Pressure head of liquid pump and liquid pump comprising same

Abstract

A pressure head of a liquid pump includes: an inner tube in which an inner tube channel is formed; the pressing nozzle extends outwards from the inner pipe in the radial direction, a liquid outlet channel is formed in the pressing nozzle, a liquid outlet is formed in one end of the liquid outlet channel, and a liquid inlet communicated with the inner pipe channel is formed in the other opposite end of the liquid outlet channel. According to the liquid outlet channel, at least one adsorption rib is arranged in the liquid outlet channel, the adsorption rib is formed on the inner surface of the liquid outlet channel and extends towards the liquid outlet from the liquid inlet of the liquid outlet channel, and the adsorption rib extends out of at least one part of the length of the liquid outlet channel. The utility model further provides a liquid pump comprising the pressure head. The pressing head of the structure and the liquid pump comprising the pressing head are beneficial to reducing or avoiding the risk that a product leaks out of the liquid outlet channel of the pressing nozzle, and therefore the using experience feeling of consumers is beneficial to being improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of product packaging, and in particular to a liquid pump for dispensing a liquid or semi-liquid product contained in a container, and more particularly to the design of the head of the liquid pump. BACKGROUND

[0002] Liquid pumps are widely used in product packaging in fields such as daily chemicals, food, medicine, etc. They are installed on the mouth of a container containing a liquid or semi-liquid product, and are used to dispense the product outwardly for use. A liquid pump comprises a head, and the product in the container can be pumped out of the head through a nozzle by pressing the head of the liquid pump. The nozzle is provided with a liquid outlet channel, which is in communication with the internal space of the liquid pump, such as the interior of a cylinder, and the product can flow into the liquid outlet channel and out of the nozzle via the liquid outlet channel.

[0003] It is found in use that when the product being pumped is a liquid with a small viscosity, such as a product like makeup oil or massage oil, after a pump of the product, some of the product may leak out when it is not needed to be pumped out. Through research, the applicant has found that the design of the nozzle is one of the main causes of product leakage.

[0004] Generally speaking, in order to have a good appearance of the liquid pump, the nozzle is provided in a flat shape and extends in a horizontal or substantially horizontal direction. For a nozzle with such an appearance, after a pump of the product, a certain amount of the product will remain in the nozzle. If the product involved has a small viscosity, when the nozzle is subjected to an external force, or the orientation of the liquid pump is changed so that the opening of the nozzle is downward, the liquid product remaining in the nozzle will flow out due to the action of its own gravity, and at least part of the product flowing out will flow along the lower surface of the nozzle to the head, the mouthpiece, or even the bottle of the container, causing contamination of the liquid pump and the container on which the liquid pump is installed.

[0005] In some cases where the liquid outlet channel in the nozzle is provided with a large cross-sectional area due to the need for a large liquid outlet volume, the product leakage will be more serious. Such leakage of the product will not only cause waste of the product, but more importantly, the leaked product will contaminate the liquid pump, the container, and other objects placed together with them, thereby reducing the user experience of the consumer.

[0006] Therefore, it is necessary to improve the structure of the liquid pump to avoid or at least significantly reduce the leakage of the product from the nozzle, to reduce or avoid the waste of the product, and to improve the user experience of the consumer. SUMMARY

[0007] The present application is made to solve the problems existing in the prior art. The object of the present application is to provide a pressure head structure of a liquid pump with improved structure, which can reduce or even avoid the risk of product leakage from the pressure nozzle of the pressure head. Alternatively, even if there is product leakage, the structure of the pressure head can prevent the product from flowing to other parts of the liquid pump, or even to the container. The present application also provides a liquid pump comprising the pressure head.

[0008] The present application provides a pressure head of a liquid pump, comprising: an inner tube, in which an inner tube channel is formed; and a pressure nozzle extending radially outward from the inner tube, in which a liquid outlet channel is formed, one end of the liquid outlet channel is formed with a liquid outlet, and the opposite end of the liquid outlet channel is formed with a liquid inlet communicating with the inner tube channel. In the present application, at least one adsorption fin is arranged in the liquid outlet channel, the adsorption fin is formed on the inner surface of the liquid outlet channel, extends from the liquid inlet of the liquid outlet channel towards the liquid outlet, and the adsorption fin extends at least part of the length of the liquid outlet channel.

[0009] By arranging at least one adsorption fin in the liquid outlet channel of the pressure nozzle, the adsorption fin can adsorb the liquid product in the liquid outlet channel, which helps to reduce or avoid the risk of product leakage from the liquid outlet channel of the pressure nozzle, thereby improving the user experience.

[0010] Preferably, the adsorption fin extends the entire length of the liquid outlet channel. In this way, the liquid product remaining in the liquid outlet channel can be maximally adsorbed to prevent leakage to the outside.

[0011] In an exemplary structure, the cross section of the liquid outlet channel is formed in a rectangular shape, the liquid outlet channel includes a top inner surface and a bottom inner surface, and the at least one adsorption fin includes:

[0012] at least one lower adsorption fin formed on the bottom inner surface; and / or

[0013] at least one upper adsorption fin formed on the top inner surface.

[0014] Further specifically, the lower adsorption fin and the upper adsorption fin are arranged in alignment with each other or staggered with each other in the height direction of the liquid outlet channel.

[0015] In addition, the cross section of the liquid outlet channel can also be formed in other shapes other than rectangular, such as circular, elliptical, etc. The adsorption fin can be arranged circumferentially in the liquid outlet channel with a circular or elliptical cross section, for example, can be uniformly distributed, or can also be unevenly distributed.

[0016] Preferably, the height of the adsorption fin is half the height of the liquid outlet channel. This height can achieve the adsorption effect of the adsorption fin on the liquid product remaining in the liquid outlet channel, while the influence on the bending needle strength and demolding of the mold of the pressure nozzle is relatively small.

[0017] Preferably, in order to improve the adsorption of the adsorption ribs to the product, the surface of the adsorption ribs can be provided with a rough surface or a patterned surface.

[0018] Preferably, the cross-sectional area of the liquid outlet is larger than the cross-sectional area of the liquid inlet. The larger cross-sectional area of the liquid outlet allows the liquid product in the liquid outlet channel to be pumped out as much as possible during the pumping process, thereby reducing the product remaining in the liquid outlet channel, which helps to reduce or avoid leakage of the remaining product from the liquid outlet channel.

[0019] Preferably, a flow-stopping groove is provided on the lower surface of the pressure nozzle, wherein the flow-stopping groove is provided close to the position of the liquid outlet of the liquid outlet channel. By providing the flow-stopping groove, even if some of the remaining product leaks out of the liquid outlet channel of the pressure nozzle after use, the leaked product can be prevented from flowing further along the lower surface of the pressure nozzle towards the body of the mouthpiece, other components of the mouthpiece or the liquid pump, and towards the container, thereby preventing the leaked product from contaminating the liquid pump and the container.

[0020] Preferably, the depth of the flow-stopping groove is greater than 0.2 mm. In addition, preferably, the width of the flow-stopping groove is greater than the width of the liquid outlet. This size of the flow-stopping groove can help to strengthen the flow-stopping effect on the leaked product.

[0021] A liquid pump is also provided, which comprises the pressure head, the mouthpiece, and the pump core as described above. BRIEF DESCRIPTION OF DRAWINGS

[0022] The features and advantages of the present application will become more apparent from the detailed description in conjunction with the accompanying drawings in which:

[0023] Figure 1 A front view of the liquid pump of the present application is shown.

[0024] Figure 2 A cross-sectional view of the pressure head of the liquid pump of Figure 1 is shown.

[0025] Figure 3 A partial enlarged view of part I of Figure 2 is shown.

[0026] Figure 4 A perspective view of the pressure head of Figure 2 is shown.

[0027] Figure 5 A partial enlarged view of part II of Figure 4 is shown.

[0028] Figure 6 A bottom perspective view of the pressure head of Figure 2 is shown.

[0029] (Symbol Description)

[0030] 1 liquid pump

[0031] 10 head

[0032] 11 inner tube

[0033] 12 inner tube passage

[0034] 13 lock head protrusion

[0035] 100 pressure nozzle

[0036] 110 liquid outlet passage

[0037] 111 liquid outlet

[0038] 112 liquid inlet

[0039] 121 lower suction rib

[0040] 122 upper suction rib

[0041] 131 flow stopping groove

[0042] 20 mouthpiece

[0043] 30 pump core DETAILED DESCRIPTION

[0044] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the drawings shown in the accompanying drawings are only the preferred embodiments of the present application, and do not constitute a limitation on the scope of the present application. Those skilled in the art can make various obvious modifications, variations, equivalent replacements to the present application on the basis of the embodiments shown in the drawings, and under the premise of no contradiction, the technical features described below in different embodiments can be combined with each other arbitrarily, which all fall within the protection scope of the present application.

[0045] Figure 1 A front view of the liquid pump 1 of the present application is shown. The liquid pump 1 includes a head 10, a mouthpiece 20 and a pump core 30. The pump core 30 includes, for example, a cylinder, a piston rod extending into the cylinder, a piston mounted at one end of the piston rod and in interference fit with the cylinder, etc. The structure of the pump core 30 in the present application adopts the structure of the pump core 30 commonly used in the prior art, and thus is not repeated here.

[0046] Figure 2 A front view of the liquid pump 1 of the present application is shown. The liquid pump 1 includes a head 10, a mouthpiece 20 and a pump core 30. The pump core 30 includes, for example, a cylinder, a piston rod extending into the cylinder, a piston mounted at one end of the piston rod and in interference fit with the cylinder, etc. The structure of the pump core 30 in the present application adopts the structure of the pump core 30 commonly used in the prior art, and thus is not repeated here. Figure 1Fig. 2 shows a cross-sectional view of the head 10 of the liquid pump 1. The head 10 comprises a downwardly extending inner tube 11, in which an inner tube channel 12 is formed, which is able to communicate with the interior space of the pump core 30, for example the interior space of a cylinder, so that the product in the cylinder interior space can flow into the inner tube channel 12.

[0047] The lower end of the inner tube 11 can be connected to a piston rod, or the piston rod can be formed integrally with the inner tube 11, which is within the scope of the present application. Further, as shown in Figure 4 Fig. 2, at least one lock head protrusion 13 is provided on the outer peripheral surface of the inner tube 11, for example two lock head protrusions 13 diametrically opposite as shown in the figure. By rotating the head 10, the lock head protrusion 13 can be aligned or misaligned with the corresponding groove or notch structure in the component, for example the cylinder, the socket, etc., so as to realize the locked state and the unlocked state of the liquid pump 1. For example, when the lock head protrusion 13 is aligned with the corresponding groove or notch structure, the head 10 is allowed to be pressed downward, so that the liquid pump 1 is in the unlocked state, when the head 10 is rotated to the position where the lock head protrusion 13 is misaligned with the groove or notch structure, the lock head protrusion 13 can prevent the head 10 from being pressed downward, so that the liquid pump 1 is in the locked state.

[0048] It can be seen that the structure of the liquid pump 1 shown in the drawings of the present application is an upper lock head liquid pump structure. However, it is pointed out here that the liquid pump 1 of the present application can also be of the lower lock head type.

[0049] Returning to Figure 2 , the head 10 further comprises a pressure nozzle 100, which extends radially outwardly from the inner tube 11 of the head 10, and the extension direction of the pressure nozzle 100 is a substantially horizontal direction. Continuing to refer to Figure 3 , a partial enlarged view of part I of Figure 2 is shown. It can be clearly seen from Figure 3 that a liquid outlet channel 110 is formed in the pressure nozzle 100, one end of the liquid outlet channel 110 opens to the outside to form a liquid outlet 111 of the liquid outlet channel 110, and the opposite end of the liquid outlet channel 110 communicates with the inner tube channel 12 of the inner tube 11 to form a liquid inlet 112.

[0050] Figure 5 Fig. 4 shows a perspective view of the head 10 from a different angle, in which the liquid outlet 111 of the liquid outlet channel 110 can be seen, Figure 6 Fig. 5 shows a partial enlarged view of part II of Figure 5 , from which the liquid outlet 111 and the internal structure of the liquid outlet channel 110 can be seen more clearly.

[0051] In the exemplary structure shown in the figure, the nozzle 100 is flat in shape, with the liquid outlet channel 110 having a cross-section that is generally flat and rectangular in shape. At least one suction rib is provided on the top inner surface and the bottom inner surface of the liquid outlet channel 110, for example, a lower suction rib 121 is formed on the bottom inner surface of the liquid outlet channel 110, and two upper suction ribs 122 are formed on the top inner surface of the liquid outlet channel 110.

[0052] Turning to Figure 3 , the lower suction rib 121 and the upper suction rib 122 preferably extend along the entire length of the liquid outlet channel 110, i.e. from the position at or adjacent to the liquid outlet 111 to the position at or adjacent to the liquid inlet 112.

[0053] By providing the lower suction rib 121 and the upper suction rib 122, the suction force on the liquid in the liquid outlet channel 110 can be increased, so that after a single pumping of the product, the liquid product remaining in the liquid outlet channel 110 can be retained in the liquid outlet channel 110 and thus will not leak out, or at least will not easily flow out of the liquid outlet channel 110.

[0054] The number of lower suction ribs 121 on the bottom inner surface of the liquid outlet channel 110 and the number of upper suction ribs 122 on the top inner surface of the liquid outlet channel 110 can be equal and aligned one-to-one in the height direction of the liquid outlet channel 110, or the lower suction ribs 121 and the upper suction ribs 122 can also be arranged staggered with respect to each other.

[0055] In addition, in addition to the generally rectangular shape shown in the figure, the cross-section of the liquid outlet channel 110 can also be other shapes, such as circular, oval, etc. The suction ribs can be arranged circumferentially along the inner surface of the nozzle 100 of the circular or oval cross-section, and the spacing between adjacent two suction ribs can be uniform or non-uniform, which are all within the scope of the present application.

[0056] Preferably, the height of the lower suction rib 121 and the upper suction rib 122 can be half the height of the liquid outlet channel 110. Such a height setting can on the one hand ensure effective suction of the liquid product in the liquid outlet channel 110, and on the other hand also make the bending needle strength of the mold of the nozzle 100 and the demolding during the molding of the die head 10 less affected.

[0057] Preferably, in order to improve the suction capacity of the lower suction rib 121 and the upper suction rib 122 on the product in the liquid outlet channel 110, the outer surface of the lower suction rib 121 and the upper suction rib 122 can be provided as a rough surface or a surface with patterns.

[0058] Further, only one of the lower and upper suction ribs 121 and 122 can be provided in the liquid outlet passage 110. In addition to the exemplary structure shown in the drawings, the number of each of the lower and upper suction ribs 121 and 122 can be set to other numbers as needed.

[0059] Still further, the suction ribs disclosed above that extend along the entire length of the liquid outlet passage 110 are preferred, which can provide the greatest suction effect. Of course, the suction ribs can also extend only a portion of the length of the liquid outlet passage 110, which at least partially has a suction effect on the liquid product in the liquid outlet passage 110, and such a case is also within the scope of the present application.

[0060] Preferably, as shown in Figure 3 the cross-sectional area of the liquid outlet 111 can be greater than the cross-sectional area of the liquid inlet 112. With such a cross-sectional area arrangement, when pumping the liquid product outward, as much of the product in the liquid outlet passage 110 as possible is allowed to be pumped out, so that the amount of liquid product remaining in the liquid outlet passage 110 is small, which further helps to reduce or even prevent leakage of the residual product in the pressure nozzle 100.

[0061] In combination with Figure 3 and Figure 4 , shown in which a flow-stopping groove 131 is provided on the lower surface of the pressure nozzle 100, which is preferably provided close to the liquid outlet 111 of the liquid outlet passage 110. In this way, even if some of the liquid product leaks out of the pressure nozzle 100, when it flows to the position of the flow-stopping groove 131 it will be retained in the flow-stopping groove 131, or the flow-stopping groove 131 can prevent the liquid product from flowing along the lower surface of the pressure nozzle 100 toward the body of the pressure head 10 or the dental brace 20. In this way, the leaked product can be prevented from contaminating other components of the liquid pump or the container.

[0062] Preferably, the depth of the flow-stopping groove 131 is greater than 0.2 mm, so that more of the liquid product can be retained, improving the flow-stopping effect. In addition, preferably, the width of the flow-stopping groove 131 is set to be greater than the width of the liquid outlet passage 110.

[0063] The structure of the liquid pump of the present application, and more specifically the pressure head of the liquid pump, has been described in detail above. Those skilled in the art will know that various obvious modifications, variations, re-combinations, etc. can be made on the basis of the disclosure above, and these are also within the scope of the present application.

Claims

1. A pressure head for a liquid pump, the pressure head comprising: The inner tube has an inner tube channel; and the nozzle extends radially outward from the inner tube, has a liquid outlet channel formed in the nozzle, has a liquid outlet at one end of the liquid outlet channel, and has a liquid inlet communicating with the inner tube channel at the opposite end of the liquid outlet channel. The feature is that at least one adsorption rib is provided in the liquid outlet channel, the adsorption rib is formed on the inner surface of the liquid outlet channel, extends from the liquid inlet of the liquid outlet channel toward the liquid outlet, and the adsorption rib extends at least a portion of the length of the liquid outlet channel.

2. The pressure head as described in claim 1, characterized in that, The adsorption ribs extend the entire length of the liquid outlet channel.

3. The pressure head as described in claim 1, characterized in that, The liquid outlet channel has a rectangular cross-section and includes a top inner surface and a bottom inner surface. The at least one adsorption rib includes: At least one lower adsorption rib is formed on the inner surface of the bottom; and / or At least one upper adsorption rib is formed on the inner surface of the top.

4. The pressure head as described in claim 3, characterized in that, The lower adsorption rib and the upper adsorption rib are arranged aligned with or staggered with each other in the height direction of the liquid outlet channel.

5. The pressure head as described in claim 3, characterized in that, The height of the adsorption rib is half the height of the liquid outlet channel.

6. The pressure head as described in claim 1, characterized in that, The surface of the adsorption rib is a rough surface or a patterned surface.

7. The pressure head as described in claim 1, characterized in that, The cross-sectional area of ​​the liquid outlet is larger than the cross-sectional area of ​​the liquid inlet.

8. The pressure head as described in claim 1, characterized in that, A flow-stop groove is provided on the lower surface of the nozzle, wherein the flow-stop groove is located near the outlet of the liquid outlet channel.

9. The pressure head as described in claim 8, characterized in that, The depth of the flow-stopping groove is set to be greater than 0.2 mm; and / or The width of the flow-stopping groove is set to be greater than the width of the liquid outlet.

10. A liquid pump, characterized in that, The liquid pump includes a pressure head, a toothed fitting, and a pump core as described in any one of claims 1-9.

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