A hand-held whisking device

Abstract

This invention discloses a handheld mixing device, comprising an upper housing containing electrical and driving components. A lower end cover is located at the bottom of the upper housing, allowing the mixing component to be inserted and connected to the driving component. A detachable structure is provided between the lower end cover and the upper housing. This invention, by providing a detachable structure between the upper housing and the lower end cover, allows users to easily separate the two, facilitating thorough cleaning of the device's interior, eliminating hard-to-reach areas, and ensuring hygienic use. Furthermore, the detachable design also facilitates the inspection and replacement of the internal electrical or driving components, greatly improving the device's maintainability, extending its service life, and avoiding resource waste caused by partial damage leading to the scrapping of the entire machine.

Description

[Technical Field] This utility model relates to the field of small kitchen appliances, and in particular to a handheld mixing device. [Background Technology] Handheld mixing devices, such as handheld milk frothers and handheld egg beaters, are widely used in home kitchens and commercial catering due to their compact size, portability, and ease of use.

[0001] Existing handheld mixing devices typically include an upper housing containing a motor and other drive components, and a lower end cap for the mixing element to extend out. To facilitate manufacturing or ensure structural sealing, the upper housing and lower end cap of existing handheld mixing devices are generally fixed together, for example, by adhesive bonding, ultrasonic welding, or by designing them as a single integrated structure.

[0002] This fixed structural design leads to two major technical drawbacks: First, it is difficult to clean thoroughly. During use, liquids such as milk and egg liquid can easily splash into the interior of the casing through the gap between the stirring component and the lower cap. Since the lower cap cannot be removed, these areas become unsanitary, making it difficult for users to thoroughly clean and dry them. Over time, bacteria can easily grow and odors can develop, affecting food safety.

[0003] Secondly, maintenance is difficult. When internal drive or electrical components fail, the one-piece or fixed housing structure prevents users or maintenance personnel from opening the equipment without damage, making it difficult to inspect, repair, or replace internal components. This often results in the entire device being scrapped, wasting resources and shortening the product's lifespan. [Utility Model Content] The purpose of this utility model is to provide a handheld stirring device, which aims to solve the technical problems of the existing handheld stirring device, such as difficulty in cleaning the inside and inconvenience in maintenance, caused by the fixed connection between the shell and the bottom cover.

[0004] This utility model is achieved through the following technical solution: A handheld stirring device includes an upper housing, an electrical component and a drive component are disposed inside the upper housing, a lower end cover is provided at the bottom of the upper housing, the lower end cover is provided for the stirring component to be inserted and connected to the drive component, and a detachable structure is provided between the lower end cover and the upper housing.

[0005] As described above, the detachable structure of the handheld stirring device is a snap-fit ​​structure, which includes at least two first snap-fit ​​parts and corresponding first latching parts. At least two first snap-fit ​​parts are disposed on one of the upper housing or the lower end cover, and at least two first latching parts are disposed on the other.

[0006] As described above, in the handheld stirring device, at least two first snap-fit ​​parts are evenly distributed along the upper circumference of the lower end cover, and at least two first snap-fit ​​parts are located at the bottom of the upper housing.

[0007] As described above, the first latching part includes a latching groove located on the periphery of the bottom of the upper housing, and an elastic latching arm extending from the latching groove to engage with the first latching part.

[0008] As described above, the handheld stirring device also includes a positioning mechanism for limiting and guiding between the lower end cap and the upper housing.

[0009] As described above, the handheld stirring device has at least one positioning groove on the inner wall of the lower end cover and at least one positioning part on the bottom periphery of the upper housing, and the positioning part corresponds one-to-one with the positioning groove.

[0010] The handheld stirring device described above also includes a storage cylinder that can cooperate with the lower end cap to accommodate the stirring component, and the bottom of the storage cylinder is provided with at least one drain hole to facilitate the outflow of liquid.

[0011] As described above, the handheld stirring device has an annular groove along its outer periphery on the lower end cap, and the annular groove is fitted with an elastic element that can be interference-fitted with the inner wall of the storage cylinder.

[0012] As described above, the handheld stirring device includes an outer shell, which is fitted with an inner shell connected to the lower end cover. The inner shell is assembled by splicing a first side shell and a second side shell.

[0013] As described above, the handheld stirring device has a second snap-fit ​​portion on both sides of the upper part of the first side shell, and a second latch portion on both sides of the upper part of the second side shell corresponding to the second snap-fit ​​portion; a third snap-fit ​​portion on both sides of the lower part of the first side shell, and a third latch portion on both sides of the lower part of the second side shell corresponding to the third snap-fit ​​portion; wherein, one of the second latch portion and the third latch portion is an inward latch, and the other is an outward hook. Compared with the prior art, the present invention has the following advantages: 1. This utility model provides a detachable structure between the upper shell and the lower end cover, allowing users to easily separate the two for thorough cleaning of the equipment's interior, eliminating blind spots and ensuring hygienic use.

[0014] 2. The detachable design also facilitates the inspection and replacement of internal electrical or drive components, greatly improving the maintainability of the device, extending the product's service life, and avoiding resource waste caused by the scrapping of the entire machine due to partial damage. [Attached Image Description] To more clearly illustrate the technical solutions in the embodiments of the utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0015] Figure 1 This is a three-dimensional schematic diagram of Example 1; Figure 2 This is a front view of Example 1; Figure 3 This is a top view of Example 1; Figure 4 This is an exploded view of Example 1. Figure 1 ; Figure 5 This is an exploded view of Example 1. Figure 2 ; Figure 6 This is an exploded view of Example 1. Figure 3 ; Figure 7 for Figure 3 Sectional view along line AA; Figure 8 for Figure 7 Enlarged view of point B in the middle; Figure 9 This is a three-dimensional schematic diagram of the lower end cap in Example 1; Figure 10 This is an exploded view of the inner shell in Example 1. Figure 1 ; Figure 11 This is an exploded view of the inner shell in Example 1. Figure 2 ; Figure 12 This is a schematic diagram showing the fit between the lower end cap and the storage tube in Example 1; Figure 13 This is a three-dimensional schematic diagram of Example 2.

Detailed Implementation Methods

[0016] Example 1: This embodiment provides a handheld mixing device. Please refer to the attached document. Figures 1 to 12 This device includes an upper housing 1. An electrical component 2 for providing electrical power and a drive component 3 for providing stirring power are housed within the internal cavity of the upper housing 1. The electrical component 2 includes, but is not limited to, a battery, a switch, and a control circuit board. The drive component 3 includes a miniature DC motor. A lower end cover 4 is detachably provided at the bottom of the upper housing 1. The lower end cover 4 has a through hole in its center, allowing the rod of the stirring component 5 to pass through and connect with the output shaft of the drive component 3 for transmission.

[0017] The core of this embodiment lies in the detachable structure 6 between the lower end cover 4 and the upper shell 1. This design overcomes the technical shortcomings of existing products that use adhesive or integral molding for fixed connection, resulting in difficulties in cleaning and maintenance. By providing the detachable structure 6, users can easily separate the lower end cover 4 from the upper shell 1, thereby facilitating the cleaning of the connection between the stirring component 5 and the drive assembly 3, as well as any dirt that may be present inside the shell. It also greatly facilitates the maintenance or replacement of internal components. The detachable structure 6 can take various forms, such as a threaded connection, a snap-fit ​​structure, or a magnetic adsorption structure.

[0018] Further, as an optional implementation, the detachable structure 6 is a snap-fit ​​structure. This snap-fit ​​structure includes at least two first snap-fit ​​portions 61 and corresponding first latching portions 62. The first snap-fit ​​portions 61 and the first latching portions 62 are respectively disposed on the upper housing 1 and the lower end cover 4. Specifically, at least two first snap-fit ​​portions 61 can be disposed on the upper housing 1, and at least two first latching portions 62 can be disposed on the lower end cover 4; or vice versa, at least two first snap-fit ​​portions 61 can be disposed on the lower end cover 4, and at least two first latching portions 62 can be disposed on the upper housing 1. Both arrangements achieve the same snap-fit ​​function, and those skilled in the art can choose based on factors such as mold design, material properties, and ease of assembly.

[0019] Furthermore, to obtain a stable and uniform locking force, in this embodiment, at least two first snap-fit ​​parts 61 are evenly distributed along the upper circumference of the lower end cover 4, while at least two first latching parts 62 that cooperate with them are disposed at the bottom of the upper housing 1. During assembly, simply align the lower end cover 4 with the bottom of the upper housing 1 and press slightly to allow the evenly distributed snap-fit ​​points to be simultaneously stressed and locked, ensuring the reliability and concentricity of the connection and avoiding shaking or eccentricity problems that may be caused by single-point or asymmetrical connections.

[0020] Furthermore, as an optional implementation, to achieve a reliable and flexible locking effect, the first latching part 62 includes a latching groove 621 located on the bottom periphery of the upper housing 1, and an elastic latching arm 622 integrally extends from the latching groove 621 to cooperate with the first latching part 61. The elastic latching arm 622 utilizes the elasticity of its material (typically engineering plastics such as ABS or PC) to deform during installation, passing over the protrusion of the first latching part 61, and then springs back and locks in place, thereby achieving a secure lock.

[0021] Furthermore, as an optional implementation, to make the assembly process of the lower end cover 4 and the upper housing 1 smoother and more precise, and to improve the stability and tightness of the overall structure after assembly, a positioning mechanism 7 for limiting and guiding can be added between the two. The presence of this positioning mechanism 7 serves two purposes: firstly, it pre-defines the relative positions of the two components before the snap-fit ​​structure is fully locked, preventing users from repeatedly attempting alignment during installation and improving the user experience; secondly, after the snap-fit ​​is completed, the positioning mechanism 7 provides additional radial support, effectively resisting lateral forces and vibrations, significantly reducing the risk of loosening that may result from the fit clearance, and improving the long-term reliability of the product.

[0022] Specifically, the positioning mechanism 7 may consist of at least one positioning groove 71 provided on the inner wall of the lower end cover 4, and at least one positioning part 72 provided on the bottom periphery of the upper housing 1. The shape and number of the positioning part 72 correspond one-to-one with the positioning groove 71, and the two may be in a tight fit or a slight interference fit.

[0023] More specifically, the positioning part 72 can be a rectangular positioning rib extending axially along the bottom of the upper housing 1. Correspondingly, the positioning groove 71 is a rectangular recess formed on the inner wall of the lower end cover 4, which matches the size and shape of the rectangular positioning rib. During installation, the user only needs to align the rectangular positioning rib and slide it into the rectangular groove. Due to the excellent torsional resistance of the rectangular cross-section, the angular or circumferential position between the lower end cover 4 and the upper housing 1 is uniquely and precisely fixed. After installation, the sidewall of the positioning rib fits tightly against the inner wall of the positioning groove, forming a stable radial support. Together with the snap-fit ​​structure 6, this makes the entire connection structure more stable.

[0024] Of course, those skilled in the art will understand that the structure for achieving the above-mentioned positioning and reinforcement functions is not limited to this. It includes, but is not limited to, the following feasible solutions: As an alternative implementation, the cross-sectional shape of the positioning part 72 and the positioning groove 71 can also be other non-circular symmetrical shapes such as trapezoidal, semi-circular, V-shaped or spline-shaped, as long as the two can cooperate to achieve unique angular limiting and tight fit.

[0025] As an alternative implementation, the positioning mechanism 7 can also be composed of multiple positioning units. For example, two or more cylindrical positioning pins symmetrically distributed at the bottom of the upper housing 1 can be provided as positioning parts 72, and positioning holes for tight insertion can be provided on the inner wall of the lower end cover 4 as positioning grooves 71.

[0026] As an alternative implementation, the main mating interface between the upper housing 1 and the lower end cover 4 can also be designed as non-circular, such as elliptical or racetrack-shaped, using the shape of the interface itself to achieve circumferential positioning and lateral support. In this case, the non-circular interface itself acts as the positioning mechanism 7.

[0027] Furthermore, to further enhance the convenience and smoothness of assembly, as an optional implementation, a guide slope 43 is integrally formed on the inner edge of the opening at the upper end of the lower cover 4. When the upper housing 1 is installed toward the lower cover 4, even with slight positional deviations, the bottom edge of the upper housing 1 will first contact the guide slope 43. Under pressure, the slope naturally generates a center-converging guiding force on the upper housing 1, allowing it to smoothly and accurately enter the opening of the lower cover 4 until the positioning mechanism 7 and the snap-fit ​​structure 6 begin to function. The guide slope 43 provides a self-centering effect, greatly reducing assembly difficulty, avoiding the risk of jamming or component damage due to misalignment, and further optimizing the user experience.

[0028] Furthermore, as an optional implementation, the device also includes a storage cylinder 8 that mates with the lower end cap 4 to accommodate the stirring component 5. When the stirring device is not in use, the cleaned stirring component 5, along with the lower end cap 4, can be placed in the storage cylinder 8, providing dust protection. To address the issue of residual moisture in the stirring component 5 after cleaning not draining easily, the bottom of the storage cylinder 8 is also provided with at least one drain hole 81 to facilitate liquid outflow, ensuring hygienic storage.

[0029] More specifically, to ensure a stable fit between the storage tube 8 and the lower end cap 4, the lower end cap 4 has an annular groove 41 along its outer circumference, in which an elastic element 42 is embedded. The elastic element 42 can form an interference fit with the inner wall of the storage tube 8. When the storage tube 8 is placed on the lower end cap 4, the elastic element 42 will be slightly compressed. Utilizing the frictional force and radial support force generated therein, the storage tube 8 is firmly fixed to the lower end cap 4, preventing accidental detachment and facilitating easy disassembly. The elastic element 42 is preferably an O-ring made of silicone or rubber, which has good elasticity and durability.

[0030] Furthermore, as an optional implementation, the upper housing 1 includes an outer shell 11 and an inner shell 12 fitted inside the outer shell 11. The bottom of this inner shell 12 is actually connected to the lower end cover 4. Moreover, to facilitate the installation of the internal electrical components 2 and drive components 3, the inner shell 12 is not a one-piece structure, but is assembled by splicing together a first side shell 121 and a second side shell 122. This split inner shell design greatly simplifies the assembly process on the production line, improves production efficiency, and facilitates subsequent disassembly and maintenance.

[0031] Furthermore, the first side shell 121 has second locking portions 1211 on both upper sides and third locking portions 1212 on both lower sides. Correspondingly, the second side shell 122 has second latching portions 1221 on both upper sides corresponding to the second locking portions 1211, and third latching portions 1222 on both lower sides corresponding to the third locking portions 1212. This design with locking points on both the upper and lower sides ensures the structural stability after assembly.

[0032] It should be noted that, of the second buckle part 1221 and the third buckle part 1222, one is an inward buckle, while the other is an outward hook.

[0033] Specifically, in this embodiment, the upper connecting structure is an internal snap-fit ​​type. Its second snap-fit ​​portion 1211 is a snap-fit ​​hole formed on the side wall of the first side shell 121, while the second snap-fit ​​portion 1221 is an elastic snap-fit ​​arm integrally extended from the side wall of the second side shell 122. During assembly, the head of the elastic snap-fit ​​arm undergoes elastic deformation, precisely snapping into the snap-fit ​​hole and returning to its original shape, thereby achieving a tight fit. This internal snap-fit ​​structure primarily provides precise radial positioning, preventing left-right misalignment or shear deformation of the two half-shells after splicing.

[0034] The lower connecting structure is an externally clasping type. Its third locking part 1212 is a ribbed locking groove located on the outer wall of the first side shell 121, while the third latching part 1222 is an elastic hook with a C-shaped or L-shaped cross-section extending from the bottom of the second side shell 122. During assembly, the elastic hook tightly hooks onto the rib in the locking groove from the outside in a wrapping manner. This externally clasping hook structure can withstand very strong axial tensile forces, effectively preventing the two half-shells from being accidentally pried open or pulled apart when subjected to the thrust of internal components or the tension of external forces.

[0035] By combining the two different mechanical principles of the above-mentioned buckle, the assembled inner shell achieves an optimal balance in terms of structural strength and positioning accuracy, which can cope with the complex stress generated during stirring and ensure the durability and reliability of the product.

[0036] Example 2: This embodiment provides a handheld milk frother kit. Please refer to the attached drawings for details. Figures 1 to 13 The kit includes the handheld stirring device proposed in Example 1 and a matching stirring container 9. Therefore, this handheld milk frother kit, as a whole, naturally possesses all the beneficial effects detailed in Example 1. Based on this, this embodiment specifies the application scenario of the stirring element 5. The stirring element 5 is specifically designed as a frothing head for milk foaming. This frothing head includes a slender stirring rod, the end of which is connected to a spring-loaded stirring head made of stainless steel wire with a suitable density. When rotating at high speed, this spring-loaded stirring head can efficiently agitate air into the liquid, forming dense and fine milk foam in a short time.

[0037] The stirring container 9 can be a measuring cup or mug, its volume and depth adapted to the size of the stirring device, facilitating the user's stirring and foaming of milk. When not in use, the user can place the stirring device upright in the container. This design not only solves the storage problem when the device is not in use, making the desktop tidier, but more importantly, when the user places the cleaned stirring device along with its storage tube into the stirring container, residual water draining from the drain hole 81 of the storage tube is directly collected in the stirring container, preventing liquid from flowing onto the desktop or other structural surfaces, thus combining convenience and hygiene.

[0038] Working principle and application of this utility model: The working principle and usage process of this utility model are as follows: During assembly, align the bottom of the upper housing 1 with the opening of the lower end cover 4. With the help of the guide ramp on the inner edge of the lower end cover 4, the upper housing 1 can be easily guided into the correct position. Then, the user aligns the positioning part 72 at the bottom of the upper housing 1 with and inserts it into the positioning groove 71 on the inner wall of the lower end cover 4, thus securing their circumferential positions. Finally, with a slight press, the first snap-fit ​​part 62 at the bottom of the upper housing 1 will elastically engage with the first snap-fit ​​part 61 on the upper part of the lower end cover 4, thereby completing the quick and precise assembly of the entire device.

[0039] In daily use, the user can operate the electrical component 2, for example, by pressing a switch, and the drive component 3 will drive the stirring component 5 to rotate at high speed to achieve stirring, foaming or mixing of liquid.

[0040] After use and cleaning, the user can securely mount the storage tube 8 to the bottom of the device via an interference fit between it and the elastic element 42 between the storage tube 8 and the lower end cap 4. Then, the entire device can be stored upright in the matching mixing container. Any moisture remaining inside the mixing element 5 and the storage tube 8 after cleaning will naturally drain out through the drain hole 81 at the bottom of the storage tube 8 and be collected by the mixing container below, thus ensuring hygienic storage and a clean work surface.

[0041] It should be noted that the above-described embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Those skilled in the art should understand that the structural innovation of the handheld mixing device described in Embodiment 1 has wide applicability. Its protection is not limited to its use as a milk frother; by replacing the mixing element 5 with different functional forms, it can also be specifically used as a handheld egg beater, a portable mixer for mixing protein powder or infant formula, etc. Therefore, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A handheld stirring device, comprising an upper housing (1), wherein an electrical assembly (2) and a drive assembly (3) are disposed within the upper housing (1), and a lower end cover (4) is provided at the bottom of the upper housing (1), the lower end cover (4) for inserting a stirring component (5) into and connecting with the drive assembly (3), characterized in that, A detachable structure (6) is provided between the lower end cover (4) and the upper housing (1).

2. The handheld stirring device according to claim 1, characterized in that, The detachable structure (6) is a snap-fit ​​structure, which includes at least two first snap-fit ​​parts (61) and corresponding first latching parts (62). At least two first snap-fit ​​parts (61) are disposed on one of the upper housing (1) or the lower end cover (4), and at least two first latching parts (62) are disposed on the other one.

3. The handheld stirring device according to claim 2, characterized in that, At least two of the first snap-fit ​​portions (61) are evenly distributed along the upper circumference of the lower end cover (4), and at least two of the first snap-fit ​​portions (62) are provided at the bottom of the upper housing (1).

4. The handheld stirring device according to claim 3, characterized in that, The first latching part (62) includes a latching groove (621) provided on the bottom periphery of the upper housing (1), and an elastic latching arm (622) that cooperates with the first latching part (61) extends from the latching groove (621).

5. The handheld stirring device according to claim 1, characterized in that, A positioning mechanism (7) for limiting and guiding is also provided between the lower end cover (4) and the upper housing (1).

6. The handheld stirring device according to claim 5, characterized in that, The positioning mechanism (7) has at least one positioning groove (71) on the inner wall of the lower end cover (4) and at least one positioning part (72) on the bottom periphery of the upper housing (1), and the positioning part (72) corresponds to the positioning groove (71) one by one.

7. The handheld stirring device according to claim 1, characterized in that, It also includes a receiving tube (8) that can cooperate with the lower end cap (4) to accommodate the stirring element (5), and the bottom of the receiving tube (8) is provided with at least one drain hole (81) to facilitate the outflow of liquid.

8. The handheld stirring device according to claim 7, characterized in that, The lower end cap (4) has an annular groove (41) along its outer periphery, and the annular groove (41) is fitted with an elastic element (42) that can be interference-fitted with the inner wall of the storage tube (8).

9. The handheld stirring device according to claim 3, characterized in that, The upper housing (1) includes an outer shell (11), and the outer shell (11) is fitted with an inner shell (12) connected to the lower end cover (4). The inner shell (12) is assembled by splicing a first side shell (121) and a second side shell (122).

10. The handheld stirring device according to claim 9, characterized in that, The first side shell (121) has a second snap-fit ​​portion (1211) on both sides of its upper part, and the second side shell (122) has a second buckle portion (1221) on both sides of its upper part corresponding to the second snap-fit ​​portion (1211); the first side shell (121) has a third snap-fit ​​portion (1212) on both sides of its lower part, and the second side shell (122) has a third buckle portion (1222) on both sides of its lower part corresponding to the third snap-fit ​​portion (1212); wherein, one of the second buckle portion (1221) and the third buckle portion (1222) is an inward buckle, and the other is an outward hook.

Images