Milk warming device

Abstract

The utility model discloses a kind of milk adjusting devices, the milk adjusting device includes shell, rotating member and feeding bottle support, the shell has accommodating groove, the rotating member is located in the accommodating groove and rotatable relative to the shell, at least part of the feeding bottle support is located in the accommodating groove, the bottom of the feeding bottle support is equipped with first cooperation part, the top of the rotating member is equipped with second cooperation part, one of the first cooperation part and the second cooperation part includes recess, the other of the first cooperation part and the second cooperation part includes convex part, the convex part and the recess are matched by slope to make the feeding bottle support and the rotating member detachably connected. The milk adjusting device in the utility model embodiment is convenient to install and disassemble feeding bottle support, and improve user experience.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, specifically to a milk preparation device. Background Technology

[0002] The formula mixing device includes a housing and a bottle holder. The bottle holder is located inside the housing and is suitable for placing bottles so that the formula powder and water in the bottles can be shaken evenly.

[0003] In related technologies, the bottle holder is detachable from the housing to facilitate cleaning when milk or foreign objects enter the holder. However, the installation and removal of the bottle holder in these technologies is inconvenient, impacting the user experience. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a formula mixing device with a bottle holder that is easy to install and remove, thus improving the user experience.

[0005] The formula preparation device of this utility model embodiment includes:

[0006] The housing has a receiving groove;

[0007] A rotating component, which is disposed within the receiving groove and is rotatable relative to the housing;

[0008] A bottle holder, at least a portion of which is disposed within the receiving groove, has a first mating portion at its bottom and a second mating portion at its top of the rotating member. One of the first and second mating portions includes a recess, and the other of the first and second mating portions includes a protrusion. The protrusion and the recess are engaged by a bevel so that the bottle holder and the rotating member are detachably connected.

[0009] In this embodiment of the formula preparation device, the concave portion of one of the first and second mating portions engages with the convex portion of the other through a bevel, making it convenient to install the bottle holder in the receiving groove and easy to remove the bottle holder from the receiving groove. This facilitates cleaning the bottle holder and prevents it from being damaged during removal, thus improving the user experience.

[0010] Optionally, one of the first mating part and the second mating part further includes a boss, and the recess is provided on the end face of the free end of the boss. The other of the first mating part and the second mating part further includes a groove, and the boss fits into the groove, and the protrusion is provided on the bottom surface of the groove.

[0011] In the formula mixing device of this utility model embodiment, when the first mating part and the second mating part are mated, the groove can limit the boss, ensuring that the concave part on the boss and the convex part in the groove are mated with high precision and quickness, thereby improving the installation efficiency of the bottle holder in the receiving groove.

[0012] Optionally, the protrusion includes a first protruding section with a circular cross-section, and the recess includes a first recessed section, the sidewall of the first recessed section being adapted to the outer peripheral surface of the first protruding section, and the inclined surface of the first protruding section fitting within the first recessed section.

[0013] In this embodiment of the formula preparation device, the first convex section has a circular cross-section and is adapted to the side wall of the first concave section. When the convex and concave parts are engaged, the first convex section is engaged within the first concave section. The engagement method is simple and can further improve the engagement between the convex and concave parts, ensuring the stability of the bottle holder installed in the receiving groove.

[0014] Optionally, the diameter of the first protrusion gradually decreases in the direction away from the bottom surface of the groove.

[0015] In the formula mixing device of this utility model embodiment, the first convex section gradually decreases in the direction away from the bottom surface of the groove. When the first convex section and the first concave section are engaged, the first convex section can guide the first concave section, making it easier for the first convex section to slide into the first concave section and improving the engagement efficiency of the convex and concave parts.

[0016] Optionally, the protrusion further includes a second protruding segment, which extends radially outward from the outer peripheral surface of the first protruding segment. The recess further includes a second recessed segment, one end of which communicates with the first recessed segment, and the other end of which extends radially outward from the first recessed segment. The inclined surface of the second protruding segment fits into the second recessed segment.

[0017] In this embodiment of the formula preparation device, the second convex section and the second concave section are inclined to cooperate, which makes it convenient for the second convex section and the second concave section to cooperate. It can also limit the concave part, so that the concave part is not easily rotated relative to the convex part by external force when the concave part and the convex part are cooperated, thus ensuring the stability of the cooperation between the concave part and the convex part and ensuring the stability of the bottle holder installed in the receiving groove.

[0018] Optionally, the second convex segment has opposing first and second side surfaces along the circumferential direction of the first convex segment, at least one of the first and second side surfaces being inclined relative to the axial direction of the housing with an inclination angle of α, 1° < α < 60°, and the sidewall surface of the second concave segment is adapted to the first and second side surfaces.

[0019] In the formula preparation device of this utility model embodiment, at least one of the first side and the second side has an inclination angle of 1° < α < 60° relative to the axial direction of the housing, and the side wall of the second concave section is adapted to the first side and the second side. The second convex section can guide the second concave section, ensuring that the second concave section and the second convex section are easy to match and highly efficient, and that the second concave section and the second convex section are easy to disassemble.

[0020] Optionally, the distance between the first side and the second side in the circumferential direction of the first protrusion gradually decreases in the direction away from the bottom surface of the groove.

[0021] In the formula preparation device of this utility model embodiment, the first side and the second side can guide the side wall of the second concave section through the above-mentioned arrangement, which facilitates the engagement and disassembly of the second concave section and the second convex section.

[0022] Optionally, there are multiple second convex segments, which are arranged at circumferential intervals along the first convex segment. There are also multiple second concave segments, which correspond one-to-one with the multiple second convex segments.

[0023] In this embodiment of the formula preparation device, multiple second concave sections correspond one-to-one with multiple second convex sections and cooperate, further improving the fit between the concave and convex sections. The concave and convex sections can limit each other, ensuring that the bottle holder is stably installed in the receiving groove.

[0024] Optionally, the recess is provided on the bottle holder, the protrusion is provided on the rotating member, the formula preparation device further includes a drive motor, the top of the drive motor has a motor shaft, the bottom surface of the rotating member is provided with a mating hole extending to the first protrusion, and the motor shaft passes through the mating hole to connect with the rotating member.

[0025] The formula preparation device of this utility model uses a drive motor to drive a rotating component to rotate relative to the housing via a motor shaft, thereby causing the bottle holder to rotate relative to the housing. It is simple to operate and easy to implement.

[0026] Optionally, the groove is provided on the top surface of the rotating member, the boss is provided on the bottom surface of the bottle holder, and the bottom surface of the rotating member is provided with a protrusion, the protrusion being a side wall that forms at least a portion of the groove;

[0027] The formula preparation device also includes a bearing, which is arranged around the protrusion;

[0028] The bottom surface of the receiving groove has a recess, the bearing is placed in the recess, and the outer ring of the bearing is connected to the housing.

[0029] In this embodiment of the formula preparation device, the groove extends downward from the top surface of the rotating part to the protrusion. The boss is inserted into the groove and cooperates with it, which can reduce the gap between the bottom surface of the bottle holder and the top surface of the rotating part, and improve the fit and compactness of the bottle holder and the rotating part. The bearing is located in the recess, saving installation space. The bearing is arranged around the protrusion and the outer ring of the bearing is connected to the housing, so that the rotating part can rotate relative to the housing, and thus the bottle holder can rotate relative to the housing. The operation is simple and cost-effective.

[0030] Optionally, the bottom surface of the bottle holder includes a first support surface surrounding the first mating part, and the top surface of the rotating member includes a second support surface surrounding the second mating part, wherein the first support surface and the second support surface are in contact.

[0031] In this embodiment of the formula preparation device, the first support surface and the second support surface are fitted together, so that the first mating part and the second mating part fit together tightly, and the second mating part can support the first mating part, ensuring that the bottle holder is stably installed on the rotating part.

[0032] Optionally, the area of ​​the first support surface is S1, the area of ​​the second support surface is S2, and the ratio of S2 to S1 is A, where 0.3 ≤ A ≤ 1.

[0033] In the formula preparation device of this embodiment, the ratio of the area of ​​the second support surface to the area of ​​the first support surface is 0.3≤A≤1, and the area of ​​the first support surface is greater than or equal to the area of ​​the second support surface, ensuring that the bottle holder is stably installed on the rotating part. Attached Figure Description

[0034] Figure 1 This is an overall schematic diagram of the formula preparation device according to an embodiment of the present invention.

[0035] Figure 2 This is an exploded schematic diagram of the milk preparation device according to an embodiment of the present invention.

[0036] Figure 3 This is a cross-sectional view of the formula preparation device according to an embodiment of the present invention.

[0037] Figure 4 This is a cross-sectional view of the milk preparation device according to an embodiment of the present invention from another angle.

[0038] Figure 5 yes Figure 3 An enlarged schematic diagram of part A in the middle.

[0039] Figure 6 This is a schematic diagram of the bottom surface of the bottle holder of the formula preparation device according to an embodiment of this utility model.

[0040] Figure 7This is a schematic diagram of the first mating part of the milk preparation device according to an embodiment of the present utility model.

[0041] Figure 8 This is a top view of the housing of the milk preparation device according to an embodiment of the present invention.

[0042] Figure 9 This is a schematic diagram of the second mating part of the milk preparation device according to an embodiment of the present invention.

[0043] Reference numerals: 100, formula preparation device; 1, shell; 11, receiving groove; 12, inner shell; 121, bottom wall; 122, peripheral wall; 13, outer shell; 14, recessed part; 2, rotating part; 21, mating hole; 22, protrusion; 23, second support surface; 3, bottle holder; 31, first support surface; 41, first mating part; 42, second mating part; 43, recessed part; 431, first recessed section; 432, second recessed section; 4321, first side wall; 4322, second side wall; 44, protrusion; 441, first protruding section; 442, second protruding section; 4421, first side surface; 4422, second side surface; 45, boss; 46, groove; 5, drive motor; 51, motor shaft; 6, bearing. Detailed Implementation

[0044] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0045] like Figures 1-9 As shown, the formula preparation device of this embodiment includes a housing 1, a rotating member 2, and a bottle holder 3. The housing 1 has a receiving groove 11. The rotating member 2 is disposed in the receiving groove 11 and is rotatable relative to the housing 1. At least a portion of the bottle holder 3 is disposed in the receiving groove 11. The bottom of the bottle holder 3 is provided with a first mating part 41, and the top of the rotating member 2 is provided with a second mating part 42. One of the first mating part 41 and the second mating part 42 includes a recess 43, and the other of the first mating part 41 and the second mating part 42 includes a protrusion 44. The protrusion 44 and the recess 43 are engaged by a bevel so that the bottle holder 3 and the rotating member 2 are detachably connected.

[0046] In this embodiment of the formula preparation device, the concave portion 43 of one of the first mating portion 41 and the convex portion 44 of the other of the first mating portion 41 and the second mating portion 42 are engaged by a bevel, which makes it easy to install the bottle holder 3 in the receiving groove 11 and also easy to remove the bottle holder 3 from the receiving groove 11, making it convenient to clean the bottle holder 3. Moreover, the bottle holder 3 is not easily damaged during disassembly, thus improving the user experience.

[0047] Optionally, such as Figures 3-5 As shown, one of the first mating part 41 and the second mating part 42 further includes a boss 45, and a recess 43 is provided on the end face of the free end of the boss 45. The other of the first mating part 41 and the second mating part 42 further includes a groove 46, in which the boss 45 is fitted into the groove 46, and a protrusion 44 is provided on the bottom surface of the groove 46.

[0048] Specifically, taking the example of the first mating part 41 having a recess 43 and the second mating part 42 having a protrusion 44, the following description will be provided. The boss 45 is formed by protruding downward from the bottom surface of the first mating part 41, and the recess 43 is formed on the bottom surface of the boss 45. The groove 46 is formed by recessing downward from the top surface of the second mating part 42, and the protrusion 44 is provided on the bottom surface of the groove 46.

[0049] When the first mating part 41 and the second mating part 42 are mated, the groove 46 can limit the boss 45, ensuring that the recess 43 on the boss 45 and the protrusion 44 in the groove 46 are mated with high precision and quickness, thereby improving the installation efficiency of the bottle holder 3 in the receiving groove 11.

[0050] Optionally, such as Figure 7 and Figure 9 As shown, the protrusion 44 includes a first protruding section 441, which has a circular cross-section. The recess 43 includes a first recessed section 431, the sidewall of which is adapted to the outer peripheral surface of the first protruding section 441, and the inclined surface of the first protruding section 441 fits into the first recessed section 431.

[0051] Specifically, the first protruding section 441 is located in the middle of the bottom surface of the groove 46, and the first concave section 431 is located in the middle of the boss 45 and is arranged opposite to the first protruding section 441. The cross-section of the first protruding section 441 is circular and fits the side wall of the first concave section 431. When the protrusion 44 and the concave section 43 are engaged, the first protruding section 441 is engaged in the first concave section 431. The engagement method is simple and can further improve the engagement between the protrusion 44 and the concave section 43, ensuring the stability of the bottle holder 3 installed in the receiving groove 11.

[0052] Optionally, the diameter of the first protrusion 441 gradually decreases along the direction away from the bottom surface of the groove 46.

[0053] Specifically, the first convex section 441 gradually decreases in the direction away from the bottom surface of the groove 46. When the first convex section 441 and the first concave section 431 are engaged, the first convex section 441 can guide the first concave section 431, making it easier for the first convex section 441 to slide into the first concave section 431 and improving the engagement efficiency of the convex part 44 and the concave part 43.

[0054] Optionally, such as Figure 7 and Figure 9As shown, the protrusion 44 further includes a second protrusion 442, which extends radially outward from the outer peripheral surface of the first protrusion 441. The recess 43 further includes a second recess 432, one end of which communicates with the first recess 431, and the other end of which extends radially outward from the first recess 431. The inclined surface of the second protrusion 442 fits within the second recess 432.

[0055] Specifically, the second convex section 442 and the second concave section 432 are inclined to make the second convex section 442 and the second concave section 432 easy to fit together, and can limit the concave part 43 so that the concave part 43 is not easily rotated relative to the convex part 44 when it is fitted with the convex part 44, thus ensuring the stability of the fit between the concave part 43 and the convex part 44 and ensuring the stability of the bottle holder 3 installed in the receiving groove 11.

[0056] Optionally, such as Figure 5 As shown, the second convex segment 442 has a first side surface 4421 and a second side surface 4422 opposite to each other along the circumference of the first convex segment 441. At least one of the first side surface 4421 and the second side surface 4422 is inclined relative to the axial direction of the housing 1, and the inclination angle is α, 1° < α < 60°. The side wall surface of the second concave segment 432 is adapted to the first side surface 4421 and the second side surface 4422.

[0057] Specifically, at least one of the first side surface 4421 and the second side surface 4422 is inclined relative to the axial direction of the housing 1. The side wall of the second concave section 432 is adapted to the first side surface 4421 and the second side surface 4422. The second convex section 442 can guide the second concave section 432, ensuring that the second concave section 432 and the second convex section 442 are easy to fit together and highly efficient, and that the second concave section 432 and the second convex section 442 are easy to disassemble.

[0058] If α is less than or equal to 1°, at least one of the first side surface 4421 and the second side surface 4422 has a smaller tilt angle relative to the axial direction of the housing 1, and at least one of the first side surface 4421 and the second side surface 4422 is steeper. The first side surface 4421 and the second side surface 4422 are not conducive to guiding the side wall surface of the second concave section 432.

[0059] If α is greater than or equal to 60°, then at least one of the first side surface 4421 and the second side surface 4422 has a large tilt angle relative to the axial direction of the housing 1, and at least one of the first side surface 4421 and the second side surface 4422 is relatively flat. The second convex section 442 and the second concave section 432 do not fit tightly enough, and it is easy for the first mating part 41 and the second mating part 42 to rotate relative to each other.

[0060] Specifically, the sidewall surface of the second recess 432 has a first sidewall 4321 and a second sidewall 4322 opposite to each other along the circumferential direction of the first recess 431. At least one of the first sidewall 4321 and the second sidewall 4322 is inclined relative to the axial direction of the housing 1, and the inclination angle is consistent with the first sidewall 4421 or the second sidewall 4422. The first sidewall 4321 is adapted to the first sidewall 4421, and the second sidewall 4322 is adapted to the second sidewall 4422.

[0061] Optionally, such as Figure 9 As shown, the distance between the first side surface 4421 and the second side surface 4422 in the circumferential direction of the first convex section 441 gradually decreases in the direction away from the bottom surface of the groove 46. The first side surface 4421 and the second side surface 4422 can guide the side wall surface of the second concave section 432, which facilitates the engagement and disassembly of the second concave section 432 and the second convex section 442.

[0062] Optionally, such as Figure 9 As shown, there are multiple second convex segments 442, which are arranged at intervals along the circumference of the first convex segment 441. There are multiple second concave segments 432, which correspond one-to-one with the multiple second convex segments 442.

[0063] Specifically, multiple second concave sections 432 correspond one-to-one with multiple second convex sections 442 and cooperate, further improving the fit between the concave part 43 and the convex part 44. The concave part 43 and the convex part 44 can limit each other, ensuring that the bottle holder 3 is installed stably in the receiving groove 11.

[0064] Optionally, such as Figures 3-5 As shown, the recess 43 is provided on the bottle holder 3, and the protrusion 44 is provided on the rotating member 2. The formula preparation device also includes a drive motor 5, the top of the drive motor 5 has a motor shaft 51, and the bottom surface of the rotating member 2 is provided with a mating hole 21 extending to the first protrusion 441. The motor shaft 51 passes through the mating hole 21 to connect with the rotating member 2.

[0065] Specifically, the central axis of the mating hole 21 is collinear with the central axis of the first protrusion 441. The drive motor 5 drives the rotating part 2 to rotate relative to the housing 1 through the motor shaft 51, thereby causing the bottle holder 3 to rotate relative to the housing 1. The operation is simple and easy to implement.

[0066] Optionally, such as Figure 3 and Figure 4 As shown, the housing 1 includes an inner shell 12 and an outer shell 13. The inner shell 12 is located inside the outer shell 13. The inner shell 12 has a bottom wall 121 and a peripheral wall 122. The peripheral wall 122 is located on the outer periphery of the bottom wall 121, and the bottom wall 121 and the peripheral wall 122 form a receiving groove 11. The rotating member 2 is provided on the bottom wall 121 and is rotatable relative to the bottom wall 121.

[0067] Optionally, such as Figure 9 The groove 46 is provided on the top surface of the rotating member 2, the boss 45 is provided on the bottom surface of the bottle holder 3, and the bottom surface of the rotating member 2 is provided with a protrusion 22, which is at least part of the side wall surrounding the groove 46.

[0068] Specifically, the groove 46 extends downward from the top surface of the rotating part 2 to the protrusion 22, and the boss 45 is inserted into the groove 46 to cooperate with the groove 46, which can reduce the gap between the bottom surface of the bottle holder 3 and the top surface of the rotating part 2, and improve the fit and compactness of the bottle holder 3 and the rotating part 2.

[0069] Optionally, such as Figures 3-5 As shown, the formula preparation device 100 also includes a bearing 6, which is arranged around the protrusion 22. The bottom surface of the receiving groove 11 has a recess 14, the bearing 6 is placed in the recess 14, and the outer ring of the bearing 6 is connected to the housing 1.

[0070] Specifically, the bearing 6 is located in the recess 14, saving installation space. The bearing 6 is arranged around the protrusion 22. The inner ring of the bearing 6 is connected to the outer peripheral surface of the protrusion 22, and the outer ring of the bearing 6 is connected to the bottom wall 121, so that the rotating part 2 can rotate relative to the housing 1, and thus the bottle holder 3 can rotate relative to the housing 1. The operation is simple and cost-saving.

[0071] Optionally, such as Figure 5 As shown, the bottom surface of the bottle holder 3 includes a first support surface 31 surrounding the first mating part 41, and the top surface of the rotating part 2 includes a second support surface 23 surrounding the second mating part 42. The first support surface 31 and the second support surface 23 are in contact.

[0072] Specifically, the first support surface 31 and the second support surface 23 fit together, so that the first mating part 41 and the second mating part 42 fit together tightly, and the second mating part 42 can support the first mating part 41, ensuring that the bottle holder 3 is securely installed on the rotating part 2.

[0073] Optionally, the area of ​​the first support surface 31 is S1, the area of ​​the second support surface 23 is S2, and the ratio of S2 to S1 is A, where 0.3 ≤ A ≤ 1.

[0074] In this embodiment of the formula preparation device, the ratio of the area of ​​the second support surface 23 to the area of ​​the first support surface 31 is 0.3≤A≤1, and the area of ​​the first support surface 31 is greater than or equal to the area of ​​the second support surface 23, ensuring that the bottle holder 3 is stably installed on the rotating part 2.

[0075] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0076] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0077] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0078] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0079] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0080] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A formula preparation device, characterized in that, include: The housing (1) has a receiving groove (11); Rotating component (2), which is disposed in the receiving groove (11) and is rotatable relative to the housing (1); A bottle holder (3) is provided, at least a portion of which is disposed in the receiving groove (11). The bottom of the bottle holder (3) is provided with a first mating part (41), and the top of the rotating member (2) is provided with a second mating part (42). One of the first mating part (41) and the second mating part (42) includes a recess (43), and the other of the first mating part (41) and the second mating part (42) includes a protrusion (44). The protrusion (44) and the recess (43) are engaged by a bevel so that the bottle holder (3) and the rotating member (2) are detachably connected.

2. The formula preparation device according to claim 1, characterized in that, One of the first mating part (41) and the second mating part (42) further includes a boss (45), and the recess (43) is provided on the end face of the free end of the boss (45). The other of the first mating part (41) and the second mating part (42) further includes a groove (46), and the boss (45) is fitted in the groove (46). The protrusion (44) is provided on the bottom surface of the groove (46).

3. The formula preparation device according to claim 2, characterized in that, The protrusion (44) includes a first protruding section (441) with a circular cross-section. The recess (43) includes a first recessed section (431) with the sidewall of the first recessed section (431) adapted to the outer peripheral surface of the first protruding section (441) and the inclined surface of the first protruding section (441) fits into the first recessed section (431).

4. The formula preparation device according to claim 3, characterized in that, The diameter of the first protrusion (441) gradually decreases along the direction away from the bottom surface of the groove (46).

5. The formula preparation device according to claim 3, characterized in that, The protrusion (44) further includes a second protrusion (442), which extends radially outward from the outer peripheral surface of the first protrusion (441). The recess (43) further includes a second recess (432), one end of which communicates with the first recess (431), and the other end of which extends radially outward from the first recess (431). The inclined surface of the second protrusion (442) fits into the second recess (432).

6. The formula preparation device according to claim 5, characterized in that, The second convex segment (442) has opposing first side surface (4421) and second side surface (4422) along the circumferential direction of the first convex segment (441). At least one of the first side surface (4421) and the second side surface (4422) is inclined relative to the axial direction of the housing (1) with an inclination angle of α, 1° < α < 60°. The sidewall surface of the second concave segment (432) is adapted to the first side surface (4421) and the second side surface (4422).

7. The formula preparation device according to claim 6, characterized in that, The distance between the first side surface (4421) and the second side surface (4422) in the circumferential direction of the first protrusion (441) gradually decreases in the direction away from the bottom surface of the groove (46).

8. The formula preparation device according to claim 5, characterized in that, There are multiple second convex segments (442), and the multiple second convex segments (442) are arranged at intervals along the circumference of the first convex segment (441). There are multiple second concave segments (432), and the multiple second concave segments (432) correspond one-to-one with the multiple second convex segments (442).

9. The formula preparation device according to claim 3, characterized in that, The recess (43) is provided on the bottle holder (3), the protrusion (44) is provided on the rotating member (2), the formula preparation device also includes a drive motor (5), the top of the drive motor (5) has a motor shaft (51), the bottom surface of the rotating member (2) is provided with a mating hole (21) extending to the first protrusion (441), and the motor shaft (51) passes through the mating hole (21) to connect with the rotating member (2).

10. The formula preparation device according to any one of claims 2-9, characterized in that, The groove (46) is provided on the top surface of the rotating member (2), the boss (45) is provided on the bottom surface of the bottle support (3), and the bottom surface of the rotating member (2) is provided with a protrusion (22), which is at least part of the sidewall surrounding the groove (46). The milk preparation device also includes a bearing (6) which is arranged around the protrusion (22); The bottom surface of the receiving groove (11) has a recess (14), the bearing (6) is placed in the recess (14), and the outer ring of the bearing (6) is connected to the housing (1).

11. The formula preparation device according to any one of claims 1-9, characterized in that, The bottom surface of the bottle holder (3) includes a first support surface (31) surrounding the first mating part (41), and the top surface of the rotating part (2) includes a second support surface (23) surrounding the second mating part (42). The first support surface (31) and the second support surface (23) are in contact.

12. The formula preparation device according to claim 11, characterized in that, The area of ​​the first support surface (31) is S1, the area of ​​the second support surface (23) is S2, the ratio of S2 to S1 is A, and 0.3≤A≤1.

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