Foot pad and water purifier

Abstract

The foot pad comprises a vibration reduction body installed on a shell, the vibration reduction body comprises a first-stage vibration reduction face and a second-stage vibration reduction face, the shell is provided with a first contact face and a second contact face, the first-stage vibration reduction face abuts against the first contact face, and the second-stage vibration reduction face has an initial state and an abutting state abutting against the second contact face. In the initial state, a vibration reduction gap exists between the second-stage vibration reduction face and the second contact face. The water purifier comprises a shell and a foot pad arranged at the bottom of the shell. The foot pad comprises the vibration reduction body provided with the first-stage vibration reduction face and the second-stage vibration reduction face, when the shell is subjected to vibration and transmits vibration to the vibration reduction body, the vibration is transmitted to the vibration reduction body through the first contact face and the first-stage vibration reduction face which abut against each other, the vibration is subjected to kinetic energy reduction in the transmission process, preliminary vibration reduction is achieved, and the vibration reduction effect is improved. Along with continuous vibration, the first-stage vibration reduction face is stressed and compressed to deform, so that the second contact face abuts against the second-stage vibration reduction face, and vibration is greatly weakened.

Description

Technical Field

[0001] The present application belongs to the technical field of water purification equipment, and specifically relates to a foot pad and a water purifier. Background Art

[0002] In recent years, with the rapid development of China's economy, people's desire to improve the quality of life has become increasingly high. Water purifiers were born under this situation and have been widely used by people. With the increase in people's demand for use, higher requirements have been put forward for the displacement of water purifiers. Taking RO water purifiers as an example, a booster pump is usually used to pressurize tap water and pass it through the RO membrane to achieve the filtration and purification of tap water. If you want to increase the flow rate of purified water, you need to increase the power of the booster pump to increase the purification speed of tap water. The increase in the power of the booster pump is accompanied by greater vibration of the water purifier. The vibration of the water purifier body will also bring greater noise, which will disturb people when using it and affect the user experience. Utility Model Content

[0003] The present application provides a foot pad and a water purifier to solve the technical problems of high noise and vibration of traditional water purifiers, especially high-power water purifiers.

[0004] The technical solution adopted in this application is:

[0005] A foot pad includes a vibration-damping body installed on an outer shell, the vibration-damping body includes a primary vibration-damping surface and a secondary vibration-damping surface, the outer shell has a first contact surface and a second contact surface, the primary vibration-damping surface abuts against the first contact surface, the secondary vibration-damping surface has an initial state and an abutting state abutting against the second contact surface, and in the initial state, there is a vibration-damping gap between the secondary vibration-damping surface and the second contact surface.

[0006] The foot pad described in this application also includes the following additional technical features:

[0007] The vibration damping body includes an inner vibration damping part and an outer vibration damping ring arranged around the inner vibration damping part, the primary vibration damping surface is located on the upper surface of the inner vibration damping part, and the secondary vibration damping surface is located on the upper surface of the outer vibration damping ring.

[0008] The outer shell is provided with a protruding positioning ring rib, and a positioning groove adapted to the inner vibration damping part is formed in the positioning ring rib;

[0009] In the initial state, the outer vibration damping ring is located outside the positioning groove, and the vibration damping gap exists between the secondary vibration damping surface and the bottom wall of the positioning ring rib.

[0010] The inner vibration damping portion is provided with an introduction surface along its circumference, and at least a partial area of ​​the introduction surface abuts against the inner wall of the positioning ring rib.

[0011] The shell is provided with a through exhaust hole, and the exhaust hole is located on the inner side of the positioning ring rib.

[0012] The thickness of the inner vibration damping portion is greater than the thickness of the outer vibration damping ring.

[0013] The contact area between the primary vibration-damping surface and the first contact surface is S1, and the contact area between the secondary vibration-damping surface and the second contact surface is S2; S1 and S2 satisfy: S1>S2.

[0014] A plurality of vibration-damping protrusions are arranged on a side of the vibration-damping body away from the shell, and a groove is formed between two adjacent vibration-damping protrusions.

[0015] The foot pad also includes a positioning protrusion connected to the vibration damping body, the shell is provided with a positioning through hole adapted to the positioning protrusion, the positioning protrusion has a connecting section connected to the vibration damping body via the positioning through hole and a clamping portion located inside the shell and cooperating with the shell stopper.

[0016] The present application also provides a water purifier, comprising a shell and a foot pad arranged at the bottom of the shell, wherein the foot pad is the foot pad as described above, and the water purifier is in contact with a placement table through the foot pad.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0018] 1. The foot pad of the present application includes a vibration-damping body having a primary vibration-damping surface and a secondary vibration-damping surface. When the outer shell is subjected to vibration and transmits the vibration to the vibration-damping body, the vibration is first transmitted to the vibration-damping body through the first contact surface and the primary vibration-damping surface abutting against each other. The vibration undergoes kinetic energy reduction during the transmission process to achieve preliminary vibration reduction. Since there is a vibration-damping gap between the secondary vibration-damping surface and the second contact surface in the initial state, the secondary vibration-damping surface and the second contact surface will not contact each other at the first time when the outer shell vibrates. As the vibration continues, the primary vibration-damping surface is compressed and deformed, so that the second contact surface abuts against the secondary vibration-damping surface. At this time, the vibration is transmitted to the vibration-damping body through the second contact surface and the secondary vibration-damping surface abutting against each other. The primary vibration-damping surface and the secondary vibration-damping surface of the vibration-damping body work synchronously to achieve secondary vibration reduction of the outer shell. After two reductions and buffering, the kinetic energy of the vibration is greatly reduced, thereby achieving a significant weakening of the vibration by the foot pad, thereby reducing the vibration transmission to the placement table of the machine during the operation of the machine using the foot pad, thereby improving the noise reduction effect.

[0019] 2. As a preferred embodiment of the present application, the vibration damping body is configured to include an inner vibration damping part and an outer vibration damping ring arranged around the inner vibration damping part. When the vibration on the outer shell is initially transmitted to the inner vibration damping part through the first contact surface and the primary vibration damping surface abutting each other, the outer vibration damping ring surrounding the inner vibration damping part on the outer circumference can uniformly absorb the vibration in the inner vibration damping part, thereby avoiding the occurrence of excessive local deformation, displacement, and the like caused by uneven vibration transmission in the inner vibration damping part.

[0020] 3. As a preferred embodiment of the present application, by providing a positioning ring rib and forming a positioning groove adapted to the inner vibration damping part in the positioning ring rib, an installation space for installing the vibration damping body is provided for the outer shell, so that the vibration damping body can be connected to the outer shell by installing the inner vibration damping part in the positioning groove. At the same time, the outer vibration damping ring is provided on the outside of the positioning groove, which can effectively reduce the possibility that a part of the area of ​​the outer vibration damping ring enters the positioning groove when the second contact surface abuts the secondary vibration damping surface and the deformation occurs, thereby reducing the interference of the outer vibration damping ring deformation on the inner vibration damping part located in the positioning groove, thereby providing a guarantee for the connection stability between the vibration damping body and the outer shell.

[0021] 4. As a preferred embodiment of the present application, the inner vibration damping part is provided with an introduction surface along its circumference, and at least part of the introduction surface abuts against the inner wall of the positioning ring rib. Such a configuration, on the one hand, provides a guide for the installation of the inner vibration damping part, and the abutment and cooperation between the introduction surface and the inner wall of the positioning ring rib guides the inner vibration damping part to be embedded in the positioning groove, thereby reducing the difficulty of installing the vibration damping body; on the other hand, when the vibration of the outer shell is transmitted to the inner vibration damping part, it will inevitably cause the vibration displacement of the inner vibration damping part itself. During the displacement process, the inner vibration damping part causes the introduction surface to rub against the inner wall of the positioning ring rib, thereby converting part of the motion caused by the vibration into heat energy generated by friction, that is, increasing the conversion channel of vibration energy, thereby achieving the effect of rapidly attenuating vibration.

[0022] 5. As a preferred embodiment of the present application, a plurality of vibration-damping protrusions are provided on the side of the vibration-damping body away from the shell, and a groove is formed between two adjacent vibration-damping protrusions. This arrangement reduces the contact area between the vibration-damping body and the external vibration receiving body, thereby increasing the pressure between the vibration-damping body and the external vibration receiving body when the vibration-damping body is deformed by the vibration, thereby increasing the deformation amount of the vibration-damping protrusion, that is, increasing the deformation amount of the vibration-damping body under the same vibration, so that the vibration-damping body has a stronger vibration-damping effect under the action of large-scale deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 An exploded view of the foot pad and the housing in one embodiment of the present application;

[0025] Figure 2 This is a schematic structural diagram of a foot pad according to an embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of the structure of the lower housing in one embodiment of the present application;

[0027] Figure 4 for Figure 3 A magnified view of part A;

[0028] Figure 5 This is a cross-sectional view of the structure of the lower foot pad and the outer shell part according to one embodiment of the present application;

[0029] Figure 6 for Figure 5 Enlarged view of part B.

[0030] List of reference numerals:

[0031] 1 housing, 11 first contact surface, 12 second contact surface, 13 positioning ring rib, 131 positioning groove, 14 positioning through hole, 15 exhaust hole;

[0032] 2 foot pad, 21 primary vibration reduction surface, 22 secondary vibration reduction surface, 23 inner vibration reduction portion, 231 introduction surface, 24 outer vibration reduction ring, 25 vibration reduction protrusion;

[0033] 3 positioning protrusion, 31 connecting section, 32 clamping portion;

[0034] 4Vibration damping clearance. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0037] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 on the present application.

[0038] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0040] like Figures 1 to 6 As shown, a foot pad includes a vibration-damping body installed on a shell 1, the vibration-damping body includes a primary vibration-damping surface 21 and a secondary vibration-damping surface 22, the shell 1 has a first contact surface 11 and a second contact surface 12, the primary vibration-damping surface 21 abuts against the first contact surface 11, the secondary vibration-damping surface 22 has an initial state and an abutting state abutting against the second contact surface 12, in the initial state, there is a vibration-damping gap 4 between the secondary vibration-damping surface 22 and the second contact surface 12.

[0041] The foot pad of the present application includes a vibration-damping body having a primary vibration-damping surface 21 and a secondary vibration-damping surface 22. When the outer shell 1 is subjected to vibration and transmits the vibration to the vibration-damping body, the vibration is first transmitted to the vibration-damping body through the first contact surface 11 and the primary vibration-damping surface 21 abutting against each other. The vibration undergoes kinetic energy reduction during the transmission process to achieve preliminary vibration reduction. Since there is a vibration-damping gap 4 between the secondary vibration-damping surface 22 and the second contact surface 12 in the initial state, the secondary vibration-damping surface 22 and the second contact surface 12 will not contact each other when the outer shell 1 vibrates for the first time. As the vibration continues, the primary vibration-damping surface 22 and the second contact surface 12 will not contact each other. The vibration-damping surface 21 is compressed and deformed by the force, so that the second contact surface 12 abuts against the secondary vibration-damping surface 22. At this time, the vibration is transmitted to the vibration-damping body through the second contact surface 12 and the secondary vibration-damping surface 22 abutting against each other. The primary vibration-damping surface 21 and the secondary vibration-damping surface 22 of the vibration-damping body work synchronously to realize the secondary vibration reduction of the outer shell 1. The kinetic energy of the vibration is greatly reduced after two reductions and buffering, thereby realizing a significant weakening of the vibration by the foot pad, thereby reducing the vibration transmission to the placement table of the machine placed with the foot pad 2 during the operation of the machine, thereby improving the noise reduction effect.

[0042] The present application does not limit the arrangement of the primary vibration-damping surface 21 and the secondary vibration-damping surface 22, and any of the following embodiments may be adopted:

[0043] Embodiment 1: The vibration damping body includes an inner vibration damping part 23 and an outer vibration damping ring 24 arranged around the inner vibration damping part 23 , the primary vibration damping surface 21 is located on the upper surface of the outer vibration damping ring 24 , and the secondary vibration damping surface 22 is located on the upper surface of the inner vibration damping part 23 .

[0044] Implementation method 2: Figure 2 As shown, the vibration damping body includes an inner vibration damping part 23 and an outer vibration damping ring 24 arranged around the inner vibration damping part 23, the primary vibration damping surface 21 is located on the upper surface of the inner vibration damping part 23, and the secondary vibration damping surface 22 is located on the upper surface of the outer vibration damping ring 24. The vibration damping body is configured to include the inner vibration damping part 23 and the outer vibration damping ring 24 arranged around the inner vibration damping part 23. When the vibration on the housing 1 is initially transmitted to the inner vibration damping part 23 through the first contact surface 11 and the primary vibration damping surface 21 abutting against each other, the outer vibration damping ring 24 surrounding the inner vibration damping part 23 on the outer circumference can uniformly absorb the vibration in the inner vibration damping part 23, thereby avoiding the occurrence of excessive local deformation, displacement, and the like caused by uneven vibration transmission in the inner vibration damping part 23.

[0045] As a preferred embodiment of the second implementation mode, Figure 4As shown, the outer shell 1 is provided with a protruding positioning ring rib 13, and a positioning groove 131 adapted to the inner vibration damping part 23 is formed in the positioning ring rib 13; in the initial state, the outer vibration damping ring 24 is located on the outside of the positioning groove 131, and the vibration damping gap 4 exists between the secondary vibration damping surface 22 and the bottom wall of the positioning ring rib 13. By providing a positioning ring rib 13 and forming a positioning groove 131 adapted to the inner vibration damping part 23 in the positioning ring rib 13, an installation space for installing the vibration damping body is provided for the outer shell 1, so that the vibration damping body can be connected to the outer shell 1 by installing the inner vibration damping part 23 in the positioning groove 131, and at the same time, the outer vibration damping ring 24 is arranged on the outside of the positioning groove 131, which can effectively reduce the possibility that a part of the outer vibration damping ring 24 enters the positioning groove 131 when the second contact surface 12 abuts against the secondary vibration damping surface 22 and the outer vibration damping ring 24 is deformed, thereby reducing the interference of the inner vibration damping part 23 located in the positioning groove 131 with the deformation of the outer vibration damping ring 24, thereby providing a guarantee for the connection stability between the vibration damping body and the outer shell 1.

[0046] This embodiment does not limit the positional relationship between the inner vibration damping portion 23 and the positioning ring rib 13, and can adopt any of the following examples:

[0047] Example 1: There is a deformation gap between the outer wall of the inner vibration damping part 23 and the inner wall of the positioning ring rib 13. In this way, when the inner vibration damping part 23 is deformed by extrusion, the existence of the deformation gap reserves a certain deformation space for the inner vibration damping part 23, reduces the possibility of the inner vibration damping part 23 being crushed by extrusion, and helps to improve the service life of the inner vibration damping part 23.

[0048] Example 2: Figure 2 As shown, the inner vibration damping part 23 is provided with an introduction surface 231 along its circumference, and at least a part of the introduction surface 231 abuts against the inner wall of the positioning ring rib 13. Such a configuration, on the one hand, provides a guide for the installation of the inner vibration damping part 23, and the introduction surface 231 abuts against the inner wall of the positioning ring rib 13 to guide the inner vibration damping part 23 to be embedded in the positioning groove 131, thereby reducing the difficulty of installing the vibration damping body; on the other hand, when the vibration of the outer shell 1 is transmitted to the inner vibration damping part 23, it will inevitably cause the vibration displacement of the inner vibration damping part 23 itself. During the displacement process, the inner vibration damping part 23 causes the introduction surface 231 to rub against the inner wall of the positioning ring rib 13, thereby converting part of the motion brought by the vibration into the heat energy generated by the friction, that is, increasing the conversion channel of the vibration energy, thereby achieving the effect of rapidly attenuating the vibration.

[0049] As another preferred embodiment under the second embodiment, Figure 4As shown, the housing 1 is provided with a through exhaust hole 15, and the exhaust hole 15 is located on the inner side of the positioning ring rib 13. The exhaust hole 15 is used to connect the positioning groove 131 with the internal space of the housing 1, so that when the inner vibration damping part 23 is assembled into the positioning groove 131, the gas in the positioning groove 131 is squeezed into the interior of the housing 1 through the exhaust hole, which, on the one hand, facilitates the assembly of the foot pad 2 and reduces the assembly resistance, and on the other hand, the gas in the positioning groove 131 can be squeezed out, so that the primary vibration damping surface 21 and the first contact surface 11 can achieve good contact, and avoid gas retention and exhaust noise during vibration.

[0050] As another preferred embodiment under the second embodiment, Figure 5 As shown, the thickness of the inner vibration damping portion 23 is greater than the thickness of the outer vibration damping ring 24 . Figure 5 H1 shown in is the thickness of the inner vibration damping part 23, and H2 refers to the thickness of the outer vibration damping ring 24. Since the primary vibration damping surface 21 is always in contact with the first contact surface 11, the vibration shock to the inner vibration damping part 23 is greater than that to the outer vibration damping ring 24. Therefore, setting the thickness of the inner vibration damping part 23 to be greater than the thickness of the outer vibration damping ring 24 can increase the impact resistance of the inner vibration damping part 23 and reduce the possibility of the inner vibration damping part 23 being crushed by the vibration shock. In addition, the thickness of the inner vibration damping part 23 is relatively large, so that the deformation of the inner vibration damping part 23 after being subjected to the vibration shock is larger, so that the force acting on the housing 1 is larger, and then it can play a more buffering and vibration absorbing role in the process of primary vibration damping, thereby improving the vibration damping effect.

[0051] As a preferred embodiment of the present application, the contact area between the primary vibration damping surface 21 and the first contact surface 11 is S1, and the contact area between the secondary vibration damping surface 22 and the second contact surface 12 is S2; S1 and S2 satisfy: S1>S2. Since the primary vibration damping surface 21 and the first contact surface 11 are always in contact, most of the vibration is transmitted through the abutment between the primary vibration damping surface 21 and the first contact surface 11. S1 is set to be greater than S2, so that the primary vibration damping surface 21 and the first contact surface 11 have a larger contact area, providing a larger transmission surface for vibration, reducing the large amount of vibration potential energy gathered at the abutment between the first contact surface 11 and the primary vibration damping surface 21, thereby reducing the bearing pressure of the vibration damping body, which helps to improve the service life of the vibration damping body.

[0052] As a preferred embodiment of the present application, Figure 2As shown, a plurality of vibration-damping protrusions 25 are provided on the side of the vibration-damping body away from the housing 1, and a groove is formed between two adjacent vibration-damping protrusions 25. Such a configuration reduces the contact area between the vibration-damping body and the external vibration receiving body, thereby increasing the pressure between the vibration-damping body and the external vibration receiving body when the vibration-damping body is deformed by the vibration, thereby increasing the deformation amount of the vibration-damping protrusion 25, that is, increasing the deformation amount of the vibration-damping body under the same vibration, so that the vibration-damping body has a stronger vibration-damping effect under the large deformation. Specifically, the vibration-damping protrusion 25 can be made of materials such as rubber, deformable soft plastic, etc., so that the vibration-damping protrusion 25 has elastic deformation ability.

[0053] It should be noted that the present embodiment does not limit the arrangement of the vibration-damping protrusions 25. In one embodiment, the vibration-damping protrusions 25 are distributed in a dotted manner on the side of the vibration-damping body away from the housing 1, and the vibration-damping protrusions 25 are independent of each other to form a plurality of grooves. In another embodiment, the vibration-damping protrusions 25 are distributed in a strip-like manner on the side of the vibration-damping body away from the housing 1 and are parallel to each other, and a groove is formed between two adjacent vibration-damping protrusions 25. In yet another embodiment, the vibration-damping protrusions 25 are distributed in a strip-like manner on the side of the vibration-damping body away from the housing 1 and cross each other, and a groove is formed between two or more adjacent vibration-damping protrusions 25.

[0054] The present application does not limit the structural form of the vibration-damping body. In another embodiment, a planar vibration-damping surface is provided on a side of the vibration-damping body away from the housing 1 .

[0055] As a preferred embodiment of the present application, Figure 2 As shown, the foot pad 2 also includes a positioning protrusion 3 connected to the vibration damping body, the housing 1 is provided with a positioning through hole 14 adapted to the positioning protrusion 3, and the positioning protrusion 3 has a connecting section 31 connected to the vibration damping body via the positioning through hole 14 and a clamping section 32 located inside the housing 1 and matched with the stopper of the housing 1. Specifically, the outer diameter of one end of the clamping section 32 abutting against the housing 1 is larger than the inner diameter of the positioning through hole 14, and the clamping section 32 undergoes a certain elastic deformation when inserted into the positioning through hole 14, and the vibration damping body is connected to the housing 1 by the interference fit between the connecting section 31 and the positioning through hole 14.

[0056] In another embodiment, the vibration-damping body is provided with a first positioning hole, the housing 1 is provided with a second positioning hole, and the vibration-damping body is fixedly connected to the housing 1 by a fastener passing through the first positioning hole and the second positioning hole.

[0057] A water purifier comprises a housing 1 and a foot pad 2 arranged at the bottom of the housing 1, wherein the foot pad 2 is the foot pad 2 described above, and the water purifier contacts a placement table through the foot pad 2. The vibration generated by the water purifier of the present application is greatly reduced after being weakened and absorbed by the foot pad 2, so the vibration transmitted to the placement table is small, and the relative vibration frequency between the water purifier and the placement table is low, which helps to reduce the working noise of the water purifier.

[0058] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0059] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0060] The above is only the embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A foot pad, comprising a vibration-damping body mounted on a housing, characterized in that: The vibration damping body includes a primary vibration damping surface and a secondary vibration damping surface, the shell has a first contact surface and a second contact surface, the primary vibration damping surface abuts against the first contact surface, the secondary vibration damping surface has an initial state and an abutting state abutting against the second contact surface, and in the initial state, there is a vibration damping gap between the secondary vibration damping surface and the second contact surface.

2. A foot pad according to claim 1, characterized in that: The vibration damping body includes an inner vibration damping part and an outer vibration damping ring arranged around the inner vibration damping part, the primary vibration damping surface is located on the upper surface of the inner vibration damping part, and the secondary vibration damping surface is located on the upper surface of the outer vibration damping ring.

3. A foot pad according to claim 2, characterized in that: The outer shell is provided with a protruding positioning ring rib, and a positioning groove adapted to the inner vibration damping part is formed in the positioning ring rib; In the initial state, the outer vibration damping ring is located outside the positioning groove, and the vibration damping gap exists between the secondary vibration damping surface and the bottom wall of the positioning ring rib.

4. A foot pad according to claim 3, characterized in that: The inner vibration damping portion is provided with an introduction surface along its circumference, and at least a partial area of ​​the introduction surface abuts against the inner wall of the positioning ring rib.

5. A foot pad according to claim 3, characterized in that: The shell is provided with a through exhaust hole, and the exhaust hole is located on the inner side of the positioning ring rib.

6. A foot pad according to claim 2, characterized in that: The thickness of the inner vibration damping portion is greater than the thickness of the outer vibration damping ring.

7. The foot pad according to claim 1, characterized in that: The contact area between the primary vibration-damping surface and the first contact surface is S1, and the contact area between the secondary vibration-damping surface and the second contact surface is S2; S1 and S2 satisfy: S1>S2.

8. The foot pad according to claim 1, characterized in that: A plurality of vibration-damping protrusions are arranged on a side of the vibration-damping body away from the shell, and a groove is formed between two adjacent vibration-damping protrusions.

9. The foot pad according to claim 1, characterized in that: The foot pad also includes a positioning protrusion connected to the vibration damping body, the shell is provided with a positioning through hole adapted to the positioning protrusion, the positioning protrusion has a connecting section connected to the vibration damping body via the positioning through hole and a clamping portion located inside the shell and cooperating with the shell stopper.

10. A water purifier, comprising a housing and a foot pad arranged at the bottom of the housing, characterized in that: The foot pad is the foot pad as described in any one of claims 1 to 9, and the water purifier is in contact with the placement table through the foot pad.

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