Recyclable external annular belt-type nozzle assembly

Abstract

A recyclable external annular belt-type nozzle assembly includes a nozzle tube 2 and a nozzle cover (fig 7, 1). The nozzle cover includes a cover body 101, a binding ring 103 and a bendable outer rin

Description

FIELD OF THE INVENTION

[0001] The present application relates to the technical field of packaging, and in particular to a recyclable external annular belt-type nozzle assembly. BACKGROUD OF THE INVENTION

[0002] The nozzle is mainly used in soft packaging bags with openings. The soft packaging bag with the nozzle together is called a nozzle bag, which is mainly used for filling liquid foods such as beverages and jellies. Compared with hard packaging, it features easy to suck and carry.

[0003] To prevent the nozzle from being contaminated and food spilling, the nozzle is equipped with a nozzle cover to seal the nozzle. However, most of the prior art nozzle covers are completely separated from the nozzle bags after opening, and one of the main application fields of the nozzle bags is the industry of children's food. The taken-off nozzle covers after opening are easy to be swallowed by children by mistake, causing suffocation, which poses a great safety hazard.

[0004] Moreover, Europe and the United States are the applicant's main sales markets. Based on environmental protection and recycling considerations, the EU Single-Use Plastics Directive 2019 / 204 requires that from July 2024, the bottle caps of plastic beverage bottles must be connected to the bottle bodies throughout their entire use. The nozzle cover separated from the soft nozzle bag is easily discarded, which makes it difficult to recycle the nozzle cover and the nozzle bag together, failing to meet the requirements of the European Union.

[0005] In order to solve the above problems, the applicant developed and designed a nozzle cover to meet environmental protection requirements, and filed a patent application with publication number CN220866077U. The patent discloses a nozzle cover, including an inner cover and a safety ring with an axial air passage being defined between the inner cover and the safety ring. The safety ring is provided with at least one notch penetrating through a side there of to define a radial air passage, the notch extending to a lower end of the nozzle, and at least one deformable strap is provided in the notch.

[0006] In the above-mentioned applicant's earlier patent, the notch is defined on a side wall of the nozzle cover to accommodate the strap, so that the nozzle cover cannot be completely separated from the soft packaging bag through the strap, thereby avoiding the nozzle cover from being discarded alone as much as possible, and good for recycling. In addition, even if a child puts the nozzle cover into a mouth, the child cannot swallow the nozzle cover, thereby basically avoiding the potential safety hazard of choking caused by swallowing.

[0007] However, the strap shape design disclosed in the earlier patent application is difficult to apply to a single-layer nozzle cover due to simple construction and small wall thickness of the single-layer nozzle cover. Moreover, the manufacture difficulty is also relatively large. Therefore, the inventor aims to provide a more versatile and recyclable nozzle cover structure. SUMMARY OF THE INVENTION

[0008] Considering the problems in the related art, the present application proposes a recyclable external annular belt-type nozzle assembly to overcome the above-mentioned technical problems existing in the existing related art.

[0009] The technical solution of this application is described as follows:

[0010] A recyclable external annular belt-type nozzle assembly includes a nozzle tube and a nozzle cover, wherein the nozzle cover includes a cover body, a binding ring and a bendable outer ring belt;

[0011] the cover body is screwed and installed on the nozzle tube; the binding ring is arranged below the cover body and is kept rotatably connected to the nozzle tube; the binding ring and the cover body are kept connected through the outer ring belt;

[0012] the outer ring belt surrounds an outer peripheral wall of the cover body, and a first end of the outer ring belt is located at the outer peripheral wall of the cover body, a second end of the outer ring belt is connected to the binding ring, and a direction in which the first end extends toward the second end is the same as that in which the cover body rotates to open the cover;

[0013] the outer ring belt is located outside the outer peripheral wall of the cover body, and a first breakpoint connection structure is provided between an inner side wall of the outer ring belt and the outer peripheral wall of the cover body in a horizontal direction to realize interconnection there between; and a second breakpoint connection structure is provided between a bottom surface of the cover body and the binding ring along a vertical direction to realize interconnection there between.

[0014] At first, when the cover body is rotated to be open, the first and second breakpoint connection structures are configured to be broken by force, the cover body is unscrewed and separated from the nozzle tube, and the binding ring remains rotatably connected to the nozzle tube; the cover body is connected to the binding ring through the external ring belt, and further connected to the nozzle tube, so that children are prevented from swallowing the cover body, and the nozzle cover is prevented from being discarded alone, so that the cover body is easy to recycle.

[0015] Secondly, compared with the prior art, the connection design of this application only needs to add the outer ring belt on an outside of the original cover product, which is more versatile and can be applied to a variety of cover shapes. Additionally, the addition of the outer ring belt does not change an internal structure of the cover body, and the original automatic assembly line and nozzle tube mold can continue to be used, which can effectively control the cost of producing new products .

[0016] Moreover, the long outer ring belt design ensures that the cover body is at a certain distance from the nozzle tube after opening, so as to prevent the cover body from being too close to the nozzle tube during sucking, thereby preventing the lip skin from being scratched or the cover body from being contaminated with contents of a soft packaging bag.

[0017] Finally, this application is mainly used in soft packaging bags for children's food. A single-layer nozzle cover in this industry is generally small in size and not easy to grasp and pinch. At the same time, considering that children have limited strength, it is necessary to continuously pursue "reducing difficulty of opening the cover" in terms of structural design. The first and second breakpoint connection structures of the present application are directly connected to the cover body from different directions, one is to fix a position and shape of the outer ring belt, and the other is to achieve that when the cover body is unscrewed by applying force, the two breakpoint connection structures are broken at the same time., the first breakpoint connection structure and the second breakpoint connection structure can be disconnected more directly and quickly, making it easier to open the cover. In addition, the purchaser can intuitively determine whether a product has been opened by checking whether the breakpoint connection structure is broken, which has an anti-theft effect.

[0018] Preferably, the first breakpoint connection structure includes a plurality of first broken bridges which are evenly distributed along a length direction of the outer ring belt;

[0019] before opening the cover body, the plurality of the first broken bridges are formed by an inner wall of the outer ring belt protruding toward a central axis direction of the cover body, and a width of the first broken bridge gradually decreases toward the central axis direction to form a narrow end of the first broken bridge; the narrow end of the first broken bridge is connected to the outer peripheral wall of the cover body.

[0020] The design of the above-mentioned first broken bridge is to make the first broken bridge break from the narrow end, so that all the first broken bridges are away from the nozzle tube along with the outer ring belt after the cover is opened, so as to avoid the first broken bridge protruding outward on a surface of the nozzle tube from scratching lips of an eater.

[0021] Preferably, the second breakpoint connection structure includes a plurality of second broken bridges .

[0022] before opening the cover body, the plurality of second broken bridges are formed by protruding downward from the bottom surface of the cover body, and a width of the second broken bridges gradually decreases toward the binding ring, thereby forming a narrow end of the second broken bridge; the narrow end of the second broken bridge is connected to atop of the binding ring.

[0023] The design of the above-mentioned second broken bridge is to make the second broken bridge break from the narrow end, so that all the second broken bridges are away from the nozzle tube as the cover body is opened, avoiding the broken and extruded second broken bridge on the surface of the nozzle tube from scratching the lips of the eater.

[0024] Preferably, the bottom surface of the cover body protrudes downward to form at least two lifting step blocks, and a bottom of the lifting step block is lower than a bottom of the second broken bridge;

[0025] the top of the binding ring is provided with a plurality of vacancy-avoiding gaps that cooperate with the lifting step blocks; the vacancy-avoiding gap is defined by the top of the binding ring being depressed downward or penetrating there through;

[0026] before opening the cover body, the cover body and the binding ring are connected via the second breakpoint connection structure, and the lifting step block is located in the vacancy-avoiding gap;

[0027] when the cover body is rotated to open, a first side wall of the lifting step block rotates radially and collides with a second side wall of the vacancy-avoiding gap, and is then lifted up and separated from the vacancy-avoiding gap. The "lifting" action of the lifting step block gives the first breakpoint connecting structure and the second breakpoint connecting structure a "sudden" upward force, thereby assisting the first and second breakpoint connecting structures to break, making it easier to open the cover.

[0028] Preferably, the lifting step blocks and the second broken bridges are located in the same radial direction and distributed along the circumference, and each of the lifting step blocks is provided with the second broken bridges on both sides in the radial direction such that the "sudden" upward force generated by the "lifting" action of the lifting step block is evenly distributed at various positions of the cover body .

[0029] When the cover body is rotated to open, the first side wall is inclined downward from the bottom surface of the cover body and in a direction of tightening the cover body, and the second side wall is inclined upward from a bottom surface of the vacancy-avoiding gap and in a direction of unscrewing the cover body; the first side wall and the second side wall are both inclined surfaces and can slide relative to each other so that the lifting step block can be separated from the vacancy-avoiding gap effortlessly and smoothly.

[0030] A side wall of the lifting step block 101b opposite to the first side wall is defined as a third side wall, and a side wall in the vacancy-avoiding gap opposite to the second side wall is defined as a fourth side wall; both the third side wall and the fourth side wall are vertical surfaces. Their functions are as follows: first, to prevent the eater from turning the cover in that direction to open it, and to remind the eater of the correct direction to open the cover; second when the cover is turned again to close, the vertical surface design can provide a sudden click-in-place feel reminding the eater that the cover has been tightened.

[0031] Preferably, the binding ring has an annular top an outer diameter of the annular top is greater than a width of the outer peripheral wall of the cover body, while an inner diameter of the annular top is smaller than the width of the outer peripheral wall of the cover body.

[0032] A position of the annular top close to the central axis is set as an inner ring portion, and a position away from the central axis is set as an outer ring portion.

[0033] The outer ring belt is located above the outer ring portion, the second end of the outer ring belt is connected to a top surface of the outer ring portion, and an outer side of the second end is flush with an outer side of the outer ring portion; an outer side of the outer ring belt before the cover is opened does not exceed the outer side of the outer ring portion to avoid the outer ring belt from being too extruded to reduce collision or hooking.

[0034] The second breakpoint connection structure and the lifting step block are located at a top surface of the inner ring portion, and inner sides of the second breakpoint connection structure and the lifting step block are flush with an inner side of the inner ring portion; the inner ring portion extends or is recessed downwardly to form the plurality of vacancy-avoiding gaps. The entire structure is compact and reasonable.

[0035] Preferably, a bottom of the outer ring portion protrudes downward and extends to define a cylindrical structure, and the cylindrical structure works as a main body of the binding ring.

[0036] A bottom of the inner ring portion is hollow, a limiting protrusion is provided below the inner ring portion, and an outwardly protruding annular groove is provided on an outer side wall of the nozzle tube in its radial direction, with the annular groove facing outside; the limiting protrusion is pressed into and assembled with the annular groove, thereby making the limiting protrusion rotate to engage in the annular groove, and the width of the annular groove is greater than the maximum height of the limiting protrusion in a vertical direction. The limiting protrusion has a certain vertical movable space in the annular groove.

[0037] More preferably, the annular groove is defined by an upper annular rib and a lower annular rib distributed radially along the nozzle tube, and an outer width of the lower annular rib is greater than that of the upper annular rib.

[0038] An outer width of the upper annular rib is greater than an inner diameter of the inner ring portion, and the upper annular rib prevents the inner ring portion from entering the annular groove; the outer width of the lower annular rib is greater than that of the bottom of the binding ring. This helps to remind that the limiting protrusion is assembled in place.

[0039] Preferably, pressing the binding ring causes elastic deformation of the same, thereby causing the limiting protrusion to be engaged in the annular groove .

[0040] Essentially, as long as the limiting protrusion is inwardly convex and has a suitable size, it can achieve the effect of rotating and engaging with the annular groove. Preferably, the limiting protrusion is constructed of a plurality of protrusions, and the protrusions are distributed along a circumference of an inner wall of the cylindrical structure. The discontinuous limiting protrusions arranged at intervals help the binding ring to perform elastic deformation easily.

[0041] Planes are defined by cutting at two opposite positions on an outer circumference of the annular groove. This reduces the width of the annular groove, making it easier for the limiting protrusion to snap into the annular groove, while the opposite sides that has not been cut maintain their original width, making it difficult for the annular groove to slip out after being snapped in.

[0042] Preferably, a bottom surface of the protrusion is an inclined surface, and the bottom surface of the protrusion extends and inclines upward and toward the central axis direction from the inner side wall of the cylindrical structure. This facilitates guiding the limiting protrusion to smoothly snap into the annular groove . BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a first schematic diagram of the structure of Embodiment 1;

[0044] Figure 2 is a second schematic diagram of the structure of Embodiment 1;

[0045] Figure 3 is a third schematic diagram of the structure of Embodiment 1 (with the cover being opened) ;

[0046] Figure 4 is a top view of Embodiment 1;

[0047] Figure 5 is a cross-sectional view taken along a line A-A of Figure 4;

[0048] Figure 6 is an enlarged view of point A in Figure 5;

[0049] Figure 7 a schematic structural diagram of a nozzle cover of Embodiment 1;

[0050] Figure 8 is a first schematic diagram of the structure of Embodiment 2;

[0051] Figure 9 is a second schematic diagram of the structure of Embodiment 2; and

[0052] Figure 10 a schematic structural diagram of a nozzle tube of the present application.

[0053] Reference numerals:

[0054] 1. Nozzle cover;

[0055] 101. Cover body; 101a. Second broken bridge; 101b. Lifting step block; 101c. Raised strip;

[0056] 102.outer ring belt; 102a.First end; 102b, Second end; 102c.First broken bridge;

[0057] 103.Binding ring; 103a.Vacancy-avoiding gap; 103b.Outer ring portion; 103c.Inner ring portion; 103d. Cylindrical structure; 103e. Protrusion;

[0058] 2 . Nozzle tube; 201. Upper annular rib; 202. Lower annular rib; 203. Plane. DETAILED DESCRIPTION OF THE INVENTION

[0059] The drawings in the embodiments of the present application will be used to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0060] In the following text of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the mentioned device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present application.

[0061] Embodiment 1

[0062] As shown in Figures 1-7, a recyclable external annular belt-type nozzle assembly includes a nozzle tube 2 and a nozzle cover 1.

[0063] The nozzle cover 1 includes a cover body 101, a binding ring 103 and a bendable outer ring belt 102. The cover body 101 is screwed and installed on the nozzle tube 2 . The binding ring 103 is arranged below the cover body 101 and is kept rotatably connected to the nozzle tube 2. The binding ring 103 and the cover body 101 are kept connected through the outer ring belt 102.

[0064] The outer ring belt 102 surrounds an outer peripheral wall of the cover body 101 for nearly one circle, and a first end 102a of the outer ring belt 102 is located at the outer peripheral wall of the cover body 101. In this embodiment, the first end 102a is located near a bottom of the outer peripheral wall of the cover body 101, and the bottom of the first end 102a is flush with the bottom of the outer peripheral wall of the cover body 101. A second end 102b of the outer ring belt 102 is connected to the binding ring 103, and a direction in which the first end 102a extends toward the second end 102b is the same as that in which the cover body 101 rotates to open the cover, so that the rotation and opening of the cover can be done.

[0065] The outer ring belt 102 is located outside the outer peripheral wall of the cover body 101, and a first breakpoint connection structure is provided between an inner side wall of the outer ring belt 102 and the outer peripheral wall of the cover body 101 in a horizontal direction to realize interconnection there between; and a second breakpoint connection structure is provided between a bottom surface of the cover body 101 and the binding ring 103 along a vertical direction to realize interconnection there between.

[0066] When the cover body 101 is rotated to be open, the first and second breakpoint connection structures are broken by force, the cover body 101 is unscrewed and separated from the nozzle tube 2, and the binding binding ring 103 remains rotatably connected to the nozzle tube 2. The cover body 101 is connected to the binding ring 103 through the external ring belt 102, and further connected to the nozzle tube 2, so that children are prevented from swallowing the cover body 101, and the nozzle cover 1 is prevented from being discarded alone, so that the cover body 101 is easy to recycle.

[0067] In this embodiment, the first breakpoint connection structure includes a plurality of first broken bridges 102cwhich are evenly distributed along a length direction of the outer ring belt 102.

[0068] Before opening the cover body, the plurality of the first broken bridges 102c are formed by an inner wall of the outer ring belt 102 protruding toward a central axis direction of the cover body 101, and awidth of the first broken bridge 102c gradually decreases toward the central axis direction to form a narrow end of the first broken bridge 102c. The narrow end of the first broken bridge 102c is connected to the outer peripheral wall of the cover body 101, and the first broken bridge 102c has a structure similar to a triangle or a trapezoid.

[0069] In this embodiment, the second breakpoint connection structure includes a plurality of second broken bridges 101a, and the second broken bridges 101a also have a similar triangular or trapezoidal structure .

[0070] Before opening the cover body, the plurality of second broken bridges 101a are formed by protruding downward from the bottom surface of the cover body 101, and a width of the second broken bridge 101a gradually decreases toward the binding ring 103, thereby forming a narrow end of the second broken bridge 101a . The narrow end of the second broken bridge 101 a is connected to atop of the binding ring 103.

[0071] Specifically, an outer side surface of the cover body 101 is provided with a raised strip 101c in a vertical direction to increase friction and have an anti-slip effect; and a matching screw thread is provided between an inner side surface of the cover body 101 and the nozzle tube 2.

[0072] The bottom surface of the cover body 101 protrudes downward to form at least two (specifically two in this embodiment) lifting step blocks 101b, and a bottom of the lifting step block 101b is lower than a bottom of the second broken bridge 101a.

[0073] The top of the binding ring 103 is provided with a plurality of (two) vacancy-avoiding gaps 103a that cooperate with the lifting step blocks 101b. The vacancy-avoiding gap 103a is defined by the top of the binding ring 103 being depressed downward or penetrating there through.

[0074] Before opening the cover body, the cover body 101 and the binding ring 103 are connected via the second breakpoint connection structure, and the lifting step block 101b is located in the vacancy-avoiding gap 103a.

[0075] When the cover body 101 is rotated to open, a first side wall of the lifting step block 101b rotates radially and collides with a second side wall of the vacancy-avoiding gap 103a, and is then lifted up and separated from the vacancy-avoiding gap 103a, thereby assisting the breaking of the first breakpoint connection structure and the second breakpoint connection structure.

[0076] In this embodiment, the lifting step blocks 101b and the second broken bridges 101a are located in the same radial direction and distributed along circumference, and each of the lifting step blocks 101b is provided with the second broken bridges 101a on both sides in the radial direction.

[0077] When the cover body 101 is rotated to open, the first side wall is inclined downward from the bottom surface of the cover body 101 and in a direction of tightening the cover body 101, and the second side wall is inclined upward from a bottom surface of the vacancy-avoiding gap 103a and in a direction of unscrewing the cover body 101. The first side wall and the second side wall are both inclined surfaces and can slide relative to each other.

[0078] A side wall of the lifting step block 101b opposite to the first side wall is defined as a third side wall, and a side wall in the vacancy-avoiding gap 103a opposite to the second side wall is defined as a fourth side wall. Both the third side wall and the fourth side wall are vertical surfaces.

[0079] In present embodiment, the binding ring 103 has an annular top, an outer diameter of the annular top is greater than a width of the outer peripheral wall of the cover body 101, while an inner diameter of the annular top is smaller than the width of the outer peripheral wall of the cover body 101.

[0080] A position of the annular top close to the central axis is set as an inner ring portion 103c, and a position away from the central axis is set as an outer ring portion 103b.

[0081] The outer ring belt 102 is located above the outer ring portion 103b, the second end 102b of the outer ring belt 102 is connected to atop surface of the outer ring portion 103b, and an outer side of the second end 102b is flush with an outer side of the outer ring portion 103b. An outer side of the outer ring belt 102 before the cover is opened does not exceed the outer side of the outer ring portion 103b.

[0082] The second breakpoint connection structure and the lifting step block 101b are located at a top surface of the inner ring portion 103c, and inner sides of the second breakpoint connection structure and the lifting step block 101b are flush with an inner side of the inner ring portion 103c. The inner ring portion 103c penetrates downward to form the plurality of vacancy-avoiding gaps 103a.

[0083] In this embodiment, a bottom of the outer ring portion 103b protrudes downward and extends to define a cylindrical structure 103d, and the cylindrical structure 103d works as a main body of the binding ring 103.

[0084] A bottom of the inner ring portion 103c is hollow, a limiting protrusion is provided below the inner ring portion 103c, and an outwardly protruding annular groove is provided on an outer side wall of the nozzle tube 2 in its radial direction, with the annular groove facing outside . The limiting protrusion is press ed and then rotated to engage in the annular groove, and awidth of the annular groove is greater than the maximum height of the limiting protrusion in a vertical direction .

[0085] Referring to figure 10, in this embodiment, the annular groove is defined by an upper annular rib 201 and a lower annular rib 202 distributed radially along the nozzle tube 2, and an outer width of the lower annular rib 202 is greater than that of the upper annular rib 201.

[0086] The outer width of the upper annular rib 201 is greater than an inner diameter of the inner ring portion 103c, and the upper annular rib 201 prevents the inner ring portion 103c from entering the annular groove. The outer width of the lower annular rib 202 is greater than that of the bottom of the binding ring 103.

[0087] In this embodiment, pressing the binding ring 103 causes elastic deformation of the same, thereby causing the limiting protrusion to be engaged in the annular groove. The limiting protrusion is constructed of a plurality of protrusions 103e, and the protrusions 103e are distributed along a circumference of an inner wall of the cylindrical structure 103d.

[0088] A bottom surface of the protrusion 103e is an inclined surface, and the bottom surface of the protrusion 103e extends and inclines upward and toward the central axis direction from the inner side wall of the cylindrical structure 103d.

[0089] Planes 203 are formed by cutting at two opposite positions on an outer circumference of the annular groove.

[0090] Embodiment 2

[0091] As shown in Figures 8-10, the present embodiment is different from the Embodiment 1 in that an outer ring belt 102 is arranged around an outer peripheral wall of a cover body 101 and is close to half a circle, and the rest of the structure is the same as Embodiment 1 and will not be described in detail.

[0092] According to the disclosure and teachings of the above specification, person in the art to which the present application pertains to can also change and modify the above implementation methods. Therefore, the present application is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the present application should also fall within the scope of protection of the claims of the present application. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to this application.

Claims

1. A recyclable external annular belt-type nozzle assembly, comprising a nozzle tube and a nozzle cover, wherein the nozzle cover includes a cover body, a binding ring and a bendable outer ring belt;the cover body is screwed and installed on the nozzle tube; the binding ring is arranged below the cover body and is kept rotatably connected to the nozzle tube; the binding ring and the cover body are kept connected through the outer ring belt;the outer ring belt surrounds an outer peripheral wall of the cover body, and a first end of the outer ring belt is located at the outer peripheral wall of the cover body, a second end of the outer ring belt is connected to the binding ring, and a direction in which the first end extends toward the second end is the same as that in which the cover body rotates to open the cover;the outer ring belt is located outside the outer peripheral wall of the cover body, and a first breakpoint connection structure is provided between an inner side wall of the outer ring belt and the outer peripheral wall of the cover body in a horizontal direction to realize interconnection there between;and a second breakpoint connection structure is provided between a bottom surface of the cover body and the binding ring along a vertical direction to realize interconnection there between;when the cover body is rotated to be open, the first and second breakpoint connection structures are configured to be broken by force, the cover body is unscrewed and separated from the nozzle tube, and the binding ring remains rotatably connected to the nozzle tube; the cover body is connected to the binding ring through the external ring belt, and further connected to the nozzle tube.

2. The recyclable external annular belt-type nozzle assembly as recited in claim 1, wherein the first breakpoint connection structure includes a plurality of first broken bridges;before opening the cover body, the plurality of the first broken bridges are formed by an inner wall of the outer ring belt protruding toward a central axis direction of the cover body, and a width of the first broken bridge gradually decreases toward the central axis direction to form a narrow end of the first broken bridge; the narrow end of the first broken bridge is connected to the outer peripheral wall of the cover body.

3. The recyclable external annular belt-type nozzle assembly as recited in claims 1 or 2, wherein the second breakpoint connection structure includes a plurality of second broken bridges;before opening the cover body, the plurality of second broken bridges are formed by protruding downward from the bottom surface of the cover body, and a width of the second broken bridges gradually decreases toward the binding ring, thereby forming a narrow end of the second broken bridge; the narrow end of the second broken bridge is connected to the top of the binding ring.

4. The recyclable external annular belt-type nozzle assembly as recited in claim 3, wherein the bottom surface of the cover body protrudes downward to form at least two lifting step blocks, and a bottom of the lifting step block is lower than a bottom of the second broken bridge;the top of the binding ring is provided with a plurality of vacancy-avoiding gaps that cooperate with the lifting step blocks; the vacancy-avoiding gap is defined by the top of the binding ring being depressed downward or penetrating there through;before opening the cover body, the cover body and the binding ring are connected via the secondbreakpoint connection structure, and the lifting step block is located in the vacancy-avoiding gap;when the cover body is rotated to open, a first side wall of the lifting step block rotates radially and collides with a second side wall of the vacancy-avoiding gap, and is then lifted up and separated from the vacancy-avoiding gap, thereby assisting the breaking of the first breakpoint connection structure and the second breakpoint connection structure.

5. The recyclable external annular belt-type nozzle assembly as recited in claim 4, wherein the lifting step blocks and the second broken bridges are located in the same radial direction and distributed along circumference, and each of the lifting step blocks is provided with the second broken bridges on both sides in the radial direction;when the cover body is rotated to open, the first side wall is inclined downward from the bottom surface of the cover body and in a direction of tightening the cover body, and the second side wall is inclined upward from a bottom surface of the vacancy-avoiding gap and in a direction of unscrewing the cover body; the first side wall and the second side wall are both inclined surfaces and can slide relative to each other;a side wall of the lifting step block opposite to the first side wall is defined as a third side wall, and a side wall in the vacancy-avoiding gap opposite to the second side wall is defined as a fourth side wall; both the third side wall and the fourth side wall are vertical surfaces.

6. The recyclable external annular belt-type nozzle assembly as recited in claim 4, wherein the binding ring has an annular top, an outer diameter of the annular top is greater than a width of the outer peripheral wall of the cover body, while an inner diameter of the annular top is smaller than the width of the outer peripheral wall of the cover body;a position of the annular top close to the central axis is set as an inner ring portion, and a position away from the central axis is set as an outer ring portion;the outer ring belt is located above the outer ring portion, the second end of the outer ring belt is connected to atop surface of the outer ring portion, and an outer side of the second end is flush with an outer side of the outer ring portion; an outer side of the outer ring belt before the cover is opened does not exceed the outer side of the outer ring portion;the second breakpoint connection structure and thelifting step block are located at a top surface of the inner ring portion, and inner sides of the second breakpoint connection structure and the lifting step block are flush with an inner side of the inner ring portion; the inner ring portion extends or is recessed downward to form the plurality of vacancy-avoiding gaps .

7. The recyclable external annular belt-type nozzle assembly as recited in claim 6, wherein a bottom of the outer ring portion protrudes downward and extends to define a cylindrical structure, and the cylindrical structure works as a main body of the binding ring;a bottom of the inner ring portion is hollow, a limiting protrusion is provided below the inner ring portion, and an outwardly protruding annular groove is provided on an outer side wall of the nozzle tube in its radial direction, with the annular groove facing outside; the limiting protrusion is pressed and then rotated to engage in the annular groove, and the width of the annular groove is greater than the maximum height of the limiting protrusion in a vertical direction .

8. The recyclable external annular belt-type nozzle assembly as recited in claim 7, wherein theannular groove is defined by an upper annular rib and a lower annular rib distributed radially along the nozzle tube, and an outer width of the lower annular rib is greater than that of the upper annular rib;an outer width of the upper annular rib is greater than an inner diameter of the inner ring portion, and the upper annular rib prevents the inner ring portion from entering the annular groove; the outer width of the lower annular rib is greater than that of the bottom of the binding ring.

9. The recyclable external annular belt-type nozzle assembly as recited in claim 8, wherein planes are defined by cutting at two opposite positions on an outer circumference of the annular groove; the limiting protrusion is constructed of a plurality of protrusions, and the protrusions are distributed along a circumference of the inner wall of the cylindrical structure; pressing the binding ring causes elastic deformation of the same, thereby causing the limiting protrusion to be engaged in the annular groove.

10. The recyclable external annular belt-type nozzle assembly as recited in claim 9, wherein a bottom surface of the protrusion is an inclined surface, and the bottom surface of the protrusion extends and inclines upward and toward the central axis directionfrom the inner side wall of the cylindrical structure.

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