Waterproof double circuit light touch switch with lamp

Abstract

This utility model discloses a waterproof dual-circuit tactile switch with an integrated light, comprising a switch housing with an internal accommodating chamber. Inside the switch housing, from top to bottom, are arranged an elastic keycap, an elastic coupling element, a conductive terminal group, and an LED light source. The top of the elastic keycap extends out of the switch housing, and its bottom end has a force-applying part for contacting the force-receiving part on the elastic coupling element. A support member is also provided inside the switch housing. The support end of the support member contacts and engages with the coupling part formed around the force-receiving part, so that when the elastic keycap is pressed, the elastic deformation of the elastic coupling element causes the coupling part of the elastic coupling element to switch between coupling states with the elastic terminal group. This utility model simplifies the internal structure, significantly reduces the thickness of the tactile switch, reduces space occupation, and facilitates product miniaturization.

Description

Technical Field

[0001] This utility model relates to the technical field of tactile switches, and in particular to a waterproof dual-circuit tactile switch with an integrated light. Background Technology

[0002] A tactile switch is a commonly used electronic switch. It is connected to a PCB board and can switch the conduction of functional circuits on the PCB board. When the tactile switch is pressed, one functional circuit is disconnected and the other is turned on. When the tactile switch is released, the states of the two functional circuits are restored.

[0003] Chinese patent number 201620614569.1 discloses a tactile switch with an LED, including a base, a button, a spring, and an LED light. The button includes a button driver and a transparent button piece, which is mounted on the button driver. A cavity is formed between the button driver and the transparent button piece, and two springs are disposed within the cavity. The LED light is disposed between the two springs. The connecting parts of the two springs pass through the side wall of the button driver and are exposed outside the button driver. A boss is provided on the lower end face of the connecting parts of the two springs. The button driver is slidably connected to the base, and the spring is disposed inside the base. A protrusion abutting against the spring is provided on the lower end face of the button driver. A connecting foot is provided in the base corresponding to the bosses on the two springs, and a spring is provided between the two connecting feet and the corresponding springs.

[0004] The aforementioned patent includes a spring inside the base as an elastic reset component. In order to accommodate the spring and ensure that the spring can extend and retract, the accommodating cavity inside the base needs to be enlarged accordingly, which leads to a corresponding increase in the overall size of the tactile switch, resulting in a large space occupation, making it difficult to achieve product miniaturization, and making it unsuitable for PCBs with dense power devices. Moreover, other components need to cooperate with the spring to achieve reset, which increases the complexity of the internal structure. Utility Model Content

[0005] The purpose of this utility model is to provide a waterproof dual-circuit tactile switch with an integrated light. This waterproof dual-circuit tactile switch with an integrated light simplifies the internal structure, significantly reduces the thickness of the tactile switch, thereby reducing space occupation and facilitating product miniaturization.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A waterproof dual-circuit tactile switch with an integrated light includes a switch housing with an internal accommodating chamber. Inside the switch housing, from top to bottom, are arranged a resilient keycap, a resilient coupling element, a conductive terminal group, and an LED light source. The top of the resilient keycap extends outside the switch housing, and its bottom end has a force-applying portion for contacting a force-receiving portion on the resilient coupling element. A support member is also provided inside the switch housing. The support end of the support member contacts and engages with a coupling portion formed around the force-receiving portion, such that when the resilient keycap is pressed, the elastic deformation of the resilient coupling element causes the coupling portion of the resilient coupling element to switch between coupling states with the resilient terminal group.

[0008] Based on the above technical solution, the present invention can be improved as follows:

[0009] Furthermore, the conductive terminal group includes a main input terminal, and a first circuit terminal and a second circuit terminal that can be paired with the main input terminal to conduct two circuits respectively; when the elastic coupling member is elastically deformed, the coupling part of the elastic coupling member and the elastic terminal group can switch from a first coupling state to a second coupling state.

[0010] The first coupling state is: the coupling part of the elastic coupling element is coupled to the main output terminal and the first circuit terminal, and decoupled from the second circuit terminal;

[0011] The second coupling state is: the coupling part of the elastic coupling element is coupled to the main output terminal and the second circuit terminal, and decoupled from the first circuit terminal.

[0012] Furthermore, a first contact is provided on the main input terminal, a second contact is provided on the first circuit terminal, and a third contact is provided on the second circuit terminal;

[0013] The elastic coupling member has a first coupling position on the coupling part that is coupled to the first contact, a second coupling position that is coupled to the second contact, and a third coupling position that is coupled to the third contact.

[0014] The first coupling position and the second coupling position are located at the bottom end of the coupling part, and the third coupling position is higher than the first coupling position and the second coupling position.

[0015] Furthermore, the support member includes a first support block and a second support block disposed on the bottom wall of the accommodating chamber; the first support block is located near the third contact point and supports the bottom end of the coupling portion of the elastic coupling member; the second support block is located near the second contact point and its top end supports the inner side of the coupling portion of the elastic coupling member; the top ends of the first support block and the second support block are the support ends.

[0016] Furthermore, the second support block forms a sharp corner at its top and an inclined surface on the side facing away from the sidewall of the receiving chamber;

[0017] When the force-bearing part of the elastic coupling member is squeezed, the coupling part remains coupled to the first contact at the first coupling position, the coupling part tilts upward and decouples from the second contact at the second coupling position, and the coupling part is coupled to the third contact at the third coupling position.

[0018] Furthermore, the elastic coupling element is a circular disc, with the top center of the circular disc being the force-bearing part. The circular disc bends downward from the force-bearing part to form an upwardly protruding arc-shaped sidewall, which serves as the coupling part. A light-transmitting hole is provided at the top center of the circular disc, through which the light generated by the LED light source passes through the light-transmitting hole, shines on the elastic keycap, and shines outward.

[0019] Furthermore, the main input terminal is provided with a first pin exposed outside the switch housing; the first circuit terminal is provided with a second pin exposed outside the switch housing; the second circuit terminal is provided with a third pin exposed outside the switch housing; and the LED light source is provided with a fourth pin exposed outside the switch housing.

[0020] Furthermore, the switch housing includes a switch base and a cover that are detachably connected to each other. The first pin, the second pin, the third pin and the fourth pin extend to the outside of the switch base and are bent and attached to the bottom surface of the switch base. The switch base has corresponding pin fitting grooves on the bottom surface.

[0021] Furthermore, the elastic keycap includes a cap body and a cap edge formed at the bottom end of the cap body; the top end of the cap body extends through the seat cover to form a switch seat, and the seat cover has a corresponding through hole; the cap edge has a sealing part formed at the bottom end, and when the switch seat and the seat cover are connected to each other, the bottom surface of the sealing part is in close contact with the top surface of the switch seat, and the top surface of the sealing part is in close contact with the bottom surface of the seat cover.

[0022] Furthermore, an annular transition groove is provided at the top of the junction of the cap brim and the cap body. The annular transition groove can form a clearance space so that the elastic keycap does not interfere with the bottom edge of the perforation when it is released and springs back.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] This invention features a support member inside the switch housing. The support end of the support member contacts and engages with the coupling part of the elastic coupling member. When the elastic keycap is pressed, the elastic coupling member is compressed and deformed, allowing it to couple or decouple from the conductive terminal group. This eliminates the need for an elastic reset member, enabling the device to reset when the elastic keycap is released. This simplifies the internal structure, significantly reduces the thickness of the light-touch switch, minimizes space occupation, and facilitates product miniaturization. Attached Figure Description

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 This is an assembly diagram of the illuminated waterproof dual-circuit tactile switch in the embodiment;

[0027] Figure 2 This is an exploded view of the illuminated, waterproof, dual-circuit tactile switch in the embodiment.

[0028] Figure 3 This is a schematic diagram of the top structure of the seat cover in the embodiment;

[0029] Figure 4 This is a schematic diagram of the bottom structure of the seat cover in the embodiment;

[0030] Figure 5 This is a schematic diagram of the elastic keycap structure in the embodiment;

[0031] Figure 6 This is a cross-sectional view of the illuminated waterproof dual-circuit tactile switch in the embodiment;

[0032] Figure 7 This is a schematic diagram of the top structure of the switch holder in the embodiment;

[0033] Figure 8 This is a schematic diagram of the bottom structure of the switch holder in the embodiment;

[0034] Figure 9 This is a schematic diagram of the circular disc structure in the embodiment;

[0035] Figure 10 This is a schematic diagram of the conductive terminal group in the embodiment;

[0036] Figure 11 A schematic diagram of an illuminated, waterproof, dual-circuit tactile switch with a DIP pin-type lead structure;

[0037] Figure 12 This is a schematic diagram of a waterproof dual-circuit tactile switch with an illuminated design and an Angle side-press pin structure.

[0038] The markings on the attached diagram are as follows: 1-Switch base, 101-Limiting flange, 102-Pin fitting groove, 103-Lamp slot, 104-Accommodating chamber, 2-Seat cover, 201-Cap edge groove, 202-Perforation, 3-Elastic keycap, 301-Cap body, 302-Cap edge, 303-Sealing part, 304-Force application part, 305-Annular transition groove, 4-Main input terminal, 401-First contact, 402-First pin, 5-First circuit terminal, 501-Second contact, 502-Second pin, 6-Second circuit terminal, 601-Third contact, 602-Third pin, 7-Light transmission hole, 8-Lock, 9-Lock block, 10-Limiting plate, 11-Circular disc, 12-First support block, 13-Second support block, 14-Surface mount LED light, 1401-Fourth pin. Detailed Implementation

[0039] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. These descriptions are intended to aid in understanding the utility model but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0040] See Figures 1 to 10 This embodiment relates to a waterproof dual-circuit tactile switch with an LED, which is mounted on a PCB board and can switch the two circuits on the PCB board on and off. The tactile switch includes a switch housing, and inside the switch housing, from top to bottom, there are a flexible keycap 3, a flexible coupling element, a conductive terminal group and an LED light source. The switch housing includes a switch base 1 and a base cover 2 that are connected to each other.

[0041] The cover 2 is provided with a perforation 202 so that the top of the elastic keycap 3 extends out of the switch base 1 for the operator to press; the bottom end of the elastic keycap 3 is formed with a sealing part 303 and a force-applying part 304. The sealing part 303 is used to seal the gap between the cover 2 and the switch base 1, and the force-applying part 304 is used to transmit the force when pressing the elastic keycap 3 to the elastic coupling member; the elastic coupling member has a force-receiving part that can contact the force-applying part 304 on the elastic keycap 3, and a coupling part formed around the force-receiving part. The coupling part forms two coupling states with the conductive terminal group in a coupling manner to conduct two circuits on the PCB board respectively.

[0042] The conductive terminal group includes a main input terminal 4 and two circuit terminals. For ease of description, the two circuit terminals in this embodiment are named the first circuit terminal 5 and the second circuit terminal 6, respectively. The first circuit terminal 5 is used to connect to the first circuit on the PCB board, and the second circuit terminal 6 is used to connect to the second circuit on the PCB board.

[0043] For ease of description, the two coupling states in this embodiment are respectively named the first coupling state and the second coupling state. In the first coupling state, the coupling part of the elastic coupling member is coupled with the main input terminal 4 and the first circuit terminal 5 to conduct the first circuit. In the second coupling state, the coupling part of the elastic coupling member is coupled with the main input terminal 4 and the second circuit terminal 6 to conduct the second circuit. That is to say, in both coupling states, the coupling part of the elastic coupling member is coupled with the main input terminal 4, coupled with one circuit terminal and decoupled from the other circuit terminal.

[0044] The switch base 1 has a housing chamber 104 inside to accommodate the elastic coupling member. When the elastic coupling member is squeezed by the elastic keycap 3, it can be elastically deformed in the housing chamber 104. A support member is provided in the housing chamber 104. The support member is used to switch the coupling state between the coupling part and the conductive terminal group when the elastic coupling member is elastically deformed.

[0045] When the elastic keycap 3 is pressed, the elastic coupling element deforms under pressure, and through the support element, the coupling part and the conductive terminal group in this embodiment switch from the first coupling state to the second coupling state. At this time, the first circuit is disconnected and the second circuit is connected. When the elastic keycap 3 is released, the elastic coupling element returns to its original state under its own elastic force, and through the support element, the coupling part and the conductive terminal group in this embodiment switch from the second coupling state to the first coupling state. At this time, the first circuit is connected and the second circuit is disconnected, thereby realizing the dual-circuit switching of the tactile switch. It should be noted that the tactile switch in this embodiment can also be applied to another dual-circuit switching method, that is: when the elastic keycap 3 is pressed, the coupling part and the conductive terminal group switch from the second coupling state to the first coupling state; when the elastic keycap 3 is released, the coupling part and the conductive terminal group switch from the first coupling state to the second coupling state. Those skilled in the art can select according to actual needs.

[0046] The elastic coupling has a light-transmitting hole 7 at the position opposite to the LED light source, so that the light generated by the LED light source can pass through the elastic coupling and shine on the elastic keycap 3 and then shine outward.

[0047] Specifically, the switch base 1 has a square base structure, and a mounting opening is formed on the top of the switch base 1. The elastic keycap 3, elastic coupling element, conductive terminal group and LED light source are installed into the switch base 1 through the mounting opening. Depending on the actual situation, other base structures suitable for installing the elastic keycap 3, elastic coupling element, conductive terminal group and LED light source can be used instead, such as rectangular or cylindrical base structures. The cover 2 is placed on the top mounting opening of the switch base 1.

[0048] The cover 2 is a square cover structure corresponding to the mounting opening of the switch base 1. The cover 2 is provided with latches 8 on opposite sides, and the switch base 1 is provided with latch blocks 9 on opposite sides. The latch blocks 9 and latches 8 are matched one-to-one to make the switch base 1 and the cover 2 detachably connected together. The latch block 9 is a rectangular block structure. The latch block 9 is provided with a right-angled guide part with a cross-section that is pointed at the top and wide at the bottom. The guide part forms a wedge-shaped surface on the outside. The latches 8 can slide along the wedge-shaped surface to the latch block 9 to complete the latching when it is latched. The latch 8 is a latching lug formed by bending downwards at 90° at the edge of the seat cover 2. The latching lug has two spaced connecting parts and a latching part connecting the two connecting parts. When latched, the two connecting parts of the latching lug fit against the two sides of the latching block 9, and the latching part of the latching lug fits against the bottom side of the latching block 9. The latching part of the latching lug bends upwards in the middle to form a latching angle, and the latching block 9 has a latching groove in the middle of its bottom side. The latching angle and the latching groove cooperate with each other to prevent the latching lug from detaching from the latching block 9 after latching, thereby improving the connection between the seat cover 2 and the switch base 1.

[0049] The cover 2 is provided with limiting plates 10 bent downward at 90° on the other opposite sides. When the cover 2 and the switch base 1 are connected to each other, the two limiting plates 10 can be fitted to the other opposite sides of the switch base 1 one by one to limit the cover 2 from moving perpendicular to the fitting surface of the limiting plate 10, thereby improving the connection between the cover 2 and the switch base 1.

[0050] It should be noted that in this embodiment, the switch base 1 and the cover 2 are detachably connected to each other by the one-to-one cooperation of the locking block 9 and the locking buckle 8. Depending on the actual situation, other detachable connection structures in the prior art can also be used to replace the locking block 9 and the locking buckle 8.

[0051] The flexible keycap 3 is integrally molded from a light-transmitting silicone material, comprising a cap body 301 and a cap edge 302. The cap body 301 has a cylindrical structure, with its top end extending axially out of the switch base 1 from the through hole 202 in the base cover 2. The cap edge 302 has a ring-shaped structure, extending outward from the bottom end of the cap body 301. The bottom end of the cap edge 302 forms a square-shaped sealing portion 303. Because the flexible keycap 3 is integrally molded from a light-transmitting silicone material, and silicone itself is elastic, the flexible keycap 3 as a whole is also elastic. When released, the pressed flexible keycap 3 can rely on its own elasticity... The sealing part 303 on the elastic keycap 3 is compressed to form an elastic force when the seat cover 2 and the switch seat 1 are connected. This makes the top surface of the sealing part 303 fit tightly against the bottom surface of the seat cover 2, and the bottom surface of the sealing part 303 on the elastic keycap 3 fit tightly against the top surface of the switch seat 1, thereby sealing the gap between the seat cover 2 and the switch seat 1, effectively preventing external liquid from entering the interior of the switch seat 1 and improving the waterproof performance. It should be noted that in this embodiment, the sealing part 303 is in the shape of a square plate. Depending on the actual situation, other shapes of sealing parts 303 can also be provided, such as circular or rectangular plate-shaped sealing parts 303.

[0052] The cover 2 has a recessed groove 201 at the through hole 202, forming a brim groove 201 from bottom to top. The diameter of the brim groove 201 corresponds to the diameter of the brim 302, and the depth of the brim groove 201 corresponds to the thickness of the brim 302. The through hole 202 is located at the center of the top wall of the brim groove 201. When the cap 301 extends out of the switch base 1 from the through hole 202, the brim 302 fits into the brim groove 201 to prevent the elastic keycap 3 from detaching from the switch base 1 from the through hole 202. It should be noted that in order to ensure that the elastic keycap 3 can be pressed normally... The diameter of the perforation 202 on the cover 2 should be larger than the diameter of the cap 301 so that the cap 301 on the elastic keycap 3 can move axially relative to the cover 2 at the perforation 202 when it is pressed. The top of the joint between the cap edge 302 and the cap 301 is provided with an annular transition groove 305 with a circular arc cross section. The annular transition groove 305 can form a clearance space to avoid interference between the elastic keycap 3 and the bottom edge of the perforation 202 when it is released and rebounds, ensuring that the elastic keycap 3 rebounds and resets smoothly, reducing scratches and extending the service life of the elastic keycap 3 accordingly.

[0053] The cap body 301 has a force-applying part 304 at the center of the bottom surface. The force-applying part 304 is a conical protrusion with a diameter that gradually decreases from top to bottom. Since the conical protrusion itself has the ability to resist lateral forces in the horizontal direction, it can resist the horizontal force to a certain extent. When the elastic keycap 3 is pressed, the conical protrusion can abut against the force-bearing part of the elastic coupling member in the vertical direction, avoiding tilting and ensuring that the force when pressing the elastic keycap 3 is transmitted vertically to the elastic coupling member. This increases the elastic deformation speed of the elastic coupling member, shortens the switching time between the two coupling states, and thus improves the dual-circuit switching sensitivity of the tactile switch.

[0054] The switch base 1 has a limiting flange 101 on its top surface. The limiting flange 101 can be embedded in the bottom surface of the sealing part 303 of the elastic keycap 3 when the base cover 2 and the switch base 1 are connected to each other, so as to limit the elastic keycap 3 radially and prevent the elastic keycap 3 from moving radially when the base cover 2 and the switch base 1 are connected to each other. This ensures that the force-applying part 304 of the elastic keycap 3 and the force-receiving part of the elastic keycap 3 can be in vertical contact when the elastic keycap 3 is pressed.

[0055] The elastic coupling element is a circular disc 11 with a diameter that gradually increases from the top to the bottom. The circular disc 11 is made of an elastic conductive material, such as copper. The middle of the top of the circular disc 11 is the force-receiving part. When the elastic keycap 3 is pressed, the force-receiving part can contact the force-applying part 304 of the elastic keycap 3 so as to receive the force applied by the elastic keycap 3. The circular disc 11 bends downward from the force-receiving part to form an upwardly convex arc-shaped sidewall, which serves as the coupling part. When the force-receiving part receives the applied force, the coupling part can elastically deform to couple or decouple with the elastic terminal group. When the elastic keycap 3 is pressed, the circular disc 11 can be squeezed into a flat shape, and the coupling state between the coupling part of the circular disc 11 and the elastic terminal group is switched by the support member in the switch base 1.

[0056] The circular disc 11 has three coupling positions on the coupling part. The three coupling positions are arranged at intervals around the center of the circular disc 11 and can be coupled to the three terminals one by one. Specifically, the three coupling positions are the first coupling position and the second coupling position located at the bottom end of the circular disc 11, and the third coupling position located near the bottom edge of the circular disc 11. The first coupling position is coupled to the main input terminal 4, the second coupling position is coupled to the first circuit terminal 5, and the third coupling position is coupled to the second circuit terminal 6.

[0057] In the first coupling state, the support member enables the coupling portion of the circular disc 11 to couple with the main input terminal 4 at the first coupling position, couple with the first circuit terminal 5 at the second coupling position, and decouple from the second circuit terminal 6 at the third coupling position. In the second coupling state, the support member enables the coupling portion of the circular disc 11 to remain coupled with the main input terminal 4 at the first coupling position, decouple from the first circuit terminal 5 at the second coupling position, and couple with the second circuit terminal 6 at the third coupling position.

[0058] The light-transmitting hole 7 is located at the center of the force-bearing part of the circular disc 11. The diameter of the light-transmitting hole 7 is smaller than the diameter of the force-applying part 304 on the elastic keycap 3, so as to prevent the force-applying part 304 on the elastic keycap 3 from being embedded into the circular disc 11 through the light-transmitting hole 7, so that the force-bearing part of the circular disc 11 can maintain force contact with the force-applying part 304 on the elastic keycap 3 when the keycap is pressed.

[0059] The main input terminal 4 and the two circuit terminals are all made of conductive metal material, and each includes an integrally formed connecting part and a contact part. The connecting part is embedded in the switch base 1, and the contact part is exposed outside the switch base 1.

[0060] Specifically, the main input terminal 4 is provided with a first contact 401 exposed on the bottom wall of the accommodating chamber 104 inside the switch base 1, and a first pin 402 exposed outside the switch base 1; the first contact 401 and the first pin 402 constitute the contact portion of the first terminal; the first contact 401 is used to couple the coupling portion of the circular disc 11, and the first pin 402 is used to connect to the PCB board.

[0061] The first circuit terminal 5 is provided with a second contact 501 exposed on the bottom wall of the receiving chamber 104 inside the switch base 1, and a second pin 502 exposed outside the switch base 1; the second contact 501 and the second pin 502 constitute the contact portion of the first circuit terminal 5; the second contact 501 is used to couple the coupling portion of the circular disc 11, and the second pin 502 is used to connect to the PCB board.

[0062] The second circuit terminal 6 is provided with a third contact 601 exposed on the bottom wall of the receiving chamber 104 inside the switch base 1, and a third pin 602 exposed outside the switch base 1; the third contact 601 and the third pin 602 constitute the contact portion of the second circuit terminal 6; the third contact 601 is used to couple the coupling portion of the circular disc 11, and the third pin 602 is used to connect to the PCB board.

[0063] The switch base 1 is plastic-coated with the main input terminal 4 and two circuit terminals, and after plastic coating, the first contact 401 on the main input terminal 4 and the second contact 501 on the first circuit terminal 5 are positioned opposite to the bottom of the circular disc 11, and the third contact 601 on the second circuit terminal 6 is positioned opposite to the bottom of the circular disc 11.

[0064] In the first coupling state, the coupling portion of the circular disc 11 can be coupled with the first contact 401 and the second contact 501, and decoupled from the third contact 601; in the second coupling state, the coupling portion of the circular disc 11 can be coupled with the first contact 401 and the third contact 601, and decoupled from the second contact 501.

[0065] Since the coupling part of the circular disc 11 is an upwardly convex arc-shaped sidewall, the third coupling position on the coupling part is not on the same horizontal plane as the first coupling position and the second coupling position. Specifically, the first coupling position and the second coupling position are on the same horizontal plane, and the third coupling position is higher than the first coupling position and the second coupling position. This allows the first contact 401 and the second contact 501 to couple with the coupling part of the circular disc 11 before the third contact 601. As a result, when the first contact 401 and the second contact 501 couple with the coupling part of the circular disc 11, the third contact 601 can remain decoupled from the coupling part of the circular disc 11 without contact, thereby achieving the first coupling state.

[0066] The first pin 402, the second pin 502 and the third pin 602 extend to the outside of the switch base 1 and are bent and attached to the bottom surface of the switch base 1. The switch base 1 has corresponding pin fitting grooves 102 on the bottom surface to facilitate the insertion of the bent pins, thereby reducing the overall size of the tactile switch.

[0067] In this embodiment, the main input terminal 4 forms a first pin 402 on one side, the first circuit terminal 5 forms a second pin 502 on one side, and the second circuit terminal 6 forms a third pin 602 on each of the opposite sides. The first pin 402 and one of the third pins 602 extend from one side of the switch base 1, and the second pin 502 and the other third pin 602 extend from the other side of the switch base 1. The four pins can form four solder points at the bottom of the tactile switch, so that the tactile switch can be soldered and fixed to the PCB board, ensuring uniform force and improving firmness. At the same time, it reduces the gap between the soldered tactile switch and the PCB board, which helps to reduce space occupation.

[0068] The support includes a first support block 12 and a second support block 13 disposed on the bottom wall of the accommodating chamber 104. The first support block 12 is located near the third contact 601, and the second support block 13 is located near the second contact 501. The tops of the two support blocks are support ends.

[0069] The first support block 12 is a rectangular block structure. In the first coupling state, the top of the first support block 12 supports the bottom of the circular disc 11 and forms a first fulcrum at the support point. The coupling part of the circular disc 11 is coupled to the first contact 401 at the first coupling position and forms a second fulcrum at the coupling point. The coupling part of the circular disc 11 is coupled to the second contact 501 at the second coupling position and forms a third fulcrum at the coupling point. The three fulcrums are arranged in a triangle around the center of the circular disc 11, supporting the circular disc 11 on the bottom wall of the accommodating chamber 104. The height of the first support block 12 is the same as the height of the first contact 401 and the second contact 501, so that the circular disc 11 can be supported on the same horizontal plane by the three fulcrums, thereby improving the support stability of the circular disc 11. The first support block 12 has a flat support surface at the top, so as to increase the contact area with the coupling part of the circular disc 11 and further improve the stability of the circular disc 11.

[0070] The second support block 13 is a right-angled triangular block structure with a pointed top and a wide bottom. The side facing the side wall of the accommodating chamber 104 is a vertical surface, and the side facing away from the side wall of the accommodating chamber 104 is an inclined surface that slopes downward.

[0071] When switching coupling states, pressing the elastic keycap 3 causes the circular disc 11 to deform elastically under pressure. The circular disc 11 couples with the third contact 601 at the third coupling position. The top of the first support block 12 supports the bottom of the circular disc 11. The top of the second support block 13 supports the inner side of the arc-shaped sidewall of the circular disc 11. Using the seesaw principle, the top of the second support block 13 acts as a fulcrum, and the force-bearing part of the circular disc 11 is compressed. The arc-shaped sidewall corresponding to the force-bearing part and the top of the second support block 13 bends downward. The inclined surface of the second support block 13 forms a clearance space for the arc-shaped sidewall of this part to bend downward. The arc-shaped sidewall corresponding to the second coupling position of the circular disc 11 and the top of the second support block 13 bends upward, so that the circular disc 11 decouples from the second contact 501 at the second coupling position. Since no support is provided near the first contact 401, the circular disc 11 remains coupled with the first contact 401 at the first coupling position, thereby completing the switching of the second coupling state.

[0072] By using the support member in this embodiment, the coupling or decoupling stroke between the elastic coupling member and the terminal can be shortened, the switching time of the coupling state can be reduced, and the sensitivity of the tactile switch can be improved. During the switching process, the coupling part of the circular disc 11 always remains coupled to the contact on one of the terminals. It is only necessary to decouple or couple the contact on the other terminal during the switching. Compared with the prior art, it is not necessary to simultaneously couple or decouple the contacts on two terminals to complete the coupling state switching, which improves the reliability of the tactile switch. Moreover, in this embodiment, there is no need to set an elastic reset member. The reset can be completed by relying on the elastic keycap 3 and the elastic force of the circular disc 11 itself, which significantly reduces the overall thickness of the tactile switch and is conducive to miniaturization.

[0073] It should be noted that, depending on the actual situation, the first support block 12 and the second support block 13 in this embodiment can also be replaced by other suitable shapes and structures for coupling or decoupling the circular disc 11 with the contacts on the terminal. For example, the first support block 12 is a circular block structure, and the second support block 13 is a cylindrical block structure with a sharp corner at the top and an inclined surface on one side.

[0074] A lamp groove 103 is provided in the middle of the bottom wall of the accommodating chamber 104 of the switch base 1, and an LED light source is placed in the lamp groove 103. In this embodiment, the LED light source is a surface-mount LED lamp 14. The surface-mount LED lamp 14 is provided with a fourth pin 1401 at the positive and negative terminals respectively. The fourth pin 1401 extends out of the switch base 1, bends downward and fits against the bottom surface of the switch base 1. The switch base 1 has a corresponding pin fitting groove 102 on the bottom surface to facilitate the insertion of the bent pin, thereby reducing the overall size of the tactile switch. When the tactile switch is installed, the fourth pin 1401 is soldered to the PCB board so that the positive and negative terminals of the surface-mount LED lamp 14 can be connected to the light source circuit to conduct light. The LED light source is not controlled by the tactile switch in this embodiment, but by the light source circuit to which it is connected. Therefore, the LED light source is connected to the light source circuit in a normally open state. The tactile switch is only used for switching the two functional circuits on the PCB board other than the light source circuit.

[0075] It should be noted that the four pins in this embodiment are SMT surface mount pin structures. However, depending on actual needs, other existing pin structures suitable for connecting to the PCB board can also be used, such as: Figure 11 The DIP pin type shown Figure 12 The Angle side press shown.

[0076] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A waterproof dual-circuit tactile switch with an integrated light, comprising a switch housing with an internal accommodating chamber, wherein, from top to bottom, a resilient keycap, a resilient coupling element, a conductive terminal group, and an LED light source are sequentially arranged within the switch housing; characterized in that, The top of the elastic keycap extends out of the switch housing, and the bottom end is provided with a force-applying part for contacting the force-receiving part on the elastic coupling member; a support member is also provided inside the switch housing, and the support end of the support member contacts and cooperates with the coupling part formed around the force-receiving part, so that when the elastic keycap is pressed, the elastic deformation of the elastic coupling member causes the coupling part of the elastic coupling member to switch the coupling state with the conductive terminal group.

2. The waterproof double-circuit tactile switch with a light according to claim 1, characterized in that, The conductive terminal group includes a main input terminal, and a first circuit terminal and a second circuit terminal that can be paired with the main input terminal to conduct two circuits respectively; when the elastic coupling member is elastically deformed, the coupling part of the elastic coupling member and the elastic terminal group can switch from a first coupling state to a second coupling state. The first coupling state is: the coupling part of the elastic coupling element is coupled to the main output terminal and the first circuit terminal, and decoupled from the second circuit terminal; The second coupling state is: the coupling part of the elastic coupling element is coupled to the main output terminal and the second circuit terminal, and decoupled from the first circuit terminal.

3. The waterproof double-circuit tactile switch with a light according to claim 2, characterized in that, The main input terminal is provided with a first contact, the first circuit terminal is provided with a second contact, and the second circuit terminal is provided with a third contact; The elastic coupling member has a first coupling position on the coupling part that is coupled to the first contact, a second coupling position that is coupled to the second contact, and a third coupling position that is coupled to the third contact. The first coupling position and the second coupling position are located at the bottom end of the coupling part, and the third coupling position is higher than the first coupling position and the second coupling position.

4. The waterproof double-circuit tactile switch with a light according to claim 3, characterized in that, The support includes a first support block and a second support block disposed on the bottom wall of the accommodating chamber; the first support block is located near the third contact point and supports the bottom end of the coupling portion of the elastic coupling member; the second support block is located near the second contact point and its top end supports the inner side of the coupling portion of the elastic coupling member; the top ends of the first support block and the second support block are the support ends.

5. The illuminated waterproof dual-circuit tactile switch according to claim 4, characterized in that, The second support block forms a sharp corner at its top and an inclined surface on the side facing away from the sidewall of the receiving chamber; When the force-bearing part of the elastic coupling member is squeezed, the coupling part remains coupled to the first contact at the first coupling position, the coupling part tilts upward and decouples from the second contact at the second coupling position, and the coupling part is coupled to the third contact at the third coupling position.

6. The waterproof double-circuit tactile switch with a light according to claim 2, characterized in that, The elastic coupling element is a circular disc, with the top center of the circular disc being the force-bearing part. The circular disc bends downward from the force-bearing part to form an upwardly protruding arc-shaped sidewall, which serves as the coupling part. A light-transmitting hole is provided at the top center of the circular disc, through which the light generated by the LED light source passes through the light-transmitting hole, shines on the elastic keycap, and shines outward.

7. The waterproof double-circuit tactile switch with a light according to any one of claims 2 to 6, characterized in that, The main input terminal has a first pin exposed outside the switch housing; the first circuit terminal has a second pin exposed outside the switch housing; the second circuit terminal has a third pin exposed outside the switch housing; and the LED light source has a fourth pin exposed outside the switch housing.

8. The waterproof double-circuit tactile switch with a light according to claim 7, characterized in that, The switch housing includes a switch base and a cover that are detachably connected to each other. The first pin, the second pin, the third pin and the fourth pin extend to the outside of the switch base and are bent and attached to the bottom surface of the switch base. The switch base has corresponding pin fitting grooves on the bottom surface.

9. The waterproof double-circuit tactile switch with a light according to claim 8, characterized in that, The elastic keycap includes a cap body and a cap edge formed at the bottom end of the cap body; the top end of the cap body extends through the seat cover to form a switch seat, and the seat cover has a corresponding through hole; the cap edge has a sealing part formed at the bottom end, and when the switch seat and the seat cover are connected to each other, the bottom surface of the sealing part is in close contact with the top surface of the switch seat, and the top surface of the sealing part is in close contact with the bottom surface of the seat cover.

10. The illuminated waterproof dual-circuit tactile switch according to claim 9, characterized in that, An annular transition groove is provided at the top of the junction of the cap brim and the cap body. The annular transition groove can form a clearance space so that the elastic keycap does not interfere with the bottom edge of the perforation when it is released and springs back.

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