Adjustable speed handheld milk frother

Abstract

The utility model provides a hand-held milk frothing machine with adjustable speed, which relates to the technical field of milk frothing machine equipment, including a shell structure and a stirring structure, a rotating speed regulating structure and a driving structure connected to the shell structure, wherein a housing space is provided in the shell structure, and the housing space is used to accommodate the rotating speed regulating structure and the driving structure; the output end of the driving structure is connected to the stirring structure to drive the stirring structure to rotate; the rotating speed regulating structure includes a speed regulating knob and a rotating switch mechanism, and the rotating switch mechanism is electrically connected to the driving structure; the speed regulating knob is connected to a resistor component of the rotating switch mechanism, and the speed regulating knob is used to adjust the resistance value of the resistor component by rotating, thereby adjusting the speed of the output end of the driving structure. The utility model alleviates the technical problems existing in the prior art that the speed is controlled by pressing a start button with a finger, which causes inconvenience in operation when stirring while adjusting the speed, and the inability to adjust the angle of the coffee cup when operating with both hands.

Description

Technical Field

[0001] The utility model relates to the technical field of milk frothing machine equipment, in particular to a speed-adjustable handheld milk frothing machine. Background Art

[0002] As people's living standards improve, they pay more attention to diet. When drinking coffee and milk, people like to make milk foam. The tiny milk foam bursts in the mouth, and the coffee, milk and milk foam combine in the mouth, forming a unique taste and flavor that is soft, bitter and has some milky flavor.

[0003] A milk frother is needed to make milk froth. The milk frother is a device for stirring and whipping milk to produce liquid foam. The milk is whipped by continuously rotating and stirring the stirring frame at a high speed. Existing milk frothers are usually large in size, heavy, and inconvenient to install.

[0004] The existing handheld milk frother is usually started and the speed is adjusted by pressing a button on the handle. If the user wants to adjust the speed during use, the user needs to adjust the degree of pressing the button, which is inconvenient; or the user needs to adjust it with the other hand, which makes it impossible to adjust the angle of the coffee cup, affecting the foaming effect. Utility Model Content

[0005] The utility model aims to provide a handheld milk frother with adjustable speed, so as to alleviate the technical problems existing in the prior art that the speed is controlled by pressing a start button with a finger, which causes inconvenience in operating the machine while adjusting the speed and stirring the machine, and the angle of the coffee cup cannot be adjusted when operated with both hands.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, the utility model provides a hand-held milk frother with adjustable speed, comprising a shell structure and a stirring structure, a rotating speed regulating structure and a driving structure connected to the shell structure, wherein a housing space is provided in the shell structure, and the housing space is used to accommodate the rotating speed regulating structure and the driving structure;

[0008] The output end of the driving structure is connected to the stirring structure to drive the stirring structure to rotate;

[0009] The rotary speed regulating structure comprises a speed regulating knob and a rotary switch mechanism, and the rotary switch mechanism is electrically connected to the driving structure;

[0010] The speed regulating knob is connected to the resistance component of the rotary switch mechanism, and the speed regulating knob is used to adjust the resistance value of the resistance component by rotating, thereby adjusting the rotation speed of the output end of the driving structure.

[0011] Further, the rotary switch mechanism also includes a rotary joint and a contact brush;

[0012] The resistor component includes a first pin, a second pin and a third pin;

[0013] One end of the rotary joint is connected to the speed regulating knob, and the other end is connected to the contact brush via an adjusting shaft, and the adjusting shaft is connected to the circuit of the rotary switch mechanism to realize power supply;

[0014] The contact brush is connected to the second pin;

[0015] The first pin and the third pin are both connected to the pins of the rotary switch mechanism, and a resistor is provided between the first pin and the third pin;

[0016] The first pin, the second pin and the third pin are all electrically connected to the driving structure, and the contact brush is used to drive the second pin to slide on the resistor to change the current value between the second pin and the third pin, thereby allowing the driving structure to adjust the rotation speed of its output end according to the change in the current value.

[0017] Furthermore, the rotary switch mechanism further comprises a cam and a pressure spring, and the cam is rotatably connected to the housing of the rotary switch mechanism;

[0018] The pressure spring is connected to the cam, and one end of the pressure spring is electrically connected to the circuit of the rotary switch mechanism, and the other end abuts against the raised portion of the cam;

[0019] The contact brush is provided with an abutment portion, and the abutment portion abuts against the protrusion portion. The contact brush is rotated to separate the abutment portion from the protrusion portion, thereby separating the end of the pressure spring from the protrusion portion and connecting to the adjustment shaft to be energized.

[0020] Further, the driving structure includes a PCBA board assembly, a battery and a motor, the PCBA board assembly is electrically connected to the rotary switch mechanism, and the PCBA board assembly and the motor are arranged inside the housing structure;

[0021] The battery is electrically connected to the PCBA board assembly;

[0022] The motor is electrically connected to the PCBA board assembly, and an output end of the motor is connected to the stirring structure.

[0023] Further, the PCBA board assembly includes a first PCBA board and a second PCBA board, and the first PCBA board is connected to the second PCBA board;

[0024] The first PCBA board is connected to the rotary switch mechanism;

[0025] The second PCBA board is electrically connected to the battery, and the second PCBA board is provided with a charging unit.

[0026] Further, the shell structure comprises an outer shell, an inner shell assembly, a top cover and a bottom cover assembly, the outer shell is sleeved on the outside of the inner shell assembly, one end of the inner shell assembly is connected to the top cover, and the other end is connected to the bottom cover assembly, and the inner shell assembly is provided with the accommodating space;

[0027] One end of the bottom cover assembly away from the inner housing assembly is rotatably connected to the speed regulating knob.

[0028] Further, the inner shell assembly comprises an upper cover body and a lower cover body connected to each other, one end of the lower cover body is connected to the top cover, and the upper cover body and the lower cover body are arranged to form the accommodating space;

[0029] The bottom cover assembly is respectively connected to the upper cover body and the lower cover body at one end away from the top cover;

[0030] The upper cover body is provided with a charging port, and the charging port is electrically connected to the second PCBA board;

[0031] A waterproof ring is provided at one end of the lower cover body away from the bottom cover assembly, and the waterproof ring is used to seal the gap between the lower cover body and the top cover.

[0032] Further, the bottom cover assembly includes a blocking member and a fixing member, the blocking member is connected to the fixing member, and the blocking member is connected to the rotary switch mechanism;

[0033] The blocking member is connected to the upper cover body and the lower cover body respectively, and the blocking member is rotatably connected to the speed regulating knob.

[0034] Furthermore, a connecting piece is provided in the top cover, one end of the connecting piece is connected to the output end of the motor, and the other end is connected to the stirring structure.

[0035] Furthermore, the stirring structure includes a stirring rod and a stirring head, one end of the stirring rod is connected to the output end of the driving structure, and the other end is connected to the stirring head.

[0036] The utility model can achieve the following beneficial effects:

[0037] In the first aspect, the utility model provides an adjustable speed handheld milk frother, comprising a shell structure and a stirring structure, a rotating speed regulating structure and a driving structure connected to the shell structure, wherein a housing space is provided in the shell structure, and the housing space is used to accommodate the rotating speed regulating structure and the driving structure; the output end of the driving structure is connected to the stirring structure to drive the stirring structure to rotate; the rotating speed regulating structure comprises a speed regulating knob and a rotating switch mechanism, and the rotating switch mechanism is electrically connected to the driving structure; the speed regulating knob is connected to a resistance component of the rotating switch mechanism, and the speed regulating knob is used to adjust the resistance value of the resistance component by rotating, thereby adjusting the rotation speed of the output end of the driving structure.

[0038] In the utility model, the stirring structure, the rotary speed regulating structure and the driving structure are all connected to the shell structure, and the output end of the driving structure is connected to the stirring structure to drive the stirring structure to rotate; and the rotary speed regulating structure and the driving structure are electrically connected. When in use, the speed regulating knob of the rotary speed regulating structure is rotated to adjust the resistance value of the resistor component, thereby changing the current value measured by the PCBA board assembly to achieve the effect of adjusting the output end rotation speed of the driving structure.

[0039] Compared with the prior art, the adjustable speed handheld milk frother provided by the utility model can change the resistance value of the resistor component by rotating the speed control knob located at the end of the handheld milk frother, thereby realizing the PCBA board assembly controlling the rotation speed of the motor according to the change of the measured current value, thereby realizing the function of changing the rotation speed of the stirring structure by rotating the speed control knob.

[0040] In summary, the utility model at least alleviates the technical problems existing in the prior art of controlling the rotation speed by pressing the start button with a finger, which causes inconvenience in operating while adjusting the speed and stirring, and the inability to adjust the angle of the coffee cup when operating with both hands. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of the main structure of a speed-adjustable handheld milk frother provided by an embodiment of the utility model;

[0043] Figure 2 A schematic diagram of the exploded structure of the adjustable speed handheld milk frother provided by the embodiment of the utility model;

[0044] Figure 3An exploded schematic diagram of the internal structure of the adjustable speed handheld milk frother provided by an embodiment of the utility model;

[0045] Figure 4 A schematic diagram of the front structural view of a rotary switch mechanism of a speed-adjustable handheld milk frother provided in an embodiment of the utility model;

[0046] Figure 5 A bottom view structural diagram of a rotary switch mechanism of a handheld milk frother with adjustable speed provided by an embodiment of the utility model;

[0047] Figure 6 A schematic diagram of resistance adjustment of a rotary switch mechanism of a speed-adjustable handheld milk frother provided in an embodiment of the utility model.

[0048] Icons: 1-shell structure; 11-outer shell; 12-inner shell assembly; 121-upper cover; 1211-charging port; 122-lower cover; 1221-waterproof ring; 13-top cover; 131-connector; 14-bottom cover assembly; 141-sealing piece; 142-fixing piece; 2-stirring structure; 21-stirring rod; 22-stirring head; 3-rotating speed control structure; 31-speed control knob; 32-rotating switch mechanism; 321-rotating joint; 322-contact brush; 323-cam; 324-pressure spring; 325-first pin; 326-second pin; 327-third pin; 4-driving structure; 41-PCBA board assembly; 411-first PCBA board; 412-second PCBA board; 42-battery; 43-motor. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0052] In the description of the present utility model, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0053] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0054] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0056] Embodiment 1

[0057] This embodiment provides a handheld milk frother with adjustable speed. Figure 1 The adjustable speed handheld milk frother comprises a shell structure 1 and a stirring structure 2, a rotating speed regulating structure 3 and a driving structure 4 connected to the shell structure 1. An accommodating space is provided in the shell structure 1, and the accommodating space is used to accommodate the rotating speed regulating structure 3 and the driving structure 4; the output end of the driving structure 4 is connected to the stirring structure 2 to drive the stirring structure 2 to rotate; the rotating speed regulating structure 3 comprises a speed regulating knob 31 and a rotating switch mechanism 32, and the rotating switch mechanism 32 is electrically connected to the driving structure 4; the speed regulating knob 31 is connected to the resistance component of the rotating switch mechanism 32, and the speed regulating knob 31 is used to adjust the current value of the resistance component by rotating, thereby adjusting the rotation speed of the output end of the driving structure 4.

[0058] The embodiments of the utility model at least alleviate the technical problems existing in the prior art of controlling the rotation speed by pressing a start button with a finger, which causes inconvenience in operating while adjusting the speed and stirring, and the inability to adjust the angle of the coffee cup when operating with both hands.

[0059] In an embodiment of the utility model, the stirring structure 2, the rotating speed regulating structure 3 and the driving structure 4 are all connected to the shell structure 1, and the output end of the driving structure 4 is connected to the stirring structure 2 to drive the stirring structure 2 to rotate; and the rotating speed regulating structure 3 and the driving structure 4 are electrically connected. When in use, the speed regulating knob 31 of the rotating speed regulating structure 3 is rotated to adjust the resistance value of the resistor component, thereby changing the current value measured by the PCBA board assembly 41 to achieve the effect of adjusting the output end rotation speed of the driving structure 4.

[0060] Compared with the prior art, the adjustable speed handheld milk frother provided in the embodiment of the utility model can change the resistance value of the resistor component by rotating the speed control knob 31 located at the end of the handheld milk frother, thereby realizing the PCBA board assembly 41 controlling the rotation speed of the motor 43 according to the change of the measured current value, thereby realizing the function of changing the rotation speed of the stirring structure 2 by rotating the speed control knob 31.

[0061] In an optional implementation manner of this embodiment, refer to Figure 4 , Figure 5 or Figure 6 , the rotary switch mechanism 32 also includes a rotary joint 321 and a contact brush 322; the resistor component includes a first pin 325, a second pin 326 and a third pin 327; one end of the rotary joint 321 is connected to the speed knob 31, and the other end is connected to the contact brush 322 through an adjusting shaft, and the adjusting shaft is connected to the circuit of the rotary switch mechanism 32 to achieve power supply; the contact brush 322 is connected to the second pin 326; the first pin 325 and the third pin 327 are both connected to the pins of the rotary switch mechanism 32, and a resistor is provided between the first pin 325 and the third pin 327; the first pin 325, the second pin 326 and the third pin 327 are all electrically connected to the drive structure 4, and the contact brush 322 is used to drive the second pin 326 to slide on the resistor to change the current value between the second pin 326 and the third pin 327, so that the drive structure 4 adjusts the speed of its output end according to the change of this current value.

[0062] Specifically: the rotary joint 321 is connected to the adjustment shaft, and the rotary joint 321 is connected to the speed control knob 31. The user drives the adjustment shaft and the contact brush 322 connected thereto to rotate by turning the speed control knob 31; and the contact brush 322 and the adjustment shaft are both connected to the second pin 326. When the second pin 326 is driven to move between the first pin 325 and the third pin 327, the resistance value changes with the position of the second pin 326, thereby causing the current value detected by the PCBA board assembly 41 to change, and the rotation speed of the motor 43 is adjusted according to the change in the current value, thereby adjusting the rotation speed of the stirring structure 2.

[0063] Further, refer to Figure 5 The rotary switch mechanism 32 also includes a cam 323 and a pressure spring 324. The cam 323 is rotatably connected to the housing of the rotary switch mechanism 32. The pressure spring 324 is connected to the cam 323, and one end of the pressure spring 324 is electrically connected to the circuit of the rotary switch mechanism 32, and the other end abuts against the raised portion of the cam 323. The contact brush 322 is provided with an abutting portion, and the abutting portion abuts against the raised portion. The contact brush 322 is rotated to separate the abutting portion from the raised portion, thereby separating the end of the pressure spring 324 from the raised portion and connecting it to the adjusting shaft to be energized.

[0064] Specifically: the cam 323 is rotatably connected to the housing of the rotary switch mechanism 32, and one end of the pressure spring 324 is connected to the circuit and is wound to form an annular structure, which is sleeved on the cam 323, and the other end thereof abuts against the raised portion of the cam 323. When the pressure spring 324 abuts against the raised portion, the pressure spring 324 is in an elastically tightened state; and the bottom of the raised portion is abutted and supported by a groove provided on the top of the contact brush 322. When the contact brush 322 is rotated, the groove separates from the raised portion, thereby causing the cam 323 to rotate, and the pressure spring 324 elastically recovers, and the end thereof abutting against the raised portion abuts against the adjusting shaft, thereby energizing the second pin 326, and at this time a circuit path is realized.

[0065] Further, refer to Figure 3 The driving structure 4 includes a PCBA board assembly 41, a battery 42 and a motor 43. The PCBA board assembly 41 is electrically connected to the rotary switch mechanism 32, and the PCBA board assembly 41 and the motor 43 are arranged inside the shell structure 1; the battery 42 is electrically connected to the PCBA board assembly 41; the motor 43 is electrically connected to the PCBA board assembly 41, and the output end of the motor 43 is connected to the stirring structure 2.

[0066] Specifically: the PCBA board assembly 41 is electrically connected to the rotary switch mechanism 32, and the capacitance value of the rotary switch mechanism 32 is adjusted by rotating the speed control knob 31, so that the PCBA board assembly 41 controls the rotation speed of the output end of the motor 43 according to the different detected current values, thereby determining the rotation speed of the stirring structure 2.

[0067] Further, refer to Figure 3 The PCBA board assembly 41 includes a first PCBA board 411 and a second PCBA board 412, the first PCBA board 411 is connected to the second PCBA board 412; the first PCBA board 411 is connected to the rotary switch mechanism 32; the second PCBA board 412 is electrically connected to the battery 42, and the second PCBA board 412 is provided with a charging unit.

[0068] Specifically: the first PCBA board 411 is connected to the second PCBA board 412, and the first PCBA board 411 is electrically connected to the rotary switch mechanism 32. The first PCBA board 411 is used to detect the current value of the rotary switch mechanism 32, and the first PCBA board 411 is electrically connected to the second PCBA board 412, so that the second PCBA board 412 controls the speed of the motor 43 according to the current value; and the second PCBA board 412 is provided with a charging unit, which is used to connect to an external power supply device and supply power to the battery 42.

[0069] Further, refer to Figure 2 The shell structure 1 includes an outer shell 11, an inner shell assembly 12, a top cover 13 and a bottom cover assembly 14. The outer shell 11 is sleeved on the outside of the inner shell assembly 12, and one end of the inner shell assembly 12 is connected to the top cover 13, and the other end is connected to the bottom cover assembly 14. The inner shell assembly 12 is provided with an accommodating space; one end of the bottom cover assembly 14 away from the inner shell assembly 12 is rotatably connected to the speed regulating knob 31.

[0070] Specifically: the inner shell component 12 is arranged in the outer shell 11, and the outer shell 11 is preferably a metal shell, and a top cover 13 and a bottom cover component 14 are respectively provided at both ends of the outer shell 11 and the inner shell component 12 to form an accommodating space therein; and the end of the bottom cover component 14 away from the inner shell component 12 is rotatably connected to the speed regulating knob 31, so that the speed regulating knob 31 can rotate relative to the bottom cover component 14 to drive the rotating joint 321 to rotate.

[0071] Further, refer to Figure 2The inner shell assembly 12 includes an upper cover body 121 and a lower cover body 122 which are connected to each other, one end of the lower cover body 122 is connected to the top cover 13, and the upper cover body 121 and the lower cover body 122 are surrounded to form an accommodating space; the bottom cover assembly 14 is respectively connected to the upper cover body 121 and the lower cover body 122 at one end away from the top cover 13; the upper cover body 121 is provided with a charging port 1211, and the charging port 1211 is electrically connected to the second PCBA board 412; the lower cover body 122 is provided with a waterproof ring 1221 at one end away from the bottom cover assembly 14, and the waterproof ring 1221 is used to seal the gap between the lower cover body 122 and the top cover 13.

[0072] Specifically: the upper cover 121 and the lower cover 122 are preferably snap-connected, and the upper cover 121 and the lower cover 122 are connected to form an accommodating space, and the bottoms of the upper cover 121 and the lower cover 122 are connected through the bottom cover assembly 14, and the top of the lower cover 122 is connected to the top cover 13, and at least two waterproof rings 1221 are provided on the top of the lower cover 122 to seal the gap between the lower cover 122 and the top cover 13. Preferably, the upper cover 121 is provided with a charging port 1211, which is used to charge the charging port 1211 through an external charging device, thereby realizing charging of the battery 42 through the second PCBA board 412.

[0073] Further, refer to Figure 2 The bottom cover assembly 14 includes a blocking member 141 and a fixing member 142, the blocking member 141 is connected to the fixing member 142, and the blocking member 141 is connected to the rotary switch mechanism 32; the blocking member 141 is respectively connected to the upper cover body 121 and the lower cover body 122, and the blocking member 141 is rotatably connected to the speed regulating knob 31.

[0074] Specifically, the blocking member 141 is connected to the fixing member 142 , and the blocking member 141 is connected to the rotary switch mechanism 32 ; and the blocking member 141 may be a plastic member, so that the indicator light on the PCBA board assembly 41 can pass through the blocking member 141 .

[0075] In an optional implementation manner of this embodiment, refer to Figure 2 A connecting piece 131 is provided in the top cover 13 , one end of the connecting piece 131 is connected to the output end of the motor 43 , and the other end is connected to the stirring structure 2 .

[0076] Specifically: a connector 131 is provided in the top cover 13 , and one end of the connector 131 is connected to the output end of the motor 43 , and the other end is connected to the stirring structure 2 ; and preferably, the top cover 13 is threadedly connected to the lower cover body 122 .

[0077] In an optional implementation manner of this embodiment, refer to Figure 2 The stirring structure 2 includes a stirring rod 21 and a stirring head 22 . One end of the stirring rod 21 is connected to the output end of the driving structure 4 , and the other end is connected to the stirring head 22 .

[0078] Specifically, one end of the stirring rod 21 is connected to the output end of the driving structure 4, and the other end is connected to the stirring head 22; and preferably, the stirring head 22 can be in a scattered shape to facilitate stirring of items such as coffee.

[0079] It should be noted that the speed range of the handheld milk frother is 4500-10000R / MIN. In the low speed range of 4500-6000 rpm, it can be used to stir juice, protein powder, milk, milk tea powder, chocolate powder, etc.; the medium speed (6000-8000) is used to whip dense milk foam to make milk coffee, and stir some jams, cereals, complementary foods, etc.; the high speed (8000-10000) is used to whip thick milk foam to make cream, cappuccino or stir egg white.

[0080] Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other; the above embodiments in this specification are only used to illustrate the technical solution of the utility model, rather than to limit it; although the utility model is described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that: it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A speed-adjustable handheld milk frother, characterized in that: The invention comprises a shell structure (1), and a stirring structure (2), a rotation speed regulating structure (3) and a driving structure (4) connected to the shell structure (1); a housing space is provided in the shell structure (1), and the housing space is used to accommodate the rotation speed regulating structure (3) and the driving structure (4); The output end of the driving structure (4) is connected to the stirring structure (2) so as to drive the stirring structure (2) to rotate; The rotary speed regulating structure (3) comprises a speed regulating knob (31) and a rotary switch mechanism (32), and the rotary switch mechanism (32) is electrically connected to the driving structure (4); The speed regulating knob (31) is connected to the resistance component of the rotary switch mechanism (32), and the speed regulating knob (31) is used to adjust the resistance value of the resistance component by rotating, thereby adjusting the rotation speed of the output end of the driving structure (4).

2. The adjustable speed handheld milk frother according to claim 1, characterized in that: The rotary switch mechanism (32) further comprises a rotary joint (321) and a contact brush (322); The resistor component includes a first pin (325), a second pin (326) and a third pin (327); One end of the rotary joint (321) is connected to the speed regulating knob (31), and the other end is connected to the contact brush (322) via an adjusting shaft, and the adjusting shaft is connected to the circuit of the rotary switch mechanism (32) to achieve power supply; The contact brush (322) is connected to the second pin (326); The first pin (325) and the third pin (327) are both connected to the pins of the rotary switch mechanism (32), and a resistor is provided between the first pin (325) and the third pin (327); The first pin (325), the second pin (326) and the third pin (327) are all electrically connected to the driving structure (4); the contact brush (322) is used to drive the second pin (326) to slide on the resistor to change the current value between the second pin (326) and the third pin (327), thereby enabling the driving structure (4) to adjust the rotation speed of its output end according to the change in the current value.

3. The adjustable speed handheld milk frother according to claim 2, characterized in that: The rotary switch mechanism (32) further comprises a cam (323) and a pressure spring (324); the cam (323) is rotatably connected to a housing of the rotary switch mechanism (32); The pressure spring (324) is connected to the cam (323), and one end of the pressure spring (324) is electrically connected to the circuit of the rotary switch mechanism (32), and the other end abuts against the raised portion of the cam (323); The contact brush (322) is provided with an abutment portion, and the abutment portion abuts against the protrusion. The contact brush (322) is used to rotate to separate the abutment portion from the protrusion, thereby separating the end of the pressure spring (324) from the protrusion and connecting it to the adjustment shaft to be energized.

4. The adjustable speed handheld milk frother according to claim 3, characterized in that: The driving structure (4) comprises a PCBA board assembly (41), a battery (42) and a motor (43); the PCBA board assembly (41) is electrically connected to the rotary switch mechanism (32); and the PCBA board assembly (41) and the motor (43) are arranged inside the housing structure (1); The battery (42) is electrically connected to the PCBA board assembly (41); The motor (43) is electrically connected to the PCBA board assembly (41), and an output end of the motor (43) is connected to the stirring structure (2).

5. The adjustable speed handheld milk frother according to claim 4, characterized in that: The PCBA board assembly (41) comprises a first PCBA board (411) and a second PCBA board (412), wherein the first PCBA board (411) is connected to the second PCBA board (412); The first PCBA board (411) is connected to the rotary switch mechanism (32); The second PCBA board (412) is electrically connected to the battery (42), and the second PCBA board (412) is provided with a charging unit.

6. The adjustable speed handheld milk frother according to claim 5, characterized in that: The housing structure (1) comprises an outer housing (11), an inner housing component (12), a top cover (13) and a bottom cover component (14); the outer housing (11) is sleeved on the outside of the inner housing component (12); one end of the inner housing component (12) is connected to the top cover (13), and the other end is connected to the bottom cover component (14); the inner housing component (12) is provided with the accommodating space; One end of the bottom cover assembly (14) away from the inner housing assembly (12) is rotatably connected to the speed regulating knob (31).

7. The adjustable speed handheld milk frother according to claim 6, characterized in that: The inner shell assembly (12) comprises an upper cover body (121) and a lower cover body (122) connected to each other, one end of the lower cover body (122) is connected to the top cover (13), and the upper cover body (121) and the lower cover body (122) are arranged to form the accommodating space; The bottom cover assembly (14) is respectively connected to one end of the upper cover body (121) and the lower cover body (122) away from the top cover (13); The upper cover (121) is provided with a charging port (1211), and the charging port (1211) is electrically connected to the second PCBA board (412); A waterproof ring (1221) is provided at one end of the lower cover body (122) away from the bottom cover assembly (14), and the waterproof ring (1221) is used to seal the gap between the lower cover body (122) and the top cover (13).

8. The adjustable speed handheld milk frother according to claim 7, characterized in that: The bottom cover assembly (14) comprises a blocking member (141) and a fixing member (142), the blocking member (141) being connected to the fixing member (142), and the blocking member (141) being connected to the rotary switch mechanism (32); The blocking member (141) is respectively connected to the upper cover body (121) and the lower cover body (122), and the blocking member (141) is rotationally connected to the speed regulating knob (31).

9. The adjustable speed handheld milk frother according to claim 6, characterized in that: A connecting piece (131) is provided inside the top cover (13), one end of the connecting piece (131) is connected to the output end of the motor (43), and the other end is connected to the stirring structure (2).

10. The speed-adjustable handheld milk frother according to any one of claims 1 to 9, characterized in that: The stirring structure (2) comprises a stirring rod (21) and a stirring head (22); one end of the stirring rod (21) is connected to the output end of the driving structure (4), and the other end is connected to the stirring head (22).

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