Pump head and container

Abstract

The utility model discloses a pump head which comprises a pump body shell and a pump body assembly. The pump body shell comprises a containing cavity and a liquid inlet flow channel. The pump body assembly comprises a pressing head, a connecting rod, a piston sleeve and a plastic elastic pipe. The piston sleeve is at least partially located in the containing cavity and can move in the containing cavity. One end of the plastic elastic tube is hermetically connected with the piston sleeve, and the opposite end of the plastic elastic tube is butted with the liquid inlet runner. One end of the connecting rod is connected with the pressing head, the opposite end of the connecting rod extends into the piston sleeve, and the connecting rod can move in the piston sleeve and can be switched between the position communicated with the plastic elastic pipe and the position not communicated with the plastic elastic pipe. The utility model further discloses a container with the pump head. According to the pump head, on one hand, metal pieces such as springs do not need to be used, disassembly is not needed during recycling, time and labor are saved, and meanwhile the problems such as pollution caused by the metal pieces are solved. And on the other hand, liquid in the container can be isolated from the outside when not in use, so that the liquid in the container is prevented from being polluted or deteriorated.

Description

Technical Field

[0001] The utility model relates to the technical field of pumps, in particular to a pump head and a container with the pump head. Background Art

[0002] In daily life, we often come into contact with liquid bottles with pump heads, such as hand sanitizer, spray, shampoo, etc. When using these liquid bottles, you only need to press the pump head to pump out the liquid in the bottle, which is very convenient to use. However, the existing pump heads have the following defects:

[0003] (1) After the first use, the existing pump head keeps the liquid in the container connected to the external environment. However, liquid bottles for daily use (such as shampoo and hand soap) are often placed in a humid environment. The liquid in the bottle is easily affected by the environment, resulting in contamination, rapid deterioration, and short shelf life.

[0004] (2) The existing pump head contains metal parts such as springs. When recycling, the metal parts and plastic parts need to be separated, which is time-consuming and labor-intensive. In addition, the metal parts are prone to rust, causing contamination of the liquid in the bottle.

[0005] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0006] The purpose of the utility model is to provide a pump head and a container with the pump head which can solve the above problems.

[0007] To achieve the above objectives, an embodiment of the utility model provides a pump head, comprising:

[0008] The pump body shell comprises a receiving cavity and a liquid inlet channel;

[0009] Pump assembly, including

[0010] Press the head;

[0011] a piston sleeve, at least partially located in the receiving chamber and movable in the receiving chamber;

[0012] A plastic elastic tube, located in the receiving chamber, with one end connected to the piston sleeve and the opposite end in communication with the liquid inlet channel;

[0013] A connecting rod comprises an infusion channel and at least one through hole connected to the infusion channel, wherein the infusion channel passes through one end of the connecting rod and extends to the other end, the through hole is arranged on the side of the connecting rod, one end of the connecting rod is connected to the pressing head, and the opposite end extends into the piston sleeve, the connecting rod can move in the piston sleeve and can switch between a first position and a second position, wherein the first position is a position where the through hole is connected to the plastic elastic tube, and the second position is a position where the through hole is not connected to the plastic elastic tube.

[0014] In one or more embodiments of the present invention, a flange is constructed on the piston sleeve and abuts against the inner wall of the accommodating cavity in the circumferential direction, and the plastic elastic tube sleeve is arranged on the outside of the piston sleeve and abuts against the flange.

[0015] In one or more embodiments of the present invention, a blocking member is provided at the outlet of the infusion channel, and the blocking member opens the outlet of the infusion channel when the pressing head is subjected to force, and closes the outlet of the infusion channel when the pressing head is not subjected to force.

[0016] In one or more embodiments of the present invention, the blocking member is a plastic bead, and an inclined surface matching the plastic bead is provided at the outlet of the infusion channel, and the inclined surface makes the cross section of the infusion channel funnel-shaped.

[0017] In one or more embodiments of the present invention, the pressing head includes a liquid outlet and a liquid outlet channel connected to the liquid outlet, the connecting rod is inserted into the liquid outlet channel, and a limiting portion for limiting the movement of the connecting rod is provided in the liquid outlet channel.

[0018] In one or more embodiments of the present invention, the plastic elastic tube comprises a wall body and a cavity enclosed by the wall body, and the cross-section of the wall body is corrugated.

[0019] In one or more embodiments of the present invention, at least one protrusion is provided on the outer side wall of the connecting rod, and a gap is formed between the connecting rod and the piston sleeve through the protrusion.

[0020] In one or more embodiments of the present invention, in the moving direction of the pressing head, there is a gap between the pressing head and the piston sleeve.

[0021] In one or more embodiments of the present invention, the pump head also includes a straw inserted into the liquid inlet channel, and a sealing member is provided in the liquid inlet channel. The sealing member is located at the opening of the straw, and the sealing member closes the opening of the straw when the pressing head is subjected to force, and opens the opening of the straw when the pressing head is not subjected to force.

[0022] An embodiment of the utility model further provides a container, comprising the pump head described above.

[0023] Compared with the prior art, (1) the pump head according to the embodiment of the utility model adopts a plastic elastic tube to replace the metal elastic parts in the prior art, so there is no need to disassemble the pump head when recycling it, which saves time and effort. In addition, since the pump head does not need to use metal elastic parts, it can also avoid problems such as pollution caused by the use of metal parts.

[0024] (2) According to the pump head of the embodiment of the utility model, the connecting rod can switch between a position connected with the plastic elastic tube and a position not connected, so that when the pump head is not pressed, the liquid in the bottle is sealed from the external environment; when pressed, the seal is released and the liquid in the bottle flows out under pressure, with good sealing performance to avoid being polluted or deteriorated by the environment.

[0025] (3) According to the pump head of the embodiment of the utility model, the plastic elastic tube and the piston sleeve are sealed and connected to the liquid inlet channel, so as to prevent liquid from entering between the plastic elastic tube and the pump body shell and avoid wasting liquid.

[0026] (4) According to the pump head of the embodiment of the utility model, a gap is formed between the connecting rod and the piston sleeve. By setting the gap, more liquid can enter the infusion channel of the connecting rod through the gap and the through hole when pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a three-dimensional diagram of a pump head according to an embodiment of the utility model;

[0028] Figure 2 yes Figure 1 Exploded view of the middle pump head;

[0029] Figure 3 yes Figure 1 Cross-section of the middle pump head (without the cap) Figure 1 ;

[0030] Figure 4 yes Figure 1 Cross-section of the middle pump head (without the cap) Figure 2 ;

[0031] Figure 5 yes Figure 2 A cross-sectional view of the middle pressing head;

[0032] Figure 6 yes Figure 2 A perspective view of the middle connecting rod;

[0033] Figure 7 yes Figure 2 A perspective view of the piston sleeve;

[0034] Figure 8 yes Figure 2 Cross-sectional view of the pump housing.

[0035] Description of main reference numerals:

[0036] 10-pump body shell, 11-receiving chamber, 12-liquid inlet channel, 20-pump body assembly, 21-pressing head, 211-liquid outlet, 212-liquid outlet channel, 213-limiting part, 22-connecting rod, 221-infusion channel, 222-through hole, 223-raised part, 224-convex ring, 23-piston sleeve, 231-flange, 232-sealing part, 24-plastic elastic tube, 30-suction straw, 40-cap body, M-gap, N-blocking piece. DETAILED DESCRIPTION

[0037] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0038] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0039] like Figure 1 As shown, a pump head according to a preferred embodiment of the utility model does not need to use metal parts such as springs, and does not need to be disassembled when recycled. On the one hand, it has the advantages of saving time and labor, and on the other hand, it can also avoid problems such as pollution caused by the use of metal parts. Of course, in addition to the above advantages, a pump head according to a preferred embodiment of the utility model at least has the advantage of preventing the liquid in the container from being contaminated or deteriorated.

[0040] Specifically, combined Figure 2~Figure 4 As shown, the pump head includes a pump housing 10 and a pump assembly 20 .

[0041] The pump housing 10 is a hollow plastic part with two ends opened, which includes a receiving cavity 11 and a liquid inlet channel 12. The receiving cavity 11 is configured to receive the pump assembly 20, and the liquid inlet channel 12 is docked with the pump assembly 20 and configured to transport the liquid in the container (including but not limited to a bottle) to the pump assembly 20.

[0042] The pump assembly 20 is at least partially assembled in the receiving chamber 11 and connected to the liquid inlet channel 12, and is configured to pump the liquid in the container out of the container. Figure 2~Figure 4 As shown, the pump assembly 20 includes a pressing head 21 , a connecting rod 22 , a piston sleeve 23 , and a plastic elastic tube 24 .

[0043] The piston sleeve 23 is at least partially assembled in the receiving chamber 11 and can move in the receiving chamber 11. Figure 3~Figure 4 As shown, one end of the piston sleeve 23 is located in the receiving cavity 11, and the opposite end is located outside the receiving cavity 11, and the piston sleeve 23 can move along the vertical direction shown in the figure.

[0044] The plastic elastic tube 24 is a hollow structure with both ends open. One end of the plastic elastic tube 24 is connected to the end of the piston sleeve 23 located in the accommodating chamber 11, and the opposite end is connected to the liquid inlet channel 12. The plastic elastic tube 24 is constructed to absorb liquid from the container into the interior through the liquid inlet channel 12 by relying on changes in its internal pressure, or to rely on changes in its internal pressure to transport the liquid inside to the connecting rod 22.

[0045] The connecting rod 22 includes an infusion channel 221 and at least one through hole 222 connected to the infusion channel 221. The infusion channel 221 passes through one end of the connecting rod 22 and extends to the other end. The through hole 222 is provided on the side of the connecting rod 22. The connecting rod 22 is at least partially assembled in the piston sleeve 23 and can move in the piston sleeve 23, while the part located outside the piston sleeve 23 is connected to the pressing head 21, as shown in FIG. Figure 3~Figure 4 As shown, one end of the connecting rod 22 is located in the piston sleeve 23, and the opposite end is located outside the piston sleeve 23 and connected to the pressing head 21, and the connecting rod 22 can move in the vertical direction. After the pressing head 21 is connected to the connecting rod 22, there is a certain gap between the pressing head 21 and the piston sleeve 23 in the moving direction of the pressing head 21, so that the pressing head 21 can drive the connecting rod 22 to move in the piston sleeve 23.

[0046] Combination Figure 3~Figure 4 As shown, the connecting rod 22 can switch between a first position and a second position during the movement, wherein the first position is a position where the through hole 222 is connected to the plastic elastic tube 24, and the second position is a position where the through hole 222 is not connected to the plastic elastic tube 24, that is, when the connecting rod 22 moves to a certain position, the infusion channel 221 of the connecting rod 22 can be connected to the plastic elastic tube 24 through the through hole 222, so that the liquid in the plastic elastic tube 24 enters the connecting rod 22; when the connecting rod 22 moves to another position, the infusion channel 221 of the connecting rod 22 is no longer connected to the plastic elastic tube 24 through the through hole 222, and the liquid in the plastic elastic tube 24 cannot enter the connecting rod 22. In specific implementation, the connecting rod 22 is in a position not connected to the plastic elastic tube 24 by default, so as to ensure that the liquid is isolated from the outside to avoid deterioration or environmental pollution.

[0047] Combination Figure 1 , Figure 3~Figure 4As shown, in a specific implementation, the user applies pressure to the pressing head 21, and the pressing head 21 drives the connecting rod 22 to move downward a certain distance in the piston sleeve 23. When the pressing head 21 abuts against the piston sleeve 23, the connecting rod 22 moves into place, and at this time, the through hole 222 on the connecting rod 22 can be connected with the plastic elastic tube 24. The user continues to apply pressure to the pressing head 21, and the pressing head 21 further drives the piston sleeve 23 to move downward in the pump body shell 10. The piston sleeve 23 then applies pressure to the plastic elastic tube 24, and the plastic elastic tube 24 is compressed after being subjected to force. After the plastic elastic tube 24 is compressed, the pressure in its internal space changes, so that the internal liquid can enter the connecting rod 22, and the liquid in the connecting rod 22 is further discharged to the outside through the pressing head 21.

[0048] When the user stops applying pressure to the pressing head 21, the connecting rod 22 is reset, and the through hole 222 on the connecting rod 22 is no longer connected to the plastic elastic tube 24, so the liquid in the plastic elastic tube 24 cannot enter the connecting rod 22. The plastic elastic tube 24 also recovers its deformation, and the internal pressure of the plastic elastic tube 24 changes during the process of recovering its deformation, and the liquid in the container is sucked into the plastic elastic tube 241 through the liquid inlet channel to wait for the next user to press and output.

[0049] Combination Figure 3~Figure 5 As shown, the pressing head 21 includes a liquid outlet 211 and a liquid outlet channel 212. One end of the liquid outlet channel 212 is connected to the liquid outlet 211, and the opposite end is connected to the connecting rod 22. In this embodiment, the connecting rod 22 is inserted into the liquid outlet channel 212.

[0050] Combination Figure 3~Figure 4 , Figure 6 As shown, the connecting rod 22 is a plastic part. By default, the through hole 222 of the connecting rod 22 is blocked by the piston sleeve 23. At this time, the connecting rod 22 is in a position that is not connected to the plastic elastic tube 24, that is, the liquid in the plastic elastic tube 24 cannot enter the infusion channel 221 through the through hole 222; when the connecting rod 22 moves a certain distance in the piston sleeve 23 by applying pressure to the pressing head 21, the piston sleeve 23 no longer blocks the through hole 222. At this time, the connecting rod 22 is in a position that is connected to the plastic elastic tube 24, that is, the liquid in the plastic elastic tube 24 can enter the infusion channel 221 through the through hole 222.

[0051] Furthermore, a gap M is formed between the connecting rod 22 and the piston sleeve 23, and the gap M facilitates the flow of liquid. In a specific implementation, when pressure is applied to the pressing head 21, the pressing head 21 drives the connecting rod 22 to move in the piston sleeve 23. After the connecting rod 22 moves into place, the liquid in the plastic elastic tube 24 can enter the infusion channel 221 of the connecting rod 22 through the gap M and the through hole 222. When the pressure on the pressing head 21 stops, the connecting rod 22 can move in the reverse direction, and the through hole 222 of the connecting rod 22 is sealed by the piston sleeve 23, and the liquid can no longer enter the connecting rod 22 through the through hole 222, but at this time, the gap M between the connecting rod 22 and the piston sleeve 23 is filled with liquid.

[0052] In this embodiment, at least one protrusion 223 is provided on the outer wall of the connecting rod 22, and the gap M is formed between the connecting rod 22 and the piston sleeve 23 through the protrusion 223. Specifically, when one protrusion 223 is provided on the outer wall of the connecting rod 22, a recessed area is formed on the outer wall of the connecting rod 22 near the protrusion 223, and a gap M can be formed between the inner wall of the piston sleeve 23 through the recessed area; when multiple protrusions 223 are provided on the outer wall of the connecting rod 22, a recessed area is formed on the outer wall of the connecting rod 22 between two adjacent protrusions 223, and a gap M can be formed between the inner wall of the piston sleeve 23 through the recessed area. By providing the gap M, more liquid can enter the infusion channel 221 of the connecting rod 22 through the gap M and the through hole 222 when pressed.

[0053] Combination Figure 3~Figure 6 As shown, when the connecting rod 22 is inserted into the liquid outlet channel 212, in order to prevent the connecting rod 22 from sliding in the liquid outlet channel 212, or to keep the two relatively stable, a limiter 213 is provided in the liquid outlet channel 212. When the connecting rod 22 is inserted into the liquid outlet channel 212, it cooperates with the limiter 213 to prevent movement. Figure 5 and Figure 6 As shown, in this embodiment, the limiting portion 213 is a groove formed on the inner wall of the liquid outlet channel, and a convex ring 224 matching the groove is provided on the connecting rod 22. Of course, in other embodiments, the limiting portion 213 can also be a step structure. In this case, the top end of the connecting rod 22 abuts against the step structure when inserted into the liquid outlet channel 212 to prevent it from moving.

[0054] Combination Figure 3~Figure 4 , Figure 7As shown, the piston sleeve 23 is a hollow plastic part with two ends open. The outer wall of the piston sleeve 23 is configured with a flange 231, and the flange 231 abuts against the inner wall of the receiving chamber 11 in the circumferential direction. The flange 231 is used to abut against the plastic elastic tube 24 on the one hand, so that the piston sleeve 23 can drive the plastic elastic tube 24 to compress, and on the other hand, the piston sleeve 23 can stably move in the receiving chamber 11 of the pump housing 10. In specific implementation, the flange 231 divides the piston sleeve 23 into a first part on the upper side and a second part on the lower side. The plastic elastic tube 24 is sleeved on the second part of the piston sleeve 23 and is sealed and connected to the piston sleeve 23. At the same time, the plastic elastic tube 24 also abuts against the flange 231. Of course, in other embodiments, the plastic elastic tube 24 may not abut against the flange 231 according to actual needs, but the plastic elastic tube 24 needs to be directly and sealedly connected to the piston sleeve 23.

[0055] Furthermore, the inner wall of the piston sleeve 23 is provided with a sealing portion 232, and the sealing portion 232 is configured to block the through hole 222 of the connecting rod 22. In this embodiment, the sealing portion 232 is directly formed by the inner wall of the piston sleeve 23, that is, the inner wall of the piston sleeve 23 can achieve the blocking of the through hole 222 on the connecting rod 22.

[0056] Combination Figure 3~Figure 4 , Figure 8 As shown, the plastic elastic tube 24 is a hollow structure with both ends open, which has good elastic deformation ability, can change its original shape by compression when subjected to force, and restore its original shape when not subjected to force. The plastic elastic tube 24 is preferably made of silicone material or other flexible materials. In specific implementation, one end of the plastic elastic tube 24 is sleeved on the outside of the piston sleeve 23 and abuts the flange 231, and the opposite end is connected to the liquid inlet channel 12. Of course, in other embodiments, one end of the plastic elastic tube 24 can be directly sealed and connected to the piston sleeve 23, which can be set according to actual needs. Here, the plastic elastic tube 24 is sealed with the piston sleeve 23 and the liquid inlet channel 12, which can prevent the liquid from flowing into the space between the plastic elastic tube 24 and the pump body shell 10, avoiding waste.

[0057] Furthermore, in the specific implementation, if Figure 8 As shown, an extension tube portion 13 protruding into the receiving cavity 22 is provided at the intersection of the liquid inlet channel 12 and the receiving cavity 22 , and a plastic elastic tube 24 is sleeved on the outside of the extension tube portion 13 to achieve a sealed connection with the liquid inlet channel 12 .

[0058] In this embodiment, the plastic elastic tube is a corrugated tube, which has a wall body, and the wall body encloses a cavity, and the cavity can be used to store liquid. The cross-sectional shape of the wall body here is corrugated, so the plastic elastic tube is a corrugated tube.

[0059] like Figure 1~Figure 2As shown, the pump head further includes a straw 30, which is connected to the liquid inlet channel 12. In a specific implementation, the straw 30 is inserted into the liquid inlet channel 12 to achieve communication with the liquid inlet channel 12. The straw 30 enables the pump head to transport liquid from a deeper part or the bottom of the container (such as the bottom of a bottle) to the outside.

[0060] Further, the pump head further comprises a cap body 40, which is connected to the pump housing 10, and the cap body 40 is configured to connect the pump head to the container. In specific implementation, the cap body 40 can be connected to the container by means including but not limited to threaded connection and snap connection.

[0061] Combination Figure 3~Figure 4 As shown, in order to prevent the liquid in the plastic elastic tube 24 from flowing back, that is, to prevent the liquid in the plastic elastic tube 24 from flowing back into the container through the liquid inlet channel 12, a blocking piece N is provided in the liquid inlet channel 12, and the blocking piece N is located at the opening of the straw 30. In a specific implementation, when an external force is applied to the pressing head 21, the pressing head 21 drives the plastic elastic tube 24 to compress through the piston sleeve 23, and part of the liquid in the plastic elastic tube 24 can push the blocking piece N to block the opening of the straw 30, thereby preventing backflow. When the external force is no longer applied to the pressing head 21, the plastic elastic tube 24 recovers its deformation, and the liquid in the straw 30 can push the blocking piece N away, so that the liquid in the straw 30 can enter the plastic elastic tube 24.

[0062] Of course, in other embodiments, a plugging piece (not shown) may also be provided at the outlet of the infusion channel 221 of the connecting rod 22. In a specific implementation, when an external force is applied to the pressing head 21, the pressing head 21 drives the plastic elastic tube 24 to compress through the piston sleeve 23, and the internal pressure of the plastic elastic tube 24 increases. The liquid in the plastic elastic tube 24 can enter the infusion channel 221 of the connecting rod 22 and push the plugging piece to no longer block the outlet of the infusion channel 221. The liquid can flow out to the outside through the liquid outlet channel 212. When the external force is no longer applied to the pressing head 21, the plastic elastic tube 24 recovers its deformation, the internal pressure of the plastic elastic tube 24 decreases and forms a certain pressure difference, so that the plugging piece can seal the outlet of the infusion channel 221, achieve sealing, and prevent the internal liquid from being contaminated or deteriorated.

[0063] In this embodiment, the plugging member is preferably a plastic bead. When a plugging member is provided at the outlet of the infusion channel 221, an inclined surface may also be provided at the outlet of the infusion channel 221 to carry the plastic bead, and the inclined surface makes the cross section of the infusion channel 221 funnel-shaped. Of course, when a plugging member is provided in the inlet channel 12, an inclined surface may also be constructed inside the inlet channel 12, and the plastic bead may be provided on the inclined surface, which may be provided according to actual needs.

[0064] The foregoing description of specific exemplary embodiments of the utility model is for the purpose of illustration and illustration. These descriptions are not intended to limit the utility model to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the utility model and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the utility model and various different options and changes. The scope of the utility model is intended to be defined by the claims and their equivalents.

Claims

1. A pump head, characterized in that: include: The pump body shell comprises a receiving cavity and a liquid inlet channel; Pump assembly, including Press the head; a piston sleeve, at least partially located in the receiving chamber and movable in the receiving chamber; A plastic elastic tube, located in the receiving chamber, with one end connected to the piston sleeve and the opposite end in communication with the liquid inlet channel; A connecting rod comprises an infusion channel and at least one through hole connected to the infusion channel, wherein the infusion channel passes through one end of the connecting rod and extends to the other end, the through hole is arranged on the side of the connecting rod, one end of the connecting rod is connected to the pressing head, and the opposite end extends into the piston sleeve, the connecting rod can move in the piston sleeve and can switch between a first position and a second position, wherein the first position is a position where the through hole is connected to the plastic elastic tube, and the second position is a position where the through hole is not connected to the plastic elastic tube, and the outer side wall of the connecting rod is provided with at least one protrusion, and a gap is formed between the connecting rod and the piston sleeve through the protrusion.

2. The pump head according to claim 1, characterized in that: The piston sleeve is provided with a flange which abuts against the inner wall of the accommodating cavity in the circumferential direction, and the plastic elastic tube sleeve is arranged on the outside of the piston sleeve and abuts against the flange.

3. The pump head according to claim 1, characterized in that: A blocking piece is provided at the outlet of the infusion channel. The blocking piece opens the outlet of the infusion channel when the pressing head is subjected to force, and closes the outlet of the infusion channel when the pressing head is not subjected to force.

4. The pump head according to claim 3, characterized in that: The blocking piece is a plastic ball, and an inclined surface matching with the plastic ball is arranged at the outlet of the infusion channel, and the inclined surface makes the cross section of the infusion channel funnel-shaped.

5. The pump head according to claim 1, characterized in that: The pressing head comprises a liquid outlet and a liquid outlet channel connected with the liquid outlet, the connecting rod is inserted into the liquid outlet channel, and a limiting portion for limiting the movement of the connecting rod is provided in the liquid outlet channel.

6. The pump head according to claim 1, characterized in that: The plastic elastic tube comprises a wall body and a cavity surrounded by the wall body, and the cross-section of the wall body is corrugated.

7. The pump head according to claim 1, characterized in that: In the moving direction of the pressing head, there is a gap between the pressing head and the piston sleeve.

8. The pump head according to claim 1, characterized in that: The pump head also includes a straw plugged into the liquid inlet channel. A blocking member is provided in the liquid inlet channel. The blocking member is located at the opening of the straw. The blocking member closes the opening of the straw when the pressing head is subjected to force, and opens the opening of the straw when the pressing head is not subjected to force.

9. A container, characterized in that: A pump head comprising any one of claims 1 to 8.

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