Self-suction dropper

Abstract

The self-suction dropper comprises a middle section, a rubber ring, a suction pipe, a spring A, a piston, a spring B, a head cap and an outer cover, the middle section comprises an inner cylinder part and an outer cylinder part, the rubber ring is installed in an inner cavity of the middle section in a sealed mode, the suction pipe is inserted into the lower portion of the rubber ring, the inner cylinder part is communicated with the rubber ring and the suction pipe, and the piston is installed in an inner cavity of the inner cylinder part. The spring A is arranged in an inner cavity of the inner cylinder part and abuts against the position between the piston and the inner cylinder part, the inner cylinder part is sleeved with the spring B, the head cap covers the middle section, the head cap is vertically connected with the piston, the head cap is in axial sliding connection with the outer cylinder part and is in circumferential limiting connection with the outer cylinder part, and the spring B covers an inner cavity of the head cap and abuts against the position between the top of the head cap and the middle section. An outer cover is sleeved outside the middle section and the head cap, the outer cover is circumferentially and rotatably arranged relative to the middle section, and the outer cover rotates to push the head cap and the piston to do downward linear motion, so that the spring A and the spring B are compressed. According to the automatic quantitative liquid taking device, automatic quantitative liquid taking can be achieved, and the problems of leakage and deterioration of liquid cosmetics such as essential oil and essence can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cosmetic packing technical field more specifically, relate to a self-suction dropper. BACKGROUND

[0002] Liquid cosmetics such as essential oil, essence, etc. are usually stored in sealed glass bottles, and a small amount is taken out as needed. The rubber head dropper bottle is the most conventional packaging bottle for liquid cosmetics such as essential oil, essence, etc. The rubber head is squeezed to suck the material, then the dropper is pulled out, and the material is squeezed out by squeezing the dropper for use. However, this packaging bottle cannot accurately control the amount of cosmetic suction, and too much suction can easily cause waste, and the use experience is poor. SUMMARY

[0003] The utility model aims at overcoming the insufficient of prior art, provide a self-suction dropper, can realize automatic quantitative liquid taking, and can effectively avoid the leakage and metamorphic problem of liquid cosmetics such as essential oil, essence, etc.

[0004] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A self-suction dropper, comprising a middle section, a rubber ring, a suction tube, a spring A, a piston, a spring B, a head cap and an outer cover, the middle section comprises an inner cylinder portion and an outer cylinder portion arranged concentrically, the rubber ring is sealingly installed in the inner cavity of the middle section, the lower part of the rubber ring is inserted with the suction tube, the inner cylinder portion is communicated with the rubber ring and the suction tube, the inner cavity of the inner cylinder portion is installed with the piston in interference fit, the spring A is arranged in the inner cavity of the inner cylinder portion and abuts between the piston and the bottom of the inner cylinder portion, the spring B is sleeved on the outer portion of the inner cylinder portion, the head cap is arranged on the middle section, and the head cap is connected with the piston in up and down, the head cap is connected with the outer cylinder portion in axial sliding and circumferential limiting, the spring B is arranged in the inner cavity of the head cap and abuts between the top of the head cap and the middle section, the middle section and the head cap are sleeved with the outer cover, the outer cover is arranged in circumferential rotation relative to the middle section, the rotation of the outer cover can drive the head cap and the piston to move linearly downward, and then the spring A and the spring B are compressed.

[0006] Further, the piston is made of nitrile rubber injection molding structure.

[0007] Further, the middle section is made of polybutylene terephthalate injection molding structure.

[0008] Further, the middle section further comprises a ring-shaped connecting portion for connecting the lower end of the inner cylinder portion and the middle portion of the outer cylinder portion, the rubber ring passes through the bottom of the inner cylinder portion and is sealingly and limitingly connected on the inner cylinder portion in up and down, the connecting portion is sealingly and closely fitted with the middle portion of the rubber ring in up and down; the inner wall of the outer cylinder portion below the connecting portion is provided with internal threads.

[0009] Furthermore, the headgear includes a main headgear portion and an inner column portion disposed within the inner cavity of the main headgear portion. The lower part of the inner column portion is connected to a piston, and the main headgear portion is axially slidably connected to the outer cylinder portion and circumferentially limited.

[0010] Furthermore, the lower outer wall of the main cap is provided with circumferentially distributed teeth, and the upper part of the outer cylinder is provided with circumferentially distributed through grooves. The teeth are inserted into the through grooves one by one and can move up and down along the through grooves.

[0011] Furthermore, the lower outer wall of the outer cylinder is provided with convex teeth distributed circumferentially, and the inner wall of the outer cover is provided with grooves distributed circumferentially. The convex teeth are matched one-to-one with the grooves and can slide circumferentially within the grooves.

[0012] Furthermore, the lower outer wall of the outer cylinder is circumferentially distributed with axially protruding ribs, and the inner wall of the outer cover is circumferentially distributed with grooves. The grooves and slots are circumferentially staggered. The grooves are provided with axially protruding ribs, which divide the grooves into a first groove and a second groove. When spring A and spring B are in their initial natural state, the protruding ribs abut against the side wall of the first groove away from the second groove. In the circumferential direction from the second groove to the first groove, the protruding teeth abut against the end of the slot away from the first groove. When the outer cover rotates relative to the middle section and pushes the head cap down to the lower end, the outer cover rotates until the protruding ribs are engaged in the second groove.

[0013] Furthermore, the upper inner wall of the outer cover has downward-opening guide grooves distributed circumferentially, and the lower outer wall of the main cap has axial guide ribs distributed circumferentially. Initially, the guide ribs are inserted into the guide grooves one by one. When the outer cover rotates relative to the middle section, the guide grooves push the guide ribs, causing the cap to be guided to move downward in a straight line.

[0014] Furthermore, the upper end face of the outer cylinder is recessed to form a notch, and the lower part of the guide rib is embedded in the notch and can move up and down along the notch.

[0015] The beneficial effects of this utility model are:

[0016] This device employs a nitrile rubber piston and a PBT middle section, utilizing a dual-spring rotary automatic pump design to achieve automatic quantitative dispensing of liquid cosmetics. It solves the cosmetic leakage problem inherent in existing rotary self-priming droppers that rely on a single external spring for rebound (while there are currently rotary self-priming droppers on the market, most use only one external spring for rebound, such as the dropper dispenser described in patent CN210299950U. Because it relies on only one external spring, the pressing cap is prone to tilting during rebound, increasing friction between the piston and the pump sleeve, leading to piston wear and cosmetic leakage after a period of use). The device is simple and reliable to operate, provides a superior user experience, and effectively prevents leakage and spoilage of liquid cosmetics such as essential oils and serums. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a first perspective view of the self-suction dropper of the present embodiment;

[0018] Figure 2 is a second perspective view of the self-suction dropper of the present embodiment; Figure 1 is a cross-sectional view along the direction of A-A;

[0019] Figure 3 is a cross-sectional view along the direction of B-B; Figure 1

[0020] Figure 4 is a second perspective view of the self-suction dropper of the present embodiment;

[0021] Figure 5 is a cross-sectional view along the direction of C-C; Figure 4

[0022] is a perspective view of the middle section of the present embodiment; Figure 6

[0023] is a perspective view of the head cap of the present embodiment; Figure 7

[0024] is a perspective view of the connection between the middle section and the head cap of the present embodiment; Figure 8

[0025] is a top perspective view of the outer cover of the present embodiment; Figure 9

[0026] is a bottom perspective view of the outer cover of the present embodiment; Figure 10

[0027] is a structural view of the self-suction dropper after the head cap of the present embodiment is moved downward; Figure 11

[0028] is a cross-sectional view along the direction of D-D. Figure 12 Figure 11 In the figure: middle section 1, inner cylinder part 11, convex ring 111, outer cylinder part 12, through groove 121, notched groove 122, convex tooth 123, convex rib 124, inner thread 125, connecting part 13, rubber ring 2, annular groove 21, suction tube 3, spring A 4, piston 5, spring B 6, head cap 7, main cap part 71, clamping tooth 711, guide rib 712, inner column part 72, outer cover 8, guide groove 81, first groove wall 811, second groove wall 812, third groove wall 813, clamping groove 82, recess 83, first groove 831, second groove 832, convex rib 84.

[0029] DETAILED DESCRIPTION

[0030] ​​​The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0031] As shown in Figures 1-11 , a self-suction dropper comprises a middle section 1, a rubber ring 2, a suction pipe 3, a spring A 4, a piston 5, a spring B 6, a head cap 7 and an outer cover 8. The middle section 1 is a structure made of polybutylene terephthalate injection molding. PBT material is not easy to react with liquid cosmetics such as essential oils. The middle section can be avoided from reacting with cosmetics and deteriorating. The rubber ring 2 is made of butadiene-acrylonitrile rubber injection molding. The suction pipe 3 is a glass tube. The piston 5 is a structure made of butadiene-acrylonitrile rubber injection molding. Butadiene-acrylonitrile rubber has better wear resistance than the commonly used piston materials PE and PP, which helps to avoid piston wear. The head cap 7 is made of ABS injection molding. The outer cover 8 is made of ABS injection molding.

[0032] As shown in Figure 1 , Figure 4 , the middle section 1 comprises an inner cylinder part 11 and an outer cylinder part 12 arranged concentrically inside and outside, and the rubber ring 2 is sealingly installed in the inner cavity of the middle section 1. Specifically, the middle section 1 further comprises a ring-shaped connecting part 13 for connecting the lower end of the inner cylinder part 11 and the middle part of the outer cylinder part 12. The rubber ring 2 passes through the bottom of the inner cylinder part 11 and is sealingly clamped on the inner cylinder part 11. The connecting part 13 is sealingly attached to the upper and lower parts of the rubber ring 2. Further, the axial section of the inner cylinder part 11 is U-shaped, the upper part of the rubber ring 2 is provided with a ring-shaped annular groove 21, and the upper part of the rubber ring 2 passes through the bottom of the inner cylinder part 11 and the bottom of the inner cylinder part 11 is clamped into the annular groove 21.

[0033] The lower part of the rubber ring 2 is inserted with the suction pipe 3, and the inner cylinder part 11 communicates with the rubber ring 2 and the suction pipe 3. The piston 5 is installed in the inner cavity of the inner cylinder part 11 in interference fit. The spring A 4 is arranged in the inner cavity of the inner cylinder part 11 and abuts between the piston 5 and the bottom of the inner cylinder part 11. As shown in Figure 1 , a convex ring 111 is arranged on the inner wall of the upper end of the inner cylinder part 11, which can limit the upward movement of the piston 5 and prevent the piston 5 from coming out of the inner cylinder part 11.

[0034] As shown in Figure 1 , Figure 4 , the spring B 6 is sleeved outside the inner cylinder part 11, the head cap 7 is arranged on the middle section 1, and the head cap 7 is connected to the piston 5 in an upper and lower manner, the head cap 7 is axially and circumferentially connected to the outer cylinder part 12, and the spring B 6 is arranged in the inner cavity of the head cap 7 and abuts between the top of the head cap 7 and the middle section 1. Specifically, as shown in Figure 1 ,Figure 7 As shown, the head cap 7 comprises a main cap portion 71 and an inner column portion 72 arranged in the inner cavity of the main cap portion 71, the axial section of the main cap portion 71 is inverted U-shaped; the lower part of the inner column portion 72 is connected with the piston 5, and the inner column portion 72 is tightly sleeved or buckled with the piston 5; the main cap portion 71 is axially slidably connected with the outer cylinder portion 12 and circumferentially limitedly connected with the outer cylinder portion 12. Further, as shown in Figure 8 As shown, the outer wall of the lower part of the main cap portion 71 is circumferentially distributed with the clamping teeth 711, the upper part of the outer cylinder portion 12 is provided with the circumferentially distributed through grooves 121, the clamping teeth 711 are one-to-one correspondingly inserted into the through grooves 121 and can move up and down along the through grooves 121, thereby realizing the axial sliding connection and circumferential limiting connection of the head cap 7 with the outer cylinder portion 12, and ensuring the stability of the movement of the head cap 7.

[0035] The outer sleeve of the middle section 1 and the head cap 7 is provided with an outer cover 8, and the outer cover 8 is arranged to rotate relative to the middle section 1. Further, as shown in Figure 1 、 Figure 5 、 Figure 6 、 Figure 10 As shown, the outer wall of the lower part of the outer cylinder portion 12 is circumferentially distributed with the protruding teeth 123, the inner wall of the outer cover 8 is circumferentially distributed with the clamping grooves 82, and the protruding teeth 123 are one-to-one correspondingly inserted into the clamping grooves 82 and can circumferentially slide in the clamping grooves 82. The outer wall of the lower part of the outer cylinder portion 12 is circumferentially distributed with the axial protruding ribs 124, the inner wall of the outer cover 8 is circumferentially distributed with the recess grooves 83, the recess grooves 83 are circumferentially staggered with the clamping grooves 82, the recess grooves 83 are provided with the axial protruding ribs 84, the protruding ribs 84 divide the recess grooves 83 into the first grooves 831 and the second grooves 832, see Figure 8 ; when the spring A4 and the spring B6 are in the initial natural state, the protruding ribs 124 abut the groove side wall of the first grooves 831 away from the second grooves 832; and in the circumferential direction from the second grooves 832 to the first grooves 831, the protruding teeth 123 abut the end of the clamping grooves 82 away from the first grooves 831, see Figure 3 、 Figure 5 .

[0036] The rotation of the outer cover 8 can push the head cap 7 and the piston 5 to move linearly downward, thereby compressing the spring A4 and the spring B6, see Figure 10 . Further, the inner wall of the upper part of the outer cover 8 is circumferentially distributed with the downward opening guide grooves 81, see Figure 9 , the outer wall of the lower part of the main cap portion 71 is circumferentially distributed with the axial guide ribs 712, and initially the guide ribs 712 are one-to-one correspondingly inserted into the guide grooves 81, see Figure 1 、 Figure 2 When the outer cover 8 rotates relative to the middle section 1, the guide ribs 712 are pushed by the guide grooves 81 to guide the head cap 7 to move linearly downward. As shown in Figure 9As shown, the guide slot 81 is in a ladder-like structure with the short side on top, and the guide slot 81 includes a vertical first slot wall 811, an inclined third slot wall 813, and a second slot wall 812 connecting the first slot wall 811 and the third slot wall 813, the third slot wall 813 is inclined downward and away from the first slot wall 811, and the upper end of the guide rib 712 initially abuts the second slot wall 812 and the first slot wall 811, and when the outer cover 8 is rotated to push the guide rib 712 to slide along the third slot wall 813 and be pushed downward.

[0037] When the outer cover 8 is rotated relative to the middle section 1 to push the head cap 7 downward to the lower end, the outer cover 8 is rotated to the convex rib 124 being clamped into the second slot 832, at this time, through the clamping action of the convex rib 124 and the second slot 832, the head cap 7 is limited, so that the spring A4 and the spring B6 maintain a stable compression state.

[0038] As shown in Figure 6 , Figure 8 , the upper end of the outer cylinder portion 12 is recessed to form a notch slot 122, and the lower part of the guide rib 712 is embedded in the notch slot 122 and can move up and down along the notch slot 122.

[0039] As shown in Figure 1 , Figure 11 , the inner wall of the outer cylinder portion 12 below the connecting portion 13 is provided with an internal thread 125, which can be screwed with the bottle.

[0040] When the self-suction dropper of the embodiment is screwed to the bottle, the middle section 1 is first screwed and fixed with the bottle, and with further screwing of the outer cover 8, the outer cover 8 is relatively rotated with the middle section 1, the convex rib 84 passes through the convex rib 124 and is rotated to the convex rib 124 being clamped into the second slot 832, in the circumferential direction from the second slot 832 to the first slot 831, the convex tooth 123 is changed from abutting the end of the clamping slot 82 away from the first slot 831 to abutting the end of the clamping slot 82 close to the first slot 831, and in this process, due to the circumferential limiting and axial guiding effects of the through slot 121 and the notch slot 122, the rotation of the outer cover 8 pushes the guide rib 712 downward through the third slot wall 813, realizing the axial linear downward movement of the head cap 7, the upper end of the guide rib 712 moves downward to abut the lower end of the third slot wall 813, the downward movement of the head cap 7 pushes the piston 5 downward, and the spring A4 and the spring B6 are compressed, the piston 5 discharges the air in the inner cylinder portion 11, see Figure 11 , Figure 12When the cosmetic is used, the outer cover 8 is twisted off, the outer cover 8 is firstly relatively rotated with the middle section 1, the convex rib 84 passes the convex rib 124 until the convex rib 124 abuts the slot side wall of the first slot 831, and the convex tooth 123 is changed from abutting the end of the clamping slot 82 close to the first slot 831 to abutting the end of the clamping slot 82 far from the first slot 831, in the process, the spring A 4 and the spring B 6 rebound to push the piston 5 and the head cap 7 to move up to the initial state, the piston 5 moves up to make the inner cavity of the inner cylinder part 11 negative pressure to generate suction to suck liquid. After the piston 5 and the head cap 7 completely recover to the initial state, the outer cover 8 is continuously rotated to drive the middle section 1 to rotate, the middle section 1 drives the head cap 7 to rotate, so that the self-suction dropper is completely separated from the bottle, and the self-suction dropper is removed; then the head cap 7 is pressed to discharge the cosmetic sucked in the suction pipe 3.

[0041] The preferred embodiments of the present application have been described above, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical scheme falling within the idea of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application can also be considered as the protection scope of the present application.

Claims

1. A self-suction dropper comprising a middle section (1), a rubber ring (2), a suction tube (3), a spring A (4), a piston (5), a spring B (6), a head cap (7) and an outer cover (8), characterized in that, The middle section (1) comprises an inner cylinder part (11) and an outer cylinder part (12) arranged concentrically, the rubber ring (2) is sealingly installed in the inner cavity of the middle section (1), the lower part of the rubber ring (2) is inserted with a suction tube (3), the inner cylinder part (11) is in communication with the rubber ring (2) and the suction tube (3), the inner cylinder part (11) is installed with a piston (5) in the inner cavity by interference fit, the spring A (4) is arranged in the inner cavity of the inner cylinder part (11) and abuts between the piston (5) and the bottom of the inner cylinder part (11), the outer part of the inner cylinder part (11) is sleeved with a spring B (6), the head cap (7) is covered on the middle section (1), and the head cap (7) is connected with the piston (5) up and down, the head cap (7) is axially slidingly connected with the outer cylinder part (12) and circumferentially limitingly connected, the spring B (6) is covered in the inner cavity of the head cap (7) and abuts between the top of the head cap (7) and the middle section (1), the middle section (1) and the head cap (7) are sleeved with an outer cover (8), the outer cover (8) is arranged circumferentially relative to the middle section (1), the outer cover (8) can push the head cap (7) and the piston (5) to move linearly downward, so that the spring A (4) and the spring B (6) are compressed.

2. The self-priming dropper of claim 1, wherein, The piston (5) is a structure made of butyronitrile rubber injection.

3. The self-priming dropper of claim 1, wherein, The middle section (1) is a structure made of polybutylene terephthalate injection.

4. The self-priming dropper of claim 1, wherein, The middle section (1) further comprises a ring-shaped connecting part (13) for connecting the lower end of the inner cylinder part (11) and the middle part of the outer cylinder part (12), the rubber ring (2) passes through the bottom of the inner cylinder part (11) and is sealingly and limitingly clamped on the inner cylinder part (11) up and down, the connecting part (13) is sealingly and closely fitted with the middle part of the rubber ring (2) up and down; the inner wall of the outer cylinder part (12) below the connecting part (13) is provided with an internal thread (125).

5. The self-priming dropper of claim 1, wherein, The head cap (7) comprises a main cap part (71) and an inner column part (72) arranged in the inner cavity of the main cap part (71), the lower part of the inner column part (72) is connected with the piston (5), and the main cap part (71) is axially slidingly connected with the outer cylinder part (12) and circumferentially limitingly connected.

6. The self-priming dropper of claim 5, wherein, The lower part of the outer wall of the main cap part (71) is circumferentially distributed with a clamping tooth (711), the upper part of the outer cylinder part (12) is provided with a circumferentially distributed through slot (121), the clamping tooth (711) is correspondingly inserted into the through slot (121) and can move up and down along the through slot (121).

7. The self-priming dropper of claim 5, wherein, The lower part of the outer wall of the outer cylinder part (12) is circumferentially distributed with a protruding tooth (123), the inner wall of the outer cover (8) is circumferentially distributed with a clamping groove (82), the protruding tooth (123) is correspondingly and fittingly inserted into the clamping groove (82) and can slide circumferentially in the clamping groove (82).

8. The self-priming dropper of claim 7, wherein, The outer cylinder part (12) lower outer wall circumferential distribution has axial convex rib (124), the outer cover (8) inner wall circumferential distribution has recess (83), the recess (83) and the snap groove (82) circumferential staggered distribution, the recess (83) is equipped with axial convex rib (84), the convex rib (84) will recess (83) be divided into first slot (831) and second slot (832);Spring A (4) and spring B (6) are in initial natural state when the convex rib (124) abuts away from the first slot (831) slot side wall of second slot (832);And in the circumferential direction from second slot (832) to first slot (831), the convex tooth (123) abuts to away from the end of the snap groove (82) of first slot (831);When the outer cover (8) is relatively middle section (1) rotates and pushes the head cap (7) to move down to low end, the outer cover (8) rotates to convex rib (124) and is inserted into second slot (832).

9. The self-priming dropper of claim 5, wherein, The outer cover (8) upper inner wall circumferential distribution has the guiding slot (81) of opening downward, the main cap part (71) lower outer wall circumferential distribution has axial guide rib (712), initially the guide rib (712) one-to-one corresponds and is inserted into guiding slot (81), when the outer cover (8) is relatively middle section (1) rotates, the head cap (7) is guided to move down linear motion by guiding slot (81) and push guide rib (712).

10. The self-priming dropper of claim 9, wherein, The outer cylinder part (12) upper end face recess forms notch groove (122), the guide rib (712) lower part is embedded in notch groove (122) and can move up and down along notch groove (122).

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