Foot switch for controlling rotating speed of motor

Abstract

The utility model discloses a foot switch for controlling the rotating speed of a motor, and the foot switch comprises a bottom plate. The lower end of the bottom plate is provided with a cavity. The circuit board is arranged in the cavity, and a Hall chip is welded on the circuit board; one end of the pedal is hinged to one end of the bottom plate through a connecting mechanism, and the other end of the pedal is connected with the other end of the bottom plate through an elastic reset mechanism. The distance between the magnet block and the Hall chip is adjusted by adjusting the distance between the magnet block and the Hall chip, the rotating speed of the motor is adjusted according to the size of an induced magnetic field of the Hall chip, the rotating speed of the motor is gradually increased along with decrease of the distance between the magnet block and the Hall chip, and the rotating speed of the motor can be adjusted only by pressing the downward pressing position of the pedal during use. The use environment of the pedal switch is increased, and the use convenience of the pedal switch is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of foot switches, in particular to a foot switch controlled by a motor speed. Background Art

[0002] Using a foot switch in a motor control system is a common and convenient operation method. With the foot switch, users can easily control the start and stop of the motor with their feet without having to operate the switch manually. This design is very practical in situations where the motor needs to be started and stopped frequently, such as industrial production lines, tool machinery, transportation equipment and other fields.

[0003] A foot switch usually consists of a pedal and a control circuit. When the user steps on the pedal, the pedal triggers the control circuit to start or stop the motor. However, the current foot switch usually controls the start or stop of the motor. It is not convenient to adjust the motor speed through the foot switch after the motor starts, so that the motor rotation speed is suitable for different use environments, thereby reducing the convenience of using the foot switch. Therefore, we need to propose a motor speed control foot switch to solve the above problems, so that it can accurately control the motor rotation speed according to actual use needs and improve the convenience of use. Utility Model Content

[0004] The purpose of the utility model is to provide a foot switch for controlling the rotation speed of a motor, which can accurately control the rotation speed of the motor according to actual use requirements, improve the convenience of use, and solve the problems raised in the background technology.

[0005] To achieve the above object, the utility model provides the following technical solutions: a foot switch for motor speed control, a bottom plate, a cavity is opened at the lower end of the bottom plate;

[0006] A circuit board installed inside the cavity, with a Hall chip welded on the circuit board;

[0007] A pedal located above the base plate, one end of the pedal being hinged to one end of the base plate through a connecting mechanism, and the other end of the pedal being connected to the other end of the base plate through an elastic resetting mechanism;

[0008] A fixed column is installed on the lower surface of the base plate, and a magnet block is embedded at the lower end of the fixed column. The magnet block is aligned with the Hall chip, and an avoidance hole for the magnet block and the Hall chip to sense is opened on the base plate. When the pedal is pressed down, the reset mechanism is deformed to adjust the sensing distance between the magnet block and the Hall chip.

[0009] Preferably, the connecting mechanism includes a boss and a support plate installed on both sides of the boss, the boss is fixed on the upper surface of one end of the base plate, a recess is provided on the support plate, connecting rods matching the recess are fixed on both sides of one end of the pedal, and the connecting rods are movably clamped inside the recess.

[0010] Preferably, the outside of the boss is sleeved with an outer cover for limiting and fixing one end of the pedal, the support plate and the connecting rod are both located inside the outer cover, and the upper surface of the outer cover and the upper surface of the other end of the pedal are both provided with anti-slip grooves.

[0011] Preferably, the reset mechanism includes two groups of sleeves and compression springs, the two groups of sleeves are fixed on both sides of the lower surface of the other end of the pedal, one end of the compression spring is inserted into the sleeve, and the other end of the compression spring is connected to the upper surface of the base plate.

[0012] Preferably, a mounting hole for installing the compression spring is provided on the upper surface of the bottom plate, and a convex column for sleeve-connecting the other end of the compression spring is provided in the mounting hole.

[0013] Preferably, a notch for installing a circuit board is provided inside the cavity, and a bottom cover is installed at the cavity opening of the cavity by bolts.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model mainly cooperates with a magnet block, a Hall chip and a pedal. During the pedal pressing process, the pedal is used to drive the magnet block to move its position so as to adjust the distance between the magnet block and the Hall chip. The size of the magnetic field induced by the Hall chip is used to adjust the speed of the motor. As the distance between the magnet block and the Hall chip becomes smaller, the speed of the motor gradually increases. When the distance between the magnet block and the Hall chip is the smallest, the speed of the motor is the fastest. When the distance between the Hall chip and the magnet block is the farthest, the motor stops working. When in use, the motor speed can be adjusted by simply pressing the position where the pedal is pressed, thereby increasing the use environment of the pedal switch and improving the convenience of using the pedal switch.

[0016] The utility model can provide a certain buffer and support force to the pedal when the pedal is pressed down by setting the reset mechanism. When the pedal is not subjected to external force, the reset mechanism is used to restore the pedal to its original position, thereby improving the convenience of turning the pedal switch on and off. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 3It is a schematic diagram of the exploded structure of the utility model from a top view;

[0020] Figure 4 It is a schematic diagram of the explosion structure of the utility model when viewed from above.

[0021] In the figure: 1. bottom plate; 2. pedal; 21. connecting rod; 22. support plate; 23. notch; 3. outer cover; 4. reset mechanism; 41. sleeve; 42. compression spring; 5. bottom cover; 6. fixing column; 7. circuit board; 8. boss; 9. avoidance hole; 10. mounting hole; 11. Hall chip; 12. magnet block; 13. cavity. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 The utility model provides a technical solution: a foot switch for controlling the speed of a motor, comprising: a bottom plate 1, a cavity 13 is provided at the lower end of the bottom plate 1; a circuit board 7 is installed inside the cavity 13, a Hall chip 11 is welded on the circuit board 7, and the Hall chip 11 can detect the change of the magnetic field by utilizing the induction distance between the Hall chip 11 and the magnet block 12. When the magnet block 12 approaches or moves away from the Hall chip 11, the induced magnetic field change will be detected by the sensor, so that it can be used to adjust the speed of the motor;

[0024] A pedal 2 is located above the base plate 1, one end of the pedal 2 is hinged to one end of the base plate 1 through a connecting mechanism, and the other end of the pedal 2 is connected to the other end of the base plate 1 through an elastic reset mechanism 4;

[0025] The connecting mechanism includes a boss 8 and a support plate 22 installed on both sides of the boss 8. The boss 8 is fixed on the upper surface of one end of the base plate 1. A recess 23 is provided on the support plate 22. Connecting rods 21 matching the recess 23 are fixed on both sides of one end of the pedal 2. The connecting rod 21 is movably engaged in the inside of the recess 23, so that the pedal 2 can be pressed downward with the connecting rod 21 as the axis, so as to drive the fixed column 6 to move downward through the pedal 2, thereby adjusting the distance between the magnet block 12 on the fixed column 6 and the Hall chip 11.

[0026] The outside of the boss 8 is sleeved with an outer cover 3 for fixing one end of the pedal 2 in a limited position. The support plate 22 and the connecting rod 21 are both located inside the outer cover 3. The upper surface of the outer cover 3 and the upper surface of the other end of the pedal 2 are both provided with anti-skid patterns. The outer cover 3 protects the hinged end of the pedal 2 to prevent the pedal 2 from falling off the support rod, thereby improving the stability of the pedal 2 when used. The anti-skid patterns are used to effectively increase the friction force on the surface of the pedal 2 and reduce the chance of slipping when pedaling.

[0027] A fixed column 6 is installed on the lower surface of the base plate 1, and a magnet block 12 is embedded at the lower end of the fixed column 6. The magnet block 12 is aligned with the Hall chip 11, and an avoidance hole 9 for sensing the magnet block 12 and the Hall chip 11 is opened on the base plate 1. When the pedal 2 is pressed down, the reset mechanism 4 is deformed to adjust the sensing distance between the magnet block 12 and the Hall chip 11.

[0028] The reset mechanism 4 includes two groups of sleeves 41 and compression springs 42. The two groups of sleeves 41 are fixed on both sides of the lower surface of the other end of the pedal 2. One end of the compression spring 42 is inserted into the sleeve 41, and the other end of the compression spring 42 is connected to the upper surface of the base plate 1. When the pedal 2 is pressed down, the sleeve 41 is pressed down to compress the spring 42. The compression spring 42 can provide a certain buffer and support force to the pedal. At this time, the compression spring 42 is in a compressed state. When the pedal 2 is released, the rebound force of the compression spring 42 is used to restore the pedal 2 to its original state, thereby improving the convenience of switching the pedal 2 on and off.

[0029] The upper surface of the base plate 1 is provided with a mounting hole 10 for installing the compression spring 42. The mounting hole 10 is provided with a boss for the other end of the compression spring 42 to be sleeved. The boss is used to increase the stability of the compression spring 42 and prevent the compression spring 42 from sliding in the mounting hole 10.

[0030] The cavity 13 is provided with a notch for installing the circuit board 7 inside, and a bottom cover 5 is installed at the cavity opening of the cavity 13 by bolts, so that the bottom cover 5 is detachable, which is convenient for removing the bottom cover 5 to install the circuit board 7 and for subsequent maintenance.

[0031] When in use, step on the anti-grain part of the pedal 2 with your foot. When the pedal 2 is pressed down, the pedal 2 is used to drive the magnet block 12 to move its position to adjust the distance between the magnet block 12 and the Hall chip 11. The size of the induced magnetic field of the Hall chip 11 is used to adjust the speed of the motor. As the distance between the magnet block 12 and the Hall chip 11 becomes smaller, the speed of the motor gradually increases. When the distance between the magnet block 12 and the Hall chip 11 is the smallest, the speed of the motor is the fastest. When the distance between the Hall chip 11 and the magnet block 12 is the farthest, the motor stops working. When in use, you only need to press the depressed position of the pedal 2 to complete the adjustment of the motor speed, which increases the use environment of the pedal 2 switch and improves the convenience of using the pedal 2 switch.

[0032] 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. A foot switch for controlling motor speed, characterized in that: include: A bottom plate (1), wherein a cavity (13) is formed at a lower end of the bottom plate (1); A circuit board (7) installed inside the cavity (13), a Hall chip (11) being welded on the circuit board (7); a pedal (2) located above the base plate (1), one end of the pedal (2) being hinged to one end of the base plate (1) via a connecting mechanism, and the other end of the pedal (2) being connected to the other end of the base plate (1) via an elastic resetting mechanism (4); A fixing column (6) is mounted on the lower surface of the base plate (1), a magnet block (12) is embedded at the lower end of the fixing column (6), the magnet block (12) and the Hall chip (11) are arranged in an aligned manner, and a position avoidance hole (9) for sensing the magnet block (12) and the Hall chip (11) is provided on the base plate (1), and when the pedal (2) is pressed down, the reset mechanism (4) is deformed to adjust the sensing distance between the magnet block (12) and the Hall chip (11).

2. A foot switch for controlling motor speed according to claim 1, characterized in that: The connection mechanism comprises a boss (8) and support plates (22) mounted on both sides of the boss (8); the boss (8) is fixed to the upper surface of one end of the base plate (1); a notch (23) is provided on the support plate (22); connecting rods (21) matching the notch (23) are fixed on both sides of one end of the pedal (2); the connecting rods (21) are movably clamped inside the notch (23).

3. A foot switch for controlling motor speed according to claim 2, characterized in that: The outer portion of the boss (8) is sleeved with an outer cover (3) for fixing one end of the pedal (2) in a limited position, the support plate (22) and the connecting rod (21) are both located inside the outer cover (3), and the upper surface of the outer cover (3) and the upper surface of the other end of the pedal (2) are both provided with anti-slip grooves.

4. A foot switch for controlling motor speed according to claim 3, characterized in that: The reset mechanism (4) comprises two sets of sleeves (41) and a compression spring (42), the two sets of sleeves (41) being fixed on both sides of the lower surface of the other end of the pedal (2), one end of the compression spring (42) being inserted into the interior of the sleeve (41), and the other end of the compression spring (42) being connected to the upper surface of the base plate (1).

5. A foot switch for controlling motor speed according to claim 4, characterized in that: The upper surface of the bottom plate (1) is provided with a mounting hole (10) for mounting the compression spring (42), and a convex column for sleeve-engaging the other end of the compression spring (42) is provided in the mounting hole (10).

6. A foot switch for controlling motor speed according to claim 5, characterized in that: A notch for mounting a circuit board (7) is provided inside the cavity (13), and a bottom cover (5) is mounted at the cavity opening of the cavity (13) via bolts.

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