CN212591732U

CN212591732U - Hand-held mixer

Info

Publication number: CN212591732U
Application number: CN202020832276.7U
Authority: CN
Inventors: 李祥玉; 张益文
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2020-05-18
Filing date: 2020-05-18
Publication date: 2021-02-26
Anticipated expiration: 2030-05-18

Abstract

The application provides a hand-held mixer. Comprises a mixer shell, a speed regulating button and a circuit board component. The speed regulating button is movably arranged relative to the mixer shell. The circuit board assembly is arranged in the stirrer shell and comprises a circuit board, a circuit arranged on the circuit board, and a sliding potentiometer and a speed regulating switch which are connected in parallel in the circuit, wherein the sliding potentiometer comprises a shifting rod, the speed regulating button is connected with the shifting rod to drive the shifting rod to slide, and the speed regulating button drives the shifting rod to slide in the sliding process to trigger the speed regulating switch to be closed. The scheme can improve the convenience of speed regulation operation.

Description

Hand-held mixer

Technical Field

The application relates to the technical field of small household appliances, in particular to a handheld stirrer.

Background

The speed regulating mechanism of the existing handheld stirrer is realized through a point-moving structure and a rotary structure, the speed regulating operation steps are complex and complicated, and particularly, the convenience of operation can be greatly influenced under the condition that the output rotating speed of a motor needs to be quickly regulated in the food cooking process.

SUMMERY OF THE UTILITY MODEL

The application provides a modified hand-held type mixer can realize the stepless speed governing function of a key operation, has improved the convenience of operation.

A hand-held blender, comprising:

a mixer housing;

the speed regulating button is movably arranged relative to the stirrer shell; and

the circuit board assembly is arranged in the stirrer shell and comprises a circuit board, a circuit arranged on the circuit board, and a sliding potentiometer and a speed regulating switch which are connected in parallel in the circuit, wherein the sliding potentiometer comprises a shifting rod, the speed regulating button is connected with the shifting rod to drive the shifting rod to slide, and the speed regulating button drives the shifting rod to slide in the sliding process to trigger the speed regulating switch to be closed.

Optionally, the speed regulating button comprises a waterproof isolation part, and the waterproof isolation part is arranged between the stirrer shell and the circuit board assembly in an isolation mode. The waterproof isolation part can prevent water entering the stirrer shell from flowing into the circuit board assembly, and the circuit board assembly is protected.

Optionally, the waterproof isolation portion includes a drainage port, and the drainage port is used for water entering the stirrer housing to flow in and be isolated from the circuit board assembly. The drainage mouth can supply the rivers that get into in the mixer shell to can flow out along established water course, avoid the circuit board subassembly to wade.

Optionally, the speed regulating button comprises a button cap and a connecting piece which are arranged in a split mode, one end of the connecting piece is connected with the button cap, and the other end of the connecting piece extends along the sliding direction of the position changing rod and is connected with the position changing rod. The button cap and the connecting piece which are arranged in a split mode can reduce the processing and manufacturing difficulty of the speed regulating button and improve the processing manufacturability.

Optionally, the connecting piece includes a through hole, the shifting rod is inserted into the through hole, and the extending direction of the shifting rod is perpendicular to the sliding direction of the shifting rod. The connecting structure of the connecting piece and the position changing rod is simple, and the dismounting is convenient.

Optionally, the hand-held blender includes a power switch, and the circuit of the circuit board is switched on and off by the power switch. The power switch can play the role of a master control switch, and the safety in the use process is improved.

Optionally, the handheld mixer includes a handheld end, and the power switch and the speed regulation button are disposed on two opposite sides of the handheld end. When a user holds the handheld end, the power switch can be closed, and the switching-on operation of the power switch is facilitated.

Optionally, the handheld mixer further comprises a limiting component, and the limiting component is in limiting fit with the speed regulating button along the direction that the speed regulating button is separated from the mixer shell. The limiting assembly can improve the reliability of the installation of the speed regulating button and avoid the falling of the speed regulating button.

Optionally, the circuit board assembly includes a circuit board box, the circuit board is fixed to the mixer housing through the circuit board box, and the circuit board box is disposed on one side of the circuit board facing the speed adjusting button and includes the limiting assembly. The circuit board box can play the effect of protecting electronic devices on the circuit board, improves the reliability of circuit board work, and the circuit board box is close to the speed regulating button, sets up spacing subassembly and is convenient for more realize with the spacing cooperation of speed regulating button on the circuit board box.

Optionally, the mixer housing includes a housing body and a decoration, the housing body is provided with a mounting hole for mounting the speed regulating button, and the decoration is assembled to the housing body and is shielded at an outer edge of the mounting hole; and/or

The speed regulating button comprises a first return spring, and the speed regulating button is reset through the first return spring in a release state; and/or

The speed regulating button comprises a second return spring, and the speed regulating button is reset through the second return spring in a release state. The decoration can shelter from in the outer border department of mounting hole for promote the pleasing to the eye degree of product. The first return spring and/or the second return spring are/is arranged, so that the speed regulating button can be quickly reset after being released, and the response speed is improved.

Optionally, the sliding potentiometer has a constant resistance value after the speed regulating button triggers the speed regulating switch to be closed, the branch where the sliding potentiometer is located is connected in parallel with the branch where the speed regulating switch is located, or

And the sliding potentiometer is short-circuited after the speed regulating switch is closed. The scheme can make the resistance value in the circuit constant, so that the stirring speed is constant.

Optionally, the resistance value of the circuit board before the speed regulation switch is closed is not equal to the resistance value of the circuit board before the speed regulation switch is closed, and the stirring speed is not equal. The resistance in the circuit is unequal before and after the speed governing switch is closed, can make the mixer have more stirring speed to satisfy the stirring demand of different edible materials in different stages.

The technical scheme provided by the application can at least achieve the following beneficial effects:

the application provides a hand-held type mixer, the speed governing button with the pole that shifts is connected, drives the pole that shifts slides to the resistance of the circuit of change circuit board, thereby can change the stirring speed. Therefore, by pressing the speed regulating button, one-button stepless speed regulation can be realized, and compared with a point-action or rotary speed regulating structure, the speed regulating device is simpler and more convenient to operate. In addition, the speed regulating button can trigger the speed regulating switch to be closed in the process of driving the shifting rod to slide, so that the resistance value in the circuit is constant, and the stirring speed is constant.

Drawings

FIG. 1 is a schematic view of a hand-held blender shown in an exemplary embodiment of the present application;

FIG. 2 is a cross-sectional and exploded view of a portion of the hand blender shown in FIG. 1;

FIG. 3 is a schematic circuit diagram of the slide displacer shown in FIG. 2;

FIG. 4 is an exploded view of the speed knob and circuit board assembly shown in FIG. 2;

FIG. 5 is a schematic view of the connecting tab shown in FIG. 4;

FIG. 6 is a cross-sectional view of a portion of the hand blender shown in FIG. 1;

FIG. 7 is an exploded view of a portion of the hand blender shown in FIG. 1;

FIG. 8 is a further cross-sectional view of a portion of the hand blender shown in FIG. 1.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of "first," "second," and similar terms in the description and claims of this application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Similarly, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one, and if only "a" or "an" is denoted individually. "plurality" or "a number" means two or more. Unless otherwise specified, "front", "back", "lower" and/or "upper", "top", "bottom", and the like are for ease of description only and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Referring to fig. 1, fig. 1 is a schematic view of a hand blender according to an exemplary embodiment of the present application.

The hand-held blender 10 provided by the embodiments of the present application includes a blender housing 11 and a throttle button 12 movably disposed relative to the blender housing 11. By pressing the speed-adjusting button 12, the speed-adjusting button 12 moves into the mixer case 11, and the mixing speed of the hand mixer 10 can be adjusted. In one embodiment, the speed knob 12 protrudes from the exterior surface of the blender housing 11. In other embodiments, the speed knob 12 may be flush with the outer surface of the blender housing 11.

The hand blender 10 includes a hand-held end 10a for a user to grasp when blending food material. At the hand-held end 10a, the blender housing 11 includes a curved surface 11a to increase comfort for palm gripping. The throttle button 12 may be disposed at the hand-held end 10a such that the throttle button 12 is easily operated during whipping. In one embodiment, blender housing 11 is provided with louvers 111 a. The heat dissipation hole 111a may be disposed on the curved surface 11a, but is not limited thereto.

In one embodiment, the hand blender 10 is powered on by connecting to a mains power source via power cord 10 b. In another embodiment, the hand blender 10 may include a power switch 13, and power may be applied to the hand blender 10 after the hand blender 10 is connected to a mains power source via a power cord 10b, and after the power switch 13 is closed. The power switch 13 can play the role of a master control switch, and the safety of the stirrer in the use process is improved.

In the embodiment shown in fig. 1, the power switch 13 is disposed at the handheld end 10a, and the speed-adjusting button 12 and the power switch 13 are disposed at two opposite sides of the handheld end 10a, so that the power switch 13 can be closed while the handheld end 10a is held, thereby facilitating the closing operation of the power switch 13.

Referring to FIG. 2, FIG. 2 is a cross-sectional view and an exploded view of a portion of the hand blender shown in FIG. 1.

The hand blender 10 also includes a circuit board assembly 14, a blending motor 15, and a blending assembly 16 disposed within the blender housing 11. The circuit board assembly 14 includes a circuit board 140, a circuit provided on the circuit board 140, and a slide potentiometer 142 and a speed control switch 144 connected in parallel in the circuit. The circuit on the circuit board 140 is electrically connected to the stirring motor 15 for controlling the rotation speed of the stirring motor 15. One end of the stirring component 16 is positioned in the stirrer shell 11 and is in transmission connection with the stirring motor 15, and the other end is positioned outside the stirrer shell 11. The stirring assembly 16 includes a stirring blade 16 a. The stirring assembly 16 is driven by the stirring motor 15 to rotate, and the food material is stirred by the stirring blade 16 a.

The sliding potentiometer 142 includes a shift lever 142a, the speed-regulating button 12 is connected to the shift lever 142a to drive the shift lever 142a to slide, and the resistance of the circuit board 140 can be changed by changing the position of the shift lever 142a in the sliding potentiometer 142, so that the rotation speed of the stirring motor 15 can be changed. Through pressing speed governing button 12, can realize the stepless speed governing of a key formula, compare in inching type or rotation type speed governing structure, the operation is simpler, convenient.

The governor button 12 can also trigger the governor switch 144 to close during the sliding of the driven shift lever 142 a. In one embodiment, the sliding position shifter 142 has a constant resistance value after the speed button 12 triggers the speed switch 144 to close, and the branch of the sliding position shifter 142 is connected in parallel with the branch of the speed switch 144. If the resistance value of the slide displacer 142 is constant, the resistance value in the circuit is constant, and thus the stirring speed is constant.

In another embodiment, the sliding potentiometer 142 is shorted after the speed button toggles the speed switch 144 closed. After the sliding potentiometer 142 is short-circuited, the resistance value of the circuit board 140 is constant, and the stirring speed is constant.

In one embodiment, the resistance of the circuit board 140 before the speed control switch 144 is closed is not equal to the resistance of the circuit board 140 after the speed control switch 144 is closed, and the stirring speed is not equal. Thus, the stirring speed of the handheld stirrer 10 can be increased to meet the requirements of different food materials for stirring in different stages. For example, a resistor with a corresponding resistance value can be connected to the branch where the speed regulation switch 144 is located, so as to increase or decrease the resistance value in the circuit after the sliding potentiometer 142 is connected in parallel with the speed regulation switch 144, thereby increasing or decreasing the stirring speed. For another example, the branch where the speed adjusting switch 144 is closed may be a conducting wire, so that the resistance of the circuit board 140 is further reduced, and the stirring speed is further increased.

In one embodiment, the throttle button 12 may be provided as a unitary structure. In another embodiment, the speed knob 12 may include a split button cap 120 and a coupling tab 122. The connecting piece 122 has one end connected to the button cap 120 and the other end extending in the sliding direction of the shift lever 142a and connected to the shift lever 142 a. The button cap 120 and the connecting piece 122 are arranged separately, which is beneficial to reducing the processing and manufacturing difficulty of the speed regulating button 12 and improving the processing manufacturability. Optionally, the button cap 120 is removably connected to the connecting tab 122, including but not limited to a snap-fit connection.

Referring to fig. 3, fig. 3 is a schematic circuit diagram of the slide positioner shown in fig. 2.

One end of the sliding position shifter 142 is connected to the live line L of the power supply, and the other end is connected to the stirring motor 15 and to the neutral line N of the power supply. By changing the position of the shift lever 142a in the slide shifter 142, the resistance value in the circuit can be changed, and the rotation speed of the stirring motor 15 can be controlled.

Referring to fig. 4, fig. 4 is an exploded view of the throttle button and circuit board assembly shown in fig. 2.

In one embodiment, the button cap 120 is provided as a shell-shaped structure. The connecting piece 122 includes a first portion 1220 and a second portion 1222 bent opposite to each other. In one embodiment, the first portion 1220 is perpendicular to the second portion 1222, but is not so limited. The first portion 1220 is disposed inside the button cap 120, and is connected with the button cap 120. The second portion 1222 extends in the sliding direction of the shift lever 142a, and is connected to the shift lever 142 a. In one embodiment, the second portion 1222 includes a through hole 1222a, the displacement rod 142a is inserted into the through hole 1222a, and the displacement rod 142a extends in a direction perpendicular to a sliding direction of the displacement rod 142 a. This makes the connection structure of the connection piece 122 and the displacement rod 142a simple, and facilitates the disassembly and assembly.

In one embodiment, the speed button 12 includes a first return spring 121, and the first return spring 121 can return the button cap 120 and the connecting piece 122 when the speed button 12 is released. In one embodiment, the first return spring 121 comprises a compression spring. Specifically, the connecting sheet 122 includes a positioning post 1224 disposed on the first portion 1220, one end of the first return spring 121 is disposed outside the positioning post 1224, and the other end abuts against the circuit board assembly 14. When the speed regulating button 12 is pressed, the first return spring 121 compresses and stores energy, and after the speed regulating button 12 is released, the first return spring recovers to deform and releases energy to drive the speed regulating button 12 to reset.

Referring to fig. 5, fig. 5 is a schematic view of the connecting sheet shown in fig. 4.

In one embodiment, the speed knob 12 includes a waterproof isolator 124, the waterproof isolator 124 being disposed in isolation between the blender housing 11 and the circuit board assembly 14. The waterproof partition 124 prevents water that enters the blender housing 11 from flowing into the circuit board assembly 14, and serves to protect the circuit board assembly 14. In one embodiment, the waterproof spacer 124 is disposed on the second portion 1222 and protrudes along the extending direction of the positioning rod 142a, and is located at the left side of the through hole 1222 a. In this way, the displacement rod 142a is isolated to the right of the waterproof isolating portion 124, thereby preventing water from entering the circuit board assembly 14 from the slide displacer 142. In other embodiments, the position of the waterproof partition 124 may be adjusted according to the position of the shift lever 142a, not limited to the left side.

Further, the waterproof partition portion 124 includes a drainage port 124a, and the drainage port 124a allows water entering the mixer case 11 to flow in and to flow out along a predetermined water passage, and is isolated from the circuit board assembly 14. The vents 124a may direct the direction of water flow to avoid wading the circuit board assembly 14.

Referring to FIG. 6, FIG. 6 is a cross-sectional view and an exploded view of a portion of the hand blender shown in FIG. 1.

The speed regulating button 12 comprises a second return spring 123, and after the speed regulating button 12 is released, the second return spring 123 can drive the speed regulating button 12 to reset. Specifically, the button cap 120 includes a pressing rod 1200, and the pressing rod 1200 is used for contacting the speed regulating switch 144 to trigger the speed regulating switch 144 to close. The second return spring 123 is sleeved on the pressing rod 1200 and abuts against the circuit board assembly 14.

In the embodiment shown in fig. 6, the speed knob 12 includes a first return spring 121 and a second return spring 123. After the speed regulating button 12 is released, the first return spring 121 and the second return spring 123 can drive the speed regulating button 12 to reset together, so that the acting force during resetting is increased. And, the balance when the speed regulating button 12 moves is ensured.

Referring to FIG. 7, FIG. 7 is an exploded view of a portion of the hand blender shown in FIG. 1.

In one embodiment, the circuit board assembly 14 further includes a circuit board box 146, and the circuit board box 146 is disposed on a side of the circuit board 140 facing the throttle button 12. The circuit board box 146 may protect the electronic devices disposed on the circuit board 140, such as the slide positioner 142 and the speed control switch 144. The circuit board 140 may also be held in fixed relation to the blender housing 11 by a circuit board box 146.

The circuit board cassette 146 includes a first guard portion 1460. In one embodiment, the first guard portion 1460 includes a hollow frame 1460a, the slide positioner 142 is disposed in a cavity 1460c of the frame 1460a, and the displacement rod 142a extends from the cavity 1460c and is connected to the connecting link 122. The first protection part 1460 further includes a positioning boss 1460b provided at a front end of the frame 1460a, and two ends of the first return spring 121 are respectively positioned on the positioning boss 1460b and the positioning post 1224.

The circuit board cassette 146 includes a second shield 1462. In one embodiment, the second guard 1462 includes a sleeve 1462a, the speed switch 144 is disposed within the sleeve 1462a, and the plunger 1220 contacts the speed switch 144 through a cavity 1462d of the sleeve 1462 a. The second return spring 123 is positioned within the sleeve 1462 a. The remainder of the circuit board 140 is encased within a circuit board case 146.

The hand blender 10 further includes a limit assembly 1462b, the limit assembly 1462b engaging the speed knob 12 in a limited manner in a direction in which the speed knob 12 is removed from the blender housing 11. The limiting component 1462b can improve the reliability of the speed regulating button 12 and prevent the speed regulating button 12 from falling off. In one embodiment, the circuit board cassette 146 includes the spacing assembly 1462 b. The circuit board box 146 is close to the speed regulating button 12, so that the speed regulating button 12 is in limit fit with the circuit board box 146 conveniently. Specifically, the limiting component 1462b includes a locking pin disposed on the outer wall of the sleeve 1462a, and the speed adjusting button 12 is matched with the locking pin for limiting before being released from the mixer housing 11. Optionally, the sleeve 1462a is provided with notches 1462c on two sides of the clamping leg for increasing the elasticity of the clamping leg and reducing the clamping difficulty. It should be noted that the restraining assembly 1462b is not limited to the form of a catch.

In one embodiment, the blender housing 11 comprises a housing body 110 and a decoration piece 112, the housing body 110 is provided with a mounting hole 110a for mounting the speed regulating button 12, and the decoration piece 112 is assembled on the housing body 110a and is shielded at the outer edge of the mounting hole 110 a. The decoration 112 may improve the degree of appearance.

In one embodiment, the decoration 112 includes an inner decoration 112a and an outer decoration 112b, and the inner decoration 112a is connected to the housing body 110 by a connection method including, but not limited to, snap-fitting. The outer trim 112b covers over the inner trim 112a and is attached to the inner trim 112a in a manner including, but not limited to, snap-fit.

In one embodiment, the housing body 110 includes a first housing 1100 and a second housing 1102 which are separately arranged, and the first housing 1100 is connected with the second housing 1102 to form a receiving cavity for receiving the circuit board assembly 14 and the stirring motor 15 therein. In one embodiment, the throttle button 12 protrudes from the first housing 1100, and the power switch 13 protrudes from the second housing 1102 and is disposed opposite to the first housing. The first housing 1100 is detachably coupled to the second housing 1102.

Referring to fig. 8, fig. 8 is a further cross-sectional view of a portion of the hand blender shown in fig. 1.

The circuit board cassette 146 further includes a guide portion 1464 and the button cap 120 includes a slide slot 1202 in sliding engagement with the guide portion 1464. Therefore, when the speed control button 12 drives the shift lever 142a to slide, the slide groove 1202 is engaged with the guide portion 1464, and the smoothness of the sliding of the shift lever 142a can be ensured.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A hand-held blender, comprising:

a mixer housing (11);

a speed regulating button (12) which is movably arranged relative to the mixer shell (11); and

the circuit board assembly (14) is arranged in the stirrer shell (11) and comprises a circuit board (140), a circuit arranged on the circuit board (140), a sliding potentiometer (142) and a speed regulating switch (144), wherein the sliding potentiometer (142) and the speed regulating switch (144) are connected in parallel in the circuit, the sliding potentiometer (142) comprises a position changing rod (142a), the speed regulating button (12) is connected with the position changing rod (142a) and drives the position changing rod (142a) to slide, and the speed regulating button (12) drives the sliding process of the position changing rod (142a) to trigger the speed regulating switch (144) to be closed.

2. A hand mixer according to claim 1, characterised in that the speed button (12) includes a water-tight barrier (124), the water-tight barrier (124) being arranged in isolation between the mixer housing (11) and the circuit board assembly (14).

3. A hand mixer according to claim 2, characterised in that the water-tight barrier (124) includes a drainage opening (124a), the drainage opening (124a) allowing water entering the mixer housing (11) to flow in, being isolated from the circuit board assembly (14).

4. A hand mixer according to any of claims 1-3, characterised in that the speed button (12) comprises a button cap (120) and a connecting piece (122) which are arranged separately, one end of the connecting piece (122) is connected to the button cap (120), and the other end extends along the sliding direction of the position changing rod (142a) and is connected to the position changing rod (142 a).

5. A hand mixer according to claim 4, in which the coupling piece (122) comprises a through hole (1222a), the indexing lever (142a) being inserted in the through hole (1222a), the indexing lever (142a) extending in a direction perpendicular to the sliding direction of the indexing lever (142 a).

6. A hand mixer according to any of claims 1 to 3, characterised in that the hand mixer includes a power switch (13), and the electrical circuit of the circuit board (140) is switched on and off via the power switch (13).

7. A hand-held mixer according to claim 6, characterised in that the hand-held mixer (10) comprises a hand-held terminal (10a), and the power switch (13) and the speed button (12) are arranged on opposite sides of the hand-held terminal (10 a).

8. A hand mixer according to any of claims 1 to 3, characterised in that the hand mixer (10) further comprises a limit stop assembly (1462b), the limit stop assembly (1462b) engaging the speed button (12) in a limit stop in the direction in which the speed button (12) exits the mixer housing (11).

9. A hand mixer according to claim 8, characterised in that the circuit board assembly (14) includes a circuit board box (146), the circuit board (140) being held stationary relative to the mixer housing (11) by means of the circuit board box (146), the circuit board box (146) being disposed on a side of the circuit board (140) facing the speed button (12) and including the limit stop assembly (1462 b).

10. A hand mixer according to any of claims 1 to 3, characterised in that the mixer housing (11) comprises a housing body (110) and a decorative member (112), the housing body (110) is provided with a mounting hole (110a) for mounting the speed regulating button (12), the decorative member (112) is assembled to the housing body (110) and is shielded at the outer edge of the mounting hole (110 a); and/or

The speed regulating button (12) comprises a first return spring (121), and the speed regulating button (12) is reset through the first return spring (121) in a release state; and/or

The speed regulating button (12) comprises a second return spring (123), and the speed regulating button (12) is reset through the second return spring (123) in a release state.

11. A hand mixer according to any of claims 1 to 3, characterised in that the sliding potentiometer (142) has a constant resistance when the speed regulating button (12) triggers the speed regulating switch (144) to close, and the branch in which the sliding potentiometer (142) is located is connected in parallel with the branch in which the speed regulating switch (144) is located, or

The sliding potentiometer (142) is short-circuited after the speed regulating button (12) triggers the speed regulating switch (144) to be closed.

12. A hand mixer according to any of claims 1 to 3, in which the resistance of the circuit on the circuit board (140) before the speed control switch (144) is closed is not equal to the resistance of the circuit on the circuit board (140) after the speed control switch (144) is closed, and the mixing speed is not equal.