CN210325597U

CN210325597U - Compact DC brushless signal switch

Info

Publication number: CN210325597U
Application number: CN201921836879.8U
Authority: CN
Inventors: 储云跃; 袁成年
Original assignee: CHANGZHOU YUNJIE ELECTRIC CO L
Current assignee: CHANGZHOU YUNJIE ELECTRIC CO L
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-04-14
Anticipated expiration: 2029-10-29

Abstract

The utility model relates to the technical field of direct current trigger switches, in particular to a compact direct current brushless signal switch, which comprises a hollow shell and an upper cover, wherein a first movable groove and a second movable groove are arranged in the shell, a movable contact frame is arranged in the first movable groove, a slide bar is clamped in the movable contact frame, a double-layer sealing ring is arranged between the slide bar and the movable contact frame, a conduction elastic piece and a speed regulation elastic piece are arranged on the movable contact frame, a reset spring is arranged between the movable contact frame and the shell, a reversing block and a reversing steel sheet are arranged in the second movable groove, the reversing block is connected with a reversing bar, the reversing block is also provided with a reversing elastic piece, a circuit board is also arranged in the shell, the top surface of the circuit board is provided with a welding disk, an output wire harness is welded on the welding disk, the bottom surface of the circuit board is provided with three conduction signal belts, the size of the, the dustproof device is convenient for operators to operate, has certain dustproof performance, high practicability and long service life.

Description

Compact DC brushless signal switch

Technical Field

The utility model relates to a direct current trigger switch technical field, concretely relates to compact direct current brushless signal switch.

Background

Brushless dc power tools in the market are generally implemented by a scheme in which a dc signal switch is additionally provided with a control module to control a dc brushless motor.

1. The switch is mostly designed and installed at the position of a handle held by a tool, and because the switch on the market at present has a larger appearance due to the design structure, the installation position of the switch is required to be larger, so that the handle held by the electric tool is needed to be stout. Thick appearance is unfavorable for the operation of actual use people, causes the fatigue of staff easily, and the work experience is also uncomfortable, still can cause under the individual condition to grip, and the risk that the machine dropped has the risk of pounding other people or oneself. For people with small palms, the larger grip may cause the situation that the user cannot normally use the device, such as the device cannot be started after holding the device with hands.

2. Because the tools are worn and can be consumed in large quantity, the tools need to be produced in large quantity, and the matched switches need to be produced in batch, so that the components used by the switches are required to be simple in structure, convenient to manufacture and small in quantity and convenient to assemble under the condition of realizing functions. At present, switches on the market are more and more complex, the number of used parts is more, and some parts are strange and are not beneficial to controlling the production quality.

3. Due to the fact that the using environment of the tool is varied, different places, especially places with more dust, need to be opened and closed with better dustproof effect. Usually, the sealing ring is mounted at the sliding motion part, but because the sealing ring is directly mounted on the plastic sliding rod, the rubber sealing ring inevitably has larger friction with the sliding rod due to the surface smoothness problem of the plastic. Long-term friction is bound to cause early failure of the sealing ring, and the switch is ash-fed, so that the use is influenced.

SUMMERY OF THE UTILITY MODEL

To exist not enough among the prior art, the utility model provides a compact direct current brushless signal switch, the technical problem that solve is how to improve the holistic structural configuration of direct current brushless signal switch, makes its use that can make things convenient for operating personnel, and the part is simple, is convenient for make, and has certain dustproof performance, and practicality is strong, long service life.

In order to solve the technical problem, the utility model provides a technical scheme is: the compact direct-current brushless signal switch comprises a hollow shell and an upper cover, wherein the upper cover covers the shell to form a closed structure, a first movable groove and a second movable groove which are parallel to each other are formed in the shell, a movable contact frame is arranged in the first movable groove, a sliding rod is clamped in the movable contact frame, a double-layer sealing ring is arranged between the sliding rod and the movable contact frame, the sealing ring is of a thin-edge structure, one end of the sliding rod is positioned in the movable contact frame, the other end of the sliding rod is fixedly connected with a trigger, and the trigger is positioned outside the shell;

the movable contact frame is provided with a conduction elastic sheet and a speed regulation elastic sheet, a return spring is arranged between the movable contact frame and the shell, and the telescopic direction of the return spring is parallel to the moving direction of the sliding rod;

a reversing block and a reversing steel sheet are arranged in the second movable groove, the reversing block is fixedly connected with a reversing rod, one end of the reversing rod is connected with the reversing steel sheet, a reversing convex block is arranged on the reversing block, a reversing groove matched with the reversing convex block is correspondingly formed in the reversing rod, the reversing convex block is clamped in the reversing groove to form a cam mechanism, the moving direction of the reversing block is parallel to the moving direction of the slide rod, and a reversing elastic sheet is also arranged on the reversing block;

the top that switches on shell fragment, speed governing shell fragment and switching-over shell fragment is provided with the circuit board, and the top surface of circuit board is provided with the welding dish, and the welding dish is connected with the output pencil, and the output pencil is located the outside of casing, and the external complete machine control circuit board of output pencil, the bottom surface of circuit board are provided with three and switch on the signal area, and three switches on the signal area and meet with switching on shell fragment, speed governing shell fragment and switching-over shell fragment respectively.

Furthermore, the three conduction signal bands are respectively a conduction band, a speed regulation band and a reversing signal band, the conduction band is connected with the conduction elastic sheet, the speed regulation band is connected with the speed regulation elastic sheet, and the reversing signal band is connected with the reversing elastic sheet.

Furthermore, the reversing steel sheet is concave-convex and elastic.

Furthermore, a third groove is formed in the movable contact frame, a convex round table is formed at one end of the sliding rod, and the convex round table is clamped in the third groove.

The beneficial effect that this technical scheme brought is: the double-layer sealing ring structure design with the thin-edge structure enables the sealing ring to tightly hold the sliding rod as much as possible, so that the possibility that dust or water vapor enters the shell and the switch from the sliding part is reduced, and meanwhile, a cavity structure can be formed on the inner side surface of the double sealing ring for storing a certain amount of lubricating oil, so that the friction between the sealing ring and the sliding rod is reduced, the service life of the switch is prolonged, and the overall stability is improved; the conducting elastic sheet and the speed regulating elastic sheet which are arranged in parallel can ensure consistent stability, prevent signal transmission and errors in cooperation, save the volume of the shell and facilitate the control of an operator on the distance; the reversing steel sheet is concave-convex and has elasticity, so that the reversing rod can be fixed at different positions after reversing, namely shifting, the reversing rod can be prevented from vibrating and shifting when the whole machine is used, and the shifting is transmitted to the reversing block, and finally the switch reversing control signal is unstable; finally, the sliding rod and the movable contact frame are in a soft connection state through the design that the convex circular platform is clamped in the third groove, so that when the trigger is pressed, even if irregular pressing actions such as left-right deflection and the like occur, the trigger can be transmitted to the movable contact frame as little as possible, and the trigger is reflected on the elastic sheet as little as possible, so that the circuit board obtains stable position signals.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic diagram of an explosion structure of a compact dc brushless signal switch according to an embodiment of the present invention;

fig. 2 is a schematic view of the installation of the internal structure of the compact dc brushless signal switch according to the present invention in the housing;

fig. 3 is a schematic view of an installation structure of a commutation steel sheet and a commutation rod of the compact dc brushless signal switch according to an embodiment of the present invention;

fig. 4 is a schematic view of an installation structure of a third groove and a sliding rod of the compact dc brushless signal switch according to an embodiment of the present invention;

fig. 5 is a schematic view of an installation structure of the elastic piece and the conduction signal band of the compact dc brushless signal switch according to the embodiment of the present invention;

fig. 6 is a schematic view of an overall installation structure of the compact dc brushless signal switch according to the embodiment of the present invention;

in the figure: 1-shell, 11-first movable groove, 111-movable contact frame, 112-reset spring, 1111-sliding rod, 1112-sealing ring, 1113-conduction elastic sheet, 1114-speed regulation elastic sheet, 1115-third groove, 1116-boss table, 12-second movable groove, 121-reversing block, 1211-reversing bump, 1212-reversing elastic sheet, 122-reversing steel sheet, 123-reversing rod, 1231-reversing groove, 2-upper cover, 3-trigger, 4-circuit board, 41-welding disc, 42-output wiring harness, 43-conduction signal band, 431-conduction band, 432-speed regulation band and 433-reversing signal band.

Detailed Description

The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and it should be understood that the preferred embodiments are described herein for purposes of illustration and explanation, and not limitation.

As shown in fig. 1 to 6, the compact dc brushless signal switch includes a hollow housing 1 and an upper cover 2, the upper cover 2 covers the housing 1 so that the whole can form a closed structure, a first movable groove 11 and a second movable groove 12 which are parallel to each other are formed in the housing 1, and the parallel design can make the subsequent installation more convenient and labor-saving, without spending more design time.

The movable contact frame 111 is arranged in the first movable groove 11, the sliding rod 1111 is arranged in the movable contact frame 111 in a clamping mode, the double-layer sealing ring 1112 is further arranged between the sliding rod 1111 and the movable contact frame 111, and in addition, the two sealing rings 1112 are of a thin edge structure, so that the sliding rod 1111 can be held tightly by the sealing rings 1112 as far as possible by utilizing the characteristic of changeability of the thin edge, and the possibility that dust or water vapor enters the shell 1 and the inside of the switch from the sliding part is reduced. Meanwhile, the inner side surface of the double sealing ring 1112 can form a cavity structure for storing a certain amount of lubricating oil, so that the friction between the sealing ring 1112 and the sliding rod 1111 is reduced, the service life of the switch is prolonged, and the integral use stability performance is improved. The sliding rod 1111 is also made of a metal material, so that the surface of the sliding rod 1111 can be easily subjected to high-finish treatment, thereby further reducing the friction coefficient with the sealing ring 1112, and achieving the above effects. One end of the sliding rod 1111 is located in the moving contact frame 111, and the other end is fixedly connected with a trigger 3, and the trigger 3 is located outside the housing 1, so that the moving contact frame 111 can be moved by moving the trigger 3.

The movable contact frame 111 is provided with a conducting spring 1113 and a speed regulating spring 1114 which are arranged in parallel and have the same moving direction. Still be provided with reset spring 112 between movable contact frame 111 and casing 1, the flexible direction of this reset spring 112 is parallel with the moving direction of slide bar 1111, can make through removing movable contact frame 111 like this, switch on shell fragment 1113 and speed governing shell fragment 1114 and reset spring 112 all can move to the same direction, reset spring 112 can play the effect of restriction to movable contact frame 111 again, and after exerting the external force that makes its removal to movable contact frame 111 and disappeared, reset spring 112 can make movable contact frame 111 return to the normal position according to self elasticity, and make simultaneously switch on shell fragment 1113 and speed governing shell fragment 1114 and get back to the normal position.

The second movable slot 12 is internally provided with a reversing block 121 and a reversing steel sheet 122, wherein the reversing block 121 is fixedly connected with a reversing rod 123, one end of the reversing rod 123 is connected with the reversing steel sheet 122, the reversing block 121 is provided with a reversing bump 1211, the reversing rod 123 is correspondingly provided with a reversing groove 1231 matched with the reversing bump 1211, the reversing bump 1211 is clamped in the reversing groove 1231 to form a cam mechanism, so that the reversing block 121 can be driven to move in the second movable slot 12 through the cam mechanism by rotating the reversing rod 123, the moving direction of the reversing block 121 is parallel to that of the sliding rod 1111, and the reversing elastic sheet 1212 is further arranged on the reversing block 121, so that the moving directions of the reversing elastic sheet 1212, the conducting elastic sheet 1113 and the speed regulating elastic sheet 1114 are the same. Meanwhile, although the two movable grooves are respectively arranged, the reversing elastic sheet 1212, the conducting elastic sheet 1113 and the speed regulation elastic sheet 1114 are basically three elastic sheets with the same size and adjacently arranged in an array, so that the size of the shell 1 can be saved, and the distance can be conveniently controlled by an operator.

The circuit board 4 is arranged above the conduction elastic sheet 1113, the speed regulation elastic sheet 1114 and the reversing elastic sheet 1212, the welding disc 41 is arranged on the top surface of the circuit board 4, the welding disc 14 is connected with the output wiring harness 42, and the output wiring harness 42 is located outside the shell 1. The external complete machine control circuit board of output pencil 42, the bottom surface of circuit board 4 is provided with three and switches on signal area 43, and three signal area 43 that switches on meets with switching on shell fragment 1113, speed governing shell fragment 1114 and switching-over shell fragment 1212 respectively, can make like this through moving touch panel 111, can drive when switching on shell fragment 113 and the removal of speed governing shell fragment 1114, and it can send corresponding signal to switching on signal area 43 through removing, finally makes output pencil 42 output signal in order to control the machine. The same principle of operation is applied to the commutation spring 1212.

In this embodiment, the three conducting signal bands 43 are respectively a conducting band 431, a speed adjusting band 432 and a reversing signal band 433, the conducting band 431 is connected with the conducting spring 1113, the speed adjusting band 432 is connected with the speed adjusting spring 1114, the reversing signal band 433 is connected with the reversing spring 1212, the conducting band 431 is used for conducting a circuit, the speed adjusting band 432 is used for controlling the rotation speed of the machine, and the reversing signal band 433 is used for controlling the forward rotation and the reverse rotation of the machine.

In the embodiment, the commutation steel sheet 122 is concave-convex and has elasticity, so that the commutation rod 123 can be fixed at different positions after commutation, i.e. rotation, and can be limited to be only located in three gears, namely left, middle and right, in order to prevent the commutation rod 123 from vibrating and shifting when the whole machine is in use, and transfer the shift to the commutation block 121, which finally causes instability of a commutation control signal of a switch.

In this embodiment, a third groove 1115 is formed in the movable contact holder 111, a convex circular platform 1116 is formed at one end of the sliding rod 1111, and the convex circular platform 1116 is engaged with the third groove 1115, so that the sliding rod 1111 and the movable contact holder 111 are in a soft connection state, and when the trigger 3 is pressed, even if irregular pressing actions such as left-right deflection occur, the irregular pressing actions can be transmitted to the movable contact holder 111 as little as possible, so that the irregular pressing actions can be reflected on the elastic sheet as little as possible, and the circuit board 4 can obtain stable position signals.

The utility model discloses compact direct current brushless signal switch's installation step is as follows:

the double-layer seal ring 1112 is mounted on the sliding rod 1111, then the movable contact holder 111 is clamped on the convex circular platform 1116 of the sliding rod 1111, and then the movable contact holder is integrally mounted in the first movable groove 11 of the housing 1. The reset spring 112 is installed at the tail of the moving contact frame 111, then the conducting elastic sheet 1113 and the speed regulating elastic sheet 1114 are installed in the groove on the top surface of the moving contact frame 111, and finally the trigger 3 is installed at the other end of the sliding rod 1111 to be fixedly connected. Then, the reversing steel sheet 122, the reversing rod 123 and the reversing block 121 are installed in the second movable slot 12 of the housing 1, one end of the reversing rod 123 is abutted against the reversing steel sheet 122, the reversing elastic piece 1212 is installed on the upper end surface of the reversing block 121, and the reversing projection 1211 is clamped in the reversing groove 1231, so that the reversing block 121 and the reversing rod 123 are rotatably connected to form a cam mechanism. Then, the circuit board 4 is mounted on the housing 1 with the front surface facing upward, the three conducting signal belts 43 of the circuit board 4 sequentially correspond to the three spring pieces and are connected, and the circuit board 4 is provided with via holes for transmitting position signals of the three spring pieces to the output wiring harness 42 on the front surface.

The utility model discloses compact direct current brushless signal switch's theory of operation as follows:

the trigger 3 is pressed inwards, the sliding rod 1111 moves inwards simultaneously under the linkage action of the trigger 3, so that the movable contact frame 111 is driven to move inwards, the conducting elastic sheet 1113 and the speed regulating elastic sheet 1114 which are installed on the movable contact frame 111 are further driven to move inwards, the conducting elastic sheet 1113 is communicated with the conducting belt 431 and the speed regulating elastic sheet 1114 is communicated with the speed regulating belt 432, and therefore the conducting elastic sheet 1113 can conduct a circuit on the conducting belt 431 after the movable contact frame 111 moves for a certain distance, a signal for starting and conducting the machine is given out, the speed regulating elastic sheet 1114 slides on the speed regulating belt 432, the speed regulating belt 432 is a potentiometer with a resistance belt, and therefore different conducting resistance signals are given out due to different positions of the speed regulating elastic sheet 1114 at this time, and the rotating speed of the machine is controlled. When the trigger 3 is pressed to the bottom, the conducting elastic sheet 1113 and the speed regulating elastic sheet 1114 are both at the maximum position, and at this time, the machine is at the maximum rotating speed.

When the trigger 3 is released, the movable contact frame 111 is subjected to the elastic force of the return spring 112 to move outwards, and simultaneously drives the conducting elastic sheet 1113 and the speed regulating elastic sheet 1114 to move outwards together, so that a speed regulating signal opposite to that in the inward movement is given, and meanwhile, the conducting elastic sheets 1113 give continuous conducting signals in the pressing and releasing processes of the trigger 3. When the trigger 3 is released to a certain distance and the complete release is finished, the conducting elastic sheet 1113 gives a signal that the complete machine stops rotating when the switch is powered off, and the specific position can be set by adjusting the position of the conducting band 431 on the circuit board 4.

The reversing rod 123 can be switched among a left gear, a middle gear and a right gear, so that the switch can give different signals, and the forward rotation or the reverse rotation of the whole machine can be controlled. When the reversing rod 123 is shifted, the reversing bump 1211 on the reversing block 121 and the reversing groove 1231 on the reversing rod 123 form a cam mechanism, so the reversing block 121 can move left and right, and the reversing elastic piece 1212 is mounted on the reversing block 121, so the reversing elastic piece 1212 can also move left and right along with the reversing elastic piece 1212, meanwhile, the reversing elastic piece 1212 is connected with the reversing signal strip 433 on the circuit board 4, the reversing signal strip 433 has different conducting signal positions, and the reversing elastic piece 1212 moving left and right is conducted to different signal positions, so that the switch can give different signals of forward rotation or reverse rotation of the machine.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Compact direct current brushless signal switch, its characterized in that: the device comprises a hollow shell (1) and an upper cover (2), wherein the upper cover (2) covers the shell (1) to form a closed structure, a first movable groove (11) and a second movable groove (12) which are parallel to each other are formed in the shell (1), a movable contact frame (111) is arranged in the first movable groove (11), a sliding rod (1111) is clamped in the movable contact frame (111), a double-layer sealing ring (1112) is arranged between the sliding rod (1111) and the movable contact frame (111), the sealing ring (1112) is of a thin edge structure, one end of the sliding rod (1111) is located in the movable contact frame (111), the other end of the sliding rod (1111) is fixedly connected with a trigger (3), and the trigger (3) is located outside the shell (1);

a conduction elastic sheet (1113) and a speed regulation elastic sheet (1114) are arranged on the movable contact frame (111), a return spring (112) is arranged between the movable contact frame (111) and the shell (1), and the telescopic direction of the return spring (112) is parallel to the moving direction of the sliding rod (1111);

a reversing block (121) and a reversing steel sheet (122) are arranged in the second movable groove (12), the reversing block (121) is fixedly connected with a reversing rod (123), one end of the reversing rod (123) is connected with the reversing steel sheet (122), a reversing lug (1211) is arranged on the reversing block (121), a reversing groove (1231) matched with the reversing lug (1211) is correspondingly formed in the reversing rod (123), the reversing lug (1211) is clamped in the reversing groove (1231) to form a cam mechanism, the moving direction of the reversing block (121) is parallel to the moving direction of the sliding rod (1111), and a reversing elastic sheet (1212) is further arranged on the reversing block (121);

switch on shell fragment (1113), speed governing shell fragment (1114) and the top of switching-over shell fragment (1212) is provided with circuit board (4), the top surface of circuit board (4) is provided with bonding pad (41), bonding pad (41) are connected with output pencil (42), output pencil (42) are located the outside of casing (1), the external complete machine control circuit board of output pencil (42), the bottom surface of circuit board (4) is provided with three signal area (43) that switches on, and is three switch on signal area (43) respectively with switch on shell fragment (1113), speed governing shell fragment (1114) and switching-over shell fragment (1212) meet.

2. The compact dc brushless signal switch of claim 1, wherein: the three conducting signal bands (43) are respectively a conducting band (431), a speed regulating band (432) and a reversing signal band (433), the conducting band (431) is connected with the conducting elastic sheet (1113), the speed regulating band (432) is connected with the speed regulating elastic sheet (1114), and the reversing signal band (433) is connected with the reversing elastic sheet (1212).

3. The compact dc brushless signal switch of claim 1, wherein: the reversing steel sheet (122) is concave-convex and elastic.

4. The compact dc brushless signal switch of claim 1, wherein: a third groove (1115) is formed in the movable contact frame (111), a boss (1116) is formed at one end of the sliding rod (1111), and the boss (1116) is clamped in the third groove (1115).