Electric tool switch convenient to adjust

Abstract

The utility model discloses an electric tool switch convenient to adjust, which comprises a button seat, an adjusting groove is formed in the button seat, a sliding column is slidably mounted in the adjusting groove, movable contacts are fixedly mounted on the two sides of the surface of the sliding column, limiting channels are formed in the upper side and the lower side of the surface of the button seat, and pushing plugs are slidably mounted in the limiting channels. One end of the threaded hole is fixedly connected with an adjusting frame, one side of the surface of the sliding column is provided with a telescopic groove, the interior of the telescopic groove is fixedly connected with a first telescopic spring, one side of the interior of the adjusting groove is fixedly provided with a conductive strip, and one side of the conductive strip is fixedly provided with a resistor strip. The beneficial effects of the utility model are that the adjusting frame drives the push plug to move in the limiting channel, so that the push plug adjusts the opening of the limiting channel and is used for controlling whether the limiting column can enter the limiting channel or not, thereby realizing the adjustment of the contact mode of the movable contact on the surface of the sliding column and the resistor strip; therefore, free adjustment of stepless speed regulation and graded speed regulation of the electric tool switch is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of switches, and more specifically, to an electric tool switch that is convenient to adjust. Background Art

[0002] In the current electric tool market, the high efficiency and flexibility of electric tools are one of the key concerns of users. Among them, the speed control of electric tools is crucial for meeting different operation requirements. The existing electric tool switch technologies can be mainly divided into two categories in terms of speed regulation methods: stepless speed regulation and stepped speed regulation. Stepless speed regulation realizes the smooth change of the motor speed through continuous adjustment. This speed regulation method can provide a high degree of precise control, especially suitable for tasks that require fine processing. In contrast, stepped speed regulation switches through several preset speed gears. It is easy to operate and can ensure that the electric tool runs stably at a fixed speed for a long time. It is suitable for continuous operation scenarios such as drilling and grinding, which not only reduces the labor intensity of the operator but also ensures the operation efficiency.

[0003] However, there is a common problem in the existing electric tool switches, that is, most switches only support one of the speed regulation methods, stepless speed regulation or stepped speed regulation, lacking flexibility. In practical applications, users may need to switch the speed regulation method according to different processing tasks at any time, but the existing switch designs often cannot meet this requirement. If users need to change the speed regulation method, they often need to replace the entire switch or the electric tool, which not only increases the use cost but also reduces the work efficiency. For the problems in the related technologies, no effective solutions have been proposed yet. Summary of the Utility Model

[0004] In view of the problems in the related technologies, the utility model provides an electric tool switch that is convenient to adjust to overcome the above technical problems existing in the existing related technologies.

[0005] To this end, the specific technical solution adopted by the utility model is as follows:

[0006] An electric tool switch that is convenient to adjust, including a button seat. An adjustment groove is opened inside the button seat. A sliding column is slidably installed inside the adjustment groove. Moving contacts are fixedly installed on both sides of the surface of the sliding column. Limit channels are opened on the upper and lower sides of the surface of the button seat. A push plug is slidably installed inside the limit channels. A threaded hole is opened on one side of the limit channels. A positioning bolt is threadedly connected inside the threaded hole. One end of the threaded hole is fixedly connected to an adjustment frame. The adjustment frame is slidably connected to one side of the positioning bolt. Both ends of the adjustment frame are fixedly connected to the push plug. A telescopic groove is opened on one side of the surface of the sliding column. A first telescopic spring is fixedly connected inside the telescopic groove. The end of the first telescopic spring is fixedly connected to a limit post. The limit post cooperates with the limit channel. A conductive strip is fixedly installed on one side inside the adjustment groove. A resistance strip is fixedly installed on one side of the conductive strip.

[0007] Further, in order to achieve the automatic reset of the sliding column in the adjustment groove, a support ring is fixedly connected to one side of the inner wall of the adjustment groove. A return spring is fixedly connected to the surface of the support ring, and the top of the return spring is fixedly connected to a pressing cover, which is fixedly connected to the sliding column.

[0008] Further, in order to achieve the electrical connection between the button seat and the power tool, a wiring hole is opened on the bottom surface of the button seat.

[0009] Further, in order to facilitate the rotation of the positioning bolt, a screwing rod is fixedly connected to one end of the positioning bolt.

[0010] Further, in order to facilitate the contraction of the return spring after the sliding column is pressed, a contraction groove is opened on the bottom surface of the pressing cover, and the top of the return spring is fixedly connected in the contraction groove.

[0011] Further, in order to facilitate the fixed installation of the button seat on the power tool, mounting plates are fixedly connected to both sides of the surface of the button seat, and positioning holes are opened on the surface of the mounting plates.

[0012] Further, in order to facilitate the pressing adjustment of the adjustment frame, a pressing plate is fixedly installed on one side of the surface of the adjustment frame.

[0013] The beneficial effects of the present utility model are as follows: The pushing plug is driven by the adjustment frame to move in the limiting channel, so that the pushing plug freely adjusts the opening and closing of the limiting channel on the inner wall of the adjustment groove. When the limiting channel is open, the sliding column drives the limiting column to move in the adjustment groove. After the limiting column enters different limiting channels, the sliding column no longer slides, so that the contact between the moving contact and the resistance strip always remains in the same state, realizing the hierarchical speed regulation of the fixed gear of the power tool switch; when the limiting channel is closed by the pushing plug, the sliding column drives the limiting column to move in the adjustment groove, and the limiting column cannot enter the limiting channel. The contact position between the moving contact and the resistance strip can be changed at any time by changing the pressing force, realizing the stepless speed regulation of the power tool switch; users can easily switch freely between high-precision stepless speed regulation and efficient and stable hierarchical speed regulation according to actual working needs, greatly broadening the application range of the power tool and improving the versatility and adaptability of the tool. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1Schematic diagram of the surface structure of an easily adjustable electric tool switch according to an embodiment of the present utility model;

[0016] Figure 2 Schematic diagram of the internal structure of the button seat in an easily adjustable electric tool switch according to an embodiment of the present utility model;

[0017] Figure 3 Internal sectional view of the button seat in an easily adjustable electric tool switch according to an embodiment of the present utility model

[0018] Figure 4 Internal sectional view of the sliding column in an easily adjustable electric tool switch according to an embodiment of the present utility model.

[0019] In the figure:

[0020] 1. Button seat; 2. Adjustment groove; 3. Sliding column; 4. Moving contact; 5. Limiting channel; 6. Pushing plug; 7. Threaded hole; 8. Positioning bolt; 9. Adjusting frame; 10. Telescopic groove; 11. First telescopic spring; 12. Limiting column; 13. Conductive strip; 14. Resistance strip; 15. Support ring; 16. Reset spring; 17. Pressing cover; 18. Wiring hole; 19. Turning rod; 20. Shrinking groove; 21. Mounting plate; 22. Positioning hole; 23. Pressing plate; 24. Second telescopic spring. Specific implementation manner

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] According to an embodiment of the present utility model, an easily adjustable electric tool switch is provided.

[0023] Embodiment 1:

[0024] Such as Figures 1 - 4As shown in the figure, an adjustable electric tool switch according to an embodiment of the present utility model includes a button seat 1 in the shape of a metal rectangle. A cylindrical adjustment groove 2 is opened inside the button seat 1. A sliding column 3 is slidably installed inside the adjustment groove 2. Moving contacts 4 are fixedly installed on both sides of the surface of the sliding column 3. The two moving contacts 4 are connected to a power source through a wire. A pair of limiting channels 5 are opened on the upper and lower sides of the surface of the button seat 1. The limiting channels 5 are connected to the adjustment groove 2 in a through manner. A pushing plug 6 that matches the inner wall thereof is slidably installed inside each limiting channel 5. A threaded hole 7 is opened between the two limiting channels 5 on the surface of the button seat 1. A positioning bolt 8 is threadedly connected inside the threaded hole 7. One end of the threaded hole 7 is fixedly connected to a second telescopic spring 24. The end of the second telescopic spring 24 is fixedly connected to an adjustment frame 9. The adjustment frame 9 is slidably connected to one side of the positioning bolt 8. Both ends of the adjustment frame 9 are fixedly connected to the pushing plug 6. By pressing the adjustment frame 9, the pushing plug 6 can be driven to move inside the limiting channel 5. A telescopic groove 10 is opened on one side of the surface of the sliding column 3. A first telescopic spring 11 is fixedly connected inside the telescopic groove 10. The end of the first telescopic spring 11 is fixedly connected to a limiting column 12. The limiting column 12 cooperates with the limiting channel 5. When the sliding column 3 drives the limiting column 12 to move to the position of the limiting channel 5, due to the elastic force of the first telescopic spring 11, the limiting column 12 is fitted and installed inside the limiting channel 5, so as to limit the movement of the sliding column 3 inside the adjustment groove 2. By driving the pushing plug 6 to move through the adjustment frame 9, the limiting column 12 can be pushed out of the limiting groove, so that the sliding column 3 can continue to slide inside the adjustment groove 2. A conductive strip 13 is fixedly installed on one side inside the adjustment groove 2. A resistance strip 14 is fixedly installed on one side of the conductive strip 13. The resistance values of the resistance strip 14 decrease sequentially from top to bottom. The conductive strip 13 and the resistance strip 14 are connected to the electric tool body through a wire. A circuit is formed by the contact between the conductive strip 13 and the resistance strip 14 and the two moving contacts 4 on the surface of the sliding column 3, so as to connect the electric tool to the power source. And different resistance values output different voltages, thereby realizing the adjustment of the rotation speed of the electric tool.

[0025] As Figures 1 - 4As shown in the figure, on one side of the inner wall of the adjustment groove 2, there is a fixed connection with a support ring 15. On the surface of the support ring 15, there is a fixed connection with a return spring 16. At the top of the return spring 16, there is a fixed connection with a pressing cover 17. The pressing cover 17 is fixedly connected to the sliding column 3. On the bottom surface of the pressing cover 17, there is a shrinkage groove 20. The top of the return spring 16 is fixedly connected within the shrinkage groove 20. By pressing, the sliding column 3 enters into the adjustment groove 2, and the return spring 16 is compressed and shrunk within the shrinkage groove 20. When the sliding column 3 is no longer under extrusion, the return spring 16 extends through its own elastic force, causing the sliding column 3 to automatically return to its initial position; on the bottom surface of the button seat 1, there is a wiring hole 18 for the conductive strip 13 and the resistance strip 14 to be electrically connected to the power tool body through wires; at one end of the positioning bolt 8, there is a fixed connection with a turning rod 19 for facilitating the turning and rotation of the positioning bolt 8; on both sides of the surface of the button seat 1, there are fixed connections with mounting plates 21. On the surface of the mounting plates 21, there are positioning holes 22 for facilitating the fixed installation of the button seat 1 on the power tool through bolts; on one side of the surface of the adjustment frame 9, there is a fixedly installed pressing plate 23 for facilitating the pressing and pushing of the adjustment frame 9.

[0026] In order to facilitate the understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process will be described in detail below.

[0027] In summary, by means of the above technical solution of the present utility model, during actual use, the position of the end of the adjusting frame 9 and the pushing plug 6 in the limiting channel 5 is changed by turning the positioning bolt 8. When one end of the positioning bolt 8 is turned to a position where the second telescopic spring 24 can restore its original length, the second telescopic spring 24 pushes the adjusting frame 9 to move the pushing plug 6 to the middle position of the limiting channel 5, thereby opening one end of the limiting channel 5 on the inner wall of the adjusting groove 2. By pressing the cover 17 to press the sliding column 3 downward, the sliding column 3 drives the limiting column 12 to move in the adjusting groove 2. After the limiting column 12 enters the limiting channel 5 through the first telescopic spring 11, the sliding column 3 stops sliding. At this time, the two moving contacts 4 on the surface of the sliding column 3 are respectively in contact with the conductive strip 13 and the resistance strip 14, forming an energized circuit to start the power tool at a fixed speed; by pressing the adjusting frame 9 to drive the pushing plug 6 to move in the limiting channel 5, the limiting column 12 can be pushed out of the limiting groove, enabling the sliding column 3 to continue to drive the limiting column 12 to slide in the adjusting groove 2. After continuously pressing the sliding column 3, the sliding column 3 drives the limiting column 12 to move into the limiting channel 5 at the bottom of the adjusting groove 2. At this time, the contact points on the surface of the sliding column 3 are in contact with the conductive strip 13 and the resistance strip 14 at different positions, changing the resistance value in the energized circuit, and further enabling the power tool to rotate at the speed of another gear, realizing the step-less speed regulation of the power tool; when the adjusting frame 9 drives the pushing column to move to one end of the limiting channel 5 close to the adjusting groove 2 by turning the positioning bolt 8, the pushing plug 6 completely closes one end of the limiting channel 5. When pressing the sliding column 3 to drive the limiting column 12 to move in the adjusting groove 2, the limiting column 12 cannot enter the limiting channel 5. By continuously changing the pressing force, the contact position between the moving contact 4 and the resistance strip 14 can be changed at any time to precisely adjust the speed, realizing the stepless speed regulation of the power tool switch.

[0028] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An easily adjustable electric tool switch, characterized in that: The invention comprises a button seat (1), wherein an adjusting groove (2) is provided inside the button seat (1), a sliding column (3) is slidably installed inside the adjusting groove (2), moving contacts (4) are fixedly installed on both sides of the surface of the sliding column (3), a limiting channel (5) is provided on the upper and lower sides of the surface of the button seat (1), a push plug (6) is slidably installed inside the limiting channel (5), a threaded hole (7) is provided on one side of the limiting channel (5), a positioning bolt (8) is threadedly connected to the inside of the threaded hole (7), an adjusting frame (9) is provided at one end of the threaded hole (7), and the The adjusting frame (9) is slidably connected to one side of the positioning bolt (8), and the two ends of the adjusting frame (9) are fixedly connected to the pushing plug (6). A telescopic groove (10) is provided on one side of the surface of the sliding column (3), and a telescopic spring (11) is fixedly connected inside the telescopic groove (10). The end of the telescopic spring (11) is fixedly connected to a limiting column (12), and the limiting column (12) cooperates with the limiting channel (5). A conductive strip (13) is fixedly installed on one side of the adjusting groove (2), and a resistor strip (14) is fixedly installed on one side of the conductive strip (13).

2. The easily adjustable electric tool switch according to claim 1, characterized in that: A support ring (15) is fixedly connected to one side of the inner wall of the adjustment groove (2), a return spring (16) is fixedly connected to the surface of the support ring (15), a pressing cover (17) is fixedly connected to the top of the return spring (16), and the pressing cover (17) is fixedly connected to the sliding column (3).

3. The easily adjustable electric tool switch according to claim 1, characterized in that: The bottom surface of the button seat (1) is provided with a wiring hole (18).

4. The easily adjustable electric tool switch according to claim 1, characterized in that: One end of the positioning bolt (8) is fixedly connected to a twisting rod (19).

5. The easily adjustable electric tool switch according to claim 2, characterized in that: The bottom surface of the pressing cover (17) is provided with a contraction groove (20), and the top of the return spring (16) is fixedly connected in the contraction groove (20).

6. The easily adjustable electric tool switch according to claim 1, characterized in that: Mounting plates (21) are fixedly connected to both sides of the surface of the button seat (1), and positioning holes (22) are opened on the surface of the mounting plates (21).

7. The easily adjustable electric tool switch according to claim 1, characterized in that: A pressing plate (23) is fixedly mounted on one side of the surface of the adjustment frame (9), one end of the threaded hole (7) is fixedly connected to a second telescopic spring (24), and the end of the second telescopic spring (24) is fixedly connected to the adjustment frame (9).

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