An anti-mis-touch brushless tool switch

Abstract

An anti-mis-touch brushless tool switch, comprising a switch housing 1 with a hollow interior, a circuit board 2, a pressure rod 3, and a driven push member 4. A compensation notch is formed through the circuit board 2. At least a pair of connection pieces are embedded on one side of the circuit board 2 facing the driven push member 4. The driven push member compensates for the compensation notch through a compensation surface. A tension spring is connected between the other side of the driven push member 4 and the side wall of the switch housing 1. A straight guide groove 4.12 and an inclined guide groove 4.11 are formed on the driven push member 4. A cylindrical ejector pin 4.13 is further provided in the inclined guide groove 4.11 and the straight guide groove 4.12. Part of the ejector pin is exposed outside the inclined guide groove 4.11 and the straight guide groove 4.12. The pressure rod 3 is provided with a linkage block 3.1. An ejector pin groove is formed on the linkage block 3.1 corresponding to the ejector pin 4.13. Part of the ejector pin 4.13 is embedded in the ejector pin groove. A reed 5 is provided between the linkage block 3.1 and the circuit board 2. The reed 5 includes a fixed part fixedly connected to the linkage block 3.1, a first free end and a second free end that can contact the connection piece. This design has the advantages of simple transmission mode and delicate structure.

Description

Technical Field

[0001] The invention relates to the field of switches, in particular to an anti-mistouch brushless tool switch. Background Art

[0002] The switch is one of the most commonly used parts in the motor industry. In the application process of the switch, the accidental touch of the switch during operation has always been a big problem. At the least, it will cause the equipment controlled by the switch to start by mistake, wasting energy and materials, and at the worst, it will cause the dangerous equipment to start by mistake and cause irreparable harm to people. Therefore, how to effectively design the switch to prevent accidental touch has become a difficult problem faced by today's switches. Although some existing switches can be designed to prevent accidental touch, there are still some defects. On the one hand, some switches use extremely complex parts and design schemes to prevent accidental touch, which necessarily increases the cost and also brings great difficulties to the subsequent maintenance and repair. At the same time, the application cost of the above switches is also high. On the other hand, the existing anti-accidental touch switches mostly use electromagnetic or circuits to prevent accidental touch of the switch. Although it is possible to achieve a relatively simple structure, it still needs to be connected to the circuit, which increases the application cost in disguise. At the same time, it is also relatively cumbersome in the application process, which is not conducive to the large-scale promotion and application of anti-accidental touch switches. Summary of the invention

[0003] The object of the present invention is to provide a brushless tool switch which has a simple transmission mode and a delicate structure and prevents accidental touching.

[0004] To solve the above technical problems, the present invention adopts the following technical solutions: An anti-misoperation brushless tool switch includes a switch housing with a hollow interior, a circuit board fixedly clamped inside the switch housing, a pressure rod extending into the switch housing and partially exposed outside the switch housing, and a driven push member provided inside the switch housing and having a complementary surface. A complementary notch is formed through the circuit board, and at least a pair of wiring pieces are embedded on the side of the circuit board facing the driven push member. The wiring pieces include a first wiring piece and a second wiring piece for accessing the circuit. The side of the driven push member with the complementary surface faces the circuit board, and the complementary notch is complemented through the complementary surface. A tension spring is connected between the other side of the driven push member and the side wall of the switch housing. A longitudinally arranged straight guide groove and an inclined guide groove communicating with the straight guide groove and arranged obliquely toward the tension spring side are formed on the driven push member. A cylindrical ejector pin is also provided in the inclined guide groove and the straight guide groove. The ejector pin slides in the inclined guide groove and the straight guide groove and is partially exposed outside the inclined guide groove and the straight guide groove. The driven push member is limited in the moving direction of the pressure rod by two limiting blocks fixedly provided inside the switch housing. A linkage block is fixedly provided at the end of the pressure rod extending into the switch housing, and a compression spring is used to make the pressure rod reciprocate inside the switch housing. A ejector pin groove is formed on the linkage block corresponding to the ejector pin, and the part of the ejector pin exposed outside the inclined guide groove and the straight guide groove is embedded in the ejector pin groove. A reed is provided between the linkage block and the circuit board at the position corresponding to each pair of wiring pieces. The reed includes a fixed part fixedly connected to the linkage block, a first free end in contact with the first wiring piece, and a second free end in contact with the second wiring piece. Under the action of an external force, the linkage block on the pressure rod reciprocates inside the switch housing to control the movement of the ejector pin in the inclined guide groove and the straight guide groove, thereby driving the movement of the driven push member and realizing the cooperation between the complementary surface and the complementary notch. At the same time, the linkage block drives the two free ends of the reed to slide on the circuit board. Finally, when the pressure rod is controlled by a misoperation action, the first free end of the reed cannot be connected to the switch after being clamped into the complementary notch from the first wiring piece. Under the control of a normal action, after the complementary surface complements the complementary notch, the first free end of the reed continues to slide on the first wiring piece to realize the connection of the switch.

[0005] Further, the driven push member provided inside the switch housing is in a "7" shape. The driven push member includes a longitudinally arranged matching part, a laterally arranged extending part, and a complementary block fixedly connected to the extending part and having a complementary surface. The extending part is located on one side of the matching part. A tension spring is connected between the other side of the matching part and the side wall of the switch housing. An extending matching opening and a complementary notch communicating with the extending matching opening are formed through the circuit board. The extending part passes through the extending matching opening, and the complementary block passes through the complementary notch and complements the complementary notch through the complementary surface.

[0006] Further, the first connection piece includes a wear-resistant insulation area and a connection area for accessing the circuit. The compensation notch is formed in the wear-resistant insulation area. When the second connection piece accesses the circuit and the linkage block drives the two free ends of the reed to slide on the circuit board, the first free end slides from the wear-resistant insulation area to the connection area, and the switch circuit is turned on. When the first free end retracts from the connection area to the wear-resistant insulation area, the switch circuit is turned off.

[0007] Further, the first connection piece and the second connection piece are respectively provided with a wear-resistant insulation area and a connection area for accessing the circuit. The compensation notch is formed in the wear-resistant insulation area of the first connection piece. When the linkage block drives the two free ends of the reed to slide on the circuit board, the first free end and the second free end slide from the wear-resistant insulation area to the connection area, and the switch circuit is turned on. When the first free end and the second free end retract from the connection area to the wear-resistant insulation area, the switch circuit is turned off.

[0008] Further, the inclined guide groove is a straight inclined groove communicating with the straight guide groove.

[0009] Further, the inclined guide groove is an arc-shaped inclined groove.

[0010] The beneficial effects of the present invention are as follows: Through the linkage cooperation between the compensation notch formed on the circuit board and the driven push piece with a compensation surface, when a misoperation acts on the pressure rod, the first free end of the reed enters the compensation notch and the switch circuit cannot be turned on, realizing the anti-misoperation design of the overall switch. Under continuous external force application, after the compensation surface compensates for the compensation notch, the first free end of the reed continues to slide on the first connection piece to turn on the switch circuit and complete the opening of the overall switch. Compared with the existing anti-misoperation switch design schemes, the technical solution adopted by the present invention uses very few components, the transmission is simpler and more direct, and the anti-misoperation design of double-checking the force application is relatively more delicate. It reduces the application of a large number of complex components in the existing anti-misoperation switches, and no longer adopts the existing electromagnetic or pure circuit anti-misoperation designs that are widely used. It reduces the application of electromagnetic circuits and pure circuits, greatly reducing the application cost while enhancing the safety of the switch during use, reducing the possible dangers caused by the switch being wrongly closed due to misoperation, and enhancing the safety of the equipment using the switch during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is an overall structural schematic diagram of an anti-misoperation brushless tool switch.

[0012] Figure 2 is an internal structural schematic diagram of the anti-misoperation brushless tool switch after removing part of the switch housing and some components.

[0013] Figure 3 is a schematic diagram of the cooperation between the reed and the circuit board.

[0014] Figure 4 It is a schematic diagram of the cooperation between the reed and the circuit board when the anti-misoperation brushless tool switch is in the off state.

[0015] Figure 5 It is a schematic diagram of the cooperation between the reed and the circuit board when the anti-misoperation brushless tool switch is in the closed state. Specific embodiments

[0016] In order to make the technical means, innovative features and functions achieved by the present invention easy to understand, the present invention will be further described below.

[0017] As Figures 1-5 shown, the technical solution of the anti-misoperation brushless tool switch of the present invention includes a switch housing 1 with a hollow interior, a circuit board 2 fixedly clamped in the switch housing 1, a pressure rod 3 extending into the switch housing 1 and partially exposed outside the switch housing 1, and a driven push member 4 provided in the switch housing 1 and having a complementary surface. A complementary notch is formed through the circuit board 2, and at least a pair of wiring pieces are embedded on one side of the circuit board 2 facing the driven push member 4. The wiring pieces include a first wiring piece and a second wiring piece for accessing the circuit. The side of the driven push member 4 with the complementary surface faces the circuit board 2 and fills the complementary notch through the complementary surface. A tension spring is connected between the other side of the driven push member 4 and the side wall of the switch housing 1. A longitudinally arranged straight guide groove 4.12 and an inclined guide groove 4.11 communicating with the straight guide groove 4.12 and arranged obliquely toward the tension spring side are formed on the driven push member 4. A cylindrical ejector pin 4.13 is also provided in the inclined guide groove 4.11 and the straight guide groove 4.12. The ejector pin 4.13 slides in the inclined guide groove 4.11 and the straight guide groove 4.12 and is partially exposed outside the inclined guide groove 4.11 and the straight guide groove 4.12. The driven push member 4 is limited in the moving direction of the pressure rod 3 by two limit blocks fixedly provided in the switch housing 1. One end of the pressure rod 3 extending into the switch housing 1 is fixedly provided with a linkage block 3.1, and the pressure rod 3 reciprocates in the switch housing 1 through a compression spring. A ejector pin groove is formed on the linkage block 3.1 corresponding to the ejector pin 4.13, and the part of the ejector pin 4.13 exposed outside the inclined guide groove 4.11 and the straight guide groove 4.12 is embedded in the ejector pin groove. A reed 5 is provided between the linkage block 3.1 and the circuit board 2 at the position corresponding to each pair of wiring pieces. The reed 5 includes a fixed part fixedly connected to the linkage block 3.1, a first free end in contact with the first wiring piece, and a second free end in contact with the second wiring piece.

[0018] Under the action of an external force, the linkage block 3.1 on the compression rod 3 reciprocates within the switch housing 1 to control the ejector pin 4.13 to move from the inclined guide groove 4.11 into the straight guide groove 4.12, thereby driving the driven pusher 4 to move and realizing the cooperation between the complementary surface and the complementary notch. At the same time, the linkage block 3.1 drives the two free ends of the reed 5 to slide on the circuit board 2. Finally, under the control of the misoperation of the compression rod 3, the first free end of the reed 5 is inserted into the complementary notch from the first terminal piece and cannot connect the switch. Under the control of normal operation, that is, after the first free end is inserted into the complementary notch and an external force is continuously applied, the complementary surface fills the complementary notch, and then the first free end of the reed 5 continues to slide on the first terminal piece to realize the connection of the switch. After the external force disappears, the linkage block 3.1 on the compression rod 3 retracts along the original movement route within the switch housing 1 and controls the ejector pin 4.13 to move from the straight guide groove 4.12 into the inclined guide groove 4.11. After the first free end of the reed 5 passes through the complementary notch, the movement of the driven pusher 4 drives the separation of the complementary surface and the complementary notch, realizing the disconnection of the switch circuit. In this technical solution, the inclined guide groove 4.11 is a straight inclined groove or an arc-shaped inclined groove communicating with the straight guide groove 4.12. In actual application, in order to make the guiding of the ejector pin 4.13 smoother during movement, an arc-shaped transition groove can be additionally provided between the inclined guide groove 4.11 and the straight guide groove 4.12.

[0019] In an embodiment of the present invention, the driven pusher 4 provided within the switch housing 1 is in a "7" shape. The driven pusher 4 includes a longitudinally arranged matching portion 4.1, a laterally arranged extending portion 4.2, and a complementary block 4.3 fixedly connected to the extending portion 4.2 and having a complementary surface. The extending portion 4.2 is located on one side of the matching portion 4.1. A tension spring is connected between the other side of the matching portion 4.1 and the side wall of the switch housing 1. An extending matching opening and a complementary notch communicating with the extending matching opening are formed through the circuit board 2. The extending portion 4.2 passes through the extending matching opening, and the complementary block 4.3 passes through the complementary notch and fills the complementary notch through the complementary surface. The design that the extending portion 4.2 of the driven pusher 4 passes through the extending matching opening limits the movement direction of the driven pusher 4 and at the same time avoids the irregular shaking of the driven pusher 4, ensuring that the complementary surface on the complementary block 4.3 can accurately perform the linkage cooperation with the complementary notch, and avoiding the problem that the complementary surface and the complementary notch cannot perform the cooperation action due to the misalignment of the complementary surface and the complementary notch.

[0020] In the actual application process, due to the friction between the first free end of the reed 5 and the wiring piece, dust generated by the friction during long-term operation is likely to accumulate and stay, which may easily mislead the conduction between the first free end stuck in the compensation notch and the wiring piece, resulting in the failure of the anti-misoperation function of the switch. Therefore, in order to completely eliminate the above problems and improve the service life of the switch, in an embodiment of the present invention, the first wiring piece includes a wear-resistant insulating area and a wiring area for accessing the circuit. The compensation notch is opened on the wear-resistant insulating area. When the linkage block 3.1 drives the two free ends of the reed 5 to slide on the circuit board 2, the first free end slides from the wear-resistant insulating area to the wiring area, and the switch circuit is turned on. When the first free end retracts from the wiring area to the wear-resistant insulating area, the switch circuit is turned off. Similarly, the second free end of the reed 5 also has the need to prevent mis-conduction as the first free end. In another embodiment of the present invention, the first wiring piece and the second wiring piece are respectively provided with a wear-resistant insulating area and a wiring area for accessing the circuit. The compensation notch is opened on the wear-resistant insulating area of the first wiring piece. When the linkage block 3.1 drives the two free ends of the reed 5 to slide on the circuit board 2, the first free end and the second free end slide from the wear-resistant insulating area to the wiring area, and the switch circuit is turned on. When the first free end and the second free end retract from the wiring area to the wear-resistant insulating area, the switch circuit is turned off.

[0021] Although the present invention has been disclosed above with specific embodiments, it is not intended to limit the present invention. Any person skilled in the art can still make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be determined by the scope defined in the appended claims.

Claims

1. An anti-mis-touch brushless tool switch, characterized in that: it includes a switch housing (1) with a hollow interior, a circuit board (2) fixedly clamped inside the switch housing (1), a pressure rod (3) extending into the switch housing (1) and partially exposed outside the switch housing (1), and a driven push member (4) provided inside the switch housing (1) and having a complementary surface. A complementary notch is formed through the circuit board (2). At least a pair of wiring pieces are embedded on one side of the circuit board (2) facing the driven push member (4). The wiring pieces include a first wiring piece and a second wiring piece for accessing the circuit. The side of the driven push member (4) with the complementary surface faces the circuit board (2) and fills the complementary notch through the complementary surface. A tension spring is connected between the other side of the driven push member (4) and the side wall of the switch housing (1). A longitudinally arranged straight guide groove (4.12) and an inclined guide groove (4.11) communicating with the straight guide groove (4.12) and arranged obliquely toward the side of the tension spring are formed on the driven push member (4). A cylindrical ejector pin (4.13) is also provided in the inclined guide groove (4.11) and the straight guide groove (4.12). The ejector pin (4.13) slides in the inclined guide groove (4.11) and the straight guide groove (4.12) and is partially exposed outside the inclined guide groove (4.11) and the straight guide groove (4.12). The driven push member (4) is limited in the moving direction of the pressure rod (3) by two limit blocks fixedly provided inside the switch housing (1). One end of the pressure rod (3) extending into the switch housing (1) is fixedly provided with a linkage block (3.1), and a compression spring is used to make the pressure rod (3) reciprocate inside the switch housing (1). An ejector pin groove is formed on the linkage block (3.1) corresponding to the ejector pin (4.13). The part of the ejector pin (4.13) exposed outside the inclined guide groove (4.11) and the straight guide groove (4.12) is embedded in the ejector pin groove. A reed (5) is provided between the linkage block (3.1) and the circuit board (2) at the position corresponding to each pair of wiring pieces. The reed (5) includes a fixed part fixedly connected to the linkage block (3.1), a first free end in contact with the first wiring piece, and a second free end in contact with the second wiring piece. Under the action of an external force, the linkage block (3.1) on the pressure rod (3) reciprocates inside the switch housing (1) to control the movement of the ejector pin (4.13) in the inclined guide groove (4.11) and the straight guide groove (4.12), thereby driving the movement of the driven push member (4) and realizing the cooperation between the complementary surface and the complementary notch. At the same time, the linkage block (3.1) drives the two free ends of the reed (5) to slide on the circuit board (2). Finally, under the control of a mis-touch action of the pressure rod (3), the first free end of the reed (5) cannot be connected to the switch by being stuck into the complementary notch from the first wiring piece. Under the control of a normal action, that is, after the first free end is stuck into the complementary notch and an external force is continuously applied, after the complementary surface fills the complementary notch, the first free end of the reed (5) continues to slide on the first wiring piece to realize the connection of the switch.

2. The anti-mis-touch brushless tool switch according to claim 1, characterized in that: The driven push member (4) disposed inside the switch housing (1) is in a "7" shape. The driven push member (4) includes a longitudinally arranged mating portion (4.1), a laterally arranged extension portion (4.2), and a compensation block (4.3) fixedly connected to the extension portion (4.2) and having a compensation surface. The extension portion (4.2) is located on one side of the mating portion (4.1). A tension spring is connected between the other side of the mating portion (4.1) and the side wall of the switch housing (1). An extension mating opening and a compensation notch communicating with the extension mating opening are formed through the circuit board (2). The extension portion (4.2) passes through the extension mating opening, and the compensation block (4.3) passes through the compensation notch and compensates the compensation notch through the compensation surface.

3. The anti-misoperation brushless tool switch according to claim 1 or 2, characterized in that: The first wiring piece includes a wear-resistant insulation area and a wiring area for accessing the circuit. The compensation notch is formed in the wear-resistant insulation area. When the second wiring piece accesses the circuit and the linkage block (3.1) drives the two free ends of the reed (5) to slide on the circuit board (2), the first free end slides from the wear-resistant insulation area to the wiring area, and the switch circuit is turned on. When the first free end retracts from the wiring area to the wear-resistant insulation area, the switch circuit is turned off.

4. The anti-misoperation brushless tool switch according to claim 1 or 2, characterized in that: The first wiring piece and the second wiring piece are respectively provided with a wear-resistant insulation area and a wiring area for accessing the circuit. The compensation notch is formed in the wear-resistant insulation area of the first wiring piece. When the linkage block (3.1) drives the two free ends of the reed (5) to slide on the circuit board (2), the first free end and the second free end slide from the wear-resistant insulation area to the wiring area, and the switch circuit is turned on. When the first free end and the second free end retract from the wiring area to the wear-resistant insulation area, the switch circuit is turned off.

5. The anti-misoperation brushless tool switch according to claim 1 or 2, characterized in that: The inclined guide groove (4.11) is a straight inclined groove communicating with the straight guide groove (4.12).

6. The anti-misoperation brushless tool switch according to claim 3, characterized in that: The inclined guide groove (4.11) is a straight inclined groove communicating with the straight guide groove (4.12).

7. The anti-misoperation brushless tool switch according to claim 4, characterized in that: The inclined guide groove (4.11) is a straight inclined groove communicating with the straight guide groove (4.12).

8. The anti-misoperation brushless tool switch according to claim 1 or 2, characterized in that: The inclined guide groove (4.11) is an arc-shaped inclined groove.

9. The anti-misoperation brushless tool switch according to claim 3, characterized in that: The inclined guide groove (4.11) is an arc-shaped inclined groove.

10. The anti-misoperation brushless tool switch according to claim 4, characterized in that: The inclined guide groove (4.11) is an arc-shaped inclined groove.

Images