CN212912131U

CN212912131U - Pump head structure for cosmetic container

Info

Publication number: CN212912131U
Application number: CN202021008867.9U
Authority: CN
Inventors: 金钟声
Original assignee: Shanghai Jinyuan Cosmetics Co ltd
Current assignee: Shanghai Jinyuan Cosmetics Co ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-04-09
Anticipated expiration: 2030-06-05

Abstract

The utility model provides a pump head structure for cosmetic container, including according to head, pump assembly and bottle lid, the pump assembly includes the elastomer, prevents against the current pole and pump shell, and the elastomer forms into both ends open-ended and holds the chamber, prevents against the current pole axial run through set up in the inside that holds the chamber and with the both ends opening part sealing connection who holds the chamber, the one end and the according to the headtotail of elastomer, the other end embedding pump shell's of elastomer inside. The utility model discloses a simplify the pump package spare into the elastomer, prevent against current pole and the three essential element of pump shell, the elastomer has played the effect of spring promptly, can also with prevent against current pole and press the head cooperation to produce the negative pressure and played the effect of extracting cosmetic liquid from the cosmetics container, simultaneously, the effect that holds the chamber and can also supply cosmetic liquid to keep in and circulate that the elastomer formed. The utility model discloses the structure of pump subassembly has been simplified, and because the utility model discloses a pump head structure all adopts the PP material, has reduced the pump structure and has used the back that finishes, at the work load of retrieving the link, can use widely on a large scale.

Description

Pump head structure for cosmetic container

Technical Field

The utility model relates to a cosmetics container field especially relates to a cosmetics container is with pump head structure and working method thereof.

Background

In the prior art, in order to prevent the cosmetic liquid or solution from being polluted by frequently opening a cosmetic container cover and to facilitate use, a pressing type pump head is provided in most cosmetic containers, and when the pressing type pump head is pressed, the emulsion or solution in the cosmetic container flows out from a nozzle. The existing pressing pump head on the market has the defects of complex structure, more parts and the like, for example, the prior patent with the publication number of CN110192705A discloses a cosmetic container, wherein the parts related to the pressing pump head comprise a pump body, a pressing head, a piston seat, a bottle piston, a connecting seat, an inner plug, a spring, a first sealing ring, a first sealing gasket, a second sealing gasket and the like, the assembling process is complex, and the production efficiency is low. In addition, the spring of the commonly used pressing pump head in the market is mostly metal material, and the structure is single thin usually, because the spring is used for supporting according to the head and resets, has the problem that the hysteresis of resetting easily after the spring that the structure is single thin is used for a long time, and it is not steady enough to appear the holding power easily, influences the stability that presses the head and remove. Meanwhile, when the metal spring is used and recycled, the metal spring and other plastic parts need to be detached and sorted, and the complexity of recycling work is increased. Therefore, simplifying the structure of the pump head and using plastic elastomer instead of metal spring are the technical problems to be solved in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be: how to simplify the pump head structure and replace the use of metal springs.

For solving foretell technical problem, the utility model discloses technical scheme provides a pump head structure for cosmetic container, include according to head, pump assembly and bottle lid, its characterized in that, the pump assembly includes the elastomer, prevents adverse current pole and pump housing, the elastomer forms to both ends open-ended holds the chamber, prevent adverse current pole axial run through set up in hold the inside in chamber and with hold the both ends opening part sealing connection in chamber, the one end of elastomer with according to the headtotail, the other end embedding of elastomer the inside of pump housing.

Preferably, the pressing head is formed with a pressing head connecting portion, a nozzle, and a first flow passage communicating the nozzle with the accommodating chamber, the elastic body is provided with a first connecting part connected with the press head connecting part, a liquid outlet hole communicated with the first flow channel and the accommodating cavity, and a second connecting part embedded in the pump shell, the anti-reflux rod comprises a top rod part positioned in the first flow channel, a sealing part used for sealing the liquid outlet hole, a rod body positioned in the accommodating cavity and a tailstock part hermetically connected with the second connecting part, the pump housing comprises a first cavity used for containing the elastic body and the tail seat part, a second cavity used for containing cosmetic liquid flowing from the liquid inlet hole, a liquid inlet hole formed in the bottom of the second cavity, and a second flow channel communicated with the second cavity through the liquid inlet hole.

Preferably, the first connection portion of the elastic body is formed in a groove shape having an inner side wall with an internal thread, the button head connection portion is formed with an external thread matching the internal thread of the first connection portion, and the first connection portion and the button head connection portion are fastened and connected with the external thread through the internal thread.

Preferably, the joint of the ejector rod part and the sealing part is formed in a step state that the cross-sectional diameter of the ejector rod part is larger than that of the sealing part, and the cross-sectional diameter of the rod body is smaller than that of the sealing part.

Preferably, a piston is formed at the end of the rod body, a piston hole axially penetrating through the tail seat part is formed at the central position of the tail seat part, a support axially penetrating through the piston hole is formed on the hole wall of the piston hole, and the piston is tightly attached to the top surface of the support and axially moves along the piston hole.

Preferably, a backflow prevention pad is installed on the bottom surface of the second cavity of the pump housing, and the backflow prevention pad is a one-way flow valve.

Preferably, the inner side wall of the first cavity is provided with an anti-slip indent along the circumferential direction, the outer side wall of the second connecting portion is provided with an anti-slip protrusion at a position corresponding to the anti-slip indent, and the anti-slip protrusion of the second connecting portion embedded into the first cavity is located in the anti-slip indent.

Preferably, the pressing head is positioned in the first flow passage and protrudes outwards to form a top projection at a position corresponding to the top surface of the ejector rod part, and the distance between the surface of the top projection and the top surface of the ejector rod part is greater than the height of the sealing part.

Preferably, the top of the bottle cap is concave to form a movable groove for the press head to freely move up and down, the bottom surface of the movable groove forms a mounting hole for mounting the pump assembly, and the bottle cap is positioned below the mounting hole and forms a mounting interface for mounting the bottle cap on a cosmetic container.

The utility model discloses technical scheme's beneficial effect is:

the utility model discloses a simplify the pump package spare into the elastomer, prevent against current pole and the three essential element of pump shell, the elastomer has played the effect of spring promptly, can also with prevent against current pole and press the head cooperation to produce the negative pressure and played the effect of extracting cosmetic liquid from the cosmetics container, simultaneously, the effect that holds the chamber and can also supply cosmetic liquid to keep in and circulate that the elastomer formed. The utility model discloses to a great extent has simplified the structure of pump subassembly, and because the utility model discloses a pump head structure all adopts the PP material, has also reduced the pump structure and has used the back that finishes, at the work load of retrieving the link, can use widely on a large scale.

Drawings

Fig. 1 is a schematic structural diagram of a pump head structure in an embodiment of the present invention;

FIG. 2 is a schematic structural view of a button according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an elastic body according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of an anti-reflux rod according to an embodiment of the present invention;

fig. 5 is a bottom view of the backflow prevention rod according to the embodiment of the present invention;

fig. 6 is a schematic structural diagram of a pump housing according to an embodiment of the present invention.

Wherein, 1-press head; 2-a pump assembly; 3-bottle cap; 4-anti-reflux pad; 11-a press head connection; 12-a nozzle; 13-a first flow channel; 14-top convex; 15-a stabilizer; 21-an elastomer; 22-anti-reflux rod; 23-a pump housing; 31-a movable slot; 32-an installation interface; 151-a stopper; 152-bending part; 211-a containment chamber; 212-a first connection; 213-liquid outlet hole; 214-a second connection; 221-a stem portion; 222-a seal; 223-a rod body; 224-a tail seat portion; 231-a first cavity; 232-a second cavity; 233-liquid inlet hole; 234 — a second flow channel; 235-a flange; 2141-anti-slip protrusions; 2231-a piston; 2241-a piston bore; 2242-a support; 2311-antiskid and concave;

the specific implementation mode is as follows:

the present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

Referring to fig. 1, 2, 3, 4 and 6, a pump head structure for a cosmetic container according to the present invention is shown, which includes a button 1, a pump assembly 2 and a bottle cap 3. The pump assembly 2 comprises an elastic body 21, a backflow prevention rod 22 and a pump shell 23, wherein the elastic body 21 comprises a first connecting part 212, a liquid outlet hole 213, a containing cavity 211 and a second connecting part 214 which are formed from top to bottom, the backflow prevention rod 22 comprises a top rod part 221, a sealing part 222, a rod body 223 and a tail seat part 224 which are formed from top to bottom, and the pump shell 23 is provided with a first cavity 231, a second cavity 232, a liquid inlet hole 233, a second flow channel 234 and a flange 235; the press head 1 includes a nozzle 12, a first flow path 13, a press head connecting portion 11, a top projection 14, and a stabilizing portion 15; the bottle cap 3 includes a movable groove 31, a mounting hole (not shown), a mounting interface 32, and a catching groove (not shown). In the embodiment of the utility model provides an in, press head 1, bottle lid 3, prevent that adverse current pole 22 and pump case 23 adopt stereoplasm PP material, elastomer 21 adopts the soft PP material that has the resilience.

The utility model discloses pump head structure's equipment step is as follows:

the pump housing 23 is first snapped into the mounting hole (not shown) of the closure 3: the top edge of the pump housing 23 is provided with a flange 235, a clamping groove (not shown) is arranged at the position where the bottle cap 3 is clamped with the pump housing 23, the flange 235 of the pump housing 23 after installation is clamped into the clamping groove of the bottle cap 3, and the pump housing 23 is integrally positioned in a cavity formed by the installation interface 32 of the bottle cap 3. In the embodiment of the present invention, the mounting interface 32 of the bottle cap 3 is used for fastening the bottle cap 3 to the cosmetic container, and after the bottle cap 3 is fastened and connected to the cosmetic container, the pump housing 23 is disposed at the bottleneck of the cosmetic container;

the second connecting portion 214 of the elastic body 21 is then snapped into the first cavity 231 of the pump housing 23: the outer diameter of the second connecting portion 214 of the elastic body 21 is slightly larger than the inner diameter of the first cavity 231 of the pump housing 23, and the elastic body 21 made of soft PP material has certain ductility and elasticity, so the second connecting portion 214 of the elastic body 21 can be fastened in the first cavity 231 of the pump housing 23 by the elastic tension of the second connecting portion 214. The accommodating cavity 211 of the elastomer 21 after connection is positioned in the movable groove 31 of the bottle cap 3, and a space for the free up and down movement of the press head 1 is left between the outer wall of the accommodating cavity 211 of the elastomer 21 and the inner wall of the movable groove 31 of the bottle cap 3.

The backflow prevention rod 22 is then installed in the receiving cavity 211 of the elastic body 21: the sealing portion 222 of the installed backflow-preventing rod 22 is hermetically connected with the liquid outlet hole 213 of the elastic body 21, the tailstock portion 224 of the backflow-preventing rod 22 is hermetically connected with the second connecting portion 214 of the elastic body 21, the top rod portion 221 of the backflow-preventing rod 22 is located in the cavity formed by the first connecting portion 212 of the elastic body 21, and the rod body 223 of the backflow-preventing rod 22 is located in the accommodating cavity 211 of the elastic body 21. The embodiment of the utility model provides an in, the diameter that sets up out liquid hole 213 is less than the cross-sectional diameter of the cross section of sealing portion 222, and the diameter that sets up the second connecting portion 214 inner chamber of elastomer 21 simultaneously is less than the external diameter of tailstock portion 224, through above-mentioned setting, because the elasticity ductility of elastomer 21 self for the liquid hole 213 of elastomer 21 tightly overlaps in the sealing portion 222 of preventing backflow rod 22, and the second connecting portion 214 of elastomer 21 tightly overlaps in the tailstock portion 224 of preventing backflow rod 22. The stem part 221 and the sealing part 222 of the backflow prevention rod 22 are formed in a step shape in which the cross-sectional diameter of the stem part 221 is larger than that of the sealing part 222, so as to prevent the liquid outlet hole 213 of the elastic body 21 from moving from the sealing part 222 to the stem part 221, and as shown in fig. 1, the liquid outlet hole 213 is prevented from moving from the sealing part 222 to the stem part 221 at the step surface where the stem part 221 and the sealing part 222 are connected. Through the above arrangement, when the liquid outlet hole 213 of the elastic body 21 moves from the sealing portion 222 of the backflow prevention rod 22 to the rod body 223, a gap is formed between the edge of the liquid outlet hole 213 and the rod body 223, and the cosmetic liquid in the accommodating cavity 211 flows out of the liquid outlet hole 213 from the gap.

Finally, the button 1 is connected to the elastic body 21: the head connecting portion 11 of the head 1 is fastened to the first connecting portion 212 of the elastic body 21. The embodiment of the present invention provides a button connecting portion 11 is formed with external screw thread (not shown), first connecting portion 212 of elastomer 21 is formed with external screw thread assorted internal thread (not shown), button 1 and elastomer 21 realize fastening connection through external screw thread and internal screw thread be connected. The first flow channel 13 of the connected press head 1 is communicated with the accommodating cavity 211 through the liquid outlet hole 213 of the elastic body 21, the stabilizing part 15 of the press head 1 is positioned in the space between the outer wall of the accommodating cavity 211 and the inner wall of the movable groove 31, and the top protrusion 14 of the press head 1 is positioned at the position opposite to the top surface of the top rod part 221 of the backflow preventing rod 22.

It should be noted that the above assembling step is one of the assembling methods of the present invention, and the assembling step may be disturbed, so that the pump head structure can be assembled into a finished product state.

The embodiment of the utility model provides an in, the terminal of the stable portion 15 of press head 1 is formed with spacing portion 151 towards bottle lid 3 one side evagination, form bending 152 towards elastomer 21 one side, press head 1 and reciprocate the in-process in the activity groove 31 of bottle lid 3, spacing portion 151 hugs closely the inside wall of the activity groove 31 of bottle lid 3, the lateral wall that holds the chamber 211 of elastomer 21 is hugged closely to the terminal of bending 152, spacing portion 151 has ensured the stability when reciprocating in activity groove 31 according to head 1 with the setting of bending portion 152, it is vertical activity when guaranteeing to move about according to head 1, and not the slant activity, can effectively prevent to press the wearing and tearing of head 1 with bottle lid 3 and to damage because of the atress inequality according to head 1 and elastomer 21 junction, thereby guarantee life.

In the embodiment of the present invention, a top protrusion 14 is formed at the inner side of the top of the press head 1 protruding toward the second flow channel 234, the top protrusion 14 is disposed opposite to the top surface of the top rod part 221 of the backflow preventing rod 22, the distance between the top protrusion 14 and the top surface of the top rod part 221 is greater than the height of the sealing part 222 of the backflow preventing rod 22, the purpose of the above arrangement is that when the press head 1 is pressed, the press head connecting part 11 pushes the liquid outlet hole 213 of the elastic body 21 from the sealing part 222 of the backflow preventing rod 22 to the rod body 223, the backflow preventing rod 22 is pressed by the top protrusion 14 of the button 1 and moves downward together with the button 1, if the distance between the boss 14 and the top surface of the top bar portion 221 is not set to be greater than the height of the sealing portion 222 of the backflow preventing rod 22, that is, when the liquid outlet hole 213 is not completely separated from the sealing portion 222, the backflow prevention rod 22 and the elastic body 21 move downward together with the press head 1, and the cosmetic liquid in the housing cavity 211 of the elastic body 21 cannot flow out from the liquid outlet hole 213.

In the embodiment of the present invention, the rod body 223 of the backflow prevention rod 22 is connected to the piston 2231 with the tailstock portion 224, the tail of the rod body 223 is formed with the piston 2231, the tailstock portion 224 is formed with the piston hole 2241 that has a perfect understanding along the tailstock portion 224 axial, the axial protrusion that is formed with support 2242 along the piston hole 2241 at the downthehole side wall of piston hole 2241, as shown in fig. 5, the piston 2231 is closely attached with the top surface of the convex support 2242 and along the top surface activity of support 2242, a passage for cosmetic liquid to flow is formed between the inside walls of the piston 2231, the support 2242 and the piston hole 2241, this passage communicates with the second cavity 232 of holding chamber 211 and pump housing 23 of elastomer 21.

The embodiment of the utility model provides an in, set up anti-skidding indent 2311 at the inside wall of first cavity 231, set up anti-skidding protrusion 2141 at the lateral wall of second connecting portion 214, when going into the first cavity 231 of pump shell 23 with the second connecting portion 214 card of elastomer 21, anti-skidding protrusion 2141 is located anti-skidding indent 2311, anti-skidding protrusion 2141 has increased the frictional force between the second connecting portion 214 of elastomer 21 and the inside wall of the first cavity 231 of pump shell 23 with anti-skidding indent 2311's compound mode, thereby further increase the fastening stability of elastomer 21 and pump shell 23.

The embodiment of the utility model provides an in, be provided with between second cavity 232 of pump housing 23 and the second runner 234 and supply cosmetic liquid to flow to second cavity 232's feed liquor hole 233 from second runner 234, for control cosmetic liquid uniflow, can only flow to second cavity 232 in from second runner 234 promptly, the installation prevents to flow against the current pad 4 between second cavity 232's bottom and feed liquor hole 233, the utility model discloses the conventional check valve structure in the current design is filled up 4 against the current of preventing for use, and this department is no longer repeated.

The utility model discloses in, the whole flow direction of cosmetics liquid does: cosmetic liquid enters the second flow passage 234 from the cosmetic container, enters the second chamber 232 through the backflow prevention pad 4 of the liquid inlet hole 233, enters the accommodating chamber 211 from the second chamber 232 through the piston hole 2241 of the tail seat portion 224, then enters the first flow passage 13 from the accommodating chamber 211 through the liquid outlet hole 213, and finally flows out of the pump head from the second flow passage 234 through the nozzle 12.

The utility model discloses realize the mobile method of above-mentioned cosmetic liquid as follows:

pressing the press head 1, compressing the elastic body 21 downwards by the press head 1 through the press head connecting part 11, sliding the liquid outlet hole 213 of the elastic body 21 from the sealing part 222 of the backflow prevention rod 22 to the rod body 223 in the compression process, generating a gap between the liquid outlet hole 213 and the rod body 223 when the liquid outlet hole 213 slides to the position of the rod body 223 because the cross-sectional diameter of the rod body 223 is smaller than that of the sealing part 222, and flowing the cosmetic liquid stored in the accommodating cavity 211 to the first flow channel 13 from the gap;

continuously pressing the press head 1, enabling the top protrusion 14 of the press head 1 to be in contact with the top rod part 221 of the backflow prevention rod 22 and enabling the backflow prevention rod 22 to move downwards along with the press head 1, further compressing the accommodating cavity 211, enabling the cosmetic liquid in the accommodating cavity 211 to continuously flow to the first flow channel 13 from the gap, and enabling the cosmetic liquid to flow to the nozzle 12 from the first flow channel 13 and flow out from the nozzle 12 after the first flow channel 13 is filled;

when the press head 1 is released, the elastic body 21 rebounds, the liquid outlet hole 213 of the elastic body 21 rebounds from the rod body 223 of the backflow prevention rod 22 to the sealing part 222 and forms a sealing connection with the sealing part 222, rebounds continuously, and the liquid outlet hole 213 rebounds to a step formed between the sealing part 222 and the top rod part 221 and drives the backflow prevention rod 22 to rebound towards the press head 1.

In the rebounding process, the volume of the accommodating cavity 211 is expanded to enable the pressure generated in the accommodating cavity 211 to be lower than the pressure inside the cosmetic container, namely, negative pressure is formed in the accommodating cavity 211 relative to the cosmetic container, the cosmetic liquid in the cosmetic container enters the second cavity 232 in the pump housing 23 through the backflow preventing pad 4 at the liquid inlet hole 233 to continue rebounding, and the cosmetic liquid in the second cavity 232 enters the accommodating cavity 211 through the piston hole 2241 of the tail seat part 224 to supplement the cosmetic liquid flowing out of the accommodating cavity 211.

To sum up, the utility model discloses a simplify the pump package spare into the elastomer, prevent against the current pole and the three essential element of pump shell, the elastomer has played the effect of spring promptly, can also with prevent against the current pole and press the head cooperation to produce the negative pressure and played the effect of extracting cosmetic liquid from the cosmetics container, simultaneously, the chamber that holds that the elastomer formed can also supply cosmetic liquid to keep in and circulate the effect. The utility model discloses to a great extent has simplified the structure of pump subassembly, and because the utility model discloses a pump head structure all adopts the PP material, has also reduced the pump structure and has used the back that finishes, at the work load of retrieving the link, can use widely on a large scale.

The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.

Claims

1. The utility model provides a pump head structure for cosmetic container, includes press head, pump assembly and bottle lid, its characterized in that, the pump assembly includes the elastomer, prevents against current pole and pump shell, the elastomer forms both ends open-ended and holds the chamber, prevent against current pole axial run through set up in hold the inside of chamber and with hold the both ends opening part sealing connection in chamber, the one end of elastomer with press the head to be connected, the other end embedding of elastomer the inside of pump shell.

2. A pump head structure for a cosmetic container as set forth in claim 1, wherein the push head is formed with a push head connecting portion, a nozzle, and a first flow path communicating the nozzle with the accommodating chamber, the elastic body is provided with a first connecting part connected with the press head connecting part, a liquid outlet hole communicated with the first flow channel and the accommodating cavity, and a second connecting part embedded in the pump shell, the anti-reflux rod comprises a top rod part positioned in the first flow channel, a sealing part used for sealing the liquid outlet hole, a rod body positioned in the accommodating cavity and a tailstock part hermetically connected with the second connecting part, the pump housing comprises a first cavity used for containing the elastic body and the tail seat part, a second cavity used for containing cosmetic liquid, a liquid inlet hole formed in the bottom of the second cavity, and a second flow channel communicated with the second cavity through the liquid inlet hole.

3. A pump head structure for a cosmetic container according to claim 2, wherein the first connecting portion of the elastic body is formed in a groove shape having an internal thread on an inner side wall thereof, the push head connecting portion is formed with an external thread that matches the internal thread of the first connecting portion, and the first connecting portion and the push head connecting portion are fastened to the external thread through the internal thread.

4. A pump head structure for a cosmetic container as set forth in claim 2, wherein the connection of the stem portion and the seal portion is formed in a stepped state in which the cross-sectional diameter of the stem portion is larger than that of the seal portion, and the cross-sectional diameter of the stem portion is smaller than that of the seal portion.

5. A pump head structure for a cosmetic container as set forth in claim 2, wherein the rod body has a piston formed at an end thereof, the tail portion has a piston hole formed at a central position thereof and extending axially therethrough, and a support member is formed at a hole wall of the piston hole and extending axially therethrough, the piston abutting against a top surface of the support member and moving axially along the piston hole.

6. A pump head structure for a cosmetic container as set forth in claim 2, wherein a backflow prevention pad is installed at a bottom surface of the second chamber of the pump housing, the backflow prevention pad being a one-way flow valve.

7. A pump head structure for a cosmetic container according to claim 2, wherein an anti-slip recess is provided in an inner side wall of the first chamber in a circumferential direction, an anti-slip protrusion is provided at a position corresponding to the anti-slip recess on an outer side wall of the second connecting portion, and the anti-slip protrusion of the second connecting portion fitted into the first chamber is located in the anti-slip recess.

8. A pumphead structure for a cosmetic container as set forth in claim 2, wherein the pressing head is formed to protrude outward in the first flow path at a position corresponding to the top surface of the plunger portion, and a surface of the protruding portion is spaced apart from the top surface of the plunger portion by a distance greater than a height of the seal portion.

9. A pump head structure for a cosmetic container as set forth in claim 1, wherein the top of the cap is recessed to form a movable groove for the pressing head to move freely up and down, a bottom surface of the movable groove forms a mounting hole for mounting the pump unit, and the cap is formed with a mounting port for mounting to a cosmetic container below the mounting hole.