CN209966040U

CN209966040U - Fruit juice preparing device

Info

Publication number: CN209966040U
Application number: CN201822058302.0U
Authority: CN
Inventors: 刘晓飞
Original assignee: Beijing Gravel Technology Co Ltd
Current assignee: Beijing Gravel Technology Co Ltd
Priority date: 2018-12-09
Filing date: 2018-12-09
Publication date: 2020-01-21
Anticipated expiration: 2028-12-09

Abstract

The utility model discloses a fruit juice preparation device, which is used for scraping pulp inside fruits to prepare juice and comprises an installation base body, a motor and a bending cutter bar, wherein the motor is fixed on the installation base body, the motor comprises a main shaft, the main shaft comprises an installation section, an extension section and a cutter installation section which are arranged in sequence, the main shaft is fixed on a rotor of the motor through the installation section, and the extension section and the cutter installation section of the main shaft extend out of the motor; the bending knife strip comprises an open ring knife body and a connecting portion, the open ring knife body is provided with an opening, the connecting portion is arranged inside or at the tail end of a ring of the open ring knife body, the bending knife strip is fixed on a knife installation section of the pipette shaft through the connecting portion, so that the knife installation section of the pipette shaft is located inside the ring of the open ring knife body, and a preset distance is reserved between the open ring knife body and the surface of the knife installation section.

Description

Fruit juice preparing device

Technical Field

The utility model belongs to the technical field of the fruit juice is prepared, especially, relate to a device is prepared to fruit juice.

Background

Fruits such as oranges, lemons and grapefruits are generally prepared by cutting the fruit into pieces and then crushing the cut pieces at a high speed, or by cutting the fruit into halves and then squeezing the cut pieces on a raised die. The cutting or shredding of the fruit can cause the juice to drip onto the chopping board, knives and the hands of the operator, causing waste of the juice and the hassle of requiring cleaning.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a device is prepared to fruit juice, and the device is prepared to fruit juice can be at the inside pulp system juice of scraping of fruit.

The first aspect provides a fruit juice preparation device, which is used for crushing pulp inside a fruit and comprises an installation base body, a motor and a bent cutter bar, wherein the motor is fixed on the installation base body and comprises a main shaft, the main shaft comprises an installation section, an extension section and a cutter installation section which are sequentially arranged, the main shaft is fixed on a rotor of the motor through the installation section, and the extension section and the cutter installation section of the main shaft extend out of the motor; the bending knife strip comprises an open ring knife body and a connecting portion, the open ring knife body is provided with an opening, the connecting portion is arranged inside or at the tail end of a ring of the open ring knife body, the bending knife strip is fixed on a knife installation section of the pipette shaft through the connecting portion, so that the knife installation section of the pipette shaft is located inside the ring of the open ring knife body, and a preset distance is reserved between the open ring knife body and the surface of the knife installation section.

In a first possible implementation, the main shaft is a hollow shaft.

With reference to the foregoing possible implementation manners, in a second possible implementation manner, the main shaft further includes an outlet section, the outlet section is continuously connected to the mounting section, and the outlet section protrudes out of the motor.

In combination with the above possible implementation manners, in a third possible implementation manner, the tool holder further includes a protection mechanism, the protection mechanism includes a protection component, the protection component includes an installation portion and a protection portion, the protection component is disposed on the main shaft through the installation portion, the protection component is movable along the axial direction of the main shaft, and the protection portion circumferentially surrounds the curved tool section by using the main shaft as a center.

In a fourth possible implementation manner, in combination with the above possible implementation manners, the protection portion is a dome-shaped cover or a protection cylinder, and the dome-shaped cover or the protection cylinder surrounds at least the highest part of the curved blade bar protruding from the main shaft.

With reference to the foregoing possible implementation manners, in a fifth possible implementation manner, the protection member is a disk body, a central hole, a yielding groove communicated with the central hole, and an outer circumferential surface are disposed on the disk body, the central hole is an installation portion, a solid structure between the outer circumferential surface and the yielding groove is a protection portion, and the yielding groove extends from the central hole to the radial direction of the disk body and does not penetrate through the outer circumferential surface of the disk body; the disk body is sleeved on the main shaft through the central hole and can move along the axial direction of the main shaft so as to enable the abdicating groove to be inlaid or separated with the bent cutter strip.

In a sixth possible implementation manner, in combination with the above possible implementation manners, the tray body is flat or dome-shaped.

With reference to the foregoing possible implementation manners, in a seventh possible implementation manner, the protection mechanism further includes a reset mechanism, the reset mechanism connects the protection member and the mounting base, and the reset mechanism can move or elastically deform through the mechanism to allow the protection member to move and reset along the axial direction of the main shaft.

In an eighth possible implementation manner, in combination with the above possible implementation manners, the return mechanism is a spring, and the spring connects the guard member and the mounting base to hold the guard member at the bent blade bar.

In combination with the above possible implementations, in a ninth possible implementation, the spring is a coil spring.

In combination with the above possible implementations, in a tenth possible implementation, the spring is sleeved outside the main shaft.

With reference to the foregoing possible implementation manner, in an eleventh possible implementation manner, the reset mechanism includes at least one movable rod set, the movable rod set includes a first rod, a second rod and an elastic element, the first rod is hinged to the mounting base, one end of the second rod is hinged to the first rod, the other end of the second rod is hinged to the protection member, the elastic element is disposed between the first rod and the second rod, and the elastic element can be tensioned when an opening angle between the first rod and the second rod is reduced.

In a twelfth possible implementation manner, in combination with the above possible implementation manners, the elastic member is a torsion spring, a coil spring, or an elastic band.

In combination with the above possible implementation manners, in a thirteenth possible implementation manner, the reset mechanism includes a reset spring and a reset rod, the reset rod is limited on the mounting base body and can slide along a direction parallel to the main shaft, and the protective member can drive the reset rod to slide and compress the reset spring when approaching the mounting base body along the direction parallel to the main shaft.

In combination with the above possible implementation manners, in a fourteenth possible implementation manner, one end of the reset rod is connected to the protection member, and the protection member can be linked with the reset rod.

With reference to the foregoing possible implementation manners, in a fifteenth possible implementation manner, a guide hole is disposed on the mounting base, and at least one section of the reset rod is disposed in the guide hole and can slide in the guide hole.

In combination with the above possible implementations, in a sixteenth possible implementation, the return spring is disposed in the guide hole of the mounting base and can be compressed by the return rod.

In combination with the above possible implementation manners, in a seventeenth possible implementation manner, the safety protection device further comprises a safety switch, the safety switch is arranged on the installation base body, the safety switch is a normally open switch and is connected in series in the rotation-driven circuit, and the protection member can drive the reset rod to trigger the safety switch when approaching to the installation base body along the main axial direction.

With reference to the foregoing possible implementation manners, in an eighteenth possible implementation manner, the safety switch mechanism further includes a safety switch, and the safety switch mechanism includes a safety switch and a trigger member. The safety switch is arranged on the installation base body, is a normally open switch and is connected in series in the rotation driving circuit; the trigger component is connected with the protective component, and the protective component can drive the trigger component to axially move or deform along the main shaft when moving along the main shaft so as to start or close the safety switch.

With reference to the foregoing possible implementation manners, in a nineteenth possible implementation manner, the triggering member is a triggering rod, one end of the triggering rod is connected to the protection member, and the other end of the triggering rod can be driven by the protection member when moving along the axial direction of the main shaft to start or close the switch.

In combination with the above possible implementations, in a twentieth possible implementation, the trigger member is a spring, one end of the spring is connected to the guard member, and the other end of the spring is capable of triggering the switch when the spring is compressed to a predetermined length.

With reference to the foregoing possible implementation manners, in a twenty-first possible implementation manner, the portable electronic device further includes a safety switch mechanism, where the safety switch mechanism includes a switch and a trigger member. The safety switch is arranged on the installation base body, is a normally open switch and is connected in series in the rotation driving circuit; the trigger component is arranged on the mounting base body or the main shaft and can move or deform along the axial direction of the main shaft when being acted by external force so as to start or close the switch.

In a twenty-second possible implementation manner in combination with the above possible implementation manner, the trigger member is a trigger rod that is provided so as to be movable on the mounting base body in the axial direction of the spindle.

In a twenty-third possible implementation manner in combination with the above possible implementation manner, the triggering member is a spring, one end of the spring is connected to the switch, and the spring is capable of triggering the switch when being compressed to a predetermined length.

In combination with the above possible implementations, in a twenty-fourth possible implementation, the spring is sleeved on the outer periphery of the main shaft.

With reference to the foregoing possible implementation manners, in a twenty-fifth possible implementation manner, the curved blade bar is an arc-shaped blade bar or a zigzag-shaped blade bar.

In a twenty-sixth possible implementation manner in combination with the above possible implementation manners, the split ring cutter body of the bending cutter bar is an open circular ring or a U-shaped ring.

With reference to the foregoing possible implementation manners, in a twenty-seventh possible implementation manner, the spindle further includes a sleeve, and the sleeve is fixed to the mounting base and sleeved outside the outlet section of the spindle.

In combination with the above possible implementations, in a twenty-eighth possible implementation, the curved blade bar is an elastic blade bar.

In a second aspect, a shield member is provided that includes a disk body, a central aperture, and a relief groove. The tray body is provided with an outer peripheral surface; the central hole is arranged in the center of the disc body and is an installation part; the abdicating groove extends from the central hole to the radial direction of the disk body and does not penetrate through the outer circumferential surface of the disk body.

In a first possible implementation, the disk body is a flat plate-like disk or a dome-shaped disk.

The embodiment of the utility model provides a device is prepared to fruit juice can be in the inside operation of squeezing the juice of fruit, and the rotary motion through crooked sword strip realizes preparing fruit juice, reducible juice water trickling to the abundant scraping of pulp.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a juice producing device according to one embodiment of the present invention;

FIG. 2 is a cross-sectional view of the juice producing device of FIG. 1;

FIG. 3 is a sectional view taken along line A-A in FIG. 2;

FIG. 4 is an enlarged partial view I of FIG. 3;

fig. 5 is a schematic structural view of a protection mechanism according to another embodiment of the present invention;

fig. 6 is a schematic view of a partial structure of a juice producing device according to another embodiment of the present invention;

FIG. 7 is a cross-sectional view of the juice producing device of FIG. 6;

fig. 8 is a schematic structural view of a curved blade according to another embodiment of the present invention;

fig. 9 is a schematic structural view of a curved blade according to another embodiment of the present invention;

wherein:

100-mounting base, 120-drive mounting, 130-hole;

200. 200 a-main shaft, 210 a-outlet section, 220-mounting section, 230-extension section, 240-cutter mounting section;

310. 310 a-motor, 311 a-rotor, 312 a-stator, 313 a-hollow shaft,

400-bending blade, 410b, 410 c-opening ring blade, 421b, 421 c-first mounting portion, 422b, 422 c-second mounting portion, 411-outer surface, 412-inner surface, 413-first side, 414-second side;

500. 500 a-guard mechanism, 510 a-guard member, 511 a-central hole, 512 a-abdicating groove, 513 a-outer circumference; 520-movable bar group, 521-first bar, 522-second bar, 523-elastic member;

600. 600 a-safety switch mechanism, 610 a-safety switch, 620 a-trigger member, 630-return spring, 630 a-spring;

900-sleeve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The present invention is in no way limited to any specific structure or arrangement set forth below, but rather covers any modification, replacement or improvement of parts, features and connections without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1 is a schematic view of a juice preparing apparatus according to an embodiment of the present invention, fig. 2 is a sectional view of the juice preparing apparatus of fig. 1, fig. 3 is a sectional view taken along a line a-a of fig. 2, and fig. 4 is an enlarged view of a portion I of fig. 3.

In this embodiment, the juice preparing apparatus includes a mounting base 100, a motor 310, a curved blade bar 400, a guard mechanism 500, and a safety switch mechanism 600. The motor 310 is fixed to the mounting base 100. The motor 310 includes a main shaft 200, and the main shaft 200 is a hollow shaft passing therethrough. Spindle 200 includes outlet section 210, mounting section 220, extension section 230, and tool mounting section 240, arranged in series. The main shaft 200 is coaxially fixed to a hollow shaft 313 of the motor 310 by the mounting section 220, and is fixed to the rotor 311 by the hollow shaft 313. The extension 230 and the tool mounting section 240 of the spindle 200 protrude outside the motor 310.

The bent blade bar 400 includes an open ring blade body 410, a first mounting portion 421, and a second mounting portion 422. The open ring cutter body 410 is a major arc ring having an opening, and the two ends of the opening are a first mounting portion 421 and a second mounting portion 422, respectively.

Both ends of the main spindle 200 protrude out of the mounting base body 100, and one end thereof is provided with a bent blade bar 400, i.e., the outlet section 210 partially protrudes from one end of the mounting base body 100, and the extension section 230 and the tool mounting section 240 protrude from the other end of the mounting base body 100. The revolving motion of the curved blade bar 400 around the spindle 200 when the spindle 200 rotates causes the curved blade bar 400 to form a revolving envelope surface protruding from the surface of the spindle 200.

In this embodiment, the main shaft 200 is a hollow shaft and can be used as a suction pipe.

The juice preparing apparatus further includes a main switch (not shown) provided on an outer surface of the mounting base 100 and actively operated by an operator to be turned on or off. The motor 310 can be rotated when the main switch and the safety switch 610 in the safety switch mechanism 600 are simultaneously in the on state.

When the fruit cutting machine is used, a user can insert one end of the main shaft 200, which is provided with the bent blade bar 400, into a fruit, then the motor 310 is started to drive the main shaft 200 to rotate, and the bent blade bar 400 can cut the surrounding pulp in the rotation process; the user holds the mounting base 100, stirs the end of the main shaft 200, at which the curved blade 400 is disposed, inside the fruit (continuously changes the angle and depth of the main shaft 200 entering the fruit), and cuts the pulp inside the fruit by the curved blade 400, thereby making the pulp into juice inside the fruit. In this embodiment, the main shaft 200 is a hollow shaft and corresponds to a suction pipe, so that juice can be directly sucked through the end of the main shaft 200 protruding out of the mounting base 100 after juice preparation.

The mounting base 100 is further provided with a sleeve 900, and the sleeve 900 is sleeved on the periphery of the outlet section 210 of the main shaft 200. The sleeve 900 surrounds the outlet section 210 of the main shaft 200 and does not rotate along with the main shaft 200, so that the main shaft 200 can be prevented from being in contact with human bodies or objects to cause tangling when rotating. The sleeve 900 may be in sealing contact with the outlet section 210 of the spindle 200 to prevent juice from entering the apparatus along the gap therebetween and to prevent air leakage from the gap therebetween during juice consumption. The sealing contact mode can be provided with a dynamic sealing ring and the like.

The juice preparing apparatus of the present embodiment will be described in detail below.

The mounting base 100 has a substantially cylindrical shape and is used to mount components such as a motor, a switch, and a circuit board, and the outer surface of the mounting base 100 is held by a user. The side wall of the mounting base 100 is also provided with a hole 130, the opening of the hole 130 is arranged on the end face of the mounting base 100, and the hole 130 is a blind hole. The side wall of the hole 130 is also provided with an opening, which is located near the orifice of the hole 130.

The driving installation part 120 is a cavity surrounded by a housing and having an opening at one end for the motor 310 to be placed in during an assembling process. In alternative embodiments, the drive mounting portion 120 may be provided without a cylindrical housing, with only one mounting plate, and the motor or other drive mechanism may be mounted on the mounting plate, as the motor generally has a relatively smooth outer surface, and may be held by an operator.

The side wall of the mounting base body 100 is further provided with a hole 130, the hole 130 is parallel to the axis of the spindle of the motor 310, the opening of the hole 130 is arranged on the end face of the mounting base body 100 and is the end face of the protruding end of the extending section 230, and the hole 130 is a blind hole. The sidewall of the hole 130 is also provided with an opening near the opening of the hole 130 for inserting the button of the switch in the safety switch mechanism 600 into the inside of the hole 130.

Motor 310 includes rotor 311, stator 312, main shaft 200, and hollow shaft 313. The hollow shaft 313 has a through cavity in the middle for the main shaft 200 to pass through, and is tightly fitted with the main shaft 200 to transmit torque therebetween. In the embodiment, the main shaft 200 and the hollow shaft 313 together form a shaft of the motor 310, and the two can be regarded as an integral structure; in some alternative embodiments, the hollow shaft 313 may not be provided and the main shaft 200 may be directly connected to the rotor 311, which may have the same effect as the previous embodiments.

The main shaft 200 includes an outlet section 210, a mounting section 220, an extension section 230 and a cutter mounting section 240 which are sequentially arranged, and has a through inner cavity, and the main shaft 200 can be used as a suction pipe for sucking liquid. The spindle 200 in this embodiment is a unitary structure and may be machined from a tube or shaft piece. The outlet section 210 of the spindle 200 projects beyond an end of the mounting base 100 for a user to enter. The mounting section 220 is used for a fixed connection to the hollow shaft 313. The extension 230 and the cutter mounting section 240 protrude from the other end of the mounting base 100, and the cutter mounting section 240 is used for mounting the bent blade bar 400, and the bent blade bar 400 and the extension 230 and the cutter mounting section 240 can rotate and agitate in the fruit.

The tool mounting section 240 is used to secure the curved blade bar 400. The cutter mounting section 240 is a shaft body at the end of the main shaft 200, and the length of the shaft body can be set according to the diameter value of the fruit to be processed, for example, if the juice preparing device is used for processing oranges in this embodiment, the total length of the extension section 230 of the main shaft 200 and the cutter mounting section 240 is equal to or not less than the diameter of the oranges, and the length of the cutter mounting section 240 should be less than the diameter of the oranges, and can be set to be one third of the diameter of the oranges. The total length of the extension 230 and the cutter mounting section 240 may be set to be slightly larger than the diameter of the orange (a statistical value, which may be an average value or a median value, etc.), so that the bending blade 400 can be sufficiently deep inside the fruit.

The main shaft 200 in this embodiment is a cylindrical shaft, and in some alternative embodiments, the main shaft may also be a structure such as a quadrangular prism or a hexagonal prism. In this embodiment, the main shaft 200 is a hollow shaft, and can be used as a suction pipe, and in some alternative embodiments, the main shaft 200 can also be a solid shaft; in other alternative embodiments, the spindle 200 may also be provided without the outlet section 210, and juice may be sucked through the spindle by a suction tube; alternatively, main shaft 200 may also be a solid shaft without outlet section 210.

The bent blade bar 400 includes an open ring blade body 410, a first mounting portion 421, and a second mounting portion 422. The open ring cutter body 410 is a major arc ring having an opening, and the two ends of the opening are a first mounting portion 421 and a second mounting portion 422, respectively. The bending blade 400 is fixed to the cutter mounting section 240 of the pipette shaft 200 by the first and second mounting

parts

421 and 422 such that the cutter mounting section 240 of the pipette shaft 200 is located inside the ring of the open ring cutter body 410, and the diameter of the open ring cutter body 410 is greater than that of the pipette shaft 200 with a predetermined distance between the surfaces of the open ring cutter body 410 and the cutter mounting section 240. Also, the open ring cutter 410 protrudes from the end surface of the straw shaft 200, and the portion of the open ring cutter 410 protruding from the end surface of the straw shaft 200 may have a cutting function when the straw shaft 200 rotates.

When the main shaft 200 rotates, the curved blade 400 rotates along with the main shaft 200, and the area swept by the arc-shaped blade forms a spherical surface, that is, the curved blade 400 can form a revolution envelope surface protruding out of the surface of the main shaft 200 when rotating around the main shaft 200.

The radius of gyration of the curved blade bar 400 is less than the fruit radius and may be, for example, one-third, one-fourth, or other value of the fruit radius. In this way, the fruit is only required to be provided with a hole having a diameter equivalent to the diameter of the curved blade 400 in rotation, and the curved blade 400 can enter the fruit with a small resistance and does not receive a large rotation resistance during rotation. Meanwhile, the provision of the extension 230 allows the curved blade bar 400 to be freely agitated within the fruit, and also more sufficiently treats the pulp within the fruit.

The body of the curved blade bar 400 includes 4 faces, an outer surface 411, an inner surface 412, a first side 413, and a second side 414. The inner surface 412 is substantially parallel to the outer surface 411 and is closer to the spindle 200 than the outer surface 411. The first side 413 meets the inner surface 412 and forms an edge that is less than 90 degrees, and the second side 414 meets the inner surface 412 and forms an edge that is less than 90 degrees.

The blade formed between the inner surface 412 and the first side 413 and the blade formed between the inner surface 412 and the second side 414 are located between the outer surface 411 and the main shaft 200, and the cutting edge of the blade is not located on the outermost surface of the envelope of revolution, so that the blade is not easy to damage harder pericarp, and the blade can not significantly affect the cutting of softer pulp. Because the pulp is soft, the first side surface 413 and the second side surface 414 can extrude the pulp to a certain extent, so that the density of the extruded pulp is increased, and the pulp can be cut by the blade. Meanwhile, the first side 413 and the second side 414 can press out juice in the pulp when pressing the pulp, and the juice yield can be increased.

In some alternative embodiments, the cross-section of the curved blade bar 400 may also be triangular, i.e., the curved blade bar 400 includes only an inner surface 412, a first side 413, and a second side 414, with the first side 413 interfacing with the second side 414. The inner surface 412 and the first side surface 413 are acute angles, the inner surface 412 and the second side surface 414 are acute angles, and the first side surface 413 and the second side surface 414 are obtuse angles. The first side 413 and the second side 414 are at an obtuse angle, and the blade can scrape the fruit flesh, but the fruit peel is not easily damaged due to the large angle and the direction of the cutting edge perpendicular to the cutting feed direction.

When the lower end of the main shaft 200 and the curved blade 400 are located inside the fruit, the curved blade 400 scrapes the pulp located on its sweeping path when the main shaft 200 rotates. The main shaft 200 is oscillated with respect to the fruit space while the main shaft 200 is rotated, and the inside of the fruit is inserted to different depths so that the curved blade bar 400 contacts the pulp as much as possible, thereby gradually scraping the pulp from the center of the fruit to between the peels. The pulp scraped by the curved blade 400 and the juice squeezed therefrom remain inside the fruit without an additional container. The main shaft 200 is a hollow shaft, and is equivalent to a suction pipe, and can directly suck the juice from one end of the outlet section 210 of the main shaft 200. By using the fruit juice preparation device provided by the embodiment, most of the fruit pulp can be exposed without cutting the orange, and the fruit pulp can be processed in the orange, so that the fruit juice can not flow greatly, the pollution of the fruit juice to a cutter, a chopping board and the hand of an operator is reduced, and the cleaning work and the using amount of cleaning water can be obviously reduced.

In alternative embodiments, the curved blade bars may also have other shapes, such as the configurations shown in fig. 7 and 8. The bent blade bar 400b shown in fig. 7 has an open ring blade body 410b, a first mounting portion 421b, and a second mounting portion 422 b. The open ring cutter body 410b is a major arc ring having an opening through which the cutter mounting section 240 of the pipette shaft 200 can be inserted into the interior of the ring body when assembled with the pipette shaft 200. Unlike the previous embodiment, both ends of the open ring blade body 410b are not provided with the connection/mounting portions for connecting the pipette shaft 200, and the first mounting portion 421b and the second mounting portion 422b are provided inside the open ring blade body 410b at positions to be contactable with the outer edges of the end surfaces of the tool mounting section 240. The curved blade bar 400c in fig. 8 has an open ring blade body 410c, a first mounting portion 421c, and a second mounting portion 422 c. The open ring cutter body 410c is a U-shaped ring structure with an opening for insertion of the cutter mounting segment 240 into the ring. The first and second mounting

portions

421c and 422c are two protruding plates provided in the open ring cutter body 410c for connecting the open ring cutter body 410c to the surface of the cutter mounting section 240. The bottom of the open ring cutter body 410c (the bend of the U-shaped ring structure) protrudes beyond the end face of the cutter mounting section 240.

To improve the safety of the juice making device, the juice making device may further comprise a guard mechanism 500. The protection mechanism 500 includes a protection member 510, the protection member 510 has a disc shape, the disc is provided with a central hole 511, a relief groove 512 communicated with the central hole 511, and an outer circumferential surface 513, a cylindrical structure with equal inner diameter is surrounded around the central hole 511, and the cylindrical structure has a larger contact area with the spindle 200, so that a better guiding effect can be achieved, and the protection member 510 can slide along the spindle 200 more smoothly. The relief groove 512 communicates with the central hole 511 and penetrates the cylindrical structure surrounding the central hole 511 in the axial direction. The avoiding groove 512 is an elongated groove with a width slightly larger than that of the curved blade bar 400 and is used for the curved blade bar 400 to pass through; in some alternative embodiments, the relief groove 512 may also be a hollow structure with a sector shape, a circular shape, or other shapes. The central hole 511 and the cylindrical structure are mounting portions of the shield member 510, and the outer circumferential surface 513 is a shield portion. The guard member 510 is sleeved to the main shaft 200 through the center hole 511. The guard member 510 is axially movable along the spindle 200 when subjected to a force acting axially along the spindle 200 to move the portion of the bent blade strip 400 between its ends into and out of the relief groove 512 of the guard member 510. The protective member 510 in this embodiment cannot completely surround the curved blade section 400 in the axial direction, and the outer circumferential surface 513 can surround the highest portion of the curved blade section 400 protruding from the spindle 200. Generally, the highest point of the curved blade strip 400 relative to the circumferential surface of the main shaft 200 is more likely to contact objects around the main shaft 200, and the linear velocity of the highest point is the highest when the main shaft 200 rotates, so that the risk of accidental damage to the blade body can be greatly reduced by surrounding the blade body from the circumferential direction through the outer circumferential surface 513 of the protective member 510. Of course, the guard member 510 may be a cylindrical structure capable of completely circumferentially surrounding the curved blade bar 400, which is more secure but may significantly increase the length requirement of the spindle 200.

When the juice preparing device is not used, the guard member 510 is held at the end of the main shaft 200, and the curved blade bar 400 is located in the relief groove 512 of the guard member 510. Since the outer circumferential surface 513 of the guard member 510 has a diameter larger than that of the curved blade bar 400 and a smooth surface surrounding the curved blade bar 400, it is possible to prevent the curved blade bar 400 from causing physical damage to the human body when the juice preparing apparatus is erroneously started.

When the fruit juice preparing device is used, a hole with the diameter smaller than that of the protective component 510 is firstly formed on the fruit, and the bent blade 400 is inserted into the fruit through the hole of the fruit. During the process of the curved blade bar 400 entering the inside of the fruit, the protective member 510 blocked by the opening part peel can slide along the main shaft 200 to approach the mounting base body 100 and leave the area where the curved blade bar 400 is located, i.e. the curved blade bar 400 is separated from the abdicating groove 512 of the protective member 510 and stays at the extension 230 of the main shaft 200. The guard member 510 does not rotate with the main shaft 200 while the curved blade 400 rotates with the main shaft 200, and remains outside the fruit at all times. The arrangement enables dangerous parts in the revolving part to be positioned inside the fruit, and ensures the safety of operators.

In this embodiment, the guard member 510 is a planar disk having a smaller axial dimension. In use, the protective member 510 cannot enter the inside of the fruit after the curved blade bar 400 is inserted into the fruit, and as the curved blade bar 400 goes deep into the fruit, the protective member 510 moves on the main shaft 200 and approaches the mounting base 100 under the pushing force of the fruit, a part of the extension 230 enters the inside of the fruit, another part stays outside the fruit, and the protective member 510 also keeps the part of the extension 230 staying outside the fruit. If the guard member 510 is cylindrical in shape, and its axial dimension is large, a large length of the extension 230 is required to accommodate the guard member 510. The protection member 510 is a hollow-out planar disk structure, which can not only realize the protection function, but also reduce the axial space of the extension section 230, so that the main shaft 200 has a shorter length and the juice making device has a smaller size.

The guard mechanism 500 may be configured to be held at the position of the bent blade bar 400 by the gravity of the guard member 510, may be manually slid by a user to the position of the bent blade bar 400, or may be configured to hold the guard member 510 at the bent blade bar 400 by a return mechanism so that the guard member 510 can be automatically returned to the position of the bent blade bar 400 in the absence of an external force (e.g., when the bent blade bar 400 is withdrawn from a fruit). The reset mechanism may be a spring sleeved on the main shaft 200, one end of the spring is connected or abutted against the protection member 510, and the other end of the spring is connected with the mounting base 100. In this embodiment, the guard member 510 is provided to be linked with the safety switch mechanism 600 so as to be held at the position of the curved blade bar 400. The following description will be made in conjunction with a specific structure of the safety switch mechanism 600.

The safety switch mechanism 600 includes a safety switch 610, a trigger member 620 and a return spring 630. The safety switch 610 is a normally open switch and is connected in series to a rotation driving circuit (not shown), when the safety switch 610 is in an off state, the motor 310 cannot be started, and the main shaft 200 cannot drive the bending blade 400 to rotate.

The mounting base 100 is provided with a hole 130, and the hole 130 is a blind hole. The side wall of the hole 130 is provided with a hole for passing a button of the safety switch 610. The safety switch 610 is disposed in the mounting base 100, and the button of the safety switch 610 may extend from the hole on the sidewall of the hole 130 to the hole 130. The return spring 630 is disposed inside the hole 130, one end of which abuts against the bottom of the hole 130 and the other end of which is used for receiving an external force, and the return spring 630 is used for returning the trigger member 620. The trigger member 620 is coaxial with the bore 130 and is free to access the bore 130.

The triggering member 620 is used to trigger or turn off the safety switch 610, and the triggering member 620 can activate or turn off the safety switch 610 when it is moved or deformed in a direction parallel to the main shaft 200. The trigger member 620 may be triggered by an external force, for example, the trigger member 620 may be configured to contact the outer surface of the fruit when the bending blade 400 enters the fruit to a certain depth, and the trigger member 620 is deformed or moved by the pressure of the outer surface of the fruit to apply a force to the safety switch 610 when the bending blade 400 further enters the interior of the fruit. In this embodiment, the triggering member 620 is a triggering rod, one end of which is connected to the shielding member 510 and the other end of which is located in the hole 130. The trigger member 620 is capable of moving with the guard member 510 and into or out of the bore 130 as the guard member 510 moves axially along the main shaft 200, thereby applying a force or withdrawing a force to the button of the safety switch 610 to effect activation or deactivation of the safety switch 610. The end face of the trigger rod, which can enter the hole 130, is an inclined plane (end face not perpendicular to the rod axis), and when the trigger rod enters the hole 130 along the axis of the hole 130, the inclined plane can drive the button of the safety switch 610 to move along the direction perpendicular to the axis of the hole 130, which is equivalent to pressing the button, so that the safety switch 610 is switched on; when the trigger lever moves outward along the axis of the bore 130, the safety switch 610 opens when it comes out of contact with the button of the safety switch 610, thus breaking the circuit of the motor 310. The hole 130 in the mounting base 100, in addition to receiving the return spring 630 and the trigger lever, also provides a guide for the movement of the trigger lever.

The trigger member 620 is coupled to the guard member 510, and the reset of the trigger member 620 also drives the guard member 510 to reset, so the return spring 630 and the trigger member 620 are also the reset mechanism (return spring and reset lever) of the guard mechanism 500. In addition, the triggering member 620 is connected to the protection member 510, and both of them can form a rigid body, and the cooperation between the triggering rod and the hole 130 and the cooperation between the protection member 510 and the main shaft 200 can generate a guiding function for the rigid body, so that both of them can slide more smoothly.

Of course, the reset mechanism is not limited to the structure described in the foregoing description, and the reset lever (the trigger member 620) does not necessarily need to be guided by the hole 130 (the guide hole) of the mounting base 100, as long as the reset lever can be constrained on the mounting base 100 and can slide along the axial direction of the main shaft 200, for example, two or more coaxial rings with a certain distance can be provided on the surface of the mounting base 100, and the reset lever can move in the ring hole.

In the above-described embodiment, the reset rod is coupled to the shielding member 510 by one end thereof to realize the linkage with the shielding member, but the coupling between the reset rod and the shielding member 510 is not necessary, for example, the reset rod and the shielding member 510 may be in abutting contact, the shielding member 510 may also drive the reset rod to move when approaching the mounting base 100 along the main shaft 200, and the reset rod may also drive the shielding member 510 to reset when moving towards the end of the main shaft 200 under the action of the reset spring 630.

In some alternative embodiments, the return spring 630 may also be disposed not in the bore 130, such as may be disposed on the spindle 200. The return spring 630 may drive the guard member 510 to return, and since the guard member 510 is linked to the trigger member 620, the trigger member 620 may also be driven to return when the guard member 510 returns.

In some alternative embodiments, the triggering member 620 may be replaced by a spring, one end of which is connected to the guard member 510, and the other end of which directly or indirectly acts on a triggering button of the safety switch (correspondingly, the pressing or bouncing direction of the button of the safety switch is set to be axial along the main shaft 200), and the button of the safety switch can be pressed down to trigger the switch when the spring is compressed to a predetermined length. The spring may be fitted around the outer circumferential surface of the main shaft 200, or may be disposed parallel to the main shaft 200 at one side of the main shaft 200.

In this embodiment, the guard mechanism 500 is configured to be capable of linking with the safety switch mechanism 600, that is, when a part of the members in the guard mechanism 500 moves along the axial direction of the main shaft 200, the part of the members in the safety switch mechanism 600 can be driven to move, and the two are configured to link to simplify the structure of the juice preparing device, but not to fulfill the necessary condition for preparing juice. In other alternative embodiments, the guard mechanism 500 and the safety switch mechanism 600 may also be individually actuated.

The juice producing device in this embodiment further comprises a battery (not shown) for supplying power to the motor 310. In some alternative embodiments, the juice preparing device is not provided with a battery, but is provided with a power supply interface instead of the battery, and the motor 310 can be powered by the connection of an external power supply and the power supply interface. The size and mass of the juice making device without batteries can be significantly reduced.

The complete operation of the juice preparation device is described below.

A hole of a diameter corresponding to the curved blade 400 is made in the outer surface of a fruit such as an orange, or a part of the peel of the fruit is cut off, leaving a part of the flesh exposed or nearly exposed. The operator holds the mounting base 100 and inserts the extension 230 of the main shaft 200, the tool mounting section 240, and the curved blade 400 into the interior of the fruit. In this process, the guard member 510 cannot enter the interior of the fruit, and therefore the guard member 510 slides along the main shaft 200 and disengages from the curved blade bar 400. At the same time, the guard member 510 drives the trigger member 620 to move in a direction parallel to the main shaft 200, when the curved blade 400 is completely inserted into the main shaft, the slope of the top end of the trigger member 620 triggers the safety switch 610, and at this time, the operator turns on the main switch, the motor 310 drives the main shaft 200 to rotate, and the curved blade 400 starts to scrape the pulp around the curved blade. The operator can change the depth and angle of the main shaft 200 into the interior of the fruit, thereby enabling the curved blade bar 400 to scrape most of the pulp inside the fruit.

After the pulp processing is completed, the operator closes the main switch and sucks the juice from the end of the outlet section 210 of the main shaft 200.

After the operator finishes eating the food, the main shaft 200 is withdrawn from the fruit, and the trigger member 620 gradually protrudes from the hole 130 by the return spring 630, and drives the guard member 510 to slide toward the position of the curved blade bar 400. When the triggering member 620 is finally reset, the slope of one end of the triggering member 620 is separated from the contact of the safety switch 610 to turn off the safety switch 610; the guard member 510 reaches the position of the curved blade bar 400 and envelops the curved blade bar 400. When the curved blade 400 is pulled out of the fruit, if the operator accidentally triggers the main switch, the motor 310 will not be started because the safety switch 610 is in the off state. Moreover, even if the circuit is connected due to a failure, since one end of the trigger 620 is still located in the hole 130 of the mounting base 100 and the other end is fixed to the protective member 510, the rotation of the spindle 200 is hindered, the bent blade strip 400 is prevented from rotating to cause a danger, and the safety factor is further increased.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a guard mechanism according to another embodiment of the present invention, and the structure of the curved blade bar 400 is not shown in the figure in order to show the structure of the guard mechanism more clearly. The protection mechanism comprises a protection component 510 and a reset mechanism, the reset mechanism comprises two movable rod groups 520, each movable rod group 520 comprises a first rod 521, a second rod 522 and an elastic piece 523, the first rods 521 are hinged to the installation base body 100, one end of each second rod 522 is hinged to the first rods 521, the other end of each second rod 522 is hinged to the protection component 510, the elastic pieces 523 are arranged between the first rods 521 and the second rods 522, and the elastic pieces 523 can be tensioned when the opening angle between the first rods 521 and the second rods 522 is reduced. The initial angle between the first 521 and second 522 rods is less than 180 degrees.

The elastic member 523 is a torsion spring in this embodiment, and is connected to the hinge of the first lever 521 and the second lever 522. When the protection member 510 approaches the mounting base 100 along the spindle 200, the protection member 510 drives the movable rod group 520 to move, so that the included angle between the first rod 521 and the second rod 522 is reduced, the stress in the torsion spring is increased, and a reset force is generated, when the force for driving the protection member 510 to approach the mounting base 100 disappears, the elastic member 523 can drive the first rod 521 to open relative to the second rod 522, and the movable rod group 520 can drive the protection member 510 to reset to the position of the curved blade bar 400.

In other embodiments, the movable rod set 520 and the safety switch mechanism 600 may be linked, for example, a lever or a cam may be disposed on the first rod 521, such that the lever or the cam can press a button of the safety switch 610 when the first rod 521 rotates to a certain angle.

In some alternative embodiments, the elastic member 523 may also be a tension spring or a compression spring. The spring can be extended or compressed to accumulate energy when the angle between the first 521 and second 522 levers is changed.

In other alternative embodiments, the elastic member 523 may also be an elastic band, which can be stretched to store energy when the angle between the first rod 521 and the second rod 522 is reduced.

Fig. 6 is a schematic view of a partial structure of a juice preparing apparatus according to another embodiment of the present invention, and fig. 7 is a sectional view of the juice preparing apparatus of fig. 6. The juice preparing device shown in fig. 6 and 7 has substantially the same structure as the juice preparing device described in the previous embodiment, except for the structure of the safety switch mechanism and the guard mechanism, which will be described in detail below with reference to the accompanying drawings.

In this embodiment, the juice preparation device includes the following structure: the mounting base body 100, the main shaft 200, the rotary driving, the bending cutter bar 400, the protection mechanism 500a and the safety switch mechanism 600 a. The connection relationship among the main shaft 200, the rotary driving and bending blade 400 and the connection relationship between them and the mounting base 100 are the same as those of the juice preparing apparatus shown in fig. 2, and the detailed structure can be referred to the description of the previous embodiment.

In this embodiment, the guard mechanism 500a includes a guard member 510a and a spring 630a, and the safety switch mechanism 600a includes a safety switch 610a and a trigger member 620 a.

The main body of the protection member 510a is a dome-shaped (umbrella-shaped) disk, the disk is provided with a center hole 511a, a relief groove 512a communicating with the center hole 511a, and an outer circumferential surface 513a, a cylindrical structure with a uniform inner diameter is surrounded around the center hole 511a, and a larger shaft hole contact area is provided between the cylindrical structure and the main shaft 200. The relief groove 512a communicates with the center hole 511a and does not penetrate the cylindrical structure surrounding the center hole 511a in the axial direction. The central hole 511a and the barrel structure are installation parts of the shielding member 510a, and the solid structure between the outer circumferential surface 513a and the receding groove 512a is a shielding part. The shield member 510a is fitted to the main shaft 200 through the center hole 511 a. The guard member 510a is axially movable along the spindle 200 when subjected to a force acting in the axial direction of the spindle 200 to move the body portion of the bent blade bar 400 between the ends thereof into and out of the relief groove 512a of the guard member 510 a. Since the relief groove 512a does not penetrate the cylindrical structure surrounding the central hole 511a in the axial direction, the shield member 510a is prevented from falling off the main shaft 200 by the cylindrical structure when moving toward the end of the main shaft 200.

The spring 630a is fitted over the main shaft 200 between the shield member 510a and the mounting base 100, and the shield member 510a compresses the spring 630a when moving along the main shaft 200 to approach the mounting base 100.

The safety switch 610a is provided on the mounting base 100 with the push and pop directions of the switch knob parallel to the axial direction of the spindle 200.

The trigger member 620a includes a sleeve portion and a pressing portion, the pressing portion protrudes from an outer circumferential surface of the sleeve portion along a radial direction of the sleeve portion, and a recess portion for engaging with a button of the safety switch 610a is further provided on the pressing portion. The sleeve portion has a sleeve inner diameter equal to the diameter of the spindle 200, and the trigger member 620a is fitted over the spindle 200 through the sleeve portion and located between the spring 630a and the mounting base 100. The pressing portion of the triggering member 620a is inserted into the button of the safety switch 610a through the recess, and the triggering member 620a is prevented from rotating out of contact with the safety switch 610 a. When the trigger member 620a moves closer to the mounting base 100 along the spindle 200, the pressing portion thereof can trigger the safety switch 610 a.

The shield member 510a is capable of compressing the spring 630a as it moves along the spindle 200 toward the mounting base 100, the spring 630a acting on the trigger member 620a, the spring 630a having sufficient stress to drive the trigger member 620a to depress the button of the safety switch 610a when the shield member 510a moves to a predetermined position (which may be when the shield member 510a is fully disengaged from the curved blade bar 400), thereby causing the safety switch 610a to close.

In some alternative embodiments, the tab portion of the trigger member 620a may also be a flange that surrounds the sleeve portion so that the guard member 510a does not come out of contact with the safety switch 610a even if it is rotated. In other alternative embodiments, the spring 630a may be disposed on one side of the main shaft 200 (not sleeved on the main shaft 200), and the spring 630a may be a button having one end directly connected to the disc of the shielding member 510a and the other end capable of driving the pressing piece of the triggering member 620a or directly driving the safety switch 610 a.

In some embodiments, it is also possible not to provide the triggering member 620a, but to enable the spring 630a to directly contact the safety switch 610a by placing the safety switch 610a in a suitable position (e.g., closer to the main shaft 200), so that the spring 630a can directly trigger the safety switch 610 a.

The embodiment of the utility model discloses still disclose a protective member, its concrete structure refers to protective member 510, protective member 510a and corresponding embodiment in fig. 1 to 6. In order to improve the safety of the juice making device, the juice making device may further include a protective member 510, the main body of the protective member 510 is a disc, the disc is provided with a central hole 511, a relief groove 512 communicated with the central hole 511 and an outer circumferential surface 513, a cylinder structure with a uniform inner diameter is surrounded around the central hole 511, the cylinder structure and the main shaft 200 have a larger contact area, so that a better guiding effect can be achieved, and the protective member 510 can slide along the main shaft 200 more smoothly. The relief groove 512 communicates with the central hole 511 and penetrates the cylindrical structure surrounding the central hole 511 in the axial direction. The avoiding groove 512 is an elongated groove with a width slightly larger than that of the curved blade bar 400 and is used for the curved blade bar 400 to pass through; in some alternative embodiments, the relief groove 512 may also be a hollow structure with a sector shape, a circular shape, or other shapes. The central hole 511 and the cylindrical structure are mounting portions of the shield member 510, and the outer circumferential surface 513 is a shield portion. The guard member 510 is sleeved to the main shaft 200 through the center hole 511. The guard member 510 is axially movable along the spindle 200 when subjected to a force acting axially along the spindle 200 to move the portion of the bent blade strip 400 between its ends into and out of the relief groove 512 of the guard member 510. The protective member 510 in this embodiment cannot completely surround the curved blade section 400 in the axial direction, and the outer circumferential surface 513 can surround the highest portion of the curved blade section 400 protruding from the spindle 200. Generally, the highest point of the curved blade strip 400 relative to the circumferential surface of the main shaft 200 is more likely to contact objects around the main shaft 200, and the linear velocity of the highest point is the highest when the main shaft 200 rotates, so that the risk of accidental damage to the blade body can be greatly reduced by surrounding the blade body from the circumferential direction through the outer circumferential surface 513 of the protective member 510. Of course, the guard member 510 may be a cylindrical structure capable of completely circumferentially surrounding the curved blade bar 400, which is more secure but may significantly increase the length requirement of the spindle 200.

When the juice preparing device is not used, the guard member 510 is held at the end of the main shaft 200, and the curved blade bar 400 is located in the relief groove 512 of the guard member 510. Since the 3 outer circumferential surface 513 of the guard member 510 has a diameter larger than that of the curved blade bar 400 and a smooth surface surrounding the curved blade bar 400, it is possible to prevent the curved blade bar 400 from causing physical damage to the human body when the juice preparing apparatus is erroneously started.

The guard mechanism 500 may be configured to be held at the position of the bent blade bar 400 by the gravity of the guard member 510, may be manually slid by a user to the position of the bent blade bar 400, or may be configured to hold the guard member 510 at the bent blade bar 400 by a return mechanism so that the guard member 510 can be automatically returned to the position of the bent blade bar 400 in the absence of an external force (e.g., when the bent blade bar 400 is withdrawn from a fruit). The reset mechanism may be a spring sleeved on the main shaft 200, one end of the spring is connected or abutted against the protection member 510, and the other end of the spring is connected with the mounting base 100.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A juice preparation device for breaking pulp inside a fruit, comprising:

installing a base body;

the motor is fixed on the mounting base body and comprises a main shaft, the main shaft comprises a mounting section, an extension section and a cutter mounting section which are sequentially arranged, the main shaft is fixed on a rotor of the motor through the mounting section, and the extension section and the cutter mounting section of the main shaft extend out of the motor; and

the bending tool comprises an open ring tool body and a connecting part, wherein the open ring tool body is provided with an opening, the connecting part is arranged in the ring of the open ring tool body or at the tail end of the open ring tool body, the bending tool is fixed on a tool mounting section of the main shaft through the connecting part, so that the tool mounting section of the main shaft is positioned in the ring of the open ring tool body, and a preset distance is reserved between the open ring tool body and the surface of the tool mounting section; and

protection machanism, protection machanism includes the protection component, the protection component includes installation department and guard portion, the protection component passes through the installation department set up in on the main shaft, the protection component is followed main shaft axial movable, the guard portion with the main shaft encircles as central circumference crooked sword strip.

2. Juice making device according to claim 1, characterized in that said guard is a dome or a protective cylinder, which encloses at least the highest part of the curved blade projecting from the main shaft.

3. The juice preparing device according to claim 2, wherein the protecting member is a disk body, the disk body is provided with a central hole, a receding groove communicated with the central hole, and an outer circumferential surface, the central hole is the mounting portion, the solid structure between the outer circumferential surface and the receding groove is the protecting portion, and the receding groove extends from the central hole to the radial direction of the disk body and does not penetrate through the outer circumferential surface of the disk body; the disk body is sleeved on the main shaft through the central hole and can move along the axial direction of the main shaft so as to enable the abdicating groove to be embedded or separated with the bent cutter strip.

4. The juice extraction device according to claim 3, wherein said tray is flat or domed.

5. The juice producing device according to claim 1, wherein said guard means further comprises a return means, said return means connecting said guard member and said mounting base, said return means being movable or elastically deformable by means of a mechanism allowing said guard member to move and return axially along said spindle.

6. The juice making apparatus according to claim 5, wherein said return mechanism is a spring connecting said guard member and said mounting base to retain said guard member at said curved blade.

7. Juice making device according to claim 6, characterized in that said spring is a helical spring.

8. The juice extraction device according to claim 7, wherein said spring is mounted around said spindle.

9. Juice making device according to claim 5, characterized in that said return means comprise at least one set of movable levers comprising a first lever hinged to said mounting base, a second lever hinged at one end to said first lever and at the other end to said guard member, and an elastic element interposed between said first lever and said second lever, capable of tensioning said elastic element when the opening angle between said first lever and said second lever becomes smaller.

10. Juice making device according to claim 9, characterized in that said elastic element is a torsion spring, a helical spring or an elastic band.

11. The juice producing device according to claim 5, wherein said return mechanism comprises a return spring and a return rod, said return rod being constrained to said mounting base and being slidable in a direction parallel to said main shaft, said guard member being able to drive said return rod to slide and compress said return spring when approaching said mounting base in a direction parallel to said main shaft.

12. The juice producing device according to claim 11, wherein said return arm is connected at one end to said guard member, said guard member being capable of being interlocked with said return arm.

13. The juice producing device according to claim 11, wherein said mounting base has a guide hole therein, and at least a segment of said reset lever is slidably disposed in said guide hole.

14. The juice producing device according to claim 13, wherein said return spring is disposed in a guide hole of said mounting base and is compressible by said return rod.

15. The juice producing device according to claim 11, further comprising a safety switch disposed on said mounting base, said safety switch being a normally open switch and connected in series in the electrical circuit of said motor, said guard member being capable of driving said reset lever to activate said safety switch when said guard member is moved toward said mounting base along said main axis.

16. The juice extraction device according to claim 1, further comprising a safety switch mechanism, said safety switch mechanism comprising:

the safety switch is arranged on the installation base body, is a normally open switch and is connected in series in a circuit of the motor; and

the trigger component is connected to the protection component, and the protection component can drive the trigger component to axially move or deform along the main shaft when moving along the main shaft so as to start or close the safety switch.

17. The juice making apparatus according to claim 16, wherein said trigger member is a trigger rod, one end of said trigger rod being connected to said guard member, the other end of said trigger rod being actuatable by said guard member upon axial movement along said spindle to activate or deactivate said switch.

18. The juice making apparatus according to claim 16, wherein said trigger member is a spring, one end of said spring being connected to said guard member, the other end of said spring being capable of triggering said switch when said spring is compressed to a predetermined length.

19. The juice extraction device according to claim 1, further comprising a safety switch mechanism, said safety switch mechanism comprising:

the trigger component is arranged on the mounting base body or the main shaft and can move or deform along the axial direction of the main shaft when being acted by external force so as to start or close the switch.

20. Juice making device according to claim 19, characterized in that the trigger member is a trigger rod arranged to be movable on the mounting base in the axial direction of the spindle.

21. The juice making apparatus according to claim 19, wherein said trigger member is a spring, one end of said spring being connected to said switch, said spring being capable of triggering said switch when compressed to a predetermined length.

22. The juice extraction device according to claim 21, wherein said spring is mounted around the periphery of said spindle.

23. The juice extraction device according to any of claims 1 to 22, wherein the curved blade is an arcuate blade or a dog-leg blade.

24. The juice extraction device according to any of claims 1 to 22, wherein the body of the split ring of the curved blade bar is an open circular ring or a U-shaped ring.

25. The juice extraction device according to any of claims 1 to 22, further comprising a sleeve secured to said mounting base and fitted over said outlet section of said spindle.

26. The juice extraction device according to any one of claims 1 to 22, wherein the curved blade is a resilient blade.