CN221198509U - Arrangement for an environmental monitoring device - Google Patents

Abstract

The present disclosure relates to an arrangement structure for an environmental monitoring device, the arrangement structure comprising: a waterproof housing; a circuit board arranged inside the housing; and at least two penetration components; wherein the through hole of the housing has a corresponding step portion, the penetration component has a corresponding flange on the circumferential surface, and the corresponding flange of each penetration component can be arranged at the corresponding step portion, wherein a sealing structure can be constructed between the first surface of the corresponding step portion facing the inside of the housing and the second surface of the corresponding flange facing the outside of the housing, wherein the depth spacing between each first surface and the inner side surface of the housing is respectively designed so that in the assembled state, the protrusion amount of each penetration component protruding from the inner side surface of the housing is the same, so that the parts of each penetration component coupled to the circuit board are flush with each other. Thereby, good waterproof protection can be achieved for the electronic components arranged inside the environmental monitoring device. In addition, the size of the penetration component can be adapted.

Description

Arrangement structure for environmental monitoring equipment

Technical Field

The present disclosure relates to arrangements for environmental monitoring devices.

Background technique

In many application scenarios, it is necessary to monitor the environment and collect data from the environment to help users analyze and make decisions. Environmental monitoring equipment that completes such tasks is usually placed outdoors for a long time, so there is a waterproof requirement for the environmental monitoring equipment to avoid being affected by weather such as rain and snow. The waterproof requirement usually exists in the matching structure of components passing through the through holes of the shell, such as connectors or buttons and the through holes, so as to protect the electronic devices arranged inside the environmental monitoring equipment from being affected by external weather. In addition, since connectors or buttons usually have different sizes, adaptation is also required for these different sizes.

Utility Model Content

Therefore, the object of the present disclosure is to provide an arrangement structure for an environmental monitoring device, by means of which good waterproof protection can be achieved for electronic components arranged inside the environmental monitoring device. In addition, by means of the arrangement structure, the size of the through-hole component passing through the housing can be adapted.

According to the present disclosure, there is provided an arrangement structure for an environmental monitoring device, the arrangement structure comprising: a waterproof shell; a circuit board arranged inside the shell; and at least two through-parts, the at least two through-parts being configured to connect the internal components of the environmental monitoring device with external components and/or configured to manipulate the internal components of the environmental monitoring device from the outside, the at least two through-parts passing through corresponding through-holes of the shell corresponding to each through-part, and corresponding one end of the at least two through-parts being coupled to the circuit board; characterized in that each of the through-holes has a corresponding stepped portion, and each of the through-holes has a stepped portion. The component has a corresponding flange on the circumferential surface, and the corresponding flange of each of the through-components can be arranged at the corresponding stepped portion of the corresponding through-hole, wherein a sealing structure can be constructed between the first surface of the corresponding stepped portion facing the interior of the shell and the second surface of the corresponding flange facing the exterior of the shell, wherein the depth spacing between each of the first surfaces and the inner side surface of the shell is respectively designed so that in the assembled state, the protrusion amount of each of the through-components extending out of the inner side surface of the shell is the same, so that the parts of each of the through-components coupled to the circuit board are flush with each other, so that the circuit board can be placed flat on each of the through-components.

Through the arrangement structure for environmental monitoring equipment according to the present disclosure, especially through the step portion according to the present disclosure, on the one hand, a sealing structure can be achieved between the shell and the through-hole component, and on the other hand, the circuit board mounted on each through-hole component can be arranged flatly, especially parallel to the inner side of the shell.

In some embodiments, one of the at least two through-parts may be constructed as a connector for connecting an internal component of an environmental monitoring device with an external component, and a self-continuously closed elastic sealing element may be arranged between a first surface of a corresponding step portion and a second surface of a corresponding flange, and the elastic sealing element may be elastically compressed.

In some embodiments, at least two elastic sealing elements may be arranged between the first surface of the corresponding step portion and the second surface of the corresponding flange, and the at least two elastic sealing elements are arranged concentrically with each other, and the elastic sealing element at the outside correspondingly surrounds the elastic sealing element at the inside. By providing at least two elastic sealing elements, a multiple sealing structure may be formed between the first surface of the corresponding step portion and the second surface of the corresponding flange, thereby increasing the redundancy of the sealing structure and ensuring the reliability of the seal.

In some embodiments, at least one recessed portion for accommodating the elastic sealing element may be configured in the first surface of the corresponding step portion. When the recessed portion is provided, accurate positioning of the elastic sealing element may be achieved.

In some embodiments, the resilient sealing element may be received in the recess and in an undeformed state the resilient sealing element may protrude beyond the recess.

In some embodiments, the volume of the elastic sealing element in the extrusion deformation state may be smaller than the volume of the recessed portion. When the height of the corresponding elastic sealing element in the undeformed state is greater than the depth of the corresponding recessed portion and the volume of the corresponding elastic sealing element in the extrusion deformation state is smaller than the volume of the corresponding recessed portion, a tight fit can be generated between the first surface of the corresponding step portion and the second surface of the corresponding flange in the area outside the recessed portion, thereby further improving the sealing performance. In addition, at this time, when designing the depth spacing between the first surface and the inner side surface of the shell, the compression amount of the elastic sealing element does not need to be considered, thereby simplifying the difficulty of depth spacing design.

In some embodiments, a first raised sealing portion may be configured between the first surface of the corresponding step portion and the elastic sealing element, and the first raised sealing portion may be formed by a rigid step portion raised rib raised on the first surface of the corresponding step portion or by a first elastic sealing element raised rib on the elastic sealing element that contacts the first surface of the corresponding step portion. Thus, an interference fit may be achieved between the first surface of the corresponding step portion and the elastic sealing element, thereby achieving a stable and good sealing effect.

In some embodiments, a second raised sealing portion may be configured between the second surface of the corresponding flange and the elastic sealing element, and the second raised sealing portion is formed by a second elastic sealing element raised rib on the elastic sealing element that contacts the second surface of the corresponding flange. Thus, an interference fit may be achieved between the second surface of the corresponding flange and the elastic sealing element, thereby achieving a stable and good sealing effect.

In some embodiments, a fastening member may be provided, through which the connector and the housing can be fixedly connected, so as to generate a pressing force that causes the elastic sealing element to perform sealing cooperation with the step portion and the flange.

In some embodiments, the depth spacing between the first surface of the corresponding step portion of the connector and the inner side surface of the housing may be determined according to the thickness of the elastic sealing element after being compressed under the action of the pressing force.

In some embodiments, the connector may be configured as a GPIO connector or a USB connector.

In some embodiments, the connector may have a screw cap matched with the end portion disposed outside, and the screw cap can be used to seal the end portion of the connector disposed outside when not in use. Thus, when not in use, the end portion of the connector exposed outside can be sealed by the screw cap to prevent it from being affected by adverse weather.

In some embodiments, the cross section of the section with a smaller diameter of the stepped portion of the through hole of the connector is configured as a truncated circular shape to cooperate with the corresponding mating structure of the connector. Thus, a so-called "foolproof" design can be achieved, thereby simplifying the installation difficulty when the connector is installed in the housing through hole.

In some embodiments, one of the at least two through-parts is configured as a button for operating an internal component of the environment monitoring device from the outside, the button having an elastically deformable waterproof cap, the flange of the button being integrally formed on the waterproof cap. The waterproof cap may be made of an elastomer, such as rubber.

In some embodiments, the flange of the waterproof cap of the key is bonded to the first surface of the corresponding step portion through a sealant via the second surface of the flange.

In some embodiments, the fastening member comprises a threaded connection structure.

In some embodiments, the elastic sealing element is made of silicone or EPDM.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure is further explained below by means of exemplary embodiments with reference to the schematic drawings.

in:

FIG. 1 is a schematic perspective view of an arrangement structure for an environment monitoring device without a housing according to one embodiment of the present disclosure.

FIG. 2 is a schematic cross-sectional view of an arrangement structure with a housing for an environment monitoring device according to an embodiment of the present disclosure.

FIG. 3 is a schematic cross-sectional view of a sealing structure with a recessed portion for an arrangement structure of an environment monitoring device according to an embodiment of the present disclosure.

FIG. 4 a is a schematic cross-sectional view of a sealing structure with a raised sealing portion for an arrangement structure of an environment monitoring device according to an embodiment of the present disclosure.

FIG. 4 b is a schematic cross-sectional view of an elastic sealing element with raised ribs of the elastic sealing element according to an embodiment of the present disclosure.

FIG. 5 a is a schematic cross-sectional view of a portion of a housing of the arrangement in FIG. 2 .

FIG. 5 b is a schematic top view of a portion of the housing of the arrangement in FIG. 2 .

Detailed ways

Various exemplary embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of an arrangement structure for an environmental monitoring device without a shell according to an embodiment of the present disclosure. Fig. 2 is a schematic cross-sectional view of an arrangement structure for an environmental monitoring device with a shell according to an embodiment of the present disclosure. Fig. 3 is a schematic cross-sectional view of a sealing structure with a recessed portion of an arrangement structure for an environmental monitoring device according to an embodiment of the present disclosure. Fig. 4a is a schematic cross-sectional view of a sealing structure with a raised sealing portion of an arrangement structure for an environmental monitoring device according to an embodiment of the present disclosure. Fig. 4b is a schematic cross-sectional view of an elastic sealing element with raised ribs of the elastic sealing element according to an embodiment of the present disclosure. Fig. 5a is a schematic cross-sectional view of a portion of the shell of the arrangement structure in Fig. 2. Fig. 5b is a schematic top view of a portion of the shell of the arrangement structure in Fig. 2.

As shown in Figures 1 and 2, in this embodiment, the arrangement structure for the environmental monitoring device according to the present disclosure includes: a waterproof housing 1, a circuit board 2 arranged inside the housing 1, two connectors 31 for connecting the internal components of the environmental monitoring device with external components, and a button 32 for operating the internal components of the environmental monitoring device from the outside. The two connectors 31 can be a GPIO connector 311 and a USB connector 312, wherein the circuit board 2 can be coupled to the solar panel 5 (see Figure 5) arranged outside via the GPIO connector 311, and the USB connector 312 can be used for coupling with other external components. The above connectors 31 and the button 32 are constructed as through-components 3 in this article. Through holes 11 for corresponding through-components 3 are respectively provided in the housing 1. As clearly seen in Figure 2, these through-components 3 pass through the corresponding through holes 11 of the housing 1 that are equipped with each through-component 3. The corresponding one end of these through-components 3 is coupled to the circuit board 2. The corresponding other end of these through-components 3 extends out of the housing 1. In the implementations shown in FIG. 1 and FIG. 2 , two connectors 31 and one button 32 are provided as the through-components 3. In some other embodiments, other numbers or types of through-components 3 may also be provided. For example, two connectors 31, or one connector 31 and one button 32, or more than three through-components 3 may be provided.

As shown in FIG. 2 and FIG. 5a and FIG. 5b, each through hole 11 has a corresponding step portion 12. Each through component 3, that is, each connector 31 and button 32 has a corresponding flange 33 on the circumference. The flange of the GPIO connector 311 and the flange of the USB connector 312 can be arranged at the middle section of the circumference like the usual connector 31. The flange of the button 32 can be arranged at the end section of the circumference. The button 32 can have an elastically deformable waterproof cap 321 composed of an elastomer, and the flange of the button 32 is integrally formed on the waterproof cap 321, for example, as shown in FIG. 2, it is integrally formed at the end section of the circumference of the waterproof cap 321. The lateral dimensions of each through hole 11 match the lateral dimensions of each through component 3. In particular, the lateral dimensions of the step portion 12 of each through hole 11 match the lateral dimensions of the flange 33 of each through component 3.

The flange 33 of the through-hole 3 can be arranged, for example, against the corresponding step 12 of the corresponding through hole 11. A sealing structure can be constructed between the first surface 121 of the corresponding step 12 facing the inside of the housing 1 and the second surface 331 of the corresponding flange 33 facing the outside of the housing 1. For the connector 31, the sealing structure can be realized by an elastic sealing element 4 arranged between the first surface 121 of the corresponding step 12 and the second surface 331 of the corresponding flange 33. The elastic sealing element 4 can be closed continuously by itself, that is, it can be constructed as a sealing ring or a sealing ring. In order to fix the connector 31 with the housing 1, a fastening member 313, such as a bolt-nut threaded connection member, can be provided. The fastening member 313 can generate a pressing force that makes the elastic sealing element 4 seal with the step 12 and the flange 33. For the button 32, the flange 33 of the waterproof cap 321 of the button 32 can be bonded to the first surface 121 of the corresponding step 12 with its second surface 331 by a sealant.

As shown in FIG. 2 , in this embodiment, the depth spacing between each first surface 121, especially the area of the first surface 121 for setting the corresponding flange 33, and the inner side surface 13 of the housing 1 is respectively designed so that in the assembled state, the GPIO connector 311, the USB connector 312, and the button 32 extend out of the inner side surface 13 of the housing 1 by the same amount, so that the parts of the GPIO connector 311, the USB connector 312, and the button 32 coupled to the circuit board 2 are flush with each other. As a result, the circuit board 2 can be placed flat on the GPIO connector 311, the USB connector 312, and the button 32. In some embodiments, for different types of connectors 31 and buttons 32, the depth spacing between each first surface 121 and the inner side surface 13 of the housing 1 can be designed according to the different structures of the connector 31 and the button 32 and, if necessary, according to the thickness of the sealing structure, especially the thickness after compression. The depth spacing between each first surface 121 and the inner side surface 13 of the housing 1 can also be well seen in FIG. 5a.

In addition, as clearly shown in FIG. 2 , as described above, in the case where the flange 33 of the connector 31 is arranged at the corresponding step 12 of the corresponding through hole 11, the sealing structure can be realized by a self-continuously closed elastic sealing element 4 arranged between the first surface 121 of the corresponding step 12 and the second surface 331 of the corresponding flange 33, and the elastic sealing element 4 can be elastically compressed. In the embodiment shown in FIG. 2 , one elastic sealing element 4 is arranged between the first surface 121 of the corresponding step 12 and the second surface 331 of the corresponding flange 33. In other embodiments, at least two elastic sealing elements 4 can also be arranged between the first surface 121 of the corresponding step 12 and the second surface 331 of the corresponding flange 33, and the at least two elastic sealing elements 4 are arranged concentrically with each other, and the elastic sealing element 4 on the outside surrounds the elastic sealing element 4 on the inside. In this way, multiple seals can be provided between the first surface 121 of the corresponding step 12 and the second surface 331 of the corresponding flange 33.

In the embodiment shown in FIG. 2 , the first surface 121 of the step portion 12, the second surface 331 of the flange 33 of the connector 31, and the surfaces of the elastic sealing element 4 and the first surface 121 and the second surface 331 are respectively constructed flat. In other embodiments, as shown in FIG. 3 , a recessed portion 122 for accommodating the elastic sealing element 4 may be constructed in the first surface 121 of the corresponding step portion 12. In this embodiment, one recessed portion 122 is provided. In other embodiments, a plurality of recessed portions 122 may also be provided according to the number of the elastic sealing elements 4. The elastic sealing element 4 is accommodated in the recessed portion 122 and in the undeformed state, the elastic sealing element 4 extends beyond the recessed portion 122. Thus, when squeezed, the elastic sealing element 4 can contact the second surface 331 of the flange 33 of the connector 31 and the surface of the recessed portion 122, thereby achieving a sealing effect. The volume of the elastic sealing element 4 in the squeezed deformation state is smaller than the volume of the recessed portion 122. At this time, a tight fit can be generated between the first surface 121 of the corresponding step portion 12 and the second surface 331 of the corresponding flange 33 in the area outside the recessed portion 122, thereby further improving the sealing performance. In addition, when designing the depth spacing between the first surface 121 and the inner side surface 13 of the housing 1, the compression amount of the elastic sealing element 4 does not need to be considered, thereby simplifying the difficulty of designing the depth spacing.

In addition to or as an alternative to the embodiment of FIG. 3 , in the embodiments shown in FIGS. 4a and 4b , a first raised sealing portion may be configured between the first surface 121 of the corresponding step portion 12 and the elastic sealing element 4, wherein, as shown in FIG. 4a , the first raised sealing portion may be formed by a rigid step portion raised rib 41 raised on the first surface 121 of the corresponding step portion 12, or, as shown in FIG. 4b , the first raised sealing portion may be formed by a first elastic sealing element raised rib 42 on the elastic sealing element 4 that contacts the first surface 121 of the corresponding step portion 12. In addition, a second raised sealing portion may be configured between the second surface 331 of the corresponding flange 33 and the elastic sealing element 4. As shown in FIG. 4b , the second raised sealing portion is formed by a second elastic sealing element raised rib 43 on the elastic sealing element 4 that contacts the second surface 331 of the corresponding flange 33. Since the second raised seal is formed by the second elastic sealing element raised rib 43, the second elastic sealing element raised rib is flattened under pressure, so the second raised seal cannot be clearly seen under pressure as shown in FIG. 4a. In the embodiments shown in FIG. 4a and FIG. 4b, a first raised seal and a second raised seal are provided. In other embodiments, a plurality of first raised seals and/or second raised seals may also be provided. When the connector 31 and the housing 1 are fixedly connected by the fastening member 313, the first raised seal and the second raised seal are subjected to the pressing force generated by the fastening member 313, and thus an interference fit occurs between the elastic sealing element 4 and the flange 33 and the stepped portion 12 of the connector 31. The interference fit may be an interference caused by the elastic sealing element 4 being pressed into the rigid stepped portion raised rib 41 of the stepped portion 12, or an interference caused by the corresponding elastic sealing element raised rib on the elastic sealing element 4 being flattened by the flange 33 and the stepped portion 12 of the connector 31.

The structures of the through holes 11 and the stepped portions 12 of the housing 1 can be clearly seen in FIG. 5a and FIG. 5b. As shown in FIG. 5a, the depth spacing between the first surface 121 of each stepped portion 12 and the inner side surface 13 of the housing 1 is designed differently according to the structure of the matching connector 31 or button 32 and the size of the corresponding sealing structure. As shown in FIG. 5b, the cross section of the section with a smaller diameter of the stepped portion 12 of the through hole 11 for the connector 31 can be constructed as a truncated circular shape to match the corresponding matching structure of the connector 31. The truncated circular portion has a protrusion 14 protruding from the cylindrical inner wall. The shape of the truncated circular portion matches the truncated circular profile at the connector 31. Thus, a "foolproof" design for the installation of the connector 31 in the through hole 11 can be achieved.

In addition to the above-mentioned sealing structure, in order to achieve waterproofing, the connector 31 may have a screw cap 314 matched with the end portion disposed outside, and the end portion disposed outside of the connector 31 can be sealed and closed when not in use by the screw cap 314. The screw cap 314 can be disposed on the connector 31 to prevent loss. The screw cap 314 can be connected to the outer end portion of the connector 31 through a threaded structure. The screw cap 314 can be made of plastic or rubber.

It should be noted that the terms used herein are for the purpose of illustrating specific aspects only and are not intended to limit the disclosure. As used herein, the singular forms "a" and "the one" shall include the plural forms unless the context clearly indicates otherwise. It is understood that the terms "include" and "comprises" and other similar terms, when used in the application documents, specify the existence of the stated operations, elements and/or through-parts, without excluding the existence or addition of one or more other operations, elements, through-parts and/or combinations thereof. As used herein, the term "and/or" includes all arbitrary combinations of one or more related enumerated items. In the description of the drawings, similar reference numerals always represent similar elements.

The thickness of the elements in the accompanying drawings can be exaggerated for the sake of clarity. It is also understood that if an element is referred to as being on another element, coupled to another element or connected to another element, then the element can be directly formed on the other element, coupled to it or connected to it, or one or more intervening elements can be arranged between them. On the contrary, if the expressions "directly on...", "directly coupled to..." and "directly connected to..." are used herein, then there is no intervening element. Other words used to illustrate the relationship between elements should be similarly interpreted, such as "between..." and "directly between...", "attachment" and "direct attachment", "adjacent" and "directly adjacent", etc.

Terms such as "top," "bottom," "above," "below," "above," "below," etc. are used herein to describe the relationship of one element, layer or region to another element, layer or region as illustrated in the drawings. It will be understood that these terms are intended to encompass other orientations of the device in addition to the orientation depicted in the drawings.

It is to be understood that although the terms "first", "second", etc. may be used herein to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Therefore, a first element may be referred to as a second element without departing from the teachings of the present disclosure.

It is also conceivable that all exemplary embodiments disclosed herein can be combined with one another in any desired manner.

Finally, it should be pointed out that the above embodiments are only used to understand the present disclosure, and do not limit the protection scope of the present disclosure. For those skilled in the art, modifications can be made based on the above embodiments, and these modifications do not depart from the protection scope of the present disclosure.

Claims (15)

1. An arrangement for an environmental monitoring device, the arrangement comprising:

A waterproof housing;

a circuit board disposed inside the housing; and

At least two through-parts configured for connecting an inner component of the environmental monitoring device with an outer component and/or for externally handling the inner component of the environmental monitoring device, the at least two through-parts passing through respective through-holes of the housing, which are associated with the respective through-parts, the respective ends of the at least two through-parts being coupled to the circuit board;

Wherein each through-hole has a corresponding step, each through-hole part has a corresponding flange on the peripheral surface, the corresponding flange of each through-hole part can be arranged at the corresponding step of the corresponding through-hole, wherein a sealing structure can be constructed between a first face of the corresponding step facing the inside of the housing and a second face of the corresponding flange facing the outside of the housing,

The depth distance between the first face and the inner side face of the housing is designed such that, in the assembled state, the protruding amount of the through-hole parts protruding from the inner side face of the housing is identical, so that the parts of the through-hole parts coupled to the circuit board are flush with each other, so that the circuit board can be placed flat on the through-hole parts.

2. An arrangement for an environmental monitoring device according to claim 1, characterized in that one of the at least two through parts is configured as a connector for connecting an inner member with an outer member of the environmental monitoring device, and that between a first face of the respective step and a second face of the respective flange a resilient sealing element is arranged which is continuously closed on itself, which resilient sealing element is resiliently compressible.

3. Arrangement for an environmental monitoring device according to claim 2, characterized in that between the first face of the respective step and the second face of the respective flange at least two elastic sealing elements are arranged, which are arranged concentrically to each other, the elastic sealing element lying on the outside respectively surrounding the elastic sealing element lying on the inside.

4. An arrangement for an environmental monitoring device according to claim 2, characterized in that at least one recess for accommodating the resilient sealing element is configured in the first face of the respective step.

5. An arrangement for an environmental monitoring device according to claim 4, characterized in that a resilient sealing element is receivable in the recess and protrudes beyond the recess in an undeformed state.

6. The arrangement for an environmental monitoring device of claim 5, wherein the volume of the resilient sealing element in the crush-deformed state is less than the volume of the recess.

7. An arrangement for an environmental monitoring device according to any one of claims 2 to 6, characterized in that a first raised seal is configured between the first face of the respective step and the resilient sealing element, the first raised seal being formed by a rigid step raised bead raised on the first face of the respective step or by a first resilient sealing element raised bead on the resilient sealing element in contact with the first face of the respective step.

8. An arrangement for an environmental monitoring device according to any one of claims 2 to 6, characterized in that a second raised seal is configured between the second face of the respective flange and the resilient sealing element, the second raised seal being formed by a second resilient sealing element raised bead on the resilient sealing element in contact with the second face of the respective flange.

9. Arrangement for an environmental monitoring device according to any of the claims 2-6, characterized in that fastening means are provided by which the connector can be fixedly connected with the housing in order to generate a pressing force for sealing engagement of the resilient sealing element with the step and the flange.

10. The arrangement for an environmental monitoring device of claim 9, wherein the depth spacing of the first face of the corresponding step for the connector from the inner face of the housing is determined by the thickness of the resilient sealing element after compression under compression.

11. An arrangement for an environmental monitoring device according to any of claims 2 to 6, characterized in that the connector is configured as a GPIO connector or a USB connector.

12. Arrangement for an environmental monitoring device according to any of claims 2 to 6, characterized in that the connector has a screw cap which cooperates with an externally arranged end, by means of which the externally arranged end of the connector can be sealed off in a sealing manner when not in use.

13. An arrangement for an environmental monitoring device according to claim 2, characterized in that the cross-section of the section with smaller diameter of the step for the through hole of the connector is configured as a truncated circle for mating with a corresponding counterpart of the connector.

14. An arrangement for an environmental monitoring device according to claim 1, characterized in that one of the at least two through parts is configured as a key for externally manipulating an internal component of the environmental monitoring device, the key having an elastically deformable waterproof cap on which a flange of the key is integrally formed.

15. The arrangement for an environmental monitoring device of claim 14, wherein the flange of the waterproof cap of the key is adhered to the first face of the corresponding step with the second face of the flange by a sealant.