A push button switch

Abstract

This utility model discloses a push button switch, including a housing, a button assembly, an upper housing, a base, functional feet, and pins, with the functional feet and pins mounted on the base. The button assembly includes a button base, a button piece, a moving contact piece, a spring, and a waterproof ring. A push rod extends from the bottom of the button base, with connecting steps on both sides of the bottom outer wall of the push rod. The upper end of the waterproof ring is sealed to the bottom of the button base, and the lower end is pressed between the sealing steps of the upper housing and the housing. The upper housing has a through hole in the center for the push rod to extend into, with connecting grooves on both sides of the bottom of the through hole that mate with the connecting steps. This push button switch simplifies the assembly process and reduces the requirements for machining precision through the direct snap-fit ​​between the connecting steps and the connecting grooves; the double-sealing structure of the waterproof ring improves waterproof performance; the fit between the push rod and the through hole ensures axial movement of the moving contact piece, improving electrical reliability, and balancing ease of assembly, waterproof reliability, and low-cost manufacturing.

Description

Technical Field

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

[0002] Pushbutton switches are widely used electrical control components in electronic devices, and their performance directly affects the reliability and service life of the equipment. Currently, traditional pushbutton switches typically consist of components such as a housing, pushbutton assembly, upper shell, base, functional feet, and pins. Among these, the fixing and sealing structure of the pushbutton assembly is a key factor affecting the switch's assembly efficiency, waterproof performance, and electrical stability.

[0003] In existing technologies, the assembly process of push-button switches generally adopts the following approach: the push rod of the push-button base needs to be axially positioned through a complex stepped structure of the housing, while multiple snap-fit ​​or threaded connectors are used to fix the push-button base to the upper housing. This structure has the following drawbacks:

[0004] 1. Complex assembly process: The button base needs to be aligned with the stepped structure of the outer shell first, and then fixed with additional fasteners (such as clips and screws), which makes the assembly steps cumbersome and difficult to automate.

[0005] 2. High machining accuracy requirements: The outer shell needs to be machined with multiple steps and snap-fit ​​structures, the mold design is complex, and the tolerance control is strict, which increases the manufacturing cost.

[0006] 3. Insufficient waterproof performance: In traditional designs, waterproof rings are usually only used as independent seals between the outer shell and the upper shell. After long-term pressure, they are prone to water leakage due to material fatigue or assembly gaps, especially in outdoor or humid environments where reliability is poor.

[0007] 4. Structural redundancy: In order to be compatible with fixed and moving parts, the housing needs to reserve multiple functional areas (such as card slots and guide slots), which increases the size of the switch and makes it difficult to meet the needs of miniaturized devices.

[0008] Therefore, how to balance ease of assembly, waterproof reliability, and low-cost manufacturing has become a technical bottleneck that urgently needs to be overcome in the field of push button switches. Utility Model Content

[0009] To address the shortcomings of the prior art, this utility model provides a push-button switch.

[0010] The technical solution adopted by this utility model is: a push button switch, including a housing, a button assembly, an upper housing, a base, functional feet and pins, wherein the functional feet and pins are disposed on the base, the button assembly includes a button base, a button piece, a moving contact piece, a spring and a waterproof ring, a push rod extends from the bottom of the button base, and connecting steps are provided on the outer walls on both sides of the bottom of the push rod, the upper end of the waterproof ring is sealed to the bottom of the button base, and the lower end is pressed between the sealing steps of the upper housing and the housing;

[0011] The upper shell has a through hole in the center for the push rod to extend into, and there are connecting slots on both sides of the bottom of the through hole that are connected to the connecting steps.

[0012] Furthermore, the push rod is provided with a spring cavity, and slots are provided on both sides of the spring cavity. A support step is provided on the inner side of the bottom of the slot. The moving contact piece is installed in the slot and connected to the support step. The spring is installed in the spring cavity, with one end connected to the top wall of the spring cavity and the other end connected to the moving contact piece.

[0013] Furthermore, the upper shell has alignment openings on both sides, and the base has alignment protrusions that engage with the alignment openings.

[0014] Furthermore, the movable contact includes a connecting portion whose width is adapted to the slot width and a widening portion provided at both ends of the connecting portion, wherein the widening portion has widening bosses on both sides.

[0015] Furthermore, a moving contact is provided on the widened portion.

[0016] Furthermore, the middle part of the connecting portion is provided with a protruding ball for connecting with one end of the spring.

[0017] The beneficial effects of this utility model are:

[0018] 1. Significantly Simplified Assembly Process: The button base is directly engaged and fixed to the connecting slots within the through-hole of the upper housing via the connecting steps on both sides of the push rod, forming a pre-assembled "button base-upper housing" module. This eliminates the need for complex steps or additional fasteners on the outer housing. Subsequent assembly only requires the sequential insertion of the spring and moving contact, followed by fitting the base, significantly reducing assembly steps, adapting to automated production lines, and improving production efficiency. Furthermore, the housing does not require the machining of multiple steps, reducing the precision requirements and simplifying the entire switch assembly process.

[0019] 2. Improved waterproof performance: The waterproof ring adopts a double sealing structure of "sealing the button seat at the top and pressing the bottom between the upper shell and the outer shell". The upper end of the waterproof ring is interference-fitted with the bottom of the button seat to prevent water vapor from seeping in from the top of the button. The lower end is compressed by the riveting pressure of the outer shell onto the sealing step of the upper shell, which effectively improves the sealing and waterproof effect of the switch.

[0020] 3. Improved electrical reliability: The connection between the button base and the upper shell eliminates the poor contact problem caused by button wobbling in traditional solutions. The moving contact always moves along the axis of the push rod during the pressing process, avoiding wobbling and effectively improving electrical reliability.

[0021] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0025] Figure 3 This is a schematic diagram of the interior after the outer shell has been removed.

[0026] Figure 4 This is a schematic diagram of the explosion with the outer shell removed.

[0027] Figure 5 This is a schematic diagram showing the connection between the button base and the upper shell.

[0028] Figure 6 This is a schematic diagram showing the connection between the button base and the moving contact.

[0029] Figure 7 This is a schematic diagram of the moving contact.

[0030] Figure 1-7 In the middle: 1. Outer shell; 2. Upper shell; 3. Base; 4. Functional foot; 5. Pin; 6. Button base; 7. Button piece; 8. Moving contact piece; 9. Spring; 10. Waterproof ring; 11. Push rod; 12. Connecting step; 13. Sealing step; 14. Through hole; 15. Connecting slot; 16. Spring cavity; 17. Slot; 18. Supporting step; 19. Alignment port; 20. Alignment boss; 21. Connecting part; 22. Widening part; 23. Widening boss; 24. Moving contact; 25. Raised ball; 26. Stationary contact. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] This utility model provides a push-button switch.

[0034] In this embodiment, refer to Figure 1-7 The push button switch includes a housing 1, a button assembly, an upper housing 2, a base 3, a function foot 4, and a pin 5. The function foot and pin are disposed on the base. The button assembly includes a button base 6, a button piece 7, a moving contact piece 8, a spring 9, and a waterproof ring 10. A push rod 11 extends from the bottom of the button base. Connecting steps 12 are provided on the outer walls of both sides of the bottom of the push rod 11. The upper end of the waterproof ring is sealed to the bottom of the button base, and the lower end is pressed between the sealing steps 13 of the upper housing and the outer housing.

[0035] The upper shell has a through hole 14 in the center for the push rod to extend into, and there are connecting slots 15 on both sides of the bottom of the through hole 14 that are connected to the connecting steps.

[0036] In the above technical solution, the button assembly consists of a button base, a button plate, a moving contact plate, a spring, and a waterproof ring. The push rod at the bottom of the button base has connecting steps on both sides, and the bottom of the through hole in the upper shell has corresponding connecting slots on both sides. The button base is fixed to the upper shell through the cooperation of the connecting steps and the connecting slots. The upper end of the waterproof ring is sealed to the bottom of the button base, and the lower end is pressed tightly by the sealing steps of the outer shell and the upper shell, forming a sealed structure and improving the sealing effect. During assembly, the button base is sequentially fitted with the button plate and the waterproof ring and then fixed to the upper shell. Next, the spring and the moving contact plate are assembled. Finally, the upper shell is fitted onto the base, the outer shell is installed, and the tail is riveted, allowing the entire switch to move within the plastic parts.

[0037] The elimination of multiple connecting steps in the housing reduces the precision requirements and simplifies the processing and assembly process; the housing is extruded with a waterproof ring to ensure the switch's waterproof performance; the push rod and through hole are shaped to fit each other, and when pressed, the moving contact always moves along the push rod axis during the pressing process, avoiding wobbling, effectively improving electrical reliability, and meeting the product's electrical, waterproof, and other requirements.

[0038] Specifically, the push rod is provided with a spring cavity 16, and slots 17 are provided on both sides of the spring cavity 16. A support step 18 is provided on the inner side of the bottom of the slot 17. The moving contact piece is installed in the slot and connected to the support step. The spring is installed in the spring cavity, with one end connected to the top wall of the spring cavity and the other end connected to the moving contact piece.

[0039] In this embodiment, the push rod has a spring cavity with slots on both sides and a supporting step on the inner side of the bottom of the slots. The moving contact is installed in the slot and connected to the supporting step. The spring is installed in the spring cavity, with one end connected to the top wall of the spring cavity and the other end connected to the moving contact. When the button is pressed, the spring is compressed, and the moving contact moves with the push rod to make contact with or separate from the stationary contact. The supporting step provides stable support for the moving contact. This ensures consistency and contact reliability during switch operation; the supporting step further improves the stability of the moving contact during operation and enhances the electrical performance of the switch.

[0040] Specifically, the upper shell has alignment openings 19 on both sides, and the base has alignment protrusions 20 that engage with the alignment openings.

[0041] In this embodiment, the upper shell is provided with alignment ports 19 on both sides, and the base is provided with alignment bosses that fit into the alignment ports. During assembly, the upper shell and the base are precisely positioned by fitting the alignment ports and the alignment bosses together.

[0042] Specifically, the movable contact includes a connecting portion 21 whose width is adapted to the slot width and a widening portion 22 provided at both ends of the connecting portion 21. The widening portion 22 has widening bosses 23 on both sides.

[0043] In this embodiment, the width of the connecting part of the moving contact is adapted to the width of the slot to ensure stable installation of the moving contact in the slot; the widened parts and widened bosses at both ends can play a limiting role to prevent the moving contact from moving in the slot, further enhancing the reliability of the contact between the moving contact 8 and the stationary contact 26, reducing the probability of poor contact, and improving the electrical conduction performance of the switch.

[0044] Specifically, a moving contact 24 is provided on the widened portion.

[0045] In this embodiment, a moving contact is provided on the widened portion. The moving contact is the key part for realizing electrical connection with the stationary contact piece. The on / off state of the circuit is controlled by the contact or separation between the moving contact and the stationary contact piece.

[0046] Specifically, the middle part of the connecting part is provided with a protruding ball 25 for connecting with one end of the spring.

[0047] In this embodiment, the convex ball in the middle of the connecting part is used to connect one end of the spring. The cooperation between the convex ball and the spring ensures that the spring is accurately positioned during the extension and contraction process, preventing the spring from shifting or falling off.

[0048] 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 push button switch comprising a housing, a push button assembly, an upper housing, a base, a functional foot and a lead, the functional foot and lead being provided on the base, characterized in that: The button assembly includes a button base, a button plate, a moving contact plate, a spring, and a waterproof ring. A push rod extends from the bottom of the button base, and connecting steps are provided on the outer walls of both sides of the bottom of the push rod. The upper end of the waterproof ring is sealed to the bottom of the button base, and the lower end is pressed between the sealing steps of the upper shell and the outer shell. The upper shell has a through hole in the center for the push rod to extend into, and there are connecting slots on both sides of the bottom of the through hole that are connected to the connecting steps.

2. The push button switch of claim 1, wherein: The push rod has a spring cavity, and slots are provided on both sides of the spring cavity. A support step is provided on the inner side of the bottom of the slot. The movable contact is installed in the slot and connected to the support step. The spring is installed in the spring cavity, with one end connected to the top wall of the spring cavity and the other end connected to the movable contact.

3. The pushbutton switch of claim 2, wherein: Alignment openings are provided on both sides of the upper shell, and alignment protrusions that fit into the alignment openings are provided on the base.

4. The push-button switch according to claim 1, characterized in that: The movable contact includes a connecting portion whose width is adapted to the slot width and a widening portion provided at both ends of the connecting portion, wherein the widening portion has widening bosses on both sides.

5. The pushbutton switch of claim 4, wherein: A moving contact is provided on the widened portion.

6. The pushbutton switch of claim 4, wherein: The middle part of the connecting part is provided with a protruding ball for connecting to one end of the spring.

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