Standing pouch suction nozzle capable of preventing excessive screwing

Abstract

The utility model discloses a self-standing pouch suction nozzle capable of preventing excessive screwing, which comprises a screw cap, a suction nozzle, two first stop blocks, two second stop blocks, two arc-shaped positioning blocks and two arc-shaped guide blocks, and the screw cap is in threaded connection with the suction nozzle; a limiting plane is arranged on the outer side wall of the suction nozzle, and the first stopping blocks and the second stopping blocks are sequentially and alternately arranged on the limiting plane in the screwing direction of the internal threads on the inner side wall of the screw cap. The arc-shaped positioning blocks and the arc-shaped guide blocks are sequentially and alternately arranged on the lower end face of a lower end opening of the screw cap in the screwing direction of internal threads on the inner side wall of the screw cap, the upper side face of the second stopping block gradually inclines downwards in the screwing direction of the internal threads of the screw cap, and the lower side face of each arc-shaped guide block gradually inclines downwards in the screwing direction of the internal threads of the screw cap. A first clamping groove is formed in the front side face of the first stopping block, a second clamping groove matched with the one-way teeth is formed in the rear side face of the first stopping block, and the second clamping groove is located on the outer side of the first clamping groove.

Description

Technical Field

[0001] The utility model relates to a self-standing bag nozzle, in particular to a self-standing bag nozzle for preventing over-twisting. Background Art

[0002] At present, a self-standing bag nozzle such as the utility model patent with the authorization publication number of CN214876834U discloses a self-standing bag nozzle with better sealing performance (as Figures 6-7 shown), which includes a screw cap 1' and a nozzle 2'. An internal thread is provided on the inner side wall of the screw cap, and an external thread is provided on the outer side wall of the nozzle. The screw cap and the nozzle are threadedly connected; a connecting ring 11' is provided at the opening edge of the lower end of the screw cap, and at least one one-way tooth 12' is provided on the inner side wall of the connecting ring 11'. The orientation of the one-way tooth 12' is the same as the helix direction of the internal thread on the inner side wall of the screw cap 1'; a limiting ring 21' is provided on the outer side wall of the nozzle 2'. The limiting ring 21' is located below the external thread on the nozzle 2', and at least one blocking block 22' that cooperates with the one-way tooth is provided on the outer circumferential edge of the limiting ring 21'; two positioning bumps 23' are provided on the limiting ring 21', and a plurality of arc-shaped grooves 16' are provided on the lower end surface of the opening at the lower end of the screw cap 1'. The depth of each arc-shaped groove 16' gradually increases along the helix direction of the internal thread of the screw cap 1'. A clamping block 17' is formed at the connection of two adjacent arc-shaped grooves 16'; after the screw cap 1 is tightened on the nozzle 2, the clamping block 17' is snap-fitted with the positioning bump 23'. The thickness of the limiting ring on the outer side wall of this nozzle is relatively thin, and two opposite notches 24' are provided on the outer edge of the limiting ring 21'.

[0003] However, the plurality of arc-shaped grooves 16' at the lower end of the screw cap 1' are embedded in the lower end surface of the screw cap 1' by hollowing out, and the depth of the arc-shaped grooves 16' is limited, resulting in limited resistance; moreover, the height of the two positioning bumps 23' on the limiting ring 21' is also relatively low. When the arc-shaped groove 16' cooperates with the positioning bump 23', the positioning bump 23' easily crosses the arc-shaped groove 16', causing the screw cap to be over-twisted, and easily leading to problems such as deformation, broken ring, and blown cap of the screw cap. Summary of the Utility Model

[0004] The problem to be solved by the utility model is to provide a self-standing bag nozzle for preventing over-twisting, which can prevent over-twisting and avoid problems such as deformation, broken ring, and blown cap of the screw cap.

[0005] In order to solve the above technical problems, the technical scheme adopted by the utility model is as follows:

[0006] A self-standing bag nozzle that prevents over-tightening, comprising a screw cap and a nozzle. The inner side wall of the screw cap is provided with an internal thread, and the outer side wall of the nozzle is provided with an external thread. The screw cap and the nozzle are threadedly connected. A connecting ring is provided at the lower opening edge of the screw cap, and two one-way teeth are provided on the inner side wall of the connecting ring. The orientation of the one-way teeth is the same as the helix direction of the internal thread on the inner side wall of the screw cap. A limiting plane is provided on the outer side wall of the nozzle, and the limiting plane is below the external thread on the nozzle. It is characterized in that: it further comprises two first blocking blocks, two second blocking blocks, two arc-shaped positioning blocks and two arc-shaped guiding blocks. Each first blocking block and second blocking block are alternately arranged on the limiting plane in sequence along the helix direction of the internal thread on the inner side wall of the screw cap. Each arc-shaped positioning block and arc-shaped guiding block are alternately arranged on the lower end surface of the lower opening of the screw cap in sequence along the helix direction of the internal thread on the inner side wall of the screw cap. The upper side surface of the second blocking block gradually slopes downward along the helix direction of the internal thread of the screw cap, and the lower side surface of the arc-shaped guiding block gradually slopes downward along the helix direction of the internal thread of the screw cap. The front side surface of the first blocking block is provided with a first card slot, and the rear side surface of the first blocking block is provided with a second card slot that cooperates with the one-way tooth. The second card slot is outside the first card slot. After the screw cap is tightened on the nozzle, the front end parts of each arc-shaped positioning block are respectively located in the corresponding first card slots, and the lower side surfaces of each arc-shaped guiding block are respectively in abutting cooperation with the upper side surfaces of the corresponding second blocking blocks.

[0007] The definitions before are as follows: Along the helix direction of the internal thread on the inner side wall of the screw cap, the side of the arc-shaped positioning block that contacts the first blocking block first is the front, and the side of the arc-shaped positioning block that contacts the first blocking block later is the rear.

[0008] When the screw cap is gradually tightened downward on the nozzle, after the arc-shaped positioning block passes over the second blocking block, the front end part of the arc-shaped positioning block is located in the corresponding first card slot. At the same time, the lower side surface of the arc-shaped guiding block guides along the upper side surface of the corresponding second blocking block. Until the screw cap is completely tightened on the nozzle, the front end parts of the two arc-shaped positioning blocks are respectively in snap-fit with the corresponding first blocking blocks, and the lower side surfaces of the two arc-shaped guiding blocks are in abutting cooperation with the upper side surfaces of the corresponding second blocking blocks, so that the lower end surface of the lower opening of the screw cap and the limiting plane of the nozzle are fixedly abutted at four points simultaneously, which can not only prevent the screw cap from shaking relative to the nozzle, avoid the self-standing bag nozzle from falling and deforming or even leaking liquid, but also prevent the screw cap from being over-tightened, and avoid problems such as deformation, broken ring, and burst cap of the screw cap.

[0009] When the user forcefully unscrews the screw cap, the screw cap rotates in the reverse direction, and the two one-way teeth are buckled by the corresponding second card slots, so that the resistance between the connecting ring and the second card slot quickly hooks and breaks each tear strip on the connecting ring, destroying the connection of the connecting ring, and then unscrewing the screw cap from the nozzle.

[0010] In a preferred embodiment, the height of the front end portion of the second blocking block is greater than the height of the rear end portion of the second blocking block, the height of the rear end portion of the second blocking block is greater than the limiting plane, a clamping block is formed on the rear side surface of the second blocking block, and the rear end portions of the arc-shaped positioning blocks respectively correspond to the corresponding clamping blocks. If the tightened screw cap accidentally rotates back, the rear end portion of the arc-shaped positioning block on the screw cap will abut and cooperate with the clamping block on the second blocking block due to the rotation back, preventing the screw cap from rotating back.

[0011] In a preferred embodiment, the height of the arc-shaped positioning block is 2.0 mm - 2.2 mm, and the height of the first blocking block is 1.7 mm - 2.0 mm. Usually, as in the prior art, the depth of the arc-shaped groove of the existing screw cap is 0.6 mm - 0.8 mm, and the height of the positioning bump on the limiting ring is 0.5 mm - 0.7 mm, so that the depth of the arc-shaped groove is limited and the height of the positioning bump is relatively low, and it is easy to over-tighten the screw cap. Furthermore, by greatly increasing the heights of the arc-shaped positioning block and the first blocking block, the front end portion of the arc-shaped positioning block can be better clamped and cooperated with the first clamping groove of the first blocking block, effectively preventing the screw cap from being over-tightened.

[0012] In a preferred embodiment, the outer side surface of the first blocking block is a guiding arc surface, and the guiding arc surface is located on the front side of the second clamping groove; when the screw cap is gradually tightened downward on the nozzle, the guiding arc surface contacts and cooperates with the inner side wall surface of the corresponding one-way tooth. During the process of tightening the screw cap on the nozzle, the inner side surface of the one-way tooth can be guided along the guiding arc surface on the outside of the first blocking block, so that the one-way tooth can cross the first blocking block, and then the front end portion of the arc-shaped positioning block is located in the corresponding first clamping groove.

[0013] Since the thickness of the limiting ring on the outer side wall of the existing nozzle is relatively thin, and there are two opposite notches on the outer edge of the limiting ring. When filling this kind of self-standing bag with a nozzle, each nozzle is inserted on the bag inserting mechanism, and the openings of each nozzle are arranged upward, and each nozzle is filled by a filling machine. During filling, the limiting rings of two adjacent nozzles are next to each other, and it is easy for the two notches of the limiting ring to cross, resulting in the two self-standing bags being stuck, and manual handling of the stuck bags is required, affecting the filling efficiency. Furthermore, in a more preferred embodiment, the outer side surface of the second blocking block is flush with the edge of the limiting plane and forms a guiding vertical plane. During filling, the limiting planes of two adjacent nozzles are next to each other, and the guiding vertical planes of the two nozzles are in contact with each other, increasing the contact area, which can avoid the two self-standing bags from being stuck and improve the filling efficiency.

[0014] Compared with the prior art, the present utility model has the following advantages:

[0015] This self-standing bag nozzle that prevents over-tightening can not only prevent the screw cap from wobbling relative to the nozzle, avoiding deformation or even liquid leakage caused by the fall of this self-standing bag nozzle, but also prevent the screw cap from being over-tightened, avoiding problems such as deformation, broken rings, and blown caps of the screw cap. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a specific embodiment of the present invention;

[0017] Figure 2 is Figure 1 a sectional view taken along line A-A in

[0018] Figure 3 is Figure 1 a schematic structural diagram of the separated screw cap and nozzle in

[0019] Figure 4 is Figure 3 a schematic structural diagram of the guiding vertical planes of two nozzles in contact with each other in

[0020] Figure 5 is Figure 4 a front view of

[0021] Figure 6 a schematic structural diagram of the self-standing bag nozzle in the background art of the present invention;

[0022] Figure 7 a schematic structural diagram of the inner side of the screw cap in the background art of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present invention will be specifically described below in conjunction with the accompanying drawings and specific embodiments.

[0024] As Figures 1-5As shown in the figure, the self-standing bag nozzle for preventing over-twisting in this embodiment includes a screw cap 1, a nozzle 2, two first blocking blocks 3, two second blocking blocks 4, two arc-shaped positioning blocks 5 and two arc-shaped guiding blocks 6. An internal thread 11 is provided on the inner side wall of the screw cap 1, and an external thread 21 is provided on the outer side wall of the nozzle 2. The screw cap 1 and the nozzle 2 are threadedly connected. A connecting ring 12 is provided at the opening edge of the lower end of the screw cap 1, and two one-way teeth 13 are provided on the inner side wall of the connecting ring 12. The orientation of the one-way teeth 13 is the same as the helix direction of the internal thread 11 on the inner side wall of the screw cap 1. A limiting plane 22 is provided on the outer side wall of the nozzle 2, and the limiting plane 22 is below the external thread 21 on the nozzle 2. Each of the first blocking blocks 3 and the second blocking blocks 4 is alternately arranged on the limiting plane 22 in sequence along the helix direction of the internal thread 11 on the inner side wall of the screw cap 1. Each of the arc-shaped positioning blocks 5 and the arc-shaped guiding blocks 6 is alternately arranged on the lower end surface of the lower end opening of the screw cap 1 in sequence along the helix direction of the internal thread 11 on the inner side wall of the screw cap 1. The upper side surface of the second blocking block 4 gradually slopes downward along the helix direction of the internal thread 11 of the screw cap 1, and the lower side surface of the arc-shaped guiding block 6 gradually slopes downward along the helix direction of the internal thread 11 of the screw cap 1. A first card slot 31 is provided on the front side surface of the first blocking block 3, and a second card slot 32 that cooperates with the one-way tooth 13 is provided on the rear side surface of the first blocking block 3. The second card slot 32 is outside the first card slot 31. After the screw cap 1 is tightened on the nozzle 2, the front end portions of each of the arc-shaped positioning blocks 5 are respectively located in the corresponding first card slots 31, and the lower side surfaces of each of the arc-shaped guiding blocks 6 are respectively in abutting cooperation with the upper side surfaces of the corresponding second blocking blocks 4.

[0025] The above definition is: Along the helix direction of the internal thread 11 on the inner side wall of the screw cap 1, the side of the arc-shaped positioning block 5 that contacts the first blocking block 3 first is the front, and the side of the arc-shaped positioning block 5 that contacts the first blocking block 3 later is the rear.

[0026] When the screw cap 1 is gradually tightened downward on the nozzle 2, after the arc-shaped positioning block 5 passes over the second blocking block 4, the front end portion of the arc-shaped positioning block 5 is located in the corresponding first card slot 31. At the same time, the lower side surface of the arc-shaped guiding block 6 guides along the upper side surface of the corresponding second blocking block 4. Until the screw cap 1 is completely tightened on the nozzle 2, the front end portions of the two arc-shaped positioning blocks 5 are respectively in clamping cooperation with the corresponding first blocking blocks 3, and the lower side surfaces of the two arc-shaped guiding blocks 6 are in abutting cooperation with the upper side surfaces of the corresponding second blocking blocks 4, so that the lower end surface of the lower end opening of the screw cap 1 and the limiting plane 22 of the nozzle 2 are fixedly abutted at four points simultaneously, which can not only prevent the screw cap 1 from shaking relative to the nozzle 2, avoid the self-standing bag nozzle 2 from falling and deforming or even leaking liquid, but also prevent the screw cap 1 from being over-twisted, avoiding problems such as deformation, broken ring, and burst cover of the screw cap 1.

[0027] When the user twists the screw cap 1 with force, the screw cap 1 rotates in the reverse direction, and the two one-way teeth 13 are respectively buckled by the corresponding second card slots 32, so that the resistance between the connecting ring 12 and the second card slots 32 quickly hooks and breaks each tear strip on the connecting ring 12, destroying the connection of the connecting ring 12, and then screwing off the screw cap 1 from the nozzle 2.

[0028] The height of the front end part of the second blocking block 4 is greater than the height of the rear end part of the second blocking block 4, the height of the rear end part of the second blocking block 4 is greater than the limiting plane 22, a clamping block 41 is formed on the rear side surface of the second blocking block 4, and the rear end parts of the arc-shaped positioning blocks 5 respectively correspond to the corresponding clamping blocks 41. If the tightened screw cap 1 still accidentally rotates back, the rear end part of the arc-shaped positioning block 5 on the screw cap 1 will be in butt joint with the clamping block 41 on the second blocking block 4 due to the rotation back, preventing the screw cap 1 from rotating back.

[0029] The height of the arc-shaped positioning block 5 is 2.0 mm - 2.2 mm, and the height of the first blocking block 3 is 1.7 mm - 2.0 mm. Usually, the depth of the arc-shaped groove of the existing screw cap 1 in the background technology is 0.6 mm - 0.8 mm, and the height of the positioning convex point on the limiting ring is 0.5 mm - 0.7 mm, so that the depth of the arc-shaped groove is limited and the height of the positioning convex point is also low, and it is easy for the screw cap 1 to be screwed over. Then, the heights of the arc-shaped positioning block 5 and the first blocking block 3 are greatly increased, so that the front end part of the arc-shaped positioning block 5 can be better clamped and matched with the first card slot 31 of the first blocking block 3, effectively preventing the screw cap 1 from being screwed over.

[0030] The outer side surface of the first blocking block 3 is a guiding arc surface 33, and the guiding arc surface 33 is located in front of the second card slot 32; when the screw cap 1 is gradually tightened down on the nozzle 2, the guiding arc surface 33 is in contact and cooperation with the inner side wall surface of the corresponding one-way tooth 13. During the process of tightening the screw cap 1 on the nozzle 2, the inner side surface of the one-way tooth 13 can be guided along the guiding arc surface 33 on the outer side of the first blocking block 3, so that the square one-way tooth 13 can cross the first blocking block 3, and then the front end part of the arc-shaped positioning block 5 is located in the corresponding first card slot 31.

[0031] Since the thickness of the limiting ring on the outer side wall of the existing suction nozzle is relatively thin, and there are two opposite notches on the outer edge of the limiting ring. When this self-standing bag with a suction nozzle is being filled, each suction nozzle is inserted on the bag inserting mechanism, and the openings of each suction nozzle are arranged upward, and the filling machine fills each suction nozzle. During filling, the limiting rings of two adjacent suction nozzles are next to each other, which easily causes the two notches of the limiting ring to cross, resulting in the jamming of two self-standing bags, and manual handling of the jammed bags is required, which affects the filling efficiency. Furthermore, in a more preferred solution, the outer side surface of the second blocking block 4 is flush with the edge of the limiting plane 22 and forms a guiding vertical plane 7. During filling, the limiting planes 22 of two adjacent suction nozzles 2 are next to each other, and the guiding vertical planes 7 of the two suction nozzles 2 are in contact with each other. The guiding vertical plane 7 increases the contact area, which can prevent the jamming of two self-standing bags and improve the filling efficiency.

[0032] In addition, it should be noted that for the specific embodiments described in this specification, the names of their respective parts and the like can be different. Any equivalent or simple changes made according to the structure, features, and principles described in the inventive concept of the utility model patent are included in the protection scope of the utility model patent. Those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined by this claim book, they should all belong to the protection scope of the utility model.

Claims

1. A self-standing bag nozzle for preventing over-tightening, comprising a screw cap and a nozzle. An internal thread is provided on the inner side wall of the screw cap, and an external thread is provided on the outer side wall of the nozzle. The screw cap and the nozzle are connected by threads. A connecting ring is provided at the opening edge of the lower end of the screw cap. Two one-way teeth are provided on the inner side wall of the connecting ring, and the orientation of the one-way teeth is the same as the helix direction of the internal thread on the inner side wall of the screw cap. A limiting plane is provided on the outer side wall of the nozzle, and the limiting plane is below the external thread on the nozzle. It is characterized in that: It further includes two first blocking blocks, two second blocking blocks, two arc-shaped positioning blocks and two arc-shaped guiding blocks. The first blocking blocks and the second blocking blocks are alternately arranged on the limiting plane in sequence along the rotation direction of the internal thread on the inner side wall of the screw cap; the arc-shaped positioning blocks and the arc-shaped guiding blocks are alternately arranged on the lower end surface of the lower end opening of the screw cap in sequence along the rotation direction of the internal thread on the inner side wall of the screw cap. The upper side surface of the second blocking block gradually inclines downward along the rotation direction of the internal thread of the screw cap, and the lower side surface of the arc-shaped guiding block gradually inclines downward along the rotation direction of the internal thread of the screw cap; a first card slot is provided on the front side surface of the first blocking block, and a second card slot matched with the one-way tooth is provided on the rear side surface of the first blocking block. The second card slot is located outside the first card slot; after the screw cap is tightened on the suction nozzle, the front end parts of the arc-shaped positioning blocks are respectively located in the corresponding first card slots, and the lower side surfaces of the arc-shaped guiding blocks are respectively in abutting cooperation with the upper side surfaces of the corresponding second blocking blocks.

2. The self-standing bag nozzle for preventing over-twisting according to claim 1, characterized in that: The height of the front end part of the second blocking block is greater than the height of the rear end part of the second blocking block. The height of the rear end part of the second blocking block is greater than the limiting plane. A clamping block is formed on the rear side surface of the second blocking block. The rear end parts of the arc-shaped positioning blocks respectively correspond to the corresponding clamping blocks.

3. The self-standing bag nozzle for preventing over-twisting as claimed in claim 1 or 2, wherein: The height of the arc-shaped positioning block is 2.0 mm - 2.2 mm, and the height of the first blocking block is 1.7 mm - 2.0 mm.

4. The self-standing bag nozzle for preventing over-twisting as claimed in claim 1, wherein: The outer side surface of the first blocking block is a guiding arc surface, and the guiding arc surface is located on the front side of the second card slot; when the screw cap is gradually tightened downward on the suction nozzle, the guiding arc surface is in contact and cooperation with the inner side wall surface of the corresponding one-way tooth.

5. The self-standing bag nozzle for preventing over-twisting according to claim 1, characterized in that: The outer side surface of the second blocking block is flush with the edge of the limiting plane and forms a guiding vertical plane.

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