KR200493891Y1 - Jucer - Google Patents

Abstract

The present invention relates to a juicer, and the juicer according to the present invention includes a main body including a drive shaft protruding upward, an upper opening to form an inlet for inputting materials, a juice outlet for discharging juice from the material, and The residue outlet for discharging the remaining residues is formed to be spaced apart from the outside, and it includes a housing mounted on the upper portion of the main body and a screw disposed at a lower end inside the housing, coupled with the driving shaft to rotate, and the screw includes a rotating shaft. It comprises a screw body rotating around the center and one or more screw threads protruding from the outer circumferential surface of the screw body and inputted through the inlet to crush, press, and transport the material positioned between the inlet and the screw to produce juice do it with

Description

Juicing machine {JUCER}

The present invention relates to a juicer, and more particularly, to a juicer that produces juice by pressing and pulverizing vegetables or fruits.

For health, the case of making green juice or juice directly at home is increasing, and for this purpose, a lot of devices have been disclosed for simply extracting juice from vegetables or fruits at home.

Conventionally, the juicer puts the ingredients in the inlet and crushes them by a blade rotating at high speed to make juice by centrifugation. However, in the process of high-speed crushing of these juicers, the inherent taste and nutrients of ingredients may be destroyed, it is difficult to make green juice with vegetables made from stems or leaves, and it is difficult to make juice from fruits such as kiwi or strawberries with high viscosity. No, it was impossible to make soy milk from soybeans.

In order to solve this problem, Republic of Korea Patent No. 10-0793852 discloses a method of compressing and pulverizing a material between a mandrel and a screw rotating at low speed, using the principle of grinding and pressing beans with a millstone to make soy milk. There is an effect of making juice by grinding and pressing fruits with high viscosity such as tomatoes, kiwis, and strawberries on a grater, and thus it is possible to solve the problems of the conventional juicer as described above.

However, even in this case, there was a inconvenience of having to cut the material finely in advance before putting the material into the inlet due to the size of the inlet manufactured so that the material of an appropriate size is inserted according to the size of the screw and the size of the screw.

Accordingly, Korean Patent Registration No. 10-1270140 discloses that the size of the inlet is enlarged and the material with a large size is crushed in advance by the crushing part and the crushing part to supply the crushed material to the eccentric side of the screw upper part. It was made possible to juice a large material without increasing the size.

However, even in this case, the inlet that does not deviate from the structure of the conventional juicer that fixedly supports the upper and lower ends of the screw rotation shaft so that a large-sized material is inserted protrudes outward from an eccentric position to one side rather than the upper center of the screw As a result, there was a problem in that the shape of the juicer was enlarged and complicated, and further, there was a problem in that the configuration of crushing the material before squeezing, such as a paring part and a crushing part, became complicated.

Republic of Korea Patent No. 10-0793852 Republic of Korea Patent Registration No. 10-1270140

Therefore, the object of the present invention is to solve the problems of the related art, and even if only the lower end of the rotating shaft of the screw is supported without a structure supporting the upper end of the rotating shaft of the screw, the radius of the screw supplied to the open inlet on the screw is larger than the radius of the screw It is to provide a juicer capable of crushing, conveying and squeezing large ingredients.

The problems to be solved by the present invention are not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

The above object, according to the present invention, a body including a drive shaft protruding upwards; a housing having an open upper portion to form an inlet for inputting a material, a juice outlet for discharging juice extracted from the material and a residue outlet for discharging the remaining residues, the housing being mounted on the upper portion of the main body; and a screw disposed at the lower end of the housing and rotating in combination with the drive shaft, wherein the screw is formed to protrude on the outer peripheral surface of the screw body and the screw body rotating about the rotation shaft, and is introduced through the inlet. This may be accomplished by a juicer comprising an inlet and one or more screw threads for crushing, compressing and conveying the intervening material to produce juice.

Here, in the screw, any one of the screw threads may be formed to extend above the screw body in the form of a spiral.

Here, the housing includes a lower housing in which the screw is disposed therein to separate the material into juice and residue by compression, and the juice outlet and the residue outlet are spaced apart from each other on the outside; and an upper housing coupled to the upper portion of the lower housing and having a screw thread extending above the screw body therein, and forming a space in which the material input from the upper open inlet is located.

Here, the juice drum is disposed between the housing and the screw to surround the screw, and an outlet hole is formed for extracting the juice produced by pressing and transferring the material by rotation of the screw to the outside to separate it from the residue. may include more.

Here, the juice drum may include: an inner module including an inner plate part having both ends open, and a plurality of slits formed in the inner plate part; and an outer module including an outer plate portion for accommodating the inner module in a detachable manner, and a rib protruding from an inner surface of the outer plate portion to be inserted into a slit of the inner plate portion, wherein the outer module includes the inner module A gap may be formed between the slit and the rib, which is an outlet hole for discharging the juice to the outside when surrounding and coupled.

Here, the screw includes a first module including a plurality of slits; and a second module detachably coupled to the first module and including a rib inserted into the slit, wherein, when the first module and the second module are coupled, between the rib and the slit A gap may be formed to introduce the juice separated from the outside into the inside.

Here, the juice drum is disposed between the housing and the screw to surround the screw, and an outlet hole is formed for extracting the juice produced by pressing and transferring the material by rotation of the screw to the outside to separate it from the residue. Further comprising, the lower end of the upper housing may be formed with a pressing step or a pressing protrusion to press and fix the upper end of the juice drum.

Here, one or more crushing locking jaws may be formed on the inner surface of the housing to crush the material by interacting with the screw thread protruding in the longitudinal direction and extending above the screw body.

Here, in the screw, any one of the screw threads is formed to extend to the upper end of the screw body in the form of a spiral, and the screw threads of the upper end of the screw body are formed to protrude horizontally in the radial direction of the screw body to remove the material. can be crushed.

Here, the inner surface of the housing may form a space away from the screw thread formed at the upper end of the screw body.

Here, the housing may be formed such that the cross-sectional area formed by the inner surface of the housing increases from the portion where the upper end of the screw is located to the upper portion.

Here, the separation space may be formed on an eccentric side of the housing.

Here, the cross-sectional area of the screw body decreases from the lower part to the upper part, but extends to an eccentric side to form a grinding space for grinding the material input from the upper part.

Here, a grinding blade may be formed extending from the screw body toward the grinding space to grind the material injected into the grinding space.

According to the juicer of the present invention as described above, there is an advantage in that even a material having a size larger than the radius of the screw can be directly injected and juiced without the hassle of cutting the material in advance.

In addition, since juice can be performed while rotating the screw without supporting the upper end of the screw rotation shaft, a material having a size larger than the radius of the screw is fed through the inlet opened above the screw, thereby making the housing more compact and simple. There is also the advantage of being able to.

In addition, it solves the problem of clogging of the mesh hole in the existing mesh drum, and has the advantage of being easy to clean.

1 is a cross-sectional view of a juicer according to a first embodiment of the present invention.
2 and 3 are perspective views of the screw according to the first embodiment of the present invention shown in FIG.
FIG. 4 is a plan view of FIG. 2 .
Fig. 5 is a side view of Fig. 2 from various angles;
6 is a perspective view of a screw according to a modification of FIG. 2 .
FIG. 7 is a plan view of FIG. 6 .
Fig. 8 is a side view of Fig. 6 taken from various angles;
9 is a perspective view of a screw according to another modified example of FIG. 2 .
FIG. 10 is a plan view of FIG. 9 .
Fig. 11 is a side view of Fig. 9 taken from various angles;
12 is a perspective view of a screw according to a second embodiment of the present invention.
13 is a plan view of FIG. 12 .
14 is a side view of a screw according to a third embodiment of the present invention.
15 and 16 are exploded perspective views of the juice drum shown in FIG. 1 .
17 is a combined perspective view of the juice drum of FIGS. 15 and 16 .
18 is a cross-sectional view of a juicer according to a second embodiment of the present invention.
19 is a perspective view of the screw shown in FIG. 18 .
20 and 21 are exploded perspective views of FIG. 19 .
22 is a perspective view of a screw according to a modified example of FIGS. 19 to 21 .
23 is a perspective view of a screw according to another modified example of FIGS. 19 to 21 .
Fig. 24 is a perspective view of the housing taken along line A-A' of Fig. 18;
25 is a view showing a screw and a housing of a juicer according to a third embodiment of the present invention.
Figure 26 is a perspective view of the screw of Figure 25;
FIG. 27 is a view showing a screw and a housing of a juicer according to a modified example of FIG. 25 .
28 is a view showing the screw and the housing of the juicer according to the fourth embodiment of the present invention.

The specific details of the embodiments are included in the detailed description and drawings.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the present embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In addition, since each configuration shown in the drawings is arbitrarily shown for the convenience of description, the present invention is not necessarily limited to the bars shown in the drawings, and the size or shape of the components shown in the drawings are exaggerated for clarity and convenience of explanation. can be shown. Therefore, the terms specifically defined in consideration of the configuration and operation of the present invention may vary according to the intention or custom of the user or operator, and definitions of these terms should be made based on the content throughout this specification.

In the present specification, unless otherwise specified, the terms 'upper', 'upper', 'top' or similar terms refer to the side or close to the side to which the material is added, and the term 'bottom', 'bottom', The term 'bottom' or a similar term is intended to refer to a portion or end opposite to or close to the side into which the material is fed.

Hereinafter, the present invention will be described with reference to the drawings for explaining the juicer according to the embodiments of the present invention.

1 is a cross-sectional view of a juicer according to a first embodiment of the present invention.

The juicer according to the first embodiment of the present invention may include a main body 100 , a housing 200 , a screw 300 , and a juicer drum 400 .

The main body 100 is supported from the bottom surface and the driving unit 110 for rotating the screw 300 may be disposed therein. The driving unit 110 may be composed of a motor and a reducer, but may be composed of only a low-speed motor without a reducer. Unlike the conventional blender that rotates the rotating blade at high speed to finely crush the material, the present invention rotates the screw 300 at a low speed to compress and pulverize the material. Since it is related to the machine, the screw 300 is rotated at a low speed.

At this time, the driving shaft 120 of the motor protrudes from the upper portion of the main body 100 , and the driving shaft 120 is coupled with the screw 300 to rotate the screw 300 .

The housing 200 has a container shape and is coupled to the upper portion of the main body 100 , and can accommodate a screw 300 and a juicer drum 400 to be described later in the housing 200 . The housing 200 may be formed in an open top surface, and materials may be introduced into the housing 200 through the inlet 230 which is an open upper surface. Accordingly, as illustrated, a material having a size larger than the radius of the screw 300 may be introduced into the housing 200 . Although not shown, a lid (not shown) for opening and closing the upper inlet 230 of the housing 200 may be formed. A separate input hole may be formed in the lid to limit the size of the material to be injected into the housing 200 within a predetermined range although larger than the radius of the screw 300 .

In the center of the bottom surface of the housing 200, a waterproof cylinder 240 having a through hole 242 is formed to protrude upward, and the lower rotation shaft 350 of the screw 300 to be described later is inserted through the through hole 242. It may be coupled to the drive shaft 120 under the housing 200 . The waterproof cylinder 240 is formed to protrude upward to prevent juice from flowing into the driving unit 110 through the through hole 242 . In addition, a packing ring (not shown) formed of a material such as rubber or silicone is inserted at the edge of the through hole 242 to more effectively prevent the juice from flowing into the body 100 .

A screw 300 is disposed at the lower end of the housing 200. As shown, the upper inner side of the housing 200 positioned above the screw 300 waits for the material input from the inlet 230 before juicing. form an atmospheric space.

And, on the outside of the lower end of the housing 200, a juice outlet 250 for discharging juice extracted from the material inside the housing 200 and a residue outlet (not shown) for discharging the remaining residues are formed to be spaced apart from each other.

As will be described later, the juice flowing out of the juice drum 400 through the outlet hole of the juice drum 400 flows to the juice outlet 250 communicating with the bottom surface of the housing 200 and is discharged, and separated by juice The remaining residue may be discharged to the outside of the juice drum 400 through the bottom or lower side of the juice drum 400 and finally discharged from the residue outlet of the housing 200 communicating therewith.

The screw 300 is disposed at the lower end inside the housing 200 , the shaft hole 351 of the lower rotation shaft 350 extending downward from the inner center of the screw 300 through the drive shaft 120 of the main body 100 described above. It is possible to mount the screw 300 by inserting it into the .

In the present embodiment, the housing 200 has the screw 300 disposed therein, and the juice outlet 250 and the residue outlet described above are bound on the lower housing 210 and the lower housing 210 formed on the outside of the lower end, so that the upper It may be formed by being separated from the open inlet 230 into the upper housing 220 forming a space for the input material to stay.

At this time, a pressing step 222 or a pressing protrusion 224 is formed at the lower end of the upper housing 220 as shown, and the juice is disposed inside the lower housing 210 when it is fastened with the lower housing 210 . The drum 400 is pressed down to fix the position of the juice drum 400 . In FIG. 1, the pressing step 222 supports the upper edge side and the upper surface of the inner module 410 constituting the juice drum 400 to press the pressure in the lower direction, the pressing protrusion 224 protrudes in the lower direction to juice It is formed to press the upper surface of the edge of the outer module 450 constituting the drum 400 in the lower direction, but is not limited thereto and can be deformed in various forms.

In addition, one or more crushing locking jaws 270 protruding in the vertical direction may be formed on the inner surface of the upper housing 220 in the circumferential direction of the inner surface. As will be described later, the screw 300 according to the present invention may be formed in a form in which the screw thread 320 extends over the screw body 310 . At this time, the end of the screw thread 320 extending above the screw body 310 is positioned at the lower end of the upper housing 220 . At this time, even if a material with a large size such as an apple or an orange that is not cut in advance is put into the upper housing 220 , the screw thread 320 extending over the screw body 310 rotates while rotating the upper housing 220 . The material can be effectively crushed by interaction with the crushing stopper 270 protruding in the longitudinal direction along the inner surface. That is, the material can be crushed by compression and mutual cutting according to the rotation of the screw thread 320 extending above the screw body 310 in a state where the large material is caught on the crushing engaging jaw 270 . At this time, when the screw 300 rotates, the pulverized materials can be easily moved down the screw 300 along the downwardly inclined screw thread 320 surface.

In this embodiment, the case in which the grinding stopper 270 is formed in the upper housing 220 with respect to the case in which the housing 200 is separated into the upper housing 220 and the lower housing 210 will be described as an example, As will be described later with reference to FIG. 18 , the housing 200 may be integrally formed without being separated into the upper housing 220 and the lower housing 210 . Also in this case, the grinding stopper 270 protruding in the longitudinal direction along the circumferential direction of the inner surface of the housing 200 may be formed, and the grinding stopper 270 extends to the upper portion of the screw body 310 . In order to interact with the screw thread 320, the lower end of the pulverization protrusion 270 is at least formed to extend to the upper end of the screw 300 in which the screw thread 320 extending above the screw body 310 is located. desirable.

At this time, the direction of the grinding stopper 270 is preferably formed to protrude vertically downward from the inner surface of the housing 200 , but may be formed to be inclined at a predetermined angle. In addition, when the plurality of crushing locking jaws 270 are formed along the inner surface of the housing 200 , the respective inclination angles may be formed differently.

The screw 300 is disposed at the lower end of the housing 200, receives power from the drive shaft 120 of the main body 100, rotates at a low speed about the rotation shaft, and is located between the juice drum 400 and the screw 300 to be described later. The material is moved to the lower portion and the juice is squeezed and crushed by interaction with the juice drum 400 to perform the juice.

A lower rotating shaft 350 protruding downward is formed at the lower portion of the screw 300 , and as described above, the lower rotating shaft 350 is coupled to the driving shaft 120 of the motor to rotate. In this case, a shaft hole 351 into which the drive shaft 120 is inserted is formed in the lower rotation shaft 350 , and the screw 300 may be coupled to the drive shaft 120 . Preferably, it is formed as a prismatic shaft hole 351 so that the coupling between the drive shaft 120 and the screw 300 can be solidly formed, and accordingly, the drive shaft 120 is also preferably formed as a prismatic shaft.

Hereinafter, various embodiments of the screw 300 according to the present invention will be described in more detail with reference to FIGS. 2 to 14 .

2 and 3 are perspective views of the screw according to the first embodiment of the present invention shown in FIG. 1 , FIG. 4 is a plan view of FIG. 2 , and FIG. 5 is a side view of FIG. 2 viewed from various angles, and FIG. 6 is a perspective view of a screw according to a modification of FIG. 2 , FIG. 7 is a plan view of FIG. 6 , FIG. 8 is a side view of FIG. 6 viewed from various angles, and FIG. 9 is a perspective view of a screw according to another modification of FIG. 2 , Fig. 10 is a plan view of Fig. 9, Fig. 11 is a side view of Fig. 9 shown from various angles, Fig. 12 is a perspective view of a screw according to a second embodiment of the present invention, and Fig. 13 is a plan view of Fig. 12 , Figure 14 is a side view of a screw according to a third embodiment of the present invention.

First, a screw 300 according to a first embodiment of the present invention will be described with reference to FIGS. 2 to 11 .

The screw 300 may include a screw body 310 and a screw thread 320 protruding in a spiral shape from the outer surface of the screw body 310 .

The screw body 310 may be divided into an upper portion and a lower portion centering on a portion having the largest radius of the screw 300 as shown. The lower portion of the screw body 310 is formed to have a gradually smaller radius as it goes down, and by making the radius smaller as it goes down, it is possible to form a space in which the residue separated by the juice is located. However, the lower shape of the screw body 310 is not limited thereto, and, for example, may be formed in a straight line downward without a change in radius.

In addition, the upper portion of the screw body 310 is formed to have a gradually smaller radius as it goes upward, and as shown, the radius of change according to the height change is larger than that of the lower portion of the screw body 310 . The tip of the screw body 310 has the smallest radius and is formed to gradually increase in radius as it goes down. According to such a shape, a large material can be transported while gradually decreasing in size by compression and pulverization. to form space. In other words, since the diameter of the upper part of the screw body 310 is gradually increased as it goes down, the size of the space in which the material formed by the screw body 310 together with the screw thread 320 is transported gradually increases along the feeding direction of the material. becomes smaller as That is, by the rotation of the screw 300, the material is compressed and pulverized to gradually decrease in size and move downwards along the transfer space that is gradually reduced along the screw thread 320 formed in the downward direction. it will be done

The screw thread 320 is formed to protrude in the form of a spiral on the outer circumferential surface of the screw body 310, and the juice target is compressed into a narrow gap between the screw 300 and the juice drum 400 by the screw thread 320. transfer to the lower side. At this time, it is preferable that the screw thread 320 protrudes so as to be in contact with or close to the juice drum 400 or the housing 200 . As described above, the upper portion of the screw body 310 has a smaller radius as it goes upward, and thus the protrusion height of the screw thread 320 increases toward the upper portion of the screw body 310 .

The screw thread 320 may be formed in one or a plurality, in the present invention, any one of the threads is formed extending upwards of the screw body 310 in the form of a spiral as shown (hereinafter, 'first screw thread ( 320-1) is called 'extension'). Therefore, since the screw body 310 does not exist at the height at which the extension of the first screw thread 320-1 is formed, the size is larger than the radius of the screw 300 even when the extension of the first screw thread 320-1 is considered. It is possible to form a space in which a large material is located, and when the screw 300 rotates in the space, the extension of the first screw thread 320-1 and the grinding protrusion 270 formed on the inner surface of the housing 200 ) and the interaction between them can crush the material. At this time, since the screw thread 320 surface is formed to be inclined downward, the pulverized material is transported downward along the screw thread 320 and juice is performed at the lower end of the screw 300 .

As such, in the present invention, there is no need for a structure for supporting the upper rotational shaft on the screw 300 by supporting only the lower rotational shaft 350 away from the conventional structure of supporting and rotating both ends of the rotational shaft of the screw 300 . Therefore, it is possible to utilize the entire space on the screw 300, and thus, it is possible to directly inject a large-sized material through the inlet 230 on the screw 300 to perform the juice.

At this time, as shown in FIGS. 2 to 5 , the shape of one end of the extension part of the first screw thread 320-1 is in the opposite direction in which the first screw thread 320-1 extends above the screw body 310 . It is formed in the form of a concave arc as a whole so that the first screw thread 320-1 of the upper end may have a hook shape.

In addition, as shown in FIGS. 6 to 8 , one end of the extension of the first screw thread 320-1 is formed in a straight line, so that the first screw thread 320-1 at the top has a semicircular shape. can be

Furthermore, as shown in FIGS. 9 to 11 , the shape of one end of the extension of the first screw thread 320-1 is in the direction in which the first screw thread 320-1 extends above the screw body 310 . It is formed in the form of a convex arc, so that the first screw thread 320-1 of the upper end may have a cotyledon shape as a whole.

In addition, as shown, a second screw thread 320-2 that is spirally formed starting from the upper part of the screw body 310 may be formed, and a first screw thread of the lower part of the screw body 310 may be formed. Another plurality of threads 320-3 may be formed between the 320-1 and the second screw thread 320-2. Accordingly, the width between the adjacent screw threads 320 formed in the screw body 310 is formed to have a relatively wide interval at the upper portion of the screw body 310 , and a plurality of screws at the lower portion of the screw body 310 . It is formed to have a relatively narrow interval by the screw threads (320-1, 320-2, 320-3). That is, the upper side of the screw 300 mainly performs a function of crushing a large-sized juice target, and the lower side of the screw 300 may mainly perform the function of juicing by crushing and pressing.

In addition, a plurality of residue guide jaws 330 protruding outward from the lower end of the screw body 310 may be formed in a circumferential direction. The residue guide jaw 330 performs a function of sweeping down the residues separated by the juice when the screw 300 rotates and transferred to the lower side of the juice drum 400 . As described above, by smoothly removing the residues caught below the juice drum 400 by the residue guide jaws 330 formed on the radial outer peripheral surface of the lower end of the screw 300, it is possible to further increase the juice extraction efficiency.

Next, the screw 300 according to the second embodiment of the present invention will be described with reference to FIGS. 12 to 13 . For the convenience of description, a portion with a large shape change of the screw body 310 will be divided into a lower portion, an upper portion, and an upper portion indicated in the drawings.

Overall, in this embodiment, the screw body 310 does not have a left-right symmetrical shape about the rotation axis, unlike the above-described embodiment, but has an eccentric shape to one side.

More specifically, the lower portion of the screw body 310 has a constant diameter or little change in diameter, similar to the above-described embodiment. In the lower part of the screw body 310 , by the rotation of the screw 300 , juice is produced by crushing and pressing with a strong pressure between the screw 300 and the juice drum 400 . In addition, although not shown, a lower rotating shaft 350 coupled to the driving shaft may be formed in the lower center of the screw body 310 .

The upper portion of the screw body 310 is formed in an eccentric cone shape. At this time, the shape of the eccentric cone may be formed eccentrically so that the cross-sectional area is gradually reduced in the form of rotating in the extending direction of the screw toward the upper portion as shown. In addition, the shape of the eccentric cone gradually decreases as it goes to the top when cut from the side to the cross section, and one side extends from the lower part of the screw body 310 in a vertical form, and the other side is a right triangle with an inclination toward one side extending upward. It may have an eccentric cone shape close to . Accordingly, in the opposite direction to the eccentricity, a grinding movement space can be formed to grind the material and move it downward. At this time, if the upper portion of the screw body 310 is eccentric to form a grinding movement space in the opposite direction to the eccentricity, the shape of the eccentric cone may be variously formed in addition to the above-described shape. In this case, a portion of the screw thread 320 formed in the lower portion of the screw body 310 may extend to the upper portion of the screw body 310 to protrude from the screw body 310 . Accordingly, the upper portion of the screw body 310 is crushed and juiced to a smaller size while gradually moving the juice target crushed by the crushing blade 340 of the screw upper end to the lower portion of the screw body 310 along the screw thread 320 . will make

The upper end of the screw body 310 forms a crushing blade 340 protruding to one side. At this time, as shown in FIG. 13 , the crushing blade 340 may protrude from the eccentric upper end of the screw body 310 in the circumferential direction in which the screw 300 rotates, but is not limited thereto. That is, in FIG. 13 , the screw body 310 may also protrude toward the center of the rotation axis. At this time, the upper surface of the screw body 310 on which the crushing blade 340 is formed may form a horizontal surface, and the lower surface may form an inclined surface to form the protruding crushing blade 340 . The screw thread 320-1 extending to the upper part of the screw body 310 may be formed to extend to the upper surface of the upper end of the screw body 310, but is not limited thereto. That is, the screw thread 320-1 does not necessarily extend to the upper end of the screw body 310 .

At this time, compared to the first screw thread 320-1 protruding first in the opposite direction eccentric from the top of the screw body 310, the second screw thread 320-2 protruding below it is formed to protrude further in the radial direction. It is preferable to be That is, the second screw thread 320-2 protrudes further in the radial direction and is formed closer to the juice drum 400, and the first screw thread 320-1 is relatively spaced apart from the juice drum 400. to form space. As the screw 300 goes down, the size of the material to be pulverized becomes smaller, and the material located in the space between the first screw thread 320-1 and the juice drum 400 is easily reduced to a smaller size. It can be crushed or cut.

In this embodiment, the screw thread 320 is not formed to extend over the screw body 310 as compared to the previous embodiment, but as shown in FIG. 13 , as the upper portion of the screw body 310 is formed eccentrically, the screw ( 300) to form a space where the juice material larger than the radius can be seated. Therefore, as the screw 300 rotates, the juice material is crushed by the crushing blade 340 of the upper end of the screw body 310 and moves to the upper portion of the screw body 310 .

In this embodiment, as in the above-described embodiment, only the lower rotary shaft 350 of the screw 300 is supported, and the upper portion is opened without being supported. In addition, starting from the uppermost part of the screw body 310 and extending to the lower end of the screw body 310 to protrude from the first screw thread 320-1 and the first screw thread 320-1, starting from below the screw body. A second screw thread 302-1 extending to the lower end and protruding may be formed, and between the first screw thread 320-1 and the second screw thread 320-2, another plurality of threads may be formed. A screw thread 320 - 3 may be formed. In addition, a plurality of debris guide jaws 330 protruding outward from the lower end of the screw body 310 may be formed in a circumferential direction.

Next, the screw 300 according to the third embodiment of the present invention will be described with reference to FIG. 14 .

In this embodiment, the screw body 310 may be divided into a lower portion and an upper portion as shown in the drawings. The lower portion of the screw body 310 is symmetrical and has a constant diameter or a diameter similar to the above-described embodiment. There is little change in In the lower part of the screw body 310 , by the rotation of the screw 300 , a strong pressure between the screw 300 and the juice drum 400 is used to extract the juice by crushing and pressing. Also, although not shown, a lower rotating shaft 350 coupled to the driving shaft 120 may be formed in the lower center of the screw body 310 .

The upper portion of the screw body 310 has a smaller cross-sectional area toward the upper portion and is eccentric to one side. Accordingly, the upper end of the screw body 310 is not located on the rotation axis of the screw body 310, but is located at an eccentric position in the radial direction.

At this time, even in this embodiment, a plurality of screw threads 320 protruding along the screw body 310 may be formed, and in particular, a first screw thread 320-1 extending to the uppermost part of the screw body 310 . ), the screw thread 320-1 located at the uppermost part is formed to protrude upwardly. At this time, it is preferable to protrude long enough to approach the juice drum 400 , but the blade end of the screw thread 320-1 is at a lower position than the upper surface of the screw body 310 .

Therefore, a juice material larger than the radius of the screw 300 can be seated in the space between the upper end of the screw body 310 located in an eccentric position and the first screw thread 320-1 extending to the uppermost position. . Accordingly, the seated juice material is cut and pulverized by the first screw thread 320-1 extending to the upper part of the screw 300 by the rotation of the screw 300 to move to the lower part of the screw body 310 .

In this embodiment, as in the above-described embodiment, only the lower rotary shaft 350 of the screw 300 is supported, and the upper portion is opened without being supported. In addition, starting from the uppermost part of the screw body 310 and extending to the lower end of the screw body 310 to protrude from the first screw thread 320-1 and the first screw thread 320-1, starting from below the screw body. A second screw thread 320-2 extending to the lower end and protruding may be formed, and between the first screw thread 320-1 and the second screw thread 320-2, another plurality of threads may be formed. A screw thread 320 - 3 may be formed. In addition, a plurality of debris guide jaws 330 protruding outward from the lower end of the screw body 310 may be formed in a circumferential direction.

Again, referring to FIG. 1 , when the juice drum 400 is described, the juice drum 400 is coupled to the housing 200 from the inside of the housing 200 and accommodates the screw 300 therein. That is, the juice drum 400 is positioned between the housing 200 and the screw 300 . The material inputted from the inlet 230 and positioned on the upper portion of the housing 200 is pulverized by the interaction between the first screw thread 320-1 and the crushing stopper 270 and transported downward. Next, the material positioned between the juice drum 400 and the screw 300 is compressed and pulverized while being transported down along the screw 300 . The juice extracted in this process is discharged to the outside of the juice drum 400 through the outlet hole formed in the juice drum 400 and finally discharged through the juice outlet 250 of the housing 200, and the juice separated from the residue is It is transferred to the space under the juice drum 400 and is finally discharged through the waste outlet of the housing 200 .

Hereinafter, the juice drum 400 according to an embodiment of the present invention will be described in more detail with reference to FIGS. 15 to 17 .

15 and 16 are exploded perspective views of the juice drum shown in FIG. 1 , and FIG. 17 is a combined perspective view of the juice drums of FIGS. 15 and 16 .

As shown, the juice drum 400 according to the present invention may be configured by a combination of the inner module 410 and the outer module 450 . Here, the inner module 410 and the outer module 450 may be made of a material such as polyetherimide (PEI).

The inner module 410 has a generally cylindrical shape, and the upper and lower sides may be opened. Here, the inner module 410 includes a plurality of inner plate portions 411 , and a plurality of slits 412 are formed by the plurality of inner plate portions 411 .

Here, the plate part is named for convenience of description of the design, and when dividing the plate part in which the slit 412 is formed and the plate part in which the slit 412 is not formed in the cylindrical module, the plate part in which the slit 412 is not formed. It is defined as "the board".

In this case, the width of the slit 412 on the upper side of the slit 412 may be smaller than the width of the slit 412 on the lower side. That is, the width of the slit 412 may become narrower toward the upper side. Also, as shown in FIG. 15 , a stepped portion 413 may be formed in the slit 412 . A width of the upper slit 412 may be smaller than a width of the lower slit 412 with respect to the stepped portion 413 .

In addition, the first rib tuck 420 may be protruded from the inner circumferential surface of the inner plate portion 411 . The first rib jaw 420 compresses or pulverizes the material by interaction with the screw thread 320 according to the rotation of the screw 300 . If the first rib tuck 420 is not present, the juice target may not go down and may be stagnant, or the compression or crushing force may be low or may not occur.

In addition, a second rib tuck 425 protruding in the longitudinal direction may be formed on the inner surface of the inner plate portion 411 . The second rib tuck 425 serves to transport the material input into the juice drum 400 to the lower portion and crush the juice target. The second rib tuck 425 may perform a function of reinforcing the rigidity of the inner module 410 , and may perform a function of guiding a juice target into the juice drum 400 . In addition, the second rib jaw 425 may perform a function of adjusting the position of the screw 300 and adjusting the juice space.

The protrusion height of the second rib tuck 425 may be formed to have the same height from the upper part to the lower part of the inner module 410 , but is preferably formed in a form that gradually decreases from the upper part to the lower part of the inner module 410 . can be In addition, the second rib tuck 425 is formed to be inclined downward from the upper part of the inner module 410 to the lower part, and protrudes toward the screw 300 in the middle portion thereof to form a stepped stepped part 426. can The stepped portion 426 may be variously modified in its position, number, or protruding height according to the shape of the screw 300 and the design conditions of the screw thread 320 . The number and arrangement of the second rib tucks 425 may be variously changed as needed in consideration of design conditions and efficiency of juicing. In the embodiment of the present invention, the formation direction of the second rib tuck 425 has been described as an example that is formed vertically in the vertical direction of the inner module 410, but the scope of the present invention is not limited thereto.

At this time, the first rib tuck 420 is formed on the lower inner surface of the inner plate portion 411 , and the second rib jaw 425 is formed on the entire lower portion from the inner surface of the inner plate portion 411 .

Next, the outer module 450 will be described. The outer module 450 has a generally cylindrical shape, and includes an outer plate 451 having open upper and lower sides and a rib 452 protruding from an inner surface of the outer plate 451 .

The outer plate portion 451 is formed to be detachable (removable) by accommodating the inner module 410 therein. That is, the outer module 450 may be coupled to receive and surround the inner module 410 when combined with the inner module 410 . In this case, the outer module 450 may surround and support the inner module 410 .

When the outer module 450 and the inner module 410 move up and down and are coupled, the rib 452 is inserted into the slit 412 under the slit 412 of the inner module 410 and coupled thereto. At this time, a slit hole, which is a minute gap formed between the slit 412 and the rib 452, is formed. Through the slit hole, the juice generated in the juice drum 400 can be discharged to the outside.

As such, in this embodiment, the slit 412 of the inner module 410 and the rib 452 of the outer module 450 are coupled to the outlet hole for discharging juice through the gap between the slit 412 and the rib 452 . Therefore, it is very easy to clean compared to the conventional mesh drum.

At this time, the rib 452 may be formed to correspond to the shape of the slit 412 described above, and the width of the rib 452 is narrower toward the upper side so that the width of the upper rib 452 is that of the lower side. It may be smaller than the width of the rib 452 .

In addition, a stepped portion 453 is formed in the rib 452 , and the width of the upper rib 452 may be smaller than the width of the lower rib 452 based on the stepped portion 453 .

When the outer module 450 and the inner module 410 are moved up and down by the shape of the rib 452 and the slit 412 as described above and coupled, the lower portion of the relatively wide slit 412 is relatively wide. By inserting the upper part of the small rib 452, the outer module 450 and the inner module 410 can be easily coupled.

In addition, a plurality of juice discharge holes 460 may be formed in the outer plate portion 451 along the plate surface of the outer surface.

In this way, the juice formed inside the juice drum 400 formed by the combination of the inner module 410 and the outer module 450 is the slit 412 of the inner module 410 and the rib 452 of the outer module 450. It may be discharged to the outside of the juice drum 400 through a slit hole formed between the slit hole and the juice discharge hole 460 formed in the outer module 450 .

At this time, it is preferable that the gap formed between the slit 412 and the rib 452 is formed to increase the width of the gap in the radial direction to facilitate the discharge of juice. Furthermore, in the longitudinal direction, the width of the gap is made smaller as it goes down, so that the residue produced by being pulverized more finely toward the bottom is prevented from being discharged through the gap, and strong pressure by the screw 300 is applied. It is preferable to support it.

Hereinafter, a juicer according to a second embodiment of the present invention will be described with reference to FIGS. 18 to 24 .

Figure 18 is a cross-sectional view of a juicer according to a second embodiment of the present invention, Figure 19 is a perspective view of the screw shown in Figure 18, Figures 20 and 21 are an exploded perspective view of Figure 19, Figure 22 is Figure 19 to 21 is a perspective view of a screw according to a modified example of FIG. 23 , FIG. 23 is a perspective view of a screw according to another modified example of FIGS. 19 to 21 , and FIG. 24 is a perspective view of the housing cut along AA′ in FIG. 18 . .

In the following description, differences from the above-described embodiment will be mainly described with reference to FIGS. 1 to 17 .

First, the biggest difference compared to the above-described embodiment is that the juice drum 400 is disposed between the housing 200 and the screw 300 in the above embodiment, but in this embodiment, the juice drum 400 is omitted and Instead, the shape of the screw 300 is deformed. In this embodiment, the screw 300 is configured to be separated and coupled to the first module 360 and the second module 380. Hereinafter, the screw 300 according to the embodiment of the present invention will be described in more detail with reference to the drawings. let me explain

The screw 300 according to the embodiment of the present invention may be configured to include two cylindrical first modules 360 and second modules 380 .

The first module 360 includes a first body 361 having a generally open lower portion and a cylindrical shape having a hollow formed therein, and a plurality of slits 362 formed long in the longitudinal direction along the circumference of the first body 361 . formed by including

On the outer peripheral surface of the first body 361, a screw thread 320 may be formed obliquely with respect to the longitudinal direction.

The second module 380 includes a second body 381 in a cylindrical shape with a substantially closed upper portion and a plurality of protruding shapes corresponding to the slit 362 of the first module 360 on the outer surface of the second body 381 . It may be formed of ribs 382 .

A screw thread 320 may be formed on the outer peripheral surface of the second module 380 as in the first module 360 . In the case of the second module 380 , a screw thread 320 may be formed on an outer circumferential surface of the rib 382 .

At this time, as shown in FIG. 19 when the first module 360 and the second module 380 are coupled, the screw threads 320 formed in the first module 360 and the second module 380 are continuous. can be formed with There are cases in which some sections are slightly cut off, but generally a continuous screw thread 320 is formed.

When the first module 360 and the second module 380 as described above are combined, the inner diameter of the first body 361 of the first module 360 is the outer diameter of the second body 381 of the second module 380 . The larger first module 360 is wrapped and coupled to receive the second module 380, and the rib 382 of the second module 380 is inserted into the slit 362 of the first module 360 to be coupled. When the slit 362 is not formed of the first body 361 and the rib 382 of the second body 381 is not formed is coupled in a radially overlapping form.

At this time, as the rib 382 of the second module 380 is inserted into the slit 362 of the first module 360 , a predetermined gap is formed between the slit 362 and the rib 382 . The juice may be introduced into the screw 300 and discharged through the gap, and the residue from which the juice is separated may be collected and discharged to the outside between the screw 300 and the housing 200 .

In addition, when the first module 360 and the second module 380 are coupled, a clearance is formed between the outer surface of the second body 381 and the inner surface of the first body 361 to form a spaced space. can do The juice introduced into the separation space through the gap through the gap may move downward between the first module 360 and the second module 380 . At this time, the juice discharge hole 385 may be formed on the lower side of the second body 381 . The juice collected in the lower part of the separation space between the first module 360 and the second module 380 through the juice discharge hole 385 may be introduced into the screw 300 .

Therefore, in this embodiment, the material is compressed between the housing 200 and the screw 300 without the need to dispose a separate juice drum 400 between the screw 300 and the housing 200 compared to the above-described embodiment. And the crushed juice is separated into juice and residue, and the generated juice is introduced into the screw 300 and discharged to the juice outlet 250 , and the residue transferred under the housing 200 is separated and discharged through the residue outlet. Therefore, the first rib jaw 280 and the second rib jaw corresponding to the first rib jaw 420 and the second rib jaw 425 positioned on the inner surface of the inner module 410 of the juice drum 400 described above A configuration of 285 may be formed on the inner surface of the housing 200 as shown in FIG. 24 .

The shape of the extension of the first screw thread 320-1 on the screw 300 is the same as the embodiment described above with reference to FIGS. 1 to 11, and as shown in FIGS. 22 to 23, the first screw thread ( 320-1), the shape of the extension part can be modified not only in a hook shape, but also in a semicircular shape and a cotyledon shape.

In addition, in the above-described embodiment, the housing 200 is formed separately into the lower housing 210 and the upper housing 220, in this embodiment, the housing 200 is integrally formed. The screw 300 may be disposed at the lower end of the housing 200 that is integrally formed, and the grinding stopper 270 as described above may be formed on the inner surface of the upper end of the housing 200 .

Hereinafter, a juicer according to a third embodiment of the present invention will be described with reference to FIGS. 25 to 27 .

25 is a view showing a screw and a housing of a juicer according to a third embodiment of the present invention, FIG. 26 is a perspective view of the screw of FIG. 25, and FIG. 27 is a juicer according to the modified example of FIG. It is a drawing showing a screw and a housing.

Hereinafter, in the description of the present embodiment, the difference between the juicer and the juicer of the first embodiment will be mainly described with reference to FIGS. 1 to 17 .

First, in the above embodiment, the screw thread 320 is formed to extend above the screw body 310 in the form of a spiral, but in this embodiment, any one screw thread 320 as shown in FIGS. 25 and 26 . ) is extended upward in the form of a spiral, extending only to the upper end of the screw body 310 and not extending above the screw body 310 . At this time, as shown, the screw thread 320 at the top of the screw body 310 is formed to protrude horizontally in the radial direction of the screw body 310 . The screw thread 320 protruding horizontally allows the material input from the inlet 230 to be input from the top of the screw 300 to be cut and crushed together with the inner surface of the housing 200 .

At this time, although the screw thread 320 of the upper end of the screw body 310 is formed to protrude in only one radial direction in the drawing, it may be formed to protrude in a plurality of directions including both directions. In addition, the screw thread 320 at the top of the screw body 310 is extended in the horizontal direction in the form of a straight line, but is formed to be inclined downward at a predetermined angle so that the material pulverized together with the pulverization of the material is the screw thread 320 . It can also be easily transferred to the lower part.

In this embodiment, as in the above-described embodiment, the upper portion of the screw body 310 is not rotatably supported, and the upper portion of the screw 300 is opened and uniaxially supported.

At this time, when a material larger than the radius of the screw body 310 is input, the screw body 310 as shown in FIG. 25 so that the material can be easily cut by the screw thread 320 at the top of the screw body 310 . ) It is preferable to form a spaced space between the screw thread 320 formed on the upper end and the inner surface of the housing 200 . Here, when a material larger than the radius of the screw body 310 is inputted as a spaced space, at least a portion of the material is seated and cut between the screw thread 320 at the top of the screw body 310 and the inner surface of the housing 200 . And there may be a sufficient space to be pulverized, and a much wider space should be formed than the space between the screw thread 320 and the inner surface of the housing 200 in the lower part of the screw 300 in which the juicing is performed.

As shown in FIG. 25 , the housing 200 has a cross-sectional area formed by the inner surface of the housing 200 from the position below the upper end of the screw 300 to the upper part, that is, the housing 200 is widened as it goes upward. It can be formed in a shape to form a spaced apart space.

In addition, as shown in FIG. 27 , the separation space may be formed in a form in which the housing 200 opens upwards only from one eccentric side of the housing 200 .

Hereinafter, a juicer according to a fourth embodiment of the present invention will be described with reference to FIG. 28 .

28 is a view showing the screw and the housing of the juicer according to the fourth embodiment of the present invention.

Hereinafter, in the description of the present embodiment, the difference between the juicer and the juicer of the first embodiment will be mainly described with reference to FIGS. 1 to 17 .

In this embodiment, the shape of the screw body 310 is not symmetrical, but has a shape eccentric to one side as shown in FIG. 28 . More specifically, the lower part of the screw body 310 is similar to the shape of the existing screw body 310, but the cross-sectional area of the screw body 310 becomes smaller as it goes from the lower part to the upper end and is extended to one side eccentrically. That is, the upper end of the screw body 310 is not located in the center of left-right symmetry, but is formed to be located outside in the radial direction. Accordingly, the left part of the screw 300 shown in FIG. 28 is used for conveying and compressing the material by the screw thread 320 protruding from the housing 200 and the screw body 310 like the conventional screw 300 . It is possible to perform juicing by this, and the right side of the screw 300 can form an inclined surface and form a grinding space that becomes wider toward the top.

Therefore, in this embodiment, the material input from the inlet 230 can be introduced into the grinding space from above the screw 300, so that the material having a size larger than the radius of the screw 300 can be input, and the material in the grinding space can be crushing takes place. The pulverized materials are transferred to the lower part of the screw 300 , and at the same time, the juice is performed on the left side of the screw 300 and the lower part of the screw 300 .

At this time, the grinding blade 325 for cutting and grinding the material may be formed on the inclined surface of the screw body 310 forming the grinding space. The grinding blade 325 may be formed to extend from the screw spiral 320 formed in the screw body 310, or may be formed to extend toward the grinding space separately. In addition, the shape of the grinding blade 325 may be varied, such as a shape protruding in the horizontal direction in a straight line, a hook shape, a semicircular shape, and the like.

In addition, the screw 300 of the embodiment described with reference to FIGS. 12 to 14 can also be used in this embodiment. In addition, when the screw 300 is formed integrally with the screw 300 without discharging the juice into the screw 300 by separating the screw 300 into the first module 360 and the second module 380 , the housing 200 and the screw Deformation so that the juice drum 400 is disposed between the 300 is obvious to those skilled in the art of the present invention.

The scope of the present invention is not limited to the above-described embodiments, but may be implemented in various types of embodiments within the scope of the appended utility model claims. Without departing from the gist of the present invention claimed in the claims of the utility model, it is considered that it is within the scope of the claims of the present invention to the extent that it can be modified by anyone with ordinary knowledge in the technical field to which the invention belongs.

100: body
110: driving unit
120: drive shaft
200: housing
210: lower housing
220: upper housing
222: pressurized step
224: pressure projection
230: inlet
240: waterproof cylinder
242: through hole
250: juice outlet
270: crushing jaw
280: first rib tuck
285: second rib tuck
300: screw
310: screw body
320: screw thread
325: grinding blade
330: debris guide jaw
340: crushing blade
350: lower rotation shaft
351: shaft
360: first module
361: first body
362: slit
380: second module
381: second body
382: rib
385: juice discharge hole
400: juice drum
410: inner module
411: inner plate
412: slit
413: step part
420: first rib tuck
425: second rib tuck
426: stepped portion
450: outer module
451: outer plate
452: rib
453: step part
460: juice discharge hole

Claims (16)

a body including a drive shaft protruding upward;
a housing having an open upper portion to form an inlet for inputting a material, a juice outlet for discharging juice extracted from the material, and a residue outlet for discharging the remaining residues, the housing being mounted on the upper portion of the main body; and
and a screw disposed at the lower end of the housing and rotating in combination with the drive shaft,
The screw is formed to protrude on the outer circumferential surface of the screw body and the screw body rotating around the rotational shaft, and is introduced through the inlet to crush, press, and transport the material positioned between the inlet and the one or more screw threads to generate juice includes,
The screw is coupled only to the drive shaft located at the lower portion and rotates in a supported state on one side, and an open space is formed in the housing in which a material having a size larger than the radius of the screw is put on the upper side of the body of the screw,
The upper portion of the body of the screw has a shape that gradually decreases in radius toward the upper portion,
Any one of the screw threads is formed to extend above the screw body in the form of a spiral, and the end of the screw thread extending over the screw body is located in the lower part of the open space. delete The method of claim 1,
the housing is
a lower housing in which the screw is disposed therein to separate the material into juice and residue by compression, and the juice outlet and the residue outlet are spaced apart from each other on the outside; and
A juicer that is coupled to the upper portion of the lower housing and formed separately into an upper housing that forms the open space to form a space for the input material to stay. The method of claim 1,
It is disposed between the housing and the screw to surround the screw, and further comprises a juice drum in which an outlet hole is formed for discharging the juice produced by pressing and conveying the material by rotation of the screw to the outside to separate it from the residue. juicing juicer. 5. The method of claim 4,
The juice drum is
an inner module including an inner plate part having both ends open and a plurality of slits formed in the inner plate part; and
An outer plate portion for accommodating the inner module detachably therein, and an outer module including a rib protruding from the inner surface of the outer plate portion to be inserted into the slit of the inner plate portion,
When the outer module surrounds and combines the inner module, a gap is formed between the slit and the rib, which is an outlet hole for discharging the juice to the outside. The method of claim 1,
the screw is
a first module including a plurality of slits; and
and a second module detachably coupled to the first module and including a rib inserted into the slit,
When the first module and the second module are coupled, a gap is formed between the rib and the slit to introduce the separated juice from the outside to the inside. 4. The method of claim 3,
It is disposed between the housing and the screw to surround the screw, and further comprises a juice drum in which an outlet hole is formed for discharging the juice produced by pressing and conveying the material by rotation of the screw to the outside to separate it from the residue. and,
A juicer in which a pressing step or a pressing protrusion is formed at the lower end of the upper housing to press and fix the upper end of the juice drum. The method of claim 1,
A juicer in which one or more crushing engaging jaws protruding in the vertical direction are formed along the circumferential direction on the inner surface of the housing. The method of claim 1,
In the screw, any one of the screw threads is formed to extend to the upper end of the screw body in the form of a spiral, and the screw threads of the upper end of the screw body are formed to protrude horizontally in the radial direction of the screw body to pulverize the material juicer. 10. The method of claim 9,
The inner surface of the housing is a juicer to form a space apart from the screw thread formed on the upper end of the screw body. 11. The method of claim 10,
The housing is a juice juicer that is formed such that the cross-sectional area formed by the inner surface of the housing increases from the portion where the upper end of the screw is located to the upper portion. 12. The method of claim 11,
Juice juicer to form the separation space on one side of the eccentric of the housing. The method of claim 1,
The screw body has a smaller cross-sectional area from the lower part to the upper part, but extends to an eccentric side to form a grinding space for grinding the material input from the upper part. 14. The method of claim 13,
A juicer having a grinding blade extending from the screw body toward the grinding space to grind the material injected into the grinding space.
4. The method of claim 3,
The juicer juicer in which one or more crushing locking jaws protruding in the vertical direction are formed along the circumferential direction on the inner surface of the upper housing. The method of claim 1,
The upper portion of the screw body has a greater width of change in radius according to the height change than the lower portion of the screw body.

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