CN110422489B - Paste extrusion device - Google Patents

Abstract

The invention discloses a paste extrusion device, which relates to the technical field of storage or transportation devices and comprises a cylindrical shell and a sleeved shell, wherein an interlayer is formed between the cylindrical shell and the shell and is used for filling paste, a spiral sleeve is arranged in the cylindrical shell, a pressing rod is arranged in the spiral sleeve in a penetrating manner, the periphery of the spiral sleeve is in threaded connection with an annular pressing plate, the annular pressing plate stretches into the interlayer, the pressing rod can enable the spiral sleeve and the cylindrical shell to rotate relatively and extrude the interlayer space through the opening end of the cylindrical shell, a first tooth-shaped structure is arranged at the bottom of the spiral sleeve, a second tooth-shaped structure meshed with the first tooth-shaped structure is arranged in the cylindrical shell, a plunger is fixedly connected to the bottom of the second tooth-shaped structure, a first elastic piece is sleeved on the plunger, an inner cavity sleeve is further fixed at the bottom of the cylindrical shell, the inner cavity sleeve is communicated with the interlayer, and an extrusion opening is arranged at the bottom of the inner cavity sleeve. The paste extrusion device can extrude quantitative paste in a single time, and the extrusion opening is plugged after the paste is extruded, so that the paste extrusion device is convenient to use, safe and sanitary.

Description

Paste extrusion device

Technical Field

The invention relates to the technical field of storage or transportation devices, in particular to a paste extrusion device.

Background technique

In people's daily life, containers are often needed to store and take out various substances in different states, such as liquids, powders or pastes. In addition to satisfying the good preservation function, the storage container also needs to be able to conveniently and hygienically take out the stored substances. For liquid and powder substances, they can be conveniently poured out from the mouth of the container by tilting the container, but for paste substances, due to their viscosity and strong adhesion, the existing technology often requires squeezing to squeeze them out.

Taking the commonly used toothpaste in life as an example, most of the commonly used toothpaste extrusion devices in the prior art are external, that is, a structure for squeezing out the toothpaste is arranged outside the original toothpaste tube structure. When in use, the actual extruded amount of the toothpaste is adjusted by controlling the squeezing force. For users of different ages and physical conditions, different squeezing forces may cause excessive waste in a single extrusion or difficulty in squeezing.

There are also devices in the prior art that extrude paste by setting an internal and external pressure difference, presetting a fixed working stroke, and being able to extrude a fixed amount of paste in a single operation, thereby reducing the effort required during operation and avoiding waste caused by excessive extrusion. However, the extrusion devices in the prior art do not have a structure that can automatically close the outlet at the outlet position. On the one hand, the paste at the outlet position is prone to hardening and deterioration, and on the other hand, the problem of secondary contamination cannot be avoided during multiple uses.

Summary of the invention

The object of the present invention is to provide a paste extruding device which can automatically close an outlet after the paste is extruded.

The embodiment of the present invention is achieved as follows:

A paste extrusion device comprises a cylindrical shell with an open top and a hollow interior, an outer shell is sleeved on the outside of the cylindrical shell, and an interlayer is formed between the cylindrical shell and the outer shell for filling the paste, a spiral sleeve is arranged in the cylindrical shell, a pressure rod is arranged in the spiral sleeve, the outer circumference of the spiral sleeve is threadedly connected with an annular pressing plate, the annular pressing plate extends into the interlayer, and pressing the pressure rod can make the spiral sleeve and the cylindrical shell rotate relative to each other in a spiral manner and squeeze the space of the interlayer by the open end of the cylindrical shell, a first tooth-shaped structure is fixedly arranged at the bottom of the spiral sleeve, a second tooth-shaped structure that can mesh with the first tooth-shaped structure is also arranged in the cylindrical shell, a plunger is fixedly connected to the bottom of the second tooth-shaped structure, a first elastic member is sleeved on the columnar outer wall of the plunger, an inner cavity sleeve is also fixedly connected to the bottom of the cylindrical shell, the inner cavity sleeve is communicated with the interlayer, an extrusion port is arranged at the bottom of the inner cavity sleeve, and the paste entering the inner cavity sleeve through the interlayer can be discharged from the extrusion port under the pushing of the plunger.

In a preferred embodiment of the present invention, a spiral guide groove is processed on the inner wall of the spiral sleeve, and the spiral guide groove takes the top end of the spiral sleeve as the starting end. A protrusion is provided on the side wall of the pressure rod, and the protrusion corresponds to the starting end of the spiral guide groove. When the pressure rod is pressed, the spiral sleeve rotates to make the protrusion slide from the starting end of the spiral guide groove to the tail end.

In a preferred embodiment of the present invention, the spiral sleeve is connected to the cylindrical shell through a bearing, the outer ring of the bearing is fixedly connected to the inner wall of the cylindrical shell, and the inner ring of the bearing is fixedly connected to the spiral sleeve.

In a preferred embodiment of the present invention, a gap layer is formed between the spiral sleeve and the cylindrical shell, and the bearing is connected to the gap layer.

In a preferred embodiment of the present invention, a through groove is processed on the side wall of the cylindrical shell along the pressing direction of the pressure rod, and the annular pressure plate includes a nut and a pressure plate connected to the nut through a connecting portion, the connecting portion is located in the through groove, and the nut is threadedly connected to the outer wall of the spiral sleeve.

In a preferred embodiment of the present invention, the first toothed structure and the second toothed structure are both circular toothed discs, and a plurality of teeth are evenly distributed in the circumferential direction on the surfaces of the opposite sides of the first toothed structure and the second toothed structure. The first toothed structure and the second toothed structure rotate relative to each other, and the plurality of teeth on the two circular toothed discs engage with each other or the tooth tips abut against each other.

In a preferred embodiment of the present invention, the longitudinal sections of the plurality of teeth are all trapezoidal shapes extending outward from the circular toothed disc.

In a preferred embodiment of the present invention, a second elastic member is provided at the bottom end of the pressure rod, one end of the second elastic member abuts against the bottom surface of the pressure rod, and the other end abuts against the top surface of the first toothed structure, the raised portion of the side wall of the pressure rod slides out from the tail end of the spiral guide groove, and the second elastic member pushes the pressure rod to return to its initial position.

In a preferred embodiment of the present invention, an elastic sealing layer is sleeved on the outer wall of the cylindrical shell, and a pre-cut line is formed on the elastic sealing layer at a position corresponding to the through groove.

In a preferred embodiment of the present invention, the side wall of the inner cavity sleeve is connected to the interlayer through a connecting channel, and the connecting channels include a plurality of connecting channels, which are evenly distributed along the circumference of the same cross section of the side wall of the inner cavity sleeve.

The beneficial effects of the embodiments of the present invention include: the embodiments of the present invention provide a paste extrusion device, including a cylindrical shell with an opening at the top and a hollow interior, an outer shell is provided on the outside of the cylindrical shell, an interlayer is formed between the cylindrical shell and the outer shell for filling the paste, a spiral sleeve is provided in the cylindrical shell, a pressure rod is provided in the spiral sleeve, an annular pressure plate is connected to the outer circumference of the spiral sleeve, and the annular pressure plate extends into the interlayer, and the paste extrusion device of the embodiment of the present invention has a plunger that is completely blocked in the inner cavity sleeve and covers the extrusion port in a normal state, thereby avoiding the contact and contamination of the paste in the interlayer with the outside air. A first tooth-shaped structure is fixedly provided at the bottom of the spiral sleeve, and a second tooth-shaped structure that can mesh with the first tooth-shaped structure is also provided in the cylindrical shell, and the first tooth-shaped structure rotates with the rotation of the spiral sleeve, so that the first tooth-shaped structure and the second tooth-shaped structure alternate in a state of mutual meshing and tooth tip relative to each other. A plunger is fixedly connected to the bottom of the second tooth-shaped structure, and the columnar outer wall of the plunger is sleeved with a first elastic member. The bottom of the cylindrical shell is also fixedly connected to an inner cavity sleeve, which is connected to the interlayer, and an extrusion port is arranged at the bottom of the inner cavity sleeve. When in use, by pressing the end of the pressure rod exposed outside the cylindrical shell, the pressure rod is pressed down to make the spiral sleeve and the cylindrical shell rotate relative to each other, the first tooth-shaped structure rotates and is in a bite state with the second tooth-shaped structure, and the second tooth-shaped structure drives the plunger to move in the direction of the first tooth-shaped structure under the driving action of the first elastic member to expose part of the cavity of the inner cavity sleeve, the annular pressing plate and the spiral sleeve rotate relative to each other, and the annular pressing plate moves downward relative to the spiral sleeve to squeeze the space of the interlayer. Part of the paste enters the inner cavity sleeve through the interlayer and fills the cavity part. As the first tooth-shaped structure and the second tooth-shaped structure continue to rotate relative to each other until the tooth tips are relative, the second tooth-shaped structure drives the plunger to press down, and the plunger discharges the paste in the cavity of the inner cavity sleeve from the extrusion port, and the plunger blocks the extrusion port to avoid contamination of the internal paste. In this way, the paste extrusion device of the embodiment of the present invention can extrude a quantitative paste by pressing, and seal the extrusion port at the same time after the paste is extruded, which is easy to use and safe and hygienic.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

FIG1 is a schematic structural diagram of an initial state of a paste extrusion device according to an embodiment of the present invention;

FIG2 is a schematic structural diagram of a paste extrusion device in a filling state according to an embodiment of the present invention;

3 is a schematic diagram of the motion relationship between the pressure rod and the spiral sleeve in the paste extrusion device according to an embodiment of the present invention;

FIG4 is a schematic structural diagram of an annular pressing plate in a paste extrusion device according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a first tooth-shaped structure in a paste extrusion device according to an embodiment of the present invention.

Icons: 100 - paste extrusion device; 10 - interlayer; 11 - cylindrical shell; 12 - outer shell; 13 - bearing; 14 - gap layer; 20 - spiral sleeve; 21 - spiral guide groove; 30 - pressure rod; 31 - raised portion; 40 - annular pressure plate; 41 - nut; 42 - connecting portion; 43 - pressure plate; 51 - first tooth structure; 511 - tooth; 52 - second tooth structure; 60 - plunger; 70 - first elastic member; 80 - inner cavity sleeve; 81 - support portion; a - extrusion port.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

Referring to FIG. 1 , an embodiment of the present invention provides a paste extrusion device 100, comprising a cylindrical shell 11 with an opening at the top and a hollow interior, an outer shell 12 being provided on the outside of the cylindrical shell 11, and an interlayer 10 for filling paste is formed between the cylindrical shell 11 and the outer shell 12, a spiral sleeve 20 is provided in the cylindrical shell 11, and a pressure rod 30 is provided in the spiral sleeve 20, and an annular pressure plate 40 is connected to the outer circumference of the spiral sleeve 20 by a thread, and the annular pressure plate 40 is extended into the interlayer 10, and pressing the pressure rod 30 can make the spiral sleeve 20 and the cylindrical shell 11 rotate relative to each other in a spiral manner and be opened by the opening of the cylindrical shell 11. The space of the interlayer 10 is extruded at the mouth end, and a first tooth-shaped structure 51 is fixedly arranged at the bottom of the spiral sleeve 20. A second tooth-shaped structure 52 that can mesh with the first tooth-shaped structure 51 is also arranged in the cylindrical shell 11. A plunger 60 is fixedly connected to the bottom of the second tooth-shaped structure 52. The columnar outer wall of the plunger 60 is sleeved with a first elastic member 70. An inner cavity sleeve 80 is also fixedly connected to the bottom of the cylindrical shell 11. The inner cavity sleeve 80 is communicated with the interlayer 10, and an extrusion port a is arranged at the bottom of the inner cavity sleeve 80. The paste that enters the inner cavity sleeve 80 through the interlayer 10 can be discharged from the extrusion port a under the pushing of the plunger 60.

The paste extrusion device 100 of the embodiment of the present invention includes an initial state in which the plunger 60 blocks the extrusion port a of the inner cavity sleeve 80, and a filling state in which the plunger 60 retracts to expose a portion of the cavity of the inner cavity sleeve 80 after the pressure rod 30 is pressed. A paste extrusion process of pressing the pressure rod 30 includes entering the filling state from the initial state, and then the plunger 60 extends into the inner cavity sleeve 80 again to extrude the paste in the inner cavity sleeve 80 from the extrusion port a, thereby returning to the initial state again. The working principle and process of the paste extrusion device 100 of the embodiment of the present invention are specifically described below for a complete paste extrusion process.

The paste extrusion device 100 of the embodiment of the present invention is in the initial state as shown in Figure 1, with the first tooth structure 51 and the second tooth structure 52 in a state where the tooth tips are facing each other, the first elastic member 70 is in a compressed state to accumulate elastic potential energy, and the plunger 60 completely fills the internal cavity of the inner sleeve 80 and blocks the extrusion port a.

When the paste in the interlayer 10 needs to be squeezed out for use, the end of the pressure rod 30 exposed outside the cylindrical shell 11 is pressed, and the pressure rod 30 and the spiral sleeve 20 rotate relative to each other, wherein the pressure rod 30 moves linearly downward along the length direction of the spiral sleeve 20, and the spiral sleeve 20 rotates to form a spiral rotation relationship between the two. The first toothed structure 51 fixedly connected to the spiral sleeve 20 rotates with the rotation of the spiral sleeve 20, and the tooth tips of the first toothed structure 51 are staggered with the tooth tips of the second toothed structure 52. After the tooth tips of the second toothed structure 52 lose the force of resisting, the first elastic member 70 releases elastic potential energy, pushing the second toothed structure 52 to move toward the direction of the first toothed structure 51, so that the first toothed structure 51 and the second toothed structure 52 are in a bite state, and at the same time, the plunger 60 exposes part of the cavity of the inner cavity sleeve 80 as the second toothed structure 52 moves toward the first toothed structure 51. During the above-mentioned pressing process, the annular pressure plate 40 is threadedly connected to the spiral sleeve 20, and the spiral sleeve 20 rotates so that the annular pressure plate 40 moves downward relative to the spiral sleeve 20. The annular pressure plate 40 extends into the internal space of the interlayer 10 and partially squeezes the interlayer 10. The paste is subjected to the squeezing force, and part of the paste passes through the connecting position and enters the partial cavity in the inner cavity sleeve 80 exposed by the withdrawal of the plunger 60 from the interlayer 10, and enters the filling state of the paste extrusion device 100 of the embodiment of the present invention, as shown in Figure 2.

As the spiral sleeve 20 rotates further, the first toothed structure 51 rotates and gradually disengages from the bite state between the first toothed structure 51 and the second toothed structure 52, and enters the state where the tooth tips of the first toothed structure 51 and the second toothed structure 52 are opposite to each other again. During the process of the first toothed structure 51 rotating and disengaging from the bite state, the second toothed structure 52 is pushed downward and the first elastic member 70 is compressed, and the plunger 60 is pressed into the part of the inner cavity sleeve 80, and the paste entering the inner cavity sleeve 80 in the filling state is squeezed out from the extrusion port a, and the extrusion port a is blocked. The force pressing the pressure rod 30 is removed, and the paste extrusion device 100 of the embodiment of the present invention returns to the initial state.

It should be noted that, first, after the pressing rod 30 is pressed to squeeze out the paste and the plunger 60 re-blocks the extrusion port a of the inner cavity sleeve 80, the pressing rod 30 can be provided with an elastic member so that the elastic member accumulates elastic potential energy when the pressing rod 30 is pressed, and after the force pressing the pressing rod 30 is removed, the elastic member releases the elastic potential energy and pushes the pressing rod 30 back to its original position. Alternatively, the rebound structure may not be provided, and after the pressing rod 30 is pressed and the paste is squeezed out, the pressing rod 30 is manually pulled up so that the pressing rod 30 returns to its original position.

Second, in the paste extrusion device 100 of the embodiment of the present invention, the paste to be extruded filled inside is located in the interlayer 10 between the cylindrical shell 11 and the outer shell 12, wherein the top of the interlayer 10 can be a closed structure, and the annular pressing plate 40 is located in the closed structure, or the annular pressing plate 40 can be used as the top of the interlayer 10. That is, when the paste extrusion device 100 of the embodiment of the present invention is not in use, the annular pressing plate 40 is located at the top of the interlayer 10, so that the interlayer 10 is in a state of maximum volume. As the number of times of pressing and using increases, the annular pressing plate 40 gradually squeezes and shrinks the space of the interlayer 10 until the annular pressing plate 40 moves down to the bottom of the interlayer 10. The above are two exemplary embodiments. The embodiment of the present invention does not specifically limit the arrangement of the annular pressing plate 40 in the interlayer 10, as long as the paste is closed and located in the space of the interlayer 10, and can be squeezed as the interlayer 10 moves down and enters the space of the inner cavity sleeve 80 through the bottom channel.

Third, the paste extrusion device 100 of the embodiment of the present invention does not impose any special restrictions on the specific structures of the first tooth-shaped structure 51 and the second tooth-shaped structure 52, as long as it is ensured that under the rotation of the first tooth-shaped structure 51, the first tooth-shaped structure 51 and the second tooth-shaped structure 52 can alternate between the biting state and the tooth tip relative state.

The beneficial effects of the embodiments of the present invention include: the embodiments of the present invention provide a paste extrusion device, including a cylindrical shell 11 with an opening at the top and a hollow interior, an outer shell 12 is provided on the outside of the cylindrical shell 11, and an interlayer 10 is formed between the cylindrical shell 11 and the outer shell 12 for filling the paste, a spiral sleeve 20 is provided in the cylindrical shell 11, a pressure rod 30 is provided in the spiral sleeve 20, the outer peripheral thread of the spiral sleeve 20 is connected to an annular pressure plate 40, and the annular pressure plate 40 extends into the interlayer 10. In the paste extrusion device 100 of the embodiment of the present invention, in the normal state, the plunger 60 is completely blocked in the inner cavity sleeve 80 and covers the extrusion port a, thereby avoiding the contact and contamination of the paste in the interlayer 10 with the outside air. A first toothed structure 51 is fixedly provided at the bottom of the spiral sleeve 20, and a second toothed structure 52 which can mesh with the first toothed structure 51 is also provided in the cylindrical shell 11. The first toothed structure 51 rotates with the rotation of the spiral sleeve 20, so that the first toothed structure 51 and the second toothed structure 52 alternately mesh with each other and the tooth tips are opposite. A plunger 60 is fixedly connected to the bottom of the second tooth-shaped structure 52, and the columnar outer wall of the plunger 60 is sleeved with a first elastic member 70. An inner cavity sleeve 80 is also fixedly connected to the bottom of the cylindrical shell 11, and the inner cavity sleeve 80 is communicated with the interlayer 10. An extrusion port a is provided at the bottom of the inner cavity sleeve 80. When in use, the end of the pressure rod 30 exposed outside the cylindrical shell 11 is pressed, and the pressure rod 30 is pressed downward to make the spiral sleeve 20 and the cylindrical shell 11 rotate relative to each other in a spiral manner, and the first tooth-shaped structure 51 rotates and is in a bite state with the second tooth-shaped structure 52. The second tooth-shaped structure 52 is driven by the first elastic member 70 to drive the plunger 60 to move in the direction of the first tooth-shaped structure 51 to expose part of the cavity of the inner cavity sleeve 80, and the annular pressure plate 40 and the spiral sleeve 20 rotate relative to each other, and the annular pressure plate 40 moves downward relative to the spiral sleeve 20 to squeeze the space of the interlayer 10. Part of the paste enters the inner cavity sleeve 80 through the interlayer 10 and fills the cavity part. As the first tooth-shaped structure 51 and the second tooth-shaped structure 52 continue to rotate relative to each other until the tooth tips are opposite, the second tooth-shaped structure 52 drives the plunger 60 to press down, and the plunger 60 discharges the paste in the cavity of the inner cavity sleeve 80 from the extrusion port a. At the same time, the plunger 60 blocks the extrusion port a to prevent contamination of the internal paste. In this way, the paste extrusion device 100 of the embodiment of the present invention can extrude a quantitative paste by pressing, and simultaneously block the extrusion port a after the paste is extruded, which is convenient to use, safe and hygienic.

Optionally, as shown in Figure 3, a spiral guide groove 21 is processed on the inner wall of the spiral sleeve 20, and the spiral guide groove 21 starts at the top of the spiral sleeve 20. A protrusion 31 is provided on the side wall of the pressure rod 30, and the protrusion 31 corresponds to the starting end of the spiral guide groove 21. The pressure rod 30 is pressed in the direction indicated by the arrow in the figure, and the spiral sleeve 20 rotates to make the protrusion 31 slide from the starting end of the spiral guide groove 21 to the tail end.

For example, as shown in FIG3 , a spiral guide groove 21 is machined on the inner wall of the spiral sleeve 20, and correspondingly, a protrusion 31 is provided on the side wall of the pressure rod 30. The pressure rod 30 is pressed in the direction indicated by the arrow in the figure, and the protrusion 31 slides in the spiral guide groove 21 along the extension direction of the spiral guide groove 21. In the initial state, the protrusion 31 is located at the starting end of the spiral guide groove 21. Since the spiral guide groove 21 extends in a spiral downward direction on the inner wall of the spiral sleeve 20, when the protrusion 31 slides in the spiral guide groove 21, there should be relative rotation and relative position movement along the length direction of the spiral sleeve 20 between the pressure rod 30 and the spiral sleeve 20. Among them, the pressure rod 30 moves downward relative to the spiral sleeve 20, and the spiral sleeve 20 only rotates parallel to each other in the cylindrical shell 11, so that the first toothed structure 51 also only rotates parallel to each other without moving up and down.

It should be noted that, in order to achieve the purpose of making the spiral sleeve 20 only rotate in parallel in the cylindrical shell 11, an additional structure can be used to limit the up and down movement between the spiral sleeve 20 and the cylindrical shell 11 while the spiral sleeve 20 can rotate relative to the cylindrical shell 11. For example, an annular groove can be provided on the inner wall of the cylindrical shell 11, and a convex portion can be correspondingly provided on the outer wall of the spiral sleeve 20, and the convex portion slides in the annular groove. In addition, the cylindrical shell 11 and the side wall of the spiral sleeve 20 do not contact each other. In this way, when the spiral sleeve 20 is driven to rotate, due to the sliding trajectory of the convex portion and the annular groove, the spiral sleeve 20 and the cylindrical shell 11 cannot move up and down, thereby transferring the up and down movement component during the spiral rotation to the pressure rod 30.

Of course, the above-mentioned limiting structure is only one embodiment, and the paste extrusion device 100 of the embodiment of the present invention is not specifically limited to this, as long as it can ensure that the spiral sleeve 20 and the cylindrical shell 11 can rotate relative to each other without moving up and down.

Optionally, as shown in FIG. 1 , the spiral sleeve 20 is connected to the cylindrical shell 11 via a bearing 13 , the outer ring of the bearing 13 is fixedly connected to the inner wall of the cylindrical shell 11 , and the inner ring of the bearing 13 is fixedly connected to the spiral sleeve 20 .

As shown in FIG1 , the spiral sleeve 20 is connected to the cylindrical shell 11 by a bearing 13. For example, the bearing 13 can be an ordinary ball bearing. The outer ring of the bearing 13 is fixedly connected to the inner wall of the cylindrical shell 11, and the inner ring of the bearing 13 is fixedly connected to the spiral sleeve 20. When the spiral sleeve 20 is driven to rotate, the setting of the bearing 13 can make the spiral sleeve 20 only rotate parallel to the cylindrical shell 11 without additional up and down movement. Moreover, the setting of the bearing 13 can make the relative rotation between the spiral sleeve 20 and the cylindrical shell 11 smooth and the friction is small, thereby effectively improving the convenience of use and service life of the paste extrusion device 100 of the embodiment of the present invention. The bearing 13 has a simple structure and low cost. It is applied to the structure of the embodiment of the present invention, which can improve the working stability of the device during repeated pressing operations during use.

Optionally, as shown in FIG. 1 , a gap layer 14 is formed between the spiral sleeve 20 and the cylindrical shell 11 , and the bearing 13 is connected to the gap layer 14 .

If there is no gap layer 14 between the spiral sleeve 20 and the cylindrical shell 11, the side wall of the spiral sleeve 20 and the side wall of the cylindrical shell 11 will contact each other, and mutual friction will occur when the spiral sleeve 20 and the cylindrical shell 11 rotate relative to each other, which will increase the rotational resistance and reduce the working life of the spiral sleeve 20 and the cylindrical shell 11, and may also cause the spiral sleeve 20 and the cylindrical shell 11 to become stuck in rotation, making the paste extrusion device 100 unusable.

As shown in Figure 1, a gap layer 14 is formed between the spiral sleeve 20 and the cylindrical shell 11, and the bearing 13 is connected and arranged at the position of the gap layer 14. In this way, the spiral sleeve 20 rotates relative to the cylindrical shell 11 under the rotational connection of the bearing 13. The spiral sleeve 20 and the cylindrical shell 11 are only rotatably connected through the bearing 13, and other positions of the spiral sleeve 20 and the side wall of the cylindrical shell 11 will not contact each other due to the existence of the gap layer 14, thereby improving the smoothness of the relative rotation between the spiral sleeve 20 and the cylindrical shell 11.

Optionally, a through groove is processed on the side wall of the cylindrical shell 11 along the pressing direction of the pressure rod 30, as shown in Figure 4, the annular pressure plate 40 includes a nut 41 and a pressure plate 43 connected to the nut 41 through a connecting portion 42, the connecting portion 42 is located in the through groove, and the nut 41 is threadedly connected to the outer wall of the spiral sleeve 20.

As shown in FIG1 , the annular pressing plate 40 is connected by a connecting portion 42 to a nut 41 and a pressing plate 43, and the nut 41 is threadedly connected to the outer wall of the spiral sleeve 20. When the spiral sleeve 20 rotates, the connecting portion 42 is stuck in the through groove, which limits the annular pressing plate 40 as a whole from rotating relative to the cylindrical shell 11, so that when the spiral sleeve 20 rotates, the annular pressing plate 40 can move along the extension direction of the through groove through the threaded connection relationship with the spiral sleeve 20. The annular pressing plate 40 moves downward along the through groove to squeeze the space for accommodating the paste in the interlayer 10. This annular pressing plate 40 and the connection method between the annular pressing plate 40, the cylindrical shell 11 and the spiral sleeve 20 can, on the one hand, ensure that the annular pressing plate 40 squeezes the space of the interlayer 10, and on the other hand, can also effectively prevent the paste in the interlayer 10 from entering the space within the cylindrical shell 11, affecting the stable and smooth operation of the paste extrusion device 100 of the embodiment of the present invention.

Optionally, both the first toothed structure 51 and the second toothed structure 52 are circular toothed disks, as shown in Fig. 5 . A plurality of teeth 511 are evenly distributed in the circumferential direction on the surfaces of the first toothed structure 51 and the second toothed structure 52 on opposite sides thereof, and the first toothed structure 51 and the second toothed structure 52 rotate relative to each other, and the plurality of teeth 511 on the two circular toothed disks engage with each other or the tooth tips abut against each other.

As shown in Figure 5, the first tooth-shaped structure 51 is a structure in which a plurality of teeth 511 are evenly distributed along the circumferential direction on a circular toothed disk. When the first tooth-shaped structure 51 rotates with the spiral sleeve 20, the first tooth-shaped structure 51 rotates along the center of its own circular toothed disk. The second tooth-shaped structure 52 has the same structure as the first tooth-shaped structure 51. When rotating, a plurality of teeth 511 distributed on the same circumference on the circular toothed disk can realize alternating mutual engagement and tooth tip abutment in a cyclic relative rotation.

Optionally, the longitudinal sections of the multiple teeth 511 are all trapezoidal shapes extending outward from the circular toothed disc.

It should be noted that the longitudinal section of the tooth 511 refers to a section along a direction perpendicular to the circular toothed disc, that is, the arrangement direction of the tooth 511 is the longitudinal direction.

The longitudinal section of the tooth 511 is a trapezoid extending outward from the circular toothed disc. When the first tooth-shaped structure 51 rotates with the spiral sleeve 20, the direction of rotation is set to the direction that matches the inclined surface of the trapezoid, and when the first tooth-shaped structure 51 and the second tooth-shaped structure 52 are in a state where the tooth tips abut against each other, the teeth 511 of the first tooth-shaped structure 51 and the teeth 511 of the second tooth-shaped structure 52 abut against each other at the upper bottom position of the trapezoid. In this way, when the first tooth-shaped structure 51 and the second tooth-shaped structure 52 are in a state where the tooth tips abut against each other, the upper bottom planes of the two trapezoids abut against each other, thereby achieving better stability. When the first tooth-shaped structure 51 and the second tooth-shaped structure 52 are transformed between the state where the tooth tips abut against each other and the occlusal state, the transformation is achieved through the trapezoidal inclined surface of the tooth 511, which can provide a better force distribution to make the transformation effortless and smooth.

Of course, because usually, in the paste extrusion device 100 of the embodiment of the present invention, the rotation direction of the first tooth-shaped structure 51 is predetermined, therefore, in the embodiment of the present invention, there is no limitation on whether the tooth 511 is a general trapezoid, an isosceles trapezoid or a right-angled trapezoid. When the tooth 511 is set to a right-angled trapezoid, those skilled in the art should know that when setting the rotation direction of the first tooth-shaped structure 51 relative to the second tooth-shaped structure 52, the first tooth-shaped structure 51 and the second tooth-shaped structure 52 are set to rotate relative to each other toward the inclined side of the right-angled trapezoid.

Optionally, as shown in Figure 3, a second elastic member (not shown in Figure 3) is provided at the bottom end of the pressure rod 30, one end of the second elastic member is abutted against the bottom surface of the pressure rod 30, and the other end is abutted against the top surface of the first toothed structure 51, and the protrusion 31 on the side wall of the pressure rod 30 slides out from the tail end of the spiral guide groove 21, and the second elastic member pushes the pressure rod 30 to return to its initial position.

For example, an auxiliary groove that linearly connects the tail end of the spiral guide groove 21 to the starting end can be set at the tail end of the spiral guide groove 21. When the protrusion 31 on the side wall of the pressure rod 30 slides from the starting end of the spiral guide groove 21 to the tail end, the protrusion 31 enters the auxiliary groove and quickly slides in the auxiliary groove under the push of the second elastic member, and returns from the tail end of the spiral guide groove 21 to the starting end, that is, the pressure rod 30 returns to the initial position. In this way, the closed-loop cyclic motion state between the pressure rod 30 and the spiral sleeve 20 can be guaranteed, and the stability of operation can be improved.

Optionally, an elastic sealing layer is sleeved on the outer wall of the cylindrical shell 11, and a pre-cut line is formed on the elastic sealing layer at a position corresponding to the through groove.

An elastic sealing layer (not shown in FIG. 1 ) is sleeved on the outer wall of the cylindrical shell 11, so that the paste in the interlayer 10 between the cylindrical shell 11 and the outer shell 12 can be prevented from entering the interior of the cylindrical shell 11 through the through groove, so as to ensure the sealing of the interlayer 10, keep the paste in the interlayer 10 clean and hygienic, and prevent the paste from entering the cylindrical shell 11 and affecting the internal transmission of the device.

After the elastic sealing layer is sleeved on the outer wall of the cylindrical shell 11 , the annular pressing plate 40 can slide downward gradually by pushing or destroying the elastic sealing layer when moving downward along the through groove of the cylindrical shell 11 .

Alternatively, a pre-cut line can be formed in advance at the position of the elastic sealing layer corresponding to the through groove. The pre-cut line can be a breakpoint connecting line or a slit. Since the elastic sealing layer itself has a certain elasticity, when the connecting portion 42 of the annular pressure plate 40 pushes the power-off connecting line or the slit, the elastic sealing layer can retreat to a moving position to allow the annular pressure plate 40 to move downward along the through groove. At the position where the connecting portion 42 of the annular pressure plate 40 moves away, the end point connecting line or the two sides of the slit of the elastic sealing layer can be merged to ensure sealing.

Optionally, the side wall of the inner cavity sleeve 80 is connected to the interlayer 10 via a connecting channel, and the connecting channels include a plurality of connecting channels, which are evenly distributed along the circumference of the same cross section of the side wall of the inner cavity sleeve 80 .

Optionally, the first elastic member 70 is a coil spring, as shown in FIG. 1 , the inner cavity sleeve 80 is fixedly connected to the cylindrical shell 11 via a support portion 81 , one end of the coil spring abuts against the bottom of the second toothed structure 52 , and the other end abuts against the support portion 81 .

As shown in Fig. 1, the coil spring can accumulate elastic potential energy in the compressed state and release it through the two abutting ends. In the paste extrusion device 100 of the embodiment of the present invention, the coil spring is in a compressed state in both the initial state and the filling state, one end of the coil spring abuts against the bottom of the second toothed structure 52, and the other end abuts against the support portion 81. When the paste extrusion device 100 is changed from the initial state to the filling state, the coil spring releases the accumulated elastic potential energy to push the second toothed structure 52 toward the direction of the first toothed structure 51 and engage with the first toothed structure 51.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims (9)

1. A paste extrusion device is characterized by comprising a tubular shell with an opening at the top end and a hollow interior, wherein a shell is sleeved outside the tubular shell, an interlayer is formed between the tubular shell and the shell and used for filling paste, a spiral sleeve is arranged in the tubular shell, a pressing rod is arranged in the spiral sleeve in a penetrating manner, an annular pressing plate is connected with the periphery of the spiral sleeve in a threaded manner, the annular pressing plate stretches into the interlayer, the pressing rod can enable the spiral sleeve and the tubular shell to rotate relatively in a spiral manner and extrude the space of the interlayer through the opening end of the tubular shell, a first tooth-shaped structure is fixedly arranged at the bottom of the spiral sleeve, a second tooth-shaped structure which can be meshed with the first tooth-shaped structure is also arranged in the tubular shell, a plunger is fixedly connected to the bottom of the second tooth-shaped structure, the cylindrical outer wall of the plunger is sleeved with a first elastic piece, the bottom of the cylindrical shell is fixedly connected with an inner cavity sleeve, the inner cavity sleeve is communicated with the interlayer, an extrusion opening is formed in the bottom of the inner cavity sleeve, paste entering the inner cavity sleeve through the interlayer can be discharged from the extrusion opening under the pushing of the plunger, the first tooth-shaped structure and the second tooth-shaped structure are circular fluted discs, a plurality of teeth are uniformly distributed on the surfaces of opposite sides of the first tooth-shaped structure and the second tooth-shaped structure in the circumferential direction, the first tooth-shaped structure and the second tooth-shaped structure rotate relatively, a plurality of teeth on the two circular fluted discs are meshed with each other or are abutted against each other, and the plunger completely fills an inner cavity of the inner cavity sleeve and seals the extrusion opening.

2. The paste extrusion device according to claim 1, wherein a spiral guide groove is formed in the inner wall of the spiral sleeve, the spiral guide groove takes the top end of the spiral sleeve as the starting end, a protrusion is arranged on the side wall of the pressing rod, the protrusion corresponds to the starting end of the spiral guide groove, the pressing rod is pressed, and the spiral sleeve rotates to enable the protrusion to slide from the starting end to the tail end of the spiral guide groove.

3. The paste extrusion device according to claim 2, wherein the spiral sleeve is connected with the cylindrical shell through a bearing, an outer ring of the bearing is fixedly connected with an inner wall of the cylindrical shell, and an inner ring of the bearing is fixedly connected with the spiral sleeve.

4. A paste extrusion apparatus according to claim 3, wherein a void layer is formed between the spiral sleeve and the cylindrical housing, and the bearing connection is provided in the void layer.

5. A paste extrusion device according to claim 3, wherein the cylindrical housing side wall is formed with a through groove along the pressing direction of the pressing rod, the annular pressing plate comprises a nut and a pressing plate connected with the nut through a connecting portion, the connecting portion is located in the through groove, and the nut is in threaded connection with the outer wall of the spiral sleeve.

6. The paste extrusion device of claim 1, wherein the longitudinal cross-sections of the plurality of teeth are each trapezoidal extending outwardly from the circular fluted disc.

7. The paste extrusion device according to claim 2, wherein a second elastic member is arranged at the bottom end of the pressing rod, one end of the second elastic member abuts against the bottom surface of the pressing rod, the other end of the second elastic member abuts against the top surface of the first tooth-shaped structure, the protruding portion of the side wall of the pressing rod slides out from the tail end of the spiral guide groove, and the second elastic member pushes the pressing rod to return to the initial position.

8. The paste extrusion device according to claim 5, wherein an elastic sealing layer is provided around the outer wall of the cylindrical case, and a precut line is formed at a position corresponding to the through groove.

9. The paste extrusion device according to claim 1, wherein the side wall of the inner cavity sleeve is communicated with the interlayer through a plurality of communication channels, and the plurality of communication channels are uniformly distributed along the circumference of the same section of the side wall of the inner cavity sleeve.