Mounting structure for capacitive touch sensor
By introducing a protective shell, sealing plate, and drying components into the mounting structure of the capacitive touch sensor, the problems of misjudged touch signals and water vapor infiltration in high humidity environments are solved, and the sensor can operate stably in humid environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN OWEIS TECH CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-05-19
AI Technical Summary
Capacitive touch sensors are prone to misinterpreting touch signals in high humidity environments, and moisture infiltration can affect internal circuitry.
An installation structure was designed, including a protective shell, a sealing plate, a protective film, and a drying component. The protective shell has through grooves and through holes, the protective film is closed by an elastic ring, and the drying component is filled with desiccant to prevent moisture from entering and keep the touch area dry.
It effectively reduces the misinterpretation of touch signals due to humidity, extends the sensor lifespan, and improves reliability and stability in high humidity environments.
Smart Images
Figure CN224263615U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of touch sensors, and in particular to an installation structure for a capacitive touch sensor. Background Technology
[0002] Capacitive touch technology is widely used in touch sensing devices. A capacitive touch sensor is a device that recognizes touch by detecting changes in capacitance. It is used in touch screens, electronic device buttons, and other scenarios, such as some water purifiers, kitchen appliances, vending machines, and switches. It has the characteristics of fast response.
[0003] Capacitive touch sensors recognize touch operations based on the principle of capacitive sensing. When a finger touches the screen, the human body, acting as a conductor, forms a capacitance with the conductive layer, altering the original electric field distribution. By detecting these changes, the touch signal is converted into an operation command that the device can recognize.
[0004] Capacitive touch sensors are also used in high-humidity, moisture-prone environments, such as bathroom fixtures, outdoor industrial control panels, and marine instruments. When used in high-humidity environments, capacitive touch sensors are installed inside the housing, leaving the touch area exposed to moisture. In high-humidity environments, moisture can condense into tiny droplets on the sensor's touch surface. Water is a good conductor, and when water droplets fall on the touch surface, they can create a capacitance effect similar to that of a finger touch. This capacitance change, similar to that produced by a finger touch, can easily lead to misinterpreted touch signals. Furthermore, in humid environments, moisture can seep into the mounting structure, affecting the normal operation of internal circuitry and exacerbating touch anomalies. Utility Model Content
[0005] This invention provides a mounting structure for a capacitive touch sensor, which can solve the problem that capacitive touch sensors are prone to misinterpreting touch signals when used in high humidity environments, as is present in existing capacitive touch sensor mounting structures.
[0006] A mounting structure for a capacitive touch sensor includes a mounting housing and a capacitive touch sensor mounted on the mounting housing. A through groove is provided on one side of the mounting housing near the touch area of the capacitive touch sensor. A protective shell is fixed on the outside of the mounting housing and is coaxially arranged with the through groove. A drying component is provided on the protective shell. A sealing plate is fixed on the inner wall of the protective shell, and a first through hole is provided in the middle of the sealing plate.
[0007] A flexible protective membrane is fixed inside the first through hole, and a second through hole is opened in the middle of the protective membrane. An elastic ring that cooperates with the second through hole is connected to the protective membrane, and the second through hole is closed by the elastic ring.
[0008] Preferably, the drying assembly includes a connecting pipe fixed inside the protective housing, a connecting cap detachably mounted on the connecting pipe, and a desiccant filled inside the connecting cap.
[0009] Preferably, the touch area of the capacitive touch sensor is provided with a film, and the surface of the film is provided with a hydrophobic coating.
[0010] Preferably, a plurality of studs are fixed on the inner wall of the mounting housing, the studs are threaded inside, and a plurality of screws are inserted through the capacitive touch sensor, the screws being threadedly connected to the studs.
[0011] Preferably, the protective shell, sealing plate, and protective film are all transparent structures.
[0012] Preferably, a sealing ring that mates with the through groove is fixed on the side of the mounting housing near the capacitive touch sensor, and the sealing ring is located between the capacitive touch sensor and the mounting housing.
[0013] Preferably, the connecting pipe is fixed to the bottom side of the protective shell, and the connecting cover is a transparent structure.
[0014] Preferably, the drying assembly further includes a raised ring fixed to the inner wall of the connecting cover, a support plate disposed on the top of the raised ring, and a humidity indicator card disposed inside the connecting cover and below the support plate, wherein the support plate has a hollow structure.
[0015] Preferably, the sealing plate is configured as a conical structure, and the surface of the protective film is provided with a hydrophobic coating.
[0016] Preferably, both the stud and the screw are made of non-metallic materials.
[0017] This utility model provides a mounting structure for a capacitive touch sensor, which has the following advantages:
[0018] 1. By installing a protective shell and sealing plate on the touch area of the capacitive touch sensor, the contact between external moisture and the touch area can be reduced. Simultaneously, the protective film seals the first through-hole, further reducing the ingress of moisture into the protective shell. Furthermore, the second through-hole normally closes through the contraction of an elastic ring, forming a dustproof and waterproof barrier. This reduces malfunctions of the capacitive touch sensor in high-humidity environments, extends the sensor's lifespan, and makes it better suited for moisture-prone scenarios, thus improving the reliability of the capacitive touch sensor.
[0019] 2. A drying component is installed inside the protective housing. The desiccant filled inside the connecting cover is used to dry the inside of the protective housing, which helps to keep the touch area dry and ensures the stable operation of the capacitive touch sensor. Attached Figure Description
[0020] Figure 1 A schematic diagram of the mounting structure for a capacitive touch sensor provided by this utility model. Figure 1 ;
[0021] Figure 2 A schematic diagram of the mounting structure for a capacitive touch sensor provided by this utility model. Figure 2 ;
[0022] Figure 3 A schematic diagram of the through groove and film structure for a capacitive touch sensor mounting structure provided by this utility model;
[0023] Figure 4 A schematic diagram of the internal structure of the protective shell for a capacitive touch sensor mounting structure provided by this utility model;
[0024] Figure 5 A schematic diagram of the drying assembly structure for a capacitive touch sensor mounting structure provided by this utility model;
[0025] Figure 6 A schematic diagram of the sealing ring and stud structure for a capacitive touch sensor mounting structure provided by this utility model.
[0026] Explanation of reference numerals in the attached figures:
[0027] 1. Mounting housing; 2. Capacitive touch sensor; 3. Through slot; 4. Protective shell; 5. Sealing plate; 6. First through hole; 7. Protective film; 8. Second through hole; 9. Elastic ring; 10. Sealing ring; 11. Connecting tube; 12. Connecting cover; 13. Raised ring; 14. Support plate; 15. Humidity indicator card; 16. Stud; 17. Screw; 18. Film. Detailed Implementation
[0028] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.
[0029] like Figures 1 to 6As shown in the figure, the present invention provides a mounting structure for a capacitive touch sensor, including a mounting housing 1 and a capacitive touch sensor 2 mounted on the mounting housing 1. A through groove 3 is provided on the side of the mounting housing 1 near the touch area of the capacitive touch sensor 2 to facilitate the user's finger touching the touch area. A protective shell 4 is fixed on the outside of the mounting housing 1 and is coaxially arranged with the through groove 3. A sealing plate 5 is fixed on the inner wall of the protective shell 4. A first through hole 6 is opened in the middle of the sealing plate 5. A flexible protective film 7 is fixed inside the first through hole 6. A second through hole 8 is opened in the middle of the protective film 7. An elastic ring 9 is connected to the protective film 7 and is arranged to cooperate with the second through hole 8. The elastic ring 9 is preferably made of rubber band, elastic band, etc., and has good elasticity. The second through hole 8 is closed by the elastic ring 9.
[0030] The capacitive touch sensor 2 is installed inside the mounting housing 1, with only the touch area exposed. A protective shell 4 and a sealing plate 5 are installed at the touch area to protect it, reducing contact between external moisture and the touch area. A first through-hole 6 is pre-drilled in the center of the sealing plate 5 to facilitate user finger contact with the touch area, and a protective film 7 (such as a waterproof cloth) seals the first through-hole 6, further reducing moisture ingress into the protective shell 4. Simultaneously, the second through-hole 8 of the protective film 7 is normally closed by the contraction of an elastic ring 9, forming a dustproof and waterproof barrier to better protect the internal capacitive touch sensor 2. Furthermore, the elastic ring 9 automatically expands when the user's finger is inserted into the second through-hole 8, allowing the user to operate the touch area through the second through-hole 8.
[0031] In some specific implementation plans, such as Figure 1 , Figure 4 and Figure 5 As shown, the protective housing 4 is equipped with a drying assembly, which includes a connecting pipe 11 fixed inside the protective housing 4, a connecting cover 12 detachably mounted on the connecting pipe 11, desiccant filled inside the connecting cover 12, a raised ring 13 fixed on the inner wall of the connecting cover 12, a support plate 14 located on top of the raised ring 13, and a humidity indicator card 15 located inside the connecting cover 12 and below the support plate 14. The connecting pipe 11 is fixed to the side wall of the protective housing 4 and communicates with the interior of the protective housing 4. The connecting cover 12 is transparent, making it easy to observe the color change of the humidity indicator card 15. The support plate 14 is hollow, making it easy for the humidity indicator card 15 to detect the moisture inside the desiccant. The connecting cover 12 and the connecting pipe 11 are connected by a thread, making disassembly and assembly simple. The support plate 14 is placed above the raised ring 13, facilitating the replacement of the desiccant and the humidity indicator card 15 inside the connecting cover 12.
[0032] A drying component is installed inside the protected area of the protective shell 4. The desiccant (such as silica gel desiccant) filled inside the connecting cover 12 is used to dry the inside of the protective shell 4, which helps to keep the touch area dry. A humidity indicator card 15 is also provided to visually display the humidity. Users can quickly judge the effectiveness of the desiccant by the color on the card and replace the desiccant as needed.
[0033] In some specific implementation plans, such as Figure 3 As shown, the touch area of the capacitive touch sensor 2 is provided with a film 18. A qualified waterproof film is selected and applied to the touch area to ensure its protection and compatibility. The surfaces of the film 18 and the protective film 7 are provided with a hydrophobic coating, and the sealing plate 5 is designed with a conical structure to guide liquid to slide off.
[0034] A hydrophobic coating is applied to the outward-facing surfaces of the film 18 and the protective film 7 to reduce moisture accumulation on the touch area and the surface of the protective film 7, thereby reducing the impact of humidity on touch accuracy. The hydrophobic coating on the film 18 serves a waterproof function, while the hydrophobic coating on the protective film 7 prevents water droplets from adhering to the protective film 7 when the operator inserts their fingers into the film.
[0035] In some specific implementation plans, such as Figure 2 and Figure 6 As shown, multiple studs 16 are fixed to the inner wall of the mounting housing 1. Each stud 16 has a hollow interior and internal threads. One end of each stud 16 has a screw that connects to the internal threads of the mounting housing 1, and the exterior has a hexagonal nut for easy tool-based fixing. Multiple screws 17 penetrate the capacitive touch sensor 2, and these screws 17 are threaded into the studs 16. Both the studs 16 and screws 17 are made of non-metallic materials, preferably nylon.
[0036] The stud 16 is fastened to the mounting housing 1. The capacitive touch sensor 2 can be installed by the engagement of the screw 17 with the stud 16, making installation and removal simple and the connection stable. Furthermore, the stud 16 and screw 17 around the touch area are non-metallic to avoid electromagnetic interference from metallic objects from interfering with the capacitive touch button.
[0037] In some specific implementation plans, such as Figure 6 As shown, a sealing ring 10 is fixed on the inner wall of the mounting housing 1 and on one side of the through groove 3. The sealing ring 10 is located between the capacitive touch sensor 2 and the mounting housing 1. The sealing ring 10 seals the connection between the capacitive touch sensor 2 and the mounting housing 1, ensuring the protection of the inside of the mounting housing 1 and the capacitive touch sensor 2, and preventing moisture from seeping into the interior and affecting the normal operation of the capacitive touch sensor 2.
[0038] In some specific implementations, the protective shell 4, the sealing plate 5, and the protective film 7 are all transparent structures, making it easy to observe the touch area located inside the protective shell 4 for direct operation.
[0039] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios:
[0040] The capacitive touch sensor 2 is installed inside the mounting housing 1, with only the touch area exposed under normal conditions. A protective shell 4 and a sealing plate 5 are installed at the touch area to protect it, reducing contact between external moisture and the touch area. A first through-hole 6 is pre-drilled in the center of the sealing plate 5 to facilitate user finger contact with the touch area, and a protective film 7 seals the first through-hole 6, further reducing moisture ingress into the protective shell 4. Simultaneously, the second through-hole 8 of the protective film 7 is normally closed by the contraction of an elastic ring 9, forming a dustproof and waterproof barrier to better protect the internal capacitive touch sensor 2. Furthermore, the elastic ring 9 automatically expands when the user's finger is inserted into the second through-hole 8, allowing the user to operate the touch area through the second through-hole 8.
[0041] Meanwhile, a drying component is installed inside the protective area of the protective shell 4. The desiccant filled inside the connecting cover 12 is used to dry the inside of the protective shell 4, which helps to keep the touch area dry and is more suitable for moisture-prone scenarios such as bathroom equipment, outdoor industrial control panels, and marine instruments, thereby improving the stability of the capacitive touch sensor 2 in humid environments.
[0042] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.
Claims
1. A mounting structure for a capacitive touch sensor comprising a mounting case (1) and a capacitive touch sensor (2) mounted on the mounting case (1), characterized in that, The mounting housing (1) has a through groove (3) on the side near the touch area of the capacitive touch sensor (2). A protective shell (4) is fixed on the outside of the mounting housing (1) and is coaxially arranged with the through groove (3). A drying component is provided on the protective shell (4). A sealing plate (5) is fixed on the inner wall of the protective shell (4). A first through hole (6) is opened in the middle of the sealing plate (5). A flexible protective membrane (7) is fixed inside the first through hole (6). A second through hole (8) is opened in the middle of the protective membrane (7). An elastic ring (9) that cooperates with the second through hole (8) is connected to the protective membrane (7). The second through hole (8) is closed by the elastic ring (9).
2. The mounting structure for a capacitive touch sensor according to claim 1, wherein The drying assembly includes a connecting pipe (11) fixed inside the protective shell (4), a connecting cap (12) detachably installed on the connecting pipe (11), and a desiccant filled inside the connecting cap (12).
3. The mounting structure for a capacitive touch sensor according to claim 2, wherein The touch area of the capacitive touch sensor (2) is provided with a film (18), and the surface of the film (18) is provided with a hydrophobic coating.
4. The mounting structure for a capacitive touch sensor according to claim 3, wherein Multiple studs (16) are fixed on the inner wall of the mounting housing (1). The studs (16) have internal threads. The capacitive touch sensor (2) is provided with multiple screws (17). The screws (17) are threadedly connected to the studs (16).
5. The mounting structure for a capacitive touch sensor according to claim 1, wherein The protective shell (4), sealing plate (5) and protective film (7) are all transparent.
6. A mounting structure for a capacitive touch sensor according to claim 5, wherein The mounting housing (1) is fixed with a sealing ring (10) that mates with the through groove (3) on the side near the capacitive touch sensor (2). The sealing ring (10) is located between the capacitive touch sensor (2) and the mounting housing (1).
7. The mounting structure for a capacitive touch sensor according to claim 2, wherein The connecting pipe (11) is fixed to the bottom side of the protective shell (4), and the connecting cover (12) is a transparent structure.
8. The mounting structure for a capacitive touch sensor according to claim 6, wherein The drying assembly also includes a raised ring (13) fixed on the inner wall of the connecting cover (12), a support plate (14) on the top of the raised ring (13), and a humidity indicator card (15) located inside the connecting cover (12) and below the support plate (14). The support plate (14) has a hollow structure.
9. The mounting structure for a capacitive touch sensor according to claim 1, wherein The sealing plate (5) is designed with a conical structure, and the surface of the protective film (7) is provided with a hydrophobic coating.
10. The mounting structure for a capacitive touch sensor according to claim 4, wherein Both the stud (16) and the screw (17) are made of non-metallic materials.