Anti-dripping back-sucking emulsion pump

Abstract

The invention discloses an anti-dripping back-sucking emulsion pump which comprises a spray head, an upper pipe, a spring, a nut, a shell, a second one-way valve and a lower pipe, the spray head comprises a nozzle, a center rod, a clamping pipe and an insertion pipe, the center rod, the clamping pipe and the insertion pipe are coaxially arranged, and the insertion pipe is inserted into the shell; the upper end of the upper pipe is inserted between the central rod and the clamping pipe; a conducting groove is formed in the side face, facing the clamping pipe, of the top end of the upper pipe, the nozzle is communicated with the conducting groove, and a first through hole is formed in the side wall of the upper pipe; an elastic bag is arranged between the spray head and the upper pipe, the elastic bag is provided with an inner cavity, and the first through hole is communicated with the conduction groove through the elastic bag. The elastic bag drives the spray head to rise and rebound, in the rebound process, negative pressure is formed in the elastic bag, and liquid in the spray nozzle is sucked through the conduction groove to flow back into the elastic bag. And until the elastic bag rebounds to the maximum volume, the liquid flows into the upper pipe from the elastic bag through the first through hole and flows into the packaging tin through the upper pipe.

Description

Technical Field

[0001] The present invention relates to a drip-proof and re-suckable emulsion pump, and particularly to its re-suck structure, belonging to the field of emulsion pumps. Background Art

[0002] Emulsion pumps are often used on liquid cosmetic packaging cans to output a small amount of liquid in the packaging can. However, existing emulsion pumps have deficiencies. After the liquid is output, a small amount of liquid remains in the flow channel of the nozzle. Due to its viscosity, it does not flow out immediately. After a certain period of time, it drips out drop by drop from the nozzle. This part of the liquid is not utilized, resulting in waste. Summary of the Invention

[0003] To overcome the above drawbacks, the purpose of the present invention is to provide a drip-proof and re-suckable emulsion pump. After the liquid is ejected, the liquid in the nozzle is re-sucked to prevent the liquid from dripping out of the nozzle by itself.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a drip-proof and re-suckable emulsion pump, including a spray head, an upper tube, a spring, a nut, a housing, a second one-way valve, and a lower tube. The spray head includes a nozzle, and a central rod, a clamping tube, and an insertion tube coaxially arranged. The insertion tube is inserted into the housing; the upper end of the upper tube is inserted between the central rod and the clamping tube, and a first one-way valve is arranged between the lower end of the upper tube and the housing; a second one-way valve is arranged in the middle of the housing, and the end is inserted into the lower tube; the first one-way valve and the second one-way valve only allow the emulsion to flow from bottom to top; the housing penetrates through the nut and is coaxially connected; the spring is sleeved on the upper tube to drive the upper tube to move upward;

[0005] A conduction groove is arranged on the top of the upper tube facing the side of the clamping tube. The nozzle is communicated with the conduction groove, and a first through hole is arranged on the side wall of the upper tube; an elastic capsule is arranged between the spray head and the upper tube. The elastic capsule has an inner cavity, and the first through hole and the conduction groove are communicated through the elastic capsule.

[0006] Compared with the prior art, the beneficial effects of the present invention are: the spring drives the upper tube to rise and rebound, and the elastic capsule drives the spray head to rise and rebound. During the rebound process, a negative pressure is formed inside the elastic capsule, and the liquid in the nozzle is attracted to flow back into the elastic capsule through the conduction groove. Until the elastic capsule rebounds to the maximum volume, the liquid flows from the elastic capsule into the upper tube through the first through hole and then into the packaging can through the upper tube for reuse. The re-suck stability is improved through the synergistic effect of the elastic capsule and the spring, and the failure caused by the aging of the elastic capsule is avoided. The elastic capsule and the spring are separately arranged at intervals. The size of the inner cavity is determined according to the volume of the liquid in the nozzle to completely re-suck the liquid in the nozzle and preferably not re-suck air. The next time the spray head is pressed to output liquid, there is no need to output the air in the elastic capsule. The length of the spring is determined by the volume of liquid output by pressing the spray head once. The raw material consumption of the spray head and the spring can be saved. Description of the Drawings

[0007] Figure 1 Schematic structural diagram of a drip-proof and re-suckable emulsion pump shown in a preferred embodiment of the present invention;

[0008] Figure 2 Partial structural diagram of a drip-proof and re-suckable emulsion pump;

[0009] Figure 3 Schematic structural diagram of a nozzle;

[0010] Figure 4 Schematic structural diagram of an elastic bladder;

[0011] Figure 5 Schematic structural diagram of an upper tube;

[0012] Figure 6 Schematic structural diagram of an inner shell;

[0013] Figure 7 Schematic structural diagram of an outer shell;

[0014] Figure 8 Schematic structural diagram of a nut;

[0015] Figure 9 Schematic structural diagram of a bottom plate;

[0016] Figure 10 Schematic structural diagram of a first one-way valve and a second one-way valve.

[0017] In the figure: 1, nozzle; 2, elastic bladder; 3, upper tube; 4, spring; 5, nut; 6, outer shell; 7, inner shell; 8, piston; 9, bottom plate; 10, second one-way valve; 11, lower tube; 12, nozzle; 13, central rod; 14, clamping tube; 15, first convex ring; 16, insertion tube; 21, clamping portion; 22, second convex ring; 23, bottom ring; 24, first body; 25, inner cavity; 31, third convex ring; 32, first through hole; 33, second body; 34, fourth convex ring; 35, conduction groove; 36, fifth convex ring; 37, first groove; 38, sixth convex ring; 51, second groove; 52, second through hole; 53, fourth body; 61, upper part; 62, lower part; 63, balance hole; 64, convex strip; 65, third groove; 66, eighth convex ring; 67, ninth convex ring; 68, insertion port; 71, third body; 72, toothed ring; 73, tenth convex ring; 74, fourth groove; 75, retaining ring; 76, docking portion; 91, fifth body; 92, eleventh convex ring; 93, third through hole; 94, support plate; 101, retaining ring; 102, spherical ball; 103, conical tube. Detailed implementation manners

[0018] The following describes the preferred embodiments of the present invention in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] See the attached Figure 1-10 As shown, a drip-proof and re-suckable emulsion pump in this embodiment includes a nozzle 1, an upper tube 3, a spring 4, a nut 5, a housing 6, an inner housing 10, and a lower tube 11. The nozzle 1 includes a nozzle 12, and a central rod 13, a clamping tube 14, a first convex ring 15, and an insertion tube 16 coaxially arranged. The first convex ring 15 is inserted into the housing 6; the upper end of the upper tube 3 is inserted between the central rod 13 and the clamping tube 14, and a first one-way valve is arranged between the lower end of the upper tube 3 and the housing 6; an inner housing 10 is arranged in the middle of the housing 6, and the lower end is inserted with the lower tube 11; the first one-way valve and the inner housing 10 only allow the emulsion to flow from bottom to top; the housing 6 passes through the nut 5 and is coaxially connected; the spring 4 is sleeved on the upper tube 3 to drive the upper tube 3 to move upward; a conduction groove 35 is arranged on the top end of the upper tube 3 facing the side of the clamping tube 14, the nozzle 12 is communicated with the conduction groove 35, and a first through hole 32 is arranged on the side wall of the upper tube 3; an elastic bladder 2 is arranged between the nozzle 1 and the upper tube 3, the elastic bladder 2 has an inner cavity 25, and the first through hole 32 and the conduction groove 35 are communicated through the elastic bladder 2.

[0020] The spring 4 drives the upper tube 3 to rise and rebound, and the elastic bladder 2 drives the nozzle 1 to rise and rebound. During the rebound process, a negative pressure is formed inside the elastic bladder 2, and the liquid in the nozzle 1 is attracted to flow back into the elastic bladder 2 through the conduction groove 35. Until the elastic bladder 2 rebounds to the maximum volume, the liquid flows from the elastic bladder 2 into the upper tube 3 through the first through hole 32, and then into the packaging can through the upper tube 3 for reuse. The re-suck stability is improved through the synergistic effect of the elastic bladder 2 and the spring 4, and the failure caused by the aging of the elastic bladder 2 is avoided. The elastic bladder 2 and the spring 4 are separately arranged and spaced by a third convex ring 31. The size of the inner cavity 25 is determined according to the volume of the liquid in the nozzle 1, so as to completely re-suck the liquid in the nozzle 1 and preferably no air is re-sucked. When pressing the nozzle 1 to output liquid next time, there is no need to output the air in the elastic bladder 2. The length of the spring 4 is determined according to the volume of the liquid output by pressing the nozzle 1 once. The raw material consumption of the nozzle 1 and the spring 4 can be saved. In this embodiment, the elastic bladder 2 and the spring 4 rebound simultaneously. In other embodiments, the elastic bladder 2 and the spring 4 can also rebound separately. For example, the spring 4 drives the upper tube 3 to rise and rebound. After the spring 4 is fully extended, the elastic bladder 2 starts to rebound. When the elastic bladder 2 starts to rebound, the liquid in the nozzle 1 has been stationary, and only a small pressure difference is required to re-suck the liquid. The flow direction and path of the liquid during the re-suck process are as Figure 2 indicated by the arrows in

[0021] To facilitate the separate setting of the elastic bladder 2 and the spring 4, the present invention is further configured as follows: a third convex ring 31 is provided in the middle of the upper tube 3, and the lower end of the elastic bladder 2 abuts against the upper surface of the third convex ring 31; the upper end of the spring 4 abuts against the lower surface of the third convex ring 31.

[0022] The elastic bladder 2 includes a clamping portion 21, a second convex ring 22, a bottom ring 23, and a first body 24 connected in sequence. The clamping portion 21 is sleeved between the clamping tube 14 and the first convex ring 15. The inner diameter of the clamping portion 21 is larger than the inner diameter of the bottom ring 23. The first body 24 has an inner cavity 25 and surrounds the upper tube 3; the first through hole 32 and the conduction groove 35 are communicated through the first body 24. A second convex ring 22 is provided on the inner wall of the clamping portion 21. A first convex ring 15 is provided on the inner side of the end of the clamping tube 14. The upper tube 3 includes a third convex ring 31, a first through hole 32, a second body 33, a fourth convex ring 34, a conduction groove 35, a fifth convex ring 36, a first groove 37, and a sixth convex ring 38. A fourth convex ring 34 is provided on the outer side of the top end of the second body 33. The first convex ring 15 and the fourth convex ring 34 are snap-connected. The first body 24 is an annular body with a C-shaped cross-section. The upper end of the first body 24 is easily deformed under the pressure of the clamping tube 14, and the inner cavity 25 shrinks to reduce the volume. When the first body 24 is not subject to external force, it expands automatically, and the volume of the inner cavity 25 becomes larger, and the liquid is sucked back through the conduction groove 35 and the nozzle 12.

[0023] The first one-way valve includes an inner shell 7, a piston 8, and a bottom plate 9. The inner shell 7 is fixedly connected to the inner wall of the outer shell 6. The upper tube 3 slides up and down in the inner shell 7. The bottom plate 9 is inserted into the bottom end of the upper tube 3. The inner diameter of the piston 8 is slidably connected to the bottom plate 9; the bottom plate 9 includes a fifth body 91, an eleventh convex ring 92, and a support plate 94. A support plate 94 is connected to the lower end of the fifth body 91. A third through hole 93 is provided on the side, and a number of eleventh convex rings 92 are provided on the outer wall of the upper end. When the piston 8 abuts against the support plate 94, the piston 8 blocks the third through hole 93. When the upper tube 3 moves downward, the bottom plate 9 moves accordingly. The piston 8 is sleeved on the upper end of the bottom plate 9, and the liquid in the lower part 62 enters the fifth body 91 through the third through hole 93 and then enters the upper tube 3 through the fifth body 91. At this time, a positive pressure is formed in the lower part 62, and the inner shell 10 closes. When the upper tube 3 moves upward, the bottom plate 9 moves accordingly. The piston 8 is sleeved on the lower end of the bottom plate 9, and the inner wall of the piston 8 blocks the third through hole 93, forming a negative pressure in the lower part 62, and the inner shell 10 opens. The liquid in the packaging can passes through the lower tube 11 and the inner shell 10 and enters the lower part 62.

[0024] The further setting of the present invention is as follows: The second one-way valve 10 includes a retaining ring 101, a spherical ball 102, and a tapered tube 103. The retaining ring 101 and the tapered tube 103 are arranged on the inner wall of the outer shell 6. The retaining ring 101 includes a number of retaining claws arranged at intervals in a ring shape. The diameter of the spherical ball 102 is smaller than the diameter of the outer shell 6, and the spherical ball 102 can only move up and down between the retaining ring 101 and the tapered tube 103. When the spherical ball 102 contacts the tapered tube 103, the liquid in the lower part 62 cannot pass through the tapered tube 103 and enter the lower tube 11. At this time, the inner shell 10 is in a closed state. When the spherical ball 102 contacts the retaining ring 101, the liquid in the lower tube 11 passes through the tapered tube 103, the spherical ball 102, and the gaps between a number of retaining claws, and enters the first through hole 32. At this time, the inner shell 10 is in an open state.

[0025] In order to lift the piston 8 upward, the further setting of the present invention is as follows: A number of eleventh convex rings 92 are arranged on the outer wall of the upper end of the bottom plate 9, and a number of first grooves 37 are arranged on the inner wall of the upper tube 3. The eleventh convex rings 92 and the first grooves 37 are snap-connected; A sixth convex ring 38 is also arranged on the inner wall of the upper tube 3. The sixth convex ring 38 further strengthens the connection strength between the fifth body 91 and the upper tube 3.

[0026] In order to facilitate the installation of the anti-drip and re-suckable emulsion pump on the packaging can, the further setting of the present invention is as follows: The nut 5 includes a fourth body 53. A second through hole 52 is arranged at the center of the fourth body 53, and a second groove 51 is arranged on the inner wall of the second through hole 52. An eighth convex ring 66 is arranged at the top end of the outer shell 6. The second groove 51 and the eighth convex ring 66 are snap-connected. By rotating the fourth body 53, the inner wall of the fourth body 53 is screwed to the packaging can, and the fourth body 53 pushes the ninth convex ring 67 until the ninth convex ring 67 is clamped by the second groove 51 and the packaging can.

[0027] The outer shell 6 includes an upper part 61, a lower part 62, a number of convex strips 64, and a ninth convex ring 67. The inner shell 7 includes a third body 71, a toothed ring 72, a tenth convex ring 73, a fourth groove 74, a retaining ring 75, and a docking part 76. The toothed ring 72 is connected to the outer side wall of the lower end of the third body 71. The lower surface of the toothed ring 72 is connected to the docking part 76. A tenth convex ring 73 is arranged on the outer side of the docking part 76. A fourth groove 74 is formed between the docking part 76 and the third body 71. A retaining ring 75 is connected to the inner wall of the lower end of the third body 71. The lower end of the spring 4 extends into the third body 71 and abuts against the retaining ring 75. Due to the arrangement of the fourth groove 74, the docking part 76 and the third body 71 have better elasticity, avoiding the retaining ring 75 clamping the upper tube 3 too tightly. When the piston 8 moves upward, the top end extends into the bottom end of the third body 71 and abuts against the retaining ring 75, expanding the fourth groove 74. The retaining ring 75 clamps the upper tube 3 tightly, preventing the upper tube 3 from moving upward further.

[0028] A third groove 65 is provided at the connection between the upper part 61 and the lower part 62, and the third groove 65 is snap-connected to the tenth convex ring 73; a number of convex strips 64 are arranged in an annular array on the inner wall of the bottom end of the upper part 61, and the toothed ring 72 is inserted into the convex strips 64; a balance hole 63 is provided on the side wall of the top end of the lower part 62; an insertion port 68 is provided at the bottom end of the lower part 62, and the lower pipe 11 is inserted into the insertion port 68. The inner wall of the upper part 61 is slidably connected to the insertion pipe 16.

[0029] During the downward movement of the piston 8, the air in the packaging can enters the lower part 62 through the balance hole 63. During the upward movement of the piston 8, the air in the lower part 62 enters the packaging can. When the piston 8 makes a round trip, the pressure in the packaging can is constant.

[0030] A fifth convex ring 36 is provided on the inner wall of the top end of the upper pipe 3, and the fifth convex ring 36 is inclined downward. The fifth convex ring 36 strengthens the connection firmness between the second body 33 and the central rod 13.

Claims

1. An anti-drip and re-suckable emulsion pump, comprising a nozzle (1), an upper tube (3), a spring (4), a nut (5), a housing (6), a second one-way valve (10) and a lower tube (11). The nozzle (1) includes a nozzle (12), and a central rod (13), a clamping tube (14) and an inserting tube (16) which are coaxially arranged. The inserting tube (16) is inserted into the housing (6); the upper end of the upper tube (3) is inserted between the central rod (13) and the clamping tube (14), and a first one-way valve is arranged between the lower end of the upper tube (3) and the housing (6); a second one-way valve (10) is arranged in the middle of the housing (6), and the lower tube (11) is inserted at the end; the first one-way valve and the second one-way valve (10) only allow the emulsion to flow from bottom to top; the housing (6) passes through the nut (5) and is coaxially connected; the spring (4) is sleeved on the upper tube (3) to drive the upper tube (3) to move upward. It is characterized in that A conduction groove (35) is arranged on the top end of the upper tube (3) facing the side of the clamping tube (14). The nozzle (12) is communicated with the conduction groove (35), and a first through hole (32) is arranged on the side wall of the upper tube (3); an elastic bladder (2) is arranged between the nozzle (1) and the upper tube (3). The elastic bladder (2) has an inner cavity (25), and the first through hole (32) is communicated with the conduction groove (35) through the elastic bladder (2).

2. The anti-drip and re-suckable emulsion pump according to claim 1, characterized in that, A third convex ring (31) is arranged in the middle of the upper tube (3), and the lower end of the elastic bladder (2) abuts against the upper surface of the third convex ring (31); the upper end of the spring (4) abuts against the lower surface of the third convex ring (31).

3. The anti-drip and re-suckable emulsion pump according to claim 1, wherein The elastic bladder (2) includes a clamping part (21), a bottom ring (23) and a first body (24) which are connected in sequence. The clamping part (21) is sleeved between the clamping tube (14) and the inserting tube (16). The inner diameter of the clamping part (21) is larger than the inner diameter of the bottom ring (23). The first body (24) has the inner cavity (25) and surrounds the upper tube (3); the first through hole (32) is communicated with the conduction groove (35) through the first body (24).

4. The anti-drip and re-suckable emulsion pump according to claim 3, characterized in that, A second convex ring (22) is arranged on the inner wall of the clamping part (21).

5. The anti-drip and re-suckable emulsion pump according to claim 1, wherein, A first convex ring (15) is arranged on the inner side of the end of the clamping tube (14), and a fourth convex ring (34) is arranged on the outer side of the top end of the upper tube (3). The first convex ring (15) is snap-connected with the fourth convex ring (34).

6. The anti-drip and re-suckable emulsion pump according to claim 1, characterized in that, The first one-way valve includes an inner shell (7), a piston (8) and a bottom plate (9). The inner shell (7) is fixedly connected to the inner wall of the housing (6). The upper tube (3) slides up and down in the inner shell (7). The bottom plate (9) is inserted at the bottom end of the upper tube (3). The inner diameter of the piston (8) is slidably connected to the bottom plate (9); a support plate (94) is connected to the lower end of the bottom plate (9), and a third through hole (93) is arranged on the side. When the piston (8) abuts against the support plate (94), the piston (8) blocks the third through hole (93).

7. The anti-drip and re-suckable emulsion pump according to claim 1, wherein The second one-way valve (10) includes a retaining ring (101), a spherical ball (102) and a tapered tube (103). The retaining ring (101) and the tapered tube (103) are arranged on the inner wall of the housing (6). The retaining ring (101) includes a plurality of retaining claws arranged at intervals in a ring shape. The diameter of the spherical ball (102) is smaller than the diameter of the housing (6). The spherical ball (102) can only move up and down between the retaining ring (101) and the tapered tube (103).

8. The anti-drip and re-suckable emulsion pump according to claim 1, wherein, A plurality of eleventh convex rings (92) are arranged on the outer wall of the upper end of the bottom plate (9). A plurality of first grooves (37) are arranged on the inner wall of the upper tube (3). The eleventh convex rings (92) are snap-connected to the first grooves (37); a sixth convex ring (38) is also arranged on the inner wall of the upper tube (3).

9. The anti-drip and re-suckable emulsion pump according to claim 1, wherein The nut (5) includes a fourth body (53). A second through hole (52) is arranged at the center of the fourth body (53). A second groove (51) is arranged on the inner wall of the second through hole (52). An eighth convex ring (66) is arranged at the top end of the housing (6). The second groove (51) is snap-connected to the eighth convex ring (66).

10. The anti-drip and re-suckable emulsion pump according to claim 1, wherein The housing (6) includes an upper part (61), a lower part (62), a plurality of convex strips (64) and a ninth convex ring (67). The inner housing (7) includes a third body (71), a toothed ring (72), a tenth convex ring (73), a fourth groove (74), a retaining ring (75) and a docking part (76); the toothed ring (72) is connected to the outer side wall of the lower end of the third body (71). The lower surface of the toothed ring (72) is connected to the docking part (76). A tenth convex ring (73) is arranged on the outer side of the docking part (76). A fourth groove (74) is formed between the docking part (76) and the third body (71). A retaining ring (75) is connected to the inner wall of the lower end of the third body (71); the lower end of the spring (4) extends into the third body (71) and abuts against the retaining ring (75); when the piston (8) moves upward, the top end extends into the bottom end of the third body (71) and abuts against the retaining ring (75); A third groove (65) is arranged at the connection between the upper part (61) and the lower part (62). The third groove (65) is snap-connected to the tenth convex ring (73); a plurality of convex strips (64) are arranged in a circular array on the inner wall of the bottom end of the upper part (61). The toothed ring (72) is inserted into the convex strips (64); a balance hole (63) is arranged on the side wall of the top end of the lower part (62); an insertion port (68) is arranged at the bottom end of the lower part (62). The lower tube (11) is inserted into the insertion port (68).

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