A spray pump

Abstract

A spray pump includes a cap, a large cover, and a pump core. The lower end of the pump core is connected to a suction tube. A piston and piston rod are located inside the pump core. The upper end of the piston rod passes through the pump core and the large cover and connects to the cap. A water outlet is located on one side of the cap, and a nozzle is embedded within the water outlet. The pump core employs a double-spring structure. The nozzle has a spray orifice at its front end with a diameter of 0.17–0.22 mm. A conical vortex generating chamber is located inside the spray orifice. The nozzle inlet adopts a dual-channel design, with the angle of the inlet channel tangent to the inner wall of the vortex generating chamber. This invention features a reasonable and compact structure, excellent spray effect, and stable, ultra-fine spraying, allowing the liquid to be sprayed evenly and finely onto the skin for a better makeup setting effect. It also provides good sealing and is more hygienic to use.

Description

Technical Field

[0001] This utility model belongs to the technical field of daily cosmetic products, specifically relating to a spray pump. Background Technology

[0002] Cosmetics refer to chemical industrial products or fine chemical products that are applied to any part of the human body surface, such as skin, hair, nails, lips, and teeth, by means of smearing, spraying, or other similar methods, to achieve the purpose of cleansing, maintenance, beautification, modification and alteration of appearance, or correction of body odor and maintenance of a good condition. However, makeup often smudges due to sweat and oil. Setting sprays are products developed to make makeup last longer, offering functions such as setting, moisturizing, oil control, and enhancing makeup effects. When using, the setting spray needs to be quickly, evenly, and finely applied to the skin, forming a thin film on the skin surface to set and enhance the makeup. Setting sprays are usually used in small amounts, hence the need for an extremely fine mist.

[0003] The key to achieving ultra-fine spray in spray pumps lies in the design of the pump core and nozzle. Currently, improvements are usually made to the nozzle and flow channel, such as further reducing the size of the sprayer's nozzle, but the effect is not ideal. In addition, most existing pump cores only have one spring, resulting in an unsatisfactory spray effect.

[0004] An investigation revealed that Chinese patent CN202023105158.5, entitled "A Double-Spring Spray Pump," describes a spray pump comprising a pump core housing, a piston rod, a lower valve, a piston, an upper spring, a lower spring, and a steel ball. The pump core housing contains a pump chamber with a liquid inlet at its lower end, and the steel ball is positioned above the inlet. The piston rod is located within the pump chamber from top to bottom and has a hollow channel running vertically through it. A liquid inlet at the lower end of the hollow channel is located on the side of the piston rod. The lower valve is located at the lower end of the piston rod. The piston and upper spring are fitted around the piston rod, with the upper spring using its spring force to press the lower end of the piston against the upper end of the lower valve. The lower end of the lower spring abuts against the lower end of the pump chamber, and the upper end of the lower spring abuts against the lower end of the lower valve. The steel ball is located below the lower spring. This spray pump features a double-spring design, which makes the pumped liquid more stable, but it does not improve the ultra-fine spray.

[0005] There is also a Chinese patent with patent number CN202420642427.0 entitled "A Fine Mist Spray Pump Core," which includes a pump core with its lower end connected to a suction tube. The pump core is characterized by a piston inside, a valve stem at its upper end, a liquid outlet hole in the middle of the valve stem, and the upper end of the valve stem extending out of the pump core and connecting to a cap. The upper end of the piston has a protrusion that mates with the liquid outlet hole of the valve stem. The outer wall of the piston has a valve structure that tightly seals against the inner wall of the pump core. A liquid storage chamber is formed between the lower end of the piston and the lower inner wall of the pump core. A spring supports the lower end of the piston, causing the piston to always tend to move upwards to close the liquid outlet hole. This pump core can meet the requirements of extremely fine spraying, but the spray stability and uniformity are not ideal and require further improvement. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a spray pump with a reasonable and compact structure and good spraying effect, which can achieve a more uniform and ultra-fine spray, in view of the above-mentioned technical status.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a spray pump, including a head cap, a large cover and a pump core, the lower end of the pump core is connected to a suction pipe, a piston and a piston rod are provided inside the pump core, the piston is sleeved outside the piston rod, the upper end of the piston rod passes through the pump core and the large cover and is connected to the head cap, a water outlet hole is provided on one side of the head cap, and a nozzle is embedded in the water outlet hole, characterized in that: the pump core adopts a double spring structure, the front end of the nozzle is provided with a spray hole with a diameter of 0.17~0.22mm, a conical vortex generating chamber is provided inside the spray hole, and the nozzle has an inlet channel, the angle of which is tangent to the inner wall of the vortex generating chamber.

[0008] Preferably, the entrance channel adopts a dual-channel design.

[0009] Ideally, the dual channels are arranged in a left-right rotational symmetry configuration.

[0010] Preferably, the diameter and height of the conical bottom of the vortex generating chamber are designed in a 1:1 ratio.

[0011] Furthermore, the piston rod is provided with a liquid outlet channel, and the lower side wall of the piston rod is provided with a liquid inlet hole that communicates with the liquid outlet channel. A lower valve is provided at the lower end of the piston rod. The piston is sleeved on the outside of the piston rod. The lower outer wall of the piston extends downward and is thinned to form a sealing structure that is in close contact with the inner wall of the pump core. The lower end of the piston abuts against the upper end of the lower valve. A liquid storage cavity is formed between the lower end of the piston and the inner wall of the pump core. In the double spring structure, the lower spring is supported between the lower end of the lower valve and the pump core, and the upper spring is supported between the upper end of the piston and the fixed part of the piston rod, so that the piston rod has a tendency to always move upward and close the liquid inlet hole.

[0012] Furthermore, the pump core is a cylindrical structure with an open top. The pump core is divided into three sections with a downwardly tapering diameter. The lowest section is the insertion section for inserting the suction tube. The middle section is cylindrical. The middle section and the lower section are connected by a slope. The lower outer wall of the piston is sealed tightly to the inner wall of the upper section of the pump core. A step is provided between the middle section and the upper section to limit the piston. A pump cover is fitted at the upper opening of the pump core. The pump cover has a central hole for the upper end of the piston rod to pass through.

[0013] Furthermore, the upper end of the large cover is formed with an annular groove for the head cap to be pressed in, and a through hole corresponding to the center hole of the pump cover is opened at the center of the upper end face of the large cover for the piston rod to pass through. After the pump core and the large cover are assembled, the upper end face of the pump cover abuts against the inner wall of the large cover. A limiting retaining ring is circumferentially protruding in the middle of the piston rod. A sealing 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 limiting retaining ring, so that the piston rod has a tendency to move upward and reset.

[0014] Furthermore, the upper end of the pump core extends outward to form an outer edge that connects with the cover. The inner wall of the upper end of the cover has a rib that abuts against the lower end of the outer edge. The upper end of the rib and the inner wall of the cover form a slot for the outer edge of the pump core to be engaged and positioned.

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

[0016] Compared with existing technologies, the advantages of this invention are as follows: the pump core adopts a double-spring structure, which increases the liquid outlet pressure, resulting in better and more stable atomization; the nozzle's vortex generating chamber is designed as a cone, and the inlet channel is designed as a double channel, with the inlet channel tangential to the vortex generating chamber, guiding the liquid into a rotating motion state to achieve a stable spray effect; the nozzle's spray orifice diameter is small, enabling fine spraying. This invention has a reasonable and compact structure, excellent spray effect, and can achieve stable, ultra-fine spraying, allowing the liquid to be sprayed evenly and finely onto the skin for a better makeup setting effect. It also has a good sealing effect, making it more hygienic to use. 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 sectional view;

[0019] Figure 3 A perspective sectional view of an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the nozzle structure;

[0021] Figure 5 This is a schematic diagram of the nozzle structure from another angle;

[0022] Figure 6 This is a cross-sectional view of the nozzle;

[0023] Figure 7 This is an exploded view of an embodiment of the present utility model. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0025] like Figures 1-7 As shown, a spray pump includes a cap 1, a cover 2, and a pump core 3. The lower end of the pump core 3 is connected to a suction pipe 40. The pump core 3 contains a piston 5 and a hollow piston rod 6. The piston 5 is sleeved outside the piston rod 6. The upper end of the piston rod 6 passes through the pump core 3 and the cover 2 and is connected to the cap 1. A water outlet 11 is provided on one side of the cap 1. A nozzle 4 is embedded in the water outlet 11. The pump core 3 adopts a double spring structure. The front end of the nozzle 4 has a spray hole 41 with a diameter of 0.17 to 0.22 mm. Due to the small diameter of the spray hole 41, a fine spray effect can be achieved. A conical vortex generating chamber 42 is provided inside the spray hole 41. The inlet of the nozzle 4 adopts a dual-channel design. The inlet channel 43 is tangential to the vortex generating chamber 42, which guides the liquid into a swirling state. The dual channels are symmetrically arranged for left and right rotation, which can achieve a stable spray effect. The diameter and height of the conical bottom of the vortex generating chamber 42 are designed in a 1:1 ratio, allowing the liquid to rotate before being sprayed, thus achieving a finer and more uniform atomization.

[0026] The piston rod 6 has a liquid outlet channel A inside. The lower side wall of the piston rod 6 has a liquid inlet hole 61 that communicates with the liquid outlet channel A. The lower end of the piston rod 6 has a lower valve 60. The piston 5 is sleeved on the piston rod 6. The lower outer wall of the piston 5 extends downward and is thinned to form a sealing structure that is in close contact with the inner wall of the pump core 3. The lower end of the piston 5 and the upper end of the lower valve 60 can cooperate to abut against each other. The lower end of the piston 5 and the inner wall of the pump core 3 form a liquid storage chamber B. In the double spring structure, the lower spring 8 is supported between the lower end of the lower valve 60 and the bottom of the pump core 3, and the upper spring 7 is supported between the upper end of the piston 5 and the fixed part of the piston rod 6, so that the piston rod 6 has a tendency to always move upward and close the liquid inlet hole 61.

[0027] Pump core 3 is a cylindrical structure with an open top. Pump core 3 consists of three sections with a downwardly narrowing diameter. The lowest section is the insertion section for the suction tube 40. The middle section is cylindrical. The middle section and the lower section are connected by a slope. The lower outer wall of piston 5 is sealed tightly to the upper inner wall of pump core 3. A step 31 is provided between the middle section and the upper section to limit the piston 5. Pump cover 30 is engaged and snapped onto the upper opening of pump core 3. A central hole is provided on pump cover 30 for the upper end of piston rod 6 to pass through. The cap 2 has an internal thread for connecting with the bottle body. A sealing gasket 20 is provided inside the cap 2. The upper end of the cap 2 is formed with an annular groove 21 for the cap 1 to be pressed in. A through hole corresponding to the center hole of the pump cover 30 is opened at the center of the upper end face of the cap 2 for the piston rod 6 to pass through. After the pump core 3 is assembled with the cap 2, the upper end face of the pump cover 30 abuts against the inner wall of the cap 2. A limiting ring 62 is circumferentially protruding in the middle of the piston rod 6 as a fixing part of the piston rod 6. A sealing ring 50 is provided between the limiting ring 62 and the inner wall of the lower end face of the pump cover 30. The upper spring 7 is sleeved on the piston rod 6 and supported between the upper end of the piston 6 and the limiting ring 62, so that the piston rod 6 has a tendency to move upward and reset. The upper end of the pump core 3 extends outward to form an outer edge 32 that mates with the cover 2. The inner wall of the upper end of the cover 2 has a raised rib that abuts against the lower end of the outer edge. The upper end of the raised rib and the inner wall of the cover 2 form a slot 22 for the outer edge of the pump core 3 to be engaged and positioned. A glass bead 9 is provided in the lower part of the pump core 2. The glass bead 9 and the inner wall of the pump core 2 are fitted together with a gap to form a one-way valve. The lower spring 8 is located above the glass bead 9 and is supported between the upper outer wall of the lower valve 60 and the bottom of the inner wall of the pump core 2.

[0028] The working principle is as follows: When the cap 1 is pressed, the piston rod 6 pushes the piston 5 downward, and the liquid stored in the reservoir B of the pump core 3 is discharged outward through the outlet channel A, forming a fine cone-shaped spray. At the same time, the reservoir B is emptied and the pressure increases significantly. When the cap 1 is released, the piston rod 6 moves upward and resets under the action of the upper spring 7 and the lower spring 8, forming a negative pressure. Under the action of negative pressure, the liquid in the bottle passes through the glass bead 9 and enters the reservoir B. Finally, the glass bead 9 falls back, closing the channel and ensuring that the liquid in the pump core 3 does not leak. At the same time, the volume of the reservoir B remains stable, preparing for the next press. The whole process is repeated as the user presses and releases the cap 10, completing multiple distribution operations, so that the liquid is evenly sprayed from the nozzle 4 and evenly sprayed onto the skin, achieving a good makeup setting effect.

[0029] The design process of this utility model will be described in detail below:

[0030] The key to achieving ultra-fine spray from a spray pump lies in the design of the pump core 2 and the nozzle 4.

[0031] I. Pump Core Design

[0032] Structure: It adopts a double spring structure, which can increase the liquid outlet pressure. The liquid outlet pressure determines the atomization intensity (high pressure → faster atomization).

[0033] Principle: The pressure inside the pump core 3 drives the liquid to be ejected at high speed. The liquid at the nozzle 4 hole loses its stable state and atomizes in a short time, achieving more uniform and lasting atomization.

[0034] II. Inlet Channel Angle Design of the Nozzle

[0035] The angle of the inlet channel 43 of the nozzle 4 controls the liquid rotation rate, which helps to form a uniform conical spray. The inlet channel 43 of this invention is tangential to the vortex generating chamber 42, guiding the liquid into a swirling state. The inlet channel 43 adopts a dual-channel design, which can achieve a stable spray effect.

[0036] III. Design of the Vortex Generating Chamber of the Nozzle

[0037] The vortex generation chamber provides a concentrated spray angle, which is beneficial for the concentration of facial setting spray and is a key factor in the spray effect.

[0038] The conical bottom of the vortex generating chamber 42 is designed with a 1:1 ratio between its diameter and height, allowing the liquid to rotate before being ejected, thus achieving a finer and more uniform atomization.

[0039] 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, comprising a cap, a cover, and a pump core, wherein the lower end of the pump core is connected to a suction pipe, a piston and a piston rod are disposed inside the pump core, the piston is sleeved outside the piston rod, the upper end of the piston rod passes through the pump core and the cover and is connected to the cap, and a water outlet is provided on one side of the cap, wherein a spray nozzle is embedded in the water outlet, characterized in that: The pump core adopts a double spring structure. The nozzle has a nozzle hole at the front end with a diameter of 0.17 to 0.22 mm. A conical vortex generating chamber is provided inside the nozzle hole. The nozzle has an inlet channel with the angle of the inlet channel tangent to the inner wall of the vortex generating chamber.

2. The spray pump of claim 1, wherein: The entrance passage adopts a dual-channel design.

3. The spray pump of claim 2, wherein: The dual channels are arranged in a left-right rotational symmetrical configuration.

4. The spray pump of claim 3, wherein: The cone-shaped bottom of the vortex generating chamber is designed with a 1:1 ratio between its diameter and height.

5. The spray pump according to any one of claims 1 to 4, characterized in that: The piston rod has a liquid outlet channel inside, and a liquid inlet hole connected to the liquid outlet channel is opened on the lower side wall of the piston rod. A lower valve is provided at the lower end of the piston rod. The piston is sleeved on the outside of the piston rod. The lower outer wall of the piston extends downward and is thinned to form a sealing structure that is in close contact with the inner wall of the pump core. The lower end of the piston abuts against the upper end of the lower valve. A liquid storage cavity is formed between the lower end of the piston and the inner wall of the pump core. In the double spring structure, the lower spring is supported between the lower end of the lower valve and the pump core, and the upper spring is supported between the upper end of the piston and the fixed part of the piston rod, so that the piston rod has a tendency to always move upward and close the liquid inlet hole.

6. The spray pump of claim 5, wherein: The pump core is a cylindrical structure with an open top. The pump core is divided into three sections with a downwardly narrowing diameter. The bottom section is the insertion section for the suction tube. The middle section is cylindrical. The middle section and the bottom section are connected by a slope. The lower outer wall of the piston is sealed tightly to the inner wall of the upper section of the pump core. A step is provided between the middle section and the upper section to limit the piston. A pump cover is fitted at the upper opening of the pump core. The pump cover has a central hole for the upper end of the piston rod to pass through.

7. The spray pump of claim 6, wherein: The upper end of the cover is formed with an annular groove for the head cap to be pressed in. The center of the upper end face of the cover is provided with a through hole corresponding to the center hole of the pump cover for the piston rod to pass through. After the pump core and the cover are assembled, the upper end face of the pump cover abuts against the inner wall of the cover. A limiting retaining ring is circumferentially protruding in the middle of the piston rod. A sealing 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 piston rod and supported between the upper end of the piston and the limiting retaining ring, so that the piston rod has a tendency to move upward and reset.

8. The spray pump of claim 7, wherein: The upper end of the pump core extends outward to form an outer edge that mates with the cover. The inner wall of the upper end of the cover has a raised rib that abuts against the lower end of the outer edge. The upper end of the raised rib and the inner wall of the cover form a slot for the outer edge of the pump core to be engaged and positioned.

9. The cosmetic setting spray pump core of claim 8, wherein: A glass bead is provided in the lower part of the pump core. The glass bead and the inner wall of the pump core are fitted together with a gap to form a one-way valve. The lower spring is located above the glass bead and is supported between the upper outer wall of the lower valve and the inner wall of the pump core.

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