Packaging tube capable of controlling unscrewing length of paste

Abstract

The utility model discloses a packaging tube with the paste screwing-out length controllable. The packaging tube comprises a base and a middle bundle core matched with the base in an inserted mode. The middle bundle core comprises a driving element, a guide element which is in running fit with the driving element, and a storage element which is circumferentially limited with the guide element and is used for storing paste; one of the driving element and the guiding element is a fixed part, the other one is a movable part, one of the base and the movable part is provided with a gear ring, the other one is provided with positioning teeth, the gear ring is provided with a plurality of clamping teeth arranged in the circumferential direction, and after the median bundle core is inserted into the base, the positioning teeth are kept meshed with the clamping teeth. The movable part is allowed to rotate in the first direction relative to the base, and the movable part is prevented from rotating in the opposite second direction relative to the base. Compared with the prior art, the unscrewing amount of the paste can be controlled, the storage element can be rotated after the base is detached under specific conditions, and use is more flexible and convenient.

Description

Technical Field

[0001] This application relates to the field of cosmetic packaging, and in particular to a packaging tube with controllable length of ointment that can be twisted out. Background Technology

[0002] As existing lipsticks become increasingly moisturizing and softer, to avoid waste caused by excessive twisting and sagging of the lipstick during use, packaging tubes capable of unidirectional rotation have been introduced to the market. For example, document CN212465246U discloses a core assembly including a spiral, beads, and a middle sleeve. A chuck is fixed to the outer circumference of the spiral, and a unidirectional rotation structure is provided between the chuck and the middle sleeve to restrict the rotation direction of the middle sleeve. The unidirectional rotation structure consists of unidirectional teeth respectively set on the chuck and the spiral and cooperating with each other. The two sides of the tip of the unidirectional teeth are a guide tooth surface and a non-reverse tooth surface, respectively. When it is necessary to extend the lipstick, simply rotate the spiral and the chuck in the forward direction.

[0003] However, in actual use, consumers may rotate the beads too much, resulting in too much paste being dispensed. On the other hand, during transportation, the core may be bumped, causing partial rotation. Therefore, during actual filling, the beads may not be in the initial bottom position, resulting in insufficient filling volume. Therefore, further improvements are needed. Utility Model Content

[0004] To address the aforementioned problems, this invention provides a packaging tube with controllable length of ointment that can be twisted out.

[0005] The ointment is unscrewed into a packaging tube of controllable length, including a base and a central core that is inserted into the base; the central core includes a driving element with a cylindrical structure and a spiral groove on the inner wall, a guiding element rotatably connected to the driving element, and a storage element for receiving the ointment that is circumferentially limited between the storage element and the guiding element. A portion of the storage element extends into the driving element and engages with the spiral groove. When the driving element and the guiding element rotate relative to each other, the storage element can be driven to move axially.

[0006] One of the driving element and the guiding element is a fixed component, and the other is a movable component. After the central core is inserted into the base, the fixed component is detachably connected to the base, and the movable component can rotate relative to the base.

[0007] One of the base and the movable component is provided with a toothed ring, and the other is provided with positioning teeth. The toothed ring has a plurality of circumferentially arranged locking teeth. After the central core is inserted into the base, the positioning teeth and the locking teeth are engaged, allowing the movable component to rotate relative to the base in a first direction, while preventing the movable component from rotating relative to the base in the opposite second direction.

[0008] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0009] Optionally, each of the locking teeth has a first guide tooth surface and a first anti-reverse tooth surface, the first guide tooth surface being arranged obliquely along the first direction, and the first anti-reverse tooth surface being disposed on the opposite side of the first guide tooth surface.

[0010] Optionally, the storage element includes a cylinder and a drive rod, the drive rod extending into the drive element and engaging with the spiral groove, the guide element having a limiting hole engaging with the drive rod, and the drive element being fixed relative to the base after the middle core is inserted into the base.

[0011] Optionally, the middle core includes an extension element fixedly connected to the guide element, and the cylinder is movably disposed inside the extension element.

[0012] Optionally, the toothed ring is disposed at the bottom end of the guide element.

[0013] Optionally, the inner wall of the base is provided with a collar, and the top end of the collar is provided with the positioning teeth.

[0014] Optionally, the positioning teeth are inclined to one side circumferentially and are elastic.

[0015] Optionally, the base includes an outer bottom tube and an inner bottom tube, the collar is arranged on the inner wall of the outer bottom tube, and the bottom of the inner bottom tube is inserted into the outer bottom tube to abut against the collar.

[0016] Optionally, an axial limiting mechanism and a circumferential limiting mechanism are provided between the driving element and the base.

[0017] Optionally, the axial limiting mechanism includes a convex ring disposed on the driving element and a protrusion disposed on the inner surface of the base that engages with the convex ring; the circumferential limiting mechanism includes a mating part disposed on the driving element with a non-circular cross section and a receiving cavity inside the base that is adapted to the mating part.

[0018] This application features a toothed ring on one of the base and the movable part, and a positioning tooth on the other. When the central core is inserted into the base and rotates, it can only rotate in one direction. When the paste needs to be rotated back, the central core can be disassembled from the base, allowing the drive element and guide element to rotate freely relative to each other. Compared with the prior art, this application not only achieves controllable paste discharge but also allows the storage element to be rotated back after disassembling the base under certain circumstances, making it more flexible and convenient to use. Attached Figure Description

[0019] Figure 1 A cross-sectional view of a packaging tube with controllable ointment extrusion length provided in this application, omitting the cap;

[0020] Figure 2 An exploded view of a packaging tube with controllable ointment extrusion length provided in this application, omitting the cap;

[0021] Figure 3 This is an exploded view of the middle core.

[0022] Figure 4 This is a schematic diagram of the fit between the gear ring and the collar.

[0023] Figure 5 This is a schematic diagram of the collar structure;

[0024] Figure 6 This is a sectional view of the outer bottom tube;

[0025] Figure 7 A schematic diagram of a packaging tube with controllable ointment discharge length provided in this application.

[0026] The annotations in the figure are explained as follows:

[0027] 100. Middle core; 110. Drive element; 111. Spiral groove; 112. Convex ring; 113. Mating part; 120. Guide element; 121. Limiting hole; 122. Stepped surface; 125. Gear ring; 126. Clamping tooth; 127. First guide tooth surface; 128. First anti-reverse tooth surface; 130. Storage element; 140. Cylinder; 150. Transmission rod; 151. Protrusion; 152. Thread; 160. Extension element;

[0028] 200. Base; 210. Outer bottom tube; 211. Protrusion; 212. Storage cavity; 213. First step; 214. First positioning groove; 215. Annular protrusion; 216. Second positioning groove; 220. Inner bottom tube; 221. Annular groove; 222. Second positioning rib; 230. Collar; 231. Positioning tooth; 232. Notch; 233. Second guide tooth surface; 234. Second anti-reverse tooth surface; 235. First positioning rib; 240. Weight;

[0029] 300. Cover. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this application, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a system, product, or device that includes a series of units is not necessarily limited to those units that are explicitly listed, but may include other units that are not explicitly listed or that are inherent to such products or devices.

[0035] See Figures 1-7 One embodiment of this application provides a packaging tube with controllable twist-out length for ointment-like cosmetics (such as lipsticks, lip glosses, etc.). The packaging tube includes a base 200 and a central core 100 that inserts into the base 200. The central core 100 is the component that holds the ointment, and the base 200 is used in conjunction with the central core 100 for easy gripping. The packaging tube also includes a cap 300, which, together with the base 200, seals the central core 100 to prevent the substances in the ointment from evaporating and becoming ineffective.

[0036] The middle core 100 includes a driving element 110, a guiding element 120, and a storage element 130. The driving element 110 has a cylindrical structure with a spiral groove 111 on its inner wall. In some embodiments, such as... Figure 1 As shown, the spiral groove 111 is arranged in a part of the drive element 110, but obviously it can also be arranged along the entire length of the drive element 110.

[0037] The guide element 120 is rotatably connected to the drive element 110. In some embodiments, the guide element 120 is also a cylindrical structure, the top of the drive element 110 is inserted into the interior of the guide element 120, the inner wall of the guide element 120 is provided with a protruding ring, and the outer wall of the corresponding drive element 110 is provided with an annular groove. The protruding ring and the annular groove engage, so that the guide element 120 and the drive element 110 are axially fixed, but can rotate relative to each other in the circumferential direction.

[0038] The storage element 130 is used to hold the paste, partially extending into the interior of the drive element 110 and engaging with the spiral groove 111, but its circumferential rotation is restricted by the guide element 120. When the drive element 110 and the guide element 120 rotate relative to each other, the drive element 110 can drive the storage element 130 to move axially, and the guide element 120 can restrict the rotation of the storage element 130.

[0039] In some embodiments, the storage element 130 includes a cylinder 140 containing ointment and a drive rod 150 connecting the cylinder 140. The drive rod 150 extends into the drive element 110 and engages with the spiral groove 111. In some embodiments, the drive rod 150 is flat, and the shape of the limiting hole 121 is adapted to the cross-section of the drive rod 150. A protrusion 151 is provided on the wider side of the drive rod 150 to prevent the drive rod 150 from disengaging from the limiting hole 121, and a thread 152 is arranged axially on the narrower side to engage with the spiral groove 111.

[0040] In some embodiments, the middle core 100 includes an extension element 160 fixedly connected to the guide element 120, and the cylinder 140 is movably disposed inside the extension element 160. In some embodiments, the guide element 120 has a stepped surface 122 with a reduced diameter, and the bottom end of the extension element 160 is fixed against the stepped surface 122, with the outer surfaces of both being flush.

[0041] In some embodiments, the drive element 110 is sleeved on the outside of the guide element 120, the guide element 120 has a guide groove arranged in the axial direction, the storage element 130 is placed inside the guide element 120, and the outer wall is provided with a connecting ear that extends through the guide groove into the drive element 110. The connecting ear cooperates with the spiral groove, so that when the drive element 110 rotates relative to the guide element 120, the storage element 130 can be driven to move in the axial direction.

[0042] The middle core 100 and the base 200 are detachably connected. The middle core 100 can be replaced as needed, allowing the base 200 and the cover 300 to be reused, reducing resource waste. After the middle core 100 and the base 200 are inserted, one of the driving element 110 and the guiding element 120 is detachably connected to the base 200, while the other can rotate relative to the base 200. In this application, the component connected to the base 200 is defined as a fixed component, and the component that can rotate relative to the base 200 is defined as a movable component.

[0043] like Figure 1 As shown, in this embodiment, the driving element 110 is a fixed component, and the guiding element 120 is a movable component. In some embodiments, an axial limiting mechanism and a circumferential limiting mechanism are provided between the driving element 110 and the base 200.

[0044] In some embodiments, the axial limiting mechanism includes a convex ring 112 disposed on the driving element 110 and a protrusion 211 disposed on the inner surface of the base 200 and engaging with the convex ring 112. Considering the stability of the structure, the number of protrusions 211 is multiple and arranged circumferentially.

[0045] In some embodiments, the circumferential limiting mechanism includes a mating portion 113 with a non-circular cross-section disposed on the driving element 110 and a receiving cavity 212 inside the base 200 that is adapted to the mating portion 113. There are no special requirements for the cross-sectional shape. In this embodiment, the cross-sectional shape is a regular hexagon.

[0046] After the middle core 100 is inserted into the base 200, a reversible mechanism is formed between the moving part and the base 200. This reversible mechanism only allows the moving part to rotate in a single direction, such as allowing rotation along a first direction but preventing it from rotating along a second direction, where the first and second directions are opposite. For example... Figure 4 In the diagram, the X direction is the first rotation direction, and the Y direction is the second rotation direction.

[0047] In some embodiments, the anti-reverse mechanism includes a gear ring 125 and positioning teeth 231, wherein the gear ring 125 includes a plurality of locking teeth 126 arranged continuously along the circumferential direction.

[0048] In some embodiments, the toothed ring 125 is disposed on the movable part and further disposed at the bottom of the guide element 120, and the positioning tooth 231 is disposed on the base 200. After the middle core 100 is inserted into the base 200, the retaining tooth 126 and the positioning tooth 231 engage, allowing the guide element 120 to move in a single direction while preventing it from moving in the opposite direction.

[0049] When the positioning tooth 231 moves relative to the toothed ring 125, it will engage with the next tooth each time it passes over a tooth. The collision between the two will produce a "click" sound, indicating to the user that the cream is being unscrewed, thus effectively controlling the unscrewing length of the cream.

[0050] After the central core 100 is separated from the base 200, the positioning tooth 231 and the locking tooth 126 separate, and the driving element 110 and the guiding element 120 can rotate freely relative to each other.

[0051] When applying the cream normally, insert the core 100 into the base 200 and rotate them relative to each other. At this time, the moving part rotates relative to the base in the first direction and unscrews the cream.

[0052] In specific situations such as excessive extrusion of the paste or the need for filling, the central core 100 is separated from the base 200, allowing the drive element 110 and the guide element 120 to rotate freely relative to each other, and the paste can rotate back to the central core 100 or the storage element 130 to return to the initial position at the bottom.

[0053] In some embodiments, a toothed ring 125 is disposed at the bottom end of the guide element 120, and a collar 230 is disposed on the inner wall of the base 200, with a positioning tooth 231 disposed at the top end of the collar 230. In some embodiments, the number of positioning teeth 231 is two, and they are arranged symmetrically.

[0054] In some embodiments, see Figures 4-5 The locking tooth 126 is a one-way locking tooth, and each tooth tip has a first guide tooth surface 127 and a first anti-reverse tooth surface 128. The first guide tooth surface 127 is arranged inclined along the first direction, and the first anti-reverse tooth surface 128 is located on the opposite side of the first guide tooth surface 127. The gear ring 125 has an end face perpendicular to the axis. The first anti-reverse tooth surface 128 is perpendicular to the end face of the gear ring 125, and the first guide tooth surface 127 forms an angle of 60° to 70° with the end face of the gear ring.

[0055] Correspondingly, the positioning tooth 231 is inclined to one side in the circumferential direction and has elasticity. In some embodiments, the end of the collar 230 is provided with a notch 232, which is located below the positioning tooth 231, and the length of the notch 232 in the circumferential direction is greater than the length of the positioning tooth 231, so that when the positioning tooth 231 is engaged and pressed with the retaining tooth 126, the notch 232 can provide sufficient deformation space for the positioning tooth 231.

[0056] Furthermore, the positioning tooth 231 has a second guide tooth surface 233 and a second anti-reverse tooth surface 234. During engagement, the first guide tooth surface 127 fits against the second guide tooth surface 233, and the first anti-reverse tooth surface 128 fits against the second anti-reverse tooth surface 234. When the gear ring 125 rotates relative to the positioning tooth 231, the first guide tooth surface 127 and the second guide tooth surface 233 press against each other, and the positioning tooth 231 deforms towards the notch 232 until it disengages from the locking tooth. After passing the locking tooth, the positioning tooth 231 returns to its original position and engages with the adjacent locking tooth 126.

[0057] In some embodiments, the base 200 is provided with an elastic element that acts on the collar 230. When the positioning tooth 231 passes over the retaining tooth, the elastic element deforms. The elastic element can be a helical spring.

[0058] See Figures 1-6 The base 200 includes an outer bottom tube 210 and an inner bottom tube 220. A collar 230 is arranged on the inner wall of the outer bottom tube 210, and the bottom of the inner bottom tube 220 is inserted into the outer bottom tube 210 to abut against the collar 230.

[0059] Regarding the connection method of the collar 230, the inner wall of the base 200 is narrowed to form a first step 213, and the bottom of the collar 230 abuts against the first step 213. Of course, in order to restrict the circumferential rotation of the collar 230, the collar 230 is provided with a first positioning rib 235 arranged along the axial direction. Correspondingly, the inner wall of the base 200 is provided with a first positioning groove 214 that cooperates with the first positioning rib 235.

[0060] Regarding the connection method of the inner bottom tube 220, the outer peripheral wall of the inner bottom tube 220 is provided with an annular groove 221 and an axially arranged second positioning rib 222, and the inner wall of the outer bottom tube 210 is provided with an annular protrusion 215 and an axially arranged second positioning groove 216. The annular groove 221 and the annular protrusion 215 cooperate to achieve axial positioning, and the second positioning rib 222 cooperates with the second positioning groove 216 to achieve circumferential positioning. The collar 230 is clamped between the inner bottom tube 220 and the first step 213. The inner bottom tube 220 extends partially to the outside of the outer bottom tube 210 to form a mating section that engages with the cover, preventing the cover from falling off.

[0061] In some embodiments, in order to make the base 200 tactile after the middle core 100 is detached from the base 200, a weight may also be provided at the bottom of the outer bottom tube 210.

[0062] The technical features of the embodiments described above can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0063] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A packaging tube with controllable length for the ointment, including a base and a central core that is inserted into the base; the central core includes a driving element with a cylindrical structure and a spiral groove on the inner wall, a guiding element rotatably connected to the driving element, and a storage element for receiving the ointment with circumferential limitation between the storage element and the guiding element, wherein a portion of the storage element extends into the driving element and engages with the spiral groove, and the storage element can be driven to move axially when the driving element and the guiding element rotate relative to each other; One of the driving element and the guiding element is a fixed component, and the other is a movable component. After the middle core is inserted into the base, the fixed component is detachably connected to the base, and the movable component can rotate relative to the base. characterized in that One of the base and the movable component is provided with a toothed ring, and the other is provided with positioning teeth. The toothed ring has a plurality of circumferentially arranged locking teeth. After the central core is inserted into the base, the positioning teeth and the locking teeth are engaged, allowing the movable component to rotate relative to the base in a first direction, while preventing the movable component from rotating relative to the base in the opposite second direction.

2. The packaging tube according to claim 1, characterized in that Each of the locking teeth has a first guide tooth surface and a first anti-reverse tooth surface, the first guide tooth surface being arranged obliquely along the first direction, and the first anti-reverse tooth surface being disposed on the opposite side of the first guide tooth surface.

3. The packaging tube of claim 1, wherein The storage element includes a cylinder and a transmission rod. The transmission rod extends into the drive element and engages with the spiral groove. The guide element has a limiting hole that engages with the transmission rod. The drive element is fixed relative to the base after the middle core is inserted into the base.

4. The packaging tube of claim 3, wherein The middle core includes an extension element fixedly connected to the guide element, and the cylinder is movably placed inside the extension element.

5. The packaging tube of claim 3, wherein The gear ring is disposed at the bottom end of the guide element.

6. The packaging tube of claim 5, wherein, The inner wall of the base is provided with a collar, and the top of the collar is provided with the positioning tooth.

7. The packaging tube of claim 2, wherein The positioning teeth are inclined to one side circumferentially and are elastic.

8. The packaging tube of claim 6, wherein, The base includes an outer bottom tube and an inner bottom tube. The collar is arranged on the inner wall of the outer bottom tube, and the bottom of the inner bottom tube is inserted into the outer bottom tube to abut against the collar.

9. The packaging tube of claim 3, wherein, An axial limiting mechanism and a circumferential limiting mechanism are provided between the driving element and the base.

10. The packaging tube of claim 9, wherein, The axial limiting mechanism includes a convex ring disposed on the driving element and a protrusion disposed on the inner surface of the base that engages with the convex ring; the circumferential limiting mechanism includes a mating part disposed on the driving element with a non-circular cross section and a receiving cavity inside the base that is adapted to the mating part.

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