Pump head and container using the same

Abstract

A pump head component, a pump head including the pump head component, and a container are provided. [Solution] The pump head component includes a liquid cache section, an opening, and a closed end. One end of the opening is connected to the liquid cache section and the other end is connected to the closed end. The internal space between the liquid cache section and the opening is a liquid storage space, and one end of the liquid storage space is closed by an externally installed piston and the other end is closed by the closed end. The opening is provided with an opening through which the extracted liquid enters and exits the liquid storage space. This pump head component has a simple structure, is multifunctional, and is easy to mass-produce. It does not require a large amount of material for the product, thereby reducing production costs. Furthermore, the components required for this pump head component are simple and few in number, making production and assembly convenient. Therefore, it can achieve the mixing function that was previously only possible with multiple components in conventional pump heads.

Description

Technical Field

[0001] The present invention relates to pump head components, a pump head provided with such pump head components, and a container, and more particularly to pump head components suitable for large-scale industrial production and assembly, a pump head provided with such pump head components, and a container.

Background Art

[0002] A pump head is a product frequently used in people's lives, and many liquid and paste products can be taken out of a container using the pump head.

[0003] Conventional pump heads are not expensive, but have many parts, and the material cost and assembly cost account for a large proportion of the production cost. However, to reduce the number of parts, it is necessary to reorganize and modify the structure of the pump head. However, reorganizing the structure is costly in terms of research and development, difficult, and few people attempt it. Therefore, although pump head technology belongs to traditional technology, it is widely used and the production process is mature, but the structure of the pump head has hardly been substantially improved over the decades, and the pump head components have also hardly been changed.

[0004] The constituent materials of conventional pump heads may include multiple types such as plastics, metal springs, and glass beads, and there may also be multiple types of plastics. Multiple types of materials are inconvenient to recycle and reuse, are disadvantageous for material recycling, and are also disadvantageous for measures against environmental problems such as plastic pollution.

[0005] On the other hand, the structure and shape of the components can differ, and the performance of the pump head, which is composed of these components combined with other parts, can also vary. Currently, commonly used pump heads have many problems, such as poor airtightness if not used for a long period of time, spring elasticity significantly affecting operability, and insufficient dispensing volume per pump, making it impossible to dispense high-viscosity or high-concentration liquids. Improving operability and dispensing performance is a major means of improving product competitiveness.

[0006] As people's living standards improve and environmental awareness grows, there is a demand for the manufacture of pump heads and containers that are lower in cost, easier to recover, and perform better, as well as improved ease of use during retrieval and enhanced fluid extraction performance from pump heads. [Overview of the project] [Means for solving the problem]

[0007] To address the problems of the conventional pump heads described above, such as high manufacturing costs and poor performance, the present invention provides a cache fluid section, an opening, and a closed end. A pump head component having a and a bracket into which the pump head component is assembled. Equipped with Pump head To provide.

[0008] In this pump head, The opening is, the One end is connected to the cache fluid section, and the other end is connected to the closed end. The internal space between the cash liquid section and the opening is a liquid storage space. The liquid storage space is the One end Moves back and forth inside the cache liquid section. It is closed by a piston, and the other end is closed by a closing end. In the opening ,liquid An opening is provided for the body to enter and exit the liquid storage space. The sealing members are fixed to flange rings provided on both the axial sides of the opening, at the opening and the closed end, respectively. The cache fluid section is cylindrical, with a barrier ring and flange protruding outward on its exterior, and a smooth surface on its interior that engages with the piston. The bracket is provided with a liquid intake passage and an outlet passage, as well as a gas return passage, one end of which is open towards the inside of the bracket and the other end of which is configured to communicate with the inside of the container. When the piston is pulled axially outward from the pump head component, the pump head component moves axially outward until its flange contacts the chamfer on the inside of the bracket mounting opening. In response to this movement, the sealing member moves within the bracket, connecting the opening and the suction passage and opening the gas return passage. As the piston moves further axially outward relative to the pump head component, the liquid in the container is drawn from the suction passage through the opening into the storage space. When the piston is pressed axially inward into the pump head component, the pump head component moves axially inward until the barrier ring contacts the mounting opening of the bracket. In response to this movement, the sealing member moves within the bracket, connecting the opening and the outflow passage and closing the gas return passage. As the piston moves further axially inward relative to the pump head component, the liquid in the reservoir space is discharged through the opening and outflow passage. .

[0009] this Pump head The liquid storage space serves to temporarily store the liquid being drawn, and this liquid storage space is at one end Moves back and forth inside the cache liquid section. Because it is closed by a piston, liquid cannot enter or exit from this end, and the other end is closed by a closing end. The cache liquid section is directly connected to the opening and communicates with the internal space.

[0010] The opening is provided for the liquid being extracted to enter and exit the cache liquid section.

[0011] this Pump head In the opening Same Axial axis place Multiple openings may be provided in the device. By increasing the diameter of the openings that communicate with the external passage, blockage by highly concentrated and large-particle fluids can be prevented, and the loss of flow pressure can be reduced.

[0012] this Pump head In this case, the diameter of the opening at the opening is mouth Because it is smaller than the diameter, it forms annular or groove-shaped passage. in This will allow for smoother communication with external passageways.

[0013] this Pump head In this configuration, the axial centerlines of the cache fluid section, the opening, and the closed end coincide. Because the axial centerlines of the cache fluid section, the opening, and the closed end coincide, mechanical assembly with other pump head components is facilitated, and axial movement of the pump head components is also facilitated.

[0014] this Pump headIn this case, the cache liquid part is cylindrical, provided with a protruding part on the outside, and has a smooth surface that fits with the piston on the inside. Since the cache liquid part is cylindrical, processing and production are facilitated, and the capacity can be maximized. On the outside, a protruding part is provided that fits with a bracket or the like so as to limit the distance that the pump head part moves in the axial direction. The protruding part may be a specially provided barrier member, or the both ends of the cache liquid part may be used as barrier members, such as using the difference in diameter between the cache liquid part and the peripheral parts to use the both ends of the cache liquid part as barrier members. On the inside, due to the presence of a smooth surface that fits with the piston, the confidentiality of the pump head is ensured, and the function of delivering the liquid can be realized.

[0015] A smooth support surface parallel to the axis of the cache liquid part is provided on the local outer peripheral surface of this cache liquid part, and the support surface supports the entire reciprocating movement of the pump head part in the axial direction. The support surface includes the outer peripheral surface located on the cache liquid part and the outer peripheral surface located at the location where the cache liquid part and the opening are connected. In combination with a support member installed outside, the support surface supports the short-distance reciprocating movement of the pump head part in the axial direction and prevents the pump head part from swaying in places other than the axial direction. The smooth surface facilitates the support of the reciprocating movement of the pump head part in the axial direction.

[0016] This Pump head In this case, the Caliber of the cache liquid part Caliber is larger than that of the opening and the closed end. Since the Caliber of the cache liquid part is large, more liquid can be temporarily stored, and the pump head can take out more liquid at one time. Since the opening and the closed end Caliber are small, material, space, and assembly costs can be saved.

[0017] This Pump head In this case, the said opening of axial direction Both sides, with the opening and the closed end respectivelyA flange ring for fixing the seal member is provided. By installing it in this way, the number of seal parts can be reduced, the sealing effect can be ensured, and its movement in the axial direction can be facilitated.

[0018] This Pump head has a simple structure, is multifunctional, facilitates mass production, has no requirements for the product material, and can reduce production costs. Also, the parts that need to be compatible with this are simple, in small quantities, and easy to produce and assemble. Therefore, a mixing function that can only be achieved by a plurality of parts of the existing pump head can be realized.

[0020] The present invention also provides a container using the above pump head.

Advantages of the Invention

[0021] This pump head and container overcome various problems existing in the containers of the prior art, have advantages such as fewer component parts, easy assembly, good usability, the ability to take out high-viscosity and high-concentration contents, and high practicality. At the same time, since this pump head and container are made of a single material, they are easy to reuse and are advantageous for reducing the pressure on plastic pollution to the environment.

Brief Description of the Drawings

[0022] [Figure 1] Figure 1 is a cross-sectional view of the pump head described in Example 1. [Figure 2] Figure 2 is an exploded view of the pump head of Figure 1 described in Example 1. [Figure 3] Figure 3 is a cross-sectional view of the pump head described in Example 2. [Figure 4] Figure 4 is an exploded view of the pump head of Figure 3 described in Example 2. [Figure 5] Figure 5 is a cross-sectional view and an exploded view of the pump head described in Example 3. [Figure 6] Figure 6 is a perspective view and an exploded view of the pump head described in Example 3. [Figure 7] Figure 7 shows a cross-sectional view and an exploded view thereof of the pump head described in Example 4. [Figure 8] Figure 8 shows a three-dimensional view and an exploded view thereof of the pump head described in Example 4. [Modes for carrying out the invention]

[0023] Example 1 Figure 1 is a cross-sectional view of the pump head described in Embodiment 1. Figure 2 is an exploded view of Figure 1. The pump head comprises an axial moving component 1 (i.e., a pump head component), a piston 2, a sealing member 31, a sealing member 32, a liquid suction passage 4 and its outlet 41, an outflow passage 5 and its inlet 51, a bracket 6, and a connecting rod 21, a guide cover 22, and a container lid 8.

[0024] The axially moving component 1 comprises a cache fluid section 11, an opening 12, and a closed end 13. One end of the opening 12 communicates with the cache fluid section 11, and the other end is connected to the closed end 13. The cache fluid section 11 is cylindrical and has a barrier ring 16 and flange 17 protruding outward, and a smooth surface on the inside that engages with the piston 2. The internal space between the cache fluid section 11 and the opening 12 is a liquid storage space 14, which is closed at one end by the piston 2 and at the other end by the closed end 13. The opening 12 is provided with multiple openings 15 through which the liquid to be extracted passes each time it enters or leaves the liquid storage space 14. The barrier ring 16 and flange 17 are provided on the outside of the axially moving component 1, and a smooth support surface 18 parallel to the axial centerline of the cache fluid section is provided on the local outer peripheral side surface of the axially moving component 1.

[0025] Here, the axial centerlines of the cache fluid section 11, the opening 12, and the closed end 13 coincide. Multiple openings 15 are provided at the same axial position of the openings. A protruding barrier ring 16 and flange 17 are provided on the outside of the cache fluid section 11, and the protrusions, by fitting with the bracket 6, can limit the axial movement distance of the axially moving component 1. To support the entire axial reciprocating movement of the axially moving component 1, a support surface 18 is provided on the local outer surface of the axially moving component 1. Positions for attaching seals 31 and 32 are provided on both axial sides of the opening 15, and flange rings for fixing seals 31 and 32 are provided at these positions, where seal 32 is located at the closed end 13. Comparing the diameters, the diameter of the cache fluid section 11 is larger than the diameter of the opening 12, and the diameter of the opening 12 is larger than the diameter of the closed end 13. The guide cover 22 facilitates the linear movement of the connecting rod 21 and prevents it from swaying. The gas return passage 63 has one end that opens into the bracket 6 below the seal 32, and the other end that can communicate with the inside of the container lid 8.

[0026] By pulling the piston 2 to the outside of the axially moving component 1 with the connecting rod 21, the axially moving component 1 moves to the right, connecting the opening 15 and the liquid suction passage 4, and opening the gas return passage 63. If the piston 2 is continued to be pulled, the flange 17 is blocked by the chamfer on the inside of the right-side mounting opening of the bracket 6, the axially moving component 1 stops moving to the right, and if the piston 2 is continued to be pulled, the extracted liquid flows from the liquid suction passage 4 through the opening 15 into the liquid storage space 14.

[0027] The connecting rod 21 pushes the piston 2 into the axially moving component 1, causing the axially moving component 1 to move to the left, connecting the opening 15 and the outflow passage 5, and closing the gas return passage 63 by the seal 32. If the piston 2 is continued to be pushed, the barrier ring 16 is blocked by the mounting opening on the right side of the bracket 6, preventing the axially moving component 1 from moving to the left, and the piston 2 pushes out the liquid in the liquid storage space 14 so that it flows out to the outside through the opening 15 and the outflow passage 5.

[0028] The axial movement component 1 has a simple structure, is multifunctional, facilitates mass production, and has low requirements for product materials, thus reducing production costs. Furthermore, the parts that need to be fitted with it are simple and few in number, making production and assembly convenient.

[0029] The pump head described in Embodiment 1 of the present invention is a pump head manufactured by assembling axially moving components 1. In Embodiment 1, this pump head is attached to a container body capable of containing liquid via a container lid 8, forming a container using this pump head. Therefore, the pump head and container have the advantages of having few components, being easy to assemble, being easy to use, being able to dispense high viscosity or high concentration contents, and being highly practical. At the same time, the pump head and container are made of a single material, and both may be plastic, making plastic recycling and reuse easy.

[0030] Example 2 As shown in Figure 3, this is a cross-sectional view of the pump head described in Embodiment 2, and Figure 4 is an exploded view of Figure 3. The pump head comprises an axially moving component 1 (i.e., a pump head component), a piston 2, a sealing member 31, a sealing member 32, a liquid suction passage 4, an outlet passage 5, a bracket 6, and a connecting rod 21 and a cover 22.

[0031] The axially moving component 1 comprises a cache fluid section 11, an opening 12, and a closed end 13. One end of the opening 12 communicates with the cache fluid section 11, and the other end is connected to the closed end 13. The cache fluid section 11 is cylindrical and has a protruding convex shoulder 16 and chamfer 17 on the outside, and a smooth surface on the inside that fits with the piston 2. The internal space between the cache fluid section 11 and the opening 12 is a liquid storage space 14, which is closed at one end by the piston 2 and at the other end by the closed end 13. The opening 12 is provided with an opening 15 through which the liquid to be extracted passes each time it enters or leaves the liquid storage space 14. The axially moving component 1 has a protruding shoulder 16 and chamfer 17 on the outside, and a smooth support surface 18 parallel to the axis of the cache fluid section is provided on the local outer peripheral side surface of the axially moving component 1.

[0032] Here, the axial centerlines of the cache fluid section 11, the opening 12, and the closed end 13 coincide. Multiple openings 15 are provided at the same axial position of the opening 12. A convex shoulder 16 and a chamfer 17 are provided on the outside of the cache fluid section 11, and the convex shoulder 16 and chamfer 17 are fitted to the bracket 6 so as to limit the axial movement distance of the axially moving component 1. The axially moving component 1 has a support surface 18 on its local outer circumferential surface, and the support surface 18 supports the entire axial reciprocating movement of the axially moving component 1 on the bracket 6. Positions for attaching seals 31 and 32 are provided on both axial sides of the opening 15, where the seal 32 is located at the closed end 13. The opening is provided with flange rings for fixing sealing members to secure seals 31 and 32 to both axial sides. In terms of diameter, the diameter of the cache fluid section 11 is larger than that of the opening 12, and the diameter of the opening 12 is larger than that of the closed end 13.

[0033] By pulling the piston 2 to the outside of the axially moving component 1 with the connecting rod 21, the axially moving component 1 moves to the right, and the opening 15 and the outlet 41 of the liquid suction passage 4 are connected. If the piston 2 is continued to be pulled, the chamfer 17 is blocked by the flange on the outside of the right-side mounting opening of the bracket 6, preventing the axially moving component 1 from moving to the right, and if the piston 2 is continued to be pulled, the extracted liquid flows from the liquid suction passage 4 through the opening 15 into the liquid storage space 14.

[0034] When the connecting rod 21 pushes the piston 2 into the axially moving component 1, the axially moving component 1 moves to the left, and the opening 15 and the inlet 51 of the outflow passage 5 are connected. If the piston 2 is continued to be pushed, the convex shoulder 16 is blocked by the mounting opening on the right side of the bracket 6, preventing the axially moving component 1 from moving to the left, and the piston 2 pushes out the liquid in the liquid storage space 14 so that it flows out to the outside through the opening 15 and the outflow passage 5.

[0035] Similarly, the axial movement component 1 in this embodiment is a core component of the pump head that is simple in structure, multifunctional, and easy to mass-produce. It does not have high material requirements for the product, thus reducing production costs. Furthermore, the compatible parts are simple, few in quantity, and convenient for production and assembly.

[0036] The pump head described in Example 2 is a pump head equipped with an axially movable component 1. In Example 2, this pump head is attached to the body of the container by a container lid 10, forming the container. Both the pump head and the container using this pump head in Example 2 have the advantages of having few components, being easy to assemble, being easy to use, and being able to dispense high-viscosity and high-concentration contents, thus offering high practicality. At the same time, the pump head and the container can be made of a single material, both of which may be plastic, making plastic recycling and reuse easy.

[0037] Example 3 As shown in Figures 5 and 6, this is the pump head described in Embodiment 3. Figure 5 is a cross-sectional view and exploded view thereof of the pump head described in Embodiment 3, and Figure 6 is a three-dimensional view and exploded view thereof of the pump head described in Embodiment 3. The pump head comprises an axially moving component 1 (i.e., a pump head component), a piston 2, a sealing member 31, a sealing member 32, a liquid suction passage 4, an outlet passage 5, a bracket 6, and a connecting cover 21.

[0038] The axially moving component 1 comprises a cache fluid section 11, an opening 12, and a closed end 13. One end of the opening 12 communicates with the cache fluid section 11, and the other end is connected to the closed end 13. The cache fluid section 11 is cylindrical and has a protruding convex shoulder 16 on the outside and a smooth surface on the inside that fits with the piston 2. The internal space between the cache fluid section 11 and the opening 12 is a liquid storage space 14, which is closed at one end by the piston 2 and at the other end by the closed end 13. The opening 12 is provided with an opening 15 through which the liquid to be extracted passes each time it enters or leaves the liquid storage space 14. The diameter of the cache fluid section 11 in the axially moving component 1 is larger than that of the opening 12, forming the convex shoulder 16. A smooth support surface 18 parallel to the axis of the cache fluid section is provided on the local outer peripheral side surface where the cache fluid section 11 and the opening 12 are connected. The diameter of the circular hole 61 in the center of the bracket 6 is slightly larger than the diameter of the connection point between the cache liquid section 11 and the opening 12. After the axially moving component 1 passes through the circular hole 61 and is attached to the bracket 6, flange rings are provided on both axial sides of the opening 15, namely the opening 12 and the closed end 13, respectively, to fix the sealing members 31 and 32. The system also includes an outlet 41 for the liquid suction passage 4 and an inlet 51 and outlet 52 for the outflow passage 5.

[0039] In this embodiment, the axial centerlines of the cache fluid section 11, the opening 12, and the closed end 13 coincide. Multiple openings 15 are provided at the same axial position of the opening 12. A convex shoulder 16 is formed on the outside of the cache fluid section 11, and the convex shoulder 16 and the sealing member 31 are fitted to the bracket 6 in order to limit the axial movement distance of the axially moving component 1. A support surface 18 is provided on the local outer peripheral side surface where the cache fluid section 11 and the opening 12 are connected, and the support surface 18 ensures the entire axial reciprocating movement of the axially moving component 1 on the bracket 6. Positions for attaching sealing members 31 and 32 are provided on both axial sides of the opening 15, where the sealing member 32 is located at the closed end 13. The diameter of the cache fluid section 11 is larger than that of the opening 12, and the diameter of the opening 12 is larger than that of the closed end 13.

[0040] When the connecting cover 21 pulls the piston 2 to the outside of the axially moving component 1, the axially moving component 1 moves upward as a whole, and the opening 15 and the liquid suction passage 4 come into contact. After the sealing member 31 is blocked by the partition plate 62 in the center of the bracket 6, the axially moving component 1 stops moving upward, and the suction force of the negative pressure created by the piston 2 causes the liquid to flow from the liquid suction passage 4 through the opening 15 into the liquid storage space 14.

[0041] When the connecting cover 21 pushes the piston 2 into the interior of the axially moving component 1, the axially moving component 1 moves downward as a whole, and the opening 15 and the outflow passage 5 come into contact. After the convex shoulder 16 is blocked by the partition plate 62 in the center of the bracket 6, the axially moving component 1 stops moving downward, and the piston 2 pushes out the liquid in the liquid storage space 14 so that it flows out to the outside through the opening 15 and the outflow passage 5.

[0042] Similarly, the axial movement component 1 in this embodiment has a simple structure, is multifunctional, and is easy to mass-produce. There are no material requirements for the product, which can reduce production costs. Furthermore, the parts that need to be fitted with it are simple, few in number, and convenient for production and assembly.

[0043] Example 4 As shown in Figures 7 and 8, this is the pump head described in Embodiment 4. Figure 7 is a cross-sectional view and exploded view thereof of the pump head described in Embodiment 4, and Figure 8 is a three-dimensional view and exploded view thereof of the pump head described in Embodiment 4. The pump head comprises an axially moving component 1 (i.e., a pump head component), a piston 2, a liquid suction passage 4, an outlet passage 5, a bracket 6, and a connecting rod 21 and a cover 22.

[0044] The axial movement component 1 comprises a cache fluid section 11, an opening 12, and a closed end 13. One end of the opening 12 communicates with the cache fluid section 11, and the other end is connected to the closed end 13. The cache fluid section 11 is cylindrical and has outwardly protruding barrier rings 16 and 17, and an inwardly smooth surface that engages with the piston 2. The internal space between the cache fluid section 11 and the opening 12 is a liquid storage space 14, which is closed at one end by the piston 2 and at the other end by the closed end 13. The opening 12 is provided with an opening 15 through which the liquid to be extracted passes each time it enters or leaves the liquid storage space 14. The axial movement component 1 has barrier rings 16 and 17 on its exterior, and a smooth support surface 18 parallel to the axis of the cache fluid section is provided on the local outer peripheral side surface of the axial movement component 1. The bracket 6 supports the support surface 18 and supports the entire axial reciprocating movement of the axial movement component 1. The diameter of the cache liquid section 11 is larger than the opening 12 and the closed end 13, and the diameter of the opening 12 is the same as the diameter of the closed end 13.

[0045] Here, the axial centerlines of the piston, the cache fluid section 11, the opening 12, and the closed end 13 coincide. Multiple openings 15 are provided at the same axial position of the opening. The cache fluid section 11 is provided with barrier rings 16 and 17 on its outside, and the barrier rings 16 and 17 are fitted into the bracket 6 to limit the axial movement distance of the axially moving component 1. A support surface 18 is provided on the local outer circumferential surface of the axially moving component 1 to support the entire axial reciprocating movement of the axially moving component 1.

[0046] The circular frame 7 has outlets 41 for the liquid suction passage 4 and inlets 51 for the outflow passage 5 on both sides, with the inlet 51 of the outflow passage 5 located on the outside. The inner circumferential side surface of the frame 7 is provided with a position for attaching a sealing member 31. The sealing member 31 allows the opening and closing end of the axially moving component 1 to reciprocate, and prevents mixing by closing the gap between the outlet 41 of the liquid suction passage 4 and the inlet 51 of the outflow passage 5. After attaching the opening 12 and closing end 13 of the axially moving component 1 to the frame 7, the attachment points are sealed with the sealing member 32. The cover 22 prevents shaking by facilitating the linear movement of the connecting rod 21.

[0047] When the connecting rod 21 pulls the piston 2 to the outside of the axially moving component 1, the axially moving component 1 moves to the right, and the opening 15 and the liquid suction passage 4 are connected. When the piston 2 is continued to be pushed, the barrier ring 17 is blocked by the bracket 6, the axially moving component 1 stops moving to the right, and when the piston 2 is pulled, the extracted liquid flows from the liquid suction passage 4 through the opening 15 into the liquid storage space 14.

[0048] When the connecting rod 21 pushes the piston 2 into the axially moving component 1, the axially moving component 1 moves to the left, and the opening 15 and the outflow passage 5 are connected. If the piston 2 is continued to be pushed, the barrier ring 16 is blocked by the bracket 6, the axially moving component 1 stops moving to the left, and the piston 2 pushes the liquid in the liquid storage space 14 out through the opening 15 and the outflow passage 5 to the outside.

[0049] While embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, alterations, and combinations can be made to these embodiments without departing from the principles and spirit of the invention. The scope of the present invention is limited by the appended claims and equivalents.

Claims

1. A pump head for extracting liquid from a container containing liquid, comprising a pump head component having a cache liquid section, an opening, and a closed end, whose respective axial centerlines overlap, and a bracket for mounting the pump head component via a mounting port so as to be reciprocally movable in the axial direction, The opening has one end connected to the cache fluid section and the other end connected to the closed end. The internal space between the aforementioned cache liquid section and the opening is a liquid storage space. The liquid storage space is closed at one end by a piston that moves back and forth inside the cash liquid section, and the other end is closed by the closing end. The opening is provided for liquid to enter and exit the liquid storage space, and sealing members are fixed to flange rings provided on both sides of the opening in the axial direction, at the opening and the closed end, respectively. The aforementioned cache fluid section is cylindrical, and its outer surface is provided with a barrier ring and flange that protrude outward, while its inner surface has a smooth surface that engages with the piston. The bracket is provided with a liquid intake passage and an outlet passage, and also with a gas return passage, one end of which is open toward the inside of the bracket and the other end of which is configured to communicate with the inside of the container. When the piston is pulled axially outward from the pump head component, the pump head component moves axially outward until the flange contacts the chamfer on the inside of the bracket mounting opening, and in response to this movement, the sealing member moves within the bracket, thereby connecting the opening and the suction passage and opening the gas return passage, and the piston moves further axially outward relative to the pump head component, thereby drawing the liquid in the container from the suction passage through the opening into the liquid storage space. A pump head characterized in that when the piston is pressed axially inward of the pump head component, the pump head component moves axially inward until the barrier ring contacts the mounting opening of the bracket, the sealing member moves within the bracket in response to this movement so that the opening and the outflow passage are in communication and the gas return passage is closed, and the piston moves further axially inward relative to the pump head component so that the liquid in the storage space is discharged through the opening and outflow passage.

2. The pump head according to claim 1, characterized in that a plurality of openings are provided at positions in the same axial direction as the openings.

3. The pump head according to claim 1, characterized in that a smooth support surface parallel to the axis of the cache fluid portion is provided on the local outer surface of the cache fluid portion.

4. The pump head according to claim 1, characterized in that the diameter of the cache liquid portion is larger than the diameter of the opening and the closed end, and the diameter of the opening is larger than the diameter of the closed end.

5. A container characterized by comprising a pump head according to any one of claims 1 to 4.

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