A sound attenuating foam pump

Abstract

The application discloses a sound-absorbing foam pump, which comprises a large plunger, a small plunger and a vane, the large plunger and the small plunger are arranged in a vertical mode, the vane is arranged between the large plunger and the small plunger, the upper end of the vane extends into the large plunger and is in contact with the large plunger, the lower end of the vane is located outside the large plunger and is in sealing contact with a limiting block outside the upper end of the small plunger, so that an external air inlet and outlet channel is formed between the small plunger and the large plunger, the vane comprises a vane plate and a plurality of vane blocks fixed on the vane plate, each vane block is fixed around the circumferential edge of the vane plate, and adjacent two vane blocks are arranged in a spaced mode, the vane plate is in a flat circular structure or a non-circular closed ring structure, so that the flowing air perpendicular to the vane direction can uniformly impact on the vane plate and then change to flow in a horizontal direction between the interval between adjacent two vane blocks, and noise caused by vibration of the vane by the flowing air can be avoided. The application can avoid the problem that noise is generated by the first several pressing operations of each time pressing the cover, and thus the user experience is improved.

Description

Technical Field

[0001] This invention relates to the field of press-type liquid foam pump technology, specifically a silent foam pump. Background Technology

[0002] Nowadays, people pay more attention to personal hygiene and health. They are accustomed to using cleansing solutions when washing their hands, face, and showering to achieve hygiene. To meet this demand, most cleansing solutions are packaged in bottles and poured out for application. To avoid waste due to excessive dispensing, a pump dispenser is usually installed on the top of the container. For example, common bottled shower gels often have a pump dispenser, allowing users to dispense a specific amount of liquid according to their needs, making it convenient for them.

[0003] Existing conventional foam pumps on the market emit a very harsh sound during the first few presses of each use. This harsh sound is mainly due to the unreasonable design of the internal components of the foam pump, which causes the relevant components to vibrate when air passes through, creating a noise similar to a whistling sound. This noise makes the user experience very poor, and there are frequent complaints, resulting in a low user experience. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a noise-reducing foam pump that can solve the problem of noise generated during the pressing operation of existing foam pumps.

[0005] The technical solution to achieve the objective of this invention is as follows: a silencer foam pump, comprising a large beater, a small beater, and blades. The large beater and the small beater are arranged vertically, and the blades are positioned between the large beater and the small beater. The upper end of the blades extends into and contacts the large beater, and the lower end of the blades is located outside the large beater and is in sealing contact with a limiting block on the outer side of the upper end of the small beater, so that an external air inlet and outlet channel is formed between the small beater and the large beater.

[0006] The blade includes a blade plate and several blade blocks fixed on the blade plate. Each blade block is fixed around the circumferential edge of the blade plate, and adjacent blade blocks are spaced apart. The blade plate has a flat circular structure or a non-circular closed ring structure, so that the horizontally flowing air entering the fine-slotted groove parallel to the blade direction can be evenly directed onto the blade plate, so as to avoid the vertical airflow directly vibrating the blade and causing noise.

[0007] Furthermore, the blade plate abuts against the limiting block, and the blade block abuts against the large plate.

[0008] Furthermore, the large blade is provided with a groove that matches the blade block, and the blade block is embedded in the groove.

[0009] Furthermore, the leaf blades are in the form of thin flakes.

[0010] Furthermore, the blade block is sealed and attached to the blade plate in a horizontal position.

[0011] Furthermore, it also includes a clip that is mounted on the outside of the outer cover and is used to prevent the push-button from accidentally pressing the outer cover.

[0012] Furthermore, the large paddle includes an upper blade, a connector, and a lower blade. The upper blade is fixedly connected to one end of the connector, and the other end of the connector is fixedly connected to the lower blade. The lower blade extends laterally to both sides of the outer cover and extends to be movably connected to the inner wall of the end of the cylinder near the press head. The lower blade can slide axially along the inner wall of the end of the cylinder near the press head.

[0013] Furthermore, the other end of the large paddle is connected to the inner wall of the grinding cylinder near the pressure cap, and the large paddle can slide along the inner wall of the grinding cylinder.

[0014] The beneficial effects of this invention are: it can avoid the problem of noise generated during the first few presses of each time the cap is pressed, thereby improving the user experience. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 2 A schematic diagram showing the assembly between the blade and the fine plate;

[0017] Figure 3 This is a structural diagram for the large auction;

[0018] In the diagram, 1-compressor, 2-grip, 3-clamp, 4-outer cover, 401-placement area, 402-large blade, 403-inner cavity, 404-connector, 405-groove, 406-lower blade, 5-large blade, 6-blade, 61-blade plate, 62-blade block, 7-shield, 8-fine blade, 9-pull rod, 10-spring, 11-grip seat, 12-piston, 13-grip cylinder, 14-glass bead, 15-straw. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0020] like Figures 1 to 3As shown, a noise-reducing foam pump includes a pressure cap 1, a mesh screen 2, a clamp 3, an outer cover 4, a large flap 5, a blade 6, a gasket 7, a thin flap 8, a pull rod 9, a spring 10, a bearing seat 11, a piston 12, a friction cylinder 13, glass beads 14, and a suction tube 15. The lower end of the pressure cap 1 is snapped into the upper end of the outer cover 4, and the pressure cap 1 can move up and down relative to the outer cover 4 in the axial direction of the outer cover 4, so that the pressure cap 1 is fastened onto the outer cover 4. The large flap 5 is located in the inner cavity of the outer cover 4 and is in sealed contact with the outer cover 4. The inner cavity of the outer cover 4 includes an upper inner cavity and a lower inner cavity that are interconnected. The upper end of the large flap 5 extends into the upper inner cavity of the outer cover 4, and the lower end extends into the lower inner cavity of the outer cover 4. The end of the large flap 5 extending into the lower inner cavity is movably connected to the upper end of the friction cylinder 13, which is also located in the lower inner cavity of the outer cover 4. The end of the large flap 5 can slide up and down in the axial direction along the inner side wall of the upper end of the friction cylinder 13. The top of the massage cylinder 13 is fixedly connected to the outer cover 4, and the massage cylinder 13 can also be connected to the inner upper wall of the outer cover 4 through the gasket 7.

[0021] The large paddle 5 includes an upper blade 402, a connector 404, a lower blade 406, and a groove 405. The upper blade 402 is fixedly connected to the upper end of the connector 404, and the lower end of the connector 404 is fixedly connected to the lower blade 406. The blade 6 of the large paddle 5 and the upper end of the connector 404 form a U-shaped placement area 401. The inner cavity 403 is located at the end where the connector 404 is connected to the upper blade 402 and is below the placement area 401. The inner cavity 403 is connected to the placement area 401. The connection between the inner cavity 403 and the placement area 401 can be a direct connection without any obstruction, or a non-direct connection through other components (such as a filter with fine pores). The mesh 2 is installed in the placement area 401 and contacts the upper blade 402. The mesh 2 forms a columnar body and is connected to the inner cavity 403 below. The mesh 2 located in the placement area 401 is connected to the discharge channel of the pressure cap 1, so that the gas-liquid mixture discharged from the inner cavity 403 into the placement area 401 after pressing is squeezed out by the mesh 2 and forms foam, and the foam liquid is then discharged from the pressure cap 1. The large-blade blade 406 extends laterally to both sides of the outer cover 4 and extends to be movably connected to the inner wall of the upper end of the massage cylinder 13. The large-blade blade 406 can slide axially along the inner wall of the upper end of the massage cylinder 13.

[0022] A groove 405 is also provided on the connector 404 located on the outside of the inner cavity 403. The upper end of the blade 6 extends into the groove 405, and the lower end is located outside the groove 405 and in sealing contact with the limiting block on the outer side of the upper end of the fine blade 8, so that the horizontal interval groove on the fine blade 8 and the large blade 5 form an external air inlet and outlet channel. The limiting block is fixedly connected to the fine blade 8.

[0023] The blade 6 includes a blade plate 61 and several blade blocks 62 (i.e., inner blades of the blade 6) fixed on the blade plate 61. The blade blocks 62 can be thin-plate shaped, and each blade block 62 is fixed around the circumferential edge of the blade plate 61. The blade blocks 62 are horizontally sealed and attached to the blade plate 61. Adjacent blade blocks 62 are spaced apart so that there is a gap between any two adjacent blade blocks 62. The size of the gap can be adjusted according to the actual situation so that air can flow through the gap in a horizontal direction. The blade plate 61 has a flat circular structure or a non-circular closed annular structure, such as an elliptical or irregular annular structure. The purpose is to keep it flat in the horizontal direction so that the airflow that should be perpendicular to the direction of the blade 6 can enter the fine-stripped groove horizontally and evenly rush towards the blade plate 61. After being acted upon by the blade plate 61, it passes through the gap between the blade blocks 62, thereby avoiding the noise caused by the vertical airflow directly vibrating the blade 6.

[0024] Among them, the blade plate 61 abuts against the limiting block, the blade block 62 abuts against the upper part, and the large plate 5 is provided with a groove 405 that matches the blade block 62. The blade block 62 can be embedded in the groove 405 of the large plate 5.

[0025] Compared to the existing foam pump blades 6, in this embodiment, the air in the upper space of the grinding cylinder 13 is evenly and horizontally pushed open by the grooves around the fine beaters 8, preventing the air from vertically impacting the inner blades of the blades 6 and causing a piercing scream, thus avoiding noise similar to a howling sound. The air that passes through the blades 6 is also discharged into the external space through the gap between the large beaters 5 and the fine beaters 8.

[0026] refer to Figure 2 , Figure 2 The arrow in the image indicates the direction in which the flowing air is directed toward blade 6.

[0027] The upper end of the thin paddle 8 extends into the inner cavity 403 and connects to the large paddle 5. The lower end of the thin paddle 8 extends between the piston 12 and the piston seat located below, and is sealed and movablely connected to the outer wall of the upper end of the piston 12, so that the thin paddle 8 can slide up and down along the outer wall of the piston 12 in the axial direction, and the thin paddle 8 and the piston 12 always maintain a sealed contact connection during the sliding process. The lower end of the thin paddle 8 does not contact the bottom of the piston 12, leaving a certain space, so that the thin paddle 8 can move towards the bottom of the piston 12 in the axial direction until it contacts the bottom of the piston 12 and stops. The lower end of the piston 12 is sealed and movablely connected to the inner wall of the lower part of the friction cylinder 13, and the piston 12 and the inner wall of the friction cylinder 13 are in frictional contact, so that when the piston 12 moves up and down along the axial direction of the friction cylinder 13, the piston 12 slides against the inner wall of the friction cylinder 13 and maintains a sealed contact.

[0028] The entire thin paddle 8 located in the inner cavity 403 is sleeved on the spring 10, that is, the lower part of the thin paddle 8 is sleeved on the spring 10. The upper end of the spring 10 abuts against the limiting block, and the lower end of the spring 10 is between the thin paddle 8 and the friction seat 11. The lower end of the friction seat 11 abuts against the piston 12. When the piston 12 moves towards the large paddle 5 along the axial direction of the friction cylinder 13, when the piston 12 reaches the upper limit position, the piston 12 contacts the friction seat 11, thereby preventing the piston 12 from moving further towards the large paddle 5.

[0029] The pull rod 9 is suspended in the inner cavity of the thin paddle 8 and located at the end of the thin paddle 8 near the grinding cylinder 13. The movement gap allows the thin paddle 8 to move relative to the pull rod 9 in the axial direction of the thin paddle 8. That is, the thin paddle 8 can move in the axial direction before the pull rod 9 until the protrusion contacts the end of the groove 405 near the bottom of the grinding cylinder 13 and there is no movement gap. Then the thin paddle 8 drives the pull rod 9 to move together in the axial direction.

[0030] When pressed (i.e., in use), the thin plate 8 moves the pull rod 9 downwards along the axial direction, causing the lower end of the pull rod 9 to disengage from the piston 12, leaving a gap between the pull rod 9 and the piston 12. This gap allows air from the friction cylinder 13 below the piston 12 to flow into the thin plate 8. The aforementioned pressed or used state refers to the external force acting on the pressure cap 1 or the outer cover 4, causing the thin plate 8 to move axially towards the bottom of the friction cylinder 13, which in turn causes the thin plate 8 to move the pull rod 9 and the piston 12 together axially towards the bottom of the friction cylinder 13.

[0031] The glass beads 14 are installed at the lower end of the grinding cylinder 13, and the straw 15 is sleeved at the lower end of the grinding cylinder 13, with the straw 15 located below the glass beads 14. The glass beads 14 are used to prevent air from the outside of the grinding cylinder 13 and external air from entering the grinding cylinder 13 into the straw 15, and to prevent liquid in the container from being drawn into the grinding cylinder 13 through the straw 15 and then through the glass beads 14. In other words, the glass beads 14 act as a one-way conduit, allowing only the liquid in the straw 15 to flow into the lower space of the grinding cylinder 13 through the glass beads 14, and preventing backflow, including backflow of liquid and gas.

[0032] The clip 3 is fixedly installed on the outer cover 4 and presses against the pressure cover 1 to prevent the pressure cover 1 from being pressed down.

[0033] In actual use, the clip 3 is removed from the outer cover 4, and the pressure cap 1 is pressed with external force (e.g., by hand) to enter the pressing state. The pressure cap 1 acts on the outer cover 4, and the outer cover 4 moves the large paddle 5 axially toward the bottom of the massage cylinder 13. Then, the large paddle 5 moves the small paddle 8 axially toward the bottom of the massage cylinder 13, and the small paddle 8 moves the pull rod 9 axially toward the bottom of the massage cylinder 13. Since there is a gap between the upper end of the pull rod 9 and the small paddle 8, the small paddle 8 moves a short distance axially toward the bottom of the massage cylinder 13 before the pull rod 9 moves, thus opening the gap between the small paddle 8 and the pull rod 9, transforming a sealed channel into an open channel. During the axial movement of the small paddle 8, the spring 10 fitted on the small paddle 8 is compressed. When the thin plate 8 moves axially and comes into contact with the piston 12, the thin plate 8 drives the piston 12 to move axially toward the bottom of the grinding cylinder 13. The piston 12 slides along the inner wall of the grinding cylinder 13. Due to the friction between the piston 12 and the inner wall of the grinding cylinder 13, the pull rod 9 will move a short distance axially toward the bottom of the grinding cylinder 13 before the piston 12, causing the lower end of the pull rod 9 to disengage from the piston 12. This changes the previously sealed connection between the pull rod 9 and the piston 12 to an open one. In other words, the pull rod 9 and the piston 12 are no longer in contact, allowing the air between the glass bead 14 and the piston 12 to be discharged from the piston 12 into the pull rod 9. The air then flows through the open channel between the pull rod 9 and the thin plate 8 to the placement area 401, and finally through the pressure cap 1 to the outside. In other words, the air in the lower space of the grinding cylinder 13 is discharged to the external space through the open channel. The air in the upper space of the grinding cylinder 13, that is, the air in the space between the large paddle 5 and the grinding cylinder 13, is discharged to the external space through the rib gap between the large paddle 5 and the small paddle 8. During this process, the outer cover 4 moves the large paddle 5 downwards, and because the blade 6 extends into the groove 405 of the large paddle 5, the large paddle 5 moves the blade 6 downwards. The blade 6 is acted upon by the limiting block, thus opening the seal between the blade 6 and the large paddle 5, thereby forming a rib gap between the large paddle 5 and the small paddle 8. The air in the upper space of the grinding cylinder 13 is discharged to the placement area 401 through this rib gap, and finally discharged to the outside through the pressure cover 1. The so-called rib gap refers to a very small gap that allows air to flow through.

[0034] The fine beat 8 structure changes the airflow that was originally perpendicular to the blade 6 to a horizontal flow, thus preventing the air from vertically impacting the inner blade of the blade 6 and causing a piercing scream. The airflow is also discharged into the external space through the gap between the large beat 5 and the fine beat 8.

[0035] Because the lower end of piston 12 is in sealed contact with the inner wall of the lower part of the grinding cylinder 13, and the upper end of piston 12 is in sealed contact with the fine beater 8, the grinding cylinder 13 is divided into an upper space and a lower space that are isolated from each other. Air cannot flow between the upper and lower spaces of the grinding cylinder 13, meaning that the upper and lower spaces of the grinding cylinder 13 are not connected. The upper space of the grinding cylinder 13 is the space enclosed by the fine beater 8, the large beater 5, and the grinding cylinder 13, while the lower space of the grinding cylinder 13 is the space enclosed by the glass bead 14, piston 12, and grinding cylinder 13.

[0036] Specifically, the lower space of the aforementioned grinding cylinder 13 refers to the lower inner cavity space of the grinding cylinder 13 between the glass bead 14 and the piston 12, and the upper space of the grinding cylinder 13 refers to the upper inner cavity space of the grinding cylinder 13 between the large paddle 5, the piston 12, and the small paddle 8.

[0037] The above describes how, after pressing the cap 1 for the first time (that is, pressing the cap 1 from its initial position to its axial downward limit position), the air inside the foam pump body is expelled, which also means the air in the lower space of the cylinder 13 is expelled.

[0038] When the pressure cap 1 is released (the hand is released), under the action of the spring 10, the pull rod 9 moves upward in the axial direction and re-seales with the piston 12. After re-sealing with the piston 12, the pull rod 9 and the piston 12 move together in the axial direction towards the pressure cap 1, so that the upper end of the pull rod 9 and the contact surface of the fine plate 8 form the sealing slope again. Because the air between the glass beads 14 and the piston 12 is discharged, there is a pressure difference between the inside and outside of the foam pump body. The pressure inside the foam pump body is less than the pressure outside the foam pump body, and a local vacuum environment (close to a vacuum environment) is formed in the lower space of the friction cylinder 13. As a result, the pressure inside the container where the suction tube 15 is located is greater than the pressure in the lower space of the friction cylinder 13 where the glass beads 14 are located. Therefore, the glass beads 14 move slightly in the axial direction towards the piston 12 and open. The liquid in the container flows through the suction tube 15 and over the glass beads 14 into the lower space of the friction cylinder 13 for storage.

[0039] When the cap 1 is pressed again (for the second time), the above movement is repeated. That is, the air in the lower space of the massage cylinder 13 is first expelled to form a local vacuum environment, and then the liquid is sucked in through the suction tube 15 and discharged into the lower space of the massage cylinder 13. However, the difference is that when the cap 1 is pressed for the second time, the liquid stored in the lower space of the massage cylinder 13 is discharged. Specifically, the liquid stored in the lower space of the massage cylinder 13 is first discharged through the piston 12 into the inner cavity of the thin paddle 8 located above the piston 12, and then discharged into the placement area 401 through the open channel between the pull rod 9 and the thin paddle 8. It mixes with the air discharged into the placement area 401 through the bone gap. The liquid and air mix to form a gas-liquid mixture. The gas-liquid mixture is foamed by the massage mesh 2 to form foam, thereby turning the liquid into foam. The foam is then finally discharged to the outside through the cap 1 (the cap 1 has a channel in the middle), thus completing the pressing of liquid to form foam and discharge. Among them, the mesh 2 is provided with mesh to form a mesh structure with fine holes. The gas-liquid mixture foams and forms fine foam through the mesh.

[0040] When pressing the outer cover 4 stops (e.g., releasing the hand), because the air in the upper part of the pump cylinder 13 has been expelled, the external pressure of the foam pump body is greater than the pressure in the upper space of the pump cylinder 13 and the pressure inside the container. This causes external air to first enter the space above the large beater 5 through the gap between the pressure cap 1 and the outer cover 4. Some of the air entering the space above the large beater 5 enters the container through the small hole in the upper part of the pump cylinder 13, thereby restoring the pressure balance inside and outside the container for reciprocating use. During the return of the spring 10, a gap is formed between the push blade 6 and the limiting block, allowing another portion of the air flowing into the upper space to flow into the gap between the large beater 5 and the small beater 8, so that air can enter the upper space of the pump cylinder 13, that is, external air enters the air between the pump cylinder 13 and the large beater 5 to maintain air pressure balance. This allows for the next pressing of the liquid to produce foam. By continuously performing the above operation, that is, by repeatedly pressing and releasing the cap 1, foam liquid can be continuously pressed out until the liquid is consumed or the external force disappears.

[0041] In actual use, due to the design of the fine-tap 8 structure, the noise generated during the first few presses of the cover 1 can be avoided, thereby improving the user experience.

[0042] The embodiments disclosed in this specification are merely illustrative of one aspect of the invention, and the scope of protection of the invention is not limited to these embodiments. Any other functionally equivalent embodiments fall within the scope of protection of the invention. Those skilled in the art can make various other corresponding changes and modifications based on the technical solutions and concepts described above, and all such changes and modifications should fall within the scope of protection of the claims of this invention.

Claims

1. A silencer foam pump, characterized in that, It includes a large blade, a small blade, and blades. The large blade and the small blade are arranged one above the other, and the blade is located between the large blade and the small blade. The upper end of the blade extends into the large blade and contacts it, while the lower end of the blade is located outside the large blade and is in sealed contact with the limiting block on the outer side of the upper end of the small blade. This allows the horizontal spacer groove of the small blade to form an external air inlet and outlet channel with the large blade. The blade includes a blade plate and several blade blocks fixed on the blade plate. Each blade block is fixed around the circumferential edge of the blade plate, and adjacent blade blocks are spaced apart. The blade plate has a flat circular structure or a non-circular closed ring structure, so that the horizontally flowing air entering the fine-slotted groove parallel to the blade direction can be evenly directed onto the blade plate, so as to avoid the vertical airflow directly vibrating the blade and causing noise.

2. The silencer foam pump according to claim 1, characterized in that, The blade plate abuts against the limiting block, and the blade block abuts against the large plate.

3. The silencer foam pump according to claim 2, characterized in that, The large blade has a groove that fits the blade block, and the blade block is embedded in the groove.

4. The silencer foam pump according to claim 3, characterized in that, The leaf blades are in the form of thin flakes.

5. The silencer foam pump according to claim 4, characterized in that, The blade block is sealed and attached to the blade plate in a horizontal position.

6. The silencer foam pump according to claim 1, characterized in that, It also includes clips that are installed on the outside of the outer cover to prevent the push-button from accidentally pressing on the outer cover.

7. The silencer foam pump according to claim 1, characterized in that, The large paddle includes an upper blade, a connector, and a lower blade. The upper blade is fixedly connected to one end of the connector, and the other end of the connector is fixedly connected to the lower blade. The lower blade extends laterally to both sides of the outer cover and extends to be movably connected to the inner wall of the end of the massage cylinder near the head. The lower blade can slide axially along the inner wall of the end of the massage cylinder near the head.

8. The silencer foam pump according to claim 1, characterized in that, The other end of the large paddle is connected to the inner wall of the grinding cylinder near the pressure cap, and the large paddle can slide along the inner wall of the grinding cylinder.

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