A reversing speed regulating switch

Abstract

A reversing speed control switch comprises a hollow housing, a circuit board fixedly disposed within the housing and connected to a circuit, a switch speed control assembly mating with the housing, and a reversing assembly mating with the housing. The circuit board is fixedly disposed between the switch speed control assembly and the reversing assembly. The switch speed control assembly comprises a speed control button externally disposed outside the housing, a speed control lever with one end fixedly connected to the speed control button and partially disposed within the housing, and a return spring fixedly connected to the other end of the speed control lever and fixedly disposed within the housing. A switch reed blade and a magnetic field generating element connected to the circuit board are fixedly disposed on the side of the speed control lever facing the circuit board. The reversing assembly comprises a dial handle disposed outside the housing and mating with the housing, a transmission handle disposed within the housing and fixedly connected to the dial handle, and a conductive member fixedly disposed on the side of the transmission handle facing the circuit board. This design offers the advantages of enabling switch speed control in a single action, reliable speed control, a streamlined overall structure, and protection against accidental touches.

Description

Technical Field

[0001] The present invention relates to the field of switches, and in particular to a reversing speed regulating switch applicable to various tools and equipment requiring reversing speed regulation. Background Art

[0002] There are many types and speed regulation methods of existing speed regulation switches. Most speed regulation switches need to be turned on before the speed regulation can be carried out. The same is true during the end of speed regulation. It is necessary to first perform the speed regulation end action, that is, turn off the speed regulation, and then close the switch. It takes at least two switching actions to turn the speed regulation on or off once to perform the speed regulation action normally. The use process steps are relatively many and troublesome. On the other hand, the existing more common speed regulation switches usually need to be equipped with a reversing component separately when there is a need for forward and reverse switching. This results in more parts of the overall speed regulation switch, and the space layout inside the switch housing is extremely difficult. The structure of the overall speed regulation switch is bloated and difficult to design. Moreover, after the reversing component is installed, the overall speed regulation switch needs to be adjusted at least three times before it can work normally. The large number of operating steps also makes the switch easy to be accidentally touched during operation. The speed regulation switch that is accidentally touched is easy to cause personal injury accidents, and the safety performance is low. Summary of the Invention

[0003] The object of the present invention is to provide a reversing speed regulating switch which can complete switch opening speed regulation in one action, has reliable speed regulation, has a simple overall structure and can prevent accidental touch.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a reversing speed regulating switch, comprising a hollow shell, a circuit board fixedly arranged in the shell and connected to the circuit, a switch speed regulating component matched with the shell, and a reversing component matched with the shell, wherein the circuit board is fixedly arranged between the switch speed regulating component and the reversing component, the switch speed regulating component comprises a speed regulating button externally arranged outside the shell, a speed regulating rod with one end fixedly connected to the speed regulating button and partially arranged in the shell, and a return spring fixedly connected to the other end of the speed regulating rod and fixedly arranged in the shell, wherein the speed regulating rod is fixedly provided with a circuit connected to the side facing the circuit board. The switch reed and magnetic field generating element include a first magnetic steel, a second magnetic steel that interacts with the first magnetic steel and generates a magnetic field, and a wiring piece group and a linear Hall element connected to the circuit are fixedly provided on the side of the circuit board facing the speed regulating lever, corresponding to the switch reed and the magnetic field generating element. The two free ends of the switch reed are in contact with the surface of the circuit board wiring piece group, and slide in or out of the wiring piece group under the drive of the moving speed regulating lever. One end of the return spring is fixedly connected to the speed regulating lever and the other end is fixedly connected to the side of the shell away from the speed regulating button. The reversing assembly includes a The dial handle cooperates with the shell, the transmission handle is arranged in the shell and fixedly connected to the dial handle, and the conductive piece is fixedly arranged on the side of the transmission handle facing the circuit board. The positions of the conductive pieces on the side of the circuit board facing the transmission handle are respectively provided with commutator segment groups connected to the commutation circuit. The commutator segment group includes a commutation main wiring piece, a first commutator segment, and a second commutator segment. The commutation main wiring piece is located between the first commutator segment and the second commutator segment. The two conductive ends of the conductive piece are in contact with the surface where the commutator segment group is located, and slide in or out of the commutator segment group under the drive of the moving transmission handle. The first commutator segment and the second commutator segment are closest to each other. The small spacing is greater than the maximum spacing between the two conducting ends of the conductive part, the minimum spacing between the first commutator segment and the commutation main wiring piece is smaller than the minimum spacing between the two conducting ends of the conductive part, the minimum spacing between the second commutator segment and the commutation main wiring piece is smaller than the minimum spacing between the two conducting ends of the conductive part, the dial handle is located below the speed regulation button and a limit plate is fixedly provided on the dial handle, an error-touch top plate is fixedly provided inside the speed regulation button at a position corresponding to the limit plate, the limit plate is located below the error-touch top plate, and an accommodation space is formed between the two sides of the error-touch top plate and the inner wall of the speed regulation button for accommodating the limit plate after displacement.

[0005] The beneficial effects of the present invention are as follows: compared with the prior art, the present invention designs a wiring plate group and a linear Hall element on one side of the circuit board and a commutator plate group on the other side of the circuit board, thereby making full use of the space on the circuit board, and setting a switch reed and a magnetic field generating element on the speed control rod. Through the cooperation of the two with the wiring plate group and the linear Hall element on the circuit board, the overall speed control switch is opened and speed controlled, and closed and speed controlled. A movable commutator assembly is set on one side of the commutator plate group, and different forms of conduction of the commutator plate group are performed through the conductive member to complete the commutation and switching of the overall speed control switch. The design of the three sharing a circuit board effectively avoids the separate installation of the commutator assembly in the prior art, facilitates the design of the internal space of the overall speed control switch shell, and the internal structure of the overall speed control switch is more reasonable, compact and streamlined, which facilitates the miniaturized integrated design of the overall switch.

[0006] The present invention adopts the reciprocating motion design of the speed regulating rod so that the overall speed regulating switch can be turned on and then the speed regulating of the switch can be continued by pressing the speed regulating button once, thereby avoiding the problem that the speed regulating switch in the prior art needs to perform the switch opening and speed regulating actions separately, which causes troublesome operation. The design of first conducting the switch circuit and then regulating the speed improves the safety of the speed regulating switch during use and reduces the possibility of accidental injury during the use of the switch. The two free ends of the switch reed slide in and out of the terminal group to close and open the switch circuit, making the process of closing and opening the switch circuit simple, direct and not prone to errors. During the speed regulation process of the switch, the linear Hall element does not contact the magnetic field generating element, so the wear and aging problem of the existing contact speed regulation switch after long-term and multiple friction and touch will not occur. The working performance and service life of the overall speed regulation switch are greatly improved, saving the use cost. On the other hand, the switch speed regulation action itself, in which the speed regulation rod drives the switch reed and the magnetic field generating element to move back and forth relative to the circuit board, is simple, reliable and not prone to errors compared to some of the existing more complex structural actions. The overall speed regulation switch uses very few parts and has a relatively compact structure, which is convenient for the miniaturized integrated design of the speed regulation switch.

[0007] The present invention also implements an anti-accidental-touch design for the speed control button through the design of a limit plate on the dial handle and an accidental-touch top plate on the speed control button. That is, when the reversing circuit is not conducting, the speed control button cannot be normally stressed, the speed control rod cannot correctly reciprocate, and ultimately the switch circuit cannot be normally conducted and the speed cannot be normally adjusted. Thus, even if the speed control button is accidentally touched, as long as the reversing circuit is not conducted, the speed control switch cannot work normally. Only after the reversing component completes the conduction of the reversing circuit, can the speed control button be normally stressed and normally drive the speed control rod to reciprocate and close the switch circuit and adjust the speed normally. The above-mentioned anti-accidental-touch design greatly improves the safety of the speed control switch and reduces personal injury accidents that are very easy to occur after accidental touching.

[0008] Furthermore, the dial handle is rotatably connected to a portion of the housing, the transmission handle is fixedly connected to the dial handle and is driven by the dial handle to swing around the connection position between the transmission handle and the dial handle in the housing. The conductive member conducts the commutator segment group under the drive of the transmission handle and forms a fan-shaped motion trajectory. The commutator segment group is fixedly arranged on the surface of the circuit board corresponding to the fan-shaped motion trajectory and is distributed in an arc shape.

[0009] Furthermore, the transmission handle is provided with a mounting groove which is open towards the circuit board and hollow inside on the side facing the circuit board, the conductive part is partially fixedly installed in the mounting groove and partially exposed outside the mounting groove, the two conductive ends of the conductive part are located outside the mounting groove, and the transmission handle is also provided with a matching hole on the side away from the dial handle, a limiting spring is provided in the matching hole, a matching sleeve with an accommodating hole inside and partially exposed outside the matching hole, one end of the limiting spring is fixed in the matching hole and the other end is fixedly connected to the inside of the matching sleeve through the accommodating hole to realize the rebound extension of the matching sleeve, the end of the matching sleeve exposed outside the matching hole is a spherical surface, and the outer shell is also fixedly provided with an abutment member which abuts and cooperates with the matching sleeve, and the abutment member is provided with a wavy abutting surface on the side corresponding to the matching sleeve, and the position switching and locking of the reversing component in the outer shell during the reversing process are realized through the abutment and rebound extension of one end of the spherical surface of the matching sleeve with the wavy abutting surface.

[0010] Furthermore, the top of the limit plate is an arc-shaped limit surface with an outward convex arc in longitudinal section, and the bottom of the mistakenly touched top plate is an arc-shaped mating surface with an inward concave arc in longitudinal section. When the reversing circuit is not turned on, after the speed adjustment button is accidentally touched, the bottom of the mistakenly touched top plate moves downward and the bottom of the mistakenly touched top plate covers the top of the limit plate to make contact and lock the two, thereby realizing the limitation of the reversing component in the reversing direction after the accidental touch.

[0011] Furthermore, the terminal block group includes a normally-on terminal block connected to the circuit, a switch terminal block connected to the circuit, and an insulating plate fixedly arranged on the circuit board. The switch terminal block is located between the insulating plate and the normally-on terminal block. The position line of the insulating plate, the switch terminal block, and the normally-on terminal block is parallel to the reciprocating direction of the speed regulating rod. When the external force is not applied to the speed regulating button, one free end of the switch reed contacts the surface of the normally-on terminal block, and the other free end contacts the surface of the insulating plate. After the external force acts on the speed regulating button, the speed regulating rod drives the two ends of the switch reed to contact the circuit board. The surface contacts and slides on the surface of the circuit board, one free end of the switch reed slides on the surface of the normally-connected wiring piece, and the other free end slides out from the surface of the insulating sheet and slides into the switch wiring piece through a portion of the circuit board surface, thereby conducting a switch circuit connected between the normally-connected wiring piece and the switch wiring piece. After the external force disappears, the speed regulating rod returns to its original position under the action of the return spring, and one free end of the switch reed continues to slide on the surface of the normally-connected wiring piece, and the other free end slides out from the surface of the switch wiring piece and disconnects the switch circuit connected between the normally-connected wiring piece and the switch wiring piece, and then slides into the surface of the insulating sheet through a portion of the circuit board surface to complete the reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of a reversing speed regulating switch.

[0013] Figure 2 This is a schematic diagram of the structure of the reversing speed control switch with part of the shell removed.

[0014] Figure 3 This is a schematic diagram of the position of the speed control lever and the circuit board.

[0015] Figure 4 The diagram is a schematic diagram of the coordination of the switch reed, the magnetic field generating element, and the circuit board when the switch circuit is disconnected in a preferred embodiment of the reversing speed regulating switch.

[0016] Figure 5 The diagram is a schematic diagram of the coordination of the switch reed, the magnetic field generating element, and the circuit board when the switch circuit is closed in a preferred embodiment of the reversing speed regulating switch.

[0017] Figure 6 This is a schematic diagram of the state after the reversing component in a preferred embodiment of the reversing speed regulating switch conducts the reversing circuit between the first commutator segment and the reversing main connecting segment.

[0018] Figure 7 The diagram is a schematic diagram of a preferred embodiment of a reversing speed regulating switch in which the reversing component does not conduct the reversing circuit.

[0019] Figure 8 This is a schematic diagram of the state after the reversing component in a preferred embodiment of the reversing speed regulating switch conducts the reversing circuit between the second commutator segment and the reversing main connecting segment.

[0020] Figure 9 yes Figure 7 Schematic diagram of the cooperation between the transmission handle and the abutment part in the state.

[0021] Figure 10 yes Figure 6 Schematic diagram of the cooperation between the transmission handle and the abutment part in the state.

[0022] Figure 11 yes Figure 8 Schematic diagram of the cooperation between the transmission handle and the abutment part in the state.

[0023] Figure 12 It is a schematic diagram of the overall structure of the conductive component.

[0024] Figure 13 yes Figure 6 Schematic diagram of the coordination between the conductive component and the circuit board in the state.

[0025] Figure 14 yes Figure 7 Schematic diagram of the coordination between the conductive component and the circuit board in the state.

[0026] Figure 15 yes Figure 8 Schematic diagram of the coordination between the conductive component and the circuit board in the state. DETAILED DESCRIPTION

[0027] In order to make the technical means, innovative features and functions of the present invention easier to understand, the present invention will be further described below.

[0028] like Figure 1-15As shown, the technical solution of the reversing speed regulating switch of the present invention includes a hollow shell 1, a circuit board 2 fixedly arranged in the shell 1 and connected to the circuit, a switch speed regulating component matched with the shell 1, and a reversing component matched with the shell 1. The circuit board 2 is fixedly arranged between the switch speed regulating component and the reversing component. The switch speed regulating component includes a speed regulating button 4 external to the shell 1, a speed regulating rod 5 with one end fixedly connected to the speed regulating button 4 and partially arranged in the shell 1, and a return spring 6 fixedly connected to the other end of the speed regulating rod 5 and fixed in the shell 1. The speed regulating rod 5 is fixedly provided with a switch reed 7 connected to the circuit and a magnetic field generating element on the side facing the circuit board 2. The magnetic field generating element The component includes a first magnetic steel 8, a second magnetic steel 9 that interacts with the first magnetic steel 8 and generates a magnetic field, and a wiring piece group and a linear Hall element 3 connected to the circuit are fixedly provided on the side of the circuit board 2 facing the speed regulating rod 5, corresponding to the switch reed 7 and the magnetic field generating element. The two free ends of the switch reed 7 are in contact with the surface where the wiring piece group of the circuit board 2 is located, and slide in or out of the wiring piece group under the drive of the moving speed regulating rod 5. One end of the return spring 6 is fixedly connected to the speed regulating rod 5 and the other end is fixedly connected to the side of the inside of the housing 1 away from the speed regulating button 4. The reversing assembly includes a handle 13 provided outside the housing 1 and cooperating with the housing 1, and a handle 13 provided inside the housing 1 and fixed to the handle 13 The connected transmission handle 14, the conductive member 15 fixedly arranged on the side of the transmission handle 14 facing the circuit board 2, the circuit board 2 facing the transmission handle 14 side corresponding to the conductive member 15 position are respectively provided with a commutator segment group connected to the commutation circuit, the commutator segment group includes a commutation main terminal 16, a first commutator segment 17, and a second commutator segment 18, the commutation main terminal 16 is located between the first commutator segment 17 and the second commutator segment 18, the two conducting ends of the conductive member 15 are in contact with the surface where the commutator segment group is located, and slide in or out of the commutator segment group under the drive of the moving transmission handle 14, the minimum spacing between the first commutator segment 17 and the second commutator segment 18 is greater than the two ends of the conductive member 15 The maximum spacing between the conductive ends, the minimum spacing between the first commutator segment 17 and the commutation main wiring piece 16 is smaller than the minimum spacing between the two conductive ends of the conductive member 15, and the minimum spacing between the second commutator segment 18 and the commutation main wiring piece 16 is smaller than the minimum spacing between the two conductive ends of the conductive member 15. The handle 13 is located below the speed regulation button 4 and a limit plate 19 is fixedly provided on the handle 13. A false touch top plate 20 is fixedly provided at the position corresponding to the limit plate 19 inside the speed regulation button 4. The limit plate 19 is located below the false touch top plate 20, and an accommodating space for accommodating the displaced limit plate 19 is formed between the two sides of the false touch top plate 20 and the inner wall of the speed regulation button 4.

[0029] When the reversing circuit is not switched, that is, when the limit plate 19 is located below the false touch top plate 20, the speed regulating button 4 is in an anti-false touch state. Even if an external force acts on the speed regulating button 4, the speed regulating rod 5 cannot start the reciprocating displacement normally. After the external force acts on the dial handle 13, the dial handle 13 drives the transmission handle 14 to move in the housing 1, and one conducting end of the conducting member 15 slides into the surface of the first commutator segment 17, and the other conducting end slides into the surface of the reversing main terminal piece 16 to realize the conduction of one reversing circuit. When it is necessary to conduct another reversing circuit, one conducting end of the conducting member 15 slides into the surface of the reversing main terminal piece 16, and the other conducting end slides into the surface of the second commutator segment 18 to realize the conduction of the other reversing circuit. The switching of the two switching circuits is completed. After the switching of the switching circuit is completed, the position of the limit plate 19 is offset relative to the position of the false touch top plate 20, and the anti-false touch state of the speed control button 4 is released. After the external force acts on the speed control button 4, the speed control rod 5 is limited by the inner wall of the shell 1, the circuit board 2 and the return spring 6, and reciprocates relative to the circuit board 2 in the shell 1. The two free ends of the switch reed 7 slide in or out of the surface of the terminal group, thereby turning on or off the switch circuit connected to the terminal group. After the switch circuit is turned on, the linear Hall element 3 senses the magnetic field strength passing through the linear Hall element 3 and outputs a corresponding Hall voltage.

[0030] In one embodiment of the present invention, Figure 1 、 2 As shown in Figures 6, 7, and 8, the dial handle 13 is rotatably connected and matched with a part of the housing 1, the transmission handle 14 is fixedly connected and matched with the dial handle 13 and is driven by the dial handle 13 to swing around the connection position of the transmission handle 14 and the dial handle 13 in the housing 1, and the conductive member 15 is driven by the transmission handle 14 to conduct the commutator segment group and form a fan-shaped motion trajectory. The commutator segment group is fixedly arranged on the surface of the circuit board 2 corresponding to the fan-shaped motion trajectory and is distributed in an arc shape. Through the design of the rotatable connection and matching of the dial handle 13 with a part of the housing 1 and the swinging of the transmission handle 14 in the housing 1, the matching between the housing 1 and the dial handle 13 is minimized from occupying too much space on the outer surface of the housing 1, and the matching space between the housing 1 and the dial handle 13 is prevented from being too large, causing dust outside the housing 1 and other substances that may have an impact on the inside of the switch to enter the housing 1, and the accumulation of hysteresis for a long time to affect the internal components of the speed control switch.

[0031] In order to make the switching process of the reversing component smoother and prevent misoperation during the switching process of the reversing component, such as Figure 9-11As shown, in a preferred embodiment of the present invention, the transmission handle 14 is provided with a mounting groove that is open toward the circuit board 2 and hollow inside on the side facing the circuit board 2. The conductive member 15 is partially fixedly installed in the mounting groove and partially exposed outside the mounting groove. The two conductive ends of the conductive member 15 are located outside the mounting groove. The transmission handle 14 is further provided with a matching hole on the side away from the dial handle 13. A limit spring 21 is provided in the matching hole, and a matching sleeve 22 with an accommodating hole inside and partially exposed outside the matching hole is provided. One end of the limit spring 21 is fixed in the matching hole and the other end is fixedly connected to the inside of the matching sleeve 22 through the accommodating hole to realize the resilient extension and contraction of the matching sleeve 22. The end of the mating sleeve 22 exposed outside the mating hole is a spherical surface, and an abutment piece 23 that abuts and cooperates with the mating sleeve 22 is fixedly provided in the shell 1. The abutment piece 23 is provided with a wavy abutment surface on the side corresponding to the mating sleeve 22. The position switching and locking of the reversing component in the shell 1 during the reversing process are realized through the abutment and resilience of one end of the spherical surface of the mating sleeve 22 with the wavy abutment surface. The abutment of one end of the mating sleeve 22 with the wavy abutment surface makes it easier to distinguish the switching process and the conduction state of the reversing component, thereby preventing the occurrence of misoperation and avoiding the problem of multiple switches required to return to normal working state after misoperation.

[0032] In actual application, when the speed regulating button 4 is accidentally touched and a large external force acts on the speed regulating button 4, although the speed regulating button 4 is difficult to move in the reciprocating motion direction, the top of the limit plate 19 may be forced to move randomly in the reversing direction after being subjected to a large external force. In severe cases, the reversing circuit may be mis-connected, thereby causing a safety problem. Therefore, in one embodiment of the present invention, Figure 6-8 As shown, the top of the limit plate 19 is an arc-shaped limit surface with an outward convex arc section, and the bottom of the mistakenly touched top plate 20 is an arc-shaped matching surface with an inward concave arc section. When the reversing circuit is not turned on, after the speed control button 4 is mistakenly touched, the bottom of the mistakenly touched top plate 20 moves down and the bottom of the mistakenly touched top plate 20 covers the top of the limit plate 19 to make contact and lock the two, thereby realizing the limitation of the reversing component in the reversing direction after the mistaken touch, so that even when it is subjected to large force, the reversing circuit will not be mis-turned on.

[0033] like Figure 2 As shown, in the actual application process of the present invention, it is also necessary to miniaturize the overall reversing speed regulating switch, in order to save the space inside the housing 1 as much as possible, make full use of the space between the speed regulating rod 5 and the circuit board 2, and avoid the waste of the internal space of the housing 1 by some irregular structural designs, such as Figure 2-5As shown, the surface where the switch reed 7 and the magnetic field generating element are located is parallel to the surface of the circuit board 2 facing the speed regulating rod 5, and the plane of the linear Hall element 3 facing the speed regulating rod 5 is parallel to the plane of the first magnetic steel 8 and the second magnetic steel 9 facing the circuit board 2, and the distance between the first magnetic steel 8 and the second magnetic steel 9 is adjustable.

[0034] In one embodiment of the present invention, the terminal block group includes a normally-on terminal block 10 connected to the circuit and a switch terminal block 11 connected to the circuit. One free end of the switch reed 7 contacts the normally-on terminal block 10 and slides on the surface of the normally-on terminal block 10. The other free end of the switch reed 7 contacts the surface of the circuit board 2 and can slide in or out of the surface of the switch terminal block 11. After the speed control button 4 is pressed by an external force, the speed control rod 5 drives the two ends of the switch reed 7 to contact the surface of the circuit board 2 and slide on the surface of the circuit board 2. One free end of the switch reed 7 slides on the surface of the normally-on terminal block 10, and the other free end slides out of the circuit board 2. The surface of the plate 2 slides into the surface of the switch terminal piece 11, conducting the switching circuit between the normally-conducting terminal piece 10 and the switch terminal piece 11, and thus the switch is turned on. After the switch is turned on, the linear Hall element 3 senses the magnetic field strength passing through the linear Hall element 3 and outputs the corresponding Hall voltage and performs speed regulation. After the external force disappears, under the action of the return spring 6, the free end of the switch reed piece 7 located on the surface of the switch terminal piece 11 slides out of the surface of the switch terminal piece 11, disconnecting the switching circuit between the normally-conducting terminal piece 10 and the switch terminal piece 11, and thus the switch is turned off. At the same time as the switch is turned off, the linear Hall element 3 stops sensing the magnetic field strength, and thus the speed regulation ends.

[0035] Similarly, in the actual application of the present invention, the available area on the circuit board 2 is also stretched, and the position design of the insulating sheet 12, the switch terminal piece 11, and the normally-connected terminal piece 10 should also avoid wasting space on the circuit board as much as possible. Therefore, in a preferred embodiment of the present invention, as shown in FIG. Figure 4-5As shown, the terminal block group includes a normally-on terminal block 10 connected to the circuit, a switch terminal block 11 connected to the circuit, and an insulating sheet 12 fixedly arranged on the circuit board 2. The switch terminal block 11 is located between the insulating sheet 12 and the normally-on terminal block 10. The position line of the insulating sheet 12, the switch terminal block 11, and the normally-on terminal block 10 is parallel to the reciprocating direction of the speed regulating rod 5. When the external force is not applied to the speed regulating button 4, one free end of the switch reed 7 contacts the surface of the normally-on terminal block 10, and the other free end contacts the surface of the insulating sheet 12. After the external force acts on the speed regulating button 4, the speed regulating rod 5 drives the two ends of the switch reed 7 to contact the circuit board 2 surface contact and slide on the surface of the circuit board 2, one free end of the switch reed 7 slides on the surface of the normally-conducting terminal lug 10, and the other free end slides out from the surface of the insulating sheet 12 and slides into the switch terminal lug 11 through a portion of the circuit board 2 surface, thereby conducting the switch circuit connecting the normally-conducting terminal lug 10 and the switch terminal lug 11. After the external force disappears, the speed regulating rod 5 returns to its original position under the action of the return spring 6, and one free end of the switch reed 7 continues to slide on the surface of the normally-conducting terminal lug 10, and the other free end slides out from the surface of the switch terminal lug 11 and disconnects the switch circuit connecting the normally-conducting terminal lug 10 and the switch terminal lug 11, and then slides into the surface of the insulating sheet 12 through a portion of the circuit board 2 surface to complete the reset.

[0036] Although the present invention has been disclosed above with reference to specific embodiments, they are not intended to limit the present invention. Any person skilled in the art may make slight changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the appended claims.

Claims

1. A reversing speed regulating switch, characterized in that: The invention comprises a hollow shell (1), a circuit board (2) fixedly arranged in the shell (1) and connected to the circuit, a switch speed regulating component matched with the shell (1), and a reversing component matched with the shell (1), wherein the circuit board (2) is fixedly arranged between the switch speed regulating component and the reversing component, and the switch speed regulating component comprises a speed regulating button (4) externally arranged outside the shell (1), a speed regulating rod (5) fixedly connected to the speed regulating button (4) at one end and partially arranged in the shell (1), and a return spring (6) fixedly connected to the other end of the speed regulating rod (5) and fixed in the shell (1), wherein the speed regulating rod (5) is fixedly provided with a switch reed (7) connected to the circuit and a magnetic field generating element on the side facing the circuit board (2), and the magnetic field generating element comprises a first magnetic steel (8), a magnetic steel connected to the first magnetic steel The second magnetic steel (9) interacts with the steel (8) and generates a magnetic field. A wiring plate group connected to the circuit and a linear Hall element (3) are fixedly provided on the circuit board (2) at a position corresponding to the switch reed (7) and the magnetic field generating element on the side facing the speed regulating rod (5). The two free ends of the switch reed (7) are in contact with the surface of the wiring plate group of the circuit board (2) and slide into or out of the wiring plate group under the drive of the moving speed regulating rod (5). One end of the return spring (6) is fixedly connected to the speed regulating rod (5) and the other end is fixedly connected to the side of the housing (1) away from the speed regulating button (4). The reversing component includes a dial handle (13) provided outside the housing (1) and matched with the housing (1), a transmission handle (14) provided inside the housing (1) and fixedly connected to the dial handle (13). ), a conductive member (15) fixedly arranged on the side of the transmission handle (14) facing the circuit board (2), and a commutator segment group connected to the commutation circuit is respectively provided at the position of the conductive member (15) on the side facing the transmission handle (14), wherein the commutator segment group includes a commutation main terminal segment (16), a first commutator segment (17), and a second commutator segment (18). The commutation main terminal segment (16) is located between the first commutator segment (17) and the second commutator segment (18). The two conductive ends of the conductive member (15) are in contact with the surface where the commutator segment group is located, and slide in or out of the commutator segment group under the drive of the moving transmission handle (14). The minimum distance between the first commutator segment (17) and the second commutator segment (18) is greater than the minimum distance between the two conductive ends of the conductive member (15). The maximum spacing between the first commutator segment (17) and the commutation main terminal segment (16) is smaller than the minimum spacing between the two conducting ends of the conductive member (15); the minimum spacing between the second commutator segment (18) and the commutation main terminal segment (16) is smaller than the minimum spacing between the two conducting ends of the conductive member (15); the dial handle (13) is located below the speed regulating button (4) and a limit plate (19) is fixedly provided on the dial handle (13); an error-touch top plate (20) is fixedly provided inside the speed regulating button (4) at a position corresponding to the limit plate (19); the limit plate (19) is located below the error-touch top plate (20); and an accommodation space for accommodating the limit plate (19) after displacement is formed between two sides of the error-touch top plate (20) and the inner wall of the speed regulating button (4).

2. A reversing speed regulating switch according to claim 1, characterized in that: The dial handle (13) is rotatably connected to a portion of the housing (1); the transmission handle (14) is fixedly connected to the dial handle (13) and is driven by the dial handle (13) to swing around the connection position between the transmission handle (14) and the dial handle (13) in the housing (1); the conductive member (15) is driven by the transmission handle (14) to conduct the commutator segment group and form a fan-shaped motion trajectory; the commutator segment group is fixedly arranged on the surface of the circuit board (2) corresponding to the fan-shaped motion trajectory and is distributed in an arc shape.

3. A reversing speed regulating switch according to claim 1 or 2, characterized in that: The transmission handle (14) is provided with a mounting groove on the side facing the circuit board (2) and having a hollow interior, the conductive member (15) is partially fixedly installed in the mounting groove and partially exposed outside the mounting groove, and the two conductive ends of the conductive member (15) are located outside the mounting groove. The transmission handle (14) is further provided with a matching hole on the side away from the dial handle (13), a limit spring (21) is provided in the matching hole, and a matching sleeve (22) is provided with a receiving hole in the matching hole and partially exposed outside the matching hole, one end of the limit spring (21) is fixed in the matching hole and the other end is fixed in the matching hole. The end is fixedly connected to the inside of the matching sleeve (22) through the accommodating hole to realize the resilient extension and retraction of the matching sleeve (22); the end of the matching sleeve (22) exposed outside the matching hole is a spherical surface; an abutting piece (23) is fixedly provided in the housing (1) to abut against the matching sleeve (22); a wavy abutting surface is provided on one side of the abutting piece (23) corresponding to the matching sleeve (22); the position switching and locking of the reversing component in the housing (1) during the reversing process are realized by the abutting and resilient extension and retraction of one end of the spherical surface of the matching sleeve (22) with the wavy abutting surface.

4. A reversing speed regulating switch according to claim 1 or 2, characterized in that: The top of the limit plate (19) is an arc-shaped limit surface with an outward convex arc in longitudinal section, and the bottom of the false touch top plate (20) is an arc-shaped matching surface with an inward concave arc in longitudinal section. When the reversing circuit is not turned on, after the speed regulating button (4) is mistakenly touched, the bottom of the false touch top plate (20) moves downward and the bottom of the false touch top plate (20) covers the top of the limit plate (19) to achieve contact and locking between the two, thereby realizing the limitation of the reversing component in the reversing direction after the false touch.

5. The reversing speed regulating switch according to claim 3, characterized in that: The top of the limit plate (19) is an arc-shaped limit surface with an outward convex arc in longitudinal section, and the bottom of the false touch top plate (20) is an arc-shaped matching surface with an inward concave arc in longitudinal section. When the reversing circuit is not turned on, after the speed regulating button (4) is mistakenly touched, the bottom of the false touch top plate (20) moves downward and the bottom of the false touch top plate (20) covers the top of the limit plate (19) to achieve contact and locking between the two, thereby realizing the limitation of the reversing component in the reversing direction after the false touch.

6. A reversing speed regulating switch according to claim 1, 2 or 5, characterized in that: The wiring piece group includes a normally connected wiring piece (10) connected to the circuit, a switch wiring piece (11) connected to the circuit, and an insulating piece (12) fixed on the circuit board (2), wherein the switch wiring piece (11) is located between the insulating piece (12) and the normally connected wiring piece (10), and the position line of the insulating piece (12), the switch wiring piece (11) and the normally connected wiring piece (10) is parallel to the reciprocating direction of the speed regulating rod (5). When the external force does not act on the speed regulating button (4), one free end of the switch reed (7) contacts the surface of the normally connected wiring piece (10) and the other free end contacts the surface of the insulating piece (12). After the external force acts on the speed regulating button (4), the speed regulating rod (5) drives the two ends of the switch reed (7) to contact the circuit board (2 ) surface contacts and slides on the surface of the circuit board (2), one free end of the switch reed (7) slides on the surface of the normally connected wiring piece (10), and the other free end slides out from the surface of the insulating sheet (12) and slides into the switch wiring piece (11) through a portion of the circuit board (2) surface, thereby conducting the switch circuit connected between the normally connected wiring piece (10) and the switch wiring piece (11). After the external force disappears, the speed regulating rod (5) returns to its original position under the action of the return spring (6), and one free end of the switch reed (7) continues to slide on the surface of the normally connected wiring piece (10), and the other free end slides out from the surface of the switch wiring piece (11) and disconnects the switch circuit connected between the normally connected wiring piece (10) and the switch wiring piece (11), and then slides into the surface of the insulating sheet (12) through a portion of the circuit board (2) surface to complete the reset.

7. The reversing speed regulating switch according to claim 3, characterized in that: The wiring piece group includes a normally connected wiring piece (10) connected to the circuit, a switch wiring piece (11) connected to the circuit, and an insulating piece (12) fixed on the circuit board (2), wherein the switch wiring piece (11) is located between the insulating piece (12) and the normally connected wiring piece (10), and the position line of the insulating piece (12), the switch wiring piece (11) and the normally connected wiring piece (10) is parallel to the reciprocating direction of the speed regulating rod (5). When the external force does not act on the speed regulating button (4), one free end of the switch reed (7) contacts the surface of the normally connected wiring piece (10) and the other free end contacts the surface of the insulating piece (12). After the external force acts on the speed regulating button (4), the speed regulating rod (5) drives the two ends of the switch reed (7) to contact the circuit board (2 ) surface contacts and slides on the surface of the circuit board (2), one free end of the switch reed (7) slides on the surface of the normally connected wiring piece (10), and the other free end slides out from the surface of the insulating sheet (12) and slides into the switch wiring piece (11) through a portion of the circuit board (2) surface, thereby conducting the switch circuit connected between the normally connected wiring piece (10) and the switch wiring piece (11). After the external force disappears, the speed regulating rod (5) returns to its original position under the action of the return spring (6), and one free end of the switch reed (7) continues to slide on the surface of the normally connected wiring piece (10), and the other free end slides out from the surface of the switch wiring piece (11) and disconnects the switch circuit connected between the normally connected wiring piece (10) and the switch wiring piece (11), and then slides into the surface of the insulating sheet (12) through a portion of the circuit board (2) surface to complete the reset.

8. The reversing speed regulating switch according to claim 4, characterized in that: The wiring piece group includes a normally connected wiring piece (10) connected to the circuit, a switch wiring piece (11) connected to the circuit, and an insulating piece (12) fixed on the circuit board (2), wherein the switch wiring piece (11) is located between the insulating piece (12) and the normally connected wiring piece (10), and the position line of the insulating piece (12), the switch wiring piece (11) and the normally connected wiring piece (10) is parallel to the reciprocating direction of the speed regulating rod (5). When the external force does not act on the speed regulating button (4), one free end of the switch reed (7) contacts the surface of the normally connected wiring piece (10) and the other free end contacts the surface of the insulating piece (12). After the external force acts on the speed regulating button (4), the speed regulating rod (5) drives the two ends of the switch reed (7) to contact the circuit board (2 ) surface contacts and slides on the surface of the circuit board (2), one free end of the switch reed (7) slides on the surface of the normally connected wiring piece (10), and the other free end slides out from the surface of the insulating sheet (12) and slides into the switch wiring piece (11) through a portion of the circuit board (2) surface, thereby conducting the switch circuit connected between the normally connected wiring piece (10) and the switch wiring piece (11). After the external force disappears, the speed regulating rod (5) returns to its original position under the action of the return spring (6), and one free end of the switch reed (7) continues to slide on the surface of the normally connected wiring piece (10), and the other free end slides out from the surface of the switch wiring piece (11) and disconnects the switch circuit connected between the normally connected wiring piece (10) and the switch wiring piece (11), and then slides into the surface of the insulating sheet (12) through a portion of the circuit board (2) surface to complete the reset.

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