A fully plastic lotion pump

Abstract

The invention discloses an all-plastic lotion pump, comprising a body, a screw thread, a push head, a main column, a straw, a plastic spring, a pull rod, a plug, a lock cover, a first one-way valve device and a second one-way valve device, which are made of plastic material. The main column is connected to the push head, the plastic spring is located in the body and is used to push the main column upward, and the plastic spring is connected to the main column and the inlet of the body to form a channel for liquid flow. A connecting port is provided between the plastic spring and the main column, the pull rod is located in the plastic spring and passes through the connecting port, the plug is connected to the upper end of the pull rod, when the plastic spring is pressed down, there is a gap between the pull rod and the side wall of the connecting port, when the plastic spring bounces up, the plug blocks and seals the connecting port, the first one-way valve device is arranged between the push head and the main column to allow the lotion in the main column to flow to the push head, and the second one-way valve device is arranged between the plastic spring and the inlet of the body to allow the lotion to flow from the inlet of the body into the plastic spring. The pump is environmentally friendly and safe, and is easy to recycle.

Description

[Technical field]

[0001] The invention relates to an all-plastic lotion pump. [Background technology]

[0002] At present, lotion pumps on the market are mainly composed of a push head (or elbow), a locking cover, a metal spring, a screw cover, a body, a main column, a piston, a secondary column and a glass ball. For example, a lotion pump described in Patent No. 201020679937.3 published in Chinese patent literature includes a push head, a locking cover, a gasket, a spring, a screw cover, a body, a main column, a piston, a secondary column, a glass ball and a straw. The inner cylinder in the middle of the push head is connected to the upper part of the main column, the outer cylinder in the middle of the push head is sleeved on the cylinder on the upper part of the screw cover, the screw cover is connected to the locking cover, and the inner wall of the screw cover is provided with a thread matching the bottle mouth, the two ends of the spring are pressed on the main column and the locking cover respectively, and the spring is located in the annular cylindrical cavity outside the wall of the main column. This type of lotion pump structure contains a metal spring, so it is difficult for it to meet the environmental protection control standards of foreign countries, especially the European and American markets. A lotion pump contains plastic, metal and glass parts at the same time, which need to be disassembled and recycled, which is not conducive to product recycling. In addition, a piston is used, and the inner cavity of the body is used as a pump cavity for the piston to move up and down. The lotion enters the inner cavity of the body from the straw through the glass ball, and enters the main column through the piston and the auxiliary column and flows out from the head. In the initial state, a small amount of lubricant that does not conflict with the performance of the lotion needs to be injected to lubricate the piston so that the piston can move smoothly in the inner cavity of the body when it is used.

[0003] The present invention is made based on this situation. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is to provide a fully plastic lotion pump, all parts of which are made of plastic materials, which can easily meet high standards of environmental protection requirements, is easy to recycle, and does not require the use of lubricating fluid.

[0005] To solve the above technical problems, the present invention provides an all-plastic lotion pump, characterized in that it includes a body and a push head, the upper end of the body is provided with a screw thread, the lower end of the body is provided with a straw connected to the inlet of the lower end, the push head is connected to a main column inserted into the body, the inner cavity of the body is provided with a plastic spring that can push the push head and the main column upward, the plastic spring is located below the main column, and the plastic spring and the main column are sealed and connected, the plastic spring is a plastic spring tube with upper and lower ends opened and side sealed, the upper end of the plastic spring is connected to the main column, and the lower end is connected to the inlet of the body so that the plastic spring forms a channel connecting the main column and the inlet of the body and for liquid flow, a connecting port is provided between the plastic spring and the main column to connect the two up and down, a pull rod is provided on the inner side of the plastic spring in the body, the pull rod corresponds to the connecting port up and down, and is in the plastic spring When the spring is pressed down, it can pass through the connecting port and there is a gap between the spring and the side wall of the connecting port. The upper end of the pull rod is provided with a plug located above the connecting port. When the plastic spring bounces up, the plug can press on the connecting port from above to pull the plastic spring and the main column downward and block the connecting port and seal it. The upper end of the body is provided with a locking cover that can limit the plastic spring in the body. A first one-way valve device is provided between the push head and the main column, which can allow the emulsion in the main column to flow to the push head while preventing the emulsion in the push head from flowing to the main column. A second one-way valve device is provided between the plastic spring and the inlet of the body, which can allow the emulsion to flow from the inlet of the body into the plastic spring while preventing the emulsion in the plastic spring from flowing out of the inlet of the body. The body, screw thread, push head, main column, straw, plastic spring, pull rod, plug, locking cover, first one-way valve device and second one-way valve device are respectively made of plastic materials.

[0006] The all-plastic lotion pump as described above is characterized in that the locking cover is sleeved on the outside of the main column, and a waterproof cover is provided between the locking cover and the main column to block the gap between the upper end of the locking cover and the main column.

[0007] The all-plastic lotion pump as described above is characterized in that the plastic spring and the main column are buckled and connected to prevent the two from being separated up and down.

[0008] The all-plastic lotion pump as described above is characterized in that: an annular buckling portion is provided on the upper end of the plastic spring and is inserted into the main column from the lower end of the main column, the outer side surface of the buckling portion is sealed and connected with the inner side surface of the main column, the connecting port is provided on the plastic spring and is located on the inner side of the buckling portion, a second buckling ring protrudes from the outer side of the buckling portion, and a second buckling groove which is concave and buckled with the second buckling ring is provided on the inner wall of the main column.

[0009] The all-plastic lotion pump as described above is characterized in that: the upper end of the plastic spring is located on the outer side of the buckle portion and is provided with an annular end surface that can be sealed and fitted with the lower end surface of the main column. When the main column is pressed downward, the lower end surface of the main column is pressed on the annular end surface and a seal is formed between the two end surfaces.

[0010] The all-plastic lotion pump as described above is characterized in that: the inner holes of the lower ends of the buckling portion and the main column are circular, the second buckling ring and the second buckling groove are correspondingly circular, and enable the main column to rotate relative to the plastic spring under the action of external force, and a guide structure for guiding the main column to move up and down is provided between the locking cover and the main column, and the guide structure is dislocated and prevents the main column from moving up and down when the main column rotates relative to the locking cover.

[0011] The all-plastic lotion pump as described above is characterized in that: the guide structure includes a guide groove arranged on the lock cover, the main column is provided with a guide column that cooperates with the guide groove to guide up and down, one side of the upper end of the guide groove is provided with a concave locking groove that can be inserted into the guide column after the main column is bounced up after the guide column rotates out of the guide groove, and the bottom of the locking groove is located below the guide column and limits the downward movement of the guide column.

[0012] An all-plastic lotion pump as described above is characterized in that: the first one-way valve device includes a first valve core, a main column outlet connected to the push head is provided in the main column, the first valve core includes a first outer ring fixed between the push head and the main column, a first inner core is provided on the inner side of the first outer ring, which is isolated from the first outer ring and covers the main column outlet from the push head side, the first outer ring and the first inner core are elastically connected by a first rib and enable the first inner core to float upward when the bottom is pressurized to open the main column outlet.

[0013] The all-plastic lotion pump as described above is characterized in that: a sealing seat is provided between the plastic spring and the body to seal the two, the lower end of the pull rod is fixed on the sealing seat, a bottom cavity is provided at the bottom of the sealing seat, a through hole connecting the plastic spring and the bottom cavity is provided on the sealing seat, and the bottom cavity is connected to the inlet of the body.

[0014] An all-plastic lotion pump as described above is characterized in that: the second one-way valve device includes a second valve core, the second valve core is located in the bottom cavity, the second valve core includes a second outer ring fixed between the sealing seat and the body, the second outer ring is provided with a second inner core on the inner side thereof, which is isolated from the second outer ring and covers the inlet of the body from one side of the bottom cavity, the second outer ring and the second inner core are elastically connected by a second rib and enable the second inner core to float upward when the bottom is pressurized, thereby opening the inlet of the body.

[0015] An all-plastic lotion pump as described above is characterized in that: the locking cover is located above the plastic spring, and when the plastic spring bounces up, it blocks the plastic spring from above and limits the maximum height of the plastic spring bouncing up, the plastic spring is in a compressed state when it bounces up and presses on the locking cover, the lower end of the plastic spring presses on the sealing seat and presses the sealing seat against the bottom of the inner cavity of the main body, the sealing seat is provided with a sealing groove for the lower end of the plastic spring to be inserted, the lower end surface of the plastic spring is pressed on the groove bottom of the sealing groove and is sealed with the groove bottom of the sealing groove, and under the pressure of the plastic spring, the bottom surface of the sealing seat is tightly fitted to the bottom of the inner cavity of the main body and a seal is formed between the bottom surface of the sealing seat and the bottom of the inner cavity of the main body.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The present invention is a fully plastic lotion pump, and all parts constituting the lotion pump are made of plastic materials, which can better meet high standards of environmental protection requirements and is easy to recycle. There is no need to disassemble the parts and then classify them for recycling, and there is no need to use a piston and a lubricating fluid for the piston.

[0018] 2. The present invention adopts a brand-new structure, by arranging a tubular plastic spring with side sealing under the main column, connecting the main column and the inlet of the main body through the plastic spring, forming a channel for the emulsion to flow from the inlet of the main body to the main column, and then arranging a first one-way valve device between the pressing head and the main column, and arranging a second one-way valve device between the plastic spring and the inlet of the main body, so that a storage chamber for storing the emulsion is formed between the main column, the plastic spring, the first one-way valve device and the second one-way valve device. When the pressing head is pressed under the action of external force, the plastic spring is compressed and shortened, the volume of the storage chamber becomes smaller, the internal pressure becomes larger, and a pressure difference is formed with the outside. Since the first one-way valve device and the second one-way valve device are both one-way flow structures, the emulsion flows from the storage chamber through the first one-way valve device to the pressing head and flows out from the pressing head. When the external force is released, the main column and the pressing head are pushed upward under the elastic force of the plastic spring, the plastic spring is opened and lengthened, the volume of the storage chamber increases, the internal pressure decreases, and a pressure difference is formed with the outside, and the lotion flows into the storage chamber from the entrance of the body through the second one-way valve device through the straw, thereby achieving the effect of pumping the lotion. The pull rod inside the plastic spring is provided with a plug at the upper end of the pull rod. When the plastic spring bounces up, the plug is pressed on the connecting port to pull the plastic spring and the main column downward and block the connecting port to seal. When the bottle is deformed by pressure, the lotion in the plastic spring can be prevented from entering the main column through the connecting port, thereby preventing the lotion in the main column from flowing to the pressing head and then flowing out, and the sealing performance is good. The plug is an inverted cone structure, and the middle and lower parts can be pressed into the connecting port, and the sealing performance is better. When the pressing head is pressed, the connecting port moves downward with the contraction of the main column and the plastic spring, and is separated from the plug. The lotion flows from the plastic spring into the main column through the gap between the pull rod and the side wall of the connecting port.

[0019] 3. The lock cover of the present invention is located above the plastic spring, and when the plastic spring bounces up, it blocks the plastic spring from above and limits the maximum height of the plastic spring. When the plastic spring bounces up and presses on the lock cover, it is in a compressed state. The lower end of the plastic spring presses on the sealing seat and presses the sealing seat against the bottom of the inner cavity of the body. The sealing seat is provided with a sealing groove for the lower end of the plastic spring to be inserted. The lower end surface of the plastic spring presses on the groove bottom of the sealing groove and is sealed with the groove bottom of the sealing groove. Under the pressure of the plastic spring, the bottom surface of the sealing seat is tightly fitted to the bottom of the inner cavity of the body and forms a seal between the bottom surface of the sealing seat and the bottom of the inner cavity of the body. Since the plastic spring is in a compressed state to varying degrees in the bounced state and the depressed state and in the process of bounce and depressed, the sealing seat can always be pressed against the bottom of the inner cavity of the body, the sealing seat and the body are always sealed and connected, and the lower end surface of the plastic spring is always pressed on the groove bottom of the sealing groove for sealing connection. And because the plastic spring presses between the lock cover and the sealing seat when it is in the popped-up state, the friction force that the plastic spring and the sealing seat need to overcome for rotation is large. When the button and the main column are rotated, the main column can rotate relative to the plastic spring, thereby preventing the plastic spring and the sealing seat from rotating.

[0020] 4. In the present invention, the plastic spring is in a compressed state after springing up, one of which can stabilize the position of the button head and the main column after springing up; the other is that after the plastic spring springs up, the pull rod and the plug can tightly pull the connecting port to ensure sealing; and when the bottle is deformed by pressure and the pressure in the inner cavity of the plastic spring increases, the upward pressure of the plastic spring is shared by the locking cover to avoid excessive pulling force on the pull rod and the plug at the connecting port.

Brief Description of the Drawings

[0021] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0022] Figure 1 It is a cross-sectional view of a fully plastic lotion pump of the present invention in a state where the head is pushed and popped up;

[0023] Figure 2 It is a cross-sectional view of a full-plastic lotion pump of the present invention when the button is pressed;

[0024] Figure 3 It is a schematic diagram of the structure of a plastic spring;

[0025] Figure 4 It is a structural schematic diagram of the sealing seat;

[0026] Figure 5 is a schematic diagram of the structure of the first valve core and the second valve core;

[0027] Figure 6 It is a schematic diagram of the structure of the head;

[0028] Figure 7 It is a structural diagram of the main column;

[0029] Figure 8 It is a structural diagram of the lock cover. [Specific implementation method]

[0030] The present invention will be further described below in conjunction with the accompanying drawings:

[0031] like Figures 1 to 8 The full-plastic lotion pump shown in the figure comprises a body 1 and a push head 2, wherein the upper end of the body 1 is provided with a screw thread 3 for connecting with a bottle, the lower end of the body 1 is provided with a straw 4 connected with an inlet 11 at the lower end thereof, the push head 2 is connected with a main column 5 inserted into the body 1, a plastic spring 6 capable of pushing the push head 2 and the main column 5 upward is provided in the inner cavity of the body 1, the plastic spring 6 is located below the main column 5, and the plastic spring 6 and the main column 5 are sealed and connected, the plastic spring 6 is a plastic spring tube with upper and lower ends opened and side sealed, the upper end of the plastic spring 6 is connected with the main column 5, and the lower end is connected with the inlet 11 of the body so that the plastic spring 6 forms a channel connecting the main column 5 and the inlet 11 of the body and for liquid flow, a connecting port 61 is provided between the plastic spring 6 and the main column 5 for connecting the two up and down, a pull rod 7 is provided inside the body 1 and is located inside the plastic spring 6, the pull rod 7 corresponds to the connecting port 61 up and down, and can be pulled from the connecting port 61 when the plastic spring 6 is pressed down The connecting hole 61 passes through the connecting hole 61 and there is a gap between the connecting hole 61 and the side wall of the connecting hole 61. The upper end of the pull rod 7 is provided with a plug 71 located above the connecting hole 61. When the plastic spring 6 bounces up, the plug 71 can press on the connecting hole 61 from above to pull the plastic spring 6 and the main column 5 downward and block the connecting hole 61. The upper end of the body 1 is provided with a locking cover 8 that can limit the plastic spring 6 in the body 1. A locking cover 8 is provided between the pressing head 2 and the main column 5 to allow the emulsion in the main column 5 to flow to the pressing head 2 and prevent the pressing The emulsion in the head 2 flows to the first one-way valve device of the main column 5, and a second one-way valve device is provided between the plastic spring 6 and the inlet 11 of the body, which can allow the emulsion to flow into the plastic spring 6 from the inlet 11 of the body and prevent the emulsion in the plastic spring 6 from flowing out of the inlet 11 of the body. The body 1, screw thread 3, head 2, main column 5, straw 4, plastic spring 6, pull rod 7, plug 71, lock cover 8, first one-way valve device and second one-way valve device are respectively made of plastic materials.

[0032] The all-plastic lotion pump adopts a brand-new structure. A tubular plastic spring 6 with a side seal is arranged below the main column 5. The main column 5 and the inlet 11 of the main body are connected through the plastic spring 6 to form a channel for the lotion to flow from the inlet 11 of the main body to the main column 5. A first one-way valve device is arranged between the pressing head 2 and the main column 5, and a second one-way valve device is arranged between the plastic spring 6 and the inlet 11 of the main body, so that a storage chamber for storing the lotion is formed between the main column 5, the plastic spring 6, the first one-way valve device and the second one-way valve device. When the pressing head 2 is pressed under the action of an external force, the plastic spring 6 is compressed and shortened, the volume of the storage chamber becomes smaller, the internal pressure becomes larger, and a pressure difference is formed with the outside. Since the first one-way valve device and the second one-way valve device are both one-way flow structures, the lotion flows from the storage chamber through the first one-way valve device to the pressing head 2 and flows out of the pressing head 2. When the external force is released, the main column 5 and the push head 2 are pushed upward under the elastic force of the plastic spring 6, the plastic spring 6 opens and lengthens, the volume of the storage chamber increases, the internal pressure decreases, and a pressure difference is formed with the outside. The lotion flows into the storage chamber through the suction tube 4 from the inlet 11 of the main body through the second one-way valve device, thereby achieving the effect of pumping the lotion.

[0033] The pull rod 7 on the inner side of the plastic spring 6 is provided with a plug 71 at the upper end of the pull rod 7. When the plastic spring 6 bounces up, the plug 71 is pressed on the connecting port 61 to pull the plastic spring 6 and the main column 5 downward and seal the connecting port 61. When the bottle is deformed under pressure, the lotion in the plastic spring 6 can be prevented from entering the main column 5 through the connecting port 61, thereby preventing the lotion in the main column 5 from flowing to the pressing head 2 and then flowing out, and the sealing performance is good. The plug 71 is an inverted cone structure, and the middle and lower parts can be pressed into the connecting port 61, and the sealing stability is better. When the pressing head 2 is pressed, the connecting port 61 moves downward with the contraction of the main column 5 and the plastic spring 6, and is separated from the plug 71. The lotion flows from the plastic spring 6 into the main column 5 through the gap between the pull rod 7 and the side wall of the connecting port 61.

[0034] With the above structure, all parts constituting the lotion pump can be made of plastic materials to better meet high standards of environmental protection requirements, and are easy to recycle without disassembling the parts and then classifying them for recycling, and without using pistons and lubricants for the pistons.

[0035] The locking cover 8 is sleeved on the outside of the main column 5, and a waterproof sleeve 9 is provided between the locking cover 8 and the main column 5 to block the gap between the upper end of the locking cover 8 and the main column 5. The waterproof sleeve 9 is made of plastic material. Since the locking cover 8 is fixed on the main body, the main column 5 moves up and down relative to the locking cover 8. By providing the waterproof sleeve 9, it is possible to prevent external liquid and debris from entering the main body 1 through the gap between the locking cover 8 and the main column 5, thereby preventing the inside of the lotion pump from being contaminated.

[0036] The plastic spring 6 and the main column 5 are buckled and connected to each other and can prevent the two from being separated up and down, so that the plastic spring 6 and the main column 5 are easy to assemble and disassemble.

[0037] The upper end of the plastic spring 6 is provided with an annular buckling portion 62 which is inserted into the main column 5 from the lower end thereof. The outer side surface of the buckling portion 62 is sealedly connected with the inner side surface of the main column 5. The connecting port 61 is provided on the plastic spring 6 and is located on the inner side of the buckling portion 62. A second buckling ring 63 protrudes from the outer side of the buckling portion 62. The inner wall of the main column 5 is provided with a concave second buckling groove 51 which is buckled with the second buckling ring 63. During assembly, the buckling portion 62 and the main column 5 are plugged together until the second buckling ring 63 is buckled with the second buckling groove 51.

[0038] The upper end of the plastic spring 6 is located on the outside of the buckle 62 and is provided with an annular end face 64 that can seal with the lower end face of the main column 5. When the main column 5 is pressed down, the lower end face of the main column 5 is pressed on the annular end face 64 and a seal is formed between the two end faces. When the pressing head 2 is pressed down, the internal pressure of the main column 5 increases, and during the pressing process, the lower end face of the main column 5 is pressed on the annular end face 64 and a seal is formed between the two end faces, so that the main column 5 and the plastic spring 6 have better sealing. When the main column 5 is stationary and in the process of bouncing, since the internal pressure of the main column 5 is small, the outer side surface of the buckle 62 is sealed and connected with the inner side surface of the main column 5 to prevent the liquid in the main column 5 from flowing out from the connection between the main column 5 and the plastic spring 6.

[0039] The inner holes of the lower ends of the buckling portion 62 and the main column 5 are circular, and the second buckling ring 63 and the second buckling groove 51 are correspondingly circular, so that the main column 5 can rotate relative to the plastic spring 6 under the action of external force. A guide structure for guiding the main column 5 to move up and down is provided between the lock cover 8 and the main column 5. When the main column 5 rotates relative to the lock cover 8, the guide structure is dislocated and prevents the main column 5 from moving up and down.

[0040] The guide structure includes a guide groove 81 arranged on the lock cover 8, and a guide column 53 is provided on the main column 5 for upward and downward guidance in cooperation with the guide groove 81. One side of the upper end of the guide groove 81 is provided with a concave locking groove 82 for the guide column 53 to be rotated out of the guide groove 81 and then locked into after the main column 5 pops up. The bottom of the locking groove 82 is located below the guide column 53 and limits the downward movement of the guide column 53.

[0041] When the plastic spring 6 is in the pop-up state, the button 2 and the main column 5 are rotated to make the main column 5 rotate relative to the locking cover 8, and the guide column 53 rotates out of the guide groove 81 and is locked in the locking groove 82, so that the main column 5 cannot move downward. In the pop-up state, the plastic spring 6 is restricted by the locking cover 8, and the pull rod 7 and the plug 71 pull the plastic spring 6 and the main column 5 downward, thereby restricting the main column 5 from moving upward, thereby locking the lotion pump. Of course, since the plastic spring 6 and the main column 5 are buckled, the main column 5 can be forcibly pulled off the plastic spring 6 when the external force is large enough.

[0042] The first one-way valve device includes a first valve core 10, and a main column outlet 52 connected to the push head 2 is provided in the main column 5. The first valve core 10 includes a first outer ring 101 fixed between the push head 2 and the main column 5. The inner side of the first outer ring 101 is provided with a first inner core 102 which is isolated from the first outer ring 101 and covers the main column outlet 52 from the push head 2 side. The first outer ring 101 and the first inner core 102 are elastically connected by a first rib 103 so that the first inner core 102 can float upward when the bottom is pressurized to open the main column outlet 52. The structure is simple.

[0043] The lower end of the push head 2 is provided with a first positioning groove 21 which is concave and for the first outer ring 101 to be inserted and positioned. The main column 5 is provided with an annular boss 54 which protrudes toward the push head 2 and presses the first inner core 102 toward the push head 2 on the outer side of the main column outlet 52. The annular boss 54 is located on the lower inner side of the first inner core 102, and the main column outlet 52 is sealed by the first inner core 102 pressing on the annular boss 54. The annular boss 54 protrudes upward and presses the first inner core 102 toward the push head 2, so that the first inner core 102 and the annular boss 54 have an initial pre-pressure, so that the main column 5 has better sealing performance when it is in a static state and during the pop-up process.

[0044] The first outer ring 101 , the first inner core 102 and the first rib 103 are integrally formed of an elastic plastic material, preferably a rubber material, and have a simple structure.

[0045] The inner wall of the main column 5 is provided with an inwardly concave first buckling groove 55, the push head 2 is provided with a first buckling ring 22 which is inserted into the first buckling groove 55 and limits the push head 2 up and down, an anti-rotation groove 56 is provided along the circumferential direction on the inner side of the main column 5, and the push head 2 is provided with an anti-rotation strip 23 which can be inserted into the anti-rotation groove 56 to prevent the push head 2 from rotating relative to the main column 5.

[0046] When the push head 2 and the main column 5 are assembled, the first valve core 10 is first placed in the first positioning groove 21 at the lower end of the push head 2, and the anti-rotation strip 23 is facing the anti-rotation groove 56, and the push head 2 is inserted into the upper end of the main column 5 until the first buckling ring 22 is buckled with the first buckling groove 55. At this time, the first outer ring 101 is pressed between the push head 2 and the main column 5, and the first inner core 102 is pressed on the annular boss 54. Figure 2 , simple structure and easy assembly.

[0047] A sealing seat 70 is provided between the plastic spring 6 and the body 1 to seal and connect the two. The sealing seat 70 is made of plastic material. The lower end of the pull rod 7 is fixed on the sealing seat 70. A bottom cavity 701 is provided at the bottom of the sealing seat 70. A through hole 702 is provided on the sealing seat 70 to connect the plastic spring 6 and the bottom cavity 701. The bottom cavity 701 is connected to the inlet 11 of the body. The lower end of the plastic spring 6 is sealed and the pull rod 7 is fixed by the sealing seat 70, and the structure is simple.

[0048] The second one-way valve device includes a second valve core 20, which is located in the bottom cavity 701. The second valve core 20 includes a second outer ring 201 fixed between the sealing seat 70 and the main body 1. The inner side of the second outer ring 201 is provided with a second inner core 202 which is isolated from the second outer ring 201 and covers the entrance 11 of the main body from the side of the bottom cavity 701. The second outer ring 201 and the second inner core 202 are elastically connected by second ribs 203, so that the second inner core 202 can float upward when the bottom is pressurized, thereby opening the entrance 11 of the main body. The structure is simple.

[0049] The second outer ring 201, the second inner core 202 and the second rib 203 are integrally formed of an elastic plastic material, preferably a rubber material, which has a simple structure and is easy to manufacture.

[0050] The lock cover 8 is located above the plastic spring 6, and when the plastic spring 6 bounces up, it blocks the plastic spring 6 from above and limits the maximum height of the plastic spring 6 when it bounces up. The plastic spring 6 is in a compressed state when it bounces up and presses on the lock cover 8. The lower end of the plastic spring 6 presses on the sealing seat 70 and presses the sealing seat 70 against the bottom of the inner cavity of the body 1. The sealing seat 70 is provided with a sealing groove 703 for the lower end of the plastic spring 6 to be inserted. The lower end surface of the plastic spring 6 is pressed on the bottom of the sealing groove 703 and is sealed with the bottom of the sealing groove 703. Under the pressure of the plastic spring 6, the bottom surface of the sealing seat 70 is tightly fitted on the bottom of the inner cavity of the body 1 and a seal is formed between the bottom surface of the sealing seat 70 and the bottom of the inner cavity of the body 1. Since the plastic spring 6 is in a compressed state to varying degrees in the bounced state and the pressed state and in the process of bounced and pressed, the sealing seat 70 can always be pressed against the bottom of the inner cavity of the main body 1, the sealing seat 70 and the main body 1 are always sealed and connected, and the lower end surface of the plastic spring 6 is always pressed against the bottom of the sealing groove 703 for sealing connection.

[0051] Since the plastic spring 6 is pressed between the lock cover 8 and the sealing seat 70 when in the pop-up state, the friction force that the plastic spring 6 and the sealing seat 70 need to overcome for rotation is large. When the button 2 and the main column 5 are rotated, the main column 5 can rotate relative to the plastic spring 6, thereby preventing the plastic spring 6 and the sealing seat 70 from rotating.

[0052] Therefore, an independent sealing seat 70 and plastic spring 6 are used. After the plastic spring 6 is inserted into the sealing groove 703 of the sealing seat 70, the pull rod 7 is inserted from the plastic spring 6, and the pull rod 7 is plugged into the sealing seat 70. The plastic spring 6 is restricted between the sealing seat 70 and the plug 71 to form a whole, which can be inserted into the main body 1. The side wall of the sealing seat 70 cooperates with the side wall of the inner cavity of the main body 1. The structure is simple and the assembly is convenient.

[0053] In addition, a second positioning groove 704 is provided at the bottom of the sealing seat 70 for the second outer ring 201 to be inserted and positioned. When the sealing seat 70 is installed into the main body 1, the second valve core 20 is placed in the second positioning groove 704, and the second valve core 20 can be fixed above the inlet 11 of the main body 1 by the elastic force of the plastic spring 6.

[0054] Moreover, the plastic spring 6 is in a compressed state after springing up, one of which can stabilize the position of the button 2 and the main column 5 after springing up; the other is that after the plastic spring 6 springs up, the pull rod 7 and the plug 71 can tightly pull the connecting port 61 to ensure sealing; and when the bottle is compressed and deformed and the pressure in the inner cavity of the plastic spring 6 increases, the upward pressure of the plastic spring 6 is shared to avoid excessive pulling force on the pull rod 7 and the plug 71 at the connecting port 61.

Claims

1. A fully plastic lotion pump, characterized in that: The invention comprises a body (1) and a pressing head (2), wherein the upper end of the body (1) is provided with a screw thread (3), the lower end of the body (1) is provided with a straw (4) connected to an inlet (11) at the lower end thereof, the pressing head (2) is connected to a main column (5) inserted into the body (1), a plastic spring (6) capable of lifting the pressing head (2) and the main column (5) upwards is provided in the inner cavity of the body (1), the plastic spring (6) is located below the main column (5), and the plastic spring (6) and the main column (5) are sealedly connected, the plastic spring (6) is a plastic spring tube with upper and lower ends opened and side sealed, the upper end of the plastic spring (6) is connected to the main column (5), and the lower end is connected to the inlet of the body The main column (5) and the main body (1) are connected to each other so that the plastic spring (6) forms a channel for connecting the main column (5) and the inlet (11) of the main body and for allowing liquid to flow. A connecting port (61) is provided between the plastic spring (6) and the main column (5) to connect the two up and down. A pull rod (7) is provided inside the main body (1) and is located on the inner side of the plastic spring (6). The pull rod (7) corresponds to the connecting port (61) up and down and can pass through the connecting port (61) when the plastic spring (6) is pressed down and there is a gap between the pull rod (7) and the side wall of the connecting port (61). The upper end of the pull rod (7) is provided with a plug (71) located above the connecting port (61). When the plastic spring (6) bounces up, the plug (71) can be inserted from above. The connecting port (61) is pressed to pull the plastic spring (6) and the main column (5) downwards and seal the connecting port (61). The upper end of the main body (1) is provided with a locking cover (8) capable of restricting the plastic spring (6) within the main body (1). The locking cover (8) is located above the plastic spring (6) and blocks the plastic spring (6) from above when the plastic spring (6) bounces up and limits the maximum height of the plastic spring (6) when it bounces up. When the plastic spring (6) bounces up and presses on the locking cover (8), it is in a compressed state. The lower end of the plastic spring (6) presses on the sealing seat (70) and presses the sealing seat (70) against the bottom of the inner cavity of the main body (1). The pressing head (2) and the main column (5) are connected to the connecting port (61). A first one-way valve device is provided between the columns (5) to allow the emulsion in the main column (5) to flow to the push head (2) but prevent the emulsion in the push head (2) from flowing to the main column (5); a second one-way valve device is provided between the plastic spring (6) and the inlet (11) of the main body to allow the emulsion to flow from the inlet (11) of the main body into the plastic spring (6) but prevent the emulsion in the plastic spring (6) from flowing out of the inlet (11) of the main body; the main body (1), the screw thread (3), the push head (2), the main column (5), the straw (4), the plastic spring (6), the pull rod (7), the plug (71), the lock cover (8), the first one-way valve device and the second one-way valve device are respectively made of plastic materials;A sealing seat (70) is provided between the plastic spring (6) and the body (1) to seal the two. The lower end of the pull rod (7) is fixed on the sealing seat (70). A bottom cavity (701) is provided at the bottom of the sealing seat (70). A through hole (702) is provided on the sealing seat (70) to connect the plastic spring (6) and the bottom cavity (701). The bottom cavity (701) is connected to the inlet (11) of the body. A second positioning groove (704) is provided at the bottom of the sealing seat (70), and the second one-way valve device is positioned in the second positioning groove (704).

2. The all-plastic lotion pump according to claim 1, characterized in that: The lock cover (8) is sleeved on the outside of the main column (5), and a waterproof cover (9) is provided between the lock cover (8) and the main column (5) for blocking the gap between the upper end of the lock cover (8) and the main column (5).

3. The all-plastic lotion pump according to claim 1, characterized in that: The plastic spring (6) and the main column (5) are buckled and connected to prevent the two from being separated up and down.

4. The all-plastic lotion pump according to claim 3, characterized in that: The upper end of the plastic spring (6) is provided with an annular buckling portion (62) which is inserted into the main column (5) from the lower end of the main column, the outer side surface of the buckling portion (62) is sealedly connected to the inner side surface of the main column (5), the connecting port (61) is provided on the plastic spring (6) and is located on the inner side of the buckling portion (62), a second buckling ring (63) protrudes from the outer side of the buckling portion (62), and the inner wall of the main column (5) is provided with a concave second buckling groove (51) which is buckled with the second buckling ring (63).

5. The all-plastic lotion pump according to claim 4, characterized in that: The upper end of the plastic spring (6) is located outside the buckle portion (62) and is provided with an annular end surface (64) that can be sealed with the lower end surface of the main column (5). When the main column (5) is pressed downward, the lower end surface of the main column (5) is pressed on the annular end surface (64) and a seal is formed between the two end surfaces.

6. The all-plastic lotion pump according to claim 4, characterized in that: The inner holes at the lower ends of the buckling portion (62) and the main column (5) are circular, and the second buckling ring (63) and the second buckling groove (51) are correspondingly annular, so that the main column (5) can rotate relative to the plastic spring (6) under the action of an external force. A guide structure for guiding the main column (5) to move up and down is provided between the lock cover (8) and the main column (5). When the main column (5) rotates relative to the lock cover (8), the guide structure is dislocated and prevents the main column (5) from moving up and down.

7. The all-plastic lotion pump according to claim 1, characterized in that: The first one-way valve device comprises a first valve core (10), a main column outlet (52) connected to the push head (2) is provided in the main column (5), the first valve core (10) comprises a first outer ring (101) fixed between the push head (2) and the main column (5), a first inner core (102) is provided on the inner side of the first outer ring (101) and is isolated from the first outer ring (101) and covers the main column outlet (52) from the push head (2) side, the first outer ring (101) and the first inner core (102) are elastically connected by a first rib (103) so that the first inner core (102) can float upward when the bottom is pressurized, thereby opening the main column outlet (52).

8. The all-plastic lotion pump according to claim 1, characterized in that: The second one-way valve device comprises a second valve core (20), the second valve core (20) is located in the bottom cavity (701), the second valve core (20) comprises a second outer ring (201) fixed between the sealing seat (70) and the body (1), the inner side of the second outer ring (201) is provided with a second inner core (202) which is isolated from the second outer ring (201) and covers the inlet (11) of the body from the side of the bottom cavity (701), the second outer ring (201) and the second inner core (202) are elastically connected by a second rib (203) so that the second inner core (202) can float upward when the bottom is pressurized, thereby opening the inlet (11) of the body.

9. The all-plastic lotion pump according to claim 1, characterized in that: The sealing seat (70) is provided with a sealing groove (703) for the lower end of the plastic spring (6) to be inserted, and the lower end surface of the plastic spring (6) is pressed on the bottom of the sealing groove (703) and is sealed with the bottom of the sealing groove (703). Under the elastic pressure of the plastic spring (6), the bottom surface of the sealing seat (70) is tightly fitted on the bottom of the inner cavity of the main body (1) and a seal is formed between the bottom surface of the sealing seat (70) and the bottom of the inner cavity of the main body (1).

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