JP2005168559A - Hand mixer and attachment of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hand mixer and an attachment of the same in which agitating work can be effectively completed in a short time even in the case of agitating while gripping the hand mixer, the weight of the hand mixer does not become burden to a housewife, and a substance to be agitated can be effectively and evenly agitated even when agitating the substance using an agitating container such as a bowl with relatively shallow bottom and a widely formed upper surface. <P>SOLUTION: The attachment includes rotation shafts connected to a driving device, and at least two agitating impellers connected to the rotation shafts, middle portions between upper end portions and lower end portions of the respective agitating impeller swell out so as to be separated from the rotation shafts, and the respective impellers are constituted such that the upper end portions are twisted relative to the lower end portions by rotating the upper end portions by a predetermined angle on the rotation shafts. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hand mixer mainly used at home and an attachment used therefor.

An attachment of a conventional hand mixer is formed in a bowl shape with an elongated metal plate as a whole, and each rotary blade is formed in a U shape with an elongated metal plate (see, for example, Patent Document 1). The stirring blade device includes a blade support member attached in a plane orthogonal to the rotation axis direction, and a plate-like stirring blade attached to the blade support member apart from the rotation shaft. The blade support member side mounting end of the blade is inclined with respect to the central axis of the blade support member in a plane orthogonal to the rotation axis, and some of the stirring blades are inclined with respect to the plane orthogonal to the rotation axis. (For example, refer to Patent Document 2).
JP-A-9-37969 JP-A-9-155176

  The four individual rotating blades of Patent Document 1 have shapes formed by bending a long and narrow metal plate into a U-shape. For stirring at the time of cooking in a general household, a stirring container such as a fairly large bowl is usually used for the stirring blades. For this reason, the stirring main part, which is the vertical portion of the U-shape, rotates so as to cut the object to be stirred, so that only the vicinity thereof is stirred. Therefore, in order to stir uniformly, it is necessary to use the hand blade while moving the stirring blades uniformly throughout the stirring vessel. However, it is a burden for ordinary housewives to carry out stirring work while holding a heavy hand mixer. Therefore, the present invention has an object to provide a hand mixer and its attachment that can finish stirring work efficiently and in a short time even when stirring while holding a hand mixer, and does not cause a burden on housewives or the like. To do. It is another object of the present invention to provide a hand mixer and its attachment that can uniformly stir the object to be stirred even when stirring is performed with the hand mixer placed.

  In the stirring blade of Patent Document 2, since the stirring blade is inclined, an upward flow or a downward flow can be generated in the object to be stirred depending on the rotation direction of the stirring blade. As shown in the drawing of Patent Document 2, the stirring blade having such a configuration can be stirred effectively when the stirring vessel is deep. However, in this Patent Document 2, since the entire stirring blade is inclined at the same angle and the flow generated in the object to be stirred is always directed in a certain direction, it is like a bowl having a relatively shallow bottom and a wide upper surface. When used in a stirring container, excellent efficiency cannot be obtained for stirring the entire object to be stirred in the stirring container. Accordingly, an object of the present invention is to provide a hand mixer capable of efficiently and uniformly stirring an object to be stirred even when stirring in a stirring vessel such as a bowl having a relatively shallow bottom and a wide upper surface, and an attachment thereof. .

  Claim 1 of the present invention is an attachment comprising a rotating shaft connected to a driving device and at least two stirring blades attached to the rotating shaft, and each stirring blade is between its upper end and lower end. The agitating blade bulges away from the rotation axis, and each stirring blade is twisted so that its upper end is rotated at a predetermined angle around the rotation axis with respect to the lower end. A hand mixer with two such attachments attached.

  Claim 2 is a structure in which the twist direction of each stirring blade in Claim 1 is the same, and Claim 8 is a structure in which all the stirring blades of one attachment are twisted in the same direction. It is a hand mixer. Further, claim 9 is the hand mixer according to claim 8, wherein the twisting directions of the stirring blades of the two attachments are different, and claim 10 is a hand mixer, wherein the twisting directions of the stirring blades of the two attachments are the same. It is a hand mixer.

  According to a third aspect of the present invention, there is provided an element in which two stirring blades form a single annular body, and the two stirring blades are formed symmetrically about a rotation axis extending in the radial direction of the annular body. The configuration is limited to the second aspect, and the eleventh aspect is a configuration in which the limited elements of such an attachment are limitedly added to the seventh to tenth aspects.

  According to a fourth aspect of the present invention, an element in which the predetermined rotation angle of the twist of the stirring blade is 10 to 100 degrees is limitedly added to the first to third aspects. The limiting elements are limitedly added to the seventh to eleventh aspects.

  According to a fifth aspect of the present invention, the stirring blade has a non-twisted portion, and the non-twisted portion extends outward from the upper end portion and the lower end portion of the stirring blade by a predetermined length. The element in which the stirring blade is twisted by twisting the portion is a structure added limitedly to the first to fourth aspects. The thirteenth aspect is a configuration in which the limited elements of such an attachment are limitedly added to the seventh to twelfth aspects.

  Claim 6 has a configuration in which the non-twisted portion extends horizontally outwardly, and claim 14 has a configuration in which a limited element of such an attachment is limitedly added to claim 13.

  In the fifteenth aspect, the element that the two attachments have the same number of stirring blades is added to the seventh to fourteenth aspects in a limited manner. In the sixteenth aspect, there is an element in which the rotation regions of the respective stirring blades of the two attachments are partially common, and one of the rotation blades rotates so as to fall between the other two rotation blades in the common rotation region. This configuration is limited to the seventh to fifteenth aspects.

  According to the first aspect of the present invention, each stirring blade is twisted so that its upper end is rotated by a predetermined angle around the rotation axis with respect to the lower end. The stirring blade is usually formed of a metal plate, and as a special case, one in which two or three metal wires are arranged, or one in which more metal wires are arranged in a plate shape is used. Since the stirring blade is twisted, a twisted surface is always formed between the upper end portion and the lower end portion of the stirring blade. Therefore, the fact that the rotating blades are twisted surfaces means that the rotating blades are inclined with respect to the rotation direction and hit the object to be stirred so that they can be efficiently stirred. Stirring is literally stirring the object to be stirred, for example, mixing egg yolk and egg white to some extent. On the other hand, in certain cooking, it is not enough to stir the agitated material and mix it to some extent. For example, it is necessary to mix several types of agitated materials such as mayonnaise so that they become one thing. In some cases. The first aspect of the present invention can be performed efficiently even when the material to be stirred is completely mixed. Furthermore, it can be efficiently performed when foaming egg white. Claim 7 can also obtain the same effect.

  In the second aspect, the twisting directions of the respective stirring blades are the same. The upper twisted surface and the lower twisted surface with the middle between the upper end portion and the lower end portion of the stirring blade are inclined in opposite directions with respect to the rotation direction of the stirring blade. Accordingly, the object to be stirred flows to either the outside or the inside of the rotary blade by the upper twist surface, and the object to be stirred flows to the opposite side of the upper twist surface by the lower twist surface. As a result, the material to be stirred flowing inside is surrounded by the stirring blades and efficiently mixed, and the material to be stirred flowing to the outside stirs the material to be stirred near the inner surface of the stirring vessel as a reflective action. Since it is pushed away toward the center of the container, it can be stirred uniformly. An eighth aspect of the present invention is a hand mixer in which all the rotary blades for one attachment are twisted in the same direction. Therefore, an effect similar to that of the second aspect can be obtained.

  A ninth aspect of the present invention is the hand mixer according to the eighth aspect, wherein the twist directions of the stirring blades of the two attachments are different. Two attachments of a normal hand mixer rotate in opposite directions. Therefore, the upper torsional surfaces of both attachments act so that the object to be stirred flows on the same side, either outside or inside the rotary blade, and the lower torsional surface causes the object to be stirred to flow on the opposite side. Act on. As a result, the object to be stirred flows to either the outside or the inside of the rotary blade when the two attachments are at the same height, and the object to be stirred flows to the opposite side at the other position of the same height. As a result, the material to be stirred flowing inside the stirring blades is efficiently and sufficiently mixed with the material to be stirred inside the stirring blades of the other attachments, and the material to be stirred flowing outside the stirring blades of both attachments. As a reflective action of the object, the object to be stirred in the vicinity of the inner surface of the stirring vessel is strongly pushed toward the center of the stirring vessel, so that it can be uniformly and efficiently stirred.

  A tenth aspect of the present invention is the hand mixer according to the eighth aspect, wherein the twisting directions of the stirring blades of the two attachments are the same. As described above, the two attachments of a normal hand mixer rotate in opposite directions. Therefore, at the same height, one attachment acts so that the agitated material flows inside the rotating blades, and the other acts so that the agitated material flows outside the rotating blades. When stirring and mixing an object to be stirred such as mayonnaise with a high viscosity, the stirring object on the inside of the rotating blade does not move well, so mixing cannot be performed efficiently, but the object to be stirred flows from the outside by the rotating blade of the other attachment. Therefore, the to-be-stirred object inside a rotary blade can be forced to move, and can be mixed efficiently.

  According to a third aspect of the present invention, the two stirring blades form a single annular body, and the two stirring blades are symmetrically formed around a rotation axis extending in the radial direction of the annular body. With such a configuration, even if the individual stirring blades are not twisted, one straight metal plate, which is the basis of the two stirring blades, is twisted or twisted, and both ends thereof are respectively connected to the rotating shafts. Since it is possible to obtain a twisted rotary blade, it is easy to manufacture. Claim 11 can also obtain the same effect. The ring-shaped body includes not only a ring rubber that is connected continuously without a break, but also an element that originally bends an elongated member into a ring shape and joins both ends so that there is no gap. Or what made the cut | notch in a part of annular body formed like them is also contained.

  In the fourth aspect, the predetermined rotation angle of the twist of the stirring blade is 10 to 100 degrees. A twist in this range can be efficiently stirred and mixed. The same effect can be obtained in the twelfth aspect.

  According to a fifth aspect of the present invention, the stirring blade has a non-twisted portion, and the non-twisted portion extends outward from the upper end portion and the lower end portion of the stirring blade by a predetermined length. The stirring blade is twisted by twisting the part. Therefore, since the stirring main portion extending substantially in the vertical direction of the stirring blade performs the stirring action, the object to be stirred is mainly stirred by the movement in the horizontal direction. Further, the stirring main part is separated from the rotation axis by a predetermined distance due to the presence of the non-twisted part. As a result, when the stirring vessel has a relatively shallow bottom and a wide upper surface, such as a bowl, the object to be stirred can be moved widely, so that stirring can be performed efficiently. Claim 13 can also obtain the same effect.

  The sixth aspect is a configuration in which the non-twisted portion extends horizontally outward. Therefore, the stirring blade is U-shaped or close to the shape, and the stirring main portion extends substantially in the vertical direction to perform the stirring action. Therefore, the object to be stirred is stirred mainly by moving in the horizontal direction. Can be obtained. Claim 14 can also obtain the same effect.

  In the fifteenth aspect, each of the two attachments has the same number of stirring blades. Usually, the two attachments are configured to rotate in opposite directions. Therefore, in order to rotate the two attachment blades so that the rotation regions of the respective stirring blades are partially in common, the rotation blades are rotated so that one rotation blade enters between the other two rotation blades in the common rotation region. Therefore, the rotating blades of both attachments do not hit.

  According to a sixteenth aspect of the present invention, the rotation regions of the stirring blades of the two attachments are partially common, and one of the rotation blades rotates so as to enter between the other two rotation blades in the common rotation region. The stirring object that has flowed into the inside by the stirring blade is mixed, but the stirring blade of the other attachment enters the stirring object being mixed, so that the stirring object can be mixed very efficiently. it can.

  Next, the best mode for carrying out the invention will be described. In the attachment 1, four stirring blades 3, 3, 4 and 4 are attached to a rotating shaft 2 connected to a motor of a hand mixer. Since the stirring blade 3 and the stirring blade 4 are formed in the same manner, the stirring blade 3 will be described below. One stirring blade 3 bulges away from the rotating shaft 2 with the upper end portion 5 and the lower end portion 6 as base points, and this bulging portion performs a stirring action. From the state where the upper end portion 5 and the lower end portion 6 face the same direction when the stirring blade 3 is viewed from above, the lower end portion 6 is fixed and the upper end portion 5 is substantially counterclockwise about the rotation axis. Twisted as if rotated 45 degrees. Of course, the rotation angle is not limited to 45 degrees, and an angle between 40 degrees and 50 degrees is desirable, but any angle within the range of 10 degrees to 100 degrees may be used. Of course, the rotation of the twist of the upper end portion 5 may be clockwise. The number of stirring blades is preferably four, but is not limited to this, and may be 2 to 8 blades.

  The stirring blade 3 has horizontal non-twisted portions 7 and 8 extending outward from the upper end portion 5 and the lower end portion 6 over a predetermined length. Therefore, twisting of the stirring blade 3 occurs in the stirring main portion 9 extending in the longitudinal direction between the portions other than the non-twisted portion and the non-twisted portions 7 and 8. In this embodiment, the length from the upper end portion 5 to the lower end portion 6 is 70 mm. However, the length is not limited to this value, and may be in the range of 15 to 200 mm. The stirring main part 9 literally performs the stirring action literally, but since the stirring main part 9 is separated from the rotation axis by the length of the non-twisted parts 7 and 8, the stirring action can be performed in a wide range. As shown in FIG. 2, the stirring main portion 9 is preferably formed so as to bulge outwardly in a circular arc shape and bulge to the maximum at the upper and lower central portions, but the present invention is not limited to this. For example, the largest bulged portion may be above or below the central portion. In this embodiment, the distance from the rotation axis to the maximum bulging portion is 22 mm, and this numerical value is preferable. However, the distance is not limited to this, and may be in the range of 8 to 100 mm. The degree of swelling may be constant and the stirring main portion 9 may be formed to extend straight in the vertical direction.

  As described above, the main stirring portion 9 is twisted, and as shown in FIGS. 4 and 6, the horizontal straight lines 12 and 13 drawn from the rotation axis to the centers of the upper partial cross section 10 and the lower partial cross section 11 of the main stirring portion. On the other hand, the cross sections 10, 11 are inclined. Further, the inclination directions of both cross sections 10 and 11 are opposite to the rotation direction of the attachment 1. Therefore, for example, when the attachment 1 rotates clockwise, the upper part of the stirring main part 9 acts so that the non-stirring material flows inside the stirring blade 3, and the lower part of the stirring main part 9 holds the object to be stirred. It acts to flow outside the stirring blade 3.

  As described above, the upper partial cross section 10 and the lower partial cross section 11 are inclined with respect to the rotation direction of the attachment 1, but as shown in FIG. 5, a horizontal straight line drawn from the rotation axis to the center of the central partial cross section 14 of the stirring blade. The central partial section 14 is at a right angle to 15.

  The pair of agitating blades 3 and 3 are formed by bending an elongated metal plate into an annular shape, and the lower end portions 6 and 6 of the rotating blades 3 and 3 attached to the rotating shaft 2 are integrally continuous and the upper end. The parts 5 and 5 are each fixed to the rotary shaft 2 independently. Several methods for twisting the rotary blade 3 are conceivable. For example, first, the center of a straight and long metal plate is fixed to the tip of the rotating shaft 2. At that time, the other pair of rotating blades 4, 4 are overlapped with the rotating blades 3, 3 so as to form a cross shape and fixed to the tip of the rotating shaft 2. For example, a thin protrusion protrudes from the tip of the rotary shaft 2, and the protrusion is fitted into a fitting hole provided in the center of the elongated metal plate, and the head of the protrusion protruding from the fitting hole is crushed and fixed. . Then, the metal plate is bent into a shape in which substantially the same U-shape faces as before the pair of rotary blades 3 and 3 are twisted. At this time, the upper end portion 5 and the lower end portion 6 of the rotary blade 3 face in the same direction when viewed from above. Thereafter, the upper end portion 5 is rotated counterclockwise around the rotation axis while the rotation shaft 2 and the lower end portion 6 fixed to the tip thereof are fixed, and then fixed to the rotation shaft 2. As a method of fixing the upper end portion 5 to the rotary shaft 2, welding or brazing is used. As a result, the rotating blade 3 is twisted.

  As described above, another method of twisting the rotary blades 3 and 3 is to fix the rotary blades 3 and 3 and the rotary blades 4 and 4 at the center so as to form a cruciform shape and fix them to the rotary shaft 2. Next, only twisting is applied without bending the rotary blade 3. The rotating blade is bent upward so that the rotating blade bulges with respect to the rotating shaft 2 while being twisted, and is fixed to the rotating shaft 2 so that the upper end portion 5 of the rotating blade is horizontal. Apart from this, the upper end 5 of the rotating blade may be fixed to the rotating shaft 2 while simultaneously twisting and bending. As a result, the rotating blade 3 naturally twists as if the upper end portion 5 was rotated with respect to the lower end portion 6, so that a desired rotating blade can be obtained.

  FIG. 7 shows a hand mixer 16 equipped with two attachments 1 and 15. The hand mixer 16 has a built-in motor, and the attachment rotates by connecting the rotation shaft 2 of the attachment to a drive shaft that transmits the power of the motor. Reference numeral 19 denotes a motor switch. The rotating blades 3 and 4 of the attachment 1 are all twisted in the same direction, and the rotating blades 17 and 18 of the attachment 15 are all twisted in the opposite direction to the rotating blades 3 and 4. Attachment 1 and attachment 15 rotate in opposite directions during use. The rotating blades 4 and 18 between the two rotating shafts 2 and 2 are drawn so as to overlap between the rotating shafts 2 and 2 as shown in FIG. This is because the rotation region caused by the rotation of the rotating blades 3 and 4 and the rotation region of the rotating blades 17 and 18 partially overlap each other, and the rotating blades of one attachment are between the two rotating blades of the other attachment. Means to rotate to enter. Of course, the attachments may be set apart so that the two rotation regions do not overlap.

  FIG. 8 shows the usage state of the hand mixer 16. The hand mixer 16 can be used in a state of being supported diagonally by using the table 20. The cradle 20 is formed in a rectangular box shape with an open top, and the butt portion 21 of the butt portion 21 is supported so that the butt portion 21 of the hand mixer can be inserted into the cradle 20 to support the hand mixer in an oblique state. A support plate portion 22 having a narrow width according to the shape is integrally provided on the inner surface of both side plate portions 23 of the pedestal. The support plate portion 22 is substantially V-shaped so as to fit the outer shape of the bottom portion 21 of the hand mixer as shown by the dotted line in FIG. 8, and the lower step portions 26 and 26 of the hand mixer hit the support plate portion 22. The hand mixer 1 is supported. Further, the cradle 20 has a width that allows the bottom 21 of the hand mixer to be inserted.

  The V-shaped part of the support plate portion 22 of the table further extends until reaching the upper end of the table 20, and further extends horizontally from there to the front end and the rear end of the table 20, respectively. An end support plate portion 25 is formed. When the hand mixer 16 is not used, the attachment 1 is removed and the hand mixer 16 is placed on the front end support plate portion 24 and the rear end support plate portion 25 for storage. At this time, since the cradle 20 can be used as a storage container for accessories, the detached attachment 1, the bowl support 28, and the like are stored in the cradle 20.

  When the hand mixer is used obliquely on the table 20, the lower steps 26 and 26 of the hand mixer are supported on the support plate 22 as described above. Since the bowl 27 has a round bottom, the bowl 27 is placed on a bowl support 28 having a concave support surface 30 adapted to its shape. In order to prevent the bowl 27 placed on the support surface 30 of the bowl support from slipping, an elastomer anti-slip piece is fixed. As shown in FIG. 8, the bowl 27 may be used obliquely or may be used by placing it straight. The lowest point 31 of the concave support surface 30 is biased to the right of the center of the support surface 30 in FIG. 8 so that the bowl 27 is stable when placed obliquely. When the attachment 1 is rotated, the switch 19 may be operated by grasping the grip portion 29 with a hand. As shown in FIG. 8, the hand mixer 16 can be placed on the table 20 and the bowl 27 can be placed at an angle. If used in this way, the rotating blades enter the bowl 27 obliquely and the height of the entire rotating blade is lower than that in the vertical case, so that the entire rotating blade is immersed in the object to be stirred and efficiently stirred. Can do. Of course, the method of use is not limited to this, and the hand mixer may be lifted by hand.

Attachment perspective view Front view of attachment AA sectional view in FIG. BB sectional view in FIG. CC sectional view in FIG. DD sectional view in FIG. Side view of hand mixer with attachment Partial cross-sectional front view showing the state of use of the hand mixer

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Attachment 2 Rotating shaft 3 Agitation blade 4 Agitation blade 5 Upper end part 6 Lower end part 7 Non-twisted part 8 Non-twisted part 9 Stirring main part 10 Upper partial cross section 11 Lower partial cross section 12 Horizontal straight line 13 Horizontal straight line 14 Central partial cross section 15 Attachment 16 Hand mixer 17 Rotating blade 18 Rotating blade 19 Switch 20 Stand 21 Bottom portion 22 Support plate portion 23 Side plate portion 24 Front end support plate portion 25 Rear end support plate portion 26 Lower step portion 27 Bowl 28 Bowl support 29 Handle portion 30 Support surface 31 Bottom point

Claims (16)

A rotating shaft coupled to the driving device; and at least two stirring blades attached to the rotating shaft, and each stirring blade bulges so that a middle portion between the upper end portion and the lower end portion thereof is separated from the rotation axis. Each of the stirring blades is twisted so that the upper end thereof is rotated at a predetermined angle around the rotation axis with respect to the lower end. The attachment according to claim 1, wherein the twisting directions of the respective stirring blades are the same. The attachment according to claim 1 or 2, wherein the two stirring blades form one annular body, and the two stirring blades are formed symmetrically about a rotation axis extending in a radial direction of the annular body. The attachment according to any one of claims 1 to 3, wherein a predetermined rotation angle of the twist of the stirring blade is 10 to 100 degrees. The stirring blade has a non-twisted portion, and this non-twisted portion extends outward from the upper end and lower end of the stirring blade by a predetermined length, and the main stirring portion between the two non-twisted portions is twisted. The attachment according to claim 1, wherein the stirring blade is twisted. The attachment according to claim 5, wherein the non-twisted portion extends horizontally outward. A hand mixer having two attachments each having a stirring blade, wherein each attachment has at least two stirring blades attached to each attachment, and each stirring blade has a middle portion between the upper end portion and the lower end portion thereof separated from the rotation axis. And each stirring blade is twisted so that the upper end of each stirring blade is twisted so as to be rotated by a predetermined angle about the rotation axis with respect to the lower end. 8. The hand mixer according to claim 7, wherein the stirring blades are twisted in the same direction with respect to one attachment to which the stirring blade is attached. The hand mixer according to claim 8, wherein the twist directions of the stirring blades of the two attachments are different. The hand mixer according to claim 8, wherein the twist directions of the stirring blades of the two attachments are the same. 11. The hand mixer according to claim 7, wherein two stirring blades attached to the attachment are formed in one annular body, and two stirring blades are formed on both sides of a rotation axis extending in the radial direction of the annular body. 12. The hand mixer according to claim 7, wherein a predetermined rotation angle of the twist of the stirring blade is 10 to 100 degrees. The stirring blade has a non-twisted portion, and this non-twisted portion extends outward from the upper end and lower end of the stirring blade by a predetermined length, and the main stirring portion between the two non-twisted portions is twisted. 13. The hand mixer according to claim 7, wherein the stirring blade is twisted. The hand mixer according to claim 13, wherein the non-twisted portion extends horizontally outward. 15. The hand mixer according to claim 7, wherein each of the two attachments has the same number of stirring blades. 16. The rotation region of each stirring blade of each of the two attachments is partially common, and in the common rotation region, one rotary blade rotates so as to enter between the other two rotary blades. Hand mixer

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