Toggle structure of piano key switch

Abstract

The invention discloses a toggle structure of a piano key switch, which comprises a switch bracket, a circuit board and a toggle button are arranged on the switch bracket, and a first microswitch and a second microswitch are electrically connected to the circuit board; the switch further comprises a bidirectional toggle mechanism arranged on one side of the circuit board, the circuit board is transversely distributed, the bidirectional toggle mechanism comprises a first swing rod and a second swing rod which are hinged to the switch support, the first swing rod is hinged to the second swing rod, the end, away from the second swing rod, of the first swing rod is in linkage connection with a toggle button, and the toggle button is in linkage connection with the circuit board. And a first pressing part and a second pressing part which are used for triggering the first microswitch and the second microswitch are respectively arranged at the positions, corresponding to the two sides of the rotating center, of the second oscillating bar. By means of the double-swing-rod transmission mode, bidirectional operation can be achieved under the condition that a single-layer circuit board is used, the cost is greatly saved, and the space requirement is remarkably saved.

Description

Technical Field

[0001] The invention relates to the technical field of switches, and in particular to a toggle structure of a piano key switch. Background Art

[0002] For piano key switches, to achieve the function of two-way operation of the dial, the traditional structure is generally set to arrange the circuit board vertically, or to achieve it through two layers of circuit boards. When the circuit board is arranged vertically, it takes up a lot of space in the height direction; while the double-layer circuit board takes up less space, but an additional circuit board and a wiring connecting the two circuit boards are required, which is more expensive.

[0003] Therefore, the market needs to improve traditional piano key switches. Summary of the invention

[0004] The object of the present invention is to provide a toggle structure of a piano key switch. The present invention can realize bidirectional operation when using a single-layer circuit board through a double rocker transmission method, which not only greatly saves costs, but also significantly saves space requirements.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a toggle structure of a piano key switch, comprising a switch bracket, a circuit board and a toggle button are provided on the switch bracket, a first micro switch and a second micro switch are electrically connected on the circuit board; and further comprising a two-way toggle mechanism arranged on one side of the circuit board, and the circuit board is laterally distributed, the two-way toggle mechanism comprising a first swing arm and a second swing arm respectively hinged on the switch bracket, and the first swing arm is hinged to the second swing arm, an end of the first swing arm away from the second swing arm is linked to the toggle button, and the second swing arm is provided with a first pressing portion and a second pressing portion at positions on both sides of the corresponding rotation center, when the second swing arm swings around the first direction to prompt the first pressing portion to toggle the first micro switch, the second pressing portion and the second micro switch are in a separated state, and when the second swing arm swings around the second direction to prompt the second pressing portion to toggle the second micro switch, the first pressing portion and the first micro switch are in a separated state.

[0006] By adopting the above technical solution, the first swing arm and the second swing arm each have a rotation center, and rotate up and down in a seesaw-like manner. The first swing arm and the second swing arm are hinged for transmission. When the dial button is dialed up, the first swing arm drives the second swing arm to rotate, and the first pressing part on the second swing arm applies pressure to the first micro switch to trigger the function. When the dial button is dialed down, the first swing arm drives the second swing arm to reverse, and the second pressing part on the second swing arm applies pressure to the second micro switch to trigger the function. Thus, bidirectional operation is achieved when using a single-layer circuit board, eliminating the connection wiring between one circuit board and two circuit boards, greatly saving costs; at the same time, the circuit boards are distributed horizontally, and the bidirectional toggle mechanism is set on one side of the circuit board. The bidirectional toggle mechanism can be arranged in a 15mm Z-direction space, saving about 9mm of space compared to the double-layer circuit board solution, significantly saving space requirements.

[0007] The present invention is further configured such that the first pressing portion and the second pressing portion are staggered front to back.

[0008] By adopting the above technical solution, the first swing rod and the second swing rod do not interfere with each other during the swinging process, and the installation space is saved.

[0009] The present invention is further configured such that the protrusion on the first pressing portion is provided with a first pressure head for triggering the first micro switch, and the protrusion on the second pressing portion is provided with a second pressure head for triggering the second micro switch.

[0010] By adopting the above technical solution, the contact area between the pressing part and the micro switch is reduced, and the cooperation is more precise.

[0011] The present invention is further configured as follows: the switch bracket is provided with two first hinge seats and two second hinge seats, the first hinge seat is provided with a first axial hole, and the first swing arm is provided with first rotating shafts matching the first axial holes of the corresponding first hinge seats on both sides, the second hinge seat is provided with a second axial hole, and the second swing arm is provided with second rotating shafts matching the second axial holes of the corresponding second hinge seats on both sides.

[0012] By adopting the above technical solution, the hinged installation of the first swing arm and the second swing arm can be realized, the installation structure is simple and reliable, and the disassembly and assembly are very convenient.

[0013] The present invention is further configured such that a first reinforcing rib extending in the vertical direction is disposed on a side portion of the first articulated seat, and a second reinforcing rib extending in the vertical direction is disposed on a side portion of the second articulated seat.

[0014] By adopting the above technical solution, the strength of the first hinge seat and the second hinge seat can be improved, making them less likely to break during frequent movement of the rotating shaft, thereby increasing the service life of the switch.

[0015] The present invention is further configured such that an end of the first swing rod away from the toggle button is provided with an inwardly concave opening groove, and an end of the second swing rod close to the toggle button is provided with a follower convex portion, and the follower convex portion is rotatably arranged in the opening groove.

[0016] By adopting the above technical solution, the transmission between the first swing rod and the second swing rod is realized through the fork structure, the structure is simple, the assembly is convenient, and the transmission is stable and reliable.

[0017] The present invention is further configured such that a columnar fitting portion is provided at the end of the follower protrusion, and a cross-sectional diameter of the columnar fitting portion is greater than a thickness of the second rocker arm.

[0018] By adopting the above technical solution, the coordination is smoother, the space for clearance is larger, and interference is less likely to occur.

[0019] The present invention is further configured such that the switch bracket includes a bottom plate and a side baffle, the dial button and the two-way dial mechanism are respectively arranged on both sides of the side baffle, and the side baffle is provided with a passage for the first rocker rod to pass through and be linked to the dial button.

[0020] By adopting the above technical solution, the two-way toggle mechanism is arranged on the inner side of the side baffle of the switch bracket, and the toggle button is arranged on the outer side of the side baffle of the switch bracket, which is not only easy to operate but also more beautiful in appearance.

[0021] The present invention is further configured as follows: the cylindrical matching portion is provided with a cylindrical hole axially therethrough, the outer side of the cylindrical matching portion is provided with a plurality of side holes connected with the cylindrical hole circumferentially, an elastic member is inserted in the cylindrical hole, the elastic member comprises two cylindrical bases fitted with the inner walls of the cylindrical holes and a plurality of elastic compensation arms arranged between the two cylindrical bases and the same number as the side holes, the plurality of elastic compensation arms are distributed in a circular arc between the two cylindrical bases, the elastic compensation arms are provided with at least two elastic protrusions protruding outward, the elastic compensation arms are passed through the corresponding side holes, and the elastic protrusions on the elastic compensation arms extend out of the side holes and abut against the inner wall of the opening groove; a locking screw is threadedly connected to the positions at the two ends of the cylindrical hole of the cylindrical matching portion respectively, the inner end of the screw portion of the locking screw is fitted with the corresponding end of the cylindrical base, and a hexagonal socket is provided on the screw head of the locking screw.

[0022] By adopting the above technical solution, due to the deviation of the part size chain and the influence of the processing technology, the first rocker arm opening groove and the second rocker arm cylindrical matching part often have a large interference or a large gap in the matching size, which causes the button to get stuck or shake a lot. An elastic part is arranged on the cylindrical matching part of the second rocker arm to make it press against the opening groove of the first rocker arm, which can effectively eliminate the above technical problems. Moreover, its position can be determined by the cylindrical hole and the side hole, and then locked by two locking screws. The installation structure is stable and reliable, and it is very convenient to disassemble and assemble.

[0023] The present invention is further configured such that the second swing arm comprises a left rod body and a right rod body, a rotation groove is provided in the middle of the left rod body, a rotation convex portion matched with the rotation groove is provided in the middle of the right rod body, a spring cavity is provided through-through at both ends of the rotation convex portion, a pressure-stabilizing hole connected with the spring cavity is provided on the outer surface of the rotation convex portion, a preload spring is provided in the spring cavity, and an inner multi-tooth groove is provided at each end of the spring cavity, an outer multi-tooth groove having the same cross-section as the inner multi-tooth groove is provided at each end of the first swing arm corresponding to the positions of the two ends of the rotation groove, the inner multi-tooth groove and the corresponding outer multi-tooth groove are combined to form a clutch cavity, guide holes connected with the corresponding outer multi-tooth groove are provided through-through at each end of the first swing arm, a limited position shaft sleeve is inserted in the guide hole, and the second rotating shaft comprises A multi-toothed portion located in the middle and a rotating convex portion and a guide convex portion axially arranged at both ends of the multi-toothed portion, the multi-toothed portion is meshed and connected in the clutch cavity, and the axial length of the inner multi-tooth groove is greater than the axial length of the multi-toothed portion, the rotating convex portion passes through the limiting sleeve and rotatably cooperates with the second axial hole on the corresponding second hinge seat, the outer periphery of the limiting sleeve is provided with a plurality of positioning convex portions in the shape of a convex arc surface, and the inner wall of the guide hole is provided with a plurality of positioning recesses matching the positioning convex portions, the inner end of the sleeve is abutted against the outer end of the multi-toothed portion to constitute an outer stroke limit for the second rotating shaft, the guide convex portion extends into the spring cavity, the two ends of the pre-tightening spring are respectively pressed against the inner ends of the guide convex portions of the two second rotating shafts, and a gasket is respectively sandwiched between the two ends of the pre-tightening spring and the two guide convex portions.

[0024] By adopting the above technical solution, due to the influence of the matching size deviation, sometimes when the second swing arm swings, it cannot effectively trigger the first micro switch or the second micro switch due to insufficient stroke, thereby causing the product to become defective and waste. In this solution, the second swing arm is designed as a split structure, which consists of a left rod body and a right rod body. The angles of the two can be adjusted at any time according to actual conditions, thereby changing the effective operating stroke of the second swing arm, so that it can effectively trigger the micro switch after adjustment. That is, when the angles of the left rod body and the right rod body need to be adjusted, it is only necessary to press the two second shafts inward to cause the preload spring to be preloaded. The multi-toothed portion on the second rotating shaft is compressed, and at the same time, the multi-toothed portion on the second rotating shaft slides into the inner multi-tooth groove of the right rod body, and the multi-toothed portion is completely separated from the outer multi-tooth groove on the left rod body at this time. Since the multi-toothed portion of the second rotating shaft is meshed with the inner multi-tooth groove of the right rod body, the right rod body can drive the two second rotating shafts to rotate synchronously. After the right rod body rotates a certain angle, the two second rotating shafts are released, and the second rotating shafts move outward under the action of the preload spring, and the outer end part of the multi-toothed portion on the second rotating shaft is meshed with the outer multi-tooth groove of the left rod body. At the same time, the limiting sleeve constitutes an outer stroke limit for the second rotating shaft, thereby realizing the locking of the left rod body and the right rod body, and the adjustment is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view of the whole embodiment 1 of the present invention; Figure 2 It is a stereogram of the whole embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the structure of the entire embodiment 1 of the present invention without the circuit board; Figure 4 This is a schematic structural diagram of the first swing arm of Example 1 of the present invention; Figure 5 This is a schematic structural diagram of the second swing arm of Example 1 of the present invention; Figure 6 Schematic diagram of the coordination structure of the first swing arm and the second swing arm in Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the structure of the second swing arm in Embodiment 2 of the present invention; Figure 8 is a cross-sectional view of the second swing arm of Embodiment 2 of the present invention; Fig. 9 An exploded view of the second swing arm of Embodiment 2 of the present invention; Fig.10 This is a schematic structural diagram of the elastic member of Example 2 of the present invention.

[0026] In the figure: 1, switch bracket; 2, circuit board; 3, dial button; 4, first micro switch; 5, second micro switch; 6, first swing arm; 7, second swing arm; 8, first pressing part; 9, second pressing part; 10, first pressure head; 11, second pressure head; 12, first hinge seat; 13, second hinge seat; 14, first shaft hole; 15, first rotating shaft; 16, second shaft hole; 17, second rotating shaft; 18, first reinforcing rib; 19, second reinforcing rib; 20, opening groove; 21, follower convex part; 22, columnar matching part; 23, bottom plate; 24, side baffle; 25, pass ; 26. Cylindrical hole; 27. Side hole; 28. Elastic part; 29. ​​Cylindrical base; 30. Elastic compensation arm; 31. Elastic convex part; 32. Locking screw; 33. Hexagon socket; 34. Left rod body; 35. Right rod body; 36. Rotation groove; 37. Rotation convex part; 38. Spring cavity; 39. Pressure-stabilizing hole; 40. Preload spring; 41. Internal multi-tooth groove; 42. External multi-tooth groove; 43. Clutch cavity; 44. Guide hole; 45. Limiting sleeve; 46. Multi-tooth part; 47. Rotation convex part; 48. Guide convex part; 49. Positioning convex part; 50. Positioning concave part; 51. Gasket. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1: As attached Figures 1 to 5The toggle structure of the piano key switch shown in the figure includes a switch bracket 1, on which a circuit board 2 and a toggle button 3 are provided, and on which a first micro switch 4 and a second micro switch 5 are electrically connected; the toggle switch also includes a two-way toggle mechanism arranged on one side of the circuit board 2, and the circuit board 2 is distributed laterally, and the two-way toggle mechanism includes a first swing rod 6 and a second swing rod 7 respectively hinged on the switch bracket 1, and the first swing rod 6 is hinged to the second swing rod 7, and one end of the first swing rod 6 away from the second swing rod 7 is linked to the toggle button 3, and the second swing rod 7 is respectively provided with a first pressing portion 8 and a second pressing portion 9 at positions on both sides of the corresponding rotation center, when the second swing rod 7 swings around the first direction to prompt the first pressing portion 8 to toggle the first micro switch 4, the second pressing portion 9 and the second micro switch 5 are in a separated state, and when the second swing rod 7 swings around the second direction to prompt the second pressing portion 9 to toggle the second micro switch 5, the first pressing portion 8 and the first micro switch 4 are in a separated state. The first swing rod 6 and the second swing rod 7 each have a rotation center, and rotate up and down in a seesaw-like manner. The first swing rod 6 and the second swing rod 7 are hingedly driven. When the dial button 3 is dialed up, the first swing rod 6 drives the second swing rod 7 to rotate, and the first pressing portion 8 on the second swing rod 7 applies pressure to the first micro switch 4 to trigger the function. When the dial button 3 is dialed down, the first swing rod 6 drives the second swing rod 7 to reverse, and the second pressing portion 9 on the second swing rod 7 applies pressure to the second micro switch 5 to trigger the function. Thus, bidirectional operation is achieved when using a single-layer circuit board 2, eliminating the connection wiring between one circuit board 2 and two circuit boards 2, greatly saving costs; at the same time, the circuit board 2 is distributed horizontally, and the bidirectional toggle mechanism is arranged on one side of the circuit board 2. The bidirectional toggle mechanism can be arranged in a 15mm Z-direction space, saving about 9mm of space compared to the double-layer circuit board 2 solution, significantly saving space requirements.

[0029] The first pressing portion 8 and the second pressing portion 9 are staggered in front and back. This design prevents the first swing rod 6 and the second swing rod 7 from interfering with each other during the swinging process, and saves installation space.

[0030] As attached Figure 2 As shown, the first pressing portion 8 is provided with a first pressing head 10 for triggering the first micro switch 4, and the second pressing portion 9 is provided with a second pressing head 11 for triggering the second micro switch 5. In this embodiment, the first pressing head 10 and the second pressing head 11 are cylindrical, and other shapes may also be used. The contact area between the pressing portion and the micro switch is reduced, and the matching is more precise.

[0031] As attached Figure 3As shown, the switch bracket 1 is provided with two first hinge seats 12 and two second hinge seats 13, the first hinge seat 12 is provided with a first shaft hole 14, the first swing rod 6 is provided with a first rotating shaft 15 on both sides thereof to match the first shaft hole 14 of the corresponding first hinge seat 12, the second hinge seat 13 is provided with a second shaft hole 16, the second swing rod 7 is provided with a second rotating shaft 17 on both sides thereof to match the second shaft hole 16 of the corresponding second hinge seat 13, wherein the first shaft hole 14 and the second shaft hole 16 can also be replaced with a circular groove. This design can realize the hinged installation of the first swing rod 6 and the second swing rod 7, the installation structure is simple and reliable, and the disassembly and assembly are very convenient.

[0032] As attached Figure 3 As shown, a first reinforcing rib 18 extending vertically is provided on the side of the first hinge seat 12, and a second reinforcing rib 19 extending vertically is provided on the side of the second hinge seat 13. The first reinforcing rib 18 and the second reinforcing rib 19 both span the shaft holes on the corresponding hinge seats. This design can improve the strength of the first hinge seat 12 and the second hinge seat 13, making them less likely to break during frequent movement of the rotating shaft, thereby improving the service life of the switch.

[0033] As attached Figures 3 to 5 As shown, the end of the first swing rod 6 away from the button 3 is provided with a concave opening groove 20, and the end of the second swing rod 7 close to the button 3 is provided with a follower convex portion 21, and the follower convex portion 21 is rotatably arranged in the opening groove 20, and the two form a fork structure. The transmission of the first swing rod 6 and the second swing rod 7 is realized by the fork structure, which has a simple structure, is easy to assemble, and has stable and reliable transmission.

[0034] As attached Figure 5 As shown, a cylindrical matching portion 22 is provided at the end of the follower protrusion 21, and the cross-sectional diameter of the cylindrical matching portion 22 is greater than the thickness of the second swing rod 7. This design is more smooth in matching, has a larger space for giving way, and is not easy to cause interference.

[0035] As attached Figure 3 As shown, the switch bracket 1 includes a bottom plate 23 and a side baffle 24, the dial button 3 and the two-way toggle mechanism are respectively arranged on both sides of the side baffle 24, and the side baffle 24 is provided with a through hole 25 for the first swing rod 6 to pass through and be linked to the dial button 3. The two-way toggle mechanism is arranged on the inner side of the side baffle 24 of the switch bracket 1, and the dial button 3 is arranged on the outer side of the side baffle 24 of the switch bracket 1, which is not only convenient for operation, but also more beautiful in appearance.

[0036] Embodiment 2: Based on embodiment 1, as shown in the attached Figures 6 to 10 As shown, this embodiment further provides an elastic compensation structure and a structure for adjusting the angle of the second swing rod 7, as described below: As attached Figures 6 to 10As shown, the cylindrical matching portion 22 is provided with a cylindrical hole 26 along the axial direction, and the outer side of the cylindrical matching portion 22 is provided with a plurality of side holes 27 connected with the cylindrical hole 26 along the circumferential direction. An elastic member 28 is inserted into the cylindrical hole 26, and the elastic member 28 includes two cylindrical bases 29 that fit with the inner wall of the cylindrical hole 26 and a plurality of elastic compensation arms 30 arranged between the two cylindrical bases 29, the number of which is equivalent to the number of the side holes 27. The plurality of elastic compensation arms 30 are distributed between the two cylindrical bases 29 in an arc shape, and the elastic compensation arms 30 are provided with at least two An elastic protrusion 31 protrudes outward, the elastic compensation arm 30 is inserted into the corresponding side hole 27, and the elastic protrusion on the elastic compensation arm 30 extends out of the side hole 27 and abuts against the inner wall of the opening groove 20; the cylindrical matching part 22 is also threadedly connected with a locking screw 32 at the positions at both ends of the cylindrical hole 26, that is, the inner wall of the cylindrical hole 26 has an internal thread that matches the locking screw 32, the inner end of the screw portion of the locking screw 32 is in contact with the corresponding end of the cylindrical base 29, and the screw head of the locking screw 32 is provided with a hexagonal groove 33. Due to the deviation of the parts size chain and the influence of the processing technology, the opening groove 20 of the first rocker arm 6 and the cylindrical matching part 22 of the second rocker arm 7 often have a large interference or a large gap, which may cause the button to get stuck or shake a lot. An elastic member 28 is arranged on the cylindrical matching part 22 of the second rocker arm 7 to press it against the opening groove 20 of the first rocker arm 6, which can effectively eliminate the above technical problems. Moreover, its position can be positioned through the cylindrical hole 26 and the side hole 27, and then locked by two locking screws 32. The installation structure is stable and reliable, and it is very convenient to disassemble and assemble.

[0037] As attached Figures 6 to 10As shown, the second swing rod 7 includes a left rod body 34 and a right rod body 35, the left rod body 34 is provided with a rotation groove 36 in the middle, the right rod body 35 is provided with a rotation convex portion 4737 matched with the rotation groove 36 in the middle, the rotation convex portion 4737 is provided with a spring cavity 38 at both ends, the outer surface of the rotation convex portion 4737 is provided with a pressure stabilizing hole 39 connected with the spring cavity 38, the spring cavity 38 is provided with a preload spring 40, and the two ends of the spring cavity 38 are respectively provided with an inner multi-tooth groove 41, The first swing rod 6 is provided with an outer multi-tooth groove 42 with the same cross section as the inner multi-tooth groove 41 at the positions at the two ends of the corresponding rotating groove 36. The inner multi-tooth groove 41 and the outer multi-tooth groove 42 are formed by multiple strip grooves distributed in a circular array. The inner multi-tooth groove 41 and the corresponding outer multi-tooth groove 42 are combined to form a clutch cavity 43. The two ends of the first swing rod 6 are respectively provided with guide holes 44 connected to the corresponding outer multi-tooth groove 42. The guide holes 44 are inserted with a limited position sleeve 45. The second rotating shaft 17 includes a multi-tooth groove 42 located in the middle. The toothed portion 46 and the rotating protrusions 4737 and the guide protrusions 48 are axially arranged at both ends of the multi-toothed portion 46, wherein the multi-toothed portion 46 is formed by a plurality of strip-shaped protrusions distributed in a circumferential array, the rotating protrusions 4737 and the guide protrusions 48 are both cylindrical, the multi-toothed portion 46 is meshedly connected in the clutch cavity 43, and the axial length of the inner multi-tooth groove 41 is greater than the axial length of the multi-toothed portion 46, the rotating protrusion 4737 passes through the limiting shaft sleeve 45 and rotates with the second shaft hole 16 on the corresponding second hinge seat 13, the The outer periphery of the limiting sleeve 45 is provided with a plurality of positioning protrusions 49 in the shape of a raised arc surface, and the inner wall of the guide hole 44 is provided with a plurality of positioning recesses 50 that match the positioning protrusions 49. The inner end of the sleeve abuts against the outer end of the multi-tooth portion 46 to constitute an outer stroke limit for the second rotating shaft 17. The guide protrusion extends into the spring cavity 38, and the two ends of the pre-tightening spring 40 are respectively pressed against the inner ends of the guide protrusions of the two second rotating shafts 17, and a gasket 51 is respectively sandwiched between the two ends of the pre-tightening spring 40 and the two guide protrusions.Due to the influence of the matching size deviation, sometimes when the second swing rod 7 swings, it cannot effectively trigger the first micro switch 4 or the second micro switch 5 due to insufficient stroke, which leads to defective products becoming scrapped. In this solution, the second swing rod 7 is designed as a split structure, which is composed of a left rod body 34 and a right rod body 35. The angles of the two can be adjusted at any time according to actual conditions, so as to change the effective operating stroke of the second swing rod 7, so that it can effectively trigger the micro switch after adjustment. That is, when it is necessary to adjust the angles of the left rod body 34 and the right rod body 35, it is only necessary to press the two second rotating shafts 17 inwardly to compress the preload spring 40, and at the same time, the multi-tooth portion 46 on the second rotating shaft 17 slides to the right The multi-toothed portion 46 is in the inner multi-toothed groove 41 of the rod body 35, and the multi-toothed portion 46 is completely separated from the outer multi-toothed groove 42 on the left rod body 34 at this time. Since the multi-toothed portion 46 of the second rotating shaft 17 is meshed with the inner multi-toothed groove 41 of the right rod body 35, the right rod body 35 can drive the two second rotating shafts 17 to rotate synchronously. After the right rod body 35 rotates a certain angle, the two second rotating shafts 17 are released, and the second rotating shafts 17 move outward under the action of the preload spring 40. The outer end part of the multi-toothed portion 46 on the second rotating shaft 17 is meshed with the outer multi-toothed groove 42 of the left rod body 34. At the same time, the limiting sleeve 45 constitutes an outer stroke limit for the second rotating shaft 17, thereby realizing the locking of the left rod body 34 and the right rod body 35, and the adjustment is very convenient.

Claims

1. A toggle switch structure of a piano key switch, comprising a switch bracket (1), wherein a circuit board (2) and a toggle button (3) are arranged on the switch bracket (1), and a first micro switch (4) and a second micro switch (5) are electrically connected to the circuit board (2); characterized in that: The invention also comprises a bidirectional toggle mechanism arranged on one side of the circuit board (2), and the circuit board (2) is arranged in a transverse direction. The bidirectional toggle mechanism comprises a first swing rod (6) and a second swing rod (7) respectively hinged on the switch bracket (1), and the first swing rod (6) and the second swing rod (7) are hingedly connected. One end of the first swing rod (6) away from the second swing rod (7) is linked to the toggle button (3). The second swing rod (7) is provided with a first pressing part (8) and a second pressing part (9) at positions on both sides of the corresponding rotation center. When the second swing rod (7) swings around the first direction to cause the first pressing part (8) to toggle the first micro switch (4), the second pressing part (9) and the second micro switch (5) are in a separated state. When the second swing rod (7) swings around the second direction to cause the second pressing part (9) to toggle the second micro switch (5), the first pressing part (8) and the first micro switch (4) are in a separated state.

2. The piano key switch toggle structure according to claim 1, characterized in that: The first pressing portion (8) and the second pressing portion (9) are arranged in a front-to-back staggered manner.

3. The piano key switch toggle structure according to claim 2, characterized in that: A first pressing head (10) is protruded on the first pressing portion (8) and is used to trigger the first micro switch (4), and a second pressing head (11) is protruded on the second pressing portion (9) and is used to trigger the second micro switch (5).

4. The piano key switch toggle structure according to claim 1, characterized in that: The switch bracket (1) is provided with two first hinge seats (12) and two second hinge seats (13); the first hinge seat (12) is provided with a first shaft hole (14); the first swing arm (6) is provided with first rotating shafts (15) on both sides thereof and matched with the first shaft holes (14) of the corresponding first hinge seats (12); the second hinge seat (13) is provided with a second shaft hole (16); the second swing arm (7) is provided with second rotating shafts (17) on both sides thereof and matched with the second shaft holes (16) of the corresponding second hinge seats (13).

5. The piano key switch toggle structure according to claim 4, characterized in that: A first reinforcing rib (18) extending vertically is provided on the side of the first hinge seat (12), and a second reinforcing rib (19) extending vertically is provided on the side of the second hinge seat (13).

6. The piano key switch toggle structure according to claim 1, characterized in that: An end of the first swing rod (6) away from the dial button (3) is provided with an inwardly concave opening groove (20), and an end of the second swing rod (7) close to the dial button (3) is provided with a follower convex portion (21), and the follower convex portion (21) is rotatably arranged in the opening groove (20).

7. The piano key switch toggle structure according to claim 6, characterized in that: The end of the follower protrusion (21) is provided with a columnar matching portion (22), and the cross-sectional diameter of the columnar matching portion (22) is greater than the thickness of the second swing rod (7).

8. The piano key switch toggle structure according to claim 1, characterized in that: The switch bracket (1) comprises a bottom plate (23) and a side baffle (24); the dial button (3) and the two-way dial mechanism are respectively arranged on both sides of the side baffle (24); and the side baffle (24) is provided with a through opening (25) for the first swing rod (6) to pass through and to be linked to the dial button (3).

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