Double-loop double-speed key switch with lamp

Abstract

The double-loop double-speed key switch with the lamp comprises a switch shell, a mounting cavity is formed in the switch shell, a key cap is movably arranged at a shell opening of the switch shell, a key shaft and an LED light source are arranged in the mounting cavity, the top end of the key shaft is connected with the key cap, and the LED light source is located at the bottom end of the key shaft. An elastic coupling piece is arranged on the outer side of the key shaft; three conductive terminal groups are arranged on the side cavity wall of the mounting cavity; the key shaft can move downwards in the axial direction when the key cap is pressed, and the elastic coupling piece is driven to conduct two-section coupling among the three conductive terminal sets in the vertical direction. According to the key switch, two-section coupling can be carried out in the same direction under the condition that the LED light source is arranged in the key switch, the coupling continuity is improved, the transverse area is reduced, and miniaturization of the key switch is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of dual-speed push button switches, in particular to a dual-circuit dual-speed push button switch with an indicator light. Background Art

[0002] Currently, a conventional switch realizes one circuit function. When two circuit functions need to be realized, two switches need to be installed. The two switches increase the occupied space and are not conducive to installation on a smaller PCB board.

[0003] The Chinese patent with patent number CN202220277041.5 discloses a high-life dual-speed push button switch, including a shell and a button arranged on the upper part of the shell. The shell is hollow, and an axis core is arranged inside the shell. A spring is arranged on the outer surface of the axis core. A connecting disk is arranged at the lower end of the shell, and four pins are arranged on the connecting disk. Four spring clips are arranged in the shell, and the four spring clips are respectively connected to the four pins. The four spring clips include two first spring clips symmetrically arranged on the inner side of the axis core and two second spring clips arranged outside the axis core. A partition plate is arranged between the two first spring clips, and the two second spring clips are respectively a vertical spring clip and a curved spring clip.

[0004] In the above patent, although the same button can be used to realize two different circuit functions, the number of switches is saved and the occupied space is reduced; however, since two of the springs are arranged in the shaft core, occupying the internal space of the shaft core, the light source cannot be installed, and the other two springs are arranged outside the shaft core, and are a vertical spring and a curved spring, resulting in the shaft core forming two sections of coupling inside and outside respectively, increasing the lateral area of ​​the button switch, which is not conducive to miniaturization, and the two sections of coupling are not carried out in the same direction, there is a connection error between the two sections of coupling, which reduces the coupling continuity and affects the switching accuracy of the circuit function. Summary of the Invention

[0005] The object of the present invention is to provide a dual-circuit dual-speed push button switch with an indicator light. The dual-circuit dual-speed push button switch with an indicator light can perform two-stage coupling in the same direction with a built-in LED light source, thereby improving coupling consistency and reducing the lateral area, thereby facilitating the miniaturization of the push button switch.

[0006] The purpose of the present invention is achieved through the following technical solutions: A dual-circuit, dual-speed pushbutton switch with an indicator light comprises a switch housing with an installation chamber formed therein, a keycap movably provided at a housing opening of the switch housing, a key shaft with its top end connected to the keycap, and an LED light source located at the bottom end of the key shaft provided in the installation chamber; an elastic coupling member is provided on the outer side of the key shaft, and three conductive terminal groups are provided on the side cavity wall of the installation chamber; the key shaft can move downward in the axial direction when the keycap is pressed, driving the elastic coupling member to perform two-stage coupling between the three conductive terminal groups in the vertical direction.

[0007] On the basis of the above technical solution, the present invention can be improved as follows: Furthermore, an elastic return member is provided in the key shaft, and the bottom end of the elastic return member extends out of the key shaft and is connected to the bottom cavity wall of the installation chamber; under the action of the elastic force of the elastic return member, an active space is formed between the bottom end of the key shaft and the bottom cavity wall of the installation chamber, which allows the key shaft to move downward when the keycap is pressed.

[0008] Furthermore, the installation chamber is provided with a guide groove on the side cavity wall; the keycap is provided with an extension portion at the bottom end, and the extension portion is provided with a clamping block at the end; when the keycap is connected to the top end of the key shaft, the extension portion on the keycap extends into the installation chamber from the shell opening of the switch housing, so that the clamping block on the connecting portion slides in conjunction with the guide groove.

[0009] Furthermore, a connecting portion is provided on the top surface of the key shaft, and a limiting block is provided on the outside of the connecting portion; a limiting groove is provided on the inner side of the annular side wall of the key cap, and the limiting groove and the limiting block cooperate with each other to limit the key cap to be connected to the connecting portion on the key shaft, and after connection, the key cap is limited from rotating around the axis relative to the key shaft.

[0010] Furthermore, the key shaft is provided with a support portion on the outside, and the support portion is used to limit the key shaft to the central axis of the installation chamber so that a coupling gap is formed between the outer wall of the key shaft and the side cavity wall of the installation chamber, and the coupling gap is used for the elastic coupling to perform two-stage coupling between the three conductive terminal groups.

[0011] Furthermore, two elastic coupling members are provided, respectively provided on both sides of the key shaft; the three conductive terminal groups each include an input terminal and an output terminal, the input terminal is provided on the inner cavity wall on the side of the installation chamber opposite to one of the elastic coupling members, and the output terminal is provided on the inner cavity wall on the other side of the installation chamber opposite to the other elastic coupling member; the top end 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.

[0012] Furthermore, the two elastic coupling members each include a connecting plate connected to the side of the key shaft, and a coupling plate arranged on the connecting plate, the coupling plate is inclined toward the side cavity wall of the installation chamber and forms an angle with the connecting plate, so that the contacts arranged on the coupling plate can be in conductive contact with the adjacent conductive terminal group.

[0013] Furthermore, the angle between the coupling plate and the connecting plate ranges from 95° to 120°.

[0014] Furthermore, the installation chamber is provided with an elastic clip on the bottom cavity wall, the elastic clip includes two clamping arms and two substrates at the bottom ends of the two clamping arms, the two clamping arms are bent inward and form an angle with the substrate, and the two clamping arms form a clamping opening for clamping the bottom end of the key shaft between the ends away from the substrate.

[0015] Furthermore, the clamping arm forms a locking portion at one 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 stepped surface of the stepped portion is a wedge-shaped surface inclined upward; when the key shaft moves axially downward, the locking portion on the clamping arm can slide into or out of the stepped portion along the step surface.

[0016] Compared with the prior art, the technology of the present invention has the following advantages: The present invention forms a segmented coupling structure by arranging an elastic coupling member on the outer side of the key shaft and arranging three conductive terminal groups with coupling end heights decreasing in sequence on the side wall of the installation chamber. Two coupling sections can be formed in the vertical direction beside the key shaft, which fully utilizes the longitudinal space of the switch housing, makes the internal structure of the key switch more compact, reduces the lateral area, and realizes the miniaturization of the key switch when an LED light source is built in. The two coupling sections are connected to each other in the same vertical direction, which improves the coupling continuity, increases the switching accuracy of the two circuit functions, and avoids the connection error between the two coupling sections caused by coupling in different vertical directions. 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 a schematic structural diagram of a dual-circuit dual-speed push button switch with light in Example 1; Figure 2 This is a disassembly diagram of the dual-circuit dual-speed push button switch with light in Example 1; Figure 3 This is a schematic diagram of the bottom structure of the switch housing in Example 1; Figure 4 This is a schematic diagram of the top structure of the switch housing in Example 1; Figure 5 Schematic diagram of the structure of the elastic clip in Example 1; Figure 6Schematic diagram of the bottom structure of the key shaft in Example 1; Figure 7 Schematic diagram of the top structure of the key shaft in Example 1; Figure 8 Schematic diagram of the structure of the key cap in Example 1; Figure 9 This is a structural diagram of the illuminated dual-circuit dual-speed push button switch after the switch housing is removed in Example 1; Figure 10 2. It is a cross-sectional view of the dual-circuit dual-speed push button switch with light in Example 1; Figure 11 for Figure 10 A local enlarged view of point A; Figure 12 This is a schematic diagram of the bottom structure of the dual-circuit dual-speed push button switch with light in Example 2; Figure 13 This is a structural diagram of the illuminated dual-circuit dual-speed push button switch after the switch housing is removed in Example 3.

[0018] Markings on the accompanying drawings: 1-switch housing, 101-terminal mounting portion, 2-key shaft, 201-connecting portion, 202-limiting block, 203-supporting portion, 204-coupling member mounting portion, 205-first step portion, 206-second step portion, 207-light-transmitting hole, 3-key cap, 301-extension portion, 302-limiting groove, 4-LED light source, 5-block, 6-guide groove, 7-introduction port, 8-connecting foot, 801-snapping portion, 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-stopping portion, 18-LED lamp pin, 19-positioning column. 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. Example 1

[0020] See also Figures 1 to 11 This embodiment relates to a dual-circuit dual-speed push button switch with light, comprising an insulating switch housing 1, a key shaft 2 axially movable in the switch housing 1, a key cap 3 arranged at the top end of the key shaft 2, and an LED light source 4 located at the bottom end 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.

[0021] An installation chamber for accommodating the key shaft 2 and the LED light source 4 is formed inside the switch housing 1, and a shell opening connected to the installation chamber is provided on the switch housing 1, so that the key shaft 2 and the LED light source 4 can be installed in the installation chamber; the key cap 3 is movably provided at the top shell opening of the switch housing 1 and connected to the top end of the key shaft 2; when the key cap 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 installation chamber; an elastic reset part is provided in the key shaft 2 so that the key shaft 2 can move axially upward to return to its initial position when the key cap 3 is released; when the key shaft 2 is in the initial position, a movable space for the key shaft 2 to move downward is formed between the bottom end of the key shaft 2 and the bottom cavity wall of the installation chamber.

[0022] An elastic coupling is provided on the outside of the key shaft 2, and three conductive terminal groups are provided on the side wall of the installation chamber; when the key shaft 2 moves downward, it drives the elastic coupling to couple in sections between the three conductive terminal groups in the vertical direction, forming a coupling structure with two coupling sections to respectively realize two loop functions, and two adjacent conductive terminal groups constitute a coupling section.

[0023] A light-transmitting channel is formed inside the key shaft 2 so that the bright light generated by the LED light source 4 can pass through the key shaft 2 and illuminate the key cap 3 to be transmitted outward.

[0024] Specifically, the switch housing 1 is a hollow cylindrical structure, and the installation chamber inside the switch housing 1 is a cavity with a circular axial cross-section. The installation chamber forms a shell opening on the top surface of the switch housing 1, and the keycap 3 is movably arranged at the shell opening and connected to the top end of the key shaft 2; the shell opening diameter 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 the outer peripheral wall of the keycap 3 and the inner wall of the shell opening from contacting and rubbing with each other, causing the keycap 3 to get stuck, thereby improving the sensitivity and reliability of the key switch.

[0025] The keycap 3 is provided with at least two extensions 301 at the bottom end of the annular side wall, and the extensions 301 are arranged at equal intervals along the circumference of the keycap 3; when the keycap 3 is connected to the top end of the key shaft 2, the extension 301 on the keycap 3 extends into the installation chamber from the shell opening; the extension 301 on the keycap 3 is provided with a clamping block 5 at the end; the installation chamber is provided with at least two guide grooves 6 on the side cavity wall, and the guide grooves 6 are arranged at equal intervals along the circumference of the installation chamber, and are slidably matched with the clamping blocks 5 on the keycap 3; the guide grooves 6 are used to guide the clamping blocks 5 on the keycap 3 to slide between the first position and the second position according to a preset path, so as to limit the axial movement of the keycap 3 and limit the rotation of the keycap 3 around the axis.

[0026] In this embodiment, the block 5 has a right-angled triangle cross-section with a wide top and a pointed bottom. The block 5 protrudes from the outer surface of the extension portion 301 of the keycap 3. The top of the block 5 has a flat stop surface, and the bottom of the block 5 has an inclined wedge-shaped surface. When the extension portion 301 on the keycap 3 extends into the installation chamber, the wedge-shaped surface on the block 5 contacts the edge of the shell opening, forming a force perpendicular to the axial direction on the wedge surface, driving the extension portion 301 to converge inward, so that the block 5 can enter the installation chamber and slide into the guide groove 6.

[0027] In this embodiment, the guide groove 6 is an elongated groove structure, and the preset moving path formed by the guide groove 6 is linear and parallel to the axial direction. The top end of the guide groove 6 extends to the installation chamber near the shell opening, and the bottom end of the guide groove 6 extends to the bottom cavity wall of the installation 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 in 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 in the axial direction; when the slider is in the first position, the stop surface at the top of the slider fits into the groove wall at the top of the guide groove 6 to limit the moving height of the keycap 3 when it is released, thereby preventing the keycap 3 from detaching from the switch housing 1 from the shell opening.

[0028] It should be noted that the depth of the guide groove 6 should be greater than the length of the outer surface of the protruding extension portion 301 of the block 5 to ensure that the block 5 can fully fit into the guide groove 6 and prevent the block 5 from escaping from the guide groove 6 during the sliding process.

[0029] The switch housing 1 is provided with at least two inlet ports 7 at the shell opening, and the inlet ports 7 are arranged in one-to-one correspondence with the guide groove 6 in the axial direction. The top ends of the inlet ports 7 and the guide groove 6 are not connected to each other, and the bottom of the inlet ports 7 forms an inlet surface inclined downward; through the cooperation between the inlet ports 7 and the block 5, the extension portion 301 on the keycap 3 is positioned and extended into the installation chamber, so that the block 5 can cooperate with the guide groove 6; when the inlet ports 7 and the block 5 cooperate, the wedge surface of the block 5 is in contact with the inlet surface of the inlet port 7 and slides along the inlet surface; it should be noted that an appropriate spacing should be set between the inlet ports 7 and the top ends of the guide groove 6 so that the block 5 can quickly cooperate in the guide groove 6, and avoid the position offset of the block 5 during movement due to excessive spacing, which affects the cooperation with the guide groove 6.

[0030] The switch housing 1 is provided with a connecting foot 8 on the bottom surface, which is used to connect to the PCB board. The bottom end of the connecting foot 8 is formed with a snap-fit ​​portion 801, which is used to snap-fit ​​with a pin hole preset on the PCB board to securely mount the key switch on the PCB board. In this embodiment, the snap-fit ​​portion 801 is a triangular hook with a pointed bottom and a wide top. Depending on the actual situation, the snap-fit ​​portion 801 can also be replaced by a snap-fit ​​portion 801 of other shapes.

[0031] The key shaft 2 is a columnar block structure, and a connecting portion 201 is provided on the top surface of the key shaft 2, and the connecting portion 201 is used to connect the keycap 3; the connecting portion 201 is a circular boss, and the circular boss cooperates with the inner cavity of the keycap 3; the circular boss is symmetrically provided with two limit blocks 202 on the outside, and the annular side wall of the keycap 3 is symmetrically provided with two limit grooves 302 on the inside, and the limit grooves 302 are connected to the bottom surface of the annular side wall; the limit blocks 202 and the limit grooves 302 are matched one by one to limit the keycap 3 from rotating around the axis relative to the key shaft 2.

[0032] The key shaft 2 is provided with four supporting parts 203 on the outside, and the supporting parts 203 are arranged at equal intervals along the circumference of the key shaft 2; when the key shaft 2 is movably installed in the switch housing 1, the supporting parts 203 on the key shaft 2 are connected to the side cavity wall of the installation chamber, forming a radial supporting force around the key shaft 2, so that the key shaft 2 is radially limited to the central axis of the installation chamber, and a coupling gap is formed between the outer wall of the key shaft 2 and the side cavity wall of the installation chamber, and two-section coupling is completed at the coupling gap through the coupling structure; in this embodiment, the four supporting parts 203 are all vertical flanges, and the height of the flange is the same as the height of the key shaft 2.

[0033] The key shaft 2 is provided with coupling mounting parts 204 on opposite sides, and the coupling mounting parts 204 are used to install elastic coupling parts; the side cavity wall of the installation chamber is provided with terminal mounting parts 101 at a position relative to the coupling mounting parts 204 on the key shaft 2, and the terminal mounting parts 101 are used to install a conductive terminal group; when the key cap 3 is pressed, the key shaft 2 is driven to move downward in the axial direction, driving the elastic coupling part to move downward, and completing two-stage coupling with the conductive terminal group at the coupling gap.

[0034] Two elastic coupling members are provided, namely a first elastic coupling member and a second elastic coupling member, both of which are made of conductive elastic material, such as copper; the first elastic coupling member is located at a coupling mounting portion on one side of the key shaft 2, and the second elastic coupling member is located at a coupling mounting portion on the other side of the key shaft 2; the two elastic coupling members include an elongated connecting piece 9, and three coupling pieces arranged 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 toward the side cavity wall of the installation cavity and form an angle with the elongated connecting piece 9, the angle range is 95°~120°, so that the coupling pieces can be coupled with the conductive terminal group; the coupling pieces are provided with contacts on the coupling surface that can be in conductive contact with the conductive terminal group; during installation, the connecting plate is plastic-wrapped in the key shaft 2, and the coupling piece is exposed on the key shaft 2; for the convenience of description, the three coupling pieces are named as the first coupling piece 10, the second coupling piece 11 and the third coupling piece 12, respectively, and the first coupling piece 10, the second coupling piece 11 and the third coupling piece 12 are arranged in sequence along the length direction of the elongated connecting piece 9.

[0035] For ease of description, the three conductive terminal groups are named as the first conductive terminal group 13, the second conductive terminal group 14 and the third conductive terminal group 15, each conductive terminal group includes a long strip input terminal and a long strip output terminal; the input terminal of the three conductive terminal groups is located on one of the terminal mounting portions 101 on the mounting chamber, and the output terminal of the three conductive terminal groups is located on the other terminal mounting portion 101 on the mounting chamber; the top ends 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 to be plugged into the PCB board ; The coupling end heights of the input terminals in the first conductive terminal group 13, the second conductive terminal group 14 and the third conductive terminal group 15 decrease successively 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, that is, the coupling end of the input terminal in the third conductive terminal group 15 is the lowest; the coupling end heights of the output terminals in the first conductive terminal group 13, the second conductive terminal group 14 and the third conductive terminal group 15 decrease successively 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, that is, the coupling end of the output terminal in the third conductive terminal group 15 is the lowest.

[0036] When implementing: In the free state, the key shaft 2 is in the primary 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; When the keycap 3 is pressed, the keycap 3 moves axially downward to the secondary position. The first coupling piece 10 in the first elastic coupling piece 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 piece is coupled to the coupling end of the input terminal in the second conductive terminal group 14; the first coupling piece 10 in the second elastic coupling piece 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 piece is coupled to the coupling end of the output terminal in the second conductive terminal group 14; Continue to press the keycap 3, and the keycap 3 moves axially downward to the third position. The first coupling piece 10 in the first elastic coupling piece 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 piece 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 piece is coupled to the coupling end of the input terminal in the third conductive terminal group 15; the first coupling piece 10 in the second elastic coupling piece 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 piece 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 piece is coupled to the coupling end of the output terminal in the third conductive terminal group 15; that is, at this time, the three coupling pieces in the first elastic coupling piece are coupled to all the input terminals in the three conductive terminal groups, and the three coupling pieces in the second elastic coupling piece are coupled to all the input terminals in the three conductive terminal groups.

[0037] In this embodiment, the two coupling sections are the first coupling section and the second coupling section. The first coupling section is when the key shaft 2 moves from the initial position to the secondary position, and the second coupling section is when the key shaft 2 moves from the secondary position to the tertiary position. Each coupling section corresponds to realizing a loop function.

[0038] The segmented coupling structure adopted in this embodiment can form two coupling sections along the vertical direction beside the key shaft 2, making full use of the longitudinal space of the switch housing 1, making the internal structure of the key switch more compact, reducing the lateral area, and realizing the miniaturization of the key switch when the LED light source 4 is built in. The two coupling sections are connected to each other in the same vertical direction, thereby improving the coupling continuity, increasing the switching accuracy of the two circuit functions, and avoiding the connection error between the two coupling sections caused by coupling separately in different vertical directions.

[0039] The elastic return member is a spring 16. A spring cavity is formed in the keycap 3, and a cavity opening connected to the spring cavity is formed at the bottom end. The spring 16 is accommodated in the spring 16 through the cavity opening. The top end of the spring 16 abuts the top wall of the spring cavity, and the bottom end of the spring 16 abuts the bottom cavity wall of the installation 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, under the action of the elastic force of the spring 16, the key shaft 2 moves upward to restore the initial position.

[0040] An elastic clip 17 is provided on the bottom wall of the installation chamber, and the elastic clip 17 includes two clamping arms and two substrates at the bottom ends of the two clamping arms. The two clamping arms are bent inward to form an angle with the substrate, and the angle range is 40°~65°; the two clamping arms form a clamping opening between the ends away from the substrate to facilitate clamping the bottom end of the key shaft 2; the clamping arms are bent outward at the end away from the substrate to form a locking portion 1701; the outer wall surface of the key shaft 2 is provided with a stepped portion at the bottom end, and the stepped portion has two levels, namely a first-level stepped portion 205 and a second-level stepped portion 206 arranged in sequence from bottom to top along the axial direction of the key shaft 2, and the step surfaces of the two stepped portions are wedge-shaped surfaces inclined upward.

[0041] When the key shaft 2 is located at the initial position, the elastic clip 17 is clamped on the first-level stepped portion 205 of the key shaft 2 , and the stopper 1701 on the clamp arm is engaged with the step stopper on the first-level stepped portion 205 .

[0042] When the key shaft 2 moves from the initial position to the secondary position, the stopper 1701 on the clamp arm slides along the step surface of the primary step portion 205 into the secondary step portion 206, and the stopper 1701 on the clamp arm cooperates with the step stop on the secondary step portion 206; When the key shaft 2 moves from the secondary position to the third position, the locking portion 1701 on the clamp arm slides along the stepped surface of the secondary stepped portion 206 to the outer side wall of the key shaft 2 .

[0043] In this embodiment, the elastic clip 17 is provided to limit the radial position of the key shaft 2 to reduce the shaking of the key shaft 2 when it moves up and down; at the same time, since the locking portion 1701 on the clamp arm will generate vibration and change the sliding speed when sliding in and out of each step, the user can feel a clear sense of frustration when pressing, so as to remind the user to press the key switch into place.

[0044] The elastic clip 17 is provided with an escape hole at the center of the substrate so that the LED light source 4 can be mounted on the bottom wall of the mounting cavity.

[0045] The installation chamber is provided with a lamp groove in the middle of the bottom cavity wall. The LED light source 4 is installed in the lamp groove and is sleeved in the spring cavity inside the key cap 3. The spring 16 is sleeved on the LED light source 4. The spring cavity of the key shaft 2 serves as a light-transmitting channel. A light-transmitting hole 207 connected to the elastic cavity is provided 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 is respectively provided with LED lamp pins 18 at the positive and negative poles. The LED lamp pins 18 extend out of the bottom surface of the switch housing 1. The bottom wall of the switch housing 1 is correspondingly provided with a through hole for the LED lamp pins 18 to pass through.

[0046] When the push button switch is installed, the LED lamp pin 18 is welded to the PCB board so that the positive and negative poles of the LED lamp 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. For this reason, the LED light source 4 is connected to the light source circuit and is in a normally open state. The push button switch is only used to realize the switching of the two circuit functions. Example 2

[0047] See also Figure 12 The difference between the technical solution of the second embodiment and the first embodiment is that, in the present embodiment, a positioning column 19 is provided at the bottom of the switch housing 1. The positioning column 19 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 LED lamp pin 18 on the positive pole of the LED lamp corresponds to the input end of the light source circuit, and the LED lamp pin 18 on the negative pole of the LED lamp corresponds to the output end of the light source circuit, which effectively avoids the positive and negative poles of the LED lamp being connected in reverse.

[0048] Specifically, in this embodiment, the positioning column 19 is a cylindrical structure, close to the bottom center of the switch housing 1, and the end of the positioning column 19 is provided with a chamfer to facilitate insertion into the positioning hole preset on the PCB board, thereby improving installation efficiency. Example 3

[0049] See also Figure 13 The difference between the technical solution of the third embodiment and the first embodiment is that, 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 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 between the coupling ends of the input terminals of the second conductive terminal group 14 and the third conductive terminal group 15 in the vertical direction.

[0050] 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 between the coupling ends of the output terminals of the second conductive terminal group 14 and the third conductive terminal group 15 in the vertical direction.

[0051] The input terminals and output terminals in the first conductive terminal group 13 are provided with avoidance grooves on their coupling ends. The avoidance grooves are vertical grooves, and the top groove walls of the avoidance grooves are flush with the top surfaces of the coupling ends of the input terminals and output terminals in the third conductive terminal group 15 .

[0052] When implementing: In the free state, the key shaft 2 is in the primary 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; When the keycap 3 is pressed, the keycap 3 moves axially downward to the secondary position. The second coupling piece 11 in the first elastic coupling piece is coupled to 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 piece 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 piece is coupled to 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 piece is coupled to the coupling end of the output terminal in the first conductive terminal group 13. At this time, one of the circuits is connected to realize a circuit function. Continue to press the keycap 3, and the keycap 3 moves axially downward to the third position. The second coupling piece 11 in the first elastic coupling piece is coupled 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 piece slides into the avoidance 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 piece is coupled 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 piece is coupled 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 piece slides into the avoidance 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 piece is coupled with the coupling end of the output terminal in the third conductive terminal group 15. At this time, the original circuit is disconnected and the other circuit is connected to realize the function of the other circuit, thereby realizing the switching of the two circuit functions.

[0053] It should be noted that, according to actual needs, the height positions of the coupling ends of the input terminals and output terminals in the three conductive terminal groups in this embodiment can be adjusted accordingly, and the function switching of the two circuits can also be achieved; the details are as follows: 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 between the coupling ends of the input terminals of the second conductive terminal group 14 and the first conductive terminal group 13 in the vertical direction.

[0054] 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 between the coupling ends of the output terminals of the second conductive terminal group 14 and the first conductive terminal group 13 in the vertical direction.

[0055] Correspondingly, the input terminals and output terminals in the third conductive terminal group 15 are provided with avoidance grooves on the coupling ends. The avoidance grooves are vertical grooves, and the top groove walls of the avoidance grooves are flush with the top surfaces of the coupling ends of the input terminals and output terminals in the first conductive terminal group 13.

[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 dual-circuit, dual-speed pushbutton switch with an illumination, comprising a switch housing with an internal mounting chamber, a keycap movably mounted at an opening of the switch housing, a key shaft with a top end connected to the keycap disposed in the mounting chamber, and an LED light source located at a bottom end of the key shaft; characterized in that: An elastic coupling is provided on the outside of the key shaft, and three conductive terminal groups are provided on the side wall of the installation chamber; the key shaft can move downward along the axial direction when the keycap is pressed, driving the elastic coupling to perform two-section coupling between the three conductive terminal groups along the vertical direction.

2. The illuminated dual-circuit dual-speed push button switch according to claim 1, characterized in that: An elastic return member is provided in the key shaft, and the bottom end of the elastic return member extends out of the key shaft and is connected to the bottom cavity wall of the installation chamber; under the action of the elastic force of the elastic return member, an active space is formed between the bottom end of the key shaft and the bottom cavity wall of the installation chamber, which allows the key shaft to move downward when the keycap is pressed.

3. The illuminated dual-circuit dual-speed push button switch according to claim 2, characterized in that: The installation chamber is provided with a guide groove on the side cavity wall; the keycap is provided with an extension portion at the bottom end, and the extension portion is provided with a clamping block at the end; when the keycap is connected to the top end of the key shaft, the extension portion on the keycap extends into the installation chamber from the shell opening of the switch housing, so that the clamping block on the connecting portion slides in conjunction with the guide groove.

4. The illuminated dual-circuit dual-speed push button switch according to claim 3, characterized in that: A connecting portion is provided on the top surface of the key shaft, and a limiting block is provided on the outside of the connecting portion; a limiting groove is provided on the inner side of the annular side wall of the key cap, and the limiting groove and the limiting block cooperate with each other to limit the key cap to be connected to the connecting portion on the key shaft, and after connection, the key cap is limited from rotating around the axis relative to the key shaft.

5. The illuminated dual-circuit dual-speed push button switch according to claim 4, characterized in that: The key shaft is provided with a support portion on the outside, and the support portion is used to limit the key shaft to the central axis of the installation chamber so that a coupling gap is formed between the outer wall of the key shaft and the side wall of the installation chamber. The coupling gap is used for the elastic coupling member to perform two-stage coupling between the three conductive terminal groups.

6. The illuminated dual-circuit dual-speed push button switch according to claim 5, characterized in that: Two elastic coupling members are provided, one on each side of the key shaft; the three conductive terminal groups each include an input terminal and an output terminal, the input terminal being provided on the inner cavity wall on the side of the installation chamber opposite to one of the elastic coupling members, and the output terminal being provided on the inner cavity wall on the other side of the installation chamber opposite to the other elastic coupling member; the top end 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.

7. The illuminated dual-circuit dual-speed push button switch according to claim 6, characterized in that: Both of the elastic coupling parts include a connecting plate connected to the side of the key shaft, and a coupling plate arranged on the connecting plate. The coupling plate is inclined toward the side wall of the installation cavity and forms an angle with the connecting plate so that the contacts arranged on the coupling plate can be in conductive contact with the adjacent conductive terminal group.

8. The illuminated dual-circuit dual-speed push button switch according to claim 7, characterized in that: The angle between the coupling plate and the connecting plate ranges from 95° to 120°.

9. The illuminated dual-circuit dual-speed push button switch according to claim 8, characterized in that: The installation chamber is provided with an elastic clip on the bottom cavity wall, and the elastic clip includes two clamping arms and two substrates at the bottom ends of the two clamping arms. The two clamping arms are bent inward and form an angle with the substrate. The two clamping arms form a clamping opening for clamping the bottom end of the key shaft between the ends away from the substrate.

10. The illuminated dual-circuit dual-speed push button switch according to claim 9, characterized in that: The clamping arm forms a locking portion at one 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 stepped surface of the stepped portion is a wedge-shaped surface inclined upward; when the key shaft moves downward in the axial direction, the locking portion on the clamping arm can slide into or out of the stepped portion along the step surface.

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