Buffer device for filter bottle and filter bottle

Abstract

The utility model relates to a buffer device for a filter bottle and the filter bottle. The buffer device comprises a main body which comprises a containing cavity, and an opening is formed in one side of the containing cavity; the movable part is arranged in the accommodating cavity and can move in the accommodating cavity; the cover body covers the opening and is fixedly connected with the main body, a through hole is formed in the cover body, the projection of the cover body and the projection of the movable part in the axial direction of the cover body at least partially coincide, and the cover body is used for limiting the movable part in the containing cavity. According to the buffer device for the filter bottle and the filter bottle, the impact of a water hammer phenomenon and icing on the structure of the filter bottle can be effectively relieved, meanwhile, the filter bottle can have good sealing performance, and the service life of the filter bottle can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of a buffer device for a filter bottle and a filter bottle, in particular to a buffer device for a filter bottle and a filter bottle. Background Art

[0002] During the delivery of tap water, a certain amount of impurities such as particulate matter or sediment may be present. Installing a filter bottle in the tap water delivery system can further purify the tap water and improve its quality. The water flow in the tap water piping system may experience drastic changes. For example, when a valve is suddenly closed or opened, the water flow rate will change instantaneously. The resulting pressure wave will be transmitted to the filter bottle, causing large pressure fluctuations within the filter bottle. This is the water hammer effect, which can impact the filter bottle structure. When the water in the pipeline freezes, the volume of the liquid in the filter bottle increases, which may also squeeze the filter bottle, accelerating its aging or damage.

[0003] To solve the problem that the filter bottles are easily damaged due to water hammer or freezing, a buffer device can be set in the filter bottles to absorb the impact force or squeezing force. In the prior art, a through hole is opened at the bottom of the filter bottle body to connect the top of the buffer device, and the assembly seal of the buffer device affects the sealing of the filter bottle itself. If the buffer device is not sealed well or there is a problem with the buffer device, it is easy to cause the entire group of filter bottles to leak. Utility Model Content

[0004] Based on this, it is necessary to provide a buffer device and filter bottle with better sealing performance to address the problem that the existing buffer device may cause poor sealing performance of the filter bottle.

[0005] In a first aspect, a buffer device for a filter bottle is provided, the buffer device comprising:

[0006] The main body includes a receiving cavity, and one side of the receiving cavity has an opening;

[0007] a movable member, disposed inside the accommodating cavity and capable of moving within the accommodating cavity;

[0008] The cover body is detachably connected to the main body, a through hole is provided on the cover body, and the cover body is detachably connected to the accommodating cavity, so as to confine the movable part in the accommodating cavity.

[0009] In one embodiment, the buffer device further includes an elastic member, which is disposed between the movable member and the bottom wall of the accommodating cavity and is used to provide a restoring force for the movable member.

[0010] In one embodiment, a first guide member is provided on the movable member, and a second guide member is provided in the accommodating cavity. The first guide member and the second guide member are slidably fitted together, and the first guide member and the second guide member are used to limit the movement direction of the movable member.

[0011] In one embodiment, the first guide member is a guide rod, the second guide member is a guide column, and the guide column is provided with a guide groove for accommodating the first guide member, or the second guide member is a guide rod, the first guide member is a guide column, and the guide column is provided with a guide groove for accommodating the second guide member.

[0012] In one embodiment, the elastic member includes a spring, and the spring is sleeved on the outside of the first guide member and the second guide member.

[0013] In one embodiment, the buffer device includes a plurality of groups of correspondingly arranged first guide members and second guide members, the elastic member includes a plurality of springs, and each group of the first guide members and the second guide members is provided with a spring.

[0014] In one embodiment, a first positioning groove and a positioning protrusion are provided on the surface of the cover body opposite to the annular connecting part, and the first positioning groove is used to accommodate the annular connecting part. A second positioning groove is provided on the annular connecting part, and the second positioning groove is used to accommodate the positioning protrusion, wherein the radial dimension of the first positioning groove is larger than the radial dimension of the annular connecting part.

[0015] In one embodiment, a positioning groove is provided on the surface of the cover body opposite to the annular connecting portion, and a positioning protrusion is provided on the annular connecting portion. The positioning groove is used to accommodate the positioning protrusion, and the radial dimension of the positioning groove is larger than the radial dimension of the positioning protrusion.

[0016] In one embodiment, a sealing member is provided between the movable member and the inner wall of the accommodating cavity.

[0017] In a second aspect, a filter bottle is provided, wherein the filter bottle is provided with a filter bottle buffer device as described in the first aspect or any one of the first aspects, and the filter bottle buffer device is movably arranged inside the filter bottle.

[0018] The above-mentioned filter bottle buffer device and filter bottle have an opening on one side of the main body receiving chamber, a movable part, which is arranged inside the receiving chamber and can move within the receiving chamber, a cover body covering the opening and fixedly connected to the main body, and a through hole provided on the cover body. When the volume of liquid in the filter bottle increases, the liquid can apply a force to the surface of the movable part through the through hole, and the internal volume of the filter bottle increases through the movement of the movable part, thereby buffering the impact force or pressure on the inside of the filter bottle. The cover body is used to confine the movable part within the receiving chamber, which can limit the range of movement of the movable part while ensuring that the movable part has a certain degree of freedom. The above-mentioned buffer device plays a buffering role against freezing and water hammer phenomena, and does not need to be connected to the external environment, does not affect the sealing of the filter bottle, and can reduce the occurrence of water seepage and leakage. The above-mentioned filter bottle buffer device and filter bottle can effectively alleviate the impact of water hammer and ice on the filter bottle structure, and at the same time can make the filter bottle have better sealing performance, which can increase the service life of the filter bottle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic structural diagram of a buffer device for a filter bottle provided in one embodiment of the present utility model;

[0021] Figure 2 A cross-sectional view of a buffer device for a filter bottle provided in one embodiment of the present utility model;

[0022] Figure 3 A schematic diagram of the assembly relationship between the filter bottle buffer device and the filter bottle provided in one embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the assembly relationship of various components in a buffer device for a filter bottle provided in one embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the assembly relationship between the filter bottle buffer device and the filter bottle provided in one embodiment of the utility model.

[0025] To make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the accompanying symbols are explained as follows:

[0026] 100: Buffer device for filter bottle, 110: Main body, 111: Accommodating chamber, 112: Annular connecting portion, 113: Second fixing hole, 114: Second positioning groove, 115: Second guide member, 120: Movable member, 121: First guide member, 130: Cover body, 131: Through hole, 132: First fixing hole, 133: First positioning groove, 134: Positioning protrusion, 141: Spring, 150: Fixing member, 160: Sealing member, 200: Filter bottle, 210: Limiting structure. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0030] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0033] Water hammer (also known as water hammer) occurs when the flow rate in a pressurized pipeline changes dramatically due to some external factor, causing the internal pressure of the liquid to rise and fall rapidly. This alternating pressure rise and fall acts on the pipe walls, valves, or other components in a manner similar to hammering, hence the name water hammer. If tap water pipelines are exposed to cold outdoor environments or are inadequately insulated, the cold temperature can be transferred into the pipes, causing the water temperature to drop. Once the water temperature drops below freezing, the tap water will freeze. Water hammer and ice formation can impact or squeeze the filter bottle, shortening its lifespan. In the prior art, a through hole is provided at the bottom of the filter bottle body to connect to the top of the buffer mechanism. However, the assembly seal of the buffer mechanism affects the seal of the filter bottle itself. If the buffer mechanism is not sealed properly or has problems, the entire filter bottle assembly can leak. To address this issue, one embodiment of the present invention provides a buffer device 100 for a filter bottle. This effectively mitigates water hammer and the impact of ice formation on the filter bottle structure while ensuring a better seal and extending its service life. Figure 1A schematic structural diagram of a buffer device for a filter bottle provided in one embodiment of the present utility model; Figure 2 A cross-sectional view of a buffer device for a filter bottle provided in one embodiment of the present utility model; Figure 3 This is a schematic diagram of the assembly relationship between the filter bottle and the buffer device provided by one embodiment of the utility model. Figures 1 to 3 An embodiment of the present invention provides a filter bottle buffer device 100, which is movably mounted in a filter bottle and includes:

[0034] The main body 110 includes a receiving chamber 111, and one side of the receiving chamber 111 has an opening;

[0035] The movable member 120 is disposed inside the accommodating cavity 111 and is capable of moving within the accommodating cavity 111;

[0036] The cover 130 is detachably connected to the main body 110 . A through hole 131 is provided on the cover 130 . The cover 130 is used to confine the movable member 120 within the accommodating cavity 111 .

[0037] The cover 130 covers the main body 110, and a receiving cavity 111 is formed between the main body 110 and the cover 130. The receiving cavity 111 can be as follows: Figure 1 As shown, it is a groove structure located on the main body 110. The accommodating cavity 111 is used to accommodate the movable member 120. The volume of the accommodating cavity 111 is larger than the movable member 120, so that the movable member 120 can move in the accommodating cavity 111 under the action of pressure when the water pressure in the filter bottle 200 changes, thereby increasing the space inside the filter bottle 200 to accommodate water, thereby buffering the impact force or pressure on the filter bottle 200. When the water pressure decreases, the movable member 120 can return to its original position, so as to provide a buffering effect when water hammer or ice formation occurs again. On the one hand, the cover 130 serves to restrict the movable part 120 in the accommodating chamber 111 and prevent the movable part 120 from escaping from the opening of the accommodating chamber 111. Therefore, the cover 130 can block the movable part 120. The through hole 131 on the cover 130 can allow the liquid in the filter bottle 200 to flow. When water hammer occurs, the water flow can pass through the through hole 131 to apply pressure on the movable part 120. Under the action of pressure, the movable part 120 moves toward the bottom of the accommodating chamber 111, thereby increasing the space for accommodating liquid inside the filter bottle 200. When ice forms in the bottle, its volume is greater than the volume of water of the same weight. The movable part 120 can also move downward under the action of ice or water flow, thereby increasing the storage space in the bottle and preventing ice from damaging the filter bottle 200.

[0038] The above-mentioned filter bottle buffer device 100 has an opening on one side of the accommodating chamber 111 of the main body 110, and the movable member 120 is arranged inside the accommodating chamber 111 and can move within the accommodating chamber 111. The cover body 130 covers the opening and is fixedly connected to the main body 110. The cover body 130 is provided with a through hole 131. When the volume of the liquid in the filter bottle 200 increases, the liquid can exert a force on the surface of the movable member 120 through the through hole 131. The movement of the movable member 120 increases the internal volume of the filter bottle 200, thereby buffering the impact force or pressure applied to the inside of the filter bottle 200. The cover body 130 is used to confine the movable member 120 in the accommodating chamber 111, which can ensure that the movable member 120 has a certain degree of freedom while limiting the movement range of the movable member 120. The above-mentioned filter bottle buffer device 100 plays a buffering role against freezing and water hammer phenomena without having to be connected to the external environment, and does not affect the sealing of the filter bottle 200, thereby reducing the occurrence of water seepage and leakage. The filter bottle buffer device 100 can effectively alleviate the impact of water hammer and ice formation on the structure of the filter bottle 200, while making the filter bottle 200 have better sealing performance and improving the service life of the filter bottle 200.

[0039] In an exemplary embodiment, the buffer device further includes an elastic member disposed between the movable member 120 and the bottom wall of the accommodating chamber 111 to provide a restoring force for the movable member 120. When the water hammer disappears or the ice in the filter bottle 200 melts, the force applied to the movable member 120 decreases or disappears, and the movable member 120 can return to its initial position under the restoring force of the elastic member, thereby providing a buffering effect again when the water hammer or ice formation reappears. The elastic member can be a spring 141 or other elastically deformable element. Each buffer device can include multiple elastic members to provide a uniform restoring force for the movable member 120.

[0040] In one embodiment, a first guide member 121 is provided on the movable member 120, and a second guide member 115 is provided in the accommodating cavity 111. The first guide member 121 and the second guide member 115 are slidably engaged and are used to limit the movement direction of the movable member 120. The first guide member 121 and the second guide member 115 cooperate with each other so that the movable member 120 can only move in a preset direction relative to the accommodating cavity 111, thereby preventing the movable member 120 from deflecting or getting stuck during movement, thereby enabling smooth reciprocating motion. The first guide member 121 and the second guide member 115 can be configured as different structures according to actual needs, such as a guide sleeve and guide rod, a slider and slide rail, a ball guide rail and ball sleeve, etc., as long as they can achieve the guidance of the movable member 120.

[0041] In one embodiment, the first guide member 121 is a guide rod, and the second guide member 115 is a guide post. The guide post is provided with a guide groove for accommodating the first guide member 121. Alternatively, the second guide member 115 is a guide rod, the first guide member 121 is a guide post, and the guide post is provided with a guide groove for accommodating the second guide member 115. The diameter of the guide post is larger than the diameter of the guide rod. The guide post is circumferentially defined with a guide groove, and the guide rod is inserted into the guide groove. When the movable member 120 is pressed toward the inner wall of the filter bottle 200, the guide rod can move along the guide groove, reducing the distance between the movable member 120 and the bottom of the filter bottle 200. When water hammer occurs or ice melts, the volume of water in the filter bottle 200 decreases, and the movable member 120 returns to its original position under the restoring force of the spring 141. The guide rod can then move along the guide groove and return to its original position.

[0042] In one embodiment, the elastic member includes a spring 141, which is sleeved outside the first guide member 121 and the second guide member 115. The spring 141 can store and release energy within a large deformation range, has good fatigue resistance, and is easy to install and remove. When the spring 141 is sleeved outside the first guide member 121 and the second guide member 115, the first guide member 121 and the second guide member 115 can limit the lateral movement of the spring 141, allowing the spring 141 to maintain axial operation during compression and reset, ensuring that the force direction of the spring 141 is always consistent with the axis of the first guide member 121 and the second guide member 115. This allows the movable member 120 to accurately return to its initial position after reset, making the reset process more precise.

[0043] In one embodiment, the buffer device includes a plurality of correspondingly arranged first guide members 121 and second guide members 115, and the elastic member includes a plurality of springs 141. Each set of first guide members 121 and second guide members 115 is provided with a spring 141. Figure 1 As shown, the buffer device includes five groups of first guide members 121 and second guide members 115 that cooperate with each other. Providing multiple groups of first guide members 121 and second guide members 115 and multiple springs 141 can make the elastic force exerted on the movable member 120 more uniform, and the spring 141 is less likely to deviate during compression or reset.

[0044] In one embodiment, the radial dimension of the cover 130 is larger than the radial dimension of the main body 110, and the edge of the main body 110 is provided with an annular connecting portion 112. The cover 130 is provided with a first fixing hole 132, and the annular connecting portion 112 is provided with a second fixing hole 113. The first fixing hole 132 and the second fixing hole 113 are used to pass through a fixing member 150, and the fixing member 150 is used to connect the cover 130 and the main body 110. Figure 1As shown, the cross-sectional shapes of the cover body 130 and the main body 110 can both be circular, and a plurality of first fixing holes 132 are evenly arranged near the edge of the cover body 130, and an annular connecting portion 112 is provided at the edge of the main body 110, and a plurality of second fixing holes 113 are evenly arranged along the edge of the annular connecting portion 112. The positions and radial dimensions of the first fixing holes 132 and the second fixing holes 113 correspond to each other, and the first fixing holes 132 and the second fixing holes 113 can be through holes 131 or threaded holes, and the fixation between the cover body 130 and the main body 110 can be achieved by fasteners 150 such as bolts and nuts.

[0045] In one embodiment, the surface of the cover 130 opposite to the annular connecting portion 112 is provided with a first positioning groove 133 and a positioning protrusion 134, wherein the first positioning groove 133 is used to accommodate the annular connecting portion 112, and the annular connecting portion 112 is provided with a second positioning groove 114, and the second positioning groove 114 is used to accommodate the positioning protrusion 134, wherein the radial dimension of the first positioning groove 133 is greater than the radial dimension of the annular connecting portion 112. Figure 2 As shown, two annular protrusions are provided on the lower surface of the cover 130, with a first positioning groove 133 formed between the two protrusions. The first positioning groove 133 is used to accommodate the annular connecting portion 112. The annular connecting portion 112 is provided with a second positioning groove 114. The size of the second positioning groove 114 is adapted to the size of the positioning protrusion 134, so that the positioning protrusion 134 is accommodated in the second positioning groove 114 after the cover 130 and the main body 110 are assembled. This can make the assembly positioning of the cover 130 and the main body 110 more precise and prevent radial relative displacement between the cover 130 and the main body 110. The second fixing hole 113 can be provided on the annular connecting portion 112. In this way, it is easier to align the first fixing hole 132 and the second fixing hole 113 when the cover 130 and the main body 110 are assembled, which can speed up the assembly process.

[0046] In one embodiment, a sealing member 160 is provided between the movable member 120 and the inner wall of the accommodating chamber 111. The sealing member 160 may be a sealing ring or a gasket, for example Figures 1 to 2 As shown, a groove may be provided on the outer wall of the movable part 120 or the inner wall of the accommodating cavity 111, and the sealing ring is installed in the groove. Multiple grooves may be provided in parallel to improve the sealing effect. The preparation material may include one or more materials such as fluororubber, silicone nitrile rubber (NBR), and ethylene propylene diene monomer (EPDM).

[0047] Figure 4 A schematic diagram of the assembly relationship of various components in a buffer device for a filter bottle provided in one embodiment of the utility model; Figure 5 This is a schematic diagram of the assembly relationship between the filter bottle buffer device and the filter bottle provided in one embodiment of the utility model. Figures 4 and 5 As shown, in some embodiments of the present application, a filter bottle 200 is further provided, in which a filter bottle buffer device 100 as described in the first aspect or any one of the first aspects is provided, and the filter bottle buffer device 100 is movably provided inside the filter bottle 200. The filter bottle buffer device 100 is movably provided inside the filter bottle 200, and when ice forms inside the filter bottle or water flow fluctuates, the filter bottle buffer device 100 can also move accordingly to play a buffering role. Figure 3 As shown, the limiting structure 210 can be a raised structure evenly distributed along the bottom of the side wall of the filter bottle 200. The raised structure supports and limits the buffer device from multiple directions. The radial dimension of the raised structure is slightly larger than the radial dimension of the buffer device, so that the buffer device can be smoothly installed in place. In other embodiments, the assembly relationship between the buffer device and the filter bottle 200 can also be adjusted according to actual needs. For example, a fixing member 150 can be provided in the filter bottle 200 to fix the buffer device. For example, the buffer device can be installed in conjunction with the filter bottle 200 through a buckle, a slot or other structure. In the actual assembly process, Figure 4 and Figure 5 As shown, first, the various components are assembled into the buffer device 100 , and then the buffer device 100 is installed in the filter bottle 200 and is limited by the limiting structure 210 .

[0048] In some embodiments, the bottom of the filter bottle 200 is curved, and the bottom surface of the buffer device is also curved. When the buffer device is installed in the filter bottle 200, the bottom surface of the buffer device and the bottom surface of the filter bottle 200 are in contact with each other, which can improve the stability of the two and reduce the shaking of the buffer device in the filter bottle 200. When the bottom of the filter bottle 200 has other shapes, the bottom surface of the buffer device can also be adaptively adjusted according to the shape of the bottom of the filter bottle 200 to improve the stability of the assembly.

[0049] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A buffer device for a filter bottle, characterized in that: The buffer device comprises: The main body (110) comprises a receiving cavity (111), wherein one side of the receiving cavity (111) has an opening; A movable member (120) is disposed inside the accommodating cavity (111) and is capable of moving within the accommodating cavity (111); The cover body (130) is detachably connected to the main body (110), and a through hole (131) is provided on the cover body (130) for confining the movable part (120) within the accommodating cavity (111).

2. The buffer device for filter bottle according to claim 1, characterized in that: The buffer device further comprises an elastic member, which is arranged between the movable member (120) and the bottom wall of the accommodating cavity (111) and is used to provide a reset force for the movable member (120).

3. The buffer device for filter bottle according to claim 2, characterized in that: A first guide member (121) is provided on the movable member (120), and a second guide member (115) is provided in the accommodating cavity (111). The first guide member (121) and the second guide member (115) are slidably matched, and the first guide member (121) and the second guide member (115) are used to limit the movement direction of the movable member (120).

4. The buffer device for filter bottle according to claim 3, characterized in that: The first guide member (121) is a guide rod, the second guide member (115) is a guide column, and a guide groove for accommodating the first guide member (121) is provided on the guide column, or the second guide member (115) is a guide rod, the first guide member (121) is a guide column, and a guide groove for accommodating the second guide member (115) is provided on the guide column.

5. The buffer device for filter bottle according to claim 3, characterized in that: The elastic member comprises a spring (141), and the spring (141) is sleeved on the outside of the first guide member (121) and the second guide member (115).

6. The buffer device for filter bottle according to claim 5, characterized in that: The buffer device comprises a plurality of groups of correspondingly arranged first guide members (121) and second guide members (115), the elastic member comprises a plurality of springs (141), and each group of the first guide members (121) and the second guide members (115) is provided with a spring (141) sleeved on the outside.

7. The buffer device for filter bottle according to claim 1, characterized in that: The radial dimension of the cover body (130) is greater than the radial dimension of the main body (110); an annular connecting portion (112) is provided on the edge of the main body (110); a first fixing hole (132) is provided on the cover body (130); a second fixing hole (113) is provided on the annular connecting portion (112); the first fixing hole (132) and the second fixing hole (113) are used to pass a fixing member (150); and the fixing member (150) is used to connect the cover body (130) and the main body (110).

8. The buffer device for filter bottle according to claim 7, characterized in that: A first positioning groove (133) and a positioning protrusion (134) are provided on the surface of the cover body (130) opposite to the annular connecting portion (112), wherein the first positioning groove (133) is used to accommodate the annular connecting portion (112), and a second positioning groove (114) is provided on the annular connecting portion (112), wherein the second positioning groove (114) is used to accommodate the positioning protrusion (134), wherein the radial dimension of the first positioning groove (133) is greater than the radial dimension of the annular connecting portion (112).

9. The buffer device for filter bottle according to claim 1, characterized in that: A sealing member (160) is provided between the movable member (120) and the inner wall of the accommodating cavity (111).

10. A filter bottle, characterized in that: The filter bottle (200) is provided with a filter bottle buffer device according to any one of claims 1 to 9, and the filter bottle buffer device is movably provided inside the filter bottle.

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