Adjustable liquid dispenser pump head

Abstract

This invention belongs to the field of liquid dispensing technology, and specifically discloses an adjustable dispensing pump head, including a pump body and a piston. A cavity is formed between the pump body and the piston. The piston can slide along the pump body and squeeze the cavity between the pump body and the piston to ultimately dispense liquid. The invention is characterized in that: an adjustment component is provided at the corresponding position of the pump body and the piston. The piston can adjust the capacity of the cavity pressed by the piston through the adjustment component to ultimately adjust the dispensing volume.

Description

Technical Field

[0001] This invention belongs to the field of liquid dispensing technology, specifically relating to an adjustable dispensing pump head. Background Technology

[0002] A liquid dispenser pump head is a device that squeezes liquid out of a bottle. The liquid dispenser pump head and the bottle containing liquid (such as hand sanitizer, shower gel, etc.) can be installed together in public restrooms, hotels, and other places. The liquid dispenser pump head can be connected to a foaming device, which foams the liquid squeezed out by the liquid dispenser pump head into foam and discharges it.

[0003] The applicant has described a liquid dispenser pump head in detail in Chinese Utility Model Patent No. 2021220578433, which was filed in 2021. However, in the actual application of this liquid dispenser pump head, we found that the piston pressing path in the liquid dispenser pump head is fixed. That is to say, each time the piston of the liquid dispenser pump head is pressed, the piston can only be pressed to a uniform depth. Therefore, the final liquid dispensing volume is also fixed. Users cannot adjust the liquid dispensing volume when pressing, which cannot meet different usage needs.

[0004] Therefore, it is necessary to develop a new liquid outlet pump head that can adjust the liquid output to meet different usage requirements. Summary of the Invention

[0005] In order to solve the above-mentioned problems in the prior art, the present invention aims to provide an adjustable liquid outlet pump head.

[0006] The technical solution adopted in this invention is as follows:

[0007] An adjustable liquid dispenser pump head includes a pump body and a piston, with a cavity formed between the pump body and the piston. The piston can slide along the pump body and squeeze the cavity between the pump body and the piston to ultimately dispense liquid. The pump body and the piston are equipped with adjustment components at corresponding positions, and the piston can adjust the capacity of the cavity it presses through the adjustment components to ultimately adjust the liquid dispensing volume.

[0008] In some embodiments, the adjusting component is a stroke adjusting component. The piston can adjust its pressing depth and the volume of the cavity between the pump body and the piston through the stroke adjusting component, thereby ultimately adjusting the liquid output. Therefore, the greater the piston's pressing stroke, the deeper the piston can be pressed, and the greater the volume of the cavity between the pump body and the piston, resulting in a correspondingly larger liquid output.

[0009] In some embodiments, the adjusting component includes an annular adjusting ring disposed on the back of the piston and a baffle disposed inside the pump body. The piston causes the annular adjusting ring to abut against the baffle at different positions, thereby adjusting the piston's pressing stroke. Thus, by setting the annular adjusting ring structure, the piston's stroke varies when it abuts against the baffle at different positions, resulting in different volumes of compressed cavity and consequently different liquid outputs.

[0010] In some embodiments, the baffle has a step formed at the end near the center of the pump body. Rotating the annular adjusting ring allows different positions of the annular adjusting ring to abut against the step, thus adjusting the piston's pressing stroke. Therefore, the height (or thickness) of the annular adjusting ring varies at different positions, thereby adjusting the pressing stroke.

[0011] In some embodiments, the annular adjusting ring includes two staggered fan-shaped grooves, two fan-shaped planes, and two fan-shaped protrusions. The annular adjusting ring can adjust three strokes of the piston. The two fan-shaped grooves are arranged opposite each other, the two fan-shaped planes are arranged opposite each other, and the two fan-shaped protrusions are arranged opposite each other. Thus, by rotating the piston, the fan-shaped grooves, fan-shaped planes, and fan-shaped protrusions can be made to abut against the step, thereby adjusting the pressing stroke of the piston.

[0012] In some embodiments, the arc angle of each sector groove, sector plane, and sector protrusion is 60°. This arc angle allows each sector groove, sector plane, and sector protrusion to abut against the step.

[0013] In some embodiments, a housing is also included, on which an indicator is provided, and three gear positions are displayed on the front of the piston. Thus, the current gear position can be clearly displayed via the indicator on the housing.

[0014] In some embodiments, the housing has an arc-shaped protrusion, and the piston has an arc-shaped groove. The arc-shaped protrusion can engage with the arc-shaped groove. Therefore, a certain external force is required to rotate the piston, preventing it from rotating on its own and thus automatically adjusting the gear position, which would affect its use.

[0015] In some embodiments, a stabilizing block is also provided inside the pump body, and the stabilizing block is in contact with the back of the adjusting component.

[0016] The beneficial effects of this invention are as follows: In this invention, the piston is installed in the pump body and can slide along the pump body, compressing the cavity between the pump body and the piston, thereby discharging liquid. Since adjusting components are provided at corresponding positions on the pump body and the piston, the piston can adjust the volume of the cavity it presses against the pump body and the piston through these adjusting components, ultimately regulating the liquid output. Therefore, different usage requirements can be met.

[0017] In addition, the specific adjustment can be as follows: rotate the piston, and the two fan-shaped grooves, two fan-shaped planes and two fan-shaped protrusions on the back of the piston can successively abut against the step, thereby adjusting the piston's pressing stroke and ultimately adjusting the liquid output. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the adjustable liquid outlet pump head according to one embodiment of the present invention;

[0019] Figure 2 for Figure 1 The diagram shows the structure of the adjustable liquid outlet pump head after the piston and housing are hidden.

[0020] Figure 3 for Figure 2 The front view of the adjustable liquid outlet pump head is shown.

[0021] Figure 4 for Figure 1 The diagram shows the back structure of the piston in the adjustable liquid outlet pump head.

[0022] Figure 5 for Figure 4 The image shows a rear view of the piston in the adjustable liquid outlet pump head.

[0023] Figure 6 for Figure 1 The diagram shows the structure of the adjustable liquid outlet pump head along the AA direction.

[0024] In the diagram: 1-Pump body; 11-Baffle; 111-Step; 12-Stabilizing block; 13-Positioning pin; 2-Piston; 21-Fan-shaped groove; 22-Fan-shaped plane; 23-Fan-shaped protrusion; 24-Arc-shaped groove; 3-Shell; 31-Arc-shaped protrusion; 32-Indicator; 4-Rubber ring; 5-First spring; 6-Cavity; 7-Connecting pipe; 71-Connecting cavity; 8-Glass bead; 9-One-way valve; 91-Second spring. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Figures 1-6 The diagram schematically illustrates the structure of an adjustable liquid outlet pump head according to one embodiment of the present invention.

[0028] For ease of understanding, part of the structure of the present invention will now be described. The adjustable liquid outlet pump head includes a pump body 1 and a piston 2. A cavity 6 can be formed between the pump body 1 and the piston 2. Two rubber rings 4 are installed between the pump body 1 and the piston 2. The two rubber rings 4 can isolate the cavity 6 from the outside, that is, seal the cavity 6. One rubber ring 4 is installed between the front outer wall of the piston 2 and the pump body 1. A step is provided at the middle position of the pump body 1, and the other rubber ring 4 is installed on the step at the middle position of the pump body 1. Additionally, a spring 5 is also installed between the pump body 1 and the piston 2.

[0029] At the same time, such as Figure 1 and Figure 6 As shown, a connecting pipe 7 is integrally formed on the back of the pump body 1. The upper end of the connecting pipe 7 can be connected to a bottle containing liquid, such as soap solution or hand sanitizer, and the lower end of the connecting pipe 7 can be connected to a liquid outlet component, such as an atomizing plate or a foaming head. A connecting cavity 71 is integrally formed on the connecting pipe 7, and the cavity 6 and the connecting cavity 71 are interconnected (the cavity 6 and the connecting cavity 71 are always in a connected state). A glass bead 8 is provided at the upper end of the connecting cavity 7, and a one-way valve 9 is provided at the lower end of the connecting cavity 7. A second spring 91 is installed at the lower end of the one-way valve 9. Under normal conditions, the upper end of the second spring 91 can abut against the one-way valve 9.

[0030] The working process of this invention is as follows: When there is no liquid in the cavity 6 and the connecting cavity 71, the piston 2 is pressed. At this time, the one-way valve 9 moves downward and the glass bead 8 moves upward. The glass bead 8 blocks the upper end of the connecting cavity 71, and the gas in the cavity 6 is discharged from the one-way valve 9. The piston 2 is released, and the piston 2 returns to its original position under the elastic force of the first spring 5. At this time, the glass bead 8 moves downward (falls), and the one-way valve 9 returns to its original position under the action of the second spring 92, blocking the lower end of the connecting cavity 71. The liquid in the bottle connected to the glass bead 8 enters the connecting cavity 71. This process is repeated so that the connecting cavity 71 and the cavity 6 can be filled with liquid.

[0031] After the liquid is filled, press the empty piston 2 again. At this time, the one-way valve 9 moves downward and the glass bead 8 moves upward. The glass bead 8 blocks the upper end of the connecting cavity 71. The connecting cavity 71 and the empty cavity 6 flow out from the one-way valve 9 and are discharged through the liquid outlet components, such as the atomizing plate and the foaming head. That is, the liquid is discharged by atomization or foaming. Release the piston 2. Under the elastic force of the first spring 5, the piston 2 returns to its original position. At this time, the glass bead 8 moves downward (falls). The one-way valve 9 returns to its original position under the action of the second spring 92, blocking the lower end of the connecting cavity 71. The liquid in the bottle connected to the glass bead 8 enters the connecting cavity 71. Repeat this process to continuously press out the liquid.

[0032] During the pressing process, it can be determined that the pressing stroke of piston 2 (that is, the maximum distance it can move) determines the volume of liquid flowing out. In other words, the larger the volume of the cavity 6 that piston 2 compresses, the greater the liquid output, and vice versa.

[0033] The improved technical solution of the present invention is described in detail below:

[0034] In this embodiment, an adjustment component is provided at the corresponding position of the pump body 1 and the piston 2. The piston 2 can adjust the capacity of the cavity 6 of the pump body 1 by adjusting the adjustment component (it can be considered that the piston 2 presses the size of the cavity 6 of the pump body 1), that is, it can adjust the amount of liquid squeezed by the cavity 6 into the connecting cavity 71, so as to ultimately adjust the liquid output.

[0035] In this embodiment, as Figures 2-4 As shown, the adjusting component is a stroke adjusting component. The piston 2 can adjust the pressing depth of the piston 2 itself and the capacity of the pressing cavity 6 through the stroke adjusting component, so as to ultimately adjust the liquid output. The greater the pressing stroke of the piston 2, the deeper the piston 2 can be pressed, and the greater the capacity of the cavity 6 of the pump body 1 and the piston 2 that is pressed. Correspondingly, the cavity 6 squeezes the liquid in the connecting cavity 71, and the liquid output is also correspondingly greater.

[0036] In this embodiment, as Figures 2-4 As shown, the adjusting component includes an annular adjusting ring disposed on the back of the piston 2 and a baffle 11 disposed inside the pump body 1. The piston 2 causes the annular adjusting ring to abut against the baffle 11 at different positions, thereby adjusting the pressing stroke of the piston 2. By setting the structure of the annular adjusting ring, the pressing stroke of the piston 2 can be different when it abuts against the baffle 11 at different positions, and ultimately the pressing capacity in the cavity of the pump body 1 and the piston 2 is also different, and the liquid output is also different.

[0037] Specifically, such as Figure 2 and Figure 3As shown, in this embodiment, a step 111 is formed at the end of the baffle 11 near the center of the pump body 1. The height of the step 111 is higher than the height of the end of the baffle 11 away from the center of the pump body 1. By rotating the annular adjusting ring, different positions of the annular adjusting ring can abut against the step 111, thereby adjusting the pressing stroke of the piston 2. In this embodiment, the height of different positions of the annular adjusting ring is different, which can adjust the pressing stroke.

[0038] Specifically, such as Figure 4 and Figure 5 As shown, the annular adjustment ring includes two staggered fan-shaped grooves 21, two fan-shaped planes 22, and two fan-shaped protrusions 23. The annular adjustment ring can adjust the three strokes of the piston 2. The two fan-shaped grooves 21 are arranged opposite each other, the two fan-shaped planes 22 are arranged opposite each other, and the two fan-shaped protrusions 23 are arranged opposite each other. By rotating the piston 2, the fan-shaped grooves 21, the fan-shaped planes 22, and the fan-shaped protrusions 23 can be made to abut against the step 111 respectively, thereby adjusting the pressing stroke of the piston 2.

[0039] In this embodiment, as Figure 4 and Figure 5 As shown, the arc angle of each sector-shaped groove 21, sector-shaped plane 22 and sector-shaped protrusion 23 is 60°. This arc angle allows the sector-shaped groove 21, sector-shaped plane 22 and sector-shaped protrusion 23 to abut against the step 111 respectively.

[0040] like Figure 1 As shown, in this embodiment, a housing 3 is also included. The housing 3 is fixed on the pump body 1. An indicator 32 is integrally formed on the housing 3. The front of the piston 2 can be integrally formed with three gear numbers. There are two of each gear number. The three gear numbers are distributed alternately. The same gear numbers are set opposite each other (that is, the same gear numbers are located opposite each other). The current gear can be displayed intuitively through the indicator 32 on the housing 3.

[0041] like Figure 1 As shown, in this embodiment, the housing 3 has an integrally formed arc-shaped protrusion 31, and the piston 2 has an integrally formed arc-shaped groove 24. The arc-shaped protrusion 31 can lock the arc-shaped groove 24, and the piston 2 needs to be rotated with a certain external force to prevent the piston 2 from rotating on its own and thus adjusting the gear position on its own, which would affect its use.

[0042] like Figure 1 As shown, in this embodiment, a stabilizing block 12 is integrally formed inside the pump body 1, and the stabilizing block 12 is in contact with the back of the adjusting component.

[0043] The following is a detailed description of the overall gear adjustment process of this invention:

[0044] Combination Figures 1-6 , Figure 1Piston 2 is in "gear 3". At this time, after piston 2 is fully pressed down, Figure 4 The fan-shaped groove 21 on the back of the piston 2 abuts against the step 111. At the same time, since there is a gap between the stabilizing block 12 and the positioning component, the fan-shaped protrusion 23 will not contact the stabilizing block 12. The flat surface on the back of the piston 2 contacts the stabilizing block 12. The stabilizing block 12 can prevent the piston 2 from shaking when it is pressed to the deepest position, thus affecting the user experience.

[0045] To adjust the pressing stroke of piston 2, rotate piston 2 until it is in "position 2". At this point, piston 2 is fully pressed down (i.e., pressed to its deepest position). Figure 4 The fan-shaped plane 22 in the middle abuts against the step 111. At this time, the pressing stroke of the piston 2 is the second largest (that is, the pressing depth is the second largest).

[0046] When you want to readjust the pressing stroke of piston 2, rotate piston 2 so that piston 2 is in "position 1". At this time, after piston 2 is fully pressed (i.e., pressed to the deepest state), the fan-shaped protrusion 23 abuts against step 111. At this time, the pressing stroke of piston 2 is the minimum.

[0047] In this invention, piston 2 is installed in pump body 1 and can slide along pump body 1, squeezing the cavity 6 between pump body 1 and piston 2 to dispense liquid. Since adjusting components are provided at corresponding positions on pump body 1 and piston 2, piston 2 can adjust the capacity of the cavity 6 it presses against pump body 1 via these components, thereby ultimately adjusting the liquid dispensing rate. Therefore, different usage requirements can be met.

[0048] In addition, the specific adjustment can be as follows: rotate piston 2, and the two fan-shaped grooves 21, two fan-shaped planes 22 and two fan-shaped protrusions 23 on the back of piston 2 can abut against step 111 in sequence, thereby adjusting the pressing stroke of piston 2.

[0049] This invention can be applied to applications requiring foaming, liquid dispensing, and spraying.

[0050] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. An adjustable liquid dispenser pump head, comprising a pump body (1) and a piston (2), wherein a cavity (6) is formed between the pump body (1) and the piston (2), and the piston (2) is slidable along the pump body (1) to compress the cavity (6) between the pump body (1) and the piston (2) to ultimately dispense liquid, characterized in that: Adjustment components are provided at corresponding positions of the pump body (1) and piston (2). The piston (2) can adjust the capacity of the cavity (6) between the pump body (1) and piston (2) by adjusting the adjustment components, so as to ultimately adjust the liquid output. The adjusting component includes an annular adjusting ring on the back of the piston (2) and a baffle (11) on the inner wall of the pump body (1). The piston (2) causes the annular adjusting ring to abut against the baffle (11) at different positions, thereby adjusting the pressing stroke of the piston (2). The baffle (11) has a step (111) formed at one end near the center of the pump body (1). The annular adjusting ring is rotated so that different positions of the annular adjusting ring can abut against the step (111), thereby adjusting the pressing stroke of the piston (2). The annular adjusting ring includes two staggered fan-shaped grooves (21), two fan-shaped planes (22), and two fan-shaped protrusions (23). The annular adjusting ring can adjust the three strokes of the piston (2). The two fan-shaped grooves (21) are arranged opposite each other, the two fan-shaped planes (22) are arranged opposite each other, and the two fan-shaped protrusions (23) are arranged opposite each other.

2. The adjustable liquid outlet pump head according to claim 1, characterized in that: The arc angle of each of the said sector groove (21), the sector plane (22) and the sector protrusion (23) is 60°.

3. The adjustable liquid outlet pump head according to claim 1 or 2, characterized in that: It also includes a housing (3), on which an indicator (32) is provided, and the front of the piston (2) is provided with three gear numbers.

4. The adjustable liquid outlet pump head according to claim 3, characterized in that: The casing (3) is provided with an arc-shaped protrusion (31), and the piston (2) is provided with an arc-shaped groove (24). The arc-shaped protrusion (31) can lock the arc-shaped groove (24).

5. The adjustable liquid outlet pump head according to claim 2, characterized in that: The pump body (1) is also provided with a stabilizing block (12), which is in contact with the back of the adjusting component.

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