Pump body structure of emulsion pump
By setting a grooved structure on the pump body and annular gasket to form an air intake channel, the problem of gas pressure difference balance under different gas pressures in the emulsion pump is solved, realizing gas exchange inside and outside the bottle, avoiding bottle collapse or expansion, improving the smoothness of liquid dispensing and the rebound speed of the pump head, and the structure is simple and low cost.
Patent Information
- Application Number
- CN202520597898.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-31
AI Technical Summary
Existing emulsion pumps cannot effectively balance the pressure difference between the inside and outside of the bottle at different altitudes and air pressures, resulting in problems such as bulging or collapsing bottles, difficulty in dispensing liquid, and slow pump head rebound.
A grooved structure is set on the pump body and the annular gasket to form an air intake channel. The gas pressure difference is used to realize the exchange of gases inside and outside the bottle, balance the gas pressure difference, and avoid the bottle collapsing or swelling.
It effectively balances the pressure difference between the inside and outside of the bottle, solving the problem of collapsed or swollen bottles, improving the smoothness of liquid dispensing and the rebound speed of the pump head, and has a simple structure, low cost, and prevents leakage.
Smart Images
Figure CN223822393U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to daily chemical packaging container technical field, concretely relates to a pump body structure of emulsion pump, and is suitable for the pump head packaging of daily chemical washing, cosmetics, skin care products and other liquid products. BACKGROUND
[0002] The emulsion pump is a kind of liquid distributor using atmospheric balance principle, and the liquid content in bottle is pumped out of bottle body by pressing, and the atmosphere outside is replenished into bottle, and it is widely used in the packaging of various emulsion products such as cleaning agent, cosmetics etc.
[0003] The conventional emulsion pump is often composed of airtight structure of press head, main column, auxiliary column, gasket, lock cover, pump plug, spring, pump body, glass ball, suction tube and other accessories.When the initial assembly of emulsion pump and bottle is completed and has not been used, the cooperation of each component is in a sealed state, for filling products in different altitudes and air pressure, the sealing structure of existing pump head cannot effectively discharge or supplement the gas in bottle when transporting and selling, and the different pressure difference between inside and outside of bottle body leads to the problems of bottle collapse or bottle expansion, unattractive appearance, liquid discharge difficulty, slow pump head rebound and other problems. UTILITARIAN CONTENT
[0004] The utility model provides a kind of emulsion pump pump body structure for the above-mentioned technical defects of prior art, air inlet channel is formed by the groove structure on pump body and annular gasket, gas inside and outside pump head is exchanged with the gas in bottle under the action of pressure difference, to balance the air pressure difference between inside and outside of bottle body, avoid the problems of bottle collapse or bottle expansion.
[0005] To solve the above technical problems, the utility model provides a kind of emulsion pump pump body structure, including pump body, screw cap of being sleeved on the upper end of pump body and lock cover of being covered on the upper end of pump body and being located above screw cap, screw cap is used to be connected with the bottle mouth thread on the bottle of matched bottle, to install the emulsion pump on bottle and use, the outer periphery of the upper end of pump body is provided with a boss being located in the inboard of screw cap and being annular, the lower surface of the boss is concavely provided with a ring groove and at least one gas guide groove for communicating ring groove and the outer periphery of boss, the outer periphery of the upper end of pump body is sleeved with annular gasket that is abutted with the lower surface of the boss, and the inner periphery between the annular gasket and the pump body is provided with air inlet gap, and the surface of the annular gasket is concavely provided with a plurality of recesses that are communicated with air inlet gap and ring groove.
[0006] Further, the depth of the ring groove and the gas guide groove is 0.1-0.2mm, and the width is 0.1-0.5mm.
[0007] Further, the recess is semicircular hole, and the diameter of the recess is 0.5-1mm.
[0008] Furthermore, the groove is a straight groove extending radially along the annular gasket.
[0009] Furthermore, the outer circumference of the pump body is circular, and the inner circumference of the annular gasket is hexagonal, octagonal, rectangular, or trapezoidal, so that an air intake gap is formed between the pump body and the annular gasket.
[0010] Furthermore, the annular gasket is made of foamed PE or silicone.
[0011] Furthermore, the annular groove corresponds to the middle of the external bottle mouth end face, and the width of the annular groove is smaller than the width of the bottle mouth end face.
[0012] Furthermore, the emulsion pump body structure also includes a pusher with a dispensing nozzle, a connecting post protruding from the lower end of the pusher, a dispensing channel communicating with the dispensing nozzle in the middle of the connecting post, and a threaded hole in the middle of the locking cap that is threadedly connected to the connecting post.
[0013] Furthermore, the emulsion pump body structure also includes:
[0014] A conduit, the upper end of which is fitted onto the lower end of the liquid outlet channel and communicates with the liquid outlet nozzle, and the conduit is disposed within the cavity;
[0015] The extrusion column has its upper end fitted onto the lower end of the conduit, and the side wall of the extrusion column is provided with several inflow holes that communicate with the conduit.
[0016] A spring is provided between the extrusion column and the pump body to spring the extrusion column, the guide tube, and the pusher upward;
[0017] A piston is fitted around the periphery of the extrusion column and located between the conduit and the extrusion column, with the periphery of the piston abutting against the inner wall of the pump body;
[0018] A marble is movably disposed within the liquid inlet hole, and a limiting ring protrudes from the liquid inlet hole to support the marble.
[0019] Furthermore, the emulsion pump body structure also includes a suction tube fitted onto the lower end of the pump body and communicating with the liquid inlet; the upper outer periphery of the pump body is also provided with at least one air hole communicating with the cavity.
[0020] This utility model has the following beneficial effects:
[0021] This utility model of an emulsion pump, after the threaded cap is threadedly connected to the bottle neck, will have a thread engagement gap due to production and assembly errors. This gap allows air to flow between the inside and outside of the threaded cap. An air intake channel is formed by connecting the annular groove and air guide groove on the boss with the groove on the annular gasket. After the emulsion pump is assembled on the bottle, air inside and outside the threaded cap can flow through this air intake channel, allowing the gas inside and outside the pump head to exchange with the gas inside the bottle under the action of pressure difference. This balances the pressure difference between the inside and outside of the bottle, preventing bottle collapse or expansion. It also solves problems such as unsightly products, difficulty in dispensing liquid, and slow pump head rebound. Moreover, the overall structure is simple. The purpose of balancing the internal and external pressure difference can be achieved simply by machining the interconnected groove structure on the boss and annular gasket of the pump body. No additional parts are required, resulting in low cost.
[0022] Secondly, the depth of the annular groove and the air guide groove is only 0.1 to 0.2 mm. The depth of this channel is less than the height of the liquid column formed by the surface tension of the liquid contents. When viscous liquid flows through this channel, it can form a liquid seal structure, which can prevent liquid leakage even when the bottle is upside down, thus avoiding leakage problems caused by the presence of the air guide groove.
[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the invention. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the emulsion pump body structure in the embodiment;
[0026] Figure 2 This is a side sectional view of the emulsion pump body structure in the embodiment;
[0027] Figure 3 This is a front sectional view of the emulsion pump body structure in the embodiment;
[0028] Figure 4 for Figure 3 Enlarged view of point A in the middle;
[0029] Figure 5 This is a schematic diagram of the pump body in the embodiment;
[0030] Figure 6This is a schematic diagram of the annular gasket in the embodiment;
[0031] Figure 7 This is a schematic diagram of an annular gasket in another different embodiment;
[0032] Figure 8 This is a schematic diagram of the lock cover in the embodiment;
[0033] Figure 9 This is a schematic diagram of the pressing head in the embodiment. Detailed Implementation
[0034] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0035] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.
[0036] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.
[0037] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0038] Example
[0039] like Figures 1-9 As shown in the figure, the emulsion pump body structure that can balance the internal and external air pressure difference in this embodiment includes a pusher 1 with a dispensing nozzle 11, a pump body 2 with an internal cavity 20, a threaded cap 3, a locking cap 4, a conduit 5, a squeezing column 6, a spring 7, a piston 8, a ball bearing 9, and a suction tube 21.
[0040] The pump body 2 has a threaded cap 3 fitted onto its upper end for threaded connection to the bottle neck, allowing the emulsion pump to be installed on the bottle. A locking cap 4 is fitted onto the upper end of the pump body 2 and positioned above the threaded cap 3. The lower end of the pump head 1 has a connecting post 12 with a protrusion in the middle. The connecting post 12 has a liquid outlet channel 13 in the middle that communicates with the liquid outlet 11. The locking cap 4 has a threaded hole 41 in the middle that is threaded to the connecting post 12, so that the pump head 1 is assembled and fixed on the locking cap 4 during factory assembly. The lower end of the pump body 2 has an inlet hole 22 in the middle that communicates with the cavity 20. This inlet hole 22 is used to introduce liquid matrix (such as laundry detergent or other cleaning products) into the cavity inside the pump body.
[0041] In this embodiment, as Figures 3-6 As shown, the upper outer periphery of the pump body 2 has a protruding, annular boss 24 located inside the threaded cover 3. The lower surface of the boss 24 has a recessed annular groove 241 and at least one air guide groove 242 for connecting the annular groove 241 and the outer periphery of the boss 24. The upper outer periphery of the pump body 2 is fitted with an annular gasket 25 that abuts against the lower surface of the boss 24. An air intake gap 250 is provided between the inner periphery of the annular gasket 25 and the pump body 2. The surface of the annular gasket 25 has a plurality of recesses 251 that connect the air intake gap 250 and the annular groove 241. The air guide groove 242, the annular groove 241 and the recesses 251 are connected to form an air intake channel. It can be understood that when there are multiple air guide grooves, the air guide grooves are distributed in a ring array.
[0042] In the above description, after the threaded cap is connected to the bottle neck by threads, due to production and assembly errors, a thread engagement gap will exist between them. This thread engagement gap allows air to flow between the inside and outside of the threaded cap. Because the air intake channel connects the inner and outer circumferences of the annular gasket, it also connects with the thread engagement gap. Thus, air inside and outside the bottle can flow between the air intake channel and the thread engagement gap in sequence. When the pressure inside the bottle is low, under the action of the pressure difference between the gas inside and outside the pump head, outside air flows through the thread engagement gap and the air intake channel in sequence. The gas enters the bottle through the inlet channel, balancing the pressure inside and outside the bottle and facilitating gas exchange. This prevents bottle collapse or expansion, and addresses issues such as unsightly products, difficulty in dispensing liquid, and slow pump head rebound. When the pressure inside the bottle is high, the pressure difference between the inside and outside of the pump head forces the air inside the bottle to exit sequentially through the inlet channel and the threaded mesh, balancing the pressure inside and outside the bottle. Test data shows that this method can balance the pressure difference between the inside and outside of the bottle within half an hour.
[0043] In one embodiment, the depth of both the annular groove 241 and the air guide groove 242 is 0.1–0.2 mm, and the width is 0.1–0.5 mm, preferably 0.1 mm. This creates an air intake channel with a depth of 0.1–0.2 mm between the annular gasket and the boss through these two groove-like structures. The depth of this channel is less than the height of the liquid column formed by the surface tension of the contents. When viscous liquid flows through this channel, a liquid seal structure is formed, preventing liquid leakage even when the bottle is inverted, thus avoiding leakage problems caused by the presence of the air guide groove. Test data shows that this solution can ensure that the liquid inside the bottle remains sealed even when inverted for 24 hours without leakage, and can withstand a 5 kg pressure applied to the bottle body without the liquid flowing out from the two grooves.
[0044] Understandably, in another practical case, the depth of the gas guide channel can also be adjusted according to the viscosity of the liquid inside the bottle, as long as its depth is less than the height of the liquid column formed by the surface tension of the contents.
[0045] In one embodiment, the groove 251 is a semi-circular hole, and the diameter of the groove 251 is 0.5 to 1 mm, that is, the depth of the groove is 0.25 to 0.5 mm. After the threaded cap is assembled with the bottle, the bottle mouth will apply pressure to the annular gasket, thereby causing the groove to deform upward at the position corresponding to the bottle mouth, so that the depth of the groove after deformation is controlled to be 0.1 to 0.2 mm.
[0046] In one embodiment, the groove 251 is a straight groove extending radially along the annular gasket, which facilitates manufacturing. It is understood that, firstly, to achieve a better sealing effect, the groove 251 may only be a half-length groove connecting the air intake gap and the annular groove, with its outer end not connecting to the outer periphery of the annular gasket (e.g., ...). Figure 6 (as shown); secondly, in another embodiment, considering that the depth of the groove after pressure deformation is small and there will be no leakage problem, the groove 251 can also be a long groove that directly connects the inner and outer circumferences of the annular gasket (as shown). Figure 7 (As shown).
[0047] Understandably, in another practical case, the number and location of the grooves and air guides can also be adjusted according to the viscosity of the liquid inside the bottle. Generally speaking, the higher the viscosity of the liquid inside the bottle, the more grooves and air guides can be set.
[0048] In one embodiment, such as Figures 5-6As shown, the outer circumference of the pump body 2 is circular, and the inner circumference of the annular gasket 25 is hexagonal, octagonal, rectangular or trapezoidal. An air intake gap 250 is formed between the corner of the polygon and the circular outer wall of the pump body. It can be understood that the diameter of the inscribed circle of the annular gasket 25 is slightly smaller than or equal to the outer diameter of the upper end of the pump body, and is used to fix the annular gasket after assembly.
[0049] In one embodiment, the annular groove 241 corresponds to the middle of the external bottle mouth end face, and the width of the annular groove 241 is smaller than the width of the bottle mouth end face. Thus, when the annular gasket is compressed, the part corresponding to the bottle mouth undergoes elastic deformation, reducing the opening depth between the groove and the annular groove. This further avoids leakage problems without affecting air intake.
[0050] In one embodiment, such as Figures 2-5 As shown, the upper outer periphery of the pump body 2 is provided with at least one air hole 23 that communicates with the cavity 20. The air hole 23 is used to connect the internal space of the bottle and the cavity 20 inside the pump body 2, so that when the pusher is unlocked and pressed for use, the gas exchange between the inside and outside of the bottle and the internal and external pressure can be balanced through the air hole.
[0051] In one embodiment, such as Figures 1-2 As shown, the straw 21 is fitted onto the lower end of the pump body 2 and communicates with the inlet hole 22 for drawing liquid matrix from the bottle. The upper end of the conduit 5 is fitted onto the lower end of the outlet channel 13 and communicates with the outlet nozzle 11, and the conduit 5 is located within the cavity 20. The upper end of the squeezing column 6 is fitted onto the lower end of the conduit 5, and several inflow holes 61 communicating with the conduit 5 are provided through the side wall of the squeezing column 6. The spring 7 is located between the squeezing column 6 and the lower end of the pump body 2 to spring the squeezing column 6, the conduit 5, and the push head 1 upwards, realizing the pressing operation after the push head is unlocked. The piston 8 is fitted around the outer periphery of the extrusion column 6 and is located between the conduit 5 and the extrusion column 6, and the outer periphery of the piston 8 abuts against the inner wall of the pump body 2; the ball 9 is movably disposed in the liquid inlet hole 22, and a limiting ring 26 is provided in the liquid inlet hole 22 to support the ball 9 upward. The purpose of sealing the liquid inlet hole is achieved by the cooperation of the ball 9 and the limiting ring 26; after the emulsion pump is assembled with the bottle body, the lower end of the pump body is inserted into the bottle body, while the threaded cap, locking cap and pusher are placed on the outside of the bottle, and the air hole 23 is located inside the threaded cap 3 and is placed inside the bottle mouth after assembly.
[0052] When using this emulsion pump: First, rotate the pusher to disengage the threaded connection between the pusher and the locking cap, thus unlocking the pusher. The pusher then rises under the action of a spring. Pressing the pusher down compresses the spring, and releasing the pusher causes it to spring back up, preparing for the next pressing operation. As the pusher descends, it drives the guide tube, extrusion column, and piston downwards simultaneously. During the piston's descent, it compresses the lower cavity space and uses a ball bearing to seal the opening of the limiting ring, preventing the liquid matrix entering the cavity from falling back out. This allows the liquid matrix in the cavity to flow into the guide tube when the piston and guide tube are pressed down, forcing the liquid matrix in the lower space into the guide tube before flowing out from the outlet. When the pusher is released and the pusher springs back up, the pressure in the lower space of the piston decreases due to the reduction of contents and the increase in space, resulting in a suction force that propels the liquid matrix from the bottle upwards along the suction tube into the pump's cavity.
[0053] In one embodiment, the annular gasket is made of foamed PE or silicone, giving it good elastic deformation capability.
[0054] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model; therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A pump body structure for an emulsion pump, comprising a pump body, a threaded cap fitted onto the upper end of the pump body, and a locking cap covering the upper end of the pump body and located above the threaded cap, wherein the pump body has an internal cavity, and the lower end of the pump body has an inlet hole communicating with the cavity, characterized in that, The upper outer periphery of the pump body has a raised, annular boss located inside the threaded cover. The lower surface of the boss has a recessed annular groove and at least one air guide groove for connecting the annular groove and the outer periphery of the boss. The upper outer periphery of the pump body is fitted with an annular gasket that abuts against the lower surface of the boss. An air intake gap is provided between the inner periphery of the annular gasket and the pump body. The surface of the annular gasket has a plurality of recesses that connect the air intake gap and the annular groove.
2. The emulsion pump body structure according to claim 1, characterized in that, The depth of both the annular groove and the air guide groove is 0.1–0.2 mm, and the width is 0.1–0.5 mm.
3. The emulsion pump body structure according to claim 2, characterized in that, The groove is a semi-circular hole, and the diameter of the groove is 0.5 to 1 mm.
4. The emulsion pump body structure according to claim 3, characterized in that, The groove is a straight groove extending radially along the annular gasket.
5. The emulsion pump body structure according to claim 1, characterized in that, The outer circumference of the pump body is circular, and the inner circumference of the annular gasket is hexagonal, octagonal, rectangular, or trapezoidal, so that an air intake gap is formed between the pump body and the annular gasket.
6. The emulsion pump body structure according to claim 1, characterized in that, The annular gasket is made of foamed PE or silicone.
7. The emulsion pump body structure according to claim 1, characterized in that, The annular groove corresponds to the middle of the external bottle mouth end face, and the width of the annular groove is smaller than the width of the bottle mouth end face.
8. The emulsion pump body structure according to any one of claims 1-7, characterized in that, It also includes a pusher with a liquid outlet, the lower end of the pusher having a connecting post protruding in the middle, the connecting post having a liquid outlet channel communicating with the liquid outlet in the middle, and the lock cover having a threaded hole in the middle that is threadedly connected to the connecting post.
9. The emulsion pump body structure according to claim 8, characterized in that, Also includes: A conduit, the upper end of which is fitted onto the lower end of the liquid outlet channel and communicates with the liquid outlet nozzle, and the conduit is disposed within the cavity; The extrusion column has its upper end fitted onto the lower end of the conduit, and the side wall of the extrusion column is provided with several inflow holes that communicate with the conduit. A spring is provided between the extrusion column and the pump body to spring the extrusion column, the guide tube, and the pusher upward; A piston is fitted around the periphery of the extrusion column and located between the conduit and the extrusion column, with the periphery of the piston abutting against the inner wall of the pump body; A marble is movably disposed within the liquid inlet hole, and a limiting ring protrudes from the liquid inlet hole to support the marble.
10. The emulsion pump body structure according to claim 9, characterized in that, It also includes a suction tube fitted onto the lower end of the pump body and communicating with the liquid inlet; the upper outer periphery of the pump body is also provided with at least one air hole communicating with the cavity.