Compact electric tool signal switch

Abstract

The utility model discloses a compact electric tool signal switch, which comprises a base, a PCB (printed circuit board), a push rod assembly, a reversing cover plate, a reversing rotating body and the like, and is mainly characterized in that the reversing cover plate and the reversing rotating body are assembled in a mounting hole at the top of the base together, and a reversing electric brush is contacted on the PCB; and when the commutation rotating body is driven by the commutation cover plate to form sealed rotation in the mounting hole, the commutation electric brush can be driven to synchronously rotate to be in contact with the PCB so as to form various working state outputs. Obviously, the top of the base forms an integral mounting structure, so that the height size is reduced, the use requirement of market miniaturization is met, the production cost of the product is reduced, and the assembly process is simplified; and meanwhile, the top of the base is of a complete structure, so that the lateral stress of the reversing cover plate rotationally assembled in the mounting hole can directly act on the base, and the reversing cover plate is matched with the sealing ring to form dynamic sealing, so that the waterproof and dustproof function grade of the electric tool signal switch can be greatly improved and promoted.

Description

TECHNICAL FIELD

[0001] The utility model relates to a signal switch, in particular to a compact electric tool signal switch. BACKGROUND

[0002] The electric tool signal switch relates to the start-stop control technology of electric tool switch motor, and its structure is mainly composed of a base, a PCB plate and a push rod assembly installed in the base, a reversing rotary body and a reversing cover plate rotatably installed on the top of the base and the like, the base usually comprises a shell and a shell cover, the reversing rotary body is rotatably arranged in the shell cover, the reversing cover plate is rotatably covered on the top of the convex round table of the shell cover, and the assembled shell cover is sealingly covered on the top of the shell, and this structure has many defects in actual use: 1, due to the increase of the shell cover structure and the design of the round table on the top of the shell cover, the overall height size of the electric tool signal switch is difficult to control, thereby causing poor compactness, and the volume of the portable tool complete machine on the market is more and more exquisite and small, and the appearance size requirement of the electric tool signal switch is also more and more compact, obviously, the electric tool signal switch with this structure has been difficult to meet the use needs of the market; 2, due to the shell cover structure, the production cost of the product is increased, and the assembly process is more troublesome; 3, due to the size and appearance structure limitation of the electric tool signal switch, the tension and lateral force borne by the reversing cover plate driven to rotate are limited, usually, the lateral force of the reversing cover plate directly acts on the shell cover, which causes the cover joint between the shell cover and the shell to be separated due to stress, thereby affecting the sealing performance of the joint, and finally affecting the waterproof performance and dustproof performance of the whole electric tool signal switch. CONTENT OF THE UTILITY MODEL

[0003] The utility model solves the technical problem in overcoming the defects of the prior art and provides a compact electric tool signal switch which is small in volume, compact in structure, simple in assembly, low in production cost, and can effectively improve and enhance the waterproof and dustproof function level.

[0004] The technical problem of the utility model is solved through the following technical scheme:

[0005] A compact electric tool signal switch comprises a base, a PCB board and a push rod assembly installed in the base, and a reversing rotor and a reversing cover plate rotatably installed on the top of the base; the push rod assembly is provided with a signal brush, and the push rod assembly drives the signal brush to axially reciprocate and contact the PCB board to form various signal outputs; the reversing cover plate is installed on the top of the reversing rotor, and the bottom of the reversing rotor is provided with a reversing brush; the reversing cover plate and the reversing rotor are jointly fitted into the mounting hole on the top of the base, and the reversing brush contacts the PCB board; the reversing rotor is driven by the reversing cover plate to form a sealed rotation in the mounting hole, and in turn drives the reversing brush to synchronously rotate and contact the PCB board to form various working state outputs.

[0006] The mounting hole is composed of an upper hole and a lower hole with the same axis, and the diameter of the upper hole is larger than that of the lower hole; the reversing rotor is rotatably fitted into the lower hole, and the reversing cover plate is rotatably fitted into the upper hole.

[0007] An inner shoulder is formed between the upper hole and the lower hole, and a sealing ring is arranged on the inner shoulder to contact the bottom surface of the reversing cover plate and form a sealed rotation of the reversing cover plate in the upper hole.

[0008] An annular groove is arranged on the inner shoulder for embedding the sealing ring.

[0009] A limiting block and a limiting sliding groove are respectively arranged between the outer circumferential surface of the reversing cover plate and the inner circumferential surface of the mounting hole, and the limiting block is limited in the sliding stroke in the limiting sliding groove to limit the rotating stroke of the reversing cover plate in the mounting hole.

[0010] A plug and a socket are respectively arranged between the reversing cover plate and the reversing rotor for plug-in connection, and the reversing cover plate drives the synchronous rotation of the reversing rotor through the plug-in connection of the plug and the socket.

[0011] A positioning bead and a positioning groove are respectively arranged between the outer circumferential surface of the reversing cover plate and the inner circumferential surface of the mounting hole to form the rotating positioning of the reversing cover plate.

[0012] The bottom of the reversing rotor is provided with a limiting table and a positioning column for fitting and fixing the reversing brush.

[0013] One side of the base is provided with a mounting port and a seat cover for sealing the mounting port, and the other side of the base is provided with a push rod hole for the push rod assembly to pass through.

[0014] The seat cover is provided with a threading hole, and a signal line is inserted through the threading hole to connect the PCB board.

[0015] Compared with the prior art, the utility model mainly is the installation hole of common installation in the base top with the commutating cover and the commutating rotor, that is, omit the shell cover design in the traditional structure, but directly designs the installation hole that can be equipped with the commutating cover and the commutating rotor in the base top, and makes the commutating brush contact on the PCB board in the commutating rotor bottom, so when the commutating rotor is driven in the installation hole and forms the sealed rotation of commutating cover, can drive the commutating brush synchronous rotation and contact the PCB board and form various working state output. Obviously, since the design and installation of shell cover structure are omitted, the base top can form the whole, which not only greatly reduces the overall height size of the electric tool signal switch, makes the electric tool signal switch can better satisfy the miniaturization use needs of market, but also can reduce the production cost of product, especially the commutating cover and the commutating rotor directly equipped in the installation hole of base top, also greatly simplifies the assembly process, at the same time, due to the structure limitation of size appearance, the tension and lateral force borne on the commutating cover of rotary drive are limited, since the base top is the complete structure, the lateral force of commutating cover rotary equipped in the installation hole is directly applied to the base, and then forms dynamic sealing with the sealing ring, can greatly improve and promote the waterproof and dustproof function level of electric tool signal switch. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the exploded view of the utility model.

[0017] Figure 2 It is Figure 1 It is the sectional view of removing the signal line.

[0018] Figure 3 It is Figure 2 It is the sectional view of removing the seat cover and push rod assembly.

[0019] Figure 4 It is the assembly structure sectional view of commutating rotor and commutating cover.

[0020] Figure 5 It is Figure 4 It is one of the perspective views of the utility model.

[0021] Figure 6 It is Figure 4 It is another perspective view of the utility model.

[0022] Figure 7 It is Figure 4 It is the exploded view of the utility model.

[0023] Figure 8 It is the bottom schematic view of commutating rotor.

[0024] Figure 9 It is the top schematic view of commutating cover.

[0025] Figure 10 is a schematic view of the bottom of the reversing cover plate.

[0026] Figure 11 is one of the perspective views of the base.

[0027] Figure 12 is another of the perspective views of the base. DETAILED DESCRIPTION

[0028] The following will be described in detail according to the above-mentioned drawings.

[0029] As shown in Figures 1-12 1. base, 11. mounting hole, 111. upper hole, 112. lower hole, 113. outer shoulder, 114. ring groove, 115. limiting sliding groove, 116. positioning groove, 12. guide groove, 13. mounting port, 14. push rod hole, 2. seat cover, 21. threading hole, 3. PCB board, 31. signal wire, 4. push rod assembly, 41. push rod handle, 42. push rod head, 43. trigger, 44. signal brush, 45. push rod spring, 46. sealing sleeve, 5. reversing rotor, 51. insertion hole, 511. buckling table, 52. limiting table, 53. positioning column, 6. reversing cover plate, 61. limiting block, 62. driving block, 63. insertion pin, 64. side hole, 7. reversing brush, 8. sealing ring, 9. positioning bead, 91. positioning spring, 10. sealing ring.

[0030] A compact electric tool signal switch, as shown in Figure 1 mainly relates to the start-stop control technology of the electric tool switch motor, and the structure comprises a base 1, a PCB board 3 and a push rod assembly 4 mounted in the base, and a reversing rotor 5 and a reversing cover plate 6 rotationally mounted on the top of the base.

[0031] The base 1 is in the shape of a rectangular box, and one side of the base is provided with a rectangular mounting port 13, that is Figure 1 as shown in the left side of the base, the mounting port is provided, so that the PCB board 3 and the push rod assembly 4 can be mounted into the base 1 through the mounting port 13, and a seat cover 2 is further provided to seal and cover the mounting port 13, so that a sealing ring 10 is provided on the seat cover 2 to tightly cooperate with the mounting port 13 to form a mounting seal.

[0032] In addition, the seat cover 2 is provided with a threading hole 21, and the signal wire 31 is connected to the PCB board 3 through the threading hole, so as to perform signal transmission connection of the electric tool signal switch.

[0033] The other side of the base 1 is provided with a circular push rod hole 14, that is Figure 1 as shown in the right side of the base, the push rod hole 14 is provided, and the push rod assembly 4 passes through the push rod hole.

[0034] The push rod assembly 4 is composed of a push rod head 42 and a push rod handle 41, which is a cylindrical rod. One end of the push rod handle 41 extends into the base 1 through the push rod hole 14 and is fixedly installed with the push rod head 42. The other end of the push rod handle 41 is located outside the base 1 and is provided with a fixedly installed trigger 43. Therefore, the push rod handle 41 can be axially reciprocated by being pressed and driven by the trigger 43, and the push rod head 42 in the base can also be synchronously axially reciprocated.

[0035] The right side of the base 1 is also provided with an outwardly extending guide plate and guide grooves 12 arranged on both sides of the guide plate. The guide grooves can be used for the movement and assembly of the trigger 43, that is, the trigger can be guided to move axially and reciprocally more accurately.

[0036] The push rod spring 45 is arranged in the base 1 to elastically push the push rod head 42. Therefore, the push rod assembly 4 always has a tendency to move outward under the elastic pushing of the push rod spring, and mainly plays a role in resetting the push rod assembly.

[0037] The sealing sleeve 46 is arranged in the push rod hole 14 and forms a dynamic seal with the push rod handle 41 entering and exiting the push rod hole 14. Therefore, when the push rod handle 41 moves axially and reciprocally, the waterproof and dustproof performance between the push rod handle 41 and the push rod hole 14 can be ensured.

[0038] The push rod head 42 is provided with signal brushes 44. In this embodiment, two signal brushes are designed, and the two signal brushes are installed side by side on the top surface of the push rod head 42. In this way, the push rod assembly 4 drives the signal brushes 44 to move axially and reciprocally to contact the PCB board 3, so as to form various signal outputs. Specifically, with the axial and reciprocal movement of the push rod assembly, one of the signal brushes contacts the PCB board to form an ON-OFF signal output, and the other signal brush contacts the PCB board to form a potentiometer signal output.

[0039] The base is provided with a circular mounting hole 11 composed of an upper hole 111 and a lower hole 112 coaxially arranged. The diameter of the upper hole 111 is larger than that of the lower hole 112, so that an annular inner shoulder 113 is formed between the upper hole 111 and the lower hole 112.

[0040] The reversing rotor 5 is rotatably arranged in the lower hole 112 through the top circular platform on the top of the reversing rotor 5, and the reversing cover plate 6 is rotatably arranged in the upper hole 111 through the bottom circular platform on the bottom of the reversing cover plate 6, and the reversing cover plate is arranged on the top of the reversing rotor, and a plug 63 and a socket 51 are respectively arranged between the reversing cover plate 6 and the reversing rotor 5 for plug-in connection, and the reversing cover plate 6 drives the synchronous rotation of the reversing rotor 5 through the plug-in connection of the plug 63 and the socket 51, and in the embodiment, a pair of plugs 63 with hooks are arranged on the bottom of the reversing cover plate 6, and a rectangular socket 51 is arranged on the top of the reversing rotor 5, and a buckle platform 511 is further arranged in the socket 51, so that the pair of plugs 63 are plug-in connected into the socket 51, and the hooks are connected to the buckle platform 511, so that the connection between the reversing cover plate 6 and the reversing rotor 5 is realized, and the synchronous rotation of the reversing cover plate 6 and the reversing rotor 5 is realized.

[0041] The inner shoulder 113 is provided with a sealing ring 8, which is embedded in the ring groove 114 arranged on the inner shoulder 113, and the sealing ring 8 contacts the bottom surface of the reversing cover plate 6 to form a rotating seal of the reversing cover plate in the upper hole 111.

[0042] The top of the reversing cover plate 6 is provided with a driving block 62, and an external force can be applied to the driving block to drive the rotation of the reversing cover plate 6; the bottom of the reversing rotor 5 is provided with a reversing brush 7, which is arranged and fixed through the limiting platform 52 and the positioning column 53 on the bottom of the reversing rotor, and when the reversing cover plate 6 and the reversing rotor 5 are arranged in the mounting hole 11 on the top of the base 1, the reversing brush 7 can contact the PCB 3.

[0043] In this way, when the reversing rotor 5 is driven by the reversing cover plate 6 to form a sealed rotation in the mounting hole 11, the reversing brush 7 can be driven to rotate synchronously to contact the PCB 3 to form various working state outputs, such as forward rotation signal, reverse rotation signal or no-reversing signal.

[0044] Meanwhile, the outer circumferential surface of the reversing cover plate 6 or the reversing rotor 5 is respectively provided with a limiting block 61 and a limiting sliding groove 115 which are arranged in each other, and in the embodiment, a pair of center-symmetrically arranged limiting blocks 61 are arranged on the outer circumferential surface of the bottom circular platform of the reversing cover plate 6, and a pair of center-symmetrically arranged limiting sliding grooves 115 are arranged on the inner circumferential surface of the upper hole 111 of the mounting hole 11, so that the pair of limiting blocks 61 are respectively arranged in the pair of limiting sliding grooves 115, and the sliding stroke of the limiting block 61 in the limiting sliding groove 115 can limit the rotating stroke of the reversing cover plate 6 in the upper hole 111, and thus the rotating stroke of the reversing cover plate 6 and the reversing rotor 5 in the mounting hole 11 is limited.

[0045] In addition, the outer circumferential surface of the reversing cover plate 6 and the inner circumferential surface of the mounting hole 11 are respectively provided with a positioning bead 9 and a positioning groove 116 constituting the rotating positioning of the reversing cover plate, specifically, the outer circumferential surface of the reversing cover plate 6 is provided with a side hole 64, the positioning bead 9 is elastically pushed outward by the positioning spring 91 placed in the side hole 64, and the inner circumferential surface of the mounting hole 11, specifically the upper hole 111, is provided with three positioning grooves 116, so that the positioning bead 9 is selectively fitted in the three positioning grooves 116 with the rotation of the reversing cover plate 6, thereby locking a rotating position of the reversing cover plate 6 by each positioning groove 116, and generating the feeling of left and right steering.

[0046] The utility model discloses can guarantee the integrity of pedestal top, because the design and installation of traditional electric tool signal switch all have shell cover structure are omitted, this not only greatly reduces the overall height size of electric tool signal switch, makes the electric tool signal switch can better satisfy the miniaturization use needs of market, and also can reduce the production cost of product, especially reversing cover plate 6 and reversing rotor 5 directly fit in the mounting hole 11 of pedestal 1 top, also greatly simplify the assembly process.

[0047] Moreover, due to the structural limitations of the size and shape of the electric tool signal switch, the tension and lateral force on the rotating drive reversing cover plate are limited. Since the top of the base is a complete structure, the lateral force on the reversing cover plate rotatingly fitted in the mounting hole also directly acts on the base. In combination with the dynamic seal formed by the sealing ring, the waterproof and dustproof function level of the electric tool signal switch can be greatly improved.

[0048] The above is only a specific embodiment of the utility model, and those skilled in the art should understand that any equivalent structural design to the embodiment should be included in the protection scope of the utility model.

Claims

1. A compact electric tool signal switch, comprising a base (1), a PCB board (3) and a push rod assembly (4) installed in the base, and a reversing rotor (5) and a reversing cover plate (6) rotatably installed on the top of the base; the push rod assembly (4) is provided with a signal brush (44), and the push rod assembly drives the signal brush (44) to axially reciprocate to contact the PCB board (3) to form a signal output; the reversing cover plate (6) is installed on the top of the reversing rotor (5), and the bottom of the reversing rotor is provided with a reversing brush (7), characterized in that The reversing cover plate (6) and the reversing rotor (5) are fitted together in the mounting hole (11) on the top of the base (1), and the reversing brush (7) contacts the PCB (3); the reversing rotor (5) is driven by the reversing cover plate (6) to form a sealed rotation in the mounting hole (11), and in turn drives the reversing brush (7) to rotate synchronously to contact the PCB (3) to form a working state output.

2. A compact power tool signal switch according to claim 1, characterized in that The mounting hole (11) is composed of coaxial upper hole (111) and lower hole (112), the hole diameter of the upper hole is larger than that of the lower hole; the reversing rotor (5) is rotationally fitted in the lower hole (112), and the reversing cover plate (6) is rotationally fitted in the upper hole (111).

3. A compact power tool signal switch according to claim 2, characterized in that The inner shoulder (113) is formed between the upper hole (111) and the lower hole (112), and the sealing ring (8) is arranged on the inner shoulder (113) and contacts the bottom surface of the reversing cover plate (6) to form a rotating seal of the reversing cover plate (6) in the upper hole (111).

4. A compact power tool signal switch according to claim 3, characterized in that The inner shoulder (113) is provided with a ring groove (114) for embedding the sealing ring (8).

5. The compact power tool signal switch of claim 1, wherein The outer circumferential surface of the reversing cover plate (6) and the inner circumferential surface of the mounting hole (11) are respectively provided with a limiting block (61) and a limiting sliding groove (115) which are fitted together, and the sliding stroke of the limiting block (61) in the limiting sliding groove (115) limits the rotating stroke of the reversing cover plate (6) in the mounting hole (11).

6. A compact power tool signal switch according to claim 1, wherein The reversing cover plate (6) and the reversing rotor (5) are respectively provided with a pin (63) and a socket (51) which are connected together, and the reversing cover plate (6) drives the synchronous rotation of the reversing rotor (5) through the pin (63) and the socket (51).

7. A compact power tool signal switch according to claim 1, wherein The outer circumferential surface of the reversing cover plate (6) and the inner circumferential surface of the mounting hole (11) are respectively provided with a positioning bead (9) and a positioning groove (116) which constitute the rotating positioning of the reversing cover plate.

8. The compact power tool signal switch of claim 1, wherein The bottom of the reversing rotor (5) is provided with a limiting table (52) and a positioning column (53) for fitting and fixing the reversing brush (7).

9. The compact power tool signal switch of claim 1, wherein One side of the base (1) is provided with a mounting port (13) and a seat cover (2) which seals the mounting port, and the other side of the base (1) is provided with a push rod hole (14) through which the push rod assembly (4) moves.

10. A compact power tool signal switch according to claim 9, characterized in that The seat cover (2) is provided with a threading hole (21), and the signal line (31) is inserted through the threading hole to connect the PCB (3).

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