Stirrer and free spring part used for the same

Abstract

To provide a stirrer that can reduce powder-likeness in a beverage made by mixing powdery food in water.SOLUTION: A stirrer 1 for generating a protein solution by storing and shaking protein powder and water includes: a storage part 10 for storing powder and water that extends vertically; an upper part opening / closing part 11 provided on the upper part of the storage part 10 for putting the powder and water, and discharging the protein solution; and a free spring part 13 stored inside the storage part 10. The free spring part 13 includes a coil spring 20 in which a winding diameter is constant, the pitch in the central part is dense, and the pitch on both sides in the central part is coarse, and collision bodies 21 and 22 attached to both ends of the coil spring 20, and can move slidably along a vertical direction inside the storage part 10.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a stirring device for putting and stirring powdery food and water, and a free spring used therefor.

Background Art

[0002] Conventionally, as this type of technology, there is the technology described in Patent Document 1. Patent Document 1 has a storage part having an inner space extending vertically and having a grip shape on the outside, an opening / closing part, and a coil spring having a constant winding diameter and being movable freely in the vertical direction inside the storage part. The storage part stores a liquid in a state where a liquid (for example, water) and a substance (for example, oil, powder, grains, etc.) dispersed therein are mixed, and disperses the substance to be dispersed in the liquid, and realizes foaming by the user shaking it up and down or left and right by hand. A foaming device is disclosed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, those aiming to increase muscle mass and improve muscle strength are encouraged to drink protein within 30 minutes after exercise, which is also called the golden time. For this reason, the number of people carrying a water cylinder storing protein so that they can drink protein after exercise is also increasing. Therefore, in recent years, in order to make protein easier to drink, the appearance of a stirring device that can reduce the powdery feeling and make a protein liquid that is easy to swallow is desired.

[0005] An object of the present invention is to solve such problems and provide a stirring device that can reduce the powdery feeling in a beverage obtained by mixing powdery food with water, and a free spring used therefor.

Means for Solving the Problem

[0006] To achieve the above object, the present invention comprises the following configuration.

[0007] (1) A stirring device that stores a substance to be dispersed (e.g., protein powder) and a liquid (e.g., water) and generates a liquid (e.g., protein solution) in which the substance to be dispersed is dispersed in the liquid by shaking, a vertically extending storage part (e.g., storage part 10) that stores the substance to be dispersed and the liquid, an upper opening / closing part (e.g., upper opening / closing part 11) provided at the upper part of the storage part to open and close the opening of the storage part and to put in the substance to be dispersed and the liquid and to take out the liquid, and a free spring part (e.g., free spring part 13) stored inside the storage part, wherein the free spring part is stored inside the storage part and comprises a coil spring (e.g., coil spring 20) having a constant winding diameter, a dense pitch at the central part, and sparse pitches at both sides of the central part, the height of the coil spring is shorter than the height of the storage part, the outer diameter of the coil spring is shorter than the inner diameter of the storage part, and the coil spring is slidable along the vertical direction inside the storage part when the storage part is shaken in the vertical direction. The stirring device is characterized by this.

[0008] According to (1), a user can put the material to be dispersed and the liquid in the stirring device and shake it by hand to cause the coil spring to vibrate and swing, stirring the material to be dispersed in the liquid, and can immediately be taken out of the storage section and used. By providing a pitch of the coil spring with a density, it is easy to maintain the vibration and swing using the coil spring as a weight. Furthermore, the dense pitch part of the coil spring stirs the liquid, resulting in a shearing effect. In particular, by providing the dense pitch part in the center, when the stirring device 1 is swung up and down to slide the coil spring and the end of the coil spring hits the bottom surface of the storage section or the lower surface of the upper opening and closing section, the sparse part of the coil spring on the side that hits the bottom surface of the storage section or the lower surface of the upper opening and closing section from the center expands and contracts more, and the expansion and contraction width is smaller than that of the sparse part on the opposite side. This allows many turns of the coil spring to be placed above and below the storage section, which can break down powdery materials that tend to settle in the lower section of the storage section or that move to the top of the storage section and remain near the bottom of the upper opening / closing section. Moreover, each time the storage section is shook, the coil spring can collide twice with the bottom of the storage section and the bottom of the upper opening / closing section, and by increasing the number of collisions, the coil spring can be vibrated finely, breaking down powdery foods into fine particles. This reduces the powdery texture of powdery foods, making it possible to produce a liquid that is easy to swallow.

[0009] (2) In paragraph (1), The free spring portion is A first impact body (for example, a first impact body 21) attached to an upper end of the coil spring; A second impact body (e.g., a second impact body 22) attached to a lower end of the coil spring, A stirring device characterized in that, when the storage unit is shaken, the second collision body collides with a bottom surface of the storage unit, and the first collision body collides with a lower surface of the upper opening / closing part.

[0010] According to (2), both ends of the coil spring do not come into direct contact with the bottom surface of the storage part or the lower surface of the upper opening / closing part, and it is possible to prevent damage to the bottom surface of the storage part or the lower surface of the upper opening / closing part.

[0011] (3) In (2), the first collision body and the second collision body have the same shape, the first collision body and the second collision body include a cylindrical part (for example, cylindrical parts 210 and 220) into which the end of the coil spring can be inserted inside, a donut-shaped flat plate part (for example, inner flat plate parts 212 and 222) extending from the upper end of the cylindrical part toward the central axis of the cylindrical part, and a fan-shaped recess (for example, recesses 21a and 22a) formed at the corner of the cylindrical part and the flat plate part, the recess includes a wall surface part (for example, wall surface parts 215 and 225) extending vertically along the central axis from a part of the central hole formed in the central part of the flat plate part, a horizontal surface part (for example, horizontal surface parts 216 and 226) extending from the end of the wall surface part to the cylindrical part, a pair of side surface parts (for example, side surface parts 217, 217, side surface parts 227, 227) extending along the circumferential direction both sides of the wall surface part to the circumferential direction both sides of the horizontal surface part, and a notch part (for example, notches 218, 218, notches 228, 228) formed by notching the root part of the pair of side surface parts with the horizontal surface part and the cylindrical part, the notch part has a notch width through which the end of the coil spring can be inserted, and is a stirring device.

[0012] (3) According to (3), by inserting the end of the coil spring into the notch part and sandwiching the horizontal surface part between the springs, or engaging two adjacent winding wires with the upper and lower surfaces of the notch part, it becomes possible to attach the collision body to the end of the coil spring.

[0013] (4) In (3), a stirring device characterized in that a plurality of protrusions (for example, small protrusions 210a, 210a, small protrusions 220a, 220a) protruding downward are formed on the lower end surface of the cylindrical portion.

[0014] According to (4), when the collision body collides with the bottom surface of the storage portion, since a plurality of protrusions (for example, small protrusions 220a, 220a) collide, the collision area in the collision body can be reduced. Thereby, it becomes possible to reduce the collision sound.

[0015] (5) In (3), a stirring device characterized in that a plurality of bulging portions (for example, bulging portions 222a, 222a) bulging toward the central axis of the cylindrical portion are formed on the inner end surface of the flat plate portion.

[0016] According to (5), by forming the bulging portion on the inner end surface of the flat plate portion, the area of the lower surface of the inner flat plate portion can be increased, so that it becomes possible to apply water pressure more efficiently to the bottom surface of the storage portion and the lower surface of the upper opening / closing portion, and it becomes possible to diffuse the sediment near the bottom surface of the storage portion and the deposit near the lower surface of the upper opening / closing portion.

[0017] (6) In (3) to (5), a stirring device characterized in that a plurality of hole portions (for example, long holes 214, long holes 224) are formed on the flat plate surface of the flat plate portion.

[0018] According to (6), also, since a plurality of hole portions are formed on the flat plate surface of the flat plate portion, when the collision body moves up and down, the sediment near the bottom surface of the storage portion and the deposit near the lower surface of the upper opening / closing portion easily pass through the hole portions and move to the lower part of the coil spring. (7) A free spring that is inserted into the inside of a container body having an upward and downward extending storage portion for storing a substance to be dispersed and a liquid, and an upper opening / closing portion provided at the upper part of the storage portion for opening and closing the opening of the storage portion, and generates a liquid substance in which the substance to be dispersed is dispersed in the liquid by shaking the container body. A coil spring having a constant winding diameter, a dense pitch at the central portion, and a sparse pitch at both sides of the central portion. A first collision body attached to the upper end of the coil spring, and a second collision body attached to the lower end of the coil spring, wherein the free spring is characterized by comprising the same.

[0019] According to (7), by inserting the free spring of the present invention into a container body for storing a solid and a liquid and shaking it, the same operational effects as (1) can be achieved.

Advantages of the Invention

[0020] According to the present invention, it is possible to provide a stirring device capable of reducing the powdery feeling in a beverage obtained by mixing a powdery food with water.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0022] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Components with the same reference numerals in the drawings have the same configuration and function.

[0023] FIG. 1 is a side view showing the appearance of a stirring device 1 in an embodiment of the present invention. FIG. 2 is an exploded perspective view showing the constituent members of the stirring device 1 in an embodiment of the present invention.

[0024] [Configuration] The stirring device 1 includes a storage part 10, an upper opening / closing part 11, a cap part 12, and a free spring part 13. The stirring device 1 puts an object to be dispersed (for example, protein powder) and a liquid (for example, water) into the storage part 10, further inserts the free spring part 13, attaches the upper opening / closing part 11 with the cap part 12 attached to the storage part 10 to close and seal the opening of the storage part 10, and stirs by shaking the storage part 10 vertically, horizontally, and laterally, thereby generating a liquid body in which the object to be dispersed is diffused. The user can take out the liquid body by removing the cap part 12. In the following description, as an example, protein powder is put into the storage part 10 as the object to be dispersed and water is put as the liquid, and a protein liquid is generated as the liquid body by stirring.

[0025] The storage unit 10 is a bottomed cylindrical container capable of storing a protein solution. The bottom surface portion of the storage unit 10 is formed in a disc shape with an outer diameter of about 70 millimeters, and the side surface of the storage unit 10 extends while gradually reducing its diameter upward from the bottom surface. For this reason, the storage unit 10 is a conical container similar to a cylinder with the top portion missing, and has gentle constrictions at the upper and lower portions with respect to the central portion. As a result, since the central portion is thicker, it is easier for the user to hold the storage unit 10. For the sake of convenience in the following description, the direction along the central axis of the storage unit 10 will be referred to as the vertical direction, the bottom surface side of the storage unit 10 will be referred to as the lower side, and the opening side will be referred to as the upper side.

[0026] The storage unit 10 is made of a transparent or translucent and flexible material such as polyethylene or polypropylene, and the situations such as separation, precipitation, and dispersion of the contents can be visually confirmed. By pushing it in as if grasping it with the hand holding the storage unit 10, the protein solution inside can be extruded. Note that the material of the storage unit 10 may be colored, or may be lightly colored. Also, the storage unit 10 may be a transparent material with a design drawn on it.

[0027] The size of the storage unit 10 depicted in FIG. 1 can be, for example, a height of 170 millimeters and a diameter of the central portion held by a person of 60 millimeters. A diameter from 50 millimeters to 70 millimeters, a height from 150 millimeters to 170 millimeters, and a capacity of about 280 milliliters to 400 milliliters are appropriate for a person to hold and shake. The shape of the storage unit 10 depicted in FIG. 1 is drawn to be close to a cylinder, but other shapes may also be used. In order to increase the storage capacity, the central portion may be made slightly wider, or in order to prevent it from slipping out of the hand when shaking the stirring device 1, the central portion may be made into a shape that is easy to grip, for example, a shape that is easy to grip by placing a finger on it.

[0028] The upper end portion of the storage part 10 has a flat plate portion 10a that extends inward in a donut shape and a cylindrical portion 10b that extends upward from the flat plate portion 10a. The flat plate portion 10a extends by a length approximately equal to the wall thickness of the lower cylindrical portion 11a of the upper opening / closing part 11 described later. The cylindrical portion 10b has a thread on its side surface. That is, an opening is formed at the upper end portion of the storage part 10 by the cylindrical portion 10b.

[0029] The upper opening / closing part 11 is attached to the upper end portion of the storage part 10 and constricts the opening at the upper end portion of the storage part 10, making it easier for the user to drink the liquid stored inside the storage part 10. The upper opening / closing part 11 is composed of a lower cylindrical portion 11a formed in a cylindrical shape with an outer diameter substantially the same as the outer diameter of the flat plate portion 10a in the storage part 10, a flat plate portion 11b that extends inward in a donut shape from the upper end of the lower cylindrical portion 11a, and an upper cylindrical portion 11c that extends upward from the edge of the central hole portion of the flat plate portion 11b. The central axis of the lower cylindrical portion 11a and the central axis of the upper cylindrical portion 11c coincide. A thread groove that engages with the thread formed at the upper end portion of the storage part 10 is formed on the inner side surface of the lower cylindrical portion 11a. A thread is formed on the outer side surface of the upper cylindrical portion 11c for screwing with the cap part 12.

[0030] The cap part 12 is composed of a cylindrical body with a closed upper side, and a thread groove that engages with the thread formed on the outer side surface of the upper cylindrical portion 11c is formed on the cylindrical inner side surface.

[0031] After storing the protein powder and water in the storage unit 10, the upper opening / closing unit 11 with the cap unit 12 attached is screwed onto the upper part of the storage unit 10, so that the storage unit 10 can maintain a sealing property to prevent water from spilling out. When the upper opening / closing unit 11 is screwed onto the storage unit 10, the outer side surface of the storage unit 10 and the outer side surface of the upper opening / closing unit 11 are generally flush, and the lower surface of the lower cylindrical part 11a abuts against the flat plate part 10a. In this embodiment, the sealing property of the storage unit 10 is maintained by tightening the upper opening / closing unit 11 to the storage unit 10 in a screw manner. However, not limited to the screw type, as long as the storage unit 10 can maintain a sealing property such that the protein liquid does not spill even when the storage unit 10 is shaken by hand with the upper opening / closing unit 11 tightened to the storage unit 10, other opening / closing means such as a fitting type can also be used.

[0032] The free spring part 13 includes a coil spring 20, a first collision body 21 attached to one end of the coil spring 20, and a second collision body 22 attached to the other end of the coil spring 20.

[0033] The free spring part 13 is disposed inside the storage unit 10 to which the upper opening / closing unit 11 is attached. The coil spring 20 is inserted into the storage unit 10 from the side of the second collision body 22, and then the first collision body 21 is inserted. In this way, the second collision body 22 abuts against the bottom surface of the storage unit 10, and the coil spring 20 is stored inside the storage unit 10 with the first collision body 21 spaced apart from the lower surface of the upper opening / closing unit 11.

[0034] The design of the coil spring 20 (the density of the pitch, the wire diameter constituting the coil spring) will be described later with reference to FIGS. 6 to 8. The coil spring 20 can slide in the vertical and horizontal directions inside the storage unit 10, and the user can freely perform movements including vibration and rocking by shaking the storage unit 10 up, down, left, and right. As the material of the coil spring 20, for example, iron (steel), stainless steel, titanium, titanium alloy, aluminum, plastic, etc. can be used. The wire constituting the coil spring 20 may have various surfaces with unevenness.

[0035] The coil spring 20 is a coil spring with a constant coil diameter. The coil diameter is smaller than the horizontal size inside the storage part 10. When the user holds the storage part 10 in hand and shakes it, the coil spring 20 can slide vertically or horizontally and collide with the inner surface of the storage part 10 or the lower surface of the upper opening / closing part 11, so that a spatial margin allowing movement including vibration and swaying by the coil spring 20 is designed to be formed inside the storage part 10. Here, vibration means that the coil spring 20 moves in the direction of the central axis, and swaying means the movement of swinging in a direction perpendicular to the direction of the central axis of the coil spring 20.

[0036] The coil spring 20 has a tightly wound state where about 7 or 8 turns are adjacent to each other in the central part in the normal state, and a plurality of turns of coils on both sides of this central part have a slight gap between adjacent coils in the normal state. The length of the coil spring 20 is desirably 50% to 70% of the height inside the storage part 10. If it is too short, the stirring efficiency of the whole liquid body becomes small. If it is too long, the degree of freedom of movement including vibration and swaying becomes narrow.

[0037] The coil spring 20 vibrates and sways, exerting a shearing effect on the protein powder. Also, when the surface of the coil spring 20 has various surfaces and has irregularities, the surface shape of the coil spring 20 also exerts a shearing effect on the protein powder. As a result, the protein powder is refined and homogenized, and the dispersion in water is promoted.

[0038] Figure 3 is a perspective view showing the appearance of the first collision body 21. Figure 3(a) is a view of the first collision body 21 viewed obliquely from above, and Figure 3(b) is a view of the first collision body 21 viewed obliquely from below.

[0039] The first collision body 21 includes a cylindrical part 210 and a donut-shaped inner flat part 212 extending radially inward from the upper end of the cylindrical part 210, and is made of the same material as the storage part 10.

[0040] The outer diameter of the cylindrical portion 210 is set to be shorter than the inner diameter of the opening of the storage portion 10 and longer than the inner diameter of the upper cylindrical portion 11c. That is, the outer diameter of the cylindrical portion 210 is within the range of the flat plate portion 11b. Further, the outer diameter of the cylindrical portion 210 is set to be shorter than the inner diameter of the most constricted portion in the storage portion 10. Also, the inner diameter of the cylindrical portion 210 is set to be substantially the same as the outer diameter of the coil spring 20. Specifically, the outer diameter of the coil spring 20 is about 36 mm, and the outer diameter of the cylindrical portion 210 is about 38 mm. For this reason, the coil spring 20 and the first collision body 21 can be stored inside the storage portion 10.

[0041] A hole portion 213 is formed at the center of the inner flat plate portion 212, and a plurality of arc-shaped long holes 214 are formed at a plurality of locations on the outer peripheral portion of the inner flat plate portion 212. The inner diameter of the hole portion 213 is set to be shorter than the outer diameter of the coil spring 20. The long holes 214 are formed at 7 locations at equal intervals.

[0042] Also, a fan-shaped recess 21a is formed in a part of the corner formed by the cylindrical portion 210 and the inner flat plate portion 212. This recess 21a is formed by cutting out a part of the corner formed by the cylindrical portion 210 and the inner flat plate portion 212 into a fan shape, and this cut-out portion is covered by the wall surface portion 215, the horizontal surface portion 216, and the side surface portions 217, 217. That is, the wall surface portion 215 extends vertically downward from the edge of the hole portion 213. Also, from the lower end portion of the wall surface portion 215, the horizontal surface portion 216 extends toward the lower end of the cylindrical portion 210 in the cut-out portion. Further, the side surface portions 217, 217 extend along the circumferential direction both sides of the horizontal surface portion 216 from the circumferential direction both sides of the wall surface portion 215. The inner flat plate portion 212 and the wall surface portion 215 are perpendicular, and the upper surface of the inner flat plate portion 212 and the upper surface of the wall surface portion 215 are parallel.

[0043] Notches 218, 218 extending along the circumferential direction of the cylindrical portion 210 are formed at the root portions of the side faces 217, 217 with the horizontal face portion 216 and a part of the cylindrical portion 210. The lower surface of the notch 218 and the upper surface of the horizontal face portion 216 are flush. According to the present embodiment, the angle of the notch ends of the notches 218, 218 with respect to the central axis of the cylindrical portion 210 is set to about 89 degrees. The portions formed on the wall face portion 215 in the notch 218 have the upper and lower surfaces of the notches 218, 218 slightly inclined so that the notch width becomes narrower toward the wall face portion 215. The notch width of the notches 218, 218 is set to a width through which the coil spring 20 for two turns can be inserted. The upper surface at the portion of the notch 218 is flush with the lower surface of the inner flat plate portion 212.

[0044] According to the present embodiment, the first impact body 21 has a shape that is line-symmetric with respect to a virtual plane including the central axis of the cylindrical portion 210 and the center of the horizontal face portion 216.

[0045] When attaching the first collision body 21 to one end of the coil spring 20, first, the inner flat plate portion 212 is opposed to one end of the coil spring 20, and one end of the coil spring 20 is opposed to one of the notches 218 of the first collision body 21. Then, the first collision body 21 is rotated so that one end of the coil spring 20 is inserted into one notch 218 and moved along the inner surface of the cylindrical portion 210, inserted into the other notch 218, and moved along the inner surface of the cylindrical portion 210. In this way, about 2.5 turns of one end of the coil spring 20 are inserted into the first collision body 21, and a part of one end of the coil spring 20 is positioned above the inner flat plate portion 212 and the other part is positioned below the inner flat plate portion 212, whereby the first collision body 21 is attached to one end of the coil spring 20. When at least one turn of one end of the coil spring 20 is inserted into the first collision body 21, from the second turn onwards, the tip of the one end side of the coil spring 20 may be arranged on the upper surface of the horizontal surface portion 216 without being inserted into the notch 218. Further, when attaching the first collision body 21 to a coil spring 20 whose end is not tightly wound (see, for example, FIG. 6(c)), the first turn is inserted through the notches 218, 218, and the second turn, the coil spring 20 may or may not be inserted into at least one of the notches 218, and further, it may be placed on the upper surface of the horizontal surface portion 216. As a result, the coil spring 20 abuts on the upper and lower surfaces of one notch 218 in a slightly contracted state, whereby the coil spring 20 is engaged with the notch 218, and the first collision body 21 is attached to one end of the coil spring 20.

[0046] Note that the second collision body 22 includes a recess 22a, a cylindrical portion 220, a small protrusion 220a, an inner flat plate portion 222, a bulging portion 222a, a hole portion 223, a long hole 224, a wall surface portion 225, a horizontal surface portion 226, a side surface portion 227, and a notch 228, which correspond to the recess 21a, the cylindrical portion 210, the small protrusion 210a, the inner flat plate portion 212, the bulging portion 212a, the hole portion 213, the long hole 214, the wall surface portion 215, the horizontal surface portion 216, the side surface portion 217, and the notch 218 included in the first collision body 21. Since the first collision body 21 and the second collision body 22 have the same shape, a detailed description of the configuration of the second collision body 22 is omitted.

[0047] The second collision body 22 is attached to the other end of the coil spring 20. Since the method of attaching the second collision body 22 to the coil spring 20 is the same as the method of attaching the first collision body 21 to one end of the coil spring 20, a detailed description thereof will be omitted.

[0048] Then, by attaching the first collision body 21 to one end of the coil spring 20 and the second collision body 22 to the other end, the free spring portion 13 is formed. According to the present embodiment, the natural length of the coil spring 20 is about 105 to 110 mm, and the heights of the first collision body 21 and the second collision body 22 are about 10 to 13 mm. Therefore, the length of the free spring portion 13 is about 120 mm. By inserting this free spring portion 13 into the storage portion 10 from the side of the second collision body 22, as shown in FIG. 1, the second collision body 22 abuts against the bottom surface of the storage portion 10. Here, since the height of the storage portion 10 is about 170 mm, when the upper opening / closing portion 11 is attached to the storage portion 10, the lower surface of the flat plate portion 11b of the upper opening / closing portion 11 and the upper surface of the first collision body 21 are separated from each other by about 50 mm. Therefore, by shaking the storage portion 10 up and down, the free spring portion 13 slides up and down inside the storage portion 10, the second collision body 22 collides with the bottom surface of the storage portion 10, and the first collision body 21 collides with the lower surface of the flat plate portion 11b of the upper opening / closing portion. Further, in a state where the free spring portion 13 is located at the center of the bottom surface of the storage portion 10, the space between the free spring portion 13 and the inner surface of the storage portion 10 is separated by about 6 to 16 mm. Therefore, by shaking the storage portion 10 up and down, the free spring portion 13 can slide horizontally inside the storage portion 10.

[0049] FIG. 4 is a perspective view showing the appearance of a modified example of the first collision body 21. FIG. 4(a) is a view of the modified example of the first collision body 21 viewed obliquely from above, and FIG. 4(b) is a view of the modified example of the first collision body 21 viewed obliquely from below. FIG. 5 is a view of the first collision body 21 in FIG. 4(b) viewed from below.

[0050] The modified example of the first collision body 21 shown in FIG. 4 is obtained by further forming a plurality of bulging portions 212a and a plurality of small protrusions 210a on the first collision body 21 shown in FIG. 3. The bulging portion 212a bulges toward the central axis side of the cylindrical portion 210 from a plurality of locations (seven locations according to this embodiment) on the inner end surface of the inner flat portion 212 that forms the hole portion 213. The bulging portion 212a bulges slightly in a convex arc shape and is formed at a portion closer to the central axis side of the cylindrical portion 210 with respect to the long hole 214 on the inner end surface of the inner flat portion 212. As shown in FIG. 5, the small protrusions 210a are substantially elliptical in plan view when viewed from below, and bulge downward from a plurality of locations (eight locations according to this embodiment) on the lower end surface of the cylindrical portion 210. The small protrusions 210a bulge slightly in a convex arc shape, and the eight small protrusions 210a are arranged such that adjacent small protrusions 210a, 210a are spaced 45 degrees with respect to the central axis of the cylindrical portion 210.

[0051] The method of attaching the modification example of the first collision body 21 shown in FIG. 4 to the coil spring 20 is the same as that of the first collision body 21 shown in FIG. 3, and thus the description thereof is omitted. It should be noted that the modification example of the first collision body 21 can also be applied as the second collision body 22.

[0052] [Density of Coil Spring Pitch] FIG. 6 is a diagram for explaining in detail the density of the coil spring pitch and the wire diameter constituting the coil spring. Here, the material used is stainless steel SUS304. The coil spring shown in Fig. 6(a) has a wire diameter of 1.4 millimeters that makes up the spring, an outer diameter (coil diameter) of 36 millimeters, a natural length of the spring (length when placed horizontally) of 108.5 millimeters, a length of the portion wound tightly without gaps at one end (6 coils tightly wound) of 8.4 millimeters, a length of the portion wound tightly without gaps at the center (7 coils tightly wound) of 9.8 millimeters, and a length of the portion wound tightly without gaps at the other end (2 coils tightly wound) of 2.8 millimeters. The length of the portion between the tightly wound portion at one end and the tightly wound portion at the center (the portion with a sparse pitch) is 38.5 millimeters (18 turns × 1.4 millimeters + 19 gaps × 0.7 millimeters = 25.2 millimeters + 13.3 millimeters). The length of the portion between the tightly wound portion at the other end and the tightly wound portion at the center (the portion with a sparse pitch) is 49.0 millimeters (23 turns × 1.4 millimeters + 24 gaps × 0.7 millimeters = 32.2 millimeters + 16.8 millimeters).

[0053] The coil spring shown in Fig. 6(b) has a wire diameter of 1.4 millimeters that makes up the spring, an outer shape (coil diameter) of 36 millimeters, a natural length of the spring (length when placed horizontally) of 108.5 millimeters, a length of the portion wound tightly without gaps at one end (6 coils tightly wound) of 8.4 millimeters, a length of the portion wound tightly without gaps at the center (7 coils tightly wound) of 9.8 millimeters, and a length of the portion wound tightly without gaps at the other end (2 coils tightly wound) of 2.8 millimeters. The length of the portion between the tightly wound portion at one end and the tightly wound portion at the center (the portion with a sparse pitch) is 40.4 millimeters (18 turns × 1.4 millimeters + 19 gaps × 0.8 millimeters = 25.2 millimeters + 15.2 millimeters). The length of the portion between the tightly wound portion at the other end and the tightly wound portion at the center (the portion with a sparse pitch) is 47.0 millimeters (21 turns × 1.4 millimeters + 22 gaps × 0.8 millimeters = 29.4 millimeters + 17.6 millimeters).

[0054] The coil spring shown in Fig. 6(c) has a wire diameter of 1.4 millimeters that makes up the spring, an outer diameter (coil diameter) of 36 millimeters, and a natural length of the spring (length when placed horizontally) of 109.6 millimeters. There is no portion with close winding like the coil springs shown in Figs. 6(a) and 6(b) at both ends. The length of the portion with no gap and close winding in the central part (8 coils in close winding) is 11.2 millimeters. The length of the portion between one end and the close-wound portion in the central part (portion with a sparse pitch) is 49.2 millimeters (22 turns × 1.4 millimeters + 23 gaps × 0.8 millimeters = 30.8 millimeters + 18.4 millimeters). The length of the portion between the other end and the close-wound portion in the central part (portion with a sparse pitch) is 49.2 millimeters (22 turns × 1.4 millimeters + 23 gaps × 0.8 millimeters = 30.8 millimeters + 18.4 millimeters).

[0055] The coil spring shown in Fig. 7(a) has a wire diameter of 1.3 millimeters that makes up the spring, an outer diameter (coil diameter) of 36 millimeters, and a natural length of the spring (length when placed horizontally) of 105.1 millimeters. The length of the portion with no gap and close winding at one end (6 coils in close winding) is 7.8 millimeters. The length of the portion with no gap and close winding in the central part (7 coils in close winding) is 9.1 millimeters. The length of the portion with no gap and close winding at the other end (2 coils in close winding) is 2.6 millimeters. The length of the portion between the close-wound portion at one end and the close-wound portion in the central part (portion with a sparse pitch) is 38.6 millimeters (18 turns × 1.3 millimeters + 19 gaps × 0.8 millimeters = 23.4 millimeters + 15.2 millimeters). The length of the portion between the close-wound portion at the other end and the close-wound portion in the central part (portion with a sparse pitch) is 47.0 millimeters (23 turns × 1.3 millimeters + 23 gaps × 0.8 millimeters = 28.6 millimeters + 18.4 millimeters).

[0056] The coil spring shown in Fig. 7(b) has a wire diameter of 1.3 millimeters that makes up the spring, an outer diameter (coil diameter) of 36 millimeters, a natural length of the spring (length when placed horizontally) of 105.1 millimeters, a length of the tightly wound part with no gap at one end (6 coils tightly wound) of 7.8 millimeters, a length of the tightly wound part with no gap at the central part (7 coils tightly wound) of 9.1 millimeters, a length of the tightly wound part with no gap at the other end (2 coils tightly wound) of 2.6 millimeters, a length of the part between the tightly wound part at one end and the tightly wound part at the central part (the part with a sparse pitch) of 42.8 millimeters (18 turns × 1.3 millimeters + 21 gaps × 0.8 millimeters = 26.0 millimeters + 16.8 millimeters), and a length of the part between the tightly wound part at the other end and the tightly wound part at the central part (the part with a sparse pitch) of 42.8 millimeters (18 turns × 1.3 millimeters + 21 gaps × 0.8 millimeters = 26.0 millimeters + 16.8 millimeters).

[0057] The coil spring shown in Fig. 8(a) has a wire diameter of 1.3 millimeters that makes up the spring, an outer diameter (coil diameter) of 36 millimeters, a natural length of the spring (length when placed horizontally) of 106.2 millimeters, a length of the tightly wound part with no gap at one end (6 coils tightly wound) of 7.8 millimeters, a length of the tightly wound part with no gap at the central part (8 coils tightly wound) of 10.4 millimeters, a length of the tightly wound part with no gap at the other end (2 coils tightly wound) of 2.6 millimeters, a length of the part between the tightly wound part at one end and the tightly wound part at the central part (the part with a sparse pitch) of 38.7 millimeters (19 turns × 1.3 millimeters + 20 gaps × 0.7 millimeters = 24.7 millimeters + 14.0 millimeters), and a length of the part between the tightly wound part at the other end and the tightly wound part at the central part (the part with a sparse pitch) of 46.7 millimeters (23 turns × 1.3 millimeters + 24 gaps × 0.7 millimeters = 29.9 millimeters + 16.8 millimeters).

[0058] The coil spring shown in Fig. 8(b) has a wire diameter of 1.3 millimeters that makes up the spring, an outer diameter (coil diameter) of 36 millimeters, a natural length of the spring (length when placed horizontally) of 106.2 millimeters, a length of the portion wound tightly without gaps at one end (6 coils wound tightly) of 7.8 millimeters, a length of the portion wound tightly without gaps at the center (8 coils wound tightly) of 10.4 millimeters, and a length of the portion wound tightly without gaps at the other end (2 coils wound tightly) of 2.6 millimeters. The length of the portion (portion with a sparse pitch) between the tightly wound portion at one end and the tightly wound portion at the center is 42.7 millimeters (21 turns × 1.3 millimeters + 22 gaps × 0.7 millimeters = 27.3 millimeters + 15.4 millimeters). The length of the portion (portion with a sparse pitch) between the tightly wound portion at the other end and the tightly wound portion at the center is 42.7 millimeters (21 turns × 1.3 millimeters + 22 gaps × 0.7 millimeters = 27.3 millimeters + 15.4 millimeters).

[0059] When mixing protein powder with water, a spring with a wire diameter ranging from 1.3 millimeters to 1.4 millimeters is suitable.

[0060] The natural length of the spring is preferably from 100 millimeters to 110 millimeters, which corresponds to 60% to 70% in terms of the ratio to the length of the storage part 10.

[0061] The pitch of the spring is preferably 7 to 8 turns with the center wound tightly (wound without gaps), and on both sides of the center, the gap between the spring wires is preferably from 0.7 millimeters to 0.8 millimeters.

[0062] Since the coil spring 20 is in a slidable state inside the storage unit 10, by shaking the storage unit 10 up and down, the first collision body 21 collides with the bottom surface of the storage unit 10, and the second collision body 22 collides with the lower surface of the flat plate portion 11b of the upper opening / closing portion 11. Then, the coil spring 20 slides while vibrating inside the storage unit 10. As a result, the protein powder contained in the liquid in the storage unit 10 can be made finer. Also, by shaking the storage unit 10 horizontally, the coil spring 20 can be made to collide with the inner side surface of the storage unit 10. Thereby, it becomes possible to scrape off the protein powder adhering to the inner side surface of the storage unit 10.

[0063] Further, since the central portion of the coil spring 20 is closely wound and the both sides of the central portion are sparse, the sparse portion above the central portion expands and contracts greatly with respect to the central portion, and the expansion and contraction of the sparse portion below the central portion with respect to the central portion is small. Also, when the first collision body 21 hits the bottom of the storage unit 10, the closely wound central portion moves downward due to inertia, so the sparse portion above the central portion expands greatly, and the sparse portion below the central portion contracts. Similarly, when the second collision body 22 hits the flat plate portion 11b of the upper opening / closing portion 11, the closely wound central portion moves upward due to inertia, so the sparse portion below the central portion expands greatly, and the sparse portion above the central portion contracts. Here, the protein powder has variations in particle size, and when mixed with water, the larger particles move downward more. Thus, by repeatedly shaking the storage unit 10 up and down or shaking the storage unit 10 upside down, it becomes easier to apply the vibration of the sparse portion below the central portion in the coil spring 20 to the larger particles.

[0064] [Function and mechanism] The function and mechanism of the stirring device 1 of this embodiment can be explained from two viewpoints. First, by the coil spring vibrating and rocking, the liquid is stirred. Thereby, lumps of oil, lumps of grains, lumps of sediment, etc. are sheared and made smaller, and dispersed in the liquid.

[0065] Second, a function and mechanism based on the harmonic resonance (scaling resonance) of sound can be considered. The storage section 10 of the stirring device 1 stores a liquid, and when the user holds it by hand and shakes it after tightening the upper opening / closing section 11 to which the cap section 12 is attached, an impact is applied to the coil spring 20. Then, due to this impact, the coil spring 20 vibrates and sways. As this vibration and swaying are transmitted, sound (including not only audible sound but also the possibility of lower or higher sound) is generated. When the user shakes the stirring device 1 multiple times, this sound also continues to be generated continuously.

[0066] On the other hand, it is considered that clusters of protein powder particles, sediment clusters, etc. mixed in the liquid exist as molecular clusters. And when they collide with each other, sound is also generated.

[0067] The sound generated by the vibration and swaying of the coil spring and the sound generated when molecular clusters mixed in the liquid collide with each other can be in a harmonic (overtone) relationship. The harmonic (overtone) of the sound generated by the vibration and swaying of the spring causes scaling resonance with the collision of the molecular clusters mixed in the liquid. Thereby, the mixing and stirring of the liquid, and thus the dispersion of oil, particles, sediment, etc. are promoted.

[0068] Here, scaling resonance is a phenomenon in which resonance occurs at harmonics (overtones) dozens of octaves higher. It is a concept used in "The Sound of Proteins" (written by Yoichi Fukakawa, Chikumashobo Primers).

[0069] Resonance and resonance are similar concepts, but in this specification, they will be considered separately. For example, when one of two strings fixed to the same metal frame (solid) is vibrated, the other also vibrates. In this case, since the vibration is transmitted through the solid of the wooden metal frame, it is resonance. On the other hand, when sound is transmitted through water, air, etc. (fluids) and as a result causes vibration, it is resonance.

[0070] In the case of the stirring device 1 of this embodiment, the vibration is transmitted from the coil spring 20 to the molecules such as particles and precipitates through a fluid (liquid). Therefore, it should be called resonance. Thus, it is considered that the overtone resonance or scaling resonance of sound functions.

[0071] In the stirring device 1 of this embodiment, when paying attention to the macroscopic behavior of the liquid, the liquid acts to move by the user's shaking, impact the coil spring, and vibrate and swing the coil spring. On the other hand, when paying attention to the microscopic behavior of the liquid, clusters (lumps in which several molecules are stuck together) such as particles and precipitates contained in the liquid are subjected to a force to reduce the size of the cluster by overtone resonance or scaling resonance. As a result, a shearing effect is received, and particles, precipitates, etc. reduce the cluster and achieve uniform mixing. Thereby, the stirring device 1 of this embodiment can produce a protein solution with a better texture.

[0072] In the stirring device 1 of this embodiment, since the central portion of the coil spring 20 is dense, when the stirring device 1 is shaken up and down, the expansion and contraction widths on both sides of the central portion of the coil spring 20 can be alternately changed. For example, at the moment when the first collision body 21 collides with the bottom surface of the storage portion 10, the lower portion of the coil spring 20 shrinks more than the upper portion. As a result, the impact when the first collision body 21 collides with the bottom surface of the storage portion 10 is absorbed by the lower portion of the coil spring 20, so that the collision sound can be reduced. Similarly, at the moment when the second collision body 22 collides with the flat plate portion 11b of the upper opening / closing portion 11, the upper portion of the coil spring 20 shrinks more than the lower portion. As a result, the impact when the second collision body 22 collides with the flat plate portion 11b of the upper opening / closing portion 11 is absorbed by the upper portion of the coil spring 20, so that the collision sound can be reduced. In particular, as shown in FIG. 5, in the case of the first collision body 21 and the second collision body 22 having the small protrusions 210a and 220a, since the small protrusions 210a and 220a collide with the bottom surface of the storage portion 10 and the flat plate portion 11b of the upper opening / closing portion 11, the regions of the first collision body 21 and the second collision body 22 that collide with the bottom surface of the storage portion 10 and the flat plate portion 11b of the upper opening / closing portion 11 are reduced, and the collision sound can be reduced. Moreover, every time the storage portion is shaken once, the coil spring 20 can be made to collide twice with the bottom surface of the storage portion 10 and the lower surface of the flat plate portion 11b of the upper opening / closing portion 11, and the coil spring 20 can be finely vibrated every time it collides. Thereby, it becomes possible to reduce the powdery feeling of the powdery food and generate a liquid that is easy to swallow.

[0073] In the stirring device 1 of this embodiment, since the first collision body 21 and the second collision body 22 are attached to both ends of the coil spring 20, the coil spring 20 does not directly contact the bottom surface of the storage portion 10 or the lower surface of the flat plate portion 11b of the upper opening / closing portion 11, and it is possible to prevent damage to the bottom surface of the storage portion 10 and the lower surface of the flat plate portion 11b of the upper opening / closing portion 11.

[0074] In the stirring device 1 of this embodiment, when the stirring device 1 is shaken up and down, the end faces of the cylindrical portions 210 and 220, the upper and lower surfaces of the inner flat portions 212 and 222, and the upper and lower surfaces of the horizontal portions 216 and 226 of the first collision body 21 and the second collision body 22 can apply water pressure to the bottom surface of the storage portion 10 and the flat portion 11b of the upper opening / closing portion 11, and it becomes possible to diffuse the precipitate of protein powder on the bottom surface of the storage portion 10 and the protein powder adhering to the vicinity of the upper opening / closing portion 11. Moreover, since the lower part of the coil spring 20 exists near the bottom surface of the storage portion 10 where the precipitate is diffused, it becomes possible to position many winding portions of the coil spring 20 near the diffused precipitate, and the vibration of the coil spring 20 can be efficiently applied to the precipitate. In particular, as shown in FIGS. 4 and 5, in the case of the first collision body 21 having the bulging portion 212a and the second collision body 22 having the bulging portion 222a, since the area of the lower surface of the inner flat portion 212 and the upper surface of the inner flat portion 222 can be increased, it becomes possible to apply water pressure to the bottom surface of the storage portion 10 and the vicinity of the upper opening / closing portion 11 more efficiently, and it becomes possible to diffuse the precipitate near the bottom surface of the storage portion 10 and the adherent near the upper opening / closing portion 11. Further, since the long holes 214 and 224 are formed in the inner flat portions 212 and 222, when the first collision body 21 and the second collision body 22 move up and down, the precipitate near the bottom surface of the storage portion 10 and the adherent near the upper opening / closing portion 11 easily pass through the long holes 214 and 224 and move to the coil spring 20 side.

[0075] [Sieve permeability test] Next, the protein powder sieve permeability test using the stirring device 1 of this embodiment will be described. In this test, water and protein powder are put into the storage portion 10 of the stirring device 1, the stirring device 1 is shaken and stirred, and the mixed liquid is passed through a sieve mesh. Then, the time taken to pass through the sieve mesh and the weight of the protein powder adhering to the sieve mesh are measured. That is, it can be concluded that the finer the particles of the protein powder in the mixed liquid are by stirring, the shorter the time taken to pass through the sieve mesh and the less the weight of the protein powder adhering to the sieve mesh.

[0076] <Preparation> When conducting the protein powder sieve penetration test, in addition to the stirring device 1, Protein powder: 10 g, Water: 100 ml, Sieve: Square with a wire diameter of 0.16 mm and a mesh size of 0.50 mm, Timer, scale, are prepared.

[0077] <Test method> First, measure the weight of the sieve in advance. Put water and protein powder into the storage part 10, shake the storage part 10 up and down 10 times to stir. Then, transfer the protein solution in the storage part 10 to the sieve, and measure the time until the protein solution has completely penetrated the sieve. Next, after drying the sieve through which the protein solution has passed, measure the weight of the sieve. Then, by finding the difference between the weight of the sieve through which the protein solution has passed and the weight of the sieve before the protein solution has passed, the weight of the protein powder adhering to the sieve mesh can be obtained.

[0078] <Test results> As shown in FIG. 1, the above test was conducted for the case where the coil spring 20 was inserted into the storage part 10 and the entire coil spring 20 was slid and moved within the storage part 10 for stirring. This test is referred to as test (1). Also, as a comparative example, the above test was conducted for the case where one end of the coil spring 20 was attached to the opening of the storage part 10 and the coil spring 20 suspended in the storage part 10 was expanded and contracted for stirring, as shown in FIG. 11. This test is referred to as test (2). FIG. 9 is an explanatory diagram showing a comparison of the weight of the protein powder adhering to the sieve mesh in test (1) and test (2). FIG. 10 is an explanatory diagram showing a comparison of the sieve penetration time when the coil spring 20 is attached to the storage part 10 and when it is not attached. As a result of the above test, values as described below were obtained as shown in FIGS. 9 and 10. In FIGS. 9 and 10, the left side shows the results of test (2) and the right side shows the results of test (1), respectively.

[0079] <Test (1)> When the entire coil spring 20 is inserted into the storage part 10 (in this embodiment) Weight of the sieve after passing through the protein solution: 24.2252 g ··· (A) Weight of the sieve before passing through the protein solution: 24.1344 g ··· (B) Weight of the protein powder adhering to the sieve mesh: (A) - (B) = 0.0908 g Sieve passing time: 5.74 seconds

[0080] <Test (2)> When one end of the coil spring 20 is attached to the opening of the storage part 10 (comparative example) Weight of the sieve after passing through the protein solution: 23.0224 g ··· (A) Weight of the sieve before passing through the protein solution: 22.8229 g ··· (B) Weight of the protein powder adhering to the sieve mesh: (A) - (B) = 0.1995 g Sieve passing time: 6.04 seconds

[0081] FIG. 10 shows a photograph of the sieve surface after passing through the protein solution stirred in Tests (1) and (2). As is also clear from FIG. 10, it is obvious that the amount of protein powder adhering to the sieve through which the protein solution stirred in Test (1) passed is less than that of the sieve through which the protein solution stirred in Test (2) passed. Thus, as shown in FIG. 1, inserting the coil spring 20 into the storage part 10 and sliding and stirring the entire coil spring 20 within the storage part 10 results in smaller protein powder particles than attaching one end of the coil spring 20 to the opening of the storage part 10 as shown in FIG. 11 and stretching and contracting the coil spring 20 suspended within the storage part 10 for stirring.

[0082] In addition, the above test was conducted when the coil spring 20 was not attached to the storage part 10. The results are as follows. When the coil spring 20 is not attached to the storage part 10 Weight of the sieve after passing the protein solution: 23.5606 g ···(A) Weight of the sieve before passing the protein solution: 22.8644 g ···(B) Weight of the protein powder adhering to the sieve mesh: (A) - (B) = 0.6962 g Sieve passing time: 13.26 seconds Figure 12 shows the sieve surface after passing the protein solution stirred without attaching the coil spring 20 to the storage part 10. Comparing Figure 12 with Figure 10, more protein powder adheres to the sieve surface when the coil spring 20 is stored in the storage part 10 as in Tests (1) and (2) than when the coil spring 20 is not stored in the storage part 10. That is, the result that the particles of the protein powder become smaller was obtained when the coil spring 20 was attached.

[0083] As described above, as shown in Figure 1, inserting the coil spring 20 into the storage part 10 and sliding and stirring the entire coil spring 20 within the storage part 10 takes less time to pass through the sieve mesh and reduces the weight of the protein powder adhering to the sieve mesh compared to attaching one end of the coil spring 20 to the opening of the storage part 10 as shown in Figure 11 and expanding and contracting the coil spring 20 hanging in the storage part 10 for stirring. Therefore, by inserting the coil spring 20 into the storage part 10 and stirring, it becomes possible to make the particles of the protein powder in the protein solution finer. As a result, it becomes possible to provide a protein solution that is smooth to drink with reduced powdery feeling. The user can drink the protein solution in the storage part 10 from the upper cylindrical part 11c of the upper opening and closing part 11 by removing the cap part 12.

[0084] The embodiments of the present invention have been described above, but the embodiments of the present invention are not limited to those described above. For example, according to the above-described embodiment, making a protein solution by mixing protein powder with water was taken as an example for explanation, but it may be not only protein powder but also soft drink powder. Furthermore, it may be used to drink powdered pharmaceuticals. Also, even if it is a tablet, it may be put into the storage unit 10, dissolved in water to some extent, and then the stirring device 1 may be shaken up, down, left, and right. Note that the embodiments of the present invention are not limited to powder materials and can also be used to mix liquid materials with water.

Explanation of Signs

[0085] 1 Stirring device 10 Storage unit 10a Flat plate portion 10b Cylindrical portion 11 Upper opening / closing portion 11a Lower cylindrical portion 11b Flat plate portion 11c Upper cylindrical portion 12 Cap portion 13 Free spring portion 20 Coil spring 21 First collision body 22 Second collision body 21a, 22a Dents 210, 220 Cylindrical portions 210a, 220a Small protrusions 212, 222 Inner flat plate portions 212a, 222a Bulging portions 213, 223 Hole portions 214, 224 Long holes 215, 225 Wall surface portions 216, 226 Horizontal surface portions 217, 227 Side surface portions 218, 228 Notches

Claims

1. A stirring device that stores a substance to be dispersed and a liquid, and generates a liquid body in which the substance to be dispersed is dispersed in the liquid by shaking, comprising: a vertically extending storage portion that stores the substance to be dispersed and the liquid; an upper opening / closing portion provided at the upper part of the storage portion to open and close the opening of the storage portion for putting in the substance to be dispersed and the liquid and taking out the liquid body; a free spring portion stored inside the storage portion; The free spring portion: is stored inside the storage portion, has a constant winding diameter, has a dense pitch at the central portion, and has a sparse pitch at both side portions of the central portion, and includes a coil spring; the height of the coil spring is shorter than the height of the storage portion, the outer diameter of the coil spring is shorter than the inner diameter of the storage portion, and when the storage portion is shaken in the vertical direction, the coil spring is slidable along the vertical direction inside the storage portion. The stirring device is characterized by this.

2. The free spring portion: further includes a first collision body attached to the upper end portion of the coil spring; and a second collision body attached to the lower end portion of the coil spring; When the storage portion is shaken, the second collision body collides with the bottom surface of the storage portion, and the first collision body collides with the lower surface of the upper opening / closing portion. The stirring device according to claim 1 is characterized by this.

3. The first collision body and the second collision body have the same shape. The first collision body and the second collision body: include a cylindrical portion into which an end portion of the coil spring can be inserted inside; a donut-shaped flat plate portion extending from the upper end of the cylindrical portion toward the central axis of the cylindrical portion; and a fan-shaped recess formed at a corner portion between the cylindrical portion and the flat plate portion. The recess: includes a wall surface portion extending vertically along the central axis from a part of a central hole portion formed at the central portion of the flat plate portion; a horizontal surface portion extending from the end portion of the wall surface portion to the cylindrical portion; a pair of side surface portions extending along the circumferential direction both sides of the horizontal surface portion from the circumferential direction both sides of the wall surface portion; and a notch portion formed by notching the root portion of the horizontal surface portion and the cylindrical portion in the pair of side surface portions. The notch portion has a notch width through which an end portion of the coil spring can be inserted. The stirring device according to claim 2 is characterized by this.

4. A plurality of protruding portions protruding downward are formed on the lower end surface of the cylindrical portion. The stirring device according to claim 3 is characterized by this.

5. The stirring device according to claim 3, characterized in that a plurality of bulging portions bulging toward the central axis of the cylindrical portion are formed on the inner end surface of the flat plate portion.

6. The stirring device according to claim 3, 4 or 5, characterized in that a plurality of hole portions are formed on the flat plate surface of the flat plate portion.

7. A free spring that is inserted into the inside of a container body having a vertically extending storage portion for storing a substance to be dispersed and a liquid, and an upper opening / closing portion provided at the upper portion of the storage portion for opening and closing the opening of the storage portion, and generates a liquid body in which the substance to be dispersed is dispersed in the liquid by shaking the container body. A coil spring having a constant winding diameter, a dense pitch at the central portion, and a sparse pitch at both sides of the central portion. A first collision body attached to the upper end portion of the coil spring. A second collision body attached to the lower end portion of the coil spring, characterized in that the free spring is provided with the second collision body.

Images