A power tool switch

Abstract

The present invention discloses an electric tool switch, including an insulating base, an insulating upper cover, a handle, a U-shaped one-way positioning bracket, a push piece and a small forward and backward switch. The insulating base is connected to the insulating upper cover, and the insulating base and the insulating upper cover are connected as a whole and are referred to as a box body. The U-shaped one-way positioning bracket is installed at the upper end of the box body, and the push piece is inserted in the handle. The electric tool switch has the following advantages: 1. High strength, good space sealing, and good dustproof effect; 2. When the switch is opened and closed, the force is uniform, the movement is comfortable, and the hearing is soft; 3. It can ensure the sealing between the push rod when the push rod moves back and forth relative to the box body, and the speed regulation function can be achieved by pushing the push rod; 4. The overall structural lines are simple and smooth, and the heat dissipation skylight strengthens the heat dissipation; 5. The four positioning holes and the three hooks extending from the side are respectively fixed with the four positioning columns B and the three fixing hooks B to prevent the small forward and backward switch from being separated from the box body when it is toggled.

Description

Technical Field

[0001] The invention relates to the technical field of electric tool components, in particular to an electric tool switch. Background Art

[0002] In the switches currently used for similar power tools, there are the following technical problems:

[0003] 1. The upper cover and the base are a combination of a flat surface or a flat groove, and no or only a hard dust ring is added to the movable push rod, which has a poor dustproof effect. This causes most of the powder, dust and other fine substances to enter the switch and short-circuit it. Therefore, the life of the switch becomes very short.

[0004] 2. Nowadays, the requirements for assembly space and simple and beautiful appearance of power tool switches (hereinafter referred to as switches) are getting higher and higher as the application scope of power tools continues to expand. Especially for compact tools, the installation method of separating the forward and reverse functions of the work from the switch with another component cannot meet the requirements of such compact tools.

[0005] In view of the above problems, an electric tool switch is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide an electric tool switch with high connection strength, good space sealing, good dustproof effect, uniform force, smooth movement, soft hearing, good heat dissipation effect, and can prevent the small forward and reverse switch from separating from the box body when it is toggled, thereby solving the problem of poor dustproof effect in the prior art and the need for another component to separate the forward and reverse functions from the switch.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric tool switch, comprising an insulating base, an insulating upper cover, a latch, a U-shaped one-way positioning bracket, a pushing piece and a small forward and reverse switch, wherein the insulating base is connected to the insulating upper cover, and the insulating base and the insulating upper cover are connected as a whole and are hereinafter referred to as a box body, the U-shaped one-way positioning bracket is installed at the upper end of the box body, and the pushing piece is inserted in the latch; the small forward and reverse switch is connected to the side end of the box body.

[0008] Preferably, the insulating base is internally installed with the first and second fixed conductors, two static contacts, a support frame, two movable strips and two moving contacts, the first fixed conductor is installed at the middle end of the inner surface of the insulating base, a static contact is installed at the side end of the first fixed conductor, and the other static contact is fixedly installed on the second fixed conductor on the side opposite to the first fixed conductor; the support frame is fixedly installed inside the insulating base, the two movable strips are respectively hinged on both sides of the support frame, and the two moving contacts are respectively installed at the front ends of the two movable strips; the two moving contacts are respectively contacted and connected with the corresponding static contacts; signal connection pins are fixedly installed at both ends of the left side of the inner cavity of the insulating base, and the side ends of the signal connection pins are respectively installed with the second fixed conductor and the support frame, and the second fixed conductor protrudes from the outside of the insulating base; a built-in capacitor is installed on the right side of the inner cavity of the insulating base, and a high and low concave groove A is opened on the outer side of the insulating base; positioning columns A are symmetrically cast on the outer side of the left side of the insulating base, and a fixing hook A is fixedly cast at the center of the top left side of the insulating base.

[0009] Preferably, the interior of the insulating upper cover is provided with two soldering pads, a PCB board, a heat sink and a carbon film varistor strip, the heat sink is fixedly welded to the interior of the insulating upper cover, the PCB board is arranged on the upper end surface of the heat sink, the two soldering pads are spot welded on both sides of the PCB board respectively, and the carbon film varistor strip is installed on the PCB board inside the soldering pads; a high and low concave groove B is opened on the outer side of the insulating upper cover, and the high and low concave groove B of the insulating upper cover is fastened and buckled with the high and low concave groove A of the insulating base; a heat dissipation skylight is installed on one side of the top of the insulating upper cover, and two wire clamping parts are installed on the other side of the insulating upper cover, and a wire clamping groove is formed between the two wire clamping parts.

[0010] Preferably, four positioning columns B are installed on the side end of the box body, a concave oblique hook is installed on the box body on the side adjacent to the positioning columns B, and a fixing hook B is installed on the upper end of the box body; an inverted L-shaped stopper and a special U-shaped one-way positioning bracket are installed on the other side of the box body adjacent to the box body positioning columns B.

[0011] Preferably, the pushing member includes a push rod, a main spring, a sealing ring and a sliding claw, the push rod sealing ring is sleeved on the push rod, the sliding claw is fixedly installed on the upper end of the push rod, and the main spring is fixedly installed on the side end of the push rod.

[0012] Preferably, the small forward-reverse switch comprises a switch body, a positioning hole, a hook, a convex oblique hook and a forward-reverse lever, the hook is on the outside of the switch body, the positioning hole is provided on the upper end surface of the switch body, and the forward-reverse lever is fixedly mounted on the side end of the switch body.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The electric tool switch has the following advantages: 1: high connection strength, good space sealing and good dustproof effect; 2: when the switch is opened and closed, the force is evenly distributed, the movement is smooth and the hearing is soft; 3: it can ensure the sealing between the push rod and the box body when the push rod moves back and forth relative to the box body, and the speed regulation function can be achieved by pushing the push rod; 4: the exterior of the insulating base and the insulating upper cover are all-plane designed with simple and smooth lines. The wire clamping groove formed between the two clamping parts provides convenience for fixing the power cord, and the heat dissipation skylight is set to enhance the heat dissipation; 5: the four positioning holes and the three hooks extending from the side are double-fixed with the four positioning columns B and the three fixing hooks A / three fixing hooks B, respectively, which can prevent the reverse small switch from being separated from the box body when it is toggled. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall exploded view of the present invention;

[0016] Figure 2 A top view of the insulating base of the present invention;

[0017] Figure 3 It is an inner view of the insulating base of the present invention;

[0018] Figure 4 The external structure diagram of the insulating base of the present invention;

[0019] Figure 5 This is an internal diagram of the insulating upper cover of the present invention;

[0020] Figure 6 This is an external view of the insulating upper cover of the present invention;

[0021] Figure 7 It is a narrow side view of the box body of the present invention;

[0022] Figure 8 It is a long side view of the box body of the present invention;

[0023] Fig. 9 It is a schematic diagram of the structure of the push member of the present invention;

[0024] Fig.10 It is a schematic diagram of the forward and reverse small switch structure of the present invention.

[0025] In the figure: 1. Insulation base; 2. Insulation cover; 3. Handle; 4. Pushing member; 5. Reverse small switch; 6. First fixed conductor; 7. Static contact; 8. Support frame; 9. Moving strip; 10. Moving contact; 11. Signal connection pin; 12. Second fixed conductor; 13. Built-in capacitor; 14. High and low concave groove A; 15. Positioning column A; 16. Fixing hook A; 17. Pad; 18. PCB board; 19. Heat sink; 20. , carbon film variable resistance strip; 21, heat dissipation skylight; 22, clamping part; 23, push rod; 24, main spring; 25, sealing ring; 26, sliding claw; 27, positioning column B; 28, concave oblique hook; 29, fixing hook B; 30, inverted L-shaped block; 31, special U-shaped one-way positioning bracket; 32, switch body; 33, positioning hole; 34, hook; 35, convex oblique hook; 36, forward and reverse lever; 37, high and low concave groove B; 38, box body. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1 A power tool switch includes an insulating base 1, an insulating upper cover 2, a grip 3, a U-shaped one-way positioning rim 31, a pushing piece 4 and a small forward / reverse switch 5. The insulating base 1 is connected to the insulating upper cover 2. The insulating base 1 and the insulating upper cover 2 are connected as a whole and are hereinafter referred to as a box body 38. The U-shaped one-way positioning rim 31 is installed at the upper end of the box body 38, and the pushing piece 4 is inserted in the grip 3; the small forward / reverse switch 5 is connected to the side end of the box body 38.

[0028] See also Figure 2-4The insulating base 1 is provided with a first fixed conductor 6 and a second fixed conductor 12, two static contacts 7, a support frame 8, two moving strips 9 and two moving contacts 10. The first fixed conductor 6 is mounted on the middle end of the inner surface of the insulating base 1, a static contact 7 is mounted on the side end of the first fixed conductor 6, and the other static contact 7 is fixedly mounted on the second fixed conductor 12 on the side opposite to the first fixed conductor 6; the support frame 8 is fixedly mounted on the inside of the insulating base 1, the two moving strips 9 are respectively hinged on both sides of the support frame 8, and the two moving contacts 10 are respectively mounted on the two moving strips The front end of the plate 9; the two moving contacts 10 are respectively in contact with the corresponding static contacts 7; the signal connection pins 11 are fixedly installed at both ends of the left side of the inner cavity of the insulating base 1, and the side ends of the signal connection pins 11 are respectively installed with the second fixed conductor 12 and the support frame 8, and the second fixed conductor 12 protrudes from the outside of the insulating base 1; the right side of the inner cavity of the insulating base 1 is installed with a built-in capacitor 13, and the outer side edge of the insulating base 1 is provided with a high and low concave groove A14; the left side of the insulating base 1 is symmetrically cast with positioning columns A15, and the left top center of the insulating base 1 is fixedly cast with a fixing hook A16.

[0029] See also Figure 5-6 Two soldering pads 17, a PCB board 18, a heat sink 19 and a carbon film varistor strip 20 are provided inside the insulating upper cover 2, the heat sink 19 is fixed inside the insulating upper cover 2, the PCB board 18 is arranged on the upper end surface of the heat sink 19, the two soldering pads 17 are spot welded on both sides of the PCB board 18 respectively, and the carbon film varistor strip 20 is installed on the PCB board 18 inside the soldering pads 17; a high and low concave groove B37 is opened on the outer side of the insulating upper cover 2, and the high and low concave groove B37 of the insulating upper cover 2 is fastened and buckled with the high and low concave groove A14 of the insulating base 1; a heat dissipation skylight 21 is installed on one side of the top of the insulating upper cover 2, and two wire clamping parts 22 are installed on the other side of the insulating upper cover 2, and a wire clamping groove is formed between the two wire clamping parts 22.

[0030] See also Figure 7-8 Four positioning columns B27 are installed on the side ends of the box body 38, a concave oblique hook 28 is installed on the U-shaped one-way positioning bracket 31 on the side adjacent to the positioning column B27, and a fixing hook B29 is installed on the upper end of the insulating upper cover 2; an inverted L-shaped stopper 30 and a U-shaped one-way positioning bracket 31 are installed on the other side of the box body 38 adjacent to the positioning column B27 of the box body 38.

[0031] See also Fig. 9 The push member 4 includes a push rod 23, a main spring 24, a sealing ring 25 and a sliding claw 26. The sealing ring 25 is sleeved on the push rod 23, the sliding claw 26 is fixedly installed on the upper end of the push rod 23, and the main spring 24 is fixedly installed on the side end of the push rod 23.

[0032] See also Fig.10The forward-reverse small switch 5 includes a switch body 32, a positioning hole 33, a hook 34, a convex oblique hook 35 and a forward-reverse lever 36. The hook 34 is on the outside of the switch body 32, the positioning hole 33 is provided on the upper end surface of the switch body 32, and the forward-reverse lever 36 is fixedly installed on the side end of the switch body 32.

[0033] The structural connection and structural setting of the electric tool switch have the following advantages:

[0034] 1: The insulating upper cover 2 and the insulating base 1 are connected by fastening and clamping the high and low concave grooves B37 and the high and low concave grooves A14 to strengthen dust isolation.

[0035] 2: The four ends of the two signal connection pins 11 are rigidly connected to the first fixed conductor 6, the support frame 8, and the two pads 17 on the PCB board 18, respectively. The capacitor is changed to a built-in and press-card type, which can further enhance the connection strength and space sealing.

[0036] 3: The static contact 7 is arranged on the first fixed conductor 6 and the second fixed conductor 12, and the two moving contacts 10 are respectively arranged on the two moving strips 9, standing on both sides of the support frame 8. When the push rod 23 of the push member 4 and the box body 38 move back and forth, they show a seesaw motion, the force is more uniform, the movement is comfortable, and the hearing is soft.

[0037] 4: The push member 4 is arranged in the box body 38, the front end of the push rod 23 is pressed against the inner wall of the box body 38 through the main spring 24, and the rear end extends out of the box body 38. The outer periphery of the sealing ring 25 is fixedly connected to the box body 38, and the inner periphery is in close contact with the push rod 23, which can ensure the seal between the two when the push rod 23 moves back and forth relative to the box body 38. When the sliding claw 26 contacts the carbon film variable resistance strip 20, the push rod 23 moves back and forth relative to the box body 38, at this time, the sliding claw 26 is driven to move on the carbon film variable resistance strip 20, resulting in a change in resistance value, thereby achieving the function of speed regulation.

[0038] 5: The exterior of the insulating base 1 and the insulating upper cover 2 is a full-plane design with simple and smooth lines. The wire clamping groove formed between the two wire clamping members 22 at the upper end of the insulating upper cover 2 provides convenience for fixing the power cord. A heat dissipation skylight 21 is provided to enhance heat dissipation.

[0039] 6: By setting the forward-reverse small switch 5 and the special U-shaped one-way positioning frame 31 with a one-way low-speed positioning function, four positioning holes 33 and three hooks 34 extending from the side are set at the bottom of the forward-reverse small switch 5, which are double-fixed with four positioning columns B27 and three fixing hooks A16 / three fixing hooks B29 set at the side ends of the box body 38, respectively, to prevent the forward-reverse small switch 5 from detaching from the box body 38 when it is toggled.

[0040] 7: The concave oblique hook 28 in the middle of one end of the U-shaped one-way positioning yoke 31 is interlocked with the convex oblique hook 35 in the middle of the reverse forward lever 36, and the other end is laid flat through the inverted L-shaped stopper 30 on the long side of the box body 38. When the reverse forward lever 36 is moved, the U-shaped one-way positioning yoke 31 is driven to achieve the one-way low-speed positioning function.

[0041] In summary: the electric tool switch has the following advantages: 1: high connection strength, good space sealing, and good dustproof effect; 2: when the switch is opened and closed, the force is uniform, the movement is smooth, and the hearing is soft; 3: it can ensure the sealing between the push rod 23 when it moves back and forth relative to the box body 38, and the speed regulation function can be achieved by pushing the push rod 23; 4: the exterior of the insulating base 1 and the insulating upper cover 2 is a full-plane design with simple and smooth lines. The wire clamping groove formed between the two wire clamping parts 22 provides convenience for fixing the power cord, and the heat dissipation skylight 21 is set to enhance heat dissipation; 5: the four positioning holes 33 and the three hooks 34 extending from the side are respectively fixed with the four positioning columns B27 and the three fixing hooks A16 / three fixing hooks B29 for double fixation, which can prevent the reverse small switch 5 from being separated from the box body 38 when it is toggled.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric tool switch, comprising an insulating base (1), an insulating upper cover (2), a hand grip (3), a U-shaped one-way positioning frame (31), a push member (4) and a small forward and reverse switch (5), characterized in that: The insulating base (1) is connected to the insulating upper cover (2), and the insulating base (1) and the insulating upper cover (2) are connected as a whole and are hereinafter referred to as a box body (38). A special U-shaped one-way positioning bracket (31) is installed at the upper end of the box body (38), and a push piece (4) is inserted into the hand grip (3); the forward and reverse small switch (5) is connected to the side end of the box body (38), and a first fixed conductor (6), a second fixed conductor (12), two static contacts (7), a support frame (8), two moving strips (9) and two moving contacts (10) are installed inside the insulating base (1); the first fixed conductor (6) is installed at the middle end of the inner surface of the insulating base (1), and a static contact (7) is installed at the inner surface of the insulating base (1). The contact (7) is mounted on the side end of the first fixed conductor (6), and the other static contact (7) is fixedly mounted on the second fixed conductor (12) on the side opposite to the first fixed conductor (6); the support frame (8) is fixedly mounted inside the insulating base (1), the two moving strips (9) are respectively hinged on the two sides of the support frame (8), and the two moving contacts (10) are respectively mounted on the front ends of the two moving strips (9); the two moving contacts (10) are respectively in contact with the corresponding static contacts (7); the left ends of the inner cavity of the insulating base (1) are fixedly mounted with signal connection pins (11), and the side ends of the signal connection pins (11) are respectively mounted with the second fixed conductor (12); The insulating base (1) is provided with a body (12) and a support frame (8), the second fixed conductor (12) protruding from the outside of the insulating base (1); a built-in capacitor (13) is installed on the right side of the inner cavity of the insulating base (1), and a high and low concave groove A (14) is opened on the outer side of the insulating base (1); a positioning column A (15) is symmetrically cast on the left side of the insulating base (1), and a fixing hook A (16) is fixedly cast at the center of the left top of the insulating base (1); two pads (17), a PCB board (18), a heat sink (19) and a carbon film resistor strip (20) are provided inside the insulating upper cover (2), and the heat sink (19) is fixed to the inner side of the insulating upper cover (2). The insulating upper cover (2) is provided with a PCB board (18) on the upper end surface of the heat sink (19), two solder pads (17) are spot-welded on both sides of the PCB board (18), and a carbon film resistor strip (20) is mounted on the PCB board (18) on the inner side of the solder pads (17); a high-low concave groove B (37) is formed on the outer side of the insulating upper cover (2), and the high-low concave groove B (37) of the insulating upper cover (2) is fastened and buckled with the high-low concave groove A (14) of the insulating base (1); a heat dissipation skylight (21) is mounted on one side of the top of the insulating upper cover (2), and two wire clamping members (22) are mounted on the other side of the insulating upper cover (2), and a wire clamping groove is formed between the two wire clamping members (22).

2. The electric tool switch according to claim 1, characterized in that: Four positioning columns B (27) are installed at the side ends of the box body (38); a concave oblique hook (28) is installed on the special U-shaped one-way positioning bracket (31) on the side adjacent to the positioning columns B (27); a fixing hook B (29) is installed on the upper end of the insulating upper cover (2); an inverted L-shaped stopper (30) and a special U-shaped one-way positioning bracket (31) are installed on the other side of the box body (38) adjacent to the positioning columns B (27) on the side of the insulating base (1) and the insulating upper cover 2.

3. The electric tool switch according to claim 1, characterized in that: The pushing member (4) comprises a push rod (23), a main spring (24), a sealing ring (25) and a sliding claw (26); the sealing ring (25) is sleeved on the push rod (23); the sliding claw (26) is fixedly mounted on the upper end of the push rod (23); and the main spring (24) is fixedly mounted on the side end of the push rod (23).

4. The electric tool switch according to claim 1, characterized in that: The forward-reverse small switch (5) comprises a switch body (32), a positioning hole (33), a hook (34), a convex oblique hook (35) and a forward-reverse lever (36), wherein the hook (34) is located outside the switch body (32), the positioning hole (33) is provided on the upper end surface of the switch body (32), and the forward-reverse lever (36) is fixedly mounted on the side end of the switch body (32).

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