A replaceable keycap double circuit switch with light

Abstract

The utility model discloses a replaceable keycap's take lamp double circuit switch, including the switch seat and the seat cover of interconnection, be provided with the elastic isolating plate of light -transmitting in the switch seat, and the elastic isolating plate will switch seat interior space divide and form first accommodating chamber and second accommodating chamber, be provided with LED light source in first accommodating chamber to and elastic reset piece, be provided with the light -transmitting hole on elastic reset piece, be provided with the key shaft in second accommodating chamber, and the top of key shaft extends out switch seat outside and detachably connected with the light -transmitting keycap, and the bottom of key shaft has the force application portion of abutting elastic isolating plate top, and sets up the light -transmitting mouth at the force application portion place, the coupling is provided with in the outside of key shaft, and the second accommodating chamber is provided with the conducting terminal set on the side cavity wall, and when the up and down of key shaft moves, can drive coupling and conducting terminal set coupling or separate, to two function circuit is turned on simultaneously, the utility model discloses can avoid LED light source exposure, effectively blocks the outside water mist, dust or oil stain and keeps the light -transmitting to improve the reliability of switch.

Description

Technical Field

[0001] This utility model relates to the technical field of illuminated double-circuit switches, and in particular to an illuminated double-circuit switch with replaceable keycaps. Background Technology

[0002] Tactile switches are widely used electronic devices and household appliance switches. However, during use, tactile switches inevitably come into contact with water mist, dust, or oil, which can easily lead to increased switching resistance, corrosion, and contact failure, affecting the normal use of related products and causing electrical malfunctions. In severe cases, it can even cause electrical equipment to be burned out.

[0003] Chinese patent CN200920306463.5 discloses a waterproof tactile switch with an indicator light, including a spring, a B button, an A button, and a top cover. It also includes an LED light, a waterproof sheet, a base, and multiple terminals. The spring, B button, waterproof sheet, and A button are assembled with the base and top cover from bottom to top within the base cavity. The LED light is installed inside the A button. The base and multiple terminals are integrally molded using injection molding. The base has multiple locking points, and the top cover has multiple locking slots, with the locking points and slots corresponding and engaging. The base has 2-4 positioning protrusions, and the waterproof sheet has 2-4 holes, with the positioning protrusions and holes corresponding and engaging.

[0004] Although the tactile switch in the aforementioned patent has waterproof, dustproof, and oil-proof functions, the top of button A is open, and the LED light is installed at the opening of button A, resulting in the LED light being exposed. External water mist, dust, or oil can enter button A and cover the LED light, affecting light transmission. Moreover, the LED light's lamp base is led out from the slots on both sides of button A, and external water mist, dust, or oil can also cover the lamp base, easily causing malfunctions. The tactile switch with this structure has low reliability. Utility Model Content

[0005] The purpose of this invention is to provide a dual-circuit switch with replaceable keycaps and LEDs that can prevent the LED light source from being exposed, effectively block external water mist, dust or oil from entering while maintaining light transmission, thereby improving the reliability of the switch.

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

[0007] A dual-circuit switch with replaceable keycaps and backlight includes a switch base and a cover connected to each other. The switch base contains a light-transmitting elastic partition plate that divides the internal space of the switch base into a first accommodating cavity and a second accommodating cavity. The first accommodating cavity contains an LED light source and an elastic reset member whose top abuts against the elastic partition plate. The elastic reset member has a light-transmitting hole. The second accommodating cavity contains a key shaft with an internal light-transmitting channel. The top of the key shaft extends through the cover and out of the switch base, detachably connected to a light-transmitting keycap. The bottom of the key shaft has a force-applying part that abuts against the top of the elastic partition plate, and a light-transmitting opening connecting to the light-transmitting channel is provided at the force-applying part. A coupling member is provided on the outer side of the key shaft. A conductive terminal group is provided on the side wall of the second accommodating cavity. When the key shaft moves up and down, it can drive the coupling member to couple or separate from the conductive terminal group, thereby simultaneously switching on and off two functional circuits.

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

[0009] Furthermore, the switch base has a stepped portion on its inner sidewall, the stepped portion forming a flat step surface at its top, and the edge of the elastic isolation plate overlapping the step surface of the stepped portion.

[0010] Furthermore, the elastic reset member is a circular disc with a high center and low edges, and the light-transmitting hole is opened in the center of the circular disc; a limiting part is provided at the edge of the circular disc; a limiting groove is provided on the stepped surface of the stepped part, and the limiting groove on the stepped part and the limiting part on the circular disc cooperate with each other to limit the circular disc in the first accommodating cavity, so that the top of the limited circular disc abuts the bottom end of the elastic isolation plate, and the light-transmitting hole on the circular disc is opposite to the LED light source.

[0011] Furthermore, the key shaft has a raised edge on the outer peripheral wall at its bottom end. In the free state, the top surface of the raised edge is in contact with the bottom surface of the seat cover, and the force-applying part at the bottom end of the key shaft abuts against the top of the elastic isolation plate.

[0012] Furthermore, the second accommodating cavity is provided with guide portions on two opposite side cavity walls and support portions on two other opposite side cavity walls; the key shaft is provided with guide grooves in the middle of the protrusions on opposite sides, the guide portions on the second accommodating cavity and the guide grooves on the key shaft are slidably engaged in a one-to-one correspondence, and the two support portions on the second accommodating cavity respectively support the protrusions on the other opposite sides of the key shaft.

[0013] Furthermore, two conductive terminal groups are provided, each conductive terminal group including an input terminal and an output terminal for connecting to a functional circuit; the input terminal and the output terminal are fixedly installed on the side wall of the second accommodating cavity and located on both sides of the support; two coupling members are provided, respectively arranged on opposite sides of the key shaft; when the key shaft moves downward, it drives the coupling members to couple with the adjacent input terminal and the output terminal.

[0014] Furthermore, both the input terminal and the output terminal include a contact portion exposed on the side wall of the second accommodating cavity, and a connecting portion embedded in the switch base, the connecting portion extending out of the switch base to form a pin.

[0015] Furthermore, each of the coupling elements includes a substrate portion with a protruding edge embedded in the key shaft, and two coupling portions disposed on the substrate portion; when the key shaft moves downward, the two coupling portions in each coupling element are respectively coupled to the contact portions of the adjacent input terminal and the output terminal.

[0016] Furthermore, the base portion of each of the coupling elements is an elongated sheet, and each elongated sheet extends on the same side in the width direction and bends upward to form two coupling portions, with the two coupling portions located at the two ends in the length direction of the elongated sheet respectively.

[0017] Furthermore, the first accommodating cavity has a lamp groove in the middle of the bottom cavity wall, and the lamp groove contains an LED light source. The LED light source has pins extending out of the switch base at the positive and negative terminals, respectively.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] This invention utilizes a light-transmitting elastic partition plate within a switch holder to divide the internal space into a first accommodating cavity and a second accommodating cavity. An LED light source and an elastic reset component are housed in the first accommodating cavity, with a light-transmitting hole on the elastic reset component. A key shaft with an internal light-transmitting channel is housed in the second accommodating cavity. The top of the key shaft extends out of the switch holder and is detachably connected to a keycap. A light-transmitting opening connecting the light-transmitting channel is located at the bottom of the key shaft. The light beam emitted by the LED light source passes sequentially through the elastic reset component, the elastic partition plate, and the key shaft before illuminating the keycap. Because the elastic partition plate seals the elastic reset component, the light beam illuminates the keycap. The light-transmitting holes on the reset component and the light-transmitting openings on the key shaft prevent the LED light source from being exposed, effectively blocking external water mist, dust, or oil from entering while maintaining light transmission, thereby improving the reliability of the switch. Moreover, a coupling component is set on the outside of the key shaft, and a conductive terminal group is set on the side wall of the second accommodating cavity. When the key shaft moves up and down, it can drive the coupling component to couple or separate from the conductive terminal group to simultaneously turn on and off two functional circuits. Since the coupling component and the conductive terminal group are coupled or separated on the side of the key shaft, the lateral space of the switch base can be fully utilized, reducing the overall thickness of the switch and facilitating miniaturization. Attached Figure Description

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of an illuminated dual-circuit switch with replaceable keycaps using an SMT (surface-mount, J-shaped) pin structure.

[0022] Figure 2 This is a disassembly and assembly diagram of the LED double-circuit switch with replaceable keycaps in Example 1;

[0023] Figure 3 This is a cross-sectional view of the LED double-circuit switch with replaceable keycaps in Example 1 without the backlit keycaps installed.

[0024] Figure 4 This is a schematic diagram of the structure of a double-circuit switch with a light-transmitting keycap that can be replaced after removing the switch base and cover, as shown in Example 1.

[0025] Figure 5 This is a schematic diagram of the top structure of the switch holder in Embodiment 1;

[0026] Figure 6 This is a schematic diagram of the bottom structure of the switch holder in Embodiment 1;

[0027] Figure 7 This is a schematic diagram of the top structure of the key shaft in Embodiment 1;

[0028] Figure 8 This is a schematic diagram of the bottom structure of the key shaft in Example 1;

[0029] Figure 9 This is a schematic diagram of the circular disc structure in Example 1;

[0030] Figure 10 This is a schematic diagram of the pin structure of a conductive terminal group and an LED light source in one embodiment.

[0031] Figure 11 A schematic diagram of a dual-circuit switch with replaceable keycaps and backlight without a backlit keycap, using an SMT surface mount pin structure;

[0032] Figure 12 A schematic diagram of a dual-circuit switch with replaceable keycaps and featuring a DIP pin structure when no backlit keycaps are installed;

[0033] Figure 13 This is a schematic diagram of the bottom structure of the switch holder in Embodiment 2.

[0034] The markings on the attached diagram are: 1-switch base, 101-first accommodating cavity, 102-second accommodating cavity, 102a-first side cavity wall, 102b-second side cavity wall, 102c-third side cavity wall, 102d-fourth side cavity wall, 103-riveting part, 104-stepped part, 105-limiting groove, 106-guide part, 107-support part, 108-lamp slot, 109-pin fitting groove, 2-base cover, 201-riveting hole, 202-through hole, 3-LED light source, 4-key shaft, 401-force application part, 402- 403-Guide groove, 5-Light-transmitting keycap, 6-Hook, 7-Elastic isolation plate, 8-Circular disc, 801-Light-transmitting hole, 802-Limiting part, 9-First contact part, 10-First pin, 11-Second contact part, 12-Second pin, 13-Third contact part, 14-Third pin, 15-Fourth contact part, 16-Fourth pin, 17-First substrate part, 18-First coupling part, 19-Second substrate part, 20-Second coupling part, 21-Fifth pin, 22-Sixth pin, 23-Positioning post. Detailed Implementation

[0035] 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.

[0036] Example 1

[0037] See Figures 1 to 10This embodiment relates to a dual-circuit switch with replaceable keycaps and LEDs, including a switch base 1 and a base cover 2 connected to each other, an LED light source 3 that can emit light and is disposed in the switch base 1, and an elastic reset member and a key shaft 4 arranged sequentially along the light path of the LED light source 3; the elastic reset member has a light-transmitting hole 801; the key shaft 4 has a light-transmitting channel inside; the top end of the key shaft 4 extends out of the switch base 1 and is provided with a hook 6 for connecting a light-transmitting keycap 5; the light beam emitted by the LED light source 3 passes sequentially through the light-transmitting hole 801 on the elastic reset member and the light-transmitting channel inside the key shaft 4, and then shines on the connected light-transmitting keycap 5 and shines outward.

[0038] It should be noted that the backlit keycap 5 is a conventional keycap in the prior art. The backlit keycap 5 has a slot, and the backlit keycap 5 is detachably installed on the top of the key switch 4 by the interlocking of the slot on the backlit keycap 5 and the hook 6 on the key switch 4. This interlocking connection method is a conventional detachable connection method in this technical field. Those skilled in the art can select a suitable backlit keycap 5 for installation according to actual usage needs. In this embodiment, the key switch 4 can be adapted to install the conventional backlit keycap 5 in the prior art.

[0039] The switch base 1 has an internal cavity that houses the LED light source 3, the key shaft 4, and the elastic reset member. The key shaft 4 has a force-applying part 401 at its bottom end, and a light-transmitting opening that connects to the light-transmitting channel is formed inside the force-applying part 401. In the free state, the force-applying part 401 of the key shaft 4 abuts against the top of the elastic reset member, and the light-transmitting opening on the force-applying part 401 and the light-transmitting hole 801 on the elastic reset member are axially opposite to each other, so that the light beam emitted by the LED light source 3 can pass through the elastic reset member and the key shaft 4. When the light-transmitting keycap 5 is pressed, the key shaft 4 moves axially downward relative to the switch base 1, and the elastic reset member is elastically deformed after being pressed by the force-applying part 401 of the key shaft 4, generating elastic force. When the light-transmitting keycap 5 is released, the elastic force of the elastic reset member acts on the force-applying part 401 of the key shaft 4, driving the key shaft 4 to move axially upward relative to the switch base 1 to return to its original position.

[0040] A light-transmitting elastic isolation plate 7 is provided between the elastic reset member and the force-applying part 401 of the key shaft 4. The elastic isolation plate 7 divides the internal accommodating chamber of the switch base 1 into a first accommodating chamber 101 and a second accommodating chamber 102 located above the first accommodating chamber 101. The elastic reset member and the LED light source 3 are located in the first accommodating chamber 101. The key shaft 4 is located in the second accommodating chamber 102. In the free state, the top end of the elastic reset member and the force-applying part 401 of the key shaft 4 abut against the top end and bottom end of the elastic isolation plate 7, respectively, to seal the light-transmitting opening on the force-applying part 401 and the light-transmitting hole 801 on the elastic reset member, preventing the LED light source 3 from being exposed, effectively blocking external water mist, dust or oil stains from entering and maintaining light transmission.

[0041] A coupling structure is provided between the outer side of the key shaft 4 and the side wall of the second accommodating cavity 102. The coupling structure can simultaneously conduct two functional circuits when the key shaft 4 moves downward. The coupling structure includes two coupling members provided on the outer side of the key shaft 4 and two conductive terminal groups provided on the side wall of the second accommodating cavity 102.

[0042] Specifically, the switch base 1 has a square base structure, and the top of the switch base 1 forms a base opening, through which the key shaft 4, the elastic isolation plate 7, the elastic reset member and the LED light source 3 are installed into the switch base 1. Depending on the actual situation, other base structures suitable for installing the key shaft 4, the elastic isolation plate 7, the elastic reset member and the LED light source 3 can also be used instead, such as a rectangular or cylindrical base structure. The base cover 2 is placed on the top base opening of the switch base 1.

[0043] The switch base 1 has a riveting part 103 at the top, and the cover 2 has a riveting hole 201 that is adapted to the riveting part 103. The riveting part 103 and the riveting hole 201 are riveted together to fix the switch base 1 and the cover 2 to each other.

[0044] In this embodiment, four riveting parts 103 are provided, respectively arranged at the four right angles of the switch base 1. The riveting part 103 includes an integrally formed connecting section and a riveting section. The connecting section is a cylindrical structure. The bottom end of the connecting section is connected to the top surface of the switch base 1, and the top end of the connecting section is connected to the riveting section. The riveting section is a hemispherical structure. The bottom surface of the riveting section is a flat surface, and the top surface is a spherical surface. The diameter of the riveting section is larger than the diameter of the connecting section. During riveting, the connecting section of the riveting part 103 passes through the riveting hole 201 on the socket cover 2. The bottom surface of the riveting section is in contact with the top surface of the socket cover 2, and the bottom surface of the socket cover 2 is in contact with the top surface of the switch base 1, thereby fixing the socket cover 2 to the switch base 1.

[0045] The cover 2 is a square cover structure corresponding to the seat opening of the switch seat 1. The cover 2 has a through hole 202 in the middle. The top end of the key shaft 4 extends out of the switch seat 1 through the through hole 202 to facilitate the installation of the light-transmitting keycap 5. The shape of the through hole 202 corresponds to the cross-sectional shape of the key shaft 4. The cover 2 has rivet holes 201 at four right angles that can be riveted and engaged with the riveting part 103 on the switch seat 1.

[0046] The switch base 1 has a stepped portion 104 on its inner sidewall. The edge of the elastic isolation plate 7 overlaps the stepped portion 104, and the top of the stepped portion 104 is a flat step surface. In this embodiment, the elastic isolation plate 7 is a circular plate structure made of light-transmitting elastic material. Depending on the actual situation, other plate structures of different shapes can also be used instead, such as a square plate structure. The top and bottom ends of the elastic isolation plate 7 are both flat plate surfaces. The bottom surface of the edge of the elastic isolation plate 7 is in contact with the step surface of the stepped portion 104 to support the elastic isolation plate 7 in the accommodating chamber and parallel to the bottom wall of the accommodating chamber, thereby dividing the accommodating chamber into a first accommodating chamber 101 and a second accommodating chamber 102. Since the supported elastic isolation plate 7 is close to the bottom wall of the switch base 1, the longitudinal space of the second accommodating chamber 102 is larger than the longitudinal space of the first accommodating chamber 101, so as to accommodate the key shaft 4 in the second accommodating chamber 102.

[0047] The elastic reset component is a circular disc 8 with a high center and low edges. The circular disc 8 has a light-transmitting hole 801 in the center and a limiting part 802 at the edge. The stepped part 104 in the switch base 1 has a limiting groove 105 on the stepped surface. The limiting groove 105 on the stepped part 104 and the limiting part 802 on the circular disc 8 cooperate with each other to limit the circular disc 8 in the first accommodating cavity 101. The top of the circular disc 8 after being limited abuts the bottom surface of the elastic isolation plate 7, and the light-transmitting hole 801 on the circular disc 8 is opposite to the LED light source 3 provided on the bottom cavity wall of the first accommodating cavity 101 so that the light beam emitted by the LED light source 3 can pass through the circular disc 8.

[0048] Four limiting portions 802 are provided on the circular disc 8, and the four limiting portions 802 are arranged at equal intervals around the edge of the circular disc 8; correspondingly, four limiting grooves 105 are provided on the stepped portion 104, and the limiting grooves 105 and the limiting portions 802 are matched one by one to form four force points on the outer periphery of the circular disc 8, which can provide support force to the circular disc 8 when it is compressed, thereby improving the stability of the circular disc 8 and avoiding uneven force distribution that causes the circular disc 8 to tilt and deform to one side when compressed, resulting in incomplete or no rebound.

[0049] The key shaft 4 is a hollow rectangular columnar structure. The inner cavity of the key shaft 4 serves as a light-transmitting channel. An opening connecting the key shaft 4 to the inner cavity is formed at the top end. A protruding edge 402 is provided on the outer peripheral wall of the bottom end of the key shaft 4. The protruding edge 402 is used to axially limit the key shaft 4 in the second accommodating cavity 102 to prevent the key shaft 4 from falling off the switch seat 1. In the free state, the top surface of the protruding edge 402 on the key shaft 4 is in contact with the bottom surface of the seat cover 2. The top end of the key shaft 4 extends out of the switch seat 1 through the through hole 202 through the seat cover 2. The force-applying part 401 at the bottom end of the key shaft 4 abuts against the elastic spacer. The top surface of the plate 7; the force application part 401 is a circular flange, and a circular light-transmitting hole is provided on the bottom surface of the circular flange. The light-transmitting hole axially penetrates the bottom wall of the inner cavity of the key shaft 4 so that the light beam emitted by the LED light source 3 can pass through; the bottom wall of the inner cavity of the key shaft 4 forms a chamfer at the penetration point with the diameter gradually increasing from the bottom end to the top end of the key shaft 4. Since the light beam has a certain divergence during propagation, the chamfer can reduce the interference at the edge of the light beam, thereby avoiding the generation of shadow black circles when the light beam shines on the light-transmitting keycap 5, so that the light-transmitting keycap 5 can transmit light evenly.

[0050] It should be noted that the diameter of the force-applying part 401 should be larger than the diameter of the light-transmitting hole 801 on the circular disc 8, and the diameter of the light-transmitting opening on the force-applying part 401 should be larger than the diameter of the light-transmitting hole 801 on the circular disc 8, so that the light beam emitted by the LED light source 3 can pass through.

[0051] When the keycap 5 is pressed, the key shaft 4 moves downward, the circular flange presses against the elastic isolation plate 7, the elastic isolation plate 7 bends downward, and the circular disc 8 is squeezed into a flat shape and generates elasticity; when the keycap 5 is released, under the action of elasticity, the circular disc 8 supports the elastic isolation plate 7, the elastic isolation plate 7 returns to its original flat state, and drives the key shaft 4 to move upward during the recovery process, thereby completing the reset of the key shaft 4.

[0052] The second accommodating cavity 102 has a first side cavity wall 102a, a second side cavity wall 102b, a third side cavity wall 102c, and a fourth side cavity wall 102d. The first side cavity wall 102a and the third side cavity wall 102c are opposite to each other, and the second side cavity wall 102b and the fourth side cavity wall 102d are opposite to each other. The second accommodating cavity 102 has guide portions 106 on the second side cavity wall 102b and the fourth side cavity wall 102d, and support portions 107 on the first side cavity wall 102a and the third side cavity wall 102c. Both the guide portions 106 and the support portions 107 are vertically arranged blocks.

[0053] The key shaft 4 has a guide groove 403 in the middle of the convex edges 402 on both sides. The guide groove 403 is a vertical groove and its two ends pass through the top and bottom surfaces of the convex edges 402. The two guide parts 106 on the second accommodating cavity 102 are slidably engaged with the two guide grooves 403 on the key shaft 4. The two support parts 107 on the second accommodating cavity 102 support the convex edges 402 on the other two sides of the key shaft 4, so as to radially limit the key shaft 4 in the second accommodating cavity 102, so that the light-transmitting opening of the key shaft 4 is axially aligned with the light-transmitting hole 801 of the circular disc 8, and the key shaft 4 moves axially to reduce the shaking generated during axial movement.

[0054] A first coupling space is formed between the first side cavity wall 102a and the opposite convex edge 402 on both sides of the support portion 107, and a second coupling space is formed between the third side cavity wall 102c and the opposite convex edge 402 on both sides of the support portion 107. When the key shaft 4 moves downward, one of the coupling elements and one conductive terminal group can be coupled in the first coupling space, and the other coupling element and another conductive terminal group can be coupled in the second coupling space. By coupling on the side of the key shaft 4, the lateral space of the switch base 1 can be fully utilized, the overall thickness of the switch can be reduced, and miniaturization can be achieved.

[0055] For ease of description, the two conductive terminal groups in this embodiment are respectively named the first conductive terminal group and the second conductive terminal group; the first conductive terminal group includes a first input terminal and a first output terminal for connecting to one of the functional circuits, and the second conductive terminal group includes a second input terminal and a second output terminal for connecting to the other functional circuit; the first input terminal and the first output terminal are fixedly installed on the first side cavity wall 102a of the second accommodating cavity 102 and are located on both sides of the support portion 107; the second input terminal and the second output terminal are fixedly installed on the third side cavity wall 102c of the second accommodating cavity 102 and are located on both sides of the support portion 107.

[0056] The first input terminal includes a first contact portion 9 exposed on the first side cavity wall 102a and a first connecting portion embedded in the switch base 1, the first connecting portion extending out of the switch base 1 to form a first pin 10; the first output terminal includes a second contact portion 11 exposed on the first side cavity wall 102a and a second connecting portion embedded in the switch base 1, the second connecting portion extending out of the switch base 1 to form a second pin 12; the first pin 10 and the second pin 12 are respectively connected to the input terminal and the output terminal of one of the functional circuits.

[0057] The second input terminal includes a third contact portion 13 exposed on the third side cavity wall 102c and a third connecting portion embedded in the switch base 1, the third connecting portion extending out of the switch base 1 to form a third pin 14; the second output terminal includes a fourth contact portion 15 exposed on the third side cavity wall 102c and a fourth connecting portion embedded in the switch base 1, the fourth connecting portion extending out of the switch base 1 to form a fourth pin 16; the third pin 14 and the fourth pin 16 are respectively connected to the input terminal and the output terminal of another functional circuit.

[0058] For ease of description, the two coupling components in this embodiment are respectively named the first coupling component and the second coupling component. The first coupling component includes a first substrate portion 17 embedded in the protrusion 402 opposite to the first side cavity wall 102a on the key shaft 4, and two first coupling portions 18 disposed on the first substrate portion 17. The second coupling component includes a second substrate portion 19 embedded in the protrusion 402 opposite to the second side cavity wall 102b on the key shaft 4, and two second coupling portions 20 disposed on the second substrate portion 19. When the key shaft 4 moves downward, the two first coupling portions 18 are coupled to the first contact portion 9 of the first input terminal and the second contact portion 11 of the first output terminal, respectively, and the two second coupling portions 20 are coupled to the third contact portion 13 of the second input terminal and the fourth contact portion 15 of the second output terminal, respectively, thereby simultaneously conducting two functional circuits.

[0059] The two coupling elements are made of an elastic conductive material, such as copper. The base portion of both coupling elements is an elongated sheet. Each elongated sheet extends on the same side in the width direction and bends upward to form two coupling portions. The two coupling portions are located at the two ends in the length direction of the elongated sheet. The coupling portions on the coupling elements can abut against the contact portions of the four terminals under their own elastic force. The contact portions of the four terminals are all square sheet structures, which can increase the contact area with the coupling portions on the coupling elements to improve the coupling reliability of the switch.

[0060] A lamp groove 108 is provided in the middle of the bottom cavity wall of the first accommodating cavity 101, and an LED light source 3 is placed in the lamp groove 108; in this embodiment, the LED light source 3 is a surface mount LED lamp, and the surface mount LED lamp has a fifth pin 21 and a sixth pin 22 extending out of the switch base 1 at the positive and negative terminals, respectively.

[0061] The first pin 10, the second pin 12, the third pin 14, the fourth pin 16, the fifth pin 21 and the sixth pin 22 extend to the outside of the switch base 1 and are bent to fit against the bottom surface of the switch base 1. The switch base 1 has corresponding pin fitting grooves 109 on the bottom surface to facilitate the insertion of the bent pins, thereby reducing the overall size of the switch.

[0062] During switch installation, the six pins are soldered to the PCB board. The positive and negative terminals of the surface-mount LED are connected to the light source circuit to conduct and emit light. The LED light source 3 is not controlled by the switch in this embodiment, but by the light source circuit it is connected to. Therefore, the LED light source 3 is connected to the light source circuit in a normally open state. The switch is only used to simultaneously turn on and off the two functional circuits on the PCB board other than the light source circuit.

[0063] It should be noted that the six pins in this embodiment are SMT surface mount (J-shaped bend) 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 SMT surface mount pin structure shown is or Figure 12 The DIP-type pin structure is shown.

[0064] Example 2

[0065] See Figure 13 The difference between this second embodiment and the first embodiment is that the switch base 1 in this embodiment has a positioning post 23 at the bottom. The positioning post 23 can cooperate with the positioning hole preset on the PCB board to facilitate the positioning and installation of the push button switch on the PCB board, so that the fifth pin 21 on the positive terminal of the LED lamp is connected to the input terminal of the light source circuit, and the sixth pin 22 on the negative terminal of the LED lamp is connected to the output terminal of the light source circuit, effectively avoiding the reverse connection of the positive and negative terminals of the LED lamp.

[0066] 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 two-circuit switch with replaceable keycaps and integrated lighting, comprising a switch base and a base cover connected to each other, characterized in that, The switch base is equipped with a light-transmitting elastic isolation plate, which divides the internal space of the switch base into a first accommodating cavity and a second accommodating cavity. An LED light source and an elastic reset member with its top abutting against the elastic isolation plate are provided in the first accommodating cavity. The elastic reset member has a light-transmitting hole. A key shaft with an internal light-transmitting channel is provided in the second accommodating cavity. The top of the key shaft extends through the base cover and out of the switch base, and a light-transmitting keycap is detachably connected to it. The bottom of the key shaft has a force-applying part that abuts against the top of the elastic isolation plate, and a light-transmitting opening connecting to the light-transmitting channel is provided at the force-applying part. A coupling member is provided on the outer side of the key shaft, and a conductive terminal group is provided on the side wall of the second accommodating cavity. When the key shaft moves up and down, it can drive the coupling member to couple or separate from the conductive terminal group, thereby simultaneously switching on and off two functional circuits.

2. The dual-circuit switch with replaceable keycaps and integrated lighting according to claim 1, characterized in that, The switch base has a stepped portion on its inner side wall, and the stepped portion forms a flat step surface at the top. The edge of the elastic isolation plate overlaps the step surface of the stepped portion.

3. The dual-circuit switch with replaceable keycaps and integrated lighting according to claim 2, characterized in that, The elastic reset member is a circular disc with a high center and low edges. The light-transmitting hole is opened in the center of the circular disc. A limiting part is provided at the edge of the circular disc. A limiting groove is provided on the stepped surface of the stepped part. The limiting groove on the stepped part and the limiting part on the circular disc cooperate with each other to limit the circular disc in the first accommodating cavity, so that the top of the circular disc after limiting abuts the bottom end of the elastic isolation plate, and the light-transmitting hole on the circular disc is opposite to the LED light source.

4. The dual-circuit switch with replaceable keycaps and integrated lighting according to claim 3, characterized in that, The key shaft has a raised edge on the outer peripheral wall at its bottom end. In the free state, the top surface of the raised edge is in contact with the bottom surface of the seat cover, and the force-applying part at the bottom end of the key shaft abuts against the top of the elastic isolation plate.

5. The dual-circuit switch with replaceable keycaps and integrated lighting according to claim 4, characterized in that, The second accommodating cavity has guide portions on two opposite side walls and support portions on two other opposite side walls; the key shaft has guide grooves in the middle of the protrusions on opposite sides, the guide portions on the second accommodating cavity and the guide grooves on the key shaft are slidably fitted in correspondence, and the two support portions on the second accommodating cavity support the protrusions on the other opposite sides of the key shaft respectively.

6. The dual-circuit switch with replaceable keycaps and integrated lighting according to claim 5, characterized in that, Two conductive terminal groups are provided, each conductive terminal group including an input terminal and an output terminal for connecting to a functional circuit; the input terminal and the output terminal are fixedly installed on the side wall of the second accommodating cavity and located on both sides of the support; two coupling members are provided, respectively arranged on opposite sides of the key shaft; when the key shaft moves downward, it drives the coupling members to couple with the adjacent input terminal and the output terminal.

7. The dual-circuit switch with replaceable keycaps and integrated lighting according to claim 6, characterized in that, Both the input terminal and the output terminal include a contact portion exposed on the side wall of the second accommodating cavity, and a connecting portion embedded in the switch base, the connecting portion extending out of the switch base to form a pin.

8. The dual-circuit switch with replaceable keycaps and integrated lighting according to claim 7, characterized in that, Each of the coupling elements includes a substrate portion with a protruding edge embedded in the key shaft, and two coupling portions disposed on the substrate portion; when the key shaft moves downward, the two coupling portions in each coupling element are respectively coupled to the contact portions of the adjacent input terminal and the output terminal.

9. The dual-circuit switch with replaceable keycaps and integrated lighting according to claim 8, characterized in that, Each of the coupling elements has a base portion that is an elongated sheet. Each elongated sheet extends on the same side in the width direction and bends upward to form two coupling portions. The two coupling portions are located at the two ends in the length direction of the elongated sheet, respectively.

10. The dual-circuit switch with replaceable keycaps and integrated lighting according to claim 9, characterized in that, The first accommodating cavity has a lamp groove in the middle of the bottom cavity wall, and the lamp groove contains an LED light source. The LED light source has pins extending out of the switch base at the positive and negative terminals, respectively.

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