A waterproof structure for a vehicle-mounted terminal

Abstract

The utility model relates to a waterproof structure for vehicle terminal, including interlock lower shell, upper cover, be provided with electronic components in the lower shell, the lower shell is provided with display screen, USB joint, button periphery, and the bottom of lower shell is equipped with the placement part, the placement part includes magnet body, magnet body is covered through silica rubber layer, the lower bottom surface of lower shell has the mounting cavity A that is concave upwards, magnet body is placed in mounting cavity A, and is out from the inside of lower shell with magnet body screw thread cooperation through corresponding screw, and silica rubber layer and mounting cavity A contact each other and form the sealed structure, and the cap head department of corresponding screw is coated with seal glue, the utility model reaches the beneficial effect is: have excellent waterproof effect, and also easier to disassemble under the condition of having excellent waterproof effect.

Description

Technical Field

[0001] This utility model relates to the field of vehicle-mounted terminal technology, and in particular to a waterproof structure for vehicle-mounted terminals. Background Technology

[0002] The application of in-vehicle terminals is becoming increasingly widespread, with various demands emerging one after another. However, existing in-vehicle terminals still have many shortcomings, such as the fixation of the terminal, waterproofing, and the fixation between the terminal and the vehicle. Since many functional components of the terminal are electronic products, the requirements for waterproofing are particularly high, making the waterproofing of the terminal especially important.

[0003] The highest waterproof rating for general electronic components is IP68. Therefore, when selecting automotive products for protection, an IP68 rating should also be chosen to minimize the risk. Currently, due to insufficient waterproof design, many companies use non-removable methods such as ultrasonic welding, brazing, and potting for waterproofing; however, this results in high manufacturing costs and inconvenience in subsequent repairs.

[0004] To address this, our company has designed a new type of terminal waterproof structure that meets waterproofing standards while controlling manufacturing costs, and is particularly convenient for future repairs. Summary of the Invention

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a vehicle-mounted terminal waterproof structure that is easy to disassemble and repair and has a good sealing effect, thus solving the problem that although the existing terminals have a good waterproof effect, they cannot be disassembled and repaired.

[0006] It should be noted that the following situations are prone to poor waterproofing: ① To facilitate installation between the vehicle terminal and the vehicle, the terminal is often attached to the vehicle using magnets; if the magnet is directly fixed to the terminal with glue, the magnet is easy to fall off when the glue fails, so screws are needed to fix the magnet to the terminal housing; due to the limited thickness of the terminal housing, the screws often penetrate the terminal housing during fixing, which makes it difficult to seal the installation point between the magnet and the terminal housing, resulting in poor waterproofing (leaking is very likely to occur when placed in water). ② Conventional display screen installation involves directly bonding the screen to the terminal housing using adhesive backing and waterproof glue. However, sometimes the waterproof glue may not adhere evenly to all parts of the screen. After bonding and installation, some terminals may not be waterproof in this area (and may easily leak when placed in water). ③ In addition, current USB connectors typically use threaded connectors and O-rings for sealing (this sealing rating can only reach IP37, where the second number indicates the liquid protection rating, ranging from 0 to 8, with higher numbers indicating higher protection ratings); because USB interfaces are frequently plugged and unplugged, the threads may rotate slightly, causing the O-ring seal to loosen and fail to achieve a good sealing effect. ④ In addition, when sealing the lower and upper shells of a traditional terminal, sealing gaskets are often used for sealing and fastening. However, due to the long length of the ring, gaps can easily appear at certain points.

[0007] Based on the above findings, the waterproof structure has been redesigned in this invention.

[0008] The purpose of this utility model is achieved through the following technical solution: a waterproof structure for a vehicle terminal, including a lower shell and an upper cover that are interlocked, electronic components are provided inside the lower shell, and a display screen, a USB connector and buttons are provided around the lower shell, and a placement part is provided at the bottom of the lower shell. The placement part includes a magnet body; the magnet body is covered with a silicone rubber layer; The lower bottom surface of the lower shell has an upwardly recessed mounting cavity A; The magnet is placed inside the mounting cavity A and is threaded through the lower shell by corresponding screws; the silicone rubber layer is in contact with the mounting cavity A to form a sealed structure, and the head of the corresponding screw is coated with sealant.

[0009] Because the screws are not long enough when the magnet is installed, the sealing effect is insufficient; therefore, a seal is achieved by having a silicone rubber layer adhere to the inner wall of the mounting cavity A.

[0010] As a preferred technical solution of this application, the lower shell has an inwardly recessed mounting cavity B on its peripheral sidewall, and a display screen is provided in the mounting cavity B; the back of the display screen is in contact with the wall of the mounting cavity B; on the back of the display screen, from the center outward, there are an inner ring adhesive area, an annular groove, a back adhesive area, and an outer ring adhesive area; the inner ring adhesive area is coated with M strong waterproof adhesive, the back adhesive area has back adhesive, and the outer ring adhesive area is coated with high-density waterproof adhesive; when the display screen is in contact with the wall of the mounting cavity B, part of the M strong adhesive is squeezed into the annular groove to form a waterproof rubber ring.

[0011] Because the waterproofing effect of the bonding method of the display screen in general vehicle terminals is not sufficient, especially when the terminal gets hot, it is easy to cause the bonding joint to fail to seal properly. This solution sets up multiple bonding areas for bonding, and most importantly, it sets up annular grooves. M strong waterproof adhesive will accumulate in the annular grooves, so that the sealing effect of the entire display screen is good.

[0012] As a preferred technical solution of this application, the peripheral sidewall of the lower shell has an inwardly recessed mounting cavity C, and a USB connector is installed in the mounting cavity C; the USB connector is flat-headed, with its front and rear ends being a USB port end and an insertion section, respectively, and a stepped surface is formed between the two; after placing an annular ring on the stepped surface, the insertion section is inserted into the lower shell and a connecting block is fixed thereon, and the connecting block is fixedly connected to the lower shell by a corresponding bolt rod.

[0013] The USB connector is designed with a flat head structure and is fixedly connected to the lower shell via a connecting block; this prevents the USB connector from rotating and ensures that the corresponding ring will not deform or loosen due to the rotation of the USB connector.

[0014] Furthermore, the USB connector is also blocked at the mounting cavity C by a waterproof block; the waterproof block is a rubber block with elastic telescopic pins at its upper and lower positions; the upper and lower walls of the mounting cavity C have corresponding pin holes. The protruding end of the elastic telescopic pin is a ball end, which normally fastens into the mounting cavity C, thus ensuring a good seal for the USB connector.

[0015] As a preferred technical solution of this application, the lower shell and the upper cover are fastened together by a gasket; an annular rubber layer is glued to the inner wall of the upper edge of the lower shell; the edge of the annular rubber layer is higher than the upper edge of the lower shell; the upper cover has an annular groove that is adapted to be inserted into the annular rubber layer.

[0016] When the lower shell and upper cover are fastened together, the matching insertion of the annular rubber layer and annular groove can achieve a better sealing effect.

[0017] As a preferred technical solution of this application, the lower shell has a long threaded post, and the lower shell is threadedly engaged with the upper cover via the long threaded post and a corresponding screw. The long threaded post is installed using a long screw, and when the long screw engages with the corresponding threaded hole, it itself has a good sealing effect (the threaded contact surface is larger compared to a short screw).

[0018] As a preferred technical solution of this application, the lower shell has an air hole at its center, which is plugged by a rubber plug.

[0019] It should be noted that this solution does not describe many structural features of the vehicle-mounted terminal, such as buttons, the small cover at the bottom of the lower casing, and the aviation connector. These undescribed structures are existing technologies, and even with conventional designs, they provide good waterproofing. Therefore, this solution only describes the improvements made to the vehicle-mounted terminal.

[0020] This utility model has the following advantages: (1) The bottom of the terminal has a good sealing effect and is easy to disassemble and replace the demagnetized magnet; Vehicle-mounted terminals (vehicle-mounted satellite terminals) are placed in vehicles, so they are often placed using magnetic adsorption. However, the general installation of magnets and terminals has some drawbacks: ① The magnets are fixed to the bottom of the lower housing with strong adhesive, but it is difficult to replace them when they are demagnetized; ② They are installed with screws, which pass through the housing from the inside out and are fixed to the magnets. However, because the screws are short, gaps are very easy to be created when installing them with threads. Therefore, in this solution, an installation cavity A is opened at the bottom of the lower shell, a magnet is placed in the installation cavity, the surface of the magnet is covered with a silicone rubber layer, and then a screw is used to pass through from the inside of the lower shell to the outside and to fix and connect with the magnet. The head of the screw is coated with sealant. This design provides excellent sealing: the silicone rubber layer adheres to the wall of mounting cavity A for sealing; and the sealant at the screw cap provides further sealing. This design facilitates disassembly for replacement of the demagnetized magnet: since the sealant at the cap is exposed, after opening the top and bottom covers, the sealant can be strengthened by high-temperature baking or chemical adhesive remover, and then the screws can be unscrewed (in the traditional method of using strong adhesive, the strong adhesive is hidden, making it difficult to remove and disassemble the magnet). (2) The installation site of the display screen is waterproof and easy to remove; Traditional displays are sealed directly with adhesive backing and waterproof glue. However, because the back of the display has a large area, it cannot be guaranteed that all adhesive joints are seamless, and the sealing pass rate in this area is not particularly good. In this solution, high-density waterproof adhesive and 3M strong waterproof adhesive are applied around the outer and inner sides of the adhesive backing, respectively; then an annular groove is also made. When the adhesive is applied, some of the 3M strong waterproof adhesive will be squeezed into the annular groove, thus forming a waterproof rubber ring in the annular groove. The waterproof rubber ring is particularly effective at waterproofing. In this solution, a chemical adhesive remover can be injected through the lead wire opening, making it easier to disassemble the display screen; (3) The USB interface has a good sealing effect; Traditional USB connectors often use threaded connections for fixing. During the repeated plugging and unplugging of the USB connector and the external plug, the threaded joint can easily rotate, resulting in the ring not being properly compressed and sealed. In this solution, the USB connector is directly fixed in place. No matter how the external plug is plugged in or unplugged, the USB connector and the ring can maintain a good clamping state, thereby ensuring a good seal. (4) The lower shell and the upper cover have a good sealing effect; Traditionally, the lower shell and upper cover are sealed by pressing with a sealing gasket, but because the circumferential seal has a long length, a good seal cannot be guaranteed. In this design, the annular rubber and the annular groove of the upper cover cooperate with each other. Since the annular rubber has a certain deformation, it has a good sealing effect when the lower shell and the upper cover are fastened together. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the present invention from a stylistic perspective; Figure 2 This is a top view of the structure of this utility model; Figure 3 This is a schematic diagram of the structure between mounting cavity A and the magnet body; Figure 4 This is a schematic diagram of the structure between the magnet and the silicone rubber layer; Figure 5 This is a schematic diagram of the structure between mounting cavity B and the display screen; Figure 6 A structural diagram showing the division of the back area of ​​the display screen; Figure 7 A schematic diagram showing the connection between the USB connector block and the outer shell; Figure 8 This is a schematic diagram of the USB structure; Figure 9 This is a structural diagram of the other corner of the USB port; Figure 10 This is a schematic diagram of the structure between the mounting cavity C and the waterproof block; Figure 11 This is a schematic diagram of the upper cover structure; In the diagram: 1-lower shell, 11-mounting cavity A, 12-mounting cavity B, 13-mounting cavity C, 131-pin hole, 14-annular rubber, 15-long threaded hole post; 2-Top cover, 21-Annular slot; 3-Display screen, 31-Inner ring adhesive area, 32-Annular groove, 321-Annular groove, 33-Back adhesive area, 34-Outer ring adhesive area; 4-USB connector, 41-connector block, 42-waterproof block, 421-elastic telescopic pin; 51-Magnet body, 52-Silicone rubber layer. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the following description.

[0023] It should be noted that the orientation or positional relationship indicated by terms such as "left" and "right" is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of this invention is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. Such terms are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0025] It should be noted that this implementation method primarily targets vehicle-mounted satellite terminals, and only improves the structures with poor waterproofing, specifically the bottom mounting section, display screen, USB connector, and housing fasteners. The structural and installation designs are addressed in these areas. Other parts not described in detail are existing technologies and can be designed using conventional approaches (e.g., buttons, small covers on the bottom of the lower housing, aviation connectors, etc.). Of course, the corresponding waterproofing approach of this terminal can also be used for shipborne satellite terminals and satellite terminals on other carriers, but it is more suitable for vehicle-mounted applications.

[0026] like Figures 1-4 As shown, the waterproof structure for a vehicle terminal proposed in this embodiment includes a lower shell 1 and an upper cover 2 that are interlocked. Electronic components are disposed inside the lower shell 1, and a display screen 3, a USB connector 4, etc., which are electrically connected to the electronic components are disposed around the lower shell 1. The lower shell 1 has a placement part at its bottom; Specifically, the structure of the mounting cavity is as follows: multiple upwardly recessed mounting cavities A11 are provided near the outer edge of the bottom surface of the lower shell 1. A magnet body 51 is placed inside the mounting cavity A11, and the magnet body 51 is covered with a silicone rubber layer 51. A threaded hole is provided at the center of the mounting cavity A11, and a corresponding screw is inserted downward from the inside of the lower shell 1. The screw is threadedly engaged with the magnet body 51, thus fixing the magnet body 51. After the magnet body 51 is locked and fixed, the silicone rubber layer 51 and the mounting cavity A11 are tightly fitted, which is equivalent to achieving a seal. Then, glue is used to seal the head of the corresponding screw. Traditionally, the magnet 51 is fixed to the bottom of the lower shell 1 with strong adhesive (because the magnetic force must be overcome when handling the terminal, so strong fixation is required). However, it is difficult to replace the magnet 51 when it is demagnetized. Alternatively, screws can be used for installation, but because the screws are short, gaps are very easy to be created during threaded installation. In this solution, the silicone rubber layer 52 is bonded to the mounting cavity A11, and the corresponding screw heads are coated with sealant, achieving a good sealing effect. Moreover, this seal is easy to disassemble. When disassembling, the sealant can be easily removed by baking at high temperature or by some chemical means (strong adhesive is not easy to remove, mainly because the cleaning adhesive is hidden in the bonding surface and is difficult to remove, while the sealant in this solution is exposed).

[0027] See figure Figure 5 and Figure 6 The installation of display screen 3 was designed; Specifically, the lower shell 1 has an inwardly recessed mounting cavity B12 on its peripheral sidewall, and a display screen 3 is provided in the mounting cavity B12, with the back of the display screen 3 fitting against the wall of the mounting cavity B12. On the back of the display screen 3, the center is the screen area, and an annular groove 32 is formed around the screen area (this does not mean that the groove is annular, but that it is formed around the screen area; the term "annular" in this paragraph has the same meaning). The area between the annular groove 32 and the screen area is the inner ring adhesive area 31, the area adjacent to the outer edge of the annular groove 32 is the back adhesive area 33, and the area around the back adhesive area 33 is the outer ring adhesive area 34 (except for the annular groove 32, which is an actual structure, the inner ring adhesive area 31, the back adhesive area 33, and the outer ring adhesive area 34 are all artificially defined areas for the convenience of later description). The inner ring adhesive area 31 is coated with 3M strong waterproof adhesive, the back adhesive area 33 has back adhesive, and the outer ring adhesive area 34 is coated with high-density waterproof adhesive. During the bonding process of the display screen 3, the adhesive on the backing area 33 is mainly used for bonding. The inner ring and the outer ring of the bonding area are sealed with 3M strong waterproof adhesive and high-seal waterproof adhesive respectively. During the bonding process, the 3M strong waterproof adhesive is squeezed into the annular groove 32, thus forming a waterproof adhesive ring. This design has a very good waterproof effect. In addition, a lead wire port is provided at mounting cavity B12 for the lead wire of display screen 3. Figure 5 and Figure 6 A portion of the back of the display screen 3 extends into the housing 1 through the lead wire port; when disassembling the display screen 3, the corresponding chemical adhesive remover is injected through the lead wire port, and after standing for a period of time, the display screen 3 can be disassembled relatively easily.

[0028] See Figures 7-10 The structure and installation of USB connector 4 were designed. Specifically, the lower shell 1 has an inwardly recessed mounting cavity C13 on its peripheral sidewall, and a USB connector 4 is installed in the mounting cavity C13; wherein, the USB connector 4 is flat-headed, and the front and rear ends of the USB connector 4 are the USB port end and the insertion end, respectively, and a stepped surface is formed between the USB port end and the insertion end. A flat socket adapted to the insertion section is opened on the wall of the mounting cavity C13; during installation, after placing an annular ring (referring to the ring that is set around the insertion section, not the O-type) on the stepped surface between the USB port end and the insertion section, the insertion section is inserted into the lower shell 1 through the flat socket. A connecting block 41 is fixed on the insertion section, and the connecting block 41 is fixedly connected to the inside of the lower shell 1 by the corresponding bolt rod. Because the USB connector 4 is designed with a flat head structure, the USB connector will not rotate when the corresponding cable is repeatedly plugged in and out; and because the USB connector is directly fixed to the lower shell 1 via the connecting block 41, the USB connector 4 is actually completely fixed. Therefore, even when the corresponding cable is repeatedly plugged in and out, the position between the USB connector 4 and the corresponding ring will not change, thus ensuring good sealing performance (traditional USB connectors are fixed to the shell by threads, and during repeated plugging and unplugging, the USB connector may rotate, which may cause the corresponding sealing ring to loosen).

[0029] Further, see Figure 10 In order to ensure that the USB connector 4 can achieve better connection when no cable is plugged in, a waterproof block 4 is used to seal the USB connector 4 inside the installation cavity C13. Specifically, the waterproof block 42 is a rubber block whose shape is adapted to the mounting cavity C13; elastic telescopic pins 421 are respectively provided at the upper and lower positions of the waterproof block 42, and the protruding end of the elastic telescopic pin 421 is a ball head; corresponding pin holes 131 are provided on the upper and lower walls of the mounting cavity C13. When the waterproof block 42 is blocked in the mounting cavity C13, its ball end extends into the small hole 131; when it is not necessary to block it, the waterproof block 42 can be pried out directly (because it is a ball end, it can be pried out relatively easily).

[0030] Generally speaking, the lower shell 1 and the upper cover 2 are fastened together by a gasket, but due to the long contact area, there may be a risk at a certain position, resulting in poor sealing; In this embodiment, see Figure 11 The fastening mechanism between the lower shell 1 and the upper cover 2 was also designed. Specifically, an annular rubber layer 14 is glued to the inner wall of the upper edge of the lower shell 1, and the edge of the annular rubber layer 14 is higher than the upper edge of the lower shell 1; in addition, the upper cover 2 has an annular slot 21 that is adapted to be inserted into the annular rubber layer 14.

[0031] After the lower shell 1 and the upper cover 2 are fastened together, the annular rubber layer 14 and the annular groove 21 are fitted together. Since the annular rubber layer 14 itself has a certain deformation, it can achieve a better sealing effect.

[0032] In this embodiment, see Figure 10 The lower shell 1 has a long threaded post 15, which is threaded to the upper cover 2 via a corresponding screw. The long threaded post 15 is installed using a long screw, and the long screw itself has a good sealing effect when it is engaged with the corresponding threaded hole (the threaded contact surface is larger than that of a short screw).

[0033] In this embodiment, the lower shell 1 has an air hole at its center, which is blocked by a rubber plug.

[0034] The above embodiments only illustrate preferred implementation methods, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A waterproof structure for a vehicle-mounted terminal, comprising a lower shell (1) and an upper cover (2) that interlock with each other, wherein electronic components are disposed inside the lower shell (1), and a display screen (3), a USB connector (4), and buttons are disposed circumferentially on the lower shell (1), and a placement part is provided at the bottom of the lower shell (1), characterized in that: The placement part includes a magnet (51); the magnet (51) is covered by a silicone rubber layer (52); The lower shell (1) has an upwardly recessed mounting cavity A (11) on its lower bottom surface. The magnet (51) is placed in the mounting cavity A (11) and is threaded through the lower shell (1) by a corresponding screw; the silicone rubber layer (52) is in contact with the mounting cavity A (11) to form a sealing structure, and the head of the corresponding screw is coated with sealant.

2. The waterproof structure for a vehicle-mounted terminal according to claim 1, characterized in that: The lower shell (1) has an inwardly recessed mounting cavity B (12) on its peripheral sidewall, and a display screen (3) is provided in the mounting cavity B (12). The back of the display screen (3) is in contact with the wall of the mounting cavity B (12); On the back of the display screen (3), from the center outwards are an inner ring adhesive area (31), an annular groove (32), a back adhesive area (33), and an outer ring adhesive area (34); the inner ring adhesive area (31) is coated with 3M strong waterproof adhesive, the back adhesive area (33) has back adhesive, and the outer ring adhesive area (34) is coated with high-density waterproof adhesive; when the display screen (3) and the wall of the mounting cavity B (12) are attached to each other, part of the 3M strong adhesive is squeezed into the annular groove (32) to form a waterproof rubber ring.

3. The waterproof structure for a vehicle-mounted terminal according to claim 1, characterized in that: The lower shell (1) has an inwardly recessed mounting cavity C (13) on its peripheral sidewall, and a USB connector (4) is installed in the mounting cavity C (13). The USB connector (4) is flat-headed, with a USB port end and an insertion section at its front and rear ends, respectively, and a stepped surface between them. After placing an annular ring on the stepped surface, the insertion section is inserted into the lower shell (1) and a connecting block (41) is fixed thereon. The connecting block (41) is fixedly connected to the lower shell (1) by a corresponding bolt rod.

4. The waterproof structure for a vehicle-mounted terminal according to claim 3, characterized in that: The USB connector (4) is also blocked at the mounting cavity C (13) by a waterproof block (42); The waterproof block (42) is a rubber block with elastic telescopic pins (421) at its upper and lower positions; the upper and lower walls of the mounting cavity C (13) have corresponding pin holes (131).

5. The waterproof structure for a vehicle-mounted terminal according to claim 1, characterized in that: The lower shell (1) and the upper cover (2) are fastened together by a gasket; The inner wall of the upper edge of the lower shell (1) is glued with an annular rubber (14); the edge of the annular rubber (14) is higher than the upper edge of the lower shell (1); the upper cover (2) has an annular groove (21) that is adapted to be inserted into the annular rubber (14).

6. The waterproof structure for a vehicle-mounted terminal according to claim 1, characterized in that: The lower shell (1) has a long threaded post (15) inside, and the lower shell (1) is threadedly engaged with the upper cover (2) through the long threaded post (15) and a corresponding screw.

7. The waterproof structure for a vehicle-mounted terminal according to claim 1, characterized in that: The lower shell (1) has an air hole at its center, which is plugged by a rubber plug.

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