Atomizing pump core

Abstract

An atomizing pump core comprises a pump body, a piston, a lower valve, an upper spring, a lower spring and a piston rod, the piston rod is sleeved with the upper spring and the piston, the lower valve is arranged at the lower end of the piston rod, the outer wall of the lower end of the piston abuts against the inner wall of the pump body in a sealed mode, a liquid storage cavity is formed between the lower end of the piston and the inner wall of the pump body, and the upper spring is supported between the upper end of the piston and the piston rod. The lower spring is supported between the lower end of the lower valve and the pump body, the upper end of the piston rod penetrates through the pump body to be connected with the head cap, a liquid outlet channel is formed in the piston rod, and a liquid inlet hole is formed in the side wall of the lower portion of the piston rod to be communicated with the liquid outlet channel. And a plurality of guide ribs convenient for mounting and centering the lower spring and preventing the lower spring from deflecting and bending are longitudinally and concavely arranged on the inner wall of the pump body at intervals. The spray pump is reasonable in structure, the guide ribs are arranged in the pump body, so that the spring is centered in installation and not prone to deflection and deformation in use, the working stability of the spring is greatly improved, the service life of the spring is greatly prolonged, meanwhile, the sealing performance of the piston is good, spray is stable, and feed liquid can be distributed quantitatively.

Description

TECHNICAL FIELD

[0001] The utility model belongs to daily use cosmetic technology field, concretely relates to a spray pump core for cosmetic bottle. BACKGROUND

[0002] Cosmetic is the chemical industry product or fine chemical product for the purpose of cleaning, maintaining, beautifying, modifying and changing appearance, or correcting body odor, keeping good state, which is spread on any part of human body surface, such as skin, hair, nail, lips and teeth, etc. by smearing, spraying or other similar methods. However, the makeup after makeup often leads to makeup phenomenon due to sweating, oil and the like. Positioning spray is a product produced for the purpose of making makeup last, which has the functions of fixing makeup, moisturizing, controlling oil and improving makeup effect. When using, the positioning spray needs to be quickly and evenly covered on the skin to form a thin film on the skin surface, so as to fix makeup and improve makeup effect.

[0003] The key to the effect of positioning spray depends on the pump core. The existing pump core has mostly only one spring, and the spray effect is not ideal. At present, pump cores with double springs have also appeared.

[0004] According to the investigation, the existing Chinese patent No. CN202023105158.5 "Double-spring spray pump" discloses a spray pump, which comprises a pump body shell, a piston rod, a lower valve, a piston, an upper spring, a lower spring and a steel ball. The pump body shell is provided with a pump chamber, the lower end of the pump chamber is provided with a liquid inlet, and the steel ball is arranged above the liquid inlet. The piston rod is arranged in the pump chamber from top to bottom, and the piston rod has a hollow channel penetrating through the upper and lower ends. The lower end of the hollow channel is provided with a liquid inlet hole arranged on the side surface of the piston rod. The lower end of the piston rod is provided with the lower valve, and the piston and the upper spring are arranged on the outer periphery of the piston rod. The upper spring presses the lower end of the piston against the upper end of the lower valve by the spring force. The lower end of the lower spring is arranged at the lower end of the pump chamber, and the upper end of the lower spring is arranged at the lower end of the lower valve. The steel ball is arranged below the lower spring.

[0005] In addition, the Chinese patent No. 202120394008.6 "Spring-embedded pump core" discloses a pump core, which comprises a pressing rod, an upper ring, a pump shell, a sealing ring, a first spring, a sliding sleeve plug rod, a second spring and a ball. The upper ring is embedded on the top of the pump shell, and the pressing rod penetrates through the middle of the upper ring. The middle of the pressing rod is provided with a limiting convex. The sealing ring, the first spring, the sliding sleeve and the plug rod are sequentially sleeved on the pressing rod from top to bottom. The two ends of the sealing ring are in contact with the inner wall of the upper ring and the upper surface of the limiting convex, respectively. The two ends of the first spring are in contact with the lower surface of the limiting convex and the upper part of the sliding sleeve, respectively. The second spring is sleeved on the plug rod. The two ends of the second spring are in contact with the plug rod and the inner cavity of the pump shell, respectively. The inner cavity of the pump shell below the second spring contains the ball.

[0006] Both of the above spray pumps are designed with double springs, which makes the pumped liquid more stable. However, the springs are prone to bending and deformation when compressed, which not only affects the stability of the springs but also their service life. In addition, the sealing performance of the piston in the existing structure is not ideal, and further structural improvements are needed. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a spray pump core with a reasonable structure, easy spring installation, and stable spray, in light of the above-mentioned technical status.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a spray pump core, including a pump body, a piston, a lower valve, an upper spring, a lower spring, and a piston rod. The upper spring, piston, lower valve, and lower spring are arranged sequentially from top to bottom in the pump body. The upper spring and piston are sleeved on the outside of the piston rod. The lower valve is located at the lower end of the piston rod. The lower end of the piston's outer wall is sealed against the inner wall of the pump body. A liquid storage cavity is formed between the lower end of the piston and the inner wall of the pump body. The upper spring is supported between the upper end of the piston and the piston rod. The lower spring is supported between the lower end of the lower valve and the pump body. The upper end of the piston rod passes through the pump body and is connected to the head cap. A liquid outlet channel is provided inside the piston rod. A liquid inlet hole is opened on the lower side wall of the piston rod and is connected to the liquid outlet channel. The characteristic feature is that the inner wall of the pump body is longitudinally recessed with several guide ribs to facilitate the installation and centering of the lower spring and prevent the lower spring from deflecting or bending.

[0009] As an improvement, the pump body is a cylindrical structure with an open top. The pump body is divided into three sections with a downwardly narrowing diameter. The lower section is an insertion section that connects to the suction tube, the middle section is cylindrical, and the middle section and the lower section are connected by a slope. Guide ribs are evenly spaced on the inner wall of the middle section of the pump body.

[0010] Furthermore, the width of the guide rib gradually increases downwards.

[0011] Furthermore, the piston is located in the upper section of the pump body, and the lower outer wall of the piston has a valve structure that is tightly sealed to the upper inner wall of the pump body. Sealing ribs are located at the upper and lower edges of the valve structure. A step is formed on the inner wall between the middle and upper sections of the pump body to limit the piston.

[0012] Furthermore, a pump cover is fitted at the upper opening of the pump body, the inner wall of the upper opening of the pump body is formed with internal threads, the pump cover is provided with corresponding external threads, the pump cover is fixed to the pump body by threaded connection, and a central hole is opened on the pump cover for the upper end of the piston rod to pass through.

[0013] Furthermore, a limiting retaining ring is circumferentially protruding in the middle of the piston rod, and an O-ring is provided between the limiting retaining ring and the inner wall of the lower end face of the pump cover. The upper spring is sleeved on the outside of the piston rod and supported between the upper end of the piston and the lower end face of the limiting retaining ring, so that the piston rod has a tendency to move upward and reset.

[0014] Furthermore, the lower end of the piston rod, below the inlet hole, is formed into a reduced-diameter connecting section. The upper end of the connecting section transitions to the outer wall of the piston rod with an inclined surface. The lower valve is sleeved outside the connecting section. The upper end of the lower valve has an upward and outward extending conical opening that abuts against the inclined surface. The lower end of the piston has an inclined surface corresponding to the conical opening of the lower valve.

[0015] Finally, a steel ball is provided in the lower part of the pump body. The steel ball and the inner wall of the pump body are fitted together with a gap to form a one-way valve. The lower spring is located above the steel ball and is supported between the upper outer wall of the lower valve and the inner wall of the pump body.

[0016] Compared with existing technologies, the advantages of this invention are as follows: The inner wall of the pump body is longitudinally recessed with several guide ribs, which act as a spring straightener during assembly, facilitating spring installation and centering, and preventing spring skewing or bending during use, thus making the spring work more stably. Sealing ribs are provided along the upper and lower edges of the valve structure at the lower end of the piston, which abuts against the inner wall of the pump body, further enhancing the sealing effect. This invention has a reasonable structural design. By setting guide ribs in the pump body, the spring is installed and centered, and is less prone to skewing or deformation during use, greatly increasing the spring's working stability and service life. At the same time, the piston's good sealing performance makes the spray more stable and the spray effect better, allowing for precise distribution of the liquid and even spraying it onto the skin for a good makeup setting effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 A longitudinal sectional view;

[0019] Figure 3 for Figure 2 Exploded view;

[0020] Figure 4 This is an enlarged cross-sectional view of the valve structure. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 4As shown, a spray pump core includes a pump body 1, a piston 4, a lower valve 5, an upper spring 6, a lower spring 7, and a piston rod 3. The upper spring 6, piston 4, lower valve 5, and lower spring 7 are arranged sequentially from top to bottom inside the pump body 1. The upper spring 6 and piston 4 are sleeved on the outside of the piston rod 3. The lower valve 5 is located at the lower end of the piston rod 3. The outer wall of the lower end of the piston 4 seals against the inner wall of the pump body 1. A liquid storage chamber B is formed between the lower end of the piston 4 and the inner wall of the pump body 1. The upper spring 6 is supported between the upper end of the piston 4 and the piston rod 3. The lower spring 7 is supported between the lower end of the lower valve 5 and the pump body 1. The upper end of the piston rod 3 passes through the pump body 1 and is connected to the head cap. The piston rod 3 has a liquid outlet channel A. The lower side wall of the piston rod 3 has a liquid inlet hole 31 that communicates with the liquid outlet channel A. The inner wall of the pump body 1 is longitudinally recessed with several guide ribs 11 to facilitate the installation and centering of the lower spring 7 and to prevent the lower spring 7 from deflecting or bending.

[0023] The specific structure is as follows: Pump body 1 is a cylindrical structure with an open top. Pump body 1 is divided into three sections with a downwardly narrowing diameter. The lower section 1c is the insertion section for connecting with the suction pipe. The middle section 1b is cylindrical. The middle section 1b and the lower section 2c are connected by a slope. Guide ribs 11 are evenly spaced on the inner wall of the middle section 1b of pump body 1, and the width of the guide ribs 11 gradually increases downwards. The purpose of setting the guide ribs 11 is to: straighten the lower spring 7 during assembly, making it easier for the lower spring 7 to be installed and aligned, and to prevent the lower spring 7 from tilting or bending during use, making the lower spring 7 work more stably, thereby ensuring stable spraying. Piston 4 is located in the upper section 1a of pump body 1. The lower outer wall of piston 4 has a valve structure 41 that is tightly sealed to the inner wall of the upper section 1a of pump body 1. Sealing ribs 4a and 4b are located at the upper and lower edges of the valve structure 41, respectively. A step 12 is formed on the inner wall between the middle section 1b and the upper section 1a of pump body 1 to limit the movement of piston 4.

[0024] The pump body 1 has an expanded upper section forming an end with an upper opening. A pump cover 2 fits into the upper opening. The inner wall of the upper opening of the pump body 1 is formed with internal threads, and the pump cover 2 has corresponding external threads. The pump cover 2 is fixed to the pump body 1 by a threaded connection. A central hole is provided on the pump cover 2 for the upper end of the piston rod 3 to pass through. A retaining ring 32 is circumferentially protruding from the middle of the piston rod 3. An O-ring seal 9 is provided between the retaining ring 32 and the inner wall of the lower end face of the pump cover 2. An upper spring 6 is sleeved on the piston rod 3 and supported between the upper end of the piston 4 and the lower end face of the retaining ring 32, giving the piston rod 3 a tendency to move upward and return to its original position. The lower end of the piston rod 3 and the area below the inlet hole 31 are formed into a reduced-diameter connecting section. The upper end of the connecting section transitions to the outer wall of the piston rod 3 with an inclined surface. The lower valve 5 is sleeved outside the connecting section. The upper end of the lower valve 5 has an upward and outward tapered opening that abuts against the inclined surface. The lower end of the piston 4 has an inclined surface corresponding to the tapered opening of the lower valve 5.

[0025] A steel ball 8 is provided in the lower part of the pump body 1. The steel ball 8 and the inner wall of the pump body 1 are fitted together to form a one-way valve. The lower spring 8 is located above the steel ball 8 and is supported between the upper outer wall of the lower valve 5 and the inner wall of the pump body 1.

[0026] The working principle is as follows: When the pump head is pressed, the piston rod 3 pushes the piston 4 downward, and the residual liquid in the storage chamber B is discharged through the outlet channel A. At the same time, the storage chamber B is emptied and the pressure increases significantly. When the pump head is released, the piston rod moves upward and resets under the action of the upper spring 6 and the lower spring 7, forming a negative pressure. Under the action of negative pressure, the liquid in the container passes through the steel ball 8 and enters the storage chamber B. Finally, the steel ball 8 falls back, closing the channel and ensuring that the liquid in the pump body 1 does not leak. At the same time, the pump head springs back to the initial position, and the volume of the storage chamber B remains stable, preparing for the next press.

[0027] When the user presses the pump head again, the liquid in the reservoir B is squeezed by the piston 4 and flows through the piston rod 3. The whole process is repeated as the user presses and releases the pump head, completing multiple dispensing operations, so that the liquid is evenly sprayed from the nozzle and evenly sprayed onto the skin, achieving a better makeup setting effect.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A spray pump core, comprising a pump body, a piston, a lower valve, an upper spring, a lower spring, and a piston rod, wherein the upper spring, piston, lower valve, and lower spring are sequentially arranged from top to bottom within the pump body; the upper spring and piston are sleeved outside the piston rod; the lower valve is located at the lower end of the piston rod; the outer wall of the lower end of the piston seals against the inner wall of the pump body; a liquid storage chamber is formed between the lower end of the piston and the inner wall of the pump body; the upper spring is supported between the upper end of the piston and the piston rod; the lower spring is supported between the lower end of the lower valve and the pump body; the upper end of the piston rod passes through the pump body and connects to a cap; a liquid outlet channel is provided inside the piston rod; and a liquid inlet hole is opened on the lower side wall of the piston rod and communicates with the liquid outlet channel, characterized in that: The inner wall of the pump body is longitudinally recessed with several guide ribs to facilitate the installation and centering of the lower spring and prevent the lower spring from deviating or bending.

2. The spray pump core according to claim 1, characterized in that: The pump body is a cylindrical structure with an open top. The pump body is divided into three sections with a downwardly narrowing diameter. The lower section is the insertion section that connects to the suction tube. The middle section is cylindrical. The middle section and the lower section are connected by a slope. Guide ribs are evenly spaced on the inner wall of the middle section of the pump body.

3. The spray pump core according to claim 2, characterized in that: The width of the guide rib gradually increases downwards.

4. The spray pump core according to claim 2, characterized in that: The piston is located in the upper section of the pump body. The lower outer wall of the piston has a valve structure that is tightly sealed to the upper inner wall of the pump body. Sealing ribs are located at the upper and lower edges of the valve structure. A step is formed on the inner wall between the middle and upper sections of the pump body to limit the piston.

5. The spray pump core according to any one of claims 1 to 4, characterized in that: The pump body has a pump cover fitted at the upper opening. The inner wall of the upper opening of the pump body is formed with internal threads, and the pump cover has a corresponding external thread. The pump cover is fixed to the pump body by threaded connection, and a central hole is opened on the pump cover for the upper end of the piston rod to pass through.

6. The spray pump core according to claim 5, characterized in that: A limiting ring is circumferentially protruding in the middle of the piston rod. An O-ring is provided between the limiting ring and the inner wall of the lower end face of the pump cover. The upper spring is sleeved on the outside of the piston rod and supported between the upper end of the piston and the lower end face of the limiting ring, so that the piston rod has a tendency to move upward and reset.

7. The spray pump core according to claim 6, characterized in that: The lower end of the piston rod, below the inlet hole, is formed into a reduced-diameter connecting section. The upper end of the connecting section transitions to the outer wall of the piston rod with an inclined surface. The lower valve is sleeved outside the connecting section. The upper end of the lower valve has an upward and outward extending conical opening that abuts against the inclined surface. The lower end of the piston has an inclined surface corresponding to the conical opening of the lower valve.

8. The spray pump core according to any one of claims 1 to 4, characterized in that: A steel ball is provided in the lower part of the pump body. The steel ball and the inner wall of the pump body are fitted together with a gap to form a one-way valve. The lower spring is located above the steel ball and is supported between the upper outer wall of the lower valve and the inner wall of the pump body.

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