Lower water adding column, water injector, water adding device and household appliance

Abstract

The utility model relates to the technical field of household appliances, and discloses a lower water adding column, a water injector, a water adding device and a household appliance. The spiral arm is arranged at the water outlet end of the pipe fitting main body; the rotating arm is of a groove-shaped structure with an opening in the top face, a water supply opening is formed in the bottom side of the rotating arm, and a water adding channel is formed between the water inlet hole and the water supply opening. A matching structure is formed on the peripheral side, close to the water inlet end, of the pipe fitting body and suitable for being connected with a driving mechanism through a transmission assembly, and the driving mechanism can drive the lower water adding column to rotate so that the water supply opening can move to the position above the water consuming device. The lower water adding column comprises a pipe fitting body and a rotating arm, a water adding channel is formed between a water inlet hole in the pipe fitting body and a water supply opening in the rotating arm, the water adding structure is simple, assembling is convenient, the assembling efficiency is improved, and maintaining is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of household appliances, and particularly relates to a lower water column, a water injector, a water adding device and a household appliance. BACKGROUND

[0002] Some kitchen appliances and household appliances such as electric tea stoves adopt rotatable water adding devices to supplement water. For example, an electric kettle with automatic water injection generally rotates a water adding arm driven by a motor to switch the water adding arm between an initial storage position and a water injection position above a water injection opening of the kettle. The water adding arm structure on the market is complex and inconvenient to assemble. SUMMARY

[0003] Therefore, the utility model provides a lower water column, a water injector, a water adding device and a household appliance to solve the problem of complex water adding arm structure and inconvenient assembly.

[0004] In a first aspect, the utility model provides a lower water column, comprising:

[0005] A pipe body, a water inlet hole is arranged at a water inlet end of the pipe body;

[0006] A rotating arm is arranged at a water outlet end of the pipe body; the rotating arm has a groove-shaped structure with an open top surface, a water supply opening is arranged at a bottom side of the rotating arm, and a water adding channel is formed between the water inlet hole and the water supply opening;

[0007] A cooperation structure is formed at a circumferential side of the pipe body close to the water inlet end, the cooperation structure is suitable for being connected to a driving mechanism through a transmission assembly, and the driving mechanism can drive the lower water column to rotate so that the water supply opening moves above a water using device.

[0008] Advantages: the lower water column comprises the pipe body and the rotating arm, the water adding channel is formed between the water inlet hole on the pipe body and the water supply opening on the rotating arm, the water adding structure is simple, convenient to assemble, improves assembly efficiency, and is also convenient to maintain.

[0009] In an optional embodiment, the lower water column further comprises:

[0010] A first connecting pipe is arranged in a groove cavity of the rotating arm;

[0011] A first connector is arranged in the groove cavity of the rotating arm; a first end of the first connector is in communication with one end of the first connecting pipe close to the water supply opening, and a second end of the first connector is in communication with the water supply opening;

[0012] Second joint, part of the second joint is arranged in the slot cavity of the rotary arm; the first end of the second joint is in communication with the end of the first connecting pipe close to the pipe body, and the second end of the second joint is connected with the pipe body and in communication with the water inlet hole.

[0013] Beneficial effect: the first connecting pipe is in communication with the water supply port and the water inlet hole through the first joint and the second joint respectively, which can ensure water quality safety, facilitate the use of different materials for the water flow channel and the rotary arm, and ensure sealing performance.

[0014] In an alternative embodiment, the pipe body is provided with an upper shaft shoulder and a lower shaft shoulder on the lateral side, which are adapted to be connected with the environment to realize axial positioning of the lower water column.

[0015] Beneficial effect: the upper shaft shoulder and the lower shaft shoulder are arranged on the pipe body, which facilitates axial positioning of the pipe body and improves installation reliability.

[0016] In an alternative embodiment, the bottom end of the pipe body is provided with a connecting column, and the water inlet hole is located at the end of the connecting column; the matching structure is arranged between the connecting column and the lower shaft shoulder.

[0017] Beneficial effect: the connecting column is arranged at the bottom end of the pipe body, which facilitates connection with the water delivery pipe and improves assembly convenience.

[0018] In an alternative embodiment, the lower water column further comprises:

[0019] Positioning rib or positioning groove, arranged at the matching structure, adapted to be matched and connected with the positioning groove or positioning rib on the transmission assembly.

[0020] Beneficial effect: the positioning rib is arranged on one of the lower water column and the transmission assembly, and the positioning groove is arranged on the other one, which can prevent mistakes during installation and improve installation efficiency.

[0021] In an alternative embodiment, the pipe body and the rotary arm are integrally formed.

[0022] Beneficial effect: the pipe body and the rotary arm are integrally formed, which ensures structural rigidity and further simplifies the assembly structure and improves assembly convenience.

[0023] In a second aspect, the utility model also provides a water injector, which comprises:

[0024] The lower water column of any one of the above;

[0025] Upper cover, buckled at the open end of the rotary arm of the lower water column.

[0026] Beneficial effect: set the upper cover, avoid the slot cavity of the swing arm to fall dust, and the pipeline is hidden in the interior, more beautiful. Since the water injector comprises the lower water injection of the utility model, it has the same technical effects as the lower water injection, which will not be described here.

[0027] In an alternative embodiment, the swing arm is provided with a buckle position, the upper cover is provided with a buckle, and the upper cover is detachably connected to the swing arm through the clamping of the buckle and the buckle position.

[0028] Beneficial effect: the buckle and the buckle position are clamped together, so that the upper cover is detachably mounted on the swing arm of the lower water injection column, facilitating disassembly and assembly.

[0029] In a third aspect, the utility model also provides a water adding device, which comprises:

[0030] The water supply assembly is connected to a water source.

[0031] The water injector of any one of the above-mentioned embodiments is connected in communication with the water supply assembly.

[0032] The transmission assembly comprises:

[0033] The driving mechanism is drivingly connected to the water injector through the transmission assembly.

[0034] Beneficial effect: since the water adding device comprises the water injector of the utility model, it has the same technical effects as the lower water injection, which will not be described here.

[0035] In an alternative embodiment, the transmission assembly comprises:

[0036] The first connecting shaft is adapted to be drivingly connected to the to-be-driven component.

[0037] The third connecting shaft is adapted to be drivingly connected to the power output end of the driving mechanism.

[0038] The second connecting shaft is drivingly arranged between the first connecting shaft and the third connecting shaft. A pre-tightening mechanism is arranged between the first connecting shaft and the second connecting shaft, and the second connecting shaft can be tightly pressed against the third connecting shaft.

[0039] The anti-over-torque structure is arranged on the transmission cooperation surface between the second connecting shaft and the third connecting shaft. When the torque between the second connecting shaft and the third connecting shaft is greater than the transmission torque, the second connecting shaft can be separated from the third connecting shaft along the anti-over-torque structure.

[0040] Beneficial effects: The transmission assembly includes a first connecting shaft, a second connecting shaft and a third connecting shaft, the third connecting shaft transmits kinetic energy of the driving mechanism to the second connecting shaft, and then transmits the kinetic energy to the to-be-driven component through the first connecting shaft in transmission connection with the second connecting shaft, so that the to-be-driven component can be conveniently driven to rotate, and since the anti-over-torque structure is arranged on the transmission matching surface between the second connecting shaft and the third connecting shaft, when the torque between the second connecting shaft and the third connecting shaft is greater than the transmission torque, the second connecting shaft can be separated from the third connecting shaft along the anti-over-torque structure, the torque transmission link is disconnected, damage to the driving mechanism in transmission connection with the third connecting shaft is avoided, and over-torque protection is realized. Moreover, the second connecting shaft is arranged between the third connecting shaft as a power input shaft and the first connecting shaft as a power output shaft, so that when the transmission assembly is separated in the axial direction due to over-torque, the to-be-driven component is not affected, and axial movement of the to-be-driven component is prevented, thereby avoiding a bad experience for the user.

[0041] In an alternative embodiment, the anti-over-torque structure includes:

[0042] a convex rib arranged on one of the end face of the second connecting shaft and the end face of the third connecting shaft;

[0043] a convex block arranged on the other one of the end face of the second connecting shaft and the end face of the third connecting shaft; the convex block is in transmission connection with the convex rib.

[0044] Beneficial effects: The convex rib and the convex block are in transmission connection, and serve as both a transmission structure and an anti-over-torque structure, so that the structure is more compact.

[0045] In an alternative embodiment, the convex rib is provided with a guide surface, the convex block is provided with a guide inclined surface, and the convex rib and the convex block can be guided to separate along the guide surface and the guide inclined surface.

[0046] Beneficial effects: The guide surface is arranged on the convex rib and cooperates with the guide inclined surface on the convex block, so that when the torque is greater than the transmission torque, the convex rib and the convex block can be guided to separate along the guide surface and the guide inclined surface, the second connecting shaft and the third connecting shaft are separated, the transmission process is disconnected, and damage to the driving mechanism is avoided.

[0047] In an alternative embodiment, the first connecting shaft is a hollow cylinder, an annular stepped surface is formed in the hollow cavity of the first connecting shaft to separate the hollow cavity into a first connecting cavity and a second connecting cavity; and the first connecting shaft further includes:

[0048] a first transmission matching surface adapted to be in matching connection with the to-be-driven component, the first transmission matching surface being arranged in the first connecting cavity;

[0049] The second transmission matching surface is suitable for matching connection with the second connecting shaft; the second transmission matching surface is arranged on the second connecting cavity; and one end of the second connecting shaft passes through the second connecting cavity and is overlapped on the stepped surface.

[0050] Beneficial effect: The annular stepped surface formed in the hollow cavity of the first connecting shaft can be used as a limiting structure of the second connecting shaft to limit the axial movement distance of the second connecting shaft, so as to avoid excessive axial movement of the second connecting shaft during disengagement from the third connecting shaft, and improve the reliability of the transmission assembly.

[0051] In an alternative embodiment, the first transmission matching surface and the second transmission matching surface both comprise polygonal matching surfaces.

[0052] Beneficial effect: The transmission matching surface comprises a polygonal matching surface, and the transmission is achieved by the meshing of the polygonal surface, which is simple in structure and high in transmission reliability, and is suitable for torque transmission.

[0053] In an alternative embodiment, the second connecting shaft comprises:

[0054] The transmission rod is provided with a third transmission matching surface matched with the first connecting shaft near the top circumferential side of the first connecting shaft.

[0055] The skirt is arranged on the transmission rod near the bottom end of the third connecting shaft; the bottom end of the skirt is provided with a fourth transmission matching surface matched with the third connecting shaft, and the pre-tightening mechanism abuts against the annular top surface of the skirt.

[0056] Beneficial effect: The skirt is arranged at the bottom end of the transmission rod to increase the area of the transmission matching surface of the second connecting shaft and the third connecting shaft, thereby facilitating the arrangement of an anti-over-torque structure, and facilitating the arrangement of a pre-tightening mechanism to apply a pre-tightening force on the second connecting shaft to abut the second connecting shaft against the third connecting shaft, thereby achieving reliable transmission.

[0057] In an alternative embodiment, the top end of the transmission rod is provided with a mounting portion, the mounting portion is provided with a pre-assembled part, and the mounting portion can pass through the annular stepped surface and be limited in the first connecting cavity by the pre-assembled part.

[0058] Beneficial effect: The pre-assembled part is arranged, and during assembly of the transmission assembly, the second connecting shaft can be arranged in the hollow cavity of the first connecting shaft for preliminary positioning and fixation to prevent the second connecting shaft from falling and improve installation convenience.

[0059] In an alternative embodiment, the third transmission shaft comprises:

[0060] The transmission cap is provided with a fifth transmission matching surface matched with the fourth transmission matching surface; the anti-over-torque structure is arranged on the fourth transmission matching surface and the fifth transmission matching surface;

[0061] An input shaft is arranged on the side of the transmission cap away from the fifth transmission matching surface; the power output end of the driving mechanism is matched with the shaft hole on the input shaft.

[0062] Beneficial effects: the power output end of the driving mechanism is directly arranged in the shaft hole of the third transmission shaft, the connection is reliable, and the transmission is stable.

[0063] In a fourth aspect, the utility model also provides a household appliance, including any one of the lower water adding column or any one of the water injector or any one of the water adding device.

[0064] Beneficial effects: since the household appliance includes the lower water adding column, the same technical effects as the lower water adding column are achieved, which will not be repeated here.

[0065] In an optional implementation, the household appliance further includes:

[0066] A base;

[0067] A positioning plate, the lower water adding column is fixed to the base through the positioning plate.

[0068] Beneficial effects: the lower water adding column is fixed to the base through the positioning plate, and the installation reliability is improved.

[0069] In an optional implementation, the household appliance is an electric kettle.

[0070] Beneficial effects: the lower water adding column of the electric kettle includes a pipe body and a rotary arm, a water inlet hole on the pipe body and a water supply opening on the rotary arm form a water adding channel, the water adding structure is simple, convenient to assemble, improves the assembly efficiency, and is also convenient to maintain. BRIEF DESCRIPTION OF DRAWINGS

[0071] In order to more clearly illustrate the technical solutions in the specific embodiments or related technologies of the utility model, the drawings needed in the specific embodiments or related technology description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0072] Figure 1 It is a three-dimensional explosion structure diagram of an electric kettle of the utility model embodiment, and the kettle body is not shown in the figure;

[0073] Figure 2 It is an exploded structural view of the water injector of the utility model embodiment;

[0074] Figure 3 It is a three-dimensional structural view of the water column of the utility model embodiment;

[0075] Figure 4 It is a three-dimensional structural view of the upper cover of the utility model embodiment;

[0076] Figure 5 It is a three-dimensional exploded structural view of the transmission assembly of the utility model embodiment;

[0077] Figure 6 It is a three-dimensional structural view of the first connecting shaft of the utility model embodiment;

[0078] Figure 7 It is a three-dimensional structural view of the second connecting shaft of the utility model embodiment;

[0079] Figure 8 It is a three-dimensional structural view of the third connecting shaft of the utility model embodiment;

[0080] Figure 9 It is an exploded view of the connection structure of the transmission assembly, the water injection and the motor of the utility model embodiment;

[0081] Figure 10 It is a first perspective three-dimensional structural view of the electric kettle of the utility model embodiment;

[0082] Figure 11 It is a second perspective three-dimensional structural view of the electric kettle of the utility model embodiment;

[0083] Figure 12 It is a three-dimensional structural view of the electric kettle of the utility model embodiment after removing the kettle body;

[0084] Figure 13 It is a three-dimensional structural view of the kettle seat of the utility model embodiment;

[0085] Figure 14 It is a three-dimensional structural view of the fixing seat of the kettle seat of the utility model embodiment;

[0086] Figure 15 It is a three-dimensional structural view of the supporting ring of the kettle seat of the utility model embodiment;

[0087] Figure 16 It is a sectional view of the electric kettle of the utility model embodiment.

[0088] Explanation of reference signs:

[0089] 1, kettle seat;

[0090] 11. The fixed seat;

[0091] 111. The let-out notch;

[0092] 112. The sink groove;

[0093] 114. The installation support rib;

[0094] 115. The first installation part;

[0095] 1151. The positioning hole;

[0096] 12. The support ring;

[0097] 121. The decorative eave;

[0098] 1211. The through hole; 1212. The let-out decorative part;

[0099] 122. The ring body;

[0100] 123. The second installation part;

[0101] 124. The installation column;

[0102] 2. The water injector;

[0103] 21. The transmission assembly;

[0104] 211. The first connecting shaft;

[0105] 2111. The annular step; 2112. The first transmission matching surface; 21121. The positioning groove; 2113. The second transmission matching surface; 2114. The limiting rib; 2115. The let-out window; 2116. The trigger part; 2117. The upper abutting surface;

[0106] 212. The second connecting shaft;

[0107] 2121. The transmission rod; 21211. The third transmission matching surface; 2122. The skirt; 21221. The fourth transmission matching surface; 2123. The preinstalled part; 2124. The lower abutting surface;

[0108] 213. The third connecting shaft;

[0109] 2131. The transmission cap; 21311. The fifth transmission matching surface; 2132. The input shaft; 21321. The shaft hole;

[0110] 214. The pre-tightening mechanism;

[0111] 215. The anti-over-tightening structure;

[0112] 2151. The convex rib; 21511. The guide surface; 2152. The convex block; 21521. The guide inclined surface;

[0113] 22. The lower water column;

[0114] 221. The pipe body;

[0115] 2211. The water inlet hole; 2212. The matching structure; 22121. The positioning rib; 2213. The upper shaft shoulder; 2214. The lower shaft shoulder; 2215. The connecting column;

[0116] 222. The rotating arm;

[0117] 2221. The water supply port; 2222. The groove; 2223. The buckle;

[0118] 223. The first connecting pipe;

[0119] 224. The first joint;

[0120] 225. The second joint;

[0121] 23. The upper cover;

[0122] 231. The buckle;

[0123] 3. The positioning plate;

[0124] 31. The limiting rib;

[0125] 4. The second connecting pipe;

[0126] 5. The motor;

[0127] 6. The water pump;

[0128] 7. The photoelectric switch;

[0129] 8. The kettle body;

[0130] 81. The kettle spout;

[0131] 82. The water filling port;

[0132] 83. The kettle handle. DETAILED DESCRIPTION

[0133] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0134] In the description of the utility model, it needs to be explained that, unless otherwise specified, the meaning of "multiple" is two or more than two;The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0135] In the description of the utility model, it also needs to be explained that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0136] The embodiments of the utility model will be described below in combination with Figures 1 to 16 .

[0137] According to the embodiments of the utility model, on the one hand, a lower water adding column 22 is provided, which comprises:

[0138] As shown in Figures 1-3 , the lower water adding column 22 comprises:

[0139] The pipe body 221 is provided with a water inlet hole 2211 at the water inlet end;

[0140] The rotary arm 222 is arranged at the water outlet end of the pipe body 221. The rotary arm 222 has a groove-shaped structure with an open top surface. The bottom side of the rotary arm 222 is provided with a water supply port 2221. A water adding channel is formed between the water inlet hole 2211 and the water supply port 2221.

[0141] The peripheral side of the pipe body 221 near the water inlet end is formed with a matching structure 2212. The matching structure 2212 is adapted to be connected with the driving mechanism through the transmission assembly 21. The driving mechanism can drive the lower water adding column 22 to rotate, so that the water supply port 2221 moves to the upper side of the water using device.

[0142] The lower water adding column 22 comprises the pipe body 221 and the rotary arm 222. The water adding channel is formed between the water inlet hole 2211 on the pipe body 221 and the water supply port 2221 on the rotary arm 222. The water adding structure is simple, convenient to assemble, improves the assembly efficiency, and is also convenient to maintain.

[0143] In some embodiments, the lower water column 22 further comprises:

[0144] The first connecting pipe 223 is arranged in the slot cavity 2222 of the rotary arm 222.

[0145] The first joint 224 is arranged in the slot cavity 2222 of the rotary arm 222. The first end of the first joint 224 is in communication with one end of the first connecting pipe 223 close to the water supply port 2221, and the second end of the first joint 224 is in communication with the water supply port 2221.

[0146] The second joint 225 is partially arranged in the slot cavity 2222 of the rotary arm 222. The first end of the second joint 225 is in communication with one end of the first connecting pipe 223 close to the pipe body 221, and the second end of the second joint 225 is in communication with the pipe body 221 and the water inlet hole 2211.

[0147] The first connecting pipe 223 is in communication with the water supply port 2221 and the water inlet hole 2211 through the first joint 224 and the second joint 225, which can ensure water quality safety, facilitate the use of different materials for the water flow channel and the rotary arm 222, and ensure sealing performance.

[0148] In some embodiments, the pipe body 221 is provided with an upper shaft shoulder 2213 and a lower shaft shoulder 2214 on the side, which is suitable for connecting with the environment to realize axial limiting of the lower water column 22.

[0149] The upper shaft shoulder 2213 and the lower shaft shoulder 2214 are arranged on the pipe body 221, which facilitates axial limiting of the pipe body 221 and improves installation reliability.

[0150] In some embodiments, the bottom end of the pipe body 221 is provided with a connecting column 2215, and the water inlet hole 2211 is located at the end of the connecting column 2215. The cooperation structure 2212 is arranged between the connecting column 2215 and the lower shaft shoulder 2214.

[0151] The connecting column 2215 is arranged at the bottom end of the pipe body 221, which facilitates connection with the water conveying pipe and improves assembly convenience.

[0152] In some embodiments, the lower water column 22 further comprises:

[0153] The positioning rib 22121 or the positioning groove 21121 is arranged at the cooperation structure 2212 and is suitable for matching connection with the positioning groove 21121 or the positioning rib 22121 on the transmission assembly 21.

[0154] One of the lower water column 22 and the transmission assembly 21 is provided with the positioning rib 22121, and the other is provided with the positioning groove 21121, which can prevent mistakes during installation and improve installation efficiency.

[0155] According to the embodiment of the utility model, on the other hand, a water injector 2 is further provided, the water injector 2 includes lower water adding column 22 and upper cover 23, the structure of upper cover 23 is referred to Figure 4 The rotary arm 222 of lower water adding column 22 is provided with buckle position 2223, the upper cover 23 is provided with buckle 231, and the upper cover 23 is detachably connected with the rotary arm 222 through the clamping of buckle 231 and buckle position 2223. Buckle 231 is clamped with buckle position 2223, so that the upper cover 23 is detachably installed on the rotary arm 222 of lower water adding column 22, facilitating disassembly and assembly.

[0156] In some embodiments, the electric kettle further comprises a positioning plate 3, the positioning plate 3 is provided with a mounting hole of the water injector 2, and in addition, the positioning plate 3 is further provided with a fixing hole matched with the kettle seat 1. As an environmental component of the water injector 2, the limiting rib 31 is also arranged on the bottom side of the positioning plate 3, and the two limiting ribs 2114 on the first connecting shaft 211 can be stopped when rotating to the limiting rib 31. The bottom side of the positioning plate 3 is further provided with a sensor mounting structure, and the photoelectric switch 7 is mounted at the mounting structure.

[0157] The water injector 2 comprises an upper cover 23, a first connector 224, a first connecting pipe 223, a second connector 225, a connector sealing ring, a lower water adding column 22 sealing ring and a lower water adding column 22. One end of the first connector 224 is connected with the first connecting pipe 223, and the other end of the first connector 224 is a water outlet end, which can add water to the water inlet 82 of the kettle cover. One end of the second connector 225 is connected with the first connecting pipe 223, and the other end of the second connector 225 is a water inlet end, which is sealed with the lower water adding column 22 through two connector sealing rings. The first connector 224, the first connecting pipe 223 and the second connector 225 are installed in the lower water adding column 22 installation cavity together, and the upper cover 23 is buckled with the rotary arm 222 of the lower water adding column 22 through the buckle 231. The lower end of the lower water adding column 22 is communicated with the water outlet end of the water pump 6 through the second connecting pipe 4.

[0158] The positioning plate 3 is installed on the support ring 12, and the positioning plate 3 and the support ring 12 are fastened and connected through two screws. The positioning plate 3 is provided with a mounting hole in the middle and a clamping structure on the periphery, and the lower water adding column 22 passes through the mounting hole and is axially limited by the clamping structure. Specifically, the clamping structure of the positioning plate 3 comprises an upper limiting surface and a lower limiting surface, which are matched with the upper shaft shoulder 2213 and the lower shaft shoulder 2214 of the lower water adding column 22 respectively, and the lower water adding column 22 is limited up and down. The lower water adding column 22 is provided with a sealing ring installation groove, and a sealing ring is arranged between the support ring 12 and the lower water adding column 22 to prevent external water flow from entering.

[0159] The lower water column 22 and the motor 5 are provided with a transmission assembly 21 for transmitting torque, and the transmission assembly 21 comprises a first connecting shaft 211, a second connecting shaft 212 and a third connecting shaft 213. The upper and lower ends of the first connecting shaft 211 are both holed, and the upper end of the first connecting shaft 211 is sleeved on the lower end of the lower water column 22. The first connecting shaft 211 and the lower water column 22 are respectively provided with polygonal matching surfaces, and the polygonal matching surface of the lower water column 22 is provided with a positioning rib 22121, and the polygonal matching surface of the first connecting shaft 211 is provided with a positioning groove 21121, the two are connected in transmission through the polygonal matching surfaces, the cooperation of the positioning rib 22121 and the positioning groove 21121 can prevent the installation direction from being mistaken during assembly, and the connection in transmission of the two is more reliable. The lower end of the lower water column 22 and the second connecting pipe 4 connected with the water pump 6 are introduced from the access notch opened on the first connecting shaft 211. The lower end of the first connecting shaft 211 and the upper end of the second connecting shaft 212 are also connected in transmission through polygonal hole shafts.

[0160] A torsion spring as a pre-tightening mechanism 214 is mounted between the first connecting shaft 211 and the second connecting shaft 212, the upper end of the torsion spring abuts against the upper abutting surface 2117 of the lower end of the first connecting shaft 211, the lower end of the torsion spring abuts against the lower abutting surface 2124 of the second connecting shaft 212, and the second connecting shaft 212 is movably connected on the first connecting shaft 211 through a fastening screw. The lower end of the second connecting shaft 212 is provided with a transmission convex rib 2151, the third connecting shaft 213 is provided with a transmission convex point, and the lower end shaft hole 21321 of the third connecting shaft 213 is connected in interference with the flat shaft of the motor 5. When adding water, the motor 5 drives the third connecting shaft 213 to rotate, thereby driving the second connecting shaft 212 to rotate, and further driving the first connecting shaft 211 to rotate through the second connecting shaft 212, and driving the lower water column 22 to rotate above the kettle cover water inlet 82 through the first connecting shaft 211, and the water pump 6 is communicated with the lower water column 22, and automatic water adding is realized by controlling the opening of the water pump 6.

[0161] To avoid the damage of the motor 5 caused by the human force to move the water injector 2, the over-torque protection structure is arranged. The over-torque protection structure comprises the third connecting shaft 213, the over-torque spring as the pre-tightening mechanism 214 and the second connecting shaft 212. The third connecting shaft 213 is provided with the protrusion 2152 with the guide inclined surface 21521, and the second connecting shaft 212 is provided with the protrusion 2151 with the guide inclined surface 21521. Normally, the over-torque spring presses the second connecting shaft 212 downward against the third connecting shaft 213, and the protrusion on the third connecting shaft 213 drives the protrusion 2151 on the second connecting shaft 212. Since the protrusion 2151 on the second connecting shaft 212 and the protrusion on the third connecting shaft 213 are provided with the inclined guide surface, when the external force is too large, the second connecting shaft 212 will compress the over-torque spring and separate from the third connecting shaft 213 to idle, thereby forming the over-torque protection for the motor 5. The motor 5 drives the lower water adding column 22 to rotate, so that the rotation can be performed between the initial position and the water adding position.

[0162] In some embodiments, a transmission assembly 21 comprises:

[0163] The first connecting shaft 211 is adapted to be in transmission connection with the to-be-driven component;

[0164] The third connecting shaft 213 is adapted to be in transmission connection with the power output end of the driving mechanism;

[0165] The second connecting shaft 212 is arranged in transmission between the first connecting shaft 211 and the third connecting shaft 213. The pre-tightening mechanism 214 is arranged between the first connecting shaft 211 and the second connecting shaft 212, and can press the second connecting shaft 212 against the third connecting shaft 213;

[0166] The over-torque protection structure 215 is arranged on the transmission cooperation surface of the second connecting shaft 212 and the third connecting shaft 213. When the torque between the second connecting shaft 212 and the third connecting shaft 213 is greater than the transmission torque, the second connecting shaft 212 can separate from the third connecting shaft 213 along the over-torque protection structure 215.

[0167] As Figure 5As shown, the transmission assembly 21 comprises a first connecting shaft 211, a second connecting shaft 212 and a third connecting shaft 213, the third connecting shaft 213 transmits kinetic energy of the driving mechanism to the second connecting shaft 212, and then transmits the kinetic energy to the to-be-driven component through the first connecting shaft 211 in transmission connection with the second connecting shaft 212, so as to conveniently drive the to-be-driven component to rotate. Since the anti-over-torque structure 215 is arranged on the transmission matching surface of the second connecting shaft 212 and the third connecting shaft 213, when the torque between the second connecting shaft 212 and the third connecting shaft 213 is greater than the transmission torque, the second connecting shaft 212 can be separated from the third connecting shaft 213 along the anti-over-torque structure 215, the torque transmission link is disconnected, damage to the driving mechanism in transmission connection with the third connecting shaft 213 is avoided, and over-torque protection is realized. Moreover, the second connecting shaft 212 is arranged between the third connecting shaft 213 as a power input shaft 2132 and the first connecting shaft 211 as a power output shaft, and the transmission assembly 21 does not affect the to-be-driven component when the over-torque force is axially separated, and axial movement of the to-be-driven component is prevented, thereby avoiding a bad experience for the user.

[0168] In some embodiments, the anti-over-torque structure 215 comprises:

[0169] a convex rib 2151 arranged on one of the end face of the second connecting shaft 212 and the end face of the third connecting shaft 213;

[0170] a convex block 2152 arranged on the other of the end face of the second connecting shaft 212 and the end face of the third connecting shaft 213; the convex block 2152 is in transmission connection with the convex rib 2151.

[0171] The convex rib 2151 and the convex block 2152 are in transmission connection, which serves as both a transmission structure and an anti-over-torque structure 215, and the design is reasonable and the structure is more compact.

[0172] In some embodiments, the convex rib 2151 is provided with a guide surface 21511, and the convex block 2152 is provided with a guide inclined surface 21521, and the convex rib 2151 and the convex block 2152 can be separated along the guide surface 21511 and the guide inclined surface 21521.

[0173] The guide surface 21511 is arranged on the convex rib 2151 and cooperates with the guide inclined surface 21521 on the convex block 2152, and when the torque is greater than the transmission torque, the convex rib 2151 and the convex block 2152 can be guided to separate along the guide surface 21511 and the guide inclined surface 21521, the second connecting shaft 212 and the third connecting shaft 213 are separated, the transmission process is disconnected, and damage to the driving mechanism is avoided.

[0174] In some embodiments, as Figure 6As shown, the first connecting shaft 211 is a hollow cylinder, and an annular step 2111 is formed in the hollow cavity of the first connecting shaft 211, dividing the hollow cavity into a first connecting cavity and a second connecting cavity; the first connecting shaft 211 also includes:

[0175] The first transmission mating surface 2112 is adapted to be connected with the component to be driven, and the first transmission mating surface 2112 is disposed in the first connecting cavity;

[0176] The second transmission mating surface 2113 is adapted to mate with the second connecting shaft 212; the second transmission mating surface 2113 is disposed in the second connecting cavity; one end of the second connecting shaft 212 passes through the second connecting cavity and overlaps the annular step 2111.

[0177] The annular step 2111 formed in the hollow cavity of the first connecting shaft 211 can serve as a limiting structure for the second connecting shaft 212, limiting the axial movement distance of the second connecting shaft 212, preventing excessive axial movement of the second connecting shaft 212 during the process of disengaging from the third connecting shaft 213, and improving the reliability of the transmission assembly 21.

[0178] As shown in the figure, a positioning groove 21121 is also provided on the first transmission mating surface 2112, which is suitable for engaging with the positioning rib 22121 of the water injector 2 to prevent mistaken connection. Two limiting ribs 2114 are also provided on the top outer periphery of the first transmission mating surface 2112. The two limiting ribs 2114 are spaced apart and can cooperate with the limiting ribs 31 on the surrounding environmental parts to limit the rotation angle of the transmission assembly 21.

[0179] It should be noted that a clearance window 2115 is also provided on the pipe wall of the first connecting shaft 211, which allows the water supply pipe to be led out to the second connecting pipe 4 for external water supply device. The first connecting shaft 211 will not drive the water supply pipe to move during rotation, so the water supply pipe will not be bent or other problems, thus extending the service life of the water supply pipe.

[0180] In some embodiments, both the first transmission mating surface 2112 and the second transmission mating surface 2113 include polygonal mating surfaces. The transmission mating surfaces include polygonal mating surfaces, utilizing the meshing of polygons to achieve transmission, resulting in a simple structure, high transmission reliability, and suitability for torque transmission.

[0181] In some embodiments, such as Figure 7 As shown, the second connecting shaft 212 includes:

[0182] The transmission rod 2121 has a third transmission mating surface 21211 that mates with the first connecting shaft 211 on its top periphery near the first connecting shaft 211;

[0183] The skirt 2122 is arranged at the bottom end of the transmission rod 2121 close to the third connecting shaft 213. The bottom end of the skirt 2122 is provided with a fourth transmission matching surface 21221 matched with the third connecting shaft 213. The pre-tightening mechanism 214 is abutted to the annular top surface of the skirt 2122.

[0184] The skirt 2122 is arranged at the bottom end of the transmission rod 2121, thereby increasing the area of the transmission matching surface of the second connecting shaft 212 and the third connecting shaft 213, and facilitating the arrangement of the anti-over-torque structure 215. Moreover, the pre-tightening mechanism 214 is conveniently arranged, so that the pre-tightening force is applied to the second connecting shaft 212, and the second connecting shaft 212 is abutted to the third connecting shaft 213, thereby realizing reliable transmission.

[0185] In some embodiments, the top end of the transmission rod 2121 is provided with a mounting portion, and the mounting portion is provided with a pre-assembled part 2123. The mounting portion can pass through the annular step 2111 and be limited in the first connecting cavity by the pre-assembled part 2123.

[0186] Specifically, the pre-assembled part 2123 is a screw, and the screw head is directly large, so that the second connecting shaft 212 can be supported in the hollow cavity of the first connecting shaft 211, thereby facilitating installation. The second connecting shaft 212 can be lapped at the annular step 2111 by the screw.

[0187] The pre-assembled part 2123 is arranged, so that during the assembly of the transmission assembly 21, the second connecting shaft 212 can be arranged in the cavity of the first connecting shaft 211 to be preliminarily positioned and fixed, thereby preventing the second connecting shaft 212 from falling and improving installation convenience.

[0188] In some embodiments, as shown in Figure 8 The third transmission shaft includes:

[0189] The transmission cap 2131 is provided with a fifth transmission matching surface 21311 matched and connected with the fourth transmission matching surface 21221. The anti-over-torque structure 215 is arranged at the fourth transmission matching surface 21221 and the fifth transmission matching surface 21311.

[0190] The input shaft 2132 is arranged at the side of the transmission cap 2131 away from the fifth transmission matching surface 21311. The input shaft 2132 is provided with a shaft hole 21321, and the power output end of the driving mechanism can be matched and arranged in the shaft hole 21321.

[0191] The power output end of the driving mechanism is directly arranged in the shaft hole 21321 of the third transmission shaft, so that the connection is reliable, and the transmission is stable.

[0192] According to the embodiments of the utility model, on the other hand, a water adding device is also provided, which comprises:

[0193] The water injector 2 is provided with a water inlet 2221.

[0194] drive mechanism

[0195] The drive mechanism is in transmission connection with the water injector 2 through a transmission assembly 21.

[0196] The water injector 2 is driven to rotate by the transmission assembly 21 of the utility model, and the automatic water adding is facilitated. When the water injector 2 encounters an obstacle or a relatively large rotating torque, the transmission assembly 21 can be disconnected from the drive mechanism by the anti-over-torque structure 215, so that the drive mechanism is prevented from being damaged, and the use safety and reliability of the water adding device are improved. Moreover, the third connecting shaft 213 serving as the power input shaft 2132 and the first connecting shaft 211 serving as the power output shaft are provided with the second connecting shaft 212, so that the transmission assembly 21 does not affect the driven component when the over-torque axial separation occurs, the installation of the driven component is more reliable, and the axial movement of the driven component is prevented, so that the user has a bad experience.

[0197] Specifically, the drive mechanism includes a motor 5.

[0198] According to the embodiment of the utility model, in still another aspect, a household appliance is also provided, which includes the above water adding device.

[0199] The household appliance includes the water adding device of the utility model, and therefore has the same technical effects as the water adding device, which will not be described herein.

[0200] The household appliance can be an electric kettle, an electric tea kettle, a cooking appliance, a dishwasher and the like, and can be an electric appliance capable of automatically adding water or a sink capable of automatically injecting water, which will not be specifically limited herein.

[0201] In some embodiments, as shown in Figure 1 、 10 - Figure 12 and Figure 16 , the household appliance is an electric kettle, and the electric kettle includes:

[0202] A kettle body 8 is provided with a water injection port 82; the kettle body 8 is provided with a kettle handle 83 at the top;

[0203] A kettle seat 1 is provided with a containing cavity, and the kettle body 8 is placed in the containing cavity; the water injector 2 is rotatably arranged in the kettle seat 1, and the water injection port 82 is located on the rotating path of the water supply port 2221.

[0204] Since the electric kettle includes the water adding device of the utility model, if the water adding device encounters an obstacle or an overlarge external rotating torque during rotation, the transmission assembly 21 is disconnected, so that the drive mechanism is prevented from being damaged, and the electrical safety is improved.

[0205] As shown in Figures 12-15The utility model discloses a kettle seat 1, including:

[0206] The fixed seat 11 is a top opening cylindrical structure, and the inner cavity of the cylindrical fixed seat 11 is suitable for accommodating the kettle body 8 of the electric kettle.

[0207] The mounting structure is at least partially arranged in the fixed seat 11, and the mounting structure comprises a first mounting portion 115.

[0208] The fixed seat 11 of the kettle seat 1 forms a top opening cylindrical structure, and the kettle body 8 of the electric kettle can be placed in the inner cavity of the fixed seat 11 for heating.

[0209] Specifically, the first mounting portion 115 comprises a positioning lug arranged at the bottom of the side wall of the fixed seat 11, and a positioning hole 1151 is arranged in the positioning lug.

[0210] In some embodiments, the kettle seat 1 further comprises:

[0211] The support ring 12 is arranged at the opening of the fixed seat 11, and part of the mounting structure is arranged on the support ring 12.

[0212] The support ring 12 is arranged at the opening of the fixed seat 11, and the transmission assembly 21 of the water filler 2 is hidden below the support ring 12, thereby improving the appearance.

[0213] In some embodiments, the support ring 12 comprises:

[0214] The ring body 122 is a tubular structure with both ends being open.

[0215] The decorative eave 121 is arranged at the first end of the ring body 122, and the support ring 12 is lapped on the fixed seat 11 through the decorative eave 121.

[0216] The support ring 12 is lapped on the fixing base 11 through the decorative eaves 121 of the first end of the ring body 122; the second end of the ring body 122 extends to the inner cavity of the fixing base 11, and the decorative eaves 121 plays a decorative role and shields the fixing base 11 and the parts mounted on the kettle base 1, which not only improves the appearance but also plays a certain protective role.

[0217] In some embodiments, the mounting structure includes a second mounting portion 123 arranged at the bottom side of the decorative eaves 121.

[0218] The mounting structure arranged at the bottom side of the decorative eaves 121 can conveniently position and fix the parts and other devices of the water injector 2, effectively utilize the space, and improve the connection reliability.

[0219] In some embodiments, the support ring 12 is detachably arranged on the fixing base 11.

[0220] The support ring 12 and the fixing base 11 are detachably mounted together, which is convenient for maintenance and facilitates separate manufacturing and reinstallation, thereby simplifying the manufacturing process.

[0221] In some embodiments, the edge of the fixing base 11 is formed with a gap slot 111.

[0222] The gap slot 111 arranged at the edge of the fixing base 11 can provide the spout 81 of the kettle body 8 to extend out, which can reduce the volume of the kettle base 1 on the one hand and facilitate the discharge and diffusion of steam on the other hand.

[0223] In some embodiments, the support ring 12 is formed with a gap decorative portion 1212 corresponding to the gap slot 111.

[0224] Corresponding to the gap slot 111, the gap decorative portion 1212 is arranged on the support ring 12, which also plays a shielding and decorative role, prevents dust and foreign matters from entering the gap, and can improve the overall appearance and aesthetics.

[0225] In some embodiments, as shown in Figures 14-15 The fixing base 11 is a cylindrical structure, the edge of the opening of the fixing base 11 is provided with a gap slot 111 for the spout 81, and the side wall of the fixing base 11 is provided with a sink 112, the bottom surface of the sink 112 is provided with a through slot hole; the side wall of the ring body 122 of the support ring 12 is provided with a mounting column 124, the mounting column 124 is arranged in the sink 112 and the bottom end of the mounting column 124 extends out through the slot hole. The inner cavity bottom surface of the fixing base 11 is distributed with a plurality of mounting support ribs 114, which can conveniently provide support for the support ring 12 and reserve installation space for the electric heating assembly.

[0226] In some embodiments, the transmission assembly 21 is hiddenly arranged in the kettle base 1.

[0227] The driving assembly is hidden in the base 1, has small volume, does not occupy the space on the table, and is more beautiful.

[0228] In some embodiments, the electric kettle is further provided with a water filler 2 in-place detection device. The in-place detection device comprises:

[0229] The photoelectric switch 7 is connected with the controller of the electric kettle, and the controller is further connected with the driving mechanism;

[0230] The trigger structure is arranged at the top end of the first connecting shaft 211.

[0231] When the driving assembly 21 rotates to a specific position (i.e. the position corresponding to the rotation of the water supply port 2221 above the water filler 82), the trigger structure moves between the emitting part and the receiving part of the photoelectric switch 7, blocks the light transmission between the emitting part and the receiving part, and the photoelectric switch 7 feeds back a signal to the controller. After the controller obtains the signal, the controller controls the driving mechanism to stop, realizes automatic in-place detection and control. The controller is further connected with the water pump 6 or the water supply switch, controls the water pump 6 to start or the water supply switch to open at the same time when the driving mechanism stops, and water is transported to the water supply port 2221 by the water supply device to automatically fill the water filler 82 with water.

[0232] The positioning plate 3 is fixed on the support ring 12, and the photoelectric switch 7 is installed on the positioning plate 3. The photoelectric switch 7 is provided with a clamping groove sensing part, the motor 5 drives the first connecting shaft 211 and the lower water filling column 22 to rotate through a transmission belt, the first connecting shaft 211 is provided with a trigger part 2116, when the lower water filling column 22 rotates directly above the water filler 82, the trigger part 2116 of the first connecting shaft 211 rotates into the clamping groove sensing part of the photoelectric switch 7, the photoelectric switch 7 receives the signal that the lower water filling column 22 rotates to the position, and transmits the signal to the control unit of the electric kettle, controls the motor 5 to stop rotating, and controls the water pump 6 to start working to fill water into the kettle at the same time.

[0233] The positioning plate 3 is provided with a limiting stop rib, and the first connecting shaft 211 is provided with a first limiting rib 2114 and a second limiting rib 2114. When the water filling column is in the initial position, the first limiting rib 2114 cooperates with the front surface of the limiting stop rib 31, and when the water filling column is in the water filling position, the second limiting rib 2114 cooperates with the back surface of the limiting stop rib 31, so as to limit the rotation angle of the lower water filling column 22 between the initial position and the water filling position. After the water filling is completed, the lower water filling column 22 returns to the initial position.

[0234] The household appliance can be an electric kettle, an electric tea kettle, a cooking appliance, a dishwasher, and the like, and can be an electric appliance capable of realizing automatic water filling or a sink capable of realizing automatic water filling, without specific limitation.

[0235] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the present application.

Claims

1. A method for adding a water column from below, characterized in that, include: The main body of the pipe fitting (221) has a water inlet hole (2211) at the water inlet end; A swivel arm (222) is provided at the outlet end of the main body (221) of the pipe fitting; the swivel arm (222) has a groove-shaped structure with an open top surface, and a water inlet (2221) is provided on the bottom side of the swivel arm (222), and a water filling channel is formed between the water inlet (2211) and the water inlet (2221); The main body (221) of the pipe fitting has a mating structure (2212) formed on its periphery near its water inlet end. The mating structure (2212) is adapted to be connected to the drive mechanism via a transmission assembly (21). The drive mechanism can drive the lower water column (22) to rotate so that the water supply port (2221) moves above the water-using device.

2. The water column supply according to claim 1, characterized in that, The water column (22) further includes: The first connecting pipe (223) is disposed in the groove (2222) of the rotating arm (222); The first connector (224) is disposed in the groove (2222) of the rotating arm (222); the first end of the first connector (224) is connected to the end of the first connecting pipe (223) near the water supply port (2221), and the second end of the first connector (224) is connected to the water supply port (2221); The second connector (225) is partially disposed in the groove (2222) of the rotating arm (222); the first end of the second connector (225) is connected to the end of the first connecting pipe (223) near the pipe body (221), and the second end of the second connector (225) is connected to the pipe body (221) and communicates with the water inlet (2211).

3. The water column supply according to claim 1, characterized in that, The main body (221) of the pipe fitting is provided with an upper shoulder (2213) and a lower shoulder (2214) on its periphery, which are suitable for connection with the environmental component to achieve axial positioning of the lower water column (22).

4. The water column supply according to claim 3, characterized in that, The bottom end of the main body (221) of the pipe fitting is provided with a connecting post (2215), and the water inlet (2211) is located at the end of the connecting post (2215); the mating structure (2212) is provided between the connecting post (2215) and the lower shoulder (2214).

5. The water column supply according to claim 1, characterized in that, The water column (22) further includes: A positioning rib (22121) or positioning groove (21121) is provided at the mating structure (2212) and is adapted to match and connect with the positioning groove (21121) or positioning rib (22121) on the transmission assembly (21).

6. The water column supplied according to any one of claims 1 to 5, characterized in that, The main body (221) of the pipe fitting is integrally formed with the rotating arm (222).

7. A water injector, characterized in that, include: The water column (22) is added according to any one of claims 1 to 6; The top cover (23) is fastened to the opening of the rotating arm (222) of the lower water column (22).

8. The water injector according to claim 7, characterized in that, The rotating arm (222) is provided with a buckle (2223), and the upper cover (23) is provided with a snap fastener (231). The upper cover (23) is detachably connected to the rotating arm (222) through the snap fastener (231) and the buckle (2223).

9. A water-adding device, characterized in that, include: Water supply components, connected to the water source; The water injector (2) according to any one of claims 7 to 8, wherein the main body (221) of the pipe fitting is connected to the water supply assembly; Transmission assembly (21); The drive mechanism is connected to the water injector (2) via the transmission assembly (21).

10. The water adding device according to claim 9, characterized in that, The transmission assembly (21) includes: The first connecting shaft (211) is adapted to be connected to the component to be driven in a transmission manner; The third connecting shaft (213) is suitable for transmission connection with the power output end of the drive mechanism; The second connecting shaft (212) is driven between the first connecting shaft (211) and the third connecting shaft (213); a pre-tightening mechanism (214) is provided between the first connecting shaft (211) and the second connecting shaft (212) to press the second connecting shaft (212) against the third connecting shaft (213); An anti-torsion structure (215) is provided on the transmission mating surface of the second connecting shaft (212) and the third connecting shaft (213); when the torque between the second connecting shaft (212) and the third connecting shaft (213) is greater than the transmission torque, the second connecting shaft (212) can disengage from the third connecting shaft (213) along the anti-torsion structure (215).

11. The water adding device according to claim 10, characterized in that, The anti-torsion structure (215) includes: A rib (2151) is provided on one of the end faces of the second connecting shaft (212) and the third connecting shaft (213); A protrusion (2152) is disposed on one of the end faces of the second connecting shaft (212) and the third connecting shaft (213); the protrusion (2152) is in a transmission engagement with the rib (2151).

12. The water adding device according to claim 11, characterized in that, The rib (2151) is provided with a guide surface (21511), and the protrusion (2152) is provided with a guide slope (21521). The rib (2151) and the protrusion (2152) can disengage from the guide slope (21521) along the guide surface (21511).

13. The water adding device according to claim 10, characterized in that, The first connecting shaft (211) is a hollow cylinder, and an annular stepped surface (2111) is formed in the hollow cavity of the first connecting shaft (211), dividing the hollow cavity into a first connecting cavity and a second connecting cavity; the first connecting shaft (211) further includes: The first transmission mating surface (2112) is adapted to be connected with the component to be driven, and the first transmission mating surface (2112) is disposed in the first connecting cavity; The second transmission mating surface (2113) is adapted to be mated and connected with the second connecting shaft (212); the second transmission mating surface (2113) is disposed in the second connecting cavity; one end of the second connecting shaft (212) passes through the second connecting cavity and overlaps the annular step (2111).

14. The water adding device according to claim 13, characterized in that, Both the first transmission mating surface (2112) and the second transmission mating surface (2113) include polygonal mating surfaces.

15. The water adding device according to claim 13, characterized in that, The second connecting shaft (212) includes: The transmission rod (2121) has a third transmission mating surface (21211) that mates with the first connecting shaft (211) on its top periphery near the first connecting shaft (211); A skirt (2122) is provided on the transmission rod (2121) near the bottom end of the third connecting shaft (213); the bottom end of the skirt (2122) is provided with a fourth transmission mating surface (21221) that mates with the third connecting shaft (213), and the pre-tightening mechanism (214) abuts against the annular top surface of the skirt (2122).

16. The water adding device according to claim 15, characterized in that, The top end of the transmission rod (2121) is provided with a mounting part, and a pre-installed part (2123) is provided on the mounting part. The mounting part can pass through the surface of the annular step (2111) and be confined within the first connecting cavity by the pre-installed part (2123).

17. The water adding device according to claim 15 or 16, characterized in that, The third connecting shaft (213) includes: The transmission cap (2131) is provided with a fifth transmission mating surface (21311) that is connected to the fourth transmission mating surface (21221); the anti-torsion structure (215) is provided on the fourth transmission mating surface (21221) and the fifth transmission mating surface (21311); An input shaft (2132) is disposed on the side of the transmission cap (2131) away from the fifth transmission mating surface (21311); a shaft hole (21321) is provided on the input shaft (2132), and the power output end of the drive mechanism can be matched and disposed in the shaft hole (21321).

18. A household appliance, characterized in that, It includes the water inlet column (22) according to any one of claims 1 to 6, or the water injector (2) according to claims 7 or 8, or the water filling device according to any one of claims 9 to 17.

19. The household appliance according to claim 18, characterized in that, The household appliances also include: Base; The positioning plate (3) is used to fix the water column (22) to the base.

20. The household appliance according to claim 18 or 19, characterized in that, The household appliance in question is an electric kettle.

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