Emulsion pump

Abstract

The emulsion pump comprises a pressing head, a tooth socket and an air cylinder, the air cylinder comprises an air cylinder cover, a piston assembly is arranged on the lower portion of the pressing head, the piston assembly comprises a piston rod and a piston arranged on the piston rod, the emulsion pump further comprises a spring, and the spring is supported between the piston assembly and the air cylinder. A first thread is formed on the pressing head, a second thread is formed on the tooth socket, and the thread pitch of the first thread and the second thread is H1. The first thread can completely cross the ending position of the second thread. Wherein a first limiting structure is formed on the piston rod, a second limiting structure is formed on the inner wall of the air cylinder, and the first limiting structure can bounce upwards by a section of height H2 and H2lt relative to the second limiting structure; h1. According to the emulsion pump of the structure, the gap between the pressing head and the tooth socket can be reduced, the pressing head can be prevented from inclining, and the attractiveness of the appearance of the emulsion pump is improved.

Description

Technical Field

[0001] This application relates to the field of product packaging, and more specifically to an emulsion pump installed on a product container for dispensing product from the container. Background Technology

[0002] Emulsion pumps are widely used in product packaging for daily chemical products and other fields. They are installed on the bottle opening of containers that hold liquid or semi-liquid products for dispensing the product. With the development of online sales channels such as e-commerce, daily chemical products such as shampoo, shower gel, and conditioner are increasingly sold online and delivered to consumers through express delivery and other transportation channels.

[0003] A two-in-one design is used for the nozzle of a lotion pump used in e-commerce sales, with a cylinder head integrally molded onto the nozzle. This reduces the number of parts in the lotion pump, thereby lowering manufacturing costs and, consequently, packaging costs for products sold online. For this integrated nozzle and cylinder head lotion pump, both the pump head and nozzle are designed with interlocking internal and external threads. These threads are configured such that after the pump head is tightened onto the nozzle, it can continue to rotate relative to the nozzle in the tightening direction, causing the threads on the pump head to fall below the tail end of the threads on the nozzle. This allows the pump head to rotate to any desired position relative to the nozzle, thus accommodating various container shapes.

[0004] However, this type of emulsion pump also exhibits some problems during application. For example, after tightening the pressure head onto the die, the threads on the pressure head completely fall below the end of the threads on the die, at which point the gap between the pressure head and the die is essentially zero. However, as the pressure head continues to rotate in the tightening direction, the threads on the pressure head will pass the end of the threads on the die. At this point, under the action of the emulsion pump's spring, the pressure head will be bounced upwards, for example, by the height of one thread pitch, resulting in a larger gap between the pressure head and the die. Moreover, the distance the pressure head bounces upwards relative to the die will vary for different emulsion pumps, leading to inconsistent pump heights. When installing the emulsion pump onto the product container on the product filling production line, emulsion pumps with excessively large gaps between the pressure head and the die are prone to getting stuck on the production line, affecting the smooth operation of the entire production line.

[0005] Furthermore, because the forces between the threaded sleeve and the threaded indenter are not balanced, the indenter will tilt when it bounces upward under the force of the spring, resulting in uneven gaps between the indenter and the sleeve, which affects the aesthetic appearance of the emulsion pump.

[0006] Therefore, there is a need in the art to improve the structure of emulsion pumps to solve at least one of the technical problems caused by the pressure head bobbing upward relative to the dental brace. Utility Model Content

[0007] This application is made to address at least one technical problem existing in the prior art described above. The purpose of this application is to provide an improved emulsion pump that reduces the gap between the infuser head and the dental valve when the infuser head is tightened relative to the valve. Furthermore, by improving the structure of the emulsion pump, problems such as infuser head misalignment and uneven gap are also solved, improving the aesthetic appearance of the emulsion pump.

[0008] This application provides an emulsion pump, which includes a pressure head, a toothed sleeve, and a cylinder. The cylinder includes a cylinder head, and the toothed sleeve is fixedly connected to or integrally formed with the cylinder head. A piston assembly is provided at the lower part of the pressure head. The piston assembly includes a piston rod and a piston disposed on the piston rod. The emulsion pump also includes a spring supported between the piston assembly and the cylinder. A first thread is formed on the pressure head, and a second thread is formed on the toothed sleeve. The pitch of the first thread and the second thread is H1, and they are configured such that when the pressure head is tightened onto the toothed sleeve, the first thread can completely pass over the end position of the second thread. A first limiting structure is formed on the piston rod, and a second limiting structure is formed on the inner wall of the cylinder. When the pressure head is tightened onto the toothed sleeve, the first limiting structure and the second limiting structure cooperate with each other, and under the action of the spring, the first limiting structure can spring upward relative to the second limiting structure to a height of H2.

[0009] Specifically, the first thread can be an internal thread on the inner surface of the outer sleeve of the pressure head, and the second thread can be an external thread on the outer surface of the dental sleeve.

[0010] Through the cooperation between the first and second limiting structures, the emulsion pump of this application allows the distance by which the pressure head springs upward relative to the toothed sleeve under the action of the spring to be limited when the pressure head is in the locked position. This springing distance is limited to a distance less than the pitch of the first thread on the pressure head and the second thread on the toothed sleeve. This reduces the gap between the pressure head and the toothed sleeve and also prevents pressure head skew caused by the asymmetry of forces between the first and second threads, thus improving the aesthetic appearance of the emulsion pump.

[0011] Specifically, the first limiting structure is a limiting protrusion formed on one of the outer surface of the piston rod and the inner surface of the cylinder, and the second limiting structure is a limiting groove formed on the other of the outer surface of the piston rod and the inner surface of the cylinder.

[0012] More specifically, the limiting protrusion is formed as a limiting protrusion ring or as multiple discontinuous protrusions arranged circumferentially. ​

[0013] The diameters of the upper and lower ends of the limiting groove are set to be smaller than the diameter of the limiting protrusion, so that when the pressure head is threadedly connected to the tooth sleeve and in the locking state, the position of the limiting protrusion can be restricted within the range of the limiting groove.

[0014] In a more specific configuration, the piston assembly includes a sealing sleeve extending downward from the lower end of the piston rod, with a first limiting structure formed on the outer surface of the sealing sleeve. Correspondingly, a lower one-way valve is provided at the lower part of the cylinder, the lower one-way valve including a valve element and a valve seat sleeve, the valve seat sleeve being formed at the lower part of the cylinder and accommodating the valve element, with a second limiting structure formed on the inner surface of the valve seat sleeve.

[0015] Preferably, a sealing fit can be formed between the outer surface of the sealing sleeve and the inner surface of the valve seat sleeve. This improves the sealing performance of the emulsion pump, preventing product leakage, and also helps limit the height of the pressure head relative to the sleeve.

[0016] Preferably, the cylinder head and the cylinder head are formed as a single unit. This integrated cylinder head and cylinder head design simplifies the structure of the emulsion pump, making it suitable for e-commerce sales.

[0017] Preferably, the first and second threads are double-start threads. This double-start thread structure doubles the thread lead, thereby facilitating the rapid setting of the pressure head into or out of the locked state. Attached Figure Description

[0018] The accompanying drawings illustrate a non-limiting preferred embodiment of this application, and the features and advantages of this application become more apparent when viewed in conjunction with the drawings. Wherein:

[0019] Figure 1 This is a cross-sectional view of the emulsion pump of this application.

[0020] Figure 2 yes Figure 1 A cross-sectional view of the pump head of an emulsion pump.

[0021] Figure 3 yes Figure 1 A front view of the emulsion pump's brace.

[0022] Figure 4a yes Figure 1 A front view of the piston assembly of an emulsion pump.

[0023] Figure 4b This is a cross-sectional view of the piston assembly.

[0024] Figure 5 yes Figure 1 A cross-sectional view of the cylinder of an emulsion pump.

[0025] Figure 6This is another cross-sectional view of the emulsion pump of this application, showing the pressure head bouncing upwards a distance relative to the dental brace.

[0026] Figure 7a yes Figure 1 A magnified view of part I in the middle section.

[0027] Figure 7b yes Figure 6 A magnified view of a portion of section II.

[0028] (Symbol Explanation)

[0029] 1 emulsion pump

[0030] 10 pressure heads

[0031] 11 First Thread

[0032] 20 braces

[0033] 21 Second Thread

[0034] 30 cylinders

[0035] 31 cylinder head

[0036] 40 Piston Assembly

[0037] 41 Piston Rod

[0038] 42 Piston

[0039] 43 Sealing Sleeve

[0040] 44 limiting convex ring

[0041] 50-degree check valve

[0042] 51 valve

[0043] 52 Valve Seat Sleeve

[0044] 53 Limiting Groove

[0045] 60 spring Detailed Implementation

[0046] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. It should be understood that the embodiments shown in the drawings are merely preferred embodiments of this utility model and do not constitute a limitation on the scope of this utility model. Those skilled in the art can make various obvious modifications, variations, and equivalent substitutions to this utility model based on the embodiments shown in the drawings. Furthermore, without contradiction, the technical features in the different embodiments described below can be arbitrarily combined with each other, all of which fall within the protection scope of this utility model.

[0047] Figure 1A schematic cross-sectional view of the emulsion pump 1 of this application is shown. The emulsion pump 1 includes a pressure head 10, a toothed sleeve 20, a cylinder 30, and a piston assembly 40. As shown, the toothed sleeve 20 and the cylinder 30 are fixedly connected together, wherein the upper part of the cylinder 30 includes a cylinder head 31. Figure 5 The diagram shows that the cylinder head 31 of cylinder 30 is fixedly connected to the toothed sleeve 20 by a structure such as a retaining ring-slot. In emulsion pumps used in e-commerce, the cylinder head 31 can be integrally formed with the toothed sleeve 20.

[0048] A piston assembly 40 is provided at the lower part of the pressure head 10. The piston assembly 40 includes a piston rod 41 and a piston 42. The upper end of the piston rod 41 is fixedly connected to the lower part of the pressure head 10, and the piston 42 is located at the lower end of the piston rod 41. The end of the piston rod 41 with the piston 42 extends into the interior of the cylinder 30. The piston 42 is sealed to the interior of the cylinder 30. Thus, as the pressure head 10 drives the piston assembly 40 to reciprocate in the vertical direction relative to the cylinder 30, the product contained in the cylinder 30 can be pumped.

[0049] A lower check valve 50 is provided at the lower part of the cylinder 30. The lower check valve 50 includes a valve element 51, which is housed in a valve seat sleeve 52 that extends downward from the lower part of the cylinder 30.

[0050] The emulsion pump 1 also includes a spring 60, as shown in the figure, which is supported between the cylinder 30 and the piston 42. After one pumping cycle, the pressure head 10 and the piston assembly 40 will return to their top dead center under the action of the spring 60.

[0051] Figure 2 A cross-sectional view of the pump head 10 of the emulsion pump 1 is shown, in which a first thread 11, specifically an internal thread, is formed on the inner surface of the outer sleeve of the pump head 10, and the pitch of the first thread 11 is H1. Figure 3 A front view of the dental brace 20 is shown, in which a second thread 21, specifically an external thread, is formed on the outer surface of the dental brace 20. The pitch of the second thread 21 is also H1, so that the first thread 11 can engage with the second thread 21 to fix the pressure head 10 in its locking position.

[0052] In another alternative structure, the first thread 11 can be configured as an external thread, which is formed on the inner sleeve of the pressure head 10, and the second thread 21 can be configured as an internal thread, which is formed in the inner hole of the tooth sleeve 20.

[0053] Preferably, the first thread 11 and the second thread 21 can be formed as a double-thread structure, thereby doubling their lead, which helps to quickly lock or release the pressure head 10 and improve operating efficiency.

[0054] from Figure 3 As can be seen, there is a certain space below the second thread 21, allowing the first thread 11 on the pressure head 10 to be screwed completely below the end position of the second thread 21 after the pressure head 10 is tightened onto the cylinder 30. In this way, after tightening the pressure head 10, it can continue to rotate in the tightening direction, thereby positioning the pressure head 10 relative to the toothed sleeve 20 in the desired position.

[0055] When the pressure head 10 is rotated relative to the toothed brace 20 until the first thread 11 falls below the end position of the second thread 21, the spring 60 applies an upward thrust to the pressure head 10, causing it to spring upward a certain distance. To control this springing distance of the pressure head 10, the emulsion pump 1 of this application is provided with a limiting structure so that the upward springing distance of the pressure head 10 is less than the pitch H1 of the first thread 11 and the second thread 21.

[0056] Figure 4a and 4b A front view and a sectional view of the piston assembly 40 are shown. As shown, the piston assembly 40 includes a piston rod 41 and a piston 42 formed at the lower part of the piston rod 41. The piston 42 can be integrally formed on the piston rod 41 as shown, or the piston 42 can be formed separately and then assembled onto the piston rod 41, which is also within the scope of this application.

[0057] A downwardly extending sealing sleeve 43 is also provided at the lower end of the piston rod 41. Preferably, the sealing sleeve 43 extends downward and passes over the lower end of the piston 42. A first limiting structure is formed on the outer peripheral surface of the sealing sleeve 43, such as a limiting protrusion 44 formed on the outer peripheral surface of the sealing sleeve 43. Besides the limiting protrusion 44 continuously formed along the circumferential direction of the outer peripheral surface of the sealing sleeve 43, the first limiting structure can also be a plurality of protrusions formed discontinuously along the circumferential direction, which is also within the scope of this application.

[0058] Figure 5A cross-sectional view of cylinder 30 is shown, revealing a valve seat sleeve 52 for a lower one-way valve 50 formed at the lower part of cylinder 30. When the pressure head 10 is in its lower locked position, the sealing sleeve 43 of the piston assembly 40 extends into the valve seat sleeve 52, and the outer surface of the sealing sleeve 43 can seal against the inner surface of the valve seat sleeve 52. A second limiting structure is formed on the inner surface of the valve seat sleeve 52, such as a limiting groove 53 shown in the figure. The limiting groove 53 is positioned such that when the pressure head 10 is in its lower locked position, the limiting protrusion 44 on the sealing sleeve 43 of the piston assembly 40 can engage with the limiting groove 53. Furthermore, the size (e.g., width) of the limiting groove 53 is larger than the size (e.g., width) of the limiting protrusion 44. In this way, when the limiting protrusion 44 is fitted into the limiting groove 53, the limiting protrusion 44 is allowed to move up and down within a certain range in the limiting groove 53.

[0059] like Figure 6 As shown, when the pressure head 10 is rotated relative to the toothed sleeve 20 to the thread termination position where the first thread 11 passes over the second thread 21, the pressure head 10 springs up relative to the toothed sleeve 20 by a height H2 under the action of the spring 60. This H2 is preferably set to be less than the pitch H1 of the first thread 11 and the second thread 21.

[0060] Specifically, such as Figure 7a As shown, when the pressure head 10 is fully tightened relative to the dental sleeve 20, the limiting protrusion 44 is located at the bottom of the limiting groove 53. Under the action of the spring 60, the pressure head 10 and the piston assembly 40 are lifted upwards. At this time, the limiting protrusion 44 will contact the top of the limiting groove 53, as shown. Figure 7b As shown, this prevents the limiting protrusion 44 from continuing to move upward, that is, it restricts the piston assembly 40 and the pressure head 10 from continuing to move upward.

[0061] exist Figure 7a and Figure 7b As shown, when the limiting protrusion 44 contacts the bottom of the limiting groove 53, the height of the gap between the limiting protrusion 44 and the top of the limiting groove 53 is H2. Thus, under the action of the spring 60, the height of the upward movement of the pressure head 10 and the piston assembly 40 is limited to within H2, and H2 is set to be less than H1 as described above. Therefore, the height at which the pressure head 10 is lifted upward is limited to within one pitch, thereby reducing the gap between the pressure head 10 and the toothed sleeve 20, and the lifted pressure head 10 will not be skewed, thus making the assembled emulsion pump 1 look more aesthetically pleasing.

[0062] Additionally, it should be noted that in the lower locking position, it is also necessary for the pressure head 10 to spring upwards a certain height under the action of the spring 60 to create a certain gap between the pressure head 10 and the toothed sleeve 20. By springing the pressure head 10 upwards, the first thread 11 in the pressure head 10 can contact the second thread 21 on the toothed sleeve 20, so that the pressure head 10 can be opened from the toothed sleeve 20 when the pressure head 10 is rotated in the relaxation direction.

[0063] In addition to the limiting protrusion 44 and limiting groove 53 described above with reference to the accompanying drawings, the first limiting structure and the second limiting structure can also take other forms. For example, the first limiting structure can be a plurality of discontinuous protrusions arranged circumferentially. Furthermore, the positions of the limiting protrusion 44 and the limiting groove 53 can be interchanged, i.e., a groove can be formed on the sealing sleeve 43, and a protrusion can be formed on the valve seat sleeve 52. As another example, the first limiting structure and the second limiting structure can also be formed on other parts where the piston rod 41 and the inner surface of the cylinder 30 form a sealing fit.

[0064] The exemplary structure of the emulsion pump of this application has been described in detail above. Those skilled in the art will recognize that various obvious modifications, variations, and recombinations can be made based on the above disclosure, and these are all within the scope of this application.

Claims

1. An emulsion pump comprising a head, a socket and a cylinder, the cylinder comprising a cylinder cover, the socket being fixedly connected or integrally formed with the cylinder cover, a lower portion of the head being provided with a piston assembly, the piston assembly comprising a piston rod and a piston provided on the piston rod, the emulsion pump further comprising a spring, the spring being supported between the piston assembly and the cylinder, wherein, A first thread is formed on the pressure head, a second thread is formed on the mouthpiece, the first thread and the second thread have a pitch of H1, and are arranged such that the first thread can completely pass the end position of the second thread when the pressure head is screwed onto the mouthpiece; characterized in that a first limiting structure is formed on the piston rod, a second limiting structure is formed on the inner wall of the cylinder, the first limiting structure cooperates with the second limiting structure when the pressure head is screwed onto the mouthpiece, and the first limiting structure can be popped up by a height H2 relative to the second limiting structure under the action of the spring, wherein H2 < H1.

2. The lotion pump of claim 1, wherein The first limiting structure is a limiting protrusion formed on one of the outer surface of the piston rod and the inner surface of the cylinder, and the second limiting structure is a limiting groove formed on the other one of the outer surface of the piston rod and the inner surface of the cylinder.

3. The lotion pump of claim 2, wherein The limiting protrusion is formed as a limiting protruding ring or as a plurality of intermittent protrusions arranged circumferentially.

4. The lotion pump of any one of claims 1-3, wherein the valve is a ball valve. The piston assembly comprises a sealing sleeve extending downward from the lower end of the piston rod, and the first limiting structure is formed on the outer surface of the sealing sleeve; and A lower one-way valve is arranged at the lower part of the cylinder, the lower one-way valve comprises a valve piece and a valve seat sleeve, the valve seat sleeve is formed at the lower part of the cylinder and accommodates the valve piece, and the second limiting structure is formed on the inner surface of the valve seat sleeve.

5. The lotion pump of claim 4, wherein the valve is a ball valve. The outer surface of the sealing sleeve and the inner surface of the valve seat sleeve can form a sealing fit.

6. The lotion pump of claim 1, wherein The mouthpiece is integrally formed with the cylinder cover.

7. The lotion pump of claim 1, wherein The first thread and the second thread are double thread.

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