Snap and valve device having the same

Abstract

A snap and a valve device having the same, wherein the snap includes a connecting portion and a fixing portion provided on the connecting portion, the fixing portion includes a snap assembly and a restricting member, the restricting member has a connecting end and a free end provided opposite each other, the connecting end of the restricting member is connected to the snap assembly, and the free end of the restricting member is located outside the snap assembly and directly faces the surface facing the connecting portion of the snap assembly, thereby solving the problem that it is difficult to connect the coil portion to the valve seat.

Description

[Technical Field]

[0001] This application claims priority to a patent application filed with the State Intellectual Property Office of China on December 20, 2022, bearing application number 202223427325.7 and entitled "Snap and valve device having the same."

[0002] FIELD OF THE INVENTION This application relates to the technical field of valve devices, and more particularly to snaps and valve devices having the same. [Background technology]

[0003] Currently, a valve device mainly includes a valve seat, a valve body, and a coil section, and the coil section can generate a magnetic field, which drives and moves a valve head inside the valve body to open and close the valve port. However, in the prior art, when installing the coil section, a fastening member such as a screw must be used to connect the coil section and the valve seat, which requires operations such as aligning screw holes and tightening the screws, resulting in low assembly efficiency of the valve device. Summary of the Invention

[0004] The present application provides a snap and a valve device having the same for solving the problem of the prior art that the coil portion is difficult to connect to the valve seat.

[0005] According to one aspect of the present application, a snap is provided, which includes a connecting portion and a fixing portion provided on the connecting portion, the fixing portion including a snap assembly and a restricting member, the restricting member having a connecting end and a free end provided opposite to each other, the connecting end of the restricting member being connected to the snap assembly, and the free end of the restricting member being located outside the snap assembly and facing the surface toward the connecting portion of the snap assembly.

[0006]

[0006] When the technical aspects of the present application are applied, the coil portion is disposed in the connection portion, and the snap assembly is engaged with the valve seat. When installing the snap, the restricting member is first aligned, and then the snap assembly is fixed to the valve seat. This reduces the difficulty of installing the snap and makes it easier to install the snap. This also prevents the coil portion from falling off upward, and the restricting member prevents the coil portion from rotating around the axial direction of the valve seat during operation. By adopting the above structure, when installing the coil portion, cumbersome steps such as aligning the screw holes and tightening the screws can be avoided, thereby improving the installation efficiency of the coil portion and the valve seat.

[0007] The snap assembly further includes a connecting plate connected to the connecting portion, the connecting plate is provided with a hook, and the bent portion of the hook is located on one side toward the connecting portion of the connecting plate. This design makes it easy to connect the hook to the valve seat and ensures the connection and fastening between the snap assembly and the valve seat.

[0008] Furthermore, the connecting plate has an aperture, and the free end of the restricting member is offset from the position where the aperture is located. This design reduces the volume of the snap and prevents interference between the snap assembly and other elements.

[0009] Furthermore, the free end of the restricting member is located between the connecting portion and the hook. With this design, when installing the snap, the restricting member can be aligned first, and then the hook can be fixed to the valve seat. The fixing portion can not only limit the axial movement of the coil portion, but also the circumferential movement of the coil portion, and the integration of the fixing portion can be improved, making operation easier.

[0010] The fixed part further includes an operating piece, which is provided on the connecting plate and located on one side of the connecting plate facing away from the connecting part. With this design, when connecting the fixed part to the valve seat, the operating piece is operated to change the angle between the fixed part and the connecting part, and after alignment, the operating piece is released, which makes operation easy and the structure simple.

[0011] The snap further includes a support portion, the support portion and the fixing portion are spaced apart along the circumferential direction of the connecting portion, and the support portion includes a support plate, which is inclined relative to the connecting portion. With this design, an included angle is formed between the support plate and the connecting portion, which allows the support plate to better elastically deform, and the support portion can perform a better restricting function.

[0012] In addition, the support part further includes an arc-shaped plate, the arc-shaped plate is connected to the connecting part, and the support plate is connected to the arc-shaped plate. With this design, the arc-shaped plate can provide a buffering effect when the support plate and the limiting surface abut against each other, thereby preventing damage to the coil part due to excessive impact force when the support part and the limiting surface abut against each other.

[0013] According to another aspect of the present application, there is provided a valve device including a valve body, a coil portion, and the snap provided above, wherein the valve body includes a valve sleeve, the coil portion is fitted to the outside of the valve sleeve, and a connection portion of the snap is connected to the coil portion. With this design, the snap can be connected to the coil portion, making subsequent assembly easier.

[0014] The valve device further includes a valve seat, the outer surface of which is provided with a protrusion and a recess, the snap assembly is engaged with the protrusion, and the free end of the restricting member is inserted into the recess. This design simplifies the structure and ensures stability when the restricting member and the snap assembly are connected to the restricting groove and the slot, respectively.

[0015] Furthermore, the snap assembly includes a hook, a slot and a limiting groove are provided on the outer surface of the valve seat, the valve seat portion between the slot and one end face of the valve seat forms a protrusion, the hook of the snap is engaged with the protrusion, the limiting groove is provided on the protrusion, the recess is the limiting groove, one end of the limiting groove adjacent to the slot penetrates one end face of the valve seat, the portion between the one end of the limiting groove adjacent to the slot and the slot forms part of the protrusion, and the free end of the limiting member is located in the limiting groove. With this design, when connecting the fixing part and the valve seat, assembly only needs to be performed once, and further, the fixing step of the coil part is simplified and fixing the coil part is made easier.

[0016] The restricting member further includes a first restricting surface and a second restricting surface facing each other and a third restricting surface located between the first and second restricting surfaces, and the restricting groove includes a first side surface and a second side surface facing each other and a bottom surface located between the first and second side surfaces, the first restricting surface and the first side surface being closely spaced, the second restricting surface and the second side surface being closely spaced, and there is a gap between the third restricting surface and the bottom surface. This design simplifies the structure, facilitates processing of the valve seat, and ensures stability when the restricting member and the snap assembly are connected to the restricting groove and the slot, respectively.

[0017] The snap further includes a support plate connected to the connecting portion and inclined relative to the connecting portion, the valve body further includes a valve cover connected to the valve sleeve, an opening is provided on one end face of the valve seat, the valve cover is connected to the valve seat with at least a portion located within the opening, the valve cover has a limiting surface, and the support plate of the snap is inclined relative to the limiting surface and abuts against the limiting surface. With this design, when the support portion and the valve cover abut against each other, it is easy to design the dimensions of the support portion and the supporting effect of the support portion and the coil portion can be ensured. [Brief explanation of the drawings]

[0018] The drawings in the specification that form a part of this application are intended to provide a further understanding of the application, and the schematic examples and their descriptions in the application are intended to help interpret the application and are not intended to unduly limit the application.

[0019] [Figure 1] 1 shows a structural schematic diagram of a snap provided in accordance with an embodiment of the present application. [Figure 2] 1 shows a structural schematic diagram of a valve seat provided according to an embodiment of the present application; [Figure 3] 1 shows a structural schematic diagram of a valve device provided according to an embodiment of the present application. [Figure 4] 1 illustrates an exploded view of a valve device provided in accordance with an embodiment of the present application.

[0020] Here, the above drawings include the following reference numerals: 10 connection part, 20 Support part, 21 Arc plate, 22 Support plate, 30 fixing portion, 31 snap assembly, 311 connecting plate, 3111 opening, 312 hook, 32 limiting member, 321 first limiting surface, 322 second limiting surface, 323 third limiting surface, 33 Operation piece, 100 valve seat, 101 limiting groove, 1011 first side surface, 1012 second side surface, 1013 bottom surface, 102 slots, 200 valve body, 201 valve sleeve, 202 valve cover, 2021 limiting surface, 300 coil section. DETAILED DESCRIPTION OF THE INVENTION

[0021] The technical aspects of the embodiments of the present application are described below clearly and completely with reference to the drawings in the embodiments of the present application, but it is clear that the described embodiments are only some of the embodiments of the present application, and are not all of the embodiments. Based on the embodiments of the present application, all other embodiments that can be obtained by a person skilled in the art without creative efforts shall fall within the scope of protection of the present application.

[0022] 1 , an embodiment of the present application provides a snap including a connecting portion 10 and a fixing portion 30, where the fixing portion 30 is provided on the connecting portion 10. The fixing portion 30 includes a snap assembly 31 and a restricting member 32, where the restricting member 32 has a connecting end and a free end provided opposite to each other, the connecting end of the restricting member 32 is connected to the snap assembly 31, and the free end of the restricting member 32 is located outside the snap assembly 31 and faces the surface of the snap assembly 31 facing the connecting portion 10. In the present application, the connecting portion 10 is connected to a coil portion 300, the snap assembly 31 is used to engage with a valve seat 100 of a valve device, and the restricting member 32 is used to engage with the valve seat 100 of the valve device in a circumferential direction.

[0023] Because the valve device includes a valve seat 100 and a coil portion 300, the coil portion 300 needs to be fixed to the valve seat 100 during operation. The coil portion 300 is fixedly connected to the connecting portion 10, and the snap assembly 31 is locked to the valve seat 100. When attaching the snap, the restricting member 32 is first attached to the corresponding position of the valve seat 100, and then the snap assembly 31 is fixed to the valve seat 100. This reduces the difficulty of attaching the snap and makes it easier to attach the snap. Fixing the snap assembly 31 to the valve seat 100 prevents the coil portion 300 from moving upward along the axial direction of the valve device and falling off. The circumferential restrictive engagement between the restricting member 32 and the valve seat 100 prevents the coil portion 300 from rotating around the axis of the valve seat 100 during operation. The above structure can avoid the need for complicated steps such as aligning screw holes and tightening screws when installing the coil part 300, thereby improving the installation efficiency of the coil part 300 and the valve seat 100 and ensuring the stability of the coil part 300 during use. Furthermore, in the prior art, when screws are used to fasten the coil part 300, the screws are likely to loosen when the valve device operates in a vibrating working environment, affecting the reliability of the valve device. However, in the present application, the snap stably connects the coil part 300 and the valve seat 100, preventing the coil part 300 from loosening and improving the reliability of the valve device.

[0024] Here, an included angle is formed between the restricting member 32 and the snap assembly 31, and the restricting member 32 is provided at an angle in the direction approaching the connecting portion 10. This design makes it easy to process the restricting member 32 and facilitates the restrictive engagement between the restricting member 32 and the valve seat 100 in the circumferential direction.

[0025] Furthermore, the snap assembly 31 includes a connection plate 311 connected to the connection portion 10, and the connection plate 311 is provided with a hook 312, and the bent portion of the hook 312 is located on one side of the connection plate 311 facing the connection portion 10, so that the hook 312 can be locked onto the valve seat 100. This design makes it easy to connect the hook 312 to the valve seat 100, and also ensures the connection and fastening between the snap assembly 31 and the valve seat 100.

[0026] Specifically, the connecting plate 311 has an opening 3111, and the free end of the limiting member 32 is offset from the position where the opening 3111 is located. This design makes it easier to process the limiting member 32 and reduces the weight of the snap.

[0027] Here, the free end of the restricting member 32 is located between the connecting portion 10 and the hook 312. With this design, when installing the snap, the restricting member 32 can be installed at the correct position first, and then the hook 312 can be fixed to the valve seat 100. The fixing portion 30 can not only restrict the coil portion 300 from moving upward along the axial direction of the valve device, but also restrict the coil portion 300 from rotating in the circumferential direction along the axial direction of the valve device. This improves the integration of the fixing portion, making operation easier.

[0028] Furthermore, the restricting member 32 has an elastic sheet-like structure. This design simplifies the structure, facilitates processing and manufacturing of the restricting member 32, and ensures the restricting effect of the restricting member 32 in the circumferential direction. The fixed part 30 and the connecting part 10 are elastically connected. In the present application, the connecting plate 311 itself is elastic. In this way, when connecting the fixed part 30 and the valve seat 100, it is only necessary to operate the fixed part 30, which simplifies the structure and makes it easy to connect the fixed part 30 and the valve seat 100.

[0029] Furthermore, the fixed part 30 further includes an operating piece 33, which is provided on the connecting plate 311 and is located on one side of the connecting plate 311 facing away from the connecting part 10. With this design, when connecting the fixed part 30 and the valve seat 100, the angle between the fixed part 30 and the connecting part 10 can be changed by operating the operating piece 33, and after alignment, the operating piece 33 can be released, which makes operation easy and the structure simple.

[0030] Here, the snap further includes a support portion 20, and the support portion 20 and the fixing portion 30 are spaced apart along the circumferential direction of the connecting portion 10, and the support portion 20 can support the coil portion 300. The support portion 20 includes a support plate 22, which is inclined relative to the connecting portion 10. The valve device is provided with a limiting surface 2021, and when the support portion 20 supports the coil portion 300, the support plate 22 abuts against the limiting surface 2021 to prevent the coil portion 300 from moving downward along the axial direction of the coil portion 300. In addition, the included angle between the support plate 22 and the connecting portion 10 allows the support plate 22 to more easily deform elastically, and the support portion 20 can perform a more effective limiting function.

[0031] Specifically, the support part 20 further includes an arc-shaped plate 21, which is connected to the connection part 10, and the support plate 22 is connected to the arc-shaped plate 21. Specifically, the arc-shaped plate 21 is elastically connected to the connection part 10. With this design, the arc-shaped plate 21 provides a cushioning effect when the support plate 22 and the limiting surface 2021 abut against each other, thereby preventing damage to the coil part 300 due to excessive impact force when the support part 20 and the limiting surface 2021 abut against each other.

[0032] Here, the snap may include one support part 20 or multiple support parts 20. When the snap includes multiple support parts 20, it is possible to better support the coil part 300 and ensure stability during operation of the coil part 300.

[0033] 2 to 4, another embodiment of the present application provides a valve device including a valve body 200, a coil portion 300, and the snap provided above, wherein the valve body 200 includes a valve sleeve 201, the coil portion 300 is fitted onto the outside of the valve sleeve 201, and the connection portion 10 of the snap is connected to the coil portion 300. With this design, the snap can be connected to the coil portion 300, making subsequent assembly easier.

[0034] Specifically, the valve device further includes a valve seat 100, the outer surface of which is provided with a protrusion and a recess, the snap assembly 31 is engaged with the protrusion, and the free end of the restricting member 32 is inserted into the recess. This design simplifies the structure and ensures stability when the restricting member 32 and the snap assembly 31 are connected to the restricting groove 101 and the slot 102, respectively. At the same time, the valve device employing the above-mentioned snap makes it easy to fix the coil part 300 to the valve seat 100.

[0035] Here, the snap assembly 31 includes a hook 312, and the outer surface of the valve seat 100 is provided with a slot 102 and a limiting groove 101. The valve seat portion between the slot 102 and one end face of the valve seat 100 forms a protrusion, and the hook 312 of the snap is engaged with the protrusion. In this application, the one end face of the valve seat 100 refers to the end face of the valve seat facing the connecting portion 10. The limiting groove 101 is provided in the protrusion, and the recess is the limiting groove 101. One end of the limiting groove 101 away from the slot 102 penetrates the one end face of the valve seat 100, and the portion between the one end of the limiting groove 101 close to the slot 102 and the slot 102 forms part of the protrusion. The hook 312 and the limiting member 32 are spaced apart along the axial direction of the valve device. With this design, when connecting the fixing part 30 and the valve seat 100, only one assembly is required. Furthermore, the fixing step of the coil part 300 is simplified, making it easier to fix the coil part 300. At the same time, in this way, the snaps can be provided separately when restricting the axial and circumferential movements of the coil portion 300, so that if the restricting member 32 fails to engage with the restricting groove 101 or the snap assembly 31 fails to engage with the slot 102, the other will not be able to engage, which makes maintenance of the valve device easier.

[0036] The free end of the limiting member 32 is located within the limiting groove 101, and the side wall of the limiting member 32 and the inner wall of the limiting groove 101 are in limiting engagement. In terms of a specific structure, the limiting member 32 includes a first limiting surface 321 and a second limiting surface 322 arranged opposite each other, and a third limiting surface 323 located between the first limiting surface 321 and the second limiting surface 322. The limiting groove 101 includes a first side surface 1011 and a second side surface 1012 arranged opposite each other, and a bottom surface 1013 located between the first side surface 1011 and the second side surface 1012. The first limiting surface 321 and the first side surface 1011 are in close contact with each other, the second limiting surface 322 and the second side surface 1012 are in close contact with each other, and the third limiting surface 323 and the bottom surface 1013 may be in close contact with each other or may have a gap therebetween. It should be noted in this embodiment that when the third limiting surface 323 and the bottom surface 1013 are not in close contact with each other, the support part 20 and the snap assembly 31 cooperate to ensure the axial stability of the valve device of the coil part 300. This design simplifies the structure, simplifies the processing of the valve seat 100, and ensures the stability when the limiting member 32 and the snap assembly 31 are connected to the limiting groove 101 and the slot 102, respectively.

[0037] The snap further includes a support plate 22 connected to the connecting part 10 and inclined relative to the connecting part 10. The valve body 200 further includes a valve cover 202 connected to the valve sleeve 201. An opening is provided on one end face of the valve seat 100, and the valve cover 202 is connected to the valve seat 100 with at least a portion of the valve cover 202 located within the opening. The valve cover 202 is provided with a limiting surface 2021, and the support plate 22 of the snap is inclined relative to the limiting surface 2021 and abuts against the limiting surface 2021. In the prior art, the valve seat 100 usually has relatively large machining and installation errors, and the machining accuracy of the valve cover 202 is higher than that of the valve seat 100. With this design, when the support part 20 and the valve cover 202 abut, it is easy to design the dimensions of the support part 20 and ensure the supporting effect of the support part 20 and the coil part 300.

[0038] The principle of use of the snap-equipped valve device of this embodiment is as follows: the snap connection part 10 is fixedly connected to the coil part 300, the hook 312 of the fixing part 30 is engaged with the protrusion of the valve seat 100 to prevent the coil part 300 from moving upward along the axis during operation, one end of the restricting member 32 is inserted into the recess of the valve seat 100 to prevent the coil part 300 from rotating in the circumferential direction during operation, and the snap support part 20 is abutted against the restricting surface 2021 of the valve cover 202 to prevent the coil part 300 from moving downward along the axis during operation.

[0039] It should be noted that the terminology used herein is merely for the purpose of describing specific embodiments and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and further, when the terms "comprise" and / or "comprises" are used herein, they should also be understood to indicate the presence of features, steps, operations, devices, assemblies, and / or combinations thereof.

[0040] Unless otherwise specifically stated, the relative arrangements, formulas, and numerical values ​​of components and steps described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for convenience of description, the dimensions of each part shown in the drawings are not drawn according to actual proportional relationships. Although techniques, methods, and equipment already known to those skilled in the art will not be discussed in detail, such techniques, methods, and equipment should be considered part of the permitted specification, if necessary. In all examples shown and discussed herein, any specific values ​​are merely illustrative and should not be construed as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar symbols and letters indicate similar elements in the following drawings; therefore, once any element is defined in one drawing, it does not require further description in subsequent drawings.

[0041] In the description of this application, orientations or positional relationships indicated by directional terms such as "front," "rear," "up," "down," "left," "right," "lateral," "longitudinal," "vertical," "horizontal," "top," and "bottom" are generally orientations or positional relationships based on illustrations, and are provided merely for the convenience and simplification of the description of this application. Unless otherwise stated, these directional terms do not indicate or imply that a specified device or element has a particular orientation or must be configured and operated in a particular orientation, and therefore should not be understood as limiting the scope of protection of this application. The directional terms "inside" and "outside" should be understood to mean the inside and outside of the outline of each member itself.

[0042] For convenience of description, spatially relative terms such as "on," "above," "on top of," "on top of," etc. may be used herein to describe the spatial relationship of one illustrated device or feature to another. Spatially relative terms should be understood to encompass different orientations of the device during use or operation in addition to the orientation depicted in the drawings. For example, if a device in the drawings is inverted, a device described as "above other devices or structures" or "on other devices or structures" would thereafter be positioned as "below other devices or structures" or "under other devices or structures." Thus, the exemplary term "above" may encompass both an orientation of "above" and "below." The device may be positioned in other different ways (rotated 90 degrees or at other orientations), and the spatially relative descriptions used herein may be interpreted accordingly.

[0043] Furthermore, it should be explained that the use of words such as "first" and "second" to define components is merely to easily distinguish corresponding components, and unless otherwise specified, the above words do not have any special meaning, and therefore should not be understood as limiting the scope of protection of the present application.

[0044] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Those skilled in the art can make various modifications and variations to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application should be included within the protection scope of the present application.

Claims

1. A connection part (10), a fixing portion (30) provided on the connection portion (10), The fixing portion (30) includes a snap assembly (31) and a restricting member (32); The restricting member (32) has a connecting end and a free end provided opposite to each other, The connecting end of the restricting member (32) is connected to the snap assembly (31); The free end of the restricting member (32) is located outside the snap assembly (31) and faces the surface of the snap assembly (31) facing the connecting portion (10). snap.

2. The snap assembly (31) includes a connecting plate (311) connected to the connecting portion (10); The connecting plate (311) is provided with a hook (312), 2. The snap according to claim 1, wherein the bent portion of the hook (312) is located on one side of the connecting plate (311) facing the connecting portion (10).

3. The connecting plate (311) has an opening (3111), 3. The snap according to claim 2, wherein the free end of the restricting member (32) is offset from the position where the aperture (3111) is located.

4. 3. The snap according to claim 2, wherein the free end of the restricting member (32) is located between the connecting portion (10) and the hook (312).

5. The fixing portion (30) further includes an operating piece (33), The snap according to claim 2, wherein the operating piece (33) is provided on the connecting plate (311), and the operating piece (33) is located on one side of the connecting plate (311) facing away from the connecting portion (10).

6. Further comprising a support portion (20), The support portion (20) and the fixing portion (30) are provided at intervals along the circumferential direction of the connection portion (10), The support portion (20) includes a support plate (22), 2. The snap according to claim 1, wherein the support plate (22) is provided at an angle to the connecting portion (10).

7. The support portion (20) further includes an arc-shaped plate (21), The arc-shaped plate (21) is connected to the connection part (10), 7. The snap according to claim 6, wherein the support plate (22) is connected to the arc-shaped plate (21).

8. A valve body (200), a coil portion (300), and a snap according to any one of claims 1 to 7, The valve body (200) includes a valve sleeve (201), The coil portion (300) is fitted to the outside of the valve sleeve (201), The snap connection (10) is connected to the coil portion (300).

9. Further comprising a valve seat (100); The outer surface of the valve seat is provided with a protrusion and a recess, The snap assembly (31) is engaged with the protrusion, 9. The valve arrangement of claim 8, wherein the free end of the restrictor member (32) is inserted into the recess.

10. The snap assembly (31) includes a hook (312); The outer surface of the valve seat (100) is provided with a slot (102) and a limiting groove (101); a valve seat portion between the slot (102) and one end surface of the valve seat (100) constitutes the protrusion; The hook (312) is engaged with the protrusion, The limiting groove (101) is provided in the protrusion, The recess is the limiting groove (101), One end of the limiting groove (101) remote from the slot (102) penetrates one end face of the valve seat (100); The portion between the end of the limiting groove (101) adjacent to the slot (102) and the slot (102) is a part of the protrusion, 10. The valve device according to claim 9, wherein the free end of the restricting member (32) is located in the restricting groove (101).

11. The restricting member (32) includes a first restricting surface (321) and a second restricting surface (322) that are provided opposite to each other, and a third restricting surface (323) that is located between the first restricting surface (321) and the second restricting surface (322), The limiting groove (101) includes a first side surface (1011) and a second side surface (1012) that are provided opposite to each other, and a bottom surface (1013) that is located between the first side surface (1011) and the second side surface (1012), The first limiting surface (321) and the first side surface (1011) are in close contact with each other, The second limiting surface (322) and the second side surface (1012) are in close contact with each other, The valve device according to claim 10, wherein there is a gap between the third limiting surface (323) and the bottom surface (1013).

12. The snap further includes a support plate (22) connected to the connecting portion (10) and inclined relative to the connecting portion (10), The valve body (200) further includes a valve cover (202) connected to the valve sleeve (201); An opening is provided on one end surface of the valve seat (100), the valve cover (202) is at least partially located within the opening and connected to the valve seat (100); The valve cover (202) has a limiting surface (2021), 10. The valve device according to claim 9, wherein the support plate (22) of the snap is inclined relative to the limiting surface (2021) and abuts against the limiting surface (2021).

Images