WO2022127836A1

WO2022127836A1 - Pump head and container

Info

Publication number: WO2022127836A1
Application number: PCT/CN2021/138462
Authority: WO
Inventors: 陈增新; 李生录; 夏建松; 李陈; 魏晋霞; 周长春; 魏海明; 陈京哲; 陈斌
Original assignee: 北京红海科技开发有限公司
Priority date: 2020-12-15
Filing date: 2021-12-15
Publication date: 2022-06-23

Abstract

A pump head, comprising a piston (2) and a liquid suction channel (4), and further comprising an axial motion combination (1), an outflow channel (5), sealing components (31, 32), and a support (6). The axial motion combination (1) comprises a liquid buffer portion assembly (11) and a closed end assembly (12). The liquid buffer portion assembly (11) is connected to the closed end assembly (12), and an opening (15) is formed after the connection. The liquid buffer portion assembly (11) and the closed end assembly (12) are located on two sides of the opening (15). The internal space of the liquid buffer part assembly (11) is a liquid storage space (14), and the liquid storage space (14) is communicated with the opening (15). One end of the liquid storage space (14) is closed by the piston (2), and the other end is closed by the closed end assembly (12). Also provided is a container using the pump head. The container is simple in structure, sturdy and durable, and has less pressure drop, better sealing performance and a larger single take-out amount; contents can be quantitatively taken out, so that the contents are prevented from being oxidized and polluted; the environmental pollution is reduced. The present invention is suitable for containing daily necessities, foods and drugs.

Description

A pump head and container

technical field

The present invention relates to a pump head and a container, in particular to a pump head which is easy to assemble, easy to use, and can take out the contents in a large capacity, and a container using the pump head.

Background technique

The pump head is a product that people often use. The existing pump head has many components, and the material cost and assembly cost occupy a large proportion in the production cost. However, reducing the number of components requires restructuring the pump head structure, and the research and development cost of the restructuring structure is high, so few people are willing to try it. Therefore, although the pump head technology is a traditional technology, widely used, and the production process is mature, the pump head structure has rarely been substantially improved for decades.

There may be various materials for the existing pump head, such as plastics, metal springs, glass beads, and various plastics. It is inconvenient to reuse a variety of materials after recycling, which is not conducive to the recycling of materials, and is not conducive to the management of environmental problems such as plastic pollution.

There are still many functional problems with the commonly used pump heads, such as the air tightness is not easy to maintain for a long time, the large spring force affects the controllability, the single extraction volume is too small, and the liquid with high viscous consistency cannot be extracted, etc. The existing structure of the pump head also Tried to solve, but the effect is not obvious.

With the improvement of people's living standards, people need pump heads and containers with lower manufacturing costs, convenient recycling and better performance, which can improve the operating feel during the taking process and improve the performance of the pump head for taking out fluids.

SUMMARY OF THE INVENTION

In order to solve the above-mentioned problems in the prior art, the present invention provides a pump head, which includes a piston and a liquid suction channel, and also includes an axial movement combination, an outflow channel, a sealing member and a bracket;

Axial movement combination, including the buffer liquid part assembly and the closed end assembly; the buffer liquid part assembly is connected with the closed end assembly, and an opening is formed after the connection; the buffer liquid part assembly and the closed end assembly are located on both sides of the opening; here the buffer liquid part assembly The fact that the closed end assembly is located on both sides of the opening means that the liquid buffer part assembly and the closed end assembly are connected in a straight line, not at a right angle.

The internal space of the liquid storage part assembly is a liquid storage space, and the liquid storage space is communicated with the opening; if the liquid storage part assembly is connected with the closed end assembly through a communication piece, the liquid storage space also includes the internal space of the communication piece.

One end of the liquid storage space is closed by the piston, and the other end is closed by the closed end assembly;

According to the distance from the piston from near to far, the outlet of the suction channel and the inlet of the outflow channel are sequentially distributed on the side of the opening stroke, and can be communicated with the opening respectively;

The sealing part seals the gap at the joint when the opening is communicated with the outlet of the suction channel or the inlet of the outflow channel;

The movement distance of the opening when it communicates with the outlet of the suction channel and the inlet of the outflow channel respectively is the maximum distance of the reciprocating axial movement of the combination of axial movements;

The bracket prevents the axial movement combination from continuing to move after the opening communicates with the outlet of the suction channel or the inlet of the outflow channel.

The liquid storage space combined by the axial movement has the function of temporarily storing the liquid to be taken out. One end of the liquid storage space will be closed by the external piston, and the liquid will not enter and exit from this end; the other end is closed by the closed end assembly. The connection method between the buffer liquid part assembly and the closed end assembly includes but is not limited to screw connection, snap connection, and the like. The liquid storage space communicates with the opening, and the liquid enters and exits the liquid storage space through the opening. The bracket supports the axial movement combination for axial movement, and limits the distance of the axial movement combination movement.

This axial movement combination has a simple structure and is easy to assemble, which is beneficial to mass production and can reduce production costs; the components matched with it are simple and small in number, which is convenient for production and assembly; Hybrid function.

The pump head and the liquid storage part assembly can also be connected with the closed end assembly through a communication piece, and the sealing member is arranged on the communication piece. The middle of the connecting piece can pass through the buffer liquid part component and the opening, and the outer side can be provided with a sealing part, which is convenient for mold production and mechanized assembly.

With this pump head, the closed-end assembly and/or the connecting member can be produced integrally with the sealing member, respectively. The use of closed-end components and connecting parts that are integrated with the sealing components, not only reduces the number of components, facilitates mold production and mechanized assembly, but also ensures the sealing effect.

In this pump head, the axis lines of the piston, the liquid buffer component, the closed end component and the sealing component are coincident, so as to facilitate the mechanical assembly and facilitate the axial movement of the axial movement combination.

In this pump head, the sealing member can be arranged on the inside of the frame between the suction channel and the outflow channel. Such a frame may be a ring-shaped structure, isolating the suction channel and the outflow channel. This sealing method in which the opening moves and the sealing member (or part of the sealing member) does not move can reduce the number of sealing members and reduce the movement resistance.

In this pump head, the sealing parts can be arranged on both sides of the opening in the axial direction. This sealing method is easy to assemble, and it is convenient for axial movement combined with short-distance axial movement.

With this pump head, the main body of the outflow channel can be located on the side of the opening of the pump head. The outlet of the outflow channel of the existing pump head is located at the top of the pump head, and is mostly set independently, which wastes materials and space; if it is arranged on the opening side of the pump head, the outflow channel does not need to go around the whole pump head, and the length of the outflow channel is reduced. The length of the main body of the outflow channel is short, which can reduce the pressure loss of the process, save materials, and reduce the space occupied by the pump head.

In this pump head, a protruding part can be provided on the outer side of the liquid storage part assembly, and the protruding part cooperates with the bracket and can limit the axial movement distance of the axial movement combination. The protruding part can be a specially provided blocking member, or it can be the difference in diameter between the liquid buffer part assembly and each part, and the two ends of the buffer liquid part assembly are used as blocking members.

In this pump head, the partial outer peripheral surface of the liquid storage part assembly (including the outer peripheral surface of the main body of the liquid storage part or the outer peripheral surface of the connection between the liquid storage part and the connecting part and the closed end assembly) can be arranged parallel to the liquid storage part assembly. The smooth supporting surface of the axis, the supporting surface supports the overall axial reciprocating movement of the axial movement combination. The support surface may be located on the outer peripheral surface of the liquid storage part assembly or the closed end assembly. After being combined with the support, the smooth support surface supports the axial movement combination to move back and forth in a short distance, preventing the non-axial shaking of the axial movement combination.

In this pump head, the bracket can be arranged in the radial groove on the axial movement combination. Using the groove formed by the difference in the diameter of each part of the axial movement combination to set the bracket has several advantages: the bracket can better stabilize the axial movement combination and prevent non-axial movement; the groove surface can be used as one of the supporting surfaces to help In order to keep it smooth; the bracket utilizes both sides of the groove to prevent the axial movement combination from continuing to move after the opening is communicated with the outlet of the suction channel or the inlet of the outflow channel without additional facilities.

In this pump head, the air inlet of the return air passage is closed by a sealing member, and when the piston is pulled out to absorb the liquid, the sealing member is removed from the air inlet. Set the air inlet of the return air channel at the position sealed by the sealing part, and open the air inlet only when the liquid suction sealing part is removed, which can not only ensure the air return when the container needs to be supplemented, but also avoid the liquid to be taken to the greatest extent. This volatilization prevents outside air from entering the container to oxidize or contaminate the liquid.

The present invention also relates to a container, which comprises a container body, and is characterized in that it further comprises the pump head of the above-mentioned invention.

The pump head and container overcome various problems existing in the prior art container, and have the advantages of less components, convenient assembly, convenient use, the ability to take out the contents with high viscosity and consistency, large single take-out amount, and strong practicability. Etc. At the same time, the material of the pump head and the container is relatively single, which is convenient for recycling, which is beneficial to reduce the pressure of plastics on environmental pollution.

Description of drawings

Fig. 1 is the sectional view of the pump head described in Embodiment 1 and its exploded view;

Fig. 2 is the perspective view of the pump head described in Example 1 and its exploded view;

3 is a sectional view of the pump head described in Embodiment 2 and an exploded view thereof;

4 is a perspective view of the pump head described in Embodiment 2 and an exploded view thereof;

5 is an exploded view of a cross-sectional view of the pump head described in Example 3;

6 is an exploded view of a perspective view of the pump head of Example 3. FIG.

Detailed ways

Example 1

As shown in Figures 1 and 2, it is a pump head according to Embodiment 1 of the present invention. 1 is a cross-sectional view of the pump head according to Embodiment 1 and an exploded view thereof, and FIG. 2 is a perspective view of the pump head according to Embodiment 1 and an exploded view thereof. The pump head includes an axial movement assembly 1 , a piston 2 , a sealing part 31 , a sealing part 32 , a suction channel 4 , an outflow channel 5 , a bracket 6 , and a connection cover 21 .

The axial movement assembly 1 includes a buffer liquid part assembly 11 and a closed end 12; the buffer liquid part assembly 11 and the closed end assembly 12 are inserted and connected to form a plurality of openings 15; the internal space of the buffer liquid part assembly 11 is a liquid storage space 14 , the liquid storage space 14 is communicated with the opening 15; one end of the liquid storage space 14 is closed by the piston 2, and the other end is closed by the closed end assembly 12; according to the distance from the piston 2 from near to far, the outlet 41 of the suction channel 4 The inlets 51 and the outflow channel 5 are sequentially distributed on the stroke side of the opening 15 and can be communicated with the opening 15 respectively; the two axial sides of the opening 15, that is, the outer peripheral sides of the closed end assembly 12 and the buffer liquid part assembly 11 are respectively installed with sealing

members

32 and 15. The sealing member 31, the two sealing members can seal the gap at the joint when the opening 15 is communicated with the outlet 41 of the suction channel or the inlet 51 of the outflow channel; the bracket 6 supports the axial movement of the combination 1 to move axially; the opening 15 is in the The movement distance when communicating with the outlet 41 of the suction channel 4 and the inlet 51 of the outflow channel 5 respectively is the maximum distance of the reciprocating axial movement of the axial movement combination; the bracket 6 can prevent the axial movement combination 1 from being at the opening 15 and The outlet 41 of the suction channel 4 or the inlet 51 of the outflow channel 5 is connected and continues to move.

The diameter of the main body of the liquid buffer component 11 of the axial movement component 1 is large, and the diameter of the connecting end with the closed end component 12 is small, forming a shoulder 16 . A smooth support surface 18 parallel to the axis of the liquid buffer part assembly is provided on the partial outer peripheral side of the connecting end of the liquid buffer part assembly 11 with a smaller diameter. The diameter of the middle garden hole 61 of the bracket 6 is slightly larger than the diameter of the connecting end of the liquid buffer component 11. After the liquid buffer component 11 is installed on the bracket 6 through the garden hole 61, the other end is connected to the closed end component 12, and then the sealing member 31 is installed. and sealing member 32. The outlet 41 of the suction channel 4 and the inlet 51 of the outflow channel 5 are arranged on the frame, and the outlet 52 of the outflow channel 5 is installed on the bracket 6 .

In this embodiment, the piston 2 , the buffer liquid part assembly 11 , the sealing member 31 , the sealing member 32 and the closed end assembly 12 coincide with the axis lines. A shoulder 16 is formed on the outside of the buffer liquid part assembly 11 , and the shoulder 16 and the sealing member 31 cooperate with the middle baffle 62 of the bracket 6 to limit the axial movement distance of the axial movement assembly 1 . The smooth support surface 18 ensures the overall axial reciprocating movement of the axial movement assembly 1 on the bracket 6 . In terms of caliber, the caliber of the main body of the liquid buffer component 11 is larger than the caliber of the closed end component 12 . The main body of the outflow channel 5 is located on the side of the opening 15 of the pump head, and the connection cover 21 is located on the upper side of the pump head.

The piston 2 is pulled to the outside of the axial movement assembly 1 through the connecting cover 21, and the axial movement assembly 1 moves upward as a whole, so that the opening 15 is communicated with the suction channel 4; after the sealing member 31 is blocked by the intermediate baffle 62 of the bracket 6, the axial movement The moving assembly 1 no longer moves upward; under the pulling of the negative pressure formed by the piston 2 , the liquid to be taken enters the liquid storage space 14 from the liquid suction channel 4 through the opening 15 .

The piston 2 is pressed into the axial movement assembly 1 through the connecting cover 21, and the axial movement assembly 1 moves downward as a whole, so that the opening 15 is communicated with the outflow channel 5; after the shoulder 16 is blocked by the intermediate baffle 62 of the bracket 6, the axial The moving assembly 1 no longer moves downward, and the piston 2 pushes the liquid in the liquid storage space 14 to flow out from the outflow channel 5 through the opening 15 .

The pump head of this embodiment has a simple structure, has no requirements on product materials, and can reduce production costs; the components matched with it are simple and small in number, which is convenient for production and assembly. It has the advantages of good air tightness, strong controllability, large volume taken out in a single time, and the ability to take out viscous and thick liquids.

In this embodiment, only the closed end assembly 12 has a plurality of openings before the two assemblies of the buffer liquid part assembly 11 and the closed end assembly 12 are assembled, and the plurality of openings form a plurality of openings 15 when connected and assembled. The forming method of the opening also includes: only one component has an opening before the connection, and the opening forms an opening after the combination; both components have an opening before the connection, and the new shape opening formed after the combination is an opening, etc.

Example 2

As shown in FIG. 3 and FIG. 4 , it is a pump head according to Embodiment 2 of the present invention. 3 is a cross-sectional view of the pump head according to Embodiment 2 and an exploded view thereof, and FIG. 4 is a perspective view of the pump head according to Embodiment 2 and an exploded view thereof. The pump head includes an axial movement component 1 , a piston 2 , a suction channel 4 , an outflow channel 5 , a bracket 6 , a frame 7 , a fastener 8 , a connection cover 21 , and a spring 22 .

The axial movement assembly 1 includes a buffer liquid part assembly 11, a closed end 12 and a communication member 13; the buffer liquid part assembly 11 is inserted and connected with the communication member 13; the communication member 13 is inserted into the closed end assembly 12 and connected to form an opening. 15; The internal space of the liquid storage part assembly 11 is a liquid storage space 14, and the liquid storage space 14 is communicated with the opening 15; one end of the liquid storage space 14 is closed by the piston 2, and the other end is closed by the closed end assembly 12; In order from near to far, the outlet of the suction channel 4 and the inlet of the outflow channel 5 are sequentially distributed on both sides of the stroke of the opening 15, and can communicate with the opening 15; the closed end assembly 12 and the outer peripheral side of the connecting member 13 both contain sealing parts , the two sealing parts can seal the gap at the joint when the opening 15 is communicated with the outlet of the suction channel or the inlet of the outflow channel; the closed end assembly 12 and the connecting part 13 are produced in an integrated manner with the sealing part; the bracket 6 supports the axial The movement combination 1 moves axially; the movement distance of the opening 15 when it communicates with the outlet of the suction channel 4 and the inlet of the outflow channel 5 respectively is the maximum distance of the reciprocating axial movement of the axial movement combination; the bracket 6 can prevent the shaft The movement combination 1 continues to move after the opening 15 communicates with the outlet of the suction channel 4 or the inlet of the outflow channel 5 .

The diameter of the buffer liquid part assembly 11 of the axial movement assembly 1 is larger than the diameter of the communication piece 13 , forming a shoulder 16 . A smooth support surface 18 parallel to the axis of the buffer liquid part assembly is provided on a part of the outer peripheral side of the connection between the buffer liquid part assembly 11 and the communication piece 13 . The diameter of the circular hole 61 in the middle of the bracket 6 is slightly larger than the diameter of the connection between the buffer liquid part assembly 11 and the connecting piece 13. After the buffer liquid part assembly 11 is installed on the bracket 6 through the round hole 61, the connecting piece 13 and the connecting piece 13 are connected at the other end in turn. Closed end assembly 12 . In addition, the pump head also includes a frame 7 , a fastener 8 , and an outlet 51 of the outflow channel 5 .

In this embodiment, the axis lines of the communicating member 13 and the closed end assembly 12 are coincident. A plurality of openings 15 are provided at the same axial position where the communication piece 13 connects with the closed end assembly 12 . A shoulder 16 is formed on the outer side of the liquid buffer component 11 , and the shoulder 16 and the communicating piece 13 cooperate with the middle baffle 62 of the bracket 6 to limit the axial movement distance of the axial movement component 1 . The smooth support surface 18 ensures the overall axial reciprocating movement of the axial movement assembly 1 on the bracket 6 . In terms of caliber, the caliber of the liquid buffer component 11 is larger than the calibers of the communicating member 13 and the closed-end component 12 . The main body of the outflow channel 5 is located on the side of the opening 15 of the pump head, and the connection cover 21 is located on the upper side of the pump head.

The spring 22 drives the connecting cover 21 to pull the piston 2 to the outside of the axial movement assembly 1, and the axial movement assembly 1 moves upward as a whole, so that the opening 15 is communicated with the suction channel 4; The axial movement assembly 1 no longer moves upward; under the pulling of the piston 2 to form a negative pressure, the liquid to be taken enters the liquid storage space 14 from the liquid suction channel 4 through the opening 15 .

Likewise, the pump head of this embodiment has a simple structure, which can reduce the production cost; the components matched with the pump head are simple and few in number, which is convenient for production and assembly. It has the advantages of good air tightness, strong controllability, large volume taken out in a single time, and the ability to take out viscous and thick liquids.

In this embodiment, there are openings respectively before the connecting member 13 and the closed end assembly 12 are assembled, and the openings overlap to form the opening 15 when they are connected and assembled. The openings are formed in the following manner: only one component has an opening before the connection, and the opening is an opening after the combination; both components have an opening before the connection, and the new-shaped opening formed after the combination is an opening, etc.

Example 3

As shown in FIG. 5 and FIG. 6 , it is a pump head according to Embodiment 3 of the present invention. 5 is an exploded view of a cross-sectional view of the pump head according to Embodiment 3, and FIG. 6 is an exploded view of a perspective view of the pump head according to Embodiment 3. FIG. The pump head includes an axial movement component 1 , a piston 2 , a suction channel 4 , an outflow channel 5 , a bracket 6 , a spring 9 , a container cover 10 , a connecting rod 21 , and a guide cover 22 .

The axial movement assembly 1 includes a buffer liquid part assembly 11 and a closed end 12; the buffer liquid part assembly 11 and the closed end assembly 12 are inserted and connected to form a plurality of openings 15; the internal space of the buffer liquid part assembly 11 is a liquid storage space 14 , the liquid storage space 14 is communicated with the opening 15; one end of the liquid storage space 14 is closed by the piston 2, and the other end is closed by the closed end assembly 12; according to the distance from the piston 2 from near to far, the outlet 41 of the suction channel 4 The inlets 51 and the outflow channel 5 are sequentially distributed on the side of the stroke of the opening 15 and can be communicated with the opening 15 respectively; both sides of the opening 15, that is, the outer peripheral side of the connection between the closed end assembly 12 and the buffer liquid part assembly 11 are respectively provided with sealing parts, The two sealing parts can seal the gap at the joint when the opening 15 communicates with the outlet 41 of the suction channel or the inlet 51 of the outflow channel; the two sealing parts are produced integrally with the closed end assembly 12 and the connecting piece 13 respectively. The bracket 6 supports the axial movement of the axial movement combination 1; the maximum distance; the bracket 6 can prevent the axial movement combination 1 from continuing to move after the opening 15 communicates with the outlet 41 of the suction channel 4 or the inlet 51 of the outflow channel 5 .

On the bracket 6 below the sealing member of the closed end assembly 12, a return air passage 63 is provided. The air inlet end of the return air passage 63 is arranged in the bracket 6, and the air outlet end is communicated in the screw cap 10 and can be communicated with the inside of the container. The air inlet end of the return air passage 63 is usually pressed by the sealing member of the closed end assembly 12, and only when the piston 2 moves to the right during suction, the closed end assembly 12 is opened when the closed end assembly 12 moves to the right.

On the left side of the axial movement assembly 1, ie the left side of the closed end assembly 12, a spring 9 is provided. When taking the liquid, the piston 2 moves to the left, and the spring 9 is compressed; after the liquid taking is completed, the pressure disappears, the spring 9 recovers, and pushes the axial movement combination 1 to move slightly to the right, and the liquid in the outflow channel 5 flows back slightly, preventing outflow There is liquid dripping at the outlet of channel 5. The main body of the outflow channel 5 is located on one side of the opening 15 of the pump head, and the connecting rod 21 is located on the other side of the opening 15 of the pump head.

A blocking ring 16 and a protrusion 17 are provided on the outer peripheral side of the liquid storage part assembly 11 of the axial movement assembly 1 . A smooth support surface 18 parallel to the axis of the liquid storage part assembly is provided between the blocking ring 16 and the protrusion 17 . A convex rib is provided at the installation opening on the right side of the bracket 6 . After the buffer liquid part assembly 11 and the closed end assembly 12 are connected, they are installed into the bracket 6 on the right side of the spring 9 . The protruding rib at the mounting opening of the bracket 6 is located outside the supporting surface 18 between the blocking ring 16 and the protrusion 17 . The outlet 41 of the suction channel 4 and the inlet 51 of the outflow channel 5 are arranged on the holder 6 .

In this embodiment, the axis lines of the piston 2, the buffer liquid part assembly 11 and the closed end assembly 12 are coincident. The blocking ring 16 and the protrusion 17 cooperate with the mounting opening of the bracket 6 to limit the axial movement distance of the axial movement assembly 1 . The smooth support surface 18 ensures the overall axial reciprocating movement of the axial movement assembly 1 on the bracket 6 .

The piston 2 is pulled to the outside of the axial movement assembly 1 through the connecting rod 21, and the axial movement assembly 1 moves to the right as a whole, so that the opening 15 is communicated with the suction channel 4; The axial movement assembly 1 no longer moves to the right; under the pulling of the negative pressure formed by the piston 2 , the liquid to be taken enters the liquid storage space 14 from the liquid suction channel 4 through the opening 15 .

The piston 2 is pressed into the axial movement assembly 1 through the connecting cover 21, and the axial movement assembly 1 moves to the left as a whole, so that the opening 15 is communicated with the outflow channel 5; after the blocking ring 16 is blocked by the mounting opening of the bracket 6, the axial movement assembly 1 no longer moves to the left, the piston 2 pushes the liquid in the liquid storage space 14 to flow out from the outflow channel 5 through the opening 15 .

The pump head of the present embodiment has a simple structure, has no requirements on product materials, and can reduce production costs; the components matched with it are simple and small in number, which is convenient for production and assembly. It has the advantages of good air tightness, strong controllability, large volume taken out in a single time, and the ability to take out viscous and thick liquids.

In this embodiment, before the two components of the buffer liquid part assembly 11 and the closed end assembly 12 are combined, only the buffer liquid part assembly 11 has a plurality of openings, and the plurality of openings form a plurality of openings 15 when connected and combined.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention , variants and combinations. The scope of the invention is defined by the appended claims and their equivalents.

Claims

A pump head, comprising a piston and a liquid suction channel, is characterized in that it further comprises an axial movement combination, an outflow channel, a sealing member and a bracket;

The axial movement combination includes a buffer liquid part assembly and a closed end assembly; the buffer liquid part assembly is connected with the closed end assembly, and an opening is formed after the connection; the buffer liquid part assembly and the closed end assembly are located at the both sides of the opening;

The internal space of the liquid storage part assembly is a liquid storage space, and the liquid storage space is communicated with the opening;

One end of the liquid storage space is closed by the piston, and the other end is closed by the closed end assembly;

According to the distance from the piston from near to far, the outlet of the suction channel and the inlet of the outflow channel are sequentially distributed on the side of the opening stroke, and can be communicated with the opening respectively;

The sealing member seals the gap at the joint when the opening is communicated with the outlet of the suction channel or the inlet of the outflow channel;

The movement distance of the opening when it communicates with the outlet of the suction channel and the inlet of the outflow channel respectively is the maximum distance of the reciprocating axial movement of the axial movement combination;

The bracket prevents the axial movement combination from continuing to move after the opening communicates with the outlet of the suction channel or the inlet of the outflow channel.
The pump head according to claim 1, characterized in that the liquid storage part assembly is connected with the closed end assembly through a communication member, and the sealing member is provided on the communication member.
3. The pump head according to claim 2, characterized in that the closed end assembly and/or the communicating member are respectively produced integrally with the sealing member.
The pump head according to claim 1, characterized in that the axis lines of the piston, the liquid buffer part assembly, the closed end assembly and the sealing member are coincident.
The pump head of claim 1, wherein the outflow channel body is located on the open side of the pump head.
The pump head according to claim 1, wherein a smooth supporting surface parallel to the axis of the liquid buffer part assembly is provided on the partial outer side surface of the liquid buffer part assembly.
The pump head according to claim 1, characterized in that a protruding part is provided on the outer side of the liquid storage part assembly.
The pump head of claim 1, wherein the bracket is arranged in a radial groove on the axial movement assembly.
The pump head according to claim 1, wherein the sealing member is provided on both sides of the opening in the axial direction.
A container, comprising a container body, is characterized in that it further comprises the pump head of any one of claims 1-9.