement of the movable part and to be removed from the guide space.

6. The handheld kitchen blender main unit as described in claim 5, characterized in that, The outer circumferential surface of the movable part is provided with two circumferentially extending ribs around the movable part, and the slot is formed by the interval between the ribs; the ribs are used to abut against the guide part along the moving direction of the movable part to prevent the movable part from coming out of the guide space.

7. The handheld kitchen blender main unit as described in claim 5, characterized in that, The movable part is provided with a spring mounting hole, and the transmission structure includes a return spring. The return spring is used to elastically deform when the control part is pressed down and drive the control part to reset when the control part is released. The return spring is embedded in the spring mounting hole. The guide seat has an end face that is spaced apart from the guide portion along the movement direction of the movable member, and the end of the return spring away from the movable member abuts against the end face.

8. The handheld kitchen blender main unit as described in any one of claims 4 to 7, characterized in that, The side of the movable component is provided with a groove extending along the direction of movement of the movable component, and the guide seat is provided with a protrusion that is embedded in the groove, the protrusion being used to restrict the rotation of the movable component.

9. The handheld kitchen blender main unit as described in claim 1, characterized in that, The control element is a button. The main housing 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 disposed at the second end. The pressing direction of the button is parallel to the rotation axis of the drive unit.

10. The handheld kitchen blender main unit as described in any one of claims 1 to 7, characterized in that, The control element changes the electrical parameters of the adjustment component during movement. The control element 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 its movement stroke, wherein the first stroke segment accounts for more than or equal to 5% of the sum of the first stroke segment and the second stroke segment.

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