Miniature direct current brushless signal switch providing multidirectional wiring

Abstract

A reversing rotating core is installed in an upper cover through a reversing spring, a moving contact frame is installed in a base through a main spring, an electric brush is installed on the moving contact frame, a PCB is installed on the base, a circuit of the PCB is connected with the electric brush, the PCB is connected with a wire harness, and the wire harness is connected with a power supply. The upper cover and the base are connected and fixed, the wire harness can penetrate out of the outer sides of the upper cover and the base, the shell is improved, and the purpose of three different wire outlet positions can be achieved by replacing inserts in the same mold. The structure is optimized, so that the design of the switch main body is relatively compact, each spatial position is reasonably utilized, and the whole switch is relatively small and exquisite.

Description

Technical Field

[0001] The utility model relates to the technical field of switch equipment, in particular to a miniature DC brushless signal switch providing multi-directional wiring. Background Art

[0002] Some signal switches currently on the market have fixed wire outlet positions, and the same appearance cannot be adapted to most power tools. At the same time, the overall switch is relatively large, which limits the design of the shape and size of the handle of the entire machine. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] In order to overcome the shortcomings of the prior art, a miniature DC brushless signal switch providing multi-directional wiring is proposed to solve the problems raised in the above background technology.

[0005] (II) Technical solution

[0006] The utility model is realized through the following technical scheme: the utility model proposes a miniature DC brushless signal switch providing multi-directional wiring, comprising a commutation core, a moving contact frame and a PCB board, the commutation core is installed in an upper cover through a commutation spring, the moving contact frame is installed in a base through a main spring, a brush is installed on the moving contact frame, the PCB board is installed on the base, and the circuit belt of the PCB board is connected to the brush, a wiring harness is connected on the PCB board, the upper cover is connected and fixed to the base, and the wiring harness can pass through the outer sides of the upper cover and the base.

[0007] Furthermore, a reversing cover is arranged on the top of the upper cover, and the reversing cover is fixed to the reversing rotating core by bolts.

[0008] Furthermore, a through hole is arranged on the reversing rotor, the reversing spring is passed through the through hole, a plurality of arc grooves are arranged in an annular shape on the inner wall of the upper cover, steel balls are connected to both ends of the reversing spring, and the steel balls are clamped in the arc grooves at corresponding positions.

[0009] Furthermore, a first protrusion is provided on the reversing rotating core, and a clamping slot is provided on the reversing cover, and the first protrusion is clamped upwards in the clamping slot.

[0010] Furthermore, a second protrusion is provided on the commutation rotor core, a commutation brush is clamped on the second protrusion, and the commutation brush is connected to the PCB board.

[0011] Furthermore, a steering limit protrusion is arranged at a lateral position on the reversing rotating core, and a positioning protrusion is arranged at the top of the reversing rotating core.

[0012] Furthermore, a trigger is arranged on the outer side of the movable contact frame, and a sealing ring is sleeved on the outer end of the movable contact frame.

[0013] Furthermore, a spring column is fixed in the base, and the main spring is sleeved on the spring column.

[0014] Furthermore, buckles are provided on both sides of the base, and the PCB board is buckled on the buckles.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model provides a miniature DC brushless signal switch with multi-directional wiring. The housing is improved. In the same mold, three different outlet positions can be achieved by replacing inserts. The structure is optimized to make the switch body design more compact, and each space position is reasonably used, making the switch as a whole more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the internal installation structure of the base of the utility model.

[0020] Figure 3 It is a schematic diagram of the internal installation structure of the upper cover of the utility model.

[0021] Figure 4 It is a schematic diagram of the external structure of the upper cover of the utility model.

[0022] Figure 5 It is a schematic diagram of the structure of the first outlet position of the wiring harness of the utility model.

[0023] Figure 6 It is a schematic diagram of the structure of the second outlet position of the wiring harness of the utility model.

[0024] 1- reversing rotor core; 11- reversing spring; 12- through hole; 13- steel ball; 14- first protrusion; 15- second protrusion; 16- reversing brush; 17- steering limit protrusion; 18- positioning protrusion; 2- upper cover; 21- arc groove; 3- moving contact frame; 31- main spring; 32- trigger; 33- sealing ring; 4- base; 41- spring column; 42- buckle; 5- brush; 6- PCB board; 7- wiring harness; 8- reversing cover; 81- slot. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] like Figure 1-6 A miniature DC brushless signal switch providing multi-directional wiring is shown, comprising a commutation core 1, a moving contact frame 3 and a PCB board 6, wherein the commutation core 1 is installed in the upper cover 2 through a commutation spring 11, the moving contact frame 3 is installed in the base 4 through a main spring 31, a brush 5 is installed on the moving contact frame 3, the PCB board 6 is installed on the base 4, and the circuit belt of the PCB board 6 is connected to the brush 5, a wiring harness 7 is connected to the PCB board 6, the upper cover 2 is connected and fixed to the base 4, and the wiring harness 7 can pass through the outer sides of the upper cover 2 and the base 4.

[0027] As a preferred embodiment, a reversing cover 8 is provided on the top of the upper cover 2 , and the reversing cover 8 is fixed to the reversing rotor core 1 by bolts.

[0028] Furthermore, a through hole 12 is provided on the reversing rotor 1, and the reversing spring 11 is inserted into the through hole 12. A plurality of arc grooves 21 are provided in an annular shape on the inner wall of the upper cover 2. The two ends of the reversing spring 11 are connected to steel balls 13, and the steel balls 13 are clamped in the arc grooves 21 at corresponding positions.

[0029] Furthermore, a first protrusion 14 is provided on the reversing rotor core 1 , and a clamping groove 81 is provided on the reversing cover 8 , and the first protrusion 14 is clamped upwards into the clamping groove 81 .

[0030] Furthermore, a second protrusion 15 is provided on the commutation rotor core 1 , a commutation brush 16 is clamped on the second protrusion 15 , and the commutation brush 16 is connected to the PCB board 6 .

[0031] Furthermore, a lateral turning limit protrusion 17 is provided on the reversing rotor core 1 for turning limit. A positioning protrusion 18 is provided on the top of the reversing rotor core 1 for determining the direction of the reversing rotor core during installation.

[0032] As a preferred embodiment, a trigger 32 is arranged outside the movable contact frame 3 , and a sealing ring 33 is sleeved on the outer end of the movable contact frame 3 .

[0033] Furthermore, a spring column 41 is fixed in the base 4 , and the main spring 31 is sleeved on the spring column 41 .

[0034] Furthermore, buckles 42 are provided on both sides of the base 4 , and the PCB board 6 is buckled onto the buckles 42 .

[0035] Specifically, during the installation operation:

[0036] Two brushes 5 are installed on the moving contact frame 3, and then the moving contact frame 3 is installed in the base 4, and then the main spring 31 and is installed in the tail hole of the moving contact frame 3, and is sleeved on the spring column 41.

[0037] Install the commutation spring 11 and two steel balls 6 into the commutation core 1 , then install the commutation core 4 into the upper cover 3 so that the steel balls are stuck in the arc grooves 21 in the upper cover 2 , and then install the commutation brush 16 onto the commutation core 1 .

[0038] When the harness 7 is in the middle, first weld the harness 7 and the PCB board 6 together. If the harness 7 is at the upper or lower end, the harness 7 needs to pass through the upper cover 2 or the base 4 before welding. After the harness 7 and the PCB board 6 are welded, install the PCB into the base 4, and the buckle 42 of the base 4 will fix the PCB. Then install the upper cover 2 onto the base 4. Finally, connect the reversing cover 8 and the reversing core 1 with bolts.

[0039] The sealing ring 33 is sleeved on the movable contact frame 3, the tail of the sealing ring 33 is sleeved in the sealing groove, and finally the trigger 32 is installed.

[0040] Working principle:

[0041] When the trigger 32 is pressed inward, due to the linkage effect, the trigger 32 will drive the moving contact frame 3 to move inward together. Since the brush 5 is installed in the groove of the moving contact frame 3, the brush 5 will move together. One brush 5 is on the conduction signal belt of the PCB board 8, and the other brush 5 is on the speed regulating conduction belt of the PCB board 8. After a certain distance, the brush 5 conducts the circuit on the circuit board and gives a signal to start the machine. The speed regulating conduction belt is a potentiometer with a resistance belt. At this time, different conduction resistance signals will be given due to the different positions of the brush 5, which is used to control the speed of the machine. When the trigger 32 is pressed to the bottom, the machine will be at the maximum speed.

[0042] When the trigger 32 is released, the compressed main spring 31 will give the moving contact frame 3 an outward force, causing it to move outward and simultaneously driving the two brushes 5 thereon to move together. The rotation speed of the machine will decrease until the trigger 32 is released to a certain distance. When it is about to be completely released, the brush 5 on the conduction signal band will give a signal that the switch is powered off and the entire machine stops.

[0043] The function of the reversing cover 8 is to control the forward or reverse rotation of the whole machine by making the switch give different signals through its different positions of left, middle and right. When the reversing cover 8 is turned, since the reversing cover 8 and the reversing core 1 are connected together, the reversing core 1 will move with the reversing cover 8. Since the reversing brush 16 is installed on the reversing core 1, the reversing brush 16 will also rotate left or right. The reversing brush 16 contacts the PCB at two places. By rotating, the contact position is changed, so that the switch can give a signal of whether the machine is rotating forward or reverse.

[0044] The reversing core 1 is equipped with a steel ball 13 and a reversing spring 11. When the reversing core 1 is installed in the upper cover 3, the reversing spring 11 is compressed to provide thrust to the steel ball 13. The steel ball 13 is stuck in the arc groove 21 in the upper cover 3 to play a positioning role. When the reversing core 1 rotates left and right, the steel ball 13 will be stuck in the arc groove 21, so that the reversing core 1 can only be in the left, middle and right positions.

[0045] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary personnel in the field to the technical solution of the present invention should fall within the protection scope of the present invention, and the technical contents of the present invention for protection have been fully recorded in the claims.

Claims

1. A miniature DC brushless signal switch providing multi-directional wiring, characterized in that: The invention comprises a reversing rotor core (1), a moving contact frame (3) and a PCB (6); the reversing rotor core (1) is installed in an upper cover (2) via a reversing spring (11); the moving contact frame (3) is installed in a base (4) via a main spring (31); a brush (5) is installed on the moving contact frame (3); the PCB (6) is installed on the base (4); the circuit band of the PCB (6) is connected to the brush (5); a wiring harness (7) is connected to the PCB (6); the upper cover (2) and the base (4) are connected and fixed, and the wiring harness (7) can pass through the outer sides of the upper cover (2) and the base (4).

2. The miniature DC brushless signal switch providing multi-directional wiring according to claim 1, characterized in that: A reversing cover (8) is arranged on the top of the upper cover (2), and the reversing cover (8) is fixed to the reversing rotating core (1) by bolts.

3. The miniature DC brushless signal switch providing multi-directional wiring according to claim 2, characterized in that: The reversing rotor (1) is provided with a through hole (12), the reversing spring (11) is inserted into the through hole (12), a plurality of arc grooves (21) are annularly provided on the inner wall of the upper cover (2), the two ends of the reversing spring (11) are connected to steel balls (13), and the steel balls (13) are clamped in the arc grooves (21) at corresponding positions.

4. The miniature DC brushless signal switch providing multi-directional wiring according to claim 3, characterized in that: The reversing rotor core (1) is provided with a first protrusion (14), the reversing cover (8) is provided with a clamping groove (81), and the first protrusion (14) is clamped upwards into the clamping groove (81).

5. The miniature DC brushless signal switch providing multi-directional wiring according to claim 4, characterized in that: A second protrusion (15) is provided on the commutation rotor core (1), a commutation brush (16) is clamped on the second protrusion (15), and the commutation brush (16) is connected to the PCB (6).

6. The miniature DC brushless signal switch providing multi-directional wiring according to claim 5, characterized in that: A steering limiting protrusion (17) at a lateral position is arranged on the reversing rotating core (1), and a positioning protrusion (18) is arranged on the top of the reversing rotating core (1).

7. The miniature DC brushless signal switch providing multi-directional wiring according to claim 1, characterized in that: A trigger (32) is arranged on the outside of the movable contact frame (3), and a sealing ring (33) is sleeved on the outer end of the movable contact frame (3).

8. The miniature DC brushless signal switch providing multi-directional wiring according to claim 7, characterized in that: A spring column (41) is fixed inside the base (4), and the main spring (31) is sleeved on the spring column (41).

9. The miniature DC brushless signal switch providing multi-directional wiring according to claim 7, characterized in that: Buckles (42) are provided on both sides of the base (4), and the PCB (6) is buckled on the buckles (42).

Images