A rotary push-type paste dispenser

Abstract

The utility model discloses a kind of rotary propelling type paste dispensers, belong to packaging container technical field.The dispenser includes paste containing unit, rotary drive unit and guide piece, wherein,paste containing unit includes bottle body with discharge port, piston and threaded rod connected with piston are slidably arranged in bottle body;Rotary drive unit is rotatably arranged at the bottom of bottle body, and is equipped with internal thread;Guide piece is arranged in bottle body, for the circumferential limit of threaded rod;Threaded rod is engaged with the internal thread of rotary drive unit, and its circumferential rotation is limited by guide piece, so that when rotating the rotary drive unit, it can drive threaded rod to move linearly by its internal thread, to drive piston to move to squeeze out paste.The utility model is simple and reliable, avoids the "broken pump" problem of press type pump bottle by pure mechanical transmission, and simultaneously can conveniently realize replacement function.

Description

Technical Field

[0001] This utility model relates to the field of daily packaging container technology, specifically to a dispenser for containing and quantitatively extruding paste. Background Technology

[0002] Currently, toothpaste packaging on the market is mainly divided into two categories: traditional squeeze tubes and press pump bottles. Both are inadequate in terms of convenience, environmental friendliness, and user experience.

[0003] Traditional squeeze tubes are fine for initial use, but in the later stages of use, the tube becomes wrinkled and the paste residue is difficult to squeeze out completely, resulting in unnecessary waste and affecting the user experience.

[0004] While push-type pump bottles (such as common vacuum pump toothpaste bottles) achieve the goals of quantitative dispensing and easy extraction to a certain extent, their internal structure is complex and highly dependent on spring return and vacuum sealing. After prolonged use, internal seals (such as pistons and valves) are prone to wear or aging, leading to air leaks. Once the vacuum is broken, a "pump failure" malfunction occurs, preventing normal toothpaste dispensing. Furthermore, the dispensing force of this type of pump bottle is directly related to the viscosity of the toothpaste. For different toothpaste formulations, the required pressing force varies significantly, resulting in inconsistent feel and a lack of uniform user experience.

[0005] In recent years, in response to environmental trends, the concept of refill packs has emerged in the market. However, the inherent design of both squeeze tubes and complex press-type pump bottles makes it difficult to adapt to convenient and reliable user-level refill solutions. This makes it difficult to effectively promote the refill pack model in the toothpaste packaging industry. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotary propulsion paste dispenser with a simple and reliable structure, stable extrusion, and convenient replacement capability.

[0007] To achieve the above objectives, this utility model provides a rotary propulsion paste dispenser, comprising:

[0008] The paste containing unit is equipped with a bottle body with a discharge port, a piston slidably disposed in the bottle body, and a threaded rod connected to the piston;

[0009] A rotary drive unit with internal threads is rotatably mounted at the bottom of the bottle.

[0010] A guide component, fixedly installed inside the bottle, is used to circumferentially limit the threaded rod.

[0011] The threaded rod engages with the internal thread of the rotary drive unit, and its circumferential rotation is restricted by the guide, so that when the rotary drive unit is rotated, the threaded rod can be driven to make linear motion through its internal thread, thereby driving the piston to move and extrude the paste.

[0012] As a further improvement of this utility model, the upper and lower edges of the piston are respectively provided with an outwardly extending upper sealing skirt and a lower sealing skirt.

[0013] As a further improvement of this utility model, a receiving groove is provided at the bottom center of the piston, and the top of the threaded rod is fixed to the receiving groove.

[0014] As a further improvement of this utility model, the top of the bottle body contracts to form a discharge port, and the shape of the upper surface of the piston is adapted to the shape of the contracted inner cavity at the top of the bottle body.

[0015] As a further improvement of this utility model, a one-way rotation limiting structure is provided between the rotary drive unit and the guide member. For example, the one-way rotation limiting structure includes a mating tooth provided on the rotary drive unit and a limiting tooth provided on the guide member.

[0016] As a further improvement of this utility model, the bottle body and the rotary drive unit are detachably connected.

[0017] As a further improvement of this utility model, the rotary drive unit includes a rotary base and a screw sleeve fixed on the rotary base, the screw sleeve being provided with an internal thread.

[0018] As a further improvement of this utility model, the guide is a guide seat, which is fixedly installed inside the bottle and located above the screw sleeve. A through hole matching the cross-sectional shape of the threaded rod is opened in the center of the guide seat. After the lower end of the threaded rod passes through the through hole of the guide seat, it engages with the internal thread of the screw sleeve.

[0019] As a further improvement of this utility model, it also includes a cover for sealing the discharge port.

[0020] Compared with the prior art, the rotary propulsion paste dispenser provided by this utility model has the following advantages:

[0021] By modularly integrating the functions of paste containment, rotation drive, and guiding limit, and employing a purely mechanical transmission scheme where a rotary drive component with internal threads drives a threaded rod, the container structure is significantly simplified, reducing the number of parts and assembly complexity. It abandons the precision vacuum sealing structure relied upon by traditional press-pump bottles, fundamentally avoiding "pump breakage" malfunctions caused by seal failure, thereby greatly improving product reliability and lifespan. Simultaneously, this design provides a stable and controllable paste extrusion method. Attached Figure Description

[0022] Figure 1 This is a three-dimensional exploded view of the rotary propulsion paste dispenser provided in the embodiment of the present utility model, which mainly shows the assembled state of the paste receiving unit and the rotary drive unit.

[0023] Figure 2 The overall structural cross-sectional view of the rotary propulsion paste dispenser provided in this embodiment of the utility model shows the assembly relationship of each component inside the container and the initial state before the paste is ejected.

[0024] Figure 3 for Figure 2 The enlarged schematic diagram of part A in the middle shows the sealing fit between the piston and its upper and lower sealing skirts and the inner wall of the bottle.

[0025] Figure 4 for Figure 2 The exploded view of the rotary propulsion paste dispenser shown shows that the paste receiving unit and the rotary drive unit are separate.

[0026] Explanation of the labels in the diagram:

[0027] 10-Paste containing unit, 1-Bottle body, 11-Discharge port, 111-Contraction cavity, 12-Slot, 2-Piston, 21-Upper sealing skirt, 22-Lower sealing skirt, 3-Threaded rod;

[0028] 20-Rotary drive unit, 4-Guide seat, 41-Through hole, 5-Screw sleeve, 51-Internal thread, 6-Rotary base, 61-Snap protrusion, 62-Matching tooth;

[0029] 7-Capping, 8-Paste. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent transformations or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the protection scope of the present invention.

[0031] This invention provides a mechanical propulsion system driven by a rotating bottom. The system adopts a modular design, with its core comprising a paste-containing unit and a rotary drive unit. The rotary drive unit drives a piston within the paste-containing unit via a purely mechanical threaded transmission to extrude the paste. Depending on application requirements, the paste-containing unit and the rotary drive unit can be designed as a fixed connection to form a disposable product, or as a detachable connection to achieve a replaceable packaging function, thereby meeting the reliability, economy, and environmental protection requirements in different scenarios.

[0032] Based on the above concept, the participants Figures 1 to 4As shown, this utility model provides a rotary propulsion paste dispenser, which is particularly suitable for packaging and quantitatively extruding paste or emulsion substances, such as toothpaste, ointment, face cream, etc. (hereinafter collectively referred to as paste 8). The dispenser mainly includes a paste receiving unit 10 for storing paste 8, a rotary drive unit 20 for driving paste 8 to be extruded, and a sealing cap 7 for sealing.

[0033] like Figure 2 and Figure 4 As shown, the paste containing unit 10 includes a bottle body 1, a piston 2, and a threaded rod 3. The bottle body 1 is generally cylindrical (it can also be a square tube or a polygonal tube), with its top narrowing to form an outlet 11 for extruding the paste 8, thereby forming a narrowed inner cavity 111 inside the top of the bottle body 1. The piston 2 is slidably disposed inside the bottle body 1 and is preferably made of an elastic material (e.g., silicone).

[0034] like Figure 3 As shown in the enlarged view, the upper and lower edges of piston 2 are respectively provided with an outwardly extending upper sealing skirt 21 and a lower sealing skirt 22. This double-skirt structure has significant advantages in dynamic sealing and cleaning efficiency compared to a single-skirt design. On the one hand, the upper sealing skirt 21 mainly prevents the paste 8 from leaking downwards when the piston moves upwards, while the lower sealing skirt 22 mainly prevents air from entering the paste cavity from the bottom and causing contamination when the piston is stationary or vibrating. Together, they form a complete bidirectional dynamic sealing system. On the other hand, during the upward movement of piston 2, the upper sealing skirt 21 acts as the main scraper to scrape the paste 8 off the bottle wall, while the lower sealing skirt 22 acts as the secondary scraper to perform secondary cleaning of residual trace amounts of paste. At the same time, the double-skirt structure provides more uniform radial support force, keeping piston 2 stable during long-stroke movement and reducing the risk of uneven wear. In addition, this double-skirt structure forms two independent pressure chambers between the inner wall of bottle 1 and the main body of piston 2, which helps to balance the pressure difference between the upper and lower parts of piston 2, making the propulsion movement smoother and improving the operating feel.

[0035] The threaded rod 3 is fixedly connected to the center of the piston 2 and extends downward. For example, the two can be reliably connected by means of snap-fit, thread, or interference fit. In one specific embodiment, a receiving groove is provided at the center of the bottom of the piston 2, and the top of the threaded rod 3 is adaptedly fixed in the receiving groove.

[0036] Furthermore, to optimize the extrusion efficiency of the paste and reduce residue, the shape of the upper surface of the piston 2 is adapted to the shape of the constricted inner cavity 111 at the top of the bottle 1. Specifically, an upwardly protruding ejector portion 23 is provided in the middle of the upper surface of the piston 2, and the shape of the ejector portion 23 preferably matches the shape of the constricted inner cavity 111 at the top of the bottle 1. When the piston 2 moves to the top of its stroke, the ejector portion 23 can closely fit or approach the inner surface of the constricted inner cavity 111, thereby effectively pushing out the paste 8 located in this area, significantly reducing the amount of paste residue at the top of the bottle.

[0037] By designing a shape-adaptive ejector portion 23, the amount of cream residue in the "dead corner" area at the top of the bottle can be significantly reduced, greatly improving the cream utilization rate (for example, reducing the residue rate from 3-5% in conventional designs to below 1%). In practical applications, by optimizing the curved shape and hardness of the ejector portion 23, the excellent effect of "no residue" can be infinitely approached.

[0038] In this invention, the rotary drive unit 20, as the core module for realizing the rotary drive function, is connected to the bottom of the paste containing unit 10. Its specific implementation can be flexibly varied depending on the design.

[0039] As a preferred implementation method, the reference Figure 1 , Figure 2 and Figure 4 As shown, the rotary drive unit 20 includes a rotary base 6, a screw sleeve 5, and a guide seat 4.

[0040] The rotating base 6 is rotatably mounted on the bottom of the bottle body 1. Its outer surface is typically textured with anti-slip patterns or coated with anti-slip material to facilitate user rotation. The screw sleeve 5 is a tubular component whose lower end is fixed to the center of the rotating base 6. The inner surface of the screw sleeve 5 is machined with internal threads 51. The guide seat 4 is fixedly installed in the inner cavity of the bottle body 1 and is located above the rotating base 6 and the screw sleeve 5. The center of the guide seat 4 has a through hole 41 that matches the cross-sectional shape of the threaded rod 3. The through hole 41 is preferably configured as a non-circular through hole, such as a D-shaped hole or a hole with a keyway.

[0041] During assembly, the lower end of the threaded rod 3 passes through the through hole 41 of the guide seat 4 and engages with the internal thread 51 of the screw sleeve 5. By matching and restricting the cross-sectional shape of the threaded rod 3 through the through hole 41 of the guide seat 4, circumferential rotation of the threaded rod 3 can be effectively prevented, allowing it to move only along the axial direction of the bottle body 1.

[0042] In this embodiment, the guide seat 4 is a specific form of guide component, which is fixedly installed inside the bottle body 1. The rotating base 6 and the screw sleeve 5 together constitute a separate structure of the rotary drive unit.

[0043] It is understood that the rotary drive unit of this utility model is not limited to the above-described split structure. In another embodiment, the internal thread 51 can be directly machined on the inner wall of the rotary base 6, so that the rotary base itself has both driving and transmission functions, thereby forming a more integrated rotary drive unit 20.

[0044] To further optimize the user experience and prevent accidental operation, a one-way rotation limiting structure can be provided between the rotating base 6 and the guide seat 4, such as serrated mating teeth 62 and limiting teeth 42 respectively provided on the surfaces of the two. This structure allows the rotating base 6 to rotate relative to the bottle 1 in the direction of dispensing the cream (usually clockwise) and provides a clear damping feel; while reverse rotation is mechanically locked, thereby effectively preventing contamination or waste caused by accidental retraction of the cream 8.

[0045] When the user needs to extrude paste 8, first remove the cap 7, then rotate the rotating base 6 in the extrusion direction (e.g., clockwise). The rotating base 6 drives the screw sleeve 5, which is fixedly connected to it, to rotate together. Since the circumferential rotation of the threaded rod 3 is restricted by the guide seat 4, the threaded rod 3 is forced to move upward in a straight line under the drive of the internal thread 51 of the screw sleeve 5. When the threaded rod 3 moves upward, it drives the piston 2, which is fixedly connected to its top, to rise together. The piston 2 squeezes the paste 8 above it, forcing the paste 8 to be stably and quantitatively extruded through the discharge port 11 at the top of the bottle 1. By precisely designing the pitch of the internal thread 51 of the screw sleeve 5, a fixed dose of paste 8 can be extruded every fixed angle of rotation (e.g., 90°, 180°, or a full turn), thereby achieving a precise quantitative effect. After use, the cap 7 is put back on the discharge port 11 to achieve a seal.

[0046] The connection between the rotary drive unit 20 and the paste containing unit 10 is flexible; it can be set as a fixed connection or configured as a detachable connection.

[0047] For example, the bottom of the bottle body 1 and the rotating base 6 can be connected via a detachable snap-fit ​​structure, a threaded connection, or a quick-release interface. A preferred embodiment is as follows: Figure 4 As shown, a slot 12 is provided on the inner wall of the bottom of the bottle 1, and a corresponding protrusion 61 is provided on the outer wall of the rotating base 6. The user can reliably lock or release the bottle by rotating the two components relative to each other at a certain angle. This detachable connection method allows the rotating drive unit 20 to be reused as a durable component, while the paste containing unit 10 can be replaced separately as a consumable component, thereby reducing long-term usage costs and minimizing material waste.

[0048] The replacement procedure is as follows: When the ointment 8 in the ointment container 10 is used up, the user separates the empty ointment container 10 from the rotary drive unit 20 through a specific operation (e.g., reverse rotation and pull-out). At this time, the rotary drive unit 20 (including the rotating base 6, the screw sleeve 5, and the guide seat 4) is retained as a reusable component. The user then takes a brand new ointment container 10 pre-filled with ointment (the piston 2 and the threaded rod 3 are already assembled inside the unit, and the lower end of the threaded rod 3 has a meshing interface that matches the rotary drive unit 20), aligns the bottom of the bottle 1 of the new ointment container 10 with it, and installs it onto the rotary drive unit 20 until the two are reliably connected by a snap or other connection method. During this installation process, the lower end of the threaded rod 3 in the new ointment container 10 will automatically mesh with the internal thread 51 of the screw sleeve 5 of the rotary drive unit 20, while the through hole 41 of the guide seat 4 will guide and constrain the circumferential movement of the threaded rod 3. After installation, users can operate the rotary pusher paste dispenser normally as described in the previous embodiment.

[0049] With the aforementioned replaceable design, users only need to purchase the durable rotary drive unit 20 once, and subsequently only need to replace the simple paste container unit 10. This not only reduces long-term operating costs, but also has greater environmental benefits by reducing the disposal of complex transmission components, while the replacement operation is simple and convenient.

[0050] The detailed descriptions listed above are merely specific descriptions of feasible implementations of this utility model, and are not intended to limit the scope of protection of this utility model. All equivalent implementations or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rotary push-type paste dispenser characterized by, include: The paste containing unit is equipped with a bottle body with a discharge port, a piston slidably disposed in the bottle body, and a threaded rod connected to the piston; A rotary drive unit with internal threads is rotatably mounted at the bottom of the bottle body; A guide component, fixedly disposed inside the bottle body, is used to circumferentially limit the threaded rod. The threaded rod engages with the internal thread of the rotary drive unit, and its circumferential rotation is restricted by the guide member. This allows the rotary drive unit to be rotated so that its internal thread can drive the threaded rod to move linearly, thereby moving the piston to extrude the paste.

2. A rotary impelling paste dispenser according to claim 1, characterized in that The piston has an outwardly extending upper sealing skirt and a lower sealing skirt on its upper and lower edges, respectively.

3. A rotary-propelled paste dispenser according to claim 1 or 2, characterized in that The piston has a receiving groove at its bottom center, and the top of the threaded rod is fixed to the receiving groove.

4. A rotary impelling paste dispenser according to claim 1 or 2, characterized in that The top of the bottle body contracts to form the discharge port, and the shape of the upper surface of the piston is adapted to the shape of the contracted inner cavity at the top of the bottle body.

5. A rotary impelling paste dispenser according to claim 1 or 2, characterized in that A one-way rotation limiting structure is provided between the rotary drive unit and the guide member.

6. A rotary impelling paste dispenser according to claim 5, characterized in that The unidirectional rotation limiting structure includes mating teeth on the rotation drive unit and limiting teeth on the guide member.

7. A rotary impelling paste dispenser according to claim 1 or 2, characterized in that The bottle body and the rotary drive unit are detachably connected.

8. A rotary impelling paste dispenser according to claim 1 or 2, characterized in that The rotary drive unit includes a rotary base and a screw sleeve fixed on the rotary base, and the screw sleeve is provided with the internal thread.

9. A rotary impelling paste dispenser according to claim 8, characterized in that The guide is a guide seat, which is fixedly installed inside the bottle and located above the screw sleeve. The center of the guide seat has a through hole that matches the cross-sectional shape of the threaded rod. The lower end of the threaded rod passes through the through hole of the guide seat and engages with the internal thread of the screw sleeve.

10. A rotary impelling paste dispenser according to claim 1 or 2, characterized in that It also includes a cap for closing the discharge port.

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