A dual-circuit dual-speed push-button switch with an indicator light

Abstract

This utility model discloses a dual-circuit dual-speed push-button switch with an integrated light, comprising a switch housing with an internal mounting chamber, a keycap movably disposed at the opening of the switch housing, a key shaft with its top end connected to the keycap disposed in the mounting chamber, and an LED light source located at the bottom end of the key shaft; an elastic coupling member is disposed on the outer side of the key shaft, and three conductive terminal groups are disposed on the side wall of the mounting chamber; the key shaft can move downward along the axial direction when the keycap is pressed, driving the elastic coupling member to perform two-stage coupling in the vertical direction between the three conductive terminal groups; this utility model can perform two-stage coupling in the same direction with the built-in LED light source, improving coupling continuity and reducing the lateral area, thereby facilitating the miniaturization of the push-button switch.

Description

Technical Field

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

[0002] Currently, conventional switches correspond to one circuit function. When two circuit functions are required, two switches need to be installed, which increases the space occupied and is not conducive to installation on a smaller PCB board.

[0003] Chinese patent CN202220277041.5 discloses a high-life dual-speed push-button switch, including a housing and a button disposed on the upper part of the housing. The housing is hollow, and a shaft is disposed inside the housing. A spring is disposed on the outer surface of the shaft. A connecting plate is disposed at the lower end of the housing. The connecting plate is disposed on the connecting plate. Four springs are disposed inside the housing. The four springs are respectively connected to the four pins. The four springs include two first springs symmetrically disposed inside the shaft and two second springs disposed outside the shaft. A partition plate is disposed between the two first springs. The two second springs are a vertical spring and a curved spring, respectively.

[0004] In the aforementioned patent, although the same button can be used to achieve two different circuit functions, saving the number of switches and reducing space occupation, two of the springs are set inside the shaft core, occupying the internal space of the shaft core, making it impossible to install a light source. The other two springs are set outside the shaft core, and one is a vertical spring and the other is a curved spring, which causes the shaft core to form two couplings inside and outside, increasing the lateral area of ​​the button switch, which is not conducive to miniaturization. Moreover, the two couplings are not in the same direction, and there is a connection error between the two couplings, which reduces the coupling continuity and affects the switching accuracy of the circuit function. Utility Model Content

[0005] The purpose of this invention is to provide an illuminated dual-circuit dual-speed push button switch. This illuminated dual-circuit dual-speed push button switch can couple two segments in the same direction with a built-in LED light source, improving coupling continuity and reducing lateral area, thereby facilitating the miniaturization of the push button switch.

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

[0007] A dual-circuit dual-speed push-button switch with an LED includes a switch housing with an internal mounting chamber. A keycap is movably mounted on the switch housing at its opening. A key shaft with its top end connected to the keycap is mounted in the mounting chamber, and an LED light source is located at the bottom end of the key shaft. An elastic coupling member is mounted on the outer side of the key shaft, and three conductive terminal groups are mounted on the side wall of the mounting chamber. When the keycap is pressed, the key shaft can move downward along the axial direction, causing the elastic coupling member to couple vertically between the three conductive terminal groups in two stages.

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

[0009] Furthermore, an elastic reset member is provided inside the key shaft, and the bottom end of the elastic reset member extends out of the key shaft and connects to the bottom cavity wall of the mounting chamber; under the elastic force of the elastic reset member, an active space is formed between the bottom end of the key shaft and the bottom cavity wall of the mounting chamber, which allows the key shaft to move downward when the key cap is pressed.

[0010] Furthermore, the mounting chamber has a guide groove on its side wall; the keycap has an extension at its bottom end, and the extension has a locking block at its end; when the keycap is connected to the top of the key shaft, the extension on the keycap extends into the mounting chamber from the opening of the switch housing, so that the locking block on the connection part slides into the guide groove.

[0011] Furthermore, the top surface of the key shaft is provided with a connecting part, and a limiting block is provided on the outside of the connecting part; the keycap is provided with a limiting groove on the inside of the annular sidewall, and the limiting groove and the limiting block cooperate with each other to limit the keycap to the connecting part on the key shaft, and restrict the keycap from rotating around the axis relative to the key shaft after connection.

[0012] Furthermore, the key shaft is provided with a support portion on its outer side, which is used to limit the key shaft to the central axis of the mounting chamber, so that a coupling gap is formed between the outer wall of the key shaft and the side wall of the mounting chamber. The coupling gap is used for the elastic coupling element to perform two-stage coupling between the three conductive terminal groups.

[0013] Furthermore, two elastic coupling elements are provided, respectively disposed on both sides of the key shaft; each of the three conductive terminal groups includes an input terminal and an output terminal, the input terminal is disposed on the inner wall of the mounting chamber on the side opposite to one of the elastic coupling elements, and the output terminal is disposed on the inner wall of the mounting chamber on the other side opposite to the other elastic coupling element; the top of the output terminal is the coupling end, and the bottom ends of the input terminal and the output terminal extend out of the bottom surface of the switch housing and form pins.

[0014] Furthermore, both of the elastic coupling members include a connecting piece connecting the side of the key shaft, and a coupling piece disposed on the connecting piece. The coupling piece is inclined toward the side wall of the mounting chamber and forms an angle with the connecting piece, so that the contacts disposed on the coupling piece can make conductive contact with the adjacent conductive terminal group.

[0015] Furthermore, the included angle between the coupling piece and the connecting piece ranges from 95° to 120°.

[0016] Furthermore, the mounting chamber is provided with an elastic clamp on the bottom wall of the cavity. The elastic clamp includes two clamping arms and two base plates at the bottom ends of the two clamping arms. The two clamping arms are bent inward and form an angle with the base plates. The two clamping arms form a clamping opening between the ends of the two clamping arms away from the base plates for clamping the bottom end of the key shaft.

[0017] Furthermore, the clamping arm forms a locking portion at the end away from the substrate; the outer wall surface of the key shaft is provided with a stepped portion at the bottom end, the stepped portion has two levels, and the step surface of the stepped portion is an inclined upward wedge-shaped surface; when the key shaft moves downward along the axial direction, the locking portion on the clamping arm can slide into or out of the stepped portion along the step surface.

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

[0019] This invention forms a segmented coupling structure by setting an elastic coupling member on the outside of the key shaft and setting three conductive terminal groups with successively decreasing coupling end heights on the side wall of the mounting chamber. This allows two coupling segments to be formed on the side of the key shaft in the vertical direction, making full use of the longitudinal space of the switch housing, making the internal structure of the push-button switch more compact, reducing the lateral area, and achieving miniaturization of the push-button switch with a built-in LED light source. Furthermore, the two coupling segments are connected to each other in the same vertical direction, improving coupling continuity, increasing the switching accuracy of the two circuit functions, and avoiding connection errors between the two coupling segments caused by separate coupling in different vertical directions. 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 the structure of the dual-circuit dual-speed push-button switch with an indicator light in Embodiment 1;

[0022] Figure 2 This is a disassembly and assembly diagram of the dual-circuit dual-speed push-button switch with an indicator light in Example 1;

[0023] Figure 3 This is a schematic diagram of the bottom structure of the switch housing in Embodiment 1;

[0024] Figure 4 This is a schematic diagram of the top structure of the switch housing in Embodiment 1;

[0025] Figure 5 This is a schematic diagram of the elastic clip in Example 1;

[0026] Figure 6 This is a schematic diagram of the bottom structure of the key shaft in Example 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 keycap structure in Example 1;

[0029] Figure 9 This is a schematic diagram of the structure of the illuminated dual-circuit dual-speed push-button switch after removing the switch housing in Example 1;

[0030] Figure 10 This is a cross-sectional view of the dual-circuit dual-speed push-button switch with an indicator light in Example 1;

[0031] Figure 11 for Figure 10 A magnified view of part A;

[0032] Figure 12 This is a schematic diagram of the bottom structure of the dual-circuit dual-speed push-button switch with LED in Embodiment 2;

[0033] Figure 13 This is a schematic diagram of the structure of the illuminated dual-circuit dual-speed push-button switch after the switch housing has been removed in Example 3.

[0034] The markings on the attached diagram are as follows: 1-Switch housing, 101-Terminal mounting part, 2-Key shaft, 201-Connecting part, 202-Limiting block, 203-Supporting part, 204-Coupled mounting part, 205-First-level step part, 206-Second-level step part, 207-Light transmission hole, 3-Keycap, 301-Extension part, 302-Limiting groove, 4-LED light source, 5-Card block, 6-Guide groove, 7-Inlet, 8-Connecting foot, 801-Snap-on part, 9-Long connecting piece, 10-First coupling piece, 11-Second coupling piece, 12-Third coupling piece, 13-First conductive terminal group, 14-Second conductive terminal group, 15-Third conductive terminal group, 16-Spring, 17-Elastic clip, 1701-Locking part, 18-LED lamp pin, 19-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. Example 1

[0036] See Figures 1 to 11 This embodiment relates to an illuminated dual-circuit dual-speed push button switch, including an insulated switch housing 1, a key shaft 2 that is axially movable and disposed within the switch housing 1, a key cap 3 disposed at the top of the key shaft 2, and an LED light source 4 located at the bottom of the key shaft 2; the switch housing 1 has a bottom wall and an annular side wall; the key cap 3 has a top wall and an annular side wall.

[0037] The switch housing 1 has an internal mounting chamber for accommodating the key shaft 2 and the LED light source 4. The switch housing 1 has an opening that communicates with the mounting chamber, so that the key shaft 2 and the LED light source 4 can be installed in the mounting chamber. The keycap 3 is movably disposed at the top opening of the switch housing 1 and connected to the top end of the key shaft 2. When the keycap 3 is pressed, the top end of the key shaft 2 is subjected to force, so that the key shaft 2 can move axially downward relative to the switch housing 1 in the mounting chamber. The key shaft 2 is provided with an elastic reset member so that when the keycap 3 is released, the key shaft 2 can move axially upward to return to the initial position. When the key shaft 2 is in the initial position, a space is formed between the bottom end of the key shaft 2 and the bottom wall of the mounting chamber, allowing the key shaft 2 to move downward.

[0038] The key shaft 2 is provided with an elastic coupling element on its outer side, and the mounting chamber is provided with three conductive terminal groups on its side wall. When the key shaft 2 moves downward, it drives the elastic coupling element to couple segmentally between the three conductive terminal groups in the vertical direction, forming a coupling structure with two coupling segments to realize two different circuit functions. Two adjacent conductive terminal groups constitute a coupling segment.

[0039] A light-transmitting channel is formed inside the key shaft 2 so that the light generated by the LED light source 4 can pass through the key shaft 2 and shine on the keycap 3 and then shine outward.

[0040] Specifically, the switch housing 1 is a hollow cylindrical structure, and the mounting chamber inside the switch housing 1 is a cavity with a circular axial cross-section. The mounting chamber forms a shell opening on the top surface of the switch housing 1. The keycap 3 is movably disposed at the shell opening and connected to the top of the key shaft 2. The diameter of the shell opening of the switch housing 1 is larger than the outer diameter of the keycap 3, so that a gap is formed between the outer peripheral wall of the keycap 3 and the inner wall at the shell opening, so that the keycap 3 can move axially when pressed or released, avoiding contact and friction between the outer peripheral wall of the keycap 3 and the inner wall at the shell opening, which would cause the keycap 3 to jam, thereby improving the sensitivity and reliability of the key switch.

[0041] The keycap 3 has at least two extensions 301 at the bottom of its annular sidewall, and the extensions 301 are evenly spaced along the circumference of the keycap 3. When the keycap 3 is connected to the top of the key shaft 2, the extensions 301 on the keycap 3 extend into the mounting chamber from the shell opening. The extensions 301 on the keycap 3 have a locking block 5 at their ends. The mounting chamber has at least two guide grooves 6 on its sidewall, and the guide grooves 6 are evenly spaced along the circumference of the mounting chamber and slide in cooperation with the locking blocks 5 on the keycap 3. The locking blocks 5 on the keycap 3 are guided to slide between the first and second positions according to a preset path through the guide grooves 6, so as to limit the axial movement of the keycap 3 and limit the rotation of the keycap 3 around the axis.

[0042] In this embodiment, the locking block 5 is a right-angled triangle with a wider top and a narrower bottom. The locking block 5 protrudes from the outer surface of the extension 301 of the keycap 3. The top of the locking block 5 has a flat stop surface, and the bottom of the locking block 5 has an inclined wedge-shaped surface. When the extension 301 on the keycap 3 extends into the mounting cavity, the wedge-shaped surface on the locking block 5 contacts the edge of the shell opening, forming a force perpendicular to the axial direction on the wedge-shaped surface, which drives the extension 301 to retract inward, so that the locking block 5 can enter the mounting cavity and slide with the guide groove 6.

[0043] In this embodiment, the guide groove 6 is an elongated groove structure. The preset moving path formed by the guide groove 6 is straight and parallel to the axial direction. The top end of the guide groove 6 extends to the mounting chamber near the housing opening, and the bottom end of the guide groove 6 extends to the bottom wall of the mounting chamber. In this embodiment, the first position is the top end of the guide groove 6, and the second position is the bottom end of the guide groove 6. When the keycap 3 is pressed, the slider slides from the first position to the second position to guide the keycap 3 to move downward along the axial direction. When the keycap 3 is released, the slider slides from the second position to the first position to guide the keycap 3 to move upward along the axial direction. When the slider is in the first position, the stop surface at the top of the slider fits against the groove wall at the top of the guide groove 6 to limit the moving height of the keycap 3 when it is released, and to prevent the keycap 3 from detaching from the switch housing 1 at the housing opening.

[0044] It should be noted that the depth of the guide groove 6 should be greater than the length of the protruding extension 301 of the locking block 5, so as to ensure that the locking block 5 can be fully engaged in the guide groove 6 and to prevent the locking block 5 from disengaging from the guide groove 6 during the sliding process.

[0045] The switch housing 1 has at least two inlet ports 7 at the housing opening. The inlet ports 7 and the guide grooves 6 are arranged axially in a one-to-one correspondence. The top ends of the inlet ports 7 and the guide grooves 6 are not interconnected, and the bottom of the inlet ports 7 forms a downward-sloping inlet surface. The extension 301 on the keycap 3 is positioned and inserted into the mounting cavity through the cooperation of the inlet ports 7 and the locking block 5, so that the locking block 5 can cooperate with the guide groove 6. When the inlet ports 7 and the locking block 5 are in cooperation, the wedge-shaped surface of the locking block 5 is in contact with the inlet surface of the inlet ports 7 and slides along the inlet surface. It should be noted that an appropriate distance should be set between the top ends of the inlet ports 7 and the guide grooves 6 so that the locking block 5 can quickly cooperate with the guide groove 6, and avoid the locking block 5 from shifting position during movement due to excessive distance, which would affect the cooperation with the guide groove 6.

[0046] The switch housing 1 has a connecting foot 8 on its bottom surface, which is used to connect to the PCB board. The bottom end of the connecting foot 8 has a latching part 801, which is used to engage with the pin hole pre-set on the PCB board to fix the push button switch on the PCB board. In this embodiment, the latching part 801 is a triangular hook with a pointed bottom and a wide top. Depending on the actual situation, other shapes of latching parts 801 can also be used instead.

[0047] The key shaft 2 is a columnar block structure. The top surface of the key shaft 2 is provided with a connecting part 201, which is used to connect the keycap 3. The connecting part 201 is a circular boss, which fits into the inner cavity of the keycap 3. Two limiting blocks 202 are symmetrically arranged on the outer side of the circular boss, and two limiting grooves 302 are symmetrically arranged on the inner side of the annular sidewall of the keycap 3. The limiting grooves 302 are connected to the bottom surface of the annular sidewall. The limiting blocks 202 and the limiting grooves 302 are matched one-to-one to restrict the keycap 3 from rotating around the axis relative to the key shaft 2.

[0048] The key shaft 2 has four support portions 203 on its outer side, which are evenly spaced around the circumference of the key shaft 2. When the key shaft 2 is movably installed in the switch housing 1, the support portions 203 on the key shaft 2 are in contact with the side wall of the mounting chamber, forming a radial support force around the key shaft 2, so that the key shaft 2 is radially limited to the central axis of the mounting chamber, and a coupling gap is formed between the outer wall of the key shaft 2 and the side wall of the mounting chamber. The two sections are coupled through a coupling structure at the coupling gap. In this embodiment, all four support portions 203 are vertical flanges, and the height of the flanges is the same as the height of the key shaft 2.

[0049] The key shaft 2 has coupling element mounting portions 204 on opposite sides, which are used to mount elastic coupling elements. The side wall of the mounting chamber has a terminal mounting portion 101 at a position opposite to the coupling element mounting portions 204 on the key shaft 2, which is used to mount conductive terminal groups. When the key cap 3 is pressed, the key shaft 2 is driven to move downward along the axial direction, which drives the elastic coupling element to move downward, and completes two-stage coupling with the conductive terminal group at the coupling gap.

[0050] Two elastic coupling elements are provided, namely a first elastic coupling element and a second elastic coupling element, both made of conductive elastic material, such as copper. The first elastic coupling element is located on one side of the coupling mounting part of the key shaft 2, and the second elastic coupling element is located on the other side of the coupling mounting part of the key shaft 2. The two elastic coupling elements include an elongated connecting piece 9 and three coupling pieces disposed on the connecting piece. The three coupling pieces are arranged at intervals along the length direction of the connecting piece and are located on the same side of the width direction of the elongated connecting piece 9. The coupling pieces are inclined towards the side cavity wall of the mounting chamber and form an angle with the elongated connecting piece 9, with the angle ranging from 95° to 120°, so that the coupling pieces can couple with the conductive terminal group. The coupling pieces are provided with contacts on the coupling surface that can make conductive contact with the conductive terminal group. During installation, the connecting plate is encased in the key shaft 2, and the coupling pieces are exposed outside the key shaft 2. For ease of description, the three coupling pieces are named the first coupling piece 10, the second coupling piece 11, and the third coupling piece 12, respectively. The first coupling piece 10, the second coupling piece 11, and the third coupling piece 12 are arranged sequentially along the length direction of the elongated connecting piece 9.

[0051] For ease of description, the three conductive terminal groups are respectively named the first conductive terminal group 13, the second conductive terminal group 14, and the third conductive terminal group 15. Each conductive terminal group includes an elongated input terminal and an elongated output terminal. The input terminal of the three conductive terminal groups is located in one of the terminal mounting portions 101 on the mounting chamber, and the output terminal of the three conductive terminal groups is located in the other terminal mounting portion 101 on the mounting chamber. The top of the input terminal and the output terminal are coupling ends, and the bottom ends of the input terminal and the output terminal extend out of the bottom surface of the switch housing 1 and form pins that are inserted into the PCB board. The height of the coupling ends of the input terminals in the first conductive terminal group 13, the second conductive terminal group 14, and the third conductive terminal group 15 decreases sequentially along the width direction of the keycap 3, that is, the coupling end of the input terminal in the first conductive terminal group 13 is the highest, and the coupling end of the input terminal in the third conductive terminal group 15 is the lowest; the height of the coupling ends of the output terminals in the first conductive terminal group 13, the second conductive terminal group 14, and the third conductive terminal group 15 decreases sequentially along the width direction of the keycap 3, that is, the coupling end of the output terminal in the first conductive terminal group 13 is the highest, and the coupling end of the output terminal in the third conductive terminal group 15 is the lowest.

[0052] In practice:

[0053] In the free state, the key shaft 2 is in the first position (i.e., the initial position). The first coupling piece 10 in the first elastic coupling member is coupled to the coupling end of the input terminal in the first conductive terminal group 13, and the first coupling piece 10 in the second elastic coupling member is coupled to the coupling end of the output terminal in the first conductive terminal group 13.

[0054] Pressing the keycap 3 causes it to move axially downward to the secondary position. In the first elastic coupling member, the first coupling piece 10 is coupled to the coupling end of the input terminal in the first conductive terminal group 13, and the second coupling piece 11 in the first elastic coupling member is coupled to the coupling end of the input terminal in the second conductive terminal group 14. In the second elastic coupling member, the first coupling piece 10 is coupled to the coupling end of the output terminal in the first conductive terminal group 13, and the second coupling piece 11 in the second elastic coupling member is coupled to the coupling end of the output terminal in the second conductive terminal group 14.

[0055] Continue pressing keycap 3. Keycap 3 moves downward along the axial direction to the third position. In the first elastic coupling member, the first coupling piece 10 is coupled to the coupling end of the input terminal in the first conductive terminal group 13; the second coupling piece 11 in the first elastic coupling member is coupled to the coupling end of the input terminal in the second conductive terminal group 14; and the third coupling piece 12 in the first elastic coupling member is coupled to the coupling end of the input terminal in the third conductive terminal group 15. In the second elastic coupling member, the first coupling piece 10 is coupled to the coupling end of the output terminal in the first conductive terminal group 13; the second coupling piece 11 in the second elastic coupling member is coupled to the coupling end of the output terminal in the second conductive terminal group 14; and the third coupling piece 12 in the second elastic coupling member is coupled to the coupling end of the output terminal in the third conductive terminal group 15. That is to say, at this time, all three coupling pieces in the first elastic coupling member are coupled to the input terminals in the three conductive terminal groups, and all three coupling pieces in the second elastic coupling member are coupled to the input terminals in the three conductive terminal groups.

[0056] In this embodiment, the two coupling segments are the first coupling segment and the second coupling segment. The first coupling segment is when the key shaft 2 moves from the initial position to the secondary position, and the second coupling segment is when the key shaft 2 moves from the secondary position to the tertiary position. Each coupling segment corresponds to a loop function.

[0057] The segmented coupling structure adopted in this embodiment can form two coupling segments in the vertical direction on the side of the key shaft 2, making full use of the longitudinal space of the switch housing 1, making the internal structure of the push button switch more compact and reducing the lateral area. With the built-in LED light source 4, the push button switch can be miniaturized. Furthermore, the two coupling segments are connected to each other in the same vertical direction, improving the coupling continuity, increasing the switching accuracy of the two circuit functions, and avoiding the connection error between the two coupling segments caused by coupling separately in different vertical directions.

[0058] The elastic reset element is a spring 16. A spring cavity is formed inside the keycap 3, and an opening is formed at the bottom end to connect to the spring cavity. The spring 16 is housed in the spring 16 through this opening. The top end of the spring 16 abuts against the top wall of the spring cavity, and the bottom end of the spring 16 abuts against the bottom wall of the mounting chamber. When the keycap 3 is in the initial position, the spring 16 is in an extended state. When the keycap 3 is pressed, the key shaft 2 moves downward, and the spring 16 is compressed to form an elastic force. When the keycap 3 is released, the key shaft 2 moves upward and returns to the initial position under the elastic force of the spring 16.

[0059] The mounting chamber has an elastic clamp 17 on the bottom wall. The elastic clamp 17 includes two clamping arms and two base plates at the bottom ends of the clamping arms. The two clamping arms are bent inward to form an angle with the base plates, with the angle ranging from 40° to 65°. The two clamping arms form a clamping opening between the ends away from the base plates to facilitate clamping the bottom end of the key shaft 2. The clamping arms are bent outward at the ends away from the base plates to form a locking part 1701. The outer wall surface of the key shaft 2 has a stepped part at the bottom end. The stepped part has two levels, namely a first-level stepped part 205 and a second-level stepped part 206 arranged sequentially from bottom to top along the axial direction of the key shaft 2. The step surfaces of the two stepped parts are inclined upward wedge-shaped surfaces.

[0060] When the key shaft 2 is in the initial position, the elastic clamp 17 is clamped at the first-stage step portion 205 of the key shaft 2, and the locking part 1701 on the clamp arm is engaged with the step stop at the first-stage step portion 205.

[0061] When the key shaft 2 moves from the initial position to the secondary position, the locking part 1701 on the clamping arm slides along the step surface of the primary step 205 into the secondary step 206, and the locking part 1701 on the clamping arm engages with the step at the secondary step 206.

[0062] When the key shaft 2 moves from the secondary position to the tertiary position, the locking part 1701 on the clamping arm slides along the stepped surface of the secondary step part 206 to the outer wall of the key shaft 2.

[0063] In this embodiment, the elastic clamp 17 can be set to radially limit the key shaft 2, thereby reducing the shaking when the key shaft 2 moves up and down; at the same time, since the locking part 1701 on the clamp arm will vibrate and change the sliding speed when sliding in and out of each step, the user can feel a clear jolt when pressing, so as to remind the user to press the button switch in place.

[0064] The elastic clip 17 has a clearance hole at the center of the substrate so that the LED light source 4 can be installed on the bottom wall of the mounting chamber.

[0065] The mounting chamber has a light groove in the middle of the bottom cavity wall. The LED light source 4 is installed in the light groove and is fitted into the spring cavity inside the keycap 3. The spring 16 is fitted onto the LED light source 4. The spring cavity of the key shaft 2 serves as a light transmission channel. A light transmission hole 207 communicating with the elastic cavity is opened on the connecting part 201 of the key shaft 2. In this embodiment, the LED light source 4 is an LED lamp. The LED lamp has LED lamp pins 18 at the positive and negative poles respectively. The LED lamp pins 18 extend out of the bottom surface of the switch housing 1. Corresponding through holes are provided on the bottom wall of the switch housing 1 for the LED lamp pins 18 to pass through.

[0066] When the push-button switch is installed, the LED pin 18 is soldered to the PCB board so that the positive and negative terminals of the LED can be connected to the light source circuit to conduct light. The LED light source 4 is not controlled by the push-button switch in this embodiment, but by the light source circuit to which it is connected. Therefore, the LED light source 4 is connected to the light source circuit in a normally open state, and the push-button switch is only used to switch between the two circuit functions. Example 2

[0067] See Figure 12 The difference between this second embodiment and the first embodiment is that the switch housing 1 in this embodiment has a positioning post 19 at the bottom. The positioning post 19 can cooperate with the positioning hole preset on the PCB board to position and install the button switch on the PCB board, so that the LED pin 18 on the positive terminal of the LED lamp is connected to the input terminal of the light source circuit, and the LED pin 18 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.

[0068] Specifically, in this embodiment, the positioning post 19 is a cylindrical structure located near the bottom center of the switch housing 1. The end of the positioning post 19 is chamfered to facilitate insertion into the positioning hole pre-set on the PCB board, thereby improving installation efficiency. Example 3

[0069] See Figure 13 The difference between this third embodiment and the first embodiment is that the coupling end of the input terminal in the second conductive terminal group 14 is the highest, the coupling end of the input terminal in the third conductive terminal group 15 is the lowest, and the coupling end of the input terminal in the first conductive terminal group 13 is located vertically between the coupling ends of the input terminals of the second conductive terminal group 14 and the third conductive terminal group 15.

[0070] The coupling end of the output terminal in the second conductive terminal group 14 is the highest, the coupling end of the output terminal in the third conductive terminal group 15 is the lowest, and the coupling end of the output terminal in the first conductive terminal group 13 is located vertically between the coupling ends of the output terminals of the second conductive terminal group 14 and the third conductive terminal group 15.

[0071] The input and output terminals in the first conductive terminal group 13 are provided with clearance grooves on their coupling ends. The clearance grooves are vertical grooves, and the top wall of the clearance grooves is flush with the top surface of the coupling ends of the input and output terminals in the third conductive terminal group 15.

[0072] In practice:

[0073] In the free state, the key shaft 2 is in the first position (i.e., the initial position), the second coupling piece 11 in the first elastic coupling member is coupled to the coupling end of the input terminal in the second conductive terminal group 14, and the second coupling piece 11 in the second elastic coupling member is coupled to the coupling end of the output terminal in the second conductive terminal group 14.

[0074] Pressing the keycap 3 causes it to move axially downwards to the secondary position. The second coupling piece 11 in the first elastic coupling member couples with the coupling end of the input terminal in the second conductive terminal group 14, and the first coupling piece 10 in the first elastic coupling member couples with the coupling end of the input terminal in the first conductive terminal group 13. The second coupling piece 11 in the first elastic coupling member couples with the coupling end of the output terminal in the second conductive terminal group 14, and the first coupling piece 10 in the first elastic coupling member couples with the coupling end of the output terminal in the first conductive terminal group 13. At this point, one of the circuits is activated to achieve a circuit function.

[0075] Continue pressing keycap 3. Keycap 3 moves downward along the axis to the third position. The second coupling piece 11 in the first elastic coupling member couples with the coupling end of the input terminal in the second conductive terminal group 14. The first coupling piece 10 in the first elastic coupling member slides into the clearance groove on the input terminal in the first conductive terminal group 13 to complete decoupling. The third coupling piece 12 in the first elastic coupling member couples with the coupling end of the input terminal in the third conductive terminal group 15. The second coupling piece 11 in the first elastic coupling member couples with the coupling end of the output terminal in the second conductive terminal group 14. The first coupling piece 10 in the first elastic coupling member slides into the clearance groove on the output terminal in the first conductive terminal group 13 to complete decoupling. The third coupling piece 12 in the first elastic coupling member couples with the coupling end of the output terminal in the third conductive terminal group 15. At this time, the original circuit is disconnected and another circuit is connected to realize another circuit function, thereby realizing the switching of the two circuit functions.

[0076] It should be noted that, depending on actual needs, the height positions of the coupling ends of the input and output terminals in the three conductive terminal groups in this embodiment can be adjusted accordingly, which can also realize the switching of the two circuit functions; as detailed below:

[0077] In this embodiment, the coupling end of the input terminal in the second conductive terminal group 14 is the highest, the coupling end of the input terminal in the first conductive terminal group 13 is the lowest, and the coupling end of the input terminal in the third conductive terminal group 15 is located vertically between the coupling ends of the input terminals of the second conductive terminal group 14 and the first conductive terminal group 13.

[0078] The coupling end of the output terminal in the second conductive terminal group 14 is the highest, the coupling end of the output terminal in the first conductive terminal group 13 is the lowest, and the coupling end of the output terminal in the third conductive terminal group 15 is located vertically between the coupling ends of the output terminals of the second conductive terminal group 14 and the first conductive terminal group 13.

[0079] Correspondingly, the input terminals and output terminals in the third conductive terminal group 15 are provided with clearance grooves on their coupling ends. The clearance grooves are vertical grooves, and the top wall of the clearance grooves is flush with the top surface of the coupling ends of the input terminals and output terminals in the first conductive terminal group 13.

[0080] 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 double-circuit double-speed push button switch with light, comprising a switch housing with an installation chamber formed inside, a key cap movably arranged at a housing opening of the switch housing, a key shaft with a top end connected to the key cap arranged in the installation chamber, and an LED light source arranged at a bottom end of the key shaft; characterized in that, The key shaft is provided with an elastic coupling member on the outer side, and the mounting chamber is provided with three conductive terminal groups on the side cavity wall; the key shaft can move downward along the axial direction when the key cap is pressed, and drive the elastic coupling member to make two-stage coupling between the three conductive terminal groups along the vertical direction.

2. The dual circuit dual speed toggle switch with light of claim 1, wherein, The key shaft is provided with an elastic reset member, and the bottom end of the elastic reset member extends out of the key shaft and is connected to the bottom cavity wall of the mounting chamber; under the elastic force of the elastic reset member, an active space is formed between the bottom end of the key shaft and the bottom cavity wall of the mounting chamber, so that the key shaft can move downward when the key cap is pressed.

3. The dual circuit dual speed toggle switch with light of claim 2, wherein, The mounting chamber is provided with a guide groove on the side cavity wall; the key cap is provided with an extension at the bottom end, and the extension is provided with a clamping block at the end; when the key cap is connected to the top end of the key shaft, the extension on the key cap extends into the mounting chamber from the shell opening of the switch shell, so that the clamping block on the connecting part is in sliding fit with the guide groove.

4. The dual circuit dual speed toggle switch with light of claim 3, wherein, The top surface of the key shaft is provided with a connecting part, and a limiting block is arranged on the outer side of the connecting part; the key cap is provided with a limiting groove on the inner side of the annular side wall, and the limiting groove and the limiting block are matched with each other, so that the key cap is limited to connect the connecting part on the key shaft, and the key cap is limited to rotate relative to the key shaft around the axis after connection.

5. The dual circuit dual speed toggle switch with light of claim 4, wherein, The key shaft is provided with a support part on the outer side, and the support part is used to limit the key shaft on the central axis of the mounting chamber, so that a coupling gap is formed between the outer side wall of the key shaft and the side cavity wall of the mounting chamber, and the coupling gap is used for the elastic coupling member to make two-stage coupling between the three conductive terminal groups.

6. The dual circuit dual speed toggle switch with light of claim 5, wherein, The elastic coupling member is provided with two, which are arranged on the two sides of the key shaft respectively; the three conductive terminal groups each include an input terminal and an output terminal, the input terminal is arranged on the inner cavity wall on the side of the mounting chamber opposite to one of the elastic coupling members, and the output terminal is arranged on the inner cavity wall on the other side of the mounting chamber opposite to the other elastic coupling member; the top end of the output terminal is a coupling end, and the bottom ends of the input terminal and the output terminal extend out of the bottom surface of the switch shell and form pins.

7. The dual circuit dual speed toggle switch with light of claim 6, wherein, The two elastic coupling members each include a connecting piece connecting the side of the key shaft, and a coupling piece arranged on the connecting piece, the coupling piece is inclined to the side cavity wall of the mounting chamber and has an included angle with the connecting piece, so that the contact arranged on the coupling piece can be in conductive contact with the adjacent conductive terminal group.

8. The dual circuit dual speed toggle switch with light of claim 7, wherein, The included angle between the coupling piece and the connecting piece ranges from 95° to 120°.

9. The dual circuit dual speed toggle switch with light of claim 8, wherein, The mounting chamber is provided with an elastic clamp on the bottom cavity wall, and the elastic clamp includes two clamp arms and a base plate at the bottom ends of the two clamp arms, the two clamp arms are bent inward and form an included angle with the base plate, and the two clamp arms form a clamping opening between the ends away from the base plate for clamping the bottom end of the key shaft.

10. The dual circuit dual speed toggle switch with light of claim 9, wherein, The clamp arm forms a clamping part at the end away from the base plate; the outer wall surface of the key shaft is provided with a stepped part at the bottom end, the stepped part has two levels, and the step surface of the stepped part is an inclined upward wedge surface; when the key shaft moves downward along the axial direction, the clamping part on the clamp arm can slide into or out of the stepped part along the step surface.

Images