Waterproof double-loop touch switch with lamp

Abstract

The waterproof double-loop touch switch with the lamp comprises a switch shell internally provided with a containing cavity, and an elastic key cap, an elastic coupling piece, a conductive terminal set and an LED light source are sequentially arranged in the switch shell from top to bottom; the top end of the elastic key cap extends out of the switch shell, and the bottom end of the elastic key cap is provided with a force application part which is used for being stressed to be in contact with the stress part on the elastic coupling piece; a supporting piece is further arranged in the switch shell, and the supporting end of the supporting piece is in contact fit with a coupling part formed around the stress part, so that when the elastic key cap is pressed, the elastic deformation of the elastic coupling piece drives the coupling part of the elastic coupling piece to switch the coupling state with the elastic terminal group; according to the invention, the internal structure can be simplified, the thickness of the touch switch is obviously reduced, the occupied space is reduced, and product miniaturization is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of light touch switches, in particular to a waterproof double-circuit light touch switch with a light. Background Art

[0002] A tact switch is a commonly used electronic switch. Connected to a printed circuit board (PCB), it switches the functional circuits on the PCB. When the tact switch is pressed, one functional circuit is disconnected and the other is connected. When the tact switch is released, the states of the two functional circuits are restored.

[0003] Chinese patent No. 201620614569.1 discloses a light-touch switch with light, including a base, a button, a spring, and an LED light. The button includes a button driver and a transparent button sheet. The transparent button sheet is installed on the button driver. A accommodating cavity is formed between the button driver and the transparent button sheet. Two springs are arranged in the accommodating cavity. The LED light is arranged between the two springs. The connecting parts of the two springs pass through the side walls of the button driver respectively and are exposed outside the button driver. A boss is respectively provided on the lower end surface of the connecting part of the two springs. The button driver is slidably connected to the base, the spring is arranged in the base, and a protrusion is provided on the lower end surface of the button driver that abuts against the spring. A connecting foot is respectively provided at the bosses on the two springs in the base corresponding to the bosses on the two springs, and a spring is respectively provided between the two connecting feet and the corresponding springs.

[0004] In the above patent, a spring is provided inside the base as an elastic reset member. In order to accommodate the spring and ensure that the spring can be extended and retracted, the accommodating cavity inside the base needs to be increased accordingly, resulting in a corresponding increase in the overall size of the touch switch. The space occupied is large, and it is difficult to achieve product miniaturization. It cannot be applied to PCB boards with dense power devices. In addition, other components need to cooperate with the spring to achieve reset, which increases the complexity of the internal structure. Summary of the Invention

[0005] The purpose of the present invention is to provide a waterproof dual-circuit tact switch with a light, which can simplify the internal structure and significantly reduce the thickness of the tact switch, thereby reducing space occupation and facilitating product miniaturization.

[0006] The purpose of the present invention is achieved through the following technical solutions: A waterproof dual-circuit tact switch with light, comprising a switch housing with an accommodating chamber formed therein, wherein an elastic keycap, an elastic coupling member, a conductive terminal group, and an LED light source are sequentially arranged in the switch housing from top to bottom; the top end of the elastic keycap extends out of the switch housing, and the bottom end is provided with a force-applying portion for contacting a force-bearing portion on the elastic coupling member; a support member is further provided in the switch housing, and the supporting end of the support member contacts and cooperates with a coupling portion formed around the force-bearing portion, so that when the elastic keycap is pressed, the elastic deformation of the elastic coupling member drives the coupling portion of the elastic coupling member to switch the coupling state with the elastic terminal group.

[0007] On the basis of the above technical solution, the present invention can be improved as follows: 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 portion 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 portion of the elastic coupling member is coupled to the main output terminal and the first loop terminal, and decoupled from the second loop terminal; The second coupling state is that the coupling portion of the elastic coupling member is coupled to the main output terminal and the second loop terminal, and is decoupled from the first loop terminal.

[0008] Furthermore, the main input terminal is provided with a first contact, the first loop terminal is provided with a second contact, and the second loop terminal is provided with a third contact; The elastic coupling member forms a first coupling position corresponding to the first contact, a second coupling position corresponding to the second contact, and a third coupling position corresponding to the third contact on the coupling portion. The first coupling position and the second coupling position are located at the bottom end of the coupling portion, and the third coupling position is higher than the first coupling position and the second coupling position.

[0009] Furthermore, the support member includes a first support block and a second support block arranged on the bottom wall of the accommodating chamber; the first support block is located near the third contact and supports the bottom end of the coupling part of the elastic coupling member; the second support block is located near the second contact, and the top end supports the inner side of the coupling part of the elastic coupling member; the top ends of the first support block and the second support block are the support ends.

[0010] Furthermore, the second supporting block forms a sharp corner at the top end and forms an inclined surface on the side facing away from the side wall of the accommodating chamber; When the force-bearing portion of the elastic coupling member is squeezed, the coupling portion remains coupled with the first contact at the first coupling position, the coupling portion tilts upward and decouples from the second contact at the second coupling position, and the coupling portion couples with the third contact at the third coupling position.

[0011] Furthermore, the elastic coupling part is a circular disc, the middle of the top of the circular disc is the force-bearing part, the circular disc bends downward and extends from the force-bearing part to form an upwardly protruding arc-shaped side wall and serves as the coupling part; the circular disc is provided with a light-transmitting hole in the middle of the top, and the bright light generated by the LED light source passes through the light-transmitting hole through the circular disc and shines on the elastic keycap and outward.

[0012] 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.

[0013] Furthermore, the switch housing includes a switch base and a base cover that are detachably connected to each other, and 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 is provided with corresponding pin engagement grooves on the bottom surface.

[0014] Furthermore, the elastic keycap includes a cap body and a brim formed at the bottom end of the cap body; the top end of the cap body extends out of the switch seat through the seat cover, and the seat cover is provided with corresponding through-holes; the brim is formed with a sealing portion at the bottom end, and when the switch seat and the seat cover are connected to each other, the bottom surface of the sealing portion is tightly fitted with the top surface of the switch seat, and the top surface of the sealing portion is tightly fitted with the bottom surface of the seat cover.

[0015] Furthermore, an annular transition groove is provided at the top of the joint between the brim and the cap body, and the annular transition groove can form an escape space so that the elastic keycap does not interfere with the bottom edge of the perforation when it is released and rebounds.

[0016] Compared with the prior art, the technology of the present invention has the following advantages: The present invention provides a support member in the switch housing, and the support end of the support member contacts and cooperates with the coupling portion of the elastic coupling member. When the elastic keycap is pressed, the elastic coupling member is squeezed and elastically deformed, so that the elastic coupling member is coupled or decoupled with the conductive terminal group. There is no need to provide an elastic reset member to achieve reset when the elastic keycap is released. The internal structure can be simplified, the thickness of the light touch switch can be significantly reduced, the space occupied is reduced, and it is conducive to miniaturization of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Figure 1 This is an assembly diagram of a waterproof dual-circuit tact switch with light in the embodiment; Figure 2 This is an exploded view of a waterproof dual-circuit tact switch with light in the embodiment; Figure 3 Schematic diagram of the top structure of the seat cover in the embodiment; Figure 4 Schematic diagram of the bottom structure of the seat cover in the embodiment; Figure 5 Schematic diagram of the structure of the elastic keycap in the embodiment; Figure 6 This is a cross-sectional view of a waterproof dual-circuit tact switch with light in an embodiment; Figure 7 This is a schematic diagram of the top structure of the switch base in the embodiment; Figure 8 Schematic diagram of the bottom structure of the switch base in the embodiment; Figure 9 Schematic diagram of the structure of the circular disc in the embodiment; Figure 10 Schematic diagram of the structure of the conductive terminal group in the embodiment; Figure 11 This is a schematic diagram of a waterproof dual-circuit tact switch with an indicator light and a DIP pin structure; Figure 12 This is a schematic diagram of a waterproof, dual-circuit tact switch with an illuminated light and an Angle side-press pin structure.

[0018] Markings on the accompanying drawings: 1-switch base, 101-limiting flange, 102-pin fitting groove, 103-lamp groove, 104-accommodating chamber, 2-base cover, 201-cap brim groove, 202-perforation, 3-elastic keycap, 301-cap body, 302-cap brim, 303-sealing part, 304-force-applying 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-transmitting hole, 8-lock, 9-lock block, 10-limiting plate, 11-circular disc, 12-first support block, 13-second support block, 14-SMD LED lamp, 1401-fourth pin. DETAILED DESCRIPTION

[0019] The following further describes the specific embodiments of the present invention in conjunction with the accompanying drawings. The description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0020] See also Figures 1 to 10 This embodiment relates to a waterproof dual-circuit tact switch with an indicator light, which is installed on a PCB board and can switch the two circuits on the PCB board on and off. The tact switch includes a switch housing, in which an elastic keycap 3, an elastic coupling member, a conductive terminal group, and an LED light source are arranged in order from top to bottom. The switch housing includes a switch base 1 and a base cover 2 that are connected to each other.

[0021] The base cover 2 is provided with a perforation 202 to facilitate the top end of the elastic keycap 3 to extend outside the switch base 1 for pressing by the operator; the bottom end of the elastic keycap 3 is formed with a sealing portion 303 and a force-applying portion 304, the sealing portion 303 is used to seal the gap between the base cover 2 and the switch base 1, and the force-applying portion 304 is used to transmit the force applied when the elastic keycap 3 is pressed to the elastic coupling member; the elastic coupling member has a force-bearing portion that can be in force contact with the force-applying portion 304 on the elastic keycap 3, and a coupling portion formed around the force-bearing portion. The coupling portion is coupled with the conductive terminal group to form two coupling states to respectively connect two circuits on the PCB board.

[0022] The conductive terminal group includes a main input terminal 4 and two loop terminals. For the sake of convenience, the two loop terminals in this embodiment are named as the first loop terminal 5 and the second loop terminal 6 respectively. The first loop terminal 5 is used to connect to the first loop on the PCB board, and the second loop terminal 6 is used to connect to the second loop on the PCB board.

[0023] For ease of description, the two coupling states in this embodiment are named as the first coupling state and the second coupling state respectively; in the first coupling state, the coupling portion of the elastic coupling member is coupled with the main input terminal 4 and the first loop terminal 5 to conduct the first loop; in the second coupling state, the coupling portion of the elastic coupling member is coupled with the main input terminal 4 and the second loop terminal 6 to conduct the second loop; that is, in both coupling states, the coupling portion of the elastic coupling member remains coupled with the main input terminal 4, coupled with one of the loop terminals, and decoupled from the other loop terminal.

[0024] A housing chamber 104 for accommodating an elastic coupling member is formed inside the switch base 1. The elastic coupling member can be elastically deformed in the housing chamber 104 when squeezed by the elastic keycap 3. A support member is provided in the housing chamber 104. The support member is used to switch the coupling state between the coupling portion and the conductive terminal group when the elastic coupling member is elastically deformed.

[0025] When the elastic keycap 3 is pressed, the elastic coupling is deformed by pressure, and the support member is used to switch the coupling portion and the conductive terminal group in this embodiment 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 is restored under the action of its own elastic force, and the support member is used to switch the coupling portion and the conductive terminal group in this embodiment 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 touch switch; it should be noted that the touch switch in this embodiment can also be applied to another dual-circuit switching mode, namely: when the elastic keycap 3 is pressed, the coupling portion and the conductive terminal group are switched from the second coupling state to the first coupling state; when the elastic keycap 3 is released, the coupling portion and the conductive terminal group are switched from the first coupling state to the second coupling state. Those skilled in the art can select according to actual needs.

[0026] The elastic coupling member is provided with a light-transmitting hole 7 at a position opposite to the LED light source, so that the bright light generated by the LED light source can pass through the elastic coupling member and illuminate the elastic keycap 3 and then be transmitted outwards.

[0027] Specifically, the switch base 1 has a square base structure, and a mounting opening is formed on the top of the switch base 1, through which the elastic keycap 3, elastic coupling member, conductive terminal group and LED light source are easily installed into the switch base 1; depending on actual conditions, other base structures suitable for installing the elastic keycap 3, elastic coupling member, conductive terminal group and LED light source can also be used instead, such as a rectangular or cylindrical base structure; the base cover 2 is arranged on the top mounting opening of the switch base 1.

[0028] The seat cover 2 is a square cover structure corresponding to the installation opening of the switch seat 1. The seat cover 2 is provided with lock buckles 8 on opposite sides, and the switch seat 1 is provided with lock blocks 9 on opposite sides. The lock blocks 9 and the lock buckles 8 are matched one by one to make the switch seat 1 and the seat cover 2 detachably connected to each other. The lock buckle block 9 is a rectangular block structure. The lock buckle block 9 is provided with a right-angled guide portion with a pointed upper section and a wide lower section at the top. The guide portion forms a wedge-shaped surface on the outside. The lock buckle 8 can slide along this wedge-shaped surface to the lock buckle block 9 to complete the buckle when snapping. The lock buckle 8 is a lock ear bent downward by 90° at the edge of the seat cover 2. The lock ear has two connecting parts arranged at intervals and a snap part connecting the two connecting parts; when snapping, the two connecting parts of the lock ear fit into the two sides of the lock buckle block 9, and the snap part of the lock ear fits into the bottom side of the lock buckle block 9; the snap part of the lock ear is bent upward in the middle to form a snap angle, and the lock buckle block 9 is provided with a snap groove in the middle of the bottom side. The snap angle and the snap groove cooperate with each other to prevent the lock ear from detaching from the lock buckle block 9 after snapping, thereby improving the connection firmness between the seat cover 2 and the switch seat 1.

[0029] The seat cover 2 is provided with limit plates 10 bent downward 90° on the other two opposite sides. When the seat cover 2 and the switch seat 1 are connected to each other, the two limit plates 10 can be fitted one-to-one with the other opposite sides of the switch seat 1 to limit the movement of the seat cover 2 perpendicular to the fitting surface of the limit plates 10, thereby improving the connection firmness between the seat cover 2 and the switch seat 1.

[0030] It should be noted that, in this embodiment, the lock block 9 and the lock 8 are matched one-to-one to achieve the detachable connection between the switch seat 1 and the seat cover 2. According to actual conditions, other detachable connection structures in the prior art can also be used to replace the lock block 9 and the lock 8.

[0031] The elastic keycap 3 is made of a light-transmitting silicone material and includes a cap body 301 and a cap brim 302. The cap body 301 is a cylindrical structure, and the top of the cap body 301 extends axially from the through-hole 202 of the base cover 2 to the outside of the switch base 1; the cap brim 302 is a circular ring structure, extending from the bottom end of the cap body 301 to the surrounding area; the bottom end of the cap brim 302 forms a square sheet-shaped sealing portion 303; since the elastic keycap 3 is made of a light-transmitting silicone material and is formed as a whole, the silicone itself is elastic, and thus the elastic keycap 3 as a whole is also elastic; when released, the pressed elastic keycap 3 can rely on its own elasticity to and when the base cover 2 and the switch base 1 are connected to each other, the sealing portion 303 on the elastic keycap 3 is compressed to form an elastic force, so that the top surface of the sealing portion 303 is kept in close contact with the bottom surface of the base cover 2, and the bottom surface of the sealing portion 303 on the elastic keycap 3 is kept in close contact with the top surface of the switch base 1, thereby sealing the gap between the base cover 2 and the switch base 1, effectively preventing external liquid from entering the interior of the switch base 1, and improving the waterproof performance; it should be noted that, in this embodiment, the sealing portion 303 is in the shape of a square sheet. According to actual conditions, a sealing portion 303 of other shapes may also be provided, such as a sealing portion 303 in the shape of a circular or rectangular sheet.

[0032] The base cover 2 is recessed from the bottom to the top at the through-hole 202 to form a brim groove 201. 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 body 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 separating 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 through hole 202 on the base cover 2 should be larger than the diameter of the cap body 301, so that the cap body 301 on the elastic keycap 3 can move axially relative to the base cover 2 at the through hole 202 when pressed; the cap brim 302 and the cap body 301 are provided with an annular transition groove 305 with a circular arc cross-section at the top of the junction. The annular transition groove 305 can form an avoidance space to avoid the elastic keycap 3 from interfering with the bottom edge of the through hole 202 when it is released and rebounds, thereby ensuring that the elastic keycap 3 rebounds smoothly, reducing scratches and correspondingly extending the service life of the elastic keycap 3.

[0033] A force-applying portion 304 is provided at the center of the bottom surface of the cap body 301. The force-applying portion 304 is a conical protrusion whose diameter gradually decreases from top to bottom. Since the conical protrusion itself has anti-lateral force performance in the horizontal direction, it can resist the horizontal force to a certain extent, so that when the elastic keycap 3 is pressed, the conical protrusion can abut the force-bearing portion of the elastic coupling member in the vertical direction to avoid tilting and sideways, ensuring that the force when pressing the elastic keycap 3 is vertically transmitted to the elastic coupling member, thereby increasing the elastic deformation speed of the elastic coupling member, shortening the switching time between the two coupling states, and thereby improving the dual-circuit switching sensitivity of the touch switch.

[0034] A limiting flange 101 is provided on the top surface of the switch base 1. The limiting flange 101 can be embedded in the bottom surface of the sealing portion 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 radial position of the elastic keycap 3 and prevent the elastic keycap 3 from moving radially when the base cover 2 and the switch base 1 are connected to each other, thereby ensuring that the force-applying portion 304 of the elastic keycap 3 and the force-receiving portion of the elastic keycap 3 can be in vertical force contact when the elastic keycap 3 is pressed.

[0035] The elastic coupling member is a circular disc 11 whose diameter gradually increases from the top to the bottom. The circular disc 11 is made of an elastic conductive material, such as copper. The middle part of the top of the circular disc 11 is a force-bearing part. When the elastic keycap 3 is pressed, the force-bearing part can contact the force-applying part 304 of the elastic keycap 3 so as to receive the force applied to it by the elastic keycap 3. The circular disc 11 bends downward from the force-bearing part to form an upwardly protruding arc-shaped side wall and serves as a coupling part. When the force-bearing part receives the force, the coupling part can be elastically deformed 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 through the support member in the switch base 1.

[0036] The circular disc 11 has three coupling positions on the coupling portion. 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 a first coupling position and a second coupling position located at the bottom end of the circular disc 11, and a third coupling position located near the bottom edge of the circular disc 11. The first coupling position corresponds to the coupling of the main input terminal 4, the second coupling position corresponds to the coupling of the first loop terminal 5, and the third coupling position corresponds to the coupling of the second loop terminal 6.

[0037] In the first coupling state, the supporting member is used to couple the coupling portion of the circular disc 11 to the main input terminal 4 at the first coupling position, couple to the first loop terminal 5 at the second coupling position, and decouple from the second loop terminal 6 at the third coupling position; in the second coupling state, the supporting member is used to keep the coupling portion of the circular disc 11 coupled to the main input terminal 4 at the first coupling position, decouple from the first loop terminal 5 at the second coupling position, and couple to the second loop terminal 6 at the third coupling position.

[0038] The light-transmitting hole 7 is opened 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 in the circular disc 11 through the light-transmitting hole 7. Therefore, 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.

[0039] The main input terminal 4 and the two loop terminals are both made of conductive metal material and include an integrally formed connecting portion and a contact portion. The connecting portion is embedded in the switch base 1 , and the contact portion is exposed outside the switch base 1 .

[0040] 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 seat 1, and a first pin 402 exposed outside the switch seat 1; the first contact 401 and the first pin 402 constitute the contact part of the first terminal; the first contact 401 is used to couple the coupling part of the circular disc 11, and the first pin 402 is used to connect the PCB board.

[0041] The first circuit terminal 5 is provided with a second contact 501 exposed on the bottom wall of the accommodating 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 with the coupling portion of the circular disc 11, and the second pin 502 is used to connect to the PCB board.

[0042] The second circuit terminal 6 is provided with a third contact 601 exposed on the bottom wall of the accommodating 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 with the coupling portion of the circular disc 11, and the third pin 602 is used to connect to the PCB board.

[0043] The switch base 1 is overmolded with the main input terminal 4 and the two loop terminals. After overmolding, the first contact 401 on the main input terminal 4 and the second contact 501 on the first loop terminal 5 can be opposite to the bottom end of the circular disc 11, and the third contact 601 on the second loop terminal 6 can be opposite to the position near the bottom end of the circular disc 11.

[0044] 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.

[0045] Since the coupling portion of the circular disc 11 is an upwardly protruding arc-shaped side wall, the third coupling position on the coupling portion is not in 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 in the same horizontal plane, and the third coupling position is higher than the first coupling position and the second coupling position, so that the first contact 401 and the second contact 501 are coupled to the coupling portion of the circular disc 11 before the third contact 601, and then when the first contact 401 and the second contact 501 are coupled to the coupling portion of the circular disc 11, the third contact 601 can remain decoupled from the coupling portion of the circular disc 11 without contact, thereby achieving the first coupling state.

[0046] 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 is provided with corresponding pin fitting grooves 102 on the bottom surface to facilitate the insertion of the bent pins, thereby reducing the overall size of the touch switch.

[0047] 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 third pins 602 on two 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 welding points at the bottom of the touch switch to facilitate welding and fixing the touch switch to the PCB board, ensuring uniform force and improving firmness. At the same time, the gap between the touch switch and the PCB board after welding is reduced, which helps to reduce space occupation.

[0048] The support member includes a first support block 12 and a second support block 13 arranged 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 top ends of the two support blocks are support ends.

[0049] 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 end of the circular disc 11 and forms a first fulcrum at the support; the coupling part of the circular disc 11 is coupled with the first contact 401 at the first coupling position and forms a second fulcrum at the coupling; the coupling part of the circular disc 11 is coupled with the second contact 501 at the second coupling position and forms a third fulcrum at the coupling; the three fulcrums are arranged in a triangular shape 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 is 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 of ​​the coupling part with the circular disc 11 and further improve the stability of the circular disc 11.

[0050] The second support block 13 is a right triangle 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 a downward inclined surface.

[0051] When the coupling state is switched, by pressing the elastic keycap 3, the circular disc 11 is squeezed and elastically deformed, and the circular disc 11 is coupled to the third contact 601 at the third coupling position. The top end of the first support block 12 supports the bottom end of the circular disc 11; the top end of the second support block 13 supports the inner side of the arc-shaped side wall of the circular disc 11. By utilizing the principle of a seesaw, the top end of the second support block 13 serves as a fulcrum, the force-bearing portion of the circular disc 11 is squeezed, and the arc-shaped side wall corresponding to the force-bearing portion and the top end of the second support block 13 bends downward. The inclined surface of the second support block 13 forms an escape space for the arc-shaped side wall of this part to bend downward; the arc-shaped side wall corresponding to the second coupling position of the circular disc 11 and the top end of the second support block 13 tilts upward, so that the circular disc 11 is decoupled from the second contact 501 at the second coupling position; since no support member is provided near the first contact 401, the circular disc 11 remains coupled to the first contact 401 at the first coupling position, thereby completing the switching of the second coupling state.

[0052] The use of the support member in this embodiment can shorten the coupling or decoupling stroke between the elastic coupling member and the terminal, reduce the switching time of the coupling state, and improve the sensitivity of the touch switch; during the switching process, the coupling portion of the circular disc 11 always remains coupled with the contact on one of the terminals, and only needs to decouple or couple the contact on the other terminal during switching. Compared with the prior art, the coupling state switching can be completed without simultaneously coupling or decoupling the contacts on the two terminals, thereby improving the reliability of the touch switch; and in this embodiment, there is no need to set an elastic reset member, and the reset can be completed by relying on the elastic force of the elastic keycap 3 and the circular disc 11 itself, which significantly reduces the overall thickness of the touch switch and is conducive to miniaturization.

[0053] It should be noted that, depending on actual conditions, the first support block 12 and the second support block 13 in this embodiment can also be replaced by other shape structures suitable 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.

[0054] The switch base 1 is provided with a lamp groove 103 in the middle of the bottom wall of the accommodating chamber 104, and the lamp groove 103 contains an LED light source; in this embodiment, the LED light source is a SMD LED lamp 14, and the SMD LED lamp 14 is respectively provided with fourth pins 1401 at the positive and negative poles. The fourth pins 1401 extend out of the switch base 1, bend downward and fit into the bottom surface of the switch base 1, and the switch base 1 is provided with corresponding pin fitting grooves 102 on the bottom surface to facilitate the insertion of the bent pins, thereby reducing the overall size of the touch switch; when the touch switch is installed, the fourth pins 1401 are soldered to the PCB board so that the positive and negative poles of the SMD LED lamp 14 are connected to the light source circuit to conduct light. The LED light source is not controlled by the touch switch in this embodiment, but by the light source circuit to which it is connected. For this reason, the LED light source is connected to the light source circuit and is in a normally open state. The touch switch is only used to switch between two functional circuits on the PCB board other than the light source circuit.

[0055] It should be noted that the four pins in this embodiment are SMT patch pin structures. According to actual needs, other pin structures suitable for connecting to PCB boards in the prior art may also be adopted, for example: Figure 11 DIP pinout shown or Figure 12 Angle side press style shown.

[0056] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention, and the implementation methods of the present invention are not limited thereto. All other modifications, replacements or changes made to the above structures of the present invention based on the above contents of the present invention, in accordance with common technical knowledge and customary means in this field, without departing from the above basic technical ideas of the present invention, should fall within the scope of protection of the present invention.

Claims

1. A waterproof dual-circuit tact switch with light, comprising a switch housing with an internal accommodating chamber, wherein the switch housing is provided with an elastic keycap, an elastic coupling member, a conductive terminal group, and an LED light source in order from top to bottom; characterized in that: The top end of the elastic keycap extends out of the switch housing, and the bottom end is provided with a force-applying portion for contacting the force-bearing portion on the elastic coupling member; a support member is also provided in the switch housing, and the supporting end of the support member contacts and cooperates with the coupling portion formed around the force-bearing portion, so that when the elastic keycap is pressed, the elastic deformation of the elastic coupling member drives the coupling portion of the elastic coupling member and the elastic terminal group to switch the coupling state.

2. The waterproof dual-circuit touch switch with 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 portion 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 portion of the elastic coupling member is coupled to the main output terminal and the first loop terminal, and decoupled from the second loop terminal; The second coupling state is that the coupling portion of the elastic coupling member is coupled to the main output terminal and the second loop terminal, and is decoupled from the first loop terminal.

3. The waterproof dual-circuit touch switch with light according to claim 2, characterized in that: The main input terminal is provided with a first contact, the first loop terminal is provided with a second contact, and the second loop terminal is provided with a third contact; The elastic coupling member forms a first coupling position corresponding to the first contact, a second coupling position corresponding to the second contact, and a third coupling position corresponding to the third contact on the coupling portion. The first coupling position and the second coupling position are located at the bottom end of the coupling portion, and the third coupling position is higher than the first coupling position and the second coupling position.

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

5. The waterproof dual-circuit touch switch with light according to claim 4, characterized in that: The second supporting block forms a sharp corner at the top end and forms an inclined surface on the side facing away from the side wall of the accommodating chamber; When the force-bearing portion of the elastic coupling member is squeezed, the coupling portion remains coupled with the first contact at the first coupling position, the coupling portion tilts upward and decouples from the second contact at the second coupling position, and the coupling portion couples with the third contact at the third coupling position.

6. The waterproof dual-circuit touch switch with light according to claim 2, characterized in that: The elastic coupling part is a circular disc, and the middle of the top of the circular disc is the force-bearing part. The circular disc bends downward and extends from the force-bearing part to form an upwardly protruding arc-shaped side wall and serves as the coupling part; the circular disc is provided with a light-transmitting hole in the middle of the top, and the bright light generated by the LED light source passes through the light-transmitting hole through the circular disc and shines on the elastic keycap and outward.

7. The waterproof dual-circuit tact switch with light according to any one of claims 2 to 6, characterized in that: 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.

8. The waterproof dual-circuit tact switch with light according to claim 7, characterized in that: The switch housing includes a switch base and a base 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 is provided with corresponding pin fitting grooves on the bottom surface.

9. The waterproof dual-circuit tact switch with light according to claim 8, characterized in that: The elastic keycap includes a cap body and a brim 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 is provided with corresponding through-holes; the brim is formed with a sealing portion at the bottom end, and when the switch seat and the seat cover are connected to each other, the bottom surface of the sealing portion is tightly fitted with the top surface of the switch seat, and the top surface of the sealing portion is tightly fitted with the bottom surface of the seat cover.

10. The waterproof dual-circuit touch switch with light according to claim 9, characterized in that: An annular transition groove is provided at the top of the joint between the cap brim and the cap body, and the annular transition groove can form an escape space so that the elastic keycap does not interfere with the bottom edge of the perforation when it is released and rebounds.

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