A luggage case opening switch

Abstract

The utility model discloses a kind of suitcase opening switches, including suitcase button, the button seat and shell located below suitcase button, circuit board located below button seat, waterproof part is covered in the outer periphery of button seat, waterproof part is injection molded on shell, button seat, shell and waterproof part jointly form the sealed chamber containing circuit board, microswitch is provided below button seat, press suitcase button makes button seat abutting to microswitch.The utility model has the effect that sealing structure is more reliable, durability is higher, fundamentally solve the problem of internal circuit damage caused by external liquid intrusion.

Description

Technical Field

[0001] This utility model relates to the field of mechanical switch technology, and in particular to a suitcase opening switch. Background Technology

[0002] As an important functional component on the exterior of the car body, the trunk opening switch is usually integrated into the trunk lid or bumper. Users press this button to trigger the electric tailgate lock mechanism and open the trunk. Due to its special installation location, the switch is directly exposed to the external environment and is subjected to sun and rain, high-pressure water jets during car washes, and erosion from mud, de-icing agents, etc. during driving. The working environment is extremely harsh.

[0003] Currently, traditional car trunk opening switches mostly use mechanical or electronic micro-switch structures. Their waterproof sealing solutions mainly rely on adding a separate rubber sealing ring or gasket between the switch button and the mounting housing. This structure has several drawbacks. First, during assembly, the sealing ring may be misaligned, squeezed, or twisted, leading to poor assembly consistency and potential leakage. Second, over long-term use, the rubber sealing ring may lose elasticity due to aging, temperature changes, or permanent deformation from frequent pressing, resulting in decreased sealing performance or even failure. Third, high-pressure water from a water gun can easily seep into the switch through the assembly gap between the button and the housing. Utility Model Content

[0004] The purpose of this invention is to provide a luggage opening switch with a more reliable sealing structure and higher durability, fundamentally solving the problem of internal circuit damage caused by external liquid intrusion.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a luggage opening switch, including a luggage button, a button base and a housing located below the luggage button, and a circuit board located below the button base. The outer periphery of the button base is covered with a waterproof component, which is injection molded onto the housing. The button base, the housing, and the waterproof component together form a sealed chamber for accommodating the circuit board. A micro switch is provided below the button base. Pressing the luggage button causes the button base to press against the micro switch.

[0006] By adopting the above technical solution, the waterproof component is injection molded onto the housing, so that there are no gaps between the button base, the housing and the outer surface of the waterproof component, and the sealing structure is more reliable and more durable.

[0007] A further feature of this invention is that the waterproof component includes a flexible cover, which is formed by an overmolding process.

[0008] By adopting the above technical solution, it is ensured that when the luggage button is pressed, the button seat deforms under the pressure of the flexible cover, causing the button seat to press against the micro switch. This allows the circuit board to receive the on / off signal from the micro switch, and the intake and exhaust are achieved through elastic pressing in conjunction with the pressure balance membrane, thus regulating the pressure balance of the sealed chamber.

[0009] A further feature of this invention is that both the housing and the button base are provided with grooves corresponding to the position of the waterproof component, and the grooves extend along their inner sides and along the pressing and pulling direction.

[0010] A further feature of this invention is that the groove is an I-shaped embedding groove, and the waterproof component is integrally formed with the shell through the I-shaped embedding groove.

[0011] By adopting the above technical solution, the stability of the waterproof component in both the length and axial directions has been improved.

[0012] A further feature of this invention is that a base is provided below the housing, and a circuit board potting groove corresponding to the position of the circuit board is provided on the base. The circuit board potting groove is filled with potting resin, and the potting resin seals the bottom of the circuit board.

[0013] By adopting the above technical solution, the area of ​​the circuit board exposed in the sealed chamber is reduced, effectively protecting the circuit board and extending its service life.

[0014] A further feature of this invention is that the base is connected to the housing and forms the bottom wall of the sealed chamber. The housing is provided with a base potting groove that communicates with the circuit board potting groove. The joint between the base and the housing is located within the range defined by the outline of the base potting groove. The potting resin in the circuit board potting groove extends to the base potting groove.

[0015] By adopting the above technical solution and using potting resin to seal the bottom of the shell, the shell and base are sealed without gaps, thus improving the airtightness of the sealed chamber.

[0016] A further feature of this invention is that it also includes a wire harness assembly, which extends into the potting groove of the circuit board and is connected to the output end of the circuit board.

[0017] By adopting the above technical solution, it is ensured that there is no gap between the wiring harness assembly and the housing, thus improving the airtightness of the sealed chamber.

[0018] A further feature of this invention is that the button base extends downward along the sealed chamber and forms a support leg, the base extends upward along the sealed chamber and forms a limiting space to accommodate the support leg, and the support leg is spaced apart from the bottom wall of the limiting space.

[0019] By adopting the above technical solution, excessive pressure on the micro switch by the pressing base is avoided, which could damage the micro switch and extend its service life.

[0020] A further feature of this invention is that a through hole is provided on the bottom wall of the limiting space, and a pressure balancing membrane is provided at the opening end of the through hole away from the limiting space.

[0021] By adopting the above technical solution, the entry of liquid water and dust can be effectively blocked, and the pressure difference between the inside and outside can be balanced.

[0022] In summary, this utility model has the following beneficial effects: 1. The button base is wrapped with a waterproof component, which is injection molded onto the housing. The button base, housing, and waterproof component together form a sealed chamber to accommodate the circuit board, ensuring that there are no gaps between the outer surfaces of the button base, housing, and waterproof component. This fundamentally solves the problem of damage to the internal circuit caused by the intrusion of external liquids, and the sealing structure is more reliable and durable.

[0023] 2. The bottom of the housing is sealed with sealing resin in the circuit board potting tank and the base potting tank to ensure that there are no gaps between the housing and the base, thus improving the airtightness of the sealed chamber.

[0024] 3. A pressure balancing membrane is installed at the open end of the through hole away from the confined space. This allows air to pass freely while effectively blocking the entry of liquid water and dust. When the air pressure in the sealed chamber decreases, outside air enters the sealed chamber through the pressure balancing membrane. When the air pressure in the sealed chamber increases, the air in the sealed chamber is discharged to the outside through the pressure balancing membrane, thereby achieving the effect of balancing the pressure difference between the inside and outside. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention.

[0026] Figure 2 This is a schematic diagram of the present invention after omitting part of the wire harness assembly.

[0027] Figure 3 This is a cross-sectional view of the present invention.

[0028] Figure 4 This is a schematic diagram illustrating the potting resin and pressure balancing membrane of this utility model.

[0029] In the diagram: 1. Luggage button; 2. Button base; 22. Support leg; 3. Housing; 31. I-shaped recess; 32. Circuit board potting groove; 33. Potting resin; 34. Base potting groove; 4. Circuit board; 41. Micro switch; 5. Waterproof component; 51. Flexible cover; 6. Sealed chamber; 7. Base; 71. Connector; 72. Limiting space; 721. Through hole; 722. Pressure balancing diaphragm; 73. Through groove; 8. Wiring harness assembly. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] A suitcase opening switch, such as Figure 1-4 As shown, the device includes a luggage button 1, a button base 2 and a housing 3 located below the luggage button 1, and a circuit board 4 located below the button base 2. The button base 2 is covered with a waterproof component 5, which is injection molded onto the housing 3. The button base 2, the housing 3, and the waterproof component 5 together form a sealed chamber 6 that accommodates the circuit board 4. A microswitch 41 is located directly below the button base 2. Pressing the luggage button 1 causes the button base 2 to press against the microswitch 41. The sealed chamber 6 is formed by the waterproof component 5 covering the space between the housing 3 and the button base 2. By injection molding the waterproof component 5 onto the housing 3, no gaps are formed between the outer surfaces of the button base 2, the housing 3, and the waterproof component 5, resulting in a more reliable and durable sealing structure.

[0032] Preferably, the waterproof component 5 includes a flexible cover 51 made of rubber. The flexible cover 51 is sealed to the housing 3 and the button base 2 through a rubber-coating injection molding process. This ensures that when the luggage button 1 is pressed, the button base 2 deforms by squeezing the flexible cover 51, causing the button base 2 to press against the micro switch 41. This allows the circuit board 4 to receive the on / off signal from the micro switch 41. The rubber-coating injection molding process involves injecting molten rubber into a pre-reserved groove between the button base 2 and the housing 3, forming a strong molecular bond and mechanical interlock at the contact interface. This is the basic principle of rubber-coating injection molding, which will not be elaborated further here. In addition, by setting the flexible cover 51, when pressed, the elastic force of the flexible cover 51 better cooperates with the pressure balance membrane 722 to achieve air intake and exhaust, and regulate the pressure balance of the sealed chamber 6.

[0033] Preferably, both the housing 3 and the button base 2 are provided with grooves 31 corresponding to the position of the waterproof component 5, and the grooves 31 extend along their inner side and along the pressing and pulling direction.

[0034] Preferably, the groove 31 is an I-shaped embedding groove, and the waterproof component 5 is integrally formed with the shell 3 through the I-shaped embedding groove. By injecting molten rubber into the I-shaped embedding groove 31, the rubber is firmly locked in the I-shaped embedding groove 31 after cooling and solidification. The I-shaped embedding groove 31 is spaced apart along the length of the waterproof component 5, which improves the stability of the waterproof component 5 in the length direction and axial direction, and has the effect of withstanding pressing action and reliably preventing dislodgement.

[0035] Preferably, a base 7 is provided below the housing 3, and a circuit board potting groove 32 corresponding to the position of the circuit board 4 is provided on the base 7. The circuit board potting groove 32 is filled with potting resin 33, which seals the bottom of the circuit board 4. The potting resin 33 forms a protective layer after curing. It is a common material used for encapsulating and protecting electronic components or structures, and will not be described in detail here. By providing potting resin 33 in the circuit board potting groove 32, the bottom of the circuit board 4 is sealed, ensuring that the circuit board 4 is in a closed space, effectively protecting the circuit board 4 and extending its service life.

[0036] Preferably, the base 7 is interconnected with the housing 3 and forms the bottom wall of the sealed chamber 6. The housing 3 is provided with a base potting groove 34 that communicates with the circuit board potting groove 32. The joints between the base 7 and the housing 3 are all located within the area defined by the outline of the base potting groove 34. The potting resin 33 in the circuit board potting groove 32 extends to the base potting groove 34. By providing potting resin 33 within the base potting groove 34, the connection between the housing 3 and the base 7 is also sealed, ensuring no gaps between the housing 3 and the base 7, thus improving the airtightness of the sealed chamber 6. Preferably, the base 7 extends upward toward the circuit board 4 and forms a connecting portion 71. The circuit board 4 is located below the connecting portion 71 and is threadedly connected to the connecting portion 71. The circuit board 4 is fixed below the base 7. The base 7 is provided with a through slot 73 to accommodate the micro switch 41. Two connecting portions 71 are configured, with the through slot 73 located between the connecting portions 71. The circuit board 4 is exposed on the surface of the base 7 only through the through slot 73 and is electrically connected to the micro switch 41 through the through slot 73. This reduces the area of ​​the circuit board 4 exposed in the sealed chamber 6, effectively protecting the circuit board 4 and extending its service life.

[0037] Preferably, the circuit also includes a wire harness assembly 8, which extends into the circuit board potting groove 32 and is connected to the output end of the circuit board 4. First, the wire harness assembly 8 is connected to the output end of the circuit board 4, and then potting resin 33 is placed in the circuit board potting groove 32 to ensure that there is no gap between the wire harness assembly 8 and the housing 3, thus improving the airtightness of the sealed chamber 6.

[0038] Preferably, the button base 2 extends downward along the sealed chamber 6 to form a support leg 22, and the base 7 extends upward along the sealed chamber 6 to form a limiting space 72 to accommodate the support leg 22. The support leg 22 is spaced apart from the bottom wall of the limiting space 72. When the luggage button 1 is pressed, the support leg 22 of the button base 2 moves toward the bottom of the limiting space 72, and the button base 2 gradually presses against the micro switch 41. Because the support leg 22 is spaced apart from the bottom wall of the limiting space 72, when the support leg 22 reaches the bottom wall of the limiting space 72, it will provide feedback to the operator with a "resistance feeling", indicating that the operator has pressed it in place. This avoids the button base 2 from excessively squeezing the micro switch 41 and damaging the micro switch 41, thus improving the service life of the switch.

[0039] Preferably, a through hole 721 is provided on the bottom wall of the limiting space 72, and a pressure balancing membrane 722 is provided at the opening end of the through hole 721 away from the limiting space 72. The pressure balancing membrane 722 is a thin film made of polymer and is adhered to the end face of the through hole 721. The pressure balancing membrane 722 allows air to pass freely while effectively blocking the entry of liquid water and dust. When the air pressure in the sealed chamber 6 decreases, outside air enters the sealed chamber 6 through the pressure balancing membrane 722. When the air pressure in the sealed chamber 6 increases, the air in the sealed chamber 6 is discharged to the outside through the pressure balancing membrane 722, thereby achieving the effect of balancing the pressure difference between the inside and outside.

[0040] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A suitcase opening switch, comprising a suitcase button (1), a button base (2) located below the suitcase button (1), a housing (3), and a circuit board (4) located below the button base (2), characterized in that: The button base (2) is covered with a waterproof component (5) on its outer periphery. The waterproof component (5) is injection molded onto the housing (3). The button base (2), the housing (3), and the waterproof component (5) together form a sealed chamber (6) for accommodating the circuit board (4). A micro switch (41) is provided below the button base (2). Pressing the luggage button (1) causes the button base (2) to press against the micro switch (41).

2. A suitcase opening switch according to claim 1, characterized in that: The waterproof component (5) includes a flexible cover (51), which is formed by an overmolding process.

3. A suitcase opening switch according to claim 2, characterized in that: Both the housing (3) and the button base (2) are provided with grooves (31) corresponding to the position of the waterproof component (5), and the grooves (31) extend along their inner side and along the pressing and pulling direction.

4. A suitcase opening switch according to claim 3, characterized in that: The groove (31) is an I-shaped embedding groove, and the waterproof component (5) is integrally formed with the shell (3) through the I-shaped embedding groove.

5. A suitcase opening switch according to claim 1, characterized in that: A base (7) is provided below the housing (3). A circuit board potting groove (32) corresponding to the position of the circuit board (4) is provided on the base (7). A potting resin (33) is provided in the circuit board potting groove (32), and the potting resin (33) seals the bottom of the circuit board (4).

6. A suitcase opening switch according to claim 5, characterized in that: The base (7) is connected to the housing (3) and forms the bottom wall of the sealed chamber (6). The housing (3) is provided with a base potting groove (34) that communicates with the circuit board potting groove (32). The joint between the base (7) and the housing (3) is located within the range defined by the outline of the base potting groove (34). The potting resin (33) in the circuit board potting groove (32) extends to the base potting groove (34).

7. A suitcase opening switch according to claim 5, characterized in that: It also includes a wire harness assembly (8) that extends into the potting groove (32) of the circuit board and is connected to the output end of the circuit board (4).

8. A suitcase opening switch according to claim 6, characterized in that: The button base (2) extends downward along the sealed chamber (6) and forms a support leg (22). The base (7) extends upward along the sealed chamber (6) and forms a limiting space (72) to accommodate the support leg (22). The support leg (22) and the bottom wall of the limiting space (72) are spaced apart.

9. A suitcase opening switch according to claim 8, characterized in that: A through hole (721) is provided on the bottom wall of the limiting space (72), and a pressure balancing membrane (722) is provided at the opening end of the through hole (721) away from the limiting space (72).

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