WO2020116919A1

WO2020116919A1 - Rotational blade for grinding or mixing, assembly thereof and assembly for adjusting internal volume of receptacle

Info

Publication number: WO2020116919A1
Application number: PCT/KR2019/016973
Authority: WO
Inventors: 변상섭
Original assignee: 변상섭
Priority date: 2018-12-04
Filing date: 2019-12-04
Publication date: 2020-06-11

Abstract

The present invention relates to a rotational blade for grinding or mixing, used especially in a blender, an assembly thereof and an assembly for adjusting the internal volume of a receptacle, and relates to: a rotational blade comprising a plurality of blades and rotating around a rotational shaft when in use; an assembly thereof; and an assembly for adjusting the internal volume of a receptacle, the assembly comprising additional configurations.

Description

Rotary knife for grinding or mixing, its assembly and volume control assembly inside the container

The present invention relates to a rotary knife and its assembly, and more particularly to a rotary knife for grinding or mixing used in a blender and its assembly.

In addition, the present invention relates to an interior volume control assembly for a container, and to an assembly for changing and adjusting the interior volume, which is the receiving space of the container.

Cooking utensils, commonly called blenders or blenders, are widely used to crush or mix objects such as ingredients.

The blender has a container for receiving an object that needs to be crushed or mixed, and a rotary knife that can be selectively rotated by a motor or the like is installed at the bottom of the container. As the rotary knife rotates at a high speed, on average, it rotates along the rotational direction of the rotary knife, and the centrifugal force causes the container to have a relatively high water level and a relatively low cross-sectional profile on the rotary axis of the rotary knife. Complex vortices and turbulence are formed inside the object, and bubbles are also mixed.

When bubbles are mixed in this way, the oxidation of the object may be promoted, and excessive vortex or turbulence formation may decrease the efficiency of pulverization or mixing and increase noise or vibration.

On the other hand, the container for accommodating food and the like has a fixed size, so a plurality of containers of different sizes must be provided in order to properly accommodate various amounts of food.

Cooking utensils, commonly referred to as blenders or blenders, are widely used to crush or mix objects such as ingredients. The blender is provided with a container for receiving an object that needs to be crushed or mixed, and it is not easy to have a plurality of these containers, so it is necessary to use a given internal volume as it is. On the other hand, the bottom of the container is provided with a rotary knife that can be selectively rotated by power such as a motor. As the rotary knife rotates at a high speed, on average, it rotates along the rotational direction of the rotary knife, and the centrifugal force causes the container to have a relatively high water level and a relatively low cross-sectional profile on the rotary axis of the rotary knife. Complex vortices and turbulence are formed inside the object, and bubbles are also mixed.

When bubbles are mixed in this way, the oxidation of the object may be promoted, and excessive vortex or turbulence formation may decrease the efficiency of pulverization or mixing and increase noise or vibration. In addition, while the object is pulverized or mixed, the upper half of the container does not directly contribute to crushing or mixing, and thus becomes a wasted space. Rather, the scattered object is attached to the container wall, which may be a factor that inhibits the crushing or mixing of the object.

An empty space that is not utilized even in a container that simply stores an object may adversely affect the object through an action such as oxidation.

The present invention has been made to solve the above-mentioned problems, and aims to provide a rotary knife and its assembly capable of increasing the efficiency of grinding or mixing and reducing noise and vibration.

Another object of the present invention is to provide a rotary knife and its assembly capable of minimizing the oxidation of an object by minimizing contact between the object and air.

Other objects, specific advantages and novel features of the present invention will become more apparent from the following detailed description and preferred embodiments associated with the accompanying drawings.

In addition, the present invention has been devised to solve the above another problem, and increases the efficiency of storage, crushing, or mixing, and can control the internal volume of the container to minimize the attachment of the object to the container wall. It is an object to provide an adjustment assembly.

Another object of the present invention is to provide a volume control assembly inside a container that can minimize contact of air with an object and minimize bubble mixing.

In order to achieve the above object, the rotary knife according to the present invention includes a plurality of knives and is a rotary knife that rotates around a rotational axis when used, wherein at least one of the plurality of knives is a tip portion with respect to the rotational direction of the rotary knife The blade angle in the cross section perpendicular to the cutting edge of may increase as the distance from the rotation axis increases.

In the rotary knife according to the present invention, at least one of the plurality of knives may be shorter as the length of the blade surface in the cross section perpendicular to the cutting edge is further away from the rotation axis. In addition, at least one of the plurality of knives may form a curve in which the cutting edge is concave. Meanwhile, at least one of the plurality of knives may further include a plate-shaped rear end wing extending from a rear end portion with respect to the rotational direction of the rotating knife and oriented to induce an upward flow to the object to be crushed or mixed. Further, at least one of the plurality of knives may further include a plate-shaped end blade extending upward from the blade end, which is an end portion far from the rotation axis. In addition, at least one of the plurality of knives is bent at least twice in the radial direction from the rotation axis, and a portion farthest from the rotation axis may be oriented to induce upward flow to the object to be crushed or mixed.

The rotary knife assembly according to the present invention includes a first rotary knife and a second rotary knife, each of which includes a plurality of knives and rotates about a rotation axis when used, wherein the first rotary knife and the second rotary knife have the same rotary axis The second rotary knife is installed on the upper side of the first rotary knife, and at least one of the plurality of knives of the first rotary knife is perpendicular to the cutting edge of the tip of the rotary knife. The blade angle in cross section is above

The further away from the axis of rotation, at least one of the plurality of knives of the second axis of rotation is bent at least twice in the radial direction from the axis of rotation, and the part farthest from the axis of rotation provides upward flow to the object to be crushed or mixed. It can be oriented to induce.

In the rotary knife assembly according to the present invention, at least one of the plurality of knives of the second rotary knife bent at least twice, the radial size is smaller than the radial size of each of the plurality of knives of the first rotary knife. Can be. In addition, at least one of the plurality of knives of the first rotary knife may further include a plate-shaped end blade extending upward from the blade end, which is an end far from the rotation axis.

In addition, in order to achieve the above another object, the container interior volume control assembly according to the present invention includes a lid detachable to seal an upper surface of a container for accommodating, crushing or mixing objects, and an inner space of the container It may include a disk-shaped partition plate arranged to divide in the vertical direction, and an operation unit for moving the partition plate up and down with respect to the lid.

In the interior volume control assembly of the container according to the present invention, the operation unit, a manual air pump installed on the lid, and is installed between the lid and the partition plate and has an internal space sealed to the outside and can be stretched vertically. It includes a corrugated tube, and the manual air pump can inject air into the corrugated tube inner space during operation. Here, the lid and the partition plate may further include an elastic member that exerts an elastic force in a direction close to each other. Also, when the manual air pump is operated, it may be operated to supply air outside the container to the corrugated tube, or when the manual air pump is operated, to supply air inside the container to the corrugated tube.

In addition, in the volume control assembly inside the container according to the present invention, the relief valve for selectively discharging the air inside the corrugated tube to the outside may be further included.

The container interior volume control assembly according to the present invention may further include a lip seal installed along the edge of the partition plate or an inflatable O-ring installed along the edge of the partition plate.

According to the present invention, ascending flow is strengthened from the outside in the radial direction by the change of the blade angle along the radial direction, and it is possible to minimize imbalance due to the difference in linear speed of each part of the knife along the radial direction. In addition, by inducing the flow of the object through the concave cutting edge and the blade surface in the direction toward the rotation axis, it is possible to suppress the phenomenon that the object is only driven outward in the radial direction. Furthermore, the cross-sectional profile of the object can be changed by allowing the knife which is bent two or more times of the rotating knife to form an upward flow.

The rotary knife assembly according to the present invention includes a first rotary knife and a second rotary knife, but the knife bent two or more times of the second rotary knife forms an upward flow and is located inside the first rotary knife and is also located inside the object. You can change the cross-sectional profile.

In addition, according to the present invention, since the partition plate divides the interior of the container into two spaces, the space that does not contribute to storage, crushing, or mixing can be separated, thereby minimizing the effect of the empty space on the object and improving space utilization. , In the case of a blender container, it is also possible to suppress the object from adhering to the container wall. In addition, since the space in which the storage, crushing, or mixing is made can be reduced according to the object, the storage, crushing, or mixing efficiency is improved. At this time, since the vertical position of the dividing plate can be adjusted, the height of the dividing plate can be easily adjusted according to the amount of the object.

In addition, since the air pressure inside the container can be selectively increased or decreased, it is possible to control the incorporation of air into the object.

1 is a perspective view of an embodiment of a rotary knife according to the present invention.

2 is a front view of the embodiment of FIG. 1.

3 is a plan view of the embodiment of FIG. 1.

4 is a cross-sectional view taken along line A-A of FIG. 3.

5 is a cross-sectional view taken along line B-B of FIG. 3.

6 is a plan view of another embodiment of a rotary knife according to the present invention.

7 is a front view of the embodiment of FIG. 6.

8 is a plan view of one embodiment of a rotary knife assembly according to the present invention.

9 is a front view of the embodiment of FIG. 8.

10 is a front view in one operating state of an embodiment of the container interior volume control assembly according to the present invention.

11 is a front view in another operating state of the embodiment of FIG. 10.

12 is a cross-sectional view of the operating state of FIG. 11.

13 is an enlarged view of part C of FIG. 12.

14 is a corresponding enlarged view of FIG. 13 of another embodiment of a container interior volume control assembly according to the present invention.

Hereinafter, preferred embodiments of the rotary knife, the rotary knife assembly, and the interior volume control assembly of the container according to the present invention will be described in detail with reference to the accompanying drawings. In the description, the division of the vertical direction is an example based on a rotary knife rotated around a vertical axis of rotation from the bottom to the container in a conventional blender, and is not applied until the rotary knife is used in a different posture or position. In addition, in the description, the division of the vertical direction is an example based on a rotary knife rotated around a rotation axis perpendicular to the bottom of the container in a conventional blender.

1 to 3 are a perspective view, a front view, and a plan view of an embodiment of a rotary knife according to the present invention, respectively.

The rotary knife includes four knives 100, and these knives 100 are referred to as having a blade as a portion extending radially from the rotary shaft 50 of the rotary knife, which is illustrated here only in the form of a hole. In an actual use state, a shaft driven by an electric motor or the like is inserted into and fixed to the hole-shaped rotating shaft 50. The rotary knife illustrated in FIG. 1 includes four knives 100, but the number of knives included in the rotary knife is not limited to four, but may be two or more, and there is no particular limitation on the number. The plurality of knives are preferably arranged in a rotationally symmetrical or point-symmetrical form so that no vibration or noise occurs during rotation of the rotary knife. Each knife 100 is similar in individual shape, but as shown in the front view of FIG. 2, the arrangement angle may be different. For example, the two opposing knives may be disposed to be bent upwards and the other two opposing knives may be disposed to bend downwards. The arrangement angle can be changed as needed.

Each knife 100 is operated to rotate in the rotational direction indicated by the arrow in FIG. 3 around the rotating shaft 50, wherein the blade, that is, the cutting edge, is cut at the tip portion 100a that first comes into contact with the object to be crushed or mixed. Is formed to mainly crush the object.

The cross-sectional shape in the plane transverse to this cutting edge can be confirmed through FIG. 4 which is a sectional view along the cutting line A-A in FIG. 3 and FIG. 5 which is a sectional view along the cutting line B-B in FIG. 3. The cutting line AA corresponds to a portion of the cutting edge that is relatively close to the axis of rotation. Compared to the cutting line BB, which is a portion of the cutting edge that is relatively far from the axis of rotation, the angle on the cross section of the cutting edge, that is, the blade angle is α in the section along the cutting line AA. It can be seen that in the cross section along the cutting line BB, it has a relationship of α<β as β. That is, FIGS. 4 and 5 show that the blade angle gradually increases from the rotation axis to the radially outward direction in each knife 100. By dividing the relative velocity of the cutting edge of the grinding or mixing object flowing on the cutting edge into the horizontal component and the vertical component, the horizontal component decreases as it moves away from the axis of rotation, and the vertical component increases as it moves away from the axis of rotation. You can see that When the steel knife 100 rotates around the rotational axis, the angular velocity is constant, but the linear velocity in the tangential direction at each part away from the rotational axis along the radial direction increases as it moves away from the rotational axis, as described above. The change in blade angle, which increases with increasing quality, leads to a horizontal component of the velocity of the object that decreases as it moves away from the axis of rotation, which offsets the change in the tangential velocity of each part of the knife that increases as it moves away from the axis of rotation. Can have That is, when viewed as a horizontal component, it is possible to make the distribution of the relative speed of the object along the radial direction of the knife more uniform, and through this, when the main chain or mixing is performed, that is, when the blender is operated, it rises along the radial direction from the rotating shaft. One side can also change the cross-sectional profile of the object.

4 and 5 show that there is a difference not only in the change of the blade angles α,β, but also in the part polished to form the blade, that is, the horizontal length of the blade surface.

Looking at the cross section close to the rotation axis 50, it can be seen that the horizontal length S1 of the blade surface is longer than the horizontal length S2 of the blade surface at a section far from the rotation axis 50. Since the effect of forming the upward flow on the object varies according to the change in the length of the blade surface, the cross-sectional profile of the object may be influenced during the grinding or mixing operation in combination with the change of the blade angle described above.

On the other hand, the cutting edge of each knife 100 is made of a concave curved shape. This has the effect that the radially outer end of the knife 100 comes into contact with the object ahead of the middle, for example, and thus moves the object from the radially outer end of the knife 100 in the middle direction. Therefore, this can alleviate the height of the container wall in the cross-sectional profile of the object during grinding or mixing operation.

The shape or structure of each knife 100 is particularly effective in suppressing noise generation, and according to an experimental example, even if only the rotary knife in the existing blender is replaced with the rotary knife according to the present invention, a noise reduction effect of about 2 to 3 dB is achieved. It turned out to be.

6 and 7 are a plan view and a front view of another embodiment of a rotary knife according to the present invention. In this example, the rear end wing 200 is attached to the rear end of each knife 100 (100b in FIG. 1). The rear wing 200 is arranged to be deflected upward from the rear end of the knife 100, thus inducing a more active ascent to the object to be crushed or mixed. In particular, since the rear wing 200 is disposed at the middle of the knife 100 based on the radial direction, it is possible to change the cross-sectional profile of the object in a blender according to the prior art.

In addition, in Figures 6 and 7 the end wing 300 is also shown. The end wing 300 is a plate-shaped portion extending upward from the radial end of the knife 100. This end wing 300 can be disposed close to the container wall of the blender, and can prevent the object to be crushed or mixed from being attached to the container wall.

8 and 9 are a plan view and a front view of another embodiment of a rotary knife according to the present invention. In this example, in addition to the above-described rotary knife, another rotary knife is added, and is referred to as a first rotary knife and a second rotary knife, respectively, for distinction. Since the first rotary knife may be the same as the rotary knife described with reference to FIGS. 1 to 7, the included knife 100 is also denoted by the same reference numerals. In particular, in FIG. 8 and FIG. 9, the first rotary knife is illustrated as including the tip blade 300, and an example further including the rear blade blade 200 described with reference to FIGS. 6 and 7 may also be assumed. The second rotary knife is disposed superimposed on the first rotary knife coaxially with the first rotary knife, and in particular has a shape that is bent at least twice along the radial direction from the rotary axis 50. 8 and 9, the second rotary knife is illustrated as including two knives 400, but the number of knives included may be changed as necessary, as described above. Each knife 400 of the second rotary knife is also formed with a cutting edge at the tip, and in particular, a portion farthest from the rotating shaft 50 along the radial direction is formed at a higher rear end than the tip, thereby forming an upward flow in the object to be crushed or mixed. can do. This form can be clearly seen from the front view of FIG. 9. Furthermore, a portion distant from the rotation axis 50 of each knife 400 of the second rotary knife has a smaller diameter than the first rotary knife, and may be disposed at a position corresponding to the middle of the first rotary knife, through which The upward flow can be strengthened in the middle region of the first rotary knife. In this case, it is obvious that each knife 400 of the second rotary knife has a smaller radial size than each knife 100 of the first rotary knife.

On the other hand, although not shown separately, the configuration that bends two or more times as described above and allows a portion distant from the rotating shaft 50 to form an upward flow in the object may also be applied to the knife 100 of the first rotating knife.

In addition, according to FIGS. 10 and 11, one embodiment of a volume control assembly inside a container according to the present invention is shown, for example, in a state installed in a blender container.

The container 600 and the lid 700 are commonly provided in a blender according to the prior art, and the container 600 receives an object to be crushed or mixed through the top of which is opened, and a rotary knife 500 is provided on the bottom surface. ) Is installed. The lid 700 may selectively cover the top of the container 600. Even if the lid 700 covers the top of the container 600, the interior space of the container 600 may not be completely closed to the outside due to a structural shape such as a beak for pouring the object. However, for reasons as described again below, it is preferable that the lid 700 can completely close the inner space of the container 600 to the outside.

A rotary knife 500 is rotatably installed on the bottom surface of the container 600, and the rotary knife 500 may be rotationally driven by a power source such as an electric motor. When the rotary knife 500 is rotated, the object accommodated in the container 600 flows up, down, left, and right as indicated by arrows in FIG. 10. Particularly, due to the action of centrifugal force, the side wall portion of the container 600 has a high water level and a rotary knife ( In the center where 500) is located, the water level tends to decrease.

The dividing plate 800 is in the form of a disc according to the cross-sectional shape of the container 600, and the inner space of the container 600 is divided into two. For example, in the form illustrated in FIG. 10, the inner space of the container 600 is divided into a first inner space 600a below it and a second inner space 600b above it based on the partition plate 800.

The dividing plate 800 may be moved up and down to adjust its height. For example, the dividing plate 800 may be moved up to the level of the object before operating the rotary knife 500 as illustrated in FIG. 11. When descending, the partition plate 800 divides the inner space of the container 600 into an object and an empty space. That is, the object fills the first inner space 600a and the second inner space 600b is empty, so that only air is filled. When the rotary knife 500 is operated in this state, the flow inside the object is made only within the first inner space 600a as illustrated by the arrow in FIG. 2, and thus the water level rises along the side wall of the container 600. There is no work to be done, and bubbles can also be suppressed from entering the object.

13, it can be seen that a ring-shaped lip seal 810 is provided at the circumferential edge of the dividing plate 800 to be in close contact with the inner wall surface of the container 600. This can not only scrape off the object attached to the inner wall surface of the container 600, but also can make the distinction between the first inner space 600a and the second inner space 600b as necessary. When the lip seal 810 is provided as described above, the elevation of the partition plate 300 may not be smooth due to a pressure difference between the first inner space 600a and the second inner space 600b. To this end, a ventilation valve may be formed in the partition plate 800 or a check valve that allows air flow only in a specific direction may be installed. When the check valve is installed, the pressure of any one of the first inner space 600a and the second inner space 600b may be increased according to the elevation of the dividing plate 800, which is selectively opened to eliminate the pressure difference. It is also possible that the valve can be additionally installed in the partition plate 800.

In the illustrated example, the container 600 is exemplified as having a cylindrical shape having the same inner diameter from the upper end to the lower end. Even in the case of the shape of the upper and lower canal, if the size of the lip seal 810 is acceptable, the dividing plate 800 of the same size ) Can be applied. However, when the inner diameter change rate of the container 600 is large, the partition plate 800 itself may be made of a flexible material so that it can be deformed accordingly.

As shown in the enlarged view of FIG. 14, an inflatable O-ring 820 may be provided at the circumferential edge of the dividing plate 800 in place of or in addition to a lip seal. The inflatable O-ring 820 is a circular tube shape having a hollow shape, and when the air is filled in the inner space, such as a tire, it can expand and contract when it is discharged. Through the selective contraction or expansion, the sealing force with respect to the wall of the container 600 may be adjusted, and although the width is small, the maximum radius combined with the radius of the partition plate 800 may also be adjusted. The configuration for injecting or discharging air into the inflatable O-ring 820 may include a manual air pump 1000 which will be described again below, but may be made of a separately provided air circuit.

An operation unit may be provided to move the partition plate 800 up and down. The operation unit may be made in various forms by utilizing a known mechanism, and is preferably air-operated as illustrated below.

The air-operated operation unit may include a manual air pump 1000 and a corrugated tube 900. The hand-operated air pump 1000 is installed on the lid 700, and for example, may pressurize the air in one direction by a user pressing and releasing it with a palm. Such a manual air pump 1000 can be easily seen in a commercial vacuum port, for example, since the configuration shown in Utility Model Utility Model No. 20-0354735 can be adopted, a detailed description of the internal configuration is omitted.

The corrugated tube 900 is made of a resilient material such as rubber or synthetic resin, and is installed on the lower surface of the lid 700 and has an inner space 900a sealed to the outside.

The corrugated tube 900 may expand in one direction when air is injected into the corrugated outer space 900a. When the dividing plate 800 is fixed to the end portion in the expansion direction, the corrugated tube 900 can elevate the dividing plate 800. That is, when the manual air pump 1000 is operated to inject air into the inner space 900a of the corrugated tube 900, the corrugated tube 900 expands according to the pressure, and the dividing plate 800 is a container 600 ) It descends from the inside.

The corrugated tube 900 gradually decreases in diameter from the first end of the disk shape having the largest diameter in FIGS. 9 to 11 and includes the second to fifth stages of the disk shape arranged in layers, and when contracted. The fifth stage is accommodated inside the fourth stage, the fourth stage is accommodated inside the third stage, and the like, such that the second to fifth stages are finally accommodated in the first stage. It is. However, the corrugated tube 900 may have other forms, such as a simple corrugated tube, as long as it can be telescopically operated by injecting or exhausting air therein.

FIG. 10 illustrates a state in which the dividing plate 800 is lowered, and a spring is installed as the elastic member 1100 as shown in the cross-sectional view of FIG. 11 to return to the initial state as in FIG. 9. Can be. This spring is an expansion coil spring installed between the lid 700 and the dividing plate 800, and is contracted when no external force is applied to approach the dividing plate 800 to the lid 700 and as illustrated in FIG. 9. Can be When the manual air pump 1000 is operated to inject air into the interior space 900a of the corrugated tube 900, the corrugated tube 900 starts to expand from the moment the pressure reaches a level capable of inflating the spring. Then, when the air is discharged from the inner space 900a of the corrugated tube 900, the corrugated tube 900 is also contracted by the restoring force of the spring.

At this time, a relief valve may be added to exhaust the inner space 900a of the corrugated tube 900.

The elastic member 1100 may be omitted if the pleated tube 900 has sufficient elasticity on its own and can maintain a posture contracted by the elastic force to a certain degree. In other words, it is also possible for the pleated tube 900 to function as the elastic member 1100.

On the other hand, normally the manual air pump 1000 operates by injecting the air outside the container 600 into the inner space 900a of the corrugated tube 900, but the air inside the container 600 is corrugated tube 900 ) Into the inner space 900a. For example, when the check valve and the direction change valve are combined, the air outside the container 600 may be provided with the same manual air pump 1000 and the corrugated tube 900 according to the user's selection. ) Or may be switched to inject the air inside the container 600 into the inner space 900a of the corrugated tube 900. The change of the air injection path can be easily implemented through a combination of a known check valve, a direction change valve, etc., so a detailed description thereof will be omitted.

In this case, in particular, if the lid 700 completely closes the container 600, the following additional effects may be obtained.

1) When the manual air pump 1000 injects the air outside the container 600 into the inner space 900a of the corrugated tube 900, when the corrugated tube 900 expands by pressure, the inside of the container 600 The pressures in the

spaces

600a and 600b may also increase, which may be higher than atmospheric pressure. Of course, when the elastic member 1100 is provided, the pressure inside the corrugated tube 900 may be higher than atmospheric pressure.

2) When the manual air pump 1000 injects the air inside the container 600 into the inner space 900a of the corrugated tube 900, when the elastic member 1100 is not provided, the corrugated tube 900 Since the pressure of the inner space 900a and the pressure of the

inner spaces

600a and 600b of the container 600 are equalized, there is no pressure difference other than a temporary pressure difference between the two spaces. Can remain the same. However, when the elastic member 1100 is provided, since the elastic member 1100 exerts a force in the direction of contracting the inner space 900a of the corrugated tube 900, the

inner spaces

600a, 600b of the container 600 ) May be lower than atmospheric pressure.

In this way, the internal pressure of the container 600 can be adjusted to be higher or lower than atmospheric pressure, and accordingly, it is possible to appropriately select the pressure inside the container 600 according to the characteristics of the object or whether it is necessary to mix bubbles.

In the above, the container of the blender has been described as an example, but the volume control assembly inside the container according to the present invention can be equally applied to a container that simply stores food.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of protection of the present invention is limited only by the items described in the claims, and a person having ordinary knowledge in the technical field of the present invention can improve and modify the technical spirit of the present invention in various forms.

Therefore, such improvements and modifications will fall within the protection scope of the present invention as long as it is apparent to those skilled in the art.

Claims

A rotary knife that includes a plurality of knives and rotates around a rotating shaft when used,

At least one of the plurality of knives,

A rotary knife for crushing or mixing in which the blade angle in a cross section perpendicular to the cutting edge of the tip portion with respect to the rotational direction of the rotary knife increases as it moves away from the rotary axis.
According to claim 1,

At least one of the plurality of knives, a rotary knife for crushing or mixing in which the length of the blade surface in the cross section perpendicular to the cutting edge becomes shorter as it moves away from the rotation axis.
According to claim 1,

At least one of the plurality of knives, the rotary knife for grinding or mixing the cutting edge forms a concave curve.
According to claim 1,

At least one of the plurality of knives, a rotary knife for crushing or mixing further comprising a plate-shaped rear end wing extending from a rear end with respect to the rotational direction of the rotary knife and oriented to induce an upward flow to the object to be crushed or mixed.
According to claim 1,

At least one of the plurality of knives, crushing or mixing rotary knife further comprising a plate-shaped end blade extending upward from the blade end which is an end far from the rotation axis.
According to claim 1,

At least one of the plurality of knives is bent at least twice in the radial direction from the rotating shaft, and the part farthest from the rotating shaft is crushed or mixed rotary knife oriented to induce an upward flow in the object to be crushed or mixed.
A first rotary knife that includes a plurality of knives, which rotates around the axis of rotation when used.

And a second rotary knife,

The first rotary knife and the second rotary knife are installed on the same rotary shaft, but the second rotary knife is installed on the upper side of the first rotary knife,

At least one of the plurality of knives of the first rotary knife,

The blade angle in the cross section perpendicular to the cutting edge of the tip portion with respect to the rotational direction of the rotary knife increases as it moves away from the rotation axis,

At least one of the plurality of knives of the second rotary knife,

A rotating knife assembly for crushing or mixing, which is bent at least twice in the radial direction from the rotating shaft, and a portion farthest from the rotating shaft is oriented to induce an upward flow in the object to be crushed or mixed.
The method of claim 7,

At least one of the plurality of knives of the second rotary knife bent at least twice,

A rotary knife assembly for grinding or mixing in which the radial size is smaller than the radial size of each of the plurality of knives of the first rotary knife.
The method of claim 7,

At least one of the plurality of knives of the first rotary knife, further comprising a rotary blade assembly for crushing or mixing further comprising a plate-shaped end blade extending upward from the blade end, which is an end far from the rotary shaft.
A lid which is detachable so as to seal the upper surface of the container for receiving the object to be stored, crushed or mixed, and

A disc-shaped partition plate arranged to divide the inner space of the container in the vertical direction;

A volume control assembly inside the container including an operation portion for lifting and lowering the partition plate with respect to the lid.
The method of claim 10,

The operation unit,

A manual air pump installed on the lid,

It includes a corrugated tube that is installed between the lid and the partition plate and has an inner space sealed to the outside and can be stretched in the vertical direction,

The manual air pump is an interior volume control assembly for injecting air into the interior of the corrugated tube during operation.
The method of claim 11,

The lid and the partition plate volume adjustment assembly inside the container further comprising an elastic member that exerts an elastic force in a direction close to each other.
The method of claim 11,

A volume control assembly inside the container that is operated to supply air outside the container to the corrugated tube when the manual air pump is operated.
The method of claim 11,

A volume adjustment assembly inside the container that is operated to supply air inside the container to the corrugated tube when the manual air pump is operated.
The method of claim 11,

And a relief valve for selectively discharging air inside the corrugated tube to the outside.
The method of claim 10,

A volume control assembly inside the container further comprising a lip seal installed along the edge of the partition plate.
The method of claim 10,

A volume control assembly inside the container further comprising an inflatable O-ring installed along the edge of the partition plate.