CN107822477B

CN107822477B - Juice extractor

Info

Publication number: CN107822477B
Application number: CN201711250875.7A
Authority: CN
Inventors: 金再垣
Original assignee: Megumi Corp
Current assignee: Hurom Group Corp
Priority date: 2013-09-06
Filing date: 2014-09-05
Publication date: 2021-01-29
Anticipated expiration: 2034-09-05
Also published as: KR200480611Y1; WO2015034319A1; KR20150001135U; CN105658117A; CN105658117B; CN107822477A; HK1250615A1

Abstract

The present invention relates to a juice extractor, wherein a driving shaft filling member is provided to surround a circumference of a driving shaft protruding from a body portion so as to prevent juice from flowing down the driving shaft and into the body portion, and the driving shaft filling member is provided at a bottom of a central shaft of a screw so as to prevent juice from flowing down the central shaft of the screw and out of a bottom of a housing. A juice extractor according to a preferred embodiment of the present invention includes: a main body part in which a driving motor is built such that a driving shaft protrudes to the outside; a housing detachably attached to a top of the main body portion and separately forming a juice discharge port and a residue discharge port on one side of the housing; a screw rotatably installed inside the housing, and connected to the driving shaft and rotated, thereby juicing the juiced substances to be juiced from inside the housing, which have been inserted inside the housing; a mesh drum which is installed to surround the screw in the housing and which separates the juice from the residue; a cover portion which is detachably coupled to the housing and in which an inlet through which a substance from which juice is to be extracted is inserted is formed; a driving shaft packing member coupled to a circumference of the driving shaft protruding from the main body and having a bottom contacting an outer surface of the main body to prevent juice from flowing into the main body; and a screw shaft filling member which is connected to a circumference of a central shaft of the screw and whose bottom contacts an inner surface of the housing to prevent juice from flowing out to an outside of the housing.

Description

Juice extractor

The present application is a divisional application of the invention patent application with application number 201480058373.2 entitled "juicer".

Cross Reference to Related Applications

This application is part of national phase application 371 of international application PCT/KR2014/008408 filed on 5.9.2014, the contents of which are incorporated herein by reference in their entirety.

Technical Field

The present invention relates to a juice extractor. More particularly, the present invention relates to a juice extractor which extracts juice from a juice extracting object placed in a housing using a rotary feed screw, and then the juice and the residue are separated from each other and discharged to the outside.

Background

Recently, as people have been increasingly interested in health, they have tended to use juice extractors at home to extract juice directly from vegetables, fruits, etc. and to drink the extracted juice. In response to this trend, various juice extractors have been developed, which can extract juice from vegetables or fruits in a simple and convenient manner at home.

The juice extractor is configured to extract juice from a juice extraction object (e.g., vegetables, fruits, etc.) thrown into a housing using a feed screw rotatably driven by a drive motor of a main body, and then to allow the juice and residues to be separated from each other by a mesh drum so as to be discharged to the outside. An example of the juice extractor is disclosed in korean patent laid-open application nos. 10-2006-0101848 and 10-2012-0029640 and korean patent registration No. 10-0755440.

Fig. 1 is an exploded perspective view illustrating a juice extractor according to the related art, and fig. 2 is a sectional view illustrating a juice extractor according to the related art.

The juice extractor 100 according to the related art includes: a main body part 110 in which a driving motor 115 is installed, the driving motor 115 having a driving shaft 115a formed to protrude upward from the driving motor; a housing 120 detachably mounted on the main body 110 and including a juice outlet 121 and a residue outlet 123, the juice outlet 121 and the residue outlet 123 being formed at lower ends thereof in such a manner as to be spaced apart from each other by a predetermined angular distance; a feed screw 130 rotatably installed at the center of the housing 120 in such a manner as to be connected to the driving shaft 115a of the main body 110, so as to extract juice from a juice extracting object put into the housing 120 when rotated; a mesh drum 140 installed inside the housing 120 in such a manner as to surround the feed screw 130, and configured to separate juice and residue from each other and discharge the separated juice and residue to the outside; and a cover part 150 detachably connected at a lower end thereof to the upper end of the case 120 and the upper end of the mesh drum 140, the cover part having an inlet 151 formed at one side of an upper part thereof.

Herein, the body portion 110 includes: a base 111 that is open at the top and is formed in a box shape; a cover portion 113 connected to an upper end portion of the base portion 11, the cover portion having a seating portion 113a formed on a top surface thereof, a through hole 113b formed at a center of the cover portion, and a pair of

packing support rings

113c and 113d provided at a lower portion of the through hole 113 b; a drive motor 115 disposed inside the base 11 and having a drive shaft 115a protruding upward from the drive motor through a through hole 113 b; a pair of driving

shaft fillers

117a and 117b interposed between the

filling support rings

113c and 113d of the cap portion 113 and the driving shaft 115a and configured to prevent juice from flowing into the main body portion 10 along the driving shaft 115 a.

Reference numeral 119 denotes a fastening member facing material for covering and covering the fastening member that engages the base portion 111 and the lid portion 113 with each other.

The main body part 110 of the juice extractor 100 according to the related art as described above includes the driving

shaft fillers

117a and 117b to prevent juice from flowing into the main body part 110 while moving down along the driving shaft 115a, but it is also inevitable to have a problem that the driving

shaft fillers

117a and 117b are only post-processing filling means to prevent juice from flowing further into a gap defined between the through hole 113b and the driving shaft 115a in a state where juice has been introduced into the gap.

In addition, the main body part 110 of the juice extractor 100 according to the related art as described above includes a disadvantage in that, because the contact area between the driving

shaft fillings

117a and 117b and the driving shaft 115a is large during the rotation of the driving shaft 115a, there is a high risk of abrasion and thermal deformation of the driving

shaft fillings

117a and 117b occurring, and thus juice flowing out of the gap between the through hole 113b and the driving shaft 115a is likely to flow into the main body part 110 after passing through the driving

shaft fillings

117a and 117 b.

Also, the main body part 110 of the juice extractor 100 according to the related art as described above includes the screw filling member 133, the screw filling member 133 being disposed between the bottom surface of the housing 120 and the central rotational shaft 131 of the feed screw 130, but still suffers from a disadvantage in that, since the central rotational shaft 131 of the feed screw 130 needs to be rotatably coupled with the screw shaft filling member 133, juice is likely to flow out of the housing 120 and thus into the main body 110 while moving downward along the central rotational shaft 131 of the feed screw 130.

Disclosure of Invention

Technical problem

Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a juice extractor configured to include a drive shaft filling member mounted on an outer circumference of a drive shaft formed to protrude upward from a main body so that juice can be prevented from flowing into the main body while moving downward along the drive shaft.

It is another object of the present invention to provide a juice extractor configured to include a screw shaft filling member mounted on an upper outer circumference of a central rotating shaft of a feed screw so as to be capable of preventing juice from flowing downward out of a housing while moving downward along the central rotating shaft of the feed screw.

Technical solution

In order to achieve the above object, according to an embodiment of the present invention, there is provided a juice extractor including: a main body part mounted with a driving motor having a driving shaft formed to protrude upward from the driving motor; a housing detachably mounted to the main body and including a juice outlet and a residue outlet formed at a lower end thereof in such a manner as to be spaced apart from each other by a predetermined angular distance; a feed screw rotatably installed at an inner center of the housing in such a manner as to be connected to a driving shaft of the main body so as to extract juice from a juicing object put into the housing when rotated; a mesh drum installed inside the housing in a manner of surrounding the feed screw, and configured to separate juice and residue from each other; and a cover part detachably connected to the case and having an inlet formed at one side of an upper part thereof to allow the juicing objects to be put into the case through the inlet; and a drive shaft filling member connected to an outer circumference of the drive shaft at an upper side thereof, the drive shaft being formed to protrude upward from the main body portion and abut against a top surface of the main body portion at a lower end portion thereof so as to prevent juice from flowing into the main body portion.

According to a preferred feature of the invention, the drive shaft filler may be formed in an umbrella shape extending radially downward and outward from an upper side of the drive shaft filler connected to an outer periphery of the drive shaft so that only a lower end portion of the drive shaft filler abuts the top surface of the main body portion.

According to a preferred feature of the invention, the contact area between the drive shaft filler and the drive shaft is larger than the contact area between the drive shaft filler and the main body portion, and the drive shaft filler is integrally rotatable together with the drive shaft.

According to a preferred feature of the invention, an upper side of the drive shaft filler may be in surface contact with an outer circumference of the drive shaft, and a lower end portion of the drive shaft filler is in line contact with a top surface of the main body portion in an annular shape.

According to a preferred feature of the present invention, the main body portion may have a downward slope formed on a top surface thereof in a shape gradually inclined downward in a radially outward direction around the drive shaft.

According to a preferred feature of the present invention, the main body part may have an annular protruding step part which extends protrudingly upward from a radially inner circumferential end of a downward inclined part formed on a top surface of the main body part around the driving shaft 13 to prevent juice from flowing into the main body part.

According to another embodiment of the present invention, there is provided a juice extractor including: a main body part mounted with a driving motor having a driving shaft formed to protrude upward from the driving motor; a housing detachably mounted to the main body and including a juice outlet and a residue outlet formed at lower end portions thereof in such a manner as to be spaced apart from each other by a predetermined angular distance; a feed screw rotatably installed at an inner center of the housing in such a manner as to be connected to a driving shaft of the main body so as to extract juice from a juicing object put into the housing when rotated; a mesh drum installed inside the housing in a manner of surrounding the feed screw, and configured to separate juice and residue from each other; and a cover part detachably connected to the case and having an inlet formed at one side of an upper part thereof to allow the juicing objects to be put into the case through the inlet; and a screw shaft filling member which is connected to an upper outer periphery of the central rotating shaft 31 of the feed screw at an upper side thereof and abuts with an inner bottom surface of the housing at a lower end portion thereof so as to prevent juice from flowing out of the housing.

According to a preferred feature of the present invention, the screw shaft filler may be formed in a bell shape which extends radially downward and outward from an upper side of the screw shaft filler connected to a lower outer periphery of the center rotational shaft so that a lower end portion of the screw shaft filler abuts against an inner bottom surface of the housing.

According to a preferred feature of the present invention, a contact area between the screw shaft filler and the central rotational shaft of the feed screw may be smaller than a contact area between a lower end portion of the screw shaft filler and an inner bottom surface of the housing, and the screw shaft filler may not rotate together with the central rotational shaft of the feed screw.

According to a preferred feature of the present invention, an upper side of the screw shaft filler may be in line contact with an outer circumference of the central rotating shaft in a ring shape, and a lower end portion of the screw shaft filler may be in contact with an inner bottom surface of the housing.

According to a preferred feature of the present invention, the housing may have an annular projecting step portion which extends protrudingly upward from a radially inner peripheral end portion of the inner bottom surface of the housing about the central rotational axis of the feed screw to prevent juice from flowing downward out of the housing when moving downward along the central rotational axis of the feed screw.

According to still another embodiment of the present invention, there is provided a juice extractor including: a main body part mounted with a driving motor having a driving shaft formed to protrude upward from the driving motor; a housing detachably mounted to the main body and including a juice outlet and a residue outlet formed at lower end portions thereof in such a manner as to be spaced apart from each other by a predetermined angular distance; a feed screw rotatably installed at an inner center of the housing in such a manner as to be connected to a driving shaft of the main body so as to extract juice from a juicing object put into the housing when rotated; a mesh drum installed inside the housing in a manner of surrounding the feed screw, and configured to separate juice and residue from each other; a cover part detachably connected to the case and having an inlet formed at one side of an upper part thereof to allow a juicing object to be put into the case through the inlet; a drive shaft filling member connected to an outer circumference of the drive shaft at an upper side thereof, the drive shaft being formed to protrude upward from the main body portion and abut against a top surface of the main body portion at a lower end portion thereof so as to prevent juice from flowing into the main body portion; and a screw shaft filling member which is connected to an upper outer periphery of the central rotation shaft of the feed screw at an upper side thereof and abuts against an inner bottom surface of the housing at a lower end portion thereof so as to prevent juice from flowing out of the housing.

Advantageous effects

The juice extractor according to an embodiment of the present invention has the following benefits:

first, a driving shaft filling member is installed at an outer circumference of the driving shaft, and the driving shaft is formed to protrude upward from the main body part, thereby preventing juice from flowing into the main body part while moving downward along the driving shaft.

Second, the drive shaft filler is formed in an umbrella shape extending radially downward and outward from an upper side of the drive shaft filler connected to the outer circumference of the drive shaft so that only the lower end portion of the drive shaft filler 60 abuts the top surface of the main body portion. Thus, the juice is not introduced into the main body portion, but flows down along the top surface of the driving shaft filling member while moving down along the driving shaft. In particular, when the driving shaft rotates, the driving shaft filling member 60 also rotates together with the driving shaft, so that the juice is pushed outward from the driving shaft filling member by a centrifugal force.

Third, the main body part has a downward inclined part formed on the top surface of the main body part in a shape gradually inclined downward in a radially outward direction around the drive shaft, and an annular protruding step part extending upward protrudingly from a radially inner circumferential end part of the downward inclined part formed on the top surface of the main body part around the drive shaft, so that even if juice flows into a gap defined between the lower end part of the drive shaft packing and the top surface of the main body part due to abrasion or thermal deformation of the drive shaft packing, it is naturally drained to the outside in a radially outward direction when moving downward along the downward inclined part. In addition, even if the juice moves upward along the downward slope, it is prevented from flowing into the main body portion by the annular projecting step portion.

Fourth, the lower end portion of the drive shaft filler is in line contact with the top surface of the main body portion in an annular shape, so that although the drive shaft filler rotates together with the drive shaft, the contact area between the lower end surface of the drive shaft filler and the top surface of the main body portion is relatively small, and thus the risk of wear or thermal deformation of the drive shaft filler is significantly reduced, so that the durability of the drive shaft filler is greatly increased. In addition, even if juice collects around the lower end portion of the drive shaft filling member, it is prevented from penetrating into the main body portion along the gap defined between the lower end portion surface of the drive shaft filling member and the top surface of the main body portion.

The juice extractor according to another embodiment of the present invention has the following benefits:

first, a screw shaft filling member is installed on an upper outer circumference of a central rotating shaft of the feed screw so as to prevent juice from flowing downward out of the housing while moving downward along the central rotating shaft of the feed screw.

Second, the screw shaft packing is formed in a bell shape which extends radially downward and outward from an upper side of the screw shaft packing connected to a lower outer periphery of the center rotational shaft so that a lower end portion of the screw shaft packing abuts against an inner bottom surface of the housing. Therefore, the juice does not flow down out of the housing while moving down along the central rotational axis of the feed screw, but flows down along the top surface of the screw shaft filling member.

Third, the housing has an annular projecting step portion which projects upwardly from a radially inner peripheral end portion of the inner bottom surface of the housing around the central rotational axis of the feed screw, so that even if juice flows into a gap defined between a lower end portion of the screw shaft filling member and the inner bottom surface of the housing due to wear and deformation of the screw shaft filling member, it is prevented from flowing downwardly out of the housing along the central rotational axis of the feed screw by the annular projecting step portion.

Fourth, the upper side of the screw shaft packing is in line contact with the outer circumference of the central rotating shaft in an annular shape, so that although the screw shaft packing does not integrally rotate with the central rotating shaft of the feed screw, the contact area between the screw shaft packing and the central rotating shaft of the feed screw is relatively small, and thus the risk of abrasion or thermal deformation of the screw shaft packing can be significantly reduced, so that the durability of the screw shaft packing is greatly increased.

A juice extractor according to a further embodiment of the present invention has all the effects of the juice extractor according to the above-described embodiment of the present invention.

Drawings

The above objects, other features and advantages of the present invention will become apparent from the following description of preferred embodiments thereof, taken in conjunction with the accompanying drawings, in which:

fig. 1 is an exploded perspective view illustrating a juice extractor according to the related art;

fig. 2 is a sectional view showing a juice extractor according to the related art;

fig. 3 is an exploded perspective view illustrating a juice extractor according to an embodiment of the present invention;

fig. 4 is a sectional view illustrating a juice extractor according to an embodiment of the present invention;

figure 5 shows a cross-sectional view of a juice extractor according to another embodiment of the invention;

figure 6 shows a cross-sectional view of a juice extractor according to a further embodiment of the invention.

Reference numerals for the main components in the drawings illustrate:

1. 1', 1 ": juice extractor

10: main body part

11: driving motor

15: downwardly inclined part

17. 25: annular projecting step portion

20: shell body

21: juice outlet

23: residue outlet

30: feed screw

31: central rotating shaft

40: net-shaped cylinder

50: cover part

60: drive shaft packing

70: screw shaft filling piece

Detailed Description

Now, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Matters such as detailed configurations and components defined in the description are nothing more than specific details provided to assist those skilled in the art in a comprehensive understanding of the present invention, and the present invention is not limited to the embodiments disclosed below.

In addition, in the description, the thickness of a line or the size of a part shown in the drawings may be exaggerated for clarity and convenience of description. Further, terms to be discussed below are defined in consideration of the result and operational consideration of the present invention, but may be changed according to the intention or specification of a user or operator or the reality. Therefore, they should be defined based on the entire scope of the present invention.

Fig. 3 is an exploded perspective view illustrating a juice extractor according to an embodiment of the present invention, and fig. 4 is a sectional view illustrating a juice extractor according to an embodiment of the present invention.

The juice extractor 1 according to the embodiment of the present invention is intended to prevent juice from flowing into the main body 10 while moving down the driving shaft 13.

As shown in fig. 3 and 4, the juice extractor 1 includes: a main body part 10 in which a driving motor 11 is installed, the driving motor 11 having a driving shaft 13, the driving shaft 13 being formed to protrude upward from the driving motor; a housing 20 detachably mounted to the main body 10 and including a juice outlet 21 and a residue outlet 23, the juice outlet 21 and the residue outlet 23 being formed at a lower end portion of the housing 20 in such a manner as to be spaced apart from each other by a predetermined angular distance; a feed screw 30 rotatably installed at an inner center of the housing 20 in such a manner as to be connected to the driving shaft 13 of the main body 10, so as to extract juice from a juicing object put into the housing 20 when rotated; a mesh drum 40 installed inside the housing 20 in such a manner as to surround the feed screw 30, and configured to separate juice and residue from each other; and a cover part 50 detachably coupled to the case 20 and having an inlet 51 formed at one side of an upper part thereof to allow a juicing object to be put into the case therethrough; and a drive shaft filling member 60 which is connected to an outer circumference of the drive shaft 13 at an upper side thereof (the drive shaft 13 is formed to protrude upward from the main body 10) and abuts a top surface of the main body 10 at a lower end thereof so as to prevent juice from flowing into the main body 10 while moving downward along the drive shaft 13.

Here, the main body portion 10 corresponds to a support base that generates a driving force for rotationally driving the feed screw 30 and supports the lower portion of the housing 20. A driving motor 11 is installed in the main body portion 10, and the driving motor 11 has a driving shaft 13 formed to protrude upward from the driving motor.

In addition, although not shown in the drawings, an electric wire is electrically connected to the main body portion 10 so as to supply electric power to the driving motor 11, and an operation switch is provided on the main body portion 10 to select an operation mode of the driving motor 11 based on a decision of whether or not to operate the driving motor 11. The main body 10 internally includes a controller that drives the operation of the motor 11 in response to the operation control of the operation switch.

The housing 20 is detachably mounted on the main body 10. The housing 20 has an inner space defined therein to allow a juicing operation of the juicing object by combining the feed screw 30 and the mesh drum 40. The housing 20 includes a juice outlet 21 through which juice is discharged and a residue outlet 23 through which residue is discharged, and the juice outlet 21. The juice outlet 21 and the residue outlet 23 are formed at a lower end portion of the housing 20 in such a manner as to be spaced apart from each other by a predetermined angular distance.

The feed screw 30 is rotatably installed at the inner center of the housing 20. The feed screw 30 is connected to the driving shaft 13 of the main body 10, and moves the juicing object put in the housing 20 by slowly applying pressure to the juicing object while being rotated, so as to extract juice from the juicing object by combining the feed screw 30 and the mesh drum 40. Subsequently, the residue from which the juice is filtered out is forcibly conveyed to the residue outlet 23. The feed screw 30 is configured as a vertical screw having a spiral groove 33, and the spiral groove 33 is formed on an outer circumferential surface of the vertical screw. In addition, the feed screw 30 includes a plurality of helical threads 34 protrudingly formed on an outer circumferential surface thereof.

The lower end portion of the central rotation shaft 31 of the feed screw 30 is connected to the drive shaft 13 protruding upward from the main body 10 so that it rotates integrally with the drive shaft 123. The upper end portion of the central rotating shaft 31 of the feed screw 30 is rotatably connected to the lower side of the cover portion 50, which will be described below.

The mesh cylinder 42 is mounted inside the housing 20 so as to surround the feed screw 30. The mesh drum 40 allows only juice to pass therethrough and does not allow residue to pass therethrough, so that the juice is separately discharged to the outside through the juice outlet 21 and the residue is separately discharged to the outside through the residue outlet 23, respectively. The mesh drum 40 has a plurality of mesh holes formed on a sidewall thereof.

Also, an upper end portion of the mesh drum 40 is detachably connected to a lower surface of a cover portion 50, which will be described later, and a lower end portion of the mesh drum 40 is connected to a ring-shaped engagement protrusion formed to protrude upward from an inner bottom surface of the case 20.

The cover 50 is detachably attached to the upper end of the housing 20. An inlet 51 is protrudingly formed at one side of an upper portion of the cover 50, and an upper end portion of the mesh drum 40 is detachably connected to a bottom surface of the cover 50.

In the main body part 10, the housing 20, the feed screw 30, the mesh drum 40, and the lid part 50 are all basic components constituting the juice extractor 1 as described above, and thus detailed description thereof will be omitted, and only structural differences from the prior art components will be described in detail hereinafter.

The drive shaft filler 60 is connected at an upper side thereof to an outer circumference of the drive shaft 13, and the drive shaft 13 is formed to protrude upward from the main body 10. The driving shaft filling member 60 serves to prevent juice from flowing into the main body 10 while moving down the driving shaft 13. The drive shaft filler 60 is formed in an umbrella shape extending radially downward and outward from an upper side of the drive shaft filler 60 connected to the outer circumference of the drive shaft 13 so that only a lower end portion of the drive shaft filler 60 abuts against the top surface of the main body portion 10. Preferably, in order to couple the driving shaft packing member 60 to the driving shaft 13, a packing coupling groove 13a is formed on an outer circumferential surface of the driving shaft 13, and the driving shaft 13 is formed to protrude upward from the main body part 10.

In the juice extractor 1 according to the embodiment of the present invention, the drive shaft filling member 60 is mounted on the outer circumference of the drive shaft 13 formed to protrude upward from the main body 10, and at the same time, the drive shaft filling member 60 is formed in an umbrella shape extending radially downward and outward from the upper side of the drive shaft filling member 60 connected to the outer circumference of the drive shaft 13 so that only the lower end portion of the drive shaft filling member 60 abuts the top surface of the main body 10. Therefore, if juice flows out of the mesh drum, it is not introduced into the main body 10 while moving down along the driving shaft 13, but flows down along the top surface of the driving shaft filling member 60.

In addition, it is preferable that a contact area between the drive shaft filler 60 and the drive shaft 13 is larger than a contact area of the lower end portion of the drive shaft filler 60 abutting the top surface of the main body part 10, so that the drive shaft filler 60 can rotate together with the drive shaft 13 due to a difference in frictional force according to the contact area between the drive shaft filler 60 and the drive shaft 13.

For this, it is preferable that the upper side of the driving shaft filler 60 is in line contact with the outer circumferential surface of the driving shaft 13, and the lower end of the driving shaft filler 60 is in line contact with the top surface of the main body 10 in a ring shape.

In this case, when the driving shaft 13 rotates, the driving shaft filling member 60 also rotates together with the driving shaft 13, so that the juice is pushed outward from the driving shaft filling member 60 by a centrifugal force, and thus the juice is prevented from flowing into the main body part 10 while moving downward along the driving shaft 13.

Further, only the lower end portion of the driveshaft filler 60 is in line contact with the top surface of the main body portion 10 in an annular shape, so that although the driveshaft filler 60 rotates together with the driveshaft 13, the contact area between the lower end portion surface of the driveshaft filler 60 and the top surface of the main body portion 10 is relatively small, and thus the risk of wear and thermal deformation of the driveshaft filler 60 can be significantly reduced, resulting in a great increase in the durability of the driveshaft filler 60. In addition, although juice is gathered around the lower end portion of the drive shaft filling member 60, it is prevented from infiltrating into the main body portion 10 along the gap defined between the lower end portion surface of the drive shaft filling member 60 and the top surface of the main body portion 10.

In addition, it is preferable that the main body portion 10 has a downward inclination portion 15 formed on a top surface thereof in a shape gradually inclined downward in a radially outward direction around the driving shaft 13. In this way, although juice flows into the gap defined between the lower end portion of the drive shaft filling member 60 and the top surface of the main body portion 10 due to abrasion or thermal deformation of the drive shaft filling member 60, it can be naturally drained to the outside in the radially outward direction when moving downward along the downward inclined portion 15, so that juice can be prevented from flowing into the main body portion 10.

Also, the main body part 10 has an annular protruding step part 17, the annular protruding step part 17 extending protrudingly upward from a radially inner peripheral end of the downward inclined part 15, the downward inclined part 15 being formed on a top surface of the main body part around the driving shaft 13 to eventually prevent juice from flowing into the main body part. In this case, even if juice flows into a gap defined between the lower end portion of the drive shaft filling member 60 and the top surface of the main body portion 10 due to abrasion or thermal deformation of the drive shaft filling member 60, it can be naturally drained to the outside in the radially outward direction while moving downward along the downward inclined portion 15, and in addition, even if juice moves obliquely upward along the downward inclined portion 15, it is finally prevented from flowing into the main body portion 10 by the annular protruding step portion 17.

Fig. 5 is a sectional view illustrating a juice extractor according to another embodiment of the present invention.

As shown in fig. 5, a juice extractor 1' according to another embodiment of the present invention is intended to prevent juice from flowing out of a housing while moving downward along a central rotational shaft 31 of a feed screw 30.

As shown in fig. 5, the juice extractor 1' includes: a main body part 10 to which a driving motor 11 is mounted, the driving motor 11 having a driving shaft 13, the driving shaft 13 being formed to protrude upward from the driving motor; a housing 20 detachably mounted to the main body 10 and including a juice outlet 21 and a residue outlet 23, the juice outlet 21 and the residue outlet 13 being formed at a lower end portion of the housing 20 in such a manner as to be spaced apart from each other by a predetermined angular distance; a feed screw 30 rotatably installed at an inner center of the housing 20 in such a manner as to be connected to the driving shaft 13 of the main body 10, so as to extract juice from a juicing object put into the housing 20 when rotated; a mesh drum 40 installed inside the housing 20 in such a manner as to surround the feed screw 30, and configured to separate juice and residue from each other; a cover part 50 detachably coupled to the case 20 and having an inlet 51 formed at one side of an upper part thereof to allow a juicing object to be put into the case through the inlet; and a screw shaft filling member 70 which is connected to a lower outer circumference of the central rotation shaft 31 of the feed screw 30 at an upper side thereof and abuts with an inner bottom surface of the housing 20 at a lower end thereof so as to prevent juice from flowing out of the housing 20.

Here, the above-described main body 10, housing 20, feed screw 30, mesh drum 40 and lid 50 are basic components constituting the juice extractor 1', and thus detailed description thereof will be omitted, and only the structure different from the components of the related art will be described in detail hereinafter.

As described above, the screw shaft filler 70 is connected to the central rotation shaft 31 of the feed screw 30. The screw shaft filling member 70 serves to prevent juice from flowing out of the housing 20. The screw shaft filler 70 is formed in a bell shape which extends radially downward and outward from an upper side of the screw shaft filler 70 connected to a lower outer circumference of the center rotary shaft 31 so that a lower end portion of the screw shaft filler 70 abuts against an inner bottom surface of the housing 20. Preferably, in order to connect the screw shaft filling member 70 to the central rotating shaft 31, a filling connection groove 31a is formed on an outer circumferential surface of the central rotating shaft 31.

In the juice extractor 1' according to another embodiment of the present invention, the screw shaft filling member 70 is installed on the outer circumference of the central rotating shaft 31 of the feed screw 30, and at the same time, the screw shaft filling member 70 is formed in a bell shape which extends radially downward and outward from the upper side of the screw shaft filling member 70 connected to the lower outer circumference of the central rotating shaft 31 so that the lower end portion of the screw shaft filling member 70 abuts against the inner bottom surface of the housing 20. Therefore, if juice flows out of the mesh drum, it does not flow downward out of the housing while moving downward along the central rotating shaft 31, but flows downward along the top surface of the screw shaft filling member 70.

In addition, it is preferable that a contact area between the screw shaft filler 70 and the central rotational shaft 31 of the feed screw 30 is smaller than an area of a lower end portion of the screw shaft filler 70 abutting against the inner bottom surface of the housing 20, so that the screw shaft filler 70 does not rotate together with the central rotational shaft 31 of the feed screw 30 due to a difference in friction force according to the contact area between the screw shaft filler 70 and the central rotational shaft 31. For this, it is preferable that the upper side of the screw shaft filling member 70 is in line contact with the outer circumference of the central rotating shaft 31 in an annular shape, and the lower end portion of the screw shaft filling member 70 is in contact with the inner bottom surface of the housing 20.

The upper side of the screw shaft filling member 70 is in line contact with the outer circumference of the central rotating shaft 31 of the feed screw 30, in particular, with the filling connection groove 31a, the filling connection groove 31a constituting an "E" shape as shown in fig. 5 at a total of three positions.

In this case, the upper side of the screw shaft packing 70 is in line contact with the outer circumference of the central rotating shaft 31 in an annular shape, so that although the screw shaft packing 70 does not integrally rotate with the central rotating shaft 31 of the feed screw 30, the contact area between the screw shaft packing 70 and the central rotating shaft 31 of the feed screw 30 is relatively small, and thus the risk of abrasion and thermal deformation of the screw shaft packing 70 can be significantly reduced, so that the durability of the screw shaft packing 70 can be greatly increased.

In addition, it is preferable that the housing 20 has an annular protruding step 25 protrudingly extending upward from a radially inner peripheral end portion of the inner bottom surface of the housing 20 around the central rotational shaft 31 of the feed screw 30 to eventually prevent juice from flowing downward out of the housing 20 when moving downward along the central rotational shaft 31 of the feed screw 30.

In this case, even if juice flows into a gap defined between the lower end portion of the screw shaft filling member 70 and the inner bottom surface of the housing 20 due to abrasion or deformation of the screw shaft filling member 70, it is finally prevented from flowing out of the housing 20 downward along the central rotation shaft 31 of the feed screw 30 by the annular projecting step portion 25, so that the juice can be prevented from flowing into the main body portion 10.

Fig. 6 is a sectional view illustrating a juice extractor according to still another embodiment of the present invention.

As shown in fig. 6, the juice extractor 1 ″ according to still another embodiment of the present invention is intended to prevent juice from flowing into the main body 10 while moving downward along the driving shaft 13, and at the same time prevent juice from flowing out of the housing and thus into the main body 10 while moving downward along the central rotational shaft 31 of the feed screw 30.

As shown in fig. 6, the juice extractor 1 ″ includes: a main body part 10 in which a driving motor 11 is installed, the driving motor 11 having a driving shaft 13, the driving shaft 13 being formed to protrude upward from the driving motor; a housing 20 detachably mounted to the main body 10 and including a juice outlet 21 and a residue outlet 23, the juice outlet 21 and the residue outlet 13 being formed at a lower end portion of the housing 20 in such a manner as to be spaced apart from each other by a predetermined angular distance; a feed screw 30 rotatably installed at an inner center of the housing 20 in such a manner as to be connected to the driving shaft 13 of the main body 10, so as to extract juice from a juicing object put into the housing 20 when rotated; a mesh drum 40 installed inside the housing 20 in such a manner as to surround the feed screw 30, and configured to separate juice and residue from each other; and a cover part 50 detachably coupled to the case 20 and having an inlet 51 formed at one side of an upper part thereof to allow a juicing object to be put into the case through the inlet; a drive shaft filling member 60 connected to an outer circumference of the drive shaft 13 at an upper side thereof, the drive shaft 13 being formed to protrude upward from the main body 10 and abut a top surface of the main body 10 at a lower end thereof so as to prevent juice from flowing into the main body 10 while moving downward along the drive shaft 13; and a screw shaft filling member 70 which is connected to a lower outer circumference of the central rotation shaft 31 of the feed screw 30 at an upper side thereof and abuts with an inner bottom surface of the housing 20 at a lower end thereof so as to prevent juice from flowing out of the housing 20.

Here, the above-described main body 10, housing 20, feed screw 30, mesh drum 40 and lid 50 are basic components constituting the juice extractor 1 ″, and thus detailed description thereof will be omitted for the sake of brevity, and only the structure different from the components of the related art will be described in detail hereinafter.

The drive shaft filler 60 is connected at an upper side thereof to an outer circumference of the drive shaft 13 formed to protrude upward from the main body 10. The driving shaft filling member 60 serves to prevent juice from flowing into the main body 10 while moving down the driving shaft 13. The drive shaft filler 60 is formed in an umbrella shape extending radially downward and outward from an upper side of the drive shaft filler 60 connected to the outer circumference of the drive shaft 13 so that only a lower end portion of the drive shaft filler 60 abuts against the top surface of the main body portion 10. Preferably, in order to couple the driving shaft packing member 60 to the driving shaft 13, a packing coupling groove 13a is formed on an outer circumferential surface of the driving shaft 13 formed to protrude upward from the main body part 10.

In the juice extractor 1 ″ according to still another embodiment of the present invention, the drive shaft filling member 60 is installed at the outer circumference of the drive shaft 13 formed to protrude upward from the main body 10, and at the same time, the drive shaft filling member 60 is formed in an umbrella shape extending radially downward and outward from the upper side of the drive shaft filling member 60 connected to the outer circumference of the drive shaft 13 so that only the lower end portion of the drive shaft filling member 60 abuts the top surface of the main body 10. Therefore, if juice flows out of the mesh drum, it is not introduced into the main body 10 while moving down along the driving shaft 13, but flows down along the top surface of the driving shaft filling member 60.

In addition, it is preferable that a contact area between the drive shaft filler 60 and the drive shaft 13 is larger than a contact area of the lower end portion of the drive shaft filler 60 abutting the top surface of the main body part 10, so that the drive shaft filler 60 can rotate together with the drive shaft 13 due to a difference in frictional force according to the contact area between the drive shaft filler 60 and the drive shaft 13. For this, it is preferable that the upper side of the driving shaft filler 60 is in line contact with the outer circumferential surface of the driving shaft 13, and the lower end of the driving shaft filler 60 is in line contact with the top surface of the main body 10 in a ring shape.

In this case, when the driving shaft 13 rotates, the driving shaft filling member 60 also rotates together with the driving shaft 13, so that the juice is pushed outward from the driving shaft filling member 60 by centrifugal force, and thus the juice is prevented from flowing into the main body 10 while moving downward along the driving shaft 13.

Further, only the lower end portion of the driveshaft filler 60 is in line contact with the top surface of the main body portion 10 in an annular shape, so that although the driveshaft filler 60 rotates together with the driveshaft 13, the contact area between the lower end portion surface of the driveshaft filler 60 and the top surface of the main body portion 10 is relatively small, and thus the risk of wear and thermal deformation of the driveshaft filler 60 can be significantly reduced, so that the durability of the driveshaft filler 60 can be greatly increased. In addition, although juice is gathered around the lower end portion of the drive shaft filling member 60, it is prevented from infiltrating into the main body portion 10 along the gap defined between the lower end portion surface of the drive shaft filling member 60 and the top surface of the main body portion 10.

In addition, it is preferable that the main body part 10 has a downward inclination part 15 formed on a top surface thereof in a shape gradually inclined downward in a radially outward direction. In this way, even if juice flows into the gap defined between the lower end portion of the drive shaft filling member 60 and the top surface of the main body portion 10, it can be naturally drained to the outside in the radially outer direction while moving downward along the downward sloping portion 15, so that juice can be prevented from flowing into the main body portion 10.

Also, the main body part 10 has an annular protruding step part 17, and the annular protruding step part 17 is protrudingly extended upward around the driving shaft 13 from a radially inner circumferential end of the downward inclined part 15 formed on the top surface of the main body part to finally prevent juice from flowing into the main body part. In this case, even if juice flows into the gap defined between the lower end portion of the drive shaft filling member 60 and the top surface of the main body portion 10 due to abrasion or thermal deformation of the drive shaft filling member 60, it can be naturally drained to the outside in the radially outward direction when moving downward along the downward slope 15. In addition, even if the juice moves obliquely upward along the downward inclined portion 15, it is finally prevented from flowing into the main body portion 10 by the annular projecting step portion 17.

In the juice extractor 1' according to another embodiment of the present invention, the screw mounting packing 70 is mounted on the outer circumference of the central rotating shaft 31 of the feed screw 30, and at the same time, the screw shaft packing 70 is formed in a bell shape which extends radially downward and outward from the upper side of the screw shaft packing 70 connected to the lower outer circumference of the central rotating shaft 31 so that the lower end portion of the screw shaft packing 70 abuts against the inner bottom surface of the housing 20. Therefore, if juice flows out of the mesh drum, it does not flow downward out of the housing while moving downward along the central rotating shaft 31, but flows downward along the top surface of the screw shaft filling member 70.

The upper side of the screw shaft filling member 70 is in line contact with the outer circumference of the central rotation shaft of the feed screw 30, in particular, with the inner side of the filling connection groove 31a, and the filling connection groove 31a constitutes an "E" shape as shown in fig. 5 at a total of three positions.

In this case, the upper side of the screw shaft filler 70 is in line contact with the outer circumference of the central rotating shaft 31 in an annular shape, so that although the screw shaft filler 70 does not integrally rotate together with the central rotating shaft 31 of the feed screw 30, the contact area between the screw shaft filler 70 and the central rotating shaft 31 of the feed screw 30 is relatively small, and thus the risk of abrasion and thermal deformation of the screw shaft filler 70 can be significantly reduced, so that the durability of the screw shaft filler 70 can be greatly increased.

In addition, it is preferable that the housing 20 has an annular protruding step portion 25, and the annular protruding step portion 25 is extended to protrude upward from a radially inner circumferential end portion of the inner bottom surface of the housing 20 around the central rotational shaft 31 of the feed screw 30 to finally prevent juice from flowing downward out of the housing 20 when moving downward along the central rotational shaft 31 of the feed screw 30.

In this case, even if the juice flows into the gap defined between the lower end portion of the screw shaft filling member 70 and the inner bottom surface of the housing 20, it is finally prevented from flowing out of the housing 20 downward along the central rotation shaft 31 of the feed screw 30 by the annular projecting step portion 25, so that the juice can be prevented from flowing into the main body portion 10.

Although the present invention has been described in connection with the specific embodiments shown in the drawings, they are merely illustrative, and the present invention is not limited to these embodiments. It is to be understood that various equivalent modifications and variations of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, the actual technical scope of the present invention should not be limited by the above-described embodiments, but should be defined by the appended claims and equivalents thereof.

Claims

1. A juicer, comprising:

a main body part in which a driving motor having a driving shaft formed to protrude upward from the driving motor is mounted;

a housing detachably mounted to the main body and including a juice outlet and a residue outlet formed at a lower end thereof at a predetermined angular distance from each other;

a feed screw rotatably installed at an inner center of the housing in such a manner as to be connected to a driving shaft of the main body part, so as to extract juice from a juicing object put into the housing when rotated;

a mesh drum installed inside the housing in a manner of surrounding the feed screw, and configured to separate juice and residue from each other;

a cover part detachably coupled to the case and having an inlet formed at one side of an upper part thereof to allow a juicing object to be put into the case through the inlet; and

a screw shaft filling member which is connected to an upper outer periphery of a central rotation shaft of the feed screw at an upper side thereof and abuts with an inner bottom surface of the housing at a lower end thereof so as to prevent juice from flowing out of the housing,

wherein the screw shaft filler is formed in a bell shape extending radially downward and outward from an upper side of the screw shaft filler connected to a lower outer circumference of a center rotational shaft so that a lower end portion of the screw shaft filler abuts against an inner bottom surface of the housing,

wherein an upper side of the screw shaft packing is in line contact with an outer circumference of a central rotation shaft in an annular shape, and a lower end portion of the screw shaft packing is in surface contact with an inner bottom surface of the housing.

2. The juice extractor of claim 1, wherein a contact area between the screw shaft filling member and the central rotational shaft of the feed screw is smaller than a contact area between a lower end portion of the screw shaft filling member and an inner bottom surface of the housing, and the screw shaft filling member does not rotate together with the central rotational shaft of the feed screw.

3. The juice extractor of claim 1, wherein the housing has an annular projecting step portion extending from a radially inner circumferential end of an inner bottom surface of the housing to project upward around a central rotational axis of the feed screw to prevent juice from flowing downward out of the housing when moving downward along the central rotational axis of the feed screw.

4. A juicer, comprising:

a cover part detachably coupled to the case and having an inlet formed at one side of an upper part thereof to allow a juicing object to be put into the case through the inlet;

a drive shaft filling member connected to an outer circumference of the drive shaft at an upper side thereof, the drive shaft being formed to protrude upward from the main body portion, and abutting a top surface of the main body portion at a lower end thereof so as to prevent juice from flowing into the main body portion; and

wherein a filling coupling groove for coupling the screw shaft filling member is formed on an outer circumferential surface of the central rotating shaft.