A hand-held blender

Abstract

The present invention relates to the field of food processors and discloses a hand-held blender. The key technical points of its technical solution include a main body mechanism, a housing, and a tube connected to the housing. The kit is snap-connected to the transmission part, facilitating the separation of the kit from the transmission part when the outer shell is separated from the housing, enabling the main body mechanism to be connected to other output structures, such as a whisk. The rotation speed of the motor is adjusted by the control part to meet the rotation speed requirements of different output structures. A spiral groove is provided outside the sleeve, and the sleeve is arranged inside the tube, allowing the length of the sleeve to be designed as needed, expanding the lifting distance range of the shaft body, and realizing the lifting of the shaft body while it rotates, expanding the range that the blade can cut. The upper frame and the lower frame are also tubular, which can maintain the smoothness of the outer surfaces of the upper frame and the lower frame, and enable the upper frame and the lower frame not to overlap, reducing the thickness.

Description

Technical Field

[0001] The present invention relates to the field of food processors, and more particularly to a hand-held blender. Background Art

[0002] In food processors, including hand-held blenders, which are mainly used to cut or stir food, etc., a main machine mechanism, a transmission mechanism, a blade and a shaft body are provided therein. The top of the shaft body is detachably connected to the blade. The main machine mechanism drives the shaft body to rotate through the transmission mechanism, and the food is processed by the blade.

[0003] The position of the blade of the existing hand-held blender is fixed when stirring food, and the range of cutting or stirring food during food processing is small, and the processing efficiency is not high. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a hand-held blender, so that while the blade rotates, it realizes reciprocating cutting of food by rising and falling, increases the cutting area, and improves the cutting efficiency.

[0005] To achieve the above object, the present invention provides the following technical solution: A hand-held blender, including a main machine mechanism, a housing and a tube connected to the housing. A transmission member, a shaft body and a transmission mechanism are provided in the housing. The transmission member and the shaft body are slidably connected. A lifting mechanism is provided in the tube. The lifting mechanism includes a limiting member and a sleeve rotatably connected to the shaft body. A spiral groove connected end to end is formed on the outer side surface of the sleeve. The limiting member is rotatably connected in the tube and slides in the spiral groove. The transmission mechanism includes a transmission part and a lower gear ring. The shaft body passes through the lower gear ring, and the lower gear ring is fixedly connected to the sleeve. During operation, the main machine mechanism drives the shaft body and the lower gear ring to rotate through the transmission member, so that the shaft body reciprocates up and down while rotating, and there is a speed difference between the shaft body and the lower gear ring.

[0006] The main machine mechanism includes a housing, an electric motor and a control part. The control part is used to control the rotation speed of the electric motor. The housing is detachably connected to the housing. A kit is fixedly connected to the output shaft of the electric motor, and the kit is clamped with the transmission member.

[0007] As a further improvement of the present invention, a through hole is formed in the transmission member, and a plurality of sliding grooves are formed on the inner side surface of the through hole. A plurality of protrusions are integrally formed on the outer side surface of the shaft body, and the protrusions slide in the corresponding sliding grooves.

[0008] As a further improvement of the present invention, the transmission part includes an upper gear ring, a frame body and a rotating member. The upper gear ring is fixedly connected to the housing. The rotating member is rotatably connected to the frame body. The rotating member includes an upper gear ring and a lower gear ring. The upper gear ring meshes with the upper gear ring and the transmission member. The lower gear ring meshes with the lower gear ring. A circular ring is arranged between the upper gear ring and the lower gear ring, and part of the circular ring is located in the gap formed by the upper gear ring and the lower gear ring.

[0009] As a further improvement of the present invention, the frame body includes an upper disk and a lower disk, which are fixedly connected between the upper disk and the lower disk. The rotating member is rotatably connected between the upper disk and the lower disk.

[0010] As a further improvement of the present invention, there is a difference in the number of teeth between the upper gear ring and the lower gear ring.

[0011] As a further improvement of the present invention, an upper frame is fixedly connected inside the tube body. The bottom of the upper frame is fixedly connected with a lower frame. A first semi-circular hole is opened at the bottom of the upper frame, and a second semi-circular hole is opened at the top of the lower frame. The first semi-circular hole and the second semi-circular hole form a connection hole, and the limiting member is rotatably connected in the connection hole.

[0012] As a further improvement of the present invention, the spiral groove includes a first spiral section and a second spiral section. The first spiral section and the second spiral section intersect with each other, and the top of the first spiral section is connected to the top of the second spiral section, and the tail of the first spiral section is connected to the tail of the second spiral section.

[0013] As a further improvement of the present invention, an upper positioning member and a lower positioning member are fixedly connected to the shaft body. The sleeve is movably connected between the upper positioning member and the lower positioning member. The sleeve includes a connecting section and a lifting section. The cross-section of the connecting section is polygonal. A polygonal hole is opened on the lower gear ring, and the connecting section is fitted with the polygonal hole. The cross-section of the lifting section is circular, and the spiral groove is opened on the outer side surface of the lifting section.

[0014] As a further improvement of the present invention, the control part includes a PCB board and a potentiometer. The potentiometer is electrically connected to the PCB board, and the PCB board is electrically connected to the motor.

[0015] As a further improvement of the present invention, a groove is opened in the kit, and a plurality of positioning grooves are opened in the groove. The plurality of positioning grooves are evenly distributed along the circumference of the shaft body. A plurality of positioning strips are integrally formed on the outer side surface of the transmission member. The plurality of positioning strips are evenly distributed along the circumference of the shaft body, and the positioning strips are inserted into the corresponding positioning grooves.

[0016] Advantages of the present invention: In the present invention, the kit is snap-connected to the transmission member, which facilitates the separation of the kit from the transmission member when the outer shell is separated from the housing, enabling the main body mechanism to be connected to other output structures, such as an egg beater. The rotation speed of the motor can be adjusted by the control unit to meet the rotation speed requirements of different output structures. Moreover, after the main body mechanism and the housing are disassembled and assembled, it is convenient to clean the blade, housing, etc., preventing water from entering the main body mechanism and damaging the motor. The spiral groove is provided on the outer sleeve, and the sleeve is arranged in the tube body, allowing the length of the sleeve to be designed as needed, expanding the lifting distance range of the shaft body. Meanwhile, the shaft body can be lifted while rotating, expanding the cutting range of the blade. Additionally, the installation is achieved by the interference fit between the insertion rod and the insertion hole, reducing the use of standard parts such as bolts. The upper frame and the lower frame are also tubular, which can maintain the smoothness of the outer surfaces of the upper frame and the lower frame, and enable the upper frame and the lower frame not to overlap, reducing the thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 is a structural schematic diagram at the control unit of the present invention;

[0019] Figure 3 is a structural schematic diagram at the detachable connection between the outer shell and the housing of the present invention;

[0020] Figure 4 is a structural schematic diagram at the detachable connection between the housing and the outer shell of the present invention;

[0021] Figure 5 is a structural schematic diagram of the kit of the present invention;

[0022] Figure 6 is a three-dimensional structural schematic diagram at the housing of the present invention

[0023] Figure 7 is the present invention Figure 6 sectional view;

[0024] Figure 8 is the present invention Figure 7 magnified schematic view at A in;

[0025] Figure 9 is a structural schematic diagram at the lower gear ring of the present invention;

[0026] Figure 10 is a structural schematic diagram of the transmission member of the present invention;

[0027] Figure 11 is a structural schematic diagram at the rotating member of the present invention;

[0028] Figure 12It is a schematic structural diagram of the spiral groove in the present invention;

[0029] Figure 13 It is a schematic structural diagram of the casing in the present invention;

[0030] Figure 14 It is a schematic structural diagram of the frame in the present invention.

[0031] Reference numerals: 11, outer shell; 12, motor; 13, control unit; 131, PCB board; 132, potentiometer; 14, kit; 141, groove; 142, positioning groove; 1, housing; 2, pipe body; 21, upper frame; 211, first semi-circular hole; 22, lower frame; 221, second semi-circular hole; 23, upper positioning member; 24, lower positioning member; 3, transmission member; 31, through hole; 32, sliding groove; 33, positioning strip; 4, shaft body; 41, rib; 51, transmission part; 511, upper gear ring; 512, frame; 513, rotating member; 52, lower gear ring; 53, circular ring; 61, limiting member; 62, casing; 621, connecting section; 622, lifting section; 7, spiral groove; 71, first spiral section; 72, second spiral section. Detailed implementation manners

[0032] The present invention will be further described in detail below in conjunction with the drawings and embodiments. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component, respectively.

[0033] Referring to Figures 1 to 14 As shown, a hand-held mixer in this embodiment includes a main machine mechanism, a housing 1, and a pipe body 2 connected to the housing 1. The housing 1 and the pipe body 2 are snap-connected. A transmission member 3, a shaft body 4, and a transmission mechanism are arranged in the housing 1. The transmission member 3 and the shaft body 4 are slidably connected. A lifting mechanism is arranged in the pipe body 2. The lifting mechanism includes a limiting member 61 and a casing 62 rotatably connected to the shaft body 4. A spiral groove 7 that is connected end to end is formed on the outer side surface of the casing 62. The limiting member 61 is rotatably connected in the pipe body 2 and slides in the spiral groove 7;

[0034] Referring to Figure 13 As shown, the limiting member 61 includes a cylindrical head and an arc-shaped body fixedly connected to the cylindrical head. The cylindrical head is rotatably connected to the casing 62, and the arc-shaped body slides in the spiral groove 7, which can enable the arc-shaped body to change its sliding direction along the direction of the spiral groove 7 in the spiral groove 7;

[0035] The spiral groove 7 is arranged outside the sleeve 62 , and the sleeve 62 is arranged inside the tube body 2 , so that the length of the sleeve 62 can be designed as needed, thereby expanding the lifting distance range of the shaft body 4 .

[0036] The transmission mechanism includes a transmission part 51 and a lower gear ring 52. The shaft body 4 passes through the lower gear ring 52. The lower gear ring 52 is fixedly connected to the sleeve 62, so that when the lower gear ring 52 rotates, the sleeve 62 can be driven to rotate.

[0037] During operation, the main mechanism drives the shaft body 4 and the lower gear ring 52 to rotate through the transmission member 3, so that the shaft body 4 rotates and reciprocates while lifting and lowering. There is a speed difference between the shaft body 4 and the lower gear ring 52, so that there is a speed difference between the sleeve 62 and the shaft body 4. The speed difference causes the position of the limiter 61 in the spiral groove 7 to change continuously, thereby driving the shaft body 4 to lift and reciprocate.

[0038] The host mechanism includes a housing 11, a motor 12 and a control unit 13. The control unit 13 is used to control the rotation speed of the motor 12. The housing 11 is detachably connected to the housing 1.

[0039] The outer side of the housing 11 is provided with a card slot, and there are two card slots, which are arranged opposite to each other. An L-shaped piece is fixedly connected to the outer side of the housing 11, and the card slot is formed on the L-shaped piece. A card piece is fixedly connected to the inner side of the housing 1. The card piece is arc-shaped, and an embedding groove is opened on the L-shaped piece. A protrusion is provided on one side of the embedding groove, so that one end of the card piece can be partially embedded in the embedding groove and pass over the protrusion, so that the card piece needs to be rotated by external force to be out of the embedding groove;

[0040] In addition, an elastic hole is provided below the L-shaped member, and an elastic member is fixedly connected to one side of the elastic hole. The elastic member includes a fixed end and a movable end, and is integrally formed with the housing 11 through the fixed end. A convex circle is provided on the outer side surface of the movable end. Below the clamp, a transverse plate is fixedly connected, and a concave circle is provided on the transverse plate. The convex circle can be embedded in the concave circle to form a fixation. When disengaging, an external force of rotation is also required, which cooperates with the L-shaped member and the convexity to form a detachable connection between the housing 11 and the shell 1.

[0041] A kit 14 is fixedly connected to the output shaft of the motor 12, and the kit 14 is snap-connected with the transmission member 3, so that when the outer shell 11 is separated from the shell 1, the kit 14 is separated from the transmission member 3, so that the host mechanism can be connected to other output structures, such as an egg beater, etc., and the speed of the motor 12 can be adjusted through the control unit 13 to meet the speed requirements of different output structures; and after disassembly and assembly, it is convenient to clean the blade, shell 1, etc. to prevent water from entering the host mechanism and damaging the motor 12, etc.

[0042] Reference Figure 5As shown, a groove 141 is formed in the kit 14, and a plurality of positioning grooves 142 are formed in the groove 141. The plurality of positioning grooves 142 are evenly distributed along the circumferential direction of the shaft body 4. A plurality of positioning strips 33 are integrally formed on the outer side surface of the transmission member 3. The plurality of positioning strips 33 are evenly distributed along the circumferential direction of the shaft body 4. The positioning strips 33 are inserted into the corresponding positioning grooves 142 to form the connection between the transmission member 33 and the kit 14. The positioning strips are vertically arranged, and the plurality of positioning strips are evenly distributed along the circumferential direction of the shaft body 4. The connection method is convenient and facilitates disassembly and assembly. The kit 14 can be matched with a variety of output structures.

[0043] Referring to Figure 2 As shown, the control unit 13 includes a PCB board 131 and a potentiometer 132. The potentiometer 132 is electrically connected to the PCB board 131, and the PCB board 131 is electrically connected to the motor 12. A rotating member is provided at the top of the housing 11, and the rotating member is connected to the input end of the potentiometer 132. The user rotates the rotating member to change the resistance of the potentiometer 132, thereby adjusting the voltage input to the motor 12 to control the rotation speed of the motor 12. A power switch is also provided on the housing 11 to control the opening and closing of the hand-held mixer.

[0044] Referring to Figure 8 and Figure 13 As shown, a through hole 31 is formed in the transmission member 3. The through hole 31 penetrates the entire transmission member 3, so that the shaft body 4 can move along the depth direction of the entire through hole 31. The height of the transmission member 3 can be set according to different needs, so as to set through holes 31 with different depths, so as to expand the lifting distance of the shaft body 4. A plurality of sliding grooves 32 are formed on the inner side surface of the through hole 31, and a plurality of convex strips 41 are integrally formed on the outer side surface of the shaft body 4. The convex strips 41 slide in the corresponding sliding grooves 32. On the one hand, the shaft body 4 can be slid, that is, lifted and lowered. On the other hand, when the transmission member 3 rotates, the shaft body 4 can be driven to rotate.

[0045] Referring to Figure 8 As shown, the transmission part 51 includes an upper gear ring 511, a frame body 512 and a rotating part 513. The upper gear ring 511 is fixedly connected to the housing 1. The rotating part 513 is rotatably connected to the frame body 512. The rotating part 513 includes an upper tooth ring and a lower tooth ring. The upper tooth ring meshes with the upper gear ring 511 and the transmission member 3. A tooth surface is provided on the outer side surface of the transmission member 3. The lower tooth ring meshes with the lower gear ring 52. A circular ring 53 is provided between the upper tooth ring and the lower tooth ring. Part of the circular ring 53 is located in the gap formed by the upper gear ring 511 and the lower gear ring 52;

[0046] Due to the fixed connection of the upper gear ring 511, when the rotating part 513 is driven by the transmission member 3 to rotate, it rotates circumferentially around the shaft body 4, that is, rotation and revolution are carried out simultaneously. Due to the revolution and speed difference of the rotating part 513, the lower gear ring 52 is driven to rotate.

[0047] The inner sides of both the upper gear ring 511 and the lower gear ring 52 are provided with tooth surfaces. The number of teeth on the tooth surfaces is different, resulting in a tooth number difference. There is a tooth number difference between the upper gear ring and the lower gear ring, which overall makes the rotational speed of the lower gear ring 52 different from the rotational speed of the shaft body 4, that is, the rotational speed of the lower gear ring 52 is different from the rotational speed of the transmission member 3.

[0048] A gap is formed between the upper gear ring 511 and the lower gear ring 52, that is, there is an interval space between the upper gear ring 511 and the lower gear ring 52. During the rotation of the rotating member 513, part of the ring 53 is always located in this gap, limiting the space for the ring 53 to move up and down, and thus limiting the space for the rotating member 513 to move up and down. Therefore, the installation of the frame body 512 can be achieved without connecting the frame body 512 through a bearing, and the frame body 512 can be rotated along with the rotation of the rotating member 513.

[0049] Refer to Figure 11 、 Figure 12 and Figure 14 As shown in the figure, three rotating members 513 are provided and are evenly distributed circumferentially along the shaft body 4, making the revolution and rotation of the rotating member 513 more stable.

[0050] Refer to Figure 9 As shown in the figure, the frame body 512 includes an upper disk and a lower disk. The upper disk and the lower disk are fixedly connected. The rotating member 513 is rotatably connected between the upper disk and the lower disk. The upper disk and the lower disk are fixed by standard parts such as bolts to limit the distance between the upper disk and the lower disk.

[0051] Refer to Figure 12 As shown in the figure, an upper frame 21 is fixedly connected inside the pipe body 2. The bottom of the upper frame 21 is fixedly connected with a lower frame 22. The bottom of the upper frame 21 is provided with a jack, and the top of the lower frame 22 is fixedly connected with a plug. The installation is carried out by the interference fit of the plug and the jack, reducing the use of standard parts such as bolts. The upper frame 21 and the lower frame 22 are also tubular, which can maintain the smoothness of the outer surfaces of the upper frame 21 and the lower frame 22, and make it unnecessary for the upper frame 21 and the lower frame 22 to overlap, reducing the thickness.

[0052] A first semi-circular hole 211 is opened at the bottom of the upper frame 21, and a second semi-circular hole 221 is opened at the top of the lower frame 22. The first semi-circular hole 211 and the second semi-circular hole 221 form a connection hole. The limiting member 61 is rotatably connected in the connection hole. The bearing can be fixed through the first semi-circular hole 211 and the second semi-circular hole 221, and the limiting member 61 is connected through the bearing.

[0053] Refer to Figure 13As shown, the spiral groove 7 includes a first spiral section 71 and a second spiral section 72. The first spiral section 71 and the second spiral section 72 intersect with each other, and the top of the first spiral section 71 is connected to the top of the second spiral section 72, and the tail of the first spiral section 71 is connected to the tail of the second spiral section 72. When the limiting member 61 moves starting from the tail of the first spiral section 71, it moves along the set direction of the first spiral section 71 to its top, then moves from the top of the first spiral section 71 to the top of the second spiral section 72, and moves along the set direction of the second spiral section 72 to its tail, and then enters the tail of the first spiral section 71. By cycling in this way, the reciprocating lifting of the sleeve 62 is realized, and thus the reciprocating lifting of the shaft body 4 is realized.

[0054] Referring to Figure 8 As shown, an upper positioning member 23 and a lower positioning member 24 are fixedly connected to the shaft body 4, and the sleeve 62 is movably connected between the upper positioning member 23 and the lower positioning member 24, which simplifies the installation method of the sleeve 62, reduces the use of standard parts such as bearings, can make the gap between the shaft body 4 and the sleeve 62 smaller, thereby reducing the outer diameter of the pipe body 2 and making the overall volume of the hand-held food processor smaller.

[0055] Referring to Figure 13 As shown, the sleeve 62 includes a connecting section 621 and a lifting section 622. The cross-section of the connecting section 621 is polygonal, and a polygonal hole is formed in the lower gear ring 52. The connecting section 621 is fitted with the polygonal hole. By setting the cross-section of the connecting section 621 to be polygonal, the rotation of the lower gear disc drives the sleeve 62 to rotate. And due to the existence of the upper positioning member 23 and the lower positioning member 24, when the sleeve 62 moves between the upper positioning member 23 and the lower positioning member 24, it is always embedded in the polygonal hole, without the need to install components such as bearings, which simplifies the installation method. So that the sleeve 62 can be installed between the upper positioning member 23 and the lower positioning member 24, there can be an installation error, and the outer diameter size of the sleeve 62 caused by the need for bearings is reduced, and the outer diameter of the overall pipe body 2 is reduced.

[0056] The cross-section of the lifting section 622 is circular, and the spiral groove 7 is provided on the outer side surface of the lifting section 622, which is convenient for the setting of the spiral groove 7.

[0057] Working principle: During operation, the motor 12 is connected to the transmission member 3 through the kit 14 on its shaft, so as to drive the transmission member 3 to rotate. The transmission member 3 drives the rotating member 513 to rotate by meshing with the upper toothed ring, so that the rotating member 513 rotates on its own axis. Since the upper toothed ring meshes with the upper toothed gear 511, and the upper toothed gear 511 is fixed to the housing 1, therefore, the rotating member 513 revolves around the shaft body 4. And because there is a difference in the number of teeth between the upper toothed ring and the lower toothed ring, it will drive the lower toothed gear 52 to rotate, thereby driving the sleeve 62 to rotate, so that the limiting member 61 slides in the spiral groove 7, driving the shaft body 4 to reciprocate up and down. The bottom of the shaft body 4 extends out of the pipe body 2 and is fixedly connected with a blade, and the food is cut by the blade.

[0058] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A hand-held blender, characterized in that: it includes a main body mechanism, a housing (1) and a pipe body (2) connected to the housing (1). A transmission member (3), a shaft body (4) and a transmission mechanism are arranged in the housing (1). The transmission member (3) and the shaft body (4) are slidably connected. A lifting mechanism is arranged in the pipe body (2). The lifting mechanism includes a limiting member (61) and a sleeve (62) rotatably connected to the shaft body (4). A spiral groove (7) connected end to end is formed on the outer side surface of the sleeve (62). The limiting member (61) is rotatably connected in the pipe body (2) and slides in the spiral groove (7). The transmission mechanism includes a transmission part (51) and a lower gear ring (52). The shaft body (4) passes through the lower gear ring (52), and the lower gear ring (52) is fixedly connected to the sleeve (62). During operation, the main body mechanism drives the shaft body (4) and the lower gear ring (52) to rotate through the transmission member (3), so that the shaft body (4) makes a reciprocating lifting motion while rotating, and there is a rotational speed difference between the shaft body (4) and the lower gear ring (52); The main body mechanism includes a housing (11), a motor (12) and a control part (13). The control part (13) is used to control the rotational speed of the motor (12). The housing (11) is detachably connected to the housing (1). A kit (14) is fixedly connected to the output shaft of the motor (12), and the kit (14) is clamped with the transmission member (3); The transmission part (51) includes an upper gear ring (511), a frame body (512) and a rotating member (513). The upper gear ring (511) is fixedly connected to the housing (1). The rotating member (513) is rotatably connected to the frame body (512). The rotating member (513) includes an upper tooth ring and a lower tooth ring. The upper tooth ring meshes with the upper gear ring (511) and the transmission member (3), and the lower tooth ring meshes with the lower gear ring (52). A circular ring (53) is arranged between the upper tooth ring and the lower tooth ring, and part of the circular ring (53) is located in the gap formed by the upper gear ring (511) and the lower gear ring (52).

2. A hand-held blender according to claim 1, characterized in that: a through hole (31) is formed in the transmission member (3), and a plurality of sliding grooves (32) are formed on the inner side surface of the through hole (31). A plurality of protruding strips (41) are integrally formed on the outer side surface of the shaft body (4), and the protruding strips (41) slide in the corresponding sliding grooves (32).

3. A hand-held blender according to claim 1, characterized in that: the frame body (512) includes an upper disc and a lower disc, and the upper disc and the lower disc are fixedly connected between them. The rotating member (513) is rotatably connected between the upper disc and the lower disc.

4. A hand-held blender according to claim 1, characterized in that: there is a difference in the number of teeth between the upper tooth ring and the lower tooth ring.

5. A hand-held blender according to claim 1, characterized in that: A mounting frame (21) is fixedly connected inside the pipe body (2). A lower frame (22) is fixedly connected to the bottom of the mounting frame (21). A first semi-circular hole (211) is formed in the bottom of the mounting frame (21). A second semi-circular hole (221) is formed in the top of the lower frame (22). The first semi-circular hole (211) and the second semi-circular hole (221) form a connection hole. The limiting member (61) is rotatably connected inside the connection hole.

6. A hand-held mixer according to claim 1, wherein: The spiral groove (7) includes a first spiral section (71) and a second spiral section (72). The first spiral section (71) and the second spiral section (72) intersect with each other. The top of the first spiral section (71) is connected to the top of the second spiral section (72). The tail of the first spiral section (71) is connected to the tail of the second spiral section (72).

7. A hand-held mixer according to claim 1, wherein: An upper positioning member (23) and a lower positioning member (24) are fixedly connected to the shaft body (4). The sleeve (62) is movably connected between the upper positioning member (23) and the lower positioning member (24). The sleeve (62) includes a connecting section (621) and a lifting section (622). The cross-section of the connecting section (621) is polygonal. A polygonal hole is formed in the lower gear ring (52). The connecting section (621) is fitted into the polygonal hole. The cross-section of the lifting section (622) is circular. The spiral groove (7) is formed in the outer side surface of the lifting section (622).

8. A hand-held mixer according to claim 1, wherein: The control unit (13) includes a PCB board (131) and a potentiometer (132). The potentiometer (132) is electrically connected to the PCB board (131). The PCB board (131) is electrically connected to the motor (12).

9. A hand-held mixer according to claim 1, wherein: A groove (141) is formed in the kit (14). A plurality of positioning grooves (142) are formed in the groove (141). The plurality of positioning grooves (142) are evenly distributed along the circumferential direction of the shaft body (4). A plurality of positioning strips (33) are integrally formed on the outer side surface of the transmission member (3). The plurality of positioning strips (33) are evenly distributed along the circumferential direction of the shaft body (4). The positioning strips (33) are inserted into the corresponding positioning grooves (142).

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