A hand-operated juicer

Abstract

The present application relates to a hand-operated juicer, characterized in that it comprises a casing, a juicing head with an arc-shaped outer surface and a plurality of outwardly protruding ribs, a top of the juicing head being provided with a transversely arranged insertion rod for hanging fruits, a juicing cover connected to the casing and having an arc-shaped concave pressing cavity in which the juicing head is accommodated, a transmission screw rotatable about its own axis and movable forward and backward, a rear end of the transmission screw being connected to a handle, the juicing head being connected to a front end of the transmission screw and being rotatable and movable forward and backward with the transmission screw, and a juice cup for storing juice. The juicing process is rotary extrusion, and the juicing is more complete with a high juice yield. The juicing path of the juicer is arranged transversely, and a force-saving lever is formed between the handle and the transmission screw, so that the juicing operation is labor-saving. During juicing, the fruits are hung on the insertion rod with the peels outward (facing the juicing cover), and the fruits are fixed without peeling, so that the juicing operation is more convenient.

Description

Technical Field

[0001] This invention relates to a juicer, and more particularly to a hand-cranked juicer. Background Technology

[0002] A juicer is a machine that can quickly extract juice from fruits and vegetables. Based on the power source, it is mainly divided into two types: electric and manual.

[0003] An electric juicer is driven by a motor to produce juice by a high-speed rotating screw. For example, Chinese invention patent application CN201710466647.7 (publication number CN107149380A) discloses a juicer that includes a casing, a juice cup, a lid, an upper pressing head, a lower pressing head, a screw, and a motor. The upper pressing head is installed inside the lid, the top of the screw extends into the juice cup, the lower pressing head is installed at the top of the screw, the juice cup is installed on the casing, and the motor is installed inside the casing and moves up and down within it. A sleeve is provided around the screw, and a nut is movably located inside the sleeve, but the nut cannot rotate with the sleeve. The screw and nut are threaded together. An upper spring is located above the nut, and a lower spring is located below the nut. Both the upper and lower springs are located inside the sleeve and press against the nut. This type of juicer is fast and efficient, but it is expensive and not easy to clean. It also requires removing the fruit peel before juicing, which is time-consuming and laborious. Cleaning it after each use is also very time-consuming.

[0004] Manual juicers primarily extract juice through squeezing, and are mainly used for squeezing juice from fruits and vegetables with high water content, such as oranges, tangerines, watermelons, and tomatoes. For example, Chinese utility model patent application number CN202010812108.6 (publication number CN111972959A) discloses such a juicer, which includes a base, a pressure rod, a transition connecting rod, a lower pressure pin, an I-beam frame, a pressing surface, a pressing cup, and two support frames; the two support frames are respectively installed on both sides of the base. The support frames are hinged to the pressure rod and the I-beam frame, the transition connecting rod is hinged to the I-beam frame, the lower pressure pin is hinged to the I-beam frame, and the lower pressure pin is threadedly connected to the pressing surface. The pressing surface and the pressing cup are in close contact, and the pressing cup is secured within the pressing cup holder. The shape of the pressing cup is adapted to the pressing surface. When using it, the fruits and vegetables are placed between the two squeezing heads, and the user pushes the lever with their hand to squeeze out the juice from the fruits and vegetables. The juice yield is low, and the current manual juicing and squeezing mechanism is very laborious to use, and people with less strength cannot use it.

[0005] In a vertical juicing process, the juice will come into contact with the fruit peel after it overflows. Since the fruit peel is exposed to the outside world more often and is relatively dirty, the overflowing juice will be contaminated by the fruit peel.

[0006] Therefore, existing manual juicers can be further improved. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a hand-cranked juicer with a reasonable structure, high juice yield and easy operation, which is especially suitable for juicing fruits such as oranges, tangerines and lemons, in view of the above-mentioned existing technology.

[0008] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a hand-cranked juicer, characterized in that: it includes a casing; a juicing head, the outer surface of which is arc-shaped and has multiple protruding ribs, and the top of the juicing head is provided with a horizontally arranged insert for hanging fruit; a juicing cover connected to the casing, the juicing cover having an arc-shaped concave pressing chamber, the juicing head being accommodated in the pressing chamber; a transmission screw that can rotate around its own axis and move back and forth, the rear end of the transmission screw being connected to a crank handle, the juicing head being connected to the front end of the transmission screw and being able to rotate and move back and forth with it; and a juice cup for storing juice.

[0009] When the juicer is in normal use, the insert rod and the drive screw are both set horizontally, or in other words, horizontally. The aforementioned forward and backward movement is the horizontal movement.

[0010] Further improvements include multiple inwardly protruding ribs extending from the center to the edge of the pressing chamber's inner wall. Typically, these ribs are radially distributed along the inner wall of the pressing chamber. This arrangement increases the friction between the pressing chamber and the fruit's outer peel, preventing the peel from rotating relative to the chamber. This allows the juicing head to rotate more effectively around its own axis relative to the fruit, resulting in better juicing. The gaps between the spaced-apart ribs facilitate the installation of other structures on the juicing cap.

[0011] To further improve the juicing effect, the aforementioned inner convex ribs are equipped with retaining spikes. These spikes can better hook onto the fruit peel, further ensuring that the peel does not rotate relative to the pressing chamber.

[0012] As an improvement, a transition rib is provided between two adjacent inner ribs. The length of the transition rib is usually shorter than that of the inner rib. The transition rib strengthens the juicing cap and further increases the friction between the pressing chamber and the outer peel of the fruit.

[0013] In a further improvement, the juicing lid is hinged to the housing. When the lid is flipped open, the end of the insert slides out through the groove between two adjacent inner ribs. The groove can be separately cut into the lid, but the simplest solution is that the groove is formed by two adjacent inner ribs, thus eliminating the need for a separate groove. A latch is also provided between the lid and the housing to lock the lid in the closed position. The hinged lid makes opening and closing the lid easier, and combined with the latch structure, it securely fixes the lid to the housing, ensuring a complete and reliable juicing space. Since this juicer operates horizontally as a whole, and both the insert rod and the drive screw are horizontally positioned, the insert rod needs to be of a certain length; otherwise, it cannot hang fruit. This also creates another new problem: when the juicing lid is flipped open, the longer insert rod will always come into contact with the inner wall of the pressing chamber, thus blocking the flipping of the juicing lid. The sliding groove allows the end of the insert rod to pass through and slide out, ensuring that the insert rod does not affect the flipping and opening of the juicing lid.

[0014] Preferably, the inner end of each of the aforementioned inner convex ribs is a certain distance from the center point of the pressing chamber, so that the inner ends of each inner convex rib form a receiving cavity, which is used to accommodate the end of the insert rod. The receiving cavity can accommodate the end of the insert rod, so that the insert rod can be made as long as possible. The longer the insert rod, the easier it is to securely position the fruit on the juicing head, and at the same time, it also avoids the insert rod breaking through the juicing cap during the juicing process.

[0015] If the transmission screw drives the juicing head to move forward too far, the juicing head will burst the juicing cap. However, if the juicing head moves forward too short a distance, it will result in insufficient juicing. To avoid this situation, a further improvement is made by including an elastic component. The elastic component allows the outer surface of the juicing head to retract to the rear when subjected to pressure from the front. This structure creates an elastic connection between the juicing head and the drive screw. During operation, when the distance between the juicing head and the juicing cap is too close, the gap is too small, or the interaction force is too large, the juicing head will overcome the elastic force of the elastic component and move backward relative to the drive screw, preventing the juicing head from further squeezing towards the juicing cap, which could cause the cap to burst or increase the squeezing pressure. This ensures the lifespan of the juicer and allows the operator to feel that operation is easy and effortless, whether in the early or late stages of juicing. When the juicing head can no longer move backward, the drive screw is also ultimately constrained and will no longer move forward relative to the housing. This constraint may be due to the disappearance of the threaded fit between the drive screw and the housing, or the drive screw being constrained by the housing and unable to move forward further. The elastic component can be a spring, sheet metal, torsion spring, rubber pad, air compressor piston, hydraulic piston, foam, or many other materials and components that can deform.

[0016] Alternatively, the juicer head has a cavity, and the elastic member is disposed in the cavity and acts on the drive screw.

[0017] Specifically, a connector is constrained within the aforementioned cavity. The connector and the cavity are keyway-fitted and can slide relative to each other. The front end of the drive screw is inserted into the connector, and the elastic component acts on the connector. This structure facilitates the connection of the juicing head and the drive screw via the elastic component.

[0018] Alternatively, the aforementioned elastic component is located between the juicing head and the drive screw, with one end of the elastic component acting on the juicing head and the other end acting on the drive screw.

[0019] Alternatively, the aforementioned drive screw includes a front section and a rear section, which are slidable relative to each other, and the elastic component acts simultaneously on both the front and rear sections of the drive screw. This structure places the elastic component on the drive screw, creating an elastic connection between the juicing head and the drive screw.

[0020] As an improvement, the aforementioned protruding rib extends from the top of the juicing head towards the edge of the curved surface, and the end of the protruding rib near the insert rod has a recessed portion between it and the insert rod. This structure better ensures that the protruding rib penetrates into the pulp, facilitates the forward advancement of the juicing head during juicing, and also ensures that the fruit is more securely fixed to the juicing head.

[0021] A further improvement includes a sliding locking mechanism with a large and a small interconnected hole. During the juicing process, the drive screw passes through the small hole, and the hole wall engages with the threaded groove of the drive screw. When the drive screw moves backward, it can pass through the large hole, but the hole wall cannot engage with the threaded groove of the drive screw. This design allows the juicing head to quickly retract and reset with the drive screw for the next juicing cycle. During rapid retraction, a force is applied to the locking mechanism, driving it to move in a direction perpendicular to the axis of the transmission screw (i.e., left-right). The transmission screw can pass through the large hole, but the wall of the large hole cannot engage with the threaded groove of the transmission screw rod. The transmission screw and the locking mechanism are no longer in a threaded engagement relationship. Thus, the transmission screw can be directly pulled back to return the juicing head to its original position for the next juicing cycle. During juicing, the force applied to the locking mechanism is stopped, and the locking mechanism resets. The transmission screw passes through the small hole, and the wall of the small hole engages with the threaded groove of the transmission screw rod, achieving a threaded engagement. Rotating the screw then drives the juicing head to rotate and move forward simultaneously. Furthermore, when the juicing head is in its forwardmost position, it is easier to remove the juiced fruit and also easier to install the fruit to be juiced onto the juicing head.

[0022] To facilitate the movement of the drive mechanism, one end of the drive mechanism is connected to a button on the housing, and the other end of the drive mechanism is equipped with a spring that keeps the drive mechanism moving towards the button. The spring ensures that the drive mechanism automatically resets after the external force is removed, creating a threaded connection between the drive screw and the drive mechanism.

[0023] Preferably, the drive screw on the rear side of the clamp has a smooth section. When the drive screw moves forward to the position where the clamp and the smooth section mate, the threaded connection between the drive screw and the clamp disappears. At this time, the drive screw only rotates freely, that is, the rotation of the drive screw will not move forward relative to the housing, thus avoiding the juicing head moving too far forward and damaging the juicing cap.

[0024] Preferably, the small hole is an arc-shaped groove, and the large hole is a rectangular hole, with the arc-shaped groove located on the side wall of the rectangular hole. The arc-shaped groove can better form a threaded drive engagement with the threaded groove, while the rectangular hole has more space. When the drive screw is located in the rectangular hole, the resistance of the drive screw is smaller, and the drive screw retraction is easier.

[0025] To facilitate juice dispensing, the juice cup is inserted into the lower part of the casing. The lower part of the casing has an inlet for the juice cup to enter and exit the chamber. The lower part of the pressing chamber has an inclined flow surface that guides the juice downwards to the juice cup. A latch is provided between the juicing lid and the casing to lock the juicing lid in the closed position. The inclined flow surface allows for better introduction of juice into the juice cup.

[0026] In a further improvement, a bushing is fixed inside the housing, and the transmission screw passes through this bushing. A mounting box is also fixed inside the housing, and the buttons, clips, and springs are all housed within the mounting box. The bushing passes through the mounting box, and a notch is provided on the bushing for the clips to enter. The bushing supports the transmission screw, ensuring that it does not easily shift and that the transmission is smoother. The mounting box provides suitable mounting positions for the buttons, clips, and springs.

[0027] Compared with existing technologies, the advantages of this invention are as follows: This juicer is hand-cranked, making it less expensive than electric juicers; the insert rod design allows for better attachment of fruit to the juicing head. During juicing, the crank handle drives the transmission screw, which rotates and moves forward while engaging with the screw thread, causing the juicing head to rotate and gradually move closer to the juicing cap. The juicing process involves rotational compression, resulting in more thorough juicing and a higher juice yield. The juicing path is horizontally designed, allowing the juice to flow directly downwards into the juice cup without contaminating it, unlike vertical paths. The crank handle and transmission screw form a lever, making juicing easier. The elastic components inside the juicer make juicing easier and more convenient, while also ensuring a longer lifespan. When juicing, oranges, tangerines, and lemons are cut in half, and the pulp end is attached to the insert rod with the peel facing outwards (towards the juicing cap), securing the fruit without needing to peel it, making juicing more convenient. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention (juicing lid open);

[0029] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present invention (juicing lid closed);

[0030] Figure 3 for Figure 2 A cross-sectional view along the height direction;

[0031] Figure 4 This is a three-dimensional structural diagram of an embodiment of the present invention (juicing cap closed, juicing head moved back);

[0032] Figure 5 for Figure 4 A cross-sectional view along the height direction;

[0033] Figure 6 for Figure 2 A sectional view along the front-to-back direction;

[0034] Figure 7 This is a schematic diagram of the small hole of the card fitting being inserted into the threaded groove of the transmission screw in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram showing the transmission screw located inside the large hole of the clamp in an embodiment of the present invention;

[0036] Figure 9 This is a three-dimensional structural diagram of an embodiment of the present invention (juice cup removed).

[0037] Figure 10 This is an exploded view of the connection between the transmission screw and the juicing head in an embodiment of the present invention;

[0038] Figure 11 This is a three-dimensional schematic diagram of the card in an embodiment of the present invention;

[0039] Figure 12 This is a three-dimensional schematic diagram of the juicing cap in an embodiment of the present invention;

[0040] Figure 13 This is a three-dimensional schematic diagram of the bushing in an embodiment of the present invention;

[0041] Figure 14 This is another way of setting the elastic component in an embodiment of the present invention. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0043] like Figures 1-14 The image shown is a preferred embodiment of the present invention.

[0044] A hand-cranked juicer, including

[0045] The machine housing 1 has an inner cavity, and the bottom of the machine housing 1 is equipped with a suction cup for easy and secure fixation to the table.

[0046] Juicing head 2 and juicing cover 3 are hinged to the front opening 12 of the housing 1. A latch 35 is provided between the juicing cover 3 and the housing to lock the juicing cover 3 in the closed position. The outer surface of the juicing head 2 is arc-shaped and has multiple outward ribs 21. The top of the juicing head 2 is provided with a horizontal insertion rod 22 for hanging fruit. The outward ribs 21 extend from the top of the juicing head to the edge of the arc-shaped surface. The end of the outward rib 21 near the insertion rod 22 has a recess 23 between it and the insertion rod 22.

[0047] The juicing cover 3 is connected to the housing 1. The juicing cover 3 has an arc-shaped concave pressing chamber 31, and the juicing head 2 can be accommodated in the pressing chamber 31.

[0048] A transmission screw 5 is capable of rotating around its own axis and moving back and forth. The rear end of the transmission screw 5 is connected to the crank handle 6. The juicing head 2 is connected to the front end of the transmission screw 5 and can rotate and move back and forth with it.

[0049] A juice cup 4 is inserted into the lower part of the casing 1. The lower part of the casing 1 is provided with a cup inlet 11 for the juice cup to enter and exit the inner cavity of the casing, and the lower part of the pressing chamber 31 has a flow surface 37 for guiding the juice downwards to the juice cup 4.

[0050] The inner wall of the pressing chamber 31 is provided with multiple inner convex ribs 32 extending from the center of the pressing chamber 31 to the edge. The inner convex ribs 32 are arc-shaped and radially distributed to match the inner surface of the pressing chamber 31. A transition rib 34 is provided between two adjacent inner convex ribs 32, and the length of the transition rib 34 is less than that of the inner convex rib 32. Both the inner convex ribs 32 and the transition ribs 34 are provided with spurs 33. Two adjacent inner convex ribs 32 form a sliding groove 321. When the juicing cover 3 is flipped open, the end of the insert rod 22 passes through the sliding groove 231 between two adjacent inner convex ribs 32 and can slide out from the sliding groove 321.

[0051] The inner end of the inner rib 32 is a certain distance from the center point of the pressing chamber 31, so that the inner ends of each inner rib 32 form a receiving cavity 36, which is used to receive the end of the insertion rod 22.

[0052] It also includes an elastic component 7, which allows the outer surface of the juicing head 2 to retract to the rear when subjected to pressure from the front. Specifically, a cavity 25 is provided at the rear end of the juicing head 2, and a connector 24 that can slide relative to the juicing head 2 is constrained in the cavity 25. The connector 24 and the cavity 25 on the juicing head 2 are keyed together so that they can rotate synchronously and slide relative to each other. The elastic component 7 acts directly on the connector 24 to keep the connector 24 moving towards the direction of the drive screw 5. The front end of the drive screw 5 is inserted into the connector 24. The rotation of the drive screw 5 can drive the connector 21 and the juicing head 2 to rotate together. The elastic component 7 acts indirectly on the drive screw 5.

[0053] like Figure 14 As shown, the elastic component 7 can also be configured as follows: the transmission screw 5 includes a front section 5a and a rear section 5b. The front section 5a is inserted into the juicing head 2. The front section 5a and the rear section 5b are inserted into a transmission sleeve 5c, which can slide relative to each other and rotate together with the transmission sleeve 5c. The elastic component 7 is located in the transmission sleeve 5c and acts on both the front and rear sections of the transmission screw 5.

[0054] It also includes a sliding retainer 8, which is plate-shaped and tilted to match the threaded groove 51. The retainer 8 has a small hole 81 and a large hole 82 that are interconnected. When the drive screw 5 is rotating and juicing, the drive screw 5 passes through the small hole 81, and the wall of the small hole 81 engages with the threaded groove 51 of the drive screw 5 to achieve a threaded fit. When the drive screw 5 moves backward, the drive screw 5 can pass through the large hole 82, but the wall of the large hole 82 cannot engage with the threaded groove 51 of the drive screw 5. The small hole 81 is an arc-shaped retainer, and the large hole 82 is a rectangular hole, with the arc-shaped retainer located on the side wall of the rectangular hole.

[0055] One end of the locking piece 8 is connected to the button 9 on the housing 1, and the other end of the locking piece 8 is provided with a spring 10 to keep the locking piece 8 moving towards the button 9. A smooth section 52 is provided on the transmission screw 5 at the rear of the locking piece 8. A bushing 13 is fixed inside the housing 1, and the transmission screw 5 passes through the bushing 13. A mounting box 14 is also fixed inside the housing 1. The button 9, the locking piece 8, and the spring 10 are all located inside the mounting box 14. The bushing 13 passes through the mounting box 14, and a notch 131 is provided on the bushing 13 for the locking piece 8 to enter.

[0056] The working principle and process of this juicer are as follows.

[0057] Juicing process: Place the juice cup into the housing 1 through the inlet 11, release the lock 35, flip it downwards, and open the juicing lid 3. Figure 1 As shown, at this time, the juicing head 2 is in the position where it is moved forward and exposed from the front opening 12. The fruit (orange, tangerine, lemon) is cut in half, and the side with pulp hangs on the insert 22. Figure 2 , 3 As shown, close the juicing lid 3; the locking buckle 35 locks the juicing lid 3 in the closed position. Then press button 9; the locking piece 8 moves, and the transmission screw 5 passes through the large hole 82, but the wall of the large hole 82 cannot be engaged in the threaded groove 51 of the transmission screw 5. At this point, the juicing head 2 can quickly retract to the initial position along with the transmission screw 5. Figure 8 As shown; after releasing, the locking piece 8 returns to its original position under the action of the spring 10, and the transmission screw 5 passes through the small hole 81, with the hole wall of the small hole 81 engaging with the threaded groove 51 of the transmission screw 5 to achieve threaded engagement, as shown. Figure 7 As shown. Turning the crank 6 causes the juicing head 2 to rotate along with the transmission screw 5. Under the threaded engagement of the locking piece 8 and the threaded groove 51 of the transmission screw 5, the juicing head 2 rotates and moves towards the juicing cover 3. When the fruit peel is caught by the clasps 33 on the inner convex rib 32 and the transition convex rib 34, it does not easily rotate. At this time, the juicing head 2 will rotate and stir inside the fruit pulp. Combined with the forward movement of the juicing head 2, the fruit is simultaneously subjected to the squeezing force of the juicing cover 3 and the juicing head 2 to complete the juicing process. Figure 2 , 3 As shown in Figure 8, the juicing process is completed while simultaneously stirring and pressing the fruit, resulting in more thorough juicing and a higher juice yield. The juice is guided through the inlet surface 37 into the juice cup 4 located inside the casing 1. After juicing, the juice cup can be removed from the inlet 11. Figure 9 As shown.

[0058] The juicing path of this juicer is set horizontally. Compared with the vertical juicing path, the juice flows directly downward into the juice cup without contaminating the juice. The crank handle 6 and the transmission screw 5 form a force-saving lever, making the juicing operation effortless.

[0059] If the squeezing pressure is too high, the juicing head 2 will overcome the elastic force of the elastic component 7 and move backward and retract relative to the transmission screw 5. At this time, it means that the juicing head 2 will not forcibly continue to move forward to squeeze the juicing cover 3, thus avoiding the hard squeezing between the juicing head 2 and the juicing cover 3 under the action of large squeezing pressure, avoiding the juicing cover from bursting and the squeezing pressure from continuously increasing, making the operation easier and less labor-intensive. When the juicing head continues to rotate and stir the pulp, after consuming some of the pulp and overcoming a certain resistance, the juicing head will continue to move forward to squeeze the fruit and the juicing cover. When the locking component 8 contacts the smooth section 52 of the transmission screw, the juicing head 2 cannot move forward further and will no longer squeeze the juicing cover, thus playing a safety protection role.

[0060] After juicing is complete, release the lock 35, flip it downwards and open the juicing cover 3. The end of the insert rod 22 passes through the groove 321 between two adjacent inner protrusions 32 and slides out from the groove 321. Take out the fruit peel hanging on the insert rod 22, and the juicing is complete.

[0061] It should be noted that in the description of this embodiment, the terms "front," "rear," "left," "right," "inner," "outer," "upper," and "lower," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are merely for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

Claims

1. A hand-cranked juicer, characterized in that: include Casing (1); Juicing head (2), the outer surface of the juicing head (2) is arc-shaped and has multiple outward protruding ribs (21), and the top of the juicing head (2) is provided with a horizontally arranged insert (22) for hanging fruit; A juicing cover (3) is connected to the housing (1), the juicing cover (3) has an arc-shaped concave pressing chamber (31), and the juicing head (2) can be accommodated in the pressing chamber (31); A transmission screw (5) that can rotate around its own axis and move back and forth is provided. The rear end of the transmission screw (5) is connected to the crank handle (6). The juicing head (2) is connected to the front end of the transmission screw (5) and can rotate and move back and forth with it. Juice cup (4) for storing juice; The inner wall of the pressing chamber (31) is provided with multiple inner convex ribs (32) extending from the middle of the pressing chamber (31) to the edge; the juicing cover (3) is hinged to the housing (1), and when the juicing cover (3) is flipped open, the end of the insert rod (22) passes through the sliding groove (321) between two adjacent inner convex ribs (32) and can slide out from the sliding groove (321); it also includes an elastic member (7), which allows the outer surface of the juicing head (2) to retract to the rear when subjected to the squeezing force from the front; It also includes a sliding locking member (8), which has a small hole (81) and a large hole (82) that are interconnected. When the transmission screw (5) is rotating and juicing, the transmission screw (5) passes through the small hole (81), and the hole wall of the small hole (81) is engaged in the threaded groove (51) of the transmission screw (5) to achieve threaded engagement. When the transmission screw (5) moves backward, the transmission screw (5) can pass through the large hole (82), and the hole wall of the large hole (82) cannot be engaged in the threaded groove (51) of the transmission screw (5).

2. The hand-cranked juicer according to claim 1, characterized in that: The inner convex rib (32) is provided with a spiking bar (33).

3. The hand-cranked juicer according to claim 1, characterized in that: A transition rib (34) is provided between two adjacent inner ribs (32).

4. The hand-cranked juicer according to claim 1, characterized in that: The inner end of the inner rib (32) is a certain distance from the center point of the pressing chamber (31), so that the inner ends of each inner rib (32) form a receiving cavity (36), which is used to receive the end of the insertion rod (22).

5. The hand-cranked juicer according to claim 1, characterized in that: The juicing head (2) has a cavity (25), and the elastic member (7) is disposed in the cavity (25) and acts on the transmission screw (5).

6. The hand-cranked juicer according to claim 1, characterized in that: The elastic component (7) is located between the juicing head and the transmission screw (5). One end of the elastic component (7) acts on the juicing head (2), and the other end of the elastic component (7) acts on the transmission screw (5).

7. The hand-cranked juicer according to claim 1, characterized in that: The transmission screw (5) includes a front section and a rear section, which can slide relative to each other. The elastic component (7) acts on both the front and rear sections of the transmission screw (5) simultaneously.

8. The hand-cranked juicer according to claim 1, characterized in that: The protruding rib (21) extends from the top of the juicer head to the edge of the arc surface, and the end of the protruding rib (21) near the insertion rod (22) has a recess (23) between it and the insertion rod (22).

9. The hand-cranked juicer according to claim 1, characterized in that: One end of the card (8) is connected to the button (9) on the housing (1), and the other end of the card (8) is provided with a spring (10) that makes the card (8) move toward the button (9).

10. The hand-cranked juicer according to claim 1, characterized in that: The drive screw (5) on the rear side of the card (8) has a smooth section (52).

11. The hand-cranked juicer according to claim 1, characterized in that: The small hole (81) is an arc-shaped groove, and the large hole (82) is a rectangular hole. The arc-shaped groove is located on the side wall of the rectangular hole.

12. The hand-cranked juicer according to claim 1, characterized in that: The juice cup (4) is inserted into the lower part of the housing (1). The lower part of the housing (1) is provided with a cup inlet (11) for the juice cup to enter and exit the inner cavity of the housing (1). The lower part of the pressing chamber (31) has an inclined flow surface (37) for guiding the juice downward to the juice cup (4). The juicing cover (3) is provided with a latch (35) between it and the housing to lock the juicing cover (3) in the closed position.

13. The hand-cranked juicer according to claim 5, characterized in that: The cavity (25) contains a connector (24), which is keyed to the cavity (25) and can slide back and forth relative to each other. The front end of the transmission screw (5) is inserted into the connector (24), and the elastic component (7) acts on the connector (24).

14. The hand-cranked juicer according to claim 13, characterized in that: A bushing (13) is fixed inside the housing (1), and the transmission screw (5) passes through the bushing (13). A mounting box (14) is also fixed inside the housing (1). The button (9), the clip (8), and the spring (10) are all located inside the mounting box (14). The bushing (13) passes through the mounting box (14), and a notch (131) is opened on the bushing (13) for the clip (8) to enter.

Images