A normally open push button switch

Abstract

The utility model discloses a normally open button switch relates to button switch technical field, including bottom shell, static contact, button, waterproof cover, platen, dynamic contact subassembly and press feedback subassembly, press feedback subassembly contains trigger spring, reset elastic part, metal spring and base, reset elastic part is located in button spring hole and both ends are connected spring hole top wall and base respectively, and the bottom of bottom shell inner chamber is equipped with base cavity, and the bottom wall of base cavity is equipped with spring cavity, and the base is installed in the base cavity and is opened spring through -hole, and the metal spring is located below the base, and the one end of trigger spring is connected spring hole top wall, and the other end is connected metal spring through spring through -hole. The switch realizes sound feedback through press feedback subassembly, improves operation confirmation feeling, and trigger spring can be adapted to different press stroke, guarantees on -off reliability, and is applicable to multiple scenes.

Description

Technical Field

[0001] This utility model relates to the field of push button switch technology, specifically to a normally open push button switch. Background Technology

[0002] Normally open push-button switches are a fundamental control component widely used in electronic devices, home appliances, and industrial control. Their core function is to open or close a circuit through a pressing operation, and to keep the circuit open (normally open) when no external force is applied. With the expansion of application scenarios, the market has placed higher demands on the performance of normally open push-button switches, especially in terms of waterproofing, pressing feedback experience, and flexible travel adaptation, where existing technologies still have significant shortcomings.

[0003] Currently, conventional normally open push-button switches typically consist of a base, a stationary contact, a movable button, a waterproof cover, and a moving contact assembly. The waterproof cover primarily isolates the internal circuitry from external moisture, dust, and other impurities, preventing malfunction due to moisture or contamination and meeting basic protection requirements. A typical example is the waterproof normally open push-button switch disclosed in our previous application, application number CN2020228548821. However, in practical use, users increasingly demand a stronger sense of confirmation when operating the button. Existing switches largely rely on physical contact through mechanical structures to achieve on / off switching, lacking a clear pressure feedback mechanism (such as audible feedback). This makes it difficult for users to intuitively determine whether the operation has taken effect, especially in low-light or blind operation scenarios, resulting in a poor user experience.

[0004] In addition, some switches that attempt to add a press feedback function often use a method of rigidly connecting the feedback element (such as a metal spring) directly to the button or moving contact component. The feedback force is tied to the pressing stroke and is difficult to adjust independently.

[0005] Therefore, how to achieve clear pressing feedback and improve the adaptability of pressing stroke while ensuring the waterproofness and on / off reliability of normally open push button switches has become an urgent technical problem to be solved in the design and production of this type of switch. Utility Model Content

[0006] To address the shortcomings of the prior art, this utility model provides a normally open push-button switch.

[0007] The technical solution adopted by this utility model is: a normally open push button switch, including a bottom shell, a static contact piece connected to the bottom shell, a button movably connected to the bottom shell, a waterproof cover sleeved on the button, a pressure plate set on the waterproof cover and connected to the bottom shell, and a moving contact component set at the bottom of the button, and also includes a press feedback component, wherein the press feedback component includes a trigger spring, a reset elastic element, a metal spring and a base. The reset elastic element is disposed in the spring hole of the button, with one end connected to the top wall of the spring hole and the other end connected to the base; The bottom of the inner cavity of the bottom shell is provided with a base cavity, and the bottom wall of the base cavity is provided with a spring clip cavity; The base is installed inside the base cavity, and the base is provided with a through hole for the spring. The metal spring is located below the base; One end of the trigger spring is connected to the top wall of the spring hole, and the other end passes through the spring through hole and abuts against the metal spring sheet.

[0008] Furthermore, a spring post is provided inside the spring hole, the base includes a rod and a connecting step, the rod is telescopically engaged with the spring hole, the surface of the connecting step is provided with an annular groove, one end of the reset elastic element is fitted onto the spring post and connected to the top wall of the spring hole, the other end is fitted onto the rod and connected to the annular groove, and one end of the trigger spring abuts against the top of the spring post.

[0009] Furthermore, the base cavity has a square structure with chamfered corners at its four corners, and the shape of the base is adapted to the base.

[0010] Furthermore, guide bosses are provided on both sides of the button, and guide grooves that are adapted to the guide bosses are provided on the inner wall of the inner cavity of the bottom shell.

[0011] Furthermore, the reset elastic element is a helical spring.

[0012] The beneficial effects of this utility model are: 1. Provides press feedback to enhance user experience: This application uses a press feedback component. When the button is pressed, the trigger spring can push the metal spring to deform and make a sound, providing users with clear operation feedback. This effectively solves the problem that existing switches lack feedback, making it difficult for users to judge whether the operation is effective. It is especially suitable for low-light or blind operation scenarios, significantly improving ease of use and operation confirmation.

[0013] 2. Improve the flexibility of pressing stroke adaptation and enhance versatility: The cooperative structure of the trigger spring, button, and metal spring in the pressing feedback component allows the pressing stroke to be flexibly adapted by adjusting the trigger spring parameters or the base mounting position. This eliminates the need to design molds separately for different application scenarios (such as panels of different thicknesses or devices requiring different operating forces), reduces manufacturing costs, and improves the product's adaptability and versatility to diverse usage scenarios.

[0014] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is an exploded view of the present invention.

[0018] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0019] Figure 4 This is a schematic diagram of the bottom shell structure.

[0020] Figure 5 This is a schematic diagram of the action.

[0021] Figure 1-5 In the middle section: 1. Bottom shell; 2. Static contact piece; 3. Button; 4. Waterproof cover; 5. Pressure plate; 6. Moving contact assembly; 7. Trigger spring; 8. Reset elastic element; 9. Metal spring; 10. Base; 11. Base cavity; 12. Spring cavity; 13. Spring through hole; 14. Spring post; 15. Rod; 16. Connecting step; 17. Annular groove; 18. Chamfer; 19. Guide boss; 20. Guide groove; 21. Spring hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0024] This utility model provides a normally open push button switch.

[0025] In this embodiment, refer to Figure 1-5The normally open push button switch includes a base shell 1, a stationary contact piece 2 connected to the base shell 1, a button 3 movably connected inside the base shell, a waterproof cover 4 sleeved on the button, a pressure plate 5 disposed on the waterproof cover 4 and connected to the base shell, and a moving contact assembly 6 disposed at the bottom of the button. It also includes a press feedback assembly, which includes a trigger spring 7, a reset elastic element 8, a metal spring 9, and a base 10. The reset elastic element is disposed in the spring hole 21 of the button, with one end connected to the top wall of the spring hole and the other end connected to the base; The bottom of the inner cavity of the bottom shell is provided with a base cavity 11, and the bottom wall of the base cavity 11 is provided with a spring clip cavity 12; The base is installed inside the base cavity, and the base is provided with a spring through hole 13; The metal spring is located below the base; One end of the trigger spring is connected to the top wall of the spring hole, and the other end passes through the spring through hole and abuts against the metal spring sheet.

[0026] In the above technical solution, a press feedback component is added to the conventional normally open push button switch structure. The reset elastic element is placed in the button spring hole, and its two ends are connected to the top wall of the spring hole and the base, respectively. After the button is pressed, it can be automatically reset by means of the reset elastic element. The base is installed in the base cavity of the bottom shell, and the metal spring is located in the spring cavity below the base. One end of the trigger spring is connected to the top wall of the spring hole, and the other end passes through the spring through hole of the base and abuts against the metal spring. When the button is pressed, the trigger spring moves down with the button and pushes the metal spring to deform. After the button is released, the reset elastic element drives the button and the trigger spring to reset, and the metal spring returns to its original shape.

[0027] This solves the problems of existing switches lacking clear pressing feedback and having poor travel adaptability. The deformation of the metal spring generates sound feedback, allowing users to intuitively judge whether the operation is effective. The adjustable characteristics of the trigger spring enable the pressing travel to adapt to different scenarios. At the same time, through the structural design of the base cavity and spring cavity, the feedback component is compatible with the original waterproof and contact structure, ensuring the switch's waterproofness and reliability.

[0028] Specifically, a spring post 14 is provided in the spring hole, the base includes a rod 15 and a connecting step 16, the rod 15 is telescopically engaged with the spring hole, the surface of the connecting step is provided with an annular groove 17, one end of the reset elastic element is fitted on the spring post and connected to the top wall of the spring hole, the other end is fitted on the rod and connected to the annular groove, and one end of the trigger spring abuts against the top of the spring post.

[0029] In this embodiment, a spring post is installed inside the spring hole, and the base is designed as a rod and a connecting step structure. The rod and the spring hole form a telescopic fit, limiting the button pressing direction. The two ends of the reset elastic element are respectively fitted onto the spring post and the base rod, with one end connected to the annular groove of the connecting step. One end of the trigger spring abuts against the top of the spring post. Through the guidance of the spring post and the rod, and the limiting effect of the annular groove, the stable operation of the reset elastic element and the trigger spring is ensured. This improves the assembly stability and motion accuracy of the components. The fit between the spring post and the rod prevents the button from shifting when pressed, and the annular groove prevents misalignment of the reset elastic element, reducing component wear. Simultaneously, it makes the force on the trigger spring more uniform, enhances the consistency of the metal spring feedback, extends the switch's service life, and further optimizes the pressing feel and feedback effect.

[0030] Specifically, the base cavity has a square structure with chamfered corners of 18 at its four corners, and the shape of the base is adapted to the base.

[0031] In this embodiment, the base can be a square structure, or other similar structures such as triangles, rectangles, or polygons. This prevents the base from rotating or shifting during switch operation; the chamfered design simplifies the assembly process, improves production efficiency, and reduces product defect rates caused by assembly deviations.

[0032] Specifically, guide protrusions 19 are provided on both sides of the button, and guide grooves 20 that are adapted to the guide protrusions are provided on the inner wall of the inner cavity of the bottom shell.

[0033] In this embodiment, guide bosses are provided on both sides of the button, and guide grooves are provided on the inner wall of the bottom shell cavity. The bosses and grooves form a sliding fit. When the button is pressed, the guide bosses move along the guide grooves, limiting the movement trajectory of the button.

[0034] Specifically, the reset elastic element is a helical spring.

[0035] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A normally open push-button switch, comprising a base housing, a stationary contact piece connected to the base housing, a button movably connected to the base housing, a waterproof cover sleeved on the button, a pressure plate disposed on the waterproof cover and connected to the base housing, and a moving contact assembly disposed at the bottom of the button, characterized in that: It also includes a pressure feedback component, which includes a trigger spring, a reset elastic element, a metal spring, and a base; The reset elastic element is disposed in the spring hole of the button, with one end connected to the top wall of the spring hole and the other end connected to the base; The bottom of the inner cavity of the bottom shell is provided with a base cavity, and the bottom wall of the base cavity is provided with a spring clip cavity; The base is installed inside the base cavity, and the base is provided with a through hole for the spring. The metal spring is located below the base; One end of the trigger spring is connected to the top wall of the spring hole, and the other end passes through the spring through hole and abuts against the metal spring sheet.

2. The normally open push-button switch according to claim 1, characterized in that: A spring post is provided inside the spring hole. The base includes a rod and a connecting step. The rod is telescopically engaged with the spring hole. An annular groove is provided on the surface of the connecting step. One end of the reset elastic element is fitted onto the spring post and connected to the top wall of the spring hole. The other end is fitted onto the rod and connected to the annular groove. One end of the trigger spring abuts against the top of the spring post.

3. The normally open push-button switch according to claim 2, characterized in that: The base cavity has a square structure with chamfered corners at its four corners, and the shape of the base is adapted to the base.

4. The normally open push-button switch according to claim 1, characterized in that: The button has guide bosses on both sides, and the inner wall of the bottom shell has guide grooves that match the guide bosses.

5. The normally open push-button switch according to claim 1, characterized in that: The reset elastic element is a helical spring.

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