A pump head

Abstract

This utility model discloses a pump head designed to improve the sealing performance of a piston. It includes a body with a chamber, one end of which is connected to a liquid inlet tube communicating with the chamber. A piston and a locking cap are located within the chamber. The locking cap is positioned on the side of the piston furthest from the liquid inlet tube, and a hollow first pump rod passes through it. The piston has a first lip and a first annular protrusion at its end near the locking cap, and a second lip at its end furthest from the locking cap. The first pump rod is fitted onto the first annular protrusion. Both the first and second lips contact the inner wall of the chamber to achieve a seal, forming a first annular groove between the first lip and the first annular protrusion. The outer wall of the first pump rod has a first annular flange located within the chamber, between the piston and the locking cap. A first spring is fitted onto the first pump rod, with one end contacting the first annular flange and the other end embedded in the first annular groove. This invention belongs to the technical field of spray equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of spray equipment, and more specifically, relates to a pump head. Background Technology

[0002] Currently, perfumes generally use a press-type pump head, which can spray the perfume in a mist form.

[0003] Most existing push-type pump heads are equipped with a pump rod, spring, and piston. The piston is used to achieve sealing, and the spring is used to allow the pump rod to rise and fall elastically. Pressing the pump rod draws the perfume out and completes the spraying.

[0004] Among them, the pistons are basically single-lip seals, which are not sealing enough and are prone to leakage. Utility Model Content

[0005] The main purpose of this invention is to provide a pump head that improves the sealing performance of the piston.

[0006] According to a first aspect of the present invention, a pump head is provided, comprising a body having a chamber, a liquid inlet tube inserted into one end of the body, the liquid inlet tube communicating with the chamber, a piston and a locking cover being provided in the chamber, the locking cover being disposed on the side of the piston away from the liquid inlet tube, and a hollow first pump rod passing through the locking cover;

[0007] The piston has a first lip and a first annular protrusion at the end near the lock cover, and a second lip at the end away from the lock cover. The first pump rod is sleeved on the first annular protrusion. Both the first lip and the second lip are in contact with the inner wall of the chamber to achieve a seal. The first lip and the first annular protrusion form a first annular groove.

[0008] The outer wall of the first pump rod is provided with a first annular flange, the first annular flange is located in the chamber, the first annular flange is located between the piston and the locking cover, and a first spring is sleeved on the first pump rod, one end of the first spring contacts the first annular flange, and the other end of the first spring is embedded in the first annular groove.

[0009] In the pump head described above, the main body is provided with a hollow column that communicates with the chamber, the hollow column is provided with a partition, and the partition is provided with a through hole;

[0010] The partition plate and the end of the hollow column away from the main body form a mounting hole, and the liquid guide tube is inserted into the mounting hole.

[0011] The partition and the chamber form a positioning groove, and a pump ball is provided in the positioning groove.

[0012] In the pump head described above, at least two limiting plates are evenly distributed around the positioning groove on the inner wall of the body, and the limiting plates extend in the axial direction of the hollow column away from the positioning groove.

[0013] In the pump head described above, the end of the limiting plate away from the positioning groove in its extending direction is bent in a direction close to the axis of the hollow column.

[0014] In the aforementioned pump head, the pump ball is made of stainless steel.

[0015] In the pump head described above, the first pump rod has a first groove at the end near the piston, the first groove is fitted onto the first annular protrusion, and there is a gap between the end of the first annular protrusion facing away from the liquid inlet tube and the bottom of the first groove.

[0016] The chamber is provided with a second pump rod and a second spring. The second pump rod is fixedly connected to the first pump rod. The second spring is located between the liquid inlet tube and the piston. One end of the second spring is connected to the second pump rod, and the other end of the second spring is in contact with the inner wall of the body.

[0017] The second pump rod is provided with a liquid passage hole, which connects the chamber with the interior of the first pump rod;

[0018] The piston has a second annular protrusion at the end away from the locking cover. The second annular protrusion and the second lip form a second annular groove. The second pump rod has a third annular protrusion. The second annular groove is used to contact and seal with the third annular protrusion. The liquid passage is located on the side of the third annular protrusion away from the liquid inlet tube.

[0019] In the pump head described above, the second pump rod includes a rod portion and a push portion connected in sequence. The rod portion passes through the piston and is connected to the interior of the first pump rod. The push portion is located on the side of the piston near the liquid inlet tube. The side of the push portion facing away from the piston is provided with a receiving groove, and the second spring is located in the receiving groove.

[0020] The first annular protrusion is located between the first pump rod and the rod portion;

[0021] The liquid passage is located on the rod portion, and the third annular protrusion is located on the side of the push portion near the piston, and the third annular protrusion is arranged around the rod portion.

[0022] In the pump head described above, the third annular protrusion and the rod portion form a third annular groove, and the second annular protrusion is located in the third annular groove.

[0023] In the pump head described above, the end of the first pump rod furthest from the main body is connected to a mist outlet.

[0024] In the pump head described above, the first pump rod is fitted with a buckle for connecting the perfume bottle body, and the buckle is located between the mist outlet and the main body.

[0025] One of the above-described technical solutions of this utility model has at least one of the following advantages or beneficial effects:

[0026] In this invention, the piston has a first lip and a second lip, both of which are in contact with the inner wall of the chamber, forming two sealing structures to achieve bidirectional sealing, resulting in better sealing performance and reduced leakage rate.

[0027] At the same time, a limit plate is set to restrict the pump ball, which allows the pump ball to move up and down, while preventing the pump ball from completely coming out, ensuring that the pump ball resets accurately and does not deviate. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0029] Figure 1 This is a cross-sectional view of the first embodiment of the present invention;

[0030] Figure 2 This is the first embodiment of the present utility model. Figure 1 A magnified view of part A.

[0031] The figure labels for each figure are as follows:

[0032] 1. Body; 11. Hollow cylinder; 12. Partition; 13. Positioning groove; 14. Limiting plate; 15. Buckle; 2. Liquid inlet tube; 3. Piston; 31. First lip; 32. First annular protrusion; 33. Second lip; 34. Second annular protrusion; 4. Locking cap; 5. First pump rod; 51. First annular flange; 52. First groove; 6. First spring; 7. Pump ball; 8. Second pump rod; 81. Rod part; 811. Liquid passage hole; 82. Pushing part; 83. Receiving groove; 84. Third annular protrusion; 9. Second spring; 10. Mist outlet; 101. Nozzle. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] The following disclosure provides many different implementation methods or examples for different solutions to implement this utility model.

[0035] Reference Figures 1 to 2 As shown, a pump head includes a body 1 with a chamber. One end of the body 1 is inserted with a liquid inlet tube 2, which communicates with the chamber. The chamber is provided with a piston 3 and a locking cover 4. The locking cover 4 is located on the side of the piston 3 away from the liquid inlet tube 2. The locking cover 4 is used to fix the piston 3 and provide additional sealing. A hollow first pump rod 5 is passed through the locking cover 4.

[0036] The piston 3 has a first lip 31 and a first annular protrusion 32 at the end near the lock cover 4, and a second lip 33 and a second annular protrusion 34 at the end away from the lock cover 4; the first pump rod 5 is fitted on the first annular protrusion 32, and both the first lip 31 and the second lip 33 are in contact with the inner wall of the chamber, forming two sealing structures to achieve bidirectional sealing, better sealing performance, and reduced leakage rate; the first lip 31 and the first annular protrusion 32 form a first annular groove; the second annular protrusion 34 and the second lip 33 form a second annular groove.

[0037] The outer wall of the first pump rod 5 is provided with a first annular flange 51. The first annular flange 51 is located in the chamber and between the piston 3 and the lock cover 4. A first spring 6 is sleeved on the first pump rod 5. One end of the first spring 6 contacts the first annular flange 51, and the other end of the first spring 6 is embedded in the first annular groove.

[0038] The first pump rod 5 has a first groove 52 at one end near the piston 3. The first groove 52 is fitted onto the first annular protrusion 32. There is a gap between the end of the first annular protrusion 32 facing away from the liquid inlet tube 2 and the bottom of the first groove 52.

[0039] The chamber is provided with a second pump rod 8 and a second spring 9. The second pump rod 8 is fixedly connected to the first pump rod 5. The second spring 9 is located between the liquid inlet tube 2 and the piston 3. The second pump rod 8 includes a rod part 81 and a pushing part 82 connected in sequence. The rod part 81 passes through the piston 3 and is connected to the inside of the first pump rod 5 so that the first annular protrusion 32 is located between the first pump rod 5 and the rod part 51. The pushing part 82 is located on the side of the piston 3 near the liquid inlet tube 2. The side of the pushing part 82 facing away from the piston 3 is provided with a receiving groove 83. The second spring 9 is located in the receiving groove 83 and is supported between the pushing part 82 and the bottom of the chamber.

[0040] The rod 81 is provided with a liquid passage hole 811, which connects the chamber with the interior of the first pump rod 5;

[0041] The pusher 82 has a third annular protrusion 84 on the side near the piston 3. The third annular protrusion 84 is arranged around the rod 81. The second annular groove is used to contact and seal with the third annular protrusion 84.

[0042] Generally, the first pump rod 5 is in a vertical position, and the piston 3 and the bottom of the chamber form a pump chamber. When the first pump rod 5 is not pressed, the second annular groove and the third annular protrusion 84 are in contact and sealed, and the piston 3 will close the liquid passage 811 to prevent liquid in the chamber from flowing into the first pump rod 5 through the liquid passage 811. When the first pump rod 5 is pressed, the first annular flange 51 presses the first spring 6, and then the first spring 6 presses the piston 3 to move. The piston 3 will squeeze the pump chamber, and the pressure in the pump chamber will gradually increase. There is a gap between the end of the annular protrusion 32 facing away from the liquid inlet tube 2 and the bottom of the first groove 52. When the force of the first spring 6 is less than the pressure in the pump chamber, the piston 3 compresses the first spring 6, the piston 3 is opened, and the second annular groove will not contact the third annular protrusion 84. At this time, the liquid in the chamber can flow to the liquid passage hole 811 and flow into the interior of the first pump rod 5 through the liquid passage hole 811 to realize liquid spraying. As the liquid is sprayed out, after the pressure in the pump chamber is restored, the first spring 6 will reset the piston 3 and stop the liquid spraying.

[0043] When the first pump rod 5 is pressed, the second pump rod 8 will also be pressed down simultaneously, compressing the second spring 9. After the first pump rod 5 is released, the second spring 9 will cause the first pump rod 5 and the second pump rod 8 to return to their original positions.

[0044] In this embodiment, a blind hole is provided in the rod portion 81, and the rod portion 81 is connected to the interior of the first pump rod 5, so that the blind hole of the rod portion 81 communicates with the interior of the first pump rod 5. The liquid passage hole 811 is connected to the blind hole, so that liquid can flow into the interior of the first pump rod 5.

[0045] In this embodiment, the main body 1 is provided with a hollow column 11 that communicates with the chamber, and a partition 12 is provided inside the hollow column 11, and a through hole is provided on the partition 12.

[0046] The partition 12 and the end of the hollow column 11 away from the main body 1 form an installation hole, and the liquid inlet tube 2 is inserted into the installation hole; the liquid inlet tube 2 will communicate with the inside of the perfume bottle body, and the liquid drawn by the liquid inlet tube 2 can enter the chamber through the through hole.

[0047] The partition 12 and the chamber form a positioning groove 13, and the positioning groove 13 is provided with a pump ball 7; at least two limiting plates 14 are evenly distributed around the positioning groove 13 on the inner wall of the body 1, and the limiting plates 14 extend in the axial direction of the hollow column 11 in a direction away from the positioning groove 13.

[0048] During the downward pressing of the first pump rod 5, the pump ball 7 is embedded in the positioning groove 13 by its own weight, thereby blocking the through hole and preventing liquid from returning from the pump chamber to the perfume bottle; after the first pump rod 5 is released, the first spring 6 and the second spring 9 return to their original positions, pushing the second pump rod 8 and the first pump rod 5 to reset, and the pump chamber also tends to return to its original position, forming a negative pressure, thereby allowing the liquid inlet tube 2 to draw liquid, and the liquid will push the pump ball 7 open and enter the pump chamber;

[0049] The limiting plate 14 can limit the pump ball 7, which allows the pump ball 7 to have room to rise and fall, and prevents the pump ball 7 from completely coming out, ensuring that the pump ball 7 is accurately reset and will not deviate.

[0050] Meanwhile, the limiting plate 14 can form a positioning structure, and the second spring 9 can be fitted onto this positioning structure, which facilitates the arrangement of the second spring 9.

[0051] Specifically, the end of the limiting plate 14 away from the positioning groove 13 in its extension direction is bent along the axis close to the hollow column 11. Therefore, the ends of each limiting plate 14 away from the positioning groove 13 will come together to prevent the pump ball 7 from falling out.

[0052] In this embodiment, the pump bead 7 is made of stainless steel to prevent rusting, and it also provides a better sealing effect when blocking the through hole.

[0053] In this embodiment, the third annular protrusion 84 and the rod portion 81 form a third annular groove; the second annular protrusion 34 is located in the third annular groove, which facilitates the support and positioning of the piston 3.

[0054] In this embodiment, the end of the first pump rod 5 away from the body 1 is connected to a mist outlet 10, and the mist outlet 10 is provided with a nozzle 101. The interior of the first pump rod 5 is connected to the nozzle 101, so that liquid can be sprayed out from the nozzle 101.

[0055] Furthermore, an aluminum cap can be fitted over the outside of the mist outlet 10 to protect it.

[0056] In this embodiment, a buckle 15 for connecting the perfume bottle body is sleeved on the first pump rod 5. The buckle 15 is located between the mist outlet 10 and the main body 1. The buckle 15 can be fastened to the perfume bottle body, so that the main body 1 can enter the perfume bottle.

[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pump head, characterized in that, The device includes a body with a chamber, one end of which is inserted with a liquid inlet tube that communicates with the chamber. The chamber contains a piston and a locking cap. The locking cap is located on the side of the piston away from the liquid inlet tube, and a hollow first pump rod passes through the locking cap. The piston has a first lip and a first annular protrusion at the end near the lock cover, and a second lip at the end away from the lock cover. The first pump rod is sleeved on the first annular protrusion. Both the first lip and the second lip are in contact with the inner wall of the chamber to achieve a seal. The first lip and the first annular protrusion form a first annular groove. The outer wall of the first pump rod is provided with a first annular flange, the first annular flange is located in the chamber, the first annular flange is located between the piston and the locking cover, and a first spring is sleeved on the first pump rod, one end of the first spring contacts the first annular flange, and the other end of the first spring is embedded in the first annular groove.

2. The pump head according to claim 1, characterized in that, The main body is provided with a hollow column that communicates with the cavity, and a partition is provided inside the hollow column, with through holes on the partition; The partition plate and the end of the hollow column away from the main body form a mounting hole, and the liquid guide tube is inserted into the mounting hole. The partition and the chamber form a positioning groove, and a pump ball is provided in the positioning groove.

3. The pump head according to claim 2, characterized in that, At least two limiting plates are evenly distributed around the positioning groove on the inner wall of the body, and the limiting plates extend in the axial direction of the hollow column away from the positioning groove.

4. The pump head according to claim 3, characterized in that, The limiting plate is bent at one end away from the positioning groove in its extending direction along the axis close to the hollow column.

5. The pump head according to claim 2, characterized in that, The pump ball is made of stainless steel.

6. The pump head according to claim 1, characterized in that, The first pump rod has a first groove at one end near the piston, the first groove is fitted onto the first annular protrusion, and there is a gap between the end of the first annular protrusion facing away from the liquid inlet tube and the bottom of the first groove; The chamber is provided with a second pump rod and a second spring. The second pump rod is fixedly connected to the first pump rod. The second spring is located between the liquid inlet tube and the piston. One end of the second spring is connected to the second pump rod, and the other end of the second spring is in contact with the inner wall of the body. The second pump rod is provided with a liquid passage hole, which connects the chamber with the interior of the first pump rod; The piston has a second annular protrusion at the end away from the locking cover. The second annular protrusion and the second lip form a second annular groove. The second pump rod has a third annular protrusion. The second annular groove is used to contact and seal with the third annular protrusion. The liquid passage is located on the side of the third annular protrusion away from the liquid inlet tube.

7. The pump head according to claim 6, characterized in that, The second pump rod includes a rod portion and a push portion connected in sequence. The rod portion passes through the piston and is connected to the interior of the first pump rod. The push portion is located on the side of the piston near the liquid inlet tube. The side of the push portion facing away from the piston is provided with a receiving groove, and the second spring is located in the receiving groove. The first annular protrusion is located between the first pump rod and the rod portion; The liquid passage is located on the rod portion, and the third annular protrusion is located on the side of the push portion near the piston, and the third annular protrusion is arranged around the rod portion.

8. The pump head according to claim 7, characterized in that, The third annular protrusion and the rod portion form a third annular groove, and the second annular protrusion is located in the third annular groove.

9. The pump head according to claim 1, characterized in that, The end of the first pump rod furthest from the main body is connected to a mist outlet.

10. The pump head according to claim 9, characterized in that, The first pump rod is fitted with a buckle for connecting the perfume bottle body, and the buckle is located between the mist outlet and the main body.

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