Pump core and pump head

Abstract

The pump core comprises a shell, a fixing base, a first piston, a liquid outlet pipe, a connecting piece, a first spring and a second spring, the fixing base is fixedly installed at an opening in the upper end of the shell, the first piston is located in the shell, the liquid outlet pipe is in sealed sliding connection with the first piston, a first cavity is formed below the first piston, and the liquid outlet pipe is fixedly connected with the connecting piece; the connecting piece comprises a second piston, the second piston is located on the fixing base, the connecting piece and the fixing base are supported through a first spring, the second spring is located between the connecting piece and the first piston, a second cavity is formed among the connecting piece, the fixing base and the first piston, and the first cavity and the liquid outlet channel can be communicated through the first liquid inlet hole. According to the invention, after the pump core is pressed, the expanded second cavity is recovered to form a liquid return structure, and the movable block which is opened by pressing and manually closed is used for sealing the nozzle of the pressing head, so that the effect of reducing the pollution of the liquid in the bottle by the liquid at the nozzle is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cosmetic packaging, more particularly, to a pump core and a pump head. BACKGROUND

[0002] In the prior art, the press-type packaging bottle is widely used in daily chemical, medicine and other fields due to its convenient operation and controllable liquid output. The structure of the press-type packaging bottle comprises a bottle body, a liquid storage cavity, a press pump head and a nozzle. The press-type packaging bottle realizes quantitative liquid output by pressing. However, the existing products generally have the problem of residual liquid in the nozzle. After pressing, the liquid remains in the nozzle due to the pressure difference and capillary action, and cannot flow back completely. After the residual liquid is exposed to the air, the evaporation of water can easily lead to the concentration and crystallization of effective components, which can block the nozzle, affect use and even cause the packaging bottle to be scrapped. The residual liquid can easily attach dust and microorganisms, which can pollute the liquid in the bottle. For medicine and cosmetic products, the residual liquid can cause deterioration and failure, which can harm health. In addition, the residual liquid can also drip and cause stains or corrosion of the contact object. Therefore, a technical solution is needed to solve the above problems. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art, and to provide a pump core and a pump head that can seal the nozzle after absorbing the liquid in the nozzle.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] The present application discloses a pump core and a pump head, which comprises an outer shell, a fixed seat, a first piston, a liquid outlet pipe, a connecting piece, a first spring and a second spring. The fixed seat is fixedly installed at the upper end opening of the outer shell. The first piston is located in the outer shell. The liquid outlet pipe is in sealed sliding connection with the first piston. The part of the outer shell below the first piston forms a first chamber. The liquid outlet pipe is fixedly connected with the connecting piece. The connecting piece comprises a second piston. The second piston is located in the fixed seat. The connecting piece and the fixed seat are supported by the first spring. The liquid outlet pipe comprises a limiting block, which can abut against the lower end of the first piston. The second spring is located between the connecting piece and the first piston. The connecting piece, the fixed seat and the first piston form a second chamber. The liquid outlet pipe comprises a liquid outlet channel, a first liquid inlet hole and a second liquid inlet hole. The first liquid inlet hole can communicate the first chamber and the liquid outlet channel. The second liquid inlet hole communicates the liquid outlet channel and the second chamber.

[0006] Further, during the process of pressing the connecting piece along the axial direction, the first liquid inlet hole communicates the first chamber, the second chamber gradually decreases, and after the second chamber reaches the minimum, the first chamber gradually decreases. When the connecting piece is reset by the first spring, the first liquid inlet hole is blocked from communicating with the first chamber, and the first chamber and the second chamber gradually increase.

[0007] Further, the material of the first spring is metal material, and the material of the second spring is plastic material.

[0008] Further, the fixed seat is located in the shell, the fixed seat is fixed in interference fit with the shell, and a first sealing ring is arranged between the fixed seat and the shell.

[0009] Further, when the connecting piece is located at the highest position, the first piston is located at the highest position, the first piston abuts against the lower end of the fixed piece, and the limiting block abuts against the lower end of the first piston.

[0010] Further, the second piston is located on the outer wall of the connecting piece, and the second piston is integrally formed with the connecting piece.

[0011] The application further discloses a pump head, which comprises the pump core, the shoulder sleeve, the press head and the movable block, the pump core is fixedly installed on the shoulder sleeve, the press head is installed on the upper end of the connecting piece, the press head comprises a first channel and a second channel, the first channel is connected with the second channel and the liquid outlet pipe, the second channel is communicated with the outer sidewall of the press head, the movable block is slidably installed on the press head, and the movable block can block or communicate the first channel and the second channel.

[0012] Further, the shoulder sleeve comprises a guide seat, the support block is installed on the guide seat, the press head comprises a guide channel, the movable block is slidably installed on the guide channel, the movable block comprises an inclined opening, the upper end of the support plate is provided with an inclined surface corresponding to the inclined opening, and the press head is pressed downward so that the movable block is away from the second channel.

[0013] Further, the guide seat is provided with a mounting groove, a third spring is installed in the mounting groove, the lower end of the support block is located in the mounting groove, the support block is slidably connected with the mounting groove, the support block comprises a clamping plate, the clamping plate is obliquely arranged, the clamping plate can abut against the upper end of the guide seat, the press head comprises a notch and an abutting plate, the notch is located above the guide seat, the abutting plate is located in the notch, the guide seat is provided with a plug groove, and the abutting plate can be plugged into the plug groove.

[0014] Further, the width of the clamping plate is greater than the width of the plug groove, the width of the abutting plate is less than the width of the plug groove, the support block comprises a groove, the clamping plate can be elastically deformed, and the clamping plate can be pressed into the groove by the abutting plate.

[0015] The application has the following beneficial effects:

[0016] This invention utilizes a structure that retracts and expands the second chamber after the pump core is pressed to form a liquid return mechanism. This allows for the backflow of any remaining liquid in the pump head that has not been pumped out. The pump head's nozzle is sealed by a movable block that can be opened by pressing and closed manually. This reduces the deterioration and drying of the liquid inside the pump head and minimizes contamination of the bottle with the liquid from the nozzle. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of Embodiment 1.

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0019] Figure 3 This is a cross-sectional view of Embodiment 2.

[0020] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0021] Figure 5 for Figure 3 A magnified view of a specific area.

[0022] Reference numerals: 1. Pump core; 11. Housing; 12. Fixing base; 121. First sealing ring; 13. First piston; 14. Discharge pipe; 141. Discharge channel; 142. First inlet hole; 143. Second inlet hole; 144. Limiting block; 15. Connecting piece; 151. Second piston; 16. First spring; 17. Second spring; 101. First chamber; 102. Second chamber; 2. Shoulder sleeve; 21. Guide seat; 211. Mounting groove; 212. Slot; 213. Third spring; 3. Push head; 31. First channel; 32. Second channel; 33. Guide channel; 331. Second sealing ring; 34. Notch; 35. Abutment plate; 351. Abutment block; 4. Movable block; 41. Slanted opening; 5. Support block; 51. Slanted surface; 52. Clamping plate; 53. Groove. Detailed Implementation

[0023] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1:

[0025] like Figure 1 , Figure 2As shown, this embodiment discloses a pump core, including a housing 11, a fixing seat 12, a first piston 13, a liquid outlet pipe 14, a connector 15, a first spring 16, and a second spring 17. The fixing seat 12 is fixedly installed at the upper opening of the housing 11, and part of the fixing seat 12 is located inside the housing 11. The fixing seat 12 and the housing 11 are fixed with an interference fit. A first sealing ring 121 is installed between the fixing seat 12 and the housing 11 to seal between them. The first piston 13 is located inside the housing 11. The lower end of the fixing seat 12 forms a limit for the movement of the first piston 13 above the housing 11. The part of the housing 11 below the first piston 13 forms a first chamber 101. The first chamber 101 serves as the main liquid outlet chamber, which can draw liquid through a suction pipe installed below the housing 11 and pump it outward from the liquid outlet pipe 14 through the movement of the first piston 13.

[0026] The upper end of the liquid outlet pipe 14 is inserted into the connector 15 and fixedly connected by a snap fastener. The liquid outlet pipe 14 passes through the first piston 13 and is slidably connected to the first piston 13. The outer wall of the first piston 13 is slidably connected to the inner wall of the outer casing 11. The connector 15 includes a second piston 151, which is located on the outer wall of the connector 15 and is integrally formed with the connector 15. The second piston 151 is located in the fixing seat 12 and is slidably connected to the inner wall of the fixing seat 12. A second chamber 102 is formed between the connector 15, the fixing seat 12, and the first piston 13. The second chamber 102 can serve as a chamber for liquid back suction from the liquid outlet pipe 14. As the second piston 151 moves upward, the second chamber 102 gradually expands and generates negative pressure, which back suctions the liquid portion in the liquid outlet pipe 14, thereby allowing the liquid remaining at the external nozzle to be recovered.

[0027] The outlet pipe 14 includes an outlet channel 141, a first inlet hole 142, and a second inlet hole 143. The first inlet hole 142 connects the first chamber 101 and the outlet channel 141, and the second inlet hole 143 connects the outlet channel 141 and the second chamber 102. The connector 15 is supported by a first spring 16 to the fixed base 12. The outlet pipe 14 includes a limiting block 144, which abuts against the lower end of the first piston 13. The second spring 17 is located between the connector 15 and the first... Between the pistons 13, the first spring 16 is used to reset the connector 15, and the second spring 17 can provide a buffer space for the opening of the first liquid inlet 142. When the connector 15 is in the highest position, the first piston 13 is in the highest position, the first piston 13 abuts against the lower end of the fixing member, the limiting block 144 abuts against the lower end of the first piston 13, and the reset of the first spring 16 causes the first piston 13 to be pulled upward, which increases the first chamber 101 and generates negative pressure to draw liquid from the bottle.

[0028] As the connector 15 is pressed down axially, the first inlet hole 142 connects to the first chamber 101, and the second chamber 102 gradually decreases in size. The first inlet hole 142 opens, and the liquid in the first chamber 101 enters the outlet channel 141 through the first inlet hole 142, starting the pumping process. The second chamber 102 gradually shrinks until it reaches its minimum size, and the liquid previously drawn back into the second chamber 102 is squeezed out through the second inlet hole 143 into the outlet channel 141. The second spring 17 is fully compressed, and the first chamber 101 gradually decreases until the connector 15 reaches its lowest position, at which point the pressure is released. When the force of the connector 15 is applied and the connector 15 is reset by the first spring 16, the first liquid inlet 142 will first retract into the first piston 13, and the liquid outlet channel 141 will be blocked from communicating with the first chamber 101. The first chamber 101 and the second chamber 102 gradually increase in size. The increase in size of the first chamber 101 can draw liquid from the bottle for the next pumping. The increase in size of the second chamber 102 can draw back some of the liquid located in the liquid outlet channel 141, which plays the role of drawing back liquid, reducing the liquid in the pump head, preventing dripping and leakage, and also preventing liquid from being drawn back into the bottle and causing contamination.

[0029] The first spring 16 is made of metal, which allows the connector 15 to reset faster and achieves the effect of sealing the first liquid inlet 142 first. The second spring 17 is made of plastic, which can avoid the rusting of metal springs and keep the liquid in the second chamber 102 clean.

[0030] Example 2:

[0031] like Figure 3 , Figure 4 , Figure 5 As shown, a pump head includes a pump core 1, a shoulder sleeve 2, a push head 3, a movable block 4, and a support block 5 as in Embodiment 1. The pump core 1 is fixedly installed on the shoulder sleeve 2. The fixed seat 12 is connected to the shoulder sleeve 2 by a snap-fit ​​connection. The push head 3 is installed on the upper end of the connector 15. The push head 3 includes a first channel 31 and a second channel 32. The first channel 31 connects the second channel 32 and the liquid outlet pipe 14. The first channel 31 is vertically arranged to connect the pump core 1. The second channel 32 communicates with the outer wall of the push head 3. The outer end of the second channel 32 is the liquid nozzle of the push head 3.

[0032] The pusher 3 includes a guide channel 33, and a movable block 4 is slidably installed in the guide channel 33. The inner wall of the guide channel 33 is provided with a second sealing ring 331, so that a sealed sliding structure is formed between the movable block 4 and the guide channel. The movable block 4 is slidably installed in the pusher 3. The movable block 4 can block or connect the first channel 31 and the second channel 32. The end of the movable block 4 facing the second channel 32 is provided with a conical surface. The inner diameter of the second channel 32 is smaller than the diameter of the movable block 4. The conical surface can abut against the opening edge of the inner end of the second channel 32 to achieve a seal. After the liquid is dispensed by pressing, the connection between the second channel 32 and the first channel 31 can be blocked, thus blocking the connection between the outside and the inside of the pump core 1. When the pump core 1 back-suctions liquid, the second channel 32 can be sealed by the movable block 4 to further prevent the liquid in the pusher 3 and the pump core 1 from deteriorating, drying, or becoming contaminated.

[0033] The shoulder sleeve 2 includes a guide seat 21, a support block 5 is installed on the guide seat 21, and a movable block 4 includes an inclined opening 41. The upper end of the support plate is provided with an inclined surface 51 corresponding to the inclined opening 41. The initial position of the support block 5 is located at the lower end of the inclined opening 41. The inclined surface 51 abuts against the inclined opening 41. When the push head 3 is pressed down, the movable block 4 moves away from the second channel 32. Since the height of the inclined surface 51 remains unchanged, during the process of pressing down the push head 3, the conical surface of the movable block 4 will move away from the second channel 32, thereby connecting the second channel 32 and the first channel 31, so that the push head 3 can dispense liquid when pressed down. When the movable block 4 moves away from the second channel 32, the other end of the push head 3 will extend out. After the push head 3 finishes dispensing liquid, the movable block 4 needs to be manually reset. The extension amount of the movable block 4 can be set to the length that the external cover cannot close the push head 3, so that the user must press the movable block 4 back before closing the cover, ensuring that the movable block 4 can be reset.

[0034] like Figure 3 , Figure 5As shown, since the movable block 4 needs the support block 5 to maintain a fixed support state when it moves, the guide seat 21 is provided with a mounting groove 211. A third spring 213 is installed in the mounting groove 211. The lower part of the support block 5 is located in the mounting groove 211. The support block 5 is slidably connected to the mounting groove 211. The support block 5 includes a retaining plate 52 and a groove 53. The retaining plate 52 is inclined and integrally formed with the support block 5. The retaining plate 52 can be elastically deformed and can abut against the upper end of the guide seat 21. The push head 3 includes a notch 34 and abutment plate 35. The notch 34 is located above the guide seat 21. When the push head 3 is pressed down, the notch 34 accommodates the guide seat 21. The abutment plate 35 is located in the notch 34. The guide seat 21 is provided with a slot 212. When the push head 3 is pressed down, the abutment plate 35 can be inserted into the slot. Inside the slot 212, when the push head 3 is at its highest position, the support block 5 is supported by the locking plate 52 against the guide seat 21. When the push head 3 is pressed down, the movable block 4 can slide. When the inclined surface 51 is at the uppermost end of the inclined opening 41, the inner side of the abutment plate 35 is provided with abutment 351 that slides against the side wall of the support block 5, which will press the locking plate 52 into the groove 53. The locking plate 52 leaves the upper end face of the guide seat 21, and the support block 5 is unlocked and can be pressed down. In terms of size, the width of the locking plate 52 is greater than the width of the slot 212, and the width of the abutment plate 35 is less than the width of the slot 212, ensuring that the push head 3 will not interfere with the guide seat 21 when pressed down. When the push head 3 is reset, the third spring 213 restores and resets the support block 5, so that the inclined surface 51 of the support block 5 always remains against the inclined opening 41.

[0035] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A pump core, characterized in that, The device includes a housing (11), a fixing seat (12), a first piston (13), a liquid outlet pipe (14), a connector (15), a first spring (16), and a second spring (17). The fixing seat (12) is fixedly installed at the upper opening of the housing (11). The first piston (13) is located inside the housing (11). The liquid outlet pipe (14) is slidably connected to the first piston (13). The portion of the housing (11) below the first piston (13) forms a first chamber (101). The liquid outlet pipe (14) is fixedly connected to the connector (15). The connector (15) includes a second piston (151), which is located inside the fixing seat (12). The connector (15) is fixedly connected to the fixing seat (16). 2) The first spring (16) supports the liquid outlet pipe (14), which includes a limiting block (144) that can abut against the lower end of the first piston (13). The second spring (17) is located between the connector (15) and the first piston (13). The connector (15), the fixed seat (12), and the first piston (13) form a second chamber (102). The liquid outlet pipe (14) includes a liquid outlet channel (141), a first liquid inlet (142), and a second liquid inlet (143). The first liquid inlet (142) can connect the first chamber (101) and the liquid outlet channel (141), and the second liquid inlet (143) connects the liquid outlet channel (141) and the second chamber (102).

2. The pump core according to claim 1, characterized in that, During the process of the connector (15) being pressed down along the axial direction, the first liquid inlet (142) connects to the first chamber (101), the second chamber (102) gradually decreases, and after the second chamber (102) reaches its minimum, the first chamber (101) gradually decreases. When the connector (15) is reset by the first spring (16), the first liquid inlet (142) is blocked from communicating with the first chamber (101), and the first chamber (101) and the second chamber (102) gradually increase.

3. The pump core according to claim 1, characterized in that, The first spring (16) is made of metal, and the second spring (17) is made of plastic.

4. The pump core according to claim 1, characterized in that, The fixing seat (12) is located inside the outer shell (11). The fixing seat (12) is fixed to the outer shell (11) by an interference fit. A first sealing ring (121) is installed between the fixing seat (12) and the outer shell (11).

5. A pump core according to claim 1, characterized in that, When the connector (15) is in the highest position, the first piston (13) is in the highest position, the first piston (13) abuts against the lower end of the fixing member, and the limiting block (144) abuts against the lower end of the first piston (13).

6. A pump core according to claim 1, characterized in that, The second piston (151) is located on the outer wall of the connector (15), and the second piston (151) is integrally formed with the connector (15).

7. A pump head, characterized in that, The device includes a pump core (1), a shoulder sleeve (2), a push head (3), and a movable block (4) as described in any one of claims 1-6. The pump core is fixedly installed on the shoulder sleeve (2), and the push head (3) is installed on the upper end of the connector (15). The push head (3) includes a first channel (31) and a second channel (32). The first channel (31) connects the second channel (32) and the liquid outlet pipe (14). The second channel (32) communicates with the outer side wall of the push head (3). The movable block (4) is slidably installed on the push head (3). The movable block (4) can block or connect the first channel (31) and the second channel (32).

8. A pump head according to claim 7, characterized in that, The shoulder sleeve (2) includes a support block (5), a guide seat (21), the support block (5) is mounted on the guide seat (21), the push head (3) includes a guide channel (33), the movable block (4) is slidably mounted on the guide channel (33), the movable block (4) includes a bevel (41), the upper end of the support plate is provided with a bevel (51) corresponding to the bevel (41), and the push head (3) is pressed down so that the movable block (4) moves away from the second channel (32).

9. A pump head according to claim 8, characterized in that, The guide seat (21) is provided with a mounting groove (211), and a third spring (213) is installed in the mounting groove (211). The lower part of the support block (5) is located in the mounting groove (211). The support block (5) is slidably connected to the mounting groove (211). The support block (5) includes a retaining plate (52). The retaining plate (52) is inclined and can abut against the upper end of the guide seat (21). The push head (3) includes a notch (34) and a stop plate (35). The notch (34) is located above the guide seat (21), and the stop plate (35) is located in the notch (34). The guide seat (21) is provided with a slot (212), and the stop plate (35) can be inserted into the slot (212).

10. A pump head according to claim 9, characterized in that, The width of the card plate (52) is greater than the width of the slot (212), the width of the abutment plate (35) is less than the width of the slot (212), the support block (5) includes a groove (53), the card plate (52) is elastically deformable, and the card plate (52) can be pressed into the groove (53) by the abutment plate (35).

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