Dispensing structure and dispensing method for waterproof sensor

Abstract

The invention discloses an adhesive dispensing structure and an adhesive dispensing method for a waterproof sensor, and belongs to the technical field of sensors, the adhesive dispensing structure comprises a shell and an insert, the insert comprises a supporting body with a mounting cavity, a liquid injection hole and an observation hole, the liquid injection hole and the observation hole are formed in the supporting body, and the adhesive dispensing structure further comprises a plug body matched with the mounting cavity; the support body is fixed on the shell, and the liquid injection hole and the observation hole are respectively communicated with the mounting cavity; the plug body comprises a body assembled in the mounting cavity and a glue retaining groove formed in the body, and the glue retaining groove is communicated with the liquid injection hole and the observation hole; wherein an adhesive is injected into the adhesive retaining groove through the liquid injection hole so as to bond the body and the support body. The technical effects that the dispensing consistency is improved, and the operation efficiency and reliability are improved are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of sensors, and in particular relates to a glue dispensing structure and a glue dispensing method for waterproof sensors. Background Art

[0002] With the increasing popularity of sensors and their diverse application scenarios, waterproofing has become a key requirement in sensor design. In harsh environments such as high humidity, rain, or liquid splashing, a sensor's waterproofing performance is directly related to the device's reliability and service life. In existing technologies, a plastic plug is typically pressed from the outside into a pre-embedded metal insert in a plastic housing. The plug is mechanically positioned and sealed using the inner wall of the metal insert. Operators then manually apply glue to the bottom of the plastic plug from inside the housing to achieve a waterproof seal. However, manual glue dispensing methods suffer from poor consistency, and varying operator skill levels and experience lead to variations in glue dispensing volume and placement, directly impacting the reliability of the waterproofing effect. During the glue dispensing process, it's also difficult to confirm that the glue has fully filled the sealing area at the bottom of the plug, making it prone to leaks or insufficient glue dispensing, which can lead to excess glue overflow, wasteful material, and increased cleanup efforts. Furthermore, manual glue dispensing is complex, requiring precise control of glue dispensing volume and placement, making it difficult to operate, impacting the production efficiency and quality of waterproof sensors.

[0003] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the Invention

[0004] The technical problems to be solved by the present invention are poor consistency of dispensing, low operating efficiency and poor reliability.

[0005] In order to solve the above technical problems, the present invention provides a glue dispensing structure for a waterproof sensor, wherein the glue dispensing structure includes a shell and an insert, the insert includes a support body with an installation cavity, and an injection hole and an observation hole are arranged on the support body. The glue dispensing structure also includes a plug body matching the installation cavity, the support body is fixed to the shell, and the injection hole and the observation hole are respectively connected to the installation cavity; the plug body includes a main body assembled in the installation cavity and a glue groove arranged on the main body, and the glue groove is respectively connected to the injection hole and the observation hole; wherein the adhesive is injected into the glue groove through the injection hole to bond the main body and the support body.

[0006] Optionally, the number of the injection hole is one, the number of the observation holes is multiple, and the multiple observation holes and the one injection hole are distributed at intervals along the circumference of the support body.

[0007] Optionally, the multiple observation holes include a first channel, a second channel and a third channel, the first channel, the second channel and the third channel are respectively connected to the installation cavity, and the axis line connecting the first channel and the injection hole is perpendicular to the axis line connecting the second channel and the third channel.

[0008] Optionally, the installation cavity is communicated with the inner cavity of the shell.

[0009] Optionally, the glue groove is annular and is concavely formed in a direction away from the support body, the projection of the injection hole along the direction close to the glue groove is located inside the glue groove, and the projection of the observation hole along the direction close to the glue groove is located inside the glue groove.

[0010] Optionally, the support body is provided with a positioning groove in the installation cavity, and the main body is provided with a protrusion matching the positioning groove. When the main body is embedded in the installation cavity, the protrusion abuts against the positioning groove so that the glue retention groove is respectively connected with the liquid injection hole and the observation hole.

[0011] Optionally, the adhesive includes waterproof glue.

[0012] According to another aspect of the present invention, the present invention also provides a glue dispensing method for a waterproof sensor, the glue dispensing method includes the glue dispensing structure for a waterproof sensor, and also includes assembling the plug body into the installation cavity of the insert, and making the glue groove communicate with the liquid injection hole and the observation hole respectively; injecting adhesive into the glue groove through the liquid injection hole, and the adhesive flows along the extension path of the glue groove; monitoring the adhesive overflow status at the observation hole, and stopping the injection of the adhesive when the adhesive overflows from the observation hole; forming a waterproof sealing layer in the glue groove after the adhesive solidifies to bond the plug body and the insert.

[0013] Optionally, assembling the plug body into the mounting cavity of the insert includes pushing the main body of the plug body into the mounting cavity of the insert until the protrusion connected to the main body abuts against the positioning groove located on the support body, so that the glue retention groove is aligned with the injection hole and the observation hole respectively.

[0014] Optionally, injecting the adhesive into the glue groove through the injection hole includes injecting the adhesive into the glue groove from the injection hole at a preset pressure through a needle or a pneumatic dispensing machine.

[0015] Beneficial effects:

[0016] The present invention provides a glue dispensing structure for a waterproof sensor. The structure comprises an injection hole and an observation hole, both of which are interconnected with a mounting cavity, on a support body of an insert. The main body of the plug is assembled within the mounting cavity of the support body. A glue groove on the main body is interconnected with the injection hole and the observation hole, respectively. Adhesive is injected into the glue groove through the injection hole, thereby bonding the main body and the support body to each other through the adhesive. During the glue dispensing process, the operator can inject adhesive into the glue groove through the injection hole. The adhesive flows along the glue groove until it overflows through the observation hole, enabling visual monitoring of the glue dispensing process. This improves the adequacy and consistency of glue dispensing and the waterproof performance of the product. The operator can visually determine whether the glue has filled the gap through the observation hole, avoiding waterproof failure caused by local glue shortages. Furthermore, the injection hole is located on the outside of the housing, which facilitates ease of operation and improves production efficiency. Furthermore, by monitoring the adhesive overflow at the observation hole, the glue injection amount can be controlled, preventing excessive glue use and waste, thereby reducing product costs. This improves glue dispensing consistency, operational efficiency, and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of a glue dispensing structure for a waterproof sensor provided by an embodiment of the present invention.

[0019] Figure 2 A schematic structural diagram of a protrusion and a mounting cavity in a glue dispensing structure for a waterproof sensor provided in an embodiment of the present invention.

[0020] Figure 3 A structural schematic diagram of a glue groove in a glue dispensing structure for a waterproof sensor provided by an embodiment of the present invention.

[0021] Figure 4 A schematic structural diagram of a shell and a plug body in a glue dispensing structure for a waterproof sensor provided in an embodiment of the present invention.

[0022] Figure 5 A schematic structural diagram of a liquid injection hole and an observation hole in a glue dispensing structure for a waterproof sensor provided in an embodiment of the present invention.

[0023] Figure 6 A flow chart of a dispensing method for a waterproof sensor provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0025] In order to enable those skilled in the art to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0026] In the embodiments of this application, "at least one" refers to one or more; "a plurality" refers to two or more. In the description of this application, the terms "first," "second," "third," etc. are used only for the purpose of distinguishing descriptions and should not be understood as indicating or implying relative importance or order.

[0027] References to "one embodiment" or "some embodiments" described in this specification mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, in this specification, the terms "include", "comprise", "have" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways. It should be noted that in the embodiments of the present application, "and / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0028] It should be pointed out that, in the embodiment of the present invention, when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. At the same time, "connection" in the embodiment of the present application can also be understood as electrical connection, and the connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, A and B are connected, which can be either A and B directly connected, or A and B indirectly connected through one or more other electrical components. The terms "vertical", "horizontal", "left", "right" and similar expressions used in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the present invention.

[0029] A dispensing structure for a waterproof sensor provided in the first embodiment of the present invention is shown in FIG. Figures 1 to 5 As shown, Figure 1 : is a structural diagram of a dispensing structure for a waterproof sensor provided by an embodiment of the present invention. Figure 2 2 is a structural diagram of a protrusion 311 and a mounting cavity 211 in a dispensing structure for a waterproof sensor provided by an embodiment of the present invention. Figure 3 1 is a structural diagram of a glue groove 32 in a glue dispensing structure for a waterproof sensor provided by an embodiment of the present invention. Figure 4 This is a structural diagram of a housing 1 and a plug body 3 in a dispensing structure for a waterproof sensor provided by an embodiment of the present invention. Figure 5 Schematic diagram of the structure of the injection hole 2111 and the observation hole 2112 in a dispensing structure for a waterproof sensor provided by an embodiment of the present invention. The dispensing structure for a waterproof sensor provided by an embodiment of the present invention includes a housing 1, an insert 2, and a plug body 3. The support body 21 has a mounting cavity 211. The support body 21 is fixed to the housing 1. The injection hole 2111 and the observation hole 2112 are respectively provided on the support body 21. The injection hole 2111 and the observation hole 2112 are respectively communicated with the mounting cavity 211. The plug body 3 matches the mounting cavity 211. The plug body 3 includes a body 31 and a glue groove 32. The body 31 is assembled inside the mounting cavity 211. The glue groove 32 is provided on the body 31. The glue groove 32 is respectively communicated with the injection hole 2111 and the observation hole 2112. The adhesive 4 is injected into the glue groove 32 through the injection hole 2111 to bond the body 31 and the support body 21.

[0030] Among them, the installation cavity 211 of the support body 21 has a space for accommodating the plug body 3. The plug body 3 can be made of plastic material, the insert 2 can be made of metal material, the insert 2 can be cylindrical, and the insert 2 is located outside the shell 1. The insert 2 can be fixed to the shell 1 by laser welding or threaded fixing. The main body 31 and the installation cavity 211 can be matched with an interference fit or a clearance fit to improve the sealing effect. The injection hole 2111 and the observation hole 2112 are respectively opened on the support body 21.

[0031] During assembly, the main body 31 of the plug 3 can be first pressed into the installation cavity 211, and then the adhesive 4 can be slowly injected through the injection hole 2111, with the flow rate controlled within a certain range. The adhesive 4 will flow along the adhesive retention groove 32 and stop injecting adhesive when the adhesive 4 overflows from the observation hole 2112. The overflow can be monitored in real time through the observation hole 2112. By monitoring the overflow status of the adhesive 4 at the observation hole 2112, the injection amount can be controlled, thereby timely avoiding excessive use and waste of glue.

[0032] In this embodiment, the support body 21 of the insert 2 is provided with an injection hole 2111 and an observation hole 2112, which are interconnected with the mounting cavity 211. The main body 31 of the plug 3 is assembled within the mounting cavity 211 of the support body 21. The glue groove 32 located on the main body 31 is interconnected with the injection hole 2111 and the observation hole 2112, respectively. The adhesive 4 is injected into the glue groove 32 through the injection hole 2111, so that the main body 31 and the support body 21 are bonded to each other through the adhesive 4. In this way, during the glue dispensing process, the operator can inject the adhesive 4 into the glue groove 32 through the injection hole 2111. The adhesive 4 will flow along the glue groove 32 until it overflows from the observation hole 2112, enabling visual monitoring of the glue dispensing process, which is beneficial for improving the adequacy and consistency of glue dispensing and the waterproof performance of the product. The operator can visually determine whether the glue has filled the gap through the observation hole 2112, avoiding the situation where the waterproofing fails due to local glue shortage. Furthermore, the placement of injection port 2111 on the exterior of housing 1 facilitates operational convenience and improves production efficiency. Furthermore, by monitoring the overflow of adhesive 4 at observation port 2112, the injection volume is controlled, preventing excessive glue use and waste, thereby reducing product costs. This improves dispensing consistency, operational efficiency, and reliability.

[0033] In one embodiment, there is one injection hole 2111 and multiple observation holes 2112. The multiple observation holes 2112 and the single injection hole 2111 are spaced apart along the circumference of the support body 21. This allows adhesive 4 to flow synchronously in multiple directions along the adhesive retention groove 32 after being injected from the single injection hole 2111. For example, when adhesive 4 overflows from all of the observation holes 2112, it indicates that the adhesive 4 has fully covered the bonding surface between the body 31 and the support body 21. Multi-point monitoring allows for visual verification of the uniformity of adhesive 4 filling. Specifically, the multiple observation holes 2112 are spaced apart along the circumference of the support body 21, allowing operators to observe the overflow of adhesive 4 from different angles. When adhesive 4 uniformly overflows from the multiple observation holes 2112, it indicates that the adhesive 4 is evenly distributed within the adhesive retention groove 32, thus preventing waterproofing failure caused by localized adhesive shortages. Furthermore, the centralized injection of adhesive 4 from the single injection hole 2111, combined with monitoring from multiple observation holes 2112, allows for more precise control of the injection volume, reducing glue waste and improving the adequacy and consistency of glue dispensing.

[0034] In some embodiments, the plurality of observation holes 2112 include a first channel, a second channel, and a third channel. The first channel, the second channel, and the third channel are each interconnected with the mounting cavity 211. The axis connecting the first channel and the injection hole 2111 is perpendicular to the axis connecting the second channel and the third channel. When the plurality of observation holes 2112 can be three observation holes 2112, the three observation holes 2112 can be the first channel, the second channel, and the third channel. The axis connecting the first channel and the injection hole 2111 is perpendicular to the axis connecting the second channel and the third channel. This allows the overflow of the adhesive 4 to cover different directions. The axis connecting the first channel and the injection hole 2111 is perpendicular to the axis connecting the second and third channels, forming a cross-monitoring point in space. When the adhesive 4 overflows from the first channel, it indicates that the area near the first channel is full; when the adhesive 4 overflows from the second channel and the third channel, it indicates that the area near the second channel and the third channel is full, which can more comprehensively monitor the flow state of the adhesive 4 in the glue groove 32, avoid monitoring blind spots, and achieve more accurate control of the glue injection amount.

[0035] In some embodiments, the installation cavity 211 is interconnected with the inner cavity 11 of the shell 1. The interconnected installation cavity 211 and the inner cavity 11 can form an installation space for the cable, so that the interior of the inner cavity 11 of the shell 1 is connected to the outside through the cable. At the same time, during the dispensing process, when the glue pressure in the glue groove 32 reaches the threshold, the excess adhesive 4 can also flow into the inner cavity 11 of the shell 1 through the installation cavity 211 to form a secondary sealing layer. That is, after the adhesive 4 is injected into the glue groove 32, it can further flow into the gap of the inner cavity 11 of the shell 1, which will expand the filling range of the adhesive 4, not only sealing the connection between the plug body 3 and the support body 21, but also sealing the connection between the support body 21 and the shell 1, thereby improving the waterproof performance of the overall structure.

[0036] In some embodiments, the adhesive groove 32 is annular and recessed in a direction away from the support body 21. The projection of the injection hole 2111 on the adhesive groove 32 is located inside the adhesive groove 32 along a direction close to the adhesive groove 32, and the projection of the observation hole 2112 on the adhesive groove 32 is located inside the adhesive groove 32 along a direction close to the adhesive groove 32. This ensures that the adhesive 4 does not deviate from the path after being injected through the injection hole 2111. When the adhesive 4 flows along the groove, it is directly injected into the core areas of the adhesive groove 32. The filling status of the adhesive 4 in the adhesive groove 32 can be accurately monitored through each observation hole 2112, which helps improve the flow efficiency of the adhesive 4 and ensures that the adhesive 4 is quickly and evenly distributed.

[0037] In some embodiments, the support body 21 is provided with a positioning groove 212 inside the installation cavity 211, and a protrusion 311 is provided on the body 31. The protrusion 311 and the body 31 can be integrally formed, and the protrusion 311 and the positioning groove 212 match each other. When the body 31 is embedded in the installation cavity 211, the protrusion 311 and the positioning groove 212 abut against each other, so that the glue groove 32 is connected to the injection hole 2111 and the observation hole 2112 respectively. Figure 2 、 Figure 4 and Figure 5 As shown, the positioning groove 212 can be provided in the installation direction 5 of the plug body 3. That is, when the plug body 3 is assembled in the installation cavity 211 along the installation direction 5, the protrusion 311 will be blocked by the positioning groove 212, so that the protrusion 311 and the positioning groove 212 abut against each other, thereby positioning the plug body 3 in a fixed position in the installation cavity 211. When the protrusion 311 and the positioning groove 212 abut against each other, the communication relationship between the adhesive groove 32 and the injection hole 2111 and the observation hole 2112 is fixed, which can prevent abnormal flow path of the adhesive 4 caused by displacement of the plug body 3. At the same time, precise positioning helps to reduce assembly errors and improve production efficiency.

[0038] In some embodiments, adhesive 4 comprises waterproof glue, such as a polyurethane-based waterproof glue. During the glue injection process, the glue is injected into the glue groove 32 through the injection hole 2111. Its low surface tension evenly covers the metal-plastic interface. After curing, it forms a seamless sealing layer, which is more suitable for the use environment of waterproof sensors. If glue overflows from each observation hole 2112, it indicates that the glue groove 32 is full of waterproof glue, forming a complete waterproof sealing layer.

[0039] In order to provide a detailed description of a dispensing method for a waterproof sensor provided by the present invention, the above embodiment 1 provides a detailed description of a dispensing structure for a waterproof sensor. Based on the same inventive concept, the present application also provides a dispensing method for a waterproof sensor, see embodiment 2 for details.

[0040] See Figure 6 As shown, Figure 6 This is a flow chart of a dispensing method for a waterproof sensor provided by an embodiment of the present invention. A second embodiment of the present invention provides a dispensing method for a waterproof sensor, including the above-mentioned dispensing structure for a waterproof sensor, and further comprising the following steps:

[0041] Step S100: Assemble the plug body 3 into the mounting cavity 211 of the insert 2, and make the glue groove 32 communicate with the injection hole 2111 and the observation hole 2112 respectively;

[0042] In some embodiments, assembling the plug body 3 into the mounting cavity 211 of the insert 2 includes pushing the main body 31 of the plug body 3 into the mounting cavity 211 of the insert 2 until the protrusion 311 connected to the main body 31 abuts against the positioning groove 212 located on the support body 21, so that the glue retention groove 32 is aligned with the injection hole 2111 and the observation hole 2112 respectively.

[0043] Specifically, the plug body 3, comprising the main body 31 and the raised portion 311, is pushed axially into the mounting cavity 211 of the insert 2. During assembly, the outer wall of the main body 31 forms a clearance fit with the inner wall of the mounting cavity 211, while the raised portion 311 slides until it abuts and secures against the positioning groove 212. At this point, the adhesive retention groove 32 of the main body 31 aligns with the injection hole 2111 and the observation hole 2112 of the insert 2, forming the necessary channels for the flow of the adhesive 4.

[0044] Step S200: injecting adhesive 4 into the adhesive groove 32 through the injection hole 2111, and the adhesive 4 flows along the extension path of the adhesive groove 32;

[0045] In some embodiments, injecting the adhesive 4 into the adhesive groove 32 through the injection hole 2111 includes injecting the adhesive 4 into the adhesive groove 32 from the injection hole 2111 at a preset pressure through a needle or a pneumatic dispenser.

[0046] Specifically, a pneumatic dispensing machine can be used to automatically inject the adhesive 4 into the adhesive groove 32 through the injection hole 2111. The pressure of the dispensing machine can be set within a certain range of values ​​so that the adhesive 4 flows in a laminar state along the extension direction of the adhesive groove 32. Alternatively, by controlling the injection pressure of the needle tube, the flow rate of the adhesive 4 is quantitatively related to the cross-sectional area of ​​the adhesive groove 32, so that the adhesive 4 completely fills the adhesive groove 32 during the flow process without generating eddy currents. In addition, the inner wall of the adhesive groove 32 can also be provided with spiral guide lines to improve filling uniformity.

[0047] Step S300 , monitoring the overflow state of the adhesive 4 at the observation hole 2112 , and stopping the injection of the adhesive 4 when the adhesive 4 overflows from the observation hole 2112 ;

[0048] Specifically, a fiber optic sensor or CCD visual detection system can be installed outside the observation hole 2112 to detect the change in the light refractive index when the adhesive 4 overflows in real time. The refractive index change can be used as a basis for timely detection of the adhesive 4 overflow state, triggering the suspension of adhesive injection. Alternatively, the adhesive 4 overflow state at the observation hole 2112 can be manually observed to determine whether to stop the injection of adhesive 4 in a timely manner.

[0049] In step S400 , after the adhesive 4 solidifies, a waterproof sealing layer is formed in the adhesive groove 32 to bond the plug body 3 and the insert 2 .

[0050] Specifically, the plug body 3 and the insert 2 can be placed in a constant temperature box and kept warm for a certain period of time under a certain environment to allow the adhesive 4 to complete its curing reaction and form a waterproof sealing layer in the adhesive groove 32. Alternatively, the plug body 3 and the insert 2 can be placed in an open area to allow the adhesive 4 to solidify naturally, so that the plug body 3 and the insert 2 are bonded and fixed to each other.

[0051] The present invention provides a method for dispensing glue for a waterproof sensor. The method involves assembling a plug body 3 into a mounting cavity 211 of an insert 2, connecting a glue groove 32 to a liquid injection hole 2111 and an observation hole 2112. Adhesive 4 is injected into the glue groove 32 through the liquid injection hole 2111, and the adhesive 4 flows along the extension path of the glue groove 32. The overflow state of the adhesive 4 at the observation hole 2112 is monitored. When the adhesive 4 overflows from the observation hole 2112, the injection of the adhesive 4 is stopped. After the adhesive 4 solidifies, a waterproof sealing layer is formed in the glue groove 32, thereby bonding the plug body 3 and the insert 2. In this way, during the dispensing process, the operator can inject the adhesive 4 into the glue groove 32 through the liquid injection hole 2111, and the adhesive 4 flows along the glue groove 32 until it overflows from the observation hole 2112. This allows for visual monitoring of the dispensing process, which is beneficial for improving the adequacy and consistency of the dispensing process, as well as the waterproof performance of the product. Through observation hole 2112, the operator can visually determine whether the gap is filled with glue, thus avoiding waterproofing failure caused by local glue shortages. Furthermore, the placement of injection hole 2111 on the exterior of housing 1 facilitates operational convenience and improves production efficiency. Furthermore, by monitoring the overflow of adhesive 4 at observation hole 2112, the injection amount can be controlled, preventing excessive glue use and waste, thus reducing product costs. This improves dispensing consistency, operational efficiency, and reliability.

[0052] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A dispensing structure for a waterproof sensor, characterized in that: The glue dispensing structure includes a shell and an insert, the insert includes a support body with an installation cavity, an injection hole and an observation hole arranged on the support body, the glue dispensing structure also includes a plug body matching the installation cavity, the support body is fixed to the shell, the injection hole and the observation hole are respectively connected to the installation cavity; the plug body includes a main body assembled in the installation cavity and a glue groove arranged on the main body, the glue groove is respectively connected to the injection hole and the observation hole; wherein the adhesive is injected into the glue groove through the injection hole to bond the main body and the support body.

2. The dispensing structure for waterproof sensor according to claim 1, characterized in that: There is one injection hole and a plurality of observation holes, and the plurality of observation holes and the one injection hole are spaced apart and distributed along the circumference of the support body.

3. The dispensing structure for waterproof sensor according to claim 2, characterized in that: The multiple observation holes include a first channel, a second channel and a third channel. The first channel, the second channel and the third channel are respectively connected to the installation cavity. The axis line connecting the first channel and the injection hole is perpendicular to the axis line connecting the second channel and the third channel.

4. The dispensing structure for waterproof sensor according to claim 1, characterized in that: The installation cavity is communicated with the inner cavity of the shell.

5. The dispensing structure for waterproof sensor according to claim 1, characterized in that: The glue groove is annular, and is concavely formed in a direction away from the support body. The projection of the injection hole along the direction close to the glue groove is located in the glue groove, and the projection of the observation hole along the direction close to the glue groove is located in the glue groove.

6. The glue dispensing structure for a waterproof sensor according to claim 1, characterized in that: The support body is provided with a positioning groove in the installation cavity, and the main body is provided with a protrusion matching the positioning groove. When the main body is embedded in the installation cavity, the protrusion abuts against the positioning groove, so that the glue retention groove is connected with the liquid injection hole and the observation hole respectively.

7. The dispensing structure for waterproof sensor according to claim 1, characterized in that: The adhesive comprises waterproof glue.

8. A dispensing method for a waterproof sensor, characterized in that: The dispensing method includes the dispensing structure for a waterproof sensor according to any one of claims 1 to 7, and further includes Assemble the plug body into the installation cavity of the insert, and make the glue groove communicate with the injection hole and the observation hole respectively; Injecting adhesive into the adhesive groove through the injection hole, and the adhesive flows along the extension path of the adhesive groove; monitoring an overflow state of the adhesive at the observation hole, and stopping the injection of the adhesive when the adhesive overflows from the observation hole; After the adhesive is solidified, a waterproof sealing layer is formed in the adhesive groove to bond the plug body and the insert.

9. The dispensing method for a waterproof sensor according to claim 8, characterized in that: Assembling the plug body into the mounting cavity of the insert includes pushing the main body of the plug body into the mounting cavity of the insert until the protrusion connected to the main body abuts and cooperates with the positioning groove located on the support body, so that the glue retention groove is aligned with the injection hole and the observation hole respectively.

10. The dispensing method for a waterproof sensor according to claim 8, characterized in that: Injecting the adhesive into the adhesive groove through the injection hole includes injecting the adhesive into the adhesive groove from the injection hole at a preset pressure through a needle or a pneumatic dispensing machine.

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