Dropper type metering pump and cosmetic container with same

Abstract

The invention discloses a dropper type metering pump which comprises an elastic balloon and further comprises a fixed-stroke reciprocating mechanism. The fixed-stroke reciprocating mechanism comprises a reciprocating motion part; the reciprocating motion part can be limited and stopped at a stroke end point; the reciprocating motion part acts on the elastic balloon through a fixed stroke, so that the space compression amount of each time is equal. The fixed-stroke reciprocating mechanism further comprises a special-shaped gear. The reciprocating motion component shifts the special-shaped gear to rotate, and when the special-shaped gear is located at different rotation angles, the reciprocating motion component is sequentially located in circulation of descending, limited stopping and rebounding. The scheme has the beneficial effects that the stop position is arranged at the stroke end point of the reciprocating motion part, and the stroke of the reciprocating motion part can be fixed, so that the fixed stroke of the reciprocating motion part is converted into a fixed space decrement value of the elastic balloon, and finally the fixed liquid taking amount each time is obtained.

Description

Technical Field

[0001] The present invention relates to the field of plastic packaging for cosmetics, and specifically to a dropper-type metering pump and a cosmetic container with such a dropper-type metering pump. Background Art

[0002] For liquid cosmetics or liquid medicines used in small doses, a relatively precise liquid extraction mechanism is required to ensure that the volume of the liquid taken out each time is not much different. For traditional metering pumps, such as the "anti-leak external spring emulsion pump" disclosed in Chinese Patent Document CN209905443U on January 7, 2020, which includes a nozzle and an inner cylinder. The nozzle is arranged at the upper end of the upper pump column, and a discharge channel is processed in the nozzle. The inner cylinder is arranged at the top of the pump body, and a lower pump column is arranged in the inner cylinder. The structure of the present invention is simple, and the top claw is used in cooperation with the pump bead, and the top column is used to ensure the stability of the claw structure. At the same time, it cooperates with the pump bead below to ensure that the liquid in the pump body flows into the discharge channel through the material port, the lower pump column and the upper pump column and is pumped out after the nozzle is pressed. The pressure is stable, and the emulsion in the upper pump column can be effectively prevented from overflowing, improving the use effect; the inner cylinder, the upper pump column and the lower pump column are used in cooperation to realize the liquid extraction of the metering pump. The pump plug is clamped by the inner cylinder and the lower pump column, and at the same time, the lower pump column limits the pump plug, which can effectively ensure the airtightness inside the pump body, avoid processing exhaust holes, and effectively prevent the liquid in the pump body from overflowing. Such traditional metering pumps adopt the classic combination of a piston, a spring and a closing bead, and cannot be applied to the dropper-type liquid extraction method.

[0003] "Pump with Convenient Recycling" disclosed in Chinese Patent Document CN118239123A on June 25, 2024, includes an elastic balloon and a liquid suction tube. The upper end of the liquid suction tube is hermetically connected to the lower end opening of the elastic balloon. The elastic balloon is made of PP material; the liquid suction tube is made of PP material. The main body part of the elastic balloon is provided with folding grooves, and the folding direction of the folding grooves is parallel to the axial direction of the pump. The folding grooves are spiral grooves. It also includes a balloon mounting ring made of PP material; a concave mounting groove is provided below the elastic balloon, and a balloon side mating step protrudes radially from the bottom; correspondingly, the top of the balloon mounting ring is provided with a mounting ring side mating step, and the mounting ring side mating step presses tightly on the upper end surface of the balloon side mating step, and the inner side surface of the mounting ring side mating step is adaptively clamped in the mounting groove. The beneficial effect of this solution is that all parts are made of a single material, so the entire pump can be recycled without disassembly, and the recycling cost is low, which can well promote the recycling work and is beneficial to the environment. "Non-toxic Liquid Sampler" disclosed in Chinese Patent Document CN118239122A on June 25, 2024, includes a liquid sampling ball and a liquid suction tube. The liquid sampling ball is a hollow capsule with only the lower end opening, and the liquid suction tube is a tube body with both upper and lower ends open. The upper end opening is hermetically connected to the lower end opening of the liquid sampling ball. The liquid sampling ball is made of non-toxic elastic PP material; it also includes a bottle cap made of non-toxic rigid PP material; the liquid suction tube is made of non-toxic rigid PP material. The shape of the liquid sampling ball is cylindrical, and a liquid sampling ball side skirt extends outward from the bottom of the lower end; the upper end of the bottle cap is provided with a bottle cap top plate, and a through bottle cap hole is provided on the bottle cap top plate. The main body part of the liquid sampling ball passes upward through the bottle cap hole, and the bottle cap top plate is tightly laminated above the liquid sampling ball side skirt. The beneficial effect of this solution is that all parts are made of safe and non-toxic PP, completely eliminating the potential hazards of chemical and physical injuries that traditional liquid samplers may cause to users; the entire liquid sampler can be recycled without disassembly, and the recycling cost is low, which can well promote the recycling work and is beneficial to the environment.

[0004] In the above two solutions, both are typical dropper-type liquid sampling methods. Their main feature is that they adopt a structure of an elastic balloon plus a liquid suction tube. The user forms a negative pressure by pressing and releasing the elastic balloon, and then sucks the liquid through the liquid suction tube. Since it is difficult to precisely control the pressing area and depth of the elastic balloon, there are significant differences in the space reduction formed by each press, so the negative pressure formed also varies greatly, and the volume of the liquid sucked naturally varies greatly. Summary of the Invention

[0005] Based on the above problems, the present invention provides a dropper-type metering pump that can achieve quantitative liquid sampling in the dropper-type liquid sampling method. On this basis, this solution also provides a cosmetic container applying this type of dropper-type metering pump.

[0006] To achieve the first object of the invention, the present invention adopts the following technical solution: A dropper-type metering pump includes an elastic balloon, It also includes a fixed-stroke reciprocating mechanism; The fixed-stroke reciprocating mechanism includes a reciprocating component; the reciprocating component can be restricted to stop at the end of the stroke; The reciprocating component acts on the elastic balloon through a fixed stroke, making the spatial compression amount equal each time.

[0007] Preferably, the fixed-stroke reciprocating mechanism further includes a special-shaped gear; the reciprocating component toggles the special-shaped gear to rotate. When the special-shaped gear is at different rotation angles, the reciprocating component is successively in a cycle of moving downward, being restricted to stop, and rebounding.

[0008] Preferably, the reciprocating component is a button. The button is provided with a hollow tube, and an axial slot is provided on the wall of the hollow tube. When the button moves up and down axially, a certain end face at the upper and lower ends of the slot toggles the special-shaped gear, or the special-shaped gear catches a certain end face at the upper and lower ends of the slot to fix the button.

[0009] Preferably, the special-shaped gear is fixedly arranged, and the hollow tube of the button is sleeved outside the special-shaped gear; there are two slots at relative positions of the hollow tube: a long button slot and a short button slot; with the rotation axis as the center, the special-shaped gear is provided with two tooth protrusions symmetric about the origin and two tooth recesses symmetric about the origin; a certain end face at the upper and lower ends of the long button slot and the short button slot acts on the tooth protrusion or tooth recess.

[0010] Preferably, a limiting structure is provided at the end of the stroke of the reciprocating component.

[0011] Preferably, the elastic balloon is cylindrical and only has an opening at the lower end; the reciprocating component acts on the top surface of the cylinder.

[0012] Preferably, a rigid limiting structure is provided on the outer side of the cylindrical circumferential surface of the elastic balloon.

[0013] Preferably, a gear seat is also fixed. The gear seat is provided with a gear mounting shaft extending along the main radial direction, and the special-shaped gear is mounted on the gear mounting shaft.

[0014] Preferably, the button and the gear seat are detachably combined into one body.

[0015] In order to achieve the second invention object, the present invention adopts the following technical solution: A cosmetic container with a dropper-type metering pump applies the dropper-type metering pump as described above.

[0016] The beneficial effect of this solution is: By setting a stop position at the end of the stroke of the reciprocating component, the stroke of the reciprocating component can be fixed, so as to convert the fixed stroke of the reciprocating component into a fixed spatial reduction value of the elastic balloon, and finally obtain a fixed liquid extraction amount each time. Description of the Drawings

[0017] Figure 1It is an axial sectional view of the dropping tube type metering pump of the present invention, and also serves as a structural schematic diagram of the cosmetic container with a dropping tube type metering pump of the present invention; Figure 2 It is an axial sectional view of the dropping tube type metering pump of the present invention from another angle; Figure 3 It is an exploded view of the parts of the dropping tube type metering pump of the present invention; Figure 4 It is an exploded view of the parts of the fixed stroke reciprocating mechanism of the dropping tube type metering pump of the present invention; Figure 5 It is an exploded view of the parts of the fixed stroke reciprocating mechanism of the dropping tube type metering pump of the present invention from another perspective; Figure 6 It is a structural schematic diagram of a special-shaped gear; Figures 7 to 11 It is a diagram of the operation steps of the present invention.

[0018] Wherein: 10 button cover, 20 button, 21 button cover mounting groove, 22 button short groove, 23 button long groove, 24 gear seat mating mounting groove, 25 axial limiting step, 26 gear seat mating surface, 30 button limiting member, 40 special-shaped gear, 41 tooth convex, 42 tooth concave, 50 gear seat, 51 gear mounting shaft, 60 elastic balloon, 70 suction pipe mounting flange, 80 inner cover, 90 outer cover, 98 liquid suction pipe, 99 bottle body. Specific embodiments

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] In this solution, except for the gear mounting shaft and the gear seat, the rest of the parts are coaxially installed. Therefore, in the following text, unless otherwise specified, the direction definitions of "axial", "radial" and "circumferential" apply to all parts.

[0021] Embodiment 1 Embodiment 1 is a dropping tube type metering pump applied to the packaging container of a certain liquid cosmetic.

[0022] See Figure 1 、 Figure 2 、 Figure 3As shown in the figure, the dropping-tube type metering pump in this example is designed with a fixed-stroke reciprocating mechanism and an elastic balloon 60. The fixed-stroke reciprocating mechanism includes a reciprocating component, such as the button 20 shown in the figure. Pressing the reciprocating component downward can make the lower end of the reciprocating component touch the elastic balloon 60, causing it to contract. After reaching the end of the movement, the reciprocating component will be restricted to stop. Therefore, the amount of contraction of the elastic balloon 60 caused by the reciprocating component touching it each time when reaching the end of the movement is the same. Then, press the reciprocating component again to make the reciprocating component out of the restricted state, and it will rebound upward to the initial position under the elastic force of the elastic balloon 60. At the same time, the elastic balloon 60 resets elastically, and then a corresponding volume of liquid can be sucked by negative pressure. Press the reciprocating component downward again to start the next cycle of downward movement, restricted stop, and rebound.

[0023] Since the amount of contraction of the elastic balloon 60 caused by pressing the reciprocating component each time is the same, the volume of liquid sucked by negative pressure is also the same each time the elastic balloon 60 resets. By configuring a liquid suction tube 98 on the elastic balloon 60, quantitative liquid extraction is achieved in the dropping-tube type liquid extraction method.

[0024] Embodiment 2 Embodiment 2 is another dropping-tube type metering pump, which is also applied to the packaging container of a certain liquid cosmetic.

[0025] In this embodiment, the fixed-stroke reciprocating mechanism is designed to include a button 20 and a special-shaped gear 40. For the shape of the special-shaped gear 40, see Figure 6As shown in the figure, it includes a body, and a pair of tooth protrusions 41 and a pair of tooth recesses 42 arranged on the body. Taking the rotation center of the special-shaped gear 40 as the center of a circle, the two tooth protrusions 41 are symmetric about the origin, and the two tooth recesses 42 are symmetric about the origin. The axial direction of the rotation axis of the special-shaped gear 40 is the radial direction of the main direction. The button 20 is one kind of the reciprocating motion components mentioned in Embodiment 1. In this example, the upper end of the button 20 is the pressing contact surface, and the body is a hollow tube. A button short slot 22 and a button long slot 23 are provided on the tube wall of the hollow tube, and the length directions of both slots extend vertically. The two slots are arranged opposite to each other in the circumferential position of the hollow tube. The special-shaped gear 40 is fixedly arranged and can only rotate around the rotation center under the action of an external force. When the button 20 moves upward or downward, the upper end surface or the lower end surface of the button short slot 22 or the button long slot 23 will act on the special-shaped gear 40, either driving the special-shaped gear 40 to rotate unidirectionally or being stuck by the special-shaped gear 40 and unable to reset upward. When driving the special-shaped gear 40 to rotate unidirectionally, the button 20 can move from the upper dead center to the lower dead center; when being stuck by the special-shaped gear 40, the button 20 can be kept at the lower dead center; pressing the button 20 again can eliminate the state of being stuck by the special-shaped gear 40, so as to rebound and reset upward under the elastic force of the elastic balloon 60. If the hollow tube is relatively narrow, the button short slot 22 and the button long slot 23 may need to be designed with a through bottom to avoid interfering with the normal rotation of the special-shaped gear 40.

[0026] Preferably, the shape of the special-shaped gear 40 is a hexagon evolved from a rectangle. The two long sides of the rectangle are parallel and symmetric, and there are concave parts on the two short sides of the rectangle. The concave parts form the tooth recesses 42, and the tooth recesses 42 have two side edges, and each side edge forms a tooth protrusion 41 with the adjacent long side of the rectangle.

[0027] It should be reminded that the specific angles and dimensions of the special-shaped gear 40 should be designed in combination with the overall mating parts and accurately calculated to meet the action requirements.

[0028] The rest is the same as Embodiment 1.

[0029] Embodiment 3 Embodiment 3 is another dropper-type metering pump, which is applied to the packaging container of a certain external liquid medicine.

[0030] See Figure 4 、 Figure 5As shown, in this embodiment, in order to assemble the special-shaped gear 40, a gear seat 50 is specially fixedly arranged. In this example, the hollow tube of the button 20 is relatively narrow, and the gear seat 50 is designed to be arc-shaped and non-contactingly surround the outside of the hollow tube. A gear mounting shaft 51 horizontally protrudes from the inner arc surface of the gear seat 50, and the axial direction of the gear mounting shaft 51 is exactly the main radial direction of the overall direction. Corresponding limits are provided on the gear mounting shaft 51, and the special-shaped gear 40 is sleeved on the gear mounting shaft 51 and can only rotate around the gear mounting shaft 51 and cannot displace axially along the gear mounting shaft 51.

[0031] In order to cooperate with the gear seat 50, a gear seat fitting installation groove 24 is also provided in the hollow tube of the button 20. The gear seat fitting installation groove 24 penetrates the tube wall of the hollow tube and has an opening at the lower end so as to accommodate the gear mounting shaft 51 in the gear seat fitting installation groove 24 and ensure that the two do not interfere with each other when the button 20 moves up and down.

[0032] The rest is the same as in Embodiment 2.

[0033] Embodiment 4 Embodiment 4 is another dropper-type metering pump applied to the packaging container of a certain biological reagent.

[0034] See Figure 4 、 Figure 5 As shown, in this embodiment, the button 20 is further optimized. First, an axial limit step 25 is designed on the side wall of the button 20, so that the outer side surface of the hollow tube is in the shape of a stepped tube that is larger at the bottom and smaller at the top, and a corresponding limit part is provided in cooperation. The purpose is to provide a certain protection for the button 20 after it rebounds; second, an inwardly concave arc shape is designed on the side wall of the button 20, and the two end faces of the arc shape are gear seat fitting surfaces 26. The gear seat 50 is designed to have the same size as the inwardly concave arc shape on the side wall of the button 20, so that a complete stepped tube structure is formed after the gear seat 50 and the hollow tube of the button 20 are joined together. When the button 20 moves downward, the gear seat 50 can also form a circumferential limit for the button 20 to prevent the button 20 from rotating meaninglessly.

[0035] The rest is the same as in Embodiment 3.

[0036] Embodiment 5 Embodiment 5 is another dropper-type metering pump applied to the packaging container of a certain chemical reagent and biological reagent.

[0037] Embodiment 5 optimizes the elastic balloon 60. First is the shape. See Figure 1 、 Figure 2As shown, the traditional elastic balloon 60 relies on being pinched by the user's hand, and its position, area size, and depth cannot be precisely controlled. In this embodiment, the elastic balloon 60 is made of silicone rubber with uniform thickness, resistant to acids and alkalis, corrosion-resistant, and not sensitive to temperature changes. In this embodiment, the shape of the elastic balloon 60 is a cylinder, with a flat top surface that contacts the lower end surface of the button 20, and an open bottom surface for connecting parts such as the liquid suction tube 98. The uniform wall thickness and cylindrical shape enable the elastic balloon 60 to deform uniformly after being pressed at the top, without tilting to one side or having uneven compression amounts, etc.

[0038] Since the main body part of the button 20 is a hollow tube, the lower end surface is an annular surface. To ensure a good contact effect, a positioning convex point that protrudes upward is provided at the center of the top surface of the elastic balloon 60, and the annular surface of the hollow tube just surrounds the periphery of the positioning convex point, ensuring that the button 20 and the elastic balloon 60 do not shift during the compression and rebound processes. Such a design helps to ensure that the compression amount of the elastic balloon 60 is the same each time it is compressed.

[0039] The rest is the same as in Embodiment 4.

[0040] Embodiment 6 Embodiment 6 is another dropper-type metering pump, which is applied to the packaging container of a certain chemical reagent.

[0041] See Figure 1 、 Figure 2 As shown, in this example, a rigid limiting ring is also fixed on the outer side of the cylindrical outer surface of the elastic balloon 60, and the height of the limiting ring can be adapted to the height of the cylindrical outer surface of the elastic balloon 60. This design is to further limit the deformation of the side wall of the cylinder of the elastic balloon 60, strive to reserve the main deformation amount for the top surface, can further increase the linear correspondence between the downward stroke of the button 20 and the deformation of the elastic balloon 60, and also facilitate concentrating the elasticity of the elastic balloon 60 and facilitating the rebound reset of the button 20.

[0042] The rest is the same as in Embodiment 5.

[0043] Embodiment 7 Embodiment 7 is another dropper-type metering pump, which is applied to the packaging container of a certain liquid cosmetic.

[0044] See Figure 1 、 Figure 2 、 Figure 3 As shown, this embodiment includes a button cover 10, a fixed-stroke reciprocating mechanism, a button limiting member 30, an elastic balloon 60, a straw mounting flange 70, an inner cover 80, an outer cover 90, and a liquid suction tube 98. Among them, the fixed-stroke reciprocating mechanism further includes a button 20, a special-shaped gear 40, and a gear seat 50.

[0045] Specifically, for the combined structure of the button 20, the special-shaped gear 40, and the gear seat 50, refer to the introduction in Embodiment 4, and for the elastic balloon 60, refer to the introduction in Embodiment 6.

[0046] In this example, the button 20 is connected to the button cover 10 through a snap-fit structure. The button cover 10 is located above the button 20 and is the part that is touched by the user's finger when pressing. Reasonable designs can be made for the material, shape, and color of the button cover 10.

[0047] The inner cover 80 of this example is a threaded cover used to screw onto the bottle body 99. Those skilled in the art can also design the opening and closing method of the inner cover 80 and the bottle body 99 according to needs. The inner cover 80 is provided with a through hole, and a straw mounting flange 70 is installed at the through hole.

[0048] For the specific structure of the straw mounting flange 70, please refer to the "Straw Mounting Flange" disclosed in Chinese Patent CN213621248U on July 6, 2021. The straw mounting flange 70 is used to connect the inner cover 80 and the liquid suction tube 98. On the premise of ensuring sealing, those skilled in the art can select other structures according to needs to realize the connection between the inner cover 80 and the liquid suction tube 98.

[0049] The upper end of the liquid suction tube 98 of this example is fixed through the straw mounting flange 70, and the opening is located above the inner cover 80, while the lower end extends downward, and the lower end opening will extend into the liquid level in the bottle body 99. There are various choices for the material of the liquid suction tube 98. It can be glass or plastic, but it is usually preferably chemically stable. For example, Chinese Patents CN118239123A and CN118239122A also disclose liquid suction tubes made of PP material. The liquid suction tube 98 of this example is a glass tube, and a flanging is provided at the upper end opening, which can be fixed to the straw mounting flange 70.

[0050] The elastic balloon 60 is buckled above the inner cover 80. The cylindrical side wall of the elastic balloon 60 is also provided with a step that is larger at the bottom and smaller at the top. The side wall of the inner cover 80 also corresponds to a step that is larger at the bottom and smaller at the top. The step of the elastic balloon 60 just fits onto the step of the inner cover 80 to form a seal, so that the opening below the elastic balloon 60 can only communicate with the liquid suction tube 98.

[0051] The outer cover 90 of this example is not only a decorative part but also a functional part. A plurality of axially extending mounting stripes are provided on the outer side wall of the inner cover 80. The outer cover 90 is tightly sleeved outside the inner cover 80, and the two are fixed in the circumferential direction. A convex ring is provided below the outer edge of the side wall of the inner cover 80, and a groove is provided at the corresponding position on the inner edge of the side wall of the outer cover 9. The convex ring and the groove are matched to form a snap-fit structure, so that the outer cover 90 and the inner cover 80 are fixed in the axial direction.

[0052] The main body of the outer cover 90 is cylindrical in shape, with a diaphragm in the middle part along the axial direction. The fixed-stroke reciprocating mechanism is located above the diaphragm, and the elastic balloon 60 is located below the diaphragm. There is a through-hole in the middle of the diaphragm for the button 20 to pass through when it moves downward. The lower end face of the diaphragm is closely attached to the upper end face of the elastic balloon 60 in the normal state.

[0053] Below the diaphragm, there is a downward-extending lower limit ring of the outer cover. Its function is as described in Embodiment 6, which is to further limit the deformation of the cylindrical side wall of the elastic balloon 60. At the same time, the lower edge of the lower limit ring of the outer cover presses on the stepped surface of the cylindrical side wall of the elastic balloon 60 to ensure the sealing effect between the steps of the elastic balloon 60 and the steps of the inner cover 80.

[0054] Above the diaphragm, there is also an upward-extending upper limit ring of the outer cover, and the fixed-stroke reciprocating mechanism is arranged within this limit ring. A button limiting member 30 is sleeved at the upper end face of the upper limit ring of the outer cover.

[0055] The button limiting member 30 is an annular member, and its main body part is installed in the upper limit ring of the outer cover in a clamping form. The upper end face of the button limiting member 30 is used to limit the downward movement of the button cover 10. The lower end face of the button limiting member 30 not only limits the axial limiting step 25 on the button 20, but also presses on the gear seat 50 to fix the gear seat 50 between the upper end face of the diaphragm and the lower end face of the button limiting member 30, so that the gear seat 50 remains fixed in position when the button 20 moves up and down, and at the same time, it can also ensure that the cooperation of the main parts of the fixed-stroke reciprocating mechanism: the button 20, the gear seat 50, and the special-shaped gear 40 will not become loose and ineffective.

[0056] In this embodiment, except that the elastic balloon 60 and the straw mounting flange 70 are made of elastic silicone rubber material and the liquid suction pipe 98 is made of glass material, the rest are made of materials such as PP and PE, and have normal physical and chemical properties under normal environmental conditions and normal use states. Those skilled in the art can select appropriate materials to manufacture corresponding parts according to actual needs.

[0057] The rest is the same as Embodiment 6.

[0058] The following introduces the operation process of this embodiment: Step 1, as Figure 2 shown, the button 20 is in the initial position above, and the two tooth recesses 42 of the special-shaped gear 40 are located directly above and below, and the four tooth protrusions 41 are located in the upper left, lower left, upper right, and lower right respectively; Step 2, as Figure 7As shown in the figure, press down the button cover 10, driving the button 20 to move downward. When the button 20 moves downward, the upper end surface of the long button slot 23 on the right side of the figure touches the tooth convex 41 in the upper right from top to bottom, driving the special-shaped gear 40 to rotate clockwise until the button 20 moves downward to the bottom, compressing the elastic balloon 60, and the air in the elastic balloon 60 is discharged from the liquid suction pipe 98. At this time, the lower end surface of the short button slot 22 moves downward to below the tooth convex 41 in the lower left; Step 3, as shown in Figure 8, release the button cover 10. The button 20 will rebound upward under the elastic force of the elastic balloon 60. At this time, the lower end surface of the short button slot 22 on the left side of the figure pushes the tooth convex 41 in the lower left, causing the special-shaped gear 40 to rotate clockwise by a certain angle. When it rotates to the preset position, the original tooth convex 41 in the lower left reaches the upper left position, the original tooth convex 41 in the lower right reaches the lower left position, the original tooth concave 42 below reaches the left side, with the opening facing downward and to the left. The lower end surface of the short button slot 22 is stuck by the tooth concave 42 on the left, and the button 20 cannot rebound upward, thus stopping at the current position; Step 4, as shown in Figure 9 the figure, press down the button cover 10 again, driving the button 20 to move downward. At this time, the side wall where the lower end surface of the short button slot 22 is located drives the special-shaped gear 40 to rotate counterclockwise slightly, and the stuck state between the button 20 and the tooth concave 42 on the left is released. The lower end surface of the short button slot 22 moves downward to below the tooth convex 41 in the lower left again; Step 5, as shown in Figure 10 the figure, release the button cover 10. The button 20 rebounds upward again under the elastic force of the elastic balloon 60. The lower end surface of the short button slot 22 pushes the tooth convex 41 in the lower left from bottom to top, driving the special-shaped gear 40 to continue rotating clockwise by a certain angle, so that the tooth concave 42 on the left rotates to the position where the opening faces upward and to the left, and no longer sticks to the lower end surface of the short button slot 22; Step 6, as shown in Figure 11 the figure, the button 20 smoothly rebounds upward to the initial position at the top. The special-shaped gear 40 is also driven by the tube wall of the hollow tube of the button 20 to rotate by a certain angle at the same time. At this time, the rotation position of the special-shaped gear 40 is 180° of the initial position, but still two tooth concaves 42 are located directly above and below, and the four tooth convexes 41 are located in the upper left, lower left, upper right and lower right respectively, which is the same as the initial position. Losing the pressure of the button 20, the elastic balloon 60 rebounds to restore the space inside the balloon, transferring the negative pressure to the liquid suction pipe 98, and a liquid extraction process is completed.

[0059] Since the special-shaped gear 40 is designed with origin symmetry, no adjustment is required, and the next round of liquid extraction can be carried out.

[0060] Example 8 Example 8 is a cosmetic container that applies the dropper type metering pump in Example 7.

[0061] SeeFigure 1 , Figure 2 As shown, the cosmetic container of this example includes a bottle body 99 in addition to the dropper-type quantitative pump described in Example 7. The bottle body 99 of this example is a glass bottle, which is cylindrical as a whole. The bottom of the outer wall of the cylinder is provided with a conical surface that is larger at the top and smaller at the bottom. The bottle mouth is a threaded mouth so as to be screwed and sealed with the inner cover 80. The lower end opening of the liquid pipette 98 extends into the bottle body 99 and is submerged below the liquid surface. Those skilled in the art can also select different materials, different shapes, and design different outer surface visual effects according to actual needs.

[0062] It should be noted that the sealing between the bottle body 99 and the inner cover 80 is not a necessary condition, and even whether the bottle body 99 itself is sealed is not a necessary condition for implementing this solution. However, the pipette 98 and the elastic balloon 60 must be sealed together, leaving only the lower end of the pipette 98 open, otherwise it will lead to a lack of negative pressure, affecting the pipetting effect, or even complete failure.

[0063] In summary, the advantages of the dropper-type metering pump of this solution are: by setting a stop position at the end of the stroke of the reciprocating component, the stroke of the reciprocating component can be fixed, thereby converting the fixed stroke of the reciprocating component into a fixed spatial decrement value of the elastic balloon, and finally obtaining a fixed amount of liquid taken each time. At the same time, since no spring is used in this solution, the button 20 is laterally toggled on the special-shaped gear 40, and the button 20 only contacts the upper surface of the elastic balloon 60 from the front, so there is almost no sound when the parts contact each other during movement, which is very quiet, so the cheap feeling of "click, click" in the traditional structure is eliminated, which is very helpful in shaping the high-end image of the product.

Claims

1. A dropper-type metering pump, comprising an elastic balloon (60), characterized in that: It also includes a fixed-stroke reciprocating mechanism; The fixed stroke reciprocating mechanism includes a reciprocating motion component; the reciprocating motion component can be limited and stopped at the end of the stroke; The reciprocating component acts on the elastic balloon (60) through a fixed stroke, so that the amount of spatial compression is equal each time.

2. A dropper-type metering pump according to claim 1, characterized in that: The fixed-stroke reciprocating mechanism further comprises a special-shaped gear (40); the reciprocating component drives the special-shaped gear (40) to rotate, and when the special-shaped gear (40) is at different rotation angles, the reciprocating component is in a cycle of descending, limited stopping, and rebounding in sequence.

3. A dropper-type metering pump according to claim 2, characterized in that: The reciprocating component is a button (20), which is provided with a hollow tube, and an axial slot is provided on the wall of the hollow tube; when the button (20) moves up and down in the axial direction, a certain end surface of the upper and lower ends of the slot moves the special-shaped gear (4), or the special-shaped gear (40) clamps a certain end surface of the upper and lower ends of the slot to fix the button (20).

4. A dropper-type metering pump according to claim 3, characterized in that: The special-shaped gear (40) is fixedly arranged, and the hollow tube sleeve of the button (20) is arranged outside the special-shaped gear (40); the hollow tube has two slots at relative positions: a button long slot (23) and a button short slot (22); with the rotation axis as the center of the circle, the special-shaped gear (4) is provided with two tooth protrusions (41) and two tooth recesses (42) symmetrical at the origin; and one end surface of the upper and lower ends of the button long slot (23) and the button short slot (22) interacts with the tooth protrusion (41) or the tooth recess (42).

5. A dropper-type metering pump according to claim 1, 2, 3 or 4, characterized in that: A limit structure is provided at the end point of the stroke of the reciprocating motion component.

6. A dropper-type metering pump according to claim 1, 2, 3 or 4, characterized in that: The elastic balloon (60) is cylindrical, with only the lower end being open; the reciprocating motion component acts on the top surface of the cylinder.

7. A dropper-type metering pump according to claim 6, characterized in that: A rigid limiting structure is provided on the outer side of the cylindrical circumferential surface of the elastic balloon (60).

8. A dropper-type metering pump according to claim 2, 3 or 4, characterized in that: A gear seat (50) is also fixed thereto. The gear seat (50) is provided with a gear mounting shaft (51) extending along a main radial direction. The special-shaped gear (4) is mounted on the gear mounting shaft (51).

9. A dropper-type metering pump according to claim 8, characterized in that: The button (20) and the gear seat (50) are detachably assembled into one body.

10. A cosmetic container with a dropper-type metering pump, characterized in that: The dropper-type metering pump as claimed in claim 1 is used.

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