A fully sealed all-plastic pump head structure and a bottle body with the pump head structure

Abstract

The utility model discloses a kind of completely sealed all-plastic pump head structure and bottle with the pump head structure of this, wherein, completely sealed all-plastic pump head structure, comprising: elastic bag, check valve and guide rod;The top and bottom of elastic bag are provided with upper opening and lower opening respectively;Check valve includes upper check valve and lower check valve;Upper check valve is provided at upper opening, and lower check valve is provided at lower opening;The bottom of guide rod penetrates lower check valve, and top penetrates upper check valve, and when the inner cavity space of elastic bag changes, upper check valve slides up and down along guide rod.The sealing of pump head structure in the utility model is high, and durability and high temperature stability are strong.

Description

Technical Field

[0001] This utility model relates to the field of packaging technology, and more specifically to a fully sealed all-plastic pump head structure and a bottle having the pump head structure. Background Technology

[0002] Currently, with the improvement of living standards, various daily chemical products and toiletries have become necessities. Some of these products are packaged in manually operated pump bottles. Common manually operated pump bottles often use rubber gaskets or metal springs as sealing and rebound components. While this structure provides a certain degree of sealing, it still has significant shortcomings in long-term use. For example, the large difference in thermal expansion coefficients between the rubber gasket and the plastic parts makes them prone to deformation and misalignment after high and low temperature cycles, resulting in micro-leakage; traditional one-way valves lack a linkage positioning structure, making the valve plate prone to misalignment, and they cannot be recycled as a whole after use, which is not environmentally friendly.

[0003] Therefore, developing a fully sealed all-plastic pump head structure with high sealing performance and a bottle body with such pump head structure is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a fully sealed all-plastic pump head structure with high sealing performance and a bottle body having the pump head structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fully sealed all-plastic pump head structure, comprising:

[0007] An elastic bladder, wherein the top and bottom of the elastic bladder are respectively provided with an upper opening and a lower opening;

[0008] A one-way valve, comprising an upper one-way valve and a lower one-way valve; the upper opening is provided with an upper one-way valve, and the lower opening is provided with a lower one-way valve;

[0009] A guide rod is provided, with its bottom penetrating the lower one-way valve and its top penetrating the upper one-way valve. When the internal space of the elastic bladder changes, the upper one-way valve slides up and down along the guide rod.

[0010] The beneficial effects of adopting the above technical solution are that a three-dimensional interlocking sealing system is formed by the elastic bladder, upper / lower check valves, and guide rod, eliminating the need for rubber gaskets and metal springs and achieving complete plasticization; the guide rod not only slides and guides the upper check valve, but also positions the upper and lower valves coaxially, preventing valve plate misalignment and significantly improving sealing reliability, durability, and high-temperature stability.

[0011] Preferably, the top and bottom of the guide rod are respectively provided with an upper boss and a lower boss for limiting the upper and lower one-way valves, respectively. The upper boss is located at the top of the upper one-way valve, and the lower boss is located at the top of the lower one-way valve. When the elastic bladder is compressed, the top of the elastic bladder moves downward, and the lower step of the guide rod presses against the lower one-way valve, making the lower one-way valve and the shoulder sleeve fit tightly together, sealing the outlet. The upper one-way valve is released from the limitation of the upper boss. Under the action of the air pressure inside the elastic bladder and the slight interference at the contact point between the guide rod and the upper one-way valve, the upper one-way valve is opened better under the action of friction. When the elastic bladder rebounds: the top of the elastic bladder moves upward, the upper one-way valve closes, and fits tightly with the upper opening of the elastic bladder. Under the action of the air pressure inside the elastic bladder and the slight interference at the contact point between the guide rod and the lower one-way valve, the lower one-way valve is lifted under the action of friction, thus opening the lower one-way valve better.

[0012] Preferably, the bottom of the elastic bladder is provided with a shoulder sleeve, the middle of the shoulder sleeve is provided with a liquid outlet, the lower one-way valve is placed at the liquid outlet, and the lower opening of the elastic bladder is sealed to the shoulder sleeve.

[0013] Preferably, an annular insertion groove is provided at the connection between the shoulder sleeve and the elastic bladder, and the opening wall of the lower opening of the elastic bladder is inserted into the insertion groove.

[0014] A bottle body with a fully sealed all-plastic pump head structure, comprising:

[0015] The pump head structure is located at the bottle opening of the bottle body;

[0016] A water tap cover is placed on top of the elastic bladder, and the liquid channel of the water tap cover is connected to the upper one-way valve; the side wall of the water tap cover contacts the inner side wall of the shoulder sleeve and moves up and down along the inner side wall of the shoulder sleeve.

[0017] The piston is located at the bottom of the inner cavity of the bottle body, and an air inlet is provided at the bottom of the bottle body.

[0018] Preferably, the shoulder sleeve is detachably connected to the bottle mouth of the bottle body, and a limiting ring is provided on the outer side wall of the shoulder sleeve, with the limiting ring positioned at the top edge of the bottle mouth.

[0019] Preferably, the top of the elastic bladder is provided with a limiting groove, and the bottom of the liquid channel of the water nozzle cover is inserted into the limiting groove; the upper opening and the upper one-way valve are placed at the bottom of the limiting groove.

[0020] Preferably, a bottle cap is attached to the top of the bottle body.

[0021] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a completely sealed all-plastic pump head structure and a bottle body having the pump head structure, the advantages of which are:

[0022] (1) The elastic bladder, upper and lower one-way valves and guide rod achieve dynamic pressure balance, and maintain complete sealing in the three states of pressing, rebounding and static, preventing leakage and backflow.

[0023] (2) All components are made of plastic, with a consistent coefficient of thermal expansion, making them less prone to leakage; at the same time, the whole is made of a single material, making it easy to recycle after use and more environmentally friendly.

[0024] (3) The bottle body and shoulder sleeve are connected by a threaded method. After use, the bottle body with the filled material is replaced on the shoulder sleeve, which can be replaced and used, reducing the cost of use, reducing the use of plastic, and making it more environmentally friendly. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 The attached figure is a structural schematic diagram of the bottle body provided by this utility model;

[0027] Figure 2 The attached figure is an exploded view of the bottle body provided by this utility model;

[0028] Figure 3 The attached figure is an internal sectional view of the bottle body in its initial state provided by this utility model;

[0029] Figure 4 The attached figure is an internal cross-sectional view of the elastic capsule provided by this utility model in its first compressed state;

[0030] Figure 5 The attached figure is an internal sectional view of the elastic capsule provided by this utility model when it first returns to its original shape;

[0031] Figure 6 The attached figure is an internal cross-sectional view of the elastic bladder provided by this utility model in the second compressed state.

[0032] In the figure,

[0033] 1-Elastic capsule;

[0034] 11-Top opening; 12-Limiting groove;

[0035] 2-Upper check valve; 3-Lower check valve; 4-Guide rod;

[0036] 5-Shoulder pads;

[0037] 51-Liquid outlet; 52-Insertion groove; 53-Limiting ring;

[0038] 6-Bottle body;

[0039] 7-Water tap cover;

[0040] 71-Liquid Channel;

[0041] 8-Piston; 9-Bottle cap. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] This utility model discloses a completely sealed all-plastic pump head structure, including:

[0044] The elastic bladder 1 has an upper opening 11 at its top and a lower opening at its bottom.

[0045] The check valve includes an upper check valve 2 and a lower check valve 3; the upper check valve 2 is provided at the upper opening 11, and the lower check valve 3 is provided at the lower opening.

[0046] A guide rod 4 passes through a lower one-way valve 3 at its bottom and an upper one-way valve 2 at its top. When the internal space of the elastic bladder 1 changes, the upper one-way valve 2 slides up and down along the guide rod 4. When the elastic bladder 1 is compressed, the air pressure inside increases, the upper one-way valve 2 opens, and the lower one-way valve 3 closes, allowing the gas inside the elastic bladder 1 to escape through the upper one-way valve 2. When the elastic bladder 1 is released, the air pressure inside decreases, the upper one-way valve 2 closes, and the lower one-way valve 3 opens, allowing the liquid in the bottle 6 to enter the elastic bladder 1 through the lower one-way valve 3. The sealing and opening of the elastic bladder 1 via the upper one-way valve 2 and the lower one-way valve 3 improves the reliability, durability, and high-temperature stability of the seal. Simultaneously, the upper one-way valve 2 and the lower one-way valve 3 are connected by the guide rod 4, which limits the vertical movement of the elastic bladder 1, preventing deviation from its intended position. Through the synergistic action of the three-dimensional interlocking one-way valves, the elastic bladder 1, and the guide rod 4, dynamic pressure balance is achieved. Figure 3-6 The yellow part represents gas, represented by the letter E, and the red part represents liquid, represented by the letter F.

[0047] To further optimize the above technical solution, the top and bottom of the guide rod 4 are respectively provided with an upper boss 41 and a lower boss 42 for limiting the upper check valve 2 and the lower check valve 3. The upper boss 41 is located at the top of the upper check valve, and the lower boss is located at the top of the lower check valve.

[0048] To further optimize the above technical solution, a shoulder sleeve 5 is provided at the bottom of the elastic bladder 1, and a liquid outlet is provided in the middle of the shoulder sleeve 5. A lower one-way valve 3 is placed at the liquid outlet 51, and the lower opening of the elastic bladder 1 is sealed to the shoulder sleeve 5. The shoulder sleeve 5 can isolate the liquid inside the bottle body 6.

[0049] To further optimize the above technical solution, an annular insertion groove 52 is provided at the connection between the shoulder sleeve 5 and the elastic bladder 1, and the opening wall of the lower opening of the elastic bladder 1 is inserted into the insertion groove 52. The connection between the shoulder sleeve 5 and the elastic bladder 1 ensures that the liquid in the bottle body 6 enters the elastic bladder 1 directly after passing through the lower one-way valve 3.

[0050] A bottle body with a fully sealed all-plastic pump head structure, comprising:

[0051] Bottle body 6, the pump head structure is set at the bottle mouth of bottle body 6;

[0052] Water nozzle cover 7 is placed on top of elastic bladder 1, and the liquid channel 71 of water nozzle cover 7 is connected to the upper one-way valve 2; the side wall of water nozzle cover 7 contacts the inner side wall of shoulder sleeve 5 and moves up and down along the inner side wall of shoulder sleeve 5.

[0053] A piston 8 is provided at the bottom of the inner cavity of the bottle body 6, and an air inlet 61 is provided at the bottom of the bottle body 6. After the liquid in the bottle body 6 enters the elastic bladder 1, the pressure in the bottle body 6 decreases, the piston 8 moves upward, and air enters the bottle body 6 through the air inlet 61, and the air entering is located below the piston 8.

[0054] To further optimize the above technical solution, the shoulder sleeve 3 is detachably connected to the bottle mouth of the bottle body 6. A limiting ring 53 is provided on the outer wall of the shoulder sleeve 5, and the limiting ring 53 is located at the top edge of the bottle mouth. The shoulder sleeve 3 is threadedly connected to the bottle body 6, so that the bottle body 6 can be easily removed and replaced with a new bottle body 6 containing liquid after the liquid in the bottle is used up.

[0055] To further optimize the above technical solution, a limiting groove 12 is provided at the top of the elastic bladder 1, and the bottom of the liquid channel 71 of the water nozzle cover 7 is inserted into the limiting groove 12; the upper opening 11 and the upper one-way valve 2 are placed at the bottom of the limiting groove 12. The limiting groove 12 can limit the water nozzle cover 7 to ensure the accuracy of liquid dispensing by pressing.

[0056] To further optimize the above technical solution, a bottle cap 9 is attached to the top of the bottle body 6.

[0057] Work process:

[0058] Initial state ( Figure 3 )

[0059] The elastic bladder 1 is in a naturally extended state; both the upper one-way valve 2 and the lower one-way valve 3 are closed; the piston 8 inside the bottle body 6 is located at the bottom, forming a closed space above the liquid surface inside the bottle.

[0060] First press ( Figure 4 )

[0061] Press down on the water nozzle cover 7 → the elastic bladder 1 is compressed → the internal air pressure increases → the upper one-way valve 2 moves up along the guide rod 4 and opens, while the lower one-way valve 3 remains closed → the air inside the bladder is discharged through the liquid channel 71 of the water nozzle cover 7.

[0062] First rebound ( Figure 5 )

[0063] Release your hand, and the elastic bladder 1 will regain its elasticity → negative pressure will be formed in the inner cavity → the upper one-way valve 2 will close and the lower one-way valve 3 will open → the liquid in the bottle will enter the elastic bladder 1 through the outlet 51 and the lower one-way valve 3 under the action of negative pressure and atmospheric pressure; at the same time, the air outside the bottle will enter the bottle body 6 through the air inlet 61 at the bottom of the bottle, pushing the piston 8 to move upward to compensate for the liquid volume.

[0064] static state ( Figure 5 )

[0065] The elastic bladder 1 returns to its natural length, both the upper and lower one-way valves are closed, and the liquid is completely sealed inside the elastic bladder 1, with no backflow and no leakage.

[0066] The second press dispenses the liquid. Figure 6 )

[0067] Press the water nozzle cap 7 again → the elastic bladder 1 is compressed → the upper one-way valve 2 opens and the lower one-way valve 3 closes → the liquid in the bladder is quantitatively squeezed out through the liquid channel 71; after releasing your hand, repeat the above steps to achieve a continuous, stable and completely sealed pumping cycle.

[0068] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0069] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fully sealed all-plastic pump head structure, characterized in that, include: An elastic bladder, wherein the top and bottom of the elastic bladder are respectively provided with an upper opening and a lower opening; A one-way valve, comprising an upper one-way valve and a lower one-way valve; the upper opening is provided with an upper one-way valve, and the lower opening is provided with a lower one-way valve; A guide rod is provided, with its bottom penetrating the lower one-way valve and its top penetrating the upper one-way valve. When the internal space of the elastic bladder changes, the upper one-way valve slides up and down along the guide rod.

2. The fully sealed all-plastic pump head structure according to claim 1, characterized in that, The guide rod is provided with an upper boss and a lower boss at its top and bottom, respectively, for limiting the upper one-way valve and the lower one-way valve. The upper boss is located at the top of the upper one-way valve, and the lower boss is located at the top of the lower one-way valve.

3. The fully sealed all-plastic pump head structure according to claim 1, characterized in that, The elastic bladder has a shoulder sleeve at its bottom, and a liquid outlet is provided in the middle of the shoulder sleeve. The lower one-way valve is located at the liquid outlet, and the lower opening of the elastic bladder is sealed to the shoulder sleeve.

4. The fully sealed all-plastic pump head structure according to claim 3, characterized in that, An annular insertion groove is provided at the connection between the shoulder sleeve and the elastic bladder, and the opening wall of the lower opening of the elastic bladder is inserted into the insertion groove.

5. A bottle having a fully sealed all-plastic pump head structure as described in any one of claims 1-4, characterized in that, include: The pump head structure is located at the bottle opening of the bottle body; A water tap cover is placed on top of the elastic bladder, and the liquid channel of the water tap cover is connected to the upper one-way valve; the side wall of the water tap cover contacts the inner side wall of the shoulder sleeve and moves up and down along the inner side wall of the shoulder sleeve. The piston is located at the bottom of the inner cavity of the bottle body, and an air inlet is provided at the bottom of the bottle body.

6. A bottle body with a fully sealed all-plastic pump head structure according to claim 5, characterized in that, The shoulder sleeve is detachably connected to the bottle mouth of the bottle body, and a limiting ring is provided on the outer side wall of the shoulder sleeve, with the limiting ring positioned at the top edge of the bottle mouth.

7. A bottle body with a fully sealed all-plastic pump head structure according to claim 6, characterized in that, The top of the elastic bladder is provided with a limiting groove, and the bottom of the liquid channel of the water nozzle cover is inserted into the limiting groove; the upper opening and the upper one-way valve are placed at the bottom of the limiting groove.

8. A bottle body with a fully sealed all-plastic pump head structure according to claim 6, characterized in that, The bottle body is fitted with a cap at the top.

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