Stirring head protective cover with boss extending outwards and stirring rod

Abstract

The embodiment of the utility model provides a stirring head protective cover with a boss extending outwards and a stirring rod. The stirring head protective cover with the bosses extending outwards comprises a cover body with the bottom open and hollow, the bosses protrude outwards on the side wall of the cover body, a cavity is formed in the side, close to an inner cavity of the cover body, of each boss, the cavity is communicated with the inner cavity of the cover body, a plurality of notch grooves are formed in the bottom of the side wall of the cover body, and the bosses extend outwards from the notch grooves. The notch groove is located at the position, away from the boss, of the bottom of the side wall of the cover body. The boss is arranged on the side wall of the cover body in an outward protruding mode, the internal space of the cover body can be increased, the rotating speed of liquid in the cover body can be reduced easily in the using process, a relatively longer blade can be used in the cover body, and powerful eddy current can be generated easily. Therefore, the contact frequency of food materials and the blades can be improved during use, and finally the stirring efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen appliances, and in particular relates to a stirring head protective cover and a stirring rod with an outwardly extending boss. Background Art

[0002] When the main unit of the handheld blender is connected to the stirring rod and the main unit is turned on, the stirring rod can achieve the purpose of crushing the ingredients in the container. The movement effect of the stirring rod in the container and the strength of the vortex generated by the blade cover in the container have a great influence on the stirring effect.

[0003] If the suction of the stirring rod is small, it can be moved easily and freely in the container, and the stirring effect is better; on the contrary, if the suction of the stirring rod is large, the stirring rod will easily stick to the container. At this time, the amount of food entering the blade cover (including large particles, small particles, and fine foam components) will be greatly reduced, and the stirring efficiency (at this time, the blade has almost no food to stir) will also decrease.

[0004] The suction force of appropriate size solves the problem of difficulty in moving the stirring rod, but the vortex of the liquid cannot roll, and the stirring effect is still difficult to guarantee. If the vortex rolling is strong, the ingredients around the knife cover can be attracted to the knife cover, and the stirring efficiency will be high.

[0005] The operating principle of a handheld blender is a practical application of Bernoulli's principle. The high-speed rotation of the blade drives the surrounding liquid (primarily within the blade cover) to rotate in tandem. The liquid within the blade cover rotates at a higher speed than the liquid outside the blade cover, especially in the middle and upper parts of the container. This creates a pressure difference between the upper and lower parts of the water in the container, with higher pressure at the top and lower pressure at the bottom. As a result, the liquid in the container forms a top-down convection current, enabling the blender's stirring function. After the motor power and blade are determined, the operating mode and stirring efficiency of the liquid in the container are closely linked to the structural characteristics of the blade cover. Therefore, improving the blade cover's structural characteristics can improve the two main performance characteristics of a handheld blender: stirring efficiency and user experience.

[0006] Patent publication number CN211632940U discloses a stirring head protective cover and stirring rod with extended ridges on the inner wall of the cover. It includes a hollow protective cover with an open bottom and a connecting column fixed on the hollow protective cover. The hollow protective cover is evenly provided with at least two raised extended ridges along the inner wall, and the bottom of the extended ridges is provided with an arc-shaped opening; the inner wall of the cover is provided with an inwardly concave groove extending axially inward. The cover body with the same outer diameter will compress the space inside the knife cover by 10 to 20 mm in the inner diameter direction due to its concave surface structure, thereby reducing the flow rate of the upward and downward convection of the liquid, thereby reducing the convection speed and ultimately reducing the stirring effect. Utility Model Content

[0007] In view of the above-mentioned problems existing in the prior art, an object of the embodiments of the present invention is to provide a stirring head protective cover and a stirring rod having an outwardly extending boss.

[0008] The technical solution adopted in the embodiment of the present utility model is a stirring head protective cover with an outwardly extending boss, including a hollow cover body with an open bottom, a plurality of bosses protruding outward on the side wall of the cover body, a cavity formed on the side of the boss close to the inner cavity of the cover body, and the cavity is connected to the inner cavity of the cover body, and a plurality of notches are constructed at the bottom of the side wall of the cover body, and the notches are located at a position at the bottom of the side wall of the cover body avoiding the bosses. The bosses protruding outward on the side wall of the cover body can increase the internal space of the cover body, which helps to reduce the rotation speed of the liquid in the cover body during use, and can use a relatively longer blade inside it, which helps to generate a strong vortex. Therefore, the contact frequency between the food and the blade can be increased during use, and the mixing efficiency is ultimately improved.

[0009] Furthermore, the boss is a shell-shaped protrusion extending outward in the axial direction on the side wall of the cover. According to Bernoulli's principle, an independent boss extending outward in the axial direction is designed on the side wall of the cover.

[0010] Furthermore, the bottom of the boss is flush with the bottom of the cover, and the bottom edge of the boss is constructed as a part of the bottom edge of the cover. The line connecting the bottom edge of the boss and the bottom edge of the cover forms a petal-shaped overall form.

[0011] Furthermore, a lateral inclination angle α of the boss on the side wall surface of the cover body is 90°±40°, and an axial inclination angle β of the boss on the side wall surface of the cover body is 20°±20°.

[0012] Furthermore, a transverse inclination angle α of the boss on the side wall surface of the cover body is 90°, and an axial inclination angle β of the boss on the side wall surface of the cover body is 20°.

[0013] Furthermore, the height h1 of the boss is 0.2 to 0.8 times the height H of the cover body; the thickness t of the boss is 0.04 to 0.2 times the height H of the cover body; and the width L1 of the boss is 0.2 to 0.6 times the height H of the cover body.

[0014] Furthermore, the height h1 of the boss is 30 mm; the thickness t of the boss is 5 mm; and the width L1 of the boss is 20 mm.

[0015] Furthermore, the width L2 of the notch is 0.2 to 0.5 times the height H of the cover body; and the height h2 of the notch is 0.1 to 0.4 times the height H of the cover body.

[0016] Furthermore, the width L2 of the notch groove is 18 mm; the height h2 of the notch groove is 10 mm.

[0017] Furthermore, the width of the notch groove is 18 mm; the height of the notch groove is 10 mm.

[0018] A stirring rod is equipped with a stirring head protective cover having an outwardly extending boss as described above. The boss causes the liquid that originally flowed smoothly along the conical or cylindrical wall of the cover to suddenly change direction, thereby causing the difference in flow rate between the liquid inside and outside the cover to change. As a result, the pressure difference between the inside and outside of the cover decreases, thereby reducing the suction force of the stirring rod during operation. At the same time, the relatively larger inner diameter of the cover allows the use of a relatively longer blade, ensuring the required vortex strength.

[0019] Compared with the existing technology, this technical solution designs an independent axially outward extending boss on the cover body, which can disturb the liquid during use, reduce the liquid rotation speed, increase the blade cutting frequency, and ultimately improve the stirring efficiency.

[0020] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention.

[0021] The overview of various implementations or examples of the technology described in this utility model is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar components. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and claims, serve to illustrate the embodiments of the utility model. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0023] Figure 1 It is a structural schematic diagram of an embodiment of the present utility model.

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of an embodiment of the present utility model.

[0025] Figure 3 Schematic diagram of the lateral inclination angle α of the boss on the side wall surface of the cover body.

[0026] Figure 4 This is a schematic diagram of an angle in which the lateral inclination angle α of the boss on the side wall surface of the cover body is 80°.

[0027] Figure 5 Parameter marking diagram for boss and notch Figure 1 .

[0028] Figure 6 Parameter marking diagram for boss and notch Figure 2 .

[0029] Figure 7 This is a schematic diagram of an embodiment of a triangular boss of the present invention.

[0030] Figure 8 This is a schematic diagram of an embodiment of a square boss of the present invention.

[0031] Figure 9 This is a variable relationship diagram between the boss height and the suction force of the cover.

[0032] Figure 10 This is a variable relationship diagram between the boss width and the suction force of the cover.

[0033] Figure 11 This is a variable relationship diagram between the boss thickness and the suction force of the cover.

[0034] Figure 12 This is a variable relationship diagram between the notch width and the suction force of the cover body.

[0035] Figure 13 This is a variable relationship diagram between the notch width and height and the suction force of the cover. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0038] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0039] See Figures 1 to 13 The embodiment of the utility model provides a stirring head protective cover with an outwardly extending boss, comprising a hollow cover body 1 with an open bottom, a plurality of bosses 2 protruding outward on the side wall of the cover body 1, the side of the boss 2 close to the inner cavity of the cover body 1 is constructed as a cavity, and the cavity is connected to the inner cavity of the cover body 1, and a plurality of notches 3 are constructed at the bottom of the side wall of the cover body 1, and the notches 3 are located at a position at the bottom of the side wall of the cover body 1 avoiding the boss 2. The boss 2 protruding outward on the side wall of the cover body 1 can increase the internal space of the cover body 1, which helps to reduce the liquid rotation speed in the cover body 1 when in use, and can use a relatively longer blade inside it, which helps to generate a strong vortex. The technical solution designs an independent axially outwardly extending boss 2 on the cover body 1, which can play a turbulent role on the liquid when in use, reduce the liquid rotation speed, increase the blade cutting frequency, and ultimately improve the stirring efficiency.

[0040] The boss 2 is a shell-like protrusion extending axially outward from the sidewall of the housing 1. Based on Bernoulli's principle, the boss 2 is designed as an independent, axially outward-extending protrusion on the sidewall of the housing 1. The bottom of the boss 2 is flush with the bottom of the housing 1, and the bottom edge of the boss 2 is constructed as a portion of the bottom edge of the housing 1. The line connecting the bottom edges of the boss 2 and the housing 1 forms a petal-shaped overall shape.

[0041] A stirring rod is installed with a stirring head protective cover having an outwardly extending boss as described above. The appearance of the boss 2 causes the liquid that originally flowed smoothly on the conical or cylindrical wall surface of the cover body 1 to suddenly change direction, thereby causing a change in the difference in flow velocity between the liquid inside and outside the cover body 1. As a result, the pressure difference between the inside and outside of the cover body 1 is ultimately reduced, thereby reducing the suction force of the stirring rod during operation. At the same time, the relatively larger inner diameter of the cover body 1 allows the use of relatively longer blades, which can ensure the strength requirements of the eddy current.

[0042] This technical solution improves the stirring efficiency by increasing the contact frequency between the food ingredients and the blade: under the condition that the motor speed remains unchanged (at this time, the blade speed remains unchanged), the liquid speed inside the cover body 1 is reduced through a certain structural design of the cover body 1. To ensure that the length of the blade (too short cannot generate a strong eddy current) meets the requirements, that is, the inner diameter of the protective cover cannot be too small. Therefore, a boss 2 is protrudingly constructed on the side wall of the cover body 1. The lateral inclination angle α of the boss 2 on the outer wall of the cover body 1 is 90° ± 40° (the best is 90°), and the axial inclination angle β of the boss 2 on the outer wall of the cover body 1 is 20° ± iew1d20° (the best is 20°). The contour cross-sectional characteristics of the boss 2 can be circular, triangular, square, etc. The boss 2 can act as a flow disturbing effect on the liquid, reduce the liquid speed, increase the cutting frequency of the blade, and ultimately improve the stirring efficiency.

[0043] 2. Improve the user experience:

[0044] During use, it is required that the stirring rod can move freely and effortlessly up, down, left, and right in the container. However, the current structure of the knife cover protective cover generally cannot achieve this free movement operation effect well when the stirring rod touches the bottom of the container due to too large suction force. Some stirring rods are difficult to separate or cannot be separated at all once the knife cover protective cover touches the bottom of the container during use. Some stirring rods with smaller suction forces have grooves that are axially recessed inward, resulting in insufficient internal space in the knife cover and difficulty in forming a strong eddy current. Especially when stirring cooked food in a large basin, when the outer diameter of the knife cover is slightly larger and the stirring rod is tilted, and the user is used to leaning the rod against the edge of the basin during use, the stirring is likely to fail because part of the head of the knife cover is easily exposed above the liquid surface and the eddy current disappears.

[0045] Test data shows that: [[ID=**13**]] [[ID=**14**]]

[0046] [[ID=**15**]]When the suction force value of the cover body 1 is 15N < F suction < 20N, the operation is very fatiguing. Once the bottom of the cover body 1 fits with the container, it can be manually separated with great force (at this time, the main machine does not stop), but the liquid is likely to splash out of the container along with the stirring rod, and the user experience becomes worse; [[ID=**16**]] [[ID=**17**]]

[0047] When the suction value F of the cover 1 is greater than 25N, it is almost impossible to manually separate the cover 1 from the container. At this time, if you want to separate the two, you can only shut down the main unit first, that is, stop the machine halfway through the mixing process. If you continue to mix without stopping the machine, large pieces of food cannot enter the protective cover, resulting in low mixing efficiency and poor mixing effect.

[0048] For this purpose, see Figures 3 to 6 The lateral inclination angle α of the boss 2 on the side wall surface of the cover body 1 is 90°±40°, and the axial inclination angle β of the boss 2 on the side wall surface of the cover body 1 is 20°±20°. Optimally, the lateral inclination angle α of the boss 2 on the side wall surface of the cover body 1 is 90°, and the axial inclination angle β of the boss 2 on the side wall surface of the cover body 1 is 20°. Figure 5 The height h1 of the boss 2 is 0.2 to 0.8 times the height H of the cover body 1; the thickness t of the boss 2 is 0.04 to 0.2 times the height H of the cover body 1; the width L1 of the boss 2 is 0.2 to 0.6 times the height H of the cover body 1. Figures 9 to 11 Optimally, the height h1 of the boss 2 is 30 mm; the thickness t of the boss 2 is 5 mm; and the width L1 of the boss 2 is 20 mm.

[0049] The boss 1 reduces the suction force of the stirring rod during operation (the presence of the boss 1 causes the liquid that was originally flowing smoothly on the inner wall of the cover 1 to suddenly change direction, causing the difference in flow rate between the liquid inside and outside the blade cover to change, resulting in a smaller pressure difference inside and outside the blade cover). At the same time, the inner diameter of the cover 1 is suitable for longer blades to ensure the required vortex strength. In addition, to ensure smooth convection of the liquid inside and outside the cover 1 (to ensure that the food enters the blade stirring area inside the protective cover in a timely and stable manner when the cover 1 is attached to the bottom of the container), a number of notches 3 are constructed on the bottom of the side wall of the cover 1, avoiding the boss 2. Figure 5 The width L2 of the notch 3 is 0.2 to 0.5 times the height H of the cover body 1; the height h2 of the notch 3 is 0.1 to 0.4 times the height H of the cover body 1. Figures 12 to 13 Optimally, the width L2 of the notch groove 3 is 18 mm; the height h2 of the notch groove 3 is 10 mm.

[0050] The above description is intended to be illustrative rather than restrictive, and those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure. Furthermore, the above examples (or one or more of them) may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. A stirring head protective cover with an outwardly extending boss, comprising a cover body (1) with an open bottom and a hollow interior, characterized in that: A plurality of bosses (2) are formed on the side wall of the cover body (1) so as to protrude outwards, a side of the bosses (2) close to the inner cavity of the cover body (1) is formed as a cavity, and the cavity is communicated with the inner cavity of the cover body (1), and a plurality of notches (3) are formed on the bottom of the side wall of the cover body (1), and the notches (3) are located at a position of the bottom of the side wall of the cover body (1) away from the bosses (2).

2. The stirring head protective cover with an outwardly extending boss according to claim 1, characterized in that: The boss (2) is a shell-shaped protrusion on the side wall of the cover body (1) extending outward in the axial direction.

3. The stirring head protective cover with an outwardly extending boss according to claim 1, characterized in that: The bottom of the boss (2) is flush with the bottom of the cover body (1), and the bottom edge of the boss (2) is constructed as a part of the bottom edge of the cover body (1).

4. The stirring head protective cover with an outwardly extending boss according to claim 1, characterized in that: The lateral inclination angle α of the boss (2) on the side wall surface of the cover body (1) is 90°±40°, and the axial inclination angle β of the boss (2) on the side wall surface of the cover body (1) is 20°±20°.

5. The stirring head protective cover with an outwardly extending boss according to claim 4, characterized in that: The lateral inclination angle α of the boss (2) on the side wall surface of the cover body (1) is 90°, and the axial inclination angle β of the boss (2) on the side wall surface of the cover body (1) is 20°.

6. The stirring head protective cover with an outwardly extending boss according to claim 1, characterized in that: The height h1 of the boss (2) is 0.2 to 0.8 times the height H of the cover body (1); the thickness t of the boss (2) is 0.04 to 0.2 times the height H of the cover body (1); and the width L1 of the boss (2) is 0.2 to 0.6 times the height H of the cover body (1).

7. The stirring head protective cover with an outwardly extending boss according to claim 6, characterized in that: The height h1 of the boss (2) is 30 mm; the thickness t of the boss (2) is 5 mm; and the width L1 of the boss (2) is 20 mm.

8. The stirring head protective cover with an outwardly extending boss according to claim 1, characterized in that: The width L2 of the notch groove (3) is 0.2 to 0.5 times the height H of the cover body (1); and the height h2 of the notch groove (3) is 0.1 to 0.4 times the height H of the cover body (1).

9. The stirring head protective cover with an outwardly extending boss according to claim 1, characterized in that: The width L2 of the notch groove (3) is 18 mm; the height h2 of the notch groove (3) is 10 mm.

10. A stirring rod, characterized in that: A stirring head protective cover with an outwardly extending boss as described in any one of claims 1 to 9 is installed.

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