Elastic bag and pressing pump comprising same

Abstract

The utility model provides an elastic bag and a pressing pump comprising the elastic bag, the elastic bag comprises a threaded tubular compression part with compression resilience performance, an accommodating cavity formed at the inner side of the compression part, a first connecting part constructed at one end of the compression part, and a valve structure integrally connected to the inner side of the first connecting part, the compression part is provided with an internal thread structure and an external thread structure corresponding to the internal thread structure. The compression part is constructed to be in a threaded pipe shape, so that demolding is carried out through spiral movement, and deformation during demolding is avoided; and the threaded tubular compression part has better stress transmission performance, so that more contents can be extruded under the condition of equal force application, and the service life of the elastic bag can be effectively prolonged. The first connecting part and the valve structure are constructed at one end of the compression part and connected with the fixed seat to form the lower one-way valve, so that the situation that the sealing performance of the lower one-way valve is reduced due to upward pressure impact on the valve structure of the pressing pump is avoided, and the manufacturing cost of the pressing pump can be saved.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to an elastic bag and a pressing pump comprising the elastic bag. Background Art

[0002] Pressing pumps are widely used in the fields of daily chemical cleaning products, skin care products, food, medicine, etc., and the products contained in the container are pumped out for use by pressing.

[0003] At present, the pressing pump generally uses a metal spring as an elastic reset device, so that after the pressing pump is pressed to pump the product, the pressing pump can be reset to wait for the next pumping. As relevant laws and regulations have raised environmental protection requirements, bladder-type pressing pumps have appeared on the market. In the bladder-type pressing pump, an elastic bladder made of thermoplastic elastomer (TPE) can be used to replace the original metal spring, and the elastic force generated by the compression of the elastic bladder is used to reset the pressing pump. The bladder-type pressing pump realizes the full plasticization of the pressing pump, so as to meet the requirements for recycling and regenerating the pressing pump.

[0004] The elastic bladder in the prior art includes a compression portion formed by folds repeatedly arranged along the axial direction of the elastic bladder and openings formed at both ends of the compression portion in the axial direction, wherein the compression portion is in the shape of a straight bellows. The compression portion in the shape of a straight bellows is not easy to demold: during the manufacturing process, the demolding method of directly pulling it out of the mold is used, which easily causes deformation of the compression portion, affecting the compression, rebound and service life of the elastic bladder.

[0005] During the application process, it was found that the existing capsule-type compression pumps still have the problems of heavy pressing feel and short service life. The rebound and reset performance is not ideal after long-term use, and it is easy for the pump to rebound slowly or fail to reset normally before the product in the container has been used up. The applicant found through research that the main reason for the heavy pressing feel is that the stress of the bellows-shaped compression part after being compressed is converted into radial deformation and axial deformation, resulting in low conversion efficiency of the pressing force; the problem of short service life is mainly due to the fact that the bellows-shaped compression part is composed of multiple parallel segments connected along the axial direction, and the uneven force causes elastic deformation in different parts after long-term use, thereby shortening the service life.

[0006] In the prior art, between the push pump and the container, the lower valve body is fixed in the lower valve seat by embedding to form a lower check valve. This embedding fixation of a relatively small valve body requires very high processing accuracy for the concentricity of the embedding space and the valve body, the positioning ribs of the embedding port, etc.; and when the lower check valve is opened, the contents in the container pass through the through hole of the lower valve seat and enter the receiving cavity, which easily causes impact and displacement to the lower valve body, thereby reducing the sealing performance of the push pump.

[0007] In view of this, it is necessary to improve the elastic bag and the pressing pump in the prior art to solve the above problems. Utility Model Content

[0008] The utility model aims to provide an elastic bag and a pressing pump comprising the elastic bag, so as to solve the problems that the compression part of the existing elastic bag is easy to deform during demoulding and the pressing force conversion efficiency is low.

[0009] To achieve the above-mentioned purpose, the utility model provides an elastic bag, including a compression part in the shape of a threaded tube, a receiving chamber formed on the inner side of the compression part, a first connecting part constructed at one end of the compression part, a valve structure integrally connected to the inner side of the first connecting part, a first opening constructed at the first connecting part and connected to the receiving chamber, and a second opening constructed at the other end of the compression part and connected to the receiving chamber. The compression part is constructed with an internal thread structure formed on the inner surface of the compression part and an external thread structure formed on the outer surface of the compression part. The external thread structure corresponds to the internal thread structure to construct the compression part with uniform thickness. The compression part is configured so that when a pressing force is applied to the compression part, the compression part is compressed, and when the pressing force is removed, the compression part rebounds.

[0010] As a further improvement of the present invention, the elastic bag is conical, and the second opening is larger than the first opening.

[0011] As a further improvement of the present invention, the first connecting portion includes a first annular surface formed at one end of the compression portion, and a first annular wall formed by the inner edge of the first annular surface protruding outward along the axial direction of the elastic bag, and the end of the first annular wall constructs the first opening, and the valve structure includes a first valve cover arranged in the central area of ​​the first opening, and a first connecting rib integrally connecting the first valve cover and the first annular wall, and the first valve cover, the first connecting portion and the first connecting rib construct a first flow channel.

[0012] As a further improvement of the present invention, the elastic bag also includes a second connecting portion constructed at the other end of the compression portion, the second connecting portion includes a second annular surface formed at the other end of the compression portion, and a second annular wall formed by the outer edge of the second annular surface protruding outward along the axial direction of the elastic bag, and the end of the second annular wall constructs the second opening.

[0013] The utility model also provides a pressing pump, including a fixed seat, a pressing piece connected to the top of the fixed seat for relative movement, the pressing piece and the fixed seat cooperate with each other to form a accommodating space, the accommodating space accommodates the above-mentioned elastic bag, and the first connecting part is connected to the fixed seat to form a lower one-way valve.

[0014] As a further improvement of the present invention, the fixing seat is constructed with a first through hole, and the valve structure includes a first valve cover arranged at the first opening, and the first valve cover closes or opens the first through hole to isolate or connect the accommodating cavity with the external space of the fixing seat.

[0015] As a further improvement of the present invention, the pressing piece is configured with a discharge channel, an upper one-way valve is arranged between the pressing piece and the elastic bag, the upper one-way valve includes a valve seat arranged at the second opening and a valve body arranged at the valve seat, the valve seat is configured with a second through hole, the valve body is configured with a second valve cover, the second valve cover closes or opens the second through hole to seal the accommodating cavity and the discharge channel.

[0016] As a further improvement of the present utility model, the valve structure includes a first valve cover constructed in the central area of ​​the first opening and a first connecting rib integrally connecting the first valve cover and the first connecting part, the valve body includes a second valve cover arranged in the central area of ​​the valve body and a second connecting rib integrally connecting the second valve cover to the valve body, the hardness of the valve body is greater than the hardness of the valve structure, and under the same pressure, the deformation generated by the first connecting rib is greater than the deformation generated by the second connecting rib.

[0017] As a further improvement of the present invention, the elastic bag also includes a second connecting part constructed at the other end of the compression part, the valve seat is positioned at the second connecting part, the pressing piece also includes a positioning ring and a sleeve formed by cantilevering from the top of the pressing piece to one side of the elastic bag, and the valve seat includes a second annular wall formed by the edge of its bottom protruding toward one side of the pressing piece, the second annular wall is fitted to the inner wall surface of the second connecting part and is embedded between the positioning ring and the sleeve together with the second connecting part.

[0018] As a further improvement of the present invention, the pressing member has a discharge port, the discharge port is provided with a truncation structure, and the truncation structure has at least two intersecting slits so that the truncation structure is divided into openable and closable petals.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model provides an elastic bladder, whose compression part is constructed in a threaded tubular shape. An internal thread structure is formed on the inner surface of the compression part, so that the mold can be demoulded by a spiral motion, thereby avoiding deformation caused by demoulding by pulling out. From the perspective of stress transmission efficiency, the stress of the threaded tubular compression part after being compressed is only converted into axial deformation. Under the condition of the same size and the same pressure, the axial deformation of the threaded tubular compression part is greater than the axial deformation of the corrugated tubular compression part, resulting in that under the same force, more contents can be squeezed out by using the threaded tubular compression part. When a pressing force is applied to the threaded tubular compression part, the stress can be evenly transmitted to the entire thread, thereby effectively extending the service life of the elastic bladder and allowing users to experience balanced pressing throughout the entire product life cycle.

[0021] A first connection part integrally connected with the valve structure is constructed at one end of the compression part, and the first connection part is connected to the fixing seat to form a lower one-way valve, so that the compression pump will not have a situation where the sealing performance of the lower one-way valve is reduced due to the upward pressure impact on the valve structure. At the same time, using the first connection part as the base of the valve structure can not only save material costs, but also save the processing step of constructing an embedding area on the fixing seat for embedding the lower valve body, and can reduce the assembly steps of forming the lower one-way valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A three-dimensional diagram of an elastic bag provided by the utility model;

[0023] Figure 2 for Figure 1 A three-dimensional view of the elastic bladder from another angle is provided;

[0024] Figure 3 A cross-sectional schematic diagram of the elastic bag provided by the utility model;

[0025] Figure 4 for Figure 3 A magnified view of part A in FIG.

[0026] Figure 5 A cross-sectional schematic diagram of the elastic bag provided by the utility model;

[0027] Figure 6 for Figure 5 A magnified view of part B in FIG.

[0028] Figure 7 A three-dimensional exploded view of a pressing pump provided by the utility model;

[0029] Figure 8 for Figure 7 A three-dimensional exploded view of the pressing pump from another angle;

[0030] Fig. 9 A three-dimensional exploded view of an elastic bag and an upper one-way valve provided by the utility model;

[0031] Fig.10 A cross-sectional view of a pressing pump provided by the utility model;

[0032] Fig.11 A cross-sectional view of a pump-type packaging bottle provided by the utility model;

[0033] Fig.12 The present invention is a three-dimensional exploded view of a pump-type packaging bottle provided by the utility model. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0035] Example 1

[0036] Combination Figures 1 to 6 As shown, the utility model provides an elastic bag 10, including a compression part 11 in the shape of a threaded tube, a receiving chamber 12 formed on the inner side of the compression part 11, a first connecting part 113 constructed at one end of the compression part 11, a valve structure 14 integrally connected to the inner side of the first connecting part 113, a first opening 121 constructed at the other end of the compression part 11 and connected to the receiving chamber 12, and a second opening 122 constructed at the other end of the compression part 11 and connected to the receiving chamber 12.

[0037] The compression part 11 is configured with an internal thread structure 111 and an external thread structure 112, wherein the internal thread structure 112 is formed on the inner surface of the compression part 11, and the external thread structure 112 is formed on the outer surface of the compression part 11. The external thread structure 112 corresponds to the internal thread structure 111 to configure the compression part 11 with a thickness uniformly arranged along the extension direction of the thread. The compression part 11 is configured such that when a pressing force is applied to the compression part 11, the compression part 11 is compressed, and when the pressing force is removed, the compression part rebounds.

[0038] Ginseng Figure 3 and Figure 4As shown in the cross-sectional view of the elastic bag 10, in one embodiment, the thread profile of the internal thread structure 111 is triangular, that is, the inner concave portion 1111 formed on the inner surface of the compression part 11 has a triangular profile in the cross-sectional area passing through the thread axis L. By setting the thread pitch of the internal thread structure 111, the inner convex portion 1112 on the inner surface of the compression part 11 has a triangular profile in the cross-sectional area of ​​the corresponding thread axis L. The thread profile of the external thread structure 112 is triangular, that is, the outer convex portion 1121 formed on the outer surface of the compression part 11 has a triangular profile in the cross-sectional area passing through the thread axis L. By setting the thread pitch of the external thread structure 112, the outer concave portion 1122 on the outer surface of the compression part 11 has a triangular profile in the cross-sectional area of ​​the corresponding thread axis L. The external thread structure 112 corresponds to the internal thread structure 111, that is, the inner concave portion 1111 of the internal thread structure 111 is formed corresponding to the outer convex portion 1121 of the external thread structure 112, and the inner convex portion 1112 of the internal thread structure 111 is formed corresponding to the outer concave portion 1122 of the external thread structure 112, so that the thickness of the compression part 11 is uniformly arranged along the spiral extension direction of the internal thread structure 111 or the external thread structure 112, so that the compression part 11 is evenly stressed.

[0039] In this embodiment, the thread profile of the internal thread structure 111 is triangular, that is, the inner concave portion 1111 formed on the inner surface of the compression portion 11 has a triangular profile in the cross-sectional area passing through the thread axis L. When compressed, the upper wall surface and the lower wall surface corresponding to the inner concave portion 1111 can fit together, which has a higher transmission efficiency of compression force or rebound force on the one hand, and can squeeze all the contents in the inner concave portion 1111 into the middle of the receiving cavity 12 for pumping on the other hand, thereby improving the pumping efficiency.

[0040] The compression part 11 can be constructed as a single-thread, double-thread or multi-thread, all of which have strong connection strength and fatigue resistance. In order to improve the strength of the compression part 11 and avoid stress concentration during injection molding, the top and bottom of the threads of the internal thread structure 111 and the external thread structure 112 (i.e., corresponding to the triangular profile shape of the threads in this embodiment) are provided with transition fillets.

[0041] Ginseng Figure 5 and Figure 6As shown in the cross-sectional view of the elastic bag 10', in one embodiment, the compression part 11' is constructed as a double-threaded thread, that is, a thread type having two spirals (spiral a indicated by a solid line, and spiral b indicated by a dotted line). Among them, the thread tooth profile of the internal thread structure 111' is triangular, that is, the inner concave part 1111' formed on the inner surface of the compression part 11' has a triangular profile shape on the cross-sectional area passing through the thread axis L'. By setting the thread pitch of the internal thread structure 111', the inner convex part 1112' on the inner surface of the compression part 11' has a trapezoidal profile shape on the cross-sectional area of ​​the corresponding thread axis L'. The thread tooth profile of the external thread structure 112' is trapezoidal, that is, the outer convex part 1121' formed on the outer surface of the compression part 11' has a trapezoidal profile shape on the cross-sectional area passing through the thread axis L'. By setting the pitch of the thread of the external thread structure 112', the outer concave portion 1122' on the outer surface of the compression portion 11' is formed into a triangular shape in the cross-sectional area of ​​the corresponding thread axis L'. The external thread structure 112' corresponds to the internal thread structure 111', that is, the inner concave portion 1111' of the internal thread structure 111' is formed corresponding to the outer convex portion 1121' of the external thread structure 112', and the inner convex portion 1112' of the internal thread structure 111' is formed corresponding to the outer concave portion 1122' of the external thread structure 112'.

[0042] The compression portion 11' is constructed as a double-thread, which has higher connection strength and fatigue resistance than a single-thread, and can make the thickness of the compression portion 11' more evenly arranged along the extension direction of any helix (helix a or helix b) of the thread (internal thread structure 111' and / or external thread structure 112') to have a more stable stress transfer efficiency. In order to improve the strength of the compression portion 11' and avoid stress concentration during injection molding, the top and bottom of the internal thread structure 111' and the external thread structure 112' (i.e., corresponding to the triangular or trapezoidal profile shape in this embodiment) are provided with transition fillets.

[0043] In other alternative embodiments, the compression portion 11 ′ may also be constructed as a multi-thread, and the internal thread structure 111 ′ and the external thread structure 112 ′ may also be assembled using other thread profile structures.

[0044] Because the bellows-shaped compression part in the prior art can only be formed by closing the mold along the axial direction of the bellows, and the inner mold is demolded by directly pulling out, the bellows, which is roughly cylindrical in shape, is easily deformed during the demolding process, resulting in the failure of the cross-sections of the bellows that are continuously arranged in the horizontal direction to form a circle, which leads to the problems of uneven pressure of the pumped contents and easy deformation during demolding in the bellows-shaped compression part in the prior art. The compression parts 11, 11' disclosed in this embodiment are designed to solve the problems of the aforementioned bellows-shaped compression parts. By constructing the compression parts 11, 11' into a threaded tube shape, the probability of deformation during demolding and the effect of uniform pressure of the pumped contents can be achieved.

[0045] The inner surface of the compression part 11, 11' is configured as an internal thread structure, so that the elastic bladder 10, 10' can be smoothly demolded by performing a spiral motion on the mold, so that the elasticity of the elastic bladder 10, 10' is not affected or deformation of the elastic bladder 10, 10' is not caused during demolding.

[0046] From the perspective of stress transfer efficiency, the stress of the bellows-shaped compression part in the prior art after being compressed is converted into radial deformation and axial deformation, while the stress of the tapered threaded tubular compression parts 11, 11' after being compressed in the present application is only converted into axial deformation. Under the conditions of the same size and the same pressure, the axial deformation of the threaded tubular compression parts 11, 11' is greater than the axial deformation of the bellows-shaped compression parts, resulting in that under the same force, the threaded tubular compression parts 11, 11' can squeeze out more contents.

[0047] From the perspective of the content conveying performance, the pressure required for the contents to rise through the compression parts 11, 11' whose inner surfaces are internally threaded structures 111, 111' is less than the pressure required for the compression parts whose inner surfaces are corrugated structures in the prior art to rise. That is to say, when other conditions are the same, the same amount of discharge can be achieved through the pressing pump. The compression parts 11, 11' are in the shape of threaded tubes, which can reduce the pressing force required to be provided by the user, thereby achieving a labor-saving effect.

[0048] In addition, the corrugated tube-shaped compression part is subjected to uneven force, which may cause elastic deformation of different parts after long-term use. When a pressing force is applied to the threaded tube-shaped compression part 11, 11', the stress can be evenly transmitted to the entire thread, thereby effectively extending the service life of the compression part 11, 11', and users can experience balanced pressing during the entire product use cycle.

[0049] Combination Figures 1 to 3As shown, the first connecting portion 113 includes a first annular surface 1131 formed at one end of the compression portion 11 and a first annular wall 1132 formed by the inner edge of the first annular surface 1131 protruding toward the axial outer side of the elastic bag 10. The end of the first annular wall 1132 forms a first opening 121.

[0050] The valve structure 14 includes a first valve cover 141 disposed in the central area of ​​the first opening 121, and a first connecting rib 142 integrally connecting the first valve cover 141 and the first annular wall 1132. The first valve cover 141, the first annular wall 1132 and the first connecting rib 142 constitute a first flow channel 143. In this embodiment, in order to stably connect the first valve cover 141 to the first annular wall 1132 as a whole, three first connecting ribs 142 are evenly disposed along the outer circumference of the first valve cover 141 for connection, and three first flow channels 143 evenly arranged along the outer circumference of the first valve cover 141 are constituted. The shape of the first connecting rib 142 may be arc-shaped, Z-shaped or other shapes.

[0051] The elastic bag 10 further includes a second connecting portion 114 configured at the other end of the compression portion 11, and the second connecting portion 114 includes a second annular surface 1141 formed at the other end of the compression portion 11, and a second annular wall 1142 formed by the outer edge of the second annular surface 1141 protruding outward along the axial direction (the direction of the thread axis L) of the elastic bag 10. The end of the second annular wall 1142 configures a second opening 122.

[0052] In one embodiment, the elastic bag 10 is conical, and the second opening 122 is larger than the first opening 121. When demolding, the inner mold is rotated and pulled out from one side of the second opening 122 along the thread track. Only a short distance is required to separate the inner mold and the compression part 11, thereby further reducing the probability of deformation during demolding. In other alternative embodiments, according to different application requirements, the diameters of the first opening 121 and the second opening 122 can also be set to be equal.

[0053] In this embodiment, the elastic capsule 10 is made of thermoplastic elastomer (TPE), and by adding additives of different components, one-to-one adaptation can be achieved for different paste fluidity and viscosity, so as to achieve a suitable hand feel when pressed. In application, for example, the thickness of the compression portion 11 can be set to 0.2mm-1mm, preferably 0.4mm-0.5mm.

[0054] Example 2

[0055] Combination Figures 7 to 10 As shown, the utility model provides a pressing pump 102, including a fixing seat 20, and a pressing member 30 connected to the top of the fixing seat 20 for relative movement. The pressing member 30 and the fixing seat 20 cooperate with each other to form a receiving space, in which the elastic bag 10 provided in Example 1 is received.

[0056] The first connecting portion 113 is connected to the fixing seat 20 and forms a lower one-way valve 401, which is configured to allow the contents to flow into the receiving chamber 12 from below the fixing seat 20 through the lower one-way valve 401, but prevent the contents contained in the receiving chamber 12 from flowing out through the lower one-way valve 401.

[0057] An upper one-way valve 402 is provided between the pressing member 30 and the elastic bag 10 , and the upper one-way valve 402 is configured to allow the contents contained in the receiving chamber 12 to flow into the discharge channel 33 , but prevent external air or impurities from entering the receiving chamber 12 through the discharge channel 33 .

[0058] Ginseng Fig.10 As shown, in the present embodiment, a first positioning portion 201 is provided on the fixing seat 20. For example, a first positioning portion 201 formed by an upward protrusion of the bottom of the fixing seat 20 is constructed on the fixing seat 20. The first annular wall 1132 is inserted into the inner side of the first positioning portion 201 and is interference fit. The first annular surface 1131 is supported on the upper end surface of the first positioning portion 201, so that the first connecting portion 113 is positioned and connected to the first positioning portion 201, thereby realizing the positioning connection between the elastic bag 10 and the fixing seat 20.

[0059] The center of the fixed seat 20 is provided with a first through hole 202, the lower one-way valve 401 uses the fixed seat 20 as a valve seat, the first valve cover 141 is adapted to the first through hole 202, and the first valve cover 141 closes or opens the first through hole 202 to seal or connect the receiving cavity 12 with the external space of the fixed seat 20. The first valve cover 141 can be set to an oblate shape, or can be set to a truncated cone shape with a larger upper part and a smaller lower part, so that the first valve cover 141 can be better accommodated in the first through hole 202, and has an interference fit with the inner wall of the first through hole 202 to form a better sealing effect.

[0060] In this embodiment, a first connection portion 113 integrally connected with the valve structure 14 is constructed at the lower end of the compression portion 11, and the first connection portion 113 is connected to the fixing seat 20 to form a lower one-way valve 401, so that when the valve structure 14 is subjected to an upward pressure impact, the pressing pump 102 will not have a situation where the sealing performance of the lower one-way valve 401 is reduced due to the displacement of the first connection portion 113. At the same time, using the first connection portion 113 as the base of the valve structure 14 not only saves material costs, but also saves the processing steps of constructing an embedding area on the fixing seat 20 for embedding the lower valve body, and reduces the assembly steps of forming the lower one-way valve 401.

[0061] Combination Figures 7 to 10As shown, the pressing member 30 includes a discharge port 31 disposed on one side of the upper surface of the pressing member 30, a pressing portion 32 disposed on the other side of the upper surface of the pressing member 30, and a discharge channel 33 disposed inside the pressing member 30 and connected to the discharge port 31. The pressing portion 32 can be designed with a plurality of protrusions 320 as a point of force for the finger when pressing, so as to reduce the downward pressing force and control the discharge amount more accurately.

[0062] The pressing member 30 further includes a first positioning ring 301, a second positioning ring 302 and a first sleeve 303 which are formed by the top of the pressing member 30 hanging downward, wherein the first positioning ring 301 is arranged in the central area of ​​the pressing member 30, and the inner side of the first positioning ring 301 is configured with a discharge channel 33. The second positioning ring 302 is coaxially arranged on the circumferential outer side of the first positioning ring 301, and the first sleeve 303 is coaxially arranged on the circumferential outer side of the second positioning ring 302.

[0063] The upper check valve 402 includes a valve seat 41 and a valve body 42 disposed in the valve seat 41. The valve seat 41 is disposed inside the second connecting portion 114. The bottom edge of the valve seat 41 is supported on the second annular surface 1141. The bottom surface of the valve seat 41 forms a blocking surface for blocking the second opening 122. The valve seat 41 includes a second through hole 410 constructed in the center, an inner annular wall 411 protruding upward from the center area of ​​the bottom, and an outer annular wall 412 protruding upward from the edge of the bottom.

[0064] The valve body 42 includes an annular base 420, a second valve cover 421 constructed in the central area of ​​the base 420, and a second connecting rib 422 integrally connecting the second valve cover 421 and the base 420. The base 420, the second valve cover 421 and the second connecting rib 422 construct a second flow channel 423. In this embodiment, in order to stably connect the second valve cover 421 to the base 420, three second connecting ribs 422 are evenly arranged along the outer circumference of the second valve cover 421 for connection, and three second flow channels 423 evenly arranged along the outer circumference of the second valve cover 421 are constructed. The second connecting rib 422 can be arc-shaped, Z-shaped or other shapes.

[0065] The second valve cover 421 is adapted to the second through hole 410, and the second valve cover 421 closes or opens the second through hole 410 to seal the receiving chamber 12 and the discharge channel 33. The second valve cover 421 can be set to an oblate shape, or a truncated cone shape with a larger top and a smaller bottom, so that the second valve cover 421 can be better accommodated in the second through hole 410 and have an interference fit with the inner wall of the second through hole 410 to form a better sealing effect.

[0066] The outer circumference of the first positioning ring 301 is fitted to the inner circumference of the inner ring wall 411, and the base 420 is pressed between the lower end surface of the first positioning ring 301 and the bottom of the valve seat 41, thereby realizing the connection between the upper check valve 402 and the pressing member 30. The valve body 42 is connected by pressing, which can reduce the requirements for processing accuracy, and can also ensure the stability of the connection and pressure transmission between the components forming the upper check valve 402, thereby improving the pressing efficiency.

[0067] The outer annular wall 412 is fitted to the inner wall surface of the second annular wall 1142 , and the outer annular wall 412 and the second annular wall 1142 are jointly embedded between the second positioning ring 302 and the first sleeve 303 of the pressing member 30 , and form an interference fit, thereby realizing the connection between the elastic bag 10 , the upper one-way valve 402 and the pressing member 30 .

[0068] In this embodiment, the pressing member 30 and the elastic bag 10 are connected by a double positioning connection at the center area and the edge of the valve seat 41, which can increase the stability of the connection, increase the contact area, and improve the pressure transmission efficiency. In this embodiment, the diameter of the second opening 122 of the elastic bag 10 is set to be larger than the diameter of the first opening 121, which is more convenient for constructing a double positioning connection at the center area and the edge of the valve seat 41.

[0069] Ginseng Figure 8 As shown, in one embodiment, the discharge port 31 of the pressing member 30 is further provided with a cutting structure 310, and the cutting structure 310 has at least two intersecting slits, so that the cutting structure 310 can be divided into opening and closing petals. In the process of extruding the contents from the discharge port 31, the cutting structure 310 opens from the inside to the outside to form an extrusion port. After the extrusion is completed, the petals cut off the contents during the closing process, so as to avoid the contents of the discharge port 31 from remaining or hanging, which affects the user experience.

[0070] Combination Figure 7 , Figure 8 and Fig.10As shown, in this embodiment, the pressing member 30 and the fixing seat 20 are connected in a sliding manner. For example, the outer circumferential surface of the first sleeve 303 is configured with a flange 3031, and the second sleeve 203 is configured by the bottom edge of the fixing seat 20 protruding upward, and the upper limit portion 2031 is configured at the upper end of the inner circumferential surface of the second sleeve 203. In a natural state, the pressing member 30 and the fixing seat 20 are connected, and the flange 3031 is abutted against the upper limit portion 2031. The pressing member 30 is pressed, and the flange 3031 slides downward along the inner circumferential surface of the second sleeve 203. After the force is released, the flange 3031 is pushed back to the upper limit portion 2031 by the restoring force of the elastic bag 10, and the pressing member 30 is restored to its original state. A lower limit portion 2032 is provided on the lower side of the inner circumference of the second sleeve 203 to limit the maximum downward sliding stroke of the flange 3031 along the inner circumference of the second sleeve 203, so as to avoid the pressing member 30 being pressed too long, resulting in difficulty in applying force and waste of contents.

[0071] In this embodiment, the valve body 42 is made of polyethylene (PE), and the first valve cover 421 and the first connecting rib 422 are also made of polyethylene (PE), with a Shore hardness D of 45-70. The valve seat 41 in the upper one-way valve 402 is made of polypropylene (PP). The fixing seat 20 and the pressing member 30 are also made of plastic, for example, made of polypropylene (PP) or polyethylene (PE) by injection molding. In this way, the pressing pump 102 provided in this embodiment is made of all plastic material, and can be recycled as a whole without being classified and disassembled.

[0072] The Shore A hardness of thermoplastic elastomer (TPE) is 20-70, and its hardness is less than that of polyethylene (PE). Therefore, the hardness of the first valve cover 141 is less than that of the second valve cover 421, and the hardness of the first connecting rib 142 is less than that of the second connecting rib 422. Under the same pressure, the deformation of the first connecting rib 142 is greater than that of the second connecting rib 422. The hardness of the first valve cover 141 is less than that of the second valve cover 421, so that the pressure difference required to open the lower check valve 401 is less than the pressure difference required to open the upper check valve 402, so that the lower check valve 401 can be opened more easily during the rebound process of the compression part 11.

[0073] The press pump 102 provided by the utility model, by adopting the lower one-way valve 401 and the upper one-way valve 402 of the valve cover sealing method, performs double stable sealing and flow control on the contents, thereby improving the sealing performance of the press pump 102. Applying the press pump 102 to the pumping container can better maintain the vacuum state of the pumping container, reduce the number of presses required when the user uses it for the first time or uses it again after a long period of non-use, and can effectively avoid the problems of pump breakage and wall hanging during use. At the same time, the better sealing performance also expands the tolerance and applicability of the press pump 102 to the viscosity of the contents. For example, the press pump 102 provided by the utility model can not only be used to pump toothpaste, lotion and other semi-fluid materials, but also can be used to pump liquid materials such as toner and essence water. Due to the excellent sealing performance of the press pump 102, it can even achieve the effect of directly pumping air.

[0074] Example 3

[0075] Please refer to Fig.11 and Fig.12 As shown, the utility model provides a pump-type packaging bottle 100, comprising a bottle body 101, a pressing pump 102 installed on the top of the bottle body 101, a piston 103 installed in the bottle body 101, a base 104 arranged at the bottom of the bottle body 101, and an upper cover 105 covering the pressing pump 102. The pressing pump 102 is the pressing pump 102 provided in Example 2.

[0076] The bottle body 101 is cylindrical and includes a side wall 1011 . The side wall 1011 forms a top opening 1013 and a bottom opening 1014 . The side wall 1011 encloses a storage cavity 1012 for accommodating contents.

[0077] The pressing pump 102 is connected to the bottle body 101, and the fixing seat 20 is embedded in the top opening 1013, wherein the bottom of the fixing seat 20 forms a blocking surface for blocking the top opening 1013, and the storage chamber 1012 is connected to the receiving chamber 12 only through the first through hole 202. The fixing seat 20 and the bottle body 101 are detachably connected, for example, by a snap connection or a threaded connection. When the fixing seat 20 is embedded in the top opening 1013, the pressure in the storage chamber 1012 is greater than the pressure in the receiving chamber 12, the lower one-way valve 401 is opened, and the contents in the storage chamber 1012 are squeezed into the receiving chamber 12, so that the receiving chamber 12 is pre-filled with a part of the contents, so that the user can press out the contents as soon as possible when using it for the first time. The amount of pre-filled contents in the elastic bag 10 can be adjusted by adjusting the height of the fixing seat 20 embedded in the bottle body 101 and the filling amount of the contents.

[0078] A piston 103 is provided at the bottom of the bottle body 101, and the piston 103 is used to seal the bottom opening 1014. After the storage cavity 1012 is filled with the contents, the storage cavity 1012 is in a vacuum state. Therefore, the piston 103 will rise as the contents in the storage cavity 1012 decrease.

[0079] The pressing pump and the bottle body of the existing pump-type packaging bottle are generally fixedly connected, so that filling can only be performed from the bottom opening of the bottle body. However, the pressing pump 102 and the bottle body 101 of the pump-type packaging bottle 100 provided in this embodiment are separately arranged, and the filling method can be adopted to fill from the top opening 1013 of the bottle body 101 (i.e., top filling) or from the bottom opening 1014 of the bottle body 101 (i.e., bottom filling), so as to meet the requirements of different filling processes. After the filling is completed, the base 104 is connected to the bottom opening 1014, and a vent hole is provided on the base 104, or, in other alternative embodiments, the base 104 can be constructed as a support portion integrally formed with the bottom of the bottle body 101.

[0080] The working principle of the pump packaging bottle 100 will be described below.

[0081] During use, the user applies pressure to the pressing portion 32, causing the pressing member 30 to slide downward in the fixing seat 20, driving the compression portion 11 of the elastic bag 10 to compress downward. At this time, the space of the receiving chamber 12 becomes smaller, thereby causing the pressure in the receiving chamber 12 to rise, pushing open the upper one-way valve 402, so that the contents in the receiving chamber 12 are pumped out.

[0082] When the user releases the pressure applied to the pressing part 32, the compression part 11 returns to its original position under the action of its resilience, and at the same time pushes the pressing member 30 to return to its original position. At this time, the available space of the receiving chamber 12 increases, so that the pressure in the receiving chamber 12 decreases, and the pressure in the storage chamber 1012 is greater than the pressure in the receiving chamber 12, so that the lower one-way valve 401 opens, so that the content in the storage chamber 1012 flows into the receiving chamber 12, and is ready for the next pressing and use.

[0083] Since the hardness of the first valve cover 141 is less than that of the second valve cover 421, the pressure difference required to open the lower check valve 401 is less than the pressure difference required to open the upper check valve 402, so that during the rebound process of the compression part 11, the lower check valve 401 can be opened more easily, so that the contents in the storage cavity 1012 can enter the receiving cavity 12 more easily, and the receiving cavity 12 is replenished with the contents; the hardness of the first connecting rib 142 is less than that of the second connecting rib 422, so that during the opening process of the lower check valve 401, the first connecting rib 142 is subjected to the pressure of the contents squeezing upward to produce a large deformation, thereby increasing the flow channel area of ​​the second flow channel 143, thereby increasing the speed of replenishing the contents in the receiving cavity 12 during the opening process of the lower check valve 401. In addition, the press pump 102 provided by the utility model has good sealing performance, so that the press-type packaging bottle 100 provided by the utility model can more easily achieve the technical purpose of pumping out the contents at the first press.

[0084] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

[0085] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0086] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An elastic bag, characterized in that: It includes a compression part in the shape of a threaded tube, a receiving chamber formed on the inner side of the compression part, a first connecting part constructed at one end of the compression part, a valve structure integrally connected to the inner side of the first connecting part, a first opening constructed at the first connecting part and connected to the receiving chamber, and a second opening constructed at the other end of the compression part and connected to the receiving chamber. The compression part is constructed with an internal thread structure formed on the inner surface of the compression part and an external thread structure formed on the outer surface of the compression part. The external thread structure corresponds to the internal thread structure to construct the compression part with uniform thickness. The compression part is configured so that when a pressing force is applied to the compression part, the compression part is compressed, and when the pressing force is removed, the compression part rebounds.

2. The elastic bag according to claim 1, characterized in that: The elastic bag is conical in shape, and the second opening is larger than the first opening.

3. The elastic bag according to claim 1, characterized in that: The first connecting portion includes a first annular surface formed at one end of the compression portion, and a first annular wall formed by the inner edge of the first annular surface protruding outward along the axial direction of the elastic bag, and the end of the first annular wall constructs the first opening. The valve structure includes a first valve cover arranged in the central area of ​​the first opening, and a first connecting rib integrally connecting the first valve cover and the first annular wall, and the first valve cover, the first connecting portion and the first connecting rib construct a first flow channel.

4. The elastic bladder according to claim 1, characterized in that: The elastic bag also includes a second connecting portion constructed at the other end of the compression portion, the second connecting portion includes a second annular surface formed at the other end of the compression portion, and a second annular wall formed by the outer edge of the second annular surface protruding outward along the axial direction of the elastic bag, and the end of the second annular wall constructs the second opening.

5. A compression pump, characterized in that: It includes a fixed seat and a pressing piece connected to the top of the fixed seat for relative movement. The pressing piece and the fixed seat cooperate with each other to form a accommodating space. The accommodating space accommodates the elastic bag according to any one of claims 1 to 4. The first connecting part is connected to the fixed seat to form a lower one-way valve.

6. The pressing pump according to claim 5, characterized in that: The fixing seat is configured with a first through hole, and the valve structure includes a first valve cover arranged at the first opening, and the first valve cover closes or opens the first through hole to isolate or connect the accommodating cavity with the external space of the fixing seat.

7. The pressing pump according to claim 6, characterized in that: The pressing piece is configured with a discharge channel, an upper one-way valve is arranged between the pressing piece and the elastic bag, the upper one-way valve includes a valve seat arranged at the second opening and a valve body arranged at the valve seat, the valve seat is configured with a second through hole, the valve body is configured with a second valve cover, the second valve cover closes or opens the second through hole to seal the accommodating cavity and the discharge channel.

8. The pressing pump according to claim 7, characterized in that: The valve structure includes a first valve cover constructed in the central area of ​​the first opening and a first connecting rib integrally connecting the first valve cover and the first connecting part, the valve body includes a second valve cover arranged in the central area of ​​the valve body and a second connecting rib integrally connecting the second valve cover to the valve body, the hardness of the valve body is greater than the hardness of the valve structure, and under the same pressure, the deformation generated by the first connecting rib is greater than the deformation generated by the second connecting rib.

9. The pressing pump according to claim 7, characterized in that: The elastic bag also includes a second connecting portion constructed at the other end of the compression portion, and the end of the second connecting portion constructs the second opening. The pressing piece also includes a positioning ring and a sleeve formed by cantilevering from the top of the pressing piece to one side of the elastic bag. The valve seat includes an outer annular wall formed by the edge of its bottom protruding toward one side of the pressing piece. The outer annular wall is fitted to the inner wall surface of the second connecting portion and is embedded between the positioning ring and the sleeve together with the second connecting portion.

10. The pressing pump according to claim 5, characterized in that: The pressing member has a discharge port, and a truncation structure is arranged at the discharge port. The truncation structure has at least two intersecting slits, so that the truncation structure is divided into flaps that can be opened and closed.

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