Interface structure and reference station

Abstract

The utility model specifically relates to an interface structure and a base station. The interface structure comprises a housing, a network cable interface and a waterproof joint assembly. The shell is provided with a mounting end face, a first through hole is formed in the mounting end face, and the hole edge of the first through hole extends towards the outer portion of the shell to form a connecting ring. And the network cable interface is arranged in the shell and is aligned with the first through hole. The waterproof connector assembly is in sealed connection with the inner wall of the connecting ring. A wire passing channel is reserved in the waterproof connector assembly and used for clamping an external network cable, and the two ends of the wire passing channel are communicated with the outside and the network cable interface respectively. The interface structure is wider in application range, can be suitable for outdoor environments and the like, and can effectively prevent the situation that the base station cannot work normally due to the fact that rainwater, snow water and the like permeate into the base station. The problems that in the prior art, a base station is always arranged outdoors and needs to be used in environments such as rainy days and snowy days, and a common network cable interface does not have a waterproof function and is not suitable for being directly applied to the base station are solved.

Description

Technical Field

[0001] The utility model relates to the field of communication equipment, and particularly to an interface structure and a reference station. Background Art

[0002] GNSS (Global Navigation Satellite System) real-time kinematic (RTK) measurement technology is a real-time kinematic positioning technology based on carrier phase observations. It can provide the three-dimensional positioning results of a measuring station in a specified coordinate system in real time. The RTK system usually consists of a reference station and a rover station. The reference station is used to receive satellite signals and calculate correction data, and the rover station is used to receive satellite signals and correction data from the reference station to achieve high-precision positioning. This technology can be applied to the positioning of courtyard robots.

[0003] In the related art, the reference station adopts the common power supply method of the power grid and is connected with a standard power cord. The applicant proposes a solution for applying a new power supply method, that is, the power supply method of PoE (Power over Ethernet). The PoE power supply uses a network cable for power supply. However, since the reference station is often set outdoors and needs to be used in environments such as rainy days and snowy days, the common network cable interface does not have a waterproof function and is not suitable for direct application on the reference station.

[0004] The above content is only used to assist in understanding the technical solution of the present application, and does not represent an admission that the above content is the prior art. Summary of the Utility Model

[0005] In view of this, the utility model provides an interface structure and a reference station, which are used to solve the problem in the related art that since the reference station is often set outdoors and needs to be used in environments such as rainy days and snowy days, the common network cable interface does not have a waterproof function and is not suitable for direct application on the reference station.

[0006] To achieve one or part or all of the above purposes or other purposes, the utility model provides an interface structure, which includes a housing, a network cable interface and a waterproof joint assembly;

[0007] The housing has an installation end face, and a first through hole is opened on the installation end face. The edge of the first through hole extends towards the outside of the housing to form a connecting ring;

[0008] The network cable interface is arranged inside the housing, and the network cable interface is aligned with the first through hole;

[0009] The waterproof joint assembly is hermetically connected to the inner wall of the connecting ring;

[0010] The waterproof joint assembly is internally provided with a wire passing channel for clamping an external network cable, and both ends of the wire passing channel are respectively communicated with the outside and the network cable interface.

[0011] In some alternative embodiments, the waterproof joint assembly includes a ring base and a joint;

[0012] The outer wall of the ring base is hermetically connected to the inner wall of the connecting ring;

[0013] The ring base and the joint are detachably connected;

[0014] The wire passing channel is reserved inside the joint.

[0015] In some alternative embodiments, the joint includes a clamping jaw member, an elastic member and a cap;

[0016] The inside of the clamping jaw member is hollow, and the clamping jaw member is axially formed with a clamping jaw portion, a first threaded portion and a second threaded portion in sequence;

[0017] The second threaded portion is threadedly connected to the ring base;

[0018] The first threaded portion is threadedly connected to the cap;

[0019] The clamping jaw portion can be deformed under the pressing of the cap;

[0020] The elastic member is placed inside the clamping jaw portion, and a first through groove is formed axially inside the elastic member.

[0021] In some alternative embodiments, the joint further includes a plug, and the plug is detachably inserted into the first through groove.

[0022] In some alternative embodiments, the inner diameter of the ring base is a, and 24 mm ≤ a ≤ 30 mm.

[0023] In some alternative embodiments, the distance from the end face of the connecting ring on the side away from the network cable interface to the network cable interface is b, and 10 mm ≤ b ≤ 20 mm.

[0024] The present utility model also provides a reference station, which includes a machine shell and a circuit board arranged inside the machine shell, and further includes the interface structure described in any one of the above, the housing is a part of the machine shell, and the network cable interface is electrically connected to the circuit board.

[0025] In some alternative embodiments, a switch is electrically connected to the circuit board;

[0026] A button groove is formed on the housing, a second through hole is opened in the button groove, and the switch is aligned with the second through hole;

[0027] An elastic button is arranged in the button slot. The elastic button is disposed within the button slot and has an interference fit with the slot wall of the button slot. The elastic button is deformable for pressing or leaving the switch.

[0028] In some alternative embodiments, a clamping hole is formed in the button slot, and a buckle protrudes from the elastic button and is snapped into the clamping hole.

[0029] In some alternative embodiments, a protruding eaves is formed on the outer circumference of the elastic button, and the eaves has an interference fit with the slot wall of the button slot;

[0030] A water-blocking rib protrudes within the button slot, and the water-blocking rib is located on the outer periphery of the second through hole;

[0031] A reserved slot is recessed in the end face of the elastic button facing the button slot, and the water-blocking rib is located within the reserved slot and is in close contact with the side wall of the reserved slot;

[0032] The slot wall of the reserved slot facing the switch is a deformation part, and the deformation part is deformable under an external force;

[0033] The deformation part extends towards the switch to form an abutting top part, and the abutting top part passes through the second through hole. The abutting top part is used for pressing or leaving the switch.

[0034] Implementing the embodiments of the present utility model will have the following beneficial effects:

[0035] The present utility model adopts a scheme in which a waterproof joint assembly is hermetically connected to a connection ring. The connection ring has a water-blocking function to prevent water from contacting and affecting the network cable interface and internal electrical components in the reference station. The waterproof joint assembly is used to clamp the network cable accessing the network cable interface and has functions of positioning the network cable and waterproofing. The application range of the interface structure of the present utility model is wider and can be applied to outdoor environments, etc., and can effectively prevent the situation that the reference station cannot work properly due to rain, snow, etc. seeping into the reference station.

[0036] It solves the problem in the related art that since the reference station is often set outdoors and needs to be used in rainy days, snowy days and other environments, the common network cable interfaces do not have waterproof functions and are not suitable for direct application on the reference station. Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or in the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Wherein:

[0039] Figure 1 is an exploded view of a reference station according to an alternative embodiment of the present utility model;

[0040] Figure 2 is an exploded view of a joint according to an alternative embodiment of the present utility model;

[0041] Figure 3 is a bottom view of a partial structure of a reference station according to an alternative embodiment of the present utility model;

[0042] Figure 4 is a sectional view of a partial structure of a reference station according to an alternative embodiment of the present utility model;

[0043] Figure 5 is an exploded view of a partial structure of a reference station according to an alternative embodiment of the present utility model;

[0044] Figure 6 is a three-dimensional view of an elastic button according to an alternative embodiment of the present utility model;

[0045] Figure 7 is a sectional view of a partial structure of a reference station according to an alternative embodiment of the present utility model.

[0046] Explanation of reference numerals is as follows: 01, housing; 1, shell; 11, mounting end face; 111, first through hole; 12, button groove; 121, water retaining rib; 122, stroke cavity; 123, clamping hole; 124, second through hole; 2, circuit board; 21, network interface; 22, switch; 3, connecting ring; 4, waterproof joint assembly; 41, ring seat; 42, joint; 421, clamping jaw member; 4211, clamping jaw part; 4212, first thread part; 4213, second thread part; 4214, force applying part; 422, elastic member; 4221, first through slot; 4222, notch; 423, cap; 424, sealing ring; 425, plug; 6, elastic button; 61, convex eaves; 62, buckle; 63, abutting top; 64, deformation part; 65, reserved groove; 7, cover body. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0048] As Figure 1As shown in the figure, an interface structure according to an embodiment of the present utility model can be applied to devices such as a reference station to improve the waterproof performance of the network cable interface and adapt to more usage environments. The interface structure includes a housing 1, a network cable interface 21, and a waterproof joint assembly 4. The housing 1 has an installation end face 11, and a first through hole 111 is formed on the installation end face 11. The edge of the first through hole 111 extends in the direction of the outside of the housing 1 to form a connection ring 3. The network cable interface 21 is arranged inside the housing 1 and is aligned with the first through hole 111. The waterproof joint assembly 4 is hermetically connected to the inner wall of the connection ring 3. A wire passing channel is reserved inside the waterproof joint assembly 4 for clamping an external network cable, and both ends of the wire passing channel communicate with the outside and the network cable interface 21 respectively.

[0049] In this embodiment, a scheme of hermetically connecting the waterproof joint assembly 4 and the connection ring 3 is adopted. The connection ring 3 has a water-blocking function to prevent water from contacting and affecting the network cable interface and the electrical components inside the reference station. The waterproof joint assembly 4 is used to clamp the network cable accessing the network cable interface 21 and has the functions of positioning the network cable and waterproofing. The application range of the interface structure in this embodiment is wider and can be applicable to outdoor environments, etc., and can effectively prevent the situation that the reference station cannot work properly due to rainwater, snow water, etc. seeping into the reference station.

[0050] It should be noted that the hermetic connection can be a static seal or a dynamic seal, and hermetic connection can be carried out by means such as interference fit sealing, adding a sealant for sealing, oil sealing, etc.

[0051] For the convenience of installation and disassembly, in some alternative embodiments, please refer to Figure 1 , the waterproof joint assembly 4 includes a ring seat 41 and a joint 42. The outer wall of the ring seat 41 is hermetically connected to the inner wall of the connection ring 3. The ring seat 41 and the joint 42 are detachably connected. A wire passing channel is reserved inside the joint 42. The joint 42 is used to hermetically clamp the network cable. When connecting the network cable, the joint 42 is first detached from the ring seat 41, the network cable is clamped into the wire passing channel of the joint 42, and the network cable connector is inserted into the network cable interface 21.

[0052] The detachable connection method between the ring seat 41 and the joint 42 can be but is not limited to threaded connection, linear snap-in connection, etc. For example, the connection between the ring seat 41 and the joint 42 is a threaded connection. The ring seat 41 is a nut member with internal threads, and one end of the joint 42 has external threads that are adapted to the nut member.

[0053] Optionally, in order to hermetically connect the ring seat 41 and the connection ring 3, for example, the ring seat 41 is a nut member formed by secondary injection molding. The nut member can be a metal part with a plastic layer coated on the outside, and there is an interference fit between the ring seat 41 and the connection ring 3.

[0054] Optionally, the connection between the ring base 41 and the connecting ring 3 is a snap connection. One of the ring base 41 and the connecting ring 3 has an annular groove, and the other has a convex ring adapted to the groove. The convex ring is clamped in the groove, so that the ring base 41 can be axially positioned within the connecting ring 3.

[0055] In some alternative embodiments, please refer to Figure 1 and Figure 2 joint 42 includes a jaw member 421, an elastic member 422 and a cap 423. The interior of the jaw member 421 is hollow. Along the axial direction, the jaw member 421 is successively formed with a jaw portion 4211, a first threaded portion 4212 and a second threaded portion 4213. The second threaded portion 4213 is threadedly connected to the ring base 41. The first threaded portion 4212 is threadedly connected to the cap 423. The jaw portion 4211 can be deformed under the pressing of the cap 423. The elastic member 422 is placed inside the jaw portion 4211, and an axial first through groove 4221 is formed inside the elastic member 422.

[0056] The cap 423 is provided with an opening. The hollow interior of the jaw member 421, the first through groove 4221 of the elastic member 422 and the opening of the cap 423 cooperate to form a wire passing channel of the joint 42.

[0057] When inserting the network cable into the joint 42, first pass the network cable through the jaw member 421 and the cap 423, then insert the network cable into the first through groove 4221 of the elastic member 422, stuff the elastic member 422 into the jaw portion 4211, and then screw the cap 423 onto the first threaded portion 4212. The cap 423 presses the jaw portion 4211 to make the jaw portion 4211 tighten. The jaw portion 4211 tightens and squeezes the elastic member 422, so that the elastic member 422 clamps the network cable to achieve the clamping function. After that, screw the second threaded portion 4213 of the jaw member 421 into the ring base 41 to complete the connection.

[0058] When the cap 423 presses the jaw portion 4211, the jaw portion 4211 deforms and contracts inward, thereby pressing the elastic member 422. When the cap 423 leaves the jaw portion 4211, the jaw portion 4211 returns outward and releases the elastic member 422.

[0059] Optionally, in order to facilitate the insertion of the network cable into the first through groove 4221 of the elastic member 422, the elastic member 422 has a radial cut 4222, and the network cable can be inserted into the first through groove 4221 after passing through the cut 4222.

[0060] Optionally, as Figure 2The jaw member 421 shown in [Figure] is hollow inside. Along the axial direction, the jaw member 421 is successively distributed with a jaw portion 4211, a first threaded portion 4212, a force - applying portion 4214, and a second threaded portion 4213. The force - applying portion 4214 facilitates the installer to hold and apply force for rotation. The force - applying portion 4214 can be, but is not limited to, a multi - faceted prism shape, which can be used in cooperation with an external tool to increase the torque for easy rotation.

[0061] The jaw portion 4211 can be multiple axially - extending claw bodies. The multiple claw bodies are arranged at circumferential intervals, and the end of the jaw portion 4211 can contract towards the axis.

[0062] Optionally, as Figure 2 shown in [Figure], the connector 42 further includes a sealing ring 424. The sealing ring 424 is arranged between the force - applying portion 4214 and the ring base 41 to improve the sealing performance of the waterproof connector assembly 4.

[0063] In some alternative embodiments, the inside of the cap 423 has a guiding surface. The guiding surface can be an arc surface or an inclined surface. The guiding surface gradually converges towards the opening of the cap 423. The guiding surface is used to press or release the jaw portion 4211 to control the tightening and loosening of the jaw portion 4211.

[0064] Optionally, as Figure 2 shown in [Figure], the connector 42 further includes a plug 425. The plug 425 is detachably inserted into the first through - slot 4221. When the interface structure is not in use, that is, when the network cable is not connected, the plug 425 can be used to block the first through - slot 4221 to prevent external water from seeping in through the first through - slot 4221.

[0065] In some alternative embodiments, as Figure 3 shown in [Figure], since when inserting the network cable, usually the user holds the connector of the network cable and inserts it into the network cable interface 21, the inner - diameter size of the inner circle of the ring base 41 needs to allow the thumb and index finger holding the network cable connector to enter. To reduce the insertion difficulty and improve the user experience, the inner - diameter of the inner circle of the ring base 41 is L1, and 24 mm ≤ L1 ≤ 30 mm. In this range, while ensuring that the thumb and index finger holding the network cable connector can enter, the volume of the interface structure is reduced as much as possible.

[0066] In some alternative embodiments, as Figure 4 shown in [Figure], since when inserting the network cable, usually the user holds the connector of the network cable and inserts it into the network cable interface 21, the depth of the network cable interface 21 cannot be too deep, preferably not exceeding the second phalanx of the index finger. To facilitate the insertion of the network cable and improve the user experience, the distance between the end surface on the side of the connecting ring 3 away from the network cable interface 21 and the network cable interface 21 is L2, and 10 mm ≤ L2 ≤ 20 mm. In this range, while ensuring that the network cable can be inserted flexibly and the water - blocking effect of the connecting ring 3, the volume of the connecting ring 3 is reduced as much as possible.

[0067] As shown in Figure 1 In the figure, an embodiment of the utility model provides a reference station, which is used to provide high-precision reference data and real-time correction information, so that a rover station can quickly and accurately determine its own position.

[0068] The reference station may include a housing 01 and a circuit board 2 arranged inside the housing 01, and also includes any of the above-mentioned interface structures. The housing 1 is a part of the housing 01, and the network cable interface 21 is electrically connected to the circuit board 2.

[0069] Optionally, as shown in Figure 3 In the figure, the housing 01 may include a housing 1 and a cover 7, and the housing 1 and the cover 7 are covered with each other.

[0070] Optionally, the housing 1 can also be regarded as a partial structure of the housing 01. For example, the reference station may include two of the above-mentioned interface structures, both of which are located on the same housing 01, as shown in Figure 1 In the figure.

[0071] In order to improve the waterproof function of the switch 22 on the reference station, in some alternative embodiments, please refer to Figures 5 to 7 collectively. A switch 22 is electrically connected to the circuit board 2, a button slot 12 is formed on the housing 1, a second through hole 124 is opened in the button slot 12, and the switch 22 is aligned with the second through hole 124. An elastic button 6 is arranged in the button slot 12. The elastic button 6 is arranged in the button slot 12, and the elastic button 6 is in interference fit with the groove wall of the button slot 12. The elastic button 6 can be deformed to press or leave the switch 22.

[0072] The elastic button 6 can be made of, but not limited to, elastic materials such as rubber and silica gel.

[0073] The switch 22 can be a linear travel switch. The switch 22 can be a reset switch.

[0074] Optionally, the button slot 12 is located on the installation end face 11 and between two first through holes 111.

[0075] In some alternative embodiments, as shown in Figure 6 and Figure 7 In the figure, a clamping hole 123 is opened in the button slot 12, and a buckle 62 protrudes from the elastic button 6, and the buckle 62 is buckled into the clamping hole 123. The detachable installation function of the elastic button 6 is realized, and no other connecting parts need to be added.

[0076] The buckle 62 can undergo elastic deformation. The size of the buckle 62 is larger than that of the clamping hole 123. It can be pressed into the clamping hole 123 by extrusion deformation, and the buckle 62 is limited after restoration.

[0077] In an alternative embodiment, the number of buckles 62 protruding from the elastic button 6 is two. Two card holes 123 are correspondingly formed in the button slot 12. The two card holes 123 are respectively located at both ends of the second through hole 124, and the buckles 62 and the card holes 123 are snap-fitted one by one. This embodiment can improve the stability of the elastic button 6 installed in the button slot 12 and prevent the elastic button 6 from being displaced and rotated.

[0078] Since the elastic button 6 controls the switch 22 by pressing, when the elastic button 6 is pressed, the elastic button 6 deforms. When the elastic button 6 deforms, external water flow may seep into the reference station through the gap between the elastic button 6 and the button slot 12, affecting the normal use of the reference station.

[0079] In some alternative embodiments, to solve the above problems and further improve the waterproof performance of the elastic button 6, as Figure 6 and Figure 7 shown, a convex eaves 61 is formed on the outer circle of the elastic button 6, and the convex eaves 61 is in interference fit with the groove wall of the button slot 12. Waterproofing of the outer circle of the button slot 12 is achieved.

[0080] A water retaining rib 121 is convexly provided in the button slot 12, and the water retaining rib 121 is located on the outer periphery of the second through hole 124. Waterproofing of the inner circle of the button slot 12 is achieved without affecting the pressing of the switch 22.

[0081] As Figure 5 shown, the internal space enclosed by the water retaining rib 121 is a stroke cavity 122, and the setting of the stroke cavity 122 facilitates the deformation of the elastic button 6.

[0082] A reserved groove 65 is concavely formed on the end face of the elastic button 6 facing the button slot 12. The water retaining rib 121 is located in the reserved groove 65, and the water retaining rib 121 closely adheres to the side wall of the reserved groove 65.

[0083] The groove wall of the reserved groove 65 facing the switch 22 is a deformation part 64, and the deformation part 64 can deform under the action of an external force. The deformation part 64 can be in the form of a thin film.

[0084] The deformation part 64 extends towards the switch 22 to form an abutting top 63. The abutting top 63 passes through the second through hole 124, and the abutting top 63 is used to press or leave the switch 22.

[0085] The reserved groove 65 is used to give the deformation part 64 a deformation space and the abutting top 63 a stroke space.

[0086] When the elastic button 6 is pressed, the deformation part 64 deforms towards the switch 22 under the action of an external force, and the abutting top 63 moves towards the switch 22 until the switch 22 is pressed. When the external force is removed, the deformation part 64 resets, thereby driving the abutting top 63 away from the switch 22 to achieve reset.

[0087] In this way, when the elastic button 6 is pressed, the elastic button 6 deforms, the eaves 61 of the elastic button 6 presses against the groove wall of the button groove 12, and the side groove wall of the reserved groove 65 presses against the water retaining rib 121. Both the inner ring and the outer ring are in a state of interference fit, effectively preventing the problem that water may seep in when the elastic button 6 is pressed.

[0088] The reference station may further include a vertical rod, and the machine case 01 is fixed on the vertical rod to facilitate the installation of the reference station outdoors.

[0089] The above are only the preferred embodiments of the present application, and do not impose any form of limitation on the present application. Although the present application has been disclosed above in the preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the technical content disclosed above within the scope of the technical solution of the present application. However, as long as it does not depart from the technical content of the technical solution of the present application, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still fall within the scope of the technical solution of the present application.

Claims

1. An interface structure, characterized in that: It includes a housing (1), a network cable interface (21), and a waterproof connector assembly (4); The housing (1) has an installation end face (11), and a first through hole (111) is formed on the installation end face (11). The edge of the first through hole (111) extends in the direction of the outside of the housing (1) to form a connection ring (3); The network cable interface (21) is arranged inside the housing (1), and the network cable interface (21) is aligned with the first through hole (111); The waterproof connector assembly (4) is hermetically connected to the inner wall of the connection ring (3); A wire passing channel is reserved inside the waterproof connector assembly (4) for clamping an external network cable, and both ends of the wire passing channel are respectively communicated with the outside and the network cable interface (21).

2. The interface structure according to claim 1, wherein: The waterproof connector assembly (4) includes a ring seat (41) and a connector (42); The outer wall of the ring seat (41) is hermetically connected to the inner wall of the connection ring (3); The ring seat (41) is detachably connected to the connector (42); The wire passing channel is reserved inside the connector (42).

3. The interface structure according to claim 2, characterized in that: The connector (42) includes a clamping jaw part (421), an elastic part (422), and a cap (423); The inside of the clamping jaw part (421) is hollow, and the clamping jaw part (421) is successively formed with a clamping jaw portion (4211), a first thread portion (4212), and a second thread portion (4213) along the axial direction; The second thread portion (4213) is threadedly connected to the ring seat (41); The first thread portion (4212) is threadedly connected to the cap (423); The clamping jaw portion (4211) can be deformed under the pressing of the cap (423); The elastic part (422) is placed inside the clamping jaw portion (4211), and a first through groove (4221) in the axial direction is formed inside the elastic part (422).

4. The interface structure according to claim 3, wherein: The connector (42) further includes a plug (425), and the plug (425) is detachably inserted into the first through groove (4221).

5. The interface structure according to claim 2, wherein: The inner diameter of the inner circle of the ring seat (41) is L1, and 24 mm ≤ L1 ≤ 30 mm.

6. The interface structure according to any one of claims 1 to 5, characterized in that: The distance from the end face on the side of the connection ring (3) away from the network cable interface (21) to the network cable interface (21) is L2, and 10 mm ≤ L2 ≤ 20 mm.

7. A reference station, characterized in that: It includes a machine shell (01) and a circuit board (2) arranged inside the machine shell (01), and further includes the interface structure as described in any one of claims 1 to 6. The housing (1) is a part of the machine shell (01), and the network cable interface (21) is electrically connected to the circuit board (2).

8. The reference station according to claim 7, characterized in that: A switch (22) is electrically connected to the circuit board (2); A button groove (12) is formed on the housing (1), a second through hole (124) is formed in the button groove (12), and the switch (22) is aligned with the second through hole (124); An elastic button (6) is arranged in the button groove (12). The elastic button (6) is arranged in the button groove (12), and the elastic button (6) is in interference fit with the groove wall of the button groove (12). The elastic button (6) can be deformed to press or leave the switch (22).

9. The reference station according to claim 8, wherein: A clamping hole (123) is formed in the button slot (12), and a buckle head (62) is protruded on the elastic button (6), and the buckle head (62) is buckled into the clamping hole (123).

10. The reference station according to claim 8 or 9, characterized in that: An outwardly convex eaves (61) is formed on the outer circumference of the elastic button (6), and the eaves (61) is in interference fit with the groove wall of the button slot (12); A water retaining rib (121) is protruded in the button slot (12), and the water retaining rib (121) is located on the outer circumference of the second through hole (124); A reserved groove (65) is formed by concaving the end face of the elastic button (6) on the side facing the button slot (12), the water retaining rib (121) is located in the reserved groove (65), and the water retaining rib (121) is closely attached to the side wall of the reserved groove (65); The groove wall of the reserved groove (65) facing the switch (22) is a deformation part (64), and the deformation part (64) can be deformed under an external force; The deformation part (64) extends towards the switch (22) to form an abutting top (63), the abutting top (63) passes through the second through hole (124), and the abutting top (63) is used to press or leave the switch (22).

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