Outer spring pump core

Abstract

An outer spring pump core relates to the technical field of pump cores and is used for solving the problems of material body pollution and accidental leakage caused by built-in spring. The pump core sleeves the spring outside the upper pressing rod to isolate the spring from the contact channel of the material body. The pump core comprises the upper pressing rod, the outer spring, the connector, the piston rod, the connecting rod, the body and the valve piece. The outer spring is installed between the upper pressing rod and the connector, and the connector is fixed to the body. The side wall of the connecting rod is provided with two channels, and the axis of the channels and the axis of the connecting rod form an included angle of 15°. The limiting assembly is composed of a limiting vertical rod and a limiting hole. The rotation of the limiting vertical rod can lock the position of the upper pressing rod to prevent accidental pressing. The pump core is suitable for cosmetic and food bottles, reduces the pollution risk, avoids leakage and prolongs the service life.

Description

Technical Field

[0001] This utility model relates to the field of pump core technology, and in particular to an externally manufactured spring pump core. Background Technology

[0002] A pump is a machine used to increase the pressure of a liquid or gas, enabling it to flow. It is a device used to move liquids, gases, or special fluid media; in other words, it is a machine that performs work on fluids. Pumps are mainly used to transport liquids including water, oil, acid and alkali solutions, emulsions, suspensions, and liquid metals. They can also transport mixtures of liquids and gases, as well as liquids containing suspended solids.

[0003] Currently, bottles containing cosmetics or skincare products often use springs, which have the drawback of placing the spring inside the bottle itself. If the product enters the bottle, it may cause contamination, and the contents may become contaminated by the metallic spring. Furthermore, during normal use, the device is prone to accidental activation, leading to leaks and unnecessary waste. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies that use springs in bottles containing cosmetics or skincare products. These springs are placed inside the main body, which can cause contamination if the product enters the main body, leading to contamination of the contents by the metallic spring. Furthermore, during normal use, the device is prone to accidental activation, resulting in leakage and unnecessary waste. Therefore, this invention proposes an externally mounted spring pump core.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An externally mounted spring pump core includes an upper pressure rod, an outer spring, a connector, a piston rod, a connecting rod, a body, and a valve plate. The outer spring is fitted onto the outside of the upper pressure rod. The connector is installed on the lower part of the upper pressure rod and presses down on the outer spring. The piston rod is fitted onto the connecting rod, and the connecting rod is fixedly connected to the upper pressure rod. The valve plate is located at the bottom of the body. A push piston is integrally formed at the bottom of the piston rod. The push piston and the connecting rod are located inside the body. The connector is fixedly connected to the body.

[0007] In one possible design, a limiting component is also included, which includes an outer annular groove formed on the outer wall of the upper pressure rod, a connecting outer ring rotatably connected to the outer annular groove, a limiting horizontal bar fixed to the outer wall of the connecting outer ring, a limiting vertical bar fixed to the limiting horizontal bar, and a limiting hole formed on the connector, wherein the limiting hole is used in conjunction with the limiting vertical bar.

[0008] In one possible design, the upper pressure rod has an inner annular groove, and a rotating inner ring is fixedly connected to the inner wall of the connecting outer ring, with the rotating inner ring rotatably connected to the inside of the inner annular groove.

[0009] In one possible design, the sidewall of the connecting rod has two channels.

[0010] In one possible design, the axis of the channel forms a 15° angle with the axis of the connecting rod, and the material is discharged symmetrically along the two side channels to reduce radial wear.

[0011] In one possible design, the connector has an integrally formed annular plate on its outer edge, and the limiting hole is formed on the annular plate.

[0012] In this application, the present invention utilizes the principle of positive and negative air pressure. The pump core is placed on a screw ring or snap ring and a bottle containing material is placed on it. At this time, the upper pressure rod is pressed down, the outer spring is compressed, the valve plate remains stationary and seals the bottom of the body, the valve of the piston and connecting rod opens, and the material inside the body flows through the channel of the connecting rod and the upper pressure rod. At this time, the upper pressure rod is released, causing the outer spring to rebound, the valve of the piston and connecting rod to close, creating an airtight interior and creating a negative pressure suction force that lifts the valve plate upward, and the material is sucked into the body.

[0013] Furthermore, in actual use, to prevent accidental contact and leakage of contents, the inner rotating ring and the outer connecting ring can be rotated using the limiting vertical rod and the limiting horizontal rod. The inner rotating ring and the outer connecting ring are used in conjunction with the inner annular groove and the outer annular groove, respectively, to prevent the device from falling off. When the limiting vertical rod is no longer above the limiting hole, it is blocked and cannot be pressed down. It can only be used normally when the limiting vertical rod moves above the limiting hole, which can effectively prevent leakage of contents.

[0014] Beneficial effects:

[0015] Traditional pump cores typically embed the spring within the main body, posing a risk of contamination due to direct contact between the metal spring and the material. This application addresses this by placing an external spring around the upper pressure rod, completely isolating the spring from the material and eliminating the risk of metal ion release or coating peeling from the spring surface contaminating the material. This design is particularly suitable for applications with stringent purity requirements, such as cosmetics and food.

[0016] The engagement between the limiting vertical rod and the limiting hole of the connector annular plate forms a mechanical locking structure. When the limiting vertical rod deviates from the limiting hole, the upper pressure rod is completely restricted from axial displacement, and even accidental pressing will not start the pump core, effectively avoiding the risk of leakage caused by accidental contact by children or collisions during transportation.

[0017] The rotating engagement structure connecting the outer ring and the outer annular groove, and rotating the inner ring and the inner annular groove, ensures that the limiting component remains stable during rotational adjustment and avoids limiting failure due to vibration.

[0018] The connector adopts a ring plate structure and is snapped together with the body, with an axial pull-out force of over 30N, far exceeding the industry standard requirement of 15N, ensuring that the pump core maintains structural integrity during repeated pressing.

[0019] The piston and connecting rod adopt a dual-channel design. When the valve is opened, the material can be discharged symmetrically along the two channels, which effectively reduces the radial force generated by unidirectional flow and the uneven wear on the piston sealing surface, extending the sealing life to more than 5,000 cycles. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural schematic diagram of an externally manufactured spring pump core proposed in this utility model;

[0021] Figure 2 This is a three-dimensional cross-sectional view of an externally manufactured spring pump core proposed in this utility model.

[0022] Figure 3 This is a three-dimensional structural schematic diagram of a braking mechanism in an externally mounted spring pump core proposed in this utility model;

[0023] Figure 4 This is an exploded view of the braking mechanism and connector in an externally manufactured spring pump core proposed in this utility model.

[0024] In the diagram: 1. Upper pressure rod; 2. Outer spring; 3. Connector; 31. Annular plate; 4. Piston rod; 41. Push piston; 5. Connecting rod; 51. Channel; 6. Body; 7. Valve plate; 8. Limiting horizontal bar; 9. Limiting vertical bar; 10. Outer annular groove; 11. Inner annular groove; 12. Rotating inner ring; 13. Connecting outer ring; 14. Limiting hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] In one embodiment; reference Figure 1-4A pump core, comprising: The specific implementation of the external spring pump core is as follows: The upper pressure rod 1 is a hollow cylindrical structure, with an external spring 2 sleeved on its lower outer edge. The lower end of the external spring 2 abuts against the upper surface of the connector 3. The connector 3 is an annular structure, with an annular plate integrally formed on its outer edge. Two symmetrically distributed limiting holes 14 are opened on the surface of the annular plate. The connector 3 is fitted onto the lower outer edge of the upper pressure rod 1, achieving axial positioning through an interference fit. The piston is an annular silicone component, its inner hole forming a sliding seal with the connecting rod 5. The connecting rod 5 is a tubular structure with open ends, and two longitudinal channels 51 are opened on its side wall. The axis of the channels 51 forms a 15° angle with the axis of the connecting rod 5. After the connecting rod 5 passes through the inner hole of the piston from bottom to top, it is fixedly connected to the bottom of the upper pressure rod 1 by laser welding. The welding point is located at the annular step set on the inner wall of the upper pressure rod 1. The body 6 is a transparent PC material cylinder, with a valve plate 7 embedded in its bottom inner cavity. The valve plate 7 is a circular thin sheet of PEEK material, and its outer edge is sealed to the inner wall of the body 6 through an O-ring. After the piston assembly is assembled, it is inserted into the body 6. The annular protrusion on the outer edge of the connector 3 and the L-shaped groove on the neck of the body 6 form a rotating snap-fit ​​fixation.

[0027] The limiting assembly consists of a connecting outer ring 13, a rotating inner ring 12, a limiting horizontal bar 8, and a limiting vertical bar 9. An outer annular groove 10 is formed on the outer wall of the upper pressure bar 1, and an inner annular groove 11 is coaxially formed at the bottom of the groove. The rotating inner ring 12 is fitted into the inner annular groove 11, and its outer edge is fixedly connected to the inner wall of the connecting outer ring 13 by screws. Two mutually perpendicular limiting horizontal bars 8 are welded to the outer wall of the connecting outer ring 13, and the ends of the horizontal bars are vertically connected to the limiting vertical bars 9. When the connector 3 and the body 6 are engaged, the limiting vertical bar 9 is aligned with the limiting hole 14 on the surface of the annular plate. At this time, rotating the connecting outer ring 13 causes the rotating inner ring 12 to rotate within the inner annular groove 11, allowing the limiting vertical bar 9 to deflect within a 90° range.

[0028] In actual use, the neck of the pump core body 6 is screwed into the matching bottle's screw ring for fixation. In the initial state, the limiting vertical rod 9 is located in the axial direction of the limiting hole 14, and the upper pressure rod 1 can move freely axially. Upon first press, the outer spring 2 is compressed and contracts, and the upper pressure rod 1 drives the connecting rod 5 to move downwards synchronously. The piston and the sealing cone surface at the end of the connecting rod 5 disengage, and the material inside the body 6 is discharged upwards along the channel 51 of the connecting rod 5. When the upper pressure rod 1 is released, the outer spring 2 returns to its original position, pushing the piston 41 back to its original position. The piston and the connecting rod 5 re-form a seal, generating negative pressure inside the body 6. Under the action of the pressure difference, the valve plate 7 moves upwards and disengages from the bottom sealing surface of the body 6, and the material inside the bottle is replenished into the pump chamber through the gap between the valve plate 7 and the body 6.

[0029] When the pump core needs to be locked, rotate the outer ring of the connector 1345°, causing the limiting vertical rod 9 to deviate from the axis of the limiting hole 14. At this time, the lower edge of the limiting vertical rod 9 contacts the upper surface of the annular plate of the connector 3 to form a mechanical limit, and the axial displacement of the upper pressure rod 1 is completely restricted. In this state, even if an axial force of 15N is applied, the pump core remains sealed, effectively preventing accidental leakage during transportation or storage. The limiting component is made of POM material, with a friction coefficient of 0.2 with the upper pressure rod 1, and has been tested to withstand 5000 reciprocating rotations while maintaining normal function.

[0030] This embodiment completely isolates the metal components from the material using an external spring structure. Verified by a third-party testing agency, the heavy metal leaching level is below 0.1 ppm, meeting FDA cosmetic safety standards. The mechanical locking structure of the limiting component ensures that the pump core leakage rate in the locked state is less than 0.005 mL / h, a 90% reduction compared to traditional structures. The positive and negative pressure differential working principle, combined with the dual-channel 51 design, achieves a single press dispensing accuracy of ±0.02 mL, suitable for precise delivery of high-viscosity materials (5000-50000 mPa·s).

[0031] This application can be used in the field of pump cores, or in other fields applicable to this application.

[0032] In another embodiment; reference Figure 1-4 An externally mounted spring pump core is used in the pump core field. When the pump core needs to be locked, rotating the connecting outer ring 1345° causes the limiting vertical rod 9 to deviate from the axis of the limiting hole 14. At this time, the lower edge of the limiting vertical rod 9 contacts the upper surface of the annular plate of the connector 3 to form a mechanical limit, and the axial displacement of the upper pressure rod 1 is completely restricted. In this state, even if an axial force of 15N is applied, the pump core remains sealed, effectively preventing accidental leakage during transportation or storage. The limiting component is made of POM material, with a friction coefficient of 0.2 with the upper pressure rod 1, and has been tested to withstand 5000 reciprocating rotations while maintaining normal function.

[0033] This embodiment completely isolates the metal components from the material using an external spring structure. Verified by a third-party testing agency, the heavy metal leaching level is below 0.1 ppm, meeting FDA cosmetic safety standards. The mechanical locking structure of the limiting component ensures that the pump core leakage rate in the locked state is less than 0.005 mL / h, a 90% reduction compared to traditional structures. The positive and negative pressure differential working principle, combined with the dual-channel 51 design, achieves a single press dispensing accuracy of ±0.02 mL, suitable for precise delivery of high-viscosity materials (5000-50000 mPa·s).

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An externally manufactured spring pump core, characterized in that, The device includes an upper pressure rod (1), an outer spring (2), a connector (3), a piston rod (4), a connecting rod (5), a body (6), and a valve plate (7). The outer spring (2) is fitted onto the outside of the upper pressure rod (1). The connector (3) is installed on the lower part of the upper pressure rod (1) and presses down on the outer spring (2). The piston rod (4) is fitted onto the connecting rod (5). The connecting rod (5) is fixedly connected to the upper pressure rod (1). The valve plate (7) is located at the bottom of the body (6). The bottom of the piston rod (4) is integrally formed with a push piston (41). The push piston (41) and the connecting rod (5) are located inside the body (6). The connector (3) is fixedly connected to the body (6).

2. The externally mounted spring pump core according to claim 1, characterized in that, It also includes a limiting component, which includes an outer annular groove (10) opened on the outer wall of the upper pressure rod (1), a connecting outer ring (13) rotatably connected to the outer annular groove (10), a limiting horizontal bar (8) fixed to the outer wall of the connecting outer ring (13), a limiting vertical bar (9) fixed to the limiting horizontal bar (8), and a limiting hole (14) opened on the connector (3), wherein the limiting hole (14) is used in conjunction with the limiting vertical bar (9).

3. The externally mounted spring pump core according to claim 2, characterized in that, The upper pressure rod (1) has an inner annular groove (11) inside, and the inner wall of the connecting outer ring (13) is fixedly connected to a rotating inner ring (12), which is rotatably connected to the inner annular groove (11).

4. The externally mounted spring pump core according to claim 1, characterized in that, The connecting rod (5) has two channels (51) on its side wall.

5. The externally mounted spring pump core according to claim 4, characterized in that, The axis of the channel (51) forms a 15° angle with the axis of the connecting rod (5), and the material is discharged symmetrically along the two side channels (51) to reduce radial wear.

6. The externally mounted spring pump core according to claim 2, characterized in that, The connector (3) has an annular plate (31) integrally formed on its outer edge, and the limiting hole (14) is formed on the annular plate (31).

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