Emulsion pump structure capable of balancing internal and external air pressure difference
By setting an air guide groove on the pump body of the emulsion pump, the pressure difference between the inside and outside of the bottle is balanced, which solves the problems of bottle collapse or expansion, difficulty in liquid dispensing, and slow pump head rebound that occur under different air pressure environments. It achieves a simple and low-cost air pressure balance effect.
Patent Information
- Application Number
- CN202520597849.5
- 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 bottle collapse or swelling, difficulty in dispensing liquid, and slow pump head rebound.
An air guide groove is installed on the pump body of the emulsion pump. The air guide groove connects the inside and outside of the bottle, allowing the gas inside and outside the pump head to exchange gases under the action of pressure difference, thus balancing the gas pressure difference inside and outside the bottle.
It effectively avoids the problems of dented or bulging bottles, solves the problems of difficult liquid dispensing and slow pump head rebound, and also avoids liquid leakage. It has a simple structure and low cost.
Smart Images
Figure CN223822392U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of daily chemical packaging container technology, specifically to an emulsion pump structure with a balanced internal and external air pressure difference, suitable for pump head packaging of liquid products such as daily chemical detergents, cosmetics, and skin care products. Background Technology
[0002] An emulsion pump is a liquid dispenser that uses the principle of atmospheric balance to pump the liquid contents out of the bottle by pressing, while replenishing the bottle with outside air. It is widely used in the packaging of various emulsion products such as detergents and cosmetics.
[0003] Conventional emulsion pumps typically consist of an airtight structure comprised of components such as a pump head, main column, auxiliary column, gasket, locking cap, pump plug, spring, pump body, glass bulb, and straw. When the emulsion pump and bottle are initially assembled and not yet used, the components are in a sealed state. However, when filling products at varying altitudes and air pressures, the existing pump head's sealing structure cannot effectively expel or replenish gas inside the bottle during transportation and sales. The pressure difference between the inside and outside of the bottle causes problems such as bottle collapse or swelling, resulting in unsightly appearance, difficulty dispensing liquid, and slow pump head rebound. Utility Model Content
[0004] This invention addresses the aforementioned technical deficiencies by providing an emulsion pump structure that balances the internal and external pressure differences. A gas guide groove on the pump head connects the inside and outside of the bottle, allowing the gas inside and outside the pump head to exchange with the gas inside the bottle under the influence of the pressure difference. This balances the pressure difference between the inside and outside of the bottle, preventing problems such as bottle collapse or expansion.
[0005] In a first aspect, to solve the above-mentioned technical problems, this utility model provides an emulsion pump structure with a balanced internal and external air pressure difference, including a pump body, a threaded cap fitted on the upper end of the pump body, and a locking cap that covers the upper end of the pump body and is located above the threaded cap. The pump body has an internal cavity, and the lower end of the pump body has a liquid inlet hole communicating with the cavity. The upper end of the pump body has at least one air hole communicating with the cavity on its outer periphery. The upper end of the pump body has two raised abutments and a second abutment that are spaced apart vertically and engage with the locking cap. The first abutment has at least one first air guide groove, and the second abutment has at least one second air guide groove, so that an air inlet channel communicating with the air hole through the cavity is formed between the locking cap and the two air guide grooves.
[0006] Furthermore, the depth of both the first and second air guide grooves is 0.1–0.2 mm, and the width is 0.1–0.5 mm.
[0007] Furthermore, both the first and second air guide grooves are vertically arranged straight grooves.
[0008] Furthermore, both the first and second air guide grooves are trapezoidal grooves, with the top being smaller than the bottom.
[0009] Furthermore, both the first and second air guide grooves are concave arc-shaped grooves.
[0010] Furthermore, the first air guide groove and the second air guide groove are respectively located on both sides of the pump body, and an annular groove connecting the two air guide grooves is formed between the first annular platform and the second annular platform.
[0011] Furthermore, the inner circumference of the lock cover is recessed with two slots that respectively engage with the first annular platform and the second annular platform. A first gap communicating with the air intake channel is provided between the inner wall of the lock cover and the outer circumference of the pump body. A second gap communicating with the first gap is provided between the inner top surface of the lock cover and the top surface of the pump body. A connecting part that is inserted into the cavity is protruding in the middle of the inner side of the lock cover. A third gap communicating with the second gap is formed between the outer circumference of the connecting part and the inner circumference of the pump body.
[0012] Furthermore, the emulsion pump 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 connecting part that is threadedly connected to the connecting post.
[0013] Furthermore, the emulsion pump 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 structure also includes a suction tube fitted onto the lower end of the pump body and communicating with the inlet port.
[0020] Secondly, this utility model also discloses another emulsion pump structure with balanced internal and external air pressure difference, including a pump body, a threaded cap fitted on the upper end of the pump body, and a locking cap that covers the upper end of the pump body and is located above the threaded cap. The pump body has an internal cavity, and the lower end of the pump body has a liquid inlet hole communicating with the cavity in the middle. The upper end of the pump body has at least one air hole communicating with the cavity on its outer periphery. The outer periphery of the locking cap has a sleeve portion fitted onto the outer periphery of the pump body. The inner wall of the sleeve portion has at least one rib extending axially and abutting against the outer periphery of the pump body, so that a first gap communicating with the cavity is formed between the inner side of the sleeve portion and the outer periphery of the pump body. A second gap communicating with the first gap is formed between the inner top surface of the locking cap and the top surface of the pump body. A third gap communicating with the second gap is formed between the outer periphery of the connecting portion and the inner periphery of the pump body.
[0021] Furthermore, the inner side of the lock cover has a raised middle section with a connecting part that is inserted into the cavity, and the upper end of the pump body is inserted between the sleeve part and the connecting part; a second gap communicating with the first gap is provided between the inner top surface of the lock cover and the top surface of the pump body, and a third gap communicating with the second gap and the cavity is formed between the outer periphery of the connecting part and the inner periphery of the pump body.
[0022] Furthermore, the protrusion height of the rib is 0.1 to 0.2 mm; the upper outer periphery of the pump body is provided with two first and second annular platforms arranged at intervals, and the inner periphery of the sleeve is provided with two grooves that respectively engage with the first and second annular platforms.
[0023] Furthermore, both the first and second annular platforms have openings at positions corresponding to the protruding ribs for the ribs to pass through.
[0024] Furthermore, a vertically arranged rib is provided at the corresponding position in each of the two slots, so that the outer sides of the two ribs abut against the outer periphery of the first ring platform and the second ring platform, respectively.
[0025] Furthermore, the emulsion pump 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 connecting part that is threadedly connected to the connecting post.
[0026] Furthermore, the emulsion pump structure also includes:
[0027] 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;
[0028] 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.
[0029] A spring is provided between the extrusion column and the pump body to spring the extrusion column, the guide tube, and the pusher upward;
[0030] 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;
[0031] A marble is movably disposed within the liquid inlet hole, and a limiting ring protrudes from the liquid inlet hole to support the marble.
[0032] Furthermore, the emulsion pump structure also includes a suction tube fitted onto the lower end of the pump body and communicating with the inlet port.
[0033] This utility model has the following beneficial effects:
[0034] This utility model discloses an emulsion pump. By setting air guide grooves on the pump body, an air intake channel for internal and external gas flow is formed between the cap and the pump body after the cap is assembled with the pump body. Thus, after the emulsion pump is assembled onto the bottle, the air guide grooves on the pump body can connect the inside and outside of the bottle. Under the action of pressure difference, the gas inside and outside the pump head exchanges with the gas inside the bottle, thereby balancing the pressure difference between the inside and outside of the bottle and avoiding problems such as bottle collapse or bottle expansion. This solves problems such as unsightly products, difficulty in dispensing liquid, and slow pump head rebound. Moreover, the overall structure is simple. Only two air guide grooves need to be machined on the pump body to achieve the purpose of balancing the internal and external gas pressure difference. No additional parts are required, resulting in low cost.
[0035] Secondly, the depth of 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.
[0036] 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
[0037] 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.
[0038] Figure 1 This is a schematic diagram of the emulsion pump structure in the embodiment;
[0039] Figure 2 This is a side sectional view of the emulsion pump structure in the embodiment;
[0040] Figure 3 This is a front sectional view of the emulsion pump structure in the embodiment;
[0041] Figure 4 for Figure 3 Enlarged view of point A in the middle;
[0042] Figure 5 for Figure 3 Enlarged view of point B in the middle;
[0043] Figure 6 This is a schematic diagram of the pump body in the embodiment;
[0044] Figure 7 This is a schematic diagram of the back side of the pump body in the embodiment;
[0045] Figure 8 This is a schematic diagram of the lock cover in the embodiment;
[0046] Figure 9 This is a schematic diagram of the pressing head in the embodiment;
[0047] Figure 10 This is a front sectional view of the emulsion pump structure in Example 2;
[0048] Figure 11 for Figure 10 Enlarged view of point C in the middle;
[0049] Figure 12 This is a schematic diagram of the locking cover in Example 2;
[0050] Figure 13 This is a side sectional view of the lock cover in Example 2;
[0051] Figure 14 This is a schematic diagram of the pump body in Example 2;
[0052] Figure 15 This is a schematic diagram of another embodiment where the pump body has an opening;
[0053] Figure 16 This is a schematic diagram of another embodiment where only the two slots of the lock cover are provided with raised ribs. Detailed Implementation
[0054] 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.
[0055] 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.
[0056] 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.
[0057] 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.
[0058] Example 1
[0059] like Figure 1-9 As shown in the figure, the emulsion pump structure with balanced internal and external air pressure difference shown 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.
[0060] The screw cap 3 is fitted onto the upper end of the pump body 2 for threaded connection with the bottle mouth; the locking cap 4 is fitted onto the upper end of the pump body 2 and located above the screw cap 3; the lower end of the pump body 2 has a liquid inlet hole 22 communicating with the cavity 20, which is used to introduce liquid matrix (such as laundry detergent or other cleaning products) into the cavity inside the pump body; the upper end of the pump body 2 has at least one air hole 23 communicating with the cavity 20, which is used to connect the internal space of the bottle and the cavity 20 inside the pump body 2; the lower end of the pusher 1 has a protruding connecting post 12, and the middle of the connecting post 12 has a liquid outlet channel 13 communicating with the liquid outlet 11; the middle of the locking cap 4 has a threaded hole 41 that is threadedly connected to the connecting post 12, so that the pusher 1 is assembled and fixed on the locking cap 4 by the threaded connection structure during factory assembly.
[0061] In this embodiment, as Figure 3-6 As shown, the upper outer periphery of the pump body 2 has two raised first annular platforms 24 and second annular platforms 25 that are spaced apart vertically and engage with the locking cover 4. The first annular platform 24 has at least one vertically extending first air guide groove 26 that extends vertically through the first annular platform 24. The second annular platform 25 has at least one vertically extending second air guide groove 27 that extends vertically through the second annular platform 25. Thus, after the locking cover 4 is assembled with the pump body 2, the air inside and outside the pump body can be connected through the second air guide groove 27 and the first air guide groove 26 in sequence. That is, an air intake channel is formed between the locking cover 4 and the two air guide grooves, which communicates with the air hole through the cavity.
[0062] In the above description, when the emulsion pump is initially assembled with the bottle, the pump head and the cap are locked, and there is no liquid inside the pump body. When the pressure inside the bottle is low, the outside air passes through the second and first air guide grooves between the pump body and the cap and enters the cavity 20 under the action of the pressure difference, and then exits into the bottle through the air hole 23 on the pump body 2, so that the pressure inside and outside the bottle reaches equilibrium, completing the gas exchange and avoiding the problems of bottle collapse or expansion. This also solves the problems of unsightly products, difficulty in dispensing liquid, and slow pump head rebound. When the pressure inside the bottle is high, the air inside the bottle will exit through the air hole 23 on the pump body 2 and enter the cavity 20 under the action of the pressure difference, and then pass through the first and second air guide grooves before exiting to the outside, so that the pressure inside and outside the bottle reaches equilibrium. Test data shows that this scheme can achieve equilibrium of the pressure difference inside and outside the bottle within 0.5 hours.
[0063] In one embodiment, the depth of the first air guide groove 26 and the width of the second air guide groove 27 are both 0.1-0.2 mm and 0.1-0.5 mm, preferably 0.1 mm deep and 0.1 mm wide. This creates an air intake channel with a depth of 0.1-0.2 mm between the cap and the pump body. 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 leakage even when the bottle is inverted, thus avoiding leakage problems caused by the presence of the air guide grooves. 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 force applied to the bottle body without the liquid flowing out from the two air guide grooves.
[0064] 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.
[0065] In one embodiment, such as Figure 6-7 As shown, the first air guide groove 26 and the second air guide groove 27 are respectively located on both sides of the pump body 2. The opposite side design is not conducive to liquid leakage, further avoiding the problem of liquid leakage; and an annular groove 28 connecting the two air guide grooves is formed between the first annular platform 24 and the second annular platform 25.
[0066] Understandably, in another practical case, the number and location of the gas guide channels can also be adjusted according to the viscosity of the liquid in the bottle. Generally speaking, the higher the viscosity of the liquid in the bottle, the more gas guide channels can be set.
[0067] In one embodiment, such as Figure 6-7 As shown, both the first air guide groove 26 and the second air guide groove 27 are vertically arranged straight grooves, which facilitates processing and manufacturing.
[0068] In another different embodiment, both the first air guide groove and the second air guide groove are trapezoidal grooves that are smaller at the top and larger at the bottom.
[0069] In yet another embodiment, both the first and second air guide grooves are concave arc-shaped grooves.
[0070] In another embodiment, the vent 23 is located directly below the first air guide groove and / or the second air guide groove.
[0071] In one embodiment, such as Figure 3-5 As shown, the inner circumference of the lock cover 4 is recessed with two slots 42 that engage with the first annular platform 24 and the second annular platform 25 respectively. Both slots 42 are annular structures. A first gap 43 communicating with the air intake channel is provided between the inner wall of the lock cover 4 and the outer circumference of the pump body 2. A second gap 44 communicating with the first gap 43 is provided between the inner top surface of the lock cover 4 and the top surface of the pump body 2. A connecting part 45 that is inserted into the cavity 20 is protruding in the middle of the inner side of the lock cover 4. A threaded hole 41 that is threadedly connected to the connecting post 12 is provided in the middle of the connecting part 45. A third gap 46 communicating with the second gap 44 is formed between the outer circumference of the connecting part 45 and the inner circumference of the pump body 2. Thus, the two air guide grooves are connected to the outside and the cavity 20 respectively through the first gap 43, the second gap 44 and the third gap 46, which facilitates the air flow inside and outside the pump head.
[0072] In one embodiment, such as Figure 1-3As 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 29 is protruding 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 29; 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.
[0073] 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.
[0074] Example 2
[0075] like Figure 10-14As shown in the figure, this embodiment illustrates a liquid pump structure with a balanced internal and external air pressure difference, including a pump head 1 with a dispensing nozzle, 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 straw 21; wherein, the threaded cap 3 is fitted onto the upper end of the pump body 2 for threaded connection with the bottle mouth; the locking cap 4 is fitted onto the upper end of the pump body 2 and is located above the threaded cap 3; the lower end of the pump body 2 has an inlet hole 22 communicating with the cavity 20, which is used to introduce liquid matrix (such as laundry detergent or other cleaning products) into the cavity inside the pump body. (etc.), the upper outer periphery of the pump body 2 is provided with at least one air hole 23 communicating 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; the lower end of the pusher 1 has a connecting post 12 with a protrusion in the middle. The middle of the connecting post 12 is provided with a liquid outlet channel 13 communicating with the liquid outlet 11. The middle of the locking cap 4 is provided with a threaded hole 41 that is threadedly connected to the connecting post 12. Thus, during factory assembly, the pusher 1 is assembled and fixed on the locking cap 4 through the threaded connection structure. The overall structure of this embodiment is basically the same as that of embodiment 1. The difference lies in the ring structure at the upper end of the pump body and the structure of the locking cap, as detailed below:
[0076] like Figure 10-14 As shown, in this embodiment, no air guide groove is provided on the first annular platform 24 and the second annular platform 25 at the upper end of the pump body 2. A sleeve part 40 is provided on the outer periphery of the locking cover 4, which is fitted onto the outer periphery of the pump body 2. The inner periphery of the sleeve part 40 is recessed with two slots 42 that respectively engage with the first annular platform 24 and the second annular platform 25. At least one rib 401 is also provided on the inner wall of the sleeve part 40, which extends axially and abuts against the outer periphery of the pump body 2. The rib 401 extends vertically and penetrates the two slots 42, so that after the two sides of the rib of the sleeve part are pushed up, a first gap 43 is formed between the rib of the sleeve part and the outer periphery of the pump body 20, which communicates with the cavity 20.
[0077] In one embodiment, the inner side of the lock cover 4 has a protruding connecting part 45 that is inserted into the cavity 20. The connecting part 45 has a threaded hole 41 in the middle that is threaded to the connecting post 12. The upper end of the pump body 2 is inserted between the sleeve part 40 and the connecting part 45. The inner top surface of the lock cover 4 and the top surface of the pump body 2 are provided with a second gap 44 that communicates with the first gap 43. The outer periphery of the connecting part 45 and the inner periphery of the pump body 2 are formed with a third gap 46 that communicates with the second gap 44. Thus, the two air guide grooves are connected to the outside and the cavity 20 respectively through the first gap 43, the second gap 44 and the third gap 46, which facilitates the air flow inside and outside the pump head.
[0078] In one embodiment, the height of the protrusion rib 401 relative to the inner wall of the sleeve portion 40 is 0.1-0.2 mm, so that the maximum width of the first gap between the sleeve portion and the pump body is 0.1-0.2 mm. The width of this gap is less than the height of the liquid column formed by the surface tension of the contents. When a viscous liquid flows through this channel, a liquid seal structure can be formed, preventing liquid leakage even when the bottle is inverted, thus avoiding leakage problems due to the existence of the gap. Test data shows that this solution can ensure that the liquid inside the bottle will not leak even when inverted for 24 hours, and can withstand a 5 kg force applied to the bottle body without the liquid inside flowing out from the first gap.
[0079] In another embodiment, such as Figure 15 As shown, the first ring platform 24 and the second ring platform 25 each have an opening 402 at the position of the corresponding rib, so that the rib can pass through the two ring platforms and make the outer side of the rib abut against the outer peripheral surface of the pump body. This can form a positioning structure and further provide good sealing performance, so as to avoid the ring platform and the rib from being pushed up and causing the gap to be too large.
[0080] In yet another embodiment, such as Figure 16 As shown, a rib 401 can also be vertically set at the corresponding position in both slots, with a protrusion height of 0.1 to 0.2 mm, so that the rib can be engaged with the two ring platforms and push the locking cover outward to form the first gap.
[0081] 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 structure for an emulsion pump with balanced internal and external air pressure difference, 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; the pump body has an internal cavity, an inlet hole communicating with the cavity is provided at the middle of the lower end of the pump body, and at least one air hole communicating with the cavity is provided on the outer periphery of the upper end of the pump body, characterized in that, The upper outer periphery of the pump body has two raised first and second annular platforms that are spaced apart and engage with the locking cover. The first annular platform has at least one first air guide groove, and the second annular platform has at least one second air guide groove, so as to form an air intake channel that communicates with the air hole through the cavity between the locking cover and the two air guide grooves.
2. The emulsion pump structure according to claim 1, characterized in that, The depth of the first air guide groove and the second air guide groove are both 0.1 to 0.2 mm, and the width is both 0.1 to 0.5 mm; and the first air guide groove and the second air guide groove are both vertically arranged straight grooves or trapezoidal grooves that are smaller at the top and larger at the bottom.
3. The emulsion pump structure according to claim 1 or 2, characterized in that, The first air guide groove and the second air guide groove are respectively located on both sides of the pump body, and an annular groove connecting the two air guide grooves is formed between the first annular platform and the second annular platform.
4. The emulsion pump structure according to claim 3, characterized in that, The inner circumference of the lock cover is recessed with two slots that respectively engage with the first ring platform and the second ring platform. A first gap communicating with the air intake channel is provided between the inner wall of the lock cover and the outer circumference of the pump body. A second gap communicating with the first gap is provided between the inner top surface of the lock cover and the top surface of the pump body. A connecting part that is inserted into the cavity is protruding in the middle of the inner side of the lock cover. A third gap communicating with the second gap is formed between the outer circumference of the connecting part and the inner circumference of the pump body.
5. The emulsion pump structure according to claim 4, characterized in that, Also includes: A push-button with a liquid outlet nozzle, wherein a connecting post is provided in the middle of the lower end of the push-button, a liquid outlet channel communicating with the liquid outlet nozzle is provided in the middle of the connecting post, and a threaded hole is provided in the middle of the connecting part for threaded connection with the connecting post. 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. A suction tube is fitted onto the lower end of the pump body and communicates with the inlet port.
6. A structure for an emulsion pump with balanced internal and external air pressure difference, 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; the pump body has an internal cavity, an inlet hole communicating with the cavity is provided at the middle of the lower end of the pump body, and at least one air hole communicating with the cavity is provided on the outer periphery of the upper end of the pump body, characterized in that... The outer periphery of the locking cover is provided with a sleeve portion that fits onto the outer periphery of the pump body. The inner wall of the sleeve portion has at least one protruding rib that extends axially and abuts against the outer periphery of the pump body, so that a first gap is formed between the inner side of the sleeve portion and the outer periphery of the pump body, which communicates with the cavity.
7. The emulsion pump structure according to claim 6, characterized in that, The inner side of the lock cover has a raised middle section with a connecting part that is inserted into the cavity. The upper end of the pump body is inserted between the sleeve part and the connecting part. A second gap communicating with the first gap is provided between the inner top surface of the lock cover and the top surface of the pump body. A third gap communicating with the second gap and the cavity is formed between the outer periphery of the connecting part and the inner periphery of the pump body.
8. The emulsion pump structure according to claim 7, characterized in that, The protrusion height of the rib is 0.1 to 0.2 mm; the upper outer periphery of the pump body is provided with two first and second annular platforms arranged vertically and vertically, and the inner periphery of the sleeve is provided with two grooves that respectively engage with the first and second annular platforms.
9. The emulsion pump structure according to claim 8, characterized in that, Both the first and second annular platforms have openings at the positions corresponding to the protruding ribs, allowing the ribs to pass through.
10. The emulsion pump structure according to claim 8, characterized in that, Each of the two slots has a vertically arranged rib at a corresponding position, so that the outer sides of the two ribs abut against the outer periphery of the first ring platform and the second ring platform, respectively.