A leak-proof replacement package and dropper bottle

Abstract

The patent of the present invention discloses a leak-proof liquid replacement package and a dropper bottle, comprising: a bottle body, comprising a main section and a connecting section, a first through cavity is formed in the connecting section, and a second through cavity communicated with the first through cavity is formed in the main section; a sealing structure is fixed inside the second through cavity; a piston; and a plug, the plug extends into the first through cavity, the plug is provided with a third through cavity, and the third through cavity has an installation position for fixing a valve core, wherein: the plug can be locked by a locking structure at one end close to the sealing structure, so that the side of the third through cavity close to the sealing structure abuts against the sealing structure, and the sealing structure seals the third through cavity; the patent is provided with a plug having a third through cavity in the connecting section of the replacement package, and a matching sealing structure is provided, and the first through cavity is sealed by the mutual abutment between the plug and the sealing structure, the operation is simple, and the first through cavity can be opened and sealed when the inside of the dropper bottle is not visible.

Description

Technical Field

[0001] The invention relates to the field of cosmetic containers and dropper bottles, in particular to a leak-proof liquid replacement package and a dropper bottle. Background Art

[0002] A dropper bottle is a container commonly used for holding cosmetics. A single squeeze of the pressing head on the dropper bottle will squeeze out a certain amount of material. In order to ensure that the material discharged each time is the same, in the prior art, a valve core that matches the material holding cavity is used to achieve uniform material discharge. However, in the prior art, dropper bottles with valve cores are often disposable, and the replaceable cosmetic replacement packs currently on the market are not suitable for such replacement packs with valve cores, which may cause problems such as difficulty in installation or material leakage. Therefore, whether there is a dropper bottle with a replacement pack that is easy to disassemble and does not leak during the disassembly and assembly process is a technical problem that technicians in this field are looking forward to solving. Summary of the invention

[0003] The purpose of the present invention is to provide a leak-proof replacement package and a dropper bottle. The replacement package is easy to disassemble and assemble, and no leakage occurs during the disassembly and assembly process, and the sealing is reliable.

[0004] The technical solution provided by the present invention is as follows:

[0005] A leak-proof replacement package that can be sealed and connected to the valve core of a dropper bottle, comprising:

[0006] The bottle body comprises a main body section and a connecting section, wherein a first through cavity is formed in the connecting section, and a second through cavity communicated with the first through cavity is formed in the main body section, and openings are formed at two opposite ends of the main body section and the connecting section, and the second through cavity has a sealing structure inside;

[0007] a piston, located inside the second through cavity and adapted to the second through cavity; and,

[0008] A plug, the plug extends into the first through cavity and is sealed with the inner wall of the connecting section, the plug can move in the first through cavity along its extension direction, the plug is provided with a third through cavity, and the third through cavity has a mounting position for fixing the valve core, wherein:

[0009] The plug and the connecting section are provided with matching locking structures, and the plug can be locked by the locking structure at one end close to the sealing structure so that the side of the third through cavity close to the sealing structure abuts against the sealing structure, and the sealing structure seals the third through cavity.

[0010] When the replacement package is filled with materials, the piston is located at one end of the second through cavity away from the first through cavity, and the locking structure makes the plug abut against the sealing structure to achieve sealing of the second through cavity. A sealed accommodation space for placing cosmetic materials is formed between the sealing structure and the piston, and this space is not connected to the outside world. When the replacement package needs to be replaced, the replacement package is first inserted into the dropper bottle so that the valve core in the dropper bottle is sealed and connected to the third through cavity. Thereafter, the plug overcomes the effect of the locking structure to move outward, and then the valve core, the third through cavity, and the second through cavity are connected. During the replacement process of the replacement package, no leakage of materials will occur, which will not waste materials and can also avoid the problem of air entering the replacement package and causing material deterioration.

[0011] Further preferably, the side of the third through cavity close to the sealing structure is a circular hole, the sealing structure is in the shape of a truncated cone, the axis of the sealing structure overlaps with the axis of the circular hole, the radial dimension of the side of the sealing structure close to the circular hole is smaller than the radial dimension of the circular hole, and the radial dimension of the side of the sealing structure away from the circular hole is larger than the radial dimension of the circular hole.

[0012] As the third through cavity approaches the sealing structure, the inner wall edge of the circular hole will abut against the truncated cone to form a seal. When the plug needs to be sealed or opened multiple times. If after multiple sealings, the radial size of the circular hole changes or an inward annular indentation is pressed on the truncated cone, it is only necessary for the circular hole to further abut against the slightly larger radial size part of the truncated cone to achieve mutual sealing between the circular hole and the truncated cone, realize the repeated use of the plug, and improve the reliability of the plug. In actual production, the third through cavity and the sealing structure can also adopt other sealing contact forms such as face-to-face contact.

[0013] Further preferably, the end of the plug away from the sealing structure has a first stopper, and a second stopper is correspondingly arranged on the connecting section; when the plug is located at one end close to the sealing structure, the first stopper and the second stopper abut against each other to provide a limit in the circumferential direction of the first through cavity.

[0014] The first stopper and the second stopper can take various shapes as long as they meet the requirement that, when one side of the third through cavity abuts against the sealing structure, the stopper and the side surface of the second stopper located in the circumferential direction of the first through cavity abut against each other, so as to provide the user with a stuck feeling when rotating the plug, so that after the replacement pack is installed into the dropper bottle, the user can still accurately grasp the sealing condition of the third through cavity and the sealing structure.

[0015] Further preferably, the first through cavity is divided into a first section and a second section, the locking structure includes an internal thread arranged in the first section and an external thread arranged on the plug, the internal thread is adapted to the external thread, and the second section is interference connected with the plug.

[0016] The first section can be the end of the first through cavity close to the sealing structure, or the end of the first through cavity away from the sealing structure, and correspondingly, the second section is located at the other end of the first through cavity. The locking structure is a threaded structure, which is easy to operate, and the plug can be rotated to seal the second through cavity. The second section and the plug can adopt various interference connection methods, for example, the overall radial dimension of the second section is smaller than the radial dimension of the corresponding part of the plug, and a sealing ring with a radial dimension larger than the radial dimension of the second section can be set on the outer circumference of the plug, and a sealing ring with a radial dimension smaller than the radial dimension of the corresponding part of the plug can also be set on the inner circumference of the second section.

[0017] Another object of the present invention is to provide a replaceable dropper bottle, comprising:

[0018] The tube body has a fourth through cavity inside;

[0019] A valve core is arranged at one end of the fourth through cavity;

[0020] A leak-proof replacement package having the above-mentioned characteristics is arranged in the fourth through cavity, the valve core is detachably sealed and fixed to the plug, and is in communication with the third through cavity; and

[0021] The pressing head is located at one end of the tube body away from the valve core. The pressing head, the tube body and the valve core are fixed in sequence.

[0022] The valve core is used to control the volume of extruded material. The end of the tube body close to the valve core is the material outlet. When the replacement package is fixed into the tube body, the material presses the pressing head, which will cause the pressing head, the replacement package and the valve core to move toward the material outlet. During the process, the valve core draws part of the material from the replacement package and sends it out from the material outlet. The piston moves a certain distance toward the material outlet, and air enters the second through cavity from the pressing head to supplement the space for the piston to move.

[0023] Further preferably, the tube body has a fourth limiting portion inside, and the fourth limiting portion provides limitation for the valve core along the axial direction of the valve core, thereby limiting the stroke of the valve core, which can achieve the technical effect of preventing the valve core from falling out.

[0024] Further preferably, the third through cavity is divided into a third section and a fourth section, the third section is close to the sealing structure, the radial dimension of the fourth section is larger than the radial dimension of the third section, a step surface is formed between the third section and the fourth section, and the valve core passes through the fourth section and is interference connected with the third section.

[0025] The third section is close to the sealing structure, and the fourth section is close to the material outlet. Since the valve core is located inside the bottle body, it is difficult for the user to align the valve core with the third section when inserting the replacement package. The radial dimension of the fourth section is relatively large. During the process of pushing the replacement package into the tube body, the valve core can easily enter the fourth section, and at the same time, under the guidance of the step surface, enter the third section and have an interference connection with the third section. The third section and the valve core can adopt various interference connection methods, for example, the overall radial dimension of the third section is smaller than the radial dimension of the corresponding part of the valve core, or a sealing ring with a radial dimension larger than the radial dimension of the third section can be set on the outer circumference of the valve core, or a sealing ring with a radial dimension smaller than the radial dimension of the corresponding part of the valve core can be set on the inner circumference of the third section.

[0026] Further preferably, an external spline is provided on a side of the plug away from the sealing structure, the external spline is distributed in the circumferential direction of the axis of the third through cavity, and an internal spline is correspondingly provided inside the tube body.

[0027] When the valve core and the plug are fixed, the user cannot directly reach into the pipe body to rotate the plug. After the spline is set, the plug can be rotated relative to the bottle body by fixing the replacement package and rotating the bottle body, or fixing the bottle body and rotating the container, so that the replacement package is opened or sealed. At the same time, the spline can guide the replacement package, making it easier to install the replacement package.

[0028] Further preferably, the replaceable dropper bottle further comprises a bottle cap, which is detachably fixed to the tube body;

[0029] The valve core has a first limiting portion extending toward the periphery;

[0030] The side wall of the tube body has a deformable elastic member, which is adapted to the bottle cap, and the elastic member has a second limiting portion located in the fourth through cavity; wherein,

[0031] When the bottle cap is fixed to the tube body, the bottle cap presses the elastic member so that the first limiting portion and the second limiting portion overlap in the circumferential direction, thereby providing axial limiting for the valve core;

[0032] When the bottle cap is not pressed against the elastic member, the first limiting portion and the second limiting portion are separated from each other in the axial direction.

[0033] The bottle cap and the tube body can be connected by various common methods such as interference connection and threaded structure connection. When the bottle cap is closed, pressure is exerted on the elastic member, and the elastic member will deform toward the inside of the tube body, so that the first limit part abuts against the second limit part, and the valve core cannot move toward the material outlet direction, thereby locking the valve core and further preventing leakage from the dropper bottle.

[0034] It is further preferred that a limiting block is provided on the outer wall of the bottle body on one side away from the sealing structure, and the end of the tube body close to the pressing head has a third limiting portion with a notch, and a third stopper is provided on the side of the third limiting portion close to the fourth through cavity, and the limiting block can enter the fourth through cavity through the notch, and the third stopper is used to provide a limit for the limiting block along the circumferential direction of the bottle body; wherein,

[0035] When the limiting block is located in the fourth through cavity and is misaligned with the notch in the circumferential direction of the third limiting portion, the third limiting portion provides limiting for the limiting block along the axial direction of the tube body.

[0036] When the user inserts the replacement package into the dropper bottle and rotates the replacement package, the limit block will abut against the third limit portion. The third limit portion can achieve a locking effect on the replacement package by limiting the limit block to prevent the replacement package from falling out.

[0037] The third stopper provided on the third limiting portion is used to limit the rotational travel of the replacement assembly, so as to facilitate operation by the user.

[0038] The present patent creatively arranges a plug with a third through-cavity in the connecting section of the replacement package, and arranges a sealing structure matched with the third through-cavity inside the first through-cavity, and seals the first through-cavity by abutting against each other between the plug and the sealing structure. The operation is simple, and the first through-cavity can be opened and sealed without being visible inside the dropper bottle. No leakage will occur during the replacement of the replacement package, and the technical problem of air entering the replacement package and causing material deterioration during the replacement process can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0040] Figure 1 It is a schematic diagram of a plug structure according to a specific embodiment of the present invention;

[0041] Figure 2 It is a schematic diagram of the bottle structure of a specific embodiment of the present invention;

[0042] Figure 3 It is a schematic diagram of the piston structure of a specific embodiment of the present invention;

[0043] Figure 4 It is a schematic structural diagram of a replacement package in an open state according to a specific embodiment of the present invention;

[0044] Figure 5 is a cross-sectional view of a replacement package in an open state according to a specific embodiment of the present invention;

[0045] Figure 6It is a schematic diagram of the sealing structure of a replacement device according to a specific embodiment of the present invention;

[0046] Figure 7 is a cross-sectional view of a sealing state of a replacement device according to a specific embodiment of the present invention;

[0047] Figure 8 It is a schematic diagram of the pipe body structure of a specific embodiment of the present invention;

[0048] Fig. 9 It is a schematic diagram of the valve core structure of a specific implementation mode of the present invention;

[0049] Fig.10 It is a schematic diagram of the pressing head structure of a specific embodiment of the present invention;

[0050] Fig.11 It is a schematic diagram of the bottle cap structure of a specific embodiment of the present invention;

[0051] Fig.12 is a cross-sectional view of a dropper bottle according to a specific embodiment of the present invention;

[0052] Fig.13 This is the enlarged view of point A;

[0053] Fig.14 This is a cross-sectional view of point B when the replacement package is inserted into the bottle body;

[0054] Fig.15 This is a cross-sectional view of point B when the replacement device is locked after being rotated in the bottle body;

[0055] Fig.16 It is a cross-sectional view of a tube body according to a specific embodiment of the present invention.

[0056] Description of Figure Numbers:

[0057] 100-bottle body; 110-main section; 111-second through cavity; 120-connecting section; 121-first through cavity; 122-first section; 123-second section; 124-second stopper; 130-limiting block; 200-sealing structure; 300-piston; 400-plug; 410-third through cavity; 411-round hole; 412-third section; 413-fourth section; 414-step surface; 420-step surface; 42 1-first stopper; 430-external spline; 500-locking structure; 510-internal thread; 520-external thread; 600-tube body; 610-fourth through cavity; 620-internal spline; 630-elastic member; 631-second limiting portion; 640-fourth limiting portion; 650-third limiting portion; 651-notch; 660-third stopper; 700-valve core; 710 first limiting portion; 800-pressing head; 900-bottle cap. DETAILED DESCRIPTION

[0058] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0059] As a specific example, Figure 1-7 As shown, a leak-proof liquid replacement package includes: a bottle body 100, including a main body section 110 and a connecting section 120, a first through cavity 121 is formed in the connecting section 120, the main body section 110 is formed with a second through cavity 111 that is connected to the first through cavity 121, the main body section 110 and the connecting section 120 are provided with openings at opposite ends, the first through cavity 121 is used as a main cavity for accommodating materials, the connecting structure and the second through cavity 111 inside it are used for connecting, the main body section 110 and the connecting section 120 are provided with openings at opposite ends, and the second through cavity 111 is used for connecting. The opening of the through cavity 111 is used to discharge the material, and the opening of the first through cavity 121 is used to allow air to enter; the sealing structure 200 is fixed inside the second through cavity 111, and the radial dimension of the sealing structure 200 is smaller than the second through cavity 111, so that the material can enter the first through cavity 121 from the gap between the sealing structure 200 and the second through cavity 111, and be discharged to the outside of the replacement device; the plug 400, the plug 400 can be partially extended into the first through cavity 121, or can be completely located inside the first through cavity 121, and the plug 400 and the connecting section 120 The plug 400 is sealed and connected to the inner wall of the first through cavity 121, and the plug 400 can move in the extended extension direction in the first through cavity 121. At the same time, the plug 400 itself is provided with a third through cavity 400, and the third through cavity 400 has an installation position for fixing the valve core 700. One end of the third through cavity 400 is connected to the external atmosphere, and the other end can be connected to the second through cavity 111; the plug 400 and the connecting section 120 are provided with a matching locking structure 500, and the plug 400 can be locked by the locking structure 500 at one end close to the sealing structure 200, so that the third through cavity 400 is close to the sealing structure. One side of the structure 200 abuts against the ferry head, and the sealing structure 200 seals the third through cavity 400, that is, the locking structure 500 can exert a force on one or both of the plug 400 and the bottle body 100 along the direction of the first through cavity 121, so that the third through cavity 400 remains against the sealing structure 200. Accordingly, a certain force is required to make the plug 400 separate from the bottle body 100 outward and make the third through cavity 400 connect to the second through cavity 111, so that the material inside the second through cavity 111 can flow out of the third through cavity 400.

[0060] Under normal conditions, the third through cavity 400 is kept against the sealing structure 200. When replacing the replacement package, the valve core 700 in the dropper bottle is first extended into the third through cavity 400 and fixed to the third through cavity 400. Then, a force is applied to the plug 400 to separate the third through cavity 400 from the sealing structure 200. Then, the material in the replacement package can enter the valve core 700 through the third through cavity 400. Of course, in actual production life, the third through cavity 400 can also be separated from the sealing structure 200 before connecting the replacement package. At this point, a person of ordinary skill in the art can understand that the design of the plug 400 in this patent is actually the key invention point of this patent. After the plug 400 is set, the valve core 700 of the dropper bottle is not directly in contact with the bottle body 100 of the replacement package, but is connected to the two through cavities in the replacement package through a plug 400 that plays a transmitting role. The sealed connection between the plug 400 and the valve core 700, and the sealed connection between the plug 400 and the bottle body 100 are two independent processes, which can avoid material leakage during the replacement process, and further avoid air entering the replacement package during the replacement process and affecting the quality of the cosmetics.

[0061] The way in which the third through cavity 400 abuts against the sealing structure 200 can be adjusted according to the shape of the third through cavity 400 and the shape of the sealing structure 200, and a sealing method such as surface contact and line contact can be adopted. In this patent, the side of the third through cavity 400 close to the sealing structure 200 is a circular hole 411, the shape of the sealing structure 200 is a truncated cone, and the axis of the sealing structure 200 overlaps with the axis of the circular hole 411, the radial dimension of the side of the sealing structure 200 close to the circular hole 411 is smaller than the radial dimension of the circular hole 411, and the radial dimension of the side of the sealing structure 200 away from the circular hole 411 is larger than the radial dimension of the circular hole 411. When the third through cavity 400 abuts against the sealing structure 200, the third through cavity 400 and the sealing structure 200 are in line-surface contact to achieve sealing. When used in cosmetic products, the material of the replacement can be a flexible material such as plastic. As long as enough force is applied to the plug 400, the contact surface between the circular hole 411 and the sealing structure 200 will undergo a certain deformation to ensure effective sealing. In addition, when the pressure is too high, the aperture of the edge hole of the circular hole 411 may increase, and an annular indentation may be generated at the corresponding position of the boss. When sealing the plug 400 again, it is only necessary to move the plug 400 further into the bottle body 100 a certain distance at the last sealing position to achieve sealing between the circular hole 411 and the boss, thereby facilitating repeated sealing and use of the replacement package.

[0062] like Figure 5 and Figure 7As shown, the radial dimension of the end of the plug 400 away from the sealing structure 200 increases to form a stepped surface 420. When the plug 400 is located at the end close to the sealing structure 200, the stepped surface 420 abuts against the end of the connecting section 120 away from the sealing structure 200. When the bottle body 100 and the material are both in a transparent state, the user can see whether the third through cavity 400 has abutted against the sealing structure 200. However, if one or more of the bottle body 100 or the material is not in a transparent state, it is difficult for the user to confirm whether the third through cavity 400 has abutted against the sealing structure 200. The stepped surface 420 is set at a suitable position, that is, when the stepped surface 420 abuts against the bottle body 100, the third through cavity 400 just abuts against the sealing structure 200, then the sealing state of the replacement can be known according to whether the stepped surface 420 and the bottle body 100 are tight or directly by hand feeling, simplifying production and daily use operations.

[0063] In this patent, Figure 5 and Figure 7 As shown, the first through cavity 121 is divided into a first section 122 and a second section 123. The first section 122 and the second section 123 can be arranged such that the first section 122 is close to the sealing structure 200 and the second section 123 is far away from the sealing structure 200, or the first section 122 is far away from the sealing structure 200 and the second section 123 is close to the sealing structure 200. Taking the first section 122 close to the sealing structure 200 as an example: the locking structure 500 includes an internal thread 510 arranged in the first section 122 and an external thread 520 arranged on the plug 400, the internal thread 510 is adapted to the external thread 520, and the second section 123 is interference-connected with the plug 400. By relatively rotating the plug 400 and the bottle body 100, the plug 400 can be moved close to or away from the sealing structure 200, so as to achieve the sealing or opening of the replacement package. The second section 123 and the plug 400 can be connected by various interference fit methods, for example, the overall radial dimension of the second section 123 is smaller than the radial dimension of the corresponding part of the plug 400, a sealing ring with a radial dimension larger than the radial dimension of the second section 123 can be provided on the outer circumference of the plug 400, or a sealing ring with a radial dimension smaller than the radial dimension of the corresponding part of the plug 400 can be provided on the inner circumference of the second section 123. In this patent, a sealing ring protruding outward is provided on the outside of the plug 400 to achieve the connection between the plug 400 and the first through cavity 121. In actual production, the above schemes are all within the protection scope of this patent.

[0064] like Figure 4-7As shown, there are two first blocks 421 on the stepped surface 420, and two second blocks 124 are correspondingly provided on the connecting section 120. When the plug 400 is rotated until the third through cavity 400 abuts against the sealing structure 200 to seal the third through cavity 400, the side surfaces of the first block 421 and the second block 124 abut against each other. From the user's perspective, when the plug 400 is rotated until it is completely tightened, there will be a sense of being stuck and unable to rotate, which further indicates the sealing condition of the third through cavity 400 and the sealing structure 200.

[0065] The present invention provides a specific embodiment of a replaceable dropper bottle, such as Figure 8-Figure 13 As shown, it includes: a tube body 600, which has a fourth through cavity 610 inside, the tube body 600 is the part held by the user, which is used to support and protect the internal structure to realize the function of the device as a dropper bottle. A hollow hole can be set on the tube body 600; a valve core 700 is arranged at one end of the fourth through cavity 610, connected to the outlet of the fourth through cavity 610, and used to extrude materials; a leak-proof liquid replacement package with the above characteristics is arranged in the fourth through cavity 610, the valve core 700 is detachably fixed to the plug 400, and is connected to the third through cavity 400. When the replacement package is opened, the material in the replacement package can enter the valve core 700 through the plug 400, and the valve core 700 is used to control the amount of material extrusion to avoid waste; and a pressing head 800 is located at one end of the tube body 600 away from the valve core 700, and the pressing head 800, the tube body 600 and the valve core 700 are fixed in sequence to realize the function of the dropper bottle. When the material replacement package is fixed into the tube body 600, and the plug 400 is opened so that the second through cavity 111, the third through cavity 400 and the valve core 700 are connected, pressing the pressing head 800 will cause the pressing head 800, the replacement package and the valve core 700 to move together toward the material outlet. During the process, the valve core 700 draws part of the material from the replacement package and sends it out from the material outlet, the piston 300 moves a certain distance toward the material outlet, and the air enters the second through cavity 111 from the pressing head 800 to supplement the space for the piston 300 to move. The valve core 700 has a spring. When the pressing head 800 is pressed, the valve core 700 will overcome the elastic force of the spring and move toward the material outlet under the action of the force. When the external force pressing the pressing head 800 is removed, the elastic force of the spring moves the valve core 700 toward the pressing head 800, thereby resetting the valve core 700 and restoring it to the state to be pressed.

[0066] In this patent, Figure 5 , Figure 7 , Fig.12 and Fig.13As shown, the third through cavity 400 is divided into a third section 412 and a fourth section 413. The third section 412 is close to the sealing structure 200. The radial dimension of the fourth section 413 is larger than the radial dimension of the third section 412. A step surface 414 is formed between the third section 412 and the fourth section 413. The valve core 700 passes through the fourth section 413 and is interference-connected with the third section 412. If the tube body 600 is in a transparent state, the user can visually install the replacement package. However, when the tube body 600 is made of non-transparent material, the installation of the replacement package is relatively difficult. The size of the fourth section 413 can be larger than the valve core 700, so that the plug 400 is conveniently placed on the valve core 700 during the installation process, and then the replacement package is pushed in. The valve core 700 will be smoothly inserted into the third section 412 under the guidance of the step surface 414, so that the user can quickly complete the replacement of the replacement package, and the operation is convenient.

[0067] The third section 412 and the valve core 700 may be connected in various interference fit ways, for example, the overall radial dimension of the third section 412 may be smaller than the radial dimension of the corresponding portion of the valve core 700, a sealing ring having a radial dimension larger than the radial dimension of the third section 412 may be provided on the outer circumference of the valve core 700, or a sealing ring having a radial dimension smaller than the radial dimension of the corresponding portion of the valve core 700 may be provided on the inner circumference of the third section 412. In actual production, the third section 412 and the fourth section 413 may also be provided with the same radial dimension.

[0068] like Figure 1 , Figure 4-7 and Fig.13 As shown, an external spline 430 is provided on the side of the plug 400 away from the sealing structure 200, and the external spline 430 is distributed in the circumferential direction of the axis of the third through cavity 400, and an internal spline 620 is correspondingly provided inside the tube body 600. In most cases, the dropper bottle used as a cosmetic container is relatively small in size. After the replacement package is inserted into the tube body 600, it will be difficult to operate the plug 400, so that the third through cavity 400 leaves the boss. After the spline is provided, the replacement package can be fixed and the bottle body 100 can be rotated, or the bottle body 100 can be fixed and the container can be rotated, so that the plug 400 can be relatively rotated relative to the bottle body 100, so that the replacement package is opened or sealed. At the same time, the spline guides the replacement package, so that the replacement package cannot rotate freely in the dropper bottle, improves the stability of the replacement package fixation, and facilitates the installation of the replacement package.

[0069] like Figure 8 , Figure 11-13 and Fig.16As shown, a replaceable dropper bottle also includes a bottle cap 900, which can cover the material outlet; the valve core 700 has a first limiting portion 710 with a flange extending toward the periphery; the side wall of the tube body 600 has a deformable elastic member 630, which is adapted to the bottle cap 900, and the elastic member 630 has a pair of clamping points located in the fourth through cavity 610 as a second limiting portion 631; when the bottle cap 900 is fixed to the tube body 600, the bottle cap 900 presses the elastic member 630 to make the first limiting portion 710 overlap with the second limiting portion 631 in the circumferential direction, thereby providing axial limitation for the valve core 700. The bottle cap 900 and the tube body 600 can be connected by various common methods such as interference connection and threaded structure connection. When the bottle cap 900 is closed, pressure is exerted on the elastic member 630, and the elastic member 630 will deform toward the inside of the tube body 600, so that the first limit portion 710 and the second limit portion 631 abut against each other, and the valve core 700 cannot move toward the material outlet direction, thereby locking the valve core 700 and further preventing the dropper bottle from leaking. At the same time, a pair of card points are provided on the inner wall of the tube body 600 as the fourth limit portion 640. When the pressing head 800 is released, the first limit portion 710 close to the side of the replacement device abuts against the fourth limit portion 640, and the fourth limit portion 640 can prevent the valve core 700 from falling out. In actual production, the positions of the first limiting portion 710 and the second limiting portion 631 can be relatively adjusted, and the fourth limiting portion 640 can also adopt other common structures for providing limitation for the valve core 700 in its axial direction, and the adjusted schemes are all within the protection scope of this patent.

[0070] like Fig.12 , 14 As shown in FIG. 15 , a limit block 130 is disposed on the outer side of the end of the bottle body 100 away from the plug 400, and a third limit portion 650 is disposed on the end of the tube body 600 close to the pressing head 800, and a notch 651 is formed on the third limit portion 650 to match the limit block 130. Fig.14 As shown in FIG. 1 , when the replacement is inserted, the stopper 130 enters the fourth through cavity 610 through the notch 651. Fig.15 As shown, the third limiting portion 650 abuts against the limiting block 130 in the axial direction of the tube body 600, providing a limit for the limiting block 130, so that the replacement device cannot be withdrawn from the tube body 600, thereby achieving locking of the replacement device.

[0071] Two third stops 660 are arranged on one side of the third limiter 650 close to the fourth through cavity 610. The third stopper 660 close to the notch 651 serves to remind the user of the rotation direction of the replacement device. When the stopper 130 passes the third stopper 660 far from the notch 651, a sense of jamming will be generated to remind the user to rotate to the right position. Finally, when the stopper 130 rotates through the stopper far from the notch 130 and is between the two third stops 660, the two third stops 660 limit the replacement device along the circumferential direction of the tube body 600 through the stopper 130, so as to realize the limitation of the replacement device in the circumferential direction of the tube body 600. The third limiter 650, the stopper 130 and the third stopper 660 cooperate with each other. When the stopper 130 rotates to between the two third stops 660, the replacement device just rotates to the state of sealing connection with the valve core 700, which is convenient for the user to install the replacement device and can also play a locking effect on the replacement device. In actual production. The shape of the notch 130 and the number and size of the third stopper 660 can be adjusted according to actual conditions, and the adjusted solutions are all within the protection scope of this patent.

[0072] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A leak-proof replacement package that can be sealed with the valve core of a dropper bottle, characterized in that: include: The bottle body comprises a main body section and a connecting section, wherein a first through cavity is formed in the connecting section, and a second through cavity communicated with the first through cavity is formed in the main body section, and openings are formed at two opposite ends of the main body section and the connecting section, and the second through cavity has a sealing structure inside; a piston, located inside the second through cavity and adapted to the second through cavity; and, A plug, the plug extends into the first through cavity and is sealed with the inner wall of the connecting section, the plug can move in the first through cavity along its extension direction, the plug is provided with a third through cavity, and the third through cavity has a mounting position for fixing the valve core, wherein: The plug and the connecting section are provided with matching locking structures, and the plug can be locked by the locking structure at one end close to the sealing structure, so that the side of the third through cavity close to the sealing structure abuts against the sealing structure, and the sealing structure seals the third through cavity; The side of the third through cavity close to the sealing structure is a circular hole, the sealing structure is in the shape of a truncated cone, the axis of the sealing structure overlaps with the axis of the circular hole, the radial dimension of the side of the sealing structure close to the circular hole is smaller than the radial dimension of the circular hole, and the radial dimension of the side of the sealing structure away from the circular hole is larger than the radial dimension of the circular hole; The end of the plug away from the sealing structure has a first stopper, and the connecting section is correspondingly provided with a second stopper; when the plug is located at an end close to the sealing structure, the first stopper and the second stopper abut against each other to provide a limit in the circumferential direction of the first through cavity.

2. A leak-proof liquid replacement package according to claim 1, characterized in that: The first through cavity is divided into a first section and a second section, the locking structure includes an internal thread arranged in the first section and an external thread arranged on the plug, the internal thread is adapted to the external thread, and the second section is interference connected with the plug.

3. A replaceable dropper bottle, characterized in that: include: The tube body has a fourth through cavity inside; A valve core is arranged at one end of the fourth through cavity; The anti-leakage liquid replacement package according to claim 1 or 2 is arranged in the fourth through cavity, the valve core is detachably sealed and fixed to the plug, and is in communication with the third through cavity; and The pressing head is located at one end of the tube body away from the valve core. The pressing head, the tube body and the valve core are fixed in sequence.

4. A replaceable dropper bottle according to claim 3, characterized in that: The tube body has a fourth limiting portion inside, and the fourth limiting portion provides limiting for the valve core along the axial direction of the valve core.

5. The replaceable dropper bottle according to claim 3, characterized in that: The third through cavity is divided into a third section and a fourth section, the third section is close to the sealing structure, the radial dimension of the fourth section is larger than the radial dimension of the third section, a step surface is formed between the third section and the fourth section, the valve core passes through the fourth section and is interference connected with the third section.

6. A replaceable dropper bottle according to claim 3, characterized in that: An external spline is arranged on a side of the plug away from the sealing structure, and the external spline is distributed in the circumferential direction of the axis of the third through cavity. An internal spline is correspondingly arranged inside the tube body.

7. A replaceable dropper bottle according to claim 3, characterized in that: It also includes a bottle cap, which is detachably fixed to the tube body; The valve core has a first limiting portion; The side wall of the tube body has a deformable elastic member, which is adapted to the bottle cap, and the elastic member has a second limiting portion located in the fourth through cavity; wherein, When the bottle cap is fixed to the tube body, the bottle cap presses the elastic member so that the first limiting portion and the second limiting portion overlap in the axial direction, thereby providing axial limiting for the valve core; When the bottle cap is not pressed against the elastic member, the first limiting portion and the second limiting portion are separated from each other in the axial direction.

8. The replaceable dropper bottle according to claim 3, characterized in that: A limiting block is arranged on the outer wall of the bottle body on one side away from the sealing structure, and the end of the tube body close to the pressing head has a third limiting portion with a notch, and a third stopper is arranged on the side of the third limiting portion close to the fourth through cavity, and the limiting block can enter the fourth through cavity through the notch, and the third stopper is used to provide the limiting block with a limit in the circumferential direction of the bottle body; wherein, When the limiting block is located in the fourth through cavity and is misaligned with the notch in the circumferential direction of the third limiting portion, the third limiting portion provides limiting for the limiting block along the axial direction of the tube body.

Images